Shoe injection molding mold and shoe

Abstract

The utility model discloses a shoe injection molding mold and a shoe, the shoe injection molding mold comprises a lower mold, an upper mold, a material injection channel and an airflow channel, the lower mold is provided with a first cavity; the upper die abuts against the lower die, at least partial section of the upper die is located in the first cavity to fill partial space of the first cavity and seal the first cavity, and the remaining space of the first cavity forms a sealed forming cavity; the material injection channel is arranged on the lower mold or the upper mold, the material injection channel is communicated with the forming cavity so as to inject a foaming material into the forming cavity, and the material injection channel is connected with material injection equipment through a material injection assembly; the airflow channel is arranged on the lower mold or the upper mold, is communicated with the forming cavity, and is connected with negative pressure equipment through an air exhaust assembly so as to vacuumize the forming cavity to form negative pressure. According to the shoe injection molding mold, the foaming rate and the foaming effect of a foaming material can be improved, the density of a sole is reduced, and the lightweight design of a shoe body is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of shoemaking, and particularly relates to an injection molding die for shoes and a shoe. Background Art

[0002] In the related art, the sole is made by foaming a foaming material. However, the density of the sole made by foaming currently is relatively large, resulting in the entire sole being too heavy and unable to meet the further demand for lightweight. At the same time, in the process of foaming shoes in the related art, the air in the mold cavity is extruded by the pressure generated by in-mold foaming, and more pores will be generated on the surface of the sole due to the exhaust problem, affecting the appearance. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems in the related art to a certain extent.

[0004] To this end, an embodiment of the utility model provides an injection molding die for shoes, which can improve the foaming effect of the foaming material and reduce the density of the sole.

[0005] An embodiment of the utility model also provides a shoe.

[0006] The injection molding die for shoes according to the embodiment of the utility model includes:

[0007] A lower die, which has a first cavity;

[0008] An upper die, which abuts against the lower die. At least part of the upper die is located in the first cavity to fill part of the space of the first cavity and close the first cavity. The remaining space of the first cavity forms a sealed molding cavity;

[0009] A material injection channel, which is arranged on the lower die or the upper die. The material injection channel is communicated with the molding cavity to inject foaming material into the molding cavity. The material injection channel is connected to a material injection device through a material injection assembly;

[0010] An air flow channel, which is arranged on the lower die or the upper die. The air flow channel is communicated with the molding cavity. The air flow channel is connected to a negative pressure device through an air extraction assembly to evacuate the molding cavity to form a negative pressure.

[0011] The injection molding die for shoes according to the embodiment of the utility model can improve the gas discharge effect in the die by evacuating the molding cavity to a negative pressure, utilize the negative pressure environment in the molding cavity to improve the foaming rate and foaming effect of the foaming material, reduce the density of the sole, and realize the lightweight design of the shoe body.

[0012] In some embodiments, the orifice of the material injection channel is located at one end of the molding cavity, and the orifice of the air flow channel is located at the other end of the molding cavity, which is far from the orifice of the material injection channel.

[0013] In some embodiments, the molding cavity has a first end and a second end. The first end corresponds to the heel part of the sole to be molded, and the second end corresponds to the toe part of the sole to be molded.

[0014] The orifice of the material injection channel is located at one of the first end and the second end, and the orifice of the air flow channel is located at the other of the first end and the second end.

[0015] In some embodiments, a filter element is disposed in the air flow channel. The filter element is disposed at the end of the air flow channel close to the molding cavity. The filter element is used for ventilation and preventing the foaming material from entering the air flow channel; or

[0016] The air flow channel includes a first section close to the molding cavity and a second section communicating with the first section. The first section includes a plurality of capillary through holes formed in the upper mold or the lower mold. The capillary through holes communicate with the molding cavity and the second section. The plurality of capillary through holes are used for ventilation and preventing the foaming material from entering the air flow channel.

[0017] In some embodiments, the lower mold includes a bottom mold and a plurality of side molds. The bottom mold and the plurality of side molds can approach and abut against each other or move away from each other. The bottom mold and the plurality of side molds define the first cavity.

[0018] The bottom mold has a first surface, which corresponds to the lower part of the sole to be molded. The plurality of side molds are arranged along the circumference of the bottom mold. The side mold has a second surface, which corresponds to the side part of the sole to be molded.

[0019] The first surface, the plurality of second surfaces and the upper mold together define the molding cavity.

[0020] In some embodiments, both the material injection channel and the air flow channel are provided on the upper mold.

[0021] Or, both the material injection channel and the air flow channel are provided on the bottom mold.

[0022] Or, both the material injection channel and the air flow channel are provided on the side mold.

[0023] Or, one of the material injection channel and the air flow channel is provided on the upper mold, and the other is provided on the side mold.

[0024] Alternatively, one of the material injection channel and the air flow channel is provided on the upper mold, and the other is provided on the bottom mold;

[0025] Alternatively, one of the material injection channel and the air flow channel is provided on the side mold, and the other is provided on the bottom mold.

[0026] In some embodiments, the air flow channel is provided on the upper mold, the material injection channel is provided on the side mold, the air flow channel penetrates through the upper mold, one end of the air flow channel communicates with the molding cavity and is away from the material injection channel, the other end of the air flow channel is connected to the negative pressure device, the number of the side molds is two and they are abutted against each other, grooves are formed on the abutting surfaces of the two side molds, the openings of the two grooves are arranged opposite to each other and jointly define the material injection channel.

[0027] In some embodiments, both the air flow channel and the material injection channel are provided on the side mold, the number of the side molds is two and they are abutted against each other, the air flow channel penetrates through one of the side molds, one end of the air flow channel communicates with the molding cavity and is away from the material injection channel, the other end of the air flow channel is connected to the negative pressure device, grooves are formed on the abutting surfaces of the two side molds, the openings of the two grooves are arranged opposite to each other and jointly define the material injection channel.

[0028] In some embodiments, the two side molds abut against each other and form a first abutting surface corresponding to the heel part of the sole to be molded and a second abutting surface corresponding to the toe part of the sole to be molded, the material injection channel is arranged on one of the first abutting surface and the second abutting surface, the orifice of the air flow channel close to the molding cavity is arranged on the other of the first abutting surface and the second abutting surface, a recessed part is arranged on the abutting surface where the orifice of the air flow channel close to the molding cavity is located, the orifice of the air flow channel is located in the recessed part, and the recessed part communicates with the molding cavity to quickly extract the gas in the molding cavity.

