A paint spraying shielding jig for automobile plastic parts
By designing the masking sleeve and supporting protrusion structure of the masking fixture, the problem of accidental spraying on the back of the control button pressing part was solved, achieving efficient and precise painting effect and meeting the high-quality production requirements of automotive parts.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI BAOLING PLASTICS CO LTD
- Filing Date
- 2025-08-25
- Publication Date
- 2026-07-21
AI Technical Summary
In the prior art, the back of the pressing part of the control button is prone to accidental spraying during the painting process, which leads to poor subsequent assembly. Moreover, existing protective measures such as pasting protective stickers and manual wrapping are not tight enough to meet the requirements of high-quality production.
Design a masking fixture for painting automotive plastic parts, including a masking sleeve, insert pins and snap-fit feet inserted into the inner cavity of the sleeve, the lower end face of the pressing part abutting against the upper end face of the sleeve, and the gap is adjusted by the support protrusion and studs to ensure that the back of the pressing part is not accidentally sprayed, while providing positioning and convenient operation.
It effectively prevents accidental spraying on the back of the pressing part, improves paint spraying accuracy, reduces the risk of adhesion after painting, improves painting efficiency and quality, and meets the high-quality requirements of automotive parts production.
Smart Images
Figure CN224525037U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of automotive plastic parts processing technology, and in particular to a masking fixture for painting automotive plastic parts. Background Technology
[0002] In the manufacturing of automotive parts, such as control buttons, refer to... Figure 5 The control buttons are typically made of plastic and include a pressing part 10, a post 20 integrally molded and fixed to the lower end face of the pressing part 10, and a latching foot 30 integrally molded and fixed to the lower end face of the pressing part 10. At least two latching feet 30 are provided. After the control buttons are injection molded, only the top and outer peripheral surfaces of the pressing part need to be painted, and then a marking is engraved onto the top surface using a laser process.
[0003] When painting control buttons, if paint spots accidentally appear on the back of the pressing part, it can easily affect the subsequent assembly of the control buttons. Therefore, in order to achieve painting of specific areas, one approach is to use some adhesive protective stickers to stick them on the non-painted areas of the plastic parts for protection. However, the protective stickers may fail to protect the parts due to poor adhesion, and cannot effectively prevent accidental spraying on the back of the pressing part. The second approach is to use simple paper or plastic film for manual wrapping. Operators rely on experience to wrap the parts that need protection to prevent paint from spraying onto places that should not be painted. However, it is difficult to ensure the tightness and accuracy of the wrapping with paper or plastic film, which cannot meet the high-quality requirements of automotive parts manufacturing. Therefore, further improvement is needed. Utility Model Content
[0004] To effectively prevent accidental spraying from the back of the pressing part, this application provides a masking fixture for painting automotive plastic parts.
[0005] This application provides a masking fixture for painting automotive plastic parts, which adopts the following technical solution: A masking fixture for painting automotive plastic parts includes a masking sleeve with an open upper end face. The pin and locking foot of a control button are inserted into the inner cavity of the masking sleeve. The lower end face of the pressing part of the control button abuts against the upper end face of the masking sleeve. The outer diameter of the masking sleeve is larger than the outer diameter of the pressing part of the control button.
[0006] By adopting the above technical solution, the pin and locking foot of the control button are inserted into the inner cavity of the spray shield sleeve, so that the lower end face of the pressing part abuts against the upper end face of the spray shield sleeve. Since the outer diameter of the spray shield sleeve is larger than the outer diameter of the pressing part, it can effectively prevent accidental spraying from the back of the pressing part.
[0007] Preferably, the upper end face of the spray shielding sleeve is provided with a support protrusion, and at least two support protrusions are provided and symmetrically arranged along the axis of the spray shielding sleeve. The lower end face of the pressing part of the control button abuts against the upper end face of the support protrusion, so that there is a gap between the lower end face of the pressing part of the control button and the upper end face of the spray shielding sleeve.
[0008] By adopting the above technical solution, at least two symmetrical support protrusions along the axis are provided on the upper end face of the masking sleeve, so that there is a gap between the lower end face of the pressing part and the upper end face of the masking sleeve. This ensures that the lower end face of the pressing part will not be accidentally sprayed, while reducing the possibility of the pressing part and the masking sleeve sticking together after painting.
