A transmission device that uses the time difference of the movement of a movable pulley block to solve the storage of the web

Abstract

A transmission device that uses the time difference of the movement of a movable pulley block to solve the storage of the web, characterized in that it includes a frame, a guide rail, a web laying trolley and a movable pulley block of the rear compensation trolley, a web storage trolley and a movable pulley block of the front compensation trolley, a front cotton conveyor curtain, a rear cotton conveyor curtain, a web inlet curtain, a cotton outlet and a web outlet curtain. The front and rear cotton conveyor curtains respectively form a closed loop after bypassing each roller. By using the time difference of the reciprocating movement of the movable pulley block of the web storage trolley and the movable pulley block of the web laying trolley, the web uniformly fed by the carding machine is stored in the sandwich channel formed by the front and rear cotton conveyor curtains. When the web laying trolley changes direction and pauses, the continuously fed web can be stored in the clamping channel to achieve the web storage function; and by precisely controlling the servo motor through an electrical program, the web wrinkles and "smiling face" phenomena are eliminated, and the uniformity of the web surface output to the web outlet curtain is ensured. The advantages of this mechanism are effectively improving the web surface quality, effectively controlling the CV value of the web, enhancing the production line efficiency, saving raw materials, and having good economic benefits.

Description

Technical Field

[0001] The present invention relates to a cross-laying device for the textile technology field, and more specifically to a transmission device that utilizes the time difference of the movement of a movable pulley group to solve the problem of web storage. Background Art

[0002] The cross-laying machine is a key device in the non-woven fabric production line, which is used to cross-lay the web conveyed by the carding machine, so as to output a web with a wide range of grammages and similar longitudinal and transverse strengths for use in water-jet needling, needle punching or other web reinforcement devices. It is a bottleneck device for increasing the production line output. The uniformity of the web output by the cross-laying machine is one of the important performance indicators of this device. In actual production, the web moves reciprocally with the trolley. When the web reaches the outlet of the laying trolley, it will move reciprocally with the laying trolley and be laid and output onto the outlet curtain. Since the laying trolley needs to decelerate, pause, accelerate, etc. during the direction change, there will be a speed change. If the control of web storage is not considered, excessive stacking of the web will occur when the laying trolley changes direction, resulting in a situation where the center is light and the edges are thick and heavy, that is, the so-called "smiling face effect". This will seriously affect the uniformity of the web, resulting in an excessive CV value of the web surface, unqualified products, and even equipment shutdown. Summary of the Invention

[0003] The purpose of the present invention is precisely to provide a web storage transmission device that can effectively improve the web surface quality, control the CV value of the web, improve the production line efficiency, save raw materials, and have good economic benefits in view of the problems existing in the operation process of the above-mentioned device.

[0004] The purpose of the present invention is achieved by the following technical solutions:

[0005] The transmission device for solving the problem of web storage by using the motion time difference of a movable pulley block in the present invention includes an integral frame composed of a front and a rear frame and upper and lower guide rails located between the front and rear frames, a laying web carriage, a rear compensation carriage, a web storage carriage, and a front compensation carriage which are installed on the upper and lower guide rails and reciprocate on the corresponding guide rails and are driven by a synchronous belt; a front cotton conveyor curtain for conveying raw materials sequentially bypasses a cotton conveyor curtain driving roller I, a supporting roller I installed on the front frame, a third guide roller installed on the front compensation carriage, passes through a deviation rectifying roller group I installed on the front frame, bypasses a tensioning roller I, a first guide roller, a fourth and a fifth guide roller installed on the web storage carriage, a pressing roller I, a second guide roller, and a web outlet roller installed on the laying web carriage, and then winds back to the cotton conveyor curtain driving roller I to form a closed loop; a rear cotton conveyor curtain for conveying raw materials bypasses a driving roller II installed on the rear frame, passes through a deviation rectifying roller group II, bypasses the web outlet roller installed on the laying web carriage, passes through a supporting roller II installed on the web storage carriage, bypasses a seventh guide roller, a pressing roller II, a sixth guide roller, a ninth guide roller installed on the rear frame, an eighth guide roller installed on the rear compensation carriage, a tensioning roller II and a tenth guide roller installed on the rear frame, and then winds back to the cotton conveyor curtain driving roller II to form a closed loop; driven by a servo motor, the front cotton conveyor curtain rotates counterclockwise as a whole, and the rear cotton conveyor curtain rotates clockwise as a whole, and they meet at the web storage carriage and the laying web carriage respectively to form a cotton outlet channel for the web 7 from the inlet curtain to the laying web carriage; the web fed uniformly from the carding machine is conveyed to the uniformly running front cotton conveyor curtain through the inlet curtain. When the web reaches the web storage carriage, it is fed into the sandwich channel of the front and rear cotton conveyor curtains running in opposite directions for commutation, and follows the carriage to reciprocate under the clamping of the rotation of the front and rear cotton conveyor curtains, and finally is output to the outlet curtain through the cotton outlet of the laying web carriage.

