Patent Grant
7404309
1. Field of the Invention
The present invention relates generally to series of machines or machine units which constitute a machine line, and more specifically to apparatus which forms part of the machines and which enables the line to be quickly switched between a first set-up wherein a first sized product is modified/manufactured and at least one other set-up wherein a different dimensioned product is modified/manufactured.
2. Background of the Invention
Necking machines have been used to form the neck on beer and beverage cans and the like for some time. These machines have evolved to the degree that reliable high speed precision necking is reliably realized. However, a drawback is encountered when switching from a run of one sized can to another, in that the downtime tends to be considerable. That is to say, the change-over requires the switching of an extensive number of elements and replacing them with new elements and/or re-adjusting current element to accommodate either the new diameter or length of the next can to be necked. Merely by way of example, with a change in diameter or neck profile, the current series of dies and knockout punches on each of the turrets needs to be changed. Transfer starwheels which temporarily hold, and then transfer cans to turret starwheels during their serpentine travel through the line or battery of necking turrets, need to be changed for a change in diameter and/or repositioned for a change in length, or both, if the can is both longer and different in diameter. The turrent starwheels likewise must be changed with a change in diameter.
The close proximity of the turrets and the serpentine path along which the cans are conveyed, introduces problems such that, merely by way of example, when it is necessary to change over the dies, only two or three of these dies are accessibly exposed at the top of the turret on which they are supported, the remaining dies remaining between or below the turrets and thus totally inaccessible to an operator. This necessitates that an operator or operators, charged with the task of changing over these elements, change those which are exposed and rendered accessible, and then jog the machines to rotate the rotatable elements on each of the turrets to positions wherein the next two or three elements are rendered accessible. These dies are usually attached with a threaded collar and require a number of rotations to thread/unthread. This of course is inevitably carried out by hand.
In the event that twelve elements are carried per turret and there are 12-14 turrets involved in the necking process, no less than 168 operations are necessary. Thus, if it takes, for example, just 3 minutes on average to release one die and replace it with another and secure the new die in position, it will take at least 8 man hours to simply change over the dies on the aligned series of turrets. Accordingly, as will be understood, any change in change-over time is multiplied significantly.
Of course, this is merely the tip of the iceberg and, at least in addition to the above, it is necessary to replace/relocate (in the case of a change of diameter/length) the starwheels which respectively transport and position the cans for the sequence of necking operations necessary in order to achieve the required neck profile. It is also necessary to painstakingly set each of the can handling starwheels with respect to those on either side, so that can hand-off is carried out precisely and smoothly and without damage to cans.
Thus, to be able to reduce this non-productive labor intensive downtime, is highly desirable.
In order to quickly change over from the production of one type of can to another wherein the new can features one or more of a different diameter, length, neck profile, the machine line which comprises a series of turret machines incorporates apparatus (devices/arrangements) which reduce the number of operations/time necessary to condition the line to the degree that a new set up is achieved.
For example, in order to accommodate a can having a different length, either the turret which is configured to carry the rams which carry/drive the push plates, or the turret which carries the dies/knockout rams, is arranged to be movable with respect to the corresponding turret which carries the other of the push plate/rams, and dies/knockout rams. This allows the movable turret to be moved toward or away from the other (the stationary turret) to allow for the difference in length and obviates the need to change each of the push plates to allow for the different length can. This immediately reduces 10-16 time consuming operations per turret machine.
Further, in this embodiment, the turret starwheel is comprised of two individual segments. Each segment is carried on a different turret so that, as the movable turret moves with respect to the stationary one, the distance between the two turret starwheel segments automatically adjusts and at least the need to interchange the turret starwheel and/or make any changes in connection therewith (in connection with a change in can length) is obviated. The lower guide which is associated with the turret starwheel segment that is associated with the movable turret, needs to be released and slid along its support shaft and then re-secured in a suitable position with respect to the movable segment of the turret starwheel. This lower guide is designed to facilitate the transfer of the cans which are carried on the transfer starwheels to the next turret starwheel.
