Needle punching and hot melt optional nonwoven web conveying system

Abstract

A kind of needle punching and hot melt alternative non-woven textile fiber web conveying system, including needle punching machine and hot melt machine web input curtain;First laying machine with first web output curtain and second laying with second web output;Web transition conveying curtain drive box is located in the left side of first laying machine, the left end of web transition conveying curtain is connected with web transition conveying curtain drive box, and right end is pivoted in the side of laying machine support support plate, the right end of transition bottom curtain is connected with web transition conveying curtain drive box, and left end corresponds the right end of hot melt machine web input curtain;Web conveying channel switching mechanism, left side corresponds with feeding clamp curtain or the right end of hot melt machine web input curtain, right side corresponds with the left end of first web output curtain, and middle part passes through the lower part of web conveying channel switching mechanism.Satisfy the high efficiency production requirement of high gram weight non-woven product, can respond to single needle punching or hot melt non-woven product production and equipment collection degree is good, reduce the occupation to space.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of non-woven product production equipment, and particularly relates to a needle punching and hot melting selectable non-woven fiber web conveying system. BACKGROUND

[0002] The above-mentioned needle punching refers to a needle punching machine, and more particularly, the non-woven fiber web laid by a previous process such as a web laying machine and conveyed by a conveying mechanism such as a conveying curtain is subjected to needle punching by the needle punching machine to obtain needle punched non-woven fabric or needle punched non-woven felt. The aforementioned needle punching machine can be found in a large number of disclosed Chinese patent documents, such as CN101149286B (automatic multi-functional needle punching machine), CN102808290B (drum needle punching machine), CN106087258B (double-sided counter-punching needle punching machine), CN105734836A (low-noise needle punching machine), CN106087259A (high-speed double-shaft guide out-of-position counter-punching needle punching machine), CN106988023A (small-sized blanket needle punching machine), CN211036324U (needle punching machine for processing carbon fiber products), CN211171122U (carbon fiber flat plate needle punching machine), CN212771285U (carbon fiber needle punching machine), and CN103161033B (needle punching machine for processing carbon fiber products), etc. The above-mentioned hot melting refers to a hot melting machine, and more particularly, the non-woven fiber web laid by a previous process such as a web laying machine and conveyed by a conveying mechanism such as a conveying curtain is subjected to hot melting bonding (compounding) by the hot melting machine to obtain hot melting cotton, which is commonly referred to as glue-free cotton, and is one type of non-woven fabric, which is commonly used as high-grade material for cushioning, warmth, sound absorption, filtration, etc., and has the advantages of good air permeability, warmth, light weight, high tensile strength, resistance to rolling and tearing, and durability. In the disclosed Chinese and foreign patent documents, there are also a large number of disclosures, such as CN100587146C (melt-blown non-woven fabric processing machine), CN100587145C (short fiber conveying mechanism of melt-blown non-woven fabric processing machine), CN109280982A (non-woven fabric hot melting machine), and US patents US5508102, US4931355, US4623576, and U4604313, which also disclose technical information of melt-blown non-woven fabric equipment to some extent.

[0003] It should be noted that the hot melting involved in the aforementioned CN100587146C, CN100587145C, and CN109280982A is mainly for glue-coated cotton, glue-free cotton, and hard cotton, etc., and the previous process of heating or melting bonding and shaping in an oven after web laying by means of heat radiation or hot air penetration is different from the technical elements of hot melting in the above-mentioned needle punching and hot melting.

[0004] The device configuration status so far is that the production of hot melt non-woven fabric and the production of needle punched non-woven fabric are completed by independent devices respectively, and the two cannot be cooperated or selected as required, thus there are the following technical problems: firstly, since non-woven product manufacturers usually do not produce only hot melt non-woven fabric or needle punched non-woven fabric to meet the needs of different customers, they often have two sets of complete equipment, one for producing hot melt non-woven products and the other for producing needle punched non-woven products, and the two sets of equipment are arranged in different areas such as different workshops, which increases the difficulty of equipment protection and the space occupied by the equipment, and also increases the number of personnel, which is not conducive to saving valuable human resources; secondly, since the hot melt production line and the needle punching production line are not related to each other, the non-woven fiber web from the corresponding equipment belonging to the hot melt production line and the non-woven fiber web from the corresponding equipment belonging to the needle punching production line cannot be supplied to the needle punching machine for needle punching or to the hot melt machine for hot melting in a combined state to obtain high weight needle punched non-woven products or hot melt non-woven products with high efficiency; thirdly, it is not possible to avoid the interference problem between the needle punching machine and the hot melting machine.

[0005] The above-mentioned corresponding equipment belonging to the hot melt production line and the needle punching production line mainly refers to the lapper, which is not unfamiliar to the industry because it can be found in Chinese patent documents such as CN2663472Y (lapper mechanism of lapper), CN201517159U (lapper), CN2637519U (lapper), CN100554539C (lapper mechanism with compensation function), CN107043967B (lapper with cotton pressing function) and CN110670244A (high-speed lapper) and CN106868711B (lapper trolley mechanism of lapper), etc.

[0006] In summary, it is of positive significance to explore how to reasonably configure the needle punching machine and the hot melting machine which are originally configured independently to meet the requirement of cooperation between the two when needed and also to meet the requirement of selecting one of the two due to process changes. The technical solution to be introduced below is produced in this background. SUMMARY

[0007] The task of the present application is to provide a needle and thermal bonding selectable nonwoven fiber web conveying system which facilitates the reasonable arrangement of a needle punching machine and a thermal bonding machine which are originally arranged independently of each other, enables the two to cooperate when needed and enables either one of the two to be selected when the process is changed, and which can satisfy the requirement of high efficiency production of high weight nonwoven fabric, can cope with the production of single needle or thermal bonding nonwoven fabric, and can also embody the good degree of equipment collection, reduce the space occupation of equipment, and save valuable labor resources.

[0008] The task of the present application is to provide a needle and thermal bonding selectable nonwoven fiber web conveying system which facilitates the reasonable arrangement of a needle punching machine and a thermal bonding machine which are originally arranged independently of each other, enables the two to cooperate when needed and enables either one of the two to be selected when the process is changed, and which can satisfy the requirement of high efficiency production of high weight nonwoven fabric, can cope with the production of single needle or thermal bonding nonwoven fabric, and can also embody the good degree of equipment collection, reduce the space occupation of equipment, and save valuable labor resources.

[0009] In a specific embodiment of the present application, the web conveying path switching mechanism comprises a right web conveying curtain switching device, a middle web conveying curtain switching device and a left web conveying curtain switching device arranged on the floor of the use site in the use state, the right web conveying curtain switching device is located between the web transition conveying curtain driving box and the middle web conveying curtain switching device, and the right side of the right web conveying curtain switching device is supported on the left side of the first laying machine I at a position corresponding to the left end of the first web output curtain I, the middle web conveying curtain switching device is arranged between the left web conveying curtain switching device and the right web conveying curtain switching device, the left web conveying curtain switching device is arranged between the right side of the hot melt machine web input curtain and the middle web conveying curtain switching device and connected with the middle web conveying curtain switching device; the upper part of the left web conveying curtain switching device in the height direction corresponds to the right side of the needle punching machine; the middle part of the transition bottom curtain passes through the lower part of the right web conveying curtain switching device, the middle web conveying curtain switching device and the left web conveying curtain switching device.

[0010] In another specific embodiment of the present application, a pair of web laying machine wings are extended on the left side of the first web laying machine I; the right web conveying curtain switching device comprises a front web conveying curtain switching wall plate and a rear web conveying curtain switching wall plate supported on the floor of the use site in the use state, the front web conveying curtain switching wall plate and the rear web conveying curtain switching wall plate correspond to each other and are supported and connected by a pair of upper connecting support beams and a pair of lower connecting support beams; a right switching curtain, a front angle changing pulling mechanism, a rear angle changing pulling mechanism, a pulling block lifting linkage shaft and a pulling block lifting linkage shaft driving mechanism, the left end of the right switching curtain is sleeved on the left curtain roller, and the right end of the right switching curtain is sleeved on the right curtain roller and corresponds to the left end of the first web output curtain I, the left curtain roller is located on the left side between the front web conveying curtain switching wall plate and the rear web conveying curtain switching wall plate, a front bearing seat support plate is arranged at a position corresponding to the front side of the right switching curtain, and a rear bearing seat support plate is arranged at a position corresponding to the rear side of the right switching curtain, the front end of the left curtain roller is rotatably supported on the front end bearing seat support plate through the front end bearing seat support plate, the front end bearing seat support plate is fixed to the left end of the front bearing seat support plate, the rear end of the left curtain roller is rotatably supported on the rear end bearing seat support plate through the rear end bearing seat support plate, the rear end bearing seat support plate is fixed to the left end of the rear bearing seat support plate, the front end of the right curtain roller is rotatably supported on the front end bearing seat support plate through the front end bearing seat support plate, the front end bearing seat support plate is fixed to the right end of the front bearing seat support plate, the rear end of the right curtain roller is rotatably supported on the rear end bearing seat support plate through the rear end bearing seat support plate, the rear end bearing seat support plate is fixed to the right end of the rear bearing seat support plate, and the ends of the front end and the rear end of the right curtain roller are rotatably supported in the pair of web laying machine wings of the first web laying machine I.The right switching curtain angle change front traction mechanism comprises a chain connecting lug, a front support boom, a right switching curtain angle change front traction chain, a right switching curtain angle change front traction chain drive sprocket, a right switching curtain angle change front traction chain transition sprocket, a right switching curtain angle change front traction chain block, a front traction chain block sliding guide, a right switching curtain angle change front traction chain limiting guide block, a front traction chain block upper limit signal collector and a front traction chain block lower limit signal collector. The chain connecting lug is fixed on the right switching curtain angle change front traction chain block. The upper end of the front support boom is hinged to the right switching curtain angle change front traction chain block through a front support upper pin shaft. The lower end of the front support boom is hinged to a front support boom lower pin shaft hinge plate through a front support boom lower pin shaft. The front support boom lower pin shaft hinge plate is fixed to the front bearing seat support plate. One end of the right switching curtain angle change front traction chain is connected to the upper part of the right switching curtain angle change front traction chain block through a front traction chain fixed connecting lug. The middle part of the right switching curtain angle change front traction chain is sequentially sleeved on the right switching curtain angle change front traction chain drive sprocket and the right switching curtain angle change front traction chain transition sprocket. The other end of the right switching curtain angle change front traction chain is fixed to the chain connecting lug. The right switching curtain angle change front traction chain drive sprocket is fixed to the front end of the traction chain block lifting linkage shaft. The right switching curtain angle change front traction chain transition sprocket is rotatably arranged on the rear lower part of the web conveying curtain front switching wall plate through a right switching curtain angle change front traction chain transition sprocket shaft. The right switching curtain angle change front traction chain block and the front traction chain block sliding guide constitute a sliding pair. The front traction chain block sliding guide is fixed to the rear side of the web conveying curtain front switching wall plate in a longitudinal state. The right switching curtain angle change front traction chain limiting guide block is spaced and distributed from top to bottom. The right switching curtain angle change front traction chain limiting guide block is fixed to the rear side of the web conveying curtain front switching wall plate. The right side of the right switching curtain angle change front traction chain is in sliding fit with the right switching curtain angle change front traction chain limiting guide block. The front traction chain block sliding guide is located on the left side of the web conveying curtain front switching wall plate cavity. The front traction chain block upper limit signal collector is arranged on the upper part of the front side of the web conveying curtain front switching wall plate and probes into the web conveying curtain front switching wall plate cavity to the left. The front traction chain block lower limit signal collector is arranged on the lower part of the front side of the web conveying curtain front switching wall plate and probes into the web conveying curtain front switching wall plate cavity to the left. The right switching curtain angle change rear traction mechanism comprises an upper connecting lug, a rear support boom, a right switching curtain angle change rear traction chain, a right switching curtain angle change rear traction chain drive sprocket, a right switching curtain angle change rear traction chain transition sprocket, a right switching curtain angle change rear traction chain block, a rear traction chain block sliding guide and a right switching curtain angle change rear traction chain limiting guide block. The upper connecting lug is fixed on the right switching curtain angle change rear traction chain block.The upper end of the rear support hanger is hinged to the right switch curtain angle change rear traction slider through a rear support upper pin shaft and a right switch curtain angle change rear traction slider hinge, and the lower end of the rear support hanger is hinged to a rear support hanger lower pin shaft hinge plate fixed to the left end of the rear side of the rear bearing seat support plate. One end of the right switch curtain angle change rear traction chain is connected to the upper connecting lug, and the middle part of the right switch curtain angle change rear traction chain is sequentially sleeved on the right switch curtain angle change rear traction chain drive sprocket and the right switch curtain angle change rear traction chain transition sprocket. The other end of the right switch curtain angle change rear traction chain is fixed to the lower connecting lug fixed to the lower part of the right switch curtain angle change rear traction slider. The right switch curtain angle change rear traction chain drive sprocket is a double-row sprocket structure and is fixed to the rear end of the traction slider lifting linkage shaft. The right switch curtain angle change rear traction chain transition sprocket is rotatably arranged on the front side of the lower part of the web conveying curtain rear switching wall plate through a right switch curtain angle change rear traction chain transition sprocket shaft. The right switch curtain angle change rear traction slider and the rear traction slider sliding guide rail form a sliding pair, and the rear traction slider sliding guide rail is fixed to the front side of the web conveying curtain rear switching wall plate in a longitudinal state. The number of right switch curtain angle change rear traction chain limiting guide blocks is one set spaced from top to bottom and fixed to the front side of the web conveying curtain rear switching wall plate at a position on the right side of the web conveying curtain rear switching wall plate cavity opened in the web conveying curtain rear switching wall plate. The right side of the right switch curtain angle change rear traction chain is in sliding cooperation with the set of right switch curtain angle change rear traction chain limiting guide blocks. The rear traction slider sliding guide rail is located on the left side of the web conveying curtain rear switching wall plate cavity. The front end of the traction slider lifting linkage shaft is rotatably supported on the top of the web conveying curtain front switching wall plate through a traction slider lifting linkage shaft front bearing seat, and the rear end is rotatably supported on the top of the web conveying curtain rear switching wall plate through a traction slider lifting linkage shaft rear bearing seat. The traction slider lifting linkage shaft drive mechanism includes a traction slider lifting linkage shaft drive motor and a traction slider lifting linkage shaft drive reduction box. The traction slider lifting linkage shaft drive motor is in transmission cooperation with the traction slider lifting linkage shaft drive reduction box, and the traction slider lifting linkage shaft drive reduction box is fixed to the top of the web conveying curtain rear switching wall plate together with the traction slider lifting linkage shaft drive motor. A reduction box final stage power output shaft sprocket is fixed to the reduction box final stage power output shaft of the traction slider lifting linkage shaft drive reduction box. The reduction box final stage power output shaft sprocket is in transmission connection with the right switch curtain angle change rear traction chain drive sprocket of the double-row sprocket structure through a transmission chain. The middle part of the transition bottom curtain passes through the lower part between the web conveying curtain front switching wall plate and the web conveying curtain rear switching wall plate and the lower part of the web conveying curtain intermediate switching device. The left end of the transition bottom curtain extends to the left side of the web conveying curtain left switching device after passing through the lower part of the web conveying curtain left switching device and corresponds to the right end of the hot melt machine web input curtain.

