Shoe sole integral forming mold with built-in metal supporting plate and forming method

Abstract

The invention relates to the technical field of shoe sole forming, in particular to a shoe sole integrated forming mold with a built-in metal supporting plate and a forming method.The shoe sole integrated forming mold with the built-in metal supporting plate comprises a lower mold base and an upper mold base covering the lower mold base, and the lower mold base / the upper mold base is provided with a first injection hole; a forming cavity is formed between inner cavities of the lower die base and the upper die base, a mounting frame is arranged on the lower end face of the lower die base and slidably connected with a lifting plate located below the lower die base, the lifting plate is provided with a plurality of positioning columns slidably arranged on the bottom wall of the lower die base in a penetrating mode, and positioning blind holes are formed in the lower end face of a supporting plate. The upper end of the positioning column is inserted into the positioning blind hole, and a second injection hole is formed in the upper end face of the positioning column in the axial direction. The shoe sole forming device has the effect of improving the shoe sole forming quality.

Description

Technical Field

[0001] The present application relates to the technical field of sole molding, and in particular to an integrated molding die and molding method for a sole with a built-in metal support plate. Background Art

[0002] In the prior art, in order to enhance the toughness and strength of the sole, a support plate made of metal material is usually added to the middle of the sole during the sole manufacturing process, 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 formed 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.

[0003] However, this type of sole formed by bonding or hot pressing may debond and crack, which affects the overall strength of the sole. In addition, when the support plate is installed between the upper sole and the lower sole, a relatively high precision requirement is placed on the installation position of the support plate. If a position deviation occurs during the installation of the support plate, the molding quality of the sole will be poor after subsequent bonding or hot pressing to form the sole, and therefore further improvement is needed. Summary of the invention

[0004] In order to improve the molding quality of the sole, one of the purposes of the present application is to provide an integrated sole molding mold with a built-in metal support plate.

[0005] The present application provides a one-piece molding die for a sole with a built-in metal support plate, which adopts the following technical solution: A shoe sole one-piece forming mold with a built-in metal support plate comprises a lower mold base and an upper mold base covering the lower mold base, the lower mold base / upper mold base having a first injection hole, a forming cavity is formed between the inner cavities of the lower mold base and the upper mold base, a mounting frame is provided on the lower end surface of the lower mold base, the mounting frame is slidably connected to a lifting plate located below the lower mold base, the lifting plate is provided with a plurality of positioning columns slidably penetrated through the bottom wall of the lower mold base, a positioning blind hole is provided 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 provided on the upper end surface of the positioning column along the axial direction.

[0006] By adopting the above technical scheme, initially, the lifting plate moves up to allow the positioning column to slide through the bottom wall of the lower mold base and extend into the molding cavity. The staff 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 mold base is closed, the support plate can be suspended in the molding cavity, and then the molding material is injected into the molding cavity through the first injection hole. After the sole is molded and solidified, the lifting plate moves down to drive the positioning column to move down, so that the positioning column slides out of the bottom surface of the sole. During the downward movement of the positioning column, the molding material is poured into the positioning hole formed by the positioning column through the second injection hole to seal the positioning hole, so that the prepared sole can be fully wrapped in the support plate, thereby realizing the one-piece molding of the sole and improving the molding quality of the sole.

[0007] Preferably, a cutting knife is protruding from the outer wall of the positioning column.

[0008] By adopting the above technical solution, after the sole is formed and solidified, during the downward movement of the positioning column, the cutter scratches the inner wall of the positioning hole, thereby increasing the roughness of the inner 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.

[0009] Preferably, the positioning column is provided with a heating element for heating the cutter.

[0010] By adopting the above technical solution, 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 wall of the positioning hole. On the one hand, the smoothness of the cutter's sliding is improved, and on the other hand, the cut is deepened and widened, further improving the roughness of the inner wall of the positioning hole and the adhesion effect of the injection filler, thereby improving the overall molding quality and stability of the sole.

[0011] Preferably, the cutters are provided in plurality and distributed around the axis of the positioning column.

