A multi-color thermoset upper textile method
By using a multi-color thermosetting shoe upper textile method, which employs a mixture of isocyanate and polyol to spray cross-weave threads and combine them with laser cutting, the problems of low bonding efficiency and monotonous design of traditional shoe uppers and soles have been solved. This has enabled the production of shoe uppers with high efficiency and multi-color three-dimensional designs, improving wearing comfort and material performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- MAOTAI FUJIAN SOLES CO LTD
- Filing Date
- 2024-09-26
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional methods of bonding uppers and soles are cumbersome, time-consuming, labor-intensive, and have high labor costs. The glue is not strong enough and is prone to peeling, resulting in poor product quality. In addition, the colors are limited, the design lacks three-dimensionality, and the wearing comfort is low.
The multi-color thermosetting shoe upper textile method utilizes a mixture of isocyanate and polyol to form crisscross weaves through a spraying device. Combined with laser cutting technology, it achieves rapid curing and molding, as well as multi-shape design, and is operated collaboratively by a robotic arm and control module.
It improves production efficiency, achieves multi-color gradient effects and three-dimensional design, enhances the wearing comfort and structural flexibility of the shoe upper, and has good material toughness and excellent breathability.
Smart Images
Figure CN119329106B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of footwear, and in particular to a method for textileing multi-color thermosetting shoe uppers. Background Technology
[0002] Traditional shoes are usually made by gluing the upper to the sole. The gluing of the sole and the upper requires manual gluing. This manual gluing method is cumbersome, time-consuming, labor-intensive, inefficient, and has high labor costs. In addition, due to uneven force applied by manual operation, there is a large human error and a high defect rate. Moreover, the glue bond is not strong and is prone to delamination and separation when exposed to water, resulting in a short lifespan of the shoes and poor product quality.
[0003] Referring to the invention patent application number 2021800668020, a method for manufacturing textile materials, particularly shoe uppers, is disclosed. The application of molten polymer compound to a molding support is achieved via a nozzle having an outlet for the molten polymer compound and multiple air outlets arranged around the outlet. Compressed air is loaded onto the outflowing polymer compound, causing the molten polymer compound flowing from the nozzle to be applied to the molding support as a spiral filament. This patented technical solution overcomes the difficulties of traditional shoe upper and sole stitching techniques, but still has shortcomings. Such shoe uppers have limited color options and unfashionable color schemes, failing to meet the needs of young consumers. Furthermore, the equipment cannot freely cut the material, resulting in a monotonous upper opening shape, lack of three-dimensional design, and low wearing comfort. Summary of the Invention
[0004] This invention provides a method for textileing multi-color thermosetting shoe uppers to solve the problems mentioned above, such as unfashionable color schemes, low attractiveness, lack of three-dimensional design in the openings, and low wearing comfort.
[0005] The present invention adopts the following technical solution: A method for textileing multicolor thermosetting shoe uppers includes the following steps: Step 1: Add isocyanate raw material A into the first heat preservation device and keep it warm until the isocyanate is in liquid form; Step 2: Add the polyol raw material B into the second heat preservation device and keep it warm until the polyol is in liquid form. The polyol may be colored. Step 3: The isocyanate liquid from Step 1 and the polyol liquid from Step 2 are respectively transported by gear pumps through insulated conveying pipes to the front end of the spraying assembly one for uniform mixing, ready for spraying. Step 4: Load colored curing agent into the storage device connected to the spraying assembly 2. The temperature of the curing agent solution is 70℃-100℃, preferably 85℃, and it is ready for spraying. Step 5: The control module sends a command to the robotic arm to grab the shoe last with the sole on the bottom and move it to the vicinity of the spraying component. The robotic arm can drive the shoe last to rotate in multiple directions. Step 6: The control module sends a command, and the spraying components 1 and 2 cooperate with the robotic arm to spray around the shoe last. The spraying component 1 sprays one longitudinal weave line and at least two transverse weave lines simultaneously. The transverse weave lines intersect with the longitudinal weave lines simultaneously. The spraying component 2 sprays the curing agent onto the weave lines simultaneously. The curing agent accelerates the curing and molding of the raw material. During the spraying process, the control module sends a command to the switcher, and the switcher changes the spraying pressure to form a gradient color. Step 7: 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, the robotic arm puts the sole into the cavity, and the instrument automatically identifies the size, matches the stored information, selects the trimming position, and trims the sole.
[0006] Furthermore, the aforementioned polyol is one or two of polyester diol and polyether diol, preferably polyester diol.
[0007] Furthermore, the aforementioned polyol raw material B is obtained by mixing polyether polyol, epoxy urushiol, graphene oxide and catalyst in a mass ratio of 85-90 : 5-10 : 1-3 : 0.1-0.3 until homogeneous.
[0008] Furthermore, the aforementioned isocyanate is one or two of aliphatic diisocyanates and aromatic diisocyanates, preferably aliphatic diisocyanates.
[0009] Furthermore, the catalyst is one or more of organotin or titanate compounds, preferably a titanate compound.
[0010] Furthermore, the curing agent for the second spray of the above-mentioned spraying component is a polyamine catalyst.
[0011] Furthermore, the aforementioned spraying assembly includes a longitudinal nozzle and at least two transverse nozzles, preferably five nozzles. The nozzles have spray holes at their axial centers for spraying material. Multiple air holes are distributed around the spray holes. The axes of the air holes are not parallel to the axes of the spray holes. Air is ejected from the air holes, causing the polymer flowing out of the spray holes to be in a strip or spiral shape. The spraying device simultaneously sprays at least two transverse threads from at least two holes to form a webbing with a width of 0.5 mm to 20 mm, preferably 8 mm.
[0012] Furthermore, the thickness of the strip-shaped polymer flowing out of the above-mentioned nozzle is 0.21 mm to 1.0 mm, and preferably the thickness of the polymer is 0.35 mm.
[0013] Furthermore, the air pressure of the gear pump is 0.2 MPa to 0.7 MPa, preferably 0.7 MPa.
[0014] Furthermore, the aforementioned laser module cutting cuts the shoe opening edge into different arcs; the aforementioned laser module cutting cuts an opening along the shoe opening edge; the aforementioned laser module cutting cuts small holes of different shapes on the shoe surface.
[0015] Furthermore, the sole includes at least one of the following: thermoplastic polyurethane sole, polyurethane foam sole, ETPU sole, EVA foam sole, rubber-plastic foam sole, rubber sole, and PVC sole. That is, it includes a composite sole that combines two types of soles, such as a composite sole made by bonding an EVA foam sole and a rubber sole together.
[0016] Furthermore, the sole area in contact with the upper needs to undergo surface treatment to form an adhesive bonding surface. The sole area in contact with the upper is an EVA foam sole, which requires surface cleaning, application of treatment agent, drying, application of glue, and drying before it can be installed onto the shoe last. Before spraying the shoe, the surface needs to be preheated with hot air at a temperature of 45℃-60℃, preferably 55℃.
[0017] Furthermore, the sole area in contact with the upper is a polyurethane foam sole or an ETPU sole, which needs to be treated with a surface treatment agent 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℃-60℃, preferably 55℃.
[0018] Furthermore, the sole area in contact with the upper is a TPU sole, which requires surface treatment agent, drying, glue application, and drying before it can be installed onto the shoe last; before spraying the shoe, the surface needs to be preheated with hot air at a temperature of 60℃-80℃, preferably 70℃.
[0019] Furthermore, the sole area that contacts the upper is made of rubber. It needs to be treated with a surface treatment agent, dried, then coated with glue and dried again before it can be installed onto the shoe last. Before spraying the shoe, the surface needs to be preheated with hot air at a temperature of 60℃-90℃, preferably 75℃.
[0020] Furthermore, for sole areas in contact with the shoe upper that are covered with PUR material and / or adhesive film, the surface must be preheated with hot air at a temperature of 60℃-90℃ before spraying.
[0021] Furthermore, the height of the sole area in contact with the upper is 3mm-15mm, preferably 5mm.
