A continuous double-channel cooling and heat dissipation assembly for injection mold

Abstract

This utility model discloses a continuous dual-channel cooling and heat dissipation assembly for injection molds, relating to the field of injection mold cooling technology. The continuous dual-channel cooling and heat dissipation assembly for injection molds includes a water tank, with a heat dissipation mechanism located below the water tank: an air-cooling assembly, positioned below the water tank, cools the circulating water by generating airflow; and a compression refrigeration assembly, including a compressor located on one side of the water tank, which converts gaseous refrigerant into a low-temperature, low-pressure liquid state through the compressor, condenser, and expansion valve. Part of the liquid refrigerant evaporates into a gas-liquid two-phase mixture, which then enters the evaporation pipe through a connecting pipe, absorbing heat from the cooling water and completely evaporating into a low-temperature, low-pressure gaseous state. This absorption of a large amount of heat from the cooling water through latent heat of phase change facilitates rapid cooling of the water, ensuring that the cooling water is discharged from the water tank at an even lower temperature, thus improving the cooling effect.

Description

Technical Field

[0001] This utility model relates to the field of injection mold cooling technology, specifically a continuous dual-channel cooling and heat dissipation component for injection molds. Background Technology

[0002] The core function of an injection mold cooling system is to accelerate plastic curing, precisely control mold temperature distribution, shorten production cycles, and ensure product dimensional accuracy and quality stability. It achieves rapid and uniform cooling by circulating a cooling medium (such as water, oil, or air) to remove heat, thereby improving overall production efficiency.

[0003] The existing Chinese utility model patent with publication number CN212045848U discloses an injection mold with cooling and heat dissipation function, including a water tank, a mold body, an opening, a filter, and a cooling mechanism. The mold body is fixedly installed at the midpoint of the top of the water tank. Openings are provided on both the left and right sides of the top of the water tank and the mold body. Filters are fixedly connected to the inner walls of the openings. The cooling mechanism is located on the top of the water tank and includes two side plates symmetrically arranged on the left and right sides of the top of the water tank. The bottom of the side plates is fixedly connected to the top of the water tank. This utility model, through the cooperation of the water tank, mold body, opening, filter, and cooling mechanism, can uniformly and rapidly cool the mold body under the combined action of water cooling and air cooling, thereby effectively preventing uneven stress distribution, uneven shrinkage, and uneven dimensions in injection molded products. This greatly improves the quality of plastic products, is highly practical, and is worthy of promotion.

[0004] The above-mentioned injection mold uses water cooling and air cooling to dissipate heat from the mold. It uses airflow and coolant to dissipate heat from the mold. Since the coolant and airflow cannot reach a low temperature, the cooling effect of this method is limited. Furthermore, the temperature of the cooling water will continue to rise after multiple cycles, and the temperature difference between the cooling water and the mold will decrease, resulting in a reduction in heat exchange efficiency. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a continuous dual-channel cooling and heat dissipation component for injection molds, which solves the problems of limited cooling effect and decreased heat exchange efficiency after the cooling water temperature rises.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a continuous dual-channel cooling and heat dissipation assembly for injection molds includes a water tank, and a heat dissipation mechanism is provided below the water tank.

[0007] The air-cooled component is located below the water tank and cools the circulating water by generating airflow.

[0008] A compression refrigeration assembly includes a compressor disposed on one side of a water tank. A delivery pipe is fixedly installed at the output end of the compressor. A condenser is fixedly installed at the end of the delivery pipe. An expansion valve is fixedly installed at the output end of the condenser. A connecting pipe is fixedly installed at one end of the expansion valve. An evaporator is fixedly installed at the upper end of the connecting pipe. A return pipe is fixedly installed at one end of the evaporator.

[0009] Preferably, a top cover is fixedly installed on the top of the water tank, an inlet pipe is inserted through the top of the top cover, a discharge pipe is inserted through the left side of the water tank, a temperature sensor is inserted through one side of the discharge pipe, and a water pump is installed at the bottom of the discharge pipe.

