Method of reducing hydraulic system power of multi layer hot press and practical appts

Abstract

A method for decreasing the power of hydraulic system for multi-layer hydraulic press used to produce raw boards features that the hydraulic oil source for board loading and unloading machines is introduced to the closing and pressing procedures of hot press, resulting in high closing and pressing speed, low capacity of hydraulic system, and low energy consumption.

Description

technical field [0001] The invention relates to a hydraulic mechanism and a working method of a multi-layer hot press used in a production line of wood-based panels (mainly referring to medium-density fiberboards and particleboards with relatively large compression strokes). Background technique [0002] In the prior art, the pressure oil source of the loading machine and unloading machine on the wood-based panel production line is configured separately from the closing and pressurized oil source of the hot press, because when the loading machine or the unloading machine does not rise , the oil source of the loading machine and the unloading machine pump is in an unloaded state, and a large amount of flow flows back to the oil tank through the reversing valve, causing the hydraulic system to heat up, which will not only cause energy waste, but also increase the use cost of the hydraulic system, so The power of the hydraulic system of the multi-layer hot press is usually very...

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Problems solved by technology

[0002] In the prior art, the pressure oil source of the loading machine and unloading machine on the wood-based panel production line is configured separately from the closing and pressurized oil source of the hot press, because when the loading machine or the unloading machine does not rise , the oil source of the loading machine and the unloading machine pump is in an unloaded state, and a large amount of flow flows back to the oil tank through the reversing valve, causing the hydraulic system to heat up, which will not only cause energy waste, but also increase the use cost of the hydraulic system, so The power of the hydraulic system of the multi-layer heat press is usually very high. However, although the installed capacity of the hydraulic system of the multi-layer heat press is sometimes as high as 700kW to 800kW, the closing and pressurization time of the heat press has not been significantly shortened.

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