Spring tube automatic pad printing equipment and process

Abstract

The application discloses a spring tube automatic pad printing equipment and process, which comprises a rack, a slide rail arranged on the rack along the length direction of the rack, a feeding device fixedly installed on the rack and used for feeding the spring tube, a front end positioning mechanism fixedly installed on the rack and used for front end positioning of the spring tube, a fixed-length servo mechanism slidably installed on the slide rail and used for setting the printing position of the spring tube after the front end positioning, a flame treatment device fixedly installed on the rack and used for flame treatment of the surface of the spring tube held by the fixed-length servo mechanism during movement, and a code spraying device fixedly installed on the rack and used for marking and printing on the surface of the spring tube which is treated by the flame treatment device and held by the fixed-length servo mechanism to the printing position.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a spring tube automatic pad printing device and process. BACKGROUND

[0002] When performing an examination or surgical treatment, it is often necessary to send endoscopes, hemostatic forceps, biopsy forceps and other medical devices into the digestive tract, blood vessels, urethra and other cavities, and medical spring tubes are one of the most important accessories for conveying endoscopes, hemostatic forceps, biopsy forceps and other medical devices.

[0003] In gastroscopy accessory medical devices, a large number of spring tube hoses are needed for force transmission protection, and medical spring tubes generally include metal springs and plastic outer skins wrapped around the metal springs. Since the spring tube needs to be connected to the end part of the medical device at both ends, a large number of fixed length markings and stripping of the plastic layer process are required, i.e. the spring tube is first marked and printed, and then the skinning process is performed, and the outer skin of the end part of the spring tube is removed according to the marked printed points.

[0004] The length of the marking needs to be set in advance, and a length measuring tool is usually used to measure the position of the marking required by the spring tube, which has low precision and a relatively complicated process, and is not suitable for large quantities of spring tube skinning.

[0005] Currently, in the process of marking the spring tube, manual handling and tool printing are usually used: manual handling to a separate printing device for marking and printing, which not only affects the firmness of the printed marking in terms of timeliness, but also is more susceptible to external environment and personnel operation to affect the processing effect of printing.

[0006] In addition, whether in the process of traditional marking and printing or in the existing automatic pad printing device, since the length of the spring tube varies each time, the end position cannot be kept consistent by manual operation, and the position clamped by the clamp varies each time, if direct marking and printing are performed, problems such as inconsistent length of the spring tube printing position, asymmetric printing marking, and large and small marking intervals may occur, which affects the subsequent stripping of the plastic layer process. SUMMARY

[0007] To solve the above technical problems, the technical solutions of the present application are as follows:

[0008] The application provides a spring tube automatic pad printing equipment for realizing integrated operation of flame treatment and mark printing on the outer surface of a spring tube. The front end positioning mechanism comprises a fixed plate installed on the rack, a slide rail assembly installed on the fixed plate, a positioning baffle slidably arranged on the fixed plate through the slide rail assembly and having a final position, and a sensing assembly installed on the fixed plate and used for sensing the position of the movement of the positioning baffle.

[0009] Further, the spring tube automatic pad printing equipment provided by the application further has the following characteristics.

[0010] Further, the spring tube automatic pad printing equipment provided by the application further has the following characteristics.

[0011] Further, the spring tube automatic pad printing equipment provided by the application further has the following characteristics.

[0012] Further, the spring tube automatic pad printing equipment provided by the application also has the following characteristics, the fixed-length servo mechanism comprises: a fixed-length servo motor installed at one end of the slide rail close to the feeding device, used to drive the fixed-length servo mechanism to work; a fixed-length servo fixed frame slidably installed on the slide rail; a fixed-length clamp jaw used to clamp the spring tube; a fixed-length up-down air cylinder installed on the fixed-length servo fixed frame; a finger air cylinder installed on the fixed-length up-down air cylinder and connected to the fixed-length clamp jaw, the finger air cylinder drives the fixed-length clamp jaw to clamp the spring tube, and the fixed-length up-down air cylinder drives the fixed-length clamp jaw to move up and down; and a fixed-length telescopic air cylinder connected to the finger air cylinder, used to drive the fixed-length clamp jaw to stretch out and retract.

[0013] Further, the spring tube automatic pad printing equipment provided by the application also has the following characteristics, the feeding device further comprises: a zero-reset induction sheet fixed on the linear module mechanism, used to detect the position of the positioning clamp jaw; and a power-off switch fixed on the linear module mechanism; when the positioning clamp jaw drives the spring tube to move to the positioning baffle and completes the front-end positioning, the fixed-length servo mechanism is started, the positioning stepper motor is reset to zero, the zero-reset induction sheet triggers the power-off switch, and the positioning clamp jaw stops running.

[0014] Further, the spring tube automatic pad printing equipment provided by the application also has the following characteristics, the code spraying device comprises: a bottom plate fixed on the rack; a printing lower die installed on the bottom plate, wherein the printing lower die is provided with a processing space through which the fixed-length servo mechanism passes through the printing lower die to feed the spring tube along the direction of the rack; and at least one pair of code sprayers installed on both sides of the printing lower die along the length direction of the printing lower die, used to mark and print the spring tube pulled tight on the printing lower die.

