Homocentric-square-shaped cooling device for injection mold

Abstract

The invention belongs to the technical field of injection mold production devices, and particularly relates to a concentric-square-shaped cooling device for an injection mold, which comprises a mold and a concentric-square-shaped cooling mechanism. A forming groove is formed in the upper surface of the mold and used for injection molding. The concentric-square-shaped cooling mechanism comprises a concentric-square-shaped cooling groove, a heat dissipation box, a cooling box and a related pipeline system. Cooling liquid enters through the water pump and the water inlet pipe, absorbs heat and then is discharged through the water discharging pipe. A power assembly composed of copper blades and a rotary drum is arranged in the drainage pipe, absorbs high-temperature heat and drives the heat dissipation system. The heat conduction rod, the first fan and the cooling fins form a first cooling assembly, and heat is blown into the waste heat recycling box to be used for heating or raw material preheating. The problems that in the prior art, a device is low in heat dissipation efficiency, initial heat is wasted, and a heat dissipation fan needs an external power source are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of injection mold production devices, and in particular relates to a return cooling device for an injection mold. Background Art

[0002] The injection mold's return cooling device is an important device used to control the mold temperature during the injection molding process. By setting up cooling channels inside the mold, the coolant circulates to remove the heat from the molten plastic, thereby achieving rapid cooling and solidification of the injection molded product. A reasonable cooling device can not only shorten the molding cycle and improve production efficiency, but also ensure the temperature stability of the injection molded product, reduce deformation, increase strength and toughness, and reduce thermal stress. In the prior art, the cooling device usually achieves coolant circulation and heat dissipation through a cooling water tank, a heat dissipation water tank, and related piping systems, and is combined with auxiliary heat dissipation components such as fans to improve heat dissipation efficiency.

[0003] After searching, the Chinese patent application number 2018107785294 discloses a return cooling device for injection molds. By setting up double return cooling grooves, separate cooling water tanks and heat dissipation water tanks, nozzles and heat dissipation fans in the movable mold and the fixed mold, the circulating cooling and temperature control of the cooling water are achieved.

[0004] However, the above device has the following defects: its heat dissipation mainly relies on the water mist formed by the cooling fan and the nozzle, the heat dissipation efficiency is limited by the single heat dissipation mechanism, and the cooling speed needs to be further improved; the initial heat of the cooling return water is not effectively recycled, resulting in energy waste; in addition, the cooling fan relies on an external power supply, which increases energy consumption and operating costs. Summary of the Invention

[0005] The purpose of the present invention is to provide a mold return cooling device for an injection mold to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a return cooling device for an injection mold, comprising a mold and a cooling mechanism, wherein the upper surface of the mold is provided with a molding groove; The cooling mechanism includes a circular cooling groove opened inside the mold and arranged around the periphery of the forming groove, and also includes a heat dissipation box and a cooling box arranged outside the mold, the right side of the front end of the circular cooling groove is connected with a water inlet pipe, the input end of the water inlet pipe is connected with a water pump, the input end of the water pump is connected with a water extraction pipe, and the input end of the water extraction pipe extends into the cooling box, the right side of the front end of the circular cooling groove is connected with a drain pipe, and the output end of the drain pipe extends into the heat dissipation box and is fixedly connected to a horizontal pipe, the bottom end of the horizontal pipe is array-mounted with an atomizing nozzle, the bottom end of the heat dissipation box is connected with a guide pipe, and the output end of the guide pipe is connected to the interior of the cooling box; A power assembly is provided inside the drainage pipe, a first exhaust pipe is provided at the left end of the power assembly, a first heat dissipation assembly is provided inside the first exhaust pipe, and a second heat dissipation assembly is transmission-connected to the right end of the power assembly.

[0007] As a preferred solution of the return cooling device for injection molds described in the present invention, the power assembly includes a mounting frame fixedly mounted at the input end of the drain pipe, a rotating drum is rotatably connected at the center of the mounting frame, and a plurality of blades are mounted in a circular array on the outer surface of the rotating drum.

