An irregular product fixture with a covering partial paint spraying structure

Abstract

The application relates to the field of product paint spraying assistance, in particular to a special-shaped product jig with a partial paint spraying structure, which comprises an upper covering part and a lower covering part, the upper covering part and the lower covering part are used for placing a workpiece to be painted, a positioning structure is arranged between the upper covering part and the workpiece to be painted, the upper covering part is provided with a strip-shaped hole and a mounting rod which can be detachably connected with an external conveying mechanism, the lower covering part is provided with an insertion buckle, the insertion buckle is inserted into a through hole of the workpiece to be painted, then the insertion buckle is stretched out of the strip-shaped hole and is in clamping cooperation with the edge of the strip-shaped hole, so that the workpiece to be painted is locked. The jig can improve the efficient and high-precision paint spraying of the partial area of the special-shaped product, meet the demand of large-scale efficient and precise paint spraying, avoid the problems that manual glue pasting is time-consuming and labor-consuming, easy to appear missing and misplacement, and glue marks are not left, so that the overall appearance quality of the product is improved.

Description

Technical Field

[0001] This application relates to the field of product painting assistance, and in particular to a jig for irregularly shaped products with a structure for masking partial painting. Background Technology

[0002] A spray painting fixture is a specialized tooling device used in spray painting operations to fix and position workpieces and assist in controlling the spraying position, angle, and range. Made of metal, plastic, or wood, it possesses structural stability and resistance to paint mist corrosion. Its core function is to ensure the workpiece maintains an accurate posture during the spraying process, avoiding uneven spraying, missed areas, or contamination of non-spraying areas due to manual handling or improper placement, while improving spraying efficiency and consistency. A search reveals Chinese Patent Publication No. CN218308664U, which discloses a spray painting fixture and its usage method. During spray painting, the workpiece's rotation angle can be flexibly adjusted by holding a rotating handle, facilitating omnidirectional spraying and ensuring spraying quality. The workpiece is clamped using a threaded drive, which is simple to operate and allows for quick workpiece assembly and disassembly. It can also accommodate workpieces of various sizes, making it widely applicable. Other fixtures also use a threaded drive to clamp workpieces; this method is relatively simple to operate and can adapt to the clamping needs of workpieces of different sizes. However, when dealing with irregularly shaped workpieces where only certain areas require painting, while others are unpainted—for example, an irregularly shaped workpiece comprising a cylindrical section and multiple bends, with a through-hole in the center and a receiving groove at the bottom—only the sides, the bottom surface of the bends, and part of the top surface of such workpieces need painting. The industry commonly relies on applying adhesive to avoid painting these unpainted areas. Operators must manually apply adhesive to each piece to prevent paint contamination of non-painted areas. However, this method has significant drawbacks. In mass production, manual operation is not only time-consuming and labor-intensive but also prone to omissions and misalignments due to operator negligence, directly affecting painting accuracy and reducing the workpiece's appearance quality. Furthermore, adhesive residue may remain on the workpiece surface, further impacting the overall product appearance. Utility Model Content

[0003] In order to improve the efficiency and precision of painting certain areas of irregularly shaped products and meet the needs of large-scale, efficient, and precise painting, this application provides a fixture for irregularly shaped products with a masking structure for local painting.

