Cooling system and high-speed transmission device of injection molding machine

Abstract

This utility model relates to the field of injection molding machine technology, and particularly to a cooling system and a high-speed transmission device for injection molding machines. The cooling system includes a fan assembly, a heat dissipation assembly, and a guide duct connecting the fan assembly and the heat dissipation assembly. The fan assembly includes a fan housing and a centrifugal fan. The fan housing forms an air inlet chamber and has an air inlet opening and an air outlet opening. The centrifugal fan is fixed to the air outlet opening, and the air inlet side of the centrifugal fan communicates with the air inlet chamber. The heat dissipation assembly includes a heat dissipation box formed by a heat dissipation side plate, a heat dissipation cover plate, and a heat dissipation support plate, which houses the injection molding machine's screw drive assembly. The heat dissipation side plate and the heat dissipation cover plate have an air duct inlet and an air duct outlet. One end of the guide duct is connected to the air outlet side of the centrifugal fan, and the other end extends to the heat dissipation chamber and connects to the air duct inlet. This system achieves cooling of the injection molding machine's screw drive assembly and allows for quick disassembly and maintenance through modular design.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, and in particular to a cooling system and a high-speed transmission device for injection molding machines. Background Technology

[0002] During the operation of the high-speed transmission device in an injection molding machine, components such as the lead screw generate a large amount of heat due to high-speed rotation and friction. If this heat cannot be dissipated in time, the component temperature will rise, leading to thermal deformation. Traditional cooling methods mostly rely on natural heat dissipation, which has low heat dissipation efficiency and is difficult to meet the cooling requirements under high-speed transmission conditions. In addition, the lack of an effective circulating cooling system may lead to heat accumulation, further accelerating the performance degradation of transmission components and shortening the service life of the equipment.

[0003] Currently, the cooling method for high-speed transmission devices in injection molding machines is mainly natural heat dissipation. Natural heat dissipation relies on air convection and radiation, which has the advantages of simple structure and low cost, but its heat dissipation efficiency is low and cannot meet the cooling requirements under high-speed transmission conditions. In addition, the lack of effective circulating cooling methods can easily lead to heat accumulation, further accelerating the performance degradation of transmission components, affecting transmission accuracy and equipment stability, and shortening the service life of the equipment. Utility Model Content

[0004] The main purpose of this invention is to propose a cooling system for a high-speed transmission device of an injection molding machine, which aims to solve the heat dissipation problem of the high-speed transmission device of the injection molding machine during operation.

[0005] To achieve the above objectives, the present invention proposes a cooling system for a high-speed transmission device of an injection molding machine, comprising a fan assembly, a heat dissipation assembly, and a guide duct connecting the fan assembly and the heat dissipation assembly; The fan assembly includes a fan housing and at least one centrifugal fan. The fan housing forms an air inlet chamber inside. One side of the fan housing is provided with an air inlet opening that communicates with the air inlet chamber. At least one air outlet opening is provided on a side perpendicular to the side with the air inlet opening. The centrifugal fan is installed and fixed to the air outlet opening. The air inlet side of the centrifugal fan communicates with the air inlet chamber. The heat dissipation assembly includes a heat dissipation side plate, a heat dissipation cover plate, and a heat dissipation support plate. The heat dissipation side plate, the heat dissipation cover plate, and the heat dissipation support plate enclose a heat dissipation box for housing the injection molding machine screw drive assembly. A heat dissipation cavity is formed inside the heat dissipation box. The heat dissipation side plate and the heat dissipation cover plate are provided with an air duct inlet and an air duct outlet. The air duct outlet connects the heat dissipation cavity with the external environment. One end of the air guide duct is connected to the air outlet side of the centrifugal fan, and the other end extends to the heat dissipation cavity and is connected to the air duct inlet.

[0006] In one embodiment, the fan assembly further includes a fan shroud and a fan cover; The fan cover and the fan cover together form an air outlet cover. The air outlet cover is located on the air outlet side of the centrifugal fan and is fixedly connected to the fan housing and the centrifugal fan. The side of the air outlet cover near the centrifugal fan is provided with a first guide port that communicates with the air outlet side of the centrifugal fan, and the side of the air outlet cover away from the centrifugal fan is provided with a second guide port that communicates with the guide duct.

