Device for cleaning water path of injection mold

Abstract

The utility model discloses a device for cleaning a waterway of an injection mold, which belongs to the field of circulating water treatment equipment and comprises a cleaning device, the cleaning device is linearly connected with an electric control device and comprises a water tank, a pneumatic valve and a pulse valve, a booster pump is arranged at the top of the water tank, and the pulse valve is arranged at the output end of the water tank. According to the utility model, the die can be flushed in two directions instead of one-way flushing, meanwhile, a medicine cleaning method and a manual cleaning method are not adopted, the die is not disassembled frequently, the dead angles of the complex die can be cleaned, the complex pipeline and valve design is abandoned, and the efficient use of the die is ensured.

Description

Technical Field

[0001] This utility model relates to the field of circulating water treatment equipment, and in particular to a device for cleaning the water channels of injection molds. Background Technology

[0002] In modern industry, molds are widely used in fields such as automobiles, electronics, and aerospace. Without proper cleaning and maintenance, molds can experience blockages in their water pipes. If the water pipes are not cleaned promptly after use, rust and scale will accumulate over time, leading to severe blockages, reduced pipe diameter, and increased cleaning difficulty. Furthermore, rust on the mold surface can affect mold precision, resulting in inconsistent product dimensions and increased defect rates.

[0003] Cleaning and maintenance of molds require the use of cleaning machines. However, traditional mold cleaning machines use unidirectional rinsing and add cleaning chemicals during the rinsing process. Long-term use of these cleaning chemicals can have a negative impact on the mold, namely, corroding the mold's water channels. In addition, the unidirectional rinsing method is not very effective and cannot effectively impact the large amount of rust and scale that accumulates in the mold's water channels, increasing the difficulty of cleaning. Meanwhile, manual cleaning using brushes, wires, or high-pressure water guns is time-consuming and inefficient, often requiring several hours for a single cleaning session. It is also difficult to clean complex mold corners and dead angles. The complex pipelines and valves also consume water pressure, and frequent disassembly can easily damage the mold. All of these factors seriously restrict the efficient use of molds.

[0004] To overcome the above-mentioned shortcomings, the inventors invented a device for cleaning the water channels of injection molds. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a device for cleaning the water channels of injection molds, which can realize bidirectional flushing of the mold instead of unidirectional flushing, and eliminate the need for chemical cleaning and manual cleaning methods, reduce the need for frequent mold disassembly, clean the dead corners of complex molds, and eliminate the need for complicated pipeline and valve design, thus ensuring the efficient use of the mold.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0007] An apparatus for cleaning the water channels of an injection mold includes a cleaning device and an electrical control device linearly connected. The cleaning device includes a water tank, a pneumatic valve, and a pulse valve. A booster pump is installed at the top of the water tank, and a pulse valve is installed at the output end of the water tank. The pulse valve is connected to the pneumatic valve, which is connected to a three-position four-way valve. Ports A and B of the three-position four-way valve are connected to the inlet and outlet of the mold water channels, respectively, and port T of the three-position four-way valve is connected to the input end of the water tank.

[0008] As a further implementation, the electrical control device includes a PLC, a pressure sensor, a flow sensor, and a frequency converter. The pressure sensor is located at port A of the three-position four-way valve, the flow sensor is located at the inlet of the mold, the frequency converter is linearly connected to the pulse valve, and the three-position four-way valve is linearly connected to the PLC.

[0009] As a further implementation method, a check valve is installed at the inlet of the mold water channel.

[0010] As a further implementation, a solenoid valve is installed between the three-position four-way valve and the mold water circuit.

[0011] As a further implementation, a Venturi gas-liquid mixer is installed between the output end of the water tank and the pulse valve.

[0012] The beneficial effects of this utility model are as follows:

[0013] This invention features a pulse valve installed at the output end of a water tank. The pulse valve is connected to a pneumatic valve, which in turn is connected to a three-position four-way valve. Ports A and B of the three-position four-way valve are connected to the inlet and outlet of the mold, respectively, while port T is connected to the input end of the water tank. This eliminates the need for unidirectional flushing and instead employs bidirectional flushing of the mold. Furthermore, it eliminates the need for chemical cleaning and manual cleaning methods, reduces the frequency of mold disassembly, and cleans even the hard-to-reach areas of complex molds. By eliminating complex piping and valve designs, this invention ensures the efficient use of the mold. Attached Figure Description

[0014] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0015] Figure 1 This is a schematic diagram of the frame structure of Embodiment 1 of this utility model;

