Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1984-04-27
1985-06-11
Flint, Jr., J. Howard
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
264537, 425533, 425577, B29F 106
Patent
active
045227780
ABSTRACT:
A method and apparatus for the production of parts made from plastics material using an injection press in which the mould cavity is defined by a mould surface Sca and the surface Sve of a movable piston. Firstly, the material is introduced into the mould cavity and during injection, the piston is kept stationary for a time to form a rough mould and then retracted to form a parison. Secondly, after injection has been completed the piston is advanced again, and maintained in position while cooling takes place. Thirdly, the mould is opened and the part ejected.
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Baciu Antoine
Rius Jean M.
Sivry Bernard
Cibie Projecteurs
Flint, Jr. J. Howard
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