METHOD AND APPARATUS FOR CONTROLLING GAS ASSISTED INJECTION MOLDING
    2.
    发明公开
    METHOD AND APPARATUS FOR CONTROLLING GAS ASSISTED INJECTION MOLDING 失效
    方法和装置控制气体辅助注射成型

    公开(公告)号:EP0853539A1

    公开(公告)日:1998-07-22

    申请号:EP96930671.0

    申请日:1996-09-03

    申请人: Ibar, Jean-Pierre

    发明人: Ibar, Jean-Pierre

    IPC分类号: B29C45

    CPC分类号: B29C45/568 B29C45/1704

    摘要: An apparatus and method include a mold which defines a mold cavity (200) with an inlet through which a molten, moldable material can pass into and/or through the mold cavity. A feeder for preparing the molten, moldable material, is spaced from the mold and expels the material to the mold cavity or to an accumulator connected to the mold cavity. A mechanism for controlling the temperature of the material in the feeder, accumulator, and the mold, as well as least one gas injection unit (1000, 2000) with controls for the gas before, during and after its injection into the mold cavity and/or into gas channels located within and/or around the mold cavity are provided. A closed loop regulating system easily adjusts and regulates the gas flow and monitors the average gas pressure of the injected gas according to a programmed conditioning signal. The gas injection unit has relief valves (10, 20) and gas tanks. Also included in the gas injection unit is gas purging/venting equipment equipment (2020) capable of producing a vacuum in the mold cavity and/or in the gas channels and/or inducing a differential or pressure creating flow of pressurized gas. Pressure, temperature and vibration probes (33, 51, 52, 53) are located in the mold assembly and in the gas injection unit(s) and are connected to transducers controlled by a computer. A controlled amount of volatile chemicals can be mixed with the inert gas of the gas injection unit. The apparatus includes one or more vibration devices (333, 444) to induce controlled high or low frequency low or high amplitude vibrations in the gas flowing. A mechanism controls the timing of activation of vibration during the filling, packing and cooling stages of the molding operation.

    METHOD AND APPARATUS FOR CONTROLLING GAS ASSISTED INJECTION MOLDING
    6.
    发明授权
    METHOD AND APPARATUS FOR CONTROLLING GAS ASSISTED INJECTION MOLDING 失效
    方法和装置控制气体辅助注射成型

    公开(公告)号:EP0853539B1

    公开(公告)日:2003-11-19

    申请号:EP96930671.1

    申请日:1996-09-03

    申请人: Ibar, Jean-Pierre

    发明人: Ibar, Jean-Pierre

    IPC分类号: B29C45/02 B29C45/17 B29C45/56

    CPC分类号: B29C45/568 B29C45/1704

    摘要: An apparatus and method include a mold which defines a mold cavity (200) with an inlet through which a molten, moldable material can pass into and/or through the mold cavity. A feeder for preparing the molten, moldable material, is spaced from the mold and expels the material to the mold cavity or to an accumulator connected to the mold cavity. A mechanism for controlling the temperature of the material in the feeder, accumulator, and the mold, as well as least one gas injection unit (1000, 2000) with controls for the gas before, during and after its injection into the mold cavity and/or into gas channels located within and/or around the mold cavity are provided. A closed loop regulating system easily adjusts and regulates the gas flow and monitors the average gas pressure of the injected gas according to a programmed conditioning signal. The gas injection unit has relief valves (10, 20) and gas tanks. Also included in the gas injection unit is gas purging/venting equipment equipment (2020) capable of producing a vacuum in the mold cavity and/or in the gas channels and/or inducing a differential or pressure creating flow of pressurized gas. Pressure, temperature and vibration probes (33, 51, 52, 53) are located in the mold assembly and in the gas injection unit(s) and are connected to transducers controlled by a computer. A controlled amount of volatile chemicals can be mixed with the inert gas of the gas injection unit. The apparatus includes one or more vibration devices (333, 444) to induce controlled high or low frequency low or high amplitude vibrations in the gas flowing. A mechanism controls the timing of activation of vibration during the filling, packing and cooling stages of the molding operation.

