Continuous Automated Printing Equipment and Process for Automotive Hose Surface

Abstract

This invention discloses a continuous automated printing device and process for automotive hoses, belonging to the field of printing device technology. It includes a main body, a plasma surface processor, an inkjet printer, and a drying component; it also includes: an unwinding component for releasing the hose; a straightening component for straightening the unwound hose; a positioning component for preventing the hose from deflecting circumferentially during the traction process; and a winding component for winding the printed hose. The plasma surface processor's nozzle and the inkjet printer's printhead are both at an angle of 30° to 60° to the ground. By setting the plasma surface processor's nozzle and the inkjet printer's printhead in an inclined state, this invention positions the processing and printing on the hose's outer wall at an angle slightly above the hose's end face. This ensures that the printed area is positioned precisely in the gap between the hose sections during winding, preventing friction between the printed area and the winding hose and avoiding the problem of the printed area being rubbed off before it has fully solidified.

Description

Technical Field

[0001] This invention relates to the field of printing equipment technology, specifically to a continuous automated printing device and process for automotive hose surfaces. Background Technology

[0002] As a key identification technology, surface printing on rubber hoses plays an important role in the production and application of various rubber hose products. By accurately printing manufacturer information (such as company name, production address, contact information, etc.), core product specifications (such as diameter, length, material composition, working pressure range, etc.), and traceability markings such as production batch number and serial number on the surface of the rubber hose, it not only provides a clear basis for the entire life cycle management of the product, helping to achieve full traceability from production, distribution to use and recycling, but also provides accurate guidance to operators in installation, maintenance and other stages, effectively reducing the risk of misoperation, thereby significantly improving the safety and reliability of the product.

[0003] The core principle of inkjet printing on rubber hoses is to use specialized inks to form the desired markings on the outer surface of the hose. However, because rubber hoses are often used in complex and variable environments, the ink markings on their surface are highly susceptible to corrosion from various factors. For example, in the automotive and machinery industries, hoses may come into contact with organic solvents such as gasoline, diesel, and alcohol, which can dissolve or soften the ink. At the same time, water mist and humid environments accelerate the aging and peeling of the ink, while long-term friction and vibration can cause the markings to gradually fade and become blurred, seriously affecting the recognizability and durability of the markings.

[0004] Existing technology proposes a printing process for the surface of rubber hoses (publication number CN119704918A). This invention first uses a plasma surface processor to perform plasma cleaning on the surface of the rubber hose. Plasma cleaning can remove impurities from the surface of the rubber hose and attach polar groups to the surface, increasing the surface free energy and significantly improving the adhesion of ink to the surface of the rubber hose. Secondly, this invention sprays a protective coating on the outside of the ink marking. The protective coating provides waterproofing, oil resistance, stain resistance, and corrosion resistance to the ink marking, improving the stability of the ink in the usage environment without affecting the marking function. Although this solution can improve processing efficiency through a continuous automated production mode of unwinding on one side and traction winding on the other side, it faces the problem of insufficient marking curing. Although existing technologies employ corresponding auxiliary curing methods, the time required for the curing process limits the printed areas to be fully hardened during the winding stage. At this time, the tubing overlaps with each other during winding, inevitably causing compression and scraping between the tubing. This physical action directly impacts the incompletely cured markings, easily damaging the bond between the ink and the tubing surface, resulting in the text being rubbed off or blurred, thus affecting the integrity and readability of the markings and making it difficult to meet the requirements for marking stability during long-term use. Summary of the Invention

[0005] The purpose of this invention is to provide a continuous automated printing device and process for automotive hoses, in order to solve the problem mentioned in the background art that the printed text is easily rubbed off during hose winding due to mutual friction.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A continuous automated printing device for automotive hoses includes a main body, a plasma surface processor, an inkjet printer, and a drying component; it also includes: an unwinding component located at the front of the main body for releasing the hose; a straightening component for straightening the unwound hose; positioning components located on both sides of the plasma surface processor and the inkjet printer for preventing the hose from deflecting circumferentially during the traction process; and a winding component located at the rear of the main body for winding the printed hose; the nozzles of the plasma surface processor and the inkjet printer are both at a 30° angle to the ground. At a 60° angle, the height of the text printed on the hose by the inkjet printer is 8% to 16% of the outer circumference of the hose. A compression structure is set on the main table and behind the drying component. The compression structure is used to temporarily compress and deform the hose. After deformation, the long axis of the hose is perpendicular to the axis of the winding component, and the short axis is parallel to the axis of the winding component. The drying component is a hot air dryer, including a mounting base and a hot air gun fixedly connected to the top of the mounting base. The output of the hot air gun is a long strip-shaped air outlet, which is used to provide strip-shaped hot air along the hose traction path.

[0008] By adopting the above technical solution, by setting the gun head of the plasma surface processor and the print head of the inkjet printer to an inclined state, the processing and printing position on the outer wall of the rubber tube is located obliquely above the end face of the rubber tube. This ensures that the printing part is exactly in the gap between the rubber tubes when the rubber tube is wound after processing, so that the printing part will not rub against the wound rubber tube, thus avoiding the problem of the printing part being rubbed off before it is completely solidified.

[0009] Furthermore, by setting up a hot air dryer as a drying component to dry the printed tubing, the printed area can be quickly solidified. On the other hand, the hot air acting on the tubing weakens the intermolecular forces of the rubber molecules, making the molecular chain segments more "relaxed." After being flattened, the "driving force" for elastic recovery is temporarily reduced, thus slowing down the rebound speed. Based on this solution, a compression component is also set up to temporarily flatten the tubing into an elliptical cross-section. The long axis of the deformed tubing is perpendicular to the axis of the winding component, and the short axis is parallel to the axis of the winding component. This allows the tubing to be arranged axially along the short axis when wound on the winding component, and to rebound and recover in a short time. This avoids the problem of the printed area being rubbed off due to the tubing being too tightly wound during the winding process, thus improving the printing effect.

[0010] A further improvement of the technical solution of the present invention is that: the extrusion structure includes an adjustment seat fixedly connected to the main body, two screws are symmetrically rotatably connected to the inner side of the adjustment seat, the two screws are fixedly connected at their close ends, one end of one screw extends to the outside of the adjustment seat and is fixedly connected to a knob, two adjustment blocks are symmetrically threaded to the outside of the two screws, the adjustment blocks are slidably connected to the adjustment seat, a through hole is opened on the adjustment block, and a pressure rod is slidably connected to the inner wall of the through hole, an L-shaped plate is fixedly connected to the close ends of the two pressure rods, a limit block is fixedly connected to the far ends of the pressure rods, a third spring is sleeved outside the pressure rod and between the adjustment block and the L-shaped plate, and a pressure roller is rotatably connected to the top of the L-shaped plate.

