| 摘要 |
<p>PURPOSE:To prevent the ooziness and the change of the shape of the molding material, and to facilitate mounting and demounting work by projecting and drawing in a preformer by means of a cylinder fitted to a die box and pushing up and holding it by means of an oil pressure cylinder. CONSTITUTION:The perfomer 26 is pushed up and held by means of the oil pressure cylinder from a lower section by wedges 42, 42 projected and drawn in by means of the cylinders 41, 41 attached to a lower section of the die box through brackets 40, 40. An incline 26a fast sticks to the die box and a V block 24 and an incline 26b to the die box D and the V block 24 and a drag 25 respectively, and the ooziness of the molding material from the joining surfaces of the outlets of the first, the second and the third introducing passages and preparatory molding holes 27, 28, 29 is prevented. Since the molding material extruded from extruding machines A, B, C is guided by the first, the second and the third introducing passages 21, 22, 23, the curves of inner surfaces thereof are symmetric in the width direction, the material is difficult to be affected by the difference of left and right box surfaces, and the desired extrusion shape is ensured.</p> |