[0011] In still another specific embodiment of the present application, the front traction slider up-limit position signal collector and the front traction slider down-limit position signal collector are travel switches, micro switches, position proximity switches, reed switches or Hall effect elements; and the traction slider lifting linkage shaft drive motor is a motor with forward and reverse rotation functions.

[0012] In still another specific embodiment of the present application, the structure of the middle webbing conveying curtain switching device arranged between the left webbing conveying curtain switching device and the right webbing conveying curtain switching device is the same as that of the right webbing conveying curtain switching device, the left end of the middle webbing switching conveying curtain of the middle webbing conveying curtain switching device extends to and is connected with the left webbing conveying curtain switching device, and the right end of the middle webbing switching conveying curtain corresponds to the left end of the right webbing conveying curtain; the feeding curtain comprises an upper batt clamping curtain and a lower batt clamping curtain, the left ends of the upper batt clamping curtain and the lower batt clamping curtain extend into the needle loom, and the left ends of the upper batt clamping curtain and the lower batt clamping curtain are respectively sleeved on the upper batt clamping curtain left roller shaft and the lower batt clamping curtain left roller shaft, and the right ends of the upper batt clamping curtain and the lower batt clamping curtain are respectively sleeved on the upper batt clamping curtain right roller shaft and the lower batt clamping curtain right roller shaft, the upper batt clamping curtain left roller shaft and the lower batt clamping curtain left roller shaft are rotatably supported on the needle loom, and the upper batt clamping curtain right roller shaft and the lower batt clamping curtain right roller shaft are respectively supported in a cantilevered state by an upper batt clamping curtain roller shaft bearing seat support plate corresponding to the front side and the rear side of the upper batt clamping curtain and located between the upper batt clamping curtain left and right roller shafts and a lower batt clamping curtain roller shaft bearing seat support plate corresponding to the front side and the rear side of the lower batt clamping curtain and located between the lower batt clamping curtain left and right roller shafts.

[0013] In still another specific embodiment of the present application, the left switching device of the web conveying curtain comprises a front wall plate, a rear wall plate, a front lifting slider, a rear lifting slider, a front lifting slider guide rail, a rear lifting slider guide rail, a front lifting slider traction belt, a rear lifting slider traction belt, a front lifting slider traction belt driving wheel, a front lifting slider traction belt redirection transition wheel, a rear lifting slider traction belt driving wheel, a rear lifting slider traction belt redirection transition wheel, a traction belt driving wheel linkage shaft, a linkage shaft power driving mechanism, a set of front lifting slider traction belt limiting guide blocks and a set of rear lifting slider traction belt limiting guide blocks, the front wall plate and the rear wall plate are supported on the floor of the use site in the use state, the front wall plate and the rear wall plate correspond to each other in front and back and a pair of wall plate upper support connecting plates are fixed between the upper parts of the front and rear wall plates on the facing side, and a pair of wall plate lower support connecting plates are fixed between the lower parts of the front and rear wall plates on the facing side, a front wall plate accommodation cavity is longitudinally formed in the middle of the length direction of the front wall plate, and a rear wall plate accommodation cavity is longitudinally formed in the middle of the length direction of the rear wall plate, the front lifting slider is slidingly arranged on the side of the front wall plate facing the rear wall plate at the position corresponding to the front wall plate accommodation cavity and forms a sliding pair with the front lifting slider guide rail which is fixed on the rear side of the front wall plate in a longitudinal state, the rear lifting slider is slidingly arranged on the side of the rear wall plate facing the front wall plate at the position corresponding to the rear wall plate accommodation cavity and forms a sliding pair with the rear lifting slider guide rail which is fixed on the front side of the rear wall plate in a longitudinal state, one end of the front lifting slider traction belt is fixed to the upper part of the front lifting slider through an upper belt fixing lug, the middle part of the front lifting slider traction belt is sequentially sleeved on the front lifting slider traction belt driving wheel and the front lifting slider traction belt redirection transition wheel, and the other end of the front lifting slider traction belt is fixed to the lower part of the front lifting slider through a lower belt fixing lug, one end of the rear lifting slider traction belt is fixed to the upper end of the rear lifting slider through an upper belt fixing foot, the middle part of the rear lifting slider traction belt is sequentially sleeved on the rear lifting slider traction belt driving wheel and the rear lifting slider traction belt redirection transition wheel, and the other end of the rear lifting slider traction belt is fixed to the lower part of the rear lifting slider through a lower belt fixing foot, the front lifting slider traction belt driving wheel is fixed to the front end of the traction belt driving wheel linkage shaft, the front lifting slider traction belt redirection transition wheel is rotatably arranged on the front lifting slider traction belt redirection transition wheel shaft through a bearing, the front lifting slider traction belt redirection transition wheel shaft is fixed to the rear lower part of the front wall plate, the rear lifting slider traction belt driving wheel is fixed to the rear end of the traction belt driving wheel linkage shaft, the rear lifting slider traction belt redirection transition wheel is rotatably arranged on the rear lifting slider traction belt redirection transition wheel shaft through a bearing, and the rear lifting slider traction belt redirection transition wheel shaft is fixed to the front lower part of the rear wall plate and corresponds to the front lifting slider traction belt redirection transition wheel shaft.The front end of the traction belt driving wheel linkage shaft is rotatably supported on a linkage shaft front bearing seat arranged on the top of the front wall plate, and the rear end of the traction belt driving wheel linkage shaft is rotatably supported on a linkage shaft rear bearing seat arranged on the top of the rear wall plate, the linkage shaft power driving mechanism is arranged on the top of the rear wall plate and is in transmission connection with the rear end of the traction belt driving wheel linkage shaft, a group of front lifting slide block traction belt limiting guide blocks are fixed on the side of the front wall plate facing the rear wall plate in a top-down interval state and are located on the left side of the front wall plate accommodation cavity, the left side of the front lifting slide block traction belt is in sliding fit with the group of front lifting slide block traction belt limiting guide blocks, a group of rear lifting slide block traction belt limiting guide blocks are fixed on the side of the rear wall plate facing the front wall plate in a top-down interval state and are located on the left side of the rear wall plate accommodation cavity, and the left side of the rear lifting slide block traction belt is in sliding fit with the group of rear lifting slide block traction belt limiting guide blocks; the left end of the middle switching conveying curtain of the cotton web extends between the front wall plate and the rear wall plate and then extends to the right side between the front wall plate and the rear wall plate, the front side of the left end of the middle switching conveying curtain of the cotton web is connected with the front lifting slide block at the position corresponding to the front lifting slide block, and the rear side of the left end of the middle switching conveying curtain of the cotton web is connected with the rear lifting slide block at the position corresponding to the rear lifting slide block; the left end of the transition bottom curtain passes through the lower part between the front wall plate and the rear wall plate and then extends to the left side between the front wall plate and the rear wall plate corresponding to the right end of the hot melting machine cotton web input curtain.

[0014] In a further specific embodiment of the present application, the linkage shaft power driving mechanism comprises a linkage shaft power driving motor, a linkage shaft power driving reduction box, a linkage shaft power driving chain and a linkage shaft driving sprocket, the linkage shaft power driving motor is in transmission fit with the linkage shaft power driving reduction box, and the linkage shaft power driving reduction box is arranged on the top of the rear wall plate together with the linkage shaft power driving motor, a linkage shaft power driving reduction box last stage power output shaft sprocket is fixed on the linkage shaft power driving reduction box last stage power output shaft of the linkage shaft power driving reduction box, one end of the linkage shaft power driving chain is sleeved on the linkage shaft power driving reduction box last stage power output shaft sprocket, the other end is sleeved on the linkage shaft driving sprocket, and the linkage shaft driving sprocket is fixed on the rear end of the traction belt driving wheel linkage shaft at the position corresponding to the rear side of the rear lifting slide block traction belt driving wheel.

