Patent Application
20240286865
The invention relates to a sleeve plate for a textile machine. The invention relates to a wear device. The invention relates to a textile machine. The invention further relates to a bobbin frame.
Sleeve plates are known in the field of textile machines, in particular spinning machines or twisting machines. It is known in this context that the sleeve plates are designed to receive an opening of an end face of a bobbin sleeve for winding a bobbin in a winding process. The bobbin is held and centered by being received. The receiving must be carried out after a run-up rotational state, also realized as a run-up rotation process or a run-up rotation method.
A run-up rotational state is a state in which the bobbin is pre-accelerated in order to reach a correspondingly high rotational speed in order to reach the process speed.
The bobbin sleeve has to be received as far as possible without interruption, since a sudden braking of the bobbin sleeve during contact with the sleeve plate or with a receiving device or also centering device on the sleeve plate can lead to damage to the sleeve plate and/or to the bobbin sleeve, which can have a negative effect on the winding process or can even cause an interruption of the winding process.
It is therefore the object of the invention to simplify exchanging a bobbin. In particular, the object of the invention is to improve the receiving of a bobbin sleeve on a sleeve plate during a transition from a run-up rotational state to a winding state, thereby increasing the process reliability and thereby saving resources.
The object is achieved by a sleeve plate having the features of claim 1. The object is achieved by a functional device, in particular a wear device, having the features of claim 15. The object is achieved by a textile machine, in particular a spinning machine, having the features of claim 16, or by a bobbin frame having the features of claim 16.
Advantageous embodiments of the invention are the subject matter of the dependent claims.
According to one aspect, the object is achieved by a sleeve plate having the features of claim 1.
A sleeve plate can be designed to support and center a bobbin sleeve. The sleeve plate can have a centering projection and a main body with a surface side. The main body is in particular designed circular, furthermore in particular plate-like. The centering projection serves in particular as a centering device. The centering projection is designed in particular to be received through an opening in an end face of the bobbin sleeve. The centering projection is arranged rotationally centered on the surface side of the main body and in particular projects from this surface. In particular, it is designed to center the bobbin sleeve when the bobbin sleeve is in a received state. The centering projection can have a lateral surface. A functional device can be or is assigned to the centering projection. In particular, the functional device can be or is assigned to the lateral surface of the centering projection. This allows new functions to be transferred to the centering projection. This can simplify a change of bobbin. As a result, the receiving of a bobbin sleeve on a sleeve plate can be improved during a transition from a run-up rotational state to a winding state, thereby increasing the process reliability and thereby saving resources.
A run-up rotational state can exist when there is a bobbin change, for example as an intermediate step in a bobbin changing method. In such a method, a full bobbin (when a predefined diameter is reached) can be removed and replaced by an empty bobbin sleeve. In a run-up rotational state or in a corresponding method step, the sleeve plate tilts with a thread application head in a bobbin frame of the spinning machine. A gap can thereby be formed between the sleeve plate and the bobbin sleeve. The thread can be inserted into the gap produced thereby between the tilted sleeve plate and the (horizontally lying) sleeve end (also referred to as the end face). During a transition to a received state of the bobbin sleeve, the bobbin sleeve can therefore be placed against the centering device, in particular the centering projection.
Sleeve plates can serve to hold and center a bobbin sleeve (or also a bobbin) so that the bobbin sleeve can be rotated by means of the sleeve plate. The sleeve plate can have a main body which can be used, for example, to allow the sleeve plate to be inserted into a bobbin tensioning device arm in that it can be rotatably mounted. The sleeve plate can have a cylinder or cone on which the bobbin sleeve can be arranged centered. This cylinder or cone can be referred to as a centering device or as a centering projection. It can in particular have been formed integrally with the rest of the sleeve plate, for example by an injection molding method.
