A material conveying and tension adjusting mechanism for a compounding machine

Abstract

The present application relates to a material conveying and tension adjusting mechanism for a compound machine, which includes a frame, and the frame is provided with: a tensioning shaft; an adjusting drive mechanism for driving the tensioning shaft to approach / away from the conveyor belt; a middle-zone tensioning roller fixedly connected to the middle of the tensioning shaft; two edge-zone tensioning rollers, which are respectively fixedly connected to both ends of the tensioning shaft, and each edge-zone tensioning roller includes a fixed cylinder and a plurality of movable blocks hinged to the fixed cylinder; an edge-zone adjusting mechanism for driving the plurality of movable blocks to expand outwards or contract inwards synchronously; a middle-zone detection roller and two edge-zone detection rollers; a middle-zone load sensor and two edge-zone load sensors; an adjustment controller configured to control the operation of the adjusting drive mechanism and the edge-zone adjusting mechanism according to the detection values of the middle-zone load sensor and the edge-zone load sensors so that the detection values of the middle-zone load sensor and the two edge-zone load sensors tend to be consistent. The present application can independently adjust the tension of the middle zone and the edge zones of the conveyor belt.

Description

Technical Field

[0001] This application relates to the technical field of conveying machinery, and particularly to a material conveying tension adjusting mechanism for a laminating machine. Background Art

[0002] A hot stamping laminating machine is a mechanical device that combines hot stamping and laminating functions, mainly used for decorative hot stamping and laminating processing of materials such as paper, plastic film, and leather. During operation, it needs to continuously convey materials through a conveyor belt, and the conveying process also needs to ensure the conveying accuracy to avoid composite misalignment affecting product quality.

[0003] In the related art, the Chinese patent with the application number CN202210684449.9 proposed a material conveying tension adjusting mechanism for a laminating machine, including a vertical moving bracket, a driving motor, rollers, a frame, a conveyor belt, a tensioning device, and a conveyor belt motor. The conveyor belt is installed on the tensioning device, the conveyor belt motor is connected to the conveyor belt, the frame is respectively fixed on both sides of the conveyor belt, the vertical moving bracket is installed on the frame and above the conveyor belt, the driving motor is installed above the vertical moving bracket, the vertical moving bracket moves up and down relative to the frame under the drive of the driving motor, the rollers are installed under the vertical moving bracket and above the conveyor belt, and it also includes a horizontal moving telescopic rod. The horizontal moving telescopic rod is fixed on the frame and parallel to the conveyor belt, and the vertical moving bracket is movably installed on the horizontal moving telescopic rod. By adjusting the downward pressure of the rollers and the downward pressure intensity of the rollers, the tension of the conveyor belt is achieved. By horizontally moving the rollers, the effect of the rollers pressing down is better and the tension force is greater.

[0004] The above-mentioned related art has the following defects: During the working process of the conveyor belt, since the middle area usually bears greater tension and load, the stretching and wear of the middle area of the conveyor belt are more serious. Moreover, the contact area between the middle area and the drum or driving wheel is larger, and the friction force is stronger. Long-term friction will also cause the material aging or deformation acceleration of the middle area, which makes the middle area of the conveyor belt more likely to become loose compared to the edge area. Therefore, when adjusting the tension of the conveyor belt, if the conveyor belt is tensioned as a whole, it is very easy to cause the edge area of the conveyor belt to be over-tightened and the damage to be aggravated. Summary of the Invention

[0005] In order to improve the problem that it is easy to cause the edge area of the conveyor belt to be over-tightened and the damage to be aggravated when adjusting the tension of the conveyor belt as a whole, this application provides a material conveying tension adjusting mechanism for a laminating machine.

[0006] The material conveying tension adjusting mechanism for a laminating machine provided by this application adopts the following technical scheme:

[0007] A material conveying tensioning adjustment mechanism for a composite machine comprises a frame, a conveyor belt is installed on the frame, and the frame is provided with:

[0008] A tensioning shaft is rotatably mounted on the frame and arranged parallel to the driving roller of the conveyor belt, and is located outside the downward section of the conveyor belt;

[0009] An adjusting driving mechanism is used to drive the tensioning shaft to approach or move away from the downward section of the conveyor belt;

[0010] A middle tensioning roller, fixedly connected to the middle of the tensioning shaft;

[0011] There are two side tensioning rollers, which are fixedly connected to both ends of the tensioning shaft, and include a fixed cylinder fixedly sleeved on the tensioning shaft and a plurality of movable blocks hinged on the fixed cylinder, wherein the movable blocks are located on the side of the fixed cylinder away from the middle tensioning roller, and the plurality of movable blocks are distributed in an evenly spaced circular array around the tensioning shaft and enclose a side tensioning cylinder;

[0012] A side zone regulating mechanism, used to drive the plurality of movable blocks to expand outwards or retract inwards synchronously;

[0013] A central detection roller and two side detection rollers, wherein the side detection roller and the central detection roller are both pressed against the outer side of the conveyor belt's downstream section, and the two side detection rollers are arranged at both ends of the central detection roller;

[0014] A middle area load sensor and two side area load sensors, respectively used to detect the pressing force between the middle area detection roller and the two side area detection rollers and the conveyor belt; and

[0015] The adjustment controller is configured to control the operation of the adjustment drive mechanism and the operation of the side area adjustment mechanism according to the detection values ​​of the middle area load sensor and the side area load sensors so that the detection values ​​of the middle area load sensor and the two side area load sensors tend to be consistent.

[0016] Furthermore, the border area adjustment mechanism includes:

[0017] An adjusting cylinder is sleeved on the outer circumference of the tensioning shaft and arranged at intervals;

[0018] A side area driving member, used for driving the adjusting cylinder to move axially along the tensioning shaft, the side area driving member being control-connected to the adjusting controller;

[0019] a permanent magnet fixedly connected to a side of the movable block close to the tensioning shaft; and

[0020] The electromagnet is installed on the peripheral side of one end of the adjusting cylinder extending into the inner side of the edge tensioning cylinder, and the electromagnet repels the permanent magnet by magnetic force after being energized and magnetized;

[0021] Wherein, when the outer side surface of the movable block is parallel to the tensioning shaft, the distance between its inner side surface and the tensioning shaft gradually decreases along the direction from the middle to the end of the tensioning shaft.

[0022] Furthermore, a limiting groove is formed through the side wall of the movable block in the circumferential direction of the tensioning shaft, the limiting groove extends along the axial direction of the tensioning shaft, and a limiting ring is penetrated through a plurality of the limiting grooves;

[0023] When the outer peripheral side of the arc surface of the limiting ring contacts the outer groove wall of the limiting groove, a gap is formed between the permanent magnet and the outer peripheral wall of the electromagnet.

[0024] Furthermore, a plurality of connecting rods hinged to the outer peripheral wall of the adjusting cylinder are hinged to the limiting ring.

[0025] Furthermore, the edge area load sensor is connected to an auxiliary controller in a control manner, the auxiliary controller is connected to the electromagnet in a control manner, and the auxiliary controller is configured to control the electromagnet to increase the magnetizing energizing current so as to increase the magnetic repulsion force of the electromagnet on the permanent magnet when the value detected by the edge area load sensor fluctuates.

[0026] Furthermore, the cross-sectional circular radius of the middle area tensioning roller decreases from the middle to the end thereof.

[0027] Furthermore, the outer diameter of the fixed cylinder is not greater than the outer diameter of the end of the middle area tensioning roller, and the minimum outer diameter of the edge area tensioning cylinder is smaller than the outer diameter of the fixed cylinder.

[0028] Furthermore, the outer side surface of the end of the movable block away from the fixed cylinder is a smooth curved surface.

[0029] Furthermore, the adjustment controller is configured to:

[0030] First, control the adjustment driving mechanism to work according to the detection value of the middle area load sensor so that the detection value of the middle area load sensor meets the required conveyor belt tension requirement;

[0031] Then, control the corresponding edge area driving member to drive the adjusting cylinder to move according to the detection value of the edge area load sensor so that the detection value of the edge area load sensor is corrected to be consistent with the detection value of the middle area load sensor.

[0032] Furthermore, the tensioning shaft is arranged upstream of the middle area detection roller along the conveying direction of the conveyor belt, a guiding roller is rotatably arranged on the frame between the tensioning shaft and the middle area detection roller, and the guiding roller abuts against the inner side of the downward conveying section of the conveyor belt.

[0033] In summary, the beneficial technical effects of the present application are as follows:

[0034] 1. During the process of the conveyor belt transporting materials, the middle area detection roller and the two edge area detection rollers are pressed against the conveyor belt, and the middle area load sensor and the two edge area load sensors are used to monitor the tension degree of the conveyor belt. When the conveyor belt shows a slack phenomenon, the value detected by the middle area load sensor is lower than the set value. The adjustment controller controls the first linear driving member to drive the tensioning shaft to move towards the conveyor belt, so that the middle area tensioning roller is more tightly pressed against the conveyor belt until the value detected by the middle area load sensor meets the set requirements, and the first linear driving member stops working, realizing the automatic adjustment of the tension degree of the middle area of the conveyor belt;

