Hot core sand core dip-coating device
By designing a hot core sand core dip coating device with a rotating assembly, it can be rotated and shaken in the dip coating pool by changing angles, which solves the problem that the prior art is difficult to fully coat the hot core sand core in a complex shape, and achieves a more efficient dip coating effect.
Patent Information
- Application Number
- CN202510252480.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2025-06-13
AI Technical Summary
The existing dip coating device is difficult to fully coat the hot core sand core with complex shapes, and defects such as sand sticking and pores are prone to occur.
A hot core sand core dip coating device is designed, and the mounting rack is driven to change angles and rotate and shake in the dip coating pool through a rotating assembly, so that the dip coating liquid can fully cover all the details of the sand core.
It effectively prevents defects such as sand sticking and pores during casting, and improves the dip coating efficiency of hot core sand core.
Smart Images
Figure CN120133457A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of dip coating devices, and specifically refers to a hot core sand core dip coating device. Background Art
[0002] A hot core sand core made of hot core sand is a core used in casting production to form the inner cavity and hole shape of a casting. The surface of the hot core sand core is usually relatively rough. Dipping can cover the surface of the sand core with a dipping liquid, thereby obtaining a smooth surface. When producing automotive engine block castings, smooth cooling water channels and oil passage inner cavities (formed by hot core sand cores) can reduce the resistance of liquid flow, improve the performance of the engine, and fill the tiny pores and defects on the surface of the sand core.
[0003] Existing dip coating devices often vertically immerse the hot core sand core in the dipping liquid. However, for hot core sand cores with complex shapes, multiple curved surfaces, concave or convex parts, such as the engine block sand core with internal cooling channels, vertical dipping cannot fully coat the sand core, and defects such as sand sticking and gas holes are likely to occur during the casting process. Summary of the Invention
[0004] In view of the above situation, to overcome the defects of the prior art, the present invention provides a hot core sand core dip coating device, which at least partially solves the problems raised in the above background art.
[0005] The technical solution adopted by the present invention is as follows: A hot core sand core dip coating device, comprising: A hanging rack, including a space for placing the hot core sand core; A rotating assembly, provided at the upper end of the hanging rack, including a mounting plate, a rotating motor, an eccentric disk, a rotating bracket, a movable rod, a connecting column, and a driving shaft; Wherein, the lower surface of the mounting plate is fixedly connected to the upper end of the hanging rack, and the connecting column is located at the upper end of the mounting plate and fixedly connected to the upper surface of the mounting plate; the rotating bracket has a circular frame structure and is sleeved outside the connecting column. The movable rod is movably penetrated along a direction perpendicular to the axis of the connecting column, and both ends are movably arranged on the front and rear ends of the rotating bracket; the eccentric disk is provided at the output shaft end of the rotating motor, one end of the driving shaft is fixedly arranged on the eccentric disk, and a circular hole is provided at the upper end of the connecting column, and the other end of the driving shaft is rotatably arranged in the circular hole; A fixed disk, the rotating motor is fixedly arranged on the fixed disk, and two fixing plates are provided in the downward extending direction of the fixed disk. The two fixing plates are arranged opposite to each other along the axis of the fixed disk, and a hanging rod facing the axis of the fixed disk is provided on the inner wall of each fixing plate. The left and right ends of the rotating bracket are respectively rotatably arranged on the hanging rods through bearings.
[0006] In a further embodiment, the drive shaft is an inclined shaft, and the lower end of the drive shaft is inclined 65° in the axial direction of the output end of the rotary motor.
[0007] In a further embodiment, the rotating bracket is made of a rigid material with a rounded square shape.
[0008] Furthermore, the hanging mount includes a bottom frame, connecting rods, and a hanging plate. There are four groups of connecting rods, and the four groups of connecting rods are fixedly arranged on the edge of the bottom frame. The hanging plate is fixedly arranged at the upper end of the connecting rods. The connecting column is arranged on the upper wall of the hanging plate through a mounting plate. A cross-shaped bracket is arranged inside the bottom frame, and a placing pad is arranged above the cross-shaped bracket for placing the hot core sand core.
[0009] In a further embodiment, a positioning column is arranged at the center of the cross-shaped bracket, and the positioning column penetrates through the placing pad.
[0010] In a further embodiment, the placing pad is a plain weave mat. The plain weave mat is composed of several groups of warp threads and weft threads that are equally spaced and intertwined with each other. The distance between adjacent warp threads of the plain weave mats is 2 - 4 mm, and the distance between adjacent weft threads of the plain weave mats is 2 - 4 mm.
