Sole mold capable of rapidly exchanging heat

Abstract

The utility model relates to the field of shoe mold design, and provides a rapid heat exchange shoe sole mold which comprises a lower mold body obtained through 3D printing, the lower mold body is provided with a mold cavity for shoe sole forming, and the inner wall of the mold cavity is provided with first negative pressure holes penetrating through the side face of the lower mold body; a first flow path system is arranged in the lower die and arranged on the outer side of the lower die in a surrounding mode, and the two ends of the first flow path system penetrate through the side face of the lower die respectively and serve as a first flow path inlet and a first flow path outlet respectively. On the basis, the lower die can be kept at low production cost, and meanwhile, the internal temperature of the die cavity can be quickly changed after the medium is introduced into the flow path system, so that the production efficiency of the sole is improved.

Description

Technical Field

[0001] This application relates to the field of shoe mold design, and particularly to a sole mold with rapid heat exchange. Background Art

[0002] A sole mold is an important tool for manufacturing soles in industrial production. It can obtain the required sole products through methods such as injection molding, blow molding, extrusion, and foaming. By reasonably designing the flow path system of the mold, functions such as rapid heating and cooling during the production process can be achieved, thereby accelerating the production rhythm and improving production efficiency.

[0003] Currently, Chinese Patent No. CN117584513A discloses a sole manufacturing method and the sole obtained thereby. The sole includes a sole body and a film coated on the outer surface of the sole body, and the two are tightly bonded together. In the specific processing process, the film is laid on the surface of the lower mold and preheated, and then the thin plate is tightly adsorbed on the inner wall of the cavity of the lower mold by means of negative pressure adsorption. Secondly, foamed pellets or pre-foamed embryos are filled into the cavity, the cavity is closed, and then the air between the foaming material and the film is pumped out by the negative pressure of the upper mold, and then the shoe mold is heated to make the film tightly adhered to the foaming material, and the sole can be obtained.

[0004] In view of the above related technical solutions, since it is necessary to continuously evacuate the lower mold to form a negative pressure during the sole production process, the heat of the lower mold will be continuously carried away during the evacuation process. Therefore, it is necessary to continuously introduce a heat medium into the flow path system to maintain the temperature of the cavity. Since the flow path system and the negative pressure holes inside the lower mold are not connected to each other, sufficient space needs to be reserved for avoidance, resulting in a relatively large volume and weight of the lower mold and a relatively high production cost. At the same time, the distance between the flow path system and the cavity is relatively far. When a medium is introduced into the flow path system for heating or cooling, the response speed of the temperature inside the cavity is relatively slow, and the heating and cooling efficiency is low, which affects the production efficiency of the sole and thus needs to be improved. Summary of the Utility Model

[0005] Based on this, this application provides a sole mold with rapid heat exchange, which can keep the production cost of the lower mold relatively low, and at the same time can make the temperature inside the cavity change rapidly after the medium is introduced into the flow path system, so as to improve the production efficiency of the sole.

[0006] The sole mold with rapid heat exchange provided by this application adopts the following technical solutions:

[0007] A sole mold with rapid heat exchange, including a lower mold obtained by 3D printing. The lower mold is provided with a mold cavity for sole forming, and the inner wall of the mold cavity is provided with first negative pressure holes penetrating through the side surface of the lower mold; a first flow path system is arranged inside the lower mold, and the first flow path system is arranged around the outside of the lower mold. The two ends of the first flow path system respectively penetrate through the side surface of the lower mold to be used as a first flow path inlet and a first flow path outlet respectively.

[0008] By adopting the above technical solution, the lower mold of the present application is obtained by 3D printing. In the 3D printing method, the setting of the first flow path system is more flexible, and various required and relatively complex-shaped flow paths can be processed according to design needs. By keeping the space between the non-connected first flow path system and the first negative pressure holes compact, it is beneficial to reduce the overall volume and processing materials of the lower mold, and can reduce the production cost of the lower mold; moreover, the lower mold obtained by 3D printing and its first flow path system can be closer to the mold cavity through modeling design. Then, after the medium is introduced into the first flow path system, the temperature inside the mold cavity can change rapidly, achieving the effect of rapid heating or rapid cooling, so as to improve the production efficiency of the sole.

