A surface plastic spraying device for metal part machining

Abstract

The utility model discloses a surface plastic spraying device for metal part machining, including support, the upper surface rotation of support is connected with big turntable, the upper surface of big turntable evenly rotation is connected with a plurality of small turntable for placing workpiece, the one side of support is installed linear screw module, install the cover on linear screw module, the top of cover is installed drive motor, and the device is through big turntable and is collocated with a plurality of small turntable, and is combined with servo motor and revolves bearing drive, and the processing efficiency is greatly promoted, the cover adopts the combination structure of upper cover and movable lower cover, and the bottom rubber pad strengthens the sealing performance, effectively avoids the leakage of plastic powder, and is more environmental protection. The workpiece is bidirectional clamped in upper pressure disc and small turntable, avoids the powder mistake and sprays the inside of workpiece. Drive motor drives workpiece uniformity rotation, cooperates fixed spray gun and sprays, ensures that coating is even and dense, solves the problem of manual plastic spraying, and significantly improves the anticorrosion and antirust effect.

Description

Technical Field

[0001] This utility model relates to the field of powder coating technology, specifically to a surface powder coating device for processing metal parts. Background Technology

[0002] Powder coating of metal parts is a key anti-corrosion and anti-rust process in machinery manufacturing, automotive industry, and building hardware. By forming a dense and uniform powder coating, the service life of parts under complex working conditions can be significantly extended. Among them, hollow workpieces such as pipes are widely used metal parts, and the technical challenges of powder coating are particularly prominent. The defects of existing processing methods have seriously restricted production efficiency and product quality.

[0003] The core requirement for powder coating of this type of workpiece is to form an effective coating only on the outer surface, without coating the inner cavity wall. The traditional manual operation mode of holding a spray gun is completely unsuitable for this special characteristic: First, the spray range is difficult to control precisely. The spray gun angle and spray distance are prone to fluctuation during manual operation, which can easily lead to powder coating being sprayed onto the inner cavity wall. This not only requires additional manpower and resources for subsequent cleaning, increasing process costs, but may also damage the precision of the inner wall of the workpiece due to the cleaning operation, affecting assembly compatibility. Second, manual powder coating can easily lead to uneven coating thickness on the circumferential surface, missed spraying at axial joints, or local powder accumulation, which damages the density of the coating, directly reduces the anti-corrosion and anti-rust effect, and shortens the service life of the workpiece.

[0004] Therefore, addressing the challenges of powder coating hollow workpieces such as pipes, developing a powder coating device that is adapted to their structural characteristics, highly efficient, precise, and environmentally friendly has urgent practical application value. To this end, a surface powder coating device for metal parts processing is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a surface powder coating device for processing metal parts, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a surface powder coating device for processing metal parts, comprising a support, a large turntable rotatably connected to the upper surface of the support, and a plurality of small turntables for placing workpieces rotatably connected to the upper surface of the large turntable;

[0007] A linear screw module is installed on one side of the bracket, a cover is installed on the linear screw module, a drive motor is installed above the cover, the output shaft of the drive motor passes through the upper surface of the cover and is fitted with an upper pressure plate for pressing the workpiece, and a spray gun is installed on the upper inner side of the cover.

[0008] Preferably, the cover includes an upper cover, and a lower cover is movably sleeved on the outer side of the upper cover. The bottom of the upper cover and the upper part of the lower cover are each provided with a folded edge for limiting the lower cover.

[0009] Preferably, the upper cover is fixedly connected to the slider on the linear lead screw module via a frame.

[0010] Preferably, a rubber pad is installed at the bottom of the lower cover where it contacts the large turntable.

[0011] Preferably, the large turntable is rotatably connected to the upper surface of the bracket via a slewing bearing, and a servo motor for driving the large turntable to rotate is installed on the bracket.

[0012] Preferably, the feed port of the spray gun is connected to an external powder coating machine via a flexible hose.

