Integrally-formed upper-connected film suction injection molding shoe and manufacturing method thereof

Abstract

The invention relates to the technical field of shoemaking, and provides an integrally-formed upper-connected film-absorbing injection-molded shoe and a manufacturing method thereof.The integrally-formed upper-connected film-absorbing injection-molded shoe comprises a vamp and a sole and further comprises that the sole is arranged at the bottom of the vamp in an attached mode, and the sole is made of a bio-based thermoplastic polyurethane material; the inner seeping edge strip is adhered to the edge of the bottom of the vamp; a plurality of infiltration anchoring grooves are formed in the bottom end of the inner infiltration edge strip at equal intervals, an air bag layer is arranged on the contact face of the inner side of the inner infiltration edge strip, the air bag layer is composed of TPU air bag arrays with the diameter being 3-5 mm, and the thickness of each air bag is 0.5 mm; the interface coupling film is arranged between the vamp and the sole and located on the lower portion of the inner seeping edge strip. When the interface coupling film is used, through the synergistic effect of a gradient composite structure of the interface coupling film and a vacuum adsorption process, a molten material permeates into an inner permeation edge strip anchoring groove to form mechanical interlocking, the problems that a film layer is prone to yellowing and an interface is prone to glue failure are solved, meanwhile, a mold table is improved, and continuous replacement and accurate positioning of the film are achieved.

Description

Technical Field

[0001] The present invention relates to the field of shoe manufacturing, and more specifically, to an integrally molded one-piece suction film injection-molded shoe and a manufacturing method thereof. Background Art

[0002] With the development of the shoe manufacturing industry, plastic shoes have become the mainstream category due to their advantages such as strong durability, low cost, and diverse shapes. The emerging one-piece injection molding technology in recent years directly injects molten plastic into the mold at the bottom of the shoe upper, realizing the one-piece molding of the upper and sole. This not only solves the problem of delamination of traditional glued shoes but also simplifies the production process.

[0003] The commonly used combination of polyurethane AB glue and PP film in existing one-piece injection-molded shoes has poor yellowing resistance of the PP film. It is easy to oxidize and turn yellow after contacting sweat or moisture, resulting in a shortened appearance life of the product. Due to the modulus difference (hard glue and soft film) between the AB glue and the PP film, interfacial stress concentration occurs, and it is easy to delaminate after long-term use. At the same time, the replacement of the existing film depends on manual operation one by one, with poor process coherence and low operation efficiency, affecting the overall production capacity.

[0004] Therefore, this application proposes an integrally molded one-piece suction film injection-molded shoe and a manufacturing method thereof to solve the above problems. Summary of the Invention

[0005] Technical Problems to be Solved: Aiming at the problems existing in the prior art, the purpose of the present invention is to provide an integrally molded one-piece suction film injection-molded shoe and a manufacturing method thereof, which solve the problems of yellowing and delamination of the film layer at the connection between the sole and the upper of the existing one-piece injection-molded shoes, and the low efficiency of manual film replacement.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: An integrally molded one-piece suction film injection-molded shoe and a manufacturing method thereof, including an upper and a sole, and further including: The bottom of the upper is adhesively attached to the sole, and the sole is made of a bio-based thermoplastic polyurethane material; an infiltration edge strip, adhesively bonded to the bottom edge of the upper; a plurality of infiltration anchoring grooves are equidistantly opened at the bottom end of the infiltration edge strip, an airbag layer is arranged on the inner contact surface of the infiltration edge strip, and the airbag layer is composed of a TPU airbag array with a diameter of 3 - 5 mm, and the thickness of a single airbag is 0.5 mm; an interface coupling film, arranged between the upper and the sole and located below the infiltration edge strip; the edge of the interface coupling film is embedded in the infiltration anchoring grooves of the infiltration edge strip, and the interface coupling film is integrally molded with the sole.

[0007] In a new embodiment, the bio-based thermoplastic polyurethane material contains 35 - 45 wt% of castor oil derivatives, and its Shore hardness is 60A - 70A.

[0008] In a new embodiment, the interface coupling film is a gradient composite structure, and from top to bottom, it is successively a polyamide fiber substrate layer, a hot melt adhesive transition layer, and a microporous TPU functional layer.