[0007] In one embodiment, the heat dissipation assembly further includes an air inlet shroud; The air inlet shroud is located at the air duct inlet and is fixedly connected to the heat dissipation box; one side of the air inlet shroud is provided with a third guide port communicating with the air duct inlet, and the side of the air inlet shroud away from the air duct inlet is provided with a fourth guide port communicating with the guide air duct.

[0008] In one embodiment, a quick-connect hose connector is provided at one end of the guide duct that connects to the second guide port. One end of the quick-connect hose connector is interference-fitted with the guide duct, and the other end is inserted and fixed to the second guide port. A right-angle hose connector is provided at one end of the guide duct that connects to the fourth guide port. One end of the right-angle hose connector is interference-fitted with the guide duct, and the other end is inserted and fixed to the fourth guide port.

[0009] In one embodiment, the heat dissipation side plate and the heat dissipation cover plate are fixedly connected to form the side wall and bottom wall of the heat dissipation box, and the heat dissipation support plate is fixedly connected to the heat dissipation side plate and the heat dissipation cover plate to form the top wall of the heat dissipation box; the top wall and bottom wall of the heat dissipation box are provided with screw through holes.

[0010] In one embodiment, the heat dissipation assembly includes a first air duct outlet, a second air duct outlet, and a third air duct outlet, which are distributed circumferentially on one end of the side wall of the heat dissipation box near the bottom wall of the heat dissipation box; the first air duct outlet and the second air duct outlet are opened on the heat dissipation side plate, and the third air duct outlet is opened on the heat dissipation cover plate. The heat dissipation assembly further includes a first guide shroud, a second guide shroud, and a third guide shroud that guide the airflow discharged through the air duct outlet to the outer surface of the side wall of the heat dissipation box; the first guide shroud, the second guide shroud, and the third guide shroud are respectively covered on the first air duct outlet, the second air duct outlet, and the third air duct outlet, and are fixedly connected to the heat dissipation box.

[0011] In one embodiment, an air filter is provided at the air inlet of the fan housing, and the air filter is detachably connected to the fan housing.

[0012] In one embodiment, the fan assembly includes a first centrifugal fan and a second centrifugal fan. The fan housing is provided with a first air outlet hood and a second air outlet hood, and the heat dissipation housing is provided with a first air inlet hood and a second air inlet hood, as well as a corresponding first air duct inlet and a second air duct inlet. The first centrifugal fan is connected to the first air outlet hood, and the second centrifugal fan is connected to the second air outlet hood. The first air inlet hood and the first air duct inlet are located on the heat dissipation side plate, and the second air inlet hood and the second air duct inlet are located on the heat dissipation cover plate. The cooling system of the high-speed transmission device of the injection molding machine includes a first air duct group and a second air duct group. The first air duct group connects the first air outlet hood and the first air inlet hood; the second air duct group connects the second air outlet hood and the second air inlet hood.

[0013] In one embodiment, the first duct group and the second duct group each include two of the aforementioned air guide ducts; the first air outlet hood and the second air outlet hood are each provided with two of the aforementioned second air guide ports, and the first air inlet hood and the second air inlet hood are each provided with two of the aforementioned fourth air guide ports.

[0014] This utility model also proposes a high-speed transmission device for an injection molding machine, comprising: The cooling system for the lead screw drive assembly of the injection molding machine and the aforementioned high-speed transmission device of the injection molding machine; The injection molding machine screw drive assembly is housed in the heat dissipation cavity and fixedly connected to the heat dissipation box; the injection molding machine screw drive assembly includes a drive screw and a drive nut, the drive screw passes through the screw through holes on the top and bottom walls of the heat dissipation box, and cooperates with the drive nut to form a helical drive pair.