[0013] Compared with existing technologies, the advantages of this invention are as follows: The device utilizes a large turntable paired with multiple smaller turntables, driven by a servo motor and rotary bearings, significantly improving processing efficiency. The cover employs a combination structure of an upper cover and a movable lower cover, with a bottom rubber pad enhancing sealing performance, effectively preventing powder leakage and enhancing environmental friendliness. The upper pressure plate and smaller turntables clamp the workpiece bidirectionally, preventing powder from accidentally spraying onto the inside of the workpiece. The drive motor rotates the workpiece at a uniform speed, working in conjunction with a fixed spray gun to ensure a uniform and dense coating, solving the problems of missed spraying and powder accumulation in manual powder coating, and significantly improving corrosion and rust prevention. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a bottom view of the structure of this utility model;

[0016] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 4 This is a schematic diagram of the structure of the cover of this utility model.

[0018] In the diagram: 1. Support frame; 2. Large turntable; 3. Small turntable; 4. Cover; 41. Upper cover; 42. Lower cover; 43. Folded edge; 5. Drive motor; 6. Linear screw module; 7. Rotary bearing; 8. Servo motor; 9. Spray gun; 10. Upper pressure plate. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0020] Please see Figure 1-4This utility model provides a technical solution: a surface powder coating device for processing metal parts, including a bracket 1, a large turntable 2 rotatably connected to the upper surface of the bracket 1 via a rotary bearing 7, a servo motor 8 for driving the rotary bearing 7 to rotate on the bracket 1, and multiple small turntables 3 for placing workpieces uniformly rotatably connected to the upper surface of the large turntable 2.

[0021] A linear screw module 6 is fixedly installed on one side of the bracket 1. A cover 4 is installed on the slider of the linear screw module 6. A drive motor 5 is fixedly installed on the top of the cover 4. The output shaft of the drive motor 5 extends vertically downward through the upper surface of the cover 4. An upper pressure plate 10 for pressing the workpiece on the small turntable 3 is fixedly installed at the end of the output shaft. A rubber pad is installed on the lower surface of the upper pressure plate 10. A spray gun 9 is installed on the upper inner side of the cover 4 corresponding to the workpiece position. The inlet of the spray gun 9 is connected to the external powder coating machine through a hose to achieve stable delivery of powder coating raw materials.

[0022] like Figure 4 As shown: The cover 4 includes an upper cover 41 and a lower cover 42 that is movably sleeved on the outside of the upper cover 41. The bottom of the upper cover 41 and the adjacent side of the upper part of the lower cover 42 are both integrally formed with a folded edge 43. The folded edge 43 can restrict the up and down movement of the lower cover 42, prevent the lower cover 42 from separating from the upper cover 41, and adapt to the powder coating requirements of workpieces of different heights.

[0023] like Figure 1 and Figure 3 As shown: The upper cover 41 is fixedly connected to the slider on the linear screw module 6 through an integrated frame. The frame enhances the connection strength between the upper cover 41 and the slider, ensuring the stability of the cover 4 when the linear screw module 6 drives the cover 4 to move up and down, so that the cover 4 covers the workpiece on the small turntable 3 below.

[0024] like Figure 4 As shown: A rubber pad is bonded to the bottom of the lower cover 42 where it contacts the large turntable 2. The rubber pad can fill the gap between the lower cover 42 and the large turntable 2, improve the sealing during powder coating, prevent powder leakage, and at the same time buffer collisions and reduce wear between the lower cover 42 and the large turntable 2.

[0025] like Figure 2 As shown: The inner ring of the rotary bearing 7 is fixed to the upper surface of the bracket 1, and the outer ring is fixed to the lower surface of the large turntable 2. The output end of the servo motor 8 is connected to the rotary bearing 7 through a gear set, which can drive the large turntable 2 to rotate smoothly and at a uniform speed, so that multiple small turntables 3 enter the powder coating area in sequence, thereby improving processing efficiency.

[0026] like Figure 3 As shown: The spray gun 9 is connected to the upper inner side of the cover 4 via an adjustable bracket. The hose connected to its inlet has the characteristics of high pressure resistance and high flexibility, which not only does not affect the movement of the cover 4, but also ensures a continuous and stable supply of powder coating material, thus ensuring the uniformity of powder coating.