[0009] Optionally, the first flow path system includes two meandering flow paths and a commutation flow path connected to the ends of the two meandering flow paths. The two meandering flow paths are respectively located on two opposite sides of the mold cavity, and one end of each meandering flow path far from the commutation flow path penetrates through the side surface of the lower mold.

[0010] By adopting the above technical solution, after steam, cooling water or other media are introduced into the first flow path system, the media can flow through the meandering flow path, the commutation flow path and the other meandering flow path in sequence; since the first flow path system is close to the mold cavity, the temperature inside the mold cavity can change rapidly, so as to facilitate heating or cooling the mold cavity.

[0011] Optionally, the meandering flow path extends in a wave shape, the peak section of the meandering flow path is close to the open side of the mold cavity, and the trough section of the meandering flow path is located below the mold cavity.

[0012] By adopting the above technical solution, by making the peak section of the meandering flow path close to the open side of the mold cavity and the trough section of the meandering flow path located below the mold cavity, the meandering flow path can be bent and extended outside the mold cavity; when the medium enters the meandering flow path, the medium can exchange heat with various positions of the mold cavity, which is beneficial to keeping the temperature of each position of the mold cavity relatively balanced and stable.

[0013] Optionally, the first flow path system includes two groups of curved flow paths alternately arranged on two opposite sides of the mold cavity along the length direction of the mold cavity, and an extension flow path is connected between the ends of each curved flow path and the ends of the adjacent curved flow path on the other side; the two curved flow paths located at the edge respectively penetrate through the side surface of the lower mold.

[0014] By adopting the above technical solution, after introducing media such as steam or cooling water into the first flow path system, the media can flow unidirectionally through each curved flow path and each extended flow path in sequence, that is, alternately flow through the outer peripheral side of the mold cavity, enabling the media to exchange heat with each position of the mold cavity, and also facilitating the temperature of each position of the mold cavity to remain relatively balanced and stable.

[0015] Optionally, the sole mold further includes a heat insulation mold, and the heat insulation mold includes a vacuum bottom mold and heat insulation layers provided on the inner side walls of the vacuum bottom mold. The lower mold is detachably fixed to the vacuum bottom mold, and a vacuum gap for heat insulation and heat preservation is formed between the vacuum bottom mold and the lower mold; a vacuum port communicating with the vacuum gap is provided on the outer wall of the vacuum bottom mold, and the vacuum port is used to cooperate with the first vacuum pumping device of the machine table base to form a negative pressure.

[0016] By adopting the above technical solution, when the sole mold of the present application is in use, the first vacuum pumping device is used to pump vacuum into the vacuum port to form a negative pressure, and the air inside the cavity of the lower mold can enter the vacuum gap through the first negative pressure hole and be extracted by the vacuum port, so that the film is adsorbed on the inner wall of the mold cavity; the setting of the heat insulation layer can weaken the heat exchange between the lower mold and the outside air when heating and raising the temperature of the lower mold, playing a heat preservation effect. In addition, the setting of the heat insulation layer enables a closed vacuum gap to be formed between the vacuum bottom mold and the lower mold. After the air inside the mold cavity is extracted from the first negative pressure hole, it will move a certain distance in the vacuum gap and then leave through the vacuum port. The extension of the air movement distance can reduce the heat loss, and thus play a role in heat insulation and heat preservation, so that the temperature inside the lower mold and the set temperature of the heat supply are kept within a small difference range to ensure the molding quality of the sole.

[0017] Optionally, two plug-in pipes are fixed to the inner bottom wall of the vacuum bottom mold, and the plug-in pipes are in plug-in fit with the first flow path inlet / the second flow path inlet; two communication passages are provided inside the vacuum bottom mold, and each communication passage is communicated with the plug-in pipe, and the end of each communication passage far from the plug-in pipe penetrates to the side surface of the vacuum bottom mold.

[0018] By adopting the above technical solution, when the lower mold is fixed to the vacuum bottom mold, the two plug-in pipes can be respectively inserted into the first flow path inlet and the second flow path inlet. By introducing media such as steam or cooling water into one of the communication passages, the media can flow unidirectionally in the flow path system, playing the role of quickly heating up or cooling down while reducing the situation of media blockage inside the first flow path system to ensure the normal use of the sole mold.

[0019] Optionally, a sealing gasket is bonded to the outer peripheral surface of the plug-in pipe.

