Uppers hot-pressing mould and hot-pressing forming process

Abstract

The present application belongs to the technical field of shoemaking, and particularly relates to a vamp hot-pressing mold and a hot-pressing forming process. The vamp hot-pressing mold comprises a lower mold block and an upper mold block, and the lower mold block and the upper mold block are oppositely arranged in a first direction. The lower mold block has a supporting part, and the supporting part has a plurality of curved surface parts. Adjacent two curved surface parts are smoothly and transitionally connected, so that the vamp is attached to the supporting part and is in an unfolded state. The upper mold block has a pressing part which is matched with the supporting part. The vamp hot-pressing mold disclosed by the present application can realize three-dimensional hot-pressing of the vamp, improve the hot-pressing efficiency of the patch and the vamp base material, and reduce the labor intensity and resource waste.

Description

Technical Field

[0001] This invention belongs to the field of shoemaking technology, specifically relating to a hot pressing mold for shoe uppers and a hot pressing molding process. Background Technology

[0002] In related technologies, film patches are applied to shoe upper substrates using planar hot pressing to bond the film patches to the shoe upper substrate. Specifically, the film patches are placed on a planar hot press while the shoe upper is in a flat state. The planar hot press consists of an upper module and a lower module. Both the upper and lower modules have high surface temperatures (used to heat the film patches during pressing, thereby ensuring that the film patches can fully bond with the shoe upper substrate). The upper module has a downward pressing stroke, and the lower module is used to place the shoe upper substrate.

[0003] However, when the shoe upper is in a flat state, some parts of the shoe upper will overlap, and because there is a certain curvature at the connection points of different parts of the shoe upper, multiple hot pressings are required for each location, resulting in a waste of human and material resources and low production efficiency. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of the present invention propose a hot pressing mold for shoe uppers, which can realize three-dimensional hot pressing of shoe uppers, improve the hot pressing efficiency of film patches and shoe upper substrates, and reduce labor intensity and resource waste.

[0006] An embodiment of the present invention also proposes a hot pressing molding process for shoe uppers.

[0007] According to an embodiment of the present invention, a shoe upper hot pressing mold includes a lower module and an upper module, wherein the lower module and the upper module are disposed opposite to each other in a first direction;

[0008] The lower module has a support portion, which has a three-dimensional surface area. The three-dimensional surface area is used to support the shoe upper so that the shoe upper is attached to the support portion and is in an unfolded state.

[0009] The upper module has the pressing part, which matches the supporting part.

[0010] The shoe upper hot pressing mold of the present invention can realize three-dimensional hot pressing of shoe uppers, improve the hot pressing efficiency of film patches and shoe upper substrates, and reduce labor intensity and waste of resources.

[0011] In some embodiments, the three-dimensional surface region includes multiple curved surface portions, with adjacent curved surface portions smoothly transitioning and connected. The curved surface portions include a first curved surface, a second curved surface, a third curved surface, and a fourth curved surface.

[0012] The first curved surface is fitted to the toe portion of the shoe upper;

[0013] The second curved surface is fitted to the inner waist portion of the shoe upper, and the third curved surface is fitted to the outer waist portion of the shoe upper.

[0014] The fourth curved surface corresponds to and fits the two upper parts of the shoe upper, and the two upper parts are spaced apart on the fourth curved surface.

[0015] In some embodiments, the first curved surface is disposed at one end of the support portion, the second curved surface and the third curved surface are located behind the first curved surface and respectively disposed on both sides of the first curved surface, and the fourth curved surface is located between the second curved surface and the third curved surface; and / or

[0016] The curved surface portion includes a first transition surface, which is disposed between the first surface and the second and third surfaces, and the first transition surface is a concave surface; and / or

[0017] The curved surface portion includes a second transition surface, which is located in the middle of the support portion and is connected to the first, second, third, and fourth curved surfaces.

[0018] In some embodiments, the lower module is provided with a limiting part, which is located in the circumference of the support part and has a limiting surface facing the support part for positioning the shoe upper.

[0019] In some embodiments, the upper module has a protrusion, and the pressing portion is located on the protrusion, such that when the support portion and the pressing portion are thermally pressed together, there is a gap between the upper module and the limiting portion; and / or

[0020] The limiting part is arranged circumferentially along the support part and protrudes from the lower module to form a groove on the lower module, and the side wall surface of the groove is the limiting surface.

