Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Flash or sprue removal type
Reexamination Certificate
2005-03-25
2008-10-21
Heitbrink, Jill L (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Flash or sprue removal type
C264S328160, C425S547000
Reexamination Certificate
active
07438842
ABSTRACT:
The change-over device changes over, to one of three passages, between the runner groove connected to the injection nozzle and the communicating groove communicated with the mold side passage. At the first position, the second passage372is communicated with the communicating groove and the temperature of a flow of hot air is measured by the thermocouple and the flow is discharged into the atmosphere. At the second position, the runner groove and the communicating groove are communicated with each other when the runner groove and the communicating groove are open to the second passage371and resin material is injected into the mold. At the third position, the material in the injection passage and the material in the runner groove are deposited to each other when the injection passage is shut off from the communicating passage and the third passage374is communicated with the runner groove.
REFERENCES:
patent: 7300274 (2007-11-01), Nasu et al.
patent: 2003/0111765 (2003-06-01), Ichikawa et al.
patent: 2005/0212176 (2005-09-01), Nasu et al.
patent: 2003-245980 (2003-09-01), None
Ichikawa Masato
Kuroyanagi Akira
Nasu Hidehisa
Sahashi Akira
Denso Corporation
Harness Dickey & Pierce PLC
Heitbrink Jill L
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