[0015] In a further specific embodiment of the present application, the linkage shaft power drive motor is a motor with forward and reverse rotation function, a front lifting slider upper limit position signal collector is arranged on the upper front side of the front wall plate, and a front lifting slider lower limit position signal collector corresponding to the front lifting slider upper limit position signal collector is arranged on the lower front side of the front wall plate, the front lifting slider upper limit position signal collector and the front lifting slider lower limit position signal collector are extended to the right and correspond to the front wall plate displacement cavity.

[0016] In a further specific embodiment of the present application, the front side of the middle switching conveying curtain in the web is provided with a middle switching conveying curtain roller shaft bearing seat front supporting plate, and the rear side of the middle switching conveying curtain in the web is provided with a middle switching conveying curtain roller shaft bearing seat rear supporting plate, the left end of the middle switching conveying curtain in the web is sleeved on the middle switching conveying curtain left roller shaft, and the right end of the middle switching conveying curtain in the web is sleeved on the middle switching conveying curtain right roller shaft, the front end of the middle switching conveying curtain left roller shaft is rotatably supported on the left end of the middle switching conveying curtain roller shaft bearing seat front supporting plate through a front bearing seat, the rear end of the middle switching conveying curtain left roller shaft is rotatably supported on the left end of the middle switching conveying curtain roller shaft bearing seat rear supporting plate through a rear bearing seat, the front end of the middle switching conveying curtain right roller shaft is rotatably supported on the right end of the middle switching conveying curtain roller shaft bearing seat front supporting plate through a roller shaft bearing seat, and the rear end of the middle switching conveying curtain right roller shaft is rotatably supported on the right end of the middle switching conveying curtain roller shaft bearing seat rear supporting plate through a roller shaft bearing seat; a front supporting plate shaft head corresponding to the front lifting slider is fixed on the front side of the middle switching conveying curtain roller shaft bearing seat front supporting plate and pivotally connected with a front supporting plate shaft head supporting bearing seat, and the front supporting plate shaft head supporting bearing seat is fixed on the front side of the front lifting slider; a rear supporting plate shaft head corresponding to the rear lifting slider is fixed on the rear side of the middle switching conveying curtain roller shaft bearing seat rear supporting plate and pivotally connected with a rear supporting plate shaft head supporting bearing, and the rear supporting plate shaft head supporting bearing seat is fixed on the rear side of the rear lifting slider.

[0017] In a further specific embodiment of the present application, the front lifting slider upper limit position signal collector and the front lifting slider lower limit position signal collector are travel switches, micro switches, position proximity switches, reed switches or Hall effect elements.

[0018] The technical scheme provided by the application has the advantages that the needle punching machine and the hot melting machine web input curtain for inputting the web to the left of the hot melting machine are combined, the first laying machine I and the second laying machine II are combined, the web conveying channel switching mechanism and the transition bottom curtain are arranged between the right end of the hot melting machine web input curtain and the web transition conveying curtain driving box on the left side of the first laying machine I, and therefore the needle punching machine and the hot melting machine web input curtain which are originally independently arranged are reasonably arranged, the two can be used in cooperation when needed, and one of the two can be selected when the process changes, the high-efficiency production requirement for high-weight non-woven fabric products can be met, the production of single needle punching or hot melting non-woven fabric products can be met, the good degree of equipment collection can be embodied, the space occupied by the equipment can be reduced, and the valuable labor resources can be saved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is an embodiment schematic diagram of the application.

[0020] Figure 2 It is an embodiment schematic diagram of the application. Figure 1 It is a detailed structural diagram of the right switching device of the web conveying curtain of the structural system of the web conveying channel switching mechanism.

[0021] Figure 3 It is a detailed structural diagram of the middle switching device of the web conveying curtain of the structural system of the web conveying channel switching mechanism. Figure 1 It is a detailed structural diagram of the left switching device of the web conveying curtain of the structural system of the web conveying channel switching mechanism.

[0022] Figure 4 It is a detailed structural diagram of the left switching device of the web conveying curtain of the structural system of the web conveying channel switching mechanism. Figure 1 It is a detailed structural diagram of the left switching device of the web conveying curtain of the structural system of the web conveying channel switching mechanism.

[0023] Figure 5 It is a first application example schematic diagram of the application.

[0024] Figure 6 It is a second application example schematic diagram of the application.

[0025] Figure 7 It is a third application example schematic diagram of the application.

[0026] Figure 8 It is a fourth application example schematic diagram of the application. DETAILED DESCRIPTION

[0027] In order to more clearly understand the technical essence and beneficial effects of the application, the applicant will make a detailed description in the form of examples below, but the description of the examples is not a limitation on the application scheme, and any equivalent transformation only in form but not in substance according to the application concept should be regarded as the technical scheme scope of the application.

[0028] In the following description, the directional or positional concepts of upper, lower, left, right, front and rear are based on the position state of the device, and thus should not be understood as a specific limitation of the technical solutions provided by the present application. Figure 1

[0029] Please refer to Figure 1 ​, show a needle loom 1 provided on a needle loom base 12 and equipped with a feeding clamp 11 and a thermal fusion machine web input curtain 2 for conveying the web to the left to a thermal fusion machine, the thermal fusion machine web input curtain 2 passing in front of (i.e. the front side) the needle loom base 12 of the needle loom 1 to extend to the left to the thermal fusion machine, since the needle loom 1 and the thermal fusion machine are commonly known and used devices and in this embodiment it is not necessary to particularly limit their specific structure, the applicant will not expand on them; show a first laying machine 1 with a first web output curtain 1 31 and a second laying machine 2 with a second web output curtain 2 41, the second laying machine 2 being located to the right of the first laying machine 1 and the first laying machine 1 being provided on a laying machine support 32, on which a laying machine support bracket 321 is provided, the right end of the laying machine support bracket 321 extending to the right of the laying machine support 32 in a horizontal cantilever state, between the second laying machine 2 and the right end of the laying machine support bracket 321 towards the upper side a transition curtain 42 is provided for receiving the non-woven fiber web output by the second web output curtain 2 41 from the second laying machine 2 towards the laying machine support bracket 321, since the first laying machine 1 is equipped with a laying machine support 32, the position of the first laying machine 1 is higher than that of the second laying machine 2, so as not to interfere with the cotton supply; show a web transition conveying curtain drive box 10, a web transition conveying curtain 20 and a transition bottom curtain 30, the web transition conveying curtain drive box 10 being located to the left of the aforementioned first laying machine 1, which in use is provided on a support, the left end of the web transition conveying curtain 20 is drivingly connected to the web transition conveying curtain drive box 10 through a web transition conveying curtain left curtain roller 201, while the right end is pivotally arranged on the lower side of the aforementioned laying machine support bracket 321 through a web transition conveying curtain reversing roller 202, the right end of the transition bottom curtain 30 is drivingly connected to the web transition conveying curtain drive box 10 through a web transition conveying curtain right curtain roller 301, while the left end corresponds to the right end of the aforementioned thermal fusion machine web input curtain 2; show a web conveying passage switching mechanism 5, which is provided on the floor of the use site at a position corresponding to the right end of the aforementioned thermal fusion machine web input curtain 2 and the aforementioned web transition conveying curtain drive box 10, and the left side of the web conveying passage switching mechanism 5 corresponds to the aforementioned feeding clamp 11 or the right end of the aforementioned thermal fusion machine web input curtain 2, while the right side of the web conveying passage switching mechanism 5 corresponds to the left end of the aforementioned first web output curtain 1 31, the middle part of the aforementioned transition bottom curtain 30 passes through the lower part of the web conveying passage switching mechanism 5.

[0030] The aforementioned web conveying path switching mechanism 5 includes a right web conveying curtain switching device 51, a middle web conveying curtain switching device 52 and a left web conveying curtain switching device 53 which are arranged on the floor of the use site in the use state, the right web conveying curtain switching device 51 is located between the aforementioned web transition conveying curtain driving box 10 and the middle web conveying curtain switching device 52, and the right side of the right web conveying curtain switching device 51 is supported on the left side of the aforementioned first web laying machine 13 at a position corresponding to the left end of the aforementioned first web output curtain 131, the middle web conveying curtain switching device 52 is arranged between the left web conveying curtain switching device 53 and the right web conveying curtain switching device 51, and the left web conveying curtain switching device 53 is arranged between the right side of the aforementioned hot melt machine web input curtain 2 and the middle web conveying curtain switching device 52 and connected with the middle web conveying curtain switching device 52; the upper part of the aforementioned left web conveying curtain switching device 53 in the height direction corresponds to the right side of the aforementioned needle punching machine 1; the middle part of the aforementioned transition bottom curtain 30 passes through the lower part of the right web conveying curtain switching device 51, the middle web conveying curtain switching device 52 and the left web conveying curtain switching device 53.

