Sole demolding treatment device for safety shoe manufacturing

Abstract

The invention relates to the field of safety shoe manufacturing and injection molding equipment, and discloses a sole demolding treatment device for safety shoe manufacturing, which comprises a front mold frame and a rear mold frame, the four corners of the inner side ends of the front mold frame and the rear mold frame are respectively connected through four guide columns; a front mold base is fixedly installed in the middle of the inner side end of the front mold base, an injection molding connector is arranged in the middle of the outer side end of the front mold base, fixing guide rods are fixedly installed at the four corners of the inner side end of the front mold base, and the outer diameters of the middles of the fixing guide rods are movably installed at the four corners of the rear mold base correspondingly. A shoe mold cavity is formed in the middle of the end, close to the front mold base, of the rear mold base, and a transverse frame is arranged in the middle of the front mold frame and the middle of the rear mold frame. Through the design of multi-directional ejection, high-pressure gas assistance and adjustable thrust, the demolding thrust is uniform and stable, the shoe mold is not damaged, meanwhile, the demolding efficiency and universality are improved, operation is simplified, continuous production is guaranteed, and the mold is suitable for molding of shoe soles of safety shoes of multiple specifications.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of safety shoe manufacturing and injection molding equipment, in particular to a sole demolding treatment device for safety shoe manufacturing. BACKGROUND

[0002] In the production and manufacturing of safety shoes, sole forming is one of the core processes, and the effect of demolding treatment directly affects the forming quality, production efficiency and production cost of the sole. At present, the safety shoe sole is mostly made by injection molding process, that is, after the mold is closed and the injection liquid is injected, cooled and solidified, the formed sole is separated from the mold cavity. This process needs to rely on the demolding device to complete the core operation, and the performance of the demolding device has become a key factor restricting the large-scale production of safety shoes. With the increasing requirements of the market for product quality and production efficiency of safety shoes, the traditional demolding device gradually exposes many adaptability problems.

[0003] The traditional safety shoe sole demolding device generally has the defect of unstable pushing force, and mostly uses a single spring driven ejector pin structure. The spring force will fluctuate with the change of the bending degree, resulting in the pushing force of the ejector pin being large or small. When the pushing force is insufficient, the sole is easy to stick to the inner wall of the mold cavity and is difficult to separate quickly; when the pushing force is too large, the sole will be deformed and scratched, reducing the product pass rate. At the same time, most devices use one-way ejection design, which only exerts force from the front or side of the sole in a single direction, which is easy to cause local sticking and cannot be separated, and needs manual assistance to peel off, which not only increases the labor intensity, but also further reduces the production efficiency. In addition, the pushing force of the traditional device is mostly a fixed value, which cannot be flexibly adjusted according to safety shoes with different thickness and material, and the adaptability is poor. When changing product specifications, the equipment needs to be adjusted frequently, increasing the production preparation time and operation cost.

[0004] On the other hand, the traditional demolding device lacks effective auxiliary demolding and mold cavity cleaning structure. The friction between the sole and the inner wall of the mold cavity is large during the demolding process, further increasing the difficulty of demolding. And the residual heat and a small amount of injection liquid debris in the mold cavity after injection molding will affect the quality of the next sole forming if not treated in time. Manual cleaning needs to be performed to extend the production cycle. At the same time, the mechanical transmission structure design of some devices is unreasonable, and the guiding precision is insufficient during the closing and demolding processes, which is easy to cause the mold to deviate, resulting in a decrease in the forming precision of the sole, and cannot meet the strict requirements of safety shoes on structural stability and protective performance. Therefore, it has become a technical problem to be solved in the industry to develop a safety shoe sole demolding treatment device with stable pushing force, high demolding efficiency, strong adaptability and auxiliary mold cavity cleaning. SUMMARY

[0005] In view of the shortcomings of the prior art, the present application provides a shoe sole demolding treatment device for labor protection shoe manufacturing, which solves the problems of unstable pushing force, low demolding efficiency, poor adaptability and inconvenient mold cavity cleaning of the traditional demolding device, and guarantees the shoe mold quality and production continuity.

