In the production process of Metal Stamping molds, there is often a phenomenon of metal stamping mold bursting, which leads to the inability of the production line to produce and affects the normal production order of the stamping processing plant. Stamping die cracking is a very common phenomenon. Usually, stamping dies only crack a small gap, but in severe cases, stamping dies may split into several pieces, which may affect the quality of the die. There are many reasons for mold cracking:

1、 Selection of Press Machine

To improve the service life of metal stamping molds, it is necessary to select a suitable press machine. On general open press machines, the uniform regrinding life is 10000-30000 times, while on new precision press machines, the regrinding life of stamping dies can reach 60000-120000 times. Especially for small or no gap stamping dies, hard alloy stamping dies, and fine stamping dies, it is necessary to choose a press machine with high precision and good rigidity. Otherwise, it will reduce the lifespan of the die, and in severe cases, it may also damage the die.

2、 Reasons for mold design

In general, if the stamping die is designed with an unreasonable structure, insufficient strength, too close cutting edge distance, insufficient number of template blocks or no cushion pads, then the die faces a great risk of bursting. Mold design primarily includes the following points:

1. Layout and edge alignment: The reciprocating feeding layout method often causes damage to the mold, and if the edge alignment value is too small, it also increases the wear of the stamping mold. Therefore, selecting a reasonable layout method and edge alignment value can extend the lifespan of the mold and prevent it from bursting.

2. Precision of guiding mechanism: Accurate and reliable guidance can reduce the wear of the mold, prevent the occurrence of convex and concave die biting, and is particularly suitable for the use of blank and small gap punching dies, composite dies, and multi station progressive dies. In addition, in order to improve the lifespan of the mold, it is necessary to select the correct guiding method and the accuracy of the guiding mechanism based on the nature of the processing technology and the precision of the mold parts.

This article is from EMAR Mold Co., Ltd. For more EMAR related information, please click: www.sjt-ic.com，