Powder spray hanger for non-porous workpieces with stud

Abstract

The application discloses a powder spraying hanger for a non-porous stud workpiece, and aims to solve the technical problems of difficult suspension and poor spraying quality of the non-porous stud workpiece during powder spraying. The hanger comprises a hanger plate, a fixing pipe and a protective sleeve. The hanger plate and the fixing pipe are made of metal materials and are used for guiding static electricity to the workpiece. The fixing pipe with a sharp mouth is used for gap cooperation with a stud of the workpiece to realize rapid positioning. The protective sleeve made of high-temperature-resistant silica gel is used for interference fit with the stud of the workpiece to realize stable suspension of the workpiece. The threads are effectively protected, the spraying adhesion is prevented, and the workpiece clamping efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of sheet metal powder coating equipment, specifically to a powder coating fixture for a workpiece without holes and with studs. Background Technology

[0002] Currently, the surface powder coating of sheet metal parts without holes and studs typically employs electrostatic spraying. This process requires the workpiece to be conductive to allow for paint adsorption. Specifically, the workpiece is fixed to a welded stud by winding metal wire and then suspended in an electrostatically charged spraying conveyor chain. The static electricity is conducted to the workpiece surface through the hanger and the metal wire, giving it a positive charge. Subsequently, during the movement of the production line, the workpiece undergoes dust removal, drying, powder coating, high-temperature curing, and unloading processes. During this process, the negatively charged powder coating adheres evenly to the workpiece surface due to electrostatic adsorption, ultimately forming a coating.

[0003] Through long-term practical research, the inventors discovered that existing methods for suspending and painting sheet metal parts without holes and with attached studs generally rely on manually wrapping metal wires to fix the workpiece in multiple directions. This method is cumbersome and inefficient. Furthermore, removing the metal wires after painting is not only difficult but also easily scratches the workpiece surface, affecting the quality of the finished product. In addition, during the operation of the suspension chain, vibration or movement can easily cause the metal wires to loosen or fall off, causing the workpiece to fall and interrupting the painting process. The disposable tape used to protect the studs during painting not only increases labor time and costs but also has problems such as easy detachment and environmental pollution. The information disclosed in this background section is only for enhancing the understanding of the background technology of this disclosure and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0004] In view of at least one of the above technical problems, this application discloses a powder coating hanger for workpieces without holes and studs, which aims to solve the technical problems of difficulty in hanging and poor coating quality when powder coating workpieces without holes are subjected to powder coating.

[0005] According to one aspect of this disclosure, a powder coating fixture for workpieces without holes and with attached studs is provided, comprising a mounting plate arrayed with a plurality of spraying openings, a plurality of fixing tubes arrayed and fixed around the mounting plate corresponding to each of the spraying openings and for correspondingly inserting workpiece studs, and a protective sleeve interference-fitted to the end of the workpiece stud corresponding to the extension of the fixing tube and for relatively fixing the workpiece stud within the fixing tube; the tube hole of the fixing tube penetrates through the mounting plate and is clearance-fitted with the workpiece stud, and the sum of the thicknesses of the fixing tube and the mounting plate is less than the length of the workpiece stud.

[0006] In some embodiments of this disclosure, the port of each of the fixing tubes used to abut against the workpiece stud is a pointed end.

[0007] In some embodiments of this disclosure, each of the fixing tubes is divided into several groups, and the number of fixing tubes in each group matches the number of studs in a single non-hole studded workpiece.

[0008] In some embodiments of this disclosure, the mounting plate includes a hanging hole at the top, through which a hook for connecting a spraying mobile suspension chain is inserted.

[0009] In some embodiments of this disclosure, the protective sleeve is a high-temperature silicone protective sleeve with an inner diameter 0.3 to 0.4 mm smaller than the outer diameter of the workpiece stud and an outer diameter larger than the inner diameter of the fixing tube.