[0011] By adopting the above technical solution, by setting adjustable blocks with adjustable spacing and connecting the pressure rollers used to squeeze the hose to the adjustable blocks using an elastic structure, the spacing of the pressure rollers can be flexibly adjusted according to the diameter of the hose, thereby meeting the different squeezing requirements of the hose and adapting to hoses of different materials or diameters.

[0012] A further improvement of the technical solution of the present invention is that: the positioning component includes a positioning seat fixedly connected to the main body platform, a slide table slidably connected to the top of the positioning seat, a transmission box fixedly connected to the top of the slide table, two first slide rods symmetrically fixedly connected between the inner walls of the transmission box, a first slider slidably connected to the outside of each of the first slide rods, a rack fixedly connected to the side of each of the two first sliders that are close to each other, a central gear rotatably connected between the transmission box and the slide table, the central gear meshing with both racks, and a first spring sleeved on the outside of each of the first slide rods, with the two first springs centered opposite each other. The transmission box has two centrally symmetrical slots. The top of the first slider passes through the slot and is fixedly connected to a clamping block. The side of the clamping block that is close to each other has an arc surface that is concave towards the center, and the arc surface of the clamping block is made of rubber. A cylinder is fixedly installed on the top of the slide table. The piston rod of the cylinder contacts the side of the first slider away from the first spring. A sliding groove is opened in the middle of the positioning seat. A second sliding rod is fixedly connected between the inner walls of the sliding groove. A second slider is slidably connected to the outside of the second sliding rod. The second slider is fixedly connected to the slide table. A second spring is sleeved on the outside of the second sliding rod.

[0013] By adopting the above technical solution and setting positioning components, the hose can be restricted. Specifically, the restriction is to prevent it from rotating in the circumferential direction, not to restrict the hose from being transported in the axial direction, and to provide support points to reduce the sagging of the printing area. This makes the printing area of ​​the hose straighter and more stable, ensuring that the printing area is on the same axis as the hose. It also ensures that the plasma treatment area and the printing area are in the same area, avoiding the situation where the two treatment areas deviate from each other and thus affect the printing effect.

[0014] A further improvement of the technical solution of the present invention is as follows: the straightening component includes an upper guide frame, a first guide wheel is provided on the side of the upper guide frame near the unwinding component, the first guide wheel is located above the unwinding component, the first guide wheel is arranged along the tangent direction of the hose unwinding reel, the hose is led vertically upward and then passes around the first guide wheel; a traction ring is fixedly connected on the side of the upper guide frame near the first guide wheel, after the hose is released from the unwinding reel, it passes through the traction ring towards the first guide wheel and the traction direction is vertically upward; a second guide wheel and a third guide wheel are provided on the side of the upper guide frame column away from the first guide wheel, the second guide wheel is set at the same height as the first guide wheel, the hose passes around the first guide wheel and then passes around the second guide wheel and becomes vertically downward; the lower edge height of the third guide wheel is consistent with the center height of the subsequent hose printing production line, the hose passes around the second guide wheel and then passes around the third guide wheel and becomes horizontal.

[0015] The above technical solution incorporates a drive mechanism that controls the unwinding reel to rotate actively. The unwinding reel is rotated by the unwinding mechanism, and the hose is vertically led out from above. The hose only moves in a straight line and does not rotate around its own axis. This prevents the released coaxial hose from experiencing fluctuations caused by torsion and eliminates periodic ripples caused by torsion, thereby reducing misalignment caused by hose twisting during subsequent printing.

[0016] A further improvement of the technical solution of the present invention is as follows: a base is fixedly connected to the tail of the main body, a linear module is fixedly installed on the top of the base, a carrier plate is fixedly connected to the movable end of the linear module, the linear module can control the carrier plate to perform reciprocating linear motion, and a winding component is installed on the top of the carrier plate; a pressure sensor is fixedly installed on one side of the adjusting block, the limiting block is in contact with the signal acquisition part of the pressure sensor, and the pressure sensor, the linear module and the winding component are all electrically connected to an external control device.

[0017] Using the above technical solution, the winding process controls the rotation of the tube disc through the unwinding component on the one hand, and controls the entire unwinding component (and tube disc) to move slowly along the axis through the linear module on the other hand. Each time the tube disc winds one revolution, it will move along the axis to the position of the next revolution, so that it can be completely laid flat.

[0018] A further improvement of the technical solution of the present invention is as follows: a base is fixedly connected to the table surface of the main body, an installation ring is rotatably connected to the inner side of the base, an internal gear ring is fixedly connected to one side of the installation ring, an installation rod is fixedly connected through the installation ring, the gun head of the plasma surface processor and the print head of the inkjet printer are both fixedly installed on the installation rod, an adjustment motor is fixedly installed on the table surface of the main body, a drive gear is fixedly connected to the output end of the adjustment motor, and the drive gear meshes with the internal gear ring.

[0019] By adopting the above technical solution, the plasma surface processor's nozzle and the inkjet printer's printhead are mounted on an adjustable mounting rod. During the printing process when the winding component is not in the outermost winding state, the control rod ensures that both the plasma surface processor's nozzle and the inkjet printer's printhead are at an angle of 30° to 60° to the ground, thus achieving the desired printing effect. When printing reaches the last small section of the tube, this section is wound on the outermost layer of the winding component. Therefore, there is no friction from other tubes on the side away from the axis, but printing on this side greatly facilitates reading.

[0020] A further improvement of the technical solution of the present invention is that: multiple wheel seats are fixedly connected to the table surface of the main body, and auxiliary support wheels are rotatably connected to the top of each wheel seat.

[0021] In this embodiment, the hose needs to travel a long path during the production process, which can easily cause the middle of the hose to sag or sway. Therefore, multiple sets of auxiliary support wheels are set on the hose traction path to provide auxiliary support for the hose and prevent printing misalignment caused by hose sagging, thereby improving the printing effect.

[0022] A further improvement of the technical solution of the present invention is that: a number of protrusions parallel to the traction direction of the hose are provided on one side of the clamping block with an arc surface.

[0023] By adopting the above technical solution, the gripping ability of the clamping block is improved by setting protrusions, which further reduces the deflection of the hose in the circumferential direction, thereby improving the stability of the processing.

