1, the workpiece into the vacuum box is to extract the vacuum in the workpiece material can be removed from the gas composition. If you first heat the workpiece, the gas will swell in case of heat. Due to the tightness of the vacuum box is very good, the expansion of the gas produced by the enormous pressure may make the observation window tempered glass burst. This is a potential danger. According to the first vacuum and then heating the heating process, you can avoid this danger. In the case of
2, if the first temperature heating and then vacuum the program operation, the heating air is pumped out when the vacuum pump, the heat will inevitably be brought to the vacuum pump up, resulting in vacuum pump temperature rise is too high, it may make the vacuum pump efficiency. In the case of
3, the heated gas is directed to the vacuum pressure gauge, vacuum pressure gauge will produce temperature rise. If the temperature rise exceeds the vacuum pressure gauge specified in the use of temperature range, it may cause the vacuum gauge to produce the indication error. In the case of
4, the correct use of the method should first vacuum and then heating. To be reached after the rated temperature, such as the vacuum found to be reduced when the appropriate pumping about. This is advantageous for extending the service life of the equipment.