[0022] As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following advantages: 1. The spraying assembly of this application is a flat multi-nozzle device. First, the horizontal nozzle can spray multiple lines simultaneously, and then the vertical nozzle moves up and down to achieve up and down spraying. The weaving lines cross and connect into one, which speeds up the weaving speed of shoe uppers and increases production efficiency by more than 30%.
[0023] 2. Both the polyols and curing agents in this application can be colored, and can be freely combined to form gradient colors, creating a richer visual impact and a more fashionable color scheme, showcasing ultimate individuality and vitality.
[0024] 3. The raw materials used in this application are a mixture of isocyanate and polyol. The curing agent accelerates the curing and molding of the raw materials in a short time, resulting in fast shoe upper weaving speed and suitability for mass production.
[0025] 4. This application uses laser cutting to achieve multi-shape design at the edge position, allowing for free cutting to adapt to different users' foot shapes, and the structural design has good flexibility.
[0026] 5. The thermoplastic material of this application is cross-linked, which has better toughness, allows for finer spinneret holes, larger gaps, and provides excellent mechanical properties. At the same time, it has better breathability, making it less likely to produce foot odor inside the shoe and more comfortable. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the structure where the horizontal and vertical weave lines intersect, as described in this application. Figure 1 .
[0028] Figure 2 This is a schematic diagram of the structure where the horizontal and vertical weave lines intersect, as described in this application. Figure 2 .
[0029] Figure 3 This is a schematic diagram of the melting device, robotic arm, and storage device of this application.
[0030] Figure 4 This is a schematic diagram of the multi-nozzle device of this application.
[0031] Figure 5 This is a schematic diagram of the structure where the horizontal and vertical weave lines intersect, as described in this application. Figure 3 . Detailed Implementation
[0032] The specific embodiments of the present invention will now be described with reference to the accompanying drawings. Example
[0033] A method for textileing multicolor thermosetting shoe uppers includes the following steps: Step 1, refer to Figure 3 Isocyanate raw material A is added to the first heat preservation device 1 and kept warm until the isocyanate is in liquid form; Step 2, refer to Figure 3 Add the polyol raw material B into the second heat preservation device 2 and keep it warm until the polyol is in liquid form. The polyol may be colored. Step 3, refer to Figure 3 The isocyanate liquid from step 1 and the polyol from step 2 are respectively transported by a gear pump through an insulated conveying pipe 11 to the front end of the spraying assembly 3 for uniform mixing and spraying. The front end of the spraying assembly 3 is connected to a heating module 42. Step 4: Load a colored curing agent into the storage device 4 connected to the spraying assembly 2 42. The temperature of the curing agent solution is 70℃-100℃, preferably 85℃. The curing agent can accelerate the reaction between raw material A and raw material B, and will also react with raw material A, promoting the curing reaction of isocyanate raw material A faster, ready for spraying. Step 5: The control module 12 sends a command to the robotic arm 5 to grab the shoe last 51 with the sole 52 on the bottom and move it to the vicinity of the spraying assembly. The robotic arm 5 can drive the shoe last 51 to rotate in multiple directions. Step 6, refer to Figure 1-4 The control module 12 sends a command, and the spraying component 3 and the spraying component 42 cooperate with the robotic arm 5. The spraying component 3 and the spraying component 42 spray around the shoe last 51. The spraying component 3 sprays one longitudinal weave and at least two transverse weaves simultaneously. The transverse weaves intersect with the longitudinal weave simultaneously. The spraying component 42 sprays the curing agent simultaneously onto the weave. The curing agent accelerates the curing and molding of the raw material. During the spraying process, the control module 12 sends a command to the switcher, and the switcher changes the spraying pressure to form a gradient color. Step 7: The control module 12 sends a command to the laser module for trimming. After the sole 52 is scanned by 3D vision, the information is stored and the trimming position is determined. Then, after the robotic arm puts the sole 52 into the cavity, the instrument automatically recognizes the model number, matches the stored information, selects the trimming position, and trims the sole.
[0034] The aforementioned polyol raw material B is obtained by mixing polyether polyol, epoxy urushiol, graphene oxide and catalyst in a mass ratio of 89:8:2.2:0.15.
[0035] The above isocyanate is hexamethylene diisocyanate.
[0036] The catalyst mentioned above is a titanate compound.
[0037] The curing agent for the above-mentioned spray component 2, spray 42, is a polyamine catalyst.
[0038] The aforementioned shoe last 51 with a sole 52 at the bottom refers to the shoe last 51 to which the sole 52 is fixed. The sole 52 will not detach when the robotic arm 5 rotates in multiple directions. The sole 52 is fixed to the shoe last 51 with hot melt adhesive. An air tube is installed on the shoe last 51, and the sole 52 is fixed in place by negative pressure. Reference Figure 4 The aforementioned spraying assembly 3 includes a longitudinal nozzle 31 and three transverse nozzles 32. The nozzle has a spray hole 30 for spraying material at its axis. Multiple air holes 301 are distributed around the spray hole 30. The axis of the air holes 301 is not parallel to the axis of the spray hole 30. The air ejected from the air holes 301 causes the polymer flowing out of the spray hole 30 to be in the form of strips.
[0039] The thickness of the strip-shaped polymer flowing out of the above-mentioned nozzle 30 is 0.21-1.0 mm, and preferably the thickness of the strip-shaped polymer is 0.3 mm to 0.6 mm.
[0040] The curing agent for the above-mentioned spray component 2, spray 42, is a polyamine catalyst.
[0041] Reference Figure 1 and 2 The aforementioned spraying component 3 synchronously sprays one longitudinal weave line and three transverse weave lines in a wave-like pattern. First, three transverse weave lines are sprayed horizontally from three nozzles 30, and then sprayed by another nozzle 30 swinging up and down to spray out a diagonal straight line (i.e., the longitudinal weave line) that synchronously connects the three transverse weave lines. The slope of the diagonal straight line is related to the running speed. The slower the speed, the denser the squares formed.
[0042] The spraying assembly synchronously sprays material from three holes to form a webbing with a width of 0.5mm to 20mm, preferably 8mm.
[0043] The air pressure of the aforementioned gear pump is 0.2 MPa to 0.7 MPa, preferably 0.7 MPa.
[0044] The aforementioned laser module cutting involves cutting the shoe opening edge into different arcs; it also involves cutting an opening along the shoe opening edge to make the opening wider, which is beneficial for feet with thick insteps; and it involves cutting small holes of different shapes on the shoe upper. This allows for the insertion of shoelaces or elastic bands, making the shoe upper fit the foot more snugly.
[0045] The sole 52 is a composite sole 52 of ETPU sole 52 and thermoplastic polyurethane sole 52. The forefoot area of the sole 52 that contacts the upper is ETPU sole 52, and the height of the sole 52 area that contacts the upper is 7mm. The heel area of the sole 52 that contacts the upper is thermoplastic polyurethane sole 52. The sole 52 area that contacts the upper is treated with TPU treatment agent, dried, glued, dried, and then installed on the shoe last 51. Before spraying the shoe, the spray gun 43 sprays hot air at 70°C onto the sole 52 area that contacts the upper.