[0006] In the present invention, the upper and lower guide rails are respectively composed of double-row cylindrical tubes symmetrically arranged on the left and right, fixed on the front and rear frame wallboards by bolts, and form a box-shaped frame with the front and rear frames; the laying web carriage and the rear compensation carriage are connected by an outer ring synchronous belt that bypasses a carriage driving roller II equipped with a synchronous belt pulley and a corresponding outer ring guide wheel installed on the front frame, and the web storage carriage and the front compensation carriage are connected by an inner ring synchronous belt that bypasses a carriage driving roller I equipped with a synchronous belt pulley and a corresponding inner ring guide wheel installed on the rear frame. The two carriage driving rollers I and II are driven by corresponding servo motors, and groove-shaped carriage wheels are respectively installed on the upper and lower parts of the wallboard of each carriage. The laying web carriage and the web storage carriage are fixed on the lower guide rail through the carriage wheels, and the front compensation carriage and the rear compensation carriage are fixed on the upper guide rail. The carriage group connected by the synchronous belt will reciprocate synchronously on the guide rail.

[0007] In the present invention, the lapping carriage, the rear compensation carriage, the net storage carriage, and the front compensation carriage are connected in series by synchronous belts and move reciprocally on corresponding guide rails. The lapping carriage and the net storage carriage move in the same direction. When the two carriages are at the end close to the vehicle tail, the movable pulley block of the net storage carriage lags behind that of the lapping carriage in commutation. When the two carriages are at the end close to the vehicle head, the movable pulley block of the net storage carriage commutes earlier than that of the lapping carriage. Then, the clamping channel L of the front and rear cotton feeding curtains will become longer, ensuring that the excess fiber web is stored in the sandwich channel between the front and rear cotton feeding curtains during the commutation pause to achieve the net storage function.

[0008] After the transmission device of the present invention precisely controls the servo motor through a program, the fiber web storage capacity will change according to the lapping speed. When the lapping carriage commutes, V A >V B , at this time, the excess fiber web will be stored in the sandwich of the front and rear cotton feeding curtains. During the remaining time, V A <V B , and the fiber web will be evenly output onto the net output curtain, avoiding the "smiling face effect" of light in the center and heavy at the edges, thereby ensuring the uniformity of the fiber web output onto the net output curtain.

[0009] More specifically, in the present invention, the net input curtain tensioning roller and the net input curtain driving roller are both installed on the support arm of the net input component. The guide roller is installed near the net input curtain driving roller at the upper end of the front frame. The tensioning roller I in the front lower part is installed on the tensioning support arm and forms a certain angle with the first guide roller. The deviation rectifying roller group I is installed in pairs on the front frame wall panel and is located below the rear of the first guide roller. When it is detected that the front cotton feeding curtain is running off track, the air cylinder at the running-off-track end will contract to correct the cotton feeding curtain to the original position. The supporting roller I and the front lower cotton feeding curtain driving roller I are installed at the middle position of the front frame; the second guide roller and the pressing roller I are installed at the upper end of the lapping carriage wall panel. The net output rollers are installed in pairs below the pressing roller to form a cotton output port. The pressing roller I can adjust the distance between the front and rear carbon curtain clamping channels through the long round hole on the carriage wall panel; the third guide roller is installed at the lower end of the front compensation carriage wall panel, and its height is close to that of the front deviation rectifying roller of the deviation rectifying roller group; the fourth, fifth, sixth guide rollers and the pressing roller II are respectively installed on the net storage carriage wall panel and form a fiber web inlet at a certain angle. Moreover, the fourth and fifth guide rollers can be adjusted left and right through the long round holes on the carriage wall panel to ensure the smoothness of the fiber web inlet. The seventh guide roller is installed below and behind the pressing roller II, and the supporting roller II is installed below the fifth guide roller to support the cotton feeding curtain; the deviation rectifying roller group II is installed in pairs on the rear frame wall panel and is below the net output rollers of the lapping carriage. When it is detected that the rear cotton feeding curtain is running off track, the air cylinder at the running-off-track end will extend to correct the cotton feeding curtain to the original position; the eighth guide roller is installed on the rear compensation carriage wall panel, and its height is close to that of the tensioning roller. The tensioning roller is installed on the tensioning support arm. The ninth guide roller in the front lower part is installed on the rear addition wall panel. The tenth guide roller and the cotton feeding curtain driving roller II are arranged in a front-back row at the middle position of the rear frame.

