초록 ▼

A mold assembly and method for holding a panel or sheet of material such as glass while molding a member around an attachment member and a gasket around a peripheral portion of the panel from a thermoplastic or other moldable material such as PVC. The assembly and method provides a movable, secondar

A mold assembly and method for holding a panel or sheet of material such as glass while molding a member around an attachment member and a gasket around a peripheral portion of the panel from a thermoplastic or other moldable material such as PVC. The assembly and method provides a movable, secondary pressure pad which reduces the percentage of broken panels of material. The mold assembly includes a first mold section and a second mold section, which define a mold cavity therebetween. The first mold section includes a first sheet holding surface adjacent the mold cavity, and the second mold section includes a movable, primary pressure pad having a second sheet holding surface adjacent the mold cavity. The primary pressure pad is urged toward the sheet by resilient members to hold the sheet between the first and second holding surfaces in a manner so that the peripheral portion of the sheet extends into the cavity for molding a gasket thereon. The secondary pressure pad is supported by one of the second mold section and the movable, primary pressure pad and includes an attachment member holder, preferably a recess, which holds and positions the attachment member remote from the peripheral portion of the sheet during molding. The secondary pressure pad includes a second mold cavity which extends around the attachment so that the moldable material injected into the mold apparatus will form a molded member around the attachment member to thereby adhere the attachment member to the sheet.

대표청구항 ▼

[ We claim:] [1.] A mold assembly for molding at least one attachment member on a sheet of material on an area of the sheet remote from the peripheral portion of the sheet, said mold assembly comprising:first and second mold sections having first and second facing surfaces respectively, said facing

[ We claim:] [1.] A mold assembly for molding at least one attachment member on a sheet of material on an area of the sheet remote from the peripheral portion of the sheet, said mold assembly comprising:first and second mold sections having first and second facing surfaces respectively, said facing surface of said first mold section including a first sheet holding surface;a movable, primary pressure pad being resiliently supported by said second mold section and including a second sheet holding surface thereon;a first mold cavity defined by at least one of said first mold section, said second mold section, and said primary pressure pad;at least one resilient member urging said primary pressure pad toward said first mold section for holding the sheet therebetween;a secondary pressure pad extending within at least a portion of said movable, primary pressure pad, said secondary pressure pad being supported by one of said primary pressure pad and said second mold section, said secondary pressure pad defining a second mold cavity and being adapted to hold the attachment member remote from the peripheral portion of the sheet, said secondary pressure pad including a third facing surface, and at least a portion of said third facing surface being spaced from the sheet to define said second mold cavity therebetween when a sheet is supported in said mold assembly; andat least one of said first and second mold sections including a moldable material delivery system for directing moldable material to said first and second mold cavities.