3d printed articles for use in pulp molding die

Patent metadata

Field	Value
Publication number	US-2022018071-A1
Application number	US-202117372036-A
Country	US
Kind code	A1
Filing date	Jul 9, 2021
Priority date	Jul 14, 2020
Publication date	Jan 20, 2022
Grant date	—

Abstract

According to examples, a 3D printed article for use as a screen device or a mold of a pulp molding die may include a body having a set of holes and a set of protuberances formed on a surface of the body interposed between some of the holes, in which a plurality of respective channels may be formed between the protuberances.

First claim

What is claimed is:

1 . A 3D printed article for use as a screen device or a mold of a pulp molding die, the 3D printed article comprising:
a body having a set of holes; and a set of protuberances formed on a surface of the body interposed between some of the holes, wherein a plurality of respective channels are formed between the protuberances.

2 . The 3D printed article of claim 1 , wherein the protuberances are located at locations with respect to the set of holes and each other to result in a flow of fluid through the plurality of respective channels to have a predefined characteristic, wherein the predefined characteristic comprises a predefined level of support between the 3D printed article and another article and/or a predefined flow rate in certain flow directions through the plurality of respective channels.

3 . The 3D printed article of claim 1 , wherein a plurality of the holes are spaced apart from other holes at a certain distance and wherein a plurality of the protuberances have widths that are approximately equal to the certain distance.

4 . The 3D printed article of claim 1 , wherein a plurality of the holes have diameters that are approximately equal to widths of a plurality of the protuberances.

5 . The 3D printed article of claim 1 , wherein a plurality of the protuberances are located at a density on the body that is approximately equal to a density at which a plurality of the holes are located in the body.

6 . The 3D printed article of claim 1 , wherein the protuberances have frustoconical forms.

7 . The 3D printed article of claim , wherein the protuberances have heights and/or widths that are approximately equal to diameters of the holes.

8 . The 3D printed article of claim 1 , wherein the protuberances and the holes have widths that range between approximately 0.3 mm to approximately 0.8 mm.

9 . A 3D printed pulp molding die comprising:
a mold having:
a set of openings;
a screen device to be mounted on the mold, the screen device having:
a set of pores: and
a set of protuberances interposed between some of the pores; and
wherein the protuberances are to space the screen device from the mold when the screen device is mounted to the mold, and wherein a plurality of respective channels are to be formed between the protuberances.

10 . The 3D printed pulp molding die of claim 9 , wherein the openings in the mold are larger than the pores in the screen device.

11 . The 3D printed pulp molding die of claim 9 , wherein the protuberances have frustoconical forms.

12 . The 3D printed pulp molding die of claim 9 , wherein the protuberances have heights and/or widths that are approximately equal to diameters of the pores in the screen device.

13 . An apparatus comprising:
a processor; and a memory on which is stored instructions that when executed by the processor, cause the processor to:
obtain a digital model of an article to be fabricated by a 3D fabrication system, the digital model including digital holes;
determine locations at which digital protuberances are to be added to a surface of the digital model of the article, wherein the digital protuberances are to extend at a predefined height from the surface of the digital model; and
modify the digital model of the article to add the digital protuberances to the surface of the digital model of the article.

14 . The apparatus of claim 13 , wherein protuberances corresponding to the digital protuberances are to form a plurality of respective channels between the article and a second article when the article and the second article are mounted to each other and wherein the instructions cause the processor to:
determine the locations at which the digital protuberances are to be added to the surface of the digital model of the article to result in fluid flow through the plurality of respective channels to have a predefined characteristic, wherein the predefined characteristic comprises a predefined level of support between the article and the second article and/or a predefined flow rate in certain flow directions through the plurality of channels.

15 . The apparatus of claim 13 , wherein the instructions cause the processor to:
determine distances of spacings at which the digital holes are positioned with respect to each other; determine widths of the digital protuberances to be approximately equalo the determined distances of the digital hole spacings; and modify the digital model to add the digital protuberances having the determined widths.

Assignees

• Hewlett Packard Development Co

Inventors

• Briden John Joseph

Classifications

• D21J5/00 Primary

  Manufacture of hollow articles by transferring sheets, produced from fibres suspensions or papier-mâché by suction on wire-net moulds, to couch-moulds · CPC title

• D21F7/00

  Other details of machines for making continuous webs of paper · CPC title

• D21F3/00 Primary

  Press section of machines for making continuous webs of paper · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title

• B29C64/165

  using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber · CPC title