| 摘要 |
PURPOSE:To prevent flashes from growing at pinch-off sections on both sides of an inlet section by controlling and pinching off the squeeze width of a parison in the pinch-off section on the extending side of the inlet cavity within the width of the inlet cavity. CONSTITUTION:The tip of a parison 3 located at a sectional mold 2b before closure of the mold is squeezed by the rear end section of the front sectional mold 2a of the front side after closure of the mold, the width of the tip section of the parison 3 is controlled between both projections 7a, 7b of the parison width controlling piece 7 installed at the pinch off section on the extending side of the cavity 5 of the inlet section. Flashes due to squeeze-out resin are not found at the pinch off section on the extending side of the inlet. |