[0009] In a new embodiment, it further includes a mold table; a fixed mold fixedly installed on the top of the mold table; a movable mold liftably arranged above the fixed mold and forming a covering fit with the fixed mold; two sets of mounting frames respectively bolted to the front and rear parts of the fixed mold; a connecting rod rotatably installed in the middle of the mounting frame, with a film roll sleeved on the connecting rod, the film roll being composed of a plurality of film sheets connected together, a tearing dotted line being arranged between adjacent two film sheets, and a film strip being adhered to the bottom of the film sheet; a guiding member installed on the upper part of the mounting frame, including two parallel guiding rollers; a pressing-down assembly installed on the top of the mold table for driving the movable mold and the fixed mold to perform a mold-closing action; an air-extracting assembly integrated inside the fixed mold; and an adsorption assembly arranged at the bottom of the movable mold and communicated with the air-extracting assembly, the adsorption assembly generating an adsorption force in response to the vacuum extraction action of the air-extracting assembly.

[0010] In a new embodiment, a shoe cavity is formed in the middle of the top end of the fixed mold.

[0011] In a new embodiment, a shoe through cavity is formed in the middle of the movable mold, and internal threaded columns are installed at the four corners of the top end of the movable mold.

[0012] In a new embodiment, the pressing-down assembly includes: an inverted L-shaped plate frame vertically fixed on the top of the mold table; a hydraulic rod vertically installed on the top of the inverted L-shaped plate frame; a parallel plate horizontally arranged below the hydraulic rod and fixedly connected to the telescopic end of the hydraulic rod; four double-headed threaded columns threadedly installed at the four corners of the bottom of the parallel plate, and the lower ends thereof are threadedly connected to the internal threaded columns at the four corners of the top of the movable mold; and an internal shoe mold fixed to the bottom of the parallel plate.

[0013] In a new embodiment, the air-extracting assembly includes: an annular air pipe embedded inside the fixed mold and arranged along the outer periphery of the shoe cavity to form an annular air path structure surrounding the shoe cavity; an air-extracting pipe, one end of which is communicated with the annular air pipe and the other end of which is communicated with the shoe cavity; an exhaust connecting pipe, one end of which is communicated with the annular air pipe and the other end of which extends to the outside of the fixed mold and is connected to an external air-extracting pump through an external pipeline; and a plurality of vertical connecting valve pipes installed on the top surface of the fixed mold, and the bottoms of the vertical connecting valve pipes are all connected to the top of the annular air pipe.

[0014] In a new embodiment, the adsorption assembly includes: a plurality of guiding cavities vertically formed at the bottom of the movable mold and coaxially corresponding to the vertical connecting valve pipes located on the fixed mold; a locking column slidably installed in the guiding cavity; the top of the locking column is connected to the top wall of the guiding cavity through a return spring, and a sealing ring is installed outside the locking column.

[0015] Manufacturing method of integrally formed combined suction film injection-molded shoes, adopting the described integrally formed combined suction film injection-molded shoes, comprising the following steps:

[0016] S1. Film positioning and pre-tensioning: Install the film roll on the front connecting rod, release the film sheet by rotating the connecting rod, guide the film sheet to the top surface of the fixed mold through the guide roller, lay and cover the top of the shoe cavity, and then receive it by rotating the rear connecting rod;

[0017] S2. Vacuum adsorption: Start the air extraction component to extract the air in the shoe cavity, so that the film sheet is tightly adsorbed against the inner wall of the shoe cavity, and inject molten bio-based thermoplastic polyurethane material into it;

[0018] S3. Adsorption and compaction: Start the downward pressure component to drive the moving mold to close with the fixed mold. The upper surface installed on the downward pressure component contacts and compacts the molten sole in the shoe cavity to complete the connection of the upper surface and the sole. And the adsorption component is triggered by the air extraction component, and the negative pressure drives the moving mold and the fixed mold to be further tightly closed;

[0019] S4. Curing and demolding: After cooling the mold to 40 - 60 °C, the air extraction component releases pressure to cancel the negative pressure adsorption state of the adsorption component. Start the downward pressure component to lift the completed shoes in the moving mold. The film sheet is synchronously separated from the moving mold due to the tearing dotted line, and the bottom film strip is received by rotating the rear connecting rod, and the pulling of the next film sheet is carried out, thereby completing the demolding of the plastic shoes.

