Cylinder temperature control and heat dissipation structure of injection molding machine

Abstract

The utility model relates to the technical field of injection molding machines, in particular to a temperature control and heat dissipation structure of a machine barrel of an injection molding machine, which comprises a machine barrel body and a water-cooled jacket, the machine barrel body is provided with an inner layer sleeve, a middle layer sleeve and an outer layer sleeve which are coaxially arranged; a first filling cavity used for being filled with inert gas is reserved between the outer wall of the inner-layer sleeve and the inner wall of the middle-layer sleeve, and a second filling cavity used for being filled with inert gas is reserved between the outer wall of the middle-layer sleeve and the inner wall of the outer-layer sleeve. The water-cooled jacket is coaxially arranged outside the outer-layer sleeve in a sleeving manner, and the water-cooled jacket is communicated with a cooling liquid circulating pump. The cooling device has the effects of improving the problem of low natural cooling efficiency and improving the production efficiency of products.

Description

Technical Field

[0001] The present application relates to the technical field of injection molding machines, and in particular to a barrel temperature control and heat dissipation structure of an injection molding machine. Background Art

[0002] The barrel of an injection molding machine, also known as the feed barrel or screw barrel, is a key component for melting and conveying raw materials. After being heated to a fluid state within the barrel, the raw material is extruded by the screw into the mold, where it cools and sets before being ejected from the mold. The inner wall of the barrel directly contacts the raw material and is responsible for heating and melting it, while the outer wall of the barrel needs to be cooled to control the molding temperature and improve molding quality.

[0003] In related technologies, the barrel is usually cooled by natural cooling, which does not require additional equipment and is relatively inexpensive.

[0004] Regarding the above-mentioned related technologies, the natural cooling method of heat dissipation is relatively slow and has low heat dissipation efficiency, which will also affect the production efficiency of the product to a certain extent. Utility Model Content

[0005] In order to improve the problem of low natural cooling efficiency and improve the production efficiency of products, the present application provides a barrel temperature control and heat dissipation structure of an injection molding machine.

[0006] The present application provides a barrel temperature control and heat dissipation structure for an injection molding machine that adopts the following technical solutions:

[0007] A barrel temperature control and heat dissipation structure for an injection molding machine, comprising a barrel body and a water cooling jacket, wherein the barrel body comprises a coaxially arranged inner sleeve, a middle sleeve, and an outer sleeve, a first filling chamber for filling with an inert gas being reserved between the outer wall of the inner sleeve and the inner wall of the middle sleeve, and a second filling chamber for filling with an inert gas being reserved between the outer wall of the middle sleeve and the inner wall of the outer sleeve;

[0008] The water cooling jacket is coaxially sleeved on the outside of the outer sleeve, and the water cooling jacket is connected to a coolant circulation pump.

[0009] By adopting this technical solution, the inner sleeve is used to pass through the extrusion screw. The inert gas filled between the inner and middle sleeves, as well as between the middle and outer sleeves, provides excellent thermal insulation properties, helping to reduce direct heat transfer to the outside of the barrel. This results in a more stable internal barrel temperature, facilitates precise control of the molding temperature, and improves product quality. The coaxially arranged multi-layer sleeve structure makes the barrel more stable and reliable in high-temperature and high-pressure operating environments. It also reduces thermal stress caused by temperature fluctuations and extends the barrel's service life. Compared to natural cooling methods, the water-cooling jacket and coolant circulation pump can actively and efficiently remove heat from the barrel's outer wall, significantly improving heat dissipation efficiency. The combination of the multi-layer wall structure and water cooling allows for more precise control of barrel temperature, ensuring the stability of the raw material during melting and conveying.

[0010] Furthermore, a plurality of first reinforcement ring plates are provided between the outer wall of the inner sleeve and the inner wall of the middle sleeve at intervals along the length direction, and each of the first reinforcement ring plates is provided with a first air hole.

