Printing machine steel mesh cleaning and jacking control structure

Abstract

The utility model relates to the technical field of printing steel mesh cleaning, in particular to a jacking control structure for printing machine steel mesh cleaning. The device comprises a cleaning mechanism and a jacking mechanism, the jacking mechanism comprises a cleaning mounting seat, a jacking mounting seat, a lifting connection block, a motor, at least two synchronous wheels and a transmission belt, the motor is connected to the jacking mounting seat, the synchronous wheels are vertically arranged and mounted on the jacking mounting seat, the output end of the motor is connected with the synchronous wheels, and the transmission belt is connected to the synchronous wheels in a sleeving mode. One end of the lifting connection block is fixed to the transmission belt, the other end of the lifting connection block is fixed to the cleaning installation base, and the cleaning mechanism is installed on the cleaning installation base. According to the structure, motor driving is adopted to replace an existing air cylinder, the motor can accurately control the height of cleaned paper and adjust the height to the best Z-direction height for wiping the steel mesh, the best cleaning contact face is maintained in the printing process of the printing machine, and therefore the printing quality of the printing machine is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of printing stencil cleaning technology, and in particular to a stencil cleaning lifting control structure for printing presses. Background Technology

[0002] Solder paste printers are indispensable machines in the SMT industry. Their function is to apply a layer of solder paste to the pads on circuit boards, enabling the boards to proceed to the next soldering step. Stencil cleaning is a crucial part of solder paste printing. During the printing process, solder paste residue from the previous print run inevitably remains in the stencil's mesh. With each print run, the amount of residual solder paste increases, necessitating stencil cleaning after a certain number of runs. Stencil cleanliness, as a core parameter affecting print quality, directly impacts printing accuracy and soldering quality. Current printers use cylinder-controlled Z-axis movement for stencil cleaning, which drives a paper roll to the bottom of the stencil to wipe it with cleaning paper.

[0003] The existing stencil cleaning mechanism uses a cylinder to lift the cleaning connecting plate and move the cleaning paper to the bottom of the stencil for wiping and cleaning. Because the cylinder lifting scheme adopts a fixed stroke design, the Z-axis positioning accuracy can only rely on mechanical structure adjustment, which is difficult to adapt to the installation of printing machines of different specifications. At the same time, the cleaning mechanism may have Z-axis height differences due to the precision of machine assembly.

[0004] Existing cylinder lifting methods typically raise the cleaning paper to 2.3mm above the lower contact surface of the stencil. The stencil cleaning relies on this 2.3mm gap to cause elastic deformation, and the friction generated by the deformation of the stencil is used to clean and remove solder paste residue. However, the fixed stroke may not be suitable for the stencil cleaning needs of different printing press models, and it cannot achieve dynamic compensation of cleaning pressure, which can easily cause repeated deformation damage to the stencil. Utility Model Content

[0005] This invention provides a stencil cleaning and lifting control structure for printing presses, aiming to solve the problem of uncontrollable cleaning height during printing when using a cylinder lifting scheme.

[0006] This utility model provides a stencil cleaning and lifting control structure for a printing press, including a cleaning mechanism and a lifting mechanism. The lifting mechanism includes a cleaning mounting base, a lifting mounting base, a lifting connecting block, a motor, a synchronous pulley, and a transmission belt. The motor is connected to the lifting mounting base. At least two synchronous pulleys are arranged vertically and mounted on the lifting mounting base. The output end of the motor is connected to the synchronous pulleys. The transmission belt is sleeved on the synchronous pulleys. One end of the lifting connecting block is fixed to the transmission belt, and the other end of the lifting connecting block is fixed to the cleaning mounting base. The cleaning mechanism is mounted on the cleaning mounting base.

[0007] As a further improvement of this utility model, one end of the lifting connecting block is provided with a clamping plate, which clamps the transmission belt.

[0008] As a further improvement of this utility model, the synchronous pulley is a gear structure, the inner side of the transmission belt is provided with a rack, the clamping plate is provided with a locking tooth, the rack of the transmission belt is connected to the gear structure of the synchronous pulley, and the locking tooth of the clamping plate is connected to the rack of the transmission belt.

[0009] As a further improvement of this utility model, the lifting mechanism includes a photoelectric sensor and a sensing plate. The sensing plate is connected to the lifting connecting block. Photoelectric sensors are provided at both the upper and lower ends of the lifting mounting base. When the lifting connecting block moves to the position of the photoelectric sensor, the sensing plate senses the photoelectric sensor.