[0046] After step five is completed, the complete shoe is obtained, with the upper and sole 52 glued together. Example
[0047] A method for textileing multicolor thermosetting shoe uppers, characterized by comprising the following steps: Step 1, refer to Figure 3 Isocyanate raw material A is added to the first heat preservation device 1 and kept warm until the isocyanate is in liquid form; Step 2, refer to Figure 3 Add the polyol raw material B into the second heat preservation device 2 and keep it warm until the polyol is in liquid form. The polyol may be colored. Step 3, refer to Figure 3 The isocyanate liquid from step 1 and the polyol from step 2 are respectively transported by a gear pump through an insulated conveying pipe 11 to the front end of the spraying assembly 3 for uniform mixing and spraying. The front end of the spraying assembly is connected to a heating module 42. Step 4, refer to Figure 3 A colored curing agent is loaded into the storage device 4 connected to the spraying assembly 2 42. The temperature of the curing agent solution is 70℃-100℃, preferably 85℃. The curing agent can accelerate the reaction between raw material A and raw material B, and will also react with raw material A, promoting the curing reaction of isocyanate raw material A to be faster, ready for spraying. Step 5: The control module 12 sends a command to the robotic arm 5 to grab the shoe last 51 with the sole 52 on the bottom and move it to the vicinity of the spraying assembly. The robotic arm 5 can drive the shoe last 51 to rotate in multiple directions. Step 6, refer to Figure 1-4 The control module 12 sends a command, and the spraying component 3 and the spraying component 42 cooperate with the robotic arm 5. The spraying component 3 and the spraying component 42 spray around the shoe last 51. The spraying component 3 sprays one longitudinal weave and at least two transverse weaves simultaneously. The transverse weaves intersect with the longitudinal weave simultaneously. The spraying component 42 sprays the curing agent simultaneously onto the weave. The curing agent accelerates the curing and molding of the raw material. During the spraying process, the control module 12 sends a command to the switcher, and the switcher changes the spraying pressure to form a gradient color. Step 7: The control module 12 sends a command to the laser module for trimming. After the sole 52 is scanned by 3D vision, the information is stored and the trimming position is determined. Then, after the robotic arm puts the sole 52 into the cavity, the instrument automatically recognizes the model number, matches the stored information, selects the trimming position, and trims the sole.
[0048] The aforementioned polyol raw material B is obtained by mixing polyester polyol, epoxy urushiol, graphene oxide and catalyst in a mass ratio of 85:5:3:0.1.
[0049] The above isocyanate is diphenylmethane diisocyanate.
[0050] The catalyst mentioned above is an organotin compound.
[0051] The curing agent for the above-mentioned spray component 2, spray 42, is a polyamine catalyst.
[0052] The shoe last 51 with the sole 52 at the bottom refers to the sole 52 being fixed to the bottom of the shoe last 51. When the robotic arm 5 rotates in multiple directions, the sole 52 will not fall off. The sole 52 is fixed to the shoe last 51 by a pin. An air tube is installed on the shoe last 51 to fix the sole 52 by negative pressure.
[0053] The aforementioned spraying assembly 3 includes a longitudinal nozzle 31 and five transverse nozzles 32. The nozzle has a spray hole 30 for spraying material at its axis. Multiple air holes 301 are distributed around the spray hole 30. The axis of the air holes 301 is not parallel to the axis of the spray hole 30. The air ejected from the air holes 301 causes the polymer flowing out of the spray hole 30 to be in the form of strips.
[0054] The thickness of the strip-shaped polymer flowing out of the above-mentioned nozzle 30 is 0.21mm-1.0mm, and preferably the thickness of the strip-shaped polymer is 0.21mm-0.3mm.
[0055] Reference Figure 5 The aforementioned spraying assembly simultaneously sprays one longitudinal weave thread and five transverse weave threads. First, five transverse weave threads are sprayed horizontally from five nozzles 30. Then, another nozzle 30 oscillates up and down to spray diagonal straight lines (i.e., longitudinal weave threads) that simultaneously connect with the five transverse weave threads. The angle of the diagonal straight line is related to the operating speed; the slower the speed, the denser the grid formed. The spraying assembly simultaneously sprays from five nozzles, forming a webbing with a width of 0.5mm to 20mm, preferably 12mm.
[0056] The air pressure of the aforementioned gear pump is 0.2 MPa to 0.7 MPa, preferably 0.4 MPa to 0.6 MPa.
[0057] The aforementioned laser module cutting involves cutting the shoe opening edge into different arcs; it also involves cutting an opening along the shoe opening edge to make the opening wider, which is beneficial for feet with thick insteps; and it involves cutting small holes of different shapes on the shoe upper. This allows for the insertion of shoelaces or elastic bands, making the shoe upper fit the foot more snugly.
