CN118516801A - A method for preparing a 3D formed knitted tubular reinforced structure shoe body - Google Patents

Abstract

The invention relates to a preparation method of a 3D formed knitting tubular reinforced structure shoe body, wherein the shoe body is integrally woven and formed by a four-needle bed flat knitting machine by adopting special-shaped tubular knitting, the shoe body is folded along the central axis of a sole and is divided into a left part and a right part which are completely symmetrical, a plurality of tubular structures are arranged on two sides of the shoe body and the sole in a penetrating way, wherein a front needle bed and a rear needle bed are respectively used for knitting the two symmetrical parts of the shoe body, and the front upper needle bed, the front lower needle bed, the rear upper needle bed and the rear lower needle bed are arranged in an X shape and are used for knitting the tubular structures on two sides of the shoe body in sequence. The preparation method is simple and easy to realize, the shoe body after the machine is taken off contains a complete tissue area, no stitching or splicing is needed, the loss of raw materials during cutting is reduced, and the strength of the sole tissue can be enhanced through the sole and the hollow tubular structures penetrating through the two sides.

Description

A method for preparing a 3D formed knitted tubular reinforced structure shoe body

Technical Field

The present invention belongs to the technical field of knitting, and in particular relates to a method for preparing a 3D formed knitted tubular reinforced structure shoe body.

Background Art

The traditional shoe manufacturing process is inefficient and complex, requiring multiple steps such as cutting, sewing, pasting the shoe lining, and adding the midsole, resulting in high production costs. In recent years, knitted uppers and full-formed technologies have gradually emerged. These technologies allow weaving in specific areas, which can directly form the heel and bottom of the shoe, as well as the extension of the sole, realizing the one-piece molding of the heel and sole; in addition, the middle part of the shoe can be extended to both sides to form the tongue.

The patent with publication number CN110353344B mentions a one-piece knitted shoe production process, but the computer flat knitting machine used is a two-needle bed computer flat knitting machine, so when knitting the fully formed shoe body structure, one needle needs to be empty and one needle needs to be knitted every other needle to meet the needs of tubular knitting. The use of this knitting method will result in loose and rough knitting, long floating lines, and easy to snag. The patent with publication number CN108208999A mainly proposes a one-piece knitting process for casual sports shoes. Although the tongue, toe, sole and heel are knitted using a computer flat knitting machine, some of the tissues need to be flipped and folded after the machine is off to facilitate the suturing between the tissues, and the later sewing steps cannot be avoided.

Summary of the invention

The present invention is intended to solve the problems that the one-piece knitted shoes have a loose weaving structure, each tissue is separate and still needs to be sewn off the machine, resulting in cumbersome process steps, and the sewing between the upper and the heels, and between the upper and the rubber sole is not firm and is easily damaged under stress. A method for preparing a 3D formed knitted tubular reinforced structure shoe body is provided.

The present invention adopts the following technical solution: a method for preparing a 3D formed knitted tubular reinforced structure shoe body:

The shoe body is woven in an irregular cylindrical shape by a four-needle-bed flat knitting machine. The shoe body is folded along the central axis of the sole and is divided into two completely symmetrical left and right parts. Several tubular structures are arranged on both sides of the shoe body and through the sole. The front needle bed and the rear needle bed are respectively used to weave the two symmetrical parts of the shoe body, and the front upper needle bed, the front lower needle bed, the rear upper needle bed and the rear lower needle bed are arranged in an X shape for sequentially weaving the tubular structures on both sides of the shoe body.

Furthermore, during the weaving process, the shoe body can be divided into: toe A, sole B, two sides C, tongue and transition area D on both sides, tongue E, tubular structure F, heel G and shoe opening I and wedge-shaped weaving H part.

Furthermore, the tubular structure is hollow, and is provided with openings at the center axis of the sole and at both sides near the tongue for inserting ropes or high-performance fiber bundles.

Furthermore, the weaving direction of the shoe body is from the shoe opening I to the shoe toe A.

Furthermore, the heel area is an alternating plain weave structure, and the weaving method of the heel area is as follows: the first route is two monofilament yarns, which are repeatedly alternating in a floating line state on the front and back sides of the tissue; the second and fourth routes are the main structure yarn A polyester multifilament and hot melt yarn, which are looped one by one and staggered on the left and right to form an alternating plain weave structure; the third and fifth routes are elastic yarn B polyester-spandex coated yarn, which serves as lining yarn, close to the main structure yarn A polyester multifilament and is inserted into the tissue at a 1:1 lining yarn ratio, and circulates continuously through the five-route tissue to finally form the heel area.