[0015] Further, the spring tube automatic pad printing equipment provided by the application also has the following characteristics, the printing lower die is used to place the spring tube to be printed and compress and straighten the two ends of the spring tube; wherein the printing lower die comprises a first printing seat and a second printing seat corresponding to each other, a through hole is formed between the first printing seat and the second printing seat, forming a channel for the spring tube to pass through and be placed, the inner diameter of the end portions of the two ends of the channel is larger than the inner diameter of the middle portion of the channel, and the inner walls of the two end portions of the channel are respectively provided with inclined stepped landslide structures.

[0016] Further, the spring tube automatic pad printing equipment provided by the application also has the following characteristics, the flame treatment device comprises a flame spraying gun, the flame spraying gun is fixed on the rack, when the fixed-length servo mechanism stretches out the fixed-length clamp jaw to clamp the spring tube and moves to the flame treatment device, the flame spraying gun automatically sprays flame, and the flame spraying of the flame spraying gun is controlled by the movement of the fixed-length servo mechanism.

[0017] The application further provides a spring tube automatic pad printing process, which is suitable for the spring tube automatic pad printing device and comprises at least the following steps.

[0018] Step one: grabbing feeding and front end positioning: the spring tube to be processed is sent to the rack through the feeding device, when the spring tube collides with the front end positioning mechanism, the feeding device stops feeding but keeps grabbing the spring tube, and the front end positioning mechanism starts to work to keep the front end of the spring tube aligned on the positioning surface of the positioning baffle;

[0019] Step two: flame treatment: when the front end positioning is completed, the fixed-length servo mechanism grabs the spring tube after the front end positioning, at this time, the feeding device releases the spring tube, and the fixed-length servo mechanism is ready to set the length of the printing position; when the fixed-length servo mechanism clamps the spring tube through the flame treatment device, the surface of the spring tube is treated by flame;

[0020] Step three: printing position length setting: when the fixed-length servo mechanism clamps the spring tube after the flame treatment through the upper part of the printing lower die and reaches the printing setting position, the fixed-length servo mechanism sends the spring tube into the printing lower die once, at this time, the fixed-length servo mechanism stops clamping the spring tube;

[0021] Step four: printing treatment: the code spraying device performs marking printing on the spring tube in the printing lower die;

[0022] Step five: discharging: steps two, three and four are repeated until two or three marking is completed, the code spraying device stops working, and the fixed-length servo mechanism clamps the spring tube after the code spraying to discharge.

[0023] The technical scheme has the following advantages:

[0024] The spring tube automatic pad printing device and process provided by the application have the following advantages: the device has the integration of the feeding device, the front end positioning mechanism, the fixed-length servo mechanism, the flame treatment device and the code spraying device; when used, the front end positioning mechanism is used to position the front end of the feeding spring tube, then the fixed-length servo mechanism is used to set the length of the automatic printing position of the spring tube after the front end positioning, the flame surface treatment device is used to spray the spring tube surface, when the set position is reached, the fixed-length servo mechanism sends the spring tube after the front end positioning to the printing lower die in the code spraying device to be straightened, pressed and fixed before printing.

[0025] Compared with the existing marking printing process, the device integrates flame surface treatment and printing marking, ensures the accurate and stable spring tube marking printing position and the consistent marking interval after printing through the front positioning mechanism and the fixed length servo mechanism in each spring tube feeding process, ensures the firm and uniform printing marking in combination with the flame treatment, and does not need to rely on manual carrying and measuring, reduces the back and forth transportation of the plastic coated spring tube, influences the marking effect, and ensures the firmness of the printed marking point. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0027] Figure 1 It is a structural schematic view of the spring tube automatic pad printing equipment in the embodiment of the present application.

[0028] Figure 2 It is a top view of the spring tube automatic pad printing equipment in the embodiment of the present application.

[0029] Figure 3 It is a structural schematic view of the grabbing and feeding mechanism in the embodiment of the present application.

[0030] Figure 4 It is a structural schematic view of the front positioning mechanism in the embodiment of the present application.

[0031] Figure 5 It is a structural schematic view of the fixed length servo mechanism in the embodiment of the present application.

[0032] Figure 6 It is a partial structural schematic view of the fixed length servo mechanism in the embodiment of the present application.

[0033] Figure 7 It is a structural schematic view of the code spraying device in the embodiment of the present application.

[0034] Figure 8 It is a structural schematic view of the printing lower die in the embodiment of the present application.

[0035] Figure 9 It is a top view of the printing lower die in the embodiment of the present application.

[0036] Explanation of reference signs:

[0037] 1, spring tube; 10, rack; 20, feeding device; 30, front positioning mechanism; 40, fixed length servo mechanism; 50, flame treatment device; 60, code spraying device.

[0038] 21, positioning clamping jaw; 22, air cylinder; 23, positioning stepper motor; 24, screw rod; 25, first mounting block; 26, zero reset induction sheet; 27, power-off switch; 28, second mounting block; 29, height limiting arm; 31, fixed plate; 32, sliding block guide rail; 33, sliding block; 34, sliding block fixing block; 35, positioning baffle; 36, induction sheet; 37, photoelectric sensor; 38, spring fixing block; 41, fixed length up-down air cylinder; 42, fixed length telescopic air cylinder; 43, finger air cylinder; 44, fixed length clamping jaw; 45, fixed length servo motor fixing frame; 46, fixed length servo motor; 47, synchronous belt; 51, flame spraying gun; 61, base plate; 62, inkjet printer; 63, printing lower mold; 631, first printing seat; 632, second printing seat. DETAILED DESCRIPTION

[0039] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0040] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] The "proximal end" and "distal end" involved in the embodiments of the present application can represent the direction, the side facing the operator is the "proximal end", and the side facing the treatment into the human body is the "distal end"; "proximal end" and "distal end" can also represent the part structure and end part located in the corresponding direction.

