CN115559055A - Lining-sandwiched reinforcing rib type warp-knitted spacer fabric and weaving method thereof - Google Patents

Abstract

The application relates to a lining reinforcing rib type warp-knitted spacer fabric and a knitting method thereof, and relates to the field of textile knitting. The method adopts a double-needle-bed warp knitting machine to knit, the double-needle-bed warp knitting machine comprises guide bars GB1, GB2, GB3, GB4, GB5, GB6 and GB7 which are sequentially arranged from a front needle bed to a back needle bed, and the method comprises the following steps: preparing warp feeding, wherein yarns for a surface layer, spacing yarns and reinforcing ribs respectively pass through a yarn guide rod, a yarn dividing reed and a tension rod from respective pan heads in sequence and then are guided to a yarn guide needle of a guide bar group; knitting and looping, wherein GB1, GB2, GB6 and GB7 penetrate into the yarns for the surface layer; GB4 penetrates into the spacing filament; reinforcing ribs are penetrated into GB3 and GB5, and the lining reinforcing rib type warp-knitted spacer fabric is formed by weaving; and (4) drawing and coiling, namely drawing and leading out the lining reinforcing rib type warp-knitted spacer fabric through a drawing and coiling mechanism, and coiling and packaging. The problem that the spacer layer of the existing warp-knitted spacer fabric has poor contribution to the overall mechanical performance is solved, and the service efficiency of the warp-knitted spacer fabric and the rigid/flexible composite material thereof is improved.

Description

Lining reinforcing rib type warp-knitted spacer fabric and weaving method thereof

Technical Field

The application relates to the technical field of textile knitting, in particular to a lining reinforcing rib type warp-knitted spacer fabric and a knitting method thereof.

Background

The warp-knitted spacer fabric is a three-dimensional textile with two opposite surface layers tightly connected by spacer yarns in the middle layer, is produced by a Raschel double-needle bed warp knitting machine, has the characteristics of high production efficiency, strong dimensional stability, air permeability, moisture permeability, compression resistance, resilience, light weight and the like, and is widely used in the field of traditional clothing home textiles such as shoe material bags, clothing mattresses and the like. With the increase of the usage amount of industrial textiles in the fields of civil engineering construction, aerospace, transportation and the like, people have higher and higher performance requirements on the fabric products, for example, resin-based and cement-based rigid composite materials, foam-based and inflatable flexible composite materials which are made into reinforcements all need warp-knitted spacer fabrics with excellent mechanical properties so as to have better service life and protection function in the service process. However, most of the existing commercial warp-knitted spacer fabrics are light and thin products woven by conventional chemical fiber filaments such as terylene, chinlon, polypropylene and the like with smaller fineness, and the performance requirements of high-speed impact resistance, high load resistance and the like cannot be met.

At present, some researchers begin with the surface layer weave structure and yarn raw materials of warp-knitted spacer fabrics to innovate products. Application number CN200910026189.0 'a weaving method of three-dimensional reinforced warp-knitted spaced knitted fabric', which adopts high-performance fiber tows as yarns for lining warp, lining weft and spaced tissues, and can effectively improve the mechanical properties of the fabric such as stretching, shearing and the like. The application number CN202011166913.2 'a method for preparing ultra-large gauge warp-knitted spacer fabric', designs that the warp-knitted spacer fabric with ultra-large thickness can be obtained by using the loop yarn as the connecting yarn of two surface layers of the warp-knitted spacer fabric and washing and drying the connecting yarn, and further expands the application range of the structural material.

In the overall appearance of the fabric, the space layer accounts for the largest proportion, the space volume ratio can reach more than 90%, but the research on the corresponding structure design is less, and the continuous chemical fiber monofilaments are mostly distributed among inclined or crossed arranged continuous chemical fiber monofilaments. When the existing warp-knitted spacer fabric is damaged by a large external force in the out-of-plane direction, the external force dissipation effect is mainly exerted by the upper surface layer and the lower surface layer, and the buffer effect of the thin spacer filaments between the layers is very small. In addition, in products such as concrete, plastic and the like, the reinforcing ribs are common reinforcing materials, the tensile property, the bending property, the impact property and the like of the products can be obviously improved by the reinforcing ribs which are lined in the middle, and the weight of the products cannot be obviously influenced. In view of this, it is highly desirable to provide a warp-knitted spacer fabric having excellent interlaminar reinforcement.

