Magnetic screen door screen cutting and blanking device

Abstract

The application discloses a kind of magnetic screen door screen cutting blanking equipment, including synchronous movement and on-line continuous conveying screen clamping cutting assembly one and clamping cutting assembly two;Clamping cutting assembly one and clamping cutting assembly two all include conveying part and the clamping part installed on conveying part, two flexible clamping parts are installed on clamping part, and two flexible clamping parts are suitable for flexible clamping screen;Clamping cutting assembly one is installed with compensation part, and clamping cutting assembly two is installed with cutting part corresponding to the position of compensation part;Compensation part is suitable for outside top tensioning screen clamped by two flexible clamping parts;Cutting part is suitable for on-line cutting screen outside top tensioned at compensation part.In cutting, vertical pressure is applied to screen close to cutting port during continuous conveying, and screen clamped by adjacent two sets of clamping parts is tensioned using clamping part during continuous conveying, so that on-line continuous conveying, clamping, tensioning and efficient and high-quality cutting of screen can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of screen cutting equipment, in particular to a kind of magnetic screen door screen automatic clamping regular conveying and cutting equipment. BACKGROUND

[0002] Screen, good toughness, corrosion resistance, widely used in home office hotel etc. Mosquitoes, when opening the window, block mosquitoes, flies and other insects from flying in and crawling in, and can filter out some debris entering the room, and play the role of decorating doors and windows and rooms etc. Commonly used screen has glass fiber yarn, polyester yarn and SPL yarn. In the production and processing of magnetic screen door, the important part--screen needs to be cut, and cutting device is essential.

[0003] In the prior art, the means of screen cutting is basically the cycle steps of feeding-cutting-feeding, and feeding needs to be carried out after cutting. If they work at the same time, interference will occur between them, so a certain time difference must be met between the two actions, which causes slow rhythm and cannot be cut continuously and efficiently online. For example: CN112140238A discloses a hot melt type cutting device for screen production, CN110883797A discloses a screen edge pressing cutting device, and other technical documents have the above problems. For example, CN110861132A discloses a cutting machine for screen production and processing, which can realize online conveying and cutting, but cannot guarantee the cutting quality, because there is no screen tensioning or pressing structure on the side of the cutting device away from the screen, which will inevitably cause problems such as poor straightness of the cutting seam when cutting the screen (since the screen also has a certain flexibility). SUMMARY

[0004] The present application aims to solve the problem that the existing screen cutting device cannot continuously convey and efficiently and high-quality cut, resulting in slow screen production rhythm. To solve this problem, the inventor has obtained a kind of device that eliminates the interference between screen and cutting part in the conveying direction, vertically presses the screen close to the cutting opening during cutting, and simultaneously uses the clamping part to tension the screen clamped by the adjacent two groups of clamping parts during continuous conveying, so that the screen can be continuously conveyed, clamped, tensioned and efficiently and high-quality cut online.

[0005] The specific scheme is as follows: a kind of magnetic screen door screen cutting equipment, including synchronous movement and online continuous conveying screen clamping cutting assembly one and clamping cutting assembly two;

[0006] The clamping and cutting assembly one and the clamping and cutting assembly two each comprise a conveying part and a clamping part mounted on the conveying part, the clamping part is provided with two flexible clamping members adapted to flexibly clamp the screen; the clamping and cutting assembly one is provided with a compensation member, and the clamping and cutting assembly two is provided with a cutting member corresponding to the position of the compensation member;

[0007] The compensation member is adapted to externally pull the screen clamped by the two flexible clamping members;

[0008] The cutting member is adapted to cut the screen externally pulled at the compensation member.

[0009] On the basis of the above scheme, the two flexible clamping members are symmetrically arranged, the flexible clamping member comprises a rotating rod fixedly mounted on the clamping member, a torsional spring one is mounted at the rotating joint of the rotating rod and the clamping part, and a clamping body is rotatably mounted at the free end of the rotating rod.

[0010] On the basis of the above scheme, the two clamping bodies are clamping rollers, and the two clamping bodies and the corresponding rotating rods are connected through one-way rotating structures.

[0011] On the basis of the above scheme, one of the clamping bodies is a clamping roller, a torsional spring two is mounted at the rotating joint of the other clamping body, and the elastic coefficient of the torsional spring one is greater than that of the torsional spring two.

