Adhesive mold

(The material or product sticks to the surface of the mold, causing local roughness of the product)

1. The mold surface finish is not good

2. The material shrinkage rate is too large or too small

3. The pressure is too high

4. Die ejector rod is not parallel

1. Increase the mold finish

2. Improve the shrinkage properties of materials

3. Appropriately reduce the molding pressure

4. Check whether the ejector rod is balanced

Lack of material and air hole

(Insufficient filling, the product has pores at the corners or opposite the injection port)

1. Insufficient pressure

2. Insufficient exhaust

3. The mold temperature is too high or too low

4. Insufficient quantity of materials

5. The pressing speed is too fast or too slow

1. Appropriate increase in pressure

2. Increase exhaust times

3. Adjust the mold temperature

4. Added materials

5. Adjust the clamping speed

Warpage and deformation

(Unevenness such as bending and deformation occurs after the product is released from the mold)

1. Short pressure holding time and insufficient assimilation

2. The material shrinkage rate is too large

3. The mold temperature is too high

4. Amorphous after molding

1. Increase pressure holding time

2. Change the material shrinkage

3. Appropriate adjustment of mold temperature

4. After the mold, the product will be shaped until the temperature drops

carbonization

(The undischarged gas burns at the corners of the product, etc., making the area black)

1. There is a dead angle in the mold

2. Insufficient exhaust

3. The mold temperature is too high

1. Improve the exhaust of the mold

2. Increase exhaust times

3. Reduce the mold temperature

Cracking

(product surface cracks)

1. Insufficient curing, mold temperature discomfort

2. Material shrinkage rate is too large

3. Unbalanced ejection of ejector rod

4. Inappropriate insert temperature

5. The mold surface is not smooth

1. Increase the curing time and adjust the mold temperature

2. Adjust the shrinkage of the material

3. Check whether the ejector rod of the mold is parallel

4. Appropriate preheating of inserts

5. Increase the mold surface finish

Bubbling, bubbling

(The surface of the product is raised after demolding.)

1. The mold temperature is too low, curing is not sufficient

2. There is moisture in the material

3. The mold temperature is too high

1. Increase the mold temperature and increase the curing time

2. Check the moisture detection of raw materials

3. Reduce the temperature of the mold

white dot

(There are different numbers of white spots on the surface of the product)

1. The mold closing progress is too slow

2. The mold temperature is too high, and the material has been pre-cured

3. Too many times and times of deflation

1. Fast mold closing after feeding

2. Reduce the mold temperature

3. Fast exhaust after mold clamping, reduce the number of exhaust

Seam

(The product has seams at the corners or at the joints opposite to the injection port)

1. The mold temperature is too high or too low

2. Mold closing speed is too fast or too slow

3. Insufficient curing

1. Adjust the mold temperature

2. Speed up or slow down the clamping speed

3. Increase the curing time