Double-screw conveying full-spraying machine

Abstract

The utility model discloses a double-screw conveying full-spraying machine which comprises a machine frame, a can inlet conveying mechanism, a positioning rotating disc, a plurality of spraying mechanisms, a can outlet conveying mechanism, a positioning partition plate, a plurality of can protecting positioning mechanisms and a plurality of can body rotating positioning mechanisms capable of driving metal can bodies to rotate. A can feeding station, a plurality of spraying positioning holes and a can discharging station are sequentially arranged on the positioning partition plate in the circumferential direction of the positioning partition plate; the positioning turntable is rotatably mounted on the positioning partition plate, and the protective tank positioning mechanisms are uniformly mounted on the outer edge of the positioning turntable in the circumferential direction of the positioning turntable; the tank body rotating and positioning mechanisms are installed on the rack and located in the corresponding spraying and positioning holes respectively, the spraying mechanisms are installed on the positioning partition plate and located on the outer sides of the corresponding spraying and positioning holes respectively, and spraying heads of the spraying mechanisms face the corresponding tank body rotating and positioning mechanisms respectively; the can inlet conveying mechanism is installed on the machine frame and corresponds to the can inlet station, and the can outlet conveying mechanism is installed on the machine frame and corresponds to the can outlet station.

Description

Technical Field

[0001] The utility model relates to the technical field of tank spraying equipment, in particular to a twin-screw conveying full-spraying machine. Background Art

[0002] Most of the existing cans used for packaging are made of plastic or metal materials. Metal cans made of metal materials usually need to be coated on the inside. The existing methods of spraying the inside of metal cans mainly use manual spraying and mechanical spraying. Manual spraying is convenient to operate and has a wide adaptability, but the spraying quality is low and the spraying is not uniform enough. The existing mechanical spraying device rotates the can body so that the mechanical spraying device sprays the inside of the rotating can body. However, this mechanical spraying device is not easy to ensure the stability of the metal can during the rotation and movement. The can body is prone to shaking and shifting, resulting in poor spraying accuracy and uneven coating thickness. There is a lack of effective positioning and protection during the spraying process. The can body is easily bumped and damaged, and the connection between each process is not smooth, which affects production efficiency and cannot achieve high-quality spraying operations on the inside of the metal can in an efficient and stable manner. Utility Model Content

[0003] The problem to be solved by the utility model is to provide a twin-screw conveying full-spraying machine, which can position and fix the metal can during the spraying process, improve the uniformity and consistency of the coating, and improve the spraying quality.

[0004] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0005] A twin-screw conveying full spraying machine, comprising a frame, a can feeding conveying mechanism, a positioning turntable, a plurality of spraying mechanisms and a can discharging conveying mechanism; each spraying mechanism is provided with a spray head; the machine is characterized in that it also comprises a positioning baffle, a plurality of can protection positioning mechanisms and a plurality of can body rotation positioning mechanisms capable of driving the metal can body to rotate, the positioning baffle is mounted on the frame, and a can feeding station, a plurality of spray positioning holes and a can discharging station are sequentially arranged on the positioning baffle along its circumference, the spraying mechanism, the can body rotation positioning mechanism and the spray positioning holes are the same in number and correspond one to one; the positioning turntable is rotatably mounted on the positioning baffle, and each can protection positioning mechanism is rotatably mounted on the positioning baffle. The structures are evenly installed on the outer edge of the positioning turntable along the circumference of the positioning turntable, some of the tank protection positioning mechanisms correspond to each spray positioning hole, and the tank protection positioning mechanisms are located directly above the corresponding spray positioning holes; each tank body rotation positioning mechanism is installed on the frame and is located in the corresponding spray positioning hole, each spray mechanism is installed on the positioning partition and is located on the outside of the corresponding spray positioning hole, and the nozzle of each spray mechanism is facing the corresponding tank body rotation positioning mechanism; the tank inlet conveying mechanism is installed on the frame and corresponds to the tank inlet station, and the tank outlet conveying mechanism is installed on the frame and corresponds to the tank outlet station.

