Plastic component and method for generating a surface structure on a plastic component

Patent metadata

Field	Value
Publication number	US-10668568-B2
Application number	US-201715786895-A
Country	US
Kind code	B2
Filing date	Oct 18, 2017
Priority date	Oct 18, 2016
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

Abstract

A plastic component is provided that leads to an initial friction reduction with a friction partner. At least part of the surface of the plastic component, which interacts with a surface of a friction partner, is provided with a plurality of structures. The structures are composed of at least one structure type. Between two adjacent structure types, a distance is formed in the range of 10 microns to 1 mm. A width of the structure types is in the range of 10 microns to 100 microns. A height or depth of the structure types is in the range from 1 micron to 100 microns.

First claim

What is claimed is:

1. A method for producing a surface structure in at least a portion of a surface of a thermoplastic plastic component in an injection molding process, the method comprising:
forming, with a pulsed laser, a negative surface structure of a surface structure to be formed on the plastic component in a surface of an insert for a tool for manufacturing the plastic component in an injection molding process, and
molding the plastic component with the insert thereby forming the surface structure on the surface of the plastic component, the surface structure including several structure types each arranged in a straight line such that the structure types are abraded during use of the plastic component to form a lubricating film on the surface of the plastic component,
wherein a distance between two adjacent straight lines of the structure types in at least a part of the surface of the injection molded plastic component is in a range of 10 microns to 1 mm,
wherein a width of the structure types arranged in the straight line in at least a portion of the surface of the injection molded plastic component is in the range from 10 microns to 1 mm, and
wherein a height or depth of the structure types arranged in the straight line in at least a part of the surface of the injection molded plastic component is in the range from 1 micron to 100 microns.

2. The method according to claim 1 , wherein, when forming the negative surface structure in the tool for producing the plastic component in the injection molding process in at least a part of the surface of the plastic component, the pulsed laser is controlled such that the distance, the width or the height of the structure types arranged in the straight line or the distance, the width or the depth of the structure types arranged in the straight line vary or are constant at the surface of the plastic component.

3. The method according to claim 1 , wherein the structure types arranged in the straight line have an orientation which is aligned in a flow direction of the thermoplastic plastic in the injection molding process.

4. The method according to claim 1 , wherein the pulsed laser is controlled such when forming the negative surface structure of the insert that the structure type is a solid line.

5. The method according to claim 1 , wherein the pulsed laser is controlled such when forming the negative surface structure of the insert that the structure type is a plurality of lines juxtaposed in the straight line.

6. The method according to claim 1 , wherein the pulsed laser is controlled such when forming the negative surface structure of the insert that the structure type is a plurality of spots juxtaposed in the straight line.

7. The method according to claim 1 , wherein the pulsed laser is controlled such when forming the negative surface structure in the insert that the structure types on the surface of the plastic component are oriented at an angle of −90° to +90° with respect to a load direction of the plastic component.

8. The method according to claim 1 , wherein a friction partner rubbed against the plastic component is a thermoplastic, glass or metallic component.

9. The method according to claim 1 , wherein the pulsed laser is an ultrashort pulsed laser and a physical limit of ultrashort pulses results from a thermal diffusion depth and an optical penetration depth of the pulsed laser.

10. The method according to claim 1 , wherein a pulse duration of the pulsed laser is between 10 and 20 picoseconds, and a pulsed laser beam of the pulsed laser, that is incident on the surface of the insert, has a high light intensity.

Assignees

• Gerresheimer Regensburg Gmbh

Inventors

• Schmitt Bernhard
• Will Dominik
• Schwab Daniel

Classifications

• B23K26/3576 Primary

  Diminishing rugosity, e.g. by grinding, polishing or smoothing · CPC title

• B29C45/372 Primary

  provided with means for marking or patterning, e.g. numbering articles · CPC title

• B29C2059/023

  Microembossing · CPC title

• B29C33/3857

  by making impressions of one or more parts of models, e.g. shaped articles and including possible subsequent assembly of the parts · CPC title

• B23K26/354

  by melting · CPC title