CN112622402B - Layered conveyor belt forming device and method for realizing interlayer constant tension - Google Patents
Layered conveyor belt forming device and method for realizing interlayer constant tension Download PDFInfo
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- CN112622402B CN112622402B CN202011621567.2A CN202011621567A CN112622402B CN 112622402 B CN112622402 B CN 112622402B CN 202011621567 A CN202011621567 A CN 202011621567A CN 112622402 B CN112622402 B CN 112622402B
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- tension
- adhesive tape
- roller
- constant tension
- conveyor belt
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/18—Handling of layers or the laminate
- B32B38/1825—Handling of layers or the laminate characterised by the control or constructional features of devices for tensioning, stretching or registration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
- B65H23/182—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in unwinding mechanisms or in connection with unwinding operations
- B65H23/185—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in unwinding mechanisms or in connection with unwinding operations motor-controlled
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/26—Registering, tensioning, smoothing or guiding webs longitudinally by transverse stationary or adjustable bars or rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H26/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms
- B65H26/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms responsive to presence of irregularities in running webs
- B65H26/04—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms responsive to presence of irregularities in running webs for variation in tension
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2433/00—Closed loop articles
- B32B2433/02—Conveyor belts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention discloses a layered conveyor belt forming device for realizing interlayer constant tension, which comprises a traction compacting roller and at least two constant tension devices, wherein all the constant tension devices are used for outputting constant tension rubberized fabrics and sending the rubberized fabrics into the traction compacting roller according to layers to form a layered conveyor belt. The invention also discloses a layered conveyor belt forming method for realizing interlayer constant tension, which comprises the following steps: step 1, respectively applying stretching forces F1, F2, …, fm and F1 > F2 > … > Fm to the rubberized fabric led out from the m rubberized fabric rolls; step 2, sequentially passing the rubberized fabric led out from the m rubberized fabric rolls through a traction compacting roller to carry out continuous molding; and 3, sticking non-working surface covering glue on the surface of the adhesive tape with the largest tension, and sticking working surface covering glue on the surface of the adhesive tape on the other side. According to the technical scheme, tension of each layer in the forming process is optimally set, so that better tension difference is formed, the actual length difference of the rubberized fabric is formed, and the purpose of prolonging the service life is achieved.
Description
Technical Field
The invention belongs to the technical field of conveyer belt preparation processes, and particularly relates to a layered conveyer belt forming device and method for realizing interlayer constant tension.
Background
The conveyer belt is suitable for transporting powdery and blocky materials between each working procedure and working section, is convenient and quick, has high production efficiency, and is a necessary means for continuously conveying mass materials in modern mass production. Layered conveyor belts are one of the important varieties in all conveyor belts, and are the earliest in application, the most mature in technology and the widest in application range.
The framework materials used for the layered conveyor belt are as follows:
CC56 canvas: blending polyester staple fibers and cotton into yarns, and then stranding the yarns with polyester filaments into warps; the pure blended yarn becomes weft after stranding. Interweaving the canvas by a single-layer loom. The single-layer strength is 55-80N/mm;
a cotton fiber canvas: the material is nylon 6 filaments which are twisted according to the strength grade and then are interwoven into canvas through a single-layer loom. The single-layer strength is 80-400N/mm unequal;
polyester canvas (also known as EP canvas): the polyester filaments are stranded into warps, the nylon 66 filaments are stranded into wefts, and the warps are interwoven into canvas through a single-layer loom. The single layer strength is 125-630N/mm.
The layered conveyor belt has the following characteristics:
1) The variable range is large, and the conveyor belt with any width, strength, length and other requirements can be supplied at any time according to the requirements of customers;
2) The supply period is short, and the production can be carried out at any time according to the needs of customers;
3) The belt body is soft, and under the condition of limited working conditions, a smaller transmission roller can be used without affecting the conveying of materials;
4) The application range is wide, and the rubber is combined with different rubber materials to form products with different purposes.
Because of these advantages, layered conveyor belts have taken up a large market share for years, showing a strong vitality, although conveyor belts are constantly updated.
