The connection, installation, and inspection of high-pressure extruders are key steps to ensure safe equipment operation and experimental accuracy. The following are detailed precautions:

1、 Preparation before installation of high-pressure extruder

1. Environmental inspection

Ensure that the installation environment is dry and ventilated, and avoid damage to the equipment caused by moisture or corrosive gases such as acid mist, ammonia, etc.

The workbench should be stable and sturdy, able to withstand the weight of the equipment and the vibrations during operation.

2. Equipment inspection

Check if all components of the extruder are intact, without cracks, deformation, or wear.

Confirm that the seals (such as O-rings and gaskets) are not aging or damaged, otherwise they need to be replaced.

Clean up internal residues to ensure smooth flow channels.

3. Tool preparation

Prepare specialized tools such as torque wrenches, vernier calipers, and sealing testing tools (such as pressure gauges and leak detectors).

If high temperature or high pressure operation is required, safety equipment such as protective gloves and goggles should be prepared.

2、 Precautions for Connection and Installation of High Pressure Extruder

1. Mechanical connection

Flange or threaded connection:

The flange bolts should be tightened evenly in diagonal order to avoid leakage caused by uneven stress.

The threaded interface needs to be wrapped with raw material tape or coated with sealant to ensure sealing.

Docking of mold head and cylinder:

The contact surface between the mold head and the cylinder body should be cleaned and coated with high-temperature lubricating grease or sealant.

Use a torque wrench to tighten to the specified torque to prevent deformation of the parts due to over tightening.

2. Electrical and Control Systems

Wiring must comply with equipment labeling to avoid reverse polarity or signal line interference.

Check if the connections of temperature control, pressure sensors, and other components are secure to avoid signal errors caused by looseness.

3. Hydraulic or pneumatic systems

Hydraulic oil pipes or air pipes should be free from bending or damage, and the joints should be fixed with hose clamps or specialized clamps.

Before debugging, it is necessary to eliminate the air inside the system to prevent pressure fluctuations or air blockages.

3、 Sealing inspection

1. Low voltage leakage test

Close all outlet valves and introduce low-pressure gas (such as nitrogen or compressed air) into the system.

Apply soapy water or leak detector to the flange, thread, and other connections, and observe for the formation of bubbles.

2. High pressure test

Gradually increase the pressure to 1.1-1.5 times the working pressure, hold for 10-15 minutes, and check if the pressure is released.

It is strictly prohibited to directly raise to high voltage to avoid equipment damage or safety accidents.

3. Long term operation testing

Run continuously for 2-4 hours, monitor whether the pressure, temperature and other parameters are stable, and ensure that there are no leaks or blockages.

4、 Function inspection and debugging of high-pressure extruder

1. Heating system

Check if the heating element is heating up normally, and the error between the set value and the actual value of the temperature controller should be ≤± 2 ℃.

Avoid local overheating, prevent material degradation or equipment damage.

2. Pressure system

Adjust the pressure valve to verify the accuracy of the pressure display, and control the pressure fluctuation range within ± 5%.

Check if the safety valve opens and closes normally under the set pressure.

3. Screw and transmission system

Manually rotate and check if the screw is flexible, without any jamming or abnormal noise.

After starting the motor, observe whether the screw direction is correct and whether the speed is stable.

4. Mold head discharge test

Low temperature and low-speed feeding test, observe whether the discharge is uniform and whether the mold holes are blocked.

Adjust the screw speed and pressure to verify the adaptability of process parameters.