The sleeve base can correspond to an end face that is designed to make contact with the surface of the sleeve plate. The surface of the sleeve plate can in particular be designed as a plastic surface. When placing the thread on the pre-accelerated bobbin sleeve as described above, the sleeve plate can be tilted by a thread application head in order to guide the thread that is to be applied between the bobbin sleeve and sleeve plate. There can be embodiments in which the bobbin sleeve rests on the sleeve plate with a contact region, in particular with only a point contact. Nevertheless, if sufficient pressure is applied by the bobbin sleeve, the bobbin sleeve can be deformed, which means that no longer just a mathematical point, but rather a contact surface, is formed. The bobbin sleeve is a bearing body, in particular made cylindrically, on which the bobbin can be borne. For the task of the bobbin (in other words, to form the bobbin), the sleeve can be mounted between two sleeve plates. In this case, the two sleeve plates can each be assigned to an arm of a bobbin frame in that they can be rotatably mounted. The bobbin sleeve is then rotated by frictional contact with the end face or with its edge, and the surface of the sleeve plate rotates simultaneously with the sleeve plate in a received state. Here it is possible for a thread to be clamped between the end face, or the edge, and the surface of the sleeve plate when the bobbin sleeve is in a received state. It is thereby possible for the thread to be clamped between two points in the respective edge regions of the bobbin sleeve, whereby the thread forms a cutting line through the circular cross section within the circular cross-section at the edge (also at the end face) of the bobbin sleeve. It is thereby possible to fix the thread relative to this circular cross section, whereby a rotation of the cross-sectional line through the thread region can be carried out. As a result, a tracked thread can be wound onto the bobbin sleeve or onto the forming bobbin.
The sleeve plate, but also the centering projection, can be designed rotationally symmetrical. Here, “rotationally symmetrical” refers in particular to the mathematical definition of rotational symmetry. Here, a simple rotationally symmetrical shape can be approximately a circular shape which forms the frontal surface which is situated opposite the end face of the bobbin sleeve in an applied state.
The functional device can in particular be designed to be retrofittable. As a result, it can be subsequently assigned to the centering projection. This allows new functionalities to be transferred to the centering projection. A functional device can have a lateral surface which can be assigned to a lateral surface of the centering projection. The functional device can have an inner radius and an outer radius, wherein a lateral surface on the inner radius can be brought into contact with a lateral surface of the centering projection, and wherein a lateral surface on the outer radius can be brought into contact with a bobbin sleeve when it is received. Different types of bobbin sleeves can hence be arranged on a centering projection. Retrofitting can be carried out in such a way that different bobbin sleeves are used in an assembled and operational state of the textile machine, in particular the spinning machine, as described elsewhere, without having to completely replace the sleeve plates or the bobbin frames.
In other words, a type of sleeve plate can be provided which can be retrofitted together with another device to adapt the previously described bobbin frame to different sleeve inner diameters. In particular, this can be done without having to remove the entire bobbin frame or bobbin frame arm and any (high-precision) ball bearings arranged therein. This makes it easier to exchange different types of bobbin sleeves. This can also reduce the costs, in particular material costs, of an exchange.
According to one aspect, the functional device can be designed as at least one of a thread guide that can be assigned to the lateral surface, and/or a wear device that can be or is assigned to the lateral surface on a base of the centering projection. A new functionality can thereby be transferred to the sleeve plate. This makes it easier to configure a change of bobbin sleeves, and this allows process reliability to be improved.
A thread guide can be designed in such a way that it guides a thread when the sleeve plate rotates in a run-up rotational state of the bobbin sleeve. In particular, the thread is applied in the thread guide so that it is not guided directly over the surface of the centering projection through the gap between the sleeve plate and the sleeve end face in a tilted configuration of the bobbin sleeve. The thread can run in a first direction towards the thread guide and contact it. The thread can run around a region of the thread guide, in particular around at least part of a circumference of the centering projection. The thread can run out of the contact area of the thread guide in a second direction. This means that the thread guide can also function as a deflection device. The thread guide makes it possible to generate a safe thread reserve on a pre-accelerated bobbin sleeve at higher take-off speeds, in particular above 300 m/min, as described elsewhere, and to prevent the thread from being wound between the bobbin sleeve and the sleeve plate. The process reliability is thereby improved, and downtimes can be reduced. The resource outlay is thereby reduced, and the costs are decreased.
