Injection mold cooling system

Abstract

The utility model relates to the technical field of injection molds, in particular to an injection mold cooling system which comprises a base, a sliding rod is fixedly connected to the base, a bottom plate is slidably arranged on the sliding rod, a lower mold is arranged on the bottom plate, a hydraulic rod used for pushing the bottom plate to move along the sliding rod is arranged on the base, and a top plate is fixedly connected to the top of the sliding rod. An upper mold is arranged on the top plate, the upper mold and the lower mold are respectively provided with a forming cavity, a sprue bush is mounted on the top plate, the sprue bush is communicated with the forming cavity of the upper mold, a plurality of heat conduction pipes are inserted into the upper mold and the lower mold at intervals, one end of each heat conduction pipe is processed to form a large-head end, and the other end of each heat conduction pipe is processed to form a small-head end. Cooling cavities are formed in the top plate and the bottom plate, the large-head ends are located in the cooling cavities, the top plate and the bottom plate are jointly connected with a circulating assembly, and the effects that the cooling speed of plastic parts in the injection mold is increased, and the injection molding work efficiency is improved are achieved.

Description

Technical Field

[0001] This application relates to the technical field of injection molds, especially the cooling system of injection molds. Background Art

[0002] Injection molding, as an important method in the production and shaping of industrial products, is usually used to manufacture some products such as plastics and rubbers. Injection molding usually uses injection molds. In order to improve the injection efficiency of products, after injection molding is completed, it is usually necessary to cool the injection mold through a cooling system, so as to promote the rapid molding of products.

[0003] The existing injection mold cooling system is usually a cooling water channel. By setting a water channel at the outer edge of the injection mold close to the plastic part, the plastic part in the mold is cooled by the water flow circulation in the water channel.

[0004] The above-mentioned existing technical solutions have the following defects: the traditional cooling water channel is prone to cooling dead angles, resulting in a relatively slow solidification speed of the plastic part, reducing the injection molding work efficiency. Content of the Utility Model

[0005] This application provides a cooling system for injection molds in order to improve the cooling speed of plastic parts in the injection mold and improve the injection molding work efficiency.

[0006] The above technical objectives of this application are achieved through the following technical solutions:

[0007] A cooling system for an injection mold, including a base, a sliding rod is fixedly connected to the base, a bottom plate is slidably arranged on the sliding rod, a lower mold is arranged on the bottom plate, a hydraulic rod for pushing the bottom plate to move along the sliding rod is arranged on the base, a top plate is fixedly connected to the top of the sliding rod, an upper mold is arranged on the top plate, forming cavities are opened in both the upper mold and the lower mold, a sprue bushing is installed on the top plate, the sprue bushing is communicated with the forming cavity of the upper mold, heat conduction tubes are inserted into both the upper mold and the lower mold, a plurality of heat conduction tubes are arranged at intervals, and one end of the heat conduction tube is processed into a large head end, cooling cavities are opened in both the top plate and the bottom plate, the large head end is located in the cooling cavity, and a circulation component is jointly connected between the top plate and the bottom plate.

[0008] By adopting the above technical solution, the circulating flow of the coolant reduces the temperature of the large head end of the heat conduction tube. At the same time, the heat conduction tube continuously conducts the heat of the upper mold and the lower mold to the large head end. Through a plurality of heat conduction tubes inserted into the upper mold or the lower mold, continuous heat exchange with the circulating coolant is carried out, reducing the temperature of the upper mold and the lower mold, improving the cooling speed of the plastic part in the injection mold, and improving the injection molding work efficiency.

[0009] Optionally, the circulation component includes a water tank, a water pump is installed in the water tank, at least two water inlet pipes are connected to the water outlet end of the water pump, the two water inlet pipes are respectively connected to the top plate and the bottom plate, and respectively communicate with the two cooling chambers, the top plate and the bottom plate are both connected with a water outlet pipe, one end of the water outlet pipe communicates with the cooling chamber, and the other end communicates with the water tank.

[0010] By adopting the above technical solution, the coolant in the water tank flows into the cooling chamber through the water inlet pipe, and after flowing through the cooling chamber, the coolant is discharged into the water tank through the water outlet pipe, so that the injection mold continuously exchanges heat with the circulating coolant, reduces the temperatures of the upper mold and the lower mold, increases the cooling speed of the plastic part in the injection mold, and improves the injection working efficiency.

[0011] Optionally, a fixing block for fixing the sprue bushing is formed in the cooling chamber of the top plate.

[0012] By adopting the above technical solution, the temperature of the fixing block is reduced and the temperature of the sprue bushing is reduced, the molding speed of the plastic in the sprue bushing is increased, the plastic part is cooled and demolded conveniently, and the injection working efficiency is improved.

[0013] Optionally, heat equalizing chambers are respectively formed in the upper mold and the lower mold, a plurality of heat conducting pipes arranged in the upper mold or the lower mold communicate with the heat equalizing chambers, and a heat conducting liquid is filled in the heat equalizing chambers.

[0014] By adopting the above technical solution, the heat conducting liquid in the heat equalizing chamber can balance the temperatures of the heat conducting pipes communicated with the same heat equalizing chamber, so that the heat conducting pipes can uniformly cool the injection mold, increases the cooling speed of the plastic part in the injection mold, and improves the injection working efficiency.

[0015] Optionally, a baffle is arranged in the cooling chamber.

[0016] By adopting the above technical solution, the flow direction of the coolant can be guided, so that the coolant can uniformly cool the heat conducting pipes in the cooling chamber, increases the cooling speed of the plastic part in the injection mold, and improves the injection efficiency.

[0017] Optionally, one end of the heat conducting pipe is formed into a protruding cone.

[0018] By adopting the above technical solution, the contact area between the heat conducting pipe and the coolant can be increased, the heat exchange efficiency of the heat conducting pipe is improved, the cooling speed of the plastic part in the injection mold is increased, and the injection working efficiency is improved.

[0019] Optionally, a water filling pipe and a drain pipe are connected to the water tank, and the water filling pipe is located at the bottom of the water tank.

[0020] By adopting the above technical solution, it is convenient for the staff to replace the coolant in time, so as to improve the heat exchange efficiency of the coolant and ensure the cooling efficiency of the injection mold cooling system for the injection mold during multiple consecutive injection molding operations.

[0021] Optionally, positioning plates are fixedly connected to both the top plate and the bottom plate, and the positioning plates are attached to the upper mold or the lower mold.

[0022] By adopting the above technical solution, the stability of the fixation of the upper mold and the lower mold can be increased, and at the same time, it is ensured that the upper mold and the lower mold will not slide due to the pressure of the injection molding machine during the injection molding process, and even damage to the heat conduction tube will not occur.

[0023] Optionally, a sealing block is formed in the heat equalizing cavity, and the sealing block is sleeved on the peripheral wall of the heat conduction tube.

[0024] By adopting the above technical solution, it is possible to prevent the heat conduction liquid in the heat equalizing cavity from flowing out along the peripheral wall of the heat conduction tube, and ensure the normal operation of the injection mold cooling system.

[0025] In summary, the present application has the following technical effects:

[0026] 1. By providing a heat conduction tube, a cooling cavity and a circulation component, the injection mold can continuously exchange heat with the circulating coolant, reduce the temperature of the upper mold and the lower mold, increase the cooling speed of the plastic parts in the injection mold, and improve the injection molding work efficiency;

[0027] 2. By providing a heat equalizing cavity, the heat conduction tube can evenly cool the injection mold, increase the cooling speed of the plastic parts in the injection mold, and improve the injection molding work efficiency;

[0028] 3. By providing a baffle plate, the coolant can evenly cool the heat conduction tube in the cooling cavity, increase the cooling speed of the plastic parts in the injection mold, and improve the injection efficiency. Description of the Drawings

[0029] Figure 1 is the external shape structure diagram of the present application;

[0030] Figure 2 is the vertical sectional structure diagram of the present application;

[0031] Figure 3 is the horizontal sectional structure diagram of the bottom plate and the top plate of the present application.

[0032] Description of reference numerals: 1, base; 2, sliding rod; 3, bottom plate; 31, lower mold; 4, hydraulic rod; 5, top plate; 51, upper mold; 6, nozzle sleeve; 7, molding cavity; 8, cooling cavity; 9, heat conduction tube; 91, large head end; 10, water tank; 11, water pump; 12, water inlet pipe; 13, water outlet pipe; 14, fixing block; 15, heat equalizing cavity; 16, baffle; 17, water filling pipe; 18, drain pipe; 19, positioning plate; 20, sealing block. Detailed implementation manners

[0033] The following further elaborates on this application with reference to the accompanying drawings.

[0034] The embodiment of this application discloses an injection mold cooling system. Referring to Figure 1 and Figure 2 the injection mold cooling system includes a rectangular base 1. A sliding rod 2 is welded on the base 1. The length direction of the sliding rod 2 is perpendicular to the top surface of the base 1 and there are two of them. The two sliding rods 2 are respectively arranged at both ends of the midline in the length direction of the base 1. A bottom plate 3 is sleeved on the two sliding rods 2 together. The bottom plate 3 is slidably arranged on the sliding rod 2. A hydraulic rod 4 for pushing the bottom plate 3 to move along the sliding rod 2 is arranged on the base 1. There are two hydraulic rods 4 arranged at intervals along the midline in the length direction of the base 1. A lower mold 31 is fixedly connected to the bottom plate 3 by bolts. Two sliding rods 2 are welded at the top with a top plate 5. An upper mold 51 is fixedly connected to the bottom surface of the top plate 5 by bolts. A nozzle sleeve 6 is inserted into the top plate 5.

[0035] Molding cavities 7 are opened on the opposite sides of the upper mold 51 and the lower mold 31. The bottom of the nozzle sleeve 6 is communicated with the molding cavity 7 of the upper mold 51. Heat conduction tubes 9 are inserted into both the upper mold 51 and the lower mold 31. There are multiple heat conduction tubes 9 arranged at intervals. One end of the heat conduction tube 9 is processed to form a large head end 91 with a larger diameter. Cooling cavities 8 are opened in both the top plate 5 and the bottom plate 3. The large head end 91 of the heat conduction tube 9 is inserted into the cooling cavity 8 of the top plate 5 or the bottom plate 3 close to it, and the large head end 91 of the heat conduction tube 9 is inserted into the cooling cavities 8 in the top plate 5 and the bottom plate 3 connected to it.

[0036] A water tank 10 is arranged on one side of the base 1. A water pump 11 is installed in the water tank 10. The water outlet end of the water pump 11 is connected with a water inlet pipe 12. In this embodiment, the water inlet pipe 12 is made of a flexible pipe. There are two water inlet pipes 12. The ends of the two water inlet pipes 12 far from the water pump 11 are respectively connected to the side walls of the top plate 5 and the bottom plate 3. The water inlet pipe 12 is communicated with the cooling cavity 8 of the top plate 5 or the bottom plate 3 it is connected to. Water outlet pipes 13 are connected to both sides of the top plate 5 and the bottom plate 3 where the water inlet pipe 12 is connected. The ends of the water outlet pipes 13 far from the top plate 5 or the bottom plate 3 they are connected to are located in the water tank 10.

[0037] When using the cooling system of this injection mold, extend the hydraulic push rod to push the bottom plate 3 to move along the sliding rod 2 towards the top plate 5 until the lower mold 31 and the upper mold 51 are tightly connected. Start the injection molding machine to make the molten plastic enter the molding cavity 7 of the injection mold composed of the lower mold 31 and the upper mold 51 from the sprue bushing 6. As the high-temperature plastic is injected into the molding cavity 7, the temperatures of the upper mold 51 and the lower mold 31 gradually increase. After the injection is completed, start the water pump 11 to make the coolant in the water tank 10 flow into the cooling cavity 8 through the water inlet pipe 12. After the coolant flows through the cooling cavity 8, it is discharged into the water tank 10 through the water outlet pipe 13. By the circulating flow of the coolant, the temperature of the large-head end 91 of the heat conduction tube 9 is reduced. At the same time, the heat conduction tube 9 continuously conducts the heat of the upper mold 51 and the lower mold 31 to the large-head end 91. Through multiple heat conduction tubes 9 inserted in the upper mold 51 or the lower mold 31, continuous heat exchange with the circulating coolant is carried out to reduce the temperatures of the upper mold 51 and the lower mold 31, improve the cooling speed of the plastic parts in the injection mold, and improve the injection molding work efficiency.

