Adjustable linear hot melt coating and drawing machine

Abstract

This invention discloses an adjustable hot melt coating extrusion marking machine. It includes: a machine body; a discharge hopper fixed to the machine body with a discharge port at its bottom; two baffle plates symmetrically arranged on both sides of the discharge port, movably connected to the discharge port; and a baffle plate driving mechanism, which is connected to both baffle plates for transmission. The driving mechanism drives the two baffle plates to move synchronously away from or towards each other along the central axis of the discharge port, thereby opening and closing the discharge port and adjusting the discharge width. The advantages of this invention are: adjustable discharge width; uniform force on both sides and consistent discharge flow, avoiding problems such as skewed discharge and uneven line width; high line marking regularity; fast overall adjustment response and reliable structure, further improving the accuracy of line marking and the durability of the equipment.

Description

Technical Field

[0001] This invention relates to the technical field of hot melt coating extrusion marking machines, and in particular to a hot melt coating extrusion marking machine with adjustable line shape. Background Technology

[0002] Hot melt line marking machines are widely used in traffic marking construction operations on roads, factories, parking lots, etc. They mainly form traffic markings on the ground by extruding molten paint through a discharge hopper. The shape and width of the marking lines directly affect the quality of the marking construction and the effect of use. They are an indispensable key equipment in the construction of road traffic safety facilities.

[0003] The existing hot melt coating extrusion marking machines mostly have a fixed discharge port width, making it difficult to quickly adjust the marking width according to different construction scenarios. Some adjustable discharge structures have problems such as asymmetrical adjustment of the baffle plate and inconsistent opening on both sides, which can easily lead to skewed paint discharge, uneven marking width, and irregular forming. Moreover, the adjustment operation is cumbersome and has poor adaptability, failing to meet the diverse and precise hot melt marking construction needs.

[0004] In summary, there is a need for a hot melt coating extrusion marking machine that can adjust the marking width and improve the regularity of marking formation. Summary of the Invention

[0005] The present invention aims to overcome the shortcomings of the prior art by providing an adjustable hot melt coating extrusion marking machine that can adjust the marking width and improve the regularity of marking formation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An adjustable-line hot melt coating extrusion marking machine, comprising: Organism; A discharge hopper is fixed to the machine body, and a discharge port is provided at the bottom of the discharge hopper; Two baffle plates are symmetrically arranged on both sides of the discharge port, and the baffle plates are movably connected to the discharge port; A baffle plate driving mechanism is connected to two baffle plates respectively. The baffle plate driving mechanism is used to drive the two baffle plates to move away from or towards each other synchronously along the central axis of the discharge port, so as to realize the opening and closing of the discharge port and the adjustment of the discharge width.

[0007] During operation, the baffle plate drive mechanism drives two symmetrically arranged baffle plates to move synchronously away from or towards each other along the central axis of the discharge port, thereby controlling the opening and closing of the discharge port and precisely adjusting the discharge width. The symmetrical baffle plate structure ensures uniform force on both sides and consistent discharge flow, avoiding problems such as skewed discharge and uneven line width. Combined with the synchronous adjustment method, it can quickly adapt to the hot melt marking construction needs of different specifications and line types. The overall structure is simple and compact, the adjustment and operation are convenient, and the marking formation has high regularity, effectively improving the equipment's versatility and marking construction quality.

[0008] Preferably, the bottom of the discharge hopper is provided with a baffle plate groove, and the discharge port is opened at the center of the bottom surface of the baffle plate groove. Two baffle plates are slidably disposed in the baffle plate groove and symmetrically arranged on both sides of the discharge port. The baffle plate driving mechanism includes a cylinder fixed to the surface of the discharge hopper. The cylinder is provided with a piston rod, which is arranged along the symmetrical center line of the two baffle plates. A first connecting block is fixed to the end of each baffle plate away from the piston rod. A second connecting block matching the first connecting block is fixed to the end of the piston rod. The first connecting block and the second connecting block are connected by a transmission arm. One end of the transmission arm is mounted on the first connecting block and hinged thereto, and the other end of the transmission arm is mounted on the second connecting block and hinged thereto. The two baffle plates are connected to the two end walls of the baffle plate groove by a first spring. During operation, the cylinder drives the piston rod to extend and retract, which in turn drives two baffle plates to move synchronously relative to each other within the baffle plate groove via the articulated transmission arm. This achieves adjustment of the discharge port width. The springs can reset and buffer the baffle plates, preventing jamming. The cylinder and connecting rod transmission structure, combined with the groove guide, ensures synchronous and precise adjustment. The symmetrical transmission method ensures consistent opening on both sides, and the spring assistance improves the stability of the baffle plate operation, effectively avoiding jamming and deviation. The discharge is uniform and stable, and the marking lines are neat. The overall adjustment response is fast, the structure is reliable, and the marking accuracy and equipment durability are further improved.