According to one embodiment, it can be provided that the thread guide can be assigned to a lateral surface of the centering projection by arranging it on the lateral surface of the centering projection. According to other embodiments, the thread guide may not be part of the lateral surface of the centering projection or may not be arranged thereon, but the thread guide may be assigned to the lateral surface as described elsewhere.
In one embodiment, the thread guide can have at least one hook. Alternatively or additionally, the thread guide can have a first contact area with the thread and a second contact area with the thread in such a way that the thread can be guided between the two contact areas.
The wear device, in particular in the form of a wear ring, can be designed and arranged in such a way that an end-face edge of the bobbin sleeve to be received can be placed in a contact area. In this case, the wear device can surround the sleeve plate in such a way that the contact region remains located in the wear device in a run-up rotational state of the bobbin sleeve. Because the contact region (the same holds true for a point contact) remains in the region of the wear device, the sleeve plate cannot be damaged. To this end, the wear device can be designed in particular to exhibit less wear than the material of the rest of the sleeve plate would under the same conditions.
According to one aspect, the frustoconical lateral surface can be the lateral surface of the centering projection. In particular, the frustoconical lateral surface is designed and arranged in such a way that it faces the inside of a bobbin sleeve when the bobbin sleeve is in the received state. A thread guide can be arranged and designed in a region of the lateral surface in such a way as to guide a thread during run-up rotation of the bobbin sleeve and to clamp the thread between the end face of the bobbin sleeve and the main body when the bobbin sleeve is in the received state. The holding of the thread in a received state can thereby be separated from a holding of the thread in a run-up rotational state. This allows the thread to be held better in both configurations, in particular in that the thread course in the sleeve plate region can be held separately from the bobbin sleeve support. It is in particular possible for the bobbin sleeve to be moved relative to the sleeve plate in a run-up rotational state. This may be due to the fact that the sleeve plate has a greater mass and therefore a greater mass inertia than the bobbin sleeve. Holding the thread in/on a thread guide prevents the thread from moving into the contact area (especially point contact) between the bobbin sleeve and the sleeve plate. This can in particular reduce the risk of the method having to be interrupted, for example in order to draw in a new thread because it has been rubbed to the point of breaking during the run-up rotation. It is thereby possible to increase the process reliability. The resource outlay can thereby be reduced, and the costs can be reduced.
A frustoconical lateral surface can be assigned to the centering projection. A frustoconical lateral surface can in this way be applied to the inner side of a bobbin sleeve. This allows a step-free (uninterrupted) transition from a run-up rotational state to an applied state (also referred to as a received state) of the bobbin sleeve. This reduces the risk of jamming, for example. The risk of damage to the bobbin sleeve and/or the sleeve plate can thereby be reduced. A frustoconical design of the centering projection can be such that the bobbin sleeve is guided on the base of the centering projection, i.e. in particular without first coming into contact with the surface side of the centering projection. This can reduce the risk of jamming.
A frustoconical lateral surface can be assigned to the centering projection, wherein the centering projection itself can have a lateral surface. This surface can in particular be designed such that it can contact the inner side of the sleeve at least in a region of the lateral surface when the bobbin sleeve is received in order to form the bobbin, as described above. In one embodiment, the lateral surface of the centering projection itself can be designed as a frustoconical lateral surface. In such an embodiment, the lateral surface of the centering projection and the function of the frustoconical lateral surface thus coincide. In other words, one can say that the lateral surface of the centering projection in such an embodiment is a frustoconical lateral surface.
In other words, and in summary, this means that in one embodiment, the sleeve plate can be designed to support and center a bobbin sleeve. The sleeve plate can have a centering projection with a frustoconical design to be received through an opening of an end face of the bobbin sleeve. The centering projection can be arranged centrally on a surface side of a circular, in particular plate-shaped, main body and can protrude from this surface side. The base side of the frustoconical centering projection can have an outer diameter which can correspond to an inner diameter of the end face of the bobbin sleeve. The frustoconical design of the centering projection can make it possible for the bobbin sleeve to be able to transition to an applied configuration in the transition from a tilted configuration-tilted relative to the sleeve plate—wherein the sleeve inner side can be guided by the truncated cone or by its frustoconical lateral surface. The risk of jamming is thereby reduced, and the process reliability is increased, which in turn can reduce costs.
