Sole forming mold

Abstract

The utility model relates to a shoe sole forming die, which comprises a bottom die, an upper die and a lower die, a forming protrusion is arranged on the bottom face of the upper die, the upper die and the bottom die can move relatively so that the upper die can seal and cover the bottom die cavity, at least part of the forming protrusion can stretch into the bottom die cavity, at least one of the bottom die and the upper die is provided with a vacuumizing channel, and the first end of the vacuumizing channel leads to the external space; the second end of the vacuumizing channel is communicated with the bottom mold cavity; the first end of the vacuumizing channel is connected with a vacuumizing device through an air exhaust pipeline, and the vacuumizing device exhausts air in the bottom mold cavity through the vacuumizing channel so that a negative pressure environment can be formed in the bottom mold cavity. Therefore, the shoe sole forming mold has the advantages that the foaming effect of the foaming material can be improved, and the manufactured shoe sole is lighter.

Description

Technical Field

[0001] The utility model relates to the technical field of foam molding, and particularly relates to a sole molding die. Background Art

[0002] In the sole casting molding technology, the cast soles are often very heavy and not light enough. In the related art, it is more common to pour a foaming material into a mold or a cavity to make a low-density and lightweight sole. However, the density of the sole depends on the foaming degree of the casting material, and the fluidity of the casting material during the foaming reaction is also affected by the air pressure at each part in the mold cavity, resulting in problems such as pores, material shortage, foaming lines, and capillary pores on the surface of the foaming material after molding. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems in the related art to some extent. For this reason, an embodiment of the utility model provides a sole molding die.

[0004] The sole molding die according to the embodiment of the utility model includes:

[0005] A bottom die, the bottom die has a bottom mold cavity for molding a sole, and the opening of the bottom mold cavity faces upward;

[0006] An upper die, a molding protrusion is provided on the bottom surface of the upper die, the upper die and the bottom die can move relative to each other so that the upper die can cover the bottom mold cavity, at least part of the molding protrusion can extend into the bottom mold cavity, and a vacuum pumping channel is provided on at least one of the bottom die and the upper die. The first end of the vacuum pumping channel leads to the external space, and the second end of the vacuum pumping channel communicates with the bottom mold cavity;

[0007] The first end of the vacuum pumping channel is connected to a vacuum pumping device through a vacuum pumping pipeline, and the vacuum pumping device evacuates the bottom mold cavity through the vacuum pumping channel so as to form a negative pressure environment in the bottom mold cavity.

[0008] Therefore, the sole molding die according to the embodiment of the utility model has the advantage of increasing the foaming effect of the foaming material.

[0009] In some embodiments, the bottom die includes

[0010] A bottom die body, the bottom die body defines at least part of the bottom mold cavity;

[0011] The middle frame is disposed between the bottom die body and the upper die. The upper surface of the middle frame faces the upper die, and the lower surface of the middle frame faces the bottom die body. The forming protrusion passes through the middle frame and extends into the bottom die cavity. At least one of the middle frame and the upper die is provided with the vacuum pumping channel, and the second end of the vacuum pumping channel includes at least one hole.

[0012] In some embodiments, the vacuum pumping channel is formed in the middle frame;

[0013] The second end of the vacuum pumping channel is formed on at least one of the upper surface of the middle frame, the lower surface of the middle frame, and the inner side wall surface of the middle frame.

[0014] In some embodiments, the second end of the vacuum pumping channel is formed on the upper surface of the middle frame;

[0015] The hole at the second end includes at least one first hole;

[0016] There are a plurality of the first holes, and the plurality of first holes are evenly distributed on the upper surface of the middle frame. The first holes on the upper surface of the middle frame communicate with the bottom die cavity through the gap between the middle frame and the upper die;

[0017] And / or, a first groove is formed on the upper surface of the middle frame, at least one of the first holes is located in the first groove, a first notch communicating with the first groove is formed on the inner side wall surface of the middle frame, and the first notch communicates with the bottom die cavity.

[0018] In some embodiments, the second end of the vacuum pumping channel is formed on the lower surface of the middle frame;

[0019] The hole at the second end includes at least one second hole;

[0020] There are a plurality of the second holes, and the plurality of second holes are evenly distributed on the lower surface of the middle frame. The second holes on the lower surface of the middle frame communicate with the bottom die cavity through the gap between the middle frame and the bottom die body;

[0021] And / or, a second groove is formed on the lower surface of the middle frame, at least one of the second holes is located in the second groove, a second notch communicating with the second groove is formed on the inner side wall surface of the middle frame, and the second notch communicates with the bottom die cavity.

