Equipment for manufacturing hot-press spliced fabric

Abstract

The invention belongs to the technical field of intelligent textile processing equipment, and particularly relates to equipment for manufacturing a hot-press spliced fabric. Comprising a base, a bracket, a Y-direction linear guide rail, a rotatable chip mounting execution unit (comprising a vertical rotating shaft and a chip mounting head), a working bearing platform driven by an X-direction ball screw, and a hot pressing device positioned right above the working bearing platform, the surface mounting execution unit can translate in the Y direction and rotate around a vertical axis to match the contour of the substrate layer; the working bearing platform is accurately transferred to a hot pressing station in the X direction; the whole machine structure is specially designed for a composite patch which sequentially comprises a TPU layer, a yarn reinforcing layer and a double-sided pressure-sensitive adhesive layer from top to bottom, so that the consistency of the cold-patch fitting degree and the hot-pressing packaging is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of intelligent textile processing equipment technology, specifically relating to a device for producing hot-pressed spliced ​​fabrics. Background Technology

[0002] In the fields of clothing, bags, outdoor sports equipment, and special functional products, splicing is often necessary on base fabrics to achieve purposes such as localized reinforcement, decoration, waterproofing, or structural bonding. Traditional splicing methods mainly rely on sewing, which connects two or more pieces of fabric with stitching. However, sewing has inherent drawbacks: for example, needle holes disrupt the continuity of the fabric, leading to a decrease in its waterproof and windproof performance, making it prone to leakage in outdoor or rainy / snowy environments. Furthermore, the seam itself can become a structural weak point, easily worn and broken under long-term stress or friction.

[0003] Among them, sewing technology is highly mature, but it inevitably creates raised stitches, affecting wearing comfort and appearance flatness; although hot melt adhesive film pressing can achieve stitchless splicing, the adhesive film is mostly a homogeneous film, which lacks the ability to adapt to the yarn structure, resulting in stiffness and reduced breathability in the splicing area. Summary of the Invention

[0004] This invention discloses a device for producing hot-pressed spliced ​​fabrics, which mainly solves the problem of achieving seamless, high-strength, and high-flatness splicing between two base layers without damaging the original texture and feel of the fabric. It overcomes the defects of traditional sewing seams, glued seams, and existing bonding equipment that cannot adapt to composite patches containing yarn textures, such as positioning deviation, interlayer slippage, and poor interface bonding.

[0005] To achieve the aforementioned objective, the present invention provides a device for manufacturing hot-pressed spliced ​​fabrics, comprising a base and a bracket fixedly mounted on the base. The device is characterized in that: the bracket is provided with a linear guide rail extending along the Y direction; a patching execution unit is slidably mounted on the linear guide rail, the patching execution unit comprising a mounting base, a rotating shaft, a drive motor, and a patching head; the rotating shaft is vertically arranged, one end of which is rotatably connected to the mounting base, and the other end is fixedly connected to the patching head; the drive motor drives the rotating shaft to rotate around its own axis; a working platform is also rotatably mounted on the base, the bottom of which is connected to a ball screw pair arranged along the X direction, the ball screw pair being driven by a servo motor to reciprocate the working platform along the X direction; a hot-pressing device is provided above the bracket, located directly above the working platform; the device is adapted to composite layer patches comprising, from top to bottom, a thermoplastic polyurethane (TPU) layer, a yarn reinforcement layer, and a pressure-sensitive adhesive layer.

[0006] Preferably, the rotation range of the rotating axis of the patch execution unit is 0° to ±45°, and the minimum rotation step is 0.02°.

[0007] Preferably, the X-direction travel of the working platform is 0–500 mm, and the positioning repeatability is ±0.03 mm.

[0008] Preferably, the carrier of the double-sided pressure-sensitive adhesive layer is a polyethylene terephthalate (PET) film or a polyimide (PI) film with a thickness of 0.05–0.12 mm. Preferably, a hot pressing device is also provided above the base. Preferably, the working platform is further provided with a heating module, the surface temperature uniformity of the heating area is ≤±1.5℃.

