The present invention relates to a tissue paper winding machine, and more particularly to a gluing mechanism and a gluing method for tissue paper winding machine.
In a conventional tissue paper winding machine, a core is generally sent by a conveyor to a first winding roller and pushed by a core inserter into a curved guiding passage to a winding nip, at where a long tape of tissue paper is wound around the core to form a paper log, such as a rolled tissue paper. During the winding process, a leading edge and a trailing edge of the tissue paper are separately applied with an amount of initial glue and tail glue by way of transfer or using a rotation disc to transfer the glue from the glue tank to the tissue paper.
The rewinding machine with gluing device disclosed in WO 2004/046006 includes a gluing applicator having a glue tank inside which a pick-up roller rotates, partially immersed in the glue contained in the tank. The pads carried at the ends of the teeth or slats forming severing means are driven into contact with the glue applicator and soaked with glue. When the pad is pressed against the web material, it applies to it part of the glue with which it is impregnated. Consequently, a broken longitudinal band of glue is applied along the crosswise extension of the web material.
In the case of applying glue on the tissue paper via transfer, there is often a problem of insufficient or uneven application of glue. And, in the case of applying glue with a rotation disc, the glue tends to be centrifugally thrown off the rotation disc when the latter rotates at a high speed, and subsequently only a small amount of glue is applied onto the tissue paper.
It is therefore a primary object of the present invention to provide a gluing mechanism for tissue paper winding machine, so that a glue is always sufficiently and uniformly applied to the tissue paper.
Another object of the present invention is to provide a gluing mechanism for tissue paper winding machine, with which the tissue paper is applied at predetermined positions with a glue via at least one gluing member that does not directly contact the glue.
A further object of the present invention is to provide a gluing mechanism for tissue paper winding machine having at least one gluing member that allows easy adjustment of a distance between the initial glue and the tail glue respectively applied to the tissue paper at a leading edge and at a trailing edge.
A still further object of the present invention is to provide a method of dispensing glue to a tissue paper by a tissue paper winding machine.
To fulfill the above objects, the present invention provides a gluing mechanism and method for dispensing a glue onto predetermined positions at a gluing side of a long tape of tissue paper when the tissue paper is feeding through a winding machine. The gluing mechanism includes a glue dispensing roller oriented towards and located at a predetermined distance from the gluing side of the tissue paper; at least one gluing member located near a predetermined feeding path of the tissue paper to orient towards a contact side of the tissue paper opposite to the gluing side, and including a pivot end and an action end. A driving mechanism is connected to the pivot end of the gluing member for driving the gluing member to turn about the pivot end, so as to move the action end of the gluing member to a glue dispensing position oriented toward the glue dispensing roller or away from the glue dispensing position.
With the gluing mechanism and method for tissue paper winding machine according to the present invention, glue may be sufficiently, stably, and evenly applied to predetermined positions on a long tape of tissue paper being wound on a winding machine. In the gluing mechanism of the present invention, the tissue paper is passing through a space between a glue dispensing roller and at least one gluing member, and is pushed by the gluing member to touch the glue dispensing roller. Physically, the gluing member itself is not in contact with the glue, and the amount of glue applied onto the tissue paper is not affected by a turning speed of the gluing member. The gluing mechanism of the present invention also includes a driving mechanism for controlling the turning speed of the gluing member, so as to adjust the distance between the initial glue and the tail glue on the tissue paper. The driving mechanism drives the gluing member to turn in a predetermined rotation mode, so that the gluing member and the tissue paper contact with each other at a synchronized speed to avoid the generation of a tearing force that would break the tissue paper, and to increase the good yield of the tissue paper winding machine.
The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein:
Please refer to
The tissue paper winding machine 100 includes a pair of feed rollers 4, a machine frame 5, a perforation roller 51, a first winding roller 52, a second winding roller 53, a rider roller 54, a plurality of core support plates 55 (only one can be seen in the figure), a pinch roller 56, a plurality of arms 57 (only one can be seen in the figure), a belt 58, a conveyor 6, and a chute 7. The first winding roller 52 and the core support plates 55 together define a channel 50 between them. The channel 50 has a loading nip 501 and a narrowed passage 502. The arms 57 are downward extended to a lower surface of the first winding roller 52, each of which is provided with a protuberance (not labeled) that makes the channel 50 becomes narrowed.
Please refer to
The fender 13 is located near and above the glue dispensing roller 11 with one end 131 in light contact with the tissue paper 3, such that a predetermined space is normally kept between the glue dispensing roller 11 and the gluing side 31 of the tissue paper 3 to prevent the tissue paper 3 having glue dispensed thereon from adhering to the glue dispensing roller 11.