In the case that the change in length of the can is such that the cans are longer and the center of gravity of the cans becomes located appreciably outside of the width of the transfer starwheels (which transfer cans between necking machines/modules), instead of replacing the transfer starwheels per se, an embodiment of the invention is such that the transfer starwheel is formed of first and second segments which can be secured together in a face-to-face relationship. To increase the width of the transfer starwheel, the second segment of the transfer starwheel is swapped for one which is wider and such as to renders the total width of the transfer starwheel such that the center of gravity of the can falls within its width and/or within normal transfer parameters. The first segment remains secured in place, obviating, for reasons that will become more clearly appreciated hereinlater, any need for inter-starwheel positional adjustment. This increase in width maintains the stability of the cans with respect to the centrifugal force which is applied as the transfer starwheel rotates and prevents can wobble and/or cans being lost from the transfer line.
In order to secure the cans in position when they are rotated to a position which is located below the axis of transfer starwheel rotation, the second transfer starwheel segment is provided with channel portions in the bottoms of the can receiving recesses or pockets, that are configured to register (viz., mate) with those formed in first or base segment. This provided an arrangement whereby the channels which function in a manner similar to “octopus suckers” are simply elongated or lengthened, thus allowing the application of suction along an elongated recess and stably holding the can in position.
In the case of a change in diameter, it is necessary to change both the transfer starwheels and the turret starwheels to ones which have can receiving recesses with the appropriate radii. In the past, this change over has required, as noted above, that each transfer starwheel and turret starwheel to be located with great precision with respect to the next so that the cans will be smoothly transferred from one wheel to the next and will be not be damaged or misshapen and will be positioned to be appropriately pushed into the necking dies. To speed up this process and to eliminate the need to re-synchronize all of the transfer starwheels and the turret starwheels with one another, timing plates are secured to the shafts which carry the transfer starwheels and the turret starwheels, and are precisely set with respect to one another. Thus, when the transfer starwheel and the turret starwheels are mounted on the respective timing plates, they are precisely located with respect to one another in the required manner and the need to adjust the rotational angle of one with respect to another is obviated. The turret starwheels are formed in two halves so that the can may be disposed in position about a main drive shaft which interconnects the movable and stationary turrets.
The timing plates are configured to have positioning pins (e.g. dowels) and the transfer starwheels and turret starwheels are formed with bored/reamed holes which are in precisely the same positions on each starwheels. Thus, after the first timing plate set up on each of the battery of turret modules, all that is necessary is to switch starwheels and bolt them in place. This eliminates the need to use can sized synchronizing tools/jigs which are conventionally used to locate the starwheels so that they are secured in position suitable for can hand-off/transfer.
In the case of a change in diameter, it is also necessary to change the dies and knockout punches. Conventionally, the dies are secured in position using threaded collars which are threaded and unthreaded by hand. It goes without saying that effecting the change by manually loosening and rotating each threaded collar of the old dies to the degree necessary to unthread each collar from its operative position, locate each new dies in position and then securing the new dies in position by again manually rotating a threaded collar into an operative position, is a time consuming task. This task is made doubly difficult in that, as it is done by hand, care must be taken not to drop the collars during this process.
An embodiment of the invention overcomes this by using pivotal clamps which each require only a single bolt to be loosened or tightened. This tightening/loosening can, of course, be carried out using a suitable power tool such as a pneumatically or electrically operated power tool. In accordance with this embodiment of the invention, each of the clamps is arranged to have two arcuate sections which each engage a portion of flanges on a pair of adjacent dies.
In an alternative embodiment, the clamp is not pivotally mounted and is removable. In this embodiment the clamp is held in position using one or more bolts. While both of these embodiments have two arcuate die engaging surfaces each, the invention is not so limited and it is within the scope of the inventive embodiments to have only one arcuate die engaging surface.
