An integrally formed mold for a sole with a built-in metal support plate and a forming method

Abstract

This application relates to the technical field of sole molding, and particularly relates to an integral molding die for a sole with an internal metal support plate and a molding method. An integral molding die for a sole with an internal metal support plate includes a lower die base and an upper die base covering the lower die base. The lower die base / upper die base has a first injection hole. A molding cavity is formed between the inner cavities of the lower die base and the upper die base. An installation frame is provided on the lower end surface of the lower die base. A lifting plate located below the lower die base is slidably connected to the installation frame. The lifting plate is provided with a plurality of positioning columns slidably penetrating through the bottom wall of the lower die base. A positioning blind hole is formed on the lower end surface of the support plate. The upper end of the positioning column is inserted into the positioning blind hole. A second injection hole is axially formed on the upper end surface of the positioning column. This application has the effect of improving the molding quality of the sole.

Description

Technical Field

[0001] This application relates to the technical field of sole molding, and particularly relates to a sole integrated molding die with an internal metal support plate and a molding method thereof. Background Art

[0002] In the prior art, in order to enhance the toughness and strength of the sole, during the sole manufacturing process, a support plate made of a metal material is usually added in the middle of the sole, thereby enhancing the toughness and strength of the sole. When manufacturing such a sole, the sole is divided into an upper sole and a lower sole. The upper sole and the lower sole are molded separately, and then the support plate is placed between the upper sole and the lower sole, and the three are fixed by bonding or hot pressing and gluing.

[0003] However, for soles formed by bonding or hot pressing and gluing, there are cases of glue separation and cracking, which affect the overall strength of the sole. Moreover, when installing the support plate between the upper sole and the lower sole, there are relatively high precision requirements for the installation position of the support plate. If there is a position deviation during the installation of the support plate, after subsequent bonding or hot pressing and gluing to form the sole, the molding quality of the sole is poor, so further improvement is needed. Summary of the Invention

[0004] In order to improve the molding quality of the sole, one of the purposes of this application is to provide a sole integrated molding die with an internal metal support plate.

[0005] The sole integrated molding die with an internal metal support plate provided by this application adopts the following technical solution:

[0006] A sole integrated molding die with an internal metal support plate includes a lower die base and an upper die base covering the lower die base. The lower die base / upper die base has a first injection hole. A molding cavity is formed between the inner cavities of the lower die base and the upper die base. An installation frame is arranged on the lower end surface of the lower die base. A lifting plate located below the lower die base is slidably connected to the installation frame. The lifting plate is provided with a plurality of positioning columns slidably passing through the bottom wall of the lower die base. A positioning blind hole is opened on the lower end surface of the support plate. The upper end of the positioning column is inserted into the positioning blind hole, and a second injection hole is axially opened on the upper end surface of the positioning column.

[0007] By adopting the above technical solution, initially, the lifting plate moves upward so that the positioning column slides through the bottom wall of the lower die base and extends into the forming cavity. The worker aligns the positioning blind hole of the support plate with the positioning column so that the upper end of the positioning column is inserted into the positioning blind hole, thereby supporting the support plate. When the upper die base is closed, the support plate can be suspended in the forming cavity. Then, the forming material is injected into the forming cavity through the first injection hole. After the sole is formed and solidified, the lifting plate moves downward to drive the positioning column to descend, so that the positioning column slides out of the bottom surface of the sole. During the downward movement of the positioning column, the forming material is poured into the positioning hole formed by the positioning column through the second injection hole to block the positioning hole, so that the obtained sole can completely wrap the support plate, thereby realizing the integral molding of the sole and improving the molding quality of the sole.

[0008] Preferably, a cutting knife is convexly arranged on the outer wall of the positioning column.

[0009] By adopting the above technical solution, after the sole is formed and solidified, during the downward movement of the positioning column, the cutting knife scratches the inner peripheral wall of the positioning hole, thereby improving the roughness of the inner peripheral wall of the positioning hole and increasing the contact area between the poured filler and the sole, thereby improving the adhesion effect of the poured filler on the sole.

[0010] Preferably, the positioning column is provided with a heating member for heating the cutting knife.

[0011] By adopting the above technical solution, the positioning column is provided with a heating member for heating the cutting knife, so that the cutting knife can soften the sole material while scratching the inner peripheral wall of the positioning hole. On the one hand, it improves the smoothness of the cutting knife sliding. On the other hand, it deepens and widens the cut marks, further improving the roughness of the inner peripheral wall of the positioning hole and the adhesion effect of the poured filler, thereby improving the overall molding quality and stability of the sole.

