Mold capable of pouring polyurethane outsole at bottom of midsole

Abstract

The utility model discloses a mold capable of pouring a polyurethane outsole at the bottom of a midsole. The mold comprises an upper mold, a lower mold and an inflatable air bag which are matched with each other, an outsole station is arranged at the top of the lower die, and limiting pieces used for limiting an insole are arranged on the outer side of the periphery of the outsole station; limiting barrier strips which protrude upwards are arranged on the peripheral edge of the outsole station, so that a glue injection chamber can be formed among the insole, the limiting barrier strips and the outsole station; a glue injection channel communicated to the glue injection cavity is formed in the lower mold, so that the outsole can be finally formed by injecting glue into the glue injection cavity; the air bag is installed at the bottom of the upper mold, and the bottom face of the air bag can be attached to the top face of the insole in a matched mode. According to the utility model, the outsole is poured after the insole is positioned, so that the step of positioning the outsole can be omitted in the pouring process, and finally, the fitting integrity and stability between the insole and the outsole of the poured sole can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of sole pouring technology, in particular to a mold that can pour polyurethane outsole on the bottom of the midsole. BACKGROUND

[0002] At present, the field of footwear and its forming process has developed very rapidly. The traditional sole is mainly formed by the midsole and the outsole which are respectively pre-formed, and then the two are bonded together after being brushed with processing agent for 1-2 times.

[0003] With the rapid development of materials and preparation technology, sports shoes have better functions. At present, many outsoles and midsoles in the general soles of sports shoes are made of EVA to provide better shock absorption and wearing comfort.

[0004] For the forming of the outsole and the midsole, application publication No. CN107696538A discloses a hot bonding method for thermoplastic polyurethane outsole and foamed thermoplastic polyurethane midsole, which specifically discloses the following steps: ①: thermoplastic polyurethane (TPU) material is injected into the outsole layer in an in-mold injection method; ②: a steam heating mold is provided, and the inner surface of the mold cavity is provided with steam injection holes; ③: the cooled thermoplastic polyurethane (TPU) outsole layer is placed at the bottom of the mold cavity of the steam heating mold, and foamed thermoplastic polyurethane (ETPU) granules are filled into the mold with the outsole layer as the bottom; ④: saturated water vapor is introduced into the mold through the steam injection holes to uniformly heat and pressurize the foamed thermoplastic polyurethane (ETPU) granules, so that the foamed thermoplastic polyurethane (ETPU) granules are hot-melted and bonded with the upper surface of the outsole layer to form the midsole layer of the sole; ⑤: after cooling the mold, the sole with the outsole layer and the midsole layer integrally formed is demolded.

[0005] In addition, application publication No. CN116638806A also discloses a preparation method of a sole, which specifically discloses the following steps: (1) heating the three-part mold with the outsole mold; (2) adding thermosetting polyurethane in the three-part mold with the outsole mold, setting the adhesive layer, and closing the mold; (3) after curing, opening the mold to obtain the outsole; (4) absorbing the film on the outsole, pouring the raw material of the midsole, closing the mold, and demolding after curing to obtain the sole.

[0006] For the above-mentioned hot thermoplastic polyurethane outsole and foaming thermoplastic polyurethane midsole hot bonding method and the preparation method of the shoe sole, they are first used to make the outsole, and then the outsole is fixed on the mold, and the midsole is poured into the mold. However, this production method also has some disadvantages, such as: in order to strengthen the friction and enhance the grip of some sports shoes, a plurality of lines are generally arranged on the bottom surface of the outsole, and there are grooves between adjacent lines, which form a complex anti-skid structure. Therefore, for the outsole with complex lines on the bottom surface, when the outsole is produced and positioned on the mold for pouring the midsole, a plurality of corresponding convex strips are also arranged on the mold to match the grooves, so that the convex strips can be inserted into the grooves when the outsole is installed, so that the outsole can be stably fixed, and displacement or edge lifting of the outsole during pouring process can be avoided. However, since the grooves on the outsole need to be manually matched and embedded with the convex strips on the mold one by one during installation of the outsole, this installation method is relatively troublesome and prone to misplacement. In addition, after the outsole is produced, due to thermal expansion and contraction and other reasons, the bottom of the outsole may also be slightly deformed. After the bottom of the outsole is slightly deformed, the grooves on the outsole and the convex strips on the mold cannot be matched and embedded one by one, so that the outsole cannot be stably fixed, and the midsole cannot be accurately poured on the outsole during subsequent pouring process, and the bonding integrity and stability between the midsole and the outsole are not good.

