Injection molding machine for making a magnetic tape cassette

Details Injection molding machine for making a magnetic tape cassette Injection molding machine for making a magnetic tape cassette

1993-06-14

1995-01-31

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

2643287, 2643288, 425556, 425572, 425573, 425575, 425577, B29C 4516

Patent

active

053854616

ABSTRACT:
The present invention provides an injection molding die unit having a simple construction and an injection molding method employing the injection molding die unit and capable of molding a composite molding in a short cycle time. After molding a first molding (70), a male die (30) is moved together with the first molding (70) by a distance (Gb) in direction (L) and, at the same time, a movable female die (14B) of a composite female die (14) is moved by the same distance (Gb) in the same direction (L) by a coil spring (29) to form a space (72) between the male die 30 and the composite female die (14) consisting of the movable female die (14B) and a fixed female die (14A), and a second molding material is injected into the space (72) to form a second molding (80).

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"Hydraulic Injection Molding Machinery" Cincinatti Milacron Pamphlet, Feb. 1984.

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