Local high-efficiency cooling injection mold

Abstract

This utility model discloses a locally efficient cooling injection mold, relating to the field of injection mold cooling technology. It includes a fixed mold base plate and a moving mold base plate. A moving mold base plate is positioned above the fixed mold base plate. A cooling cavity is formed inside the moving mold base plate, and a heat dissipation cavity is formed inside the moving mold base plate at the outer end of the cooling cavity. A cooling water tank is positioned on one side of the fixed mold base plate, and a water pump is installed above the cooling water tank. A first connecting sleeve is connected to the middle of the water pump. This locally efficient cooling injection mold uses the water pump to pump coolant from the cooling water tank into a cooling needle through the first connecting sleeve. The coolant circulates within the space formed by the cooling needle and the cooling sleeve, absorbing heat from the mold before returning through a second connecting sleeve, achieving localized cooling. The heat dissipation fins increase the heat dissipation area of ​​the cooling sleeve, and together with the cooling cavity and heat dissipation cavity, accelerate heat dissipation, effectively shorten the injection molding cycle, reduce plastic product deformation, and improve product quality.

Description

Technical Field

[0001] This utility model relates to the field of injection mold cooling technology, specifically to a localized and efficient cooling injection mold. Background Technology

[0002] Injection molds are an indispensable tool in the modern plastics processing industry, widely used in the production of various plastic products. As market demands for product performance and quality continue to rise, injection molding technology is also constantly evolving and improving. However, in practical applications, the complexity of different product designs and variations in material properties present numerous challenges during the injection molding process, especially when dealing with products of uneven thickness, where heat dissipation becomes a particularly prominent issue.

[0003] However, existing injection molds still have certain problems in use:

[0004] An existing rapid cooling injection mold, such as one described in application number CN201721063616.9, includes a fixed end mounting plate and a serpentine cooling pipe. The fixed end mounting plate has a main injection runner at its inner center, and injection branch runners are provided on both sides of the bottom end of the main injection runner. A mold partition is provided outside the injection branch runners, and a mold partition cooling pipe is provided on the mold partition. A fixed plate cooling pipe is provided above the mold partition cooling pipe.

[0005] Existing injection mold cooling systems typically employ a relatively regular cooling channel layout, making it difficult to precisely cool different parts of the mold to meet their heat dissipation needs. This is especially true for thicker parts, which prevent timely solidification and can lead to incomplete solidification, thus affecting the quality and stability of the final product.

[0006] Therefore, we propose a locally efficient cooling injection mold to solve the problems mentioned above. Utility Model Content

[0007] The purpose of this invention is to provide a locally efficient cooling injection mold to solve the problem mentioned in the background art. The injection mold cooling system usually adopts a relatively regular cooling channel layout, which makes it difficult to accurately cool the heat dissipation needs of different parts of the mold. In particular, for thicker parts, it is difficult to solidify in time, which easily leads to incomplete solidification and thus affects the quality and stability of the final product.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a locally efficient cooling injection mold, comprising a fixed mold base plate and a moving mold base plate:

[0009] A moving mold base plate is provided above the fixed mold base plate. A cooling cavity is formed inside the moving mold base plate. A heat dissipation cavity is formed inside the moving mold base plate and at the outer end of the cooling cavity. A cooling water tank is provided on one side of the fixed mold base plate. A water pump is installed above the cooling water tank. A first connecting sleeve is connected to the middle of the water pump. A cooling needle is connected to the top of the first connecting sleeve. A cooling sleeve is fitted on the outer surface of the cooling needle. A plurality of heat dissipation fins are provided on the outer surface of the cooling sleeve. A second connecting sleeve is connected to the other end of the cooling needle.

[0010] Using the above technical solution, the coolant in the cooling water tank is pumped into the cooling needle through the first connecting sleeve by a water pump. The coolant circulates in the space formed by the cooling needle and the cooling sleeve, absorbs the heat of the mold, and then flows back through the second connecting sleeve to achieve local cooling. The heat dissipation fins increase the heat dissipation area of ​​the cooling sleeve, and together with the cooling cavity and the heat dissipation cavity, accelerate the heat dissipation, effectively shorten the injection molding cycle, reduce the deformation of plastic products, and improve product quality.