[0008] As a preferred solution of the circular cooling device for injection molds described in the present invention, the first heat dissipation component includes a heat-conducting rod fixedly installed at the center of the rotating drum, the left end of the heat-conducting rod passes through the mounting frame and extends into the first exhaust pipe, where it is fixedly connected to a first fan and a heat sink, and the heat sink is arranged at the exhaust port of the first fan.

[0009] As a preferred solution of the circular cooling device for injection molds described in the present invention, the initial ends of the plurality of blades extend to the interior of the rotating drum and contact the outer surface of the heat conducting rod, and the blades are made of copper.

[0010] As a preferred solution of the circular cooling device for injection molds described in the present invention, the heat sink is provided in plurality, and the plurality of heat sink circular arrays are respectively provided on the outer surface of the left side of the heat conducting rod, and through holes are provided inside the plurality of heat sinks.

[0011] As a preferred solution of the return cooling device for injection molds described in the present invention, an air guide hole is provided on the outer side of the first fan, and an input end of the air guide hole is connected to the outside world.

[0012] As a preferred solution of the circular cooling device for injection molds described in the present invention, the second heat dissipation component includes a rotating shaft fixedly connected to the right end of the rotating cylinder, the right end of the rotating shaft passes through the right side wall of the mounting frame and extends to the outside thereof and is fixedly connected to a driving wheel, the outer surface of the driving wheel is meshed with a transmission belt, the inner side of the bottom end of the transmission belt is meshed with a driven wheel, the left end of the driven wheel is fixedly connected to a second fan through a transmission shaft, and the second fan is arranged in the right side wall of the heat dissipation box.

[0013] As a preferred solution of the circular cooling device for injection molds described in the present invention, a guide groove is opened on the left side inside the heat dissipation box, and the guide groove and the second fan are located on the same plane, and the output end of the guide groove is connected to the second exhaust pipe.

[0014] As a preferred solution of the return cooling device for injection molds described in the present invention, a filter is provided inside the heat dissipation box and below the second fan and the guide groove.

[0015] As a preferred solution of the return cooling device for injection molds described in the present invention, the output end of the first exhaust pipe is connected to a waste heat recovery box, and the output end of the second exhaust pipe is also connected to the interior of the waste heat recovery box.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention achieves a secondary heat dissipation mechanism by installing a power assembly consisting of copper blades and a rotating drum in the drain pipe, combining a heat dissipation assembly consisting of a heat conducting rod, a first fan, and heat sinks, and the synergistic effect of an atomizing nozzle and a filter. The copper blades efficiently absorb the initial heat of the coolant and quickly transfer it through the heat conducting rod. The first fan accelerates heat dissipation. The atomizing nozzle sprays the coolant in the form of water mist, which, in conjunction with the filter, extends the heat dissipation time, significantly improving the heat dissipation efficiency, thereby accelerating the cooling speed, shortening the injection molding cycle, and improving production efficiency. At the same time, it ensures that the temperature of the injection molded product is uniform, reduces deformation, and improves the quality of the injection molded product.

[0017] (2) The present invention uses a heat dissipation assembly consisting of a heat conducting rod, a first fan, and a heat sink to quickly transfer the high-temperature heat absorbed by the copper blades to the heat sink. The heat is then blown into a waste heat recovery tank via the first fan, effectively recovering the initial heat. The recovered heat can be used for workshop heating or preheating raw materials, significantly reducing energy waste, improving the energy efficiency of the device, and being more environmentally friendly. At the same time, the coolant is kept at a low temperature, ensuring the strength and toughness of the injection molded product.

