Name: Aluminum Shell Stamping
Brand: Shanghai Yixing Technology Co., Ltd.

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Classification of Compound Stamping Die Structures

According to the nature of the compound process, it can be divided into:

Punching compound mold: such as material cutting composite mold.

Forming compound molds: such as composite extrusion molds.

Compound die for blanking and forming: such as a composite die for material cutting and deep drawing.

According to its structural form, it can be divided into:

Sequential compound mold: a compound stamping die with a concave mold device in the lower mold.

Inverted compound mold: a compound stamping die with a concave mold device in the upper mold.

Comparison of Compound Stamping Die Structures:

	Inverted composite mold	sequential composite mold
Leakage	From the leakage hole of the lower mold	Return to the mold working surface
Output	From the upper mold	From the bottom mold
Operation	Safe and convenient	Poor operation
Workpiece	Poor flatness	Good flatness
Stress	Poor stress and poor strength	Good stress
Wear	Relatively small	Relatively large
Working face	Easy to clean	Difficult to clean

Through the above comparison, it can be seen that their applicable range is:

1. Inverted composite molds are suitable for punching parts with low requirements for flatness and sufficient strength of convex and concave molds;

2. The sequential composite die is suitable for punching thin materials or composite dies with high requirements for flatness, insufficient strength of convex and concave dies, or without punching waste.

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