[0020] By adopting the above technical solution, when the plugging pipeline is inserted into the port of the flow path system, the setting of the gasket sleeve can enhance the sealing effect between the plugging pipeline and the flow path system, thereby reducing the possibility of medium leakage.

[0021] Optionally, the sole mold further includes an upper mold obtained by 3D printing. A convex mold is provided on the side surface of the upper mold. In the mold-closing state, the convex mold is located inside the mold cavity.

[0022] An inner concave cavity is provided on the side surface of the upper mold away from the lower mold. The inner concave cavity is used to cooperate with the second vacuum pumping device of the machine table top seat to form negative pressure. A second negative pressure hole communicating with the inner concave cavity is provided on the outer side surface of the convex mold.

[0023] A second flow path system is arranged inside the upper mold. The second flow path system partially passes through the inside of the convex mold, and both ends of the second flow path system penetrate through the side surface of the upper mold respectively, and are used as a second flow path inlet and a second flow path outlet respectively.

[0024] By adopting the above technical solution, 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 inside the mold cavity, the upper mold and the lower mold are closed. The second vacuum pumping device is used to pump vacuum into the inner concave cavity to form 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 pumped out by the second vacuum pumping 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. In addition, the upper mold obtained by 3D printing and its second flow path system can be closer to the convex mold through modeling design. Furthermore, after the medium enters the second flow path system, the temperature of the convex mold can change rapidly, achieving the effect of rapid heating or rapid cooling, so as to improve the production efficiency of the sole.

[0025] Optionally, the second flow path system includes a serpentine flow path arranged on the upper mold and a heat exchange flow path arranged on the convex mold. Both ends of the serpentine flow path penetrate through the side surface of the upper mold respectively; the heat exchange flow path is locally communicated with the serpentine flow path. Both ends of the heat exchange flow path penetrate through the side surface of the convex mold respectively, and a plugging member is fitted at the end of the heat exchange flow path.

[0026] By adopting the above technical solution, by using the plugging member to block both ends of the heat exchange flow path, media such as steam or cooling water can enter the serpentine flow path and then partially enter the heat exchange flow path and return to the serpentine circuit. During the foaming and molding process, the heat exchange flow path can be closer to the foaming material, which is beneficial to the heating and molding and cooling and shaping of the foaming material, and improves the molding efficiency of the sole.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. The lower mold made by 3D printing is more flexible in setting up the first flow path system, and can process various required and relatively complex-shaped flow paths according to design needs. And when modeling and designing, by making the first flow path system closer to the mold cavity, after the medium enters the first flow path system, the temperature inside the mold cavity can change rapidly, achieving the effect of rapid heating or rapid cooling.

[0029] 2. By making the peak segments of the meandering flow path close to the open side of the mold cavity and the valley segments of the meandering flow path located below the mold cavity, the meandering flow path can be bent and extended on the outside of the mold cavity; when the medium enters the meandering flow path, the medium can exchange heat with various positions of the mold cavity, which is beneficial to keeping the temperature of each position of the mold cavity relatively balanced and stable.

[0030] 3. When the lower mold is fixed to the vacuum bottom mold, the two plug-in pipes can be respectively inserted into the first flow path inlet and the second flow path inlet. By introducing the medium into one of the communication passages, the medium can flow unidirectionally in the flow path system, achieving rapid heating or cooling while reducing the situation of the medium being blocked inside the first flow path system to ensure the normal use of this sole mold. Description of the Drawings

[0031] Figure 1 is a schematic structural diagram of the upper mold, middle mold, lower mold and heat insulation mold in Embodiment 1;

[0032] Figure 2 is a schematic overall structural diagram of the sole mold in Embodiment 1;

[0033] Figure 3 is a schematic sectional structural diagram of the lower mold in the length direction in Embodiment 1;

[0034] Figure 4 is a schematic sectional structural diagram of the lower mold in the width direction in Embodiment 1;

[0035] Figure 5 is a schematic partial structural diagram of the vacuum bottom mold in Embodiment 1;

[0036] Figure 6 is a schematic sectional structural diagram of the upper mold in the length direction in Embodiment 1;

[0037] Figure 7 is a schematic sectional structural diagram of the lower mold in the length direction in Embodiment 2.

