Core making equipment for casting sand core and using method

Abstract

The invention relates to the technical field of precoated sand core making, and provides core making equipment for casting a sand core and a use method.The core making equipment comprises a rack and two sets of mold assemblies symmetrically installed on the rack, a supporting frame is installed on the rear portion of the rack, and two sets of sand shooting devices are symmetrically arranged on the supporting frame; a regulation and control part for driving the sand shooting device to move and lift is arranged on the support frame; a sand surrounding and cleaning assembly is arranged at the front end of the sand shooting device and is connected with an edge sand blowing assembly arranged at the top of the supporting frame; the sand surrounding and cleaning assembly comprises an assembling table arranged at the front end of the sand shooting device and an arc-shaped gathering fence which slides at the bottom of the assembling table and can pop out downwards. When the sand shooting device is used, the arc-shaped polymerization cleaning structure is integrated at the front end of the sand shooting device, a dynamic physical encirclement ring is formed on the mold closing top surface of a mold when the sand shooting device works, and on-line, automatic and guiding type cleaning of residual coated sand on the upper surface of the mold after sand shooting is achieved on a vertical parting core shooting machine.

Description

Technical Field

[0001] This invention relates to the field of coated sand core making technology, and more specifically, to a core making device and method for casting sand cores. Background Technology

[0002] Coated sand core making is a key process in intelligent casting production. It uses coated sand with thermoplastic phenolic resin and latent curing agent on the surface of quartz sand as raw material. The resin is melted and cross-linked by heating, and the sand particles are solidified into high-strength and high-precision sand cores.

[0003] The coated sand core shooting machine is the core equipment for automating the above-mentioned process. Its working principle is to use compressed air to inject loose coated sand into the preheated core box (mold) cavity at high speed. The sand particles fill and compact in a short time, and then solidify and form under the continuous heating of the core box. Finally, the finished sand core is ejected by the mold opening mechanism. Among them, the dual-station core making equipment with vertical parting and top sand shooting is widely used. It performs sand shooting operation by pressing the sand shooting head down and sealing it with the upper surface of the mold.

[0004] However, in the operation of the aforementioned open-type core shooter with a pressure injection structure, when the sand shooting head is lifted after sand shooting, a layer of residual coated sand remains on the upper surface of the mold. Currently, this is mainly cleaned manually or with an air gun, but this can easily cause sand particles to be blown into the moving parts of the equipment or the gaps in the mold, aggravating wear and causing potential failures. More seriously, if the residual sand is not completely removed, it will directly contaminate the mold cavity or adhere to the surface of the subsequently heated forming sand core, resulting in defects in the appearance of the sand core and affecting the quality of the final casting. Therefore, this offline operation mode, which relies on manual intervention, is difficult to coordinate with the continuous, stable, and efficient automated production cycle required by the intelligent casting island, thus restricting the overall production efficiency.

[0005] Therefore, this application proposes a core-making device and a method for using casting sand cores to solve the above problems. Summary of the Invention

[0006] Technical problem to be solved: In view of the problems existing in the prior art, the purpose of this invention is to provide a core-making equipment and method for casting sand cores, which solves the problems of low cleaning efficiency, easy equipment wear and secondary pollution of sand cores when relying on manual cleaning of residual sand on the upper surface of the mold after sand shooting in existing core shooting machines.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a core-making device for casting sand cores, comprising a frame and two sets of mold assemblies symmetrically mounted on the frame. A support frame is installed at the rear of the frame, and two sets of sand ejectors are symmetrically arranged on the support frame. The support frame is provided with a control component for driving the sand ejectors to move and rise. A sand-cleaning assembly is provided at the front end of the sand ejector, and the sand-cleaning assembly is connected to an edge sand-blowing assembly located at the top of the support frame. The sand-cleaning assembly includes: a mounting platform placed at the front end of the sand ejector and an arc-shaped aggregate fence that slides on the bottom of the mounting platform and can pop downward. Edge sand-gathering plates are symmetrically installed on both sides of the arc-shaped aggregate fence, and multiple partition plates are installed circumferentially at intervals in the middle of the arc-shaped aggregate fence. During operation, the arc-shaped aggregate fence pops downward and abuts against the mold closing top surface of the mold assembly when the sand ejector rises. Then, when the sand ejector moves backward and resets, it encloses, guides, gathers, and cleans the residual sand on the mold closing top surface.

[0008] In a new embodiment, the assembly platform is equipped with a spring-loaded component that drives the arc-shaped polymer fence to rebound. The spring-loaded component includes an outer column groove and an inner sleeve column. The top two sides of the assembly platform are equipped with outer column grooves, and the inner sleeve column slides in the outer column grooves. The top of the inner sleeve column is connected to the top wall of the outer column groove through a return spring, and the bottom of the inner sleeve column is fixedly connected to the top two sides of the arc-shaped polymer fence. The outer walls of the opposite sides of the outer column groove and the inner sleeve column are respectively provided with mutually cooperating slots and ball-holding grooves. The slots are opened at the lower part of the outer column grooves, and the ball-holding grooves are opened at the upper part of the inner sleeve columns. When the inner sleeve column is in the pop-out state, the ball-holding grooves correspond to the slots in height.

[0009] In a new embodiment, the fitting platform is further provided with a locking assembly, which includes: a horizontal rod, which is horizontally installed on the top of the fitting platform; two spring locking rods, which slide symmetrically on the left and right sides of the horizontal rod; and a spherical end, which is fixedly installed on the outer end of the spring locking rod, the spherical end passing through the slot on the outer column groove and engaging in the ball-holding groove on the inner sleeve column.