[0006] To achieve the above object, the present application is implemented by the following technical scheme: a shoe sole demolding treatment device for labor protection shoe manufacturing, comprising a front mold frame and a rear mold frame, the inner side ends of the front mold frame and the rear mold frame are connected by four guide columns at four corners respectively, a front mold seat is fixedly installed at the middle of the inner side end of the front mold frame, and an injection joint is arranged at the middle of the outer side end of the front mold frame, fixed guide rods are fixedly installed at the four corners of the inner side end of the front mold seat, the middle part of the fixed guide rods is movably installed on the four corners of the rear mold seat respectively, and a shoe mold cavity is arranged at the middle of one end of the rear mold seat close to the front mold seat.

[0007] Preferably, the middle part of the front mold frame and the rear mold frame is provided with a cross frame, both ends of the cross frame are movably installed with rotating frames, both sides of the inside of the cross frame are provided with first cavities, spring plates are fixedly installed at both sides of the inside of the first cavities, and the ends of the spring plates extend to the inside of the rotating frame on the corresponding side, and pressure rollers are fixedly installed on the inner side wall of the rotating frame, and the ends of the pressure rollers abut against the front surface of the spring plate on the corresponding side.

[0008] Preferably, two first connecting rods are movably installed at the outer side of one end of the rotating frame close to the front mold frame, and the ends of the first connecting rods are movably installed at the ends of the fixed guide rods on the corresponding side, a second connecting rod is movably installed at the inner side of one end of the rotating frame close to the front mold frame, the ends of the second connecting rod are movably installed with right thimbles, thimble grooves are arranged at both sides of the inside of the rear mold seat, and the ends of the right thimbles extend to the inside of the shoe mold cavity through the thimble grooves on the corresponding side, and the middle part of the inner side end of the cross frame and the rear mold seat are connected by two connecting frames.

[0009] Preferably, support tables are movably installed in the inside of the first cavities, and the front ends of the support tables abut against the back surface of the spring plate on the corresponding side, short shafts are movably installed in the inner side wall of the first cavities, threaded rods are fixedly installed at the outer side ends of the short shafts, and the outer diameters of the threaded rods are threadedly connected in the middle part of the support table on the corresponding side.

[0010] Preferably, a second cavity is arranged in the middle part of the inside of the cross frame, an adjusting rod is movably installed at one end of the inner side wall of the second cavity, an inner hexagonal adjusting nut is fixedly installed at the end of the adjusting rod extending to the outside of the cross frame, a driving bevel gear is fixedly installed at the inner side end of the adjusting rod, the inner side ends of driven bevel gears are fixedly installed at the inner side ends of the short shafts extending to the inside of the second cavity, and the inner side ends of the driven bevel gears are meshingly connected with the outer side of the driving bevel gear.

[0011] Preferably, a fixed ring frame is fixedly installed on the outer diameter of the guide column close to the rear die seat, and an inclined groove is formed in the inner side wall of the fixed ring frame.

[0012] Preferably, a thimble groove is formed in the inner side wall of the shoe mold cavity, and a side thimble is movably installed in the thimble groove, the outer side end of the side thimble extends to the outside of the rear die seat and abuts against the inner wall of the corresponding inclined groove, and a return spring is fixedly installed on the outer diameter of the side thimble.

[0013] Preferably, the inner side end of the positive thimble is connected through a communication pipe, a high-pressure gas inlet pipe is fixedly installed on one side of the communication pipe, and a plurality of gas outlets are formed in the outer diameter of the side of the positive thimble close to the shoe mold cavity.

[0014] Preferably, an electric cylinder is fixedly installed on the outer side end of the rear die frame, and a push frame is fixedly installed on the driving end of the electric cylinder extending to the inner side of the rear die frame.

[0015] The present application provides a shoe sole demolding treatment device for labor protection shoe manufacturing. 1、The spring plate, the compression roller and the first connecting rod are cooperatively designed, the compression roller slides along the surface of the spring plate during mold closing, the force arm is dynamically adjusted during the bending process of the spring plate, the difference between the spring force and the bending degree is compensated, and the pushing force applied to the positive thimble during the release of the spring force is always uniform and stable. This design not only meets the sufficient pushing force required for demolding, but also avoids damage such as deformation and scratching of the shoe mold caused by excessive pushing force in traditional demolding devices, especially for products such as labor protection shoe soles which require precise molding, and ensures the molding quality of the shoe mold.

