VISCOCITY CONTROL FOR MOLTEN PLASTICS PRIOR TO MOLDING
    83.
    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。

    Electrically-operated injection molding machine and injection molding method using the relevant machine
    87.
    发明公开

    公开(公告)号:EP0890426A2

    公开(公告)日:1999-01-13

    申请号:EP98305280.4

    申请日:1998-07-02

    摘要: An apparatus has servo motors(11), (12), (31), (40), (45), and (51) used for driving sources in processes of weighing blended resin(3b), of injecting weighed resin(3a) into a die cavity(2), of opening and closing dies, of gate cutting after filling weighed resin(3a) into the die cavity(2), of ejecting the molding(26) after forming, and of removing the molding(26).
    According to this configuration, because all the motions of injection operation are controlled by servo motors (11), (12), (31), (40), (45), and (51), the timing, injection speed, pressurizing speed, pressurizing pressure, and all others can be freely controlled, and not only the transferability of fine protrusions and recessions formed on the inner surface (5) of the die cavity (2) can be remarkably improved, but also the cycles can be increased because complex motions can be carried out by servo motors (11), (12), (31), (40), (45), and (51).
    In particular, because servo motors (45), (51) are used for driving sources of ejection of molding(26) after forming and removal of molding (26), there is no variation in repetitive response accuracy in motion, product removal timing by the product removing equipment(S) can be reduced to 0.01 second or less, and ultimately higher cycle is able to be achieved.

    摘要翻译: 一种设备,具有用于在称重注入称量树脂的共混树脂(3b)中,过程驱动源的伺服电机(11),(12),(31),(40),(45)和(51)(3a)的 入(2),的开口和填充称重树脂(3a)的进入模腔之后,关闭此,浇口切割的空腔形成,并去除模制的后喷射模塑(26)(2)(26) , 。根据这样的结构,因为喷射手术的所有运动由伺服电机(11)(12)(31)(40)(45)和(51)的正时,喷射速度,加压速度来控制 ,加压压力,和所有其他可以自由地控制,并且不仅微细突起的可转移性是和衰退形成的内表面(5)的模腔(2)的可以显着提高,所以,但周期可以增加,因为 复杂运动可以通过伺服电动机(11),(12),(31),(40),(45)和(51)来进行。 特别是,由于伺服电机(45),(51)用于形成和除去成型(26)的后驱动成型(26)的喷出的来源,有在运动重复的响应精度,产品取出定时通过没有变化 产物中除去设备(S)可以减少到0点01秒或更少,和更高的最终周期能够被实现。