Injection mold with water cooling channel

Abstract

The invention discloses an injection mold provided with a water cooling channel, and belongs to the technical field of plastic waste recovery processing, the injection mold comprises an upper mold, the top of the upper mold is provided with an injection molding hole, and a lower mold is installed below the upper mold; the bottom plate is fixed to the lower end face of the lower mold, a first heat dissipation mechanism is arranged in the bottom plate, the first heat dissipation mechanism cools the lower mold in a liquid cooling mode, and the first heat dissipation mechanism communicates with cooling liquid in the liquid storage tank; and the second heat dissipation mechanism is arranged on the inner side of the supporting plate, and the second heat dissipation mechanism cools the lower mold in an air cooling mode. According to the injection mold provided with the water cooling channel, the mold is cooled in a liquid and air cooling combined mode, and then product forming is accelerated, so that the cooling efficiency can be improved, the consumed time is shortened, meanwhile, the liquid absorbing heat can be cooled in time, and the high temperature does not exist when the liquid is recycled.

Description

Technical Field

[0001] This invention relates to the field of plastic waste recycling and processing technology, specifically to an injection mold equipped with a water-cooling channel. Background Technology

[0002] Plastic waste, after recycling, can be reprocessed into other products, thus requiring the use of injection molds. During the injection molding process, cooling is necessary, typically using water as the primary heat transfer medium. Efficient molding of plastic materials is achieved through precise control of water flow, temperature, and pressure parameters. As a significant innovation in modern injection molding technology, water's high specific heat capacity and excellent thermal conductivity significantly improve the cooling efficiency and production quality of traditional injection molding processes. For example, an injection mold with a water-cooled structure (publication number CN220429182U) belongs to the field of injection mold technology. Its key technical features include: a water-cooling unit installed on the injection mold body; a heat-conducting unit slidably connected within the water-cooling unit and connected to the injection mold body; and an adjustment unit installed on the heat-conducting unit. After injection molding, when cooling the injection mold body, the water-cooling unit is activated, allowing the injection mold body to cool down. Heat from the surface of the injection mold body can be transferred to the cooling water through the heat-conducting unit. By adjusting the adjustment unit, the contact range between the heat conduction unit and the injection mold body and cooling water can be adjusted, thereby regulating the heat conduction and cooling effect of the injection mold body. Therefore, this increases the method for adjusting the cooling efficiency of the injection mold body, facilitating effective regulation of its cooling efficiency. For example, a water-cooling mechanism for injection molds, with announcement number CN218803826U, has the following key technical points: it includes an upper injection mold, a lower injection mold is provided on the bottom surface of the upper injection mold, a cooling port is provided on one side of the lower injection mold, a first fixing plate is provided inside the cooling port, and a second fixing plate is provided on the top surface of the first fixing plate; a cooling assembly is provided on one side of the first fixing plate for cooling the upper and lower injection molds. The cooling assembly includes: two connecting slots, and through the cooperation of a water inlet pipe, upper injection mold, lower injection mold, connecting pipe, PLC controller, hydraulic pump, water-cooling pipe, first threaded rod, first threaded hole, and second fixing plate and first fixing plate, the water-cooling pipe can be replaced, preventing the need to replace the entire upper and lower injection molds when the water-cooling pipe is damaged, thus avoiding waste. However, the above-mentioned injection mold still has the following disadvantages in actual use: Traditional injection molds mostly use a single heat dissipation structure to cool the mold during processing, which has low cooling efficiency and takes a lot of time. There is a lack of ways to combine multiple heat dissipation structures for cooling. In addition, the coolant is recycled after absorbing heat and its temperature is still high, so the heat dissipation is not very good. The cooling treatment of the coolant after heat absorption is not perfect. To address the above problems, there is an urgent need to innovate the design based on the existing injection molds. Summary of the Invention

