Preparation method and device of knitted and printed antibacterial carpet

Abstract

The invention discloses a preparation method and device of a knitted and printed antibacterial carpet, and belongs to the technical field of textile processing. The preparation method comprises the following steps: dragging the knitted carpet to an antibacterial treatment station through a transmission system; a jacking rod assembly arranged in the middle fixing roller is used for applying force upwards from the bottom face of the carpet, so that the carpet is locally raised; the jacking rod assembly is driven to continuously move in the carpet banner direction to form a dynamic upheaval zone, and the antibacterial agent spray gun synchronously follows and aims at the upheaval portion to spray an atomized antibacterial agent; antibacterial treatment of the whole carpet is completed through cooperation of transverse continuous treatment and longitudinal intermittent propelling; and finally entering a printing station to finish surface pattern printing. The preparation device comprises a carpet conveying system, a bulge forming system and an antibacterial agent applying system, wherein the bulge forming system and the antibacterial agent applying system are completely integrated in a middle fixed roller. The upheaval forming system drives a movable frame through a synchronous belt transmission mechanism to drive a jacking rod assembly to reciprocate along a guide rail, and a jacking rod penetrates through a long groove of a middle fixing roller to jack a carpet from the bottom.

Description

Technical Field

[0001] This invention relates to the field of textile processing technology, specifically to a method and apparatus for preparing knitted printed antibacterial carpets, and particularly to a knitted carpet processing technology that can achieve deep antibacterial treatment without affecting the subsequent printing effect. Background Technology

[0002] Knitted carpets are widely used in indoor environments such as homes, hotels, and offices due to their softness, comfort, elasticity, and pleasant feel underfoot. To meet decorative and aesthetic needs, knitted carpets typically undergo surface printing to create various patterns and colors. However, because carpets are frequently used in high-traffic areas, they are prone to harboring bacteria, mold, and other microorganisms, affecting the hygiene of the environment and the health of users. Therefore, the antibacterial properties of knitted carpets are receiving increasing attention.

[0003] Currently, the production of knitted printed carpets typically employs two processes: printing followed by antibacterial treatment, or antibacterial treatment followed by printing. Printing before antibacterial treatment: After the surface printing and dyeing of the knitted carpet are completed, the whole carpet is treated with antibacterial agent. The main problems of this process are: (1) The antibacterial agent mainly adheres to the surface of the carpet and is difficult to penetrate into the middle and bottom layers. The antibacterial effect is not lasting and is easily lost due to surface wear; (2) The antibacterial agent will cover the surface of the printed pattern and may react with the dye, causing the color to fade, darken or change in hue, affecting the printing effect; (3) Some antibacterial agents have oxidizing properties or are incompatible with the molecular structure of the dye, which will destroy the chromophores of the dye, causing the pattern to be blurred or have color difference.

[0004] Antibacterial treatment before printing: Before printing on knitted carpets, an overall antibacterial treatment is performed, and printing is carried out after the antibacterial agent has cured. The main problems with this process are: (1) When antibacterial treatment is performed by conventional immersion, spraying or coating methods, the antibacterial agent will be evenly distributed on the surface, middle and bottom layers of the carpet, resulting in the surface fibers being coated with the antibacterial agent; (2) The film layer formed by the antibacterial agent on the fiber surface will reduce the dye affinity of the fiber, making it difficult for the dye to be adsorbed and penetrated during subsequent printing, resulting in dull, unsaturated and uneven printing colors; (3) In order to overcome the difficulty of dye adsorption, it is necessary to increase the printing temperature or increase the dye concentration, which not only increases production costs and energy consumption, but may also damage carpet fibers and affect product quality; (4) Some antibacterial agents will decompose or volatilize under high temperature printing conditions, reducing the antibacterial effect.

[0005] Existing technologies also include some local antibacterial treatment methods, such as using masks, templates, or selective spraying to treat only certain areas of the carpet to avoid affecting the printed area. However, these methods have the following shortcomings: (1) They are complex to operate, require precise alignment, and have low production efficiency; (2) They can only achieve local surface antibacterial treatment and cannot solve the problem of deep antibacterial treatment; (3) The production and replacement costs of masks or templates are high, making them unsuitable for multi-variety, small-batch production; (4) There is a clear boundary between the antibacterial area and the non-antibacterial area, which affects the continuity and uniformity of the overall antibacterial effect.

