Electrostatic powder spraying device

Abstract

The utility model discloses an electrostatic powder spraying device which comprises an electrostatic spraying box, a conductive part is arranged in the electrostatic spraying box and used for supporting a one-way carbon fiber belt, a powder spraying part is arranged above the conductive part, a feeding port and a discharging port are formed in the two opposite side walls of the electrostatic spraying box respectively, and the feeding port and the discharging port are communicated with each other according to the running direction of the one-way carbon fiber belt. The one-way carbon fiber belt sequentially passes through the feed port, the conductive part and the discharge port; and a powder collecting box communicated with the electrostatic spraying box is arranged at the lower end of the electrostatic spraying box. Thus, the one-way carbon fiber belt is fully electrified through the conductive part, sprayed powder can be more uniformly adsorbed to the surface of the one-way carbon fiber belt, the spraying uniformity and efficiency are improved, the surface of the carbon fiber belt is smoother, and the mechanical property of the composite material is improved; and the powder which is not adsorbed by the one-way carbon fiber belt can fall into the powder collecting box below, so that the powder can be recycled, the waste of the spraying powder is reduced, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electrostatic spraying, in particular to an electrostatic powder spraying device. Background Art

[0002] One of the current hot research directions of carbon fiber reinforced resin-based composites is to apply a shaping agent on the surface of unidirectional carbon fiber tape through electrostatic powder spraying technology, and then use it as raw material through liquid molding process to prepare carbon fiber reinforced resin-based composites.

[0003] However, the unidirectional carbon fiber tape electrostatic spraying device in the prior art is prone to powder leakage and uneven powder spraying during the electrostatic spraying process, which makes the surface of the unidirectional carbon fiber tape uneven, and ultimately affects the mechanical properties of the composite material. At the same time, in order to ensure the coverage effect of the spraying and to ensure that the surface of the unidirectional fiber tape can be completely covered, the workers usually use more powder than the actual demand during the spraying process. Therefore, a large amount of excess powder will be wasted, and the consumption of powder increases the production cost. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an electrostatic powder spraying device.

[0005] The utility model provides an electrostatic powder spraying device, comprising:

[0006] An electrostatic spray box, wherein a conductive part is provided in the electrostatic spray box, the conductive part is used to support the unidirectional carbon fiber tape and make the unidirectional carbon fiber tape fully charged, and a powder spraying part is provided above the conductive part, the powder spraying part is used to spray powder downward onto the unidirectional carbon fiber tape;

[0007] A feed port and a discharge port are respectively provided on two opposite side walls of the electrostatic spray box, and according to the running direction of the unidirectional carbon fiber tape, the unidirectional carbon fiber tape passes through the feed port, the conductive part and the discharge port in sequence;

[0008] A powder collecting box connected to the electrostatic spraying box is arranged at the lower end of the electrostatic spraying box, and the powder that is not adsorbed after passing through the unidirectional carbon fiber tape falls into the powder collecting box.

[0009] In some embodiments of the present disclosure, in the height direction of the electrostatic spray box, the height of the conductive part is higher than the heights of the feed port and the discharge port.

[0010] In some embodiments of the present disclosure, the conductive part includes a conductive roller, and the axial direction of the conductive roller is arranged parallel to the extension direction of the opening length of the feed port and the discharge port.

[0011] In some embodiments of the present disclosure, an axial length of the conductive roller is greater than or equal to a width of the unidirectional carbon fiber tape.

[0012] In some embodiments of the present disclosure, the opening lengths of the feed port and the discharge port are greater than or equal to the width of the unidirectional carbon fiber tape.

[0013] In some embodiments of the present disclosure, the powder spraying part includes a spray gun and a connecting pipe arranged outside the electrostatic spray box, the spray gun is connected to the upper end surface of the electrostatic spray box, one end of the connecting pipe is connected to the spray gun, and the other end of the connecting pipe is connected to the powder feeder, and the nozzle of the spray gun is set toward the conductive roller.

[0014] In some embodiments of the present disclosure, the axis of the spray gun passes through the axis of the conductive roller.

[0015] In some embodiments of the present disclosure, the cross-sectional area of ​​the powder collection box gradually decreases from one end close to the electrostatic spray box to an end away from the electrostatic spray box, and a hinge door assembly is provided at the point where the cross-sectional area of ​​the powder collection box is the smallest.

