A pneumatic spraying machine for polyurethane coating on the inner surface of a tire

Abstract

The present invention discloses a gas-mixed spraying machine for polyurethane coating on the inner surface of a tire, which includes a support assembly, a transmission assembly, a spraying assembly, and a cleaning tank body. The support assembly is fixed on the ground, and the transmission assembly, the spraying assembly, and the cleaning tank body are all fixed to the support assembly. The cleaning tank body is fixed on the servo motor of the transmission assembly. The spraying assembly includes a mixing part and a feeding control part. The transmission assembly controls the horizontal and vertical movements of the spraying assembly; the feeding control part controls two components to enter the mixing part to be mixed to form polyurethane paint, which is sprayed onto the inner side of the tire by a nozzle; the cleaning tank body provides cleaning agents for cleaning and maintaining the equipment. The gas-mixed spraying machine for polyurethane coating on the inner surface of a tire provided by the present invention is easy to manufacture and process, convenient to disassemble, assemble and repair, and has uniform spraying and high spraying efficiency, and can be used for spraying polyurethane coatings on the inner surfaces of a batch of tires.

Description

Technical Field

[0001] The present invention relates to the field of spraying machines, and more specifically to a gas-mixing spraying machine for polyurethane coating on the inner surface of tires. Background Art

[0002] At present, improving the spraying principle of spraying machines is the main direction of research and improvement of spraying machines. Generally, ordinary air spraying method, electrostatic spraying method, high-pressure airless spraying method, etc. are adopted. The ordinary air spraying method has problems such as low spraying efficiency, easy waste, air pollution, and obvious harm to the safety and health of workers; the electrostatic spraying method has disadvantages such as being extremely prone to inducing fires and difficult to obtain a uniform coating on surfaces with complex shapes or deep concave and convex contours; the high-pressure airless spraying method has disadvantages such as low paint utilization rate, fast paint ejection speed, large impact, and certain danger. In order to meet the requirements of increasing production efficiency, a gas-mixing spraying machine for polyurethane coating on the inner surface of tires is designed and invented. This gas-mixing spraying machine for polyurethane coating on the inner surface of tires has the advantages of reasonable structure and can realize the position movement of the spraying component under the action of the transmission component. Summary of the Invention

[0003] The purpose of the present invention is to provide a gas-mixing spraying machine for polyurethane coating on the inner surface of tires with a reasonable structure and capable of realizing the position movement of the spraying component under the action of the transmission component.

[0004] The solution adopted by the present invention is as follows:

[0005] A gas-mixing spraying machine for polyurethane coating on the inner surface of tires, comprising: a support component, a transmission component, a spraying component, and a cleaning tank body; the support component is fixed on the ground, and the transmission component, the spraying component, and the cleaning tank body are all fixed to the support component; the support component is composed of a combined guide rail bottom plate, a frame, a transmission mechanism top plate, a transmission mechanism side plate, a transmission mechanism bottom plate, a combined guide rail support plate, a guide rail support plate, a support arm, a motor mounting plate, a mixing head support plate, a support shaft, and a bushing; the transmission component is composed of a servo motor, a horizontal stepping motor, a vertical stepping motor, a stepping motor seat, a coupling, a lead screw slide table, a horizontal ball screw, a vertical ball screw, a driving synchronous pulley, a driven synchronous pulley, a synchronous belt, a horizontal linear guide rail, a vertical arc guide rail, a guide rail slider, a diamond bearing seat, a T-shaped lead screw nut, and a steering slide seat; the spraying component includes a mixing part and a feeding control part, the mixing part includes an upper end cover of the mixing chamber, an upper end of the mixing chamber, a mixing chamber, a main shaft, a lower end of the mixing chamber, a mixing head, a spherical valve I, a spray head, and a blind hole, and the feeding control part includes a cylinder, a cylinder mounting seat, a hinge long hole plate, a feeding chamber, a feeding port, a valve rod driving arm, a stop shaft, a rotating shaft, a deep groove ball bearing, and a spherical valve II.