Furthermore, the sole area B has stripe-shaped small pores, and the weaving method of the sole area is: the first and fourth routes are the main structure yarn A polyester multifilament combined with hot melt yarn, and the full needles are looped; the second, third, fifth and sixth routes are monofilaments, which are arranged in a staggered manner and looped one by one.

Furthermore, the weaving method of the C areas on both sides is as follows: the 1st and 4th routes are the main structural yarn A polyester multifilament with a small amount of hot-melt yarn, and the remaining routes are all monofilaments, among which the 1st route is full of needles, the 2nd, 3rd, 5th and 6th routes have floating lines every three needles, the 2nd, 3rd and 5th and 6th routes are staggered, and the floating lines of the 2nd and 3rd routes make the coils corresponding to the lower longitudinal rows in the 1st route elongated, and the 4th route is a tucked loop structure spanning three longitudinal rows. After being weaved with the 6-route organization, the whole is moved left and right by two stitch lengths and arranged in a staggered manner, which cooperates with the tucked loop structure of the 4th route to present a large rhombus-shaped multi-porous structure.

Furthermore, the knitting method of the tongue E area is as follows: the organization is based on a rib structure formed by interlacing the front and back longitudinal rows of coils as a basic structure, and two additional longitudinal rows are knitted between adjacent front and back longitudinal rows of coils, wherein 4 rows are looped one at a time and interlaced with each other, and at the same time, the two longitudinal rows of coils are moved to the left and right respectively every 5 rows with the help of the rear upper needle bed, and finally interlaced with the surrounding circular organization to form a longitudinal pick hole structure.

Furthermore, the knitting method of the tubular structure F is as follows: the tubular structure is knitted in sequence: when the front lower needle bed and the rear upper needle bed are knitting, the rear lower needle bed and the front upper needle bed stop knitting until the knitting of the tubular structure on one side is completed; when the rear lower needle bed and the front upper needle bed are knitting, the front lower needle bed and the rear upper needle bed stop knitting to complete the knitting of the tubular structure on the other side.

The present invention utilizes a fully formed design system to carry out zoning design on the upper tissue, and divides the functional areas into: toe, sole, heel and two sides, among which the heel tissue is the thickest, elastic and wear-resistant; the tissues on the two sides are thin, with large pores and good air permeability; the tongue area includes the tongue tissue itself and the transition area between the two side areas, the tongue has high elasticity, and there are holes between the tissues, and the tissues in the transition area are shifted to form small holes for inserting shoelaces, the toe tissue is the same as the sole tissue, which plays a role in protecting the toes, the sole is folded and integrated, and a tubular structure runs through the sole to the two sides, which can improve the tissue strength and reduce the impact on the foot.

The advantages of the present invention are specifically as follows:

(1) The shoe body woven by the weaving method of the present invention has a complete shoe body structure after being taken off the machine. The shoe body is in a 3D folded shape as a whole, including the tongue, toe, heel and a large area of the sole. The various tissues are connected to each other during the weaving process, without any seamless marks, and the tissue transition at the connection is smooth, which reduces the waste of raw materials. The shoe body is light and high-strength. Compared with 2D flat weaving, the sole is folded after the shoe body is taken off the machine. The sole can be directly unfolded and directly integrated with the heel and other tissues without folding or stitching.

(2) In the shoe body woven by the weaving method of the present invention, a plurality of tubular structures are added to the sole and the tissues on both sides during the weaving process, thereby enhancing and balancing the strength of the sole tissue. The tubular structure is hollow and can be penetrated with ropes to help shape or change the size of the shoe body, or with high-performance fiber bundles to enhance the strength of the shoe body.

(3) The present invention adopts a four-needle bed flat knitting machine to knit the shoe body, thereby improving production efficiency and product consistency and reducing raw material waste and labor costs.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a 3D shaped knitted tubular reinforced structure shoe body of the present invention;

FIG2 is a diagram showing the shoe body pattern design and distribution of each region of the 3D formed knitted tubular reinforcement structure of the present invention;

FIG3 is a tissue diagram of the heel G region of the shoe body of the present invention;

FIG4 is a tissue diagram of the sole B region of the shoe body of the present invention;

FIG5 is a tissue diagram of the C region on both sides of the shoe body of the present invention;

FIG6 is a tissue diagram of the tongue E region of the shoe body of the present invention;

FIG7 is a side view of the tubular structure F of the present invention;

FIG. 8 is an enlarged view of the tubular structure F region of the pattern design of the present invention.

