Cooling mechanism of injection mold

Abstract

The utility model relates to the technical field of injection molds, in particular to a cooling mechanism of an injection mold, which comprises a bottom plate and a water storage barrel, a lower mold and a support plate are fixedly mounted on the surface of the upper end of the bottom plate, an air cylinder is mounted at the top end in the support plate, the bottom end of the air cylinder is fixedly connected with an upper mold, and a feeding pipe is fixedly connected to the surface of the upper end of the upper mold. An inner cavity is formed in the lower die, a circulating pipe is fixedly installed in the inner cavity, the cooling fins and the circulating pipe are arranged to be matched with the refrigerator, heat of all areas in the die can be fully guided out for heat exchange, and insufficient cooling caused by omission is avoided; according to the mold cooling device, water flow continuously and circularly flows in the water storage barrel and the refrigerator, the heated water is cooled and then pumped into the circulating pipe again, the cooling effect on the mold is guaranteed, a gap between the lower mold and the upper mold can be filled, and the situation that the sealing performance of the mold is affected after the mold is closed due to the gap is avoided.

Description

Technical Field

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

[0002] Injection molds are specialized tools used in plastic injection molding processes. They are mainly used to manufacture plastic products of various shapes and sizes. They are made by injecting heated and molten plastic into a mold cavity, which is then cooled and solidified to obtain the finished product. Injection molds play a crucial role in the manufacturing process, enabling the production of high-precision, high-quality, and complex plastic products.

[0003] In the prior art, such as the cooling mechanism for injection molds proposed in patent application number "CN202322395523.8", the water inside the cooler is cooled by cooling fins inside the cooler. The cooled water is then transported to the second cooling tank inside the upper mold by a second water pump at the upper end of the cooler. The cooled water is then transported to the first cooling tank inside the lower mold by a first water pump. Since the cooler, the first water pump and the second water pump are provided on both sides of the support, a circulating cooling system can be formed, which can speed up the molding speed of the injection mold. In addition, the cooled injection mold is easy for workers to handle.

[0004] However, in the aforementioned patent application, water is cooled by a refrigerator and then introduced into a cooling tank to cool the mold. However, the cooling tank has a certain depth, and the amount of water introduced cannot guarantee that it will completely fill the cooling tank. It is easy to miss some areas inside the mold, especially the upper half. It takes a certain amount of time to completely fill the tank, which affects the efficiency of the cooling work and results in poor cooling effect. Moreover, after working for a long time, the refrigerator may become overloaded, which weakens the cooling effect on the water. As a result, the water temperature rises, and the heated water continues to flow into the cooling tank, which also affects the cooling effect on the mold. Utility Model Content

[0005] The purpose of this invention is to provide a cooling mechanism for injection molds to solve the problems mentioned in the background art.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A cooling mechanism for an injection mold includes a base plate and a water storage tank. A lower mold and a support plate are fixedly installed on the upper surface of the base plate. A cylinder is installed at the top of the support plate, and the bottom of the cylinder is fixedly connected to an upper mold. A feeding pipe is fixedly connected to the upper surface of the upper mold. An inner cavity is opened inside the lower mold, and a circulation pipe is fixedly installed inside the inner cavity. Several heat-conducting fins are fixedly connected between the inner wall of the inner cavity and the circulation pipe. A cooler is installed on one side of the water storage tank. A sealing mechanism is provided on the bottom surface of the upper mold. Several heat dissipation grooves are opened through both side walls of the lower mold. Exhaust fans are installed on both outer side walls of the lower mold.

[0008] Preferably, one end of the circulation pipe is fixedly connected to the water storage tank, a second water pump is installed inside the water storage tank, and the output end of the water pump is connected to one end of the circulation pipe. A first water pump is installed on the upper surface of the base plate near the water storage tank, and one end of the first water pump is connected to the other end of the circulation pipe.

[0009] Preferably, the water pump is fixedly connected to a connecting pipe at the end away from the circulation pipe, and the connecting pipe is fixedly connected to the cooler at the end away from the water pump. A return pipe is fixedly connected to the outer wall of the connecting pipe, and the return pipe is fixedly connected to the cooler at the end away from the connecting pipe. A one-way valve is installed on the outer wall of both the return pipe and the connecting pipe near the cooler.

[0010] Preferably, a three-way valve is installed on the outer wall of the circulation pipe near the end of the return pipe, a water inlet pipe and a water outlet pipe are fixedly connected to the outer wall of the cooler, a switch valve is installed on the outer wall of the water inlet pipe, and one end of the water outlet pipe is fixedly connected to the water storage tank.