[0035] 2. The two edge area load sensors independently monitor the tension forces of the two edge areas of the conveyor belt. When the detected value of any edge area load sensor is greater than the set requirements, the adjustment controller controls the corresponding side edge area adjustment mechanism to drive the multiple movable blocks at that end to synchronously move inwards to reduce the maximum outer diameter of the edge area tensioning cylinder, thereby reducing the tension degree of the corresponding edge area of the conveyor belt, and also realizing the automatic follow-up adjustment of the edge area of the conveyor belt. Thus, through the independent adjustment of the middle area and the edge areas of the conveyor belt, each part of the cross-section of the conveyor belt can be made to be in a state of as consistent tension degree as possible, which can not only ensure the effective and accurate transportation of materials, but also avoid the damage to the conveyor belt caused by the overall adjustment of the tension degree;

[0036] 3. When the value detected by the edge area load sensor shows a fluctuating form, it indicates that the magnetic repulsion force between the electromagnet and the permanent magnet is not sufficient to stably support the edge area of the conveyor belt by the movable blocks. If the position of the adjustment cylinder is directly adjusted, it may lead to over-adjustment. At this time, with the help of the auxiliary controller, the magnetizing energizing current of the electromagnet can be increased to increase the magnetic repulsion force of the electromagnet on the permanent magnet, ensuring that the movable blocks stably push against the edge area of the conveyor belt, and realizing the high-precision adjustment of the maximum outer diameter of the edge area tensioning cylinder;

[0037] 4. Through the setting of the magnetic repulsion force between the electromagnet and the multiple permanent magnets, the movable blocks do not contact the adjustment cylinder, which can greatly reduce the wear of the adjustment cylinder and the movable blocks, and avoid the phenomenon of reduced stability when the edge area tensioning cylinder rotates; moreover, this magnetic repulsion force can also make the tension effect of the edge area tensioning cylinder formed by the multiple movable blocks on the edge area of the conveyor belt be non-rigid tension, avoiding the jamming phenomenon caused by over-tightening the edge area of the conveyor belt, and promoting the stable tension of the edge area of the conveyor belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is the overall structural schematic diagram of the embodiment of the present application;

[0039] Figure 2It is a side view of the overall structure of an embodiment of the present application;

[0040] Figure 3 It is along Figure 2 a schematic cross-sectional structure diagram taken along line A-A in

[0041] Figure 4 It is an explosion schematic diagram mainly used to show the edge tensioning roller of an embodiment of the present application;

[0042] Figure 5 It is an explosion schematic diagram mainly used to show the middle area detection roller and the edge area detection roller of an embodiment of the present application.

[0043] Explanation of reference numerals:

[0044] 1, frame; 11, conveyor belt;

[0045] 21, tensioning shaft; 22, shaft frame; 23, first linear drive;

[0046] 3, middle area tensioning roller;

[0047] 4, edge area tensioning roller; 41, fixed cylinder; 42, edge area tensioning cylinder; 43, movable block; 431, limiting groove;

[0048] 51, middle area detection roller; 52, edge area detection roller; 53, roller frame;

[0049] 61, middle area load sensor; 62, edge area load sensor;

[0050] 71, adjusting cylinder; 72, edge area drive; 73, permanent magnet; 74, electromagnet; 75, limiting ring;

[0051] 8, guide roller. Detailed implementation manners

[0052] Next, the technical solutions of the present application will be clearly and completely described in conjunction with the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0053] An embodiment of the present application discloses a material conveying tensioning and adjusting mechanism for a laminator. Referring to Figure 1 , Figure 2 and Figure 3 , it includes a frame 1, on which a conveyor belt 11 is installed, and the frame 1 is provided with:

[0054] a tensioning shaft 21, rotatably installed on the frame 1 and arranged in parallel with the driving roller of the conveyor belt 11, located outside the downward section of the conveyor belt 11;

[0055] The adjusting driving mechanism is used to drive the tensioning shaft 21 to approach / move away from the downward section of the conveyor belt 11. Specifically, it can be an axis frame 22 for installing the tensioning shaft 21 and a first linear driving member 23 for driving the axis frame 22 to move. The first linear driving member 23 can be a linear motor, an electric push rod, etc.

[0056] The middle tensioning roller 3 is sleeved and fixedly connected to the middle part of the tensioning shaft 21, and is tightly pressed against the outer wall of the middle part of the downward section of the conveyor belt 11;

[0057] There are two side tensioning rollers 4, which are fixed to both ends of the tensioning shaft 21, respectively, and include a fixed cylinder 41 fixedly sleeved on the tensioning shaft 21 and a plurality of movable blocks 43 hinged on the end surface of the fixed cylinder 41, the movable block 43 is located on the side of the fixed cylinder 41 away from the middle tensioning roller 3, and the plurality of movable blocks 43 are distributed in an evenly spaced circular array around the tensioning shaft 21 and enclose a side tensioning cylinder 42, which is pressed against the outer side wall of the side area of ​​the downward section of the conveyor belt 11;

[0058] The side zone regulating mechanism is provided with two and is used to drive a plurality of movable blocks 43 at the same end to expand outward or contract inward synchronously.

