The water mold temperature machine is composed of water tank, heating and cooling system, power transmission system, liquid level control system, temperature sensor, injection port, and other components. Usually, the pump in the power transmission system causes the hot fluid to reach the mold from the water tank equipped with a built-in heater and cooler, and then return to the water tank from the mold; The temperature sensor measures the temperature of the hot fluid and transmits the data to the controller of the control section; The controller regulates the temperature of the hot fluid, thereby indirectly adjusting the temperature of the mold. If the mold temperature machine is in production and the mold temperature exceeds the set value of the controller, the controller will open the solenoid valve and connect the water inlet pipe until the temperature of the hot liquid, that is, the mold temperature, returns to the set value. If the mold temperature is lower than the set value, the controller will turn on the heater.

Operating principle of water mold temperature machine:

The temperature sensing probe in the control part of the water mold temperature machine feeds back the detected temperature to the microcomputer device, which controls whether to heat or cool. The circulation pump in the mechanical part is responsible for the heat transfer function in the entire process.

At the beginning of startup, the water mold temperature machine is introduced into the water source through a cooling circulation pipe and automatically starts to exhaust. After the water in the entire system is replenished, observe the pressure gauge, and after the pointer stabilizes, the temperature value can be set. At this point, the heating device begins to work, and the temperature is detected by the temperature sensing probe. If the set value is not reached, the heating device continues to operate. When the temperature reaches the set value, the temperature sensing probe sends a signal back to the computer board, and the computer board outputs a signal to stop heating. If the temperature exceeds the set value, activate the cooling solenoid valve and introduce some cold water for cooling until the set temperature is reached before closing.

Application of water mold temperature machine products:

Application industries: plastic processing industry, magnesium aluminum zinc die-casting industry, PVC sheet extrusion industry, printing and printing industry, rubber plastic wire extrusion industry, coating industry, plastic film rolling machine, etc

Application process: This device is used for temperature regulation of plastic forming molds and extrusion forming drums. Through heating and cooling devices, the temperature of the molds and drums can be accurately controlled.

Effect achieved: By using a high pressure and high flow pump, a small part of the mold water channel can receive a large flow rate, and the mold temperature can be evenly controlled.

The water type mold heater includes a high-pressure superheated water circulation preheating/mold cooling circuit, a pressurized water replenishment circuit, a stabilizing circuit, and a temperature measurement and control circuit. The main work process is as follows:

(1) Mold preheating. The heating/cooling shut-off valve, inlet and outlet water pipes, molds, high-temperature conveying pumps, flow meters, one-way valves, overflow valves, and other components form a complete high-pressure superheated water circulation channel. Before the start of die-casting production, the high-temperature conveying pump and high-pressure make-up pump in the device send the softened water from the high-pressure water tank and heating/cooling unit to the die-casting mold and the heating pipeline connected to it. When the pressure in the system reaches the lower limit, the heating device will automatically start to heat up the softened water in the heating/cooling unit. When the water pressure reaches the upper limit (0.6MPa), turn off the high-pressure makeup pump. As the water temperature increases and the water continuously flows and circulates within the mold, high-pressure water undergoes heat exchange with the die-casting mold, and the mold temperature gradually increases until it reaches thermal equilibrium. When the temperature of high-pressure superheated water exceeds the set value (Zui high temperature is 180 ° C), the electric heating device automatically shuts down; When it falls below the set value, heating will automatically start to ensure that the water temperature remains at the set temperature.

(2) Mold cooling. In normal die-casting production, due to the heat exchange between high-temperature aluminum liquid and the mold, the mold temperature will continue to rise, which requires cooling of the mold. Set the temperature setting value to the desired cooling temperature value, and the device automatically opens the solenoid valve on the cooling channel. Cooling water enters the cooling pipe in the heating/cooling system, and exchanges heat with the high-pressure superheated water outside through the cold water in the pipe, resulting in a rapid decrease in the temperature of the high-pressure superheated water. The low-temperature circulating water cools the mold, Thus, the mold temperature can be maintained within a suitable working temperature range during each die-casting cycle.

(3) Water replenishment principle. During the preheating and cooling process of the mold, leakage in the pipeline can reduce the amount of softened water in the heating/cooling system, as there is a certain correspondence between water pressure and temperature. If water is not replenished in a timely manner, it will affect the high heating temperature of the system. Therefore, a water replenishment device must be installed. In this device, a water replenishment system is composed of solenoid valves, high-pressure water replenishment pumps, one-way valves, high-pressure water tanks, etc. in the water replenishment pipeline, which automatically replenishes softened water according to changes in pressure in the system. While ensuring system pressure, it also ensures that the flow rate of high-pressure superheated water in the system is maintained at around 50L/min.

(4) Principle of voltage stabilization. This device is pressurized to the high-pressure water tank through an energy accumulator, so that the high-pressure water heating and circulation system is always at a pressure of around 0.6MPa. When the pressure is below 0.6MPa, the high-pressure make-up water pump is automatically started to replenish softened water, thereby increasing the pressure. When the pressure reaches, the high-pressure make-up water pump will automatically shut down; When the pressure exceeds 0.6MPa, the overflow valve installed on the high-pressure water tank will automatically relieve the pressure. When the pressure is relieved to the set value, the overflow valve will automatically close.