PU synthetic leather embossing cylinder device
By introducing a three-point stable support structure into the PU synthetic leather embossing device, the problems of low embossing accuracy and high frictional resistance are solved, achieving stable adaptation to leathers of different thicknesses and high-quality embossing effects.
Patent Information
- Application Number
- CN202521614295.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-31
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-07-31
AI Technical Summary
Existing PU synthetic leather embossing devices suffer from inaccurate embossing position, pattern deformation, low embossing precision, unstable contact, high frictional resistance, and difficulty in adapting to leathers of different thicknesses when the leather thickness fluctuates or the conveying is offset. They are also prone to scratching the leather.
It adopts a three-point stable support structure, including a mounting base, parallel embossing rollers, and an auxiliary wheel below. A spring tensioning mechanism keeps the auxiliary wheel in close contact with the embossing rollers, forming a stable support that can adapt to leathers of different thicknesses and reduce frictional resistance.
It improves embossing precision and consistency, prevents leather shifting, reduces frictional resistance, ensures a smooth embossing process, and enhances product quality.
Smart Images
Figure CN224678412U_ABST
Abstract
Description
Technical Field
[0001] This utility model provides a roller device, and particularly relates to a PU synthetic leather embossing roller device. Background Technology
[0002] The PU synthetic leather embossing roller device is a key piece of equipment in the leather processing industry used to press preset patterns on the surface of PU synthetic leather, thereby improving the appearance, texture and functionality of the product. Through the mechanical extrusion of the embossing roller, it forms decorative or functional patterns on the leather surface. It is widely used in industries such as footwear, bags, and furniture, and directly affects the market competitiveness of PU synthetic leather products.
[0003] Existing PU synthetic leather embossing devices typically include a mounting frame and a pair of parallel embossing rollers. The two rollers are rotatably mounted on the frame, forming a gap for the leather to pass through. Embossing is achieved by squeezing the leather through the relative rotation of the rollers. However, such devices have significant shortcomings: relying solely on the squeezing of the two rollers for positioning can easily lead to inaccurate embossing positions, pattern deformation, and low embossing accuracy when there are fluctuations in leather thickness or slight offsets during transport. Furthermore, the contact stability between the rollers and the leather is insufficient, especially for leathers of different thicknesses, making it difficult to maintain uniform pressure through rollers with a fixed gap, affecting embossing consistency. In addition, most devices lack an elastic adjustment structure, making it impossible to adapt to changes in leather thickness. Some auxiliary positioning structures have high frictional resistance with the rollers, which may cause scratches on the leather surface, further limiting the improvement of embossing effects. Utility Model Content
[0004] In order to solve the above problems, this application provides a PU synthetic leather embossing roller device, which solves the problems of embossing deviation caused by unstable leather positioning, poor adaptability to leathers of different thicknesses, loose contact and high frictional resistance, thereby improving embossing accuracy and consistency.
[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a PU synthetic leather embossing roller device, comprising:
[0006] Mounting base: It has a frame-type load-bearing structure, providing overall installation support;
[0007] A pair of embossing rollers: parallel and rotatably mounted in the middle area of the mounting base, the axes of the two embossing rollers are parallel to each other, and an embossing gap is formed between them for PU synthetic leather to pass through;
[0008] Auxiliary wheel: Rotatably mounted within the mounting base and located in the area below the pair of embossing rollers;
[0009] Spring tensioning mechanism: includes an elastic spring, one end of which is connected to the axle of the auxiliary wheel, and the other end is fixedly connected to the side wall of the mounting base. The elastic spring applies tension to the auxiliary wheel, so that the outer peripheral surface of the auxiliary wheel is tightly attached to the outer peripheral surface of the pair of embossing rollers. The auxiliary wheel and the pair of embossing rollers together form a three-point stable support structure.
[0010] Preferably, the mounting base includes a rectangular frame and symmetrically arranged side walls. The side walls are provided with bearing holes for mounting the embossing roller and hook parts for connecting the spring tensioning mechanism.
[0011] Preferably, the embossing roller is rotatably mounted in the bearing hole on the side wall of the mounting base via a rolling bearing, the roller axes of the two embossing rollers are parallel, and the roller surface spacing is adapted to the thickness of the PU synthetic leather.
[0012] Preferably, the two ends of the axle of the auxiliary wheel are slidably connected to the longitudinal groove opened in the side wall of the mounting base, and the elastic spring of the spring tensioning mechanism pulls the axle to make the auxiliary wheel elastically fit along the groove towards the embossing roller.
[0013] Preferably, the spring tensioning mechanism further includes a connecting seat fixed to the side wall of the mounting base, one end of the elastic spring is hooked to the connecting seat, and the other end is hooked to the axle of the auxiliary wheel, forming an elastic tensioning structure.
