3D upper vacuum laminating machine with positive pressure system

Abstract

This invention relates to the field of molding equipment technology, specifically to a 3D shoe upper vacuum bonding machine with a positive pressure system. The machine includes a machine base with an X-axis translation component. A feeding fixture that moves along the X-axis is mounted on the X-axis translation component. The feeding fixture is used to place the shoe material to be processed. The X-axis translation component also includes a heating component and an air positive pressure component, used to heat the shoe material on the feeding fixture and apply air pressure, respectively. The feeding fixture is also connected to a negative pressure system for vacuum negative pressure operation. This invention solves the pain points of existing shoe material composite processing, such as severe glue overflow, finished product hardening, and delamination. It achieves glue-free processing, a mass production yield of over 98%, improves substrate peel strength by 40%, preserves the elastic properties of the adhesive, adapts to the rapid iteration and flexible production of shoe materials, simultaneously protects equipment components from heat damage, reduces maintenance costs, and is suitable for large-scale processing scenarios of athletic and casual shoe uppers.

Description

Technical Field

[0001] This invention relates to the field of molding equipment technology, and specifically to a 3D shoe upper vacuum bonding machine with a positive pressure system. Background Technology

[0002] Currently, the uppers of athletic and casual shoes are generally made of fabric and leather composite colloids, relying on TPU materials to improve the waterproofness, structural support, and three-dimensional appearance of the uppers.

[0003] There are two existing traditional processing techniques. The first is the planar hot-press bonding process, which directly uses a hot-press mold to extrude the colloid to the shoe upper substrate at high temperature. The processing method is simple, but high-temperature extrusion can easily cause the molten TPU to overflow, resulting in serious glue overflow defects. Afterwards, manual sanding and trimming are required, resulting in low yield and poor processing efficiency. At the same time, rigid mechanical extrusion can easily damage the TPU molecular structure, leading to hardening of the shoe upper after molding, reduced wearing comfort, and the bonding gap can easily trap residual air, resulting in problems such as glue separation and peeling later.

[0004] The second method is 3D mold injection molding process, which relies on customized integrated 3D shoe upper mold injection molding composite TPU to form 3D shoe uppers. However, the processing cost of customized 3D molds is high, the shoe upper pattern iteration speed is fast, and the production of multiple types of shoe uppers requires multiple sets of molds, resulting in extremely high equipment investment costs. In addition, the mold injection heating and cooling takes a long time, the production cycle is slow, and it cannot be adapted to large-scale flexible production. Summary of the Invention

[0005] The purpose of this invention is to solve the industry pain points of existing TPU composite processing for shoe uppers, such as serious glue overflow, weak adhesion, hardening of finished products, reliance on expensive custom molds for 3D molding, and high production costs. The invention provides a vacuum positive pressure composite molding equipment for shoe uppers, which relies on bidirectional air pressure composite to replace mechanical hard extrusion, achieves 3D shaping of shoe uppers without molds, eliminates glue overflow defects, and balances processing efficiency and finished product quality.

[0006] The technical problem to be solved by this invention is achieved through the following technical solution: The present invention provides a 3D shoe upper vacuum bonding machine with a positive pressure system, including a machine base, an X-axis translation component on the machine base, a feeding fixture that moves along the X-axis on the X-axis translation component, the feeding fixture being used to place shoe material to be processed, a heating component and an air positive pressure component on the X-axis translation component, respectively used to heat the shoe material on the feeding fixture and apply air pressure, and the feeding fixture is also connected to a negative pressure system for performing vacuum negative pressure operation on the feeding fixture.

[0007] Furthermore, the X-axis translation assembly includes two U-shaped support plates spaced apart on the top surface of the worktable, and two sets of X-axis rotary seats spaced apart on the left and right sides of the U-shaped support plates on the top surface of the worktable. Each set of X-axis rotary seats has an X-axis rotating rod rotatably mounted on it. X-axis pulleys are fixedly fitted at both ends of the X-axis rotating rod. An X-axis transmission belt is connected between the corresponding two X-axis pulleys on the two sets of X-axis rotating rods. The two X-axis transmission belts pass through the bottom of the two U-shaped support plates respectively. An X-axis mounting plate is provided on one side of the top surface of the worktable at one of the X-axis rotary seats. An X-axis drive motor that is driven and connected to the corresponding X-axis rotating rod is mounted on one side of the X-axis mounting plate. X-axis guide rails are provided on the top surfaces of the two U-shaped support plates respectively. A set of X-axis sliders is slidably fitted on the two X-axis guide rails respectively. X-axis connecting plates are fixedly connected to the top surfaces of the two sets of X-axis sliders respectively. Belt clamping plates that clamp the ends of the corresponding X-axis transmission belts are provided at the left and right ends of the top surfaces of the X-axis connecting plates respectively.

[0008] Furthermore, the feeding fixture includes a feeding support plate mounted on two X-axis connecting plates via several buffer mechanisms. A feeding plate is positioned at the center of the top surface of the feeding support plate, and a feeding negative pressure groove is formed at the center of the top surface of the feeding plate. A breathable support mesh, a feeding mold, and the shoe material to be processed are placed sequentially from bottom to top within the feeding negative pressure groove. The feeding plate, located within the feeding negative pressure groove, has several negative pressure adsorption holes arranged in a rectangular array on its top surface. The bottom surface of the feeding support plate has several negative pressure connection holes communicating with these adsorption holes. These negative pressure connection holes are connected to a negative pressure system. An annular sealing groove is formed around the material discharge negative pressure groove on the top surface of the material plate. An annular sealing ring is embedded in the annular sealing groove. A hollow membrane frame is hinged to the left side of the material discharge support plate. A sealing membrane is fixedly connected to the top surface of the hollow membrane frame to cooperate with the annular sealing ring and form a negative pressure space in the material discharge negative pressure groove. Two opening and closing cylinders are set at intervals on both sides of the bottom surface of the material discharge support plate. The telescopic shaft of the opening and closing cylinder can extend and retract through the material discharge support plate, and the end of the telescopic shaft is hinged at intervals to the bottom surface of the hollow membrane frame on both sides of the material discharge plate. This is used to drive the separation and contact between the sealing membrane on the hollow membrane frame and the annular sealing ring.

