A VGR automobile steering gear mold structure

Abstract

This invention discloses a VGR automotive steering gear mold structure, including a moving mold structure. The moving mold structure includes a moving template, and the moving template has a cavity with a first moving mold insert, a second moving mold insert, and a third moving mold insert. The fixed mold structure includes a fixed template, and the fixed template has a cavity with a first fixed mold insert and a second fixed mold insert that match the moving mold insert. The moving mold insert and the fixed mold insert together form the injection cavity of the gear product. The fixed template has a feed inlet in the middle. An adjustable water cooling structure is installed inside the moving and fixed templates and connected to an external water cooling system, which cools the templates through a flowing low-temperature water stream. A negative pressure exhaust structure is installed at the feed inlet of the fixed template for more efficient exhaust of gas from the cavity. This invention uses a highly efficient water cooling method, a unique cooling channel design, and a powerful coolant circulation system, which can quickly remove heat from the mold and greatly shorten the mold cooling time.

Description

Technical Field

[0001] This invention relates to the field of gear mold technology, and in particular to a VGR automotive steering gear mold structure. Background Technology

[0002] In the production process of VGR automotive steering gears, the water cooling and venting methods of the molds play a crucial role in product quality and production efficiency. However, current VGR automotive steering gear molds have many shortcomings in terms of water cooling and venting. Regarding water cooling, existing mold cooling systems often suffer from uneven cooling, causing inconsistent shrinkage of different parts of the VGR automotive steering gear during molding. For example, if the gear teeth cool too quickly while the hub cools too slowly, the overall gear dimensions become unstable, precision decreases, and it fails to meet stringent assembly and meshing performance requirements, sometimes even becoming a scrap product. Furthermore, different injection molding materials have different cooling requirements, and existing mold cooling systems cannot adjust the cooling system's pipe distribution according to these different requirements, resulting in low mold adaptability. Regarding venting, the existing molds suffer from significant venting problems. When gas within the mold cavity cannot be expelled in time, defects such as porosity and air marks will form in VGR automotive steering gear products. These defects not only affect the product's appearance quality but also reduce its mechanical properties, making the gears prone to breakage at the defect points under load, thus impacting the reliability and safety of the automotive steering system. Furthermore, poor venting can lead to uneven pressure distribution within the cavity, hindering the normal filling of the plastic melt and causing problems such as incomplete filling and material shortages. This severely affects the dimensional accuracy and shape integrity of the product, increases the scrap rate, reduces production efficiency, and raises production costs.

[0003] Therefore, how to provide a VGR automotive steering gear mold structure is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] One objective of this invention is to propose a VGR automotive steering gear mold structure that can solve the problems of uneven cooling and poor venting in existing molds, thereby improving gear product quality and production efficiency.

[0005] A VGR automotive steering gear mold structure according to an embodiment of the present invention includes A moving mold structure, the moving mold structure including a moving template, wherein a first moving mold insert, a second moving mold insert, and a third moving mold insert are provided in the mold cavity of the moving template; A fixed mold structure includes a fixed mold plate, and a first fixed mold insert and a second fixed mold insert that match the moving mold insert are provided in the mold cavity of the fixed mold plate. The moving mold insert and the fixed mold insert together form the injection cavity of the gear product; a feed port is provided in the middle of the fixed mold plate. An adjustable water-cooling structure is installed inside the moving template and the fixed template, and is connected to an external water-cooling system to cool the template through a flowing low-temperature water stream. A negative pressure exhaust structure is installed at the feed inlet of the fixed template to more efficiently exhaust the gas in the cavity; An auxiliary venting structure is provided inside the first moving mold insert and the first fixed mold insert to assist in venting gas from the corners of the cavity, thereby preventing air holes from forming in the product. A demolding structure is provided to drive the moving mold structure to move, thereby realizing the mold closing and demolding actions.

[0006] Preferably, the adjustable water-cooling structure includes a main water-cooling pipe, a bypass water channel, and an adjustment component. Two main water-cooling pipes are symmetrically arranged in the middle of both the moving and fixed templates. One end of each main water-cooling pipe is connected to the outlet pipe of the water-cooling system, and the other end is connected to the inlet pipe of the water-cooling system. At least one bypass water channel is provided on the outside of each main water-cooling pipe. The bypass water channel is connected to the main water-cooling pipe through multiple connecting water channels. One end of the bypass water channel is sealed, and the other end is connected to the inlet pipe of the water-cooling system through a water pipe. An adjustment component is provided between the main water-cooled pipeline and its corresponding bypass water channel to control the opening and closing of the connecting water channel and the end of the main water-cooled pipeline.