[0016] In some embodiments of the present disclosure, the hinge door assembly includes a left door leaf and a right door leaf, the left door leaf is rotatably connected to the first side edge of the lower end surface of the powder collection box through a first hinge, and the right door leaf is rotatably connected to the second side edge of the lower end surface of the powder collection box through a second hinge, wherein the first side edge and the second side edge are arranged opposite to each other.

[0017] In some embodiments of the present disclosure, a door catch is provided at the connection between the left door leaf and the right door leaf, and the door catch is used to realize the closing and opening of the left door leaf and the right door leaf.

[0018] The electrostatic powder spraying device provided by the utility model has at least the following advantages:

[0019] The electrostatic powder spraying device provided by the utility model, after the unidirectional carbon fiber tape enters through the feed port, the unidirectional carbon fiber tape is fully charged through the conductive part, so that the sprayed powder will be more easily adsorbed onto the surface of the unidirectional carbon fiber tape, thereby ensuring that the powder sprayed on the surface of the unidirectional carbon fiber tape is more uniform, improving the uniformity and efficiency of the spraying, and the uniform spraying makes the surface of the carbon fiber tape smoother, thereby improving the mechanical properties of the composite material. The unidirectional carbon fiber tape passes through the feed port, the conductive part and the discharge port in sequence according to a specific running direction, providing an open and continuous running path for the unidirectional carbon fiber tape, and the unidirectional carbon fiber tape maintains continuous movement during the spraying process, so that the electrostatic powder spraying device can adapt to the spraying requirements of carbon fiber tapes of different lengths and widths, thereby improving the flexibility and applicability of the device. At the same time, the powder not adsorbed by the unidirectional carbon fiber tape will fall into the powder collection box below, so that the powder can be easily recycled and reused, reducing the waste of spray powder and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use 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 work.

[0021] Figure 1 A schematic diagram of the overall structure of an electrostatic powder spraying device provided by an exemplary embodiment of the utility model;

[0022] Figure 2 A schematic cross-sectional view of an electrostatic powder spraying device provided by an exemplary embodiment of the utility model;

[0023] Figure 3 A schematic structural diagram of a hinge door assembly provided for an exemplary embodiment of the utility model.

[0024] The following are marked in the accompanying drawings:

[0025] 1. Electrostatic spray box; 101. Feed inlet; 102. Discharge outlet; 2. Unidirectional carbon fiber tape; 3. Conductive roller; 4. Powder collection box; 5. Spray gun; 6. Left door leaf; 601. First hinge; 7. Right door leaf; 701. Second hinge; 8. Door buckle. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the protection scope of the utility model.

[0027] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] One of the current hot research directions of carbon fiber reinforced resin-based composites is to apply a shaping agent on the surface of unidirectional carbon fiber tape through electrostatic powder spraying technology, and then use it as raw material through liquid molding process to prepare carbon fiber reinforced resin-based composites.

[0029] However, the unidirectional carbon fiber tape electrostatic spraying device in the prior art is prone to powder leakage and uneven powder spraying during the electrostatic spraying process, which makes the surface of the unidirectional carbon fiber tape uneven, and ultimately affects the mechanical properties of the composite material. At the same time, in order to ensure the coverage effect of the spraying and to ensure that the surface of the unidirectional fiber tape can be completely covered, the workers usually use more powder than the actual demand during the spraying process. Therefore, a large amount of excess powder will be wasted, and the consumption of powder increases the production cost.

[0030] Combine the following Figure 1-Figure 3 The embodiments of the present utility model are further described.

[0031] In order to solve the above technical problems, the utility model provides an electrostatic powder spraying device, in which a conductive part is arranged in the electrostatic spraying box, and the unidirectional carbon fiber tape is laid on the conductive part after entering through the feed port, and the unidirectional carbon fiber tape is fully charged by the conductive part, so that the sprayed powder will be more easily adsorbed on the surface of the unidirectional carbon fiber tape, thereby ensuring that the powder sprayed on the surface of the unidirectional carbon fiber tape is more uniform, improving the uniformity and efficiency of the spraying, and the uniform spraying makes the surface of the carbon fiber tape smoother, thereby improving the mechanical properties of the composite material. The unidirectional carbon fiber tape passes through the feed port, the conductive part and the discharge port in sequence according to a specific running direction, so that the electrostatic powder spraying device can adapt to the spraying requirements of carbon fiber tapes of different lengths and widths, and improves the flexibility and applicability of the device. At the same time, the powder not adsorbed by the unidirectional carbon fiber tape will fall into the powder collection box below, so that the powder can be easily recycled and reused, reducing the waste of spray powder and reducing production costs.