There can also be embodiments which do not have a frustoconical design of the centering projection, but in which one or more features of the embodiments described below are implemented. As described in detail below, this can also reduce the risk of interrupting a bobbin replacement process and/or a production process. In particular, a lateral surface-irrespective of whether this is itself a frustoconical lateral surface or whether it is designed differently-of the centering projection can be assigned a frustoconical lateral surface, for example by inserting a correspondingly designed device, as described elsewhere, which can supplement the lateral surface of the centering projection. It can thereby be possible to transfer the feature of the frustoconical lateral surface to a centering projection which itself does not have a corresponding frustoconical shape. It may be possible to mount a bobbin that has a larger internal diameter, by making it possible to exchange only one device without however replacing the entire sleeve plate. This also makes it possible for different bobbin sleeves to be held by a sleeve plate.
The run-up rotation of the bobbin sleeve, as well as the received state of the bobbin sleeve, are to be understood here in particular as described in detail. A take-off speed during rotor spinning can be between 200 m/min and 400 m/min, in particular between 250 m/min and 350 m/min, in particular at a maximum of 300 m/min. In air-jet spinning, higher take-off speeds can be between 500 m/min and 700 m/min, in particular between 550 m/min and 650 m/min, and in particular a maximum of 600 m/min. For this purpose, the winding shaft and bobbin sleeve can be pre-accelerated. The higher dynamics in the thread path can result in premature tearing of the thread inserted in the gap between the sleeve plate and the bobbin sleeve, and consequently a proper yarn reserve cannot be wound onto the bobbin sleeve.
The centering projection can have a surface which, in an applied state of the bobbin sleeve, can in particular come to lie (largely) parallel to a received end face of the bobbin sleeve when the sleeve end face is applied to the surface side of the main body.
According to one aspect, the thread guide can be a groove which is formed and arranged in such a way as to receive and guide a thread in a region of the circumferential groove. This groove can be assignable to the lateral surface in such a way that it can run around it in order to guide the thread during the run-up rotation of the bobbin sleeve, and in order to clamp the thread between the end face of the bobbin sleeve and the main body when the bobbin sleeve is in the received state. Here, the thread guiding and the holding of the thread provided in both configurations of the bobbin sleeve—tilted and applied—can again take place separately. This improves the holding of the thread, so the risk of the thread wearing through, as described above, can also be reduced. This can improve process reliability and reduce potential downtimes. Resources can thereby be saved.
The run-up rotation of the bobbin sleeve, as well as the received state of the bobbin sleeve, are to be understood here in particular as described in detail.
The groove can be assignable to the lateral surface of the centering projection. “Assignable” can be understood here to mean that the groove has a functional relationship to the lateral surface of the centering projection. In embodiments, the groove can be designed as a material recess, in particular as an incision that runs around the lateral surface of the centering projection. The groove is in particular arranged directly in the lateral surface of the centering projection. As a result, the thread can be guided in this groove in a region. As a result, the thread in particular does not run along a direct cutting line over the surface of the centering projection through a gap between a surface of the centering projection and the tilted end face of the bobbin sleeve. Rather, the thread can run offset to this direct cutting line by entering the groove in one region and exiting the groove in another region. The thread can run toward the groove in a first direction and enter therein. In this case, the thread can run through a region of the groove, in particular at least around a portion of a circumference of the centering projection. The thread can run out from the contact area of the groove in a second direction. In this way, the groove can also function as a deflection device.
In embodiments, the groove may not be a material recess of the lateral surface of the centering projection, but rather the groove may be a material recess of a lateral surface, wherein the lateral surface having the groove is assigned to the centering projection, as described elsewhere.