[0010] In a new embodiment, a high-temperature resistant contact plate is installed at the bottom of the arc-shaped polymer fence; the lower part of the inner wall of the arc-shaped polymer fence is provided with wall teeth arranged along its arc, which are used to scrape the residual sand on the top surface of the mold.

[0011] In a new embodiment, the edge sand blowing assembly includes: an air supply pump installed at the top of a support frame; an assembly frame fixedly installed on the lower outer side of the sand ejector, with its front end fixedly connected to a mounting platform, and a top cover installed on the top of the mounting platform; a built-in U-shaped tube embedded inside the assembly frame, one end of which is connected to the air outlet of the air supply pump via a pipeline, and the other end connected to the air inlet of a telescopic air pipe located in the inner cavity of the top wall of the mounting platform; an inclined air guide port is installed on the inner wall of the edge sand gathering plate, and the edge sand gathering plate is connected to the exhaust end of the telescopic air pipe; during operation, the airflow generated by the air supply pump is guided into the edge sand gathering plate through the built-in U-shaped tube and the telescopic air pipe, and then discharged through the inclined air guide port, assisting in pushing the edge sand particles towards the center of the cleaning structure.

[0012] In a new embodiment, a collection assembly is provided at the rear of the frame. The collection assembly includes: a hydraulic rod installed on the top rear side of the frame; a flat plate installed on the telescopic end of the hydraulic rod; and two collection troughs, which are respectively installed on the top two sides of the flat plate. During operation, the hydraulic rod drives the flat plate and the collection troughs to move horizontally upward, so that the collection troughs are located below the discharge port of the arc-shaped polymer fence to receive and clean residual sand.

[0013] In a new embodiment, the control component includes: an electric slide rail frame, installed on the left and right sides of the top wall of the support frame; a horizontal moving seat, sliding within the electric slide rail frame, and an elastic lifting seat sliding within the horizontal moving seat, with a sand ejector installed at the bottom of the elastic lifting seat; the sand ejector is connected to a sand supply box on the rear side of the top of the support frame via a pipeline; and a push cylinder, installed on the left and right sides of the front top of the support frame.

[0014] In a new embodiment, the mold assembly includes: a guide rail frame, mounted on both sides of the top of the frame; a stationary mold, fixedly mounted on one side of the guide rail frame; and a moving mold, sliding on the other side of the guide rail frame, and the moving mold is pushed by a mold-closing cylinder fixed on the same side of the guide rail frame; when the stationary mold and the moving mold are in the mold-closing state, their common upper surface constitutes the mold-closing top surface.

[0015] A method of using a core-making device for casting sand cores includes the following steps: S1. First, the sand ejector is driven by the control component to move above the mold closing top surface of the mold assembly to complete the sand injection, and then the sand ejector is lifted vertically. S2. During the lifting process of the sand ejector, the arc-shaped polymer fence is not pressed by the mold, and thus pops out from the bottom of the assembly table. Its bottom is in close contact with the top surface of the mold, thereby forming an arc-shaped surrounding cleaning structure in advance on the leading edge of the upper surface of the mold in the mold-closed state. At the same time, the spring-loaded component and the locking component work together to lock the arc-shaped polymer fence firmly in the pop-out position. S3. The control component drives the sand ejector to move horizontally backward, causing the front mounting platform and the locked arc-shaped polymer fence to move backward along the top surface of the mold. During this process, the arc-shaped polymer fence scrapes off the residual sand through the toothed section at its bottom, and the spaced partition plates on it separate and guide the sand flow. At the same time, the edge sand blowing component is activated, and the airflow is ejected through the inclined air guide ports symmetrically installed on the inner wall of the edge sand gathering plates on both sides of the fence, which directionally blows the residual sand on both sides of the upper surface of the mold, causing it to gather in the middle of the cleaning structure. Thus, the mechanical scraping, sand flow separation and pneumatic guidance work together to efficiently gather, surround and guide the residual sand to the preset discharge port. S4. The collecting component collects the residual sand falling from the discharge port. Then the locking component is unlocked, and the arc-shaped polymer fence retracts and resets under the action of the spring-loaded component. All components return to the standby state.

[0016] Beneficial effects: Compared with the prior art, the advantages of this invention are: 1. This application integrates an arc-shaped polymerization cleaning structure at the front end of the sand ejector. When working, it forms a dynamic physical enclosure on the top surface of the mold closing mechanism. On a vertical parting core shooting machine, it realizes online, automatic, and guided cleaning of residual sand coating on the upper surface of the mold after sand shooting. This helps to reduce equipment wear and failure caused by manual sand coating removal. Moreover, the cleaning process is seamlessly integrated into the production cycle, realizing fully automatic continuous operation and meeting the core requirements of intelligent casting islands for efficient and stable production.

[0017] 2. By setting up an arc-shaped aggregate fence, the lower part of the inner wall of the arc-shaped aggregate fence has wall teeth that are continuously arranged along its arc. During the scraping process, a continuous cutting edge is formed, which can effectively break and peel off the heated and hardened sand layer. The partition plates installed at intervals on the fence can divide and guide the scraped sand flow to prevent accumulation. Combined with the symmetrically set edge sand-gathering plates, the sand flow is constrained from both sides and guided to gather in the middle. The above structure together constitutes a physical cleaning channel with scraping, guiding and gathering functions. A layer of residual coated sand will remain on the upper surface of the cleaning mold.

