Device for the injection molding of plastic objects enclosing hollow
spaces and process for operating it
    1.
    发明授权
    Device for the injection molding of plastic objects enclosing hollow spaces and process for operating it 失效
    用于注塑塑料物体的设备,包括中空空间和操作过程

    公开(公告)号:US5750155A

    公开(公告)日:1998-05-12

    申请号:US406945

    申请日:1995-05-05

    CPC分类号: B29C45/1734

    摘要: The 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).

    摘要翻译: PCT No.PCT / EP93 / 02608 371日期:1995年5月5日 102(e)日期1995年5月5日PCT 1993年9月25日PCT公布。 出版物WO94 / 07675 日期1994年04月14日提出的是用于注塑塑料制品的装置,该塑料制品包围中空空间,通过空心针(5)可以在不同于喷嘴的点处将诸如空气,气体或流体的另外的加压介质引入到中空针 模具(1),其中空模或空腔(4)可以通过喷嘴填充熔融的塑料。 有一个可以在空心针(5)中轴向移动到有限程度的针芯(9),并且可以经由该针芯(9)来改变开口的横截面或打开和关闭孔 )打开到模具中空或空腔(4)中的中空针(6)。 针芯(9)在中空针的孔的端部的前方具有增厚的头部或板(10),其外径至少近似于中空针的外径,从而形成 与中空针(5)的孔径端(6)一起形成径向分流阀。 相对于中空针(5),针芯(9)由弹簧装置(23)轴向支撑。 重要的是,这些弹簧装置(23)在分离阀(16)的孔的关闭方向上与针芯(9)连续地接合,并且针芯(9)可以抵靠弹簧装置( 23)通过遥控驱动装置(17,18)在打开方向上移动。