[0006] Furthermore, the frame is fixed to the ground by the combined guide rail bottom plate; the combined guide rail support plate is connected to the frame; the transmission mechanism top plate is fixed to the top end of the transmission mechanism side plate, and the transmission mechanism bottom plate is connected to the transmission mechanism side plate to support the transmission assembly; the transmission mechanism side plate is connected to the guide rail support plate; the mixing head support plate is fixed to the support arm; the support shaft is fixed to the mixing head support plate and fixes the spraying assembly; the bushing is horizontally penetrated by two of the support shafts, and the main shaft vertically passes through the mixing head support plate and is fastened by screws.

[0007] Furthermore, the lead screw slide table is connected to the combined guide rail support plate. There are two horizontal ball lead screws and two vertical ball lead screws. The horizontal stepping motor is connected to the horizontal ball lead screw, and the movement is transmitted through the guide rail slider and the horizontal linear guide rail to realize the horizontal movement of the spraying assembly; the vertical stepping motor is connected to the vertical ball lead screw, and the movement is transmitted through the steering slide seat and the vertical arc guide rail to realize the up-and-down arc movement of the spraying assembly so as to fit the inner shape of the tire; the vertical stepping motor is fixed to the stepping motor seat, and the stepping motor seat is fixed to the transmission mechanism top plate; the rotating shaft of the vertical stepping motor is connected to the vertical ball lead screw through a coupling, and the vertical ball lead screw is connected to the diamond bearing seat through the hole of the transmission mechanism top plate; the vertical ball lead screw is connected by a T-shaped lead screw nut through the hole of the support arm, and the T-shaped lead screw nut is fixed to the mixing head support plate. The lower end of the vertical ball lead screw is fixed to the transmission mechanism bottom plate through the diamond bearing seat; the servo motor is fixed to the motor mounting plate, the motor mounting plate is fixed to the support arm, the driving synchronous pulley is fixed to the servo motor shaft, and the synchronous belt connects the driving synchronous pulley and the driven synchronous pulley.

[0008] Furthermore, the upper end of the mixing chamber is a cylinder, in which the main shaft and the seal are placed and is connected to the feeding chamber; the main shaft is a stepped shaft, the upper end of the main shaft is connected to the driven synchronous pulley by a key, and the lower end of the main shaft is connected to the mixing head, so as to realize the rotation of the mixing head controlled by the servo motor; the upper end of the mixing chamber is thick and the lower end is thin, and the blind hole below the outer wall provides an external force support point for the loading and unloading of the mixing chamber. During the downward movement of the polyurethane coating generated after the mixing reaction, the volume is gradually compressed and the pressure gradually increases, and finally it is atomized and sprayed out through the spray holes of the nozzle; the mixing head is thick at the upper end and thin at the lower end, and protrusions are evenly distributed, so that the mixing head can stir the coating more fully and make the coating mix evenly; a spherical valve 1 is installed in part of the nozzle to control the discharge amount.

[0009] Further, the feeding chamber is provided with a first feeding hole, a second feeding hole, a return material hole, and a threaded hole; the air cylinder is installed on the air cylinder mounting seat; the air cylinder mounting seat is fixed at the lower end of the mixing chamber; the telescopic movement of the air cylinder rod causes the hinge long hole plate to move up and down. The stop shaft is connected to the rotating shaft through the valve rod driving arm. The stop shaft can rotate on the valve rod driving arm, and the valve rod driving arm is in interference fit with the rotating shaft; the valve rod driving arm is matched with the lower end of the hinge long hole plate through two deep groove ball bearings, so that the valve rod driving arm rotates around the rotating shaft; the rotating shaft is matched with the spherical valve two valve core. When the opening of the spherical valve two is opened, the coating component enters the mixing chamber.

[0010] Further, the cleaning box body is fixed on the servo motor, and the cleaning agent enters through the feeding chamber to perform regular cleaning and maintenance on the equipment.

[0011] Further, each set of components is used as a module, making the polyurethane coating spraying machine for the inner surface of the tire easy to process and manufacture, with an overall beautiful and compact structure, and easy to install and disassemble. After the components are worn, they are easy to replace.

[0012] The beneficial effects that can be achieved by a pneumatic spraying machine for polyurethane coating on the inner surface of a tire according to the present invention are as follows:

[0013] (1) During the spraying process of the polyurethane coating on the inner surface of the tire, the spraying assembly moves in an up and down arc, conforming to the shape of the inner side of the tire, making the spraying more uniform.