[0011] By adopting this technical solution, multiple first reinforcement ring plates are spaced lengthwise between the outer wall of the inner sleeve and the inner wall of the middle sleeve. These reinforcement ring plates serve as additional support structures, enhancing the overall structural strength of the barrel, effectively resisting the stress and deformation caused by high-temperature and high-pressure operating conditions, and ensuring the barrel's long-term stability. The first reinforcement ring plates are provided with first air holes, allowing a small amount of inert gas to flow between the two sleeves. This helps evenly distribute heat, reduce local overheating, and prevent excessive heat transfer to the outside. This helps precisely control the internal barrel temperature and balance the requirements of heat conduction and insulation.

[0012] Furthermore, the positions of the first air holes on each of the first reinforcement ring plates are staggered.

[0013] By adopting this technical solution, the staggered arrangement of the first air holes increases the length of the gas flow path, making the flow of inert gas between the inner and middle sleeves more complex and uniform. This flow pattern helps reduce heat accumulation in localized areas, resulting in more uniform heat distribution within the barrel, thereby improving the uniformity of raw material melting and enhancing product quality and consistency. The first reinforcement ring plate provides additional support for the barrel, but the presence of the air holes further complicates the stress distribution between the reinforcement ring plate and the sleeve. The staggered arrangement of the air holes enhances structural support, thereby improving the stability of the entire barrel structure.

[0014] Furthermore, a plurality of second reinforcement ring plates are provided between the outer wall of the middle sleeve and the inner wall of the outer sleeve at intervals along the length direction, and each of the second reinforcement ring plates is provided with a second air hole.

[0015] By adopting this technical solution, the second reinforcing ring plate and its secondary air holes also optimize heat conduction and insulation, promoting even heat distribution, helping to precisely control the temperature inside the barrel and improving the stability of raw material melting and conveying. The combination of the first and second reinforcing ring plates provides a dual-reinforcement structure for the barrel, enhancing its overall rigidity and stability, enabling it to better withstand the stress and deformation in high-temperature and high-pressure operating environments. This multiple reinforcement and optimization improves the reliability of the injection molding machine barrel's temperature control and heat dissipation structure, enabling it to adapt to various operating environments and production requirements, ensuring stable raw material melting and conveying, and improving product quality and production efficiency.

[0016] Furthermore, the second air holes on each of the second reinforcement ring plates are staggered in position.

[0017] By adopting this technical solution, the second reinforcing ring plate and its staggered air holes provide a more stable support structure for the barrel, enhancing its overall rigidity and stability, enabling it to better withstand the stress and deformation in high-temperature and high-pressure operating environments. The staggered arrangement of the second air holes makes the flow path of the inert gas between the middle and outer sleeves more complex and diverse, helping to reduce heat accumulation in localized areas and achieve more uniform heat distribution within the barrel. This improves the uniformity of raw material melting and reduces product quality issues caused by temperature unevenness.

[0018] Furthermore, the positions of the first reinforcement ring plates and the positions of the second reinforcement ring plates are staggered.

[0019] By adopting this technical solution, the staggered arrangement of the first and second reinforcement ring plates creates a more complex and stable support network, effectively dispersing and resisting the stress and deformation generated during barrel operation, thereby enhancing the barrel's overall structural strength. The staggered reinforcement ring plates more effectively disperse thermal stress, reducing its concentration in specific locations. This helps reduce the risk of material fatigue and damage caused by thermal stress, thereby increasing the barrel's service life and reliability.

[0020] Furthermore, the water cooling jacket includes a cloth jacket layer and a cooling pipe arranged inside the cloth jacket layer, the cooling pipe has a liquid inlet end and a liquid discharge end, the liquid inlet end and the liquid discharge end both protrude from the cloth jacket layer and are connected to the coolant circulation pump.