[0018] 3. By setting a locking component, when the arc-shaped polymer fence pops out to the working position, the spherical end in the locking component is automatically locked into the ball groove of the inner sleeve column under the spring force compression and rebound. This ensures that the arc-shaped polymer fence maintains stable and tight contact with the mold surface during dynamic scraping operations, preventing loosening or tilting under the scraping reaction force and ensuring stable cleaning results.

[0019] 4. By utilizing the control component as the driving source of the sand ejector, and using its movement trajectory as the original power for the cleaning structure's action, the deployment and scraping action of this cleaning structure are entirely triggered and driven by the inherent lifting and backward movement of the sand ejector. No additional power unit or independent operation time is required, thus realizing the low-cost adaptation and integration of the cleaning function into the existing production process. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This is a front view of the present invention.

[0022] Figure 3 This is a schematic diagram of the location structure of the collection component of the present invention.

[0023] Figure 4 This is a schematic diagram of the control component structure of the present invention.

[0024] Figure 5 This is a schematic diagram of the assembly structure of the sand ejector, the surrounding sand cleaning component, and the edge blowing sand component of the present invention.

[0025] Figure 6 This is a schematic diagram of the horizontal moving seat position structure of the present invention.

[0026] Figure 7 This is a schematic diagram of the location structure of the built-in U-shaped tube of the present invention.

[0027] Figure 8 This is a schematic diagram of the arc-shaped polymer fence structure of the present invention.

[0028] Figure 9 This is a schematic diagram of the spring-loaded assembly structure of the present invention.

[0029] Figure 10 This is a schematic diagram of the telescopic air tube position structure of the present invention.

[0030] Figure 11 This is a schematic diagram of the edge sandblasting assembly structure of the present invention.

[0031] Figure 12 This is a schematic diagram of the position structure of the slot and ball-holding groove of the present invention.

[0032] Figure 13 This is a schematic diagram of the air blowing direction of the edge sand-gathering plate of the present invention.

[0033] The attached diagram is labeled as follows: 1. Frame; 2. Mold assembly; 21. Guide rail frame; 22. Static mold; 23. Moving mold; 3. Support frame; 4. Sand ejector; 5. Control components; 51. Electric slide rail; 52. Horizontal moving seat; 53. Pushing cylinder; 6. Sand-clearing and cleaning components; 61. Assembly platform; 62. Arc-shaped polymer fence; 621. High-temperature resistant contact base plate; 622. Wall tooth section; 63. Edge sand-reinforcing plate; 64. Divider panel; 7. Edge sandblasting assembly; 71. Air supply pump; 72. Assembly frame; 73. Built-in U-shaped tube; 74. Telescopic air tube; 75. Angled air guide port; 8. Spring-loaded assembly; 81. External column groove; 811. Groove; 82. Inner sleeve column; 821. Ball retaining groove; 83. Return spring; 9. Locking assembly; 91. Horizontal bar; 92. Spring locking bar; 93. Spherical end; 10. Collection component; 101. Hydraulic rod; 102. Flat plate; 103. Collection trough. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0035] This application provides a core-making device and method for casting sand cores, which solves the problems of low cleaning efficiency, easy equipment wear and secondary pollution of sand cores when relying on manual cleaning of residual sand on the upper surface of the mold after sand shooting in existing core shooting machines. In use, by integrating an arc-shaped polymer cleaning structure at the front end of the sand shooter, a dynamic guiding cleaning boundary is formed on the top surface of the mold during operation, realizing online and automatic cleaning of residual sand on the upper surface of the mold after sand shooting on a vertical parting core shooting machine.

[0036] The technical solutions in this application are intended to solve the above-mentioned technical problems, and the overall approach is as follows.

[0037] Example 1, please refer to Figures 1-13This application provides a core-making device for casting sand cores, including a frame 1, two sets of mold assemblies 2 symmetrically installed on the frame 1, a support frame 3 installed at the rear of the frame 1, and two sets of sand ejectors 4 symmetrically arranged on the support frame 3. The support frame 3 is provided with a control component 5 for driving the sand ejectors 4 to move and rise and fall. A sand cleaning component 6 is provided at the front end of the sand ejector 4, and the sand cleaning component 6 is connected to an edge sand blowing component 7 located at the top of the support frame 3. The sand cleaning component 6 includes: a mounting platform 61 placed at the front end of the sand ejector 4 and an arc-shaped aggregate fence 62 that slides on the bottom of the mounting platform 61 and can pop down. Edge sand gathering plates 63 are symmetrically installed on both sides of the arc-shaped aggregate fence 62, and multiple partition plates 64 are installed circumferentially in the middle of the arc-shaped aggregate fence 62. During operation, the arc-shaped aggregate fence 62 pops down and abuts against the mold closing top surface of the mold assembly 2 when the sand ejector 4 rises. Then, when the sand ejector 4 moves back to reset, it surrounds, guides, gathers and cleans the residual sand on the mold closing top surface.

[0038] Furthermore, the mold assembly 2 includes: a guide rail frame 21, which is installed on both sides of the top of the frame 1; a stationary mold 22, which is fixedly installed on one side of the guide rail frame 21; and a moving mold 23, which slides on the other side of the guide rail frame 21, and the moving mold 23 is pushed by a mold closing cylinder fixed on the same side of the guide rail frame 21; when the mold is closed, the common upper surface of the stationary mold 22 and the moving mold 23 constitutes the mold closing top surface.

