Leather impressing device

Abstract

The utility model discloses a leather coining device, which relates to the technical field of leather production, and comprises a laminating mechanism, a coining mechanism and a material pulling mechanism which are sequentially arranged along a preset transmission path. The laminating mechanism comprises a carrier tape discharging barrel, a leather discharging barrel, two protective tape discharging barrels, a roller conveying assembly, a first pressing assembly and a second pressing assembly, the first pressing assembly and the second pressing assembly are sequentially arranged in the conveying direction of the roller conveying assembly, the first pressing assembly adopts a carrier tape to be laminated with a leather sheet, and protective tapes are arranged on the two sides of the second pressing assembly; and tensile deformation or edge warping of the leather in the moving process is effectively prevented. The coining mechanism performs continuous hot pressing through cooperation of an upper template and a lower template and a heating module, and the stability and definition of pattern coining are ensured. Compared with the prior art, the leather product coining device can improve the quality of leather products during coining, and is suitable for fine processing requirements of various leather products.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of leather production, and particularly relates to a leather stamping device. BACKGROUND

[0002] In the field of leather product processing, stamping or hot stamping processes are often used to form various patterns or characters on the surface of leather to improve the decorative effect and added value of products. The leather material itself has certain flexibility and ductility. When the leather is pulled to move between the compression roller or the upper and lower molds, slight deformation often occurs, such as the leather being stretched or the edges on both sides being warped. Such deformation not only affects the accuracy and aesthetics of the stamped or hot stamped pattern, but also can form wrinkles on the edges of the leather, resulting in a decrease in product quality. In order to reduce such deformation, it is usually attempted to adjust the tension applied to the leather, to select thicker or harder leather materials, but the deformation problem of the leather during pulling or moving cannot be fundamentally solved. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a leather stamping device which can effectively avoid the problems of pattern deformation and deformation on both sides of the leather during leather stamping.

[0004] According to the leather stamping device provided by the embodiment of the present application, the leather stamping device comprises: a laminating mechanism, a stamping mechanism and a pulling mechanism which are sequentially arranged along a preset transmission path; the laminating mechanism comprises a carrier tape feeding cylinder, a leather feeding cylinder, two protective tape feeding cylinders, a roller transmission assembly and a first compression assembly and a second compression assembly which are sequentially arranged along the transmission direction of the roller transmission assembly; the carrier tape feeding cylinder is used for feeding the carrier tape to the roller transmission assembly, the leather feeding cylinder is used for feeding the leather sheet to the upper surface of the carrier tape, and the leather sheet is aligned with the center of the carrier tape; the first compression assembly is used for compressing the leather sheet and the carrier tape to obtain a first combined sheet; the protective tape feeding cylinder is used for feeding the protective tape to the upper surface of the area on both sides of the first combined sheet which is not covered by the leather sheet; the second compression assembly is used for compressing the protective tape and the first combined sheet to obtain a second combined sheet; the stamping mechanism comprises an upper mold plate, a lower mold plate and a stamping driving element, the middle area between the upper mold plate and the lower mold plate is used for passing the second combined sheet, the upper mold plate is provided with a heating module, the lower surface of the upper mold plate is provided with a male die corresponding to the pattern to be printed, and the driving end of the stamping driving element is connected with the upper mold plate and used for driving the upper mold plate to press down so as to print the pattern on the leather of the second combined sheet to obtain a finished sheet; and the pulling mechanism comprises a pulling driving element and a pair of pulling rollers, and the driving end of the pulling driving element is connected with the pulling rollers.