[0007] By setting up water-cooled main pipes, bypass water channels, and adjustment components, the gear mold can adjust the cooling area and cooling effect according to the cooling requirements of different gear materials, thereby increasing the mold's adaptability.

[0008] Preferably, the adjustment assembly includes a drive rod, a drive disc, a connecting channel, and a drive protrusion. The drive rod is inserted into a moving or fixed template between the bypass channel and the main water-cooled pipe. One end of the drive rod is connected to the drive disc, and the other end is connected to the drive protrusion. The drive rod has connecting channels that are the same number as the connecting channels. When the drive rod is rotated so that the connecting channels are parallel to the connecting channels, the connecting channels open, allowing water from the main water-cooled pipe to enter the bypass channel. When the connecting channels are perpendicular to the connecting channels, the connecting channels are blocked. A sealing component is provided on the end side of the water-cooled main pipe near the drive rod. The drive protrusion can drive the movement of the sealing component to seal the end of the water-cooled main pipe.

[0009] Preferably, the sealing assembly includes a sealing disc, a spring, and a sealing rod. The sealing disc slides on one side of the water-cooled main pipe, and the diameter of the sealing disc is not less than the inner diameter of the water-cooled main pipe. One side of the sealing disc is connected to the sealing rod, which is T-shaped. A spring is sleeved on the outer side of the sealing rod. When the drive rod rotates, it drives the drive protrusion to squeeze the sealing rod, thereby causing the sealing rod to move the sealing disc into the water-cooled main pipe to seal it. At this time, the spring is compressed. When the drive protrusion continues to rotate and releases the compression, the spring returns to its original shape and drives the sealing disc to move, releasing the seal.

[0010] Preferably, the negative pressure exhaust structure includes a plurality of negative pressure exhaust grooves evenly distributed around the outer ring of the feed inlet and a negative pressure exhaust fan disposed within the negative pressure exhaust grooves. The negative pressure exhaust grooves are connected in communication with the mold cavity. The negative pressure exhaust fan is rotatably disposed on both sides of the negative pressure exhaust grooves, with one side of the fan blade extending into the inner cavity of the feed inlet and the other side of the fan blade extending into the negative pressure exhaust groove. When feeding, the flowing material will drive the negative pressure exhaust fan to rotate, and the other side of the fan blade will exhaust the air in the negative pressure exhaust groove to the outside, creating a negative pressure inside, which is conducive to the discharge of gas from the mold cavity.

[0011] Preferably, a mold fixing plate is provided on the outer side of the mold plate, and a feeding hopper is provided in the middle of the mold fixing plate. The inner end of the feeding hopper is connected to the feeding port. There is an exhaust gap between the outer wall of the feeding hopper and the mold fixing plate and the mold plate. The outlet end of the negative pressure exhaust groove is connected to the exhaust gap. When exhausting, the gas in the cavity is discharged out of the mold through the negative pressure exhaust groove and the exhaust gap.

[0012] Preferably, the auxiliary venting structure includes an annular groove disposed inside the first moving mold insert and the first fixed mold insert. The first moving mold insert and the first fixed mold insert each consist of four pieces, which are spliced ​​together to form an annular gear shape. Each groove in the first moving mold insert and the first fixed mold insert has an vent hole on its inner wall, and each vent hole communicates with the corresponding annular groove. Both the first moving mold insert and the first fixed mold insert have connecting holes, which are connected to each other, allowing the annular grooves inside the first moving mold insert and the first fixed mold insert to communicate. The side wall of the first moving mold insert also has an auxiliary venting channel, one end of which communicates with the annular groove, and the other end communicates with the outside of the mold.

[0013] During use, the gas in the corners of the cavity is discharged into the annular groove through the exhaust hole, and then discharged through the auxiliary exhaust channel, thereby more thoroughly expelling the gas in the corners of the cavity that is difficult to discharge, ensuring the quality of the gear products.

[0014] Preferably, a powder-bonded alloy block is embedded at the inner end of the vent. The powder-bonded alloy block has a porous structure with a porosity between 30% and 50%, allowing gas to escape quickly through the pores while blocking the molten plastic. The use of the powder-bonded alloy block not only improves the venting effect but also enables it to withstand the high pressure and high temperature during the injection molding process, ensuring the normal operation of the mold.