[0006] During operation, each metal can is placed upright on the can feed conveyor, which then feeds each can sequentially to the can feed station on the positioning partition. The positioning turntable then intermittently rotates, aligning each can retaining position with the can feed station. When a retaining position reaches the can feed station, the can feed conveyor feeds the can into the retaining position, where it is positioned and secured, ensuring stability during subsequent processing. The positioning turntable then continues to rotate, bringing the retaining position and the can to the can body rotation positioner in the first spray positioning hole. The can body rotation positioner then secures the can and rotates the can body, aligning the spray nozzle of the spray mechanism with the can body opening. The spray mechanism then begins to spray the paint evenly onto the inner wall of the rotating can. Due to the rotation of the can body, the paint is evenly applied to the entire inner wall, preventing over-spray or missed areas. During the spraying process, the tank protection positioning mechanism and the tank body rotation positioning mechanism work together to keep the tank body stable to avoid deviation or tipping due to rotation.

[0007] Each time the positioning turntable rotates through a station, a new can-holder positioning mechanism arrives at the can-in station to receive the next can. Simultaneously, the coated can rotates with the turntable to the next can-holder rotation positioning mechanism, where the next spraying mechanism performs a second spraying on the rotating can's inner wall. After all spraying steps are completed, the positioning turntable carries the can-holder positioning mechanism to the can-out station. At this point, the can-holder rotation positioning mechanism releases its grip on the can, and the can-holder positioning mechanism releases the can. The can-out conveyor mechanism removes the coated can from the can-holder positioning mechanism and conveys it to the next process. This entire process repeats itself, achieving continuous, automatic spraying of cans.

[0008] The above-mentioned multiple spraying mechanisms can work in parallel to spray or perform related treatments on the tank bodies at different workstations respectively, thereby realizing continuous operation.

[0009] Typically, the intermittent rotation of the positioning turntable is achieved by a turntable drive mechanism. The turntable drive mechanism comprises a rotating shaft, a drive motor, a driving pulley, a driven pulley, and an endless synchronous belt. The rotating shaft is rotatably mounted on the frame and arranged in an up-and-down direction. The positioning turntable is mounted on the upper end of the rotating shaft. The drive motor is mounted on the frame, the driving pulley is mounted on the power output shaft of the drive motor, and the driven pulley is mounted on the rotating shaft. The driving and driven pulleys jointly tension the endless synchronous belt. During operation, the drive motor rotates the driving pulley, which, through the endless synchronous belt, drives the driven pulley, the rotating shaft, the positioning turntable, and the various tank positioning mechanisms mounted thereon to rotate about the rotating shaft.

[0010] In a preferred embodiment, the spray positioning holes are arranged at equal intervals along the circumference of the positioning partition. A plurality of spray positioning holes arranged at equal intervals can enable the tank body to pass through each station on the positioning turntable at a constant time interval, thereby achieving a uniform spraying rhythm.

[0011] In a preferred embodiment, the tank retaining and positioning mechanism includes an arcuate tank retaining block. The outer edge of the positioning turntable is provided with a plurality of arcuate notches evenly spaced along its circumference. The arcuate tank retaining blocks are mounted within the arcuate notches. The outer side of the arcuate tank retaining block is provided with an arcuate concave surface that matches the outer surface of the metal can. The arcuate concave surface of the arcuate tank retaining block matches the outer shape of the can, enabling contact and support over a larger area. Compared to point or line contact methods, this provides a more stable fixation of the can, preventing shaking during high-speed rotation.

[0012] In a preferred embodiment, the can body rotation and positioning mechanism includes a rotating disk and a spraying rotary drive mechanism capable of driving the rotating disk. The spraying rotary drive mechanism is mounted on the frame and positioned below the positioning baffle. The rotating disk is mounted on the power output of the spraying rotary drive mechanism and positioned within and capable of rotating within the corresponding spraying positioning holes. Driven by the spraying rotary drive mechanism, the rotating disk is capable of smooth, high-speed rotation. The rotating disk is magnetic and can secure the bottom of the metal can by magnetic attraction, eliminating the need for complex fixtures or fasteners, simplifying loading and unloading operations and improving work efficiency.

[0013] Typically, the spraying rotation drive mechanism can adopt the specific structure of the turntable drive mechanism. Each spraying rotation drive mechanism can be driven by an independent drive motor or by sharing the same drive motor.

