DE1056495B - Device for manufacturing bottle caps - Google Patents

Description

The invention relates to a device for the intermittent feeding of strip material, in particular from strip material to manufacturing masks for bottle caps from one. Metal foil strips that are placed on areas of the caps to be produced from it with them at equal intervals Repeating imprint patterns or the like. Is provided.

When producing bottle caps with a printed surface, the printing is considered to be repetitive Pattern applied along a metal foil used to manufacture the caps by the machine hindunch. The machine cuts the film or smooths and forms the film into caps. It It is necessary that the imprint corresponds exactly to the finished cap, and that the film is stretch and possibly slip during the feed, means must be automatic Control of the supply may be provided, which eliminate the errors that would otherwise arise when molding the cap by not matching the print with the cap. Similar problems arise with feeding printed strips of paper or other material on which printed or other Have markings and must be kept synchronous with the running of the machine.

The object of the invention is to provide a mechanism for adjusting the tape feed for to maintain the required consistency.

Accordingly, the invention is characterized by any irregularity in correspondence between the tool for forming the caps and the printed cap areas on the Slide-determining device that controls the control elements in the event of irregularities being detected of the strip feeder to deal with these irregularities by changing the stroke length of the to correct intermittent strip feed. This eliminates any inaccuracies in the strip feed, which can still occur despite extensive centering devices, automatically determined and then also automatically corrected immediately via appropriate control means, without observation of the machine and any manipulation are required.

In an advantageous embodiment, a sliding pusher moves a connecting rod to accelerate, or delaying the feed by means of a lever pivoted about a pivot during a deflection or stroke depending on the response of a locking device on synchronization marks, perforations or the like on the strip as soon as it runs through the machine.

Device for manufacturing
of plastic caps

Applicant:

Fords (Finsbury) Limited,
Kempston, Bedford (UK)

Representative: Dr. H. Wilcken, patent attorney,
Lübeck, Breite Str. 52/54

Claimed priority:
Great Britain 29 September 1954

Geoffrey Ewart Ford and Philip Sidney Waite,

Kempston, Bedford (UK),

have been named as inventors

For example, a photocell can be provided on "markings or" spaced along the strip Respond perforations so that a signal pulse is generated during each feed stroke, its Point in time with means, e.g. B. a Umschakeinriehtung is compared, which is dependent on time from the machine is working. If the signal pulse occurs before the correct time for a stroke, he operates a mechanism to bring the connecting rod slide closer to the pivot bring and delay the supply during this stroke, whereas if the signal pulse is in the If period occurs late, the mechanism pulls the slide of the connecting rod from the pivot shifted away to increase the feed during this stroke. The timing of the Signal pulse therefore controls the feed during the respective stroke in which it occurs.

Manually operated means are advantageously also provided to make the strip feed independent of 'the automatic setting'. These additional funds can be used during the Can be operated while the machine is running. The manually operated means with display and measuring

Arranged in such a way that a predetermined manual adjustment is possible.

For a better understanding, the invention is illustrated by the drawing, in which an exemplary embodiment is illustrated, explained. It shows

90 »508/256

FIG. 1 is a side view of a cap making machine with a feed mechanism according to FIG the invention,

FIG. 2 is a side view of the machine according to FIG. 1 on an enlarged scale, in which the outer Housing parts have been removed,

Figure 3 shows a portion of the preprinted strip produced by the feeding mechanism of the invention is supplied,

4 shows a measuring unit for a feed length,

Fig. 5 schematically shows the circuit of the electrical control means.