[0012] Preferably, a plurality of cutting knives are provided and distributed around the axis of the positioning column.

[0013] By adopting the above technical solution, a plurality of cutting knives are provided and evenly distributed around the axis of the positioning column, which can comprehensively scratch the inner peripheral wall of the positioning hole during the downward movement of the positioning column after the sole is formed and solidified. Compared with a single cutting knife, multiple groups of cutting knives can improve the roughness of the inner peripheral wall of the positioning hole, thereby significantly increasing the adhesion force of the poured filler to the contact surface of the sole.

[0014] Preferably, the positioning column has an installation cavity, a knife groove communicating with the installation cavity is radially opened on the outer peripheral wall of the positioning column, the cutting knife is radially slidably connected to the knife groove, and the positioning column is provided with an adjusting mechanism for adjusting the sliding position of the cutting knife.

[0015] By adopting the above technical solution, an installation cavity is arranged inside the positioning post, and a cutter groove communicating with the installation cavity is opened on the outer peripheral wall, so that the cutting tool can slide radially, and the position of the cutting tool is adjusted in cooperation with the adjusting mechanism. Initially, the adjusting mechanism controls the cutting tool to protrude from the outer wall of the positioning post. After the sole is formed and solidified and during the downward movement of the positioning post, the cutting tool scratches the inner peripheral wall of the positioning hole. When the positioning post is about to protrude from the sole, the adjusting mechanism controls the cutting tool to be received in the cutter groove, so that the lower end of the scratch does not extend out of the lower end surface of the sole, significantly increasing the fixing effect between the perfusion filler and the sole.

[0016] Preferably, the positioning post is provided with a fixed injection pipe built in the installation cavity. The upper part of the fixed injection pipe is fixedly penetrated through the upper end surface of the positioning post, and the upper end of the fixed injection pipe is inserted into the positioning blind hole. The adjusting mechanism includes a movable injection pipe built in the installation cavity and axially slidably connected to the positioning post, a hinge rod with one end hinged to the cutting tool and the other end hinged to the outer wall of the movable injection pipe, and an injection pipe driving assembly for driving the movable injection pipe to slide. The movable injection pipe is slidably sleeved on the fixed injection pipe, and the upper end pipe orifice of the fixed injection pipe is the second injection hole.

[0017] By adopting the above technical solution, the cooperation between the fixed injection pipe and the movable injection pipe can ensure the smooth injection of the molding material into the positioning hole. When the movable injection pipe axially slides under the action of the injection pipe driving assembly, the position of the cutting tool is adjusted by using the hinge rod transmission principle, and the state of the cutting tool extending or retracting can be accurately controlled.

[0018] Preferably, a sliding groove communicating with the installation cavity and located below the lower mold base is axially opened on the outer wall of the lower part of the positioning post. The injection pipe driving assembly includes a first sliding plate fixedly connected to the outer wall of the movable injection pipe and slidably penetrating through the sliding groove, and an injection pipe cylinder with the cylinder body fixedly connected to the lifting plate. The piston rod of the injection pipe cylinder is fixedly connected to the first sliding plate.

[0019] By adopting the above technical solution, the piston rod of the injection pipe cylinder drives the first sliding plate to slide along the sliding groove, thereby driving the movable injection pipe to axially move relative to the positioning post, realizing the precise control of the sliding position of the cutting tool, ensuring that the cutting tool can extend or retract at an appropriate time, and effectively adjusting the interaction between the cutting tool and the sole molding material.

[0020] Preferably, a sliding groove communicating with the installation cavity and located below the lower mold base is axially opened on the outer wall of the lower part of the positioning post. The injection pipe driving assembly includes a second sliding plate fixedly connected to the outer wall of the movable injection pipe and slidably penetrating through the sliding groove, a touch rod fixedly connected to the lower end surface of the lower mold base and located directly above the second sliding plate, and a spring built in the installation cavity and fixedly connected between the positioning post and the movable injection pipe. When the positioning post moves up in place, the touch rod abuts against the second sliding plate to drive the movable injection pipe to move downward relative to the positioning post, and the cutting tool is pushed by the hinge rod to slide and protrude from the outer peripheral wall of the positioning post. At this time, the spring is elastically deformed and has elastic potential energy.

