CN114734691B - Production method of composite warp knitted fabric - Google Patents
Production method of composite warp knitted fabric Download PDFInfo
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- CN114734691B CN114734691B CN202210539392.3A CN202210539392A CN114734691B CN 114734691 B CN114734691 B CN 114734691B CN 202210539392 A CN202210539392 A CN 202210539392A CN 114734691 B CN114734691 B CN 114734691B
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- knitted fabric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/08—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/04—Blended or other yarns or threads containing components made from different materials
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/44—Yarns or threads characterised by the purpose for which they are designed
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/04—Cellulosic plastic fibres, e.g. rayon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/106—Carbon fibres, e.g. graphite fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2101/00—Inorganic fibres
- D10B2101/10—Inorganic fibres based on non-oxides other than metals
- D10B2101/12—Carbon; Pitch
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
- D10B2201/20—Cellulose-derived artificial fibres
- D10B2201/22—Cellulose-derived artificial fibres made from cellulose solutions
- D10B2201/24—Viscose
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Abstract
The invention relates to the field of fabric production methods, and provides a production method of a composite warp-knitted fabric, wherein a skin-friendly surface layer, a 3D breathable layer and an anti-slip bottom layer are compounded through a compounding mechanism to form the warp-knitted fabric, the radiuses of the skin-friendly surface layer, the 3D breathable layer, the anti-slip bottom layer and the warp-knitted fabric in the unreeling and reeling processes are changed, the actual linear speeds V1, V2 and V3 of three unreeling drums are controlled in real time through a system, the speed of a reeling motor is kept, when three-layer fabrics are compounded, the situation that one of the fabrics is too stretched or too small is avoided, the situation that wrinkles or tightens after the fabrics are compounded is prevented, the compounding quality of the fabrics is improved, and meanwhile, the tensioning force of the compounded fabrics is adjusted through a first speed compensation coefficient f1, so that the technical problems of poor compounding effect of the compounded 3D warp-knitted fabric and poor quality of the compounded products are solved.
Description
Technical Field
The invention relates to a fabric production method, in particular to a production method of a composite warp knitting fabric.
Background
The existing warp-knitted fabric is compounded through a compounding mechanism after warp-knitted, the thickness of the warp-knitted fabric is larger, the air permeability and the buffer performance are good, the 3D fabric can be used for producing mattresses, cushions and the like, the top layer and the bottom layer of the 3D fabric are connected through monofilaments generally, when the skin contacts the 3D fabric, the skin of a human body is in direct contact with the 3D fabric possibly to feel uncomfortable due to the action of the monofilaments, therefore, the skin effect of the 3D fabric is poor, the upper surface and the lower surface of the 3D fabric are required to be compounded with one layer of surface layer, in the compounding process, the elasticity of the 3D fabric is large, the elasticity of the 3D fabric is certain, the fabrics compounded on the two surfaces of the 3D fabric possibly have certain elasticity, the fabrics are compounded under the condition of different tensions, wrinkles or tightens are possibly to be caused on the fabrics on the two surfaces, the quality of a product is influenced, if the fabrics on the two surfaces are in the tightening state, the fabrics on the two surfaces are usually stressed to deform along with the deformation of the 3D fabric, and the original tightening is possibly to cause the breakage and damage of the fabrics on the two surfaces.