[0015] Preferably, the demolding structure includes a mounting plate, a base plate, a moving mold fixing plate, a telescopic cylinder, and an ejector pin. The moving mold fixing plate is connected to the moving mold plate and the base plate. Telescopic cylinders are installed at the four corners of the mounting plate. The movable end of the telescopic cylinder is connected to the moving mold fixing plate. The telescopic cylinder moves the moving mold fixing plate and the moving mold plate by extending and retracting. One end of the ejector pin is fixed on the mounting plate, and the other end passes through the moving mold fixing plate and the moving mold plate. During the mold closing stage, the inner end of the ejector pin is flush with the inner wall of the cavity. When demolding, the extension and retraction of the telescopic cylinder moves the moving platen away from the fixed platen, and the inner end of the ejector pin pushes the gear product out of the cavity, completing the demolding process.

[0016] Preferably, the second moving mold insert is provided with a plurality of protrusions and ejector pin holes, wherein the protrusions can be through holes on the molded gear product; and the ejector pin holes are for the inner end of the ejector pin to pass through.

[0017] The beneficial effects of this invention are: This invention employs a highly efficient water cooling method, a unique cooling channel design, and a powerful coolant circulation system, which can quickly remove heat from the mold and greatly shorten the mold's cooling time.

[0018] This invention, through the arrangement of a water-cooled main pipe, a bypass water channel, and an adjustment component, allows the gear mold to adjust the cooling area and cooling effect according to the cooling requirements of different gear materials, thereby increasing the mold's adaptability.

[0019] This invention incorporates a negative pressure exhaust structure. When the material is fed, the flowing material drives the negative pressure exhaust fan to rotate, causing the fan blades to expel the air from the negative pressure exhaust groove, creating a negative pressure inside. This facilitates the discharge of gas from the cavity and prevents residual gas from forming pores on the surface of the gear product.

[0020] This invention, by setting an auxiliary exhaust structure, can discharge gas from the corners of the cavity into the annular groove through the exhaust hole, and then discharge it through the auxiliary exhaust channel, thereby more thoroughly expelling the corner gas that is difficult to discharge from the cavity and ensuring the quality of gear products. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of a VGR automotive steering gear mold structure proposed in this invention; Figure 2 This is a front view of a VGR automotive steering gear mold structure proposed in this invention.

[0022] Figure 3 This is a schematic diagram of the moving template in a VGR automotive steering gear mold structure proposed in this invention.

[0023] Figure 4 This is an internal view of the moving template in a VGR automotive steering gear mold structure proposed in this invention.

[0024] Figure 5 This is a diagram showing the distribution of water-cooling channels within the fixed template in a VGR automotive steering gear mold structure proposed in this invention.

[0025] Figure 6 This is an overall view of the first moving mold insert in a VGR automotive steering gear mold structure proposed in this invention.

[0026] Figure 7 This is a schematic diagram of the second moving mold insert in a VGR automotive steering gear mold structure proposed in this invention.

[0027] Figure 8 This is a single image of the first moving mold insert in a VGR automotive steering gear mold structure proposed in this invention.

[0028] Figure 9 This is a schematic diagram of the fixed template in a VGR automotive steering gear mold structure proposed in this invention.

[0029] Figure 10 This is an internal view of the fixed template in a VGR automotive steering gear mold structure proposed in this invention.

[0030] Figure 11 This is a top view of the fixed template in a VGR automotive steering gear mold structure proposed in this invention.

[0031] Figure 12 This is a schematic diagram of the adjusting component in a VGR automotive steering gear mold structure proposed in this invention.

[0032] Figure 13 This is a cross-sectional view of the fixed template and fixed template fixing plate in a VGR automotive steering gear mold structure proposed in this invention.

[0033] Figure 14 This is a front view of the fixed template and fixed template fixing plate in a VGR automotive steering gear mold structure proposed in this invention.

[0034] Figure 15 This is a schematic diagram of the feed hopper in a VGR automotive steering gear mold structure proposed in this invention.

[0035] Figure 16 This is a schematic diagram of the gear product in a VGR automotive steering gear mold structure proposed in this invention.