[0021] By adopting this technical solution, the cooling pipes are directly embedded within the cloth jacket, in close contact with the barrel's outer wall, effectively absorbing heat transferred from the barrel. Coolant circulates within the cooling pipes, removing heat through heat exchange, thereby cooling the barrel. The coolant circulation pump is directly connected to the cooling pipes through the liquid inlet and outlet ports, forming a complete coolant circulation system, improving heat exchange efficiency and ensuring that the barrel maintains a stable temperature during operation. Because the cooling pipes are located within the cloth jacket, their layout and direction can be flexibly designed. This helps optimize the cooling pipe layout based on the actual size and shape of the barrel, ensuring even and efficient heat dissipation. At the same time, the cloth jacket also provides a certain degree of protection, preventing the cooling pipes from being disturbed or damaged by the external environment.

[0022] Furthermore, the outer surface of the cloth sleeve layer is coated with a heat-insulating coating.

[0023] By adopting the above technical solution, after applying the thermal insulation coating on the outer surface of the cloth sleeve layer, the influence of external heat sources on the coolant in the cooling pipe can be effectively isolated, and the heat loss from the inside of the barrel to the external environment through the cloth sleeve layer can be reduced, which helps to maintain the low temperature state of the coolant in the cooling pipe, improve the heat exchange efficiency, and reduce energy consumption.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. By filling inert gas between the inner and middle sleeves, as well as between the middle and outer sleeves, a heat insulation layer is formed. The filling of inert gas, the coaxial arrangement of the multiple sleeves, and the air hole design on the reinforcing ring plate jointly promote the uniform distribution of heat, reduce local overheating, and effectively reduce the direct transfer of heat to the outside of the barrel, making the internal temperature of the barrel more stable, facilitating the precise control of the molding temperature, and thus improving product quality.

[0026] 2. The staggered arrangement of the reinforcing ring plates forms a stable support network, effectively dissipating thermal stress, reducing the risk of material fatigue and damage, and extending the service life of the barrel. The multi-layer sleeve structure cooperates with the reinforcing ring plates to enhance the overall structural strength of the barrel, effectively resisting stress and deformation in high-temperature and high-pressure working environments, ensuring the long-term stability of the barrel.

[0027] 3. The water-cooling jacket and coolant circulation pump constitute an active heat dissipation system. Compared with the natural cooling method, it can more efficiently remove the heat from the outer wall of the barrel, significantly improve the heat dissipation efficiency, and help the barrel maintain a stable temperature during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of a barrel temperature control and heat dissipation structure of an injection molding machine according to an embodiment of the present application.

[0029] Figure 2 It is a schematic diagram of the overall structure in which the water-cooling jacket is located outside the barrel body in an embodiment of the present application.

[0030] Figure 3 It is a schematic cross-sectional view of the water-cooling jacket located outside the barrel body in an embodiment of the present application.

[0031] Figure 4 yes Figure 3 An enlarged schematic diagram of the structure of the first reinforcement ring plate, the first air hole, the second reinforcement ring plate and the second air hole in part A.

[0032] Explanation of the accompanying drawings: 1. Barrel body; 11. Inner sleeve; 111. First filling chamber; 112. First reinforcing ring plate; 1121. First air hole; 12. Middle sleeve; 121. Second filling chamber; 122. Second reinforcing ring plate; 1221. Second air hole; 13. Outer sleeve; 2. Water-cooling jacket; 21. Cloth jacket layer; 211. Insulating coating; 22. Cooling pipe; 221. Liquid inlet end; 222. Liquid discharge end; 3. Coolant circulation pump. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of this application more clear, the following Figure 1-4 And embodiments, the present application is further described in detail.

[0034] The embodiment of the present application discloses a barrel temperature control and heat dissipation structure of an injection molding machine. Figure 1 The barrel temperature control and heat dissipation structure of the injection molding machine includes a barrel body 1, a water cooling jacket 2, and a coolant circulation pump 3. The barrel body 1 has a hollow cavity structure for passing the extrusion screw. The inner wall of the water cooling jacket 2 abuts against the outer wall of the barrel body 1 to cool the barrel body 1 with water. The coolant circulation pump 3 is connected to the water cooling jacket 2 to circulate the coolant externally.