[0010] When the front and rear cotton feeding curtains are working, the air cylinder expands and contracts to drive two tension arms. The tension rollers Ⅰ and Ⅱ installed on the two arms tension the front and rear cotton feeding curtains. The driving roller drives the front and rear cotton feeding curtains to rotate under the drive of the servo motor. The front cotton feeding curtain rotates counterclockwise as a whole, and the rear cotton feeding curtain rotates clockwise as a whole. The front and rear cotton feeding curtains meet at the net storage trolley and the net laying trolley respectively, and after bypassing each guide roller, a cotton outlet channel for the fiber web from the net feeding curtain to the cotton outlet of the net laying trolley is formed.

[0011] The fiber web evenly fed from the carding machine is conveyed to the front cotton feeding curtain running at a constant speed through the net feeding curtain. When the fiber web is transported to the net storage trolley by the front cotton feeding curtain, it is fed into the obliquely downward sandwich channel composed of the front and rear cotton feeding curtains that are rotating relatively for commutation, and follows the trolley to make a reciprocating motion under the clamping of the front and rear cotton feeding curtains. Then, under the clamping and rotation of the front and rear cotton feeding curtains, it reaches the cotton outlet of the net laying trolley, and finally follows the trolley to reciprocate and fold out onto the net outlet curtain to enter the next process. During this process, the fiber web is continuously output from the cotton outlet through the clamping and rotation of the front and rear cotton feeding curtains, follows the net laying trolley to make a reciprocating motion and lays the fiber web on the net outlet curtain. When the net laying trolley reaches the end of the net outlet curtain near the tail of the vehicle, the servo motor is precisely controlled by an electrical program to control the commutation of the moving pulley groups of the net storage trolley and the front compensation trolley to lag behind the moving pulley groups of the net laying trolley and the rear compensation trolley. When the net laying trolley reaches the end of the net outlet curtain near the head of the vehicle, the commutation of the moving pulley groups of the net storage trolley and the front compensation trolley is controlled to be earlier than that of the moving pulley groups of the net laying trolley and the rear compensation trolley, so as to ensure that when the fiber web evenly fed from the carding machine pauses during the commutation of the net laying trolley, the excess fiber web can be stored in the sandwich channel of the front and rear cotton feeding curtains to achieve the net storage function, and ensure the uniformity of the fiber web output to the net outlet curtain.

[0012] The working principle of the present invention is as follows:

[0013] The cross-lapper's web storage drive utilizes the time difference between the accumulator and laydown trolley pulleys, and employs precise electrical control of the servo motor to ensure that the web, fed at a constant speed from the carding machine, is evenly laid onto the exit curtain. As the web, fed at a constant speed from the carding machine, is conveyed to the accumulator trolley via the front and rear feed curtains, it is clamped and fed between the front and rear feed curtains, reaching the exit of the laydown trolley. There, it reciprocates with the trolley before being laid onto the exit curtain. Since there is a reversing stop during this process, while the fiber web is being fed in at a uniform speed, when the cotton outlet of the web laying trolley reaches both ends of the web curtain, it will slow down, stop and reverse. At this time, the web storage trolley should continue to move forward when it is near the rear end of the vehicle and should slow down, stop and reverse in advance when it is near the front end of the vehicle. Then the clamping channels of the front and rear cotton curtains will become longer, ensuring that the fiber web output speed of the cotton outlet of the web laying trolley gradually slows down until it stops. The time difference between the reversal of the two is used to store the continuously fed fiber web in the interlayer channel of the front and rear cotton curtains. After the servo motor is precisely controlled by the program, the fiber web storage capacity will change according to the web laying speed, ensuring that the fiber web output to the web curtain is uniform, avoiding the "smiley face effect" of light center and heavy edges, thereby ensuring that the fiber web output from the cotton outlet is uniform, and completing the fiber web storage function.

[0014] The beneficial effects of the present invention are as follows:

[0015] The adoption of a fiber web storage transmission device improves the uniformity of the fiber web and reduces the CV value, avoiding the "smiley face effect" of light center and heavy edges, reducing raw material consumption and winning widespread recognition from users. It also improves the equipment's working efficiency, reduces the equipment failure rate, and also increases the production capacity of the entire production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a side structural schematic diagram of the fiber web storage transmission device of the present invention.

