| 摘要 |
PURPOSE:To make it possible to mold a microminiature double-sided synchronous belt by a method wherein an inner mold, which is in the state being supported by a single shaft, is inserted in an outer mold and said shaft is moved up and down along the center line of the socket-and-spigot joint part of an outer mold seating platen. CONSTITUTION:A socket-and-spigot joint part at the bottom of an outer mold 11 is fitted to a socket-and-spigot joint part 2a on a seating platen 2 in order to set the outer mold onto the seating platen. A shaft 4 is stopped under the state of being raised along the center line N of the outer mold 11 to the upper predetermined position. The fittingly inserting hole 14 of an inner mold 12 is fittingly inserted with a chain block 21 onto the shaft so as to support the center line N part of the inner mold 12 by fitting the top end of the shaft 4 to the recess 13 of the inner mold. Through the insertion of the inner mold 12 in to the outer mold 11 by lowering the shaft 4 and the abutment of the upper cover 12a of the inner mold 12 against the upper end of the outer mold 11, the mold assembling work is completed. A double-sided synchronous belt is molded by filling plastic synthetic resin such as urethane resin or the like in a cavity between the outer mold 11 and the inner mold 12. Thus, the shifting between the center of the outer mold 11 and that of the inner mold 12 can be controlled within about 0.026mm. |