[0010] As a further improvement of this utility model, the motor is a stepper motor.

[0011] As a further improvement of this utility model, the cleaning mechanism includes a cleaning support plate, a paper roll shaft, a paper roll motor, a paper guide shaft, and a wiping strip. The cleaning support plate is connected to the cleaning mounting base, the paper roll shaft is movably connected to the cleaning support plate, the paper roll motor is connected to the cleaning support plate, the output end of the paper roll motor is connected to the paper roll shaft, the paper guide shaft is connected to the cleaning support plate, the wiping strip is connected to the paper guide shaft, the cleaning paper is mounted on the paper roll shaft, and the cleaning paper passes around the paper guide shaft and is placed on the wiping strip.

[0012] As a further improvement of this utility model, the paper roll shaft includes a paper roll drive shaft and a paper jamming shaft. The paper roll drive shaft is movably connected to a cleaning support plate at one end of the cleaning mounting base, and the paper jamming shaft is movably connected to a cleaning support plate at the other end of the cleaning mounting base. The paper roll drive shaft is connected to the output end of the paper roll motor.

[0013] As a further improvement of this utility model, the cleaning mechanism also includes an alcohol spray head, which is connected to the cleaning mounting base and is aligned with the cleaning paper at the wiping strip position.

[0014] The beneficial effects of this utility model are: by using a motor drive instead of the existing cylinder, the motor can precisely control the height of the paper being cleaned and adjust it to the optimal Z-axis height for wiping the steel mesh, support parameter compensation during the printing process, maintain the optimal cleaning contact surface during the printing process, and thus ensure the printing quality of the printing machine. Attached Figure Description

[0015] Figure 1 This is an overall structural diagram of the printing press steel mesh cleaning and lifting control structure of this utility model;

[0016] Figure 2 This is a structural diagram of the lifting mechanism in this utility model. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0018] like Figures 1 to 2 As shown, this utility model aims to solve the stroke problem of the cleaning mechanism 1. Each solder paste printer may require a different Z-axis height for the cleaning mechanism 1 due to assembly issues and model differences. The motor 6 can precisely control the lifting of the 19 sheets of cleaning paper, adjusting it to the optimal Z-axis height for wiping the stencil, thus solving the problem of uncontrollable cleaning height during printing.

[0019] Specifically, the present invention provides a printing press stencil cleaning and lifting control structure, comprising a cleaning mechanism 1 and a lifting mechanism 2. The lifting mechanism 2 includes a cleaning mounting base 3, a lifting mounting base 4, a lifting connecting block 5, a motor 6, a synchronous pulley 7, and a transmission belt 8. The motor 6 is connected to the lifting mounting base 4. At least two synchronous pulleys 7 are arranged vertically and installed on the lifting mounting base 4. The output end of the motor 6 is connected to the synchronous pulley 7. The transmission belt 8 is sleeved on the synchronous pulley 7. One end of the lifting connecting block 5 is fixed to the transmission belt 8, and the other end of the lifting connecting block 5 is fixed to the cleaning mounting base 3. The cleaning mechanism 1 is installed on the cleaning mounting base 3.

[0020] Since the synchronous pulley 7 is vertically arranged on the lifting mounting base 4, after the transmission belt 8 is connected to the synchronous pulley 7, under the drive of the motor 6, the transmission belt 8 tends to move up and down, thereby driving the lifting connecting block 5 and the cleaning mechanism 1 to move up and down synchronously. The motor 6 is a stepper motor 6. Using a stepper motor 6 can ensure the accuracy of the drive. Using the motor 6 to drive instead of the cylinder drive can accurately control the lifting of 19 sheets of cleaning paper, ensuring the printing quality of the printing press. This structure allows for cleaning height adjustment during printing press operation, avoiding frequent structural modifications.

[0021] One end of the lifting connecting block 5 is equipped with a clamping plate 9, which clamps the transmission belt 8. Through the fixing structure between the clamping plate 9 and the transmission belt 8, the lifting connecting block 5 can move up and down with the transmission belt 8, thereby driving the entire cleaning mechanism 1 to complete fine-tuning lifting.

[0022] The synchronous pulley 7 has a gear structure, the inner side of the transmission belt 8 has a rack, and the clamping plate 9 has retaining teeth. The rack of the transmission belt 8 engages with the gear structure of the synchronous pulley 7, and the retaining teeth of the clamping plate 9 engage with the rack of the transmission belt 8. The meshing of the toothed structure between the transmission belt 8 and the synchronous pulley 7 ensures a tighter fit and prevents slippage. Furthermore, the clamping plate 9, through the cooperation of the retaining teeth and the rack, securely fixes itself, preventing slippage and thus avoiding errors in lifting and lowering.