[0036] In the diagram: 1. Mounting plate; 2. Base plate; 3. Moving mold fixing plate; 4. Moving mold plate; 5. Fixed mold plate; 6. Fixed mold fixing plate; 7. Feed hopper; 8. Telescopic cylinder; 9. Water-cooled main pipe; 10. Adjustment component; 11. First moving mold insert; 12. Second moving mold insert; 13. Third moving mold insert; 14. Ejector pin; 15. Exhaust port; 16. Feed port; 17. Negative pressure exhaust groove; 18. Negative pressure exhaust fan; 19. Exhaust gap; 20. Sealing component; 21. First fixed mold insert; 22. Second fixed mold insert; 23. Gear product; 901. Connecting waterway; 902. Bypass waterway; 1001. Drive rod; 1002. Drive disc; 1003. Connecting channel; 1004. Drive protrusion; 1101. Annular groove; 1102. Vent hole; 1103. Connecting hole; 1104. Auxiliary venting channel; 1201. Protrusion; 1202. Pin hole; 2001. Sealing disc; 2002. Spring; 2003. Sealing rod. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0038] refer to Figure 1-16 A VGR automotive steering gear mold structure, including The moving mold structure includes a moving mold plate 4, and the mold cavity of the moving mold plate 4 is provided with a first moving mold insert 11, a second moving mold insert 12, and a third moving mold insert 13; The fixed mold structure includes a fixed mold plate 5. The mold cavity of the fixed mold plate 5 is provided with a first fixed mold insert 21 and a second fixed mold insert 22 that match the moving mold insert. The moving mold insert and the fixed mold insert together form the injection cavity of the gear product 23. The fixed mold plate 5 is provided with a feed port 16 in the middle. An adjustable water-cooling structure is installed inside the moving template 4 and the fixed template 5, and is connected to an external water-cooling system. The template is cooled by flowing low-temperature water. The negative pressure exhaust structure is set at the feed inlet 16 of the fixed template 5 to more efficiently exhaust the gas in the cavity. An auxiliary venting structure is provided in the first moving mold insert 11 and the first fixed mold insert 21 to help vent the gas in the corners of the cavity, thereby preventing the product from having air holes. The demolding structure is used to drive the moving mold structure to achieve the mold closing and demolding actions.

[0039] In this implementation plan, reference is made to Figure 5 The adjustable water-cooling structure includes a main water-cooling pipe 9, a bypass water channel 902, and an adjustment component 10. Two main water-cooling pipes 9 are symmetrically arranged in the middle of both the moving template 4 and the fixed template 5. One end of the main water-cooling pipe 9 is connected to the outlet pipe of the water-cooling system, and the other end is connected to the inlet pipe of the water-cooling system. At least one bypass water channel 902 is provided on the outside of each main water-cooling pipe 9. The bypass water channel 902 is connected to the main water-cooling pipe 9 through multiple connecting water channels 901. One end of the bypass water channel 902 is sealed, and the other end is connected to the inlet pipe of the water-cooling system through a water pipe. An adjustment component 10 is provided between the water-cooled main pipe 9 and its corresponding bypass water channel 902, which is used to control the opening and closing of the connecting water channel 901 and the opening and closing of the end of the water-cooled main pipe 9.

[0040] By setting up the main water cooling pipe 9, the bypass water channel 902 and the adjustment component 10, the gear mold can adjust the cooling area and cooling effect according to the cooling requirements of different gear materials, thereby increasing the adaptability of the mold.

[0041] In this implementation plan, reference is made to Figure 12 The adjustment assembly 10 includes a drive rod 1001, a drive disc 1002, a connecting channel 1003, and a drive protrusion 1004. The drive rod 1001 is inserted into the moving template 4 or the fixed template 5 between the bypass water channel 902 and the water-cooled main pipe 9. One end of the drive rod 1001 is connected to the drive disc 1002, and the other end is connected to the drive protrusion 1004. The drive rod 1001 is provided with a number of connecting channels 1003 that are the same as the number of connecting water channels 901. When the drive rod 1001 is rotated so that the connecting channel 1003 is parallel to the connecting water channel 901, the connecting water channel 901 is opened, and the water flow from the water-cooled main pipe 9 can enter the bypass water channel 902. When the connecting channel 1003 is perpendicular to the connecting water channel 901, the connecting water channel 901 is blocked. A sealing component is provided on the end side of the water-cooled main pipe 9 near the drive rod 1001. The drive protrusion 1004 can drive the movement of the sealing component to seal the end of the water-cooled main pipe 9.

