Cooling device for injection moulds

Abstract

This invention discloses a cooling device for injection molds, relating to the field of injection mold technology. It includes a base plate, a fixed frame and a lower mold fixedly connected to the upper side of the base plate, an upper mold on the upper side of the lower mold, cooling water channels on the inner sides of the lower and upper molds, two inlet pipes and two outlet pipes fixedly connected to the left side of the lower mold, and one inlet pipe and one outlet pipe fixedly connected to the left side of the upper mold. A circulation unit is located on the left side of the fixed frame, and a drying unit is located on the inner side of the fixed frame. This cooling device for injection molds, by incorporating an upper mold, a lower mold, cooling water channels, a liquid tank, and a water pump, facilitates the introduction of coolant into the cooling water channels of the upper and lower molds, thus cooling the mold and product. The coolant is also introduced into the liquid tank. Multiple mounting pipes and heat exchange pipes on the rotating pipe are controlled to rotate, introducing cold water into the mounting pipes and heat exchange pipes to increase the cooling effect of the coolant and facilitate its circulation.

Description

Technical Field

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

[0002] Injection molds are specialized tools used for plastic injection molding. Their core function is to inject molten plastic raw materials into their internal cavity under high pressure, and after cooling and solidification, ultimately obtain the desired plastic product.

[0003] A search revealed Chinese patent application number "CN202520655417.5," which specifically describes a cooling mechanism for injection molds. The mechanism includes a mold body, a housing on one side of the mold body, and a water pump fixedly mounted on one side of the housing. The outlet of the water pump is fixedly connected to a transmission pipe, one end of which is fixedly connected to one side of the mold body. This invention relates to the technical field of injection molds. By incorporating a transmission mechanism, this invention allows the water pump to draw coolant from the housing, which then flows through the transmission pipe into the mold body for cooling. The coolant then returns to the housing via a return pipe.

[0004] The commonly used cooling method in current technology involves circulating coolant through the mold's water channels to absorb heat, then draining it into a collection tank. External airflow then cools the coolant for reuse. However, this air-cooling method has significant limitations: the coolant's heat must first be transferred to the tank surface before being carried away by the air, resulting in low heat dissipation efficiency. Especially when the ambient temperature is high or the mold is operating under continuous high load, it is difficult to lower the coolant to the ideal temperature. Sustained high coolant temperature not only weakens subsequent cooling capacity but can also lead to uneven cooling, causing quality problems such as product warping and gloss differences, thus affecting production efficiency.

[0005] Therefore, the present invention proposes a cooling device for injection molds to solve the aforementioned problems. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a cooling device for injection molds, which solves the problem of poor cooling effect when using coolant to cool molded products and the cooling effect of coolant circulation.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A cooling device for injection molds includes a base plate. A fixed frame and a lower mold are fixedly connected to the upper side of the base plate. An upper mold is provided on the upper side of the lower mold. Cooling water channels are provided on the inner sides of the lower mold and the upper mold. A second water inlet pipe and a second water outlet pipe are fixedly connected to the left side of the lower mold. A first water inlet pipe and a first water outlet pipe are fixedly connected to the left side of the upper mold. A circulation unit is provided on the left side of the fixed frame. A drying unit is provided on the inner side of the fixed frame. The circulation unit includes a liquid tank, which is fixedly connected to the left side of the fixed frame. Rotary pipes are rotatably connected to the front and rear inner walls of the liquid tank. A connecting roller is fixedly connected between two of the rotating pipes. A heat exchange component is provided on the outer side of the connecting roller. The heat exchange component is used for uniform cooling of the coolant.

[0008] Preferably, each of the first drain pipe and the second drain pipe is fixedly connected to the liquid tank, and two water pumps are fixedly connected to the inner side of the fixed frame. Each water pump is connected to the first inlet pipe and the second inlet pipe. A valve 2 is provided on the outer side of each of the first drain pipe and the second drain pipe, and a valve 1 is provided on the outer side of each of the first inlet pipe and the second inlet pipe.