[0014] (2) In the mixing part, the upper part of the mixing head is thick and the lower part is thin, with evenly distributed protrusions, enabling the mixing head to stir the coating more fully and making the mixing more uniform.

[0015] (3) A spherical valve is installed in the nozzle part, which can control the discharge amount according to requirements.

[0016] (4) The spraying machine has the characteristics of beautiful appearance, convenient manufacturing, processing, disassembly and assembly, convenient maintenance, high transmission efficiency, and reliable operation, and can be used for batch spraying of polyurethane coatings on the inner surface of tires. Description of the Drawings

[0017] Figure 1 : Three-dimensional structure diagram of a pneumatic spraying machine for polyurethane coating on the inner surface of a tire according to the present invention;

[0018] Figure 2 : Spraying part component diagram of a pneumatic spraying machine for polyurethane coating on the inner surface of a tire according to the present invention;

[0019] Figure 3 : Spraying part sectional view of a pneumatic spraying machine for polyurethane coating on the inner surface of a tire according to the present invention;

[0020] Figure 4 :Schematic diagram of the feeding chamber of the gas-mixing spraying machine with a polyurethane coating on the inner surface of the tire according to the present invention;

[0021] Figure 5 :Schematic diagram of the vertical arc slide rail of the gas-mixing spraying machine with a polyurethane coating on the inner surface of the tire according to the present invention.

[0022] In the figure: 1 - combined guide rail bottom plate, 2 - frame, 3 - servo motor, 4 - horizontal stepping motor, 5 - vertical stepping motor, 6 - stepping motor base, 7 - coupling, 8 - lead screw slide table, 9 - horizontal ball screw, 10 - vertical ball screw, 11 - driven synchronous pulley, 12 - driving synchronous pulley, 13 - synchronous belt, 14 - top plate of the transmission mechanism, 15 - side plate of the transmission mechanism, 16 - bottom plate of the transmission mechanism, 17 - mixing head support plate, 18 - horizontal linear guide rail, 19 - vertical arc guide rail, 20 - guide rail slider, 21 - guide rail support plate, 22 - motor mounting plate, 23 - diamond bearing seat, 24 - T-shaped lead screw nut, 25 - support arm, 26 - upper end of the mixing chamber, 27 - mixing chamber, 28 - main shaft, 29 - steering slide seat, 30 - end cover of the upper end of the mixing chamber, 31 - mixing head, 32 - support shaft, 33 - lower end of the mixing chamber, 34 - spray head, 35 - blind hole, 36 - ball valve 1, 37 - cylinder, 38 - cylinder mounting seat, 39 - hinge long hole plate, 40 - feeding chamber, 41 - feeding port, 42 - valve rod driving arm, 43 - rotating shaft, 44 - deep groove ball bearing, 45 - ball valve 2, 46 - feeding hole 1, 47 - threaded hole, 48 - blocking shaft, 49 - return hole, 50 - cleaning box body, 51 - combined guide rail support plate, 52 - bushing, 53 - support assembly, 54 - transmission assembly, 55 - spraying assembly, 56 - mixing part, 57 - feeding control part, 58 - feeding hole 2. Detailed implementation manners

[0023] The following further describes the specific implementation of the present invention with reference to the accompanying drawings.