With the pivotal clamp embodiment of the invention, it is possible, by sliding the two dies into position, pivoting the clamp into position and then tightening a single bolt, which is accessibly located between the two dies, two adjacent dies can be secured in position. This, as will be best appreciated from
In accordance with an embodiment of the pivotal clamps, the clamps are each provided with their own detent so that when they are released they can each be rotated back and temporarily held in the released position by the detent. This feature is such that when removing one set of dies, the cramped operating space renders it impossible to actually gain access to more than about three dies at a time. Thus, it is necessary to jog the turrets to rotate the next set of dies to a position wherein they are exposed to the degree that removal is enabled. To prevent confusion, as the dies are often the same or similar color, it is often preferred to remove all of one set of dies before disposing the new units in position. The detents permit the clamps to be pivoted and snapped into open positions which allow the turrets to be partially rotated (jogged) without fear of the clamps swinging out under the influence of the centrifugal force which is produced, and interfering with adjacent equipment in a manner which invites damage/breakage to either or both.
The infeed and discharge devices at the ends of the line need to be adjusted with respect to can length when the length of the can to be processed, is changed. Embodiments of the infeed and discharge arrangements facilitate this adjustment and are such that two halves of the structure include shafts on which they are mutually supported and along at least one of which the halves are slidable. Collars through which the shafts extend and which are supported on the structures (halves) can be selectively tightened/released such as through the use of a portable power tool, to allow for reconfiguration of the devices and to allow the width of the devices to be adjusted with respect to the length of a can which is about to be processed (necked).
In more specific terms, a first aspect of the invention resides in a machine arrangement comprising: a plurality of machines arranged to cooperate with each other in a manner which comprises a machine line; apparatus means associated with and/or comprising part of the machines for: at least one of moving, holding, manipulating and shaping cans as they pass from a can infeed to a can discharge of the machine line and move along a path having a predetermined configuration, and for minimizing operations necessary for changing from a set up suitable for modifying a can having a first set of dimensions to a set up suitable for a can having a second set of dimensions.
In the above machine line, the machines each comprise first and second turrets, and the apparatus means comprises: means for moving one of the first and second turrets with respect to the other whereby a distance between the turrets is adjustable with respect to a length of a can which is to be necked.
In this machine arrangement, the means for moving comprises a position adjusting drive mechanism which is selectively operable to reposition one of the first and second turrets with respect to the other. In one embodiment, the means for moving comprises a table immovably fixed to a machine chassis, the table cooperating with the drive mechanism so that the drive mechanism moves the support member along the table. The support member includes a locking mechanism for locking the support member to the table once suitable repositioning is achieved.
The above machine arrangement is such that one of the first and second turrets supports one of a) push plate and ram arrangements and b) necking dies and knockout ram arrangements, while the other of the first and second turrets supports the other of the a) push plate and ram arrangements and b) necking dies and knockout ram arrangements. The apparatus means, in this instance, comprises a turret starwheel arrangement which supports cans in a predetermined operative positions with respect to the first and second turrets and which, in one embodiment, comprises first and second separate segments which are respectively supported on the first and second turrets so that, as the distance between the first and second turrets is adjusted with respect to the length of a can to be necked, the distance between the first and second segments is simultaneously changed.
In this arrangement the predetermined operative positions are positions wherein they are aligned with respect to the a) push plate and ram arrangements and b) necking dies and knockout ram arrangements.
In a further embodiment, the apparatus means comprises a plurality of dies which are slidably disposed in position on a turret structure and a plurality of clamps which are secured to the turret structure by way of a plurality of bolts, each clamp having an engagement surface which engages a portion of each die and holds the dies on the turret structure. In a preferred embodiment, the plurality of clamps are each pivotally supported on the turret structure. This eliminates the possibility of droppage/loss and reduces the number of parts the operators are required to keep track of during the set up change.
