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MOULD MATERIALS THEIR REQUIREMENTS AND GENERAL
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actuating pin additional adjustment alignment arise bore bottom force cause clearance closed position compression moulds considerable core members core pin core slide correct damage diameter distortion dowel effective ejection ejector pins ejector rod employed end face ensure entail faults finished moulding flash guide hole hardened heat treatment illustrated injection moulds insert inspection latter length located lock-nut locking lubricant machine main block maintenance engineer maintenance toolmaker means method misalignment mould cavity mould components mould construction mould design mould engineer mould maintenance mould mechanism mould members moulded article movable block movement nozzle operation parting-line surface plastic material plastic mould plug possible practice pressure production reamer recess record charts removed repair result secured shank shown side sleeve slight slot snags sprue bush sprue channel stationary block steel strips tapered threaded portion tion tool tool-room top force top plate troubles type of mould wear whilst