A cloth feeding device of a flat screen printing machine

Abstract

The utility model discloses a cloth feeding device of flat screen printing machine belongs to textile printing mechanical technical field. Cloth feeding device includes conveyer, and the conveying path of conveyer is provided with cleaning mechanism and tension adjusting mechanism in proper order. Cleaning mechanism includes installation box, motor, gear, rack, guide rod no. The core of mechanism is in with buffer assembly, and buffer assembly utilizes guide rod no. 2, sliding block and spring, has realized the flexible lifting of brush roller to cloth. Tension adjusting mechanism includes protection box, electric push rod, support rod, swing rod and tension roller. The utility model solves the problem of the prior art that cleaning mechanism is easy to damage delicate fabric, and the tension control is unstable, through the cleaning mechanism with buffer, ensures that the cleaning strength is uniform and the fabric is protected, through the automatic tension adjusting mechanism, ensures the flat conveying of cloth, effectively improves the printing quality and the yield.

Description

Technical Field

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

[0002] Flatbed printing is an important printing process in the textile industry, widely used for its advantages such as ease of operation, wide adaptability, and fine patterns. In the flatbed printing process, the quality of the print is closely related to the fabric feeding stage before printing; a stable and reliable fabric feeding process is the foundation for ensuring the final print yield and quality.

[0003] To obtain clear, flawless printed patterns, the surface of the fabric to be printed must be kept highly clean. During production, storage, and transportation, the fabric surface inevitably accumulates impurities such as dust, loose threads, and short fibers. If these impurities are not removed, they will hinder the bonding of dyes to fibers during printing, leading to defects such as white spots, color spots, or blurred pattern edges, severely affecting the product's appearance and quality. Therefore, modern fabric feeding devices typically integrate a pre-cleaning function for the fabric surface.

[0004] However, many existing flatbed screen printing machines have structural deficiencies in their fabric feeding devices when performing the cleaning function. These devices typically use fixed-position or simply mechanically adjustable brush rollers to clean the fabric. This design works well for thick, abrasion-resistant fabrics, but as textiles become lighter, more delicate, and more functional, more and more printed fabrics, such as silk, chiffon, or high-elasticity fabrics, are extremely sensitive to mechanical forces. The rigid cleaning method of existing devices makes it difficult to precisely control the contact pressure between the brush roller and the fabric. Excessive pressure can easily cause scratches, snags, or even stretching deformation on the surface of these delicate fabrics. These damages cause irreversible damage to the fabric before printing, directly reducing the value of the product.

[0005] Therefore, this utility model proposes a fabric feeding device for a flatbed printing machine to overcome the shortcomings of the prior art. Utility Model Content

[0006] In the existing technology, the fabric feeding device of the flatbed printing machine has problems such as unreasonable design of the cleaning mechanism, the use of rigid cleaning method which easily leads to scratches or snagging on the surface of delicate fabrics, and the lack of an effective mechanism to adjust the fabric tension, resulting in low printing accuracy.

[0007] This utility model provides a fabric feeding device for a flatbed printing machine, including a conveyor; a cleaning mechanism and a tension adjustment mechanism are sequentially arranged on the conveyor along its material conveying path.

[0008] The cleaning mechanism includes a mounting box, inside which a motor serving as a drive source is fixedly connected. A guide rod is also slidably inserted inside the mounting box, and a rack is fixedly connected to the outer wall of the guide rod. The output end of the motor is driven by the gear meshing with the rack.

[0009] A fixing plate is fixedly connected to the bottom of the guide rod, and a brush roller is rotatably connected to the fixing plate.

[0010] The cleaning mechanism also includes a buffer assembly, which includes a guide rod two fixed to the inner wall of the mounting box, a sliding block fixedly connected to the fixed plate, and the sliding block slidably sleeved on the guide rod two; a spring is sleeved on the outer wall of the guide rod two, and the two ends of the spring abut against the inner wall of the mounting box and the outer wall of the sliding block, respectively.

[0011] Preferably, the tension adjustment mechanism includes a protective box, a support rod fixedly connected inside the protective box, and a swing rod rotatably connected inside the protective box, the middle part of the swing rod rotating around the support rod; the protective box also has an electric push rod, the driving end of the electric push rod is driven and connected to a sliding plate, the sliding plate is slidably connected to one end of the swing rod, and the other end of the swing rod is rotatably connected to a tension roller.

