Chicago Rawhide Manufacturing Co.

Chicago Rawhide Mfg. Co.

Norman C Haas

Keith W Christiansen

A multipart mold assembly for removably receiving a casing unit and positioning the casing so as to form, in combination with at least one of the mold parts, a cavity having the shape of an element to be formed in the mold and bonded to the casing. One mold part has a surface defining part of the shape of said cavity, and a casing skirt support surface forms another part of the cavity. A flash barrier is formed along a part of the skirt casing when a clamping ring formed from a plurality of individual clamping ring elements engages the surface of said casing skirt and urges it into fluid-tight relation with the casing support surface.

Seal mold and method

A mold assembly for injection molding of precision composite articles, which is particularly adapted for use in making highly precise oil seals having a rubber body bonded to a metal mounting flange. The assembly comprises a bottom mold member adapted to be supported in fixed relation to a vertically reciprocable top mold member, the bottom member has means forming an upwardly opening annular recess for supporting therein a circular oil seal stamping of generally L-shaped cross section with an inner marginal portion extending in a radial direction into a mold cavity formed by spaced confronting surface portions of top and bottom mold members when in the closed position, and the top mold member having a downwardly opening annular recess in which a spring pressed stripper plate is retained for limited vertical movement by means of coiled spring member insertable in a groove in an edge of the stripper plate when the stripper plate is positioned in the recess in the top mold member enabling the mold assembly to be used for molding of oil seal units having stampings of different radial and axial dimensions.

Growing community of inventors

Wheaton, IL, United States of America

Norman C Haas