[0022] In some embodiments, the second end of the vacuum pumping channel is formed on the inner side wall surface of the middle frame;

[0023] The holes at the second end include a plurality of third holes formed on the inner wall surface of the middle frame.

[0024] In some embodiments, the holes at the second end are capillary micropores with a pore diameter less than or equal to a second preset value, and the holes are used to prevent the sole material from blocking the holes during the foaming and molding process of the sole;

[0025] Alternatively, a check valve is embedded in the holes at the second end, and the check valve allows air to pass through but not liquid to prevent the sole material from blocking the holes during the foaming and molding process of the sole.

[0026] In some embodiments, the upper mold and the bottom mold define a vacuum pumping cavity, and the bottom mold and the molding protrusion define an air extraction gap;

[0027] Alternatively, the upper mold has the vacuum pumping cavity and the air extraction gap;

[0028] The width of the air extraction gap is less than or equal to a first preset value;

[0029] The vacuum pumping channel, the vacuum pumping cavity, the air extraction gap, and the bottom mold cavity are sequentially connected.

[0030] In some embodiments, the bottom mold includes a bottom mold body and a middle frame. The bottom mold body defines at least part of the bottom mold cavity. The middle frame is disposed between the bottom mold body and the upper mold. The upper surface of the middle frame faces the upper mold, and the lower surface of the middle frame faces the bottom mold body;

[0031] One of the middle frame and the bottom mold body is provided with a mold closing protrusion. The mold closing protrusion is arranged around the circumference of the molding protrusion, and the gap between the mold closing protrusion and the molding protrusion forms the air extraction gap.

[0032] In some embodiments, the vacuum pumping channel is formed inside the molding protrusion;

[0033] The second end of the vacuum pumping channel is opened on the circumference of the molding protrusion, and / or the second end of the vacuum pumping channel is opened at the bottom of the molding protrusion.

[0034] In some embodiments, the vacuum pumping channel is in a pipe shape, or the vacuum pumping channel is a hollow structure formed by hollowing out at least one of the bottom mold and the upper mold.

[0035] In some embodiments, an annular sealing strip is disposed between the middle frame and the upper mold to seal the middle frame and the upper mold during mold closing. The sealing strip is located outside the holes at the second end, and the sealing strip is located on the upper surface of the middle frame or the lower surface of the upper mold;

[0036] And / or, an annular sealing strip is provided between the middle frame and the bottom mold body to seal the middle frame and the bottom mold body during mold clamping.

[0037] In some embodiments, a second vacuum pumping channel is formed in the bottom mold body. The air inlet of the second vacuum pumping channel leads to the external space, and the air extraction port of the second vacuum pumping channel is located on the bottom surface and / or the inner wall surface of the bottom mold body. A film paper is pressed between the middle frame and the bottom mold body. The second vacuum pumping channel is communicated with the space between the bottom mold body and the film paper. The film paper is adsorbed and adhered to the inner wall surface of the bottom mold body by pumping vacuum through the second vacuum pumping channel.

[0038] In some embodiments, the film paper is a TPU film;

[0039] The sole forming mold further includes a baking lamp, which is used to heat and soften the film paper to facilitate adsorbing and adhering the film paper to the inner wall surface of the bottom mold body to form a coated sole. Description of the Drawings

[0040] Figure 1 is a schematic structural diagram of a sole forming mold according to an embodiment of the present invention.

[0041] Figure 2 is an exploded view of a sole forming mold according to an embodiment of the present invention.

[0042] Figure 3 is a schematic diagram of a bottom mold body according to an embodiment of the present invention.

[0043] Figure 4 is a schematic diagram of a middle frame according to an embodiment of the present invention.

[0044] Figure 5 is a schematic diagram of an upper mold according to an embodiment of the present invention.

[0045] Figure 6 is a cross-sectional view of a sole forming mold according to an embodiment of the present invention.

[0046] Figure 7 is a cross-sectional view of a sole forming mold according to another embodiment of the present invention.