Disclosure of Invention
Therefore, the invention provides a production method of the composite warp knitted fabric aiming at the problems. The method solves the technical problems that the composite effect of the composite 3D warp knitted fabric is poor and the quality of the composite product is poor.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the production method of the composite warp knitted fabric comprises the following steps:
(1) Manufacturing a skin-friendly surface layer: warp knitting by a first warp knitting machine to form a skin-friendly surface layer;
(2) Manufacturing a 3D breathable layer: warp knitting by a second warp knitting machine or a fabric production device to form a 3D breathable layer;
(3) Manufacturing an anti-slip bottom layer: warp knitting by a third warp knitting machine to form an anti-slip bottom layer;
(4) Compounding: compounding the skin-friendly surface layer, the 3D breathable layer and the anti-slip bottom layer through a compounding mechanism to form a warp knitting fabric;
the method comprises the steps that a skin-friendly surface layer, a 3D breathable layer and an anti-slip bottom layer are rolled through three unreeling drums respectively, a compound mechanism comprises three unreeling rollers, three unreeling motors, one compound roller, one reeling roller and a reeling motor, wherein the unreeling rollers, the unreeling motors, the one compound roller, the one reeling roller and the one reeling motor are sequentially arranged, the unreeling drums are arranged on the unreeling rollers, radius detection devices are respectively arranged on each unreeling roller and each reeling roller, the radius detection devices detect real-time radiuses of the skin-friendly surface layer, the 3D breathable layer and the anti-slip bottom layer, the real-time radiuses are R1, R2 and R3 respectively, the radius of the unreeling rollers is RO, the actual linear speeds of the three unreeling rollers are V1, V2 and V3, the linear speeds of the system are V4, the radius of the warp-knitted fabric of the reeling rollers is R5, the real-time linear speeds of the warp-knitted fabric of the reeling rollers are V5, V5 = V4, the real-time radiuses of the warp-knitted fabric of the system is regulated to V1, V2 and V1 = f1 = V5/R1 = 0/R1, and V1 = 0/f 1 = 0 f 1; after compounding, the rolled warp knitted fabric passes through a tension detection mechanism, the tension force in the warp knitted fabric conveying process is measured to be F1, the standard value of the warp knitted fabric tension force set by a system is F0, f1=1+ (F1-FO)/(n is FO), and n is the speed regulating coefficient set by the system.
Further:
in the method (4), before the skin-friendly surface layer and the anti-slip bottom layer are compounded, the skin-friendly surface layer and the anti-slip bottom layer are respectively unfolded through an unfolding mechanism, the unfolding mechanism comprises an unfolding roller which is rotatably arranged and an unfolding motor which drives the unfolding roller to rotate, unfolding strips are symmetrically arranged on the outer surface of the unfolding roller, and the unfolding strips are spirally wound on the outer surface of the unfolding roller.
The top of the 3D ventilation layer is provided with a plurality of long-strip-shaped first convex parts, and the bottom of the 3D ventilation layer is provided with a plurality of long-strip-shaped second convex parts.
In method (2), a 3D breathable layer is manufactured: on the second warp knitting machine, the yarns on one or more second guide bars on the left side weave a first surface layer, the second guide bars on the right side weave a monofilament layer, the yarns on one or more second guide bars on the right side weave a second surface layer, a system control adjusting part acts to move the positions of two second crochets so as to adjust the position of the center line between the two second crochets, the positions of the yarns hooked on the second guide bars by the two second crochets are changed, the positions of the yarns on the first surface layer and the second surface layer are changed, a first convex part is formed on the first surface layer, a second convex part is formed on the second surface layer, and the monofilament length of the monofilament layer is changed according to the change of the distance between the two second crochets;
the second warp knitting machine is provided with two adjusting parts which respectively adjust the positions of the two second crochets.
The first convex part and the second convex part are arranged symmetrically up and down, when the first convex part or the second convex part is formed, the swing frequency of the guide bars is gradually accelerated, the speeds of the second crochets are correspondingly accelerated gradually, after reaching the top end of the second convex part, the swing frequency of the guide bars is gradually reduced in the resetting process of the two second crochets, and the speeds of the second crochets are correspondingly reduced gradually, so that the warp knitting density of the first convex part and the second convex part is gradually increased along the direction of the top end.
The second crochet hook moves one bar position at a time.
The first convex part and the second convex part are of long arc surface structures.
The adjusting part is a driving motor.
The skin-friendly surface layer is made of elastic yarns, and the elastic yarns comprise Modal fibers arranged in the middle and at least one graphene yarn wound on the Modal fibers.
The anti-slip bottom layer and the skin-friendly surface layer have the same structure.