[0020] Beneficial effects: Compared with the prior art, the advantages of the present invention are as follows: 1. By setting the sole to adopt bio-based thermoplastic polyurethane, it has high resilience, wear resistance and flexible support, meets the long-term wearing requirements, and reduces the environmental burden at the same time.

[0021] 2. By setting the gradient composite structure of the interface coupling film and combining the vacuum adsorption process, the molten material penetrates into the anchoring groove of the inner penetration edge strip to form mechanical interlocking, solving the problems of yellowing at the joint and easy glue opening caused by the combination of polyurethane AB glue and PP film in the traditional process. And the TPU airbag layer on the inner side of the inner penetration edge strip deforms adaptively under the action of foot pressure, reducing the contact discomfort at the connection between the foot and the upper surface and the sole.

[0022] 3. By setting the film roll conveying structure and the structural improvement of the film roll itself, the replacement of the film sheet is stably promoted, the rapid separation and continuous conveying of the film sheet are realized, the production continuity is guaranteed, and the production efficiency is improved.

[0023] 4. Through the coordinated action of the air extraction component and the adsorption component, on the one hand, the sealing performance of the mold closing is improved by the vacuum negative pressure during mold closing to eliminate the residual air. On the other hand, the film sheet is also compacted so that it will not deviate during the vacuum adsorption stage, effectively ensuring the filling of the subsequent sole injection molding material, and the qualified rate of the finished product is significantly improved.

[0024] 5. The moving die and the downward pressing component are detachably connected by double-headed threaded columns, enabling quick die replacement without tools. The hydraulic drive symmetrically presses at the four corners of the parallel plate, avoiding deformation or damage caused by stress concentration and reducing the risk of die damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the split structure of the upper and sole of the present invention.

[0026] Figure 2 It is a schematic diagram of the position structure of the inner seepage strip of the present invention.

[0027] Figure 3 It is a schematic diagram of the inner seepage strip structure of the present invention.

[0028] Figure 4 It is a schematic diagram of the position structure of the airbag layer of the present invention.

[0029] Figure 5 It is a schematic diagram of the interface coupling film structure of the present invention.

[0030] Figure 6 It is a schematic diagram of the die table structure of the present invention.

[0031] Figure 7 It is a schematic diagram of the downward pressing component structure of the present invention.

[0032] Figure 8 It is a schematic diagram of the position structure of the mounting bracket of the present invention.

[0033] Figure 9 It is a schematic diagram of the moving die structure of the present invention.

[0034] Figure 10 It is a schematic diagram of the fixed die structure of the present invention.

[0035] Figure 11 It is a schematic diagram of the mounting bracket structure of the present invention.

[0036] Figure 12 It is a schematic diagram of the guide part structure of the present invention.

[0037] Figure 13 It is a schematic diagram of the air extraction component structure of the present invention.

[0038] Figure 14 It is a schematic diagram of the adsorption component structure of the present invention.

[0039] Figure 15 It is a schematic diagram of the film roll structure of the present invention.

[0040] The reference numerals in the figure are: 1, shoe upper; 2, shoe sole; 3, inner infiltration strip; 31, infiltration anchorage groove; 32, airbag layer; 4, interface coupling film; 41, polyamide fiber substrate layer; 42, hot melt adhesive transition layer; 43, microporous TPU functional layer; 5, mold table; 6, fixed mold; 61, shoe cavity; 7, moving mold; 71, shoe through cavity; 72, internal threaded column; 8, mounting bracket; 9, connecting rod; 10, film roll; 101, film sheet; 102, tearing dotted line; 103, film strip; 11, guiding member; 111, guiding roller; 12, pressing-down assembly; 1201, inverted L-shaped plate frame; 1202, hydraulic rod; 1203, parallel plate; 1204, double-headed threaded column; 1205, built-in shoe mold; 13, air extraction assembly; 1301, annular air pipe; 1302, air extraction pipe; 1303, exhaust connection pipe; 1304, vertical connection valve pipe; 14, adsorption assembly; 1401, guiding cavity; 1402, locking column; 1403, return spring; 1404, sealing ring. Detailed implementation mode

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0042] By providing an integrally formed combined suction film injection-molded shoe and its manufacturing method in the embodiments of the present application, the problems that the film layer at the joint of the shoe sole and the shoe upper of the existing combined injection-molded shoe is prone to yellowing and delamination, and the efficiency of manually replacing the film is low are solved. When the present invention is in use, through the synergistic effect of the gradient composite structure of the interface coupling film and the vacuum adsorption process, the molten material infiltrates into the infiltration anchorage groove of the inner infiltration strip to form a mechanical interlock, solving the problems of easy yellowing of the film layer and easy delamination at the interface. At the same time, the mold table is improved to realize the continuous replacement and precise positioning of the film sheet.