[0014] Preferably, in the three-point stable support structure, the outer peripheral surface of the auxiliary wheel simultaneously contacts the outer peripheral surfaces of the pair of embossing rollers, with the contact points located in the lower area of the two embossing rollers, thus forming a three-point limit when the PU synthetic leather is inserted.
[0015] Preferably, the elastic spring is a helical tension spring, and the auxiliary wheel is a cylindrical roller with a smooth arc surface on its outer circumference to reduce frictional resistance with the embossing roller.
[0016] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages compared with the prior art:
[0017] This device primarily addresses the problems of low embossing accuracy and pattern misalignment caused by unstable positioning of the leather between the embossing rollers during the existing PU synthetic leather embossing process, as well as the poor adaptability of the embossing mechanism to leathers of different thicknesses and the impact of loose contact on the embossing effect. It solves these problems by placing a pair of parallel embossing rollers within the mounting base to form an embossing gap, and simultaneously placing an auxiliary wheel below the embossing rollers. A spring tensioning mechanism applies tension to the auxiliary wheel, ensuring it fits tightly against the two embossing rollers to form a three-point stable support structure. This achieves three-point positioning of the threaded PU synthetic leather, enhancing the stability of the leather during the embossing process. Furthermore, the auxiliary wheel is slidably connected to the longitudinal groove of the mounting base via an axle, and with the elastic adjustment of the helical tension spring, it can adapt to leathers of different thicknesses and maintain stable contact. The smooth, rounded surface of the auxiliary wheel also reduces frictional resistance with the embossing rollers, ensuring a smooth embossing process, thereby improving embossing accuracy and consistency.
[0018] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description
[0019] Figure 1 This is a three-dimensional schematic diagram of a PU synthetic leather embossing roller device according to the present invention;
[0020] Figure 2 This is an exploded view of a PU synthetic leather embossing roller device according to the present invention;
[0021] Figure 3 This is an exploded view of the pressure roller portion of a PU synthetic leather embossing roller device according to this utility model;
[0022] Figure 4 This is a partial enlarged view of the spring tensioning part of a PU synthetic leather embossing roller device according to this utility model.
[0023] As shown in the figure:
[0024] 1. Mounting base; 2. Embossing roller; 3. Auxiliary wheel; 4. Spring tensioning mechanism; 41. Elastic spring. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.
[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0028] like Figure 1 and Figure 2 As shown, a PU synthetic leather embossing roller device includes a frame-type support structure mounting base 1 (including a rectangular frame and symmetrically arranged two side walls, the side walls having bearing holes for mounting embossing rollers 2 and a hook part for connecting a spring tensioning mechanism 4); a pair of embossing rollers 2 parallel and rotatably mounted in the middle area of the mounting base 1 (assembled in the bearing holes of the side walls through rolling bearings, the axes of the two embossing rollers 2 are parallel to each other, and the roller surface spacing is adapted to the thickness of PU synthetic leather to form a through gap); an auxiliary wheel 3 rotatably mounted in the mounting base 1 and located in the area below the embossing rollers 2; and a spring tensioning mechanism 4 containing an elastic spring 41 (one end of the elastic spring 41 is connected to the axle of the auxiliary wheel 3, and the other end is fixed to the side wall of the mounting base 1, so that the outer peripheral surface of the auxiliary wheel 3 is tightly attached to the embossing roller 2, together forming a three-point stable support structure).
[0029] In this embodiment, the mounting base 1 is a frame-type load-bearing structure. Its rectangular frame and symmetrical sidewalls form an overall support frame. The bearing holes in the sidewalls are used to install a pair of embossing rollers 2, and the hook-on part provides a connection point for the spring tensioning mechanism 4. The pair of embossing rollers 2 are mounted in parallel rotation in the middle of the mounting base 1 through rolling bearings. The axes of the two rollers are parallel and form an embossing gap adapted to the thickness of PU synthetic leather. The auxiliary wheel 3 is rotatably mounted in the mounting base 1 and located below the embossing rollers 2. Its wheel axle is slidably connected to the longitudinal groove of the sidewall. The elastic spring 41 of the spring tensioning mechanism 4 is a helical tension spring. One end is hooked to the connecting seat of the sidewall of the mounting base 1, and the other end is hooked to the wheel axle of the auxiliary wheel 3. By pulling the wheel axle, the auxiliary wheel 3 is elastically attached to the embossing rollers 2 along the groove. Finally, the outer circumference of the cylindrical smooth arc surface of the auxiliary wheel 3 contacts the outer circumference of the lower area of the two embossing rollers 2, forming a three-point stable support structure. The above-mentioned structural combination achieves precise positioning of PU synthetic leather through three-point stable support, solving the offset problem caused by the traditional device relying solely on two embossing rollers for positioning. The sliding of the auxiliary wheel 3 along the groove, combined with the elastic adjustment of the spring tensioning mechanism 4, can adapt to leathers of different thicknesses and maintain stable contact, overcoming the poor adaptability of the fixed gap structure. The elastic force of the spiral tension spring ensures uniform contact pressure, and together with the smooth arc surface of the auxiliary wheel 3, it significantly reduces the frictional resistance with the embossing roller 2, avoiding scratches on the leather and ensuring a smooth embossing process. Overall, it improves the embossing accuracy and product consistency, highlighting its significant advantages in stability, adaptability, and smooth operation compared to existing devices.