[0024] As Figure 1 、 2As shown in Figures 3, 4, and 5, a pneumatic spraying machine for polyurethane coating on the inner surface of a tire according to the present invention includes: a support assembly 53, a transmission assembly 54, a spraying assembly 55, and a cleaning tank body 50; the support assembly 53 is fixed on the ground, and the transmission assembly 54, the spraying assembly 55, and the cleaning tank body 50 are all fixed to the support assembly 53; the support assembly 53 is composed of a combined guide rail bottom plate 1, a frame 2, a transmission mechanism top plate 14, a transmission mechanism side plate 15, a transmission mechanism bottom plate 16, a combined guide rail support plate 51, a guide rail support plate 21, a support arm 25, a motor mounting plate 22, a mixing head support plate 17, a support shaft 32, and a bushing 52; the transmission assembly is composed of a servo motor 3, a horizontal stepping motor 4, a vertical stepping motor 5, a stepping motor seat 6, a coupling 7, a lead screw slide 8, a horizontal ball screw 9, a vertical ball screw 10, a driving synchronous pulley 12, a driven synchronous pulley 11, a synchronous belt 13, a horizontal linear guide rail 18, a vertical arc guide rail 19, a guide rail slider 20, a diamond bearing seat 23, a T-shaped lead screw nut 24, and a steering slide 29; the spraying assembly 55 includes a mixing part 56 and a feeding control part 57, the mixing part 56 includes an upper end cover 30 of the mixing chamber, an upper end 26 of the mixing chamber, a mixing chamber 27, a main shaft 28, a lower end 33 of the mixing chamber, a mixing head 31, a spherical valve 1 36, a nozzle 34, and a blind hole 35, and the feeding control part 57 includes a cylinder 37, a cylinder mounting seat 38, a hinge long hole plate 39, a feeding chamber 40, a feeding port 41, a valve rod driving arm 42, a stop shaft 48, a rotating shaft 43, a deep groove ball bearing 44, and a spherical valve 2 45.

[0025] Further, the frame 2 is fixed on the ground through the combined guide rail bottom plate 1; the combined guide rail support plate 26 is connected to the frame 2; the transmission mechanism top plate 14 is fixed at the top of the transmission mechanism side plate 15, and the transmission mechanism bottom plate 16 is connected to the transmission mechanism side plate 15 to support the transmission assembly 54; the transmission mechanism side plate 15 is connected to the guide rail support plate 21; the mixing head support plate 37 is fixed on the support arm 25; the support shaft 32 is fixed on the mixing head support plate 17 and fixes the spraying assembly 55; the bushing 52 is horizontally penetrated by two support shafts 32, and the main shaft 28 vertically passes through the mixing head support plate 17 and is fastened by screws.

[0026] Further, the lead screw slide 8 is connected to the combined guide rail support plate 51. There are two horizontal ball screws 9 and two vertical ball screws 19. The horizontal stepper motor 4 is connected to the horizontal ball screw 9, and the movement is transmitted through the guide rail slider 20 and the horizontal linear guide rail 18 to realize the horizontal movement of the spraying assembly 55; the vertical stepper motor 5 is connected to the vertical ball screw 10, and the movement is transmitted through the steering slide 29 and the vertical arc guide rail 19 to realize the up and down arc movement of the spraying assembly 55, so as to fit the inner shape of the tire; the vertical stepper motor 5 is fixed on the stepper motor seat 6, and the stepper motor seat 6 is fixed on the transmission mechanism top plate 14; the rotating shaft of the vertical stepper motor 5 is connected to the vertical ball screw 10 through the coupling 7, and the vertical ball screw 10 is connected to the diamond bearing seat 23 through the hole of the transmission mechanism top plate 14; the vertical ball screw 10 is connected by the T-shaped screw nut 24 through the hole of the support arm 25, and the T-shaped screw nut 24 is fixed on the mixing head support plate 17, and the lower end 10 of the vertical ball screw is fixed on the transmission mechanism bottom plate 16 through the diamond bearing seat 23; the servo motor 3 is fixed on the motor mounting plate 22, the motor mounting plate 22 is fixed on the support arm 25, the synchronous pulley 11 is fixed on the shaft of the servo motor 3, and the synchronous belt 13 connects the driving synchronous pulley 12 and the driven synchronous pulley 11.

[0027] Further, the upper end 26 of the mixing chamber is a cylinder, inside which the main shaft 28 and the seal are placed, and it is connected to the feeding chamber 40; the main shaft 28 is a stepped shaft, the upper end of the main shaft 28 is connected to the driven synchronous pulley 12 by a key, and the lower end of the main shaft 28 is connected to the mixing head 31, so as to realize the rotation of the mixing head 31 controlled by the servo motor 3; the upper end of the mixing chamber 27 is thick and the lower end is thin, and the blind hole 35 below the outer wall provides an external force support point for the loading and unloading of the mixing chamber 27. During the downward movement of the paint generated after the mixing reaction, the volume is gradually compressed and the pressure gradually increases, and finally it is atomized and ejected through the spray holes of the spray head 34; the mixing head 31 is thick at the upper end and thin at the lower end, and protrusions are evenly distributed, so that the mixing head 31 stirs the paint more fully and makes the paint mix evenly; a ball valve 36 is installed on a part of the spray head 34 to control the discharge amount.