Disclosure of Invention

The invention aims to provide a lining reinforcing rib type warp-knitted spacer fabric and a weaving method thereof, which can further improve the service work efficiency of the warp-knitted spacer fabric and a rigid/flexible composite material thereof so as to solve the problem that the spacer layer of the existing warp-knitted spacer fabric does not contribute well to the overall mechanical property.

In order to achieve the purpose, the technical scheme adopted by the application is as follows:

on the one hand, this application provides a method of weaving of double needle bar warp knitting spacer fabric, the method adopts double needle bar warp knitting machine to weave, double needle bar warp knitting machine includes sley bar group, sley bar group includes sley bar GB1, sley bar GB2, sley bar GB3, sley bar GB4, sley bar GB5, sley bar GB6 and sley bar GB7 that front needle bar to back needle bar direction arranged in proper order, the method includes:

s1, preparing warp feeding, wherein yarns for a surface layer, spacing wires and reinforcing ribs are led to the yarn guide needles of the guide bar group from respective pan heads sequentially through a yarn guide rod, a yarn dividing reed and a tension rod;

s2, knitting to form a loop, wherein the guide bar GB1 and the guide bar GB2 penetrate into the face layer yarn, the face layer yarn and the back cushion yarn are matched with a knitting needle, a sinker and a knocking-over plate on a front needle bed to carry out front-of-needle and back cushion yarn, and a first face layer is knitted; the guide bar GB6 and the guide bar GB7 also penetrate the face layer yarn, and are matched with a knitting needle, a sinker and a knockover plate on a back needle bed to carry out needle front and needle back padding yarns to knit a second face layer tissue; the guide bar GB4 penetrates into the partition filaments, and the first surface layer and the second surface layer are connected to form a three-dimensional fabric through the left-right swing of the guide bar GB4 and the alternate matching of a knitting needle, a sinker and a knocking-over plate of a front needle bed and a rear needle bed; the guide bar GB3 and the guide bar GB5 penetrate into the reinforcing ribs, the small-amplitude left-right swinging and the front needle back shogging are carried out along with the guide bar GB4, finally the guide bar GB4 circularly moves and returns to the original position, and the lining reinforcing rib type warp-knitted spacer fabric is formed by weaving;

and S3, drawing and coiling, wherein the lining reinforcing rib type warp-knitted spacer fabric is drawn out by drawing and coiling through a drawing and coiling mechanism, and is coiled and packaged.

In a possible implementation manner, in the step S1, the yarn dividing reed and the guide bar guide needle, through which the yarn for the surface layer and the spacer thread pass in the let-off process, have the same size specification, and are the high-density yarn dividing reed and the high-density guide bar, and the low-density yarn dividing reed and the low-density guide bar are adopted for the reinforcing rib separately.

In a possible implementation manner, in the step S1, the yarns for the surface layer, the partition yarns and the reinforcing ribs are conveyed on the double-needle bed warp knitting machine from top to bottom, the warp feeding mechanism of the partition yarns is located at the uppermost layer, the warp feeding mechanism of the yarns for the surface layer is located at the lowermost layer, and the warp feeding mechanism of the reinforcing ribs is located between the warp feeding mechanisms of the partition yarns and the warp feeding mechanism of the yarns for the surface layer;

the warp feeding mechanisms of the yarns for the surface layer and the warp feeding mechanisms of the reinforcing ribs are provided with two groups and are symmetrically arranged along the center of the double-needle-bed warp knitting machine.

In a possible implementation manner, in the step S1, the raw material of the yarn for the facing layer is one or more of ordinary chemical fiber multifilament and high-performance fiber.

In a possible implementation manner, in the step S1, the raw material of the spacer yarn is one or more of terylene, chinlon and polypropylene, and the diameter range of the spacer yarn is 0.05-0.5mm.

In a possible implementation manner, in the step S1, the raw material of the reinforcing rib is one or more of polyester, nylon, polypropylene, aramid, polyethylene fiber, glass fiber, carbon fiber, ultra-high molecular weight polyethylene fiber, and basalt fiber, and the diameter range of the reinforcing rib is 0.5-10mm.

In a possible implementation manner, in the step S1, the fineness of the reinforcing ribs is smaller than the empty penetration distance, and the fineness of the reinforcing ribs is smaller than one third of the gauge of the needle bed.

In a possible implementation manner, in the step S2, the spacing layer is formed by arranging the spacing filaments in an N-through N-space arrangement.