[0017] Figure 2 Schematic diagram of the front and rear cotton curtain transmission structure of the present invention

[0018] Figure 3 Schematic diagram of the transmission structure of the trolley of the present invention

[0019] Figure 4 Schematic diagram of the fiber web transportation direction of the present invention.

[0020] Figure 5 It is a schematic diagram of the movement of the trolley of the present invention.

[0021] Figure 6 It is a schematic diagram of the clamping and reversing of the network storage trolley of the present invention.

[0022] Figure 7 This is a schematic diagram of the cotton outlet movement of the web laying trolley of the present invention.

[0023] Reference numerals in the figure: 1 - frame, 2 - rear compensation carriage, 3 - guide rail, 4 - rear cotton conveyor curtain, 5 - net storage carriage, 6 - front compensation carriage, 7 - web, 8 - web laying carriage, 9 - front cotton conveyor curtain, 10 - web inlet curtain, 11 - cotton outlet, 12 - web outlet curtain, 13 - web inlet curtain tensioning roller, 14 - web inlet curtain driving roller, 15, 20, 23, 24, 25, 27, 29, 31, 32, 33 - first to tenth guide rollers, 21, 28 - pressure rollers I, II, 22 - web outlet roller, 16, 35 - tensioning rollers I, II, 17, 30 - deviation rectifying roller sets I, II, 18, 34 - cotton conveyor curtain driving rollers I, II, 19, 26 - supporting rollers I, II, 36, 38 - outer and inner ring guide wheels, 37, 39 - carriage driving rollers I, II, 40 - outer ring synchronous belt, 41 - inner ring synchronous belt. Detailed implementation manners

[0024] The present invention will be further described below in conjunction with embodiments (accompanying drawings):

[0025] As Figure 1 、 2, as shown in FIGS. 3, the drive device for solving the problem of web storage by using the movement time difference of a movable pulley block in the present invention includes an integral frame composed of a front and rear frame 1 and upper and lower guide rails 3 located between the front and rear frames. A laying cart 8 and a rear compensation cart 2 driven by a synchronous belt, a web storage cart 5, and a front compensation cart 6 are installed on the upper and lower guide rails and reciprocate on the corresponding guide rails; the front cotton conveyor curtain 9 for conveying raw materials sequentially bypasses a cotton conveyor curtain drive roller I 18 installed on the front frame, a supporting roller I 19, a third guide roller 23 installed on the front compensation cart, passes through a deviation rectifying roller group I 17 installed on the front frame, bypasses a tensioning roller I 16, a first guide roller 15, a fourth and a fifth guide roller 24, 25 installed on the web storage cart, a pressing roller I 21, a second guide roller 20, and a web outlet roller 22 installed on the laying cart, and then winds back to the cotton conveyor curtain drive roller I 18 to form a closed loop; the rear cotton conveyor curtain 4 for conveying raw materials bypasses a cotton conveyor curtain drive roller II 34 installed on the rear frame, passes through a deviation rectifying roller group II 30, bypasses the web outlet roller 22 installed on the laying cart, passes through a supporting roller II 26 installed on the web storage cart, bypasses a seventh guide roller 29, a pressing roller II 28, a sixth guide roller 27, a ninth guide roller 32 installed on the rear frame, an eighth guide roller 31 installed on the rear compensation cart 2, a tensioning roller II 35 and a tenth guide roller 33 installed on the rear frame, and then winds back to the cotton conveyor curtain drive roller II 34 to form a closed loop; driven by a servo motor, the front cotton conveyor curtain rotates counterclockwise as a whole, and the rear cotton conveyor curtain rotates clockwise as a whole, and they meet at the web storage cart and the laying cart respectively to form a cotton outlet channel for the web 7 from the inlet curtain 10 to the laying cart 8; the web 7 fed into the machine at a constant speed by the carding machine is conveyed to the front cotton conveyor curtain 9 running at a constant speed through the inlet curtain 10. When the web reaches the web storage cart 5, it is fed into the sandwich channel of the front cotton conveyor curtain 9 and the rear cotton conveyor curtain 4 running in the opposite direction for commutation, and follows the cart to reciprocate under the clamping of the running of the front and rear cotton conveyor curtains, and finally is output to the outlet curtain 12 through the cotton outlet of the laying cart 8.

