1. There are patterns on the surface of the castings and traces of metal flow.

Reasons: 1. The flow channel leading to the inlet of the casting is too shallow.2. The pressure-injection ratio is too large, causing the metal flow rate to be too high, causing the metal liquid to splash.Adjustment method: 1. Deepen the gate runner.2. Reduce the pressure injection ratio.

2. There are small bumps on the surface of the casting

Causes: 1. Rough surface.2. There are scratches, pits, and cracks on the inner surface of the cavity.Adjustment method: 1. Polishing the cavity.2. Replace the cavity or repair it.

3. There are push rod marks on the surface of the castings, and the surface is not clean and rough.

Causes: 1. The push rod (top rod) is too long; 2. The surface of the cavity is rough, or there may be debris.Adjustment method: 1. Adjust the length of the push rod.2. Polish the cavity to remove debris and oil stains.

4. Cracks or local deformation on the surface of castings

Causes: 1. The distribution of the ejector rod is uneven or the quantity is not enough, and the force is uneven: 2. The fixing plate of the ejector rod is skewed during work, resulting in a large force on one side and a small force on the other, causing the product to deform and crack.3. The wall of the casting is too thin and it will deform after shrinking.Adjustment method: 1. Increase the number of ejector rods and adjust their distribution position to balance the ejection force of the castings.2. Adjust and reinstall the push rod fixing plate.

5. There are pores on the surface of die castings

Cause: 1. There is too much lubricant.2. The vent is blocked and the vent cannot be discharged.Adjustment method: 1. Reasonable use of lubricants.2. Add and repair vent holes to make the exhaust unobstructed.

6. There are shrinkage holes on the surface of the casting

Cause: The craftsmanship of die castings is unreasonable, and the wall thickness changes too much.The temperature of the liquid metal is too high.Adjustment method: 1. In the place of wall thickness, increase the process hole to make it evenly thin and thick.2. Reduce the temperature of the liquid metal.

7. The outer contour of the casting is not clear, it cannot be formed, and it is partially in arrears.

Reasons: 1. The pressure of the die-casting machine is not enough, and the pressure-injection ratio is too low.2. The thickness of the inlet is too large; 3. The position of the gate is incorrect, which will cause a positive impact on the metal.Adjustment method: 1. Replace the die-casting machine with a larger die-casting ratio; 2. Reduce the thickness of the inlet runner; 3. Change the position of the gate to prevent frontal impact on the casting.

8. The part of the casting is not formed, and the cavity is dissatisfied.

Causes: 1. The temperature of the die-casting mold is too low; 2. The temperature of the liquid metal is low; 3. The pressure of the press is too small; 4. The liquid metal is insufficient, and the injection speed is too high; 5. The air cannot be discharged.Adjustment method: 1. Increase the temperature of the die-casting mold and liquid metal; 2. Replace the high-pressure die-casting machine.3. Add enough liquid metal to reduce the injection speed and increase the thickness of the inlet.

9. Dissatisfied filling at the acute corners of die castings

Causes: 1. The inlet of the inner gate is too large; 2. The pressure of the die-casting machine is too small; 3. The ventilation at the acute angle is not good, and the air cannot be discharged.Adjustment method: 1. Reduce the inner gate.2. Replace the die-casting machine with high pressure.3. Improve the exhaust system

10. The structure of the castings is loose and the strength is not high.

Causes: 1. The pressure of the die-casting machine is not enough; 2. The inner gate is too small; 3. The vent is blocked.Adjustment method: 1. Change the press.2. Increase the inner gate.3. Check the vent holes and trim the ventilation.

11. There are pores in the castings.

Causes: 1. The flow direction of the metal liquid is incorrect, and the cavity of the die casting has a frontal impact, which produces eddy currents, which surround the air and produce air bubbles.2. The inner gate is too small and the flow rate of the metal liquid is too large, which blocks the vent prematurely before the air is discharged, leaving the gas in the casting.3. The dynamic model cavity is too deep, making it difficult to ventilate and exhaust.4. The design of the exhaust system is unreasonable and the exhaust is difficult.Adjustment method: 1. Correct the shunt cone is too small and the shape is too small to prevent the frontal impact of the metal flow on the cavity.2. Appropriately increase the inner gate.3. Improve mold design.4. Reasonably design the vent holes to increase the air holes.

12. Impurities in castings

Causes: 1. The metal liquid is not clean and has impurities.2. The alloy composition is impure.3. The mold cavity is not clean.Adjustment method: 1. Pour in and remove impurities and slag.2. Replace the alloy.3. Clean up the mold cavity to make it clean.

13. During the die-casting process, liquid metal splashes out

Reasons: 1. The adhesion between the moving and fixed molds is not tight, and the gap is large.2. The clamping force is sufficient.3. The pressure plate and the fixed template are not parallel.Adjustment method: 1. Reinstall the mold.2. Increase the clamping force.3. Adjust the die-casting machine so that the moving and fixed molds are parallel to each other.