[0009] Preferably, the upper end face of the spray shielding sleeve is integrally formed with a boss, which forms a supporting protrusion.
[0010] By adopting the above technical solution, the integrally molded and fixed boss facilitates the manufacture of this spray masking fixture.
[0011] Preferably, the upper end face of the spray shielding sleeve is provided with a threaded hole, and the spray shielding sleeve is provided with a stud threaded to the threaded hole, the upper end face of the stud protruding from the upper end face of the spray shielding sleeve to form a support protrusion.
[0012] By adopting the above technical solution, the height of the stud can be adjusted through the thread, thereby adjusting the gap size.
[0013] Preferably, the inner wall of the spray shielding sleeve is fixed with a protruding positioning block, and the upper end surface of the positioning block is provided with a positioning hole for the buckle foot of the control button to be inserted through vertically.
[0014] By adopting the above technical solution, the positioning block is provided with positioning holes for the control button latch feet to be inserted, which can accurately position the control button.
[0015] Preferably, it also includes an annular frame, and multiple shielding sleeves are provided and distributed around the axis of the annular frame.
[0016] By adopting the above technical solution, multiple masking sleeves are set and distributed around the axis of the ring frame, which can simultaneously perform masking operations on multiple control buttons, thereby improving the work efficiency of painting automotive plastic parts.
[0017] Preferably, the annular frame includes a central rod, an outer ring coaxially disposed on the central rod, a connecting rod fixedly connected between the outer peripheral wall of the central rod and the inner peripheral wall of the outer ring, and a connecting block fixedly connected to the outer peripheral wall of the outer ring. Multiple connecting rods are provided and distributed around the axis of the central rod, and multiple connecting blocks are provided and distributed around the axis of the central rod. The number of spray shielding sleeves corresponds to the number of connecting blocks, and the outer wall of the spray shielding sleeve is fixedly connected to the connecting block.
[0018] Preferably, the upper end face of the central rod protrudes beyond the upper end face of the spray shield sleeve, so that the upper part of the central rod forms a lifting part.
[0019] By adopting the above technical solution, the upper end face of the central rod protrudes from the upper end face of the spray shielding sleeve to form a lifting part, which makes it convenient for operators to pick up the spray shielding fixture.
[0020] Preferably, a connecting shaft is coaxially fixedly connected to the lower end face of the central rod, and the connecting shaft is used to dock with the rotary table.
[0021] By adopting the above technical solution, the connecting shaft at the lower end of the center rod is connected to the rotary table, which allows the masking fixture to rotate during painting, facilitating the painting operation.
[0022] In summary, this utility model has the following beneficial effects: 1. Insert the control button's pin and latch into the inner cavity of the spray shield sleeve, so that the lower end face of the pressing part abuts against the upper end face of the spray shield sleeve. Because the outer diameter of the spray shield sleeve is larger than the outer diameter of the pressing part, it can effectively prevent accidental spraying from the back of the pressing part. 2. Provide at least two symmetrical support protrusions along the axis on the upper end face of the masking sleeve, so that there is a gap between the lower end face of the pressing part and the upper end face of the masking sleeve, ensuring that the lower end face of the pressing part will not be accidentally sprayed, and reducing the possibility of the pressing part and the masking sleeve sticking together after painting. 3. The height of the stud can be adjusted by adjusting the thread, thereby adjusting the gap size. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the overall structure of a masking fixture for painting automotive plastic parts in Example 1; Figure 2 This is a schematic diagram of the spray shielding sleeve in Example 1; Figure 3 This is a schematic diagram of the spray shielding sleeve in Example 2; Figure 4 This is a schematic diagram of the structure of the spray shielding sleeve in Example 3; Figure 5 This is a schematic diagram of the structure of the control button in the background technology.
[0024] In the diagram, 10 is the pressing part; 20 is the insert post; 30 is the snap-fit foot; 1 is the ring frame; 11 is the center rod; 12 is the outer ring; 13 is the connecting rod; 14 is the connecting block; 15 is the connecting shaft; 2 is the spray shielding sleeve; 21 is the positioning block; 22 is the positioning hole; 23 is the boss; 24 is the threaded hole; 25 is the stud; 26 is the slide rod; 27 is the limit clamp; 3 is the drive assembly; 31 is the adjusting screw; 32 is the screw sleeve; and 33 is the hinge rod. Detailed Implementation
[0025] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.