[0014] In a preferred embodiment, the twin-screw conveying full-spray machine further includes a vacuum powder removal mechanism, comprising a powder suction hood, an exhaust fan, an exhaust pipe, a powder discharge pipe, and a powder collection box. The powder suction hood is mounted on the machine frame, with its powder collection port facing downward and positioned above each of the spraying mechanisms. The powder outlet of the powder suction hood is connected to the powder collection box via a powder discharge pipe. The exhaust fan is also mounted on the machine frame, with its air inlet connected to the powder discharge pipe via an exhaust pipe. During the spraying process, some paint particles from the spray nozzles of the spraying mechanisms are dispersed into the air, forming suspended dust. The powder suction hood is mounted above each spraying mechanism, with its powder collection port facing downward, directly facing the spraying area, to capture rising paint particles. The exhaust fan is activated to draw air from the powder discharge pipe via the exhaust pipe, creating a negative pressure environment within the entire powder suction system. This negative pressure acts on the powder collection port of the powder suction hood, generating an upward suction force. Due to negative pressure, air from the spraying area, along with suspended paint particles, is drawn into the powder collection port of the powder hood. The air then flows through the internal passages of the hood to the powder outlet, where it is then transported through the powder discharge pipe to the powder collection box. This vacuum powder discharge mechanism effectively collects excess dust generated during the spraying process, improving workshop air quality and providing a healthier working environment for operators.

[0015] In a further preferred embodiment, the powder suction hood includes a powder suction tube and a plurality of powder suction caps, and the number of the powder suction caps is the same as that of the spray positioning holes and corresponds one to one; the powder suction tube is installed on the frame, the upper end of the powder suction tube is connected to one end of the powder discharge tube, the lower end of the powder suction tube is a closed end, and the tube wall of the powder suction tube is provided with a plurality of powder inlets corresponding to the powder suction caps, the powder collecting ports of the powder suction caps are all arranged downward and respectively above the corresponding spraying mechanisms, and the powder outlets of the powder suction caps are connected to the inner cavity of the powder suction tube through the corresponding powder inlets. The design of the one-to-one correspondence between the above-mentioned powder suction caps and the spray positioning holes enables each spraying station to have a dedicated dust collection device, thereby achieving more accurate and efficient dust collection. The paint particles collected by each powder suction cap enter the corresponding powder inlet provided on the wall of the powder suction tube through their respective powder outlets, and are collected into the inner cavity of the central powder suction tube. The powder suction tube serves as the main road to collect the paint particles collected by all stations.

[0016] In a preferred embodiment, the spraying mechanism includes a column and a spray gun. The column is mounted on the positioning partition, the fixed end of the spray gun is hingedly mounted on the upper end of the column, and the spray head is mounted at the spray gun's discharge port. The column provides a stable support base for the spray gun, and the spray gun is hingedly mounted on the upper end of the column, allowing for flexible adjustment of the spray angle to accommodate the internal spraying requirements of tanks of varying sizes.

[0017] In a further preferred embodiment, the positioning partition is provided with an arc-shaped guardrail, which is located outside each of the spray positioning holes, and the uprights are mounted on the arc-shaped guardrail. The arc-shaped guardrail surrounds the outside of the spray positioning holes, forming a physical barrier that further limits the position of each metal can and prevents the metal cans from being thrown out during the spraying process.

[0018] In a preferred embodiment, the can feeding conveying mechanism includes two can feeding conveyor belts, two screws, a screw drive mechanism capable of driving the two screws to rotate in opposite directions, and a first conveying drive mechanism capable of driving the can feeding conveyor belts to rotate; the two can feeding conveyor belts are arranged side by side on the frame, the two screws are arranged side by side and are both rotatably mounted on the frame, the rotating axes of the two screws are parallel to the conveying directions of the two can feeding conveyor belts, and the discharge ends of the two can feeding conveyor belts are respectively located below between the two screws, and the discharge ends of the two can feeding conveyor belts correspond to the can feeding stations on the positioning partition; the surfaces of the two screws are provided with continuous spiral blades capable of matching the can bodies. Each metal can is transported to the discharge ends of the two can feeding conveyor belts by the two can feeding conveyor belts, and then each metal can is pushed one by one to the can feeding station of the positioning partition by the continuous spiral blades of the two screws, guiding the metal can bodies to advance precisely along the direction of the screw axis, thereby preventing metal can accumulation and deviation at the discharge ends of the can feeding conveyor belts.