[0042] In this embodiment, the sealing assembly includes a sealing disc 2001, a spring 2002, and a sealing rod 2003. The sealing disc 2001 slides on one side of the water-cooled main pipe 9, and the diameter of the sealing disc 2001 is not less than the inner diameter of the water-cooled main pipe 9. One side of the sealing disc 2001 is connected to the sealing rod 2003, which is T-shaped. The spring 2002 is sleeved on the outer side of the sealing rod 2003. When the drive rod 1001 rotates, it drives the drive protrusion 1004 to squeeze the sealing rod 2003, thereby causing the sealing rod 2003 to move the sealing disc 2001 into the water-cooled main pipe 9 to seal it. At this time, the spring 2002 is compressed. When the drive protrusion 1004 continues to rotate and releases the compression, the spring 2002 returns to its original shape and drives the sealing disc 2001 to move, thus releasing the seal.

[0043] In this implementation plan, reference is made to Figure 13-15 The negative pressure exhaust structure includes multiple negative pressure exhaust grooves 17 evenly distributed around the outer ring of the feed inlet 16 and negative pressure exhaust fans 18 disposed within the negative pressure exhaust grooves 17. The negative pressure exhaust grooves 17 are connected to the mold cavity. The negative pressure exhaust fans 18 are rotatably disposed on both sides of the negative pressure exhaust grooves 17, with one side of the fan blades extending into the inner cavity of the feed inlet 16 and the other side of the fan blades extending into the negative pressure exhaust grooves 17. When feeding, the flowing material will drive the negative pressure exhaust fans 18 to rotate, and the other side of the fan blades will exhaust the air in the negative pressure exhaust grooves 17 to the outside, creating a negative pressure inside, which is conducive to the discharge of gas from the mold cavity.

[0044] In this implementation plan, reference is made to Figure 14 , 15 A mold fixing plate 6 is provided on the outer side of the mold plate 5. A feeding hopper 7 is provided in the middle of the mold fixing plate 6. The inner end of the feeding hopper 7 is connected to the feeding port 16. There is an exhaust gap 19 between the outer wall of the feeding hopper 7 and the mold fixing plate 6 and the mold plate 5. The outlet end of the negative pressure exhaust groove 17 is connected to the exhaust gap 19. When exhausting, the gas in the cavity is discharged out of the mold through the negative pressure exhaust groove 17 and the exhaust gap 19.

[0045] In this implementation plan, reference is made to Figure 6 , 8The auxiliary venting structure includes an annular groove 1101 disposed inside the first moving mold insert 11 and the first fixed mold insert 21. The first moving mold insert 11 and the first fixed mold insert 21 each have four pieces, which are spliced ​​together to form an annular gear shape. Each tooth groove of the first moving mold insert 11 and the first fixed mold insert 21 has a vent hole 1102 on its inner wall, and each vent hole 1102 is connected to the corresponding annular groove 1101. The first moving mold insert 11 and the first fixed mold insert 21 are provided with connecting holes 1103. Two connecting holes 1103 are connected to each other, so that the annular grooves 1101 inside the first moving mold insert 11 and the first fixed mold insert 21 are connected. The side wall of the first moving mold insert 11 is also provided with an auxiliary venting channel 1104. One end of the auxiliary venting channel 1104 is connected to the annular groove 1101, and the other end is connected to the outside of the mold.

[0046] During use, the gas in the corners of the cavity is discharged into the annular groove 1101 through the exhaust hole 1102, and then discharged through the auxiliary exhaust channel 1104, thereby more thoroughly expelling the gas in the corners of the cavity that is difficult to be discharged, ensuring the quality of the gear product 23.

[0047] In this embodiment, a powder sintered alloy block is embedded at the inner end of the vent 1102. The powder sintered alloy block has a porous structure with a porosity between 30% and 50%, allowing gas to escape quickly through the pores while the molten plastic is blocked. The use of the powder sintered alloy block not only improves the venting effect but also enables it to withstand the high pressure and high temperature during the injection molding process, ensuring the normal operation of the mold.

