Shoe sole integral forming mold and using method thereof

Abstract

The invention relates to the technical field of shoe sole foaming molds, in particular to a shoe sole integral forming mold. A shoe sole integral forming mold comprises an upper mold plate and a lower mold plate, a shoe sole mold plate is arranged at the bottom of the upper mold plate, a mold cavity groove is formed in the top of the lower mold plate, a pair of shoe sole mold cores in sliding fit with the mold cavity groove is arranged in the mold cavity groove, an outsole containing groove for containing an outsole is formed in each shoe sole mold core, and a shoe last groove is formed in the bottom of the mold cavity groove. A detachable shoe last groove is formed in the upper mold plate, a detachable shoe last mold is arranged in the shoe last groove, the two shoe sole mold cores are arranged on the left side and the right side of the shoe last mold respectively, an injection hole and an exhaust hole which are communicated to the cavity are formed in the upper mold plate, a mold opening guide mechanism is arranged between the upper mold plate and the shoe sole mold cores, and the upper mold plate and the shoe sole mold cores are connected through the mold opening guide mechanism. A cavity is formed between the upper template and the lower template; and the two sole mold cores are separated towards two sides during mold opening.

Description

Technical Field

[0001] The invention relates to the technical field of sole foaming moulds, in particular to a sole integral molding mould and a use method thereof. Background Art

[0002] In existing shoe sole production processes, the sole and upper are typically joined by separate manufacturing and subsequent assembly. Sole manufacturing typically begins with injection molding, compression molding, and other processes, followed by polishing and surface treatment. The upper undergoes complex processes such as cutting, multi-component splicing, and sewing. When assembling the outsole with the sole and upper, the outsole is often manually placed in the corresponding position on the sole after the sole is formed and pre-treated. It is then initially secured by applying glue, heating, and pressing before being assembled with the upper. This step-by-step process not only increases the complexity of the production process and lengthens the overall production cycle, but also introduces errors with each manual intervention, impacting the quality of the final product.

[0003] This method of separate production and reassembly has many drawbacks. From the perspective of production efficiency, multiple independent production links and additional assembly steps make the production process lengthy and complicated. For example, after the sole is injection molded, it needs to wait for cooling and shaping, and sewing the upper also consumes a lot of manpower time. In addition, the assembly process involves steps such as gluing and waiting for the glue to solidify, which greatly prolongs the production cycle. According to industry statistics, the traditional process of producing a pair of ordinary sports shoes, from raw material input to finished product output, takes an average of 30%-50% longer than the one-piece molding process, which is difficult to meet the current market demand for rapid production and large-scale supply.

[0004] In terms of connection firmness, traditional processes face severe challenges. When using glue for bonding, the uniformity of glue application, ambient temperature and humidity, and the surface treatment quality of the sole and upper will significantly affect the bonding effect. During actual wear, shoes are frequently bent and subjected to stress, and the glue bonds are prone to debonding. This problem is particularly prominent for shoes used in outdoor sports and high-intensity use scenarios, seriously affecting the service life of the shoes and consumer experience. Although the stitching method is relatively strong, the stitching will to a certain extent destroy the structural integrity of the upper and sole, and there is also a risk of wear and breakage at the junction of the stitching and the sole and upper materials. Summary of the Invention

[0005] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0006] A sole one-piece forming mold comprises an upper template and a lower template. The bottom of the upper template is provided with a sole template, the top of the lower template is provided with a mold cavity groove, a pair of sole mold cores slidingly matched with the mold cavity groove are provided, an outsole placement groove for accommodating the outsole is provided on the sole mold core, the bottom of the mold cavity groove is provided with a last groove, a detachable last mold is provided in the last groove, two sole mold cores are respectively arranged on the left and right sides of the last mold, the upper template is provided with an injection hole and an air extraction hole connected to the cavity, a mold opening guide mechanism is provided between the upper template and the sole mold core and they are connected through the mold opening guide mechanism, when the mold is closed, the two sole mold cores are squeezed toward the middle to form a cavity between the upper template and the lower template; when the mold is opened, the two sole mold cores are separated to both sides.