[0019] Typically, the first conveying drive mechanism includes a driving roller, a driven roller, and a conveying motor. The driving roller and the driven roller jointly tension the conveyor belt. The driving roller is in driving connection with the output shaft of the conveying motor. The conveying motor drives the driving roller to rotate, thereby conveying the conveyor belt.

[0020] Typically, the above-mentioned screw drive device includes a screw drive motor, a driving gear, two driven gears, multiple transmission gears and multiple ring chains. The driving gear is installed on the output shaft of the screw drive motor, and the two driven gears are respectively installed on one end of the two screws. The driving gear and the two driven gears are respectively connected through multiple transmission gears and multiple ring chains to achieve reverse rotation under the action of the screw drive motor.

[0021] Typically, the can delivery conveyor mechanism includes a can delivery conveyor belt and a second conveyor drive mechanism capable of driving the conveyor belt. The second conveyor drive mechanism includes a driving roller, a driven roller, and a conveyor motor. The driving roller and the driven roller work together to tension the can delivery conveyor belt. The driving roller is in driving connection with the output shaft of the conveyor motor. The conveyor motor drives the driving roller to rotate, thereby achieving delivery of the can delivery conveyor belt.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] (1) The present invention uses a can rotation and positioning mechanism to drive the metal can to rotate at high speed, while a spraying mechanism sprays the inner wall of the rotating can, ensuring that the coating evenly covers the entire inner surface. Compared with the unevenness of manual spraying and the uneven thickness caused by the shaking of existing mechanical spraying, the present invention can significantly improve the uniformity and consistency of the coating, thereby improving the spraying quality.

[0024] (2) The utility model is provided with a tank protection positioning mechanism and a tank body rotation positioning mechanism to position and fix the metal tank during the spraying process. Even if the tank body rotates at high speed, it can remain stable and not shake, thereby avoiding spraying deviation caused by displacement and improving the spraying accuracy of the inner wall of the metal tank.

[0025] (3) The utility model adopts a positioning partition and a multi-station turntable structure. Through the intermittent rotation of the positioning turntable, each station works in parallel and the connection is smooth. The spraying mechanism can spray multiple tanks at the same time, greatly improving the spraying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of a specific embodiment of the utility model;

[0027] Figure 2 yes Figure 1 Schematic diagram of the structure of the central positioning turntable, tank protection positioning mechanism, and tank body rotation positioning mechanism;

[0028] Figure 3 yes Figure 1 Schematic diagram of the structure of the middle powder suction hood;

[0029] Figure 4 yes Figure 1 Front view of . DETAILED DESCRIPTION

[0030] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] like Figure 1-4As shown, the twin-screw conveying full spraying machine in this embodiment includes a frame 1, a tank feeding conveying mechanism 2, a positioning turntable 3, multiple spraying mechanisms 4, a tank discharging conveying mechanism 5, a positioning partition 6, multiple tank protection positioning mechanisms 7 and multiple tank body rotation positioning mechanisms 8 that can drive the metal tank 9 to rotate; each spraying mechanism 4 is provided with a nozzle 41; the positioning partition 6 is installed on the frame 1, and the positioning partition 6 is provided with a tank feeding station 61, multiple spraying positioning holes 62 and a tank discharging station 63 in sequence along its circumference. The number of the spraying mechanism 4, the tank body rotation positioning mechanism 8 and the spraying positioning holes 62 is the same and corresponds one to one; the positioning turntable 3 can be rotatably installed on the positioning partition 6, and each tank protection positioning mechanism 7 It is evenly installed on the outer edge of the positioning turntable 3 along the circumference of the positioning turntable 3, and some of the tank protection positioning mechanisms 7 correspond to each spray positioning hole 62, and the tank protection positioning mechanisms 7 are directly above the corresponding spray positioning holes 62; each tank body rotation positioning mechanism 8 is installed on the frame 1 and is respectively located in the corresponding spray positioning hole 62, each spray mechanism 4 is installed on the positioning partition 6 and is respectively located on the outside of the corresponding spray positioning hole 62, and the nozzle 41 of each spray mechanism 4 is respectively facing the corresponding tank body rotation positioning mechanism 8; the tank inlet conveying mechanism 2 is installed on the frame 1 and corresponds to the tank inlet station 61, and the tank outlet conveying mechanism 5 is installed on the frame 1 and corresponds to the tank outlet station 63.