[0010] One or more technical solutions provided in this application embodiment have at least one of the following technical effects or advantages: The main load-bearing capacity is provided by the mounting plate, and the anti-reverse function is provided by the high-temperature silicone protective sleeve. The clearance fit between the fixing tube fixed on the mounting plate and the workpiece stud, and the interference fit between the high-temperature silicone protective sleeve and the protruding end of the workpiece stud, not only avoid the impact of spraying on the workpiece stud, but also ensure the quality and integrity of the workpiece spraying. Compared with the traditional installation method of wire wrapping and tape protection, this reduces damage to the workpiece during installation and removal, simplifies the clamping process, and enables rapid installation and removal of workpieces without hole-mounted studs. Furthermore, the pointed end of the fixing tube minimizes the contact between the fixing tube and the workpiece, preventing spraying omissions and adhesion. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the powder coating hanger in one embodiment of this application.

[0012] Figure 2 This is a schematic diagram of another overall structure of the powder coating hanger in one embodiment of this application.

[0013] Figure 3 This is a schematic diagram of the structure of a holeless studded workpiece in one embodiment of this application.

[0014] In the above figures, 1 is the mounting plate, 2 is the fixing tube, 3 is the base plate, 4 is the stud, 5 is the pointed end, 6 is the high-temperature silicone protective sleeve, 7 is the round hole, and 8 is the spraying window. Detailed Implementation

[0015] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "vertical," "horizontal," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "connection" and "linkage" in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0016] Unless otherwise specified, the unit modules, components, structures, mechanisms, or sensors involved in the following embodiments are all commercially available products.

[0017] To better understand the technical solution of this application, the above technical solution will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] To address the technical problems of difficult suspension and poor coating quality when powder coating workpieces without holes, this embodiment discloses a powder coating hanger for workpieces without holes and attached studs, including a hanging plate 1, a fixing tube 2, and a protective sleeve. In this embodiment, as shown... Figure 3 As shown, the holeless studded workpiece includes a sheet metal part consisting of a base plate 3 and two studs 4; specifically, the studs 4 are M8×67, and the two studs 4 are symmetrically fixed on the base plate 3 with a spacing of 130±0.3mm.

[0019] To ensure stable mounting of the holeless studded workpiece on the mounting plate, such as Figure 1 As shown, a fixing tube 2 with a hole penetrating through the mounting plate 1 is fixed on the mounting plate. In this embodiment, according to the size specifications of the workpiece without holes and studs, two fixing tubes 2 are fixed on the mounting plate corresponding to the workpiece studs 4, with a specification of Φ12×47 and a spacing of 130±0.3mm; at the same time, the diameter of the hole of the fixing tube 2 is 10mm and it is clearance-fitted with the workpiece stud 4, so that the workpiece stud 4 can be fully inserted into the hole of the fixing tube according to the fitting size, protecting the threads on the workpiece stud from being sprayed, which would affect the use of the workpiece without holes and studs later. Preferably, the corresponding mounting plate and fixing tube are made of metal materials, the mounting plate 1 is a metal steel plate and the fixing tube 2 is a metal steel pipe, so that static electricity can be effectively introduced into the workpiece through the metal mounting plate 1 and fixing tube 2, thereby realizing that the powder coating is uniformly adsorbed on the surface of the workpiece under the action of the electric field during powder spraying. However, considering that excessive contact between the fixing tube 2 or the mounting plate 1 and the workpiece stud 4 would reduce the spraying area on the workpiece surface and affect the powder coating layer, the port at each end of the fixing tube 2 that abuts against the workpiece stud is a pointed end 5, such as... Figure 2As shown, the workpiece stud is inserted into the fixing tube 2 from the tip 5, so that the tip 5 only contacts the inner side of the workpiece. The fixing tube 2 can support the workpiece base plate 3 to prevent it from being hit by the hanging plate. While reducing the contact area between the workpiece and the hanger, the connection point between the fixing tube 2 and the powder coating layer after powder spraying on the workpiece surface is also reduced, preventing the powder coating layer from sticking the fixing tube 2 to the workpiece, making it convenient to remove the workpiece from the hanger.

