Injection molding machine mold cooling device

Abstract

The utility model discloses an injection molding machine mold cooling device, and belongs to the field of injection molding, the cooling device comprises an air bellow and a water tank fixedly arranged on the air bellow, a cooling coil communicated with the water tank is arranged in the air bellow, and a cooling mechanism is arranged on the air bellow; the cooling mechanism comprises a conical cover which is fixedly arranged in the air bellow and corresponds to the upper portion of the cooling coil pipe, an exhaust fan is installed in the conical cover, a drainage cone fixedly connected with the conical cover is connected to the inner side of the cooling coil pipe in an inserted mode, and an exhaust pipe communicated with the conical cover is connected into an air outlet of the air bellow in an inserted mode. Through the flow guide effect of the flow guide cone and active air draft of the exhaust fan, a three-dimensional airflow path of bottom air inlet-spiral rising heat exchange-top air exhaust is constructed, the problems of short-circuit effect and airflow hedging of traditional one-way flow are avoided, airflow uniformity and air exchange efficiency of the surface of the cooling coil are improved, and therefore the heat exchange effect is enhanced, and the service life of the cooling coil is prolonged. Liquid temperature in the cooling coil is reduced, and temperature stability of a cooling medium in the water tank is guaranteed.

Description

Technical Field

[0001] This application relates to the field of injection molding technology, specifically to a cooling device for injection molding machine molds. Background Technology

[0002] In the injection molding process, the cooling efficiency and uniformity of the mold have a crucial impact on product quality and production efficiency.

[0003] Chinese utility model patent CN220008722U discloses a cooling device for injection molding machine molds. Circulating hot water enters a water tank after passing through a cooling coil, thus lowering the temperature. Cold air is introduced from the bottom of the cooling coil and then exhausted from both sides of the outer casing by fans, accelerating the airflow in contact with the cooling coil and further cooling the circulating water. Compared to existing water cooling methods, this utility model improves cooling efficiency. This utility model also prevents dust from adhering to the surface of the cooling coil. During use, a motor drives a cleaning rack to rotate via a rotating rod, continuously brushing the surface of the cooling coil to prevent impurities and improve heat exchange efficiency. However, when cooling the cooling coil, the cold air flows unidirectionally from bottom to top, easily creating a "short-circuit effect." The airflow velocity at the top of the coil decreases significantly, and the symmetrical exhaust from both sides easily causes airflow opposition, reducing overall ventilation efficiency.

[0004] Therefore, this application provides a cooling device for injection molding machine molds to solve the above-mentioned problems. Utility Model Content

[0005] This application provides a cooling device for injection molding machine molds, which aims to solve the problems mentioned in the background art, such as the existing cold air flowing unidirectionally from bottom to top, which easily forms a "short circuit effect" leading to a decrease in cooling efficiency in the top area of ​​the coil, the airflow collision caused by symmetrical exhaust on both sides reducing the ventilation efficiency, and the difficulty in balancing cooling uniformity and heat exchange efficiency.

[0006] To achieve the above objectives, this application provides the following technical solution: a cooling device for injection molding machine molds, comprising a blower box and a water tank fixedly mounted on the blower box. The blower box is equipped with a cooling coil that communicates with the water tank for cooling the cooling medium inside the water tank. The blower box is equipped with a cooling mechanism for cooling the cooling coil. The cooling mechanism includes a conical cover fixedly mounted inside the blower box above the cooling coil. An exhaust fan is installed inside the conical cover. A flow-guiding cone that is fixedly connected to the conical cover is inserted into the inner side of the cooling coil. An exhaust pipe that communicates with the conical cover is inserted into the air outlet of the blower box. By guiding the airflow through the flow-guiding cone and actively drawing air from the exhaust fan, a three-dimensional airflow path of "bottom air intake - spiral upward heat exchange - top exhaust" is constructed. This avoids the "short-circuit effect" and airflow collision problem of traditional unidirectional flow, significantly improving the airflow uniformity and ventilation efficiency on the surface of the cooling coil, thereby enhancing the heat exchange effect, reducing the internal liquid temperature of the cooling coil, ensuring the temperature stability of the cooling medium in the water tank, and indirectly improving the cooling quality and production efficiency of the injection mold.

[0007] Preferably, to prevent external dust from entering the interior of the air box, dust filters are provided at both the air inlet of the air box and the air outlet of the exhaust pipe. This physical filtration prevents external dust and impurities from entering the air box, avoiding a decrease in heat exchange efficiency due to dust accumulation on the cooling coil surface. It also reduces wear on components such as the exhaust fan and the airflow cone, extending the maintenance cycle and service life of the cooling device.

