Injection-molding envelope mold and apparatus for shoe soles

Abstract

This utility model discloses a shoe sole injection molding and coating mold and equipment, including a bottom mold, side molds, a shoe last, and an injection channel. The bottom mold includes an openable mold body and a pressure frame. The pressure frame abuts against the mold body circumferentially to press the film between the mold body and the pressure frame. The mold body is provided with a first airflow channel communicating with its inner cavity. The first airflow channel is used to draw gas between the film and the mold body so that the film adheres to the inner cavity wall of the mold body. The shoe last, bottom mold, and multiple side molds can approach and abut against each other or move away from each other. The shoe last, bottom mold, and multiple side molds approach and abut against each other to define the molding cavity. The injection channel is provided on the side mold or the shoe last and communicates with the molding cavity to inject foaming material into the molding cavity. The foaming material foams and solidifies in the molding cavity to form a shoe sole with a film. This utility model can reduce the foaming density of the injection molded shoe sole, making the shoe sole lighter, and at the same time, the film coating on the outer layer of the injection molded shoe sole improves the surface quality of the shoe sole.

Description

Technical Field

[0001] This utility model belongs to the field of shoe manufacturing technology, specifically relating to a shoe sole injection molding and coating mold and equipment. Background Technology

[0002] In the footwear industry, foamed materials are often injected into the sole cavity during the sole manufacturing process to form the sole. However, the foaming technology in this field uses the pressure generated by in-mold foaming to squeeze out the air in the mold cavity. As a result, the finished product will have more air holes on the sole surface due to the air venting problem. This leads to problems such as air holes, material shortages, foaming lines, and capillaries on the surface of the foamed material sole after molding, resulting in poor sole quality and appearance.

[0003] In addition, due to the high density of the soles made by foaming technology, the entire sole is heavy, making it difficult to meet the current demand for lightweighting in the footwear industry. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of this utility model propose a sole injection molding die that can reduce the foaming density of the sole and improve the surface quality of the sole.

[0006] An embodiment of this utility model proposes a shoe sole injection molding and coating equipment.

[0007] The shoe sole injection molding die of this utility model embodiment includes:

[0008] The bottom mold includes an openable and closable mold body and a pressure frame. The pressure frame abuts against the circumferential direction of the mold body to press the diaphragm between the mold body and the pressure frame. The mold body is provided with a first airflow channel communicating with its inner cavity. The first airflow channel is used to draw gas between the diaphragm and the mold body so that the diaphragm adheres to the inner wall surface of the mold body.

[0009] Side molds, wherein there are multiple side molds arranged circumferentially on the bottom mold;

[0010] The shoe last, the sole mold, and the plurality of side molds may be close to or far from each other, and the shoe last, the sole mold, and the plurality of side molds are close to each other to define a molding cavity;

[0011] The injection channel is located on the side mold or the shoe last. The injection channel is connected to the molding cavity to inject foaming material into the molding cavity. The foaming material foams and solidifies in the molding cavity to form a shoe sole with a film.

[0012] In this embodiment of the invention, a membrane is laid on the bottom mold, and air between the membrane and the bottom mold is drawn out through the first airflow channel, so that the membrane is tightly attached to the inner cavity of the bottom mold. The injection plastic is cured in the molding cavity to form the shoe sole, thereby forming a shoe sole with the membrane covering the outer surface. On the one hand, the membrane covers the shoe sole, preventing the pores, foam textures, etc. on the surface of the shoe sole from being visible. On the other hand, the dense structure of the membrane can form a protective layer, which is waterproof and oil-proof, and can further improve the surface quality of the shoe sole.

[0013] In some embodiments, one of the mold body and the pressing frame has an annular boss in the circumferential direction, and the other of the mold body and the pressing frame has a snap-fit ​​groove that matches the boss.

[0014] And / or, it further includes a first seal disposed circumferentially along one of the mold body and the pressure frame to improve the sealing performance of the diaphragm pressed between the mold body and the pressure frame.