[0012] By adopting the above technical solution, multiple cutters are provided and evenly distributed around the axis of the positioning column, so that after the sole is formed and solidified, the inner wall of the positioning hole can be fully scratched during the downward movement of the positioning column. Compared with a single cutter, multiple sets of cutters can increase the roughness of the inner wall of the positioning hole, thereby significantly increasing the adhesion between the poured filler and the contact surface of the sole.

[0013] Preferably, the positioning column has an installation cavity, the outer peripheral wall of the positioning column is radially provided with a knife groove connected to the installation cavity, the cutter is radially slidingly connected to the knife groove, and the positioning column is provided with an adjustment mechanism for adjusting the sliding position of the cutter.

[0014] By adopting the above technical solution, an installation cavity is provided inside the positioning column, and a knife groove connected to the installation cavity is provided on the outer peripheral wall, so that the cutter can slide in the radial direction, and the position of the cutter is adjusted in cooperation with the adjustment mechanism. Initially, the adjustment mechanism controls the cutter to protrude from the outer wall of the positioning column. After the sole is formed and solidified and during the downward movement of the positioning column, the cutter performs a scratch treatment on the inner peripheral wall of the positioning hole. When the positioning column is about to fall out of the sole, the adjustment mechanism controls the cutter to be stored in the knife groove, so that the lower end of the scratch does not extend out of the lower end surface of the sole, which significantly increases the fixing effect of the poured filler and the sole.

[0015] Preferably, the positioning column is provided with a fixed injection tube embedded in the installation cavity, the upper part of the fixed injection tube is fixedly inserted into the upper end surface of the positioning column, and the upper end of the fixed injection tube is inserted into the positioning blind hole, the adjustment mechanism includes a movable injection tube embedded in the installation cavity and axially slidably connected to the positioning column, a hinged rod with one end hinged to the cutter and the other end hinged to the outer wall of the movable injection tube, and an injection tube driving assembly for driving the movable injection tube to slide, the movable injection tube is slidably sleeved on the fixed injection tube, and the upper end pipe mouth of the fixed injection tube is the second injection hole.

[0016] By adopting the above technical scheme, the cooperation between the fixed injection tube and the movable injection tube can ensure that the molding material is smoothly injected into the positioning hole. When the movable injection tube undergoes axial sliding under the action of the injection tube driving assembly, the position of the cutter is adjusted by utilizing the articulated rod transmission principle, and the state of the cutter being extended or retracted can be accurately controlled.

[0017] Preferably, the lower outer wall of the positioning column is axially provided with a sliding groove which is connected to the installation cavity and is located below the lower mold base. The injection pipe driving assembly includes a first slide plate fixedly connected to the outer wall of the movable injection pipe and slidably passed through the sliding groove, and an injection pipe cylinder whose cylinder body is fixedly connected to the lifting plate, and the piston rod of the injection pipe cylinder is fixedly connected to the first slide plate.

[0018] By adopting the above technical solution, the piston rod of the injection tube cylinder drives the first slide plate to slide along the sliding groove, thereby driving the movable injection tube to move axially relative to the positioning column, thereby achieving precise control of the sliding position of the cutter, ensuring that the cutter can be extended or retracted at the appropriate time, thereby effectively adjusting the interaction between the cutter and the sole molding material.

[0019] Preferably, a sliding groove connected to the mounting cavity and located below the lower mold base is axially opened on the lower outer wall of the positioning column, and the injection tube driving assembly includes a second slide plate fixedly connected to the outer wall of the movable injection tube and slidably penetrated into the sliding groove, a trigger rod fixedly connected to the lower end surface of the lower mold base and located directly above the second slide plate, and a spring built into the mounting cavity and fixedly connected between the positioning column and the movable injection tube. When the positioning column moves up into position, the trigger rod abuts against the second slide plate to drive the movable injection tube to move downward relative to the positioning column, and pushes the cutter to slide and protrude out of the outer peripheral wall of the positioning column through the hinge rod. At this time, the spring undergoes elastic deformation and has elastic potential energy.