[0007] Therefore, it is necessary to improve the prior art. Practical new type content

[0008] In view of the problems existing in the prior art, the purpose of the present application is to provide a mold for pouring polyurethane outsole on the bottom of the midsole, which can pour the outsole after positioning the midsole by setting an injection chamber below the midsole, so as to avoid the step of positioning the outsole during pouring process, and the outsole will not be displaced during positioning. Finally, the bonding integrity and stability between the midsole and the outsole of the poured shoe sole can be guaranteed.

[0009] In order to achieve the above-mentioned purpose, the technical scheme of the present application is:

[0010] The mould can be used for pouring polyurethane outsole on the bottom of midsole, which comprises upper mould, lower mould and inflatable air bag; the outsole station is arranged on the top of the lower mould, and the limiting member for limiting the midsole is arranged on the outer side of the four sides of the outsole station; the limiting baffle which protrudes upward is arranged on the four sides of the outsole station, so that the limiting baffle can abut on the four sides of the bottom surface of the midsole after the midsole is installed, thereby forming the glue injection chamber between the midsole, the limiting baffle and the outsole station; the glue injection channel which communicates with the glue injection chamber is arranged on the lower mould, so that the glue injection chamber can be filled with glue and the outsole can be finally formed; the air bag is arranged on the bottom of the upper mould, and the bottom surface of the air bag can be matched with the top surface of the midsole, so as to press the midsole downward; the glue injection chamber is arranged below the midsole, so that the thermoplastic polyurethane outsole can be poured after the foaming polyurethane midsole is positioned, thereby avoiding the step of positioning the outsole during pouring, and finally ensuring the matching integrity and stability between the midsole and the outsole of the poured sole.

[0011] Further, the lower mould comprises the first mould and the second mould which are arranged in sequence and detachably connected; the outsole station is arranged on the top of the first mould; the glue injection channel comprises the first channel which penetrates from top to bottom to the bottom surface of the first mould, the second channel which is arranged between the first mould and the second mould and communicates with the first channel, and the third channel which penetrates from bottom to top to the glue injection chamber and communicates with the second channel. The first mould and the second mould which are arranged in sequence and detachably connected are convenient for production and cleaning of the glue injection channel, and avoid blockage of the channel.

[0012] Further, the protrusion is arranged on the top surface of the second mould, and the second channel is correspondingly arranged on the top surface of the protrusion; the recess is arranged on the bottom surface of the first mould for matching the protrusion, and the inlet of the third channel is arranged on the top surface of the recess. The first channel, the second channel and the third channel are connected in sequence through the above arrangement, thereby facilitating glue injection.

[0013] Further, the protrusion and the recess are in strip shape; the second channel is also in strip shape, and the extension direction of the second channel is the same as that of the protrusion and the recess; the outlet of the first channel communicates with one end of the second channel, and the inlet of the third channel communicates with the other end of the second channel. The above arrangement can ensure smooth flow of the material during pouring.

[0014] Further, the first mould and the second mould are detachably connected through bolts, thereby ensuring the efficiency and convenience of disassembly.

[0015] Further, the front and rear ends of the outsole station respectively extend upwards in an arc shape towards the outside of the two ends; the limiting member is provided with a plurality of limiting members distributed on both sides of the outsole station.

[0016] Further, an exhaust port for discharging internal air during glue injection is arranged at the front end of the glue injection chamber to ensure smoothness during glue injection.

[0017] Further, a plurality of convex and concave forming structures are arranged on the surface of the outsole station.

[0018] Further, the bottom surface pattern of the air bag matches the pattern on the top surface of the midsole.

[0019] The beneficial effects of the present application are:

[0020] (1) The present application can form a glue injection chamber by cooperating with the limiting baffle and the outsole station below the midsole, so that the outsole can be poured after the midsole is positioned, thereby eliminating the step of positioning the outsole during pouring, so that the outsole will not be displaced during positioning, and finally the adhesion and stability between the midsole and the outsole of the poured sole can be guaranteed, which is beneficial to improve the yield.

[0021] (2) The present application sets an air bag for pressing the midsole, so that the midsole can be pressed downward after the air bag is inflated, so that the midsole can maintain a downward movement trend and finally the outsole can be stably connected with the midsole during forming, and deformation is not easy to occur.