[0004] This application provides a fixture for irregularly shaped products with a partial painting coverage structure, including an upper cover and a lower cover. The upper and lower cover are used to place the workpiece to be painted. A positioning structure is provided between the upper cover and the workpiece. The upper cover has a slotted hole and a mounting rod for detachable connection to an external conveying mechanism. The lower cover has a snap-fit ​​piece that passes through a through-hole in the workpiece and extends out of the slotted hole, engaging with the edge of the slotted hole to lock the workpiece in place. By adopting the above technical solution, the upper and lower cover can cover the workpiece, preventing non-painting areas from being contaminated by paint. Because of the positioning structure between the upper cover and the workpiece, the upper cover can be accurately placed on the workpiece, ensuring accurate coverage. The mounting rod on the upper cover can be detachably connected to an external conveying mechanism, facilitating the transport and use of the fixture between different processes and improving production efficiency. The snap-fit ​​piece of the lower cover passes through the through-hole of the workpiece to be painted and extends out into the strip-shaped hole, forming a snap-fit ​​with the edge of the strip-shaped hole. This locks the workpiece between the upper and lower cover pieces, preventing displacement during painting and ensuring painting accuracy and consistency. Compared to traditional adhesive application methods, this locking method avoids the time-consuming and labor-intensive nature of manual adhesive application, which is prone to missed areas and misalignments, and leaves no adhesive residue, thus improving the overall appearance quality of the product. Preferably, the end of the snap-fit ​​piece is provided with a hook portion, which snaps into the edge of the strip-shaped hole. By adopting the above technical solution, the insert clip passes through the through hole of the workpiece to be painted and extends out of the strip hole. Since the end of the insert clip is provided with a hook, when the insert clip extends out of the strip hole, the hook can engage with the edge of the strip hole. This engaging method can lock the workpiece to be painted, preventing displacement or shaking of the workpiece during painting and ensuring the accuracy and stability of the painting process. Preferably, the upper cover includes a first circular plate structure and a bent plate structure. The first circular plate structure has the strip hole and covers the top of the cylindrical area of ​​the workpiece to be painted. The top of the bent plate structure extends with the mounting rod and covers the top of the multiple bent areas of the workpiece to be painted. By adopting the above technical solution, the upper cover includes a first circular plate structure and a bent plate structure. The first circular plate structure covers the top of the cylindrical area of ​​the workpiece to be painted. Since the cylindrical area is part of an irregularly shaped workpiece and its top needs to be covered to prevent paint contamination, the first circular plate structure can specifically cover and protect the top of the cylindrical area. Meanwhile, the first circular plate structure has a strip-shaped hole, which is used to engage with the snap-fit ​​piece of the lower cover to lock the workpiece to be painted, thus fixing the position of the workpiece during the painting process. The bent plate structure covers the top of the multiple bent areas of the workpiece to be painted. The multiple bent areas have special shapes, and the bent plate structure can conform to their shapes to cover them, preventing the top of these areas from being painted.Furthermore, a mounting rod extends from the top of the bent plate structure. This mounting rod can be detachably connected to an external conveying mechanism, facilitating the overall movement and operation of the fixture, thereby improving the efficiency and convenience of the painting process. Preferably, the lower cover is a second circular plate structure, which covers the bottom of the cylindrical area of ​​the workpiece to be painted. By adopting the above technical solution, since the lower cover uses a second circular plate structure that can cover the bottom of the cylindrical area of ​​the workpiece to be painted, it can effectively block the bottom of the cylindrical area, which is not required to be painted, preventing paint from spraying onto this area during the painting process, thus preventing contamination of this area and ensuring the painting