[0012] Furthermore, the tension adjustment mechanism can be precisely controlled by an electric push rod to drive the swing rod and tension roller to apply or release tension to the fabric, thereby achieving dynamic and automatic adjustment of the fabric tension and ensuring the fabric is flat.

[0013] Preferably, a fixed rod is fixedly connected to the sliding plate, and a groove extending along the length of the swing rod is provided on the swing rod, with the fixed rod slidably disposed in the groove.

[0014] Furthermore, this sliding fit structure between the fixed rod and the groove efficiently converts the linear motion output by the electric push rod into the angular oscillation of the swing rod, with a simple and reliable transmission chain and precise motion.

[0015] Preferably, the motor is a reversible motor, and the lifting and lowering of the brush roller is achieved by controlling the forward and reverse rotation of the motor.

[0016] Furthermore, the adoption of a reversible motor automates and programs the lifting control of the cleaning mechanism, allowing operators to easily control the brush roller to descend to the working position or rise to reset according to the type of fabric or cleaning needs, resulting in a high degree of intelligence.

[0017] Preferably, the axis of rotation of the brush roller is parallel to the conveying plane of the conveyor.

[0018] Furthermore, the rotation axis of the brush roller is parallel to the conveying plane, ensuring that the bristles can evenly and comprehensively cover the entire width of the fabric when the brush roller rotates, avoiding cleaning blind spots and ensuring the uniformity of cleaning quality.

[0019] Preferably, the rotation axis of the tension roller is parallel to the conveying plane of the conveyor.

[0020] Furthermore, the rotation axis of the tension roller is parallel to the conveying plane, ensuring that the adjustment force applied by the tension roller to the fabric is evenly distributed across the entire width of the fabric, preventing unilateral stretching or deviation of the fabric during the adjustment process, and maintaining the flatness of the fabric.

[0021] Preferably, the extension and retraction direction of the electric push rod is parallel to the conveying direction of the conveyor.

[0022] Furthermore, the layout of the electric actuator with its extension direction perpendicular to the conveying direction makes the installation of the drive device more compact and occupies less space. At the same time, it ensures that the direction of force transmission is consistent with the direction of the main body of the equipment, resulting in a reasonable structural layout and good stability.

[0023] Preferably, the rack and guide rod are an integral structure, with the gear meshing with the rack portion on the outer wall of the guide rod.

[0024] Furthermore, the rack and guide rod adopt an integrated structure, which reduces assembly steps and the risk of potential loosening of the connection, improves the rigidity and transmission accuracy of the components, simplifies the structure, and reduces manufacturing costs.

[0025] This utility model has the following beneficial effects: 1. This utility model, by setting up a lifting cleaning mechanism with a buffer component, uses a motor to drive a gear rack to raise and lower the brush roller, and utilizes a spring-based buffer component to achieve flexible contact with the fabric. This solves the problems of the existing fabric feeding device having a single cleaning function and the easy damage to thin and brittle fabrics due to rigid friction during the cleaning process. It achieves the technical effect of efficiently removing impurities from the fabric surface, adapting to fabrics of different thicknesses and effectively protecting their surface from damage, and significantly improving the cleanliness of the fabric before printing.

[0026] 2. This utility model, by setting up a linkage-type tension adjustment mechanism driven by an electric push rod, controls the swing rod to drive the tension roller to deflect through the electric push rod, thereby adjusting the tension acting on the fabric in real time. This solves the problems of the lack of effective automatic tension control in the existing fabric feeding device and the fabric being prone to accumulation or overstretching due to unstable tension. It achieves the technical effect of precise, automatic and stable tension transmission, ensuring that the fabric remains flat and moderately tensioned throughout the entire fabric feeding process, providing an ideal fabric state for subsequent high-precision printing.

[0027] 3. This utility model integrates the cleaning mechanism and the tension adjustment mechanism into a single, modular design along the conveying path. It has a compact structure and a high degree of automation, which solves the problems of existing technologies where cleaning and tension control functions are separated, multiple equipment combinations are required, space is occupied, and operation is cumbersome. It achieves the technical effects of simplifying equipment structure, optimizing production process, and improving production efficiency. It effectively reduces the printing waste rate caused by improper fabric preparation and improves the overall quality and consistency of printed products. Attached Figure Description

[0028] Figure 1 This is a three-dimensional schematic diagram of the fabric feeding device of a flatbed printing machine according to the present invention; Figure 2 This is a schematic diagram of the conveyor structure of the fabric feeding device of a flatbed printing machine according to the present invention; Figure 3 This is a schematic diagram of the mounting box for the fabric feeding device of a flatbed printing machine according to the present invention; Figure 4 This is a schematic diagram of the protective box of the fabric feeding device of a flatbed printing machine proposed in this utility model.