[0018] (3) The present invention utilizes a transmission mechanism consisting of a rotating shaft, a driving wheel, a transmission belt, and a driven wheel. The kinetic energy generated by the flow of coolant on the copper blades and the rotating drum drives the second fan to rotate, promoting air circulation within the heat dissipation box. This, combined with the guide groove and the second exhaust pipe, achieves efficient heat dissipation without the need for an external power source. This structure significantly reduces the operating energy consumption of the device and lowers costs. Furthermore, the coordinated operation of the power component and the heat dissipation component further enhances heat dissipation efficiency, ensures stable coolant temperature, and improves the production efficiency and quality of injection molded products. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them: Figure 1It is a schematic diagram of the three-dimensional structure of the overall structure of the present invention; Figure 2 Schematic diagram of the three-dimensional structure of the cooling mechanism of the present invention; Figure 3 Schematic diagram of the cross-sectional structure of the mold of the present invention; Figure 4 It is a structural schematic diagram of the heat dissipation box of the present invention; Figure 5 This is a schematic diagram of the structure of the connection between the drive assembly, the first heat dissipation assembly, and the drain pipe of the present invention. In the figure: 100, mold; 101, molding groove; 200, cooling mechanism; 201, return cooling groove; 202, heat dissipation box; 202a, guide groove; 203, cooling box; 204, water inlet pipe; 205, water pump; 206, water extraction pipe; 207, drain pipe; 208, horizontal pipe; 209, atomizing nozzle; 210, guide pipe; 211, power assembly; 211a, mounting frame; 211b, rotating drum; 211c, blades; 212, First exhaust pipe; 212a, air guide hole; 213, first heat dissipation component; 213a, heat conducting rod; 213b, first fan; 213c, heat sink; 213c1, through hole; 214, second heat dissipation component; 214a, rotating shaft; 214b, driving wheel; 214c, transmission belt; 214d, driven wheel; 214e, transmission shaft; 214f, second fan; 215, second exhaust pipe; 216, filter; 217, waste heat recovery box. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] Reference Figures 1 to 5 A reciprocating cooling device for an injection mold comprises a mold 100 and a cooling mechanism 200. The upper surface of the mold 100 is provided with a molding groove 101, which is used to receive molten plastic and form the desired shape of the injection molded product, ensuring that the injection molded product maintains precise geometric structure and dimensional stability during the cooling process. The mold 100 is made of high-strength metal, capable of withstanding the high temperature and high pressure injection molding environment. Internal cooling channels enable efficient heat transfer, shortening the molding cycle and improving the quality of the injection molded product.

[0023] Specifically, the cooling mechanism 200 includes a circular cooling groove 201 provided inside the mold 100 and arranged around the periphery of the molding groove 101, a heat dissipation box 202 and a cooling box 203 provided outside the mold 100, and related pipes and heat dissipation components. The circular cooling groove 201 has a circular structure and is arranged around the molding groove 101, which increases the contact area between the coolant and the mold, effectively absorbs the heat of the molten plastic in the molding groove 101, ensures that the mold temperature is evenly distributed, and reduces the deformation and thermal stress of the injection molded product caused by temperature difference. The heat dissipation box 202 is used for rapid heat dissipation of cooling return water, and its internal air circulation and water atomization design improve the heat dissipation efficiency; the cooling box 203 is used to store low-temperature coolant, providing a stable cooling source for the circular cooling groove 201, ensuring that the coolant temperature is constant, thereby improving the strength and toughness of the injection molded product.

[0024] Furthermore, the right side of the front end of the circular cooling trough 201 is connected to a water inlet pipe 204, the input end of the water inlet pipe 204 is connected to a water pump 205, the input end of the water pump 205 is connected to a water extraction pipe 206, and the input end of the water extraction pipe 206 extends into the cooling box 203. The water inlet pipe 204 is used to transport the coolant from the cooling box 203 to the circular cooling trough 201. The water pump 205 provides power to ensure that the coolant enters the mold at a stable flow rate, optimizing the cooling efficiency; the water extraction pipe 206 extracts low-temperature coolant from the cooling box 203 to ensure the continuity of the coolant circulation. The right side of the front end of the circular cooling trough 201 is also connected to a drain pipe 207. The output end of the drain pipe 207 extends to the heat dissipation box 202 and is fixedly connected to a horizontal pipe 208. The bottom end of the horizontal pipe 208 is arrayed with atomizing nozzles 209. Drain pipe 207 drains the heat-absorbing coolant from the circular cooling trough 201. Horizontal pipe 208 sprays the high-temperature coolant in the form of a mist through an array of atomizing nozzles 209, increasing the heat dissipation area and significantly improving heat dissipation efficiency by facilitating air circulation within heat dissipation box 202. A flow guide 210 connects the bottom end of heat dissipation box 202. The output end of flow guide 210 is connected to the interior of cooling box 203. This guide 210 guides the dissipated coolant back to cooling box 203, forming a closed loop that ensures a continuous supply of coolant and temperature stability.

