When rubber injection molding machine in production, use good mobility plastic nozzle prone plastic salivation, drooling is not only a waste of such material will also affect the quality of products, even interrupting production. To solve the problem of plastic salivation, existing common solution is to use the first three self-locking spring nozzle; the second is the use of a hydraulic control device to control the nozzle switch; the third is to reduce the nozzle aperture . For the first solution, since the spring lock nozzle has the advantage of cheap and widely used, but due to the large pressure loss, when converting liquidity fair or poor materials to replace the nozzle, while the spring at high temperatures prone to failure, it is generally a year and would replace a nozzle, and the current domestic spring up on the performance is not to IJ, often imported, high maintenance costs. For the second solution, using the hydraulic control device to control the nozzle switch is better, but the cost is too high and must install the appropriate software to control the rubber injection molding machine and therefore not widely used. For the third solution, reducing the nozzle aperture prone to gag, but rubber injection molding machine is difficult to completely prevent salivation, different injection materials still need to replace the corresponding nozzle.
A cycle workflow, load changes cause relatively large changes in system pressure, but the pump is still 50Hz operation, the fuel supply is constant, excess hydraulic oil through the relief valve back into the tank, to do useful work for nothing wasted energy. Frequency control of the pump, the pump was changed to similar quantitative variable pump characteristics. When the system needs a high pressure pump motor 50Hz operation, the required pressure is small, reduced frequency inverter operation. And the pump shaft power is proportional to the product of outlet pressure and flow rate of the motor output, after the pump motor speed decreases, the output shaft power is reduced, it is possible to achieve effective energy-saving, energy-saving rate is generally 20% to 50%.
bakelite chemistry injection molding machine
Alina