[0058] The sole 52 is a composite sole 52 consisting of an EVA foam sole 52 and a rubber sole 52. The toe area of the sole 52 in contact with the upper is made of rubber, while the other areas in contact with the upper are made of EVA foam sole 52. The height of the area of the sole 52 in contact with the upper is 5mm. The toe area of the sole 52 in contact with the upper is treated with a rubber treatment agent containing 1.1% (mass fraction) of B powder, and the EVA foam sole 52 in contact with the upper is treated with a non-irradiated treatment agent. Then, the composite sole 52 is placed on the production line and dried at 50°C. Next, glue is applied to the area in contact with the upper and dried. Finally, the composite sole 52 is installed onto the shoe last 51. Before spraying the shoe, the spray gun 43 sprays hot air at 60°C onto the area of the sole 52 in contact with the upper.
[0059] After step five is completed, the complete shoe is obtained, with the upper and sole 52 glued together.
[0060] The above are merely specific embodiments of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept shall be considered as infringing upon the protection scope of the present invention.
Claims
1. A method for textileing multi-color thermosetting shoe uppers, characterized in that, Includes the following steps: Step 1: Add isocyanate raw material A into the first heat preservation device and keep it warm until the isocyanate is in liquid form; Step 2: Add the polyol raw material B into the second heat preservation device and keep it warm until the polyol is in liquid form; Step 3: The isocyanate liquid from Step 1 and the polyol from Step 2 are respectively transported to the front end of the spraying assembly one through a gear pump and conveyed through an insulated conveying pipe for uniform mixing, ready for spraying. Step 4: Load the colored curing agent into the storage device connected to the spraying assembly 2. The curing agent is a polyamine catalyst. The solution temperature of the curing agent is 70℃-100℃, ready for spraying. Step 5: The control module sends a command to the robotic arm to grab the shoe last with the sole on the bottom and move it to the vicinity of the spraying component. The robotic arm can drive the shoe last to rotate in multiple directions. Step 6: The control module sends a command, and the spraying components 1 and 2 cooperate with the robotic arm to spray around the shoe last. The spraying component 1 sprays one longitudinal weave line and at least two transverse weave lines simultaneously. The transverse weave lines intersect with the longitudinal weave lines simultaneously. The spraying component 2 sprays the curing agent onto the weave lines simultaneously. The curing agent accelerates the curing and molding of the raw material. During the spraying process, the control module sends a command to the switcher, and the switcher changes the spraying pressure to form a gradient color. Step 7: 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, the robotic arm puts the sole into the cavity, and the instrument automatically identifies the size, matches the stored information, selects the trimming position, and cuts.
2. The method for textileizing multi-color thermosetting shoe uppers as described in claim 1, characterized in that: The polyol is a polyester diol and / or a polyether diol.
3. The method for textileizing multi-color thermosetting shoe uppers as described in claim 1, characterized in that: The isocyanate is an aliphatic diisocyanate and / or an aromatic diisocyanate.
4. The method for textileing multi-color thermosetting shoe uppers as described in claim 1, characterized in that: The atomizing assembly includes a longitudinal nozzle and at least two transverse nozzles. The nozzle has a spray hole at its axis for atomizing. Multiple air holes are distributed around the spray hole. The axis of the air holes is not parallel to the axis of the spray hole. Air is ejected from the air holes, causing the polymer flowing out of the spray hole to be in a strip or spiral shape. The atomizing device simultaneously ejects at least two transverse threads from at least two holes to form a webbing with a width of 0.5 mm to 20 mm.
5. The method for textileizing multi-color thermosetting shoe uppers as described in claim 1, characterized in that: The laser module cutting involves cutting the shoe opening edge into different arcs, cutting an opening along the shoe opening edge, and cutting small holes of different shapes on the shoe surface.
6. The method for textileizing a multi-color thermosetting shoe upper as described in claim 1, characterized in that: The area of the sole that comes into contact with the upper needs to undergo surface treatment to form an adhesive bonding surface.
7. The method for textileing multi-color thermosetting shoe uppers as described in claim 1, characterized in that: The height of the sole area in contact with the upper is 3mm-15mm.