[0009] Preferably, a solenoid valve is fixed on the cylinder, and the solenoid valve is electrically connected to the cylinder. The surface of the cylinder is covered with a high-temperature resistant sleeve. The design of the solenoid valve allows for precise control of the cylinder's extension and retraction to achieve rapid and accurate adjustment of the baffle plate. At the same time, the high-temperature resistant sleeve covering the outside of the cylinder effectively insulates against the high temperatures during hot-melt coating operations, preventing the cylinder from being damaged by heat and improving the operational stability and service life of the equipment under high-temperature conditions.

[0010] Preferably, the machine body is also fixed with a hot melt kettle, the hot melt kettle is internally divided into a coating inner cavity and a heat-conducting outer cavity, the heat-conducting outer cavity covers the outside of the coating inner cavity, the discharge hopper is internally divided into a storage inner cavity and a heat-insulating outer cavity, the heat-insulating outer cavity covers the outside of the storage inner cavity, the inside of the heat-conducting outer cavity and the inside of the heat-insulating outer cavity are both filled with heat-conducting oil, the inside of the heat-conducting outer cavity is fixed with a heating coil, the heating coil surrounds the outer wall of the coating inner cavity and is immersed in the heat-conducting oil, the heat-conducting outer cavity and the heat-insulating outer cavity are provided with oil delivery pipes and oil return pipes, the heat-conducting outer cavity and the heat-insulating outer cavity are connected by the oil delivery pipes and the oil return pipes, the oil delivery pipes are provided with oil pumps, and the oil return pipes are provided with oil pumps. The heating coil heats the heat transfer oil in the heat-conducting outer cavity of the hot melt kettle. Driven by the oil supply pump and the return pump, the heat transfer oil circulates between the heat-conducting outer cavity of the hot melt kettle and the heat-insulating outer cavity of the discharge hopper through the oil supply pipeline and the return pipeline. This continuously heats and insulates the inner cavity of the coating and the inner cavity of the storage material, keeping the hot melt coating in a suitable molten state and preventing the coating from cooling and clumping, which would affect the discharge. At the same time, the integrated circulating heat-conducting structure has high heat utilization rate and uniform and stable heat preservation effect, ensuring smooth and continuous discharge and improving the efficiency of line marking construction and the quality of line marking formation.

[0011] Preferably, the top of the hot melt kettle has a feeding port that communicates with the inner cavity of the coating, and a cover is hinged to the feeding port. By setting a feeding port on the top of the hot melt kettle that communicates with the inner cavity of the coating and hinged to the cover, it is convenient to add hot melt coating into the inner cavity of the coating. At the same time, the hinged cover can be opened and closed easily, effectively blocking the feeding port, reducing heat loss during operation and preventing dust and debris from entering the inner cavity and contaminating the coating, thus ensuring the quality of coating melting.

[0012] Preferably, the discharge port and the storage cavity are connected, the top of the storage cavity is provided with a pressure regulating port, an air compressor is fixed on the machine body, the air compressor and the pressure regulating port are connected through a pressure regulating pipe, the coating cavity and the storage cavity are connected through a conveying pipe, the conveying pipe is provided with a conveying pump, and a rotating baffle is hinged to the cavity wall of the storage cavity, the rotating baffle is adapted to the port of the conveying pipe and can cover the port of the conveying pipe. The feed pump transports the hot melt coating material from the coating cavity of the hot melt kettle to the storage cavity of the discharge hopper through the feed pipeline. The air compressor provides pressure to the storage cavity through the pressure regulating pipeline to ensure stable extrusion of the coating material. The rotating baffle can automatically open and close according to the coating material delivery pressure. It can both guide the feeding during the feeding process and block the feed pipeline port when the feeding stops, preventing the coating material in the storage cavity from flowing back into the hot melt kettle. It can also prevent the hot melt coating material from flowing back and causing pipeline blockage. Together with the overall pressure conveying structure, it can achieve continuous and stable supply of coating material, improve the continuity of discharge and the reliability of equipment operation.

[0013] Preferably, the inner cavity of the coating is equipped with a drive shaft, and the side wall of the drive shaft is provided with a plurality of stirring rods. A stirring rod transmission mechanism corresponding to and cooperating with the stirring rods is mounted on the drive shaft, and the stirring rods are rotatably connected to the drive shaft through the stirring rod transmission mechanism. The drive shaft rotates within the coating cavity, driving each stirring rod to rotate and revolve synchronously through the transmission mechanism, thus comprehensively stirring the internal hot-melt coating. This effectively avoids uneven heating and sedimentation of the coating, ensuring complete melting and uniform composition, guaranteeing stable coating fluidity, and consequently ensuring smooth and uniform subsequent discharge, thereby improving the quality of the marking and line forming.

