A pressure-adaptive extrusion roller assembly for an extrusion coating machine
By designing an adaptive extrusion roller assembly in the extrusion coating machine and using lever arms and torsion spring assemblies to adjust the extrusion pressure, the problem of material thickness and hardness fluctuations was solved, achieving high-efficiency coating quality and equipment adaptability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGXI KUNTAI CHEMICAL TECHNOLOGY CO LTD
- Filing Date
- 2025-07-08
- Publication Date
- 2026-06-30
AI Technical Summary
Existing extrusion coating machines struggle to adapt to varying material thickness and hardness, resulting in high rates of coating defects such as bubbles and wrinkles. They also cannot effectively handle both hard and soft materials, impacting coating quality and equipment adaptability.
A pressure-adaptive extrusion roller assembly was designed, comprising a fixed base, a movable roller frame, a lever arm, a torsion spring assembly, and a fulcrum assembly. Through the cooperation of the lever arm and the torsion spring, the extrusion pressure is automatically adjusted to adapt to changes in material thickness and hardness, thereby achieving adaptive extrusion.
It improves the equipment's adaptability to complex materials, reduces the coating defect rate, and enhances production efficiency and equipment applicability.
Smart Images
Figure CN224428152U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of packaging equipment technology, and in particular to a pressure adaptive extrusion roller assembly for an extrusion wrapping machine. Background Technology
[0002] Fertilizers and other chemical products need to be packaged using a wrapping machine during the production process. Among them, the extrusion wrapping machine is a commonly used packaging wrapping equipment. Extrusion wrapping machines generally use a fixed pressure or a simple spring structure for extrusion rollers to produce products. That is, a constant pressure is applied by a cylinder or a hydraulic cylinder, or a pressure-boosting spring is added to the roller frame, and the spring deformation provides cushioning.
[0003] However, the existing technology has the following shortcomings: the constant pressure applied by the cylinder or liquid cylinder alone is difficult to adapt to the material thickness fluctuation, resulting in a high rate of defects such as bubbles and wrinkles in the coating; the limited buffer provided by adding a pressure spring is prone to pressure overload or insufficient contact when facing materials with large differences in hardness (such as hard materials and foam sediments) because the spring stiffness is fixed, which hinders the coating quality and equipment adaptability.
[0004] Therefore, a pressure-adaptive pressure-adaptive extrusion roll assembly is now needed. Utility Model Content
[0005] The main purpose of this invention is to provide a pressure-adaptive extrusion roller assembly for an extrusion coating machine, which aims to solve the problem that existing extrusion coating machines are unable to handle complex materials during the production process.
[0006] To achieve the above objectives, the present invention proposes a pressure-adaptive extrusion roller assembly for an extrusion coating machine, which is applied to the extrusion coating machine and includes:
[0007] A fixed base is fixedly connected to the extrusion wrapping machine. The fixed base includes vertical plates on the left and right sides, and multiple vertical guide grooves are symmetrically opened on the inner side of the vertical plates along the vertical direction.
[0008] A movable roller frame, the movable roller frame including movable parts, and a plurality of movable parts being slidably connected to a plurality of vertical guide grooves;
[0009] The extrusion roller has its two ends rotatably connected to two symmetrically arranged movable parts.
[0010] A lever arm extends along the length of the fixed base. Multiple lever arms are symmetrically arranged on the inner walls of both sides of the fixed base. One end of the lever arm is hinged to the top of the movable part, and the other end of the lever arm is hinged to the fixed base. A T-shaped fulcrum groove is also provided on the lever arm along its length.
[0011] A fulcrum assembly, comprising a sliding fulcrum block and a fulcrum shaft, wherein the sliding fulcrum block is slidably connected to the T-shaped fulcrum groove, and the fulcrum shaft passes through the sliding fulcrum block in a direction perpendicular to the material movement and is connected to the fixed base at both ends;
[0012] A torsion spring assembly, comprising a torsion shaft and a torsion spring, wherein the torsion shaft is arranged perpendicular to the material movement direction and is fixedly connected to the inner walls of both sides of the fixed base, and the torsion spring is sleeved on the torsion shaft, and both ends of the torsion spring are connected to the lever arm.
[0013] Preferably, the torsion spring further includes a fixed ring and a lever. The fixed ring is disposed at both ends of the torsion spring, one end of the lever is disposed radially along the fixed ring and extends upward, and the other end of the lever is hinged to the lever arm.
[0014] Preferably, the torsion spring assembly further includes a preload nut, and the left and right ends of the torsion shaft are provided with threaded adjustment ends, with the preload nut screwed onto the threaded adjustment ends.