[0009] Furthermore, the negative pressure system is a vacuum pump.

[0010] Furthermore, the buffer mechanism includes a number of buffer posts spaced apart on the top surface of the corresponding X-axis connecting plate, and a number of buffer sleeves arranged in a rectangular array on the bottom surface of the feeding support plate. The number of buffer posts corresponds one-to-one with the number of buffer sleeves. Each buffer post passes through the corresponding buffer sleeve and slides in cooperation with the feeding support plate. A buffer spring is provided inside the buffer sleeve, and the two ends of the buffer spring elastically abut against the X-axis connecting plate and the feeding support plate, respectively.

[0011] Furthermore, a heat insulation component is also installed on the machine base. The heat insulation film of the heat insulation component is detachably connected to the X-axis connecting plate via a locking mechanism. The heat insulation component includes two heat insulation connecting plates spaced apart on the top surface of the worktable. A film fixing rod is fixedly connected between the two heat insulation connecting plates. A film placement drum is rotatably installed between the two heat insulation connecting plates. The heat insulation film is wound on the film placement drum. A spring is sleeved on the film fixing rod, and one end of the spring is fixedly connected to the outer wall of the film fixing rod, while the other end of the spring is fixedly connected to the inner wall of the film placement drum. The rewinding force generated by the spring and the outward pulling force of the heat insulation film... The directions of movement are opposite; the locking mechanism includes locking connecting blocks respectively disposed on the top surface of the belt clamping plate on the left side of the two X-axis connecting plates, and lower locking plates are fixedly connected to the top surface of the two locking connecting blocks respectively. The top surface of the two lower locking plates is fastened to the upper locking plate by locking bolts. A membrane material mounting plate is detachably clamped between the lower locking plate and the upper locking plate. The membrane material mounting plate is used to clamp and connect with the end of the heat insulation film. The membrane material mounting plate also includes an upper clamping plate that contacts the upper locking plate and a lower clamping plate that contacts the lower locking plate. The end of the heat insulation film is clamped between the lower clamping plate and the upper clamping plate by several fastening bolts.

[0012] Furthermore, at least one support column is provided on the machine platform below the positive air pressure component. The height of the support column is between the X-axis connecting plate and the membrane mounting plate. During operation, the top of the support column can abut against the bottom surface of the feeding support plate.

[0013] Furthermore, the positive air pressure assembly includes a plurality of positive pressure connecting columns arranged in a rectangular array on the top surface of the workbench. A positive pressure connecting plate is fixedly connected to the top surface of each positive pressure connecting column. A booster cylinder is located at the center of the top surface of the positive pressure connecting plate. The end of the booster cylinder's telescopic shaft can extend and retract through the positive pressure connecting plate and is fixedly connected to a positive pressure mounting plate. A positive pressure sealing plate is fixedly connected to the bottom surface of the positive pressure mounting plate via a plurality of positive pressure connecting rods arranged in a rectangular array. A negative pressure groove corresponding to the material discharge groove is formed at the center of the bottom surface of the positive pressure sealing plate. The positive pressure groove has four edges of the bottom surface of the positive pressure sealing plate aligned and fitted with four edges of the top surface of the discharge plate. After the positive pressure sealing plate is pressed down to tighten the annular sealing ring, a positive pressure space is formed inside the positive pressure groove. The bottom surface of the positive pressure sealing plate inside the positive pressure groove has several positive pressure vent holes arranged in a rectangular array. The top surface of the positive pressure sealing plate has several positive pressure connection holes arranged in a rectangular array that communicate with the several positive pressure vent holes. The top surface of the positive pressure mounting plate has several positive pressure guide posts arranged in a rectangular array, and the several positive pressure guide posts slide in fit with the positive pressure connection plate.

[0014] Furthermore, the heating assembly includes several heating connecting columns arranged in a rectangular array on the top surface of the workbench, and an oven is fixedly connected to the top surface of the heating connecting columns. The oven is used to heat the colloid placed on the feeding fixture at high temperature, and an inlet and outlet opening is provided on the front side of the oven for the feeding fixture to pass through.

[0015] Furthermore, the top surface of the feeding mold is provided with a glue placement groove. The shoe material includes fabric and glue. The glue placement groove is used to place the glue. The fabric is placed on the top surface of the feeding mold and is in contact with the glue. The breathable support mesh is Teflon mesh, the fabric is either cloth or leather, and the glue is thermoplastic polyurethane elastomer.

[0016] Furthermore, a housing is also provided on the top surface of the workbench on the left side of the feeding area. The housing encloses the heating component, the positive air pressure component, and the heat insulation component. A processing opening is provided on the right side of the housing to allow the X-axis translation component to be installed and the material feeding fixture to enter and exit. A first maintenance door is provided on one side of the housing corresponding to the heating component and the heat insulation component, and a second maintenance door is provided on one side of the housing corresponding to the positive air pressure component. A control panel is also provided on the right side of the housing.

