摘要:
Ejecting means, in a slot die head to extrude plastic material in a strip, whereby material left in the slot die head after extrusion has ceased can be removed, comprising a piston mounted with its crown flush with the inner wall of a distributing passage in the slot die head, so that, after the slot die head has been opened by separately upper and lower parts thereof, the piston can be moved hydraulically to project into the distributing passage to lift the residual material away from the wall of the distributing passage containing the piston to facilitate grasping of the material by an operator and stripping from the slot die head.
摘要:
A ring to be interposed between the adjoining ends of two lengths of cylinder barrel of a worm extruder, each length of which comprises an inner cylindrical member and an outer cylindrical member disposed concentrically therewith with a duct for flow of heating and/or cooling fluid provided between the cylindrical members, the ring having an inside diameter corresponding to the inside diameter of the inner cylindrical member end faces, having sealing rings therein, to abut and seal against the end faces of the cylindrical members and a covered in recess in its periphery for connection to a source of heating and/or cooling members, clamping means being provided to pull the outer cylindrical members into abutment with the ring.