Tubular pultruded member having uniform wall thickness

Details Tubular pultruded member having uniform wall thickness Tubular pultruded member having uniform wall thickness

1992-12-21

1994-11-22

Lesmes, George F.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428 361, 428 3691, 428120, 428178, 264171, 264174, 156166, 156180, 156433, B29D 2200

Patent

active

053667735

ABSTRACT:
The method of making a tubular pultruded member having a longitudinal axis and a substantially uniform wall thickness throughout includes providing a heated die with a mandrel extending through the forming die section and a bath of liquid polymer, simultaneously pulling continuous reinforcing fibers and at least one carrier tape with wall spacers through the liquid polymer bath around the mandrel and into and through the heated die to shape and cure the liquid polymer into a tubular pultruded member, the wall spacers having a thickness equal to the uniform distance between the outside surface of the mandrel and the inside surface of the die.

REFERENCES:
patent: 2751320 (1956-06-01), Jacobs et al.
patent: 3470051 (1969-09-01), Meyer
patent: 4300321 (1981-11-01), Preis et al.
patent: 5092950 (1992-03-01), Spoo et al.
patent: 5264170 (1993-11-01), Strachan
Patent Abstracts of Japan vol. 17, No. 117(M-1378)11 11 Mar. 1993 and JP-A-04 301-436 (SekisuiChem) 26 Oct. 1992.

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