[0017] In another aspect, the present invention provides a bonding method with a positive pressure system, which is performed using the aforementioned 3D shoe upper vacuum bonding machine with a positive pressure system. The specific processing flow is as follows: Step S1: Initialize and reset the equipment. The X-axis translation component drives the feeding fixture to slide to the right-end feeding area. The operator lays breathable Teflon mesh and places the feeding mold inside the feeding negative pressure trough in sequence. The pre-treated adhesive is placed in the adhesive groove of the feeding mold. Finally, the fabric or leather substrate is laid on top. The opening and closing cylinder is closed, pushing the hollow membrane frame down. The sealing membrane presses the annular sealing ring. The negative pressure equipment connects to the negative pressure connection hole to extract the internal air, so that the feeding negative pressure trough forms a closed negative pressure space. The negative pressure adsorption makes the sealing membrane press the fabric and adhesive together. Step S2: The X-axis drive motor starts, and the X-axis transmission belt pulls the feeding fixture to move laterally to the left, passing through the processing opening of the machine housing and moving into the constant temperature oven inside the heating component. The oven controls the temperature and heats the colloid on the feeding fixture, so that the colloid melts evenly throughout. Step S3: After heating is complete, the X-axis translation component drives the feeding fixture to move directly below the positive air pressure component. At the same time, the heat insulation film of the heat insulation component is pulled out synchronously with the feeding fixture. Subsequently, the pressure cylinder moves downward to push the positive pressure sealing plate down to seal and adhere to the top surface of the feeding plate, sealing the positive pressure groove to form a positive pressure space. At this time, the support column abuts against the bottom surface of the feeding support plate. An external high-pressure air source is introduced into the positive pressure connection hole and releases a uniform high-pressure airflow through the positive pressure outlet hole, making the positive pressure groove full of a positive pressure environment. At the same time, a constant negative pressure is maintained at the bottom, forming a bidirectional air pressure extrusion. Step S4: After pressure holding and curing is completed, the positive pressure air supply is turned off and the negative pressure is released. The booster cylinder moves upward to reset. Then, the X-axis translation component drives the feeding fixture back to the feeding area. The opening and closing cylinder lifts and opens the sealing membrane. The composite fabric and colloid are then manually removed.

[0018] Compared with existing technologies, this invention has the following five core beneficial effects: First, this invention utilizes a sealing film to press the annular sealing ring, creating a negative pressure space in the material discharge negative pressure groove. This allows for pre-sealing of the colloid under negative pressure during the early stages of molding, and, in conjunction with a positive pressure sealing plate, creates a positive pressure space in the positive pressure groove. This forms bidirectional air pressure extrusion, limiting the colloid's flow range and effectively eliminating overflow defects. Processing is zero-loss: the entire heating and pressing process constrains colloid displacement, eliminating rigid extrusion processes, effectively solving the problem of colloid overflow, saving subsequent trimming steps, improving finished product yield, increasing mass production yield to over 98%, and reducing raw material loss. Meanwhile, the combined pressure from both top and bottom air pressures ensures that the airflow achieves uniform force distribution on the shoe upper 360° without any dead angles, effectively eliminating defects such as air bubbles and loose adhesion at the edges. The adhesion between the colloid and the fabric or leather molecules is higher, greatly improving the peel resistance and bending resistance of the finished product. The peel strength is increased by more than 40%. The flexible air pressure does not damage the elastic molecular chains of the colloid, so the finished product will not harden and fully retains the original rebound characteristics of the colloid. The shoe upper is soft and comfortable to wear, and it will not come apart even after long-term wear. The bonding strength is greatly improved, and the finished product is highly durable.

[0019] Secondly, this invention uses flexible pneumatic pressure throughout the entire process, without the hard extrusion and shearing force of metal, which will not damage the elastic structure of the TPU polymer. After processing, the colloid does not harden or become brittle, retaining the original softness and extensibility of the base material. The breathability and resilience of the shoe upper are intact, resulting in a better wearing experience, preserving the original properties of the material, and providing excellent wearing comfort. Third, this invention relies on the positive and negative pressure difference to shape the 3D three-dimensional curved surface texture of the shoe upper, eliminating the need to open molds for different shoe styles and make irregular pressing molds, greatly reducing mold opening costs and shortening the production line change cycle, and is suitable for multi-category, small-batch, and fast-iteration shoe material production. Fourth, this invention features a follow-up elastically wound heat insulation component. The heat insulation film of the heat insulation component moves synchronously with the placement component. After the colloid is heated, the pulled-out heat insulation film can shield the heating source and radiation, isolating the transmission components from high-temperature baking. At the same time, the heat insulation film is connected to the feeding fixture through a detachable locking mechanism and a double inspection door design, which facilitates the replacement of the heat insulation film and the inspection and maintenance of components. Combined with a floating buffer mechanism and a buffer mechanism, it can effectively eliminate the impact and vibration of pressing. The heat insulation film also avoids equipment jamming caused by high-temperature deformation, reduces the equipment maintenance failure rate, and effectively extends the service life of the whole machine. Attached Figure Description

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the overall structure of a 3D shoe upper vacuum bonding machine with a positive pressure system according to the present invention; Figure 2 This is a schematic diagram of the structure of a 3D shoe upper vacuum bonding machine with a positive pressure system for removing the machine shell according to the present invention; Figure 3 This is a partial structural schematic diagram of a 3D shoe upper vacuum bonding machine with a positive pressure system according to the present invention; Figure 4 for Figure 3 Enlarged diagram of point A in the diagram; Figure 5 This is a schematic diagram of the heat insulation component and locking mechanism of a 3D shoe upper vacuum bonding machine with a positive pressure system according to the present invention. Figure 6 This is a cross-sectional schematic diagram of the locking mechanism of a 3D shoe upper vacuum bonding machine with a positive pressure system according to the present invention; Figure 7 This is a cross-sectional view and a partially enlarged schematic diagram of the air positive pressure component of a 3D shoe upper vacuum bonding machine with a positive pressure system according to the present invention; Figure 8 This is a cross-sectional schematic diagram of the heating component of a 3D shoe upper vacuum bonding machine with a positive pressure system according to the present invention; Figure 9 This is a cross-sectional schematic diagram of the feeding fixture of a 3D shoe upper vacuum bonding machine with a positive pressure system according to the present invention; Figure 10 This is a schematic flowchart of a bonding method with a positive pressure system according to the present invention.