[0029] In some embodiments, a first sealing member is arranged between the bottom mold and the side mold, the first sealing member is a sealing gasket arranged on the upper surface of the bottom mold or the first sealing member is a sealing ring arranged along the circumferential direction of the side surface of the bottom mold to seal the gap between the bottom mold and the side mold; and / or

[0030] A second sealing member is arranged between two adjacent side molds to seal the gap between two adjacent side molds; and / or

[0031] A third sealing member is arranged between the upper mold and the side mold, the third sealing member is a sealing ring arranged along the circumferential direction of the upper mold, and the side mold abuts against the sealing ring of the upper mold during mold closing to seal the gap between the side mold and the upper mold; and / or

[0032] The number of the side molds is two, and the two side molds are movable along the width direction of the molding cavity; and / or

[0033] The bottom mold is movable along the thickness direction of the molding cavity; and / or

[0034] The upper mold is a shoe last.

[0035] The shoe according to an embodiment of the present invention includes:

[0036] A sole, which is formed by the above-mentioned shoe injection molding die;

[0037] An upper, the bottom of which has a midsole cloth. When the sole is formed, the upper and the midsole cloth are sleeved on the upper mold of the shoe injection molding die, and the formed sole is integrally connected to the upper and the midsole cloth.

[0038] In some embodiments, it further includes a plurality of first support members, and the plurality of first support members are respectively arranged at a plurality of stress points corresponding to the human foot in the sole. At least a part of the section of the first support member is embedded in the sole, and the hardness of the first support member is greater than the hardness of the sole.

[0039] In some embodiments, the number of the first support members is three, and the three first support members are arranged on the sole at intervals, and the three first support members respectively correspond to the calcaneus, the first metatarsal bone and the fifth metatarsal bone of the human foot; and / or

[0040] The material of the first support member is foam metal; and / or

[0041] The density of the first support member is 0.1-1 g / cm 3 .

[0042] In some embodiments, it further includes a second support member, and the second support member is arranged at the shoe waist of the sole. At least a part of the section of the second support member is embedded in the sole, and the hardness of the second support member is greater than the hardness of the sole.

[0043] In some embodiments, the material of the second support member is carbon fiber composite material; and / or

[0044] The density of the second support member is 1-2 g / cm 3 .

[0045] In some embodiments, the density of the sole is 0.1-0.4 g / cm 3 . Description of the Drawings

[0046] Figure 1 It is a schematic structural diagram of a footwear injection molding die according to an embodiment of the present utility model.

[0047] Figure 2 It is a schematic exploded view of the lower die of a footwear injection molding die according to an embodiment of the present utility model.

[0048] Figure 3 It is a schematic structural diagram of the upper die (shoe last) of a footwear injection molding die according to an embodiment of the present utility model.

[0049] Figure 4 It is a schematic diagram of the position of an air flow channel in a footwear injection molding die according to an embodiment of the present utility model.

[0050] Figure 5 It is a schematic diagram of the position of an air flow channel in a footwear injection molding die according to another embodiment of the present utility model.

[0051] Figure 6 It is a schematic diagram of the positions of an air flow channel and a material injection channel in a footwear injection molding die according to an embodiment of the present utility model.

[0052] Figure 7 It is a schematic diagram of the positions of an air flow channel and a material injection channel in a footwear injection molding die according to another embodiment of the present utility model.

[0053] Figure 8 It is a schematic diagram of the positions of an air flow channel and a material injection channel in a footwear injection molding die according to yet another embodiment of the present utility model.

[0054] Figure 9 It is a schematic exploded view of a shoe according to an embodiment of the present utility model.

[0055] Reference numerals:

[0056] 1. Lower die; 11. First cavity; 12. Bottom die; 121. First surface; 13. Side die; 131. Second surface; 132. First abutting surface; 133. Second abutting surface; 134. Depression; 14. First seal;

[0057] 2. Upper die;

[0058] 3. Material injection channel;

[0059] 4. Air flow channel; 41. Channel opening;

[0060] 5. Shoe upper; 51. Midsole cloth; 52. First support member; 53. Second support member;

[0061] 6. Shoe sole;

[0062] 7. Material injection device; 71. Material injection assembly;

[0063] 8. Negative pressure device; 81. Air extraction component. Detailed implementation mode

[0064] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0065] The following combines Figures 1 to 9 to elaborate in detail on the footwear injection molding die, equipment, manufacturing method, and shoes of the embodiments of the present utility model.

[0066] As Figures 1 - 3 shown, the footwear injection molding die of the embodiments of the present utility model includes a lower die 1 and an upper die 2. The lower die 1 has a first cavity 11. The upper die 2 abuts against the lower die 1. At least part of the section of the upper die 2 is located in the first cavity 11 to fill part of the space of the first cavity 11 and close the first cavity 11. The remaining space of the first cavity 11 forms a sealed molding cavity. It should be understood that after the lower die 1 and the upper die 2 are closed, a molding cavity can be formed. Foaming material is injected into the molding cavity. After the foaming material foams, skins, and cures in the molding cavity, a shoe sole is formed.

[0067] The footwear injection molding die further includes a material injection channel 3 and an air flow channel 4. The material injection channel 3 is provided on the lower die 1 or the upper die 2. The material injection channel 3 is communicated with the molding cavity to inject foaming material into the molding cavity. The material injection channel 3 is connected to a material injection device 7 through a material injection component 71. The air flow channel 4 is provided on the lower die 1 or the upper die 2. The air flow channel 4 is communicated with the molding cavity. The air flow channel 4 is connected to a negative pressure device 8 through an air extraction component 81 to evacuate the molding cavity to form a negative pressure.

[0068] It should be noted that the material injection channel 3 is used to inject foaming material into the molding cavity. The air flow channel 4 is used to exhaust the gas in the molding cavity and can make the molding cavity in a negative pressure state. On the one hand, the foaming material foams in the molding cavity in a negative pressure state, which can improve the foaming rate and foaming effect of the foaming material, and helps the foaming material to form a shoe sole with a lower density in the molding cavity. On the other hand, it can simultaneously exhaust the gas generated during the foaming process of the foaming material, avoiding these gases from forming pores on the surface of the shoe sole and affecting the appearance of the shoe sole.

[0069] Among them, the material injection component 71 includes components such as a material injection pipe, a material injection head, a mixing part, and a control valve. The air extraction component includes components such as an air extraction pipe and a control valve.

[0070] The footwear injection molding die of the embodiments of the present utility model utilizes the negative pressure environment in the molding cavity to improve the foaming rate and foaming effect of the foaming material, reduce the density of the shoe sole 6, and achieve the lightweight design of the shoe body. At the same time, by evacuating the negative pressure in the molding cavity, the gas discharge effect in the die can be improved.

