PURPOSE: To produce efficiently a conductive molded piece free from faulty phenomena such as a flow mark etc. by supplying conductive thermoplastic resin molten material on to a bottom force by parallel reciprocation of an extruder, then closing the top and bottom forces and pressing the molten material.
CONSTITUTION: An extruder 5 is advanced as far as a position suitable to supply conductive thermoplastic resin molten material on to the bottom force 4 and said conductive thermoplastic resin molten material 20 is supplied from a supply passage 6 on to the bottom force 4. After supply of the material, the extruder 5 is withdrawn as far as a position capable of closing a top force 3 and the bottom force 4. Thereafter, the top force 3 or the bottom force 4 is moved and closed to press, shape and cool said molten material 20 and then the forces are opened to take out the molded piece. The molded piece obtained has an excellent appearance free from faulty phenomena such as a flow mark etc. and inward cambering, torsion, etc. of the side wall.
OOISHI KANEMITSU
OOMURA YOSHIHIKO
MITSUI KIYOSHI
| JPS5611955A | 1981-02-05 | |||
| JPS57177047A | 1982-10-30 | |||
| JPS56129151A | 1981-10-09 |
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