What do injection mold parts manufacturers need to know when testing?

What should we pay attention to when trying? We know that injection molding is a very accurate process. There are many requirements and precautions in the actual operation. Today, let's take a look at what we should pay attention to when testing the injection mold?
Prepare DFM. The responsible engineer needs to prepare DFM to check the die structure in detail. If there are any questions, they need to be clarified on the spot. If there is a problem, it needs to be recorded in the test condition table for feedback and correction. ·
Check the water connection mode, all kinds of condition setting items need to be qualified one by one, if it cannot be corrected immediately, it needs to be corrected immediately. Before 90-95% of the product is shot, it is necessary to estimate the product and determine the position of the voltage maintaining switch according to Moldflow condition. The product needs to be kept at 0 pressure, the stable 90% to 90% of the filled product is stable, and the screw needs to store about 10% of the material (when the mold has a mold with multiple cavities, you need to check whether the feeding of each cavity is uniform, otherwise you need to keep the sample to facilitate mold adjustment), and then slowly increase the pressure by 10 pressures until the product is finished Until the appearance is good. Confirm size and appearance. After the appearance of the product is adjusted to an acceptable state, take two molds, soak them in water for 2-5 minutes, and then measure the size.
According to the product size, in the case of no assembly requirements, adjust the size according to the drawing, and then limit; secondly, adjust the appearance of the structure and fine tune the injection parameters, print out the number of samples required for good appearance and structure (confirm shrinkage, burr, insufficient material, bonding line and other defects), and record the condition and molding condition table for next use, such as If it is an insurmountable need to keep sample records, it is convenient to check and improve the countermeasures. Before injection, the mold temperature and water inlet and outlet temperature of water pipe should be confirmed, and 10 molds should be confirmed. After 30 times of molding, it stabilized at least three times. The inlet and outlet temperatures of each water pipe need to be measured. The temperature difference between each inlet and outlet shall not exceed 3 degrees. Check the water flow and connection immediately. ·Confirm the clamping condition.
If the product has burr after shooting, it is necessary to call the fitter to the site immediately, spray red lead on the machine, and then close the mold at low speed and low pressure of about 30bar to confirm the tightness of the mold. ·Doe analysis to find the appropriate conditions. If a satisfactory product size or deformation cannot be obtained in the case of multiple molding adjustments, the DOE analysis table will be discussed by the engineering and adjustment technicians, and may affect the product problems. Adjust and combine the parameters, carry out item by item test according to the plan, make condition records and sample records for each change condition, and carry out CPK analysis. After the completion of the test and evaluation, select better conditions for the next reference.
Early detection and early resolution. If there are deformation and size problems in the soft die stage, we must try to solve these problems in the soft die stage, otherwise we will lose the significance of opening the die. Die change program when the need to change the mold, need to inform the customer, and can not modify the mold in private. Any changes need to be approved by the customer.

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