By adopting the technical scheme, the invention has the beneficial effects that:
the invention conveys the skin-friendly surface layer, the 3D breathable layer and the anti-slip bottom layer of the warp knitted fabric, in order to maintain the stability of the system in the conveying process, therefore, the linear speed V4 of the winding roller is fixed, namely, the winding motor is kept unchanged, V5 is the real-time linear speed of winding the warp knitted fabric, the thickness of the warp knitted fabric is gradually increased in the winding process, the speed of V5 is gradually reduced along with the increase of the radius, the linear speed of unwinding the skin-friendly surface layer, the 3D breathable layer and the anti-slip bottom layer is also changed along with the change of V5, the radius of the skin-friendly surface layer, the 3D breathable layer and the anti-slip bottom layer is also changed in the unwinding process, especially, the thickness of the 3D breathable layer is large, the radius change in the unwinding process is also fast, therefore, the system respectively adjusts the unwinding speeds V1, V2 and V3 of the three unwinding motors in real time according to the change of the radius, when three layers of fabrics are compounded, the situation that one of the fabrics is too large or too small in stretching can not occur, the situation that wrinkles or tightness occurs after the fabrics are compounded is prevented, the quality of the fabric compounding is improved, F1 is a first speed compensation coefficient, F1 can adjust the tension of the compounded fabrics, when the actual tension F1 is greater than FO, F1 is greater than 1, V2 and V3 are greater than V5, the actual unwinding speeds of the three fabrics are greater than the actual winding linear speed of the warp-knitted fabrics after the compounding, the tension of the fabrics is reduced, the value of F1 is close to F0, when F1 = FO, V1, V2 and V3 are equal to V5, at the moment, the actual unwinding speeds of the three fabrics are equal to the actual winding linear speed of the warp-knitted fabrics after the compounding, when F0 is greater than F1, F1<1, V2 and V3 are smaller than the actual winding linear speed of the warp-knitted fabrics after the compounding, therefore, the tensioning force of the fabric is improved, the value of F1 is close to F0, and F can adjust the tensioning force of the fabric in real time according to the tensioning force F1, so that the tensioning force of the warp knitting fabric is kept within a standard range in the compounding and conveying processes, the situation that the fabric is wrinkled or broken due to overlarge or undersize tensioning force is prevented, and the quality of products is improved; further, the unfolding roller is beneficial to unfolding and compositing of the skin-friendly surface layer and the anti-slip bottom layer, and improves the quality of fabric compositing; furthermore, the first convex part and the second convex part of the 3D ventilation layer have good application, can be applied to cushions, back cushions, foot pads, mattresses and the like, and can improve the buffering effect, the comfort effect or the anti-skid effect of products; furthermore, the first convex part and the second convex part are directly formed on the 3D ventilation layer, the positions of the two crochets are controlled in real time, the center line is changed, and composite fabric or other processing means are not needed, so that the production efficiency of the product is improved, and the production cost is reduced; further, when the first convex part or the second convex part is formed, the swinging frequency of the guide bars is gradually increased, so that the warp knitting density of the first convex part and the second convex part is gradually increased along the direction of the top end, and the larger the acting force is applied to the first convex part and the second convex part, the larger the deformation is, and the toughness of the first convex part and the second convex part is improved; further, the elastic yarn comprises a modal fiber arranged in the middle part and at least one graphene yarn wound on the modal fiber, the modal fiber is good in elasticity and skin-friendly, and the graphene yarn is good in toughness, so that the skin-friendly surface layer is good in elasticity and toughness and comfortable in skin-friendly.
Drawings
FIG. 1 is a schematic view of the compound mechanism of the present invention;
FIG. 2 is a schematic structural view of a tension detecting mechanism;
FIG. 3 is a schematic view of the deployment mechanism;
FIG. 4 is a partial cross-sectional view of a warp knit fabric;
FIG. 5 is a partial top view of a warp knit fabric;
fig. 6 is a cross-sectional view of an elastic panel.
Detailed Description
The invention will now be further described with reference to the drawings and detailed description.