[0038] Refer to Figure 2 and Figure 3 In the cooling cavity 8 of the top plate 5, a fixing block 14 for fixing the sprue bushing 6 is machined. The top surface and the bottom surface of the fixing block 14 are connected to the inner wall of the cooling cavity 8. An installation hole for installing the sprue bushing 6 is opened at the position where the fixing block 14 is machined on the top plate 5. The inner wall diameter of the installation hole matches the diameter of the sprue bushing 6.

[0039] When using the cooling system of this injection mold, the sprue bushing 6 is inserted into the installation hole, and the outer wall of the sprue bushing 6 is in contact with the inner wall of the installation hole. After the injection is completed and the water pump 11 is started, when the coolant flows through the cooling cavity 8 of the upper mold 51, the fixing block 14 reduces the temperature of the sprue bushing 6, improves the molding speed of the plastic in the sprue bushing 6, facilitates the cooling and demolding of the plastic parts, and improves the injection molding work efficiency.

[0040] Refer to Figure 2 In the upper mold 51 and the lower mold 31, heat equalizing cavities 15 are both opened. The heat equalizing cavities 15 are located on the side of the upper mold 51 or the lower mold 31 away from the molding cavity 7, and a plurality of heat conduction tubes 9 inserted in the upper mold 51 or the lower mold 31 are communicated in the heat equalizing cavities 15. The heat equalizing cavities 15 are filled with heat conducting liquid. When using the cooling system of this injection mold, the heat conducting liquid in the heat equalizing cavities 15 can balance the temperatures of the heat conduction tubes 9 connected to the same heat equalizing cavity 15, enable the heat conduction tubes 9 to cool the injection mold evenly, improve the cooling speed of the plastic parts in the injection mold, and improve the injection molding work efficiency.

[0041] Refer to Figure 2 and Figure 3, a baffle 16 is arranged in the cooling cavity 8. The length direction of the baffle 16 is the same as that of the cooling cavity 8. There are three baffles 16 arranged at intervals along the width direction of the cooling cavity 8. The length direction of the baffle 16 is smaller than that of the cooling cavity 8. One ends of the two baffles 16 close to the water inlet pipe 12 and the water outlet pipe 13 are connected to the side wall of the cooling cavity 8 close to the water tank 10, and one end of the other baffle 16 is connected to the side wall of the cooling cavity 8 far from the water tank 10.

[0042] When using this injection mold cooling system, the coolant flows in the cooling cavity 8. The baffle 16 can guide the flow direction of the coolant, so that the coolant can evenly cool the heat conduction pipes 9 in the cooling cavity 8, improve the cooling speed of the plastic parts in the injection mold, and improve the injection efficiency.

[0043] Refer to Figure 2 , one end of the heat conduction pipe 9 located in the cooling cavity 8 is processed to form a protruding cone. When using this injection mold cooling system, the coolant flows in the cooling cavity 8. One end of the heat conduction pipe 9 processed to form a protruding cone can increase the contact area between the heat conduction pipe 9 and the coolant, improve the heat exchange efficiency of the heat conduction pipe 9, improve the cooling speed of the plastic parts in the injection mold, and improve the injection working efficiency.

[0044] Refer to Figure 1 , a water filling pipe 17 and a drain pipe 18 are connected to one side of the water tank 10 far from the base 1, and the water filling pipe 17 is located at the bottom of the water tank 10. When using this injection mold cooling system, coolant can be injected into the water tank 10 through the water filling pipe 17, and at the same time, the excess coolant in the water tank 10 flows out from the drain pipe 18, which is convenient for the staff to replace the coolant in time, so as to improve the heat exchange efficiency of the coolant and ensure the cooling efficiency of the injection mold cooling system for the injection mold during multiple consecutive injection operations.

[0045] Refer to Figure 1 and Figure 2 , positioning plates 19 are welded on the opposite sides of the top plate 5 and the bottom plate 3. There are two positioning plates 19 arranged at intervals along the length direction of the top plate 5 or the bottom plate 3 where they are located, and the side walls of the positioning plates 19 are attached to the side walls of the upper mold 51 or the lower mold 31. When using this injection mold cooling system, the positioning plates 19 can increase the fixing stability of the upper mold 51 and the lower mold 31, and at the same time ensure that the upper mold 51 and the lower mold 31 will not slide due to the pressure of the injection molding machine during the injection process, even causing damage to the heat conduction pipes 9.

