Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – Female mold type means
Patent
1993-04-23
1995-05-16
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
Distinct means to feed, support or manipulate preform stock...
Female mold type means
156322, 264322, 264511, 4251261, 425127, 4251291, 425547, B29C 4514
Patent
active
054155363
ABSTRACT:
A method for forming a pattern onto an article during injection molding thereof. A pattern-bearing film is heated and softened by a heating board. The softened pattern-bearing film is transferred to the cavity surface of a female mold. Thereafter, the female mold and a male mold are closed. Then, a molten resin is injected into the cavity. When a pattern-bearing film is brought in contact with and heated by the heating board, marks or impressions of air blow holes on the surface of the heating board remain on the pattern-bearing film. To prevent the formation of these marks or impressions, a square-shaped holding frame is fixed on the surface of the heating board. The peripheral portion of the pattern-bearing film is held on the surface of the holding frame. Thus, while the pattern portion of the pattern-bearing film is spaced apart from the surface of the heating board, the film is heated. To keep the pattern-bearing film uniformly spaced from the surface of the heating board, air is supplied to the inside of the holding frame.
REFERENCES:
patent: 2811744 (1957-11-01), Baldanza
patent: 4545752 (1985-10-01), Hanamoto et al.
patent: 4639341 (1987-01-01), Hanamoto et al.
patent: 4994224 (1991-02-01), Itoh et al.
Dai Nippon Printing Co. Ltd.
Heitbrink Tim
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