[0014] Preferably, a hydraulic motor is fixed to the top of the hot melt kettle, and the top end of the drive shaft passes through the top wall of the coating cavity and is connected to the output end of the hydraulic motor. A fixed platform is fixed to the bottom wall of the coating cavity, and a fixed base rod is vertically fixed to the fixed platform. A base rod through hole adapted to the fixed base rod is opened at the bottom end of the drive shaft. The fixed base rod extends into the base rod through hole and rotates with the drive shaft. An annular cavity corresponding to the stirring rod is opened in the inner wall of the base rod through hole. The stirring rod transmission mechanism includes a first bevel gear and a second bevel gear. The first bevel gear is fixedly sleeved on the fixed base rod and located in the annular cavity. The stirring rod includes a transmission rod and a stirring rod. A transmission rod through hole is opened in the cavity wall of the annular cavity. The transmission rod passes through the transmission rod through hole and is rotatably connected to the drive shaft. The inner end of the transmission rod extends into the annular cavity and a second bevel gear is fixedly installed thereon. The second bevel gear meshes with the first bevel gear. The stirring rod is installed at the outer end of the transmission rod. During operation, the hydraulic motor at the top of the hot melt kettle controls the rotation of the entire shaft. The shaft drives the transmission rod and the outer stirring rod to revolve around the fixed base rod. Simultaneously, the first bevel gear fixed on the base rod meshes with the second bevel gear at the inner end of the transmission rod, causing the transmission rod and stirring rod to automatically complete their rotation while revolving. This combined revolving and rotating stirring method comprehensively agitates the hot melt coating inside the coating cavity, significantly improving the mixing effect and heat exchange efficiency. This results in more uniform heating and more thorough melting of the coating, effectively improving the melting quality and efficiency of the hot melt coating.

[0015] Preferably, the stirring rod is provided with a helical section, which is located in the middle of the stirring rod body and is arranged in a continuous helical bend along the axis of the stirring rod. The helical section in the middle of the stirring rod can generate multi-directional turbulence during the revolution and rotation of the stirring rod, increasing the contact area with the hot melt coating, enhancing the shearing and tumbling effect on the coating, further improving the heating uniformity and melting efficiency of the coating, and avoiding the problems of local deposition and uneven melting of the coating.

[0016] Preferably, the outer end face of the transmission rod is provided with a stirring rod groove adapted to the stirring rod. One end of the stirring rod extends into the stirring rod groove and slides in cooperation with it. A second spring is provided between the end face of the stirring rod and the bottom of the stirring rod groove. Several bosses are fixed on the cavity wall of the coating cavity. The bosses are evenly arranged circumferentially with the central axis of the drive shaft as the center. The bosses and the stirring rod are in the same plane of rotation. An inclined guide surface is provided on the side of the boss facing the central axis of the drive shaft. The vertical distance between the inclined guide surface and the central axis of the drive shaft gradually decreases along the extension direction of the inclined guide surface. When the stirring rod revolves with the transmission rod, its free end slides along the inclined guide surface. It can be pushed by the inclined guide surface to slide towards the bottom of the stirring rod groove and compress the second spring. When the free end of the stirring rod slides away from the inclined guide surface, the stirring rod extends away from the bottom of the stirring rod groove under the action of the second spring and returns to its original position. As the stirring rod revolves with the drive shaft, its end slides along the inclined guide surface of the boss. Under the pressure of the inclined guide surface, it slides into the groove of the stirring rod and compresses the second spring. After sliding away from the inclined guide surface, it extends outward and resets under the elastic force of the second spring. This allows the stirring rod to achieve reciprocating extension and retraction motion based on revolution and rotation, which disturbs the hot melt coating in multiple dimensions, further increasing the disturbance range and stirring intensity of the coating. This effectively avoids local deposition and uneven heating of the coating, and improves the melting uniformity and construction quality.