[0026] Example 1: This application discloses a masking fixture for painting automotive plastic parts, referring to... Figure 1 The system includes an annular frame 1 and a spray shielding sleeve 2 fixed to the outside of the annular frame 1. The annular frame 1 includes a central rod 11, an outer ring 12 coaxially sleeved on the central rod 11, a connecting rod 13 fixedly connected between the outer peripheral wall of the central rod 11 and the inner peripheral wall of the outer ring 12, and a connecting block 14 fixedly connected to the outer peripheral wall of the outer ring 12. Multiple connecting rods 13 are provided and distributed around the axis of the central rod 11, and multiple connecting blocks 14 are provided and distributed around the axis of the central rod 11.
[0027] The upper end face of the center rod 11 protrudes from the upper end face of the spray shielding sleeve 2, forming a lifting part at the top of the center rod 11, making it convenient for the operator to pick up the annular frame 1. A connecting shaft 15 is coaxially fixedly connected to the lower end face of the center rod 11. The lower end face of the connecting shaft 15 protrudes from the lower end face of the spray shielding sleeve 2, and the connecting shaft 15 is used to dock with the rotary table.
[0028] Reference Figure 2 Multiple spray masking sleeves 2 are arranged and distributed around the axis of the annular frame 1. The number of spray masking sleeves 2 corresponds to the number of connecting blocks 14. The outer wall of the spray masking sleeve 2 is fixedly connected to the connecting block 14. In this embodiment, both the upper and lower ends of the spray masking sleeve 2 are open. The outer diameter of the spray masking sleeve 2 is larger than the outer diameter of the pressing part 10 of the control button. A positioning block 21 is fixedly protruding from the inner wall of the spray masking sleeve 2. The upper end face of the positioning block 21 is flush with the upper end face of the spray masking sleeve 2. The number of positioning blocks 21 corresponds to the number of latching feet 30. The upper end face of the positioning block 21 has a positioning hole 22 that is vertically penetrated for the latching feet 30 of the control button to be inserted.
[0029] The upper end face of the spray masking sleeve 2 has a protruding support protrusion, and at least two support protrusions are provided and symmetrically arranged along the axis of the spray masking sleeve 2. In this embodiment, a boss 23 is integrally formed and fixed on the upper end face of the spray masking sleeve 2, and the boss 23 forms the support protrusion. The lower end face of the pressing part 10 of the control button abuts against the upper end face of the support protrusion, so that there is a gap between the lower end face of the pressing part 10 of the control button and the upper end face of the spray masking sleeve 2.
[0030] The implementation principle of a masking fixture for painting automotive plastic parts according to an embodiment of this application is as follows: the snap-fit foot 30 of the control button is inserted into the positioning hole 22, so that the insert 20 of the control button is built into the masking sleeve 2, and the lower end face of the pressing part 10 of the control button abuts against the upper end face of the supporting protrusion. After all the control buttons are placed, the connecting shaft 15 of the lower end face of the center rod 11 is connected to the rotary table, which allows the masking fixture to rotate during painting, which facilitates the painting operation and effectively prevents accidental spraying on the back of the pressing part 10 of the control button.
[0031] Example 2: The difference from Example 1 is that, referring to Figure 3 The upper end face of the spray shielding sleeve 2 is provided with a threaded hole 24. The spray shielding sleeve 2 is provided with a stud 25 that is threaded to the threaded hole 24. The upper end face of the stud 25 protrudes from the upper end face of the spray shielding sleeve 2 to form a support protrusion. The height of the stud 25 can be adjusted by adjusting the thread, thereby adjusting the gap size.
