Powder for layerwise manufacturing of objects

Patent metadata

Field	Value
Publication number	US-9833788-B2
Application number	US-201414189047-A
Country	US
Kind code	B2
Filing date	Feb 25, 2014
Priority date	Mar 21, 2004
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

The invention describes powders for use in the production of spatial structures, i.e. molded bodies, using layer build-up methods, as well as methods for their efficient production. The powders have the special feature that they have good flow behavior, for one thing, and at the same time, have such a composition that the molded body that can be produced with the powder, using rapid prototyping, has significantly improved mechanical and/or thermal properties. According to a particularly advantageous embodiment, the powder has a first component that is present in the form of essentially spherical powder particles, which is formed by a matrix material, and at least one further component in the form of stiffening and/or reinforcing fibers, which are preferably embedded in the matrix material.

First claim

The invention claimed is:

1. A method for the production of a powder comprising essentially spherical particles of an aromatic polyether ketone plastic, comprising:
cooling a coarse granulate comprising a plastic matrix material to form brittle, coarse granulates;
grinding the brittle, coarse granulates; and
separating the ground granulate into a fraction spectrum,
wherein the grinding is carried out with a pinned disk mill.

2. A method for the production of a powder comprising essentially spherical particles of an aromatic polyether ketone plastic, comprising:
cooling a coarse granulate comprising a plastic matrix material to form brittle, coarse granulates;
grinding the brittle, coarse granulates;
separating the ground granulate into a fraction spectrum; and
smoothing the ground granulate,
wherein the smoothing is carried out by embedding or accumulating at least one of microparticles or nanoparticles.

3. A method for producing a powder comprising a first component in the form of essentially spherical powder particles and at least one of a stiffening fiber or a reinforcing fiber, wherein the first component comprises a matrix material, comprising:
cooling a coarse granulate plastic comprising the matrix material to form brittle, coarse granulates;
grinding the brittle, coarse granulates; and
separating the ground granulate into a fraction spectrum.

4. The method according to claim 3 , wherein the coarse granulate is a fiber-reinforced plastic matrix material.

5. The method according to claim 3 , wherein the grinding is carried out with a pinned disk mill.

6. The method according to claim 3 , wherein the grinding is carried out with cooling.

7. The method according to claim 3 , wherein the separating is carried out with an air separator.

8. The method according to claim 3 , further comprising:
smoothing the ground granulate.

9. The method according to claim 8 , wherein the smoothing is carried out by embedding or accumulating at least one of microparticles or nanoparticles.

Assignees

• Hesse Peter
• Paul Tillmann
• Weiss Richard
• Eos Gmbh Electro Optical Systems

Inventors

• Hesse Peter
• Paul Tillmann
• Weiss Richard

Classifications

• C08J3/122

  Pulverisation by spraying · CPC title

• C08L71/00 Primary

  Compositions of polyethers obtained by reactions forming an ether link in the main chain (of polyacetals C08L59/00; of epoxy resins C08L63/00; of polythioether-ethers C08L81/02; of polyether-sulfones C08L81/06); Compositions of derivatives of such polymers · CPC title

• C08G65/46

  Post-polymerisation treatment, e.g. recovery, purification, drying · CPC title

• C08G2650/40

  containing ketone groups, e.g. polyarylethylketones, PEEK or PEK · CPC title

• C08J2371/00

  Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers · CPC title