    VISCOCITY CONTROL FOR MOLTEN PLASTICS PRIOR TO MOLDING
    9.
    发明公开
    VISCOCITY CONTROL FOR MOLTEN PLASTICS PRIOR TO MOLDING 失效
    VISKOSITÄTSKONTROLLEFÜRGESCHMOLZENE KUNSTSTOFFE VOR DEN FORMEN

    公开(公告)号:EP0946342A4

    公开(公告)日:2002-11-06

    申请号:EP97951734

    申请日:1997-12-12

    申请人: IBAR JEAN-PIERRE

    发明人: IBAR JEAN-PIERRE

    摘要: Controlling viscosity of molten polymers, such as polycarbonate, prior to a molding operation such as injection molding, extrusion, thermoforming or blow molding, involves a reduction of viscosity in the plastic melt at constant temperature, by the action of a vigorous mechanical extensional shear vibration, with minimum or no external pressure, at a constant amplitude and frequency, causing the melt to become highly elastic and simultaneously fatigued for a certain time at that temperature, maintaining this high elastic state until the macromolecules have partially or totally disentangled, in a controllable manner, at which stage the melt is ready for a molding operation such as a simple quenching operation or an extrusion process followed by quenching to produce pellets or compounds with a better mix or a lower viscosity when remelted, or an injection molding operation where the melt viscosity has been greatly reduced allowing a better processability of the injected part.

    摘要翻译: 熔融聚合物如聚碳酸酯的粘度的控制方法是在诸如注射成型,挤出,热成型或吹塑成型之前进行的。 当需要显着降低粘度时,塑料熔体在恒定温度下以恒定的振幅和频率在最小或没有外部压力下进行剧烈的机械拉伸剪切振动的作用,导致熔体变高 并且同时在该温度下疲劳一段时间,保持这种高弹性状态,直到大分子以可控的方式部分或完全解开,在该阶段熔体准备好进行模制操作,例如 简单的淬火操作或挤出过程,然后淬火以产生在重熔时具有更好的混合或更低粘度的颗粒或化合物,或者注塑成型操作,其中熔体粘度已经大大降低,从而允许注射部件的更好的可加工性,例如 允许使用较低的注射温度,较低的注射压力或两者。

    METHOD AND APPARATUS FOR CONTROLLING GAS ASSISTED INJECTION MOLDING
    10.
    发明公开
    METHOD AND APPARATUS FOR CONTROLLING GAS ASSISTED INJECTION MOLDING 失效
    方法和装置控制气体辅助注射成型

    公开(公告)号:EP0853539A4

    公开(公告)日:2000-12-06

    申请号:EP96930671

    申请日:1996-09-03

    申请人: IBAR JEAN PIERRE

    发明人: IBAR JEAN-PIERRE

    CPC分类号: B29C45/568 B29C45/1704

    摘要: An apparatus and method include a mold which defines a mold cavity (200) with an inlet through which a molten, moldable material can pass into and/or through the mold cavity. A feeder for preparing the molten, moldable material, is spaced from the mold and expels the material to the mold cavity or to an accumulator connected to the mold cavity. A mechanism for controlling the temperature of the material in the feeder, accumulator, and the mold, as well as least one gas injection unit (1000, 2000) with controls for the gas before, during and after its injection into the mold cavity and/or into gas channels located within and/or around the mold cavity are provided. A closed loop regulating system easily adjusts and regulates the gas flow and monitors the average gas pressure of the injected gas according to a programmed conditioning signal. The gas injection unit has relief valves (10, 20) and gas tanks. Also included in the gas injection unit is gas purging/venting equipment equipment (2020) capable of producing a vacuum in the mold cavity and/or in the gas channels and/or inducing a differential or pressure creating flow of pressurized gas. Pressure, temperature and vibration probes (33, 51, 52, 53) are located in the mold assembly and in the gas injection unit(s) and are connected to transducers controlled by a computer. A controlled amount of volatile chemicals can be mixed with the inert gas of the gas injection unit. The apparatus includes one or more vibration devices (333, 444) to induce controlled high or low frequency low or high amplitude vibrations in the gas flowing. A mechanism controls the timing of activation of vibration during the filling, packing and cooling stages of the molding operation.