In a possible implementation manner, in step S2, the reinforcing ribs are arranged in a 1-in-1 arrangement manner on the yarn guide needles, the needle pitch of the yarn guide needles of the reinforcing ribs is 2N times that of the yarn guide needles of the spacer wires, and the spacer wires and the reinforcing ribs are distributed in a staggered manner.

In another aspect, the present application provides a spacer fabric with a spacer of 5-65mm, which is knitted according to any of the above-mentioned knitting methods of spacer fabric with a spacer of reinforcement type.

The beneficial effect that technical scheme that this application provided brought includes at least:

the application provides a method for weaving of clamp lining reinforcement type warp-knitted spacer fabric, effectively solved the general interlayer structure singleness of current warp-knitted spacer fabric, the not good defect of powerful contribution rate, through leading in two parallel and level light height of arranging strong muscle group to warp direction on current warp-knitted technical basis, make the fabric increase to four planes from original two planes in the thickness direction, avoided thickening aggravation problem that "stromatolite reinforcing" causes among current warp-knitted spacer fabric and the combined material thereof. In addition, the ribs are not bent between layers, and the strength utilization rate is extremely high when the ribs are subjected to the action of external force in the plane direction. Thanks to the integrated forming weaving technology and the staggered empty-penetration arrangement technology, the thicker reinforcing ribs can be fixed with the spacing wires in an interlocking manner, thereby avoiding the slippage of the ribs between layers and ensuring the stability of the whole structure of the fabric. When the fabric is used as a reinforcement to be made into a rigid/flexible composite board, the two rows of reinforcing ribs between the layers can greatly improve the mechanical properties of the product such as stretching, bending, shearing, compression, impact resistance and the like, and further expand the application range of the warp-knitted spacer fabric.

Drawings

The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic flow chart illustrating a method for weaving a spacer fabric of the warp knit spacer type with interlining reinforcement according to an exemplary embodiment of the present application;

FIG. 2 is a schematic representation of a warp run of a method of knitting a spacer warp-knit spacer fabric with interlining reinforcement according to an exemplary embodiment of the present application;

FIG. 3 is a schematic diagram showing a knitting and looping mechanism of a method for knitting a spacer warp-knitted fabric with a reinforcing rib according to an exemplary embodiment of the present application;

FIG. 4 shows a schematic cross-sectional view of a spacer fabric of the warp knit spacer type with reinforcing ribs in accordance with an exemplary embodiment of the present application;

FIG. 5 is a schematic diagram showing the overall construction of a spacer-stiffened rib-type warp-knitted spacer fabric provided in an exemplary embodiment of the present application;

FIG. 6 is a schematic structural diagram of a yarn dividing reed of a weaving method of a lining reinforcing rib type warp-knitted spacer fabric according to an exemplary embodiment of the present application;

FIG. 7 is a schematic representation of the construction of a set of bars for a method of knitting a spacer warp knit of the underwire reinforcement type provided in an exemplary embodiment of the present application;

FIG. 8 is a schematic diagram showing a yarn guide needle of a method for knitting a spacer warp-knitted fabric with a reinforcing rib according to an exemplary embodiment of the present application;

in the figure:

1. coiling; 2. a yarn; 3. a yarn guide bar; 4. splitting a yarn reed; 5. a tension bar; 6. a guide bar group; 7. a sinker; 8. knitting needles; 9. a knock-over plate; 10. lining reinforcing rib type warp-knitted spacer fabric;

21. a face yarn; 22. a spacer wire; 23. reinforcing ribs;

41. high-density yarn dividing reed; 42. low-density yarn dividing reed;

61. high density guide bars; 611. a small-bore yarn guide needle; 62. a low density guide bar; 621. a large-aperture guide needle;

101. a first facing; 102. a spacer layer; 103. a second facing.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The present application will be further described with reference to the following drawings and examples.

First, the terms referred to in the embodiments of the present application will be briefly described:

the double needle bar warp knitting machine utilizes two parallel needle bars to perform looping on all or part of the warp yarns of the guide bar in turn, and is a warp knitting machine type with the widest product range, the largest changing capability and the strongest plasticity of a fabric structure. According to the difference of machine number, knocking-over plate spacing distance, guide bar configuration and the like, a double-faced fabric, a plush fabric, a spacer fabric, a cylindrical fabric and the like can be produced by applying a double-needle bed warp knitting technology, and the product is widely applied to various fields including clothes, home textiles, shoe materials, cases, liners, various industrial nets, automotive interiors, hollow light composite materials and the like. With the rise of the concepts of seamless or less seam forming, three-dimensional structure and the like, the charm of the double-needle bed warp knitting technology is continuously discovered by people, innovative products are continuously emerged, and the unprecedented importance and research and development of the warp knitting technology are brought to people. The double-needle bar warp knitting machine is mainly divided into a Terlicon stripping warp knitting machine and a Raschel warp knitting machine, the Terlicon stripping (tricot) machine has higher speed, fewer guide bars and high machine number, and generally a crochet hook or a groove needle is adopted; the raschel (raschel) machine has low speed, more guide bars and lower machine number, and a latch needle is mostly adopted.