[0048] In this implementation plan, reference is made to Figure 1 , 2 The demolding structure includes a mounting plate 1, a base plate 2, a moving mold fixing plate 3, a telescopic cylinder 8, and an ejector pin 14. The moving mold fixing plate 3 and the moving template 4 are connected to the base plate 2. Telescopic cylinders 8 are installed at the four corners of the mounting plate 1. The movable end of the telescopic cylinder 8 is connected to the moving mold fixing plate 3. The telescopic cylinder 8 drives the moving mold fixing plate 3 and the moving template 4 to move through the telescopic extension and retraction. One end of the ejector pin 14 is fixed on the mounting plate 1, and the other end passes through the moving mold fixing plate 3 and the moving template 4. During the mold closing stage, the inner end of the ejector pin 14 is flush with the inner wall of the cavity. When demolding, the extension and retraction of the telescopic cylinder 8 causes the moving platen 4 to move away from the fixed platen 5, and the inner end of the ejector pin 14 pushes the gear product 23 out of the cavity, completing the demolding.

[0049] refer to Figure 7 The second moving mold insert 12 is provided with multiple protrusions 1201 and ejector pin holes 1202. The protrusions 1201 can be used to mold the through holes on the gear product 23; the ejector pin holes 1202 are used for the inner end of the ejector pin 14 to pass through.

[0050] Working principle: In use, the first moving mold insert 11, the second moving mold insert 12, and the third moving mold insert 13, which are matched with the gear product 23 to be produced, are installed into the mold cavity of the moving mold plate 4, and the first fixed mold insert 21 and the second fixed mold insert 22, which are matched, are installed into the mold cavity of the fixed mold plate 5. During the mold closing stage, after the injection molding machine issues the mold closing command, the moving platen 4 moves along the guide post towards the fixed platen 5 under the drive of the telescopic cylinder 8, completing the mold closing and forming a complete VGR automotive steering gear shape in the mold cavity. After mold closing, the injection molding machine injects high-temperature, high-pressure molten plastic into the mold cavity through the feed hopper 7 and feed port 16. The molten plastic flows in the cavity, filling the entire cavity and forming the prototype of the VGR automotive steering gear. During the injection molding process, the molten plastic drives the negative pressure exhaust fan 18 inside the feed port 16 to rotate, and the fan blades on the other side exhaust the air in the negative pressure exhaust groove 17 to the outside, creating a negative pressure inside, which helps to expel the gas in the cavity. Meanwhile, when the plastic melt fills the cavity, the gas in the corners of the cavity will be discharged into the annular groove 1101 through the vent hole 1102, and then discharged through the auxiliary venting channel 1104, so as to more thoroughly discharge the corner gas that is difficult to be discharged from the cavity. During the injection molding stage, the cooling temperature of the moving mold plate 4 and the fixed mold plate 5 is controlled by the adjustable water cooling structure. Due to the setting of the main water cooling pipe 9, the bypass water channel 902 and the adjustment component 10, the gear mold can adjust the cooling area and cooling effect according to the cooling requirements of different gear materials, thereby increasing the adaptability of the mold. When the plastic needs slow cooling, the rotation angle of the drive rod 1001 is adjusted so that the connecting channel 1003 is perpendicular to the connecting water channel 901. The connecting water channel 901 is blocked, and the end of the water-cooled main pipe 9 is opened. The cooling liquid only flows through the water-cooled main pipe 9, resulting in slow cooling. When the plastic needs rapid cooling, the drive rod 1001 is rotated so that the connecting channel 1003 is parallel to the connecting water channel 901. The connecting water channel 901 is opened, and the end of the water-cooled main pipe 9 is closed. The water flow of the water-cooled main pipe 9 can enter the bypass water channel 902. At this time, the cooling area increases, the cooling effect is improved, and the cooling time is shortened. During the mold opening stage, the injection molding machine issues a mold opening command, and the moving platen 4 begins to move away from the fixed platen 5. At the same time, the gas-assisted system injects high-pressure gas into the mold cavity, causing the gear product 23 to separate from the mold cavity surface. As the moving mold continues to move, the ejector pin 14, under the action of the ejection device, ejects the gear product 23 from the mold, completing the demolding process.