effect and appearance quality of the product. Preferably, a cylindrical structure extends vertically upward from the edge of the second circular plate structure, and the cylindrical structure extends into the receiving groove of the workpiece to be painted. By adopting the above technical solution, a cylindrical structure extends vertically upward from the edge of the second circular plate structure. When this cylindrical structure extends into the receiving groove of the workpiece to be painted, it can further define the relative position of the lower cover and the workpiece to be painted, allowing the lower cover to more accurately cover the bottom of the cylindrical area of ​​the workpiece to be painted, thereby better covering the area that does not need to be painted, avoiding paint contamination of that area, and improving the accuracy of painting and the appearance quality of the product. Preferably, a pull rod extends downward from the bottom of the second circular plate structure. By adopting the above technical solution, with a pull rod extending downward from the bottom of the second circular plate structure of the lower cover, when it is necessary to disassemble or replace the workpiece to be painted, the operator can more easily pull the pull rod, using the pulling force generated by the pull rod to separate the lower cover from the workpiece to be painted, thereby realizing convenient disassembly of the workpiece to be painted and improving the efficiency of workpiece replacement during the use of the fixture. Preferably, the positioning structure includes a positioning post, with the positioning post located on the side of the upper cover facing the workpiece to be painted, and the workpiece to be painted having a positioning hole into which the positioning post can be inserted. By adopting the above technical solution, since the upper cover has a positioning post on the side facing the workpiece to be painted, and the workpiece to be painted has a positioning hole into which the positioning post can be inserted, when the upper cover and the workpiece to be painted are engaged, the positioning post will be inserted into the positioning hole. This engagement method can restrict the relative movement of the upper cover and the workpiece to be painted in the horizontal direction, thereby achieving precise positioning of the upper cover and the workpiece to be painted, improving the accuracy of the fixture's workpiece positioning, and thus helping to ensure the precision and quality of the painting. Preferably, the positioning structure also includes a guide plate, with the guide plate located on the side of the upper cover facing the workpiece to be painted, and the workpiece to be painted having a guide gap into which the guide plate can be inserted.By adopting the above technical solution, since a guide plate is provided on the side of the upper cover facing the workpiece to be painted, and the workpiece to be painted has a guide gap into which the guide plate can be inserted, when assembling the fixture and the workpiece to be painted, the guide plate inserted into the guide gap can provide guidance for the positioning of the upper cover and the workpiece to be painted, enabling the upper cover to be positioned and fitted with the workpiece to be painted more accurately and smoothly, thus improving the accuracy and efficiency of assembly. Preferably, the upper cover is provided with a reinforcing rib structure. By adopting the above technical solution, since the upper cover is provided with a reinforcing rib structure, the reinforcing rib can disperse and bear the external force on the upper cover, enhancing the stability and rigidity of the structure, thereby improving the overall strength and durability of the upper cover and reducing the possibility of deformation or damage during use. Preferably, the diameter of the strip hole is set to just pass through the hook part of the snap fastener. By adopting the above technical solution, the diameter of the strip hole is set to just pass through the hook part of the snap fastener. In this way, during assembly, the snap fastener can pass smoothly through the strip hole. When the hook part at the end of the snap fastener reaches the edge of the strip hole, the hook part can accurately engage with the edge of the strip hole because the hole diameter matches the hook part, thus effectively locking the position of the snap fastener. This ensures that the workpiece to be painted is firmly locked between the upper and lower masking parts, preventing the workpiece from shifting during the painting process and improving the stability and accuracy of the painting operation.