[0059] The middle detection roller 51 and two coaxially arranged side detection rollers 52, the side detection rollers 52 and the middle detection roller 51 are both pressed against the outer side of the downstream section of the conveyor belt 11, and the two side detection rollers 52 are arranged at both ends of the middle detection roller 51, specifically, the middle detection roller 51 is pressed against the outer side wall of the middle section of the downstream section of the conveyor belt 11, and the side detection rollers 52 are pressed against the outer side wall of the side section of the downstream section of the conveyor belt 11;

[0060] The middle area load sensor 61 and the two side area load sensors 62 are used to detect the pressing force between the middle area detection roller 51 and the two side area detection rollers 52 and the conveyor belt 11, respectively. The middle area load sensor 61 and the side area load sensor 62 can be pressure sensors; and

[0061] The regulating controller is configured to control the operation of the regulating driving mechanism and the operation of the side regulating mechanism according to the detection values ​​of the middle area load sensor 61 and the side area load sensors 62 so that the detection values ​​of the middle area load sensor 61 and the two side area load sensors 62 tend to be consistent.

[0062] Specifically, the regulation controller is configured as follows:

[0063] First, control and adjust the operation of the driving mechanism according to the detected value of the middle-zone load sensor 61, so that the detected value of the middle-zone load sensor 61 meets the required tension requirement of the conveyor belt 11. For example, control the first linear driving member 23 to drive the tensioning shaft 21 to move closer to the conveyor belt 11, so that the middle-zone tensioning roller 3 on the tensioning shaft 21 presses more tightly against the middle part of the conveyor belt 11, thereby increasing the detected value of the middle-zone load sensor 61.

[0064] Then, control the corresponding side-zone driving member 72 to drive the adjusting cylinder 71 to move according to the detected value of the side-zone load sensor 62, so that the detected value of the side-zone load sensor 62 is corrected to be the same as the detected value of the middle-zone load sensor 61. For example, control the side-zone adjusting mechanism to drive multiple movable blocks 43 to synchronously move inwards, so that the pressing degree between the side-zone tensioning cylinder 42 and the side part of the conveyor belt 11 is reduced, thereby reducing the detected value of the side-zone load sensor 62.

[0065] Thus, during the process of the conveyor belt 11 conveying materials, the middle-zone detection roller 51 and the two side-zone detection rollers 52 can be pressed against the conveyor belt 11, and the tension degree of the conveyor belt 11 can be monitored by means of the middle-zone load sensor 61 and the two side-zone load sensors 62. The detected value of the middle-zone load sensor 61 is used as the main judgment basis for the tension degree of the conveyor belt 11. When the conveyor belt 11 shows a slack phenomenon, the value detected by the middle-zone load sensor 61 is lower than the set value. The adjustment controller controls the first linear driving member 23 to drive the tensioning shaft 21 to move towards the conveyor belt 11, so that the middle-zone tensioning roller 3 presses more tightly against the conveyor belt 11 until the value detected by the middle-zone load sensor 61 meets the set requirements, and the first linear driving member 23 stops working, realizing the automatic adjustment of the tension degree of the middle part of the conveyor belt 11.

[0066] Since generally the slack degree of the middle part of the conveyor belt 11 is much greater than that of the side parts of the conveyor belt 11, after the above adjustment, the side parts of the conveyor belt 11 may be overly tightened, which will exacerbate the wear of the conveyor belt 11. Therefore, the tension of the two side parts of the conveyor belt 11 is independently monitored by the two side-zone load sensors 62. When the detected value of any side-zone load sensor 62 is greater than the set requirements, the adjustment controller controls the corresponding side-zone adjusting mechanism to drive the multiple movable blocks 43 at this end to synchronously move inwards to reduce the maximum outer diameter of the side-zone tensioning cylinder 42, thereby reducing the tension degree of the corresponding side part of the conveyor belt 11, and also realizing the automatic follow-up adjustment of the side parts of the conveyor belt 11.

[0067] By independently adjusting the middle area and the edge area of the conveyor belt 11, each part of the cross-section of the conveyor belt 11 can be made to be in a state of as consistent tension as possible, which can not only ensure the effective and accurate conveying of materials, but also avoid the damage to the conveyor belt 11 caused by adjusting the tension as a whole.

