A spraying masking tool for automobile plastic parts

Abstract

The utility model relates to tooling field especially relates to a kind of glue spraying masking tooling of automobile plastic parts, the plastic part includes plate body, the top surface of the plate body is equipped with sunken groove, the top of the plate body is equipped with a plurality of heat dissipation holes at one end of sunken groove, and partition is equipped between adjacent heat dissipation holes, the top of the plate body is integrally provided with annular protruding portion around the edge of heat dissipation hole, including shielding body, the bottom of the shielding body is equipped with the profiled surface cooperation with annular protruding portion top surface, the bottom edge of the shielding body is equipped with the annular shielding portion cooperation with annular protruding portion side wall, the glue spraying masking tooling of this automobile plastic part, completely avoid glue liquid to block heat dissipation hole, ensure that the heat dissipation passage of the internal wiring harness, electronic component of cover plate is unobstructed, eliminate the security risk caused by local overheating, guarantee product functionality and use safety.

Description

Technical Field

[0001] This utility model relates to the field of tooling, and in particular to a tooling for spraying adhesive and masking automotive plastic parts. Background Technology

[0002] In automotive interior parts production, the WPC cover plate for the P181 model often needs to be bonded and fixed to other components using a spray adhesive process. This cover plate is designed with multiple functional ventilation holes to ensure the heat dissipation requirements of internal wiring harnesses or electronic components.

[0003] In existing technologies, adhesive spraying is typically performed directly on unprotected cover plates. Due to the spraying pressure and adhesive flowability, the adhesive can easily enter the heat dissipation holes via airflow or splashing. Once the adhesive solidifies inside the heat dissipation holes, the following problems will occur: (1) Blocking the heat dissipation channel affects the heat dissipation performance of internal components, which may cause local overheating or even safety hazards; (2) Additional manual cleaning of residual adhesive in the heat dissipation holes is required during subsequent assembly, which increases process costs and time; (3) If the residual adhesive is not completely removed, it may cause wire harness wear or poor contact, ultimately resulting in product functional defects.

[0004] Therefore, it is necessary to provide a spray masking fixture for automotive plastic parts to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a spray adhesive masking fixture for automotive plastic parts.

[0006] This utility model provides a spray adhesive masking fixture for automotive plastic parts. The plastic part includes a plate body. The top surface of the plate body is provided with a recessed groove. The top of the plate body is provided with a plurality of heat dissipation holes at one end of the recessed groove, and a partition is provided between adjacent heat dissipation holes. The top of the plate body is integrally provided with an annular protrusion around the edge of the heat dissipation holes, including a shielding body. The bottom of the shielding body is provided with a contoured surface that mates with the top surface of the annular protrusion. The bottom edge of the shielding body is provided with an annular shielding part that mates with the side wall of the annular protrusion. The top of the shielding body is provided with a plurality of positioning pins that interlock with the heat dissipation holes.

[0007] Preferably, the end edge of the positioning pin is rounded to reduce insertion resistance.

[0008] Preferably, the annular protrusion and the annular blocking portion are interference-fitted, resulting in a good sealing effect.

[0009] Preferably, the top of the shield is provided with a hand handle for easy handling of the tooling.

[0010] Preferably, when the tooling is installed on the automotive plastic part, the bottom of the annular shielding part contacts the upper surface of the plate, resulting in a good sealing effect.

[0011] Positioning and assembly: During operation, align the positioning pin on the top of the shield with the heat dissipation hole on the cover plate and insert it. The rounded corner at the end of the positioning pin can reduce the insertion resistance and avoid scratching the inner wall of the heat dissipation hole, while achieving the initial accurate positioning of the tooling and the cover plate. Sealing and fitting: The contoured surface at the bottom of the shielding body is completely fitted with the top surface of the annular protrusion on the plate, and the annular shielding part and the annular protrusion form an interference fit. At the same time, the bottom of the annular shielding part is in close contact with the upper surface of the plate, forming a sealing barrier from three dimensions: top surface, side wall, and bottom. Adhesive spray protection: After the tooling is installed, during the adhesive spraying operation, the adhesive cannot enter the heat dissipation holes through airflow or flow. After the adhesive has cured, the tooling can be easily removed by holding the handle to complete the protection operation.

[0012] Compared with related technologies, the present invention provides the following beneficial effects: Ensure product performance: Completely prevent adhesive from clogging the heat dissipation holes, ensure unobstructed heat dissipation channels for wiring harnesses and electronic components inside the cover plate, eliminate safety hazards caused by local overheating, and ensure product functionality and safety in use; Reduce production costs: Eliminate the subsequent manual cleaning of residual adhesive in heat dissipation holes, reducing labor costs and time consumption, while avoiding product defects such as wire harness wear and poor contact caused by residual adhesive, thus reducing the defect rate and rework costs. Improve work efficiency: The tooling is quickly positioned by positioning pins and can be easily disassembled and assembled by hand levers. It is simple and efficient to operate, requires no complicated debugging, and can be directly integrated into the existing glue spraying process without adding any extra work steps. High adaptability: The contoured surface of the shield and the annular shielding part are precisely matched with the annular protrusion of the cover plate. The interference fit design ensures the sealing effect and can stably adapt to the mass production requirements of the P181 model WPC cover plate. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the plastic part structure of this utility model; Figure 2 For the present utility model Figure 1 Enlarged view of region A in the middle; Figure 3 This is a schematic diagram of the tooling of this utility model; Figure 4 This is a schematic diagram showing the tooling of this utility model after it has been actually installed on a plastic part.