[0024] This invention also provides a continuous automated printing process for the surface of automotive hoses, comprising the following steps:

[0025] S1: Unwinding and straightening: The hose is released through the unwinding component. The hose is guided by the straightening component and conveyed in a straight line without circumferential twisting, releasing the internal curling stress and reducing twisting deviation in subsequent processing.

[0026] Release the internal coiling stress of the hose to avoid periodic ripples caused by torsion and reduce positional deviations in subsequent processing.

[0027] S2: Positioning constraint: The hose enters the positioning component, which restricts the circumferential deflection of the hose without obstructing axial transport, ensuring that the processing and printing positions are consistent.

[0028] S3: Plasma treatment and inkjet printing: The plasma surface processor nozzle treats the tube surface at an angle of 30° to 60° with the ground, and then the inkjet printer nozzle prints text on the treated area at the same angle to ensure accurate printing position.

[0029] Plasma treatment enhances the surface free energy and ink adhesion of the hose; the tilted angle design places the printing position diagonally above the hose, leaving a gap for subsequent winding; the text proportions are adapted to the hose size, ensuring clear markings without affecting hose performance.

[0030] S4: Drying treatment: The rubber hose is dried by medium-low temperature hot air at 40-60℃ through the long air outlet of the hot air dryer, which accelerates the evaporation of ink solvent and the curing of resin, while weakening the intermolecular forces of rubber to delay rebound.

[0031] It accelerates the evaporation of solvents in ink and the cross-linking and curing of resin, thereby increasing the solidification speed of the marking; at the same time, it weakens the intermolecular forces of rubber, delays the rebound of the tubing, and provides conditions for subsequent extrusion deformation.

[0032] S5: Extrusion Deformation: After drying, the tubing is temporarily extruded into an oval shape through the extrusion structure to prevent the printed area from rubbing against other tubing during rewinding.

[0033] Arrange the tubing along the short axis when winding it up to avoid direct friction between the printed area and other tubing, thus protecting the markings that are not fully cured.

[0034] S6: Rewinding Adjustment: The rewinding unit rewinds the deformed hose, making the hose neatly arranged and wound on the reel.

[0035] Ensure that the hoses are neatly arranged on the winding component, avoiding overlap or skewing.

[0036] By adopting the above technical solution, the technical effects achieved by this invention compared to the prior art are as follows:

[0037] 1. This invention sets the gun head of the plasma surface processor and the print head of the inkjet printer in an inclined state, so that the processing and printing position on the outer wall of the rubber tube is obliquely above the end face of the rubber tube. This ensures that the printed part is exactly in the gap between the rubber tubes when the rubber tube is wound after processing, so that the printed part will not rub against the wound rubber tube, thereby avoiding the problem of the printed part being rubbed off before it is completely solidified.

[0038] 2. This invention provides a continuous automated printing device and process for automotive rubber hoses. By setting up a hot air dryer as a drying component to dry the printed rubber hose, the printed area can be quickly solidified. On the other hand, the hot air acting on the hose weakens the intermolecular forces of rubber, making the molecular chain segments easier to "relax". After being flattened, the "driving force" for elastic recovery is temporarily reduced, thereby slowing down the rebound speed. Based on this solution, a compression component is also set up to temporarily flatten the rubber hose into an elliptical cross-section. The long axis of the deformed rubber hose is perpendicular to the axis of the winding component, and the short axis is parallel to the axis of the winding component. This allows the rubber hose to be arranged axially along the short axis when wound on the winding component, and to rebound and recover in a short time. This avoids the problem of the printed area being rubbed off due to the rubber hose being too tightly wound during the winding process, thus improving the printing effect.

[0039] 3. By setting an adjustable block with adjustable spacing and connecting the pressure roller for squeezing the hose to the adjustable block using an elastic structure, the spacing of the pressure roller can be flexibly adjusted according to the diameter of the hose, thereby meeting the squeezing requirements of the hose to different degrees and adapting to hoses of different materials or diameters.

[0040] 4. By setting positioning components, the present invention can restrict the hose. Specifically, it prevents the hose from rotating in the circumferential direction, does not restrict the hose from being transported in the axial direction, and provides support points to reduce the sagging of the printing area. This makes the printing area of ​​the hose straighter and more stable, ensuring that the printing area is on the same axis as the hose. It also ensures that the plasma treatment area and the printing area are in the same area, avoiding deviation between the two treatment areas that would affect the printing effect.

[0041] 5. This invention provides a straightening component behind the unwinding component, which leads the tubing vertically out from above and straightens and turns it along each guide wheel. Finally, the tubing is fed into the processing area in a coaxial manner with the processing position. During the process, the tubing only moves in a straight line and does not rotate around its own axis. In this way, the released coaxial tubing will not have fluctuations caused by torsion and there will be no periodic ripples caused by torsion, thereby reducing the misalignment caused by tubing twisting during subsequent printing. Attached Figure Description

[0042] The invention will now be further described with reference to the accompanying drawings.

[0043] Figure 1 This is a schematic diagram of the overall structure of the present invention from a first-view perspective;

[0044] Figure 2 This is a schematic diagram of the overall structure of the invention from a second perspective;

[0045] Figure 3 This is a schematic diagram of the overall front view structure of the present invention;

[0046] Figure 4 This is a three-dimensional structural diagram of the positioning component of the present invention;

[0047] Figure 5 This is a schematic diagram of the disassembled structure of the positioning component of the present invention;

[0048] Figure 6 This is a schematic diagram of the installation structure of the plasma surface processor and the inkjet printer of the present invention;

[0049] Figure 7 This is a cross-sectional view of the base of the present invention;

[0050] Figure 8 This is a three-dimensional schematic diagram of the extrusion structure of the present invention;

[0051] Figure 9 This is a schematic diagram of the winding tube reel structure on the winding component of the present invention;

[0052] Figure 10 For the present invention Figure 4 Enlarged view of point A in the middle;

[0053] Figure 11 For the present invention Figure 8 Enlarged view at point B in the middle;

[0054] Figure 12 For the present invention Figure 9 Enlarged view of point C and schematic diagram showing several printing schemes based on this view.