[0021] By adopting the above technical solution, when the positioning post moves upward in place, the trigger rod abuts against the second sliding plate, thereby driving the movable injection pipe to move downward relative to the positioning post. By means of the hinge rod, the cutting knife is pushed to slide out and protrude from the outer peripheral wall of the positioning post. The spring undergoes elastic deformation during this process to store elastic potential energy. After the sole is formed and solidified, the lifting plate moves downward to drive the positioning post to descend, and the spring releases the elastic potential energy to push the movable injection pipe to move upward relative to the positioning post. The cutting knife is pulled back into the knife groove through the hinge rod, facilitating the positioning post to protrude from the lower end face of the sole.

[0022] Preferably, the positioning post is rotatably connected to the lifting plate around its own axis, and the lifting plate or the lower die base is provided with a rotating assembly for driving the positioning post to rotate.

[0023] By adopting the above technical solution, after the sole is formed and solidified, during the downward movement of the positioning post, the rotating assembly drives the positioning post to rotate around its own axis, thereby driving the cutting knife to rotate, so that the scratches scraped by the cutting knife are spiral, increasing the contact area between the perfusion filler and the sole, and thus improving the adhesion effect of the perfusion filler on the sole.

[0024] In order to improve the molding quality of the sole, the second object of the present application is to provide a molding method for an integral molding die of a sole with an internal metal support plate.

[0025] A molding method for an integral molding die of a sole with an internal metal support plate includes the following steps:

[0026] Step S1: Clean the prepared support plate. The lifting plate moves upward so that the positioning post slides through the bottom wall of the lower die base and extends into the molding cavity, and release agents are applied to the inner walls of the lower die base and the upper die base.

[0027] Step S2: Align the positioning blind hole of the support plate with the positioning post so that the upper end of the positioning post is inserted into the positioning blind hole, thereby supporting the support plate.

[0028] Step S3: Close the upper die base.

[0029] Step S4: Inject molding materials into the molding cavity through the first injection hole. After the sole is formed and solidified, the lifting plate moves downward to drive the positioning post to descend, so that the positioning post slides out of the bottom surface of the sole. During the downward movement of the positioning post, molding materials are injected into the positioning hole formed by the positioning post through the second injection hole to block the positioning hole, so that the obtained sole can completely wrap the support plate.

[0030] Step S5: Demold.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] 1. Initially, the lifting plate moves upward so that the positioning column slides through the bottom wall of the lower die base and extends into the forming cavity. The worker aligns the positioning blind hole of the support plate with the positioning column so that the upper end of the positioning column is inserted into the positioning blind hole, thereby supporting the support plate. When the upper die base is closed, the support plate can be suspended in the forming cavity. Then, the forming material is injected into the forming cavity through the first injection hole. After the sole is formed and solidified, the lifting plate moves downward to drive the positioning column to descend, so that the positioning column slides out of the bottom surface of the sole. During the downward movement of the positioning column, the forming material is poured into the positioning hole formed by the positioning column through the second injection hole to block the positioning hole, so that the obtained sole can completely wrap the support plate, thereby realizing the integral molding of the sole and improving the molding quality of the sole;

[0033] 3. After the sole is formed and solidified, during the downward movement of the positioning column, the cutter scratches the inner peripheral wall of the positioning hole, thereby increasing the roughness of the inner peripheral wall of the positioning hole and enlarging the contact area between the poured filler and the sole, thus improving the adhesion effect of the poured filler on the sole;

[0034] 3. The positioning column is provided with a heating element for heating the cutter, so that the cutter can soften the sole material while scratching the inner peripheral wall of the positioning hole. On the one hand, it improves the smoothness of the cutter's sliding and reduces the resistance of the cutter. On the other hand, it deepens and widens the scratch marks, further enhancing the roughness of the inner peripheral wall of the positioning hole and the adhesion effect of the poured filler, thereby improving the overall molding quality and stability of the sole. Description of the Drawings

[0035] Figure 1 is the overall structural schematic diagram of a sole integral molding die with a built-in metal support plate in Embodiment 1.

[0036] Figure 2 is the internal structural schematic diagram of the lower die base and the upper die base in Embodiment 1.

[0037] Figure 3 is Figure 2 the partial enlarged schematic diagram at A.

[0038] Figure 4 is the structural schematic diagram of the heating element in Embodiment 2.

