| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a blow molding method which enables two blow pins to be surely inserted into a resin. <P>SOLUTION: A first blow pin 14a is inserted into a resin P from a portion of the resin P clamped by a mold 12. Therefore, the first blow pin 14a can be inserted into the resin P while the mold 12. prevents the resin P from escaping After expanding the resin P by blowing air into the resin P from the first blow pin 14a, a second blow pin 15a is inserted into the resin P from a portion different from that of the first blow pin 14a while blowing air into the resin P from the first blow pin 14a. Therefore, the second blow pin 15a can be inserted into resin P while making a state that an internal pressure of the resin P high by the air blown from the first blow pin 14a. Therefore, the second blow pin 15a can be also surely inserted into the resin P. Consequently, the two blow pins 14a, 15a can be surely inserted into the resin P. <P>COPYRIGHT: (C)2013,JPO&INPIT |
