Polymer blanket for use in multi-cavity molding operations

• US 20070054090A1
• Filed: 11/16/2004
• Published: 03/08/2007
• Est. Priority Date: 11/16/2004
• Status: Abandoned Application

• Current Assignee: Owens Corning Intellectual Capital, LLC (Owens Corning)
• Original Assignee: Owens Corning Intellectual Capital, LLC (Owens Corning)
• Inventors: Rockwell, Anthony
• Application Number:
  US10/989,613
• Publication Number:
  US 20070054090A1
• Time in Patent Office: Days
• US Class Current: 428/136
• CPC Class Codes: B32B 2262/0207 Elastomeric fibres
• CPC Class Codes: B32B 2262/06 Vegetal fibres
• CPC Class Codes: B32B 2262/101 Glass fibres
• CPC Class Codes: B32B 2262/103 Metal fibres
• CPC Class Codes: B32B 2262/106 Carbon fibres, e.g. graphite fibres
• CPC Class Codes: B32B 2262/12 Conjugate fibres, e.g. core/sheath or side-by-side
• CPC Class Codes: B32B 27/12 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 27/18 characterised by the use of special additives
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/34 comprising polyamides
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: B32B 3/10 characterised by a discontinuous layer, i.e. formed of separate pieces of material
• CPC Class Codes: B32B 5/028 Net structure, e.g. spaced apart filaments bonded at the crossing points
• CPC Class Codes: B32B 7/04 Interconnection of layers
• CPC Class Codes: Y10T 428/192 Sheets or webs coplanar
• CPC Class Codes: Y10T 428/24314 Slit or elongated

Abstract

A polymer blanket includes a body having a first molding panel, a second molding panel and a mesh section connecting the first and second molding panels. In addition a method of making a polymer blanket for use in multi-cavity molding operations includes the steps of determining how many cavities are in a multi-cavity mold, determining the required dimensions for each panel of polymer blanket to be molded in each cavity and forming a polymer blanket with a required panel of desired dimensions for each mold cavity and a mesh section for connecting the required panels together.

Claims

1. A polymer blanket, comprising:

a body including a first molding panel, a second molding panel and a mesh section connecting said first molding panel to said second molding panel.

3. The polymer blanket of claim 1, wherein said body is constructed from a polymer material including thermosetting fibers.

4. The polymer blanket of claim 1, wherein said body is constructed from a polymer material including both thermoplastic and thermosetting fibers.

5. The polymer blanket of claim 1, wherein said body is constructed from a polymer material including bicomponent fibers.

6. The polymer blanket of claim 1, wherein said body is constructed from a polymer material selected from a group consisting of polyolefin, polyester, polypropylene, polyethylene, nylon, rayon, polyethylene terephthalate, polybutylene terephthalate and mixtures thereof.

7. The polymer blanket of claim 6, wherein said polymer material includes reinforcing fibers selected from a group consisting of glass fibers, metal fibers, mineral fibers, carbon fibers, graphite fibers, natural fibers and mixtures thereof.

8. The polymer blanket of claim 7, wherein said reinforcing fibers have a diameter of between about 5 and about 50 microns and a length of between about 12.6 and 75.6 mm.

9. The polymer blanket of claim 1, wherein said mesh section includes a series of expandable expansion ribs.

10. The polymer blanket of claim 9, wherein each said expansion rib includes a first segment and a second segment, said first segment being connected to said second segment by a first living hinge, said first segment being connected to said first molding panel by a second living hinge and said second segment being connected to said second molding panel by a third living hinge.

11. The polymer blanket of claim 1, wherein said mesh section includes alternating rows of (a) straight slits and (b) openings with extension slits defining a four-way living hinge at a convergence of adjacent straight slits and said openings.

12. The polymer blanket of claim 1, wherein said body comprises an elongated web.

13. The polymer blanket of claim 1, wherein said body comprises a blank of predetermined dimension.

2. The polymer blanket of claim 2 wherein said body is constructed from a polymer material including thermoplastic fibers.

14. A method of making a polymer blanket for use in multi-cavity molding operations, comprising:

determining how many cavities are in a multi-cavity mold;

determining required dimensions for each panel of polymer blanket to be molded in each cavity; and

forming a polymer blanket with a required panel of desired dimensions for each mold cavity and a mesh section for connecting said required panels together.

15. The method of claim 14 further including constructing said polymer blanket from a polymer material including thermoplastic fibers.

16. The method of claim 14 further including constructing said polymer blanket from a polymer material including thermosetting fibers.

17. The method of claim 14 further including constructing said polymer blanket from a polymer material including thermoplastic and thermosetting fibers.

18. The method of claim 14 further including constructing said polymer blanket from a polymer material including bicomponent fibers.

19. The method of claim 14 further including constructing said polymer blanket from a polymer material selected from a group consisting of polyolefin, polyester, polypropylene, polyethylene, nylon, rayon, polyethylene terephthalate, polybutylene terephthalate and mixtures thereof.

20. The method of claim 19 further including adding reinforcing fibers to said polymer material and selecting said reinforcing fibers from a group consisting of glass fibers, metal fibers, mineral fibers, carbon fibers, graphite fibers, natural fibers and mixtures thereof.

21. The method of claim 14 further including making said mesh section to include a series of expandable expansion ribs.

22. The method of claim 21, further including making each said expansion rib to include a first segment and a second segment, said first segment being connected to said second segment by a first living hinge, said first segment being connected to said first molding panel by a second living hinge and said second segment being connected to said second molding panel by a third living hinge.

23. The method of claim 14, further including making said mesh section to include alternating rows of (a) straight slits and (b) openings with extension slits defining a four-way living hinge at a convergence of adjacent straight slits and said openings.

24. A method of reducing waste material when molding a polymer blanket in a multi-cavity mold, comprising:

providing said polymer blanket with a molding panel for each cavity in said mold; and

providing said polymer blanket with a mesh section connecting at least two of said molding panels together.

25. A method of charging a multi-cavity mold with a polymer blanket including multiple molding panels interconnected by a mesh section, said method comprising:

opening said multi-cavity mold;

positioning one of said multiple molding panels for molding in each of said multiple cavities; and

closing said multi-cavity mold.

26. The method of claim 25, wherein said positioning step includes expanding said mesh section of said polymer blanket so as to provide necessary spacing between said multiple molding panels in order to properly position said multiple molding panels for molding in said multiple cavities.