Sole mold

Abstract

The utility model relates to the field of mold design, and provides a shoe sole mold which comprises an upper mold, a middle mold, a lower mold and a heat insulation mold, a mold cavity for shoe sole forming is formed in the side face, close to the upper mold, of the lower mold, a plurality of first negative pressure holes are formed in the side face, away from the upper mold, of the lower mold, and the first negative pressure holes communicate with the inner walls of the mold cavity correspondingly; the heat insulation die comprises an aluminum die frame covering the lower die and heat insulation layers arranged on the inner side walls of the aluminum die frame, and the heat insulation layers abut against the outer side wall of the lower die; a vacuum gap used for heat insulation and heat preservation is formed between the inner bottom wall of the aluminum mold frame and the lower mold, a vacuum opening communicated with the vacuum gap is formed in the outer wall of the aluminum mold frame, and the vacuum opening is used for being matched with a first vacuumizing device of a machine table base to form negative pressure. On the basis, the heat loss condition of the lower mold can be improved when the lower mold is vacuumized, so that the internal temperature of the lower mold and the heat supply set temperature are kept within a small difference range, and the forming quality of the shoe sole is ensured.

Description

Technical Field

[0001] The present application relates to the field of mold design, and in particular to a sole mold. Background Art

[0002] The sole mold is an important tool for manufacturing soles in industrial production. It can obtain the required sole products through injection molding, blow molding, extrusion, foaming and other methods.

[0003] The Chinese patent application publication number CN117584513A discloses a method for making a sole and a sole made therefrom. The sole comprises a sole body and a film coated on the outer surface of the sole body, and the two are tightly bonded. In a specific processing process, the film is laid on the surface of a lower mold, preheated, and then the thin plate is tightly adsorbed on the inner wall of the mold cavity of the lower mold by negative pressure adsorption. Secondly, foaming particles or foamed embryos are filled into the mold cavity, the mold cavity is closed, and then the air between the foaming material and the film is extracted by the negative pressure of the upper mold, and then the shoe mold is heated to make the film tightly bonded to the foaming material, thereby making the sole.

[0004] Regarding the above-mentioned related technical solutions, since the lower mold needs to be continuously evacuated to form a negative pressure during the production process of the sole, the heat of the lower mold will be continuously taken away during the vacuuming process, which will cause heat loss inside the lower mold when the lower mold is subsequently heated to make the foaming material and the film bonded to each other. The internal temperature of the lower mold will be lower than the set temperature of the heating. When the temperature is low, there will be bonding defects between the film and the foaming material, which will affect the molding quality of the sole. Utility Model Content

[0005] Based on this, the present application provides a sole mold that can improve the heat loss of the lower mold when the lower mold is vacuumed, so that the internal temperature of the lower mold and the heating set temperature are maintained within a small difference range to ensure the molding quality of the sole.

[0006] The present application provides a sole mold adopting the following technical solution:

[0007] A sole mold, comprising an upper mold, a middle mold, a lower mold and a heat-insulating mold arranged in sequence, wherein a mold cavity for molding the sole is provided on a side of the lower mold close to the upper mold, and a plurality of first negative pressure holes are provided on a side of the lower mold away from the upper mold, wherein each of the first negative pressure holes is respectively connected to each inner wall of the mold cavity;

[0008] The insulating mold includes an aluminum mold frame covering the lower mold and an insulating layer arranged on each inner wall of the aluminum mold frame, and the insulating layer is against the outer wall of the lower mold; a vacuum gap for thermal insulation is formed between the inner bottom wall of the aluminum mold frame and the lower mold, and a vacuum port connected to the vacuum gap is provided on the outer wall of the aluminum mold frame, and the vacuum port is used to cooperate with the first vacuum pumping device of the machine base to form negative pressure.

