Double-layer shoe sole forming mold and forming process thereof

Abstract

The invention is suitable for the technical field of shoe sole forming, and provides a double-layer shoe sole forming mold and a forming process thereof. The double-layer shoe sole forming mold comprises a lower base hinged with an upper base; the positioning block is fixedly arranged in the lower base; the lower die is arranged in the lower base, and the lower die is connected with the positioning block in a sliding mode; the base is fixedly installed at the bottom of the lower base, and the base is provided with a separation mechanism used for injecting gas between the shoe sole and the lower mold; and the air inlet is formed in the lower mold and corresponds to the separation mechanism. According to the double-layer shoe sole forming mold and the forming process thereof, the mold can be separated from the shoe sole, and the working efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of sole molding, and in particular relates to a double-layer sole molding die and a molding process thereof. Background Art

[0002] In the prior art, there are single-layer soles and double-layer soles. The injection mold for the single-layer sole only has a shoe last mold frame and a sole mold frame, and then the sole is cast and then closed. If a double-layer sole is to be cast, especially for two-color soles or soles of different materials, the sole is cast first, and then the cast sole and the shoe last are cast again to form a double-layer sole. The mold assembly of this structure must have a shoe last mold frame and a sole mold frame, and the sole mold frame must also be equipped with a sole mold cover. After the sole mold cover and the sole mold frame are made into the lower sole, the sole mold frame and the shoe last mold frame are closed to cast the midsole.

[0003] However, after the sole is cast, it is necessary to remove the formed sole from the mold. Since the sole fits tightly to the mold, forced demolding can easily cause edge tearing or surface scratches. Summary of the Invention

[0004] The present invention provides a double-layer sole forming mold and a forming process thereof, aiming to solve the problem raised in the above background art that the currently used forming mold fits tightly to the cast sole, making it difficult to remove the formed sole.

[0005] To solve the above problems, the present invention is implemented as follows: a double-layer sole forming mold, comprising: a lower base hinged to an upper base; a positioning block, the positioning block being fixedly installed in the lower base; a lower mold, the lower mold being arranged in the lower base, the lower mold being slidably connected to the positioning block; a base, the base being fixedly installed at the bottom of the lower base, the base being provided with a separation mechanism for injecting air between the sole and the lower mold; an air inlet, the air inlet being opened on the lower mold and being arranged corresponding to the separation mechanism.

[0006] Preferably, the separation mechanism includes an air intake pipe, a connecting port, a closing block, a first one-way valve and an inflation mechanism. The air intake pipe with the connecting port on the top is fixedly mounted on the base, and the connecting port is communicated with the air intake pipe. The closing block is fixedly mounted on the air intake pipe and is arranged on a side corresponding to the connecting port. The first one-way valve is arranged on the closing block for controlling the direction of airflow. The inflation mechanism is arranged in the air intake pipe for injecting outside air through the air intake into the sole and the lower mold to achieve separation.

[0007] Preferably, the communication port is configured to be in a bell-mouth shape, and the diameter of the communication port gradually decreases as the distance between the communication port and the air inlet gradually approaches.

[0008] Preferably, the inflation mechanism includes a piston, a second one-way valve, a vent, a push rod, an operating block and a balancing hole. The piston is sealingly and slidingly installed in the intake pipe. The second one-way valve is arranged on the piston. The vent is respectively arranged on the closing block and the piston. The push rod is fixedly installed on the piston and extends to the outside of the intake pipe. The operating block is fixedly installed on the push rod. The balancing hole is opened on the intake pipe and is arranged at an end corresponding to the push rod.

[0009] Preferably, the first one-way valve and the second one-way valve are correspondingly arranged and opened alternately by the movement of the piston to inject external air into the space between the lower mold and the sole.

[0010] Preferably, an annular block is fixedly installed in the communication port, and the annular block is used to prevent raw materials from entering the air inlet pipe.

[0011] Preferably, a guide rod is fixedly installed in the upper base, an upper mold with a movable groove is slidably connected to the guide rod, and the upper mold is arranged in the upper base.

[0012] Preferably, a threaded tube is fixedly mounted on the upper mold, the threaded tube slides through the upper base, a mounting frame is fixedly mounted on the upper base, an adjusting screw is rotatably mounted on the mounting frame, and the adjusting screw is threadedly connected to the threaded tube.