Fig. 1 is a schematic flow chart illustrating a method for knitting a spacer fabric of a spacer reinforcement type using a two-needle-bed warp knitting machine, the two-needle-bed warp knitting machine including a guide bar group including a guide bar GB1, a guide bar GB2, a guide bar GB3, a guide bar GB4, a guide bar GB5, a guide bar GB6, and a guide bar GB7, which are sequentially arranged from a front needle bed to a back needle bed, according to an exemplary embodiment of the present application, the method including:

step S1: and (3) preparing warp feeding, wherein yarns for the surface layer, spacing yarns and reinforcing ribs respectively pass through a yarn guide rod, a yarn dividing reed and a tension rod from respective pan heads in sequence and then are guided to a yarn guide needle of a guide bar group.

In the embodiment of the application, the reinforcing ribs have higher rigidity compared with the yarns and the spacing wires for the surface layer, so that the descending direction is as straight as possible in the let-off process, and the overload deformation of parts such as a yarn guide rod, a yarn dividing reed, a tension rod and the like caused by excessive bending is avoided.

In an alternative embodiment, the yarn dividing reed and the guide bar yarn guide needle which are penetrated by the yarns and the spacing filaments for the surface layer in the let-off process have the same size specification, and are respectively a high-density yarn dividing reed and a high-density guide bar, and the low-density yarn dividing reed and the low-density guide bar are independently adopted as the reinforcing ribs. The high-density yarn dividing reed and the low-density guide bar are originally marked and matched components of a used machine type, the corresponding reed density and the guide bar density (holes/inch) are consistent with a machine number (needle number/inch), the low-density yarn dividing reed and the low-density guide bar belong to components customized for reinforcing ribs, and the corresponding reed density and the guide bar density are 0.5N (N is the number of empty threads in the circulation of a spacer yarn threading unit, and N =1,2,3 \8230 \ 8230; 8230).

In a preferred embodiment, the yarns for the surface layer, the spacing yarns and the reinforcing ribs are conveyed on the double-needle bed warp knitting machine from top to bottom, the warp feeding mechanism of the spacing yarns is positioned at the uppermost layer, the warp feeding mechanism of the yarns for the surface layer is positioned at the lowermost layer, and the warp feeding mechanism of the reinforcing ribs is positioned between the warp feeding mechanisms of the spacing yarns and the warp feeding mechanism of the yarns for the surface layer; the three knitting materials cannot be crossed in the downward conveying process; the let-off mechanisms of the yarns for the surface layer and the let-off mechanisms of the reinforcing ribs are provided with two groups and are symmetrically arranged along the center of the double-needle bed warp knitting machine.

In an alternative embodiment, the yarn for the surface layer is made of one or more of common chemical fiber multifilament (polyester, polypropylene, nylon and the like) and high-performance fiber (aramid, ultra-high molecular weight polyethylene fiber, glass fiber or basalt fiber). The raw material of the spacing filament is one or more of terylene, chinlon and polypropylene or other monofilaments with good rebound resilience, and the diameter range of the spacing filament is 0.05-0.5mm. The raw materials of the reinforcing rib are one or more of terylene, chinlon, polypropylene fiber, aramid fiber, polyethylene fiber, glass fiber, carbon fiber, ultra-high molecular weight polyethylene fiber and basalt fiber, the cross section of the reinforcing rib is approximately circular, and the diameter range of the reinforcing rib is 0.5-10mm.

In a preferred embodiment, the fineness of the reinforcing ribs is smaller than the empty penetration distance, and the fineness of the reinforcing ribs is smaller than one third of the needle bed distance, so that the reinforcing ribs can smoothly penetrate into the spacer layer and the alternate weaving of the spacer wires is not influenced.