[0006] Furthermore, existing antibacterial agent application technologies primarily target carpets in a flat state. The antibacterial agents can only penetrate the fibers through natural penetration or capillary action, resulting in limited depth. Most of the antibacterial agent remains on the outer surface or middle layer, failing to reach the backing material. The backing of a carpet is often the area most prone to bacterial and mold growth due to its consistently damp, poorly ventilated environment and difficulty in cleaning. Carpets with surface antibacterial treatment but not the backing material suffer a significant reduction in overall antibacterial performance and durability. Summary of the Invention

[0007] The purpose of this invention is to provide a method and apparatus for preparing knitted printed antibacterial carpets. By performing a special antibacterial treatment on the knitted carpet before printing, the antibacterial agent can penetrate deeply into the middle and bottom layers of the carpet, while the surface layer remains clean. This achieves deep antibacterial function without affecting the color effect of the subsequent printing process.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides a method for preparing a knitted printed antibacterial carpet, comprising the following steps: S1: Carpet entry and positioning: The knitted carpet is pulled into the antibacterial treatment station by the transmission traction roller. The upper surface of the knitted carpet is pressed by the first pressure roller and the second pressure roller, and the lower surface is attached to the outer surface of the middle fixed roller. S2: Raising and forming, by applying force from the bottom surface of the knitted carpet upward through the lifting rod assembly set inside the middle fixed roller, the knitted carpet is locally raised at the point of application. The top rod of the lifting rod assembly extends through the long groove of the middle fixed roller, and the force transmission joint contacts the bottom surface of the knitted carpet and applies lifting force. S3: Synchronous spraying and transverse treatment, drive the lifting rod assembly to move continuously along the horizontal direction of the knitted carpet to form a dynamic raised band, and the antibacterial agent spray gun moves synchronously and sprays atomized antibacterial agent continuously at the raised part, so that the antibacterial agent penetrates deep into the middle and bottom layers of the knitted carpet along the raised fiber channels. S4: Longitudinal advancement and cyclic processing. After the lifting rod assembly completes the full width processing of the horizontal width, the knitted carpet returns to a flat state. The transmission traction roller and transmission push roller start synchronously, advancing the knitted carpet forward by one longitudinal step. The lifting rod assembly returns to the starting position of the horizontal width. Repeat steps S2 to S3 until the antibacterial treatment of the entire knitted carpet is completed. S5: Subsequent printing. After antibacterial treatment, the knitted carpet enters the printing station for surface pattern printing.

[0009] During the bulging process, the fiber structure of the knitted carpet undergoes three-dimensional deformation. The surface fibers spread out to both sides at the bulge apex, the middle layer base fabric fiber network expands due to bending, and the bottom backing is stretched radially. The antibacterial agent is mainly enriched and fixed in the middle layer fiber network and the bottom backing, while the surface fibers remain basically clean.

[0010] Furthermore, between steps S1 and S2, a tension adjustment step is also included: when the knitted carpet reaches the predetermined processing position, the transmission traction roller stops rotating to fix the front section of the knitted carpet, and the transmission push roller continues to push forward, so that the knitted carpet located between the first pressure roller and the second pressure roller is locally relaxed, providing the necessary allowance for bulging.

[0011] Furthermore, the force transmission joint adopts a roller structure, which rolls freely with the lateral movement of the lifting rod assembly when in contact with the bottom surface of the knitted carpet, forming rolling contact rather than sliding friction, effectively avoiding dragging damage to the bottom of the knitted carpet.

[0012] Furthermore, the intermediate fixed roller is a hollow roller structure, with an axially extending guide rail and a movable frame that cooperates with the guide rail inside. The lifting rod assembly is mounted on the movable frame and is driven by a synchronous belt transmission mechanism to perform reciprocating linear motion along the guide rail.

[0013] Furthermore, the synchronous belt transmission mechanism includes a synchronous belt, with both ends of the synchronous belt fixed to fixed points at both ends of the intermediate fixed roller body. The middle part of the synchronous belt is fixedly connected to the moving frame. The drive motor drives the synchronous belt pulley to rotate through the reducer, thereby driving the synchronous belt to move, and then driving the moving frame to move along the guide rail.

[0014] Furthermore, the two edges of the long groove are provided with detachable fixed guide shafts to guide the lifting rod assembly's lifting movement and prevent the knitted carpet from sinking into the groove.