[0043] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. Example 1:

[0044] This embodiment proposes an automatic transfer printing device for spring tubes, which integrates flame treatment and marking printing on the outer surface of spring tubes. The aforementioned spring tubes are used to transport instruments into cavities such as the digestive tract, blood vessels, and urethra, thereby enabling medical operations to be performed at predetermined sites. They are one of the most important accessories for transporting medical instruments such as endoscopes, hemostatic forceps, and biopsy forceps.

[0045] Figure 1 A schematic diagram of the structure of an automatic spring tube pad printing device according to an embodiment of the present invention is shown. Figure 1 As shown, the automatic pad printing equipment for spring tubes includes a frame 10, a feeding device 20, a front-end positioning mechanism 30, a fixed-length servo mechanism 40, a flame treatment device 50, and a coding device 60.

[0046] The frame 10 is shaped like a cuboid, with a slide rail along its length on one side. A feeding device 20, fixedly mounted on the frame 10 on the other side of the slide rail, is used to feed the spring tubes. A front-end positioning mechanism 30, fixedly mounted on the frame 10, is used to position the front end of the fed spring tubes. A length-fixed servo mechanism 40, slidably mounted on the slide rail, is used to set the printing position of the spring tubes after front-end positioning. A flame treatment device 50, fixedly mounted on the frame 10, is generally located downstream of the feeding device 20 and is used to flame-treat the surface of the spring tubes held by the length-fixed servo mechanism 40 during movement. A coding device 60, fixedly mounted on the frame 10, is generally located downstream of the flame treatment device 50.

[0047] In actual operation, this equipment is equipped with a control center, which can be set up near the rack 10, and a control panel is set on the rack 10. The control panel has operation keys such as start button and stop button, which are used to control the above-mentioned device to work.

[0048] In addition, such as Figure 1 As shown, a height limiting arm 29 can be installed at the front of the feeding device 20. When the spring tube enters the feeding device 20, the upper surface of the height limiting arm 29 contacts the lower surface of the spring tube, limiting the height position of the spring tube during the feeding process. This ensures that the spring tube maintains the correct posture when entering the feeding device 20, preventing bending, skewing, and sagging due to its own weight from affecting subsequent processing steps. The height of the height limiting arm 29 can be adjusted by an adjustment device to maintain the same horizontal plane as the height at which the feeding device 20 grips the spring tube, preventing instability in length caused by the tube's own weight sagging.

[0049] In the following description of directions, "front" and "back" refer to the length of the frame 10, "left" and "right" refer to the width of the frame 10, and "up" and "down" refer to the height of the frame 10.

[0050] In this embodiment, a slide rail is provided on the frame 10, and a fixed-length servo mechanism 40 is slidably mounted on the slide rail. The fixed-length servo motor 46 in the fixed-length servo mechanism 40 is fixed to one end of the slide rail. During processing, the fixed-length servo mechanism 40 slides back and forth along the slide rail under the control of the fixed-length servo motor 46. On the right side of one end of the slide rail, a portion of the frame 10 is provided for mounting the feeding device 20, the front-end positioning mechanism 30, the flame treatment device 50, and the inkjet printing device 60. Figure 2 This is a top view of the automatic spring tube pad printing device according to an embodiment of the present invention. Figure 1 , Figure 2 As shown, the feeding device 20, the flame treatment device 50, and the coding device 60 are sequentially distributed in the frame 10. The front positioning mechanism 30 can be set on the left side of the feeding device 20 along the width direction of the frame 10, that is, at the position between the initial position of the fixed length servo mechanism 40 and the feeding device 20. The above devices complete the automatic transfer printing process of the spring tube under the cooperation of the fixed length servo mechanism 40. Finally, the fixed length servo mechanism 40 controls the spring tube to be fed along the slide rail.

[0051] Figure 3 This is a schematic diagram of the gripping and feeding mechanism in an embodiment of the present invention. Figure 1 As shown, the feeding device 20 is located on the side of the frame 10 near the loading area, specifically fixed to the rear end of the frame 10 by the second mounting block 28. The feeding device 20 includes a gripping feeding mechanism and a placement slot (not shown in the figure). The spring tube is placed in the placement slot for loading. Figure 2 As shown, the gripping and feeding mechanism has a positioning gripper 21 and a linear module mechanism. The positioning gripper 21 can open and close and is fixed on the linear module mechanism to realize the reciprocating motion of the positioning gripper 21 along the length direction of the frame 10.

[0052] The linear module mechanism includes a cylinder 22, a positioning stepper motor 23, and a lead screw 24. One end of the lead screw 24 is mounted on the frame 10, and the other end is mounted on the positioning stepper motor 23. The positioning stepper motor 23 drives the lead screw 24, causing the positioning gripper 21 to move axially along the lead screw 24, i.e., to move back and forth relative to the frame 10. One end of the cylinder 22 is mounted on the lead screw 24 via a first mounting block 25, and the other end is fixedly connected to the positioning gripper 21. The cylinder 22 is used to drive the positioning gripper 21 to clamp or release the spring tube. In this embodiment, the cylinder 22 can be a large-diameter cylinder.

