A cold-rustless cast-iron casting sand box with edge exhaust strips and a method of use

Abstract

The application belongs to the technical field of metal casting, and particularly relates to a cold-blast-free cast iron casting sand box with edge exhaust strips and a use method thereof. The cold-blast-free cast iron casting sand box with edge exhaust strips comprises a bottom plate, a lower casting sand box fixedly connected to the bottom plate, an upper casting sand box connected to the lower casting sand box, exhaust strip bodies symmetrically arranged on the upper casting sand box, exhaust holes arranged in an array on the exhaust strip bodies, an adjusting mechanism arranged on the upper casting sand box and used for adjusting the closed state of the exhaust holes, a lower mold arranged in the lower casting sand box, an upper mold arranged above the lower mold, and a connecting pipe connected to a casting pipe and arranged on the top of the upper mold. The cold-blast-free cast iron casting sand box with edge exhaust strips and the use method thereof are characterized in that the exhaust strip structure is additionally arranged at the edge of the casting sand box, water vapor generated by the heating of water in the sand mold is quickly discharged through the exhaust channel, and defects such as pores, shrinkage, and necking of the castings are eliminated.

Description

Technical Field

[0001] This invention belongs to the field of metal casting technology, specifically a casting sand box for cast iron without cold runner and a method for using it, with an edge venting strip. Background Technology

[0002] Cast iron casting sand boxes are mostly made of cast iron and consist of upper and lower matching boxes. They are mainly used to enclose and compact loose molding sand to fix it into shape. The rigidity of the box makes it easy to place molds to make casting cavities. The box structure is used to lift and transport sand molds. When pouring high-temperature molten iron, it resists the outward pressure of molten iron to prevent the box from expanding and leaking molten iron. The pin structure ensures that the upper and lower boxes are accurately closed without deviation. After the casting cools and the sand falls off, it can be cleaned and reused. It is an indispensable tool for sand casting.

[0003] Chinese patent CN114589292A discloses a sand casting method and a casting sand box. This casting sand box includes a movable base with wheels fixedly connected to its bottom and an outer sand box fixedly connected to its top. An inner sand box is fixedly connected inside the outer sand box, and a mold cavity is placed inside the inner sand box. An overflow pipe is fixedly connected to the bottom of the mold cavity. The casting method includes the following steps: ventilation, casting, curing, and part removal. This invention, by setting up an annular pipe, allows the mold cavity temperature to rise during heating, causing the thermoplastic in the annular pipe to melt. The melted thermoplastic flows out from the overflow hole and permeates into the molding sand near the mold cavity, causing the thermoplastic and molding sand to sinter and solidify. This increases the strength of the sand mold at the joints of the mold cavity, thereby reducing the amount of sand particles falling into the mold cavity, preventing sand inclusions in the casting, and reducing the surface quality of the casting.

[0004] Traditional casting processes for pipe fittings and automotive parts have certain technical shortcomings: reliance on heavy cold runners and thick-walled square piers results in low molten iron utilization, high raw material consumption and production costs, and the mold and base plate are welded together, limiting their application to a single product. Changeover costs are high, production flexibility is poor, and the sand box layer is too thick with a lack of dedicated venting structures, leading to high sand consumption and limited single-batch production capacity. Furthermore, the reliance on cold runners to treat moisture makes it difficult to eliminate defects such as porosity, shrinkage, and narrowing, thus limiting their overall capabilities.

[0005] Therefore, the present invention provides a cast iron casting sand box with edge venting strips and a method for using it. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies and solve the problems of inconvenient venting and mold replacement, this invention proposes a cold-capped cast iron casting sand box with edge venting strips and its usage method.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention comprises a casting sand box for cast iron without cold runner with edge venting strips, including a base plate, a lower casting sand box fixedly connected to the base plate, an upper casting sand box connected to the lower casting sand box, a casting pipe provided at the top of the upper casting sand box, venting strip bodies symmetrically arranged on the upper casting sand box, venting holes arrayed on the venting strip bodies, an adjustment mechanism for adjusting the closing state of the venting holes provided on the upper casting sand box, a lower mold provided inside the lower casting sand box, an upper mold provided above the lower mold, a connecting pipe connected to the casting pipe connected to the top of the upper mold, limit plates symmetrically arranged on the lower mold, guide rings symmetrically arranged on the limit plates, and slots fixedly arranged on the limit plates, a strip box provided inside the base plate, a sliding groove provided on the strip box, a positioning mechanism for positioning the slot position provided inside the strip box, a base frame fixedly arranged at the bottom of the base plate, a driving mechanism provided on the base frame, and a controller provided on the front of the base frame.

[0008] By adopting the above scheme, after the upper and lower molds are connected and closed, and the upper and lower casting sand boxes are fixedly connected, scrap steel raw materials are melted into molten iron. Through the cooperation of casting pipes and connecting pipes, the molten iron is easily introduced into the upper and lower molds. After the molten iron fills the cavity, it is cooled by cooling equipment, thereby shaping the workpiece and achieving the purpose of casting. The venting strip body added to the edge of the upper casting sand box utilizes a continuous venting channel to quickly expel water vapor generated by the evaporation of moisture in the sand box, eliminating defects such as porosity, shrinkage, and narrowing in the casting, improving the utilization rate of molten iron, and reducing raw material costs. Furthermore, the venting strip body has a small structural volume, consumes very little material, and generates no additional metal waste. Multiple rounds of testing have verified that, while ensuring the casting is free of porosity and shrinkage defects, production costs are simultaneously reduced. The base plate and lower mold have pre-set locking structures for positioning. When the positioning mechanism engages with the slot, it positions the lower mold. When the casting mold needs to be replaced, the positioning mechanism is controlled to move, and the position of the limiting plate is no longer limited by the slot. This allows the lower mold and upper mold to be disassembled. After the lower mold is replaced, the guide ring on the limiting plate engages with the calibration shaft, which calibrates the position of the lower mold. After the lower mold is moved to the installation point, the positioning mechanism is controlled to move through the slot to reposition the lower mold. This facilitates quick positioning and disassembly of the lower mold. Standardized slots are provided to facilitate the disassembly or installation of molds of various specifications. Different cavity molds can be quickly disassembled and replaced according to production needs. Compared with traditional welded and fixed integrated molds, it is compatible with multiple products and reduces mold development and replacement costs.

[0009] Preferably, hooks are symmetrically arranged on the upper casting sand box, the upper casting sand box and the lower casting sand box are fixedly connected by a lock, and limit shafts are symmetrically arranged on the lower casting sand box, with one end of the limit shaft extending into the interior of the upper casting sand box.

[0010] By adopting the above scheme, when the upper and lower casting sand boxes are spliced, the position of the upper casting sand box can be calibrated and limited by the limiting shaft.

[0011] Preferably, the adjustment mechanism includes a movable groove, a guide groove, a connecting plate, an exhaust pipe, an air outlet, a sealing plug, and a drive assembly. The movable groove is symmetrically arranged on the upper casting sand box. The guide groove array corresponding to the exhaust outlet is arranged on the movable groove. The connecting plate passes through the inside of the guide groove, and one end of the connecting plate extends into the inside of the movable groove. The exhaust pipe passes through the inside of the exhaust outlet. The air outlet is arranged on the exhaust pipe and is connected to the exhaust pipe. The sealing plug is arranged around the exhaust pipe. The drive assembly for driving the exhaust pipe to move is arranged inside the movable groove.

[0012] By adopting the above scheme, the position of the connecting plate can be adjusted by the drive component. When the connecting plate moves, it will drive the exhaust pipe and the sealing plug to move. When the exhaust pipe moves outward, it will drive the vent hole to move synchronously. After the vent hole moves out of the exhaust hole, it will no longer be sealed. The vent hole facilitates the discharge of water vapor inside the upper and lower casting sand boxes. Conversely, by adjusting the movement of the exhaust pipe, the vent hole will be sealed after entering the vent hole, thus preventing the discharge of water vapor inside the upper and lower casting sand boxes. This allows for flexible adjustment of the opening and closing state of the vent hole.

[0013] Preferably, the drive assembly includes a protective box, a power motor, a load-bearing plate, a threaded ring, and a threaded rod. The protective box is fixed to the side of the movable groove, the power motor is fixed inside the protective box, the load-bearing plate is disposed inside the movable groove, and one end of the load-bearing plate is fixedly connected to the connecting plate. The threaded ring is disposed inside the load-bearing plate, the outer surface of the threaded rod is threadedly connected to the threaded ring, and one end of the threaded rod is fixedly connected to the output end of the power motor. A guide shaft is inserted inside the load-bearing plate, and the end of the guide shaft is fixedly connected to the inner wall of the movable groove.

[0014] By adopting the above scheme, the operation of the power motor will drive the threaded rod to rotate. When the threaded rod rotates, it will adjust the position of the load-bearing plate. When the load-bearing plate moves, it will be guided by the guide shaft to make the load-bearing plate move smoothly. When the load-bearing plate moves, it will drive the exhaust pipe to move synchronously through the connecting plate, thereby achieving the purpose of adjusting the position of the exhaust pipe. When the load-bearing plate moves, it will be guided by the guide shaft to make the load-bearing plate move smoothly.

[0015] Preferably, the base plate is symmetrically provided with calibration shafts corresponding to the guide ring, and the calibration shafts pass through the inside of the guide ring.

[0016] By adopting the above scheme, the position of the lower mold will be calibrated and limited through the cooperation of the calibration shaft and guide ring.

[0017] Preferably, the positioning mechanism includes a locking block, a protective box, and an adjustment component. The locking blocks are symmetrically arranged inside the strip box and engage with the locking slots. The protective box is fixed inside the strip box, and the adjustment component for adjusting the movement of the locking blocks is arranged inside the strip box.

[0018] By adopting the above solution, the position of the locking block can be adjusted by adjusting the movement of the components. After the locking block moves and engages with the slot, it will position the lower mold. Conversely, after the locking block separates from the slot, it is convenient to disassemble and replace the lower mold.

[0019] Preferably, the adjustment assembly includes a dual-output shaft motor, a power rod, and a threaded screw. The dual-output shaft motor is fixed inside the protective box, the power rod is rotatably mounted inside the protective box, the outer surface of the threaded screw is threadedly connected to the inside of the locking block, and one end of the threaded screw is fixedly connected to the end of the power rod. A shaft is fixedly mounted inside the strip box, and the shaft penetrates the inside of the locking block.

[0020] By adopting the above scheme, the controller can control the operation of electronic equipment. Controlling the dual-output shaft motor will drive the power rod to rotate. When the power rod rotates, it will drive the threaded screw to rotate. When the threaded screw rotates, the position of the locking block can be adjusted. When the locking block moves, the shaft will guide and limit the locking block, so that the locking block moves smoothly.

[0021] Preferably, a positioning groove is provided on the side of the calibration shaft, and a frame is symmetrically provided on the limiting plate. The frame is located on one side of the slot, and a connecting groove is provided inside the frame. The connecting groove is connected to the slot, and a conical block is inserted inside the connecting groove.

[0022] By adopting the above scheme, the calibration shaft positioning groove provides installation space, the conical block can slide inside the connecting groove, and when the locking block engages with the locking groove, the locking block can be pushed to move when it contacts the side of the conical block.

[0023] Preferably, a sliding plate is provided inside the frame, and the sliding plate is fixedly connected to one end of the conical block. A reset rod is arranged in an array inside the frame, and the reset rod passes through the sliding plate. A reset spring is arranged around the reset rod, and the ends of the reset spring are fixedly connected to the frame and the sliding plate respectively. A groove is provided inside the limiting plate, and the end of the groove is connected to the inside of the guide ring and the groove is connected to the inside of the frame. A driving block is provided inside the groove, and the driving block is fixedly connected to the sliding plate. A positioning block is fixedly connected to one end of the driving block, and the other end of the positioning block extends into the positioning groove.

[0024] By adopting the above scheme, when positioning and installing the lower mold, after the positioning block is located on one side of the positioning groove, when the drive block engages with the groove, the drive block will push the conical block to move. When the conical block moves, the positioning block can be moved by the cooperation of the sliding plate and the drive block. After the positioning block moves into the corresponding positioning groove, the position of the limiting plate will be positioned by the cooperation of the positioning block, the positioning groove, the calibration shaft and the guide ring, which can further improve the stability of the lower mold installation.

[0025] Preferably, the driving mechanism includes a square slot, a driving plate, a support plate, and an adjusting screw. The square slot is symmetrically arranged on the base frame. The driving plate passes through the square slot, and its bottom end extends into the base frame. The support plate is fixed to the top of the driving plate and is located below the hook. The adjusting screw is rotatably arranged inside the base frame, and its outer surface is threadedly connected to the inside of the driving plate. An electromagnet is fixedly arranged on the side of the square slot. A limit rod is fixedly arranged inside the base frame, and the limit rod passes through the driving plate. A reducer is fixedly arranged inside the base frame. A drive motor is fixedly installed on the reducer, and the output end of the drive motor is fixedly connected to the input end of the reducer. Both the reducer and the adjusting screw are provided with transmission wheels, and the transmission wheels are connected by belt drive.

[0026] A method for using a cast iron casting sand box with edge venting strips and no cold-feather casting includes the following steps: S1. After the upper mold and lower mold are connected and closed, and the upper casting sand box and lower casting sand box are fixedly connected, the scrap steel raw material is melted into molten iron from the outside. Through the casting pipe and connecting pipe, the molten iron can be easily put into the upper mold and lower mold. S2. After the molten iron fills the cavity, it is cooled down by a cooling device, thereby forming the workpiece and realizing the casting of the workpiece. S3. An exhaust strip body is added to the edge of the upper casting sand box to discharge water vapor generated by the evaporation of moisture in the sand box due to heating.

[0027] The beneficial effects of this invention are as follows: 1. The present invention relates to a casting sand box with an edge venting bar and a method for using a cold-capped cast iron casting sand box. The present invention adds a venting bar structure to the edge of the casting sand box, which relies on a continuous and through-hole venting channel to quickly remove water vapor generated by heating in the sand mold, thereby eliminating defects such as porosity, shrinkage, and narrowing of the casting. It no longer relies on the traditional cold cap to collect gas and compensate for casting shrinkage. Under the same amount of molten iron, the casting output is increased, the utilization rate of molten iron is improved, and the raw material cost is reduced. At the same time, the overall size of the venting bar is small, the material consumption is extremely low, and no additional metal waste is generated. After multiple rounds of production tests, it has been verified that it can effectively reduce the overall production cost while stably ensuring that the casting is free of porosity and shrinkage defects.

[0028] 2. The present invention relates to a cast iron casting sand box with edge venting strips and a method of use, wherein the drive motor drives the adjusting screw to rotate, thereby adjusting the position of the drive plate. The drive plate moves and drives the bearing plate to move synchronously. The bearing plate pushes the upper casting sand box upward with the help of hooks. When venting is required, the upper casting sand box and the lower casting sand box are separated from each other. The gap formed by the separation of the two is used to achieve rapid venting and effectively improve the venting effect.

[0029] 3. The present invention relates to a casting sand box for cast iron without cold runners with an edge venting strip and its usage method. When changing the casting mold, the dual-output shaft motor is driven to rotate the power rod, which is synchronously linked to the rotation of the threaded screw to adjust the position of the locking block. During the movement of the locking block, the shaft body provides guidance and limit, ensuring smooth sliding. After the locking block is completely separated from the mold slot, the lower mold can be easily removed for replacement. When installing the new lower mold, the guide ring on the limit plate and the calibration shaft are engaged to accurately correct the position of the lower mold. After the mold is in place at the installation reference point, the positioning mechanism is activated to make the locking block re-engage in the slot to complete the locking and positioning, realizing the quick disassembly and positioning of the lower mold. The equipment has a standardized slot structure, which can be adapted to the disassembly and assembly of various specifications of cavity molds. Different molds can be quickly switched according to production orders. Compared with the traditional welded integrated fixed mold, one base plate can be compatible with the production of multiple products, effectively reducing the investment in mold development and mold replacement, and improving the production line flexibility.

[0030] 4. The cold-dip cast iron casting sand box with edge venting strip of the present invention and its usage method, when performing the lower mold positioning and installation operation, first align the positioning block with one side of the positioning groove, and then drive the locking block to lock into the groove; during the advancement of the locking block, the cone block is displaced by pressing against it, and the cone block drives the positioning block to move synchronously through the sliding plate and the driving block until the positioning block is embedded in the corresponding positioning groove. Relying on the multiple structures of positioning block, positioning groove, calibration shaft and guide ring working together to lock the limiting plate, the multiple positioning constraints can further improve the overall stability of the lower mold after assembly. Attached Figure Description

[0031] The invention will now be further described with reference to the accompanying drawings.

[0032] Figure 1 This is a perspective view of the cold-capped cast iron casting sand box with edge venting strips of the present invention; Figure 2 This is a schematic diagram of the structure of the lower casting sand box and the upper casting sand box in this invention; Figure 3 This is a schematic diagram of the structure of the movable groove in this invention; Figure 4 This is a schematic diagram of the load-bearing plate of the present invention; Figure 5 This is a schematic diagram of the structure of the upper mold and the lower mold in this invention; Figure 6This is a schematic diagram of the structure of the bar box in this invention; Figure 7 This is the present invention. Figure 5 Enlarged schematic diagram of structure A in the middle; Figure 8 This is a schematic diagram of the frame and groove in this invention; Figure 9 This is a schematic diagram of the drive plate and the load-bearing plate in this invention.

[0033] In the diagram: 1. Base plate; 2. Lower casting sand box; 3. Upper casting sand box; 4. Hook; 5. Casting pipe; 6. Vent hole; 7. Vent strip body; 8. Movable groove; 9. Protective box; 10. Power motor; 11. Guide groove; 12. Connecting plate; 13. Vent pipe; 14. Air outlet; 15. Sealing plug; 16. Load-bearing plate; 17. Guide shaft; 18. Threaded ring; 19. Threaded rod; 20. Limiting shaft; 21. Upper mold; 22. Connecting pipe; 23. Lower mold; 24. Limiting plate; 25. Guide ring; 26. Slot; 27. Calibration shaft; 28. Strip box; 2 9. Slide groove; 30. Clamping block; 31. Shaft body; 32. Protective box; 33. Dual-output shaft motor; 34. Power rod; 35. Threaded screw; 36. Positioning groove; 37. Frame; 38. Connecting groove; 39. Conical block; 40. Sliding plate; 41. Reset rod; 42. Reset spring; 43. Groove body; 44. Drive block; 45. Positioning block; 46. Base frame; 47. Controller; 48. Square groove; 49. Electromagnet; 50. Drive plate; 51. Bearing plate; 52. Adjusting screw; 53. Limit rod; 54. Reducer; 55. Drive motor; 56. Transmission wheel. Detailed Implementation

[0034] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0035] like Figures 1 to 9As shown, the cold-fall-free cast iron casting sand box with edge venting bars of this invention includes a base plate 1, a lower casting sand box 2 fixedly connected to the base plate 1, an upper casting sand box 3 connected to the lower casting sand box 2, a casting pipe 5 provided at the top of the upper casting sand box 3, venting bar bodies 7 symmetrically arranged on the upper casting sand box 3, venting holes 6 arranged in an array on the venting bar bodies 7, an adjustment mechanism for adjusting the closed state of the venting holes 6 provided on the upper casting sand box 3, a lower mold 23 provided inside the lower casting sand box 2, an upper mold 21 provided above the lower mold 23, and the upper mold 2... The top is connected to a connecting pipe 22 that is connected to the casting pipe 5. The lower mold 23 is symmetrically provided with limit plates 24, guide rings 25 are symmetrically provided on the limit plates 24, and slots 26 are fixedly provided on the limit plates 24. A strip box 28 is provided inside the bottom plate 1, a sliding groove 29 is provided on the strip box 28, and a positioning mechanism for positioning the slots 26 is provided inside the strip box 28. A base frame 46 is fixedly provided at the bottom of the bottom plate 1, a drive mechanism is provided on the base frame 46, and a controller 47 is provided on the front of the base frame 46.

[0036] When using a cast iron casting sand box with an edge venting strip to produce automotive parts, after the upper mold 21 and lower mold 23 are connected and closed, and the upper casting sand box 3 and lower casting sand box 2 are fixedly connected, scrap steel raw materials are melted into casting iron. Through the casting pipe 5 and connecting pipe 22, the molten iron is easily introduced into the upper mold 21 and lower mold 23. After the molten iron fills the cavity, it is cooled down by a cooling device (existing technology), which allows the workpiece to be formed, thus achieving the purpose of casting the workpiece. The venting strip body 7 added to the edge of the upper casting sand box 3 uses a continuous venting channel to quickly discharge the water vapor generated by the evaporation of moisture in the sand box due to heating. The venting strip body 7 has a small structure volume, consumes very little material, and generates no additional metal waste. After multiple rounds of testing and verification, production costs are reduced simultaneously while ensuring that the castings are free of porosity and shrinkage defects.

[0037] The base plate 1 and the lower mold 23 are pre-set with a locking structure for positioning. When the positioning mechanism engages with the slot 26, it will position the lower mold 23. When the casting mold needs to be replaced, the positioning mechanism is controlled to move and the position of the limiting plate 24 is no longer limited by the slot 26. Then the lower mold 23 and the upper mold 21 can be disassembled. After the lower mold 23 is replaced, the guide ring 25 on the limiting plate 24 engages with the calibration shaft 27, which will calibrate the position of the lower mold 23. After the lower mold 23 is moved to the installation point, the positioning mechanism is controlled to move through the slot 26 to reposition the position of the lower mold 23. This facilitates quick positioning and disassembly of the lower mold 23. The standardized slot 26 is reserved, which facilitates the disassembly or installation of molds of various specifications. Different cavity molds can be quickly disassembled and replaced according to production needs. Compared with the traditional welded and fixed integrated mold, it is compatible with multiple products, reduces mold development and replacement costs, and improves the flexibility of the production line. The controller 47 is electrically connected to the electronic equipment on the cast iron casting sand box with edge venting strips and can control the operation of the electronic equipment on the cast iron casting sand box with edge venting strips and without cold top.

[0038] Furthermore, hooks 4 are symmetrically arranged on the upper casting sand box 3, and the upper casting sand box 3 and the lower casting sand box 2 are fixedly connected by a lock. Limiting shafts 20 are symmetrically arranged on the lower casting sand box 2, and one end of the limiting shafts 20 extends into the interior of the upper casting sand box 3.

[0039] When the upper casting sand box 3 and the lower casting sand box 2 are spliced, the position of the upper casting sand box 3 can be calibrated and limited by the limiting shaft 20.

[0040] Furthermore, the adjustment mechanism includes a movable groove 8, a guide groove 11, a connecting plate 12, an exhaust pipe 13, an air outlet 14, a sealing plug 15, and a drive assembly. The movable groove 8 is symmetrically arranged on the upper casting sand box 3. The guide grooves 11 corresponding to the exhaust outlet 6 are arranged in an array on the movable groove 8. The connecting plate 12 passes through the inside of the guide groove 11, and one end of the connecting plate 12 extends into the inside of the movable groove 8. The exhaust pipe 13 passes through the inside of the exhaust outlet 6. The air outlet 14 is arranged on the exhaust pipe 13 and is connected to the exhaust pipe 13. The sealing plug 15 is arranged around the exhaust pipe 13. The drive assembly for driving the exhaust pipe 13 to move is arranged inside the movable groove 8.

[0041] The position of the connecting plate 12 can be adjusted by the drive component. When the connecting plate 12 moves, it will drive the exhaust pipe 13 and the sealing plug 15 to move. When the exhaust pipe 13 moves outward, it will drive the vent 14 to move synchronously. After the vent 14 moves out of the exhaust hole 6, it will no longer seal the exhaust hole 6. The vent hole 6 facilitates the discharge of water vapor inside the upper casting sand box 3 and the lower casting sand box 2. Conversely, by adjusting the movement of the exhaust pipe 13, the vent 14 will enter the vent hole 6 and seal the vent hole 6, thus no longer discharging water vapor inside the upper casting sand box 3 and the lower casting sand box 2. This allows for flexible adjustment of the opening and closing state of the vent hole 6.

[0042] Furthermore, the drive assembly includes a protective box 9, a power motor 10, a load-bearing plate 16, a threaded ring 18, and a threaded rod 19. The protective box 9 is fixed to the side of the movable groove 8, the power motor 10 is fixed inside the protective box 9, the load-bearing plate 16 is disposed inside the movable groove 8, and one end of the load-bearing plate 16 is fixedly connected to the connecting plate 12. The threaded ring 18 is disposed inside the load-bearing plate 16, the outer surface of the threaded rod 19 is threadedly connected to the threaded ring 18, and one end of the threaded rod 19 is fixedly connected to the output end of the power motor 10. A guide shaft 17 is inserted inside the load-bearing plate 16, and the end of the guide shaft 17 is fixedly connected to the inner wall of the movable groove 8.

[0043] The operation of the control motor 10 will drive the threaded rod 19 to rotate. When the threaded rod 19 rotates, it will adjust the position of the load-bearing plate 16. When the load-bearing plate 16 moves, it will be guided by the guide shaft 17 to make the load-bearing plate 16 move smoothly. When the load-bearing plate 16 moves, it will drive the exhaust pipe 13 to move synchronously through the connecting plate 12, thereby achieving the purpose of adjusting the position of the exhaust pipe 13. When the load-bearing plate 16 moves, it will be guided by the guide shaft 17 to make the load-bearing plate 16 move smoothly.

[0044] Furthermore, the base plate 1 is symmetrically provided with calibration shafts 27 corresponding to the guide ring 25, and the calibration shafts 27 pass through the inside of the guide ring 25.

[0045] By cooperating with the calibration shaft 27 and the guide ring 25, the position of the lower mold 23 will be calibrated and limited.

[0046] Furthermore, the positioning mechanism includes a locking block 30, a protective box 32, and an adjustment component. The locking blocks 30 are symmetrically arranged inside the bar box 28 and engage with the locking slot 26. The protective box 32 is fixed inside the bar box 28, and the adjustment component for adjusting the movement of the locking blocks 30 is arranged inside the bar box 28.

[0047] The position of the locking block 30 can be adjusted by adjusting the movement of the components. After the locking block 30 moves and engages with the slot 26, it will position the lower mold 23. Conversely, after the locking block 30 separates from the slot 26, it is convenient to disassemble and replace the lower mold 23.

[0048] Furthermore, the adjustment assembly includes a dual-output shaft motor 33, a power rod 34, and a threaded screw 35. The dual-output shaft motor 33 is fixed inside the protective box 32. The power rod 34 is rotatably mounted inside the protective box 32. The outer surface of the threaded screw 35 is threadedly connected to the inside of the locking block 30, and one end of the threaded screw 35 is fixedly connected to the end of the power rod 34. A shaft 31 is fixedly mounted inside the strip box 28, and the shaft 31 penetrates the inside of the locking block 30.

[0049] The controller 47 can control the operation of electronic equipment. Controlling the dual-axis motor 33 will drive the power rod 34 to rotate. When the power rod 34 rotates, it will drive the threaded screw 35 to rotate. When the threaded screw 35 rotates, the position of the locking block 30 can be adjusted. When the locking block 30 moves, the shaft 31 will guide and limit the locking block 30, so that the locking block 30 moves smoothly.

[0050] Furthermore, a positioning groove 36 is provided on the side of the calibration shaft 27, and a frame 37 is symmetrically provided on the limiting plate 24. The frame 37 is located on one side of the slot 26. A connecting groove 38 is provided inside the frame 37, and the connecting groove 38 is connected to the slot 26. A conical block 39 passes through the inside of the connecting groove 38.

[0051] The calibration shaft 27 provides installation space for the positioning groove 36. The conical block 39 can slide inside the connecting groove 38. When the locking block 30 is engaged with the locking groove 26, and the locking block 30 contacts the side of the conical block 39, the conical block 39 can be pushed to move.

[0052] Furthermore, a sliding plate 40 is provided inside the frame 37, and the sliding plate 40 is fixedly connected to one end of the conical block 39. A reset rod 41 is arranged in an array inside the frame 37, and the reset rod 41 passes through the sliding plate 40. A reset spring 42 is arranged around the reset rod 41, and the ends of the reset spring 42 are fixedly connected to the frame 37 and the sliding plate 40 respectively. A groove 43 is provided inside the limiting plate 24, and the end of the groove 43 is connected to the inside of the guide ring 25. The groove 43 is also connected to the inside of the frame 37. A driving block 44 is provided inside the groove 43, and the driving block 44 is fixedly connected to the sliding plate 40. A positioning block 45 is fixedly connected to one end of the driving block 44, and the other end of the positioning block 45 extends into the positioning groove 36.

[0053] When positioning and installing the lower mold 23, after positioning block 45 is positioned on one side of positioning groove 36, when drive block 30 engages with groove 26, block 30 will push tapered block 39 to move. When tapered block 39 moves, it can move positioning block 45 through sliding plate 40 and drive block 44. After positioning block 45 moves into the corresponding positioning groove 36, positioning block 45, positioning groove 36, calibration shaft 27 and guide ring 25 will cooperate to position the limit plate 24, which can further improve the stability of lower mold 23 installation.

[0054] Furthermore, the drive mechanism includes a square groove 48, a drive plate 50, a support plate 51, and an adjusting screw 52. The square groove 48 is symmetrically arranged on the base frame 46. The drive plate 50 passes through the square groove 48, and its bottom end extends into the base frame 46. The support plate 51 is fixed to the top of the drive plate 50 and is located below the hook 4. The adjusting screw 52 is rotatably arranged inside the base frame 46, and its outer surface is threadedly connected to the inside of the drive plate 50. An electromagnet 49 is fixedly arranged on the side of the square groove 48. A limit rod 53 is fixedly arranged inside the base frame 46 and passes through the drive plate 50. A reducer 54 is fixedly arranged inside the base frame 46. A drive motor 55 is fixedly installed on the reducer 54, and the output end of the drive motor 55 is fixedly connected to the input end of the reducer 54. Both the reducer 54 and the adjusting screw 52 are provided with transmission wheels 56, and the transmission wheels 56 are connected by belt drive.

[0055] The operation of the drive motor 55 drives the reducer 54 to move, which in turn drives the adjusting screw 52 to rotate via the transmission wheel 56. This allows for the adjustment of the position of the drive plate 50. The drive plate 50 moves smoothly by being guided by the limit rod 53. The movement of the drive plate 50 is also guided by the support plate 51, which in turn pushes the upper casting sand box 3 upward via the hook 4. The workpiece is formed in the lower mold 23 and the upper mold 21. The upward movement of the upper casting sand box 3 does not affect the forming of the workpiece. When venting is required, the upper casting sand box 3 can be separated from the lower casting sand box 2 through the above steps. The gap created by the separation allows for rapid venting and improves the venting effect. This method can also help separate the upper casting sand box 3 from the lower casting sand box 2 for disassembly.

[0056] Working Principle: First, when casting automotive parts using a cast iron sand box with edge venting strips for cold-feather casting, the upper mold 21 and lower mold 23 are connected and closed, and the upper casting sand box 3 and lower casting sand box 2 are fixedly connected. Scrap steel is melted into molten casting iron, which is then easily fed into the upper mold 21 and lower mold 23 via the casting pipe 5 and connecting pipe 22. After the molten iron fills the cavity, it is cooled by a cooling device, thus shaping the workpiece and achieving the purpose of casting. The venting strip body 7 added to the edge of the upper casting sand box 3 uses a continuous venting channel to quickly expel the water vapor generated by the evaporation of moisture in the sand box due to heating. The venting strip body 7 has a small structure, consumes very little material, and produces no additional metal waste. Material generation, verified through multiple rounds of testing, ensures that the castings are free of porosity and shrinkage defects while simultaneously reducing production costs. The power motor 10 drives the threaded rod 19 to rotate, adjusting the position of the load-bearing plate 16. As the load-bearing plate 16 moves, it is guided by the guide shaft 17, ensuring smooth movement. The movement of the load-bearing plate 16, via the connecting plate 12, causes the exhaust pipe 13 to move synchronously. The movement of the connecting plate 12, in turn, moves the exhaust pipe 13 and the sealing plug 15. As the exhaust pipe 13 moves outward, it causes the vent hole 14 to move synchronously. After the vent hole 14 moves out of the exhaust hole 6, it is no longer sealed, allowing for the convenient release of moisture from the upper and lower casting sand boxes 3 and 2. Conversely, adjusting the movement of the exhaust pipe 13 allows the vent 14 to enter the exhaust hole 6, sealing the exhaust hole 6 and preventing the release of moisture from the upper casting sand box 3 and lower casting sand box 2. This facilitates flexible adjustment of the opening and closing state of the exhaust hole 6. The base plate 1 and lower mold 23 have pre-set locking structures for positioning. When the positioning mechanism engages with the slot 26, it positions the lower mold 23. When the casting mold needs to be replaced, controlling the dual-shaft motor 33 will drive the power rod 34 to rotate. The rotation of the power rod 34 will drive the threaded screw 35 to rotate. The rotation of the threaded screw 35 can adjust the position of the locking block 30. When the locking block 30 moves, the shaft 31 guides and limits its movement, ensuring smooth movement. After the slot 26 is separated, it is convenient to disassemble and replace the lower mold 23. After the replacement lower mold 23 is replaced, the guide ring 25 on the limit plate 24 will engage with the calibration shaft 27 to calibrate the position of the lower mold 23. After the lower mold 23 is moved to the installation point, the control positioning mechanism will move through the slot 26 to reposition the lower mold 23, which facilitates quick positioning and disassembly of the lower mold 23. When positioning and installing the lower mold 23, after the positioning block 45 is located on one side of the positioning groove 36, when the drive block 30 engages with the slot 26, the block 30 will push the conical block 39 to move. When the conical block 39 moves, the sliding plate 40 and the drive block 44 cooperate to move the positioning block 45. After the positioning block 45 moves into the corresponding positioning groove 36,The positioning block 45, positioning groove 36, calibration shaft 27, and guide ring 25 work together to position the limiting plate 24, further improving the stability of the lower mold 23 installation. A standardized retaining groove 26 is provided for easy disassembly and installation of molds of various specifications. Different cavity molds can be quickly disassembled and replaced according to production needs. Compared to traditional welded and fixed integrated molds, this design is compatible with multiple products, reducing mold development and replacement costs and improving production line flexibility.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cast iron sand casting box with edge venting strips and no cold-feather casting, comprising a base plate (1), characterized in that: The bottom plate (1) is fixedly connected to the lower casting sand box (2), the lower casting sand box (2) is connected to the upper casting sand box (3), the top of the upper casting sand box (3) is provided with a casting pipe (5), the upper casting sand box (3) is symmetrically provided with an exhaust strip body (7), the exhaust strip body (7) is provided with an array of exhaust holes (6), and the upper casting sand box (3) is provided with an adjustment mechanism for adjusting the closed state of the exhaust holes (6); The lower casting sand box (2) is provided with a lower mold (23), and an upper mold (21) is provided above the lower mold (23). The top of the upper mold (21) is connected to a connecting pipe (22) that is connected to the casting pipe (5). Limiting plates (24) are symmetrically provided on the lower mold (23). Guide rings (25) are symmetrically provided on the limiting plates (24). A slot (26) is fixedly provided on the limiting plates (24). A strip box (28) is provided inside the base plate (1). A sliding groove (29) is provided on the strip box (28). A positioning mechanism for positioning the slot (26) is provided inside the strip box (28). A base frame (46) is fixedly provided at the bottom of the base plate (1). A driving mechanism is provided on the base frame (46). A controller (47) is provided on the front of the base frame (46).

2. The cast iron casting sand box with edge venting strips and no cold-feather casting as described in claim 1, characterized in that: Hooks (4) are symmetrically arranged on the upper casting sand box (3). The upper casting sand box (3) and the lower casting sand box (2) are fixedly connected by a lock. Limiting shafts (20) are symmetrically arranged on the lower casting sand box (2), and one end of the limiting shaft (20) extends into the upper casting sand box (3).

3. The cast iron casting sand box with edge venting strips and no cold-feather casting as described in claim 2, characterized in that: The adjustment mechanism includes a movable groove (8), a guide groove (11), a connecting plate (12), an exhaust pipe (13), an air outlet (14), a sealing plug (15), and a drive assembly. The movable groove (8) is symmetrically arranged on the upper casting sand box (3). The guide grooves (11) corresponding to the exhaust outlet (6) are arranged in an array on the movable groove (8). The connecting plate (12) passes through the inside of the guide groove (11), and one end of the connecting plate (12) extends into the inside of the movable groove (8). The exhaust pipe (13) passes through the inside of the exhaust outlet (6). The air outlet (14) is arranged on the exhaust pipe (13), and the air outlet (14) is connected to the exhaust pipe (13). The sealing plug (15) is arranged around the exhaust pipe (13). The drive assembly for driving the exhaust pipe (13) to move is arranged inside the movable groove (8).

4. The cast iron casting sand box with edge venting strips and no cold-feather casting as described in claim 3, characterized in that: The drive assembly includes a protective box (9), a power motor (10), a load-bearing plate (16), a threaded ring (18), and a threaded rod (19). The protective box (9) is fixed to the side of the movable groove (8), the power motor (10) is fixed inside the protective box (9), the load-bearing plate (16) is set inside the movable groove (8), and the load-bearing plate (16) is fixedly connected to one end of the connecting plate (12). The threaded ring (18) is set inside the load-bearing plate (16), the outer surface of the threaded rod (19) is threadedly connected to the threaded ring (18), and one end of the threaded rod (19) is fixedly connected to the output end of the power motor (10). A guide shaft (17) is inserted inside the load-bearing plate (16), and the end of the guide shaft (17) is fixedly connected to the inner wall of the movable groove (8).

5. The cast iron casting sand box with edge venting strips and no cold-feather casting as described in claim 1, characterized in that: The base plate (1) is symmetrically provided with calibration shafts (27) corresponding to the guide ring (25), and the calibration shafts (27) pass through the inside of the guide ring (25).

6. The cast iron casting sand box with edge venting strips and no cold-feather casting as described in claim 5, characterized in that: The positioning mechanism includes a locking block (30), a protective box (32), and an adjustment component. The locking block (30) is symmetrically arranged inside the bar box (28), and the locking block (30) engages with the locking slot (26). The protective box (32) is fixed inside the bar box (28), and the adjustment component for adjusting the movement of the locking block (30) is arranged inside the bar box (28).

7. The cast iron casting sand box with edge venting strips and no cold-feather casting as described in claim 6, characterized in that: The adjustment assembly includes a dual-output shaft motor (33), a power rod (34), and a threaded screw (35). The dual-output shaft motor (33) is fixed inside the protective box (32). The power rod (34) is rotatably installed inside the protective box (32). The outer surface of the threaded screw (35) is threadedly connected to the inside of the locking block (30), and one end of the threaded screw (35) is fixedly connected to the end of the power rod (34). A shaft (31) is fixedly installed inside the strip box (28), and the shaft (31) penetrates the inside of the locking block (30).

8. The cast iron casting sand box with edge venting strips and no cold-feather casting as described in claim 7, characterized in that: The calibration shaft (27) has a positioning groove (36) on its side, and a frame (37) is symmetrically arranged on the limiting plate (24). The frame (37) is located on one side of the slot (26). A connecting groove (38) is provided inside the frame (37), and the connecting groove (38) is connected to the slot (26). A conical block (39) passes through the inside of the connecting groove (38). A sliding plate (40) is provided inside the frame (37), and the sliding plate (40) is fixedly connected to one end of the conical block (39). A reset rod (41) is arranged in an array inside the frame (37), and the reset rod (41) passes through the sliding plate (40). A reset spring (42) is arranged around the reset rod (41), and the end of the reset spring (42) is fixedly connected to the frame (37) and the sliding plate (40) respectively. A groove (43) is provided inside the limiting plate (24), and the end of the groove (43) is connected to the inside of the guide ring (25). The groove (43) is connected to the inside of the frame (37). A driving block (44) is provided inside the groove (43), and the driving block (44) is fixedly connected to the sliding plate (40). A positioning block (45) is fixedly connected to one end of the driving block (44), and the other end of the positioning block (45) extends into the positioning groove (36).

9. The cast iron casting sand box with edge venting strips and no cold-feather casting as described in claim 1, characterized in that: The driving mechanism includes a square groove (48), a driving plate (50), a support plate (51), and an adjusting screw (52). The square groove (48) is symmetrically arranged on the base frame (46). The driving plate (50) passes through the square groove (48), and the bottom end of the driving plate (50) extends into the base frame (46). The support plate (51) is fixed to the top of the driving plate (50), and the support plate (51) is located below the hook (4). The adjusting screw (52) is rotatably arranged inside the base frame (46), and the outer surface of the adjusting screw (52) is flush with the inner surface of the driving plate (50). The square groove (48) is fixedly provided with an electromagnet (49) on its side. A limit rod (53) is fixedly provided in the base frame (46) and the limit rod (53) passes through the drive plate (50). A reducer (54) is fixedly provided in the base frame (46). A drive motor (55) is fixedly installed on the reducer (54) and the output end of the drive motor (55) is fixedly connected to the input end of the reducer (54). Both the reducer (54) and the adjusting screw (52) are provided with transmission wheels (56) and the transmission wheels (56) are connected by belt drive.

10. A method of using a cast iron casting sand box with edge venting strips and no cold-feathering, applicable to the cast iron casting sand box with edge venting strips and no cold-feathering as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. After the upper mold (21) and the lower mold (23) are connected and closed, and the upper casting sand box (3) and the lower casting sand box (2) are fixedly connected, the scrap steel raw material is melted into casting iron from the outside. The molten iron is then easily introduced into the upper mold (21) and the lower mold (23) through the cooperation of the casting pipe (5) and the connecting pipe (22). S2. After the molten iron fills the cavity, it is cooled down by a cooling device, thereby forming the workpiece and realizing the casting of the workpiece. S3. The exhaust strip body (7) added to the edge of the upper casting sand box (3) discharges the water vapor generated by the evaporation of water in the sand box due to heat.

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