[0009] Preferably, the controllable temperature heating unit of the working platform is configured to preheat the base layer to 65–75°C for 30–60 seconds, and the time interval between the end of preheating and the start of hot pressing is ≤2 seconds.

[0010] Preferably, an integrated hot-pressing mechanism is further provided above the base, the integrated hot-pressing mechanism comprising: A pressure drive assembly, and a heat-pressed plate connected to the pressure drive assembly; The hot-pressed plate is equipped with heating elements and temperature detection elements, enabling it to simultaneously perform pressurization and heating functions.

[0011] Preferably, the side of the pressure-sensitive adhesive layer away from the yarn reinforcement layer is provided with release paper or release film.

[0012] The technical solution provided by this invention has at least the following technical effects: The linear guide rail extending along the Y direction on the bracket enables precise longitudinal sliding positioning of the placement unit, thereby ensuring the movement accuracy of the placement head in the Y-axis direction; Based on the structure of the placement unit slidably mounted on the linear guide rail, the unit includes a vertically arranged rotating shaft, one end of which is rotatably connected to the mounting base while the other end is fixedly connected to the placement head. A drive motor drives the rotating shaft to rotate around its own axis, allowing the placement head to dynamically adjust its angle during operation to adapt to different splicing paths; Furthermore, a working bearing platform is rotatably mounted on the base... The platform reciprocates via a ball screw assembly arranged along the X-axis and connected at the bottom. This ball screw assembly is driven by a servo motor, forming an XY dual-axis linkage system that significantly improves the two-dimensional positioning capability of the patch. Next, a hot-pressing device located directly above the work platform on the support frame integrates the patching and hot-pressing processes into the same equipment, avoiding positioning offsets caused by workstation transfers. Finally, the equipment is adapted to patching composite layers consisting of a thermoplastic polyurethane (TPU) layer, a yarn reinforcement layer, and a pressure-sensitive adhesive layer, arranged sequentially from top to bottom. The pressure-sensitive adhesive layer is in a flowing state during hot pressing, effectively filling the gaps in the fabric texture on the base layer surface. This design improves upon the seam misalignment problem caused by positioning deviations in traditional splicing processes, while also solving the technical challenge of gaps or uneven surfaces at the interface after hot pressing, resulting in spliced ​​fabrics with a flat lower surface and a robust structure. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 This is a cross-sectional view of the composite sheet of Embodiment 1 of the present invention; Key reference numerals: 10, base; 20, bracket; 21, linear guide; 22, patch actuation unit; 30, working platform; 40, thermoplastic polyurethane (TPU) layer; 41, yarn reinforcement layer; 42, pressure-sensitive adhesive layer; Detailed Implementation Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0014] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0015] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0016] Example 1: like Figure 1 , Figure 2 As shown, an apparatus for producing hot-pressed spliced ​​fabrics includes a base and a bracket fixedly mounted on the base. The bracket has a linear guide rail extending along the Y direction. A patching execution unit is slidably mounted on the linear guide rail. The patching execution unit includes a mounting base, a rotating shaft, a drive motor, and a patching head. The rotating shaft is vertically positioned, with one end rotatably connected to the mounting base and the other end fixedly connected to the patching head. The drive motor drives the rotating shaft to rotate around its own axis. A working platform is also rotatably mounted on the base. A ball screw pair arranged along the X direction is connected to the bottom of the working platform. The ball screw pair is driven by a servo motor, causing the working platform to reciprocate along the X direction. A hot-pressing device is located above the bracket, directly above the working platform. The apparatus is adapted to patching composite layers consisting of a thermoplastic polyurethane (TPU) layer, a yarn reinforcement layer, and a pressure-sensitive adhesive layer, arranged sequentially from top to bottom.