[0016] 2、The present application adopts a multi-directional ejection structure of "double positive thimble + four side thimbles": the positive thimble exerts force from the middle of the shoe mold, and the side thimbles simultaneously push along the four sides of the shoe mold, completely solving the problem of easy sticking of the shoe mold to the mold cavity in single ejection mode, and realizing uniform demolding of the shoe mold in all directions. At the same time, high-pressure gas is injected through the gas outlets during the ejection of the positive thimble, on the one hand, the gas pressure is used to further separate the shoe mold from the inner wall of the mold cavity, reducing the sticking resistance; on the other hand, the high-pressure gas can quickly remove the residual heat in the mold cavity, realizing integrated cooling and cleaning, avoiding the influence of residual injection liquid on the next molding, and significantly improving the demolding efficiency and continuous production capacity.

[0017] 3、The hexagonal adjusting nut, the linkage structure of bevel gear set and threaded rod can conveniently adjust the position of the supporting table, and then change the fulcrum and stress characteristics of the spring plate, so that the accurate adjustment of the positive thimble thrust is realized. The design breaks the limitation of the fixed thrust of the traditional demolding device, can flexibly adapt to the demolding thrust according to the demand of different thickness and material of labor protection shoes sole, can ensure the smooth demolding of thick sole and hard sole, can avoid the damage to thin sole and soft sole, greatly improves the universality and adaptability of the device, and reduces the equipment adjustment cost when producing multiple specifications. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a perspective view of the present application; Figure 2 It is a structural schematic view of the rear mold base in the present application; Figure 3 It is a structural schematic view of the cross frame in the present application; Figure 4 It is Figure 3 the enlarged view of A in the figure; Figure 5 It is a structural schematic view of the second chamber in the present application; Figure 6 It is a structural schematic view of the fixed ring base in the present application; Figure 7 It is a structural schematic view of the communication pipe in the present application.

[0019] 1, front mold frame;2, rear mold frame;3, guide column;4, front mold base;5, fixed guide rod;6, rear mold base;7, shoe mold cavity;8, cross frame;9, rotating frame;10, first chamber;11, spring plate;12, compression roller;13, first connecting rod;14, second connecting rod;15, positive thimble;16, supporting table;17, short shaft;18, threaded rod;19, second chamber;20, adjusting rod;21, hexagonal adjusting nut;22, driving bevel gear;23, driven bevel gear;24, fixed ring frame;25, inclined groove;26, side thimble;27, return spring;28, connecting frame;29, communication pipe;30, high-pressure gas inlet pipe;31, gas outlet;32, electric cylinder;33, push frame. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings of the specification of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0021] Embodiment: please refer to the drawings of the present application Figure 1 -Figure 7 This invention provides a sole demolding device for manufacturing work shoes, such as... Figure 1 As shown, the device includes a front mold frame 1 and a rear mold frame 2. The front mold frame 1 and rear mold frame 2 serve as the overall support structure of the device, providing a stable mounting base for each component. The four corners of the inner ends of the front mold frame 1 and rear mold frame 2 are connected by four guide pillars 3. The guide pillars 3 provide precise guidance, ensuring the stable movement trajectory of the front mold base 4 and rear mold base 6 during mold closing and demolding, and preventing deviations that could affect the shoe mold forming accuracy. The front mold base 4 is fixedly installed in the middle of the inner end of the front mold frame 1, and an injection joint is provided in the middle of the outer end. The front mold base 4 and rear mold base 6 cooperate to form a closed shoe mold forming space. The injection joint serves as a channel for introducing the injection liquid, allowing the molten injection liquid to be precisely injected into the shoe mold cavity 7. Fixed guide rods 5 are fixedly installed at the four corners of the inner end of the mold base 4. The fixed guide rods 5 not only play an auxiliary guiding role, but also can realize the synchronous action of the ejector pins by linking the rotating frame 9 through the linkage mechanism during the mold closing and demolding process. The outer diameter of the middle part of the fixed guide rods 5 is movably installed on the four corners of the rear mold base 6, so that the rear mold base 6 can move smoothly along the axis of the fixed guide rods 5, ensuring the fitting accuracy during mold closing and the smoothness of separation during demolding. A shoe mold cavity 7 is opened in the middle of the end of the rear mold base 6 near the front mold base 4. The shape of the shoe mold cavity 7 is completely matched with the design structure of the work shoe sole. It is the core area of ​​the injection liquid cooling and molding into the sole. The smoothness of its inner wall directly affects the molding quality of the sole.