[0008] Preferably, the inlet and outlet ends of the cooling coil are respectively connected to a return pipe and a connecting pipe. Both the return pipe and the connecting pipe pass through the air box, and the outlet end of the connecting pipe is connected to the water tank. This constructs a closed-loop circulation channel for the cooling medium, allowing the cooling water in the water tank to be continuously cooled through the cooling coil. This ensures a stable low-temperature medium during mold cooling and also allows for pre-cooling of the water in the tank when the mold does not require cooling, improving system response speed and reducing waiting time.

[0009] Preferably, a water pump connected to the interior of the water tank is fixedly installed on the water tank, and the output end of the water pump is connected to the return water pipe through a circulation pipe. Through the active drive of the water pump, automatic circulation and cooling of the cooling water in the water tank is achieved, eliminating the need for real-time cooling of the mold. This allows for pre-emptive reduction of the water temperature in the tank, avoiding the problem of decreased cooling efficiency due to water accumulation and temperature rise, and enhancing the system's autonomy and stability.

[0010] Preferably, support legs are fixedly connected to the four corners of the bottom of the bellows, and anti-slip pads are fixedly connected to the lower ends of the support legs. The support legs raise the installation height of the bellows, preventing the bottom air inlet from being blocked by debris on the ground. At the same time, the anti-slip pads increase the friction between the device and the ground, preventing the equipment from shifting due to vibration or external forces during operation, thus ensuring the stability and safety of the cooling device.

[0011] Preferably, to accelerate the entry of cold air into the air box: a rotating shaft is rotatably connected to the bottom of the air box; fan blades are fixedly fitted onto the top of the rotating shaft inside the air box; a drive motor is fixedly installed at the bottom of the air box, and the output end of the drive motor is fixedly connected to the rotating shaft. By driving the fan blades to rotate, the drive motor actively delivers cold air into the air box, accelerating the air intake speed and compensating for the insufficient bottom air intake power caused by relying solely on the exhaust fan. This further increases the air velocity and flow rate within the air box, enhancing the heat exchange efficiency of the cooling coil.

[0012] This application constructs a three-dimensional airflow path of "bottom air intake - spiral upward heat exchange - top exhaust" by guiding the flow of the flow-guiding cone and actively drawing air from the exhaust fan. This avoids the "short-circuit effect" and airflow collision problem of traditional unidirectional flow, significantly improves the airflow uniformity and ventilation efficiency on the surface of the cooling coil, thereby enhancing the heat exchange effect, reducing the internal liquid temperature of the cooling coil, ensuring the temperature stability of the cooling medium in the water tank, and indirectly improving the cooling quality and production efficiency of the injection mold.

[0013] This application uses a drive motor to rotate the fan blades, actively delivering cold air into the air box, accelerating the air intake speed, compensating for the insufficient bottom air intake power caused by relying solely on the exhaust fan, further improving the air velocity and flow rate inside the air box, and enhancing the heat exchange efficiency of the cooling coil. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a cooling device for an injection molding machine mold;

[0015] Figure 2 for Figure 1 Structural sectional view;

[0016] Figure 3 for Figure 2 The top view of the structure in the image.

[0017] In the picture:

[0018] 1. Air box; 11. Support leg; 12. Anti-slip pad; 2. Water tank; 21. Water pump; 3. Cooling coil; 31. Return water pipe; 32. Connecting pipe; 4. Cooling mechanism; 41. Conical cover; 42. Exhaust fan; 43. Drain cone; 44. Exhaust duct; 5. Shaft; 51. Fan blade; 52. Drive motor. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0020] Example 1

[0021] This embodiment provides a cooling device for injection molding machine molds, such as... Figure 1-3 As shown, the cooling device includes a wind box 1 and a water tank 2 fixedly installed on the wind box 1. The inside of the wind box 1 is provided with a cooling coil 3 that communicates with the water tank 2 for cooling the cooling medium in the water tank 2. The wind box 1 is provided with a cooling mechanism 4 for cooling the cooling coil 3.

