| 摘要 |
PROBLEM TO BE SOLVED: To reduce detection errors by providing a detector capable of detecting the movement amount of a compression core through a through hole which is formed along the moving direction of the compression core in a core compressing piston. SOLUTION: For example, a through hole 26-1 is formed along the moving direction of a compression core 27 in a core compressing piston 26, and a through hole 23-1 is also formed along the moving direction of the compression core 27 in the position of a movable platen 23 corresponding to the through hole 26-1. This results in the coaxial relation between the through holes 23-1 and 26-1. A sensor holder 12 is inserted into the through holes 23-1, 26-1, and a detector 10 is disposed at the side of the compression core 27 of the sensor holder 12, thereby directly detecting the movement amount of the compression core 27. This achieves the detection in high precision in an order of a micron, and precisely controlling the position of the compression core 27. As a result, resin volume in a cavity and a resin pressure can be precisely controlled. |