[0068] In order to achieve stable control of the maximum outer diameter of the rotating edge tensioning cylinder 42, referring to Figure 3 and Figure 4 , the above-mentioned edge adjustment mechanism includes:

[0069] Adjusting cylinder 71, sleeved on the outer periphery of the tensioning shaft 21 and located on the inner periphery of the edge tensioning cylinder 42. There is a gap between the inner wall of the adjusting cylinder 71 and the outer wall of the tensioning shaft 21. Specifically, the part of the tensioning shaft 21 corresponding to the adjusting cylinder 71 is set as a small-diameter part, and the part corresponding to the middle tensioning roller 3 is set as a large-diameter part to facilitate the setting of the adjusting cylinder 71 in the edge tensioning cylinder 42;

[0070] Edge driving part 72, used to drive the adjusting cylinder 71 to move axially along the tensioning shaft 21. The edge driving part 72 is controlled and connected to the adjustment controller. Specifically, the edge driving part 72 can be a high-precision linear driving part such as a linear motor or an electric push rod. The driving end of the edge driving part 72 is fixedly connected to the adjusting cylinder 71;

[0071] Permanent magnet 73, fixedly connected to the side of the movable block 43 close to the tensioning shaft 21, and is arranged longitudinally along the tensioning shaft 21 on the movable block 43; and

[0072] Electromagnet 74, installed on the circumferential side of the end of the adjusting cylinder 71 extending into the inner side of the edge tensioning cylinder 42. The magnetic field generated on the circumferential outer side after it is energized and magnetized repels the magnetic force of the permanent magnet 73;

[0073] Among them, when the outer side surface of the movable block 43 is parallel to the tensioning shaft 21, the distance between its inner side surface and the tensioning shaft 21 gradually decreases along the direction from the middle to the end of the tensioning shaft 21.

[0074] Thus, when the adjusting mechanism of the present application is working, first, the electromagnet 74 is energized. The electromagnet 74 is magnetized and generates the same magnetic repulsive force on the permanent magnets 73 on the plurality of movable blocks 43, so that when the plurality of movable blocks 43 rotate following the tensioning shaft 21, they sequentially generate the same pressing force on the edge area of the conveyor belt 11, ensuring a stable tensioning adjustment effect on the edge area of the conveyor belt 11. Moreover, by means of this magnetic repulsive force setting, the movable block 43 and the adjusting cylinder 71 do not contact each other, which can greatly reduce the wear of the adjusting cylinder 71 and the movable block 43, and avoid the phenomenon of reduced stability when the edge tensioning cylinder 42 rotates; and this magnetic repulsive force can also make the tensioning effect of the edge tensioning cylinder 42 formed by the plurality of movable blocks 43 on the edge area of the conveyor belt 11 be non-rigid tensioning, which can avoid the jamming phenomenon caused by over-tightening the edge area of the conveyor belt 11, and can promote the stable tensioning of the edge area of the conveyor belt 11.

[0075] When it is necessary to adjust the maximum outer diameter of the edge tensioning cylinder 42, for example, when the detection value of the edge load sensor 62 is greater than the set requirement, the adjustment controller controls the corresponding edge driving member 72 to work to drive the adjusting cylinder 71 to move towards the middle of the tensioning shaft 21. At this time, the distance between the electromagnet 74 and the permanent magnet 73 on the movable block 43 is reduced. Without changing the magnetizing current magnitude of the electromagnet 74, the movable block 43 approaches the tensioning shaft 21 under the push during the conveyance of the conveyor belt 11, so that the maximum outer diameter of the edge tensioning cylinder 42 is reduced, and the pressing degree of the edge tensioning cylinder 42 on the edge area of the conveyor belt 11 can be reduced, achieving the effect of reducing the tensioning degree of the edge area of the conveyor belt 11.

[0076] Further, to improve the unstable condition of the plurality of movable blocks 43 when rotating under the influence of the magnetic repulsive force, referring to Figure 3 and Figure 4 , a limiting groove 431 is formed through the side wall of the movable block 43 along the circumferential direction of the tensioning shaft 21. The limiting groove 431 extends along the axial direction of the tensioning shaft 21. A limiting ring 75 is commonly inserted into the plurality of limiting grooves 431. The groove width of the limiting groove 431 is greater than the outer diameter of the limiting ring 75;

[0077] When the outer peripheral side of the arc surface of the limiting ring 75 contacts the outer groove wall of the limiting groove 431, there is a gap between the permanent magnet 73 and the outer peripheral wall of the electromagnet 74.

[0078] In another feasible embodiment, a plurality of connecting rods (not shown in the figure) hinged to the outer peripheral wall of the adjusting cylinder 71 are also hinged to the limiting ring 75 to improve the coaxiality of the limiting ring 75 when sliding in the plurality of limiting grooves 431.