[0013] Preferably, the upper base and the upper mold are both provided with injection holes for injecting raw materials and exhaust holes for discharging gas, and the injection holes respectively provided on the upper base and the upper mold are connected, and the exhaust holes respectively provided on the upper base and the upper mold are connected.

[0014] The present invention also provides a double-layer sole forming process, comprising the following steps: S1: Open the upper base and select the appropriate lower mold and upper mold according to the required sole shape; The lower mold is provided with a notch corresponding to the positioning block. The lower mold is placed in the lower base and docked with the positioning block. The movable groove on the upper mold is slidably connected to the guide rod, and the threaded tube on the upper mold is passed through the upper base; S2: Rotate the adjusting screw so that the adjusting screw thread mounted on the mounting frame is embedded in the threaded tube. Since the guide rod is connected to the movable groove, the upper mold cannot rotate, and the position of the upper mold in the upper base is adjusted. At this time, the upper mold is fixed in the upper base. Cover the upper base, adjust the upper mold to a position where the distance between it and the lower mold is the thickness of the first layer of the sole by rotating the adjusting screw, inject the first layer of material into the space between the molds through the injection hole, and then exhaust through the exhaust hole; S3: After cooling and semi-forming, the adjusting screw is turned to move the upper mold upward, forming a cavity between the first layer material and the upper mold. The second layer material is injected through the injection hole to fill the cavity and then wait for molding; S4: After the sole is formed, the adjusting screw is turned to separate the upper mold from the sole. Since the lower mold has a large contact area with the sole and contains patterns, it is not easy to separate from the sole. The staff needs to use external force to remove the sole; Hold the operating block and pull the piston outwards through the push rod. The second one-way valve provided on the piston opens and connects with the balance hole and the vent provided on the piston, allowing external air to enter the intake pipe from the balance hole through the vent and the second one-way valve. Push the piston inward again. At this time, the second one-way valve is closed and the first one-way valve is opened. The gas passes through the vent provided on the closing block, enters the communicating port, and is injected into the space between the lower mold and the sole through the air inlet. The entry of the gas forms a gap between the lower mold and the sole. By repeatedly pushing and pulling the piston, air is continuously injected into the vent, thereby separating the lower mold from the sole. S5: After the lower mold is separated from the sole, the sole can be taken out directly, or the sole can be separated from the mold after the lower mold is taken out; The lower mold is reconnected to the lower base to prepare for the next sole production, and the above steps are repeated to realize the production of the sole.

[0015] Compared with related technologies, the double-layer sole forming mold and forming process provided by the present invention have the following beneficial effects: Compared with the existing technology, the double-layer sole forming mold and its forming process provided by this scheme realize the formation of an air cushion layer between the sole and the lower mold by air injection after the sole is cast and formed by setting a separation mechanism and rationally designing the mold structure, and use air pressure to assist demolding, effectively avoiding damage to the sole during demolding and improving the quality of the finished sole. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of a double-layer sole forming mold provided by the present invention; Figure 2 This is a schematic top view of the double-layer sole forming mold provided by the present invention; Figure 3 This is a schematic diagram of the main cross-sectional structure of a double-layer sole forming mold provided by the present invention; Figure 4 for Figure 3Schematic diagram of the enlarged structure of part A shown in FIG; Figure 5 for Figure 3 Schematic diagram of the enlarged structure of part B shown in FIG; Figure 6 for Figure 4 Schematic diagram of the enlarged structure of part C shown in FIG.

[0017] Figure markings: 1. lower base; 2. upper base; 3. positioning block; 4. lower mold; 5. base; 6. air inlet; 7. air inlet pipe; 8. connecting port; 9. closing block; 10. first one-way valve; 11. piston; 12. second one-way valve; 13. vent; 14. push rod; 15. operating block; 16. balancing hole; 17. annular block; 18. guide rod; 19. upper mold; 20. movable groove; 21. threaded tube; 22. mounting bracket; 23. adjusting screw. DETAILED DESCRIPTION

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein in the specification of the application are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the description of the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order; the terms "inside", "outside", "left", and "right" indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention.