[0047] Figure 8 is a cross-sectional view of a sole forming mold according to still another embodiment of the present invention.

[0048] Reference Signs:

[0049] 1. Bottom mold;

[0050] 11. Bottom die body, 111. Bottom die cavity, 112. Die - closing protrusion, 113. Second vacuum - pumping channel, 1131. Air inlet, 1132. Air extraction port;

[0051] 12. Middle frame, 121. Vacuum - pumping channel, 1211. First end of the vacuum - pumping channel, 122. First hole, 123. First groove, 124. First notch;

[0052] 2. Upper die, 21. Forming protrusion, 22. Vacuum - pumping cavity, 23. Air extraction gap, 24. Hollow structure;

[0053] 3. Vacuum - pumping device;

[0054] 4. Sealing strip. Detailed implementation mode

[0055] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the 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.

[0056] The sole - forming mold according to the embodiments of the present utility model will be described below with reference to the drawings. As Figures 1 to 8 shown, the sole - forming mold according to the embodiments of the present utility model includes a bottom die 1 and an upper die 2.

[0057] The bottom die 1 has a bottom die cavity 111 for forming a sole, and the opening of the bottom die cavity 111 faces upward. A forming protrusion 21 is provided on the bottom surface of the upper die 2. The upper die 2 and the bottom die 1 can move relative to each other so that the upper die 2 can cover the bottom die cavity 111, and at least a part of the forming protrusion 21 can extend into the bottom die cavity 111. Specifically, the upper die 2 can move downward to cover the bottom die cavity 111, and the forming protrusion 21 and the bottom die cavity 111 define a foaming die cavity.

[0058] At least one of the bottom die 1 and the upper die 2 is provided with a vacuum - pumping channel 121. The first end 1211 of the vacuum - pumping channel 121 leads to the external space, and the second end of the vacuum - pumping channel 121 is communicated with the bottom die cavity 111. The first end 1211 of the vacuum - pumping channel 121 is connected to a vacuum - pumping device 3 through a vacuum - pumping pipeline. The vacuum - pumping device 3 pumps air from the bottom die cavity 111 through the vacuum - pumping channel 121 so as to form a negative - pressure environment in the bottom die cavity 111.

[0059] According to the sole molding die of the embodiment of the present utility model, foaming material is injected into the bottom mold cavity 111 of the sole molding die through a pouring device. The upper mold 2 moves towards the bottom mold 1 to achieve mold closing. The vacuum pumping device 3 can pump air from the bottom mold cavity 111 through the vacuum pumping channel 121, that is, pump air from the foaming mold cavity, so as to create a negative pressure environment in the foaming mold cavity. Furthermore, the foaming material can complete the foaming reaction in the negative pressure space. On the one hand, the foaming effect can be enhanced, the foaming material can fully foam in the negative pressure environment, and the density of the sole can be effectively reduced; on the other hand, foaming in the negative pressure environment can increase the foaming rate, reduce the processing time, and is beneficial to discharging the bubbles in the foaming material, avoiding the formation of pores on the surface of the sole and making the sole more beautiful.

[0060] Therefore, the sole molding die according to the embodiment of the present utility model has the advantage of increasing the foaming effect of the foaming material.

[0061] As Figures 1 to 8 shown, in some embodiments, the bottom mold 1 includes a bottom mold body 11 and a middle frame 12.

[0062] The bottom mold body 11 defines at least part of the bottom mold cavity 111. For example, the bottom mold body 11 defines the bottom mold cavity 111.

[0063] The middle frame 12 is arranged between the bottom mold body 11 and the upper mold 2. The upper surface of the middle frame 12 faces the upper mold 2, and the lower surface of the middle frame 12 faces the bottom mold body 11. The molding protrusion 21 passes through the middle frame 12 and extends into the bottom mold cavity 111. Specifically, when it is necessary to set the membrane paper, the membrane paper can be set between the bottom mold body 11 and the middle frame 12 to fix the membrane paper.

[0064] At least one of the middle frame 12 and the upper mold 2 is provided with a vacuum pumping channel 121. The second end of the vacuum pumping channel 121 includes at least one hole. For example, the second end of the vacuum pumping channel 121 includes a plurality of holes. Since the surface of the material has tension during the foaming and curing process of the foaming material, a plurality of holes are arranged at the end (the second end) of the vacuum pumping channel 121, and the aperture of the holes is small, so the foaming material is not easy to enter. Thus, it is convenient to pump air from the closed foaming mold cavity, and the probability of the foaming material blocking the vacuum pumping channel 121 can be reduced.

