| 摘要 |
Mould in which a sliding block provided on its front surface with a hollow core is provided on the face of a mould with core, there being provided, in its rear part, an inclined surface, which receives pressure, provided with guide grooves on opposite sides, projections being provided which fit into the aforesaid grooves on opposite sides in a corresponding position of a cavity mould which corresponds to it, delineating a body of the block formed in its front surface with an inclined pressure surface in contact with the inclined surface which receives the pressure from the rear part of the sliding block and the sliding block receives an alternating movement in association with the coupling and uncoupling of the mould with core and the mould with cavity. Figure 2. <IMAGE>
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