[0071] Compared with the density of the sole made of conventional foaming materials in the related art being 0.4 - 0.5 g / cm 3 , the mold in the embodiment of the present utility model can reduce the density of the produced sole to 0.1 - 0.4 g / cm 3 , more preferably, by appropriately adjusting the ratio of the foaming materials, optimizing the foaming rate and the curing time, the density of the produced sole can reach 0.1 - 0.3 g / cm 3 , and the mechanism for generating this effect will be further described below.

[0072] In some embodiments, the orifice of the injection channel 3 is located at one end of the molding cavity, and the orifice of the air flow channel 4 is located at the other end of the molding cavity far from the orifice of the injection channel 3.

[0073] After the foaming material enters the molding cavity through the injection channel 3, it will foam and diffuse, and generate gas. In order to ensure that the generated gas can be discharged in time, improve the promoting effect of vacuum pumping on the foaming and diffusion of the foaming material, and at the same time prevent the foaming material from entering and blocking the air flow channel 4, the embodiment of the present utility model arranges the injection channel 3 and the air flow channel 4 at opposite ends of the molding cavity, so that the injection channel 3 and the air flow channel 4 are spaced apart and maintain a certain distance. When the foaming material is injected into the molding cavity, the gas generated during the foaming process can be discharged in time through the air flow channel 4, and the foaming material can spread faster, and the density of the cured sole can be reduced.

[0074] Specifically, according to the reaction time, skinning time, diffusion speed and diffusion angle of the foaming material, etc., the minimum distance between the injection channel 3 and the air flow channel 4 is reasonably determined, and then the positions of the injection channel 3 and the air flow channel 4 are reasonably arranged.

[0075] Further, the molding cavity has a first end and a second end. The first end corresponds to the heel part of the sole 6 to be molded, and the second end corresponds to the toe part of the sole 6 to be molded; the orifice of the injection channel 3 is located at one of the first end and the second end, and the orifice of the air flow channel 4 is located at the other of the first end and the second end.

[0076] That is to say, arrange the orifice of the injection channel 3 at the position of the molding cavity corresponding to the toe part of the sole, and arrange the orifice of the air flow channel 4 at the position of the molding cavity corresponding to the heel part of the sole; or arrange the orifice of the air flow channel 4 at the position of the molding cavity corresponding to the toe part of the sole, and arrange the orifice of the injection channel 3 at the position of the molding cavity corresponding to the heel part of the sole.

[0077] At this time, after the foaming material is injected into the molding cavity, the foaming material diffuses from the heel part to the toe part or from the toe part to the heel part. The diffusion speed of the foaming material is relatively uniform, the molding quality is better, and it can ensure that the gas generated by foaming is quickly evacuated from the molding cavity. The negative pressure environment in the molding cavity can further accelerate the diffusion of the foaming material.

[0078] The embodiment of the present utility model can stably draw negative pressure during the process of the foaming material starting to react to skinning in the molding cavity, avoiding the foaming material from blocking the air flow channel 4 and causing periodic exhaust difficulties. The overall foaming and diffusion of the foaming material are uniform and consistent, improving the foaming rate and effect of the foaming material, and being able to meet the requirements of lightweight production of the shoe sole.

[0079] In some embodiments, in order to prevent the foaming material from entering the air flow channel 4, a filter element is further provided in the air flow channel 4 of the embodiment of the present utility model. The filter element is arranged at one end of the air flow channel 4 close to the molding cavity, and the filter element is used for ventilation and preventing the foaming material from entering the air flow channel 4.

[0080] That is to say, the filter element can prevent the foaming material from entering the air flow channel 4, but can ensure the smooth passage of gas, avoiding the inability to effectively draw negative pressure on the molding cavity during subsequent operations after the air flow channel 4 is blocked, reducing the frequency and time consumed for mold cleaning, and improving the practicability.

[0081] Optionally, the filter element is a metal part or a non-metal part such as ceramics. The filter element is embedded at one end of the air flow channel 4 close to the molding cavity, and the filter element is provided with a plurality of capillary through holes. Since the surface of the material has tension during the foaming and curing process of the foaming material, the capillary through holes can allow gas to pass through, but can block the foaming material from entering the air flow channel 4.

[0082] Among them, the filter element does not protrude into the molding cavity. The filter element can be flush with the corresponding wall surface of the molding cavity or form a concave structure on the wall surface of the molding cavity, avoiding affecting the molding of the shoe sole, making the molded shoe sole more flat, and reducing the impact on the appearance of the shoe.

[0083] In another embodiment, the air flow channel 4 includes a first section close to the molding cavity and a second section connected to the first section. The first section includes a plurality of capillary through holes opened on the upper mold 2 or the lower mold 1. The capillary through holes are connected to the molding cavity and the second section, and the plurality of capillary through holes are used for ventilation and preventing the foaming material from entering the air flow channel 4.

[0084] That is to say, in the embodiment of the present utility model, no filter element is provided, but capillary through holes are provided at the positions corresponding to the air flow channel 4 on the upper mold 2 or the lower mold 1. Since the surface of the material has tension during the foaming and curing process of the foaming material, the capillary through holes allow gas to pass through, but can block the foaming material from entering the air flow channel 4.

[0085] For example, the air flow channel 4 is arranged on the upper mold 2. One end of the air flow channel 4 close to the molding cavity is not directly communicated with the molding cavity, but is communicated with the molding cavity through the capillary through holes arranged on the upper mold.

[0086] When the capillary through holes are directly formed on the upper mold or the lower mold, the assembly of the filter element is not required, the assembly process is reduced, and the flatness of the wall surface of the molding cavity can be ensured, and the consistency of the structure is better.

[0087] Such as Figure 2 、 Figures 4 to 8 As shown in the figure, in some embodiments, the lower mold 1 includes a bottom mold 12 and a plurality of side molds 13. The bottom mold 12 and the plurality of side molds 13 can be close to and abut against each other or move away from each other. The bottom mold 12 and the plurality of side molds 13 define a first cavity 11. The bottom mold 12 has a first surface 121, and the first surface 121 corresponds to the lower part of the sole 6 to be molded. The plurality of side molds 13 are arranged along the circumference of the bottom mold 12. The side mold 13 has a second surface 131, and the second surface 131 corresponds to the side part of the sole 6 to be molded; the first surface, the plurality of second surfaces and the upper mold 2 together define a molding cavity.

[0088] It should be understood that since the outer surface of the shoe is an irregular shape, in order to ensure smooth mold closing and mold opening during the shoe manufacturing process and form the outer shape of the designed shoe body, the lower mold 1 in the embodiment of the present invention is divided into a bottom mold 12 and a plurality of side molds 13, and the first cavity 11 is defined by the bottom mold 12 and the side molds 13 together. The bottom mold 12 is used to correspond to the lower part (the side facing the ground) of the sole 6, and the side mold 13 corresponds to the circumference of the sole 6 and is used to define and form the circumferential shape of the sole 6.