[0009] Preferably, a fixed cover is fixedly connected to the front side of the liquid tank, a cooler and a motor are fixedly connected to the front side of the fixed cover, a gear is fixedly connected to the outer side of the rotating tube on the front side, a rotating shaft is rotatably connected to the front side of the liquid tank, a gear is fixedly connected to the outer side of the rotating shaft and meshes with the gear, the output end of the motor is fixedly connected to the outer end of the rotating shaft, and the output end of the cooler is located inside the rotating tube.

[0010] Preferably, a gas storage tank is fixedly connected to the rear side of the liquid tank, a conveying pipe is fixedly connected to the inner side of the gas storage tank, a one-way valve is provided on the outer side of the conveying pipe, a pressure relief valve is provided on the upper side of the gas storage tank, a reciprocating component and a swing component are provided on the heat exchange assembly, and the conveying pipe is connected to the rotating pipe.

[0011] Preferably, the heat exchange assembly is provided in multiple sets, and the heat exchange assembly includes two branch plates. Both branch plates are fixedly connected to the outside of the connecting roller. A sliding groove is opened on the outside of the branch plate. A slider is slidably connected to the inside of the sliding groove. A control tube is rotatably connected to the outside of the slider. A fixed plate is fixedly connected to the outer end of the control tube. An installation tube is fixedly connected between the two fixed plates. Multiple heat exchange tubes are fixedly connected to the outside of the installation tube. A branch tube is fixedly connected between the slider and the rotating tube. The branch tube communicates with the control tube.

[0012] Preferably, the swing assembly includes a rotating plate, which is fixedly connected to the outside of the control tube. A linkage plate is rotatably connected to the outside of the rotating plate, and a connecting rod is rotatably connected to the outside of the branch plate. The connecting rod is fixedly connected to the linkage plate.

[0013] Preferably, an L-shaped block is fixedly connected to the front side of each of the plurality of sliders, and a rotating block one is fixedly connected to the front side of each of the plurality of L-shaped blocks. An inclined plate is rotatably connected to the outer side of the rotating block one, and a rotating block two is rotatably connected to the outer side of the inclined plate. A reciprocating ring is fixedly connected to the outer side of the rotating block two, and a stop rod is fixedly connected to the outer side of the reciprocating ring. A plurality of protrusions are fixedly connected to the inner side of the liquid tank, and the stop rod abuts against the protrusions. A spring is fixedly connected between the outer side of the slider and the inner wall of the slide groove, and the reciprocating ring is slidably connected to the rotating tube.

[0014] Preferably, the drying unit includes a central pipe, which is fixedly connected to the right side of the liquid tank. A valve three is provided on the outer side of the central pipe. A telescopic pipe is fixedly connected to the upper side of the central pipe. A U-shaped pipe one is fixedly connected between the water inlet pipe one and the telescopic pipe. A U-shaped pipe two is fixedly connected between the central pipe and the water inlet pipe two. A valve four is provided on the outer side of both the U-shaped pipe one and the U-shaped pipe two. An exhaust pipe is fixedly connected to the outer side of both the drain pipe two and the drain pipe one. A valve five is provided on the outer side of the exhaust pipe. A mounting block is fixedly connected to the inner side of the fixing frame. A surrounding pipe is fixedly connected to the outer side of the mounting block. Multiple nozzles are fixedly connected to the outer side of the surrounding pipe. The surrounding pipe is fixedly connected to the exhaust pipe.

[0015] This invention provides a cooling device for injection molds. Compared with the prior art, it has the following advantages: (1) The cooling device for the injection mold is equipped with an upper mold, a lower mold, a cooling water channel, a liquid tank, and a water pump. It facilitates the flow of coolant into the cooling water channel in the upper and lower molds to cool the mold and the product. It also controls the rotation of multiple mounting pipes and heat exchange pipes on the rotating pipe to flow cold water into the mounting pipes and heat exchange pipes, thereby increasing the cooling effect of the coolant and facilitating the circulation of the coolant.

[0016] (2) The cooling device for the injection mold is equipped with an installation tube, a heat exchange tube, a rotating plate, an inclined plate, a reciprocating ring, a stop rod and a protrusion, which facilitates the control of the rotation of the installation tube, the control of the reciprocating movement of multiple installation tubes, and the control of the repeated swinging of the heat exchange tube on the installation tube, thereby further improving the heat exchange effect.

