阅读说明：本技术 一种变隔距纬编间隔织物及其制备方法 (Variable-gauge weft-knitted spacer fabric and preparation method thereof ) 是由 马丕波 徐婉丽 蒋高明 缪旭红 丛洪莲 万爱兰 于 2019-10-29 设计创作，主要内容包括：本发明实施例提供一种变隔距纬编间隔织物及其制备方法,其中,所述方法包括：确定第一表面的曲面区域,采用变密度工艺及第一收放针工艺在第一针床上编织所述曲面区域；在第二针床上采用第二收放针工艺编织第二表面；其中,第二收放针工艺与所述第一收放针工艺匹配；采用间隔纱,依照所述第一表面上的弯曲弧度将所述第一表面与第二表面缝和。通过本方案,可在横机上直接编织出全成型的纬编间隔织物,无需分片编织及单独缝和,有效保障了制备纬编针织物的效率；除此之外,本方案可制备的纬编间隔织物,可为两表面之间的隔距不唯一的变隔距纬编间隔织物,有效弥补了现有技术方案中缺少一种制备效率高且可制备变隔距纬编间隔织物的技术方案的技术问题。(The embodiment of the invention provides a variable-gauge weft-knitted spacer fabric and a preparation method thereof, wherein the method comprises the following steps: determining a curved surface area of the first surface, and knitting the curved surface area on a first needle bed by adopting a variable density process and a first narrowing and widening process; knitting a second surface on a second needle bed by adopting a second narrowing and widening process; the second needle retracting and releasing process is matched with the first needle retracting and releasing process; stitching the first surface to the second surface in accordance with the curvature of the first surface using spacer yarns. By the scheme, the fully-formed weft-knitted spacer fabric can be directly knitted on a flat knitting machine, piece-by-piece knitting and separate sewing are not needed, and the efficiency of preparing the weft-knitted fabric is effectively guaranteed; in addition, the weft-knitted spacer fabric which can be prepared by the scheme can be a variable-gauge weft-knitted spacer fabric with a non-unique gauge between two surfaces, and the technical problem that the technical scheme which is high in preparation efficiency and can be used for preparing the variable-gauge weft-knitted spacer fabric is lacked in the prior art is effectively solved.)

1. A method for preparing a variable-gauge weft-knitted spacer fabric is characterized by comprising the following steps of:

determining a curved surface area of the first surface, and knitting the curved surface area on a first needle bed by adopting a variable density process and a first narrowing and widening process;

knitting a second surface on a second needle bed by adopting a second narrowing and widening process; the second needle retracting and releasing process is matched with the first needle retracting and releasing process;

stitching the first surface to the second surface in accordance with the curvature of the first surface using spacer yarns.

2. The method of claim 1, wherein said knitting said curved surface region on a first needle bed using a variable density process and a first pick and place process comprises:

presetting the shape of the outline of the bent area, and knitting the bent area with the preset shape of the outline by adopting a first narrowing and widening process;

and weaving the area of the convex part in the curved surface area by adopting a variable density weaving process.

3. The method of claim 2, wherein said knitting a region of raised portions of said curved surface region using a variable density knitting process comprises:

if the height of the bulge of the curved surface subregion is greater than that of the bulge of the previous curved surface subregion, the fabric density is reduced;

if the height of the bulge of the curved surface subregion is smaller than that of the bulge of the previous curved surface subregion, the fabric density is increased;

the curved surface area comprises a preset number of curved surface sub-areas.

4. The method of claim 2, wherein stitching the first surface to the second surface in accordance with the curvature of the first surface using a spacer yarn comprises:

if the bulges on the first surface are increased, stitching the bulge-increased areas on the first surface with the corresponding areas on the second surface in a mode of increasing the yarn feeding speed;

if the bulge of the first surface is reduced, the bulge reduced area of the first surface is sewn with the corresponding area on the second surface in a mode of reducing the yarn feeding speed.

5. The method according to any of claims 1-4, wherein the stiffness of the spacer yarns meets a predetermined requirement.

6. The method according to claim 1, wherein the first needle bed is a front needle bed and the second needle bed is a back needle bed.

7. The method of claim 1, further comprising:

knitting a planar region of the first surface on a first needle bed.

8. The method of claim 7,

the knitting a planar region of the first surface on a first needle bed, comprising:

and arranging a first working needle at a preset position on a first needle bed, and knitting the plane area of the first surface by adopting the first working needle.

9. The method of claim 8, wherein said knitting said curved surface area on a first needle bed using a variable density process and a first pick and place process comprises:

taking the needle at the preset position of the first needle bed as a second working needle, and controlling the second working needle to weave the curved surface area;

wherein the number of the second working needles is not more than that of the first working needles.

10. A variable gauge weft-knitted spacer fabric, comprising:

a first surface, a second surface and a spacer yarn layer;

wherein the first surface comprises a curved surface region and the spacer yarn layer is used for stitching the first surface with the second surface.

