A strip material glue-free splicing device

Abstract

The present invention provides a strip glue-free splicing device, including a frame and a transposition strip disk thereon, a glue-free splicing mechanism, and a new and old strip wheel group, characterized in that a first deviation correction mechanism is provided on the new strip running path at the input end of the glue-free splicing mechanism, a new strip end acceleration winding mechanism is provided on the new strip running path at the output end of the glue-free splicing mechanism, and an old strip cutting and adsorption mechanism is provided on the glue-free splicing mechanism on the old strip running path, and a second deviation correction mechanism is provided on the working strip path at the output end of the glue-free splicing mechanism. It can ensure that the misalignment amount is within the range of ±0.5mm when the new and old paper tapes are connected, and it can ensure that the lateral offset amount of the paper tape is within the range of ±0.5mm during online transportation. The present invention has high accuracy, reliability, and stability, can improve equipment stability, improve product quality, and reduce labor intensity.

Description

Technical Field

[0001] The invention relates to a strip material glue-free splicing device, which is particularly suitable for use in the tobacco industry and belongs to the technical field of mechanical equipment design and manufacturing. Background Art

[0002] At present, the tipping paper of the mainstream medium and low speed winders on the market is mostly supplied by their own semi-automatic disc changing devices. Each winder generally has two tipping paper trays, namely the old paper tray and the new paper tray. After the old paper is pulled out from the old paper tray installed on the online unwinding shaft, it passes through the brake system of the online unwinding shaft, the wheel group, the limit ring, the splicing device, the paper scraping and shaping, the surface gluing, heating, the manual deviation correction device, the slitting drum and the paper rubbing drum; after the new paper is pulled out from the new paper tray installed on the spare unwinding shaft, it passes through the brake system of the spare unwinding shaft, the wheel group, the limit ring, the splicing device and the front-end acceleration device. In the actual production process, the new paper and the old paper are spliced ​​with paper tapes through the splicing device to achieve the purpose of continuous production. However, due to the actual layout and limiting technology, the effect of axial limiting the new and old papers by the limiting shaft before the splicing device is very limited, resulting in obvious misalignment of the new and old papers in the splicing section spliced ​​by the existing splicing device. The maximum misalignment can reach ±3.0mm or even more. This misalignment will directly lead to serious quality defects in the finished cigarettes, or cause obvious waste of raw and auxiliary materials. In addition, in the existing splicing technology, there will be more or less free paper tapes of a certain length at the front and rear ends of the splicing paper splicing section. When the free paper tape is subsequently cut by the cutting drum, it is very likely to form Discrete paper fragments will float uncontrollably and disorderly in the equipment, which can easily cause the rubbing board to be blocked, leading to equipment shutdown, seriously reducing the effective operation rate of the equipment, and significantly increasing the consumption and waste of raw and auxiliary materials; at the same time, because the paper tape is transported over a long distance during the tipping paper supply process, the tipping paper may produce axial deviation due to uneven tension of the paper tape, the sway of the tipping paper tray, and the deviation of the paper tape itself. At the same time, there is only one manual deviation correction device between the assembly device and the slitting drum, which cannot ensure that the real-time position of the paper tape is within a reasonable range, which may lead to serious quality defects of the finished cigarettes. Therefore, it is necessary to improve the existing technology. Summary of the invention

[0003] In order to solve the above problems, the present invention aims to provide a tape glue-free splicing device with high reliability and stability.

[0004] The present invention is completed through the following technical solutions: a device for glue-free splicing of strips, including a frame and a replacement strip disk thereon, a glue-free splicing mechanism, and a new and old strip passing wheel group, characterized in that at least a first correcting mechanism is provided on the strip running path at the input end of the glue-free splicing mechanism, a new strip end acceleration winding mechanism is provided on the new strip running path at the output end of the glue-free splicing mechanism, and at the same time, an old strip cutting and adsorption mechanism is provided on the glue-free splicing mechanism on the old strip running path, and a second correcting mechanism is provided on the working strip path at the output end of the glue-free splicing mechanism.

[0005] The first deviation-correcting mechanism comprises a passing wheel, a waist wheel and a limiting mechanism, and the passing wheel, the waist wheel and the limiting mechanism are arranged in sequence along the running direction of the new strip.

[0006] The wheel surface of the waist wheel is V-shaped with a small middle and large ends.