[0017] (3) The cooling device for the injection mold is equipped with a surrounding pipe, a nozzle, two drain pipes, one U-shaped pipe, and two U-shaped pipes. When the airflow cools the coolant, the airflow is heated and stored in the air storage box. After demolding, the hot airflow is introduced into the cooling air path to facilitate the drying of the water path. At the same time, multiple nozzles spray hot air onto the mold surface to preheat the mold and facilitate the next plastic molding. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional perspective view of the lower mold in this invention; Figure 3 This is a three-dimensional structural diagram of the loop unit in this invention; Figure 4 This is a cross-sectional perspective view of the cyclic unit in this invention; Figure 5 This is a partial three-dimensional result diagram of the cyclic unit in this invention; Figure 6 for Figure 5 Enlarged view of point A in the middle; Figure 7 for Figure 5 Enlarged view of point B in the middle; Figure 8 This is a cross-sectional perspective view of the branch plate in this invention; Figure 9 This is a three-dimensional structural diagram of the drying unit in this invention; Figure 10 for Figure 9 A magnified view of point C in the middle.

[0019] In the diagram: 1. Base plate; 2. Fixing frame; 3. Lower mold; 4. Upper mold; 5. Drying unit; 6. Circulation unit; 7. Drain pipe 1; 8. Drain pipe 2; 9. Connecting pipe; 10. Inlet pipe 1; 11. Inlet pipe 2; 12. Cooling water circuit; 13. Water pump; 14. Valve 1; 15. Valve 2; 51. Centralized pipe; 52. Valve 3; 53. Telescopic pipe; 54. U-shaped pipe 1; 55. U-shaped pipe 2; 56. Valve 4; 57. Exhaust pipe; 58. Valve 5; 59. Mounting block; 510. Circulating pipe; 511. Nozzle; 61. Liquid tank; 62. Rotary pipe; 63. Connecting roller; 64. Heat exchange assembly; 65. Reciprocating assembly; 6 6. Swing assembly; 67. Fixed cover; 68. Air cooler; 69. Motor; 610. Air tank; 611. Pressure relief valve; 612. Conveying pipe; 613. Gear 1; 614. Rotating shaft; 615. Gear 2; 641. Branch plate; 642. Slide groove; 643. Sliding block; 644. Control pipe; 645. Fixed plate; 646. Mounting pipe; 647. Heat exchanger tube; 648. Branch pipe; 649. Spring; 651. L-shaped block; 652. Rotating block 1; 653. Inclined plate; 654. Rotating block 2; 655. Reciprocating ring; 656. Support rod; 657. Protrusion; 661. Rotating plate; 662. Linkage plate; 663. Connecting rod. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] This invention provides the following technical solutions: Please see Figure 1 - Figure 10 A cooling device for injection molds includes a base plate 1. A fixed frame 2 and a lower mold 3 are fixedly connected to the upper side of the base plate 1. An upper mold 4 is arranged on the upper side of the lower mold 3. Cooling water channels 12 are arranged inside the lower mold 3 and the upper mold 4. A second water inlet pipe 11 and a second drain pipe 8 are fixedly connected to the left side of the lower mold 3. A first water inlet pipe 10 and a first drain pipe 7 are fixedly connected to the left side of the upper mold 4. A circulation unit 6 is arranged on the left side of the fixed frame 2. A drying unit 5 is arranged inside the fixed frame 2. The circulation unit 6 includes a liquid tank 61, which is fixedly connected to the left side of the fixed frame 2. Rotary pipes 62 are rotatably connected to the front and rear inner walls of the liquid tank 61. A connecting roller 63 is fixedly connected between the two rotating pipes 62. A heat exchange component 64 is arranged on the outer side of the connecting roller 63. The heat exchange component 64 is used for uniform cooling of the coolant. The first drain pipe 7, the first water inlet pipe 10, and the connecting pipe 9 are all made of flexible hose material. The cooling water channels 12 adopt diffusion welding technology and are pre-welded. Two metal plates are processed with 3D or contoured water channels, and then the two plates are welded together by diffusion welding, making it possible to form a closed channel for the 3D cooling water channel 12. Based on the ability to achieve large-area close contact between the two metal plates by heating and pressurizing, and then through the interdiffusion and interface migration of atoms between the contact surfaces, the gaps between the original interfaces are eliminated, and the metal plates are seamlessly connected into a whole. This technology facilitates the processing of the required shape of the cooling water channel 12. During injection molding, the output end of the water pump 13 is connected to the liquid tank 61. The two water pumps 13 are started to draw out the coolant in the liquid tank 61 and pass it through the inlet pipe 10 and the inlet pipe 21 to the cooling water channels 12 on the upper and lower sides, so that the coolant cools the upper and lower sides of the product at the same time. Then, through the drain pipe 1 7, the drain pipe 2 8 and the connecting pipe 9, the coolant is easily circulated back into the liquid tank 61.