[0039] Figure 5 is the structural schematic diagram of the injection tube driving assembly in Embodiment 3.

[0040] Figure 6 is the structural schematic diagram of the rotating assembly in Embodiment 4.

[0041] Description of reference numerals: 1. Lower die base; 11. Mounting frame; 12. Lifting plate; 13. Rodless cylinder; 14. Perforation; 15. Turntable; 2. Upper die base; 21. Bracket; 22. Limit rod; 23. Rotating rod; 3. Support plate; 31. Positioning blind hole; 4. Positioning post; 41. Fixed injection tube; 42. Cutting knife; 43. Knife groove; 44. Sliding groove; 45. First mounting ring; 5. Adjusting mechanism; 51. Movable injection tube; 511. Second mounting ring; 52. Hinge rod; 53. Injection tube driving assembly; 531. First sliding plate; 532. Injection tube cylinder; 533. Second sliding plate; 534. Trigger rod; 535. Spring; 6. Heating element; 61. Heating wire; 62. Heat conduction ring; 63. Heat conduction wire; 7. Rotating assembly; 71. Guide sleeve; 72. Guide rod; 73. Linear guide groove; 74. Spiral guide groove. Detailed implementation manners

[0042] The following further elaborates on this application Figures 1-6 in conjunction with the accompanying drawings.

[0043] Embodiment 1:

[0044] This embodiment of the application discloses a sole integrally formed mold with a built-in metal support plate. Referring to Figure 1 、 Figure 2 , it includes a lower die base 1 and an upper die base 2 covering the lower die base 1. The lower die base 1 and the upper die base 2 are locked by bolts. A forming cavity is formed between the inner cavities of the lower die base 1 and the upper die base 2. The lower die base 1 / upper die base 2 has a first injection hole (not shown in the figure).

[0045] A mounting frame 11 is fixedly connected to the lower end surface of the lower die base 1. The mounting frame 11 is vertically slidably connected with a lifting plate 12 located below the lower die base 1, and multiple lifting plates 12 are provided. The mounting frame 11 is provided with a lifting driving member for driving the lifting plate 12 to slide. In this embodiment, the lifting driving member is a rodless cylinder 13. The cylinder body of the rodless cylinder 13 is fixedly connected to the mounting frame 11, and the slider of the rodless cylinder 13 is fixedly connected to the lifting plate 12. The lifting plate 12 is provided with a positioning post 4 slidably penetrating through the bottom wall of the lower die base 1. In this embodiment, the lower end of the positioning post 4 is fixedly connected to the upper end surface of the lifting plate 12, and a perforation 14 for the positioning post 4 to pass through is formed through the bottom wall of the lower die base 1.

[0046] Referring to Figure 2 、 Figure 3The positioning column 4 has an installation cavity, and the positioning column 4 is provided with a fixed injection tube 41 built into the installation cavity. The upper part of the fixed injection tube 41 is fixedly penetrated through the upper end surface of the positioning column 4, and the upper end of the fixed injection tube 41 is a second injection hole. The lower end surface of the support plate 3 is provided with a positioning blind hole 31, and the upper end of the fixed injection tube 41 is inserted into the positioning blind hole 31. The outer wall of the positioning column 4 is protrudingly provided with a cutter 42. In this embodiment, the cutter 42 is radially slidably connected to the positioning column 4. Specifically, the outer peripheral wall of the positioning column 4 is radially provided with a knife groove 43 connected to the installation cavity, and the knife groove 43 is provided with a plurality of knife grooves and distributed around the axis of the positioning column 4. The cutter 42 is radially slidably connected to the knife groove 43.

[0047] The positioning column 4 is provided with an adjustment mechanism 5 for adjusting the sliding position of the cutter 42. The adjustment mechanism 5 includes a movable injection tube 51 built into the installation cavity and axially slidably connected to the positioning column 4, a hinge rod 52 hinged at one end to the cutter 42 and at the other end to the outer wall of the movable injection tube 51, and an injection tube driving assembly 53 for driving the movable injection tube 51 to slide. The upper part of the movable injection tube 51 is slidably sleeved on the lower part of the fixed injection tube 41, the lower part of the movable injection tube 51 is slidably penetrated through the lifting plate 12, and the lower end of the movable injection tube 51 is externally connected to the injection device. In this embodiment, the lower outer wall of the positioning column 4 is axially provided with a sliding groove 44 connected to the installation cavity and located below the lower mold base 1, and the sliding groove 44 is located above the lifting plate 12. The injection pipe driving assembly 53 includes a first slide plate 531 fixedly connected to the outer wall of the movable injection pipe 51 and slidably inserted into the sliding groove 44, and an injection pipe cylinder 532 whose cylinder body is fixedly connected to the upper end surface of the lifting plate 12, and the piston rod of the injection pipe cylinder 532 is fixedly connected to the lower end surface of the first slide plate 531.