[0022] (3) The present application can conveniently clean the first channel, the second channel and the third channel by dividing the lower mold into the first mold and the second mold. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is the overall structure of the present application Figure 1 ;

[0024] Figure 2 is the overall structure of the present application Figure 2 ;

[0025] Figure 3 is the overall structure of the present application Figure 3 ;

[0026] Figure 4 is the explosion of the present application Figure 1 ;

[0027] Figure 2 is the explosion of the present application Figure 6 ;

[0028] Figure 7 is the bottom surface structure schematic view of the first mold of the utility model;

[0029] Figure 8 is the top structure schematic view of the second mold of the utility model;

[0030] Figures 1-8 is the local structure schematic view of the utility model.

[0031] Reference signs

[0032] 1, upper mold; 2, lower mold; 201, first mold; 2011, recessed position; 202, second mold; 2021, protrusion; 21, big bottom station; 22, limiting baffle; 23, glue injection channel; 231, first channel; 232, second channel; 233, third channel; 24, exhaust port; 25, limiting piece; 3, air bag; 4, midsole; 5, limiting frame. DETAILED DESCRIPTION

[0033] The utility model will be further described below in combination with the drawings and specific embodiments, the following description is only exemplary, and does not limit the protection scope of the utility model.

[0034] As Figures 3-8 Indicated, a method for pouring polyurethane big bottom at the bottom of midsole, comprising the following steps:

[0035] S1, the upper mold 1 of mold and lower mold 2 are heated;

[0036] S2, the produced foamed polyurethane midsole 4 is placed in the preset position of lower mold 2 and is positioned well;

[0037] S3, the upper mold 1 and lower mold 2 are closed, the air bag 3 is inflated so as to abut at the top of midsole 4 and let midsole 3 be pressed in the preset position of lower mold, and a glue injection chamber (not marked in the figure) is also formed correspondingly below midsole 4;

[0038] S4, the material of big bottom is injected into glue injection chamber;

[0039] S5, solidification;

[0040] S6, opening mold, the shoe sole that foamed polyurethane midsole 4 and thermoplastic polyurethane big bottom are connected well is obtained.

[0041] Specifically, in step S1, the temperature of heating is 50-70°C. In step S4, the time of injecting glue is 8-15 seconds, in this embodiment, in order to ensure the amount of injection, the time of injection can be specifically set to 10 seconds. In step S5, the time of curing is 680-750 seconds, in this embodiment, in order to ensure the curing effect, the time of curing can be specifically set to 700 seconds. Through the data set in each step, the desired sole can be ensured to be casted.

[0042] In step S1, the mold used in the above method specifically includes the upper mold 1, the lower mold 2 and the inflatable air bag 3 which cooperate with each other. The following will be discussed in detail:

[0043] As shown in Figures 3-8 , preferably, the top of the lower mold 2 is provided with a sole station 21, and the outer side of the four periphery of the sole station 21 is provided with a limiting piece 25 for limiting the position of the midsole 4, so that the midsole 4 can be stably installed at the preset position of the mold to ensure the positional accuracy of the midsole 4 during subsequent pouring.

[0044] As shown in Figure 2 , preferably, the four periphery edges of the sole station 21 are further provided with limiting stop strips 22 which protrude upward respectively, so that after the midsole 4 is installed, the limiting stop strips 22 can abut against the four periphery of the bottom surface of the midsole 4, thereby forming a glue injection chamber (not marked in the figure) between the midsole 4, the limiting stop strips 22 and the sole station 21. Of course, the shape and size of the glue injection chamber correspond to the shape and size of the desired molded sole, so as to ensure that the molded sole does not have appearance defects.

[0045] As shown in Figures 4-5 , specifically, the lower mold 2 is further provided with a glue injection channel 23 which communicates with the glue injection chamber, so that the glue can be injected into the glue injection chamber and the sole can be finally molded.

