Combined forming process, footwear component, and shoe

Abstract

The present invention relates to the technical field of footwear component production processes, and disclosed are a combined forming process, a footwear component, and a shoe. The combined forming process comprises: providing a forming mold, a first foaming material, an upper panel, an upper collar, and a sole wrap, wherein the forming mold comprises a first upper mold and a first lower mold, the first upper mold is provided with a first upper forming surface and a first sole forming surface, and the first lower mold is provided with a second upper forming surface and a second sole forming surface; fitting the upper panel to the first upper forming surface and the first sole forming surface; performing forming processing on the upper collar, such that a reinforcement layer is attached to the upper collar; correspondingly fitting the upper collar to the second upper forming surface, and correspondingly fitting the sole wrap to the second sole forming surface; adding the first foaming material to the first lower mold, and closing the first upper mold and the first lower mold; and after pressure holding for a first preset time, separating the first upper mold from the first lower mold to obtain an upper and sole combination. An upper and a sole are integrally formed, taking into account both the elasticity of the sole and the supporting performance of the upper.

Description

Combined molding process, footwear accessories and shoes Technical Field

[0001] The invention relates to the technical field of shoe accessories production technology, in particular to a combined molding process, shoe accessories and shoes. Background Art

[0002] The heel of a shoe is a crucial component, providing support and wrapping for the heel, enhancing the user experience and protecting the foot. Traditionally, the heel is often sewn together, creating seams at the joints between the sheets, which can easily cause scratches and complicate the production process.

[0003] In the current shoemaking process, the sole and upper are mostly formed separately and then connected into one through bonding, sewing and other connection methods. This easily complicates the shoemaking process and the connection stability between the sole and the upper is poor. After long-term wear, the connection between the sole and the upper is prone to problems such as debonding and loose sewing threads.

[0004] In the related art, some rubber shoes are prepared using a foaming molding process so that the sole, fore and back of the shoe are formed at one time and connected as one. However, this process is only applicable to rubber shoes and is difficult to meet the production needs of sports shoes, leather shoes and other shoes. In addition, this process is difficult to take into account both the elasticity of the sole and the support of the upper.

[0005] Summary of the Invention

[0006] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention proposes a combined molding process, which is conducive to realizing the integral molding of the upper and the sole, and takes into account the elasticity of the sole and the support of the upper.

[0007] The present invention also provides a footwear accessory.

[0008] The present invention also provides a pair of shoes.

[0009] The combined molding process according to the first embodiment of the present invention includes: providing a molding mold, a first foaming material, an upper shoe piece, an upper panel, and a sole panel, the molding mold including a first upper mold and a first lower mold, the parting surface of the first upper mold including a first upper molding surface and a first sole molding surface connected thereto, and the parting surface of the first lower mold including a second upper molding surface and a second sole molding surface connected thereto;

[0010] Laminating the upper shoe piece to the first upper molding surface and the first sole molding surface;

[0011] Performing a shaping process on the upper panel so that the upper panel is attached with a reinforcement layer;

[0012] Lay the upper piece against the second upper molding surface, and lay the sole piece against the second sole molding surface, connecting the rear edge of the sole piece to the lower edge of the upper piece;

[0013] Adding a first foaming material into a first lower mold, closing the first upper mold and the first lower mold to form a mold cavity, and foaming the first foaming material in the mold cavity;

[0014] After holding the pressure for a first preset time, the first upper mold and the first lower mold are separated to obtain a combination of the shoe upper and the sole.

[0015] The combined molding process according to the embodiment of the present invention has at least the following beneficial effects: during production, workers can mold the upper piece so that the upper piece is attached with a reinforcement layer to enhance the hardness of the upper piece, and place the upper piece corresponding to the second upper molding surface. The upper piece is set corresponding to the upper, which is beneficial to enhancing the wrapping and support performance of the human heel, and the sole piece is placed corresponding to the second sole molding surface. The rear edge of the sole piece is connected to the lower edge of the upper piece, and the upper shoe piece is attached to the first upper molding surface and the first sole molding surface. Then, the first foaming material can be added to the first lower mold. When the first upper mold and the first lower mold are docked and the mold is closed, the first upper molding surface and the second upper molding surface are arranged opposite to each other for molding the upper, and the first sole molding surface and the second sole molding surface are arranged opposite to each other for forming the sole. The first upper mold and the first lower mold jointly form a mold cavity, and the first foaming material is foamed in the mold cavity. The foam molding is beneficial to forming the upper shoe piece into a shape and structure that is compatible with the first upper molding surface and the first sole molding surface, the upper surrounding piece into a shape and structure that is compatible with the second upper molding surface, and the sole surrounding piece into a shape and structure that is compatible with the second sole molding surface under the expansion action of the first foaming material, and the first foaming material fills the entire mold cavity, and the adhesive layer formed by the first foaming material is sandwiched between the upper shoe piece, the upper surrounding piece and the sole surrounding piece, so that the molded upper and the sole are connected as one. That is, the upper and the sole are integrally molded as a component, which is beneficial to improving the connection stability between the upper and the sole. Compared with the method of making the upper and the sole separately and then connecting them, it is beneficial to simplify the shoemaking process and improve production efficiency. Moreover, under the reinforcement action of the reinforcement layer, the hardness of the upper is made greater than the hardness of the sole, so as to realize the supporting performance of the upper for the human heel and maintain the elasticity of the sole, and it is more applicable to various shoes.

[0016] According to some embodiments of the present invention, the shoe upper panel is subjected to a molding process, including:

[0017] A second upper mold, a second lower mold and a second foaming material are provided, wherein the parting surface of the second upper mold is provided with a third upper molding surface, and the parting surface of the second lower mold is provided with a fourth upper molding surface;

[0018] Laminating the upper piece to the fourth upper forming surface;

[0019] Adding a second foaming material above the upper panel, closing the second upper mold and the second lower mold to enclose a molding cavity, and foaming the second foaming material in the molding cavity;

[0020] After holding the pressure for a second preset time, the second upper mold is separated from the second lower mold.

[0021] Specifically, the second upper mold is provided with a third upper molding surface, and the second lower mold is provided with a fourth upper molding surface. The fourth upper molding surface is adapted to the third upper molding surface, and the upper panel is fitted on the fourth upper molding surface, and the second foaming material is added above the upper panel. The second upper mold and the second lower mold are closed to allow the second foaming material to foam and be connected to the upper panel as a whole. Under the limiting effect of the mold cavity, the second foaming material is foamed and forms a reinforcement layer attached to the surface of the upper panel. Under the connecting effect of the reinforcement layer, the upper panel has a concave three-dimensional shape, so as to improve the adaptability of the upper panel to the second upper molding surface, which is conducive to achieving comprehensive fitting and adaptation of the upper panel to the second upper molding surface, and cooperating with the third upper mold. Under the expansion action of the first foam material, the upper piece is formed into a shape and structure that is compatible with the second upper molding surface, and under the connecting action of the first foam material, the upper piece and the sole piece are connected as a whole, which is beneficial to improving the integrity of the upper and the sole. The reinforcement layer formed by the second foam material is beneficial to enhancing the protection and support performance of the upper for the human heel, and the glue layer formed by the first foam material makes the inner layer of the upper and the sole softer, so as to improve the user's wearing comfort. This combined molding process foams the upper piece to form a hardness difference between the upper piece and the sole piece, and connects them as a whole under the connecting action of the first foam material, thereby taking into account both the elasticity of the sole and the support of the upper.

[0022] According to some embodiments of the present invention, the second upper mold or the second lower mold includes a shell and a mold core, the shell is provided with a recessed accommodating groove, the mold core is detachably connected to the shell, the mold core is adapted to the accommodating groove, and the mold core can be embedded and connected to the accommodating groove.

[0023] Taking into account that the traditional mold is a whole piece of mold steel material and is finely produced by metal processing machines, the fine processing time of the traditional mold is long, which will lead to high mold opening costs, and the molds obtained by ordinary metal processing machines are difficult to meet the molding requirements of some shoe uppers with more complex structures and shapes. The second upper mold or the second lower mold includes a shell and a mold core. The mold core can be detachably connected to the receiving groove of the shell. When the mold core is assembled with the shell, the mold core is embedded in the receiving groove. The second lower mold can be used for the foaming molding process. The worker can cover the upper piece on the top of the mold core. With the expansion of the second foaming material, the upper piece fits with the fourth upper molding surface, thereby The shoe upper piece is formed into a shape and structure that is compatible with the fourth shoe upper forming surface, which is beneficial to making the surface shape and structure of the shoe upper piece after forming more consistent with the fourth shoe upper forming surface and more accurate. When the shape and structure of the shoe back upper need to be changed, the mold core can be redesigned and molded, and the newly designed mold core can be assembled with the shell, which can be used for the production of the new shoe back upper, which is beneficial to reducing the processing time and mold opening cost of the second upper mold or the second lower mold. In addition, the mold core is designed and manufactured separately, which is beneficial to reducing the interference of the shell on mechanical processing, thereby making the structure and shape of the mold core more flexible to meet the molding requirements of shoe backs of various structures and shapes.