[0015] Furthermore, in step S3, according to the antibacterial requirements of the knitted carpet, one of the following processing methods can be adopted: (1) Continuous processing: the mobile frame moves continuously, and the antibacterial agent spray gun sprays synchronously and continuously to complete the uniform processing of the entire width of the horizontal strip; (2) Point-by-point processing: after the mobile frame moves to the predetermined position and stops, the antibacterial agent spray gun sprays in a concentrated manner for a certain period of time, and then the mobile frame moves to the next point; (3) Segment-by-segment processing: the mobile frame moves continuously and sprays in the set area, while no processing is carried out in other areas, so as to achieve partitioned antibacterial or enhanced antibacterial in key areas.

[0016] Furthermore, the intermediate fixed roller has rotation adjustment and angle locking functions. By rotating the intermediate fixed roller, the position of the long groove relative to the knitted carpet can be changed, thereby adjusting the relative position of the action point of the lifting rod assembly or changing the direction of the lifting force to adapt to knitted carpets of different materials, thicknesses or antibacterial requirements.

[0017] The present invention also provides a preparation device for knitted printed antibacterial carpets, integrated into a knitted carpet printing production line, and set at an antibacterial treatment station before the printing station, comprising: The carpet conveying system includes a conveying traction roller, a conveying push roller, and an intermediate fixing roller located below the knitted carpet during operation, as well as a first pressure roller and a second pressure roller located above the knitted carpet during operation. The raised forming system is completely installed inside the hollow roller body of the intermediate fixed roller, including: a guide rail extending axially along the intermediate fixed roller and fixed on the inner wall of the roller body; a movable frame cooperating with the guide rail via a linear slider; a synchronous belt drive mechanism for driving the movable frame to perform reciprocating linear motion along the guide rail; a lifting drive mechanism mounted on the movable frame; and a lifting rod assembly including a top rod and a force transmission joint, wherein the top rod passes through the long groove of the intermediate fixed roller from inside the roller body and acts on the bottom surface of the knitted carpet. An antibacterial agent application system includes an antibacterial agent spray gun and an antibacterial agent supply system. The antibacterial agent spray gun is positioned above the first pressure roller and the second pressure roller. The antibacterial agent spray gun moves synchronously with the moving frame and sprays atomized antibacterial agent onto the raised area.

[0018] Furthermore, the antibacterial agent supply system includes a storage tank, a metering pump, a pressure regulating valve, and a flow controller to ensure that the antibacterial agent is sprayed out at a stable flow rate and pressure.

[0019] The beneficial effects of this invention are as follows: By using an innovative method of lifting from the bottom to form a raised area, the knitted carpet fiber structure undergoes three-dimensional deformation, the fiber gaps expand, and penetration channels are formed, allowing the antibacterial agent to penetrate deep into the middle and bottom layers, forming a long-lasting deep antibacterial barrier. The surface fibers remain largely clean during the bulging process and are unaffected by antibacterial agents, ensuring the normal adsorption and fixation of dyes in subsequent printing processes, resulting in bright and full color effects. The force transmission joint with a roller structure forms rolling contact rather than sliding friction, effectively avoiding dragging damage to the bottom of the knitted carpet; By combining continuous horizontal spraying and intermittent vertical advance, the entire knitted carpet can be uniformly covered. It supports multiple processing modes such as continuous processing, point-by-point processing, and segment-by-segment processing, and can achieve zoned antibacterial or enhanced antibacterial in key areas according to different product needs; The rotation adjustment function of the intermediate fixed roller enables the device to adapt to knitted carpets of different materials and thicknesses, making it highly adaptable to various processes. The bulging forming system is fully integrated inside the intermediate fixed roller, with a compact structure that does not occupy additional space and is easy to integrate into existing production lines. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a partial top view schematic diagram of the knitted printed antibacterial carpet preparation device of the present invention; Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure along the AA direction; Figure 3 yes Figure 2 The enlarged view at point A shows the detailed structure of the internal bulging forming system of the intermediate fixed roller, including the cooperation relationship between the guide rail, the moving frame, the synchronous belt drive mechanism, and the lifting rod assembly. Figure 4 This is a schematic diagram of the working state of the present invention, showing the raised state of the knitted carpet and the process of spraying antibacterial agent; Figure 5 yes Figure 4 The enlarged view at point B shows the contact state between the force transmission joint of the lifting rod assembly and the bottom surface of the knitted carpet, as well as the three-dimensional deformation of the carpet fibers.