[0017] The beneficial effects of this invention are: it can adjust the discharge width; it can ensure uniform force on both sides and consistent discharge flow, avoiding problems such as discharge skewing and uneven line width; it has high regularity in line marking; it has fast overall adjustment response and reliable structure, further improving the accuracy of line marking construction and the durability of equipment; it improves the operational stability and service life of equipment under high temperature conditions; it improves the efficiency of line marking construction and the quality of line marking; it achieves continuous and stable supply of paint, improving the continuity of discharge and the reliability of equipment operation; it improves the quality of line marking formation; and it improves the melting quality and melting efficiency of hot melt paint. Attached Figure Description

[0018] Figure 1 This is the front view of the present invention; Figure 2 This is a bottom view of the discharge hopper; Figure 3 This is the front view of the discharge hopper; Figure 4 This is a top view showing the connection between the discharge hopper and the hot melt kettle; Figure 5 This is a right view of the hot melt kettle; Figure 6 yes Figure 5 Sectional view at point AA; Figure 7 yes Figure 6 Enlarged view of point C in the middle; Figure 8 yes Figure 5 Sectional view at point BB.

[0019] In the diagram: 1. Hot melt kettle, 2. Inner cavity of coating, 3. Outer cavity of heat conduction, 4. Drive shaft, 5. Heating coil, 6. Heat transfer oil, 7. Hydraulic motor, 8. Fixed platform, 9. Fixed base rod, 10. Base rod through hole, 11. Annular cavity, 12. First bevel gear, 13. Second bevel gear, 14. Transmission rod, 15. Stirring rod, 16. Transmission rod through hole, 17. Spiral rod segment, 18. Stirring rod groove, 19. Second spring, 20. Boss, 21. Inclined guide surface, 22. Machine body, 23. Discharge hopper, 24. Discharge port, 25. Baffle plate, 26. Baffle plate groove, 27. Cylinder, 28. Piston rod, 29. First connecting block, 30. Second connecting block, 31. Transmission arm, 32. First spring, 33. 34. Solenoid valve; 35. Storage cavity; 36. Insulated outer cavity; 37. Oil delivery pipeline; 38. Oil return pipeline; 39. Oil delivery pump; 40. Oil return pump; 41. Feed port; 42. Baffle; 43. Pressure regulating port; 44. Pressure regulating pipeline; 45. Material delivery pipeline; 46. Material delivery pump; 47. Rotating baffle. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0021] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0022] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of components illustrated in these embodiments do not limit the scope of this application. For ease of illustration, spatial relative terms such as “upper,” “lower,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “below” other elements or features would be fixed “upper” to other elements or features. Thus, the exemplary term “lower” can include both upper and lower orientations. The device may be fixed in other ways (rotated 90 degrees or located in other orientations), and the spatial relative descriptions used herein can be interpreted accordingly. It should also be understood that, for ease of description, the dimensions of the various parts shown in the figures are not drawn to actual scale. Techniques, processes, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, processes, and equipment should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be discussed further in subsequent figures.

[0023] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0024] like Figures 1-8 In the embodiments described above, an adjustable-line hot melt coating extrusion marking machine includes: Body 22; The discharge hopper 23 is fixed on the machine body 22, and the bottom of the discharge hopper 23 is provided with a discharge port 24; Two baffle plates 25 are symmetrically arranged on both sides of the discharge port 24, and the baffle plates 25 are movably connected to the discharge port 24. The baffle plate drive mechanism is connected to two baffle plates 25 respectively. The baffle plate drive mechanism is used to drive the two baffle plates 25 to move away from or towards each other synchronously along the central axis of the discharge port 24, so as to realize the opening and closing of the discharge port 24 and the adjustment of the discharge width.

[0025] The bottom of the discharge hopper 23 is provided with a baffle plate groove 26, and the discharge port 24 is opened at the center of the bottom surface of the baffle plate groove 26. Two baffle plates 25 are slidably disposed in the baffle plate groove 26 and symmetrically arranged on both sides of the discharge port 24. The baffle plate driving mechanism includes a cylinder 27 fixed to the surface of the discharge hopper 23. A piston rod 28 is provided on the cylinder 27. The piston rod 28 is arranged along the symmetrical center line of the two baffle plates 25. The ends of the two baffle plates 25 away from the piston rod 28 are fixed with The first connecting block 29 and the piston rod 28 are fixed with a second connecting block 30 that matches the first connecting block 29. The first connecting block 29 and the second connecting block 30 are connected by a transmission arm 31. One end of the transmission arm 31 is mounted on the first connecting block 29 and hinged thereto, and the other end of the transmission arm 31 is mounted on the second connecting block 30 and hinged thereto. The two baffle plates 25 are connected to the two end walls of the baffle plate groove 26 by a first spring 32.

[0026] A solenoid valve 33 is fixed on the cylinder 27, and the solenoid valve 33 is electrically connected to the cylinder 27. The surface of the cylinder 27 is covered with a high-temperature resistant protective sleeve (made of a high-temperature resistant composite material of silicone rubber and glass fiber). The solenoid valve 33 controls the extension and retraction of the cylinder 27 using conventional pneumatic control technology, which is a mature existing technology in this field. There is no need to define or elaborate on the specific control circuit and control logic, and it is not the focus of this application's improvement.