[0009] By adopting the above-mentioned technical scheme, when the sole mold of the present application is in use, a first vacuum pumping device is used to draw a vacuum inside the vacuum port to form a negative pressure, and the air inside the lower mold cavity can enter the vacuum gap through the first negative pressure hole and be extracted from the vacuum port, thereby adsorbing the film on the inner wall of the mold cavity; by making the thermal insulation layer abut against the outer wall of the lower mold, the heat exchange between the lower mold and the outside air can be weakened when the lower mold is heated, thereby achieving a heat preservation effect; at the same time, the setting of the thermal insulation layer enables a closed vacuum gap to be formed between the aluminum mold frame and the lower mold, and the air inside the mold cavity will move a certain distance in the vacuum gap after being extracted from the first negative pressure hole and then leave from the vacuum port. The extension of the air movement distance can reduce the heat loss, thereby achieving a heat insulation effect, so that the internal temperature of the lower mold and the heating set temperature are maintained within a small difference range to ensure the molding quality of the sole.

[0010] Optionally, a punch is fixed on the side of the upper mold close to the lower mold, and in the mold closing state, the punch is located inside the mold cavity; an inner concave chamber is provided on the side of the upper mold away from the lower mold, and the inner concave chamber is used to cooperate with the second vacuum device of the machine top seat to form negative pressure, and the punch and the upper mold are jointly provided with a plurality of second negative pressure holes, and each second negative pressure hole is respectively connected to the inner concave chamber.

[0011] By adopting the above-mentioned technical scheme, when the sole mold of the present application is in use, after the film is adsorbed on the inner wall of the mold cavity and the foaming material is filled in the mold cavity, the upper mold and the lower mold are closed, and the second vacuum device is used to evacuate the interior of the inner concave cavity to form a negative pressure. The air between the foaming material and the film can enter the inner concave cavity through the second negative pressure hole and be extracted by the second vacuum device, so that the film is closely attached to the foaming material, which is beneficial to the subsequent heating of the mold to enable the film and the foaming material to be closely bonded.

[0012] Optionally, a first sealing ring is embedded in the side of the lower mold close to the upper mold, and a second sealing ring is embedded in the side of the middle mold close to the upper mold. In the mold closing state, the first sealing ring and the second sealing ring are both located on the outer peripheral side of the punch.

[0013] By adopting the above-mentioned technical scheme, when the film is laid on the cavity surface of the lower mold, it will be located on the outside of the first sealing ring. After the middle mold presses the film, the setting of the first sealing ring can improve the sealing effect between the lower mold and the middle mold. After the upper mold is covered on the middle mold, the setting of the second sealing ring can improve the sealing effect between the middle mold and the upper mold, and then after the mold is closed, the mold cavity can form a closed space, which is conducive to the smooth bonding of the film and the foaming material, thereby ensuring the molding quality of the sole.

[0014] Optionally, the lower mold is provided with extensions on all sides, and the side of the extension away from the upper mold is provided with a tenon block; the side of the aluminum mold frame close to the upper mold is provided with an inner tenon groove, and when the lower mold is fixed to the aluminum mold frame, the extension is against the aluminum mold frame, and the tenon block is matched and inserted into the inner tenon groove.

[0015] By adopting the above-mentioned technical solution, when the lower mold is fixed to the aluminum mold frame, the extended part of the lower mold abuts against the aluminum mold frame, and the tenon block can be matched and inserted into the inner tenon groove, which can play a role in positioning the lower mold, and is also beneficial to maintain a good sealing effect between the lower mold and the aluminum mold frame.

[0016] Optionally, the insulation mold also includes a baffle arranged on the inner side of the insulation layer, and the baffle is fixed to the inner bottom wall of the aluminum mold frame; a first bevel is provided on the top of the baffle, and a second bevel is provided on the edge of the lower mold away from the upper mold. When the lower mold is installed on the insulation mold, the first bevel and the second bevel are pressed against each other to limit the position.

[0017] By adopting the above-mentioned technical solution, since the thermal insulation layer may be made of flexible material, by setting a stopper on the bottom wall of the aluminum mold frame and utilizing the cooperation between the first bevel of the stopper and the second bevel of the lower mold, the position of the lower mold can be quickly located, so that the lower mold has good positioning accuracy after being installed on the thermal insulation mold, which is beneficial to the accurate mold closing of the upper mold and the lower mold.