[0021] In some embodiments, the system further includes a protruding shape and a recessed shape, the protruding shape being disposed on one of the lower module and the upper module, and the recessed shape being disposed on the other of the lower module and the upper module; and / or

[0022] The angle between the tangent plane of the curved surface in the support portion and the first direction is greater than a first threshold.

[0023] The hot pressing device of this invention includes the shoe upper hot pressing mold described in any of the above-mentioned embodiments.

[0024] The shoe upper hot pressing molding process of this invention, which utilizes the shoe upper hot pressing mold or the hot pressing device described above for three-dimensional hot pressing of the shoe upper, includes the following steps:

[0025] The patch is fixed to the shoe upper substrate;

[0026] Place the shoe upper substrate with the patch fixed on it on the lower module, and make the patch and the shoe upper substrate in an unfolded state;

[0027] The upper module is aligned and engaged with the lower module to heat and press the patch and the shoe upper substrate together.

[0028] In some embodiments, heating and pressing the patch and the shoe upper substrate includes:

[0029] Adjust the heating temperature to a second threshold, which is greater than the activation temperature of the adhesive film between the patch and the shoe upper substrate;

[0030] Adjust the pressing pressure to the third threshold;

[0031] Maintain continuous pressing time until the fourth threshold.

[0032] In some embodiments, fixing the patch to the shoe upper substrate involves using a hot melt gun to fix the patch at specific points on the shoe upper substrate, so that the patch is accurately positioned on the shoe upper substrate; and / or

[0033] It also includes an elastic pad, which is provided on the lower module and / or the upper module, and the elastic pad is fitted onto the support portion of the lower module and / or the pressing portion of the upper module; and / or

[0034] The second threshold T satisfies: 5℃ ≤ T - T0 ≤ 15℃, where T0 is the film activation temperature; and / or

[0035] The third threshold P satisfies: 75PSI≤P≤100PSI; and / or

[0036] The fourth threshold t satisfies: 30s≤t≤50s. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of the shoe upper hot pressing mold according to an embodiment of the present invention.

[0038] Figure 2 This is a schematic diagram of the lower module in an embodiment of the present invention.

[0039] Figure 3 This is a schematic diagram of the upper module in an embodiment of the present invention.

[0040] Figure 4This is a front view structural diagram of the shoe upper in the shoe upper hot pressing mold in an embodiment of the present invention.

[0041] Figure 5 This is a side view of the shoe upper in the shoe upper hot pressing mold in an embodiment of the present invention.

[0042] Figure 6 yes Figure 4 Cross-sectional view of the structure along the AA direction.

[0043] Figure 7 yes Figure 4 Cross-sectional view of the structure along the BB direction.

[0044] Figure label:

[0045] 100. Shoe upper hot pressing mold;

[0046] 1. Lower module; 11. Support section; 111. First surface; 112. Second surface; 113. Third surface; 114. Fourth surface; 115. First transition surface; 116. Second transition surface;

[0047] 2. Upper module; 21. Pressing section;

[0048] 31. Settling groove; 32. Protrusion. Detailed Implementation

[0049] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0050] like Figures 1-7 As shown, the shoe upper hot pressing mold 100 according to an embodiment of the present invention includes a lower module 1 and an upper module 2, which are disposed opposite to each other in a first direction. The first direction is the up-down direction shown in the figure.

[0051] The lower module 1 has a support part 11, which has a three-dimensional surface area. The three-dimensional surface area is used to support the shoe upper so that the shoe upper is attached to the support part 11 and is in an unfolded state. The upper module 2 has a pressing part 21, which matches the support part 11.

[0052] It should be understood that in order to ensure that the upper fits the foot better after molding, the upper is formed by multiple smooth transitions of curved surfaces, thereby ensuring a good fit and comfort. When the upper is unfolded, due to the different curvatures of different parts of the upper, the different curvature parameters of different parts of the upper, and the different bending arcs of adjacent parts, there are overlapping areas in the unfolded upper, that is, wrinkles will occur in some areas. If the entire upper is hot-pressed, the corresponding areas will not be able to bond fully. Therefore, related technologies require hot-pressing multiple areas separately. Hot-pressing efficiency is low, and there are many adjustments, which wastes human resources and also requires the hot-pressing equipment to be continuously heated to maintain the temperature.

[0053] The support part 11 of this embodiment adopts a three-dimensional structure. Different parts of the three-dimensional surface area can correspond to the toe, inner waist, outer waist and upper of the shoe. When the shoe is attached to the support part 11, the shoe is in an unfolded state. In the unfolded state, the shoe does not overlap in the first direction and there are no wrinkles.

