What are the reasons for damage to the injection mold?

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1. When the upper mold is retracted, the injection molding machine ejector pin is higher than the injection molding motor template surface, and the injection molding machine damages the mold or the injection molding machine ejector cylinder or machine hinge when the injection molding machine is closed.

1. When erecting the mold, adjust the retracting position of the ejector pin so that it is lower than the moving template surface when retracting.

2. The thimble is not disengaged, and the mold is closed when the mold is removed.

1. When demolishing the mold, first check the ejector pin before it can be closed.

3. The product with high ejection capacity (≥6MM) can be demoulded, and the upper mold clamping mold is separated. [The moving (static) mold is fixed on the machine table, and then the static (moving) mold is installed, and the static and dynamic mold is repaired. This happens from time to time. At present, there is only one set of external bracket molds. When the mold is installed, the static and dynamic molds are not horizontally clamped at the same time, and the dynamic model core is easily collided with the static model cavity to damage it.

1. Such molds are disassembled and repaired together with the static and dynamic molds when the mold is repaired. After the repair, the molder can close the static mold to pull into the injection molding production.

2. If the mold is closed in the injection molding, the static and dynamic molds can be clamped at the same time. If there is a mold in the middle plate, try to close the middle plate to the rear of the upper mold of the mold.

3. Such molds should be contacted by the molder and the design is fundamentally preventive.

4. Repair the moving mold or static mold. After repairing, the direction of the static and dynamic molds is inconsistent (the static and dynamic molds are reversed), and the mold is closed.

1. Confirm the appearance of the mold, and the mold can be closed when the direction is the same.

2. When the label is not clear or there is no label, it should be handled by the corresponding molder foreman, and it is forbidden to handle it at will.

5. When removing the cleaning mold slider (or repairing the slider), the slider is installed in the opposite direction.

1. Confirm the appearance of the slider. When the direction of the label is the same, you can close the mold. If the label is not clear or there is no label, you should find the corresponding molder for the foreman to handle.

2. Confirm the product and install the slider according to the appearance of the product or the direction of the static mold.

6. When the slider is loaded into the mold, the force is too strong, and the slider collides with the mold to damage the insert and the core.

1. Install the slider carefully and carefully.

7. When installing the slider or adjusting the slider, the slider moves too far into position, and the thimble collides with the slider when it is top.

The position of the slider needs to be confirmed. When unloading the slider, it is best to engrave the mark to facilitate the upper slider.

8. When the slider is removed, the mold is closed, causing the front and rear cores to touch each other.

1. When the slider is removed, it is not allowed to close the mold. If the slider is removed and then the mold is removed, the static and dynamic mold should be removed separately.

9. The mold clamping is too small, the mold is loose or the mold is not tightly closed. When the mold is opened, the guide post is broken.

1. The static and dynamic molds are equipped with at least 4 code clamps on each side and need to be locked.

2. The pressure speed of the seat should be as small as possible, and the speed of the seat should be slowly entered.

10. When the mold is unloaded separately, the center of gravity of the mold, inertia, and the collision of the static and dynamic molds will damage the mold.

When loosening the last code die clamp screw, press the half die to be unloaded by hand to prevent the swing; another product is placed in the cavity to prevent damage to the cavity when colliding.

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1. The automatic machine top ejection mode (ejection position, ejection times, etc.) is improperly adjusted, and the product is not demoulded.

1. The product can be demolded in two times. It is generally set to 3-4 times. The height of the ejector is set to be higher than the product height of 3MM.

2. Fully automatic products, the product lacks the glue top and the mold is not pressed.

Improper molding adjustment; poor sealing of the machine.

3. Semi-automatic product, product unmolded mold clamping

1. Employees' work awareness is sloppy and strengthens employee training.

4. Monitor alarm, no semi-automatic production of three-mode, no inspection of mold conditions, automatic production of compression mold (in this case, the most frequent compression mold)

1. Train employees to work as required.

5. The monitor has an image display, but the monitor is not monitored or other reasons are not monitored. The mold is not demoulded when the product is in place (in this case, the stamper is the most)

1. Train the staff to check the monitor once every two hours to ensure the monitor is effective.

6. The ejection height is too high, and the thimble is damaged.

1. The thimble diameter is below 1MM and the thin flat top is below 1MMX1MM, and the ejection height should be precisely controlled. All molds should be lifted from the lowest position when they are topped out.

2. Contact the molder and design to do the thimble limit treatment.

7. The thimble is not in place or the return spring force is not enough. The ejector pin does not retreat. The employee can adjust the thimble micro-motion protection switch at will or the micro-motion protection switch is not adjusted when the machine is turned on or the micro-switch such as the unmanned micro-switch is produced midway. The thimble does not retreat when acting, resulting in compression molding

1. The lubrication and maintenance of the mold should be standardized.

2. The maintenance inspection of the mold should be standardized.

3. The team leader must train each employee to understand the microswitch inspection method.

8. During production, the thimble of the injection molding machine is loose, displaced, the product is not demoulded, and the mold is clamped.

1. Confirm the condition of the mold thimble when the upper mold is used.

2. Try not to use excessive thimble pressure and too fast ejector speed during production.

9. The slider is not retracted, causing the thimble to be broken or the slider to be damaged when it is ejected.

1. The lubrication and maintenance inspection of the mold should be standardized.

10. The mold opening speed is too fast, the slider moves off, and the mold is damaged when it is ejected or closed.

1. The mold opening speed should be adjusted as appropriate after leaving the shovel.

11. Using a sharp hard object such as steel wire iron to dig the mold to cause mold damage

1. Employee training protects the awareness of the mold.

12. The product is poorly ventilated. Grinding the mold with a trowel or coarse sandpaper causes flash or cavity damage in the mold.

1. Try to clean the mold with gasoline or acetone, and carefully clean the vents with the flashing knife; you need to find the molder to add the exhaust.

2. Provincial mold polishing requires 1200# fine or fine sandpaper.

3. It is forbidden to sand the mold with a large area of ​​sandpaper.

13. Nozzle flow glue, cold mold clamping

The material is not dried; the back pressure is too large; the looseness is slightly shorter; the mouth temperature is too high.

14. The large machine is equipped with a small mold, the clamping force is too large, and the mold is damaged.

1. The mold can be locked without flash, and the clamping force is adjusted from the minimum.

15. Skeleton mold core sticking mold clamps the product with pliers and damages the core column

1. Remove the slider and use a blade to cut the glue position on the iron column.

16. The front and rear mold inserts have many and fine product sticking molds, directly clamping the mold, and crushing the mold.

1. A piece of hot glue should be applied to the mold part immediately, and the edge of the hot glue should be a little thicker.

After the hot glue is cooled, use the pliers or other iron rods, the glue mold position will be brought up.