[0027] The body 22 is also fixed with a hot melt kettle 1. The hot melt kettle 1 is internally divided into a coating inner cavity 2 and a heat-conducting outer cavity 3. The heat-conducting outer cavity 3 covers the outside of the coating inner cavity 2. The discharge hopper 23 is internally divided into a storage inner cavity 34 and an insulation outer cavity 35. The insulation outer cavity 35 covers the outside of the storage inner cavity 34. The interior of the heat-conducting outer cavity 3 and the interior of the insulation outer cavity 35 are both filled with heat-conducting oil 6. A heating coil 5 is fixed inside the heat-conducting outer cavity 3. The heating coil 5 surrounds the outer wall of the coating inner cavity 2 and is immersed in the heat-conducting oil 6. The heat-conducting outer cavity 3 and the insulation outer cavity 35 are provided with an oil delivery pipe 36 and an oil return pipe 37. The heat-conducting outer cavity 3 and the insulation outer cavity 35 are connected by the oil delivery pipe 36 and the oil return pipe 37. An oil delivery pump 38 is provided on the oil delivery pipe 36 and an oil return pump 39 is provided on the oil return pipe 37. A burner is fixedly mounted on the outer wall of the vessel body 1. The heating coil 5 is connected to the burner, and the other end of the coil 5 is connected to the exhaust pipe to exhaust the air outdoors.

[0028] The top of the hot melt kettle 1 is provided with a feeding port 40 that communicates with the inner cavity 2 of the coating. A cover 41 is hinged to the feeding port 40.

[0029] The discharge port 24 is connected to the storage cavity 34. A pressure regulating port 42 is provided at the top of the storage cavity 34. An air compressor is fixed on the machine body 22. The air compressor and the pressure regulating port 42 are connected through a pressure regulating pipe 43. The paint cavity 2 and the storage cavity 34 are connected through a conveying pipe 44. A conveying pump 45 is provided on the conveying pipe 44. A rotating baffle 46 is hinged to the cavity wall of the storage cavity 34. The rotating baffle 46 is adapted to the port of the conveying pipe 44 and can cover the port of the conveying pipe 44. The method of the air compressor delivering gas to the storage cavity 34 through the pressure regulating pipe 43 for pressure regulation is a conventional pressure regulating technology in the art. It is unnecessary to elaborate on the details of the air compressor control logic and pressure regulating pipeline structure, which is not the focus of this application.

[0030] The inner cavity 2 of the coating is equipped with a drive shaft 4. Several stirring rods are distributed on the side wall of the drive shaft 4. The drive shaft 4 is equipped with a transmission mechanism that corresponds to and cooperates with the stirring rods. The stirring rods are rotatably connected to the drive shaft 4 through the transmission mechanism.

[0031] A hydraulic motor 7 is fixed to the top of the hot melt kettle 1. The top end of the drive shaft 4 passes through the top wall of the coating cavity 2 and is connected to the output end of the hydraulic motor 7. A fixed platform 8 is fixed to the bottom wall of the coating cavity 2. A fixed base rod 9 is vertically fixed on the fixed platform 8. A base rod through hole 10 adapted to the fixed base rod 9 is opened at the bottom end of the drive shaft 4. The fixed base rod 9 extends into the base rod through hole 10 and rotates with the drive shaft 4. An annular cavity 11 corresponding to the stirring rod is opened on the inner wall of the base rod through hole 10. The transmission mechanism includes the first A first bevel gear 12 and a second bevel gear 13 are provided. The first bevel gear 12 is fixedly sleeved on the fixed base rod 9 and located in the annular cavity 11. The stirring rod includes a transmission rod 14 and a stirring rod 15. The cavity wall of the annular cavity 11 has a transmission rod through hole 16. The transmission rod 14 passes through the transmission rod through hole 16 and is rotatably connected to the drive shaft 4. The inner end of the transmission rod 14 extends into the annular cavity 11 and is fixedly installed with the second bevel gear 13. The second bevel gear 13 meshes with the first bevel gear 12. The stirring rod 15 is installed on the outer end of the transmission rod 14.

[0032] A spiral rod section 17 is provided on the stirring rod 15. The spiral rod section 17 is located in the middle of the rod body of the stirring rod 15 and is arranged in a continuous spiral bend along the axis of the stirring rod 15.

