A tool for spray painting
By designing an expansion component for spray painting fixtures, the problem of poor positioning during spraying of small items was solved, enabling rapid installation and disassembly, and improving spraying efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO RONGJIN NEW MATERIALS CO LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-05-26
AI Technical Summary
Existing spray painting fixtures are prone to poor positioning when spraying small items, which affects product quality and results in serious material waste.
A spray painting fixture was designed, which uses a tube with multiple through holes spaced apart and a detachable expansion component. The expansion component includes a deformation body with local deformation and a deformation space. The inner hole of the part to be sprayed is positioned by the elastic tension of the expansion component, so as to achieve quick installation and disassembly.
It enables rapid installation and disassembly of items to be painted, supports batch preparation of parts to be painted, improves painting efficiency, ensures accurate positioning, and reduces material waste.
Smart Images
Figure CN224271644U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of spray painting, and more specifically to a spray painting tool. Background Technology
[0002] Spray painting is a coating technique widely used in industry, art, and everyday restoration. Its main purpose is to provide an aesthetically pleasing, protective, and durable coating to the surface of an object. Before spray painting, the surface of the item needs to be cleaned and treated. Then, the item is secured and placed in front of the spray painting equipment for spraying. After spraying, the item is removed.
[0003] In the painting process, tooling is typically used. Tooling can position workpieces by clamping, inserting, or storing them. When painting a large quantity of small items, creating a separate tooling for each product not only wastes materials but also easily leads to poor painting results at the positioned areas, affecting product quality. For example, when painting cosmetic bottles or small decorative parts with internal holes, there is a technical problem of clamping marks left on the outer surface of the product by the clamping tooling, which needs to be improved. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a spray painting fixture that enables the quick installation and removal of items to be painted.
[0005] The technical solution adopted by this utility model to solve its technical problem is: a spray painting fixture, which includes a tube body with multiple through holes spaced apart and an expansion assembly detachably connected to the tube body. The expansion assembly includes a deformation body with partial deformation and a deformation space located inside the deformation body. In the initial state, the maximum outer contour dimension of the deformation body is greater than the inner hole dimension of the part to be sprayed.
[0006] The expansion assembly is used to connect to the inner hole of the part to be sprayed, and the deformation body elastically tensions and positions the inner hole wall of the part to be sprayed.
[0007] The elastic contact area between the deformable body and the part to be coated is a cylindrical surface or a multi-point contact surface with intervals.
[0008] Optionally, the expansion assembly includes a first base, an expansion body is formed on the upper part of the first base, a plurality of expansion rings are formed on the outer wall of each expansion body, a deformation cavity is provided in the middle of the expansion body, the deformation cavity extends toward both ends, the expansion body constitutes a deformation body, and the deformation cavity constitutes a deformation space.
[0009] Optionally, the diameter of the head of the expansion body is larger than the diameter of the lower part.
[0010] Optionally, the outline diameter of the expansion ring located in the middle is larger than the outline diameter of the expansion rings on both sides.
[0011] Optionally, each expansion body has two extrusion columns formed on its inner wall, which are disposed within the deformation cavity.
[0012] Optionally, the lower part of the first base is a bolt passing through a through hole, and each first base is connected to a nut by the lower bolt. Each bolt is fitted with a washer, which is located between the nut and the tube.
[0013] Optionally, the tube body is a rectangular tube.
[0014] Optionally, the expansion assembly includes a second base and a top cap. The upper part of the second base is formed with a central shaft, and the upper part of the central shaft is provided with a threaded hole. The top cap is provided with a through central hole. The top cap is fixed by connecting the screw through the central hole to the threaded hole of the central shaft. The lower part of the top cap is formed with a plurality of expansion blades, and the ends of the expansion blades extend obliquely toward the periphery to form the deformation body.
[0015] Optionally, each cap has at least two expansion blades, with gaps between adjacent expansion blades.
[0016] Optionally, each cap and its corresponding expansion leaf are made of metal.
[0017] The advantages of this utility model for a spray painting fixture are: it enables the quick installation and removal of items to be painted; it enables the batch preparation of parts to be painted; it provides convenience for painting multiple parts; it enables the quick installation of multiple parts for painting and the simultaneous removal of painted parts, thus accelerating the standardization process of parts painting; and it enables the quick positioning of parts to be painted, thus speeding up the painting process. Attached Figure Description
[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.