[0010] Preferably, the water tank has a partition in the center, the inlet pipe passes through the top cover and communicates with two chambers of the water tank, the outlet pipe has two branches above it that communicate with the two chambers inside the water tank, the temperature sensor is located at the intersection of the outlet pipe branches, and the outlet pipe is fixedly connected to the inlet end of the water pump.

[0011] Preferably, the air-cooling assembly includes a limiting tube fixedly installed at the bottom of the water tank, a heat pipe is inserted inside the limiting tube, heat dissipation fins are provided on the outside of the heat pipe, a mounting plate is fixedly installed at one end of the limiting tube, and a fan is fixedly installed on one side of the mounting plate.

[0012] Preferably, the heat pipe passes through both the limiting tube and the water tank, the heat dissipation fins are vertically and equidistantly installed inside the limiting tube, and the heat dissipation fins are penetrated by the heat pipe, the surface of the mounting plate is provided with an opening structure consistent with the coverage area of ​​the fan blades, and the fan is connected to the mounting plate by bolts.

[0013] Preferably, the condenser and evaporator are filled with refrigerant, the suction end of the compressor is connected to the bottom end of the return pipe, and the discharge end is connected to the delivery pipe. The condenser is installed at the front end of the limiting pipe, and a fan is also installed on the front side of the condenser via a mounting plate. There are two evaporator tubes, and both ends of the evaporator tubes vertically penetrate the top cover. The evaporator tubes are located in two chambers of the water tank.

[0014] Beneficial effects

[0015] This invention provides a continuous dual-channel cooling and heat dissipation assembly for injection molds. Compared with the prior art, it has the following advantages:

[0016] (1) The continuous dual-channel cooling and heat dissipation component used in this injection mold delivers water from the water tank to the conformal pipe inside the mold through a water pump. The water absorbs heat from the mold. After the cooling water is discharged from the mold, it can enter the water tank through the liquid inlet pipe to form a circulation. The compressor can compress the gaseous refrigerant inside the evaporator tube, compressing the gaseous refrigerant into a high-temperature and high-pressure superheated gas state. The high-temperature and high-pressure gaseous refrigerant can enter the condenser through the delivery pipe. The condenser can facilitate the cooling of the refrigerant, so that the refrigerant is in a high-pressure and supercooled liquid state when it is discharged from the condenser. Then the refrigerant flows through the expansion valve. Through the throttling and pressure reduction of the expansion valve, the temperature of the refrigerant drops sharply to a low-temperature and low-pressure state. Part of the liquid refrigerant evaporates into a gas-liquid two-phase mixture. Then the refrigerant will enter the evaporator tube through the connecting pipe, absorb the heat of the cooling water, and completely evaporate into a low-temperature and low-pressure gas state. It absorbs a large amount of heat from the cooling water through the latent heat of phase change, so as to quickly cool the cooling water, so that the cooling water is at a lower temperature when it is discharged from the water tank, thereby improving the cooling effect.

[0017] (2) The continuous dual-channel cooling and heat dissipation component used in this injection mold is equipped with a temperature sensor. The temperature sensor is set at the intersection of the branch structure of the discharge pipe. It can monitor the temperature of the cooling water when it is discharged from the water tank. At the beginning stage of mold holding pressure, the temperature difference between the cooling water and the mold is large. At this time, the temperature of the cooling water is reduced by only the fan, heat pipe and heat dissipation fins. After the cooling water circulates for a period of time, the cooling water temperature will rise due to the limited heat dissipation efficiency of the air-cooled component. The PLC controller sets a temperature threshold so that after the cooling water temperature rises above the threshold, the PLC controller can dynamically adjust the power of the compressor and fan according to the monitoring value of the temperature sensor, and adjust the refrigerant flow through the expansion valve, thereby balancing energy efficiency and cooling intensity, so that the cooling water and the mold always maintain a certain temperature difference to ensure heat exchange efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the connection structure between the water tank and the water pump of this utility model;