[0015] In some embodiments, one end of the pressure frame is hinged to the mold body, and the other end of the pressure frame is detachably connected to the mold body;

[0016] One of the pressure frame and the mold body is provided with a column, and a ball bearing is elastically provided on the column. The other of the pressure frame and the mold body is provided with a slot corresponding to the ball bearing. The ball bearing is elastically engaged in the slot so that the pressure frame and the mold body can be detachably connected.

[0017] In some embodiments, the mold body of the bottom mold includes a first abutting portion, the circumferential area enclosed by the first abutting portion is smaller than the circumferential area enclosed by the tops of the plurality of side molds, and the shoe last abuts against the first abutting portion when the mold is closed so that the membrane covers the entire sole.

[0018] Alternatively, each of the side molds may include a second abutment portion, and the circumferential area enclosed by a plurality of second abutment portions is not greater than the circumferential area enclosed by the top of the bottom mold. The shoe last abuts against the second abutment portion when the mold is closed so that the membrane covers part of the sole.

[0019] The shoe sole injection molding and wrapping equipment of this utility model embodiment includes:

[0020] Control the machine;

[0021] As described in any of the above embodiments, the sole injection molding and wrapping mold, the bottom mold, the side mold, and the shoe last in the sole injection molding and wrapping mold are all connected to the control table, and the control table is used to control the bottom mold, the side mold, and the shoe last to approach and abut against each other or separate from each other;

[0022] A second airflow channel is provided on the side mold or the shoe last, and the second airflow channel is connected to the molding cavity to evacuate the molding cavity;

[0023] A vacuum pumping device is connected to the first airflow channel and the second airflow channel to evacuate the first airflow channel and the second airflow channel respectively;

[0024] A foaming material injection device is connected to the injection channel to inject foaming material into the molding cavity.

[0025] In some embodiments, the opening of the injection channel is located at one end of the molding cavity, and the opening of the second airflow channel is located at the other end of the molding cavity away from the opening of the injection channel.

[0026] In some embodiments, a filter element is provided in the second airflow channel. The filter element is located at one end of the second airflow channel near the molding cavity. The filter element is used to allow air to pass through and prevent the foaming material from entering the second airflow channel.

[0027] In some embodiments, the second airflow channel includes a first section near the molding cavity and a second section connected to the first section. The first section includes a plurality of capillary holes, which are located at one end of the first section near the molding cavity and connected to the molding cavity. The plurality of capillary holes are used to allow air to pass through and prevent the foaming material from entering the second airflow channel.

[0028] In some embodiments, a second seal is also provided between the bottom mold and the side mold, and / or between two adjacent side molds, and / or between the side mold and the shoe last.

[0029] In some embodiments, the vacuum suction force in the first airflow channel is greater than or equal to the vacuum suction force in the second airflow channel to prevent the diaphragm from being sucked up. Attached Figure Description

[0030] Figure 1 This is a three-dimensional schematic diagram of the shoe sole injection molding die according to an embodiment of the present invention.

[0031] Figure 2 This is a schematic diagram of the open state of the bottom mold in an embodiment of this utility model.

[0032] Figure 3 This is a cross-sectional schematic diagram of the closed state of the bottom mold in an embodiment of this utility model.

[0033] Figure 4 This is a cross-sectional schematic diagram of the shoe sole injection molding die according to an embodiment of the present invention.

[0034] Figure 5 This is a cross-sectional schematic diagram of a shoe sole injection molding die according to another embodiment of the present invention.

[0035] Figure 6 This is a cross-sectional schematic diagram of a shoe sole injection molding die according to another embodiment of the present invention.

[0036] Figure 7 This is a schematic diagram showing the connection between the shoe sole injection molding die, the vacuum device, and the foaming material injection device according to an embodiment of this utility model.