Technical Field

The invention relates to the technical field of weaving methods and woven fabrics, in particular to a gauge-variable weft-knitted spacer fabric and a preparation method thereof.

Background

Weft knitted fabrics are excellent in extensibility and elasticity and are often used for clothing materials, but in recent years, industrial textiles account for an ever-increasing proportion in the entire textile industry, such as automotive textiles, aerospace textiles, basic textile products, infrastructure textile products and the like.

With the wider and wider application of the weft knitted fabric, the consumption of the weft knitted fabric is larger and larger, and the traditional preparation method of the weft knitted fabric is to respectively weave or artificially weave each knitting piece forming the weft knitted fabric on a machine, and then correspondingly sew a plurality of knitting pieces which are woven in advance together through the machine or manually; since a plurality of knitted pieces constituting a weft knitted fabric need to be knitted individually and a plurality of knitted pieces need to be sewn individually, the work load is undoubtedly large, and the production efficiency of the weft knitted fabric is low.

In addition, the prior art can only weave weft-knitted fabrics with consistent gauge between the front surface and the back surface, and the technology and the fabrics of the variable gauge weft-knitted gauge fabric with inconsistent gauge between the front surface and the back surface are blank.

In conclusion, the technical scheme which has high preparation efficiency and can prepare the variable-gauge weft-knitted spacer fabric is lacked in the prior art.

Disclosure of Invention

The invention provides a variable-gauge weft-knitted spacer fabric and a preparation method thereof, and aims to solve the technical problem that a technical scheme which is high in preparation efficiency and can be used for preparing the variable-gauge weft-knitted spacer fabric is lacked in the prior art.

In a first aspect, a method for preparing a variable-gauge weft-knitted spacer fabric according to an embodiment of the invention includes:

determining a curved surface area of the first surface, and knitting the curved surface area on a first needle bed by adopting a variable density process and a first narrowing and widening process;

knitting a second surface on a second needle bed by adopting a second narrowing and widening process; the second needle retracting and releasing process is matched with the first needle retracting and releasing process;

stitching the first surface to the second surface in accordance with the curvature of the first surface using spacer yarns.

In one embodiment, the knitting the curved surface region on the first needle bed by using a variable density process and a first narrowing and widening process includes:

presetting the shape of the outline of the bent area, and knitting the bent area with the preset shape of the outline by adopting a first narrowing and widening process;

and weaving the area of the convex part in the curved surface area by adopting a variable density weaving process.

In one embodiment, the knitting the area of the convex part in the curved surface area by using a variable density knitting process includes:

if the height of the bulge of the curved surface subregion is greater than that of the bulge of the previous curved surface subregion, the fabric density is reduced;

if the height of the bulge of the curved surface subregion is smaller than that of the bulge of the previous curved surface subregion, the fabric density is increased;

the curved surface area comprises a preset number of curved surface sub-areas.

In one embodiment, said stitching said first surface to said second surface according to a curvature on said first surface with a spacer yarn comprises:

if the bulges on the first surface are increased, stitching the bulge-increased areas on the first surface with the corresponding areas on the second surface in a mode of increasing the yarn feeding speed;

if the bulge of the first surface is reduced, the bulge reduced area of the first surface is sewn with the corresponding area on the second surface in a mode of reducing the yarn feeding speed.

In one embodiment, the stiffness of the spacer yarns meets a predetermined requirement.

In one embodiment, the first needle bed is a front needle bed and the second needle bed is a back needle bed.

In one embodiment, the method further comprises:

knitting a planar region of the first surface on a first needle bed.

In one embodiment, said knitting a planar region of said first surface on a first needle bed comprises:

and arranging a first working needle at a preset position on a first needle bed, and knitting the plane area of the first surface by adopting the first working needle.

In one embodiment, the knitting the curved surface region on the first needle bed by using a variable density process and a first narrowing and widening process includes:

taking the needle at the preset position of the first needle bed as a second working needle, and controlling the second working needle to weave the curved surface area;

wherein the number of the second working needles is not more than that of the first working needles.

In a second aspect, there is provided, in accordance with an embodiment of the present invention, a variable gauge weft-knitted spacer fabric, comprising:

a first surface, a second surface and a spacer yarn layer;

wherein the first surface comprises a curved surface region and the spacer yarn layer is used for stitching the first surface with the second surface.