[0022] A connecting pipe 9 is fixedly connected between drain pipe 7 and drain pipe 8 and liquid tank 61. Two water pumps 13 are fixedly connected to the inside of the fixed frame 2. The water pumps 13 are connected to inlet pipe 10 and inlet pipe 21. A valve 2 15 is installed on the outside of drain pipe 7 and drain pipe 28. A valve 14 is installed on the outside of inlet pipe 10 and inlet pipe 21.

[0023] A fixed cover 67 is fixedly connected to the front of the liquid tank 61. A cooler 68 and a motor 69 are fixedly connected to the front of the fixed cover 67. Gears 613 are fixedly connected to the outer side of the front rotating pipe 62. A rotating shaft 614 is rotatably connected to the front of the liquid tank 61. A gear 615 that meshes with gear 613 is fixedly connected to the outer side of the rotating shaft 614. The output end of the motor 69 is fixedly connected to the outer end of the rotating shaft 614. The output end of the cooler 68 is located inside the rotating pipe 62. A gas storage tank 610 is fixedly connected to the rear of the liquid tank 61. A conveyor belt is fixedly connected to the inner side of the gas storage tank 610. Pipe 612, a one-way valve is provided on the outside of the conveying pipe 612, a pressure relief valve 611 is provided on the upper side of the air storage tank 610, a reciprocating assembly 65 and a swing assembly 66 are provided on the heat exchange assembly 64, the conveying pipe 612 is connected to the rotating pipe 62, multiple sets of heat exchange assemblies 64 are provided, the heat exchange assembly 64 includes two branch plates 641, both branch plates 641 are fixedly connected to the outside of the connecting roller 63, a sliding groove 642 is opened on the outside of the branch plate 641, a slider 643 is slidably connected to the inside of the sliding groove 642, a control pipe 644 is rotatably connected to the outside of the slider 643, the control pipe 644... A fixed plate 645 is fixedly connected to the outer end, and an installation pipe 646 is fixedly connected between the two fixed plates 645. Multiple heat exchange pipes 647 are fixedly connected to the outer side of the installation pipe 646. A branch pipe 648 is fixedly connected between the slider 643 and the rotating pipe 62. The branch pipe 648 is connected to the control pipe 644. When cooling the coolant, the motor 69 and the air cooler 68 are started. First, the motor 69 drives the rotating shaft 614 to rotate, the rotating shaft 614 drives the gear two 615 to rotate, the gear two 615 drives the gear one 613 to rotate, the gear one 613 drives the rotating pipe 62 to rotate, and the rotating pipe 62 drives the connecting... The connecting roller 63 rotates, which drives the mounting pipe 646 to rotate. The mounting pipe 646 drives the heat exchange pipe 647 to rotate, which facilitates the stirring of the coolant inside the liquid tank 61. At the same time, the cold air blown by the cold air blower 68 enters the rotating pipe 62 and passes through the branch pipe 648 to enter the control pipe 644. The cold air flows into the heat exchange pipe 647 on the mounting pipe 646, so that the coolant is cooled evenly by the cold air. Then, through the conveying pipe 612, the heated airflow enters the gas storage tank 610 for storage. When the pressure inside the tank is too high, part of the airflow is discharged through the pressure relief valve 611.