[0065] As Figure 2As shown, in some embodiments, a second vacuum channel 113 is provided in the bottom mold body 11. The air inlet 1131 of the second vacuum channel 113 leads to the external space, and the air extraction port 1132 of the second vacuum channel 113 is located on the bottom surface and / or the inner wall surface of the bottom mold body 11, that is, the air extraction port 1132 is provided on at least one of the bottom surface and the inner wall surface of the bottom mold body 11. A film paper is pressed between the middle frame 12 and the bottom mold body 11. The second vacuum channel 113 is communicated with the space between the bottom mold body 11 and the film paper. Vacuum is drawn through the second vacuum channel 113 to adsorb and bond the film paper to the inner wall surface and the bottom surface of the bottom mold body 11. Specifically, the molding protrusion 21 of the upper mold 2 and the upper surface of the film paper on the bottom mold body 11 define a closed foaming mold cavity, and the casting material can foam in the closed foaming mold cavity. For example, the film paper is a TPU (thermoplastic polyurethane) film. The vacuum device 3 includes a first vacuum pump and a second vacuum pump. The first vacuum pump is connected to the vacuum channel 121. The second vacuum pump is connected to the second vacuum channel 113. The second vacuum pump includes a negative pressure suction pipe and a negative pressure suction pump, and the negative pressure suction pump, the negative pressure suction pipe and the second vacuum channel 113 are connected in sequence.

[0066] In some embodiments, the sole molding mold further includes a baking lamp, which is used to heat and soften the film paper to facilitate adsorbing and bonding the film paper to the inner wall surface of the bottom mold body 11 to form a coated sole. By using the baking lamp to heat the film paper, the film paper is softened and elastic. The air between the film paper and the wall surface of the bottom mold cavity 111 is extracted by the vacuum device 3, so that the film paper is adsorbed on the inner wall surface of the bottom mold body 11 without wrinkles and damage.

[0067] In some embodiments, the holes at the second end are capillary micropores with a pore diameter less than or equal to a second preset value. The capillary micropores with the second preset value allow gas to pass through but do not allow the foaming material to pass through, and are used to prevent the sole material (foaming material) from blocking the holes during the sole foaming molding process.

[0068] In some embodiments, a check valve is embedded in the holes at the second end. The check valve allows air to pass through but does not allow liquid to pass through to prevent the sole material (foaming material) from blocking the holes during the sole foaming molding process. Specifically, the check valve can reduce the probability of the foaming material blocking the vacuum channel 121. The check valve (filter element) can be a filter membrane, a valve or a filter screen. For example, the filter element is a gas-liquid filter screen.

[0069] In some embodiments, a vacuum channel 121 is provided on the middle frame 12. The second end of the vacuum channel 121 is provided on at least one of the upper surface, the lower surface and the inner side wall surface of the middle frame 12.

[0070] As Figure 6As shown, in some embodiments, the second end of the vacuum pumping channel 121 is opened on the upper surface of the middle frame 12, and the holes at the second end include at least one first hole 122.

[0071] There are multiple first holes 122, and the multiple first holes 122 are evenly distributed on the upper surface of the middle frame 12. The first holes 122 on the upper surface of the middle frame 12 communicate with the bottom mold cavity 111 (vacuum pumping cavity 22) through the gap between the middle frame 12 and the upper mold 2; and / or, a first groove 123 is opened on the upper surface of the middle frame 12, at least one first hole 122 is located in the first groove 123, and a first notch 124 communicating with the first groove 123 is opened on the inner side wall surface of the middle frame 12, and the first notch 124 communicates with the bottom mold cavity 111 (vacuum pumping cavity 22). That is to say, multiple first holes 122 can be directly opened on the upper surface of the middle frame 12; or, a first groove 123 is opened on the upper surface of the middle frame 12, and the first holes 122 located in the first groove 123 communicate with the bottom mold cavity 111 (vacuum pumping cavity 22) through the first notch 124; or, multiple first holes 122 can be directly opened on the upper surface of the middle frame 12, and a first groove 123 is opened on the upper surface of the middle frame 12. For example, the flow cross-section of the first notch 124 increases in the direction away from the first groove 123.