[0028] Further, the feeding chamber 40 provides a first feeding hole 46, a second feeding hole 58, a return material hole 49, and a threaded hole 47; the cylinder 37 is installed on the cylinder mounting seat 38; the cylinder mounting seat 38 is fixed to the lower end 33 of the mixing chamber; the telescopic movement of the guide rod of the cylinder 37 causes the hinge long hole plate 39 to move up and down. The stop shaft 48 is connected to the rotating shaft 43 through the valve rod driving arm 42. The stop shaft 48 can rotate on the valve rod driving arm 42, and the valve rod driving arm 42 and the rotating shaft 43 are in interference fit; the valve rod driving arm 42 and the lower end of the hinge long hole plate 39 are matched by two deep groove ball bearings 44, so that the valve rod driving arm 42 rotates around the rotating shaft 43; the rotating shaft 43 is matched with the spherical valve two 45. When the opening of the spherical valve two 45 is opened, the coating component enters the mixing chamber 27.

[0029] Further, the cleaning box body 50 is fixed to the servo motor 3, and the cleaning agent enters through the feeding chamber 40 to perform regular cleaning and maintenance on the equipment.

[0030] As Figure 1 、 2 shown in Figures 3, 4, and 5, the working method steps of the polyurethane coating gas mixing spraying machine for the inner surface of the tire of the present invention are as follows:

[0031] The transmission component 54 controls the position movement of the gas-mixed spraying machine for the polyurethane coating on the inner surface of the tire. Among them, the horizontal stepping motor 4 controls the front-back horizontal movement of the spraying component 55, and the vertical stepping motor 5 controls the up-down movement of the spraying component 55. After the position adjustment in two directions, the nozzle 34 of the spraying machine is centered with the inner surface of the tire. Then, the two components respectively enter the feeding chamber 40 through the two feeding ports 41 symmetrically distributed front and back via the first feeding hole 46 and the second feeding hole 58, and the feeding control part 57 controls them to enter the mixing chamber 27, where polyurethane is formed by mixing. The guide rod of the cylinder 37 drives the hinge long-hole plate 39 to move up and down, and the stop shaft 48 connected to the valve rod driving arm 42 moves horizontally relative to the hinge long-hole plate 39. The valve rod driving arm 42 rotates around the stop shaft 48, and the valve rod driving arm 42 is in interference fit with the rotating shaft 43 to drive the rotating shaft 43 to rotate, thereby controlling the rotation of the spherical valve two 45, and finally realizing the control of the inlet and outlet of the polyurethane coating components. The movement of the servo motor 3 is transmitted to the main shaft 28 through the driving synchronous pulley 12, the driven synchronous pulley 11 and the synchronous belt 13, and then drives the mixing head 31 to rotate, so that the polyurethane coating components are mixed and reacted under the rotation of the mixing head 31. The upper end of the mixing chamber 27 is thick and the lower end is thin, and the pressure of the coating gradually increases during the downward movement. A spherical valve one 36 is installed on a part of the nozzle 34 to adjust the required discharge amount, and finally it is atomized and sprayed out through the nozzle 34. In addition, the vertical stepping motor 5 drives the spraying component 54 to move in an arc in the vertical direction through the vertical arc-shaped guide rail 19, and the movement track fits the shape of the inner side of the tire, so that the spraying of polyurethane is more uniform.

[0032] The protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined by the claims.

