Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Forming plural articles
Patent
1988-10-11
1990-11-20
Heitbrink, Jill L.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Forming plural articles
2643288, 26432811, 425562, 425572, 425588, 425589, B29C 4532, B29C 4538
Patent
active
049717472
ABSTRACT:
A system and method of cyclic injection molding a plastic material by controlling hold pressure and transferring plastic material to molding cavities of a stacked multi-parting injection molding system having desynchronized injection periods. The system includes left, left center, center, right center and right molding blocks disposed for movement with respect to each other along a common axis; and defining a left molding cavity between the left and the left center molding blocks, a left center molding cavity between the left center and the center molding blocks, a right center molding cavity between the center and the right center molding blocks, and a right molding cavity between the right center and the right molding blocks. The left center and right center molding blocks each contain a bifurcated runner system, confining means for confining injected plastic material therein, hold pressurizing means for hold pressurizing the confined injected plastic material in the bifurcated runner system and an inlet orifice, for feeding the adjacent molding cavities. The system further includes a clamping unit for moving axially the left molding block in relation to the right molding block and providing collective axial clamping force on the left, left center, right center and right molding cavities; a left locking system for maintaining the left and left center molding cavities in a closed position when the right center and right molding cavities in an open position; a right locking system for maintaining the right center and right molding cavities in a closed position when the left and left center and right molding cavities in a closed position when the left and left center molding cavities are in an open position; and an adjustable feed system encompassed by a combination of the left center and the right center molding blocks and a plasticizing system which has one or more outlet orifices.
REFERENCES:
patent: 3049757 (1962-08-01), Hagerborg
patent: 3417433 (1965-11-01), Teraoka
patent: 3707342 (1972-12-01), Lohmann
patent: 3709644 (1973-01-01), Farrell
patent: 3847525 (1974-11-01), Biefeldt et al.
patent: 4242073 (1980-12-01), Tsuchiya et al.
patent: 4400341 (1983-08-01), Sorensen
patent: 4464327 (1984-08-01), Sorensen
patent: 4539171 (1985-09-01), Sorensen
patent: 4734243 (1988-03-01), Kohama
patent: 4867938 (1989-09-01), Schad et al.
Husky Injection Molding Systems "Industrial Container Molding Systems", 1988, pp. 14-17.
Mannesmann-Meer, "High-Capacity Injection Moulding Machines Reaktomat".
Callan Edward W.
Heitbrink Jill L.
Primtec
LandOfFree
Hold pressurization by confining runner systems of adjustable fe does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hold pressurization by confining runner systems of adjustable fe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hold pressurization by confining runner systems of adjustable fe will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-453296