[0022] In the embodiment, the middle part of the front mold frame 1 and the rear mold frame 2 is provided with a cross frame 8, which is a key transmission component connecting the rear mold base 6 and the electric cylinder 32. The rear mold base 6 is driven by the connecting frame 28 to realize the actions of mold closing and mold opening synchronously. The two ends of the cross frame 8 are movably installed with rotating frames 9, which can rotate flexibly around the connecting points of the cross frame 8. The rotating frames 9 serve as intermediates for force transmission, converting the force of the fixed guide rod 5 into the bending force of the spring plate 11 and the moving force of the positive ejector pin 15. The inside of the cross frame 8 is provided with first chambers 10 on both sides, which provide independent installation and movement space for the spring plate 11, the support table 16 and other components, avoiding mutual interference during the movement of the components. The spring plate 11 is fixedly installed inside the first chamber 10 on both sides, and the end of the spring plate 11 extends into the inside of the corresponding rotating frame 9. The spring plate 11 has good elastic deformation capacity, accumulates elastic force by bending during mold closing, and releases elastic force to provide stable thrust force for the positive ejector pin 15 during mold opening. The structure design of the spring plate 11 extending into the rotating frame 9 ensures stable contact with the compression roller 12. The compression roller 12 is fixedly installed on the inner side wall of the rotating frame 9, and the end of the compression roller 12 abuts against the front surface of the corresponding spring plate 11. The compression roller 12 can rotate around its own axis and slide along the surface of the spring plate 11 under the bending of the rotating frame 9. By changing the length of the force arm, the difference in elastic force caused by the change in the bending degree of the spring plate 11 is compensated, ensuring that the elastic force released by the spring plate 11 is always uniform and stable, thereby ensuring the consistency of the thrust force of the positive ejector pin 15.

[0023] Further, the outer side of the end of the rotating frame 9 close to the front mold frame 1 is movably provided with two first connecting rods 13, and the ends of the first connecting rods 13 are movably provided at the ends of the corresponding fixed guide rods 5. The first connecting rods 13 serve as the transmission connecting piece between the rotating frame 9 and the fixed guide rod 5. When the mold is closed, the rear mold base 6 drives the cross frame 8 to move towards the front mold base 4, the fixed guide rod 5 extends relative to the rear mold base 6, and the rotating frame 9 is bent around the end of the cross frame 8 through the first connecting rod 13 to accumulate elastic force. The inner side of the end of the rotating frame 9 close to the front mold frame 1 is movably provided with a second connecting rod 14, and the second connecting rod 14 connects the rotating frame 9 and the straight ejector pin 15 to convert the bending movement of the rotating frame 9 into the linear reciprocating movement of the straight ejector pin 15. When the mold is closed, the straight ejector pin 15 is pulled back, and when the mold is demolded, the straight ejector pin 15 is pushed out. The ends of the second connecting rods 14 are movably provided with straight ejector pins 15. The straight ejector pin 15 is the core executive component for front demolding of the shoe sole, and the end thereof extends into the shoe mold cavity 7. When demolding, the shoe sole is lifted from the middle of the mold cavity under the action of the elastic force of the spring plate 11 to avoid local excessive stress leading to deformation of the shoe sole. The inside of the rear mold base 6 is provided with an ejector pin slot on both sides, and the ends of the straight ejector pins 15 extend into the inside of the shoe mold cavity 7 through the corresponding ejector pin slots. The ejector pin slot provides a storage channel and movement guide for the straight ejector pin 15 to ensure that the straight ejector pin 15 does not deviate and does not jam during reciprocating movement, thereby ensuring the accuracy of the ejecting action. The inner side of the middle of the cross frame 8 and the rear mold base 6 is connected through two connecting frames 28. The connecting frame 28 is designed in a symmetrical manner to ensure that the power transmitted by the cross frame 8 is evenly applied to the rear mold base 6, so that the rear mold base 6 remains stable and horizontal during movement, avoiding tilting that may cause the mold to close tightly or the demolding to be blocked.