[0014] The following are labeled in the diagram: 1. Plate; 2. Recessed groove; 3. Heat dissipation hole; 4. Partition; 5. Annular protrusion; 6. Shield; 7. Contour surface; 8. Annular shield; 9. Positioning pin; 10. Rounded corner; 11. Hand handle. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Please refer to the following: Figures 1-4 A spray masking fixture for automotive plastic parts is disclosed. The main body of the automotive plastic part to which the fixture is adapted is a plate 1. A recessed groove 2 is provided on the top surface of the plate 1. Several heat dissipation holes 3 are densely arranged on the top of the plate 1 and at one end of the recessed groove 2. Adjacent heat dissipation holes 3 are separated by an integrally formed partition 4 to form an independent heat dissipation channel. An annular protrusion 5 is also integrally formed on the top surface of the plate 1 around the outer edge of all the heat dissipation holes 3. The annular protrusion 5 and the plate 1 are integrally formed, which enhances the structural stability.

[0017] The core component of this adhesive spraying masking fixture is the masking body 6: the bottom end face of the masking body 6 is machined with a contoured surface 7, the contour of which is perfectly matched with the top contour of the annular protrusion 5, enabling precise fitting between the two; the bottom edge of the masking body 6 is integrally formed with an annular masking part 8, the inner sidewall of which can fit with the outer sidewall of the annular protrusion 5 to form a sidewall sealing structure; the top of the masking body 6 also extends downward with several positioning pins 9, the number and position of which correspond one-to-one with the heat dissipation holes 3, and can be inserted and cooperated with the heat dissipation holes 3 to achieve precise positioning of the fixture.

[0018] Preferably, the insertion end edge of the positioning pin 9 is machined with a rounded corner 10. This design can effectively reduce the resistance when the positioning pin 9 is inserted into the heat dissipation hole 3, making the assembly process smoother, and can also prevent the positioning pin 9 from scratching the inner wall of the heat dissipation hole 3, protecting the original structure of the plastic part. Preferably, the annular protrusion 5 and the annular shield 8 are connected by an interference fit, with no gap between the mating surfaces, which can significantly improve the sealing effect and prevent the adhesive from seeping in from the side wall gaps. Preferably, the top of the shield 6 is integrally fixed with a hand handle 11, which can be used by the operator to easily complete the tooling pick-up and drop operations, greatly improving the work efficiency. Preferably, when the tooling is fully installed on the plastic part, the bottom end face of the annular shield 8 can be in close contact with the top surface of the plate 1, further sealing the sealing gap from the bottom and forming a multi-dimensional seal.

[0019] The specific operating procedure for this tooling is as follows: 1. Positioning and assembly Before applying the adhesive, the operator aligns the positioning pin 9 on the top of the shield 6 with the corresponding heat dissipation hole 3 on the plate 1 and slowly inserts the positioning pin 9 into the heat dissipation hole 3. The rounded corner 10 at the end of the positioning pin 9 effectively reduces the resistance during insertion, avoiding structural damage caused by hard contact. At the same time, the interlocking cooperation between the positioning pin 9 and the heat dissipation hole 3 achieves the initial accurate positioning of the tooling and the plate 1, laying the foundation for subsequent sealing and bonding.

[0020] 2. Sealing and bonding As the positioning pin 9 is fully inserted into the heat dissipation hole 3, the contoured surface 7 at the bottom of the shield 6 will fit seamlessly with the top surface of the annular protrusion 5. At the same time, the inner wall of the annular shield 8 and the outer wall of the annular protrusion 5 fit tightly due to interference fit, and the bottom end face of the annular shield 8 also forms a tight contact with the upper surface of the plate 1. Finally, a complete sealing barrier is constructed from the top surface and side wall of the annular protrusion 5 and the upper surface of the plate 1, completely blocking the path of adhesive penetration.

[0021] 3. Spray adhesive protection Once the fixture is in place, the adhesive spraying operation can begin. During this process, whether the adhesive spreads through airflow or its own fluidity, it will be blocked by the multi-dimensional sealing barrier, preventing it from entering the heat dissipation hole 3, thus effectively protecting the heat dissipation hole 3. After the adhesive layer has completely cured, the operator can easily remove the fixture by simply holding the handle 11 and pulling upwards, completing the entire protective operation process.

[0022] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A spray masking fixture for automotive plastic parts, the plastic parts comprising a plate (1), the top surface of the plate (1) having a recessed groove (2), the top of the plate (1) having a plurality of heat dissipation holes (3) at one end of the recessed groove (2), and a partition (4) between adjacent heat dissipation holes (3), the top of the plate (1) having an integrally formed annular protrusion (5) around the edge of the heat dissipation holes (3), characterized in that, The shield (6) includes a bottom surface (7) that matches the top surface of the annular protrusion (5), an annular shield (8) that matches the side wall of the annular protrusion (5) at the bottom edge of the shield (6), and a number of positioning pins (9) that interlock with the heat dissipation holes (3) at the top of the shield (6).

2. The adhesive spraying masking fixture for automotive plastic parts according to claim 1, characterized in that, The end edge of the positioning pin (9) is provided with a rounded corner (10).

3. The adhesive spraying masking fixture for automotive plastic parts according to claim 1, characterized in that, The annular protrusion (5) and the annular shield (8) are interference-fitted.

4. The adhesive spraying masking fixture for automotive plastic parts according to claim 1, characterized in that, The top of the shield (6) is provided with a hand handle (11).

5. The adhesive spraying masking fixture for automotive plastic parts according to claim 1, characterized in that, When the tooling is installed on the automotive plastic parts, the bottom of the annular shield (8) contacts the upper surface of the plate (1).

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