[0030] like Figure 3 and Figure 4 As shown, the two ends of the axle of the auxiliary wheel 3 are slidably connected to the longitudinal groove opened in the side wall of the mounting base 1. The spring tensioning mechanism 4 drives the auxiliary wheel 3 to elastically fit along the groove towards the embossing roller 2 by pulling the axle. The spring tensioning mechanism 4 also includes a connecting seat fixed to the side wall of the mounting base 1. The two ends of the elastic spring 41 are hooked to the connecting seat and the axle of the auxiliary wheel 3 respectively, forming an elastic tensioning structure. In the three-point stable support structure, the outer circumferential surface of the auxiliary wheel 3 simultaneously contacts the lower area of a pair of embossing rollers 2, realizing three-point limiting when the PU synthetic leather is inserted. The elastic spring 41 is a helical tension spring, and the auxiliary wheel 3 is a cylindrical roller with a smooth arc surface on its outer circumference to reduce the frictional resistance with the embossing roller 2.
[0031] In this embodiment, the axle of the auxiliary wheel 3 is slidably connected to the longitudinal groove on the side wall of the mounting base 1, providing precise guidance for the displacement of the auxiliary wheel 3 and ensuring that it always moves closer to the embossing roller 2 along the preset trajectory, avoiding unstable contact due to deviation; the connecting seat of the spring tensioning mechanism 4 provides a stable fixed support for the elastic spring 41, and with the hook structure at both ends, it ensures the effective transmission of elastic tension and facilitates the installation and replacement of the spring; the elastic spring 41 adopts a helical tension spring, and its linear elasticity characteristics can keep the contact pressure of the auxiliary wheel 3 on the embossing roller 2 uniform and stable, adapting to the pressure self-adjustment when the leather thickness fluctuates; auxiliary The smooth arc design and cylindrical structure of the outer circumference of wheel 3 ensure close contact with the lower area of embossing roller 2 while minimizing friction on the contact surface, reducing interference with the rotation of embossing roller 2 and wear on the leather surface. The contact position between the auxiliary wheel 3 and the lower side of embossing roller 2 in the three-point stable support can lift the leather from below, forming a three-dimensional limit with the squeezing of embossing roller 2, effectively preventing the leather from shifting due to gravity during transportation. This solves the problem of loose positioning that is easily caused by traditional devices that rely solely on upper and lower squeezing. Through the synergistic effect of structural details, the operational stability of the device and the consistency of embossing quality are further improved.
[0032] In actual use, this device requires a drive mechanism (such as a servo motor and gear transmission mechanism) to provide rotational power to a pair of embossing rollers 2. Synchronous reverse rotation is achieved by meshing the motor output shaft with the gear at the end of the roller shaft of the embossing rollers 2. A leather conveying mechanism (such as a guide roller group or conveyor belt) is also needed to smoothly feed the PU synthetic leather to be embossed into the embossing gap and to remove the embossed leather. Simultaneously, a control system (such as a PLC controller and sensors) is required to monitor the embossing speed and pressure in real time, ensuring stable embossing results by adjusting the drive motor speed and the preload of the spring tensioning mechanism 4. Furthermore, to ensure… To ensure operational safety, protective covers and other safety components are typically included. The mounting base 1 can be welded from gray cast iron HT250 or Q235 steel plates, providing sufficient load-bearing strength. The embossing roller 2 can be made of 45# steel, heat-treated and then chrome-plated, ensuring both hardness and improved wear resistance. The auxiliary wheel 3 can be made of polyurethane rubber or MC nylon, combining elasticity and wear resistance. The elastic spring 41 can be made of 65Mn spring steel, ensuring stable elasticity under long-term tension. These existing technologies and the core structure of this device work together to form a complete PU synthetic leather embossing production line.