[0024] Further, the inside of the first chamber 10 is movably provided with a support table 16, and the front end of the support table 16 abuts against the rear surface of the corresponding spring plate 11. The support table 16 serves as the fulcrum of the spring plate 11, and its position can be adjusted by a threaded rod 18 to change the stress characteristics and elastic force of the spring plate 11, thereby adapting to the demolding requirements of shoe soles of different specifications and materials. The middle of the inner side wall of the first chamber 10 is movably provided with a short shaft 17. The short shaft 17 can rotate flexibly around its own axis to transmit the rotary power of the driven bevel gear 23 and drive the threaded rod 18 to rotate synchronously. The inner side wall of the first chamber 10 provides stable support for the short shaft 17 to ensure that it does not shake during rotation. The outer side end of the short shaft 17 is fixedly provided with a threaded rod 18, and the outer diameter of the threaded rod 18 is threadedly connected to the middle of the corresponding support table 16. The threaded connection structure between the threaded rod 18 and the support table 16 converts rotary motion into linear motion. When the threaded rod 18 rotates, the support table 16 moves along the axis of the first chamber 10 to accurately adjust the position of the fulcrum of the spring plate 11. The threaded connection has a self-locking function to ensure that the position of the support table 16 remains stable after adjustment and does not deviate due to vibration and other factors.

[0025] Further, the inner middle part of the cross frame 8 is provided with a second cavity 19, which provides a sealed installation space for the transmission components such as the driving bevel gear 22 and the driven bevel gear 23, so as to avoid the influence of dust, residual injection liquid and the like on the flexibility and service life of the gear transmission. One end of the inner side wall of the second cavity 19 is movably provided with an adjusting rod 20, which can rotate around its own axis. One end of the adjusting rod 20 is connected with an inner hexagonal adjusting nut 21, and the other end is connected with the driving bevel gear 22, thereby playing a role of a power transmission bridge. The other end of the adjusting rod 20 extends to the outside of the cross frame 8 and is fixedly provided with the inner hexagonal adjusting nut 21. The inner hexagonal adjusting nut 21 is convenient for an operator to use an inner hexagonal wrench to manually adjust, which is convenient to operate and has high adjustment accuracy. The thrust force can be finely adjusted by rotating the inner hexagonal adjusting nut 21 without the need for complex tools or professional skills. The inner side end of the adjusting rod 20 is fixedly provided with the driving bevel gear 22, which is a power input gear and rotates under the driving of the adjusting rod 20. The driving bevel gear 22 transmits power to the driven bevel gears 23 on both sides through gear meshing, so as to realize power shunt and synchronous transmission. The inner side end of the short shaft 17 extends to the inside of the second cavity 19 and is fixedly provided with the driven bevel gear 23. The driven bevel gear 23 is meshed with the driving bevel gear 22, converts the rotary motion of the driving bevel gear 22 into the rotary motion of the driven bevel gear 23, and further drives the short shaft 17 and the threaded rod 18 to rotate. The inner side end of the driven bevel gear 23 is meshed with the outer side of the driving bevel gear 22. The driving bevel gears 22 are meshed and driven, which can realize the vertical transmission of power, and the driven bevel gears 23 are symmetrically distributed on both sides to ensure that the rotation directions of the threaded rods 18 on both sides are consistent and the rotation speeds are the same, so that the support tables 16 on both sides move synchronously and the spring plates 11 on both sides are uniformly stressed.