As shown in fig. 1, the layered conveyor belt is produced by dipping canvas, rolling and hanging adhesive tape by three or four rollers, stacking the canvas layer by layer into a framework layer 10 with certain thickness and strength on an adhesive tape forming machine, attaching a working surface covering adhesive 20 on any one side of the framework layer 10, attaching a non-working surface covering adhesive 30 on the other side, forming an edge adhesive 40 on the side, and vulcanizing under certain temperature, pressure, time and other conditions to obtain a finished product.
It is generally considered that: when the strength of one canvas layer is 200N/mm, after 5 canvas layers are stacked, the strength is 1000N/mm, but in the actual production process, the strength is often far less than 1000N/mm, and the strength is only about 85% of theoretical number. Therefore, although the strength of the multi-layer stacked structure is improved from a static angle, a good use effect is not achieved in the actual use process, and the service life is shortened.
The inventor has long been engaged in conveyor belt production studies, and has conducted some studies on how to mold a layered conveyor belt and how to extend its service life.
The vast majority of conveyor belt production adopts flat plates (shown in figure 2), and the adhesive tape 50 passes through a driving roller 60 and a driven roller 70 to be connected into a ring shape for conveying materials 80 (shown in figure 3).
Because the conveyor belt is continuously held around the rollers (as shown in fig. 4), the skeleton layer necessarily forms an inner and outer ring length difference, and the outer ring canvas length of the skeleton layer and the inner ring canvas length difference are about 2% under the condition of not considering the thickness of the non-working surface.
Outer ring arc ab=2 (r+d) pi/2= (r+d) pi
Inner arc ab=2rpi/2=rpi
Inner and outer ring arc length difference ratio= (outer ring arc AB-inner ring arc AB)/inner ring arc AB
＝[(R+d)π-Rπ]/Rπ
＝d/R
Taking EP200 rubberized fabric as an example, 6 layers are stacked to form a framework layer, the total thickness of the framework layer is about 7.2mm, and the radius of the roller is 400mm
Inner and outer ring arc length phase difference ratio=7.2/400
＝1.8％
Because of the arc length ratio and unavoidable, the carcass outer layer is stretched 2 times and the carcass inner layer is compressed 2 times (one for each drive roller, driven roller) for each revolution of the conveyor belt.
The strength and comprehensive performance of the skeleton layer are suddenly reduced due to long-term high-frequency stretching fatigue and compression corrugation, so that the adhesive tape cannot bear corresponding load, the carrying capacity is greatly reduced, and the service life is seriously shortened.
The above example is still a more standard case, and some customers use even smaller transmission rollers, resulting in a larger arc length difference ratio between the inner and outer rings and a shorter service life.
Disclosure of Invention
The invention aims to provide a layered conveyor belt forming device and a layered conveyor belt forming method for realizing interlayer constant tension, which are used for optimally setting the tension of each layer in the forming process to form better tension difference, so that the actual length difference of an adhesive tape is formed, and the purpose of prolonging the service life is achieved.
In order to achieve the above object, the solution of the present invention is:
a layered conveyer belt forming device for realizing interlayer constant tension comprises a traction compacting roller and at least two constant tension devices, wherein all the constant tension devices are used for outputting a constant tension adhesive tape and sending the adhesive tape into the traction compacting roller according to layers to form a layered conveyer belt.
The constant tension device comprises a frequency modulation motor, a friction disc, two tension fixing rollers, a tension movable roller and a tension sensor, wherein the friction disc is connected with the output end of the frequency modulation motor, the frequency modulation motor is used for driving the friction disc to rotate, and the adhesive tape roll is linked with the friction disc and rotates along with the friction disc; the input end of one tension fixing roller corresponds to the output end position of the adhesive tape roll and is used for conveying the adhesive tape led out by the adhesive tape roll driven by the friction disc along the tension fixing roller; a tension movable roller is arranged below the tension fixed roller and at the other side of the friction disk and is used for receiving the rubberized fabric led out by the tension fixed roller; the other tension fixing roller and the tension fixing roller are arranged at the same horizontal position, and the two tension fixing rollers are positioned at two sides of the tension movable roller; the tension sensor is arranged on the tension movable roller and used for sensing the tension of the adhesive tape and sending the tension to the tension controller, and the tension controller adjusts the output frequency of the frequency adjusting motor so as to adjust the rotation speed of the friction disc.