[0025] Furthermore, a power assembly 211 is provided inside the drain pipe 207, a first exhaust pipe 212 is provided at the left end of the power assembly 211, a first heat dissipation assembly 213 is provided inside the first exhaust pipe 212, and a second heat dissipation assembly 214 is transmission-connected to the right end of the power assembly 211.

[0026] The power assembly 211 is powered by the flow of coolant to drive the heat dissipation assembly. This eliminates the need for an external power source, reduces energy consumption, and achieves efficient heat transfer and recovery. The power assembly 211 includes a mounting frame 211a fixedly mounted at the input end of the drain pipe 207. A rotating drum 211b is rotatably connected to the center of the mounting frame 211a. Multiple blades 211c are mounted in a circular array on the outer surface of the rotating drum 211b. The mounting frame 211a provides a stable mounting base for the power assembly, ensuring smooth rotation of the rotating drum 211b. The rotating drum 211b, as the core component for power transmission, rotates due to the impact of the coolant through the blades 211c, converting the kinetic energy of the fluid into mechanical energy. The blades 211c are made of copper, which has a high thermal conductivity and can quickly absorb the initial heat of the coolant. This heat is then transferred to the heat-conducting structure inside the rotating drum 211b through contact, improving the heat dissipation effect.

[0027] The first heat sink assembly 213 includes a heat conducting rod 213a fixedly mounted at the center of the rotating drum 211b. The left end of the heat conducting rod 213a extends through the mounting frame 211a and into the first exhaust duct 212, where it is fixedly connected to a first fan 213b and a heat sink 213c. The heat sink 213c is located at the exhaust port of the first fan 213b. The heat conducting rod 213a is made of a highly thermally conductive material, which quickly transfers heat absorbed by the blades 211c into the first exhaust duct 212. The first fan 213b is driven by the rotation of the heat conducting rod 213a, using airflow to blow heat away from the heat sink 213c, thereby improving heat dissipation efficiency. A plurality of heat sinks 213c are provided, distributed in a circular array on the outer surface of the left side of the heat conducting rod 213a. Each of the heat sinks 213c has a through hole 213c1 formed within it. The through hole 213c1 increases the contact area between the heat sink and the air, further improving heat dissipation efficiency. The first exhaust pipe 212 is provided with an air guide hole 212a on its outer side. The input end of the air guide hole 212a is connected to the outside world. The air guide hole 212a provides an inlet for external cold air for the first fan 213b, forming an efficient convection heat dissipation channel to ensure the rapid discharge of high-temperature heat. The initial ends of multiple blades 211c extend into the interior of the rotating drum 211b and contact the outer surface of the heat-conducting rod 213a. The blades 211c are made of copper, ensuring efficient heat absorption and heat transfer. The high thermal conductivity of copper enables the blades 211c to quickly absorb heat from the high-temperature coolant in the drain pipe 207 and transfer the heat to the first heat dissipation assembly 213 through close contact with the heat-conducting rod 213a, maximizing the utilization of the initial heat and providing a foundation for subsequent waste heat recovery.

[0028] The second heat dissipation assembly 214 includes a rotating shaft 214a fixedly connected to the right end of the rotating drum 211b. The right end of the rotating shaft 214a extends through the right side wall of the mounting frame 211a and is fixedly connected to a driving pulley 214b. The outer surface of the driving pulley 214b is meshed with a transmission belt 214c. The inner side of the bottom end of the transmission belt 214c is meshed with a driven pulley 214d. The left end of the driven pulley 214d is fixedly connected to a second fan 214f ​​via a transmission shaft 214e. The second fan 214f ​​is located within the right side wall of the heat dissipation box 202. The rotating shaft 214a transmits the rotational force of the rotating drum 211b to the driving pulley 214b. The driving pulley 214b drives the driven pulley 214d via the transmission belt 214c, thereby driving the rotation of the second fan 214f. This eliminates the need for an external power source and reduces energy consumption. The second fan 214f ​​enhances the air circulation in the heat dissipation box 202 by rotating at a high speed, promotes the heat dissipation of the water mist sprayed by the atomizing nozzle 209, and further improves the cooling efficiency of the coolant.

