Sole forming mold with double-layer structure

Abstract

The utility model provides a sole forming die with a double-layer structure, which comprises an upper die and a lower die, the rear sides of the upper die and the lower die are rotatably connected, the upper die is provided with an upper cavity, the lower die is provided with a lower cavity, the sole forming die further comprises an inner shoe die arranged in the upper cavity and the lower cavity, and the inner shoe die comprises a sole part and a vamp part. The vamp part is composed of a surrounding upper and a toe cap, and a welt is formed on the upper side of the vamp part; an annular sealing surface I is formed at the edge of the welt, and an annular sealing surface II which is correspondingly and hermetically matched with the sealing surface I is arranged on the inner side wall of the upper cavity; a positioning groove which penetrates through the upper side of the upper die and is communicated with the upper cavity is formed in the upper die and is positioned on the inner side of the sealing surface II; the inner shoe mold is provided with a positioning part protruding upwards, and the positioning part is connected with the positioning groove in a matched mode; and the outer side wall of the inner shoe mold and the inner side walls of the upper cavity and the lower cavity are arranged at intervals. An inner shoe mold is arranged between an upper mold and a lower mold to assist in forming of a vamp with a high upper and a high toe cap.

Description

Technical Field

[0001] This utility model relates to the field of shoe sole forming mold technology, and a double-layer shoe sole forming mold. Background Technology

[0002] Compression molding is one of the most widely used processes in shoe sole production. The core principle of this process is to place the shoe material blank between the upper and lower molds of the mold, and apply high temperature and high pressure to make the shoe material blank melt, vulcanize and fit into the mold cavity to form a shoe sole product that meets the design requirements.

[0003] In the prior art, there are various molds used for shoe sole molding. For example, Chinese utility model patent with patent authorization announcement number CN206703502U discloses a shoe sole mold, including a first template and a second template that are interlocked by a hinge shaft. The first template is provided with a shoe sole punch, and the second template is provided with a concave mold that cooperates with the punch to form a shoe sole model.

[0004] However, the existing shoe sole molds described above are designed primarily for ordinary shoe soles that are nearly plate-shaped and thin. The cavity depth is shallow and the edge structure is simple, which can only meet the molding requirements of flat or shallow curved shoe soles. They cannot be adapted to the molding of shoe soles with high edge support and a toe cap. Utility Model Content

[0005] In view of the problems pointed out in the background art, this utility model proposes a double-layer shoe sole forming mold to solve the above-mentioned technical problems.

[0006] The technical solution of this utility model is implemented as follows:

[0007] A double-layer shoe sole molding die includes an upper die and a lower die, which are rotatably connected at their rear sides. The upper die has an upper cavity, and the lower die has a lower cavity.

[0008] It also includes an inner shoe mold set in the upper cavity and the lower cavity. The inner shoe mold includes a sole part and an upper part. The upper part is composed of a gusset and a toe cap. The upper side of the upper part forms the shoe opening.

[0009] The edge of the shoe opening forms an annular sealing surface one, and the inner wall of the upper cavity is provided with an annular sealing surface two that corresponds to and seals with the sealing surface one.

[0010] The upper mold is provided with a positioning groove that runs through its upper side and connects to the upper cavity. The positioning groove is located inside the sealing surface two.

[0011] The inner shoe mold has an upwardly protruding positioning part, which is adapted to and connected to the positioning groove;

[0012] The outer side wall of the inner shoe mold is spaced apart from the inner side walls of the upper and lower cavities.

[0013] The present invention is further provided in that the upper side of the positioning part is provided with a limiting groove that runs through its left and right sides, and a limiting rod is provided in the positioning groove along the left and right direction. The limiting rod cooperates with the limiting groove to prevent the inner shoe mold from moving in the front and back direction.

[0014] The present invention is further configured such that a locking tube is provided on the upper side of the positioning part along the left-right direction, a locking ring is provided on the upper side of the upper mold and is coaxial with the locking tube, and a locking rod is also included that is inserted into the locking tube and the locking ring.

[0015] The present invention is further configured such that there are two locking rings, which are respectively disposed on the left and right sides of the upper mold.

[0016] The present invention is further configured such that a crossbar is provided on the positioning part along the left and right direction, and a pull rod connecting the crossbar and the locking tube is also included.

[0017] The present invention is further provided that the front end of the upper side of the positioning part is provided with an insertion hole for inserting the rocker arm.

[0018] The present invention is further configured such that a positioning post is provided on the upper side of the lower mold, and a positioning hole corresponding to and connected to the positioning post is provided on the lower side of the upper mold.