The forming device further comprises a second traction compaction roller and a plurality of second constant tension devices, wherein the framework output by the traction compaction roller outputs a constant tension adhesive tape through one second constant tension device, and the adhesive tape output by the other second constant tension devices are fed into the second traction compaction roller according to layers to form the layered conveyor belt.
A layered conveyor belt forming method for realizing interlayer constant tension comprises the following steps:
F(x+1)＝F1+x·f
wherein x=1, 2, …, m-1
and 3, sticking non-working surface covering glue to the surface of the adhesive tape corresponding to the A1, and sticking working surface covering glue to the surface of the adhesive tape corresponding to the Am.
Wherein, the value of m is less than or equal to 4, and when m is more than 4, the method further comprises the following step S after the step 2: and (3) taking the molded framework as A1', repeating the steps 1-2 with other A2', … and Am ' adhesive tape rolls, and finally pasting non-working surface covering glue on the adhesive tape surface corresponding to A1' and pasting working surface covering glue on the adhesive tape surface corresponding to Am '.
After the scheme is adopted, the improvement point of the invention is as follows:
(1) The interlayer tension difference is arranged on the layered conveyor belt framework layer, so that the formed framework layer is more flexible and longer in service life;
(2) The tension between layers is the largest in the tension close to the non-working surface, gradually decreases in sequence, and the working surface is covered with glue on the outermost layer which is the lowest tension layer.
Compared with the prior art, the adhesive tape is more flexible by setting the tension difference between the framework layers of the layered conveyor belt, and the service life of the framework layers is prolonged by more than 25% compared with the adhesive tape with the same model and the same specification.
Drawings
FIG. 1 is a schematic illustration of a production flow of a prior art layered conveyor belt;
FIG. 2 is a schematic view of the structure of a flat conveyor belt;
FIG. 3 is a schematic illustration of the preparation of a flat conveyor belt;
FIG. 4 is a dimensional schematic of a conveyor belt and a rubberized fabric;
FIG. 5 is a schematic view of a layered conveyor belt;
FIG. 6 is a schematic diagram of the present invention for making a layered conveyor belt;
FIG. 7 is a schematic view of the structure of the constant tension device of the present invention;
fig. 8 is a schematic view of another angular configuration of the constant tension device of the present invention.
Detailed Description
The technical scheme and beneficial effects of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the invention provides a layered conveyor belt forming device for realizing interlayer constant tension, which comprises a traction compacting roller 2 and at least two constant tension devices, wherein all the constant tension devices are used for outputting a constant tension adhesive tape and feeding the adhesive tape into the traction compacting roller 2 according to layers after calendaring and coating to form a layered conveyor belt.
As shown in fig. 7 and 8, the constant tension device comprises a frequency modulation motor 1, a friction disc 2, two tension fixing rollers 4, a tension movable roller 5 and a tension sensor 6, wherein the friction disc 2 is connected with the output end of the frequency modulation motor 1, the frequency modulation motor 1 is used for driving the friction disc 2 to rotate, and the adhesive tape roll 3 is linked with the friction disc 2 and rotates along with the friction disc 2; the input end of a tension fixing roller 3 corresponds to the output end position of the adhesive tape roll 3 and is used for conveying the adhesive tape 7 led out by the adhesive tape roll 3 driven by the friction disc 2 along the tension fixing roller 4; a tension movable roller 5 is arranged below the tension fixed roller 4 and at the other side of the friction disc 2 and is used for receiving an adhesive tape 7 led out by the tension fixed roller 4; the other tension fixing roller 4 is arranged at the same horizontal position with the tension fixing roller 4, and the two tension fixing rollers 4 are positioned at two sides of the tension movable roller 5; the tension sensor 6 is arranged on the tension movable roller 5 and is used for sensing the tension of the adhesive tape 7 and sending the tension to the tension controller, and the tension controller adjusts the output frequency of the frequency adjusting motor 1 so as to adjust the rotation speed of the friction disc 2, thereby realizing the adjustment of the cloth releasing speed and enabling the final layered conveyer belt to reach constant tension.