[0018] Optionally, a rotatable threaded sleeve is embedded in the side of the lower mold away from the upper mold, and the threaded sleeve is threadedly connected with an adjusting bolt; an insertion hole is provided on the side of the aluminum mold frame away from the lower mold, and the insertion hole includes a connected through area and a countersunk area. When the adjusting bolt is passed through the through area and the aluminum mold frame is fixed to the machine base, the end of the adjusting bolt is matched and located inside the countersunk area.

[0019] By adopting the above-mentioned technical scheme, by rotating the adjusting bolt to adjust the connection position of the adjusting bolt and the threaded sleeve, the first bevel angle and the second bevel angle can be kept in contact or form a certain distance, and then after the aluminum mold frame is fixed to the machine base, the end of the adjusting bolt is matched and located inside the countersunk area, and the position of the lower mold can be determined by the connection position of the adjusting bolt and the threaded sleeve, that is, rotating the adjusting bolt can adjust the position of the lower mold, which can ensure the accurate mold fitting of the upper mold and the lower mold during the foaming molding process of different types of soles, thereby improving the adaptability and practicality of the sole mold.

[0020] Optionally, the machine base is provided with an adjustment hole, and when the aluminum mold frame is fixed to the machine base, the adjustment hole is arranged opposite to the end of the adjustment bolt.

[0021] By adopting the above-mentioned technical solution, when the aluminum mold frame is fixed to the machine base, the end of the adjusting bolt can be aligned with the adjusting hole, and the adjusting bolt can be conveniently rotated through the adjusting hole to adjust the position of the lower mold without re-disassembling the aluminum mold frame, which is conducive to improving the convenience of the adjustment operation.

[0022] Optionally, a mold passage for steam heating or water cooling is provided inside the upper mold, and the mold passage is extended in a serpentine shape.

[0023] By adopting the above technical solution, when performing foaming molding of the sole, the mold cavity can be heated by passing steam into the mold passage, so that the film and the foaming material are tightly bonded; after the sole is successfully formed, the heat of the mold cavity can be quickly taken away by passing cold water into the mold passage, achieving a rapid cooling effect. In addition, by extending the mold passage in a serpentine shape, the overall path length of the mold passage can be extended to enhance the heating and cooling effects on the upper mold.

[0024] Optionally, the side of the upper mold is provided with two spaced-apart transverse flow channels and a plurality of side-by-side longitudinal flow channels, and each longitudinal flow channel is connected to the two transverse flow channels; each longitudinal flow channel and each transverse flow channel are installed with a blocking piece at the corresponding position to form a serpentine-extending mold passage.

[0025] By adopting the above technical solution, by opening two transverse flow channels and multiple longitudinal flow channels, and installing plugging parts at the corresponding positions of each transverse flow channel and each longitudinal flow channel, a mold passage with a unidirectional flow path and a serpentine extension can be easily processed.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. By setting a heat insulation layer against the outer wall of the lower mold, the heat exchange between the lower mold and the outside can be weakened when the lower mold is heated, thus achieving a heat preservation effect;

[0028] 2. By forming a closed vacuum gap between the aluminum mold frame and the lower mold, the air moves longer in the vacuum gap, which can reduce heat loss and play a role in heat insulation, so that the internal temperature of the lower mold and the heating set temperature are kept within a small difference range to ensure the molding quality of the sole;

[0029] 3. By setting up a mold passage, steam can be introduced into the mold passage to heat the upper mold, so that the film and the foaming material are tightly bonded; after the sole is successfully formed, cold water can be introduced into the mold passage to quickly take away the heat of the upper mold, thereby achieving a rapid cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is an exploded view of the upper mold, the middle mold, the lower mold and the heat insulation mold in Example 1;

[0031] Figure 2 is a schematic diagram of the overall structure of the sole mold in Example 1;

[0032] Figure 3 yes Figure 1 The cross-sectional view along the AA axis mainly reflects the structure of the mold passage;

[0033] Figure 4 is a schematic diagram of the overall structure of the sole mold in Example 2;

[0034] Figure 5 yes Figure 4 Enlarged view of point B in the middle.