According to one aspect, the groove running around the lateral surface can be formed at the transition of the lateral surface to the surface side of the main body, and/or the groove running around the lateral surface can be at least partially formed as a depression in the frustoconical lateral surface of the centering projection in such a way as to form the groove as a depression in the lateral surface. The thread can thereby be guided at two contact areas, which in particular leads to improved thread guidance in a sleeve plate in an arm of a bobbin frame. In this way, the position of the thread in the groove can result in improved height adjustment of a thread application head. Less tension can thereby be exerted on the thread. As a result, less material stress is introduced into the thread, whereby the risk of the thread tearing can be reduced. This can improve process reliability and reduce potential downtimes. Resources can be saved in this way.
In this context, “at the transition of the lateral surface to the surface side of the main body” can in particular be understood as the region in which the centering projection and surface side of the main body merge into one another and/or contact one another. Contacting can exist in particular when the lateral surface with the groove is not formed integrally with the centering projection, but rather, as described elsewhere, the lateral surface with the groove is assigned to the lateral surface of the centering projection.
A circumferential groove in the cone of the sleeve plate allows the thread to run above the clamping region (also known as the contact area; the region above the clamping region can also be referred to as the gap) between the bobbin sleeve and the sleeve plate. When the bobbin sleeve is pre-accelerated, the thread remains in the groove of the rotating sleeve plate, in particular above the clamping region, until the gap is closed.
According to one aspect, the surface side of the main body can comprise a wear device. This can in particular be designed as a wear region.
Further, the wear device can in particular be designed as a wear ring. The wear device can be designed to be arranged on the base of the lateral surface, or arranged on the base of the lateral surface in order to be applied to an end-face edge of the bobbin sleeve to be received in a contact region. In this case, the wear device can surround the sleeve plate in such a way that the contact region remains located in a wear region of the wear device when the bobbin sleeve is in a run-up rotational state. Wear of the sleeve plate can thereby be reduced, which reduces downtimes, which saves resources and reduces costs.
A suitability for being arranged on the base of the lateral surface refers in particular to an ability to retrofit the functional device, in particular as a wear device. After retrofitting, one can speak of a to be arranged.
At this time, there is in particular only contact between the tilted sleeve plate and the bobbin sleeve in the run-up rotational state in one contact area, in particular only a point contact. This can also result in a deformation of the bobbin sleeve, insofar as it can no longer be assumed that there is only a point contact in the mathematical sense. Rather, a contact region which has a surface extension can also be formed. At high production speeds, the bobbin sleeve can in particular be pre-accelerated before the actual application of the thread.
The take-off speed during rotor spinning is as described elsewhere. This can in particular be a maximum of 300 m/min. The take-off speeds for air-jet spinning in particular are as described elsewhere. These speeds can be higher than in the case of rotor spinning. The higher take-off speeds can in particular require up to 600 m/min. The winding shaft and bobbin sleeve can be pre-accelerated for this purpose, as described elsewhere. The high pre-acceleration of the bobbin sleeve and the point contact and/or the contact region between the bobbin sleeve and the sleeve plate can cause increased wear on the contact surface of the sleeve plate. In particular, due to the mass inertia of the sleeve plate, the driven bobbin sleeve rotates on the still-stationary or significantly slower-rotating sleeve plate. In other words, the contact region moves in particular on a circular path about the axis of rotation of the sleeve plate. A wear trace, in particular a wear groove, can as a result be formed by wear in a region of the sleeve plate on which the sleeve base is actually supposed to rest. The bobbin sleeve can then no longer be fully clamped by the bobbin frame, and there is more slippage between the bobbin sleeve and the sleeve plate, particularly during yarn production, as a result of which it is possible for the wear of the sleeve plate to progress more quickly and require premature replacement.
The wear device, in particular in the form of a wear ring, can be designed and arranged in such a way that an end-face edge of the bobbin sleeve to be received can be placed in a contact area. In this case, the wear device can surround the sleeve plate in such a way that the contact region remains located in the wear device in a run-up rotational state of the bobbin sleeve. Because the contact region (the same holds true for a point contact) remains in the region of the wear device, the sleeve plate cannot be damaged. To this end, the wear device can be designed in particular to exhibit less wear than the material of the rest of the sleeve plate would under the same conditions.