[0079] Thus, when the edge area driving member 72 drives the adjusting cylinder 71 to axially move along the tensioning shaft 21, the limiting ring 75 slides in the plurality of limiting grooves 431 of the plurality of movable blocks 43. The limiting ring 75 can limit the angle of outward turning of the movable blocks 43, so that the permanent magnets 73 on the movable blocks 43 will not be overly turned outwards under the action of the magnetic repulsive force between the electromagnets 74, which may affect the pushing effect on the conveyor belt 11, ensuring that the edge area tensioning cylinder 42 formed by the plurality of movable blocks 43 always maintains a complete cylindrical shape. At the same time, since the groove width of the limiting groove 431 is greater than the outer diameter of the limiting ring 75, the limiting ring 75 will not cause a large restriction on the movable blocks 43 when moving following the adjusting cylinder 71, so as to ensure the effective control of the magnetic repulsive force between the permanent magnet 73 and the electromagnet 74 on the turning angle of the movable blocks 43.

[0080] Moreover, when the outer peripheral side of the arc surface of the limiting ring 75 contacts the outer groove wall of the limiting groove 431, there is a gap between the permanent magnet 73 and the outer peripheral wall of the electromagnet 74. When the movable block 43 pushes against the edge area of the conveyor belt 11 to form a tensioning effect on the edge area of the conveyor belt 11, the movable block 43 will not turn inwards until the permanent magnet 73 contacts the electromagnet 74, avoiding the damage caused by the contact and sliding between the permanent magnet 73 rotating with the tensioning shaft 21 and the electromagnet 74.

[0081] Furthermore, referring to Figure 3 and Figure 5 the edge area load sensor 62 is also controllably connected to an auxiliary controller, and the auxiliary controller is controllably connected to the electromagnet 74. The auxiliary controller is configured to control the electromagnet 74 to increase the magnetically attached energizing current when the value detected by the edge area load sensor 62 shows a fluctuating pattern, so as to increase the magnetic repulsive force of the electromagnet 74 on the permanent magnet 73.

[0082] In this way, when the value detected by the edge area load sensor 62 shows a fluctuating pattern, it indicates that the magnetic repulsive force between the electromagnet 74 and the permanent magnet 73 at this time is not sufficient to stably support the edge area of the conveyor belt 11 by the movable blocks 43. If the position of the adjusting cylinder 71 is directly adjusted, it may lead to over-adjustment. At this time, with the help of the auxiliary controller, the magnetically attached energizing current of the electromagnet 74 can be increased to increase the magnetic repulsive force of the electromagnet 74 on the permanent magnet 73, ensuring that the movable blocks 43 stably push against the edge area of the conveyor belt 11, and enabling high-precision adjustment of the maximum outer diameter of the edge area tensioning cylinder 42.

[0083] In addition, referring to Figure 3 and Figure 4, the cross-sectional circular radius of the middle-zone tensioning roller 3 decreases from the middle to its ends. The outer diameter of the fixed cylinder 41 is not greater than the outer diameter of the ends of the middle-zone tensioning roller 3, and the minimum outer diameter of the edge-zone tensioning cylinder 42 is less than the outer diameter of the fixed cylinder 41, so that the middle-zone tensioning roller 3 and the edge-zone tensioning cylinders 42 at both ends are overall in a spindle shape that is thick in the middle and thin at both ends, thereby fully adapting to the partition tensioning effects of the middle zone and the edge zone. Moreover, the outer side surface of the movable block 43 away from the fixed cylinder 41 is a smooth curved surface, so as to increase the contact area between the interactive block and the edge-zone part of the conveyor belt 11 when the adjustment turning angle is changed, ensuring the tension adjustment effect on the edge-zone part of the conveyor belt 11.

[0084] Meanwhile, in order to ensure the tension adjustment effect of the middle-zone tensioning roller 3 and the edge-zone tensioning cylinders 42 at both ends on the conveyor belt 11, the tensioning shaft 21 is arranged upstream of the middle-zone detection roller 51 along the conveying direction of the conveyor belt 11, and a guide roller 8 is rotatably arranged on the frame 1 between the tensioning shaft 21 and the middle-zone detection roller 51. The guide roller 8 abuts against the inner side of the downward section of the conveyor belt 11, and the guide roller 8 is arranged close to the tensioning shaft 21. Thus, the conveyor belt 11 can be more wrapped around the outer peripheral surfaces of the middle-zone tensioning roller 3 and the edge-zone tensioning cylinders 42, making the contact area between the conveyor belt 11 and the middle-zone tensioning roller 3 and the edge-zone tensioning cylinders 42 larger, thereby ensuring the adjustment quality of the tension of the conveyor belt 11.