[0021] The labels in the diagram represent: 01 Knitted carpet, 02 Antibacterial spray gun, 10 Transmission traction roller, 20 Transmission push roller, 30 Intermediate fixed roller, 31 Long groove, 32 Fixed guide shaft, 40 First pressure roller, 50 Second pressure roller, 60 Raised forming system, 61 Guide rail, 62 Moving frame, 63 Synchronous belt drive mechanism, 631 Synchronous belt, 65 Lifting drive mechanism, 66 Lifting rod assembly, 661 Top rod, and 662 Force transmission joint. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] Example 1: like Figures 1-5 As shown, this embodiment provides a preparation device for knitted printed antibacterial carpets. This device is integrated into a knitted carpet printing production line and is located at the antibacterial treatment station before the printing station. The device mainly comprises three parts: a carpet conveying system, a raised forming system 60, and an antibacterial agent application system. The carpet conveying system consists of multiple sets; it can utilize one set from the original production line or be modified accordingly. For ease of description, this embodiment describes a complete set.

[0024] The carpet conveying system includes a conveying traction roller 10, a conveying push roller 20, and an intermediate fixing roller 30 located below the knitted carpet 01 during operation; and a first pressure roller 40 and a second pressure roller 50 located above the knitted carpet 01 during operation.

[0025] like Figure 1 As shown, the knitted carpet 01 to be processed is conveyed horizontally. The conveying traction roller 10 is located at the front end of the device and is responsible for pulling the knitted carpet 01 from the upstream station to this station; the conveying push roller 20 is located at the rear end of the device and is responsible for pushing the processed knitted carpet 01 to the downstream printing station. The intermediate fixed roller 30 is located in the center between the conveying traction roller 10 and the conveying push roller 20, and the knitted carpet 01 passes over the intermediate fixed roller 30.

[0026] The intermediate fixed roller 30 adopts a hollow roller body structure, with an axially oriented long groove 31 on the roller body wall. This long groove 31 covers the entire effective working width within the travel range of the moving frame 62. Two detachable fixed guide shafts 32 are provided at the two edges of the long groove 31 to guide the lifting rod assembly 66 and prevent the knitted carpet 01 from sinking into the groove. Preferably, the fixed guide shafts 32 have a detachable mounting structure. When the antibacterial treatment function is not required, the fixed guide shafts 32 can be removed and replaced with a filling strip or sealing cover plate matching the size of the long groove 31, completely sealing the long groove 31 and restoring the intermediate fixed roller 30 to a standard complete roller body structure. Thus, the intermediate fixed roller 30 can be used as a conventional transfer roller or fixed roller in other production applications. As a preferred embodiment, such as... Figure 3 As shown, the hollow roller body of the intermediate fixed roller 30 is equipped with multiple reinforcing spokes. These spokes extend radially outward from the center axis of the roller body to the inner wall of the roller body, forming a supporting skeleton. The reinforcing spokes ensure that the hollow roller body still has sufficient structural rigidity and bending strength after the long groove 31 is opened, preventing the roller body from deforming when bearing the weight of the knitted carpet 01 and the lifting force. The reinforcing spokes are preferably made of steel, with 4-8 evenly distributed spokes, to avoid obstructing the area of ​​the long groove 31 and the movement space of the guide rail 61 and the moving frame 62. The reinforcing spokes can also serve as the mounting base for the guide rail 61.

[0027] As a further preferred embodiment, the intermediate fixed roller 30 has rotation adjustment and angle locking functions. The specific structure is as follows: The bearing seats at both ends of the intermediate fixed roller 30 are rotatably mounted, allowing the roller body to rotate at any angle within a range of ±180° around its own axis. An angle scale and locking mechanism (such as a gear locking device or an electromagnetic brake) are provided at one end of the roller body.

[0028] Features and advantages: Adjusting the position of the lifting point: By rotating the intermediate fixed roller 30, the position of the long groove 31 relative to the knitted carpet 01 can be changed, thereby adjusting the relative position of the action point of the lifting rod assembly 66 on the cross-section of the knitted carpet 01 (leftward, center, or rightward). Adjusting the lifting angle: The rotating roller can change the direction of the lifting force, so that the lifting shape is adjusted from a straight lifting (vertical direction) to an oblique lifting (at a certain angle with the carpet surface), to adapt to different antibacterial agent penetration requirements; Suitable for different products: For heavy-duty carpets: the angle can be adjusted to lift them up at a larger angle to increase the fiber spread and facilitate the deep penetration of antibacterial agents; For thin carpets: gently lift them at a small angle to avoid excessive stretching that could damage the fibers; For carpets of different materials (such as pure wool, blended, and chemical fiber): by adjusting the position and angle of the raised points, the elastic modulus and deformation characteristics of different materials can be matched; Differentiated treatment by zone: In different areas of the same carpet, the angle can be adjusted to achieve localized key treatment or light treatment to meet the needs of functional zoning (such as enhanced antibacterial treatment in high-contact areas).