According to one aspect, the wear device, which is designed in particular to be rotationally symmetrical, can be embedded in a depression in the surface side of the main body corresponding to the shape of the wear device. As a result, the wear device can reduce wear of the sleeve plate and improve the service life of the sleeve plate. The downtime can thereby be reduced. This can save resources, and costs can be reduced.
Alternatively or additionally, the wear device can be designed to be replaceable. This can make it easier to change the wear device. The downtime can thereby be reduced. This can save resources, and costs can be reduced.
The wear device can be inserted into an (economical) material and/or overmolded thereby. In one embodiment, a wear device, in particular designed as a wear ring, can be designed from steel, which can be glued onto the sleeve plate made of (economical) material.
In one embodiment, the wear device can be designed from steel, in particular as a wear ring, and can be exchangeably fastened to the sleeve plate made of (economical) material.
Fastening can be made possible by at least one fastening device. A fastening device can, for example, comprise magnets and/or clips. This allows the wear device, in particular designed as a wear ring, to be easily exchanged. In particular, replacement can be carried out without removing the sleeve plate. This allows the (relatively expensive) ball bearing to remain in the spinning position. As a result, resources can be saved, and the costs can be reduced. The same can be achieved by reducing the service lives.
According to one aspect, a collar can be formed on a base surface of the wear device which is designed in such a way that, in an assembled state of the wear device, the collar lateral surface is assigned to the lateral surface of the centering projection. The region of the collar, which has an outer diameter on the base side of the centering projection, can correspond to the inner diameter of an end face of the bobbin sleeve in order to center the bobbin sleeve in an applied state. This allows the diameter of the centering projection to be adapted to the inside diameter of different bobbin sleeves.
In particular, a collar is a structure running around the inner radius of a wear device, which is designed to project from the sleeve-side surface of the wear device along the axis of rotation of the sleeve plate. The collar lateral surface can in particular be a frustoconical lateral surface. By arranging the collar, it is thus possible to assign its frustoconical surface to the lateral surface of the centering projection.
The base side of the centering projection is to be understood in particular as the surface enclosed by the lateral surface of the centering projection at the transition to the surface side of the main body. The term “assignment” is to be understood in particular as described elsewhere. An assignment can be a connection in the form of a connection, such as a fixed, in particular structural connecting and/or an arrangement on the structure to which something is assigned. Alternatively, this can also be understood as a functional allocation. In particular, this can involve a combination of a plurality of elements and/or devices that together are assigned to each other in such a way as to realize a particular function and/or particular feature.
According to one aspect, the wear device can have a thread guide which is designed and arranged in such a way as to receive and guide a thread in an assembled state of the wear device in order to guide the thread during the run-up rotation of the bobbin sleeve and to clamp the thread between the end face of the bobbin sleeve and the main body when the bobbin sleeve is in the received state. In this way, a unit can be formed from the thread guide and the wear device. This can improve the holding of the thread, so the risk of the thread wearing through, as described above, can also be reduced. This can improve process reliability and reduce potential downtimes. Resources can be saved in this way.
The terms “run-up rotation of the bobbin sleeve” and “received state of the bobbin sleeve” can be understood as described above. The same holds for the clamping of the thread.
The thread guide can in particular be assigned to the collar. In particular, a groove can be provided in this case. These are described in detail elsewhere and reference is hereby made to these explanations; for reasons of readability and compactness, they are not repeated here.
The combination of a thread guide and a wear device allows in particular a simplified exchange of a thread guide, which can be adapted for example in its hardness and/or surface quality to a thread to be guided. An exchange of a worn wear region can also be simplified.