[0029] Legend: 1. Conveyor; 2. Cleaning mechanism; 21. Mounting box; 22. Motor; 23. Gear; 24. Guide rod one; 25. Rack; 26. Fixing plate; 27. Sliding block; 28. Buffer assembly; 281. Guide rod two; 282. Spring; 3. Tension adjustment mechanism; 31. Protective box; 32. Electric push rod; 33. Sliding plate; 34. Fixing rod; 35. Support rod; 36. Swing rod; 4. Brush roller; 5. Tension roller. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0031] Example: Reference Figures 1 to 4 This utility model provides a fabric feeding device for a flatbed printing machine, which aims to solve the problems of poor fabric cleaning effect, easy damage to the fabric, and unstable transmission tension that affect the printing accuracy of existing flatbed printing machine fabric feeding devices.

[0032] The fabric feeding device of the flatbed printing machine includes a conveyor 1. A cleaning mechanism 2 and a tension adjusting mechanism 3 are sequentially arranged on the conveyor 1 along its material conveying path. The conveyor 1 is used to carry and transport the fabric to be printed. The cleaning mechanism 2 is used to remove impurities from the surface of the fabric, and the tension adjusting mechanism 3 is used to stabilize the tension of the fabric during the conveying process. Through the coordinated work of the cleaning mechanism 2 and the tension adjusting mechanism 3, it is ensured that the fabric entering the printing process has a clean surface and a flat state.

[0033] The cleaning mechanism 2 includes a mounting box 21, which serves as the mounting carrier for the entire cleaning mechanism 2, with its bottom facing the conveyor 1. A motor 22, which serves as the drive source, is fixedly connected inside the mounting box 21, and a gear 23 is driven by the output end of the motor 22. A guide rod 24 is also slidably inserted inside the mounting box 21, and a rack 25 is fixedly connected to the outer wall of the guide rod 24. The rack 25 and the guide rod 24 can be an integral structure, and the gear 23 meshes with the rack 25 portion on the outer wall of the guide rod 24 for transmission. The motor 22 is a reversible motor. By controlling the forward and reverse rotation of the motor 22, the guide rod 24 can be driven to move up and down and reciprocate within the mounting box 21 via the transmission of the gear 23 and the rack 25.

[0034] A fixing plate 26 is fixedly connected to the bottom of the guide rod 24, and the fixing plate 26 rises and falls synchronously with the guide rod 24. A brush roller 4 is rotatably connected to the fixing plate 26, and the rotation axis of the brush roller 4 is parallel to the conveying plane of the conveyor 1, which is used to rotate and clean the fabric surface when it descends to the working position. The cleaning mechanism 2 also includes a buffer assembly 28, which is used to provide flexible cushioning when the brush roller 4 contacts the fabric to avoid rigid impact damage to the fabric. Specifically, the buffer assembly 28 includes a guide rod 281. 281 is vertically fixed to the inner wall of the mounting box 21; a sliding block 27 is fixedly connected to the fixing plate 26, and the sliding block 27 is slidably sleeved on the guide rod 281, so that the fixing plate 26 is more stable during the lifting process; a spring 282 is sleeved on the outer wall of the guide rod 281, and the two ends of the spring 282 abut against the inner wall of the mounting box 21 and the outer wall of the sliding block 27 respectively. When the brush roller 4 contacts the fabric downward, the spring 282 is compressed, thereby generating a buffer force opposite to the downward force, ensuring the uniformity and gentleness of the cleaning pressure.