[0026] In the present invention, the upper and lower guide rails 3 are respectively composed of double-row cylindrical tubes that are symmetric left and right, fixed to the front and rear frame wallboards by bolts, and form a box-shaped frame with the front and rear frames; the laying cart 8 and the rear compensation cart 2 are connected by an outer ring synchronous belt 40 that bypasses a cart drive roller II 39 equipped with a synchronous pulley and a corresponding outer ring guide wheel 36 installed on the front frame. The web storage cart 5 and the front compensation cart 6 are connected by an inner ring synchronous belt 41 that bypasses a cart drive roller I 37 equipped with a synchronous pulley and a corresponding inner ring guide wheel 38 installed on the rear frame. The two cart drive rollers I and II are driven by corresponding servo motors, and 4 groove-shaped cart wheels are respectively installed on the upper and lower walls of each cart. The laying cart 8 and the web storage cart 5 are fixed to the lower guide rail through 8 cart wheels, and the front compensation cart 6 and the rear compensation cart 2 are fixed to the upper guide rail. The cart group connected by the synchronous belt will reciprocate on the guide rail synchronously.

[0027] In the present invention, the lapping carriage 8, the rear compensation carriage 2, the net storage carriage 5 and the front compensation carriage 6 are connected in series by a synchronous belt and form a group to reciprocate on the corresponding guide rails. The lapping carriage 8 and the net storage carriage 5 move in the same direction. When the two carriages are at one end close to the tail of the vehicle, the movable pulley group of the net storage carriage 5 lags behind that of the lapping carriage 8 in commutation. When the two carriages are at one end close to the head of the vehicle, the movable pulley group of the net storage carriage 5 commutes earlier than that of the lapping carriage 8. Then the clamping channel L of the front and rear cotton feeding curtains will become longer, ensuring that the redundant web is stored in the sandwich channel of the front and rear cotton feeding curtains during the commutation pause to achieve the net storage function.

[0028] Furthermore, in the present invention, the first guide roller 15, the tension rollers ⅠⅡ 16, the deviation rectifying roller group Ⅰ 17, the cotton feeding curtain driving roller Ⅰ 18, and the supporting roller Ⅰ 19 are installed on the front frame wallboard. The deviation rectifying roller group Ⅱ 30, the ninth guide roller 32, the tenth guide roller 33, the cotton feeding curtain driving roller Ⅱ 34, and the tension roller Ⅱ 35 are installed on the rear frame wallboard. The second guide roller 20, the pressing roller Ⅰ 21, and the net outlet roller 22 are installed on the lapping carriage wallboard. The fourth guide roller 24, the fifth guide roller 25, the supporting roller Ⅱ 26, the sixth guide roller 27, the pressing roller Ⅱ 28, and the seventh guide roller 29 are installed on the net storage carriage wallboard. The third guide roller 23 and the eighth guide roller 31 installed on the rear compensation carriage wallboard are installed on the front compensation carriage wallboard. The above-mentioned various rollers are installed on the wallboard or the support arm through pedestal bearings to form independent freely rotating bodies.

[0029] In the present invention, the net inlet tensioning roller 13 and the net inlet driving roller 14 are both installed on the support arm of the net inlet component. The guide roller 15 is installed near the net inlet driving roller 14 at the upper end of the front frame. The tensioning roller I 6 in the front lower part is installed on the tensioning support arm and forms a certain angle with the first guide roller 15. The deviation rectifying roller group I 17 is installed in pairs on the front frame wallboard and is located below and behind the first guide roller 15. When it is detected that the front cotton feeding curtain runs off track, the air cylinder at the running-off track end will contract to correct the cotton feeding curtain to the original position. The supporting roller I 19 and the front lower cotton feeding driving roller I 18 are installed at the middle position of the front frame. The second guide roller 20 and the pressing roller I 21 are installed at the upper end of the laying net trolley wallboard. The net outlet rollers 22 are installed in pairs below the pressing roller 21 to form a cotton outlet 11. The pressing roller I 21 can adjust the distance between the front and rear carbon curtain clamping channels through the long round holes on the trolley wallboard. The third guide roller 23 is installed at the lower end of the front compensation trolley wallboard, and its height is close to that of the front deviation rectifying roller of the deviation rectifying roller group 17. The fourth and fifth guide rollers 24, 25 and the sixth guide roller 27, the pressing roller II 28 are respectively installed on the storage net trolley wallboard and form a fibrous web inlet at a certain angle. Moreover, the fourth and fifth guide rollers 24, 25 can be adjusted left and right through the long round holes on the trolley wallboard to ensure the smoothness of the fibrous web inlet. The seventh guide roller 29 is installed below and behind the pressing roller II 28, and the supporting roller II 26 is installed below the fifth guide roller 25 to support the cotton feeding curtain. The deviation rectifying roller group II 30 is installed in pairs on the rear frame wallboard and is below the net outlet rollers 22 of the laying net trolley. When it is detected that the rear cotton feeding curtain runs off track, the air cylinder at the running-off track end will extend to correct the cotton feeding curtain to the original position. The eighth guide roller 31 is installed on the rear compensation trolley wallboard, and its height is close to that of the tensioning roller 35. The tensioning roller 35 is installed on the tensioning support arm. The front lower ninth guide roller 32 is installed on the rear addition wallboard. The tenth guide roller 33 and the cotton feeding driving roller II 34 are arranged in a front-back row at the middle position of the rear frame.