[0024] The swing assembly 66 includes a rotating plate 661, which is fixedly connected to the outside of the control tube 644. A linkage plate 662 is rotatably connected to the outside of the rotating plate 661. A connecting rod 663 is rotatably connected to the outside of the branch plate 641. The connecting rod 663 is fixedly connected to the linkage plate 662. An L-shaped block 651 is fixedly connected to the front of each of the multiple sliders 643. A first rotating block 652 is fixedly connected to the front of each of the multiple L-shaped blocks 651. An inclined plate 653 is rotatably connected to the outside of the first rotating block 652. A second rotating block 654 is rotatably connected to the outside of the inclined plate 653. A reciprocating ring 655 is fixedly connected to the outside of the second rotating block 654. A stop rod 656 is fixedly connected to the outside of the reciprocating ring 655. Multiple protrusions 657 are fixedly connected to the inside of the liquid tank 61. The stop rod 656 abuts against the protrusions 657. A spring 64 is fixedly connected between the outside of the slider 643 and the inner wall of the slide groove 642. 9. The reciprocating ring 655 is slidably connected to the rotating tube 62. When the connecting roller 63 rotates, the rotating tube 62 drives the abutment rod 656 on the reciprocating ring 655 to rotate. Under the action of multiple protrusions 657, the abutment rod 656 moves back and forth. The abutment rod 656 drives the reciprocating ring 655 to move back and forth. The reciprocating ring 655 drives the inclined plate 653 to rotate. The inclined plate 653 drives the L-shaped block 651 to move up and down. The L-shaped block 651 drives the slider 643 to move. The slider 643 drives the control tube 644 to move. The control tube 644 drives the heat exchange tube 647 on the mounting tube 646 to move up and down reciprocally, further improving the heat exchange effect. At the same time, under the action of the connecting rod 663 and the linkage plate 662, the rotating plate 661 is controlled to swing. The rotating plate 661 drives the control tube 644 to rotate repeatedly in the forward and reverse directions. The control tube 644 drives the heat exchange tube 647 on the mounting tube 646 to swing, further improving the stirring effect.

[0025] The drying unit 5 includes a central pipe 51, which is fixedly connected to the right side of the liquid tank 61. A valve 52 is installed on the outer side of the central pipe 51. A telescopic pipe 53 is fixedly connected to the upper side of the central pipe 51. A U-shaped pipe 54 is fixedly connected between the inlet pipe 10 and the telescopic pipe 53. A U-shaped pipe 55 is fixedly connected between the central pipe 51 and the inlet pipe 11. Valves 56 are installed on the outer sides of both the U-shaped pipe 54 and the U-shaped pipe 55. An exhaust pipe 57 is fixedly connected to the outer sides of the drain pipe 8 and the drain pipe 7. A valve 58 is installed on the outer side of the exhaust pipe 57. A mounting block 59 is fixedly connected to the inner side of the fixing frame 2. A surrounding pipe 510 is fixedly connected to the outer side of the mounting block 59. Multiple nozzles 511 are fixedly connected to the outer side of the surrounding pipe 510. The surrounding pipe 510 is fixedly connected to the exhaust pipe 57. When cooling the coolant, the airflow is heated. The air storage tank 610 stores the airflow. Valve 3 52 is opened, two valves 4 56 are opened, and valves 1 14 and 2 15 are closed. The hot airflow passes through the central pipe 51 and is distributed to the U-shaped pipe 2 55 and the telescopic pipe 53. Through the U-shaped pipe 1 54, the hot airflow is introduced into the water inlet pipe 1 10 and the water inlet pipe 2 11, allowing the hot airflow to flow into the cooling water passages 12 on both sides. This facilitates the hot airflow to dry the coolant remaining in the cooling water passages 12. Valve 5 58 is opened, allowing the airflow to pass through the exhaust pipe 57 and be introduced into the surrounding pipe 510. Multiple nozzles 511 spray airflow onto the mold surface, facilitating the preheating of the mold surface and making it easier for the next injection molding.