The gluing members 14 are located at a predetermined position near the feeding path of the tissue paper 3, and facing toward a contact side 32 of the tissue paper 3 opposite to the gluing side 31. Each of the gluing members 14 includes a pivot end 141 and an action end 142, and is connected at the pivot end 141 to a horizontal bar 144 via a plurality of supporting brackets 143, while the horizontal bar 144 is fixed to the machine frame 5. An elastic pad 145 is mounted to the action end 142 of the gluing member 14.
The driving mechanism 15 is connected to the pivot ends 141 of the gluing members 14 for driving the gluing members 14 to turn about the pivot ends 141 either in a first rotation direction I or in a direction reverse to the first rotation direction I, so that the action ends 142 of the gluing members 14 may be moved to a glue dispensing position A oriented towards the glue dispensing roller 11, or away from the glue dispensing position A. When the gluing members 14 are turned to the glue dispensing position A, the action ends 142 are driven to lightly touch the roller surface 111 of the glue dispensing roller 11. The driving mechanism 15 includes a motor 151 and a transmission means 152.
A winding nip 59 is defined between the first winding roller 52, the second winding roller 53, and the rider roller 54. The tissue paper 3 having a predetermined thickness and width is fed to the winding machine 100 via the feed rollers 4, and is moved through the perforation roller 51 to be perforated. Then, the tissue paper 3 is moved to bear against the lower circumferential surface of the first winding roller 52, so as to be wound around a first core 8 located in the winding nip 59 to thereby form a roll of paper 81 having a predetermined diameter, such as a roll of toilet paper. The perforation roller 51 is located near and above the first winding roller 52 to form a line of perforation across the tissue paper 3 at fixed intervals.
The tissue paper 3 is moved along the predetermined feeding path between the glue dispensing roller 11 and the gluing members 14. When the winding of the roll paper 81 on the first core 8 is about to complete, the gluing members 14 are driven by the driving mechanism 15 to turn, bringing the action ends 142 to locate at the glue dispensing position A. At this point, the tissue paper 3 passing through between the glue dispensing roller 11 and the gluing members 14 is lightly pushed by the action ends 142 of the gluing members 14 against the roller surface 111 of the glue dispensing roller 11, so that the glue on the roller surface 111 is dispensed onto the gluing side 31 of the tissue paper 3 to provide an amount of tail glue 16 thereon, as shown in
After the tail glue 16 is provided on the gluing side 31, the tissue paper 3 is further moved along the predetermined feeding path, as shown in
With the above-described gluing mechanism, the gluing members 14 do not contact with the glue in the process of dispensing glue onto the tissue paper 3, and there is always sufficient and evenly distributed glue on the roller surface 111 of the glue dispensing roller 11 for dispensing. The amount of glue dispensed onto the tissue paper 3 is not affected by a turning speed of the gluing members 14. The distance between the tail glue 16 and the initial glue 17 may be adjusted by controlling the turning speed of the gluing members 14.
The second core 9 is carried by one of many core carriers 61 of the conveyor 6 to the loading nip 501 of the channel 50 formed between the first winding roller 52 and the core support plates 55. At this point, a core inserter 62 of the conveyor 6 is automatically turned to push the second core 9 into the channel 50, as shown in
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The rider roller 54 is connected to an oscillable gripping arm 541. When the oscillable gripping arm 541 is oscillated about a rotary shaft 542 thereof, the rider roller 54 connected to the oscillable gripping arm 541 is driven to move upward and downward along an oscillating orbit (not shown) of the oscillable gripping arm 541. Please refer to
The rotation pathway in which the gluing members 14 are driven by the driving mechanism 15 to go through is now described with reference to
Thereafter, the gluing members 14 are driven by the driving mechanism 15 to turn an angle θ4 in the first rotation direction I and accelerate. Then, the gluing members 14 keep turning an angle θ5 in the first rotation direction I and are decelerated to a speed finally synchronize with the feeding speed of the tissue paper 3. The gluing members 14 keep turning an angle θ6 at this synchronized speed to get contact with the tissue paper 3 for a second time, so that the initial glue 17 is applied on the tissue paper 3 as shown in
Thereafter, the gluing members 14 are driven to turn an angle θ7 in the first rotation direction I and decelerate until they stop moving. Finally, the gluing members 14 are driven to turn an angle θ8 in a direction reverse to the first rotation direction I back to the initial position B to complete one operation cycle thereof.
Although the present invention has been described with reference to the preferred embodiments thereof, it is apparent to those skilled in the art that a variety of modifications and changes may be made without departing from the scope of the present invention which is intended to be defined by the appended claims.
Number | Date | Country | Kind |
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96127667 | Jul 2007 | TW | national |