[0035] The tension adjustment mechanism 3 includes a protective box 31, which serves as the main mounting body for the tension adjustment mechanism 3. It is fixed to the conveyor 1 and located downstream of the conveying direction of the cleaning mechanism 2. A support rod 35, which serves as a fulcrum for rotation, is fixedly connected inside the protective box 31. A swing rod 36 is also rotatably connected inside the protective box 31. The middle part of the swing rod 36 rotates around the support rod 35, thereby adjusting the tension acting on the fabric by swinging up and down. An electric push rod 32, which serves as a linear drive source, is also provided inside the protective box 31. The extension and retraction direction of the electric push rod 32 is parallel to the conveying direction of the conveyor 1. A sliding plate 33 is driven and connected to the drive end of the electric push rod 32. Through the extension and retraction of the electric push rod 32, the sliding plate 33 can be driven to perform linear reciprocating motion.

[0036] The sliding plate 33 is slidably connected to one end of the swing rod 36, while the other end of the swing rod 36 is rotatably connected to the tension roller 5. The rotation axis of the tension roller 5 is parallel to the conveying plane of the conveyor 1, and is used to directly contact and adjust the tension of the fabric. Specifically, a fixed rod 34 is fixedly connected to the sliding plate 33, and a corresponding groove extending along the length of the swing rod 36 is provided on the swing rod 36. In the assembled state, the fixed rod 34 is slidably disposed in the groove of the swing rod 36. This sliding fit structure formed by the fixed rod 34 and the groove effectively converts the linear motion of the sliding plate 33 into the rotational motion of the swing rod 36 around the support rod 35, thereby driving the tension roller 5 to achieve lifting and deflection. When the fabric tension is too low, the electric push rod 32 extends and pushes the sliding plate 33, which in turn causes the swing rod 36 to drive the tension roller 5 to press down the fabric through the linkage structure, increasing the tension. When the fabric tension is too high, the electric push rod 32 retracts and drives the tension roller 5 to lift in the opposite direction, reducing the tension and ensuring the stability and controllability of the fabric tension.

[0037] The guide rod 24, installed inside the mounting box 21, slides along its length through the corresponding through hole in the mounting box 21, providing precise guidance and support for the linear movement of the rack 25. The rack 25 and the guide rod 24 are an integral structure, with the gear 23 directly meshing with the rack 25 portion machined on the outer wall of the guide rod 24. This structure is compact and has high transmission efficiency. The motor 22 is a reversible motor. By controlling the forward or reverse rotation of the motor 22 through an external controller, the brush roller 4 can be easily driven to automatically descend for cleaning or rise for resetting. The support rod 35, fixedly connected inside the protective box 31, provides a fixed rotation center for the swing rod 36, ensuring the precise movement trajectory of the swing rod 36 during adjustment, thereby guaranteeing the accuracy of tension adjustment. The extension and retraction direction of the electric push rod 32 is perpendicular to the conveying direction of the conveyor 1. This layout allows the linear driving force output by the electric push rod 32 to be efficiently converted into the rotational torque of the swing rod 36 through the linkage mechanism.

[0038] The implementation principle of this application embodiment is as follows: the conveyor 1 removes surface impurities through the cleaning mechanism 2 to keep the fabric surface clean, and stabilizes the conveying tension with the help of the tension adjustment mechanism 3 to maintain stable conveying. The brush roller 4 and the tension roller 5 are the core execution components.

[0039] After the fabric is placed on the conveyor 1, if there are too many impurities on the fabric, the cleaning mechanism 2 on the conveyor 1 is used to clean it. The cleaning mechanism 2 uses the mounting box 21 as the mounting frame to realize the lifting and lowering of the brush roller 4 for cleaning. The motor 22 in the mounting box 21 is started, and its drive end drives the gear 23 to rotate. The gear 23 meshes with the rack 25 on the outer wall of the guide rod 24, converting the rotational motion into the linear sliding of the rack 25. The rack 25 drives the bottom fixing plate 26 and the internally rotating brush roller 4 to descend synchronously until the brush roller 4 is in contact with the fabric surface to achieve cleaning. The sliding block 27 on the outer wall of the brush roller 4 slides along the guide rod 281 of the buffer assembly 28. The spring 282 on the outer wall of the guide rod 281 is connected at one end to the inner wall of the mounting box 21 and at the other end to the outer wall of the sliding block 27, which can buffer the contact pressure between the brush roller 4 and the fabric, avoid damage caused by rigid friction, and ensure uniform cleaning force. After cleaning, motor 22 reverses its direction, causing brush roller 4 to rise and reset. This allows for adjustment of brush adhesion, ensuring cleaning effectiveness, preventing damage to thin and fragile fabrics, facilitating equipment maintenance, addressing fabric abnormalities, and improving fabric feeding stability and printing quality.

