A spray painting device for injection molded parts of automobile front and rear bumpers

Abstract

This utility model relates to the field of automotive parts processing technology, specifically to a spraying processing device for injection molded automotive front and rear bumper parts. It includes a base consisting of two parallel bases. Parallel guide rods ensure smooth sliding of moving parts along a predetermined trajectory. The housing serves as the main body of the moving unit, integrating various functional modules to form a compact structure. The device achieves linear conversion through a motor-driven lead screw rotation coupled with a ball nut. The guide rods ensure the housing's movement trajectory is free of deviation. The millisecond-level response of the solenoid valve and the closed-loop feedback of the PLC controller work in synergy, enabling the nozzle to maintain a spraying start / stop position error less than the industry standard even during high-speed reciprocating motion. Compared to traditional mechanical transmission structures, this avoids the cumulative error caused by gear backlash and overcomes the end-buffering problem inherent in cylinder drives.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts processing technology, and in particular to a spraying processing device for injection molded automotive front and rear bumper parts. Background Technology

[0002] As important exterior and protective components of the car body, the front and rear bumpers of automobiles involve two key processes in their manufacturing: injection molding and surface painting. After demolding, the injection-molded plastic parts enter the painting process, which requires multiple processes such as surface cleaning, primer spraying, color paint spraying, and clear coat spraying. These bumper parts usually have complex curved shapes and fine ridge features, which place extremely high demands on the uniformity of the coating and the appearance quality. The painting process must not only ensure that the color matches perfectly with other parts of the car body, but also ensure that the coating has good weather resistance, stone impact resistance, and chemical stability.

[0003] Traditional spraying methods mainly rely on operators holding spray guns. Workers need to control the speed and distance of the spray gun based on experience. This manual operation method has many technical limitations. It is difficult for operators to maintain a completely consistent spraying angle and movement trajectory, which can easily lead to uneven coating thickness in curved and transitional areas. Complex structural parts may experience repeated spraying or missed spraying. For fine structures such as grille openings and air guide channels on the front and rear bumpers, it is even more difficult to ensure complete coating coverage by manual spraying. The technical differences between operators in different shifts can also cause quality fluctuations between product batches. This operation mode that relies on manual experience cannot meet the requirements of modern production for consistent quality, nor can it adapt to the production rhythm of rapid switching between multiple models.

[0004] As the automotive industry continues to demand higher production efficiency and quality, the limitations of traditional manual spraying methods are becoming increasingly apparent. Uneven coating thickness can affect the corrosion resistance and appearance of parts. Repeated spraying not only wastes paint but may also cause defects such as sagging. The low efficiency of manual operation has become a bottleneck for increasing production capacity. These pain points have spurred the automotive industry's urgent need for automated spraying solutions, driving the spraying process towards intelligence and precision. Utility Model Content

[0005] The purpose of this invention is to provide a spraying device for injection molded parts of automobile front and rear bumpers, which solves the problem of low efficiency in traditional manual spraying.

[0006] To achieve the above objectives, this utility model provides a spray painting device for injection-molded automotive front and rear bumper parts, including a base consisting of two parallel bases. A column is fixedly mounted on the upper end of each base, and a support plate is fixedly mounted on the inner side of each column. A motor is fixedly mounted on the right end of each support plate. A lead screw is rotatably mounted between the two support plates, and a guide rod is fixedly mounted on the lower side of the lead screw. A housing is threaded through the lead screw and guide rod. The base provides a stable support platform for the entire device, ensuring the overall structural rigidity of the equipment during high-speed movement. The column is vertically fixed to the upper end of the base, bearing the load-bearing function of connecting the upper moving mechanism to the basic frame. The support plate extends horizontally to form a cantilever structure, providing an installation plane and torque support for the rotating components. The motor, as the core power source, controls the motion parameters of the rotating components through precision transmission. The lead screw converts the rotational motion of the motor into precise linear displacement. The parallel arrangement of the guide rods ensures that the moving components slide smoothly along a predetermined trajectory. The housing, as the main body of the moving unit, integrates and accommodates various functional modules to form a compact structure.

[0007] The housing is equipped with a ball nut, which is fitted onto the lead screw. The ball nut enables efficient conversion between rotary and linear motion, reducing energy loss caused by mechanical friction.

[0008] The housing contains a control device, and the rear end of the housing contains a nozzle. The control device integrates fluid control and electrical signal processing functions to achieve real-time adjustment of spraying parameters. The nozzle, through a special flow channel design, fully mixes and atomizes the paint with compressed air to form a uniform spray surface.