[0029] Operating procedure: During process adjustments, the operator releases the locking mechanism, manually or electrically rotates the roller to the target angle, and locks it after referring to the dial reading. Angle adjustments are typically made when changing product specifications or process parameters; during normal production, the roller remains locked.

[0030] The bulging forming system 60 is completely installed inside the hollow roller body of the intermediate fixed roller 30.

[0031] The bulge forming system 60 includes the following components: (1) Guide rail 61: extends along the axial direction of the intermediate fixed roller 30 and is fixed on the inner wall of the roller body to provide a motion track for the movable frame 62; (2) Moving frame 62: The linear slider cooperates with the guide rail 61 to ensure smooth movement without shaking; (3) Synchronous belt drive mechanism 63: includes a synchronous belt 631, the two ends of which are fixed to fixed points at both ends of the roller body (usually synchronous pulleys), and the middle of the synchronous belt 631 is fixedly connected to the moving frame 62. The drive motor (servo motor or stepper motor, not shown in the figure) drives the synchronous pulley to rotate through the reducer, thereby driving the synchronous belt 631 to move, and then driving the moving frame 62 to perform reciprocating linear motion along the guide rail 61. The drive motor is mounted on a fixed bracket outside the roller body; (4) Lifting drive mechanism 65: mounted on the movable frame 62, preferably using a pneumatic cylinder or an electric push rod; (5) Lifting rod assembly 66: includes a lifting rod 661 and a force transmission joint 662. The force transmission joint 662 preferably adopts a roller structure, and the lifting rod 661 is a cylindrical or frustoconical rod. The advantage of using a roller as a force transmission joint 662 is that the contact area is moderate, which can provide sufficient support force and can roll freely with the lateral movement of the moving frame 62 when in contact with the bottom surface of the knitted carpet 01, reducing frictional resistance and avoiding dragging damage or fiber tearing to the bottom of the knitted carpet 01. The lifting rod 661 passes through the long groove 31 of the intermediate fixed roller 30 from the inside of the roller body and acts on the bottom surface of the knitted carpet 01.

[0032] Working principle: The lifting drive mechanism 65 adjusts the lifting rod assembly 66 to a preset height and maintains that height. When the moving frame 62 drive system is started, the moving frame 62 drives the lifting rod assembly 66 to move along the guide rail 61. The roller-shaped force transmission joint 662 enters the working area from the starting point of the horizontal strip of the knitted carpet 01. The top rod 661 passes through the long groove 31 of the intermediate fixed roller 30, and the force transmission joint 662 lifts the knitted carpet 01 from the bottom, causing the knitted carpet 01 to be partially raised.

[0033] As the moving frame 62 moves linearly, the raised areas continuously travel along the horizontal direction of the knitted carpet 01, while the antibacterial agent application system sprays synchronously. The moving frame 62 moves linearly, and the antibacterial agent application system follows suit, continuously spraying antibacterial agent onto the raised areas. This continues until the moving frame 62 reaches the end of the horizontal strip, completing one full-width treatment. Then, the moving frame 62 returns to the starting point, and the knitted carpet 01 advances longitudinally a certain distance to process the next row. This cycle repeats, achieving continuous treatment across the entire width.

[0034] Depending on the antibacterial requirements of different knitted carpets 01, point-by-point treatment or segment-by-segment treatment can also be adopted. In point-by-point treatment, the moving frame 62 moves to a predetermined position and stops, and the antibacterial agent spray gun 02 sprays concentratedly for a certain period of time before the moving frame 62 moves to the next point. In segment-by-segment treatment, the moving frame 62 moves and sprays continuously within a set area, while other areas are not treated, thereby achieving zoned antibacterial treatment or enhanced antibacterial treatment in key areas.

[0035] Regarding antimicrobial agent application systems: like Figure 2 As shown, an antibacterial agent spray gun 02 is disposed above the first pressure roller 40 and the second pressure roller 50. The antibacterial agent spray gun 02 is mounted on an adjustable angle universal bracket, and the height of the nozzle of the antibacterial agent spray gun 02 from the surface of the knitted carpet 01 is adjustable. The antibacterial agent spray gun 02 uses an ultrasonic atomizing nozzle or a pneumatic atomizing nozzle, and the spray angle can be adjusted within a vertical downward range of ±30°.