DETAILED DESCRIPTION

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the present invention is further described below in conjunction with specific embodiments.

Embodiment 1:

The steps of weaving a 3D shaped knitted tubular reinforcement structure shoe body are as follows:

1. Draw the basic structure diagram of the shoe body, clearly mark the key parts of the shoe body and the structural layout of each part;

2. According to the different density of the woven shoe body, choose a computer flat knitting machine with a suitable machine gauge between 8 and 18 needles per inch, and also choose a suitable number of yarn feeders from 3 to 6 yarn feeders for yarn feeding according to different tissue structures;

3. Use the corresponding four-needle bed full-formation design system to realize the creation of organization, structure and pattern of different areas, as shown in Figure 2;

4. Convert the designed program into a file format recognizable by a computer flat knitting machine, and then import it into the flat knitting machine for production and weaving to obtain a 3D knitted tubular reinforced structure shoe body. Remove the waste yarn from the shoe body that has been taken off the machine, and then put it into a shoe last of appropriate size. Make the shoe body fit the size of the shoe last by stretching it, and finally perform hot steam shaping under appropriate temperature conditions to allow the hot-melt yarns involved in the weaving to fuse and bond, so as to improve the stability of the shoe body and lock its shape.

As shown in Figure 2, the shoe body can be divided into the following areas: toe A, sole B, two sides C, tongue and transition area D on both sides, tongue E, tubular structure F, heel G, shoe opening I and wedge weaving H.

The overall knitting direction is: weaving from the shoe mouth I to the toe A. First, weave the waste yarn to connect the bottom plate to facilitate the later pulling, and at the same time prevent the pulling roller from damaging the shoe body tissue. When weaving to the heel G area, since the tissue junction between the heel and the sole, the two sides, and the transition area is arc-shaped, the length of each horizontal row of the heel is different. It is necessary to use the wedge knitting H that suspends the single-sided knitting, withdraw some needles from work, but still hold the old coils, and let the other part of the knitting needles participate in the knitting after knitting several horizontal rows, so that the knitted tissue gradually tilts, and finally forms the heel G area. Continue to use the wedge knitting H until the tissue is flush with the root of the tongue E. The whole shoe body presents a folded symmetrical shape on the flat knitting machine. The sole B tissue, the two side C tissue, and the tongue E tissue of the shoe body are symmetrically distributed on the left and right sides, and are knitted by the front lower needle bed and the rear lower needle bed respectively. During knitting, each horizontal row has coils belonging to different tissues that are knitted at the same time. Finally, weave to the toe area and close the mouth to form.

Embodiment 2:

Yarn selection: Knitted shoe bodies mainly use 4 types of yarns.

Main structure yarn A: 300-1000D polyester multifilament;

Elastic yarn B: 100D-500D polyester-spandex covered yarn;

Hot-melt yarn C: TPU monofilament with hot-melt temperature between 100-150℃;

Monofilament yarn D: 0.1mm-0.5mm polyester monofilament.

Because the hot-melt yarn is used to fix the main structure after being melted, the hot-melt yarn C and the main structure yarn A share a yarn mouth and weave the same structure.

The specific steps of weaving each organization are as follows:

S10: using yarn mouth No. 1, feeding main structure yarn A to weave the bottom waste yarn;

S20: Then, a yarn mouth No. 2 is used to feed the elastic yarn B to knit the shoe opening I, and the weave is a rib weave to prevent the shoe body from falling apart and the edge from curling;

S30: In the heel G area, the elastic yarn B is fed by the No. 2 yarn mouth, the main structure yarn A and a small amount of hot-melt yarn C are fed by the No. 3 yarn mouth, and the monofilament yarn D is fed by the No. 4 yarn mouth. The overall heel tissue is thick and tight. As shown in Figure 3, in the tissue cycle of this area, the first route is two monofilament yarns D, which are repeatedly alternated on the front and back sides of the tissue, showing a floating line state. The second and fourth routes are the main structure yarn A polyester multifilament with a small amount of hot-melt yarn C, all of which are looped one by one, and the left and right sides are looped. The 3rd and 5th routes are interlaced to form an interlaced plain weave structure. The elastic yarn B is polyester-spandex coated yarn. As the lining yarn, it is close to the main structure yarn A polyester multifilament and inserted into the tissue at a 1:1 lining ratio, which improves the thickness and elasticity of the entire heel tissue. Through the five-way tissue, it circulates continuously to form the heel area. Among them, the elastic yarn B is inserted into the tissue as the lining yarn to increase the thickness and improve the feel. The monofilament yarn D is interspersed on the front and back of the tissue as the floating yarn.

