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 in the cylinder is correct and whether it has been baked according to the regulations. (If the trial mold and the production use different raw materials, it is possible to get different results.)
2. The cleaning of the material pipe should be thorough so as to prevent the plastic material or miscellaneous material from being injected into the mold, because the plastic material and miscellaneous materials may be stuck in the mold. 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. However, if there is some cavities and the finished product has not yet completely solidified, you should consider 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 view 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 to impair the performance of the finished product. And when the mold is heated, the screw advance time also needs to be lengthened in order to compact the finished product.
6. Reasonably adjust to reduce the total processing cycle.
7. Run the newly adjusted conditions for at least 30 minutes until they are stable. At least a dozen full-model samples are then continuously produced, marked with dates and quantities on their containers, and placed on the mold cavity in order to test the stability of their operation. And derive reasonable control tolerances. (Especially valuable for multi-hole molds).
8. Measure and record the important size of the continuous sample (amount to wait until the sample cools to room temperature).
9. Compare the size of each mold 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 cavities that are continuous or large or smaller than average to check if the dimensions of the mold are correct.
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