[0055] In the diagram: 1. Unwinding component; 2. Rewinding component; 3. Straightening component; 301. Upper guide frame; 302. First guide wheel; 303. Second guide wheel; 304. Third guide wheel; 305. Traction ring; 4. Positioning component; 401. Positioning seat; 402. Slide table; 403. Transmission box; 404. First slide rod; 405. First slider; 406. First spring; 407. Central gear; 408. Rack; 409. Strip groove; 410. Cylinder; 411. Clamping block; 412. Slide groove; 413. Second slide rod; 414. Second spring; 415. Second slider; 41 6. Protruding bar; 501. Base; 502. Mounting ring; 503. Internal gear ring; 504. Adjusting motor; 505. Drive gear; 506. Mounting rod; 507. Plasma surface processor; 508. Inkjet printer; 6. Extrusion structure; 601. Adjusting seat; 602. Screw; 603. Adjusting block; 604. Pressure rod; 605. Third spring; 606. L-shaped plate; 607. Pressure roller; 608. Limiting block; 609. Pressure sensor; 701. Base; 702. Linear module; 703. Carrier plate; 8. Drying component; 9. Main body; 10. Auxiliary support wheel. Detailed Implementation

[0056] The present invention will be further described in detail below with reference to the embodiments.

[0057] Example 1

[0058] like Figures 1-12 As shown, this invention provides a continuous automated printing device for automotive hose surfaces, including a main body 9, a plasma surface processor 507, an inkjet printer 508, and a drying component 8; it also includes: an unwinding component 1, located at the front of the main body 9, for releasing the hose; a straightening component 3, for straightening the unwound hose; a positioning component 4, located on both sides of the plasma surface processor 507 and the inkjet printer 508, for preventing the hose from deflecting circumferentially during the traction process; a winding component 2, located at the rear of the main body 9, for winding the printed hose; and the printing nozzle of the plasma surface processor 507 and the inkjet printer 508. The nozzles are all at an angle of 30° to 60° to the ground. The height of the text printed on the rubber tube by the inkjet printer 508 is 8% to 16% of the outer circumference of the rubber tube. A compression structure 6 is set on the table of the main body 9 and behind the drying component 8. The compression structure 6 is used to temporarily compress and deform the rubber tube. The long axis of the deformed rubber tube is perpendicular to the axis of the winding component 2, and the short axis is parallel to the axis of the winding component 2. The drying component 8 is a hot air dryer, including a mounting base and a hot air gun fixedly connected to the top of the mounting base. The output part of the hot air gun is a long strip-shaped air outlet, which is used to provide strip-shaped hot air along the traction path of the rubber tube.

[0059] In this embodiment, by setting the nozzle of the plasma surface processor 507 and the printhead of the inkjet printer 508 to an inclined state, the processing and printing position on the outer wall of the tubing is located diagonally above the end face of the tubing. This ensures that the printed area is positioned precisely at the gap between the tubing sections during winding, preventing friction between the printed area and the winding tubing. This avoids the problem of the printed area being rubbed off before it has fully solidified. The actual printing effect can be seen by referring to... Figure 9 and Figure 12 ,in Figure 9 The image shows a cross-sectional view of the hose and reel during the winding process. To clearly show the printing area, the cross-sectional lines on the hose are not included. Figure 9 It can be seen that the printed area on the tubing is directly opposite the gap between adjacent tubing sections, therefore it will not be worn away; for example... Figure 12 This demonstrates the different height percentages of printed content corresponding to several different tilt angles;

[0060] Furthermore, to improve processing efficiency, this solution includes an unwinding component 1 at the front end of the inkjet printer 508 and a winding component 2 at the rear end of the inkjet printer 508, thereby enabling the unwinding and winding process to perform the above-mentioned printing operations and achieve continuous automated printing. After the tubing is unwound, it passes through a straightening component 3 to release the internal stress of the tubing and prevent twisting during subsequent processing. Positioning components 4 are provided at both the front end of the plasma surface processor 507 and the rear end of the inkjet printer 508, which can fix the tubing circumferentially during plasma treatment and printing without hindering its axial transport, thereby further preventing the tubing from deflecting and ensuring that the printing position is always on the same axis.

[0061] In addition, the tubing needs to be wound up after printing. Although it is dried by the drying unit 8 during the process, the printed area is still not completely solidified due to time constraints. During the winding process, friction occurs between the tubing, which can easily rub off the printed area.

[0062] In this embodiment, a hot air dryer is used as the drying component 8 to dry the printed rubber tube. On the one hand, the printed area can be quickly solidified. On the other hand, the hot air acts on the rubber tube, weakening the intermolecular forces and making the molecular chain segments more "relaxed". After being flattened, the "driving force" for elastic recovery is temporarily reduced, thereby slowing down the rebound speed. Based on this solution, a compression component is also provided, which can temporarily flatten the rubber tube into an elliptical cross-section. The long axis of the deformed rubber tube is perpendicular to the axis of the winding component 2, and the short axis is parallel to the axis of the winding component 2. This allows the rubber tube to be arranged axially along the short axis when it is wound on the winding component 2, and to rebound and recover in a short time. This avoids the problem of the printed area being rubbed off due to the rubber tube being too tightly wrapped during the winding process, thus improving the printing effect.

[0063] Preferably, the output mode of the hot air dryer is medium-low temperature heating of 40-60℃. At this temperature, the evaporation rate of solvent in ink can be significantly accelerated (molecular motion intensifies, and solvent is more likely to detach from ink film). At the same time, the activity of resin molecules is moderately increased, promoting their cross-linking or hardening reaction, thereby accelerating the solidification of printed markings without damaging the tube, but the rebound recovery speed of the tube will be slowed down.

[0064] It is important to note that the height of the printed text should be 8% to 16% of the outer circumference of the tubing, meaning the font size should cover an arc of approximately 30 to 60 degrees (less than this range). This is to avoid the font being too large and exceeding the contact point with adjacent tubing, thus affecting the effect of the tilted printing in the design (see reference for details). Figure 9 and Figure 12 As shown, when the printed text is too large, it can easily extend beyond the contact area between adjacent tubing.

[0065] like Figure 1-5 As shown, preferably, the extrusion structure 6 includes an adjustment seat 601 fixedly connected to the main body 9. Two screws 602 are symmetrically rotatably connected to the inner side of the adjustment seat 601. The ends of the two screws 602 that are close to each other are fixedly connected. One end of one screw 602 extends to the outside of the adjustment seat 601 and is fixedly connected to a knob. Two adjustment blocks 603 are symmetrically threaded to the outside of the two screws 602. The adjustment blocks 603 are slidably connected to the adjustment seat 601. A through hole is opened on the adjustment block 603, and a pressure rod 604 is slidably connected to the inner wall of the through hole. An L-shaped plate 606 is fixedly connected to the ends of the two pressure rods 604 that are close to each other. A limit block 608 is fixedly connected to the ends of the pressure rods 604 that are far apart from each other. A third spring 605 is sleeved on the outside of the pressure rod 604 and between the adjustment block 603 and the L-shaped plate 606. A pressure roller 607 is rotatably connected to the top of the L-shaped plate 606.

