What Are Continuous Operations?

A continuous operation furnace is a heat treatment furnace that continuously or intermittently charges, and the workpiece moves continuously in the furnace to complete heating, heat preservation, and sometimes cooling.

The continuous operation furnace can be continuously or intermittently charged and discharged by means of certain mechanical mechanisms, and the heating process can be continuously performed in different temperature zones according to the requirements of the part processing process. The use of continuous operation furnaces can improve product quality, labor productivity and labor conditions. ^[1]

advantage:

The production of such furnaces is carried out continuously, with the advantages of high production efficiency, stable product quality, energy saving, low production costs, easy realization of mechanization and automation, and suitability for mass production.

Disadvantages:

The large one-time investment makes it difficult to change the process. According to process requirements, the furnace is often divided into heating zone, heat preservation zone and cooling zone, each zone is equipped with different power, and is divided into power supply and temperature control.

Commonly used continuous operation furnaces include: conveyor belt furnaces, mesh belt furnaces, pusher furnaces, cut-bottom furnaces, rotary hearth furnaces, and roller furnaces.

Continuous operation furnace pusher furnace

Pusher furnace is a kind of continuous operation furnace which is widely used. It uses the pushing mechanism to intermittently push the workpiece (the workpiece is often mounted on the tray) from the end of the straight-through furnace into the furnace. roll out. The furnace has a simple structure and is easy to manufacture, and can be used for various heat treatment processes of large, medium and small workpieces. However, the tray consumes a large amount of heat, and the tray takes away more heat.

Continuous operation furnace vibrating bottom continuous furnace

Vibrating bottom continuous furnaces include pneumatic, mechanical and electromagnetic vibrating bottom furnaces according to the vibration mode.

1. Preparatory work procedures before production

1) Check whether the power supply, control cabinet and meters can work normally.

2) Check whether there are any objects that may be conductive in the furnace.

3) Check whether the circulation pump of the quenching tank runs normally.

4) Check if the conveyor runs normally.

5) Check whether the air compressor and its pipeline, and the pneumatic components are normal.

2. Operating procedures for heating

1) Turn the pointer of the meter to the temperature specified in the process, and turn the handle to the automatic control position.

2) The heating process uses the quenching medium to horizontally seal the blanking opening of the furnace to prevent cold air from entering the furnace.

3) When the furnace temperature reaches 600 ~ 700 , the start time relay makes the furnace bottom vibrate at the frequency of 2 ~ 3 times / min. At this time, the compressed air should be kept at 0.15 0.20MPa to prevent the furnace floor from getting stuck during the heating process.

4) Keep the instrument for 1 ~ 2h after the temperature is reached. ^[2]