# US 2019/0376238 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 > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0376238 A1 - Document ID: US20190376238A1 - Status: Published application - Kind: A1 - Application number: 16/548,304 - 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/US20190376238A1 ## 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 producing a porous mold, the method comprising: providing a porous mold comprising a tool wall portion having pores provided by a plurality of channels extending through the tool wall portion, from a product face, for contacting the product, to a back face on the other side of the wall relative to the product face, wherein the channels are straight or curved with no more than one point of inflection; and forming the channels by use of an additive manufacturing process. ### Claim 35 (depends on 34) The method as claimed in claim 34, wherein the additive manufacturing process is a 3D printing process. ### Claim 36 (depends on 34, 35) The method as claimed in claim 34 or 35, wherein the porous mold is made from a powdery material having particles of an average size of 1-50 microns. ### Claim 37 (depends on 34, 35) The method as claimed in claim 34 or 35, wherein the porous mold is made from a powdery material having particles of an average size of 5-30 microns. ### Claim 38 (depends on 34) The method as claimed in claim 34, wherein the porous mold is made from a material being a metal or a metal alloy. ### Claim 39 (depends on 34) The method as claim in claim 34, wherein the porous mold is made from a material being titanium or a titanium alloy, aluminum or an aluminum alloy, copper or a copper alloy, a bronze, brass, cobalt or chrome alloy or stainless steel. ### Claim 40 (depends on 34) The method as claimed in claim 34, wherein the porous mold is made from a material being a polymeric material, such as a plastic material. ### Claim 41 (depends on 36) The method as claimed in claim 36, wherein the material between the channels is homogenous and at least 95% free from voids. ### Claim 42 (depends on 36) The method as claimed in claim 36, wherein the material between the channels is homogenous and at least 99% or 99.9% free from voids. ### Claim 43 A method of producing a porous tool or tool part for molding a product from a pulp slurry, the method comprising: providing particles of a material from which the tool or tool part is to be formed, successively dispensing a plurality of layers of said particles at a target surface, and directing an energy source at locations of each dispensed layer of particles at the target surface corresponding to cross-sections of the tool or tool part to be produced therein, such that the powder particles are fused together. ### Claim 44 (depends on 43) The method as claimed in claim 43, further comprising forming a tool wall portion having pores provided by a plurality of channels extending through the tool wall portion, from a product face to a back face, wherein the channels are straight or curved with no more than one point of inflection. ### Claim 45 (depends on 44) The method as claimed in claim 44, wherein the material between the channels is homogenous and at least 95% free from voids. ### Claim 46 (depends on 44) The method as claimed in claim 44, wherein the material between the channels is homogenous and at least 99% or 99.9% free from voids. ### Claim 47 (depends on 43, 44, 45) The method as claimed in any one of claims 43-45, wherein the particles have an average size of 1-50 microns. ### Claim 48 (depends on 43, 44, 45) The method as claim in any one of claims 43-45, wherein the particles have an average size of 5-30 microns. ### Claim 49 (depends on 43) The method as claimed in claim 43, wherein the step of directing an energy source at locations of each dispensed layer of particles at the target surface corresponding to cross-sections of the tool or tool part to be produced therein, comprises completely melting the powdery material by adding energy by use of a laser beam or an electron beam. ### Claim 50 (depends on 43) The method as claimed in claim 43, wherein the material is a metal or a metal alloy. ### Claim 51 (depends on 43) The method as claimed in claim 43, wherein the material includes a titanium or titanium alloy, an aluminum or aluminum alloys, a copper or copper alloy, a bronze, brass, cobalt or chrome alloys or stainless steel. ### Claim 52 (depends on 43) The method as claimed in claim 43, wherein the material is one of a polymeric material and a plastic material.