[0031] See Figure 2, A pair of web-laying machine wings 33 extend from the left side of the first web-laying machine I3. The web-conveying curtain switching device 51 includes a front web-conveying curtain switching wall 511 and a rear web-conveying curtain switching wall 512 supported on the floor of the use site in the use state. The front and rear web-conveying curtain switching walls 511 and 512 are arranged in front of and behind each other and are supported by a pair of upper wall-connection support beams 513a and a pair of lower wall-connection support beams 513b. A right web-conveying curtain 514, a front right web-conveying curtain angle-changing pulling mechanism 515, a rear right web-conveying curtain angle-changing pulling mechanism 516, a pulling-block lifting linkage shaft 517, and a pulling-block lifting linkage shaft driving mechanism 518 are provided. The left end of the right web-conveying curtain 514 is sleeved on a right web-conveying curtain left curtain roller 5141, and the right end of the right web-conveying curtain 514 is sleeved on a right web-conveying curtain right curtain roller 5142 and corresponds to the left end of the first web output curtain I3. The right web-conveying curtain left curtain roller 5141 is located on the left side between the front and rear web-conveying curtain switching walls 511 and 512. A front bearing seat support plate 5143 is arranged at a position corresponding to the front side of the right web-conveying curtain 514, and a rear bearing seat support plate 5144 is arranged at a position corresponding to the rear side of the right web-conveying curtain 514. The right web-conveying curtain left curtain roller front shaft head 51411 of the right web-conveying curtain left curtain roller 5141 is rotatably supported on the right web-conveying curtain left curtain roller front shaft head support bearing seat fixed plate 51413 through the right web-conveying curtain left curtain roller front shaft head support bearing seat 51412. The right web-conveying curtain left curtain roller front shaft head support bearing seat fixed plate 51413 is fixed to the left end front side of the front bearing seat support plate 5143. The right web-conveying curtain right curtain roller front shaft head 51421 of the right web-conveying curtain right curtain roller 5142 is rotatably supported on the right web-conveying curtain right curtain roller front shaft head support bearing seat fixed plate 51423 through the right web-conveying curtain right curtain roller front shaft head support bearing seat 51422. The right web-conveying curtain right curtain roller front shaft head support bearing seat fixed plate 51423 is fixed to the right end front side of the front bearing seat support plate 5143. The right web-conveying curtain left curtain roller rear shaft head (not shown in the figure) of the right web-conveying curtain left curtain roller 5141 is rotatably supported on the right web-conveying curtain left curtain roller rear shaft head support bearing seat fixed plate (not shown in the figure) through the right web-conveying curtain left curtain roller rear shaft head support bearing seat. The right web-conveying curtain left curtain roller rear shaft head support bearing seat fixed plate is fixed to the left end rear side of the rear bearing seat support plate 5144.The web conveying right switch curtain right curtain roller rear axle head (not shown in the figure) of the web conveying right switch curtain right curtain roller is rotatably supported on the web conveying right switch curtain right curtain roller rear axle head support bearing seat fixing plate (not shown in the figure) by the web conveying right switch curtain right curtain roller rear axle head (not shown in the figure) support bearing seat fixing plate, which is fixed to the right end rear side of the aforementioned rear bearing seat support plate 5144. The aforementioned web conveying right switch curtain right curtain roller front axle head 51421 and the end of the web conveying right switch curtain right curtain roller rear axle head are rotatably supported between a pair of web laying machine wing plates 33 (also referred to as "wall plate extension plates or machine frame extension plates") of the aforementioned first web laying machine I3. The right switch curtain angle change front traction mechanism 515 includes a chain connecting lug 5151, a front support hanger 5152, a right switch curtain angle change front traction chain 5153, a right switch curtain angle change front traction chain drive sprocket 5154, a right switch curtain angle change front traction chain transition sprocket 5155, a right switch curtain angle change front traction slider 5156, a front traction slider sliding guide 5157, a right switch curtain angle change front traction chain limiting guide block 5158a, a front traction slider upward limiting signal collector 5158b, and a front traction slider downward limiting signal collector 5158c. The chain connecting lug 5151 is fixed to the aforementioned right switch curtain angle change front traction slider 5156. The upper end of the front support hanger 5152 is hinged to the right switch curtain angle change front traction slider 5156 through a front support upper pin shaft. The lower end of the front support hanger 5152 is hinged to a front support hanger lower pin shaft hinge plate 51522 through a front support hanger lower pin shaft 51521. The front support hanger lower pin shaft hinge plate 51522 is fixed to the left side of the aforementioned front bearing seat support plate 5143. One end of the right switch curtain angle change front traction chain 5153 is connected to the upper part of the right switch curtain angle change front traction slider 5156 through a front traction chain fixed connecting lug 51531 fixed to the upper part of the right switch curtain angle change front traction slider 5156. The middle part of the right switch curtain angle change front traction chain 5153 is sequentially sleeved on the right switch curtain angle change front traction chain drive sprocket 5154 and the right switch curtain angle change front traction chain transition sprocket 5155. The other end of the right switch curtain angle change front traction chain 5153 is fixed to the aforementioned chain connecting lug 5151. The right switch curtain angle change front traction chain drive sprocket 5154 is fixed to the front end of the aforementioned traction slider lifting linkage shaft 517. The right switch curtain angle change front traction chain transition sprocket 5155 is rotatably arranged on the lower rear side of the aforementioned web conveying curtain front switch wall plate 511 through a right switch curtain angle change front traction chain transition sprocket shaft 51551. The right switch curtain angle change front traction slider 5156 and the front traction slider sliding guide 5157 form a sliding pair. The front traction slider sliding guide 5157 is fixed to the rear side of the web conveying curtain front switch wall plate 511 in a longitudinal state.The number of the right switch curtain angle change before traction chain limiting guide block 5158a is spaced from top to bottom and fixed on the right side of the cotton web conveying curtain front switching wall plate cavity 5111 and the back side of the cotton web conveying curtain front switching wall plate 511. The right side of the right switch curtain angle change before traction chain 5153 is in sliding cooperation with the group of right switch curtain angle change before traction chain limiting guide block 5158a. The front traction sliding block sliding guide rail 5157 is located on the left side of the cotton web conveying curtain front switching wall plate cavity 5111. The front traction sliding block upper limit signal collector 5158b is arranged on the front upper side of the cotton web conveying curtain front switching wall plate 511 and probes into the cotton web conveying curtain front switching wall plate cavity 5111 to the left. The front traction sliding block lower limit signal collector 5158c is arranged on the front lower side of the cotton web conveying curtain front switching wall plate 511 and probes into the cotton web conveying curtain front switching wall plate cavity 5111 to the left.

[0032] Continued to see Figure 2, the right switch curtain angle change after the traction mechanism 516 includes the upper connection lug 5161, the rear support boom 5162, the right switch curtain angle change after the traction chain 5163, the right switch curtain angle change after the traction chain drive sprocket 5164, the right switch curtain angle change after the traction chain transition sprocket 5165, the right switch curtain angle change after the traction block 5166, the rear traction block sliding guide rail 5167 and the right switch curtain angle change after the traction chain limiting guide block 5168, the upper connection lug 5161 is fixed on the aforementioned right switch curtain angle change after the traction block 5166, the upper end of the rear support boom 5162 is hinged with the right switch curtain angle change after the traction block 5166 through the rear support upper pin shaft 51621, and the lower end of the rear support boom 5162 is hinged with the rear support boom lower pin shaft hinge plate (not shown in the figure) through the rear support boom lower pin shaft (not shown in the figure), which is fixed with the rear side left end of the aforementioned rear bearing seat support plate 5144, one end of the right switch curtain angle change after the traction chain 563 is fixedly connected with the upper connection lug 5161, the middle part of the right switch curtain angle change after the traction chain 5153 is sequentially sleeved on the right switch curtain angle change after the traction chain drive sprocket 5164 and the right switch curtain angle change after the traction chain transition sprocket 5165, and the other end of the right switch curtain angle change after the traction chain 5163 is fixed with the lower connection lug 5169 fixed on the lower part of the right switch curtain angle change after the traction block 5166, the right switch curtain angle change after the traction chain drive sprocket 5164 is a double-row sprocket structure and is fixed on the rear end of the aforementioned traction block lifting linkage shaft 517, the right switch curtain angle change after the traction chain transition sprocket 5165 is rotationally arranged on the front side lower part of the aforementioned cotton web conveying curtain rear switching wall plate 512 through the right switch curtain angle change after the traction chain transition sprocket shaft 51651, the right switch curtain angle change after the traction block 5166 and the rear traction block sliding guide rail 5167 constitute a sliding pair, and the rear traction block sliding guide rail 5167 is fixed to the front side of the cotton web conveying curtain rear switching wall plate 512 in a longitudinal state, the right switch curtain angle change after the traction chain limiting guide block 5168 is one set of blocks spaced from top to bottom in number and is fixed to the front side of the cotton web conveying curtain rear switching wall plate 512 at a position located on the right side of the cotton web conveying curtain rear switching wall plate cavity 5121 opened in the cotton web conveying curtain rear switching wall plate 512, the right side of the aforementioned right switch curtain angle change after the traction chain 5163 is in sliding fit with the set of right switch curtain angle change after the traction chain limiting guide block 5168, the aforementioned rear traction block sliding guide rail 5167 is located on the left side of the aforementioned cotton web conveying curtain rear switching wall plate cavity 5121, the front end of the traction block lifting linkage shaft 517 is rotationally supported on the top of the cotton web conveying curtain front switching wall plate 511 through the traction block lifting linkage shaft front bearing seat 5171, and the rear end is rotationally supported on the top of the cotton web conveying curtain rear switching wall plate 512 through the traction block lifting linkage shaft rear bearing seat 5172,The traction slider lifting linkage shaft drive mechanism 518 includes a traction slider lifting linkage shaft drive motor 5181 and a traction slider lifting linkage shaft drive reduction box 5182. The traction slider lifting linkage shaft drive motor 5181 is in transmission cooperation with the traction slider lifting linkage shaft drive reduction box 5182 and the traction slider lifting linkage shaft drive reduction box 5182 is fixed to the top of the switching wall panel 512 after the cotton mesh conveying curtain together with the traction slider lifting linkage shaft drive motor 5181. A reduction box final power output shaft chain is fixed on the reduction box final power output shaft of the traction slider lifting linkage shaft drive reduction box 5182. The final power output shaft sprocket of the reduction gearbox is connected to the double-row sprocket structure via a transmission chain and the rear traction chain drive sprocket 5164 of the right switching curtain angle change. The middle portion of the transition bottom curtain 30 passes through the lower portion between the front switching wall panel 511 and the rear switching wall panel 512 of the cotton web conveying curtain, as well as the lower portion of the cotton web conveying curtain intermediate switching device 52. After passing through the lower portion of the cotton web conveying curtain left switching device 53, the left end of the transition bottom curtain 30 extends to the left side of the cotton web conveying curtain left switching device 53 and corresponds to the right end of the cotton web input curtain 2 of the hot melt machine.

[0033] In this embodiment, the aforementioned front traction slider upward limit signal collector 5158b and the front traction slider downward limit signal collector 5158c are travel switches, but micro switches, position proximity switches or reed switches can also be used, and even Hall sensing elements can be used; the aforementioned traction slider lifting linkage shaft drive motor 5181 is a motor with forward and reverse rotation functions.

[0034] Assumptions Figure 2 The cotton web conveying right switching curtain 514 is shown in Figure 1 、 Figure 2 、 Figure 5 as well as Figure 7 is in a substantially horizontal state. In this state, the cotton web laid by the first web laying machine Ⅰ3 is delivered from the left end of the cotton web conveying right switching curtain 514 to the cotton web intermediate switching conveying curtain 521 of the cotton web conveying curtain intermediate switching device 52 to be described below. Figure 1 、 Figure 2 、 Figure 5 as well as Figure 7 The horizontal state shown in the figure, the cotton mesh laid out from the first web laying machine Ⅰ3, that is, the upper cotton mesh layer 6, passes through the first cotton mesh output curtain Ⅰ31, the cotton mesh conveying right switching curtain 514 and the cotton mesh middle switching conveying curtain 521 in turn, and then is conveyed by the cotton mesh middle switching conveying curtain 521 to between the upper and lower cotton clamping curtains 111 and 112 of the feeding clamping curtain 11 mentioned below, until it enters the needle punching area of ​​the needle punching machine 1 for needle punching.

[0035] In the above state, the present invention is Figure 1 and Figure 5 Indicated and by Figure 2 The working process of the right switching device 51 of the cotton mesh conveying curtain disclosed in detail is: the traction slider lifting linkage shaft driving motor 5181 of the structural system of the traction slider lifting linkage shaft driving mechanism 518 works, which drives the traction slider lifting linkage shaft to drive the reduction box 5182, and the reduction box final power output shaft of the reduction box 5182 driven by the traction slider lifting linkage shaft drives the reduction box final power output shaft sprocket fixed thereon, and the reduction box final power output shaft sprocket transmission chain drives the aforementioned right switching curtain angle change traction chain driving sprocket 5164 in the double-row sprocket structure, and the traction chain driving sprocket 5164 after the right switching curtain angle changes drives the traction slider lifting linkage shaft 517 to rotate, and the rotation of the traction slider lifting linkage shaft 517 simultaneously drives the traction chain driving sprocket 5164 before the right switching curtain angle changes. The movable sprocket 5154 and the rear traction chain driving sprocket 5164 of the right switching curtain angle change drive the sprocket 5154 of the front traction chain driving sprocket 5153 of the right switching curtain angle change, and at the same time, the rear traction chain driving sprocket 5164 of the right switching curtain angle change drives the rear traction chain 5163 of the right switching curtain angle change, so that the front traction slider 5156 of the right switching curtain angle change moves upward (slides) along the front traction slider sliding guide rail, and at the same time, the rear traction slider 5166 of the right switching curtain angle change moves upward (slides) along the rear traction slider sliding guide rail, and the synchronous upward displacement of the front and rear supporting booms 5152 and 5162 respectively causes the left end of the cotton web conveying right switching curtain 514 to move upward through the front and rear bearing seat support plates 5143 and 5144 until it becomes the aforementioned position. Figure 1 、 Figure 2 、 Figure 5 as well as Figure 7 The horizontal state is shown. During the aforementioned process, the upper limit of the upward displacement of the rear traction sliders 5156 and 5166 before and after the right switching curtain angle changes is determined by the moment when the front traction slider 5156 contacts the front traction slider upward limit signal collector 5158b. Specifically, when the front traction slider 5156 contacts the front traction slider upward limit signal collector 5158b before the right switching curtain angle changes, the front traction slider upward limit signal collector 5158b sends a signal to the electrical controller, which in turn sends a signal to the aforementioned traction slider lifting linkage shaft drive motor 5181 to stop operation.

