| 摘要 |
PURPOSE:To carry out resin sealing under the same condition of molding and ensure a uniform package molding by measuring the degree of vacuum in a template on the occasion of causing a plunger to advance, thereby controlling a starting time of the plunger according to the measured value. CONSTITUTION:The insides of templates 21 and 27 are vacuum-exhausted by placing resin tablets into a transfer pot in the template 21 and also by using a suction system 25 and after that, the resin tablets are pressure-fed into cavities 23 and 29 by causing a plunger 26 to move forward to perform a resin sealing. In such a case, on the occasion of making the plunger 26 move forward, the degrees of vacuum in the templates 21 and 27 are measured by a vacuum gauge 24 a starting time of the plunger 26 is controlled according to the measured values. Under these situation, once the inside of the template comes to a prescribed vacuum state, this device permits the plunger 26 to move forward and the resin tablets to be fed under pressure in the cavities 23 and 29. |
