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Artificial board hot-pressing fast constant-temperature control device and method

A constant temperature control and control device technology, which is applied in the direction of temperature control using electric methods, flat products, household components, etc., can solve problems such as difficult constant temperature control and slow temperature change, achieve rapid cooling, uniform temperature distribution, and shorten heating time Effect

Active Publication Date: 2013-10-09
文安县弘林木业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the application of organic heat carrier in the field of hot pressing of wood-based panels is mainly to circulate the heated hot oil to the hot pressing plate for hot pressing and bonding of the slabs. The hot pressing temperature control is the same as that of the steam hot pressing machine. The heating source and heat-using equipment are controlled by PLC, but the temperature changes slowly, making it difficult to quickly achieve constant temperature control
For the thick plate hot pressing process that needs to be heated in stages, requires small fluctuations in the temperature of heat preservation and pressure, and quickly cools to a certain temperature before unloading the plate, and the hot pressing process that needs to quickly reach the constant temperature and rapid cooling requirements, the above-mentioned current The temperature control device and control method of the steam hot press and the heat transfer oil hot press cannot meet their requirements, and the rapid constant temperature control device and control method need to be studied separately

Method used

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  • Artificial board hot-pressing fast constant-temperature control device and method
  • Artificial board hot-pressing fast constant-temperature control device and method
  • Artificial board hot-pressing fast constant-temperature control device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0017] like figure 1 , 2 As shown, according to the manufacturing and installation procedures of the wood-based panel hot-pressing rapid constant temperature control device, the control device in the heat carrier circulation pipeline system is manufactured and installed, and the control device is manufactured and installed according to the image 3 As shown, taking the hot pressing process corresponding to the typical three-stage depressurization and cooling curve suitable for three boards (plywood, particle board and medium density fiberboard) in wood-based panels as an example, the above-mentioned wood-based board hot-pressing rapid constant temperature control device and control are described in detail. method implementation. according to image 3 Set the hot-pressing process parameters as shown, turn on the power, and close the hot-pressing plate. according to Figure 4 Start hot oil pump b(2), valve V 1 , V 6 Fully open, the heater (4) is energized, and the heat tra...

Embodiment 2

[0019] According to Example 1, in the heat preservation and pressure maintenance process stage, in order to keep the temperature of the hot platen constant quickly, the valve V 1 , V 2 The opening change is detected by real-time temperature T B(i+1) The process setting value T B0(i+1) and its variation range T B0(i+1) ±ΔT B OK, ΔT B is the temperature fluctuation amplitude allowed by the process. When T B(i+1) B0(i+1) -ΔT B When the valve V 1 Open large, valve V 2 Turn down and continue to heat; when T B(i+1) >T B0(i+1) +ΔT B When the valve V 1 closed, the valve V 2 Open big; V 1 , V 2 The change value of the valve opening is the flow change value of the valve and the real-time measured temperature T B(i+1) with its process setting value T B0(i+1) The difference (T B(i+1) -T B0(i+1) Change according to PID rule. The temperature of the upper hot platen (16) is controlled by the control valve V 6 A change in valve opening that passes through the valve V 6 T...

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Abstract

The invention relates to an artificial board hot-pressing fast constant-temperature control device and method. The artificial board hot-pressing fast constant-temperature control device is composed of flow control valves, delivery pumps, heater control devices, a heat-conducting oil temperature control system, a hot-pressing plate temperature detection control system, a time programming controller and a control unit, wherein the flow control valves, the delivery pumps and the heater control devices are installed in a hot-cold heat-conducting oil delivery pipeline, a water delivery pipeline and a steam delivery pipeline respectively. According to the artificial board hot-pressing fast constant-temperature control method, a complicated mixed control system which is formed by connecting a main controller and an auxiliary controller which are arranged in each hot pressing plates and the heat-conducting oil temperature control system and the time programming controller in series is applied, the flow of heat carrier and a heating source device in each pipeline which delivers hot heat carrier or cold heat carrier is controlled, the temperature of heat-conducting oil and the temperature of the hot pressing plates are made to rapidly meet the expectant requirement, and the temperature control over an upper hot pressing plate and the temperature control over a lower hot pressing pate can be independently completed. Therefore, the artificial board hot-pressing fast constant-temperature control device has the advantages of being fast in achievement of constant temperature and cooling, low in energy consumption, even in temperature of the hot pressing plate and the like.

Description

technical field [0001] The invention belongs to the field of hot-pressing temperature control of wood-based panel hot presses, in particular to a hot-pressing machine for wood-based panels that can pass through cooling, heat, heat-conducting oil, water and steam at the same time. Constant temperature control device and control method. Background technique [0002] Traditional wood-based panel hot pressing generally adopts a steam hot press. The steam hot press uses saturated steam provided by the boiler as the heating medium and water as the cooling medium. The control of the hot pressing temperature is currently mainly controlled by LPC, and the steam temperature fluctuates greatly, and As the temperature of saturated steam increases, the pressure also increases, and the cost increases, which makes it more difficult to control the speed and stability of the temperature. The organic heat carrier heat transfer oil has the advantages of liquid phase circulation and heat trans...

Claims

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Application Information

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IPC IPC(8): B27N3/18G05D23/19
Inventor 张素梅
Owner 文安县弘林木业有限公司
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