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A constant pressure control method for a spot cooler
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A technology of constant pressure control and spot cooler, which is applied in the field of die casting cooling, can solve the problems of mold material scrap, mold cracking, tearing, etc., to save start-up time, ensure cooling effect, and improve cooling rate.
Active Publication Date: 2020-09-01
昆山莱特库勒机械有限公司
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Problems solved by technology
Due to the harsh production environment in the die-casting production process and the particularity of metal die-casting, the mold needs to repeatedly withstand the temperature difference of nearly 400 degrees of sudden cooling and sudden heating in a short period of time, which will generate great thermal alternating stress, which can easily lead to The cracking of the mold must also bear the scouring of high-speed aluminum liquid, so the surface of the molding part of the mold is partially whitened due to high temperature, and the temperature is high. This part may bond the die-casting parts, resulting in deformation or even tearing of the pressed parts, resulting in The mold material is scrapped; at the same time, metallic die-casting needs to be poured in the liquid state of the metal and cooled to a certain temperature below the metal solidus line in the mold before the mold can be opened. Therefore, the cooling efficiency of the mold directly affects the production efficiency of die-casting, and the point cooler The constant pressure control directly affects the cooling efficiency of the mold, which in turn affects the production efficiency of die casting
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Embodiment 1
[0025] A constant pressure control method of a spot cooler, said method comprising, referring to figure 1 Shown:
[0026] S11 starts the spot cooler, the frequency converter on the spot cooler obtains the first pressure value of the water pump on the spot cooler, and transmits it to the PID controller;
[0027] The PID controller described in S12 starts the pressure storage command and sends it to the one-way valve of the spot cooler;
[0028] S13 the one-way valve closes the pressure relief valve and exhaust valve on the one-way valve after receiving the pressure storage command;
[0029] The pressure sensor on the S14 point cooler acquires the second pressure value on the one-way valve and transmits it to the PID controller;
[0030] S15, the PID controller judges whether the second pressure value is greater than a preset pressure value, if yes, execute step S16, if not, execute step S18;
[0031] The PID controller described in S16 starts the pressure relief command and ...
Embodiment 2
[0037] A constant pressure control method of a spot cooler, said method comprising, referring to figure 2 Shown:
[0038] In S21, the start point cooler, the PID controller triggers a pressure start command according to a preset pressure value, and transmits it to the water pump through the frequency converter;
[0039] S22 The water pump calculates the operating power of the water pump according to the pressure start command and starts the operation of the water pump.
[0040] The pressure sensor on the S23 point cooler acquires the second pressure value on the one-way valve and transmits it to the PID controller;
[0041] S24, the PID controller judges whether the second pressure value is greater than a preset pressure value, if yes, start step S25, if not, start step S27.
[0042] S25 starts the pressure relief command and sends it to the one-way valve of the spot cooler;
[0043] S26 After the one-way valve receives the pressure relief command, the pressure relief valv...
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Abstract
The invention discloses a constant pressure control method of a point cooling machine. The constant pressure control method includes the steps that the point cooling machine is started, a frequency converter on the point cooling machine obtains a first pressure valve of a water pump on the point cooling machine and transmits the first pressure valve to a PID controller, the PID controller starts apressure storage command and sends the pressure storage command to a one-way valve of the point cooling machine, and a pressure release valve and a vent valve on the one-way valve are closed after the one-way valve receives the pressure storage command. In the technical scheme, through the PID controller, the water pump can be started ahead of time and pressure storage can be conducted on the one-way valve, in this way, the starting time of the point cooling machine can be saved, constant pressure control over the one-way valve on the point cooling machine can be quickly realized after the point cooling machine is started, the cooling rate of a point cooling pipe at the terminal of the one-way valve to a mold is increased, and the cooling effect is guaranteed.
Description
technical field [0001] The invention relates to the technical field of die casting cooling, in particular to a constant pressure control method of a spot cooler. Background technique [0002] In the production process of die-casting molds, the temperature of the mold is a key factor affecting the excellent molding of the product. Local high or low temperature will seriously affect the molding of the product and the life of the mold. Although the mold temperature cannot reach an absolute balance in actual production, but Through the correct design of the mold structure, combined with an efficient and reasonable cooling system, the temperature of each area of the mold can be controlled. Due to the harsh production environment in the die-casting production process and the particularity of metal die-casting, the mold needs to repeatedly withstand the temperature difference of nearly 400 degrees of sudden cooling and sudden heating in a short period of time, which will generate...
Claims
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Application Information
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