[0019] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0020] The embodiment of the present invention provides a double-layer sole forming mold, such as Figure 1-6As shown, the double-layer sole forming mold includes: a lower base 1 hinged to an upper base 2; a positioning block 3, the positioning block 3 is fixedly installed in the lower base 1; a lower mold 4, the lower mold 4 is arranged in the lower base 1, and the lower mold 4 is slidably connected to the positioning block 3; a base 5, the base 5 is fixedly installed at the bottom of the lower base 1, and the base 5 is provided with a separation mechanism for injecting air between the sole and the lower mold 4; an air inlet 6, the air inlet 6 is opened on the lower mold 4, and is arranged corresponding to the separation mechanism.

[0021] In this embodiment, the lower base 1 is hinged to the upper base 2, providing a basic structure for the mold to open and close. The positioning block 3 is fixedly installed in the lower base 1, and the lower mold 4 is arranged in the lower base 1 and is slidably connected to the positioning block 3, ensuring the accuracy of the installation position of the lower mold 4 and a certain degree of mobility. The base 5 is fixedly installed at the bottom of the lower base 1, and the separation mechanism provided on it is correspondingly arranged to the air inlet 6 provided on the lower mold 4. After the sole is cast and formed, the separation mechanism is activated and air is injected into the space between the sole and the lower mold 4 through the air inlet 6. As the gas is injected, an air cushion layer gradually forms between the sole and the lower mold 4. Under the action of air pressure, the fit between the sole and the lower mold 4 is broken, allowing the sole to be easily separated from the lower mold 4. By providing the separation mechanism and the air inlet 6, an air cushion layer is formed between the sole and the lower mold 4 by air injection, and the air pressure is used to assist in demoulding, effectively avoiding damage to the sole during demoulding and improving the quality of the finished sole. The structural design of the hinged connection between the lower base 1 and the upper base 2, and the positioning sliding connection of the positioning block 3 to the lower mold 4 ensures the rationality and stability of the overall structure of the mold. While realizing the normal casting and molding function, it provides a reliable basic condition for the separation mechanism to play a demoulding role, so that the entire molding process can be carried out efficiently and stably.

[0022] In a further preferred embodiment of the present invention, the separation mechanism includes an air intake pipe 7, a connecting port 8, a closing block 9, a first one-way valve 10 and an inflation mechanism. The air intake pipe 7 with the connecting port 8 on the top is fixedly mounted on the base 5. The connecting port 8 is communicated with the air intake pipe 7. The closing block 9 is fixedly mounted on the air intake pipe 7 and is arranged on a side corresponding to the connecting port 8. The first one-way valve 10 is arranged on the closing block 9 for controlling the direction of airflow. The inflation mechanism is arranged in the air intake pipe 7 for injecting external air through the air intake 6 into the sole and the lower mold 4 to achieve separation.

[0023] In the present embodiment, by arranging the inflation mechanism in the separation mechanism, external air can be actively and accurately injected between the sole and the lower mold 4, quickly forming an air cushion layer and realizing efficient demoulding. Compared with the traditional forced demoulding method, the demoulding time is greatly shortened, the production efficiency is improved, and the production delay caused by the demoulding difficulty is avoided. The first one-way valve 10 is arranged on the closing block 9, which effectively controls the air flow direction, ensures that air can only enter between the sole and the lower mold 4 according to the specified direction, prevents air from flowing back or leaking, ensures the stability and reliability of the air injection process, and further improves the demoulding effect and the quality of the sole finished product. The various components of the separation mechanism are integrated on the base 5, with a compact structure and a reasonable layout. It does not take up too much extra space, and can give full play to the functions of each component, is compatible with the overall structure of the mold, and provides strong support for the smooth progress of the entire molding process.

[0024] In a further preferred embodiment of the present invention, the communication port 8 is configured to be in a bell-mouth shape, and the diameter of the communication port 8 gradually decreases as the distance between the communication port 8 and the air inlet 6 gradually approaches.

[0025] In this embodiment, the trumpet-shaped connecting port 8 is designed to play a converging role similar to a "funnel" during the air flow process. As the diameter gradually becomes smaller, the airflow is continuously compressed, the flow rate is accelerated, and the pressure is increased. The air can be injected between the sole and the lower mold 4 with a stronger force, quickly and fully forming an air cushion layer, effectively improving the efficiency and success rate of demoulding, and reducing demoulding failures caused by insufficient air injection or dispersion. The structure in which the diameter of the connecting port 8 gradually becomes smaller as the distance from the air inlet 6 approaches provides a clear guiding path for the airflow, ensuring that the air can flow smoothly to the air inlet 6 in a specific direction, avoiding problems such as turbulence, backflow or leakage of the air flow in the air inlet pipe 7, making the air injection process more precise and controllable, and ensuring the stable performance of the overall function of the separation mechanism. The trumpet-shaped setting can also prevent the sole raw material from entering the air inlet pipe 7 through the air inlet 6.