[0089] The embodiment of the present invention can reduce the processing and manufacturing difficulty of the mold, reduce the cost, and can also more effectively carry out refined design of the mold, improving the molding quality of the sole. The outer edge structure of the sole adopts a multi-curved surface structure, and the embodiment of the present invention can better highlight the characteristics of different curved surface structures, making the molded sole have a better appearance.

[0090] Specifically, the bottom mold 12 corresponds to the bottom surface of the sole and is used for forming the bottom surface of the sole. The side mold 13 corresponds to the circumferential side surface of the sole. The circumferential side surface of the sole is composed of a plurality of curved surfaces. In order to facilitate mold closing and opening and ensure the appearance of the sole, the number of side molds can be 2 side molds 13, 3 side molds 13 or 5 side molds 13, etc.

[0091] After the bottom mold 12, the plurality of side molds 13 and the upper mold 2 are closed, the first surface, the plurality of second surfaces and the upper mold 2 define a molding cavity.

[0092] Based on the further optimization of the structure of the lower mold 1, the arrangement positions of the injection material channel 3 and the air flow channel 4 can be determined according to the structures of the lower mold 1 and the upper mold 2, the requirements of injection and exhaust, etc. The relative positions of the injection material channel 3 and the air flow channel 4 can also be determined according to the injection position of the foaming material, the diffusion speed of the foaming material, the diffusion and flow pattern of the foaming material in the molding cavity, the requirements of air extraction and exhaust, etc., thereby improving the exhaust effect and the foaming molding effect.

[0093] Optionally, both the injection material channel 3 and the air flow channel 4 are arranged on the upper mold 2. Concentrating the injection material channel 3 and the air flow channel 4 on the upper mold 2 can enable a more flexible structural design of the bottom mold 12 and the side mold 13, and can reduce the influence of the injection material channel 3 and the air flow channel 4 on the structural design of the bottom mold 12 and the side mold 13.

[0094] Optionally, one of the injection material channel 3 and the air flow channel 4 is arranged on the upper mold 2, and the other is arranged on the side mold 13 or the bottom mold 12, which can reduce the design difficulty of a single component and can also provide a more flexible arrangement position. For example, the injection material channel 3 is arranged on the upper mold 2, and the air flow channel 4 is arranged on the side mold 13 or the bottom mold 12. Another example is that the air flow channel 4 is arranged on the upper mold 2, and the injection material channel 3 is arranged on the side mold 13 or the bottom mold 12. In practical applications, the arrangement positions of the injection material channel 3 and the air flow channel 4 can be reasonably determined according to the structures and movement modes of each module, with higher flexibility, avoiding interference between components, and improving the coordination of the entire device.

[0095] Optionally, both the injection material channel 3 and the air flow channel 4 are arranged on the bottom mold 12, that is, both the injection material channel 3 and the air flow channel 4 are arranged on the bottom mold 12. For example, the injection material channel 3 is arranged at a position on the bottom mold 12 near the toe of the shoe sole 6, and the air flow channel 4 is arranged at a position on the bottom mold 12 near the heel of the shoe sole 6.

[0096] Optionally, both the injection material channel 3 and the air flow channel 4 are arranged on the side mold 13. The injection material channel 3 and the air flow channel 4 can be arranged on the same side mold 13, or can be respectively arranged on two different side molds 13.

[0097] Optionally, one of the injection material channel 3 and the air flow channel 4 is arranged on the side mold 13, and the other is arranged on the bottom mold 12. For example, the injection material channel 3 is arranged at a position on the side mold 13 near the heel of the shoe sole 6, and the air flow channel 4 is arranged at a position on the bottom mold 12 near the toe of the shoe sole 6.

[0098] The relative positions of the side mold 13, the bottom mold 12, and the upper mold 2 are different, and there are relative movements during the mold closing and mold opening processes. The air flow channel 4 is used to exhaust gas, and the foaming material is not easily introduced into the air flow channel 4. The injection channel 3 is used to inject the foaming material, and the foaming material is likely to block the injection channel 3. Therefore, based on the above factors, the embodiments of the present invention further optimize the arrangement positions of the air flow channel 4 and the injection channel 3.

[0099] In some embodiments, the air flow channel 4 is provided on the upper mold 2, the injection channel 3 is provided on the side mold 13. The air flow channel 4 penetrates through the upper mold 2. One end of the air flow channel 4 communicates with the molding cavity and is away from the injection channel 3, and the other end of the air flow channel 4 is connected to a negative pressure device. The number of side molds 13 is two and they are abutted against each other. Grooves are formed on the abutting surfaces of the two side molds 13, and the openings of the two grooves are oppositely arranged and jointly define the injection channel 3.

[0100] It should be understood that in the embodiments of the present invention, the air flow channel 4 is arranged in the upper mold 2. After the air flow channel 4 penetrates through the upper mold 2, the negative pressure device evacuates the negative pressure of the molding cavity through the air flow channel 4. The injection channel 3 is arranged on the side mold 13. To facilitate the cleaning of the injection channel 3 and avoid the difficulty in cleaning the foaming material after it solidifies in the injection channel 3, the injection channel 3 of the embodiments of the present invention is formed by splicing two grooves provided on two adjacent side molds 13. For example, the groove is a groove with a semi-circular cross-section formed on the abutting surface of the side mold 13, and the grooves on the two side molds 13 are spliced together to form an injection channel 3 with a circular cross-section.

[0101] When the footwear is foamed and formed, after the mold is opened, the injection channel is opened, and the foaming material in the injection channel 3 can be easily cleaned, without affecting the reuse, and continuous operation can be realized.

[0102] Figure 4 The scheme in which the air flow channel 4 is arranged on the side mold 13 is shown. The air flow channel 4 is connected to the molding cavity through a capillary channel (not shown in the figure), or a filter element is arranged between the orifice of the air flow channel 4 close to the molding cavity and the molding cavity. At this time, the injection channel 3 can be arranged on the bottom mold 12, the side mold 13, or the upper mold 2.

[0103] Figure 5 The scheme in which the air flow channel 4 is arranged on the upper mold 2 is shown. The air flow channel 4 is connected to the molding cavity through a capillary channel (not shown in the figure), or a filter element is arranged between the orifice of the air flow channel 4 close to the molding cavity and the molding cavity. At this time, the injection channel 3 can be arranged on the bottom mold 12, the side mold 13, or the upper mold 2.

[0104] Furthermore, Figure 6It is shown that the air flow channel 4 is provided on the side mold 13 and is located at one end of the molding cavity close to the toe of the sole to be molded, and the injection channel 3 is provided on the side mold 13 and is located at one end of the molding cavity close to the heel of the sole to be molded.