[0024] According to some embodiments of the present invention, the second lower mold is also provided with a first air exhaust channel, the fourth upper molding surface is provided with multiple first air suction holes, one end of the first air exhaust channel is connected to the first air suction holes, and the other end of the first air exhaust channel is provided with a first air exhaust port.

[0025] The first air suction port can be connected to an external air pump through a hose, so that the first air suction hole generates negative pressure, so that the upper piece is tightly attached to the fourth upper molding surface, and cooperates with the expansion of the second foaming material to form a shape and structure that is compatible with the fourth upper molding surface. The negative pressure suction method is conducive to making the surface shape and structure of the upper piece after molding more consistent with the fourth upper molding surface, with higher accuracy, and avoiding the problem of wrinkles on the surface of the upper piece.

[0026] According to some embodiments of the present invention, the second lower mold further includes a first annular frame, the second lower mold is provided with a first annular groove arranged around the fourth upper molding surface, and the first annular frame is adapted to the first annular groove;

[0027] Laminating the upper piece to the fourth upper forming surface, including:

[0028] The shoe upper piece is covered on the first annular groove, and the first annular frame is engaged with the first annular groove.

[0029] In order to avoid the problem of the upper piece wrinkling under negative pressure, the second lower mold also includes a first annular frame, and the second lower mold is provided with a first annular groove, which is arranged around the accommodating groove. When in use, the worker can cover the upper piece on the fourth upper molding surface and the first annular groove, and press the edge of the upper piece tightly against the first annular groove through the first annular frame, thereby avoiding the problem of the upper piece wrinkling toward the middle under the action of the negative pressure of the first suction hole. This is conducive to ensuring that the outer surface of the molded upper piece has a smooth transition, which is conducive to improving the molding quality of the shoe back, and is conducive to making the upper piece more compatible with the fourth upper molding surface and the molded surface more precise.

[0030] According to some embodiments of the present invention, the second upper molding surface and the second sole molding surface are both provided with a plurality of second air suction holes;

[0031] Laminating the upper piece to the second upper forming surface, and laminating the sole piece to the second sole forming surface, including:

[0032] Place the shoe upper piece corresponding to the second shoe upper forming surface, and evacuate the second suction hole so that the shoe upper piece is adsorbed on the second shoe upper forming surface;

[0033] Place the sole skirt piece corresponding to the second sole forming surface so that the sole skirt piece is adsorbed on the second sole forming surface.

[0034] Specifically, in order to maintain the fit of the sole piece and the second sole molding surface, as well as the fit of the upper piece and the second upper molding surface, the first lower mold is provided with a plurality of second suction holes on the second upper molding surface and the second sole molding surface. The upper piece is placed corresponding to the second upper molding surface. After the sole piece is placed corresponding to the second sole molding surface, the worker can use an external pump body to vacuum the second suction holes to form a negative pressure at the second suction holes. The negative pressure can make the upper piece adsorbed on the second upper molding surface and the sole piece adsorbed on the second sole molding surface, which is beneficial to avoid the problem of the sole piece or the upper piece being offset or wrinkled due to the expansion of the first foaming material. This combined molding process uses negative pressure adsorption and foaming expansion to make the sole piece form a shape that is compatible with the second sole molding surface, and the upper piece forms a shape that is compatible with the second upper molding surface, and is beneficial to improving the surface accuracy of the molding of the lower surface of the sole and the outer surface of the upper.

[0035] According to some embodiments of the present invention, the rear edge of the sole panel and the lower edge of the upper panel are overlapped and bonded together.

[0036] The rear edge of the sole panel overlaps with the lower edge of the upper panel, and under the foaming and expansion of the first foaming material, the sole panel and the upper panel are connected as one, which is beneficial to improving the connection stability between the sole panel and the upper panel. The sole panel and the sole panel are bonded as one, which is beneficial to avoiding the problem of vacuum leakage or glue leakage at the connection between the sole panel and the upper panel.

[0037] According to some embodiments of the present invention, the first upper molding surface and the first sole molding surface are both provided with a plurality of third air suction holes;

[0038] Laminating the upper shoe piece to the first upper forming surface and the first sole forming surface, including:

[0039] placing the upper shoe piece against the first upper molding surface and the first sole molding surface;

[0040] The third suction hole is vacuumed, and the upper shoe piece is adsorbed on the first upper molding surface and the first sole molding surface.

[0041] Specifically, in order to maintain the fit between the upper shoe piece and the first upper molding surface and the first sole molding surface, the first upper mold is provided with a plurality of third suction holes on the first upper molding surface and the first sole molding surface. After the upper shoe piece is covered on the first upper molding surface and the first sole molding surface and abutted against the first upper molding surface and the first sole molding surface, the worker can vacuum the third suction holes through an external pump body to form a negative pressure at the third suction holes. The negative pressure can be used to adsorb the upper shoe piece on the first upper molding surface and the first sole molding surface, which is conducive to avoiding the problem of the upper shoe piece being offset or wrinkled due to the expansion of the first foaming material. This combined molding process combines negative pressure adsorption with foaming expansion to form the upper shoe piece into a shape that matches the first sole molding surface and the first upper molding surface, and is conducive to improving the surface accuracy of the upper shoe piece molding.

[0042] According to some embodiments of the present invention, placing the upper shoe piece against the first upper forming surface and the first sole forming surface includes:

[0043] Providing a clamping frame, the clamping frame having an opening;

[0044] Connect the upper shoe piece to the clamping frame and cover the opening;

[0045] The clamping frame is close to the first upper mold, and the first upper molding surface and the first sole molding surface pass through the opening to abut against the upper shoe piece, and the upper shoe piece is kept taut.

[0046] Taking into account that the first upper molding surface and the first sole molding surface have concave and convex shapes, when the upper shoe piece is fitted to the first upper molding surface and the first sole molding surface, wrinkles are easily generated on the upper shoe piece at the concave and convex shapes, which causes the inner surface of the molded upper or sole to be uneven. The combined molding process also includes a clamping frame, which connects the upper shoe piece to the clamping frame and makes the upper shoe piece cover the opening. The clamping frame is then pressed relative to the first upper mold so that the first upper molding surface and the first sole molding surface pass through the opening and abut against the upper shoe piece. The setting of the clamping frame is conducive to keeping the upper shoe piece in a tensioned state when fitting, and utilizing the deformation of the upper shoe piece to form a shape and structure that is compatible with the first upper molding surface and the first sole molding surface.

[0047] According to some embodiments of the present invention, placing the upper shoe piece against the first upper forming surface and the first sole forming surface includes:

[0048] Providing a fitting piece, wherein the fitting piece has a fitting surface adapted to the first upper molding surface;

[0049] The upper shoe piece is covered on the first shoe upper forming surface, and the fitting surface of the fitting piece is embedded in the first shoe upper forming surface.

[0050] Taking into account that the first upper molding surface has a larger concave-convex amplitude than the first sole molding surface, it is difficult for the upper shoe piece to achieve full fit with the first upper molding surface. In areas where the concave-convex shape changes too much, the upper shoe piece is prone to wrinkles. The combined molding process also includes a fitting part, which has a fitting surface adapted to the first upper molding surface. During production, workers can cover the upper shoe piece on the first upper molding surface and the first sole molding surface, and press the fitting surface of the fitting part toward the first upper molding surface so that the fitting surface is embedded in the first upper molding surface, and the upper shoe piece is placed between the fitting part and the first upper mold. The mutual extrusion of the fitting part and the first upper mold is conducive to fitting the upper shoe piece with the first upper molding surface and reducing the wrinkles of the upper shoe piece at the first upper molding surface.

[0051] The shoe accessory according to the second embodiment of the present invention includes the combined molding process shown in any one of the first aspects.