The cap punching and forming machine 1 according to the drawing is used for punching and shaping Bottle caps made from a strip of an aluminum trap can be laminated with paper, and intermittently or runs intermittently through the machine. The film 2 is on there at constant intervals its length provided with printed surface parts (Fig. 3), where it is to be punched out and shaped. There are also synchronization marks along the side edges of the film at constant intervals 4 printed on it. These markings generate when passing a photocell unit 50 Signal pulses used to control the strip feed and to maintain consistency used between the printed Flächenteikn 3 of the strip and the punching tool of the machine if, between, the successive strokes stand still. As the photocell unit does not form part of the invention per se and can be designed in any way, it does not need any further details to be described. In general, however, it consists of a photocell 48 (Fig. 5) in a housing, which is arranged so that it receives reflected light from the film surface, which from an electrical Lamp 49 is emitted, which is arranged in. A housing, and which through a Slit of the housing falls on the slide. The photocell is shielded from the direct light of the lamp. The film is passed through the machine by means of toothed rollers or wheels 5, which by a Gear wheel. 6 are driven. The gear wheel 6 is by a freewheel or by a just in one direction driving drive, z. B. by a known wedge roller arrangement of a disc 7, driven; which is mounted coaxially with the gear wheel 6. It should be noted that the drive of the Gear wheel 6 in itself does not form part of the invention and is therefore not shown in order. which overlooks not to be confused in the drawing. The disc 7 makes a back and forth movement, to cause the rollers 5 to be driven intermittently by means of a connecting rod 8, the opposite end of which with a sliding valve 9 of an oscillating, in the machine frame is connected at point 11 rotatably mounted lever arm 10. The arm becomes, 'through the connecting rod 12 driven to oscillate, which is driven via a crank pin 13 of the disk 14. The disk 14 is in turn by the machine in a time-dependent manner from the punching tool in Rotation offset so that the strip 2 advances during part of the machine period and during the punching process is at a standstill. The stroke of the crank pin 13 can be used for initial adjustment the required strip feed can be adjusted.

The slide 9 is movable in the direction towards and away from the pivot 11 on a rod 15, which is carried by the lever arm 10 and is moved by a link 16, one end of which is rotatable is connected to one end of the slide valve 9 and the other end to a control arm 17, either at the point 18 directly in the machine frame or via an auxiliary link, as described below is described, is pivotably mounted. When the control arm 17 is in its neutral position, the slide 9 is in the middle of the rod 15, and the pivot point between the joint 16 and the control arm 17 is in a line with the pivot point 11. By lifting the left At the end of the control arm 17 (see. The drawing), the slide valve 9 moves further away from the Pivot point 11, whereby the stroke of the connecting

* 5 rod 8 and the indexing of the rollers 5 increases, whereas the stroke is reduced-, when the left end of the control arm 17 is lowered. The movement of the control arm can be done by anyone Hub_ an increase or decrease in the strip feed of z. B. ± 0.08 mm!

The left end of the control arm 17 is normally held in its neutral position by a roller 19, which engages in a V-shaped incision 20 of an arm 21 which, in the machine frame at point 22 is rotatably mounted and is pressed against the tube 20 by a spring 23.

The raising or lowering of the S expensive poor 17 is carried out by a double-armed cam 24, the driven by a chain 25 from the shaft of the disk 14 at half the speed of the disk 14 will. The cam vanes cooperate with the ends of fingers 26 and 27, which are at the points 28 and 29 are pivotable on the control lever 17 and by small springs or by their weight in the Position according to the drawing. The control arm 17 also carries two relays 30 and 31, whose armatures 32 and 33 grip behind the outer ends of fingers 26 and 27 when the relay is energized are, and therefore prevent their pivoting about their pivot pins 28 and 29. When the relays are switched off, the armature release the ends of the fingers so that as soon as the cam 24 rotates, the wings of which move the fingers 26 and 27 without actuating the control arm 17. As soon as however a relay is energized, e.g. B. the relay 30, the armature 32 is attracted to block the finger 26, so that the cam wing then lifts the control arm 17 as soon as the cam wing passes the finger 26. Conversely, when relay 31 is energized, cam 24 will depress control arm 17. the Movement of the control arm causes the roller 19 to move out of the bottom of the V-notch 20 and to tension the spring 23. The control arm 17 is through the spring 23 and the incision 20 in, his neutral position 'Returned as soon as the cam vane comes out of engagement with the finger 26 or 27. .

Through the chain25 throws at the same speed

Like the disk 14, a cam 34 is also driven, which is provided to lift a central contact 35 from a spring contact 36, against which the former is normally located, and to bring it into abutment against another spring contact 37 on the opposite side. As shown schematically in FIG. 5, the contacts 36 and 37 are connected to the control electrodes 39 and 40 of two thyratrons 41 and 42 of an electronic control device, and the center contact 35 is connected to the output electrode 43 of the photocell 48. If the synchronizing signal pulse of the photocell 48 is ^{generated in the same:} Eye view in which the

Center contact 35 is open and is not in contact with one of the side contacts 36 and 37, there will be no Thyratron ignited. But if this signal pulse occurs earlier or later in the machine period, so it will flow through one of the contacts 36 or 37 in the d ignite the corresponding thyratron. After ignition the thyratrons actuate the relays 44 and 45 in their anode circuits, which in turn actuate the relays 30 and 31 to control the control arm 17. The cam 34 then operates one during its period further switching contact 38, which the anode circuit of the thyratrone 41 and 42 with each revolution opens, so that at the appropriate moment of each revolution a thyratron, which has previously ignited is cleared during the same period, so that the control arm 17 during the next machine period is not pressed it. unless one or the other of the thyratrone is re-ignited.

