Method for making foamed blown ware

Details Method for making foamed blown ware Method for making foamed blown ware

1977-04-22

1978-10-17

Husar, Francis S.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 403, 264 89, 264DIG1, 264DIG14, 425 4R, 425522, B29G 702, B29D 2700, B29F 500

Patent

active

041209249

ABSTRACT:
Plastic blown ware is made by expanding a molten plastic tubular blank into contact with the wall of a mold cavity. This invention evacuates air from the part of the cavity around the outside of the blank to increase the pressure differential across the tube wall during the blowing period and to help prevent the plastic from pulling away from the cavity wall during cooling and shrinkage. The invention makes blown ware by compounding the plastic with a blowing agent and by controlling the bubble size and wall thickness by changing the pressure on opposite sides of the blown article to whatever pressure will permit the gas bubbles and the plastic to expand to the desired size during cooling and setting of the plastic.

REFERENCES:
patent: 2467000 (1949-04-01), Samuelson
patent: 3078508 (1963-02-01), Martin, Jr.
patent: 3583036 (1971-06-01), Brown
patent: 3588952 (1971-06-01), Wilson et al.
patent: 3667887 (1972-06-01), Reiss
patent: 3814783 (1974-06-01), Dardaine et al.
patent: 3901958 (1975-08-01), Doll
patent: 3970732 (1976-07-01), Slaats
patent: 4026982 (1977-05-01), Dardaine et al.
patent: 4034036 (1977-07-01), Farrell
Blow Molding Expandable Polystyrene, Goldsberry et al., SPE Journal, Apr. 1962, pp. 448-454.
Blow Foam Bottles, Cleereman et al., Plastics Technology, Oct. 1969, pp. 48-51.

Affiliated with

Also associated with

Rating

Method for making foamed blown ware 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 for making foamed blown ware, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for making foamed blown ware will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-375665