Self-unhooking investment precision casting sand box transfer device
By designing a self-detaching casting sand box transfer device, and employing heat insulation and automated control, the safety hazards of high-temperature operation by workers are solved, and the efficient and accurate transfer of sand boxes is achieved, improving transfer efficiency and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2026-03-10
AI Technical Summary
In the current process of transferring investment casting sand boxes, workers need to operate in a high-temperature environment, which poses safety hazards, and the transfer is not accurate and inefficient.
Design a self-detaching investment casting sand box transfer device. It adopts a temperature insulation mechanism to protect the hoisting mechanism, and combines a telescopic mechanism and a linkage locking mechanism to realize automatic hoisting and detachment, and automatically control the transfer of sand boxes.
Completely liberate workers from high-temperature environments, improve the accuracy and stability of sand box transportation, enhance transportation efficiency, improve the working environment, and reduce labor intensity.
Smart Images
Figure CN223983364U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of investment casting and intelligent industrial transfer technology, and in particular to a stable and reliable transfer device for investment casting sand boxes. Background Technology
[0002] Currently, ceramic molds used in investment casting require molding and preheating before pouring. Molding primarily involves two methods: sand-embedded molding and cotton-wrapped molding. Regardless of the method, to support and protect the ceramic mold and facilitate transfer, it is generally necessary to place the mold in a suitably sized sand box, which is then placed in a mold preheating furnace for preheating. After preheating to 800℃~1200℃ and holding at that temperature for a certain time, the ceramic mold is transferred from the preheating furnace to a vacuum induction casting furnace for pouring. The existing method for transferring the hot sand box involves workers wearing heat-resistant clothing hanging hooks on the sand box in the high-temperature preheating furnace, then using an overhead crane to lift the hooks and transfer the sand box to a designated location in the vacuum induction casting furnace. This method suffers from poor working conditions for workers, significant safety hazards, poor controllability of the overhead crane hook transfer, and low efficiency.
[0003] A literature search of existing technologies revealed that patent CN 216461704 U discloses a device for transferring and positioning investment casting sand boxes. This device employs a liftable forklift structure. By adjusting the height of the forklift's support frame to be flush with the bottom plate of the ceramic mold preheating furnace, workers use tools to drag the sand box onto the forklift support. Finally, it is transferred to the vacuum induction melting furnace using the same method. While this device is characterized by low cost, relatively flexible operation, and better controllability than overhead crane hook methods, workers still face a high-temperature working environment during the sand box dragging process. Furthermore, dragging the sand box can easily cause the ceramic mold to shift or even be damaged, thus failing to fundamentally improve the workers' working conditions and the efficiency of sand box transfer.
[0004] Therefore, how to completely liberate workers from high-temperature working environments and improve the accuracy, stability, and efficiency of sand box transfer is an urgent problem to be solved in the investment casting industry. Utility Model Content
[0005] One of the main objectives of this invention is to overcome at least one of the defects of the prior art and provide a self-detaching casting sand box transfer device that can completely liberate workers from high-temperature working environments and improve the accuracy, stability and efficiency of sand box transfer.
[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:
[0007] According to one aspect of the present invention, a self-detaching investment casting sand box transfer device is provided, applied to the transfer of investment casting sand boxes, wherein the investment casting sand box has a clamping slot on its side, comprising:
[0008] A hoisting mechanism, wherein the hoisting mechanism is a mobile hoisting mechanism and includes a wire rope;
[0009] A heat insulation mechanism, comprising a heat insulation part, a guide part, and a base, wherein the heat insulation part covers the guide part and the base, the guide part is mounted on the base and is capable of moving up and down relative to the hoisting mechanism, and the steel wire rope is threaded through the upper part of the base;
[0010] A telescopic mechanism, comprising a connecting seat, a support frame, and a telescopic frame, wherein the upper part of the telescopic frame is connected to the base, the lower part is slidably mounted on the support frame, and the support frame is mounted on the connecting seat;
[0011] The linkage locking mechanism comprises two or more sets, each set including a linkage and a locking hook. The upper part of the linkage is hinged to the side of the telescopic frame, the upper part of the locking hook is hinged to the lower part of the linkage, the middle part of the locking hook is rotatably mounted on the outside of the connecting seat, and the lower part of the locking hook is an inwardly protruding hook head.
