| 摘要 |
PURPOSE:To position a center block accurately to a template. CONSTITUTION:A recessed groove 51 extended in the longitudinal direction is formed to the mounting surface 3a of a template 3. A center block 6 is fitted into the recessed groove 51, and installed to the template 3. The end faces of chases 7 are abutted against the left and right side faces of the center block 6, and these chases 7 are mounted to the template 3. The center block 6 forms a shot cavity 15 and runners 17, 18, 19. The chases shape a runner 22 and a mold cavity 23. A positioning block 28 is also fitted into the recessed groove 51. Accordingly, the center block 6 can be positioned positively in the horizontal direction particularly, and the end faces of the chases 7 are abutted positively against the side faces of the center block 6. The center blocks 6 of a top force and a bottom force 1 are mutually abutted accurately by the positioning clock 28 on mold clamping. |
