| 摘要 |
PROBLEM TO BE SOLVED: To improve the strength of a synthetic resin product by securely suppressing the generation of the weld line of the synthetic resin product.SOLUTION: The mold has a constitution where a first runner 41 and a second runner 42 branched from a sprue 40 are respectively connected to a cavity 10. A fist valve 51 freely opening/closing the fist runner 41 is installed in the first runner, further, the first runner 41 is provided with a material pool 6 freely opening/closing with the second valve 52 on the opposite side of the sprue 40 with the first valve 51 sandwiched, and an electromagnetic induction heating apparatus 7 of heating a weld part 12 is provided. |
