A heel shaping machine for protective shoe production

Abstract

This invention discloses a heel shaping machine for protective shoe production, relating to the technical field of shoe material processing equipment. It includes a frame, a support base, a heel, a shaping mold, and a clamping base. The invention employs a clamping cylinder-driven linkage mechanism to control a pressure plate to rotate obliquely downwards to clamp the protective shoe heel blank. During the rotation process, the pressure plate applies not only an inward clamping force to the protective shoe heel blank but also a downward pulling force, ensuring the heel blank is fully stretched and conforms to the heel surface. This prevents the protective shoe heel blank from accumulating or wrinkling in areas with large curvature, or forming uneven creases at seams, thus effectively improving the shaping quality of the protective shoe heel.

Description

Technical Field

[0001] This invention relates to the field of shoe material processing equipment technology, and in particular to a heel shaping machine for the production of protective shoes. Background Technology

[0002] For protective footwear, especially workwear and safety footwear, the quality of the heel molding is crucial. A flat, snug, and wrinkle-free heel not only affects wearing comfort but also relates to the stability of the shoe structure and the effectiveness of heel protection.

[0003] Currently, common heel shaping equipment typically includes a shoe last (or heel mold) and an external shaping mold. During operation, the leather or composite material blank of the shoe heel is covered on the heel, and then pressure is applied through the external mold (which may be a rigid mold or an inflatable air bladder) to make the blank conform to the shape of the heel, thus completing the shaping.

[0004] However, existing technologies have significant drawbacks in implementation: when the heel blank is covered onto the heel and prepared for pressure shaping, the blank is often simply placed between the heel and the mold. Under the final pressure, the blank is prone to accumulating and wrinkling on the curved surface of the heel, especially in areas with a large curvature, or forming uneven creases at the seams. This results in an uneven heel surface after shaping, affecting the product's appearance. More importantly, the internal wrinkles may form stress concentration points, reducing the overall strength and durability of the material, and failing to meet the manufacturing requirements of high-quality work safety shoes.

[0005] Therefore, the industry urgently needs a specialized device that can effectively stretch, position, and ensure that the protective shoe heel blank is flat and fits the mold surface before shaping and pressing, so as to fundamentally improve the shaping quality of the heel. Summary of the Invention

[0006] The purpose of this invention is to provide a heel shaping machine for the production of protective shoes, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a heel shaping machine for producing protective shoes, comprising: The frame contains an operating platform. A support base is installed inside the frame and a mounting base is fixedly installed at its top. A lifting cylinder is installed between the bottom end of the support base and the operating platform inside the frame. The heel, which is mounted on top of the mounting base, serves as a mold for protecting the heel of the shoe; A shaping mold is fixedly installed inside the top of the machine frame and above the support base. An airbag membrane is fixedly installed inside the shaping mold. After the airbag membrane expands, it cooperates with the heel to complete the shaping process of the protective shoe heel. The clamps are provided in two and are fixedly installed on both sides of the support base. Each clamp has a clamp plate installed at its top. The clamp plate is designed as an arc-shaped structure corresponding to the heel of the shoe. The clamp plate is used to press the heel of the protective shoe tightly against the outside of the heel to achieve the positioning of the heel of the protective shoe.

[0008] Preferably, it also includes a support arm, which is fixedly installed on the outside of the clamping seat. The bottom end of the support arm is rotatably mounted with a clamping cylinder via a pin. The output end of the clamping cylinder is rotatably mounted with a connecting arm via a pin, and one end of the connecting arm is movably connected to the top of the outer side of the clamping seat via a pin. A fixed base is fixedly installed on the outer top of the clamping base. A movable arm is rotatably installed on the bottom end of the fixed base via a pin. A positioning arm is rotatably installed on the middle part of the movable arm via a pin. One end of the positioning arm is movably connected to the output end of the clamping cylinder via a pin. A pressure block is fixedly installed on the middle part of the positioning arm, and the pressure block is located on the outside of the movable arm. When the clamping cylinder pushes outward, it drives one end of the connecting arm and the positioning arm to move. The connecting arm and the positioning arm together drive the movable arm to rotate diagonally downward. The movable arm drives the clamping plate to rotate diagonally downward, so that the heel of the protective shoe is tightened and clamped to the outside of the heel.