[0012] On the basis of the above scheme, the clamping body on which the torsional spring two is mounted is provided with a roller tensioning surface and a flattening clamping surface, the roller tensioning surface is located on the side close to the compensation member and the cutting member, and the flattening clamping surface is located on the side away from the compensation member and the cutting member.

[0013] On the basis of the above scheme, the compensation member comprises a vertical guide groove one arranged on the clamping part of the clamping and cutting assembly one and a wedge-shaped block one arranged on the conveying part frame, a guide rod one is mounted in the vertical guide groove one, one end of the guide rod one is exposed outside the clamping part, a connecting rod one is fixed on the guide rod one and vertically slidably inserted into the inside of the clamping part, a return spring one is sleeved on the outside of the connecting rod one, the bottom of the return spring one abuts against the inside of the clamping part, the bottom end of the connecting rod one is exposed outside the clamping part and located between the two flexible clamping members, a pressing rod is fixedly mounted at the bottom of the connecting rod one, and a cutting slot is mounted on the pressing rod.

[0014] The improvements are as follows on the basis of the above scheme: the cutting member comprises two vertical guide grooves arranged on the clamping portions of the two clamping and cutting assemblies and two wedge blocks arranged on the frame of the conveying portion, the two vertical guide grooves are internally provided with two guide rods, one end of each guide rod is exposed outside the clamping portion, the guide rod is fixedly provided with a connecting rod vertically slidingly arranged in the clamping portion, the connecting rod is externally provided with a reset spring, the bottom of the reset spring abuts against the inner side of the clamping portion, the top end of the connecting rod is exposed outside the clamping portion and located between the two flexible clamping members, and the top of the connecting rod is fixedly provided with a cutter.

[0015] The improvements are as follows on the basis of the above scheme: the conveying portion comprises two parallel conveying belts, and the clamping portion comprises a connecting plate longitudinally arranged on the two conveying belts.

[0016] A method for continuously cutting screen cloth on line by using a magnetic screen door screen cloth cutting and blanking device, the steps for continuously cutting screen cloth on line are as follows:

[0017] S100: cutting and trimming one end of the screen cloth according to the design size requirement and feeding the screen cloth on line, and installing a pair of rollers at the feeding end of the cutting device, the pair of rollers keep a certain resistance at the feeding end to ensure that the screen cloth on line does not change significantly in curling or bending during the feeding process, the clamping and cutting assembly one and the clamping and cutting assembly two clamp and convey the screen cloth through the two conveying portions, the flexible clamping member close to the cutting station side clamps and moves the screen cloth away from the cutting station side first, the screen cloth clamped by the flexible clamping member away from the cutting station side of the previous clamping portion and the flexible clamping member close to the cutting station side of the current clamping portion is tensioned and flattened on line in the reverse direction, then the flexible clamping member away from the cutting station side clamps the screen cloth again and is separated from the flexible clamping member close to the cutting station side, and simultaneously the flexible clamping member away from the cutting station side pushes the screen cloth to the front side for supply;

[0018] S200: after the screen cloth is clamped and conveyed to the cutting station, the positions of the wedge block one and the wedge block two correspond, the wedge block one and the wedge block two simultaneously act on the guide rod one to vertically slide along the vertical guide groove one, compress the reset spring one, act on the connecting rod one to externally push the screen cloth by the pressing rod, the guide rod two vertically slides along the vertical guide groove two, compresses the reset spring two, act on the connecting rod two to externally push the screen cloth by the cutter, and the screen cloth is accurately cut at the seam of the pressing rod, the screen cloth is clamped between the flexible clamping member close to the cutting station side and the flexible clamping member away from the cutting station side of the current two position corresponding clamping portions.