[0066] In actual production, it may be necessary to print on tubing of different diameters or materials, which means that different degrees of extrusion are required to meet production needs.

[0067] In this embodiment, by controlling the rotation of the two screws 602, the two adjusting blocks 603 can be driven to move in opposite directions or in the opposite direction, and the L-shaped plate 606 and the pressure roller 607 can be moved, thereby meeting the different extrusion requirements of the hose to adapt to hoses of different materials or diameters.

[0068] During operation, first turn the knob to drive the two coaxial screws 602 to rotate synchronously, causing the two adjusting blocks 603 to move synchronously to the side away from each other, and driving the two pressure rollers 607 to move to the side away from each other, thus making it easy to pass the hose between the two pressure rollers 607. After passing the hose between the two pressure rollers 607 and pulling it, turn the knob in the opposite direction of the above operation, causing the screws 602 to rotate in the opposite direction to drive the two adjusting blocks 603 to move to the side closer to each other, and driving the two pressure rollers 607 to move to the side closer to each other, slightly flattening the hose. Because the tube undergoes a medium-low temperature heating treatment (drying) before flattening, its resilience is temporarily reduced. Therefore, the tube will not spring back immediately, but will gradually spring back after winding. The flattened tube is arranged outside the tube reel with its short axis parallel to the axis. Therefore, the tube does not need to rub against the already wound tube during the arrangement process, thus reducing the impact of scratching on the printed area. It should be noted that the above solution delays the rebound by drying the tube at a medium-low temperature. This temperature will not damage or cause permanent deformation of the tube. It can be used normally after its temperature returns to normal at room temperature.

[0069] Example 2

[0070] like Figure 4 , Figure 5 and Figure 10As shown, based on Embodiment 1, the present invention provides a technical solution: Preferably, the positioning component 4 includes a positioning seat 401 fixedly connected to the table surface of the main body 9. A slide table 402 is slidably connected to the top of the positioning seat 401. A transmission box 403 is fixedly connected to the top of the slide table 402. Two first slide rods 404 are symmetrically fixedly connected between the inner walls of the transmission box 403. A first slider 405 is slidably connected to the outside of each of the first slide rods 404. A rack 408 is fixedly connected to the side of each of the two first sliders 405 that are close to each other. A central gear 407 is rotatably connected between the transmission box 403 and the slide table 402. The central gear 407 is meshed with both racks 408. A first spring 406 is sleeved on the outside of each of the first slide rods 404, and the two first springs 406 are in a certain position. The transmission box 403 is centrally symmetrical, with two strip grooves 409. The top of the first slider 405 passes through the strip groove 409 and is fixedly connected to a clamping block 411. The side of the clamping block 411 that is close to each other has an arc surface that is concave towards the center, and the arc surface of the clamping block 411 is made of rubber. A cylinder 410 is fixedly installed on the top of the slide table 402. The piston rod of the cylinder 410 contacts the side of the first slider 405 away from the first spring 406. A sliding groove 412 is opened in the middle of the positioning seat 401. A second sliding rod 413 is fixedly connected between the inner walls of the sliding groove 412. A second slider 415 is slidably connected to the outside of the second sliding rod 413. The second slider 415 is fixedly connected to the slide table 402. A second spring 414 is sleeved on the outside of the second sliding rod 413.

[0071] Although the above scheme sets up a straightening component 3 to straighten the tube before printing, the tube extends a long distance along the axis, so it is inevitable that it will shake during the traction process, and the parts of the tube that are not supported will bend downwards. As a result, it is difficult to ensure that the printing process is carried out along the position and path envisioned in the scheme.

[0072] In this embodiment, by setting the positioning component 4, the hose can be restricted. Specifically, the restriction is to prevent it from rotating in the circumferential direction, not to restrict the hose from being transported in the axial direction, and to provide a support point to reduce the sagging of the printing area. This makes the printing area of ​​the hose straighter and more stable, ensuring that the printing area is on the same axis as the hose, and also ensuring that the plasma treatment area and the printing area are in the same area, avoiding the situation where the two treatment areas deviate from each other and thus affect the printing effect.

[0073] During operation, the piston rod of the initial cylinder 410 is extended, causing the first slider 405 to compress the first spring 406. At the same time, the two clamping blocks 411 are relatively far apart, allowing the tube to pass through easily. When plasma treatment and printing are required, the cylinder 410 is retracted, causing the first slider 405 to move closer to the cylinder 410 under the rebound of the first spring 406. The centering structure composed of the rack 408 and the gear causes the first slider 405 on the other side to move synchronously. The movement trajectories of the two first sliders 405 are centrally symmetrical, causing the two clamping blocks 411 to move closer to each other, clamping and slightly flattening the tube. The flattened tube has a non-circular cross-section, making it difficult to deflect, thus ensuring that the tube in the area between the two positioning components 4 will not deflect circumferentially. After clamping, the hose remains in a traction conveying state. Under the frictional force between the clamping block 411 and the hose, the slide table 402 and its top structure are pulled and moved in the traction direction. During this process, the second slider 415 compresses the second spring 414 (the compressible distance is greater than the distance from before plasma treatment to after printing). After printing, the control cylinder 410 moves to its initial state (extended state), and the centering structure causes the two first sliders 405 and the clamping block 411 to move to opposite sides, releasing the hose. After the hose is released, the clamping block 411 also loses the frictional traction, and thus resets under the rebound action of the second spring 414, waiting for the next positioning.

[0074] It should be noted that in the actual production process, the printing area on the hose is not printed continuously along the axis, but is printed at intervals. The reset area of ​​the clamping block 411 in the above scheme is included in the interval segment in the actual production process.