[0033] Specifically, during the actual installation of this device, the mounting base 1 needs to be fixed to the frame of the leather production line using anchor bolts, as is done in the existing technology, to ensure the overall structural stability. Deep groove ball bearings (such as model 6205) are used as the rotating connecting parts between the embossing roller 2 and the auxiliary wheel 3. The inner ring of the bearing has an interference fit with the roller shaft, and the outer ring has a clearance fit with the bearing hole of the mounting base 1. Axial positioning is achieved through the bearing seat end cap. In use, the rolled PU synthetic leather (such as 0.5-2mm thick polyester PU leather) needs to be unwound using an unwinding device (such as a pneumatic tension-controlled unwinding machine), smoothed by the guide rollers, and then fed into the embossing gap. The drive device uses a servo motor (such as a 1.5kW AC servo motor) connected to the end of the roller shaft of the embossing roller 2 via a reduction gearbox. The motor output shaft drives the two embossing rollers 2 to rotate synchronously in opposite directions at a speed of 5-10m / min via a gear reducer (transmission ratio 1:5). Simultaneously, the spring tensioner is manually adjusted. The initial tension of the elastic spring 41 (a 65Mn helical spring with a wire diameter of 2mm and a free length of 100mm) is preset at the position of the connecting seat in structure 4 (such as the adjusting bolt on the rotating connecting seat). During operation, the position of the leather edge is detected by an infrared sensor in the prior art. If a deviation occurs, an alarm device is triggered. The operator can correct it by adjusting the correction roller of the conveying mechanism. After embossing is completed, the leather is wound up by a winding device in the prior art (such as a magnetic powder brake winding machine). During this period, the chrome-plated surface of the embossing roller 2 (chrome plating thickness 0.05-0.1mm) and the polyurethane surface of the auxiliary wheel 3 (hardness 60-70 Shore A) need to be cleaned regularly. Anhydrous ethanol is used to wipe away residual leather debris. At the same time, lithium-based grease (model GB / T7324-2010) is added to the rolling bearing to reduce wear. Through the cooperation of these prior art means with the core structure of this device, a complete PU synthetic leather embossing production process is formed.
[0034] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.
Claims
1. A PU synthetic leather embossing roller device, characterized in that, include: Mounting base (1): It has a frame-type load-bearing structure, providing overall installation support; A pair of embossing rollers (2): parallel and rotatably mounted in the middle area of the mounting base (1), the axes of the two embossing rollers (2) are parallel to each other, and an embossing gap is formed between them for PU synthetic leather to pass through; Auxiliary wheel (3): Rotatably mounted in the mounting base (1) and located in the area below the pair of embossing rollers (2); Spring tensioning mechanism (4): includes an elastic spring (41), one end of which is connected to the axle of the auxiliary wheel (3), and the other end is fixedly connected to the side wall of the mounting base (1). The elastic spring (41) applies tension to the auxiliary wheel (3), so that the outer circumferential surface of the auxiliary wheel (3) is tightly attached to the outer circumferential surface of the pair of embossing rollers (2). The auxiliary wheel (3) and the pair of embossing rollers (2) together form a three-point stable support structure.
2. The PU synthetic leather embossing roller device according to claim 1, characterized in that, The mounting base (1) includes a rectangular frame and two symmetrically arranged side walls. The side walls are provided with bearing holes for mounting the embossing roller (2) and a hook part for connecting the spring tensioning mechanism (4).
3. The PU synthetic leather embossing roller device according to claim 1, characterized in that, The embossing roller (2) is rotatably mounted in the side wall bearing hole of the mounting base (1) via a rolling bearing. The roller axes of the two embossing rollers (2) are parallel, and the roller surface spacing is adapted to the thickness of the PU synthetic leather.
4. The PU synthetic leather embossing roller device according to claim 1, characterized in that, The two ends of the axle of the auxiliary wheel (3) are slidably connected to the longitudinal groove opened on the side wall of the mounting base (1). The elastic spring (41) of the spring tensioning mechanism (4) pulls the axle, so that the auxiliary wheel (3) elastically fits along the groove towards the embossing roller (2).
5. The PU synthetic leather embossing roller device according to claim 1, characterized in that, The spring tensioning mechanism (4) also includes a connecting seat fixed to the side wall of the mounting base (1). One end of the elastic spring (41) is hooked to the connecting seat, and the other end is hooked to the axle of the auxiliary wheel (3), forming an elastic tensioning structure.
6. The PU synthetic leather embossing roller device according to claim 1, characterized in that, In the three-point stable support structure, the outer peripheral surface of the auxiliary wheel (3) simultaneously contacts the outer peripheral surface of the pair of embossing rollers (2), and the contact points are located in the lower area of the two embossing rollers (2), so that three-point limiting is formed when the PU synthetic leather is inserted.
7. The PU synthetic leather embossing roller device according to claim 1, characterized in that, The elastic spring (41) is a helical tension spring, and the auxiliary wheel (3) is a cylindrical roller with a smooth arc surface on its outer circumference to reduce frictional resistance with the embossing roller (2).