[0019] Beneficial effects: the present application solves the problem that the existing gauze cutting device cannot continuously transport online and cut efficiently and with high quality, resulting in slow gauze production rhythm. The scheme continuously transports the gauze online through two clamping and cutting assemblies, wherein the clamping part clamps and tensions the gauze inside the clamping part, also clamps and tensions the clamped part between the clamping parts, and realizes online efficient and high-quality cutting through the cooperation of the compensation part and the cutting part during continuous gauze transportation, thereby eliminating the interference problem of the gauze and the cutting part in the transportation direction. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the present application;

[0021] Figure 2 is a partial enlarged view of the clamping part clamping the gauze during transportation of an embodiment of the present application;

[0022] Figure 3 is a partial enlarged view of the clamping part during cutting of an embodiment of the present application;

[0023] Figure 4 is a partial enlarged view of the clamping part after cutting of an embodiment of the present application;

[0024] Figure 5 is a connection relationship diagram of the roller body and the rotating rod of an embodiment of the present application;

[0025] Figure 6 is a partial enlarged view of the clamping part clamping the gauze during transportation of an embodiment of the present application;

[0026] Figure 7 is a partial enlarged view of the clamping part during cutting of an embodiment of the present application;

[0027] Figure 8 is a cross-sectional view of the compensation part of an embodiment of the present application;

[0028] Figure 9 is a cross-sectional view of the cutting part of an embodiment of the present application;

[0029] Figure 10 is a top view of the overall structure of the present application.

[0030] In the figure:

[0031] 10, clamping and cutting assembly one; 11, compensation part; 111, vertical guide groove one; 112, wedge block one; 113, guide rod one; 114, connecting rod one; 115, return spring one; 116, pressing rod; 117, cutting gap;

[0032] 20. Clamping and cutting assembly two; 21. Cutting piece; 211. Vertical guide groove two; 212. Wedge block two; 213. Guide rod two; 214. Connecting rod two; 215. Return spring two; 216. Cutting blade;

[0033] 30. Conveying section;

[0034] 40. Clamping part; 41. Flexible clamping component; 411. Rotating rod; 412. Torsion spring one; 413. Clamping body; 4131. Roller tensioning surface; 4132. Flat clamping surface; 414. Torsion spring two; 415. Unidirectional rotation structure. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0036] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] Example 1, as Figures 1 to 3 As shown, a magnetic mesh screen cutting and feeding device includes a clamping and cutting assembly 10 and a clamping and cutting assembly 20 that move synchronously and continuously convey the mesh online. Both the clamping and cutting assembly 10 and the clamping and cutting assembly 20 include a conveying part 30 and a clamping part 40 installed on the conveying part 30. Two flexible clamping members 41 are installed on the clamping part 40, which are adapted to flexibly clamp the mesh. A compensation member 11 is installed on the clamping and cutting assembly 10, and a cutting member 21 corresponding to the position of the compensation member 11 is installed on the clamping and cutting assembly 20. The compensation member 11 is adapted to externally tension the mesh clamped by the two flexible clamping members 41. The cutting member 21 is adapted to cut the externally tensioned mesh at the compensation member 11 online.

[0038] The gauze is clamped and fixed by two flexible clamping pieces 41 on the corresponding clamping portions 40 of the clamping and cutting assembly one 10 and the clamping and cutting assembly two 20, the clamped gauze is close to each other, and the gauze clamped by the adjacent two clamping portions 40 on the clamping and cutting assembly is also tensioned and flattened, the clamped gauze is close to each other, and wrinkles appear at this time, at this time, the gauze is externally pressed and tensioned by the compensation piece 11 between the two flexible clamping pieces 41, and finally the gauze tensioned in the conveying process is accurately cut at the compensation piece 11 by the cutting piece, and the conveying component 30 serves as a power source for conveying the gauze by the clamping and conveying assembly.

[0039] In the embodiment 2, the following preferred mode is adopted on the basis of the embodiment 1: the two flexible clamping pieces 41 are symmetrically arranged, the flexible clamping piece 41 comprises a rotating rod 411 fixedly installed on the clamping portion 40, a torsional spring one 412 is installed at the rotating joint of the rotating rod 411 and the clamping portion 40, and a clamping body 413 is rotatably installed at the free end of the rotating rod 411.

[0040] The rotating rod 411 and the clamping portion 40 adopt the torsional spring one 412, which can ensure that the clamping bodies 413 on the corresponding two rotating rods 411 of the clamping and conveying assembly one 10 and the clamping and conveying assembly two 20 are clamped on the gauze, and then gradually close to the middle part of the clamping portion 40 to gather the gauze, and then gradually tension and flatten the gauze clamped by the clamping portion 40 and the front clamping portion 40.

