Purging device used before parting pouring of iron mold sand-coated mold

Abstract

The invention discloses a blowing device before parting and pouring of a sand-coated iron mold, which comprises a rack, a mold box opening lifting hook arranged on the rack and used for lifting an upper mold, a driving structure used for driving the mold box opening lifting hook to lift, and a swinging blowing mechanism associated with the mold box opening lifting hook, the swing blowing mechanism comprises an overturning support and a linkage arm, the upper end of the overturning support is hinged to the rack, a blowing structure used for blowing residual sand is arranged at the inner end of the overturning support, and the overturning support is hinged to the mold box opening lifting hook through the linkage arm. The swing purging mechanism and the mold box opening lifting hook are arranged in a linkage mode, the purging structure is synchronously overturned to enter purging in the upper mold ascending box opening process, the purging structure is synchronously overturned out in the upper mold descending mold closing process, and compared with a traditional purging mode, the purging efficiency is greatly improved, and the influence on the production efficiency is small.

Description

Technical Field

[0001] This invention relates to the field of iron mold sand casting technology, and in particular to a blowing device for iron mold sand casting before parting and pouring. Background Technology

[0002] The iron mold with sand coating uses a high-temperature resistant iron mold as a rigid support. After the coated sand is shot, it is heated and solidified into a thin-shell mold. After the molten metal is poured, it solidifies under the combined action of the iron mold's rapid cooling and the sand mold's buffering effect. It is suitable for mass production of castings.

[0003] In the production process of casting mold sand coating, residual sand remaining in the mold is removed by blowing to ensure the dimensional accuracy and surface quality of the castings. Currently, compressed air is mostly used for blowing. For example, patent CN103464688A discloses an automatic blowing machine for casting cavities. The casting cavity includes an upper box and a lower box. The automatic blowing machine is equipped with a frame, a lifting system, a blowing system, and a control system. The blowing system has a hollow tubular blowing arm that can rotate, and multiple nozzles are provided on the blowing arm. The blowing arm is connected to a compressed air supply line. The blowing arm takes a long time to screw in and out after blowing, which affects production efficiency.

[0004] Existing technology cannot achieve thorough purging of the iron mold cavity before pouring, resulting in sand or slag inclusions on the surface of some casting products, which seriously affects the appearance quality of the casting products. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a pre-pouring purging device for iron molds covered with sand, aiming to achieve efficient purging with minimal impact on production efficiency.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: The pre-pouring blowing device for the iron mold sand coating mold includes a frame, a mold opening hook for lifting the upper mold and a drive structure for driving the lifting hook to lift. It also includes a swing blowing mechanism associated with the mold opening hook. The swing blowing mechanism includes a flipping bracket and a linkage arm. The upper end of the flipping bracket is hinged to the frame, and the inner end of the flipping bracket is provided with a blowing structure for blowing away residual sand. The flipping bracket and the mold opening hook are hinged together by the linkage arm.

[0007] Further or preferred: The top of the frame is equipped with a top frame, and a lifting cylinder is mounted on the top frame. The upper end of the piston rod of the lifting cylinder is connected to a top plate. A lifting plate is located in the frame. The lifting plate and the top plate are connected by a mold opening and closing lifting rod. The upper end of the mold opening hook is fixed on the lifting plate.

[0008] The lifting plate is provided with mold opening hooks on both sides, and each mold opening hook is provided with a corresponding swing blowing mechanism.

[0009] The purging structure is a purging pipe with a set of nozzles and a connector structure at the end of the purging pipe that connects to an external air pipe.

[0010] The flip-up bracket is a frame structure.

[0011] The swing purging mechanism also includes a fixed bracket, which includes a fixed plate and a lug on the fixed plate. The fixed plate is fixed to the frame, and the upper end of the flip bracket is hinged to the lug.

[0012] The fixing plate is located outside the mold opening hook, and the length direction of the fixing plate is consistent with the production track direction of the mold.

[0013] The linkage arms are a set arranged side by side. A connecting rod is provided on the flipping bracket. One end of the linkage arm is hinged to the connecting rod, and the other end of the linkage arm is hinged to the mold opening hook.

[0014] The frame is equipped with a lower mold limiting block to prevent the lower mold from being lifted.

