INJECTION MOLDING MACHINE, INJECTION MOLDING SYSTEM, PELLET SUPPLY UNIT, INJECTION MOLDING METHOD AND INJECTION MOLDED PRODUCT

Title:

INJECTION MOLDING MACHINE, INJECTION MOLDING SYSTEM, PELLET SUPPLY UNIT, INJECTION MOLDING METHOD AND INJECTION MOLDED PRODUCT

Document Type and Number:

WIPO Patent Application WO/1999/033630

Kind Code:

A1

Abstract:

In an injection molding machine which has conventionally been used, the water and a gas in undried resin pellets are completely removed by a drier set to a predetermined temperature, and the resultant water- and gas-removed dried pellets are introduced into the injection molding machine, so that thorough attention should be paid to the quality control of the water and gas in the pellets before the pellets are introduced into the injection molding machine. A molding machine, wherein undried resin pellets are injection molded by evaluating the injected resin, controlling the operating conditions including a pellet supply rate and a degree of decompression, and thereby specifying optimum operating conditions under which good products are obtained and an optimum amount of accumulation, an amount of accumulation of pellets supplied to an injection molding chamber being detected, the supplying of the pellets to the injection molding chamber being controlled on the basis of the detected information, the water and gas evaporated from the pellets during a melting process in the injection molding chamber being discharged under vacuum to the atmosphere.

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Inventors:

ASANO TSUYOSHI (JP)

Application Number:

PCT/JP1998/005962

Publication Date:

July 08, 1999

Filing Date:

December 25, 1998

Export Citation:

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Assignee:

HARUNA CO LTD (JP)
ASANO TSUYOSHI (JP)

International Classes:

B29C45/18; B29C45/76; B29C45/63; (IPC1-7): B29C45/18; B29C45/76

Foreign References:

JPH0564826A	1993-03-19
JPH09131777A	1997-05-20
JPH02310020A	1990-12-25

Other References: