WO2020223992A1

WO2020223992A1 - Preparation method for flyknit 3d mold-pressing upper

Info

Publication number: WO2020223992A1
Application number: PCT/CN2019/086874
Authority: WO
Inventors: 蒋荣军
Original assignee: 蒋荣军
Priority date: 2019-05-08
Filing date: 2019-05-14
Publication date: 2020-11-12
Also published as: CN110101162A

Abstract

Disclosed is a preparation method for a flyknit 3D mold-pressing upper, the preparation method comprising the following steps: raw material selection; upper design; flyknit forming: obtaining a pocket-type knitted semi-finished product by knitting; lining mold-pressing: carrying out flat pressing combination and 3D mold hot press molding on an internal filler to obtain an elastic lining; lining loading: tucking the elastic lining into the knitted semi-finished product to obtain a three-dimensional rough blank of the upper; and secondary forming: putting the three-dimensional rough blank into a hot press for mold pressing to obtain a finished upper, such that the combination of the knitted upper and a three-dimensional forming process can be achieved, various knitted patterns can be customized to carry out personalization according to requirements, the cost is low to achieve a price advantage, and compared with an upper produced using the traditional process, the present invention has the characteristics of being more flexible, more comfortable, more breathable and better in shape and three dimensional appeal, achieving diversity in appearances and patterns, and being cost-saving.

Description

Method for preparing flying woven 3D molded shoe upper

Technical field

The invention relates to the technical field of shoe upper manufacturing, and more specifically, to a method for preparing flying woven 3D molded shoe uppers.

Background technique

Shoes have a long history and are a tool for people to protect their feet from injury. With the development of technology, the functions and styles of shoes are becoming more and more diversified. Shoes are mainly composed of soles and uppers, while the styles and functions of shoes Many of them are embodied from the uppers. The existing uppers include leather uppers, canvas uppers, knitted uppers and so on.

The existing shoe upper structure is usually divided into front cover, back cover, toe cap, waist, eyelet and tongue. These parts are usually made separately and then stitched together to form a complete upper. The manufacturing process of the upper is general. Including material preparation, punching, peeling, toe cap shaping, shoe upper hemming, shoe upper or inner fitting, shoe upper or inner stitching, pasting ornaments or sewing, surface fitting, surface fitting, inner trimming The production process is numerous, the production efficiency is low, and the production cost remains high. If the pattern needs to be attached to different parts of the shoe upper, it must be printed or high-frequency pressed or the pattern must be sewn. It cannot be formed with the shoe upper at one time, which reduces The qualified rate of the product.

In response to the above-mentioned traditional cumbersome processes, emerging shoe upper manufacturing processes, specifically stitching, NO-SEW (seamless) and knitting, have a single pattern and obvious shortcomings. Among them, the upper of the stitching machine is relatively rough and the shape depends on it. The support is supported, the internal reinforcement is easy to fall off, especially the heel, and the pinhole is easy to be stretched and deformed, which consumes too much labor in operation; NO-SEW (no sewing) means that the A process that uses stitching, where the stitching cannot be seen on the upper, and is mainly used on mesh materials. The mesh and leather are eagerly bonded together with high frequency, and they are embodied on the mesh in a form of no sewing. The appearance looks more beautiful, but the machine is expensive, the efficiency is low, and there is still the risk of pulling force, and the operation also consumes too much labor; the most intuitive disadvantage of the knitted upper is that there is no support and it is easy to deform.

Summary of the invention

1. Technical problems to be solved

In view of the problems in the prior art, the purpose of the present invention is to provide a method for preparing flying knitted 3D molded shoe uppers, which can realize the combination of knitted shoe uppers and three-dimensional molding processes, and can customize various knitted patterns according to requirements. , Low cost and price advantage. Compared with the upper made by traditional technology, it has the characteristics of softer, more comfortable, more breathable, better shape, better three-dimensional effect, diversified appearance and cost saving.

2. Technical solution

To solve the above problems, the present invention adopts the following technical solutions.