[0033] A stirring rod groove 18, adapted to the stirring rod 15, is provided on the outer end face of the transmission rod 14. One end of the stirring rod 15 extends into the stirring rod groove 18 and slides in cooperation with it. A second spring 19 is provided between the end face of the stirring rod 15 and the bottom of the stirring rod groove 18. Several bosses 20 are fixed on the cavity wall of the coating inner cavity 2. The bosses 20 are evenly arranged circumferentially with the central axis of the drive shaft 4 as the center. The bosses 20 and the stirring rod 15 are in the same plane of rotation, and the bosses 20 face the central axis of the drive shaft 4. One side is provided with an inclined guide surface 21. The vertical distance between the inclined guide surface 21 and the central axis of the drive shaft 4 gradually decreases along the extension direction of the inclined guide surface 21. When the stirring rod 15 revolves with the transmission rod 14, its free end slides along the inclined guide surface 21. It can be pushed by the inclined guide surface 21 to slide towards the bottom of the stirring rod groove 18 and compress the second spring 19. When the free end of the stirring rod 15 slides away from the inclined guide surface 21, the stirring rod 15 extends away from the bottom of the stirring rod groove 18 under the elastic force of the second spring 19 and returns to its original position.

[0034] Specific work procedures: First, open the hinged cover 41 of the feeding port 40 at the top of the hot melt kettle 1, and put the hot melt coating material into the inner cavity 2 of the coating. After feeding, close the cover 41. Then, the burner operates to introduce high-temperature flue gas into the heating coil 5. The heating coil 5 surrounds the outer wall of the inner cavity 2 of the coating and is completely immersed in the heat transfer oil 6 inside the heat transfer outer cavity 3, heating the heat transfer oil 6. The heat is then evenly transferred to the inner cavity 2 of the coating through the heat transfer oil 6, causing the solid hot melt material inside to gradually melt.

[0035] Hydraulic motor 7 is started synchronously. Hydraulic motor 7 is fixedly installed on the top of hot melt kettle 1. Its output end drives drive shaft 4 to rotate at high speed. The bottom end of drive shaft 4 is rotatably engaged with fixed base rod 9 on fixed platform 8. Fixed base rod 9 remains stationary. Drive shaft 4 drives multiple sets of transmission rods 14 and stirring rod 15 on the side wall to revolve around the central axis of drive shaft 4. The first bevel gear 12 fixedly sleeved on fixed base rod 9 remains stationary. The second bevel gear 13, whose inner end of transmission rod 14 extends into an annular cavity 11, meshes with the first bevel gear 12 to drive transmission rod 14. 4. The self-rotation of the stirring rod 15 causes it to rotate on its own axis while revolving around the central axis. The spiral section 17 in the middle of the stirring rod 15 forms multi-directional turbulence with its rotation and revolution, increasing the contact area with the coating. When the stirring rod 15 passes the protrusion 20 on the wall of the coating cavity 2 during its revolution, its free end slides along the inclined guide surface 21 and is pressed and squeezed by the inclined guide surface 21, causing the stirring rod 15 to slide into the stirring rod groove 18 and compress the second spring 19. When the stirring rod 15 slides away from the inclined guide surface 21, it automatically extends outward and resets under the elastic force of the second spring 19, realizing reciprocating extension and retraction motion. Through three-dimensional composite stirring of revolution, rotation, and reciprocating extension and retraction, the raw materials inside the coating cavity 2 are disturbed in all directions, so that the hot melt raw materials are heated evenly and melted completely, forming a fluid and stable molten hot melt coating.

[0036] After the coating is fully melted, the oil pump 38 and the return oil pump 39 are started. The heat transfer oil 6 heated in the heat transfer outer cavity 3 is transported to the heat insulation outer cavity 35 of the discharge hopper 23 through the oil transfer pipeline 36 under the drive of the oil pump 38. This preheats and insulates the storage inner cavity 34 of the discharge hopper 23. Then, under the action of the return oil pump 39, the heat transfer oil 6 flows back to the heat transfer outer cavity 3 of the hot melt kettle 1 through the return oil pipeline 37, completing the closed circulation of the heat transfer oil 6. This continuously provides constant temperature heating to the coating inner cavity 2 and the storage inner cavity 34, preventing the molten coating from cooling and solidifying and increasing in viscosity, and ensuring that the coating has good fluidity throughout the process.

[0037] Next, the feed pump 45 is started, which provides the conveying power to transport the hot melt coating that has been melted in the coating cavity 2 to the storage cavity 34 of the discharge hopper 23 through the feed pipe 44. The fluid pressure generated by the coating conveying pushes open the rotating baffle 46 hinged on the cavity wall of the storage cavity 34, allowing the coating to enter the storage cavity 34 smoothly. When the conveying stops, the coating conveying pressure disappears, and the rotating baffle 46 naturally hangs down and closes, blocking the port of the feed pipe 44, effectively preventing the hot melt coating in the storage cavity 34 from flowing back to the hot melt kettle 1, avoiding pipe blockage and coating backflow contamination.