[0007] The waist wheel is connected to the telescopic mechanism, which includes a power cylinder and a piston rod thereon, the end of the piston rod is connected to a support, and the waist wheel is fixed to the support through bearings at both ends of its wheel axle, so that the support and the waist wheel thereon can be driven to extend or retract through the power cylinder. When extending, the new strip can be limited so that the new strip contacts the waist wheel, and the two sides of the new strip can be effectively prevented from folding or curling, thereby meeting the subsequent glue-free splicing requirements.

[0008] The limiting mechanism includes a first limiting roller and a second limiting roller arranged in parallel, and the common ends of the first and second limiting rollers are respectively connected to the corresponding transmission wheels through the corresponding seat bearings, the two transmission wheels are connected through the transmission mechanism belt, and the second limiting roller is connected to the rotary power machine, so that the first and second limiting rollers can be rotated through the transmission belt and the pulley under the drive of the rotary power machine.

[0009] The first and second limiting rollers are provided with an axial adjustment mechanism, which includes spiral grooves with opposite spiral directions respectively arranged on the roller surfaces at both ends of the first and second limiting rollers, and limiting rings respectively sleeved on both ends of the first and second limiting rollers, and a slider is provided on the inner circular wall of each limiting ring, and the slider is placed in the corresponding spiral groove, so that when the first and second limiting rollers rotate with the rotating power machine, the two limiting rings on the first and second limiting rollers will move synchronously along the corresponding first and second limiting rollers under the cooperation of the slider and the corresponding spiral groove, so as to realize the distance adjustment between the two limiting rings, so that the new and old strips are both limited in the two limiting rings, and the limiting requirements of strips of different widths can be met by adjusting the distance between the two limiting rings.

[0010] A positioning mechanism is arranged on the first and second limiting rollers, and the positioning mechanism includes two positioning rods which are respectively screwed on the seat bearings connected to the first and second limiting rollers, and the two positioning rods are respectively clamped in the grooves of the outer circle of the corresponding limiting rings, and positioning blocks are sleeved on the two positioning rods, so that when the limiting rings on the first and second limiting rollers are adjusted into place, the two positioning rods with positioning blocks thereon are screwed on the seat bearings and clamped in the grooves of the outer circle of the corresponding limiting rings, so that the positioning blocks limit the movement of the limiting rings, thereby completing the positioning of the limiting rings and preventing the limiting rings from moving any more.

[0011] The old strip cutting and adsorption mechanism includes a bracket connected to the piston rod of the power cylinder, a cutter and a paper baffle for cutting off the tail end of the old strip in the splicing section are arranged below the bracket, a suction plate is arranged above the bracket, an air cavity is arranged in the suction plate, a plurality of suction holes connected to the air cavity are arranged on the working surface of the suction plate, the air cavity is connected to the air pipe through the through hole, and the air pipe is connected to the negative pressure source, so that a negative pressure environment is formed on the working surface of the suction plate, so that after the new and old strips are glue-free pressed and spliced, the bracket is driven to retract by the piston rod of the power cylinder, so that the cutter and the paper baffle cut off the tail end section of the old strip placed between the cutter and the paper baffle during the process of retracting the piston rod of the power cylinder, and at the same time, the tail end section of the old strip is sucked by the negative pressure environment formed on the working surface of the suction plate to prevent the tail end section of the old strip from being brought into the downstream process and causing equipment failure; when splicing is not required, the piston rod of the power cylinder drives the bracket, the cutter and the paper baffle to extend out and leave the splicing station to make way for normal packaging paper transportation.

[0012] The new strip end accelerating winding mechanism comprises a winding shaft, which is connected to a winding motor through a coupling, and a through slot is provided at the front end of the winding shaft so that after the new strip end is inserted into the through slot, it can be wound on the winding shaft driven by the winding motor.

[0013] The second correcting mechanism includes a frame, a passing wheel, a waist wheel, a limiting ring and a limiting shaft arranged on the frame in sequence. The second correcting mechanism is installed on the working strip path at the output end of the glue-free splicing mechanism through the frame. The passing wheel, the waist wheel and the limiting mechanism are arranged sequentially along the running direction of the new strip. The structure of the waist wheel is the same as that of the waist wheel in the first correcting mechanism, so as to limit the online strip before it enters the winding and splicing unit.