[0026] Further, the outer diameter of the guide column 3 is fixedly provided with a fixed ring frame 24 near the rear mold seat 6. The fixed ring frame 24 is fixed on the guide column 3 and remains stationary. The inclined groove 25 on the inner side wall of the fixed ring frame 24 provides motion guidance for the side ejector pin 26 and is a key structure for the side ejector pin 26 to realize radial ejection. The fixed ring frame 24 is installed near the rear mold seat 6 to ensure that the side ejector pin 26 always contacts the inclined groove 25 during the movement of the rear mold seat 6. The inner side wall of the fixed ring frame 24 is provided with the inclined groove 25 around. The inclined groove 25 is designed to be inclined, and the inclination angle is accurately calculated. During the linear movement of the rear mold seat 6 during mold closing and mold opening, the outer end of the side ejector pin 26 slides along the inclined groove 25, thereby generating radial reciprocating displacement, achieving the retracting and ejecting actions of the side ejector pin 26. The surface of the inclined groove 25 is treated to be smooth to reduce the friction resistance between the inclined groove 25 and the side ejector pin 26, thereby ensuring smooth movement of the side ejector pin 26.

[0027] Further, the inner side wall of the shoe mold cavity 7 is provided with a thimble groove, and the side thimble 26 is movably installed in the thimble groove. The side thimble 26 is evenly distributed along the circumference of the shoe mold cavity 7 and is used to eject from the side of the sole. It avoids the difficulty of demolding or damage to the sole due to adhesion to the mold cavity wall. The thimble groove provides accommodation and movement space for the side thimble 26, ensuring that the side thimble 26 does not affect the sealing of the shoe mold cavity 7 during radial movement. The outer side end of the side thimble 26 extends to the outside of the rear mold seat 6 and abuts against the inner wall of the corresponding side of the inclined groove 25. The outer side end of the side thimble 26 is tightly fitted with the inclined groove 25. Through the movement of the rear mold seat 6, the force is transmitted, and the side thimble 26 is guided by the inclined groove 25 to complete the radial displacement. The outer diameter of the side thimble 26 is fixedly installed with a return spring 27. The return spring 27 is sleeved on the outer diameter of the side thimble 26. When the mold is closed, the side thimble 26 moves outward along the inclined groove 25, and the return spring 27 is compressed to accumulate elastic force. When demolding, the return spring 27 releases the elastic force, which helps the side thimble 26 to quickly reset and eject the side of the sole. At the same time, the return spring 27 can also play a buffering role, avoiding damage to the sole caused by excessive pushing force of the side thimble 26. The elastic recovery force ensures that the side thimble 26 can be accurately retracted into the thimble groove after each demolding, preparing for the next closing of the mold.

[0028] Further, the inner side end of the positive thimble 15 is connected through a communication pipe 29. The communication pipe 29 is designed in a sealed manner to ensure that high-pressure gas does not leak, realizing the gas communication of multiple positive thimbles 15, so that high-pressure gas can be evenly distributed to each positive thimble 15, ensuring that the gas pressure of each gas outlet 31 is consistent. One side of the communication pipe 29 is fixedly installed with a high-pressure gas inlet pipe 30, which serves as an input channel for high-pressure gas and can be connected with an external high-pressure gas source. The gas import time and pressure can be controlled according to the demolding requirements. The outer diameter of the side of the positive thimble 15 close to the shoe mold cavity 7 is provided with a plurality of gas outlets 31. The gas outlets 31 are evenly distributed along the length direction of the positive thimble 15 and face the inner wall of the shoe mold cavity 7. During demolding, high-pressure gas is sprayed from the gas outlets 31. On the one hand, it can form a layer of gas film between the sole and the inner wall of the shoe mold cavity 7, reducing the friction between the two, and assisting the sole to separate quickly. On the other hand, the high-pressure gas can carry away the residual heat in the shoe mold cavity 7 during flow, realizing the cooling of the mold cavity, and also blowing away the small amount of injection liquid debris remaining in the mold cavity, playing a role in cleaning the mold cavity, avoiding the influence of residual impurities on the quality of the next sole forming.