[0009] Preferably, it also includes a positioning seat, which is fixedly installed at the top of the movable arm and has a threaded hole in the middle. A support rod is threadedly installed in the threaded hole in the middle of the positioning seat, and the support rod is rotatably installed on the middle of the outer side of the clamping plate through a bearing. The support rod is used to adjust the position of the clamping plate.

[0010] Preferably, it also includes an air cavity, which is located inside the air bladder membrane and is configured as a "∩" shape. When gas is injected into the air cavity, the air bladder membrane expands and deforms inward, squeezing the protective heel on the outside of the heel so that the protective heel is shaped.

[0011] Preferably, it also includes an air inlet groove, which is located at the top of the air chamber, and a connecting air nozzle is provided through the inner wall of the top of the air inlet groove for injecting compressed air.

[0012] Preferably, it also includes a film mounting groove, which is located inside the molding die, and the airbag film is mounted in the film mounting groove; The positioning hole and the positioning protrusion are provided. The positioning hole is provided through the bottom of the inner part of the film mounting groove. The positioning protrusion is fixedly installed on the bottom of the airbag film and is adapted to the positioning hole. The positioning hole and the positioning protrusion are used to limit the airbag film in the film mounting groove.

[0013] Preferably, it also includes a limiting slot and a limiting block. The limiting slot is located at the top of the mounting base, and the limiting block is fixedly installed at the bottom of the heel and adapted to the limiting slot. The limiting slot and the limiting block are both designed with a "⊥" shaped cross section. The limiting slot and the limiting block are used to fix the heel above the mounting base.

[0014] Preferably, it also includes a telescopic guide rod, which is fixedly installed between the bottom end of the support base and the operating platform inside the frame. The telescopic guide rod is used to ensure that the support base moves vertically up and down.

[0015] Preferably, the inner surface of the clamping plate is frosted.

[0016] Preferably, it also includes a mounting bracket, which is fixedly mounted on the top of the forming mold and fixedly mounted inside the frame with bolts.

[0017] The technical effects and advantages of this invention are as follows: 1. This invention uses a clamping cylinder to drive a linkage mechanism to control the pressure plate to flip downwards and clamp the protective shoe heel blank. During the flipping process, the pressure plate not only applies an inward clamping force to the protective shoe heel blank, but also applies a downward pulling force to the protective shoe heel blank. This allows the protective shoe heel blank to be fully stretched on the heel surface and fit into the heel surface, thereby avoiding the accumulation and wrinkling of the protective shoe heel blank in areas with large curvature, or the formation of uneven creases at the seams, thus effectively improving the shaping quality of the protective shoe heel. 2. This invention uses an airbag membrane with a built-in "∩"-shaped air cavity to compress and shape the protective shoe heel blank on the heel surface. After inflation, the airbag membrane can apply pressure evenly to the protective shoe heel blank from multiple directions, so that the protective shoe heel blank is subjected to uniform force and completely fits the heel, thereby ensuring that the protective shoe heel is accurately shaped after shaping and effectively improving the shaping quality of the protective shoe heel. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the support base and shaping mold structure of the present invention.

[0020] Figure 3 This is a front view of the support base and shaping mold structure of the present invention.

[0021] Figure 4 This is a schematic diagram of the mold structure of the present invention.

[0022] Figure 5 This is a schematic diagram of the airbag membrane structure of the present invention.

[0023] Figure 6 This is a schematic diagram of the heel structure of the present invention.

[0024] Figure 7 This is a schematic diagram of the support structure of the present invention.

