Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Patent
1987-05-21
1989-12-26
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
264 405, 425149, 425170, B29C 4577
Patent
active
048896675
ABSTRACT:
A method for the supervision of injection molding including monitoring an internal die pressure of molten resin flowing through a resin passageway in a mold to form a monitored waveform; displaying the monitored wavefrom together with a predetermined reference waveform on a display unit such as a CRT, and comparing the monitored waveform with an allowable value of the reference waveform to determine any abnormality caused in a molding process. The injection molding can be supervised with accuracy on the basis of the reference waveform representing the optimum internal die pressure, thereby increasing the quality of molded articles.
REFERENCES:
patent: 3840312 (1974-10-01), Paulson et al.
patent: 4060362 (1977-11-01), Wilson, III
patent: 4359435 (1982-11-01), Kogure
Siemens Energietechnik 4, Sep./Oct. 1982, pp. 226-229.
Siemens Components 19, Mar. 1981, pp. 46-49.
Kojima Hisashi
Miyagi Tatsuo
Heitbrink Jill L.
Silbaugh Jan H.
Technoplas Inc.
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