[0105] Figure 7 It is shown that the air flow channel 4 is provided on the bottom mold 12 and is located at one end of the molding cavity close to the toe of the sole to be molded, and the injection channel 3 is provided on the side mold and is located at one end of the molding cavity close to the heel of the sole to be molded.

[0106] Figure 8 It is shown that the air flow channel 4 is provided on the upper mold 2 and is located at one end of the molding cavity close to the toe of the sole to be molded, and the injection channel 3 is provided on the side mold 13 and is located at one end of the molding cavity close to the heel of the sole to be molded.

[0107] Further, Figures 4 to 8 The positions of the air flow channel 4 and the injection channel 3 shown in can be swapped without affecting the opening and closing of the mold and ensuring the quality of the product.

[0108] In some embodiments, both the air flow channel 4 and the injection channel 3 are provided on the side mold 13. The number of side molds 13 is two and they are in contact with each other. The air flow channel 4 penetrates through one of the side molds 13. One end of the air flow channel 4 communicates with the molding cavity and is away from the injection channel 3. The other end of the air flow channel 4 is connected to a negative pressure device. Grooves are formed on the contact surfaces of the two side molds 13. The openings of the two grooves are arranged opposite to each other and jointly define the injection channel 3.

[0109] The air flow channel 4 of the embodiment of the present utility model penetrates through one of the side molds 13. The opening at one end of the air flow channel 4 is connected to the molding cavity and is arranged away from the injection channel 3. The other end of the air flow channel 4 is connected to a negative pressure device for evacuating the molding cavity. The injection channel 3 is provided between two adjacent side molds 13. The injection channel 3 is formed by fitting two grooves provided on two adjacent side molds 13. The injection channel 3 is formed after the side molds 13 are closed and is opened after the mold is opened.

[0110] Further, as Figure 2 shown, the two side molds 13 are in contact with each other and form a first contact surface 132 corresponding to the heel of the sole 6 to be molded and a second contact surface 133 corresponding to the toe of the sole 6 to be molded. The injection channel 3 is provided on one of the first contact surface 132 and the second contact surface 133. The opening 41 of the air flow channel 4 close to the molding cavity is provided on the other of the first contact surface 132 and the second contact surface 133. A recess 134 is provided on the contact surface where the opening 41 of the air flow channel 4 close to the molding cavity is located. The opening 41 of the air flow channel 4 is located in the recess 134. The recess communicates with the molding cavity to quickly extract the gas in the molding cavity.

[0111] In the embodiment of the present utility model, the abutting surfaces corresponding to the adjacent side dies 13 are attached to each other to form an abutting surface. The abutting surface near the heel part of the sole 6 to be formed is the first abutting surface 132, and the abutting surface near the toe part of the sole 6 to be formed is the second abutting surface 133.

[0112] The orifice 41 of the air flow channel 4 near the forming cavity is located on the first abutting surface 132 or the second abutting surface 133, and a recess 134 is provided on the abutting surface. The gas in the forming cavity enters the air flow channel 4 through the recess 134. At this time, the orifice 41 of the air flow channel 4 can be hidden in the first abutting surface 132 or the second abutting surface, thereby better preventing the foaming material from entering the air flow channel 4. At the same time, the gas in the forming cavity can converge to the recess through the gap of the abutting surface, improving the effect of vacuum pumping.

[0113] In the embodiment of the present utility model, by arranging the positions of the injection channel 3 and the air flow channel 4, the gas in the forming cavity can be more effectively pumped out and maintained in a negative pressure state. The sole foaming material foams in a negative pressure environment, thereby achieving a lower density and lighter weight. Different from the related art in which an exhaust channel is provided on the mold, the air flow channel opened in the embodiment of the present utility model can avoid forming protrusions or depressions on the outer peripheral surface of the sole at the position of the air flow channel on the mold, improving the aesthetic degree of the sole.

[0114] In order to ensure the sealing performance of the forming cavity and improve the foaming effect of the foaming material, a sealing structure is provided in the embodiment of the present utility model.

[0115] In some embodiments, a first sealing member 14 is provided between the bottom die 12 and the side die 13. The first sealing member 14 is a sealing gasket provided on the upper surface of the bottom die 12. For example, the sealing gasket is placed above the bottom die 12. When the bottom die 12 abuts against the side die 13, the sealing gasket is pressed between the bottom die 12 and the side die 13 to play a sealing role. Or, the first sealing member 14 is a sealing ring provided along the circumferential direction of the side of the bottom die 12 to seal the gap between the bottom die 12 and the side die 13. An embedding groove is provided in the circumferential direction of the bottom die 12, and the sealing ring is embedded in the embedding groove. When the bottom die 12 and the side die 13 abut against each other, the sealing ring is located between the bottom die 12 and the side die 13 to play a sealing role.

[0116] The first sealing member 14 can be a rubber gasket, a TPU pad or a rubber ring, or can be made of other elastic materials capable of achieving sealing.

[0117] Furthermore, a second sealing member is provided between two adjacent side dies 13 to seal the gap between the two adjacent side dies 13.

[0118] After the mold is closed, the adjacent two side molds 13 are in close contact with each other, and at the same time, their sealing must be ensured. Therefore, a second sealing member can be provided between the two side molds 13. The second sealing member can be a sealing strip embedded in one of the side molds 13, for example, a rubber strip or a TPU strip.

[0119] When the orifice 41 of the air flow channel 4 close to the molding cavity is located on the abutting surface between the two side molds 13, the orifice 41 of the air flow channel 4 close to the molding cavity is located on the side close to the molding cavity of the second sealing member.

[0120] Furthermore, a third sealing member is provided between the upper mold 2 and the side mold 13. The third sealing member is a sealing ring arranged along the circumferential direction of the upper mold 2. The side mold 13 abuts against the sealing ring of the upper mold 2 when the mold is closed to seal the gap between the side mold 13 and the upper mold 2.

[0121] After the mold is closed, the upper mold 2 abuts against the side mold 13. At this time, the elastic third sealing member can ensure the sealing performance between the upper mold 2 and the side mold 13. The third sealing member can be made of rubber material or TPU material.

[0122] In some embodiments, the number of side molds 13 is two. The two side molds 13 are movable along the width direction of the molding cavity, and the bottom mold 12 is movable along the thickness direction of the molding cavity.

[0123] It should be understood that the width direction is the left-right direction in the figure, that is, the width direction of the human foot, and the thickness direction is the up-down direction shown in the figure. The side mold 13 is divided into a left side mold and a right side mold. When the left side mold and the right side mold approach and abut against each other, they also abut against the upper mold 2. The bottom mold 12 rises and abuts against the left side mold and the right side mold, thereby forming the molding cavity.