[0036] When the aforementioned traction slider lifting linkage shaft driving motor 5181 is reversed relative to the aforementioned rotation direction, then according to the reverse description of the aforementioned action process, the front and rear traction sliders 5156 and 5166 move downward due to the change in the angle of the right switching curtain, causing the left end of the cotton web conveying right switching curtain 514 to tilt downward and present a Figure 6 as well asFigure 8 is in a right-to-left tilting state, in which the upper web layer 6 out of the first laying machine 3 changes the conveying trajectory (relative to Figure 1 , Figure 2 , Figure 5 and Figure 7 ) and is laid on the lower web layer 7 laid by the second laying machine II 4, merges with the lower web layer 7 to enter the hot melt machine web input curtain 2, and is conveyed by the hot melt machine web input curtain 2 to the hot melt machine located at the left end but not shown in the figure for hot melt compounding. As can be seen, in the state shown in Figure 6 and Figure 8 , the upper web layer 6 does not reach the aforementioned web intermediate switching conveying curtain 521, but bypasses the web intermediate switching conveying curtain 521 and is laid above the lower web layer 7. The limit position of the downward displacement of the traction sliding blocks 5156, 5166 before and after the change of the angle of the right switching curtain is determined by the contact or collision of the traction sliding block 5156 before the change of the angle of the right switching curtain with the aforementioned front traction sliding block downward limit position signal collector 5158c, which is the same as the aforementioned.

[0037] As can be seen from the above description of the working principle of the web conveying curtain right switching device 51, it guarantees two conveying modes of the upper web layer 6 out of the first laying machine I 3, one is that the upper web layer 6 enters the needle punching machine 1, and the other is that the upper web layer 6 enters the hot melt machine web input curtain 2 in the merging state with the lower web layer 7 (as Figure 6 , Figure 8 ).

[0038] Please refer to Figure 3 and in combination with Figure 1 , Figure 2 and Figure 4 , the structure of the aforementioned web conveying curtain intermediate switching device 52 arranged between the aforementioned web conveying curtain left switching device 53 and the aforementioned web conveying curtain right switching device 51 is the same as that of the web conveying curtain right switching device 51. The left end of the web intermediate switching conveying curtain 521 of the web conveying curtain intermediate switching device 52 and mentioned above is extended to and connected with the web conveying curtain left switching device 53 (as Figure 4 shown), and the right end of the web intermediate switching conveying curtain 521 corresponds to the left end of the aforementioned web conveying right switching curtain 514 (as Figure 1The feeding curtain 11 is provided with an upper clamping cotton curtain 111 and a lower clamping cotton curtain 112. The left end of the upper clamping cotton curtain 111 and the left end of the lower clamping cotton curtain 112 are inserted into the needle punching machine 1, and the left end of the upper clamping cotton curtain 111 and the left end of the lower clamping cotton curtain 112 are sleeved on the upper clamping cotton curtain left roller shaft 1111 and the lower clamping cotton curtain left roller shaft 1121 respectively, and the right end of the upper clamping cotton curtain 111 and the right end of the lower clamping cotton curtain 112 are sleeved on the upper clamping cotton curtain right roller shaft 1112 and the lower clamping cotton curtain right roller shaft 1122 respectively. The upper clamping cotton curtain left roller shaft 1111 and the lower clamping cotton curtain left roller shaft 1121 are rotatably supported on the needle punching machine 1, and the upper clamping cotton curtain right roller shaft 1112 and the lower clamping cotton curtain right roller shaft 1122 are supported in a cantilever state by the upper clamping cotton curtain roller shaft bearing seat support plate corresponding to the front side and the rear side of the upper clamping cotton curtain 111 and located between the upper clamping cotton curtain left and right roller shafts 1111, 1112, and the lower clamping cotton curtain roller shaft bearing seat support plate corresponding to the front side and the rear side of the lower clamping cotton curtain 112 and located between the lower clamping cotton curtain left and right roller shafts 1121, 1122 respectively. As shown in Figure 1 A trumpet-shaped inlet is formed between the upper and lower clamping cotton curtains 111, 112, that is, the opening on the right side is large, and the smaller the left side is.

[0039] The structure of the above-mentioned middle switching device 52 of the web conveying curtain is the same as that of the above-mentioned right switching device 51 of the web conveying curtain, so if the right end of the middle switching web conveying curtain 521 is to be in the position state shown in Figure 1 、 Figure 3 、 Figure 5 to Figure 6 and Figure 8 or in the downward inclined state shown in Figure 7 , the working process is the same as the description of the working principle of the above-mentioned right switching device 51 of the web conveying curtain, so the applicant will not repeat it.

[0040] Please refer to Figure 4 and in combination with Figure 1 and Figure 3The aforementioned web conveying curtain left switching device 53 comprises a front wall plate 531, a rear wall plate 532, a front lifting slider 533, a rear lifting slider 534, a front lifting slider guide rail 535a, a rear lifting slider guide rail 535b, a front lifting slider traction belt 535c, a rear lifting slider traction belt 535d, a front lifting slider traction belt driving wheel 535e, a front lifting slider traction belt redirection transition wheel 535f, a rear lifting slider traction belt driving wheel 535g, a rear lifting slider traction belt redirection transition wheel 535h, a traction belt driving wheel linkage shaft 536, a linkage shaft power driving mechanism 537, a set of front lifting slider traction belt limiting guide blocks 538a, and a set of rear lifting slider traction belt limiting guide blocks 538b. The front wall plate 531 and the rear wall plate 532 are supported on the floor of the use site in the use state, the front wall plate 531 and the rear wall plate 532 correspond to each other front and back, and a pair of wall plate upper support connecting plates 5311 are fixed between the upper parts of the opposite sides of the front wall plate 531 and the rear wall plate 532, a pair of wall plate lower support connecting plates 5312 are fixed between the lower parts of the opposite sides, a front wall plate accommodation cavity 5313 is longitudinally arranged in the middle of the length direction of the front wall plate 531, and a rear wall plate accommodation cavity 5321 is longitudinally arranged in the middle of the length direction of the rear wall plate 532. The front lifting slider 533 is slidingly arranged on the side of the front wall plate 531 facing the rear wall plate 532 at the position corresponding to the front wall plate accommodation cavity 5313 and forms a sliding pair with the front lifting slider guide rail 535a, and the front lifting slider guide rail 535a is fixed on the rear side of the front wall plate 531 in a longitudinal state. The rear lifting slider 534 is slidingly arranged on the side of the rear wall plate 532 facing the front wall plate 531 at the position corresponding to the rear wall plate accommodation cavity 5321 and forms a sliding pair with the rear lifting slider guide rail 535b, and the rear lifting slider guide rail 535b is fixed on the front side of the rear wall plate 532 in a longitudinal state. One end of the front lifting slider traction belt 535c is fixed to the upper part of the front lifting slider 533 through a belt upper fixing ear 535n, the middle part of the front lifting slider traction belt 535c is sequentially sleeved on the front lifting slider traction belt driving wheel 535e and the front lifting slider traction belt redirection transition wheel 535f, and the other end of the front lifting slider traction belt 535c is fixed to the lower part of the front lifting slider 533 through a belt lower fixing ear 535i. One end of the rear lifting slider traction belt 535d is fixed to the upper end of the rear lifting slider 534 through a belt upper fixing foot 535j, the middle part of the rear lifting slider traction belt 535d is sequentially sleeved on the rear lifting slider traction belt driving wheel 535g and the rear lifting slider traction belt redirection transition wheel 535h, and the other end of the rear lifting slider traction belt 535d is fixed to the lower part of the rear lifting slider 534 through a belt lower fixing foot. The front lifting slider traction belt driving wheel 535e is fixed to the front end of the aforementioned traction belt driving wheel linkage shaft 536,The front lifting slider traction belt redirection transition wheel 535f is rotatably arranged on the front lifting slider traction belt redirection transition wheel shaft 535k through a bearing, and the front lifting slider traction belt redirection transition wheel shaft 535k is fixed at the lower part of the rear side of the aforementioned front wall plate 531. The rear lifting slider traction belt driving wheel 535g is fixed at the rear end of the traction belt driving wheel linkage shaft 536. The rear lifting slider traction belt redirection transition wheel 535h is rotatably arranged on the rear lifting slider traction belt redirection transition wheel shaft 535m through a bearing, and the rear lifting slider traction belt redirection transition wheel shaft 535m is fixed at the lower part of the front side of the aforementioned rear wall plate 532 and corresponds to the front lifting slider traction belt redirection transition wheel shaft 535k. The front end of the traction belt driving wheel linkage shaft 536 is rotatably supported on the linkage shaft front bearing seat 5361 arranged on the top of the front wall plate 531, and the rear end of the traction belt driving wheel linkage shaft 536 is rotatably supported on the linkage shaft rear bearing seat 5362 arranged on the top of the rear wall plate 532. The linkage shaft power driving mechanism 537 is arranged on the top of the aforementioned rear wall plate 532 and is drivingly connected with the rear end of the traction belt driving wheel linkage shaft 536. A set of front lifting slider traction belt limiting guide blocks 538a are fixed on the side of the front wall plate 531 facing the rear wall plate 532 in a top-down spaced state and are located on the left side of the aforementioned front wall plate accommodation cavity 5313. The left side of the aforementioned front lifting slider traction belt 535c is slidingly matched with the set of front lifting slider traction belt limiting guide blocks 538a. A set of rear lifting slider traction belt limiting guide blocks 538b are fixed on the side of the rear wall plate 532 facing the front wall plate 531 in a top-down spaced state and are located on the left side of the aforementioned rear wall plate accommodation cavity 5321. The left side of the aforementioned rear lifting slider traction belt 535d is slidingly matched with the set of rear lifting slider traction belt limiting guide blocks 538b.

[0041] Continue to see Figure 4The linkage shaft power drive mechanism 537 comprises a linkage shaft power drive motor 5371, a linkage shaft power drive reduction box 5372, a linkage shaft power drive chain 5373 and a linkage shaft drive sprocket 5374. The linkage shaft power drive motor 5371 is in transmission cooperation with the linkage shaft power drive reduction box 5372, and is arranged on the top of the rear wall plate 532 together with the linkage shaft power drive reduction box 5372. A linkage shaft power drive reduction box final stage power output shaft sprocket is fixed on the linkage shaft power drive reduction box final stage power output shaft of the linkage shaft power drive reduction box 5372. One end of the linkage shaft power drive chain 5373 is sleeved on the linkage shaft power drive reduction box final stage power output shaft sprocket, and the other end is sleeved on the linkage shaft drive sprocket 5374. The linkage shaft drive sprocket 5374 is fixed on the rear end of the traction belt drive sprocket linkage shaft 536 at a position corresponding to the rear side of the rear lifting block traction belt drive sprocket 535g.