The embodiment of the invention provides a variable-gauge weft-knitted spacer fabric and a preparation method thereof, which can be used for knitting a curved surface area of a first surface by adopting a first narrowing and widening process and a variable-density process on a first needle bed of a flat knitting machine, knitting a second surface by adopting a second narrowing and widening process on a second needle bed, and then sewing the first surface and the second surface by adopting spacer yarns according to the bending radian on the first surface. The method provided by the scheme can directly weave the fully-formed weft-knitted spacer fabric on a flat knitting machine without the need of split knitting and separate sewing, thereby effectively ensuring the efficiency of weft-knitted fabric preparation; in addition, the weft-knitted spacer fabric which can be prepared by the scheme can be a variable-gauge weft-knitted spacer fabric with a non-unique gauge between two surfaces, and the technical problem that the technical scheme which is high in preparation efficiency and can be used for preparing the variable-gauge weft-knitted spacer fabric is lacked in the prior art is effectively solved.

Drawings

The accompanying drawings are provided to illustrate the present invention, and it is to be understood that the following description of the specific embodiments is illustrative of some embodiments of the invention and is not to be construed as limiting the invention. In the drawings:

FIG. 1 is a flow chart of a method for manufacturing a variable gauge weft-knitted spacer fabric according to an embodiment of the present invention;

FIG. 2 is a flow chart of a method for preparing a variable gauge weft-knitted spacer fabric according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a variable-gauge weft-knitted spacer fabric according to an embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all 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 invention.

The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Referring to fig. 1, an embodiment of the present invention provides a method for preparing a variable-gauge weft-knitted spacer fabric, which mainly includes the following steps:

step S102, determining a curved surface area of the first surface, and knitting the curved surface area on a first needle bed by adopting a variable density process and a first narrowing and widening process;

in the embodiment of the present invention, referring to fig. 2, the step S102 includes:

and S1021, presetting the shape of the outline of the bent area, and knitting the bent area with the preset shape of the outline by adopting a first narrowing-widening and widening process.

And step S1022, weaving the area of the convex part in the curved surface area by adopting a variable density weaving process.

In the embodiment of the invention, when the variable-gauge weft-knitted spacer fabric is knitted on a flat knitting machine, the shape of the outline of the curved surface area on the first surface needs to be set; then, knitting a bending area with a preset outline shape on a first needle bed by adopting a first narrowing and widening process on a flat knitting machine; and finally, determining technological parameters of a variable density weaving process to be adopted according to parameters such as radian, bending direction and the like of the curved surface area on the first surface, and weaving the area of the convex part in the bending area. It is pointed out that the curved surface region may be divided into a plurality of small curved surface sub-regions, and then parameters of the knitting density to be adopted are determined according to the bending radian and the bending direction of each curved sub-region, specifically referring to fig. 2, in the embodiment of the present invention, the weaving the region of the convex portion in the curved surface region by using the variable density knitting process includes: if the height of the bulge of the curved surface subregion is greater than that of the bulge of the previous curved surface subregion, the fabric density is reduced; if the height of the bulge of the curved surface subregion is smaller than that of the bulge of the previous curved surface subregion, the fabric density is improved; the curved surface area comprises a preset number of curved surface sub-areas. As regards the specific amount of increase or decrease in the fabric density, it depends on the rate of change of the height of the protuberances of the curved subareas; in addition, the number of the bending sub-regions included in the bending region may also depend on the user's requirement, and is not particularly limited herein.

Step S104, knitting a second surface on a second needle bed by adopting a second narrowing or widening process; the second needle retracting and releasing process is matched with the first needle retracting and releasing process;

in the embodiment of the present invention, the woven variable-gauge weft-knitted spacer fabric is a woven fabric including two surfaces (may be front and back surfaces), and the first surface including the curved surface region may be prepared through step S102; the second surface can be a plane surface and can be knitted on a second needle bed of the flat knitting machine, and although the second surface is a plane surface, the area of the first retracting and releasing process is adopted when the first surface is knitted in order to be matched with the outline of the first surface, and the second surface also adopts a corresponding second retracting and releasing process, so that the first surface and the second surface can be sewn well and a cushion can be provided for the follow-up process. Therefore, the first needle bed and the second needle bed of the flat knitting machine can be fully utilized, and the high efficiency of knitting can be effectively ensured.

In an embodiment of the invention, the first needle bed may be a front needle bed of a flat knitting machine, and correspondingly, the second needle bed is a back needle bed of the flat knitting machine. It is noted that the first needle bed is a front needle bed and the second needle bed is a back needle bed, which is only a preferred embodiment of the present invention, and is not a specific limitation that the first needle bed, the second needle bed is a front needle bed or a back needle bed.

And S106, sewing the first surface and the second surface according to the curvature of the first surface by adopting spacing yarns.

In the embodiment of the invention, after the first surface is knitted on the first needle bed and the second surface is knitted on the second needle bed, another sand nozzle is adopted for raising the needle on the flat knitting machine, a looping mode is adopted, and a spacing yarn is adopted to stitch the first surface and the second surface according to the bending radian on the first surface.