[0032] During operation, each metal can 9 is first placed in an upright position on the can feed conveyor 2. The can feed conveyor 2 then sequentially feeds each can 9 to the can feed station 61 on the positioning partition 6. The positioning turntable 3 then intermittently rotates, aligning each can retaining position 7 with the can feed station 61. When a can retaining position 7 reaches the can feed station 61, the can feed conveyor 2 feeds the can 9 into the retaining position 7, where it is positioned and secured, ensuring stability during subsequent processing. The positioning turntable 3 then continues to rotate, bringing the retaining position 7 and the can 9 to the can body rotation position 8 in the first spray positioning hole 62. The can body rotation position 8 then secures the can 9 and rotates it, aligning the spray head 41 of the spray mechanism 4 with the can body opening. The spray mechanism 4 then begins operating, spraying the coating evenly onto the inner wall of the rotating can 9. Because the tank body is rotating, the coating can evenly cover the entire inner wall, avoiding local over-thickness or leaking. During the spraying process, the tank protection positioning mechanism 7 and the tank body rotation positioning mechanism 8 keep the tank body stable together, avoiding deviation or tipping due to rotation.

[0033] Each time the positioning turntable 3 rotates through a station, a new can-holder positioning mechanism 7 arrives at the can-in station 61 to receive the next metal can 9. Simultaneously, the coated can body rotates with the turntable to the next can-body rotation positioning mechanism 8, where the next spraying mechanism 4 sprays the inner wall of the rotating metal can 9 a second time. After all spraying steps are completed, the positioning turntable 3 moves the can-holder positioning mechanism 7 to the can-out station 63. At this point, the can-body rotation positioning mechanism 8 releases its grip on the metal can 9, and the can-holder positioning mechanism 7 also releases the metal can 9. The can-out conveying mechanism 5 removes the coated can body from the can-holder positioning mechanism 7 and conveys it to the next process. This entire process repeats itself, achieving continuous and automatic spraying of the metal cans 9.

[0034] The above-mentioned multiple spraying mechanisms 4 can work in parallel to spray or perform related treatments on the tank bodies at different workstations respectively, thereby realizing continuous operation.

[0035] Typically, the intermittent rotation of the positioning turntable 3 is achieved by a turntable drive mechanism. The turntable drive mechanism comprises a rotating shaft, a drive motor, a driving pulley, a driven pulley, and an endless synchronous belt. The rotating shaft is rotatably mounted on the frame 1 and arranged in an up-and-down direction. The positioning turntable 3 is mounted on the upper end of the rotating shaft. The drive motor is mounted on the frame 1. The driving pulley is mounted on the power output shaft of the drive motor, and the driven pulley is mounted on the rotating shaft. The driving and driven pulleys jointly tension the endless synchronous belt. During operation, the drive motor rotates the driving pulley, which, through the endless synchronous belt, drives the driven pulley, the rotating shaft, the positioning turntable 3, and the various tank positioning mechanisms 7 mounted thereon, to rotate about the rotating shaft.

[0036] The spray positioning holes 62 are evenly spaced along the circumference of the positioning partition 6. The multiple evenly spaced spray positioning holes 62 enable the tank body to pass through each station on the positioning turntable at a constant time interval, thereby achieving a uniform spraying rhythm.

[0037] The tank retaining and positioning mechanism 7 includes an arcuate tank retaining block 71. A plurality of arcuate notches 31 are uniformly disposed along the circumference of the outer edge of the positioning turntable 3. The arcuate tank retaining block 71 is mounted within the arcuate notches 31. The outer side of the arcuate tank retaining block 71 is provided with an arcuate concave surface 72 that matches the outer surface of the metal tank 9. The arcuate concave surface 72 of the arcuate tank retaining block 71 matches the outer surface of the tank, enabling contact and support over a larger area. Compared to point contact or line contact methods, this provides a more stable fixation of the tank, preventing shaking during high-speed rotation.