[0043] The technical solutions in the embodiments of the present application are as follows in general idea to solve the above technical problems.

[0044] Embodiment 1:

[0045] Please refer to Figures 1 - 5, this embodiment provides an integrally molded one-piece suction film injection-molded shoe, including a shoe upper 1 and a sole 2, and further including: the sole 2 is adhesively attached to the bottom of the shoe upper 1, and the sole 2 is made of a bio-based thermoplastic polyurethane material; an infiltration edge strip 3 is bonded to the bottom edge of the shoe upper 1; a plurality of infiltration anchorage grooves 31 are equidistantly opened at the bottom end of the infiltration edge strip 3, and an airbag layer 32 is arranged on the inner contact surface of the infiltration edge strip 3. The airbag layer 32 is composed of a TPU airbag array with a diameter of 3-5 mm, and the thickness of a single airbag is 0.5 mm; an interface coupling film 4 is arranged between the shoe upper 1 and the sole 2 and is located below the infiltration edge strip 3; the edge of the interface coupling film 4 is embedded in the infiltration anchorage grooves 31 of the infiltration edge strip 3, and the interface coupling film 4 is integrally formed with the sole 2.

[0046] First of all, the sole 2 is made of a bio-based thermoplastic polyurethane material, ensuring that the sole 2 has both high elasticity, wear resistance and tear resistance, meeting the functional requirements for long-term use.

[0047] Secondly, the edge of the interface coupling film 4 is embedded in the infiltration anchorage grooves 31 of the infiltration edge strip 3. Combining with the vacuum adsorption process, the molten material infiltrates into the anchorage grooves 31 to form a mechanical interlocking structure. At the same time, the gradient composite layer (polyamide fiber base layer 41 / hot melt adhesive transition layer 42 / microporous TPU functional layer 43) of the interface coupling film 4 realizes the material modulus transition, significantly improving the bonding strength between the shoe upper 1 and the sole 2, and solving the problems of yellowing and easy delamination at the joint caused by the combination of polyurethane AB glue and PP film in the traditional process.

[0048] At the same time, the airbag layer 32 on the inner side of the infiltration edge strip 3 is composed of a micro TPU airbag array, which generates self-adaptive deformation under foot pressure, effectively disperses the impact force and rebounds to store energy, reducing the touch discomfort at the connection between the foot and the shoe upper 1 and the sole 2.

[0049] Furthermore, the bio-based thermoplastic polyurethane material contains 35-45 wt% of castor oil derivatives, and its Shore hardness is 60A-70A. The application of this material enables the sole 2 to have the following characteristics: high resilience improves walking comfort; wear-resistant and damage-resistant, extending the service life; flexible support, adapting to the dynamic deformation of the foot.

[0050] Furthermore, the interface coupling film 4 is a gradient composite structure, and from top to bottom, it is successively a polyamide fiber base layer 41, a hot melt adhesive transition layer 42 and a microporous TPU functional layer 43. The interface coupling film 4 adopts the gradient composite structure of the polyamide fiber base layer 41, the hot melt adhesive transition layer 42 and the microporous TPU functional layer 43. Through the synergistic effect of each layer, high-strength support, breathable and waterproof balance and weather resistance optimization are achieved, making the connection between the shoe upper 1 and the sole 2 more stable and reliable.

