Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Flash or sprue removal type
Patent
1993-12-10
1995-07-25
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Flash or sprue removal type
264163, 264334, 425292, 425298, 425441, 425554, 425DIG51, B29C 4538
Patent
active
054359562
ABSTRACT:
An apparatus and method for degating an injection mold high aspect ratio injection mold plastic article includes a pair of spring biased mold inserts locatable against opposed sides of a runner following initial mold opening movement and wherein one of the pair of mold inserts has a cutting edge and a first operative position engageable with the part following solidification thereof for supporting the part within the mold along an edge portion thereof that is joined to the runner; and wherein the other of the pair of mold inserts has a cutting edge that cooperates with the cutting edge of the one mold insert following mold opening to cut the runner from the part during the ejection of the solidified part. The method includes the steps of forming an injection molded part between first and second mold parts when they are in a closed position by directing molten plastic through a runner leading to an edge portion of the part; clamping the part on one side of the runner prior to opening of the molds and delaying ejection of the part from the mold during the aforesaid clamping of the runner and then moving the first and second inserts in opposite directions across the runner for shearing the runner from the part along the one edge portion thereof.
REFERENCES:
patent: 3737271 (1973-06-01), Novak
patent: 4446088 (1984-05-01), Daines
patent: 4647275 (1987-03-01), Lundquist
patent: 4738613 (1988-04-01), Eichlseder et al.
patent: 5069832 (1991-12-01), Okumura et al.
Davis Robert B.
Textron Acustar Plastics, Inc.
Woo Jay H.
LandOfFree
In-mold degating method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with In-mold degating method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and In-mold degating method and apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-737933