[0020] Figure 3 This is a schematic diagram of the heat pipe installation structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the connection structure between the condenser and the evaporator tube of this utility model;

[0022] In the diagram: 1. Water tank; 11. Top cover; 12. Inlet pipe; 13. Outlet pipe; 14. Temperature sensor; 15. Water pump; 2. Heat dissipation mechanism; 21. Air-cooled assembly; 211. Limiting pipe; 212. Heat pipe; 213. Heat dissipation fins; 214. Mounting plate; 215. Fan; 22. Compression refrigeration assembly; 221. Compressor; 222. Delivery pipe; 223. Condenser; 224. Expansion valve; 225. Connecting pipe; 226. Evaporator pipe; 227. Return pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4 This utility model provides a technical solution: a continuous dual-channel cooling and heat dissipation assembly for injection molds, including a water tank 1, a top cover 11 fixedly installed on the top of the water tank 1, an inlet pipe 12 inserted through the top of the top cover 11, an outlet pipe 13 inserted through the left side of the water tank 1, a temperature sensor 14 inserted through one side of the outlet pipe 13, a water pump 15 installed at the bottom end of the outlet pipe 13, a partition is set in the center of the water tank 1, the inlet pipe 12 passes through the top cover 11 and communicates with two chambers of the water tank 1 respectively, two branches are set above the outlet pipe 13 and communicate with the two chambers inside the water tank 1, the temperature sensor 14 is set at the intersection of the branch structure of the outlet pipe 13, and the outlet pipe 13 is fixedly connected to the inlet end of the water pump 15.

[0025] Specifically, the water tank 1 can store a certain amount of cooling water, the inlet pipe 12 facilitates the return of cooling water, which enters the water tank 1 from the top, the outlet pipe 13 facilitates the water pump 15 to extract the low-temperature cooling water from the bottom of the water tank 1, the temperature sensor 14 is model NR81539B, the temperature sensor 14 can monitor the temperature when the cooling water is discharged, the water pump 15 is model XBD8.0 / 30G-L, the water pump 15 can deliver cooling water to the conformal pipe in the mold.

[0026] A heat dissipation mechanism 2 is installed at the bottom of water tank 1.

[0027] The air-cooling component 21 is located below the water tank 1 and generates airflow to cool the circulating water. The air-cooling component 21 includes a limiting tube 211 fixedly installed at the bottom of the water tank 1. A heat pipe 212 is installed inside the limiting tube 211. Heat dissipation fins 213 are provided on the outside of the heat pipe 212. A mounting plate 214 is fixedly installed at one end of the limiting tube 211. A fan 215 is fixedly installed on one side of the mounting plate 214. The heat pipe 212 passes through both the limiting tube 211 and the water tank 1. The heat dissipation fins 213 are installed vertically and equidistantly inside the limiting tube 211 and are penetrated by the heat pipe 212. The surface of the mounting plate 214 has an opening structure with the same coverage area as the fan blades of the fan 215. The fan 215 is connected to the mounting plate 214 by bolts.

[0028] Specifically, the limiting tube 211 restricts the airflow through the space between the heat dissipation fins 213, absorbs the temperature of the cooling water inside the water tank 1 through the heat pipe 212, and increases the heat exchange area between the bottom of the heat pipe 212 and the airflow through the heat dissipation fins 213. The surface of the mounting plate 214 is provided with holes for bolt installation, so as to fix the position of the fan 215 through the mounting plate 214. The fan 215 is model G-80A. The fan 215 generates airflow that blows towards the heat dissipation fins 213, so that the airflow carries away the heat at the bottom of the heat pipe 212, so that the cooling medium inside the heat pipe 212 releases heat and liquefies, and moves upward under the influence of the internal capillary structure, forming a cooling medium circulation to cool the cooling water.