[0040] When the fabric tension becomes slack or excessive during transmission, the tension adjustment mechanism 3 uses the protective box 31 as the operating carrier and adjusts the transmission tension through the tension roller 5. The electric push rod 32 inside the protective box 31 is activated, its drive end moves the sliding plate 33 linearly, and the fixed rod 34 on the sliding plate 33 slides along the groove on the inner wall of the swing rod 36, pushing the swing rod 36 to rotate around the support rod 35 inside the protective box 31. The swing rod 36 drives the tension roller 5 rotating on the inner wall to deflect synchronously, adjusting the fabric tension by changing the angle of the tension roller 5. When the fabric is slack, the electric push rod 32 pushes the tension roller 5 downward to increase the tension; when the tension is excessive, the electric push rod 32 contracts, causing the tension roller 5 to move upward to decrease the tension. The support rod 35 provides a stable fulcrum for the swing rod 36, ensuring precise and controllable tension adjustment. The tension adjustment mechanism 3 can stabilize the fabric tension, preventing excessive slack or excessive stretching, adapting to different fabrics, ensuring flat fabric transmission, improving cleaning and smoothing effects, reducing printing misalignment and deformation, and lowering the scrap rate.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fabric feeding device for a flatbed printing machine, comprising a conveyor (1), characterized in that, The conveyor (1) is provided with a cleaning mechanism (2) and a tension adjustment mechanism (3) in sequence along its material conveying path. The cleaning mechanism (2) includes a mounting box (21), in which a motor (22) serving as a drive source is fixedly connected. A guide rod (24) is also slidably inserted inside the mounting box (21). A rack (25) is fixedly connected to the outer wall of the guide rod (24). The output end of the motor (22) is driven by meshing with the rack (25) through a gear (23). A fixing plate (26) is fixedly connected to the bottom of the guide rod (24). A brush roller (4) is rotatably connected to the fixing plate (26). The cleaning mechanism (2) further includes a buffer assembly (28), which includes a guide rod (281) fixed to the inner wall of the mounting box (21). A sliding block (27) is fixedly connected to the fixing plate (26). The sliding block (27) is slidably sleeved on the guide rod (281). A spring (282) is sleeved on the outer wall of the guide rod (281). The two ends of the spring (282) abut against the inner wall of the mounting box (21) and the outer wall of the sliding block (27), respectively.

2. The fabric feeding device of a flatbed printing machine according to claim 1, characterized in that, The tension adjustment mechanism (3) includes a protective box (31), a support rod (35) is fixedly connected inside the protective box (31), and a swing rod (36) is rotatably connected inside the protective box (31). The middle part of the swing rod (36) rotates around the support rod (35). An electric push rod (32) is also provided inside the protective box (31). A sliding plate (33) is driven to the drive end of the electric push rod (32). The sliding plate (33) is slidably connected to one end of the swing rod (36), and a tension roller (5) is rotatably connected to the other end of the swing rod (36).

3. The fabric feeding device of a flatbed printing machine according to claim 2, characterized in that, A fixed rod (34) is fixedly connected to the sliding plate (33), and a groove extending along the length of the swing rod (36) is provided on the swing rod (36). The fixed rod (34) is slidably disposed in the groove.

4. The fabric feeding device of a flatbed printing machine according to claim 1, characterized in that, The motor (22) is a reversible motor, and the brush roller (4) can be raised and lowered by controlling the forward and reverse rotation of the motor (22).

5. The fabric feeding device of a flatbed printing machine according to claim 1, characterized in that, The rotation axis of the brush roller (4) is parallel to the conveying plane of the conveyor (1).

6. The fabric feeding device of a flatbed printing machine according to claim 2, characterized in that, The rotation axis of the tension roller (5) is parallel to the conveying plane of the conveyor (1).

7. The fabric feeding device of a flatbed printing machine according to claim 2, characterized in that, The extension and retraction direction of the electric push rod (32) is perpendicular to the conveying direction of the conveyor (1).

8. The fabric feeding device of a flatbed printing machine according to claim 1, characterized in that, The rack (25) and the guide rod (24) are an integral structure, and the gear (23) meshes with the rack (25) portion on the outer wall of the guide rod (24).

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