| 摘要 |
PURPOSE:To surely prevent parison from generating a warp or a flow by a method wherein a cavity of a molding tool is provided with an ejecting device ejecting an air blowing device and a sucking device sucking the parison to the surface of the cavity of the molding tool. CONSTITUTION:The title device is constituted so that a needle 8 arranged frequentably and movably close by one side cut-off part of both molding tools 3, 3 is not projected always from a cavity surface 7a with a shrinking action of an air cylinder 9, but projected into a cavity 7 of both the molding tools 3, 3 through an extending action of the air cylinder 9 at the time of blowing of air. A plurality of air vents 10, 10... are formed around the needle 8 further and the said air vents 10, 10... each are vacuum-drawn at the previous stage where the needle 8 is projected by an action of a negative pressure source. By this construction, parison A is sucked to cavity surfaces 7a each of both the molding tools 3, 3. With this construction, generating of a warp can be prevented reliably by running the parison A reliably along the cavity surfaces 7a each. In addition, as the amount of projection of the needle can be minimized, damage to the parison A can be prevented. |