Each of these pivotal clamps has a detent to hold the clamp in an open position wherein it is pivoted away from a position wherein the clamp holds at least one die in position on the turret structure. This conveniently secures them in place in the manner noted above. Each of the clamps is held on the turret structure by the above mentioned bolts.
In the above mentioned machine arrangement, each machine has at least first and second parallel, synchronously contra rotating shafts which respectively support a turret starwheel and a transfer starwheel. The turret starwheel and the transfer starwheel are arranged to pass cans therebetween and move the cans along a part of the path having the above-mentioned predetermined configuration. In this embodiment, the apparatus means comprises first and second timing plates or hubs wherein the first timing plate is associated with the first shaft and the second timing plate is associated with the second shaft.
Each of these timing plate is positionally adjustable with respect to, and then secured in place, on the shaft with which it is associated. The first timing plate interconnects one of the above-mentioned first and second turret starwheel segments with the first shaft while the second timing plate interconnects the transfer starwheel with the second shaft. The other of the first and second turret starwheel segments is connected directly to the first shaft without the interposition of a timing plate. This directly connected segment acts as a reference with respect to which the second segment and the transfer starwheel are timed.
These timing plates, once adjusted and fixed in their respective positions on the respective shafts, are such that the turret starwheel and the transfer starwheel can be respectively interchanged with a different turret starwheel and a different transfer wheel, and the positional arrangement of the timing plates on the shafts causes the positional relationship between the interchanged turret starwheel and the interchanged transfer starwheel to be the same as the positional relationship between the turret starwheel and the transfer starwheel before the interchange. This allows currently used starwheels to be removed and those having different diameter pockets to be mounted in position without any need for any time consuming positional adjustment.
Another embodiment is such that each of the previously mentioned machines has a drive shaft which supports an interchangeable starwheel that is configured to transport cans along a part of the path having the above-mentioned predetermined configuration. In this instance the apparatus means comprises a timing plate which is associated with the drive shaft. The timing plate is positionally adjustable with respect to, and then secured in place on, the drive shaft, and configured to connect a first interchangeable starwheel to the shaft in a manner wherein, when the first interchangeable starwheel is changed with a second interchangeable starwheel, the second starwheel assumes the same angular rotational relationship with respect to the drive shaft as the first starwheel which it replaces.
In the above mentioned embodiment, the second starwheel has can receiving recesses which are different in diameter with respect to the can receiving recesses of the first starwheel.
Further, each of the interchangeable starwheels comprises first and second segments. More specifically, the above mentioned machines each comprise first and second turrets and the first and second segments comprise separate segments of a turret starwheel arrangement where the first and second segments are respectively associated with the first and second turrets.
In one embodiment, the first and second segments are connectable to form a single unit. A plurality of add-on/replacement second segments are available. Each have a different width and an appropriate one can be selected in order to adjust a width of the single unit.
The first segment has a plurality of equidistantly spaced can receiving recesses about its periphery. Each recess is formed with a first portion of a vacuum channel. Each second segment is formed with a second portion of the vacuum channel. With this arrangement, each vacuum channel is completed when the first and second segments are secured together and the first and second portions of the vacuum channel are brought into register with one another.
Infeed and discharge devices are disposed at the upstream and downstream ends of the machine line. In this instance, the apparatus means comprises the infeed and discharge devices each comprising first and second halves which are operatively interconnected with one another so as to be selectively slidable toward and away from one another. In a specific embodiment, the two halves of each of the infeed and discharge devices are movably supported on each other by way of a plurality of shafts. Collars, such as split collars, through which the shafts extend, are fixed to the two halves and arranged to be selectively tightened/released to allow for the ready reconfiguration of the infeed and discharge devices.
The above machine arrangement includes an embodiment wherein the machines comprise at least in part, a plurality of machine modules and/or a plurality of machines which are mounted on a common chassis.