[0030] When the front and rear cotton feeding curtains are working, the air cylinder is ventilated and telescoped to drive two tensioning support arms. The tensioning rollers I and II 16, 35 installed on the two support arms will tension the front and rear cotton feeding curtains. The driving rollers drive the front and rear cotton feeding curtains to run under the drive of the servo motor. The front cotton feeding curtain rotates counterclockwise as a whole, and the rear cotton feeding curtain rotates clockwise as a whole. The front and rear cotton feeding curtains meet at the storage net trolley and the laying net trolley respectively, and after bypassing each guiding roller, a cotton outlet channel for the fibrous web 7 from the net inlet curtain 10 to the cotton outlet 11 of the laying net trolley is formed.

[0031] The web 7 fed into the carding machine at a constant speed is conveyed by the feeding net curtain 10 to the front cotton conveying curtain 9 running at a constant speed. When the web reaches the storage net carriage 5 during transportation by the front cotton conveying curtain 9, the web is fed into the obliquely downward sandwich channel formed by the relatively rotating front cotton conveying curtain 9 and the rear cotton conveying curtain 4 for commutation. And under the clamping operation of the front and rear cotton conveying curtains, it follows the carriage to make a reciprocating motion, and reaches the cotton outlet 11 of the laying net carriage 8 under the clamping operation of the front and rear cotton conveying curtains. Finally, it follows the carriage to reciprocate and fold and is output onto the net outlet curtain 12 to enter the next process. During this process, the web 7 is continuously output from the cotton outlet 11 through the clamping operation of the front and rear cotton conveying curtains, follows the laying net carriage 8 to make a reciprocating motion and lays the web on the net outlet curtain 12. When the laying net carriage 8 reaches one end of the net outlet curtain 12 close to the tail of the vehicle, the servo motor is precisely controlled by an electrical program to control the pulley block commutation of the storage net carriage 5 and the front compensation carriage 6 to lag behind that of the laying net carriage 8 and the rear compensation carriage 2. When the laying net carriage 8 reaches one end of the net outlet curtain 12 close to the head of the vehicle, the pulley block commutation of the storage net carriage 5 and the front compensation carriage 6 is controlled to be earlier than that of the laying net carriage 8 and the rear compensation carriage 2, ensuring that the web fed into the carding machine at a constant speed can store the excess web in the sandwich channel of the front and rear cotton conveying curtains when the laying net carriage commutes and pauses, so as to realize the function of storing the net, and ensure the uniformity of the web output to the net outlet curtain.

[0032] More specifically, in the transmission device of the present invention, the front and rear cotton conveying curtains are respectively driven by two rubber rollers installed on the front and rear frames. The two rubber rollers are driven by a servo motor. The front and rear cotton conveying curtains meet at the storage net carriage and the laying net carriage respectively, and after bypassing the guide rollers of the carriage, two closed loops are formed, thus constituting the cotton outlet channel from the feeding net curtain to the laying net carriage. As Figure 2 shown, the web 7 fed into the carding machine at a constant speed is conveyed by the feeding net curtain 10 to the front cotton conveying curtain 9 running at a constant speed. When the web reaches the storage net carriage 5, as <T Figure 3 shown, it is fed into the obliquely downward sandwich formed by the relatively rotating front cotton conveying curtain 9 and the rear cotton conveying curtain 4 for commutation, and under the clamping operation of the front and rear cotton conveying curtains, a web clamping channel L is formed, conveyed to the cotton outlet 11 of the laying net carriage 8, and follows the carriage to make a reciprocating motion, and finally is laid on the net outlet curtain to enter the next process.

