Answer: (1) the inclined guide post is mainly used to drive the open-close motion of the slider 

(2) the slider is an important component of the inclined guide post core-pulling mechanism, which is installed with the side core, the reliability of core-pulling is ensured by its precision. 

(3) the locking block should be removed first to prevent the side core from moving under the force during the molding.

(4) the role of the positioning device is to ensure that the slider stays in the place just away from the inclined guide post without any movement, so as to avoid that the inclined guide post can not be inserted into the inclined guide of the slider accurately when the mould is closed again.