【発明の名称】中空スペースを有する合成樹脂製の物品を射出成形する装置及びその装置を操作する方法

Japanese Patent JP2662463

B2

PCT No. PCT/EP93/02608 Sec. 371 Date May 5, 1995 Sec. 102(e) Date May 5, 1995 PCT Filed Sep. 25, 1993 PCT Pub. No. WO94/07675 PCT Pub. Date Apr. 14, 1994The proposal is for a device for injection molding plastic items enclosing hollow spaces with which a further pressurised medium like air, gas or a fluid can be introduced through a hollow needle (5) at a point differing from the nozzle into a mould (1), the mould hollow or cavity (4) of which can be filled with molten pastic through a nozzle. There is a needle core (9) which can be moved axially to a limited extent in the hollow needle (5) and it is possible via this needle core (9) to vary the cross-section of or open and close the aperture (16) of the hollow needle (6) opening into the mould hollow or cavity (4). The needle core (9) bears a thickened head or plate (10) in front of the end of the aperture in the hollow needle, the outside diameter of which corresponds at least approximately to the outside diameter of the hollow needle, so that it forms, with the aperture end (6) of the hollow needle (5), a radially directed splitting valve. In relation to the hollow needle (5), the needle core (9) is axially supported by spring means (23). It is important here that these spring means (23) continuously engage with the needle core (9) in the closing direction of the aperture of the splitting valve (16) and that the needle core (9) can be moved against the spring means (23) in the opening direction by a remote-controlled driving device (17, 18).

ETSUKARUTO HERUMUUTO
EERITSUTO YURUGEN
SHUREEDAA KURAUSU
HYUUBERU UUE

JP50867893A

October 15, 1997

September 25, 1993

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BATSUTENFUERUTO GMBH

B29C45/17; B29C45/26; B29C45/34; B29C45/00; B29L22/00; (IPC1-7): B29C45/00; B29C45/26; B29C45/34

JP441212A

Mitsufumi Esaki (2 others)

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