[0029] Further, the outer side end of the rear mold frame 2 is fixedly installed with an electric cylinder 32, which serves as the power driving source of the device, has the characteristics of stable power output and precise stroke control, and can provide continuous and controllable driving force for the clamping and demolding process. It is installed at the outer side end of the rear mold frame 2, which not only ensures the stability of installation, but also facilitates the later maintenance and repair. The driving end of the electric cylinder 32 extends to the inner side of the rear mold frame 2 and is fixedly installed with a push frame 33. The push frame 33 is designed in a rigid structure and can uniformly transmit the driving force of the electric cylinder 32 to the cross frame 8, avoiding local excessive stress that may cause deformation of the components. The contact surface of the push frame 33 and the cross frame 8 is adapted to ensure the effectiveness of power transmission. When clamping, the electric cylinder 32 drives the push frame 33 to move forward, pushing the cross frame 8 to drive the rear mold base 6 to move towards the front mold base 4 until the clamping is completed. When demolding, the electric cylinder 32 controls the push frame 33 to move backward, and under the elastic force of the spring plate 11, drives the rear mold base 6 to separate from the front mold base 4, realizing the automatic control of the demolding action without manual operation, greatly improving the production efficiency and operation safety.

[0030] Working principle: First, the electric cylinder 32 is started, the push frame 33 is driven to move by the electric cylinder 32, and the push frame 33 contacts the cross frame 8 to drive the rear mold base 6 to move through the connecting frame 28 until the rear mold base 6 and the front mold base 4 complete the mold closing. In this process, the fixed guide rod 5 will bend the rotating frame 9 through the first connecting rod 13, when the rotating frame 9 is bent, it will press the spring plate 11 through the pressure roller 12 and accumulate the elastic force, at the same time, when the rotating frame 9 is bent, it will drive the positive ejector pin 15 to move through the second connecting rod 14, the positive ejector pin 15 is retracted into the ejector pin groove, at the same time, the side ejector pin 26 will move along the inclined groove 25 in the inner wall of the fixed ring frame 24, under the action of the reset spring 27, the side ejector pin 26 also returns to the ejector pin groove, at this time, the injection liquid is injected into the mold cavity 7 of the shoe mold after the mold closing through the injection joint and the shoe mold is formed, after the shoe mold is cooled, the push frame 33 is controlled to return to the original position by the electric cylinder 32, at this time, the elastic force of the bent spring plate 11 is released, the cross frame 8 and the rear mold base 6 are reset, the rear mold base 6 and the front mold base 4 are separated, in this process, the positive ejector pin 15 will also be pushed out of the ejector pin groove by the spring plate 11, and the shoe mold will be pushed out of the shoe mold cavity 7, because the pressure roller 12 will slide on the surface during the bending process of the spring plate 11, the moment arm of the bent spring plate 11 will also change, which compensates the changing elastic force of the spring plate 11 with the change of the bending degree, the elastic force release process is the same, so that the pushing force of the spring plate 11 to the positive ejector pin 15 is always uniform and stable, which ensures the required ejecting force and avoids damage to the shoe mold caused by excessive ejecting force, at the same time, when the positive ejector pin 15 is pushed out of the ejector pin groove, high pressure gas is introduced into the communication pipe 29 through the high pressure gas introduction pipe 30, the gas flows through the inside of the positive ejector pin 15 and is discharged into the shoe mold cavity 7 through the gas outlet 31, which not only assists the separation of the shoe mold and the shoe mold cavity 7, but also cools and cleans the shoe mold cavity 7, avoiding the influence of residues on the next molding, at the same time, during the reset process of the rear mold base 6, the side ejector pin 26 moves along the inclined groove 25 and generates radial displacement, and is pushed out of the ejector pin groove, which performs the ejecting work on the side surface of the shoe mold, the double positive ejector pin 15 and the four side ejector pins 26 not only can avoid the adhesion of the side surface of the shoe mold to the side wall of the shoe mold cavity 7, but also can greatly improve the demolding efficiency, in addition, the inner hexagonal adjusting nut 21 can be rotated by the inner hexagonal wrench, the adjusting rod 20 and the driving bevel gear 22 are rotated, the driving bevel gear 22 drives the driven bevel gears 23 and the short shaft 17 on both sides to rotate, thereby driving the threaded rods 18 on both sides to rotate, when the threaded rods 18 rotate, the support table 16 in the first chamber 10 moves synchronously inward or outward, when the position of the support table 16 changes, the fulcrum of the spring plate 11 changes, the elastic force generated during bending also changes, so that the ejecting force of the positive ejector pin 15 also changes, which is convenient for demolding different shoe molds.