[0012] According to a specific embodiment of the present invention, the hoisting mechanism includes a crane and a traveling frame, the crane travels along the traveling frame, the crane also includes a drive motor and a base, and the drive motor drives the wire rope to be wound up and down.
[0013] According to a specific embodiment of the present invention, the guide part includes a guide post, and the base is provided with a guide hole, wherein the guide post is slidably inserted into the guide hole.
[0014] According to a specific embodiment of this utility model, the telescopic mechanism further includes a locking block, which includes a head, a neck, and a body. The head is an elongated structure. The external dimensions of the neck are the same as the width of the head but less than the length of the head. The body is larger than the head and the neck. A lug is provided on the side of the body. The two ends of the neck are connected to the head and the body, respectively. A serrated groove is provided on the hollow outer edge of the telescopic frame. A baffle is provided on the support frame. A strip hole is provided on the baffle. The body rotates to engage with the hollow structure. The lug is engaged in the serrated groove. The length and width of the strip hole match the length and width of the head, respectively. The head is adjusted up and down on the baffle. The serrated groove drives the lug to rotate the body, which is in a first state and a second state, respectively. In the first state, the head can pass through the strip hole. In the second state, the head cannot pass through the strip hole.
[0015] According to a specific embodiment of the present invention, the telescopic frame includes a side plate, and a first hinge shaft is provided on the side plate. The position of the first hinge shaft is at the same height as the lowest point of the serrated groove.
[0016] According to a specific embodiment of this utility model, the hinge center between the connecting rod and the telescopic frame is point A, the hinge center between the connecting rod and the locking hook is point B, the hinge center between the locking hook and the connecting seat is point C, the inner root of the hook head is point D, the distance from point A to point B is a, the distance from point B to point C is b, the distance from point C to point D is c, and the distance from point A to the hoisting center axis of the hoisting mechanism is R. A The distance from point C to the hoisting center axis of the hoisting mechanism is R. C The distance from point D to the hoisting center axis of the hoisting mechanism is R. D The vertical distance between points D and C is h. The angle between the line connecting points C and D and the hook's bearing surface is α. The angle between the line connecting points B and C and the line connecting points C and D is β. The above dimensional and angular relationships satisfy: α=arctan((R C -R D ) / h)+90°,β
[0017] =arccos((R C -R A ) / (a+b))+180°-α.
[0018] According to a specific embodiment of the present invention, the lower part of the connecting seat is connected to three or more inclined regular blocks.
[0019] According to a specific embodiment of the present invention, the regularization block is symmetrically arranged along the hoisting center axis of the hoisting mechanism, and its inner surface is an inclined plane.
[0020] According to a specific embodiment of the present invention, the investment casting sand box includes an outer support box and an inner sand box, the inner sand box being housed within the outer support box, and the outer support box having a clamping hole groove on its side.
[0021] As can be seen from the above technical solution, the advantages and positive effects of the self-unhooking investment casting sand box transfer device of this utility model are as follows:
[0022] This utility model employs a heat insulation mechanism to protect the hoisting mechanism, and automatically raises and lowers through a telescopic mechanism. It also safely and reliably lifts and lowers the investment casting sand box through a linkage locking mechanism, achieving automatic hoisting and automatic unhooking. This completely liberates workers from high-temperature working environments and improves the accuracy, stability, and efficiency of investment casting sand box transfer. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the main structure of an embodiment of the self-detaching casting sand box transfer device of this utility model.
[0024] Figure 2 This is a three-dimensional structural schematic diagram of an embodiment of the self-detaching casting sand box transfer device of this utility model.
[0025] Figure 3 This is a three-dimensional structural diagram of the hoisting mechanism in one embodiment of the self-detaching casting sand box transfer device of this utility model.
[0026] Figure 4 yes Figure 1 A magnified schematic diagram of a local G structure.
[0027] Figure 5 This is a three-dimensional structural diagram of the telescopic mechanism without a connecting seat in one embodiment of the self-detaching casting sand box transfer device of this utility model.
[0028] Figure 6 This is a schematic diagram of the three-dimensional structure of the telescopic frame in one embodiment of the self-detaching casting sand box transfer device of this utility model.
[0029] Figure 7 This is a schematic diagram of the three-dimensional structure of the locking block in one embodiment of the self-unhooking casting sand box transfer device of this utility model.
[0030] Figure 8 This is a schematic diagram of the three-dimensional structure of the support frame in one embodiment of the self-detaching casting sand box transfer device of this utility model.