[0046] As shown in Figures 1-8 , for the structure of the air bag 3, the air bag 3 is installed at the bottom of the upper mold 1 and the bottom surface of the air bag 3 can be used to match and fit on the top surface of the midsole 4, so that after inflation is completed, the downward pressing of the midsole 4 can be formed, which can make the midsole 4 have a tendency to move downward and be pressed tightly on the lower mold 2, so that the stable connection between the sole and the midsole 4 during molding can be realized and deformation is not easy to occur. In addition, in this design, the air bag 3 is made of silica gel or rubber which has a certain softness, so that the air bag 3 can exert very uniform pressure on each position of the midsole 4 after inflation, so as to ensure the subsequent pouring effect of the sole and avoid the deformation of the midsole 4 which leads to the deformation of the sole, so that the fit degree of the sole and the midsole 4 can be ensured and the yield rate can be ensured.

[0047] As Figures 3-8 shown, preferably, the lower mold 2 comprises a first mold 201 and a second mold 202 which are arranged in a top-down manner and are detachably connected; the glue injection channel 23 comprises a first channel 231 which penetrates through the first mold 201 from top to bottom to the bottom surface of the first mold 201, a second channel 232 which is arranged between the first mold 201 and the second mold 202 and is in communication with the first channel 231, and a third channel 233 which penetrates through the glue injection chamber from bottom to top and is in communication with the second channel 232. By arranging the lower mold 2 into the first mold 201 and the second mold 202, the production of the lower mold 2 can be facilitated. In addition, since the second channel 232 is arranged between the first mold 201 and the second mold 202, the position of the second channel 232 can be cleaned conveniently after the first mold 201 and the second mold 202 are detached from each other, so that the subsequent pouring effect is not affected by the residual material in the position of the second channel 232. Of course, the detachable design of the first mold 201 and the second mold 202 is also conducive to the detailed cleaning of the first channel 231 and the third channel 233, because after the first mold 201 and the second mold 202 are detached, the internal conditions of the first channel 231 and the third channel 233 can be observed conveniently, and then the first channel 231 and the third channel 233 can be cleaned conveniently. Therefore, the detachable design of the first mold 201 and the second mold 202 can facilitate the production and cleaning of the glue injection channel 23, and avoid the blockage of the channel.

[0048] In addition, the utility model also provides a mold which can be used for pouring polyurethane outsole on the bottom of the midsole, which adopts the above-mentioned method which can be used for pouring polyurethane outsole on the bottom of the midsole, and specifically as follows:

[0049] The mold which can be used for pouring polyurethane outsole on the bottom of the midsole comprises a upper mold 1, a lower mold 2 and an inflatable air bag 3 which are matched with each other.

[0050] As Figures 3-8 shown, preferably, a outsole station 21 is arranged on the top of the lower mold 2, and a limiting piece 25 for limiting the midsole 4 is arranged on the outer side of the four periphery of the outsole station 21, so that the midsole 4 can be stably installed at the preset position of the mold, and the positional accuracy of the midsole 4 during the subsequent pouring is ensured.

[0051] As Figure 2 shown, preferably, a limiting baffle 22 which protrudes upward is arranged on the four periphery edges of the outsole station 21, so that after the midsole 4 is installed, the limiting baffle 22 can abut against the four periphery of the bottom surface of the midsole 4, and a glue injection chamber (not marked in the figure) is formed between the midsole 4, the limiting baffle 22 and the outsole station 21. Of course, the shape and size of the glue injection chamber correspond to the shape and size of the required molded outsole, so that the appearance of the molded outsole is not flawed.

[0052] As Figures 4-5 shown, specifically, an injection channel 23 is arranged on the lower mold 2 to communicate with the injection chamber, so that the outsole can be formed by injecting glue into the injection chamber.

[0053] As Figure 5 shown, for the structure of the air bag 3, the air bag 3 is arranged on the bottom of the upper mold 1, and the bottom surface of the air bag 3 can be used to match and fit on the top surface of the midsole 4, so that after inflation is completed, the downward pressing of the midsole 4 can be formed, so that the midsole 4 can keep the tendency of moving downward and can be pressed on the lower mold 2, and finally the outsole can be stably connected with the midsole 4 during the molding process, and deformation is not easy to occur. Similarly, according to the above elaboration, the arrangement of the air bag 3 can ensure the fit of the outsole and the midsole 4, and also ensure the yield.

[0054] Preferably, for the fixing mode of the air bag 3, a plurality of through holes uniformly distributed around can be arranged, and then bolts (not shown in the figure) for connecting with the upper mold 1 are arranged in each through hole, so that the air bag 3 can be arranged on the upper mold 1 by connecting the bolts with the upper mold 1. In addition, the inner cavity of the air bag 3 is open at the upper end, and an inflation port (not shown in the figure) for inflating the air bag 3 is arranged on the top surface of the upper mold 1, so as to facilitate the inflation of the air bag 3.