[0011] Preferably, a temperature sensor is installed on the inner wall of the water storage tank near the lower part, a control module is installed on the outer wall of the water storage tank, a display screen is installed on the outer wall of the control module, and the output terminal of the temperature sensor is electrically connected to the input terminal of the control module.

[0012] Preferably, the sealing mechanism includes two sealing plates and two sealing plates, both of which are fixedly connected to the top of the upper mold. Rubber sealing gaskets are fixedly connected to the two outer side walls of the two sealing plates.

[0013] Preferably, the upper surface of the lower mold has two sealing grooves II and two sealing grooves I. Rubber sealing gaskets II are fixedly connected to the inner sidewalls of the two sealing grooves I. Sealing gasket blocks are fixedly installed inside the sealing grooves I near both ends. The sealing grooves I and the sealing plates II fit together.

[0014] The beneficial effects of this utility model are:

[0015] 1. This utility model, by setting up heat sinks and circulation pipes in conjunction with the cooler, can fully dissipate heat from all areas within the mold, avoiding any leakage and insufficient cooling. When the cooler is overloaded and the cooling effect on the water flow weakens, causing the water temperature to exceed the set value, a temperature sensor, in conjunction with a three-way valve, connects the circulation pipe and the return pipe, allowing the water to continuously circulate within the water storage tank and the cooler until the water temperature drops below the set value. Then, the three-way valve is readjusted to disconnect the return pipe from the circulation pipe, allowing the cooling water to re-enter the circulation pipe within the inner cavity and ensure the cooling effect on the mold.

[0016] 2. The present invention can effectively fill the gap between the sealing plate and the sealing groove by setting the rubber sealing gasket one. The rubber sealing gasket two and the two sealing blocks can effectively fill the gap between the sealing groove and the sealing plate, thereby filling the gap between the lower mold and the upper mold, avoiding the occurrence of gaps that affect the sealing performance after the mold is closed, and avoiding insufficient sealing performance that causes material leakage, resulting in increased burrs and changes in the size of the finished product. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0020] Figure 3 This is a cross-sectional view of the lower mold and the water storage tank in this utility model;

[0021] Figure 4 This is a schematic diagram of the upper mold in this utility model;

[0022] Figure 5 This is a structural schematic diagram of the lower mold in this utility model.

[0023] The attached figures are labeled as follows:

[0024] 1. Base plate; 2. Lower mold; 3. Upper mold; 4. Support plate; 5. Cylinder; 6. Water storage tank; 7. Refrigerator; 8. Water pump one; 9. Circulation pipe; 11. Return pipe; 12. Connecting pipe; 13. Heat-conducting plate; 14. Exhaust fan; 15. Sealing plate one; 16. Rubber sealing gasket one; 17. Sealing groove one; 18. Rubber sealing gasket two; 19. Sealing block; 20. Sealing groove two; 21. Feeding pipe; 22. Control module; 23. Three-way valve; 24. Temperature sensor; 25. Water injection pipe; 26. Inner cavity; 27. Sealing plate two; 28. Water outlet pipe. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] A cooling mechanism for an injection mold, such as Figures 1-5 As shown, the system includes a base plate 1 and a water storage tank 6. A lower mold 2 and a support plate 4 are fixedly installed on the upper surface of the base plate 1. A cylinder 5 is installed at the top inside the support plate 4, and the bottom of the cylinder 5 is fixedly connected to the upper mold 3. A feeding pipe 21 is fixedly connected to the upper surface of the upper mold 3. An inner cavity 26 is opened inside the lower mold 2. A circulation pipe 9 is fixedly installed inside the inner cavity 26. Several heat-conducting plates 13 are fixedly connected between the inner wall of the inner cavity 26 and the circulation pipe 9. A cooler 7 is installed on one side of the water storage tank 6. A sealing mechanism is provided on the bottom surface of the upper mold 3. Several heat dissipation grooves are opened through both sides of the lower mold 2. An exhaust fan 14 is installed on both outer sides of the lower mold 2.

[0027] One end of the circulation pipe 9 is fixedly connected to the water storage tank 6. A second water pump is installed inside the water storage tank 6, and the output end of the water pump is connected to one end of the circulation pipe 9. A first water pump 8 is installed on the upper surface of the base plate 1 near the side of the water storage tank 6, and one end of the first water pump 8 is connected to the other end of the circulation pipe 9.

[0028] A connecting pipe 12 is fixedly connected to the end of the water pump 8 away from the circulation pipe 9, and the end of the connecting pipe 12 away from the water pump 8 is fixedly connected to the refrigerator 7. A return pipe 11 is fixedly connected to the outer wall of the connecting pipe 12, and the end of the return pipe 11 away from the connecting pipe 12 is fixedly connected to the refrigerator 7. A one-way valve is installed on the outer wall of both the return pipe 11 and the connecting pipe 12 near the refrigerator 7. By setting the one-way valve, the water flowing into the refrigerator 7 can be prevented from entering the return pipe 11 and the connecting pipe 12.