[0035] Reference Figure 2 and Figure 3 The barrel body 1 includes an inner sleeve 11, a middle sleeve 12, and an outer sleeve 13, which are coaxially arranged and integrally connected. The inner sleeve 11, the middle sleeve 12, and the outer sleeve 13 together form a multi-layer wall structure. The inner sleeve 11 is used to pass through the extrusion screw and provide a melting chamber for the raw materials. A first filling chamber 111 is formed between the inner wall of the middle sleeve 12 and the outer wall of the inner sleeve 11. A second filling chamber 121 is formed between the outer wall of the middle sleeve 12 and the outer wall of the outer sleeve 13. The interiors of the first filling chamber 111 and the second filling chamber 121 are both filled with inert gas.

[0036] Combine Figure 4First reinforcement ring plates 112 are evenly spaced along the length between the outer wall of the inner sleeve 11 and the inner wall of the middle sleeve 12. Each first reinforcement ring plate 112 has a first air hole 1121 for the passage of inert gas. In this embodiment, the number of first reinforcement ring plates 112 is preferably two, and the first air holes 1121 on the two first reinforcement ring plates 112 are staggered.

[0037] Second reinforcing ring plates 122 are evenly spaced along the length between the outer wall of the middle sleeve 12 and the inner wall of the outer sleeve 13. Each second reinforcing ring plate 122 is provided with a second air hole 1221 for the passage of inert gas. In this embodiment, the number of second reinforcing ring plates 122 is preferably three, and the second air holes 1221 on each second reinforcing ring plate 122 are staggered. The staggered arrangement of the first reinforcing ring plates 112 and the second reinforcing ring plates 122 forms a complex and stable support network, effectively dissipating and resisting stress and deformation generated during barrel operation, thereby enhancing the overall structural strength of the barrel.

[0038] Reference Figure 3 and Figure 4 The water-cooling jacket 2 includes a cloth jacket layer 21 and a cooling tube 22. In this embodiment, the outer surface of the cloth jacket layer 21 is coated with a thermal insulation coating 211. The cooling tube 22 is spirally wound inside the cloth jacket layer 21. The cloth jacket layer 21 abuts against the outer wall of the outer sleeve 13 for cooling.

[0039] Combine Figure 1 The cooling pipe 22 has a liquid inlet end 221 and a liquid discharge end 222 . Both the liquid inlet end 221 and the liquid discharge end 222 protrude from the cloth cover layer 21 and are connected to the cooling liquid circulation.

[0040] The implementation principle of the barrel temperature control and heat dissipation structure of an injection molding machine in an embodiment of the present application is as follows: the barrel body 1 adopts an inner sleeve 11, a middle sleeve 12 and an outer sleeve 13 that are coaxially arranged and integrally connected to form a multi-layer wall structure. The inner sleeve 11 is used to pass the extrusion screw and provide a raw material melting chamber. A first filling chamber 111 is formed between the inner sleeve 11 and the middle sleeve 12, and a second filling chamber 121 is formed between the middle sleeve 12 and the outer sleeve 13. The first filling chamber 111 and the second filling chamber 121 are both filled with inert gas. These inert gases have good thermal insulation properties and can effectively reduce the direct transfer of heat from the inside of the barrel to the outside, thereby maintaining the stability of the temperature inside the barrel.

[0041] Between the inner sleeve 11 and the middle sleeve 12, first reinforcing ring plates 112 are evenly spaced along the length direction, and first air holes 1121 are provided on them. These reinforcing ring plates not only enhance the structural strength of the barrel, but also allow a small amount of inert gas to flow through the air holes, which helps to evenly distribute heat and reduce local overheating. A second reinforcing ring plate 122 and a second air hole 1221 are also provided between the middle sleeve 12 and the outer sleeve 13, and the positions of the first reinforcing ring plates 112 and the second reinforcing ring plates 122 are staggered to form a complex and stable support network. This design effectively disperses and resists the stress and deformation generated by the barrel during operation, while optimizing the heat conduction path and making the heat distribution more uniform.