A further aspect of the above mentioned machine arrangement resides in that the first turret is moveable with respect to the second turret and wherein the first turret comprises: a cam support member; a cam supported stationarily on the cam support member; a support block which is rotatable with respect to the cam and connected with a drive shaft which operatively interconnects the first and second turrets for synchronous rotation therewith. In this instance, the apparatus means is embodied by a position adjusting drive mechanism which is selectively operable to reposition the first turret with respect to the second turret, and a shaft adjusting tool, which interconnects the cam support member and the support block during repositioning so that during repositioning when the first turret is moved with respect to the second turret by the position adjusting drive mechanism, the spatial relationship between the cam support member and the support block remains unchanged.
Another aspect of the invention resides in a lubricating arrangement for a movable turret of the above-mentioned nature. This lubricating arrangement includes an inlet port, an outlet port and a helically coiled tube fluidly interconnecting the inlet and outlet ports. The inlet port is formed in an axially stationary shaft which is driven to rotate and which extends essentially the length of the turret arrangement. The support structure on which the one of the push plate/ram arrangements and die and knockout ram arrangements are supported, is splined to the shaft for synchronous rotation therewith. The outlet port is associated with the support structure to supply lubricant to the one of the push plate/ram arrangements and die and knockout ram arrangements. The helically wound tube is disposed around the shaft. The shaft has a coaxial bore through which lubricant is supplied to the inlet port. The inlet port is formed in the shaft at a position which is located so that the movable turret is permitted to move between first and second travel limits along the shaft, and so that the helically wound tube stretches/contracts in a manner which maintains fluid communication between the inlet port and outlet port during movement between the first and second travel limits.
The cam support member in at least one embodiment houses a bearing that supports one end of a turret drive shaft which extends between the fixed and movable turrets in a manner which allows the cam support member to move axially with respect to the turret drive shaft. The movable turret further comprises a support block which is rotatable with respect to the cam and the cam support member, the support block being selectively connectable to the turret drive shaft for synchronous rotation therewith. In this embodiment, the support block is configured to support can necking apparatus which is operatively connected with the cam in a manner which induces reciprocal motion therein when the support block is rotated with respect to the cam. The can necking apparatus, in this instance, exemplarily comprises one of a plurality of push plate/ram arrangements and a plurality of die and knockout ram arrangements.
A further aspect of the invention resides in a method of quickly changing a product modification set-up comprising: color coding a plurality of parts which form a series of machines that cooperate to define a machine line, and which parts, at least in part, need to be changed/adjusted in order to change from one product modification set-up to another product modification set-up; changing color coded parts in accordance with the dictates of a change in dimensions of an item to be produced by the series of machines and thus effecting a change in product modification set-up.
Yet another aspect of the invention resides in a starwheel for use with a can necking machine comprising: a first segment configured to be connected to a drive shaft; a plurality of second segments each configure to be connectable to the first segment, each of the plurality of second segments having a different width so as to be selectable to produce, when connected to the first segment, a total width suitable for supporting a can having given length and diameter dimensions. The first segment in this instance has a plurality of can receiving recesses formed about its periphery, each of the recesses having a first channel portion formed in the bottom thereof, each of the first channel portions communicating with a source of negative pressure. Each second segment has a plurality of can receiving recesses formed about its periphery which are configured to register with the can receiving recesses formed in the first segment, each second segment having a second channel portion formed therein, each second channel portion being configured to register with a first channel portion and define a complete channel.
In this embodiment, the starwheel is a transfer starwheel which transfers cans from or to a turret starwheel associated with first and second turrets which are configured to support one of a) push plate and ram arrangements and b) necking dies and knockout ram arrangements respectively. The first turret is movable toward and away from the second turret and the turret starwheel comprises first and second separate turret segments wherein the first turret segment is operatively supported on the first turret and the second turret segment is supported on the second turret.