[0032] Example 3: The difference from Example 1 is that, referring to Figure 4 The lower end of the spray shielding sleeve 2 is closed. A sliding rod 26 is radially slidably connected to the lower side wall of the spray shielding sleeve 2. There is a pair of sliding rods 26 symmetrically arranged along the axis. One end of the sliding rod 26 is fixedly connected to a limiting clamp 27 built into the inner cavity of the spray shielding sleeve 2. The two limiting clamps 27 together clamp the insertion post 20 of the control button. The spray shielding sleeve 2 is provided with a driving assembly 3 for driving the sliding rod 26 to slide. The driving assembly 3 includes an adjusting screw 31 coaxially rotatably connected to the lower end face of the spray shielding sleeve 2, a threaded sleeve 32 threaded onto the adjusting screw 31, and a hinge rod 33. One end of the hinge rod 33 is hinged to the end of the sliding rod 26 outside the spray shielding sleeve 2, and the other end of the hinge rod 33 is hinged to the outer wall of the threaded sleeve 32. After the control button's insert 20 is inserted into the inner cavity of the spray shield sleeve 2, the adjusting screw 31 is rotated to drive the screw sleeve 32 to move downward, thereby driving the sliding rod 26 to slide closer to the insert 20 through the hinge rod 33, so that the limiting clamp 27 clamps the insert 20.
[0033] 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 masking fixture for painting automotive plastic parts, characterized in that: Includes a spray masking sleeve (2), the upper end face of the spray masking sleeve (2) is open, the plug (20) and the snap-fit foot (30) of the control button are inserted into the inner cavity of the spray masking sleeve (2), the lower end face of the pressing part (10) of the control button abuts against the upper end face of the spray masking sleeve (2), and the outer diameter of the spray masking sleeve (2) is larger than the outer diameter of the pressing part (10) of the control button.
2. The masking fixture for painting automotive plastic parts according to claim 1, characterized in that: The upper end face of the spray shielding sleeve (2) is provided with a support protrusion. There are at least two support protrusions and they are symmetrically arranged along the axis of the spray shielding sleeve (2). The lower end face of the pressing part (10) of the control button abuts against the upper end face of the support protrusion, so that there is a gap between the lower end face of the pressing part (10) of the control button and the upper end face of the spray shielding sleeve (2).
3. The masking fixture for painting automotive plastic parts according to claim 2, characterized in that: The upper end face of the spray shield sleeve (2) is integrally formed with a boss (23), which forms a supporting protrusion.
4. The masking fixture for painting automotive plastic parts according to claim 2, characterized in that: The upper end face of the spray shielding sleeve (2) is provided with a threaded hole (24), and the spray shielding sleeve (2) is provided with a stud (25) threadedly connected to the threaded hole (24). The upper end face of the stud (25) protrudes from the upper end face of the spray shielding sleeve (2) to form a support protrusion.
5. The masking fixture for painting automotive plastic parts according to claim 1, characterized in that: The inner wall of the spray shield sleeve (2) is fixed with a positioning block (21), and the upper end surface of the positioning block (21) is provided with a positioning hole (22) for the buckle foot (30) of the control button to be inserted.
6. The masking fixture for painting automotive plastic parts according to claim 1, characterized in that: It also includes a ring frame (1), and multiple spray shielding sleeves (2) are provided and distributed around the axis of the ring frame (1).
7. A masking fixture for painting automotive plastic parts according to claim 6, characterized in that: The annular frame (1) includes a central rod (11), an outer ring (12) coaxially arranged on the central rod (11), a connecting rod (13) fixedly connected between the outer peripheral wall of the central rod (11) and the inner peripheral wall of the outer ring (12), and a connecting block (14) fixedly connected to the outer peripheral wall of the outer ring (12). There are multiple connecting rods (13) distributed around the axis of the central rod (11), and there are multiple connecting blocks (14) distributed around the axis of the central rod (11). The number of spray shielding sleeves (2) corresponds to the number of connecting blocks (14), and the outer wall of the spray shielding sleeves (2) is fixedly connected to the connecting blocks (14).
8. A masking fixture for painting automotive plastic parts according to claim 7, characterized in that: The upper end face of the central rod (11) protrudes from the upper end face of the spray sleeve (2), so that the upper part of the central rod (11) forms a lifting part.
9. A masking fixture for painting automotive plastic parts according to claim 7, characterized in that: The lower end face of the central rod (11) is coaxially fixedly connected to a connecting shaft (15), which is used to dock with the rotary table.