Injection mold safety controls

Details Injection mold safety controls Injection mold safety controls

1984-05-08

1986-04-08

Hoag, Willard E.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Feed control of material en route to shaping area

164153, 192129B, 425151, 425166, 425167, 425171, B29C 3922, B29C 3944

Patent

active

045809658

ABSTRACT:
A contact sensing system senses the contact of two parts, such as the closure of two die parts in a molding machine, and controls a subsequent event such as the introduction of fluent molding material into the mold when closure of the die parts is sensed. One of the die parts is provided with an orifice which is covered by the other die part when the mold is closed. Sensing is achieved by delivering air through the orifice using an air line and sensing the pressure increase in the line when the orifice is closed by the other die part. A control module houses the components of the sensing system and protects the components in hostile environments.

REFERENCES:
patent: 3632251 (1972-01-01), Henry
patent: 3677680 (1972-07-01), Etherington
patent: 3991639 (1976-11-01), Pfeifer
patent: 3998574 (1976-12-01), Blake
patent: 4040776 (1977-08-01), Kelz
patent: 4106607 (1978-08-01), Badavas
patent: 4131189 (1978-12-01), Stephens
patent: 4131596 (1978-12-01), Allen
patent: 4261450 (1981-04-01), Matsushima et al.

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