INJECTION BLOW MOLDING PROCESS AND ARTICLE
First Claim
1. A process for making a hollow thermoplastic article comprising the steps of:
- placing a sock preform comprising a first material composition about a core pin;
injection molding a molten parison comprising a second material composition which is different than the first material composition, into an injection mold cavity about the sock preform to produce an injection preform having an inner layer of the first material composition and an outer layer of the second material composition; and
blow molding the injection preform to produce a hollow thermoplastic article comprising an interior surface of the first material composition and an external surface of the second material composition.
3 Assignments
0 Petitions
Accused Products
Abstract
Various embodiments of a process for making hollow thermoplastic articles are provided. In one embodiment, a process for producing hollow thermoplastic article includes placing a sock preform of a first polymer composition about a core pin and injection molding a molten parison of a second polymer composition that is different than the first polymer composition into an injection mold cavity and onto the sock perform. The injection molding process produces an injection preform having two different material compositions. The process further include blow molding the injection preform to produce a hollow thermoplastic article having an interior surface of the first polymer composition and an exterior surface of the second polymer composition.
11 Citations
32 Claims
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1. A process for making a hollow thermoplastic article comprising the steps of:
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placing a sock preform comprising a first material composition about a core pin; injection molding a molten parison comprising a second material composition which is different than the first material composition, into an injection mold cavity about the sock preform to produce an injection preform having an inner layer of the first material composition and an outer layer of the second material composition; and blow molding the injection preform to produce a hollow thermoplastic article comprising an interior surface of the first material composition and an external surface of the second material composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 21, 22, 23, 24, 25)
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19. A process for injection blow molding a plurality of hollow thermoplastic articles, the process comprising the steps of:
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loading a sock preform of a first material composition onto a first core pin; injection molding a molten parison of a second material composition onto a second core sock of the first material composition and supported by a second core pin; blow molding an injection preform comprising an inner layer of the first material composition and an outer layer of the second material composition, the preform being supported by a third core pin; and wherein at least a portion of each step is carried out simultaneously. - View Dependent Claims (20, 26)
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27. A hollow thermoplastic article comprising:
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an interior surface of an inner layer comprising a first material composition; an exterior surface of an outer layer comprising a second material composition different than the first material composition; and wherein at least one of the inner layer and outer layer extends along a portion of the hollow thermoplastic article. - View Dependent Claims (28, 29, 30, 31)
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32. A hollow thermoplastic article comprising:
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an interior surface formed by an inner layer of a first material composition; an exterior surface formed by an outer layer of a second material composition different than the first material composition; and wherein the outside surface of the hollow thermoplastic article comprises a vestige and the outside surface is otherwise substantially seamless.
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Specification