Can it be extruded with an extruder when there is a large amount of water in the raw material?

First of all, extruder extrusion is to melt the raw materials through heating and shearing, etc., and extrude them in the form of melt after being fully mixed and evenly mixed.

Whether the raw material has a large water content and can be extruded by an extruder depends on the following aspects:

Whether the raw materials used are affected by water vapor, such as PET, PA and other materials, will be hydrolyzed when encountering water vapor at high temperatures, this material has very high requirements for water vapor content, although there are natural exhaust, vacuum exhaust and other means to discharge water vapor, but when the water vapor is generated, the material will be degraded, and the exhaust can not completely discharge the water vapor, so this material can not be extruded with an extruder in the case of more water content.

If it is just ordinary resin, such as PE, PP, etc., an extruder can be used if the additives and fillers used do not react with water.

2.The process of feeding.

If the water content in the raw material is more, a large amount of water vapor will be released when heated into the extruder, and it will be poured back into the feeding port into the atmosphere.

In this case, it is best to use side feeding, and open the exhaust port in the section of the cylinder in front of the feeding port, so that the water vapor will not affect the feeding when it runs backwards.

3.The material used in the machining section.

Ordinary steel is easy to corrode under high temperature and high humidity, which affects the life of the equipment, so it is necessary to choose suitable materials or accept short-term corrosion of the equipment.

The main task of the extruder is to process the material, provide the melt, and treat the water vapor is not what the extruder should do, so if the conditions permit, the material should be dried first and then fed into the extruder, so that the product quality, formula stability, and output will be more effective.

Absolutely, the natural exhaust port of the extruder, the vacuum exhaust port are designed for this.

1. The volumetric efficiency decreases to a certain extent, the compressor gas transmission coefficient is 0, and the compressor can hardly inhale refrigerant vapor, thus losing the refrigeration energy experience. 2. The actual compression process deviates from the quotient degree to increase, so that the actual power consumption of the refrigeration compressor increases, the efficiency decreases, and the refrigeration coefficient decreases. 3. It will inevitably lead to an increase in the exhaust temperature of the refrigeration compressor, and Nian Ying even exceeds the limit of the allowable exhaust temperature of the compressor.

At the same time, the exhaust temperature is too high and will also affect the normal operation of the refrigeration cycle 4, generally according to the pressure ratio of the compressor n 8, the pressure ratio of the single piston refrigeration compressor of freon refrigerant is n 10, and the pressure ratio that can be achieved by using the centrifugal refrigeration compressor per limb is n 4

Summary. 1.Inspect the heater and replace it if necessary; 2.Verify the set temperature of each section, and negotiate with the technician if necessary to increase the temperature set value; 3.Clean and inspect the extrusion system and machine head.

The extruder die head produces large outer diameter and uneven discharge, and small outer diameter discharges uniformly.

1. A certain section of the heater does not work, and the material is not plasticized; 2.The operating temperature setting is low; 3.There may be foreign objects that do not melt easily;

1.Inspect the heater and replace it if necessary; 2.Verify the set temperature of each section, and negotiate with the technician if necessary to increase the temperature set value; 3.Clean and inspect the extrusion system and machine head.

But the outer diameter is small, and the extrusion is small.

The small outer diameter is easier to mold, and the temperature is relatively concentrated.

The outer diameter is large, and the temperature control requirements are higher.

It can also be caused by uneven extrusion pressure.

The large outer diameter requires higher temperature and pressure.

But it's time again.

The outer diameter is small, the pressure and temperature requirements are slightly lower.

So it could be a problem with the heater.

I have to find a maintenance after-sales personnel to disassemble it.

I'll let it be measured with a mercury thermometer.

This mercury is still goodbye.

The mercury thermometer is not accurate, and there is an upper limit on the degree.

There is that kind of industrial use, 300

When the time comes, the discharge port inside will be dismantled, and everything will be cleaned up.

It is also possible that something else went in, and it was blocked, and the large diameter was uneven.

The pressure of the trail is the same as that of the larger trail, so it will be squeezed a little more evenly.

Equipment: Enlarged model.

The rotational speed, motor power, and corresponding parts (feeding capacity, gearbox, screw torque can be withstanding, number of die holes, sink cooling capacity, pelletizer output, feeding system output, baling system capacity) and other increases.

Above, if the output needs to be tripled, in fact, the corresponding equipment of the entire line needs to be re-purchased, and the capital is not small.

Process: In the case of satisfying the performance parameters, the temperature should be increased as much as possible, so that the fluidity will increase, the viscosity will be reduced, and the output can be increased, but it cannot be increased by two times, at most 2 to 3 percent.