S40: In the area B of the sole, since the starting part intersects with the heel tissue, wedge weaving H is used to weave the inclined tissue until it is flush with the heel of the tongue. The main structure yarn A and a small amount of hot-melt yarn C are fed by the No. 3 yarn mouth, and the monofilament yarn D is fed by the No. 4 yarn mouth. The overall sole tissue is uniform and flat. As shown in Figure 4, the 1st and 4th routes are the main structure yarn A polyester multifilament with a small amount of hot-melt yarn, and both are full-needle loops. The 2nd, 3rd, 5th and 6th routes are monofilament yarn D. Through staggered arrangement and one-by-one looping, the main structure yarn A polyester multifilament below is stretched, and the appearance shows a striped small pore effect;

S50: In the C area on both sides, since the starting part is in an arc shape, wedge weaving H is used to weave the inclined structure until it is flush with the heel of the shoe tongue. The main structure yarn A polyester multifilament and a small amount of hot melt yarn C are fed by yarn mouth No. 3, and the monofilament yarn D is fed by yarn mouth No. 4. As shown in Figure 5, the 1st and 4th routes are the main structure yarn A polyester multifilament with a small amount of hot melt yarn, and the rest of the routes are monofilament yarn D. Among them, the 1st route is full of needles, and the 2nd, 3rd, 5th, and 6th routes all have floating lines every three needles, but the 2nd, 3rd and 5th, 6th routes are staggered. The floating lines of the 2nd and 3rd routes make the coils corresponding to the lower longitudinal rows in the 1st route elongated, and the 4th route is a tuck structure spanning three longitudinal rows. After the six-route organization is woven, the whole is moved left and right by two needle spacings and arranged in a staggered manner. With the tuck structure of the 4th route, some coils in the two side areas are stretched and squeezed, and the appearance is uneven, showing a large rhombus multi-porous effect.

S60: The tongue E area is knitted with the No. 2 yarn mouth and the elastic yarn B. As shown in FIG6 , the basic structure of the weave is a rib weave formed by interlacing the front and back wales. Two additional wales are knitted between adjacent front and back wales, in which four wales are interlaced and interlaced. At the same time, the two wales are moved to the left and right with the help of the rear upper needle bed every five wales, and finally interlaced with the surrounding loop weave to form a longitudinal hole structure. The tongue is knitted with the elastic yarn B;

S70: transition area D between the tongue and the two sides, the overall structure is similar to the sole structure, the content of hot melt yarn is increased, and the overall hardness of this area is higher than that of the surrounding area after heat setting to prevent curling. At the same time, some loops in the area around the tongue are transferred to form holes, which can be used for threading shoelaces. The main structure yarn A and the hot melt yarn C are fed by the No. 3 yarn mouth, and the monofilament yarn D is fed by the No. 4 yarn mouth;

S80: The toe area A has the same structure as the sole structure, and has a striped small pore effect in appearance. The main structure yarn A polyester multifilament and a small amount of hot-melt yarn C are fed by yarn mouth No. 3, and the monofilament yarn D is fed by yarn mouth No. 4;

S90: Tubular F structure, which runs through the sole area and the two side areas, is hollow inside, and is formed integrally with the surrounding tissue. The tissue is the same as the sole tissue. Tubular structures are distributed on both sides of the shoe body, and openings are left at the center axis of the sole and on both sides near the tongue, so that ropes or high-performance fiber bundles can be inserted. Since the knitting of the tubular structure requires the cooperation of the front lower needle bed and the rear upper needle bed at the same time, as shown in Figure 7, and the four needle beds of the four-needle bed computer flat knitting machine are arranged in an "X" shape, when the front lower needle bed and the rear upper needle bed are knitting, the rear lower needle bed and the front upper needle bed need to stop knitting, otherwise the coils will be entangled with each other and there is a risk of needle collision. Therefore, when knitting this structure, the symmetrical tubular structures on the left and right sides of the shoe body are knitted in sequence, as shown in Figure 8. The tubular structures on both sides cannot be knitted at the same time, and the knitting speed is also reduced.