[0052] The shoe accessories according to the embodiments of the present invention have at least the following beneficial effects: during production, workers can shape the upper piece so that a reinforcement layer is attached to the upper piece to enhance the hardness of the upper piece, and place the upper piece corresponding to the second upper molding surface. The upper piece is set corresponding to the upper, which is beneficial to enhancing the wrapping and support performance of the human heel, and placing the sole piece corresponding to the second sole molding surface. The rear edge of the sole piece is connected to the lower edge of the upper piece, and the upper shoe piece is attached to the first upper molding surface and the first sole molding surface. Then, the first foaming material can be added to the first lower mold. When the first upper mold is docked with the first lower mold and the mold is closed, the first upper molding surface and the second upper molding surface are set opposite to each other for molding the upper, and the first sole molding surface and the second sole molding surface are set opposite to each other for forming the sole. The first upper mold and the first lower mold jointly form a mold cavity, and the first foaming material foams in the mold cavity. The first foaming material is used to form a shape and structure that matches the first upper molding surface and the first sole molding surface, the upper surrounding piece is used to form a shape and structure that matches the second upper molding surface, and the sole surrounding piece is used to form a shape and structure that matches the second sole molding surface. The first foaming material fills the entire mold cavity, and the adhesive layer formed by the first foaming material is sandwiched between the upper shoe piece, the upper surrounding piece and the sole surrounding piece, so that the molded upper and the sole are connected as one. That is, the upper and the sole are integrally molded as a component, which is beneficial to improving the connection stability between the upper and the sole. Compared with the method of making the upper and the sole separately and then connecting them, it is beneficial to simplify the shoemaking process and improve production efficiency. Moreover, under the reinforcement of the reinforcement layer, the hardness of the upper is greater than the hardness of the sole, so as to achieve the supporting performance of the upper for the human heel and maintain the elasticity of the sole, and it is more applicable to various shoes.

[0053] The shoe according to the third embodiment of the present invention includes the footwear accessory shown in the second aspect.

[0054] The shoes according to the embodiments of the present invention have at least the following beneficial effects: during production, workers can shape the upper piece so that the upper piece is attached with a reinforcement layer to enhance the hardness of the upper piece, and place the upper piece corresponding to the second upper forming surface. The upper piece is arranged corresponding to the upper, which is beneficial to enhancing the wrapping and supporting performance of the human heel, and the sole piece is placed corresponding to the second sole forming surface, the rear edge of the sole piece is connected to the lower edge of the upper piece, the upper shoe piece is attached to the first upper forming surface and the first sole forming surface, and then the first foaming material can be added to the first lower mold. After the first upper mold and the first lower mold are docked and closed, the first upper forming surface and the second upper forming surface are arranged opposite to each other for forming the upper, and the first sole forming surface and the second sole forming surface are arranged opposite to each other for To form a sole, the first upper mold and the first lower mold together form a mold cavity, and the first foaming material is foamed and molded in the mold cavity. Under the expansion action of the first foaming material, the upper shoe piece is formed into a shape and structure that matches the first upper molding surface and the first sole molding surface, the upper surrounding piece is formed into a shape and structure that matches the second upper molding surface, and the sole surrounding piece is formed into a shape and structure that matches the second sole molding surface. The first foaming material fills the entire mold cavity, and the adhesive layer formed by the first foaming material is sandwiched between the upper shoe piece, the upper surrounding piece, and the sole surrounding piece, so that the molded upper and sole are connected as one body, that is, the upper and sole are integrally molded. This helps to improve the connection stability of the upper and sole. Compared with the method of separately manufacturing the upper and sole and then connecting them, it helps to simplify the shoemaking process and improve production efficiency. In addition, under the reinforcement action of the reinforcement layer, the hardness of the upper is made greater than the hardness of the sole, so that the upper can support the human heel and maintain the elasticity of the sole, and the shoe is more suitable for various shoes.

[0055] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0057] FIG1 is a schematic diagram of the three-dimensional structure of an assembly of a combined molding process according to an embodiment of the present invention;

[0058] FIG2 is another schematic diagram of the three-dimensional structure of the assembly of the combined molding process according to an embodiment of the present invention;

[0059] FIG3 is a schematic structural diagram of a shoe upper panel in a combined molding process according to an embodiment of the present invention;

[0060] FIG4 is a schematic structural diagram of the first upper mold and the first lower mold in the combined molding process according to an embodiment of the present invention;

[0061] FIG5 is a schematic structural diagram of a first lower mold in a combined molding process according to an embodiment of the present invention;

[0062] FIG6 is a schematic structural diagram of the separation of the first lower mold and the third annular frame in a combined molding process according to an embodiment of the present invention;

[0063] FIG7 is a schematic structural diagram of the upper and sole panels placed in the first lower mold in a combined molding process according to an embodiment of the present invention;

[0064] FIG8 is a schematic structural diagram of a first upper mold in a combined molding process according to an embodiment of the present invention;

[0065] FIG9 is a schematic structural diagram of a second lower mold in a combined molding process according to an embodiment of the present invention;

[0066] FIG10 is a structural schematic diagram of a second lower mold from another perspective of a combined molding process according to an embodiment of the present invention;

[0067] FIG11 is a flow chart of a combined molding process according to an embodiment of the present invention;

[0068] FIG12 is a flow chart of a combined molding process according to an embodiment of the present invention;

[0069] FIG13 is a flow chart of a combined molding process according to an embodiment of the present invention;

[0070] FIG14 is a flow chart of a combined molding process according to an embodiment of the present invention;

[0071] FIG15 is a flow chart of a combined molding process according to an embodiment of the present invention;

[0072] FIG16 is a flow chart of a combined molding process according to an embodiment of the present invention;

[0073] FIG17 is a flow chart of a combined molding process according to an embodiment of the present invention.

[0074] Reference numerals: 100, first upper mold; 110, first sole molding surface; 120, first upper molding surface; 121, recess; 130, protrusion; 140, third air extraction channel; 150, upper fitting surface; 160, third annular groove; 170, upper limit portion; 200, first lower mold; 210, second sole molding surface; 220, second upper molding surface; 221, textured portion; 230, recess; 240, second air extraction channel; 250, lower fitting surface; 260, second annular groove; 270, lower limit portion; 300, third annular frame; 400, second annular frame; 500, assembly; 510, sole sheath; 520, upper sheath; 600 , second lower mold; 610 , shell; 620 , mold core; 621 , fourth upper molding surface; 630 , first annular groove; 640 , first exhaust channel. DETAILED DESCRIPTION

[0075] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0076] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0077] In the description of the present invention, "a plurality" refers to more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the order of the indicated technical features.

[0078] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0079] 1 to 17 , a combined molding process according to an embodiment of the present invention includes the following steps:

[0080] Step S100: providing a forming mold, a first foaming material, an upper shoe piece, an upper panel 520, and a sole panel 510. The forming mold includes a first upper mold 100 and a first lower mold 200. The parting surface of the first upper mold 100 is provided with a first upper molding surface 120 and a first sole molding surface 110 connected thereto. The parting surface of the first lower mold 200 is provided with a second upper molding surface 220 and a second sole molding surface 210 connected thereto.

[0081] Step S200: attaching the upper shoe piece to the first upper molding surface 120 and the first sole molding surface 110;

[0082] Step S300, forming the upper piece 520 so that the upper piece 520 is attached with a reinforcement layer;

[0083] Step S400: Lay the upper piece 520 to the second upper molding surface 220, and the sole piece 510 to the second sole molding surface 210, so that the rear edge of the sole piece 510 is connected to the lower edge of the upper piece 520;

[0084] Step S500: Add a first foaming material to the first lower mold 200, close the first upper mold 100 and the first lower mold 200 to form a mold cavity, and foam the first foaming material in the mold cavity;

[0085] In step S600 , after holding the pressure for a first preset time, the first upper mold 100 and the first lower mold 200 are separated to obtain a combination 500 of the upper and the sole.

[0086] 4 , 5 , 6 and 8 , in step S100 , the molding mold includes a first upper mold 100 and a first lower mold 200 , the first upper mold 100 is a convex mold, and the first lower mold 200 is a concave mold. The lower surface of the first upper mold 100 is a parting surface, and the upper surface of the first lower mold 200 is a parting surface.

[0087] As shown in Figure 8, the lower surface of the first upper mold 100 includes a first upper molding surface 120 and a first sole molding surface 110. The first upper molding surface 120 is located behind the first sole molding surface 110 and is arranged at an angle to the first sole molding surface 110. The junction of the first upper molding surface 120 and the first sole molding surface 110 together forms a bump 130 that fits the human heel. Specifically, the first upper molding surface 120 is arched to wrap and support the human heel, and the first sole molding surface 110 is flat to fit the sole of the human foot.