[0038] The tank body rotation positioning mechanism 8 includes a rotating disk 81 and a spraying rotation drive mechanism 82 capable of driving the rotating disk 81 to rotate. The spraying rotation drive mechanism 82 is mounted on the frame 1 and is located below the positioning partition 6. The rotating disk 81 is mounted on the power output end of the spraying rotation drive mechanism 82. The rotating disk 81 is located in the corresponding spraying positioning hole 62 and is capable of rotating in the corresponding spraying positioning hole 62. The rotating disk 81 can rotate smoothly and at high speed under the drive of the spraying rotation drive mechanism 82. The rotating disk 81 is magnetic and can adsorb and fix the bottom of the metal tank 9 by magnetic force, without the need for complex clamps or fasteners, thereby simplifying loading and unloading operations and improving work efficiency.

[0039] Typically, the spraying rotation drive mechanism 82 may adopt the specific structure of the above-mentioned turntable drive mechanism. Each spraying rotation drive mechanism 82 may be driven by an independent drive motor or may share the same drive motor.

[0040] This twin-screw conveying full-spray machine also includes a vacuum powder discharge mechanism 10, which includes a powder suction hood 101, an exhaust fan 102, an exhaust pipe 103, a powder discharge pipe 104, and a powder collection box 105. The powder suction hood 101 is mounted on the frame 1, with the powder collection port of the powder suction hood 101 facing downward and located above each of the spraying mechanisms 4. The powder outlet of the powder suction hood 101 is connected to the powder collection box 105 via the powder discharge pipe 104. The exhaust fan 102 is mounted on the frame 1, with the air inlet of the exhaust fan 102 connected to the powder discharge pipe 104 via the exhaust pipe 103. During the spraying process, some paint particles from the nozzle of the spraying mechanism 4 will float into the air, forming suspended dust. The powder suction hood 101 is mounted above each spraying mechanism 4, with the powder collection port facing downward, directly facing the spraying area, to capture the rising paint particles. The exhaust fan 102 is activated, and air is extracted from the powder discharge pipe 104 via the exhaust pipe 103, creating a negative pressure environment within the entire powder suction system. This negative pressure acts on the powder collection port of the powder suction hood 101, generating an upward suction force. Due to the negative pressure, air in the spraying area, along with suspended paint particles, is drawn into the powder collection port of the powder suction hood 101, passes through the internal channel of the powder suction hood 101, reaches the powder outlet, and is then transported through the powder discharge pipe 104 to the powder collection box 105. The vacuum powder discharge mechanism 10 can effectively collect excess dust generated during the spraying process, improve the air quality in the workshop, and provide a healthier working environment for operators.

[0041] The powder suction cover 101 includes a powder suction pipe 1011 and a plurality of powder suction caps 1012. The number of the powder suction caps 1012 is the same as that of the spray positioning holes 62 and they correspond one to one. The powder suction pipe 1011 is installed on the frame 1. The upper end of the powder suction pipe 1011 is connected to one end of the powder discharge pipe 104. The lower end of the powder suction pipe 1011 is a closed end. The tube wall of the powder suction pipe 1011 is provided with a plurality of powder inlets 1013 corresponding to the powder suction caps 1012. The powder collecting ports of the powder suction caps 1012 are all downwardly arranged and respectively located above the corresponding spraying mechanism 4. The powder outlets of the powder suction caps 1012 are connected to the inner cavity of the powder suction pipe 1011 through the corresponding powder inlets 1013. The design of the one-to-one correspondence between the above-mentioned powder suction caps 1012 and the spray positioning holes 62 enables each spraying station to have a dedicated dust collection device, thereby achieving more accurate and efficient dust collection. The paint particles collected by each powder suction cap 1012 pass through their respective powder outlets and enter the corresponding powder inlet 1013 provided on the wall of the powder suction pipe 1011, and are collected into the inner cavity of the central powder suction pipe 1011. The powder suction pipe 1011 serves as the main channel to collect the paint particles collected by all workstations.

