Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means to heat or cool
Patent
1982-03-25
1984-05-29
Czaja, Donald E.
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With means to heat or cool
425572, 425573, B29F 108
Patent
active
044512244
ABSTRACT:
An improved device for making plastic articles from resin and an improved runner block assembly for a mold for making plastic articles from resin have been made by providing a runner block assembly having at least one channel wherein the channel has a cross-section with two opposite sides having a length substantially less than the two other sides thereby forming a thin, flat channel sufficient to provide shear resistance resulting from forcing resin through the channel; means for connecting the channel to a plurality of mold cavities, and means for supplying resin to the channel. Plastic articles are made from resin in a heated mold assembly wherein heated, flowable resin is passed under pressure from a resin supply means through a flow passageway to a mold cavity, the improvement comprising, passing the heated, flowable resin into a runner block assembly wherein the flow passageway is at least one channel connected to the resin supply means, the channel extending from the resin supply means to the mold cavity and having a large heated surface with a thin, flat cross-section sufficient to provide shear resistance resulting from forcing the resin under pressure through the channel; heating the resin in the channel of the runner block assembly at a temperature of about at least as high as the temperature of the mold but less than the decomposition temperature of the resin; and passing the heated resin into the mold cavity. A typical resin is a phenolic resin containing 20% glass fiber filler.
REFERENCES:
patent: 2524858 (1950-10-01), Thomas
patent: 2571766 (1951-10-01), Saulino
patent: 2894284 (1959-07-01), Allison et al.
patent: 3428289 (1969-02-01), Heckrotte et al.
patent: 3520026 (1970-07-01), Stidham et al.
patent: 3561061 (1971-02-01), Bucy
patent: 3568973 (1971-03-01), Rau
patent: 3591897 (1971-07-01), Perras
patent: 3623692 (1971-11-01), Buhrer
patent: 3779506 (1973-12-01), Adams
patent: 3819312 (1974-06-01), Arpajian
patent: 3871806 (1975-03-01), Leunig
patent: 3972663 (1976-08-01), Taniguchi
patent: 3981661 (1976-09-01), Taylor
patent: 4108956 (1978-08-01), Lee
patent: 4126292 (1978-11-01), Saeki et al.
patent: 4212626 (1980-07-01), Gellert
patent: 4238181 (1980-12-01), Dannels
patent: 4239476 (1980-12-01), Somberg
patent: 4249882 (1981-02-01), Koch et al.
patent: 4298332 (1981-11-01), Aoki
Plastics Technology, 27, No. 4, p. 22, (Apr. 1981) "Hollow-Sprue Process Thermoset Molding Cycles".
Prost, Plastics Technology, 27, No. 5, pp. 67-69, (May 1981) "Hyperthermal Runner System".
Czaja Donald E.
Fischbach V.
General Electric Company
Reams Radford M.
Weidner Frederick P.
LandOfFree
Mold device for making plastic articles from resin does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mold device for making plastic articles from resin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mold device for making plastic articles from resin will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1395371