An additional aspect of the invention resided in a clamp for use with a can necking machine comprising: a pivotal member pivotal between a clamping position and a release position, the pivotal member having at least one arcuate clamping surface configured to engage a die and to secure the die in position on a die block. A mounting bracket is configured to be fastened to a die block. This bracket is configured to support the pivotal member so as to be pivotal about an axis. A fastening bolt is rotatably received in a through bore formed in the pivotal member and configured to thread into a tapped bore formed in one of the die block and a clamp mounting bracket secured to the die block, the through hole being configured to allow pivotal movement of the bolt in a manner wherein an axis of the bolt is pivotal through an angle which lies on a plane normal to the pivot axis about which the pivotal member is pivotal.
A further aspect of the invention resides in a timing plate for use in a can necking machine comprising: a plate which is configured to support a starwheel which transfer cans through the necking machine, the plate being adjustably connectable to a drive shaft associated with the starwheels so as to enable a starwheel to be replaced with another and to cause the another starwheel to assume exactly the same positional status as that which it replaces.
A yet further aspect of the invention resides in a method of changing a can necking machine line from a first can necking set up to a different can necking set up wherein the machine line comprises machines having a first turret which supports one of push plate and ram arrangements and die and knockout ram arrangements and a second turret which supports the other of the push plate and ram arrangements and die and knockout ram arrangements, which comprises the steps of: adjusting the set up for a change in can length by moving the first turret with respect to the second turret, and adjusting a distance between the push plates and the dies in accordance with a length of a can to be necked.
This method further includes: connecting a first turret starwheel segment to the first turret and connecting a second turret starwheel segment to the second turret so that a distance between the first and second starwheel segments turrets changes with a change in distance between the first and second turrets.
Another aspect of this method resides in synchronizing the rotational relationship between the first and second turret starwheel segments and transfer starwheels located on either side of the turret starwheel by: using timing plates which operatively interconnect the turret starwheel and transfer starwheels to their respective drive shafts, securing the timing plates to the respective drive shafts when the desired synchronization between the turret starwheel and transfer starwheels is achieved to allow turret starwheel and transfer starwheel replacement without the need again synchronize the turret starwheel and transfer starwheels again.
In addition to the above, it is also possible to adjust the width of a transfer starwheel by operatively connecting a first segment of the transfer starwheel to a transfer starwheel drive shaft, and connecting a second segment selected to have a width selected in accordance with a length of a can to be modified, to the first segment.
The above method can also include modifying the length of a vacuum channels formed in the transfer starwheel by forming a first channel portions in the first segment and second portions in the second segment and combining the first and second channel portions to form closed channels which can be elongated with the combined width of the first and second segments of the transfer starwheel.
Another aspect of the invention resides in a method of clamping necking dies in their respective operative positions using a clamp member and tightening the clamp by tightening a bolt. This includes mounting a mounting bracket on a block on which the die supported, and securing the clamp member to the mounting bracket using the bolt. In addition, the method features pivotally supporting the clamp on the bracket and holding the pivotally supported clamp in the open position using a detent.
The various aspects and advantages of the embodiments of the invention will become more clearly appreciated as a detailed description of exemplary embodiments is given with reference to the appended drawings in which:
As shown, the cans enter the line via a can infeed 104 and are picked up by a first transfer starwheel 140′. The cans which are held in position on this first transfer starwheel 140′ using a pneumatic pressure differential or “suction” as it will be referred to. Further disclosure of this first starwheel will given hereinlater.
The cans are then passed from the first transfer starwheel to a first turret starwheel 142′ and enter into the first stage of necking on the first necking machine 100. While the invention is not so limited, embodiments of the invention are such that necking machines 100 are constructed as modules 110. An example of such a module is shown in
It should be noted that
In accordance with a first embodiment of the invention, the outboard turret 112 (or movable turret as it will be referred to) is located distal from the end housing 113, and is supported on the base frame or chassis 115 of the turret module so as to be axially movable toward and away from the inboard turret 114. This allows the movable turret 112 to be repositioned with respect to the other (viz., the inboard or fixed turret 114) and for the distance between the two turrets 112, 114 to be adjusted and thus allow for a change in the length of the cans to be necked. This movement eliminates, merely by way of example, the need to modify/replace the push plates that would otherwise be necessary in order to allow for the difference in can length.