[0051] Example 2:

[0052] Please refer to Figures 6 - 15As shown in the figure, an integrally formed one-piece suction film injection molded shoe further includes a mold table 5; a fixed mold 6 fixedly installed on the top of the mold table 5; a movable mold 7 which is arranged above the fixed mold 6 in a liftable manner and forms a covering fit with the fixed mold 6; two sets of mounting frames 8 which are respectively installed at the front and rear parts of the fixed mold 6 by bolts; a connecting rod 9 is rotatably installed in the middle of the mounting frame 8, one end of the connecting rod 9 is fixedly connected to the output end of a driving motor buried in the mounting frame 8, a film roll 10 is sleeved on the connecting rod 9, the film roll 10 is composed of a plurality of film sheets 101 connected together, a tearing dotted line 102 is arranged between two adjacent film sheets 101, and a film strip 103 is adhered to the bottom of the film sheet 101; a guiding member 11 is installed on the upper part of the mounting frame 8 and includes two parallel guiding rollers 111; a pressing-down assembly 12 is installed on the top of the mold table 5 and is used for driving the movable mold 7 and the fixed mold 6 to perform a mold closing action; an air extraction assembly 13 is integrated inside the fixed mold 6; an adsorption assembly 14 is arranged at the bottom of the movable mold 7 and is communicated with the air extraction assembly 13, and the adsorption assembly 14 generates an adsorption force in response to the vacuum extraction action of the air extraction assembly 13.

[0053] By providing the mounting frame 8, the connecting rod 9, the film roll 10, and the guiding member 11, a complete film roll 10 conveying system is constructed by using the modular design of the mounting frame 8, the rotating mechanism of the connecting rod 9 controlled by the driving motor, and the tension self-adjusting function of the guiding rollers 111; during the first operation, the film sheet 101 is manually pulled to complete path calibration to ensure that the film strip 103 is accurately aligned with the edge of the shoe cavity 61; after calibration, the film sheet 101 is automatically released to realize continuous and stable conveyance of the film sheet 101 on the top surface of the fixed mold 6, and the guiding rollers 111 finely adjust the film material tension in real time to achieve precise positioning, thereby improving production efficiency; and when the film material is offset or broken, the driving motor can stop immediately and give an alarm to avoid damage to the mold.

[0054] By providing the film sheet 101, the tearing dotted line 102, and the film strip 103, the film roll 10 uses the tearing dotted line 102 to connect the film sheets 101. After single forming, the film sheet 101 which is integrated with the shoe can be quickly separated, and the film strip 103 is left. Its function is that after the film sheet 101 is separated, the connecting rod 9 at the rear can rotate to collect the film strip 103, stably push the replacement of the film sheet 101, and ensure production continuity.

[0055] Please refer to Figure 9 and Figure 10 , a shoe cavity 61 is provided in the middle of the top end of the fixed mold 6; a shoe through cavity 71 is provided in the middle of the movable mold 7, and internal thread posts 72 are installed at the four corners of the top end of the movable mold 7.

[0056] The shoe cavity 61 centered in the fixed mold 6 ensures the uniform flow and filling of the injection material for the sole 2 in the mold, avoiding problems such as uneven thickness or edge material shortage caused by position deviation, and improving the forming accuracy of the sole 2. The shoe through cavity 71 opened in the middle of the moving mold 7 is in vertical alignment and cooperation with the shoe cavity 61. When the mold is closed, it accurately restricts the position of the upper shoe 1, preventing the upper shoe 1 from shifting or twisting, ensuring the consistency of the combination of the upper shoe 1 and the sole 2, and the internal threaded posts 72 facilitate the installation with the downward pressing component 12.

[0057] Please refer to Figure - Figure 9 The downward pressing component 12 includes: an inverted L-shaped plate frame 1201 vertically fixed on the top of the mold table 5; a hydraulic rod 1202 vertically installed on the top of the inverted L-shaped plate frame 1201; a parallel plate 1203 horizontally arranged below the hydraulic rod 1202 and fixedly connected to the telescopic end of the hydraulic rod 1202; four double-headed threaded posts 1204 threadedly installed at the four corners of the bottom of the parallel plate 1203, and their lower ends are threadedly connected to the internal threaded posts 72 at the four corners of the top of the moving mold 7; an internal shoe mold 1205 fixed to the bottom of the parallel plate 1203.

