A sealing forming mold for preparing a foamed shoe material preliminary blank

Abstract

The utility model discloses a kind of sealing forming mould for foamed shoe material preliminary blank preparation, including bottom die and the top die compatible with bottom die, bottom die is connected between top die by guide column, further include rectangular slot being opened in bottom die, rectangular slot is provided with sealing plate, top die is opened with sealing slot compatible with sealing plate, bottom die and top die are provided with driving member symmetrically on top die.The utility model is opened and closed linkage inclined guide column, inclined sliding slot, triangular sliding block and rolling wheel are mutually matched by top die, the opening and closing power of mould itself is converted into the lifting sealing action of sealing plate, without additional increase cylinder, oil cylinder and other external power source, structure layout is compact and simple, can realize mould closing synchronous sealing, mould opening synchronous unlocking, effectively block foaming raw material leakage, maintain the foaming pressure in mould cavity stably, avoid the defects such as material shortage, density uneven, profile deformation of shoe material preliminary blank, substantially improve product forming consistency and good product rate.

Description

Technical Field

[0001] This utility model relates to the field of shoemaking technology, and more specifically, to a sealed molding mold for preparing foamed shoe material preforms. Background Technology

[0002] In the preparation of foamed shoe material preforms, the sealing performance of the mold directly determines the molding quality and production efficiency of the product. The foaming reaction of the preform needs to be completed within a sealed mold cavity. If the seal is not tight, it can easily lead to leakage of the foaming material, unstable internal pressure, and consequently, problems such as material shortages at the product edges, uneven density, and surface defects. It also increases material waste and the workload of subsequent trimming processes, reducing overall production efficiency. Therefore, reliable mold sealing is one of the core technical requirements for the preparation of foamed shoe material preforms.

[0003] Currently, the sealing structure of molds used in the industry for preparing foamed shoe material blanks mainly adopts two methods: one is to rely on the pressure when the mold is closed to directly squeeze the sealing element, and the cavity is closed by the elastic deformation of the sealing element; the other is to set up an independent drive device (such as a cylinder or hydraulic cylinder) to control the extension and retraction of the sealing component to complete the sealing and unlocking actions.

[0004] However, existing sealing structures have significant shortcomings in practical applications: On the one hand, the sealing effect of relying on mold closing pressure for sealing depends mainly on the mold closing accuracy. After long-term use, the sealing components are prone to fatigue deformation due to repeated compression, leading to a gradual decrease in sealing reliability. Furthermore, it cannot adaptively adjust the sealing force according to pressure changes during the foaming process. On the other hand, sealing structures using independent drive devices require additional power sources, control systems, and pipelines, which not only increases the structural complexity and manufacturing cost of the mold but also suffers from poor drive synchronization. This can easily lead to delayed or jammed sealing components, resulting in a mismatch between the sealing timing and the mold closing action. This can cause component wear due to premature sealing or raw material leakage due to untimely sealing. In addition, the reset accuracy of independent drive structures is low, and misalignment of the seals can easily occur after multiple cycles, further affecting product consistency. Therefore, we urgently need a sealing molding die for the preparation of foamed shoe material preforms to solve the above problems. Utility Model Content

[0005] One objective of this invention is to provide a new technical solution for a sealing molding die used in the preparation of foamed shoe material blanks. The power conversion is achieved through the opening and closing linkage of the top mold with inclined guide pillars, triangular sliders and rolling wheels. The sealing plate can be driven to rise and fall precisely to achieve sealing without additional power, thereby stabilizing the cavity pressure, avoiding material shortage and deformation of the blank, and improving molding consistency and production efficiency.