In a specific embodiment, please refer to fig. 2, the yarn 2 is unwound from the pan head 1, and is delivered to the guide bar group 6 above the double needle bar warp knitting machine through the yarn guide bar 3, the yarn dividing reed 4 and the tension bar 5, the warp feeding process of three kinds of yarns is illustrated in fig. 2, the warp feeding process of the surface layer yarn 21, the spacing filament 22 and the reinforcing rib 23 is sequentially performed from the left lower direction to the right upper direction, the two yarns cannot be crossed to avoid yarn collision, and the double needle bar warp knitting machine has two needle bars, and the surface layer yarn 21 and the reinforcing rib 23 are respectively provided with a set of warp feeding mechanisms at two sides of the two needle bars.

Step S2: knitting and looping, wherein a guide bar GB1 and a guide bar GB2 penetrate into yarns for the surface layer, and the yarns are padded with the front needle and the back needle in cooperation with a knitting needle, a sinker and a knockover plate on a front needle bed to knit a first surface layer; the guide bar GB6 and the guide bar GB7 also penetrate into the face layer yarn, and the front needle and the back needle are padded in cooperation with the knitting needle, the sinker and the knockover plate on the back needle bed to knit a second face layer tissue; a guide bar GB4 penetrates into a spacer, and the first surface layer and the second surface layer are connected to form a three-dimensional fabric through the left-right swing of the guide bar GB4 and the alternate matching of a knitting needle, a sinker and a knockover plate of the front needle bed and the rear needle bed; the guide bar GB3 and the guide bar GB5 penetrate into the reinforcing ribs, small-amplitude left-right swing and needle front needle back transverse movement are carried out along with the guide bar GB4, finally, the guide bar GB4 circularly moves and then returns to the original position, and the lining reinforcing rib type warp-knitted spacer fabric is formed by weaving.

In this application embodiment, two sley bars of sley bar GB3 and sley bar GB5 only play the effect of the warp direction clamp lining between the layer, all do not participate in the looping movement of surface course, nevertheless do not collide for guaranteeing that the space silk is at two kinds of guide needles of connecting front and back in-process, sley bar GB3 and sley bar GB5 need follow sley bar GB4 and carry out the swing about of small range and the needle back sideslip before the needle, and the swing range need guarantee that the strengthening rib can not collide with the knitting needle on the needle bed when controlling pendulum to the terminal point, finally show still get back to the normal position after the circulation removes along with sley bar GB4, the rib is the state of erectting.

In an alternative embodiment, the first facing layer and the second facing layer may be identical or different in texture, and three main types of warp-knitted spacer fabrics of a single-mesh type, a double-mesh type and a double-close-woven type can be used for the weaving process.

In an alternative embodiment, the spacer filaments form the spacer layer in an N-through-N-void arrangement. The tissue of the spacer layer can be a compound tissue in one or four of I type, V type, X type and IXI type. Alternatively, one or two of the guide bars GB3 and GB5 may be used as the space-layer reinforcing ribs, and the reinforcing ribs of each set are arranged flush in the width direction of the needle bed to constitute the third and fourth planes of the three-dimensional fabric in the thickness direction, respectively.

In a preferred embodiment, the reinforcing ribs are arranged on the yarn guide needles in a 1-in-1-out arrangement mode, the needle pitch of the yarn guide needles of the reinforcing ribs is 2N times that of the yarn guide needles of the spacer wires, and the spacer wires and the reinforcing ribs are distributed in a staggered mode, so that the collision between the spacer wires and the reinforcing ribs in the weaving process is effectively avoided.

In a specific embodiment, referring to fig. 3, 4 and 5, above the looping mechanism, the bar group 6 sets up seven groups of a bar GB1, a bar GB2, a bar GB3, a bar GB4, a bar GB5, a bar GB6 and a bar GB7 in sequence from the front needle bed to the back needle bed direction, wherein the bar GB1, the bar GB2, the bar GB6 and the bar GB7 penetrate the face layer yarn 21, the bar GB4 penetrates the spacer 22, and the bar GB3 and the bar GB5 penetrate the reinforcing rib 23. The knitting needles 8 on the front and rear needle beds complete the knitting of the first surface layer 101, the second surface layer 103 and the spacing layer 102 in the lining reinforcing rib type warp-knitted spacer fabric 10 with the help of the corresponding sinkers 7 and the knockover plate 9 together with the upper guide bar group 6. Wherein, the two surface layers of the fabric adopt a dense weaving surface formed by a chaining structure and a weft insertion structure; the arrangement of the spacing wires 22 adopts a V shape; the reinforcing ribs 23 do not participate in looping movement, only the lining is clamped between two adjacent spaced threads which are penetrated in the air, but in order to ensure that the adjacent spaced guide bars GB4 do not collide with each other when moving forwards, backwards, leftwards and rightwards between needle beds, the movement strokes of the guide bars GB3 and the guide bars GB4 must be independently adjusted, so that the guide bars GB3 can simultaneously do right pendulum and transverse movement when the guide bars GB4 swing rightwards to the front needle bed for looping, the guide bars GB4 can simultaneously do left pendulum and transverse movement when moving leftwards to the back needle bed for looping, but the swing amplitude is smaller, the reinforcing ribs cannot be contacted with a surface layer or even form loops, and the situation is finally expressed as that the lining is approximately vertical between the spaced threads 22.