[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. Through the synergistic action of the fan and heat dissipation components, highly efficient forced air cooling of the injection molding machine's lead screw drive assembly is achieved. Airflow enters the air inlet chamber through the inlet opening, is pressurized and accelerated by the centrifugal fan, and is directionally delivered along the guide duct to the internal air duct of the heat dissipation box. It flows evenly across the heating area on the lead screw surface, forming a continuous axial cooling flow field and reducing the temperature of the lead screw assembly. The through-flow convection design allows hot air to be quickly discharged from the air duct outlet, preventing heat backflow and accumulation, thus improving heat dissipation efficiency and system stability. It adapts to the long-term, high-load operation requirements of the injection molding machine's high-speed transmission device, effectively ensuring the accuracy and lifespan of the transmission device. The entire cooling system utilizes a modular design for quick disassembly and maintenance.

[0016] 2. By setting up air guides corresponding to the first air duct outlet, the second air duct outlet, and the third air duct outlet respectively, the airflow is guided to flow along the side wall surface of the heat dissipation box to achieve secondary heat dissipation and improve the overall heat dissipation efficiency.

[0017] 3. A removable air filter is installed at the air inlet to prevent external dust from entering the cooling system of the high-speed transmission device of the injection molding machine, thus avoiding the accumulation of impurities that affect heat dissipation efficiency. After long-term operation, it can be quickly removed for cleaning or replacement using clips or screws, making maintenance simple.

[0018] 4. The symmetrical layout of the dual fans and dual ducts ensures that the cooling airflow is evenly distributed in the heat dissipation cavity, further reducing the working temperature of the injection molding machine's screw drive assembly. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the structure of an embodiment of the cooling system of the high-speed transmission device for an injection molding machine provided by this utility model; Figure 2 Another schematic diagram of the cooling system of the high-speed transmission device for injection molding machines provided by this utility model; Figure 3 A schematic diagram of the structure of a fan assembly of the cooling system of a high-speed transmission device for an injection molding machine provided by this utility model; Figure 4 A schematic diagram of the structure of a heat dissipation component of the cooling system of the high-speed transmission device for injection molding machines provided by this utility model.

[0021] Explanation of icon numbers: label name label name 100 wind turbine components 230 Heat dissipation plate 110 Fan housing 240 Duct outlet 120 centrifugal fan 250 Air intake cover 121 First centrifugal fan 251 First air intake cover 122 Second centrifugal fan 252 Second air intake shroud 130 Air vent 260 First fairing 131 Fan cover 270 Second deflector 132 Fan cover 280 Third fairing 133 First air vent 300 air diversion duct 134 Second air vent 310 quick hose connector 140 Air filter 320 Right angle flexible hose connector 200 Heat dissipation components 330 First Air Duct Group 210 Heat dissipation side plate 340 Second air duct group 220 Heat sink cover 400 Injection molding machine screw drive assembly The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] 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 scope of protection of the present utility model.

[0023] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0024] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0025] Please see Figures 1 to 4 This utility model provides a cooling system for a high-speed transmission device of an injection molding machine: In one embodiment of the present invention, the cooling system of the high-speed transmission device of the injection molding machine mainly consists of a fan assembly (100), a heat dissipation assembly (200), and a guide duct (300) connecting the fan assembly (100) and the heat dissipation assembly (200).

[0026] The fan assembly (100) provides a continuous and stable airflow. Its outlet is connected to the air duct inlet of the heat dissipation assembly (200) via a guide duct (300) to ensure efficient delivery of cooling airflow to the lead screw assembly of the transmission device. The fan assembly (100) includes a fan housing (110) and at least one centrifugal fan (120). The fan housing (110) forms an air inlet chamber inside. One side of the fan housing (110) is provided with an air inlet opening that communicates with the air inlet chamber. At least one air outlet opening is provided on the side perpendicular to the side with the air inlet opening. The centrifugal fan (120) is installed and fixed to the air outlet opening. The air inlet side of the centrifugal fan (120) is connected to the air inlet chamber. The fan housing (110) serves two purposes: firstly, it fixes and supports the centrifugal fan (120), enabling the centrifugal fan (120) to be installed stably and maintain operational stability; secondly, it achieves uniform airflow distribution through the air inlet chamber, improving air intake efficiency and reducing turbulence and noise. When the centrifugal fan (120) is running, it accelerates the air in the air inlet chamber and discharges it tangentially, forming a high-speed airflow that is delivered to the heat dissipation assembly (200) through the guide duct (300). The centrifugal fan (120) is used to pressurize the airflow and discharge it tangentially, forming a stable high-pressure airflow to enhance the cooling effect. The air outlet direction of the centrifugal fan (120) is aligned with the axis of the guide duct (300) to ensure efficient airflow introduction and reduce flow loss.