[0037] Figure label:

[0038] 100. Shoe sole injection molding and wrapping mold;

[0039] 1. Bottom mold; 11. Mold body; 111. First supporting part; 12. Pressure frame; 13. First airflow channel; 14. Boss; 15. Clip groove; 16. Column; 17. Ball bearing; 18. Slot; 19. First sealing element;

[0040] 2. Side mold; 21. Second abutment part;

[0041] 3. Shoe last;

[0042] 4. Injection channel;

[0043] 5. Second airflow channel; 51. Filter element;

[0044] 6. Molding cavity;

[0045] 7. Vacuum pumping device;

[0046] 8. Foaming material injection device. Detailed Implementation

[0047] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0048] like Figures 1-7 As shown, the shoe sole injection molding die 100 of this embodiment includes a bottom mold 1, side molds 2, a shoe last 3, and an injection channel 4. The shoe last 3, bottom mold 1, and multiple side molds 2 can be close to or far from each other. The shoe last 3, bottom mold 1, and multiple side molds 2 are close to each other to define a molding cavity 6. The structure of the molding cavity 6 matches the structure of the shoe sole. By injecting foaming material into the molding cavity 6, the foaming material foams and forms a shoe sole within the molding cavity 6. Of course, by fitting the shoe upper onto the shoe last 3, the molded shoe sole and shoe upper can be connected as one piece.

[0049] The bottom mold 1 includes an openable mold body 11 and a pressure frame 12. The pressure frame 12 and the mold body 11 can be opened or closed. The pressure frame 12 abuts against the mold body 11 circumferentially to position and press the diaphragm between the mold body 11 and the pressure frame 12. Before closing the mold, the pressure frame 12 and the mold body 11 are in the open state. The diaphragm is placed on the mold body 11. After the pressure frame 12 is fastened to the mold body 11, the diaphragm is pressed circumferentially between the pressure frame 12 and the mold body 11, thereby forming a sealed chamber between the diaphragm and the inner cavity of the mold body 11. The bottom of the inner cavity of the mold body 11 has a first airflow channel 13. After connecting the first airflow channel 13 to the vacuum device 7, the vacuum device 7 is activated, which can suck out the gas between the diaphragm and the inner cavity of the mold body 11, thereby forming a low-pressure space in the chamber between the mold body 11 and the diaphragm, so that the diaphragm is tightly attached to the inner wall of the mold body 11. When the foam material is formed in the molding cavity 6, the membrane can be connected to the foam material molded sole to form a sole with a membrane. On the one hand, the membrane covers the outer surface of the sole, preventing bubbles and foam patterns formed during the sole foaming process from being exposed. On the other hand, the membrane is made of wear-resistant and dense materials such as TPU, which can protect the sole, making it waterproof, oil-proof, and oxidation-proof, thereby meeting the appearance and performance requirements of the sole and improving the quality of the sole surface.

[0050] In this embodiment, there are multiple side molds 2, which are arranged around the bottom mold 1. For example, there are 2, 3 or 4 side molds 2. Preferably, there are two side molds 2, which are arranged along the width of the sole, that is, the left and right direction in the figure. When the mold is opened and closed, the two side molds 2 can move in the left and right direction.

[0051] In this embodiment, the injection channel 4 is located on the side mold 2 or the shoe last 3. The injection channel 4 is connected to the molding cavity 6 to inject foaming material into the molding cavity 6, which facilitates the injection of foaming material, improves the quality of the bottom of the shoe sole, and improves the stability of the connection structure between the film and the foamed shoe sole.

[0052] In this embodiment of the invention, a membrane is laid on the bottom mold 1, and the air between the membrane and the bottom mold 1 is drawn out through the first airflow channel 13, so that the membrane is tightly attached to the inner cavity of the bottom mold 1. The membrane is integrally formed on the sole, which can improve the surface quality of the sole.

[0053] The following describes some other embodiments of the present invention in detail with reference to the accompanying drawings.

[0054] like Figures 1-7 As shown, a shoe sole injection molding die 100 includes a bottom mold 1, a side mold 2, a shoe last 3, and an injection channel 4. The parts that are the same as those in the above embodiment will not be repeated. The differences are described in detail below.