[0026] In a further preferred embodiment of the present invention, the inflation mechanism includes a piston 11, a second one-way valve 12, a vent 13, a push rod 14, an operating block 15 and a balancing hole 16. The piston 11 is sealingly and slidably installed in the intake pipe 7. The second one-way valve 12 is arranged on the piston 11. The vent 13 is respectively arranged on the closing block 9 and the piston 11. The push rod 14 is fixedly mounted on the piston 11 and extends to the outside of the intake pipe 7. The operating block 15 is fixedly mounted on the push rod 14. The balancing hole 16 is opened on the intake pipe 7 and is arranged at an end corresponding to the push rod 14.

[0027] In this embodiment, the piston 11 is driven to reciprocate in the air inlet pipe 7 by the operating block 15 and the push rod 14, and the design of the second one-way valve 12 and the air vent 13 is combined to achieve an active and efficient inflation process. Compared with the traditional passive inflation method, the inflation mechanism can inject air between the sole and the lower mold 4 more quickly and accurately, effectively shortening the demoulding time and improving production efficiency. The setting of the second one-way valve 12 strictly controls the direction of the airflow, ensuring that the outside air can only enter the air inlet pipe 7 according to the set path, and is injected into the target area through the air inlet 6 under the compression action of the piston 11, preventing air backflow or leakage, ensuring the stability and reliability of the inflation process, and enabling a stable air cushion layer to be formed between the sole and the lower mold 4, and successfully completing the demoulding operation. The opening of the balance hole 16 effectively balances the air pressure inside the intake pipe 7 and the outside air pressure, avoiding the sudden change of the air pressure inside the intake pipe 7 due to the movement of the piston 11, which affects the normal sliding of the piston 11, ensuring the smooth operation of all components of the inflation mechanism, extending the service life of the mold, and also improving the stability and controllability of the entire molding process.

[0028] In a further preferred embodiment of the present invention, the first one-way valve 10 and the second one-way valve 12 are correspondingly arranged and opened alternately by the movement of the piston 11 to inject external air into the space between the lower mold 4 and the sole.

[0029] In the present embodiment, the first one-way valve 10 and the second one-way valve 12 are correspondingly arranged and opened alternately, ensuring that the outside air can be accurately and efficiently injected between the lower mold 4 and the sole according to the preset path. During the reciprocating motion of the piston 11, one one-way valve is always kept open to guide the air flow to the target area, and the other one-way valve is closed to prevent air backflow, thereby avoiding the turbulence of the air flow and the waste of energy, and being able to quickly form a stable air cushion layer, significantly improving the demoulding efficiency. Through the alternating operation of the two one-way valves, the direction of the air flow is strictly limited, effectively preventing the backflow of air in the air inlet pipe 7 and between the lower mold 4 and the sole. This not only ensures the stability and reliability of the air injection process, but also avoids the internal contamination of the mold or abnormal air pressure caused by air backflow, thereby ensuring the quality of the sole molding.

[0030] In a further preferred embodiment of the present invention, an annular block 17 is fixedly installed in the communication port 8 , and the annular block 17 is used to prevent the raw material from entering the air inlet pipe 7 .

[0031] In this embodiment, the provision of the annular block 17 effectively prevents the sole raw material from entering the air intake pipe 7, and avoids the raw material from solidifying or remaining in the air intake pipe 7, thereby protecting the piston 11, the second one-way valve 12 and other components in the inflation mechanism. If the raw material enters the air intake pipe 7, it may cause problems such as obstruction of the movement of the piston 11 and failure of the sealing of the second one-way valve 12, affecting the normal function of the inflation mechanism. The annular block 17 eliminates such risks at the source, extending the service life of the inflation mechanism and the entire mold. Although the annular block 17 has a blocking effect on the raw material, it does not completely close the connecting port 8, but retains an effective channel for air circulation. During demoulding, air can smoothly pass through the position of the annular block 17 and be injected between the lower mold 4 and the sole through the air inlet 6, ensuring that the air injection process is not hindered, stably forming an air cushion layer, achieving efficient demoulding, and ensuring the continuity and stability of the mold forming process.

