Vacuum heat treatment equipment for producing safety toe cap

Abstract

The utility model discloses vacuum heat treatment equipment for producing a safe toe cap, which comprises a vacuum furnace body, a vacuum chamber is arranged in the vacuum furnace body, and a furnace cover which is assembled with the vacuum furnace body in a sealing manner is arranged at the top of the vacuum furnace body in an openable and closable manner, the vacuum furnace body is connected with a vacuum pump arranged on the outer side wall of the vacuum furnace body through a vacuumizing connector formed in the side wall. A liftable lifting mechanism is arranged at the bottom in the vacuum chamber, a rotatable rotating mechanism used for placing a toe cap is arranged on the lifting mechanism, and a pressing mechanism matched with the rotating mechanism to clamp the toe cap is arranged on the rotating mechanism; a plurality of groups of electric heating wires which are arranged up and down and cooling pipes which are arranged alternately with the electric heating wires are arranged on the side wall of the vacuum chamber in the circumferential direction, spray heads which spray water to the toe caps are arranged on the cooling pipes at intervals, and the cooling pipes are further connected with a water pump arranged on the outer side wall of the vacuum furnace body through communicated water inlet pipes. The heat treatment device can improve the heat treatment quality of the safety toe cap.

Description

Technical Field

[0001] This utility model relates to the field of safety shoe toe production technology, specifically to a vacuum heat treatment device for producing safety shoe toes. Background Technology

[0002] Safety shoes, as an important protective gear to ensure the safety of workers' feet in the work environment, have a particularly crucial safety feature in the toe area. For example... Figure 1 As shown, the toe cap must have sufficient impact and pressure resistance, and is generally made of carbon steel or alloy steel to cope with accidents such as falling heavy objects or heavy objects pressing on the feet, effectively protecting the feet from injury. However, existing heat treatment equipment has many shortcomings in the production process of safety shoe toes.

[0003] On the one hand, traditional heat treatment equipment struggles to achieve uniform heating, leading to variations in material properties across different parts of the shoe toe, thus affecting the overall stability of its impact and compression resistance. On the other hand, in the cooling process, insufficient precision in control can result in either excessively rapid cooling causing cracks or excessively slow cooling leading to substandard performance. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a vacuum heat treatment device for producing safety shoe toes, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0006] A vacuum heat treatment device for producing safety shoe toes includes a vacuum furnace body with a vacuum chamber inside. The top of the furnace body has an openable and closable furnace cover that is sealed to the furnace body. The furnace body is connected to a vacuum pump located on the outer wall of the furnace body via a vacuum port on its side wall. A lifting mechanism is located at the bottom of the vacuum chamber, and the lifting mechanism has a rotating mechanism for placing and rotating the shoe toes. The rotating mechanism has a clamping mechanism that cooperates with the rotating mechanism to hold the shoe toes. The vacuum chamber has a pressing mechanism; several sets of electric heating wires arranged vertically on the side wall for heating the shoe toe and cooling pipes arranged alternately with the electric heating wires for water cooling the heated shoe toe. The cooling pipes are spaced apart with nozzles that spray water at the shoe toe. The cooling pipes are also connected to a water pump located on the outer wall of the vacuum furnace body through a connected water inlet pipe; the vacuum furnace body is equipped with a PLC controller, and the output terminal of the PLC controller is connected to the controlled terminals of the lifting mechanism, rotating mechanism, pressing mechanism, electric heating wires, water pump and vacuum pump respectively.

[0007] Preferably, the lifting mechanism includes a vertically arranged electric lifting rod with the push rod facing upwards, and a horizontally arranged lifting box is provided at the top of the push rod of the electric lifting rod; the rotating mechanism includes a rotary motor disposed in the lifting box, the rotating shaft of the rotary motor passing through the center of the top of the lifting box and connected to a rotating platform, and the upper surface of the rotating platform having a plurality of slots uniformly formed along the circumference to fit the bottom of the shoe toe and for insertion into the bottom of the shoe toe; the output terminal of the PLC controller is respectively connected to the controlled terminals of the electric lifting rod and the rotary motor.