[0007] Furthermore, a sealing groove is provided on the lower template around the edge of the mold cavity groove, and a sealing ring is provided in the sealing groove to enable the upper template and the lower template to be sealed and matched.

[0008] Furthermore, the lower template is provided with positioning grooves at the notches on the front and rear sides of the mold cavity groove, and a matching guide pressure plate is provided in the positioning groove. The front and rear sides of the sole mold core are provided with guide slides that are pressed by the guide pressure plate and slide with it.

[0009] Furthermore, a positioning column is provided at the bottom of the last groove, a positioning groove corresponding to the positioning column is provided at the bottom of the last mold, a rotating stopper is also provided at the bottom of the last groove on one side of the positioning column, and a rotating buckle corresponding to the rotating stopper is provided at the bottom of the last mold.

[0010] Furthermore, the mold opening guide mechanism includes a mold opening slider inclined in an S-shape at the bottom of the upper template and a mold opening groove corresponding to the mold opening slider on the outer side of the sole mold core. When the mold is closed, the mold opening slider is inserted into the mold opening groove, and the two sole mold cores are squeezed toward the middle, forming a cavity between the upper template and the lower template; when the mold is opened, the mold opening slider is pulled out of the mold opening groove, and the two sole mold cores are separated to both sides.

[0011] A method for using a sole integral molding mold is applicable to any one of the above-mentioned sole integral molding molds and is used in a production process of integrally foaming a sole and connecting it to an upper to produce a finished shoe, specifically comprising the following steps:

[0012] S1: Select a last mold, outsole and upper of appropriate specifications, and put the upper on the last mold;

[0013] S2: Install the last mold with the upper into the last slot and put the outsole in;

[0014] S3: Mold closing, the two sole mold cores are squeezed together to form a cavity between the upper and lower molds;

[0015] S4: evacuate the chamber through the vacuum hole;

[0016] S5: mixing the sole foaming material with nitrogen and heating it until a molten mixture is obtained;

[0017] S6: injecting the molten mixture into the chamber through the main material hole;

[0018] S7: Let it stand until foaming is complete;

[0019] S8: Open the mold. When opening the mold, the two sole mold cores are separated to both sides to obtain the finished shoe.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the invented sole one-piece molding mold and the method of using the same integrate the production processes of the sole and the upper into one-piece molding, reducing the tedious steps of separately making and then assembling the sole and the upper in the traditional process, greatly shortening the production cycle and improving production efficiency; and the chamber can be vacuumed through the vacuum hole, and the foaming material is injected into the chamber under a vacuum environment, which can fully penetrate into the gap between the upper and the last mold and the sole mold core. After foaming and expansion, a tight bonding structure is formed, which greatly enhances the connection strength between the sole and the upper.

[0021] 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

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 It is a structural schematic diagram of the upper template in the present invention.

[0025] Figure 3 It is a structural schematic diagram of the lower template in the present invention.

[0026] Figure 4 It is a structural schematic diagram of the middle last mold of the present invention. DETAILED DESCRIPTION

[0027] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0028] See also Figures 1 to 4 A sole integral molding mold comprises an upper template 1 and a lower template 2. A sole template 3 is provided at the bottom of the upper template 1, and a mold cavity 4 is provided at the top of the lower template 2. A pair of sole mold cores 5 that slide in cooperation with the mold cavity 4 are provided in the mold cavity 4. The sole mold core 5 is provided with an outsole placement groove for accommodating the outsole. A last groove 7 is provided at the bottom of the mold cavity 4. A detachable last mold 8 is provided in the last groove 7. Two sole mold cores 5 are respectively arranged on the left and right sides of the last mold 8. An injection hole 9 and an air extraction hole 10 connected to the cavity are provided on the upper template 1. A mold opening guide mechanism is provided between the upper template 1 and the sole mold core 5 and connected through the mold opening guide mechanism. When the mold is closed, the two sole mold cores 5 are squeezed close to the middle to form a cavity between the upper template 1 and the lower template 2; when the mold is opened, the two sole mold cores 5 are separated to both sides.