[0005] According to the leather stamping device, the following beneficial effects are achieved. First, the first pressing assembly of the bonding mechanism is used to paste the carrier tape with low elasticity and adhesive coating on the leather substrate, and the width of the carrier tape is greater than the width of the leather, so that the leather can remain relatively stable during the drawing and stamping process, and the problems of stretching deformation, warping, wrinkling and the like of the leather are significantly reduced. Then, the second pressing assembly of the bonding mechanism is used to add a protective tape on both sides of the carrier tape to avoid the uncovered area of the carrier tape from adhering or contaminating other components due to exposure, thereby ensuring the production continuity and product quality. Finally, the stamping mechanism cooperates with the heating module to perform pattern stamping, which can ensure the clarity and adhesion quality of the leather surface pattern, and cooperate with the stable conveying of the drawing mechanism to realize continuous production, improve the production efficiency and reduce the defective product rate. The leather bonding device effectively suppresses the deformation amount of the leather under high temperature and high pressure by bonding the carrier tape and the leather, improves the precision and quality of the stamped pattern, and the protective tape covers the free area on both sides of the carrier tape to avoid external interference, material adhesion and edge damage, thereby further stabilizing the product quality.

[0006] According to some embodiments of the present application, the first pressing assembly comprises two oppositely arranged first pressing rollers and a first adjustable roller holder, the two first pressing rollers are arranged in the same vertical direction, one of the first pressing rollers is arranged at the adjustable end of the first adjustable roller holder, and the middle regions of the two first pressing rollers are used for passing the carrier tape and the leather sheet.

[0007] According to some embodiments of the present application, the second pressing assembly comprises two oppositely arranged second pressing rollers and a second adjustable roller holder, the two second pressing rollers are arranged in the same vertical direction, one of the second pressing rollers is arranged at the adjustable end of the second adjustable roller holder, and the middle regions of the two second pressing rollers are used for passing the first combined sheet and the protective tape.

[0008] According to some embodiments of the present application, the first pressing assembly further comprises a plurality of first guide rollers arranged on the first adjustable roller holder, a pair of first guide wheels is sleeved on the first guide roller, the leather sheet is wound on the first guide roller and located between the pair of first guide wheels.

[0009] According to some embodiments of the present application, the second pressing assembly further comprises a plurality of second guide rollers arranged on the second adjustable roller holder, two pairs of second guide wheels are sleeved on the second guide roller, the protective tape is wound on the second guide roller and located between the pair of second guide wheels.

[0010] According to some embodiments of this application, the second pressing roller is provided with an elastic plastic layer.

[0011] According to some embodiments of this application, the imprinting mechanism further includes a plurality of guide posts, one end of which is connected to the upper surface of the lower template, and the other end of which is movably inserted through the upper template.

[0012] According to some embodiments of this application, a cooling device is also included, which is disposed between the imprinting mechanism and the feeding mechanism along the transport path. The cooling device includes a cooling roller, through which the transport path passes, and the cooling roller is used to cool the finished sheet output from the imprinting mechanism.

[0013] According to some embodiments of this application, a receiving device is also included, which is disposed after the pulling mechanism along the transmission path. The receiving device includes a receiving cylinder and a receiving drive, which drives the receiving cylinder to rotate.

[0014] According to some embodiments of this application, a control mechanism is also included, which includes a drive control module and a temperature control module. The drive control module is connected to the imprinting drive and the material pulling drive and is used to control the working rhythm of the imprinting drive and the material pulling drive to be consistent. The temperature control module is connected to the heating module. Attached Figure Description

[0015] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0016] Figure 1 This is a schematic diagram of the leather embossing device in the embodiment;

[0017] Figure 2 This is a schematic diagram of the bonding mechanism in the embodiment;

[0018] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0019] Figure 4 for Figure 2 A magnified view of a section at point B in the middle;

[0020] Figure 5 This is a schematic diagram of the embossing mechanism and cooling device in the embodiment;

[0021] Figure 6 This is a schematic diagram of the embossing mechanism and cooling device from another perspective in the embodiment.