The thyratrons are fed by a power source, indicated schematically at 46, which is also used for The photocell 48 and its associated lamp 49 are fed. It is understandable that the circuit 5 is a schematic and is only an illustration of many possible arrangements. In practice, many other components can be used depending on the working characteristics the thyratrone and relays, which are chosen at the discretion of the user.

The thyratrone and the associated parts can be accommodated in a housing 47 under the machine 1 as shown in Fig. 1, but this housing has been omitted in Fig. 2 because it is for the actual understanding of the invention is unnecessary. The location and assembly of the parts in the housing 47 has been made also not shown in Fig. 1, since these correspond to the usual. The electrical wiring continued from the photocell unit 50 in Fig. 2 for the sake of clear drawing reproduction as well omitted.

In the preferred arrangement, means for moving the pivot point of the control arm 17 are provided in addition to the automatic adjustment in order to achieve a manual adjustment of the strip feed. Such a hand control is extremely useful when the machine is started up. Instead of pivoting the arm 17 directly in the machine, the pivot point 18 can also be relocated to a plate 51 (FIG. Z) which can pivot about a point 52 in the machine. The plate 51 is provided with a handle 53 which extends outwardly from the machine. The plate 51 also carries a pointer 54 which moves over a scale 55 when the handle 53 is moved. The scale 55 can be engraved on a window 56 (FIG. 1) which is arranged in a housing 57 of the upper machine part. Their position in relation to the pointer 54 is also shown in FIG. The pivot pin 18 is in the form of a clamping screw.

In order to support the manual adjustment of the feeder, a measuring stick is provided, which is shown in FIG is shown. This measuring stick consists of a ruler 58 made of transparent material, one end with several cap size lines 59 and its other end with a scale 60 with numerical markings accordingly the markings on the scale 55 is provided. The distance between one of the lines 59 that is selected for the cap size used, and one of the scale markings 60 represents a measuring length accordingly a multiple, e.g. five times the ^ P diameter of that to be produced by the machine Caps. The use of a multiplied gauge length gives greater accuracy.

For using the scale to prevent any positional inaccuracy of the surface parts 3 a length of the printed film 2 is placed with the printed side up on a flat surface, urfd the scale 58 is placed on the foil with the line 59 that shows the selected cap size, against which one edge of one of the registration marks 4 of the film 2 is placed. Five gradations or registration marks 4, which represent a multiple measuring length, are then counted to the other end of the scale, and the Position of the fifth registration mark in relation to the three lines. 61st, 62nd and 63rd is observed. the long line 62 indicates the recommended length of the slide, while short linden trees 61 and 63 on each Side denote the maximum and minimum value of five times the cap diameter that the machine can still be successfully customized. When the fifth registration mark is on the foil the top and. lower limit line, namely the lines 61 and 62, the film is used to achieve suffice the agreement. If not, the film must be discarded as> unusable.

The scale 58 is then moved across the width of the film 2 so that the registration marks 4 under the opposite; Edge of the ruler, with the selected cap size line is still held by one edge of the registration mark. Five degrees of cap · or Diameters are then counted down the scale against scale 60, and the division under which the fifth registration mark falls is observed. The handle 53 is then turned back by the The clamping screw 18 is loosened and moved until the pointer 54 points to the similarly numbered division of the scale 55 is brought, whereupon the screw 18 is tightened.

In this way, the normal uncorrected length of the film, which is due for each type of cap the machine will always be exactly the same as required by the printing of the caps on the foil and any small discrepancies as a result of printing errors or stretching of the film during their processing is automatically corrected by the automatic registration control mechanism.