[0019] The present invention is further configured such that the rear side of the upper mold is provided with a hinge part, the hinge part is provided with a hinge hole, and the lower mold is provided with a hinge post that is rotatably connected to the hinge hole.

[0020] The present invention is further configured such that the lower mold has two lower cavities spaced apart on the left and right sides, and the upper mold has two upper cavities.

[0021] The present invention is further provided that the front sides of the upper mold and the lower mold are respectively provided with lifting rings.

[0022] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0023] The double-layer shoe sole forming mold provided by this utility model has an inner shoe mold set between the upper mold and the lower mold to assist in the forming of shoe uppers with higher gussets and toe caps.

[0024] During operation, the shoe material blank is placed between the inner mold and the lower mold. After the upper and lower molds are closed, the positioning part of the inner mold engages with the positioning groove of the upper mold, restricting the horizontal movement of the inner mold. The sealing surface one of the inner mold abuts against the sealing surface two of the upper mold, forming a sealing fit and restricting the upward movement of the inner mold. Then, under high temperature and high pressure, the shoe material blank melts and vulcanizes, allowing the blank to enter the cavity formed between the inner mold and the upper and lower cavities, thus obtaining the formed shoe sole.

[0025] To keep the inner shoe mold stable during the molding process, the inner shoe mold is restricted from moving in the front-to-back direction and from moving upward by the cooperation of the limiting rod and the limiting groove; the position of the inner shoe mold is further locked by the cooperation of the locking tube, the locking ring and the locking rod, restricting the movement of the inner shoe mold in the front-to-back direction and restricting the movement of the inner shoe mold upward. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0028] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0029] Figure 3 This is an exploded view of the present invention.

[0030] Figure 4 This is a schematic diagram of the upper mold of this utility model.

[0031] Figure 5 This is a schematic diagram of the structure of the inner shoe mold of this utility model.

[0032] The following are the labels in the attached diagram: Upper mold 1, Lower mold 2, Upper cavity 3, Lower cavity 4, Shoe sole 5, Upper 6, Toe cap 7, Shoe opening 8, Sealing surface 1 9, Sealing surface 2 10, Positioning groove 11, Positioning part 12, Restriction groove 13, Restriction rod 14, Locking tube 15, Locking ring 16, Locking rod 17, Horizontal bar 18, Pull rod 19, Insertion hole 20, Positioning post 21, Positioning hole 22, Hinge part 23, Hinge hole 24, Hinge post 25, Lifting ring 26. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] For reference as follows Figures 1-5 The present invention will be described as follows:

[0035] Example: A double-layer shoe sole molding mold is used to solve the molding problem of shoe soles with high edge bulges and toe caps.

[0036] It includes an upper mold 1 and a lower mold 2, which are the load-bearing components of the mold. They are made of rigid materials and have sufficient structural strength to withstand the high temperature and high pressure during the molding process.

[0037] The upper mold 1 and the lower mold 2 are rotatably connected at the rear to ensure smooth mold closing and opening operations. The specific connection structure is as follows:

[0038] The upper mold 1 has a hinge part 23 on its rear side, and a through hinge hole 24 is machined on the hinge part 23. The lower mold 2 has a corresponding hinge post 25. The hinge post 25 and the hinge hole 24 are fitted with a clearance, so that the upper mold 1 can rotate around the hinge post 25 relative to the lower mold 2, thereby completing the mold closing and opening actions.

[0039] The upper mold 1 has an upper concave cavity 3 on its lower surface, and the lower mold 2 has a lower concave cavity 4 on its upper surface. The dimensions of the upper cavity 3 and the lower cavity 4 match the shape of the shoe sole to be formed. The inner surfaces of the upper cavity 3 and the lower cavity 4 are processed with concave and convex patterns corresponding to the surface texture of the shoe sole. These patterns are directly copied onto the surface of the formed shoe sole to ensure that the sole texture is clear and meets the design requirements.

[0040] To improve mold closing accuracy and avoid misalignment of the upper and lower molds during the mold closing process, resulting in deviations in the shoe sole forming, a positioning post 21 is fixedly provided on the upper side of the lower mold 2, and a positioning hole 22 is correspondingly machined on the lower side of the upper mold 1. The positioning post 21 and the positioning hole 22 adopt a transition fit. When the upper and lower molds are closed, the positioning post 21 is inserted into the positioning hole 22 to achieve precise positioning of the upper mold 1 and the lower mold 2, ensuring accurate cavity alignment.