[0048] The upper end surface of the upper mold base 2 is fixedly connected with a bracket 21, and the bracket 21 is provided with a limit rod 22 which is slidably penetrated through the top wall of the upper mold base 2. The upper part of the limit rod 22 has a threaded section, and the threaded section is threadedly penetrated through the bracket 21. The lower part of the limit rod 22 is a smooth rod penetrated through the top wall of the upper mold base 2. The lower end of the limit rod 22 abuts against the upper end surface of the support plate 3, and the upper end of the limit rod 22 is fixedly connected with a rotating rod 23.

[0049] The embodiment of the present application also discloses a molding method of a sole integral molding mold with a built-in metal support plate, comprising the following steps:

[0050] Step S1, clean the prepared support plate 3, the rodless cylinder 13 drives the lifting plate 12 to move upward so that the positioning column 4 slides through the bottom wall of the lower mold base 1 and extends into the molding cavity, the piston rod of the injection tube cylinder 532 extends to drive the movable injection tube 51 to move upward relative to the positioning column 4, thereby pushing the cutter 42 to slide and extend out of the knife groove 43 through the hinge rod 52, so that the cutting blade of the cutter 42 protrudes from the outer peripheral wall of the positioning column 4, and the release agent is applied to the inner walls of the lower mold base 1 and the upper mold base 2.

[0051] Step S2: Align the positioning blind hole 31 of the support plate 3 with the fixed injection pipe 41 so that the upper end of the fixed injection pipe 41 is inserted into the positioning blind hole 31, thereby supporting the support plate 3.

[0052] Step S3: Close the upper die base 2, lock the lower die base 1 and the upper die base 2 with bolts, and rotate the rotating rod 23 to drive the limiting rod 22 to rotate. The limiting rod 22 moves downward under the action of thread restriction, so that the lower end of the limiting rod 22 abuts against the upper end surface of the support plate 3.

[0053] Step S4: Inject the molding material into the molding cavity through the first injection hole. After the sole is molded and solidified, the rodless cylinder 13 drives the lifting plate 12 to move downward, driving the positioning column 4 to descend. During the descent of the positioning column 4, the cutter 42 scratches the inner peripheral wall of the positioning hole formed by the positioning column 4, thereby improving the roughness of the inner peripheral wall of the positioning hole, and injecting the molding filler into the positioning hole formed by the positioning column 4 through the second injection hole to block the positioning hole. When the positioning column 4 is about to protrude from the sole, the piston rod of the injection pipe cylinder 532 contracts, driving the movable injection pipe 51 to move downward relative to the positioning column 4, and pulling the cutter 42 into the cutter groove 43 through the hinge rod 52, so that the lower end of the scratch does not extend out of the lower end surface of the sole, and it is convenient for the positioning column 4 to contract into the through hole 14.

[0054] Step S5: Demold.

[0055] Embodiment 2:

[0056] The difference from Embodiment 1 is that, referring to Figure 4 , the positioning column 4 is provided with a heating member 6 for heating the cutter 42. In this embodiment, the heating member 6 includes a heating wire 61 built in the installation cavity and spirally wound around the outer peripheral wall of the movable injection pipe 51, a heat conduction ring 62 fixedly sleeved on the movable injection pipe 51, and a heat conduction wire 63 connected between the heat conduction ring 62 and the cutter 42 to heat the cutter 42. The heating wire 61 heats the cutter 42 through the heat conduction ring 62 and the heat conduction wire 63. In this embodiment, the molding material is low-density polyethylene, and the molding filler is a low-melting polyolefin elastomer.