[0014] The transposing strip disk comprises: new and old strip unwinding shafts arranged on a rotating disk and corresponding new and old strip passing wheel sets, wherein the new strip unwinding shaft is equipped with a spare receiving paper tray, and the old strip unwinding shaft is equipped with a receiving paper tray, and the new and old unwinding shafts are exchanged with the rotation of the rotating disk.

[0015] The new strip passing wheel group and the old strip passing wheel group are both composed of a plurality of passing wheels and are used for conveying the new and old strips.

[0016] The adhesive-free splicing mechanism is disposed on the working strip path at the output end and in front of the second deviation-correcting mechanism, and is provided with a strip joint detector and a scraper mechanism.

[0017] The present invention has the following advantages and effects: adopting the above scheme can improve the operating efficiency of the medium and low speed cigarette making and connecting unit, improve the quality of finished cigarettes, reduce the loss of raw and auxiliary materials, reduce the labor intensity of personnel, and at the same time can:

[0018] 1) Ensure that there are no convex shoulders before and after the splicing joint when the new and old paper tapes are connected, which greatly reduces the discrete fragments generated by the paper tape slitting and reduces the probability of equipment downtime caused by the blockage of the washboard due to discrete fragments;

[0019] 2) Ensure that the misalignment of the joints between the new and old paper tapes is within ±0.5mm, and improve the qualified rate of the length of the tipping paper for finished cigarettes;

[0020] 3) Abandon frequent manual correction of the paper tape, and ensure in real time that the axial displacement of the online paper tape is within the range of ±0.5mm when it enters the manual correction mechanism of the winding and splicing unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 for Figure 1 A partial enlarged view of

[0023] Figure 3 for Figure 2 A partial enlarged view of

[0024] Figure 4 for Figure 3 A partial enlarged view of

[0025] Figure 5 for Figure 3 Schematic diagram of waist wheel and telescopic mechanism;

[0026] Figure 6 for Figure 5 Schematic diagram of the waist wheel structure;

[0027] Figure 7 for Figure 4 Schematic diagram of the limiting mechanism in FIG.

[0028] Figure 8 for Figure 7 Schematic diagram of the limiting roller structure;

[0029] Fig. 9 for Figure 8 Schematic diagram of the limiting ring structure in FIG.

[0030] Fig.10 for Figure 3Schematic diagram of the old strip cutting and adsorption mechanism;

[0031] Fig.11 for Figure 3 Schematic diagram of the new strip end acceleration winding mechanism;

[0032] Fig.12 for Figure 2 Schematic diagram of the second deviation correcting mechanism in FIG.

[0033] Fig.13 for Fig.12 A three-dimensional diagram of the second deviation-correcting mechanism;

[0034] Fig.14 This is another structural diagram of the waist wheel;

[0035] Fig.15 This is another structural diagram of the waist wheel;

[0036] Fig.16 This is another structural diagram of the waist wheel;

[0037] Fig.17 This is a schematic diagram of the structure of the waist wheel. DETAILED DESCRIPTION

[0038] The present invention is further described below in conjunction with the accompanying drawings.

[0039] like Figure 1 The adhesive-free strip splicing device provided by the present invention comprises a conventional frame (not shown in the figure), and the following components are arranged on the conventional frame:

[0040] Conventional transposing strip disc 1, used to alternately provide production strips;

[0041] A conventional glue-free splicing mechanism 6, located below the transposed strip disc 1, is used for glue-free splicing of new and old strips;

[0042] Conventional new and old strip passing wheel groups 14 and 15 are arranged between the transposed strip disc 1 and the glue-free splicing mechanism 6, and are used to convey the new and old strips 131 and 171 respectively;

[0043] A first deviation-correcting mechanism 2 is provided on the running path of the new strip 131 at the input end of the glue-free splicing mechanism 6, a new strip end acceleration winding mechanism 3 is provided on the running path of the new strip 131 at the output end of the glue-free splicing mechanism 6, and an old strip cutting and adsorption mechanism 4 is provided on the running path of the old strip 171 on the glue-free splicing mechanism 6, and a second deviation-correcting mechanism 5 is provided on the working strip path at the output end of the glue-free splicing mechanism 6;

[0044] in:

