Nut die

Press bolt and spring unit:

(1) Pressing bolt unit: the types of pressing plate bolts are: (A). external screw type, (B). sleeve type, (C) Internal screw type. In order to keep the pressing plate parallel to the specified position, the stopping method of pressing bolt (shoulder contact part): (A). Die base recess bearing surface, (B). Punch fixing plate top surface, (C). Punch back plate top surface.

(2) Press spring unit: movable press plate press spring unit can be roughly divided into: (A), single use type, (B), combined with press bolt type

The following points shall be considered when selecting the pressing spring unit:

(A) Ensure the free length of the spring and the required compression amount (the spring with large compression amount should be placed in the concave of the pressing plate).

(B) Whether it is necessary to adjust the initial spring compression (pre compression) or load.

(C) Consider the ease of mold assembly or maintenance.

(D) Consider the relationship with the length of punch or pressing bolt.

(E) Consider the safety (to prevent the spring from flying out when it breaks).

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