| 摘要 |
<p>PURPOSE:To eliminate an adjustment by a pressure of a pre-blown gas and quantitatively adjust the supply of a slight-pressure gas with high accuracy. CONSTITUTION:A hollow molded piece production device comprises a nozzle 10 provided with an extruding port 11 through which a melted raw material is extruded to be formed into a parison and an air blow hole 9 through which a gas is injected into the parison; a gas quantity measuring and supplying means 21 for supplying a gas to the air blow hole; a gas quantity adjusting means 25 for adjusting a gas quantity to be supplied into the parison by the gas quantity measuring and supplying means 21; an extruding quantity adjusting means 26 for adjusting an extrusion quantity of a raw material; and a control means 20 for controlling the operations of the gas quantity measuring and supplying means 21, the gas quantity adjusting means 25, and the extruding quantity adjusting means 26 in accordance with a product shape to be molded.</p> |
