Die-casting machine cooling system and die-casting machine

Abstract

The utility model relates to the technical field of die-casting machines, in particular to a die-casting machine cooling system and a die-casting machine, the die-casting machine cooling system comprises a PLC control cabinet, an alarm, a water storage tank and a water pump, a PLC is arranged in the PLC control cabinet, and the alarm and the water pump are both electrically connected with the PLC; the water storage tank, the water pump, the water inlet pipe and a cooling pipeline of the die-casting die are sequentially communicated. The cooling pipeline is communicated with the water storage tank through a water return pipe. The water inlet pipe is provided with a pressure sensor, the water inlet pipe and the water return pipe are each provided with a temperature sensor and a flow sensor, and the pressure sensor, the temperature sensors and the flow sensors are all electrically connected with the PLC. By monitoring the water inlet and outlet flow difference and the temperature difference of the die-casting die, the abnormal condition of the cooling pipeline can be obtained, the die-casting process condition is maintained to be stable, the product quality is guaranteed, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of die-casting machines, in particular to a die-casting machine cooling system and a die-casting machine. Background Art

[0002] The die casting machine is an industrial casting machine that injects molten metal into the die casting mold under pressure, cools it into shape and opens the mold to obtain metal castings. Among them, cooling the die casting mold is an important part of the production process.

[0003] During the production process, the die-casting mold is kept flowing with water at all times to ensure that the die-casting mold is in a cooling state. If the sealing of the mold cannot be guaranteed, the mold will leak. At the same time, under high temperature conditions (temperature 680-700℃), the leaking water will turn into steam and enter the interior of the die-casting mold. When the high-speed and high-pressure molten metal liquid fills the mold cavity, steam will enter the interior of the product, causing air holes to form inside the product, resulting in a decline in product quality. However, since the mold is produced continuously, this phenomenon cannot be detected in time.

[0004] In order to solve the above technical problems, it is very necessary to design a die-casting machine cooling system that can obtain water leakage information in a timely manner. Utility Model Content

[0005] The purpose of the utility model is to provide a die-casting machine cooling system and a die-casting machine. By monitoring the cooling water pressure and the inlet and outlet water temperature and flow rate of the die-casting mold cooling pipeline, it is possible to obtain abnormal conditions of the die-casting mold cooling pipeline in a timely manner, thereby solving the problem of untimely acquisition of die-casting mold leakage information.

[0006] The embodiment of the utility model is realized by the following technical solution: a die-casting machine cooling system, comprising a PLC control cabinet, an alarm, a water storage tank and a water pump, wherein a PLC programmable controller is provided in the PLC control cabinet, and the alarm and the water pump are electrically connected to the PLC programmable controller;

[0007] The water outlet of the water storage tank is connected to the water inlet of the water pump, the water outlet of the water pump is connected to the water inlet of the cooling pipe of the die-casting mold through the water inlet pipe, and the water outlet of the cooling pipe is connected to the water inlet of the water storage tank through the return pipe;

[0008] The water inlet pipe is equipped with a water inlet pressure sensor, a water inlet temperature sensor and a water inlet flow sensor, and the water inlet pressure sensor, water inlet temperature sensor and water inlet flow sensor are all electrically connected to the PLC programmable controller. The return water pipe is equipped with a return water temperature sensor and a return water flow sensor, and the return water temperature sensor and return water flow sensor are all electrically connected to the PLC programmable controller.

[0009] According to a preferred embodiment, the alarm is arranged in a PLC control cabinet.

[0010] According to a preferred embodiment, the water inlet pressure sensor, water inlet temperature sensor, water inlet flow sensor, return water temperature sensor and return water flow sensor are all electrically connected to the PLC programmable controller via signal lines.

[0011] According to a preferred embodiment, the water inlet pressure sensor is arranged between the water pump and the water inlet flow sensor, the water inlet temperature sensor is arranged between the water inlet flow sensor and the die-casting mold, and the return water temperature sensor is arranged between the return water flow sensor and the die-casting mold.

[0012] According to a preferred embodiment, the die-casting mold is provided with a plurality of cooling channels, including a first cooling channel arranged on the movable mold and a second cooling channel arranged on the fixed mold.

[0013] According to a preferred embodiment, it also includes a heat exchanger, the cold side input end and the cold side output end of the heat exchanger are connected to an external water source, the water outlet end of the return pipe is connected to the hot side input end of the heat exchanger, and the hot side output end of the heat exchanger is connected to the water inlet end of the water tank.