[0020] By adopting the above technical solution, when the positioning column moves up into position, the trigger rod abuts against the second slide plate to drive the movable injection tube to move downward relative to the positioning column, and the cutting knife is pushed to slide and protrude out of the outer wall of the positioning column with the help of the hinge rod. The spring undergoes elastic deformation in this process to store elastic potential energy. After the sole is formed and solidified, the lifting plate moves downward to drive the positioning column to descend, and the spring releases the elastic potential energy to push the movable injection tube to move upward relative to the positioning column, and the cutting knife is pulled by the hinge rod to be stored in the knife groove, so that the positioning column can be easily removed from the lower end surface of the sole.

[0021] Preferably, the positioning column is rotatably connected to the lifting plate around its own axis, and the lifting plate or the lower mold base is provided with a rotating component for driving the positioning column to rotate.

[0022] By adopting the above technical solution, after the sole is formed and solidified, during the downward movement of the positioning column, the rotating assembly drives the positioning column to rotate around its own axis, thereby driving the cutter to rotate, so that the scratches made by the cutter are spiral-shaped, increasing the contact area between the poured filler and the sole, thereby improving the adhesion effect of the poured filler on the sole.

[0023] In order to improve the molding quality of the sole, the second purpose of the present application is to provide a molding method for an integral sole molding mold with a built-in metal support plate.

[0024] A molding method of a sole integral molding mold with a built-in metal support plate comprises the following steps: Step S1, cleaning the prepared support plate, moving the lifting plate upward so that the positioning column slides through the bottom wall of the lower mold base and extends into the molding cavity, and applying a mold release agent to the inner walls of the lower mold base and the upper mold base; Step S2, aligning 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; Step S3, closing the upper mold base; Step S4, injecting molding material 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 column to move downward, so that the positioning column slides off the bottom surface of the sole, and during the downward movement of the positioning column, the molding 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 manufactured sole can be fully wrapped on the support plate; Step S5: demoulding.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. Initially, the lifting plate moves up so that the positioning column slides through the bottom wall of the lower mold base and extends into the molding cavity. The staff 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 mold base is closed, the support plate can be suspended in the molding cavity, and then the molding material is injected into the molding cavity through the first injection hole. After the sole is formed and solidified, the lifting plate moves down to drive the positioning column to move down, so that the positioning column slides off the bottom surface of the sole. During the downward movement of the positioning column, the molding 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 prepared sole can be fully wrapped in the support plate, thereby realizing the one-piece molding of the sole and improving the molding quality of the sole; 2. After the sole is formed and solidified, the cutter scratches the inner wall of the positioning hole during the downward movement of the positioning column, thereby increasing the roughness of the inner wall of the positioning hole and increasing the contact area between the injection filler and the sole, thereby improving the adhesion effect of the injection filler on the sole; 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 wall of the positioning hole. On the one hand, the smoothness of the cutter's sliding is improved and the resistance of the cutter is reduced. On the other hand, the cut is deepened and widened, further improving the roughness of the inner wall of the positioning hole and the adhesion effect of the injection filler, thereby improving the overall molding quality and stability of the sole. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of a sole one-piece molding mold with a built-in metal support plate in Example 1.

[0027] Figure 2 It is a schematic diagram of the internal structure of the lower die base and the upper die base in Example 1.

[0028] Figure 3 yes Figure 2 A local enlarged schematic diagram at point A.

[0029] Figure 4 It is a schematic diagram of the structure of the heating element in Example 2.

[0030] Figure 5 It is a structural schematic diagram of the injection tube drive assembly in Example 3.

[0031] Figure 6 It is a schematic diagram of the structure of the rotating assembly in Example 4.