[0075] Example 3

[0076] like Figure 1 , Figure 2 and Figure 3As shown, based on Embodiment 2, the present invention provides a technical solution: Preferably, the straightening component 3 includes an upper guide frame 301, and a first guide wheel 302 is provided on the side of the upper guide frame 301 near the unwinding component 1. The first guide wheel 302 is located above the unwinding component 1 and is arranged along the tangential direction of the hose unwinding reel. After the hose is vertically drawn upward, it passes around the first guide wheel 302. A traction ring 305 is fixedly connected to the side of the upper guide frame 301 near the first guide wheel 302. After the hose is released from the unwinding reel, it passes through the traction ring 305. 05. The first guide wheel 302 is tractioned vertically upward; the upper guide frame 301 column is provided with a second guide wheel 303 and a third guide wheel 304 on the side away from the first guide wheel 302. The second guide wheel 303 is set at the same height as the first guide wheel 302. After the hose passes around the first guide wheel 302, it passes around the second guide wheel 303 and becomes vertically downward. The lower edge of the third guide wheel 304 is at the same height as the center of the subsequent hose printing production line. After the hose passes around the second guide wheel 303, it passes around the third guide wheel 304 and becomes horizontal.

[0077] Because the hose has internal stress after being unwound while in the winding state, the hose tends to curl, which makes it easy for the hose to deflect during the subsequent printing process, making it impossible to ensure that the printing is carried out along the same axis.

[0078] In this embodiment, the unwinding component 1 has a drive inside, which can control the unwinding reel to rotate actively. The unwinding component 1 drives the unwinding reel to rotate and leads the rubber tube vertically out from above. The rubber tube only moves in a straight line and does not rotate around its own axis. In this way, the released coaxial rubber tube will not have fluctuations caused by torsion and there will be no periodic ripples caused by torsion, thereby reducing the misalignment caused by rubber tube twisting during subsequent printing.

[0079] During operation, the hose is released from the unwinding reel and passes sequentially through the traction ring 305, the first guide wheel 302, the second guide wheel 303, and the third guide wheel 304 before entering the processing area (including positioning, plasma treatment, and printing). The hose's state between each of these stages is as follows: vertically upward traction, horizontal traction, and vertically downward traction. After passing the third guide wheel 304, the hose enters the processing area horizontally. The hose's height after passing the third guide wheel 304 is coaxial with the subsequent processing position, thus ensuring that the hose only moves in a straight line and does not rotate around its own axis, preventing fluctuations caused by torsion.

[0080] like Figure 2 , Figure 8 and Figure 11As shown, preferably, a base 701 is fixedly connected to the tail of the main body 9, a linear module 702 is fixedly installed on the top of the base 701, a carrier plate 703 is fixedly connected to the movable end of the linear module 702, the linear module 702 can control the carrier plate 703 to perform reciprocating linear motion, and the winding component 2 is installed on the top of the carrier plate 703; a pressure sensor 609 is fixedly installed on one side of the adjusting block 603, the limiting block 608 is in contact with the signal acquisition part of the pressure sensor 609, and the pressure sensor 609, the linear module 702 and the winding component 2 are all electrically connected to an external control device.

[0081] After printing on the tubing, it needs to be wound up. Since winding requires ensuring each layer of the tubing is wound in a spiral pattern, with each layer having a total of N turns before moving to the next layer, in this embodiment, the winding process is controlled by two mechanisms: firstly, the unwinding component 1 controls the rotation of the tubing reel; secondly, the linear module 702 controls the entire unwinding component 1 (and the tubing reel) to move slowly along the axis. The movement is reciprocating, with the stroke being the distance between the two inner surfaces of the tubing reel, denoted as L. The moving speed of the linear module 702 is L / N for every revolution of the tubing reel. In other words, for every revolution of the tubing reel, it moves axially to the position of the next revolution, thus ensuring it is completely flat.

[0082] Based on the above configuration, the scheme also includes a redundant control system. A pressure sensor 609 is installed on the adjusting block 603, and the signal acquisition part of the pressure sensor 609 contacts the limiting block 608. Since the above scheme utilizes the elastic force of the third spring 605 on the L-shaped plate 606 and acts on the hose through the pressure roller 607 to flatten the hose, under normal conditions, the pressure exerted by the limiting blocks 608 on both sides on the pressure sensor 609 is equal, with the pressure coming from the force of the third spring 605 on the L-shaped plate 606. However, when a mismatch occurs between the coil winding position and the traction position during the winding process, it will cause the hose to... The pressure of the compression roller 607 on one side increases, squeezing the third spring 605 on that side. This causes the limit block 608 to move via the pressure rod 604, thereby reducing the force on the pressure sensor 609. On the other side, due to the loss of compression, the pressure sensor 609 is further squeezed by the elastic force of the third spring 605, resulting in an increase in the pressure signal. The pressure signals on both sides show a situation where one side increases and the other side decreases. This indicates that there is a mismatch between traction and winding. By controlling the linear module 702 to increase or decrease the moving speed, an adaptive adjustment can be made until the pressure signals on both sides are equal.

[0083] The specific adjustment method is as follows: when the direction of the pressure reduction side is the same as the moving direction of the linear module 702, it is necessary to control and slow down the moving speed of the linear module 702; when the direction of the pressure reduction side is opposite to the moving direction of the linear module 702, it is necessary to control and increase the moving speed of the linear module 702. The former is because when the linear module 702 moves too fast, causing the same-side extrusion roller 607 to be squeezed, the signal detected by the pressure sensor 609 on that side will decrease, thus requiring a slowdown; the latter is because when the linear module 702 moves too slowly, causing the opposite-side extrusion roller 607 to be squeezed, the signal detected by the pressure sensor 609 on that side will increase, thus requiring an increase in speed.

[0084] Example 4

[0085] like Figure 6 and Figure 7 As shown, based on Embodiment 3, the present invention provides a technical solution: Preferably, a base 501 is fixedly connected to the table surface of the main body 9, an mounting ring 502 is rotatably connected to the inner side of the base 501, an internal gear ring 503 is fixedly connected to one side of the mounting ring 502, and a mounting rod 506 is fixedly connected through the mounting ring 502. The nozzle of the plasma surface processor 507 and the nozzle of the inkjet printer 508 are both fixedly mounted on the mounting rod 506. An adjusting motor 504 is fixedly mounted on the table surface of the main body 9, and a drive gear 505 is fixedly connected to the output end of the adjusting motor 504. The drive gear 505 meshes with the internal gear ring 503.

[0086] In the proposed solution, the output ends of the plasma surface processor 507 and the inkjet printer 508 are tilted to reduce scratches during the winding process. However, in actual production, the location of the tubing information in this configuration is offset relative to the axial direction. After the tubing is packaged, it is difficult to quickly read the printed area from the outside; reading may need to be done from the side of the tubing closer to the printing area. Figure 12 The printing position on the first tube on the left shown in the image can only be read by standing on the right side of the image, which is inconvenient for actual operation.