A method for preparing flying woven 3D molded shoe uppers, the preparation method includes the following steps:

S1. Raw material selection: choose suitable synthetic fiber;

S2. Shoe upper design: design the shoe upper pattern through the computer's corresponding software according to the actual needs, and import the drawings of the upper body style and related knitting programs into the computer flat knitting machine;

S3. Flying knitting: knit the synthetic fiber obtained in S1 through a computerized flat knitting machine to obtain a pocket-like knitted semi-finished product;

S4. Inner lining moulding: Combine the inner fillers through flat pressing, and 3D moulds are hot pressed to form an elastic inner lining;

S5. Filling the inner lining: stuff the elastic inner lining obtained in S4 into the knitted semi-finished product obtained in S3 to obtain the three-dimensional rough embryo of the upper;

S6. Secondary molding: Put the three-dimensional rough embryo in S5 into a hot pressing machine for molding to obtain a finished shoe upper.

The present invention can realize the combination of knitted shoe upper and three-dimensional molding process, and can customize various knitted patterns according to demand. It has low cost and price advantage. Compared with shoe uppers made by traditional technology, it is softer, more comfortable and more comfortable. It has the characteristics of air permeability, better shaping, better three-dimensional effect, diversified appearance and cost saving.

Further, the synthetic fiber is a core-spun yarn obtained by wrapping 210D spandex with 75-300D polyester, and is sprayed with polyurethane hot melt adhesive. The polyurethane hot melt adhesive is composed of the following raw materials by weight: polyester polyol 65- 75 parts, 30-40 parts of diisocyanate, 3-5 parts of chain extender, 0.2-0.4 parts of viscosity modifier, 0.5-1 parts of antioxidant, high elastic synthetic fiber with sufficient elasticity, high strength, strong tensile resistance, polyurethane heat Melt adhesives have higher stability in high-heat environments, and improve the obvious decline of the existing hot-melt adhesives in high-temperature environments.

Further, the step S6 includes positioning and hot pressing, and both positioning and hot pressing use a customized mold in a hot pressing machine, the customized mold includes a lower mold and an upper mold, and the cavity of the lower mold is fixedly connected There are three positioning mechanisms. Three storage slots matching the positioning mechanism are excavated at the lower end of the upper mold. The positioning mechanism can smoothly store the three-dimensional rough embryo into the storage slot without affecting the lower mold and the positioning mechanism. Clamping between the upper molds.

Further, the positioning mechanism includes a fixed seat, a lifting plate, a connecting plate, and a shaping press plate. A movable groove is cut at the lower end of the fixed base, and the shaping press plate is located in the movable groove. The lifting plate is located on the upper side of the fixed seat and connected The plate is fixedly connected to the lower end of the lifting plate, the upper end of the fixed seat is cut with a through hole that communicates with the movable groove, and the through hole matches the connecting plate, and the three-dimensional rough embryo is sequentially passed through the movable groove at the lower end of the fixed seat by pressing down The lifting plate indirectly drives the shaping press plate to fix the three-dimensional rough embryo, so that the three-dimensional rough embryo is spread in the cavity, and it is not easy to wrinkle during the hot pressing process, which plays a role in shaping.

Further, both the left and right ends of the fixing seat are drilled with T-shaped screw holes, the inner thread of the T-shaped screw hole is connected with a bolt, and one end of the bolt close to the shaping plate is fixedly connected with a positioning block, and the left and right ends of the shaping plate Both are drilled with positioning holes that match the positioning block, and the positioning block is inserted into the positioning hole by bolts to realize the fixing of the shaping plate, so that the shaping plate can better press and fix the three-dimensional rough embryo, and it is not easy to close the lower mold and the upper mold. Deviation or shrinkage occurred during the molding process.

Further, it also includes step S7: quality inspection, which includes Martindale wear resistance, color fastness to rubbing, breaking strength, elongation at break, elongation at fixed strength, aging resistance, breaking strength and resistance If the color fastness to soaping is unqualified in the step S7, the process returns to step S3.

Further, in the step S3, an antibacterial layer is also formed on the knitted semi-finished product by a dipping or spraying process. The antibacterial layer contains nano silver, antibacterial talcum powder and bamboo charcoal powder in a mass ratio of 1:1:1, which gives the shoe an excellent upper The antibacterial function.

Further, the synthetic fiber obtained in the step S1 can also be immersed in a ferromagnetic fluid, the ferromagnetic fluid is a colloidal solution composed of magnetic nanoparticles, and the magnetic nanoparticles have a particle size of 10nm-100nm, Said step S6 also includes applying a suitable external magnetic field to guide the magnetic force by applying the external magnetic field, and the auxiliary positioning mechanism uniformly stretches and positions the three-dimensional rough embryo, so that the three-dimensional rough embryo is not prone to wrinkles or misalignment during hot pressing. .

Further, in the step S3, the environmental temperature is controlled at 15-25°C, and the relative humidity is controlled at 50-60%.

Further, the molding temperature in step S6 is 160-185°C, the molding time is 220-280s, and the pressure is 40-160 kg/cm ² .

3. Beneficial effects

Compared with the prior art, the advantages of the present invention are:

(1) This solution can realize the combination of knitted shoe upper and three-dimensional molding process, and can customize various knitted patterns according to needs. It has low cost and price advantage. Compared with the shoe upper made by traditional technology, it is softer and more flexible. Comfortable, more breathable, better shaping, better three-dimensional, diversified appearance and cost-saving characteristics.

(2) Step S6 includes positioning and hot pressing. Both positioning and hot pressing use a customized mold in a hot pressing machine. The customized mold includes a lower mold and an upper mold. The cavity of the lower mold is fixedly connected with three positioning mechanisms. The lower end of the upper mold There are three storage slots matching with the positioning mechanism. The positioning mechanism can smoothly store the three-dimensional rough embryo into the storage slot while shaping and positioning the three-dimensional rough embryo without affecting the clamping between the lower mold and the upper mold.

(3) The positioning mechanism includes a fixed seat, a lifting plate, a connecting plate, and a shaping plate. The lower end of the fixed seat has a movable groove, and the shaping plate is located in the movable groove, the lifting plate is located on the upper side of the fixed seat, and the connecting plate is fixedly connected to the lifting plate At the lower end, the upper end of the fixed seat has a through hole that communicates with the movable groove, and the through hole matches the connecting plate. The three-dimensional rough embryo is sequentially passed through the movable groove at the lower end of the fixed seat, and the shaping plate is indirectly driven by the down-pressing lifting plate to be fixed. The three-dimensional rough embryo makes the three-dimensional rough embryo spread in the cavity, and it is not prone to wrinkles during the hot pressing process, which plays a role in shaping.

(4) T-shaped screw holes are drilled at the left and right ends of the fixing seat. The inner thread of the T-shaped screw hole is connected with bolts. One end of the bolt near the shaping plate is fixedly connected with positioning blocks. Both the left and right ends of the shaping plate are cut to match the positioning blocks. In the positioning hole, the positioning block is inserted into the positioning hole by bolts to realize the fixation of the shaping plate, so that the shaping plate can better press and fix the three-dimensional rough blank, and it is not easy to offset or occur during the closing of the lower mold and the upper mold. shrink.

(5) In step S3, an antibacterial layer is also formed on the knitted semi-finished product through a dipping or spraying process. The antibacterial layer contains nano silver, antibacterial talcum powder and bamboo charcoal powder in a mass ratio of 1:1:1, giving the shoe upper an excellent antibacterial function.

(6) The synthetic fiber obtained in step S1 can also be immersed in a ferromagnetic fluid. The ferromagnetic fluid is a colloidal solution composed of magnetic nanoparticles. The particle diameter of the magnetic nanoparticles is 10nm-100nm. Step S6 also includes applying A suitable external magnetic field is used to guide the magnetic force by applying an external magnetic field, and the auxiliary positioning mechanism evenly stretches and positions the three-dimensional rough embryo, so that the three-dimensional rough embryo is not prone to wrinkles or dislocation during hot pressing.

Description of the drawings

Figure 1 is a process flow diagram of the present invention;

Figure 2 is a schematic diagram of the structure of the customized mold part of the present invention;

Figure 3 is a schematic structural diagram of the positioning mechanism of the present invention in an unpositioned state;

4 is a schematic diagram of the structure of the positioning mechanism of the present invention in a positioning state;

Figure 5 is a schematic diagram of the structure of the finished shoe upper of the present invention.

Explanation of labels in the figure:

1 lower mold, 2 upper mold, 3 storage slot, 4 fixing seat, 5 lifting plate, 6 connecting plate, 7 shaping press plate, 8T type screw hole, 9 bolt, 10 positioning hole, 11 positioning block.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, not all the embodiments, based on The embodiments of the present invention, and all other embodiments obtained by those of ordinary skill in the art without creative work, fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", and "top/bottom" are based on the directions shown in the drawings. Or the positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the pointed device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise clearly defined and defined, the terms "installed", "provided with", "set/connected", "connected", etc., should be interpreted broadly, such as " "Connected" can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be inside two components. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present invention can be understood under specific circumstances.

Example 1:

Please refer to Figure 1, a method for preparing flying woven 3D molded shoe uppers. The method includes the following steps:

S1. Raw material selection: choose suitable synthetic fiber;

S3. Flying knitting: knit the synthetic fiber obtained in S1 through a computerized flat knitting machine, control the ambient temperature at 20°C, and the relative humidity at 50% to obtain a pocket-like knitted semi-finished product;

S6. Secondary molding: Put the three-dimensional rough embryo in S5 into a hot pressing machine for molding, molding temperature is 160℃, molding time is 2250s, pressure is 40kg/cm ² , and the finished shoe upper is obtained;

S7: Quality inspection, including Martindale abrasion resistance, color fastness to rubbing, breaking strength, elongation at break, elongation at fixed strength, aging resistance, breaking strength and color fastness to soaping, step S7 quality If the inspection fails, the process returns to step S3.

Synthetic fiber is a core-spun yarn obtained from 75-300D polyester wrapped with 210D spandex, and sprayed with polyurethane hot melt adhesive. The polyurethane hot melt adhesive is composed of the following raw materials: 65 parts of polyester polyol, 30 parts of diisocyanate, expanded Chain agent 3 parts, viscosity modifier 0.2 parts, antioxidant 0.5 parts, high elastic synthetic fiber has sufficient elasticity, high strength, strong tensile resistance, polyurethane hot melt adhesive has high stability in high heat environment, and improves the existing heat The phenomenon that the adhesive effect of melt adhesive decreases significantly under high temperature environment.

Please refer to Figure 1-4. Step S6 includes positioning and hot pressing. Both positioning and hot pressing use a customized mold in a hot pressing machine. The customized mold includes a lower mold 1 and an upper mold 2. The cavity of the lower mold 1 has three fixed connections. Two positioning mechanisms. Two of the three positioning mechanisms are fixed at the side and one is fixed at the bottom. Three storage slots 3 matching the positioning mechanism are excavated at the lower end of the upper mold 2. The positioning mechanism performs shaping and positioning of the three-dimensional rough embryo. It can be smoothly stored in the storage slot 3 without affecting the clamping between the lower mold 1 and the upper mold 2. The positioning mechanism includes a fixed seat 4, a lifting plate 5, a connecting plate 6 and a shaping plate 7. The shaping plate 7 and the shaping plate The cavity walls are matched to better position the three-dimensional rough blank in the cavity. A movable groove is cut at the lower end of the fixed seat 4, and the shaping plate 7 is located in the movable groove, and the lifting plate 5 is located on the upper side of the fixed seat 4 and connected The plate 6 is fixedly connected to the lower end of the lifting plate 5, the upper end of the fixed seat 4 is cut with a through hole communicating with the movable groove, and the through hole matches the connecting plate 6, and the three-dimensional rough embryo is sequentially passed through the movable groove at the lower end of the fixed seat 4. Pressing the lifting plate 5 indirectly drives the shaping plate 7 to fix the three-dimensional rough embryo, so that the three-dimensional rough embryo is spread in the cavity, and it is not easy to wrinkle during the hot pressing process, which plays a role in shaping. Both the left and right ends of the fixing seat 4 A T-shaped screw hole 8 is excavated. The internal thread of the T-shaped screw hole 8 is connected with a bolt 9. One end of the bolt 9 close to the shaping plate 7 is fixedly connected with a positioning block 11. Both the left and right ends of the shaping plate 7 are excavated with matching positioning blocks 11 In the positioning hole 10, the positioning block 11 is inserted into the positioning hole 10 with the bolt 9 to realize the fixation of the shaping plate 7 so that the shaping plate 7 can better press and fix the three-dimensional rough blank, and it is not easy to close the lower mold 1 and the upper mold 2. Offset or shrinkage occurred during the process.

When positioning, the technician puts the three-dimensional rough blank into the cavity after matching, confirming that it is spread flat until no wrinkles are visible on the surface, and then presses down the lifting plate 5 on the positioning mechanism in turn, and indirectly drives the shaping plate 7 down to press and fix the three-dimensional rough Please pay attention to operate the positioning mechanism at the bottom first, that is, follow the positioning principle of the bottom first and then the side. After pressing, screw the bolt 9 into the T-shaped screw hole 8 with a professional tool, and at the same time drive the positioning block 11 to be inserted into the positioning hole 10. After the positioning is completed, the technical personnel will operate the hot pressing machine according to their professional skills to close the lower mold 1 and the upper mold 2 and heat-press them to form. The molded shoe surface is well shaped and beautiful.

In step S3, an antibacterial layer is also formed on the knitted semi-finished product through a dipping or spraying process. The antibacterial layer contains nano silver, antibacterial talcum powder and bamboo charcoal powder in a mass ratio of 1:1:1, giving the shoe upper an excellent antibacterial function.

The synthetic fiber obtained in step S1 can also be immersed in a ferromagnetic fluid. The ferromagnetic fluid is a colloidal solution composed of magnetic nanoparticles. The particle size of the magnetic nanoparticles is 10nm-100nm. Step S6 also includes applying a suitable external The magnetic field, through the application of an external magnetic field to guide the magnetic force, the auxiliary positioning mechanism uniformly stretches and positions the three-dimensional rough embryo, so that the three-dimensional rough embryo is not prone to wrinkles or dislocation during hot pressing. It is worth noting that the technicians can actually Choose to impregnate or partially impregnate the synthetic fiber with magnetization. All impregnation magnetization is more expensive, but the distribution in the external magnetic field is more uniform. The three-dimensional rough embryo can be positioned flatly in the cavity under the action of the magnetic field. , It can assist the positioning mechanism to better shape the three-dimensional rough embryo, so that the finished shoe upper after thermoforming is better shaped; the partial impregnation magnetization treatment cost is lower, and the corresponding knitting program can be introduced to make the computer flat knitting machine During knitting, weaving the impregnated and magnetized synthetic fibers on the peripheral edges of the knitted semi-finished products can also assist the positioning mechanism, but during positioning, it takes time for technicians to spend time and self-leveling and positioning. External magnetic field The application can be achieved by electromagnets.

The invention can realize the combination of knitted shoe upper and three-dimensional molding process, in which flying knitting and lining molding can be performed separately and synchronously, or even reversed, can be flexibly applied to various practical situations, and various knitted patterns can be customized according to requirements , To meet customer needs and market trend changes, low cost and price advantage, compared with the upper made by traditional technology, it is softer, more comfortable, more breathable, better shaped, better three-dimensional, and has a variety of appearance patterns. Features of sizing and cost saving.

The above are only preferred specific embodiments of the present invention; but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field within the technical scope disclosed in the present invention, equivalent replacements or changes according to the technical solution and improvement concept of the present invention shall be covered by the protection scope of the present invention.

Claims

A method for preparing flying woven 3D molded shoe uppers, characterized in that: the preparing method includes the following steps:

S1. Raw material selection: choose suitable synthetic fiber;

S2. Shoe upper design: design the shoe upper pattern through the computer's corresponding software according to the actual needs, and import the drawings of the upper body style and related knitting programs into the computer flat knitting machine;

S3. Flying knitting: knit the synthetic fiber obtained in S1 through a computerized flat knitting machine to obtain a pocket-like knitted semi-finished product;

S4. Inner lining moulding: Combine the inner fillers through flat pressing, and 3D moulds are hot pressed to form an elastic inner lining;

S5. Filling the inner lining: stuff the elastic inner lining obtained in S4 into the knitted semi-finished product obtained in S3 to obtain the three-dimensional rough embryo of the upper;

S6. Secondary molding: Put the three-dimensional rough embryo in S5 into a hot pressing machine for molding to obtain a finished shoe upper.
The method for preparing flying woven 3D molded shoe uppers according to claim 1, characterized in that the synthetic fiber is a core-spun yarn obtained by wrapping 210D spandex with 75-300D polyester and sprinkling with polyurethane hot melt adhesive. The polyurethane hot melt adhesive is composed of the following raw materials in parts by weight: 65-75 parts by weight of polyester polyol, 30-40 parts of diisocyanate, 3-5 parts of chain extender, 0.2-0.4 parts of viscosity modifier, and 0.5-part antioxidant. 1 serving.
The method for preparing flying-woven 3D molded shoe uppers according to claim 1, characterized in that: the step S6 includes positioning and hot pressing, and the positioning and hot pressing are made by a customized mold in a hot pressing machine, so The customized mold includes a lower mold (1) and an upper mold (2). The cavity of the lower mold (1) is fixedly connected with three positioning mechanisms, and the lower end of the upper mold (2) is excavated with three positioning mechanisms to match The storage slot (3).
A method for preparing flying-woven 3D molded shoe uppers according to claim 3, characterized in that: the positioning mechanism includes a fixing seat (4), a lifting plate (5), a connecting plate (6) and a shaping plate (7) ), a movable groove is excavated at the lower end of the fixed seat (4), and the shaping plate (7) is located in the movable groove, the lifting plate (5) is positioned on the upper side of the fixed seat (4), and the connecting plate (6) is fixedly connected At the lower end of the lifting plate (5), a through hole communicating with the movable groove is excavated at the upper end of the fixing seat (4), and the through hole matches the connecting plate (6).
The method for preparing flying-woven 3D molded shoe uppers according to claim 4, characterized in that: both left and right ends of the fixing seat (4) are drilled with T-shaped screw holes (8), and the T-shaped screw holes (8) The internal thread is connected with a bolt (9). One end of the bolt (9) close to the shaping plate (7) is fixedly connected with a positioning block (11). The left and right ends of the shaping plate (7) are cut with positioning blocks. (11) Matching positioning hole (10).
The method for preparing flying-woven 3D molded shoe uppers according to claim 1, characterized in that it further comprises step S7: quality inspection, said quality inspection including Martindale wear resistance, rubbing color fastness, fracture If the strength, elongation at break, elongation at constant strength, aging resistance, breaking strength, and color fastness to soaping are unqualified in the step S7, the process returns to step S3.
The method for preparing flying-woven 3D molded shoe uppers according to claim 1, characterized in that: in step S3, an antibacterial layer is also formed on the knitted semi-finished product by a dipping or spraying process, and the antibacterial layer contains a mass ratio of 1 :1:1 nano silver, antibacterial talcum powder and bamboo charcoal powder.
The method for preparing flying-woven 3D molded shoe uppers according to claim 1, wherein the synthetic fibers obtained in step S1 can also be immersed in a ferromagnetic fluid, and the ferromagnetic fluid is magnetic The colloidal solution composed of nanoparticles, the magnetic nanoparticles have a particle size of 10 nm-100 nm, and the step S6 further includes applying a suitable external magnetic field.
The method for preparing flying-woven 3D molded shoe uppers according to claim 1, wherein in step S3, the environment temperature is controlled at 15-25°C and the relative humidity is controlled at 50-60%.
The method for preparing flying woven 3D molded shoe uppers according to claim 1, wherein the molding temperature in step S6 is 160-185°C, the molding time is 220-280s, and the pressure is 40-160kg/ cm 2 .