[0015] Preferably, the fulcrum assembly further includes a fulcrum bracket, the fulcrum bracket being disposed on the upright plate corresponding to the T-shaped fulcrum groove, and the two ends of the fulcrum shaft being interference-fitted to the fulcrum bracket.
[0016] Preferably, the pressure adaptive extrusion roller assembly further includes multiple limiting baffles, which are disposed on the vertical plate at both ends corresponding to the axial ends of the vertical guide groove.
[0017] Preferably, the movable component includes a horizontal plate and two vertical plates, the two vertical plates being disposed at the left and right ends of the horizontal plate to form a U-shaped structure, and the two vertical plates being slidably connected to the vertical guide groove.
[0018] Preferably, the movable roller frame further includes a roller shaft mounting seat, which is disposed at the top of the horizontal plate and fixedly disposed on the movable component on one side near the axis of the movable roller frame. The extrusion roller is connected to the movable component through the roller shaft mounting seat.
[0019] The pressure adaptive extrusion roller assembly of this utility model extrusion coating machine has a lever arm and a movable roller frame on a fixed base along the direction of material movement, and a vertical guide groove is provided on the fixed base. When different materials are moving, the extrusion roller is pushed to drive the movable roller frame to move along the vertical guide groove, and the extrusion pressure is adjusted by the lever arm and torsion spring assembly, so as to automatically cope with complex materials, improve the applicability of the equipment, and improve production efficiency. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure of a pressure adaptive extrusion roller assembly according to an embodiment of the present invention;
[0022] Figure 2 This is a schematic diagram of the structure of a fulcrum component according to an embodiment of the present invention;
[0023] Figure 3 This is a schematic diagram of the structure of the movable roller frame according to an embodiment of the present invention;
[0024] Figure 4 This is a schematic diagram of the structure of a torsion spring assembly according to an embodiment of the present invention.
[0025] Explanation of icon numbers:
[0026] label name label name 1000 Pressure Adaptive Extrusion Roller Assembly 100 Fixed base 110 uprights 120 Vertical guide groove 200 movable roller frame 210 Active parts 211 Horizontal board 212 vertical board 220 Roller mounting base 300 Extrusion rollers 400 lever arm 410 T-shaped pivot groove 420 First hinge joint 430 Second hinge joint 440 Third hinge section 500 Pivot Components 510 Sliding pivot block 520 Pivot axis 530 fulcrum support 600 Torsion spring assembly 610 Torque shaft 620 Torsion spring 621 retaining ring 622 lever 630 Preload nuts 700 Limit baffle
[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0028] 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.
[0029] It should be noted that all directional indicators in this embodiment are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.
[0030] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0031] like Figures 1-4 As shown, this utility model proposes a pressure adaptive extrusion roller assembly 1000 for an extrusion coating machine, comprising: a fixed base 100, which is fixedly connected to the extrusion coating machine, the fixed base 100 including upright plates 110 disposed on the left and right sides, and a plurality of vertical guide grooves 120 symmetrically formed on the inner side of the upright plates 110 along the vertical direction; a movable roller frame 200, which includes movable parts 210, and the plurality of movable parts 210 are slidably connected to the plurality of vertical guide grooves 120 respectively; an extrusion roller 300, the two ends of which are rotatably connected to two symmetrically arranged movable parts 210 respectively; and lever arms 400, which extend along the length of the fixed base 100, and the plurality of lever arms 400 are symmetrically arranged on the inner walls of the two sides of the fixed base 100, one end of which... The lever arm 400 is hinged to the top of the movable part 210 and the other end of the lever arm 400 is hinged to the fixed base 100. The lever arm 400 is also provided with a T-shaped fulcrum groove 410 along its length. The fulcrum assembly 500 includes a sliding fulcrum block 510 and a fulcrum shaft 520. The sliding fulcrum block 510 is slidably connected to the T-shaped fulcrum groove 410. The fulcrum shaft 520 passes through the sliding fulcrum block 510 in a direction perpendicular to the material movement and is connected to the fixed base 100 at both ends. The torsion spring assembly 600 includes a torsion shaft 610 and a torsion spring 620. The torsion shaft 610 is arranged in a direction perpendicular to the material movement and is fixedly connected to the inner walls of both sides of the fixed base 100. The torsion spring 620 is sleeved on the torsion shaft 610 and its two ends are connected to the lever arm 400.