[0057] Embodiment 3:

[0058] The difference from Embodiment 1 or Embodiment 2 is that, referring to Figure 5, in this embodiment, a first mounting ring 45 is fixedly connected to the inner peripheral wall of the positioning post 4, and a second mounting ring 511 is fixedly connected to the outer peripheral wall of the movable injection tube 51. The injection tube driving assembly 53 includes a second sliding plate 533 fixedly connected to the outer wall of the movable injection tube 51 and slidably passing through the sliding groove 44, a trigger rod 534 fixedly connected to the lower end surface of the lower mold base 1 and located directly above the second sliding plate 533, and a spring 535 disposed inside the installation cavity and fixedly connected between the positioning post 4 and the movable injection tube 51. One end of the spring 535 is fixedly connected to the first mounting ring 45, and the other end of the spring 535 is fixedly connected to the second mounting ring 511. Under normal conditions, the spring 535 forces the movable injection tube 51 to move upward relative to the positioning post 4, causing the cutting blade 42 to retract into the blade groove 43. When the positioning post 4 moves upward in place, the trigger rod 534 abuts against the second sliding plate 533, driving the movable injection tube 51 to move downward relative to the positioning post 4, and pushing the cutting blade 42 to slide out and protrude from the outer peripheral wall of the positioning post 4 through the hinge rod 52. At this time, the spring 535 undergoes elastic deformation and has elastic potential energy. After the sole is formed and solidified, the lifting plate 12 moves downward, driving the positioning post 4 to descend. The spring 535 releases the elastic potential energy, pushing the movable injection tube 51 to move upward relative to the positioning post 4, and pulling the cutting blade 42 to be received in the blade groove 43 through the hinge rod 52, facilitating the upper end of the positioning post 4 to contract into the through hole 14.

[0059] Embodiment 4:

[0060] The difference from Embodiment 1 or Embodiment 2 is that with reference to Figure 6 , in this embodiment, a turntable 15 is rotatably connected to the upper end surface of the lifting plate 12, the positioning post 4 is coaxially fixed to the turntable 15, and the movable injection tube 51 passes through the turntable 15 and the lifting plate 12. The lifting plate 12 or the lower mold base 1 is provided with a rotating assembly 7 for driving the positioning post 4 to rotate. In this embodiment, the rotating assembly 7 includes a guiding sleeve 71 fixedly connected to the lower end surface of the lower mold base 1 and located above the first sliding plate 531, and a guiding rod 72 fixedly connected to the outer wall of the positioning post 4 and located above the first sliding plate 531. The positioning post 4 coaxially and slidably passes through the guiding sleeve 71. A linear guiding groove 73 is axially formed on the lower outer wall of the guiding sleeve 71, and a spiral guiding groove 74 that winds around the outer peripheral wall of the guiding sleeve 71 and is spirally arranged is formed at the upper end of the linear guiding groove 73. The guiding rod 72 slidably passes through the linear guiding groove 73 and the spiral guiding groove 74. In other embodiments, the rotating assembly 7 can adopt a motor and a gear set to drive the turntable 15 to rotate.

[0061] After the positioning post 4 moves upward in place, the guiding rod 72 is located at the uppermost end of the spiral guiding groove 74. After the sole is formed and solidified, during the downward movement of the positioning post 4 relative to the guiding sleeve 71, the guiding rod 72 rotates around its own axis relative to the guiding sleeve 71 under the limiting action of the spiral guiding groove 74, thereby driving the cutting blade 42 to rotate, making the scratch marks scraped by the cutting blade 42 spiral-shaped, increasing the contact area between the perfusion filler and the sole, and thus improving the adhesion effect of the perfusion filler on the sole.

[0062] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A one-piece sole forming mold with a built-in metal support plate, characterized in that: The invention comprises a lower die base (1) and an upper die base (2) covering the lower die base (1), wherein the lower die base (1) and / or the upper die base (2) have a first injection hole, a molding cavity is formed between the inner cavities of the lower die base (1) and the upper die base (2), a mounting frame (11) is provided on the lower end surface of the lower die base (1), the mounting frame (11) is slidably connected to a lifting plate (12) located below the lower die base (1), the lifting plate (12) is provided with a plurality of positioning columns (4) slidably penetrated through the bottom wall of the lower die base (1), and the lower end surface of the support plate (3) is provided with a A positioning blind hole (31), the upper end of the positioning column (4) is inserted into the positioning blind hole (31), and the upper end surface of the positioning column (4) is provided with a second injection hole along the axial direction; a cutter (42) is protrudingly provided on the outer wall of the positioning column (4); the positioning column (4) has a mounting cavity, and a knife groove (43) connected to the mounting cavity is radially provided on the outer peripheral wall of the positioning column (4), the cutter (42) is slidably connected to the knife groove (43) along the radial direction, and the positioning column (4) is provided with an adjustment mechanism (5) for adjusting the sliding position of the cutter (42).