When the invention works, the center of the adhesive tape roll 3 is strung into square steel, and is connected with the frequency modulation motor 1 through the friction disc 2, and the adhesive tape roll 3 is opened, so that the adhesive tape 7 passes through the tension fixing roller 4 and the tension movable roller 5; when the adhesive tape needs tension, the tension controller is input, the tolerance range (smaller, generally within +/-100N) is set, and when the tension reaches the upper limit, the tension controller outputs a command to slightly adjust the frequency of the frequency modulation motor, so that the cloth laying speed is increased; when the tension reaches the lower limit, the tension controller outputs an instruction to slightly lower the frequency of the frequency modulation motor and slow down the cloth releasing speed; through the self-adjustment, the purpose of constant tension is achieved.
The invention also provides a method for forming the layered conveyor belt with constant tension between layers, which is used for realizing the control scheme of the tension controller, and the analysis can find that the larger the tension is, the shorter the adhesive tape is under the condition that the adhesive tape width and model are the same. Conversely, the lower the tension, the longer the tape. From the previous analysis, the layer of adhesive tape (carcass inner layer 400) adjacent to the non-working face cover 300 of the roll 500 should be shortest and the layer of adhesive tape (carcass outer layer 200) adjacent to the working face cover 100 transporting the material should be longest. According to the principles described above, the tension applied to the layer of adhesive adjacent to the non-working surface covering adhesive 300 is greatest, whereas the tension applied to the layer of adhesive adjacent to the working surface covering adhesive 100 is smallest. The middle layers of tape are progressively decremented according to the principles described above (as shown in figure 5).
When the layered conveyor belt skeleton layer is actually formed, the constant tension device is used for tension forming, and the layered conveyor belt skeleton layer is produced in a flat plate mode, because of the limitation of equipment and the uncertainty of the layer number, 4 layers (shown in fig. 6) are formed at most at one time, and more than 4 layers are formed, so that secondary or multiple forming is needed.
The fabric is stretched by a constant tension device according to a preset tension value, and the tension F1 is more than F2 and more than F3 and more than F4, so that the corresponding fabric length is equal to 1< 2< 3< 4.
Wherein: f2 =f1+f
F3＝F1+2f
F4＝F1+3f
Wherein F1 and F are determined according to the model, specification and manufacturer of the adhesive tape.
The tension of each layer is constant in the forming process, and the layers are rolled and compacted into a whole by a traction compaction roller, and corresponding marks (particularly marks which are the first layers) are made.
When the customer meets more than 4 layers of requirements, the method is generally carried out through secondary molding, the method is similar to the primary molding, only a part of the skeleton formed at one time is used as a first layer of secondary molding, and the tension required by the part of the skeleton during secondary molding is approximately equal to the sum of the tensions of all layers during primary molding (the specific numerical value is determined by experiments of technical departments).
The first layer has the greatest tension and the shortest adhesive tape is consumed, and the shortest adhesive tape is abutted against the non-working surface according to the previous analysis; the tension is the smallest, the adhesive tape consumed is the longest, and the working surface is connected.
With the aid of FIG. 6, rolls A1, A2, A3 and A4 are hung according to molding requirements, the constant tension devices based on FIG. 7 and FIG. 8 provide tension forces F1, F2, F3 and F4 for the rubberized fabric output by each roll, continuous molding is carried out under the action of a traction compaction roller 8, wherein F1 is greater than F2 and greater than F3 is greater than F4,
and such that f2=f1+f
F3＝F1+2f
F4＝F1+3f
After the framework layer is formed, the non-working surface covering glue is stuck to the surface of the adhesive tape corresponding to F1, and the working surface covering glue is stuck to the other surface.