[0031] Figure 9 This is a three-dimensional structural diagram of the telescopic mechanism in one embodiment of the self-detaching casting sand box transfer device of this utility model.
[0032] Figure 10 This is a first-view schematic diagram of the cooperation structure between the telescopic mechanism and the connecting rod locking mechanism in one embodiment of the self-unhooking casting sand box transfer device of this utility model.
[0033] Figure 11 This is a second-view schematic diagram of the cooperation structure between the telescopic mechanism and the connecting rod locking mechanism in one embodiment of the self-unhooking casting sand box transfer device of this utility model.
[0034] Figure 12 This is a schematic diagram of the hoisting of the investment casting sand box in one embodiment of the self-detaching investment casting sand box transfer device of this utility model.
[0035] Figure 13 This is a schematic diagram of the hoisting of the investment casting sand box in another embodiment of the self-detaching investment casting sand box transfer device of this utility model.
[0036] Drawing number explanation:
[0037] 1. Lifting mechanism; 10. Overhead crane frame; 11. Crane; 110. Base; 111. Drive motor; 112. Drum; 113. Guide hole; 12. Wire rope; 2. Insulation mechanism; 21. Insulation section; 22. Guide section; 23. Base; 3. Telescopic mechanism; 31. Connecting seat; 311. Connecting seat body; 312. Hinge seat; 313. Hinge hole; 32. Support frame; 321. Baffle; 322. Strip hole; 323. Support seat; 324. Support frame body; 33. Telescopic frame; 331 332. Serrated slot; 333. Side plate; 334. First hinge shaft; 35. Connecting sleeve; 36. Locking block; 37. Head; 38. Neck; 39. Body; 30. Lug; 40. Linkage locking mechanism; 41. Linkage; 42. Locking hook; 421. Hook head; 5. Regularized block; 6. Investment casting sand box; 61. First clamping hole slot; 62. First ceramic mold shell; 63. Box sand; 7. Outer support box; 71. Second clamping hole slot; 8. Inner sand box; 81. Box sand; 82. Second ceramic mold shell. Detailed Implementation
[0038] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.
[0039] In the following description of various examples of the present invention, reference is made to the accompanying drawings, which form part of the present invention, and which illustrate by way of example different exemplary structures, systems, and steps that can implement various aspects of the present invention. It should be understood that other specific embodiments of the components, structures, exemplary devices, systems, and steps may be used, and structural and functional modifications may be made without departing from the scope of the present invention. Furthermore, although the terms “top,” “bottom,” “front,” “rear,” “side,” etc., may be used in this specification to describe various exemplary features and elements of the present invention, these terms are used herein only for convenience, such as the orientation according to the examples shown in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of the present invention.
[0040] Figure 1 This is a schematic diagram of the main structure of an embodiment of the self-detaching casting sand box transfer device of this utility model.
[0041] Figure 2This is a three-dimensional structural schematic diagram of an embodiment of the self-detaching casting sand box transfer device of this utility model.
[0042] Figure 12 This is a schematic diagram of the hoisting of the investment casting sand box in one embodiment of the self-detaching investment casting sand box transfer device of this utility model.
[0043] like Figure 1 , Figure 2 and Figure 12 As shown, a self-detaching investment casting sand box transfer device of this utility model is used for the transfer of investment casting sand box 6. The investment casting sand box 6 has a first clamping hole groove 61 on its side.
[0044] In this embodiment, the self-detaching casting sand box transfer device includes a hoisting mechanism 1, a heat insulation mechanism 2, a telescopic mechanism 3, and a connecting rod locking mechanism 4.
[0045] Figure 3 This is a three-dimensional structural diagram of the hoisting mechanism in one embodiment of the self-detaching casting sand box transfer device of this utility model.
[0046] like Figure 3 As shown, in this embodiment, the hoisting mechanism 1 is a mobile hoisting mechanism, which includes a crane 11, a gantry frame 10, and a wire rope 12. The crane 11 travels along the gantry frame 10 and includes a drive motor 111 and a base 110. The drive motor 111 drives the wire rope 12 to wind and unwind via a drum 112. The base 110 is also provided with multiple guide holes 113, all of which are through holes. In this embodiment, the gantry frame 10 is equipped with limit switches M and N at the sand box grab and release positions, respectively, enabling precise control of the crane's horizontal movement. The crane 11 uses a variable frequency drive motor for horizontal movement, and the drive motor 111 can be a variable frequency motor to control the winding and unwinding of the wire rope 12. In this embodiment, the lifting and horizontal movement speeds of the hoisting mechanism 1 are adjustable within the range of 1 mm / s to 500 mm / s. The lifting speed is 300mm / s for fast movement and 1mm / s for slow movement. The horizontal movement speed is 300mm / s for fast movement and 5mm / s for slow movement.