[0058] By setting the inverted L-shaped plate frame 1201, the hydraulic rod 1202, the parallel plate 1203, the double-headed threaded posts 1204 and the internal shoe mold 1205, a rigid support structure is formed by the vertical combination of the inverted L-shaped plate frame 1201 and the hydraulic rod 1202. The hydraulic rod 1202 drives the parallel plate 1203 to move up and down linearly. On the one hand, it drives the moving mold 7 connected to the parallel plate 1203 through the double-headed threaded posts 1204 to cover the fixed mold 6. On the other hand, it drives the upper shoe 1 placed on the internal shoe mold 1205 to accurately press against the sole 2 in the fixed mold 6. Among them, the four double-headed threaded posts 1204 are symmetrically distributed at the four corners of the parallel plate 1203 and are connected to the internal threaded posts 72 at the four corners of the top of the moving mold 7 through threads to achieve uniform pressure transmission, avoiding deformation of the sole 2 or mold damage caused by local stress concentration. At the same time, the double-headed threaded posts 1204 and the moving mold 7 are connected by detachable threads, and the moving mold 7 can be quickly replaced without tools, greatly shortening the downtime.

[0059] Please refer to Figure 13 and Figure 14 The air extraction component 13 includes: an annular air pipe 1301 embedded inside the fixed mold 6 and arranged along the outer periphery of the shoe cavity 61 to form an annular air path structure surrounding the shoe cavity 61; an air extraction pipe 1302, one end of which is connected to the annular air pipe 1301 and the other end is connected to the shoe cavity 61; an exhaust connection pipe 1303, one end of which is connected to the annular air pipe 1301 and the other end extends to the outside of the fixed mold 6 and is connected to an external air extraction pump through an external pipeline; a plurality of vertical connection valve pipes 1304 installed on the top surface of the fixed mold 6, and the bottoms of the vertical connection valve pipes 1304 are all connected to the top of the annular air pipe 1301.

[0060] By setting up the annular air pipe 1301, the air extraction pipe 1302, the exhaust connection pipe 1303 and the vertical connection valve pipe 1304, the annular air pipe 1301 forms a closed-loop air path around the shoe cavity 61. By means of the air extraction pipe 1302 and the exhaust connection pipe 1303, the air inside the shoe cavity 61 is quickly discharged, so that the diaphragm 101 laid on the top surface of the fixed mold 6 is adsorbed on the inner wall of the shoe cavity 61 under the effect of this air extraction. Secondly, with the distribution of multiple vertical connection valve pipes 1304, it can cooperate with the adsorption assembly 14 to improve the closing tightness of the moving mold 7 and the fixed mold 6. It should be noted that the vertical connection valve pipe 1304 is in the state of an electromagnetic valve pipe and can be manually controlled to open and close.

[0061] Please refer to Figure 14 , the adsorption assembly 14 includes: a plurality of guiding cavities 1401, which are vertically opened at the bottom of the moving mold 7 and are coaxially corresponding to the vertical connection valve pipes 1304 located on the fixed mold 6; a locking column 1402, which is slidably installed in the guiding cavity 1401; the top of the locking column 1402 is connected to the top wall of the guiding cavity 1401 through a return spring 1403, and a sealing ring 1404 is installed outside the locking column 1402.

[0062] By setting up the guiding cavity 1401, the locking column 1402, the return spring 1403 and the sealing ring 1404, the guiding cavity 1401 is coaxially corresponding to the vertical connection valve pipe 1304, which can automatically guide the locking column 1402 to be accurately aligned with the vertical connection valve pipe 1304 during mold closing. The sealing ring 1404 outside the locking column 1402 fits tightly with the pipe orifice, and the vacuum sealing efficiency is significantly improved. When the air is extracted inside the annular air pipe 1301 and the vertical connection valve pipe 1304, the negative pressure effect formed inside the pipe drives the locking column 1402 to slide downward in the guiding cavity 1401 and slide to the lowest part (i.e., the limit position of sliding movement), thereby forming a downward pressing force on the moving mold 7, and further making the fixed mold 6 and the moving mold 7 close more tightly. When the negative pressure inside the pipe disappears, it is reset by the return spring 1403, and the fixed mold 6 and the moving mold 7 are also in a separated state.

