DEVICE FOR FORMING PLASTIC COMPOSITE MATERIAL UNDER PRESSURE AND HEAT

摘要

PURPOSE:To permit a uniform and rapid heating avoiding the need for temperature control by making up the device structure of plate heaters, resistance heating bodies and electrode plates for energizing material. CONSTITUTION:An electrically conductive laminated prepreg material is held between plate heaters 2 and these plate heaters are interposed between heat insulating plates 4, which are pressed between a slide 5a and a head 5b of a pressboard 5. Each of the plate heaters 2 in such a pair contains therein a resistance heating body 10 enclosed with an insulating material and the plate heaters so formed as to cover the resistance heating body 10 functions as an electrode plate 11. The resistance heating body 10 is connected with an AC electric source 12 and a pair of the electrode plates 11 is connected with a DC electric source 13 or the AC electric source. Therefore, both sides of the prepreg material 1 is heated between the plate heaters 2 and the heat thus produced is transmitted from the material surface by the resistance heating bodies 10 and, at the same time, the material is energized by the electrode plates 11 to be heated from its interior.