[0085] In addition, referring to Figure 1 and Figure 5 , the above-mentioned middle-zone detection roller 51 and edge-zone detection roller 52 are both elastically mounted on the frame 1 through roller brackets 53. A middle-zone load sensor 61 and an edge-zone load sensor 62 are arranged between the roller bracket 53 and the frame 1. Their specific structures are conventional technologies and will not be elaborated here.

[0086] The implementation principle of the material conveying tension adjustment mechanism for a laminator in an embodiment of this application is as follows:

[0087] During the process of the conveyor belt 11 conveying materials, the middle-zone detection roller 51 and the two edge-zone detection rollers 52 abut against the conveyor belt 11, and the middle-zone load sensor 61 and the two edge-zone load sensors 62 are used to monitor the tension degree of the conveyor belt 11. When the conveyor belt 11 shows a slack phenomenon, the value detected by the middle-zone load sensor 61 is lower than the set value. The adjustment controller controls the first linear driving member 23 to drive the tensioning shaft 21 to move towards the direction close to the conveyor belt 11, so that the middle-zone tensioning roller 3 abuts more tightly against the conveyor belt 11 until the value detected by the middle-zone load sensor 61 meets the set requirements, and the first linear driving member 23 stops working, realizing the automatic adjustment of the tension of the middle-zone part of the conveyor belt 11.

[0088] Then, the tension of the two edge areas of the conveyor belt 11 is independently monitored by two edge area load sensors 62. When the detected value of any one of the edge area load sensors 62 is greater than the set requirement, the adjustment controller controls the corresponding side edge area adjustment mechanism to drive the multiple movable blocks 43 at this end to synchronously close inward, so as to reduce the maximum outer diameter of the edge area tensioning cylinder 42, thereby reducing the tension of the corresponding edge area of the conveyor belt 11, and thus realizing the automatic follow-up adjustment of the edge area of the conveyor belt 11. Thus, through the independent adjustment of the middle area and the edge area of the conveyor belt 11, each part of the cross-section of the conveyor belt 11 can be made to be in a state of as consistent tension as possible, which can not only ensure the effective and accurate conveying of materials, but also avoid the damage to the conveyor belt 11 caused by the overall adjustment of the tension.

[0089] And when the detected value by the edge area load sensor 62 shows a fluctuating pattern, it indicates that the magnetic repulsion force between the electromagnet 74 and the permanent magnet 73 is not sufficient to stably support the edge area of the conveyor belt 11 by the movable block 43. If the position of the adjusting cylinder 71 is directly adjusted, it may lead to over-adjustment. At this time, with the help of the auxiliary controller, the magnetizing energizing current of the electromagnet 74 can be increased to increase the magnetic repulsion force of the electromagnet 74 on the permanent magnet 73, ensuring that the movable block 43 stably pushes against the edge area of the conveyor belt 11, and enabling high-precision adjustment of the maximum outer diameter of the edge area tensioning cylinder 42.

[0090] Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meanings understood by those of ordinary skill in the art to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not denote any order, quantity or importance, but are only used to distinguish different components. The words such as "a" or "an" do not denote a quantity limitation, but mean that there is at least one. The words such as "including" or "comprising" mean that the elements or objects appearing before "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. The words such as "upper", "lower", "left", "right" are only used to represent relative position relationships. When the absolute position of the object being described changes, the relative position relationships may also change accordingly.

[0091] The above are all the preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of this application shall be covered within the protection scope of this application.