[0063] Embodiment 3:

[0064] Please refer to Figures 1 - 15 , this embodiment provides a manufacturing method of an integrally formed one-piece suction film injection molded shoe. An integrally formed one-piece suction film injection molded shoe is adopted, including the following steps:

[0065] S1. Film positioning and pre-tensioning; Install the film roll 10 on the front connecting rod 9, release the diaphragm 101 by rotating the connecting rod 9, the diaphragm 101 is guided by the guiding roller 111 to be laid flat on the top surface of the fixed mold 6 to cover the top of the shoe cavity 61, and then received by rotating the rear connecting rod 9;

[0066] S2. Vacuum adsorption: Start the air extraction component 13 to extract the air in the shoe cavity 61, so that the diaphragm 101 is tightly adsorbed against the inner wall of the shoe cavity 61, and inject the molten bio-based thermoplastic polyurethane material into it;

[0067] S3. Adsorption and compaction: Start the downward pressing component 12 to drive the moving mold 7 to cover the fixed mold 6. The upper shoe 1 installed on the downward pressing component 12 contacts and compacts the molten sole 2 in the shoe cavity 61 to complete the connection of the upper shoe 1 and the sole 2. And the adsorption component 14 is triggered by the air extraction component 13, and the negative pressure drives the moving mold 7 and the fixed mold 6 to be further tightly covered;

[0068] S4. Curing and demolding: After cooling the mold to 40 - 60 °C, the air extraction component 13 is depressurized to cancel the negative pressure adsorption state of the adsorption component 14. Start the downward pressing component 12 to lift the completed shoes in the moving mold 7. The diaphragm 101 synchronously detaches from the moving mold 7 due to the tearing dotted line 102, and the bottom film strip 103 is rotated and received by the rear connecting rod 9, and the pulling of the next diaphragm 101 is carried out, thereby completing the demolding of the plastic shoes.

[0069] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrally formed film-injected shoe with an upper, comprising an upper (1) and a sole (2), characterized in that: Also includes: The bottom of the upper (1) is fitted with a sole (2), and the sole (2) is made of a bio-based thermoplastic polyurethane material; An inner seepage edge strip (3) bonded to the bottom edge of the upper (1); The bottom end of the infiltration edge strip (3) is provided with a plurality of infiltration anchoring grooves (31) at equal intervals, and the inner contact surface of the infiltration edge strip (3) is provided with an airbag layer (32), wherein the airbag layer (32) is composed of an array of TPU airbags with a diameter of 3-5 mm, and the thickness of a single airbag is 0.5 mm; An interface coupling membrane (4) is arranged between the upper (1) and the sole (2) and is located at the lower part of the infiltration edge strip (3); The edge of the interface coupling membrane (4) is embedded in the infiltration anchoring groove (31) of the infiltration edge strip (3), and the interface coupling membrane (4) and the sole (2) are integrally formed.

2. The one-piece upper film-absorbing injection-molded shoe according to claim 1, characterized in that: The bio-based thermoplastic polyurethane material contains 35-45 wt % of castor oil derivatives and has a Shore hardness of 60A-70A.

3. The one-piece upper film-absorbing injection-molded shoe according to claim 1, characterized in that: The interface coupling membrane (4) is a gradient composite structure, and comprises, from top to bottom, a polyamide fiber substrate layer (41), a hot melt adhesive transition layer (42), and a microporous TPU functional layer (43).

4. The one-piece upper film-absorbing injection-molded shoe according to claim 1, characterized in that: Also includes a mold table (5); A fixed mold (6) is fixedly mounted on the top of the mold table (5); The movable mold (7) is movably disposed above the fixed mold (6) and is in a covering fit with the fixed mold (6); The mounting frame (8) is provided with two groups and is respectively mounted on the front and rear parts of the fixed mold (6) by bolts; A connecting rod (9) is rotatably mounted in the middle of the mounting frame (8), one end of the connecting rod (9) is fixedly connected to the output end of a driving motor buried in the mounting frame (8), a film roll (10) is sleeved on the connecting rod (9), the film roll (10) is composed of a plurality of film sheets (101) connected together, a tearing dotted line (102) is provided between two adjacent film sheets (101), and a film strip (103) is bonded to the bottom of the film sheet (101); A guide member (11) is mounted on the upper portion of the mounting frame (8), and comprises two guide rollers (111) arranged in parallel; A pressing assembly (12) is installed on the top of the mold table (5) and is used to drive the movable mold (7) and the fixed mold (6) to perform a mold closing action; An air extraction component (13) is integrated inside the fixed mold (6); The adsorption component (14) is arranged at the bottom of the movable mold (7) and is connected to the vacuum component (13). The adsorption component (14) generates adsorption force in response to the vacuum extraction action of the vacuum component (13).

