IMPROVEMENTS IN OR RELATING TO INJECTION MOULDING

1,253,539. Injection moulding. WELLMAN ENG. CORP. Ltd. 3 Dec., 1969 [5 Sept., 1968], No. 42356/68. Heading B5A. An injection mould cavity 13 is evacuated through one or more passages 17, the or each passage containing an ejector pin 19 which is operable by means of a rod 25. The pin 19 may carry a v...

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Bibliographische Detailangaben
1. Verfasser:	JOHN ANDREW NAISMITH
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Zusammenfassung:	1,253,539. Injection moulding. WELLMAN ENG. CORP. Ltd. 3 Dec., 1969 [5 Sept., 1968], No. 42356/68. Heading B5A. An injection mould cavity 13 is evacuated through one or more passages 17, the or each passage containing an ejector pin 19 which is operable by means of a rod 25. The pin 19 may carry a valve head 22 which is normally held clear of its seating 21 by means of a spring 30 adjustable by a screw 31. Suction is applied through a duct 32 in a gas-tight chamber 14 and air may be blown in through the duct 32 and passage 17 to assist ejection of the moulded article.