[0045] The transposition strip material disk 1 comprises: new and old strip material unwinding shafts 12, 16 and corresponding new and old strip material passing wheel groups 14, 15 arranged on a rotating disk 11, wherein the new strip material unwinding shaft 12 is provided with a spare receiving paper tray 13 for providing a new strip material 131, and the old strip material unwinding shaft 16 is provided with a receiving paper tray 17 for providing an old strip material 171 online, and the new and old unwinding shafts 12, 16 are exchanged with each other as the rotating disk 11 rotates, and the new strip material passing wheel group 14 and the old strip material passing wheel group 15 are both composed of a plurality of passing wheels for conveying the new and old strip materials 141, 171, such as Figure 1 , Figure 2 ;

[0046] The first deviation-correcting mechanism 2 includes a passing wheel 14, a waist wheel 21 and a limiting mechanism 22 arranged on the running path of the new strip 131. Figure 3 , and the center distance L1 between the wheel 14 and the waist wheel 21 is equal to the center distance L2 between the waist wheel 21 and the limiting mechanism 22, and the distance L3 between the waist wheel 21 and the new strip 131 is 0 mm. Figure 4 , wherein: the wheel surface of the waist wheel 21 is V-shaped with a small middle and large ends, the V-shaped wheel surface has an arc θ of 110°, and the V-shaped wheel surface is a continuous arc surface, the line length L4 is 88mm, the arc radius R is 30mm, the diameter φ1 of the waist wheel 21 is 60mm, and the length L5 is 82mm, such as Figure 6 Or the V-shaped wheel surface of the waist wheel 21 is a symmetrical inclined surface with a groove in the middle, such as Fig.14 Or the V-shaped wheel surface of the waist wheel 21 is a symmetrical inclined surface connected in the middle, such as Fig.15 Or the waist wheel 21 is a circular arc wheel surface in the middle and cylindrical surfaces at both ends, and the arc length is 60mm to 80mm, and the circular arc wheel surface in the middle is continuous, such as Fig.16 , or the arc-shaped wheel surface in the middle is composed of the cylindrical wheel surface in the middle and the arc-shaped wheel surfaces at both ends, such as Fig.17 ; The waist wheel 21 is connected to the telescopic mechanism, and is extended only when the new and old strips 131 and 171 are spliced ​​to complete the limit of the new strip 131. The rest of the time, it is retracted and does not interfere with normal production. Specifically, the waist wheel 21 is fixed to the support 211 through the bearings at both ends of its wheel axle. The support 211 is fixed to the end of the piston rod 212 of the power cylinder 213. The support 211 and the waist wheel 21 thereon are driven to extend or retract through the power cylinder 213. When extended, it can limit the new strip 131 so that the new strip 131 can only be in the middle of the waist wheel 21, and can effectively prevent the two sides of the new strip 131 from folding or curling, so as to meet the subsequent glue-free splicing requirements, such as Figure 5 ;

[0047] The limiting mechanism 22 includes a first limiting roller 221 and a second limiting roller 222 arranged in parallel, which are used to synchronously limit the new and old strips 131 and 171 before glue-free splicing. Figure 4, so that the longitudinal misalignment of the new and old strips 131, 171 in the splicing section is controlled within the range of ±0.5mm;

[0048] The common ends of the first limiting roller 221 and the second limiting roller 222 are respectively connected to the corresponding pulleys through the corresponding seat bearings 228, and the two pulleys are connected through the transmission belt 227 to complete the transmission. The second limiting roller 222 is connected to the rotary power machine 226, so that the first and second limiting rollers 221 and 222 are rotated through the transmission belt 227 and the pulleys under the drive of the rotary power machine 226; an axial adjustment mechanism is arranged on the first limiting roller 221 and the second limiting roller 222, and the axial adjustment mechanism includes spirals with opposite spiral directions respectively arranged on the roller surfaces at both ends of the first and second limiting rollers 221 and 222. The spiral groove 223 is respectively sleeved on the limiting rings 224 at both ends of the first and second limiting rollers 221 and 222. A slider 2241 is provided on the inner circular wall of each limiting ring 224. The slider 2241 is placed in the corresponding spiral groove 223, so that when the first and second limiting rollers 221 and 222 rotate with the rotary power machine 226, the two limiting rings 224 on the first and second limiting rollers 221 and 222 will move synchronously along the corresponding first and second limiting rollers 221 and 222 under the cooperation of the slider 2241 and the corresponding spiral groove 223, so as to achieve the distance adjustment between the two limiting rings 224. Figure 7 , so that the new and old strips 131, 171 are both limited in the two limiting rings 224, and the limiting requirements of strips of different widths are adapted by adjusting the distance between the two limiting rings 224; a positioning mechanism is provided on the first limiting roller 221 and the second limiting roller 222, and the positioning mechanism includes two positioning rods 225 respectively screwed on the belt seat bearing 228 connecting the first and second limiting rollers 221 and 222, and the two positioning rods 225 are respectively clamped on the outer side of the corresponding limiting ring 224 The first and second limiting rollers 221 and 222 are provided with positioning blocks 229, so that when the limiting rings 224 on the first and second limiting rollers 221 and 222 are adjusted in place, the two positioning rods 225 with the positioning blocks 229 thereon are screwed on the seat bearing 228 and inserted into the corresponding grooves 2242 of the outer circle of the limiting ring 224, so that the positioning blocks 229 limit the movement of the limiting ring 224, thereby completing the positioning of the limiting ring 224 and preventing the limiting ring 224 from moving;