[0027] A heat dissipation assembly (200) is used to dissipate heat generated by the high-speed transmission device of the injection molding machine. The heat dissipation assembly (200) includes a heat dissipation side plate (210), a heat dissipation cover plate (220), and a heat dissipation support plate (230). The heat dissipation side plate (210), the heat dissipation cover plate (220), and the heat dissipation support plate (230) enclose a heat dissipation box housing the lead screw transmission assembly (400) of the injection molding machine. A heat dissipation cavity is formed inside the heat dissipation box housing. The heat dissipation side plate (210) and the heat dissipation cover plate (220) are provided with an air duct inlet and an air duct outlet (240). The air duct outlet (240) connects the heat dissipation cavity to the external environment. The heat dissipation box housing serves to accommodate the lead screw assembly and form a heat dissipation space. On the other hand, the internal air duct structure guides the cooling airflow evenly across the surface of the lead screw, improving the heat dissipation efficiency. The cooling airflow in the heat dissipation cavity is evenly distributed along the axis of the lead screw, effectively covering the heat-generating area. The air duct outlet (240) is located on the side of the heat dissipation box away from the air duct inlet, forming a through convection to improve heat exchange efficiency. The air duct outlet (240) is connected to the external environment, so that the heated airflow can be discharged in time to avoid heat accumulation.

[0028] One end of the guide duct (300) is connected to the outlet side of the centrifugal fan (120), and the other end extends to the heat dissipation cavity and connects to the air duct inlet. This ensures that the cooling airflow generated by the centrifugal fan (120) is directly introduced into the air duct inside the heat dissipation box through the guide duct (300). The guide duct (300) is made of a high-temperature resistant and anti-aging flexible material, which has good sealing properties to prevent airflow leakage, while also adapting to minor displacements and vibrations during equipment operation. After the airflow enters the heat dissipation cavity, it flows along the screw axis and is discharged to the outside of the heat dissipation box through the air duct outlet (240), thereby removing the frictional heat generated under high-speed operation and improving the overall heat dissipation efficiency.

[0029] In the technical solution provided in this embodiment, efficient forced air cooling of the injection molding machine's lead screw drive assembly (400) is achieved through the synergistic effect of the fan assembly (100) and the heat dissipation assembly (200). After the airflow enters the air inlet chamber through the air inlet opening, it is pressurized and accelerated by the centrifugal fan (120) and directionally transported to the internal air duct of the heat dissipation box along the guide air duct (300). It flows evenly through the heating area on the surface of the lead screw, forming a continuous axial cooling flow field and reducing the temperature of the lead screw assembly. The through-flow convection design allows hot air to be quickly discharged from the air duct outlet (240), avoiding heat backflow and accumulation, and improving heat dissipation efficiency and system stability. It adapts to the working conditions of long-term high-load operation of the injection molding machine's high-speed transmission device, effectively ensuring the accuracy and life of the transmission device. The entire cooling system achieves rapid disassembly and maintenance through modular design.

[0030] Optionally, the fan assembly (100) further includes a fan shroud (131) and a fan cover (132). The fan shroud (131) and the fan cover (132) together form an air outlet shroud (130). The air outlet shroud (130) is located on the air outlet side of the centrifugal fan (120) and is fixedly connected to the fan housing (110) and the centrifugal fan (120). The side of the air outlet shroud (130) closest to the centrifugal fan (120) has a first guide port communicating with the air outlet side of the centrifugal fan (120), and the side of the air outlet shroud (130) away from the centrifugal fan (120) has a second guide port communicating with the guide duct (300). The fan shroud (131) and fan cover (132) are detachably connected to form a closed air outlet shroud (130), which effectively constrains and guides the high-speed airflow output by the centrifugal fan (120) to the guide duct (300), ensuring that the airflow is delivered to the heat dissipation cavity without leakage or turbulence. A screw hole is provided circumferentially along the first guide port for fixing the air outlet shroud (130) to the centrifugal fan (120) and the fan housing (110) with fasteners, ensuring the stability of the connection structure. The air outlet side of the centrifugal fan (120) includes a fan outlet and screw holes that correspond to the screw holes circumferentially aligned with the first guide port. The shape and size of the first guide port match the fan outlet of the centrifugal fan (120), ensuring smooth airflow into the guide duct (300) and reducing flow resistance.