The strip is vulcanized to form a finished product, and the process is carried out according to the original process.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereto, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the present invention.
Claims (3)
1. A layered conveyor belt forming method for realizing interlayer constant tension is characterized in that:
the layered conveyor belt forming device comprises a traction compacting roller and at least two constant tension devices, wherein all the constant tension devices are used for outputting constant tension rubberized fabrics and sending the rubberized fabrics into the traction compacting roller according to layers to form a layered conveyor belt;
the constant tension device comprises a frequency modulation motor, a friction disc, two tension fixing rollers, a tension movable roller and a tension sensor, wherein the friction disc is connected with the output end of the frequency modulation motor, the frequency modulation motor is used for driving the friction disc to rotate, and the adhesive tape roll is linked with the friction disc and rotates along with the friction disc; the input end of the first tension fixing roller corresponds to the output end of the adhesive tape roll, and is used for conveying the adhesive tape led out by the adhesive tape roll driven by the friction disc along the first tension fixing roller; a tension movable roller is arranged below the first tension fixed roller and on the other side of the friction disc and is used for receiving the rubberized fabric led out by the first tension fixed roller; the second tension fixing roller and the first tension fixing roller are arranged at the same horizontal position, and the two tension fixing rollers are positioned at two sides of the tension movable roller; the tension sensor is arranged on the tension movable roller and used for sensing the tension of the adhesive tape and sending the tension to the tension controller, and the tension controller adjusts the output frequency of the frequency adjusting motor so as to adjust the rotation speed of the friction disc;
the forming device further comprises a second traction compaction roller and a plurality of second constant tension devices, wherein the framework output by the traction compaction roller outputs a constant tension adhesive tape through one second constant tension device, and the adhesive tape output by the other second constant tension devices are fed into the second traction compaction roller according to layers to form a layered conveying belt;
the method comprises the following steps:
step 1, applying tensile forces F1, F2, … and Fm to the rubberized fabrics led out by the m rubberized fabric rolls A1, A2, … and Am, wherein F1 > F2 > … > Fm, and the tensile forces are as follows:
F(x+1)=F1+x•f
wherein x=1, 2, …, m-1
Step 2, sequentially passing the rubberized fabric led out by the m rubberized fabric rolls A1, A2, … and Am through a traction compacting roller to continuously form;
and 3, sticking non-working surface covering glue to the surface of the adhesive tape corresponding to the A1, and sticking working surface covering glue to the surface of the adhesive tape corresponding to the Am.
2. The layered conveyor belt forming method for realizing interlayer constant tension according to claim 1, wherein: wherein m is less than or equal to 4.
3. The layered conveyor belt forming method for realizing interlayer constant tension according to claim 1, wherein:
when m >4, step S is further included after step 2: and (3) taking the molded framework as A1', repeating the steps 1-2 with other A2', … and Am ' adhesive tape rolls, and finally pasting non-working surface covering glue on the adhesive tape surface corresponding to A1' and pasting working surface covering glue on the adhesive tape surface corresponding to Am '.
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| CN202011621567.2A CN112622402B (en) | 2020-12-30 | 2020-12-30 | Layered conveyor belt forming device and method for realizing interlayer constant tension |
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| CN202011621567.2A CN112622402B (en) | 2020-12-30 | 2020-12-30 | Layered conveyor belt forming device and method for realizing interlayer constant tension |
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| CN2853832Y (en) * | 2005-12-12 | 2007-01-03 | 江苏万工科技集团有限公司 | Take-up constant tension control mechanism of weaver |
| CN101797807B (en) * | 2010-03-30 | 2012-08-29 | 河北昊德橡塑有限公司 | Equipment for manufacturing rubber conveyer belt |
| CN216139618U (en) * | 2020-12-30 | 2022-03-29 | 江苏凯嘉橡胶科技股份有限公司 | Layered conveyor belt forming device capable of realizing interlayer constant tension |
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