When using the ruler 58, it is essential to measure from the same side of the registration marks at each end of the rule, otherwise the width of the registration mark ζω leads to incorrect measurements

A visible display of the data is also provided. This consists of a pointer 64, which is rotatably mounted in a bearing 65 in the machine (Fig. 2) and at point 66 at a Control arm 17 attached lever arm 67 is articulated. At the free end of the pointer 64 is a runner 68 hinged so that the pointer tip moves on an arc during the movement of the control lever 17, while the runner moves up and down a scale 69 on a second window of the housing 57 is arranged. The special relationship of the runner 68 to the scale 69 is also shown in of Fig. 2 shown. The runner 68 and 'the scale 69 thus indicate the corrections that the feed automatically issued by the control mechanism. If the runner moves upwards, then: finds a small increase in the feed instead, and vice versa. If the runner 68 moves predominantly in one direction more than the other,

Claims (23)

then a small readjustment must be made by the handle 53 while the machine is running in order to achieve balanced operation; H. small improvements are possible in the direction of increasing or decreasing the feed. When the runner 68 z. B. moved predominantly upwards, the manually operated feed adjustment 53 is to be moved upwards by a small amount until the runner 68 moves in both directions, depending on the case. This final adjustment of the machine, although not essential, will certainly extend its life by reducing the work that the automatic correction mechanism has to perform. Since it can happen when the machine is initially operated with a new reel of film that the printed surface areas 3 are not in the specific position when the film is pulled through the machine, it is very easily possible or even likely that the imprint on the Cap is inaccurate. Although the machine will automatically correct this, a number of caps will become unusable before an exact match is made. This can be avoided by increasing the speed of the film feed. One possibility for such an increase in speed is shown schematically in FIG. A manual switch 71 is used to energize the supply increasing relay 30 independently of energization by the relay 44. The switch button is depressed until exactly matching caps are made. An automatic cut-off switch is preferably provided to ensure that the pulses from the photocell unit 50 will turn off the switch 71 when the caps are made in exact registration. Such a circuit breaker can be of conventional design and is therefore not shown here. While a particular embodiment has been described, it will be understood that various modifications are possible in accordance with the invention. For example, other means can be provided to establish a semi-permanent adjustment of the strip feed to compensate for a synchronization error. The determination of a Synchronisierfehkrs can z. B. be done in such a way that the pivot pin 18 is shifted somewhat in one direction or the other by a greatly reducing gear in order to cause a slight shift in the neutral position of the slide valve 9 with respect to the arm 10. The reduction gear can be driven by a screw spindle which raises or lowers the pin 18 a little. The spindle can be operated either with every synchronization error or after a certain number of errors in the same direction. This latter result can be achieved by driving the spindle through a backlash-free connection. In this way, repetitive errors in synchronization in the same direction will cause a semi-permanent compensation. Patent claims: 1. Device for the intermittent feeding of strip material, in particular of Strip material for manufacturing machines for bottle caps made of a metal that on areas of the caps to be produced from it with repeating at equal intervals Imprint patterns or the like is provided, characterized by each irregularity in the correspondence between the tool for forming the caps and the printed ones Cap areas on the film ascertaining device (50) which, when irregularities are detected, control members (24 to 42, 44, 45) for Controlling the strip feed actuates these irregularities by changing the stroke length to correct in the case of intermittent strip feed. 2. Apparatus mach claim 1, wherein the strip feed is driven by a vibratory or about a pin swinging lever arm which is at a point at a distance is connected by the pivot pin to a connecting rod, which is the drive means for the Strips actuated, characterized by the distance when irregularities are detected between the connection point of the connecting rod (8) on the swinging arm (10) and the Pivot pins (11) changing control members for controlling the strip feed. 3. Apparatus according to claim 2, characterized in that the connecting rod (8) with a slide (9) is connected, which can be pushed back and forth on the lever arm (10) to adjust the mentioned distance. 4. Apparatus according to claim 3, characterized in that the slide (9) of the connecting rod (8) to increase or decrease the length of the strip fed during a stroke depending on the response one or the determination device (50) on synchronous iermarkierungen, perforations or the like. can be moved on the strip as soon as the strip runs through the machine. 5. Device according to one of claims 1 to 4, characterized in that the determining device (50) consists of a photocell (48) which is placed on markings or perforations spaced along the length of the strip (4) responds, so that a signal pulse is generated during each feed stroke, whose Point in time with means, e.g. B. a switching device (35,36,37) is compared, which in depending on the time of the machine. 