[0039] In a preferred embodiment of this solution, the sand cleaning component 6, the edge blowing component 7, and the sand ejector 4 are integrated into a single design. The kinetic energy and spatial timing provided by the inherent descending, lifting, and backward movement of the sand ejector 4 are utilized. Specifically, the deployment, locking, scraping, and resetting actions of the cleaning structure are all driven and triggered by the regular movement of the sand ejector 4 after sand injection. There is no need to introduce additional time-consuming cleaning procedures. Instead, the cleaning function is seamlessly integrated into the existing production cycle. Thus, without interfering with the normal sand injection and solidification process, the automated treatment of residual sand on the mold closing top surface is achieved, which meets the requirements of intelligent casting islands for continuous, stable, and efficient production.

[0040] Specifically, the workflow of the core-making equipment for this casting sand core is as follows: First, driven by the mold-closing cylinder, the moving mold 23 moves along the guide rail 21 towards the stationary mold 22 until the two precisely fit together and achieve a sealed closure, forming a complete mold cavity. After mold closing, the sand injection port on the top surface of the mold is fully exposed, providing a channel for sand filling. Subsequently, the electric slide rail 51 of the control component 5 is activated, driving the horizontal moving seat 52 of the sliding assembly to move forward along the guide trajectory, thereby driving the sand ejector 4 connected to the horizontal moving seat 52 to move synchronously. When the sand injection port of the sand ejector 4 aligns with the... When the sand injection port on the top surface of the mold is precisely aligned, the electric slide rail 51 stops moving and completes the horizontal positioning. After the horizontal positioning is completed, the push cylinder 53 of the control component 5 is activated, pushing the elastic lifting seat in the horizontal moving seat 52 to move downward, thereby driving the sand ejector 4 to move vertically downward until the sand injection port of the sand ejector 4 is tightly covered with the sand injection port of the mold, achieving filling and sealing. Finally, the sand ejector 4 obtains sand through the connected sand supply box, starts high-pressure sand injection, and sprays sand into the inner cavity of the mold until the cavity is filled, thus completing the sand injection operation. After the sand ejector 4 is aligned and closed with the top surface of the mold, the arc-shaped polymer fence 62 is squeezed by the upper surface of the mold, which forces the inner sleeve column 82 to compress the return spring 83 and retract it upward, so that it is stored in the assembly table 61 to avoid interfering with the sand ejection operation and wait for the subsequent rising and cleaning operation to reset. Second, after the sand-shooting operation is completed, the push cylinder 53 retracts, and the elastic lifting seat in the horizontal moving seat 52 resets upward, driving the sand-shooter 4 to reset and rise vertically (the reset and rise height is a preset fixed value), so that the sand-shooter 4 completely separates from the mold closing top surface, making room for the cleaning structure deployment. During the lifting process of the sand ejector 4, the arc-shaped polymer fence 62 loses the pressing force of the mold and is deployed under the drive of the spring-loaded component 8. The inner sleeve column 82 of the spring-loaded component 8 slides down along the guide trajectory of the outer column groove 81, causing the arc-shaped polymer fence 62 to gradually pop out from the bottom of the mounting platform 61 until the high-temperature resistant contact bottom plate 621 at the bottom of the arc-shaped polymer fence 62 is in close contact with the top surface of the mold. At this time, the edge sand-collecting plates 63 symmetrically installed on both sides of the arc-shaped polymer fence 62 are simultaneously unfolded, and multiple partition plates 64 arranged at intervals along the arc-shaped polymer fence 62 are also in place, forming an arc-shaped enclosed physical cleaning boundary. At the same time, after the arc-shaped polymer fence 62 is in contact with the target, the spring locking rod 92 of the locking component 9 moves horizontally inward under the action of the spring force, so that the ball end 93 of the rod end passes through the slot 811 on the outer column groove 81 and is locked into the ball groove 821 on the inner sleeve column 82. The arc-shaped polymer fence 62 is firmly locked in the fully popped working position by the locking limit, ensuring that it remains stable in subsequent actions. Third, after the structure is cleared and locked, the control system first starts the electric slide rail frame 51 of the control component 5 to drive the sand ejector 4 to move horizontally backward to reset. Since the arc-shaped polymer fence 62 has been locked and fixed, it generates a backward scraping motion relative to the top surface of the mold. Specifically, the wall tooth section 622 at the bottom of the arc-shaped polymer fence 62 contacts the residual sand layer. The cutting force of the tooth structure loosens and breaks the hardened sand layer, realizing the initial separation of residual sand from the mold surface. Subsequently, the partition plate 64 divides the loose sand flow into multiple independent channels, guides the sand flow to move in an orderly manner, and avoids local accumulation and blockage. At the same time, the edge sand gathering plate 63 guides and constrains the scattered sand particles from both sides, guiding and gathering them towards the central area of ​​the annular cavity, preparing for subsequent centralized discharge. Simultaneously, during the operation of the arc-shaped polymer fence 62, the control system synchronously activates the edge sand blowing assembly 7 to provide assistance. The airflow generated by the air pump 71 is delivered to the edge sand-gathering plate 63 through the built-in U-shaped pipe 73 and the telescopic air pipe 74, and finally ejected from the inclined air guide port 75 on its inner wall with controlled and appropriate air pressure. This airflow forms a stable and concentrated centripetal airflow, which, under precise guidance and air pressure control, effectively assists the residual sand on both sides of the upper surface of the mold to move towards the center of the cleaning structure and gather, while avoiding sand particles from scattering or being blown away due to excessive airflow. The mechanical scraping and this directional and controlled airflow work together within the physical boundary formed by the arc-shaped polymer fence 62, the edge sand-gathering plate 63, and the partition plate 64 to efficiently peel off, steadily gather, and guide the residual sand to the preset discharge port. Fourth, when the residual sand is guided to the discharge port, the collection component 10 starts to operate. Its hydraulic rod 101 pushes the flat plate 102 and the collection box 103 mounted on it to rise horizontally, pushing the collection box 103 to the rear side of the mold (i.e. directly below the discharge port) to receive the residual sand falling under gravity, completing the fixed-point and closed-loop recycling of waste. After completing the above process, the molded sand core is taken out, thus completing the sand core casting operation under one process flow.