[0088] 5 and 6 , the upper surface of the first lower mold 200 includes a second upper molding surface 220 and a second sole molding surface 210. The second upper molding surface 220 is located behind the second sole molding surface 210 and is arranged at an angle to the second sole molding surface 210. The junction of the second upper molding surface 220 and the second sole molding surface 210 together forms a groove 230 that fits the human heel, and the shape of the groove 230 matches the shape of the protrusion 130. Specifically, the second upper molding surface 220 is arched to wrap and support the human heel, and the second sole molding surface 210 is flat to fit the sole of the human foot.

[0089] Referring to Figures 1, 2 and 3, the upper shoe piece, the upper piece 520 and the sole piece 510 can be made of flexible materials. Under the foaming expansion action of the first foaming material and in combination with the limitation of the mold cavity, the upper shoe piece can be formed into a shape that is compatible with the first upper molding surface 120 and the first sole molding surface 110, the upper piece 520 can be formed into a shape that is compatible with the second upper molding surface 220, and the sole piece 510 can be formed into a shape that is compatible with the second sole molding surface 210.

[0090] 11 and 12 , it can be understood that in step S300, the shoe upper piece 520 is molded, including the following steps:

[0091] Step S310: providing a second upper mold, a second lower mold 600 and a second foaming material, wherein the parting surface of the second upper mold is provided with a third upper molding surface, and the parting surface of the second lower mold 600 is provided with a fourth upper molding surface 621;

[0092] Step S320, attaching the upper panel 520 to the fourth upper forming surface 621;

[0093] Step S330: Add the second foaming material to the upper portion of the shoe upper panel 520, close the second upper mold and the second lower mold 600 to enclose a molding cavity, and foam the second foaming material in the molding cavity;

[0094] Step S340 , after holding the pressure for a second preset time, the second upper mold and the second lower mold 600 are separated.

[0095] 9 and 10, the second upper mold is provided with a third upper molding surface, and the second lower mold 600 is provided with a fourth upper molding surface 621. The fourth upper molding surface 621 is adapted to the third upper molding surface. The upper sheet 520 is attached to the fourth upper molding surface 621, and the second foaming material is added to the upper portion of the upper sheet 520. The second upper mold and the second lower mold 600 are molded together so that the second foaming material foams and is connected to the upper sheet 520 as a whole. Under the limiting effect of the mold cavity, the second foaming material foams and forms a reinforcement layer attached to the surface of the upper sheet 520. Under the connecting effect of the reinforcement layer, the upper sheet 520 is connected to the upper sheet 520. The sheet 520 has a concave three-dimensional shape to improve the adaptability of the upper sheet 520 to the second upper molding surface 220, which is conducive to achieving comprehensive fitting and adaptation of the upper sheet 520 to the second upper molding surface 220. Under the expansion effect of the first foaming material, the upper sheet 520 is formed into a shape and structure that is adapted to the second upper molding surface 220. Under the connecting effect of the first foaming material, the upper sheet 520 and the sole sheet 510 are connected as one, which is conducive to improving the integrity of the upper and the sole. The reinforcement layer formed by the second foaming material is conducive to enhancing the protection and support performance of the upper for the human heel.

[0096] The combined molding process provided by the embodiment of the present invention is achieved by separately preparing the upper piece 520 and the sole piece 510, and by molding the upper piece 520, so that the hardness of the upper piece 520 is greater than the hardness of the sole piece 510, and the adhesive layer formed by the first foaming material makes the inner layer of the upper and the sole softer, so as to improve the wearing comfort of the user. The combined molding process is achieved by foaming the upper piece 520, so that the upper piece 520 and the sole piece 510 form a hardness difference, and are connected into one body under the connecting action of the first foaming material, thereby taking into account both the elasticity of the sole and the support of the upper.

[0097] The second upper mold and the second lower mold 600 are used for molding the upper piece 520, and the hardness of the reinforcement layer molded by the second foam material is greater than the glue layer molded by the first foam material, so that a hardness difference is formed between the upper piece 520 and the sole piece 510, thereby taking into account both the elasticity of the sole and the support of the upper.

[0098] It should be noted that the first preset time can be adjusted based on factors such as the type of the first foaming material, the amount of the first foaming material added, the materials of the upper shoe piece, the upper panel 520, and the sole panel 510, and can be, for example, 30 seconds, 40 seconds, 50 seconds, or 60 seconds. This is for example only and the value of the first preset time is not actually limited. The second preset time can be adjusted based on factors such as the type of the second foaming material, the amount of the second foaming material added, and the materials of the upper panel 520, and can be, for example, 30 seconds, 40 seconds, 50 seconds, or 60 seconds. This is for example only and the value of the second preset time is not actually limited.

[0099] 9 and 10 , it can be understood that the second lower mold 600 includes a shell 610 and a mold core 620 , the shell 610 is provided with a recessed accommodating groove, the mold core 620 is detachably connected to the shell 610 , the mold core 620 is adapted to the accommodating groove, and the mold core 620 can be embedded and connected to the accommodating groove.

[0100] Considering that traditional molds are made of a single piece of mold steel and are finely crafted using metalworking machines, the processing time required for fine-tuning traditional molds is long, resulting in high mold opening costs. Furthermore, molds produced using ordinary metalworking machines are difficult to meet the molding requirements of shoe heels with complex structures and shapes. The second lower mold 600 includes a shell 610 and a mold core 620. The shell 610 is provided with a recessed receiving groove, and the mold core 620 is removably connected to the receiving groove of the shell 610. A fourth upper molding surface 621 is provided on the upper surface of the mold core 620.

[0101] The mold core 620 is adapted to fit within the receiving groove and can be embedded and connected thereto. The shape and size of the mold core 620 are adapted to the size and shape of the receiving groove, and the mold core 620 and the receiving groove form a clearance fit or an interference fit, thereby achieving a removable connection between the mold core 620 and the housing 610 and minimizing the gap between the outer circumference of the mold core 620 and the inner circumference of the receiving groove.

[0102] When the mold core 620 is assembled with the shell 610, the mold core 620 is embedded in the accommodating groove. The second lower mold 600 can be used for the foaming molding process. The worker can cover the upper piece 520 on the mold core 620. The upper piece 520 fits with the fourth upper molding surface 621 and cooperates with the expansion of the second foaming material, so that the upper piece 520 forms a shape and structure that matches the fourth upper molding surface 621, which is conducive to making the surface shape and structure of the upper piece 520 after molding more consistent with the fourth upper molding surface 621. The mold core 620 is combined with the shell 610 to produce a new shoe upper, which is conducive to reducing the processing time and mold opening cost of the second lower mold 600. In addition, the mold core 620 is designed and manufactured separately, which is conducive to reducing the interference of the shell 610 on mechanical processing, thereby making the structure and shape of the mold core 620 more flexible to meet the molding requirements of shoe uppers of various structures and shapes.

[0103] 9 and 10 , it can be understood that the second lower mold 600 is also provided with a first air exhaust channel 640, the fourth upper molding surface 621 is provided with a plurality of first air suction holes, one end of the first air exhaust channel 640 is connected to the first air suction hole, and the other end of the first air exhaust channel 640 is provided with a first air exhaust port.

[0104] The first air suction port can be connected to an external air pump through a hose, so that the first air suction hole generates negative pressure, so that the upper piece 520 is tightly attached to the fourth upper molding surface 621, and cooperates with the expansion of the second foaming material, so that the upper piece 520 forms a shape and structure that is compatible with the fourth upper molding surface 621. The negative pressure suction method is beneficial to make the surface shape and structure of the upper piece 520 after molding more consistent with the molding surface, with higher precision, and avoid the problem of wrinkles on the surface of the upper piece 520.

[0105] As another embodiment, the combined molding process can realize the molding of the upper piece 520 through a hot pressing molding process. Workers can add reinforcement material to the top of the upper piece 520. Under the hot pressing action of the hot pressing equipment, the reinforcement material is attached to the top of the upper piece 520 and forms a reinforcement layer, so that the hardness of the upper piece 520 is greater than the hardness of the sole piece 510, and the glue layer formed by the first foaming material makes the inner layer of the upper and the sole softer, so as to improve the user's wearing comfort. The combined molding process performs hot pressing on the upper piece 520 to form a hardness difference between the upper piece 520 and the sole piece 510, and is connected into one under the connecting action of the first foaming material, thereby taking into account both the elasticity of the sole and the support of the upper.