[0124] In some embodiments, the upper mold 2 is a shoe last. When the shoe upper is sleeved on the shoe last and the sole is molded, the shoe upper and the sole can be connected into one body, and the integrated molding of the shoe can be carried out, improving the overall appearance and comfort of the shoe.

[0125] Among them, the first cavity 11 includes a first chamber and a second chamber that are connected. The first chamber is used to accommodate a part of the shoe last, and the second chamber is the molding cavity for molding the sole.

[0126] In the shoe-making production line, it further includes a machine table and a driving part. The driving part is arranged on the machine table; the shoe injection molding die is connected to the driving part so that each component in the shoe injection molding die can be driven by the driving part to disperse from each other or abut against each other; the injection equipment 7 is communicated with the injection channel 3 of the shoe injection molding die through the injection component 71 to inject foaming material into the molding cavity; the negative pressure equipment 8 is communicated with the air flow channel 4 of the shoe injection molding die through the injection component 71 to form a negative pressure environment in the molding cavity through the air flow channel 4.

[0127] Among them, the negative pressure device includes a vacuum pump and a control valve, and the vacuum pumping speed in the molding cavity can be adjusted through the control valve, and the negative pressure value in the molding cavity can be further controlled.

[0128] The driving part can be multiple drivers, which are used to drive the actions of different components in the shoe injection molding die respectively. For example, the drivers include a first driver, a second driver, and a third driver, which respectively drive the lifting and moving of the bottom mold 12 constituting the lower mold 1, and the left and right opening and closing movements of the two side molds 13.

[0129] The injection equipment includes a raw material tank and a grouting pump. A variety of different raw materials can be respectively arranged in different raw material tanks, and the pumping volume of different raw materials can be controlled through the grouting pump.

[0130] A method for manufacturing shoes using the shoe injection molding die according to any one of the above, specifically includes the following steps:

[0131] S101: Set the shoe upper 5 on the upper mold 2, and the lower mold 1 and the upper mold 2 are closed to form a molding cavity, and part of the section of the shoe upper 5 is located in the molding cavity; it can be connected to the shoe upper as a whole when the sole is molded.

[0132] Specifically, the shoe upper is set on the shoe last (upper mold 2), the two side molds 13 move closer to each other and abut against the shoe last, and the bottom mold 12 rises and abuts against the side molds 13 to form a molding cavity.

[0133] S102: Inject foaming material into the molding cavity through the injection channel 3.

[0134] S103: Vacuum the molding cavity through the air flow channel 4 to form a negative pressure environment, and the foaming material foams in the negative pressure environment to form a low-density sole 6.

[0135] When the foaming material is injected into the molding cavity, after the foaming reaction occurs, gas will be generated. At this time, the molding cavity is evacuated to timely discharge the generated gas, so as to improve the foaming rate and effect of the foaming material.

[0136] S104: After the foaming material is cured and integrally connected to the shoe upper 5, the mold is opened, and the sole 6 is trimmed.

[0137] Further, the foaming material includes polyol, isocyanate, foaming agent and hardener. Among them, the mass percentage of the foaming agent is 1% to 3% to enhance the foaming effect of the sole 6, and the mass percentage of the hardener is 1% to 5% to enhance the support performance of the sole 6.

[0138] Compared with the density of the sole made of conventional foaming materials in the related art being 0.4 - 0.5 g / cm 3 , the mold in the embodiment of the present invention can reduce the density of the produced sole to 0.1 - 0.4 g / cm 3 .

[0139] Preferably, by appropriately adjusting the ratio of the foaming material and optimizing the foaming rate, the density of the manufactured sole can reach 0.1-0.3 g / cm 3 . For example, by increasing the blowing agent, it can cooperate with the negative pressure environment to improve the foaming rate and foaming effect, thereby forming a low-density foaming material. For another example, by increasing the hardener, it can improve the support of the material on the premise of ensuring the low density of the foaming material.

[0140] In the related art, when other raw materials are the same, the mass percentage of the blowing agent is usually 0.2% to 0.6%, and the mass percentage of the hardener is usually 0.08% to 0.12%. The density of the manufactured sole is large, and it is impossible to further achieve lightweight through the change of materials and processes. In the embodiment of the present invention, the shoe injection molding die evacuates the negative pressure in the molding cavity, and correspondingly increases the amount of the blowing agent and the amount of the hardener, which can improve the foaming effect, reduce the density of the sole, increase the hardness of the sole by increasing the hardener, and ensure the foaming quality, avoiding quality defects such as air bubbles on the sole caused by untimely pumping of gas in the molding cavity, and also avoiding the decrease in hardness caused by the decrease in the density of the sole.

[0141] The polyol can be polyester polyol or polyether polyol, and the isocyanate can be methylene diphenyl diisocyanate (MDI); the blowing agent can be water, or existing compounds that act chemically or physically, and the hardener can be triethylenediamine.

[0142] Optionally, the mass percentage of the blowing agent is 1%, 1.2%, 1.5%, 1.77%, 2%, 2.32%, 2.7%, 2.83% or 3%, and the mass percentage of the hardener is 1%, 1.3%, 1.67%, 2.68%, 3.4%, 3.68%, 4%, 4.4% or 5%.

[0143] When the mass percentage of the blowing agent is less than 1%, the foaming effect of the foaming material is affected, and low-density foaming cannot be carried out in the molding cavity. When the mass percentage of the blowing agent is less than 3%, the foaming speed is too fast, affecting the vacuum pumping time, and the quality of the sole cannot be guaranteed.

[0144] When the mass percentage of the hardener is less than 1%, the sole is prone to be too soft to provide good support, affecting the wearing comfort and the quality of the product. When the mass percentage of the hardener is less than 5%, the hardness of the sole is prone to be too high, and it does not have good shock absorption effect, affecting the comfort of the product.

[0145] In some embodiments, the time for evacuating the molding cavity is H1, and the time for the foaming material to reach the air flow channel 4 from the injection channel 3 is H2. Then H1 is not greater than H2 to prevent the foaming material from being sucked into the air flow channel 4. The time for the foaming material to form a skin is H3, and H3 is not greater than H1 to ensure that the evacuated air can remove the gas generated during the foaming process of the foaming material.

[0146] In the embodiment of the present utility model, the orifice of the air flow channel 4 and the orifice of the injection channel 3 are arranged diagonally. Furthermore, the time for the foaming material to reach the air flow channel 4 from the injection channel 3 and the time for the foaming material to form a skin are used to determine the time for evacuating the molding cavity, optimizing the evacuation time, exhausting as much gas in the molding cavity as possible, and enabling the foaming material to foam with low density.