[0041] Please see Figures 9-12 The mounting platform 61 is equipped with a spring-loaded assembly 8 that drives the arc-shaped polymer fence 62 to rebound. The spring-loaded assembly 8 includes an outer column groove 81 and an inner sleeve column 82. The outer column groove 81 is installed on both sides of the top of the mounting platform 61, and the inner sleeve column 82 slides in the outer column groove 81. The top of the inner sleeve column 82 is connected to the top wall of the outer column groove 81 through a return spring 83, and the bottom of the inner sleeve column 82 is fixedly connected to the top two sides of the arc-shaped polymer fence 62. The outer walls of the opposite side of the outer column groove 81 and the inner sleeve column 82 are respectively provided with a matching slot 811 and a ball-holding groove 821. The slot 811 is opened at the lower part of the outer column groove 81, and the ball-holding groove 821 is opened at the upper part of the inner sleeve column 82. When the inner sleeve column 82 is in the pop-out state, the ball-holding groove 821 corresponds to the slot 811 in height.

[0042] In a preferred embodiment of this solution, by setting an external column groove 81 and an inner sleeve column 82, when the sand shooter 4 moves downward under the drive of the control component 5 and presses against the top surface of the mold, the high-temperature resistant contact base plate 621 at the bottom of the arc-shaped polymer fence 62 will be squeezed by the upper surface of the mold. This squeezing force is transmitted to the inner sleeve column 82, overcoming the locking limit of the locking component 9, and forcing the inner sleeve column 82 to slide upward and retract along the external column groove 81. At this time, the return spring 83 is compressed and stored, and the entire arc-shaped polymer fence 62 is completely retracted into the assembly table 61, thereby making room for the sand shooting operation and avoiding interference. After sand injection is completed, the sand injector 4 returns to its original position and rises. The squeezing force of the mold on the arc-shaped polymer fence 62 disappears, and the return spring 83 releases its stored elastic potential energy. Its restoring force pushes the inner sleeve column 82 to slide downward along the outer column groove 81, thereby driving the arc-shaped polymer fence 62 to pop out from the bottom of the mounting table 61 until its high-temperature resistant contact base plate 621 abuts against the top surface of the mold. When the inner sleeve column 82 slides to the preset pop-out position, the ball-holding groove 821 opened on it is aligned with the slot hole 811 at the bottom of the outer column groove 81 in height. At this time, the spherical end 93 of the locking component 9 can pass through the slot hole 811 and be inserted into the ball-holding groove 821 to achieve locking and ensure that the arc-shaped polymer fence 62 remains stable in position during subsequent scraping and cleaning.

[0043] Based on the above, the arc-shaped polymer fence 62 is passively stored during the sand-shooting stage and automatically popped up during the cleaning stage through the spring-loaded component 8. The structure is simple and reliable, and the action of the cleaning structure is deeply integrated with the main production process of the equipment (sand shooter 4 pressing down and lifting). By utilizing the mechanical interaction generated by the inherent action of the equipment and the energy storage and release characteristics of the spring, the state switching of the cleaning structure is driven, providing a key structural guarantee for achieving efficient and non-disruptive online automated cleaning.

[0044] Further, please refer to Figure 8 and Figure 13 The bottom of the arc-shaped polymer fence 62 is equipped with a high-temperature resistant contact base plate 621; the lower part of the inner wall of the arc-shaped polymer fence 62 is provided with a wall tooth section 622 arranged along its arc, which is used to scrape the residual sand on the top surface of the mold.

[0045] By continuously setting the toothed section 622 along the arc of the arc-shaped polymer fence 62, a scraping front with a continuous cutting edge is formed. During the scraping process, the toothed section 622 can penetrate into the residual sand layer, especially the sand layer that has been heated and slightly hardened, to effectively break, loosen and peel it off. This overcomes the problem of slippage and incomplete cleaning caused by smooth scrapers, thus ensuring that the mold closing top surface can be restored to a highly clean state after each cycle, laying the foundation for high-quality sand shooting in the next cycle. At the same time, the high-temperature resistant contact base plate 621 installed at the bottom of the arc-shaped polymer fence 62 can adapt to the high-temperature working conditions of the mold surface and maintain stable and tight contact with the mold surface during the scraping process, providing the necessary bottom boundary and sealing foundation for the cleaning operation.

[0046] Please see Figures 9-12 The mounting platform 61 is also equipped with a locking assembly 9, which includes: a horizontal rod 91, which is horizontally installed on the top of the mounting platform 61; two spring locking rods 92, which slide symmetrically on the left and right sides of the horizontal rod 91; and a spherical end 93, which is fixedly installed on the outer end of the spring locking rod 92. The spherical end 93 passes through the slot 811 on the outer column groove 81 and is inserted into the ball-holding groove 821 on the inner sleeve column 82.