[0072] In some embodiments, the second end of the vacuum pumping channel 121 is opened on the lower surface of the middle frame 12, and the holes at the second end include at least one second hole.

[0073] There are multiple second holes, and the multiple second holes are evenly distributed on the lower surface of the middle frame 12. The second holes on the lower surface of the middle frame 12 communicate with the bottom mold cavity 111 (vacuum pumping cavity 22) through the gap between the middle frame 12 and the bottom mold body 11; and / or, a second groove is opened on the lower surface of the middle frame 12, at least one second hole is located in the second groove, and a second notch communicating with the second groove is opened on the inner side wall surface of the middle frame 12, and the second notch communicates with the bottom mold cavity 111 (vacuum pumping cavity 22). That is to say, multiple second holes can be directly opened on the lower surface of the middle frame 12; or, a second groove is opened on the lower surface of the middle frame 12, and the second holes located in the second groove communicate with the vacuum pumping cavity 22 through the second notch; or, multiple second holes can be directly opened on the lower surface of the middle frame 12, and a second groove is opened on the lower surface of the middle frame 12.

[0074] In some embodiments, the second end of the vacuum pumping channel 121 is opened on the inner side wall surface of the middle frame 12. The holes at the second end include multiple third holes opened on the inner side wall surface of the middle frame 12.

[0075] As Figure 5As shown, in some embodiments, the vacuum cavity 22 is arranged around the molding protrusion 21. Specifically, the vacuum cavity 22 is located above the bottom mold cavity 111. The vacuum cavity 22 is annular, so that the vacuum channel 121 can easily evacuate the vacuum cavity 22.

[0076] like Figures 6 to 8 As shown, in some embodiments, the upper mold 2 and the bottom mold 1 define a vacuum cavity 22, and the bottom mold 1 and the molding protrusion 21 define a vacuum gap 23. Alternatively, the upper mold 2 has a vacuum cavity 22 and a vacuum gap 23. The width of the vacuum gap 23 is less than or equal to a first preset value, wherein the first preset value allows gas to pass through, but does not allow foaming material to pass through, thereby making it difficult for the foaming material to pass through the vacuum gap 23.

[0077] The vacuum channel 121, the vacuum cavity 22, the air evacuation gap 23 and the bottom mold cavity 111 (foaming mold cavity) are connected in sequence. Thus, the vacuum device 3 can use the vacuum channel 121 to evacuate the vacuum cavity 22, thereby forming a negative pressure in the vacuum cavity 22. The vacuum cavity 22, the air evacuation gap 23 and the bottom mold cavity 111 are connected in sequence, so that the gas in the bottom mold cavity 111 (foaming mold cavity) can pass into the vacuum cavity 22 through the air evacuation gap 23, and then enter the vacuum channel 121 to be extracted. It is difficult for the foaming material in the bottom mold cavity 111 (foaming mold cavity) to pass into the vacuum cavity 22 through the air evacuation gap 23.

[0078] In some embodiments, one of the bottom mold body 11 and the middle frame 12 is provided with a mold clamping protrusion 112, which is arranged around the molding protrusion 21, and the gap between the mold clamping protrusion 112 and the molding protrusion 21 constitutes an exhaust gap 23. Figure 7 As shown, the top of the inner wall surface of the bottom mold body 11 is provided with an annular mold closing protrusion 112, and the mold closing protrusion 112 abuts against the molding protrusion 21 to define the exhaust gap 23. Or, as Figure 8 As shown, the inner wall surface of the middle frame 12 is provided with an annular mold-closing protrusion 112 , and the mold-closing protrusion 112 abuts against the molding protrusion 21 to define an exhaust gap 23 .

[0079] like Figure 7 and Figure 8 As shown, in some embodiments, a vacuum channel 121 is provided inside the molding protrusion 21. The second end of the vacuum channel 121 is provided on the peripheral side of the molding protrusion 21, and / or, the second end of the vacuum channel 121 is provided on the bottom of the molding protrusion 21. In other words, the upper mold 2 is provided with a vacuum channel 121, and the second end of the vacuum channel 121 is provided on at least one of the peripheral side and the bottom of the molding protrusion 21.

