Nitrogen spring mounting protection structure

Abstract

The present application relates to a kind of nitrogen spring installation protection structures, including fixed block in fixed mould, nitrogen spring is located in the fixed block, first cooling water path is equipped in the fixed block, the first cooling water path cools the fixed block and nitrogen spring, the cylinder of the nitrogen spring is located in fixed block, the first cooling water path is arranged around three sides of nitrogen spring;Fixed screw is arranged in the fixed block, the bottom of the fixed screw is fixed with fixed mould, the top of the fixed block is equipped with protection plate, protection plate is located above fixed screw, and the protection plate covers and protects fixed screw.The fixed block in the present application protects nitrogen spring and makes nitrogen spring as far as possible to reduce direct contact with the environment in mould, slow down the direct influence of mould temperature rise on nitrogen spring;First cooling water path cools the fixed block and nitrogen spring, avoids nitrogen spring to work damage, failure in high temperature environment.

Description

Technical Field

[0001] This invention relates to a nitrogen spring mounting and protection structure, belonging to the field of injection mold technology. Background Technology

[0002] A nitrogen spring is a mechanical device that uses nitrogen compression to provide elastic force. It is widely used in applications requiring force, such as industrial machinery, automation equipment, automobiles, and aerospace. Its working principle is based on the compressibility of gases. Specifically, nitrogen is filled into a closed metal cylinder and sealed to create a certain internal pressure. When external pressure or tension is applied, the nitrogen is compressed within the sealed cavity, and the spring provides restoring force. Conversely, when the external force is removed, the nitrogen expands, and the spring returns to its original position through the internal pressure.

[0003] Nitrogen springs have high requirements for the temperature of the working environment. Currently, nitrogen springs are widely used in molds, for example, in the fixed mold of injection molds to eject molded parts. However, the mold generates a large amount of heat during operation, causing the internal temperature to rise rapidly. This causes the nitrogen gas inside the spring to expand, increasing the internal pressure and potentially degrading the spring's mechanical properties, affecting its normal function and stability. Furthermore, the sealing rings of nitrogen springs are usually made of plastic, which easily loses elasticity and sealing performance at high temperatures. The sealing rings may also age or deform, leading to seal failure and nitrogen leakage. This can cause the nitrogen spring to malfunction or fail under high-temperature conditions, affecting the efficiency and safety of the entire equipment or system. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a nitrogen spring mounting and protection structure that can provide cooling protection for nitrogen springs.

[0005] To achieve the objective, the technical solution adopted by this invention is: A nitrogen spring mounting and protection structure includes a fixed block located within a fixed mold, a nitrogen spring disposed within the fixed block, and a first cooling water channel provided within the fixed block for cooling the fixed block and the nitrogen spring.

[0006] As a further optimization of the above technical solution: the first cooling water circuit is provided in two sets, the two sets of the first cooling water circuit are parallel to each other and are both in an n-shape, and the two sets of the first cooling water circuit are connected in series through connecting water circuits.

[0007] As a further optimization of the above technical solution: the fixed mold includes a fixed mold base plate and a hot runner plate located below the fixed mold base plate. The hot runner plate is provided with a second cooling water channel. The upper and lower ends of the fixed block are located in the fixed mold base plate and the hot runner plate, respectively. The first cooling water channel is connected to the second cooling water channel.

[0008] As a further optimization of the above technical solution: both bottom ends of the first cooling water circuit are opened on the bottom surface of the fixed block. In one set of the first cooling water circuit, one bottom end serves as the water inlet and the other bottom end is blocked by a sealing plug. In the other set of the first cooling water circuit, one bottom end serves as the water outlet and the other bottom end is blocked by a sealing plug. The water inlet and the water outlet are located on the same side. The water inlet and the water outlet are both connected to the second cooling water circuit.

[0009] As a further optimization of the above technical solution: a fixing screw is inserted inside the fixing block, the bottom of the fixing screw is fixed to the fixed mold, and a protective plate is provided on the top of the fixing block. The protective plate is located above the fixing screw and covers and protects the fixing screw.

[0010] As a further optimization of the above technical solution: the fixing block has a connecting fixing large hole and a fixing small hole, and a positioning step is formed between the fixing large hole and the fixing small hole. The shank of the fixing screw passes through the fixing small hole and is fixed to the fixed mold. The head of the fixing screw is located entirely inside the fixing large hole. The bottom of the fixing screw head is in close contact with the positioning step. The protective plate covers the fixing large hole.

[0011] As a further optimization of the above technical solution: the length of the protective plate is greater than the length of the fixing block, so that the protective plate covers the entire top surface of the fixing block. The fixed mold has a first mounting groove and a second mounting groove located below the first mounting groove. The protective plate is located in the first mounting groove, and the fixing block is located in the second mounting groove. The top surface of the protective plate and the top surface of the fixed mold are on the same horizontal plane. The protective plate is fixed to the fixed mold by screws.