[0041] To facilitate mold handling and mold opening operations, lifting rings 26 are fixedly provided on the front sides of the upper mold 1 and the lower mold 2 respectively. The lifting rings 26 are integrally formed or welded with the same rigid material as the upper and lower molds. Their structural strength meets the force requirements during mold handling and mold opening. Operators can lift the entire mold through the lifting rings 26, or pull the upper mold 1 and the lower mold 2 to rotate around the hinge part to complete the mold opening and closing operations.

[0042] To improve production efficiency and achieve simultaneous molding of a pair of shoe soles, the lower mold 2 has two lower cavities 4 spaced apart along the left and right directions, and the upper mold 1 has two corresponding upper cavities 3. The structure and size of the two cavities are completely identical, ensuring that a pair of shoe soles that meet the requirements can be obtained in one molding process, effectively improving production efficiency and reducing production costs.

[0043] It also includes an inner shoe mold set in the upper cavity 3 and the lower cavity 4. The inner shoe mold is an auxiliary component for forming a shoe sole with a high upper 6 and a toe cap 7. It is embedded between the upper cavity 3 and the lower cavity 4 to position the shoe material blank and form the forming cavity of the upper and toe cap of the shoe sole.

[0044] The inner shoe mold is divided into a sole part 5 and an upper part. The upper part is formed by a single molding of a gusset 6 and a toe cap 7. The height of the gusset 6 is the same as the height of the gusset of the sole to be formed, and the outline of the toe cap 7 matches the outline of the toe of the sole to be formed. The upper side of the upper part forms the shoe opening 8.

[0045] To ensure that the shoe material blank does not leak under high temperature and pressure during the compression molding process, a sealing structure is set between the inner shoe mold and the upper mold 1: the edge of the shoe opening 8 is machined to form an annular sealing surface 9, and the inner side wall of the upper cavity 3 is correspondingly machined with a sealing surface 10 that perfectly matches the size and shape of the sealing surface 9. The sealing surface 10 is also an annular structure. When the upper and lower molds are closed, the sealing surface 9 and the sealing surface 10 fit tightly together to form a surface contact seal, which effectively prevents the shoe material blank from leaking from the gap between the inner shoe mold and the upper cavity 3 during the melting and vulcanization process, thus ensuring the quality of the shoe sole molding.

[0046] To limit the displacement of the inner shoe mold during the compression molding process, ensure the stability of the inner shoe mold position, and thus guarantee the molding accuracy of the sole, the mold is equipped with multiple positioning and locking structures, as follows:

[0047] The upper mold 1 has a positioning groove 11 that runs through its upper side and communicates with the upper cavity 3. The positioning groove 11 is located inside the annular sealing surface 10, and its cross-sectional dimensions match the positioning part 12 of the inner shoe mold.

[0048] The top of the inner shoe mold is provided with an upwardly protruding positioning part 12. The positioning part 12 is located inside the annular sealing surface 9. The positioning part 12 and the positioning groove 11 are in transition fit. When the inner shoe mold is placed into the upper cavity 3, the positioning part 12 is inserted into the positioning groove 11, which directly restricts the displacement of the inner shoe mold in the horizontal direction (left and right, front and back) to ensure that the relative position of the inner shoe mold with the upper cavity 3 and the lower cavity 4 is accurate.

[0049] Sealing surface 9 and sealing surface 10 can also restrict the upward movement of the inner shoe mold.

[0050] The outer side wall of the inner shoe mold is spaced apart from the inner side walls of the upper cavity 3 and the lower cavity 4 to form the cavity for shoe sole forming.

[0051] The upper side of the positioning part 12 is machined with a limiting groove 13 that runs through its left and right sides. The limiting groove 13 is a through groove structure, and its length is consistent with the left and right width of the positioning part 12. A limiting rod 14 is fixedly installed in the positioning groove 11 along the left and right direction. The two ends of the limiting rod 14 are fixedly connected to the side wall of the upper mold 1, and its axis is consistent with the axis of the limiting groove 13. When the upper and lower molds are closed, the limiting rod 14 just enters the limiting groove 13. Through the cooperation of the limiting rod 14 and the limiting groove 13, the movement of the inner shoe mold in the front and back direction is further restricted, so as to prevent the inner shoe mold from shifting back and forth due to force during the molding process.

[0052] A tubular locking tube 15 is fixedly provided on the upper side of the positioning part 12 along the left-right direction. The locking tube 15 is a hollow tubular structure. A locking ring 16 coaxial with the locking tube 15 is provided on the upper side of the upper mold 1. The locking ring 16 is an annular structure with an inner diameter that is the same as the inner diameter of the locking tube 15. The locking ring 16 is fixedly mounted on the upper mold 1 and is an integral structure with the upper mold 1. The mold also includes a locking rod 17. The diameter of the locking rod 17 matches the inner diameter of the locking tube 15 and the locking ring 16. After the inner shoe mold is positioned, the locking rod 17 is inserted into the locking tube 15 and the locking ring 16 to lock and fix the inner shoe mold to the upper mold 1, further restricting the displacement of the inner shoe mold in the front-back direction and the up-down direction, and ensuring the positional stability of the inner shoe mold during the molding process.

