Plunger for a multi-plunger type resin mold device

Details Plunger for a multi-plunger type resin mold device Plunger for a multi-plunger type resin mold device

1986-02-27

1987-11-24

Hoag, Willard E.

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

Female mold type means

425127, 425129R, 425544, B29C 4502, B29C 4553

Patent

active

047086130

ABSTRACT:
A plunger is used for a multi-plunger type resin mold device which is adapted to be slidably inserted into a pot to permit a resin in the pot into a mold. The plunger includes a forward end member whose forward end edge portion is formed of silicon nitride, silicon carbide or zirconia, the forward end edge portion of said forward end pot member being in contact with the resin in the pot, and a plunger body to which the forward end member is fixed. The forward end member is fixed to the plunger body by threadably inserting an insertion section of the forward end member into a recess formed in the plunger body.

REFERENCES:
patent: 1326692 (1919-12-01), Ragatchoff
patent: 1380397 (1921-06-01), Levedahl
patent: 1504538 (1924-08-01), Barthel
patent: 1534225 (1925-04-01), Lemieux
patent: 2220822 (1940-11-01), Grad
patent: 3163093 (1964-12-01), Gut
patent: 3911891 (1975-10-01), Dowell
patent: 4024802 (1977-05-01), Koppa
patent: 4288326 (1981-09-01), Keefer

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