[0032] An exemplary embodiment of the present disclosure provides an electrostatic powder spraying device, referring to Figure 1 , including an electrostatic spray box 1, wherein the electrostatic spray box 1 can be in the shape of a column or other polyhedron, and is not specifically limited in this embodiment. By way of example, the electrostatic spray box 1 adopts a rectangular parallelepiped structure with a length of 600 mm, a width of 400 mm, and a height of 400 mm, and the material of the electrostatic spray box 1 adopts Q235 steel. A conductive part is provided in the electrostatic spray box 1, and the conductive part is used to support the unidirectional carbon fiber tape 2 and make the unidirectional carbon fiber tape 2 fully charged, wherein the conductive part can adopt a conductive roller 3, a conductive slider or a conductive brush and other structures. A powder spraying part is provided above the conductive part, and the powder spraying part is used to spray powder downward onto the unidirectional carbon fiber tape 2. In this way, a conductive part is set in the electrostatic spray box 1, and the unidirectional carbon fiber tape 2 enters through the feed port 101 and is laid on the conductive part. The unidirectional carbon fiber tape 2 is fully charged by the conductive part, so that the sprayed powder can be more easily adsorbed onto the surface of the unidirectional carbon fiber tape 2, thereby ensuring that the powder sprayed on the surface of the unidirectional carbon fiber tape 2 is more uniform, improving the uniformity and efficiency of the spraying, and the uniform spraying makes the surface of the carbon fiber tape smoother, thereby improving the mechanical properties of the composite material.

[0033] A feed port 101 and a discharge port 102 are respectively provided on two opposite side walls of the electrostatic spray box 1. According to the running direction of the unidirectional carbon fiber tape 2, the unidirectional carbon fiber tape 2 passes through the feed port 101, the conductive part and the discharge port 102 in sequence. In this way, the unidirectional carbon fiber tape 2 passes through the feed port 101, the conductive part and the discharge port 102 in sequence according to a specific running direction. By arranging the feed port 101 and the discharge port 102 on opposite sides of the electrostatic spray box 1, an open and continuous running path can be provided for the unidirectional carbon fiber tape 2. The unidirectional carbon fiber tape 2 maintains continuous movement during the spraying process without interruption, thereby improving production efficiency, so that the electrostatic spray powder device can adapt to the spraying requirements of unidirectional carbon fiber tapes 2 of different lengths. At the same time, the feed port 101 and the discharge port 102 are set to a certain width. In order to prevent the unidirectional carbon fiber tape 2 from folding during the spraying process, the unidirectional carbon fiber tape 2 with a width less than or equal to the length of the feed port 101 and the discharge port 102 can enter the electrostatic spray box 1 for spraying, so that the electrostatic spray powder device can adapt to the spraying requirements of unidirectional carbon fiber tapes 2 of different widths, thereby improving the flexibility and applicability of the device. A powder collection box 4 connected to the electrostatic spray box 1 is provided at the lower end of the electrostatic spray box 1, and the powder that is not adsorbed after passing through the unidirectional carbon fiber tape 2 falls into the powder collection box 4. For example, the material of the powder collection box 4 is Q235 steel, and the powder collection box 4 adopts a four-sided pyramid structure design, wherein the electrostatic spray box 1 and the powder collection box 4 can be an integrally formed structure, or can be connected by welding or the like. In this way, the powder that is not absorbed by the unidirectional carbon fiber tape 2 will fall into the powder collection box 4 below the conductive part, so that the powder can be easily recycled and reused, thereby reducing the waste of spraying powder and lowering the production cost.

[0034] In some embodiments of the present invention, referring to Figure 1 and Figure 2 In the height direction of the electrostatic spray box 1, the height of the conductive part is higher than the height of the feed port 101 and the discharge port 102. In this way, the higher height of the conductive part can increase the area of ​​the unidirectional carbon fiber tape 2 entering the electrostatic spray box 1, increase the area and time of contact between the powder and the unidirectional carbon fiber tape 2, and the powder can be more widely attached to the unidirectional carbon fiber tape 2, thereby improving the uniformity and efficiency of spraying, reducing the waste of powder, shortening the spraying time, improving production efficiency, and helping to form a more uniform and denser coating.