[0009] The housing is provided with sleeves at both ends and an air pipe connector at the lower end, which enables a reliable connection between the compressed air pipeline and the moving parts.

[0010] The paint connector is fixedly installed on the left side of the air pipe connector, and a storage tank is fixedly installed on the right side of the base. The paint connector adopts a leak-proof design to ensure the sealing of the paint delivery pipeline, and the storage tank stores the paint to be sprayed and maintains a constant liquid level and pressure.

[0011] The upper end of the storage tank is fixedly equipped with a conveying pump, which is connected to the paint connector through a conveying pipe. The conveying pump provides stable paint conveying power and achieves adjustable flow rate.

[0012] A compressor is fixedly installed on the left side of the base. The compressor is connected to the air pipe connector through an air pipe. The compressor generates high-pressure air as the power source for spray atomization. The air pipe delivers compressed air and maintains stable pressure. The material delivery pipe connects the material storage system and the spraying unit to form a closed-loop paint circulation.

[0013] The device achieves linear conversion by rotating a lead screw driven by a motor and cooperating with a ball nut. The guide rod ensures that the movement trajectory of the housing is without deviation, so that the nozzle can maintain a spraying start and stop position error of less than the industry standard even in high-speed reciprocating motion. Compared with the traditional mechanical transmission structure, it avoids the cumulative error caused by gear backlash and overcomes the end buffering problem of cylinder drive. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the overall structure of the automotive front and rear bumper injection molding part spraying processing device according to an embodiment of the present utility model.

[0016] Figure 2 This is a schematic diagram of the spraying drive component structure according to an embodiment of the present invention.

[0017] Figure 3 This is a cross-sectional structural diagram of the nozzle assembly according to an embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the nozzle assembly structure according to an embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of the back structure of the nozzle assembly according to an embodiment of the present invention.

[0020] 1. Base, 2. Column, 3. Support plate, 4. Motor, 5. Lead screw, 6. Guide rod, 7. Housing, 8. Ball nut, 9. Control device, 10. Nozzle, 11. Pipe sleeve, 12. Air pipe connector, 13. Paint connector, 14. Feed pump, 15. Compressor, 16. Air pipe, 17. Feed pipe, 18. Storage tank. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0022] Please see Figures 1-5A painting processing device for injection molded parts of automobile front and rear bumpers includes a base 1, which consists of two parallel bases. A column 2 is fixedly installed on the upper end of the base 1, and a support plate 3 is fixedly installed on the inner side of the column 2. A reinforcing member 4 is fixedly installed between the column 2 and the base 1. A lead screw 5 is rotatably installed between the two support plates 3, and a guide rod 6 is fixedly installed on the lower side of the lead screw 5. A housing 7 is installed through the lead screw 5 and the guide rod 6. The base 1 serves as the basic support platform for the equipment, supporting the operation of the entire system through a rigid structure. The column 2 is vertically fixed on the base 1, providing an installation reference and load transmission path for the upper moving mechanism. The support plate 3 serves as a transverse support beam, ensuring the installation stability of the motor 4 and the transmission mechanism. The motor 4 drives the lead screw 5 to rotate by converting electrical energy into mechanical energy. The lead screw 5 uses the thread characteristics to convert rotational motion into linear displacement. The guide rods 6 are arranged in parallel to restrict the degrees of freedom of the moving parts to ensure the accuracy of linear motion. The housing 7 serves as a moving unit integrating components such as a control device 9 and a nozzle 10.

[0023] A ball nut 8 is fixedly installed inside the housing 7, and the ball nut 8 is sleeved on the lead screw 5. A control device 9 is fixedly installed inside the housing 7. A nozzle 10 is fixedly installed at the rear end of the housing 7. Tube sleeves 11 are fixedly installed at both ends of the housing 7. An air pipe connector 12 is fixedly installed at the lower end of the housing 7. The ball nut 8 realizes the efficient conversion of the lead screw 5 rotation to the housing 7 movement through the circulation of steel balls. The control device 9 includes a solenoid valve to control the on and off of compressed air, a paint valve to regulate the paint flow, a pressure sensor to monitor the system pressure, a PLC controller to process control signals, a pressure regulating filter to stabilize the air source quality, an electrical interface to connect to an external control system, a nozzle 10 to realize paint atomization spray through an internal flow channel, and an air pipe connector 12 to connect to a compressed air pipeline.