[0022] Figure label: 1-Machine base; 3-Heat insulation component; 301-Heat insulation film; 302-Heat insulation connecting plate; 303-Membrane material fixing rod; 304-Membrane material placement drum; 4-Heating component; 401-Heating connecting column; 402-Oven; 403-Inlet / outlet opening; 5-Positive air pressure component; 501-Positive pressure connecting column; 502-Positive pressure connecting plate; 503-Pressure booster cylinder; 504-Positive pressure mounting plate; 505-Positive pressure connecting rod; 506-Positive pressure sealing plate; 507 - Positive pressure groove; 508 - Positive pressure vent; 509 - Positive pressure connection hole; 510 - Positive pressure guide post; 511 - Baffle; 6 - X-axis translation assembly; 601 - Two U-shaped support plates; 602 - X-axis rotary seat; 603 - X-axis rotating rod; 604 - X-axis pulley; 605 - X-axis drive belt; 606 - X-axis mounting plate; 607 - X-axis drive motor; 608 - X-axis guide rail; 609 - X-axis slider; 610 - X-axis connecting plate; 611 - Belt clamp 7-Holding plate; 7-Discharge jig; 701-Discharge support plate; 702-Discharge plate; 703-Discharge negative pressure groove; 704-Hollow membrane frame; 705-Negative pressure adsorption hole; 706-Negative pressure connection hole; 707-Annular sealing ring; 708-Sealing membrane; 709-Opening and closing cylinder; 710-Breathable support mesh; 711-Discharge mold; 712-Colloid; 713-Fabric; 8-Locking mechanism; 801-Locking connecting block; 802-Lower locking plate; 803-Locking bolt; 804-Upper locking plate; 805-Membrane material mounting plate; 8051-Upper clamping plate; 8052-Lower clamping plate; 8053-Fastening bolt; 9-Support column; 10-Feeding area; 11-Machine housing; 111-Processing opening; 112-First inspection door panel; 113-Second inspection door panel; 114-Control panel; 15-Buffer mechanism; 1501-Buffer column; 1502-Buffer sleeve; 1503-Buffer spring. Detailed Implementation

[0023] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0024] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Combination Figures 1-9 As shown, the present invention provides a 3D shoe upper vacuum bonding machine with a positive pressure system, including a machine base 1, with a worktable fixedly installed on the top surface of the machine base 1; the top surface of the worktable is sequentially equipped with a heat insulation component 3, a heating component 4, and an air positive pressure component 5 from left to right; an X-axis translation component 6 is also fixedly arranged on the top surface of the worktable, and the X-axis translation component 6 is driven and connected to a feeding fixture 7 for placing shoe materials, which is arranged below the heating component 4 and the air positive pressure component 5; the top surface of the worktable is designated as a feeding area 10 at the right end of the X-axis translation component 6, and the feeding area 10 is used to place the fabric 713 and the adhesive 712 to be processed, completing the pre-processing material preparation.

[0026] When the X-axis translation component 6 is running, it sequentially drives the unloading fixture 7 to stop at the processing stations corresponding to the loading area 10, heating component 4, and positive air pressure component 5. The heat insulation film 301 configured in the heat insulation component 3 is detachably connected to the feeding fixture 7 through the locking mechanism 8. The heat insulation film 301 is used to block the high temperature generated by the heating component 4 during operation, so as to avoid damage to various parts below by high temperature. Several support columns 9 are fixed in a rectangular array on the top surface of the workbench directly below the positive air pressure component 5. The support columns 9 vertically support the feeding fixture 7. The positive air pressure component 5 and the feeding fixture 7 are aligned vertically. During processing, the positive pressure output by the positive air pressure component 5 and the negative pressure constructed by the feeding fixture 7 are used to complete the compression molding of the fabric 713 and the colloid 712.

[0027] In this embodiment, combined with Figure 2 and Figure 3 As shown, the X-axis translation assembly 6 includes two U-shaped support plates 601 spaced apart on the top surface of the worktable, and two sets of X-axis rotary seats 602 spaced apart on the left and right sides of the U-shaped support plates on the top surface of the worktable. Each set of X-axis rotary seats 602 includes two X-axis rotary seats 602 spaced apart, and an X-axis rotating rod 603 is rotatably arranged between the two X-axis rotary seats 602. X-axis pulleys 604 are fixedly sleeved at both ends of the X-axis rotating rod 603. An X-axis transmission belt 605 is connected between the corresponding two X-axis pulleys 604 on the two sets of X-axis rotating rods 603. The two X-axis transmission belts 605 pass through the bottom holes of the two U-shaped support plates 601 respectively to ensure the transmission of the X-axis transmission belts 605. An X-axis mounting plate 606 is provided on one side of a set of X-axis rotary seats 602 on the top surface of the worktable. An X-axis drive motor 607 is installed on one side of the X-axis mounting plate 606 and is driven and connected to the corresponding X-axis rotary rod 603. The output end of the X-axis drive motor 607 is driven and connected to the corresponding X-axis rotary rod 603 to provide power for the overall sliding.

[0028] Two U-shaped support plates 601 are respectively provided with X-axis guide rails 608 on their top surfaces, and a set of X-axis sliders 609 are slidably engaged on each of the two X-axis guide rails 608; each set of X-axis sliders 609 includes two X-axis sliders 609 spaced apart on the left and right, and an X-axis connecting plate 610 is fixedly connected to the top surface of the two X-axis sliders 609. The left and right ends of the top surface of the X-axis connecting plate 610 are respectively detachably and fastened with belt clamping plates 611 that clamp the ends of the corresponding X-axis transmission belts 605. The belt clamping plates 611 and the X-axis connecting plate 610 cooperate to clamp and fix the ends of the corresponding X-axis transmission belts 605, so as to realize that the belt drives the X-axis connecting plate 610 to slide synchronously.