[0032] In a further preferred embodiment of the present invention, a guide rod 18 is fixedly installed in the upper base 2 , and an upper mold 19 with a movable groove 20 is slidably connected to the guide rod 18 , and the upper mold 19 is arranged in the upper base 2 .

[0033] In the present embodiment, the sliding connection between the guide rod 18 and the movable groove 20 on the upper mold 19 provides an accurate guiding effect for the up and down movement of the upper mold 19. During the mold closing process, it is ensured that the upper mold 19 can dock with the lower mold 4 accurately to form a molding chamber with accurate position and good sealing, thereby avoiding the problems of sole dimensional error, uneven thickness or molding defects caused by mold closing deviation, and significantly improving the molding accuracy and quality of the sole. This structural design of the upper mold 19 and the upper base 2 enables the upper mold 19 to flexibly respond to the force of the external driving device and achieve fast and accurate up and down movement. During the production process, the moving speed and position of the upper mold 19 can be flexibly adjusted according to different process requirements to meet the diverse sole molding needs and enhance the versatility and adaptability of the mold.

[0034] In a further preferred embodiment of the present invention, a threaded tube 21 is fixedly mounted on the upper mold 19, and the threaded tube 21 slides through the upper base 2. A mounting bracket 22 is fixedly mounted on the upper base 2, and an adjusting screw 23 is rotatably mounted on the mounting bracket 22, and the adjusting screw 23 is threadedly connected to the threaded tube 21.

[0035] In this embodiment, by adjusting the threaded connection between the screw 23 and the threaded tube 21, the operator can precisely adjust the initial mold gap between the upper mold 19 and the lower mold 4. This adjustment method is highly precise and can meet the mold gap requirements for different sole thicknesses, different material molding processes, and special design requirements. It ensures the accurate dimensions and stable quality of the molded soles after molding, greatly improving the mold's adaptability to diverse products. The position of the upper mold 19 can be adjusted by rotating the adjusting screw 23. The operation is simple and intuitive, allowing the operator to quickly adjust the mold gap according to actual production needs. The need for complex disassembly or reassembly is eliminated, significantly shortening mold adjustment time, improving production efficiency, and reducing the operator's skill requirements. The adjusting screw 23, threaded tube 21, and mounting bracket 22 are simple in structure, yet rationally designed and tightly coupled. The threaded connection has excellent self-locking properties, ensuring that the position of the upper mold 19 will not be easily shifted by vibration or external forces during mold operation. This ensures the reliability and stability of the mold structure, extends the mold's service life, and reduces production interruptions and maintenance costs caused by structural failures.

[0036] In a further preferred embodiment of the present invention, the upper base 2 and the upper mold 19 are both provided with injection holes for injecting raw materials and exhaust holes for discharging gas, and the injection holes respectively provided on the upper base 2 and the upper mold 19 are connected to each other, and the exhaust holes respectively provided on the upper base 2 and the upper mold 19 are connected to each other.

[0037] In this embodiment, the interconnected injection holes A and B provide a smooth injection channel for the raw materials, ensuring that the raw materials can be quickly and evenly filled into every corner of the molding chamber, reducing the flow resistance of the raw materials during the injection process, avoiding problems such as local material shortages and uneven thickness of the soles caused by insufficient raw material filling, and improving the molding quality and product qualification rate of the soles. The interconnected exhaust holes C and D can promptly exhaust the air in the molding chamber, preventing the air from being trapped inside the soles during the raw material filling process and forming bubbles or cavities. This not only ensures the appearance quality of the soles, but also enhances the physical properties of the soles, such as strength and toughness, and improves the service life and wearing comfort of the soles. The reasonable arrangement of the injection holes and exhaust holes helps to maintain pressure balance and temperature uniformity in the molding chamber, providing a stable process environment for sole molding.

