PURPOSE: To detect resin pressure indirectly and thereby avoid the occurrence of retaining spots of resin by attaching a thrust bearing adapted to support axial force to the support member variable in the axial direction, and by detecting force affecting the support member.
CONSTITUTION: A thrust bearing 7 is provided on the rear position of a hollow shaft 4c, and a disc-like support member 13 designed to be displaceable in the axial direction is secured on the rear end of the hollow shaft 4c. In the center of the support member 13, a piston rod 14 is provided projectingly rearwardly and fitted into a cylindrical oil sealed case 15 projected on the center of the end part 12a of a housing 12. An oil seal 16 is provided on the rear end of a piston rod 14, and oil 18 is sealed in the rear part within the oil sealing case 15, and further a pressure detector 9 and pressure indicator 10 are secured on the rear end thereof. Thus, pressure within the cylinder can be detected indirectly.
KONNO MASASHI
MINAGAWA KOJI
FUKANO NORIFUMI
KAMIMURA TATSUYA
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