[0035] In some embodiments of the present invention, referring to Figure 1 and Figure 2The conductive part includes a conductive roller 3, and the axial direction of the conductive roller 3 is arranged parallel to the extension direction of the opening length of the feed port 101 and the discharge port 102. In this way, the axial direction of the conductive roller 3 is parallel to the opening direction of the feed port 101 and the discharge port 102, and the moving direction of the unidirectional carbon fiber tape 2 is consistent with the spraying path when entering and leaving the electrostatic spraying box 1, which helps to ensure the continuity and uniformity of the spraying process, reduce the fluctuation of the spraying quality caused by the change of direction, and help to reduce the uneven spraying phenomenon caused by the deviation of the unidirectional carbon fiber tape 2, and improve the spraying quality.

[0036] In some embodiments of the present invention, referring to Figure 1 and Figure 2 , the axial length of the conductive roller 3 is greater than or equal to the width of the unidirectional carbon fiber tape 2. Exemplarily, the two ends of the conductive roller 3 are rotatably connected to the side wall of the electrostatic spray box 1 through bearings and other structures. In this way, it can be ensured that the unidirectional carbon fiber tape 2 can be completely covered on the conductive roller 3, and the surface electrostatic distribution of the unidirectional carbon fiber tape 2 is uniform, which helps to achieve more uniform powder adhesion during the spraying process, thereby obtaining a more uniform coating effect and reducing spraying defects caused by uneven electrostatic distribution, such as uneven coating thickness, uneven surface of the unidirectional carbon fiber tape 2, and other problems.

[0037] In some embodiments of the present invention, referring to Figure 1 and Figure 2 , the opening lengths of the feed port 101 and the discharge port 102 are greater than or equal to the width of the unidirectional carbon fiber tape 2. In this way, it is possible to ensure that the unidirectional carbon fiber tape 2 passes through the feed port 101 and the discharge port 102 completely without hindrance, reducing the jamming, blockage or folding caused by the mismatched width, maintaining its original flatness and integrity, and thus making the powder spraying more uniform, ensuring the surface flatness of the unidirectional carbon fiber tape 2.

[0038] In some embodiments of the present invention, referring to Figure 1 and Figure 2 The powder spraying part includes a spray gun 5 and a connecting pipe arranged outside the electrostatic spray box 1. The spray gun 5 is connected to the upper end surface of the electrostatic spray box 1, one end of the connecting pipe is connected to the spray gun 5, and the other end of the connecting pipe is connected to the powder feeder. The nozzle of the spray gun 5 is set toward the conductive roller 3.

[0039] In some embodiments of the present invention, referring to Figure 1 and Figure 2, the axis of the spray gun 5 passes through the axis of the conductive roller 3. It can be understood that the spray gun 5 is set at the center of the top surface of the electrostatic spray box 1, and the conductive roller 3 is set just below the spray gun 5. In this way, it can ensure that the spray powder is directly and accurately sprayed onto the unidirectional carbon fiber tape 2 covered on the conductive roller 3, reducing the waste of paint and ensuring the uniformity and consistency of the coating. The distribution of the spray powder on the carbon fiber tape is more uniform, and the coating quality is improved.

[0040] In some embodiments of the present invention, referring to Figure 1 and Figure 2 , the cross-sectional area of ​​the powder collection box 4 gradually decreases from one end close to the electrostatic spray box 1 to the end away from the electrostatic spray box 1, and a hinge door assembly is provided at the point where the cross-sectional area of ​​the powder collection box 4 is the smallest. Exemplarily, the material of the powder collection box 4 is Q235 steel, the powder collection box 4 is designed in a quadrangular pyramidal structure, the upper end surface of the powder collection box 4 is connected to the electrostatic spray box 1, and a hinge door assembly is provided on the lower end surface of the powder collection box 4, and the spray powder in the powder collection box 4 can be reused by opening the hinge door assembly. In this way, the gradual reduction of the cross-sectional area of ​​the powder collection box 4 helps to form a concentrated flow of powder, so that the powder can be more effectively collected at the bottom of the box or a designated area, thereby improving the collection efficiency. The hinge door assembly is provided at the point where the cross-sectional area is the smallest, so that the collection box can be easily opened and closed for cleaning and maintenance. When the powder in the collection box accumulates to a certain extent, the operator can open the hinge door assembly and easily take out or clean the powder, thereby reducing the difficulty of operation and working time.