[0032] In this embodiment, the extrusion rollers 300 involved in this utility model are all upper rollers, which cooperate with the lower rollers inherent in the extrusion coating machine to form a technical effect of vertically extruding the material. When the material enters below the extrusion rollers 300, the material pushes the movable part 210 of the movable roller frame 200 to move upward, thereby driving the roller shaft mounting seat 220 to move upward. When the movable roller frame 200 moves upward, it drives the lever arm 400 to rotate around its hinge point with the fixed base 100. The rotation of the lever arm 400 pulls the torsion spring assembly 600, causing the torsion spring 620 to undergo torsional deformation. As the thickness or hardness of the material increases, the displacement of the movable roller frame 200 increases, the rotation angle of the lever arm 400 increases, and the deformation of the torsion spring 620 increases accordingly. Therefore, the reverse torque generated by the torsion spring 620 also increases. The increased torque is converted into downward pressure acting on the extrusion roller 300 through the lever arm 400 and the roller mounting seat 220, thereby automatically increasing the extrusion pressure of the extrusion roller 300 on the material. Conversely, if the thickness or hardness of the material decreases, the extrusion pressure automatically decreases. The fulcrum position of the lever arm 400 can be adjusted by the sliding fulcrum block 510 and the fulcrum shaft 520. By adjusting the fulcrum position of the lever arm 400, the lever arm ratio can be changed, thereby changing the "stiffness" or range of pressure change.
[0033] In detail, the lever arm 400 includes a first hinge joint 420, a second hinge joint 430, and a third hinge joint 440. The first hinge joint 420 is disposed on one end of the lever arm 400 near the movable member 210, and the other end of the first hinge joint 420 is fixedly connected to the top end of the movable member 210. The second hinge joint 430 is disposed on one end of the lever arm 400 away from the second hinge joint 430. The lever arm 400 is fixedly connected to the upright plate 110 of the fixed base 100 through the second hinge joint 430. The third hinge joint 440 is disposed between the first hinge joint 420 and the end of the T-shaped fulcrum groove 410. The third hinge joint 440 is used to connect the lever arm 400 and the torsion spring assembly 600.
[0034] More specifically, when the fulcrum is close to the fixed end of the lever arm 400, the lever arm ratio is relatively low and the pressure sensitivity is low, making it suitable for hard materials such as metal films; when the fulcrum is close to the movable end of the lever arm 400, the lever arm ratio is high and the pressure sensitivity is high, making it suitable for soft materials such as foam plastics.
[0035] In one embodiment, the torsion spring 620 further includes a retaining ring 621 and a lever 622. The retaining ring 621 is disposed at both ends of the torsion spring 620, one end of the lever 622 is disposed radially along the retaining ring 621 and extends upward, and the other end of the lever 622 is hinged to the lever arm 400.
[0036] In this embodiment, the torsion spring 620 is a helical torsion spring 620. Fixed rings 621 are fixedly connected to the ends of the left and right ends of the torsion spring 620. A lever 622 extends radially from the outer side of the fixed ring 621. The lever 622 is a straight outstretched arm, and its end is hinged to the third hinge joint 440. When the pressure increases, the movable roller frame 200 moves upward, causing the lever arm 400 to rotate around the fulcrum axis 520 to pull the lever 622. The lever 622 causes the fixed ring 621 to rotate, forcing the torsion spring 620 to twist around the torsion axis 610 (angle θ increases). This causes the torsion spring 620 to deform, generating a reverse torque, which is then converted into a pulling force on the lever arm 400 through the lever 622, thereby increasing the compressive force. When the pressure decreases, the torsion spring 620 returns to its original deformation, pushing the fixed ring 621 to return the lever 622 to its original position, causing the lever arm 400 to rotate in the opposite direction, thus causing the movable roller frame 200 to move downward.
[0037] In one embodiment, the torsion spring assembly 600 further includes a preload nut 630, and the left and right ends of the torsion shaft 610 are provided with threaded adjustment ends, with the preload nut 630 screwed onto the threaded adjustment ends.
[0038] In this embodiment, the bottom end of the preload nut 630 is also provided with a scale. The scale of the preload nut 630 is located on the upright plate 110 near the fixed base 100. The operator can rotate the preload nut 630 by using a wrench or other tightening tools to drive the torque shaft 610 to rotate, thereby achieving the technical effect of protecting the preload of the torsion spring 620. The scale on the scale is convenient for the operator to read.
[0039] In another embodiment, the torsion spring assembly 600 may also include a worm gear assembly, which is also located at the threaded adjustment end. The worm end of the worm gear assembly is provided with a hexagonal drive groove or a handwheel to facilitate operation by the operator.