[0017] The support frame is a rigid metal frame structure, which can be made of aluminum alloy or stainless steel. It is fastened to the base with bolts to ensure the overall structural stability. The linear guide is a high-precision ball linear guide, which is arranged along the Y-axis. The guide has travel limit switches at both ends to limit the movement range of the placement unit in the Y direction. The mounting base of the placement unit is slidably connected to the linear guide through a slider. The slider has pre-tightened balls inside to reduce movement backlash and improve repeatability. The rotary axis is a hollow stepped shaft structure, and its axis is perpendicular to the vertical direction. The mounting head is rotatably connected to the mounting base at one end via a deep groove ball bearing, and fixedly connected to the placement head at the other end via a key or interference fit. The drive motor is a stepper motor or servo motor, and its output shaft is coaxially connected to the rotating shaft via a coupling. The motor housing is fixed to the mounting base, and the motor control signal is provided by the main control system of the equipment. The rotation angle adjustment range is 0° to ±45°, and the minimum rotation step is 0.02° to meet the placement posture adjustment requirements under different splicing paths. The structure and working principle of the placement head are existing technologies and will not be described in detail here.

[0018] The working platform has a circular or rectangular table structure, and the table material can be aluminum alloy, electroplated steel plate, or ceramic-coated metal plate. Its bottom is fixedly connected to the nut seat of the ball screw pair via a flange. The ball screw pair consists of a precision-ground ball screw, a double-nut preloaded nut seat, and a support bearing. The screw axis is arranged horizontally along the X direction. One end is driven by a servo motor via a synchronous pulley, and the other end is supported by an angular contact bearing. The servo motor is a closed-loop control motor with encoder feedback. Together with a grating ruler or magnetic grating ruler, it forms a fully closed-loop position control system, enabling the working platform to move 0–500 mm in the X direction with a positioning repeatability of ±0.03 mm. The working platform can rotate freely 360° around its central axis. The rotation is driven by an independent rotary servo motor to adapt to the needs of multi-angle splicing operations. The composite layer patch adapted to the equipment consists of, from top to bottom, a thermoplastic polyurethane (TPU) layer, a yarn reinforcement layer, and a pressure-sensitive adhesive layer. The TPU layer is a transparent or semi-transparent elastic film with a thickness of 0.08 μm. It softens and melts during hot pressing, wrapping around the yarn reinforcement layer. The yarn reinforcement layer is composed of polyester, nylon, or aramid monofilament or multi-ply twisted yarn with a linear density of 20–150 tex. The warp and weft arrangement density can be set according to the splicing strength requirements, for example, 10–30 yarns per centimeter. This layer is encapsulated between the TPU layer and the pressure-sensitive adhesive layer, forming a mechanical anchoring structure after hot pressing and curing. The carrier of the pressure-sensitive adhesive layer is... The polyethylene terephthalate (PET) film, with a thickness of 0.05 μm, has at least one side coated with an acrylic or silicone pressure-sensitive adhesive with a thickness of 15–50 μm. It is initially tacky under preheating conditions of 65–75°C and transitions to a fluid state under hot-pressing temperatures (80–160°C). This allows it to penetrate the yarn reinforcement layer upwards and form an interfacial diffusion bond with it, while simultaneously filling the voids in the fabric texture of the base layer downwards, achieving mechanical interlocking at the microscopic level. The side of the pressure-sensitive adhesive layer away from the yarn reinforcement layer is covered with a peelable release paper with a release force of 20–80 g / 25 mm, facilitating storage, transportation, and protective peeling before application.

[0019] The core innovation lies in constructing a dedicated equipment architecture based on an XY two-dimensional precision motion platform, supplemented by an adjustable placement head angle and an integrated hot pressing station. Through the sliding positioning of the placement execution unit on the Y-axis guide rail, the high repeatability translation of the working platform driven by the X-axis ball screw pair, and the fine angle adjustment of the placement head within a ±45° range driven by the rotary axis, the three work together to form a flexible and highly adaptable composite placement capability. On this basis, the hot pressing device is directly integrated above the working platform, so that the placement and hot pressing processes are closely connected in space, avoiding positional deviations and temperature attenuation introduced by manual transfer, thereby ensuring the synchronous response and collaborative forming of the TPU layer and the pressure-sensitive adhesive layer under thermal action.

