The main steps of the test model

- Apr 17, 2018-

          In order to avoid unnecessary waste of time and problems in mass production, it is indeed necessary to pay patience to adjust and control various processing conditions, and to find the best temperature and pressure conditions, and to formulate a standard test mode program, which can be used for Establish daily work methods. 1. Check whether the plastic material in the cylinder is correct and whether it has been baked according to the regulations. (It may be possible to obtain different results if the trial mold and production use different raw materials.) 2. The cleaning of the feed pipe should be thorough so as not to inject the rubber or miscellaneous material into the mold, because the mischief of the rubber and miscellaneous materials may cause the mold to die. Check whether the temperature of the feed pipe and the temperature of the mold are suitable for the processed raw materials. 3. Adjust the pressure and shot volume in order to produce a finished product with satisfactory appearance, but you can't run burrs, especially if there are some cavity products that have not yet completely solidified, you should think about it before adjusting the various control conditions. A slight change in the rate may cause very large mold changes. 4. Be patient and wait until the conditions of the machine and the mold are stabilized, that is, the medium-sized machine may have to wait for more than 30 minutes. You can use this time to see possible problems with the finished product. 5. The screw advancement time must 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 also needs to be lengthened in order to compact the finished product.

6. Make reasonable adjustments to reduce the total processing cycle. 7. Operate the newly adjusted conditions for at least 30 minutes until they are stable. At least one full dosing sample is then continuously produced. Mark the date and quantity on the holding device and place them on the mold cavity so that they can be tested for stability. And derive reasonable control tolerances. (Especially valuable for multi-hole molds). 8. Measure and record the important size of the continuous sample (the amount should be allowed to cool when the sample is cooled to room temperature). 9. Compare the size of each model sample and note that:        (a) Is the size of the product stable?        (b) Whether there is a tendency for some sizes to increase or decrease shows 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 finished product dimensions do not change and the processing conditions are normal, it is necessary to observe whether the quality of the finished product of each cavity can be accepted, and its size can be within the allowable tolerance. Record the number of the cavity that is continuous or large or less than average to check if the size of the mold is correct.