[0036] The antibacterial agent spray gun 02 is connected to the antibacterial agent supply system, which includes a storage tank, a metering pump, a pressure regulating valve, and a flow controller to ensure that the antibacterial agent is sprayed out at a stable flow rate and pressure.

[0037] The antibacterial spray gun 02 is fixed to an external movable bracket (not shown). It moves synchronously with the movable frame 62 through a drive source, or mechanically, or through an independent follow-up mechanism to ensure that the antibacterial spray gun 02 is always aimed at the raised part.

[0038] Detailed description of the work process: Combination Figure 2 The enlarged view of the working state shown illustrates the working process of the present invention in detail: Step 1: Carpet entry and initial positioning The knitted carpet 01 is pulled into the antibacterial treatment station by the conveying traction roller 10. The upper surface of the knitted carpet 01 is pressed by the first pressure roller 40 and the second pressure roller 50, and the lower surface is in close contact with the outer surface of the middle fixed roller 30. The knitted carpet 01 is continuously conveyed at a set speed until the area to be treated reaches the working position.

[0039] Step 2: Tension Adjustment Preparation Once the knitted carpet 01 reaches the predetermined processing position, the transfer traction roller 10 stops rotating, fixing the front section of the knitted carpet 01. At this time, the transfer push roller 20 continues to rotate, pushing forward a short distance, causing the knitted carpet 01, located between the first pressure roller 40 and the second pressure roller 50, to produce an appropriate amount of local relaxation, providing the necessary margin for subsequent lifting. This tension adjustment ensures that when the lifting rod assembly 66 is in action, the knitted carpet 01 can fully lift without being restricted by excessive tension.

[0040] Step 3: Placement of the bulging device The movable frame 62 is driven by the synchronous belt 631, which moves the lifting rod assembly 66 to the starting processing position of the knitted carpet 01 banner. The lifting drive mechanism 65 has pre-adjusted the lifting rod assembly 66 to the preset working height, so that the roller-shaped force transmission joint 662 is in a standby state.

[0041] Step 4: Continuous Raising and Spraying The moving frame 62 drive system is started, and moves at a set speed along the horizontal direction at a uniform speed. The top rod 661 passes through the long groove 31 of the intermediate fixed roller 30, and the roller-shaped force transmission joint 662 applies force from the bottom surface of the knitted carpet 01 upward, causing the knitted carpet 01 to bulge locally at the contact point.

[0042] like Figure 2 As shown, the knitted carpet 01 has a cone-shaped bulge at the apex, and the fiber structure of the knitted carpet 01 undergoes three-dimensional deformation at the bulge: The surface fibers spread out to both sides at the apex of the ridge, maintaining basic integrity; The fiber network of the middle layer base fabric expands significantly due to bending, increasing the fiber gaps and fully exposing the internal channels; The bottom backing is stretched radially around the jacking point, and the gaps between the materials are widened.

[0043] As the lifting rod assembly 66 moves laterally, the raised point travels continuously along the horizontal direction, forming a dynamic raised band. At the same time, the antibacterial agent spray gun 02 moves synchronously, with the nozzle always aimed at the apex area of ​​the raised area, continuously spraying atomized antibacterial agent.

[0044] Because the knitted carpet 01 is raised, the antibacterial agent droplets do not settle directly on the flat surface, but rather penetrate deep along the raised slopes and expanded fiber channels. The antibacterial agent is mainly enriched and locked in the loose fiber network of the middle layer, with some continuing to penetrate to the bottom layer and fix in the backing material, forming a deep antibacterial barrier. The surface fibers, being at the top of the raised layer, have only a small amount of antibacterial agent adhering to them, and most remain clean.

[0045] The roller-shaped force transmission joint 662 rotates freely during movement, forming a rolling contact with the bottom surface of the knitted carpet 01 rather than sliding friction, effectively avoiding dragging damage to the bottom of the knitted carpet 01 and ensuring that the backing of the knitted carpet 01 remains intact.

[0046] Step 5: Complete one line processing The moving frame 62 continues to move until it reaches the end position of the horizontal strip of the knitted carpet 01, completing the application of antibacterial agent across the entire width. The moving frame 62 then stops moving, and the antibacterial agent spray gun 02 stops spraying.