[0032] Explanation of the reference numerals: 1. lower die seat; 11. mounting frame; 12. lifting plate; 13. rodless cylinder; 14. perforation; 15. turntable; 2. upper die seat; 21. bracket; 22. limit rod; 23. rotating rod; 3. support plate; 31. positioning blind hole; 4. positioning column; 41. fixed injection pipe; 42. cutting knife; 43. knife groove; 44. sliding groove; 45. first mounting ring; 5. adjustment mechanism; 51. movable injection pipe; 511. second mounting ring; 52. hinged rod; 53. injection pipe drive assembly; 531. first slide plate; 532. injection pipe cylinder; 533. second slide plate; 534. trigger rod; 535. spring; 6. heating element; 61. heating wire; 62. heat conductive ring; 63. heat conductive wire; 7. rotating assembly; 71. guide sleeve; 72. guide rod; 73. linear guide groove; 74. spiral guide groove. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-6 This application is described in further detail.

[0034] Embodiment 1: The present application embodiment discloses a shoe sole integral molding die with a built-in metal support plate, referring to Figure 1 , Figure 2 , including a lower mold base 1 and an upper mold base 2 covering the lower mold base 1, the lower mold base 1 and the upper mold base 2 are locked by bolts, a molding cavity is formed between the inner cavities of the lower mold base 1 and the upper mold base 2, and the lower mold base 1 / upper mold base 2 has a first injection hole (not shown in the figure).

[0035] The lower end surface of the lower die base 1 is fixedly connected with a mounting frame 11, and the mounting frame 11 is vertically slidably connected with a lifting plate 12 located below the lower die base 1, and a plurality of lifting plates 12 are provided. The mounting frame 11 is provided with a lifting drive member for driving the lifting plate 12 to slide. In this embodiment, the lifting drive member is a rodless cylinder 13, and 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 column 4 that is slidably penetrated through the bottom wall of the lower die base 1. In this embodiment, the lower end of the positioning column 4 is fixedly connected to the upper end surface of the lifting plate 12, and the bottom wall of the lower die base 1 is penetrated with a through hole 14 for the positioning column 4 to pass through.

[0036] Reference 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.

[0037] 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.

[0038] 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.

[0039] 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: 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.

[0040] Step S2 , aligning the positioning blind hole 31 of the support plate 3 with the fixed injection tube 41 so that the upper end of the fixed injection tube 41 is inserted into the positioning blind hole 31 , thereby supporting the support plate 3 .

[0041] Step S3, close the upper die base 2, lock the lower die base 1 and the upper die base 2 by bolts, and rotate the rotary rod 23 to drive the limit rod 22 to rotate. The limit rod 22 moves downward due to the restriction of the thread, so that the lower end of the limit rod 22 abuts against the upper end surface of the support plate 3.

[0042] Step S4, inject 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 to drive the positioning column 4 to descend. During the downward movement of the positioning column 4, the cutter 42 scratches the inner wall of the positioning hole formed by the positioning column 4, thereby increasing the roughness of the inner wall of the positioning hole, and injects molding filler into the positioning hole formed by the positioning column 4 through the second injection hole to seal the positioning hole. When the positioning column 4 is about to fall out of the sole, the piston rod of the injection tube cylinder 532 contracts and drives the movable injection tube 51 to move downward relative to the positioning column 4, and pulls the cutter 42 through the hinged rod 52 to be stored in the knife groove 43, 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 shrink into the perforation 14.

[0043] Step S5: demoulding.

[0044] Embodiment 2: The difference from Example 1 is that, referring to Figure 4 The positioning column 4 is provided with a heating element 6 for heating the cutter 42. In this embodiment, the heating element 6 includes a heating wire 61 built into the installation cavity and spirally wound around the outer peripheral wall of the movable injection tube 51, a heat-conducting ring 62 fixedly sleeved on the movable injection tube 51, and a heat-conducting wire 63 connected between the heat-conducting ring 62 and the cutter 42 to heat the cutter 42. The heating wire 61 heats the cutter 42 through the heat-conducting ring 62 and the heat-conducting wire 63. In this embodiment, the molding material is low-density polyethylene, and the molding filler is a low-melting-point polyolefin elastomer.