[0053] The zero return sensing sheet 26 is fixed on the screw rod 24, and is used to detect the position of the positioning clamping jaw 211 during the rotation of the screw rod 24. The power-off switch 27 is fixed on one end close to the positioning stepping motor 23. The positioning clamping jaw 21 is clamped to hold the material by using the large-diameter cylinder 22, the positioning stepping motor 23 rotates to drive the screw rod 24 to move the positioning clamping jaw 21 forward, when the positioning clamping jaw 21 drives the spring tube to move to the front end positioning mechanism 30 and completes the front end positioning, the fixed length servo mechanism 40 starts to clamp the spring tube, the positioning stepping motor 23 returns to zero, the zero return sensing sheet 26 triggers the power-off switch 27, the zero return sensing sheet 26 collides with the power-off switch 27, and the positioning clamping jaw 21 stops running.

[0054] Specifically, in this process, when the zero return sensing sheet 26 detects that the positioning clamping jaw 21 reaches the preset zero return position, the power-off switch 27 is triggered, after the power-off switch 27 is triggered, the power supply or related signals of the positioning stepping motor 23 are cut off, so that the positioning clamping jaw 21 stops running. The positioning clamping jaw 21 can be set to return to the initial position.

[0055] Figure 4 The structure diagram of the front end positioning mechanism 30 in the embodiment of the application is shown. In each feeding process of the spring tube, the end position of the spring tube in each feeding process is not consistent, which causes the position of the clamping jaw to be different during the grabbing process. It is relatively difficult to solve the problem of keeping the length and position of the spring tube consistent in each feeding process by manual operation, and meanwhile, the subsequent fixed length servo mechanism 40 for setting the printing position is affected. Therefore, the front end positioning mechanism 30 is arranged.

[0056] As shown in Figure 4 The front end positioning mechanism 30 includes a fixed plate 31, a sliding rail assembly, a positioning baffle 35 and a sensing assembly. The fixed plate 31 is installed on the rack 10. The sliding rail assembly is installed on the fixed plate 31. The positioning baffle 35 is slidably arranged on the fixed plate 31 through the sliding rail assembly and has a final position. The sensing assembly is installed on the fixed plate 31 and is used to sense the position of the positioning baffle 35.

[0057] When the end of the spring tube driven by the feeding device 20 touches and pushes the positioning baffle 35 to reach the final position, the sensing assembly is triggered to stop the action of the positioning baffle 35, and the end of the spring tube is constrained to be aligned on the positioning surface of the positioning baffle 35, so that the front end positioning of the spring tube is realized. The moving stroke of the spring tube driven by the feeding device 20 covers the forward and backward moving strokes of the positioning baffle 35.

[0058] The moving stroke of the spring tube refers to the distance traveled by the end of the spring tube during the process of being pushed from the initial position to the front end positioning mechanism 30. This stroke is the entire movement from when the end of the spring tube is gripped by the feeding device 20 to the end of the spring tube finally reaching the "final position" of the positioning baffle 35 of the front end positioning mechanism 30. The forward and backward moving stroke of the positioning baffle 35 refers to the total distance that the positioning baffle 35 can slide on the slide rail assembly, i.e. the entire movement range from the initial position (the most front or the most back) of the positioning baffle 35 to its "final position". The moving stroke range of the feeding device 20 must be long enough and cover the forward and backward moving stroke of the positioning baffle 35 to ensure that the end of the spring tube can contact the positioning baffle 35 and that the positioning baffle 35 can be pushed to the "final position" regardless of the initial position of the end of the spring tube.

[0059] Assuming that the forward and backward moving stroke of the positioning baffle 35 is from position A to position B (where B is the "final position"), the initial position of the end of the spring tube can be at position C (close to the positioning baffle) or position D (far from the positioning baffle).

[0060] If the end of the spring tube is at position C, the moving stroke of the feeding device 20 needs to be from C to B. If the end of the spring tube is at position D, the moving stroke of the feeding device 20 needs to be from D to B. Regardless of the initial position of the end of the spring tube, the moving stroke of the feeding device 20 must cover the entire distance from C to B or from D to B to ensure that the positioning baffle can be pushed to the "final position" B.

[0061] In the spring tube automatic pad printing device of the present application, the "final position" is a specific position within the slidable stroke range of the positioning baffle on the slide rail assembly. When the end of the spring tube reaches the positioning baffle through the feeding device 20 and pushes the positioning baffle to move, the positioning baffle slides back and forth along the slide rail assembly until the end of the spring tube reaches a predetermined and fixed stopping position, which is the "final position".

[0062] The "final position" is determined by the sensing assembly. When the positioning baffle reaches this position, the sensing assembly is triggered, causing the positioning baffle to stop moving further. At this time, the end of the spring tube is constrained to align on the positioning surface of the positioning baffle, achieving the front end positioning of the spring tube. This "final position" ensures that the end of the spring tube is accurately aligned at the same position every time it is fed, providing a stable reference for subsequent printing operations, regardless of the initial position of the end of the spring tube.

[0063] The setting of the "final position" is based on the size of the spring tube and the requirements of the printing process to ensure the positioning accuracy and consistency of the spring tube in subsequent printing processes.

