The five why analysis screw vacuum pump wear _

screw vacuum pump by the screw and barrel to inhalation and discharged liquid seal chamber volume change. In the process of application, would inevitably damage problems, below the screw vacuum pump equipment damage are introduced in details.

a, if there is one on the enamel material filling masterbatch ( Such as calcium phosphate or glass fiber) , it will accelerate the screw and barrel of the damage.

2, screw vacuum pump temperature category

1, each of them usually have ideal melting production and processing temperature category, and the production and processing temperature should be controlled cylinder to make it close to the temperature range.

3, in the narrow and homogeneous area, if the plastic melt is irregular, the damage will be increased.

2, granulated plastics from mixing barrel into the barrel, and then the first to arrive at feeding area. Incoming parts will be dry friction. When plastic heating is not sufficient, the uneven cylinder will easily lead to the barrel cavity. And the screw surface damage increased.

three, screw vacuum pump speed ratio should be correctly calibrated:

1, because some plastic reinforcer is added, such as glass, minerals or other filler masterbatch. This chemical on the stainless steel friction is often much larger than the molten plastic.

2, in plastic injection molding, if you use high speed ratios increase plastic shear stress, still can make relatively large number of plant fiber fracture, also torn plant fiber. The sharp tail, make the damage is greatly increased.

3, when the stainless steel passivation and idling, inorganic mineral has a great influence on the scraping. Therefore, faster than not suitable emphasized too much.

4, screw vacuum pump in the screw rotation in the barrel, and the friction material, both screw and barrel of the surface of the work went slowly damage:

1, thread became smaller, the barrel inside screw increases gradually. So, screw and cylinder through the gap with each other, with both slow damage increased.

2, because the front cylinder pump it machine and the frictional resistance of diaphragm has not changed, so that increased the total leakage flow flame retardant plastic enamel materials, namely protect the material from the linear space of the flow direction of feed.

3, the result is the production of plastic machinery, and increase the waiting time of tantalum material in the cylinder, lead to tantalum material decomposition. If it is PE, decomposition of hydrogen chloride experience to increase the screw and barrel of the corrosion.

5, because not melting crucible materials and asymmetric, or in the dirt to infiltrate the material of metal material, so the rotation of the screw torque increases suddenly. This more than the limit, the strength of the screw torque screw fracture. This is unusual safety accident damage of screw vacuum pump.

screw vacuum pump features of natural attraction, low noise, high efficiency, long life, the characteristics of reliable operation. Although not immediately to prevent and maintain a good equipment, but still can't solve the problem, because can cause serious damage. An immediate solution is harm to the application of mechanical equipment.