Patent ID: 6702560
Filing Date: 2004-03-09
Classification: B29C

Abstract:
A plastic tandem extrusion sizer mold comprising plating, a cavity, water holes, gas holes and gas slots, characterized in that an inlet plate, middle plates and an outlet plate are connected with each other in series by a columniform pin, and then side baffles are added to fix the plates on a base with the aid of bolts, a close cavity is formed in the center of the inlet plate, the middle plates and the outlet plate; there are no joints around the cavity, and the cavity has no parting sections; water holes and gas holes at the circumference of the cavity; a rubber sealing gasket, which connects water holes and separates gas slots, is disposed between the corresponding water holes of two plates; the cavity, gas slots, gas holes and gas nozzles communicate with each other, a water nozzle installed at the inlet plate communicates with the water hole, a gas nozzle installed on a selected middle plate;the inlet plate, several middle plates and the outlet plate of the same thickness are placed upright and arranged in series longitudinally; a concave stand is milled at one end face of the inlet plate and the middle plate; the gas holes are drilled at the four corners of the concave stand, the gas slots are formed by the combination of plates and a concave stand in turn, and the gas slots are connected with each other in series via the gas holes at the four corners, so that gas is taken out in subsection from the gas nozzles on the selected middle plate and the connected gas holes and each gas slot contributes to the parallel connection between sections.