[0042] The spraying mechanism 4 includes a column 42 and a spray gun 43. The column 42 is mounted on the positioning partition 6. The fixed end of the spray gun 43 is hingedly mounted on the upper end of the column 42. The spray head 41 is mounted at the discharge port of the spray gun 43. The column 42 provides a stable support base for the spray gun 43. The spray gun 43 is hingedly mounted on the upper end of the column 42, which allows for flexible adjustment of the spray angle to meet the internal spraying requirements of tanks of different specifications.

[0043] The positioning partition 6 is provided with an arc-shaped guardrail 64, which is located outside each of the spray positioning holes 62, and the columns 42 are mounted on the arc-shaped guardrail 64. The arc-shaped guardrail 64 surrounds the outside of the spray positioning holes 62, forming a physical barrier, further limiting the can bodies of the metal cans 9 and preventing the metal cans 9 from being thrown out during the spraying process.

[0044] The can feeding conveying mechanism 2 includes two can feeding conveyor belts 21, two screws 22 and a screw driving mechanism 23 capable of driving the two screws 22 to rotate in opposite directions, and a first conveying driving mechanism (not shown in the figure) capable of driving the can feeding conveyor belts 21 to rotate; the two can feeding conveyor belts 21 are arranged side by side on the frame 1, and the two screws 22 are arranged side by side and can be rotatably mounted on the frame 1, the rotating shafts of the two screws 22 are parallel to the conveying directions of the two can feeding conveyor belts 21, and the discharge ends of the two can feeding conveyor belts 21 are respectively located below between the two screws 22, and the discharge ends of the two can feeding conveyor belts 21 correspond to the can feeding stations 61 on the positioning partition 6; the surfaces of the two screws 22 are provided with continuous spiral blades 221 that can match the can body of the metal can 9. Each metal can 9 is transported to the discharge end of the two can feed conveyor belts 21 through the two can feed conveyor belts 21, and then each metal can 9 is pushed one by one to the can feed station 61 of the positioning partition 6 through the continuous spiral blades 221 of the two screws 22, guiding the metal can 9 to move forward precisely along the axis direction of the screw 22, avoiding the accumulation and deviation of metal cans 9 at the discharge end of the can feed conveyor belt 21.

[0045] Typically, the first conveying drive mechanism includes a driving roller, a driven roller, and a conveying motor. The driving roller and the driven roller jointly tension the conveyor belt. The driving roller is in driving connection with the output shaft of the conveying motor. The conveying motor drives the driving roller to rotate, thereby conveying the conveyor belt.

[0046] Typically, the screw drive mechanism 23 includes a screw drive motor, a driving gear, two driven gears, multiple transmission gears and multiple ring chains. The driving gear is mounted on the output shaft of the screw drive motor, and the two driven gears are respectively mounted on one end of the two screws 22. The driving gear and the two driven gears are respectively connected through multiple transmission gears and multiple ring chains to achieve reverse rotation of the two screws 22 under the action of the screw drive motor.

[0047] Typically, the can delivery conveyor mechanism 5 comprises a can delivery conveyor belt and a second conveying drive mechanism capable of driving the conveyor belt. The second conveying drive mechanism comprises a driving roller, a driven roller, and a conveying motor. The driving roller and the driven roller work together to tension the can delivery conveyor belt. The driving roller is in driving connection with the output shaft of the conveying motor. The conveying motor drives the driving roller to rotate, thereby achieving delivery of the can delivery conveyor belt.

[0048] In addition, it should be noted that the names of the various parts of the specific embodiments described in this specification may be different. Any equivalent or simple changes made based on the structure, features, and principles described in the concept of this utility model patent are included in the scope of protection of this utility model patent. Those skilled in the art of the technical field to which this utility model belongs may make various modifications or supplements to the specific embodiments described, or replace them with similar methods. As long as they do not deviate from the structure of this utility model or exceed the scope defined by this claim, they shall fall within the scope of protection of this utility model.

