Method for the production of three-dimensional molded parts from a fiber-containing material and fiber processing device

Patent metadata

Field	Value
Publication number	US-2024116213-A1
Application number	US-202318481391-A
Country	US
Kind code	A1
Filing date	Oct 5, 2023
Priority date	Oct 7, 2022
Publication date	Apr 11, 2024
Grant date	—

Abstract

A method for producing three-dimensional molded parts from a fiber-containing material and a fiber processing device are described. In this case, a provision of separated fibers, an arrangement of the separated fibers to form at least one preform, wherein the at least one preform substantially corresponds to the shape of a molded part to be produced, and a pressing of the at least one preform to form a three-dimensional molded part take place. The fiber processing device at least has a feeding device for providing separated fibers; a premolding device, which has at least one premold for forming preforms from fibers fed separately, which corresponds to the final form of the molded part to be produced; a transfer device for transferring preforms provided via the at least one premold and made of fiber-containing material; and a molding device for pressing preformed preforms to form finished three-dimensional molded parts.

First claim

1 . A method for production of three-dimensional molded parts from a fiber-containing material, at least having the following steps:
providing separated fibers, arranging the separated fibers to form at least one preform, wherein the at least one preform substantially corresponds to a shape of a molded part to be produced, and pressing the at least one preform to form a three-dimensional molded part.

2 . The method according to claim 1 , wherein pre-pressing the at least one preform takes place after arranging the separated fibers to form at least one preform.

3 . The method according to claim 1 , wherein the arrangement of the separated fibers and the pressing of the at least one preform take place continuously and coordinately or discontinuously.

4 . The method according to claim 1 , wherein fibers made of a fiber-containing material are separated for a provision in an upstream step.

5 . The method according to claim 1 , wherein the pressing of the at least one preform to form the three-dimensional molded part takes place under an action of heat.

6 . The method according to claim 1 , wherein the separated fibers of at least one premold are fed to a premolding device, wherein the separated fibers are uniformly distributed on a surface of the premold and the premold substantially corresponds to the shape of the molded part to be produced, whereby the at least one preform is formed.

7 . The method according to claim 6 , wherein, after the premolding, the at least one preform is transferred to a molding device and the at least one preform is pressed in the molding device to form the three-dimensional molded part.

8 . The method according to claim 6 , wherein the separated fibers are blown into or onto the surface of the premold and/or are sucked via the surface of the premold.

9 . A fiber processing device for producing three-dimensional molded parts from a fiber-containing material, at least having a feeding device for providing separated fibers; a premolding device, which has at least one premold for forming preforms from fibers fed separately, which corresponds to a final form of the molded part to be produced; a transfer device for transferring the preforms provided via the at least one premold and made of fiber-containing material; and a molding device for pressing the preforms to form finished three-dimensional molded parts.

10 . The fiber processing device according to claim 9 , wherein the at least one premold has a surface having openings at least partially.

11 . The fiber processing device according to claim 10 , wherein a size of the openings is different.

12 . The fiber processing device according to claim 10 , wherein the surface has a mesh-like or screen-like structure.

13 . The fiber processing device according to claim 10 , wherein, via the openings in the surface of the at least one premold, the separated fibers being configured to be sucked via a suction device.

14 . The fiber processing device according to claim 9 , wherein the feeding device has a fan, via which the separated fibers are configured to be introduced into the at least one premold.

15 . The fiber processing device according to claim 9 , wherein the feeding device has at least one feed duct, which opens into the at least one premold.

16 . The fiber processing device according to claim 15 , wherein the feed duct terminates flush with a surface of the at least one premold.

17 . The fiber processing device according to claim 9 , further having a mill for providing the separated fibers from a starting material.

Assignees

• Kiefel Gmbh

Inventors

• Hausmann Matthias

Classifications

• B27N5/02 Primary

  Hollow articles · CPC title

• B27N1/00 Primary

  Pretreatment of moulding material · CPC title

• B27N3/04

  from fibres · CPC title

• B27N3/12

  from fibres · CPC title

• B27N3/16

  Transporting the material from mat moulding stations to presses (B27N3/22 takes precedence); Apparatus specially adapted for transporting the material or component parts therefor, e.g. cauls (transport devices in general B65G) · CPC title