Method and apparatus for injection molding of multilayer preform

Details Method and apparatus for injection molding of multilayer preform Method and apparatus for injection molding of multilayer preform

1989-01-25

1991-02-05

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264245, 264255, 26432812, 425130, 425533, B29C 4516

Patent

active

049903012

ABSTRACT:
A method of and apparatus for forming multiple layer preforms wherein the various layers may be varied as to number, material, thickness and position in the preform by controlling the injection of the specific materials as to timing, quantity and rate of delivery. Most specifically, a featured aspect is the ability to simultaneously deliver to an injection nozzle and through such injection nozzle into a preform mold cavity two or more molten plastic materials simultaneously. This is possible by way of a multiple gate nozzle and a plurality of separately operable metering pots all controlled by way of a timing device. The timing device may also control the rate of the dispensing an individual material from each of the metering pots.

REFERENCES:
patent: 4052497 (1977-11-01), Monnet
patent: 4525134 (1985-06-01), McHenry et al.
patent: 4657596 (1987-04-01), Ozeki et al.
patent: 4798697 (1989-01-01), Nohara et al.

Affiliated with

Also associated with

Rating

Method and apparatus for injection molding of multilayer preform 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 and apparatus for injection molding of multilayer preform, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for injection molding of multilayer preform will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-9335