Claims

1. A twin-screw conveying full-spraying machine, comprising a frame, a can inlet conveying mechanism, a positioning turntable, multiple spraying mechanisms, and a can outlet conveying mechanism; each spraying mechanism is provided with a spray head; and characterized in that: The can body rotation positioning mechanism is installed on the frame, and each can protection positioning mechanism is evenly installed on the outer edge of the positioning turntable along the circumference of the positioning turntable, and some can protection positioning mechanisms correspond to each spray positioning hole respectively, and the can protection positioning mechanism is located directly above the corresponding spray positioning hole; each can body rotation positioning mechanism is installed on the frame and is respectively located in the corresponding spray positioning hole, and each spray mechanism is installed on the positioning partition and is respectively located on the outside of the corresponding spray positioning hole, and the nozzle of each spray mechanism is respectively facing the corresponding tank body rotation positioning mechanism; the can feeding conveying mechanism is installed on the frame and corresponds to the can feeding station, and the can discharging conveying mechanism is installed on the frame and corresponds to the can discharging station.

2. The twin-screw conveying full-spray machine according to claim 1, characterized in that: The spray positioning holes are arranged at equal intervals along the circumference of the positioning partition.

3. The twin-screw conveying full-spray machine according to claim 1, characterized in that: The tank protection positioning mechanism includes an arc-shaped tank protection block. A plurality of arc-shaped notches are evenly arranged along the circumference of the outer edge of the positioning turntable. The arc-shaped tank protection block is installed in the arc-shaped notches. The outer side surface of the arc-shaped tank protection block is provided with an arc-shaped concave surface matching the metal tank body.

4. The twin-screw conveying full-spray machine according to claim 1, characterized in that: The tank body rotation positioning mechanism includes a rotating disk and a spraying rotation drive mechanism capable of driving the rotating disk to rotate. The spraying rotation drive mechanism is installed on the frame and is located below the positioning partition. The rotating disk is installed on the power output end of the spraying rotation drive mechanism. The rotating disk is located in the corresponding spraying positioning hole and can rotate in the corresponding spraying positioning hole.

5. The twin-screw conveying full-spray machine according to claim 1, characterized in that: It also includes a vacuum powder discharge mechanism, which includes a powder suction hood, an exhaust fan, an exhaust pipe, a powder discharge pipe and a powder collection box. The powder suction hood is installed on the frame, and the powder collection port of the powder suction hood is arranged downward and above each of the spraying mechanisms. The powder outlet of the powder suction hood is connected to the powder collection box through the powder discharge pipe; the exhaust fan is installed on the frame, and the air inlet of the exhaust fan is connected to the powder discharge pipe through the exhaust pipe.

6. The twin-screw conveying full-spray machine according to claim 5, characterized in that: The powder suction hood includes a powder suction tube and multiple powder suction caps, and the number of the powder suction caps is the same as that of the spray positioning holes and corresponds one to one; the powder suction tube is installed on the frame, the upper end of the powder suction tube is connected to one end of the powder discharge tube, and the lower end of the powder suction tube is a closed end. The tube wall of the powder suction tube is provided with multiple powder inlets corresponding to the powder suction caps, the powder collecting ports of the powder suction caps are all arranged downward and are respectively located above the corresponding spraying mechanisms, and the powder outlets of the powder suction caps are connected to the inner cavity of the powder suction tube through the corresponding powder inlets.

7. The twin-screw conveying full-spray machine according to claim 1, characterized in that: The spraying mechanism includes a column and a spray gun, the column is installed on the positioning partition, the fixed end of the spray gun is hingedly installed on the upper end of the column, and the spray head is installed at the discharge port of the spray gun.

8. The twin-screw conveying full-spray machine according to claim 7, characterized in that: The positioning partition is provided with an arc-shaped guardrail, the arc-shaped guardrail is located at the outside of each of the spray positioning holes, and the column is installed on the arc-shaped guardrail.

9. The twin-screw conveying full-spray machine according to claim 1, characterized in that: The can feeding conveying mechanism includes two can feeding conveyor belts, two screws and a screw driving mechanism capable of driving the two screws to rotate in opposite directions, and a first conveying driving mechanism capable of driving the can feeding conveyor belts to rotate; the two can feeding conveyor belts are arranged side by side on the frame, and the two screws are arranged side by side and can be rotatably installed on the frame. The rotating shafts of the two screws are parallel to the conveying directions of the two can feeding conveyor belts, and the discharge ends of the two can feeding conveyor belts are respectively located below between the two screws, and the discharge ends of the two can feeding conveyor belts correspond to the can feeding stations on the positioning partition; the surfaces of the two screws are provided with continuous spiral blades that can match the metal can body.

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