[0106] 13 , it can be understood that, in this embodiment, the second lower mold 600 further includes a first annular frame, and the second lower mold 600 is provided with a first annular groove 630 disposed around the fourth upper molding surface 621 , and the first annular frame is adapted to the first annular groove 630 ;

[0107] In step S320, the upper panel 520 is attached to the fourth upper forming surface 621, including:

[0108] Step S321 , covering the shoe upper piece 520 on the first annular groove 630 , and fitting the first annular frame into the first annular groove 630 .

[0109] In order to avoid the problem of the upper piece 520 wrinkling under negative pressure, the second lower mold 600 also includes a first annular frame, and the second lower mold 600 is provided with a first annular groove 630, and the first annular groove 630 is arranged around the fourth upper molding surface 621. When in use, the worker can cover the upper piece 520 on the fourth upper molding surface 621 and the first annular groove 630, and press the edge of the upper piece 520 against the first annular groove 630 through the first annular frame, thereby avoiding the problem of the upper piece 520 wrinkling toward the middle under the action of the negative pressure of the first suction hole. It is beneficial to ensure that the outer surface of the molded upper piece 520 has a smooth transition, which is beneficial to improving the molding quality of the shoe back upper, and is beneficial to making the upper piece 520 more compatible with the fourth upper molding surface 621 and the molded surface more precise.

[0110] Referring to Figure 8, it can be understood that in step S200, the first upper molding surface 120 and the first sole molding surface 110 are both provided with multiple third air suction holes, the first upper mold 100 is provided with a third air exhaust channel 140, and the third air suction holes located on the first upper molding surface 120 and the first sole molding surface 110 are connected to the third air exhaust channel 140.

[0111] There are multiple third air suction holes densely distributed on the first upper molding surface 120 and the first sole molding surface 110. The multiple third air suction holes are all connected to one end of the third air exhaust channel 140. The other end of the third air exhaust channel 140 is the third air exhaust port. Workers can connect the external pump body to the third air exhaust port through a hose. Under the pressure change action of the pump body, negative pressure is generated at the third air suction hole.

[0112] 15 , it can be understood that in step S200 , laminating the upper shoe piece to the first upper molding surface 120 and the first sole molding surface 110 includes the following steps:

[0113] Step S210 , placing the upper shoe piece against the first upper molding surface 120 and the first sole molding surface 110 ;

[0114] Step S220 , vacuuming the third suction hole, and adsorbing the upper shoe piece onto the first upper molding surface 120 and the first sole molding surface 110 .

[0115] Specifically, in order to maintain the fit between the upper shoe piece and the first upper molding surface 120 and the first sole molding surface 110, the first upper mold 100 is provided with a plurality of third suction holes on the first upper molding surface 120 and the first sole molding surface 110. After the upper shoe piece is covered on the first upper molding surface 120 and the first sole molding surface 110 and abutted against the first upper molding surface 120 and the first sole molding surface 110, the worker can use an external pump body to vacuum the third suction holes to form a negative pressure at the third suction holes. The negative pressure can be used to adsorb the upper shoe piece on the first upper molding surface 120 and the first sole molding surface 110, which is beneficial to avoid the problem of the upper shoe piece being offset or wrinkled due to the expansion of the first foaming material. This combined molding process uses negative pressure adsorption and foaming expansion to form the upper shoe piece into a shape that is compatible with the first sole molding surface 110 and the first upper molding surface 120, and is beneficial to improving the surface accuracy of the upper shoe piece molding.

[0116] 16 , it can be understood that, in step S210 , the upper shoe piece is brought into contact with the first upper molding surface 120 and the first sole molding surface 110 , and the following steps are also included:

[0117] Step S211, providing a clamping frame, wherein the clamping frame has an opening;

[0118] Step S212, connecting the upper shoe piece to the clamping frame and covering the opening;

[0119] Step S213 , the clamping frame moves closer to the first upper mold 100 , and the first upper molding surface 120 and the first sole molding surface 110 pass through the opening and abut against the upper shoe piece, and the upper shoe piece remains taut.

[0120] In step S211, the clamping frame includes a first frame body and a second frame body, the first frame body and the second frame body are rotatably connected, and both the first frame body and the second frame body are provided with openings, the first frame body and the second frame body can be relatively unfolded or overlapped, and when the first frame body and the second frame body overlap, the opening of the first frame body and the opening of the second frame body are overlapped.

[0121] In step S212, during production, workers can unfold the first frame and the second frame, and place the upper shoe piece on one of the first frame and the second frame, and then rotate the other of the first frame and the second frame so that the upper shoe piece is clamped between the first frame and the second frame. The clamping of the first frame and the second frame helps to cover the opening, and the upper shoe piece is in a tensioned state, which helps to avoid the problem that the upper shoe piece cannot fully fit with the first upper molding surface 120 or the first sole molding surface 110 when the upper shoe piece abuts against the first upper molding surface 120 or the first sole molding surface 110.

[0122] In step S213, after the upper shoe piece is clamped between the first frame and the second frame, the worker can align the opening of the clamping frame with the first upper molding surface 120 and the first sole molding surface 110, and apply pressure to the clamping frame toward the first upper mold 100, so that the clamping frame approaches the first upper mold 100, and the first upper molding surface 120 and the first sole molding surface 110 pass through the opening and abut against the upper shoe piece.

[0123] Taking into account that the first upper molding surface 120 and the first sole molding surface 110 have concave and convex shapes, when the upper shoe piece is fitted to the first upper molding surface 120 and the first sole molding surface 110, wrinkles are easily generated on the upper shoe piece at the concave and convex shapes, resulting in an uneven surface of the molded upper or sole. The combined molding process also includes a clamping frame, which connects the upper shoe piece to the clamping frame and makes the upper shoe piece cover the opening. The clamping frame is then pressed relative to the first upper mold 100 so that the first upper molding surface 120 and the first sole molding surface 110 pass through the opening and abut against the upper shoe piece. The setting of the clamping frame is conducive to keeping the upper shoe piece in a tensioned state when fitting, and utilizing the deformation of the upper shoe piece to form a shape and structure that is compatible with the first upper molding surface 120 and the first sole molding surface 110.

[0124] As another embodiment, the clamping frame is provided with a plurality of positioning pins, which are arranged around the opening. During use, a worker can pass the upper shoe piece through the positioning pins so that the upper shoe piece is connected to the clamping frame and covers the opening of the clamping frame. The positioning pins are arranged to facilitate fixing the relative position of the upper shoe piece and the clamping frame. The worker can then direct the positioning pins toward the first upper mold 100, align the opening of the clamping frame with the first upper molding surface 120 and the first sole molding surface 110, and apply pressure to the clamping frame toward the first upper mold 100, so that the clamping frame approaches the first upper molding surface 120 and the first sole molding surface 110 after passing through the opening and abutting against the upper shoe piece. Under the limiting action of the positioning pins, the upper shoe piece remains in a tensioned state, which facilitates achieving a full fit between the upper shoe piece and the first upper molding surface 120 or the first sole molding surface 110.

[0125] It is understandable that, in this embodiment, the molding die further includes a third annular frame 300 , the first upper mold 100 is provided with a third annular groove 160 surrounding the first upper molding surface 120 and the first sole molding surface 110 , and the third annular frame 300 is adapted to the third annular groove 160 ;

[0126] In step S210 , the upper shoe piece is brought into contact with the first upper molding surface 120 and the first sole molding surface 110 , and the following steps are also included: the upper shoe piece is covered on the third annular groove 160 , and the third annular frame 300 is engaged with the third annular groove 160 .

[0127] 8 , in order to ensure that the upper shoe piece can be in close contact with the first sole molding surface 110 and the first upper molding surface 120 and to prevent the problem of wrinkles on the upper shoe piece at the first upper molding surface 120 and the first sole molding surface 110 caused by the vacuum in the first exhaust channel 640, the molding die further includes a third annular frame 300, and the first upper mold 100 is provided with a third annular groove 160 on the outer sides of the first upper molding surface 120 and the first sole molding surface 110.