[0025] Figure 8 This is a schematic diagram of the clamp structure of the present invention.

[0026] In the diagram: 1. Frame; 2. Support base; 3. Heel; 4. Shaping mold; 5. Clamp; 21. Mounting base; 22. Lifting cylinder; 23. Telescopic guide rod; 41. Airbag membrane; 42. Air chamber; 43. Air inlet slot; 44. Connecting nozzle; 45. Mounting bracket; 51. Clamping plate; 52. Support arm; 53. Clamping cylinder; 54. Connecting arm; 55. Fixed base; 56. Movable arm; 57. Positioning arm; 58. Pressure block; 401. Membrane mounting slot; 402. Positioning hole; 403. Positioning protrusion; 211. Limiting slot; 212. Limiting insert; 561. Positioning base; 562. Support rod. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] like Figures 1 to 8 As shown, the heel shaping machine for protective shoe production provided by the present invention is essentially a shaping machine that can ensure that no wrinkles are generated during the shaping process of the heel blank of the protective shoe.

[0029] In terms of specific structural installation, the structural body can be constructed according to the inventive concept of this embodiment. In this embodiment, no special limitations are imposed.

[0030] In this embodiment, a heel shaping machine for producing protective shoes includes: The frame 1 has an internal operating platform. The frame 1 adopts a frame structure and serves as the basic support for the entire device. Support base 2 is installed inside the frame 1 and has a mounting base 21 fixedly installed at its top. A lifting cylinder 22 is installed between the bottom end of the support base 2 and the operating platform inside the frame 1. Telescopic guide rod 23 is fixedly installed between the bottom end of support base 2 and the operating platform inside frame 1. Telescopic guide rod 23 is used to ensure that support base 2 moves vertically up and down. The heel 3 is installed above the mounting base 21. The heel 3 serves as a mold for protecting the heel of the shoe. The heel 3 can be made of aluminum alloy, epoxy resin or engineering plastic by casting or CNC machining. The limiting slot 211 and the limiting block 212 are provided. The limiting slot 211 is located at the top of the mounting base 21, and the limiting block 212 is fixedly installed at the bottom of the heel 3 and is adapted to the limiting slot 211. The cross-section of the limiting slot 211 and the limiting block 212 is set in the shape of "⊥". The limiting slot 211 and the limiting block 212 are used to fix the heel 3 above the mounting base 21. The bottom of the limiting slot 211 is provided with a rubber pad to increase the friction between it and the limiting block 212. This friction can realize the mechanical locking of the limiting slot 211 and the limiting block 212. In addition, during the heel shaping process, the heel 3 is only subjected to lateral force, which will not affect the cooperation between the limiting slot 211 and the limiting block 212. The shaping mold 4 is fixedly installed inside the top of the frame 1 and above the support base 2. An airbag membrane 41 is fixedly installed inside the shaping mold 4. After the airbag membrane 41 expands, it cooperates with the heel 3 to complete the shaping process of the protective shoe heel. The airbag membrane 41 is made of one of silicone rubber, polyurethane (PU) or special rubber. After inflation, it can expand evenly to squeeze the protective shoe heel blank from all directions. The adhesive film mounting groove 401 is located inside the shaping mold 4, and the airbag adhesive film 41 is installed in the adhesive film mounting groove 401. Positioning hole 402 and positioning protrusion 403: Positioning hole 402 is provided through the bottom of the inner part of the film mounting groove 401, and positioning protrusion 403 is fixedly