[0005] In summary, this application includes at least one of the following beneficial technical effects: 1. Because the upper and lower cover parts cooperate, and the buckle of the lower cover part passes through the through hole of the workpiece to be painted and extends out of the strip hole of the upper cover part, and forms a snap-fit ​​with the edge of the strip hole, the workpiece is locked. The upper cover part is equipped with a mounting rod for connecting to the external conveying mechanism, which avoids the tedious operation of manually applying glue to each piece to avoid non-painting areas in the industry. It can be directly applied to the production line, thus improving production efficiency. 2. The positioning pin is inserted into the positioning hole of the workpiece to be painted, and the guide plate is inserted into the guide gap of the workpiece to be painted. This can position the workpiece and prevent it from shifting during the painting process, thereby improving the painting accuracy and ensuring the appearance quality of the workpiece. Attached Figure Description

[0006] Figure 1 This is an exploded view of the irregularly shaped product fixture with a partially painted covering structure, as shown in Example 1. Figure 2 This is an exploded view from another angle of the irregularly shaped product fixture with a partially painted structure as described in Example 1; Figure 3 This is a structural diagram of the irregular product fixture with a partial paint covering structure, as shown in Example 1.

[0007] Explanation of reference numerals in the attached drawings: 1. Upper cover; 2. Lower cover; 3. Workpiece to be painted; 11. First circular plate structure; 12. Bending plate structure; 111. Strip hole; 121. Mounting rod; 122. Positioning post; 123. Guide plate; 124. Reinforcing rib structure; 21. Second circular plate structure; 211. Insert buckle; 212. Cylindrical structure; 213. Tie rod; 2111. Hook and fastener part; 31. Cylindrical area; 32. Multi-section bending area; 33. Through hole; 34. Receiving groove; 35. Positioning hole; 36. Guide gap. Detailed Implementation

[0008] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0009] Example 1 This application provides an embodiment of a jig for irregularly shaped products with a partially spray-painted masking structure, referring to... Figure 1 It includes an upper cover 1 and a lower cover 2. The workpiece 3 to be painted can be placed between the upper cover 1 and the lower cover 2. The two work together to lock the workpiece 3 to be painted, preventing the workpiece from shaking during the painting process and improving the accuracy and quality of the painting.

[0010] Specifically, in this embodiment, the workpiece 3 to be painted includes a cylindrical area 31 and a multi-section bending area 32. The cylindrical area 31 has a through hole 33 in the middle and a receiving groove 34 communicating with the through hole 33 at the bottom. The entire side of the workpiece 3 to be painted, as well as the bottom surface and part of the top surface of the multi-section bending area 32, need to be painted.

[0011] Specifically, in this embodiment, the upper cover 1 includes a first circular plate structure 11 and a bent plate structure 12. The first circular plate structure 11 is circular in shape, with a strip-shaped hole 111 in its center. The bent plate structure 12 is provided with a mounting rod 121, a positioning structure, and a reinforcing rib structure 124. The strip-shaped hole 111 is for the insertion clip 211 of the lower cover 2 (mentioned below) to pass through. Its structural feature is that its length and width are designed according to the size of the insertion clip 211, which can prevent paint from entering the receiving groove 34 through the strip-shaped hole 111. The first circular plate structure 11 covers the top of the cylindrical area 31 of the workpiece 3 to be painted. Since the first circular plate structure 11 is in close contact with the top of the cylindrical area 31, when the painting operation is performed, the paint mist cannot pass through the first circular plate structure 11 to reach the top of the cylindrical area 31, thereby effectively preventing paint from being sprayed onto the parts of the cylindrical area 31 that do not need to be painted.

[0012] The bent plate structure 12 features a vertical mounting rod 121 extending from its top. The shape of the bent plate structure 12 is designed to match the top shape of the multi-segment bent area 32 of the workpiece 3 to be painted. The mounting rod 121 is cylindrical and made of the same plastic material as the bent plate structure 12. Its function is to detachably connect to the external conveying mechanism, facilitating the movement and operation of the fixture. The bent plate structure 12 covers the top of the multi-segment bent area 32 of the workpiece 3 to be painted. Its shape is adapted to the top shape of the multi-segment bent area 32, allowing it to fit snugly against the top of the multi-segment bent area 32. During the painting process, it blocks paint mist, preventing paint from being sprayed onto the unpainted parts of the top of the multi-segment bent area 32.

[0013] Reference Figure 2 and Figure 3 The upper cover 1 has a positioning structure on the side facing the workpiece 3 to be painted. This positioning structure includes a positioning post 122 and a guide plate 123. There are two guide plates 123, with the positioning post 122 located between them. Correspondingly, the workpiece 3 to be painted has a positioning hole 35 and a guide gap 36. The diameter and length of the positioning post 122 are determined according to the size of the positioning hole 35 on the workpiece 3. The positioning post 122 is inserted into the positioning hole 35 on the workpiece 3 to be painted, serving a positioning function to ensure the accurate relative position of the upper cover 1 and the workpiece 3. The guide plate 123 is a thin plate, and its shape is designed according to the guide gap 36 on the workpiece 3. The guide plate 123 is inserted into the guide gap 36 on the workpiece 3 to be painted, serving a guiding function to facilitate the accurate placement of the upper cover 1 on the workpiece 3. The positioning post 122 and the guide plate 123 cooperate with each other to enable the upper cover 1 to be positioned quickly and accurately with the workpiece 3 to be painted, ensuring that the upper cover 1 effectively covers the parts that do not need to be painted.

