Thermosetting vamp spinning method

Abstract

The invention relates to a thermoset vamp spinning method. The method comprises the following steps that a PUR material is added into a melting device to be heated and melted; printing ink and polyhydric alcohol are added into the storage device, hot air is blown out by the nozzle, and a mixture is sprayed out along with the hot air; the control module sends an instruction, the material spraying assembly and the nozzle are matched with the mechanical arm, the material spraying assembly and the nozzle conduct spraying around the shoe tree, the nozzle synchronously aligns with the weaving thread to spray a mixture, the control module sends the instruction to the switcher, and the switcher changes the spraying pressure to form gradient colors; and the control module sends an instruction to the laser module for trimming. The PUR material and the printing ink can both have colors, can be freely arranged and crossed to form gradient colors, have colorful visual impact, are more fashionable in color matching, and show extreme personality and vitality; the material spraying assembly is a flat multi-nozzle device, a plurality of threads can be sprayed out at the same time through a transverse nozzle, the vamp spinning speed is increased, and the production efficiency is improved by 30% or above.

Description

Technical Field

[0001] The invention relates to the field of shoes, in particular to a thermosetting shoe upper weaving method. Background Art

[0002] Shoes are a necessity for people and an important tool for people to protect their feet. With the continuous improvement of production technology, there are many styles of shoes to meet the needs of different groups of people. The traditional shoemaking method is to first make the sole and upper separately through their own molds, then glue the fabric and the sole together, and finally add the lining to make the finished shoe; the above-mentioned shoemaking process requires manual bonding of the sole and the upper. This manual bonding method is cumbersome, time-consuming and labor-intensive, and has low production efficiency. The volatilization of the glue components during the compounding process pollutes the environment, which is not environmentally friendly and has a great harm to the health of workshop workers.

[0003] Referring to the invention patent with application number 2021800668020, a method for manufacturing textile materials, especially shoe uppers, is disclosed. The application of the molten polymer compound to the forming bracket is achieved by means of a nozzle, which has an outflow opening for the molten polymer compound and a plurality of air exhaust openings arranged around the outflow opening, from which compressed air is loaded onto the outflowing polymer compound in such a way that the molten polymer compound flowing out of the nozzle is applied to the forming bracket as a spiral filament. This patented technical solution overcomes the difficulty of traditional upper and sole stitching technology, but there are still shortcomings. This type of upper has a single color and unfashionable color matching, which cannot meet the needs of young consumers. In addition, the equipment cannot be freely cut, the shape of the upper opening is relatively monotonous, lacks a three-dimensional design sense, and has low wearing comfort. Summary of the invention

[0004] The present invention provides a thermosetting shoe upper weaving method to solve the problems of the shoe uppers having unfashionable color matching, low attractiveness, lack of three-dimensional design sense in the openings, and low wearing comfort.

[0005] The present invention adopts the following technical solution:

[0006] A method for weaving a thermosetting shoe upper comprises the following steps:

[0007] Step 1, adding the PUR material into a melting device and heating and melting it until the PUR material is liquid, and conveying the material to the spraying assembly through an insulated conveying pipeline by a gear pump;

[0008] Step 2, adding ink and polyol into a storage device, mixing them evenly to obtain a mixture, conveying the mixture into a nozzle, blowing hot air out of the nozzle, the temperature of the hot air is above 50° C., and the mixture is sprayed out with the hot air;

[0009] Step 3, the control module sends a command to the robotic arm to grab the shoe last with the sole at the bottom to the vicinity of the spraying assembly, and the robotic arm can drive the shoe last to rotate in multiple directions;

[0010] Step 4, the control module sends instructions, the spray assembly, the nozzle and the robot arm cooperate, the spray assembly and the spray nozzle spray around the shoe last, the spray assembly synchronously sprays a longitudinal weave and at least two transverse weaves, the transverse weaves synchronously cross the longitudinal weaves, the nozzle synchronously aims at the weaves to spray the mixture, the mixture accelerates the curing and forming of the raw materials, during the spraying process, the control module sends instructions to the switch, the switch changes the spray pressure to form a gradient color;

[0011] Step 5, the control module sends instructions to the laser module for trimming. After the sole is scanned by 3D vision, the information is stored and the trimming position is determined. Then, after the robotic arm puts the sole into the cavity, the instrument automatically identifies the model number, matches the stored information, selects the trimming position and cuts.

[0012] Furthermore, the PUR material is an isocyanate-terminated polyurethane prepolymer formed by polymerization of isocyanate and polyol.

[0013] Furthermore, the polyisocyanate is one or both of aliphatic diisocyanate and aromatic diisocyanate.

[0014] Furthermore, the above-mentioned polyol is one or both of polyester diol and polyether diol.

[0015] Furthermore, the above-mentioned spray assembly includes a longitudinal nozzle and at least two transverse nozzles, a spray hole for spraying is provided at the axis of the nozzle, and a plurality of air holes are distributed around the spray hole. The axis of the air hole is not parallel to the axis of the spray hole. The air sprayed from the air hole causes the polymer flowing out of the spray hole to be in the shape of strips or spirals. The spray device synchronously sprays multiple transverse weaving lines through five holes to form a webbing with a width of 0.5mm to 20mm, preferably 10mm.

[0016] Furthermore, the strip-shaped polymer flowing out of the above-mentioned nozzle has a thickness of 0.21 mm to 1.0 mm, and preferably has a thickness of 0.51 mm.

[0017] Furthermore, the air pressure of the gear pump is 0.2Mpa to 0.7Mpa.

[0018] Furthermore, the laser module cutting is to cut the edge of the shoe opening into different arcs; the laser module cutting is to cut an opening at the edge of the shoe opening; the laser module cutting is to cut small holes of different shapes on the upper.

[0019] Furthermore, the area of ​​the sole in contact with the upper needs to be surface treated to form a sticky bonding surface.

[0020] Furthermore, the height of the sole area in contact with the upper is 3mm-15mm, preferably 5mm.

[0021] Further, the sole comprises at least one of thermoplastic polyurethane sole, polyurethane foam sole, ETPU sole, EVA foam sole, rubber-plastic foam sole, rubber sole and PVC sole, i.e., a combination sole comprising two soles combined together, such as a combination sole in which an EVA foam sole and a rubber sole are bonded together.

[0022] Furthermore, the sole area in contact with the upper needs to be surface treated to form a sticky adhesive surface. The sole area in contact with the upper is an EVA foam sole, which needs to be cleaned, brushed with a treatment agent, dried, brushed with glue, and dried before it can be installed on the shoe last; before spraying the shoe, the surface needs to be preheated with hot air at a temperature of 45°C-60°C, preferably 55°C.

[0023] Furthermore, the sole area in contact with the upper is a polyurethane foam sole or an ETPU sole, which needs to be brushed with a treatment agent and dried before it can be installed on the shoe last; before spraying the shoe, the surface needs to be preheated by spraying hot air at a temperature of 45°C-60°C, preferably 55°C.

[0024] Furthermore, the sole area in contact with the upper is a TPU sole, which needs to be brushed with a treatment agent, dried, brushed with glue, and dried before it can be installed on the shoe last; before spraying the shoe, the surface needs to be preheated by spraying hot air at a temperature of 60°C-80°C, preferably 70°C.

[0025] Furthermore, the sole area in contact with the upper is a rubber sole, which needs to be brushed with a treatment agent, dried, brushed with glue, and dried before it can be installed on the shoe last; before spraying the shoe, the surface needs to be preheated by spraying hot air at a temperature of 60°C-90°C, preferably 75°C.

[0026] Furthermore, if the surface of the sole area in contact with the upper is covered with PUR material and / or an adhesive film, it needs to be preheated by spraying hot air at a temperature of 60°C-90°C before spraying the shoe.

[0027] Furthermore, the height of the sole area in contact with the upper is 3mm-15mm, preferably 5mm.

[0028] It can be seen from the above description of the present invention that, compared with the prior art, the present invention has the following advantages:

[0029] 1. The PUR material and ink of this application can be colored and can be freely set to cross to form a gradient color, which has a richer visual impact and a more fashionable color scheme, showing extreme personality and vitality.

[0030] 2. This application uses laser cutting to achieve multi-shape design of the edge position, free cutting, adapting to the foot shapes of different users, and providing a high degree of comfort when wearing.

[0031] 3. The thermoplastic material of the present application is cross-linked, has better material toughness, can use finer spinneret holes, and can have larger gaps. It can also provide good mechanical properties and better air permeability, keeping the inside of the shoe clean and hygienic.

[0032] 4. The spray assembly of the present application is a flat multi-nozzle device. The horizontal nozzle can spray multiple lines at the same time, and the vertical nozzle moves up and down to achieve up and down swing spraying. The weaving lines are connected vertically and horizontally to speed up the weaving speed of the shoe upper and improve the production efficiency by more than 30%. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the structure in which the transverse weaving lines and the longitudinal weaving lines of this application intersect Figure 1 .

[0034] Figure 2 This is a schematic diagram of the structure in which the transverse weaving lines and the longitudinal weaving lines of this application intersect Figure 2 .

[0035] Figure 3 This is a schematic diagram of the structure of the melting device, robotic arm and storage device of the present application.

[0036] Figure 4 This is a schematic diagram of the structure of the multi-nozzle device of the present application.

[0037] Figure 5 This is a schematic diagram of the structure in which the transverse weaving lines and the longitudinal weaving lines of this application intersect Figure 3 . DETAILED DESCRIPTION

[0038] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0039] Example 1

[0040] A method for weaving a thermosetting shoe upper comprises the following steps:

[0041] Step 1, refer to Figure 3 , adding the PUR material into the melting device 1 and heating and melting it until the PUR material is in liquid state, and conveying the material to the spraying assembly 3 through the heat-insulating conveying pipe 11 by a gear pump;

[0042] Step 2, refer to Figure 3 , ink and polyol are added into the storage device 4, mixed evenly to obtain a mixture, and the mixture is transported into the nozzle 42, the nozzle 42 is connected to the heating module 41, the nozzle 42 blows out hot air, the temperature of the hot air is 55°C, and the mixture is sprayed out with the hot air;

[0043] Step 3, the control module 12 sends a command to the robot arm 2 to grab the shoe last 21 with the sole 22 at the bottom to the vicinity of the spraying assembly 3, and the robot arm 2 can drive the shoe last 21 to rotate in multiple directions;

[0044] Step 4, refer to Figure 1-4 , the control module 12 sends instructions, the spraying assembly 3, the nozzle 42 cooperate with the mechanical arm 2, the spraying assembly 3 and the spraying nozzle 42 spray around the shoe last 21, the spraying assembly 3 synchronously sprays a longitudinal weave and at least two transverse weaves, the transverse weaves synchronously cross the longitudinal weaves, the nozzle 42 synchronously sprays the mixture on the weaves, the mixture accelerates the curing and forming of the raw materials, during the spraying process, the control module 12 sends instructions to the switch, the switch changes the spraying pressure to form a gradient color;

[0045] Step 5, the control module 12 sends instructions to the laser module for trimming. After the sole 22 is scanned by 3D vision, the information is stored and the trimming position is determined. Then, after the robotic arm puts the sole 22 into the cavity, the instrument automatically identifies the model number, matches the stored information, selects the trimming position and cuts.

[0046] The PUR material is an isocyanate-terminated polyurethane prepolymer formed by the polymerization reaction of isocyanate and polyol.

[0047] The above polyisocyanate is diphenylmethane diisocyanate.

[0048] The above polyol is a polyester diol.

[0049] The shoe last 21 with the sole 22 at the bottom means that the sole 22 is fixed to the bottom of the shoe last 21, and the sole 22 will not fall off when the robot arm 2 rotates in multiple directions; the sole 22 is fixed to the shoe last 21 by hot melt adhesive, and an air pipe is installed on the shoe last 21 to fix the sole 22 by negative pressure.

[0050] The above-mentioned spray assembly 3 includes a longitudinal nozzle 32 and three transverse nozzles 31. A spray hole 30 for spraying is provided at the axis of the nozzle. A plurality of air holes 301 are distributed around the spray hole 30. The axis of the air hole 301 is not parallel to the axis of the spray hole 30. The air sprayed from the air hole 301 causes the polymer flowing out of the spray hole 30 to be in a strip or spiral shape. The spray device synchronously sprays three transverse weaving lines from three holes to form a webbing with a width of 0.5mm to 20mm, preferably 10mm.

[0051] Reference Figure 1 and Figure 2The above-mentioned spray assembly 3 synchronously sprays a longitudinal weaving line and three transverse weaving lines in a wave-like shape. First, three transverse weaving lines are sprayed out horizontally from three spray holes 30, and then another spray hole 30 swings the spray material up and down to spray out an oblique straight line (i.e., the longitudinal weaving line) synchronously connecting the above-mentioned three transverse weaving lines. The slope of the oblique straight line is related to the running speed. The slower the speed, the denser the squares formed.

[0052] The thickness of the strip-shaped polymer flowing out of the nozzle 30 is 0.21 mm to 1.0 mm, and preferably 0.51 mm.

[0053] The laser module cutting mentioned above is to cut the edge of the shoe opening into different arcs; the laser module cutting mentioned above is to cut an opening at the edge of the shoe opening to make the shoe opening wider, which is beneficial for feet with thick insteps; the laser module cutting mentioned above is to cut small holes of different shapes on the upper. You can wear shoelaces or elastic bands to make the upper closer to your feet.

[0054] The sole 22 is a thermoplastic polyurethane sole 22, and the area of ​​the sole 22 in contact with the upper is 6 mm high. The area of ​​the sole 22 in contact with the upper is treated with a TPU treatment agent, dried, and then installed on the shoe last 21; before spraying the shoe, the spray gun 33 sprays 75°C hot air to the area of ​​the sole 22 in contact with the upper.

[0055] Furthermore, the area of ​​the sole 22 in contact with the upper has a height of 3 mm to 15 mm, preferably 5 mm.

[0056] After step 5 is completed, a complete shoe is obtained, with the upper and the sole 22 bonded together.

[0057] Example 2

[0058] A method for weaving a thermosetting shoe upper comprises the following steps:

[0059] Step 1, adding the PUR material into the melting device 1 and heating and melting it until the PUR material is in liquid state, and conveying the material to the spraying assembly 3 through the heat-insulating conveying pipe 11 by a gear pump;

[0060] Step 2, refer to Figure 3 , ink and polyol are added into the storage device 4, mixed evenly to obtain a mixture, and the mixture is transported into the nozzle 42, the nozzle 42 is connected to the heating module 41, the nozzle 42 blows out hot air, the temperature of the hot air is 60°C, and the mixture is sprayed out with the hot air;

[0061] Step 3, refer to Figure 3 , the control module 12 sends a command to the robot arm 2 to grab the shoe last 21 with the sole 22 at the bottom to the vicinity of the spraying assembly 3, and the robot arm 2 can drive the shoe last 21 to rotate in multiple directions;

[0062] Step 4, refer to Figure 1-4, the control module 12 sends instructions, the spraying assembly 3, the nozzle 42 cooperate with the mechanical arm 2, the spraying assembly 3 and the spraying nozzle 42 spray around the shoe last 21, the spraying assembly 3 synchronously sprays a longitudinal weave and at least two transverse weaves, the transverse weaves synchronously cross the longitudinal weaves, the nozzle 42 synchronously sprays the mixture on the weaves, the mixture accelerates the curing and forming of the raw materials, during the spraying process, the control module 12 sends instructions to the switch, the switch changes the spraying pressure to form a gradient color;

[0063] Step 5, the control module 12 sends instructions to the laser module for trimming. After the sole 22 is scanned by 3D vision, the information is stored and the trimming position is determined. Then, after the robotic arm puts the sole 22 into the cavity, the instrument automatically identifies the model number, matches the stored information, selects the trimming position and cuts.

[0064] The PUR material is an isocyanate-terminated polyurethane prepolymer formed by the polymerization reaction of isocyanate and polyol.

[0065] The above polyisocyanate is hexamethylene diisocyanate.

[0066] The above-mentioned polyol is a polyether diol.

[0067] The shoe last 21 with the sole 22 at the bottom means that the sole 22 is fixed at the bottom of the shoe last 21, and the sole 22 will not fall off when the robot arm 2 rotates in multiple directions; the sole 22 is fixed to the shoe last 21 by a pin, and an air pipe is installed on the shoe last 21 to fix the sole 22 by negative pressure.

[0068] The above-mentioned spray assembly 3 includes a longitudinal nozzle 32 and five transverse nozzles 31. A spray hole 30 for spraying is provided at the axis of the nozzle. A plurality of air holes 301 are distributed around the spray hole 30. The axis of the air hole 301 is not parallel to the axis of the spray hole 30. The air sprayed from the air hole 301 causes the polymer flowing out of the spray hole 30 to be in a strip or spiral shape. The spray device synchronously sprays five transverse weaving lines from five holes to form a webbing with a width of 0.5mm to 20mm, preferably 8mm.

[0069] Reference Figure 5 The above-mentioned spray assembly 3 synchronously sprays a longitudinal weaving line and five transverse weaving lines. First, five transverse weaving lines are sprayed out in the horizontal direction from five spray holes 30, and then another spray hole 30 swings the spray material up and down to spray out an oblique straight line (i.e., the longitudinal weaving line) synchronously connecting the above-mentioned five transverse weaving lines. The slope of the oblique straight line is related to the running speed. The slower the speed, the denser the squares formed.

[0070] The thickness of the strip-shaped polymer flowing out of the nozzle 30 is 0.21 mm to 1.0 mm, preferably 0.21 mm to 0.4 mm.

[0071] The laser module cutting mentioned above is to cut the edge of the shoe opening into different arcs; the laser module cutting mentioned above is to cut an opening at the edge of the shoe opening to make the shoe opening wider, which is beneficial for feet with thick insteps; the laser module cutting mentioned above is to cut small holes of different shapes on the upper. You can wear shoelaces or elastic bands to make the upper closer to your feet.

[0072] The sole 22 is a polyurethane foam sole 22, and the area of ​​the sole 22 in contact with the upper is 6 mm high. The area of ​​the sole 22 in contact with the upper is treated with a TPU treatment agent and dried before being installed on the shoe last 21; before spraying the shoe, the spray gun 33 sprays 55°C hot air toward the area of ​​the sole 22 in contact with the upper.

[0073] After step 5 is completed, a complete shoe is obtained, with the upper and the sole 22 bonded together.

[0074] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A method for weaving a thermosetting shoe upper, characterized in that: The following steps are involved: Step 1, adding the PUR material into a melting device and heating and melting it until the PUR material is liquid, and conveying the material to the spraying assembly through an insulated conveying pipeline by a gear pump; Step 2, adding ink and polyol into a storage device, mixing them evenly in a mass ratio of 0.1-1:90-99 to obtain a mixture, conveying the mixture into a nozzle, blowing out hot air from the nozzle, the temperature of the hot air being above 50° C., and spraying the mixture out with the hot air; Step 3, the control module sends a command to the robotic arm to grab the shoe last with the sole at the bottom to the vicinity of the spraying assembly, and the robotic arm can drive the shoe last to rotate in multiple directions; Step 4, the control module sends instructions, the spray assembly, the nozzle and the robot arm cooperate, the spray assembly and the spray nozzle spray around the shoe last, the spray assembly synchronously sprays a longitudinal weave and at least two transverse weaves, the transverse weaves synchronously cross the longitudinal weaves, the nozzle synchronously aims at the weaves to spray the mixture, the mixture accelerates the curing and forming of the raw materials, during the spraying process, the control module sends instructions to the switch, the switch changes the spray pressure to form a gradient color; Step 5, the control module sends instructions to the laser module for trimming. After the sole is scanned by 3D vision, the information is stored and the trimming position is determined. Then, after the robotic arm puts the sole into the cavity, the instrument automatically identifies the model number, matches the stored information, selects the trimming position and cuts.

2. A method for weaving a thermosetting shoe upper according to claim 1, characterized in that: The PUR material is an isocyanate-terminated polyurethane prepolymer formed by polymerization of isocyanate and polyol.

3. A method for weaving a thermosetting shoe upper according to claim 2, characterized in that: The polyisocyanate is one or both of aliphatic diisocyanate and aromatic diisocyanate.

4. A method for weaving a thermosetting shoe upper according to claim 2, characterized in that: The polyol is one or both of polyester diol and polyether diol.

5. A method for weaving a thermosetting shoe upper according to claim 1, characterized in that: The spray assembly includes a longitudinal nozzle and at least two transverse nozzles. A spray hole for spraying is provided at the axis of the nozzle. A plurality of air holes are distributed around the spray hole. The axis of the air hole is not parallel to the axis of the spray hole. Air sprayed from the air hole causes the polymer flowing out of the spray hole to be in a strip or spiral shape. The spray device synchronously sprays five transverse weaving lines from five holes to form a webbing with a width of 0.5 mm to 20 mm.

6. A method for weaving a thermosetting shoe upper according to claim 1, characterized in that: The thickness of the strip polymer flowing out of the nozzle is 0.21 mm to 1.0 mm.

7. A method for weaving a multi-color thermosetting shoe upper as claimed in claim 1, characterized in that: The air pressure of the gear pump is 0.2Mpa to 0.7Mpa.

8. A method for weaving a multi-color thermosetting shoe upper as claimed in claim 1, characterized in that: The laser module cutting is to cut the edge of the shoe opening into different arcs; the laser module cutting is to cut an opening at the edge of the shoe opening; the laser module cutting is to cut small holes of different shapes on the upper.

9. The multi-color shoe upper weaving method according to claim 1, characterized in that: The area of ​​the sole that contacts the upper needs to be surface treated to form a sticky bonding surface.

10. The multi-color shoe upper weaving method according to claim 1, characterized in that: The area of ​​the sole that contacts the upper is 3mm-15mm high.

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