EQUIPMENT AND METHOD FOR MULTI-CAVITY MOLDING

Japanese Patent JP3640246

B2

PROBLEM TO BE SOLVED: To solve the problem that a molding defect such as a short shot occurs in some products when a resin is injected into a plurality of product molding parts by one injector and that it is troublesome to take a measure to counter the defect.
SOLUTION: Equipment 10 for plural-cavity molding is constituted of a top force 20, a bottom tool 11, the product forming parts 12 in a plurality, tubular pots 13 formed downward from these product forming parts 12, plungers 14 fitted respectively to these pots 13, plunger elevating means 15 for elevating the plungers 14 from positions of completion of storage of a molding material to positions of molding, tool elevating means 16 for moving the bottom tool 11 from a position of opening to a position of closure and a material supply means 30 for supplying a proper quantity of molding material to each pot 13 when a mold is opened. Since the molding material is supplied in a fixed quantity to the pots in a plurality by the material supply means and injected with pressure into the product molding parts by the plungers, the quantity of supply of the material is uniform and the material can be injected into the product molding parts under a sufficient pressure.

Toru Ikeda

JP2001300127A

April 20, 2005

September 28, 2001

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Nissei Plastic Industry Co., Ltd.

B29C45/26; B29C45/02; B29C45/17; B29C45/70; H01L21/56; (IPC1-7): B29C45/26; B29C45/02; H01L21/56

JP9082736A
JP11176854A
JP5185458A
JP59172241A
JP4028514A
JP200188170A
JP11195659A
JP5346361A
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Yoichiro Shimoda

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