Paint spraying device and method

Abstract

This invention discloses a clamping device and spraying method for spray painting, belonging to the technical field of spray painting fixtures. The clamping device includes a spray painting tray with several square holes, and a clamping fixture mounted on the spray painting tray. The clamping fixture is made of carbon steel wire tightly wound into a spring, with supporting steel wires extending from both ends of the spring. The supporting steel wires can rotate 360 ​​degrees along the tail end of the spring coil. The spring portion of the clamping fixture is located on the lower end face of the spray painting tray. The two supporting steel wires of the clamping fixture pass through the square holes of the spray painting tray from the lower end to the upper end, and the elastic force of the tightly wound spring on the lower end face is used to fix the entire fixture on the tray. This device is designed according to the structural characteristics of the parts to be painted and is suitable for spray painting and clamping of various lightweight, small, and perforated parts. The painted surface of the parts is free of clamp marks, tray marks, and spraying dead corners.

Description

Technical Field

[0001] This invention belongs to the field of paint spraying fixture technology, specifically relating to a paint spraying clamping device and a paint spraying method. Background Technology

[0002] Currently, there are many types of parts that require painting, such as some molded plastic parts, for which painting of the outer surface has been added as needed. Typically, the spray gun pressure is around 0.5 MPa during painting, while the parts weigh only about ten grams, making clamping these parts difficult. Due to the light weight of the material, the spray gun pressure can cause the parts to move, making them difficult to fix and hindering the painting process. If the parts are fixed to a flat surface on a tray, there will be blind spots and tray marks on the surface. Manually flipping the parts by hand can leave marks and result in uneven painting.

[0003] Chinese utility model patent CN213255229U discloses a robotic painting fixture for hydraulic support column components. It includes a docking ring for connection to a lifting device, a clamping jaw assembly for connection to the column head pin hole of the hydraulic support column component, and a four-bar linkage between the docking ring and the clamping jaw assembly. The docking ring connects the clamping jaw assembly to the lifting device, and the clamping jaw assembly and four-bar linkage generate a lateral tightening force on the hydraulic support column component, thus improving the lifting and installation performance of the hydraulic support column component and increasing painting production efficiency. While the clamping method matches the special structure of the part, achieving safe clamping, the parts in this invention are lightweight and have a simple structure, making them unsuitable for this fixture. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to provide a clamping device for spray painting and a spray painting method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a spray painting clamping device, comprising a spray painting tray with several square holes, and a clamping fixture disposed on the spray painting tray. The clamping fixture is made of carbon steel wire tightly wound into a spring, and supporting steel wires extend from both ends of the spring. The supporting steel wires can rotate 360 ​​degrees along the tail end of the spring coil.

[0006] The spring part of the clamping fixture is located on the lower end face of the paint spray tray. The two supporting steel wires of the clamping fixture pass through the square hole of the paint spray tray from the lower end to the upper end, and the elastic force of the tightly wound spring on the lower end face is used to fix the entire fixture on the tray.

[0007] Preferably, the paint spraying tray is a rectangular tray formed by welding several steel bars in a crisscross pattern, with supporting legs provided below the rectangular tray, and several rectangularly arranged square holes formed on the rectangular tray.

[0008] Preferably, the clamping fixture is made of spring carbon steel wire with a diameter of 0.6 to 0.8 mm, with the spring tightly wound, the number of turns being 15 to 20, the length being 18 to 25 mm, and the length at both ends being ≥50 mm.

[0009] Preferably, the clamping fixture can be customized to specific dimensions according to the size of the painted parts.

[0010] A method for spray painting using a spray painting clamping device includes the following steps:

[0011] Step 1: Pass the clamping fixture through the hole in the paint tray and use the elastic force of the tightly wound spring at the bottom to fix several clamping fixtures on the paint tray;

[0012] Step 2: Pass the two end support wires through or into the through holes or blind holes of the parts to be painted, and use the elasticity of the spring wires to fix the parts on the clamping fixture, thus forming the clamping of the parts and the fixing of the clamping fixture and the paint tray.