[0006] According to a first aspect of the present invention, a sealing molding die for preparing a foamed shoe material preform is provided, comprising a bottom mold and a top mold adapted to the bottom mold, wherein the bottom mold and the top mold are connected by a guide post, and further comprising a rectangular groove formed on the bottom mold, wherein a sealing plate is provided in the rectangular groove, and a sealing groove adapted to the sealing plate is formed on the top mold, wherein driving members are symmetrically arranged on the bottom mold and the top mold, and the driving members are used to drive the sealing plate to extend and retract along the path of the rectangular groove;

[0007] The driving component includes symmetrical sliding grooves on the bottom mold, the sliding grooves are connected to rectangular grooves, a triangular slider is provided in the sliding groove, the triangular slider is slidably connected to the sliding protrusion on the sliding groove, the triangular slider is connected to the connecting block through a connecting post, and a guide rail adapted to the connecting block is symmetrically installed on the bottom mold, the connecting block is slidably connected to the guide rail;

[0008] Piston cylinders are symmetrically installed on the inner wall of the sliding groove. A support rod is slidably connected inside the piston cylinder. The end of the support rod is connected to the sealing plate. A spring is sleeved on the outer side of the piston cylinder. The two ends of the spring are respectively connected to the inner wall of the sliding groove and the sealing plate.

[0009] A support frame is fixedly connected to the bottom of the sealing plate, and a rolling wheel is rotatably connected to the support frame. The rolling wheel is in contact with the triangular slider. When the triangular slider moves, the rolling wheel moves along the inclined surface of the triangular slider. When the rolling wheel moves to the high section of the inclined surface, the sealing plate is in the sealing area. When the rolling wheel moves to the low section of the inclined surface, the sealing plate is in the waiting area.

[0010] The connecting block is provided with an inclined slide groove, and the top mold is symmetrically equipped with a connecting frame. An inclined guide post adapted to the inclined slide groove is fixedly connected to the connecting frame. The outer diameter of the inclined guide post is smaller than the inner diameter of the inclined slide groove. When in the sealing zone, the inclined guide post is in the inclined slide groove. When in the waiting zone, the inclined guide post is disengaged from the inclined slide groove.

[0011] Optionally, the sealing plate has a stepped groove, and the inner wall of the stepped groove is covered with a gasket for sealing. The sealing groove has a stepped protrusion integrally formed to match the stepped groove. When the stepped groove and the stepped protrusion on the sealing plate abut against each other, the gasket contacts the stepped protrusion and forms a sealing area.

[0012] Optionally, the connecting block is provided with a first inclined surface, and the connecting frame is provided with a second inclined surface that matches the first inclined surface. When in the sealing area, the first inclined surface and the second inclined surface are in contact, and when in the waiting area, the first inclined surface and the second inclined surface are disengaged.

[0013] Optionally, tension springs are symmetrically arranged on the guide rail, and the two ends of the tension springs are respectively connected to the connecting block and the guide rail to form a reset area.

[0014] 1. According to one embodiment of this disclosure, the sealing molding mold for preparing the foamed shoe material preform uses a top mold opening and closing linkage inclined guide post, inclined slide groove, triangular slider and rolling wheel to cooperate with each other, converting the opening and closing power of the mold itself into the lifting and sealing action of the sealing plate. There is no need to add external power sources such as cylinders and oil cylinders. The structure is compact and simple, and can realize synchronous sealing when closing the mold and synchronous unlocking when opening the mold. It can effectively block the leakage of foaming raw materials, stably maintain the foaming pressure in the mold cavity, avoid defects such as material shortage, uneven density and contour deformation in the shoe material preform, and greatly improve the product molding consistency and yield.

[0015] 2. According to one embodiment of this disclosure, the sealed molding mold for preparing the initial foamed shoe material blank forms a multi-directional guiding and limiting structure through guide rails, piston cylinders, and support rods. Combined with the automatic reset of the tension spring and the inclined surface fitting and locking design, it can ensure that each transmission component runs smoothly without deviation or jamming, greatly reducing transmission friction and rigid collision wear. It has high reset positioning accuracy and is not easily deformed or misaligned after long-term use. It can adapt to the continuous high-frequency cycle production conditions of foamed shoe materials. The equipment has a low failure rate, long service life, and convenient disassembly and maintenance in the later stage, effectively reducing production and maintenance costs.

