High-uniformity automobile plastic part injection molding spraying device

Abstract

The utility model relates to the technical field of plastic part spraying treatment, and discloses a high-uniformity automobile plastic part injection molding spraying device which comprises a clamp and a spray gun, a processed plastic part is fixed by the clamp, the spray gun is arranged on the front side of a spraying surface of the processed plastic part, and the outer contour of the processed plastic part is wrapped with a negative pressure air pipe. According to the spraying device, in the spraying process of the plastic part, due to the negative pressure effect, ambient air can be sucked into the negative pressure air pipe, air flow is formed, and the plastic part is sprayed through the negative pressure air pipe; the air flow enables coating particles in the spraying process to be more evenly distributed on the surface of a processed plastic part, so that uniform processing of paint spraying is achieved, the coating floating outside the outline can be effectively sucked into the negative pressure air pipe, and the influence on the environment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of spraying treatment of plastic parts, in particular to a highly uniform injection spraying device for automobile plastic parts. Background Art

[0002] Injection molding and spraying of automotive plastic parts is a common automotive parts production process, which involves molding plastic materials into automotive parts through injection molding, and then applying a coating to their surface through spraying. This process is often used to produce automotive interior and exterior parts, such as dashboards, door handles, front and rear bumpers, etc. First, during the injection molding process of automotive plastic parts, plastic particles are heated and injected into the mold to form the desired part shape. This injection molding process has the advantages of high efficiency, precision and cost-effectiveness, so it has been widely used in automobile manufacturing. Then, after the plastic parts are injection molded, a spraying process is required to improve their surface aesthetics, wear resistance and corrosion resistance. Spraying usually includes multiple processes such as primer, color paint and varnish to ensure that the final coating has the ideal appearance and performance. The process of injection molding and spraying of automotive plastic parts requires strict control and operation to ensure that the quality and performance of the parts meet the requirements. At the same time, environmental factors need to be considered, and coatings and processes that meet relevant standards should be used to reduce the impact on the environment. The application of this process enables automotive parts to have good appearance and durability.

[0003] In the spraying process of injection molding of automobile plastic parts, primer spraying is required. The role of primer is not only to provide adhesion and uniform base color of the coating, but also to fill small surface defects and enhance the smoothness and consistency of the coating. The uniformity of primer plays a vital role in coating construction. Uniform primer can ensure that the quality and appearance of the coating are in the best state. It can reduce surface defects such as wrinkling and fish eyes of the coating, obtain a smooth and smooth coating, and improve the overall quality and appearance. However, in the existing spraying process, if the air flow in the spraying environment is restricted, it may be caused by factors such as poor ventilation around the spraying equipment. In this case, the paint particles sprayed during spraying cannot be evenly distributed on the surface of the plastic parts, but are concentrated in local areas, resulting in uneven coating. If the paint is sprayed in a ventilated environment, the air flow will drive the sprayed paint particles to spread around, especially in the case of strong wind, the paint particles in the spraying process are more likely to drift into the surrounding environment, affecting the health of the surrounding workers, such as causing respiratory problems or skin irritation. In addition, if paint particles enter machinery or other facilities, it may cause equipment failure or safety hazards. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the utility model provides a highly uniform automobile plastic parts injection spraying device, which has the advantages of being able to generate flowing airflow around the plastic parts during the spraying process of the plastic parts, making the spraying more uniform and preventing the paint from diffusing with the airflow, thereby solving the problem of uneven paint spraying caused by weak surrounding air fluidity during the existing plastic parts spraying process.

[0006] (II) Technical solution

[0007] In order to achieve the purpose of generating flowing airflow around the plastic parts during the above-mentioned plastic parts spraying process so that the spraying is uniform and the paint does not diffuse with the airflow, the utility model provides the following technical solutions: a high-uniform automobile plastic parts injection spraying device, including a clamp and a spray gun, the clamp fixes the processed plastic parts, the spray gun is arranged on the front side of the processed plastic parts spraying surface, the outer contour of the processed plastic parts is wrapped with a negative pressure air pipe, the pressure in the negative pressure air pipe is lower than the air pressure around the processed plastic parts, the negative pressure air pipe is provided with adsorption holes attached to the surface of the processed plastic parts, the adsorption holes are opened along the negative pressure air pipe array, the negative pressure air pipe is provided with negative pressure holes parallel to the direction of spraying paint by the spray gun, and the negative pressure holes are opened along the negative pressure air pipe array.

[0008] Preferably, one end of the negative pressure air pipe is connected to a cooling module, and the other end of the negative pressure air pipe is connected to an air pump module for extracting gas in the negative pressure air pipe, and the cooling module transports gas with a temperature lower than the temperature of the gas surrounding the processed plastic part into the negative pressure air pipe.

[0009] Preferably, the length of the negative pressure air pipe is set according to the maximum contour circumference of the processed plastic part.

[0010] Preferably, the negative pressure air pipe is made of rubber or silicone material.