[0022] Figure label:

[0023] Fitting mechanism 100; first pressing assembly 110; first adjustable roller holder 111; first pressing roller 112; first guide roller 113; first guide wheel 113a; second pressing assembly 120; second adjustable roller holder 121; second pressing roller 122; second guide roller 123; second guide wheel 123a; leather feeding cylinder 130; protective tape feeding cylinder 140; roller transmission assembly 150; stamping mechanism 200; upper die plate 210; lower die plate 220; guide column 230; cooling device 300; cooling roller 310; material collecting device 400; carrier tape 510; first combined sheet 520; second combined sheet 530; finished sheet 540; leather sheet 550; protective tape 560. DETAILED DESCRIPTION

[0024] Embodiments of the present application are described below in detail with reference to the accompanying drawings, in which the same or similar components or components having the same or similar functions are denoted by the same or similar reference numerals throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are intended only to explain the present application, and should not be construed as limiting the present application.

[0025] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or component referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

[0026] In the description of the present application, if the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than, etc. is understood as not including the number, above, below, etc. is understood as including the number. If it is described as first, second, it is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of indicated technical features.

[0027] In the description of the present application, unless otherwise explicitly limited, the words such as setting, mounting, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0028] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in one or more embodiments or examples.

[0029] As shown in Figure 1 and Figure 2 , the leather embossing device of the embodiment mainly comprises a laminating mechanism 100, an embossing mechanism 200 and a pulling mechanism (not shown) arranged in sequence along a preset conveying path. The laminating mechanism 100 is used to laminate the carrier tape 510, the leather sheet 550 and the protective tape 560 layer by layer into a composite sheet convenient for subsequent embossing. The laminating mechanism 100 comprises a carrier tape 510 feeding cylinder, a leather feeding cylinder 130, two protective tape 560 feeding cylinders 140, a roller conveying assembly 150, and a first pressing assembly 110 and a second pressing assembly 120 arranged in sequence along the conveying direction. It can be understood that the carrier tape 510 feeding cylinder and the leather feeding cylinder 130 respectively place the carrier tape 510 and the leather sheet 550. Among them, the carrier tape 510 is made of a material with relatively low elasticity and is pre-coated with an adhesive layer, which is used to combine with the leather to reduce the deformation of the leather in the subsequent conveying and embossing process. The carrier tape 510 is conveyed by the roller conveying assembly 150, and at the same time the leather is fed from the leather feeding cylinder 130 and aligned with the central area of the carrier tape 510, so that the leather sheet 550 is laminated on the upper surface of the carrier tape 510. Exemplarily, as shown in Figure 2 and Figure 3 , the first pressing assembly 110 comprises two oppositely arranged first pressing rollers 112, which apply appropriate pressure to firmly laminate the leather and the carrier tape 510 when the carrier tape 510 and the leather sheet 550 pass between the two rollers, obtaining a first combined sheet 520. In order to avoid the warping of the edges of the leather, the width of the carrier tape 510 is greater than the width of the leather, so that there will be a free area between the two sides of the carrier tape 510 and the leather. In order to avoid excessive adhesion or contact with other components in this area, causing pollution or pulling, the laminating mechanism 100 is also provided with two protective tape 560 feeding cylinders 140, which supply the protective tape 560 to the upper surface of the free area on both sides of the first combined sheet 520. Exemplarily, as shown in Figure 2 and Figure 4As shown, the second pressing assembly 120 also includes two opposing second pressing rollers 122. After pressing by this assembly, the protective strip 560 will be firmly adhered to both sides of the carrier belt 510, thereby forming the second combined sheet 530. Through the above steps, the lower surface of the leather sheet 550 is adhered to the carrier belt 510, and the empty areas on both sides are covered by the protective strip 560, further ensuring the safety of the subsequent printing process and the stability of product quality.

[0030] like Figure 5 and Figure 6 As shown, the embossing mechanism 200 of this embodiment mainly includes an upper template 210, a lower template 220, and an embossing drive, primarily for hot pressing or stamping leather patterns. After the second composite sheet 530 reaches the embossing mechanism 200, its central portion (i.e., the area where the leather is located in the second composite sheet 530) passes between the upper and lower templates 220. Optionally, the upper template 210 and the lower template 220 are movably connected by a guide post 230. One end of the guide post 230 is connected to the upper surface of the lower template 220, and the other end is movably inserted through the upper template 210. The upper template 210 is equipped with a heating module and has a punch or pattern mold at the bottom. The embossing drive (not shown) is connected to the upper template 210 and can precisely press the upper template 210 vertically downwards according to production needs, forming a mold-closing effect with the lower template 220. The desired pattern is firmly printed onto the leather surface using pressure and temperature. The punch pattern is in full contact with the leather, maintaining the clarity and shape stability of the pattern. Understandably, after the stamping is completed, the feeding mechanism is responsible for continuing to transport the stamped composite sheet to the next process or for winding, while also providing power for the movement of the strip in the above process. The feeding mechanism includes a feeding drive and a pair of feeding rollers. The feeding drive drives the feeding rollers to clamp and pull the composite sheet forward smoothly with a controllable synchronous rhythm, thereby realizing automated and continuous production.

[0031] Optionally, such as Figure 3 As shown, in some embodiments, to further meet the bonding requirements of leather materials or carrier tapes 510 with different thicknesses and tensions, the first pressing assembly 110 further includes a first adjustable roller frame 111, with two first pressing rollers 112 arranged in the same vertical direction, one of which is movably mounted on the first adjustable roller frame 111. By adjusting the position or height of the first adjustable roller frame 111, the pressing gap and clamping force between the two first pressing rollers 112 can be changed to adapt to different specifications of leather sheets 550 and carrier tapes 510 thicknesses, ensuring uniform pressure and firm bonding during bonding, thereby obtaining a more stable first combined sheet 520. Meanwhile, to achieve a good pressing effect during the bonding process of the protective tape 560 and the first combined sheet 520, the second pressing assembly 120 further includes a second adjustable roller frame 121, such as... Figure 2As shown, two second compression rollers 122 are also arranged along the same vertical direction, with one of the second compression rollers 122 mounted on the adjustable end of the second adjustable roller holder 121. By adjusting the roller holder, the compression gap and pressure can be flexibly set for different materials or thicknesses of the protective tape 560 and the leather-carrying tape 510 combination, further reducing uneven fitting, wrinkles or slippage and other phenomena.

[0032] Preferably, in order to ensure that the leather sheet 550 has a stable feeding path in the fitting mechanism 100 and is accurately aligned with the center of the carrying tape 510, the first compression assembly 110 is provided with a plurality of first guide rollers 113, each of which is provided with a pair of first guide wheels 113a. As shown, Figure 3 The first guide rollers 113 are mounted on the first adjustable roller holder 111, so that the leather sheet 550 passes around the guide rollers and is located between the symmetrically arranged first guide wheels 113a. This can effectively limit the lateral deviation or excessive slack of the leather during feeding, ensuring that the leather sheet 550 is flat and always maintained on the predetermined transmission path, thereby obtaining a more accurate fitting effect. For the fitting of the protective tape 560, a plurality of second guide rollers 123 are also provided in the second compression assembly 120, as shown, Figure 4 Each second guide roller 123 is provided with two pairs of second guide wheels 123a. Figure 4 Only one of each pair of guide wheels is shown in the figure). Because the protective tape 560 is usually in the form of a tape and has a relatively narrow width, in order to avoid displacement or distortion of the protective tape 560 during high-speed transmission and fitting, the second guide wheels 123a can provide moderate guidance for the protective tape 560, prompting the protective tape 560 to maintain a consistent fitting direction with the side area of the carrying tape 510 when passing around the second guide rollers 123.

[0033] Preferably, because the first combined sheet 520 is formed by fitting the leather sheet 550 and the carrying tape 510, and the leather is fitted in the central position of the carrying tape 510, the thickness of the first combined sheet 520 is not uniform, showing a state of thick in the middle area and thin on both sides. Therefore, in order to better fit the protective tape 560 with the areas on both sides of the first combined sheet 520 that are not covered with leather, the second compression roller 122 is provided with an elastic plastic layer in some embodiments. The provision of the elastic plastic layer enables the second compression roller 122 to better fit with the first combined sheet 520 and the protective tape 560.

[0034] In some embodiments, a cooling device 300 is also added between the embossing mechanism 200 and the pulling mechanism. As shown, Figure 5 and Figure 6As shown, the cooling device 300 includes a cooling roller 310, and the finished sheet 540 (i.e. the composite structure of the finished embossed leather sheet 550 and the carrier tape 510, the protective tape 560) is wound around the cooling roller 310 for cooling treatment. After the leather is heated due to high-temperature hot pressing or hot stamping in the embossing process, if the material is directly drawn or wound in a normal temperature environment, it may cause uneven heat dissipation of the sheet or quality problems such as curling and deformation; and by contacting and taking away the residual heat through the cooling roller 310, the temperature of the leather surface can be more uniformly lowered, thereby further stabilizing the pattern and leather shape after embossing, which helps to improve the consistency of the finished product quality.

[0035] As can be understood, as shown, Figure 1 As shown, after the drawing mechanism, in order to better achieve the storage and storage of the finished sheet 540, a material collecting device 400 can also be provided, which includes a material collecting roller and a material collecting driving member. The material collecting driving member is connected with the material collecting roller, and can drive the material collecting roller to continuously rotate under the condition of pre-set speed or tension control, and then uniformly wind the finished sheet 540 on the material collecting roller. By properly adjusting the rotating speed and torque of the material collecting driving member, the winding tension can be kept within a reasonable range, avoiding stretching or folding damage to the finished sheet 540. At the same time, cooperating with the stable traction of the drawing mechanism, the material collecting device 400 can smoothly wind the finished sheet 540 into a roll form on the automatic production line, which is convenient for subsequent slitting, packaging or transportation operations.

[0036] It can be understood that, in some embodiments, in order to ensure that the embossing mechanism 200 and the pulling mechanism can work together according to the preset production rhythm, and to make the heating module heat press or stamp the leather within the ideal temperature range, the device further comprises a control mechanism. The control mechanism is composed of a driving control module and a temperature control module. The driving control module is connected with the embossing drive and the pulling drive, and is used to set and schedule the working rhythm and movement sequence of the equipment. When the upper die plate 210 in the embossing mechanism 200 completes the heat pressing work on the leather, the driving control module can send instructions to the pulling drive to pull the embossed sheet into the next cooling or material collecting process, realizing the accurate matching between the embossing rhythm and the pulling rhythm. The driving control module can flexibly adjust the pressing time, pressing pressure and pulling speed according to different leather materials, thickness and pattern depth requirements, so as to avoid the premature pulling of the leather due to improper running sequence, resulting in wrinkles or pattern deformation. The temperature control module is connected with the heating module of the upper die plate 210, and is used to monitor and maintain the heating temperature during the embossing or stamping process. Temperature sensors can be arranged to monitor the surface or internal temperature of the upper die plate 210, and to feed back the detected temperature value to the temperature control module in real time. The temperature control module adjusts the power of the heating module according to the preset or real-time feedback data, so as to ensure that the embossing temperature is stable within the set range. If the temperature is too high or too low, the control module will timely issue adjustment instructions to avoid damage to the leather due to overheating or unclear pattern pressing due to insufficient temperature. When the temperature for embossing or stamping is kept within the optimal range, it can not only ensure clear pattern and firm embossing, but also shorten the process cycle and improve production efficiency.

