Shaping apparatus for upper processing

Abstract

This invention relates to shaping equipment for shoe upper processing, and belongs to the field of shoemaking equipment technology. It includes a mold moving system, a flexible mold system, a side clamping system, a heated mold core, and an air replenishment and pressure holding system. The flexible mold system is mounted on the mold moving system and has a flexible pushing surface. The air replenishment and pressure holding system includes a pressure-bearing airbag, a pressure tube, a pressure piston, and an air inlet pipe. The pressure-bearing airbag is mounted on the front end of the flexible pushing surface, and the pressure tube is mounted on the pressure-bearing airbag. The pressure-bearing airbag is connected to the pressure piston. The diameter of the side of the pressure piston closer to the pressure-bearing airbag is larger than the diameter of the side farther from the pressure-bearing airbag. The pressure tube is divided into a pressure chamber and a sensing chamber by the pressure piston. The air inlet pipe is mounted on the pressure tube. A first one-way valve is provided between the air inlet pipe and the pressure chamber, allowing one-way flow into the pressure tube. Both the pressure chamber and the sensing chamber are connected to the pressure-bearing airbag, preventing the flexible mold system from collapsing and deforming after repeated use, thus ensuring a long service life.

Description

Technical Field

[0001] This invention relates to the field of shoemaking equipment technology, and in particular to a shaping device for shoe upper processing. Background Technology

[0002] Existing shoe upper processing molding equipment typically uses rigid molds in conjunction with external air or hydraulic systems for pressurization and pressure holding. However, such equipment has significant shortcomings in practical applications. First, traditional equipment requires an external compressed air or hydraulic station, resulting in complex structure, high energy consumption, and pressure fluctuations from the air or oil source directly affecting the stability of the molding pressure. Second, during the heat molding process, the shoe upper material softens due to heat or the hot melt adhesive melts, causing slight changes in thickness. This can easily lead to a decrease in the contact pressure between the mold and the shoe upper, and existing equipment cannot automatically maintain a constant molding pressure, resulting in quality problems such as insufficient molding of the shoe upper and poor edge adhesion.

[0003] Furthermore, some equipment uses rigid push surfaces, which are difficult to adapt to shoe upper shapes with different curvatures and surfaces, easily causing localized overpressure or underpressure. In addition, the pressurization pipeline operates for extended periods in high-temperature environments, and heat conduction can easily lead to aging and failure of seals, reducing the system's airtightness and service life. Lateral clamping mechanisms are mostly fixed, unable to dynamically assist in positioning during heating, easily causing wrinkles in the shoe upper. Therefore, it is necessary to develop a shoe upper shaping device that requires no external air source, can automatically sense pressure changes and automatically replenish air, and simultaneously possesses flexible bonding and heat insulation protection functions to improve shaping quality and production efficiency. Summary of the Invention

[0004] To overcome the technical defects of the existing technology, the present invention provides a shaping equipment for shoe upper processing, which realizes flexible extrusion and has a long service life.

[0005] The technical solution adopted in this invention is: A shaping device for shoe upper processing includes a mold moving system, a flexible mold system, a side clamping system, a heating mold core, and an air replenishment and pressure holding system. The flexible mold system is mounted on the mold moving system. The air replenishment and pressure holding system has a flexible pushing surface and includes a pressure-bearing airbag, a pressure tube, a pressure piston, and an air inlet pipe. The pressure-bearing airbag is mounted on the flexible mold system, and its front end forms the front end of the flexible pushing surface. The pressure tube is mounted on the pressure-bearing airbag, and the pressure piston slides within the pressure tube. The pressure-bearing airbag is connected to the pressurization tube. The diameter of the side of the pressurization piston closer to the pressure-bearing airbag is larger than the diameter of the side farther from the pressure-bearing airbag. The pressurization tube is divided into a pressurization chamber and a sensing chamber by the pressurization piston. The air inlet pipe is installed on the pressurization tube. A first one-way valve is provided between the air inlet pipe and the pressurization chamber, allowing gas to flow unidirectionally into the pressurization tube. The pressurization chamber is connected to the pressure-bearing airbag through an air injection pipe. The sensing chamber is connected to the pressure-bearing airbag. A second one-way valve is installed in the air injection pipe, which allows gas in the pressurization chamber to flow unidirectionally into the pressure-bearing airbag.

[0006] Preferably, the mold moving system includes a mold moving motor, a mold moving rail, and a mold slider. The mold slider slides along the mold moving rail, and the mold moving motor is connected to the mold slider via a lead screw.

