Process and apparatus for forming hollow structures from powdere

Details Process and apparatus for forming hollow structures from powdere Process and apparatus for forming hollow structures from powdere

1984-08-16

1988-10-11

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264255, 264308, 264309, 425471, B29C 4108

Patent

active

047769963

ABSTRACT:
A process is disclosed for forming a thermoplastic structure on the exterior surface of the heated mold form. A mold is heated to approximately two times the melting temperature of a thermoplastic material and particulate thermoplastic material then sprinkled onto the exterior surface of the heated mold. An adhesively bondable material may then be added to the semi-molten thermoplastic material structure. The mold is then cooled and the resulting thermoplastic structure removed.
An apparatus for practicing the above process comprising a mold form, heating system, and particulate thermoplastic material dispensing system is also disclosed.

REFERENCES:
patent: 3009209 (1961-11-01), Weinbrenner et al.
patent: 3186600 (1965-06-01), Guignard
patent: 3379591 (1968-04-01), Bradley
patent: 3744951 (1973-07-01), Szatkowski
patent: 4107244 (1978-08-01), Ochiai et al.
patent: 4308225 (1981-12-01), Magarian
patent: 4687531 (1987-08-01), Potoczky

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