[0042] The water-cooling jacket 2 includes a cloth layer 21 and a spirally wound cooling tube 22. The cloth layer 21 abuts against the outer wall of the outer sleeve 13 and actively dissipates heat through the cooling tube 22 inside it. The cooling tube 22 has a liquid inlet end 221 and a liquid outlet end 222, which are connected to the coolant circulation pump 3 to form a complete coolant circulation system. The coolant circulates in the cooling tube 22, removing heat from the outer wall of the barrel through heat exchange, thereby cooling the barrel. The thermal insulation coating 211 on the outside of the cloth layer 21 further isolates the coolant from the influence of external heat sources, thereby improving heat dissipation efficiency.

[0043] Through the combined effects of the multi-layer wall insulation structure, reinforced ring plate support, optimized heat conduction, and active heat dissipation by the water-cooling jacket 2, the injection molding machine barrel temperature control and heat dissipation structure of this application can precisely control the internal barrel temperature, ensuring the stability of the raw materials during melting and conveying. At the same time, this structure enhances the overall structural strength of the barrel, improving its stability and reliability in high-temperature and high-pressure operating environments, and extending the barrel's service life.

[0044] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A barrel temperature control and heat dissipation structure for an injection molding machine, characterized in that: The invention comprises a barrel body (1) and a water-cooling jacket (2), wherein the barrel body (1) comprises an inner sleeve (11), a middle sleeve (12) and an outer sleeve (13) which are coaxially arranged, a first filling chamber (111) for filling inert gas is reserved between the outer wall of the inner sleeve (11) and the inner wall of the middle sleeve (12), and a second filling chamber (121) for filling inert gas is reserved between the outer wall of the middle sleeve (12) and the inner wall of the outer sleeve (13); The water cooling jacket (2) is coaxially sleeved on the outside of the outer sleeve (13), and the water cooling jacket (2) is connected to a coolant circulation pump (3).

2. The barrel temperature control and heat dissipation structure of an injection molding machine according to claim 1, characterized in that: A plurality of first reinforcement ring plates (112) are provided between the outer wall of the inner sleeve (11) and the inner wall of the middle sleeve (12) at intervals along the length direction, and each of the first reinforcement ring plates (112) is provided with a first air hole (1121).

3. The barrel temperature control and heat dissipation structure of an injection molding machine according to claim 2, characterized in that: The first air holes (1121) on each of the first reinforcing ring plates (112) are arranged in staggered positions.

4. The barrel temperature control and heat dissipation structure of an injection molding machine according to claim 3, characterized in that: A plurality of second reinforcement ring plates (122) are provided between the outer wall of the middle sleeve (12) and the inner wall of the outer sleeve (13) at intervals along the length direction, and each second reinforcement ring plate (122) is provided with a second air hole (1221).

5. The barrel temperature control and heat dissipation structure of an injection molding machine according to claim 4, characterized in that: The second air holes (1221) on each of the second reinforcing ring plates (122) are arranged in staggered positions.

6. The barrel temperature control and heat dissipation structure of an injection molding machine according to claim 4, characterized in that: The positions of the first reinforcement ring plates (112) and the positions of the second reinforcement ring plates (122) are staggered.

7. The barrel temperature control and heat dissipation structure of an injection molding machine according to claim 1, characterized in that: The water cooling jacket comprises a cloth jacket layer (21) and a cooling pipe (22) arranged inside the cloth jacket layer (21); the cooling pipe (22) has a liquid inlet end (221) and a liquid discharge end (222); the liquid inlet end (221) and the liquid discharge end both protrude from the cloth jacket layer (21) and are both connected to the coolant circulation pump (3).

8. The barrel temperature control and heat dissipation structure of an injection molding machine according to claim 7, characterized in that: The outer surface of the cloth sleeve layer (21) is coated with a heat-insulating coating (211).

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