[0029] The compression refrigeration assembly 22 includes a compressor 221 located on one side of the water tank 1. A delivery pipe 222 is fixedly installed at the output end of the compressor 221. A condenser 223 is fixedly installed at the end of the delivery pipe 222. An expansion valve 224 is fixedly installed at the output end of the condenser 223. A connecting pipe 225 is fixedly installed at one end of the expansion valve 224. An evaporator 226 is fixedly installed at the upper end of the connecting pipe 225. A return pipe 227 is fixedly installed at one end of the evaporator 226. The condenser 223 and the evaporator 226 are filled with refrigerant. The suction end of the compressor 221 is connected to the bottom end of the return pipe 227, and the discharge end is connected to the delivery pipe 222. The condenser 223 is installed at the front end of the limiting pipe 211, and a fan 215 is also installed on the front side of the condenser 223 through the mounting plate 214. There are two evaporator pipes 226, and both ends of the evaporator pipes 226 vertically penetrate the top cover 11. The evaporator pipes 226 are located in two chambers of the water tank 1.

[0030] Specifically, the compressor 221 is model C-L55M8E. The compressor 221 compresses the gaseous refrigerant inside the evaporator 226, transforming it into a high-temperature, high-pressure superheated gas. This high-temperature, high-pressure gaseous refrigerant then enters the condenser 223 through the delivery pipe 222. The copper tubes and heat sinks inside the condenser 223 cool the refrigerant through airflow, ensuring that the refrigerant is in a high-pressure, subcooled liquid state when it exits the condenser 223. Afterward, the refrigerant flows through the expansion valve 224, model DX2025S, which can receive electrical signals for adjustment. The refrigerant temperature drops sharply to a low-temperature, low-pressure state due to the throttling and pressure reduction of the expansion valve 224. Some of the liquid refrigerant evaporates into a gas-liquid two-phase mixture. The refrigerant then enters the evaporator 226 through the connecting pipe 225, absorbs heat from the cooling water, and completely evaporates into a low-temperature, low-pressure gaseous state. It absorbs a large amount of heat from the cooling water through the latent heat of phase change, so as to quickly cool the cooling water. The gaseous refrigerant will flow back to the compressor 221 through the return pipe 227 to form a cycle. At the same time, all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0031] During operation, water from the water tank 1 is pumped by water pump 15 to the conformal pipe inside the mold. The water absorbs heat from the mold. After the cooling water is discharged from the mold, it can enter the water tank 1 through the liquid inlet pipe 12 to form a circulation. The compressor 221 compresses the gaseous refrigerant inside the evaporator pipe 226, compressing it into a high-temperature, high-pressure superheated gas state. The high-temperature, high-pressure gaseous refrigerant can enter the condenser 223 through the delivery pipe 222. The condenser 223 facilitates the cooling of the refrigerant, so that the refrigerant is in a high-pressure, supercooled liquid state when it exits the condenser 223. Then, the refrigerant flows through the expansion valve 224. Through the throttling and pressure reduction of the expansion valve 224, the refrigerant temperature drops sharply to a low-temperature, low-pressure state. Part of the liquid refrigerant evaporates into a gas-liquid two-phase mixture. Then, the refrigerant will enter the evaporator pipe 226 through the connecting pipe 225, absorb heat from the cooling water, and completely evaporate into a low-temperature, low-pressure gas state. It absorbs a large amount of heat from the cooling water through the latent heat of phase change. The cooling water is cooled quickly so that it is discharged from the water tank 1 at a lower temperature, thus improving the cooling effect. Temperature sensor 14 is located at the intersection of the branch structure of the discharge pipe 13 and can monitor the temperature of the cooling water when it is discharged from the water tank 1. At the beginning of the mold holding pressure stage, the temperature difference between the cooling water and the mold is large. At this time, the cooling water temperature is reduced only by fan 215, heat pipe 212, and heat sink 213. After the cooling water circulates for a period of time, the cooling water temperature will rise due to the limited heat dissipation efficiency of the air-cooled component 21. The PLC controller sets a temperature threshold so that after the cooling water temperature rises above the threshold, the PLC controller can dynamically adjust the power of compressor 221 and fan 215 according to the monitoring value of temperature sensor 14, and adjust the refrigerant flow through expansion valve 224, thereby balancing energy efficiency and cooling intensity, so that the cooling water and the mold always maintain a certain temperature difference to ensure heat exchange efficiency.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A continuous dual-channel cooling and heat dissipation assembly for injection molds, comprising a water tank (1), characterized in that: A heat dissipation mechanism (2) is provided below the water tank (1): The air-cooled component (21) is located below the water tank (1) and cools the circulating water by generating airflow; The compression refrigeration assembly (22) includes a compressor (221) disposed on one side of the water tank (1). A delivery pipe (222) is fixedly installed at the output end of the compressor (221). A condenser (223) is fixedly installed at the end of the delivery pipe (222). An expansion valve (224) is fixedly installed at the output end of the condenser (223). A connecting pipe (225) is fixedly installed at one end of the expansion valve (224). An evaporator (226) is fixedly installed at the upper end of the connecting pipe (225). A return pipe (227) is fixedly installed at one end of the evaporator (226).