[0011] Preferably, the upper end face of the fixed mold base plate is recessed with a fixed template, the four corners of the fixed mold base plate are embedded with guide sleeves, the lower end face of the moving mold base plate is convex with a moving template, and the four corners of the moving mold base plate are fixed with guide posts.

[0012] Using the above technical solution, the fixed mold base plate and the moving mold base plate are respectively equipped with a concave fixed mold plate and an convex moving mold plate, which cooperate with each other to form an injection cavity for molding plastic products. The guide sleeve and guide post are respectively installed at the four corners of the fixed mold base plate and the moving mold base plate. During the mold opening and closing process, the guide post slides along the guide sleeve, which plays a role in precise guidance and positioning, ensuring that the fixed mold plate and the moving mold plate close accurately, and ensuring the molding accuracy and quality of the plastic products.

[0013] Preferably, the heat dissipation fins have a wavy structure and are evenly distributed laterally along the outer surface of the cooling jacket.

[0014] The above technical solution uses a wave-shaped structure for the heat dissipation fins, which can increase the contact area with the coolant and the air around the mold, extend the heat exchange path, and improve the heat transfer efficiency. The fins are evenly distributed on the outside of the cooling jacket, which can ensure balanced heat dissipation in all parts, effectively avoid local overheating, accelerate the cooling speed of local areas of the mold, and improve injection molding efficiency and product quality.

[0015] Preferably, the bottom end of the second connecting sleeve is connected to a recycling water tank, and a discharge port is provided on one side of the recycling water tank.

[0016] Using the above technical solution, the cooled coolant flows into the recovery tank through the second connecting sleeve, realizing the recycling and reuse of the coolant. The outlet on one side of the recovery tank is used to discharge impurities generated during the cooling process or to replace the coolant periodically, so as to ensure the normal operation and cooling effect of the cooling system.

[0017] Preferably, a connecting mechanism is provided at the connection between the first connecting sleeve and the cooling needle, and the end of the cooling needle is connected to the second connecting sleeve through the connecting mechanism.

[0018] Using the above technical solution, the connecting mechanism plays a role in sealing and securing the connection at the connection between the first connecting sleeve and the cooling needle, as well as at the connection between the cooling needle and the second connecting sleeve, ensuring that the coolant will not leak when flowing in the pipeline, thus achieving reliable connection.

[0019] Preferably, the connecting mechanism includes a first connector rotatably connected to the top end of the first connecting sleeve, the first connector being hollow and having an external thread structure; the connecting mechanism also includes a second connector fixedly connected to one end of the cooling needle, the second connector having an internal thread structure; and the first and second connectors are connected by corresponding threads.

[0020] By adopting the above technical solution, the connecting mechanism is connected by the corresponding external thread of the first connecting member and the internal thread of the second connecting member, so as to realize the stable connection between the first connecting sleeve and the cooling needle. This not only makes installation convenient, but also ensures the sealing of the connection through the tight fit of the threads, prevents coolant leakage, and ensures the efficient and stable operation of the cooling system.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. The coolant in the cooling water tank is pumped into the cooling needle through the first connecting sleeve by a water pump. The coolant circulates in the space formed by the cooling needle and the cooling sleeve. After absorbing the heat of the mold, it flows back through the second connecting sleeve to achieve local cooling. The heat dissipation fins increase the heat dissipation area of ​​the cooling sleeve. Together with the cooling cavity and the heat dissipation cavity, they accelerate the heat dissipation, effectively shorten the injection molding cycle, reduce the deformation of plastic products, and improve product quality.

[0023] 2. The connecting mechanism connects the external thread of the first connector with the internal thread of the second connector, thereby achieving a stable connection between the first connecting sleeve and the cooling needle. This not only makes installation convenient, but also ensures the sealing of the connection through the tight fit of the threads, preventing coolant leakage and ensuring the efficient and stable operation of the cooling system. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the external structure of this utility model from the front view;

[0025] Figure 2This is a schematic diagram showing the disassembled structure of the fixed mold base plate and the moving mold base plate of this utility model;

[0026] Figure 3 This is a schematic diagram of the internal partial cooling structure of the moving mold base plate of this utility model;

[0027] Figure 4 This is a schematic diagram of the connection mechanism of this utility model;