[0027] Working Principle: When processing pipes or hollow workpieces, the external powder coating machine is securely connected to the feed inlet of the spray gun 9 via a flexible hose to ensure unobstructed supply of powder coating material. At the start of processing, the operator places the part to be powder coated on the surface of the small turntable 3 on the large turntable 2. Each small turntable 3 has an anti-slip surface to initially prevent the workpiece from shifting after placement. The control system is then activated. Upon receiving a signal, the linear screw module 6's slider moves the cover 4 downwards via the frame. Simultaneously, since the lower cover 42 is movably fitted onto the outside of the upper cover 41, and both are limited by the folded edge 43, after the lower cover 42 contacts the large turntable 2, the upper cover 41 can continue to be finely adjusted downwards according to the workpiece height, causing the upper pressure plate 10 inside the cover 4 to contact the top of the workpiece until the lower surface of the upper pressure plate 10 is in close contact with the top of the workpiece. The downward pressure of the upper pressure plate 10 and the supporting force of the small turntable 3 create a clamping force, achieving bidirectional limitation of the workpiece and preventing it from loosening or shifting during rotation.

[0028] After clamping, the output shaft of the drive motor 5 drives the upper pressure plate 10 to rotate at a constant speed, thereby driving the workpiece to rotate synchronously with the small turntable 3. The rotation speed can be steplessly adjusted by the control system according to the workpiece size and powder coating requirements to ensure that all areas of the workpiece surface can receive powder coating evenly. At the same time, the external powder coating machine is started, and the powder coating is delivered to the hose under high pressure and then sprayed out through the nozzle of the spray gun 9. The spray gun 9 is fixed to the upper inner side of the cover 4 by an adjustable bracket, and its spray angle is preset to fully cover the side of the workpiece. As the workpiece continues to rotate, the powder coating is evenly adhered to the workpiece surface, avoiding problems such as missed spraying and uneven spraying thickness.

[0029] Once the powder coating of a single workpiece reaches the preset time, the powder coating machine stops feeding material, the spray gun 9 stops spraying, and the drive motor 5 stops rotating. Subsequently, the linear screw module 6 drives the cover 4 to move upward, releasing the clamping of the workpiece. Immediately afterwards, the servo motor 8 on the bracket 1 starts, and its output end is connected to the rotary bearing 7 through a gear set, thereby driving the large turntable 2 to rotate, so that the next small turntable 3 loaded with the workpiece to be processed rotates precisely to below the cover 4. The entire switching process is fast and precise, requiring no manual intervention.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A surface powder coating device for processing metal parts, comprising a support (1), characterized in that: The upper surface of the bracket (1) is rotatably connected to a large turntable (2), and the upper surface of the large turntable (2) is uniformly rotatably connected to multiple small turntables (3) for placing workpieces. A linear screw module (6) is installed on one side of the bracket (1), a cover (4) is installed on the linear screw module (6), a drive motor (5) is installed above the cover (4), the output shaft of the drive motor (5) passes through the upper surface of the cover (4) and is fitted with an upper pressure plate (10) for pressing the workpiece, and a spray gun (9) is installed on the upper inner side of the cover (4).

2. The surface powder coating device for metal parts processing according to claim 1, characterized in that: The cover (4) includes an upper cover (41), and a lower cover (42) is movably sleeved on the outside of the upper cover (41). The bottom of the upper cover (41) and the upper part of the lower cover (42) are both provided with folded edges (43) for limiting the lower cover (42).

3. The surface powder coating device for metal parts processing according to claim 2, characterized in that: The upper cover (41) is fixedly connected to the slider on the linear lead screw module (6) through the frame.

4. The surface powder coating device for metal parts processing according to claim 2, characterized in that: The bottom of the lower cover (42) that contacts the large turntable (2) is fitted with a rubber pad.

5. The surface powder coating device for metal parts processing according to claim 1, characterized in that: The large turntable (2) is rotatably connected to the upper surface of the bracket (1) via a rotary bearing (7), and a servo motor (8) for driving the large turntable (2) to rotate is installed on the bracket (1).

6. The surface powder coating device for metal parts processing according to claim 1, characterized in that: The feed port of the spray gun (9) is connected to an external powder coating machine via a hose.

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