[0038] Description of the reference numerals: 1. Upper die; 11. Punch; 12. Second negative pressure hole; 13. Concave chamber; 14. Second flow path system; 141. Serpentine flow path; 142. Heat exchange flow path; 143. Plugging member; 2. Middle die; 21. Through groove; 3. Lower die; 31. Mold cavity; 32. First negative pressure hole; 33. Extension part; 34. First flow path system; 341. Meandering flow path; 342. Commutation flow path; 343. Bending flow path; 344. Extension flow path;

[0039] 4. Heat insulation die; 41. Vacuum bottom die; 411. Vacuum port; 412. Communication path; 42. Heat insulation layer; 43. Insertion pipe; 44. Sealing gasket sleeve; 5. Vacuum gap; 51. First gap; 52. Second gap; 53. Support plate; 6. Machine base; 61. First vacuum hole; 7. Machine top seat; 71. Second vacuum hole; 8. Insertion structure; 81. Insertion convex column; 82. Insertion groove. Detailed implementation manners

[0040] The following further describes the present application in detail with reference to the Figure 1-7 accompanying drawings.

[0041] Embodiment 1

[0042] The embodiment of the present application discloses a sole mold with rapid heat exchange.

[0043] Referring to Figure 1 , a sole mold with rapid heat exchange includes an upper die 1, a middle die 2, a lower die 3 and a heat insulation die 4 arranged in sequence; a punch 11 is fixed on the side of the upper die 1 close to the lower die 3, and the middle die 2 is provided with a through groove 21 for the punch 11 to pass through in a matching manner; a mold cavity 31 is arranged on the side of the lower die 3 close to the upper die 1, and the shape of the mold cavity 31 is adapted to that of the punch 11. When the upper die 1, the middle die 2 and the lower die 3 are mutually clamped, the punch 11 can pass through the through groove 21 and enter the inside of the mold cavity 31, so that a closed space can be formed inside the mold cavity 31 for the sole to be foamed and formed.

[0044] The heat insulation die 4 includes a vacuum bottom die 41 and a heat insulation layer 42. The vacuum bottom die 41 is made of an aluminum alloy material, and the vacuum bottom die 41 is fixed on the side of the lower die 3 away from the upper die 1; the heat insulation layer 42 is adhesively fixed on each inner side wall of the vacuum bottom die 41, and the heat insulation layer 42 is made of a material with a low thermal conductivity coefficient, which can weaken the heat exchange between the lower die 3 and the outside air and play an effect of heat insulation and heat preservation.

[0045] It should be noted that, in this embodiment, the outer peripheral dimension of the lower die 3 is smaller than the inner peripheral dimension of the vacuum bottom die 41, and an insertion structure 8 is arranged between the lower die 3 and the vacuum bottom die 41; referring to Figure 2, after the lower mold 3 is fixed to the vacuum bottom mold 41, the lateral positioning between the lower mold 3 and the vacuum bottom mold 41 can be achieved through the insertion structure 8. At this time, the lower mold 3 and the heat insulation layer 42 can be arranged at intervals to form a first gap 51, and the lower mold 3 and the vacuum bottom mold 41 can be arranged at intervals to form a second gap 52. It can be seen that the first gap 51 and the second gap 52 can communicate with each other and jointly form a vacuum gap 5.

[0046] Back to Figure 1 , extension parts 33 are respectively arranged around the lower mold 3. Each extension part 33 is integrally formed with the lower mold 3, and each extension part 33 is located on the side of the lower mold 3 close to the upper mold 1. The insertion structure 8 includes an insertion convex column 81 and an insertion groove 82 adapted to be inserted therewith. In this embodiment, the insertion convex column 81 is integrally formed on the side of the extension part 33 away from the upper mold 1, and the insertion groove 82 is formed on the side of the vacuum bottom mold 41 close to the upper mold 1; by correspondingly inserting the insertion convex column 81 into the insertion groove 82, the effect of accurately positioning the lower mold 3 can be achieved.

[0047] It should be noted that in another implementable embodiment, the insertion convex column 81 can be integrally formed on the side of the vacuum bottom mold 41 close to the upper mold 1, and the insertion groove 82 can be correspondingly formed on the side of the extension part 33 away from the upper mold 1, which can also achieve the lateral positioning between the lower mold 3 and the vacuum bottom mold 41.

