Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Mold motion or position control
Patent
1983-07-13
1986-12-30
Derrington, James
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Mold motion or position control
264310, 425183, 425429, 425430, 425434, 425435, B29C 504
Patent
active
046326545
ABSTRACT:
Rotational molding apparatus and methods for rotationally molding castable material such as polymers and other materials. In one form, a shuttle or wheeled carriage containing a mold fixture for holding one or more molds, which fixture is both pivotable and rotatable on the carriage, is operable to move along a fixed path into and out of an oven and a cooling chamber. Two of such mold fixture containing carriages may be automatically moved between the oven and one or more cooling chambers, alternately to permit the oven and cooling chamber or chambers to be operated substantially all of the time during an operating shift. An automatic programming device or computer operates to control the movement of the carriage or carriages into and out of the oven and cooling chamber, the operations of the fixture rotating and pivoting motors and, if utilized, the operation of automatic mold charging equipment, the cooling chamber water pumps, the oven heating elements, mold opening and closing means, molded article removal equipment, etc. In a particular form, mold containing carriages alternately move into the oven and cooling chamber along a single track wherein one carriage is either sidetracked or moved to the side of the single track while the other carriage travels between the oven and cooling chamber.
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