[0055] In this embodiment, one end of the pressure frame 12 is hinged to the mold body 11, and the other end of the pressure frame 12 is detachably connected to the mold body 11. For example, a pivot is provided between one end of the pressure frame 12 and the mold body 11, so that the pressure frame 12 can open and close relative to the mold body 11. A latch is provided between the other end of the pressure frame 12 and the mold body 11. When the pressure frame 12 is fastened to the mold body 11, the latch connects the pressure frame 12 and the mold body 11 together to prevent them from loosening.

[0056] For example, see Figure 2 and Figure 3 One of the pressure frame 12 and the mold body 11 is provided with a column 16, and a ball bearing 17 is elastically provided on the column 16. The ball bearing 17 can move relative to the column 16. The other of the pressure frame 12 and the mold body 11 is provided with a slot 18 corresponding to the ball bearing 17. When the pressure frame 12 and the mold body 11 are fastened together, the ball bearing 17 can be elastically held in the slot 18. When it is necessary to open the pressure frame 12 and the mold body 11, the ball bearing 17 can be pushed out of the slot 18, thereby realizing the detachable connection between the pressure frame 12 and the mold body 11.

[0057] Among them, one of the mold body 11 and the pressure frame 12 of the bottom mold 1 has an annular boss 14 in the circumferential direction. The outline of the boss 14 is roughly the same as the outline of the shoe sole. The middle part of the boss 14 is an inner cavity that matches the segment of the shoe sole. The other of the mold body 11 and the pressure frame 12 has a fastening groove 15 that matches the boss 14. When the pressure frame 12 is fastened on the mold body 11, the fastening groove 15 and the boss 14 match, which can improve the positioning accuracy and avoid misalignment between the pressure frame 12 and the mold body 11.

[0058] Meanwhile, a first sealing element 19 can be provided on the boss 14 or in the groove 15. The first sealing element is arranged circumferentially along one of the mold body and the pressure frame to improve the sealing performance of the diaphragm pressed between the mold body and the pressure frame. The first sealing element 19 can be a rubber sealing ring. When the pressure frame 12 is fastened to the mold body 11, the sealing ring will undergo a certain elastic deformation, which can improve the contact effect and sealing performance between the pressure frame 12 and the mold body 11. When a vacuum is drawn through the first airflow channel 13, the diaphragm can be more tightly attached to the inner wall of the mold body 11, avoiding air gaps between the diaphragm and the inner wall of the mold body 11.

[0059] In some embodiments, see Figure 5 The mold body 11 of the bottom mold 1 includes a first abutting part 111. The circumferential area enclosed by the first abutting part 111 is smaller than the circumferential area enclosed by the tops of the multiple side molds 2. When the mold is closed, the shoe last 3 abuts against the first abutting part 111. At this time, the shoe sole is formed between the bottom of the shoe last 3 and the mold body 11. The diaphragm can cover the entire shoe sole, that is, the entire exposed area of ​​the shoe sole.

[0060] In some embodiments, see Figure 6 Each of the side molds 2 includes a second abutment 21. The circumferential area enclosed by the plurality of second abutment 21s is not greater than the circumferential area enclosed by the top of the bottom mold 1. When the mold is closed, the shoe last 3 abuts against the second abutment 21. At this time, the sole is formed between the shoe last 3, the side mold 2 and the bottom mold 1. The diaphragm only covers part of the sole. That is, the exposed part of the sole is divided into two parts. One part corresponds to the bottom mold and is covered by the diaphragm. The other part is located between the bottom mold and the shoe last. This part is not covered by the diaphragm.

[0061] This embodiment can achieve the production of different types of shoe soles by designing different detailed structures of the mold, thereby improving its practicality and aesthetics.

[0062] like Figures 1-7 As shown, the shoe sole injection molding and coating equipment of this utility model includes a control console, a shoe sole injection molding and coating mold 100 as in any of the above embodiments, a vacuum device 7, and a foaming material injection device 8.