[0047] In the preferred embodiment of this solution, by setting a horizontal bar 91, a spring locking bar 92, and a spherical end 93, when the arc-shaped polymer fence 62 pops out to the working position, the spherical end 93 of the locking component 9 can instantly lock into the ball groove 821 of the inner sleeve column 82. This locking state can resist the reverse force and vibration generated during the cleaning and scraping process, ensuring that the arc-shaped polymer fence 62 and its edge sand-gathering plate 63 and partition plate 64 maintain constant close contact and relative position with the mold surface throughout the operation, providing a basic guarantee for efficient and thorough cleaning. Meanwhile, two spring locking rods 92 are symmetrically arranged on the left and right sides of the horizontal rod 91, acting to lock the two arc-shaped aggregate fences 62. This not only limits the locking of the arc-shaped aggregate fences 62, but also provides a stable guiding effect for the retraction and reset of the arc-shaped aggregate fences 62.

[0048] Please see Figure 2 , Figure 7 and Figure 10The edge sand blowing assembly 7 includes: an air supply pump 71, installed at the top of the support frame 3; an assembly frame 72, fixedly installed on the lower outer side of the sand ejector 4, with the front end of the assembly frame 72 fixedly connected to the mounting platform 61, and a top cover installed on the top of the mounting platform 61; a built-in U-shaped tube 73, embedded inside the assembly frame 72, one end of which is connected to the air outlet of the air supply pump 71 through a pipeline, and the other end is connected to the air inlet of the telescopic air pipe 74 located in the inner cavity of the top wall of the mounting platform 61; an inclined air guide port 75 is installed on the inner wall of the edge sand gathering plate 63, and the edge sand gathering plate 63 is connected to the exhaust end of the telescopic air pipe 74; during operation, the airflow generated by the air supply pump 71 is guided into the edge sand gathering plate 63 through the built-in U-shaped tube 73 and the telescopic air pipe 74, and then discharged through the inclined air guide port 75, which helps to push the edge sand particles to move towards the center of the cleaning structure.

[0049] In a preferred embodiment of this solution, by setting up an air supply pump 71, an assembly frame 72, a built-in U-shaped tube 73, a telescopic air tube 74, and an angled air guide port 75, and by integrating the angled air guide port 75 into the inner wall of the edge sand-gathering plate 63 and setting its spray angle, a directional and concentrated centripetal airflow can be generated. This airflow acts precisely on the edge areas on both sides of the upper surface of the mold, which can efficiently blow the scattered residual sand to the center of the cleaning structure for concentrated and effective removal. Secondly, the built-in U-shaped tube 73 is embedded in the assembly frame 72 which is fixed to the sand ejector 4, and the telescopic air tube 74 is connected to the arc-shaped aggregate fence 62 in the moving assembly platform 61. This design makes the entire air circuit system integrated with the sand ejector 4 and the cleaning structure, and moves synchronously with them. The built-in U-shaped tube 73 effectively alleviates the twisting of the pipeline, and the telescopic air tube 74 adapts to the displacement changes of the arc-shaped aggregate fence 62 as it rises and falls (the top wall of the assembly platform 61 has an inner cavity that can accommodate the telescopic air tube 74, so as to avoid it affecting the inward retraction of the arc-shaped aggregate fence 62), ensuring the continuity, sealing and reliability of the air circuit in complex movements, and avoiding the risk of pipeline entanglement, wear and fall-off. At the same time, the airflow generated by the edge sand blowing component 7 and the mechanical scraping action of the arc-shaped aggregate fence 62 are precisely coordinated in time and space. While scraping and removing residual sand, the airflow intervenes immediately, on the one hand to assist in the removal, and on the other hand to softly collect and guide the lightweight and easily airborne sand particles, forming a collaborative cleaning mode with mechanical as the main force and pneumatic as the auxiliary force, which significantly enhances the cleaning effect on the edge area.

[0050] Please see Figure 3 The rear of the frame 1 is provided with a collection assembly 10, which includes: a hydraulic rod 101, which is installed on the top rear side of the frame 1; a flat plate 102, which is installed on the telescopic end of the hydraulic rod 101; and two collection troughs 103, which are respectively installed on the top two sides of the flat plate 102. During operation, the hydraulic rod 101 drives the flat plate 102 and the collection troughs 103 to move horizontally upward, so that the collection troughs 103 are located below the discharge port of the arc-shaped polymer fence 62 to receive and clean residual sand.

[0051] In the preferred embodiment of this solution, by setting up a hydraulic rod 101, a flat plate 102 and a collection tank 103, the hydraulic rod 101 drives the collection tank 103 to move precisely to the unloading port of the arc-shaped aggregate fence 62, which can collect the residual sand after stripping and agglomeration at a fixed point. The collection process is highly automated and basically does not affect the main production cycle. It realizes the automated online treatment of waste flow and is a key link in forming a complete and continuous automated production cycle. Meanwhile, two symmetrical collection troughs 103 are set up, which can respectively correspond to the cleaning and unloading points of the dual-station mold assembly 2, reducing the idle waiting or moving time of the equipment and significantly improving the operating efficiency and equipment utilization rate per unit time.