[0007] Preferably, the flexible mold system includes a flexible extrusion block, a support plate, an adjusting rod, and a bearing spring. The flexible extrusion block is mounted on the support plate, the air replenishment and pressure holding system is mounted on the flexible extrusion block, and the adjusting rod is connected to a preset reference plate on the mold moving system via a threaded pair. The adjusting rod pushes against the support plate, and the two ends of the bearing spring press against the support plate and the reference plate, respectively.

[0008] Preferably, the side clamping system includes two clamping plates, each of which moves in the direction pointing toward the heated mold core, and the two clamping plates are driven by pneumatic grippers.

[0009] Preferably, the heating mold core is provided with a resistance wire.

[0010] Preferably, the pressure tube is provided with heat sink.

[0011] Preferably, a sealing ring is provided between the pressurizing piston and the pressurizing tube.

[0012] Preferably, the pressure-bearing airbag is equipped with a pressure relief valve.

[0013] The beneficial effects of this invention are: Achieving self-feedback dynamic air replenishment and constant pressure setting, eliminating dependence on external air sources: By setting up an air replenishment and pressure maintenance system, and using a pressure piston to divide the pressure pipe into a pressure chamber and a sensing chamber, combined with the unidirectional flow characteristics of the first and second one-way valves, a fully enclosed self-feedback pneumatic circuit is constructed. During the mold closing and extrusion process, the air pressure change in the pressure-bearing airbag can be transmitted to the sensing chamber in real time and drive the pressure piston to slide. Utilizing the diameter difference on both sides of the piston to generate a pressure amplification effect, external air is automatically drawn into the pressure chamber through the air inlet pipe, and then replenished into the pressure-bearing airbag through the air injection pipe, thereby achieving dynamic compensation for the setting pressure. This structure can automatically maintain a constant setting pressure without the need for external compressed air or a hydraulic station, reducing the pressure drop problem caused by air source fluctuations or changes in hot melt adhesive thickness in traditional equipment, and improving the stability and uniformity of the setting quality.

[0014] Improving the fit and shaping quality of complex curved shoe uppers: A pressure-bearing airbag is used as a flexible push surface, replacing the traditional rigid mold push method. During the mold closing process, the pressure-bearing airbag can adaptively deform flexibly according to the curvature and shape of the shoe upper, ensuring even pressure distribution across all areas of the upper. This avoids localized over- or under-pressure caused by rigid compression, while also reducing poor edge fit and wrinkles. It is particularly suitable for processing shoe uppers with multiple curved surfaces and complex structures, improving the tightness of the fit between the upper and the heated mold core, and enhancing the shaping effect.

[0015] Compact structure, low energy consumption, and easy maintenance: The air intake pipe is directly connected to the atmosphere, using ambient air as the sole air source. No external compressed air pipelines or hydraulic stations are required, simplifying the overall equipment structure and reducing manufacturing costs and operating energy consumption. Meanwhile, the mold movement system uses a motor-driven lead screw, combined with adjusting rods and load-bearing springs in the flexible mold system, enabling control of the mold closing stroke and flexible buffering, facilitating operation and maintenance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the gas replenishment and pressure maintenance system.

[0018] Explanation of reference numerals in the attached figures: 1. Mold moving system; 11. Mold moving motor; 12. Mold moving rail; 13. Mold slider; 15. Reference plate; 2. Flexible mold system; 21. Flexible extrusion block; 22. Support plate; 23. Adjusting rod; 25. Bearing spring; 3. Side clamping system; 31. Clamping plate; 32. Pneumatic gripper; 4. Heating the mold core; 5. Air replenishment and pressure maintenance system; 51. Pressure-bearing airbag; 52. Pressurization pipe; 521. Pressurization chamber; 522. Sensing chamber; 53. Pressurization piston; 54. Air inlet pipe; 541. First one-way valve; 55. Air injection pipe; 551. Second one-way valve. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings: like Figure 1 — Figure 2 As shown, this embodiment provides a shaping device for shoe upper processing, including a mold moving system 1, a flexible mold system 2, a side clamping system 3, a heating mold core 4, and an air replenishment and pressure holding system 5. The flexible mold system 2 and the heating mold core 4 squeeze each other to shape the shoe upper. The flexible mold system 2 is installed on the mold moving system 1, so that the flexible mold system 2 can move precisely with the mold moving system 1 to complete the mold closing and opening actions between the heating mold core 4 and the air replenishment and pressure holding system 5. The air replenishment and pressure holding system 5 has a flexible pushing surface, which adaptively conforms to different curved surfaces of the shoe upper during mold closing to avoid hard impact and excessive local pressure.