[0013] Step 3: Use a spray gun to spray paint in batches.

[0014] Preferably, the placement distance between the clamping fixtures in step 1 is greater than the length of the supporting steel wire.

[0015] Preferably, the part in step 2 is a plastic part or a small metal part, the part has a symmetrical structure, and is provided with symmetrical through holes or blind holes.

[0016] Preferably, the weight of the part is ≤30g.

[0017] Preferably, in step 3, a spray gun is used to spray paint the clamped parts in batches, completing the painting of each surface in one go, eliminating dead corners and tray marks that cannot be painted.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. It utilizes the elasticity of steel wire and the elasticity of springs to achieve elastic fixation between the clamp and the parts, as well as elastic support and fixation between the clamp and the tray. During the mass production of parts for painting, the parts can be flexibly placed, and the parts are clamped and fixed stably without being blown by the pressure of the spray gun.

[0020] 2. Designed according to the structural characteristics of the parts to be painted, it is suitable for painting and clamping various lightweight, small, and perforated parts. The painted surface of the parts is free of clamp marks, tray marks, and painting dead corners.

[0021] 3. The fixture is easy to manufacture and process, with a simple and easy clamping method, allowing for batch painting. Different wire diameters can be selected for processing according to the size of the parts to be painted. The specific dimensions of the fixture can be customized based on the dimensions of the parts to be painted, resulting in low production costs and flexible dimensional processing. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the clamping structure of the spray painting clamping device in this invention;

[0024] Figure 2 In this invention Figure 1 The front view;

[0025] Figure 3 This is a schematic diagram of the structure of the spring steel wire in this invention. Figure 1 ;

[0026] Figure 4 This is a schematic diagram of the structure of the spring steel wire in this invention. Figure 2 ;

[0027] Figure 5 This is a schematic diagram of the structure of the part in this invention;

[0028] Figure 6 This is a schematic diagram of the tray structure in this invention;

[0029] In the diagram, 1-paint tray; 2-clamping fixture; 3-part. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments. All modifications, substitutions and alterations made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0031] Reference Figure 1 and Figure 2A spray painting clamping device includes a spray painting tray 1 with several square holes, and a clamping fixture 2 disposed on the spray painting tray 1. The clamping fixture 2 is made of carbon steel wire tightly wound into a spring, with support steel wires extending from both ends of the spring. The support steel wires can rotate 360 ​​degrees along the tail end of the spring coil. The spring portion of the clamping fixture 2 is disposed on the lower end face of the spray painting tray 1. The two support steel wires of the clamping fixture 2 pass through the square holes of the spray painting tray 1 from the lower end to the upper end, and the entire clamp is fixed to the tray by the elastic force of the tightly wound spring on the lower end face. Then, the workpiece is fixed by inserting symmetrical blind holes into the support steel wires.

[0032] Reference Figure 3 and Figure 4 The clamping fixture 2 is made of 0.7mm diameter spring carbon steel wire, with the spring tightly wound, 18 turns, 25mm in length, and 60mm left at both ends.

[0033] Reference Figure 5 The painted part 3 is a plastic part, weighing 30g. The structure of part 3 is diagonally symmetrical, with cylindrical blind holes on the diagonals to facilitate the symmetrical insertion of steel wires and fixation to the paint tray.

[0034] Reference Figure 6 The paint spray tray 1 is 800*800mm in size, with evenly distributed 15*15mm square holes, and is 25mm thick. It is made of multiple steel bars welded together.

[0035] The clamping method is as follows: including the following steps,

[0036] Step 1: Pass the clamping fixture 2 through the hole in the paint tray 1, and use the elastic force of the tightly wound spring at the bottom to fix several clamping fixtures 2 on the paint tray 1. The placement distance between the clamping fixtures 2 is greater than the length of the supporting steel wire.