[0008] Preferably, the top of the lifting box is provided with a circular guide rail, and a number of rollers that travel on the circular guide rail are evenly arranged along the circumferential edge of the lower surface of the rotating table.

[0009] Preferably, the clamping mechanism includes a clamping electric push rod erected on the middle of the upper surface of the rotary table. The push rod of the clamping electric push rod is arranged upward and connected to a horizontally arranged pressure plate for moving away from and towards the rotary table under the drive of the clamping electric push rod. The output end of the PLC controller is connected to the controlled end of the clamping electric push rod.

[0010] Preferably, the pressure plate includes a base arranged in an array and corresponding to each slot. The outer end of the base is provided with a pressing part for pressing the top of the shoe toe from the corresponding slot. The lower surface of the pressing part is provided with an anti-slip rubber strip that directly contacts the top of the shoe toe.

[0011] Preferably, a vent is provided on the side wall of the vacuum furnace body, and a vent valve is provided on the vent to control the opening and closing of the vent. The controlled end of the vent valve is connected to the output end of the PLC controller.

[0012] Preferably, the vacuum chamber is equipped with a temperature sensor for monitoring the temperature inside the vacuum chamber and a vacuum gauge for monitoring the vacuum level inside the vacuum chamber. The output terminals of the vacuum gauge and the temperature sensor are respectively connected to the input terminal of the PLC controller.

[0013] Preferably, a drain outlet is provided on the bottom side wall of the vacuum furnace body, and a drain valve for opening and closing the drain outlet is provided on the drain outlet. The controlled end of the drain valve is connected to the output end of the PLC controller.

[0014] The technological advancements achieved by this utility model are as follows, due to the adoption of the above technical solutions.

[0015] This invention provides uniform heating and cooling: by setting multiple electric heating wires on the side wall of the vacuum chamber and distributing them circumferentially, uniform heating of the shoe toe from multiple directions can be achieved; the cooling pipes and electric heating wires are arranged alternately, and the nozzles are distributed at intervals, which can ensure uniform cooling and improve the heat treatment quality of the shoe toe.

[0016] This utility model provides a secure shoe toe clamping mechanism: the shoe toe is placed in the slot of the rotating table and pressed by the clamping mechanism through the pressure plate. The pressing part has anti-slip rubber strips, which can effectively prevent the shoe toe from moving during heating and cooling, ensuring the stability of the heat treatment process.

[0017] This invention enhances the uniformity of processing through rotational motion: a rotary motor drives a rotating table to rotate, keeping the shoe toe in motion during heating and cooling, which can prevent local overheating or undercooling and further improve the uniformity of processing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an existing safety shoe toe.

[0019] Figure 2 This is a schematic diagram of the structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the rotating table structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the pressure plate structure of this utility model.

[0022] The components are: 1. Vacuum furnace body, 2. Vacuum chamber, 3. Furnace cover, 4. Lifting electric push rod, 5. Lifting box, 6. Rotary motor, 7. Rotary table, 71. Slot, 8. Roller, 9. Circular guide rail, 10. Pressing electric push rod, 11. Pressure plate, 111. Base, 112. Pressing part, 113. Anti-slip rubber strip, 12. Electric heating wire, 13. Cooling pipe, 14. Nozzle, 15. Water pump, 16. Vacuum interface, 17. Vacuum pump, 18. Breathing port, 19. Drain outlet, 20. Water inlet pipe. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] A vacuum heat treatment device for producing safety shoe toes, combined with Figure 2 As shown, the system includes a vacuum furnace body 1, with a vacuum chamber 2 inside the vacuum furnace body 1; a furnace cover 3 is provided on the top of the vacuum furnace body 1, with one end of the furnace cover 3 pivotally connected to the vacuum furnace body 1 and the other end connected to the lock of the vacuum furnace body 1, thereby realizing the opening and closing of the furnace cover 3, and the furnace cover 3 is sealed and assembled with the vacuum furnace body 1 after being closed, providing a basis for the formation of a vacuum environment.

