AUTOMATIC WEIGHT CONTROL OF MOLDED PRODUCT IN ROTARY POWDER COMPRESSION MOLDING MACHINE

摘要

PURPOSE:To permit pelletizing operation for a long period by converting temp. change of a molding machine to the change of the quantity of electricity using a temp. sensor, etc. and operating a relay for the temp. sensor and a prime mover depending upon the change of the quantity of electricity. CONSTITUTION:A temp. sensor 30 provided to below a rotary disc 1 and close to a position where a lower pestle 9 passes by the revolution of the rotary disc 1, senses the temp. change of the rotary disc 1 and a part of the lower pestle 9. The sensed change is amplified by an amplifier 31 for the temp. sensor and converted to the change of quantity of electricity. The quantity of electricity corresponding to the temp. rise actuates a prime moter 24 for pressure control through a relay 32 for the temp. sensor. Then, a pressure controlling worm 23 attached to the prime moter 24 rotates a worm gear 22 for controlling pressure to drop a pressure controlling rod 21. Thus, the height of a lower roll 20 is adjusted by an amt. corresponding to a thermally expanded dimension due to the temp. rise.