Injection molded fastening article for use as a mold insert

• US 20040137192A1
• Filed: 12/23/2003
• Published: 07/15/2004
• Est. Priority Date: 12/23/2002
• Status: Abandoned Application

• Current Assignee: Aplix SA (Aplix)
• Original Assignee: Aplix SA (Aplix)
• Inventors: McVicker, Henry J.
• Application Number:
  US10/745,367
• Publication Number:
  US 20040137192A1
• Time in Patent Office: Days
• US Class Current: 428/100
• CPC Class Codes: B29C 33/14 against the mould wall
• CPC Class Codes: B29C 43/021 characterised by the shape of the surface
• CPC Class Codes: B29C 45/14065 Positioning or centering articles in the mould
• CPC Class Codes: B29C 45/14311 using means for bonding the coating to the articles B29C45/14795 takes precedence
• CPC Class Codes: B29C 45/14836 Preventing damage of inserts during injection, e.g. collapse of hollow inserts, breakage B29C45/14434 takes precedence
• CPC Class Codes: B29L 2031/729 Hook and loop-type fasteners
• CPC Class Codes: Y10T 24/27 including readily dissociable fastener having numerous, protruding, unitary filaments randomly interlocking with, and simultaneously moving towards, mating structure [e.g., hook-loop type fastener]
• CPC Class Codes: Y10T 428/24017 Hook or barb

Abstract

An injection molded insert having a field of integrally formed hooks on a surface can be used as a component of a molded article, such that the field of hooks will be on a surface of the molded article. The molded article having the mold insert as a component can be formed by various molding processes such as injection molding, compression molding, blow molding or rotational molding, or by forming from a moldable mass such as sprayable resins, epoxy-based resins, or fiberglass-based resins.

Claims

1. An injection molded insert for use as a component of a molded article made from a molten plastic, said insert comprising

a substantially rigid wall member, said substantially rigid wall member having opposed first and second surfaces, said first surface having a field of integrally molded hooks formed on at least a portion thereof, and

means for engaging molten plastic during the manufacture of the molded article from molten plastic, such that the molten plastic can flow around and be engaged by said engaging means during the manufacture of the molded article, such that said insert becomes a component of said molded article with said field of integrally molded hooks on a surface of said molded article.

2. The injection molded insert of claim 1 wherein said engaging means comprises a portion of said wall member extending beyond said field of hooks, said extending wall portion comprising means for receiving molten plastic.

3. The insert of claim 2 wherein said means for receiving molten plastic comprises a plurality of orifices in said extending wall portion, such that molten plastic can flow into said orifices from said second surface of said extending wall portion to said first surface of said extending wall portion to engage said wall portion.

4. The insert of claim 2 wherein said receiving means comprises a plurality of grooves on at least said first surface of said extending wall portion, such that molten plastic can flow into said grooves to engage said extending wall portion.

5. The insert of claim 1 wherein said engaging means comprises at least one projection extending from said wall member, such that molten plastic can flow around and be engaged by said at least one projection.

6. The injection molded insert of claim 1 further comprising an integrally formed injection molded ridge surrounding said field of integrally formed hooks.

7. The injection molded insert of claim 1 wherein said first surface comprises a plateau and said field of integrally formed hooks is formed on said plateau.

8. The injection molded insert of claim 1 wherein said insert is made from a material selected from the group consisting of polypropylene, polypropylene copolymer, glass filled polypropylene, high impact polystyrene, acrylonitrite-butadiene-styrene, nylon, high density polyethylene, linear low density polyethylene, polycarbonate, and thermoplastic olefin polymer.

9. A method of making a molded article from a molten plastic, the molded article having an integral field of molded hooks, comprising

providing an injection molded insert for use as a component of the molded article, said insert comprising a substantially rigid wall member, said substantially rigid wall member having opposed first and second surfaces, said first surface having a field of integrally molded hooks formed on at least a portion thereof, and said insert having means for engaging molten plastic during the molding of the molded article, such that the molten plastic can flow around and be engaged by said engaging means,

positioning said injection molded insert in a mold such that said field of integrally formed hooks is at a position corresponding to the desired location of the field of hooks on the finished molded article, and

adding molten plastic to said mold in accordance with a molding technique such that said molten plastic flows around and engages said engaging means, and such that said insert becomes a component of said molded article with said field of integrally molded hooks on a surface of said molded article.

10. The method of claim 9 wherein said molding technique is selected from the group consisting of injection molding, compression molding, rotational molding, and blow molding.

11. The method of claim 9 wherein said insert is made from a material selected from the group consisting of polypropylene, polypropylene copolymer, glass filled polypropylene, high impact polystyrene, acrylonitrite-butadiene-styrene, nylon, high density polyethylene, linear low density polyethylene, polycarbonate, and thermoplastic olefin polymer.

12. The method of claim 9 wherein said mold includes a recess for receiving said insert and said insert is positioned in said mold within said recess.

13. A method of making a molded article from a moldable mass, the molded article having an integral field of molded hooks, comprising

providing an injection molded insert for use as a component of the molded article, said insert comprising a substantially rigid wall member, said substantially rigid wall member having opposed first and second surfaces, said first surface having a field of integrally molded hooks formed on at least a portion thereof, and said insert having means for engaging a moldable mass during the molding of the molded article, such that the moldable plastic can flow around and be engaged by said engaging means,

positioning said injection molded insert in a mold such that said field of integrally formed hooks is at a position corresponding to the desired location of the field of hooks on the finished molded article,

adding the moldable mass to said mold such that said moldable mass flows around and engages said engaging means, and such that said insert becomes a component of said molded article with said field of integrally molded hooks on a surface of said molded article.

14. The method of claim 13 wherein said moldable mass is selected from the group consisting of sprayable resins, epoxy-based resins, and fiberglass-based resins.

15. The method of claim 14 wherein said moldable mass is applied by spraying.

16. The method of claim 14 wherein said moldable mass is applied by spreading.

17. The method of claim 13 wherein said insert is made from a material selected from the group consisting of polypropylene, polypropylene copolymer, glass filled polypropylene, high impact polystyrene, acrylonitrite-butadiene-styrene, nylon, high density polyethylene, linear low density polyethylene, polycarbonate, and thermoplastic olefin polymer.

18. The method of claim 13 wherein said mold includes a recess for receiving said insert and said insert is positioned in said mold within said recess.

20. The molded article of claim 16, said molded article being selected from the group consisting of an injection molded article, a compression molded article, a rotational molded article, and a blow molded article.

19. A molded article made from a moldable plastic, said molded article having an injection molded insert as a component thereof, said injection molded insert comprising a substantially rigid wall member, said substantially rigid wall member having opposed first and second surfaces, said first surface having a field of integrally molded hooks formed on at least a portion thereof, and said insert having means for engaging moldable plastic during the molding of the molded article, such that the moldable plastic can flow around and be engaged by said engaging means, said field of molded hooks being integral with a surface of said molded article.

21. The molded article of claim 19 wherein said injection molded insert comprises an integrally formed injection molded ridge surrounding said field of integrally formed hooks.

22. The molded article of claim 19 wherein said first surface comprises a plateau and said field of integrally formed hooks is formed on said plateau.

23. The molded article of claim 19 wherein said insert is made from a material selected from the group consisting of polypropylene, polypropylene copolymer, glass filled polypropylene, high impact polystyrene, acrylonitrite-butadiene-styrene, nylon, high density polyethylene, linear low density polyethylene, polycarbonate, and thermoplastic olefin polymer.

24. The molded article of claim 19 wherein said moldable plastic is selected from the group consisting of sprayable resins, epoxy-based resins, and fiberglass-based resins.