[0047] In this embodiment, the heat insulation mechanism 2 includes a heat insulation section 21, a guide section 22, and a base 23. The heat insulation section 21 covers the guide section 22 and the base 23, using a high-temperature resistant material to insulate against heat. The guide section 22 is mounted on the base 23 and can move vertically relative to the hoisting mechanism 1. A steel wire rope 12 passes through the upper part of the base 23. In this embodiment, the guide section 22 consists of multiple guide posts, the upper part of which passes through guide holes 113 on the base 110 and can slide vertically within them. There is a gap of 0.5-3mm between the guide section 22 and the guide holes 113, providing a certain degree of flexibility. The guide section 22 ensures the relative position of the heat insulation mechanism 2 and the hoisting mechanism 1 in the horizontal direction, thereby improving stability.
[0048] Figure 4 yes Figure 1 A magnified schematic diagram of a local G structure.
[0049] Figure 5 This is a three-dimensional structural diagram of the telescopic mechanism without a connecting seat in one embodiment of the self-detaching casting sand box transfer device of this utility model.
[0050] Figure 9 This is a three-dimensional structural diagram of the telescopic mechanism in one embodiment of the self-detaching casting sand box transfer device of this utility model.
[0051] like Figure 4 , Figure 5 and Figure 9 As shown, in this embodiment, the telescopic mechanism 3 includes a connecting seat 31, a support frame 32, and a telescopic frame 33. The upper part of the telescopic frame 33 is connected to the base 23 via a connecting sleeve 34, and the lower part is slidably mounted on the support frame 32, which is mounted on the connecting seat 31.
[0052] In this embodiment, the connecting seat 31 includes a connecting seat body 311 and a hinge seat 312. The hinge seat 312 is disposed on the outside of the connecting seat body 311 and has a hinge hole 313 thereon to hinge the locking hook 42.
[0053] Figure 8 This is a schematic diagram of the three-dimensional structure of the support frame in one embodiment of the self-detaching casting sand box transfer device of this utility model.
[0054] like Figure 8 As shown, in this embodiment, the support frame 32 includes a baffle 321, a strip hole 322, a support base 323, and a support frame body 324. The support frame body 324 is fixedly mounted on the connecting base body 311 of the connecting base via the support base 323. The baffle 321 is mounted on the support frame body 324, and the baffle 321 is provided with a strip hole 322, which is a through hole and has an elongated structure.
[0055] Figure 6This is a schematic diagram of the three-dimensional structure of the telescopic frame in one embodiment of the self-detaching casting sand box transfer device of this utility model.
[0056] like Figure 6 As shown, in this embodiment, the upper part of the telescopic frame 33 is connected to the base 23 via a connecting sleeve 34. The middle part has a hollow structure, and a serrated groove 331 is provided on the outer edge of the hollow part. The serrated groove 331 is similar to a wave shape, with corresponding upper and lower sections forming a staggered clamping groove. Side plates 332 are provided on both sides of the telescopic frame 33. Two symmetrical first hinge shafts 333 are provided on the two side plates 332. The position of the first hinge shafts 333 is at the same height as the lowest point of the serrated groove. In this embodiment, the serrated groove 331 includes an upper edge and a lower edge, both of which are approximately serrated, with staggered teeth arranged vertically. Each tooth occupies 1 / 4 of the circumference and includes a slanted section and a straight section.
[0057] Figure 7 This is a schematic diagram of the three-dimensional structure of the locking block in one embodiment of the self-unhooking casting sand box transfer device of this utility model.