In the present embodiment, the numbers of the laying yarns and the threading manner of the different guide bars (GB 1-GB 7) are as follows:

GB1:0-0-0-0/5-5-5-5//, compilations;

GB2:1-0-0-0/1-0-0-0//, compilations;

GB3:1-0-2-3/4-5-3-2//,1 empty 1 punch;

GB4:1-0-2-3/4-5-3-2//,1 crosses 1 empty;

GB5:1-0-2-3/4-5-3-2//,1 empty 1 punch;

GB6:0-0-0-1/1-1-1-0//, compilations;

GB7:0-0-5-5/5-5-0-0//, full penetration.

And step S3: and (4) drawing and coiling, namely drawing and leading out the lining reinforcing rib type warp-knitted spacer fabric through a drawing and coiling mechanism, and coiling and packaging.

In the embodiment of the application, in the coiling process, the reinforcing ribs have higher toughness, and the large diameter of the coiling shaft is controlled, so that the coiling size is not good.

For a better understanding of the present application, the selection of the yarn dividing reed, the guide bar and the rib fineness is further described below with reference to the accompanying drawings.

Selection of yarn distribution reed and guide bar:

in order to penetrate reinforcing ribs with fineness which is several times larger than that of common yarns, the arrangement density (reed density and yarn guide needle density) of the yarn dividing reed and the guide bar of the reinforcing ribs is designed to be 0.5N of the arrangement density of corresponding parts of the spacing wires.

In one embodiment, referring to fig. 6 and 7, the yarn guide needles of the spacing filament 22 are threaded in a manner of 1 through 1 empty, and the yarn guide needles of the reinforcing rib 23 are threaded in a manner of 1 through 1 empty. According to the thickness of the yarn 2, the yarn dividing reed 4 and the guide bar group 6 are both set to two sizes. The arrangement density of the high-density yarn dividing reed 41 and the high-density guide bar 61 is the same as the warp knitting machine number, and the face layer yarn 21 and the spacer yarn 22 having a small penetration degree are threaded. The low-density yarn dividing reed 42 and the low-density guide bar 62 are arranged with the density being half of the machine number, and are threaded with reinforcing ribs 23 with larger fineness. Further, five of the guide bars GB1, GB2, GB4, GB6, GB7 are high density guide bars 61, and small diameter guide pins 611 are installed, while two of the guide bars GB3, GB5 are low density guide bars 62, and large diameter guide pins 621 are installed. Referring to fig. 8, in order to ensure that the reinforcing bars 23 with larger strength do not cause deformation of the yarn guide needles when being fed into the knitting mechanism, the cross-sectional thickness of each large-diameter yarn guide needle 621 should be larger than that of the small-diameter yarn guide needle 611.

Selecting the fineness of the reinforcing ribs:

the calculation formulas of the reinforcing rib fineness and the arrangement density on the reinforcing rib machine are respectively shown as a first formula and a second formula:

the formula I is as follows:

the second formula is as follows:

wherein D is the fineness (mm) of the reinforcing rib, P is the arrangement density (root/inch) on the machine of the reinforcing rib, E is the machine number (needle number/inch), k is the fineness index (constant between 0 and 1), N is the number of idle threads in the circulation of the spaced yarn threading unit (for example, 1 is 1, N =1,2 is 2, N =2 is 2), and T is the needle pitch (mm) between two adjacent needles on the needle bed.

Along with the increase of the circulating annular penetration number N of the spacer yarn threading unit, the spacer yarn density of the fabric spacing layer is reduced, but the optional fineness range of the reinforcing ribs is greatly increased, but in order to ensure that the fabric has good structural stability, the spacer yarn density cannot be too low, so that N is preferably 1-3.