[0055] As Figures 1-8 shown, in order to make the air bag 3 mainly expand in the longitudinal direction when it expands, a limiting frame 5 arranged on the upper mold 1 can be sleeved around the air bag 3, so as to limit the expansion of the air bag 3 in the horizontal direction, so as to avoid that the air bag 3 cannot press the midsole 4 with enough force due to excessive expansion in the horizontal direction, that is, the above design can make the air bag 3 press the midsole 4 stably and with a certain force.

[0056] As Figure 2 shown, preferably, the lower mold 2 includes a first mold 201 and a second mold 202 arranged in an up-down manner and connected in a detachable manner; the outsole station 21 is located on the top of the first mold 201; the injection channel 23 includes a first channel 231 penetrating from the top to the bottom of the first mold 201, a second channel 232 arranged between the first mold 201 and the second mold 202 and communicating with the first channel 231, and a third channel 233 penetrating from the bottom to the top of the injection chamber and communicating with the second channel 232. Similarly, according to the above elaboration, the detachable first mold 201 and the second mold 202 are beneficial to facilitate production and cleaning of the injection channel 23, and avoid blockage of the channel.

[0057] As Figure 4 , Figure 6 and Figure 2As shown, preferably, a protrusion 2021 is arranged on the top surface of the second mold 202, and the second channel 232 is correspondingly arranged at the position of the top surface of the protrusion 2021; a recessed position 2011 for matching insertion of the protrusion 2021 is arranged on the bottom surface of the first mold 201, and the entrance of the third channel 233 is located on the top surface of the recessed position 2011. Thus, after the above arrangement, the first channel 231, the second channel 232 and the third channel 233 can realize continuous mutual communication, facilitating the realization of glue injection.

[0058] As shown in Figure 4 , Figure 6 and Figure 7 , in the embodiment, the protrusion 2021 and the recessed position 2011 are both in strip shape; the second channel 232 is also correspondingly in strip shape, and the extension direction of the second channel 232 is the same as that of the protrusion 2021 and the recessed position 2011; the outlet of the first channel 231 is connected to one end of the second channel 232, and the entrance of the third channel 233 is connected to the other end of the second channel 232. The strip-shaped protrusion 2021 can facilitate the second channel 232 to be correspondingly arranged in strip shape, so that the material can have a certain pre-storage space when entering the second channel 232 from the first channel 231, so that the material can flow very smoothly.

[0059] In the embodiment, the first mold 201 and the second mold 202 are detachably connected by bolts, so as to ensure the efficiency and convenience of disassembly.

[0060] As shown in Figure 8 and Figure 7 , preferably, in order to adapt to the shape of the bottom of the large sole, the front and rear ends of the large sole station 21 respectively extend upwards in an arc shape in the direction outward to the two ends; the limiting member 25 is provided with a plurality of limiting members distributed on both sides of the large sole station 21.

[0061] As shown in Figure 8 and Figure 4 , in the embodiment, the curvature of the front end of the large sole station 21 is greater than that of the rear end. However, those skilled in the art should know that for the two ends of the large sole station 21, he can also set the curvature according to the actual needs, which will not be described in detail here.

[0062] As shown in Figure 7 and Figure 7 , preferably, an exhaust port 24 for discharging internal air during the glue injection process is further arranged at the front end of the glue injection chamber, so as to ensure smoothness during the glue injection process.

[0063] As shown in ​As shown, preferably, a plurality of protrusions and a plurality of concaves are arranged on the surface of the outsole station 21, so that corresponding concave-convex structures can be formed on the bottom surface of the molded outsole, ensuring the anti-skid effect of the outsole bottom. In addition, in order to ensure that the air bag 3 can stably press the midsole 4, the bottom surface pattern of the air bag 3 can also be matched with the pattern on the top surface of the midsole 4.

[0064] In order to improve production efficiency, the outsole station 21 can be provided with two, and of course, the glue injection channel 23 and the limiting piece 25 and the like also need to be correspondingly provided with two sets to ensure the use effect.

[0065] In the embodiment, the hardness of the midsole 4 is less than the hardness of the outsole.

