Hot-stamping machine

Patent metadata

Field	Value
Publication number	US-9889641-B2
Application number	US-201314435890-A
Country	US
Kind code	B2
Filing date	Oct 24, 2013
Priority date	Oct 25, 2012
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

A hot-stamping device ( 1 ) is described, having a stamping device ( 2 ) for transferring a transfer layer ( 15 u ) disposed on a carrier layer ( 15 t ) of a hot-stamping foil ( 15 ) onto a substrate ( 14 ). The hot-stamping device comprises a heatable stamping roller ( 11 ) and a counter-pressure roller ( 12 ), between which a stamping gap ( 16 ) is realized, in which a stamped substrate ( 17 ) is realized, and comprising a separating device ( 3 ), disposed downstream, for separating the carrier layer ( 15 t ) from the stamped substrate ( 17 ). The separating device ( 3 ) has a separating element ( 20 ), which is realized as a bar-shaped hollow body, disposed on which there is a supply for a compressed gas ( 21 ). At least one longitudinal edge of the separating element ( 20 ) is realized as a perforated separating edge ( 20 k ) having outflow openings ( 20 a ) for the compressed gas ( 22 ), for the purpose of realizing a gas cushion between the carrier layer ( 15 t ) and the separating element ( 20 ). The separating edge ( 20 k ) is disposed transversely in relation to the running direction and parallelwise in relation to the top side of the coated substrate ( 17 ).

First claim

The invention claimed is:

1. A hot-stamping device having a stamping device for transferring a transfer layer disposed on a carrier layer of a hot-stamping foil onto a substrate, comprising a heatable stamping roller and a counter-pressure roller, between which a stamping gap is realized, in which a stamped substrate is realized, and comprising a separating device, disposed downstream, for separating the carrier layer from the stamped substrate,
wherein the separating device has a separating element comprising, a bar-shaped hollow body having a first and second substantially planar surface meeting at a longitudinal separating edge, the separating element being connected to a supply for a compressed gas, and
wherein the separating element is perforated such that outflow openings for the compressed gas are formed in the first and second surfaces adjacent to and on opposite sides of the longitudinal separating edge, for the purpose of realizing a gas cushion between the carrier layer and the separating edge,
wherein the carrier layer is separated from the substrate in the separating device.

2. A hot-stamping device according to claim 1 , wherein the separating edge is disposed transversely in relation to the running direction and parallelwise in relation to the top side of the coated substrate.

3. A hot-stamping device according to claim 1 , wherein the separating element has a polygonal cross-section.

4. A hot-stamping device according to claim 3 , wherein the separating element has a rectangular cross-section.

5. A hot-stamping device according to claim 1 , wherein the separating edge has through-holes that open into the outlet openings.

6. A hot-stamping device according to claim 1 , wherein the separating edge is realized as a rounded edge having an edge radius.

7. A hot-stamping device according to claim 5 , wherein the through-holes are realized as drilled holes having a drilled-hole radius that is smaller than the edge radius of the separating edge.

8. A hot-stamping device according to claim 7 , wherein the drilled-hole radius is 20% smaller than the edge radius of the separating edge.

9. A hot-stamping device according to claim 5 , wherein the through-holes are realized as slots having a slot width that is smaller than the edge radius of the separating edge.

10. A hot-stamping device according to claim 9 , wherein the slot width is 20% smaller than the edge radius of the separating edge.

11. A hot-stamping device according to claim 5 , wherein the separating element is made of a sintered material having open pores, wherein the open pores constitute the through-holes and wherein the open pores are sealed with a lacquer coating in the regions outside of the separating edge.

12. A hot-stamping device according to claim 5 , wherein the through-holes are uniformly distributed over the surface area of the separating edge.

13. A hot-stamping device according to claim 1 , wherein the area ratio of the total area of the outflow openings to the closed remaining area is 50:50%.

14. A hot-stamping device according to claim 1 , wherein the pressure of the compressed gas is in the range of from 1 bar to 6 bar.

15. A hot-stamping device according to claim 14 , wherein the pressure of the compressed gas is selected such that a gas cushion, having a thickness in the range of from 1 μm to 100 μm, is realized between the surface of the separating edge and the surface of the carrier layer that faces towards the separating edge.

16. A hot-stamping device according to claim 1 , wherein the separating edge is disposed downstream from the center of the stamping roller, at a horizontal axial distance of from 200 mm to 300 mm.

17. A hot-stamping device according to claim 1 , wherein the vertical distance in relation to the underside of the stamped substrate and/or the angle of inclination of the separating element can be set.

18. A hot-stamping device according to claim 17 , wherein the vertical distance is in the range of from 0.2 mm to 5 mm.

19. A hot-stamping device according to claim 17 , wherein the separating element is realized so as to be pivotable by ±15° about a rotation axis, parallelwise in relation to the longitudinal axis of the separating element.

20. A hot-stamping device according to claim 1 , wherein the perforated separating edge is disposed at a point of separation of the carrier layer and the stamped substrate.

21. A hot-stamping device having a stamping device for transferring a transfer layer disposed on a carrier layer of a hot-stamping foil onto a substrate and a separating device disposed downstream from the stamping device for separating the carrier layer from the stamped substrate, the stamping device comprising a heatable stamping roller and a counter-pressure roller, between which a stamping gap is realized, in which a stamped substrate is realized, and the separating device comprising:
a separating element comprising a bar-shaped hollow body, the hollow body including a perforated separating edge having outflow openings for providing a cushion of compressed gas between the carrier layer and the separating edge;
a connecting piece connected to the separating element for supplying a compressed gas to the outflow openings of the separating edge; and
a pivot bearing defining an axis of rotation of the separating element whereby an angle of inclination of the separating element can be set.

22. A hot-stamping device according to claim 21 , wherein the bar-shaped hollow body comprises a first and second planar surface meeting at the separating edge, the outflow openings for the compressed gas being formed in the first and second surfaces immediately adjacent to and on opposite sides of the separating edge.

Assignees

• Leonhard Kurz Stiftung & Co Kg

Inventors

• Bieber Reinhard

Classifications

• B29C65/78

  Means for handling the parts to be joined, e.g. for making containers or hollow articles {, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus} · CPC title

• B21D37/16

  Heating or cooling · CPC title

• B41F16/002 Primary

  Presses of the rotary type · CPC title

• B65H41/00

  Machines for separating superposed webs · CPC title

• B41F19/062

  Presses of the rotary type · CPC title