[0054] The support part is convex and is located on the lower module, while the pressing part is concave and is located on the upper module. The end face of the pressing part 21 of the upper module 2 engages with the end face of the support part 11 of the lower module 1. When the upper module 2 and the lower module 1 are fitted together, the shoe upper attached to the lower module 1 can be pressed together.

[0055] When the upper module 2 and the lower module 1 are pressed together, each part of the shoe upper can withstand the pressure in the first direction. That is to say, while ensuring that each part of the shoe upper is unfolded, the support part 11 makes the unfolded shoe upper more gentle relative to the plane perpendicular to the first direction, so that the upper module 2 and the lower module 1 can fully press the shoe upper together.

[0056] The shoe upper hot pressing mold 100 of this invention can realize three-dimensional hot pressing of shoe uppers, improve the hot pressing efficiency of patches and shoe upper substrates, and reduce labor intensity and resource waste. The patches are heat-cut film patches, for example, patches made of thermoplastic polyurethane rubber.

[0057] In some embodiments, the three-dimensional surface region includes multiple curved surface portions, with adjacent curved surface portions smoothly transitioning and connected. The curved surface portions include a first curved surface 111, a second curved surface 112, a third curved surface 113, and a fourth curved surface 114. The first curved surface 111 corresponds to and fits the toe portion of the shoe upper, the second curved surface 112 corresponds to and fits the inner waist portion of the shoe upper, the third curved surface 113 corresponds to and fits the outer waist portion of the shoe upper, and the fourth curved surface 114 corresponds to and fits the two upper portions of the shoe upper, with the two upper portions spaced apart on the fourth curved surface 114.

[0058] It should be noted that in this embodiment of the invention, the curved surface portion on the support part 11 is divided into regions, thereby allowing for targeted parameter design for different curved surfaces. This enables the upper and the support part 11 to fit together better. Based on the curved surface characteristics of each part of the upper, including the toe, inner waist, outer waist, and upper, as well as the curvature between adjacent parts, the curved surface portion on the mold is adjusted. When the upper is attached to the support part 11, the two upper parts on the upper do not overlap. Especially for mid-to-high-top uppers, the reasonable arrangement of the fourth curved surface 114 can avoid interference from overlapping uppers.

[0059] In some embodiments, a first curved surface 111 is disposed at one end of the support portion 11, a second curved surface 112 and a third curved surface 113 are located behind the first curved surface 111 and are respectively disposed on both sides of the first curved surface 111, and a fourth curved surface 114 is located between the second curved surface 112 and the third curved surface 113.

[0060] It should be understood that the shoe upper has a front-back direction and a left-right direction. The first curved surface 111 is located at the front end of the support part 11 in the front-back direction. The second curved surface 112 and the third curved surface 113 are located behind the first curved surface 111 in the front-back direction and unfold relative to the first curved surface 111 in the left-right direction. The fourth curved surface 114 is connected to the second curved surface 112 and the third curved surface 113 and is located between the third curved surface 113 and the fourth curved surface 114.

[0061] Furthermore, the curved surface portion includes a first transition surface 115, which is located between the first curved surface 111 and the second curved surface 112 and the third curved surface 113. The first transition surface 115 is a concave surface. It should be understood that when the second curved surface 112 and the third curved surface 113 are unfolded in the left-right direction relative to the first curved surface 111, the bending positions between the first curved surface 111 and the second curved surface 112 and the third curved surface 113 are concave, requiring a transition through a concave surface to ensure that the corresponding bending positions do not wrinkle.

[0062] Furthermore, the curved surface portion includes a second transition surface 116, which is located in the middle of the support portion 11. The second transition surface 116 connects to the first curved surface 111, the second curved surface 112, the third curved surface 113, and the fourth curved surface 114. It should be understood that the middle of the shoe upper has a gap, and the second transition surface 116 ensures the continuity of the support portion 11, enabling the support portion 11 to form a smooth and continuous curved surface structure. This also improves the pressing effect during the hot pressing process. The second transition surface 116 is a convex surface, which can play a positioning role when the upper module 2 and the lower module 1 are pressed together.