[0038] The present invention also provides a double-layer sole forming process, comprising the following steps: S1: Open the upper base 2 and select the appropriate lower mold 4 and upper mold 19 according to the required sole shape; The lower mold 4 is provided with a notch corresponding to the positioning block 3. The lower mold 4 is placed in the lower base 1 and docked with the positioning block 3. The movable groove 20 provided on the upper mold 19 is slidably connected to the guide rod 18, and the threaded tube 21 on the upper mold 19 is passed through the upper base 2; S2: Rotate the adjusting screw 23 so that the adjusting screw 23 rotatably mounted on the mounting bracket 22 is threadedly embedded in the threaded tube 21. Since the guide rod 18 is connected to the movable groove 20, the upper mold 19 cannot rotate. The position of the upper mold 19 in the upper base 2 is adjusted. At this time, the upper mold 19 is fixed in the upper base 2. Cover the upper base 2, and adjust the upper mold 19 to a position where the distance between it and the lower mold 4 is the thickness of the first layer of the sole by rotating the adjusting screw 23. Inject the first layer of material into the space between the molds through the injection hole, and then exhaust through the exhaust hole. S3: After cooling and semi-forming, the adjusting screw 23 is rotated to move the upper mold 19 upward, forming a cavity between the first layer material and the upper mold 19. The second layer material is injected through the injection hole to fill the cavity and then wait for molding; S4: After the sole is formed, the adjusting screw 23 is rotated to separate the upper mold 19 from the sole. Since the contact area between the lower mold 4 and the sole is large and contains patterns, it is not easy to separate from the sole. The staff needs to use external force to remove the sole; Holding the operating block 15, the piston 11 is pulled outwards through the push rod 14. The second one-way valve 12 provided on the piston 11 opens and connects with the balancing hole 16 and the vent 13 provided on the piston 11, allowing external air to enter the intake pipe 7 from the balancing hole 16 through the vent 13 and the second one-way valve 12. Then push the piston 11 inward, at this time the second one-way valve 12 is closed, the first one-way valve 10 is opened, and the gas passes through the vent 13 provided on the closing block 9, enters the communicating port 8, and is injected into the space between the lower mold 4 and the sole through the air inlet 6. The entry of gas forms a gap between the lower mold 4 and the sole. By repeatedly pushing and pulling the piston 11, air is continuously injected into the vent 13, thereby separating the lower mold 4 from the sole. S5: After the lower mold 4 is separated from the sole, the sole can be taken out directly, or the sole can be separated from the mold after the lower mold 4 is taken out; The lower mold 4 is reconnected to the lower base 1 to prepare for the next sole production, and the above steps are repeated to realize the production of the sole.

[0039] To sum up, compared with the relevant technologies, the double-layer sole forming mold and its forming process realize the formation of an air cushion layer between the sole and the lower mold by air injection after the sole is cast and formed by setting a separation mechanism and reasonably designing the mold structure, and use air pressure to assist demolding, effectively avoiding damage to the sole during demolding and improving the quality of the finished sole. At the same time, the mold and its forming process also have the advantages of reasonable and stable structure, convenient and efficient operation, precise adjustment of mold spacing, ensuring uniform filling of raw materials and smooth discharge of air, extending mold service life, and adaptability to diversified product production, which significantly improves the production efficiency and quality of double-layer soles.

[0040] In the several embodiments provided in this application, it should be understood that the disclosed device can be implemented in other ways.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also fall within the scope of protection of the present invention.

Claims

1. A double-layer sole forming mold, characterized in that: include: a lower base hingedly connected to the upper base; a positioning block, the positioning block being fixedly mounted in the lower base; A lower mold, the lower mold is arranged in the lower base, and the lower mold is slidably connected to the positioning block; A base, the base being fixedly mounted on the bottom of the lower base, and the base being provided with a separation mechanism for injecting air between the sole and the lower mold; An air inlet is provided on the lower mold and is arranged corresponding to the separation mechanism.

2. The double-layer sole forming mold according to claim 1, characterized in that: The separation mechanism includes an air intake pipe, a connecting port, a closing block, a first one-way valve and an inflation mechanism. The air intake pipe with the connecting port on the top is fixedly mounted on the base, and the connecting port is communicated with the air intake pipe. The closing block is fixedly mounted on the air intake pipe and is arranged on a side corresponding to the connecting port. The first one-way valve is arranged on the closing block for controlling the direction of airflow. The inflation mechanism is arranged in the air intake pipe for injecting external air through the air intake into the sole and the lower mold to achieve separation.