[0064] In the embodiment, the slide rail assembly comprises a slide rail 32, a slide block 33, and a slide block fixing block 34; and the induction assembly comprises an induction sheet and a photoelectric sensor 37. The fixed plate 31 is installed on the rack 10; the slide rail 32 is fixedly arranged on the fixed plate 31; the slide block 33 is arranged on the slide rail and is in sliding cooperation with the slide rail 32; the slide block fixing block 34 is connected with the slide block 33 so as to slide on the slide rail 32 together with the slide block 33; the positioning baffle 35 is connected with the slide block fixing block 34 so as to move back and forth along the length direction of the rack 10 under the guidance of the slide block 33. The induction sheet can be arranged below / sideward the slide block fixing block 34; and the photoelectric sensor 37 is fixed on the fixed plate 31 and is arranged correspondingly with the induction sheet.

[0065] When the spring tube end is clamped by the positioning clamping jaw 21 to reach the front end positioning mechanism 30 and push the positioning baffle 35, the positioning baffle 35 drives the slide block 33 to move to the direction of the induction sheet until the induction sheet triggers the photoelectric sensor 37, and then the positioning baffle 35 stops moving, the spring tube end is constrained to be aligned in the same plane, and the front end positioning of the spring tube is realized.

[0066] In the embodiment, the front end positioning mechanism 30 can further comprise a spring (not shown in the figure) and a spring fixing block 38, one end of the spring is fixed to the positioning baffle 35, and the other end is fixed to the spring fixing block 38, which is used for returning the slide block 33 to the initial position by the spring when the front end positioning is completed. The reciprocating movement of the positioning baffle 35 can also be driven by a pneumatic cylinder. The positioning baffle 35 constrains the spring tube end by the positioning surface thereof, so as to align the spring tube end and realize the front end positioning. In order to meet different process requirements or optimize the equipment structure, the positioning baffle 35 can be designed into other components with similar functions, such as a rod-shaped structure.

[0067] The specific way of realizing the feeding and front end positioning of the spring tube by the feeding device 20 is as follows:

[0068] The positioning clamping jaw 21 in the grabbing feeding mechanism can reciprocate under the action of the lead screw 24, so as to realize repeated feeding. When the positioning clamping jaw 21 drives the spring tube to reach the positioning baffle of the front end positioning mechanism 30, the action stops, and the positioning clamping jaw 21 no longer reciprocates along the lead screw 24. The spring tube pushes the positioning baffle, and gives the positioning baffle a force along the length direction of the rack 10, and the positioning baffle drives the slide block 33 to move to the direction of the induction sheet 36 until the induction sheet 36 triggers the photoelectric sensor 37, and then the positioning baffle stops moving, the spring tube end is constrained to be aligned on the positioning surface of the positioning baffle, so as to realize the front end positioning of the spring tube. The positioning baffle can move back and forth on the slide rail 32, and the back and forth movement of the positioning baffle can meet the requirement of ensuring the front end positioning of the spring tube. The front end positioning is to ensure that the position length of the mark printing meets the technical requirement of the product, and the situation that the position length is not the same does not occur.

[0069] Figure 5 Structure diagram of the fixed-length servo mechanism 40 in the embodiment of the present application. Figure 6 Structure diagram of the fixed-length servo mechanism 40 in the embodiment of the present application. As shown in Figure 5 and Figure 6 The fixed-length servo mechanism 40 includes a fixed-length servo motor 46, a fixed-length servo fixed frame 45, a fixed-length clamping jaw 44, a fixed-length up-and-down cylinder 41, a finger cylinder 43, and a fixed-length telescopic cylinder 42. As shown in Figure 1 The fixed-length servo mechanism 40 is installed on the left side of the feeding device 20, the flame treatment device 50, and the code spraying device 60.

[0070] Specifically, the fixed-length servo motor 46 is fixedly installed at one end of the slide rail close to the feeding device 20, and is used to drive the fixed-length servo mechanism 40 to work; the fixed-length servo fixed frame 45 is slidably installed on the slide rail; the fixed-length up-and-down cylinder 41 is installed on the fixed-length servo fixed frame 45; the finger cylinder 43 is installed on the fixed-length up-and-down cylinder 41 and is connected to the fixed-length clamping jaw 44, the finger cylinder 43 drives the fixed-length clamping jaw 44 to clamp the spring tube, and the fixed-length up-and-down cylinder 41 drives the fixed-length clamping jaw 44 to move up and down; the fixed-length telescopic cylinder 42 is connected to the finger cylinder 43, and is used to drive the fixed-length clamping jaw 44 to telescopically extend leftward and rightward.

[0071] The specific manner in which the fixed-length servo mechanism 40 sets the printing position of the spring tube is as follows:

[0072] When the front-end positioning is completed, the fixed-length servo mechanism 40 clamps the spring tube positioned in place, and performs printing position setting through the fixed-length servo motor 46. First, when the front-end positioning of the spring tube is completed, the fixed-length servo mechanism 40 is started to work, the fixed-length up-and-down cylinder 41 is lowered to a position, the fixed-length telescopic cylinder 42 is extended, the finger cylinder 43 is closed and drives the fixed-length clamping jaw 44 to clamp the spring tube, and the positioning clamping jaw 21 is released after the fixed-length clamping jaw 44 clamps the spring tube, at which time the positioning stepper motor 23 is reset. Then, the fixed-length up-and-down cylinder 41 is raised to a position, and the fixed-length servo motor 46 starts to rotate, driving the fixed-length servo mechanism 40 to move forward through the synchronous belt 47.