[0016] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0018] Figure 1 This is a first-view overall structural schematic diagram of a sealing molding mold used for preparing a foamed shoe material preform in one embodiment;

[0019] Figure 2 This is a second-view overall structural schematic diagram of a sealing molding die used for preparing a foamed shoe material preform in one embodiment;

[0020] Figure 3 This is a first-view cross-sectional view of a sealing molding die used for preparing a foamed shoe material preform in one embodiment.

[0021] Figure 4 One embodiment is a sealed molding die for preparing a foamed shoe material preform. Figure 3 Enlarged structural diagram at point A in the middle;

[0022] Figure 5 This is a second-view cross-sectional structural diagram of a sealing molding die used for preparing a foamed shoe material preform in one embodiment;

[0023] Figure 6 One embodiment is a sealed molding die for preparing a foamed shoe material preform. Figure 5 Enlarged structural diagram at point B;

[0024] Figure 7 This is a third-view cross-sectional structural diagram of a sealing molding die used for preparing a foamed shoe material preform in one embodiment.

[0025] Figure 8 One embodiment is a sealed molding die for preparing a foamed shoe material preform. Figure 7 Enlarged structural diagram at point C.

[0026] The following are marked in the diagram: 1. Bottom mold; 2. Top mold; 3. Rectangular groove; 4. Sealing plate; 5. Sealing groove; 6. Stepped groove; 7. Gasket; 8. Stepped protrusion; 9. Sliding groove; 10. Triangular slider; 11. Connecting block; 12. Guide rail; 13. Piston cylinder; 14. Support rod; 15. Spring; 16. Support frame; 17. Rolling wheel; 18. Inclined slide; 19. Connecting frame; 20. Inclined guide post; 21. First inclined surface; 22. Second inclined surface; 23. Tension spring. Detailed Implementation

[0027] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0028] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0029] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0030] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0031] like Figure 1-8 As shown, a sealed molding mold for preparing a foamed shoe material preform includes a bottom mold 1 and a top mold 2 adapted to the bottom mold 1. The bottom mold 1 and the top mold 2 are connected by guide pillars.

[0032] In this embodiment, the bottom mold 1 and the top mold 2 are used as the main support body of the mold. The upper and lower split structure layout is adopted to adapt to the foam shoe material preform forming process. The guide column is used as a positioning guide component to limit the top mold 2 to only make vertical opening and closing displacement relative to the bottom mold 1, and provide a basic alignment reference for the whole mold.

[0033] Furthermore, the guide pillars ensure that the bottom mold 1 and the top mold 2 are in the same position each time they are closed, avoiding misalignment of the mold and causing cavity displacement. At the same time, they provide a stable installation foundation for the assembly and movement of all subsequent sealing components and transmission components.

[0034] Furthermore, the split-type joint structure of the bottom mold 1 and the top mold 2 has strong load-bearing capacity and stable structure, which can be adapted to the continuous high-frequency opening and closing production conditions of foamed shoe materials, and facilitates the modular layout and maintenance of various functional components in the later stage.

[0035] It should be noted that the guide column alignment structure that matches the bottom mold 1 and the top mold 2 is directly adopted from existing technology, and will not be elaborated on here.

[0036] It also includes a rectangular groove 3 formed on the bottom mold 1, a sealing plate 4 provided in the rectangular groove 3, a sealing groove 5 adapted to the sealing plate 4 formed on the top mold 2, a stepped groove 6 formed on the sealing plate 4, a gasket 7 for sealing covered on the inner wall of the stepped groove 6, and a stepped protrusion 8 adapted to the stepped groove 6 integrally formed in the sealing groove 5. When the stepped groove 6 and the stepped protrusion 8 on the sealing plate 4 abut against each other, the gasket 7 contacts the stepped protrusion 8 and forms a sealing area.

[0037] The sealed area refers to the working state where the mold is closed and the cavity is sealed, allowing for foaming operations. The waiting area refers to the standby state where the mold is open, the sealing plate 4 is reset, and the blank can be easily picked up and put in.

