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Quickly understand the abnormal cause of die cutting products

xinstMar 31, 2020

Quickly understand the abnormal cause of die cutting products

I. Poor specifications (dimensions required by basic drawings die cutting)

1. The punch / knife die specification is wrong: (drawing size does not meet the requirements / die is not made according to the drawing);

Countermeasure: Remake the drawing or reopen the mold.

2. The theoretical specifications do not match the actual use: (the theoretical size of the product does not match the physical assembly, resulting in the assembly effect or function cannot be achieved);

Countermeasure: Remake the specifications and technical data according to the actual distribution effect, and change the product processing mold and confirm the actual distribution of the product.

3. Deformation caused by mold wear or damage: (Insufficient mold maintenance or improper use, resulting in excessive use of the mold or excessive wear)

Countermeasure: Regularly inspect the mold, confirm the mold life and maintenance methods, and regularly maintain and remake the mold.

 

II. Poor registration offset (big and small sides, or no at all)

1. When the material is cut or the paper is slit, the cutting edges are not uniform. If the subsequent positioning is based on the cutting edges, the hidden danger of die cutting will occur. Especially refers to paper release paper products.

Countermeasure: When stipulating the slitting or slitting, the material or release paper “S” edge difference requirements can be quantified and measurable; the storage conditions after the slitting of the rubber must be implemented in accordance with the regulations to prevent the relative displacement of the rubber material and the roll, which affects complex.

2. For the first composite of PET base paper products, the slitting edge or slitting edge is used as the positioning; when the first die cutting, it is usually punched and positioned, and when the second die cutting is used, the positioning is the first. Hole tracking formation. At this time, if the tracking hole during the third die cutting is punched again, the tracking hole twice will be relatively offset, which will affect the size of the final molded product.

Countermeasure: When punching the positioning hole in the second die cutting after die cutting, the speed of the first die cutting, the speed of the second compound and the relative position of the two materials are the key factors affecting the second die cutting. The positioning adjustment during the second die-cutting, in addition to the automatic chase of the machine, must also ensure the adjustment of the jump distance. The positioning hole is pressed in the direction of the paper ejection, and the front of the positioning hole is pressed, which means that the jump distance is not enough or the paper feed speed is slow; the positioning hole is pressed in the paper output direction, which means that the jump distance is too large or the paper feed speed is too fast.

3. There is a high probability that the products that have been compounded and die-cut many times will have large and small edges, so every time you compound and die-cut, you need to pay special attention to the material head and the tail; the difference.

III. multiple materials, colloidal residual silk, release paper or product burrs

1. The blade of the punch / knife die is worn or deformed, and the defect is the main reason.

Countermeasure: Regularly check and maintain the punching die, sharpness, deformation, or defect of the knife. Time, personnel, and maintenance methods need to be documented.

2, release paper or product burrs, except for material reasons, not enough punching or insufficient pad cutter, incorrect waste disposal methods are also the reasons.

Countermeasure: It is the key to test and confirm the punching effect of the first die or the first 10-15 die. Generally, it can be found and adjusted if the punching is not in place and the pad is not enough. The waste discharge method is wrong. The results of the mass production waste burr are counted. Comparing other waste discharge methods, you can get a solution.

 

IV.Defects such as bubbles, impurities, and edges of the protective film appearing on the surface of the die cutting product

All are caused by improper protection, maintenance of environmental cleanliness, incorrect squeezing of the product; excessive friction between products; all are the reasons. Cleaning and product seal protection in the workshop and during transport requires documented and operational practices and training.

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