| 摘要 |
PURPOSE:To keep the supply amount of a stock material constant, by automatically and rapidly controlling an automatic back pressure valve, a control valve and automatic pressure control valve respectively. CONSTITUTION:An automatic pressure control valve 1 is provided to a stock material supply line 6 and a flow meter 2 having a control valve 7 is provided to the stock material supply line 6 at the downstream side of the automatic pressure control valve 1. A pressure controlling automatic adjusting mechanism 8 for measuring the pressure of the stock material supply line 6 between the automatic pressure control valve 1 and the flow meter 2 to generate a signal corresponding to the difference with set pressure to control the automatic pressure control valve 1 is provided while a flow amount controlling automatic adjusting mechanism 9 for measuring the flow amount of the flow meter 2 to generate the signal corresponding to the difference with a set flow amount to contol the valve 7 is mounted. To a product withdrawing line 11, a back pressure controlling automatic adjusting mechanism 10 for measuring pressures of an automatic back pressure valve 5 and the stock material supply line 6 to generate the signal corresponding to set pressure is mounted. |
