MOLD FOR COMPRESSION MOLDING, COMPRESSION MOLDING APPARATUS AND COMPRESSION MOLDING METHOD
PROBLEM TO BE SOLVED: To prevent defects caused by wrinkles occurring in a film by removing the wrinkles in a compression molding using the film.SOLUTION: A lower mold 2 opposed to an upper mold 1 has a frame-like frame mold 4 and a compression mold 5 fitted to the mold 4 and movable in a direction...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | PROBLEM TO BE SOLVED: To prevent defects caused by wrinkles occurring in a film by removing the wrinkles in a compression molding using the film.SOLUTION: A lower mold 2 opposed to an upper mold 1 has a frame-like frame mold 4 and a compression mold 5 fitted to the mold 4 and movable in a direction coming close to and separating from the upper mold 1. A projection 5a is formed on an outer peripheral edge of a surface opposed to the upper mold 1, of the compression mold 5. A step part 4a is formed at a side close to the upper mold 1, of the inner peripheral surface of the mold 4. A resin 9 is supplied to the lower mold 2 covered with a release film 8. The wrinkle 8a occurs by moving the compression mold 5 in a direction coming close to the upper mold 1 thereby loosening the release film 8, and the wrinkle 8a is removed by moving the compression mold 5 in a direction more close to the upper mold 1 with the result that the projection 5a of the compression mold 5 projects more than the step part 4a of the mold 4 thereby spreading the release film 8. |
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