[0035] Description of reference numerals: 1, upper die; 11, punch; 12, second negative pressure hole; 13, inner concave chamber; 2, middle die; 21, through groove; 22, second sealing ring; 3, lower die; 31, die cavity; 32, first negative pressure hole; 33, first sealing ring; 34, extension; 341, tenon block; 35, second bevel; 36, embedded groove; 37, threaded sleeve;

[0036] 4. Insulation mold; 41. Aluminum mold frame; 411. Vacuum port; 412. Internal mortise and tenon groove; 42. Insulation layer; 43. Stopper; 431. First bevel angle; 44. Insertion hole; 441. Through area; 442. Countersunk area; 45. Adjustment bolt;

[0037] 5. Vacuum gap; 6. Machine base; 61. First vacuum hole; 62. Adjustment hole; 7. Machine top seat; 71. Second vacuum hole; 8. Mold passage; 81. Horizontal flow channel; 82. Longitudinal flow channel; 83. Sealing part; 831. First sealing part; 832. Second sealing part. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-5 This application is described in further detail.

[0039] Embodiment 1:

[0040] The embodiment of the present application discloses a sole mold.

[0041] Reference Figure 1 A shoe sole mold comprises an upper mold 1, a middle mold 2, a lower mold 3 and a heat-insulating mold 4 arranged in sequence; wherein a convex mold 11 is fixed on the side of the upper mold 1 close to the lower mold 3, and a through groove 21 is provided in the middle mold 2 for the convex mold 11 to pass through; a mold cavity 31 is provided on the side of the lower mold 3 close to the upper mold 1, and the mold cavity 31 is adapted to the shape of the convex mold 11. Also refer to Figure 2 When the upper mold 1, the middle mold 2 and the lower mold 3 are molded together, the punch 11 can pass through the through groove 21 and enter the mold cavity 31, so that a closed space can be formed inside the mold cavity 31 for the sole to be foamed and molded.

[0042] Reference Figure 2, a plurality of first negative pressure holes 32 are provided on the side of the lower mold 3 away from the upper mold 1, and each of the first negative pressure holes 32 is respectively connected to each inner wall of the mold cavity 31, so as to form a negative pressure inside the mold cavity 31. The heat-insulating mold 4 includes an aluminum mold frame 41 and a heat-insulating layer 42, wherein the aluminum mold frame 41 is made of aluminum alloy material, the aluminum mold frame 41 is fixed to the side of the lower mold 3 away from the upper mold 1, and the aluminum mold frame 41 is spaced apart from the lower mold 3 and a vacuum gap 5 is formed. The heat-insulating layer 42 is made of a material with a low thermal conductivity coefficient, and the heat-insulating layer 42 is bonded and fixed to each inner side wall of the aluminum mold frame 41; when the aluminum mold frame 41 is fixed to the lower mold 3, the heat-insulating layer 42 can be attached to the outer side wall of the lower mold 3, so as to reduce the heat exchange between the lower mold 3 and the outside air, play a role of heat preservation, and at the same time, the vacuum gap 5 can be closed.

[0043] The lower mold 3 is provided with extensions 34 on all sides, each of which is formed integrally with the lower mold 3, and each of which is located on the side of the lower mold 3 close to the upper mold 1; the side of the extension 34 away from the upper mold 1 is provided with an integrally formed tenon block 341, and the number of the tenon blocks 341 is provided in plurality and is arranged at intervals along the extension direction of the extension 34. The side of the aluminum mold frame 41 close to the upper mold 1 is provided with inner tenon grooves 412, and the number of the inner tenon grooves 412 is equal to the number of the tenon blocks 341. After the lower mold 3 is fixed to the aluminum mold frame 41, the extension 34 can abut against the aluminum mold frame 41 to improve the sealing effect between the lower mold 3 and the aluminum mold frame 41, and at the same time, each tenon block 341 can be correspondingly inserted into each inner tenon groove 412, thereby achieving the effect of accurately positioning the lower mold 3.