Claims (9)

1. A method for preparing a 3D shaped knitted tubular reinforcing structure shoe body, which is characterized in that:

The shoe body is integrally woven and formed by a four-needle bed flat knitting machine by adopting special-shaped tubular knitting, the shoe body is folded along the central axis of the sole and is divided into a left part and a right part which are completely symmetrical, a plurality of tubular structures are arranged on two sides of the shoe body and the sole in a penetrating way, wherein the front needle bed and the rear needle bed are respectively used for knitting the two symmetrical parts of the shoe body, and the front upper needle bed, the front lower needle bed, the rear upper needle bed and the rear lower needle bed are arranged in an X shape and are used for knitting the tubular structures on two sides of the shoe body in sequence.

2. The method of making a 3D shaped knitted tubular reinforcing structure shoe body of claim 1, wherein: the shoe body can be divided into: toe cap a, sole B, sides C, tongue and transition area D on both sides, tongue E, tubular structure F, heel G and welt I.

3. The method of making a 3D shaped knitted tubular reinforcing structure shoe body of claim 1, wherein: the tubular structure is hollow, and openings which can be used for penetrating ropes or high-performance fiber bundles are formed in the central axis of the sole and the positions, close to the tongues, of the two sides of the tubular structure.

4. The method of making a 3D shaped knitted tubular reinforcing structure shoe body of claim 2, wherein: the braiding direction of the shoe body is from the shoe mouth I to the toe cap A.

5. The method of making a 3D shaped knitted tubular reinforcing structure shoe body of claim 2, wherein: the heel G area is of an alternating plain weave structure, and the weaving method of the heel G area is as follows: the 1 st path is two monofilament yarns, the front and the back of the tissue are repeatedly and alternately in a floating state, the 2 nd path and the 4 th path are main structure yarn A polyester multifilament matched with a thermal fuse, the two paths are all one by one and form a loop, the left and the right are staggered to form a staggered plain structure, the 3 rd path and the 5 th path are elastic yarn B polyester ammonia cladding yarns which are used as lining yarns, the lining yarns are closely abutted against the main structure yarn A polyester multifilament to be lined into the tissue according to the 1:1 lining yarn ratio, and the heel G area is finally formed by continuously circulating through five paths of tissues.

6. The method of making a 3D shaped knitted tubular reinforcing structure shoe body of claim 2, wherein: the structure of the sole B area has a striped small pore effect, and the weaving method of the sole area comprises the following steps: the 1 st and 4 th are main structure yarn A terylene multifilament collocation thermal fuse, full needle looping, the 2 nd, 3 rd, 5 th and 6 th are monofilaments, and the two loops are arranged alternately.

7. The method of making a 3D shaped knitted tubular reinforcing structure shoe body of claim 2, wherein: the weaving method of the C areas on the two sides comprises the following steps: the 1 st path and the 4 th path are main structure yarn A polyester multifilament collocation thermal fuse, the rest paths are monofilaments, the 1 st path is fully knitted, the 2 nd path, the 3 rd path, the 5 th path and the 6 th path are all floating lines which appear at intervals of three needles, the 2 nd path, the 3 rd path, the 5 th path and the 6 th path are staggered, the 2 nd path and the 3 rd path are floating lines, so that the loops corresponding to lower longitudinal lines in the 1 st path are lengthened, the 4 th path is a tuck structure which spans three longitudinal lines, after knitting of 6 paths of tissues, the two needle pitches are moved left and right in a staggered mode, and the tuck structure matched with the 4 th path is large diamond-shaped porous effect.

8. The method of making a 3D shaped knitted tubular reinforcing structure shoe body of claim 2, wherein: the weaving method of the tongue E area comprises the following steps: the structure takes rib weave structure formed by staggered front side stitch lines and back side stitch lines as basic structure, and two stitch lines are additionally woven between adjacent front side stitch lines, wherein 4 paths are formed by one-by-one stitch and staggered with each other, and simultaneously, the two stitch lines are respectively transferred to the left and right by means of a back upper needle bed every 5 paths, and finally, the longitudinal hole picking structure is formed by staggered with surrounding circulation structure.

9. The method of making a 3D shaped knitted tubular reinforcing structure shoe body of claim 2, wherein: the braiding method of the tubular structure F comprises the following steps: the tubular structure is woven in sequence: when the front lower needle bed and the rear upper needle bed are knitted, the rear lower needle bed and the front upper needle bed stop knitting until the knitting of the tubular structure on one side is completed, and when the rear lower needle bed and the front upper needle bed are knitted, the front lower needle bed and the rear upper needle bed stop knitting, and the knitting of the tubular structure on the other side is completed.