In accordance with the embodiments of the invention, the push plate and ram arrangements 116 can be supported on either the movable turret 112 or the fixed turret 114 and that the corresponding necking dies and knockout ram arrangements 118 can be supported on the other of the turrets. For example,
The necking machine embodiments, irrespective of the above mention disposition of the push plate and ram arrangements, are such that a drive shaft 120 extends through both of the turrets 112, 114. The “outboard” end 120A of this “turret” drive shaft 120 is supported by way of a bearing 122 supported in a cam support member of the outboard turret 112. Since this turret 112 is required to be axially movable and the drive shaft 120 axially immovable, the bearing 122 is arranged to either slide within the cam support 124 or the bearing 122 is stationarily supported in the cam support 124 and the drive shaft 120 is adapted to slide through the bearing 122 in a manner which allows the movable turret to be moved within its travel limits. In the illustrated embodiments, the former arrangement is used.
A cam 126 is supported on the inboard face of the cam support 124. As shown, both the cam 126 and cam support 124 are, in the illustrated embodiments, basically hollow and remain stationary during necking operations. In
In as much as the ram block 128 is movable with respect to the chassis, in order to supply lubricant the push plate and ram arrangements 116, the drive shaft 120 is formed with a coaxial bore 120B and a radial passage terminating in port 120C. A helical tube 121 which is disposed about the drive shaft 120 in the manner illustrated in
In the embodiment shown in
The cam support 124 (shown in
When moving the cam support 124 along the chassis 115, the cam 126 and the block (either the ram block—
In order to achieve this, a shaft adjusting tool 150 of the nature shown in
By suitably rotating the support block (128, 129), it is possible to bring this bore into position wherein the first and second engagement members can be inserted into the respective bores. In the illustrated embodiment, the shaft tool 150 is provided with locking elements 152A, 154A which respond to rotation of the knobs 152B, 154B in manner which temporarily locks the ends of the engagement members in their respective bores.
With the shaft tool disposed in and locked place in the manner illustrated in
A tool or spacer (not shown) interposed between a selected push plate and the corresponding die, can be used to gauge when the movable turret 112 (in this case the cam support 124, the cam 126 and the support block 128/129), has been moved to an appropriate position with respect to the fixed turret 114, for necking the next can size. When the movable turret 112 is suitably positioned for the new can size, the cam support 124 is locked in position on the chassis 115. The shaft tool 150 is then released and removed and lastly the support block (128/129) is secured to the turret drive shaft 120 to prevent axial displacement during operation.
Merely by way of example, the locking arrangement can take the form of an expansion device which responds to the rotation of a bolt forming part thereof, and snugly engages a part of the track formed in the table 124B. However, the embodiments are not limited to this particular arrangement and any suitable releasable clamp can be used to securely lock the main body of the cam support 124 and the table 124B together.
A drive mechanism 134 is operatively connected with the end of the turret drive shaft 120. A gear 136 on the end of drive shaft 134 is placed in drive connection with a gear 137 on the end of a transfer drive shaft 138. An example of this type of drive shaft is shown in
In the machine line 102, there is, in effect, a transfer starwheel disposed on either side each of each turret starwheel 142 in the manner depicted in
Each of the turret starwheels 142 are formed as two separate elements or “segments” 142A, 142B (see
One of the two segments 142A and 142B of each of the turret starwheels 142 (in this case each of the segments 142A, which is supported on the adjustable turret 112 end), is connected to the drive shaft by way of a timing plate 144 (see
This, of course, requires that each of the mounting stud receiving bores in each of the starwheels be drilled/formed in exactly the position. However, once the timing plates 144 are all set to synchronize the respective starwheels with respect to one another, the need to repeat this set up is obviated and any subsequent change from one run to another is facilitated as a result.