[0147] For example, if the orifice of the injection channel 3 is arranged at the heel part of the shoe, then the orifice of the air flow channel 4 is arranged at the toe part of the shoe. With such an arrangement, on the one hand, gas will be generated during the foaming process of the foaming material, and it is necessary to maintain evacuation for a certain period of time to ensure that the evacuated air can remove the gas generated by the material foaming. On the other hand, it takes a certain amount of time for the injected material to foam and form a skin on the surface, and evacuation needs to be continuously maintained during this process to ensure that the foaming material foams with low density under a negative pressure environment. The orifices of the air flow channel and the injection port are set as far apart as possible to prevent the distance between the two from being too close, where the evacuation stops before the foaming material has formed a skin, affecting the foaming effect, or during evacuation, the foaming material enters the orifice of the air flow channel, blocking the air flow channel.

[0148] The evacuation action is set according to the foaming and reaction time of the material and stops when the PU material forms a skin, generally stopping 20 - 70 s after injection molding.

[0149] In some embodiments, the air flow channel 4 is located on the upper mold 2. The shoe upper 5 includes a midsole cloth 51 at the bottom of the shoe upper 5. Through holes are formed in the midsole cloth 51, and the air flow channel 4 is aligned with the through holes to prevent the midsole cloth 51 from blocking the air flow channel 4. The negative pressure device sequentially extracts the gas in the molding cavity through the air flow channel 4 and the through holes.

[0150] That is to say, the midsole cloth is sewn to the bottom of the shoe upper, and the air flow channel 4 is arranged on the upper mold 2. When the air permeability of the midsole cloth is poor, through holes corresponding to the air flow channel 4 are formed in the midsole cloth, thereby preventing the midsole cloth from blocking the air flow channel.

[0151] When the midsole cloth is made of a material with good air permeability, through holes can be provided or not, and in both cases, smooth air flow can be ensured.

[0152] A support member is bonded to the bottom of the midsole cloth 51. The support member is located in the molding cavity, and the hardness of the support member is greater than the hardness of the sole 6 after foaming and molding. During the process of the foaming material curing and integrally connecting with the shoe upper 5, the support member is sealed in the sole 6.

[0153] By setting the support member, the support member can be integrally connected to the formed shoe sole. The support member can increase the support strength of the shoe sole, and while ensuring the performance of the shoe sole such as low density, light weight, and good shock absorption, it solves the problem of the shoe sole being too soft and improves the quality of the shoe.

[0154] As Figure 9 shown, the shoe of the embodiment of the present invention includes a shoe upper 5 and a shoe sole 6. The bottom of the shoe upper 5 has a midsole cloth 51; the shoe sole 6 is foam-molded by any of the above-mentioned shoe injection molding molds. When the shoe sole is molded, the shoe upper 5 and the midsole cloth 51 are sleeved on the upper mold of the shoe injection molding mold, and the molded shoe sole 6 is integrally connected to the shoe upper 5 and the midsole cloth 51.

[0155] The midsole cloth and the shoe upper can be connected together by sewing. The midsole cloth can better connect the shoe sole and the shoe upper, increase the fitting area between the shoe sole and the shoe upper, and improve the quality of the shoe.

[0156] In some embodiments, the shoe further includes a plurality of first support members 52, and the plurality of first support members 52 are respectively arranged at a plurality of stress points on the shoe sole 6 corresponding to the human foot.

[0157] Since there are a plurality of main stress points between the human foot and the shoe sole, by arranging the first support members at the corresponding stress points, the hardness of the corresponding position can be increased, and better support can be provided for the human foot.

[0158] In some embodiments, there are three first support members 52. The three first support members 52 are spaced apart on the shoe sole 6, and the three first support members 52 respectively correspond to the calcaneus, the first metatarsal bone, and the fifth metatarsal bone of the human foot, forming a triangular support on the human foot and enhancing the support of the entire shoe sole.

[0159] Furthermore, at least a part of the section of the first support member 52 is embedded in the shoe sole 6. The hardness of the first support member 52 is greater than that of the shoe sole 6. The first support member 52 is made of a material with low density and high hardness, providing sufficient support force without increasing the mass of the shoe.

[0160] Furthermore, the material of the first support member 52 is foam metal, and the density of the first support member 52 is 0.1 - 1 g / cm 3 . For example, the density of the first support member is 0.1 g / cm 3 , 0.3 g / cm 3 , 0.45 g / cm 3 , 0.62 g / cm 3 , 0.8 g / cm 3 , 0.93 g / cm 3 or 1 g / cm 3If the density of the first support member is too low, there are relatively few materials that can ensure its hardness, and the cost is relatively high. If the density of the first support member is too high, the total weight of the shoe will be too heavy.

[0161] In some embodiments, the shoe further includes a second support member 53. The second support member 53 is provided at the shoe waist of the sole 6 and can further enhance the support strength of the sole.

[0162] Among them, the hardness of the second support member 53 is greater than that of the sole, improving the support performance for the sole; at least a part of the second support member is embedded in the sole and can be integrally connected during molding.

[0163] Further, the material of the second support member 53 is a carbon fiber composite material, and the density of the second support member is 1 - 2 g / cm 3 For example, the density of the second support member is 1 g / cm 3 、1.3 g / cm 3 、1.45 g / cm 3 、1.62 g / cm 3 、1.8 g / cm 3 、1.93 g / cm 3 or 2 g / cm 3 .

[0164] In the embodiments of the present utility model, different materials are used for the first support member and the second support member, which can better play the role of the corresponding areas. On the premise of ensuring economic applicability, the overall quality and performance of the shoe can be more effectively improved, and a lightweight design can be achieved to improve the aesthetics of the shoe.

[0165] In some embodiments, the density of the sole 6 is 0.1 - 0.4 g / cm 3 , for example, the density of the sole 6 is 0.1 g / cm 3 、0.15 g / cm 3 、0.2 g / cm 3 、0.25 g / cm 3 、0.3 g / cm 3 、0.35 g / cm 3 or 0.4 g / cm 3 .

[0166] Compared with the density of the sole made of conventional foaming materials in the related art, which is 0.4 - 0.5 g / cm 3 , using the same material, through the mold and method in the embodiments of the present utility model, the density of the supported sole can be reduced to 0.1 - 0.4 g / cm 3 .

[0167] Preferably, by appropriately adjusting the proportion of the foaming material and using the foaming molding method for making shoes in any of the above embodiments, the foaming effect can be further optimized, and the density of the manufactured sole can reach 0.1-0.3 g / cm 3 .

[0168] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0169] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0170] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to", "fixed" and other terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0171] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0172] In the present utility model, terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0173] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present utility model.

