Method for production of an object and object produced by said method

• US 20060121251A1
• Filed: 06/23/2003
• Published: 06/08/2006
• Est. Priority Date: 06/21/2002
• Status: Abandoned Application

• Current Assignee: Weidmann Plastics Technology AG (Techniplas LLC)
• Original Assignee: Weidmann Plastics Technology AG (Techniplas LLC)
• Inventors: Ehrig, Frank, Sprotte, Matthias, Oberacher, Peter
• Application Number:
  US10/518,794
• Publication Number:
  US 20060121251A1
• Time in Patent Office: Days
• US Class Current: 428/172
• CPC Class Codes: B29C 2045/14729 decorations not in contact with injected material
• CPC Class Codes: B29C 45/1418 the inserts being deformed or preformed, e.g. by the injection pressure
• CPC Class Codes: B29C 45/14688 Coating articles provided with a decoration
• CPC Class Codes: B29K 2705/00 Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
• CPC Class Codes: B29K 2715/006 Glues or adhesives, e.g. hot melts or thermofusible adhesives
• CPC Class Codes: Y10T 428/24612 Composite web or sheet
• CPC Class Codes: Y10T 428/2462 with partial filling of valleys on outer surface

Abstract

The object (10, 10′) comprises a first layer (1), for example with a back injection of a second layer (2), whereby the first layer is plastically deformable and comprises a front face (1a) and a rear face (1b). The back injection of the first layer (1) takes place in an injection mould. Before the back injection, the first layer (1) is partly provided with a coating (4′) on the front face (1a) thereof and said coating is hardened. The first layer (1) is then placed in an injection mould (6). The first layer (1) is then back injected in the injection mould (6), thus forming the second layer (2), such that the first layer (1) is pressed with the front face (1a) thereof on an inner side (7) of the injection mould (6) and the hardened coating (4′) on the first layer (1) is deformed and at least partly pressed into the first layer (1). The coating (4′) is preferably applied by printing, for example by means of a screen printing method. The method permits the production of back-injected films with a front face (1a) which is structured or at least appears to be.

Claims

1. A method for production of an object (10, 10′

) with a first layer (1), which is bonded to a second layer (2), the first layer being plastically deformable and having a front side (1a) and a rear side (1b), and the bonding of the two first layer (1, 2) taking place in an injection mold, characterized by the following method steps;

a) the first layer (1) is partially provided with a coating (4′

) on its front side (1a),

b) the coating (4′

) is cured,

c) the first layer (1) is inserted into an injection mold (6),

d) the first layer (1) is pressed with its front side (1a) against an inner side (7) of the injection mold (6), the cured coating (4′

) changing the form of the first layer (1) and at least partially creating an impression in the first layer (1),

e) the product (10, id) is demolded.

2. The method as claimed in claim 1, characterized in that the coating (4′

) is impressed substantially completely into the first layer (1) and forms one or more depressions (3) in the latter (4′

).

3. The method as claimed in claim 1 or 2, characterized in that the first layer (1) is laminated in the injection mold (6) by injecting plastic behind it and the second layer (2) is thereby formed.

4. The method as claimed in one of claims 1 to 3, characterized in that a thermoplastic is injected behind the first layer (1).

5. The method as claimed in one of claims 1 to 4, characterized in that the first layer (1) is provided with an adhesion promoter (8) on its rear side (1b) before the in-mold lamination.

6. The method as claimed in one of claims 1 to 5, characterized in that the first layer (1) is a metal foil, in particular an aluminum foil or steel foil.

7. The method as claimed in one of claims 1 to 7, characterized in that the thickness (D) of the first layer (1) is 0.5 mm or less, preferably 0.1 mm or less.

8. The method as claimed in one of claims 1 to 6, characterized in that the thickness (D) of the first layer (1) is 0.1 to 0.3 mm.

9. The method as claimed in one of claims 1 to 8, characterized in that the coating (4′

) has a thickness (H) of from 2 to 1000 micrometers, preferably 2 to 100 micrometers.

10. The method as claimed in one of claims 1 to 9, characterized in that the thickness (H) of the coating (4′

) is 4 to 10 micrometers.

11. The method as claimed in one of claims 1 to 10, characterized in that the coating (4′

) is an imprint.

12. The method as claimed in one of claims 1 to 11, characterized in that the coating (4′

) is produced from one or more printing inks.

13. The method as claimed in claim 12, characterized in that the printing ink is at least partially translucent, transparent or semi-transparent.

14. The method as claimed in one of claims 1 to 13, characterized in that the coating (4′

) is applied by screen printing or pad printing.

15. The method as claimed in one of claims 1 to 14, characterized in that the coating (4′

) is cured thermally, with UV radiation, chemically or by exposure to air.

16. The method as claimed in claim 15, characterized in that the imprint (4′

) is cured at 70 to 100°

C., preferably approximately 800.

17. The method as claimed in one of claims 1 to 16, characterized in that the coating (4′

) comprises more than one layer.

18. The method as claimed in one of claims 1 to 18, characterized in that the coating (4) is at least partially removed, preferably dissolved away or pulled off.

19. The method as claimed in one of claims 1 to 18, characterized in that a decorative part or a trim molding for a motor vehicle is produced.

20. An object, produced by the method as claimed in claim 1, characterized in that the front side (1a) of the first layer (1) partially has a depression or depressions (3), which are deformations and in particular impressions created by a partial coating (4).

21. The object as claimed in claim 20, characterized in that the depression or depressions (3) are completely or partially filled with a printing ink.

22. The object as claimed in claim 20 or 21, characterized in that the coating (4) has an upper side (4a) which is arranged deeper than the front side (1a) of the first layer (1).

23. The object as claimed in one of claims 20 to 22, characterized in that the coating (4) is transparent or opaque.

24. The object as claimed in one of claims 20 to 23, characterized in that the coating (4) is a printing ink.

25. The object as claimed in one of claims 20 to 24, characterized in that the first layer (1) is a metal foil and has a thickness (D) which is less than 0.5 mm, preferably 0.1 to 0.3 mm.

26. The object as claimed in one of claims 20 to 25, characterized in that it is a decorative part or a trim molding for a motor vehicle.

27. The object as claimed in one of claims 20 to 26, characterized in that the second layer (2) is an injection-molded part.