Vacuum-pumping film coating device for blank film of shoe insole

Abstract

The utility model relates to the technical field of vacuum film coating, in particular to a shoe insole blank film vacuumizing film coating device which is used for coating a plastic film on a bottom blank and comprises a main machine body, a vacuum assembly used for placing the bottom blank is arranged on the main machine body, and a plastic film fixing assembly is arranged right above the vacuum assembly. A glue coating device is arranged between the vacuum assembly and the plastic film fixing assembly, a plastic film body is arranged in the plastic film fixing assembly, the glue coating device comprises a glue coating plate capable of coating glue to the bottom of the plastic film body, and the glue coating plate can reciprocate in the width direction of the plastic film body. By arranging the gluing device, automatic gluing on the plastic film body is achieved, and the problem that the film coating effect is poor due to the fact that the positions of manual gluing are different every time is solved.

Description

Technical Field

[0001] This utility model relates to the field of vacuum wrapping technology, specifically a vacuum wrapping device for shoe midsole preforms. Background Technology

[0002] In shoe manufacturing, the wrapping of the midsole (also known as the midsole plate) is a crucial step. Its main purpose is to coat the exposed midsole material (such as foamed EVA, PU, ​​TPU, etc.) with a decorative film. This film not only enhances the appearance but also provides waterproofing, stain resistance, increased abrasion resistance, and maintains the stability of the midsole shape. Traditional wrapping processes are mostly done manually or semi-automatically, using adhesives or simple heat pressing. This method is inefficient, has poor bonding precision, and is prone to problems such as bubbles, wrinkles, and edge delamination, severely affecting the product's appearance quality and durability.

[0003] Existing vacuum wrapping devices typically consist of a lower mold cavity to accommodate the insole preform, an upper mold providing heating and pressure, and a vacuum system. The general workflow is as follows: the film material is placed over the preform and the edges are secured; after mold closing, a vacuum is applied, using negative pressure to force the film material to adhere tightly to the complex three-dimensional curved surface of the preform; simultaneously, heating is used to soften and shape the film material. However, when processing films made of color-migration fluorescent leather, polyvinyl chloride, polyethylene, polypropylene, polystyrene, and other resins, existing devices have the following problems: During the wrapping process, a layer of adhesive needs to be applied to specific areas of the film. This is generally done manually; however, manual application is inefficient and prone to variations in application location, potentially affecting the final wrapping effect. Utility Model Content

[0004] The purpose of this invention is to provide a vacuum wrapping device for shoe midsole preform film. By setting up an adhesive applicator, the device can automatically apply adhesive to the plastic film body, thus solving the problem that the coating effect is poor because the position of the adhesive is different each time when it is applied manually.

[0005] To address the problems of existing technologies, this utility model provides a vacuum wrapping device for shoe midsole preforms, which wraps a plastic film around the preform. The device includes a main body with a vacuum assembly for placing the preform. A plastic film fixing assembly is positioned directly above the vacuum assembly. An adhesive applicator is located between the vacuum assembly and the plastic film fixing assembly. The plastic film fixing assembly contains a plastic film body. The adhesive applicator includes an adhesive applicator plate capable of applying adhesive to the bottom of the plastic film body, and the adhesive applicator plate can reciprocate along the width direction of the plastic film body.

[0006] Preferably, the adhesive applicator includes a support shell, and a third telescopic drive member is vertically arranged in the support shell, the output end of the third telescopic drive member being connected to the bottom of the adhesive applicator plate.

[0007] Preferably, the adhesive applicator further includes a rotary drive component capable of reciprocating along the length of the support shell, the output end of which is connected to the support shell.

[0008] Preferably, the glue application device further includes a support frame fixed on the main body, and a fourth telescopic drive component for driving the glue application plate to reciprocate along its length direction is installed on the support frame. The output end of the fourth telescopic drive component is connected to the rotary drive component, and a glue box for storing glue is also provided on the support frame.

[0009] Preferably, the vacuum assembly includes a lifting plate that can move up and down, and the interior of the lifting plate is a cavity. The lifting plate is also evenly provided with a number of air holes communicating with the cavity, and the exterior of the lifting plate has a pipe interface communicating with the cavity. The edge of the lifting plate has a sealing gasket.

[0010] Preferably, the vacuum assembly further includes a first telescopic drive component vertically disposed in the main body, the output end of the first telescopic drive component passing through the table surface of the main body and connected to the bottom of the lifting plate.

[0011] Preferably, the main body is provided with support columns at the four corners of the top, the plastic film fixing assembly is provided with support frames fixed on the support columns, the plastic film fixing assembly is provided with pressure frames provided directly above the support frames, the plastic film body is placed between the support frames and the pressure frames, and the plastic film fixing assembly is provided with a second telescopic drive member provided vertically for driving the pressure frames to move up and down.