[0029] Furthermore, a guide slot 202a is defined on the left side of the heat sink 202. The guide slot 202a and the second fan 214f ​​are located on the same plane. The output end of the guide slot 202a is connected to a second exhaust pipe 215. The guide slot 202a guides the hot air generated by the second fan 214f ​​toward a directional exhaust, preventing heat accumulation within the heat sink 202 and improving heat dissipation efficiency. The second exhaust pipe 215 then transports the hot air to a subsequent recovery system.

[0030] Preferably, a filter 216 is provided inside the heat dissipation box 202 and below the second fan 214f ​​and the guide groove 202a. The filter 216 is used to intercept impurities in the water mist to prevent pipe blockage, while slowing down the falling speed of the water mist, prolonging the contact time with the airflow of the second fan 214f, and further improving the heat dissipation effect.

[0031] Preferably, the output end of the first exhaust pipe 212 is connected to a waste heat recovery tank 217, and the output end of the second exhaust pipe 215 is also connected to the interior of the waste heat recovery tank 217. The waste heat recovery tank 217 is used to collect the high-temperature airflow exhausted by the first heat dissipation assembly 213 and the second heat dissipation assembly 214, recovering the initial heat of the coolant, which can be used for workshop heating or raw material preheating, thereby achieving efficient energy reuse, reducing energy waste, and being more environmentally friendly.

[0032] Working principle of the present invention: The molding tank 101 within the mold 100 is used to hold molten plastic for injection molding. The cooling mechanism 200 achieves efficient cooling through the circular cooling tank 201. A water pump 205 draws low-temperature coolant from the cooling tank 203 via a pumping pipe 206 and delivers it to the circular cooling tank 201 via a water inlet pipe 204, where it absorbs heat from the plastic within the molding tank 101. The high-temperature coolant is discharged through a drain pipe 207, driving the blades 211c and the rotating drum 211b in the power assembly 211 to rotate. The blades 211c are made of copper, rapidly absorbing initial heat and transferring it to the first heat sink assembly 213 via the heat conducting rod 213a. The first fan 213b in the first heat dissipation component 213 is driven by the rotational force of the rotating drum 211b, and cold air is introduced through the air guide hole 212a to blow the heat of the heat sink 213c into the waste heat recovery box 217, which can be used for workshop heating or raw material preheating; at the same time, the rotating drum 211b drives the second fan 214f ​​in the second heat dissipation component 214 through the rotating shaft 214a, the driving wheel 214b, the transmission belt 214c and the driven wheel 214d. The second fan 214f ​​accelerates the air circulation in the heat dissipation box 202, promotes the heat dissipation of the water mist sprayed by the atomizing nozzle 209 on the cross pipe 208, and the hot air flows through the guide groove 202a and the second exhaust pipe 215 into the waste heat recovery box 217; the filter 216 is used to intercept impurities in the water mist and prolong the heat dissipation time. The coolant after heat dissipation flows back to the cooling box 203 through the guide pipe 210, forming a closed cycle. The present invention realizes secondary heat dissipation through blade heat absorption, fan heat dissipation and waste heat recovery, significantly improving cooling efficiency, recovering high-temperature heat and reducing energy consumption, ensuring temperature stability and production efficiency of injection molded products.

[0033] It is important to note that the configuration and arrangement of the present application as shown in various exemplary embodiments are illustrative only. Although only a few embodiments are described in detail in this disclosure, those reading this disclosure will readily appreciate that numerous modifications are possible (e.g., variations in the size, dimensions, structure, shape, and proportions of various components, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. For example, components shown as integrally formed may be constructed from multiple parts or components, the positions of components may be inverted or otherwise altered, and the nature, number, or position of discrete components may be modified or changed. Therefore, all such modifications are intended to be encompassed within the scope of this invention. The order or sequence of any process or method steps may be altered or resequenced according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover structures described herein that perform the stated function, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of this invention. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0034] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described (i.e., those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention).