[0058] like Figure 7 As shown, in this embodiment, the telescopic mechanism 3 further includes a locking block 35. The locking block 35 includes a head 351, a neck 352, and a body 353. In this embodiment, the head 351 is an elongated, flat structure with a width less than its length and a triangular vertical surface; in other embodiments, it can also be a semi-circular structure. The external dimensions of the neck 352 are the same as the width of the head 351 but less than its length. The dimensions of the body 353 are larger than both the head 351 and the neck 352. In this embodiment, the locking block 35 has a first state and a second state when its height relative to the support frame 32 changes. In the first state, the head 351 rotates to a position where its length corresponds to the length direction of the strip hole 322 and its width corresponds to the width direction of the strip hole 322, allowing the head 351 to pass through the strip hole 322 and the neck 352 to be fitted and clamped within the strip hole 322. The head 351 rotates as its height changes. When it reaches the second state, the length direction of the head 351 does not correspond to the length direction of the strip hole 322, and the width direction does not correspond to the width of the strip hole 322. As a result, the head 351 cannot pass through the strip hole 322, causing the baffle 321 to jam the neck 352, separating the head 351 and the body 353, and locking the locking block 35 onto the support frame 32.
[0059] In this embodiment, the body 353 has two lugs 354 on its side, symmetrically arranged. The body 353 rotates to engage with the hollow portion of the telescopic frame 33, with the lugs 354 engaging in the serrated grooves 331. As the base 23 and wire rope 12 rise and fall, and the weight of the investment casting sand box 6 is applied, the lugs 354 move up and down within the serrated grooves 331 due to the engagement of the serrated grooves 331 and the lugs 354. Since the serrated grooves 331 are circumferentially distributed, this causes the body 353 to rotate relative to the hollow portion of the telescopic frame 33, adjusting the posture and height of the head 351 to achieve the first and second states described above. In the second state, the head 351 can lock the telescopic frame 33 relative to the support frame 32, ensuring the safety of the investment casting sand box 6 during hoisting.
[0060] Figure 10 This is a first-view schematic diagram of the cooperation structure between the telescopic mechanism and the connecting rod locking mechanism in one embodiment of the self-unhooking casting sand box transfer device of this utility model.
[0061] Figure 11 This is a second-view schematic diagram of the cooperation structure between the telescopic mechanism and the connecting rod locking mechanism in one embodiment of the self-unhooking casting sand box transfer device of this utility model.
[0062] like Figure 10 and Figure 11 As shown, in this embodiment, there are two sets of linkage locking mechanisms 4; in other embodiments, there may be three, four, or six sets. Each set of linkage locking mechanisms 4 includes a linkage 41 and a locking hook 42. In this embodiment, the upper part of the linkage 41 is hinged to the first hinge shaft 333 of the side plate 332 of the telescopic frame 33; the upper part of the locking hook 42 is hinged to the lower part of the linkage 41 via a second hinge shaft; the middle part of the locking hook 42 is rotatably mounted on the outside of the connecting seat 31 via a third hinge shaft and a hinge hole 313 on the connecting seat 31; and the lower part of the locking hook 42 is an inwardly protruding hook head 421.
[0063] In this embodiment, the hoisting mechanism 1 drives the insulation mechanism 2 and the telescopic frame 33 to move via the wire rope 12, thereby causing the telescopic frame 33 to have different positions relative to the support frame 32. The connecting rod 41 drives the locking hook 42 to rotate relative to the connecting seat 31 under the change of distance, so that the hook head 421 extends into or exits the first clamping hole slot 61.
[0064] In this embodiment, the hinge center between the connecting rod 41 and the telescopic frame 33 is point A, the hinge center between the connecting rod 41 and the locking hook 42 is point B, the hinge center between the locking hook 42 and the connecting seat 31 is point C, and the inner root of the hook head 421 is point D. The distance from point A to point B is 'a', the distance from point B to point C is 'b', the distance from point C to point D is 'c', and the distance from point A to the hoisting center axis of the hoisting mechanism 1 is 'R'. AThe distance from point C to the hoisting center axis of hoisting mechanism 1 is R. C The distance from point D to the hoisting center axis of hoisting mechanism 1 is R. D The vertical distance between points D and C is h. The angle between the line connecting points C and D and the bearing surface of hook 421 is α. The angle between the line connecting points B and C and the line connecting points C and D is β. The above dimensional and angular relationships satisfy: α=arctan((R C -R D ) / h)+90°,β=arccos((R C -R A ) / (a+b))+180°-α.