[0040] In one embodiment, the fulcrum assembly 500 further includes a fulcrum bracket 530, which is disposed on the upright plate 110 corresponding to the T-shaped fulcrum groove 410, and the two ends of the fulcrum shaft 520 are interference-fitted to the fulcrum bracket 530.
[0041] In this embodiment, the fulcrum support 530 is a combination of a plate-shaped structural member and a columnar structural member with an elastic inner liner. The two ends of the fulcrum shaft 520 pass through the sliding fulcrum block 510 and directly abut against the columnar structural member of the fulcrum support 530, and are located within the fixed area enclosed by the elastic inner liner of the columnar structural member. The fulcrum support 530 has multiple columnar structural members, which are evenly distributed along the length of the plate-shaped structural member. The columnar structural members of the multiple fulcrum supports 530 are set corresponding to the toothed valley bottom area of the T-shaped fulcrum groove 410. The plate-shaped structural member is welded to the inner side of the vertical plate 110 on the left and right sides of the fixed base 100. Understandably, the cylindrical structural component is composed of two symmetrical semi-cylindrical structural components that are spliced together and then fixed with bolts. When the operator needs to adjust the fulcrum of the lever arm 400, the bolts are removed to create a gap between the two semi-cylindrical structural components that make up the cylindrical structural component. This allows the fulcrum shaft 520 to move out of the fulcrum bracket 530. The operator then moves the sliding fulcrum block 510 to drive the fulcrum shaft 520 to slide along the T-shaped fulcrum groove 410. When it slides to the required fulcrum, the fulcrum shaft 520 is fixed in the space enclosed by the two symmetrical semi-cylindrical structural components and the two structural components are fixed with bolts. This ultimately achieves the adjustment, transfer, and fixation of the fulcrum.
[0042] More specifically, the adjustable fulcrum of the lever arm 400 is achieved by using an interference fit between the elastic inner liner of the fulcrum shaft 520 and the fulcrum bracket 530. The material of the elastic inner liner includes, but is not limited to, natural rubber, nitrile rubber, silicone rubber, etc., to provide a stable rotation center and ensure the accuracy of the lever arm ratio, and to prevent the fulcrum from floating, causing the lever movement trajectory to become inaccurate or the fulcrum shaft 520 to bend and deform due to excessive lever bending moment load.
[0043] In one embodiment, the pressure adaptive extrusion roller assembly 1000 further includes a limiting baffle 700, and there are multiple limiting baffles 700, which are disposed on the vertical plate 110 at both ends of the vertical guide groove 120.
[0044] In this embodiment, two limiting baffles 700 are provided corresponding to each vertical guide groove 120. The two limiting baffles 700 are disposed at both longitudinal ends of the vertical guide groove 120, that is, the top and bottom of the vertical guide groove 120. The limiting baffles 700 are fixedly connected to the fixed base 100 by bolts passing through the upright plate 110. The upright plate 110 is provided with multiple longitudinal fixing holes corresponding to the limiting baffles 700. The limiting baffles 700 are used to limit the maximum stroke of the moving part 210, prevent the moving part 210 from derailing, and protect the equipment and extend its service life.
[0045] In one embodiment, the movable component 210 includes a horizontal plate 211 and two vertical plates 212. The two vertical plates 212 are disposed at the left and right ends of the horizontal plate 211 to form a U-shaped structure. The two vertical plates 212 are slidably connected to the vertical guide groove 120.
[0046] In this embodiment, the movable part 210 has a U-shaped structure, and the two vertical plates 212 can be equipped with pulleys for sliding along the vertical guide groove 120. The horizontal plate 211 is used to connect the vertical plates 212 at the left and right ends, and the horizontal plate 211 and the two vertical plates 212 form a roller fixing space.
[0047] In another embodiment, the bottom of the movable member 210 is provided with a linear bearing to slide with the vertical guide groove 120. The outer ring of the linear bearing is press-fitted into the vertical guide groove 120, and the inner ring is interference-fitted with the movable roller frame 200, so that the movable member 210 slides along the vertical guide groove 120.
[0048] In one embodiment, the movable roller frame 200 further includes a roller mounting seat 220, which is disposed at the top of the horizontal plate 211. The roller mounting seat 220 is fixedly disposed on the movable member 210 on one side near the axis of the movable roller frame 200, and the extrusion roller 300 is connected to the movable member 210 through the roller mounting seat 220.
