Controllable self-exhaust precoated sand hot core box
By designing a controllable self-exhaust structure in the coated sand hot core box, including components such as jet pipes, sealed pipe heads and telescopic rods, the problems of heat loss and blockage of the barrier in the traditional hot core box are solved, and more efficient sand core processing and exhaust effects are achieved.
Patent Information
- Application Number
- CN202510266272.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2025-05-30
AI Technical Summary
During the sand core processing process of traditional coated sand hot core boxes, the exhaust port is not sealed, which leads to heat loss, affecting the processing effect; and the barrier net is easily blocked, affecting the exhaust effect.
A controlled self-exhaustrated coated sand hot core box is designed, using a combination of jet pipe and sealed pipe head. The sliding and pressing of the sealed pipe head is achieved through the cooperation of the threaded rod and the fixed block to ensure heat retention; at the same time, through the cooperation of the telescopic rod and the spring, the automatic exhaust covering of the barrier net is achieved, and the brushing mechanism is used to prevent the barrier net from being blocked.
It effectively reduces heat loss and improves the effect of sand core processing; at the same time, it ensures the smoothness of the barrier net, maintains a good exhaust effect, and avoids the problem of too low internal temperature of the hot core box.
Smart Images
Figure CN120055207A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of self-exhausting hot core boxes, and particularly to a coated sand hot core box with controllable self-exhausting. Background Art
[0002] The coated sand hot core box is a core-making technology widely used in the casting industry, especially excellent in producing sand cores with complex shapes. The coated sand hot core box technology means that in a core shooter, compressed air is used as the power to inject the coated sand into a core box heated to a certain temperature. After it is cured, a sand core with sufficient strength can be taken out from the core box. When the coated sand is heated, the resin coating the sand grains melts and rapidly transforms into an infusible three-dimensional structure under the action of a curing agent, thus enabling the coated sand to be cured and formed. The coated sand hot core box technology is suitable for producing various sand cores with complex shapes, such as cylinder head sand cores, micro-car engine block cores, aluminum castings of heat exchangers, etc.
[0003] In the prior art, during the sand core processing of a traditional coated sand hot core box, an exhaust port is usually directly provided on the hot core box to discharge excess gas. If the exhaust port is not sealed, it will cause heat loss inside, thus affecting the sand core processing effect. And a retaining net is provided on the traditional exhaust port to block the ejection of the coated sand, which will cause the coated sand to accumulate on the retaining net, resulting in the blockage of the retaining net and affecting the exhaust effect of the hot core box. For this reason, we propose a coated sand hot core box with controllable self-exhausting to solve the above problems. Summary of the Invention
[0004] The purpose of the present invention is to solve the disadvantages existing in the prior art, such as: directly opening an exhaust port on a traditional hot core box and covering it with a retaining net for exhaust, which easily causes a large temperature loss inside the hot core box and affects the processing effect, and the coated sand is prone to accumulate on the retaining net and affect the exhaust effect. And a coated sand hot core box with controllable self-exhausting is proposed.
[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0006] A controllable self-exhausting coated sand hot core box, comprising a heating furnace, wherein a heating groove is formed on the heating furnace, and a hot core box is fixedly placed in the heating groove. A jet pipe is communicated with one side side wall of the hot core box. One end of the jet pipe close to the hot core box is connected with a sealing pipe head. An opening corresponding to the sealing pipe head is formed on the side wall of the hot core box. A pressing mechanism corresponding thereto is arranged on the sealing pipe head. A core shooter is fixedly arranged on the side wall of the heating furnace. The end of the jet pipe far away from the hot core box is fixedly connected with the output end of the core shooter. One end of the jet pipe close to the sealing pipe head is arranged as a spring pipe. Two side plates are fixedly arranged on the heating furnace. A sand box is fixedly arranged on the two side plates. The sand box is communicated with the jet pipe through a sand injection pipe. An exhaust port is arranged on the side wall of the hot core box, and a self-exhausting mechanism corresponding thereto is arranged at the position of a retaining net at the exhaust port.
[0007] Preferably, the pressing mechanism includes a sliding rod fixedly arranged on the side wall of the sealing pipe head. The sliding rod is slidably arranged on the heating furnace. A fixed block is also fixedly arranged on the heating furnace. A threaded rod is rotatably arranged on the side wall of the sliding rod. The threaded rod rotatably penetrates through the fixed block. A threaded through hole corresponding to the threaded rod is formed on the fixed block. A turning handle is fixedly arranged at the end of the threaded rod far away from the sliding rod.