[0048] Refer to simultaneously Figure 2 , a plurality of first negative pressure holes 32 are provided on the inner wall of the cavity 31 of the lower mold 3. One end of some of the first negative pressure holes 32 away from the cavity 31 communicates with the first gap 51, and one end of the remaining first negative pressure holes 32 away from the cavity 31 communicates with the second gap 52; a vacuum port 411 is opened on the side of the vacuum bottom mold 41 away from the lower mold 3. The vacuum port 411 penetrates through the inner side of the vacuum bottom mold 41 and is connected to the vacuum gap 5.

[0049] When the lower mold 3 of this sole mold is in use, the vacuum bottom mold 41 will be installed on the machine base 6 of the molding equipment. 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 provided with a first vacuum pumping device for connecting with the first vacuum hole 61. By controlling the operation of the first vacuum pumping device, the air inside the cavity 31 can be sequentially extracted through the first negative pressure holes 32, the vacuum gap 5, the vacuum port 411 and the first vacuum hole 61, so as to form a negative pressure inside the cavity 31.

[0050] When foaming and molding the sole, by laying a thin film on the surface of the cavity 31 of the lower mold 3 and using the middle mold 2 to press the thin film against the lower mold 3, preheating the thin film can make the thin film in an extended state; then controlling the operation of the first vacuum pumping device, the first vacuum pumping device pumps out the air inside the cavity 31, which can form a negative pressure in the first negative pressure holes 32 and make the thin film adsorbed on the inner wall of the cavity 31.

[0051] A first flow path system 34 for supplying steam heating or water cooling is provided inside the lower mold 3; referring to Figure 3 , Figure 4 , the first flow path system 34 in this embodiment includes a reversing flow path 342 and two meandering flow paths 341. The two meandering flow paths 341 are respectively arranged on two opposite sides of the cavity 31. The meandering flow path 341 extends in a wave shape. The peak section of each meandering flow path 341 is close to the open end of the cavity 31, that is, the peak section is close to the side of the lower mold 3 close to the upper mold 1; the trough section of each meandering flow path 341 faces the lower position of the cavity 31. In addition, one end of each meandering flow path 341 penetrates through the side of the lower mold 3 away from the upper mold 1, and can be used as the first flow path inlet and the first flow path outlet of the first flow path system 34 respectively.

[0052] An extension flow path 344 is arranged between the two meandering flow paths 341, and the end of each extension flow path 344 is connected to the end of the adjacent meandering flow path 341, so that the first flow path system 34 can form a one-way channel. It should be noted here that the upper mold 1 in this embodiment is processed by 3D printing. In the 3D printing method, the setting of the first flow path system 34 and the first negative pressure holes 32 is more flexible, and various required and relatively complex-shaped flow paths can be processed according to design needs; and through modeling design, the first flow path system 34 and the first negative pressure holes 32 are more compact, which can save the production cost of the lower mold 3; and the first flow path system 34 is closer to the cavity 31, which can quickly heat or cool the cavity 31, so as to improve the production efficiency of the sole.

[0053] Referring to Figure 5 , two plug-in pipes 43 are fixed on the inner bottom wall of the vacuum bottom mold 41. A sealing gasket sleeve 44 is fixedly sleeved on the outer peripheral surface of each plug-in pipe 43. When the lower mold 3 is fixed on the vacuum bottom mold 41, the two plug-in pipes 43 can be respectively inserted into the two ports of the flow path system, and the setting of the sealing gasket sleeve 44 can improve the sealing performance between the plug-in pipe 43 and the port of the flow path system.

[0054] On the outer side of the vacuum bottom mold 41, two communication passages 412 are also provided, and the two communication passages 412 are respectively and correspondingly communicated with the two plug-in pipes 43; when the lower mold 3 is fixed to the vacuum bottom mold 41, by introducing a medium such as steam or cooling water into one of the communication passages 412, the medium can enter the flow path system unidirectionally and be discharged from the other communication passage 412, which can reduce the situation that the medium is blocked inside the flow path system while achieving rapid heating or cooling, so as to ensure the normal use of the sole mold.

