(1) Check whether the plastic raw materials in the barrel are correct, and whether they are baked according to the regulations (if different raw materials are used for mold testing and production, different results may be obtained).
(2) The cleaning of the material tube must be thorough to prevent inferior rubber or miscellaneous materials from being injected into the mold, because inferior rubber and miscellaneous materials may jam the mold. Check whether the temperature of the barrel and the temperature of the mold are suitable for processing raw materials.
(3) Adjust the pressure and injection volume in order to produce a finished product with a satisfactory appearance, but do not run rough edges, especially when there are still some mold cavity products that have not been completely solidified, you should think about it before adjusting various control conditions, because A slight change in the filling rate may cause a large change in the filling.
(4) Wait patiently until the conditions of the machine and mold stabilize, even for medium-sized machines, it may take more than 30 minutes. Use this time to review possible issues with the finished product.
(5) The advancing time of the screw should not be shorter than the solidification time of the plastic at the gate, otherwise the weight of the finished product will be reduced and the performance of the finished product will be damaged, and when the mold is heated, the advancing time of the screw should also be extended appropriately to compact the finished product.
(6) Reasonably reduce the total processing cycle.
(7) Operate the newly transferred conditions for at least 30 minutes to stabilize, and then continuously produce at least a dozen full-mould samples, mark the date and quantity on the container, and place them separately according to the mold cavity, so as to test the stability of its operation and Derive reasonable control tolerances (especially valuable for multi-cavity molds).
(8) Measure and record the important dimensions of continuous samples (should be measured when the samples are cooled to room temperature).
(9) To compare the dimensions measured by each mold sample, it should be noted that:
①Whether the product size is stable;
②Whether certain dimensions have a tendency to increase or decrease, indicating that the machining conditions of the machine are still changing, such as poor temperature control or oil pressure control;
③Whether the size change is within the tolerance range.
(10) If the size of the finished product does not change much and the processing conditions are normal, it is necessary to observe whether the quality of the finished product of each cavity is acceptable and whether the size is within the allowable tolerance. Record the number of cavities that are continuous or larger or smaller than the average value, so as to check whether the size of the mold is correct.