[0020] Furthermore, to secure the workpiece stud 4 within the hole of the fixing tube 2 and prevent the workpiece from slipping off the hanger, thereby achieving workpiece installation, in this embodiment, as follows: Figure 2 As shown, a 67mm long workpiece stud 4 is inserted into a 47mm long fixing tube 2, with a 20mm protruding end. A protective sleeve is fitted at the protruding end to stably fix the workpiece stud in the hole of the fixing tube 2. Specifically, the protective sleeve includes a high-temperature silicone protective sleeve 6 with an inner diameter 0.3-0.4mm smaller than the outer diameter of the workpiece stud 4 and an outer diameter larger than the inner diameter of the fixing tube 2. Due to the elasticity of the high-temperature silicone protective sleeve 6, it is interference-fitted onto the protruding end of the workpiece stud 4, ensuring stable mounting of the workpiece on the fixture. Simultaneously, due to the high-temperature resistance of the high-temperature silicone protective sleeve 6, the coating layer processed on the powder coating line will not adhere to the high-temperature silicone protective sleeve 6, allowing for easy removal after workpiece powder coating. This is environmentally friendly, simplifies the powder coating process for workpieces without holes and studs, and improves work efficiency.

[0021] Considering that the mounting plate 1 needs to be suspended on the spraying mobile suspension chain for mobile spraying, two Φ12 circular holes 7 are opened on the top of the mounting plate 1, so that the mounting plate 1 carrying the workpiece without holes and attached studs can be installed on the spraying mobile suspension chain via hooks. In addition, to improve the powder spraying efficiency, several groups of fixing pipes with two fixing pipes 2 are fixed on the mounting plate 1, and the fixing pipes in each group are arranged in an array at intervals along the length of the mounting plate, such as... Figure 1 As shown, a single mounting plate can carry five workpieces simultaneously for spraying along the moving suspension chain. Meanwhile, considering that powder coating is performed by three spray guns located on both sides of the mounting plate in an alternating manner, to ensure complete coating of the workpiece surface, therefore, in this embodiment, as... Figure 1 As shown, a spraying window 8 is provided on the mounting plate 1 at the position corresponding to the bottom plate 3 of the workpiece. Specifically, the spraying window 8 includes a number of openings spaced apart along the length of the mounting plate, and each set of fixed tubes is arrayed around each opening, so that the powder mist particles sprayed from the spray gun can be evenly adsorbed onto the surface of the workpiece through the spraying window 8, thereby improving the spraying quality.

[0022] After the workpiece is installed on the hanger, its weight is mainly borne by the hanging plate 1, while the high-temperature silicone protective sleeve 6 serves to fix the workpiece. The structure is simple and inexpensive. Specifically, due to the weight of the workpiece base plate 3, the hanger and the workpiece will tilt to the right. However, since the center of gravity is located in the middle of the two, the tilt angle is small, and the relative slippage force is also minimal. With the anti-slip effect provided by the high-temperature silicone protective sleeve 6, the slippage force is much smaller than the friction between the workpiece stud 4 and the high-temperature silicone protective sleeve 6, ensuring the stable installation of the workpiece.

[0023] Although some preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0024] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of its inventive concept. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A powder coating fixture for workpieces without holes and studs, characterized in that, The device includes a mounting plate arrayed with several spraying openings, several fixing tubes arrayed and fixed around the mounting plate corresponding to each spraying opening and used for correspondingly inserting workpiece studs, and a protective sleeve that is interference-fitted to the end of the workpiece stud extending out of the fixing tube and used to relatively fix the workpiece stud inside the fixing tube; the tube hole of the fixing tube passes through the mounting plate and is clearance-fitted with the workpiece stud, and the sum of the thickness of the fixing tube and the mounting plate is less than the length of the workpiece stud.

2. The powder coating fixture for workpieces without holes and studs according to claim 1, characterized in that, The port of each of the fixing tubes that abuts against the workpiece stud is a pointed end.

3. The powder coating fixture for workpieces without holes and studs according to claim 2, characterized in that, Each of the aforementioned fixing tubes is divided into several groups, and the number of fixing tubes in each group matches the number of studs in a single non-hole studded workpiece.

4. The powder coating fixture for workpieces without holes and studs according to claim 1, characterized in that, The hanging plate includes a hanging hole at the top, through which a hook for connecting a spraying mobile suspension chain is inserted.

5. The powder coating fixture for workpieces without holes and studs according to claim 1, characterized in that, The protective sleeve is a high-temperature silicone protective sleeve with an inner diameter 0.3 to 0.4 mm smaller than the outer diameter of the workpiece stud and an outer diameter larger than the inner diameter of the fixing tube.

Images