[0063] In some embodiments, the lower module 1 is provided with a limiting part, which is located circumferentially to the support part 11. The limiting part has a limiting surface facing the support part 11 and is used to position the shoe upper. In order to improve the positioning accuracy between the shoe upper and the support part 11 and to improve the work efficiency and convenience when the shoe upper is attached to the lower module 1, a limiting part is provided on the lower module 1. The limiting part can be a plurality of limiting blocks protruding from the lower module 1, or a groove can be provided on the lower module 1 to arrange the support part 11 in the groove.

[0064] Furthermore, the limiting part is provided along the circumference of the support part 11 and protrudes from the lower module 1 to form a groove 31 on the lower module 1, and the side wall surface of the groove 31 serves as the limiting surface. In other words, a limiting surface is formed in the circumference of the support part 11. When the shoe upper is attached to the support part 11, the circumference of the shoe upper abuts against the limiting surface, thereby enabling precise positioning of the shoe upper and preventing the shoe upper from shifting during the hot pressing process.

[0065] Furthermore, the upper module 2 has a protrusion 32, and the pressing part 21 is located on the protrusion 32, so that when the support part 11 and the pressing part 21 are thermally pressed together, there is a gap between the upper module 2 and the limiting part. It should be understood that when the upper module 2 and the lower module 1 are pressed together, the limiting part does not restrict the upper module 2 from moving downward relative to the lower module 1. The protrusion can compensate for the height of the limiting part in the first direction and avoid interference between the upper module 2 and the lower module 1.

[0066] In some embodiments, the shoe upper hot pressing mold 100 further includes a shaping protrusion and a shaping groove, the shaping protrusion being disposed on one of the lower module 1 and the upper module 2, and the shaping groove being disposed on the other of the lower module 1 and the upper module 2.

[0067] It should be noted that when the shoe upper has three-dimensional textures or shapes, the corresponding mold can also be set with protrusions and grooves for pressing the three-dimensional textures and shapes. The high temperature during the hot press process causes the shoe upper substrate and patch to deform and form a three-dimensional shape after cooling. The structure and arrangement of the corresponding protrusions and grooves are set according to the actual production needs.

[0068] In some embodiments, the angle between the tangent plane of the curved surface in the support portion 11 and the first direction is greater than a first threshold. It should be understood that if the angle between the tangent plane of the curved surface and the first direction is greater than the first threshold, it can ensure that the corresponding position has an effective pressing force when the upper module 2 and the lower module 1 are hot-pressed together. The larger the angle between the tangent plane of the curved surface and the first direction, the more gentle the corresponding position is relative to the plane perpendicular to the first direction, which is more conducive to improving the hot-pressing effect.

[0069] The first threshold can be between 30° and 50°. The value of the first threshold can be reasonably controlled according to the different products and the different positions of the patch on the shoe upper substrate to ensure that the patch and the shoe upper substrate can be fully pressed together. For example, the value of the first threshold can be 30°, 36°, 41°, 45° or 50°. When designing the three-dimensional surface area, the angle between the tangent plane of each curved surface and the first direction is greater than the corresponding first threshold. When the angle between the tangent plane of the curved surface and the first direction is less than the first threshold, the corresponding tangent plane will be closer to being parallel to the first direction. This will make it easier for the patch to shift position on the shoe upper substrate when the upper and lower modules are pressed together.

[0070] When the value of the first threshold is too large and exceeds 50°, it can easily lead to increased difficulty in mold design, make it difficult to unfold the upper in three dimensions, and cause local areas to separate from the lower module, resulting in poor fit.

[0071] In this embodiment of the invention, the upper module 2 and the lower module 1 can fully press the shoe upper together. The mold adopts a relatively flat shape to prevent the shoe upper from overlapping and to achieve the purpose of three-dimensional shaping. The mold parameters are determined according to the shape of the shoe upper, the height of the instep and the upper, and the curvature of the bending position of the shoe upper, so as to achieve the pressing state of the upper and lower molds, which can fully contact and act on the substrate and patch of the shoe upper.

[0072] In this embodiment of the invention, the shoe upper can be in a three-dimensional state during the hot pressing process, without substrate overlap. Thus, the hot pressing surface of the upper module 2 can cover the shoe upper in one go, completing the overall hot pressing of the shoe upper in one go.

[0073] The hot pressing device of this invention includes the shoe upper hot pressing mold 100 of any of the above-mentioned embodiments. The hot pressing device includes equipment such as a hot press machine, which can provide pressing force to the upper module 2 and the lower module 1 during shoe upper hot pressing, and can also heat the upper module 2 and the lower module 1.

