What Is the Opening and Closing Die Process in Long Screw Forming Machines?

Release time：2020-01-16 18:44 Browse：

In the cold heading manufacturing process of long screws, the opening and closing die process of the forming machine is a critical step, especially when using multi-station cold heading machines.

This process refers to the repeated opening and closing actions of the dies during operation, allowing the metal blank to be shaped and transferred between stages.

In simple terms:

• Die closing (molding): The die closes, and the metal blank is forged or deformed inside the mold cavity to form the head or other shapes.

• Die opening: The die opens to release the formed part and transfer it to the next station for further processing (such as stretching or necking before thread rolling).

In the production of long screws, this process is particularly important because:

• The screw shaft is long, and deformation forces are high;

• The precision of the die opening/closing affects:

• Part alignment,

• Complete forming,

• Avoiding jamming or bending,

• Maintaining straightness and concentricity.