[0029] Furthermore, a sealing groove is provided on the lower template 2 around the edge of the mold cavity groove 4, and a sealing ring 11 is provided in the sealing groove to seal the upper template 1 and the lower template 2. Through the setting of the sealing ring 11, the sealing performance of the mold after closing the mold is effectively improved, thereby ensuring the quality of the sole molding.

[0030] Furthermore, the lower mold plate 2 is provided with positioning slots 12 at the notches on the front and rear sides of the mold cavity 4. Matching guide plates 13 are located in the positioning slots 12. Guide slides 14 are located on the front and rear sides of the sole mold core 5, pressed by and slidingly engaged with the guide plates 13. The cooperation between the guide plates 13 and the guide slides 14 allows for precise guidance of the sole mold core 5 during the mold opening and closing process, ensuring the stability and accuracy of the sliding of the sole mold core 5 and further improving the precision of the sole molding.

[0031] Furthermore, a positioning post 15 is provided at the bottom of the last groove 7, and an alignment groove 20 corresponding to the positioning post 15 is provided at the bottom of the last mold 8. A rotation block 16 is also provided at the bottom of the last groove 7, located on one side of the positioning post 15, and a rotation buckle 17 corresponding to the rotation block 16 is provided at the bottom of the last mold 8. This positioning and buckle structure enables the last mold 8 to be quickly and accurately installed in the last groove 7, and the installation is firm, making it easy to replace last molds 8 of different specifications to meet the production needs of different styles of shoes.

[0032] Furthermore, the mold opening guide mechanism includes a mold opening slider 18 tilted in an eight-shaped shape at the bottom of the upper template 1 and a mold opening slot 19 on the outer side of the sole mold core 5 that matches the mold opening slider 18. When closing the mold, the mold opening slider 18 is inserted into the mold opening slot 19, and the two sole mold cores 5 are squeezed toward the middle, forming a cavity between the upper template 1 and the lower template 2; when opening the mold, the mold opening slider 18 is pulled out of the mold opening slot 19, and the two sole mold cores 5 are separated to both sides. The design of the mold opening slider 18 tilted in an eight-shaped shape can provide stable and effective guidance and power during the mold closing and opening process, ensuring that the sole mold core 5 moves according to the predetermined trajectory, thereby improving the reliability and service life of the mold.

[0033] A method for using a sole integral molding mold is applicable to any one of the above-mentioned sole integral molding molds and is used in a production process of integrally foaming a sole and connecting it to an upper to produce a finished shoe, specifically comprising the following steps:

[0034] S1: Preparation

[0035] Select the last mold 8, outsole and upper of appropriate specifications. Put the upper on the last mold 8 accurately to ensure that the upper is flat and wrinkle-free.

[0036] S2: Install the last mold 8 and the outsole

[0037] The last mold 8 with the upper is accurately installed in the last groove 7 of the lower template 2 through the cooperation of the positioning column 15 and the positioning groove 12, the rotating block 16 and the rotating buckle 17. Then the outsole is placed in the outsole placement groove 6 of the sole mold core 5, and the position of the outsole is adjusted so that it fits tightly with the sole mold core 5.

[0038] S3: Mold closing operation

[0039] The mold's clamping mechanism is activated, and the upper mold plate 1 moves downward. Simultaneously, the mold opening slider 18 gradually inserts into the mold opening slot 19, pushing the two sole mold cores 5 toward the center. When the mold is fully closed, a complete cavity is formed between the upper mold plate 1 and the lower mold plate 2. The sealing ring 11 then acts as a seal, ensuring the cavity's tightness.

[0040] S4: Vacuum

[0041] The air in the chamber is extracted through the exhaust hole 10 so that the chamber reaches a predetermined vacuum degree, creating good conditions for subsequent injection and foaming molding.

[0042] S5: Material preparation

[0043] The sole foaming material is mixed with nitrogen in a certain proportion, then heated to a molten state in a heating device and fully stirred to ensure the uniformity and stability of the material.

