Fabric conveying device of digital printing machine

Abstract

The utility model provides a fabric conveying device of a digital printing machine, which relates to the technical field of fabric conveying and comprises a base, a dust removal mechanism is arranged above the base and comprises a dust cover, the lower end of the dust cover is fixedly connected with the upper end of the base, and symmetrically distributed through grooves are formed in two sides of the dust cover. By means of the dust removal mechanism, a high-pressure nozzle of the dust removal mechanism obliquely blows air through a bent pipe, dust and impurities of fabric are accurately stripped, the dust removal mechanism is matched with the dust suction hopper, an air bellow and a filter screen, floating dust is rapidly collected and filtered, secondary pollution is avoided, an exhaust fan accelerates airflow circulation, the dust removal efficiency is improved, and the dust removal efficiency is improved. A servo electric cylinder in the leveling mechanism drives a movable elastic compression roller to adapt to fabrics with different thicknesses, a pressure sensor monitors extrusion force in real time, it is guaranteed that dust removal is convenient when the fabrics are conveyed in a tight mode, damage to the fabrics is avoided, and therefore the effect of improving the fabric printing quality is achieved.

Description

Technical Field

[0001] This utility model relates to the field of fabric conveying technology, and in particular to a fabric conveying device for a digital printing machine. Background Technology

[0002] Digital printing is printing using digital technology. Digital printing technology is a high-tech product that integrates mechanical, computer, and electronic information technology, which has gradually formed with the continuous development of computer technology. The emergence and continuous improvement of this technology has brought a brand-new concept to the textile printing and dyeing industry. When the fabric is transported in existing digital printing machines, there will be some dust and lint, which will affect the subsequent printing quality.

[0003] For example, a digital printing machine fabric conveying device disclosed in Chinese patent literature (announcement number: CN115806210A) cleans the fabric during the fabric transportation process through a cleaning device, so that the cleaning roller cleans the upper and lower surfaces of the fabric to prevent the fabric from easily coming into contact with dust in the air or dust on the ground and getting the fabric dirty. Before winding into rolls, it saves a lot of manpower that is needed to manually clean the loose fibers and dust.

[0004] However, when the dust above the fabric is subjected to the rotation of the cleaning roller, although the cleaning roller can remove some dust and lint, these removed impurities can only be dispersed by their own gravity and simple mechanical rotation. Under the influence of airflow disturbance in the workshop environment and the airflow driven by the rotation of the cleaning roller, the dispersed dust will form a secondary suspension above the fabric, and some impurities will re-attach to the fabric surface. As a result, in the subsequent printing process, these residual impurities will affect the uniformity of ink adhesion, causing spots and color differences in the printed pattern, thus affecting the printing quality. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as the incomplete removal of dust and impurities from fabrics by cleaning rollers, which can easily lead to secondary contamination of the fabric by suspended dust and affect the quality of subsequent printing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A fabric conveying device for a digital printing machine includes a base, and a dust removal mechanism is provided above the base;

[0008] The dust removal mechanism includes a dust cover, the lower end of which is fixedly connected to the upper end of the base. Symmetrically distributed through slots are provided on both sides of the dust cover. A dust suction hopper is fixedly connected to the rear inner wall of the dust cover. A symmetrically distributed connecting pipe is fixedly connected to the back of the dust suction hopper. One end of each of the two connecting pipes passes through the dust cover and is fixedly connected to a bellows.

[0009] A flattening mechanism is provided above the base.

[0010] Preferably, the front of the bellows is fixedly connected to the back of the dust cover, a sealing frame is movably inserted into the back of the bellows, and a filter screen is fixedly sleeved on the inner wall of the sealing frame.

[0011] Preferably, an exhaust fan is fixedly installed at the lower end of the air box, and symmetrically distributed guide blocks are fixedly connected to the front inner wall of the dust cover, with a diversion pipe fixedly connected to the opposite surfaces of the two guide blocks.

[0012] Preferably, a high-pressure air pipe is fixedly connected to the outside of the diverter pipe, one end of the high-pressure air pipe penetrates and extends to the front of the dust cover, and two opposing surfaces of the guide blocks are fixedly connected to curved pipes arranged in a linear array, with a high-pressure nozzle fixedly installed at one end of the curved pipe.

[0013] Preferably, the leveling mechanism includes a fixed frame, the lower end of which is fixedly connected to the upper end of the base. The inner walls of both sides of the fixed frame are provided with symmetrically distributed sliding grooves. Guide sliders are slidably connected to the inner walls of the sliding grooves, and movable seats are fixedly connected to the opposing surfaces of the two guide sliders.