[0051] This invention employs a highly efficient water cooling method, a unique cooling channel design, and a powerful coolant circulation system, which can quickly remove heat from the mold and significantly shorten the cooling time. Through the arrangement of the main water cooling pipe 9, bypass water channel 902, and adjustment component 10, the cooling area and cooling effect of the gear mold can be adjusted according to the cooling requirements of different gear materials, increasing the mold's adaptability. By setting a negative pressure exhaust structure, when feeding material, the flowing material drives the negative pressure exhaust fan 18 to rotate, causing its blades to expel air from the negative pressure exhaust groove 17, creating a negative pressure inside. This facilitates the discharge of gas from the cavity, preventing residual gas from forming pores on the surface of the gear product 23. By setting an auxiliary exhaust structure, gas from the corners of the cavity can be discharged through the exhaust hole 1102 into the annular groove 1101, and then discharged through the auxiliary exhaust channel 1104, thus more thoroughly removing gas from the corners of the cavity that is difficult to discharge, ensuring the quality of the gear product 23.

[0052] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A VGR automotive steering gear mold structure, characterized in that, include: The moving mold structure includes a moving template (4), and the mold cavity of the moving template (4) is provided with a first moving mold insert (11), a second moving mold insert (12), and a third moving mold insert (13). The fixed mold structure includes a fixed mold plate (5), and the mold cavity of the fixed mold plate (5) is provided with a first fixed mold insert (21) and a second fixed mold insert (22) that match the moving mold insert. The moving mold insert and the fixed mold insert together form the injection cavity of the gear product (23); the fixed mold plate (5) is provided with a feed port (16) in the middle. An adjustable water-cooling structure is installed inside the moving template (4) and the fixed template (5), and is connected to an external water-cooling system to cool the template through flowing low-temperature water. The negative pressure exhaust structure is set at the feed inlet (16) of the fixed template (5) to exhaust the gas in the cavity more efficiently. An auxiliary exhaust structure is provided in the first moving mold insert (11) and the first fixed mold insert (21) to assist in the exhaust of gas at the corners of the cavity, thereby preventing the product from having air holes. A demolding structure is provided to drive the moving mold structure to move, thereby realizing the mold closing and demolding actions.

2. The VGR automotive steering gear mold structure according to claim 1, characterized in that, The adjustable water-cooling structure includes a main water-cooling pipe (9), a bypass water channel (902), and an adjustment component (10). Two main water-cooling pipes (9) are symmetrically arranged in the middle of the moving template (4) and the fixed template (5). One end of the main water-cooling pipe (9) is connected to the outlet pipe of the water-cooling system, and the other end is connected to the inlet pipe of the water-cooling system. At least one bypass water channel (902) is provided on the outside of each main water-cooling pipe (9). The bypass water channel (902) is connected to the main water-cooling pipe (9) through multiple connecting water channels (901). One end of the bypass water channel (902) is sealed, and the other end is connected to the inlet pipe of the water-cooling system through a water pipe. An adjustment component (10) is provided between the water-cooled main pipe (9) and its corresponding bypass water channel (902) for controlling the opening and closing of the connecting water channel (901) and the opening and closing of the end of the water-cooled main pipe (9).

3. The VGR automotive steering gear mold structure according to claim 2, characterized in that, The adjustment assembly (10) includes a drive rod (1001), a drive disc (1002), a connecting channel (1003), and a drive protrusion (1004). The drive rod (1001) is inserted into a moving template (4) or a fixed template (5) between the bypass water channel (902) and the water-cooled main pipe (9). One end of the drive rod (1001) is connected to the drive disc (1002), and the other end is connected to the drive protrusion (1004). The drive rod (1001) is provided with a number of connecting channels (1003) that are the same as the number of connecting water channels (901). When the drive rod (1001) is rotated so that the connecting channel (1003) is parallel to the connecting water channel (901), the connecting water channel (901) is opened, and the water flow of the water-cooled main pipe (9) can enter the bypass water channel (902). When the connecting channel (1003) is perpendicular to the connecting water channel (901), the connecting water channel (901) is blocked. The water-cooled main pipe (9) is provided with a sealing component on the end side near the drive rod (1001). The drive protrusion (1004) can drive the movement of the sealing component to seal the end of the water-cooled main pipe (9).