[0073] In addition, in the automatic spring tube pad printing equipment, as shown in Figure 1 It can be seen that the flame treatment device 50 includes a flame spraying gun 51 fixed on the frame 10, when the fixed-length servo mechanism 40 extends the fixed-length clamping jaw 44 to clamp the spring tube and moves to the flame treatment device 50, the flame spraying gun 51 automatically sprays flame, the spraying of the flame spraying gun 51 is controlled by the movement of the fixed-length servo mechanism 40, that is, the fixed-length servo mechanism 40 moves forward on the slide rail for a certain distance, the flame spraying gun 51 sprays flame until the fixed-length servo mechanism 40 stops moving, through the spraying of the flame on the surface of the spring tube, the surface tension of the spring tube is improved, and the marking point printing is firm.

[0074] Figure 7 This is a schematic diagram of the inkjet printing device 60 in an embodiment of the present invention. Figure 7 As shown, the marking device 60 includes: a base plate 61, a printing die 63, and at least one pair of inkjet printers 62. The marking device 60 is located at the front of the flame treatment device 50. The base plate 61 is fixed to the frame 10; the printing die 63 is mounted on the base plate 61, and the printing die 63 has a coaxial processing space through which the fixed-length servo mechanism 40 feeds the spring tube along the direction of the frame 10 when passing through the printing die 63. At least one pair of inkjet printers 62 are mounted on both sides of the printing die 63 along its length direction, and are used to mark the spring tubes stretched within the printing die 63. The inkjet printers 62 are equipped with a row of high-precision printheads, which can print successfully in one pass, marking one row on each side, achieving a clear and uniform printing effect, and meeting the printing needs of spring tubes of different specifications.

[0075] Figure 8 This is a schematic diagram of the printing lower mold 63 in an embodiment of the present invention. Figure 8 As shown, specifically, the printing lower mold 63 is used to place the spring tube to be printed and to press and straighten both ends of the spring tube. The printing lower mold 63 includes a first printing seat 631 and a second printing seat 632, which are corresponding to each other. A through hole is formed between the first printing seat 631 and the second printing seat 632, creating a channel for the spring tube to pass through. The inner diameter of both ends of the channel is larger than the inner diameter of the middle part of the channel, and inclined stepped slope structures are respectively provided on the inner walls of the channel at both ends. The slope structures extend inclinedly from the larger inner diameter at the ends to the smaller inner diameter in the middle part, guiding the spring tube smoothly into and stably positioning it within the through space. Pressing and straightening both ends of the spring tube ensures the stability of the printing position during the printing process.

[0076] Furthermore, the connection between the landslide structure and the middle part of the channel can be made into a smooth arc surface. To enhance the clamping effect, the upper surface of the first printing seat can be made to protrude more than the lower surface.

[0077] When the fixed-length servo fixing frame 45 in the fixed-length servo mechanism 40 moves to the set printing position, the fixed-length upper and lower cylinder 41 descends into place, and the finger cylinder 43 drives the fixed-length gripper 44 to clamp the spring tube and send it into the printing lower mold 63.

[0078] The spring tube printing process of the automatic pad printing equipment for spring tubes proposed in this embodiment includes the following steps:

[0079] Step 1: Grabbing, feeding, and front-end positioning:

[0080] The spring tube to be processed is sent to the rack 10 by the grabbing feeding mechanism, when the spring tube hits the front end positioning mechanism 30, the grabbing feeding mechanism stops feeding but keeps grabbing the spring tube, and the front end positioning mechanism 30 starts to work to keep the front end of the spring tube in the same position.

[0081] Specifically, the spring tube to be processed is placed on the placing groove of the grabbing feeding mechanism, the positioning clamping jaw 21 clamps the spring tube, and moves forward under the action of the positioning stepping motor 23 along the screw rod 24, and is sent to the front end positioning mechanism 30 on the rack 10 under the driving of the linear module mechanism. When the end of the spring tube hits the positioning baffle of the front end positioning mechanism 30, the grabbing feeding mechanism stops feeding but keeps grabbing the spring tube. The front end positioning mechanism 30 starts to work, and the positioning baffle drives the sliding block 33 to reciprocate under the pushing of the spring tube to the inductive sheet 36. When reaching the final position set by the positioning baffle, the inductive sheet 36 triggers the photoelectric sensor 37, and the positioning baffle stops working, the end of the spring tube is constrained and aligned on the positioning surface of the positioning baffle, and the front end positioning of the spring tube is realized.

[0082] Step two, flame treatment:

[0083] After the front end positioning is completed, the fixed length clamping jaw 44 of the fixed length servo mechanism is stretched out under the driving of the fixed length servo motor 46 to grab the spring tube after the front end positioning, at this time the positioning clamping jaw 21 in the grabbing feeding mechanism releases the spring tube, and the fixed length servo mechanism 40 is ready to set the length of the printing position; when the fixed length servo mechanism 40 clamps the spring tube passes through the flame treatment device 50, the flame gun 51 automatically sprays fire to perform flame treatment on the surface of the spring tube. During the flame treatment process, the moving speed of the fixed length servo mechanism 40 and the spraying time of the flame gun 51 can be accurately controlled according to the material of the spring tube and the printing requirement, so as to ensure that the surface of the spring tube can be uniformly heated and improve the printing adhesion.

