# US 10,309,062 B2 · Method and device for manufacturing a fibre moulding and a fibre moulding manufactured using these

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- Number: US 10,309,062 B2
- Document ID: US10309062B2
- Status: Granted
- Kind: B2
- Application number: 15/515,400
- Filed: 2015-09-29
- Published: 2017-08-10
- Granted: 2019-06-04
- Earliest claimed: 2014-09-30
- Assignees: SIG Technology AG
- Applicants: SIG Technology AG
- Inventors: Christer Halvardsson; David Kjellin
- Web page: https://patentgrep.com/patent/US10309062B2

## CPC

- 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
- D21J 7/00: Manufacture of hollow articles from fibre suspensions or papier-mâché by deposition of fibres in or on a wire-net mould
- D21J: FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE (manufacture of articles by dry processes B27N)

## Abstract

A method and a device for manufacturing a fiber molding 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 fiber 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 fiber molding. A device for manufacturing of a fiber molding is also provided.

## Claims

### Claim 1

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.

### Claim 2 (depends on 1)

The method according to claim 1, wherein an upper edge of the fibre moulding is sprayed with water before it is removed from the moulding screen.

### Claim 3 (depends on 1)

The method according to claim 1, 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.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the fibre moulding is dried after removal.

### Claim 5 (depends on 4)

The method according to claim 4, wherein the drying takes place using compressed air.

### Claim 6 (depends on 4)

The method according to claim 4, wherein the drying takes place using thermal energy supplied.

### Claim 7 (depends on 1)

The method according to claim 1, wherein an inner and an outer surface of the fibre moulding are coated so as to be gas-tight and/or liquid-tight.

### Claim 8 (depends on 1)

The method according to claim 1, wherein an edge all the way around the fibre moulding is cut to length and an opening located in the fibre moulding is introduced.

### Claim 9 (depends on 8)

The method according to claim 8, wherein the cutting to length of the edge or introduction of the opening take place by die-cutting or by laser cutting.

### Claim 10 (depends on 1)

The method according to claim 1, wherein the toolholder with the moulding screen and the sleeve is cleaned by being sprayed with water.