[0022] The cooling mechanism 4 includes a conical shroud 41 fixedly installed above the cooling coil 3 inside the air box 1. An exhaust fan 42 is installed inside the conical shroud 41. A guide cone 43, fixedly connected to the conical shroud 41, is inserted into the inner side of the cooling coil 3. An exhaust pipe 44, communicating with the conical shroud 41, is inserted into the air outlet of the air box 1. Through the guiding effect of the guide cone 43 and the active exhaust of the exhaust fan 42, a three-dimensional airflow path of "bottom air intake - spiral upward heat exchange - top exhaust" is constructed, avoiding the "short-circuit effect" and airflow collision problem of traditional unidirectional flow. This significantly improves the airflow uniformity and ventilation efficiency on the surface of the cooling coil 3, thereby enhancing the heat exchange effect, reducing the internal liquid temperature of the cooling coil 3, ensuring the temperature stability of the cooling medium in the water tank 2, and indirectly improving the cooling quality and production efficiency of the injection mold. After the exhaust fan 42 is started, a negative pressure is formed at the top through the conical cover 41, which causes the external cold air to enter from the air inlet at the bottom of the air box 1 and gradually spiral upward along the outer conical surface of the guide cone 43 (the conical structure of the guide cone 43 can guide the airflow to spread evenly). During the upward process, it comes into full contact with the cooling coil 3 and absorbs the heat emitted by it. The heated air is collected through the conical cover 41 and discharged through the exhaust pipe 44, forming a continuous convective heat exchange cycle.

[0023] To prevent external dust from entering the air box 1, dust filters are installed at both the air inlet of the air box 1 and the air outlet of the exhaust pipe 44. Through physical filtration, external dust and impurities are blocked from entering the air box 1, preventing a decrease in heat exchange efficiency due to dust accumulation on the surface of the cooling coil 3. This also reduces wear on components such as the exhaust fan 42 and the guide cone 43, extending the maintenance cycle and service life of the cooling device. The dust filter at the air inlet performs initial filtration of the cold air entering the air box 1, intercepting airborne dust particles; the dust filter at the air outlet of the exhaust pipe 44 prevents external debris from re-entering the air box 1 through the exhaust path. This bidirectional filtration ensures clean airflow inside the air box 1 and maintains the cleanliness of the surface of the cooling coil 3.

[0024] The inlet and outlet of the cooling coil 3 are connected to a return pipe 31 and a connecting pipe 32, respectively. Both the return pipe 31 and the connecting pipe 32 pass through the air box 1, and the outlet of the connecting pipe 32 is connected to the water tank 2. This creates a closed-loop circulation channel for the cooling medium, allowing the cooling water in the water tank 2 to be continuously cooled via the cooling coil 3. This ensures a stable low-temperature medium during mold cooling and also allows for pre-cooling of the water in the water tank 2 when the mold does not require cooling, improving system response speed and reducing waiting time. The high-temperature water after mold cooling flows into the cooling coil 3 through the return pipe 31, is cooled by heat exchange with the cold air in the air box 1, and then flows back to the water tank 2 through the connecting pipe 32, forming a circulation path of "mold → return pipe 31 → cooling coil 3 → connecting pipe 32 → water tank 2", achieving continuous temperature control of the cooling medium.

[0025] A water pump 21, which is connected to the interior of the water tank 2, is fixedly installed on the water tank 2. The output end of the water pump 21 is connected to the return water pipe 31 through a circulation pipe. Through the active drive of the water pump 21, the cooling water in the water tank 2 is automatically circulated and cooled, without relying on the real-time cooling needs of the mold. The water temperature in the water tank 2 can be reduced in advance, avoiding the problem of reduced cooling efficiency caused by water accumulation and temperature rise in the water tank 2, thus enhancing the autonomy and stability of the system. When the water in the mold does not need to be circulated temporarily, the valve is opened, and the water in the water tank 2 is pumped out by the water pump 21 and transported to the cooling coil 3 through the circulation pipe and the return water pipe 31. After heat exchange and cooling, the water flows back into the water tank 2, automatically circulating and cooling the water in the water tank 2 to reduce the temperature of the cooling water inside the water tank 2. When the mold needs to be cooled, the water pump 21 transports water to the mold. After cooling the mold, the water flows to the cooling coil 3 through the return water pipe 31. At this time, the exhaust fan 42 is turned on, and the cooling air enters from the bottom of the cooling coil 3, is guided by the guide cone 43 to rise gradually, and then is discharged from the conical cover 41 and the exhaust pipe 44, completing the heat exchange and thus reducing the temperature of the cooling water. After cooling, the cooling water is transported to the inside of the water tank 2 through the connecting pipe 32.