[0029] In this embodiment, combined with Figure 3 , Figure 4 and Figure 9 As shown, the feeding fixture 7 includes two buffer mechanisms 15 disposed on the top surface of the two X-axis connecting plates 610. The top surfaces of the two buffer mechanisms 15 are elastically floatingly connected to a feeding support plate 701. The bottom surface of the feeding support plate 701 can abut against the support column 9. A feeding plate 702 is disposed at the center of the top surface of the feeding support plate 701. A feeding negative pressure groove 703 is opened at the center of the top surface of the feeding plate 702. A breathable support mesh 710, a feeding mold 711, and a piece of fabric 713 to be processed are placed in the feeding negative pressure groove 703 from bottom to top. The top surface of the feeding mold 711 is provided with a placement groove for the adhesive. The shoe material includes adhesive and fabric. The placement groove is used to fill the adhesive 712 and constrain the laying range of the adhesive 712. After the adhesive 712 is placed in the placement groove, the fabric 713 is placed on the top surface of the feeding mold 711. The fabric 713 is in contact with the top surface of the adhesive 712. The layering order is fixed to ensure uniform penetration of negative pressure airflow. Among them, the breathable support mesh 710 is a Teflon mesh, which has a supporting function to provide support for the feeding mold 711, and also has a breathable function to create a negative pressure environment for the negative pressure groove 703 of the negative pressure adsorption hole 705. The fabric 713 can be either cloth or leather. The colloid 712 is thermoplastic polyurethane elastomer, also known as TPU, which is suitable for high-temperature melt composite molding. The top surface of the discharge plate 702, located inside the discharge negative pressure trough 703, is provided with a rectangular array of several negative pressure adsorption holes 705. The holes 705 are evenly distributed to ensure consistent adsorption across the entire negative pressure area. The bottom surface of the discharge support plate 701 is provided with a linear array of several negative pressure connection holes 706 at equal intervals. The several negative pressure connection holes 706 are connected to several corresponding negative pressure adsorption holes 705. The negative pressure connection holes 706 are connected to a negative pressure system, which is a vacuum pump (not shown in the figure). This vacuum pump is existing technology and can provide a negative pressure air source to conduct negative pressure airflow through the negative pressure connection holes 706. An annular sealing groove is formed on the top surface of the discharge plate 702 around the discharge negative pressure groove 703. An annular sealing ring 707 is embedded in the annular sealing groove. The annular sealing ring 707 is embedded in the groove without displacement or falling off. A hollow membrane frame 704 is hinged to the left side of the discharge support plate 701. The hinge gap is reasonably reserved to avoid rotation jamming. A sealing membrane 708 is fixedly connected to the top surface of the hollow membrane frame 704. The sealing membrane 708 has elastic shrinkage ability and sealing ability. It can adapt to the deformation caused by positive and negative gas pressure. The sealing membrane 708 can rotate synchronously with the hollow membrane frame 704, pressing and separating with the annular sealing ring 707. When pressed, it seals the gap and isolates the outside air, so that a closed negative pressure space is formed inside the discharge negative pressure groove 703.

[0030] Two opening and closing cylinders 709 are spaced apart on the bottom surface of the feeding support plate 701 on both sides of the feeding plate 702. The telescopic shaft of the opening and closing cylinder 709 can extend and retract through the feeding support plate 701, and the end of the telescopic shaft is hinged to the bottom surface of the hollow membrane frame 704 on both sides of the feeding plate 702. The two opening and closing cylinders 709 extend and retract synchronously to offset the force deviation on one side. The telescopic shaft of the opening and closing cylinder 709 extends and retracts, driving the hollow membrane frame 704 to pitch and rotate, thereby driving the top sealing membrane 708 to rise and fall synchronously, realizing the switching between two working conditions: separation and pressure relief of the sealing membrane 708 and contact sealing of the annular sealing ring 707.

[0031] Combination Figure 4 As shown, the two buffer mechanisms 15 are symmetrically arranged. Each buffer mechanism 15 includes two buffer pillars 1501 spaced apart on the top surface of the corresponding X-axis connecting plate 610, and two buffer sleeves 1502 arranged in a rectangular array on the bottom surface of the feeding support plate 701. The two buffer pillars 1501 correspond one-to-one with the two buffer sleeves 1502. Each buffer pillar 1501 passes through the corresponding buffer sleeve 1502 and slides in cooperation with the feeding support plate 701. A buffer spring 1503 is provided inside the buffer sleeve 1502. The two ends of the buffer spring 1503 elastically abut against the X-axis connecting plate 610 and the feeding support plate 701, respectively. The elastic force of the buffer spring 1503 enables the feeding support plate 701 to float elastically as a whole, buffering the instantaneous impact load of the pressing, weakening the resonance of the whole machine, and avoiding rigid collision damage to the parts.

[0032] In this embodiment, combined with Figure 2 and Figure 5 As shown, the locking mechanism 8 includes locking connecting blocks 801 respectively disposed on the top surface of the belt clamping plate 611 on the left side of the two X-axis connecting plates 610; the top surfaces of the two locking connecting blocks 801 are respectively fixedly connected to the lower locking plates 802, and the top surfaces of the two lower locking plates 802 are respectively fastened to the upper locking plates 804 by locking bolts 803; a membrane material mounting plate 805 is detachably clamped between the lower locking plates 802 and the upper locking plates 804, and the membrane material mounting plate 805 is used to clamp and connect with the end of the heat insulation film 301 of the heat insulation component 3; the height of the support column 9 is set between the X-axis connecting plate 610 and the membrane material mounting plate 805 to avoid excessive movement of the material feeding support plate 701 causing transmission interference failure of the X-axis translation component 6.

[0033] In this embodiment, combined with Figure 6 As shown, the membrane mounting plate 805 includes an upper clamping plate 8051 that contacts the upper locking plate 804, and a lower clamping plate 8052 that contacts the lower locking plate 802. The lower clamping plate 8052 and the upper clamping plate 8051 are clamped together by a number of fastening bolts 8053 to hold the end of the heat insulation film 301, thereby completing the detachable assembly of the heat insulation film 301 and the feeding fixture 7, which facilitates the replacement of the heat insulation film 301 in the future.

