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2019-01-03 Operation Management of Melt Pump
1. Daily maintenance (l) Disintegration and cleaning of melt pumps , heating and cooling, starting and stopping should be strictly operated in accordance with regulations to avoid undue losses. (2) Attention should be paid to keeping the population pressure of the booster melt pump stable, so that it has a stable volume efficiency, so as to facilitate the operation of the pump itself and the stability of the spinning quality downstream. (3) When the population is negative pressure, the filling chamber pressure should be kept higher than the external atmospheric pressure. When the back pressure
2018-12-20 Material Particle Problem in Melt Pump
1. The problem of holes at both ends of particles. There are holes at both ends: indicating that the material contains more low molecular weight substances, and the vacuum exhaust has not cleaned the material contains more low molecular weight water withdrawal ingredients. Only one end has a hole: the low molecular weight substance contained in the material has less water retention and can be accepted without strict requirements. Solutions: pretreatment (drying, sealing, etc.); strengthening vacuum exhaust (taking into account screw design); increasing the temperature of water tank. 2. Particl
2018-12-12 Specific measures to solve side wall wear of melt pump
The volume loss of the melt pump is inevitable in the process of transportation, which mainly includes: (1) leakage of the axial clearance (that is, the end clearance of the gear). (2) Leakage of radial clearance. (3) Leakage of gear meshing point. (4) Elastic loss in liquid compression. The axial clearance of the melt pump refers to the clearance between the end face of the gear and the side plate or the end face of the bearing. The melt leaking through this clearance flows into the bearing chamber and returns to the inlet side. Because there are many ways of axial clearance and the length of
2018-11-29 Solution for wearing out valve seat of metering pump
Batte metering pump manufacturer for wear reason analysis: Through analysis, we believe that the problem is that the material of the valve ball seat does not match. The main material of the valve ball is ceramics, which has very strong hardness but no elasticity; while the material of the valve seat is 35CrMoA, which has great hardness and elasticity. In the process of operation, the repeated impact between the valve ball and the valve seat causes the contact surface between the valve seat and the valve ball to wear very fast, and the inner space gradually worn out, and finally was broken down
2018-11-17 Classification of seals for melt metering pumps
Melt metering pump is a kind of positive displacement conveying device, which conveys the flow of melt in direct proportion to the speed of the pump. The melt metering pump provided by Bart is mainly suitable for accurate measurement of melt in granulation, film, pipe and other fields, and its metering accuracy does not exceed (+1%). According to the classification of common sealing forms of melt metering pumps, Bart manufacturers will analyze and interpret for you in detail below. 1. Axial end-face mechanical seal: This seal has the advantages of simple structure, but it is easy to superheat
2018-11-07 Three sealing types of melt metering pump
Mechanical seals, packing seals and spiral seals are the most common seals for melt metering pumps . However, because of the high melt temperature, the deformation of springs and tine rings and the presence of impurities in the melt, mechanical seals have short service life, generally about half a year, and high cost. The packing seal is fast due to the wear of the packing and the axle sleeve, and it needs constant pressure packing. Therefore, mechanical seals and packing seals will result in increased maintenance workload and frequent replacement. Because polymer processing is generally conti
2018-10-29 Use of melt pump for recycling waste plastics
However, on the one hand, plastic recycling costs a lot of manpower and material resources, on the other hand, the recycling channels are still blocked, and the value of recycling is suppressed. So for a long time, waste plastics recycling is advocating on one side, but on the other hand, it can not avoid the waste of business. Of course, this is before, now the waste plastics recycling and recycling industry has been refreshed. First of all, countries all over the world, including China, are investing in human, material and financial resources, innovating key technologies, optimizing manageme
2018-10-18 Relationship between extruder extrusion and melt pump speed
The pumping method of the melt pump belongs to the quantitative pumping mode, which is the same as that of the piston pump. The material clamped between the inner wall of the pump and the clearance between the gear teeth is sent to the outlet side as the gear rotates continuously. However, the piston pump can not be used for high viscosity materials pumping, because it will produce the same as the screw yaw turbulent pulsation. Therefore, if we want to improve the extruders performance, we should configure the melt pump . The characteristic of the forward displacement most melt pump is that th
2018-09-30 Melt metering pump routine maintenance
1. During the production and operation of the melt metering pump , the power and torque of the metering pump should be measured periodically, and the abnormal position should be stopped to check its alignment accuracy or adjust the lubrication condition of the coupling. 2. When the components can not be replaced in time due to production reasons and are overused, the power and torque of the metering pump should be measured frequently to avoid the phenomenon of overloading operation device. 3. When the melt temperature is lowered, the control power and torque of the metering pump will increase
2018-09-19 Importance of sealing of melt pumps in PET plant
Melt pump is an important equipment in polyester plant. The seal of melt pump is mostly made of mechanical seal into packing seal. Because of high melt temperature, easy deformation of spring and tincture rings and the presence of impurities in the melt, mechanical seals have a short life of about half a year and high cost. The packing seal is fast worn due to the wear of the packing and the axle sleeve, and it needs constant pressure packing. Therefore, both mechanical seal and packing seal will increase the maintenance workload and change frequently. Dry polyester production is a continuous