[0012] As a further optimization of the above technical solution: the protective plate and the fixing block are both made of 45# steel.

[0013] Compared with existing technologies, the present invention protects the nitrogen spring by fixing the fixed block and minimizes its direct contact with the mold environment, thus mitigating the direct impact of mold temperature rise on the nitrogen spring. The first cooling water channel cools both the fixed block and the nitrogen spring, preventing damage or failure of the nitrogen spring under high-temperature conditions and protecting it. The interconnected first and second cooling water channels form a complete and widely distributed cooling system, allowing the system to be simultaneously distributed within the hot runner plate and the fixed block, achieving simultaneous cooling of the hot runner and the nitrogen spring. Furthermore, the overall cooling of the hot runner plate can further reduce the temperature of the fixed block, preventing excessively high temperatures within the mold and improving temperature control. The protective plate prevents the fixing screws from breaking and flying out of the fixed block, thus avoiding serious safety accidents. The protective plate also protects the fixing screws from rusting, deformation, or loosening caused by external environmental factors, extending their lifespan and ensuring the fixing strength of the fixed block. Attached Figure Description

[0014] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0015] Figure 2 This is a schematic diagram of the stepped cross-sectional structure of the present invention.

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of the fixed block. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. For example... Figure 1-3 As shown, a nitrogen spring mounting and protection structure includes a fixing block 2 located within a fixed mold 1, and a nitrogen spring 3 disposed within the fixing block 2. The cylinder of the nitrogen spring 3 is completely contained within the fixing block 2, allowing the fixing block 2 to enclose the nitrogen spring 3 as much as possible. The fixing block 2 protects the nitrogen spring 3 and minimizes its direct contact with the mold's internal environment, mitigating the direct impact of mold temperature rise on the nitrogen spring 3. A first cooling water channel 21 is provided within the fixing block 2, which cools both the fixing block 2 and the nitrogen spring 3, preventing damage or failure of the nitrogen spring 3 under high-temperature conditions and thus protecting the nitrogen spring.

[0018] In the above technical solution: the first cooling water channel 21 is provided in two sets, the two sets of first cooling water channels 21 are parallel to each other and are both in an n-shape, and the two sets of first cooling water channels 21 are connected in series by connecting water channels 24, such as Figure 3 As shown.

[0019] In the above technical solution: the fixed mold 1 includes a fixed mold base plate 11 and a hot runner plate 12 located below the fixed mold base plate 11. The hot runner plate 12 has a second cooling water channel 13. The upper and lower ends of the fixed block 2 are located within the fixed mold base plate 11 and the hot runner plate 12, respectively. The first cooling water channel 21 is connected to the second cooling water channel 13. The hot runner in the hot runner plate 12 requires high-temperature operation, but excessively high temperatures can cause premature solidification of the plastic melt or generate thermal stress, thus affecting product quality. Furthermore, prolonged high-temperature operation can accelerate the wear and aging of the hot runner components. Therefore, the hot runner plate 12 needs a cooling system for cooling. The connected first cooling water channel 21 and second cooling water channel 13 form a complete and widely distributed cooling system, allowing a single cooling system to be simultaneously distributed within the hot runner plate 12 and the fixed block 2, simultaneously cooling the hot runner and the nitrogen spring 3. In addition, the overall cooling of the hot runner plate 12 can further reduce the temperature of the fixed block 2, preventing excessively high temperatures within the fixed mold 1 and improving temperature control.

[0020] In the above technical solution: both bottom ends of the first cooling water passage 21 are located on the bottom surface of the fixing block 2. One bottom end of one set of the first cooling water passage 21 serves as the inlet 25, and the other bottom end is blocked by a sealing cap. Another set of the first cooling water passage 21 has one bottom end serving as the outlet 26, and the other bottom end is blocked by a sealing cap. The inlet 25 and outlet 26 are located on the same side. Figure 3 As shown, Figure 3 Arrows indicate the flow direction of cooling water through the first cooling water passage 21. Both the inlet 25 and outlet 26 are connected to the second cooling water passage 13. One end of the connecting water passage 24 is located on the side of the fixing block 2, and the end of the connecting water passage 24 is also sealed with a cap. In addition to the inlet 25 and outlet 26, the first cooling water passage 21 has multiple water passage ends that connect to the outside, making the connections between cooling water passages more flexible and adaptable.