[0046] Refer to Figure 2, a sealing block 20 is formed by machining on the inner wall of the soaking cavity 15 near the large head end 91 of the heat conduction tube 9. The sealing block 20 is sleeved on the heat conduction tube 9 and fits with the peripheral wall of the heat conduction tube 9. When the injection mold cooling system is used, as the high-temperature plastic is injected into the molding cavity 7, the temperature in the soaking cavity 15 rises. The sealing block 20 can prevent the heat conduction liquid in the soaking cavity 15 from flowing out along the peripheral wall of the heat conduction tube 9, ensuring the normal operation of the injection mold cooling system.

[0047] This specific embodiment is only an interpretation of the present application and does not limit the present application. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. Injection mold cooling system, characterized by: The injection mold cooling system comprises a base (1), a slide bar (2) is fixedly connected to the base (1), a bottom plate (3) is slidably arranged on the slide bar (2), a lower mold (31) is arranged on the bottom plate (3), a hydraulic rod (4) is arranged on the base (1) for pushing the bottom plate (3) to move along the slide bar (2), a top plate (5) is fixedly connected to the top of the slide bar (2), an upper mold (51) is arranged on the top plate (5), the upper mold (51) and the lower mold (31) are both provided with a molding cavity (7), and a top plate (5) is fixedly connected to the top of the slide bar (2), an upper mold (51) is arranged on the top plate (5), and a molding cavity (7) is formed on the upper mold (51). A sprue sleeve (6) is installed on the plate (5), and the sprue sleeve (6) is connected to the molding cavity (7) of the upper mold (51). Heat conduction pipes (9) are inserted in the upper mold (51) and the lower mold (31). A plurality of heat conduction pipes (9) are arranged at intervals, and one end of the heat conduction pipe (9) is processed to form a large head end (91). A cooling cavity (8) is opened in the top plate (5) and the bottom plate (3), and the large head end (91) is located in the cooling cavity (8). The top plate (5) and the bottom plate (3) are commonly connected to a circulation component.

2. The injection mold cooling system according to claim 1, characterized in that: The circulation component comprises a water tank (10), a water pump (11) is installed in the water tank (10), the water outlet end of the water pump (11) is connected to at least two water inlet pipes (12), the two water inlet pipes (12) are respectively connected to the top plate (5) and the bottom plate (3), and are respectively connected to the two cooling chambers (8), the top plate (5) and the bottom plate (3) are both connected to a water outlet pipe (13), one end of the water outlet pipe (13) is connected to the cooling chamber (8), and the other end is connected to the water tank (10).

3. The injection mold cooling system according to claim 2, characterized in that: A fixing block (14) for fixing the sprue sleeve (6) is formed in the cooling cavity (8) of the top plate (5).

4. The injection mold cooling system according to claim 3, characterized in that: A heat-averaging cavity (15) is provided in both the upper mold (51) and the lower mold (31); the heat-averaging cavity (15) is connected to a plurality of heat-conducting pipes (9) provided in the upper mold (51) or the lower mold (31); and the heat-averaging cavity (15) is filled with heat-conducting liquid.

5. The injection mold cooling system according to claim 4, characterized in that: A baffle (16) is arranged in the cooling chamber (8).

6. The injection mold cooling system according to claim 1, characterized in that: One end of the heat conducting pipe (9) is processed to form a convex cone.

7. The injection mold cooling system according to claim 2, characterized in that: The water tank (10) is connected to a water supply pipe (17) and a drainage pipe (18), and the water supply pipe (17) is located at the bottom of the water tank (10).

8. The injection mold cooling system according to claim 7, characterized in that: A positioning plate (19) is fixedly connected to the top plate (5) and the bottom plate (3), and the positioning plate (19) is fitted with the upper mold (51) or the lower mold (31).

9. The injection mold cooling system according to claim 4, characterized in that: A sealing block (20) is formed in the heat-averaging chamber (15), and the sealing block (20) is sleeved on the peripheral wall of the heat-conducting pipe (9).

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