Referring to fig. 1 to 6, the present embodiment provides a method for producing a composite warp knitted fabric, comprising the following steps:
(1) Manufacturing a skin-friendly surface layer 11: warp knitting by a first warp knitting machine to form a skin-friendly surface layer 11;
the skin-friendly surface layer is made of elastic yarns, and the elastic yarns comprise a modal fiber 111 arranged in the middle and two graphene yarns 112 wound on the modal fiber;
(2) Manufacturing a 3D breathable layer 12: on the second warp knitting machine, the yarns on one or more second guide bars on the left side knit the first surface layer 121, the second guide bars on the center line knit the monofilament layer 122, the yarns on one or more second guide bars on the right side knit the second surface layer 123, the system controls the action of the adjusting part to move the positions of the two second crochets so as to adjust the center line between the two second crochets, the positions of the yarns hooked on the second guide bars by the two second crochets are changed, the positions of the yarns on the first surface layer and the second surface layer are changed, the first convex part 124 is formed on the first surface layer, the second convex part 125 is formed on the second surface layer, and the monofilament length of the monofilament layer is changed according to the change of the distance between the two second crochets;
(3) Manufacturing a non-slip bottom layer 13: warp knitting by a third warp knitting machine to form an anti-slip bottom layer; the anti-slip bottom layer and the skin-friendly surface layer have the same structure;
(4) Compounding: compounding the skin-friendly surface layer 11, the 3D ventilation layer 12 and the anti-slip bottom layer 13 through a compounding mechanism to form the warp knitting fabric 1;
the skin-friendly surface layer, the 3D ventilation layer and the anti-slip bottom layer are respectively rolled through three unreeling drums 21, the compound mechanism comprises three unreeling rollers 22, three unreeling motors respectively driving the unreeling rollers to rotate, one compound roller 23, one reeling roller 24 and a reeling motor driving the reeling rollers to rotate which are sequentially arranged, the unreeling drums are arranged on the unreeling rollers, a radius detection device 25 is respectively arranged on each unreeling roller and each reeling roller, the radius detection device detects real-time radiuses of the skin-friendly surface layer, the 3D ventilation layer and the anti-slip bottom layer, the real-time radiuses are R1, R2 and R3 respectively, the radiuses of the unreeling rollers are RO, the actual linear speeds of the three unreeling drums are V1, V2 and V3, the linear speeds of the system is set to be V4, the radius of the reeling rollers is R4, the real-time radius of the reeling fabrics is R5, the real-time linear speeds of the reeling fabrics of the reeling rollers are V5, V5 = R5/R4, and the system adjusts the real-time radiuses of the warp knitting fabrics of V1, V2 and V3 are 1 = V1, V1 = 0/V1, and V1 = 0/R1/V3; after compounding, the rolled warp knitted fabric passes through a tension detection mechanism 3, the tension force in the warp knitted fabric conveying process is measured to be F1, the standard value of the warp knitted fabric tension force set by a system is F0, f1=1+ (F1-FO)/(n is FO), and n is the speed regulation coefficient set by the system.
The tension detection mechanism 3 comprises two first rotating rollers 31 which are arranged in parallel and level, and a second rotating roller 32 which is arranged between the two first rotating rollers, wherein the two first rotating rollers 31 and the second rotating roller 32 form an isosceles right triangle, the second rotating roller 32 is positioned at a right angle, the second rotating roller 32 is arranged on a rotating seat 33, a pressure detection device 34 is arranged on the rotating seat, the pressure detection device 34 detects the pressure value F2 of the rotating seat, and the tension F1 in the warp knitting fabric conveying process can be obtained by subtracting the gravity of the rotating seat and the second rotating roller from F2 due to the isosceles right triangle.
The composite roller 23 is provided with a plurality of arc grooves corresponding to the first convex parts and the second convex parts, the real-time speed of the composite roller is V6, the actual conveying distance from the skin-friendly surface layer unreeling roller to the composite roller is L1, the actual conveying distance from the 3D ventilation layer unreeling roller to the composite roller is L2, the actual conveying distance from the anti-slip bottom layer unreeling roller to the composite roller is L3, the actual conveying distance of the warp knitted fabric from the composite roller to the wind-up roller is L0, v6=f2×V5, F2 is a second speed compensation coefficient, f2=1+ (L1+L2+L3) (F1-FO)/[ n×FO (L1+L2+L3+L0) ]. Wherein L1, L2 and L3 are usually set as the conveying distance from the fabric to the compound roller when only one layer of fabric is left on the unreeling drum for encircling, and the error value is small and negligible although the distance is in error; l1, L2 and L3 can also be distances when the fabric is fully rolled or semi-rolled, and are specifically set according to the situation.