[0011] In a further embodiment, the inner wall of the edge of the bottom frame is arranged in a sloped shape.
[0012] Furthermore, the hot core sand core dipping device further includes a base, a support frame, and a hydraulic rod. The support frame is fixedly arranged on the base in an inverted L shape. The fixed end of the hydraulic rod is arranged on the support frame, and the fixed disk is arranged at the movable end of the hydraulic rod.
[0013] The beneficial effects achieved by the present invention with the above structure are as follows: The output shaft end of the rotary motor drives the drive shaft on the eccentric disk to rotate slowly. The drive shaft cooperates with the round hole to drive the connecting column to swing around the output shaft end of the rotary motor. Since the movable rod movably penetrates the connecting column from the front and rear ends, affected by the limit of the movable rod, the connecting column will drive the hanging mount to swing in the left - right direction; at the same time, the connecting column drives the left and right ends of the rotating bracket to rotate on the hanging rod through the movable rod, thereby driving the connecting column to swing in the front - rear direction, so as to realize the rotational swing of the whole connecting column, and then continuously adjust the dipping angle of the hot core sand core in the hanging mount, so that the dipping liquid can fully cover all the detailed parts of the sand core, and positions such as narrow channels and corners can be coated, effectively avoiding quality problems caused by incomplete local coating, and at the same time reducing the time consumed for ensuring the coating effect by multiple adjustments or repeated dipping, thus improving the overall dipping efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1Schematic three - dimensional structure diagram of the hot core sand core dipping device proposed by the embodiments of the present invention; Figure 2 Front view of the hot core sand core dipping device proposed by the embodiments of the present invention; Figure 3 Right view of the hot core sand core dipping device proposed by the embodiments of the present invention Figure 4 For the embodiments of the present invention Figure 1 Enlarged view at position A in the embodiments; Figure 5 Schematic structure diagram of the hanging rack proposed by the embodiments of the present invention; Figure 6 Schematic structure diagram of the placement pad proposed by the embodiments of the present invention; Figure 7 Schematic structure diagram of the bottom frame proposed by the embodiments of the present invention.
[0015] Among them, 1. Support frame, 2. Hydraulic rod, 3. Fixed disk, 4. Rotating assembly, 5. Hanging rack, 6. Fixed plate, 7. Hanging rod, 8. Rotating motor, 9. Eccentric disk, 10. Rotating support, 11. Movable rod, 12. Connecting column, 13. Driving shaft, 14. Mounting plate, 15. Round hole, 16. Bottom frame, 17. Connecting rod, 18. Hanging plate, 19. Cross support, 20. Placement pad, 21. Positioning column, 22. Warp strip, 23. Weft strip, 24. Base.
[0016] The accompanying drawings are used to provide further understanding of the embodiments and constitute a part of the specification. They are used in conjunction with the embodiments to explain, but do not constitute a limitation to the embodiments. Detailed implementation manners
[0017] Next, the technical solutions in the embodiments will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection.
[0018] In the description of the embodiments, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the embodiments.
[0019] Existing dip coating devices often vertically immerse hot core sand cores into the dip coating liquid. However, for hot core sand cores with complex shapes, multiple curved surfaces, recessed or protruding parts, such as engine block sand cores with internal cooling channels, vertical dip coating cannot fully coat the sand cores, and defects such as sand sticking and gas pores are likely to occur during the casting process.
[0020] After recognizing the above problems, the present application proposes and discloses a dip coating device for hot core sand cores. By dipping at a variable angle, it ensures that the dip coating liquid enters these narrow channels and corners, enabling all the detailed parts of the sand core to be fully coated, thereby effectively preventing defects such as sand sticking and gas pores during the casting process and improving the dip coating efficiency of hot core sand cores.