[0038] Here, the rectangular groove 3 on the bottom mold 1 provides installation space for the sealing plate 4 and constrains its vertical lifting and lowering trajectory. The sealing groove 5 on the top mold 2 is used to align and cooperate with the sealing plate 4 to form the basic structure for sealing the cavity edge.

[0039] Furthermore, the sealing plate 4 is provided with a stepped groove 6, and the sealing groove 5 is integrally formed with stepped protrusions 8. The sealing contact area is increased through the stepped interlocking fit. The gasket 7 covering the inner wall of the stepped groove 6 can achieve flexible fit and compensate for assembly and processing gaps.

[0040] Furthermore, the use of stepped grooves 6, gaskets 7, and stepped protrusions 8 to form a sealed area can effectively block leakage from the gaps in the foaming material, maintain stable foaming pressure inside the cavity, and prevent defects such as uneven density and material shortage deformation in the initial shoe material blank. At the same time, gaskets 7 can buffer rigid collisions and reduce wear and tear on sealing plates 4 and stepped protrusions 8.

[0041] A driving component is symmetrically arranged on the bottom mold 1 and the top mold 2. The driving component is used to drive the sealing plate 4 to move vertically up and down along the path of the rectangular groove 3. The driving component includes a sliding groove 9 symmetrically opened on the bottom mold 1. The sliding groove 9 is connected to the rectangular groove 3. A triangular slider 10 is arranged in the sliding groove 9. The triangular slider 10 is slidably connected to a sliding protrusion integrally formed on the inner side wall of the sliding groove 9 and extending along the length of the groove. The triangular slider 10 is fixedly connected to the connecting block 11 by a horizontally arranged connecting column. A guide rail 12 adapted to the connecting block 11 is symmetrically installed on the bottom mold 1. The connecting block 11 is slidably connected to the guide rail 12.

[0042] Here, the driving components are symmetrically arranged on the left and right sides of the bottom mold 1. The sliding groove 9 is opened inside the bottom mold 1 and is connected to the rectangular groove 3, providing the lateral horizontal sliding space and limiting boundary for the triangular slider 10, ensuring that the transmission layout is regular and symmetrical.

[0043] Furthermore, the triangular slider 10 is limited and slidably installed inside the sliding groove 9, and is fixedly connected to the connecting block 11 through the connecting column to form a linkage whole. The guide rail 12 is fixed on the bottom mold 1 and forms a linear sliding constraint on the connecting block 11, ensuring that the triangular slider 10 and the connecting block 11 slide horizontally synchronously without deviation.

[0044] Furthermore, the sliding groove 9, the triangular slider 10, the connecting block 11 and the guide rail 12 form a closed horizontal transmission guide structure. The symmetrical transmission on both sides makes the sealing plate 4 subjected to balanced force, avoiding unilateral drive skew and jamming. The structure has high integration, small space occupation, smooth and durable transmission, and can provide stable power transmission for the extension and retraction of the sealing plate 4.

[0045] Piston cylinders 13 are symmetrically installed on the inner wall of the sliding groove 9. A support rod 14 is slidably connected inside the piston cylinder 13. The end of the support rod 14 is connected to the sealing plate 4. A spring 15 is sleeved on the outer side of the piston cylinder 13. The two ends of the spring 15 are connected to the inner wall of the sliding groove 9 and the sealing plate 4, respectively.

[0046] Here, piston cylinders 13 are symmetrically fixed to the inner wall of the sliding groove 9, and support rods 14 can slide vertically along the inside of piston cylinders 13. The end of support rods 14 is connected to sealing plate 4, forming a vertical movement guide and limit for sealing plate 4.

[0047] Furthermore, the spring 15 is fitted on the outside of the piston cylinder 13, with its two ends connected to the inner wall of the sliding groove 9 and the sealing plate 4 respectively. It can move up and down with the sealing plate 4 to generate compression and tension deformation, forming an elastic pre-tightening support structure.