[0074] The shoe upper hot pressing molding process of this invention, which utilizes any of the above-mentioned shoe upper hot pressing molds or the above-mentioned hot pressing devices to perform three-dimensional hot pressing of the shoe upper, includes the following steps:

[0075] S101. Fix the patch to the shoe upper substrate.

[0076] Specifically, devices such as hot melt guns and laser guns can be used to fix the patch at fixed points on the shoe upper substrate to ensure accurate positioning of the patch on the shoe upper substrate. By fixing the patch at multiple points with hot melt, it is possible to prevent the patch from shifting relative to the shoe upper substrate and improve the hot pressing effect.

[0077] S102. Place the shoe upper substrate with the patch fixed on it onto the lower module, and ensure that the patch and the shoe upper substrate are in an unfolded state. When attaching the shoe upper substrate to the lower module, adjust the position of the shoe upper substrate to ensure that it is in an unfolded state. At this time, both the shoe upper substrate and the patch are in a three-dimensional unfolded state. When the patch and the shoe upper substrate are subjected to the force in the first direction, they can achieve stable and effective pressing.

[0078] S103. Align the upper module with the lower module to heat and press the patch and the upper substrate together. The lower module remains stationary, while the upper module gradually moves closer to the lower module in the first direction and presses the upper substrate and patch together. This can be achieved by heating the upper and lower modules to a preset temperature. During the pressing process, the adhesive film between the patch and the upper substrate is activated, thus bonding the patch and the upper substrate together.

[0079] In some embodiments, elastic pads are provided on the lower module and / or the upper module, and the elastic pads are attached to the support portion of the lower module and / or the pressing portion of the upper module. Silicone pads can be used as elastic pads. During the hot pressing process, the thermal conductivity and elasticity of the silicone pads fully activate the adhesive film and thermally fuse the patch and the shoe upper substrate together.

[0080] In some embodiments, heating and pressing the patch and the upper substrate includes:

[0081] S201. Adjust the heating temperature to the second threshold, which is greater than the activation temperature of the adhesive film between the patch and the shoe upper substrate, to ensure that the adhesive film can be fully activated.

[0082] S202. Adjust the pressing pressure to the third threshold to provide pressing force between the patch and the shoe upper substrate, thereby improving the quality and stability of the shoe upper after hot melting.

[0083] S203. Maintain continuous pressing time until the fourth threshold. Sufficient pressing time allows the adhesive film between the patch and the upper substrate to be fully activated, ensuring that the patch and the upper substrate are thermally fused together under the action of the activated adhesive film.

[0084] Furthermore, the second threshold T satisfies: 5℃≤T-T0≤15℃, where T0 is the activation temperature of the adhesive film. That is, the heating temperature is 5℃ to 15℃ higher than the activation temperature of the adhesive film. For example, the second threshold T is T0+5℃, T0+8℃, T0+10℃, T0+11.5℃, or T0+15℃. When the second threshold T is less than T0+5℃, the adhesive film is easily not fully activated, requiring a longer activation time and affecting production efficiency. When the second threshold T is greater than T0+15℃, the patch, adhesive film, and shoe upper substrate are easily damaged due to excessively high temperature.

[0085] Furthermore, the third threshold P satisfies: 75PSI≤P≤100PSI. For example, the third threshold P is 75PSI, 78PSI, 80PSI, 86PSI, 95PSI, or 100PSI. When the third threshold P is less than 75PSI, it is easy to cause unreliable welding between the shoe upper substrate and the patch. When the third threshold P is greater than 100PSI, it is easy to damage the patch and the shoe upper substrate, affecting the quality of the product.

[0086] Furthermore, the fourth threshold t satisfies: 30s≤t≤50s. Based on the design parameters of heating temperature and pressing pressure, the hot pressing time can be controlled within a certain range, improving production efficiency and quality. The value of the fourth threshold t can be 30s, 32s, 36s, 42s, or 50s. When the fourth threshold is less than 30s, it is easy to cause insufficient activation of the adhesive film. When the fourth threshold is greater than 50s, it is easy to cause low production efficiency.

[0087] In this embodiment of the invention, by comprehensively considering the parameters of hot pressing temperature, pressing pressure and pressing time, the welding effect between the patch and the shoe upper substrate is improved. Compared with the hot pressing process in related technologies, this improves production efficiency, reduces human resource costs, reduces the heat demand in the production of a single shoe upper, and improves energy utilization.