[0021] As Figure 1 、 Figure 2 、 Figure 3 and Figure 4 shown, an embodiment of the present disclosure provides a dip coating device for hot core sand cores, including: A hanging rack 5, including a space for placing a hot core sand core; A rotating assembly 4, provided at the upper end of the hanging rack 5, including a mounting plate 14, a rotating motor 8, an eccentric disk 9, a rotating bracket 10, a movable rod 11, a connecting column 12, and a driving shaft 13; Among them, the lower surface of the mounting plate 14 is fixedly connected to the upper end of the hanging rack 5, and the connecting column 12 is located at the upper end of the mounting plate 14 and fixedly connected to the upper surface of the mounting plate 14; the rotating bracket 10 has a circular frame structure and is sleeved outside the connecting column 12. The movable rod 11 is movably penetrated along a direction perpendicular to the axis of the connecting column 12, and both ends are movably provided at the front and rear ends of the rotating bracket 10; the eccentric disk 9 is provided at the output shaft end of the rotating motor 8, one end of the driving shaft 13 is fixedly provided on the eccentric disk 9, and a circular hole 15 is provided at the upper end of the connecting column 12, and the other end of the driving shaft 13 is rotatably provided in the circular hole 15; A fixed disk 3, the rotating motor 8 is fixedly provided on the fixed disk 3. Two fixing plates 6 are provided in the downward extending direction of the fixed disk 3. The two fixing plates 6 are arranged opposite to each other along the axis of the fixed disk 3. Hanging rods 7 facing the axis of the fixed disk 3 are provided on the inner walls of the fixing plates 6. The left and right ends of the rotating bracket 10 are respectively movably provided on the hanging rods 7 through bearings.
[0022] In this embodiment, the hot core sand core to be dip coated is placed at the central position of the hanging rack 5. The movable end of the hydraulic rod 2 drives the fixed disk 3 to descend, sending the hanging rack 5 into the dip coating pool below. The rotating assembly 4 rotates and swings, driving the hanging rack 5 to rotate and shake at a variable angle in the dip coating pool, enabling the dip coating liquid to enter the narrow channels and corners of the hot core sand core, so that all the detailed parts of the sand core can be fully coated, thereby effectively preventing defects such as sand sticking and gas pores during the casting process.
[0023] After dip coating is completed, the movable end of the hydraulic rod 2 drives the fixed disk 3 to rise, pulling the hanging rack 5 out of the lower dip coating pool, and removing the dip-coated hot core sand core for draining.
[0024] As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, the rotating assembly 4 includes a rotating motor 8, an eccentric disk 9, a rotating bracket 10, a movable rod 11, a connecting column 12, a drive shaft 13, and a mounting plate 14. The rotating motor 8 is fixedly arranged on the fixed disk 3. The eccentric disk 9 is arranged at the output shaft end of the rotating motor 8. One end of the drive shaft 13 is fixedly arranged on the eccentric disk 9. The left and right ends of the rotating bracket 10 are respectively movably arranged on the hanging rod 7 through bearings. The two ends of the movable rod 11 are movably arranged on the front and rear ends of the rotating bracket 10. The connecting column 12 is arranged through the inside of the rotating bracket 10 and the connecting column 12 is arranged below the rotating motor 8. The movable rod 11 movably penetrates through the connecting column 12. A circular hole 15 is arranged at the upper end of the connecting column 12. The other end of the drive shaft 13 is rotatably arranged in the circular hole 15. The mounting plate 14 is arranged at the lower end of the connecting column 12. The connecting column 12 is arranged on the upper end of the hanging rack 5 through the mounting plate 14.
[0025] In this embodiment, when the output shaft end of the rotating motor 8 drives the eccentric disk 9 to rotate, the eccentric disk 9 drives the drive shaft 13 to rotate slowly. The cooperation between the drive shaft 13 and the circular hole 15 drives the connecting column 12 to swing around the output shaft end of the rotating motor 8. Since the movable rod 11 movably penetrates through the connecting column 12 from the front and rear ends, affected by the limitation of the movable rod 11, the connecting column 12 will drive the hanging rack 5 to swing in the left and right directions. At the same time, the connecting column 12 drives the left and right ends of the rotating bracket 10 to rotate on the hanging rod 7 through the movable rod 11, thereby driving the connecting column 12 to swing in the front and rear end directions, and then realizing the overall rotational swing of the connecting column 12, and continuously adjusting the dip coating angle of the hot core sand core in the hanging rack 5, so that all details of the sand core can be fully coated, improving the dip coating efficiency.
[0026] It should be noted that the drive shaft 13 is an inclined shaft, and the lower end of the drive shaft 13 is inclined 65° towards the axis direction of the output end of the rotating motor 8.
