Maintenance and application of bearing pedestal
(1) Application of bearing pedestal cooling system. The cooling water of bearing pedestal not only extends the service life of bearing pedestal under the condition of accurate application, but also improves the manufacturing compliance. The material of bearing block is usually made of special bearing block steel through various measures. The best bearing block steel has its application limit, just like temperature. Under the application condition of bearing pedestal, if the mold temperature is too high, it is very easy to cause cracks on the surface of the mold core early. Some bearing pedestals even have cracks on a large area before the mold times exceed 2000. Even the mold core of the bearing block has changed color due to the high temperature of the bearing block in the manufacturing process. After measurement, it has reached more than 400 degrees. Under such a temperature, it is very easy to have cracks when encountering the cold condition of the release agent. The products manufactured are also easy to deform, strain, and stick to the mold. The application of mold release agent can be greatly reduced when the cooling water of bearing pedestal is applied, so that the operator will not use the mold release agent to reduce the temperature of bearing pedestal. Its advantages lie in extending the life of the bearing seat, saving the die casting cycle, improving the product quality, reducing the occurrence of die sticking, pulling and aluminum sticking, and reducing the application of release agent. It can also reduce the loss of ejector rod and core caused by overheating of bearing pedestal.
(2) For the cleaning of the parting surface of the bearing seat, the operator shall completely clean the parting surface of the bearing seat with kerosene, which can not only prevent the bearing seat from being squeezed, but also buy the exhaust slot blocked by the residue of the release agent or other dirt on the bearing seat after cleaning, which is beneficial to the discharge of the gas in the cavity during the injection process to improve the product quality.
(3) The bearing pedestal must be preheated during the manufacturing process of the bearing pedestal to prevent the occurrence of cracks caused by the sudden encounter of hot metal liquid in the cold bearing pedestal. For complex bearing pedestals, blowtorch and liquefied gas can be used; for good conditions, mold temperature machine can be used; for relatively simple bearing pedestals, slow injection preheating can be used.