| 摘要 |
PURPOSE:To easily perform automatic conversion of many kinds of colored molding materials by constituting the title supplying device so that an auxiliary hopper comparted into two chambers is provided to the supply part of the molding materials via an automatic changeover valve and one chamber of the supply side of the molding materials is regulated to negative pressure by means for negative pressure. CONSTITUTION:When injection molding based on the preceding molding material is finished and moldings (a slide fastener chain) having new color is produced, firstly a vacuum pump 9 is actuated and also automatic changeover valves 21, 25, 32a, 33a are changed over and controlled. Powdery old molding materials which are stuck to the insides of a first and second auxiliary hoppers 22, 23 and remain therein are discharged to the outside through an air suction pipe 91. Then after the prescribed amount of material for cleaning is sucked and collected in the first auxiliary hopper 22, the material for cleaning is supplied to an injection cylinder 12 and no-load operation of an injection molding machine is performed to clean the old molding materials. Thereafter the fresh molding materials are sucked and collected in the first auxiliary hopper 22 and then supplied into the injection cylinder 12 and injection molding is started. |