[0015] Compared with the prior art, the present invention has the following advantages: The purging device for the iron mold sand coating mold before casting has a reasonable structural design. The swing purging mechanism is linked with the mold opening hook. During the process of the upper mold rising and opening the mold, the purging structure flips synchronously to enter the purging process. During the process of the upper mold falling and closing the mold, the purging structure flips synchronously to exit the mold. Compared with the traditional purging method, the purging efficiency is greatly improved and the impact on production efficiency is small. Attached Figure Description

[0016] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings: Figure 1 This is a three-dimensional schematic diagram of the device of the present invention.

[0017] Figure 2 This is a top view of the device of the present invention.

[0018] Figure 3 This is a front view of the device of the present invention.

[0019] Figure 4 and Figure 5 This is a schematic diagram of the swing-blowing mechanism of the present invention.

[0020] In the picture: 1. Frame, 2. Top frame, 3. Guide sleeve, 4. Mold opening and closing lifting rod, 5. Lifting cylinder 6. Swinging purging mechanism; 601. Tilting bracket; 602. Fixed bracket; 603. Linkage arm; 604. Purging structure. 7. Lower mold, 8. Lower mold limit block, 9. Mold opening hook, 10. Hydraulic oil pipe, 11. Connecting air pipe. Detailed Implementation

[0021] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and through the description of the examples.

[0022] like Figures 1 to 5 As shown, the pre-casting purging device for the iron mold sand coating mold includes a frame 1, a mold opening hook 9 mounted on the frame for lifting the upper mold, a drive structure for driving the lifting of the mold opening hook, and a swing purging mechanism 6 associated with the mold opening hook.

[0023] The swing blowing mechanism 6 includes a tilting bracket 601 and a linkage arm 603. The upper end of the tilting bracket is hinged to the frame, and the inner end of the tilting bracket is provided with a blowing structure 604 for blowing away residual sand. The tilting bracket and the mold opening hook are hinged together by the linkage arm.

[0024] The present invention has a reasonable design for the blowing device before casting of the iron mold with sand coating. The swing blowing mechanism is linked with the mold opening hook. During the process of the upper mold rising and opening the mold, the blowing structure flips synchronously to enter the blowing process. During the process of the upper mold falling and closing the mold, the blowing structure flips synchronously to exit the mold. Compared with the traditional blowing method, the blowing efficiency is greatly improved and the impact on production efficiency is small.

[0025] The frame 1 includes columns, with two or more columns arranged side by side on each side. The top of the columns on both sides is provided with a top frame 2, which is connected to form an integral frame structure. The production track of the mold passes through the frame and is located between the columns on both sides. The production track is a set of rollers arranged along the track running direction, and the lower mold edge rests on the rollers to run.

[0026] The top frame is equipped with a lifting cylinder 5, and the frame is equipped with a hydraulic oil pipe 10 connected to the lifting cylinder; the upper end of the piston rod of the lifting cylinder is connected to the top plate, the frame is equipped with a lifting plate, the lifting plate and the top plate are connected by a mold opening and closing lifting rod 4, the top frame is equipped with a guide sleeve 3, the mold opening and closing lifting rod passes through the guide sleeve, and the upper end of the mold opening hook is fixed on the lifting plate; the lifting operation is stable and reliable.

[0027] The lifting plate is equipped with mold opening hooks 9 on both sides. The mold opening hooks on both sides hook the edge of the upper mold to lift it and open the box. The frame is equipped with a lower mold limit block 8 to prevent the lower mold 7 from being lifted. Specifically, the lower mold limit block has a stepped groove on its inner side, and the edge of the lower mold is located below the stepped groove. The lower mold limit block restricts the upward movement of the lower mold, making the opening stable and reliable.

[0028] In this invention, each mold opening hook on each side is equipped with a corresponding swing blowing mechanism 6; that is, the swing blowing mechanisms on both sides are symmetrically arranged, and the mold opening hook drives synchronous flipping and blowing, without the need to reserve blowing time separately, and has basically no impact on normal production.

[0029] like Figure 4 and Figure 5 As shown, the flipping bracket 601 has an L-shaped frame structure. When the upper mold is lifted to the highest position, the L-shaped frame structure is in the upright position. The blowing structure is located above the middle of the lower mold. The blowing structure can perform blowing work during both the flipping in and flipping out processes, ensuring thorough blowing.