[0048] Furthermore, the piston cylinder 13 and the support rod 14 work together to prevent the sealing plate 4 from deflecting or tilting when it is raised or lowered. The spring 15 has both buffering and shock absorption and auxiliary reset functions, which reduces the rigid impact of the sealing plate 4 and reduces wear. At the same time, it can adaptively compensate for the assembly gap, and can still ensure the motion accuracy and smooth operation of the sealing plate 4 after long-term use.

[0049] A support frame 16 is fixedly connected to the bottom of the sealing plate 4. A rolling wheel 17 is rotatably connected to the support frame 16 via a rotating shaft. The outer circumferential surface of the rolling wheel 17 always maintains rolling contact with the inclined surface of the triangular slider 10. When the triangular slider 10 moves horizontally, the rolling wheel 17 rolls and moves along the inclined surface of the triangular slider 10. When the rolling wheel 17 moves to the highest position of the high section of the inclined surface, close to the side of the rectangular groove 3, the sealing plate 4 is in the sealing zone. When the rolling wheel 17 moves to the lowest position of the low section of the inclined surface, away from the side of the rectangular groove 3, the sealing plate 4 is in the waiting zone.

[0050] Here, the support frame 16 is fixed to the bottom of the sealing plate 4, providing a stable mounting base for the roller 17, which can rotate freely and always maintain contact with the inclined surface of the triangular slider 10.

[0051] Furthermore, by relying on the horizontal movement of the triangular slider 10, the rolling wheel 17 is driven to roll and switch between the high and low positions along its inclined surface, thereby controlling the sealing plate 4 to stop in the sealing area and the waiting area respectively, realizing the precise conversion from horizontal movement to vertical lifting and lowering movement.

[0052] Furthermore, the use of rolling wheel 17 for rolling contact instead of sliding friction significantly reduces the transmission resistance between triangular slider 10 and support frame 16, resulting in smooth and uninterrupted operation. Automatic positioning of the workstation is achieved by relying on the height of the inclined surface of triangular slider 10, eliminating the need for additional positioning components. The structure is simple and compact, accurately matching the opening and closing rhythm of the mold and adapting to automated continuous production.

[0053] The connecting block 11 has an inclined groove 18 that is inclined at an angle to the horizontal direction. The top mold 2 is symmetrically installed with a connecting frame 19. An inclined guide post 20 that matches the inclination angle of the inclined groove 18 is fixedly connected to the connecting frame 19. The outer diameter of the inclined guide post 20 is smaller than the inner diameter of the inclined groove 18 and a sliding gap is reserved. When the mold is in the sealing area, the inclined guide post 20 is completely in the inclined groove 18. When the mold is in the waiting area, the inclined guide post 20 is completely detached from the inclined groove 18.

[0054] Here, the connecting block 11 is provided with an inclined slide groove 18, and the top mold 2 is fixed with the inclined guide post 20 through the connecting frame 19. The inclined guide post 20 moves vertically and opens and closes synchronously with the top mold 2, forming an interlocking sliding fit structure with the inclined slide groove 18.

[0055] Furthermore, the outer diameter of the inclined guide post 20 is smaller than the inner diameter of the inclined slide groove 18, with a reasonable sliding fit clearance reserved to ensure that the inclined guide post 20 can be inserted into and removed from the inclined slide groove 18 smoothly without jamming, and to avoid motion interference caused by interference fit.

[0056] Furthermore, by utilizing the angled cooperation between the inclined guide post 20 and the inclined slide 18, the vertical opening and closing motion of the top mold 2 itself is directly converted into the horizontal sliding motion of the connecting block 11. There is no need to add additional power sources such as cylinders and oil cylinders, which simplifies the overall structure of the mold and reduces manufacturing costs. At the same time, the opening and closing of the mold and the sealing drive action are completely synchronized, and the linkage timing is precise and consistent.

[0057] The connecting block 11 has a first inclined surface 21, and the connecting frame 19 has a second inclined surface 22 that is completely matched with the inclination angle of the first inclined surface 21. When the mold is in the sealing area, the first inclined surface 21 and the second inclined surface 22 are completely in contact. When the mold is in the waiting area, the first inclined surface 21 and the second inclined surface 22 are separated from each other.