[0014] Preferably, movable elastic pressure rollers are rotatably connected to the inner walls of both sides of the movable seat via bearings, and symmetrically distributed limiting rods are fixedly connected to the upper end of the movable seat. One end of each of the two limiting rods passes through and extends to the top of the fixed frame. Adjusting plates are slidably sleeved on the outside of each of the two limiting rods, and symmetrically distributed support springs are fixedly connected to the lower end of the adjusting plates.

[0015] Preferably, one end of each of the two support springs is fixedly connected to the upper end of the movable seat, a servo electric cylinder is fixedly installed on the upper end of the fixed frame, one end of the piston rod of the servo electric cylinder passes through the fixed frame and is fixedly installed with a pressure sensor, the lower end of the pressure sensor is fixedly installed to the upper end of the adjusting plate, fixed elastic pressure rollers are rotatably connected to the inner walls of both sides of the fixed frame through bearings, a guide roller is provided above the base, and an inspection door is provided on the front of the dust cover.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] In this invention, a dust removal mechanism uses a high-pressure nozzle that blows air at an angle through a curved pipe to precisely remove dust and impurities from the fabric. Combined with a dust collection bucket, air box, and filter, it quickly collects and filters scattered dust, preventing secondary pollution. The exhaust fan accelerates airflow circulation, improving dust removal efficiency. Furthermore, the servo electric cylinder in the flattening mechanism drives the movement of the elastic pressure roller, adapting to fabrics of different thicknesses. A pressure sensor monitors the squeezing pressure in real time, ensuring that the fabric is taut during transport, facilitating dust removal while avoiding damage to the fabric, thereby improving the quality of fabric printing. Attached Figure Description

[0018] Figure 1 A schematic diagram of the main structure of a fabric conveying device for a digital printing machine provided by this utility model;

[0019] Figure 2 A three-dimensional structural view of a dust cover for a fabric conveying device of a digital printing machine provided by this utility model;

[0020] Figure 3 A perspective view of the adjusting plate structure of a fabric conveying device for a digital printing machine provided by this utility model;

[0021] Figure 4 A three-dimensional view of a high-pressure nozzle structure for a fabric conveying device of a digital printing machine provided by this utility model;

[0022] Figure 5 An exploded view of the bellows structure of a fabric conveying device for a digital printing machine provided by this utility model.

[0023] Legend: 1. Base; 2. Dust cover; 21. Through groove; 22. Dust suction hopper; 23. Connecting pipe; 24. Air box; 25. Sealing frame; 26. Filter screen; 27. Exhaust fan; 28. Guide block; 29. ​​Diverter pipe; 210. High-pressure air pipe; 211. Bend; 212. High-pressure nozzle; 3. Fixing frame; 31. Slide groove; 32. Guide slider; 33. Movable seat; 34. Movable elastic pressure roller; 35. Limiting rod; 36. Adjusting plate; 37. Support spring; 38. Servo electric cylinder; 39. Pressure sensor; 310. Fixed elastic pressure roller; 311. Guide roller; 4. Inspection door. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model are given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Example

[0028] like Figure 1-5 As shown, this utility model provides a technical solution: a fabric conveying device for a digital printing machine, including a base 1, which serves as a supporting foundation and provides stable support for the dust removal mechanism and the flattening mechanism above. The dust cover 2 of the dust removal mechanism is fixed at the lower end to the base 1 to form a closed space to prevent dust from overflowing during dust removal. The symmetrical through grooves 21 on both sides are the fabric inlet and outlet channels.

[0029] The dust hopper 22 on the inner wall of the dust cover 2 has a wide-mouth design to increase the dust adsorption area; the symmetrical connecting pipe 23 connected to the back connects the dust hopper 22 and the air box 24 to form a dust conveying channel, which efficiently guides the dust to the air box 24 with the help of airflow negative pressure.

[0030] The front of the bellows 24 is fixed to the back of the dust cover 2 to ensure a stable airflow path. The sealing frame 25, which is movably inserted at the back, is easy to install and remove quickly. The filter 26, which is fixed to the inner wall, is made of high-density fiber and can effectively intercept dust and lint. Clean air is discharged through the exhaust fan 27 to achieve air-dust separation and avoid secondary pollution.

[0031] The exhaust fan 27 is installed at the lower end of the air box 24. When working, it creates a continuous negative pressure inside the dust cover 2, which accelerates the airflow circulation and causes dust to quickly gather in the dust collection hopper 22, thereby improving the dust removal efficiency.