[0029] A three-way valve 23 is installed on the outer wall of the circulation pipe 9 near the end of the return pipe 11. A water inlet pipe 25 and a water outlet pipe 28 are fixedly connected to the outer wall of the cooler 7. A switch valve is installed on the outer wall of the water inlet pipe 25. One end of the water outlet pipe 28 is fixedly connected to the water storage tank 6. A temperature sensor 24 is installed on the inner wall of the water storage tank 6 near the lower part. A control module 22 is installed on the outer wall of the water storage tank 6. A display screen is installed on the outer wall of the control module 22. The output end of the temperature sensor 24 is electrically connected to the input end of the control module 22. The temperature sensor 24 can detect the temperature of the water in the water storage tank 6 in real time and transmit the data to the control module 22. The temperature value is displayed on the display screen of the control module 22. The model of the temperature sensor 24 is PT100.

[0030] In use, the cylinder 5 mounted on the support plate 4 drives the upper mold 3 to move downwards, causing the upper mold 3 to close onto the lower mold 2. Then, molten raw material is introduced into the space between the lower mold 2 and the upper mold 3 through the feeding pipe 21. After that, it is left to stand and wait for cooling and molding. During this process, the heat of the raw material is transferred to the circulation pipe 9 through the various connecting pipes 12. At the same time, water is introduced into the cooler 7 through the water injection pipe 25. After the water is cooled by the cooler 7, it enters the water storage tank 6 through the water outlet pipe 28. After the water storage tank 6 is full of water, the switch valve on the water injection pipe 25 is closed. When the water supply is stopped, the cooled water in the storage tank 6 is pumped into the circulation pipe 9 by the second water pump. At the same time, the first water pump 8 is started to draw the cooled water in the circulation pipe 9 into the cooler 7, where it is cooled and then discharged into the storage tank 6. This allows the cooled water in the cooler 7 to circulate in the circulation pipe 9, absorbing and exchanging heat from the raw materials to achieve a good cooling effect. Meanwhile, the exhaust fans 14 exchange heat in the inner cavity 26, effectively dissipating the heat absorbed by the circulation pipe 9, thereby improving the cooling effect on the raw materials.

[0031] Meanwhile, the temperature sensor 24 inside the water storage tank 6 monitors the water flow temperature in real time. When the cooler 7 is overloaded and its cooling effect on the water flow weakens, causing the water flow temperature to be higher than the set value, the set temperature value can be adjusted accordingly based on the injection molded product. The temperature sensor 24 then transmits the signal to the control module 22 and displays the temperature value on the display screen. The operator can adjust the three-way valve 23 to connect the circulation pipe 9 with the return pipe 11, so that the water pumped out by the water pump 8 can flow into the cooler 7 through the return pipe 11, be cooled again, and then flow back to the water storage tank 6 through the outlet pipe 28. This allows the water flow to continuously circulate between the water storage tank 6 and the cooler 7 until the water flow temperature is lower than the set value. Then, the three-way valve 23 is readjusted to disconnect the return pipe 11 from the circulation pipe 9, allowing the cooling water to re-enter the circulation pipe 9 in the inner cavity 26 to circulate, ensuring the cooling effect on the mold.

[0032] The sealing mechanism includes two sealing plates 15 and two sealing plates 27. The two sealing plates 15 and two sealing plates 27 are fixedly connected to the top of the upper mold 3. Rubber sealing gaskets 16 are fixedly connected to the two outer walls of the two sealing plates 15.

[0033] The upper surface of the lower mold 2 has two sealing grooves 20 and two sealing grooves 17. Rubber sealing gaskets 18 are fixedly connected to the inner side walls of the two sealing grooves 17. Sealing blocks 19 are fixedly installed inside the sealing grooves 17 near both ends. The sealing grooves 17 fit with the sealing plate 27, and the sealing plate 15 fits with the sealing grooves 20. The rubber sealing gaskets 18, sealing blocks 19 and rubber sealing gaskets 18 all have good resilience performance, and the two side walls of the rubber sealing gaskets 18 are inclined.