[0016] Figure 2 Here is a schematic diagram of the frame structure of Embodiment 2 of this utility model:

[0017] Among them, 1. Cleaning device; 2. Electrical control device; 101. Water tank; 102. Pneumatic valve; 103. Pulse valve; 3. Booster pump; 4. Three-position four-way valve; 5. Mold; 201. Pressure sensor; 202. Flow sensor; 203. Frequency converter; 6. Check valve; 7. Solenoid valve; 8. Venturi gas-liquid mixer. Detailed Implementation

[0018] Example 1

[0019] This embodiment provides a device for cleaning the water channels of an injection mold, such as... Figure 1As shown, it includes a cleaning device 1, which is linearly connected to an electrical control device 2. The cleaning device 1, as the core cleaning module, is responsible for the physical cleaning of the water circuit of the injection mold 5. The electrical control device 2 controls the cleaning process and coordinates the start, stop and switching of various components (such as valves, booster pumps 3 and solenoid valves 7) to ensure automated and efficient operation and reduce the water pressure consumption of valves and corresponding pipelines.

[0020] The cleaning device 1 includes a water tank 101, a pneumatic valve 102, and a pulse valve 103. The water tank 101 is used to store cleaning water and provide a circulating water source. The water tank 101 has a built-in filter to remove impurities. A booster pump 3 is installed on the top of the water tank 101. The booster pump 3 is used to increase the water flow pressure and drive high-pressure water into the pipeline to enhance the physical impact on scale and rust.

[0021] A pulse valve 103 is installed at the output end of the water tank 101. The pulse valve 103 generates a pulsed high-pressure water flow (that is, a high-pressure water flow with changing frequency), which uses instantaneous pressure fluctuations to explosively peel off dirt and improve the efficiency of cleaning injection molds.

[0022] The pulse valve 103 is connected to the pneumatic valve 102. The pneumatic valve 102 controls the injection of compressed air into the water in the pipeline to form a water-air mixed pulse. That is, compressed air is mixed into the high-speed water flow, which impacts the inner wall of the water channel of the mold 5, forming an air explosion and enhancing the rinsing effect.

[0023] Pneumatic valve 102 is connected to three-position four-way valve 4 to switch the water flow direction. This is achieved through changes in the valve position of three-position four-way valve 4: the P port of three-position four-way valve 4 is connected to the incoming water from water tank 101. In forward flushing mode: port A is the inlet (i.e., water flows out through three-position four-way valve 4), and port B is the return port (i.e., the port where water flows back after flushing mold 5), with water flowing forward to flush the water passages of mold 5. In backflushing mode: port B becomes the inlet, and port A becomes the return port, with water flowing backward to impact the water passages of mold 5. Port T is connected to the input of water tank 101: forming a closed loop, allowing the returned wastewater to be filtered and reused.

[0024] The mold water inlet (port A) and outlet (port B) are connected to the two ends of the mold 5 water circuit to meet the requirements of forward and reverse rinsing. Ports A and B of the three-position four-way valve 4 are connected to the inlet and outlet of the mold 5 water circuit, respectively. Port T of the three-position four-way valve 4 is connected to the water inlet of the water tank 101.

[0025] The Chinese patent document CN203091357U, "A Mold Waterway Cleaning Machine," discloses a solution where, when the reverse reversing circuit is connected, the third and fourth reversing valves are closed, while the first and second reversing valves are open. Cleaning water is pumped from the water tank, flows through the second reversing valve in the waterway, and then flows into the mold through the outflowing cleaning pipe to rinse the mold. This "Mold Waterway Cleaning Machine" uses at least four valves and eight corresponding interfaces, requiring the cooperation of four valves to switch between two rinsing directions (forward and reverse). This results in complex piping and a large number of valves, wasting liquid pressure. This application achieves the switching between two rinsing directions using only a single three-position four-way valve 4 connected to the mold 5 waterway. This application uses fewer valves and matching pipes, and its piping design is simpler, resulting in less space required, easier maintenance, and higher work efficiency. When the three-position four-way valve 4 is in the left position, the specific connection is: P connects to A, and B connects to T. When the 4-way valve core of the three-position four-way valve is in the neutral position, the specific connection relationship is: P is connected to T. When the 4-way valve core of the three-position four-way valve is in the right position, the specific connection relationship is: P is connected to B, and A is connected to T.