[0041] One situation: as shown in Figure 3 , the two clamping bodies 413 are clamping rollers, and the two clamping bodies 413 and the corresponding rotating rods 411 are connected through one-way rotating structures 415 (as shown in Figure 5 ). The one-way rotating structure 415 adopts a ratchet and pawl one-way transmission structure, so that when the compensation piece 11 externally presses the gauze part that is close to each other after clamping, it can only be gathered to the middle part of the clamping portion 40 in one direction, and even after cutting is completed, it will not be loose.

[0042] Another situation: as shown in Figure 6 and Figure 7 , one clamping body 413 is a clamping roller, a torsional spring two 414 is installed at the rotating joint of the other clamping body 413 (away from the cutting station side), the elastic coefficient of the torsional spring one 412 is greater than that of the torsional spring two 414, the clamping body 413 on which the torsional spring two 414 is installed is provided with a roller tensioning surface 4131 and a flattening clamping surface 4132, the roller tensioning surface 4131 is located on the side close to the compensation piece 11 and the cutting piece 21, and the flattening clamping surface 4132 is located on the side away from the compensation piece 11 and the cutting piece 21. By stably clamping the side away from the cutting station, it is ensured that the next group of clamping portions 40 will not be loose when cutting the gauze.

[0043] Example 3, based on the above examples, adopts the following preferred method: such as Figure 8 As shown, the compensation component 11 includes a vertical guide groove 111 arranged on the clamping part 40 of the clamping and cutting assembly 10 and a wedge block 112 arranged on the frame of the conveying part 30. A guide rod 113 is installed inside the vertical guide groove 111, and one end of the guide rod 113 is exposed outside the clamping part 40. A connecting rod 114 is fixed on the guide rod 113 and is vertically slidably inserted into the inner side of the clamping part 40. A return spring 115 is fitted on the outer side of the connecting rod 114. The bottom of the return spring 115 abuts against the inner side of the clamping part 40. The bottom end of the connecting rod 114 is exposed outside the clamping part 40 and is located between two flexible clamping components 41. A pressure rod 116 is fixedly installed at the bottom of the connecting rod 114 (elastic telescopic rod), and a cutting slit 117 is installed on the pressure rod 116. After cutting, since the connecting rod 414 is an elastic telescopic rod, it will inevitably lose the reaction force it experienced when the mesh was taut. Consequently, while resetting, the connecting rod 414 will also tend to move the pressure rod 116 closer to the cutting piece 21 under the action of its own elastic element. When one end of the guide rod 113 contacts the wedge block 112, it will gradually compress the return spring 115 along the vertical guide groove 111 towards the side closer to the cutting piece 21. The connecting rod 414 will gradually push the mesh outward, making the mesh taut. At this time, the cutting quality is the best. After cutting, the guide rod 113 will disengage from the wedge block 112 and will quickly reset under the action of the return spring 115.

[0044] Example 4, based on the above examples, adopts the following preferred method: such as Figure 9As shown, the cutting member 21 includes vertical guide slot two 211 arranged on the clamping portion 40 of the clamping and cutting assembly two 20 and wedge block two 212 arranged on the frame of the conveying portion 30. The vertical guide slot two 211 is internally provided with a guide rod two 213, one end of which is exposed outside the clamping portion 40. The guide rod two 213 is fixedly provided with a connecting rod two 214 vertically slidingly arranged inside the clamping portion 40. The connecting rod two 214 is externally provided with a reset spring two 215, the bottom of which abuts against the inside of the clamping portion 40. The top end of the connecting rod two 214 is exposed outside the clamping portion 40 and located between the two flexible clamping members 41. The top of the connecting rod two 214 is fixedly provided with a cutter 216. Under the action of the conveying member 30, the guide rod two 213 will be in contact with the wedge block two 212 and gradually compress the reset spring two 215 along the vertical guide slot two 211, forcing the cutter 216 to move to one side of the cutting slot 117 to cut the stretched screen. After cutting, the guide rod two 213 will be separated from the wedge block two 212 and will be quickly reset under the action of the reset spring two 215. The cutter 216 can be replaced by an electric heating wire. Since the electric heating wire will be quickly reset under the action of the reset spring two 215, the electric heating wire and the cut electric heating wire will not be in contact again, thereby eliminating the influence on the cutting quality of the cutting slot. Before the cutter 216 moves under the contact of the guide rod two 213 and the wedge block two 212, the pressing rod 116 reaches the maximum stroke after the contact of the guide rod one 113 and the wedge block one 112. The cutter 216 will be reset 0.1-0.5s before the reset of the pressing rod 116. The side wall of the wedge block one 112 and the wedge block two 212 away from the upper screen is offset by 0.1-0.3mm in the vertical direction.