[0042] Continuing to see Figure 4 In this embodiment, the linkage shaft power drive motor 5371 is a motor with forward and reverse rotation function. A front lifting block upper limit position signal collector 539a is arranged on the front side upper part of the front wall plate 531, and a front lifting block lower limit position signal collector 539b corresponding to the front lifting block upper limit position signal collector 539a is arranged on the front side lower part of the front wall plate 531. The front lifting block upper limit position signal collector 539a and the front lifting block lower limit position signal collector 539b protrude to the right and correspond to the front wall plate accommodation cavity 5313.

[0043] A front supporting plate 522 of the intermediate switching conveying curtain roller shaft bearing seat is arranged at the front side of the intermediate switching conveying curtain 521, and a rear supporting plate 523 of the intermediate switching conveying curtain roller shaft bearing seat is arranged at the rear side of the intermediate switching conveying curtain 521. The left end of the intermediate switching conveying curtain 521 is sleeved on a left roller shaft 524 of the intermediate switching conveying curtain, and the right end of the intermediate switching conveying curtain 521 is sleeved on a right roller shaft 525 of the intermediate switching conveying curtain. The front end of the left roller shaft 524 of the intermediate switching conveying curtain is rotatably supported on the left end of the front supporting plate 522 of the intermediate switching conveying curtain roller shaft bearing seat by a front bearing seat, and the rear end of the left roller shaft 524 of the intermediate switching conveying curtain is rotatably supported on the left end of the rear supporting plate 523 of the intermediate switching conveying curtain roller shaft bearing seat by a rear bearing seat. The front end of the right roller shaft 525 of the intermediate switching conveying curtain is rotatably supported on the right end of the front supporting plate 522 of the intermediate switching conveying curtain roller shaft bearing seat by a roller shaft bearing seat, and the rear end of the right roller shaft 525 of the intermediate switching conveying curtain is rotatably supported on the right end of the rear supporting plate 523 of the intermediate switching conveying curtain roller shaft bearing seat by a roller shaft bearing seat. A front supporting plate shaft head 5221 is fixed at the front side of the front supporting plate 522 of the intermediate switching conveying curtain roller shaft bearing seat and corresponds to the front lifting slider 533. The front supporting plate shaft head 5221 is pivotally connected with a front supporting plate shaft head supporting bearing seat 52211, and the front supporting plate shaft head supporting bearing seat 52211 is fixed on the front side of the front lifting slider 533. A rear supporting plate shaft head (not shown in the figure) equivalent to the front supporting plate shaft head 5221 is fixed at the rear side of the rear supporting plate 523 of the intermediate switching conveying curtain roller shaft bearing seat and corresponds to the rear lifting slider 534. The rear supporting plate shaft head is pivotally connected with a rear supporting plate shaft head supporting bearing seat (not shown in the figure) equivalent to the front supporting plate shaft head supporting bearing seat 52211, and the rear supporting plate shaft head supporting bearing seat is fixed on the rear side of the rear lifting slider 534.

[0044] In the embodiment, the front lifting slider upper limit position signal collector 539a and the front lifting slider lower limit position signal collector 539b are stroke switches, but can also be micro switches, position proximity switches or reed switches, and can even be Hall sensing elements.

[0045] When the left end of the intermediate switching conveying curtain 521 of the structural system of the intermediate switching device 52 of the web conveying curtain is moved to the position shown in FIG. 6 by the web conveying curtain left switching device 53, the entire intermediate switching conveying curtain 521 tends to be in a horizontal state. When the right end of the intermediate switching conveying curtain 521 is moved to the position shown in FIG. 7 by the intermediate switching device 52 of the web conveying curtain, the entire intermediate switching conveying curtain 521 tends to be in a horizontal state. Figure 1 Figure 5 to Figure 6 Figure 1 Figure 3 ,​​​Figure 5 to Figure 6 to the state shown in Figure 7 When the position of the left end of the middle switching web conveying curtain 521 is lowered to the state shown in Figure 8 When the position of the left end of the middle switching web conveying curtain 521 is lowered to the state shown in

[0046] The working principle of the left switching device 53 of the web conveying curtain is as follows: under the working of the power driving motor 5371 of the linkage shaft, the power driving reduction box 5372 is driven, the power output shaft chain wheel of the power driving reduction box 5372 fixed on the power driving reduction box 5372 drives one end of the power driving chain 5373, the other end of the power driving chain 5373 drives the linkage shaft driving chain wheel 5374, the linkage shaft driving chain wheel 5374 drives the traction belt driving wheel linkage shaft 536 to rotate, and then the traction belt driving wheel linkage shaft 536 drives the front and rear lifting slide block traction belt driving wheels 535e and 535g to rotate, the front and rear lifting slide block traction belt driving wheels 535e and 535g drive the front and rear lifting slide blocks 533 and 534 to slide upwards along the front and rear lifting slide block guide rails 535a and 535b, and then the front and rear lifting slide blocks 533 and 534 drive the left end of the middle switching web conveying curtain 521 to rise upwards, i.e. to move upwards, to the state shown in Figure 1 and Figure 5 to Figure 6 The limit of the upward sliding of the front and rear lifting slide blocks 533 and 534 is that the front lifting slide block 533 touches the front lifting slide block upper limit position signal collector 539a, when it is touched, the front lifting slide block upper limit position signal collector 539a feeds back a signal to the electrical controller, and the electrical controller sends a signal to the power driving motor 5371 of the linkage shaft to stop working. Under the working of the middle switching device 52 of the web conveying curtain, the right end of the middle switching web conveying curtain 521 is lowered to the state shown in Figure 7In the state shown, the upper and lower cotton web layers 6 and 7 enter the needle loom in a combined state. Figure 8 In the state shown, the upper and lower cotton web layers 6 and 7 are fed into the hot melt machine by the hot melt machine cotton web input curtain 2 in the superimposed state for hot melt compounding. Figure 7 As an example, since the right end of the cotton mesh intermediate switching conveying curtain 521 is tilted downward, the limit position of its downward tilt, that is, the limit degree, is based on the structural system of the cotton mesh conveying curtain intermediate switching device 52, which is equivalent to the front sliding guide block 526 of the traction slider 5156 before the right switching curtain angle changes, touching the signal acquisition device 527 equivalent to the front traction slider downward limit signal collector 5158c.

[0047] Application Example 1:

[0048] See Figure 5 And combined Figure 1 ,exist Figure 5 In the state shown, the upper web layer 6 laid out by the first web laying machine I3 passes from right to left in sequence through the first web output curtain I31, the web conveying right switching curtain 514, the web intermediate switching conveying curtain 521, and the lower quilting curtain 112, and enters the needling machine 1 for needle punching. Simultaneously, the lower web layer 7 laid out by the second web laying machine II4 passes from right to left in sequence through the second web output curtain II41, the transition curtain 42, the web transition conveying curtain 20, the transition bottom curtain 30, and the hot melt machine web input curtain 2 of the second web laying machine II4, and is then conveyed to the left by the hot melt machine web input curtain 2 to the hot melt machine for hot melting, thereby obtaining a needle-punched non-woven product and a hot melt composite non-woven product, each of which proceeds independently, i.e., without interfering with each other.

[0049] Application Example 2:

[0050] See Figure 6 , as described above by the applicant and by the Figure 6 In the state shown, the upper web layer 6 passes from right to left in sequence through the first web output curtain 31 of the first web laying machine I3 and the web conveying right switching curtain 514, and is then superimposed on the upper surface of the lower web layer 7, that is, overlapped with the lower web layer 7. At the same time, the lower web layer 7 passes from right to left in sequence through the second web output curtain II41 of the second web laying machine II4, the transition curtain 42, the web transition conveying curtain 20, the transition bottom curtain 30, and the hot melt machine web input curtain 2, together with the upper web layer 6 superimposed on the lower web layer 7 at the position of the transition bottom curtain 30, and is conveyed by the hot melt machine web input curtain 2 to the hot melt machine for hot melt compounding, thereby obtaining two identical or different high-weight hot melt non-woven products described above. Although this application example 2 only obtains one hot melt non-woven product compared to application example 1, it meets the requirement of efficiently obtaining high-weight hot melt non-woven products.

[0051] Application Example 3:

[0052] Please refer to Figure 7 , in Figure 7 the state shown, the running track of the upper web layer 6 is the same as that in application example 1, while the running track of the lower web layer 7 is changed in direction at the left end position of the transition bottom curtain 30 due to the upward inclination of the left end of the web middle switching conveying curtain 521, and is conveyed toward the lower pinching curtain 112, and enters the needle punching machine for needle punching together with the upper web layer 6 stacked above it, to obtain a needle punched nonwoven product with large weight per unit area.

[0053] Application Example 4:

[0054] Please refer to Figure 8 , in Figure 8 the state shown, the path of the lower web layer 7 running from right to left is the same as that in application example 1 or application example 2, while the upper web layer 6 runs from below the web middle switching conveying curtain 521 and is stacked on the lower web layer 7 due to the upward inclination of the right end of the web middle switching conveying curtain 521, and reaches the hot melting machine web input curtain 2 together with the lower web layer 7, and is conveyed by the hot melting machine web input curtain 2 to the hot melting machine for hot melting to obtain a hot melt nonwoven product with large weight per unit area as described for application example 2.

[0055] As can be seen from the above description, the web middle switching conveying curtain 521 with the bridge device can meet diversified process routes, and the web channel is flexible and variable, which is very advantageous for products with weight per unit area of 100-800 g / m2 and 800-2000 g / m2 for needle punching, hot melting and needle punching hot melting and other processing routes. At the same time, the upper and lower layer conveying can maximize the utilization rate of the equipment, meet the production requirements of large weight per unit area products, and fully utilize the production capacity of the downstream equipment in the complete nonwoven production line. The arbitrary switching combination mode can greatly avoid the impact of equipment maintenance on production. The present application has good modularization splicing and can realize various connection modes to meet the flexible and variable combination mode of the process. In addition, it also has the advantages of easy adjustment, use and maintenance.

[0056] In summary, the technical solution provided by the present application makes up for the shortcomings in the prior art, successfully completes the invention task, and truly realizes the technical effects described by the applicant in the above technical effect column.

Claims

1. A needle-punched and thermally-fused, selectively nonwoven web of textile fibers conveying system, characterized in that The invention relates to a nonwoven fabric production line, which comprises a needle loom (1) provided on a needle loom base (12) and equipped with a feeding clamp (11), a hot melt machine web inputting curtain (2) for inputting the web to the left into the hot melt machine, which passes in front of the needle loom base (12) of the needle loom (1) and extends to the left to the hot melt machine, a first laying head (3) with a first web output curtain I (31) and a second laying head (4) with a second web output curtain II (41), which is located to the right of the first laying head (3) and the first laying head (3) is provided on a laying head support (32), which is provided with a laying head support apron (321), the right end of which extends in a horizontal cantilever state to the right of the laying head support (32), a transition curtain (42) is provided between the second laying head (4) and the right end of the laying head support apron (321) towards the upper side, which is inclined from the second laying head (4) towards the laying head support apron (321) for receiving the nonwoven fabric web output by the second web output curtain II (41), a web transition conveying curtain drive box (10), a web transition conveying curtain (20) and a transition bottom curtain (30), the web transition conveying curtain drive box (10) is located to the left of the first laying head (3), which is provided on a support in the use state, the left end of the web transition conveying curtain (20) is drivingly connected to the web transition conveying curtain drive box (10) through a web transition conveying curtain left curtain roller (201), while the right end is pivotally arranged on the lower side of the laying head support apron (321) through a web transition conveying curtain redirection roller (202), the right end of the transition bottom curtain (30) is drivingly connected to the web transition conveying curtain drive box (10) through a web transition conveying curtain right curtain roller (301), while the left end corresponds to the right end of the hot melt machine web inputting curtain (2), a web conveying channel switching mechanism (5) is provided on the floor of the use site at a position corresponding to the right end of the hot melt machine web inputting curtain (2) and the web transition conveying curtain drive box (10), the left side of the web conveying channel switching mechanism (5) corresponds to the feeding clamp (11) or the right end of the hot melt machine web inputting curtain (2), while the right side of the web conveying channel switching mechanism (5) corresponds to the left end of the first web output curtain I (31), the middle part of the transition bottom curtain (30) passes through the lower part of the web conveying channel switching mechanism (5).