[0047] Step 6: Carpet repositioning and longitudinal advancement After processing, the lifting drive mechanism 65 can selectively lower the lifting rod assembly 66 slightly or maintain its original height (depending on process requirements). Under the action of its own elasticity, pressure roller pressure, and material tension, the knitted carpet 01 returns to a flat state. Because the stress distribution is uniform and the action time is short during the bulging process, the fibers of the knitted carpet 01 do not undergo permanent deformation, and there are no creases on the appearance.

[0048] The transfer traction roller 10 and the transfer push roller 20 start synchronously, pushing the knitted carpet 01 forward by one longitudinal step, so that the untreated new area enters the working position.

[0049] Step 7: Return and repeat the loop The moving frame 62 quickly returns to the starting position of the banner via the synchronous belt 631 transmission system, ready to process the next row. Alternatively, steps 2 to 6 can be repeated on the return trip to complete the antibacterial treatment of the entire knitted carpet 01 row by row.

[0050] By combining continuous horizontal spraying and intermittent vertical advance, the entire knitted carpet 01 is treated with antibacterial agents to achieve full coverage. The antibacterial agent forms a uniform three-dimensional distribution network within the knitted carpet 01.

[0051] Step 8: Connection with subsequent processes The antibacterial treated knitted carpet 01 is conveyed out of the antibacterial station by the conveyor roller 20 and enters the natural air drying or low-temperature drying area. Since the antibacterial agent is mainly distributed in the middle and bottom layers of the knitted carpet 01, the surface fibers remain largely clean, and the dye affinity is unaffected. The knitted carpet 01 requires no high-temperature pretreatment and can directly enter the printing station, where the surface pattern is colored using a conventional low-temperature printing process. The printing pigments can be easily absorbed and fixed onto the surface fibers, resulting in vibrant and rich colors and clear pattern details.

Claims

1. A method for preparing a knitted printed antibacterial carpet, characterized in that, Includes the following steps: S1: Carpet entry and positioning, the knitted carpet (01) is pulled into the antibacterial treatment station by the transmission traction roller (10), the upper surface of the knitted carpet (01) is pressed by the first pressure roller (40) and the second pressure roller (50), and the lower surface is attached to the outer surface of the middle fixed roller (30). S2: Raising and forming, by applying force from the bottom surface of the knitted carpet (01) upward through the lifting rod assembly (66) set inside the intermediate fixed roller (30), the knitted carpet (01) is locally raised at the point of action. The top rod (661) of the lifting rod assembly (66) extends through the long groove (31) of the intermediate fixed roller (30), and the force transmission joint (662) contacts the bottom surface of the knitted carpet (01) and applies lifting force. S3: Synchronous spraying and transverse treatment, drive the lifting rod assembly (66) to move continuously along the horizontal direction of the knitted carpet (01) to form a dynamic raised band, and the antibacterial agent spray gun (02) moves synchronously and sprays the atomized antibacterial agent continuously at the raised part, so that the antibacterial agent penetrates deeply into the middle and bottom layers of the knitted carpet (01) along the raised fiber channel. S4: Longitudinal advancement and cyclic processing. After the lifting rod assembly (66) completes the full width processing of the horizontal band, the knitted carpet (01) returns to a flat state. The transmission traction roller (10) and the transmission push roller (20) start synchronously, advancing the knitted carpet (01) forward by one longitudinal step. The lifting rod assembly (66) returns to the starting position of the horizontal band. Repeat steps S2 to S3 until the antibacterial treatment of the entire knitted carpet (01) is completed. S5: Subsequent printing: After antibacterial treatment, the knitted carpet (01) enters the printing station for surface pattern printing; During the process of raising the fabric, the fiber structure of the knitted carpet (01) undergoes three-dimensional deformation. The surface fibers spread out to both sides at the apex of the raised area, the middle base fabric fiber network expands due to bending, and the bottom backing is stretched radially. The antibacterial agent is mainly enriched and fixed in the middle fiber network and the bottom backing, while the surface fibers remain basically clean.

2. The method for preparing the knitted printed antibacterial carpet according to claim 1, characterized in that, Between steps S1 and S2, a tension adjustment step is also included: when the knitted carpet (01) reaches the predetermined processing position, the transmission traction roller (10) stops rotating to fix the front section of the knitted carpet (01), and the transmission push roller (20) continues to push forward, so that the knitted carpet (01) located between the first pressure roller (40) and the second pressure roller (50) is partially relaxed.