Claims

1. A pneumatic spraying machine for polyurethane coating on the inner surface of a tire, characterized in that: it includes a support assembly, a transmission assembly, a spraying assembly, and a cleaning tank body; the support assembly is fixed on the ground, and the transmission assembly and the spraying assembly are both fixed to the support assembly; the support assembly is composed of a combined guide rail bottom plate, a frame, a transmission mechanism top plate, transmission mechanism side plates, a transmission mechanism bottom plate, a combined guide rail support plate, a guide rail support plate, a support arm, a motor mounting plate, a mixing head support plate, a support shaft, and a bushing; the transmission assembly is composed of a servo motor, a horizontal stepping motor, a vertical stepping motor, a stepping motor seat, a coupling, a lead screw slider, a horizontal ball screw, a vertical ball screw, a driving synchronous pulley, a driven synchronous pulley, a synchronous belt, a horizontal linear guide rail, a vertical arc guide rail, a guide rail slider, a diamond bearing seat, a T-shaped lead screw nut, and a steering slider; the spraying assembly includes a mixing part and a feeding control part, the mixing part includes an upper end cover of the mixing chamber, an upper end of the mixing chamber, a mixing chamber, a main shaft, a lower end of the mixing chamber, a mixing head, a spherical valve 1, a nozzle, and a blind hole, and the feeding control part includes a cylinder, a cylinder mounting seat, a hinge long hole plate, a feeding chamber, a feeding port, a valve rod driving arm, a stop shaft, a rotating shaft, a deep groove ball bearing, and a spherical valve 2; the frame is fixed on the ground through the combined guide rail bottom plate; the combined guide rail support plate is connected to the frame; the transmission mechanism top plate is fixed at the top of the transmission mechanism side plates, and the transmission mechanism bottom plate is connected to the transmission mechanism side plates; the transmission mechanism side plates are connected to the guide rail support plate; the mixing head support plate is fixed to the support arm; the support shaft is fixed on the mixing head support plate and fixes the spraying assembly; the bushing is horizontally penetrated by two of the support shafts, and the main shaft vertically passes through the mixing head support plate and is fastened by screws; The screw slide is connected to the combined guide rail support plate, the horizontal ball screws are provided with two, the vertical ball screws are provided with two, the horizontal stepper motor is connected to the horizontal ball screw, and the motion is transmitted through the guide rail slider and the horizontal linear guide rail to realize the horizontal motion of the spraying component; the vertical stepper motor is connected to the vertical ball screw, and the motion is transmitted through the steering slide and the vertical arc guide rail to realize the up and down arc motion of the spraying component; the vertical stepper motor is fixed on the stepper motor seat, and the stepper motor seat is fixed on the top plate of the transmission mechanism; the rotating shaft of the vertical stepper motor The vertical ball screw is connected to the vertical ball screw through a coupling, and the vertical ball screw is connected to the diamond bearing seat through the hole of the top plate of the transmission mechanism; the vertical ball screw is connected with the T-type screw nut through the hole of the support arm, and the T-type screw nut is fixed on the mixing head support plate, and the lower end of the vertical ball screw is fixed to the bottom plate of the transmission mechanism through the diamond bearing seat; the servo motor is fixed on the motor mounting plate, and the motor mounting plate is fixed on the support arm, and the active synchronous pulley is fixed on the servo motor shaft, and the synchronous belt connects the active synchronous pulley with the driven synchronous pulley; The upper end of the mixing chamber is a cylinder, in which the main shaft and the seal are placed, and the mixing chamber is connected to the feeding chamber; the main shaft is a stepped shaft, the upper end of the main shaft is connected to the driven synchronous pulley through a key, and the lower end of the main shaft is connected to the mixing head; the upper end of the mixing chamber is thick and the lower end is thin, and the blind hole below the outer wall provides an external force support point for the mixing chamber during loading and unloading; the mixing head is thick at the upper end and thin at the lower end, and has evenly distributed protrusions; a ball valve 1 is installed on the nozzle part to control the discharge amount; The feed chamber provides feed hole 1, feed hole 2, return hole, and threaded hole; the cylinder is mounted on the cylinder mounting seat; the cylinder mounting seat is fixed to the lower end of the mixing chamber; the cylinder guide rod is telescopic to make the hinge long hole plate move up and down, the stop shaft and the rotating shaft are connected through the valve stem driving arm, the stop shaft can rotate on the valve stem driving arm, and the valve stem driving arm and the rotating shaft have an interference fit; the valve stem driving arm and the lower end of the hinge long hole plate are matched through the two deep groove ball bearings, so that the valve stem driving arm rotates around the rotating shaft; the rotating shaft is matched with the second valve core of the spherical valve; The cleaning box body is fixed on the servo motor.

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