[0038] Then, the air compressor on the machine body 22 is started. The air compressor continuously delivers pressurized gas to the pressure regulating port 42 at the top of the storage cavity 34 through the pressure regulating pipe 43, applying uniform and stable air pressure to the molten coating inside the storage cavity 34. The air pressure assists in pushing the coating, allowing the coating to be extruded from the discharge port 24 at a uniform speed, continuously and smoothly, preventing interruptions or uneven discharge. Because the conveying pipe 44 is blocked by a rotating baffle 46, there will be no coating backflow.

[0039] During the construction and marking process, the start, stop, and extension stroke of the cylinder 27 are precisely controlled by the solenoid valve 33 according to the requirements of the road marking width and line type. The cylinder 27 drives the piston rod 28 to perform axial extension and retraction. The second connecting block 30 at the end of the piston rod 28 moves synchronously. Through the transmission arms 31 hinged on both sides, the two first connecting blocks 29 move synchronously relative to each other, driving the two baffle plates 25 to move synchronously closer or further away from each other along the central axis of the outlet 24 in the baffle plate groove 26. The first spring 32 between the two baffle plates 25 and the end walls of the baffle plate groove 26 plays a role in buffering, limiting, and resetting, preventing the baffle plates 25 from getting stuck or shifting. By precisely adjusting the opening and closing distance of the two baffle plates 25, the synchronous and symmetrical adjustment of the discharge width of the outlet 24 is achieved, ensuring that the discharge flow on the left and right sides is consistent, and completing the neat and uniform hot melt road marking construction operation.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adjustable linear hot melt coating extrusion marking machine, characterized in that, include: Body (22); The discharge hopper (23) is fixed on the machine body (22), and the bottom of the discharge hopper (23) is provided with a discharge port (24). Two baffle plates (25) are symmetrically arranged on both sides of the discharge port (24), and the baffle plates (25) are movably connected to the discharge port (24); The baffle plate driving mechanism is connected to two baffle plates (25) respectively. The baffle plate driving mechanism is used to drive the two baffle plates (25) to move away from or closer to each other synchronously along the central axis of the discharge port (24) so ​​as to realize the opening and closing of the discharge port (24) and the adjustment of the discharge width.

2. The adjustable-line hot melt coating and marking machine according to claim 1, characterized in that, The bottom of the discharge hopper (23) is provided with a baffle plate groove (26), and the discharge port (24) is opened at the center of the bottom surface of the baffle plate groove (26). Two baffle plates (25) are slidably disposed in the baffle plate groove (26) and symmetrically arranged on both sides of the discharge port (24). The baffle plate driving mechanism includes a cylinder (27) fixed on the surface of the discharge hopper (23). The cylinder (27) is provided with a piston rod (28). The piston rod (28) is arranged along the symmetrical center line of the two baffle plates (25). The ends of the two baffle plates (25) away from the piston rod (28) are fixed. A first connecting block (29) is fixed, and a second connecting block (30) matching the first connecting block (29) is fixed at the end of the piston rod (28). The first connecting block (29) and the second connecting block (30) are connected by a transmission arm (31). One end of the transmission arm (31) is mounted on the first connecting block (29) and hinged thereto, and the other end of the transmission arm (31) is mounted on the second connecting block (30) and hinged thereto. The two baffle plates (25) are connected to the two end walls of the baffle plate groove (26) by a first spring (32).

3. The adjustable-line hot melt coating and marking machine according to claim 2, characterized in that, A solenoid valve (33) is fixed on the cylinder (27), and the solenoid valve (33) is electrically connected to the cylinder (27). The surface of the cylinder (27) is covered with a high-temperature resistant protective sleeve.

4. An adjustable-line hot melt coating and marking machine according to any one of claims 1-3, characterized in that, The body (22) is also fixed with a hot melt kettle (1). The hot melt kettle (1) is internally divided into a coating inner cavity (2) and a heat-conducting outer cavity (3). The heat-conducting outer cavity (3) covers the outside of the coating inner cavity (2). The discharge hopper (23) is internally divided into a storage inner cavity (34) and a heat-insulating outer cavity (35). The heat-insulating outer cavity (35) covers the outside of the storage inner cavity (34). The interior of the heat-conducting outer cavity (3) and the interior of the heat-insulating outer cavity (35) are both filled with heat-conducting oil (6). The interior of the coating cavity (2) is fixed with a heating coil (5). The heating coil (5) surrounds the outer wall of the coating cavity (2) and is immersed in the heat transfer oil (6). The heat transfer cavity (3) and the insulation cavity (35) are provided with an oil supply pipe (36) and an oil return pipe (37). The heat transfer cavity (3) and the insulation cavity (35) are connected by the oil supply pipe (36) and the oil return pipe (37). An oil pump (38) is provided on the oil supply pipe (36) and an oil return pump (39) is provided on the oil return pipe (37).