5. The one-piece upper film-absorbing injection-molded shoe according to claim 4, characterized in that: A shoe-shaped cavity (61) is provided in the middle of the top end of the fixed mold (6).

6. The one-piece upper film-absorbing injection-molded shoe according to claim 4, characterized in that: A shoe through cavity (71) is provided in the middle of the movable mold (7), and internal threaded columns (72) are installed at the four corners of the top end of the movable mold (7).

7. The one-piece upper film-absorbing injection-molded shoe according to claim 4, characterized in that: The pressing assembly (12) comprises: An inverted L-shaped plate frame (1201) is vertically fixed on the top of the mold table (5); A hydraulic rod (1202) is vertically mounted on the top of the inverted L-shaped frame (1201); A parallel plate (1203) is horizontally arranged below the hydraulic rod (1202) and fixedly connected to the telescopic end of the hydraulic rod (1202); There are four double-ended threaded columns (1204), which are threadedly mounted at the four corners of the bottom of the parallel plate (1203), and whose lower ends are threadedly connected to the internal threaded columns (72) at the four corners of the top of the movable mold (7); The built-in shoe mold (1205) is fixed to the bottom of the parallel plate (1203).

8. The one-piece upper film-absorbing injection-molded shoe according to claim 4, characterized in that: The air extraction component (13) comprises: An annular air pipe (1301) is embedded in the fixed mold (6) and arranged along the outer periphery of the shoe cavity (61) to form an annular air path structure surrounding the shoe cavity (61); An air extraction pipe (1302), one end of which is in communication with the annular air pipe (1301), and the other end of which is in communication with the shoe cavity (61); An exhaust pipe (1303), one end of which is in communication with the annular air pipe (1301), and the other end of which extends to the outside of the fixed mold (6) and is connected to an external air pump through an external pipe; There are multiple vertical valve pipes (1304) installed on the top surface of the fixed mold (6), and the bottoms of the vertical valve pipes (1304) are connected to the top of the annular air pipe (1301).

9. The one-piece upper film-absorbing injection-molded shoe according to claim 4, characterized in that: The adsorption component (14) comprises: A plurality of guide cavities (1401) are provided, which are vertically opened at the bottom of the movable mold (7) and coaxially correspond to the vertical valve tube (1304) located on the fixed mold (6); A locking column (1402) is slidably mounted in the guide cavity (1401); The top of the locking column (1402) is connected to the top wall of the guide cavity (1401) via a return spring (1403), and a sealing ring (1404) is installed outside the locking column (1402).

10. A method for manufacturing an integrally formed upper film-absorbing injection molded shoe, characterized in that: The one-piece upper film-absorbing injection-molded shoe according to any one of claims 1 to 9 comprises the following steps: S1, film positioning and pre-tensioning; the film roll (10) is mounted on the front connecting rod (9), and the film sheet (101) is released by rotating the connecting rod (9), and the film sheet (101) is guided to the top surface of the fixed mold (6) by the guide roller (111) to cover the top of the shoe cavity (61), and then received by the rear connecting rod (9) by rotation; S2, vacuum adsorption: starting the vacuum assembly (13) to extract the air in the shoe mold cavity (61), so that the diaphragm (101) is closely attached to the inner wall of the shoe mold cavity (61) and adsorbed, and molten bio-based thermoplastic polyurethane material is injected therein; S3, adsorption and compaction; the pressing component (12) is started to drive the movable mold (7) and the fixed mold (6) to cover each other, so that the upper (1) installed on the pressing component (12) and the molten sole (2) in the shoe mold cavity (61) are contacted and compacted to complete the connection between the upper (1) and the sole (2), and the adsorption component (14) is triggered by the vacuum component (13), and the negative pressure drives the movable mold (7) and the fixed mold (6) to further cover each other tightly; S4, solidification and demoulding: after the mold is cooled to 40-60°C, the vacuum component (13) releases the pressure, so that the adsorption component (14) cancels the negative pressure adsorption state, and the pressing component (12) is started to lift the completed shoe in the movable mold (7). The membrane (101) is synchronously separated from the movable mold (7) due to the tearing of the virtual line (102), leaving the bottom membrane strip (103) to be received by the rear connecting rod (9) and the next membrane (101) is pulled, thereby completing the demoulding of the plastic shoe.

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