The common machine numbers of the existing double-needle bed warp knitting machine are E6 to E24, the full-width rib padding or the 1-part and 1-part hollow rib padding warp knitting spacer fabric can be knitted according to the actual rebound resilience and the reinforcement requirements of products, the warp threading rate of the reinforcing rib is 50% in the full-width rib padding process, and if the partial rib padding process is selected, the warp threading rate is more than 50%.

In order to ensure that the reinforcing rib can smoothly pass through the low-density yarn guide needle, the fineness is selected so as to ensure that the fineness index k is less than 1, namely the maximum value of the section width of the rib is less than the needle pitch, but the reinforcing effect of the excessively thin rib is poor, and the k is preferably in the range of 0.30-0.95. If a 12-needle double-needle bed warp knitting machine is selected to knit 2-through 2-empty reinforcing rib type spacer fabric, the arrangement density of the reinforcing ribs on the machine can be calculated to be 3 ribs/inch according to the formula, the maximum selectable fineness can reach 4.0mm, and the space between the needle beds is larger than 12mm when the maximum fineness is selected. If 1-through 1-empty reinforcing rib type spacer fabric knitted by an 18-needle double-needle bed warp knitting machine is selected, the arrangement density of reinforcing ribs on the machine can be calculated to be 9 pieces/inch according to the formula, the maximum value of the selectable fineness is 1.3mm, and the needle bed gauge distance is larger than 3.9mm when the maximum fineness is selected.

In addition, the present application also provides a spacer fabric with reinforcing ribs knitted according to the method for knitting the spacer fabric with reinforcing ribs, please refer to fig. 4 and 5, wherein X represents the fabric transverse direction, i.e. the needle bed transverse direction, Y represents the fabric warp direction, i.e. the needle bed longitudinal direction, in XYZ coordinates, Z represents the fabric thickness direction, i.e. the front and back needle bed alignment direction. In order to show the alignment relationship between the stitch arrangement density of the surface layer in the fabric cross section and the spacing wires 22 and the reinforcing ribs 23, the lower side of fig. 4 is provided with a local number (numbers 1-9) representing the knitting needle 8 on the needle bed. The spacing threads 22 in the fabric spacing layer 102 are arranged in a 1-through 1-empty V shape (1/3/5/7/9) in the transverse direction of the fabric, the reinforcing ribs 23 are clamped and lined at the unused empty needle positions (0/2/4/6/8) of the spacing threads 22 in a 1-empty 1-through mode, and the left side and the right side of each reinforcing rib 23 are provided with the spacing threads 22 which are inclined in a crossed mode for interlocking so as to prevent the ribs from sliding. The distance between the first surface layer 101 and the second surface layer 103 of the spacer fabric is 5mm-65mm.

To sum up, the utility model provides a weaving method of clamp lining strengthening rib type warp-knitted spacer fabric has effectively solved the general interlayer structure singleness of current warp-knitted spacer fabric, the not good defect of powerful contribution rate, introduces the high strong muscle group of forcing of light that two parallel and level were arranged through the warp direction on current warp-knitted technical basis, makes the fabric increase to four planes from original two planes in thickness direction, has avoidd the thickening aggravated problem that "stromatolite reinforcing" caused in current warp-knitted spacer fabric and the combined material thereof. In addition, the ribs are not bent between layers, and the strength utilization rate is extremely high when the ribs are subjected to the action of external force in the plane direction. Thanks to the integrated forming weaving technology and the staggered empty-penetration arrangement technology, the thicker reinforcing ribs can be fixed with the spacing wires in an interlocking manner, thereby avoiding the slippage of the ribs between layers and ensuring the stability of the whole structure of the fabric. When the fabric is used as a reinforcement to be made into a rigid/flexible composite board, the mechanical properties of the product such as stretching, bending, shearing, compression, impact resistance and the like can be greatly improved by two rows of reinforcing ribs between layers, and the application range of the warp-knitted spacer fabric is further expanded.

The above is only the preferred embodiment of the present application, and it should be noted that: it will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the principles of the application, and such modifications and enhancements are intended to be included within the scope of the application.