2. The continuous dual-channel cooling and heat dissipation assembly for injection molds according to claim 1, characterized in that: A top cover (11) is fixedly installed on the top of the water tank (1). An inlet pipe (12) is inserted through the top of the top cover (11). A drain pipe (13) is inserted through the left side of the water tank (1). A temperature sensor (14) is inserted through one side of the drain pipe (13). A water pump (15) is installed at the bottom of the drain pipe (13).

3. The continuous dual-channel cooling and heat dissipation assembly for injection molds according to claim 2, characterized in that: A partition is provided in the center of the water tank (1). The inlet pipe (12) passes through the top cover (11) and is connected to the two chambers of the water tank (1). Two branches are provided above the outlet pipe (13) and are connected to the two chambers inside the water tank (1). The temperature sensor (14) is located at the intersection of the branches of the outlet pipe (13). The outlet pipe (13) is fixedly connected to the inlet end of the water pump (15).

4. The continuous dual-channel cooling and heat dissipation assembly for injection molds according to claim 1, characterized in that: The air-cooled assembly (21) includes a limiting tube (211) fixedly installed at the bottom of the water tank (1). A heat pipe (212) is inserted inside the limiting tube (211). Heat dissipation fins (213) are provided on the outside of the heat pipe (212). A mounting plate (214) is fixedly installed at one end of the limiting tube (211). A fan (215) is fixedly installed on one side of the mounting plate (214).

5. A continuous dual-channel cooling and heat dissipation assembly for injection molds according to claim 4, characterized in that: The heat pipe (212) passes through both the limiting tube (211) and the water tank (1). The heat dissipation fins (213) are vertically and equidistantly installed inside the limiting tube (211), and the heat dissipation fins (213) are penetrated by the heat pipe (212). The surface of the mounting plate (214) is provided with an opening structure that is consistent with the coverage area of ​​the fan blades (215). The fan (215) is connected to the mounting plate (214) by bolts.

6. A continuous dual-channel cooling and heat dissipation assembly for injection molds according to claim 1, characterized in that: The condenser (223) and evaporator (226) are filled with refrigerant. The suction end of the compressor (221) is connected to the bottom end of the return pipe (227), and the discharge end is connected to the delivery pipe (222). The condenser (223) is installed at the front end of the limiting pipe (211), and a fan (215) is also installed on the front side of the condenser (223) through the mounting plate (214). There are two evaporator (226), and the two ends of the evaporator (226) vertically penetrate the top cover (11). The evaporator (226) is located in two chambers of the water tank (1).

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