[0049] The glue-free splicing mechanism 6 is an original device on the winding and splicing unit, which is used to complete the glue-free splicing of the old strip 171 and the new strip 131. It includes a base 61 with a cavity inside, and an open top, bottom and front side surfaces, a driving shaft 62 and a driven shaft 63 arranged in the cavity, and both ends of which are fixed in the bearings with seats on the base 61. The common ends of the driving and driven shafts 62 and 63 are respectively provided with pulleys, and the two pulleys are connected by a synchronous belt. The driving shaft 61 is connected to the power motor, and the conventional crimping mold 69 on the driving and driven shafts 62 and 63, when splicing, the driving shaft 62 is driven by the power motor to rotate, and the driven shaft 62 is rotated synchronously and reversely through the synchronous belt and pulley, so that the conventional crimping mold 69 on the driving and driven shafts 62 and 63 are engaged to perform glue-free pressing and splicing of the new and old strips 131 and 171 therebetween;

[0050] The old strip cutting and adsorption mechanism 4 is installed on the base 61 above the passive shaft 63, which includes a bracket 41 connected to the piston rod of the power cylinder 43, a cutter 44 and a paper stopper 45 for cutting off the tail end of the spliced ​​old strip 171 are provided below the bracket 41, and a suction plate 42 is provided above, an air cavity is provided in the suction plate 42, and a plurality of suction holes 421 connected to the air cavity are provided on the working surface of the suction plate 42, the air cavity is connected to the air pipe through the through hole, and the air pipe is connected to the negative pressure source (air compressor), so that a negative pressure environment is formed on the working surface of the suction plate 42, such as Fig.10 After the new and old strips 131 and 171 are glue-free pressed and spliced, the piston rod of the power cylinder 43 drives the bracket 41 to retract, so that the cutter 44 and the paper baffle 45 cut off the tail end section of the old strip 171 sandwiched between the cutter 44 and the paper baffle 45 during the process of retracting the piston rod of the power cylinder 43, and at the same time, the negative pressure environment formed on the working surface of the suction plate 42 sucks the tail end section of the old strip 171 to prevent the tail end section of the old strip 171 from being brought into the downstream process and causing equipment failure; when splicing is not required, the active and passive shafts 62 and 63 do not rotate, and the piston rod of the power cylinder 43 drives the bracket 41, the cutter 44 and the paper baffle 45 to extend out and leave the splicing station to make way for normal tipping paper transportation;

[0051] The new strip end accelerating winding mechanism 3 comprises a winding shaft 31, which is connected to a winding motor 33 through a coupling 32. A through slot 311 is provided at the front end of the winding shaft 31, so that after the new strip end 171 is inserted into the through slot 311, it is wound on the winding shaft 31 under the drive of the winding motor 33. Fig.11 ;

[0052] The second deviation-correcting mechanism 5 includes a frame 51, a wheel 52, a waist wheel 53, a limit ring 54 and a limit shaft 55 arranged on the frame 51 in sequence, and the second deviation-correcting mechanism 5 is installed on the working strip path at the output end of the glue-free splicing mechanism 6 through the frame 51, such as Figure 1 , Figure 2 , Fig.12The center distance L6 between the passing wheel 52 and the waist wheel 53 is equal to the center distance L7 between the waist wheel 53 and the limiting shaft 55, both of which are 100mm; the distance L8 between the waist wheel 53 and the online strip is 0mm; the structure of the waist wheel 53 is the same as the waist wheel 21 in the first correcting mechanism 2, so as to limit the online strip before entering the winding and connecting unit.