[0065] In this embodiment, a specific dimension is used as an example as follows. When the hook head 421 of the locking hook 42 is in the state of gripping the investment casting sand box 6, points A, B, and C are on the same straight line, and the connecting rod 41 and the locking hook 42 are locked under their own weight, ensuring safe gripping. Wherein, a = 100mm, b = 200mm,
[0066] R A =250mm, R C =400mm, R D =300mm, h=100mm, so the angles are: α=135°, β=105°.
[0067] In this embodiment, when the locking hook 42 grips the investment casting sand box 6 in its final position, points A, B, and C are on the same straight line, meaning the distance between points A and C reaches its maximum. At this point, the linkage locking mechanism 4 can lock under its own weight, ensuring safety during the gripping process of the investment casting sand box 6. In this embodiment, the locking hook 42 is in an open state before gripping the investment casting sand box 6, and the neck 351 of the locking block 35 is restricted within the slot 322 of the baffle 321, with the head 351 at the lowest point of the lower edge of the baffle 321. The crane 11 lowers the wire rope 12, and the heat insulation mechanism 2, the telescopic mechanism 3, and the linkage locking mechanism 4 all descend. When the connecting seat 311 of the connecting seat 31 falls to contact the grasped investment casting sand box 6, the connecting seat 31 and the support frame 32 fixed on the connecting seat 31 stop descending, while the telescopic frame 33 and the connecting rod 41 continue to descend. When the head 351 on the locking block 35 descends to contact the baffle 321, the locking block 35 is stopped by the baffle 321 and stops descending. At this time, the telescopic frame 33 continues to descend, and the lug 354 on the locking block 35 begins to rise relative to the lower edge of the serrated groove 331 until it contacts the upper edge of the serrated groove. At this time, the telescopic frame 33 continues to descend, and the lug 354 rotates and rises along the upper edge, and the head 351 rotates at a certain angle. When the lug 354 moves relative to the telescopic frame 33 to the highest point of the upper edge of the serrated groove 331, the head 351 rotates 45°, and the telescopic frame 33 reaches its lowest point. Subsequently, the crane 11 retracts the wire rope 12, and the telescopic frame 33 begins to rise. The locking block 35 descends relative to the telescopic frame 33, and after contacting the lower edge of the serrated groove 331, it moves along the lower edge of the serrated groove 331 to the lowest point under its own weight, at which point the head 351 rotates 45°. The telescopic frame 33 continues to rise. Since the head has rotated 90° back and forth, its length direction is now aligned with the strip hole 322, allowing it to easily disengage from the strip hole 322. The telescopic frame 33 then rises relative to the locking hook 42, and the locking hook 42 gradually closes via the connecting rod 41. At the highest point of ascent, the connecting rod locking mechanism 4 locks itself and the investment casting sand box 6 by gravity, and the hook head 421 is fully closed. The telescopic frame 33 continues to rise, finally completing the grabbing action of the investment casting sand box 6. When the investment casting sand box 6 is picked up to the designated position, the crane 11 lowers the wire rope 12. After the investment casting sand box 6 has completely fallen, the telescopic frame 33 continues to descend, and the linkage locking mechanism 4 drives the hook head 421 to gradually open. As mentioned above, the locking block 35 rotates 90 degrees under the action of the sawtooth groove 331 of the telescopic frame 33. At this time, the length direction of the head 351 of the locking block 35 is perpendicular to the length direction of the strip hole 322, and it cannot be disengaged from the strip hole 322. The hook head 421 remains open, thereby realizing the automatic disengagement of the investment casting sand box 6.
[0068] In this embodiment, the lower part of the connecting seat 31 is connected to three or more inclined leveling blocks 5. In this embodiment, the leveling blocks 5 are symmetrically arranged along the lifting center axis of the lifting mechanism 1, and their inner surfaces are inclined planes. The leveling blocks 5 can abut against the upper outer edge of the investment casting sand box 6 through their inclined planes, thereby achieving positioning and ensuring that the central axis of the investment casting sand box 6 is collinear with the lifting center axis of the lifting mechanism 1, avoiding misalignment and improving the safety of lifting the investment casting sand box 6. In addition, when the inner shell of the investment casting sand box is higher than the box body, the leveling blocks 5 can prevent the hook 42 from touching and crushing the shell when the hook head 421 of the locking hook 42 grips it.
[0069] In this embodiment, a communication interface is also provided, which can be controlled by the control system to realize the automated transfer of the investment casting sand box 6.
[0070] Figure 12 This is a schematic diagram of the hoisting of the investment casting sand box in one embodiment of the self-detaching investment casting sand box transfer device of this utility model.