[0014] The utility model also provides a die-casting machine, comprising the die-casting machine cooling system as described above.

[0015] The technical solution of a die-casting machine cooling system and die-casting machine provided by the present invention has at least the following advantages and beneficial effects: (1) by monitoring the flow rate difference and temperature difference of water inlet and outlet of the die-casting mold, it is possible to quickly determine the abnormality of the cooling pipeline, such as blockage or leakage, so as to take timely measures to avoid production interruption and casting quality problems, improve production efficiency, and maintain stable die-casting process conditions; (2) by monitoring the cooling water pressure, it is possible to achieve precise control of the temperature of the die-casting mold, and avoid problems such as mold sticking and incomplete cooling and solidification of the casting caused by excessive temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a die-casting machine cooling system provided in Example 1 of the present utility model;

[0017] Icons: 1-PLC control cabinet, 2-water tank, 3-water pump, 4-water inlet pressure sensor, 5-water inlet flow sensor, 6-water inlet temperature sensor, 7-water inlet pipe, 8-water return pipe, 9-return water temperature sensor, 10-return water flow sensor, 11-punching rod, 12-punching guide tube, 13-fixed mold, 14-movable mold, 15-molten metal feed port, 16-heat exchanger, 17-external water source. DETAILED DESCRIPTION

[0018] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0019] Example 1

[0020] Figure 1 This is a schematic diagram of the structure of a die casting machine cooling system provided by Example 1 of the present utility model. Figure 1 As shown, the die-casting machine cooling system includes a PLC control cabinet 1, an alarm, a water tank 2 and a water pump 3.

[0021] Specifically, the PLC control cabinet 1 is equipped with a PLC programmable controller, an alarm and a human-computer interaction interface, and the human-computer interaction interface, the alarm and the water pump 3 are all electrically connected to the PLC programmable controller; the water outlet end of the water tank 2 is connected to the water inlet end of the water pump 3, and the water outlet end of the water pump 3 is connected to the water inlet end of the cooling pipe of the die-casting mold through the water inlet pipe 7, and the water outlet end of the cooling pipe is connected to the water inlet end of the water tank 2 through the return pipe 8.

[0022] Furthermore, the water inlet pipe 7 is provided with a water inlet pressure sensor 4, a water inlet temperature sensor 6 and a water inlet flow sensor 5, and the water inlet pressure sensor 4, the water inlet temperature sensor 6 and the water inlet flow sensor 5 are all electrically connected to the PLC programmable controller. The return water pipe 8 is provided with a return water temperature sensor 9 and a return water flow sensor 10, and the return water temperature sensor 9 and the return water flow sensor 10 are all electrically connected to the PLC programmable controller.

[0023] In this embodiment, a water inlet pressure sensor 4 is provided to monitor the cooling water pressure in the water inlet pipe 7 in real time, and then the water pump 3 is controlled so that a dynamic balance is formed between the input amount of cooling water and the temperature of the die-casting mold, thereby achieving precise control of the temperature of the die-casting mold. This can avoid problems such as mold sticking and incomplete cooling and solidification of the casting caused by excessive temperature, and ensure that the temperature of the die-casting mold drops steadily without reducing production efficiency, thereby improving product quality.

[0024] At the same time, by setting the inlet temperature sensor 6 and the return temperature sensor 9, the water temperature of the cooling water is monitored in real time, so as to obtain the temperature difference between the inlet and outlet water of the die-casting mold. The flow of the cooling water is monitored in real time by the inlet flow sensor 5 and the return flow flow sensor 10, so as to obtain the inlet and outlet water flow difference of the die-casting mold. The abnormal conditions of the cooling pipeline, such as blockage or leakage, can be quickly judged, so that timely measures can be taken to avoid production interruptions and casting quality problems, improve production efficiency, and maintain stable die-casting process conditions.

[0025] As a supplement to the technical solution of this embodiment, the human-computer interaction interface is used to display real-time data such as water pressure, water temperature at the inlet and outlet of the die-casting mold, flow difference, etc., and record the data; in addition, the alarm threshold can also be set through the human-computer interaction interface. When the water pressure, water temperature, water flow, water temperature difference at the inlet and outlet of the die-casting mold, and flow difference are lower than or higher than the alarm threshold, the alarm is triggered to sound an alarm.

[0026] As a supplement to the technical solution of this embodiment, the water inlet pressure sensor 4, the water inlet temperature sensor 6, the water inlet flow sensor 5, the return water temperature sensor 9 and the return water flow sensor 10 are all electrically connected to the PLC programmable controller through signal lines.