[0023] The lifting mechanism 2 includes a photoelectric sensor 10 and a sensing plate 11. The sensing plate 11 is connected to the lifting connecting block 5. Photoelectric sensors 10 are installed at both the upper and lower ends of the lifting mounting base 4. When the lifting connecting block 5 moves to the position of the photoelectric sensor 10, the sensing plate 11 senses the photoelectric sensor 10. By installing photoelectric sensors 10 at two designated positions on the upper and lower ends of the lifting mounting base 4, when the sensing plate 11 moves to the position of the photoelectric sensor 10, signal feedback causes the stepper motor 6 to pause its drive, ensuring the vertical movement of the lifting connecting block 5.

[0024] The cleaning mechanism 1 includes a cleaning support plate 12, a paper roll shaft, a paper roll motor 13, a paper guide shaft 14, and a wiping strip 15. The cleaning support plate 12 is connected to the cleaning mounting base 3. The paper roll shaft is movably connected to the cleaning support plate 12. The paper roll motor 13 is connected to the cleaning support plate 12, and its output end is connected to the paper roll shaft. The paper guide shaft 14 is connected to the cleaning support plate 12. The wiping strip 15 is connected to the paper guide shaft 14. The cleaning paper 19 is mounted on the paper roll shaft, and it passes around the paper guide shaft 14 and is placed on the wiping strip 15. The wiping strip 15 is made of P-type steel. Driven by the lifting mechanism 2, the entire cleaning mechanism 1 moves up and down slightly with the cleaning mounting base 3 to adapt to the stencil cleaning height requirements of different printing press models. A paper roll shaft is installed on each side of the cleaning mechanism 1. The core of the cleaning paper 19 is mounted on the paper roll shaft. The paper roll motor 13 drives the core to rotate through the paper roll shaft. The cleaning paper 19 is released from the core of one paper roll shaft and recycled to the core of the other paper roll shaft. The guide shaft 14 is located between the two paper roll shafts. During the transmission process, the cleaning paper 19 passes through the guide shaft 14 and is placed on the wiping strip 15. When cleaning the steel mesh, it is wiped by the cleaning paper 19 above the wiping strip 15.

[0025] The paper roll shaft includes a paper roll drive shaft 16 and a paper jamming shaft 17. The paper roll drive shaft 16 is movably connected to a cleaning support plate 12 at one end of the cleaning mounting base 3, and the paper jamming shaft 17 is movably connected to a cleaning support plate 12 at the other end of the cleaning mounting base 3. The paper roll drive shaft 16 is connected to the output end of the paper roll motor 13. The cleaning paper 19 is wound on the core, and the structure that divides the paper roll shaft into the paper roll drive shaft 16 and the paper jamming shaft 17 at both ends facilitates the insertion of both ends of the core into the paper roll drive shaft 16 and the paper jamming shaft 17, respectively.

[0026] The cleaning mechanism 1 also includes an alcohol spray nozzle 18, which is connected to the cleaning mounting base 3 and is aligned with the cleaning paper 19 at the position of the wiping strip 15. Before the cleaning paper 19 wipes the steel mesh through the wiping strip 15, the alcohol spray nozzle 18 wets the cleaning paper 19 at that position to ensure the cleaning paper 19 effectively wipes the steel mesh.

[0027] The cleaning paper 19 is wound around the core at both ends, and passes under the guide shaft 14 in the middle and is placed on the acetal wiping strip 15. During the cleaning of the stencil, it is wiped by the cleaning paper 19 above the acetal wiping strip 15. The core of the cleaning paper 19 is fixed on the left and right cleaning support plates 12 by the paper roll drive shaft 16 and the paper clamping shaft 17, and can rotate. When driven by the stepper motor 6, the paper roll drive shaft 16 can drive the core of the cleaning paper 19 to rotate, thereby continuously replacing the surface of the cleaning paper 19 for stencil cleaning during the cleaning process.

[0028] The complete cleaning process is as follows: First, before cleaning the steel mesh, alcohol is sprayed through the alcohol nozzle 18 to moisten the cleaning paper 19. Then, as the cleaning mechanism 1 moves to the bottom of the steel mesh, the forward and reverse rotation of the stepper motor 6 drives the synchronous pulley to rotate. The synchronous pulley and transmission belt convert the rotational motion of the motor 6 into a vertical lifting motion, causing the cleaning mounting base 3 to rise and fall vertically. The left and right connecting cleaning support plates 12 of the cleaning mounting base 3 drive the acetal wiping strip 15 to rise, thereby cleaning the steel mesh.