[0053] To improve the locking effect, two locking rings 16 are provided, which are symmetrically arranged on the left and right sides of the upper mold 1 to enhance the reliability of the locking structure.

[0054] To facilitate the placement, movement, and demolding of the inner shoe mold after the sole is formed, the mold is equipped with a special auxiliary structure:

[0055] The positioning part 12 is provided with a horizontal bar 18 along the left and right directions, and also includes a pull rod 19 connecting the horizontal bar 18 and the locking tube 15. The pull rod 19 is made of rigid material and has sufficient load-bearing capacity. The operator can manually lift the inner shoe mold by pulling the pull rod 19, so as to realize the movement and placement of the inner shoe mold, as well as the operation of removing the inner shoe mold from the molded shoe sole after the sole is formed. The structure is simple and the operation is convenient.

[0056] An insertion hole 20 is machined on the upper side front end of the positioning part 12 (i.e., near the front end of the upper mold 1). The insertion hole 20 is a blind hole structure, and its size matches the diameter of a commonly used lever-shaped pry bar, facilitating the insertion of the pry bar. After the sole molding is completed and the upper mold 1 is opened, the operator can insert the lever-shaped pry bar into the insertion hole 20. By pulling the pry bar forward, the front end of the inner shoe mold is first dislodged from the inside of the molded sole using the lever principle. Then, the inner shoe mold is pulled by the pull rod 19, causing the rear end of the inner shoe mold to dislodge from the toe cap 7 of the sole. Finally, the entire inner shoe mold is removed from the molded sole, effectively solving the problem of the inner shoe mold being tightly attached to the molded sole and difficult to demold, and avoiding damage to the sole molding structure during demolding.

[0057] The specific operating steps and cooperation principle of the mold of this utility model are as follows:

[0058] First, rotate the upper mold 1 upward around the hinge post 25 to open the mold. Then, lift the inner shoe mold through the pull rod 19 and place it above the lower cavity 4 of the lower mold 2, ensuring that the sole part 5 of the inner shoe mold is aligned with the bottom of the lower cavity 4. At the same time, make the positioning part 12 of the inner shoe mold initially aligned with the positioning groove 11 of the upper mold 1.

[0059] The pre-prepared shoe material blank is placed between the inner shoe mold and the lower cavity 4 of the lower mold 2. The amount of blank is precisely controlled according to the thickness of the sole and the volume of the cavity to avoid waste due to too much blank or incomplete molding due to too little blank.

[0060] The upper mold 1 is pushed to rotate downward around the hinge post 25, so that the upper mold 1 and the lower mold 2 are closed. During the mold closing process, the positioning post 21 on the lower mold 2 is inserted into the positioning hole 22 of the upper mold 1 to achieve precise positioning of the upper and lower molds. At the same time, the positioning part 12 of the inner shoe mold is inserted into the positioning groove 11 of the upper mold 1, and the sealing surface 9 of the inner shoe mold is tightly fitted with the sealing surface 10 of the upper mold 1 to form a sealing fit, which restricts the upward movement and horizontal displacement of the inner shoe mold.

[0061] After the mold is closed, the locking rod 17 is inserted into the locking tube 15 and the locking ring 16 to lock and fix the inner shoe mold to the upper mold 1. At this time, the limiting rod 14 in the positioning groove 11 enters the limiting groove 13 in the positioning part 12 to further restrict the movement of the inner shoe mold in the front and back directions, ensuring that the position of the inner shoe mold is completely fixed during the molding process and avoiding displacement due to force.

[0062] After the mold is locked, it is sent into the molding equipment and a preset high temperature and high pressure are applied. The shoe material blank melts and vulcanizes under high temperature. Under high pressure, the molten shoe material blank fully fills the molding cavity formed between the inner shoe mold and the upper cavity 3 and the lower cavity 4. At the same time, the texture on the surface of the upper cavity 3 and the lower cavity 4 is replicated to complete the molding of the shoe sole.

[0063] After molding is completed, first pull the locking rod 17 out of the locking tube 15 and locking ring 16 to release the locking of the inner shoe mold; then pull the upper mold 1 upward by lifting ring 26 to open the mold; then insert the rocker arm into the insertion hole 20 of the positioning part 12, and pull the rocker arm forward to make the front end of the inner shoe mold come out of the molded sole; then pull the inner shoe mold by pulling rod 19 to make the rear end of the inner shoe mold come out of the sole cover 7, and finally remove the inner shoe mold; finally, remove the molded sole from the lower cavity 4 to complete one molding operation.