According to one embodiment, the wear device can be made of a first material, and the collar can be made of a second material. It can be realized that a first material is more advantageous for guiding the thread than for the wear region of the wear device. In particular, this makes it possible to combine the two functionalities described in detail above. In addition, a further adjustment option can also be provided since the centering projection, a collar lateral surface assigned thereto, and a wear device can be produced from different materials. As a result, the material properties required for the different tasks can be taken into account. On the one hand, this can improve the wear of the wear device, on the other hand, it can improve thread guiding, in particular this can reduce material wear of the thread, and the centering projection can be stabilized and/or designed economically. It is thereby possible to save resources and thus reduce costs.
According to one aspect, the thread guide of the wear device can be arranged on the frustoconical lateral surface of the centering projection in such a way that the base surface of the centering projection together with the thread guide arranged on the base surface has an outer diameter which corresponds to an inner diameter of the end face of the bobbin sleeve. This allows the thread guide to be implemented which is able to realize the advantages described above. However, an adaptation to different sleeve diameters can also be carried out.
The terms “centering projection”, “base surface” and “inner of the end face,” as well as “end face,” are to be understood in particular as described elsewhere.
According to one aspect, the thread guide of the in particular exchangeable, in particular rotationally symmetrical, wear device can be designed as a collar on a base surface of the wear device. A groove can be formed in the collar in such a way as to receive and guide a thread in an assembled state in order to guide the thread during the run-up rotation of the bobbin sleeve and to clamp the thread between the end face of the bobbin sleeve and the main body when the bobbin sleeve is in the received state. As a result, the various features, advantages and technical effects described elsewhere with regard to the thread guide, the groove and the wear device can be realized.
According to one aspect, the wear device and the sleeve plate can be made of different materials, in particular different plastics. Alternatively or additionally, the wear device can be made of either PEEK or PPA. Alternatively or additionally, the sleeve plate can be made of PA6.
PEEK is in particular an abbreviation for polyether ether ketone. This is in particular a high-temperature-resistant thermoplastic plastic (melting temperature ˜335° C.), and it belongs to the substance group of the polyaryl ether ketones. This is in particular a (friction-resistant) temperature-resistant and wear-resistant plastic, which in particular increases wear resistance.
PPA is the short form for polyphthalamides. PPA stands in particular for partially aromatic polyamides or partially aromatic polyamides. These are in particular semi-crystalline aromatic polyamides (PA). PPAs are in particular semi-aromatic polyamides in which the amide groups are alternately bonded to aliphatic groups (—R—) and to benzenedicarboxylic acid groups. They belong in particular to the class of thermoplastics. They differ in their properties from the aliphatic polyamides and the aromatic polyamides (aramides). Due to lower friction coefficients and lower abrasion coefficients, it can be used in particular for a friction as used in a wear region of the type described. Unreinforced PPA can have an abrasion coefficient of 10 mm3/(km·kN). When reinforced with 30% glass fiber, it can have a value of 30 mm3/(km·kN). PPA also has a high heat resistance of more than 280° C. The active ingredient can have high tensile strength and rigidity. PPA can as a result reinforce the resistance in an abrasion region.
PA6 can also be referred to as polycaprolactam or polyamide 6; the short name PA6, known as the trademark Perlon, can be used. This is a polymer from the polyamide group, which is inexpensive compared to other plastics. The costs can be reduced as a result.
According to one aspect, the wear device and the sleeve plate can be formed by multi-component injection molding. The different properties of the plastics can be combined, as described elsewhere. In particular, the wear device, the thread guide and/or the sleeve plate can thereby be combined from different plastics, in particular to form one piece. Alternatively, the wear device can be designed in particular with a collar, and further the collar can in particular be used with a thread guide, in particular interchangeably. This can make it easier to change the wear device. As a result, the downtime which would be necessary for changing a sleeve plate can be reduced. This can save resources, and costs can be reduced.
According to one aspect, the wear device can comprise a metallic material, in particular steel, and/or a have metallic material that is sheathed by another material. The wear device can be inserted into (economical) material and overmolded. In one embodiment, a wear device, in particular designed as a wear ring, can be designed from steel, which can be glued onto the sleeve plate made of (economical) material. A stable wear device can thus be provided. The sheathing can adapt the material properties to the specified requirements. In one embodiment, the wear device can be designed from steel, in particular as a wear ring, and can be exchangeably fastened to the sleeve plate made of (economical) material. Material costs can be reduced in this way. This can make it easier to change the wear device. As a result, the downtime which would be necessary for changing a sleeve plate can be reduced. This can save resources, and costs can be reduced.