[0063] The bottom mold 1, side mold 2, and shoe last 3 in the shoe sole injection molding and wrapping mold 100 are all connected to the control table. Specifically, the control table has multiple drive units, and the bottom mold 1, side mold 2, and shoe last 3 are connected to the multiple drive units one by one to control the independent movement of the corresponding bottom mold 1, side mold 2, and shoe last 3. Through the coordinated movement of the multiple drive units, the separation or close contact of the various components in the shoe sole injection molding and wrapping mold 100 can be achieved.

[0064] Optionally, the shoe sole injection molding and coating equipment has a control console and multiple sets of shoe sole injection molding and coating molds 100. The control console controls each shoe sole injection molding and coating mold 100 individually, thereby forming a mass production system.

[0065] A second airflow channel 5 is provided on the side mold 2 or the shoe last 3. The second airflow channel 5 is connected to the molding cavity 6 to evacuate the molding cavity.

[0066] The vacuum device 7 is connected to the first airflow channel 13 and the second airflow channel 5 to evacuate the first airflow channel 13 and the second airflow channel 5 respectively. By evacuating the first airflow channel 13, the gas between the diaphragm and the inner cavity of the mold body 11 can be sucked out, thereby making the diaphragm tightly adhere to the inner cavity wall of the mold body 11. By creating negative pressure in the molding cavity 6 through the second airflow channel 5, the injection molding plastic foams in a vacuum or negative pressure environment, which can improve the foaming speed and foaming effect of the foaming material in the molding cavity 6, and help the foaming material form a low-density shoe sole. At the same time, the gas generated during the foaming process can be extracted and discharged as soon as possible, avoiding the formation of pores on the surface of the shoe sole and avoiding affecting the appearance and quality of the shoe sole.

[0067] The vacuum suction force in the first airflow channel 13 and the vacuum suction force in the second airflow channel 5 can be adjusted separately without interference. It should be understood that the vacuum suction force in the first airflow channel 13 is greater than or equal to the vacuum suction force in the second airflow channel 5, which is necessary to ensure that the diaphragm is tightly attached to the inner wall of the mold body 11 and will not separate from the mold body 11 due to the vacuuming of the second airflow channel 5.

[0068] When there are multiple shoe sole injection molding and coating molds 100, multiple sets of shoe sole injection molding and coating molds 100 can share a vacuum device 7, be connected through different vacuum tubes, or be arranged one-to-one.

[0069] The foaming material injection device 8 is connected to the injection channel 4 and is used to inject foaming material into the molding cavity 6. When there are multiple shoe sole injection molding and coating molds 100, multiple sets of shoe sole injection molding and coating molds 100 can share a single foaming material injection device 8, connected through different injection pipes, or arranged one-to-one.

[0070] This invention addresses the problems of air pockets, material shortages, foaming lines, capillaries, and high density in shoe soles after molding, which are often found on the surface of foamed materials in related technologies. By vacuum-coating the inner surface of the mold, the surface of the shoe sole after injection molding is smooth and flat. Furthermore, by applying negative pressure suction within the molding cavity, the foamed material can complete the foaming reaction under negative pressure, resulting in a lower density sole. This is significantly lower than the 0.4 g / cm³ density of shoe soles in related technologies. 3 The above describes how the mold and method of this invention can achieve a shoe sole density of 0.1-0.3 g / cm³. 3 It has a low density, is lightweight, and is aesthetically pleasing.

[0071] Furthermore, in this embodiment, the opening of the injection channel 4 is located at one end of the molding cavity 6, and the opening of the second airflow channel 5 is located at the other end of the molding cavity 6 away from the opening of the injection channel 4. After the foaming material enters the molding cavity 6 through the injection channel 4, 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 vacuuming on the foaming and diffusion of the foaming material, and prevent the foaming material from entering and blocking the second airflow channel 5, this embodiment sets the injection channel 4 and the second airflow channel 5 at opposite ends of the molding cavity 6, so that the injection channel 4 and the second airflow channel 5 maintain a certain distance. When the foaming material is injected into the molding cavity 6, the gas generated during the foaming process can be discharged in time through the second airflow channel 5, and the foaming material can diffuse more quickly and reduce the density of the cured shoe sole.