[0052] Please see Figures 4-6 The control component 5 includes: an electric slide rail frame 51, installed on the left and right sides of the top wall of the support frame 3; a horizontal moving seat 52, which slides within the electric slide rail frame 51, and an elastic lifting seat slides within the horizontal moving seat 52, with a sand ejector 4 installed at the bottom of the elastic lifting seat; the sand ejector 4 is connected to the sand supply box on the rear side of the top of the support frame 3 via a pipeline; and a push cylinder 53, installed on the left and right sides of the front top of the support frame 3.

[0053] In the preferred embodiment of this solution, by setting up an electric slide rail frame 51, a horizontal moving seat 52, and a pushing cylinder 53, the first control component 5 is the actuator that drives the sand ejector 4 to complete its inherent working cycle (forward movement - downward sand ejection - lifting - backward movement and reset). In this application, the regular movement of the sand ejector 4 driven by this component synchronously triggers the deployment, scraping, and reset of the surrounding sand cleaning component 6. Specifically, the lifting of the sand ejector 4 creates space for the cleaning structure to pop out, and the backward movement directly provides scraping power. This ensures that the online cleaning function is fully compatible with the existing production process without the need to add an independent drive unit or allocate additional working time, and achieves seamless integration of the cleaning action into the core production cycle.

[0054] Example 2, please refer to Figures 1-13 This application also provides a method for using a core-making device for casting sand cores, including the following steps: S1. First, the sand ejector 4 is driven by the control component 5 to move above the mold closing top surface of the mold assembly 2 to complete the sand injection. Then the sand ejector 4 is lifted vertically. S2. During the lifting process of the sand ejector 4, the arc-shaped polymer fence 62 is not pressed by the mold, and thus pops out from the bottom of the assembly table 61. Its bottom is in close contact with the top surface of the mold, so that an arc-shaped surrounding cleaning structure is pre-formed on the leading edge of the upper surface of the mold in the mold-closed state. At the same time, the spring-loaded component 8 and the locking component 9 work together to securely lock the arc-shaped polymer fence 62 in the pop-out position. S3, the control component 5 drives the sand ejector 4 to move horizontally backward, causing the mounting platform 61 at its front end and the locked arc-shaped polymer fence 62 to move backward along the top surface of the mold. During this process, the arc-shaped polymer fence 62 scrapes off the residual sand through the toothed section 622 at its bottom, and the partition plates 64 set at intervals on it separate and guide the sand flow. At the same time, the edge sand blowing component 7 is activated, and the airflow is ejected through the inclined air guide port 75 on the inner wall of the edge sand gathering plate 63 symmetrically installed on both sides of the fence, and directionally blows the residual sand on both sides of the upper surface of the mold, causing it to gather in the middle of the cleaning structure. Thus, the mechanical scraping, sand flow separation and pneumatic guidance work together to efficiently gather, surround and guide the residual sand to the preset discharge port. S4. The collecting component 10 is activated to collect the residual sand falling from the discharge port. Then the locking component 9 is unlocked, and the arc-shaped aggregate fence 62 retracts and resets under the action of the spring-loaded component 8. All components return to the standby state.

[0055] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A core-making device for casting sand cores, comprising a frame (1), two sets of mold assemblies (2) symmetrically mounted on the frame (1), a support frame (3) mounted at the rear of the frame (1), and two sets of sand ejectors (4) symmetrically arranged on the support frame (3), wherein the support frame (3) is provided with a control component (5) for driving the sand ejectors (4) to move and lift; characterized in that: The front end of the sand ejector (4) is provided with a sand cleaning component (6), which is connected to the edge sand blowing component (7) located on the top of the support frame (3); The surrounding sand cleaning component (6) includes: The assembly platform (61) is placed at the front end of the sand shooter (4) and the arc-shaped polymer fence (62) slides on the bottom of the assembly platform (61) and can pop down. The arc-shaped polymer fence (62) is symmetrically equipped with edge sand-gathering plates (63) on both sides, and multiple partition plates (64) are installed at intervals along the circumference in the middle of the arc-shaped polymer fence (62). During operation, the arc-shaped aggregate fence (62) pops out downward and abuts against the mold assembly (2) top surface when the sand ejector (4) rises. Then, when the sand ejector (4) moves back to reset, it encloses, guides, gathers and cleans the residual sand on the mold top surface.

2. The core-making equipment for casting sand cores as described in claim 1, characterized in that, The assembly platform (61) is equipped with a spring-loaded component (8) that drives the arc-shaped polymer fence (62) to rebound. The spring-loaded component (8) includes an outer column groove (81) and an inner column (82). The assembly platform (61) has external column grooves (81) installed on both sides of its top, and an inner column (82) slides inside the external column grooves (81). The top of the inner sleeve column (82) is connected to the top wall of the outer column groove (81) through a reset spring (83), and the bottom of the inner sleeve column (82) is fixedly connected to both sides of the top of the arc-shaped aggregate fence (62). The outer wall of the outer column groove (81) and the inner sleeve column (82) on opposite sides are respectively provided with a matching slot (811) and a ball-holding groove (821). The slot (811) is located at the lower part of the external column slot (81), and the ball-holding groove (821) is located at the upper part of the inner sleeve column (82). When the inner sleeve column (82) is in the pop-out state, the ball-holding groove (821) corresponds to the slot (811) in height.