[0032] The symmetrical guide blocks 28 on the inner front wall of the dust cover 2 can guide the high-pressure airflow to the distribution pipe 29. The distribution pipe 29, which is connected between the guide blocks 28, evenly distributes the compressed air input from the high-pressure air pipe 210.

[0033] The high-pressure air pipe 210 outside the diversion pipe 29 passes through the front of the dust cover 2 and is connected to an external air compressor for air supply. The curved pipes 211 linearly arrayed on the surface of the guide block 28 are tilted at an angle of 30°-45°, so that the airflow ejected from the high-pressure nozzle 212 impacts the fabric at an angle, and uses the kinetic energy of the airflow to accurately remove dust and lint.

[0034] The fixing frame 3 of the leveling mechanism is fixed at the lower end to the base 1, providing an installation frame for the leveling component. The symmetrical sliding grooves 31 on both inner walls, together with the guide slider 32, constrain the lifting trajectory of the movable seat 33, ensuring the smooth movement of the movable elastic pressure roller 34.

[0035] The movable elastic pressure roller 34 inside the movable seat 33 is rotatably connected to the seat body through a bearing. The outer side is wrapped with an elastic silicone layer, which not only ensures the fit of the fabric but also avoids scratches. The upper end symmetrical limit rod 35 passes through the fixed frame 3 and slides into the adjusting plate 36 to limit the lifting range of the movable seat 33 and prevent deviation.

[0036] The symmetrical support springs 37 at the lower end of the adjusting plate 36 provide a buffer for the moving elastic pressure roller 34 to avoid sudden pressure changes that could damage the fabric. The servo electric cylinder 38 at the upper end of the fixed frame 3 can precisely drive the adjusting plate 36 to rise and fall, adapting to fabrics of different thicknesses.

[0037] The pressure sensor 39 at the piston rod end of the servo electric cylinder 38 collects the squeezing pressure of the pressure roller in real time and feeds it back to the control terminal to form a closed-loop control, ensuring the tightness of the fabric, which is beneficial for dust removal and protects the fabric.

[0038] The fixed elastic pressure roller 310 inside the fixed frame 3 works in conjunction with the movable elastic pressure roller 34 to pull the fabric using elastic friction. The guide roller 311 above the base 1 assists in the turning and conveying of the fabric. The inspection door 4 on the front of the dust cover 2 facilitates regular cleaning and maintenance of the internal components, such as cleaning the high-pressure nozzle and replacing the filter.

[0039] The working process of this utility model:

[0040] Step 1: Based on the thickness of the fabric to be printed, pre-adjust the stroke of the servo electric cylinder 38. Set the initial parameters through the control terminal. The control terminal is an existing mature technology, so it will not be described in detail. Drive the movable elastic pressure roller 34 along the slide groove 31 of the fixed frame 3. With the help of the guide slider 32, initially adjust the position to leave a suitable gap for the fabric to pass through. The operator manually and slowly inserts one end of the fabric between the fixed elastic pressure roller 310 and the movable elastic pressure roller 34. Utilize the elastic material of the pressure roller and the flexibility of the silicone layer to gently conform to the fabric and avoid scratching. Continue to pull the fabric through the through groove 21 on one side of the dust cover 2 so that the fabric enters the interior space of the dust cover 2 smoothly. Control the direction of the fabric and guide it to pass between the upper and lower sets of high-pressure nozzles 212. Utilize the layout of the guide block 28 and the diverter pipe 29 inside the dust cover 2 to guide the fabric to be in the coverage area of ​​the inclined air blowing of the high-pressure nozzles 212 to ensure the comprehensiveness of subsequent dust removal. Then pull the fabric through the through groove 21 on the other side of the dust cover 2. After contacting the surface of the guide roller 311, continue to convey it.

[0041] Step 2: Start the servo electric cylinder 38, extend its piston rod, and push the adjusting plate 36 down. The adjusting plate 36 transmits pressure through the support spring 37, which drives the moving elastic pressure roller 34 to descend smoothly along the slide 31, gradually reducing the distance between it and the fixed elastic pressure roller 310. The pressure sensor 39 collects the extrusion pressure data in real time and feeds it back to the control terminal to form a closed-loop control. When the pressure value reaches the corresponding fabric adaptation threshold, the servo electric cylinder 38 stops moving, so that the fabric is held in a stable and taut state by the elastic clamping of the two pressure rollers, laying the foundation for subsequent conveying and dust removal.