[0024] A paint connector 13 is fixedly installed on the left side of the air pipe connector 12, and a storage tank 18 is fixedly installed on the right side of the base 1. A feed pump 14 is fixedly installed at the upper end of the storage tank 18. The feed pump 14 is connected to the paint connector 13 through a feed pipe 17. A compressor 15 is fixedly installed on the left side of the base 1. The compressor 15 is connected to the air pipe connector 12 through an air pipe 16. The paint connector 13 is connected to the paint delivery pipeline. The storage tank 18 stores the paint to be sprayed and maintains constant pressure. The feed pump 14 provides power for paint delivery and regulates the flow rate. The compressor 15 generates high-pressure air as a power source. The air pipe 16 delivers compressed air to the actuator. The feed pipe 17 is connected to the paint supply system.

[0025] Working Principle: When this automotive front and rear bumper injection molding part spraying processing device is working, the motor 4 first drives the lead screw 5 to rotate, and the rotational motion is converted into the horizontal reciprocating motion of the housing 7 along the guide rod 6 through the ball nut 8. The control device 9 includes components such as a solenoid valve (controlling the on and off of compressed air), a paint valve (controlling the paint flow), a pressure sensor (monitoring the system pressure), a PLC controller (processing signal commands), a pressure regulating filter (stabilizing the air source quality), and an electrical interface (connecting to the control system). When the compressed air generated by the compressor 15 is delivered to the air pipe joint 12 through the air pipe 16, the pressure regulating filter in the control device 9 performs pressure stabilization and purification treatment on the air source. At the same time, the paint in the storage tank 18 is pumped to the paint joint 13 through the delivery pump 14 and the delivery pipe 17. The PLC controller synchronously starts the solenoid valve and the paint valve according to the preset program. The compressed air enters the nozzle assembly through the sleeve 11 to form an atomized airflow, and the paint forms a stable flow under the system pressure monitored by the pressure sensor. A constant flow rate is maintained. After mixing inside the nozzle 10, the two components form a uniform atomized spray flow. When the housing 7 moves to the end of the workpiece, the limit signal received by the electrical interface triggers the PLC controller to close the solenoid valve to start and stop the spraying. During the spraying process, the pressure sensor monitors the system pressure in real time and feeds the data back to the PLC controller. When the pressure fluctuation exceeds the threshold, the pressure regulating filter output pressure is automatically adjusted. At the same time, the paint valve dynamically adjusts its opening according to the flow requirements. The atomizing air cap ensures the uniformity of the coating by adjusting the mixing ratio of air and paint. After completing a single spraying cycle, the motor 4 reverses and drives the housing 7 to reset. At this time, the feed pump 14 maintains a low-pressure circulation state to prevent paint sedimentation. When the next working cycle begins, the compressor 15 and the feed pump 14 start again in coordination to enter a new round of spraying. Throughout the process, the guide rod 6 always provides linear motion constraint for the housing 7, the sleeve 11 ensures the smooth movement of the guide rod, and the control device 9 realizes closed-loop control of the spraying parameters through integrated signal processing.

[0026] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A kind of automobile front and back surrounding injection-molded parts spray processing device, including base (1), it is characterized in that, The base (1) consists of two parallel units. A column (2) is fixedly installed at the upper end of the base (1). A support plate (3) is fixedly installed on the inner side of the column (2). A reinforcing member (4) is fixedly installed between the column (2) and the base (1). A lead screw (5) is rotatably installed between the two support plates (3). A guide rod (6) is fixedly installed on the lower side of the lead screw (5). A housing (7) is installed through the lead screw (5) and the guide rod (6).

2. The apparatus for spraying the injection-molded part of a vehicle front and rear bumper according to claim 1, wherein A control device (9) is fixedly installed inside the housing (7), and a nozzle (10) is fixedly installed at the rear end of the housing (7).

3. The apparatus for spraying the injection-molded part of a vehicle according to claim 1, wherein The left and right ends of the housing (7) are fixedly provided with sleeves (11), and the lower end of the housing (7) is fixedly provided with a tracheal connector (12).

4. The apparatus for spraying the injection-molded part of a vehicle according to claim 3, wherein A paint connector (13) is fixedly installed on the left side of the air pipe connector (12), and a storage tank (18) is fixedly installed on the right side of the base (1).

5. The apparatus for spraying the injection-molded part of claim 4, wherein the spraying device is a spray gun. A feed pump (14) is fixedly installed at the upper end of the storage tank (18), and the feed pump (14) is connected to the paint connector (13) through a feed pipe (17).

6. The apparatus for painting the injection-molded front and rear bumper fascia of an automobile as recited in claim 1, wherein A compressor (15) is fixedly installed on the left side of the base (1), and the compressor (15) is connected to the air pipe connector (12) through an air pipe (16).

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