4. The VGR automotive steering gear mold structure according to claim 3, characterized in that, The sealing assembly includes a sealing disc (2001), a spring (2002), and a sealing rod (2003). The sealing disc (2001) slides on one side of the water-cooled main pipe (9), and the diameter of the sealing disc (2001) is not less than the inner diameter of the water-cooled main pipe (9). One side of the sealing disc (2001) is connected to the sealing rod (2003), which is T-shaped. A spring (2002) is sleeved on the outside of the sealing rod (2003). When the drive rod (1001) rotates, it drives the drive protrusion (1004) to squeeze the sealing rod (2003), thereby causing the sealing rod (2003) to drive the sealing disc (2001) to move into the water-cooled main pipe (9) and seal it. At this time, the spring (2002) is compressed. When the drive protrusion (1004) continues to rotate to release the compression, the spring (2002) returns to its original state and drives the sealing disc (2001) to move and release the seal.

5. The VGR automotive steering gear mold structure according to claim 1, characterized in that, The negative pressure exhaust structure includes multiple negative pressure exhaust grooves (17) evenly distributed around the outer ring of the feed inlet (16) and a negative pressure exhaust fan (18) disposed in the negative pressure exhaust groove (17). The negative pressure exhaust groove (17) is connected to the cavity. The negative pressure exhaust fan (18) is rotatably disposed on both sides of the negative pressure exhaust groove (17). One side of the fan blade of the negative pressure exhaust fan (18) extends into the inner cavity of the feed inlet (16), and the other side of the fan blade extends into the negative pressure exhaust groove (17). When feeding, the flowing material will drive the negative pressure exhaust fan (18) to rotate. The other side of the fan blade will exhaust the air in the negative pressure exhaust groove (17) to the outside, so that a negative pressure is formed inside, which is conducive to the exhaust of gas in the cavity.

6. The VGR automotive steering gear mold structure according to claim 5, characterized in that, The fixed mold plate (6) is provided on the outer side of the fixed mold plate (5). The middle part of the fixed mold plate (6) is provided with a feeding hopper (7). The inner end of the feeding hopper (7) is connected to the feeding port (16). There is an exhaust gap (19) between the outer wall of the feeding hopper (7) and the fixed mold plate (6) and the fixed mold plate (5). The outlet end of the negative pressure exhaust groove (17) is connected to the exhaust gap (19). When exhausting, the gas in the cavity is discharged out of the mold through the negative pressure exhaust groove (17) and the exhaust gap (19).

7. The VGR automotive steering gear mold structure according to claim 1, characterized in that, The auxiliary venting structure includes an annular groove (1101) disposed inside the first moving mold insert (11) and the first fixed mold insert (21). There are four pieces of the first moving mold insert (11) and the first fixed mold insert (21), which are spliced ​​together to form an annular gear shape. Each tooth groove of the first moving mold insert (11) and the first fixed mold insert (21) is provided with a vent hole (1102), and each vent hole (1102) is connected to the corresponding annular groove (1101). The first moving mold insert (11) and the first fixed mold insert (21) are connected by connecting holes (1103). The two connecting holes (1103) are connected to each other, so that the annular groove (1101) in the first moving mold insert (11) and the first fixed mold insert (21) are connected. The side wall of the first moving mold insert (11) is also provided with an auxiliary exhaust channel (1104). One end of the auxiliary exhaust channel (1104) is connected to the annular groove (1101), and the other end is connected to the outside of the mold.

8. The VGR automotive steering gear mold structure according to claim 7, characterized in that, The inner port of the vent (1102) is inlaid with a powder sintered gold block, which has a porous structure with a porosity between 30% and 50%.

9. The VGR automotive steering gear mold structure according to claim 1, characterized in that, The demolding structure includes a mounting plate (1), a base plate (2), a moving mold fixing plate (3), a telescopic cylinder (8), and an ejector pin (14). The moving mold fixing plate (3) is connected to the moving template (4) and the base plate (2). Telescopic cylinders (8) are installed at the four corners of the mounting plate (1). The movable end of the telescopic cylinder (8) is connected to the moving mold fixing plate (3). The telescopic cylinder (8) moves the moving mold fixing plate (3) and the moving template (4) by telescopic extension and retraction. One end of the ejector pin (14) is fixed on the mounting plate (1), and the other end passes through the moving mold fixing plate (3) and the moving template (4). During the mold closing stage, the inner end of the ejector pin (14) is flush with the inner wall of the cavity.

10. The VGR automotive steering gear mold structure according to claim 9, characterized in that, The second moving mold insert (12) is provided with a plurality of protrusions (1201) and ejector pin holes (1202). The protrusions (1201) can be used to form through holes on the gear product (23); the ejector pin holes (1202) are used for the inner end of the ejector pin (14) to pass through.

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