Before the skin-friendly surface layer and the anti-slip bottom layer are compounded, the skin-friendly surface layer and the anti-slip bottom layer are respectively unfolded through an unfolding mechanism 4, the unfolding mechanism 4 comprises an unfolding roller 41 which is rotatably arranged and an unfolding motor 42 which drives the unfolding roller to rotate, two unfolding strips 43 are symmetrically arranged on the outer surface of the unfolding roller, and the unfolding strips 43 are spirally wound on the outer surface of the unfolding roller.
The 3D ventilation layer may also be manufactured by a fabric production device, which is a well-known device and will not be described here again;
the 3D ventilation layer is also not provided with a first convex part and a second convex part, at the moment, the second warp knitting machine can adopt the same structure as the existing warp knitting machine, the composite roller is not provided with an arc groove, and the real-time speed V6 of the composite roller can not be regulated; the 3D ventilation layer may be provided with only the first convex portion and not the second convex portion, or may be provided with only the second convex portion and not the first convex portion, specifically according to circumstances.
The first convex part and the second convex part of the 3D ventilation layer can also be formed by adopting a composite material, which is a known technical means, but the method has low efficiency and high production cost and is particularly arranged according to the situation.
n is a speed regulation coefficient, n is a positive number, generally n is larger than 1, a numerical value can be set according to the material and the width of the fabric, and the larger n is, the faster the tension is regulated, but the condition of excessive regulation easily occurs, so that the system is unstable and the fluctuation of F1 is larger; if n is smaller, the system is more stable, the fluctuation of F1 is smaller, but the adjusting speed is slow, and the adjusting needs longer time.
When the first convex part or the second convex part is formed, one or two guide bars are added on two sides for warp knitting, so that the reinforced yarns on the first convex part and the second convex part form a third reinforced part, and when the first convex part or the second convex part is not knitted, the crochet hook does not hook the yarns on the added guide bars. The skin-friendly surface layer is provided with a plurality of first reinforcing parts corresponding to the first convex parts, the anti-slip bottom layer is provided with a plurality of second reinforcing parts corresponding to the second convex parts, and the weaving method of the first reinforcing parts and the second reinforcing parts is the same as that of the third reinforcing parts. In this way, the toughness of the first convex part and the second convex part can be enhanced, so that the toughness of the compounded fabric is high, the fabric is not easy to damage, and the method can be omitted, and the fabric is particularly arranged according to the situation.
The first convex part and the second convex part can be arranged up and down symmetrically, when the first convex part or the second convex part is formed, the swinging frequency of the plurality of guide bars is gradually increased, the speeds of the plurality of second crochets are correspondingly increased gradually, and after the second convex part top is reached, the swinging frequency of the plurality of guide bars is gradually reduced and the speeds of the plurality of second crochets are correspondingly reduced in the resetting process of the two second crochets, so that the warp knitting density of the first convex part and the second convex part is gradually increased along the top direction; the first convex part and the second convex part are of long arc surface structures. The first convex part and the second convex part are not arranged vertically symmetrically, the swing frequency of the guide bar and the speed of the second crochet needle are not accelerated to improve the density, and the structure has poor toughness of the fabric and is particularly arranged according to the situation.