[0031] The heat dissipation assembly (200) also includes an air inlet shroud (250). The air inlet shroud (250) is located at the air duct inlet and is fixedly connected to the heat dissipation box. One side of the air inlet shroud (250) is provided with a third guide port communicating with the air duct inlet, and the side of the air inlet shroud (250) away from the air duct inlet is provided with a fourth guide port communicating with the guide air duct (300). The third guide port of the air inlet shroud (250) is provided with screw holes distributed around its circumference, which are used to detachably fix the air inlet shroud (250) to the heat dissipation box with fasteners to ensure the sealing of the air intake path and the structural stability. The shape and size of the third guide port match the air duct inlet to ensure that the airflow is smoothly introduced into the heat dissipation cavity and reduce eddies and resistance losses. The detachable connection between the air inlet shroud (250) and the heat dissipation box facilitates later maintenance and cleaning, while maintaining the sealing of the overall structure. The fourth guide port is used to connect to the guide air duct (300) to guide the cooling airflow into the heat dissipation cavity. This design aims to improve airflow uniformity and overall system sealing performance. All connections utilize screw-hole fasteners to ensure assembly accuracy and structural reliability.

[0032] A quick-connect hose connector (310) is fitted onto one end of the guide duct (300) that connects to the second guide port. One end of the quick-connect hose connector (310) is interference-fitted with the guide duct (300), and the other end is inserted and fixed to the second guide port. A right-angle hose connector (320) is fitted onto one end of the guide duct (300) that connects to the fourth guide port. One end of the right-angle hose connector (320) is interference-fitted with the guide duct (300), and the other end is inserted and fixed to the fourth guide port. An insertion ring extends axially from the end of the quick-connect hose connector (310) that is inserted into the second guide port. The outer diameter of the insertion ring of the quick-connect hose connector (310) is the same as the inner diameter of the tube body of the quick-connect hose connector (310). The insertion ring of the quick-connect hose connector (310) is interference-fitted with the inner wall of the second guide port. The tube body of the quick-connect hose connector (310) is then tightly fitted with the air outlet hood (130) to ensure the airtightness of the connection. The guide duct (300) and the air outlet hood (130) are connected by a quick-connect hose coupling (310) to achieve rapid installation and disassembly while ensuring the sealing and reliability of the connection. Similarly, the end of the right-angle hose coupling (320) that is inserted into the fourth guide port has an axially extending insertion ring. The outer diameter of the insertion ring of the right-angle hose coupling (320) is consistent with the inner diameter of the hose body of the right-angle hose coupling (320). The insertion ring of the right-angle hose coupling (320) is interference-fitted with the inner wall of the fourth guide port. The hose body of the right-angle hose coupling (320) is then tightly fitted with the air inlet hood (250) to ensure the airtightness of the connection. The guide duct (300) and the air inlet hood (250) are connected by a right-angle hose coupling (320) to achieve rapid installation and disassembly while ensuring the sealing and reliability of the connection. In this embodiment, the heat dissipation side plate (210) and the heat dissipation cover plate (220) are fixedly connected to form the side wall and bottom wall of the heat dissipation box. The heat dissipation support plate (230) is welded and fixed to the side of the heat dissipation side plate (210) and the side of the heat dissipation cover plate (220) away from the bottom wall of the heat dissipation box to form the top wall of the heat dissipation box. The top wall and bottom wall of the heat dissipation box are provided with screw through holes. The heat dissipation side plate (210) has a fixing part extending radially on both sides parallel to the axial direction. The fixing part of the heat dissipation side plate (210) is strip-shaped and has through holes for connecting with the heat dissipation cover plate (220) by screws. The heat dissipation cover plate (220) has matching through holes at corresponding positions. The heat dissipation side plate (210) and the heat dissipation cover plate (220) are firmly connected by the cooperation of screws and nuts to ensure the stability of the box structure. The heat dissipation side plate (210) is attached to the bottom wall of the heat dissipation cover plate (220) and is fastened with screws to form the bottom wall of the heat dissipation box. The bottom wall of the heat dissipation box is perpendicular to the side wall, and the heat dissipation support plate (230) is the top wall of the heat dissipation box and is parallel to the bottom wall of the heat dissipation box.