[0084] Step three: length setting of printing position:

[0085] After the flame treatment, the spring tube is clamped by the fixed length clamping jaw 44 of the fixed length servo mechanism 40 and continues to move to above the printing lower die 63. The fixed length servo mechanism 40 sends the spring tube into the printing lower die 63 at one time according to the set length of the printing position through the collaborative action of the fixed length telescopic cylinder 42 and the fixed length up-down cylinder 41. When the spring tube reaches the set position of printing, the fixed length servo mechanism 40 stops clamping the spring tube, and the spring tube is pressed and straightened by the first printing seat 631 and the second printing seat 632 of the printing lower die 63, and is ready for printing treatment.

[0086] Step four, printing treatment:

[0087] The code printing device 60 performs marking printing on the spring tube in the printing lower die 63. Specifically, the code printer 62 of the code printing device 60 starts to perform marking printing on the spring tube in the printing lower die 63 after receiving a printing instruction. During the printing process, the first printing seat 631 and the second printing seat 632 of the printing lower die 63 continue to press and straighten the spring tube, so as to ensure the stability of the spring tube during the printing process and improve the printing quality.

[0088] Step five, discharging:

[0089] After the code printing device 60 completes a section of marking printing, the fixed-length servo mechanism 40 repeats steps two, three and four according to the set program until two sections of marking or three sections of marking are completed, the code printing device 60 stops working, the fixed-length servo mechanism 40 clamps the spring tube with completed marking, takes it out of the printing lower die 63, and performs discharging operation. Specifically, after the marking point completes printing, the finger cylinder 43 is closed to drive the fixed-length clamping jaw 44 to clamp the spring tube, and then the fixed-length servo motor 4626 in the fixed-length servo mechanism 40 pulls the tube to the front end of the rack 10 for discharging. After the discharging is completed, the equipment returns to the initial state and is ready for the next pad printing operation of the spring tube.

[0090] The front end positioning mechanism 30 is arranged in the embodiment to realize consistent end position of the spring tube during each feeding, and through cooperation with the grabbing feeding mechanism and the fixed-length servo mechanism 40, the problems of inconsistent printing position length of the spring tube, asymmetric marking, and large or small marking interval are solved.

[0091] The whole pad printing process is completed by the automatic equipment, and the automatic operation of the whole process is realized from grabbing feeding, front end positioning, flame treatment, printing position setting to printing treatment and discharging, so that the production efficiency is greatly improved and the labor cost is reduced. The automatic and high-precision marking printing of the spring tube is realized by optimizing the equipment structure and process flow in the embodiment, the production efficiency and the printing quality are improved, and the embodiment has a wide application prospect. Embodiment two:

[0092] The embodiment is different from the above-mentioned embodiment one in that at least two grabbing feeding mechanisms are arranged, and the two grabbing feeding mechanisms are arranged side by side in the height direction of the rack 10. Or at least two positioning clamping jaws 21 are arranged on the same grabbing feeding mechanism, and the positioning clamping jaws 21 are arranged staggered.

[0093] The front end positioning mechanism 30 is changed from fixed arrangement to sliding arrangement, so that the positioning baffle of the front end positioning mechanism 30 slides on the rack 10 to position the end of the spring tube. A lengthened positioning baffle can also be used to position the ends of multiple spring tubes at a time.

[0094] Although the embodiment 2 can also solve the problem of inconsistent length position of the loading end of the spring tube and can realize loading of multiple spring tubes at one time, although the front end positioning problem is solved, the subsequent printing device and the like also need to increase the structure, which is bound to be more complex in structure, and thus the embodiment is relatively complex in structure and operation steps compared with the embodiment 1.

