Method and device for conveying polymeric oblates to casting machines and application

Abstract

The invention includes a method and device for conveying pre-printed polymer oblates (IML), supplied in a roller, to a casting machine such as an injection press that molds items such as cups or lids, where the oblates must be integrated in items by the oblates being partially punched such that they remain fixed to the roller in points or bridges, after which the roller with the semi-punched oblates is placed on a device (1) from which the roller with oblates is rolled out in stages, such that the oblates pass through a tool (5) with holes (9) which are shaped to fit the circumference of the oblates, after which the oblates are removed with a device such as a robot with vacuum suction that tears over the river bridges that fix the oblate to the roller and transfers the oblates to the injection casting tool.

Claims

1. A method for conveying of at least one pre-printed polymer oblate (IML), produced in a flexo printing machine and supplied in a roller, to a casting machine configured to molds items, wherein the at least one oblate will be integrated into the items, comprising: semi-punching the at least one oblate such that the at least one oblate remains attached to the roller by connection points or bridges, attaching the roller with the at least one semi-punched oblate to a device from which the roller with the at least one semi-punched oblate is rolled out in stages, such that the at least one semi-punched oblate passes through a tool with holes shaped to comply to the oblate form, and removing at least one of the semi-punched oblates with a robot that is configured to tear the connection points or bridges that hold the semi-punched oblates onto the roller and transfer the at least one oblate to the casting machine.

2. A device that is suitable for conveying rolled-up, pre-printed polymer oblates, which are partially punched, comprising: an unwinder for attaching a roller of oblates from which the rolled-up oblates are fed through a tool that contains holes which are shaped to fit the circumference of the oblates; a splice-table positioned between the unwinder and the tool, wherein the rolled-up oblates pass the splice-table after the unwinder; a web guide that the rolled-up oblates are conveyed past; and a delivery board configured to feed the rolled-up oblates for positioning through the tool.

3. The device according to claim 2, further comprising a feeder which can pull rolled oblates forward through the device, and wherein the feeder is placed after the tool.

4. The device according to claim 2, further comprising a buffer system that contains a number of rollers for equalization of traction in rolled-up oblates.

5. The device according to claim 2, further comprising a winder for rolling-up roller residue after removal of oblates.

6. The device according to claim 2, wherein the device is configured to convey pre-printed, semi-punched polymer oblates from the roller to a robot that tears off the individual oblates from the roller and transfers them to an injection moulding tool that moulds items onto which the oblates are integrated in the injection press.

7. The method according to claim 1, wherein the casting machine is an injection press that molds items.

8. The method according to claim 1, wherein the robot uses vacuum suction to tear over the connection points or bridges.

9. The device according to claim 6, wherein items molded by the injection moulding tool are cups or lids.

10. The method according to claim 7, wherein items molded by the injection press are cups or lids.

11. A device that is suitable for conveying rolled-up, pre-printed polymer oblates, which are partially punched, comprising: an unwinder for attaching a roller of oblates from which the rolled-up oblates are fed through a tool that contains holes which are shaped to fit the circumference of the oblates; and a buffer system that contains a number of rollers for equalization of traction in rolled-up oblates.

12. The device according to claim 11, further comprising a feeder which can pull rolled oblates forward through the device, and wherein the feeder is placed after the tool.

13. The device according to claim 11, further comprising a winder for rolling-up roller residue after removal of oblates.

14. The device according to claim 11, wherein the device is configured to convey pre-printed, semi-punched polymer oblates from the roller to a robot that tears off the individual oblates from the roller and transfers them to an injection moulding tool that moulds items onto which the oblates are integrated in the injection press.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention will now be explained more further with reference to the drawings, in which:

(2) FIG. 1 shows a perspective view of an apparatus which is suitable for conveying rolled-up, pre-printed polymer oblates (IML); and

(3) FIG. 2 shows, just as FIG. 1, the same apparatus which is suitable for conveying rolled-up, pre-printed polymer oblates (IML), but from a different angle.

DETAILED DESCRIPTION OF THE INVENTION

(4) FIG. 1 denotes, as 1 shows, an apparatus which is suitable for conveying rolled-up, pre-printed polymer oblates (IML), which are partially punched, as indicated, by a process which includes that the oblates are semi-punched so that they remain attached to the roller in the bridges, according to which the roller with the semi-punched oblates are placed in an apparatus 1 from which the roller with the oblates is rolled out in stages, feeding the oblates through a tool 5, which consists of an upper and lower part with holes 9 which are shaped to fit the circumference of the oblates, after which an oblate is removed with a unit such as a robot with vacuum suction that tears over the bridges that fix the oblates to the roller and transfers the oblates to the injection press.

(5) In a preferred processing method, the tool 5 is prepared so that the upper part and the lower part with holes 9 are clamped around the film web with oblates for the fixation of the film before the tearing off of an oblate.

(6) The apparatus 1 comprises an unwinder 10 for attaching a roller of oblates from which the rolled-up oblates are conveyed through a tool 5 that is formed with holes 9 which are shaped to fit the circumference of the oblates.

(7) In a preferred processing method as shown in FIG. 1 and FIG. 2, the apparatus is further characterized in a splice table 2 being positioned between the unwinder 10 and the tool 5, which the rolled-up oblates pass after the unwinder 10 from which the rolled-up oblates are conveyed past a so-called web guide 3, and then past a delivery board 4 that guides the rolled-up oblates for positioning through the tool 5.

(8) As shown in FIG. 1 and FIG. 2, the apparatus 1 is also fitted with a feeder 6, which can advance the rolled-up oblates through the apparatus 1, where the feeder 6 is positioned after the tool 5.

(9) The apparatus 1 also contains a buffer system 8 which comprises a plurality of spring-loaded rollers to compensate for pulling the rolled-up oblates.

(10) The buffer system reduces the instantaneous characteristics of the rolled-up oblates when they are advanced by the feeder 6.

(11) FIGS. 1 and 2 show that the apparatus 1 also comprises a winder 7 for rolling up roller residue after removal of oblates.

(12) As stated, the invention comprises the use of said apparatus 1 for conveying pre-printed, semi-punched polymer oblates from a roller to a robot that tears off the individual oblates from the roller and transfers them to an injection press that moulds items such as cups or lids where the oblates are integrated into the injection press.