[0008] Preferably, the self-exhausting mechanism includes a sealing cover slidably arranged on the side wall of the hot core box through two telescopic rods. The sealing cover covers the retaining net. Two telescopic slots corresponding to the telescopic rods are symmetrically formed on the side wall of the hot core box. The two telescopic rods are slidably arranged in the two telescopic slots. The two telescopic rods are respectively connected with the inner walls of the two telescopic slots through springs. A brushing mechanism corresponding to the retaining net is arranged on the heating furnace.
[0009] Preferably, the brushing mechanism includes two brushing plates. Two grooves corresponding to the brushing plates are formed on the side wall of the sealing cover close to the brushing plates. A sliding plate is slidably arranged on the heating furnace. The sliding plate is slidably arranged on the heating furnace through two sliding rods. The two brushing plates are fixedly arranged on the sliding plate. The two brushing plates are attached to the retaining net. A pushing mechanism corresponding to the sliding plate is arranged on the heating furnace.
[0010] Preferably, the pushing mechanism includes a runner. A rotating rod is rotatably arranged on the heating furnace. The runner is fixedly arranged on the rotating rod. The runner is arranged below the sliding plate. A transmission groove corresponding to the runner is formed on the lower wall of the sliding plate. A semi-circle of teeth is circumferentially fixedly arranged on the side wall of the runner. Tooth grooves corresponding to the teeth are formed on both side walls of the transmission groove. The runner is rotatably arranged in the transmission groove. A transmission mechanism corresponding to the rotating rod is also arranged on the heating furnace.
[0011] Preferably, the transmission mechanism includes a transmission gear, which is rotatably arranged on the heating furnace, a connecting plate is fixedly arranged on the side wall of the sealing cover, a connecting rod is fixedly arranged on the lower wall of the connecting plate, and a tooth plate is connected to the end of the connecting rod away from the connecting plate, the tooth plate is meshed with the transmission gear, and the transmission gear is connected to the rotating rod through a transmission belt.
[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the cooperation of the sliding rod is achieved through the cooperation between the threaded rod and the fixed block, and the sealing pipe head can be driven to slide by rotating the threaded rod, thereby being able to drive the sealing pipe head to be pressed tightly against the hot core box, and the sealing pipe head can also be quickly slid out for convenient replacement of the hot core box, and the sand box is added into the air jet pipe through the cooperation between the sand box and the sand injection pipe, and then the sand is sprayed into the air jet pipe by the core shooting machine to realize the operation of sandblasting into the hot core box, and the cooperation between the telescopic rod and the spring, when the air pressure in the hot core box is high, the sealing cover will be pushed outward, that is, the telescopic rod will slide out of the telescopic groove, and the air outlet covered by the baffle can be opened for exhaust operation, and in the process of opening the sealing cover, the connecting plate will be driven to The outer side slides and can drive the tooth plate to slide through the connection of the connecting rod. By setting the tooth plate to mesh with the transmission gear, the transmission gear can be driven to rotate when the tooth plate slides. The transmission belt can drive the rotating rod to rotate. The rotating rod drives the rotating wheel to rotate in the transmission groove, which can drive the slide plate to slide back and forth, and then drive the brush plate to slide back and forth on the baffle net to brush the baffle net, thereby avoiding the problem of blockage of the baffle net caused by the accumulation of coated sand on the baffle net, and ensuring the exhaust effect of the baffle net. After the gas is discharged, the spring pulls the sealing cover to reset, thereby driving the tooth plate to reset, and then allowing the brush plate to slide to the groove of the sealing cover to complete the sealing reset operation of the sealing cover, which is convenient for the next automatic exhaust operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 A schematic diagram of the three-dimensional structure of a controllable self-exhausting coated sand hot core box proposed by the present invention;
[0014] Figure 2 A schematic diagram of the side structure of a controllable self-exhausting coated sand hot core box proposed by the present invention;
[0015] Figure 3 This is a schematic diagram of the other side structure of a controllable self-exhausting coated sand hot core box proposed by the present invention;
[0016] Figure 4 for Figure 3 The structural diagram at A in the middle;
[0017] Figure 5 It is a schematic diagram of the structure of the lower side of the skateboard.
