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Method for manufacturing glass-fibre reinforced plastic container

  • US 5,547,533 A
  • Filed: 12/08/1994
  • Issued: 08/20/1996
  • Est. Priority Date: 05/24/1991
  • Status: Expired due to Term
First Claim
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1. Method of making a reinforcing body of fibre strands for insertion in a casting mould for casting of a fibre-reinforced cylinder with one end closed to be included in a plastic tank, said reinforcing body being built up with its open end facing downwards on a preshaping form, by several layers of both longitudinal and transverse reinforcing fiber strands being wound on the form, whereupon the reinforcing strands of the reinforcing body are sprayed with a meltable resin powder, which after heat treatment bonds the reinforcing strands to each other so that a pre-fabricated reinforcing body is formed, characterized by the following steps:

  • the reinforcing body (D) for casting a cylinder (10), the open end of which is made as a male end (20), is built up by first winding at least one layer (35) of longitudinal reinforcing strands closely adjacent to each other on the pre-shaping form (50) to define a longitudinal reinforcement;

    winding at least one layer (33) of transverse reinforcing strands closely adjacent to each other on the longitudinal reinforcement to define a transverse reinforcement for said male end (20), and winding an additional layer (29) of longitudinal reinforcing strands on the transverse reinforcement, said additional layer of longitudinal reinforcing strands being collected in groups (30) of densely lying reinforcing strands with a pre-determined spacing (F) between the groups to provide channel-shaped spaces (31) between said groups (30),the reinforcing body (C) for casting of a cylinder (12), the open end of which is to be formed as a female end (22), is built up by first winding a layer (36) of longitudinal reinforcing strands on the pre-shaping form (50), said longitudinal reinforcing strands being collected into groups (37) of densely lying reinforcing strands with a pre-determined spacing (F) between the groups to provide channel-shaped spaces (38) between said groups (37);

    winding at least one layer (34) of transverse reinforcing strands closely adjacent to each other on the groups (37) of densely lying longitudinal reinforcing strands to define a transverse reinforcement for said female end (22); and

    winding at least one additional layer (32) of longitudinal reinforcing strands closely adjacent to each other on the last mentioned transverse reinforcement.

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