[0080] like Figures 2 to 8As shown, in some embodiments, an annular sealing strip 4 is provided between the middle frame 12 and the upper mold 2 to seal the middle frame 12 and the upper mold 2 during mold closing. The sealing strip 4 is located outside the hole at the second end of the vacuum pumping channel. The sealing strip 4 is located on the upper surface of the middle frame 12 or the lower surface of the upper mold 2; and / or, an annular sealing strip 4 is provided between the middle frame 12 and the bottom mold body 11 to seal the middle frame 12 and the bottom mold body 11 during mold closing. That is to say, at least one of the middle frame 12 and the upper mold 2 and the middle frame 12 and the bottom mold body 11 is provided with the sealing strip 4, so that during mold closing, the airtightness of the bottom mold cavity 111 (foaming mold cavity) is relatively high, preventing the entire sole molding mold from leaking air and affecting the vacuum pumping effect. For example, the seal 4 is a sealing rubber band.

[0081] In some embodiments, the vacuum pumping channel 121 is in the shape of a pipe. The vacuum pumping channel 121 is in the shape of a slender pipe. Through the pipe, an external vacuum pumping device 3 pumps air from the bottom mold cavity 111 to form a negative pressure environment in the bottom mold cavity 111.

[0082] In some embodiments, the vacuum pumping channel 121 is a hollow structure 24 formed by hollowing out the upper mold 2; or, the vacuum pumping channel 121 is a hollow structure formed by hollowing out the middle frame 12; or, the vacuum pumping channel 121 is a hollow structure formed by hollowing out the bottom mold body 11. The external vacuum pumping device pumps air from the bottom mold cavity 111 through the hollow structure. At the same time, the external vacuum pumping device 3 can form a negative pressure area in the vacuum pumping channel 121. When the external vacuum pumping device 3 is closed, if gas is generated in the bottom mold cavity 111, the negative pressure area formed in the vacuum pumping channel 121 can suck the gas into the vacuum pumping channel 121.

[0083] 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, and 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 of the present invention.

[0084] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0085] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be construed 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 communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside 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 utility model can be understood according to specific circumstances.

[0086] In the present utility model, 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 in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" 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", "beneath" and "underneath" 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.

[0087] In the present utility model, terms such as "an embodiment", "some embodiments", "example", "specific example", 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 descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may 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.

[0088] Although the above embodiments have been shown and described, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Any changes, modifications, substitutions, and variations made by those of ordinary skill in the art to the above embodiments are within the protection scope of the present utility model.

Claims

1. A sole molding die, characterized in that, Comprising: A bottom mold, the bottom mold having a bottom mold cavity for molding a shoe sole, and the opening of the bottom mold cavity facing upward; An upper mold, a molding protrusion being provided on the bottom surface of the upper mold, the upper mold and the bottom mold being relatively movable so that the upper mold can cover the bottom mold cavity, at least part of the molding protrusion being capable of extending into the bottom mold cavity, and a vacuum pumping channel being provided on at least one of the bottom mold and the upper mold, a first end of the vacuum pumping channel leading to an external space, and a second end of the vacuum pumping channel communicating with the bottom mold cavity; The first end of the vacuum pumping channel is connected to a vacuum pumping device through a vacuum pumping pipeline, and the vacuum pumping device evacuates the bottom mold cavity through the vacuum pumping channel so as to form a negative pressure environment in the bottom mold cavity.

2. The sole forming mold according to claim 1, wherein, The bottom mold includes: A bottom mold body that defines at least part of the bottom mold cavity; A middle frame, the middle frame being disposed between the bottom mold body and the upper mold, an upper surface of the middle frame facing the upper mold, a lower surface of the middle frame facing the bottom mold body, the molding protrusion passing through the middle frame and extending into the bottom mold cavity, and the vacuum pumping channel being provided on at least one of the middle frame and the upper mold, and the second end of the vacuum pumping channel including at least one hole.

3. The shoe sole molding mold according to claim 2, wherein The middle frame is provided with the vacuum pumping channel; The second end of the vacuum pumping channel is provided on at least one of an upper surface of the middle frame, a lower surface of the middle frame, and an inner side wall surface of the middle frame.