[0018] In the figure: 1 heating furnace, 2 hot core box, 3 sealing pipe head, 4 air injection pipe, 5 sliding rod, 6 fixing block, 7 threaded rod, 8 transmission gear, 9 toothed plate, 10 side plate, 11 sand box, 12 sand injection pipe, 13 sealing cover, 14 brush plate, 15 connecting plate, 16 connecting rod, 17 sliding plate, 18 sliding rod, 19 rotating wheel, 20 rotating rod, 21 transmission belt, 22 core shooter, 23 transmission groove, 24 retaining net, 25 telescopic rod, 26 telescopic groove, 27 spring. Detailed implementation manner
[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.
[0020] Refer to Figures 1-5, A controllable self-exhausting coated sand hot core box, comprising a heating furnace 1 with a heating groove formed thereon, and a hot core box 2 fixedly placed in the heating groove. A jet pipe 4 is communicatively provided on one side wall of the hot core box 2. One end of the jet pipe 4 close to the hot core box 2 is connected with a sealing pipe head 3. An opening corresponding to the sealing pipe head 3 is formed on the side wall of the hot core box 2, and a corresponding pressing mechanism is provided on the sealing pipe head 3. The pressing mechanism includes a sliding rod 5 fixedly arranged on the side wall of the sealing pipe head 3, and the sliding rod 5 is slidably arranged on the heating furnace 1. A fixing block 6 is also fixedly arranged on the heating furnace 1. A threaded rod 7 is rotatably arranged on the side wall of the sliding rod 5, and the threaded rod 7 rotatably penetrates through the fixing block 6. A threaded through hole corresponding to the threaded rod 7 is formed on the fixing block 6. A turning handle is fixedly arranged at one end of the threaded rod 7 away from the sliding rod 5. A core shooter 22 is fixedly arranged on the side wall of the heating furnace 1. One end of the jet pipe 4 away from the hot core box 2 is fixedly connected with the output end of the core shooter 22. One end of the jet pipe 4 close to the sealing pipe head 3 is arranged as a flexible pipe. Two side plates 10 are fixedly arranged on the heating furnace 1, and a sand box 11 is fixedly arranged on the two side plates 10. The sand box 11 is communicatively connected with the jet pipe 4 through a sand injection pipe 12. An exhaust port is provided on the side wall of the hot core box 2, and a corresponding self-exhausting mechanism is provided at the exhaust port. The self-exhausting mechanism includes a sealing cover 13 slidably arranged on the side wall of the hot core box 2 through two telescopic rods 25, and the sealing cover 13 covers the retaining net 24. Two telescopic slots 26 corresponding to the telescopic rods 25 are symmetrically formed on the side wall of the hot core box 2. The two telescopic rods 25 are slidably arranged in the two telescopic slots 26, and the two telescopic rods 25 are respectively connected with the inner walls of the two telescopic slots 26 through springs 27. A brushing mechanism corresponding to the retaining net 24 is provided on the heating furnace 1. The brushing mechanism includes two brush plates 14. Two grooves corresponding to the brush plates 14 are formed on the side wall of the sealing cover 13 close to the brush plates 14. A sliding plate 17 is slidably arranged on the heating furnace 1. The sliding plate 17 is slidably arranged on the heating furnace 1 through two sliding rods 18. The two brush plates 14 are fixedly arranged on the sliding plate 17, and the two brush plates 14 are attached to the retaining net 24. A pushing mechanism corresponding to the sliding plate 17 is provided on the heating furnace 1. The pushing mechanism includes a runner 19. A rotating rod 20 is rotatably arranged on the heating furnace 1. The runner 19 is fixedly arranged on the rotating rod 20, and the runner 19 is arranged below the sliding plate 17. A transmission groove 23 corresponding to the runner 19 is formed on the lower wall of the sliding plate 17. A semi-circle of teeth is circumferentially fixedly arranged on the side wall of the runner 19. Tooth grooves corresponding to the teeth are formed on both side walls of the transmission groove 23. The runner 19 is rotatably arranged in the transmission groove 23. A transmission mechanism corresponding to the rotating rod 20 is also provided on the heating furnace 1. The transmission mechanism includes a transmission gear 8 rotatably arranged on the heating furnace 1. A connecting plate 15 is fixedly arranged on the side wall of the sealing cover 13. A connecting rod 16 is fixedly arranged on the lower wall of the connecting plate 15. One end of the connecting rod 16 away from the connecting plate 15 is connected with a toothed plate 9, and the toothed plate 9 is meshed with the transmission gear 8.The transmission gear 8 is drivingly connected to the rotating rod 20 through the transmission belt 21. Through the cooperation of the threaded rod 7 and the fixed block 6, the cooperation with the sliding rod 5 is realized. By rotating the threaded rod 7, the sealing pipe head 3 can be driven to slide, and then the sealing pipe head 3 can be driven to tightly press on the hot core box 2. It is also possible to quickly slide out the sealing pipe head 3 to facilitate the replacement of the hot core box 2. Through the cooperation of the sand box 11 and the sand injection pipe 12, sand is added into the air injection pipe 4, and then the core shooter 22 injects air into the air injection pipe 4 to realize the operation of sandblasting into the hot core box 2. Through the cooperation of the telescopic rod 25 and the spring 27, when the air pressure in the hot core box 2 is relatively high, it will push the sealing cover 13 outwards, that is, the telescopic rod 25 slides out of the telescopic groove 26, and the air outlet covered by the retaining net 24 can be opened for exhaust operation. During the opening process of the sealing cover 13, the connecting plate 15 will be driven to slide outwards. Through the connection of the connecting rod 16, the toothed plate 9 can be driven to slide. By setting the toothed plate 9 to mesh with the transmission gear 8, when the toothed plate 9 slides, the transmission gear 8 can be driven to rotate. Through the transmission of the transmission belt 21, the rotating rod 20 can be driven to rotate. The rotating rod 20 drives the rotating wheel 19 to rotate in the transmission groove 23, and then the sliding plate 17 can be driven to slide reciprocally, and further drive the brush plate 14 to slide reciprocally on the retaining net 24 to brush the retaining net 24, avoiding the problem of blockage of the retaining net 24 caused by the accumulation of coated sand on the retaining net 24, and ensuring the exhaust effect of the retaining net 24. After the gas is discharged, the spring 27 pulls the sealing cover 13 to reset, thereby driving the toothed plate 9 to reset, and then making the brush plate 14 slide to the groove of the sealing cover 13 to complete the sealing reset operation of the sealing cover 13, facilitating the next automatic exhaust operation.,
[0021] In the present invention, through the cooperation of the threaded rod 7 and the fixed block 6, the cooperation with the sliding rod 5 is realized. By rotating the threaded rod 7, the sealing pipe head 3 can be driven to slide, so as to drive the sealing pipe head 3 to tightly press on the hot core box 2. It is also possible to quickly slide out the sealing pipe head 3 to facilitate the replacement of the hot core box 2. Through the cooperation of the sand box 11 and the sand injection pipe 12, sand is added into the air injection pipe 4. Then, by injecting air into the air injection pipe 4 through the core shooter 22, the operation of sandblasting into the hot core box 2 is realized. Through the cooperation of the telescopic rod 25 and the spring 27, when the air pressure in the hot core box 2 is relatively high, it will push the sealing cover 13 outwards, that is, the telescopic rod 25 slides out of the telescopic groove 26, and the air outlet covered by the retaining net 24 can be opened for exhaust operation. During the opening process of the sealing cover 13, the connecting plate 15 will be driven to slide outwards. Through the connection of the connecting rod 16, the toothed plate 9 can be driven to slide. By setting the toothed plate 9 to mesh with the transmission gear 8, when the toothed plate 9 slides, the transmission gear 8 can be driven to rotate. Through the transmission of the transmission belt 21, the rotating rod 20 can be driven to rotate. The rotating rod 20 drives the rotating wheel 19 to rotate in the transmission groove 23, so as to drive the sliding plate 17 to slide reciprocally, and then drive the brush plate 14 to slide reciprocally on the retaining net 24 to brush the retaining net 24, avoiding the problem that the coated sand accumulates on the retaining net 24 and causes the blockage of the retaining net 24, ensuring the exhaust effect of the retaining net 24. After the gas is discharged, the spring 27 pulls the sealing cover 13 to reset, thereby driving the toothed plate 9 to reset, and then making the brush plate 14 slide to the groove of the sealing cover 13 to complete the sealing reset operation of the sealing cover 13, facilitating the next automatic exhaust operation.
[0022] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent replacements or changes, and all should be covered within the protection scope of the present invention.