[0128] When the upper shoe piece covers the first sole molding surface 110 and the first upper molding surface 120, the worker can embed the third annular frame 300 in the third annular groove 160, and clamp the outer edge of the upper shoe piece between the third annular frame 300 and the third annular groove 160, which is conducive to tensioning the upper shoe piece and fitting it with the first upper molding surface 120 and the first sole molding surface 110, and cooperating with the expansion effect of the first foaming material to form a surface shape that adapts to the first upper molding surface 120 and the first sole molding surface 110, and can effectively reduce wrinkles generated after the upper shoe piece is formed, so as to ensure that the surface of the upper and sole that fits the human body has a smooth transition, and the engagement of the third annular frame 300 and the third annular groove 160 is conducive to fixing the upper shoe piece on the first upper mold 100, and fixing the fitting state of the upper shoe piece with the first upper molding surface 120 and the first sole molding surface 110, without the need for workers to press at all times to fit the upper shoe piece with the first upper mold 100.

[0129] 17 , it can be understood that, in step S210 , the upper shoe piece is brought into contact with the first upper molding surface 120 and the first sole molding surface 110 , and the following steps are also included:

[0130] Step S214, providing a fitting member, wherein the fitting member has a fitting surface adapted to the first upper molding surface 120;

[0131] Step S215 , covering the upper shoe piece on the first upper molding surface 120 , and embedding the fitting surface of the fitting piece with the first upper molding surface 120 .

[0132] Compared with the first sole molding surface 110, the first upper molding surface 120 has a larger concave-convex range, and it is difficult for the upper shoe piece to fully fit with the first upper molding surface 120. In areas where the concave-convex shape changes too much, the upper shoe piece is prone to wrinkles. The combined molding process also includes a fitting part, which has a fitting surface that is adapted to the first upper molding surface 120.

[0133] 1 and 8 , during production, workers can cover the upper shoe piece on the first upper molding surface 120 and the first sole molding surface 110, and press the fitting surface of the fitting piece toward the first upper molding surface 120 so that the fitting surface is embedded in the first upper molding surface 120, and the upper shoe piece is placed between the fitting piece and the first upper mold 100. The mutual extrusion between the fitting piece and the first upper mold 100 facilitates the fitting of the upper shoe piece with the first upper mold 100 and reduces wrinkles on the upper shoe piece at the first upper molding surface 120.

[0134] It is understood that the molding die further includes a third lower mold having a fifth upper molding surface and a third sole molding surface connected thereto, and the fitting member can be the third lower mold. The fifth upper molding surface is adapted to the first upper molding surface 120, and the third sole molding surface is adapted to the first sole molding surface 110.

[0135] During use, the worker can first connect the upper shoe piece to the clamping frame and move the clamping frame closer to the first upper mold 100 so that the first upper molding surface 120 and the first sole molding surface 110 pass through the opening and abut against the upper shoe piece. Then, the third annular frame 300 can be passed through the opening and the upper shoe piece can be pressed tightly into the third annular groove 160 to maintain the fit between the upper shoe piece and the first upper mold 100. Then the third lower mold is passed through the opening and docked with the first upper mold 100. Under the mutual extrusion of the third lower mold and the first upper mold 100, the upper shoe piece is facilitated to fit with the first upper mold 100, and the wrinkles of the upper shoe piece at the first upper molding surface 120 or the first sole molding surface 110 are reduced, which is conducive to the full fit of the upper shoe piece with the first upper molding surface 120 or the first sole molding surface 110. Then, by vacuuming, the gap between the upper shoe piece and the first upper molding surface 120 or the first sole molding surface 110 can be eliminated, and the upper shoe piece can be adsorbed on the first upper mold 100 to maintain the fit between the upper shoe piece and the first upper mold 100, which is conducive to the full fit of the upper shoe piece with the first upper molding surface 120 and the first sole molding surface 110.

[0136] It is understandable that the second upper molding surface 220 and the second sole molding surface 210 are both provided with multiple second air suction holes; the first lower mold base 200 is provided with a second air suction channel 240, and the multiple second air suction holes are all connected to one end of the second air suction channel 240, and the other end of the second air suction channel 240 is provided with a second air suction port, which can be connected to an external pump body to achieve vacuum treatment of the second air suction holes.

[0137] 14 , in step S400, the upper piece 520 is bonded to the second upper molding surface 220 and the sole piece 510 is bonded to the second sole molding surface 210, including:

[0138] S410, placing the upper piece 520 corresponding to the second upper molding surface 220, and evacuating the second suction hole so that the upper piece 520 is adsorbed on the second upper molding surface 220;

[0139] S420 , placing the sole skirt 510 corresponding to the second sole molding surface 210 , so that the sole skirt 510 is adsorbed on the second sole molding surface 210 .

[0140] 5, 6 and 7, specifically, in order to maintain the fit between the sole piece 510 and the second sole molding surface 210, and the fit between the upper piece 520 and the second upper molding surface 220, the first lower mold 200 is provided with a plurality of second suction holes at the second upper molding surface 220 and the second sole molding surface 210. After the upper piece 520 is placed corresponding to the second upper molding surface 220 and the sole piece 510 is placed corresponding to the second sole molding surface 210, the worker can pump the second suction holes through an external pump body. The air holes are vacuumed to form a negative pressure at the second air suction holes. The negative pressure can be used to make the upper piece 520 adsorbed on the second upper molding surface 220 and the sole piece 510 adsorbed on the second sole molding surface 210, which is beneficial to avoid the problem of the sole piece 510 or the upper piece 520 being offset or wrinkled due to the expansion of the first foaming material. This combined molding process uses negative pressure adsorption and foaming expansion to make the sole piece 510 form a shape that is compatible with the second sole molding surface 210, and the upper piece 520 form a shape that is compatible with the second upper molding surface 220, and is beneficial to improving the surface accuracy of the molding of the lower surface of the sole and the outer surface of the upper.

[0141] 7 , it is understood that the rear edge of the sole gusset 510 overlaps the lower edge of the upper gusset 520. This allows the sole gusset 510 and the upper gusset 520 to be integrally connected due to the foaming and expansion of the first foaming material, thereby improving the connection stability between the sole gusset 510 and the upper gusset 520. Furthermore, the integral bonding of the upper gusset 510 and the sole gusset 520 prevents vacuum or glue leakage at the junction of the sole gusset 510 and the upper gusset 520. After the upper gusset 520 is formed, a worker can trim the lower edge of the upper gusset 520 using a cutting tool to remove any excess edge, apply glue to the lower edge of the upper gusset 520, and adhere the rear edge of the sole gusset 510 to the lower edge of the upper gusset 520, thereby achieving the connection between the sole gusset 510 and the upper gusset 520.

[0142] As another embodiment, the sole piece 510 and the upper piece 520 are made of the same sheet material. Under the extrusion action of the second upper mold and the second lower mold 600, the upper piece 520 cooperates with the foaming molding of the second foaming material to form a reinforcement layer, so that a dividing contour line is formed between the sole piece 510 and the upper piece 520. Then, through cutting, the sole piece 510 can be adapted to the second sole molding surface 210, and the upper piece 520 can be adapted to the second upper molding surface 220.

[0143] 5 and 6 , it can be understood that, in this embodiment, the molding die further includes a second annular frame 400 , the first lower mold 200 is provided with a second annular groove 260 surrounding the second upper molding surface 220 and the second sole molding surface 210 , and the second annular frame 400 is adapted to the second annular groove 260 ;

[0144] In step S400 , the upper piece 520 is fitted to the second upper molding surface 220 , which also includes the following steps: covering the upper piece 520 on the second annular groove 260 , and fitting the second annular frame 400 into the second annular groove 260 .

[0145] In order to keep the upper piece 520 in contact with the second upper molding surface 220, the molding mold further includes a second annular frame 400. The first lower mold 200 is provided with a second annular groove 260 surrounding the second upper molding surface 220 and matching the second sole molding surface 210. During production, the worker can cover the upper piece 520 with the second annular groove 260 and the second upper molding surface 220, and fit the second annular frame 400 with the second annular groove 260, so that the outer edge of the upper piece 520 is clamped on the second annular groove 260. The groove 260 and the second annular frame 400 are conducive to fixing the fitting state of the upper piece 520 and the second upper molding surface 220, without the need for workers to press all the time to make the upper piece 520 fit with the first lower mold 200, and the engagement of the second annular frame 400 and the second annular groove 260 is conducive to improving the sealing between the upper piece 520 and the second upper molding surface 220, and is conducive to avoiding the problem of vacuum leakage between the upper piece 520 and the second upper molding surface 220 or the second sole molding surface 210.