[0033] In one feasible embodiment, the radial cross-section of the heat sink is D-shaped, wherein the curved side of the D-shape is formed by a heat dissipation side plate (210), and the straight side is formed by a heat dissipation cover plate (220). The purpose of this design is to form a channel that facilitates smooth airflow and improves heat dissipation efficiency.

[0034] Furthermore, the heat dissipation assembly (200) includes a first air duct outlet, a second air duct outlet, and a third air duct outlet, which are distributed circumferentially on one end of the side wall of the heat dissipation box near the bottom wall of the heat dissipation box. The first and second air duct outlets are located on the heat dissipation side plate (210), and the third air duct outlet is located on the heat dissipation cover plate (220). The heat dissipation assembly (200) also includes a first air guide shroud (260), a second air guide shroud (270), and a third air guide shroud (280) that guide the airflow discharged through the air duct outlet (240) to the outer surface of the side wall of the heat dissipation box. The first air guide shroud (260), the second air guide shroud (270), and the third air guide shroud (280) are respectively covered on the first air duct outlet, the second air duct outlet, and the third air duct outlet, and are fixedly connected to the heat dissipation box. The first air guide shroud (260), the second air guide shroud (270), and the third air guide shroud (280) can be fixedly connected to the heat dissipation box by screws. By setting up air guides corresponding to the first, second, and third air duct outlets respectively, airflow is guided to flow along the side wall surface of the heat dissipation box to achieve secondary heat dissipation and improve the overall heat dissipation efficiency.

[0035] In one feasible embodiment, an air filter (140) is provided at the air inlet of the fan housing (110), and the air filter (140) is detachably connected to the fan housing (110). This application does not specify a particular connection method between the air filter (140) and the fan housing (110). Detachable connection methods such as snap-fit ​​connection, screw connection, or magnetic connection can be used. A solution that facilitates disassembly and assembly can be selected based on actual maintenance needs, ensuring the filter is securely installed while facilitating regular cleaning and replacement, keeping the air duct clean, and improving system stability and heat dissipation efficiency. By providing a detachable air filter (140) at the air inlet, external dust is prevented from entering the cooling system of the high-speed transmission device of the injection molding machine, avoiding the accumulation of impurities that could affect heat dissipation efficiency. After long-term operation, it can be quickly removed for cleaning or replacement using snap-fit ​​or screws, making maintenance simple. This extends the service life of the centrifugal fan (120) and the injection molding machine screw drive assembly (400), ensuring the continuous and stable operation of the injection molding machine's high-power device in complex industrial environments and improving the overall reliability and energy efficiency of the equipment.

[0036] Optionally, the fan assembly (100) includes a first centrifugal fan (121) and a second centrifugal fan (122). The fan housing (110) is provided with a first air outlet hood (133) and a second air outlet hood (134). The heat dissipation housing is provided with a first air inlet hood (251) and a second air inlet hood (252), as well as a first air duct inlet and a second air duct inlet. The first centrifugal fan (121) is connected to the first air outlet hood (133), and the second centrifugal fan (122) is connected to the second air outlet hood (134). The first air inlet hood (251) and the first air duct inlet are located on the heat dissipation side plate (210), and the second air inlet hood (252) and the second air duct inlet are located on the heat dissipation cover plate (220). The cooling system of the high-speed transmission device of the injection molding machine includes a first air duct group (330) and a second air duct group (340). The first air duct group (330) connects the first air outlet hood (133) and the first air inlet hood (251); the second air duct group (340) connects the second air outlet hood (134) and the second air inlet hood (252). Through the symmetrical layout of the dual fans and dual air duct groups, the cooling airflow is evenly distributed in the heat dissipation cavity, further reducing the working temperature of the injection molding machine's screw transmission assembly (400). At the same time, the first centrifugal fan (121) and the second centrifugal fan (122) are independently controlled and can be flexibly started and stopped according to the load, further optimizing energy consumption. The air duct structure is designed by fluid dynamics simulation to reduce airflow resistance and improve ventilation efficiency. The overall system has good maintainability and environmental adaptability, and is suitable for complex working conditions such as high temperature and dust, ensuring the long-term stable operation of the high-speed transmission device of the injection molding machine.