[0072] For example, the molding cavity 6 has a first end and a second end, the first end corresponds to the heel of the sole to be molded, and the second end corresponds to the toe of the sole to be molded; the opening of the injection channel 4 is located at one of the first end and the second end, and the opening of the second airflow channel 5 is located at the other of the first end and the second end.

[0073] The foaming material injected through the injection channel 4 diffuses from the heel to the toe or from the toe to the heel, which helps the foaming material to flow evenly and also facilitates the continuous extraction of gas through the second airflow channel 5, thereby improving the foaming effect of the foaming material.

[0074] In this embodiment, the second airflow channel 5 is located on the shoe last 3, which can prevent protrusions or depressions from appearing on the molded shoe sole at the position corresponding to the second airflow channel 5, thereby improving the aesthetics of the shoe sole.

[0075] In this embodiment, the injection channel 4 can also be opened on the shoe last 3, or the injection channel 4 can be opened on the side mold 2. For example, arc grooves are provided on the opposite end faces of the two side molds 2. When the two side molds 2 are joined together, the two arc grooves form a complete injection channel 4. The design of the arc grooves facilitates the cleaning of the injection channel 4 after the side molds 2 are separated from each other, ensuring that the injection channel 4 is unobstructed, convenient for maintenance, and more practical.

[0076] In this embodiment, in order to prevent the foaming material from entering the second airflow channel 5 and causing blockage, a filter element 51 is provided in the second airflow channel 5. The filter element 51 is located at one end of the second airflow channel 5 near the molding cavity 6. The filter element 51 allows gas to pass through but does not allow the foaming material to enter the second airflow channel 5. The end face of the filter element 51 is flush with the surface of the shoe last 3.

[0077] Optionally, the filter element 51 is a metal part or a non-metal part such as ceramic. The filter element 51 is provided with multiple capillary pores. Since the surface of the foam material has tension during the foaming and curing process, the capillary pores can allow gas to pass through, but can block the foam material from entering the second airflow channel 5.

[0078] Alternatively, the structure of the second airflow channel 5 can be designed. Specifically, the second airflow channel 5 includes a first section near the molding cavity 6 and a second section connected to the first section. The first section includes multiple capillary holes opened on the shoe last 3. The capillary holes are connected to the molding cavity 6 and the second section. During the foaming and curing process of the foaming material, the surface of the material has tension. The multiple capillary holes allow gas to pass through, but can prevent the foaming material from entering the second airflow channel 5.

[0079] In this embodiment, a second sealing element is provided between the bottom mold 1 and the side mold 2, and / or between two adjacent side molds 2, and / or between the side mold 2 and the shoe last 3. The second sealing element can be a rubber sealing strip, sealing ring, rubber pad, TPU pad, etc. When the bottom mold 1, the side mold 2 and the shoe last 3 come close to each other, the second sealing element is deformed under pressure, which can improve the sealing performance of the molding cavity 6. When negative pressure is drawn into the molding cavity 6 through the second airflow channel 5, air can be prevented from flowing into the molding cavity 6 from the gap between adjacent molds, ensuring that the negative pressure parameters in the molding cavity 6 are stable and controllable, and improving the foaming effect of the shoe sole.

[0080] For example, a sealing gasket, which is a rubber gasket or a TPU gasket, is placed on the upper surface of the bottom mold 1. When the bottom mold 1 rises and abuts against the side mold 2, it abuts against the side mold 2 through the sealing gasket, thereby achieving a sealing effect.

[0081] For example, a sealing ring is embedded in the edge of the bottom mold 1, and the sealing ring abuts against the side mold 2 to achieve a sealing effect.