[0045] In the above embodiment, the following preferred mode is adopted: Figure 10 As shown, the conveying portion 30 includes two parallel arranged conveying belts, and the clamping portion 40 includes a connecting plate longitudinally installed on the two conveying belts. The assembly structure of the conveying belts and the connecting plate can ensure the synchronous movement of the clamping and cutting assembly one 10 and the clamping and cutting assembly two 20. The clamping portion 40 is a plate member longitudinally installed on the two conveying belts.

[0046] In the above embodiment, the following preferred mode is adopted:

[0047] S100: one end of the gauze is cut and trimmed according to the design size requirement and is fed into the cutting device, and a pair of rollers are installed at the feeding end of the cutting device, which keeps a certain resistance to the feeding end to ensure that the gauze fed will not change significantly in curling / bending during the feeding process, the gauze is clamped and fed to the cutting station by the two conveying parts 30, the flexible clamping part 41 close to the cutting station side will first clamp the gauze and move away from the cutting station side, the gauze clamped by the flexible clamping part 41 away from the cutting station side of the previous clamping part 40 and the flexible clamping part 41 close to the cutting station side of the current clamping part 40 is tensioned and leveled in line, then the flexible clamping part 41 away from the cutting station side will clamp the gauze again, which is separated from the gauze clamped by the flexible clamping part 41 close to the cutting station side, and the flexible clamping part 41 away from the cutting station side will push the gauze to the front side for supply;

[0048] S200: after the gauze is clamped and fed to the cutting station, the wedge block one 112 and the wedge block two 212 are in position, and both will simultaneously act on the guide rod one 113 to slide vertically along the vertical guide slot one 111 to compress the return spring one 115 through the connecting rod one 114 to push the gauze outward with the pressure rod 116, the guide rod two 213 slides vertically along the vertical guide slot two 211 to compress the return spring two 215 through the connecting rod two 214 to push the gauze outward with the cutter 216, which precisely cuts the gauze at the cutting seam 117, and the gauze at this position is clamped between the flexible clamping part 41 close to the cutting station side and the flexible clamping part 41 away from the cutting station side in the current two position corresponding clamping part 40.

[0049] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. The alternatives can be partial structure, device, method step alternatives, or complete technical solutions. According to the technical solutions and inventive concept of the present application, equivalent replacement or change should be covered within the protection scope of the present application.

Claims

1. A magnetic screen door screen cutting and dispensing apparatus, characterized by, The clamping cutting assembly one (10) and the clamping cutting assembly two (20) include a conveying part (30) and a clamping part (40) installed on the conveying part (30), the clamping part (40) is provided with two flexible clamping members (41) suitable for clamping the yarn web; The clamping cutting assembly one (10) and the clamping cutting assembly two (20) include a conveying part (30) and a clamping part (40) installed on the conveying part (30), the clamping part (40) is provided with two flexible clamping members (41) suitable for clamping the yarn web; The compensation member (11) is suitable for externally stretching the yarn web clamped by the two flexible clamping members (41); The cutting member (21) is suitable for cutting the yarn web externally stretched at the compensation member (11) in line; The two flexible clamping members (41) are symmetrically arranged, the flexible clamping member (41) includes a rotating rod (411) fixedly installed on the clamping part (40), a torsional spring one (412) is installed at the rotating joint of the rotating rod (411) and the clamping part (40), and a clamping body (413) is rotatably installed at the free end of the rotating rod (411); The compensation member (11) includes a vertical guide groove one (111) arranged on the clamping part (40) of the clamping cutting assembly one (10) and a wedge-shaped block one (112) arranged on the frame body of the conveying part (30), a guide rod one (113) is installed inside the vertical guide groove one (111) and one end of the guide rod one (113) is exposed outside the clamping part (40), a connecting rod one (114) is fixedly installed on the guide rod one (113) and vertically slidably inserted into the inside of the clamping part (40), a reset spring one (115) is sleeved outside the connecting rod one (114), the bottom of the reset spring one (115) abuts against the inside of the clamping part (40), the bottom end of the connecting rod one (114) is exposed outside the clamping part (40) and located between the two flexible clamping members (41), a pressing rod (116) is fixedly installed at the bottom of the connecting rod one (114), a cutting slot (117) is installed on the pressing rod (116), and the connecting rod one (114) is an elastic telescopic rod; The cutting member (21) includes a vertical guide groove two (211) arranged on the clamping part (40) of the clamping cutting assembly two (20) and a wedge-shaped block two (212) arranged on the frame body of the conveying part (30), a guide rod two (213) is installed inside the vertical guide groove two (211) and one end of the guide rod two (213) is exposed outside the clamping part (40), a connecting rod two (214) is fixedly installed on the guide rod two (213) and vertically slidably inserted into the inside of the clamping part (40), a reset spring two (215) is sleeved outside the connecting rod two (214), the bottom of the reset spring two (215) abuts against the inside of the clamping part (40), the top end of the connecting rod two (214) is exposed outside the clamping part (40) and located between the two flexible clamping members (41), and a cutter (216) is fixedly installed at the top of the connecting rod two (214). The conveying part (30) comprises two parallelly arranged conveying belts, and the clamping part (40) comprises a connecting plate longitudinally arranged on the two conveying belts.