Part of warp-knitted fabric is produced by adopting a double-needle bar warp-knitted loom, a plurality of guide bars are arranged on the double-needle bar warp-knitted loom, each guide bar corresponds to one warp-knitted thread, two guide bars or a plurality of guide bars can warp-knitted one layer of fabric, thicker multi-layer fabric can be produced, in the production process, the guide bars on the double-needle bar warp-knitted loom are usually fixed, the crochet hook below the guide bars is manually adjusted by manpower, so that the produced warp-knitted fabric is a planar fabric, the double-needle bar warp-knitted loom is difficult to realize, certain warp-knitted fabrics need to form convex parts or concave parts on the warp-knitted fabric so as to be compounded with other fabrics or materials, thereby forming new composite warp-knitted fabrics, in particular to 3D fabrics formed by the warp-knitted fabrics, the upper layer fabric and the lower layer fabric of the 3D fabric are connected by monofilaments, and the 3D fabric has the characteristic of good air permeability, and the fabric with bulges or grooves is difficult to form on the 3D fabric. Reference is made to chinese patent application No.: 201210230493 this patent provides a two-needle bar warp knitting machine central regulating device, and it includes adjusting handwheel, special-shaped axle, dysmorphism retainer plate, connecting rod, retainer plate, rocker first, eccentric wheel, subsides phase place dish and rocker second, and adjusting handwheel is connected with special-shaped axle, is equipped with dysmorphism retainer plate on the special-shaped axle, and connecting rod one end is connected with dysmorphism retainer plate, and the other end is connected with the retainer plate, and dysmorphism retainer plate is connected with rocker first, and the retainer plate is connected with rocker second, is equipped with eccentric wheel and subsides phase place dish on rocker first and the rocker second. The crochet hook of the warp knitting machine adopts symmetrical adjustment, and the produced warp knitting fabric is planar, so that a convex part or a concave part is difficult to form on the warp knitting fabric. The structures of the first warp knitting machine and the third warp knitting machine of the invention can be the structures of the above patents, and can also adopt other structures of the traditional warp knitting machines, which are well known structures and are not repeated here.
Chinese patent application No.: 201720972695.9 it provides a gear device to adjust to double needle bar warp knitting machine, including frame and symmetry set up two needle bar motion in the frame, needle bar motion includes pivot, eccentric wheel subassembly, connecting rod and is used for installing the guide arm of needle bar, pivot, guide arm rotationally erect in the frame, eccentric wheel subassembly installs in the pivot, the connecting rod is connected eccentric wheel subassembly and guide arm, the tip of pivot is equipped with one and is used for driving pivot pivoted adjustment mechanism, adjustment mechanism includes the screw rod that has the hand wheel, installs the pendulum block on the screw rod and fixes the clamping ring of pivot tip, wear to have the round pin axle on the clamping ring, the round pin axle card is established on the pendulum block. The second warp knitting machine can be improved on the basis of the patent, the adjusting part of the invention is used for replacing the hand wheel of the patent and is connected to the screw rod, and the second warp knitting machine is electrically adjusted through the adjusting part, so that the description is omitted; the second warp knitting machine can also be improved on other traditional warp knitting machines to realize the independent adjustment of the two second crochets, and the description is omitted here.
The adjusting part can also adopt a structure of meshing and connecting a plurality of gears to realize accurate adjustment, and the adjusting part is specifically arranged according to the situation.
The second crochet hook is usually moved one bar position at a time, and is specifically set according to the situation.
The skin-friendly surface layer and the anti-slip bottom layer can also be formed by warp knitting other yarns, and the anti-slip bottom layer is arranged according to the situation.
The tension detection mechanism can also adopt other structures to detect the real-time tension of the fabric, and the tension detection mechanism is specifically arranged according to the situation.
The present invention may employ a PLC or other automatic control system, which is a well-known technique and will not be described in detail herein.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A production method of a composite warp knitted fabric is characterized by comprising the following steps: the method comprises the following steps:
(1) Manufacturing a skin-friendly surface layer: warp knitting by a first warp knitting machine to form a skin-friendly surface layer;
(2) Manufacturing a 3D breathable layer: warp knitting by a second warp knitting machine or a fabric production device to form a 3D breathable layer;
(3) Manufacturing an anti-slip bottom layer: warp knitting by a third warp knitting machine to form an anti-slip bottom layer;
(4) Compounding: compounding the skin-friendly surface layer, the 3D breathable layer and the anti-slip bottom layer through a compounding mechanism to form a warp knitting fabric;
the method comprises the steps that a skin-friendly surface layer, a 3D breathable layer and an anti-slip bottom layer are rolled through three unreeling drums respectively, a compound mechanism comprises three unreeling rollers, three unreeling motors, one compound roller, one reeling roller and a reeling motor, wherein the unreeling rollers, the unreeling motors, the one compound roller, the one reeling roller and the one reeling motor are sequentially arranged, the unreeling drums are arranged on the unreeling rollers, radius detection devices are respectively arranged on each unreeling roller and each reeling roller, the radius detection devices detect real-time radiuses of the skin-friendly surface layer, the 3D breathable layer and the anti-slip bottom layer, the real-time radiuses are R1, R2 and R3 respectively, the radius of the unreeling rollers is RO, the actual linear speeds of the three unreeling rollers are V1, V2 and V3, the linear speeds of the system are V4, the radius of the warp-knitted fabric of the reeling rollers is R5, the real-time linear speeds of the warp-knitted fabric of the reeling rollers are V5, V5 = V4, the real-time radiuses of the warp-knitted fabric of the system is regulated to V1, V2 and V1 = f1 = V5/R1 = 0/R1, and V1 = 0/f 1 = 0 f 1; after compounding, the rolled warp knitted fabric passes through a tension detection mechanism, the tension force in the warp knitted fabric conveying process is measured to be F1, the standard value of the warp knitted fabric tension force set by a system is F0, f1=1+ (F1-FO)/(n is FO), and n is the speed regulating coefficient set by the system.