[0028] Figure 5 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0029] In the diagram: 1. Fixed mold base plate; 2. Fixed template; 3. Guide sleeve; 4. Moving mold base plate; 5. Moving template; 6. Guide pillar; 7. Cooling cavity; 8. Heat dissipation cavity; 9. Cooling water tank; 10. Water pump; 11. First connecting sleeve; 12. Cooling pin; 13. Cooling sleeve; 14. Heat dissipation fins; 15. Second connecting sleeve; 16. Recycle water tank; 17. Discharge port; 18. Connecting mechanism; 1801. First connecting piece; 1802. Second connecting piece. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0031] Please see Figures 1-5 This utility model provides a technical solution: a locally efficient cooling injection mold, including a fixed mold base plate 1 and a moving mold base plate 4. The moving mold base plate 4 is arranged above the fixed mold base plate 1. A cooling cavity 7 is formed inside the moving mold base plate 4. A heat dissipation cavity 8 is formed inside the moving mold base plate 4 and at the outer end of the cooling cavity 7. A cooling water tank 9 is arranged on one side of the fixed mold base plate 1. A water pump 10 is installed above the cooling water tank 9. A first connecting sleeve 11 is connected to the middle of the water pump 10. A cooling needle 12 is connected to the top of the first connecting sleeve 11. A cooling sleeve 13 is fitted on the outer surface of the cooling needle 12. A plurality of heat dissipation fins 14 are arranged on the outer surface of the cooling sleeve 13. A second connecting sleeve 15 is connected to the other end of the cooling needle 12. The heat dissipation fins 14 have a wavy structure and are evenly distributed laterally along the outer surface of the cooling sleeve 13. A recovery water tank 16 is connected to the bottom end of the second connecting sleeve 15. A discharge port 17 is provided on one side of the recovery water tank 16.

[0032] The fixed mold base plate 1 and the moving mold base plate 4 constitute the main body of the mold. The cooling cavity 7 and heat dissipation cavity 8 inside the moving mold base plate 4 provide basic space for cooling and heat dissipation. The coolant in the cooling water tank 9 flows into the cooling needle 12 through the first connecting sleeve 11 under the action of the water pump 10. The cooling sleeve 13 outside the cooling needle 12 and the wave-shaped heat dissipation fins 14 arranged horizontally and evenly on it increase the heat exchange area and efficiently absorb the local heat of the mold. The heated coolant then flows into the recovery water tank 16 through the second connecting sleeve 15 to complete the cooling cycle. The outlet 17 is used to discharge impurities in the recovery water tank 16 or replace the coolant to ensure the stable operation of the cooling system, thereby achieving efficient cooling of the local area of ​​the mold, effectively shortening the injection molding cycle, reducing deformation and defects of plastic products caused by uneven cooling, and improving product quality and production efficiency.

[0033] The fixed mold base plate 1 has a recessed fixed template 2 on its upper end surface, and guide sleeves 3 are embedded in the four corners of the fixed mold base plate 1. The moving mold base plate 4 has a protruding moving template 5 on its lower end surface, and guide posts 6 are fixed at the four corners of the moving mold base plate 4.

[0034] The fixed mold base plate 1 and the moving mold base plate 4 are respectively provided with a concave fixed mold plate 2 and an outward convex moving mold plate 5. The two cooperate with each other to form an injection cavity for molding plastic products. The guide sleeve 3 and the guide post 6 are respectively installed at the four corners of the fixed mold base plate 1 and the moving mold base plate 4. During the mold opening and closing process, the guide post 6 slides along the guide sleeve 3, which plays a role in precise guidance and positioning, ensuring that the fixed mold plate 2 and the moving mold plate 5 are accurately closed, and ensuring the molding accuracy and quality of the plastic products.

[0035] A connecting mechanism 18 is provided at the connection between the first connecting sleeve 11 and the cooling needle 12, and the end of the cooling needle 12 is connected to the second connecting sleeve 15 through the connecting mechanism 18. The connecting mechanism 18 includes a first connecting member 1801 rotatably connected to the top end of the first connecting sleeve 11, and the first connecting member 1801 is hollow and has an external thread structure. The connecting mechanism 18 also includes a second connecting member 1802 fixedly connected to one end of the cooling needle 12, and the second connecting member 1802 has an internal thread structure. The first connecting member 1801 and the second connecting member 1802 are connected by corresponding threads.