[0064] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0065] The sole 5, upper 6, and toe cap 7 of the inner shoe mold are precisely matched with the corresponding structures of the sole to be formed, providing precise cavity support for the forming of the upper and toe cap, ensuring the forming integrity and contour accuracy of this type of structure, and solving the problem that the existing mold cavity structure is simple and cannot be adapted to the forming of high and deep uppers and three-dimensional toe caps.

[0066] The cooperation between the positioning part 12 and the positioning groove 11 restricts the horizontal displacement of the inner shoe mold, the cooperation between the limiting rod 14 and the limiting groove 13 restricts the front and rear displacement of the inner shoe mold, and the cooperation between the locking tube 15, the locking ring 16 and the locking rod 17 realizes the locking and fixing of the inner shoe mold. The synergistic effect of multiple structures ensures the stability of the inner shoe mold during the high temperature and high pressure molding process, avoids the shoe sole forming deviation caused by displacement, and improves the forming accuracy.

[0067] The tight fit between sealing surface 9 and sealing surface 10 effectively prevents leakage of molten shoe material, ensures that the shoe material blank fully fills the cavity, avoids defects such as incomplete molding and missing material at the edges, and guarantees the molding quality of the shoe sole.

[0068] The pull rod 19 facilitates the picking up, placing, and moving of the inner shoe mold; the insertion hole 20, in conjunction with the rocker arm, enables convenient demolding of the inner shoe mold; the lifting ring 26 facilitates mold handling and opening; the dual-cavity design improves production efficiency; and the overall structural design conforms to production operation habits, reduces the labor intensity of operators, and improves production efficiency.

[0069] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A double-layer shoe sole molding die, comprising an upper die and a lower die, the upper die and the lower die being rotatably connected at their rear sides, the upper die having an upper cavity and the lower die having a lower cavity, characterized in that: It also includes an inner shoe mold set in the upper cavity and the lower cavity. The inner shoe mold includes a sole part and an upper part. The upper part is composed of a gusset and a toe cap. The upper side of the upper part forms the shoe opening. The edge of the shoe opening forms an annular sealing surface one, and the inner wall of the upper cavity is provided with an annular sealing surface two that corresponds to and seals with the sealing surface one. The upper mold is provided with a positioning groove that runs through its upper side and connects to the upper cavity. The positioning groove is located inside the sealing surface two. The inner shoe mold has an upwardly protruding positioning part, which is adapted to and connected to the positioning groove; The outer side wall of the inner shoe mold is spaced apart from the inner side walls of the upper and lower cavities.

2. The double-layer shoe sole forming mold according to claim 1, characterized in that: The upper side of the positioning part is provided with a limiting groove that runs through its left and right sides. A limiting rod is provided in the positioning groove along the left and right direction. The limiting rod cooperates with the limiting groove to prevent the inner shoe mold from moving in the front and back direction.

3. The double-layer shoe sole forming mold according to claim 1, characterized in that: The positioning part is provided with a locking tube on the upper side along the left and right direction, and the upper mold is provided with a locking ring coaxial with the locking tube on the upper side. It also includes a locking rod inserted into the locking tube and the locking ring.

4. The double-layer shoe sole forming mold according to claim 3, characterized in that: The locking ring is provided in two parts, which are respectively located on the left and right sides of the upper mold.

5. The double-layer shoe sole forming mold according to claim 3, characterized in that: The positioning part is provided with a horizontal bar along the left and right direction, and also includes a pull rod connecting the horizontal bar and the locking tube.

6. The double-layer shoe sole forming mold according to claim 1, characterized in that: The upper side of the positioning part is provided with an insertion hole for inserting a rocker arm.

7. The double-layer shoe sole forming mold according to claim 1, characterized in that: The lower mold has a positioning post on its upper side, and the upper mold has a positioning hole on its lower side that is connected to the positioning post.

8. The double-layer shoe sole forming mold according to claim 1, characterized in that: The upper mold has a hinge part on its rear side, and a hinge hole is provided on the hinge part. The lower mold has a hinge column that is rotatably connected to the hinge hole.

9. The double-layer shoe sole forming mold according to claim 1, characterized in that: The lower mold has two lower cavities spaced apart on the left and right, and the upper mold has two upper cavities.

10. A double-layer shoe sole forming mold according to claim 1, characterized in that: The upper and lower molds are each provided with a lifting ring on their front sides.

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