[0095] Obviously, the above embodiments are only examples for clearly illustrating the present application and are not intended to limit the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. All the embodiments do not need to be exhausted here. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A spring tube automatic pad printing apparatus for marking printing on a surface of a spring tube, characterized by, The application relates to a spring pipe marking device. The device comprises a rack provided with a slide rail along the length direction of the rack; a feeding device fixedly installed on the rack and used for feeding the spring pipe; a front end positioning mechanism fixedly installed on the rack and used for positioning the front end of the spring pipe; a fixed length servo mechanism slidably installed on the slide rail and used for setting the printing position of the spring pipe after the front end of the spring pipe is positioned; a flame treatment device fixedly installed on the rack and used for treating the surface of the spring pipe clamped by the fixed length servo mechanism during movement; and a code spraying device fixedly installed on the rack and used for marking and printing the surface of the spring pipe treated by the flame treatment device and clamped by the fixed length servo mechanism to the printing position. The front end positioning mechanism comprises a fixed plate installed on the rack, a slide rail assembly installed on the fixed plate, a positioning baffle slidably arranged on the fixed plate through the slide rail assembly and provided with a final position, and an induction assembly installed on the fixed plate and used for sensing the position of the movement of the positioning baffle. When the end of the spring pipe driven by the feeding device touches and pushes the positioning baffle to the final position, the induction assembly is triggered to stop the movement of the positioning baffle, the end of the spring pipe is aligned on the positioning surface of the positioning baffle, the front end of the spring pipe is positioned, and the movement stroke of the spring pipe driven by the feeding device covers the forward and backward movement stroke of the positioning baffle. The front end positioning mechanism further comprises a spring and a spring fixing block, one end of the spring is fixed to the positioning baffle, and the other end of the spring is fixed to the spring fixing block, so that when the front end positioning is completed, the slide rail assembly returns to the initial position through the spring. The feeding device comprises a grabbing feeding mechanism provided with a positioning clamp jaw and a linear module mechanism, and the positioning clamp jaw is fixed to the linear module mechanism to realize the reciprocating movement of the positioning clamp jaw. The linear module mechanism comprises a cylinder, one end of the cylinder is installed on a lead screw through a first mounting block, and the other end of the cylinder is fixedly connected to the positioning clamp jaw, the cylinder is used to drive the positioning clamp jaw to clamp or release the spring pipe, and the lead screw is installed on the rack, a positioning stepper motor is installed on the other end of the lead screw, and the positioning stepper motor drives the lead screw to drive the positioning clamp jaw to move along the axial direction of the lead screw. The fixed length servo mechanism comprises a fixed length servo motor installed on one end of the slide rail close to the feeding device and used to drive the fixed length servo mechanism to work, a fixed length servo fixing frame slidably installed on the slide rail, a fixed length up-down cylinder installed on the fixed length servo fixing frame, a fixed length clamp jaw used to clamp the spring pipe, a finger cylinder installed on the fixed length up-down cylinder and connected to the fixed length clamp jaw, the fixed length up-down cylinder drives the fixed length clamp jaw to move up and down, a fixed length telescopic cylinder connected to the finger cylinder and used to drive the fixed length clamp jaw to telescopically move forward and backward. The feeding device further comprises a zero reset induction sheet fixed on the linear module mechanism and used to detect the position of the positioning clamp jaw, and a power-off switch fixed on the linear module mechanism. ​ ​ ​ ​ 2. The spring tube automatic pad printing apparatus according to claim 1, characterized by ​ 3. The spring tube automatic pad printing apparatus according to claim 1, characterized by ​ 4. The spring tube automatic pad printing apparatus according to claim 3, characterized by ​ ​ ​ ​ 5. The spring tube automatic pad printing apparatus according to claim 1, characterized by ​ ​ ​ ​ ​ ​ ​ 6. The spring tube automatic pad printing apparatus according to claim 4, characterized by ​ ​ ​ When the positioning jaw moves the spring tube to the positioning baffle and completes the front end positioning, the fixed-length servo mechanism is started, the positioning stepper motor is returned to zero, the return-to-zero inductive sheet triggers the power-off switch, and the positioning jaw stops running.

7. The spring tube automatic pad printing apparatus according to claim 1, characterized by The ink-jet device comprises: a bottom plate fixed on the rack; a printing lower mold installed on the bottom plate, wherein the printing lower mold is provided with a processing space through which the fixed-length servo mechanism passes to send the spring tube along the direction of the rack; at least one pair of ink-jet machines installed on both sides of the printing lower mold along the length direction thereof, used for marking and printing the spring tube stretched on the printing lower mold.

8. The spring tube automatic pad printing apparatus according to claim 7, characterized by The printing lower mold is used for placing the spring tube to be printed and compressing and straightening the two ends of the spring tube; wherein the printing lower mold comprises a first printing seat and a second printing seat corresponding to each other, a through hole is formed between the first printing seat and the second printing seat, forming a channel for the spring tube to pass through, the inner diameter of the two end portions of the channel is larger than the inner diameter of the middle portion of the channel, and an inclined stepped landslide structure is arranged on the inner wall of each of the two end portions of the channel.

9. The spring tube automatic pad printing apparatus according to claim 5, characterized by The flame treatment device comprises a flame spray gun fixed on the rack, which automatically sprays flame when the fixed-length servo mechanism stretches the fixed-length jaw to clamp the spring tube and moves to the flame treatment device, and the flame spraying of the flame spray gun is controlled by the movement of the fixed-length servo mechanism.

10. A spring tube automatic pad printing process characterized by, The spring tube automatic pad printing equipment is suitable for any one of claims 1-9, and at least comprises the following steps: Step one, grabbing feeding and front end positioning: The spring tube to be processed is sent to the rack by the feeding device, when the spring tube collides with the front end positioning mechanism, the feeding device no longer continues to feed but keeps the grabbing state of the spring tube, and the front end positioning mechanism starts to work to keep the front end of the spring tube aligned on the positioning surface of the positioning baffle; Step two, flame treatment: After the front end positioning is completed, the fixed-length servo mechanism grabs the spring tube after the front end positioning, at this time the feeding device releases the spring tube, and the fixed-length servo mechanism prepares to set the length of the printing position; when the fixed-length servo mechanism clamps the spring tube passing through the flame treatment device, the surface of the spring tube is treated by flame; Step three: length setting of printing position: When the fixed-length servo mechanism clamps the spring tube treated by flame passing above the printing lower mold and reaches the set printing position, the fixed-length servo mechanism sends the spring tube into the printing lower mold once, at this time the fixed-length servo mechanism stops clamping the spring tube; Step four, printing treatment: The ink-jet device performs marking and printing on the spring tube in the printing lower mold; Step five, discharging: Repeat steps two, three and four until two or three marking is completed, the ink-jet device stops working, and the fixed-length servo mechanism clamps the spring tube after ink-jet ends to discharge.

Images