[0082] In the description of this utility model, it should be understood that 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., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0083] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0084] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0085] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0086] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A shoe sole injection overmolding mold characterized by, include: The bottom mold includes an openable and closable mold body and a pressure frame. The pressure frame abuts against the circumferential direction of the mold body to press the diaphragm between the mold body and the pressure frame. The mold body is provided with a first airflow channel communicating with its inner cavity. The first airflow channel is used to draw gas between the diaphragm and the mold body so that the diaphragm adheres to the inner wall surface of the mold body. Side molds, wherein there are multiple side molds arranged circumferentially on the bottom mold; The shoe last, the sole mold, and the plurality of side molds may be close to or far from each other, and the shoe last, the sole mold, and the plurality of side molds are close to each other to define a molding cavity; The injection channel is located on the side mold or the shoe last. The injection channel is connected to the molding cavity to inject foaming material into the molding cavity. The foaming material foams and solidifies in the molding cavity to form a shoe sole with a film.

2. The shoe sole injection overmolding mold of claim 1, wherein, One of the mold body and the pressing frame has an annular boss in the circumferential direction, and the other of the mold body and the pressing frame has a groove that matches the boss. And / or, it further includes a first seal disposed circumferentially along one of the mold body and the pressure frame to improve the sealing performance of the diaphragm pressed between the mold body and the pressure frame.

3. The shoe sole injection overmolding mold of claim 1, wherein, One end of the pressure frame is hinged to the mold body, and the other end of the pressure frame is detachably connected to the mold body; One of the pressure frame and the mold body is provided with a column, and a ball bearing is elastically provided on the column. The other of the pressure frame and the mold body is provided with a slot corresponding to the ball bearing. The ball bearing is elastically held in the slot so that the pressure frame and the mold body can be detachably connected.

4. The shoe sole injection overmolding mold of claim 1, wherein, The bottom mold body includes a first abutting part, the circumferential area enclosed by the first abutting part is smaller than the circumferential area enclosed by the tops of the multiple side molds, and the shoe last abuts against the first abutting part when the mold is closed so that the membrane covers the entire sole. Alternatively, each of the side molds may include a second abutment portion, and the circumferential area enclosed by a plurality of second abutment portions is not greater than the circumferential area enclosed by the top of the bottom mold. The shoe last abuts against the second abutment portion when the mold is closed so that the membrane covers part of the sole.

5. A shoe sole injection overmolding apparatus, characterized by, include: Control the machine; As described in any one of claims 1 to 4, the sole injection molding and wrapping mold, the bottom mold, the side mold, and the last in the sole injection molding and wrapping mold are all connected to the control table, and the control table is used to control the bottom mold, the side mold, and the last to approach and abut against each other or to separate from each other; A second airflow channel is provided on the side mold or the shoe last, and the second airflow channel is connected to the molding cavity to evacuate the molding cavity; A vacuum pumping device is connected to the first airflow channel and the second airflow channel to evacuate the first airflow channel and the second airflow channel respectively; A foaming material injection device is connected to the injection channel to inject foaming material into the molding cavity.

6. The shoe sole injection overmolding apparatus of claim 5, wherein, The opening of the injection channel is located at one end of the molding cavity, and the opening of the second airflow channel is located at the other end of the molding cavity, away from the opening of the injection channel.

7. The shoe sole injection overmolding apparatus of claim 5, wherein, A filter element is provided in the second airflow channel. The filter element is located at one end of the second airflow channel near the molding cavity. The filter element is used to allow air to pass through and prevent the foaming material from entering the second airflow channel.

8. The shoe sole injection overmolding apparatus of claim 5, wherein, The second airflow channel includes a first section near the molding cavity and a second section connected to the first section. The first section includes a plurality of capillary holes. The capillary holes are located at one end of the first section near the molding cavity and are connected to the molding cavity. The plurality of capillary holes are used to allow air to pass through and prevent the foaming material from entering the second airflow channel.

9. The shoe sole injection overmolding apparatus of claim 5, wherein, It also includes a second sealing element, which is provided between the bottom mold and the side mold, and / or between two adjacent side molds, and / or between the side mold and the shoe last.

10. The shoe sole injection overmolding apparatus of claim 5, wherein, The vacuum suction force in the first airflow channel is greater than or equal to the vacuum suction force in the second airflow channel to prevent the diaphragm from being sucked up.

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