[0011] Preferably, the diameter of the negative pressure hole is larger than the diameter of the adsorption hole, and the diameter of the negative pressure hole is smaller than the diameter of the negative pressure air pipe.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model provides a highly uniform automobile plastic parts injection spraying device, which has the following beneficial effects:

[0014] 1. This highly uniform automotive plastic parts injection spraying device uses a negative pressure air pipe structure in conjunction with a negative pressure hole structure. Compared with the traditional technical structure, the spraying device can form a gas flow during the spraying process of the plastic parts due to the negative pressure effect. The surrounding air will be sucked into the negative pressure air pipe, and this air flow will make the paint particles in the spraying process more evenly distributed on the surface of the processed plastic parts, thereby achieving uniform processing of the paint spraying. The design of the negative pressure air pipe makes its shape similar to the outer contour of the processed plastic parts, so that the paint floating outside the contour can be effectively sucked into the negative pressure air pipe and discharged. Such a design can prevent the paint from floating in the surrounding environment, thereby reducing the impact on the environment.

[0015] 2. This highly uniform automotive plastic parts injection spraying device uses an adsorption hole structure in conjunction with a negative pressure pipe structure. Compared with the traditional technical structure, this structure makes the pressure in the negative pressure air pipe lower than the surrounding gas pressure. When the adsorption holes of the negative pressure air pipe are in close contact with the surface of the processed plastic parts, the negative pressure effect will cause the air on the surface of the processed plastic parts to be sucked into the negative pressure air pipe, thereby forming an adsorption effect. This adsorption force will cause the adsorption holes to firmly adhere to the surfaces of processed plastic parts of different shapes, so that the negative pressure pipe can complete the processing of processed plastic parts of different shapes, thereby increasing the adaptability of the structure and reducing equipment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a highly uniform automobile plastic parts injection spraying device of the utility model;

[0017] Figure 2 This is a structural front view of a highly uniform automobile plastic parts injection spraying device of the utility model;

[0018] Figure 3 This is a structural side view of a highly uniform automobile plastic parts injection spraying device of the utility model;

[0019] Figure 4 This is a top view of the structure of a highly uniform automobile plastic parts injection spraying device of the utility model;

[0020] Figure 5 The utility model is a three-dimensional structural schematic diagram of a high-uniform automobile plastic part injection spraying device when the processed plastic part is not installed.

[0021] In the figure: 1- fixture, 2- spray gun, 3- processed plastic part, 4- negative pressure air pipe, 5- adsorption hole, 6- negative pressure hole, 7- cooling module, 8- air pump module. DETAILED DESCRIPTION

[0022] 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 ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 A highly uniform injection spraying device for automobile plastic parts includes a fixture 1 and a spray gun 2. The fixture 1 fixes the processed plastic part 3, and the spray gun 2 is arranged on the front side of the processed plastic part 3 before spraying. The outer contour of the processed plastic part 3 is wrapped with a negative pressure air pipe 4. The pressure in the negative pressure air pipe 4 is lower than the air pressure around the processed plastic part 3. The air pressure in the negative pressure air pipe 4 is lower than the air pressure around the processed plastic part 3. Through the negative pressure effect, the surrounding air will be sucked into the negative pressure air pipe 4 to form a gas flow. This airflow can make the paint particles in the spraying process more evenly distributed on the surface of the processed plastic part 3, thereby achieving a uniform spraying effect. In addition, the negative pressure air pipe 4 sucks the surrounding air into the pipe through the adsorption hole 5, so that the paint dispersion in the surrounding environment is reduced, reducing the pollution and waste of the paint to the environment. The negative pressure air pipe 4 is provided with adsorption holes 5 which are attached to the surface of the processed plastic part 3 , and the adsorption holes 5 are arranged in an array along the negative pressure air pipe 4 . The negative pressure air pipe 4 is provided with negative pressure holes 6 which are parallel to the direction in which the spray gun 2 sprays the paint, and the negative pressure holes 6 are arranged in an array along the negative pressure air pipe 4 .

[0024] See also Figure 1 and Figure 5, one end of the negative pressure air pipe 4 is connected to a cooling module 7, and the other end of the negative pressure air pipe 4 is connected to an air pump module 8 for extracting gas from the negative pressure air pipe 4, and the cooling module 7 transports gas with a temperature lower than the temperature of the gas around the processed plastic part 3 into the negative pressure air pipe 4. The length of the negative pressure air pipe 4 is set according to the maximum contour circumference of the processed plastic part 3. The negative pressure air pipe 4 is made of rubber or silicone. The diameter of the negative pressure hole 6 is larger than the diameter of the adsorption hole 5, and the diameter of the negative pressure hole 6 is smaller than the diameter of the negative pressure air pipe 4. The purpose of designing the diameter of the negative pressure hole 6 to be larger than the diameter of the adsorption hole 5 and the diameter of the negative pressure hole 6 to be smaller than the diameter of the negative pressure air pipe 4 is to ensure that the negative pressure effect can be effectively achieved and that the gas flow can achieve the expected effect. This design can ensure that the gas in the negative pressure air pipe 4 can be fully extracted to form a lower air pressure, thereby achieving the negative pressure effect. If the diameter of the negative pressure hole 6 is smaller than the diameter of the adsorption hole 5, the gas may not be fully extracted, reducing the intensity of the negative pressure effect and affecting the uniformity and efficiency of the spraying process. At the same time, it can ensure that the gas in the negative pressure air pipe 4 can flow to the negative pressure hole 6 to form a stronger negative pressure effect. If the diameter of the negative pressure hole 6 is larger than the diameter of the negative pressure air pipe 4, the gas flow may be dispersed, weakening the negative pressure effect and affecting the uniformity and efficiency of the spraying process.