6. Device according to one of claims 3, 4 or 5, characterized in that the slide valve (9) is movable by a member (16) which at one end is connected to the slide valve (9) and is pivotably connected at its other end to a control arm (17), which is pivotably mounted in the machine or on a part connected to the machine. 7. Apparatus according to claim 6, characterized in that the control arm (17) for controlling the supply can be automatically raised and lowered by means of a double-armed cam (24), which rotates at half the speed of the feed drive and its arms with the ends of fingers (26,27) work together, which are pivotable to the Steueraran (17), which also has two Relay (30, 31) carries the armature (3-2, 33) after energizing the relay behind the outer ends of the ■ fingers (26, 27) grip to prevent their pivoting about their pins (28, 29) z-u, the Armature (32/33) release the ends of the fingers (26, 27) after switching off the Rekis, so that the arms the fingers (26,27) can move when the cam (24) rotates without actuating the control arm (17), while when a relay (30 or 31) is energized, its attracted armature (32 or 33) denotes associated finger blocked, so that the · cam arm, the control arm (17) depending on the energized relay raises or lowers as soon as the wing passes the associated finger. 8. Apparatus according to claim 7, characterized by a second of the machine drive (14,25) in rotation offset cam (34), which has a central contact (35) of a spring box Contact (36), against which it is normally located, lifts and against a second one the spring contact (37) arranged on the opposite side comes to rest, the spring contacts (36, 37) are connected to electronic control circuits that activate the relays (30,31) control on the control arm (17) and the central contact · (35) with the output electrode (43) of the Photocell (48) is connected, whereby when a synchronization signal from the photocell (48) in the occurs at the same moment in which the center contact (35) between the spring contacts (36,37) and not against any of these, none of the control circuits is energized, while if a. Signal pulse occurs before or after this point in time in the machine period, this occurs via one of the Spring contacts (36, 37) runs and energizes the corresponding electron control circuit. 9. Apparatus according to claim 8, characterized by the excited electron control circuits actuatable main relays (44, 45), which in turn control the relays (30, 31) on the control arm (17), 10. Apparatus according to claim 8 or 9, characterized in that the electron control circuits Thyratron tubes (40,41) contain, with their control electrodes (39, 40) the spring contacts (36, 37) are connected. 11. The device according to claim 10, characterized in that the main relay (44,45) in the Anode circle of the thyratrone (40, 41) lie. 12. Device according to claims 10 or 11, characterized by one of the second Cam (34) actuable during its rotation further contact switch (38), which the The anode circuit of the thyratrone (40,41) opens with each revolution, so that during each Period a previously ignited thyratron extinguishes during the same period, so that the control arm (17) is not operated during the next machine period, unless one or the other Thyratron is reignited. 13. Device according to one of claims 3 to 12, characterized by means for displacement the pivot point of the control arm in one direction or the other by a reducing Gear to effect a shift of the neutral position to the control arm, the reduction gear a spindle for raising or lowering the pivot point. 14. Apparatus according to claim 13, characterized in that the spindle is determined for each Synchronization error can be driven. 15. The device according to claim 14, characterized in that the spindle according to a predetermined one Number of errors can be actuated that occur in the same direction. 16. The apparatus of claim 14 or 15, characterized in that the spindle is through a playless connection is drivable. - 17. Device according to one of the preceding claims, characterized by hand'betätigte Means (51, 53) by which the strip feed is enabled independently of the automatic setting will. 18. The device according to claim 17, characterized in that the manual actuation means (51, 53) are provided with display and measuring means (54, 55) to allow a predetermined manual setting to enable. 19. Apparatus according to claim 17 or 18, characterized in that the pivot package (18) of the control arm (17) can be displaced by the manual actuation means (51, 53). 20. The device according to claim 19, characterized in that the control arm (17) with a Plate (51) can be moved, which in turn can be pivoted with respect to the machine frame and · carries a control handle (53) which extends outwardly from the machine and which when actuated causes a displacement of the pivot point (18) of the control arm (17). 21. The device according to claim 20, characterized in that the plate (51) with a pointer (54) is provided, which moves when the control handle (53) is moved over a scale (55). 22. Device according to claim 20 'or 21, characterized by display means for the working characteristics of the machine, which have a pointer (64) have, which is pivotably mounted in the machine and articulated to a member (67), which is attached to the control arm (17) so that the free end of the pointer moves of the control arm (17) moved on a curved line. 23. The device according to claim 22, characterized in that the free end of the pointer (64) is rotatably connected to a runner (68) which moves along when the pointer (64) is moved a scale (69) moves. 1 sheet of drawings 90S 508/256 4.59