[0033] During this process, the web 7 is continuously output from the cotton outlet 11 through the clamping operation of the front and rear cotton conveying curtains. When the laying net carriage 8 reaches both ends of the net outlet curtain, there is a commutation stop, while the web 7 is fed in at a constant speed. It is necessary to precisely control the servo motor by an electrical program to control the pulley block commutation of the storage net carriage 5 and the front compensation carriage 6 to lag behind or be earlier than that of the laying net carriage 8 and the rear compensation carriage 2, ensuring that the web fed into the carding machine at a constant speed can store the excess web in the sandwich channel of the front and rear cotton conveying curtains when the laying net carriage 8 commutes and pauses, so as to realize the function of storing the net.

[0034] As Figure 4 、5 , 6, and 7, the transmission device of the present invention is precisely controlled by the program to control the servo motor. The fiber web storage capacity will change according to the laying speed. When the laying trolley 8 is reversed, V A >V B At this time, the excess fiber web will be stored in the interlayer of the front and rear cotton curtains. During the rest of the time, V A <V B , the fiber web will be evenly output to the net curtain 12, avoiding the "smiley face effect" of light center and heavy edges, thereby ensuring that the fiber web output to the net curtain is uniform.

[0035] Assuming that the speed of the net laying trolley 8 is V and the acceleration is a during this process, when the net laying trolley 8 and the net storage trolley 5 move from right to left and approach the rear end of the trolley, the time for the reversal process of the net laying trolley 8, including the deceleration to zero and the acceleration to V, is

[0036] The time of the whole process

[0037] The distance traveled is

[0038] The length of the web traveled during the time Δt is

[0039] but It is the excess fiber web during reversing.

[0040] The distance traveled by the network storage trolley 5 in the time Δt is It is exactly half of the fiber web length, so the storage trolley 5 is delayed in reversing than the laying trolley 8. That's it.

[0041] When the net laying trolley 8 and the net storage trolley 5 move from left to right to the end near the front of the trolley, since the movement distance is the same, the net storage trolley starts later than the net laying trolley, and arrives at the end earlier than the net laying trolley. The time difference is Assume that the time it takes for the web-laying trolley 8 to complete the journey is T.

[0042] The movement time of the storage network trolley 5 from right to left is: T1 = T + Δt, and the average speed during this process is set to

[0043] The movement time from left to right is T2=T-Δt, and the average speed during this process is set to

[0044]

[0045] Since the distance is the same whether going from left to right or from right to left, Only in this way can it be ensured that excess web is stored when the carriage changes direction.

[0046] Assuming that the reversing time of the net storage trolley 5 and the front compensation trolley 6 is the same as that of the net laying trolley, and the acceleration is a / 2, the time and distance during reversal are:

[0047]

[0048] The movement distance of the net storage trolley 5 and the front compensation trolley 6 is the same

[0049] Depend on Figure 2 、 3 It can be seen that the length of the fiber web transported by the two carts during this process is

[0050]

[0051] At the same time, the web laying trolley 8 The length of the conveying web is

[0052] From the above, we can know that L5=L8, so it is necessary to ensure that the acceleration of the web laying trolley 8 is twice that of the web storage trolley 5, so that the fiber web can be stored and transported in time without fiber web accumulation.

[0053] According to the above calculations, when the cotton outlet 11 of the web laying trolley 8 reaches the web curtain 12 near the rear end of the vehicle, as it slows down and stops to change direction, the web storage trolley 5 will continue to move forward, and the clamping channels of the front and rear cotton curtains will become longer. The web output speed of the web outlet 11 of the web laying trolley will gradually slow down until it stops, and the continuously fed web will be stored in the interlayer channels of the front and rear cotton curtains to realize the web storage function. When the web laying trolley 8 completes the reversal, the web storage trolley 5 will change direction again, and the cotton outlet 11 will start to output the web. Then when the web laying trolley 8 and the web storage trolley 5 move together to the front end of the vehicle, the web storage trolley 5 will stop and change direction in advance, such as Figure 4 As shown, the clamping channel changes from L to L1, and the fiber web continues to be stored in the interlayer channel of the front and rear cotton curtains, completing the fiber web storage function. After the program accurately controls the servo motor, the fiber web storage capacity will change according to the laying speed, such as Figure 7 As shown, when the laying trolley 8 is reversing, V A >V B At this time, the excess fiber web will be stored in the interlayer of the front and rear cotton curtains. During the rest of the time, V A <V B , the fiber web will be evenly output to the net curtain 12, avoiding the "smiley face effect" of light center and heavy edges, thereby ensuring that the fiber web output to the net curtain is uniform.