[0058] Here, the connecting block 11 is provided with a first inclined surface 21, and the connecting frame 19 is provided with a corresponding second inclined surface 22 with a matching inclination angle, forming an auxiliary limiting fit structure that can fit together and separate.

[0059] Furthermore, when the mold is closed and enters the sealing area, the first inclined surface 21 and the second inclined surface 22 are completely in contact, and the force is evenly distributed without local stress concentration; when the mold is opened to the waiting area, the two inclined surfaces separate smoothly without hindering the normal movement of each component.

[0060] Furthermore, after the first inclined surface 21 and the second inclined surface 22 are in contact, they can offset the lateral force generated by the transmission, and play an auxiliary locking and limiting role on the connecting block 11 and the inclined guide post 20, preventing the components from being slightly offset by force and causing misalignment of the seal, improving the working stability of the sealing area and the rigidity of the overall structure, and making it less prone to deformation and positioning deviation during long-term operation.

[0061] Tension springs 23 are symmetrically arranged on the guide rail 12. The two ends of the tension springs 23 are connected to the connecting block 11 and the guide rail 12 respectively to form a reset area.

[0062] Here, tension springs 23 are symmetrically arranged on the guide rail 12. The two ends of the tension springs 23 are fixed to the connecting block 11 and the guide rail 12 respectively, and a dedicated elastic reset area is constructed by relying on the elastic deformation of the tension springs 23.

[0063] Furthermore, the symmetrically arranged tension springs 23 can apply a balanced retraction force to the connecting blocks 11 on both sides, ensuring that the reset actions of the left and right transmission components are synchronized and the force is uniform, avoiding slippage and jamming caused by uneven tension on one side.

[0064] Furthermore, after mold opening, the spring 23 automatically drives the connecting block 11 and the triangular slider 10 to return to their original positions by relying on its own rebound force. No manual intervention or additional power drive is required. The reset response is fast, the repeatability is high, the structure is simple and easy to maintain, and it is suitable for high-frequency cyclic operation of molds, effectively improving the automation level and production efficiency of the equipment.

[0065] In this invention, during mold closing, the top mold 2 moves towards the bottom mold 1 along the guide post between the bottom mold 1 and the top mold 2, simultaneously driving the connecting frame 19 and the inclined guide post 20 downwards. The inclined guide post 20 is inserted into the inclined slide groove 18 of the connecting block 11. The outer diameter of the inclined guide post 20 is smaller than the inner diameter of the inclined slide groove 18 to ensure smooth sliding. The vertical motion is converted into the horizontal movement of the connecting block 11 along the guide rail 12 by the guide of the inclined slide groove 18. The tension spring 23 is stretched and stores energy. The connecting block 11 drives the triangular slider 10 to slide along the sliding protrusion of the sliding groove 9 towards the rectangular groove 3 through the connecting post. When the triangular slider 10 moves, its inclined surface rolls into contact with the rolling wheel 17 on the bottom support frame 16 of the sealing plate 4, pushing the rolling wheel 17 from the lower section of the inclined surface to the higher section, thereby driving the sealing plate 4 to extend upwards along the rectangular groove 3. As the piston cylinder 13 contracts, the support rod 14 inside slides synchronously, and the spring 15 is compressed to provide elastic support and buffer. When the rolling wheel 17 reaches the high section of the inclined surface, the sealing plate 4 enters the sealing area, and its stepped groove 6 abuts against the stepped protrusion 8 in the sealing groove 5 of the top mold 2. The gasket 7 and the stepped protrusion 8 are in close contact to form a sealed cavity. At the same time, the first inclined surface 21 of the connecting block 11 and the second inclined surface 22 of the connecting frame 19 are fitted and locked. After foaming, the top mold 2 opens, the inclined guide post 20 disengages from the inclined slide 18, the first inclined surface 21 and the second inclined surface 22 separate, the tension spring 23 releases its stored energy to pull the connecting block 11 and the triangular slider 10 to reset, the rolling wheel 17 falls back to the low section of the inclined surface, and the sealing plate 4 falls back to the waiting area along the rectangular groove 3 under the action of gravity and the reset elastic force of the spring 15, completing one complete cycle.