According to an independent aspect, the object is in particular achieved by a wear device, in particular designed as a wear ring. The features, properties, advantages, and effects described above for the sleeve element can be correspondingly transferred to the wear device, and this can be described accordingly.
The object is achieved in particular, according to an independent aspect, by a textile machine, in particular a spinning machine. Alternatively or additionally, the object is achieved by a bobbin frame. The textile machine and/or bobbin frame can have a sleeve plate as described above. Alternatively or additionally, the textile machine and/or the bobbin frame can have a wear device, in particular designed as a wear ring, in particular as described above. The features, properties, advantages and effects described above for the sleeve plate can be transferred accordingly to the textile machine and/or the bobbin frame, and these can be described accordingly.
In the following, exemplary embodiments of the invention are described in more detail with reference to figures, showing schematically and by way of example:
The same reference signs are used for elements and structures having the same effect and/or of the same type.
Inserting or exchanging can be guided through recesses 146 in the wear ring, which can be brought into engagement with guide elements 134. These recesses and guide elements 134 also allow the sleeve plate 130 to rotate in one piece and, in particular, prevent the wear device from running with a different rotation relative to the sleeve plate 130 during a run-up rotation.
The sleeve plate 130 can be attached to a rotating body (not shown) via screws 144 in holes 138. In particular, a washer 360 together with a bearing 370 is used for rotation about a screw 380, which serves as a rotation anchor (bearing).
The wear device 135 serves in particular to be applied to an end face edge 123 of the bobbin sleeve 120 to be received, in a contact region 126, as shown correspondingly in perspective in
In other words, the thread 122 runs through an in particular circumferential groove 592 in the cone (centering cone, centering device, centering projection 536) of the sleeve plate 530, above the clamping area (contact area, contact region 126) between the bobbin sleeve 120 and the sleeve plate 130. When the bobbin sleeve 120 is pre-accelerated, the thread 122 remains in the groove 592 of the rotating sleeve plate 130, in particular above the clamping area, until the gap 232 is closed.
The thread guide, here the groove 692 of the wear device 635, can assign a frustoconical lateral surface 237 to the centering projection 636 in such a way that the base surface of the centering projection 636 together with the thread guide arranged on the base surface, here the groove 692, has an outer diameter which corresponds to an inner diameter of the inner side 127 of the end face 124 of the bobbin sleeve 120. As a result, the diameter of the centering projection 636 can be correspondingly adapted in order to be able to receive different bobbin sleeves 120. Alternatively or additionally, it is thereby possible for different thread guides to be providable, which can be adapted to the thread 122 to be guided either in their geometry or also in their material condition and their material properties. As a result, the thread 122 can in particular be guided more gently.
The thread guide, here the groove 692 of the wear device 635, can in particular be designed exchangeable. Furthermore, the wear device 635 can in particular be designed rotationally symmetrical. The collar 690 can be formed on a base surface of the wear device 635, wherein the groove 692—as an example of a thread guide-is formed in the collar 690 in order, in a mounted state, to receive and guide a thread 122 in order to guide the thread 122 during the run-up rotation of the bobbin sleeve 120 and, when the bobbin sleeve is in the received state 120, to clamp the thread 122 between the end face 124 of the bobbin sleeve 120 and the main body 131.
“Can” in particular refers to optional features of the invention. Accordingly, there are also developments and/or exemplary embodiments of the invention which additionally or alternatively have the respective feature or the respective features.
From the combinations of features disclosed in the present case, isolated features can also be taken as needed and used by resolving a structural and/or functional relationship possibly existing between the features in combination with other features for delimiting the subject matter of the claim.
| Number | Date | Country | Kind |
|---|---|---|---|
| 504192 | May 2021 | LU | national |
