The main steps of Lingzhong injection mold trial

In order to avoid unnecessary waste of time and troubles during mass production, it is indeed necessary to pay patience to adjust and control various processing conditions, find the best temperature and pressure conditions, and formulate standard injection mold trial procedures, Used to establish daily working methods.

1. Check whether the plastic material in the barrel is correct and whether it is baked according to the regulations.

2. The material pipe must be cleaned thoroughly to prevent inferior glue or miscellaneous materials from being injected into the mold, because inferior glue and miscellaneous materials may jam the mold. Check whether the temperature of the material pipe and the temperature of the mold are suitable for the raw materials to be processed.

3. Adjust the pressure and injection volume to produce a finished product with a satisfactory appearance, but do not run off the burrs, especially when some mold cavity products are not completely solidified, you should think about it before adjusting various control conditions, because the mold is filled A slight change in the rate may cause a large change in the filling of the mold.

4. Wait patiently until the conditions of the machine and mold stabilize, even for medium-sized machines, it may take more than 30 minutes. You can use this time to view possible problems with the finished product.

5. The advancing time of the screw should not be shorter than the solidification time of the gate plastic, otherwise the weight of the finished product will be reduced and the performance of the finished product will be impaired. And when the mold is heated, the screw advance time needs to be prolonged in order to compact the finished product.

6. Reasonably adjust to reduce the total processing cycle.

7. Operate the newly adjusted conditions for at least 30 minutes until they are stable, and then continuously produce at least a dozen full mold samples, mark the date and quantity on the container, and place them according to the mold cavity to test the stability of the actual operation And derive reasonable control tolerances.

8. Measure and record the important dimensions of the continuous sample (you should wait for the sample to cool to room temperature before measuring).

9. Compare the measured size of each mold sample, you should pay attention to:

(a) Whether the product size is stable.

(b) Whether certain dimensions have a tendency to increase or decrease, indicating that the machining conditions are still changing, such as poor temperature control or oil pressure control.

(c) Whether the size change is within the tolerance range.

10. If the size of the finished product does not change and the processing conditions are normal, it is necessary to observe whether the quality of the finished product of each cavity is acceptable and its size can be within the allowable tolerance. Note down the number of cavities that are continuous or larger or smaller than the average to check whether the size of the mold is correct.