[0042] Step 3: Using the main conveyor system of the printing machine, the fabric is conveyed. At this time, the guide roller 311 rotates in coordination, and the fixed elastic pressure roller 310 and the movable elastic pressure roller 34 rotate synchronously with the fabric movement. Utilizing the friction of the elastic material, the fabric is stably pulled, ensuring a uniform conveying speed. The high-pressure air pipe 210 is turned on, connecting to an external air compressor and air tank. Compressed air is distributed through the distributor pipe 29 and flows into the bend pipe 211. Due to the inclined angle design of the bend pipe 211, the high-pressure airflow is ejected obliquely from the nozzle, forming... The directional airflow jet, when impacting the fabric surface, uses kinetic energy to peel off dust and lint, causing impurities to detach from the fabric and enter the airflow circulation area inside the dust cover 2. The exhaust fan 27 operates continuously, creating a negative pressure environment inside the dust collection hopper 22. The peeled dust and lint are carried by the airflow to the dust collection hopper 22 and collected. After being collected by the dust collection hopper 22, they are transported to the air box 24 through the connecting pipe 23. The filter screen 26 inside the air box 24 intercepts impurities, and clean air is discharged through the exhaust fan 27. The sealing frame 25 inside the air box 24 can be removed periodically to clean or replace the filter screen 26.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fabric conveying device for a digital printing machine, comprising a base (1), characterized in that: A dust removal mechanism is provided above the base (1); The dust removal mechanism includes a dust cover (2), the lower end of which is fixedly connected to the upper end of the base (1). The dust cover (2) has symmetrically distributed through slots (21) on both sides. A dust suction hopper (22) is fixedly connected to the rear inner wall of the dust cover (2). A symmetrically distributed connecting pipe (23) is fixedly connected to the back of the dust suction hopper (22). One end of each of the two connecting pipes (23) passes through the dust cover (2) and is fixedly connected to a bellows (24). A flattening mechanism is provided above the base (1).

2. The fabric conveying device for a digital printing machine according to claim 1, characterized in that: The front of the bellows (24) is fixedly connected to the back of the dust cover (2), and a sealing frame (25) is movably inserted into the back of the bellows (24). A filter screen (26) is fixedly sleeved on the inner wall of the sealing frame (25).

3. The fabric conveying device for a digital printing machine according to claim 2, characterized in that: An exhaust fan (27) is fixedly installed at the lower end of the air box (24), and symmetrically distributed guide blocks (28) are fixedly connected to the front inner wall of the dust cover (2). A diversion pipe (29) is fixedly connected to the opposite surfaces of the two guide blocks (28).

4. The fabric conveying device for a digital printing machine according to claim 3, characterized in that: The outside of the diverter (29) is fixedly connected to a high-pressure air pipe (210). One end of the high-pressure air pipe (210) passes through and extends to the front of the dust cover (2). The surfaces of the two guide blocks (28) opposite each other are fixedly connected to bends (211) arranged in a linear array. One end of the bends (211) is fixedly installed with a high-pressure nozzle (212).

5. The fabric conveying device for a digital printing machine according to claim 1, characterized in that: The leveling mechanism includes a fixed frame (3), the lower end of the fixed frame (3) is fixedly connected to the upper end of the base (1), and the inner walls of both sides of the fixed frame (3) are provided with symmetrically distributed sliding grooves (31). The inner walls of the sliding grooves (31) are slidably connected with guide sliders (32), and the surfaces of the two guide sliders (32) opposite each other are fixedly connected with movable seats (33).

6. The fabric conveying device for a digital printing machine according to claim 5, characterized in that: The inner walls of both sides of the movable seat (33) are rotatably connected to movable elastic pressure rollers (34) via bearings. The upper end of the movable seat (33) is fixedly connected to symmetrically distributed limiting rods (35). One end of each of the two limiting rods (35) passes through and extends to the top of the fixed frame (3). An adjusting plate (36) is slidably sleeved on the outside of each of the two limiting rods (35). The lower end of the adjusting plate (36) is fixedly connected to symmetrically distributed support springs (37).

7. The fabric conveying device for a digital printing machine according to claim 6, characterized in that: One end of each of the two support springs (37) is fixedly connected to the upper end of the movable seat (33). A servo electric cylinder (38) is fixedly installed on the upper end of the fixed frame (3). One end of the piston rod of the servo electric cylinder (38) passes through the fixed frame (3) and is fixedly installed with a pressure sensor (39). The lower end of the pressure sensor (39) is fixedly installed with the upper end of the adjusting plate (36). Fixed elastic pressure rollers (310) are rotatably connected to the inner walls of both sides of the fixed frame (3) through bearings. A guide roller (311) is provided above the base (1). An inspection door (4) is provided on the front of the dust cover (2).

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