[0087] In this embodiment, by mounting the nozzle of the plasma surface processor 507 and the printhead of the inkjet printer 508 on the adjustable mounting rod 506, during the printing process when the winding component 2 is not in the outermost winding state, the control rod makes the nozzle of the plasma surface processor 507 and the printhead of the inkjet printer 508 form an angle of 30° to 60° with the ground, thus achieving the printing effect required by the scheme. When printing is done until only the last small section of the tube remains, this section of the tube is wound on the outermost layer of the winding component 2. Therefore, there is no friction from other tubes on the side away from the axis, but if the printing area is printed on this side, it greatly facilitates reading.

[0088] During operation, the control motor 504 drives the drive gear 505 to rotate, which in turn rotates the internal gear ring 503, causing the mounting ring 502 to rotate. This, in turn, rotates the mounting rod 506, thus adjusting the tilt angle of the plasma surface processor 507's nozzle and the inkjet printer 508's nozzle. Adjusting it to vertically downwards positions the outermost printing area of ​​the tube disc away from the axis, facilitating reading.

[0089] like Figure 1 , Figure 2 and Figure 3 As shown, preferably, multiple wheel seats are fixedly connected to the platform of the main body 9, and each wheel seat is rotatably connected to an auxiliary support wheel 10.

[0090] In this embodiment, the hose needs to travel a long path during the production process, which can easily cause the middle of the hose to sag or sway. Therefore, multiple sets of auxiliary support wheels 10 are additionally set on the hose traction path to provide auxiliary support for the hose and prevent printing misalignment caused by hose sag, thereby improving the printing effect.

[0091] like Figure 2 , Figure 4 and Figure 10 As shown, preferably, the side of the clamping block 411 with the arc surface is provided with a number of protrusions 416 parallel to the traction direction of the hose.

[0092] In this embodiment, by providing the protrusion 416, the gripping ability of the clamp 411 is improved, further reducing the deflection of the hose in the circumferential direction, thereby improving the stability of the processing.

[0093] This invention also provides a continuous automated printing process for the surface of automotive hoses, comprising the following steps:

[0094] S1: Unwinding and straightening: The hose is released through the unwinding component 1. The hose is guided by the straightening component 3 in sequence and conveyed in a straight line without circumferential twisting, releasing the internal curling stress and reducing the twisting deviation in subsequent processing.

[0095] Release the internal coiling stress of the hose to avoid periodic ripples caused by torsion and reduce positional deviations in subsequent processing.

[0096] S2: Positioning constraint: The hose enters the positioning component 4, and the positioning component 4 restricts the circumferential deflection of the hose without obstructing the axial conveying, ensuring that the processing and printing positions are consistent.

[0097] It provides stable support for plasma processing and printing, ensuring that the hose does not deflect circumferentially and that the plasma processing area and the printing area are precisely aligned.

[0098] S3: Plasma treatment and inkjet printing: The plasma surface processor 507 uses its nozzle to treat the surface of the tubing at an angle of 30° to 60° to the ground. Then, the inkjet printer 508 uses its nozzle to print text on the treated area at the same angle to ensure accurate printing position.

[0099] Plasma treatment enhances the surface free energy and ink adhesion of the hose; the tilted angle design places the printing position diagonally above the hose, leaving a gap for subsequent winding; the text proportions are adapted to the hose size, ensuring clear markings without affecting hose performance.

[0100] S4: Drying treatment: The rubber hose is dried by medium-low temperature hot air at 40-60℃ through the long air outlet of the hot air dryer, which accelerates the evaporation of ink solvent and the curing of resin, while weakening the intermolecular forces of rubber to delay rebound.

[0101] It accelerates the evaporation of solvents in ink and the cross-linking and curing of resin, thereby increasing the solidification speed of the marking; at the same time, it weakens the intermolecular forces of rubber, delays the rebound of the tubing, and provides conditions for subsequent extrusion deformation.

[0102] S5: Extrusion Deformation: After drying, the tubing is temporarily extruded into an oval shape through the extrusion structure 6 to prevent the printed area from rubbing against other tubing during winding.

[0103] Arrange the tubing along the short axis when winding it up to avoid direct friction between the printed area and other tubing, thus protecting the markings that are not fully cured.

[0104] S6: Rewinding adjustment: Rewinding component 2 rewinds the deformed hose, so that the hose is neatly arranged and wound on the reel.

[0105] Ensure the hoses are neatly arranged on the winding component to avoid overlapping or skewing; pressure feedback adjustment ensures that the winding speed matches the traction speed, reducing hose stretching or accumulation.

[0106] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A continuous automated printing device for automotive hose surfaces, comprising a main body (9), a plasma surface processor (507), an inkjet printer (508), and a drying component (8); characterized in that, Also includes: An unwinding component (1) is provided at the front of the main body (9) for releasing the hose; Straightening component (3) is used to straighten the unwound rubber tube; Positioning components (4) are set on both sides of the plasma surface processor (507) and the inkjet printer (508) to prevent the hose from deflecting in the circumferential direction during the traction process; The winding component (2) is located at the tail of the main body (9) and is used to wind up the printed rubber tube; The nozzle of the plasma surface processor (507) and the nozzle of the inkjet printer (508) are both at an angle of 30° to 60° to the ground. The height of the text printed on the rubber tube by the inkjet printer (508) is 8% to 16% of the outer circumference of the rubber tube. On the table of the main body (9) and behind the drying component (8), there is a compression structure (6). The compression structure (6) is used to temporarily compress and deform the hose. The long axis of the deformed hose is perpendicular to the axis of the winding component (2), and the short axis is parallel to the axis of the winding component (2). The drying component (8) is a hot air dryer, including a mounting base and a hot air gun fixedly connected to the top of the mounting base. The output part of the hot air gun is a long strip-shaped air outlet, which is used to provide strip-shaped hot air along the hose traction path.

2. The continuous automated printing device for the surface of automotive hoses according to claim 1, characterized in that: The extrusion structure (6) includes an adjusting seat (601) fixedly connected to the main body (9). Two screws (602) are symmetrically rotatably connected to the inner side of the adjusting seat (601). The two screws (602) are fixedly connected at their close ends. One end of one of the screws (602) extends to the outside of the adjusting seat (601) and is fixedly connected to a knob. Two adjusting blocks (603) are symmetrically threaded to the outside of the two screws (602). The adjusting blocks (603) are connected to the adjusting seat (601). The sliding connection is provided. The adjusting block (603) has a through hole, and the inner wall of the through hole is slidably connected to a pressure rod (604). The two pressure rods (604) are fixedly connected to an L-shaped plate (606) at their close ends and to a limit block (608) at their far ends. A third spring (605) is sleeved on the outside of the pressure rod (604) and between the adjusting block (603) and the L-shaped plate (606). The top of the L-shaped plate (606) is rotatably connected to a pressure roller (607).