installed on the bottom of the airbag film 41 and is adapted to the positioning hole 402. Positioning hole 402 and positioning protrusion 403 are used to limit the airbag film 41 in the film mounting groove 401. The air cavity 42 is located inside the air bladder membrane 41 and is designed as a "∩" shape. When gas is injected into the air cavity 42, the air bladder membrane 41 expands and deforms inward, squeezing the protective shoe heel on the outside of the heel 3 so that the protective shoe heel is shaped. An air inlet 43 is located at the top of the air chamber 42. A connecting air nozzle 44 is provided through the inner wall of the top of the air inlet 43. The connecting air nozzle 44 is used to inject compressed air. The connecting air nozzle 44 is connected to the air compressor through an air pipe to realize the supply of compressed air. Mounting bracket 45 is fixedly mounted on the top of the shaping mold 4 and fixedly mounted inside the frame 1 by bolts; Two clamps 5 are provided and fixedly installed on both sides of the support base 2. Each clamp 5 has a clamp plate 51 installed at its top. The clamp plate 51 is designed as an arc-shaped structure corresponding to the heel 3. The clamp plate 51 is used to press the heel of the protective shoe against the outside of the heel 3 to achieve the positioning of the heel of the protective shoe. The inner side of the clamp plate 51 is made of frosted surface. The clamp 5 adopts a combination structure of rigid base and deformable rubber surface layer. When it presses and positions the heel blank of the protective shoe, it undergoes a small deformation to avoid jamming of the linkage structure such as the movable arm 56. The support arm 52 is fixedly installed on the outside of the clamp 5. The bottom end of the support arm 52 is rotatably mounted with a clamping cylinder 53 via a pin. The output end of the clamping cylinder 53 is rotatably mounted with a connecting arm 54 via a pin. One end of the connecting arm 54 is movably connected to the top of the outer side of the clamp 5 via a pin. A fixed base 55 is fixedly installed on the outer top of the clamping base 5. A movable arm 56 is rotatably installed on the bottom end of the fixed base 55 via a pin. A positioning arm 57 is rotatably installed on the middle part of the movable arm 56 via a pin. One end of the positioning arm 57 is movably connected to the output end of the clamping cylinder 53 via a pin. A pressure block 58 is fixedly installed on the middle part of the positioning arm 57, and the pressure block 58 is located on the outside of the movable arm 56. When the clamping cylinder 53 pushes outward, it drives one end of the connecting arm 54 and the positioning arm 57 to move. The connecting arm 54 and the positioning arm 57 together drive the movable arm 56 to rotate diagonally downward. The movable arm 56 drives the clamping plate 51 to rotate diagonally downward, so that the heel of the protective shoe is tightened and clamped to the outside of the heel 3. The connecting arm 54 mainly converts the linear motion of the clamping cylinder 53 into a preliminary rotational motion. The positioning arm 57 is a key function switching lever. The pressure block 58 on it is designed to change the lever arm, so as to realize the conversion of the movement trajectory of the movable arm 56 from small clamping to large downward pulling. The positioning seat 561 is fixedly installed at the top of the movable arm 56 and has a threaded hole in the middle. A support rod 562 is threadedly installed in the threaded hole in the middle of the positioning seat 561. The support rod 562 is rotatably installed on the middle of the outer side of the clamping plate 51 through the bearing. The support rod 562 is used to adjust the position of the clamping plate 51.

