Method of manufacturing multiple-layer molded articles of thermo

Details Method of manufacturing multiple-layer molded articles of thermo Method of manufacturing multiple-layer molded articles of thermo

1990-09-12

1992-03-03

Dawson, Robert A.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 50, 264255, 264510, 264570, 264572, B29C 6722

Patent

active

050930532

ABSTRACT:
A method of manufacturing multiple-layer molded articles with an outer skin of compact thermoplastic material and a core of foamed thermoplastic material includes initially introducing the material for the skin into a mold cavity in a quantity sufficient for the desired thickness of the skin and subsequently feeding into the mold cavity the material for the core to which the expanding agent has been added. During and/or after being introduced into the mold cavity, the core material containing expanding agent is temporarily subjected by means of an additional gas and/or a pressurized, low-boiling liquid to an active pressure which exceeds the gas pressure of the expanding agent. Subsequently, the additional gas or the low-boiling liquid is removed from the hollow space which is still free of skin material and core material.

REFERENCES:
patent: 4115491 (1978-09-01), Hanning
patent: 4208368 (1980-06-01), Egli
patent: 4247515 (1981-01-01), Olabisi
patent: 4435523 (1984-03-01), Ponzielli
patent: 4474717 (1984-10-01), Hendry
patent: 4507255 (1985-03-01), Shizawa
patent: 4657496 (1987-04-01), Ozeki et al.
patent: 4777186 (1988-10-01), Stang et al.

Affiliated with

Also associated with

Rating

Method of manufacturing multiple-layer molded articles of thermo does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of manufacturing multiple-layer molded articles of thermo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of manufacturing multiple-layer molded articles of thermo will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-270535