[0055] Back to Figure 2 , on the side of the upper mold 1 away from the lower mold 3, an inner concave chamber 13 is provided, and the punch 11 and the upper mold 1 are jointly provided with a plurality of second negative pressure holes 12, and each of the second negative pressure holes 12 is communicated with the inner concave chamber 13. When the upper mold 1 of this sole mold is in use, the vacuum bottom mold 41 will be installed on the machine table top seat 7 of the molding equipment, and the machine table top seat 7 is provided with a second vacuum hole 71, and the second vacuum hole 71 can be communicated with the inner concave chamber 13; the molding equipment is equipped with a second vacuum pumping device for connecting with the second vacuum hole 71, and by controlling the operation of the second vacuum pumping device, the air inside the mold cavity 31 can be sequentially extracted through the second negative pressure holes 12, the inner concave chamber 13 and the second vacuum hole 71.

[0056] When performing the foaming molding of the sole, after the film is adsorbed on the inner wall of the mold cavity 31 by the negative pressure of the first negative pressure hole 32, the foaming material is filled into the mold cavity 31 and abutted against the film, the upper mold 1 and the lower mold 3 are closed, and the operation of the second vacuum pumping device is controlled to extract the air between the foaming material and the film, which is beneficial to the tight bonding between the foaming material and the film and improves the molding quality of the sole.

[0057] It should be noted here that the foaming material used in this embodiment can be foamed particles or a foamed embryo body formed by primary foaming molding. In the case of using a foamed embryo body, micropores will be formed during the primary foaming molding of the foamed embryo body to facilitate the discharge of air. At the same time, each of the second negative pressure holes 12 needs to be wound around the outer peripheral edge of the punch 11 for one week to ensure that the air between the foamed embryo body and the film can be smoothly extracted through the gap between the foamed embryo body and the film, ensuring the molding quality.

[0058] Refer to Figure 6, a second flow path system 14 for steam heating or water cooling is provided inside the upper mold 1. The second flow path system 14 in this embodiment includes a serpentine flow path 141 and a heat exchange flow path 142. The serpentine flow path 141 is opened inside the upper mold 1, and the serpentine flow path 141 is serpentinely extended inside the upper mold 1; both ends of the serpentine flow path 141 are respectively connected to the side of the upper mold 1, and can be used as the second flow path inlet and the second flow path outlet of the second flow path system 14. It should be noted that the upper mold 1 in this embodiment is also processed by 3D printing, and the setting of the serpentine flow path 141 and the second negative pressure hole 12 can be more flexible.

[0059] The heat exchange flow path 142 is provided in the male mold 11 and is provided through both sides of the male mold 11. The two ends of the heat exchange flow path 142 are respectively fixedly embedded with plugging pieces 143. The heat exchange flow path 142 is partially connected with the serpentine flow path 141. When the upper mold 1 and the lower mold 3 are molded together, the medium is introduced into the serpentine flow path 141 from the second flow path inlet. The medium can partially enter the heat exchange flow path 142 and return to the serpentine flow path 141. Since the heat exchange flow path 142 is more closely attached to the foaming material, it is beneficial to heat and shape the foaming material and cool and shape it, thereby improving the molding efficiency of the sole.

[0060] Example 2

[0061] The embodiment of the present application discloses a rapid heat exchange sole mold.

[0062] Reference Figure 7 , the embodiment of the present application discloses a sole mold for rapid heat exchange, and the remaining components are the same as those in the embodiment 1, and will not be described one by one here; the difference from the embodiment 1 is that the first flow path system 34 in the present embodiment includes a plurality of curved flow paths 343, all of which are divided into two groups, and the two groups of curved flow paths 343 are alternately arranged on the two opposite sides of the mold cavity 31 along the length direction of the mold cavity 31; the two curved flow paths 343 located at the edge are respectively connected to the side of the lower mold 3. In addition, an extension flow path 344 is provided between the end of each curved flow path 343 and the end of the adjacent curved flow path 343 on the other side, and each extension flow path 344 is located directly below the mold cavity 31, and all the extension flow paths 344 are arranged at intervals along the length direction of the mold cavity 31.

[0063] After a medium such as steam or cooling water is introduced into the first flow path system 34, the medium can flow unidirectionally through each curved flow path 343 and each extended flow path 344 in sequence, that is, alternately flow through the outer peripheral side of the mold cavity 31, so that the medium can exchange heat with various positions of the mold cavity 31, which is also beneficial to maintaining relative balance and stability of the temperature at various positions of the mold cavity 31.