[0031] When using the heel shaping machine for protective shoe production according to this embodiment, firstly, select the corresponding heel 3 according to the size of the protective shoe, and insert the limiting block 212 at the bottom of the heel 3 into the limiting slot 211 to complete the installation of the heel 3. Then, place the protective shoe heel blank on top of the heel 3, ensuring that the middle of the protective shoe heel blank is aligned with the middle of the top of the heel 3. Then, manually smooth the excess material on both sides of the protective shoe blank downwards along the curved surface of the heel 3, so that the protective shoe blank initially fits against the surface of the heel 3. At this time, the protective shoe heel blank is initially deformed and placed on top of the heel 3. Then, control the two clamping cylinders 53 to push out, and the two clamping cylinders 53 respectively drive the two connecting arms 54 to move upwards. The connecting arm 54 rotates upward around its connection point with the clamp 5, and simultaneously drives one end of the positioning arm 57 to move upward. During the upward rotation of the positioning arm 57, the movable arm 56 moves, causing the movable arm 56 to rotate around its bottom connection point with the fixed seat 55. At this time, the movable arm 56 drives the clamp 51 to move towards the heel 3. At this time, the clamp 51 presses the protective shoe heel blank onto the surface of the heel 3. During this process, the rotation force of the movable arm 56 comes from the rotation of the positioning arm 57. The positioning arm 57 drives the movable arm 56 to rotate through the pin at its connection point with the movable arm 56. The movable arm 56 rotates slightly to initially press the protective shoe heel blank. During this process, the protective shoe heel blank is pre-clamped. After the clamping cylinder 53 is pushed out a certain distance, the clamping plate 51 completes the initial clamping of the protective shoe heel blank. At this time, the pressure block 58 at the top of the positioning arm 57 rotates to a position that fits against the outside of the movable arm 56. At this time, the clamping cylinder 53 continues to push the positioning arm 57 to rotate. The positioning arm 57 squeezes the movable arm 56 through the pressure block 58. At this time, the force of the movable arm 56 is changed from the pin at the end of the positioning arm 57 to the squeezing of the pressure block 58 in the middle of the positioning arm 57. The lever arm from which the force of the movable arm 56 comes from changes. Correspondingly, the rotation amplitude of the movable arm 56 changes. At this time, the movable arm 56 changes from a small inward rotation to a large downward rotation. At this time, the movable arm 56 rotates a large amplitude and pulls the end of the heel blank downward so that the protective shoe heel blank is tightened along the surface of the heel 3. After the protective shoe heel blank is positioned, the lifting cylinder 22 is pushed out. The lifting cylinder 22 drives the support seat 2 and the heel 3 to move upward, so that the heel 3 and the protective shoe heel blank with its surface taut enter the shaping mold 4 together. At this time, compressed air is injected into the air chamber 42 in the air bladder membrane 41 through the connecting air nozzle 44. The air bladder membrane 41 expands under the action of compressed air. Since the outer side of the air bladder membrane 41 is restricted by the shaping mold 4, the air bladder membrane 41 can only expand inward. The inwardly expanding air bladder membrane 41 squeezes the protective shoe heel blank on the surface of the heel 3, so that the protective shoe heel blank and the surface of the heel 3 are completely attached, thereby completing the shaping process of the protective shoe heel blank. After the protective shoe heel blank is shaped, the compressed air in the airbag membrane 41 is discharged. At this time, the airbag membrane 41 recovers its deformation under the action of its own elastic potential energy. Then, the lifting cylinder 22 and the clamping cylinder 53 are controlled to retract, so as to release the protective shoe heel blank. At this point, the processing of the protective shoe heel blank is completed.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A heel setting machine for producing protective shoes, characterized by, include: The frame (1) has an operating platform inside; A support base (2) is installed inside the frame (1) and a mounting base (21) is fixedly installed at the top. A lifting cylinder (22) is installed between the bottom end of the support base (2) and the operating platform inside the frame (1). The heel (3) is mounted above the mounting base (21) and serves as a mold for protecting the heel of the shoe; A shaping mold (4) is fixedly installed at the top of the inside of the frame (1) and above the support base (2). An airbag membrane (41) is fixedly installed inside the shaping mold (4). After the airbag membrane (41) expands, it cooperates with the heel (3) to complete the shaping process of the heel of the protective shoe. The clamp (5) has two clamps and is fixedly installed on both sides of the support base (2). The top of each clamp (5) is equipped with a clamp plate (51). The clamp plate (51) is designed as an arc-shaped structure corresponding to the heel (3). The clamp plate (51) is used to press the heel of the protective shoe against the outside of the heel (3) to achieve the positioning of the heel of the protective shoe.