3. The double-layer sole forming mold according to claim 2, characterized in that: The communication port is configured in a bell-mouth shape, and a diameter of the communication port gradually decreases as the distance between the communication port and the air inlet gradually approaches.

4. The double-layer sole forming mold according to claim 2, characterized in that: The inflation mechanism includes a piston, a second one-way valve, a vent, a push rod, an operating block and a balancing hole. The piston is sealingly and slidably installed in the intake pipe. The second one-way valve is arranged on the piston. The vent is respectively arranged on the closing block and the piston. The push rod is fixedly installed on the piston and extends to the outside of the intake pipe. The operating block is fixedly installed on the push rod. The balancing hole is opened on the intake pipe and is arranged at an end corresponding to the push rod.

5. The double-layer sole forming mold according to claim 4, characterized in that: The first one-way valve and the second one-way valve are correspondingly arranged and opened alternately by the movement of the piston, so as to inject external air into the space between the lower mold and the sole.

6. The double-layer sole forming mold according to claim 1, characterized in that: An annular block is fixedly installed in the communication port, and the annular block is used to prevent raw materials from entering the air inlet pipe.

7. The double-layer sole forming mold according to claim 1, characterized in that: A guide rod is fixedly installed in the upper base, an upper mold with a movable groove is slidably connected to the guide rod, and the upper mold is arranged in the upper base.

8. The double-layer sole forming mold according to claim 7, characterized in that: A threaded tube is fixedly mounted on the upper mold and slides through the upper base. A mounting bracket is fixedly mounted on the upper base and an adjusting screw is rotatably mounted on the mounting bracket. The adjusting screw is threadably connected to the threaded tube.

9. The double-layer sole forming mold according to claim 7, characterized in that: The upper base and the upper mold are both provided with injection holes for injecting raw materials and exhaust holes for discharging gas. The injection holes respectively provided on the upper base and the upper mold are connected to each other, and the exhaust holes respectively provided on the upper base and the upper mold are connected to each other.

10. A double-layer sole forming process, characterized in that: Comprising the double-layer sole forming mold according to any one of claims 1 to 9, the process comprises the following steps: S1: Open the upper base and select the appropriate lower mold and upper mold according to the required sole shape; The lower mold is provided with a notch corresponding to the positioning block. The lower mold is placed in the lower base and docked with the positioning block. The movable groove on the upper mold is slidably connected to the guide rod, and the threaded tube on the upper mold is passed through the upper base; S2: Rotate the adjusting screw so that the adjusting screw thread mounted on the mounting frame is embedded in the threaded tube. Since the guide rod is connected to the movable groove, the upper mold cannot rotate, and the position of the upper mold in the upper base is adjusted. At this time, the upper mold is fixed in the upper base. Cover the upper base, adjust the upper mold to a position where the distance between it and the lower mold is the thickness of the first layer of the sole by rotating the adjusting screw, inject the first layer of material into the space between the molds through the injection hole, and then exhaust through the exhaust hole; S3: After cooling and semi-forming, the adjusting screw is turned to move the upper mold upward, forming a cavity between the first layer material and the upper mold. The second layer material is injected through the injection hole to fill the cavity and then wait for molding; S4: After the sole is formed, the adjusting screw is turned to separate the upper mold from the sole. Since the lower mold has a large contact area with the sole and contains patterns, it is not easy to separate from the sole. The staff needs to use external force to remove the sole; Hold the operating block and pull the piston outwards through the push rod. The second one-way valve provided on the piston opens and connects with the balance hole and the vent provided on the piston, allowing external air to enter the intake pipe from the balance hole through the vent and the second one-way valve. Push the piston inward again. At this time, the second one-way valve is closed and the first one-way valve is opened. The gas passes through the vent provided on the closing block, enters the communicating port, and is injected into the space between the lower mold and the sole through the air inlet. The entry of the gas forms a gap between the lower mold and the sole. By repeatedly pushing and pulling the piston, air is continuously injected into the vent, thereby separating the lower mold from the sole. S5: After the lower mold is separated from the sole, the sole can be taken out directly, or the sole can be separated from the mold after the lower mold is taken out; The lower mold is reconnected to the lower base to prepare for the next sole production, and the above steps are repeated to realize the production of the sole.

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