[0044] A vacuum port 411 is provided on the side of the aluminum mold frame 41 away from the lower mold 3, and the vacuum hole passes through the inner side of the aluminum mold frame 41 and is connected to the vacuum gap 5; when the lower mold 3 of the sole mold is in use, the aluminum mold frame 41 will be installed on the machine base 6 of the molding equipment, and the machine base 6 is provided with a first vacuum hole 61, and the first vacuum hole 61 can be arranged opposite to the vacuum port 411; the molding equipment is equipped with a first vacuum pumping device for connecting to the first vacuum hole 61, and by controlling the operation of the first vacuum pumping device, the air inside the mold cavity 31 can be extracted in sequence through the first negative pressure hole 32, the vacuum gap 5, the vacuum port 411 and the first vacuum hole 61, thereby forming a negative pressure inside the mold cavity 31.

[0045] When performing the foaming molding of the sole, a film is laid on the surface of the mold cavity 31 of the lower mold 3, and the middle mold 2 is used to press the film against the lower mold 3. Preheating the film can make the film in an extended state; then the first vacuum device is controlled to operate, and the first vacuum device extracts the air inside the mold cavity 31, so that the first negative pressure hole 32 can form a negative pressure and the film can be adsorbed on the inner wall of the mold cavity 31.

[0046] Back to Figure 1A first sealing ring 33 is embedded in the side of the lower mold 3 close to the upper mold 1. The first sealing ring 33 is wrapped around the outer peripheral side of the mold cavity 31, and when the middle mold 2 and the lower mold 3 are closed, the middle mold 2 can be pressed against the first sealing ring 33 and put it in a compressed state, thereby improving the sealing effect between the middle mold 2 and the lower mold 3; it should be noted here that when the film is laid on the surface of the mold cavity 31 of the lower mold 3, the film needs to be located on the inner side of the first sealing ring 33.

[0047] The side of the upper mold 1 away from the lower mold 3 is provided with an inner concave chamber 13, and the male mold 11 and the upper mold 1 are provided with a second negative pressure hole 12. The number of the second negative pressure holes 12 is provided in plurality, and each second negative pressure hole 12 is connected to the inner concave chamber 13. Figure 2 When the upper mold 1 of the sole mold is in use, the aluminum mold frame 41 will be installed on the machine top seat 7 of the molding equipment. The machine top seat 7 is provided with a second vacuum hole 71, and the second vacuum hole 71 can be connected with the inner concave chamber 13; the molding equipment is installed with a second vacuum device connected to the second vacuum hole 71. By controlling the operation of the second vacuum device, the air inside the mold cavity 31 can be extracted in sequence through the second negative pressure hole 12, the inner concave chamber 13 and the second vacuum hole 71.

[0048] When the sole is foamed, the film is adsorbed on the inner wall of the mold cavity 31 by the negative pressure of the first negative pressure hole 32, and then the foaming material is filled in the mold cavity 31 and pressed against the film, so that the upper mold 1 and the lower mold 3 are closed, and the second vacuum device is controlled to operate to extract the air between the foaming material and the film, which is beneficial to the close bonding between the foaming material and the film and improves the molding quality of the sole.

[0049] It should be noted here that the foaming material used in this embodiment can be foaming particles, or a foaming embryo formed by the initial foaming. When a foaming embryo is used, micropores will be formed in the foaming embryo during the initial foaming to facilitate the discharge of air. At the same time, each second negative pressure hole 12 needs to be arranged around the outer peripheral edge of the punch 11 to ensure that the air between the foaming embryo and the film can be smoothly extracted through the gap between the foaming embryo and the film to ensure the molding quality.