[0003] The purpose of this invention is to provide an injection mold with a water-cooling channel to solve the problems mentioned in the background art. Traditional injection molds mostly use a single heat dissipation structure to cool the mold during processing, which has low cooling efficiency, takes a lot of time, lacks a way to combine multiple heat dissipation structures for cooling, and the coolant is recycled after absorbing heat, so the temperature is still high and thus does not achieve good heat dissipation. The cooling treatment of the coolant after heat absorption is not perfect.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an injection mold with a water cooling channel, comprising an upper mold, an injection hole at the top of the upper mold, a lower mold installed below the upper mold, and a molding cavity between the lower mold and the upper mold; It also includes: a base plate, fixed to the lower end face of the lower mold, the base plate having a first heat dissipation mechanism inside, the first heat dissipation mechanism cooling the lower mold by liquid cooling, the first heat dissipation mechanism being in communication with the coolant inside the liquid storage tank, the liquid storage tank being located below the base plate, and the base plate and the liquid storage tank being fixedly connected by a support plate; and a second heat dissipation mechanism, located inside the support plate, the second heat dissipation mechanism cooling the lower mold by air cooling.

[0005] Preferably, the first heat dissipation mechanism includes heat dissipation channels formed in the base plate, and the heat dissipation channels are distributed at equal angles with the central axis of the base plate as the center, and the heat dissipation channels are curved. At the same time, a connecting channel is provided at the ends of the heat dissipation channels that are far apart from each other, and the connecting channel is a circular structure.

[0006] Preferably, the center of the base plate is connected to the inner bottom surface of the storage tank via an infusion tube, and the end of the infusion tube away from the base plate is connected to the infusion pump, and the infusion tube is fixed between the storage tank and the base plate.

[0007] Preferably, the liquid storage tank has a partition plate fixed inside, and coolant is stored above and below the partition plate. The upper surface of the liquid storage tank has evenly reserved fixing holes, and return water pipes are fixed at equal intervals on the side of the liquid storage tank. The spaces above and below the partition plate are connected to each other through the return water pipes.

[0008] Preferably, the first heat dissipation mechanism further includes a servo motor mounted on the end of the support plate, and the output shaft of the servo motor is connected to a reciprocating lead screw, and the two reciprocating lead screws are connected to each other through a pulley mechanism. At the same time, the ends of the reciprocating lead screw and the movable plate are threadedly connected, and the movable plate slides against the side of the support plate.

[0009] Preferably, the upper surface of the movable plate has liquid outlet holes at equal intervals, and the movable plates are symmetrically distributed about the base plate. The side of the movable plate is fixedly connected to one end of the hose, while the other end of the hose is fixed to the base plate.

[0010] Preferably, one end of the hose is connected to the other end of the fixed channel and the connecting channel, and the other end of the hose is connected to the movable plate, and the fixed channel is set inside the base plate.

[0011] Preferably, the second heat dissipation mechanism includes a fan blade fixedly mounted on a reciprocating lead screw, and a protective cover is fitted on the outer side of the fan blade. The protective cover is fixed to the support plate, and the protective cover is connected to the interior of the fixed cavity through a pipe. The fixed cavity is located inside the support plate.

[0012] Preferably, the fixing cavities in the two support plates are connected by a connecting pipe, and the fixing cavities are connected to the air supply channel and the air nozzles, and the air nozzles are fixed at equal intervals to the side of the support plates, and the air nozzles have a "V" shaped structure.