[0020] In this embodiment, the rotation range of the mounting unit's rotating axis is 0° to ±45°, and the minimum rotation step is 0.02°. The X-direction travel of the work platform is 0–500 mm, and the positioning repeatability is ±0.03 mm.

[0021] The working process and principle are as follows: After the equipment is started, the working platform first moves to the patching station, and the two base layer fabrics to be spliced ​​are placed on the working platform. The patching execution unit slides along the Y-direction guide rail to the preset starting position, and the drive motor controls the rotating shaft to drive the patching head to rotate to the target angle. Subsequently, the patching execution unit moves precisely along the Y-direction to the seam area of ​​the two fabrics to be spliced ​​under the drive of the servo motor. The patching head descends to complete the attachment, and the composite layer patch is bridging the seam. In subsequent processing, the spliced ​​fabric can be subjected to a hot pressing process. Under the set temperature and pressure, the TPU layer begins to melt and flow downward to wrap the yarn reinforcement layer. The pressure-sensitive adhesive layer is activated by heat, on the one hand, it impregnates the yarn reinforcement layer upward to form a chemical and physical combination, and on the other hand, it penetrates downward into the fiber gaps of the base layer and fills the fabric texture. After cooling and shaping, the three are fused into a dense composite layer structure.

[0022] The above technical solution achieves the following beneficial effects: Because the support is equipped with a linear guide rail extending along the Y direction, and the patching execution unit is slidably mounted on this guide rail, high-precision and repeatable positioning of the patching head in the longitudinal direction is achieved, improving the longitudinal positional accuracy of the composite layer patch within the seam area; Since the patching execution unit includes a vertically arranged rotating shaft and a drive motor, with one end of the rotating shaft rotatably connected to the mounting base and the other end fixedly connected to the patching head, the patching head can be angled within a range of ±45°, allowing it to adapt to fabric splicing paths with different orientations, thus enhancing the equipment's adaptability to irregular splicing tasks; A ball screw pair arranged along the X direction is connected to the bottom of the working platform and is driven by a servo motor to achieve reciprocating movement. Therefore, together with the Y guide rail, it forms an XY two-dimensional precision positioning system, which greatly expands the coverage of the patching operation and ensures the repeatability accuracy of the patch position. Since the equipment is specifically designed to process composite layer patches consisting of a TPU layer, a yarn reinforcement layer and a pressure-sensitive adhesive layer from top to bottom, and the material parameters and thermal response characteristics of each layer are matched with each other, the TPU layer can effectively wrap the yarn and the pressure-sensitive adhesive layer can fully fill the texture of the base layer and achieve deep integration during the hot pressing process, ultimately forming a flat, firm, aesthetically pleasing and functional splicing interface.

[0023] Example 2: According to another embodiment of the present invention, in this embodiment, a hot pressing device is further provided above the base. The working platform is also equipped with a heating module, the surface temperature uniformity of which is ≤±1.5℃. The controllable temperature heating unit of the working platform is configured to preheat the base layer to 65–75℃ for 30–60s, and the time interval between the end of preheating and the start of hot pressing is ≤2s.

[0024] An integrated hot-pressing mechanism is also provided above the base, the integrated hot-pressing mechanism comprising: A pressure drive assembly, and a heat-pressed plate connected to the pressure drive assembly; The hot-pressed plate is internally equipped with heating elements and temperature sensing elements, enabling it to simultaneously perform pressurization and heating functions. The hot-pressing device is an integrated hot-pressing mechanism, including a pressurization drive assembly and a hot-pressed plate connected to the pressurization drive assembly. The pressurization drive assembly uses a pneumatic-hydraulic booster cylinder or a servo electric cylinder, with a maximum output pressure of 0.5–5 MPa, a pressurization stroke of 0–20 mm, and a controllable accuracy of ±0.01 mm. The hot-pressed plate has a flat plate structure, with uniformly distributed heating elements and multiple temperature sensing elements embedded inside. The heating element can be a resistance wire, a PTC ceramic heating element, or a thin film heating film. The temperature sensing element is a platinum resistance thermometer (Pt100) or a type K thermocouple. The surface temperature control range of the hot-pressed plate is 80–160℃, the temperature control accuracy is ±1℃, and the surface temperature uniformity is ≤±1.5℃. The hot-pressing device is suspended above the support frame by a column or gantry frame. Its front projection area completely covers the effective working surface of the working platform and has a vertical lifting function. The lifting is controlled by an independent drive mechanism to achieve accurate alignment before hot pressing and rapid return after hot pressing.