[0031] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A sole demolding treatment device for manufacturing safety shoes, comprising a front mold frame (1) and a rear mold frame (2), characterized in that, The inner side end four corners of the front mold frame (1) and the rear mold frame (2) are connected through four guide columns (3), the middle part of the inner side end of the front mold frame (1) is fixedly installed with a front mold base (4) and the middle part of the outer side end is provided with an injection joint, the inner side end four corners of the front mold base (4) are fixedly installed with fixed guide rods (5), the middle part outer diameter of the fixed guide rods (5) is movably installed on the four corners of the rear mold base (6), and the end of the rear mold base (6) close to the front mold base (4) is provided with a shoe mold cavity (7). The middle part of the front mold frame (1) and the rear mold frame (2) is provided with a cross frame (8), both ends of the cross frame (8) are movably installed with rotating frames (9), both sides of the inside of the cross frame (8) are provided with first cavities (10), both sides of the inside of the first cavities (10) are fixedly installed with spring plates (11), and the ends of the spring plates (11) extend to the inside of the corresponding rotating frame (9), the inner side wall of the rotating frame (9) is fixedly installed with pressing rollers (12), and the ends of the pressing rollers (12) abut against the front surface of the corresponding spring plate (11). The end of the rotating frame (9) close to the front mold frame (1) is movably installed with two first connecting rods (13), and the ends of the first connecting rods (13) are movably installed at the ends of the corresponding fixed guide rods (5), the end of the rotating frame (9) close to the front mold frame (1) is movably installed with a second connecting rod (14), the end of the second connecting rod (14) is movably installed with a right thimble (15), both sides of the inside of the rear mold base (6) are provided with thimble grooves, and the ends of the right thimbles (15) extend to the inside of the shoe mold cavity (7) through the corresponding thimble grooves, and the middle part of the inner side end of the cross frame (8) and the rear mold base (6) are connected through two connecting frames (28).

2. The shoe sole demolding treatment device for manufacturing safety shoes according to claim 1, characterized in that, The inside of the first cavity (10) is movably installed with a support table (16), and the front end of the support table (16) abuts against the back surface of the corresponding spring plate (11), the middle part of the inner side wall of the first cavity (10) is movably installed with a short shaft (17), the outer side end of the short shaft (17) is fixedly installed with a threaded rod (18), and the outer diameter of the threaded rod (18) is threadedly connected in the middle part of the corresponding support table (16).

3. The shoe sole demolding treatment device for manufacturing safety shoes according to claim 2, characterized in that, The middle part of the inside of the cross frame (8) is provided with a second cavity (19), one end of the inner side wall of the second cavity (19) is movably installed with an adjusting rod (20), the end of the adjusting rod (20) extends to the outside of the cross frame (8) and is fixedly installed with an internal hexagonal adjusting nut (21), the inner side end of the adjusting rod (20) is fixedly installed with a driving bevel gear (22), the inner side end of the short shaft (17) extends to the inside of the second cavity (19) and is fixedly installed with a driven bevel gear (23), and the inner side end of the driven bevel gear (23) is meshingly connected with the outer side of the driving bevel gear (22).

4. The shoe sole demolding treatment device for manufacturing safety shoes according to claim 1, characterized in that, The outer diameter of the guide column (3) is fixedly installed with a fixed ring frame (24) close to the rear mold base (6), and the inner side wall of the fixed ring frame (24) is provided with a slope groove (25) around.

5. The shoe sole demolding treatment device for manufacturing safety shoes according to claim 4, characterized in that, The inner side wall of the shoe mold cavity (7) is provided with a thimble groove, and a side thimble (26) is movably installed in the thimble groove.

6. The shoe sole demolding treatment device for manufacturing safety shoes according to claim 1, characterized in that, The inner side end of the positive thimble (15) is connected through a communication pipe (29), one side of the communication pipe (29) is fixedly provided with a high-pressure gas inlet pipe (30), and the outer diameter of the side of the positive thimble (15) close to the shoe mold cavity (7) is provided with a plurality of gas outlets (31).

7. The shoe sole demolding treatment device for manufacturing safety shoes according to claim 1, characterized in that, The outer side end of the rear mold frame (2) is fixedly provided with an electric cylinder (32), and the driving end of the electric cylinder (32) extends to the inner side of the rear mold frame (2) and is fixedly provided with a push frame (33).

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