[0050] In addition, a second sealing ring 22 is embedded on the side of the middle mold 2 close to the upper mold 1, and the second sealing ring 22 is located on the outer peripheral side of the through groove 21; when the upper mold 1, the middle mold 2 and the lower mold 3 are closed, the punch 11 passes through the through groove 21, and the upper mold 1 can be pressed against the second sealing ring 22 and put it in a compressed state, thereby improving the sealing effect between the upper mold 1 and the middle mold 2, and ensuring that the mold cavity 31 has a good sealing effect after closing the mold.

[0051] A mold passage 8 for steam heating or water cooling is provided inside the upper mold 1 and the lower mold 3. The setting method and setting idea of ​​the mold passage 8 of the upper mold 1 are basically the same as those of the mold passage 8 of the lower mold 3. In this embodiment, the mold passage 8 of the upper mold 1 is used as an example for explanation.

[0052] Specific reference Figure 3 , a transverse flow channel 81 and a longitudinal flow channel 82 are provided on the side of the upper mold 1, wherein there are two transverse flow channels 81, and the two transverse flow channels 81 are arranged at intervals; the two ends of the transverse flow channel 81 respectively penetrate the two side surfaces of the upper mold 1, and a first blocking member 831 is installed at the end of each transverse flow channel 81. There are multiple longitudinal flow channels 82, each longitudinal flow channel 82 is vertically connected to the two transverse flow channels 81, and all longitudinal flow channels 82 are arranged side by side; all transverse flow channels 81 and all longitudinal flow channels 82 are combined to form a mold passage 8.

[0053] One end of the longitudinal flow channel 82 passes through the side of the upper mold 1, and the other end ends at the connection with the transverse flow channel 81, and the opening end of each longitudinal flow channel 82 located in the middle is also installed with a first blocking piece 831. At this time, the opening end of one of the longitudinal flow channels 82 located on the outermost side can be used as an inlet end, and the opening end of another longitudinal flow channel 82 located on the outermost side can be used as an outlet end.

[0054] It can be understood that the transverse flow channel 81 is divided into multiple local sections by multiple longitudinal flow channels 82, and the second blocking members 832 are alternately arranged between the local sections of the two transverse flow channels 81. The second blocking members 832 can block the local sections at the positions, thereby forming a serpentine-shaped extended mold passage 8. It should be noted that the first blocking member 831 and the second blocking member 832 are both used to form a mold passage 8 with a specific flow direction, and are collectively referred to as blocking members 83.

[0055] When the sole is foamed, after the foaming material is filled in the mold cavity 31 and pressed against the film, the mold cavity 31 can be heated by passing steam into the mold passage 8 of the upper mold 1 and the mold passage 8 of the lower mold 3, so that the film and the foaming material are tightly bonded; after the sole is successfully formed, the heat of the mold cavity 31 can be quickly taken away by passing cold water into the mold passage 8, thereby achieving a rapid cooling effect.

[0056] The implementation principle of Example 1 of the present application is:

[0057] When the sole mold of the present application is in use, a first vacuum pumping device is used to draw a vacuum inside the vacuum port 411 to form a negative pressure. The air inside the mold cavity 31 of the lower mold 3 can enter the vacuum gap 5 through the first negative pressure hole 32 and be extracted from the vacuum port 411, thereby adsorbing the film on the inner wall of the mold cavity 31; the provision of the heat insulation layer 42 can weaken the heat exchange between the lower mold 3 and the outside air when the lower mold 3 is heated and heated, thereby achieving a heat preservation effect; at the same time, the provision of the heat insulation layer 42 enables a closed vacuum gap 5 to be formed between the aluminum mold frame 41 and the lower mold 3. After the air inside the mold cavity 31 is extracted from the first negative pressure hole 32, it will move a certain distance in the vacuum gap 5 and then leave from the vacuum port 411. The extension of the air movement distance can reduce the heat loss, thereby achieving a heat insulation effect, so that the internal temperature of the lower mold 3 and the heating set temperature are maintained within a small difference range to ensure the molding quality of the sole.

[0058] Embodiment 2:

[0059] The embodiment of the present application discloses a sole mold.

