Method and Device for Manufacturing a Fibre Moulding and a Fibre Moulding Manufactured Using These

• US 20170226699A1
• Filed: 09/29/2015
• Published: 08/10/2017
• Est. Priority Date: 09/30/2014
• Status: Active Grant

• Current Assignee: SIG Technology AG (SIG Group AG)
• Original Assignee: SIG Technology AG (SIG Group AG)
• Inventors: Halvardsson, Christer, Kjellin, David
• Granted Patent: US 10,309,062 B2
• Time in Patent Office: Days
• CPC Class Codes: D21J 5/00 Manufacture of hollow articles by transferring sheets, produced from fibres suspensions or papier-mâché by suction on wire-net moulds, to couch-moulds
• CPC Class Codes: D21J 7/00 Manufacture of hollow articles from fibre suspensions or papier-mâché by deposition of fibres in or on a wire-net mould

Abstract

A method and a device for manufacturing a fibre moulding for drinks packaging containers having an improved structure and surface quality. The method includes the following steps: dipping of a forming wire arranged on a toolholder into a pulp slurry, lifting of the toolholder in order to move the covered forming wire completely out of the pulp slurry, compressing of the fibre material in an area of the circumferential edge of the forming wire through inflating of a circumferential collar, relaxing of the pressure in the collar, and removing of the fibre moulding. A device for manufacturing of a fibre moulding is also provided.

Claims

1-21. -21. (canceled)

22. A method for manufacturing a head or base element for drinks packaging containers formed from a fibre moulding, the method comprising the following steps:

dipping of a moulding screen arranged on a toolholder, said moulding screen extending along an outer contour of a moulding tool, into a fibre-containing pulp slurry in order to cover the moulding screen with fibre material,

lifting of the toolholder in order to move the moulding screen covered with fibre material completely out of the pulp slurry,

compressing the fibre material in an area of a peripheral edge of the moulding screen through expansion of a sleeve arranged around the moulding tool and going all the way around the moulding screen,

relaxing pressure in the sleeve,

removing fibre moulding from the moulding screen,

transferring the fibre moulding onto a press tool, and

mechanically compacting the fibre moulding on the press tool with a geometry corresponding to the fibre moulding.

23. The method according to claim 22, wherein an upper edge of the fibre moulding is sprayed with water before it is removed from the moulding screen.

24. The method according to claim 22, wherein the moulding screen is adapted to have air applied to it from an inside in such a way that both an underpressure, for precipitation of the fibre material, and an overpressure for releasing and removing the fibre moulding can be applied.

25. The method according to claim 22, wherein the fibre moulding is dried after removal.

26. The method according to claim 25, wherein the drying takes place using compressed air.

27. The method according to claim 25, wherein the drying takes place using thermal energy supplied.

28. The method according to claim 22, wherein an inner and an outer surface of the fibre moulding are coated so as to be gas-tight and/or liquid-tight.

29. The method according to claim 22, wherein an edge all the way around the fibre moulding and an opening located in the fibre moulding are cut to length and/or introduced respectively.

30. The method according to claim 29, wherein the cutting to length of the edge or introduction of the opening take place by cutting, die-cutting, or by a laser.

31. The method according to claim 22, wherein the toolholder with the moulding screen and the sleeve is cleaned by being sprayed with water.

40. A fibre moulding, for a head or base element for drinks packaging containers, wherein a peripheral area of the head or base element is sealable with a tube-shaped drinks container sleeve when coated, and is manufactured using the method according to claim 22, with a connector and a peripheral area on a terminal edge of the fibre moulding equipped with a compact and stable fibre layer, wherein the fibre layer in the peripheral area is manufactured through expansion of the sleeve going around the moulding tool.

32. A device for manufacturing a head or base element for drinks packaging containers formed from a fibre moulding, with a toolholder and a moulding screen arranged thereon, said moulding screen extending along an outer contour of a moulding tool,

wherein a sleeve going all the way around the moulding screen is provided which runs beneath an edge of the moulding screen and is expandable from a basic position into a working position, and wherein the sleeve is arranged on the toolholder.

33. The device according to claim 32, wherein the moulding tool arranged in an interior of the moulding screen, corresponds to a shape of the fibre moulding and has a plurality of air channels.

34. The device according to claim 33, wherein the air channels run from at least one central supply line to different points on an outer surface of the moulding tool.

35. The device according to claim 32, wherein the sleeve is clamped in an inward direction by the moulding screen or the moulding tool and clamped in an outward direction by a retaining plate pressed tightly on the toolholder.

36. The device according to claim 32, wherein beneath the sleeve an air channel bound around the moulding screen is provided which has at least one compressed air connection for the supply and/or removal of compressed air.

37. The device according to claim 32, wherein the moulding screen is designed as a positive mould and the sleeve is positioned on a lower edge of the moulding screen.

38. The device according to claim 32, wherein the moulding screen is designed as a negative mould and the sleeve is positioned on an upper edge of the moulding screen.

39. The device according to claim 32, wherein the sleeve comprises fluorelastomer.