[0053] On the working strip path at the output end of the glue-free splicing mechanism 6 and in front of the second deviation-correcting mechanism 5, a conventional strip joint detector and a conventional scraper mechanism are provided.

[0054] The above description is only a specific example of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution, improvement, etc. made within the principle of the present invention should be within the protection scope of the present invention.

Claims

1. A strip material glueless splicing device, comprising a frame and a transposed strip material plate thereon, a glueless splicing mechanism, and a new and old strip material passing wheel set, characterized in that At least a first deviation-correcting mechanism is provided on the strip running path at the input end of the glue-free splicing mechanism, a new strip end acceleration winding mechanism is provided on the new strip running path at the output end of the glue-free splicing mechanism, and an old strip cutting and adsorption mechanism is provided on the old strip running path of the glue-free splicing mechanism, and a second deviation-correcting mechanism is provided on the working strip path at the output end of the glue-free splicing mechanism; The first deviation-correcting mechanism comprises a passing wheel, a waist wheel and a limiting mechanism, and the passing wheel, the waist wheel and the limiting mechanism are arranged in sequence along the running direction of the new strip; The limiting mechanism includes a first limiting roller and a second limiting roller arranged in parallel, and an axial adjustment mechanism is arranged on the first and second limiting rollers, and the axial adjustment mechanism includes: spiral grooves with opposite spiral directions are respectively arranged on the roller surfaces at both ends of the first and second limiting rollers, and limiting rings are respectively sleeved on both ends of the first and second limiting rollers, and a slider is arranged on the inner circular wall of each limiting ring, and the slider is placed in the corresponding spiral groove.

2. The adhesive-free strip splicing device according to claim 1 is characterized in that The waist wheel is connected to the telescopic mechanism, which includes a power cylinder and a piston rod thereon, the end of the piston rod is connected to a support, and the waist wheel is fixed on the support through bearings at both ends of its wheel shaft.

3. The adhesive-free strip splicing device according to claim 1 is characterized in that The common ends of the first and second limiting rollers are connected to the corresponding transmission wheels through the corresponding seat bearings respectively. The two transmission wheels are connected through a transmission mechanism, and the second limiting roller is connected to the rotary power machine.

4. The adhesive-free strip splicing device according to claim 1 is characterized in that A positioning mechanism is arranged on the first and second limiting rollers, and the positioning mechanism comprises two positioning rods respectively screwed on the seat bearings connected to the first and second limiting rollers, and the two positioning rods are respectively clamped in the grooves of the outer circle of the corresponding limiting ring, and positioning blocks are sleeved on the two positioning rods.

5. The adhesive-free strip splicing device according to claim 1 is characterized in that The old strip cutting and adsorption mechanism includes a bracket connected to the piston rod of the power cylinder, a cutter and a paper baffle for cutting off the tail end of the old strip in the splicing section are arranged below the bracket, a suction plate is arranged above the bracket, an air cavity is arranged inside the suction plate, and a plurality of suction holes connected to the air cavity are arranged on the working surface of the suction plate, the air cavity is connected to the air pipe through the through hole, and the air pipe is connected to the negative pressure source.

6. The adhesive-free strip splicing device according to claim 1, characterized in that The new strip end accelerating winding mechanism comprises a winding shaft, which is connected to a winding motor through a coupling, and a through slot is arranged at the front end of the winding shaft, and the new strip end is inserted into the through slot.

7. The adhesive-free strip splicing device according to claim 1 is characterized in that The second correcting mechanism includes a frame, and a passing wheel, a waist wheel, and a limiting mechanism arranged on the frame. The second correcting mechanism is installed on the working strip path at the output end of the glue-free splicing mechanism through the frame, and the passing wheel, the waist wheel and the limiting mechanism are arranged sequentially along the running direction of the working strip.

8. The adhesive-free strip splicing device according to claim 2 or 7, characterized in that The wheel surface of the waist wheel is V-shaped with a small middle and large ends.

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