[0034] In this embodiment, combined with Figure 2 and Figure 7 As shown, the positive air pressure assembly 5 includes several positive pressure connecting columns 501 arranged in a rectangular array on the top surface of the workbench. A positive pressure connecting plate 502 is fixedly connected to the top surface of the positive pressure connecting columns 501. A baffle 511 is also provided on the bottom surface of the positive pressure connecting plate 502 between two adjacent positive pressure connecting columns 501 to cover the positive pressure sealing plate 506 during operation. If the gas pressure is too high, it will cause impact damage to external components. A booster cylinder 503 is provided at the center of the top surface of the positive pressure connecting plate 502. The end of the telescopic shaft of the booster cylinder 503 can extend and retract through the positive pressure connecting plate 502 and is fixedly connected to the positive pressure mounting plate 504. The bottom surface of the positive pressure mounting plate 504 is fixedly connected to the positive pressure sealing plate 506 through several positive pressure connecting rods 505 arranged in a rectangular array.

[0035] A positive pressure groove 507 corresponding to the negative pressure groove 703 is opened at the center of the bottom surface of the positive pressure sealing plate 506. The positive pressure groove 507 and the negative pressure groove 703 are aligned vertically. The four edges of the bottom surface of the positive pressure sealing plate 506 are aligned and fitted with the four edges of the top surface of the discharge plate 702. The four edges of the bottom surface of the positive pressure sealing plate 506 can fit and seal with the four edges of the top surface of the discharge plate 702. After the positive pressure sealing plate 506 presses down and tightens the annular sealing ring 707, the edge of the bottom surface of the positive pressure sealing plate 506 squeezes the annular sealing ring 707 to produce elastic deformation, fills the sealing gap, isolates the external normal pressure airflow, and forms a positive pressure space in the positive pressure groove 507 to ensure the stability of the pressurized air pressure.

[0036] The positive pressure sealing plate 506 is located in the positive pressure groove 507 and has a number of positive pressure vent holes 508 arranged in a rectangular array on its bottom surface. The positive pressure sealing plate 506 has a number of positive pressure connection holes 509 arranged in a rectangular array on its top surface, which are connected to the number of positive pressure vent holes 508. The positive pressure space, together with the negative pressure space in the material discharge negative pressure groove 703, forms a bidirectional composite air pressure through negative pressure adsorption and positive pressure pressing, so that the fabric 713 and the colloid 712 are tightly pressed together.

[0037] An external high-pressure air source is connected to the positive pressure connection hole 509, and the airflow is evenly output through the positive pressure outlet hole 508. Combined with the negative pressure space of the bottom material discharge negative pressure groove 703, a two-way composite air pressure is constructed to press the fabric 713 and the colloid 712 together.

[0038] The top surface of the positive pressure mounting plate 504 is arranged in a rectangular array with several positive pressure guide posts 510. The positive pressure guide posts 510 slide in cooperation with the positive pressure connecting plate 502. Relying on the synchronous limiting of multiple positive pressure guide posts 510, the lifting and lowering movements of the positive pressure mounting plate 504 and the positive pressure sealing plate 506 are guided and corrected, eliminating downward pressure skew deviation and ensuring the flatness of the pressing.

[0039] In this embodiment, combined with Figure 2 and Figure 8 As shown, the heating assembly 4 includes several heating connecting columns 401 arranged in a rectangular array on the top surface of the workbench. An oven 402 is fixedly connected to the top surface of the heating connecting columns 401. The oven 402 is used to heat the colloid 712 carried by the feeding fixture 7, and to heat the colloid 712 at a controlled temperature to homogenize and melt the internal structure of the colloid 712. An inlet / outlet opening 403 is opened on the front side of the oven 402. The size of the opening is adapted to the outer contour of the feeding fixture 7. The feeding fixture 7 is smoothly moved into the oven 402 through the inlet / outlet opening 403 to complete the heating operation.

[0040] In this embodiment, combined with Figure 2 and Figure 5 As shown, the heat insulation component 3 includes two heat insulation connecting plates 302 spaced apart on the top surface of the workbench, and a membrane fixing rod 303 is fixedly connected between the two heat insulation connecting plates 302; a membrane placement drum 304 is also rotatably arranged between the two heat insulation connecting plates 302, and a heat insulation film 301 is wound on the membrane placement drum 304; a spring (not shown in the figure) is sleeved on the membrane fixing rod 303, one end of the spring (not shown in the figure) is fixedly connected to the outer wall of the membrane fixing rod 303, and the other end of the spring is fixedly connected to the inner wall of the membrane placement drum 304; the rewinding force generated by the spring (not shown in the figure) is opposite to the outward movement direction of the heat insulation film 301; the feeding jig 7 stores energy when sliding and pulling the film, and releases energy to rewind when returning to its original position, so as to realize the heat insulation film 301 being tensioned and automatically rewound. When the oven 402 heats the colloid 712, the temperature of the oven 402 cannot be cooled down quickly. At this time, the temperature of the oven 402 downwards is too high. When the X-axis translation component 6 drives the feeding fixture 7 to move to the right, the feeding fixture 7 pulls out the heat insulation film 301 through the locking mechanism 8. The heat insulation film covers the bottom of the oven 402, effectively isolating the high temperature radiation of the oven 402 and preventing the parts below the heating component 4 and the X-axis translation component 6 from being deformed, aged and stuck due to heat.

[0041] Combination Figure 1 As shown, a housing 11 is also provided on the top surface of the workbench on the left side of the loading area 10. The housing 11 encloses the heating component 4, the positive air pressure component 5, and the heat insulation component 3. A processing opening 111 is provided on the right side of the housing 11 to allow the placement of the X-axis translation component 6 and the entry and exit of the material feeding fixture 7. A first maintenance door 112 is provided on one side of the housing 11 corresponding to the position of the heating component 4 and the heat insulation component 3, and a second maintenance door 113 is provided on one side of the housing 11 corresponding to the position of the positive air pressure component 5. Handles are provided on the first maintenance door 112 and the second maintenance door 113 to facilitate the opening of the maintenance door, facilitate the maintenance of the booster cylinder 503, the high-pressure air circuit and other components, and reduce the difficulty of equipment operation and maintenance.