[0014] The upper cover 1 is further provided with a reinforcing rib structure 124 at its top. The reinforcing rib structure 124 is a long rectangular rib plate made of the same material as the upper cover 1. It can increase the strength and rigidity of the upper cover 1, prevent deformation during use, and improve the service life of the fixture. The reinforcing rib structure 124 is integrally formed with the upper cover.

[0015] Specifically, in this embodiment, the lower cover 2 includes a second circular plate structure 21, which is typically made of a plastic material similar to the upper cover 1. The second circular plate structure 21 covers the bottom of the cylindrical area 31 of the workpiece 3 to be painted, and the second circular plate structure 21 is in close contact with the bottom of the cylindrical area 31. During painting, it can prevent paint mist from entering the cylindrical area 31 from the bottom, thus preventing paint from being sprayed onto the parts of the cylindrical area 31 that do not need to be painted.

[0016] The second circular plate structure 21 has an integrally formed snap-fit ​​piece 211 at its top. The snap-fit ​​piece 211 is typically made of plastic and is made of the same material as the lower cover 2. The end of the snap-fit ​​piece 211 has a hook portion 2111, which is hook-shaped and serves to engage with the edge of the strip hole 111 to lock the workpiece 3 to be painted. The snap-fit ​​piece 211 passes through the through hole 33 of the workpiece 3 to be painted and then extends out of the strip hole 111. The diameter of the strip hole 111 is set so that the hook portion 2111 of the snap-fit ​​piece 211 can pass through it smoothly and engage.

[0017] The second circular plate structure 21 has a cylindrical structure 212 extending vertically upward from its edge. The cylindrical structure 212 is generally integrally formed with the second circular plate structure 21 and is made of the same material. The insert clip 211 is surrounded by the cylindrical structure 212, which extends into the receiving groove 34 of the workpiece 3 to be painted, further serving to position and cover it. The outer wall of the cylindrical structure 212 fits against the inner wall of the receiving groove 34, preventing paint mist from entering the receiving groove 34 and ensuring the stability of the workpiece 3 to be painted in the fixture.

[0018] The second circular plate structure 21 has a pull rod 213 extending downwards from its bottom. The pull rod 213 is cylindrical and made of metal. Its function is to facilitate the operator's operation of the lower cover 2, making it easy to install and remove the lower cover 2 from the upper cover 1. As an alternative feature, the pull rod 213 can also be other shapes such as a square rod.

[0019] The implementation principle of this embodiment is as follows: the fixture achieves accurate positioning through the cooperation of the upper cover 1 and the lower cover 2 using a positioning structure, and then locks the workpiece 3 to be painted by the snap-fit ​​engagement of the insert clip 211 and the strip hole 111. This avoids many drawbacks of traditional adhesive application methods, reduces manual operation time and effort, improves the accuracy and efficiency of painting, and also avoids the impact of adhesive residue on the product appearance. Moreover, the reinforcing rib structure 124 increases the strength and rigidity of the fixture, improving its service life. The pull rod 213 and the mounting rod 121 facilitate the operation and movement of the fixture, improving the overall quality and efficiency of partial painting of irregularly shaped products.

[0020] Example 2 The difference between this embodiment and the previous embodiment lies in the snap-fit ​​method of the lower cover 2's snap-fit ​​piece 211 and the strip hole 111. In this embodiment, the snap-fit ​​piece 211 does not have a hook part 2111, but is equipped with a magnet. The top of the upper cover 1 is embedded with a magnet that can form a magnetic attraction with the magnet of the snap-fit ​​piece 211. In this embodiment, the snap-fit ​​piece is tightly connected to the edge of the strip hole 111 by magnetic adsorption. When the snap-fit ​​piece 211 passes through the through hole 33 of the workpiece 3 to be painted and extends out of the strip hole 111, the magnet at the end of the snap-fit ​​piece 211 and the magnet at the edge of the strip hole 111 attract each other, thereby locking the workpiece 3 to be painted. This also ensures that the upper and lower cover pieces effectively cover the areas that do not need to be painted.

