公开(公告)号：US4487728A

公开(公告)日：1984-12-11

申请号：US509057

申请日：1983-06-29

申请人： Karl Hagen ,  Karl H. Scholl

发明人： Karl Hagen ,  Karl H. Scholl

IPC分类号： B29C33/00 ,  B29B11/06 ,  B29C43/00 ,  B29C43/02 ,  B29C43/12 ,  B29C43/32 ,  B29C43/36 ,  B29C43/52 ,  B29C43/56 ,  B29C43/58 ,  B29C51/02 ,  B29C51/28 ,  B29C55/18 ,  B29F5/00

CPC分类号： B29C51/02 ,  B29B11/06 ,  B29C43/56 ,  B29C51/28 ,  B29C2791/008 ,  B29C43/12 ,  B29K2105/251 ,  B29K2995/0053

摘要： Moldings, for example hollow articles, are produced by sintering a thermoplastic powder or granular material and then reshaping the resulting blank by thermoforming. Sintering is carried out in a mold cavity under pressure, by exposure to high-frequency vibrations, which heats the plastic to a temperature intermediate between its softening point and its melting point. In this way, grain boundary adhesion between the individual plastic particles constituting the blank results, and the directly subsequent thermoforming can be carried out without additional supply of heat.

摘要翻译： 模制品，例如中空制品，是通过烧结热塑性粉末或颗粒材料制成的，然后通过热成型重塑所得到的坯料。 通过暴露于高频振动，在压力下在模具腔中进行烧结，高频振动将塑料加热到其软化点和熔点之间的温度。 以这种方式，可以在不增加热量的情况下进行构成坯料的各个塑料颗粒之间的晶界粘合和直接随后的热成型。

公开(公告)号：US4366369A

公开(公告)日：1982-12-28

申请号：US236498

申请日：1981-02-20

申请人： Karl Hagen ,  Karl H. Scholl ,  Gerhard Schmelzer

发明人： Karl Hagen ,  Karl H. Scholl ,  Gerhard Schmelzer

IPC分类号： B29C35/00 ,  B29B9/00 ,  B29B13/00 ,  B29B13/08 ,  B29C35/02 ,  B29C35/08 ,  B29C45/00 ,  B29C51/42 ,  G05D23/22 ,  F27B9/06

CPC分类号： B29C35/0288 ,  B29C35/08 ,  G05D23/1917 ,  G05D23/22 ,  B29C2037/903

摘要： In an apparatus for heating preshapes consisting of a thermoplastic, in particular a fiber-reinforced plastic, the preshape is fed, by a conveyor belt, to a heating apparatus equipped with bright infra-red radiators. To provide time-dependent metering of the thermal energy, the installation possesses an electronic control unit, equipped with a microprocessor, which unit generates a periodically increasing and decreasing electrical signal voltage, whose time-curve and amplitude can be varied in accordance with the heat uptake capacity of the preshape. The signal voltage additionally controls a feed unit, which in turn feeds to the heating apparatus, by means of a phase control system, a periodic electric current which in its time-curve and amplitude corresponds to the pre-programmed signal voltage.

摘要翻译： 在用于加热由热塑性塑料，特别是纤维增强塑料组成的预制件的装置中，预浸塑料通过传送带送入装备有明亮的红外辐射器的加热装置。 为了提供与时间相关的热能测量，该装置具有装备有微处理器的电子控制单元，该单元产生周期性增加和减小的电信号电压，其时间曲线和振幅可根据热量而变化 前置摄影能力。 信号电压另外控制馈送单元，该馈送单元又通过相位控制系统馈送到加热装置，周期性电流在其时间曲线和振幅对应于预编程的信号电压。