[0042] A control panel 114 is also provided on one side of the housing 11 to control the linkage of various components and mechanisms, and realize the translation, heating, and air pressure composite molding of the colloid 712 and the fabric 713, which is convenient for the staff to operate.

[0043] Combination Figure 10 The present invention also provides a bonding method with a positive pressure system, which is performed using a vacuum colloid 712 molding device with all the above-mentioned structural features. The processing steps, process actions, and equipment linkage logic completely correspond to the method claims. The specific processing flow is as follows: Step S1: Material preparation at the loading station: The equipment is initialized and reset. The X-axis translation component 6 drives the feeding fixture 7 to slide to the right-end feeding area 10. The operator lays a breathable Teflon mesh cloth and places the feeding mold 711 inside the feeding negative pressure tank 703 in sequence. The pre-treated adhesive 712 is placed in the adhesive groove of the feeding mold 711. Finally, the cloth or leather substrate is laid on it. The opening and closing cylinder 709 is closed, and the hollow membrane frame 704 is pushed down. The sealing membrane 708 presses the annular sealing ring 707. The negative pressure equipment docks with the negative pressure connection hole 706 to draw out the internal air, so that the feeding negative pressure tank 703 forms a closed negative pressure space. The negative pressure adsorption makes the sealing membrane 708 press the cloth 713 and the adhesive 712, limiting the flow range of the adhesive 712 and avoiding adhesive overflow in advance.

[0044] Step S2, Constant Temperature Heating and Softening: Start the X-axis drive motor 607, and the X-axis rotating rod 603 and X-axis transmission belt 605 will rotate synchronously, pulling the feeding fixture 7 to move laterally to the left; the feeding fixture 7 passes through the processing opening 111 of the machine housing 11 and moves into the oven 402 inside the heating component 4; the oven 402 heats the colloid 712 at a constant temperature, which promotes the uniform melting of the colloid 712, optimizes the molding and bonding performance of the colloid 712, and maintains the elastic stability of the colloid 712.

[0045] Step S3, Positive and Negative Pressure Bidirectional Composite Molding: After heating, the X-axis translation component 6 drives the unloading fixture 7 to move directly below the positive air pressure component 5; simultaneously, the heat insulation film 301 of the heat insulation component 3 is pulled out synchronously with the unloading fixture 7, and the spring generates reverse winding tension to keep the heat insulation film 301 flat and taut, isolating the high temperature radiation of the oven 402 and protecting the X-axis translation component 6 and the unloading fixture 7 from heat deformation, aging and jamming; subsequently, the pressure cylinder 503 moves downward to push the positive pressure sealing plate 506 down to seal and adhere to the top surface of the unloading plate 702, sealing the positive pressure groove. 507 forms a positive pressure space; at this time, the support column 9 abuts against the bottom surface of the feeding support plate 701, limiting the bearing feeding fixture 7, preventing the feeding support plate 701 from moving too far downward, and avoiding interference and jamming with the X-axis translation component 6; an external high-pressure air source is introduced into the positive pressure connection hole 509, and a uniform high-pressure airflow is released through the positive pressure outlet hole 508, so that a stable positive pressure environment is formed in the positive pressure groove 507; a constant negative pressure is maintained at the bottom, constructing a bidirectional air pressure extrusion environment, relying on air fluid to apply pressure in all directions, and pressing the fabric 713 and the colloid 712 together with 360° no dead angle.

[0046] Step S4, Unloading and Resetting: After the pressure holding and curing is completed, the positive pressure air supply is turned off and the negative pressure is released. The booster cylinder 503 moves upward and resets. Then, the X-axis translation component 6 drives the unloading fixture 7 back to the loading area 10. The opening and closing cylinder 709 lifts and opens the sealing membrane 708. The composite-molded fabric 713 and colloid 712 are manually removed, and one cycle of processing is completed. Steps S1, S2, 3 and 4 are executed again to complete continuous processing.

[0047] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A 3D shoe upper vacuum bonding machine with a positive pressure system, characterized in that, The machine includes an X-axis translation component, on which a feeding fixture that moves along the X-axis is mounted. The feeding fixture is used to place the shoe material to be processed. The X-axis translation component is also equipped with a heating component and a positive air pressure component, which are used to heat the shoe material on the feeding fixture and apply air pressure, respectively. The feeding fixture is also connected to a negative pressure system for performing vacuum negative pressure operation on the feeding fixture.

2. The 3D shoe upper vacuum bonding machine with a positive pressure system according to claim 1, characterized in that, The X-axis translation assembly includes two U-shaped support plates spaced apart on the top surface of the worktable, and two sets of X-axis rotary seats spaced apart on the top surface of the worktable on the left and right sides of the U-shaped support plates. Each set of X-axis rotary seats has an X-axis rotating rod rotatably mounted on it. X-axis pulleys are fixedly sleeved at both ends of the X-axis rotating rod. An X-axis transmission belt is connected between the corresponding two X-axis pulleys on the two sets of X-axis rotating rods. The two X-axis transmission belts pass through the bottom of the two U-shaped support plates respectively. An X-axis mounting plate is provided on one side of a set of X-axis rotary seats on the top surface of the worktable. An X-axis drive motor that is driven and connected to the corresponding X-axis rotary rod is installed on one side of the X-axis mounting plate. The top surfaces of the two U-shaped support plates are respectively equipped with X-axis guide rails, and a set of X-axis sliders are slidably fitted on the two X-axis guide rails. The top surfaces of the two sets of X-axis sliders are respectively fixedly connected to X-axis connecting plates, and the left and right ends of the top surfaces of the X-axis connecting plates are respectively equipped with belt clamping plates that clamp the ends of the corresponding X-axis transmission belts.