[0021] In the above technical solution: a fixing screw 4 is inserted inside the fixing block 2, and the bottom of the fixing screw 4 is fixed to the fixed mold 1, thereby fixing the fixing block 2 to the fixed mold 1. A protective plate 5 is provided on the top of the fixing block 2, located above the fixing screw 4, and the protective plate 5 covers and protects the fixing screw 4. When the mold is closed, the nitrogen spring 3 is always in a compressed state, and the fixing block 2 is subjected to extremely large forces, which may cause the fixing screw 4 to break. The protective plate 5 can prevent the fixing screw 4 from breaking and flying out of the fixing block 2, injuring people or objects and causing a major safety accident. At the same time, the protective plate 5 also protects the fixing screw 4, preventing the fixing screw 4 from rusting, deforming, or loosening due to the external environment, extending the life of the fixing screw 4, and ensuring the fixing strength of the fixing block 2.

[0022] In the above technical solution: the fixing block 2 has a connecting fixing large hole 22 and fixing small hole 23, forming a positioning step between the fixing large hole 22 and fixing small hole 23. The shank of the fixing screw 4 passes through the fixing small hole 23 and is fixed to the fixed mold 1. The head of the fixing screw 4 is entirely located inside the fixing large hole 22, and the bottom of the head of the fixing screw 4 is in close contact with the positioning step. The protective plate 5 covers the fixing large hole 22.

[0023] In the above technical solution: the length of the protective plate 5 is greater than the length of the fixing block 2, so that the protective plate 5 covers the entire top surface of the fixing block 2. The fixed mold 1 has a first mounting groove 14 and a second mounting groove 15 located below the first mounting groove 14. The protective plate 5 is located in the first mounting groove 14, and the fixing block is located in the second mounting groove 15. The top surface of the protective plate 5 and the top surface of the fixed mold 1 are on the same horizontal plane. The protective plate 5 is fixed to the fixed mold 1 by screws.

[0024] In the above technical solution: the protective plate 5 and the fixing block 2 are both made of 45# steel.

[0025] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should fall within the protection scope of the present invention.

Claims

1. A nitrogen spring mounting and protection structure, characterized in that... Includes a fixed block (2) located in a fixed mold (1), a nitrogen spring (3) disposed in the fixed block (2), and a first cooling water channel (21) provided in the fixed block (2), the first cooling water channel (21) cooling the fixed block (2) and the nitrogen spring (3); The fixing block (2) is provided with a fixing screw (4), the bottom of the fixing screw (4) is fixed to the fixed mold (1), and the top of the fixing block (2) is provided with a protective plate (5), which is located above the fixing screw (4) and covers and protects the fixing screw (4).

2. The nitrogen spring mounting and protection structure according to claim 1, characterized in that... The first cooling water path (21) is provided in two sets. The two sets of the first cooling water path (21) are parallel to each other and are both n-shaped. The two sets of the first cooling water path (21) are connected in series through the connecting water path (24).

3. The nitrogen spring mounting and protection structure according to claim 2, characterized in that... The fixed mold (1) includes a fixed mold base plate (11) and a hot runner plate (12) located below the fixed mold base plate (11). The hot runner plate (12) is provided with a second cooling water channel (13). The upper and lower ends of the fixed block (2) are located in the fixed mold base plate (11) and the hot runner plate (12) respectively. The first cooling water channel (21) is connected to the second cooling water channel (13).

4. The nitrogen spring mounting and protection structure according to claim 3, characterized in that... Both ends of the first cooling water passage (21) are located on the bottom surface of the fixed block (2). One end of one set of the first cooling water passage (21) serves as the inlet (25), and the other end is blocked by a sealing plug. One end of the other set of the first cooling water passage (21) serves as the outlet (26), and the other end is blocked by a sealing plug. The inlet (25) and the outlet (26) are located on the same side. The inlet (25) and the outlet (26) are both connected to the second cooling water passage (13).

5. A nitrogen spring mounting and protection structure according to claim 1, characterized in that... The fixing block (2) has a large fixing hole (22) and a small fixing hole (23) that are connected. A positioning step is formed between the large fixing hole (22) and the small fixing hole (23). The rod of the fixing screw (4) passes through the small fixing hole (23) and is fixed to the fixed mold (1). The head of the fixing screw (4) is located inside the large fixing hole (22). The bottom of the head of the fixing screw (4) is in close contact with the positioning step. The protective plate (5) covers the large fixing hole (22).

6. The nitrogen spring mounting and protection structure according to claim 1, characterized in that... The length of the protective plate (5) is greater than the length of the fixing block (2), so that the protective plate (5) covers the entire top surface of the fixing block (2). The fixed mold (1) has a first mounting groove (14) and a second mounting groove (15) located below the first mounting groove (14). The protective plate (5) is located in the first mounting groove (14), and the fixing block (2) is located in the second mounting groove (15). The top surface of the protective plate (5) and the top surface of the fixed mold (1) are on the same horizontal plane. The protective plate (5) is fixed to the fixed mold (1) by screws.

7. The nitrogen spring mounting and protection structure according to claim 1, characterized in that... The protective plate (5) and the fixing block (2) are both made of 45# steel.

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