2. The magnetic screen door screen cutting and dispensing apparatus of claim 1, wherein, The two clamping bodies (413) are clamping rollers, and the two clamping bodies (413) and the corresponding rotating rods (411) are connected through one-way rotating structures (415).

3. The magnetic screen door screen cutting and dispensing apparatus of claim 2, wherein, One of the clamping bodies (413) is a clamping roller, and a torsional spring two (414) is arranged at the rotating node of the other clamping body (413) on the side of the compensation member (11) facing the cutting station, and the elastic coefficient of the torsional spring one (412) is greater than that of the torsional spring two (414).

4. The magnetic screen door screen cutting and dispensing apparatus of claim 3, wherein, The clamping body (413) on which the torsional spring two (414) is arranged is provided with a roller tensioning surface (4131) and a flat clamping surface (4132), the roller tensioning surface (4131) is located on the side close to the compensation member (11) and the cutting member (21), and the flat clamping surface (4132) is located on the side away from the compensation member (11) and the cutting member (21).

5. A method for continuously cutting the screen in line according to the magnetic screen door screen cutting and blanking device of claim 3, characterized in that, The steps of continuously cutting the yarn web in line are as follows: S100: cutting and trimming one end of the yarn web according to the design size requirement and feeding the yarn web, and installing a pair of rollers at the feeding end of the cutting device, the pair of rollers maintains a certain resistance at the feeding end to ensure that the yarn web being fed does not change significantly in curling / bending during the feeding process, the clamping and cutting assembly one (10) and the clamping and cutting assembly two (20) clamp and feed the yarn web to the cutting station through the two conveying parts (30), the flexible clamping member (41) on the side close to the cutting station first clamps the yarn web and moves away from the cutting station, the yarn web clamped by the flexible clamping member (41) on the side away from the cutting station of the previous clamping part (40) and the flexible clamping member (41) on the side close to the cutting station of the current clamping part (40) are tensioned and flattened in line in the reverse direction, then the flexible clamping member (41) on the side away from the cutting station again clamps the yarn web, and the yarn web clamped by the flexible clamping member (41) on the side close to the cutting station is disconnected, and the flexible clamping member (41) on the side away from the cutting station pushes the yarn web to the front side for feeding; S200: after the yarn web is clamped and fed to the cutting station, the wedge block one (112) and the wedge block two (212) are in position correspondence, and they simultaneously act on the guide rod one (113) to vertically slide along the vertical guide groove one (111) to compress the return spring one (115), the guide rod two (213) vertically slides along the vertical guide groove two (211) to compress the return spring two (215), the cutting knife (216) is externally pressed by the pressure rod (116) through the connecting rod two (214), the yarn web at the cutting seam (117) is precisely cut by the pressure rod (116), and the yarn web is clamped between the flexible clamping member (41) on the side close to the cutting station and the flexible clamping member (41) on the side away from the cutting station in the current two position corresponding clamping parts (40).

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