2. The method for producing a composite warp knitted fabric according to claim 1, wherein: in the method (4), before the skin-friendly surface layer and the anti-slip bottom layer are compounded, the skin-friendly surface layer and the anti-slip bottom layer are respectively unfolded through an unfolding mechanism, the unfolding mechanism comprises an unfolding roller which is rotatably arranged and an unfolding motor which drives the unfolding roller to rotate, unfolding strips are symmetrically arranged on the outer surface of the unfolding roller, and the unfolding strips are spirally wound on the outer surface of the unfolding roller.
3. The method for producing a composite warp knitted fabric according to claim 1, wherein: the top of the 3D ventilation layer is provided with a plurality of long-strip-shaped first convex parts, and the bottom of the 3D ventilation layer is provided with a plurality of long-strip-shaped second convex parts.
4. The method for producing a composite warp knitted fabric according to claim 3, wherein: in method (2), a 3D breathable layer is manufactured: on the second warp knitting machine, the yarns on one or more second guide bars on the left side weave a first surface layer, the second guide bars on the right side weave a monofilament layer, the yarns on one or more second guide bars on the right side weave a second surface layer, a system control adjusting part acts to move the positions of two second crochets so as to adjust the position of the center line between the two second crochets, the positions of the yarns hooked on the second guide bars by the two second crochets are changed, the positions of the yarns on the first surface layer and the second surface layer are changed, a first convex part is formed on the first surface layer, a second convex part is formed on the second surface layer, and the monofilament length of the monofilament layer is changed according to the change of the distance between the two second crochets;
the second warp knitting machine is provided with two adjusting parts which respectively adjust the positions of the two second crochets.
5. The method for producing a composite warp knitted fabric according to claim 4, wherein: the first convex part and the second convex part are arranged symmetrically up and down, when the first convex part or the second convex part is formed, the swing frequency of the guide bars is gradually accelerated, the speeds of the second crochets are correspondingly accelerated gradually, after reaching the top end of the second convex part, the swing frequency of the guide bars is gradually reduced in the resetting process of the two second crochets, and the speeds of the second crochets are correspondingly reduced gradually, so that the warp knitting density of the first convex part and the second convex part is gradually increased along the direction of the top end.
6. The method for producing a composite warp knitted fabric according to claim 5, wherein: the second crochet hook moves one bar position at a time.
7. The method for producing a composite warp knitted fabric according to claim 3, wherein: the first convex part and the second convex part are of long arc surface structures.
8. The method for producing a composite warp knitted fabric according to claim 4, wherein: the adjusting part is a driving motor.
9. The method for producing a composite warp knitted fabric according to claim 1, wherein: the skin-friendly surface layer is made of elastic yarns, and the elastic yarns comprise Modal fibers arranged in the middle and at least one graphene yarn wound on the Modal fibers.
10. The method for producing a composite warp knitted fabric according to claim 9, wherein: the anti-slip bottom layer and the skin-friendly surface layer have the same structure.
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| CN114734691A (en) | 2022-07-12 |
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