[0020] Specifically, the air replenishment and pressure maintenance system 5 includes a pressure-bearing airbag 51, a pressurizing pipe 52, a pressurizing piston 53, and an air inlet pipe 54. The pressure-bearing airbag 51 is mounted on the flexible mold system 2, and its front end forms a flexible pushing surface. Here, the front end refers to the end closest to the heated mold core 4. The air replenishment and pressure maintenance system 5, through the cooperation of the pressurizing pipe 52 and the pressurizing piston 53, constructs a closed air circuit system that can automatically adjust and maintain pressure without an external air source. The pressurizing pipe 52 is mounted on the pressure-bearing airbag 51, and the pressurizing piston 53 is slidably disposed within the pressurizing pipe 52. The pressure-bearing airbag 51 is connected to the pressurization pipe 52, which directly transmits the pressure change of the pressure-bearing airbag 51 to the pressurization piston 53, providing a power source for automatic air replenishment. That is, after the pressure-bearing airbag 51 is pressurized, the air pressure inside the pressure-bearing airbag 51 pushes the pressurization piston 53 to slide, realizing automatic air replenishment. The diameter of the side of the pressurization piston 53 closer to the pressure-bearing airbag 51 is larger than the diameter of the side farther away from the pressure-bearing airbag 51. The area difference generates a pressure amplification effect, which makes the air pressure inside the pressure-bearing airbag 51 drive the pressurization piston 53 to move, realizing automatic air intake and air replenishment when pressure fluctuates.

[0021] Specifically, the pressurizing pipe 52 is divided into a pressurizing chamber 521 and a sensing chamber 522 by the pressurizing piston 53, forming two independent air chambers. The sensing chamber 522 is used to sense the pressure of the pressure-bearing airbag 51, and the pressurizing chamber 521 is used to pressurize and release compensation gas. An air inlet pipe 54 is installed on the pressurizing pipe 52. A first one-way valve 541 is provided between the air inlet pipe 54 and the pressurizing chamber 521 to ensure that gas can only enter the pressurizing chamber 521 from the outside, preventing reverse gas leakage, and realizing... The system features unidirectional air intake. The pressurization chamber 521 is connected to the pressure-bearing airbag 51 via the air injection pipe 55, and the sensing chamber 522 is also connected to the pressure-bearing airbag 51. A second one-way valve 551 is installed inside the air injection pipe 55. The second one-way valve 551 allows the gas in the pressurization chamber 521 to flow unidirectionally to the pressure-bearing airbag 51, ensuring that the air pressure in the pressurization chamber 521 and the sensing chamber 522 is always related to the pressure in the pressure-bearing airbag 51. This forms a complete self-feedback pneumatic circuit, preventing the flexible mold system 2 from collapsing and deforming after repeated use, thus extending its service life.

[0022] The air replenishment process and principle of this air replenishment and pressure holding system 5 are as follows: The mold moving system 1 moves the pressure-bearing airbag 51 closer to and squeezes the heated mold core 4, increasing the air pressure inside the pressure-bearing airbag 51 and pushing the pressure piston 53 to slide upward. Because the diameter of the side of the pressure piston 53 closer to the pressure-bearing airbag 51 is larger than the diameter of the side farther from the pressure-bearing airbag 51, a greater pressure is generated on the side of the pressure piston 53 farther from the pressure-bearing airbag 51 when it slides upward. Under the restriction of the first one-way valve 541 and the second one-way valve 551, each time the pressure-bearing airbag 51 completes... After the entire process of approaching and squeezing the heated mold core 4 for shaping, and then separating from the heated mold core 4, air will flow through the first one-way valve 541 to the pressurizing chamber 521, and through the second one-way valve 551 to the pressure-bearing airbag 51, thereby dynamically replenishing the air in the pressure-bearing airbag 51. The pressure-bearing airbag 51 is equipped with a pressure relief valve to prevent the pressure-bearing airbag 51 from over-inflating after unlimited air replenishment. When the pressure-bearing airbag 51 separates from the workpiece, the pressurizing piston 53 descends under its own weight, drawing the outside air from the first one-way valve 541 into the pressurizing chamber 521.

[0023] Specifically, the mold moving system 1 includes a mold moving motor 11, a mold moving rail 12, and a mold slider 13. The mold slider 13 slides along the mold moving rail 12. The mold moving motor 11 is connected to the mold slider 13 via a lead screw. The mold moving motor 11 drives the lead screw to achieve high-precision and stable linear reciprocating motion, thereby controlling the mold closing position and speed.