[0026] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0027] Working principle: During injection molding, the output end of water pump 13 is connected to liquid tank 61. Two water pumps 13 are started to draw out the coolant in liquid tank 61 and pass it through inlet pipe 10 and inlet pipe 21 to the cooling water circuits 12 on the upper and lower sides, so that the coolant cools the upper and lower sides of the product at the same time. Then, through drain pipe 1, drain pipe 2, and connecting pipe 9, the coolant is easily circulated back into liquid tank 61.

[0028] When cooling the coolant, motor 69 and air cooler 68 are started. First, motor 69 drives shaft 614 to rotate, shaft 614 drives gear 2 615 to rotate, gear 2 615 drives gear 1 613 to rotate, gear 1 613 drives rotating tube 62 to rotate, rotating tube 62 drives connecting roller 63 to rotate, connecting roller 63 drives mounting tube 646 to rotate, and mounting tube 646 drives heat exchange tube 647 to rotate, facilitating the stirring of the coolant inside the liquid tank 61. At the same time, cold air blown by air cooler 68 enters rotating tube 62 and, through branch pipe 648, enters control pipe 644. The cold air flows into heat exchange tube 647 on mounting tube 646, allowing the coolant to be cooled evenly by the cold air. Then, through delivery pipe 612, the heated airflow enters storage tank 610 for storage. When the pressure inside the tank is too high, it is released through a venting system. The pressure valve 611 discharges part of the airflow. When the connecting roller 63 rotates, the rotating tube 62 drives the abutment rod 656 on the reciprocating ring 655 to rotate. Under the action of multiple protrusions 657, the abutment rod 656 moves back and forth. The abutment rod 656 drives the reciprocating ring 655 to move back and forth. The reciprocating ring 655 drives the inclined plate 653 to rotate. The inclined plate 653 drives the L-shaped block 651 to move up and down. The L-shaped block 651 drives the slider 643 to move. The slider 643 drives the control tube 644 to move. The control tube 644 drives the heat exchange tube 647 on the mounting tube 646 to move up and down reciprocally, further improving the heat exchange effect. At the same time, under the action of the connecting rod 663 and the linkage plate 662, the rotating plate 661 is controlled to swing. The rotating plate 661 drives the control tube 644 to rotate repeatedly in the forward and reverse directions. The control tube 644 drives the heat exchange tube 647 on the mounting tube 646 to swing, further improving the stirring effect.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cooling device for injection molds, comprising a base plate (1), characterized in that: The upper side of the base plate (1) is fixedly connected to a fixed frame (2) and a lower mold (3). An upper mold (4) is provided on the upper side of the lower mold (3). Cooling water channels (12) are provided on the inner sides of the lower mold (3) and the upper mold (4). A second water inlet pipe (11) and a second drain pipe (8) are fixedly connected on the left side of the lower mold (3). A first water inlet pipe (10) and a first drain pipe (7) are fixedly connected on the left side of the upper mold (4). A circulation unit (6) is provided on the left side of the fixed frame (2). A drying unit (5) is provided on the inner side of the fixed frame (2). The circulation unit (6) includes a liquid tank (61). The liquid tank (61) is fixedly connected to the left side of the fixed frame (2). Rotary tubes (62) are rotatably connected to the front and rear inner walls of the liquid tank (61). A connecting roller (63) is fixedly connected between the two rotating tubes (62). A heat exchange component (64) is provided on the outer side of the connecting roller (63). The heat exchange component (64) is used for uniform cooling of the coolant.

2. The cooling device for injection molds according to claim 1, characterized in that: The drain pipe 1 (7) and drain pipe 2 (8) are fixedly connected to the liquid tank (61) by a connecting pipe (9). The inner side of the fixed frame (2) is fixedly connected to two water pumps (13). The water pumps (13) are connected to the inlet pipe 1 (10) and inlet pipe 2 (11). The outer side of the drain pipe 1 (7) and drain pipe 2 (8) is provided with valve 2 (15). The outer side of the inlet pipe 1 (10) and inlet pipe 2 (11) is provided with valve 1 (14).