[0026] The electrical control device 2 includes a PLC, a pressure sensor 201, a flow sensor 202, and a frequency converter 203. The pressure sensor 201 is located at port A of the three-position four-way valve 4, and the flow sensor 202 is located at the inlet of the mold 5. The frequency converter 203 is linearly connected to the pulse valve 103, and the frequency converter 203 can adjust the working frequency of the pulse valve 103. The three-position four-way valve 4 is linearly connected to the PLC (that is, the PLC can realize the switching of the valve core of the three-position four-way valve 4 between the left, middle, and right positions). The PLC acts as the control center, coordinating the operation process of the entire cleaning device (such as forward / reverse rinsing switching, cleaning time setting, pressure / flow threshold control, etc.) to achieve automated and efficient operation. The PLC can be operated through a touch screen.

[0027] A one-way valve 6 is installed at the inlet of the water channel of mold 5. This design is to prevent water from flowing back into the water channel of mold 5 (i.e., to prevent water from flowing in the opposite direction). A solenoid valve 7 is installed between the three-position four-way valve 4 and the water channel of mold 5. The solenoid valve 7 is linearly connected to the PLC. The solenoid valve 7 can be used to isolate mold 5 from the cleaning device, protect the equipment, and prevent liquid residue.

[0028] Example 2

[0029] The difference between this embodiment and Embodiment 1 is as follows:

[0030] like Figure 2As shown, a Venturi gas-liquid mixer 8 is installed between the output end of the water tank 101 and the pulse valve 103. Utilizing the Venturi effect, compressed air and cleaning fluid are efficiently mixed to generate a two-phase gas-liquid flow (containing a large number of microbubbles). Under the action of the pulse, the bubbles generate a cavitation effect (explosive impact), enhancing the ability to peel off scale and rust, and improving the physical cleaning effect.

[0031] Chinese patent CN208133410U, "An Automatic Water Channel Cleaning Device for Injection Molds," discloses a method where an air compressor and water pipe operate simultaneously, with both air and water entering a water tank. The water is then transported to the mold via a water pipe. However, this method is rather general and abstract, lacking a deeper understanding and design of the water-vapor mixing state. This application uses a Venturi gas-liquid mixer 8 to achieve a two-phase flow (containing a large number of microbubbles). Therefore, this application achieves better gas and liquid mixing and makes it easier to clean complex mold dead corners.

[0032] The other device schemes in Example 2 are the same as those in Example 1.

[0033] The arrows in the attached diagram indicate the direction of the forward flushing water flow.

[0034] The length, height, and curvature of the lines of water tank 101, three-position four-way valve 4, and booster pump 3 in the attached diagram are for illustrative purposes only. Those skilled in the art can make adaptive adjustments according to actual usage.

[0035] Touch screens are a standard feature in the prior art. Those skilled in the art can select appropriate devices or settings based on the above description to realize that "PLC can be operated via touch screen".

[0036] The frequency converter 203 uses the INVT CHV series, and the pressure sensor 201 and flow sensor 202 are the same as the pressure sensor and flow monitoring sensor disclosed in Chinese patent document CN219052207U.

[0037] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An apparatus for cleaning a waterway of an injection mold, comprising a cleaning device, characterized in that, The cleaning device and the electrical control device are linearly connected. The cleaning device includes a water tank, a pneumatic valve, and a pulse valve. A booster pump is installed on the top of the water tank, and a pulse valve is installed at the output end of the water tank. The pulse valve is connected to the pneumatic valve, and the pneumatic valve is connected to a three-position four-way valve. Ports A and B of the three-position four-way valve are connected to the inlet and outlet of the mold water circuit, respectively, and port T of the three-position four-way valve is connected to the input end of the water tank.

2. The apparatus for cleaning an injection mold water channel of claim 1, wherein, The electrical control device includes a PLC, a pressure sensor, a flow sensor, and a frequency converter. The pressure sensor is located at port A of the three-position four-way valve, the flow sensor is located at the inlet of the mold, the frequency converter is linearly connected to the pulse valve, and the three-position four-way valve is linearly connected to the PLC.

3. The apparatus for cleaning an injection mold water channel of claim 2, wherein, A check valve is installed at the inlet of the mold's water channel.

4. The apparatus for cleaning the water line of an injection mold of claim 2, wherein, A solenoid valve is installed between the three-position four-way valve and the mold water circuit.

5. The apparatus for cleaning an injection mold water channel of claim 1, wherein, A Venturi gas-liquid mixer is installed between the output end of the water tank and the pulse valve.

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