The main steps of trial mode:

Because degraded rubber and miscellaneous materials may clog the mold, to prevent degraded rubber or miscellaneous materials from being injected into the mold, thoroughly clean the barrel, find the optimum temperature and pressure conditions, and develop a standard mold testing procedure.

Check whether the temperature of the barrel and the mold is suitable for processing the raw materials, adjust the pressure and injection volume, because the filling rate does not change much, it may cause the filling volume to change. When the mold is advanced by the screw when heated, the time should be appropriately extended to compact finished product.

Reasonable adjustment to reduce the total processing cycle. After successful debugging, a reasonable control tolerance can be obtained. When comparing the measured dimensions of each sample, it is necessary to pay attention to whether the size of the product is stable, and whether some dimensions have a tendency to increase or decrease. It indicates that the processing conditions are still changing, such as poor temperature control or poor oil pressure control, and whether the dimensional change is within the tolerance range.

During the mold test, care should be taken to make the processing run for a longer time to stabilize the melt temperature and hydraulic oil temperature. If the shrinkage is too large and the finished product looks insufficient, you can also refer to increasing the gate size, according to all the finished products are too large or Too small size adjust machine condition.

If the cavity size is still correct, try to change the machine conditions, if the cavity size is too large or too small, please correct, such as mold fill rate, mold temperature and various pressures, and check if some cavities fill slowly, check and correct Malfunctions in injection machines, such as defects in oil pumps, oil valves, thermostats, etc., can cause changes in processing conditions, and even a perfect mold cannot perform well in a poorly maintained machine.

Properly keep all records of sample inspection during mold tryout and retain all data that will help to successfully establish the same processing conditions in the future, resulting in a product that meets quality standards. At present, factory test molds often ignore mold temperature, but it is the most difficult to master mold temperature in short-term mold test and mass production in the future. Incorrect mold temperature will affect the size, shrinkage, luminosity, flow pattern and lack of material of the sample.