GB166933A - Improvements relating to apparatus for moulding plastic material - Google Patents

Abstract

166,933. Sagar-Richards, Ltd., and Richards, D. March 24, 1920. Stream-cutting machines; extrusion machines; cutting-apparatus.- Comprises improvements in apparatus of the type in which a die is held between a movable die-plate and a fixed dieplate connected with a compressor. A divided die A is held between a die-plate B secured to a compressor d and a movable lie-plate C which slides on guides c and is operated by a lever c' and link c<2> forming a toggle. The ends of the die are recessed to receive spigots c<6> on the plates B, C, whereby the parts of the die are held together. Material is forced into the die from the compressor by means of a piston D carried by a screw d<1> passing through a. worm-wheel d<2> formed as a nut, the screw being operable directly by a handle d<3> or indirectly by a handle d<6> operating a worm d<4> engaging the worm-wheel d<2>. A core H carried by the plate C is supported at its free end ty a core H<2> carried by a member d<9> arranged in the nozzle d<8> of the compressor d. In operation the die A is pressed against the plate B by mov.ng the plate C, and material is forced into the die from the compressor. Knives carried by holders e<1> are then advanced through slots in the plate B by levers e<3> to sever the article, after which the plate C is withdrawn, the die A being held against the plate B during such withdrawal by a forked lever a<2> which is held by a cam locking-device a<3>. Branch passages may be formed in the article by cores arranged within the die A, or by means of a hollow cutter H<1>, Fig. 7.