[0044] S6: Injection

[0045] The molten mixed material is injected into the cavity through the injection hole 9, and the injection speed and pressure are controlled to make the material fill the entire cavity evenly to avoid material accumulation or insufficient filling.

[0046] S7: Foam molding

[0047] After injection, the mold is kept at a certain temperature and pressure to allow the molten mixture to fully foam. During the foaming process, pay close attention to the changes in temperature and pressure to ensure the smooth progress of the foaming process.

[0048] S8: Open the mold and take out the parts

[0049] After foaming is complete, the mold opening device is activated, the upper mold plate 1 moves upward, the mold opening slider 18 is pulled out of the mold opening chute 19, and the two sole mold cores 5 are separated to the sides under the action of their own structure and external force. At this point, the finished shoe can be easily removed from the mold, completing the entire production process.

[0050] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

Claims

1. A sole integral molding mold, comprising an upper mold plate and a lower mold plate, characterized in that: A sole template is provided at the bottom of the upper template, a mold cavity groove is provided at the top of the lower template, a pair of sole mold cores slidingly matched therewith are provided in the mold cavity groove, an outsole placement groove for accommodating the outsole is provided on the sole mold core, a last groove is provided at the bottom of the mold cavity groove, a detachable last mold is provided in the last groove, two sole mold cores are respectively arranged on the left and right sides of the last mold, an injection hole and an air extraction hole connected to the cavity are provided on the upper template, a mold opening guide mechanism is provided between the upper template and the sole mold core and they are connected through the mold opening guide mechanism, when the mold is closed, the two sole mold cores are squeezed toward the middle to form a cavity between the upper template and the lower template; when the mold is opened, the two sole mold cores are separated to both sides.

2. The sole integral molding mold according to claim 1, characterized in that: A sealing groove is provided on the lower template around the edge of the mold cavity groove, and a sealing ring is provided in the sealing groove to enable the upper template and the lower template to be sealed and matched.

3. The sole integral molding mold according to claim 1, characterized in that: The lower template is provided with positioning grooves at the notches on the front and rear sides of the cavity groove, and a matching guide pressure plate is provided in the positioning groove. The front and rear sides of the sole mold core are provided with guide slides that are pressed by the guide pressure plate and slide with it.

4. The sole integral molding mold according to claim 1, characterized in that: A positioning column is provided at the bottom of the last groove, a positioning groove corresponding to the positioning column is provided at the bottom of the last mold, a rotating stopper is also provided at the bottom of the last groove on one side of the positioning column, and a rotating buckle corresponding to the rotating stopper is provided at the bottom of the last mold.

5. The sole integral molding die according to claim 1, characterized in that: The mold opening guide mechanism includes an opening mold slider that is inclined in an eight-shaped shape at the bottom of the upper mold plate and an opening mold chute that corresponds to the opening mold slider on the outer surface of the sole mold core. When the mold is closed, the opening mold slider is inserted into the opening mold chute, and the two sole mold cores are squeezed toward the middle, forming a cavity between the upper mold plate and the lower mold plate; when the mold is opened, the opening mold slider is pulled out of the opening mold chute, and the two sole mold cores are separated to both sides.

6. A method for using a sole integral molding mold, applicable to the sole integral molding mold according to any one of claims 1 to 5, characterized in that: The production process for producing finished shoes by integrally foaming the sole and connecting it to the upper includes the following steps: S1: Take the last mold and outsole, and put the upper on the last mold; S2: Install the last mold with the upper into the last slot and put the outsole in; S3: Mold closing, the two sole mold cores are squeezed together to form a cavity between the upper and lower molds; S4: evacuate the chamber through the evacuation hole; S5: mixing the sole foaming material with nitrogen and heating it until a molten mixture is obtained; S6: injecting the molten mixture into the chamber through the main material hole; S7: Let it stand until foaming is complete; S8: Open the mold. When opening the mold, the two sole mold cores are separated to both sides to obtain the finished shoe.

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