[0025] Several sets of electric heating wires 12 and several sets of cooling pipes 13 are arranged circumferentially on the side wall of the vacuum chamber 2. These sets of electric heating wires 12 and cooling pipes 13 are arranged vertically and alternately. The electric heating wires 12 are used to heat the shoe toe in a vacuum environment, generating heat through resistance heating. This heat is transferred to the shoe toe in the form of thermal radiation, thus achieving the heating function. To meet the requirements of different shoe toe materials and processes, the heating power of the electric heating wires 12 can be controlled by adjusting the voltage or other methods to achieve the ideal heating temperature and heating speed. The cooling pipes 13 are used to water-cool the heated shoe toe. Specifically, the cooling pipes 13 are connected to a water pump 15 via a connected water inlet pipe 20. The water pump 15 is located on the outer wall of the vacuum furnace body 1 and is connected to an external water source to pump cooling water into the cooling pipes 13. The cooling pipe 13 is provided with nozzles 14 at intervals. The nozzles 14 are positioned to be aimed at the toe of the shoe. The cooling water pumped into the cooling pipe 13 is sprayed out through the nozzles 14 and sprayed onto the toe of the shoe to achieve water cooling of the toe of the shoe.

[0026] A drain port 19 is provided on the bottom side wall of the vacuum furnace body 1. A drain valve is provided on the drain port 19. The drain port 19 can be opened and closed by the drain valve, so that the cooling water can be discharged.

[0027] The side wall of the vacuum furnace body 1 is provided with a vacuum port 16. The vacuum furnace body 1 is connected to a vacuum pump 17 through the vacuum port 16. The vacuum pump 17 is located on the outer side wall of the vacuum furnace body 1. The vacuum pump 17 is used to evacuate the vacuum furnace body 1 so that the vacuum chamber 2 can reach and maintain the required vacuum level. This is crucial for heat treatment of safety shoe toes in a vacuum environment, which can avoid oxidation and other problems and improve the quality of the shoe toes.

[0028] A viewing window is provided on the side wall of the vacuum furnace body 1, which allows operators to observe the condition of the vacuum chamber 2 at any time during the heat treatment process without frequently opening the furnace cover 3, reducing heat loss and environmental interference, and helping to improve production efficiency and safety. At the same time, a breather 18 is also provided on the side wall of the vacuum furnace body 1, and a breather valve is provided on the breather 18. The breather valve can open and close the breather 18 as needed to adjust the vacuum level of the vacuum chamber 2 at specific stages to adapt to different heat treatment process requirements.

[0029] A temperature sensor and a vacuum gauge are installed in the vacuum chamber 2. The temperature sensor is used to monitor the temperature inside the vacuum chamber 2, and the vacuum gauge is used to monitor the vacuum level inside the vacuum chamber 2.

[0030] The bottom of the vacuum chamber 2 is equipped with a lifting mechanism that can be raised and lowered. Specifically, the lifting mechanism includes three vertically arranged electric lifting rods 4. The three electric lifting rods 4 are arranged in a triangle and all the rods are set upwards. A lifting box 5 is set on the top of the rods of the three electric lifting rods 4. The lifting box 5 is set horizontally and is raised and lowered under the drive of the electric lifting rods 4. The triangular arrangement of the three electric lifting rods 4 can provide stable support and drive for the lifting box 5, ensuring its stability during the lifting process.

[0031] The lifting mechanism includes a rotating mechanism for holding and rotating the shoe toe, ensuring even heating during heat treatment and preventing uneven performance due to localized overheating. Specifically, the rotating mechanism includes a rotary motor 6 housed within the lifting box 5, with its rotating shaft extending from the top center of the lifting box 5 and connecting to a rotating platform 7. The rotating platform 7 rotates under the drive of the rotary motor 6. Simultaneously, a circular guide rail 9 is provided on the top of the lifting box 5, and several rollers 8 are evenly arranged circumferentially along the lower edge of the rotating platform 7. These rollers 8 travel within the circular guide rail 9. During the rotation of the rotating platform 7, the rollers 8 and the circular guide rail 9 cooperate to provide reliable support, reducing swaying and vibration during rotation; and to lower rotational resistance, resulting in smoother and more stable rotation, further improving the uniformity of shoe toe heating and the stability of equipment operation. As shown in Figure 3, the upper surface of the rotating platform 7 is evenly provided with several slots 71 along the circumference. The slots 71 are adapted to the bottom of the shoe toe and are used to insert the bottom of the shoe toe, so as to play a preliminary positioning role for the shoe toe.