[0027] In this embodiment, when the output shaft end of the rotating motor 8 rotates through the eccentric disk 9, the eccentric disk 9 drives the drive shaft 13 to rotate. At this time, the rotation angle of the upper end of the drive shaft 13 is 65°, and the rotation angle of the lower end of the drive shaft 13 driving the connecting column 12 to rotate around the output shaft end of the rotating motor 8 through the circular hole 15 is 25°, that is, the angle of the connecting column 12 driving the hanging rack 5 to shake up and down is 25°, so as to meet the dip coating angle of the hot core sand core in the hanging rack 5 and prevent the hot core sand core from falling from the hanging rack 5 due to too large a shaking amplitude.
[0028] As Figure 4As shown, the rotating bracket 10 is made of rigid material in the shape of a rounded square.
[0029] In this embodiment, since the connecting column 12 is hung on the front and rear ends of the rotating bracket 10 through the sliding rod, and the two ends of the rotating bracket 10 are respectively movably hung on the hanging rod 7 through bearings, the rotating bracket 10 is subject to greater force. The rounded square frame can make the force transmission smoother, and the force lines can be distributed along a more natural curve, thereby enhancing the bearing capacity of the overall frame of the rotating bracket 10 and reducing the risk of damage to the rotating bracket 10 due to excessive corner stress.
[0030] As Figure 1 , Figure 5 , Figure 6 and Figure 7 As shown, the hanging frame 5 includes a bottom frame 16, a connecting rod 17 and a hanging plate 18. There are four groups of connecting rods 17, and the four groups of connecting rods 17 are fixedly arranged on the edge of the bottom frame 16. The hanging plate 18 is fixedly arranged at the upper end of the connecting rod 17. The connecting column 12 is arranged on the upper wall of the hanging plate 18 through the mounting plate 14. A cross bracket 19 is arranged in the bottom frame 16, and a placing pad 20 is arranged above the cross bracket 19 for placing hot core sand cores.
[0031] As Figure 5 , Figure 6 and Figure 7 As shown, a positioning column 21 is arranged at the center of the cross bracket 19, and the positioning column 21 penetrates through the placing pad 20.
[0032] In this embodiment, the position of the sand core can be fixed through the positioning column 21. During dip coating, the positioning column 21 is inserted into the reserved hole of the sand core, and the sand core is located on the positioning column 21 at the center of the cross. The centrifugal force generated by the rotation of the hanging frame 5 is zero, thereby helping the sand core to maintain a stable posture and improving the quality of dip coating.
[0033] As Figure 6 As shown, the placing pad 20 is a plain weave mat. The plain weave mat is composed of several groups of warp threads 22 and weft threads 23 that are equally spaced and interwoven with each other. The distance between adjacent warp threads 22 of two adjacent plain weave mats is 2 - 4 mm, and the distance between adjacent weft threads 23 of two adjacent plain weave mats is 2 - 4 mm.
[0034] In this embodiment, since the interval between the warp threads 22 and the weft threads 23 of the plain weave mat is 2 to 4 mm, rectangular holes with an area of 4 to 16 mm² are formed between two adjacent groups of warp threads 22 and weft threads 23 on the plain weave mat. When the hanging rack 5 sinks into the dip coating pool, the bottom frame 16 first contacts the dip coating liquid, and then the dip coating liquid submerges the placement mat 20 through the holes formed between the warp threads 22 and the weft threads 23 of the plain weave mat, and dip coats the hot core sand core from bottom to top. Since the surface of the plain weave mat is uneven, the dip coating liquid can quickly pass through the gap between the bottom of the sand core and the plain weave mat, fully dip coat the bottom of the sand core, and improve the dip coating efficiency.
[0035] When the hanging rack 5 rises from the dip coating pool, the dip coating liquid can quickly flow back into the dip coating pool through the holes and gaps of the plain weave mat, facilitating the quick draining of the hot core sand core and reducing the waste of the dip coating liquid.
[0036] Such as Figure 5 、 Figure 6 and Figure 7 shown, the inner wall of the edge of the bottom frame 16 is arranged in a slope shape.
[0037] In this embodiment, the sloped edge can play a role in protecting the hot core sand core, preventing the unsecured hot core sand core from slipping off the edge of the bottom frame 16 when the hanging rack 5 rotates.
[0038] In this embodiment, when the bottom frame 16 rises from the liquid level of the dip coating liquid, the dip coating liquid above the bottom frame 16 rushes into the placement mat 20 along the sloped edge, flushing the bottom of the hot core sand core to prevent debris adhesion in the dip coating liquid.