[0037] Step 2: Pass the two end support steel wires through or into the through holes or blind holes of the sprayed part 3, and fix the part on the clamping fixture 2 by relying on the elasticity of the spring steel wire, thus forming the clamping of the clamping fixture 2 and the part 3, and the fixing of the clamping fixture 2 and the paint tray 2.

[0038] Step 3: Use a spray gun to spray paint the clamped parts 3 in batches, completing the painting of each surface in one go, without any dead corners or pallet marks that cannot be painted.

[0039] This invention is applicable to the clamping and mounting of various lightweight, small-sized parts with holes for painting. Furthermore, because the clamping material, spring steel wire, is readily available, and different wire diameters can be selected for processing according to the size of the parts to be painted, the specific dimensions of the clamp can be customized based on the dimensions of the parts. The clamp has low production costs and flexible dimensional processing. This invention primarily utilizes the elasticity of the steel wire and the elasticity of the spring wound to achieve elastic fixation between the clamp and the part, as well as elastic support and fixation between the clamp and the tray. During batch painting production of parts, flexible placement is possible, with the clamping positions ensuring that the painting surface is not obstructed.

[0040] In summary, this invention provides a practical and effective method for spray painting and clamping various lightweight, small-sized, and perforated parts, and has certain promotional and reference value.

[0041] The foregoing has provided a detailed description of the clamping device and painting method for spraying paint provided by the present invention. Specific examples have been used to illustrate the structure and working principle of the present invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A clamping device for spray painting, characterized in that: Used for clamping parts (3), parts (3) are plastic or small metal parts, the weight of parts (3) is ≤30g, the structure of parts (3) is symmetrical, and symmetrical through holes or blind holes are provided; The clamping device includes a paint tray (1) with several square holes and a clamping fixture (2) set on the paint tray (1). The clamping fixture (2) is made of carbon steel wire tightly wound into a spring, and support steel wires extend from both ends of the spring. The support steel wires can rotate 360 ​​degrees along the tail end of the spring coil. The support steel wires at both ends pass through or into the through holes or blind holes of the sprayed parts (3), and the parts are fixed on the clamping fixture (2) by the elastic force of the spring steel wires. The spring part of the clamping fixture (2) is set on the lower end face of the paint tray (1). The two supporting steel wires of the clamping fixture (2) pass through the square hole of the paint tray (1) from the lower end to the upper end, and use the elastic force of the tightly wound spring on the lower end face to fix the entire fixture on the tray. The clamping fixture (2) is made of spring carbon steel wire with a wire diameter of 0.6 to 0.8 mm. The spring is tightly wound with 15 to 20 turns and a length of 18 to 25 mm, with a length of ≥50 mm left at both ends.

2. The clamping device for spray painting according to claim 1, characterized in that: The paint tray (1) is a rectangular tray made of several steel bars welded together in a crisscross pattern. Support legs are provided below the rectangular tray, and several rectangular square holes are formed on the rectangular tray.

3. The clamping device for spray painting according to claim 1, characterized in that: The clamping fixture (2) can be customized according to the size of the painted parts.

4. A method for spray painting using the clamping device for spray painting as described in any one of claims 1-3, characterized in that: Includes the following steps, Step 1: Pass the clamping fixture (2) through the hole in the paint tray (1) and use the elastic force of the tightly wound spring at the bottom to fix several clamping fixtures (2) on the paint tray (1); Step 2: Pass the two end support wires through or into the through holes or blind holes of the sprayed part (3), and fix the part on the clamping fixture (2) by relying on the elasticity of the spring wire, thus forming the clamping of the clamping fixture (2) and the part (3), and the fixing of the clamping fixture (2) and the paint tray (1). Step 3: Use a spray gun to spray paint in batches.

5. The painting method according to claim 4, characterized in that: The placement distance between the clamping fixtures (2) in step 1 is greater than the length of the supporting steel wire.

6. The painting method according to claim 4, characterized in that: In step 3, a spray gun is used to spray paint the clamped parts (3) in batches, and the painting of each surface is completed in one go, so that there are no dead corners or tray marks that cannot be painted.

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