2. The needlepunched and thermofusible selectively nonwoven web of fibers delivery system according to claim 1, characterized in that The web conveying path switching mechanism (5) comprises a right web conveying curtain switching device (51), a middle web conveying curtain switching device (52) and a left web conveying curtain switching device (53) arranged on the ground of the use site in the use state, the right web conveying curtain switching device (51) is located between the web transition conveying curtain driving box (10) and the middle web conveying curtain switching device (52), and the right side of the right web conveying curtain switching device (51) is supported on the left side of the first laying machine I (3) at a position corresponding to the left end of the first web output curtain I (31), the middle web conveying curtain switching device (52) is arranged between the left web conveying curtain switching device (53) and the right web conveying curtain switching device (51), the left web conveying curtain switching device (53) is arranged between the right side of the hot melt machine web input curtain (2) and the middle web conveying curtain switching device (52) and connected with the middle web conveying curtain switching device (52); the upper part of the left web conveying curtain switching device (53) in the height direction corresponds to the right side of the needle punching machine (1); the middle part of the transition bottom curtain (30) passes through the lower part of the right web conveying curtain switching device (51), the middle web conveying curtain switching device (52) and the left web conveying curtain switching device (53).

3. The needlepunched and thermofusible selectively nonwoven web of fibers delivery system according to claim 2, characterized in that The first laying machine I (3) extends with a pair of laying machine wings (33) corresponding to each other in front and back; the right switching device of the web conveying curtain (51) comprises a front switching wall plate (511) and a rear switching wall plate (512) of the web conveying curtain supported on the ground floor of the use place in the use state, the front switching wall plate (511) and the rear switching wall plate (512) of the web conveying curtain correspond to each other in front and back, and the upper end and the lower end of the opposite side of the front switching wall plate (511) and the rear switching wall plate (512) of the web conveying curtain are supported and connected by a pair of wall plate upper connecting support beams (513a) and a pair of wall plate lower connecting support beams (513b) respectively; a right switching curtain (514), a right switching curtain angle change front traction mechanism (515), a right switching curtain angle change rear traction mechanism (516), a traction sliding block lifting linkage shaft (517) and a traction sliding block lifting linkage shaft driving mechanism (518), the left end of the right switching curtain (514) is sleeved on the right switching curtain left curtain roller (5141), and the right end of the right switching curtain (514) is sleeved on the right switching curtain right curtain roller (5142) and corresponds to the left end of the first web output curtain I (31), the right switching curtain left curtain roller (5141) is located on the left side between the front switching wall plate (511) and the rear switching wall plate (512) of the web conveying curtain, a front bearing seat supporting plate (5143) is arranged at a position corresponding to the front side of the right switching curtain (514), and a rear bearing seat supporting plate (5144) is arranged at a position corresponding to the rear side of the right switching curtain (514), the right switching curtain left curtain roller front shaft head (51411) of the right switching curtain left curtain roller (5141) is rotatably supported on the right switching curtain left curtain roller front shaft head supporting bearing seat fixing plate (51413) through the right switching curtain left curtain roller front shaft head supporting bearing seat (51412), the right switching curtain left curtain roller front shaft head supporting bearing seat fixing plate (51413) is fixed with the left end front side of the front bearing seat supporting plate (5143), the right switching curtain right curtain roller front shaft head (51421) of the right switching curtain right curtain roller (5142) is rotatably supported on the right switching curtain right curtain roller front shaft head supporting bearing seat fixing plate (51423) through the right switching curtain right curtain roller front shaft head supporting bearing seat (51422), the right switching curtain right curtain roller front shaft head supporting bearing seat fixing plate (51423) is fixed with the right end front side of the front bearing seat supporting plate (5143), the right switching curtain left curtain roller rear shaft head of the right switching curtain left curtain roller (5141) is rotatably supported on the right switching curtain left curtain roller rear shaft head supporting bearing seat fixing plate through the right switching curtain left curtain roller rear shaft head supporting bearing seat,The fixed plate of the bearing seat of the rear axle head of the right curtain roller of the right switching curtain of the web conveyer is fixed to the left end of the rear bearing seat support plate (5144), the fixed plate of the bearing seat of the rear axle head of the right curtain roller of the right switching curtain of the web conveyer is fixed to the right end of the rear bearing seat support plate (5144), the front axle head (51421) of the right curtain roller of the right switching curtain of the web conveyer and the end of the rear axle head of the right curtain roller of the right switching curtain of the web conveyer are rotatably supported by the bearing seat between the pair of web laying machine wing plates (33) of the first web laying machine I (3), the front traction chain (5153) of the right switching curtain angle change, the upper part of the right switching curtain angle change is connected with the right switching curtain angle change through the fixed connection ear (51531) fixed to the front traction chain of the right switching curtain angle change (5156), the middle part of the right switching curtain angle change is sequentially sleeved on the right switching curtain angle change drive sprocket (5154) and the right switching curtain angle change transition sprocket (5155), and the other end of the right switching curtain angle change is fixed with the chain connecting lug (5151).The right switching curtain angle change front traction slider (5156) and the front traction slider sliding guide rail (5157) constitute a sliding pair, and the front traction slider sliding guide rail (5157) is fixed to the rear side of the front switching wallboard (511) of the web conveying curtain in a longitudinal state. The right switching curtain angle change front traction chain limiting guide block (5158a) is spaced and distributed from top to bottom, and is fixed to the rear side of the web conveying curtain front switching wallboard (511) at a position on the right side of the web conveying curtain front switching wallboard cavity (5111) of the web conveying curtain front switching wallboard (511). The right side of the right switching curtain angle change front traction chain (5153) is in sliding cooperation with the group of right switching curtain angle change front traction chain limiting guide blocks (5158a). The front traction slider sliding guide rail (5157) is located on the left side of the web conveying curtain front switching wallboard cavity (5111). The front traction slider up-limit signal collector (5158b) is arranged on the upper front side of the web conveying curtain front switching wallboard (511) and protrudes into the web conveying curtain front switching wallboard cavity (5111) to the left. The front traction slider down-limit signal collector (5158c) is arranged on the lower front side of the web conveying curtain front switching wallboard (511) and protrudes into the web conveying curtain front switching wallboard cavity (5111) to the left. The right switching curtain angle change rear traction mechanism (516) comprises an upper connecting lifting lug (5161), a rear support lifting rod (5162), a right switching curtain angle change rear traction chain (5163), a right switching curtain angle change rear traction chain drive sprocket (5164), a right switching curtain angle change rear traction chain transition sprocket (5165), a right switching curtain angle change rear traction slider (5166), a rear traction slider sliding guide rail (5167), and a right switching curtain angle change rear traction chain limiting guide block (5168). The upper connecting lifting lug (5161) is fixed to the right switching curtain angle change rear traction slider (5166). The upper end of the rear support lifting rod (5162) is hinged to the right switching curtain angle change rear traction slider (5166) through a rear support upper pin shaft (51621). The lower end of the rear support lifting rod (5162) is hinged to a rear support lifting rod lower pin shaft hinged plate, which is fixed to the left side of the rear side of the rear bearing seat support plate (5144). One end of the right switching curtain angle change rear traction chain (563) is connected to the upper connecting lifting lug (5161). The middle part of the right switching curtain angle change rear traction chain (5153) is sequentially sleeved on the right switching curtain angle change rear traction chain drive sprocket (5164) and the right switching curtain angle change rear traction chain transition sprocket (5165). The other end of the right switching curtain angle change rear traction chain (5163) is fixed to a lower connecting lifting lug (5169) fixed to the lower part of the right switching curtain angle change rear traction slider (5166).The right switch curtain angle change after traction chain drive sprocket (5164) is double row sprocket structure and is fixed on the rear end of the traction slider lifting linkage shaft (517), the right switch curtain angle change after traction chain transition sprocket (5165) is rotatably arranged on the front lower part of the web conveying curtain rear switching wallboard (512) through the right switch curtain angle change after traction chain transition sprocket shaft (51651), the right switch curtain angle change after traction slider (5166) and the rear traction slider sliding guide rail (5167) constitute a sliding pair, and the rear traction slider sliding guide rail (5167) is fixed on the front side of the web conveying curtain rear switching wallboard (512) in a longitudinal state, the number of the right switch curtain angle change after traction chain limiting guide blocks (5168) is a group distributed from top to bottom and fixed on the front side of the web conveying curtain rear switching wallboard (512) at the position on the right side of the web conveying curtain rear switching wallboard cavity (5121) of the web conveying curtain rear switching wallboard (512), the right side of the right switch curtain angle change after traction chain (5163) is in sliding fit with the group of right switch curtain angle change after traction chain limiting guide blocks (5168), the rear traction slider sliding guide rail (5167) is located on the left side of the web conveying curtain rear switching wallboard cavity (5121), the front end of the traction slider lifting linkage shaft (517) is rotatably supported on the top of the web conveying curtain front switching wallboard (511) through the traction slider lifting linkage shaft front bearing seat (5171), and the rear end is rotatably supported on the top of the web conveying curtain rear switching wallboard (512) through the traction slider lifting linkage shaft rear bearing seat (5172), the traction slider lifting linkage shaft driving mechanism (518) comprises a traction slider lifting linkage shaft driving motor (5181) and a traction slider lifting linkage shaft driving speed reducer (5182), the traction slider lifting linkage shaft driving motor (5181) is in transmission fit with the traction slider lifting linkage shaft driving speed reducer (5182) and is fixed on the top of the web conveying curtain rear switching wallboard (512) together with the traction slider lifting linkage shaft driving speed reducer (5182) and the traction slider lifting linkage shaft driving motor (5181), a speed reducer last stage power output shaft sprocket is fixed on the speed reducer last stage power output shaft of the traction slider lifting linkage shaft driving speed reducer (5182), the speed reducer last stage power output shaft sprocket is in transmission connection with the right switch curtain angle change after traction chain drive sprocket (5164) of the double row sprocket structure through a transmission chain, the middle part of the transition bottom curtain (30) passes through the lower part between the web conveying curtain front switching wallboard (511) and the web conveying curtain rear switching wallboard (512) and the lower part of the web conveying curtain intermediate switching device (52), and the left end of the transition bottom curtain (30) extends to the left side of the hot melting machine web input curtain (2) after passing through the lower part of the web conveying curtain left switching device (53) and corresponding to the right end of the hot melting machine web input curtain (2).

4. The needlepunched and thermofusible selectively nonwoven web of fibers delivery system according to claim 3, characterized in that The front traction sliding block up-limit signal collector (5158b) and the front traction sliding block down-limit signal collector (5158c) are travel switches, micro switches, position proximity switches, reed switches or Hall inductive elements; the traction sliding block lifting linkage shaft driving motor (5181) is a motor with forward and reverse rotation functions.