[0060] Reference Figure 4 , Figure 5 A sole mold disclosed in an embodiment of the present application, the remaining components are the same as those in Example 1, and are not described one by one here; the difference from Example 1 is that the insulation mold 4 in this embodiment also includes a baffle 43, the baffle 43 is fixed to the inner bottom wall of the aluminum mold frame 41, and the baffle 43 is located on the inner circumference of the insulation layer 42; the top of the baffle 43 is provided with a first bevel 431, and the first bevel 431 is inclined inwardly.

[0061] A second bevel 35 is provided on the edge of the lower mold 3 away from the upper mold 1. The second bevel 35 is inclined outward, and when the lower mold 3 is installed on the insulation mold 4, the first bevel 431 and the second bevel 35 can abut against each other to limit the position, thereby playing a role in quickly positioning the position of the lower mold 3. After the lower mold 3 is installed on the insulation mold 4, it can have good positioning accuracy, which is beneficial to the accurate mold closing of the upper mold 1 and the lower mold 3.

[0062] An embedded groove 36 is provided on the side of the lower mold 3 away from the upper mold 1, and a threaded sleeve 37 is rotatably embedded inside the embedded groove 36. The threaded sleeve 37 can be partially exposed on the side of the lower mold 3 away from the upper mold 1; an insertion hole 44 is provided on the side of the aluminum mold frame 41 away from the lower mold 3, and an adjusting bolt 45 is arranged inside the insertion hole 44. The adjusting bolt 45 can pass through the vacuum gap 5 and be threadedly connected with the threaded sleeve 37.

[0063] Specifically, the insertion hole 44 includes a connected through area 441 and a countersunk area 442, the countersunk area 442 is located on the side of the aluminum mold frame 41 away from the lower mold 3, the outer diameter of the adjusting bolt 45 is equal to the inner diameter of the through area 441, so that the adjusting bolt 45 can match and pass through the through area 441; the end of the adjusting bolt 45 away from the threaded sleeve 37 has an integrally formed end head, and the end head is located in the countersunk area 442, and when the aluminum mold frame 41 is fixed to the machine base 6, the side of the machine base 6 can abut against the adjusting bolt 45 and force the end head to abut against the inner wall of the countersunk area 442, thereby limiting the axial movement of the adjusting bolt 45, so that the position of the lower mold 3 can be kept fixed.

[0064] In addition, the machine base 6 is also provided with an adjustment hole 62, the inner diameter of the adjustment hole 62 is smaller than the outer diameter of the end; when the aluminum mold frame 41 is fixed to the machine base 6, the end of the adjusting bolt 45 can be directly opposite the adjustment hole 62, and the adjusting bolt 45 can be conveniently rotated through the adjustment hole 62 to adjust the position of the lower mold 3, without the need to disassemble the aluminum mold frame 41, which is conducive to improving the convenience of the adjustment operation.

[0065] The implementation principle of Example 2 of the present application is:

[0066] When performing foam molding of different types of soles, it is first necessary to adjust the mold clearance between the upper mold 1, the middle mold 2 and the lower mold 3; by putting the upper mold 1, the middle mold 2 and the lower mold 3 in a mold closing state, passing the tool through the adjustment hole 62 and rotating the adjustment bolt 45, the lower mold 3 can be moved toward the upper mold 1, thereby playing a role in quickly adjusting the position of the lower mold 3, ensuring the accurate mold closing of the upper mold 1 and the lower mold 3 during the foam molding process of different types of soles, and improving the adaptability and practicality of the sole mold.

[0067] The above are 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 sole mold, characterized in that: The shoe sole molding method comprises an upper mold (1), a middle mold (2), a lower mold (3) and a heat-insulating mold (4) which are arranged in sequence, wherein a mold cavity (31) for molding a shoe sole is provided on a side of the lower mold (3) close to the upper mold (1), and a plurality of first negative pressure holes (32) are provided on a side of the lower mold (3) away from the upper mold (1), and each of the first negative pressure holes (32) is respectively connected to an inner wall of the mold cavity (31); The heat-insulating mold (4) comprises an aluminum mold frame (41) which is covered on the lower mold (3) and a heat-insulating layer (42) which is arranged on each inner side wall of the aluminum mold frame (41), wherein the heat-insulating layer (42) is in contact with the outer side wall of the lower mold (3); a vacuum gap (5) for heat insulation and heat preservation is formed between the inner bottom wall of the aluminum mold frame (41) and the lower mold (3); a vacuum port (411) which is connected to the vacuum gap (5) is provided on the outer wall of the aluminum mold frame (41), and the vacuum port (411) is used to cooperate with a first vacuum extraction device of a machine base (6) to form a negative pressure.

