Common faults and solutions of pressure sintering furnace

07-09-2025       Author: KJ technology

Common faults and solutions of pressure sintering furnace

1. Abnormal temperature control

Insufficient temperature rise

Reason: The power supply is not connected properly, the heating element is damaged, the temperature setting is incorrect, or the PID parameters are unreasonable.

resolvent:

Check the power lines and switches to ensure normal power supply.

Use a multimeter to measure the resistance of the heating element, determine if there is an open or short circuit, and replace it if necessary.

Re calibrate the temperature sensor to ensure accurate temperature setting.

Adjust PID parameters based on material properties to optimize temperature control accuracy.

Temperature too high or out of control

Reason: Temperature control system malfunction, continuous heating of heating elements, sensor calibration error.

resolvent:

Check the temperature setting value to avoid overheating operation.

Check the heating element control circuit and repair signal interference or component damage issues.

Regularly calibrate thermocouples to ensure measurement accuracy.

2. Pressure system malfunction

Insufficient or unstable pressure

Reason: hydraulic system leakage, oil pump failure, poor cylinder sealing; Or insufficient air supply pressure in the pneumatic system, gas pipeline leakage, and worn piston rings.

resolvent:

Hydraulic system: Check the hydraulic oil level and repair leakage points; Repair or replace the oil pump; Replace the oil cylinder seal.

Pneumatic system: supplement gas source pressure, repair gas pipeline leaks; Replace worn piston rings.

Uneven pressure

Reason: The contact surface between the indenter and the mold is not parallel, and there is a deviation in the installation of the mold.

resolvent:

Check the flatness and parallelism of the indenter, and if necessary, grind and repair it.

Ensure that the mold is installed correctly and the center lines of the upper and lower molds are aligned.

3. Vacuum degree issue

vacuum loss

Reason: Poor sealing of the furnace body (such as aging sealing rings, loose pipeline connections), vacuum pump failure, and blockage of vacuum system pipelines.

resolvent:

Check the sealing rings at the furnace door, observation window, and pipeline connections, and replace aging or damaged parts.

Check the oil level and quality of the vacuum pump, and add or replace the vacuum pump oil if necessary.

Clean the impurities in the vacuum system pipeline to ensure smooth flow.

Abnormal operation of vacuum pump

Reason: pump oil contamination, insufficient oil level, valve leakage.

resolvent:

Clean the vacuum pump and replace it with new oil.

Check the vacuum pump valve and repair any air leaks.

4. Equipment leakage and sealing issues

Furnace body leakage

Reason: Aging of seals, damage to furnace shell, poor welding.

resolvent:

Replace the aging seals and reinstall to ensure good sealing.

Repair or replace the damaged parts of the furnace shell.

Repair welding treatment shall be carried out on the welding defects.

Abnormal gas filling

Reason: Blockage of gas pipeline, malfunction of solenoid valve, abnormal operation of gas inflation valve.

resolvent:

Check the gas pipeline and clean any blockages.

Check the solenoid valve and gas inflation valve, repair or replace faulty components.

5. Electrical and control system malfunction

Control system malfunction

Reason: Power failure, loose wiring, incorrect program or parameter settings.

resolvent:

Check the power supply circuit and switch of the control system to ensure normal power supply.

Check if the wiring is loose or burnt, reconnect or replace the wiring.

Reset the programs and parameters of the control system to ensure correct operation.

Display screen abnormality or button malfunction

Reason: Control system software vulnerability, circuit component damage.

resolvent:

Update control system software and fix vulnerabilities.

Check the control circuit, repair or replace damaged circuit components.

6. Other common questions

Poor or uneven sintering of samples

Reason: Unreasonable sample preparation (such as improper powder particle size and composition ratio), inappropriate sintering temperature or time, abnormal ventilation or atmosphere control.

resolvent:

Optimize the sample preparation process to ensure uniform powder particles and appropriate composition ratios.

Adjust the sintering temperature and time to ensure sufficient sintering.

Check the ventilation and atmosphere control system to ensure normal operation.

Equipment cooling system malfunction

Reason: Abnormal cooling water circulation, blocked radiator, and deteriorated coolant.

resolvent:

Check the cooling water supply to ensure that the water pump and pipes are not blocked or leaking.

Clean the dust and impurities on the radiator to ensure good heat dissipation.

Regularly replace the coolant to ensure effective cooling.