[0088] In this embodiment of the invention, by setting a three-dimensional shoe upper hot pressing mold, the shoe upper can be hot-pressed as a whole in one go, which simplifies the operation process, improves production efficiency, and reduces the energy consumption of the hot press.

[0089] In the embodiment of the present invention, during the hot pressing process using a three-dimensional shoe upper hot pressing mold, the shoe upper substrate and patch can be shaped by setting the shaped protrusions and shaped grooves, thereby achieving the function of manufacturing three-dimensional shapes and textures.

[0090] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0091] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0092] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0093] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0094] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0095] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A hot pressing mold for shoe uppers, characterized in that, It includes a lower module and an upper module, which are arranged opposite to each other in a first direction; The lower module has a support portion, which has a three-dimensional surface area. The three-dimensional surface area is used to support the shoe upper so that the shoe upper is attached to the support portion and is in an unfolded state. The upper module has a pressing part that matches the supporting part; The three-dimensional surface region includes multiple curved surface portions, with adjacent curved surface portions smoothly transitioning and connected. The curved surface portions include a first curved surface, a second curved surface, a third curved surface, and a fourth curved surface. The first curved surface is fitted to the toe portion of the shoe upper; The second curved surface is fitted to the inner waist portion of the shoe upper, and the third curved surface is fitted to the outer waist portion of the shoe upper. The fourth curved surface is fitted to the two upper parts of the shoe upper, and the two upper parts are spaced apart on the fourth curved surface; The first curved surface is located at one end of the support portion, the second curved surface and the third curved surface are located behind the first curved surface and respectively located on both sides of the first curved surface, and the fourth curved surface is located between the second curved surface and the third curved surface; The curved surface portion includes a first transition surface, which is located between the first surface and the second and third surfaces, and the first transition surface is a concave surface. The curved surface portion includes a second transition surface, which is located in the middle of the support portion. The second transition surface is connected to the first, second, third, and fourth curved surfaces, and is a convex surface.

2. The shoe upper hot pressing mold according to claim 1, characterized in that, The lower module is provided with a limiting part, which is located around the support part and has a limiting surface facing the support part for positioning the shoe upper.

3. The shoe upper hot pressing mold according to claim 2, characterized in that, The upper module has a protrusion, and the pressing part is located on the protrusion, so that when the supporting part and the pressing part are thermally pressed together, there is a gap between the upper module and the limiting part; The limiting part is arranged circumferentially along the support part and protrudes from the lower module to form a groove on the lower module, and the side wall surface of the groove is the limiting surface.

4. The shoe upper hot pressing mold according to any one of claims 1 to 3, characterized in that, It also includes shaped protrusions and shaped grooves, the shaped protrusions being disposed on one of the lower module and the upper module, and the shaped grooves being disposed on the other of the lower module and the upper module.

5. A hot pressing device, characterized in that, Includes the shoe upper hot pressing mold as described in any one of claims 1 to 4.

6. A hot-pressing molding process for shoe uppers, characterized in that, Performing three-dimensional hot pressing of the shoe upper using any one of the shoe upper hot pressing molds according to claims 1 to 4 or the hot pressing device according to claim 5 includes the following steps: The patch is fixed to the shoe upper substrate; Place the shoe upper substrate with the patch fixed on it on the lower module, and make the patch and the shoe upper substrate in an unfolded state; The upper module is aligned and engaged with the lower module to heat and press the patch and the shoe upper substrate together.

7. The hot pressing molding process for shoe uppers according to claim 6, characterized in that, The heating and pressing of the patch and the shoe upper substrate includes: Adjust the heating temperature to a second threshold, which is greater than the activation temperature of the adhesive film between the patch and the shoe upper substrate; Adjust the pressing pressure to the third threshold; Maintain continuous pressing time until the fourth threshold.

8. The hot pressing molding process for shoe uppers according to claim 7, characterized in that, The process of fixing the patch to the shoe upper substrate involves using a hot melt gun to fix the patch at specific points on the shoe upper substrate, ensuring accurate positioning of the patch on the shoe upper substrate; and / or It also includes an elastic pad, which is provided on the lower module and / or the upper module, and the elastic pad is fitted onto the support portion of the lower module and / or the pressing portion of the upper module; and / or The second threshold T satisfies: 5℃ ≤ T - T0 ≤ 15℃, where T0 is the film activation temperature; and / or The third threshold P satisfies: 75PSI≤P≤100PSI; and / or The fourth threshold t satisfies: 30s≤t≤50s.

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