[0146] Specifically, after the worker places the upper piece 520 corresponding to the second upper molding surface 220, the upper edge of the upper piece 520 can be folded outward so that the upper piece 520 partially covers the second annular groove 260, and then the second annular frame 400 is engaged with the second annular groove 260 to preliminarily fix the relative position of the upper piece 520 in the first lower mold 200. Then, the second suction hole can be vacuumed to make the upper piece 520 fit the second upper molding surface 220. After adjusting the relative relationship between the upper piece 520 and the second upper molding surface 220, the sole piece 510 can be placed corresponding to the second sole molding surface 210, and the rear edge of the sole piece 510 and the lower edge of the upper piece 520 are overlapped and fit together, so that the upper piece 520 and the sole piece 510 together form the upper piece 520.

[0147] It can be understood that after the first foaming material is foamed and molded in the mold cavity, when the first upper mold 100 is separated from the first lower mold 200, the worker can use an external pump body to blow air into the second air intake hole and the third air intake hole, that is, blow gas out from the second air intake hole and the third air intake hole to assist in achieving the separation of the upper shoe piece from the first upper molding surface 120 and the first sole molding surface 110, the separation of the upper piece 520 from the second upper molding surface 220, and the separation of the sole piece 510 from the second sole molding surface 210, which is beneficial to avoid the problem of damage to the assembly 500 caused by pulling the assembly 500 to demold, and is beneficial to improving the demolding efficiency of the assembly 500. The combined molding process uses vacuum extraction to allow the upper shoe piece to be adsorbed on the first upper molding surface 120 and the first sole molding surface 110, the upper piece 520 to be adsorbed on the second upper molding surface 220, and the sole piece 510 to be adsorbed on the second sole molding surface 210, so as to improve the surface molding accuracy of the combination 500. By means of air blowing, it is beneficial to separate the molded combination 500 from the first upper mold 100 and the first lower mold 200, and maintain the integrity of the combination 500.

[0148] After the second foaming material has completed foaming within the mold cavity, the second upper mold and the second lower mold 600 are separated. A worker can use an external pump to blow air through the first air intake hole, thereby assisting in separating the upper panel 520 from the fourth upper molding surface 621. This helps avoid damage to the upper panel 520, which may result from pulling the reinforcement layer attached to it during demolding, and improves the efficiency of demolding the upper panel 520. This combined molding process uses vacuum extraction to adhere the upper panel 520 to the fourth upper molding surface 621, thereby improving the surface molding accuracy of the upper panel 520. Air blowing facilitates separation of the upper panel 520, which has the reinforcement layer attached, from the second lower mold 600, while maintaining the integrity of the upper panel 520.

[0149] 5, 6, and 8, it can be understood that the first upper molding surface 120 has a forward-facing recessed portion 121, so that the molded upper has a forward-facing raised block, and the second upper molding surface 220 has a forward-facing raised portion, which mates with the recessed portion 121. When the first upper mold 100 and the first lower mold 200 are closed, the raised portion and the recessed portion 121 together form a forward-facing cavity. After the first foaming material expands and forms within the cavity, the first foaming material fills the cavity to form the forward-facing raised block.

[0150] The raised block is arranged corresponding to the concave ankle tube of the human ankle, which is beneficial to protecting and wrapping the human heel and absorbing the impact generated by human movement, thereby improving the user's wearing comfort.

[0151] 5 and 6 , it can be understood that the second upper molding surface 220 corresponds to the outer surface of the upper, that is, the appearance surface of the shoe at the upper, and the second upper molding surface 220 is provided with a concave and convex texture portion 221. By fitting the upper piece 520 with the second upper molding surface 220 and cooperating with the expansion of the first foaming material, the upper piece 520 forms a surface shape that is adapted to the texture portion 221, and is conducive to improving the molding accuracy of the upper piece 520. Compared with the hot pressing molding process, it is conducive to reducing the restrictions of the heating temperature on the fabric and avoiding the problem of the fabric being damaged by high temperature.

[0152] It should be noted that the specific texture of the texture portion 221 can be produced according to the design of the actual shoe, and the specific texture of the texture portion 221 is not limited here.

[0153] It can be understood that in step S500, specifically, the first foaming material can be a polyurethane mixture. During the foaming process of the foaming material, the foaming material will heat up and expand by itself, so that the first foaming material is connected to the upper shoe piece, the upper piece 520 and the sole piece 510 as a whole, and the upper shoe piece is formed into a shape that is compatible with the first upper molding surface 120 and the first sole molding surface 110, the upper piece 520 is formed into a shape that is compatible with the second upper molding surface 220, and the sole piece 510 is formed into a shape that is compatible with the second sole molding surface 210, thereby improving the surface accuracy of the upper and sole molding.

[0154] For the molded upper and sole assembly 500, the upper shoe piece is the material that contacts the sole and heel of the human foot and can be made of skin-friendly materials, such as various fabrics. The lower surface of the sole skirt 510 is used to connect to the midsole, and the rear surface of the upper skirt 520 serves as the rear surface and exterior appearance of the shoe heel.

[0155] It can be understood that in step S500, the first lower mold 200 is provided with a lower fitting surface 250 arranged around the second upper molding surface 220 and the second sole molding surface 210, and the first upper mold 100 is provided with an upper fitting surface 150 arranged around the first upper molding surface 120 and the first sole molding surface 110, and the upper fitting surface 150 can abut against the lower fitting surface 250 to close the mold cavity.

[0156] Specifically, the lower surface is gradually tilted upward from the inside to the outside, and the upper surface is gradually tilted upward from the inside to the outside. When the first upper mold 100 and the first lower mold 200 are closed, the upper fitting surface 150 and the lower fitting surface 250 are tightly attached to close the outer edge of the mold cavity. Under the expansion action of the first foaming material, the first foaming material forms a shape that is adapted to the mold cavity, and is beneficial to avoid the problem of the first foaming material overflowing the mold cavity, and is beneficial to make the molded upper and sole assembly 500 have a preset hardness and softness. By setting the inclination angles of the upper and lower surfaces, it is beneficial to realize the guidance of the first upper mold 100 and the first lower mold 200 to realize the docking of the first upper mold 100 and the first lower mold 200.

[0157] 3 , 5 , 6 and 8 , it can be understood that in order to achieve stable docking between the first upper mold 100 and the first lower mold 200, the first lower mold 200 is further provided with a lower limit portion 270, and the first upper mold 100 is further provided with an upper limit portion 170. When the first upper mold 100 is close to the first lower mold 200, the docking between the upper limit portion 170 and the lower limit portion 270 is beneficial to limit the lateral movement of the first upper mold 100 relative to the first lower mold 200, which is beneficial to make the first upper mold 100 and the first lower mold 200 dock according to the preset position to ensure that the shape of the mold cavity is the preset shape.

[0158] Specifically, the lower limit portion 270 includes four connecting columns, which are arranged around the second annular groove 260. The upper ends of the four connecting columns are provided with downwardly recessed slots. Matchingly, the upper limit portion 170 includes four plug-in columns, which are arranged around the first annular groove 630. The plug-in columns are arranged in a one-to-one correspondence with the connecting columns, and the lower ends of the plug-in columns can be plugged into the slots.

[0159] When the four plug-in columns are connected to the four connecting columns and the upper fitting surface 150 is in close contact with the lower fitting surface 250 , the first upper mold 100 and the first lower mold 200 can be docked.

[0160] A shoe accessory according to an embodiment of the present invention is manufactured using the combined molding process shown in the above embodiment.

[0161] During production, workers can shape the upper piece 520 so that the upper piece 520 is attached with a reinforcement layer to enhance the hardness of the upper piece 520, and place the upper piece 520 corresponding to the second upper molding surface 220. The upper piece 520 is arranged corresponding to the upper, which is beneficial to enhancing the wrapping and supporting performance of the human heel. The sole piece 510 is placed corresponding to the second sole molding surface 210, and the rear edge of the sole piece 510 is connected to the lower edge of the upper piece 520. The first upper mold 120 and the first sole mold 110 are joined together, and then the first foaming material can be added to the first lower mold 200. When the first upper mold 100 and the first lower mold 200 are docked and closed, the first upper mold 120 and the second upper mold 220 are arranged opposite to each other to form the upper, and the first sole mold 110 and the second sole mold 210 are arranged opposite to each other to form the sole. The first upper mold 100 and the first lower mold 200 together form a mold cavity, and the first foaming material is added to the first lower mold 200. The material is foamed and formed in the mold cavity. Under the expansion effect of the first foam material, it is beneficial for the upper shoe piece to be formed into a shape and structure that is compatible with the first upper molding surface 120 and the first sole molding surface 110, the upper skirt 520 to be formed into a shape and structure that is compatible with the second upper molding surface 220, and the sole skirt 510 to be formed into a shape and structure that is compatible with the second sole molding surface 210. The first foam material fills the entire mold cavity, and the adhesive layer formed by the first foam material is sandwiched between the upper shoe piece and the upper skirt 520 and Between the sole skirt 510, the formed upper and the sole are connected as one, that is, the upper and the sole are formed as one piece, which is beneficial to improving the connection stability between the upper and the sole. Compared with the method of making the upper and the sole separately and then connecting them, it is beneficial to simplify the shoemaking process and improve production efficiency. Moreover, under the reinforcement effect of the reinforcement layer, the hardness of the upper is greater than the hardness of the sole, so as to realize the support performance of the upper for the human heel and maintain the elasticity of the sole, and it is more applicable to various shoes.