5. The adjustable-line hot melt coating and marking machine according to claim 4, characterized in that, The top of the hot melt kettle (1) is provided with a feeding port (40) that communicates with the inner cavity (2) of the coating, and a cover (41) is hinged to the feeding port (40).

6. The adjustable-line hot melt coating and marking machine according to claim 4, characterized in that, The discharge port (24) is connected to the storage cavity (34). A pressure regulating port (42) is provided at the top of the storage cavity (34). An air compressor is fixed on the machine body (22). The air compressor and the pressure regulating port (42) are connected through a pressure regulating pipe (43). The paint cavity (2) and the storage cavity (34) are connected through a conveying pipe (44). A conveying pump (45) is provided on the conveying pipe (44). A rotating baffle (46) is hinged on the cavity wall of the storage cavity (34). The rotating baffle (46) is adapted to the port of the conveying pipe (44) and can cover the port of the conveying pipe (44).

7. The adjustable-line hot melt coating and marking machine according to claim 4, characterized in that, The inner cavity (2) of the coating is equipped with a drive shaft (4) for rotation. Several stirring rods are distributed on the side wall of the drive shaft (4). A transmission mechanism corresponding to the stirring rods is mounted on the drive shaft (4). The stirring rods are rotatably connected to the drive shaft (4) through the transmission mechanism.

8. The adjustable-line hot melt coating and marking machine according to claim 7, characterized in that, A hydraulic motor (7) is fixed to the top of the hot melt kettle (1). The top end of the drive shaft (4) passes through the top wall of the coating cavity (2) and is connected to the output end of the hydraulic motor (7). A fixed platform (8) is fixed to the bottom wall of the coating cavity (2). A fixed base rod (9) is vertically fixed on the fixed platform (8). A base rod through hole (10) adapted to the fixed base rod (9) is opened at the bottom end of the drive shaft (4). The fixed base rod (9) extends into the base rod through hole (10) and rotates with the drive shaft (4). An annular cavity (11) corresponding to the stirring rod is opened on the inner wall of the base rod through hole (10). The transmission mechanism includes a first cone. The gear (12) and the second bevel gear (13) are fixedly sleeved on the fixed base rod (9) and located in the annular cavity (11). The stirring rod includes a transmission rod (14) and a stirring rod (15). The cavity wall of the annular cavity (11) is provided with a transmission rod through hole (16). The transmission rod (14) passes through the transmission rod through hole (16) and is rotatably connected to the drive shaft (4). The inner end of the transmission rod (14) extends into the annular cavity (11) and is fixedly installed with the second bevel gear (13). The second bevel gear (13) meshes with the first bevel gear (12). The stirring rod (15) is installed on the outer end of the transmission rod (14).

9. The adjustable-line hot melt coating and marking machine according to claim 8, characterized in that, The stirring rod (15) is provided with a spiral rod section (17), which is located in the middle of the rod body of the stirring rod (15). The spiral rod section (17) is arranged in a continuous spiral bend along the axis of the stirring rod (15).

10. The adjustable-line hot melt coating and marking machine according to claim 9, characterized in that, The outer end face of the transmission rod (14) is provided with a stirring rod groove (18) adapted to the stirring rod (15). One end of the stirring rod (15) extends into the stirring rod groove (18) and slides in cooperation with the stirring rod groove (18). A second spring (19) is provided between the end face of the stirring rod (15) and the bottom of the stirring rod groove (18). The cavity wall of the coating cavity (2) is fixed with several bosses (20). The bosses (20) are evenly arranged circumferentially with the central axis of the drive shaft (4) as the center. The bosses (20) and the stirring rod (15) are in the same plane of rotation. The bosses (20) face the drive shaft (4). 4) An inclined guide surface (21) is provided on one side of the central axis. The vertical distance between the inclined guide surface (21) and the central axis of the drive shaft (4) gradually decreases along the extension direction of the inclined guide surface (21). When the stirring rod (15) revolves with the transmission rod (14), its free end slides along the inclined guide surface (21). It can be pushed by the inclined guide surface (21) to drive the stirring rod (15) to slide towards the bottom of the stirring rod groove (18) and compress the second spring (19). When the free end of the stirring rod (15) slides away from the inclined guide surface (21), the stirring rod (15) extends away from the bottom of the stirring rod groove (18) under the elastic force of the second spring (19) and resets.

Images