Plastic article or earthenware shaping or treating: apparatus – Shaping surface including means to release or remove product... – By movable ejector means entering mold cavity
Patent
1989-01-23
1991-01-01
Chiesa, Richard L.
Plastic article or earthenware shaping or treating: apparatus
Shaping surface including means to release or remove product...
By movable ejector means entering mold cavity
249 67, 264335, 425556, B29C 4542
Patent
active
049814303
ABSTRACT:
A pneumatically operated mold ejection apparatus using a pneumatic pressure source exterior to a multiplate injection molding tool. The pressure source operates at least one knock-out pin disposed within a molding plate. Said pin is connected to a pneumatic piston spring loaded against a stop positioning the pin flush with the inner wall of the cavity during injection of plastic. The stop also positions the piston so that compressed air can reach the piston's surface when the pressure source is actuated. The piston includes a circumferential annular groove containing an O-ring for pneumatic sealing. The back side of the molding plate includes pneumatic channels between the cylinder and their intersection with a complimentary channel in the backing plate. These channels connect the system to the pressure source, and are surrounded by an O-ring trapped between the molding and backing plates for pneumatic sealing.
REFERENCES:
patent: 3327355 (1967-06-01), Carlin
patent: 3666229 (1972-05-01), Carrel-Billiard
patent: 3871611 (1975-03-01), Taketa
patent: 3892512 (1975-07-01), Diehl
patent: 3914086 (1975-10-01), Hujik
patent: 3952991 (1976-04-01), Schneider
patent: 4375948 (1983-03-01), von Holdt
patent: 4497624 (1985-02-01), Brun et al.
patent: 4531703 (1985-07-01), Underwood
patent: 4620958 (1986-11-01), Wiechard
patent: 4653997 (1987-03-01), Sheffield et al.
patent: 4686076 (1987-08-01), Dromigny et al.
Chiesa Richard L.
Van Der Wall Robert J.
LandOfFree
Pneumatically operated mold ejection 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 Pneumatically operated mold ejection apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pneumatically operated mold ejection apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1993442