[0029] This cleaning and lifting system combines precise mechanical transmission with intelligent control to achieve accurate adjustment of the cleaning height of the steel mesh. The cleaning mounting base 3 is equipped with a belt drive mechanism, the core of which is that the forward and reverse rotation of the stepper motor 6 drives the synchronous pulley to rotate. The synchronous pulley and transmission belt 8 convert the rotational motion of the motor 6 into a vertical lifting action. The cleaning mounting base 3 is connected to the transmission belt 8 via a lifting connecting block 5. Compared with traditional cylinder lifting solutions, this design has significant advantages. When the stepper motor 6 starts driving the synchronous pulley 7 to rotate, the cleaning mounting base 3 can lift the connecting plate of the cleaning mechanism 1, thereby controlling the lifting height of the cleaning mechanism 1. Simultaneously, the lifting mounting base 4 is equipped with a high-precision photoelectric sensor 10 to monitor the lifting stroke and form a closed-loop feedback, effectively ensuring the motion positioning accuracy and operational safety of the cleaning mechanism 1, preventing damage to the steel mesh due to excessive lifting height, and fundamentally solving the risk of steel mesh deformation damage caused by Z-axis positioning inaccuracy.

[0030] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A stencil cleaning and lifting control structure for a printing press, characterized in that, The device includes a cleaning mechanism and a lifting mechanism. The lifting mechanism includes a cleaning mounting base, a lifting mounting base, a lifting connecting block, a motor, a synchronous pulley, and a transmission belt. The motor is connected to the lifting mounting base. At least two synchronous pulleys are arranged vertically on the lifting mounting base. The output end of the motor is connected to the synchronous pulleys. The transmission belt is sleeved on the synchronous pulleys. One end of the lifting connecting block is fixed to the transmission belt, and the other end of the lifting connecting block is fixed to the cleaning mounting base. The cleaning mechanism is mounted on the cleaning mounting base.

2. The printing press stencil cleaning and lifting control structure according to claim 1, characterized in that, One end of the lifting connecting block is provided with a clamping plate, which clamps the transmission belt.

3. The printing press stencil cleaning and lifting control structure according to claim 2, characterized in that, The synchronous pulley has a gear structure, the inner side of the transmission belt is provided with a rack, the clamping plate is provided with a retaining tooth, the rack of the transmission belt is connected to the gear structure of the synchronous pulley, and the retaining tooth of the clamping plate is connected to the rack of the transmission belt.

4. The printing press stencil cleaning and lifting control structure according to claim 1, characterized in that, The lifting mechanism includes a photoelectric sensor and a sensing plate. The sensing plate is connected to the lifting connecting block. Photoelectric sensors are provided at both the upper and lower ends of the lifting mounting base. When the lifting connecting block moves to the position of the photoelectric sensor, the sensing plate and the photoelectric sensor are sensed.

5. The printing press stencil cleaning and lifting control structure according to claim 1, characterized in that, The motor is a stepper motor.

6. The printing press stencil cleaning and lifting control structure according to claim 1, characterized in that, The cleaning mechanism includes a cleaning support plate, a paper roll shaft, a paper roll motor, a paper guide shaft, and a wiping strip. The cleaning support plate is connected to the cleaning mounting base. The paper roll shaft is movably connected to the cleaning support plate. The paper roll motor is connected to the cleaning support plate, and its output end is connected to the paper roll shaft. The paper guide shaft is connected to the cleaning support plate, and the wiping strip is connected to the paper guide shaft. The cleaning paper is loaded on the paper roll shaft and passes around the paper guide shaft and is placed on the wiping strip.

7. The printing press stencil cleaning and lifting control structure according to claim 6, characterized in that, The paper roll shaft includes a paper roll drive shaft and a paper jamming shaft. The paper roll drive shaft is movably connected to a cleaning support plate at one end of the cleaning mounting base, and the paper jamming shaft is movably connected to a cleaning support plate at the other end of the cleaning mounting base. The paper roll drive shaft is connected to the output end of the paper roll motor.

8. The printing press stencil cleaning and lifting control structure according to claim 1, characterized in that, The cleaning mechanism also includes an alcohol nozzle, which is connected to the cleaning mounting base and is aligned with the cleaning paper at the wiping strip position.

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