| 摘要 |
PROBLEM TO BE SOLVED: To accurately control the rotating speed of a drive part and to prevent a molding fault from occurring. SOLUTION: The injection unit comprises a cylinder member, an injection member, the drive part, a rotary transmission system TR2 having a plurality of gears for transmitting the rotation generated by driving the drive part to the injection member, a gear box chamber 69 having the system TR2 arranged therein to house a lubricant, and a temperature regulator for regulating the temperature in the chamber 69. In this case, the temperature in the chamber 69 is maintained constant by the regulator, and the viscosity of the lubricant is made constant. As a result, since the resistance to be applied to the system TR2 by the lubricant is stabilized, the rotating speed of the drive part can be accurately controlled.
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