How to use infrared die heating oven for aluminum profile extrusion?

1,Check before startup for infrared die heating oven:

Check the main power supply, gas source, and normal operation of the furnace door cylinder; Reset the emergency stop button.

The interior of the furnace is clean and free of aluminum shavings and debris; The infrared heating tube and reflector are intact and undamaged.

Confirm the position of the infrared temperature probe, which cannot be obstructed by the mold.

Mold inspection for die heating oven: The surface of the mold is clean and free of aluminum slag; Assemble the mold sleeve and mold pad; The mold should not contain water or oil stains into the furnace to prevent smoking and damage to the heating components.

2,Complete operation steps for infrared die heating oven:

1) Install the mold into  infared die heating oven:

Click on 'Furnace Door Open' on the touch screen (pneumatic door opening) in die oven.

Use a crane to lift the mold into the furnace, and place the mold: do not tightly adhere to the furnace wall; Leave gaps in the middle of multiple sets of molds to ensure that infrared radiation is evenly applied to all surfaces and heated.

Click on 'Furnace Door Close' to confirm that the furnace door is completely closed (light leakage will cause significant heat loss) in die oven.

2) Set process parameters (HMI touch screen) for infrared heating oven:

Temperature reference (6063 aluminum profile)

Flat mold: 450-470 ℃ for die oven heating

Split mode: 460-480 ℃ for die oven heating

Temperature upper limit for complex thin-walled profiles; Lower limit for simple solid profiles.

Reference for insulation time for infrared die heating oven:

Molds with diameter of less than 180: insulation for 2-3 hours

Large molds with a diameter of over 180: insulation for 3-4 hours

Pay attention for infrared die heating oven:

The total heating time of the mold in the furnace must not exceed 8-10 hours. 

If the time is too long, the mold will be annealed and the working zone will oxidize and damage the mold. If it is not installed on the machine, it should be lifted out and cooled. It will be re polished and reheated next time.

Operating touch screen in infrared heating oven:

Enter the temperature setting page and enter the target temperature; 

Activate the over temperature alarm.

Turn on the 'Heating Start' button to initiate infrared radiation heating of the device.

Observation: Actual temperature ≠ furnace air temperature, infrared temperature measurement is used to measure the temperature of the mold body. Start timing and insulation after reaching the set temperature.

3) Insulation completed for infrared heating oven, take the extruder from the mold:

When the insulation time is up, the equipment will sound an alarm prompt.

Click on 'Furnace Door Open', lift the high-temperature mold with a crane, and immediately transfer it to the extruder.

The opening time of the furnace door should be as short as possible to reduce heat loss.

You can immediately put in the next set of molds to be heated, close the furnace door and continue heating.

4) Shutdown steps after work in infrared heating oven:

Stop heating output and do not immediately cut off the main power supply.

Let the furnace cool down naturally, wait until the furnace temperature drops below 200 ℃, and then turn off the main power and gas source.

Clean the furnace aluminum shavings; Check the infrared heating tube and reflector cover.

Fill in the equipment operation record.

3, Key considerations (specific to infrared mold furnaces) for infrared heating oven:

Heat transfer characteristics: relying on infrared radiation, not hot air. Do not stack molds to block each other, as blocking will result in slow heating and uneven temperature.

The mold is strictly prohibited from bringing water or oil into the furnace, as it may cause the heating tube to explode and produce a large amount of smoke.

During operation, do not open the furnace door for a long time as it will reduce the lifespan of the infrared heating tube.

Safety for infrared heating oven: Wear high temperature protection for hanging molds; When the furnace door is open, no one is allowed to stand in front of the furnace mouth to prevent burns from high temperatures and heat waves.

Do not modify PID temperature control parameters arbitrarily. Non electricians are prohibited from modifying internal parameters of the touch screen.

The reflector plate needs to be regularly cleaned of aluminum dust. If it gets dirty, the infrared reflection will deteriorate and the heating efficiency will significantly decrease.

4,Simple diagnosis of common faults for infrared heating oven:

The temperature cannot be raised: check the furnace door seal, whether the heating tube is burnt out, and whether the reflection plate has accumulated too much dust.

Temperature display jumping: The infrared temperature probe is blocked by aluminum shavings, clean the probe.

Overtemperature alarm for infrared heating oven: Check the temperature control PID and ensure that the mold is placed too close to the heating element.

Pit type infrared die heating oven photo in customer factory:

Die heating oven is necessary oven for extrusion production line,die heating oven used for heating extrusion die before extrusion press