To prevent air from being entrained between a mold and a molten resin when the mold is clamped for molding in a resin molding machine in which the molten resin is discharged on the mold through a T-die by using an injection device with the T-die set in a discharge opening.
The T-die 3 is set in the discharge opening of the injection device. The molten resin 5 is discharged from the discharge opening 4 of the T-die 3 on a lower mold 2. After the T-die 3 is retracted, an upper mold 1 and the lower mold 2 are clamped, and the molten resin 5 is molded to obtain a product in the shape of a flat plate. In the shape of the discharge opening of the T-die 3, the size in the transverse direction is larger than the size in the longitudinal direction, the lower side is formed by a convex curve, and the size in the longitudinal direction is gradually increased from both ends toward the center.
COPYRIGHT: (C)2007,JPO&INPIT
Yusuke Ishii
Hideaki Tachibana
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Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto