A calendering apparatus for leather production
By introducing components such as hinge rods, hinge sleeves, springs, extension rollers, and connecting fabric belts into the calendering equipment, the problem of small contact area of the calendering rollers was solved, thereby improving the efficiency of leather calendering and achieving a uniform force distribution effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG XINDE BAILI NEW MATERIALS CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-06-26
AI Technical Summary
In existing leather production equipment, the contact area between calendering rollers is small, resulting in limited calendering efficiency.
By introducing components such as hinge rods, hinge sleeves, springs, extension rollers, and connecting belts into the calendering equipment, the contact area of the calendering rollers is expanded, and a top-down pressing effect on the leather is achieved using hydraulic cylinders and gear assemblies.
It improves the calendering efficiency of leather, ensures that the leather is subjected to uniform force during the calendering process, expands the calendering contact area, and improves the processing effect.
Smart Images
Figure CN224411790U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of leather production equipment, specifically a calendering device for leather production. Background Technology
[0002] During the processing of leather products, a calender is used to calender the leather. After being processed by the calender, the internal fibers of the leather are straightened and opened, and some impurities are removed, making the leather softer and more flexible, and also improving the surface texture of the leather.
[0003] According to a calendering machine for leather product manufacturing (Announcement No.: CN222907935U), the aforementioned application uses an electric telescopic rod to control the forward and backward movement of the movable frame. At this time, a fixed column on the inner wall of the movable frame can be used to press a connecting rod with a guide groove inside. This allows the upper and lower connecting rods to drive two sets of calendering components to rotate and adjust along the trajectory of an arc-shaped groove, with the upper and lower short horizontal axes as the centers. Furthermore, the two sets of calendering components rotate in opposite directions, thus controlling the distance between the upper and lower calendering rollers. The smaller the distance, the greater the calendering force. By adjusting the distance between the two calendering rollers, quick control of the calendering force can be achieved, facilitating different degrees of calendering of the leather.
[0004] However, in actual use, although the above-mentioned equipment can adjust the gap between the two calendering rollers, the pressure contact surface for the leather material is only on the side closest to the rollers, resulting in a small calendering contact surface and limited calendering efficiency. Therefore, we propose a calendering device for leather production. Utility Model Content
[0005] The purpose of this invention is to provide a calendering device for leather production to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a calendering device for leather production, comprising a workbench, a top frame fixedly mounted on the top of the workbench, a hydraulic cylinder fixedly mounted on the top of the top frame, an adjusting slide fixedly connected to the output end of the hydraulic cylinder, a central shaft rotatably mounted through the inner wall of the adjusting slide, an upper pressure roller fixedly mounted through the outer wall of the central shaft, a lower pressure roller rotatably mounted on the inner surface of the top frame, and extension components for increasing the pressure contact area of the leather provided on the sides of the upper and lower pressure rollers, the extension components including a hinge rod, the top end of the hinge rod being hinged to the central shaft, a hinge sleeve rod sleeved on the outer wall of the bottom end of the hinge rod, a spring fixedly connected between the bottom end face of the hinge rod and the inner wall of the hinge sleeve rod, an extension roller rotatably mounted through the inner wall of the hinge sleeve rod, and a connecting cloth belt drivingly connected to the outer surface of the extension roller and the upper pressure roller.
[0007] Preferably, the inner walls on the left and right sides of the top frame are provided with straight grooves that are adapted to the outer diameter of the central shaft, and the central shaft is set in the straight grooves.
[0008] Preferably, there are two sets of hinge rods, hinge sleeve rods and springs, with the two sets of hinge rods, hinge sleeve rods and springs mirror images of each other on both sides of the central axis, and grooves of appropriate size are provided between the two sets of hinge rods and hinge sleeve rods.
[0009] Preferably, there are two sets of extension rollers, which are arranged mirror images of each other on both sides of the upper pressure roller. The upper pressure roller and the two sets of extension rollers have annular grooves on their arc-shaped outer surfaces that are adapted to the thickness of the connecting fabric strip.
[0010] Preferably, the side of the top frame is provided with an intermittent tightening assembly for adjusting the calendering force of the extension roller. The intermittent tightening assembly includes a drive gear sleeved on the outside of the central shaft. A driven gear is rotatably mounted on the outer wall of the bottom of the adjusting slide near the upper pressure roller. A slide rod is fixedly mounted on the outer wall of the driven gear near the upper pressure roller. A sliding frame is slidably mounted on the side of the top frame. A guide groove is opened on the side of the sliding frame near the driven gear. A tightening groove is opened on the inner wall of the sliding frame.
[0011] Preferably, the height of the guide groove is adapted to the outer diameter of the slide rod, and the connection point between the slide rod and the driven gear is located at a point offset from the center of the driven gear.
[0012] Preferably, the width of the tightening groove is adapted to the width of the hinged sleeve rod, and the hinged sleeve rod is disposed in the tightening groove.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: Through the transmission and cooperation of the hinge rod, hinge sleeve rod, spring, extension roller, connecting cloth belt, driving gear, driven gear, slide rod, sliding frame, guide groove, and tightening groove, the extension rollers on both sides of the upper pressure roller drive the connecting cloth belt connected to their outer sides to generate downward pressure on the leather. At this time, the part of the leather between the two sets of extension rollers can be pressed, improving the calendering efficiency of the device. As the upper pressure roller continues to rotate, the slide rod guides the sliding frame to perform small reciprocating motions. The two sets of hinge sleeve rods will cause the hinge rod to swing towards each other with the hinge point between it and the central axis as the rotation center. At this time, the two sets of extension rollers stretch the connecting cloth belt downward on the outer surface of the lower pressure roller, thereby pressing the calendered leather, expanding the calendering contact area of the leather, and further improving the calendering processing effect of the device on the leather. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 This is a side view of the adjustable slide structure of this utility model;
[0016] Figure 3 This is a schematic diagram of the end structure of the upper pressure roller, lower pressure roller, and extension roller of this utility model;
[0017] Figure 4 This is a partial explosion diagram of the intermittent tightening component of this utility model;
[0018] Figure 5 This is a cross-sectional view of the hinged sleeve of this utility model.
[0019] The components represented by each number in the attached diagram are listed below: 1. Worktable; 2. Top frame; 3. Hydraulic cylinder; 4. Adjusting slide; 5. Central shaft; 6. Upper pressure roller; 7. Lower pressure roller; 8. Hinge rod; 9. Hinge sleeve rod; 10. Spring; 11. Extension roller; 12. Connecting belt; 13. Drive gear; 14. Driven gear; 15. Slide rod; 16. Slide frame; 17. Guide groove; 18. Tightening groove. Detailed Implementation
[0020] 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.
[0021] Please see Figures 1-5 The diagram shows a calendering device for leather production, including a workbench 1. A top frame 2 is fixedly installed on the top of the workbench 1. A hydraulic cylinder 3 is fixedly installed on the top of the top frame 2. An adjusting slide 4 is fixedly connected to the output end of the hydraulic cylinder 3. A central shaft 5 is rotatably installed through the inner wall of the adjusting slide 4. An upper pressure roller 6 is fixedly installed through the outer wall of the central shaft 5. A lower pressure roller 7 is rotatably installed on the inner surface of the top frame 2. Extension components for increasing the pressure contact area of the leather are provided on the sides of the upper pressure roller 6 and the lower pressure roller 7. The extension components include a hinge rod 8. The top end of the hinge rod 8 is hinged to the central shaft 5. A hinge sleeve 9 is sleeved on the outer wall of the bottom end of the hinge rod 8. A spring 10 is fixedly connected between the bottom end face of the hinge rod 8 and the inner wall of the hinge sleeve 9. An extension roller 11 is rotatably installed through the inner wall of the hinge sleeve 9. A connecting belt 12 is drivingly connected to the outer surface of the upper pressure roller 6.
[0022] Please see Figure 1 , Figure 2Two sets of hydraulic cylinders 3 are provided to make the up-and-down adjustment of the slide 4 more stable. At the same time, the outer walls on the left and right sides of the slide 4 are in contact with the inner surfaces on the left and right sides of the top frame 2 to ensure the relative stability of the height adjustment of the slide 4 in the vertical direction and to prevent it from tilting and causing an angle between the upper pressure roller 6 and the lower pressure roller 7, which would affect the calendering effect of the device on leather products. In addition, two sets of extension components are provided, and the two sets of extension components are mirrored at both ends of the upper pressure roller 6, so that the calendering force of the extension components on the leather products between the upper pressure roller 6 and the lower pressure roller 7 is more balanced.
[0023] The inner walls on the left and right sides of the top frame 2 are provided with straight grooves that are compatible with the outer diameter of the central shaft 5, and the central shaft 5 is set in the straight grooves.
[0024] Please see Figure 1 By limiting the straight groove, the hydraulic cylinder 3 can control the height of the adjustable slide 4, the central shaft 5, and the upper pressure roller 6 in the vertical direction, thereby controlling the gap between the upper pressure roller 6 and the lower pressure roller 7, so as to adapt to the thickness of leather at different calendering stages and ensure the calendering effect of the device on leather products.
[0025] There are two sets of hinge rods 8, hinge sleeve rods 9 and springs 10. The two sets of hinge rods 8, hinge sleeve rods 9 and springs 10 are mirror images of each other on both sides of the central axis of the central shaft 5, and there are grooves of appropriate size between the two sets of hinge rods 8 and hinge sleeve rods 9.
[0026] Please see Figure 3 , Figure 4 The hinge rod 8 has a protruding rod on the side near the hinge sleeve rod 9, and the inner wall of the hinge sleeve rod 9 has a shrinkage groove that matches the size of the protruding rod. The two ends of the spring 10 are fixedly connected to the bottom end face of the protruding rod and the bottom inner wall of the shrinkage groove, respectively. In the initial state, the spring 10 always has an extension tendency, which causes the hinge sleeve rod 9 to drive the extension roller 11 to tighten the connecting cloth 12. The connecting cloth 12 is made of elastic fabric and has a certain degree of extensibility, ensuring that the connecting cloth 12 can always be sleeved on the outer surface of the extension roller 11 and the upper pressure roller 6 after the extension roller 11 is offset.
[0027] Meanwhile, the grooves provided between the two sets of hinge rods 8 and the hinge sleeve rods 9 ensure that no motion interference occurs when the included angle between the two sets of hinge rods 8 is reduced, thus guaranteeing the normal operation of the device and the normal extension of the extension roller 11.
[0028] There are two sets of extension rollers 11, which are mirror images of each other on both sides of the upper pressure roller 6. The upper pressure roller 6 and the two sets of extension rollers 11 have annular grooves on their arc-shaped outer surfaces that are adapted to the thickness of the connecting fabric belt 12.
[0029] Please see Figure 2 , Figure 3 The two sets of extension rollers 11 make the leather on the left and right sides of the upper pressure roller 6 more balanced in the calendering process. At the same time, the setting of the annular groove ensures that the connecting cloth belt 12 will not be laterally displaced on the outer surface of the extension roller 11 and the upper pressure roller 6, thus avoiding interference with the calendering process of the leather.
[0030] The top frame 2 is provided with an intermittent tightening assembly for adjusting the calendering force of the extension roller 11. The intermittent tightening assembly includes a drive gear 13 sleeved on the outside of the central shaft 5. A driven gear 14 is rotatably mounted on the outer wall of the bottom of the adjusting slide 4 near the upper pressure roller 6. A slide rod 15 is fixedly mounted on the outer wall of the driven gear 14 near the upper pressure roller 6. A sliding frame 16 is slidably mounted on the side of the top frame 2. A guide groove 17 is opened on the side of the sliding frame 16 near the driven gear 14. A tightening groove 18 is opened on the inner wall of the sliding frame 16.
[0031] Please see Figure 3 , Figure 4 , Figure 5 The driven gear 14 meshes with the driving gear 13 to achieve transmission, so that when the upper pressure roller 6 drives the central shaft 5 to rotate, the driven gear 14 is driven to rotate through the transmission of the driving gear 13. Since the driven gear 14 is installed on the bottom side of the adjusting slide 4, the height of the driven gear 14 is adjusted together with the central shaft 5 and the upper pressure roller 6, and the driven gear 14 always maintains a meshing transmission state with the driving gear 13.
[0032] The height of the guide groove 17 is adapted to the outer diameter of the slide rod 15, and the connection point between the slide rod 15 and the driven gear 14 is set at a point offset from the center of the driven gear 14.
[0033] Please see Figure 1 , Figure 3 , Figure 4 The sliding frame 16 is provided with a T-shaped rod on its side, and the inner walls of the left and right sides of the top frame 2 are provided with T-shaped grooves that are adapted to the T-shaped rods, thereby restricting the sliding frame 16 to only move vertically along the inner surface of the top frame 2. Since the sliding rod 15 is located at the eccentricity of the driven gear 14, when the driven gear 14 rotates continuously, the sliding frame 16 is driven to reciprocate in the vertical direction by the restriction of the sliding rod 15 and the guide groove 17.
[0034] The width of the tightening groove 18 is adapted to the width of the hinged sleeve 9, and the hinged sleeve 9 is disposed in the tightening groove 18.
[0035] Please see Figure 3 , Figure 4Since both sets of hinged sleeves 9 are set in the tightening groove 18, and the width of the tightening groove 18 is limited, the sliding frame 16 is restricted by the tightening groove 18 during its reciprocating motion in the vertical direction. The two sets of hinged sleeves 9 will cause the hinged rods 8 to swing towards each other with the hinge point between them and the central axis 5 as the center of rotation. At this time, the two sets of extension rollers 11 stretch the connecting cloth 12 downward on the outer surface of the lower pressure roller 7, thereby pressing the calendered leather and expanding the calendering contact area of the leather. When the sliding frame 16 moves upward, the connecting cloth 12 contracts due to its own elasticity, causing the two sets of hinged rods 8 to swing in opposite directions with the hinge point between them and the central axis 5 as the center of rotation. At this time, the two sets of extension rollers 11 roll upward along the outer surface of the lower pressure roller 7. During this process, the extension rollers 11 are always tightly attached to the outer surface of the leather by the elasticity of the spring 10, ensuring its calendering effect.
[0036] Working principle: The leather to be processed is passed through the gap between the upper pressure roller 6 and the lower pressure roller 7. Then, the hydraulic cylinder 3 is activated to control the adjusting slide 4 to drive the upper pressure roller 6 to move downward until the leather is pressed. The leather is pulled by the external traction device, so that the leather product continuously passes through the gap between the upper pressure roller 6 and the lower pressure roller 7. The upper pressure roller 6 and the lower pressure roller 7 squeeze the leather to complete the calendering process.
[0037] At the same time, the extension rollers 11 on the left and right sides of the upper pressure roller 6, together with the connecting cloth belt 12, are set above the lower pressure roller 7 and the leather. Due to the elasticity of the spring 10, the extension rollers 11 drive the connecting cloth belt 12 to exert pressure on the leather from top to bottom. At this time, the part of the leather between the two sets of extension rollers 11 can be pressed, thereby improving the calendering efficiency of the device.
[0038] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.
[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A calendering apparatus for leather production, comprising a workbench (1), wherein a top frame (2) is fixedly mounted on the top of the workbench (1), characterized in that: A hydraulic cylinder (3) is fixedly installed on the top of the top frame (2). An adjusting slide (4) is fixedly connected to the output end of the hydraulic cylinder (3). A central shaft (5) is rotatably installed through the inner wall of the adjusting slide (4). An upper pressure roller (6) is fixedly installed through the outer wall of the central shaft (5). A lower pressure roller (7) is rotatably installed on the inner surface of the top frame (2). Extension components for increasing the pressure contact area of the leather are provided on the sides of the upper pressure roller (6) and the lower pressure roller (7). The extension assembly includes a hinge rod (8), the top end of which is hinged to the central shaft (5), and a hinge sleeve rod (9) is sleeved on the outer wall of the bottom end of the hinge rod (8). A spring (10) is fixedly connected between the bottom end face of the hinge rod (8) and the inner wall of the hinge sleeve rod (9). An extension roller (11) is rotatably mounted through the inner wall of the hinge sleeve rod (9), and a connecting cloth belt (12) is connected to the outer surface of the upper pressure roller (6).
2. A calendering device for leather production according to claim 1, characterized in that: The top frame (2) has straight grooves on its left and right inner walls that are adapted to the outer diameter of the central shaft (5), and the central shaft (5) is set in the straight grooves.
3. A calendering device for leather production according to claim 1, characterized in that: The number of the hinge rod (8), hinge sleeve rod (9) and spring (10) is set in two sets. The two sets of hinge rod (8), hinge sleeve rod (9) and spring (10) are mirror images of each other on both sides of the central axis of the central shaft (5), and the two sets of hinge rod (8) and hinge sleeve rod (9) are provided with grooves of appropriate size.
4. A calendering device for leather production according to claim 1, characterized in that: The number of the extension rollers (11) is set in two sets, and the two sets of extension rollers (11) are mirror images of each other on both sides of the upper pressure roller (6). The upper pressure roller (6) and the two sets of extension rollers (11) have annular grooves on their arc-shaped outer surfaces that are adapted to the thickness of the connecting fabric (12).
5. A calendering device for leather production according to claim 1, characterized in that: The top frame (2) is provided with an intermittent tightening assembly for adjusting the calendering force of the extension roller (11). The intermittent tightening assembly includes a drive gear (13) sleeved on the outside of the central shaft (5). A driven gear (14) is rotatably installed on the outer wall of the bottom of the adjusting slide (4) near the upper pressure roller (6). A slide rod (15) is fixedly installed on the outer wall of the driven gear (14) near the upper pressure roller (6). A sliding frame (16) is slidably installed on the side of the top frame (2). A guide groove (17) is opened on the side of the sliding frame (16) near the driven gear (14). A tightening groove (18) is opened on the inner wall of the sliding frame (16).
6. A calendering device for leather production according to claim 5, characterized in that: The height of the guide groove (17) is adapted to the outer diameter of the slide rod (15), and the connection point between the slide rod (15) and the driven gear (14) is set at a point off-center from the driven gear (14).
7. A calendering device for leather production according to claim 5, characterized in that: The width of the tightening groove (18) is adapted to the width of the hinged sleeve (9), and the hinged sleeve (9) is disposed in the tightening groove (18).