[0045] Embodiment 3: The difference from Example 1 or Example 2 is that, referring to Figure 5In this embodiment, the inner wall of the positioning column 4 is fixedly connected to a first mounting ring 45, the outer wall of the movable injection tube 51 is fixedly connected to a second mounting ring 511, and the injection tube driving assembly 53 includes 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 mold base 1 and located directly above the second slide plate 533, and a spring 535 built into the mounting cavity and fixedly connected between the positioning column 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 column 4 so that the cutter 42 retracts into the knife groove 43. When the positioning column 4 moves upward 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. After the sole is formed and solidified, the lifting plate 12 moves downward to drive the positioning column 4 down, and the spring 535 releases the elastic potential energy to push the movable injection tube 51 to move upward relative to the positioning column 4, and pulls the cutter 42 to be stored in the knife groove 43 through the hinge rod 52, so that the upper end of the positioning column 4 can be retracted into the perforation 14.

[0046] Embodiment 4: The difference from Example 1 or Example 2 is that, referring to Figure 6 In this embodiment, the upper end surface of the lifting plate 12 is rotatably connected with a turntable 15, the positioning column 4 is coaxially fixed to the turntable 15, and the movable injection tube 51 is inserted through the turntable 15 and the lifting plate 12. The lifting plate 12 or the lower die base 1 is provided with a rotating assembly 7 for driving the positioning column 4 to rotate. In this embodiment, the rotating assembly 7 includes a guide sleeve 71 fixedly connected to the lower end surface of the lower die base 1 and located above the first slide plate 531, and a guide rod 72 fixedly connected to the outer wall of the positioning column 4 and located above the first slide plate 531. The positioning column 4 is coaxially slidably inserted through the guide sleeve 71, and the lower end outer wall of the guide sleeve 71 is provided with a linear guide groove 73 along the axial direction, and the upper end of the linear guide groove 73 is provided with a spiral guide groove 74 that is spirally arranged around the outer peripheral wall of the guide sleeve 71, and the guide rod 72 is slidably inserted through the linear guide groove 73 and the spiral guide groove 74. In other embodiments, the rotating assembly 7 can use a motor and a gear set to drive the turntable 15 to rotate.

[0047] After the positioning column 4 moves up to its position, the guide rod 72 is located at the uppermost end of the spiral guide groove 74. After the sole is formed and solidified, during the downward movement of the positioning column 4 relative to the guide sleeve 71, the guide rod 72 is restricted by the spiral guide groove 74 to realize the rotation of the positioning column 4 relative to the guide sleeve 71 around its own axis, thereby driving the cutter 42 to rotate, so that the scratches scraped by the cutter 42 are spiral-shaped, increasing the contact area between the injection filler and the sole, thereby improving the adhesion effect of the injection filler on the sole.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in 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) / upper die base (2) has 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), a positioning blind hole (31) is provided on the lower end surface of the support plate (3), the upper end of the positioning column (4) is inserted into the positioning blind hole (31), and a second injection hole is provided on the upper end surface of the positioning column (4) along the axial direction.

2. The one-piece sole forming mold with a built-in metal support plate according to claim 1, characterized in that: A cutting knife (42) is protruding from the outer wall of the positioning column (4).

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

4. The one-piece sole forming mold with a built-in metal support plate according to claim 2, characterized in that: The cutters (42) are provided in plurality and distributed around the axis of the positioning column (4).

5. The one-piece sole forming mold with a built-in metal support plate according to claim 2, characterized in that: The positioning column (4) has a mounting cavity, the outer peripheral wall of the positioning column (4) is radially provided with a knife groove (43) connected to the mounting cavity, the cutting knife (42) is radially slidingly connected to the knife groove (43), and the positioning column (4) is provided with an adjustment mechanism (5) for adjusting the sliding position of the cutting knife (42).

6. The one-piece sole forming mold with a built-in metal support plate according to claim 5, 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.

7. The one-piece sole forming mold with a built-in metal support plate according to claim 6, 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).

8. The one-piece sole forming mold with a built-in metal support plate according to claim 6, 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.

9. The one-piece sole forming mold with a built-in metal support plate according to claim 5, 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.

10. A method for forming a sole integrally formed mold with a built-in metal support plate according to any one of claims 1 to 9, 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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