It is noted that the stiffness of the spacer yarn satisfies a predetermined requirement, specifically, the spacer yarn is a woven spacer yarn having a predetermined requirement, and specific parameters of the weaving property and the weaving property can be selected according to actual materials of the first surface and the second surface, so as to use the shape of the curved surface area capable of supporting the first surface well as a reference. In this way, the bending region of the first surface can be supported well by the spacer yarns, so that the shape of the bending region is maintained.

In the embodiment of the present invention, in step S106, stitching the first surface and the second surface according to the curvature of the first surface by using a spacer yarn includes:

s1061, if the protrusion of the first surface is increased, stitching the protrusion region of the first surface with the corresponding region on the second surface in a mode of increasing the yarn feeding rate;

and S1062, if the protrusions of the first surface are reduced, stitching the concave regions of the first surface with the corresponding regions of the second surface in a manner of reducing the yarn feeding rate.

In the embodiment of the invention, when the protrusion of the first surface is increased, the yarn feeding rate is increased, so that the yarn feeding amount in the same time is increased, and the yarn feeding time is not changed, therefore, the length of the spacing yarn between the first surface and the second surface is increased, and the sewing of the increased protrusion of the first surface and the corresponding region of the second surface can be well adapted.

In an embodiment of the present invention, the method further comprises:

step S103, knitting a planar area of the first surface on a first needle bed.

In the embodiment of the present invention, if the first surface includes a planar area while including a curved area, the planar area is preferably knitted on the first needle bed, and as for the order of knitting the planar area and the curved area on the first needle bed, the order may be determined according to the positional relationship between the curved area and the planar area, and knitting is preferably selected to start from an area located at one edge.

In an embodiment of the present invention, said knitting a planar area of said first surface on a first needle bed comprises:

and arranging a first working needle at a preset position on a first needle bed, and knitting the plane area of the first surface by adopting the first working needle.

In this embodiment of the present invention, in step S102, the knitting the curved surface region on the first needle bed by using the variable density process and the first narrowing and widening process includes:

taking a knitting needle at a preset position of a first needle bed as a second working needle, and controlling the second working needle to knit the curved surface area;

wherein the number of the second working needles is not more than that of the first working needles.

In the embodiment of the invention, the number of the second working needles is not more than that of the first working needles, and the number of the working needles is more than that required for weaving the curved surface area with the same width than that of the flat surface area, so that the arrangement can ensure that the working needles on the needle bed can weave the curved surface area sufficiently.

As follows, a specific example is illustrated:

weaving a variable-gauge weft-knitted spacer fabric by a weft-knitted full-forming flat knitting machine, weaving a first surface and a second surface, and weaving a planar area by adopting the density of 30 wales/5 cm and a curved area by adopting the density of 20 wales/5 cm when weaving the first surface; while knitting was performed with a density of 30 wales/5 cm when knitting the second surface. The first and second surfaces are then stitched together by spacer yarns that are only tuck-knit.

By the method provided by the embodiment of the invention, the fully-formed weft-knitted spacer fabric can be directly knitted on a flat knitting machine without piecemeal knitting and separate sewing, so that the efficiency of preparing the weft-knitted fabric is effectively guaranteed; in addition, the weft-knitted spacer fabric prepared by the scheme can be a variable-gauge weft-knitted spacer fabric with a non-unique gauge between two surfaces (a first surface and a second surface), and the defect that the technical scheme for preparing the variable-gauge weft-knitted spacer fabric is lacked in the prior art is effectively overcome.

Referring to fig. 3, the present invention also provides a variable gauge weft-knitted spacer fabric, comprising: a first surface 31, a second surface 32 and a spacer yarn layer 33;

wherein the first surface 31 includes a curved surface region 311 and the spacer yarn layer 33 is used to stitch the first surface 31 to the second surface 32.

It can be seen that the present embodiment is an embodiment of a product manufactured by the method described in the above embodiment of the method, and therefore, the techniques, parameters, and the like described in the above embodiment of the method are similarly applicable to the embodiment of the product, and are not described herein again.

The variable-gauge weft-knitted spacer fabric provided by the embodiment of the invention comprises a first surface and a second surface, wherein at least one of the first surface and the second surface comprises a surface with a curved surface area, for example, the first surface comprises the surface with the curved surface area, then the two surfaces are sewn together through a spacer yarn to form a double-layer spacer fabric, and the curved surface area based on the first surface can be supported through the spacer yarn, so that the formed variable-gauge weft-knitted spacer fabric is the variable-gauge weft-knitted spacer fabric with the non-unique gauge between the two surfaces. Therefore, the scheme effectively makes up the problem that the technical blank of the variable-gauge weft-knitted spacer fabric in the existing scheme is lacked.

It should be noted that, in the embodiments of the present invention, the term "connected" may be a direct connection or an indirect connection. The connection can be through a wire or other connection structure, such as a hose. The present solution is not particularly limited.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

While the invention has been 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.