2. The sole mold according to claim 1, characterized in that: A punch (11) is fixed on the side of the upper mold (1) close to the lower mold (3); in the mold closing state, the punch (11) is located inside the mold cavity (31); an inner concave chamber (13) is provided on the side of the upper mold (1) away from the lower mold (3); the inner concave chamber (13) is used to cooperate with a second vacuum device of the machine top seat (7) to form a negative pressure; the punch (11) and the upper mold (1) are jointly provided with a plurality of second negative pressure holes (12); each of the second negative pressure holes (12) is respectively connected to the inner concave chamber (13).

3. The sole mold according to claim 2, characterized in that: A first sealing ring (33) is embedded in the side surface of the lower mold (3) close to the upper mold (1), and a second sealing ring (22) is embedded in the side surface of the middle mold (2) close to the upper mold (1). In the mold closing state, the first sealing ring (33) and the second sealing ring (22) are both located on the outer peripheral side of the punch (11).

4. The sole mold according to claim 1, characterized in that: The lower mold (3) is provided with extension parts (34) on all sides thereof, and a tenon block (341) is provided on the side of the extension part (34) away from the upper mold (1); an inner tenon groove (412) is provided on the side of the aluminum mold frame (41) close to the upper mold (1); when the lower mold (3) is fixed to the aluminum mold frame (41), the extension part (34) abuts against the aluminum mold frame (41), and the tenon block (341) is matched and inserted into the inner tenon groove (412).

5. The sole mold according to claim 1, characterized in that: The heat-insulating mold (4) further comprises a stopper (43) arranged on the inner peripheral side of the heat-insulating layer (42), and the stopper (43) is fixed to the inner bottom wall of the aluminum mold frame (41); a first bevel (431) is arranged on the top of the stopper (43), and a second bevel (35) is arranged on the edge of the lower mold (3) away from the upper mold (1); when the lower mold (3) is mounted on the heat-insulating mold (4), the first bevel (431) and the second bevel (35) abut against each other for limiting position.

6. The sole mold according to claim 5, characterized in that: A rotatable threaded sleeve (37) is embedded in the side of the lower mold (3) away from the upper mold (1), and an adjusting bolt (45) is threadedly connected to the threaded sleeve (37); an insertion hole (44) is provided on the side of the aluminum mold frame (41) away from the lower mold (3), and the insertion hole (44) includes a connected through area (441) and a countersunk area (442); when the adjusting bolt (45) is inserted into the through area (441) and the aluminum mold frame (41) is fixed to the machine base (6), the end of the adjusting bolt (45) is matched and located inside the countersunk area (442).

7. The sole mold according to claim 6, characterized in that: The machine base (6) is provided with an adjustment hole (62). When the aluminum mold frame (41) is fixed to the machine base (6), the adjustment hole (62) is arranged to face the end of the adjustment bolt (45).

8. The sole mold according to claim 1, characterized in that: A mold passage (8) for steam heating or water cooling is provided inside the upper mold (1), and the mold passage (8) is arranged to extend in a serpentine shape.

9. The sole mold according to claim 8, characterized in that: The side surface of the upper mold (1) is provided with two spaced-apart transverse flow channels (81) and a plurality of side-by-side longitudinal flow channels (82), each of the longitudinal flow channels (82) being connected to the two transverse flow channels (81); a blocking piece (83) is installed at a corresponding position of each longitudinal flow channel (82) and each transverse flow channel (81) to form a serpentine-shaped extending mold passage (8).

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