According to the simple manual for use of die design [11], slide guide pillar (gb2861.1-1990) is selected. The diameter deviation of guide pillar is H6, and the surface finish is ra = 0.2<br>Guide post (mm): diameter × length (40 × 120)<br>The sliding guide sleeve (gb2861.1-1990) is selected according to the concise manual of using mold design [11].<br>Guide sleeve (mm): inner diameter × length × outer diameter (40 × 125 × 55)<br>Matching dimensions of guide post, guide sleeve and upper and lower die base plate:<br>When selecting the length of the guide post, it should be considered that when the die is closed, the distance between the end face of the guide post and the plane of the upper die base plate is not less than 10 ~ 15mm, and the distance between the guide post and the plane of the lower die base plate is not less than 2 ~ 5mm. The distance between the guide sleeve and the upper plane of the upper die base plate shall be more than 3mm, which is used for exhaust and oil drainage.<br>
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