[0162] A shoe according to an embodiment of the present invention includes the footwear accessories shown in the above embodiment.

[0163] During production, workers can shape the upper piece 520 so that the upper piece 520 is attached with a reinforcement layer to enhance the hardness of the upper piece 520, and place the upper piece 520 corresponding to the second upper molding surface 220. The upper piece 520 is arranged corresponding to the upper, which is beneficial to enhancing the wrapping and supporting performance of the human heel. The sole piece 510 is placed corresponding to the second sole molding surface 210, and the rear edge of the sole piece 510 is connected to the lower edge of the upper piece 520. The first upper mold 120 and the first sole mold 110 are joined together, and then the first foaming material can be added to the first lower mold 200. When the first upper mold 100 and the first lower mold 200 are docked and closed, the first upper mold 120 and the second upper mold 220 are arranged opposite to each other to form the upper, and the first sole mold 110 and the second sole mold 210 are arranged opposite to each other to form the sole. The first upper mold 100 and the first lower mold 200 together form a mold cavity, and the first foaming material is added to the first lower mold 200. The material is foamed and formed in the mold cavity. Under the expansion effect of the first foam material, it is beneficial for the upper shoe piece to be formed into a shape and structure that is compatible with the first upper molding surface 120 and the first sole molding surface 110, the upper skirt 520 to be formed into a shape and structure that is compatible with the second upper molding surface 220, and the sole skirt 510 to be formed into a shape and structure that is compatible with the second sole molding surface 210. The first foam material fills the entire mold cavity, and the adhesive layer formed by the first foam material is sandwiched between the upper shoe piece and the upper skirt 520 and Between the sole skirt 510, the formed upper and the sole are connected as one, that is, the upper and the sole are formed as one piece, which is beneficial to improving the connection stability between the upper and the sole. Compared with the method of making the upper and the sole separately and then connecting them, it is beneficial to simplify the shoemaking process and improve production efficiency. Moreover, under the reinforcement effect of the reinforcement layer, the hardness of the upper is greater than the hardness of the sole, so as to realize the support performance of the upper for the human heel and maintain the elasticity of the sole, and it is more applicable to various shoes.

[0164] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the scope of the present invention.

Claims

1. Combined molding process, characterized in that: include: A molding mold, a first foaming material, an upper shoe piece, an upper surrounding piece (520) and a sole surrounding piece (510) are provided, wherein the molding mold comprises a first upper mold (100) and a first lower mold (200), wherein a parting surface of the first upper mold (100) is provided with a first upper molding surface (120) and a first sole molding surface (110) connected to each other, and a parting surface of the first lower mold (200) is provided with a second upper molding surface (220) and a second sole molding surface (210) connected to each other; Laying the upper shoe piece to the first upper molding surface (120) and the first sole molding surface (110); Performing a molding process on the upper circumference piece (520) so that the upper circumference piece (520) is attached with a reinforcement layer; The upper circumference piece (520) is fitted to the second upper molding surface (220), and the sole circumference piece (510) is fitted to the second sole molding surface (210), and the rear edge of the sole circumference piece (510) is connected to the lower edge of the upper circumference piece (520); The first foaming material is added to the first lower mold (200), the first upper mold (100) and the first lower mold (200) are molded together to form a mold cavity, and the first foaming material is foamed in the mold cavity; After maintaining the pressure for a first preset time, the first upper mold (100) and the first lower mold (200) are separated to obtain a combination (500) of the upper and the sole.

2. The combined molding process according to claim 1, characterized in that: The step of molding the upper skirt (520) comprises: Providing a second upper mold, a second lower mold (600) and a second foaming material, wherein the parting surface of the second upper mold is provided with a third upper molding surface, and the parting surface of the second lower mold (600) is provided with a fourth upper molding surface (621); Laying the upper skirt piece (520) onto the fourth upper molding surface (621); The second foaming material is added above the upper panel (520), the second upper mold and the second lower mold (600) are molded together to enclose a molding cavity, and the second foaming material is foamed in the molding cavity; After maintaining the pressure for a second preset time, the second upper mold and the second lower mold (600) are separated.

3. The combined molding process according to claim 2, characterized in that: The second upper mold or the second lower mold (600) includes a shell (610) and a mold core (620), the shell (610) is provided with a recessed receiving groove, the mold core (620) is detachably connected to the shell (610), the mold core (620) is adapted to the receiving groove, and the mold core (620) can be embedded and connected to the receiving groove.

4. The combined molding process according to claim 2, characterized in that: The second lower mold (600) is also provided with a first air suction channel (640), the fourth upper molding surface (621) is provided with a plurality of first air suction holes, one end of the first air suction channel (640) is connected to the first air suction holes, and the other end of the first air suction channel (640) is provided with a first air suction port.

5. The combined molding process according to claim 4, characterized in that: The second lower mold (600) further comprises a first annular frame, the second lower mold (600) is provided with a first annular groove (630) arranged around the fourth upper molding surface (621), and the first annular frame is adapted to the first annular groove (630); The step of attaching the upper skirt piece (520) to the fourth upper molding surface (621) comprises: The shoe upper panel (520) is covered on the first annular groove (630), and the first annular frame is engaged with the first annular groove (630).

6. The combined molding process according to claim 1, characterized in that: The second upper molding surface (220) and the second sole molding surface (210) are both provided with a plurality of second air suction holes; The step of laminating the upper circumference piece (520) to the second upper molding surface (220), and laminating the sole circumference piece (510) to the second sole molding surface (210), comprises: Placing the shoe upper sheet (520) corresponding to the second shoe upper molding surface (220), and evacuating the second suction hole so that the shoe upper sheet (520) is adsorbed on the second shoe upper molding surface (220); The shoe sole surrounding piece (510) is placed corresponding to the second shoe sole forming surface (210) so that the shoe sole surrounding piece (510) is adsorbed on the second shoe sole forming surface (210).

7. The combined molding process according to claim 1, characterized in that: The rear edge of the sole circumference piece (510) and the lower edge of the upper circumference piece (520) are arranged in an overlapping manner and are bonded together.

8. The combined molding process according to claim 1, characterized in that: The first upper molding surface (120) and the first sole molding surface (110) are both provided with a plurality of third air suction holes; The step of attaching the upper shoe piece to the first upper molding surface (120) and the first sole molding surface (110) comprises: Placing the upper shoe piece in contact with the first upper molding surface (120) and the first sole molding surface (110); The third suction hole is vacuumed, and the upper shoe piece is adsorbed on the first upper molding surface (120) and the first sole molding surface (110).

9. The combined molding process according to claim 8, characterized in that: The step of placing the upper shoe piece in contact with the first upper molding surface (120) and the first sole molding surface (110) comprises: Providing a clamping frame, wherein the clamping frame is provided with an opening; Connecting the upper shoe piece to the clamping frame to cover the opening; The clamping frame is close to the first upper mold (100), the first upper molding surface (120) and the first sole molding surface (110) pass through the opening and abut against the upper shoe piece, and the upper shoe piece is kept taut.

10. The combined molding process according to claim 8, characterized in that: The step of placing the upper shoe piece in contact with the first upper molding surface (120) and the first sole molding surface (110) comprises: Providing a fitting piece, the fitting piece having a fitting surface adapted to the first upper molding surface (120); The upper shoe piece is covered on the first shoe upper molding surface (120), and the fitting surface of the fitting piece is embedded in the first shoe upper molding surface (120).

11. A footwear accessory, characterized in that It is manufactured by the combined molding process as described in any one of claims 1 to 10.

12. Shoes, characterized in that Comprising the footwear accessory of claim 11.

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