[0021] The implementation principle of this embodiment is as follows: This magnetic adsorption snap-fit ​​method can also achieve locking of the workpiece 3 to be painted, and it is more convenient and faster to install and disassemble. The operator only needs to pass the snap-fit ​​piece 211 through the strip hole 111, and the snap-fit ​​can be completed by using the magnetic adsorption force. Disassembly is also easy by overcoming the magnetic adsorption force. This reduces mechanical wear, improves the stability and reliability of the snap-fit, and further improves the efficiency and lifespan of the fixture.

[0022] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A jig for irregularly shaped products with a structure for partially covering paint spraying, characterized in that, The device includes an upper cover (1) and a lower cover (2). The upper cover (1) and the lower cover (2) are used to place the workpiece (3) to be painted. A positioning structure is provided between the upper cover (1) and the workpiece (3) to be painted. The upper cover (1) is provided with a strip hole (111) and a mounting rod (121) that can be detachably connected to an external conveying mechanism. The lower cover (2) is provided with a snap fastener (211). The snap fastener (211) passes through the through hole (33) of the workpiece (3) to be painted and extends out of the strip hole (111), and forms a snap-fit ​​with the edge of the strip hole (111) to lock the workpiece (3) to be painted.

2. The irregularly shaped product fixture with a partial paint-covering structure according to claim 1, characterized in that, The end of the buckle piece (211) is provided with a hook part (2111), which is engaged with the edge of the strip hole (111).

3. The irregularly shaped product fixture with a partial paint-covering structure according to claim 1, characterized in that, The upper cover (1) includes a first circular plate structure (11) and a bent plate structure (12). The first circular plate structure (11) has the strip hole (111) and covers the top of the cylindrical area (31) of the workpiece (3) to be painted. The top of the bent plate structure (12) is provided with the mounting rod (121) and covers the top of the multiple bent areas (32) of the workpiece (3) to be painted.

4. The irregularly shaped product fixture with a partial paint-covering structure according to claim 1, characterized in that, The lower cover (2) is a second circular plate structure (21), which covers the bottom of the cylindrical area (31) of the workpiece (3) to be painted.

5. The irregularly shaped product fixture with a partial paint-covering structure according to claim 4, characterized in that, The edge of the second circular plate structure (21) extends vertically upward and is provided with a cylindrical structure (212), which extends into the receiving groove (34) of the workpiece (3) to be painted.

6. The irregularly shaped product fixture with a partial paint-covering structure according to claim 5, characterized in that, The bottom of the second circular plate structure (21) is provided with a tie rod (213).

7. The irregularly shaped product fixture with a partial paint-covering structure according to claim 1, characterized in that, The positioning structure includes a positioning post (122), and the upper cover (1) is provided with the positioning post (122) on the side facing the workpiece (3) to be painted. The workpiece (3) to be painted is provided with a positioning hole (35) into which the positioning post (122) can be inserted.

8. The irregularly shaped product fixture with a partial paint-covering structure according to claim 7, characterized in that, The positioning structure also includes a guide plate (123). The upper cover (1) is provided with the guide plate (123) on the side facing the workpiece (3) to be painted. The workpiece (3) to be painted is provided with a guide gap (36) into which the guide plate (123) can be inserted.

9. The irregularly shaped product fixture with a partial paint-covering structure according to claim 1, characterized in that, The upper cover (1) is provided with a reinforcing rib structure (124).

10. The irregularly shaped product fixture with a partial paint-covering structure according to claim 2, characterized in that, The diameter of the strip hole (111) is set so that it just passes through the hook part (2111) of the buckle piece (211).

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