[0041] In some embodiments of the present invention, referring to Figure 1 and Figure 3 The hinged door assembly includes a left door leaf 6 and a right door leaf 7, wherein the left door leaf 6 is rotatably connected to the first side edge of the lower end surface of the powder collection box 4 through a first hinge 601, and the right door leaf 7 is rotatably connected to the second side edge of the lower end surface of the powder collection box 4 through a second hinge 701, wherein the first side edge is arranged opposite to the second side edge. Wherein, sealing strips are arranged on the outer peripheral sides of the left door leaf 6 and the right door leaf 7, which is conducive to ensuring the sealing of the left door leaf 6 and the right door leaf 7 when they are closed. In this way, the left door leaf 6 and the right door leaf 7 are rotatably connected to the two sides of the lower end surface of the powder collection box 4 through hinges, respectively, so that the opening and closing of the door leaf becomes simple and flexible, and the operator can easily operate the door leaf from both sides to perform operations such as cleaning or maintenance of the powder. At the same time, by connecting the first hinge 601 and the second hinge 701, better sealing can be achieved, which helps to prevent the powder from leaking out from the door gap during the collection process, and keep the environment in the powder collection box 4 clean and the collection effect.

[0042] In some embodiments of the present invention, referring to Figure 1 and Figure 3 A door buckle 8 is provided at the connection between the left door leaf 6 and the right door leaf 7, and the door buckle 8 is used to realize the closing and opening of the left door leaf 6 and the right door leaf 7. In this way, the door buckle 8 can ensure that the left door leaf 6 and the right door leaf 7 fit tightly when closed, ensure the sealing of the door leaf when closed, prevent the door leaf from being loosened due to accidental opening or external factors, increase the safety of the powder collection box 4, and prevent powder leakage.

[0043] The contents described above can be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present utility model.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. An electrostatic powder spraying device, characterized in that: It comprises an electrostatic spray box, wherein a conductive part is provided in the electrostatic spray box, the conductive part is used to support the unidirectional carbon fiber tape and make the unidirectional carbon fiber tape fully charged, and a powder spraying part is provided above the conductive part, the powder spraying part is used to spray powder downward onto the unidirectional carbon fiber tape; A feed port and a discharge port are respectively provided on two opposite side walls of the electrostatic spray box, and according to the running direction of the unidirectional carbon fiber tape, the unidirectional carbon fiber tape passes through the feed port, the conductive part and the discharge port in sequence; A powder collecting box connected to the electrostatic spraying box is arranged at the lower end of the electrostatic spraying box, and the powder that is not adsorbed after passing through the unidirectional carbon fiber tape falls into the powder collecting box.

2. The electrostatic powder spraying device according to claim 1, characterized in that: In the height direction of the electrostatic spray box, the height of the conductive part is higher than the heights of the feed port and the discharge port.

3. The electrostatic powder spraying device according to claim 1, characterized in that: The conductive part comprises a conductive roller, and the axial direction of the conductive roller is arranged parallel to the extension direction of the opening lengths of the feed port and the discharge port.

4. The electrostatic powder spraying device according to claim 3, characterized in that: The axial length of the conductive roller is greater than or equal to the width of the unidirectional carbon fiber tape.

5. The electrostatic powder spraying device according to claim 1, characterized in that: The opening lengths of the feed port and the discharge port are greater than or equal to the width of the unidirectional carbon fiber tape.

6. The electrostatic powder spraying device according to claim 3, characterized in that: The powder spraying part includes a spray gun and a connecting pipe arranged outside the electrostatic spray box, the spray gun is connected to the upper end surface of the electrostatic spray box, one end of the connecting pipe is connected to the spray gun, and the other end of the connecting pipe is connected to the powder feeder, and the nozzle of the spray gun is set toward the conductive roller.

7. The electrostatic powder spraying device according to claim 6, characterized in that: The axis of the spray gun passes through the axis of the conductive roller.

8. The electrostatic powder spraying device according to claim 1, characterized in that: The cross-sectional area of ​​the powder collection box gradually decreases from one end close to the electrostatic spraying box to one end away from the electrostatic spraying box, and a hinge door assembly is arranged at the position where the cross-sectional area of ​​the powder collection box is the smallest.

9. The electrostatic powder spraying device according to claim 8, characterized in that: The hinge door assembly includes a left door leaf and a right door leaf, the left door leaf is rotatably connected to the first side edge of the lower end surface of the powder collection box through a first hinge, and the right door leaf is rotatably connected to the second side edge of the lower end surface of the powder collection box through a second hinge, wherein the first side edge and the second side edge are arranged opposite to each other.

10. The electrostatic powder spraying device according to claim 9, characterized in that: A door catch is provided at the connection between the left door leaf and the right door leaf, and the door catch is used to realize the closing and opening of the left door leaf and the right door leaf.

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