2. The heel shaping machine for protective shoe production according to claim 1, characterized in that Also includes: A support arm (52) is fixedly installed on the outside of the clamp (5). A clamping cylinder (53) is rotatably installed at the bottom end of the support arm (52) via a pin. A connecting arm (54) is rotatably installed at the output end of the clamping cylinder (53) via a pin. One end of the connecting arm (54) is movably connected to the top of the outside of the clamp (5) via a pin. A fixed base (55) is fixedly installed on the outer top of the clamp (5). A movable arm (56) is rotatably installed at the bottom of the fixed base (55) via a pin. A positioning arm (57) is rotatably installed in the middle of the movable arm (56) via a pin. One end of the positioning arm (57) is movably connected to the output end of the clamping cylinder (53) via a pin. A pressure block (58) is fixedly installed in the middle of the positioning arm (57), and the pressure block (58) is located on the outside of the movable arm (56). When the clamping cylinder (53) is pushed outward, it drives one end of the connecting arm (54) and the positioning arm (57) to move. The connecting arm (54) and the positioning arm (57) together drive the movable arm (56) to rotate diagonally downward. The movable arm (56) drives the clamping plate (51) to rotate diagonally downward, so that the heel of the protective shoe is tightened and clamped to the outside of the heel (3).

3. The heel shaping machine for producing protective shoes according to claim 2, characterized in that, Also includes: The positioning seat (561) is fixedly installed at the top of the movable arm (56) and has a threaded hole in the middle. A support rod (562) is threadedly installed in the threaded hole in the middle of the positioning seat (561), and the support rod (562) is rotatably installed on the middle of the outer side of the clamping plate (51) through the bearing. The support rod (562) is used to adjust the position of the clamping plate (51).

4. The heel shaping machine for producing protective shoes according to claim 1, characterized in that, Also includes: The air cavity (42) is located inside the air bladder membrane (41) and is designed as a "∩" shape. When gas is injected into the air cavity (42), the air bladder membrane (41) expands and deforms inward, squeezing the protective shoe heel on the outside of the heel (3) so that the protective shoe heel is shaped.

5. A heel shaping machine for producing protective shoes according to claim 4, characterized in that, Also includes: An air inlet groove (43) is located at the top of the air chamber (42). A connecting nozzle (44) is provided through the inner wall of the top of the air inlet groove (43). The connecting nozzle (44) is used to inject compressed air into the air chamber (42).

6. A heel shaping machine for producing protective shoes according to claim 1, characterized in that, Also includes: The film mounting groove (401) is located inside the shaping mold (4), and the airbag film (41) is installed in the film mounting groove (401); The positioning hole (402) and the positioning protrusion (403) are provided through the bottom of the inner part of the film mounting groove (401). The positioning protrusion (403) is fixedly installed on the bottom of the airbag film (41) and is adapted to the positioning hole (402). The positioning hole (402) and the positioning protrusion (403) are used to limit the airbag film (41) in the film mounting groove (401).

7. A heel shaping machine for producing protective shoes according to claim 1, characterized in that, Also includes: The limiting slot (211) and the limiting plug (212) are provided at the top of the mounting base (21) and the limiting plug (212) are fixedly installed at the bottom of the heel (3) and are adapted to the limiting slot (211). The cross-section of the limiting slot (211) and the limiting plug (212) are both set as "⊥" shape. The limiting slot (211) and the limiting plug (212) are used to fix the heel (3) above the mounting base (21).

8. A heel shaping machine for producing protective shoes according to claim 1, characterized in that, Also includes: Telescopic guide rod (23) is fixedly installed between the bottom end of the support base (2) and the operating platform inside the frame (1). The telescopic guide rod (23) is used to ensure that the support base (2) moves vertically up and down.

9. A heel shaping machine for producing protective shoes according to claim 1, characterized in that: The inner surface of the clamp (51) is frosted.

10. A heel shaping machine for producing protective shoes according to claim 1, characterized in that, Also includes: The mounting bracket (45) is fixedly installed on the top of the mold (4) and fixedly installed inside the frame (1) by bolts.

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