[0037] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A leather embossing device, characterized in that, include: The bonding mechanism, the imprinting mechanism, and the material pulling mechanism are sequentially arranged along a preset transmission path; The bonding mechanism includes a carrier tape feeding cylinder, a leather feeding cylinder, two protective tape feeding cylinders, a roller conveyor assembly, and a first pressing assembly and a second pressing assembly arranged sequentially along the conveying direction of the roller conveyor assembly. The carrier tape feeding cylinder feeds the carrier tape to the roller conveyor assembly, and the leather feeding cylinder feeds the leather sheet onto the upper surface of the carrier tape, with the leather sheet aligned with the center of the carrier tape. The first pressing assembly presses the leather sheet against the carrier tape to form a first combined sheet. The protective tape feeding cylinder feeds the protective tape onto the upper surface of the areas on both sides of the first combined sheet that do not cover the leather sheet. The second pressing assembly presses the protective tape against the first combined sheet to form a second combined sheet. The embossing mechanism includes an upper template, a lower template, and an embossing drive. The middle area between the upper template and the lower template is used for the second combined sheet to pass through. The upper template is provided with a heating module, and the lower surface of the upper template is provided with a punch corresponding to the pattern to be printed. The driving end of the embossing drive is connected to the upper template and is used to drive the upper template to press down so as to print the pattern onto the leather of the second combined sheet to obtain the finished sheet. The material pulling mechanism includes a material pulling drive and a pair of material pulling rollers, with the driving end of the material pulling drive connected to the material pulling rollers.

2. The leather embossing device according to claim 1, characterized in that: The first pressing assembly includes two opposing first pressing rollers and a first adjustable roller frame. The two first pressing rollers are arranged in the same vertical direction, and one of the first pressing rollers is located at the adjustable end of the first adjustable roller frame. The middle area of ​​the two first pressing rollers is used for the carrier belt and the leather sheet to pass through.

3. The leather embossing apparatus according to claim 1, characterized in that: The second pressing assembly includes two opposing second pressing rollers and a second adjustable roller frame. The two second pressing rollers are arranged in the same vertical direction, and one of the second pressing rollers is located at the adjustable end of the second adjustable roller frame. The middle area of ​​the two second pressing rollers is used for the first combined sheet and the protective strip to pass through.

4. The leather embossing apparatus according to claim 2, characterized in that: The first pressing assembly further includes a plurality of first guide rollers, which are disposed on the first adjustable roller frame. A pair of first guide wheels are fitted on the first guide rollers, which are used to guide the leather sheet as it passes around the first guide rollers.

5. The leather embossing apparatus according to claim 3, characterized in that: The second pressing assembly also includes several second guide rollers, which are disposed on the second adjustable roller frame. Two pairs of second guide wheels are sleeved on the second guide rollers, which are used to guide the protective belt when the protective belt passes around the second guide rollers.

6. The leather embossing apparatus according to claim 3, characterized in that: The second pressing roller is provided with an elastic plastic layer.

7. The leather embossing apparatus according to any one of claims 1 to 6, characterized in that: The embossing mechanism also includes several guide columns, one end of which is connected to the upper surface of the lower template, and the other end of which can be movably inserted through the upper template.

8. The leather embossing apparatus according to any one of claims 1 to 6, characterized in that: It also includes a cooling device disposed between the embossing mechanism and the feeding mechanism along the conveying path. The cooling device includes a cooling roller, and the conveying path passes through the cooling roller. The cooling roller is used to cool the finished sheet output from the embossing mechanism.

9. The leather embossing apparatus according to any one of claims 1 to 6, characterized in that: It also includes a receiving device, which is disposed after the pulling mechanism along the transmission path. The receiving device includes a receiving cylinder and a receiving drive, and the receiving drive drives the receiving cylinder to rotate.

10. The leather embossing apparatus according to any one of claims 1 to 6, characterized in that: It also includes a control mechanism, which includes a drive control module and a temperature control module. The drive control module is connected to the imprinting drive and the material pulling drive and is used to control the working rhythm of the imprinting drive and the material pulling drive to be consistent. The temperature control module is connected to the heating module.

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