[0032] A clamping mechanism is provided on the rotating mechanism, which cooperates with the rotating mechanism to clamp the shoe toe. Specifically, the clamping mechanism includes a clamping electric push rod 10, which is erected in the middle of the upper surface of the rotating table 7. The push rod of the clamping electric push rod 10 is set upward and connected to a pressure plate 11. The pressure plate 11 is set horizontally. When the push rod of the clamping electric push rod 10 is retracted, the pressure plate 11 moves downward and closer to the rotating table 7, and the pressure plate 11 cooperates with the slot 71 to clamp the shoe toe. When it is necessary to release the shoe toe, the push rod extends, driving the pressure plate 11 away from the rotating table 7, thereby enabling convenient and quick clamping and releasing operations on the shoe toe placed on the rotating table 7.

[0033] like Figure 4As shown, the pressure plate 11 includes bases 111 arranged in an array and corresponding one-to-one with slots 71. A pressing part 112 is provided at the outer end of each base 111. When the pressure plate 11 descends and approaches the rotating table 7, the pressing part 112, corresponding to the top of the shoe toe located in the slot 71, applies pressure to the shoe toe through direct contact, firmly pressing the shoe toe onto the rotating table 7. To avoid damage to the shoe toe surface during clamping, an anti-slip strip 113 is specially provided on the lower surface of the pressing part 112. The anti-slip strip 113 increases the friction on the shoe toe, effectively preventing the shoe toe from moving due to equipment vibration or other factors during heating and cooling, ensuring the stability of the heat treatment process; furthermore, its soft material properties reduce scratches and wear on the shoe toe surface.

[0034] A PLC controller is installed on the vacuum furnace body 1. The PLC controller is used to realize the automatic control of the heat treatment process of the equipment. Specifically, the output terminal of the PLC controller is connected to the output terminals of the vacuum gauge and the temperature sensor respectively. The output terminal of the PLC controller is connected to the controlled terminals of the lifting electric push rod 4 of the lifting mechanism, the rotary motor 6 of the rotating mechanism, the pressing electric push rod 10 of the pressing mechanism, the electric heating wire 12, the water pump 15, the vacuum pump 17, the drain valve and the breather valve respectively.

[0035] The working principle of this utility model is as follows:

[0036] The shoe toe to be processed is placed in the corresponding slot 71 on the upper surface of the rotary table 7. The electric push rod 10 is pressed down and retracted, causing the pressing part 112 of the pressure plate 11 to press down on the top of the shoe toe. The electric push rod 4 is retracted, and the furnace cover 3 is closed. The vacuum pump 17 is started, and the air in the vacuum chamber 2 is extracted through the vacuum port 16 to achieve and maintain a specific vacuum level to prevent oxidation of the shoe toe. Then, the PLC controller controls the electric heating wire 12 to generate heat, which is transferred to the shoe toe in the form of thermal radiation to raise its temperature.

[0037] During the heating process, the rotary motor 6 drives the rotary table 7 to rotate the shoe toe, ensuring even heating. Simultaneously, the operator can observe the process through a viewing window. After heating is complete, the water pump 15 pumps water through the inlet pipe 20 into the cooling pipe 13. The cooling water is then sprayed onto the shoe toe via the nozzle 14 for water cooling, and the cooled water is discharged from the drain outlet 19.

[0038] Throughout the heat treatment process, temperature sensors monitor the temperature inside vacuum chamber 2 in real time, and vacuum gauges monitor the vacuum level, feeding the data back to the PLC controller. Based on the feedback, the PLC controller precisely controls the operation of each component to ensure that the temperature, vacuum level, and processing flow meet the requirements, ultimately completing the high-quality heat treatment of the safety shoe toe.