Claims

1. A material conveying and tension adjusting mechanism for a compounding machine, comprising a frame (1), on which a conveyor belt (11) is installed, characterized in that, The frame (1) is provided with: A tensioning shaft (21) is rotatably mounted on the frame (1) and is arranged parallel to the driving roller of the conveyor belt (11), and is located outside the downward section of the conveyor belt (11); An adjusting driving mechanism is used to drive the tensioning shaft (21) to move closer to / away from the downward section of the conveyor belt (11); A middle tensioning roller (3) fixedly connected to the middle portion of the tensioning shaft (21); Two side tensioning rollers (4) are provided and are respectively fixed to the two ends of the tensioning shaft (21), and include a fixed cylinder (41) fixedly sleeved on the tensioning shaft (21) and a plurality of movable blocks (43) hinged on the fixed cylinder (41), wherein the movable blocks (43) are located on a side of the fixed cylinder (41) away from the middle tensioning roller (3), and the plurality of movable blocks (43) are distributed in an evenly spaced circular array around the tensioning shaft (21) and enclose a side tensioning cylinder (42); A side zone regulating mechanism, used for driving the plurality of movable blocks (43) to expand outwards or retract inwards synchronously; a central detection roller (51) and two side detection rollers (52), wherein the side detection roller (52) and the central detection roller (51) are both tightly pressed against the outer side of the downward section of the conveyor belt (11), and the two side detection rollers (52) are arranged at both ends of the central detection roller (51); A central area load sensor (61) and two side area load sensors (62), respectively used to detect the pressing force between the central area detection roller (51) and the two side area detection rollers (52) and the conveyor belt (11); as well as an adjustment controller configured to control the adjustment drive mechanism to operate according to the detection values ​​of the middle area load sensor (61) and the side area load sensors (62), and to control the side area adjustment mechanism to operate so that the detection values ​​of the middle area load sensor (61) and the two side area load sensors (62) tend to be consistent; The border area regulation mechanism includes: An adjustment cylinder (71) is sleeved on the outer circumference of the tensioning shaft (21) and is arranged at intervals; A side area driving member (72) is used to drive the adjusting cylinder (71) to move axially along the tensioning shaft (21), and the side area driving member (72) is controllably connected to the adjusting controller; a permanent magnet (73) fixedly connected to a side of the movable block (43) close to the tensioning shaft (21); and An electromagnet (74) is mounted on the peripheral side of one end of the adjusting cylinder (71) extending into the inner side of the edge tensioning cylinder (42), and when energized and magnetized, it repels the permanent magnet (73) by magnetic force; When the outer side surface of the movable block (43) is parallel to the tensioning shaft (21), the distance between its inner side surface and the tensioning shaft (21) tends to gradually decrease along the direction from the middle to the end of the tensioning shaft (21).

2. The material conveying and tension adjusting mechanism for a laminator according to claim 1, characterized in that, The movable block (43) is provided with a limiting groove (431) extending through a circumferential side wall of the tensioning shaft (21); the limiting groove (431) extends axially along the tensioning shaft (21); and a limiting ring (75) is provided in a plurality of the limiting grooves (431); When the outer peripheral side of the arc surface of the limit ring (75) contacts the outer groove wall of the limit groove (431), there is a gap between the outer peripheral wall of the permanent magnet (73) and the outer peripheral wall of the electromagnet (74).

3. The material conveying and tension adjusting mechanism for a laminator according to claim 2, wherein A plurality of connecting rods hinged to the outer peripheral wall of the adjusting cylinder (71) are hinged on the limit ring (75).

4. The material conveying and tension adjusting mechanism for a laminator according to claim 1, characterized in that, The edge area load sensor (62) is controllably connected to an auxiliary controller, and the auxiliary controller is controllably connected to the electromagnet (74). The auxiliary controller is configured to control the electromagnet (74) to increase the magnetic attachment energizing current when the value detected by the edge area load sensor (62) fluctuates, so as to increase the magnetic repulsion force of the electromagnet (74) on the permanent magnet (73).

5. The material conveying and tensioning adjustment mechanism for a compounding machine according to any one of claims 1-4, characterized in that, The cross-sectional circle radius of the middle area tensioning roller (3) decreases from the middle to the end thereof.

6. The material conveying and tension adjusting mechanism for a compounding machine according to claim 5, characterized in that, The outer diameter of the fixed cylinder (41) is not greater than the outer diameter of the end of the middle area tensioning roller (3), and the minimum outer diameter of the edge area tensioning cylinder (42) is smaller than the outer diameter of the fixed cylinder (41).

7. The material conveying and tension adjusting mechanism for a compounding machine according to claim 5, characterized in that, The outer side surface of the end of the movable block (43) away from the fixed cylinder (41) is a smooth curved surface.

8. The material conveying and tension adjusting mechanism for a compounding machine according to claim 1, characterized in that, The adjustment controller is configured as follows: First, control the adjustment driving mechanism to work according to the detection value of the middle area load sensor (61), so that the detection value of the middle area load sensor (61) meets the required tension requirement of the conveyor belt (11); Then, control the corresponding edge area driving member (72) according to the detection value of the edge area load sensor (62) to drive the adjusting cylinder (71) to move, so that the detection value of the edge area load sensor (62) is corrected to be consistent with the detection value of the middle area load sensor (61).

9. The material conveying and tension adjusting mechanism for a laminating machine according to claim 1, wherein, The tensioning shaft (21) is arranged upstream of the middle area detection roller (51) along the conveying direction of the conveyor belt (11). A guiding roller (8) is rotatably arranged on the frame (1) between the tensioning shaft (21) and the middle area detection roller (51), and the guiding roller (8) abuts against the inner side of the downward running section of the conveyor belt (11).

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