2. The one-piece sole forming mold with a built-in metal support plate according to claim 1, characterized in that: The positioning column (4) is provided with a heating element (6) for heating the cutter (42).

3. The one-piece sole forming mold with a built-in metal support plate according to claim 1, characterized in that: The cutters (42) are provided in plurality and distributed around the axis of the positioning column (4).

4. The one-piece sole forming mold with a built-in metal support plate according to claim 1, characterized in that: The positioning column (4) is provided with a fixed injection tube (41) built into the installation cavity, the upper part of the fixed injection tube (41) is fixedly inserted into the upper end surface of the positioning column (4), and the upper end of the fixed injection tube (41) is inserted into the positioning blind hole (31). The adjustment mechanism (5) comprises a movable injection tube (51) built into the installation cavity and slidably connected to the positioning column (4) along the axial direction, a hinged rod (52) one end of which is hinged to the cutter (42) and the other end of which is hinged to the outer wall of the movable injection tube (51), and an injection tube driving component (53) for driving the movable injection tube (51) to slide. The movable injection tube (51) is slidably sleeved on the fixed injection tube (41), and the upper end of the fixed injection tube (41) is a second injection hole.

5. The one-piece sole forming mold with a built-in metal support plate according to claim 4, characterized in that: The lower outer wall of the positioning column (4) is axially provided with a sliding groove (44) connected to the installation cavity and located below the lower mold base (1); the injection pipe driving assembly (53) comprises a first slide plate (531) fixedly connected to the outer wall of the movable injection pipe (51) and slidably penetrated in the sliding groove (44); and an injection pipe cylinder (532) whose cylinder body is fixedly connected to the lifting plate (12); and a piston rod of the injection pipe cylinder (532) is fixedly connected to the first slide plate (531).

6. The one-piece sole forming mold with a built-in metal support plate according to claim 4, characterized in that: The lower outer wall of the positioning column (4) is provided with a sliding groove (44) connected to the installation cavity and located below the lower die seat (1) along the axial direction. The injection tube driving assembly (53) comprises a second slide plate (533) fixedly connected to the outer wall of the movable injection tube (51) and slidably penetrated in the sliding groove (44), a trigger rod (534) fixedly connected to the lower end surface of the lower die seat (1) and located directly above the second slide plate (533), and a spring (535) built into the installation cavity and fixedly connected between the positioning column (4) and the movable injection tube (51). When the positioning column (4) moves up to the right position, the trigger rod (534) abuts against the second slide plate (533) to drive the movable injection tube (51) to move downward relative to the positioning column (4), and pushes the cutter (42) to slide and protrude out of the outer peripheral wall of the positioning column (4) through the hinge rod (52). At this time, the spring (535) undergoes elastic deformation and has elastic potential energy.

7. The one-piece sole forming mold with a built-in metal support plate according to claim 1, characterized in that: The positioning column (4) is connected to the lifting plate (12) by rotating around its own axis, and the lifting plate (12) or the lower die seat (1) is provided with a rotating component (7) for driving the positioning column (4) to rotate.

8. A method for forming a sole integrally formed mold with a built-in metal support plate according to any one of claims 1 to 7, comprising the following steps: Step S1, cleaning the prepared support plate (3), moving the lifting plate (12) upward so that the positioning column (4) slides through the bottom wall of the lower mold base (1) and extends into the molding cavity, and applying a mold release agent to the inner walls of the lower mold base (1) and the upper mold base (2); Step S2, aligning the positioning blind hole (31) of the support plate (3) with the positioning column (4) so ​​that the upper end of the positioning column (4) is inserted into the positioning blind hole (31), thereby supporting the support plate (3); Step S3, closing the upper mold base (2); Step S4, injecting molding material into the molding cavity through the first injection hole, and after the sole is molded and solidified, the lifting plate (12) moves downward to drive the positioning column (4) downward, so that the positioning column (4) slides off the bottom surface of the sole, and during the downward movement of the positioning column (4), the molding material is poured into the positioning hole formed by the positioning column (4) through the second injection hole to seal the positioning hole, so that the manufactured sole can be fully wrapped on the support plate (3); Step S5: demoulding.

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