[0035] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A cooling device for an injection mold, characterized in that: include: A mold (100), wherein the upper surface of the mold (100) is provided with a molding groove (101); A cooling mechanism (200), the cooling mechanism (200) comprising a circular cooling groove (201) provided inside the mold (100) and surrounding the periphery of the molding groove (101), and further comprising a heat dissipation box (202) and a cooling box (203) provided outside the mold (100), the front end of the circular cooling groove (201) being connected to a water inlet pipe (204) on the right side, the input end of the water inlet pipe (204) being connected to a water pump (205), the input end of the water pump (205) being connected to a water pump (206), and The input end of the water pumping pipe (206) extends into the cooling box (203), the right side of the front end of the circular cooling trough (201) is connected to a drainage pipe (207), and the output end of the drainage pipe (207) extends into the heat dissipation box (202) and is fixedly connected to a transverse pipe (208), the bottom end of the transverse pipe (208) is array-mounted with atomizing nozzles (209), the bottom end of the heat dissipation box (202) is connected to a guide pipe (210), and the output end of the guide pipe (210) is connected to the interior of the cooling box (203); A power assembly (211) is provided inside the drainage pipe (207), a first exhaust pipe (212) is provided at the left end of the power assembly (211), a first heat dissipation assembly (213) is provided inside the first exhaust pipe (212), and a second heat dissipation assembly (214) is transmission-connected to the right end of the power assembly (211).

2. The mold return cooling device for injection mold according to claim 1, characterized in that: The power assembly (211) comprises a mounting frame (211a) fixedly mounted at the input end of the drainage pipe (207); a rotating drum (211b) is rotatably connected to the center of the mounting frame (211a); and a plurality of blades (211c) are mounted in a circular array on the outer surface of the rotating drum (211b).

3. The mold return cooling device for injection mold according to claim 2, characterized in that: The first heat dissipation assembly (213) comprises a heat conducting rod (213a) fixedly mounted at the center of the rotating drum (211b); the left end of the heat conducting rod (213a) passes through the mounting frame (211a) and extends into the first exhaust pipe (212), where it is fixedly connected to a first fan (213b) and a heat sink (213c); and the heat sink (213c) is arranged at the exhaust port of the first fan (213b).

4. The mold return cooling device for injection mold according to claim 3, characterized in that: Initial ends of the plurality of blades (211c) extend to the interior of the rotating drum (211b) and contact the outer surface of the heat conducting rod (213a), and the blades (211c) are made of copper.

5. The mold return cooling device for injection mold according to claim 4, characterized in that: A plurality of heat sinks (213c) are provided, and a circumferential array of the plurality of heat sinks (213c) is respectively provided on the outer surface of the left side of the heat conducting rod (213a), and a through hole (213c1) is provided inside the plurality of heat sinks (213c).

6. The mold return cooling device for injection mold according to claim 5, characterized in that: An air guide hole (212a) is provided on the outer side of the first fan (213b), and an input end of the air guide hole (212a) is connected to the outside world.

7. The mold return cooling device for injection mold according to claim 6, characterized in that: The second heat dissipation component (214) includes a rotating shaft (214a) fixedly connected to the right end of the rotating drum (211b), the right end of the rotating shaft (214a) passes through the right side wall of the installation frame (211a) and extends to the outside thereof and is fixedly connected to a driving wheel (214b), the outer surface of the driving wheel (214b) is meshedly connected to a transmission belt (214c), the inner side of the bottom end of the transmission belt (214c) is meshedly connected to a driven wheel (214d), the left end of the driven wheel (214d) is fixedly connected to a second fan (214f) via a transmission shaft (214e), and the second fan (214f) is arranged in the right side wall of the heat dissipation box (202).

8. The mold return cooling device for injection mold according to claim 7, characterized in that: A guide groove (202a) is provided on the left side inside the heat dissipation box (202), and the guide groove (202a) and the second fan (214f) are located on the same plane, and the output end of the guide groove (202a) is connected to the second exhaust pipe (215).

9. The mold return cooling device for injection mold according to claim 8, characterized in that: A filter screen (216) is provided inside the heat dissipation box (202) and below the second fan (214f) and the guide groove (202a).

10. The mold return cooling device for injection mold according to claim 9, characterized in that: The output end of the first exhaust pipe (212) is connected to a waste heat recovery box (217), and the output end of the second exhaust pipe (215) is also connected to the interior of the waste heat recovery box (217).

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