[0027] As a supplement to the technical solution of this embodiment, the die-casting mold is provided with multiple cooling pipes, including a first cooling pipe arranged on the movable mold 14, a second cooling pipe arranged on the fixed mold 13, and a third cooling pipe arranged on the stamping mechanism (stamping rod 11, stamping conduit 12, etc.). The molten metal enters the mold cavity through the molten metal feed port 15 on one side of the stamping conduit 12; the water inlet pressure sensor 4 is arranged between the water pump 3 and the water inlet flow sensor 5, and the water inlet temperature sensor 6 is arranged between the water inlet flow sensor 5 and the die-casting mold to realize real-time monitoring of the pressure, flow and temperature at the water inlet end of each cooling pipe; the return water temperature sensor 9 is arranged between the return water flow sensor 10 and the die-casting mold to realize real-time monitoring of the flow and temperature at the water outlet end of each cooling pipe. In addition, a sensor can also be configured for each cooling pipe separately to obtain the temperature and flow information of the corresponding cooling pipe to realize abnormal monitoring of each cooling pipe.

[0028] As a supplement to the technical solution of this embodiment, a heat exchanger 16 is also included, the cold side input end and the cold side output end of the heat exchanger 16 are connected to the external water source 17, the water outlet end of the return pipe 8 is connected to the hot side input end of the heat exchanger 16, and the hot side output end of the heat exchanger 16 is connected to the water inlet end of the water tank 2.

[0029] In this embodiment, the cooling water in the return pipe 8 is heat exchanged through the external water source 17 to reduce the temperature of the cooling water. On the one hand, it can reduce the temperature of the circulating water and improve the cooling effect of the circulating water. On the other hand, it can realize waste heat recovery and improve economic benefits.

[0030] Example 2

[0031] This embodiment provides a die-casting machine based on the technical solution provided in the embodiment, including the die-casting machine cooling system as in Example 1.

[0032] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A die casting machine cooling system, characterized in that: The system comprises a PLC control cabinet (1), an alarm, a water storage tank (2) and a water pump (3); a PLC programmable controller is provided in the PLC control cabinet (1); and the alarm and the water pump (3) are both electrically connected to the PLC programmable controller; The water outlet of the water storage tank (2) is connected to the water inlet of the water pump (3), the water outlet of the water pump (3) is connected to the water inlet of the cooling pipe of the die-casting mold through the water inlet pipe (7), and the water outlet of the cooling pipe is connected to the water inlet of the water storage tank (2) through the return pipe (8); The water inlet pipe (7) is provided with a water inlet pressure sensor (4), a water inlet temperature sensor (6) and a water inlet flow sensor (5), and the water inlet pressure sensor (4), the water inlet temperature sensor (6) and the water inlet flow sensor (5) are all electrically connected to the PLC programmable controller; the water return pipe (8) is provided with a return water temperature sensor (9) and a return water flow sensor (10), and the return water temperature sensor (9) and the return water flow sensor (10) are all electrically connected to the PLC programmable controller.

2. The die casting machine cooling system according to claim 1, characterized in that: The alarm is arranged in a PLC control cabinet (1).

3. The die casting machine cooling system according to claim 1, characterized in that: The water inlet pressure sensor (4), water inlet temperature sensor (6), water inlet flow sensor (5), return water temperature sensor (9) and return water flow sensor (10) are all electrically connected to the PLC programmable controller via signal lines.

4. The die casting machine cooling system according to claim 1, characterized in that: The water inlet pressure sensor (4) is arranged between the water pump (3) and the water inlet flow sensor (5), the water inlet temperature sensor (6) is arranged between the water inlet flow sensor (5) and the die-casting mold, and the return water temperature sensor (9) is arranged between the return water flow sensor (10) and the die-casting mold.

5. The die casting machine cooling system according to claim 1, characterized in that: The die-casting mold is provided with a plurality of cooling pipes, including a first cooling pipe arranged on the movable mold (14) and a second cooling pipe arranged on the fixed mold (13).

6. The die casting machine cooling system according to claim 1, characterized in that: It also includes a heat exchanger (16), wherein the cold side input end and the cold side output end of the heat exchanger (16) are connected to an external water source (17), the water outlet end of the return pipe (8) is connected to the hot side input end of the heat exchanger (16), and the hot side output end of the heat exchanger (16) is connected to the water inlet end of the water storage tank (2).

7. A die casting machine, characterized in that: The cooling system comprises the die casting machine according to any one of claims 1 to 6.

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