[0049] In this embodiment, the roller mounting base 220 is disposed within the roller fixing space enclosed by the horizontal plate 211 and the two vertical plates 212. The roller mounting base 220 is fixedly connected to the movable part 210 by bolts, and the two roller mounting bases 220 are symmetrically arranged along the axis of the fixed base 100. The two symmetrically arranged roller mounting bases 220 are used to rotatably connect the extrusion roller 300.
[0050] This invention features a pressure-adaptive extrusion roller assembly at the fixed upper end of an extrusion coating machine. This assembly works in conjunction with the machine's inherent lower roller to create a vertical extrusion effect on the material. When material enters below the extrusion roller, it pushes the movable component of the movable roller frame upwards, thereby causing the roller shaft mounting seat to move upwards. As the material thickness or hardness increases, the displacement of the movable roller frame increases, the lever arm rotation angle increases, and the torsion spring deformation increases accordingly. Consequently, the reverse torque generated by the torsion spring also increases. This increased torque is converted into downward pressure on the extrusion roller through the lever arm and roller shaft mounting seat, automatically increasing the extrusion roller's pressure on the material. This allows for automatic handling of complex materials, improving equipment applicability and increasing production efficiency.
[0051] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.
Claims
1. A pressure adaptive extrusion roll assembly for an extrusion coating machine, characterized by, Applications in extrusion coating machines, including: A fixed base is fixedly connected to the extrusion wrapping machine. The fixed base includes vertical plates on the left and right sides, and multiple vertical guide grooves are symmetrically opened on the inner side of the vertical plates along the vertical direction. A movable roller frame, the movable roller frame including movable parts, and a plurality of movable parts being slidably connected to a plurality of vertical guide grooves; The extrusion roller has its two ends rotatably connected to two symmetrically arranged movable parts. A lever arm extends along the length of the fixed base. Multiple lever arms are symmetrically arranged on the inner walls of both sides of the fixed base. One end of the lever arm is hinged to the top of the movable part, and the other end of the lever arm is hinged to the fixed base. A T-shaped fulcrum groove is also provided on the lever arm along its length. A fulcrum assembly, comprising a sliding fulcrum block and a fulcrum shaft, wherein the sliding fulcrum block is slidably connected to the T-shaped fulcrum groove, and the fulcrum shaft passes through the sliding fulcrum block in a direction perpendicular to the material movement and is connected to the fixed base at both ends; A torsion spring assembly, comprising a torsion shaft and a torsion spring, wherein the torsion shaft is arranged perpendicular to the material movement direction and is fixedly connected to the inner walls of both sides of the fixed base, and the torsion spring is sleeved on the torsion shaft, and both ends of the torsion spring are connected to the lever arm.
2. The pressure adaptive extrusion roller assembly of the extrusion wrapper of claim 1, wherein, The torsion spring also includes a fixed ring and a lever. The fixed ring is disposed at both ends of the torsion spring. One end of the lever is disposed radially along the fixed ring and extends upward. The other end of the lever is hinged to the lever arm.
3. The pressure adaptive extrusion roller assembly of the extrusion wrapper of claim 2, wherein, The torsion spring assembly also includes a preload nut, and the left and right ends of the torsion shaft are provided with threaded adjustment ends, with the preload nut screwed onto the threaded adjustment ends.
4. The pressure-adaptive extrusion roller assembly of the extrusion coating machine as described in claim 3, characterized in that, The fulcrum assembly further includes a fulcrum bracket, which is disposed on the vertical plate corresponding to the T-shaped fulcrum groove, and both ends of the fulcrum shaft are interference-fitted to the fulcrum bracket.
5. The pressure-adaptive extrusion roller assembly of the extrusion coating machine as described in claim 1, characterized in that, The pressure adaptive extrusion roller assembly also includes multiple limiting baffles, which are disposed on the vertical plate at both ends corresponding to the axial ends of the vertical guide groove.
6. The pressure-adaptive extrusion roller assembly of the extrusion coating machine as described in claim 5, characterized in that, The movable component includes a horizontal plate and two vertical plates. The two vertical plates are disposed at the left and right ends of the horizontal plate to form a U-shaped structure. The two vertical plates are slidably connected to the vertical guide groove.
7. The pressure-adaptive extrusion roller assembly of the extrusion coating machine as described in claim 6, characterized in that, The movable roller frame also includes a roller shaft mounting seat, which is disposed at the top of the horizontal plate. The roller shaft mounting seat is fixedly disposed on the movable part on one side near the axis of the movable roller frame, and the extrusion roller is connected to the movable part through the roller shaft mounting seat.