| 摘要 |
PURPOSE:To constitute the titled equipment so that mechanical strength, structure and manufacturing cost of the same are high, simple and low respectively and the same is suitable for mass production of a deep drawn hollow product, by so constituting the title method that a parison which has come out of an extrusion die is sucked to a cavity and parting line while mold clamping is being performed. CONSTITUTION:A parison 4 is hung down and supplied into a released space of a male and female molds 1, 2 through an extrusion die 3 of an extrusion machine. A female mold side 4' of the parison 4 is made about ten times as thick as of a male mold side 4'' of that. While the male and female molds 1, 2 are moved on the center line X-X towards a parting line for molding, the parison 4 is sucked to the external fringe 20 of a cavity 8 when an action of vacuum drawing is performed. The inside 5 and outside 6 which are to be a molded product are formed, an air blowing needle 17 is inserted into a hollow part 16 of that elemental molded product by a cylinder 19 for pressurized air into which the pressurized air is blown. Then the parison 4 is welded with pressure strongly to the whole area through application of pressurizing and vacuum force to the parison 4 through the cavity 8 and the inside and outside of the parting line, through which a deep drawn hollow product is molded. |