[0066] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A sealing forming mold for preparing a foamed shoe material preliminary blank, comprising a bottom mold (1) and a top mold (2) matched with the bottom mold (1), the bottom mold (1) and the top mold (2) being connected through a guide column, characterized in that: It also includes a rectangular groove (3) opened on the bottom mold (1), a sealing plate (4) is provided in the rectangular groove (3), a sealing groove (5) adapted to the sealing plate (4) is opened on the top mold (2), and driving components are symmetrically arranged on the bottom mold (1) and the top mold (2), and the driving components are used to drive the sealing plate (4) to extend and retract along the path of the rectangular groove (3); The driving component includes a sliding groove (9) symmetrically opened on the bottom mold (1), the sliding groove (9) is connected to the rectangular groove (3), a triangular slider (10) is provided in the sliding groove (9), the triangular slider (10) is slidably connected to the sliding protrusion on the sliding groove (9), the triangular slider (10) is connected to the connecting block (11) through the connecting column, and the bottom mold (1) is symmetrically installed with guide rails (12) adapted to the connecting block (11), the connecting block (11) is slidably connected to the guide rails (12); Piston cylinders (13) are symmetrically installed on the inner wall of the sliding groove (9). A support rod (14) is slidably connected inside the piston cylinder (13). The end of the support rod (14) is connected to the sealing plate (4). A spring (15) is sleeved on the outer side of the piston cylinder (13). The two ends of the spring (15) are connected to the inner wall of the sliding groove (9) and the sealing plate (4) respectively. The bottom of the sealing plate (4) is fixedly connected to a support frame (16), and a rolling wheel (17) is rotatably connected to the support frame (16). The rolling wheel (17) contacts the triangular slider (10). When the triangular slider (10) moves, the rolling wheel (17) moves along the inclined surface of the triangular slider (10). When the rolling wheel (17) moves to the high section of the inclined surface, the sealing plate (4) is in the sealing area. When the rolling wheel (17) moves to the low section of the inclined surface, the sealing plate (4) is in the waiting area. An inclined groove (18) is provided on the connecting block (11), and a connecting frame (19) is symmetrically installed on the top mold (2). An inclined guide post (20) adapted to the inclined groove (18) is fixedly connected on the connecting frame (19). The outer diameter of the inclined guide post (20) is smaller than the inner diameter of the inclined groove (18). When in the sealing area, the inclined guide post (20) is in the inclined groove (18). When in the waiting area, the inclined guide post (20) is disengaged from the inclined groove (18).

2. A sealed forming mold for preparing a foamed shoe material preform according to claim 1, characterized in that: The sealing plate (4) has a stepped groove (6) and a gasket (7) for sealing is wrapped on the inner wall of the stepped groove (6). The sealing groove (5) has a stepped protrusion (8) that matches the stepped groove (6). When the stepped groove (6) and the stepped protrusion (8) on the sealing plate (4) abut against each other, the gasket (7) contacts the stepped protrusion (8) and forms a sealing area.

3. A sealed forming mold for preparing a foamed shoe material preform according to claim 2, characterized in that: The connecting block (11) has a first inclined surface (21), and the connecting frame (19) has a second inclined surface (22) that matches the first inclined surface (21). When in the sealed area, the first inclined surface (21) and the second inclined surface (22) are in contact. When in the waiting area, the first inclined surface (21) and the second inclined surface (22) are separated.

4. A sealed forming mold for preparing a foamed shoe material preform according to claim 3, characterized in that: A tension spring (23) is symmetrically arranged on the guide rail (12). The two ends of the tension spring (23) are connected to the connecting block (11) and the guide rail (12) respectively to form a reset area.

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