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US 4,338,070 AGranted
Apparatus for molding reinforced resin products
OwnerPier L. Navainventor
Life of this patent
Estimating the term…
Abstract
The procedure is actuated by the apparatus shown in FIG. 3, part B of the mold of which, relatively movably, holds an elastically deformable chamber C which is caused to expand by a fluid under pressure. Into cavity A1 of relatively fixed mold A textile reinforcement D and some liquid resin is placed. If the product to be molded has projecting parts A1, part B is provided with pushers 12 having shaped ends 14, actuated by a pressurized fluid to push forward a part of woven armor D into cavity A4 before causing chamber C to expand. When this condition occurs, the liquid resin is pressed into the structure of reinforcement D and, in solidifying, takes on the shape of cavity A1 of the mold.
Claims4
Apparatus for molding reinforced resin products, comprising:
- a female mold part having a shaped inner surface complementary to the outline of a product to be molded, which outline includes at least one localized projection reproduced in the negative by said shaped surface of said female mold part, said female mold part having adjacent to and coextensive with its shaped inner surface a textile reinforcement for the product to be molded;
- and a male mold part movable in and out of said female mold part with substantial clearance and having a shaped outer surface dissimilar to said product outline, said male mold part being encompassed by an attached elastic element which, in use, is outwardly deformable by a pressurized fluid introduced between it and said male mold part in order to force liquid resin occupying said substantial clearance into said textile reinforcement and produce tension in said textile reinforcement by pressing against it, said male mold part including a slidable pusher operable to outwardly deform a portion of said elastic element adjacent the shaped inner surface region of said female mold part where said localized projection of the product to be molded is reproduced in the negative, said pusher having a working end generally corresponding in shape to said projection and being effective to augment the tension produced in said textile reinforcement by the pressurized fluid-induced deformation of said elastic element at said shaped inner surface region, said pusher being slidably mounted in guides provided in said male mold part and being operatively linked to a movable control rod extending out of said male mold part.
Apparatus for molding reinforced resin products, comprising:
- a female mold part having a shaped inner surface complementary to the outline of a product to be molded, which outline includes at least one localized projection reproduced in the negative by said shaped surface of said female mold part, said female mold part having adjacent to and coextensive with its shaped inner surface a textile reinforcement for the product to be molded;
- and a male mold part movable in and out of said female mold part with substantial clearance and having a shaped outer surface dissimilar to said product outline, said male mold part being encompassed by an attached elastic element which, in use, is outwardly deformable by a pressurized fluid introduced between it and said male mold part in order to force liquid resin occupying said substantial clearance into said textile reinforcement and produce tension in said textile reinforcement by pressing against it, said male mold part including a slidable pusher operable to outwardly deform a portion of said elastic element adjacent the shaped inner surface region of said female mold part where said localized projection of the product to be molded is reproduced in the negative, said pusher having a working end generally corresponding in shape to said projection and being effective to augment the tension produced in said textile reinforcement by the pressurized fluid-induced deformation of said elastic element at said shaped inner surface region, said pusher being slidably mounted in air tight relation in a pressure chamber provided in said male mold part, said male mold part including a conduit for connecting said pressure chamber to a source of pressurized fluid which is the same pressure source as that which introduces pressurized fluid between said elastic element and said male mold part, there being means provided for delaying the establishment of fluid pressure between said elastic element and said male mold part until just after said pusher is operated.
Dependencies are inferred from the claim text.