[0013] Compared with the prior art, the beneficial effects of the present invention are: the injection mold equipped with a water-cooling channel achieves cooling of the mold and accelerates product molding by combining liquid and air cooling, thus improving cooling efficiency and reducing consumption time. At the same time, it can cool the liquid after absorbing heat in a timely manner so that the liquid does not have a high temperature when it is recycled. The specific details are as follows: 1. When the coolant flows inside the base plate, it flows from the center to the surrounding area, which can evenly absorb the heat at the bottom of the mold. After absorbing the heat, the liquid flows to the connecting channel to collect and then is transmitted to the movable plate and discharged from the liquid outlet to spray onto the lower end face of the base plate. On the one hand, it further cools down by spraying, and on the other hand, it sprays the liquid after absorbing the heat, so that it can be dispersed and fall down to dissipate heat. 2. Through the threaded transmission between the reciprocating screw and the movable plate, the two movable plates can be driven to move back and forth, so that the liquid can be evenly sprayed on the lower end surface of the base plate, improving the heat dissipation effect. Then the liquid flows through the fixed hole to the space above the partition plate for recycling, so as to be recycled later. When the liquid above the partition plate reaches a certain amount, it can flow through the return water pipe to the bottom of the partition plate. At this time, the coolant that has absorbed heat is also sufficient to cool down. 3. The air force generated by the fan blade rotation can be transmitted to the fixed cavity, and then transmitted to the jet nozzle through the air supply channel. Part of the air is blown towards the lower end face of the base plate to improve the heat dissipation effect, and the other part of the air is blown towards the fixed hole to dissipate the coolant after absorbing heat. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the base plate of the present invention; Figure 3 This is a schematic cross-sectional view of the liquid storage tank of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a schematic diagram of the reciprocating lead screw structure of the present invention; Figure 6 This is a partial cross-sectional view of the support plate of the present invention; Figure 7 This is a schematic cross-sectional view of the movable plate structure of the present invention; Figure 8 This is a schematic diagram of the fan blade structure of the present invention.

[0015] In the diagram: 1. Upper mold; 2. Injection hole; 3. Lower mold; 4. Molding cavity; 5. Base plate; 6. Heat dissipation channel; 7. Connecting channel; 8. Infusion pipe; 9. Storage tank; 10. Support plate; 11. Fixing hole; 12. Divider plate; 13. Return water pipe; 14. Servo motor; 15. Reciprocating screw; 16. Movable plate; 17. Liquid outlet; 18. Hose; 19. Fixing channel; 20. Fan blade; 21. Protective cover; 22. Fixing cavity; 23. Connecting pipe; 24. Air supply channel; 25. Air nozzle. Detailed Implementation

[0016] 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.

[0017] Please see Figures 1-8 The present invention provides the following technical solution: Example 1: To address the problems existing in the prior art, this example provides the following technical solution: an injection mold with a water-cooling channel, comprising an upper mold 1, an injection hole 2 at the top of the upper mold 1, and a lower mold 3 installed below the upper mold 1, with a molding cavity 4 between the lower mold 3 and the upper mold 1; further comprising: a base plate 5, fixed to the lower end face of the lower mold 3, the base plate 5 having a first heat dissipation mechanism inside, the first heat dissipation mechanism cooling the lower mold 3 by liquid cooling, the first heat dissipation mechanism being interconnected with the coolant inside a liquid storage tank 9, the liquid storage tank 9 being located below the base plate 5, and the base plate 5 and the liquid storage tank 9 being fixedly connected by a support plate 10; and a second heat dissipation mechanism located inside the support plate 10, the second heat dissipation mechanism cooling the lower mold 3 by air cooling.