Claims
1. A controllable self-exhausting coated sand hot core box, comprising a heating furnace (1), characterized in that: The heating furnace (1) is provided with a heating groove, and a hot core box (2) is fixedly placed in the heating groove. A jet pipe (4) is connected to a side wall of the hot core box (2). A sealing pipe head (3) is connected to one end of the jet pipe (4) close to the hot core box (2). An opening corresponding to the sealing pipe head (3) is provided on the side wall of the hot core box (2). A corresponding pressing mechanism is provided on the sealing pipe head (3). A core shooting machine (22) is fixedly provided on the side wall of the heating furnace (1). The jet pipe (4) The end away from the hot core box (2) is fixedly connected to the output end of the core shooting machine (22); the end of the air injection pipe (4) close to the sealing pipe head (3) is arranged in the form of a spring tube; two side plates (10) are fixedly arranged on the heating furnace (1); a sand box (11) is fixedly arranged on the two side plates (10); the sand box (11) is connected to the air injection pipe (4) through a sand injection pipe (12); an exhaust port is arranged on the side wall of the hot core box (2); a baffle (24) is arranged at the exhaust port; and a corresponding self-exhaust mechanism is arranged at the exhaust port.
2. The controllable self-exhausting coated sand hot core box according to claim 1, characterized in that: The clamping mechanism comprises a sliding rod (5), the sliding rod (5) being fixedly arranged on the side wall of the sealing pipe head (3), and the sliding rod (5) being slidably arranged on the heating furnace (1), and a fixing block (6) being fixedly arranged on the heating furnace (1), a threaded rod (7) being rotatably arranged on the side wall of the sliding rod (5), the threaded rod (7) being rotatably arranged to penetrate the fixing block (6), a threaded through hole corresponding to the threaded rod (7) being opened on the fixing block (6), and a rotating handle being fixedly arranged on one end of the threaded rod (7) away from the sliding rod (5).
3. The controllable self-exhausting coated sand hot core box according to claim 1, characterized in that: The self-exhaust mechanism comprises a sealing cover (13), the sealing cover (13) is slidably arranged on the side wall of the hot core box (2) through two telescopic rods (25), and the sealing cover (13) covers the baffle (24), two telescopic grooves (26) corresponding to the telescopic rods (25) are symmetrically arranged on the side wall of the hot core box (2), the two telescopic rods (25) are slidably arranged in the two telescopic grooves (26), and the two telescopic rods (25) are respectively connected to the inner walls of the two telescopic grooves (26) through springs (27), and the heating furnace (1) is provided with a brushing mechanism corresponding to the baffle (24).
4. The controllable self-exhausting coated sand hot core box according to claim 3, characterized in that: The brushing mechanism comprises two brush plates (14); two grooves corresponding to the brush plates (14) are provided on a side wall of the sealing cover (13) close to the brush plates (14); a slide plate (17) is slidably arranged on the heating furnace (1); the slide plate (17) is slidably arranged on the heating furnace (1) through two slide rods (18); the two brush plates (14) are fixedly arranged on the slide plate (17), and the two brush plates (14) are arranged in contact with the baffle (24); and a pushing mechanism corresponding to the slide plate (17) is provided on the heating furnace (1).
5. The controllable self-exhausting coated sand hot core box according to claim 4, characterized in that: The pushing mechanism comprises a rotating wheel (19), a rotating rod (20) is rotatably arranged on the heating furnace (1), the rotating wheel (19) is fixedly arranged on the rotating rod (20), the rotating wheel (19) is arranged at the lower side of the slide plate (17), a transmission groove (23) corresponding to the rotating wheel (19) is provided on the lower wall of the slide plate (17), a half circle of latching teeth are fixedly arranged circumferentially on the side wall of the rotating wheel (19), latching tooth grooves corresponding to the latching teeth are provided on both side walls of the transmission groove (23), the rotating wheel (19) is rotatably arranged in the transmission groove (23), and a transmission mechanism corresponding to the rotating rod (20) is also provided on the heating furnace (1).
6. The controllable self-exhausting coated sand hot core box according to claim 5, characterized in that: The transmission mechanism comprises a transmission gear (8), the transmission gear (8) is rotatably arranged on the heating furnace (1), a connecting plate (15) is fixedly arranged on the side wall of the sealing cover (13), a connecting rod (16) is fixedly arranged on the lower wall of the connecting plate (15), and a latching plate (9) is connected to the end of the connecting rod (16) away from the connecting plate (15), the latching plate (9) is meshed with the transmission gear (8), and the transmission gear (8) is transmission-connected to the rotating rod (20) via a transmission belt (21).