[0064] The above are the preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A sole mold with rapid heat exchange, characterized in that: It includes a lower mold (3) obtained by 3D printing. The lower mold (3) is provided with a mold cavity (31) for sole molding. The inner wall of the mold cavity (31) is provided with a first negative pressure hole (32) penetrating through the side surface of the lower mold (3). A first flow path system (34) is arranged inside the lower mold (3). The first flow path system (34) is arranged in a surrounding manner outside the lower mold (3). The two ends of the first flow path system (34) respectively penetrate through the side surface of the lower mold (3) to be used as a first flow path inlet and a first flow path outlet respectively.

2. The sole mold for rapid heat exchange according to claim 1, characterized in that: The first flow path system (34) includes two winding flow paths (341) and a commutation flow path (342) connected to the ends of the two winding flow paths (341). The two winding flow paths (341) are respectively located on two opposite sides of the mold cavity (31), and one end of each winding flow path (341) far from the commutation flow path (342) penetrates through the side surface of the lower mold (3).

3. The sole mold for rapid heat exchange according to claim 2, characterized in that: The winding flow path (341) extends in a wavy shape. The peak section of the winding flow path (341) is close to the open side of the mold cavity (31), and the trough section of the winding flow path (341) is located below the mold cavity (31).

4. The sole mold for rapid heat exchange according to claim 1, characterized in that: The first flow path system (34) includes two groups of curved flow paths (343) alternately arranged on two opposite sides of the mold cavity (31) along the length direction of the mold cavity (31). An extension flow path (344) is connected and arranged between the ends of each curved flow path (343) and the ends of the adjacent curved flow path (343) on the other side. The two curved flow paths (343) located at the edge respectively penetrate through the side surface of the lower mold (3).

5. The sole mold for rapid heat exchange according to claim 1, characterized in that: It further includes a heat insulation mold (4). The heat insulation mold (4) includes a vacuum bottom mold (41) and a heat insulation layer (42) arranged on each inner side wall of the vacuum bottom mold (41). The lower mold (3) is detachably fixed to the vacuum bottom mold (41), and a vacuum gap (5) for heat insulation and heat preservation is formed between the vacuum bottom mold (41) and the lower mold (3). A vacuum port (411) communicating with the vacuum gap (5) is arranged on the outer wall of the vacuum bottom mold (41). The vacuum port (411) is used to cooperate with the first vacuum pumping device of the machine base (6) to form negative pressure.

6. The sole mold for rapid heat exchange according to claim 5, characterized in that: Two plug-in pipes (43) are fixed on the inner bottom wall of the vacuum bottom mold (41). The plug-in pipes (43) are in plug-in fit with the first flow path inlet / second flow path inlet. Two communication passages (412) are arranged inside the vacuum bottom mold (41). Each communication passage (412) is connected to the plug-in pipe (43). One end of the communication passage (412) far from the plug-in pipe (43) penetrates to the side surface of the vacuum bottom mold (41).

7. The sole mold for rapid heat exchange according to claim 6, characterized in that: A sealing gasket is bonded to the outer peripheral surface of the plug-in pipe (43).

8. The sole mold with rapid heat exchange according to claim 1, characterized in that: It further includes an upper mold (1) obtained by 3D printing. A convex mold (11) is arranged on the side surface of the upper mold (1). In the mold closing state, the convex mold (11) is located inside the mold cavity (31). The side of the upper mold (1) away from the lower mold (3) is provided with a concave chamber (13), and the concave chamber (13) is used to cooperate with the second vacuum pumping device of the machine table top seat (7) to form a negative pressure. A second negative pressure hole (12) communicating with the concave chamber (13) is provided on the outer side of the punch (11). A second flow path system (14) is arranged inside the upper mold (1). The second flow path system (14) partially passes through the inside of the punch (11), and both ends of the second flow path system (14) penetrate through the side surface of the upper mold (1) respectively to be used as a second flow path inlet and a second flow path outlet respectively.

9. The sole mold for rapid heat exchange according to claim 8, characterized in that: The second flow path system (14) includes a serpentine flow path (141) arranged on the upper mold (1) and a heat exchange flow path (142) arranged on the punch (11). Both ends of the serpentine flow path (141) penetrate through the side surface of the upper mold (1) respectively. The heat exchange flow path (142) is locally communicated with the serpentine flow path (141). Both ends of the heat exchange flow path (142) penetrate through the side surface of the punch (11) respectively, and a plugging member (143) is fittedly embedded at the end of the heat exchange flow path (142).

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