Methods for molding composite polyester articles having rigid and
flexible regions
    1.
    发明授权
    Methods for molding composite polyester articles having rigid and flexible regions 失效
    用于模制具有刚性和柔性区域的复合聚酯制品的方法

    公开(公告)号:US5354532A

    公开(公告)日:1994-10-11

    申请号:US756850

    申请日:1991-09-10

    摘要: Composite molded articles having relatively rigid and flexible resin regions are bonded to one another along an interfacial fusion zone. A normally solid thermoplastic polyalkylene terephthalate resin preform (which will constitute the relatively rigid region of the composite article) is placed in a mold cavity. The flexible region of the composite article is then formed by introducing a molten thermoplastic polyester elastomer resin into the mold cavity at a temperature which is greater than the melt temperature of the solid preform. The introduced thermoplastic polyester elastomer resin contacts and at least partially plasticizes a surface region of the solid preform along the interfacial bonding zone within the mold cavity to thereby cause the polyester elastomer resin to coalesce with the at least partially plasticized surface region of the polyester resin. Upon cooling and solidification, the solid preform and the polyester elastomer are fused to one another along the interfacial bonding zone.

    摘要翻译: 具有相对刚性和柔性树脂区域的复合模塑制品沿着界面融合区彼此结合。 通常固体的热塑性聚对苯二甲酸亚烷基酯树脂预成型件(其将构成复合制品的相对刚性区域)放置在模具腔中。 然后通过将熔融的热塑性聚酯弹性体树脂以比固体预成型件的熔融温度大的温度引入模腔来形成复合制品的柔性区域。 引入的热塑性聚酯弹性体树脂与模具腔内的界面粘合区域接触并至少部分地增塑固体预型体的表面区域,从而使聚酯弹性体树脂与聚酯树脂的至少部分增塑的表面区域聚结。 在冷却和固化时,固体预成型件和聚酯弹性体沿着界面粘合区彼此熔合。

    Angular deviation signal generator
    2.
    发明授权
    Angular deviation signal generator 失效
    角偏差信号发生器

    公开(公告)号:US3987434A

    公开(公告)日:1976-10-19

    申请号:US580736

    申请日:1975-05-27

    IPC分类号: G06G7/22 H03M1/00 H03K13/02

    CPC分类号: H03M1/665 G06G7/22

    摘要: Analog signals, +sin .theta.a, -sin.theta.a, +cos.theta.a and -cos.theta.a where .theta. is a measured angle, are composed into a sine and a cosine signal phase shifted by 2.pi.k/n where k is one of 0, 1, 2, . . . n as determined by values from the most significant digit to a .pi./n bit digit of a binary command angle lying in one of 2n equal intervals into which a range of 0 to 2.pi. is divided. The phase shifted cosine signal is attenuated as a linear function approximating a tangent of the true value of data expressed by all the remaining digits of the command angle or of its complement as determined by the .pi./n bit digit. The attenuated cosine signal is added to the phase shifted sine signal for the true value of the data and subtracted from the latter for its complement providing an analog deviation between both angles.

    摘要翻译: 模拟信号+sinθa,-θθa,+cosθa和-θosθ,其中θ是测量角度,被组合成正弦和余弦信号相位移位2 pi k / n,其中k是1 为0,1,2,... 的。 的。 n由从0到2π的范围被划分成2n个相等间隔之一的二进制指令角的最高有效位到1 / n位数字的值确定。 相移余弦信号被衰减为线性函数,其近似由由pi / n位数字确定的命令角或其补码的所有剩余数字表示的数据的真值的切线。 衰减的余弦信号被加到相移正弦信号上,用于数据的真实值,并从后者中减去其补码,从而提供两个角度之间的模拟偏差。