Common faults and solutions of atmosphere vacuum sintering furnace

05-29-2025       Author: KJ technology

Various faults may occur during the use of atmosphere vacuum sintering furnace. The following are common faults and their solutions:

Insufficient vacuum degree:

Possible reasons: Vacuum pump malfunction or performance degradation, vacuum pipeline leakage, aging or damaged seals, residual gas or pollutants in the furnace body or pipeline.

Solution: Check the working status of the vacuum pump and repair or replace it if necessary; Check the connection parts of the vacuum pipeline to ensure no leaks, use a leak detector to locate and repair the leakage points; Thoroughly clean and degas the furnace body and pipelines to remove residual gases and pollutants.

Uneven heating:

Possible reasons: damage or aging of heating elements, malfunction or incorrect positioning of temperature sensors, damage or improper arrangement of heat shields.

Solution: Check and replace damaged or aged heating elements; Check the working status of the temperature sensor, ensure its correct position and normal function, and calibrate or replace it if necessary; Check the status of the heat shield, repair or rearrange it to ensure uniform heat distribution.

Temperature control malfunction:

Possible reasons: Temperature controller malfunction, temperature sensor malfunction, control circuit malfunction.

Solution: Check the working status of the thermostat and calibrate or replace it if necessary; Check the temperature sensor to ensure that it is connected correctly and functioning properly, and replace the sensor if necessary; Check the control circuit, repair or replace faulty components.

Internal pollution of furnace body:

Possible reasons: Unclean residues during use, material evaporation or reaction by-products, poor sealing of the furnace body leading to external pollutants entering.

Solution: Regularly clean the interior of the furnace to remove any residue; Use appropriate materials to avoid the generation of volatility or reaction by-products at high temperatures; Ensure good sealing of the furnace body to prevent external pollutants from entering.

Abnormal noise of vacuum pump:

Possible reasons: Internal wear or damage of the vacuum pump, insufficient or contaminated lubricating oil, foreign objects entering the interior of the vacuum pump.

Solution: Check the condition of the internal components of the vacuum pump and repair or replace them if necessary; Check and clean the foreign objects inside the vacuum pump to ensure that there are no foreign objects obstructing the normal operation of the pump.

The furnace door cannot be opened or closed normally:

Possible reasons: Aging or damage of the furnace door sealing ring, mismatch between the furnace door sealing ring and the furnace body.

Solution: Replace the aging or damaged furnace door sealing ring; Check and repair the mechanical components of the furnace door to ensure its normal operation; Ensure that the sealing ring of the furnace door matches well with the furnace body, and adjust it if necessary.

Heating does not stop:

Possible cause: Poor contact or burnout of the heating time relay.

Solution: Adjust the contact between the time relay and the socket or replace it.

Gas supply failure:

Possible reasons: gas pipeline blockage, malfunction of solenoid valve or gas inflation valve, gas inflation piping leakage.

Solution: Check if the gas pipeline is blocked; Check the operation of the solenoid valve and gas inflation valve; Confirm if there is any leakage in the gas inflation piping, and repair it promptly if there is any leakage.