The "guide pillar" in the mold is also called "guide pillar", and its function is to guide.
The function of the mold guide device is to guide the upper mold and the lower mold to align in the correct position.
The most common guide device is the guide post and guide bush. In addition, large molds may be equipped with guide plates, and micro dies may be equipped with guide tubes, which have the same function as guide posts and guide sleeves.
Since the sliding fit between the guide post and the guide sleeve involves frequent sliding in and out, the following requirements must be put forward for the guide post.
① The guide pillar should have good lubrication performance, and a lubricating oil groove should be provided if necessary.
② In order to ensure the working strength of the guide post, the diameter of the fixed part of the guide post is required to be 1. 5 to 2 times the diameter of the working part of the guide post.
③ The roughness Ra of the guide pillar working surface should not be greater than 0. 63pm. ④The working surface should be wear-resistant and have a certain hardness. The surface hardness after heat treatment is 50-55HRC.