[0018] Existing injection molds mostly employ a single heat dissipation structure to cool the mold during processing, resulting in low cooling efficiency and significant time consumption. There is a lack of methods that combine multiple heat dissipation structures for effective cooling, such as… Figures 1-2 , Figure 5 and Figure 7As shown, the first heat dissipation mechanism includes heat dissipation channels 6 formed within the base plate 5. These channels are distributed at equal angles around the central axis of the base plate 5 and are curved. A connecting channel 7, which is circular, is provided at the ends of the heat dissipation channels 6 that are furthest from each other. The center of the base plate 5 is connected to the inner bottom surface of the storage tank 9 via a liquid infusion pipe 8. The end of the liquid infusion pipe 8 furthest from the base plate 5 is connected to a liquid pump, and the liquid infusion pipe 8 is fixed between the storage tank 9 and the base plate 5. A partition plate 12 is fixed inside the storage tank 9, and coolant is stored above and below the partition plate 12. Fixing holes 11 are evenly spaced on the upper surface of the storage tank 9, and return water pipes are evenly spaced on the sides of the storage tank 9. 13, and the spaces above and below the partition plate 12 are interconnected by the return water pipe 13; the first heat dissipation mechanism also includes a servo motor 14 installed at the end of the support plate 10, and the output shaft of the servo motor 14 is connected to a reciprocating lead screw 15, and the two reciprocating lead screws 15 are interconnected by a pulley mechanism. At the same time, the ends of the reciprocating lead screw 15 and the movable plate 16 are threadedly connected, and the movable plate 16 slides against the side of the support plate 10; the upper end face of the movable plate 16 is provided with liquid outlet holes 17 at equal intervals, and the movable plate 16 is symmetrically distributed about the base plate 5, and the side of the movable plate 16 is fixedly connected to one end of the hose 18, while the other end of the hose 18 is fixed to the base plate 5; one end of the hose 18 is connected to the fixed channel 19 and The connecting channels 7 are interconnected, and the other end of the hose 18 is connected to the movable plate 16. The fixed channel 19 is set inside the base plate 5. When the mold is being injection molded, the coolant can be transferred to the heat dissipation channel 6 through the infusion pump in the liquid storage tank 9. Therefore, the coolant flows from the center to the surrounding area, which can evenly absorb the heat at the bottom of the mold 3. The coolant can increase the flow distance in the curved heat dissipation channel 6, thereby absorbing more heat. The liquid that has absorbed heat flows to the connecting channels 7 for collection, and then enters the hose 18 through the fixed channel 19. After that, the liquid is transferred to the movable plate 16 and discharged from the outlet hole 17, spraying onto the lower end face of the base plate 5. This is done by spraying. Further cooling is achieved by spraying the heat-absorbing liquid, which then disperses and falls to dissipate heat. At this time, the servo motor 14 drives the reciprocating screw 15 to rotate. Through the threaded transmission between the reciprocating screw 15 and the movable plate 16, the two movable plates 16 can be moved back and forth, so that the liquid can be evenly sprayed on the lower end surface of the base plate 5, improving the heat dissipation effect. Afterwards, the liquid flows through the fixing hole 11 to the space above the partition plate 12 for storage. When the liquid above the partition plate 12 reaches a certain amount, it can flow through the return water pipe 13 to the space below the partition plate 12. At this time, the heat-absorbing coolant is also sufficiently cooled and flows to the bottom of the liquid storage tank 9 for circulation. Therefore, it can avoid the circulating coolant still being at a high temperature.

[0019] Example 2: In existing injection molds, the coolant is recycled after absorbing heat, but the temperature remains high, thus failing to achieve effective heat dissipation. The cooling process for the coolant after heat absorption is inadequate. Therefore, this example addresses this issue through the following technical solution: Figures 4-8 and Figure 8 As shown, the second heat dissipation mechanism includes a fan blade 20 fixedly mounted on a reciprocating lead screw 15, and a protective cover 21 is fitted around the outside of the fan blade 20. The protective cover 21 is fixed to the support plate 10, and the protective cover 21 is interconnected with the interior of the fixed cavity 22 through a pipe. The fixed cavity 22 is located inside the support plate 10. The fixed cavities 22 in the two support plates 10 are connected by a connecting pipe 23, and the fixed cavities 22 are connected to the air supply channel 24 and the air nozzles 25. The air nozzles 25 are fixed at equal intervals to the support plates 10. On the side, the nozzle 25 has a "V" shaped structure; when the reciprocating screw 15 rotates, it can drive the fan blade 20 to rotate synchronously. The resulting air force can be transmitted to the fixed cavity 22, and then transmitted to different fixed cavities 22 through the connecting pipe 23. After that, it is transmitted to the nozzle 25 through the air supply channel 24. Part of the gas is blown towards the lower end face of the base plate 5 to improve the heat dissipation effect through gas, and another part of the gas is blown towards the fixed hole 11 to dissipate the heat absorbed by the coolant so that it can be recycled later.

