Jointed part painting protection kit
By designing an interference fit between the holes of the aluminum alloy protective plate and the protective plug, and adjusting the adhesive tape, the problems of low protection efficiency and inconvenient removal of the non-painted parts of the joint components were solved, achieving a highly efficient and convenient paint protection effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHENGZHOU AIRCRAFT EQUIP
- Filing Date
- 2025-07-08
- Publication Date
- 2026-07-10
AI Technical Summary
In the existing technology, the unpainted parts of joint-type parts have low protection efficiency, are inconvenient to disassemble and have high labor intensity, and the rubber plate is easily blown up, causing paint leakage and increasing the amount of cleaning work.
Design a paint protection accessory that includes a protective plate and a protective plug. The protective plate is made of aluminum alloy sheet, and the protective plug consists of a cap and a plug. The tightness is adjusted by interference fit of the hole and medical tape to achieve effective protection for non-painted parts.
It achieves paint-free spraying, improves protection efficiency, reduces labor intensity, simplifies disassembly, and enhances protective effect.
Smart Images

Figure CN224475158U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of workpiece processing, and specifically proposes a paint protection accessory for joint parts. Background Technology
[0002] See Figure 1 For connector-type parts, the general painting requirement is to paint the outer surface, while the holes and inner surfaces do not need to be painted. Usually, manual protection is required for the unpainted parts to prevent the paint layer from being sprayed onto these surfaces, thus avoiding the inability to connect with other parts or the excessive tightness after connection.
[0003] However, the existing technology that uses manual tape application to protect individual workpieces is prone to problems such as low protection efficiency, inconvenient removal, high labor intensity, and over-protection. On the other hand, the rubber sheet made of rubber is only 0.8mm thick. During the painting process, the gas pressure can blow the rubber sheet up locally, causing paint to be applied to areas that should not be painted. This requires cleaning up the excess paint later, increasing the workload. Utility Model Content
[0004] This utility model provides a paint protection accessory for connector parts, which effectively protects the unpainted surface.
[0005] This utility model proposes a paint protection accessory for connector parts, including a protective plate and a protective plug. The protective plate has the same shape as the protective surface of the connector part and has a through hole of the same size as the protective hole. The protective plug includes an integral head, a cap and a plug rod. The diameter of the cap is larger than the protective hole, and the diameter of the plug rod is smaller than the protective hole. The tightness between the plug rod and the protective hole is adjusted by medical tape.
[0006] Advantageously, the insertion rod is a round tube or a cylinder.
[0007] Advantageously, the protective plate is made of aluminum alloy sheet.
[0008] Advantageously, the protective plate is made of 2A12-T4 sheet material.
[0009] Advantageously, the thickness of the protective plate is 0.4 mm to 1.0 mm.
[0010] Advantageously, the surface of the aluminum alloy sheet is coated with pure aluminum.
[0011] Advantageously, the head is the operating part.
[0012] Advantageously, the diameter of the cap is 4 mm to 6 mm larger than the protective hole.
[0013] Advantageously, the diameter of the insertion rod is 0.5 mm to 1 mm smaller than that of the protective hole.
[0014] Beneficial effects: No paint leakage during spraying, excellent protective effect, and simple and quick disassembly, improving efficiency. It achieves practical value by improving protective efficiency, reducing labor intensity, enhancing protective effect, and simplifying operation. Attached Figure Description
[0015] Figure 1 This is a perspective view of a connector-type part;
[0016] Figure 2 An assembly diagram for painted protective accessories;
[0017] Figure 3 This is a schematic diagram of the protective panel;
[0018] Figure 4 This is a schematic diagram of a protective plug.
[0019] 1-Protective plate, 2-Protective plug, 3-Through hole, 4-Insertion rod, 5-Head, 6-Cap Detailed Implementation
[0020] See Figure 2 The diagram shows the assembly of the paint protection accessories, including a protective plate 1 and a protective plug 2. After the two are combined and installed, they can protect the protective surface and protective holes of the joint parts.
[0021] Figure 3 The middle protective plate 1, including through holes 3, is made of 0.4mm to 1.0mm thick 2A12-T4 sheet metal. Its profile is consistent with the protective surface of the joint-type parts, and it has through holes 3 of the same size as the protective holes. The aluminum alloy sheet metal supplied in T4 condition has a certain strength and strong resistance to air pressure during the spraying process, so it will not be blown away; the aluminum cladding layer on the surface of the aluminum alloy sheet metal is pure aluminum, which will not scratch the surface of the protected parts.
[0022] Figure 4 The middle protective plug 2 includes a head 5, a cap 6, and an insert 4, where the insert 4 is a round tube or cylinder. The head 5 is the operating part. Depending on the size of the protective hole, the diameter of the cap 6 should be 4mm to 6mm larger than the protective hole, and the diameter of the insert 4 should be 0.5mm to 1mm smaller than the protective hole. The insert 4 is thickened by wrapping it with medical tape to adjust the tightness of the fit with the protective hole. At the same time, this allows the end face of the cap 6 to press the protective plate 1 tightly against the protective surface.
[0023] Using planar positioning and interference fit of holes for fixation, the painted protective accessories are installed on the joint-type parts. The protective plug 2 is interference fit with the hole of the part, and the cap 6 is tightly fitted with the plate to play a protective role.
[0024] In one embodiment, the template 1 uses a combination of aluminum alloy sheet and plastic protective plug 2 to protect non-painted areas. The thickness of the aluminum alloy sheet is designed as needed. By using a thin aluminum alloy sheet with a certain strength and an aluminum cladding layer, it can be fitted to the surface, reducing obstruction to painting at the junction of planes.
[0025] Based on the nature of the protected parts, different materials are combined. For internal hole protection, plastic material is selected, which is elastic and will not scratch the surface of the parts, allowing for a tight fit with the parts and easy installation and removal.
Claims
1. A paint-coated protective accessory for connector parts, characterized in that: It includes a protective plate (1) and a protective plug (2). The protective plate (1) has the same shape as the protective surface of the connector part and has a through hole (3) of the same size as the protective hole. The protective plug (2) includes an integral head (5), a cap (6) and a rod (4). The diameter of the cap (6) is larger than the protective hole, and the diameter of the rod (4) is smaller than the protective hole. The tightness between the rod (4) and the protective hole is adjusted by medical tape.
2. The paint-coated protective accessory for connector parts according to claim 1, characterized in that: The insertion rod (4) is a round tube or a cylinder.
3. The paint-coated protective accessory for joint parts according to claim 1, characterized in that: The protective plate (1) is made of aluminum alloy sheet.
4. The paint-coated protective accessory for joint parts according to claim 3, characterized in that: The protective plate (1) is made of 2A12-T4 board.
5. The paint protection accessory for joint parts according to claim 3, characterized in that: The thickness of the protective plate (1) is 0.4mm to 1.0mm.
6. The paint protection accessory for joint parts according to claim 3, characterized in that: The surface of the aluminum alloy sheet is coated with pure aluminum.
7. The paint-coated protective accessory for connector parts according to claim 1, characterized in that: The head (5) is the operating part.
8. The paint-coated protective accessory for connector parts according to claim 1, characterized in that: The diameter of the cap (6) is 4mm to 6mm larger than the protective hole.
9. The paint-coated protective accessory for joint parts according to claim 1, characterized in that: The diameter of the insertion rod (4) is 0.5 mm to 1 mm smaller than that of the protective hole.