Claims

1. A vacuum heat treatment device for producing safety shoe toes, comprising a vacuum furnace body (1), a vacuum chamber (2) disposed inside the vacuum furnace body (1), and a furnace cover (3) that is openable and closable and sealed to the vacuum furnace body (1), characterized in that: The vacuum furnace body (1) is connected to a vacuum pump (17) for evacuating the vacuum furnace body (1) via a vacuum port (16) on the side wall; a lifting mechanism is provided at the bottom of the vacuum chamber (2), and a rotating mechanism is provided on the lifting mechanism for placing and rotating the shoe toe, and a clamping mechanism is provided on the rotating mechanism to clamp the shoe toe; several sets of electric heating wires (12) arranged vertically and vertically for heating the shoe toe are arranged along the side wall of the vacuum chamber (2). And a cooling pipe (13) is alternately arranged with the electric heating wire (12) for water cooling of the heated shoe toe. The cooling pipe (13) is provided with nozzles (14) that spray water at intervals toward the shoe toe. The cooling pipe (13) is also connected to a water pump (15) set on the outer wall of the vacuum furnace body (1) through a connected water inlet pipe (20). The vacuum furnace body (1) is provided with a PLC controller. The output end of the PLC controller is connected to the controlled ends of the lifting mechanism, rotating mechanism, pressing mechanism, electric heating wire (12), water pump (15) and vacuum pump (17) respectively.

2. A vacuum heat treatment apparatus for producing a safety toe according to claim 1, wherein: The lifting mechanism includes a vertically arranged electric lifting rod (4) with the push rod facing upwards, and a horizontally arranged lifting box (5) is provided at the top of the push rod of the electric lifting rod (4); the rotating mechanism includes a rotary motor (6) provided in the lifting box (5), and the rotating shaft of the rotary motor (6) passes through the center of the top of the lifting box (5) and is connected to a rotating platform (7). The upper surface of the rotating platform (7) is evenly provided with several slots (71) that are adapted to the bottom of the shoe toe and are used to insert into the bottom of the shoe toe; the output end of the PLC controller is connected to the controlled end of the electric lifting rod (4) and the rotary motor (6) respectively.

3. A vacuum heat treatment apparatus for producing a safety toe according to claim 2, wherein: The top of the lifting box (5) is provided with a circular guide rail (9), and the lower surface edge of the rotating table (7) is provided with a number of rollers (8) that travel in the circular guide rail (9) in a circumferential manner.

4. The vacuum heat treatment apparatus for manufacturing a safety toe according to claim 2, wherein: The clamping mechanism includes a clamping electric push rod (10) erected in the middle of the upper surface of the rotary table (7). The push rod of the clamping electric push rod (10) is set upward and connected to a horizontally set pressure plate (11) for moving away from and closer to the rotary table (7) under the drive of the clamping electric push rod (10). The output end of the PLC controller is connected to the controlled end of the clamping electric push rod (10).

5. A vacuum heat treatment apparatus for producing a safety toe according to claim 4, wherein: The pressure plate (11) includes a base (111) arranged in an array and corresponding to the slots (71) one by one. The outer end of the base (111) is provided with a pressing part (112) for pressing the shoe toe from the top of the shoe toe in the corresponding slot (71). The lower surface of the pressing part (112) is provided with an anti-slip rubber strip (113) that is in direct contact with the top of the shoe toe.

6. The vacuum heat treatment equipment for producing safety shoe toes according to claim 1, characterized in that: The vacuum furnace body (1) has a vent (18) on its side wall. A vent valve is provided on the vent (18) to control the opening and closing of the vent (18). The controlled end of the vent valve is connected to the output end of the PLC controller.

7. The vacuum heat treatment apparatus for manufacturing a safety toe according to claim 1, wherein: The vacuum chamber (2) is equipped with a temperature sensor for monitoring the temperature inside the vacuum chamber (2) and a vacuum gauge for monitoring the vacuum level inside the vacuum chamber (2). The output terminals of the vacuum gauge and the temperature sensor are respectively connected to the input terminal of the PLC controller.

8. The vacuum heat treatment apparatus for manufacturing a safety toe according to claim 1, wherein: The bottom side wall of the vacuum furnace body (1) is provided with a drain port (19), and a drain valve is provided on the drain port (19) for opening and closing the drain port (19). The controlled end of the drain valve is connected to the output end of the PLC controller.

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