[0020] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An injection mold with a water cooling channel, comprising an upper mold (1), wherein an injection hole (2) is provided on the top of the upper mold (1), and a lower mold (3) is installed below the upper mold (1), and a molding cavity (4) is provided between the lower mold (3) and the upper mold (1). Its features are, Also includes: The base plate (5) is fixed to the lower end face of the lower mold (3). The base plate (5) is provided with a first heat dissipation mechanism, which cools the lower mold (3) by liquid cooling. The first heat dissipation mechanism is connected to the coolant inside the liquid storage tank (9). The liquid storage tank (9) is located below the base plate (5). The base plate (5) and the liquid storage tank (9) are fixedly connected by a support plate (10). The second heat dissipation mechanism is located on the inner side of the support plate (10). The second heat dissipation mechanism cools the lower mold (3) by means of air cooling.

2. The injection mold with a water-cooling channel according to claim 1, characterized in that: The first heat dissipation mechanism includes a heat dissipation channel (6) opened in the base plate (5), and the heat dissipation channel (6) is distributed at equal angles with the central axis of the base plate (5) as the center. The heat dissipation channel (6) is curved, and a connecting channel (7) is provided at the ends of the heat dissipation channels (6) that are far apart from each other. The connecting channel (7) is a circular structure.

3. The injection mold with a water-cooling channel according to claim 2, characterized in that: The center of the base plate (5) is connected to the inner bottom surface of the storage tank (9) through the infusion pipe (8), and the end of the infusion pipe (8) away from the base plate (5) is connected to the infusion pump, and the infusion pipe (8) is fixed between the storage tank (9) and the base plate (5).

4. The injection mold with a water-cooling channel according to claim 1, characterized in that: The liquid storage tank (9) is fixed with a partition plate (12) inside, and coolant is stored above and below the partition plate (12). The upper end face of the liquid storage tank (9) is evenly reserved with fixing holes (11). At the same time, return water pipes (13) are fixed at equal intervals on the side of the liquid storage tank (9). The space above and below the partition plate (12) is connected to each other through the return water pipes (13).

5. An injection mold with a water-cooling channel according to claim 1, characterized in that: The first heat dissipation mechanism also includes a servo motor (14) installed at the end of the support plate (10), and the output shaft of the servo motor (14) is connected to a reciprocating lead screw (15), and the two reciprocating lead screws (15) are connected to each other through a pulley mechanism. At the same time, the ends of the reciprocating lead screw (15) and the movable plate (16) are threadedly connected, and the movable plate (16) slides against the side of the support plate (10).

6. An injection mold with a water-cooling channel according to claim 5, characterized in that: The upper surface of the movable plate (16) is provided with liquid outlet holes (17) at equal intervals, and the movable plate (16) is symmetrically distributed about the base plate (5). The side of the movable plate (16) is fixedly connected to one end of the hose (18), while the other end of the hose (18) is fixed to the base plate (5).

7. An injection mold with a water-cooling channel according to claim 6, characterized in that: One end of the hose (18) is connected to the fixed channel (19) and the connecting channel (7), and the other end of the hose (18) is connected to the movable plate (16), and the fixed channel (19) is set in the base plate (5).

8. An injection mold with a water-cooling channel according to claim 5, characterized in that: The second heat dissipation mechanism includes a fan blade (20) fixedly installed on a reciprocating screw (15), and a protective cover (21) is sleeved on the outside of the fan blade (20). The protective cover (21) is fixed on the support plate (10). At the same time, the protective cover (21) is connected to the interior of the fixed cavity (22) through a pipe. The fixed cavity (22) is set inside the support plate (10).

9. An injection mold with a water-cooling channel according to claim 8, characterized in that: The two fixed cavities (22) in the two support plates (10) are connected by a connecting pipe (23), and the fixed cavities (22) are connected by an air supply channel (24) and a jet nozzle (25). The jet nozzles (25) are fixed at equal intervals to the side of the support plate (10), and the jet nozzles (25) have a "V" shaped structure.

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