[0025] Working principle: When in use, first clamp the processed plastic part 3 on the fixture 1, and adjust the spray gun 2 and one side of the surface of the processed plastic part 3, then set the negative pressure air pipe 4 along the processed plastic part 3 and wrap the outer contour of the processed plastic part 3, and attach the adsorption hole 5 to the non-painted surface of the processed plastic part 3, and start the air pump module 8 and the cooling module 7. Since the gas in the negative pressure air pipe 4 will be continuously extracted by the air pump module 8, and the cooling module 7 will transport low-temperature gas to the negative pressure air pipe 4, the pressure in the negative pressure air pipe 4 is lower than the surrounding gas pressure. This pressure difference will cause the gas to flow from the high-pressure area to the low-pressure area, forming a negative pressure effect. When the adsorption hole 5 of the negative pressure air pipe 4 is close to the surface of the processed plastic part 3, this negative pressure effect will cause the air on the surface of the processed plastic part 3 to be sucked into the negative pressure air pipe 4, thereby forming an adsorption effect. The adsorption holes 5 on the compressed air pipe are very close to the surface of the processed plastic part 3, and due to the negative pressure effect, the air near the surface of the processed plastic part 3 will be sucked into the adsorption holes 5, forming an adsorption force. This adsorption force will make the adsorption holes 5 firmly attached to the surface of the processed plastic part 3. When the negative pressure air pipe 4 is close to the outer contour of the processed plastic part 3, the adsorption holes 5 are closely attached to the surface of the plastic part, forming a sealed space. In this sealed space, the gas cannot escape easily, thereby maintaining the tight fit between the entire negative pressure air pipe 4 and the plastic part. Then start the spray gun 2 to process the surface of the processed plastic part 3. At this time, the negative pressure air pipe 4 can only inhale from the negative pressure hole 6 because the adsorption hole 5 is sealed by the processed plastic part 3. When the negative pressure air pipe 4 inhales from the negative pressure hole 6, due to the negative pressure effect, the surrounding air will be inhaled into the negative pressure air pipe 4, forming a gas flow. This airflow will make the paint particles in the spraying process more evenly distributed on the surface of the processed plastic part 3, thereby achieving uniform processing of the spraying. In addition, the design of the negative pressure air pipe 4 makes its shape similar to the outer contour of the processed plastic part 3, so that the paint floating outside the contour can be effectively sucked into the negative pressure air pipe 4 and discharged. Such a design can prevent the paint from floating in the surrounding environment, thereby reducing the impact on the environment.

[0026] 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 including 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 sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A highly uniform injection spraying device for automobile plastic parts, comprising a fixture (1) and a spray gun (2), wherein the fixture (1) fixes the processed plastic part (3), and the spray gun (2) is arranged on the front side of the processed plastic part (3) before spraying, characterized in that: The outer contour of the processed plastic part (3) is wrapped with a negative pressure air pipe (4), the pressure in the negative pressure air pipe (4) is lower than the air pressure around the processed plastic part (3), the negative pressure air pipe (4) is provided with adsorption holes (5) attached to the surface of the processed plastic part (3), the adsorption holes (5) are arranged along the array of the negative pressure air pipe (4), the negative pressure air pipe (4) is provided with negative pressure holes (6) parallel to the direction of spraying paint by the spray gun (2), and the negative pressure holes (6) are arranged along the array of the negative pressure air pipe (4).

2. A highly uniform automotive plastic parts injection spraying device according to claim 1, characterized in that: One end of the negative pressure air pipe (4) is connected to a cooling module (7), and the other end of the negative pressure air pipe (4) is connected to an air pump module (8) for extracting gas from the negative pressure air pipe (4). The cooling module (7) transports gas with a temperature lower than the temperature of the surrounding gas of the processed plastic part (3) into the negative pressure air pipe (4).

3. A highly uniform automotive plastic parts injection spraying device according to claim 1, characterized in that: The length of the negative pressure air pipe (4) is set according to the maximum perimeter of the processed plastic part (3).

4. A highly uniform automotive plastic parts injection spraying device according to claim 1, characterized in that: The negative pressure air pipe (4) is made of rubber or silicone material.

5. The highly uniform injection spraying device for automobile plastic parts according to claim 1, characterized in that: The diameter of the negative pressure hole (6) is larger than the diameter of the adsorption hole (5), and the diameter of the negative pressure hole (6) is smaller than the diameter of the negative pressure air pipe (4).

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