Claims

1. A transmission device that uses the time difference of the movement of a movable pulley block to solve the storage of the web, characterized in that: The device includes an integral frame composed of a front and rear frame (1) and upper and lower guide rails (3) located between the front and rear frames, a net laying trolley (8) driven by a synchronous belt and installed on the upper and lower guide rails to reciprocate on the corresponding guide rails, a rear compensation trolley (2), a net storage trolley (5), and a front compensation trolley (6); a front cotton conveyor curtain (9) for conveying raw materials sequentially bypasses a cotton conveyor curtain driving roller I (18) installed on the front frame, a supporting roller I (19), a third guide roller (23) installed on the front compensation trolley, passes through a deviation rectifying roller group I (17) installed on the front frame, bypasses a tensioning roller I (16), a first guide roller (15), a fourth and a fifth guide roller (24, 25) installed on the net storage trolley, a pressing roller I (21), a second guide roller (20), and a net outlet roller (22) installed on the net laying trolley, and then winds back to the cotton conveyor curtain driving roller I (18) to form a closed loop; a rear cotton conveyor curtain (4) for conveying raw materials bypasses a cotton conveyor curtain driving roller II (34) installed on the rear frame, passes through a deviation rectifying roller group II (30), bypasses the net outlet roller (22) installed on the net laying trolley, passes through a supporting roller II (26) installed on the net storage trolley, bypasses a seventh guide roller (29), a pressing roller II (28), a sixth guide roller (27), a ninth guide roller (32) installed on the rear frame, an eighth guide roller (31) installed on the rear compensation trolley (2), a tensioning roller II (35) and a tenth guide roller (33) installed on the rear frame, and then winds back to the cotton conveyor curtain driving roller II (34) to form a closed loop; driven by a servo motor, the front cotton conveyor curtain rotates counterclockwise as a whole, and the rear cotton conveyor curtain rotates clockwise as a whole, and they meet at the net storage trolley and the net laying trolley respectively to form a cotton outlet channel for the fibrous web (7) from the inlet net curtain (10) to the net laying trolley (8); the fibrous web (7) fed into the device evenly from the carding machine is conveyed to the uniformly running front cotton conveyor curtain (9) through the inlet net curtain (10). When the fibrous web reaches the net storage trolley (5), it is fed into the sandwich channel of the front cotton conveyor curtain (9) and the rear cotton conveyor curtain (4) that rotate in opposite directions for commutation, and follows the trolley to reciprocate under the clamping of the rotation of the front and rear cotton conveyor curtains. Finally, it is output from the cotton outlet of the net laying trolley (8) to the outlet net curtain (12); the upper and lower guide rails (3) are respectively composed of double-row cylindrical tubes that are symmetric left and right, fixed on the front and rear frame wallboards by bolts, and form a box-shaped frame with the front and rear frames; the net laying trolley (8) and the rear compensation trolley (2) are connected by an outer ring synchronous belt (40) that bypasses a trolley driving roller II (39) equipped with a synchronous belt pulley installed on the front frame and a corresponding outer ring guide wheel (36), and the net storage trolley (5) and the front compensation trolley (6) are connected by an inner ring synchronous belt (41) that bypasses a trolley driving roller I (37) equipped with a synchronous belt pulley installed on the rear frame and a corresponding inner ring guide wheel (38). The two trolley driving rollers I and II are driven by corresponding servo motors, and each trolley is respectively equipped with 4 grooved trolley wheels up and down on its wallboard. The net laying trolley and the net storage trolley are fixed on the lower guide rail through 8 trolley wheels, and the front compensation trolley and the rear compensation trolley are fixed on the upper guide rail. The trolley groups connected by synchronous belts will reciprocate synchronously on the guide rails.

2. The transmission device for solving the storage of the web by using the time difference of the movement of the movable pulley block according to claim 1, wherein: The net laying trolley (8) and the rear compensation trolley (2), the net storage trolley (5) and the front compensation trolley (6) are connected in series by synchronous belts to form a group and reciprocate on the corresponding guide rails. The net laying trolley and the net storage trolley move in the same direction. When the two trolleys are at the end close to the tail of the vehicle, the pulley block of the net storage trolley reverses later than that of the net laying trolley. When the two trolleys are at the end close to the head of the vehicle, the pulley block of the net storage trolley reverses earlier than that of the net laying trolley. Then the clamping channel L of the front and rear cotton feeding curtains will become longer, ensuring that the excess web is stored in the sandwich channel of the front and rear cotton feeding curtains during the reversing pause, so as to realize the net storage function.

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