4. The shoe sole molding mold according to claim 3, wherein The second end of the vacuum pumping channel is provided on the upper surface of the middle frame; The holes at the second end include at least one first hole; There are a plurality of the first holes, and the plurality of first holes are evenly distributed on the upper surface of the middle frame, and the first holes on the upper surface of the middle frame communicate with the bottom mold cavity through a gap between the middle frame and the upper mold; And / or, a first groove is provided on the upper surface of the middle frame, at least one of the first holes is located in the first groove, a first notch communicating with the first groove is provided on the inner side wall surface of the middle frame, and the first notch communicates with the bottom mold cavity.

5. The shoe sole molding mold according to claim 3, wherein The second end of the vacuum pumping channel is provided on the lower surface of the middle frame; The holes at the second end include at least one second hole; There are a plurality of the second holes, and the plurality of second holes are evenly distributed on the lower surface of the middle frame, and the second holes on the lower surface of the middle frame communicate with the bottom mold cavity through a gap between the middle frame and the bottom mold body; And / or, a second groove is provided on the lower surface of the middle frame, at least one of the second holes is located in the second groove, a second notch communicating with the second groove is provided on the inner side wall surface of the middle frame, and the second notch communicates with the bottom mold cavity.

6. The shoe sole molding mold according to claim 3, wherein The second end of the vacuum pumping channel is opened on the inner side wall surface of the middle frame; The holes at the second end include a plurality of third holes opened on the inner side wall surface of the middle frame.

7. The sole molding die according to any one of claims 4-6, characterized in that The holes at the second end are capillary micropores with a pore diameter less than or equal to a second preset value, and the holes are used to prevent the sole material from blocking the holes during the foaming and molding process of the sole; Alternatively, a check member is embedded in the holes at the second end, and the check member allows air to pass through but not liquid to prevent the sole material from blocking the holes during the foaming and molding process of the sole.

8. The sole molding die according to claim 1, characterized in that The upper die and the lower die define a vacuum pumping cavity, and the lower die and the molding protrusion define a pumping gap; Alternatively, the upper die has the vacuum pumping cavity and the pumping gap; The width of the pumping gap is less than or equal to a first preset value; The vacuum pumping channel, the vacuum pumping cavity, the pumping gap, and the bottom die cavity are sequentially communicated.

9. The sole molding die according to claim 8, characterized in that The lower die includes a lower die body and a middle frame. The lower die body defines at least part of the bottom die cavity. The middle frame is disposed between the lower die body and the upper die. The upper surface of the middle frame faces the upper die, and the lower surface of the middle frame faces the lower die body; A mold closing protrusion is provided on one of the middle frame and the lower die body. The mold closing protrusion is arranged around the periphery of the molding protrusion, and the gap between the mold closing protrusion and the molding protrusion forms the pumping gap.

10. The sole molding die according to claim 1, characterized in that The vacuum pumping channel is opened inside the molding protrusion; The second end of the vacuum pumping channel is opened on the periphery of the molding protrusion, and / or the second end of the vacuum pumping channel is opened at the bottom of the molding protrusion.

11. The sole molding die according to claim 1, characterized in that, The vacuum pumping channel is in a pipe shape, or the vacuum pumping channel is a hollow structure formed by hollowing out at least one of the lower die and the upper die.

12. The sole molding die according to claim 2, characterized in that An annular sealing strip is provided between the middle frame and the upper die to seal the middle frame and the upper die during mold closing. The sealing strip is located outside the holes at the second end, and the sealing strip is located on the upper surface of the middle frame or the lower surface of the upper die; And / or, an annular sealing strip is provided between the middle frame and the lower die body to seal the middle frame and the lower die body during mold closing.

13. The sole molding die according to claim 2, wherein A second vacuum pumping channel is opened in the lower die body. The air inlet of the second vacuum pumping channel leads to the external space. The air extraction port of the second vacuum pumping channel is located on the bottom surface and / or the inner wall surface of the lower die body. A membrane paper is pressed between the middle frame and the lower die body. The second vacuum pumping channel is communicated with the space between the lower die body and the membrane paper. The membrane paper is adsorbed and attached to the inner wall surface of the lower die body by pumping vacuum through the second vacuum pumping channel.

14. The sole forming mold according to claim 13, wherein the membrane paper is a TPU film; the sole forming mold further includes a baking lamp, and the baking lamp is used to heat and soften the membrane paper to facilitate adsorbing and attaching the membrane paper to the inner wall surface of the bottom mold body to form a coated sole.

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