[0066] When the mold is used, first, the midsole 4 is placed between the limiting pieces 25 and the bottom surface is correspondingly abutted on the limiting baffle 22, at this time, the lower part of the midsole 4 forms a pouring cavity. Then, after the mold is closed, the air bag 3 is inflated and matchedly pressed on the top surface of the midsole 4, then glue is injected into the pouring cavity, and then the mold is opened after curing to obtain a sole including a foamed polyurethane midsole and a thermoplastic polyurethane outsole.

[0067] In summary, by cooperating the limiting baffle 22 and the outsole station 21 below the midsole 4, an injection cavity can be formed, so that the outsole can be poured after the positioning of the midsole 4, and then the positioning step of the outsole in the pouring process can be avoided, so that the outsole will not be shifted during positioning, and finally the adhesion integrity and stability between the midsole 4 and the outsole of the poured sole can be ensured, which is beneficial to improve the yield.

[0068] The utility model is not limited to the above-mentioned embodiment, if the various changes or deformation of the utility model do not deviate from the spirit and scope of the utility model, if these changes and deformation belong to the right claim and equivalent technical scope of the utility model, then the utility model also intends to include these changes and deformation.

Claims

1. A mold for pouring polyurethane outsole on the bottom of midsole, characterized in that: the mold for pouring polyurethane outsole on the bottom of midsole comprises a cooperating upper mold, lower mold and inflatable air bag; a bottom block is arranged on the top of the lower mold, and a limiting member for limiting the midsole is arranged outside the periphery of the bottom block; a limiting baffle is further arranged on the periphery of the bottom block to abut on the periphery of the top surface of the midsole after the midsole is installed, so as to form a pouring cavity between the midsole, the limiting baffle and the bottom block; a pouring channel is further arranged on the lower mold and communicated with the pouring cavity, so that the outsole can be formed by pouring glue into the pouring cavity; the air bag is arranged on the bottom of the upper mold and the bottom surface of the air bag is matched with the top surface of the midsole to press the midsole downward; the pouring cavity is arranged below the midsole, so that the thermoplastic polyurethane outsole can be poured after the foamed polyurethane midsole is positioned, the step of positioning the outsole is avoided during pouring, and the matching integrity and stability between the midsole and the outsole of the poured sole are ensured.

2. The mold for pouring polyurethane outsole on the bottom of midsole according to claim 1, characterized in that: the lower mold comprises a first mold and a second mold arranged in a top-bottom manner and detachably connected; the bottom block is arranged on the top of the first mold; the pouring channel comprises a first channel penetrating from top to bottom to the bottom surface of the first mold, a second channel arranged between the first mold and the second mold and communicated with the first channel, and a third channel penetrating from bottom to top to the pouring cavity and communicated with the second channel.

3. The mold for pouring polyurethane outsole on the bottom of midsole according to claim 2, characterized in that: a protrusion is arranged on the top surface of the second mold, and the second channel is correspondingly arranged at the top surface position of the protrusion; a recess is arranged on the bottom surface of the first mold for matching the protrusion, and the inlet of the third channel is arranged on the top surface of the recess.

4. The mold for pouring polyurethane outsole on the bottom of midsole according to claim 3, characterized in that: the protrusion and the recess are in strip shape; the second channel is also in strip shape, and the extending direction of the second channel is the same as that of the protrusion and the recess; the outlet of the first channel is communicated with one end of the second channel, and the inlet of the third channel is communicated with the other end of the second channel.

5. The mold for pouring polyurethane outsole on the bottom of midsole according to claim 2, characterized in that: the first mold and the second mold are detachably connected by bolts.

6. The mold for pouring polyurethane outsole on the bottom of midsole according to claim 1, characterized in that: the front and rear ends of the bottom block are respectively arc-shapedly extended upward in the direction outward to the two ends; and the limiting member is provided with a plurality of limiting members arranged on both sides of the bottom block. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 7. The mold for pouring polyurethane outsole on the bottom of midsole according to claim 6, wherein: An air outlet is arranged at the front end of the glue injection chamber for discharging the internal air during the glue injection.

8. The mold for pouring polyurethane outsole on the bottom of midsole according to claim 1, wherein: A plurality of convex and concave forming structures are arranged on the surface of the outsole station.

9. The mold for pouring polyurethane outsole on the bottom of midsole according to claim 1, wherein: The bottom surface pattern of the air bag matches the pattern on the top surface of the midsole.

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