[0037] Furthermore, both the first duct assembly (330) and the second duct assembly (340) include two guide ducts (300). The first air outlet hood (133) and the second air outlet hood (134) are each provided with two corresponding second guide ports, and the first air inlet hood (251) and the second air inlet hood (252) are each provided with two corresponding fourth guide ports. The purpose of this design is to guide the cooling airflow before it enters the heat dissipation cavity, further optimizing the uniformity and continuity of airflow distribution within the duct, avoiding the formation of local eddies or stagnant zones, thereby improving heat dissipation efficiency. The design of the double guide ports guides the airflow to cover the heat-generating parts of the screw drive assembly, further enhancing the convective heat transfer effect.

[0038] This utility model also proposes a high-speed transmission device for an injection molding machine. The high-speed transmission device includes a lead screw drive assembly (400) and a cooling system. The specific structure of the cooling system is as described in the above embodiments. Since this high-speed transmission device adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here. The lead screw drive assembly (400) is housed in a heat dissipation cavity and fixedly connected to the heat dissipation box. The lead screw drive assembly (400) includes a drive screw and a drive nut. The drive screw passes through screw holes on the top and bottom walls of the heat dissipation box, and cooperates with the drive nut to form a helical transmission pair.

[0039] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A cooling system for a high-speed transmission device of an injection molding machine, characterized in that, It includes a fan assembly (100), a heat dissipation assembly (200), and a guide duct (300) connecting the fan assembly (100) and the heat dissipation assembly (200). The fan assembly (100) includes a fan housing (110) and at least one centrifugal fan (120). The fan housing (110) forms an air inlet chamber inside. One side of the fan housing (110) is provided with an air inlet opening that communicates with the air inlet chamber. At least one air outlet opening is provided on a side perpendicular to the side where the air inlet opening is provided. The centrifugal fan (120) is installed and fixed to the air outlet opening. The air inlet side of the centrifugal fan (120) communicates with the air inlet chamber. The heat dissipation assembly (200) includes a heat dissipation side plate (210), a heat dissipation cover plate (220), and a heat dissipation support plate (230). The heat dissipation side plate (210), the heat dissipation cover plate (220), and the heat dissipation support plate (230) enclose a heat dissipation box for housing the injection molding machine screw drive assembly (400). A heat dissipation cavity is formed inside the heat dissipation box. The heat dissipation side plate (210) and the heat dissipation cover plate (220) are provided with an air duct inlet and an air duct outlet (240). The air duct outlet (240) connects the heat dissipation cavity to the external environment. One end of the air duct (300) is connected to the air outlet side of the centrifugal fan (120), and the other end extends to the heat dissipation cavity and is connected to the air duct inlet.

2. The cooling system of the high-speed transmission device of the injection molding machine as described in claim 1, characterized in that, The fan assembly (100) also includes a fan shroud (131) and a fan cover (132). The fan cover (131) and the fan cover (132) enclose each other to form an air outlet cover (130). The air outlet cover (130) is located on the air outlet side of the centrifugal fan (120) and is fixedly connected to the fan housing (110) and the centrifugal fan (120). The side of the air outlet cover (130) close to the centrifugal fan (120) is provided with a first guide port that communicates with the air outlet side of the centrifugal fan (120), and the side of the air outlet cover (130) away from the centrifugal fan (120) is provided with a second guide port that communicates with the guide duct (300).

3. The cooling system of the high-speed transmission device of the injection molding machine as described in claim 2, characterized in that, The heat dissipation assembly (200) also includes an air intake shroud (250); The air inlet shroud (250) is located at the air duct inlet and is fixedly connected to the heat dissipation box; one side of the air inlet shroud (250) is provided with a third guide port that communicates with the air duct inlet, and the side of the air inlet shroud (250) away from the air duct inlet is provided with a fourth guide port that communicates with the guide air duct (300).