Claims

1. A footwear injection molding die, characterized in that, Comprising: A lower mold, the lower mold having a first cavity; An upper mold, the upper mold abutting against the lower mold, at least part of a section of the upper mold being located in the first cavity to fill part of the space of the first cavity and enclose the first cavity, and the remaining space of the first cavity forming a sealed molding cavity; A material injection channel, the material injection channel being provided on the lower mold or the upper mold, the material injection channel communicating with the molding cavity to inject foaming material into the molding cavity, and the material injection channel being connected to a material injection device through a material injection assembly; An air flow channel, the air flow channel being provided on the lower mold or the upper mold, the air flow channel communicating with the molding cavity, and the air flow channel being connected to a negative pressure device through an air extraction assembly to evacuate the molding cavity to form a negative pressure.

2. The footwear injection molding die according to claim 1, characterized in that, The orifice of the material injection channel is located at one end of the molding cavity, and the orifice of the air flow channel is located at the other end of the molding cavity away from the orifice of the material injection channel.

3. The footwear injection molding die according to claim 2, wherein, The molding cavity has a first end and a second end, the first end corresponding to the heel part of the sole to be molded, and the second end corresponding to the toe part of the sole to be molded; The orifice of the material injection channel is located at one of the first end and the second end, and the orifice of the air flow channel is located at the other of the first end and the second end.

4. The footwear injection molding die according to claim 1, characterized in that, A filter element is provided in the air flow channel, the filter element being provided at one end of the air flow channel close to the molding cavity, and the filter element being used for ventilation and preventing the foaming material from entering the air flow channel; or The air flow channel includes a first section close to the molding cavity and a second section communicating with the first section, the first section including a plurality of capillary through holes provided on the upper mold or the lower mold, the capillary through holes communicating with the molding cavity and the second section, and the plurality of capillary through holes being used for ventilation and preventing the foaming material from entering the air flow channel.

5. The footwear injection molding die according to any one of claims 1 to 4, characterized in that, The lower mold includes a bottom mold and a plurality of side molds, the bottom mold and the plurality of side molds being capable of approaching and abutting against each other or moving away from each other, and the bottom mold and the plurality of side molds defining the first cavity; The bottom mold has a first surface, the first surface corresponding to the lower part of the sole to be molded, the plurality of side molds being arranged along the circumference of the bottom mold, and the side mold having a second surface, the second surface corresponding to the side part of the sole to be molded; The first surface, the plurality of second surfaces and the upper mold jointly define the molding cavity.

6. The footwear injection molding die according to claim 5, wherein, Both the material injection channel and the air flow channel are provided on the upper mold; Or, both the material injection channel and the air flow channel are provided on the bottom mold; Or, both the material injection channel and the air flow channel are provided on the side mold; Or, one of the material injection channel and the air flow channel is provided on the upper mold, and the other is provided on the side mold; Or, one of the material injection channel and the air flow channel is provided on the upper mold, and the other is provided on the bottom mold; Or, one of the material injection channel and the air flow channel is provided on the side mold, and the other is provided on the bottom mold.

7. The footwear injection molding die according to claim 5, wherein, The air flow channel is provided on the upper mold, the material injection channel is provided on the side mold, the air flow channel penetrates through the upper mold, one end of the air flow channel communicates with the molding cavity and is away from the material injection channel, the other end of the air flow channel is connected to the negative pressure device, the number of the side molds is two and they are abutted against each other, grooves are formed on the abutting surfaces of the two side molds, the openings of the two grooves are arranged oppositely and jointly define the material injection channel.

8. The footwear injection molding die according to claim 5, characterized in that, The air flow channel and the material injection channel are both provided on the side mold, the number of the side molds is two and they are abutted against each other, the air flow channel penetrates through one of the side molds, one end of the air flow channel communicates with the molding cavity and is away from the material injection channel, the other end of the air flow channel is connected to the negative pressure device, grooves are formed on the abutting surfaces of the two side molds, the openings of the two grooves are arranged oppositely and jointly define the material injection channel.

9. The footwear injection molding die according to claim 8, characterized in that, The two side molds are abutted against each other to form a first abutting surface corresponding to the heel part of the sole to be molded and a second abutting surface corresponding to the toe part of the sole to be molded, the material injection channel is arranged on one of the first abutting surface and the second abutting surface, the orifice of the air flow channel close to the molding cavity is arranged on the other of the first abutting surface and the second abutting surface, a recessed part is arranged on the abutting surface where the orifice of the air flow channel close to the molding cavity is located, the orifice of the air flow channel is located in the recessed part, and the recessed part communicates with the molding cavity to quickly extract the gas in the molding cavity.

10. The footwear injection molding die according to claim 5, wherein, A first sealing member is arranged between the bottom mold and the side mold, the first sealing member is a sealing gasket arranged on the upper surface of the bottom mold or the first sealing member is a sealing ring arranged along the circumferential direction of the side surface of the bottom mold to seal the gap between the bottom mold and the side mold; and / or A second sealing member is arranged between two adjacent side molds to seal the gap between two adjacent side molds; and / or A third sealing member is arranged between the upper mold and the side mold, the third sealing member is a sealing ring arranged along the circumferential direction of the upper mold, and the side mold abuts against the sealing ring of the upper mold during mold closing to seal the gap between the side mold and the upper mold; and / or The number of the side molds is two, and the two side molds are movable along the width direction of the molding cavity; and / or The bottom mold is movable along the thickness direction of the molding cavity; and / or The upper mold is a shoe last.

11. A shoe, characterized in that, Comprising: A sole, which is formed by using the shoe injection molding die according to any one of claims 1-10; An upper, the bottom of the upper has a midsole cloth, when the sole is being formed, the upper and the midsole cloth are sleeved on the upper mold of the shoe injection molding die, and the formed sole is integrally connected with the upper and the midsole cloth.

12. The shoe according to claim 11, characterized in that, It further includes a plurality of first support members, the plurality of first support members are respectively arranged at a plurality of stress points on the sole corresponding to the human foot, at least part of the section of the first support member is embedded in the sole, and the hardness of the first support member is greater than the hardness of the sole.

13. The shoe according to claim 12, wherein, The first support members are three in number, and the three first support members are arranged on the sole at intervals, and the three first support members respectively correspond to the calcaneus, the first metatarsal bone and the fifth metatarsal bone of the human foot; and / or The material of the first support member is foam metal; and / or The density of the first support member is 0.1-1 g / cm 3 .

14. The shoe according to claim 11, characterized in that, It further includes a second support member, the second support member is arranged at the shoe waist of the sole, at least part of the section of the second support member is embedded in the sole, and the hardness of the second support member is greater than that of the sole.

15. The shoe according to claim 14, characterized in that, The material of the second support member is carbon fiber composite material; and / or The density of the second support member is 1-2 g / cm 3 .

16. The shoe according to any one of claims 11-15, characterized in that, The density of the sole is 0.1 - 0.4 g / cm 3 .

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