3. A cooling device for injection molds according to claim 2, characterized in that: A fixed cover (67) is fixedly connected to the front side of the liquid tank (61). A cooler (68) and a motor (69) are fixedly connected to the front side of the fixed cover (67). Gear 1 (613) is fixedly connected to the outer side of the rotating tube (62) on the front side. A rotating shaft (614) is rotatably connected to the front side of the liquid tank (61). Gear 2 (615) that meshes with gear 1 (613) is fixedly connected to the outer side of the rotating shaft (614). The output end of the motor (69) is fixedly connected to the outer end of the rotating shaft (614). The output end of the cooler (68) is located inside the rotating tube (62).

4. A cooling device for injection molds according to claim 3, characterized in that: A gas storage tank (610) is fixedly connected to the rear side of the liquid tank (61). A delivery pipe (612) is fixedly connected to the inner side of the gas storage tank (610). A one-way valve is provided on the outer side of the delivery pipe (612). A pressure relief valve (611) is provided on the upper side of the gas storage tank (610). A reciprocating assembly (65) and a swing assembly (66) are provided on the heat exchange assembly (64). The delivery pipe (612) is connected to the rotating pipe (62).

5. A cooling device for injection molds according to claim 4, characterized in that: The heat exchange assembly (64) is provided in multiple sets. The heat exchange assembly (64) includes two branch plates (641). Both branch plates (641) are fixedly connected to the outside of the connecting roller (63). A sliding groove (642) is opened on the outside of the branch plate (641). A slider (643) is slidably connected to the inside of the sliding groove (642). A control tube (644) is rotatably connected to the outside of the slider (643). A fixed plate (645) is fixedly connected to the outer end of the control tube (644). An installation tube (646) is fixedly connected between the two fixed plates (645). Multiple heat exchange tubes (647) are fixedly connected to the outside of the installation tube (646). A branch tube (648) is fixedly connected between the slider (643) and the rotating tube (62). The branch tube (648) is connected to the control tube (644).

6. A cooling device for injection molds according to claim 5, characterized in that: The swing assembly (66) includes a rotating plate (661), which is fixedly connected to the outside of the control tube (644). A linkage plate (662) is rotatably connected to the outside of the rotating plate (661), and a connecting rod (663) is rotatably connected to the outside of the branch plate (641). The connecting rod (663) is fixedly connected to the linkage plate (662).

7. A cooling device for injection molds according to claim 6, characterized in that: Each of the multiple sliders (643) is fixedly connected to an L-shaped block (651) on its front side. Each of the multiple L-shaped blocks (651) is fixedly connected to a rotating block one (652) on its front side. An inclined plate (653) is rotatably connected to the outer side of the rotating block one (652). A rotating block two (654) is rotatably connected to the outer side of the inclined plate (653). A reciprocating ring (655) is fixedly connected to the outer side of the rotating block two (654). A stop rod (656) is fixedly connected to the outer side of the reciprocating ring (655). Multiple protrusions (657) are fixedly connected to the inner side of the liquid tank (61). The stop rod (656) abuts against the protrusions (657). A spring (649) is fixedly connected between the outer side of the slider (643) and the inner wall of the slide groove (642). The reciprocating ring (655) is slidably connected to the rotating tube (62).

8. A cooling device for injection molds according to claim 7, characterized in that: The drying unit (5) includes a central pipe (51), which is fixedly connected to the right side of the liquid tank (61). A valve three (52) is provided on the outside of the central pipe (51). A telescopic pipe (53) is fixedly connected to the upper side of the central pipe (51). A U-shaped pipe one (54) is fixedly connected between the water inlet pipe one (10) and the telescopic pipe (53). A U-shaped pipe two (55) is fixedly connected between the central pipe (51) and the water inlet pipe two (11). The U-shaped pipe one (54) and the U-shaped pipe two (55) are fixedly connected. Valves four (56) are provided on the outside of each of the drain pipes (8) and drain pipe one (7). Exhaust pipes (57) are fixedly connected to the outside of each of the drain pipes (8) and drain pipe one (7). Valves five (58) are provided on the outside of each of the exhaust pipes (57). Mounting blocks (59) are fixedly connected to the inside of the fixed frame (2). A surrounding pipe (510) is fixedly connected to the outside of the mounting block (59). Multiple nozzles (511) are fixedly connected to the outside of the surrounding pipe (510). The surrounding pipe (510) is fixedly connected to the exhaust pipe (57).

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