[0039] Such as Figure 1 、 Figure 2 and Figure 3 shown, the hot core sand core dip coating device further includes a base 24, a support frame 1 and a hydraulic rod 2. The support frame 1 is fixedly arranged on the base 24 in an inverted L shape. The fixed end of the hydraulic rod 2 is arranged on the support frame 1, and the fixed disk 3 is arranged at the movable end of the hydraulic rod 2.
[0040] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprises", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such process, method, article or device.
[0041] Although the embodiments have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit. The scope of the present embodiments is defined by the appended claims and their equivalents.
[0042] The above describes the embodiments, and such description is not restrictive. What is shown in the drawings is only one of the embodiments, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and, without departing from the purpose of creation, design structures and embodiments similar to the technical solution without creative efforts, they shall fall within the scope of protection.
Claims
1. A hot core sand core dipping device, characterized in that: include: The mounting frame (5) comprises a space for placing the hot core sand core; A rotating assembly (4) is arranged at the upper end of the mounting frame (5), comprising a mounting plate (14), a rotating motor (8), an eccentric disk (9), a rotating bracket (10), a movable rod (11), a connecting column (12) and a driving shaft (13); The lower surface of the mounting plate (14) is fixedly connected to the upper end of the mounting frame (5); the connecting column (12) is located at the upper end of the mounting plate (14) and is fixedly connected to the upper surface of the mounting plate (14); the rotating bracket (10) is a circular frame structure, which is sleeved on the outside of the connecting column (12); the movable rod (11) is movably arranged to penetrate along a direction perpendicular to the axis of the connecting column (12), and both ends are movably arranged on the front and rear ends of the rotating bracket (10); the eccentric disk (9) is arranged at the output shaft end of the rotating motor (8), one end of the driving shaft (13) is fixedly arranged on the eccentric disk (9), and a circular hole (15) is arranged at the upper end of the connecting column (12), and the other end of the driving shaft (13) is rotatably arranged in the circular hole (15); A fixed disk (3), the rotating motor (8) is fixedly mounted on the fixed disk (3), two fixed plates (6) are arranged in the direction in which the fixed disk (3) extends downward, the two fixed plates (6) are arranged opposite to each other along the axis of the fixed disk (3), the inner wall of each fixed plate (6) is provided with a hanging rod (7) facing the axis of the fixed disk (3), and the left and right ends of the rotating bracket (10) are respectively movably mounted on the hanging rod (7) through bearings.
2. The hot core sand core dipping device according to claim 1, characterized in that: The drive shaft (13) is an oblique shaft, and the lower end of the drive shaft (13) is inclined by 65 degrees toward the axis direction of the output end of the rotating motor (8).
3. The hot core sand core dipping device according to claim 1, characterized in that: The rotating bracket (10) is a rounded square made of a rigid material.
4. The hot core sand core dipping device according to claim 1, characterized in that: The mounting frame (5) comprises a bottom frame (16), connecting rods (17) and a hanging plate (18). The connecting rods (17) are provided in four groups. The four groups of connecting rods (17) are fixedly arranged at the edge of the bottom frame (16). The hanging plate (18) is fixedly arranged at the upper end of the connecting rods (17). The connecting column (12) is arranged on the upper wall of the hanging plate (18) through the mounting plate (14). A cross bracket (19) is provided in the bottom frame (16). A placement pad (20) is provided above the cross bracket (19) for placing a hot core sand core.
5. The hot core sand core dipping device according to claim 4, characterized in that: A positioning column (21) is provided at the center of the cross bracket (19), and the positioning column (21) is arranged to penetrate the placement pad (20).
6. The hot core sand core dipping device according to claim 5, characterized in that: The placement pad (20) is a plain woven pad, which is composed of a plurality of groups of warp strips (22) and weft strips (23) that are equally spaced and interwoven with each other, and the distance between the warp strips (22) of two adjacent groups of the plain woven pads is 2 to 4 mm, and the distance between the weft strips (23) of two adjacent groups of the plain woven pads is 2 to 4 mm.
7. The hot core sand core dipping device according to claim 4, characterized in that: The inner wall of the edge of the bottom frame (16) is arranged in a sloped shape.
8. The hot core sand core dipping device according to claim 1, characterized in that: The hot core sand core dipping device further comprises a base (24), a support frame (1) and a hydraulic rod (2); the support frame (1) is fixedly arranged on the base (24) in an inverted L shape; the fixed end of the hydraulic rod (2) is arranged on the support frame (1); and the fixed plate (3) is arranged on the movable end of the hydraulic rod (2).