5. The needlepunched and thermofusible selectively nonwoven web of fibers delivery system according to claim 3, characterized in that The structure of the middle web conveying curtain switching device (52) arranged between the left web conveying curtain switching device (53) and the right web conveying curtain switching device (51) is the same as that of the right web conveying curtain switching device (51), the left end of the middle web switching conveying curtain (521) of the middle web conveying curtain switching device (52) extends to and is connected with the left web conveying curtain switching device (53), and the right end of the middle web switching conveying curtain (521) corresponds to the left end of the right web conveying curtain (514); the feeding nip curtain (11) comprises an upper nip curtain (111) and a lower nip curtain (112), the left ends of the upper nip curtain (111) and the lower nip curtain (112) extend into the needle punching machine (1), and the left ends of the upper nip curtain (111) and the lower nip curtain (112) are respectively sleeved on the left roller shaft (1111) of the upper nip curtain and the left roller shaft (1121) of the lower nip curtain, and the right ends of the upper nip curtain (111) and the lower nip curtain (112) are respectively sleeved on the right roller shaft (1112) of the upper nip curtain and the right roller shaft (1122) of the lower nip curtain, the left roller shaft (1111) of the upper nip curtain and the left roller shaft (1121) of the lower nip curtain are rotatably supported on the needle punching machine (1), and the right roller shaft (1112) of the upper nip curtain and the right roller shaft (1122) of the lower nip curtain are respectively in cantilever state through the upper nip curtain roller shaft bearing seat support plate corresponding to the front side and the rear side of the upper nip curtain (111) and located between the left and right roller shafts (1111, 1112) of the upper nip curtain and the lower nip curtain roller shaft bearing seat support plate corresponding to the front side and the rear side of the lower nip curtain (112) and located between the left and right roller shafts (1121, 1122) of the lower nip curtain.

6. The needlepunched and thermofusible selectively nonwoven web of fibers delivery system according to claim 5, characterized in that The left switching device (53) of the web conveying curtain comprises a front wall plate (531), a rear wall plate (532), a front lifting slider (533), a rear lifting slider (534), a front lifting slider guide rail (535a), a rear lifting slider guide rail (535b), a front lifting slider traction belt (535c), a rear lifting slider traction belt (535d), a front lifting slider traction belt driving wheel (535e), a front lifting slider traction belt redirection transition wheel (535f), a rear lifting slider traction belt driving wheel (535g), a rear lifting slider traction belt redirection transition wheel (535h), a traction belt driving wheel linkage shaft (536), a linkage shaft power driving mechanism (537), a group of front lifting slider traction belt limiting guide blocks (538a), and a group of rear lifting slider traction belt limiting guide blocks (538b). The front wall plate (531) and the rear wall plate (532) are supported on the ground floor of the use site in the use state. The front wall plate (531) and the rear wall plate (532) correspond to each other in front and back, and a pair of wall plate upper support connecting plates (5311) are fixed between the upper parts of the opposite sides of the front wall plate (531) and the rear wall plate (532), and a pair of wall plate lower support connecting plates (5312) are fixed between the lower parts of the opposite sides. A front wall plate accommodation cavity (5313) is longitudinally formed in the middle of the length direction of the front wall plate (531), and a rear wall plate accommodation cavity (5321) is longitudinally formed in the middle of the length direction of the rear wall plate (532). The front lifting slider (533) is slidably arranged on the side of the front wall plate (531) facing the rear wall plate (532) at the position corresponding to the front wall plate accommodation cavity (5313) and forms a sliding pair with the front lifting slider guide rail (535a), and the front lifting slider guide rail (535a) is fixed on the rear side of the front wall plate (531) in a longitudinal state. The rear lifting slider (534) is slidably arranged on the side of the rear wall plate (532) facing the front wall plate (531) at the position corresponding to the rear wall plate accommodation cavity (5321) and forms a sliding pair with the rear lifting slider guide rail (535b), and the rear lifting slider guide rail (535b) is fixed on the front side of the rear wall plate (532) in a longitudinal state. One end of the front lifting slider traction belt (535c) is fixed to the upper part of the front lifting slider (533) through the upper belt fixing ear (535n), the middle part of the front lifting slider traction belt (535c) is sequentially sleeved on the front lifting slider traction belt driving wheel (535e) and the front lifting slider traction belt redirection transition wheel (535f), and the other end of the front lifting slider traction belt (535c) is fixed to the lower part of the front lifting slider (533) through the lower belt fixing ear (535i). One end of the rear lifting slider traction belt (535d) is fixed to the upper end of the rear lifting slider (534) through the upper belt fixing foot (535j),The middle part of the rear lifting slider traction belt (535d) is sequentially sleeved on the rear lifting slider traction belt driving wheel (535g) and the rear lifting slider traction belt redirection transition wheel (535h), and the other end of the rear lifting slider traction belt (535d) is fixed to the lower part of the rear lifting slider (534) through a belt lower fixing foot. The front lifting slider traction belt driving wheel (535e) is fixed to the front end of the traction belt driving wheel linkage shaft (536). The front lifting slider traction belt redirection transition wheel (535f) is rotatably arranged on the front lifting slider traction belt redirection transition wheel shaft (535k) through a bearing, and the front lifting slider traction belt redirection transition wheel shaft (535k) is fixed to the lower part of the rear side of the front wall plate (531). The rear lifting slider traction belt driving wheel (535g) is fixed to the rear end of the traction belt driving wheel linkage shaft (536). The rear lifting slider traction belt redirection transition wheel (535h) is rotatably arranged on the rear lifting slider traction belt redirection transition wheel shaft (535m) through a bearing, and the rear lifting slider traction belt redirection transition wheel shaft (535m) is fixed to the lower part of the front side of the rear wall plate (532) and corresponds to the front lifting slider traction belt redirection transition wheel shaft (535k). The front end of the traction belt driving wheel linkage shaft (536) is rotatably supported on the linkage shaft front bearing seat (5361) arranged on the top of the front wall plate (531), and the rear end of the traction belt driving wheel linkage shaft (536) is rotatably supported on the linkage shaft rear bearing seat (5362) arranged on the top of the rear wall plate (532). The linkage shaft power driving mechanism (537) is arranged on the top of the rear wall plate (532) and is in transmission connection with the rear end of the traction belt driving wheel linkage shaft (536). A group of front lifting slider traction belt limiting guide blocks (538a) are fixed in a self-top-to-bottom interval state on the side of the front wall plate (531) facing the rear wall plate (532) and are located on the left side of the front wall plate accommodation cavity (5313). The left side of the front lifting slider traction belt (535c) is in sliding fit with the group of front lifting slider traction belt limiting guide blocks (538a). A group of rear lifting slider traction belt limiting guide blocks (538b) are fixed in a self-top-to-bottom interval state on the side of the rear wall plate (532) facing the front wall plate (531) and are located on the left side of the rear wall plate accommodation cavity (5321). The left side of the rear lifting slider traction belt (535d) is in sliding fit with the group of rear lifting slider traction belt limiting guide blocks (538b). The left end of the web middle switching conveying curtain (521) extends between the front wall plate (531) and the rear wall plate (532) and then extends to the right side between the front wall plate (531) and the rear wall plate (532). The left end front side of the web middle switching conveying curtain (521) is connected with the front lifting slider (533) at a position corresponding to the front lifting slider (533).And the left end rear side of the middle switching conveying curtain (521) in the cotton web is connected with the rear lifting slider (534) in the position corresponding to the rear lifting slider (534); the left end of the transition bottom curtain (30) passes through the lower part between the front wall plate (531) and the rear wall plate (532) and then extends to the left side between the front wall plate (531) and the rear wall plate (532) corresponding to the right end of the hot melt machine cotton web input curtain (2).

7. The needlepunched and thermofusible selectively nonwoven web of fibers delivery system according to claim 6, characterized in that The linkage shaft power driving mechanism (537) comprises a linkage shaft power driving motor (5371), a linkage shaft power driving reduction box (5372), a linkage shaft power driving chain (5373) and a linkage shaft driving sprocket (5374), the linkage shaft power driving motor (5371) is in transmission cooperation with the linkage shaft power driving reduction box (5372), and the linkage shaft power driving reduction box (5372) is arranged at the top of the rear wall plate (532) together with the linkage shaft power driving motor (5371), a linkage shaft power driving reduction box last stage power output shaft sprocket is fixed on the linkage shaft power driving reduction box last stage power output shaft of the linkage shaft power driving reduction box (5372), one end of the linkage shaft power driving chain (5373) is sleeved on the linkage shaft power driving reduction box last stage power output shaft sprocket, and the other end is sleeved on the linkage shaft driving sprocket (5374), the linkage shaft driving sprocket (5374) is fixed at the rear end of the traction belt driving wheel linkage shaft (536) at a position corresponding to the rear side of the rear lifting sliding block traction belt driving wheel (535g).

8. The needlepunched and thermofusible selectively nonwoven web of fibers delivery system according to claim 7, characterized in that The linkage shaft power drive motor (5371) is a motor with forward and reverse rotation function, a front lifting slider upper limit position signal collector (539a) is arranged on the front upper side of the front wall plate (531), and a front lifting slider lower limit position signal collector (539b) corresponding to the front lifting slider upper limit position signal collector (539a) is arranged on the front lower side of the front wall plate (531), the front lifting slider upper limit position signal collector (539a) and the front lifting slider lower limit position signal collector (539b) are right out and correspond to the front wall plate accommodation cavity (5313).

9. The needlepunched and thermofusible selectively nonwoven web of fibers delivery system according to claim 6, characterized in that A middle switching conveying curtain roller shaft bearing seat front supporting plate (522) is arranged on the front side of the middle switching conveying curtain (521), a middle switching conveying curtain roller shaft bearing seat rear supporting plate (523) is arranged on the rear side of the middle switching conveying curtain (521), the left end of the middle switching conveying curtain (521) is sleeved on the middle switching conveying curtain left roller shaft (524), and the right end of the middle switching conveying curtain (521) is sleeved on the middle switching conveying curtain right roller shaft (525); the front end of the middle switching conveying curtain left roller shaft (524) is rotatably supported on the left end of the middle switching conveying curtain roller shaft bearing seat front supporting plate (522) through a front bearing seat, the rear end of the middle switching conveying curtain left roller shaft (524) is rotatably supported on the left end of the middle switching conveying curtain roller shaft bearing seat rear supporting plate (523) through a rear bearing seat, the front end of the middle switching conveying curtain right roller shaft (525) is rotatably supported on the right end of the middle switching conveying curtain roller shaft bearing seat front supporting plate (522) through a roller shaft bearing seat, and the rear end of the middle switching conveying curtain right roller shaft (525) is rotatably supported on the right end of the middle switching conveying curtain roller shaft bearing seat rear supporting plate (523) through a roller shaft bearing seat; a front supporting plate shaft head (5221) is fixed on the front side of the middle switching conveying curtain roller shaft bearing seat front supporting plate (522) and corresponds to the front lifting slider (533), the front supporting plate shaft head (5221) is pivotally connected with a front supporting plate shaft head supporting bearing seat (52211), and the front supporting plate shaft head supporting bearing seat (52211) is fixed on the front side of the front lifting slider (533); a rear supporting plate shaft head is fixed on the rear side of the middle switching conveying curtain roller shaft bearing seat rear supporting plate (523) and corresponds to the rear lifting slider (534), the rear supporting plate shaft head is pivotally connected with a rear supporting plate shaft head supporting bearing through a rear supporting plate shaft head supporting bearing, and the rear supporting plate shaft head supporting bearing is fixed on the rear side of the rear lifting slider (534).

10. The needlepunched and thermofusible selectively nonwoven web of fibers delivery system according to claim 8, characterized in that The front lifting slider upper limit position signal collector (539a) and the front lifting slider lower limit position signal collector (539b) are travel switches, micro switches, position proximity switches, reed switches or Hall inductive elements.

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