Views: 0 Author: Mark Zhai Publish Time: 2023-05-27 Origin: original
The performance of the hot press plate can be evaluated from several aspects, firstly, the use of the press plate material, then the processing precision, and finally the layout of the medium channels in the hot press plate. The hot-pressed plate is generally made of a whole piece of pressed steel plate through deep hole drilling, and is mainly used for oil heating and steam heating; the other is the form of aluminum plate attached to the surface of the welded pipeline, which is mainly used for electric heating. Using the whole steel plate can avoid oil leakage caused by poor sealing.
At the same time, the rigidity and strength are high, but the hot-pressed plate is relatively thick; the latter is usually in the form of a thin plate, and due to stress generated during welding and processing, high processing accuracy is required. The hot-pressed plate is thin and easy to preheat and control the temperature, but it has high requirements for the workpiece.
The uneven thickness of the workpiece will cause the deformation of the platen and affect the quality of subsequent processing; the thicker hot-pressed plate is beneficial to increase the heat capacity and improve the strength and rigidity. But it will increase the size of the press and consume more steel.
During manufacturing and processing, it should be ensured that the flatness of the hot pressing plate and the upper and lower surfaces have sufficient parallelism.
The flatness tolerance of the hot pressing plate should be within the range of 0.1-0.18mm, and the tolerance of parallelism should be within the range of 0.15-027mm. The roughness is 3.2 μm.
The temperature difference should not exceed 2-3°C in the entire width of the hot pressing plate.
If the temperature difference is too large, the moisture content will be uneven, the product will warp easily, and the strength and appearance quality of the product will be affected. The heating channel through which the heat medium flows in the heat press plate is generally not paid attention to by people in the furniture industry.
The correct circuit design should be based on the principle of facilitating the flow of heat medium, facilitating the uniform temperature rise of the plate surface, and reducing the leakage of heat medium. For the small press hot plate used in the furniture industry, the design of single channel and double circuit is generally adopted, which can meet the requirements of use.
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