# US 2019/0376239 A1 · Tool or tool part, system including such a tool or tool part, method of producing such a tool or tool part and method of molding a product from a pulp slurry

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- Number: US 2019/0376239 A1
- Document ID: US20190376239A1
- Status: Published application
- Kind: A1
- Application number: 16/548,421
- Filed: 2019-08-22
- Published: 2019-12-12
- Earliest claimed: 2017-06-19
- Assignees: Celwise AB
- Applicants: Celwise AB
- Inventors: John Andersson; Udo Vogt; David A. Pierce
- Web page: https://patentgrep.com/patent/US20190376239A1

## CPC

- D21J 7/00: Manufacture of hollow articles from fibre suspensions or papier-mâché by deposition of fibres in or on a wire-net mould
- B22F 3/1109: {Inhomogenous pore distribution (composite layers of porous nature B22F7/002)}
- B22F 5/007: {of moulds}
- D21J 3/00: Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds
- 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
- B22F 7/064: {using an intermediate powder layer}
- B29C 33/3814: {Porous moulds (adapted for vacuum forming B29C51/365)}
- B29C 45/2738: {specially adapted for manifolds}
- B33Y 10/00: Processes of additive manufacturing
- Y02P 10/25: Process efficiency
- D21J: FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE (manufacture of articles by dry processes B27N)
- B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The present document discloses a tool or tool part for use in a process of molding a product from a pulp slurry. The tool or tool part comprises a self-supporting tool wall portion having a product face, for contacting the product, and a back face on the other side of the wall relative to the product face. The tool wall portion presenting pores, which are provided by a plurality of channels extending through the tool wall portion, from the product face to the back face. The channels are straight or curved with no more than one point of inflection.

## Claims

### Claim at position 1

1-33. (canceled)

### Claim 34

A method of molding a product from a pulp slurry, the method comprising:
in a first step, providing a pickup tool, for picking up pulp from a pulp slurry, the pickup tool comprising a self-supporting pickup tool wall portion having a product face, for contacting the product, and a back face on the other side of the wall relative to the product face, the pickup tool wall portion presenting pores, which are provided by a plurality of channels extending through the pickup tool wall portion, from the product face to the back face;
applying a vacuum to the back face of the pickup tool, and
applying pulp slurry to the product face of the pickup tool;
in a second step, providing a transfer tool for receiving an amount of pulp from another tool, the transfer tool comprising a self-supporting transfer tool wall portion having a product face, for contacting the product, and a back face on the other side of the wall relative to the product face, the transfer tool wall portion presenting pores, which are provided by a plurality of channels extending through the tool wall portion, from the product face to the back face;
applying a vacuum to the back face of the transfer tool, and
applying the pulp slurry to the product face of the transfer tool; and
in a third step, providing a pressing tool for pressing an amount of pulp to form a molded product, the pressing tool comprising a self-supporting pressing tool wall portion having a product face, for contacting the product, and a back face on the other side of the wall relative to the product face, the pressing tool wall portion presenting pores, which are provided by a plurality of channels extending through the tool wall portion, from the product face to the back face, the pressing tool forming part of a pressing arrangement comprising a male pressing tool and a female pressing tool;
applying a vacuum to the back face of at least one of the male or female pressing tool,
applying the pulp slurry to the product face of the male pressing tool or of the female pressing tool,
heating at least one of the male or female pressing tool, and
forcing the male pressing tool and the female pressing tools towards each other, such that the pulp slurry is pressed between product faces of the respective tool.

### Claim 35 (depends on 34)

The method as claimed in claim 34, wherein the channels of the pickup tool are straight or curved with no more than one point of inflection.

### Claim 36 (depends on 34, 35)

The method as claimed in claim 34 or 35, wherein the channels of the transfer tool are straight or curved with no more than one point of inflection.

### Claim 37 (depends on 34)

The method as claimed in claim 34, wherein the channels of the pressing tool are straight or curved with no more than one point of inflection.

### Claim 38 (depends on 34)

The method as claimed in claim 34, further comprising repeating the second and third steps.