The above type of timing plate 144, is used to mount each of the transfer starwheels 140 to the ends of the transfer drive shafts 138. However, in this case, the transfer starwheels 140, while also being formed of two segments 140A and 140B, are such that the segments are configured to be snugly connected to one another. The first or base segment 140A of each transfer starwheel 140 is mounted on the timing plate 144 while the second portion or segment 140B is secured to the first portion 140A. This allows for a second segment 140B, having the appropriate width, to be selected from a plurality of second segments (each of which have a different width) in a manner wherein the total width of the complete transfer starwheel 140 can be set in accordance with the length of the can which is to undergo necking.
The above construction also pertains the first transfer starwheel 140′.
As noted above in connection with the first transfer starwheel 140′, the transfer starwheels 140 are arranged to hold the cans in position using suction. However, in order to stably hold longer cans in position with the above two-part type transfer starwheels, it is necessary to lengthen a channel, formed at the bottom of each of the can receiving recesses, in accordance with the change in width of the transfer starwheel. This channel, in effect acts in a manner similar to an “octopus sucker.”
The disclosed transfer starwheel embodiments achieve this requirement by simply providing portions 140C1, 140C2 of the channel in both of the first and second segments 140A, 140B of each of the transfer starwheels 140′, 140. Thus, when the two segments 140A, 140B are secured together the channel portions 140C1, 140C2 register with one another and a complete elongated channel is formed. Thus, by having a vacuum port 140Vp formed in each of the first channel portions 140C1 and fluidly communicating each of these ports with a source of vacuum (negative pneumatic pressure) via a suitable manifold 146, the vacuum which is supplied into the first channel portions 104C1 is delivered instantly into the second portions 140C2 and the surface area of the cans which are exposed to the suction, is increased to the degree that it is stably held in position as it passes below the transfer starwheel axis of rotation.
In the case of a short can, the second segment 140B can approximate a flat plate which closes the end of the channel portions 140C1.
As will be appreciated from the figures showing these embodiments, one end of each of the shafts is connected to a frame half while the other is configured to slide through a split collar which is fastened to a half. The collars comprise split collars 104SP having one portion fastened to a housing/structural member of the two housing halves. By releasing the collars, the two housing halves can be slid along the shafts 104A. 148A until the separation is suitable for the length of the can which is to be fed into/discharged from the machine line 102. Simply retightening the split collars SP locks the can infeed and can discharge structure in a suitable condition for feeding the cans into and out of the line.
A further quick change enabling embodiment, resides in a clamp 160 which facilitates changing of the dies 161 on each of the die and knockout ram arrangements 116. In this embodiment, the die and knockout ram arrangements 116 are configured so that the dies 161 can slid into place and are free of screw threads and the like.
With the pivotal embodiment of the clamp 160, the pivotal members 166 can be flipped back to positions such as shown in
As will be appreciated from
Accordingly, a detent or click stop 168 (see
In the illustrated embodiment, the pivotal member 166 are each held in place by a single bolt 170. This is placed in a position to readily tightened/loosened using a power tool. However, due to the pivotal nature of the pivotal member, as the bolt approaches the threaded bore (see
Returning now to
Referring now to
Although only a limited number of embodiments have been disclosed it is submitted that the various modifications and changes that can be made by those skilled in the art to which the claimed subject matter pertains, or most closely pertains, when equipped with this disclosure, will be essentially self evident, and that the scope of the invention is limited only by the appended claims.
This application claims priority to Provisional Application No. 60/628,562 filed on Nov. 18, 2004, the entire content of which is hereby incorporated by reference thereto.
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