[0034] Specifically, during the process of covering the bottom plate 1 onto the lower mold 2, the sealing plate 15 and sealing plate 27 in the sealing mechanism move downwards. After the upper mold 3 covers the lower mold 2, the two sealing plates 15 are inserted into the two sealing grooves 20 respectively, and the two sealing plates 27 are inserted into the two sealing grooves 17 respectively. Furthermore, when the two rubber sealing gaskets 16 on the sealing plate 15 are inserted into the sealing grooves 20, their inclined surfaces move along the inner wall of the sealing grooves 20 and are gradually compressed, causing deformation. This continues until the sealing plate 15 is fully inserted into the sealing grooves 20. Under the action of the rebound force of the rubber sealing gaskets 16, the sealing plate 15 can effectively... The gap between sealing plate 15 and sealing groove 20 is filled. Similarly, when sealing plate 27 is inserted into sealing groove 17, it moves down along the inclined surface of the two rubber sealing pads 18, which causes the rubber sealing pads 18 to deform. Similarly, with the rebound force of the rubber sealing pads 18 and the cooperation of the two sealing pads 19, the gap between sealing groove 17 and sealing plate 27 can be filled well. This can fill the gap between the lower mold 2 and the upper mold 3, avoid gaps, and prevent the sealing performance after the mold is closed. It can also prevent insufficient sealing performance from causing material leakage, which would lead to increased burrs and changes in the size of the finished product.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A cooling mechanism of an injection mold comprising a base plate (1) and a water storage bucket (6), characterized in that, The bottom plate (1) upper end surface is fixedly installed with lower die (2) and support plate (4), the support plate (4) inside top is installed with pneumatic cylinder (5), and the pneumatic cylinder (5) bottom end is fixedly connected with upper die (3), the upper die (3) upper end surface is fixedly connected with feeding pipe (21), the lower die (2) inside is provided with inner cavity (26), the inner cavity (26) inside is fixedly installed with circulating pipe (9), a plurality of heat conduction fins (13) are fixedly connected between the inner cavity (26) inner wall and circulating pipe (9), the water storage bucket (6) one side is installed with refrigerator (7), the upper die (3) bottom is provided with sealing mechanism, the lower die (2) both side walls are all through and are provided with a plurality of heat dissipation grooves, the lower die (2) both outer side walls are installed with exhaust fan (14).

2. A cooling mechanism for an injection mold according to claim 1, wherein One end of the circulating pipe (9) is fixedly connected with the water storage bucket (6), the water storage bucket (6) is internally provided with a water pump two, and the water pump output end is connected with one end of the circulating pipe (9), the bottom plate (1) upper end surface is installed with water pump one (8) near the water storage bucket (6) one side position, one end of the water pump one (8) is connected with the other end of the circulating pipe (9).

3. A cooling mechanism for an injection mold according to claim 2, wherein The water pump one (8) is fixedly connected with the connecting pipe (12) away from one end of the circulating pipe (9), and the connecting pipe (12) is fixedly connected with the refrigerator (7) away from one end of the water pump one (8), the connecting pipe (12) is fixedly connected with the return pipe (11) outside wall, and the return pipe (11) is fixedly connected with the refrigerator (7) away from one end of the connecting pipe (12), the return pipe (11) and the connecting pipe (12) are installed with one-way valve outside wall near one end of the refrigerator (7).

4. The cooling mechanism of an injection mold according to claim 2, wherein The circulating pipe (9) is installed with three-way valve (23) outside wall near one end of the return pipe (11), the refrigerator (7) is fixedly connected with water injection pipe (25) and water outlet pipe (28) outside wall, the water injection pipe (25) is installed with switch valve outside wall, one end of the water outlet pipe (28) is fixedly connected with the water storage bucket (6).

5. The cooling mechanism of an injection mold according to claim 1, wherein The temperature sensor (24) is installed on the inner wall of the water storage bucket (6) near the lower part, the control module (22) is installed on the outer wall of the water storage bucket (6), the display screen is installed on the outer wall of the control module (22), and the output end of the temperature sensor (24) is electrically connected with the input end of the control module (22).

6. The cooling mechanism of an injection mold according to claim 1, wherein The sealing mechanism comprises two sealing plates one (15) and two sealing plates two (27), two sealing plates one (15) and two sealing plates two (27) are fixedly connected at the inner top of the upper die (3), and two sealing plates one (15) are fixedly connected with rubber sealing gasket one (16) on both outer side walls.

7. A cooling mechanism for an injection mold according to claim 6, wherein Two sealing grooves two (20) and two sealing grooves one (17) are formed on the upper end surface of the lower die (2), two sealing grooves one (17) are fixedly connected with rubber sealing gasket two (18) on both inner side walls, sealing pad blocks (19) are fixedly installed in the sealing grooves one (17) near both ends, the sealing grooves one (17) are matched with the sealing plates two (27), and the sealing plates one (15) are matched with the sealing grooves two (20).

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