[0019] Figure 1 This is a structural diagram of a tooling used for spray painting;
[0020] Figure 2 for Figure 1 The front view of the structure shown;
[0021] Figure 3 for Figure 1 Side view of the structure shown;
[0022] Figure 4 A schematic diagram of another structure of a spray painting fixture;
[0023] Figure 5 for Figure 4 The front view of the structure shown;
[0024] Figure 6 for Figure 4 Side view of the structure shown.
[0025] Diagram: Tube body 01, through hole 02, first base 11, expansion body 12, expansion ring 13, deformation cavity 14, extrusion column 15, second base 21, central shaft 22, top cap 23, expansion blade 24, screw 25, nut 31, washer 32. Detailed Implementation
[0026] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.
[0027] See details Figure 1 , Figure 2 , Figure 4 and Figure 5 Detailed examples of methods for quickly fixing multiple paintable parts for simultaneous painting:
[0028] The spray painting fixture includes a tube 01 with multiple through holes 02 spaced apart. Multiple expansion components are detachably connected to each through hole 02 of the tube 01. Each expansion component includes a partially deformable deformation body and a deformation space located inside the deformation body. The deformation body has an elastic deformation structure; under compressive force, it deforms towards the deformation space to achieve elastic deformation tension. In the initial state, the maximum outer contour dimension of the deformation body is larger than the inner hole dimension of the part to be sprayed. The expansion components are used to connect and fasten the inner hole of the part to be sprayed, and the deformation body elastically tensions and positions the inner hole wall of the part to be sprayed. The elastic contact points between the deformation body and the part to be sprayed are cylindrical surfaces or spaced multi-point contact surfaces.
[0029] Each expansion assembly elastically deforms and secures the part to be painted by inserting it into a hole in the part to be painted. The lower part of each expansion assembly is mounted on the tube body 01 by a nut 31, and a washer 32 is used between each nut 31 and the tube body 01. The number of expansion assemblies can be adjusted by disassembling and assembling them according to the number of parts to be painted, thus meeting the needs of different numbers of parts to be painted. The spacing between adjacent expansion assemblies can also be adjusted by disassembling and assembling them to meet the space requirements of parts of different volumes to be painted.
[0030] When installing the parts to be painted, align the holes of the parts with the expansion assembly, insert the expansion assembly into the holes of the parts, and the outer diameter of the expansion assembly is larger than the diameter of the holes of the parts. During the insertion process, the holes of the parts are stuck on the outer contour of the expansion assembly. By inserting multiple parts into the expansion assembly, and then directly installing the tube 01 on the painting equipment, multiple parts to be painted can be painted simultaneously.
[0031] After painting, tube 01 is removed directly, and then multiple painted parts are removed one by one. Tube 01 with multiple parts to be painted is directly replaced to proceed with the painting of the next batch of parts. The expansion component undergoes plastic deformation, and after the painted parts are removed, it can return to its original shape, ready for the next painting process. When the expansion component fails after long-term use, it can be replaced to ensure the fixation effect on the parts to be painted.
[0032] refer to Figure 3 and Figure 6 Detailed description of embodiments that facilitate the fixing of the expansion assembly:
[0033] The tube body 01 is a rectangular tube. The through hole 02 is set on two symmetrical planes on the rectangular tube, and the nut 31 and washer 32 can be tightened on the plane, which can more reliably fix multiple expansion components.
[0034] refer to Figure 1 , 2 3. Detailed embodiments for fixing multiple parts to be painted:
[0035] The expansion assembly includes a first base 11. The lower part of the first base 11 has a bolt passing through the through hole 02, and the upper part of the first base 11 is a regular hexagon, which facilitates the fixing of the upper part of the first base 11 with a tool when installing a nut 31 on the bolt at the lower part of the first base 11. Each first base 11 is connected to the nut 31 by the lower bolt, and each bolt is fitted with a washer 32, which is placed between the nut 31 and the tube body 01.
[0036] Each first base 11 has an expansion body 12 formed on its upper part. Multiple expansion rings 13 are formed on the outer wall of each expansion body 12. A deformation cavity 14 is provided in the middle of each expansion body 12. The expansion body 12 is shaped like a baseball bat, with its upper diameter larger than its lower diameter. When installing multiple parts to be painted, the holes of the parts to be painted are aligned with the expansion bodies 12, and the parts are fitted onto the expansion bodies 12. The multiple expansion rings 13 increase the friction between the holes of the parts to be painted and the expansion bodies 12. When the parts to be painted are fitted onto the expansion bodies 12, they are compressed, causing the expansion bodies 12 to elastically deform against the deformation cavity 14. The elastic force of the expansion bodies 12, which recovers its original shape through plastic deformation, supports and fixes the parts to be painted. After painting is completed, the tube 01 can be removed directly, and the parts to be painted can be removed from the expansion bodies 12 for the installation of the next batch of parts to be painted.