[0024] Specifically, the flexible mold system 2 includes a flexible extrusion block 21, a support plate 22, an adjusting rod 23, and a bearing spring 25. The flexible extrusion block 21 is installed on the support plate 22, and the air replenishment and pressure holding system 5 is installed on the flexible extrusion block 21. The adjusting rod 23 is connected to the preset reference plate 15 on the mold moving system 1 through a threaded pair. The adjusting rod 23 pushes the support plate 22, and the two ends of the bearing spring 25 press on the support plate 22 and the reference plate 15 respectively. The horizontal position of the support plate 22 can be finely adjusted by adjusting the thread of the adjusting rod 23. The bearing spring 25 provides elastic preload, so that the flexible extrusion block 21 can fit evenly and buffer the impact.

[0025] Specifically, the side clamping system 3 includes two clamping plates 31. Each clamping plate 31 moves towards the heating mold core 4 in the direction of the heating mold core 4, clamping the edge of the shoe upper from both sides of the heating mold core 4 toward the center to prevent slippage or wrinkling during the heating and pressurization process. The two clamping plates 31 are driven by pneumatic grippers 32.

[0026] Specifically, the heating mold core 4 is equipped with a resistance wire to provide controllable resistance heating, so that the surface of the heating mold core 4 reaches the required shaping temperature, activating the hot melt adhesive or softening material of the shoe upper.

[0027] Specifically, the pressure pipe 52 is equipped with heat sinks to accelerate heat dissipation, reduce the high temperature generated by air compression and conduct it to the sealing ring of the pressure piston 53, thus ensuring sealing performance and system stability.

[0028] Specifically, a sealing ring is provided between the pressurizing piston 53 and the pressurizing pipe 52 to enhance airtightness, prevent compressed gas from leaking from the gap between the piston and the pipe wall, and ensure that the automatic air replenishment action is accurate and reliable.

[0029] Specifically, the intake pipe 54 is connected to the atmosphere, using the atmosphere as the sole air source, eliminating the need for external compressed air, simplifying the structure and reducing energy consumption.

[0030] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A shaping equipment for shoe upper processing, characterized in that, The system includes a mold moving system, a flexible mold system, a side clamping system, a heated mold core, and an air replenishment and pressure holding system. The flexible mold system is mounted on the mold moving system. The air replenishment and pressure holding system has a flexible pushing surface and includes a pressure-bearing airbag, a pressure pipe, a pressure piston, and an air inlet pipe. The pressure-bearing airbag is mounted on the flexible mold system, and its front end forms the front end of the flexible pushing surface. The pressure pipe is mounted on the pressure-bearing airbag, and the pressure piston slides within the pressure pipe. The pressure-bearing airbag and... The pressurization pipe is connected, and the diameter of the side of the pressurization piston closer to the pressure-bearing airbag is larger than the diameter of the side farther from the pressure-bearing airbag. The pressurization pipe is divided into a pressurization chamber and a sensing chamber by the pressurization piston. The air inlet pipe is installed on the pressurization pipe. A first one-way valve is provided between the air inlet pipe and the pressurization chamber, allowing gas to flow unidirectionally into the pressurization pipe. The pressurization chamber is connected to the pressure-bearing airbag through an air injection pipe. The sensing chamber is connected to the pressure-bearing airbag. A second one-way valve is installed in the air injection pipe, which allows gas in the pressurization chamber to flow unidirectionally into the pressure-bearing airbag.

2. The shaping equipment for shoe upper processing according to claim 1, characterized in that, The mold moving system includes a mold moving motor, a mold moving rail, and a mold slider. The mold slider slides along the mold moving rail, and the mold moving motor is connected to the mold slider via a lead screw.

3. The shaping equipment for shoe upper processing according to claim 1, characterized in that, The flexible mold system includes a flexible extrusion block, a support plate, an adjusting rod, and a bearing spring. The flexible extrusion block is mounted on the support plate, and the air replenishment and pressure holding system is mounted on the flexible extrusion block. The adjusting rod is connected to a preset reference plate on the mold moving system via a threaded pair. The adjusting rod pushes against the support plate, and the two ends of the bearing spring press against the support plate and the reference plate, respectively.

4. The shaping equipment for shoe upper processing according to claim 1, characterized in that, The side clamping system includes two clamping plates, each of which moves in the direction pointing toward the heated mold core, and the two clamping plates are driven by pneumatic grippers.

5. The shaping equipment for shoe upper processing according to claim 1, characterized in that, The heating mold core is equipped with a resistance wire.

6. The shaping equipment for shoe upper processing according to claim 1, characterized in that, The pressure tube is equipped with heat sinks.

7. The shaping equipment for shoe upper processing according to claim 1, characterized in that, A sealing ring is provided between the pressurizing piston and the pressurizing tube.

8. The shaping equipment for shoe upper processing according to claim 1, characterized in that, The pressure-bearing airbag is equipped with a pressure relief valve.

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