[0071] like Figure 12 As shown, in this embodiment, the connecting seat has an inverted "U" shaped hollow protruding structure, the investment casting sand box 6 is an investment casting sand box, the investment casting sand box 6 contains a first ceramic shell 62, and the investment casting sand box 6 outside the first ceramic shell 62 is filled with box sand 63.
[0072] In this embodiment, a specific dimension is used as an example as follows. When the hook head 421 of the locking hook 42 is in the state of gripping the investment casting sand box 6, points A, B, and C are on the same straight line, and the connecting rod 41 and the locking hook 42 are locked under their own weight, ensuring safe gripping. Wherein, a = 100mm, b = 200mm,
[0073] R A =250mm, R C =400mm, R D =300mm, h=200mm, therefore the angle is: α=116°33′
[0074] 54″, β=123°26′06″.
[0075] Figure 13 This is a schematic diagram of the hoisting of the investment casting sand box in another embodiment of the self-detaching investment casting sand box transfer device of this utility model.
[0076] like Figure 13 As shown, in this embodiment, a specific dimension is used as an example. When the hook head 421 of the locking hook 42 is in the state of gripping the box tray 7, points A, B, and C are on the same straight line, and the connecting rod 41 and the locking hook 42 are locked under their own weight, ensuring safe gripping. Where a = 100mm, b = 200mm,
[0077] R A =250mm, R C =400mm, R D =300mm, h=200mm, therefore the angle is: α
[0078] =116°33′54″, β=123°26′06″.
[0079] In this embodiment, the investment casting sand box includes an outer support box 7 and an inner sand box 8. The outer support box 7 is positioned outside the inner sand box 8 to accommodate and support it. The inner sand box 8 is housed within the outer support box 7. A second clamping slot 71 is provided on the side of the outer support box 7. The inner sand box 8 contains a second ceramic mold shell 82, and the inner sand box 8, located outside the second ceramic mold shell 82, is filled with box sand 81. By using the outer support box 7, the inner sand box 8 can be replaced with different sized boxes within the maximum allowable size range of the outer support box 7, accommodating different mold shell size requirements. This embodiment has a wide range of applications, avoiding the problem of repeatedly changing devices due to different mold shell and box body sizes.
[0080] As can be seen from the above technical solution, the advantages and positive effects of the self-unhooking investment casting sand box transfer device of this utility model are as follows:
[0081] This utility model uses a heat insulation mechanism 2 to protect the hoisting mechanism 1, and automatically raises and lowers through a telescopic mechanism 3. It also uses a linkage locking mechanism 4 to safely and reliably hoist and release the investment casting sand box 6 or the outer tray 7, realizing automatic hoisting and automatic unhooking. This completely liberates workers from high-temperature working environments and improves the accuracy, stability and efficiency of investment casting sand box transfer.
[0082] Furthermore, in conjunction with the above specific embodiments, the self-detaching casting sand box transfer device of this utility model also has the following extended functions.
[0083] First, based on the working principle described above, it can be seen that the device in this embodiment cleverly utilizes the principle of rotation to achieve automatic gripping and placing of the investment casting sand box. It has a simple structure, is safe and reliable, is resistant to high temperatures, has a long service life, and greatly improves the working environment and labor intensity of workers.
[0084] Secondly, the device in this embodiment, through the reasonable design of the hook, ensures that the investment casting sand box 6 is only subjected to lifting force during the gripping process. While ensuring the stability of the box, it effectively prevents the deformation of the box and extends the service life of the sand box. The lifting process and horizontal movement of the sand box are jointly controlled by the variable frequency motor and the limit switch, which ensures precise position control and takes into account both the rotational stability and transfer efficiency of the sand box.
[0085] Finally, the device is equipped with a control system communication interface and is suitable for sandboxes and shells of different sizes, making it easy to achieve automation, digitization and intelligence.
[0086] Those skilled in the art to which this utility model pertains should understand that the specific structures and processes shown in the above detailed embodiments are merely exemplary and not restrictive. Furthermore, those skilled in the art can combine the various technical features described above in various possible ways to form new technical solutions or make other modifications, all of which fall within the scope of this utility model.