3. The method for preparing the knitted printed antibacterial carpet according to claim 1, characterized in that, The force transmission joint (662) adopts a roller structure, which rolls freely with the lateral movement of the lifting rod assembly (66) when it contacts the bottom surface of the knitted carpet (01), forming rolling contact rather than sliding friction.

4. The method for preparing the knitted printed antibacterial carpet according to claim 1, characterized in that, The intermediate fixed roller (30) is a hollow roller structure, with an axially extending guide rail (61) and a movable frame (62) that cooperates with the guide rail (61) inside. The lifting rod assembly (66) is installed on the movable frame (62) and drives the movable frame (62) to reciprocate linearly along the guide rail (61) through a synchronous belt transmission mechanism (63).

5. The method for preparing the knitted printed antibacterial carpet according to claim 4, characterized in that, The synchronous belt drive mechanism (63) includes a synchronous belt (631). The two ends of the synchronous belt (631) are fixed at the fixed points at both ends of the intermediate fixed roller (30). The middle part of the synchronous belt (631) is fixedly connected to the moving frame (62). The drive motor drives the synchronous belt pulley to rotate through the reducer, thereby driving the synchronous belt (631) to move, and then driving the moving frame (62) to move along the guide rail (61).

6. The method for preparing a knitted printed antibacterial carpet according to claim 1, characterized in that, The two edges of the long groove (31) are provided with detachable fixed guide shafts (32) for guiding the lifting rod assembly (66) to move up and down and preventing the knitted carpet (01) from sinking into the groove.

7. The method for preparing a knitted printed antibacterial carpet according to claim 1, characterized in that, In step S3, one of the following treatment methods is adopted according to the antibacterial requirements of the knitted carpet (01): (1) Continuous processing: The mobile frame (62) moves continuously, and the antibacterial agent spray gun (02) sprays synchronously and continuously to complete the uniform processing of the entire width of the banner; (2) Point-by-point processing: After the mobile frame (62) moves to the predetermined position and stops, the antibacterial agent spray gun (02) sprays for a certain period of time, and then the mobile frame (62) moves to the next point; (3) Segmented treatment: The mobile frame (62) moves continuously and sprays within the set area, while no treatment is performed in other areas, so as to achieve zoned antibacterial or enhanced antibacterial treatment in key areas.

8. The method for preparing the knitted printed antibacterial carpet according to claim 1, characterized in that, The intermediate fixed roller (30) has rotation adjustment and angle locking functions. By rotating the intermediate fixed roller (30), the position of the long groove (31) relative to the knitted carpet (01) is changed, thereby adjusting the relative position of the action point of the lifting rod assembly (66) or changing the direction of the lifting force, so as to adapt to knitted carpets (01) with different materials, different thicknesses or different antibacterial requirements.

9. A preparation device for knitted printed antibacterial carpets, integrated into a knitted carpet printing production line, and set at an antibacterial treatment station before the printing station, characterized in that, include: The carpet conveying system includes a conveying traction roller (10), a conveying push roller (20), and an intermediate fixing roller (30) located below the knitted carpet (01) during operation, and a first pressure roller (40) and a second pressure roller (50) located above the knitted carpet (01) during operation. The bulging forming system (60), which is completely installed inside the hollow roller body of the intermediate fixed roller (30), includes: The guide rail (61) extends axially along the intermediate fixed roller (30) and is fixed on the inner wall of the roller body; The movable frame (62) is engaged with the guide rail (61) via a linear slider; Synchronous belt drive mechanism (63) is used to drive the moving frame (62) to reciprocate linear motion along the guide rail (61); A lifting drive mechanism (65) is mounted on a movable frame (62); The lifting rod assembly (66) includes a lifting rod (661) and a force transmission joint (662). The lifting rod (661) passes through the long groove (31) of the intermediate fixed roller (30) from the inside of the roller body and acts on the bottom surface of the knitted carpet (01). The antibacterial agent application system includes an antibacterial agent spray gun (02) and an antibacterial agent supply system. The antibacterial agent spray gun (02) is positioned above the first pressure roller (40) and the second pressure roller (50). The antibacterial agent spray gun (02) moves synchronously with the moving frame (62) to spray atomized antibacterial agent onto the raised area.

10. The apparatus for preparing knitted printed antibacterial carpet according to claim 9, characterized in that, The antibacterial agent supply system includes a storage tank, a metering pump, a pressure regulating valve, and a flow controller to ensure that the antibacterial agent is sprayed out at a stable flow rate and pressure.

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