[0036] Connection mechanisms 18 are provided at the connection points of the first connecting sleeve 11 and the cooling pin 12, and between the cooling pin 12 and the second connecting sleeve 15. The first connecting member 1801 of the connection mechanism 18 has a hollow external thread structure and is rotatably connected to the top of the first connecting sleeve 11. The second connecting member 1802 has an internal thread structure and is fixedly connected to both ends of the cooling pin 12. By screwing the threads of the first connecting member 1801 and the second connecting member 1802, a stable connection between the components is achieved, ensuring that the coolant flows smoothly in the channel formed by the first connecting sleeve 11, the cooling pin 12, and the second connecting sleeve 15. The tightness of the threaded connection effectively prevents coolant leakage and facilitates disassembly and installation. When it is necessary to repair or replace components such as the cooling pin 12, the operation can be quickly completed by rotating the thread, ensuring the stable operation of the cooling system. This provides a reliable connection basis for the efficient local cooling of the mold, helping to improve injection molding efficiency and product quality.

[0037] Working principle: For this type of localized high-efficiency cooling injection mold, during operation, the fixed mold plate 2 with its concave upper end face and the moving mold plate 5 with its convex lower end face cooperate to form an injection cavity for molding plastic products. The coolant in the cooling water tank 9, driven by the water pump 10, flows into the cooling needle 12 through the first connecting sleeve 11. The cooling sleeve 13 on the outer surface of the cooling needle 12 and the wave-shaped heat dissipation fins 14 arranged horizontally on its outer surface increase the heat exchange area and efficiently absorb local heat from the mold. The heated coolant then enters the recovery water tank 16 through the second connecting sleeve 15 at the other end of the cooling needle 12 to complete the cooling cycle. The outlet 17 on one side of the recovery water tank 16 is used to discharge impurities or replace the coolant.

[0038] This completes a series of tasks. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0039] 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. A localized high-efficiency cooling injection mold, comprising a fixed mold base plate (1) and a moving mold base plate (4), characterized in that: A moving mold base plate (4) is provided above the fixed mold base plate (1). A cooling cavity (7) is provided inside the moving mold base plate (4). A heat dissipation cavity (8) is provided inside the moving mold base plate (4) and at the outer end of the cooling cavity (7). A cooling water tank (9) is provided on one side of the fixed mold base plate (1). A water pump (10) is installed above the cooling water tank (9). A first connecting sleeve (11) is connected to the middle of the water pump (10). A cooling needle (12) is connected to the top of the first connecting sleeve (11). A cooling sleeve (13) is fitted on the outer surface of the cooling needle (12). A plurality of heat dissipation fins (14) are provided on the outer surface of the cooling sleeve (13). A second connecting sleeve (15) is connected to the other end of the cooling needle (12).

2. The localized high-efficiency cooling injection mold according to claim 1, characterized in that: The fixed mold base plate (1) has a fixed template (2) recessed on its upper end surface, and guide sleeves (3) are embedded in the four corners of the fixed mold base plate (1). The moving mold base plate (4) has a moving template (5) protruding on its lower end surface, and guide posts (6) are fixed at the four corners of the moving mold base plate (4).

3. The localized high-efficiency cooling injection mold according to claim 2, characterized in that: The heat dissipation fins (14) have a wavy structure, and the heat dissipation fins (14) are evenly distributed laterally along the outer surface of the cooling sleeve (13).

4. The localized high-efficiency cooling injection mold according to claim 1, characterized in that: The bottom end of the second connecting sleeve (15) is connected to a recycling water tank (16), and a discharge port (17) is provided on one side of the recycling water tank (16).

5. The localized high-efficiency cooling injection mold according to claim 3, characterized in that: A connecting mechanism (18) is provided at the connection between the first connecting sleeve (11) and the cooling needle (12), and the end of the cooling needle (12) is connected to the second connecting sleeve (15) through the connecting mechanism (18).

6. The localized high-efficiency cooling injection mold according to claim 5, characterized in that: The connecting mechanism (18) includes a first connector (1801) rotatably connected to the top end of the first connecting sleeve (11), and the first connector (1801) is hollow and has an external thread structure. The connecting mechanism (18) includes a second connector (1802) fixedly connected to one end of the cooling needle (12), and the second connector (1802) has an internal thread structure. The first connector (1801) and the second connector (1802) are connected by corresponding threads.

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