[0026] Support legs 11 are fixedly connected to the four corners of the bottom of the air box 1, and anti-slip pads 12 are fixedly connected to the lower ends of the support legs 11. The support legs 11 raise the installation height of the air box 1, preventing the bottom air inlet from being blocked by debris on the ground. At the same time, the anti-slip pads 12 increase the friction between the device and the ground, preventing the equipment from shifting due to vibration or external forces during operation, and ensuring the stability and safety of the cooling device. The support legs 11 are evenly distributed at the four corners of the bottom of the air box 1, raising the air box 1 and reserving sufficient air intake space for the bottom air inlet. The anti-slip pads 12 are made of anti-slip material (such as rubber), which increases the roughness of the contact surface to counteract the vibration reaction force generated by components such as the exhaust fan 42 and drive motor 52 during operation, ensuring that the device is placed stably.

[0027] Example 2

[0028] Unlike Embodiment 1, to accelerate the entry of cold air into the air box 1: a rotating shaft 5 is rotatably inserted into the bottom of the air box 1, and a fan blade 51 is fixedly sleeved on the top of the rotating shaft 5 inside the air box 1. A drive motor 52 is fixedly installed at the bottom of the air box 1, and the output end of the drive motor 52 is fixedly connected to the rotating shaft 5. By driving the fan blade 51 to rotate through the drive motor 52, cold air is actively delivered into the air box 1, accelerating the air intake speed and compensating for the insufficient bottom air intake power caused by relying solely on the exhaust fan 42 for ventilation. This further increases the air velocity and flow rate inside the air box 1, enhancing the heat exchange efficiency of the cooling coil 3. After the drive motor 52 starts, it drives the rotating shaft 5 and the fan blade 51 fixed on its top to rotate at high speed. The blades of the fan blade 51 push the external air in from the bottom air inlet of the air box 1 quickly, forming a bidirectional airflow drive of "pushing down and sucking up" with the top ventilation of the exhaust fan 42. This shortens the residence time of cold air in the air box 1, increases the ventilation volume per unit time, and allows the cooling coil 3 to come into contact with more fresh cold air, thereby improving the cooling rate.

[0029] The wiring diagrams of the water pump 21, exhaust fan 42, and drive motor 52 in this utility model are common knowledge in the field. Their working principles are known technologies. The appropriate model is selected according to actual use. Therefore, the control method and wiring layout of the water pump 21, exhaust fan 42, and drive motor 52 will not be explained in detail.

[0030] The control method of this application is through a controller. The control circuit of the controller can be implemented by a person skilled in the art through simple programming. The power supply is also common knowledge in the art. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0031] It should be noted that many of the standard parts used in this application are available on the market, while non-standard parts can be specially customized. The connection method used in this application is also a very common method in the mechanical field, and will not be described in detail here.

[0032] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A cooling device for injection molding machine mold, comprising a blower box (1) and a water tank (2) fixedly installed on the blower box (1), wherein the blower box (1) is provided with a cooling coil (3) communicating with the water tank (2) for cooling the cooling medium in the water tank (2), and the blower box (1) is provided with a cooling mechanism (4) for cooling the cooling coil (3); characterized in that The cooling mechanism (4) includes a conical shroud (41) fixedly installed inside the air box (1) above the cooling coil (3). An exhaust fan (42) is installed inside the conical shroud (41). A flow-guiding cone (43) fixedly connected to the conical shroud (41) is inserted into the inner side of the cooling coil (3). An exhaust pipe (44) connected to the conical shroud (41) is inserted into the air outlet of the air box (1).

2. An injection molding machine mold cooling apparatus as described in claim 1, wherein: The air inlet of the air box (1) and the air outlet of the exhaust pipe (44) are both equipped with dustproof nets.

3. An injection molding machine mold cooling apparatus as described in claim 1 wherein: The inlet and outlet of the cooling coil (3) are respectively connected to a return pipe (31) and a connecting pipe (32). The return pipe (31) and the connecting pipe (32) both pass through the air box (1), and the outlet of the connecting pipe (32) is connected to the water tank (2).

4. An injection molding machine mold cooling apparatus as defined in claim 3, wherein: A water pump (21) is fixedly installed on the water tank (2) and communicates with its interior. The output end of the water pump (21) is connected to the return water pipe (31) through a circulation pipe.

5. An injection molding machine mold cooling apparatus as described in claim 1 wherein: The bottom four corners of the bellows (1) are fixedly connected with support legs (11), and the lower end of the support legs (11) is fixedly connected with anti-slip pads (12).

6. An injection molding machine mold cooling apparatus as described in claim 1 and wherein: The bottom of the bellows (1) is rotatably connected to a rotating shaft (5). Inside the bellows (1) is a fan blade (51) fixedly sleeved on the top of the rotating shaft (5). The bottom of the bellows (1) is fixedly installed with a drive motor (52). The output end of the drive motor (52) is fixedly connected to the rotating shaft (5).

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