Claims
1. A self-unhooking investment casting box transfer device, applied to the transfer of an investment casting box, a clamping hole groove is arranged on the side surface of the investment casting box, characterized in that, The utility model provides a kind of movable heat insulation and lifting mechanism, including: Lifting mechanism, the lifting mechanism is mobile lifting, including wire rope; Thermal insulation mechanism, the thermal insulation mechanism includes insulation part, guide part and base, the insulation part covers the guide part and base, the guide part is installed in the base, can be moved up and down relative to the lifting mechanism, the upper portion of the base is provided with the wire rope; Expansion mechanism, the expansion mechanism includes connecting seat, support frame and telescopic frame, the upper portion of the telescopic frame is connected to the base, and the lower portion is slidably installed on the support frame, and the support frame is installed on the connecting seat; Connecting rod locking mechanism, the connecting rod locking mechanism is more than two sets, each set of connecting rod locking mechanism includes connecting rod and lock hook, the upper portion of the connecting rod is hinged to the side of the telescopic frame, the upper portion of the lock hook is hinged to the lower portion of the connecting rod, the middle portion of the lock hook is rotatably installed on the outside of the connecting seat, and the lower portion of the lock hook is inwardly protruding hook head.
2. The self-unhooking investment mold precision casting transfer device of claim 1, wherein: The lifting mechanism includes a crane and a trolley frame, the crane travels along the trolley frame, and the crane further includes a drive motor and a seat body, the drive motor drives the wire rope to be wound and released.
3. The self-unhooking investment mold precision casting transfer device of claim 2, wherein: The guide part includes a guide column, the seat body is provided with a guide hole, and the guide column is slidably provided in the guide hole.
4. The self-unhooking investment mold precision casting transfer device of claim 1, wherein: The expansion mechanism further includes a locking block, the locking block includes a head portion, a neck portion and a body portion, the head portion is a long strip structure, the outer dimension of the neck portion is the same as the width of the head portion, and is smaller than the length of the head portion, the size of the body portion is larger than that of the head portion and the neck portion, the side surface of the body portion is provided with a lug, the two ends of the neck portion are connected to the head portion and the body portion respectively, the hollow outer edge of the telescopic frame is provided with a sawtooth-shaped clamping groove, the support frame is provided with a baffle, the baffle is provided with a strip-shaped hole, the body portion is rotatably matched with the hollow portion, the lug is clamped in the sawtooth-shaped clamping groove, the length and width of the strip-shaped hole are matched with the length and width of the head portion respectively, and the head portion is adjusted up and down on the baffle; the sawtooth-shaped clamping groove drives the lug to rotate the body portion, and is respectively located in a first state and a second state, in the first state, the head portion can pass through the strip-shaped hole, and in the second state, the head portion cannot pass through the strip-shaped hole.
5. The self-unhooking investment mold precision casting transfer device of claim 4, wherein: The telescopic frame includes a side plate, and the side plate is provided with a first hinge shaft, and the position of the first hinge shaft is the same as the height of the low point of the sawtooth-shaped clamping groove.
6. The self-unhooking investment casting box transfer device of claim 1, wherein: The hinge center of the connecting rod and the telescopic frame is point A, the hinge center of the connecting rod and the hook is point B, the hinge center of the hook and the connecting seat is point C, the inner root of the hook head is point D, the distance between point A and point B is a, the distance between point B and point C is b, the distance between point C and point D is c, the distance between point A and the lifting center axis of the lifting mechanism is R A , the distance between point C and the lifting center axis of the lifting mechanism is R C , the distance between point D and the lifting center axis of the lifting mechanism is R D , the vertical distance between point D and point C is h, the angle between the line connecting point C and point D and the force surface of the hook head is α, the angle between the line connecting point B and point C and the line connecting point C and point D is β, and the above size and angle relationship satisfies: α = arctan((R C -R D ) / h) + 90°, β = arccos((R C -R A ) / (a+b)) + 180°-α.
7. The self-unhooking investment casting box transfer device of claim 1, wherein: The lower portion of the connecting seat is connected to three or more than three regular blocks arranged obliquely.
8. The self-unhooking investment casting box transfer device of claim 7, wherein: The regular blocks are arranged symmetrically along the lifting center axis of the lifting mechanism, and the inner side surface is an obliquely arranged plane.
9. The self-unhooking investment casting box transfer device of claim 1, wherein: The investment casting sand box includes an outer supporting box and an inner sand box, the inner sand box is accommodated in the outer supporting box, and the outer supporting box is provided with the clamping hole groove on the side surface.