Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Patent
1995-06-07
1996-08-06
Heitbrink, Jill L.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
264 406, 264 69, 2643288, 26432814, 26432819, B29C 4576, B29C 4518
Patent
active
055430929
ABSTRACT:
A method is disclosed for exerting a stress tensor on moldable material in a mold cavity. The method involves the steps of feeding a moldable material from a feeder to an accumulator. The material is preferably melted prior to accumulation within the accumulator so as to form a material flow. After at least a portion of the accumulator is filled, an oscillatory force is applied on the molten material in accordance with a predetermined program. A predetermined amount of material is then fed from the accumulator to a mold cavity through a mold inlet. The temperature of the mold is controlled in accordance with a predetermined program while an oscillatory force is applied to the material. The solidified article is then removed from the mold.
REFERENCES:
patent: 2575162 (1951-11-01), Steinberg
patent: 2686934 (1954-08-01), D'Amore
patent: 3054143 (1962-09-01), Stenger
patent: 3103729 (1963-09-01), Flamand
patent: 3158901 (1964-12-01), Westover
patent: 3162703 (1964-12-01), Eyles
patent: 3191234 (1965-06-01), Hendry
patent: 3375553 (1966-03-01), Criss
patent: 3483288 (1969-12-01), Paulson
patent: 3523147 (1970-08-01), Hold et al.
patent: 3616495 (1971-11-01), Lemelson
patent: 3646990 (1972-03-01), Cross
patent: 3819313 (1974-06-01), Josephsen et al.
patent: 3833694 (1974-09-01), Hughes
patent: 3847525 (1974-11-01), Bielfeldt et al.
patent: 3975128 (1976-08-01), Schl uter
patent: 3996330 (1976-12-01), Jones et al.
patent: 4014969 (1977-03-01), Gorter et al.
patent: 4029454 (1977-06-01), Monnet
patent: 4120922 (1978-10-01), Lemelson
patent: 4124308 (1978-11-01), Sokolow
patent: 4210616 (1980-07-01), Eckardt et al.
patent: 4288398 (1981-09-01), Lemelson
patent: 4314963 (1982-02-01), Boden et al.
patent: 4315726 (1982-02-01), Semerdjiev et al.
patent: 4386902 (1983-06-01), Carlstein et al.
patent: 4442070 (1984-04-01), Proksa et al.
patent: 4469649 (1984-09-01), Ibar
patent: 4473516 (1984-09-01), Hunerberg
patent: 4542054 (1985-09-01), Fillmann
patent: 4720364 (1988-01-01), Kauffmann et al.
patent: 4722679 (1988-02-01), Farrell
patent: 4851167 (1989-07-01), Marc
patent: 4925161 (1990-05-01), Allan et al.
patent: 5043129 (1991-08-01), Sorensen
patent: 5059368 (1991-10-01), Allan et al.
patent: 5069840 (1991-12-01), Arnott
patent: 5132549 (1992-07-01), Allan et al.
patent: 5156858 (1992-10-01), Allan et al.
patent: 5160466 (1992-11-01), Allan et al.
patent: 5192555 (1993-03-01), Arnott
patent: 5213732 (1993-05-01), Jevtic
Ibar, J. P., "Instability in the Rubbery State Revealed by D.S.C. of Rheomolded.RTM. Polystyrene Samples", Polymer Communications, vol. 24, pp. 331-335 (Nov. 1983).
Ibar, J. P., "Rheomolding: A New Process to Mold Polymeric Materials" Polym.-Plast. Technol. Eng., vol. 17, No. 1, pp. 11-44 (1981).
Shock and Vibration Handbook, 2d, Ed. C. M. Harris and C. E. Crede, pp. 33(6)-33(7) (1976).
Plastics Mold Engineering, Rev. Ed., ed. J. H. DuBois and W. I. Pribble, pp. 438-451 (1966).
Menges, G., et al., "`Self-Reinforcing` Plastics: A New Approach to High-Performance Resins", Modern Plastics International, pp. 38-39 (Oct. 1981).
Allan, P., et al., "Producing Void-Free Thick-Section Thermoplastic and Fibre Reinforced Thermoplastic Mouldings", Plastics & Rubber International, vol. 9, No. 2, pp. 33-37 (Apr. 1984).
Allan, P. S., et al., "The Effect of Oscillating Packing Pressures on the Residual Stresses in Thick-Section Polyethylene Injection Mouldings", Plastics and Rubber Processing and Applications, vol. 5, No. 1, pp. 71-78 (1985).
Allan, P. S., et al., "Development and Application of Multiple Live-Feed Moulding for the Management of Fibres in Moulded Parts", Composites Manufacturing, vol. 1, No. 2, pp. 79-84 (Jun. 1990).
Allan, P. S., et al., "Multiple Live-Feed Injection Moulding", Plastics and Rubber Processing and Applications, vol. 7, No. 1, pp. 3-10 (1987).
Gibson, J. R., et al., "The Multiple Live-Feed Moulding of DMCs", Composites Manufacturing, vol. 1, No. 3, pp. 183-190 (Sep. 1990).
Allan, P. S., et al., "Shear Controlled Orientation in Extrusion", Wolfson Center for Materials Processing, Brunel University, Uxbridge, Middlesex UB8 3PH, UK, pp. 1-9.
Cavic, M., et al., "Precision Moulding of Short Glass Fibre Reinforced Polypropylene Rings", Wolfson Center for Materials Processing, Brunel University, Uxbridge, Middlesex UB8 3PH, UK.
Gibson, J. R., et al., "Recent Developments in Shear Controlled Orientation of Reinforcement in Polymer Matrix Mouldings", Wolfson Center for Materials Processing, Brunel University, Uxbridge, Middlesex, pp. 1-6.
Ultra-High Modulus Polymers, ed. A. Ciferri and I. M. Ward, pp. 325-333.
Rueda, D. R., et al., "X-Ray Diffraction Study of Die Drawn Poly(Aryletherketone (PEEK)", Polymer Communications, vol. 24, p. 258 (Sep. 1983).
The Scorim.TM. Process For Injection Molding, Scortec Inc., Gulph Mills, PA, Product Brochure (Aug. 1991).
Eureka, "Shearing Pistons Treble Strength of Injection Mouldings", p. 21 (Mar. 1991).
Frados, Joel, Plastics Engineering Handbook 4th edition, 1976, pp. 90-93.
Multiple live-feed processing as a route for fiber management in composite materials, P. S. Allan and M. J. Beavis, Series No. III, International Conference on New Materials and their Applications, University of Warwick, 1990.
Heitbrink Jill L.
Solomat Partners L.P.
LandOfFree
Method for exerting stress tensor to molding material 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 for exerting stress tensor to molding material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for exerting stress tensor to molding material will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2189085