[0037] refer to Figure 3 Detailed embodiments for facilitating the insertion of the expander 12 into the hole of the part to be painted:
[0038] The expansion body 12 has a head diameter larger than its lower diameter, which facilitates the insertion of the rotary expansion body 12 into the hole of the part to be painted. The near-rotational expansion body 12 can be inserted into the hole more evenly, providing support from the hole of the part to be painted outwards, thereby fixing the part to be painted.
[0039] refer to Figure 3 Detailed embodiments for increasing the stability of parts to be painted;
[0040] The central expansion ring 13 on each expansion body 12 has a larger diameter than the expansion rings 13 at both ends, ensuring that the expansion rings 13 can be inserted into the holes of the part to be painted. The central expansion ring 13 provides support to the center of the hole in the part to be painted. The expansion ring 13 at the upper end of the expansion body 12 also provides auxiliary support. The spacing in the middle of the deformation cavities 14 is greater than the spacing at both ends, allowing the middle of the expansion body 12 to deform more and have greater elasticity, thus securing the part to be painted more firmly.
[0041] refer to Figure 2 Detailed embodiments for increasing the stability of parts to be painted;
[0042] Two extrusion pillars 15 are formed on the inner wall of each expansion body 12 and disposed within the deformation cavity 14. Thus, when each expansion body 12 is subjected to force and deforms towards the center, the deformation cavity 14 becomes smaller, and the two corresponding extrusion pillars 15 move closer to each other to compress. The lower parts of the two extrusion pillars 15 are closer together, resulting in a greater rebound force when compressed. This increases the resistance when the upper parts of the two extrusion pillars 15 move closer together, thereby enabling more thorough fixation of the parts to be painted for painting.
[0043] refer to Figure 1 , Figure 2 and Figure 3 Detailed explanation of an embodiment that ensures elastic deformation of the expansion body 12, expansion ring 13, and extrusion column 15 to fix the part to be painted:
[0044] The first substrate 11, the expansion body 12, the expansion ring 13, and the extrusion column 15 are all made of elastic material. This ensures that when installing parts to be painted, the expansion body 12, the expansion ring 13, and the extrusion column 15 can elastically deform to secure the parts. After painting, multiple painted parts can be removed and restored to their original state for the next stage of part securing.
[0045] refer to Figure 4 , Figure 5 and Figure 6 Detailed examples of fixing parts to be painted:
[0046] The expansion assembly includes a second base 21. The lower part of each second base 21 has a bolt passing through a through hole 02. Each second base 21 is connected to a nut 31 via the lower bolt. A washer 32 is fitted onto each bolt, positioned between the nut 31 and the tube body 01. A central shaft 22 is formed on the upper part of each second base 21. A threaded hole is provided on the upper part of each central shaft 22. A top cap 23 is fitted onto the upper part of each central shaft 22. A through hole is provided in the center of each top cap 23. Each top cap 23 is fixed by a screw 25 passing through the through hole and connecting to the threaded hole of the central shaft 22. Multiple expansion vanes 24 are formed on the lower part of each top cap 23.
[0047] The second base 21 can be disassembled by removing and installing nuts 31 and washers 32, thereby adjusting the number and spacing of expansion components according to the number and volume of the parts to be painted. The holes of the parts to be painted are aligned with the top cap 23 and fitted onto the multiple expansion blades 24. The distance between the side of each expansion blade 24 away from the top cap 23 and the axis of the central shaft 22 is greater than the distance between the side of each expansion blade 24 closer to the top cap 23 and the axis of the central shaft 22. As the holes of the parts to be painted are inserted into the top cap 23 and the multiple expansion blades 24, the lower parts of the multiple expansion blades 24 undergo greater deformation. The lower parts of the multiple expansion blades 24 support the holes of the parts to be painted, thereby fixing the parts to be painted.
[0048] Adjusting the inclination slope of the multiple expansion blades 24 adjusts the bending amplitude of the expansion blades 24 when they are inserted into the holes of the part to be painted, thereby adjusting the elastic force of the multiple expansion blades 24 in fixing the part to be painted, and thus enhancing the fixation performance of the part to be painted. The structure of multiple expansion blades 24 can only be used for parts to be painted with holes of the same diameter, and cannot meet the fixing requirements of parts to be painted with stepped holes of varying diameters.