[0030] The purging structure is a purging pipe, which is fixed to the inner end of the tilting bracket. The purging pipe is set along the track direction and has a set of nozzles. The end of the purging pipe has a connector structure for connecting to an external air pipe. The air pipe is a flexible hose and is connected to an external compressed air source through a connecting air pipe 11 set on the frame.

[0031] The swing purging mechanism also includes a fixed bracket 602, which includes a fixed plate and lugs on the fixed plate. The fixed plate is fixed to the frame, and the upper end of the tilting bracket is hinged to the lugs. Specifically, the fixed plate is fastened to two columns on one side of the frame by fasteners or welding. The fixed plate is provided with two lugs. The upper end of the tilting bracket is fixed with a connecting shaft, and the end of the connecting shaft is hinged to the corresponding lug. The installation is simple and the structure is stable and reliable.

[0032] The fixing plate is located outside the mold opening hook. The length direction of the fixing plate is consistent with the production track direction of the mold. After the mold is closed, the flipping bracket is located outside the mold, and the operation is stable and reliable.

[0033] The linkage arms 603 are a set arranged side by side. The flipping bracket is equipped with a connecting rod. One end of the linkage arm is hinged to the connecting rod, and the other end of the linkage arm is hinged to the mold opening hook. The flipping bracket includes two L-shaped plates, which are connected by a set of connecting rods to form a frame structure and are connected to the purge pipe. The structure is compact, stable and reliable.

[0034] The above description is merely an illustration of preferred embodiments of the present invention, and the above technical features can be arbitrarily combined to form multiple embodiments of the present invention.

[0035] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the concept and technical solution of the present invention, or the direct application of the concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A pre-pouring and purging device for a sand-coated iron mold, comprising a frame, a mold opening and lifting hook mounted on the frame for lifting the upper mold, and a drive structure for driving the lifting and lowering of the mold opening and lifting hook, characterized in that: It also includes a swing blowing mechanism associated with the mold opening hook. The swing blowing mechanism includes a flipping bracket and a linkage arm. The upper end of the flipping bracket is hinged to the frame. The inner end of the flipping bracket is provided with a blowing structure for blowing away residual sand. The flipping bracket and the mold opening hook are hinged together by the linkage arm.

2. The pre-pouring and purging device for sand-coated iron molds as described in claim 1, characterized in that: The top of the frame is equipped with a top frame, and a lifting cylinder is mounted on the top frame. The upper end of the piston rod of the lifting cylinder is connected to a top plate. A lifting plate is located in the frame. The lifting plate and the top plate are connected by a mold opening and closing lifting rod. The upper end of the mold opening hook is fixed on the lifting plate.

3. The pre-pouring and purging device for sand-coated iron molds as described in claim 2, characterized in that: The lifting plate is provided with mold opening hooks on both sides, and each mold opening hook is provided with a corresponding swing blowing mechanism.

4. The pre-pouring and purging device for sand-coated iron molds as described in claim 1, characterized in that: The purging structure is a purging pipe with a set of nozzles and a connector structure at the end of the purging pipe that connects to an external air pipe.

5. The pre-pouring and purging device for sand-coated iron molds as described in claim 4, characterized in that: The flip-up bracket is a frame structure.

6. The pre-pouring and purging device for sand-coated iron molds as described in claim 5, characterized in that: The swing-blowing mechanism also includes a fixed bracket, which includes a fixed plate and a lug on the fixed plate. The fixed plate is fixed to the frame, and the upper end of the tilting bracket is hinged to the lug.

7. The pre-pouring and purging device for sand-coated iron molds as described in claim 6, characterized in that: The fixing plate is located outside the mold opening hook, and the length direction of the fixing plate is consistent with the production track direction of the mold.

8. The pre-pouring and purging device for sand-coated iron molds as described in claim 6, characterized in that: The linkage arms are a set arranged side by side. A connecting rod is provided on the flipping bracket. One end of the linkage arm is hinged to the connecting rod, and the other end of the linkage arm is hinged to the mold opening hook.

9. The pre-pouring and purging device for sand-coated iron molds as described in any one of claims 1 to 8, characterized in that: The frame is equipped with a lower mold limiting block to prevent the lower mold from being lifted.

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