Claims (10)

1. The utility model provides a method of knitting of clamp lining rib reinforcement type warp knitting spacer fabric, its characterized in that, the method adopts two needle bar warp knitting machine to weave, two needle bar warp knitting machine includes sley bar group, sley bar group includes sley bar GB1, sley bar GB2, sley bar GB3, sley bar GB4, sley bar GB5, sley bar GB6 and sley bar GB7 that front needle bed to back needle bed direction arranged in proper order, the method includes:

s1, preparing warp feeding, wherein yarns for a surface layer, spacing wires and reinforcing ribs are led to the yarn guide needles of the guide bar group from respective pan heads sequentially through a yarn guide rod, a yarn dividing reed and a tension rod;

s2, knitting to form a loop, wherein the guide bar GB1 and the guide bar GB2 penetrate into the face layer yarn, the face layer yarn and the back cushion yarn are matched with a knitting needle, a sinker and a knocking-over plate on a front needle bed to carry out front-of-needle and back cushion yarn, and a first face layer is knitted; the guide bar GB6 and the guide bar GB7 also penetrate the face layer yarn, are matched with a knitting needle, a sinker and a knockover plate on a back needle bed to carry out needle front and needle back padding yarns, and knit a second face layer tissue; the guide bar GB4 penetrates into the partition filaments, and the first surface layer and the second surface layer are connected to form a three-dimensional fabric through the left-right swing of the guide bar GB4 and the alternate matching of a knitting needle, a sinker and a knocking-over plate of a front needle bed and a rear needle bed; the guide bar GB3 and the guide bar GB5 penetrate into the reinforcing ribs, the small-amplitude left-right swing and the front needle back shogging are carried out along with the guide bar GB4, finally the guide bar GB4 circularly moves and then returns to the original position, and lining reinforcing rib type warp-knitted spacer fabrics are woven;

and S3, drawing and coiling, wherein the lining reinforcing rib type warp-knitted spacer fabric is drawn out through drawing and coiling by a drawing and coiling mechanism and is packaged in a coil.

2. The method of claim 1, wherein in step S1, the yarn for the face layer and the spacer thread pass through the same size specification as the yarn dividing reed and the guide bar yarn guide needle, and the yarn for the face layer and the spacer thread are high density yarn dividing reed and high density guide bar, and the reinforcing bar is low density yarn dividing reed and low density guide bar.

3. The method of claim 1, wherein in step S1, the face layer yarn, the spacer and the reinforcing rib are fed from top to bottom on the double needle bed warp knitting machine, the warp feeding mechanism for the spacer is located at the uppermost layer, the warp feeding mechanism for the face layer yarn is located at the lowermost layer, and the warp feeding mechanism for the reinforcing rib is located between the warp feeding mechanism for the spacer and the warp feeding mechanism for the face layer yarn;

the warp feeding mechanisms of the yarns for the surface layer and the warp feeding mechanisms of the reinforcing ribs are provided with two groups and are symmetrically arranged along the center of the double-needle-bed warp knitting machine.

4. The method of claim 1, wherein in step S1, the yarn for the top layer is made of one or more of ordinary chemical fiber multifilament and high performance fiber.

5. The method for weaving lining reinforcing rib type warp-knitted spacer fabric according to claim 1, wherein in the step S1, the spacer yarn is made of one or more of terylene, chinlon and polypropylene, and the diameter range of the spacer yarn is 0.05-0.5mm.

6. The method for knitting the lining reinforcing rib type warp-knitted spacer fabric according to claim 1, wherein in the step S1, the reinforcing rib is made of one or more of polyester, nylon, polypropylene, aramid, polyethylene fibers, glass fibers, carbon fibers, ultra-high molecular weight polyethylene fibers and basalt fibers, and the diameter of the reinforcing rib ranges from 0.5mm to 10mm.

7. The method of claim 1, wherein the fineness of the reinforcing ribs is smaller than the empty through space and the fineness of the reinforcing ribs is smaller than one third of the needle bed space in the step S1.

8. The method of claim 1, wherein in step S2, the spacer filaments form a spacer layer in an arrangement of N-holes by N-holes.

9. The method of claim 1, wherein in step S2, the ribs are arranged in a 1-over-1 arrangement on a needle guide, the needle pitch of the needle guide of the ribs is 2N times the needle pitch of the needle guide of the spacer, and the spacer and the ribs are distributed in a staggered manner.

10. A lining reinforcing rib type warp-knitted spacer fabric knitted by the method for knitting the lining reinforcing rib type warp-knitted spacer fabric according to any one of claims 1 to 9, wherein the gauge of the lining reinforcing rib type warp-knitted spacer fabric is 5 to 65mm.

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