| 摘要 |
PROBLEM TO BE SOLVED: To enable thermal opening of a gate by heating a gate tip before injection and to enable keeping of a resin melt at the gate during a dwelling process and prevention of leak of the resin from a gate part on the occasion of release, in order to lessen a shrinkage factor distribution in a molded article and to make a dimensional accuracy excellent. SOLUTION: Before and during an injection process, the gate tip is heated so that a solidified resin of the resin gate is put at a melting temperature+20°C to be lower than a decomposition start temperature. During the dwelling process, the gate tip is heated so that the resin of the resin gate is kept at the melting temperature to be lower than the melting temperature+40°C. In a cooling process, heating of the gate tip is reduced or stopped so that the resin of the resin gate is put at a temperature lower than the melting temperature. COPYRIGHT: (C)2005,JPO&NCIPI
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