3. The continuous automated printing device for the surface of automotive hoses according to claim 2, characterized in that: The positioning component (4) includes a positioning seat (401) fixedly connected to the table surface of the main body (9). A slide table (402) is slidably connected to the top of the positioning seat (401). A transmission box (403) is fixedly connected to the top of the slide table (402). Two first slide rods (404) are symmetrically fixedly connected between the inner walls of the transmission box (403). A first slider (405) is slidably connected to the outside of each of the first slide rods (404). A rack (408) is fixedly connected to the side of each of the two first sliders (405) that are close to each other. A central gear (407) is rotatably connected between the transmission box (403) and the slide table (402). The central gear (407) is meshed with both racks (408). A first spring (406) is sleeved on the outside of each of the first slide rods (404), and the two first springs (406) are centrally symmetrical. The transmission box (403) has a central spring (406) on its outer side. Two strip-shaped grooves (409) are centrally symmetrically provided. The top of the first slider (405) passes through the strip-shaped groove (409) and is fixedly connected to a clamping block (411). The clamping blocks (411) have concave arc surfaces on their adjacent sides, and the arc surfaces of the clamping blocks (411) are made of rubber. A cylinder (410) is fixedly installed on the top of the slide table (402). The piston rod of the cylinder (410) contacts the side of the first slider (405) away from the first spring (406). A sliding groove (412) is provided in the middle of the positioning seat (401). A second sliding rod (413) is fixedly connected between the inner walls of the sliding groove (412). A second slider (415) is slidably connected to the outside of the second sliding rod (413). The second slider (415) is fixedly connected to the slide table (402). A second spring (414) is sleeved on the outside of the second sliding rod (413).

4. The continuous automated printing device for the surface of automotive hoses according to claim 3, characterized in that: The straightening component (3) includes an upper guide frame (301). A first guide wheel (302) is provided on the side of the upper guide frame (301) near the unwinding component (1). The first guide wheel (302) is positioned above the unwinding component (1) and is arranged along the tangential direction of the unwinding reel on the unwinding component (1). The hose is vertically extended upwards and then passes around the first guide wheel (302). A traction ring (305) is fixedly connected to the side of the upper guide frame (301) near the first guide wheel (302). After the hose is released from the unwinding reel, it passes through the traction ring (305) towards the first guide wheel (302). The traction direction is vertically upward; the upper guide frame (301) column is provided with a second guide wheel (303) and a third guide wheel (304) on the side away from the first guide wheel (302). The second guide wheel (303) and the first guide wheel (302) are set at the same height. After the hose passes around the first guide wheel (302), it passes around the second guide wheel (303) and becomes vertically downward. The lower edge height of the third guide wheel (304) is consistent with the center height of the subsequent hose printing production line. After the hose passes around the second guide wheel (303), it passes around the third guide wheel (304) and becomes horizontal.

5. The continuous automated printing device for the surface of automotive hoses according to claim 4, characterized in that: The tail of the main body (9) is fixedly connected to a base (701), and a linear module (702) is fixedly installed on the top of the base (701). The movable end of the linear module (702) is fixedly connected to a carrier plate (703). The linear module (702) can control the carrier plate (703) to perform reciprocating linear motion. The winding component (2) is installed on the top of the carrier plate (703). A pressure sensor (609) is fixedly installed on one side of the adjusting block (603). The limiting block (608) is in contact with the signal acquisition part of the pressure sensor (609). The pressure sensor (609), the linear module (702) and the winding component (2) are all electrically connected to an external control device.

6. The continuous automated printing device for automotive hose surface according to claim 5, characterized in that: A base (501) is fixedly connected to the table surface of the main body (9). An installation ring (502) is rotatably connected to the inner side of the base (501). An internal gear ring (503) is fixedly connected to one side of the installation ring (502). An installation rod (506) is fixedly connected through the installation ring (502). The gun head of the plasma surface processor (507) and the nozzle of the inkjet printer (508) are both fixedly installed on the installation rod (506). An adjustment motor (504) is fixedly installed on the table surface of the main body (9). A drive gear (505) is fixedly connected to the output end of the adjustment motor (504). The drive gear (505) meshes with the internal gear ring (503).

7. The continuous automated printing device for automotive hose surface according to claim 6, characterized in that: Multiple wheel seats are fixedly connected to the platform of the main body (9), and each wheel seat is rotatably connected to an auxiliary support wheel (10).

8. The continuous automated printing device for the surface of automotive hoses according to claim 3, characterized in that: The clamping block (411) has several protrusions (416) on one side of the arc surface that are parallel to the traction direction of the hose.

9. A continuous automated printing process for the surface of automotive hoses, characterized in that: The continuous automated printing apparatus for the surface of automotive hoses according to any one of claims 1-8 comprises the following steps: S1: Unwinding and straightening: The hose is released by the unwinding component (1), and the hose is guided by the straightening component (3) in sequence. It is conveyed in a straight line without circumferential twisting, releasing the internal curling stress and reducing the twisting deviation in subsequent processing. S2: Positioning constraint: The hose enters the positioning component (4), and the positioning component (4) restricts the circumferential deflection of the hose and does not obstruct the axial conveying, ensuring that the processing and printing positions are consistent; S3: Plasma treatment and inkjet printing: The nozzle of the plasma surface processor (507) treats the surface of the tube at an angle of 30° to 60° with the ground, and then the nozzle of the inkjet printer (508) prints text in the treated area at the same angle to ensure accurate printing position; S4: Drying treatment: The rubber hose is dried by medium-low temperature hot air at 40-60℃ through the long air outlet of the hot air dryer, which accelerates the evaporation of ink solvent and the curing of resin, while weakening the intermolecular forces of rubber to delay rebound. S5: Extrusion Deformation: After drying, the tubing is temporarily extruded into an elliptical shape through the extrusion structure (6) to avoid friction between the printed area and other tubing during winding. S6: Rewinding adjustment: The rewinding component (2) rewinds the deformed hose so that the hose is neatly arranged and wound on the reel.

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