Method for forming molded portion at end of extruded weather str

Details Method for forming molded portion at end of extruded weather str Method for forming molded portion at end of extruded weather str

1991-10-18

1993-10-05

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264252, 264276, 2643287, 2643289, B29C 6722

Patent

active

052502414

ABSTRACT:
A method and a device for forming a molded portion at an end of an extruded weather strip. The method includes the steps of placing the end of the extruded weather strip made of foamed elastic material in a cavity defined by a movable upper mold member and a fixed lower mold member which composes a mold, closing the mold with the end of the extruded weather strip clamped by a predetermined clamping force, injecting a foamable molding material into the cavity, moving the upper mold member up by an force not more than the clamping amount in the process of foaming of the foamable molding material to reduce clamping of the upper mold member and to enlarge the cavity, continuing molding with the upper mold member moved up until the foamable molding material fills the enlarged cavity, and opening the mold when molding of the molded portion is completed. The device has a fixed lower mold member, a movable upper mold member, a servomotor, and power transmission means for connecting the servomotor to the upper mold member and converting a rotary movement of the servomotor to a vertical movement of the upper mold member, whereby the upper mold member is moved up and down by a predetermined amount and in a predetermined timing.

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