Plastic article or earthenware shaping or treating: apparatus – With apparatus assembly or dismantling means or with idle part – For extrusion or injection type shaping means
Patent
1987-08-25
1989-05-09
Chiesa, Richard L.
Plastic article or earthenware shaping or treating: apparatus
With apparatus assembly or dismantling means or with idle part
For extrusion or injection type shaping means
425547, 425556, 425577, B29C 4536
Patent
active
048284793
ABSTRACT:
A cavity insert for the injection side and a core insert for the ejection side of a mold are each shaped as a generally cylindrical, stepped body provided with circumferentially extending locking grooves and a liquid cooling or heating channel. Insert retainers and lifters having rotatable elements with locking tongues engaging the locking grooves clamp the inserts in the main mold frame. The main mold frame is provided with liquid conduits opening to opposite ends of the liquid channels so that the need for machining liquid conduits and channels for different inserts is avoided. Ejector tooling may be connected to the core insert for insertion and removal with it. The rotatable elements also have shoulders engageable with the inserts and may be axially moved to lift the inserts partly out of the mold frame to enable rapid changeover from one insert to another. Sliding wedges are used to releasably secure the ejector tooling to the master mold ejector plates. Improved ejector return pin assemblies are disclosed enabling the use of oversized inserts. A guided ejector system is also disclosed.
REFERENCES:
patent: 793895 (1905-07-01), Monroe
patent: 2554378 (1951-05-01), Nichols
patent: 2564615 (1951-08-01), Tallberg
patent: 2587070 (1952-02-01), Spillman
patent: 2733479 (1956-02-01), English
patent: 3044121 (1962-07-01), Wiskoff et al.
patent: 3103705 (1963-09-01), Letica
patent: 3113346 (1963-12-01), Bright
patent: 3134142 (1964-05-01), Canner
patent: 3161918 (1964-12-01), Zearbaugh
patent: 3466922 (1969-09-01), Phillips, Jr.
patent: 3645492 (1972-02-01), Edlis
patent: 3737268 (1973-06-01), Ryder
patent: 3986805 (1976-10-01), Haines
patent: 4202522 (1980-05-01), Hanas et al.
patent: 4364720 (1982-12-01), Ryder
patent: 4556377 (1985-12-01), Brown
patent: 4622001 (1986-11-01), Bright et al.
patent: 4655275 (1987-04-01), Worner
Chiesa Richard L.
Dybvig Roger S.
LandOfFree
Molding 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 Molding apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Molding apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-86586