4. The cooling system of the high-speed transmission device of the injection molding machine as described in claim 3, characterized in that, The end of the air duct (300) connected to the second air duct is fitted with a quick hose connector (310). One end of the quick hose connector (310) is interference-fitted with the air duct (300), and the other end is inserted and fixed to the second air duct. The end of the air duct (300) connected to the fourth air duct is fitted with a right-angle hose connector (320). One end of the right-angle hose connector (320) is interference-fitted with the air duct (300), and the other end is inserted and fixed to the fourth air duct.

5. The cooling system of the high-speed transmission device of the injection molding machine as described in claim 1, characterized in that, The heat dissipation side plate (210) and the heat dissipation cover plate (220) are fixedly connected to form the side wall and bottom wall of the heat dissipation box. The heat dissipation support plate (230) is welded and fixed to the side of the heat dissipation side plate (210) and the side of the heat dissipation cover plate (220) away from the bottom wall of the heat dissipation box to form the top wall of the heat dissipation box. The top wall and bottom wall of the heat dissipation box are provided with screw through holes.

6. The cooling system of the high-speed transmission device of the injection molding machine as described in claim 5, characterized in that, The heat dissipation assembly (200) includes a first air duct outlet, a second air duct outlet, and a third air duct outlet. The first air duct outlet, the second air duct outlet, and the third air duct outlet are distributed circumferentially on one end of the side wall of the heat dissipation box near the bottom wall of the heat dissipation box. The first air duct outlet and the second air duct outlet are opened on the heat dissipation side plate (210), and the third air duct outlet is opened on the heat dissipation cover plate (220). The heat dissipation assembly (200) further includes a first air guide shroud (260), a second air guide shroud (270), and a third air guide shroud (280) that guide the airflow discharged through the air duct outlet (240) to the outer surface of the side wall of the heat dissipation box; the first air guide shroud (260), the second air guide shroud (270), and the third air guide shroud (280) are respectively covered on the first air duct outlet, the second air duct outlet, and the third air duct outlet, and are fixedly connected to the heat dissipation box.

7. The cooling system of the high-speed transmission device of the injection molding machine as described in claim 1, characterized in that, An air filter (140) is provided at the air inlet of the fan housing (110), and the air filter (140) is detachably connected to the fan housing (110).

8. The cooling system of the high-speed transmission device of the injection molding machine as described in claim 3, characterized in that, The fan assembly (100) includes a first centrifugal fan (121) and a second centrifugal fan (122). The fan housing (110) is provided with a first air outlet hood (133) and a second air outlet hood (134). The heat dissipation housing is provided with a first air inlet hood (251) and a second air inlet hood (252), as well as a first air duct inlet and a second air duct inlet. The first centrifugal fan (121) is connected to the first air outlet hood (133), and the second centrifugal fan (122) is connected to the second air outlet hood (134). The first air inlet hood (251) and the first air duct inlet are located on the heat dissipation side plate (210), and the second air inlet hood (252) and the second air duct inlet are located on the heat dissipation cover plate (220). The cooling system of the high-speed transmission device of the injection molding machine includes a first air duct group (330) and a second air duct group (340). The first air duct group (330) connects the first air outlet hood (133) and the first air inlet hood (251); the second air duct group (340) connects the second air outlet hood (134) and the second air inlet hood (252).

9. The cooling system of the high-speed transmission device of the injection molding machine as described in claim 8, characterized in that, The first duct group (330) and the second duct group (340) each include two guide ducts (300); the first air outlet hood (133) and the second air outlet hood (134) are each provided with two second guide ports, and the first air inlet hood (251) and the second air inlet hood (252) are each provided with two fourth guide ports.

10. A high-speed transmission device for an injection molding machine, characterized in that, include: The injection molding machine screw drive assembly (400) and the cooling system of the high-speed transmission device of the injection molding machine according to any one of claims 1 to 9; The injection molding machine screw drive assembly (400) is housed in the heat dissipation cavity and fixedly connected to the heat dissipation box; the injection molding machine screw drive assembly (400) includes a drive screw and a drive nut, the drive screw passes through the screw through holes on the top and bottom walls of the heat dissipation box, and cooperates with the drive nut to form a helical drive pair.

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