[0049] To further optimize the fixing effect of the expansion blade 24, the lower end of the expansion blade 24 can be designed as a curled arc shape. This will prevent interference when removing the parts to be painted when encountering stepped holes, and allow the parts to be smoothly removed by being guided through the curled part of the expansion blade 24.
[0050] refer to Figure 6 Detailed embodiments for ensuring the stability of the painted parts secured by multiple expansion blades 24:
[0051] Each top cap 23 has at least two expansion blades 24, with gaps between adjacent expansion blades 24. This design of multiple expansion blades 24 ensures distributed support for the internal structure of the holes on the workpiece to be painted from multiple directions. The gaps between adjacent expansion blades 24 provide ample deformation space, preventing interference between deformed blades and ensuring effective support for the workpiece. Even if a single expansion blade 24 undergoes deformation beyond normal limits, it can be manually reset to repair itself, ensuring continued support for each workpiece. Furthermore, if an expansion blade 24 is completely damaged, the top cap 23 and all the integrated expansion blades 24 can be replaced by unscrewing the screws 25, effectively saving on the second base 21, central shaft 22, and screws 25, thus reducing costs.
[0052] refer to Figure 6 An example detailing the supporting effect of the expansion blade 24:
[0053] Each cap 23 and its corresponding expansion leaf 24 are made of metal and are made of elastic metal material. After elastic deformation, they can automatically reset, thereby ensuring that the parts to be painted are positioned while the complex process of shrinking through the insertion hole is carried out. They can also be removed after painting in preparation for the next painting process.
[0054] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.
Claims
1. A tooling for spray painting, characterized in that: The spray painting fixture includes a tube (01) with multiple through holes (02) spaced apart and an expansion assembly detachably connected to the tube (01). The expansion assembly includes a deformation body with partial deformation and a deformation space located inside the deformation body. In the initial state, the maximum outer contour dimension of the deformation body is greater than the inner hole dimension of the part to be sprayed. The expansion assembly is used to connect to the inner hole of the part to be sprayed, and the deformation body elastically tensions and positions the inner hole wall of the part to be sprayed. The elastic contact area between the deformable body and the part to be coated is a cylindrical surface or a multi-point contact surface with intervals.
2. The spray painting fixture according to claim 1, characterized in that: The expansion assembly includes a first base (11), an expansion body (12) is formed on the upper part of the first base (11), a plurality of expansion rings (13) are formed on the outer wall of each expansion body (12), a deformation cavity (14) is provided in the middle of the expansion body (12), the deformation cavity (14) extends toward both ends, the expansion body (12) constitutes the deformation body, and the deformation cavity (14) constitutes the deformation space.
3. The spray painting fixture according to claim 2, characterized in that: The diameter of the head of the expansion body (12) is larger than the diameter of the lower part.
4. The spray painting fixture according to claim 2, characterized in that: The outline diameter of the expansion ring (13) located in the middle is larger than the outline diameter of the expansion rings (13) on both sides.
5. The spray painting fixture according to claim 2, characterized in that: Two extrusion columns (15) are formed on the inner wall of each expansion body (12) and disposed in the deformation cavity (14).
6. The spray painting fixture according to claim 2, characterized in that: The lower part of the first base (11) is a bolt that passes through the through hole (02). Each first base (11) is connected to a nut (31) by the lower bolt. Each bolt is fitted with a washer (32), which is located between the nut (31) and the tube (01).
7. The spray painting fixture according to claim 1, characterized in that: The tube body (01) is a rectangular tube.
8. The spray painting fixture according to claim 1, characterized in that: The expansion assembly includes a second base (21) and a top cap (23). The upper part of the second base (21) is formed with a central shaft (22). The upper part of the central shaft (22) is provided with a threaded hole. The top cap (23) is provided with a through central hole. The top cap (23) is fixed by connecting the screw (25) through the central hole to the threaded hole of the central shaft (22). The lower part of the top cap (23) is formed with a plurality of expansion blades (24). The ends of the expansion blades (24) extend obliquely toward the periphery to form the deformation body.
9. A spray painting fixture according to claim 8, characterized in that: The number of expansion blades (24) on each cap (23) is at least two, and a gap is provided between adjacent expansion blades (24).
10. A spray painting fixture according to claim 8, characterized in that: Each of the top caps (23) and the corresponding expansion leaf (24) is made of metal.