[0025] In this embodiment, after the patch is applied, the entire working platform is moved along the X direction to the hot pressing station. At this time, the hot pressing device moves downward, and the hot pressing plate presses the composite layer patch together, while heating and pressurization are started simultaneously. Since the hot pressing device is located directly above the working platform above the support, the patch can directly enter the hot pressing process without manual transfer after application, avoiding temperature loss and positional shift, and ensuring the synchronous response and collaborative forming of the TPU layer and pressure-sensitive adhesive layer under thermal action. The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An apparatus for producing hot-pressed spliced ​​fabric, comprising a base (10) and a bracket (20) fixedly mounted on the base (10), characterized in that: The bracket (20) is provided with a linear guide rail (21) extending in the Y direction; a patch execution unit (22) is slidably mounted on the linear guide rail (21), the patch execution unit (22) includes a mounting base, a rotating shaft, a drive motor and a patch head, the rotating shaft is vertically arranged, one end is rotatably connected to the mounting base and the other end is fixedly connected to the patch head, the drive motor is used to drive the rotating shaft to rotate around its own axis; a working bearing platform (30) is also rotatably arranged on the base (10), the bottom of the working bearing platform (30) is connected to a ball screw pair arranged in the X direction, the ball screw pair is driven by a servo motor, so that the working bearing platform (30) moves back and forth in the X direction; a hot pressing device is provided above the bracket (20), the hot pressing device is located directly above the working bearing platform (30); the device is adapted to a composite layer patch including a thermoplastic polyurethane (TPU) layer (40), a yarn reinforcement layer (41) and a pressure-sensitive adhesive layer (42) from top to bottom.

2. The equipment for producing hot-pressed spliced ​​fabrics according to claim 1, characterized in that: The rotation range of the rotation axis of the patch execution unit (22) is 0° to ±45°, and the minimum rotation step is 0.02°.

3. The equipment for producing hot-pressed spliced ​​fabrics according to claim 1, characterized in that: The X-direction travel of the work platform (30) is 0–500 mm, and the positioning repeatability is ±0.03 mm.

4. The equipment for producing hot-pressed spliced ​​fabrics according to claim 1, characterized in that: The carrier of the double-sided pressure-sensitive adhesive layer (42) is a polyethylene terephthalate (PET) film or a polyimide (PI) film with a thickness of 0.05–0.12 mm.

5. The equipment for producing hot-pressed spliced ​​fabrics according to claim 1, characterized in that: A hot pressing device is also provided above the base (10).

6. The equipment for producing hot-pressed spliced ​​fabrics according to claim 5, characterized in that: The working platform (30) is also equipped with a heating module, and the surface temperature uniformity of its heating area is ≤±1.5℃.

7. The equipment for producing hot-pressed spliced ​​fabrics according to claim 6, characterized in that: The temperature-controlled heating unit of the working platform (30) is configured to preheat the base layer to 65–75°C for 30–60 seconds, and the time interval between the end of preheating and the start of hot pressing is ≤2 seconds.

8. The equipment for producing hot-pressed spliced ​​fabrics according to claim 6, characterized in that: An integrated hot pressing mechanism is also provided above the base (10), the integrated hot pressing mechanism comprising: A pressure drive assembly, and a thermoplastic plate connected to the pressure drive assembly; The hot-pressed plate is equipped with heating elements and temperature detection elements, enabling it to perform both pressurization and heating functions simultaneously.

9. The equipment for producing hot-pressed spliced ​​fabrics according to claim 1, characterized in that: The pressure-sensitive adhesive layer (42) is provided with release paper or release film on the side away from the yarn reinforcement layer (41).

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