3. The 3D shoe upper vacuum bonding machine with a positive pressure system according to claim 2, characterized in that, The feeding fixture includes a feeding support plate set on the two X-axis connecting plates by a number of buffer mechanisms. A feeding plate is set at the center of the top surface of the feeding support plate. A feeding negative pressure groove is opened at the center of the top surface of the feeding plate. A breathable support mesh, a feeding mold, and shoe material to be processed are placed in the feeding negative pressure groove from bottom to top. The top surface of the discharge plate is arranged in a rectangular array with several negative pressure adsorption holes. The bottom surface of the discharge support plate is provided with several negative pressure connection holes that communicate with the several negative pressure adsorption holes. The several negative pressure connection holes are connected to the negative pressure system. The top surface of the discharge plate is provided with an annular sealing groove around the discharge negative pressure groove. An annular sealing ring is embedded in the annular sealing groove. A hollow membrane frame is hinged to the left side of the discharge support plate. A sealing membrane is fixedly connected to the top surface of the hollow membrane frame to cooperate with the annular sealing ring to form a negative pressure space in the discharge negative pressure groove. Two opening and closing cylinders are set at intervals on both sides of the bottom surface of the feeding support plate. The telescopic shaft of the opening and closing cylinder can extend and retract through the feeding support plate, and the end of the telescopic shaft is hinged at intervals to the bottom surface of the hollow membrane frame on both sides of the feeding plate. This is used to drive the separation and contact between the sealing membrane and the annular sealing ring on the hollow membrane frame.

4. The 3D shoe upper vacuum bonding machine with a positive pressure system according to claim 3, characterized in that, The negative pressure system is a vacuum pump.

5. The 3D shoe upper vacuum bonding machine with a positive pressure system according to claim 3, characterized in that, The buffer mechanism includes several buffer posts spaced apart on the top surface of the corresponding X-axis connecting plate, and several buffer sleeves arranged in a rectangular array on the bottom surface of the feeding support plate. The buffer posts correspond one-to-one with the buffer sleeves. Each buffer post passes through the corresponding buffer sleeve and slides in cooperation with the feeding support plate. A buffer spring is installed inside the buffer sleeve, and the two ends of the buffer spring elastically abut against the X-axis connecting plate and the feeding support plate, respectively.

6. The 3D shoe upper vacuum bonding machine with a positive pressure system according to claim 3, characterized in that, The machine is also equipped with a heat insulation component, and the heat insulation film of the heat insulation component is detachably connected to the X-axis connecting plate through a locking mechanism; The heat insulation component includes two heat insulation connecting plates spaced apart on the top surface of the workbench. A membrane fixing rod is fixedly connected between the two heat insulation connecting plates. A membrane placement drum is also rotatably arranged between the two heat insulation connecting plates. A heat insulation film is wound on the membrane placement drum. A spring is sleeved on the membrane fixing rod. One end of the spring is fixedly connected to the outer wall of the membrane fixing rod, and the other end of the spring is fixedly connected to the inner wall of the membrane placement drum. The rewinding force generated by the spring is opposite to the outward movement direction of the heat insulation film. The locking mechanism includes locking connecting blocks respectively disposed on the top surface of the belt clamping plate on the left side of the two X-axis connecting plates. The top surfaces of the two locking connecting blocks are respectively fixedly connected to the lower locking plates. The top surfaces of the two lower locking plates are respectively fastened to the upper locking plates by locking bolts. A membrane material mounting plate is detachably clamped between the lower locking plates and the upper locking plates. The membrane material mounting plate is used to clamp and connect with the end of the heat insulation film. The membrane mounting plate also includes an upper clamping plate that contacts the upper locking plate and a lower clamping plate that contacts the lower locking plate. The lower clamping plate and the upper clamping plate are clamped together by several fastening bolts to hold the end of the heat insulation film.

7. The 3D shoe upper vacuum bonding machine with a positive pressure system according to claim 6, characterized in that, At least one support column is also provided on the machine platform below the positive air pressure component. The height of the support column is between the X-axis connecting plate and the membrane mounting plate. During operation, the top of the support column can abut against the bottom surface of the feeding support plate.

8. The 3D shoe upper vacuum bonding machine with a positive pressure system according to claim 3, characterized in that, The positive air pressure assembly includes several positive pressure connecting columns arranged in a rectangular array on the top surface of the workbench. A positive pressure connecting plate is fixedly connected to the top surface of the positive pressure connecting columns. A booster cylinder is set at the center of the top surface of the positive pressure connecting plate. The end of the telescopic shaft of the booster cylinder can extend and retract through the positive pressure connecting plate and is fixedly connected to the positive pressure mounting plate. A positive pressure sealing plate is fixedly connected to the bottom surface of the positive pressure mounting plate through several positive pressure connecting rods arranged in a rectangular array. A positive pressure groove corresponding to the negative pressure groove for discharging material is opened at the center of the bottom surface of the positive pressure sealing plate. The four edges of the bottom surface of the positive pressure sealing plate are aligned and fitted with the four edges of the top surface of the discharging plate. After the positive pressure sealing plate is pressed down to tighten the annular sealing ring, a positive pressure space is formed in the positive pressure groove. The positive pressure sealing plate has a rectangular array of positive pressure vent holes on its bottom surface inside the positive pressure groove, and a rectangular array of positive pressure connection holes on its top surface that communicate with the positive pressure vent holes. The top surface of the positive pressure mounting plate is arranged in a rectangular array with several positive pressure guide posts, which slide in conjunction with the positive pressure connecting plate.

9. The 3D shoe upper vacuum bonding machine with a positive pressure system according to claim 1, characterized in that, The heating assembly includes several heating connection columns arranged in a rectangular array on the top surface of the workbench. An oven is fixedly connected to the top surface of the heating connection columns. The oven is used to heat the colloid placed on the feeding fixture at high temperature. An inlet and outlet opening is provided on the front side of the oven for the feeding fixture to pass through.

10. The 3D shoe upper vacuum bonding machine with a positive pressure system according to claim 3, characterized in that, The top surface of the feeding mold is provided with a glue placement groove. The shoe material includes fabric and glue. The glue placement groove is used to place the glue. The fabric is placed on the top surface of the feeding mold and comes into contact with the glue. The breathable support mesh is made of Teflon, the fabric can be either cloth or leather, and the gel is thermoplastic polyurethane elastomer.

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