3. The core-making equipment for casting sand cores as described in claim 2, characterized in that, The assembly table (61) is also provided with a locking component (9), which includes: A horizontal bar (91) is installed horizontally on the top of the mounting platform (61); There are two spring locking rods (92), which slide symmetrically on the left and right sides of the horizontal rod (91); The spherical end (93) is fixedly installed on the outer end of the spring locking rod (92). The spherical end (93) passes through the slot (811) on the outer column groove (81) and is inserted into the ball-holding groove (821) on the inner sleeve column (82).

4. The core-making equipment for casting sand cores as described in claim 1, characterized in that, The bottom of the arc-shaped polymer fence (62) is equipped with a high-temperature resistant contact base plate (621). The lower part of the inner wall of the arc-shaped polymer fence (62) is provided with a wall tooth section (622) arranged along its arc, which is used to scrape the residual sand on the top surface of the mold.

5. The core-making equipment for casting sand cores as described in claim 1, characterized in that, The edge sandblasting assembly (7) includes: An air supply pump (71) is installed at the top of the support frame (3); The assembly frame (72) is fixedly installed on the lower outer side of the sand ejector (4), and the front end of the assembly frame (72) is fixedly connected to the assembly table (61), and the top of the assembly table (61) is equipped with a top cover; The built-in U-shaped tube (73) is embedded inside the assembly frame (72). One end of it is connected to the air outlet of the air supply pump (71) through a pipeline, and the other end is connected to the air inlet of the telescopic air pipe (74) located in the inner cavity of the top wall of the assembly table (61). The inner wall of the edge sand-gathering plate (63) is equipped with an inclined air guide port (75), and the edge sand-gathering plate (63) is connected to the exhaust end of the telescopic air pipe (74). During operation, the airflow generated by the air supply pump (71) is introduced into the edge sand-gathering plate (63) through the built-in U-shaped pipe (73) and the telescopic air pipe (74), and then discharged through the inclined air guide port (75), which helps to push the edge sand particles to move towards the center of the cleaning structure.

6. The core-making equipment for casting sand cores as described in claim 1, characterized in that, The rear of the rack (1) is provided with a collection assembly (10), the collection assembly (10) comprising: Hydraulic rod (101), which is mounted on the top rear side of the frame (1); A flat plate (102) is installed at the telescopic end of the hydraulic rod (101); There are two collection troughs (103), which are installed on the top sides of the flat plate (102) respectively; During operation, the hydraulic rod (101) drives the flat plate (102) and the collection tank (103) to move horizontally upward, so that the collection tank (103) is located below the discharge port of the arc-shaped polymer fence (62) to receive and clean residual sand.

7. The core-making equipment for casting sand cores as described in claim 1, characterized in that, The control component (5) includes: Electric slide rail bracket (51) is installed on the left and right sides of the top wall of the support frame (3); A horizontally movable seat (52) slides within an electric slide rail frame (51), and an elastic lifting seat slides within the horizontally movable seat (52). A sand-shooting device (4) is installed at the bottom of the elastic lifting seat. The sand ejector (4) is connected to the sand supply box on the rear side of the top of the support frame (3) via a pipeline; The push cylinder (53) is installed on the left and right sides of the top front of the support frame (3).

8. The core-making equipment for casting sand cores as described in claim 1, characterized in that, The mold assembly (2) includes: The guide rail frame (21) is installed on both sides of the top of the frame (1); A static mold (22) is fixedly installed on one side of the guide rail frame (21); The moving mold (23) slides on the other side of the guide rail frame (21), and the moving mold (23) is pushed by the mold closing cylinder fixed on the same side of the guide rail frame (21); When the static mold (22) and the moving mold (23) are in the closed state, their common upper surface constitutes the closed top surface.

9. A method of using a core-making device for casting sand cores, characterized in that, The core-making equipment for casting sand cores according to any one of claims 1-8 includes the following steps: S1. First, the sand ejector (4) is driven by the control component (5) to move to the top surface of the mold assembly (2) to complete the sand ejection. Then the sand ejector (4) is lifted vertically. S2. During the lifting process of the sand ejector (4), the arc-shaped polymer fence (62) is not pressed by the mold, and thus pops out from the bottom of the assembly table (61). Its bottom is in close contact with the top surface of the mold, so that an arc-shaped surrounding cleaning structure is pre-formed on the front edge of the upper surface of the mold in the mold-closed state. At the same time, the spring-pressing component (8) and the locking component (9) work together to lock the arc-shaped polymer fence (62) firmly in the pop-out position. S3. The control component (5) drives the sand ejector (4) to move horizontally backward, which in turn drives the assembly platform (61) at its front end and the locked arc-shaped polymer fence (62) to move backward along the top surface of the mold. During this process, the arc-shaped polymer fence (62) scrapes off the residual sand through the wall tooth section (622) at its bottom. The partition plates (64) set at intervals on it separate and guide the sand flow. At the same time, the edge sand blowing component (7) is activated. The airflow is sprayed out through the inclined air guide port (75) on the inner wall of the edge sand gathering plate (63) symmetrically installed on both sides of the fence, and the edge residual sand on both sides of the upper surface of the mold is blown in a directional manner, so that it gathers in the middle of the cleaning structure. Thus, the mechanical scraping, sand flow separation and pneumatic guidance work together to efficiently gather, surround and guide the residual sand to the preset discharge port. S4. The collecting component (10) is activated to collect the residual sand falling from the discharge port. Then the locking component (9) is unlocked, and the arc-shaped aggregate fence (62) retracts and resets under the action of the spring-loaded component (8). All components return to the standby state.

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