[0012] Preferably, an oven for heating the plastic film body is fixed to the top of the support column.

[0013] The advantages of this invention compared to existing technologies are as follows: By setting up a glue-applying device, this application achieves automated glue-applying operations on the plastic film body, effectively ensuring the consistency of the glue-applying position each time, and fundamentally avoiding the technical defects of manual glue-applying. Specifically, the glue-applying plate of the glue-applying device first extends into the glue tank according to a preset program, ensuring that the glue-applying surface of the plate can pick up sufficient glue, guaranteeing the basic effect of glue application; after the glue-applying process is completed, the glue-applying plate performs a flipping action, so that the glue-applying surface faces the bottom of the plastic film body, and then the glue-applying plate smoothly extends into the bottom area of ​​the plastic film body and adheres to the bottom surface of the plastic film body. Afterwards, the glue-applying plate performs a reciprocating linear movement, uniformly and stably applying glue to the preset glue-applying area on the bottom of the plastic film body. This automated adhesive application structure and operation method not only significantly improves the efficiency of adhesive application, solving the problems of low efficiency and high labor intensity of traditional manual adhesive application, but also completely eliminates the drawback of inconsistent adhesive application areas each time during manual application. It effectively avoids the adverse effects of adhesive application deviation on subsequent coating processes, ensuring the stability and quality of subsequent coating operations. Attached Figure Description

[0014] Figure 1 This is a first three-dimensional structural schematic diagram of a vacuum wrapping device for shoe midsole preforms according to the present invention;

[0015] Figure 2 This is a second three-dimensional structural schematic diagram of a vacuum wrapping device for shoe midsole preforms according to the present invention;

[0016] Figure 3 This is a three-dimensional structural diagram of a vacuum wrapping device for shoe midsole preforms according to this utility model;

[0017] Figure 4 This is an exploded structural diagram of a vacuum wrapping device for shoe midsole preforms according to this utility model;

[0018] Figure 5 This is a three-dimensional structural diagram of the adhesive coating device of a vacuum coating device for shoe midsole preform.

[0019] The components in the diagram are labeled as follows: 1. Main body; 2. Vacuum assembly; 21. Lifting plate; 211. Air vent; 22. Pipe interface; 23. First telescopic drive component; 24. Sealing gasket; 3. Plastic film fixing assembly; 31. Support frame; 32. Plastic film body; 33. Pressing frame; 34. Second telescopic drive component; 4. Glue applicator; 41. Glue applicator plate; 42. Support shell; 43. Third telescopic drive component; 44. Rotation drive component; 45. Fourth telescopic drive component; 46. Support frame; 47. Glue box; 5. Oven. Detailed Implementation

[0020] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0021] Reference Figures 1 to 5 As shown, this utility model provides a vacuum wrapping device for shoe midsole preforms, which wraps a plastic film around the preform. The device includes a main body 1, a vacuum assembly 2 for placing the preform, and a plastic film fixing assembly 3 positioned directly above the vacuum assembly 2. An adhesive applicator 4 is located between the vacuum assembly 2 and the plastic film fixing assembly 3. The plastic film fixing assembly 3 contains a plastic film body 32. The adhesive applicator 4 includes an adhesive applicator plate 41 capable of applying adhesive to the bottom of the plastic film body 32, and the adhesive applicator plate 41 can reciprocate along the width direction of the plastic film body 32. The adhesive applicator plate 41 can take various forms, including flexible sheet material and brushes.

[0022] First, the shoe midsole blank to be coated is placed in the preset placement position of the vacuum component 2 and positioned. Simultaneously, the plastic film body 32 is installed and securely fixed in the plastic film fixing component 3, ensuring the initial positional accuracy of the plastic film body 32. Then, the adhesive applicator 4 starts working, applying adhesive to the bottom area of ​​the plastic film body 32 through its adhesive applicator plate 41. During the adhesive applicator process, the adhesive applicator plate 41 moves back and forth along the width direction of the plastic film body 32, ensuring the adhesive is evenly distributed on the bottom of the plastic film body 32, completing the automated adhesive applicator process. After the adhesive applicator process is completed, the vacuum component 2 rises and activates its vacuum function, creating a negative pressure environment in the working area where the shoe midsole blank is placed. Under the suction effect of the negative pressure, the plastic film body 32 on the plastic film fixing component 3 hangs downwards, gradually and tightly adhering to the outer surface of the shoe midsole blank on the vacuum component 2, achieving initial negative pressure bonding between the plastic film and the shoe midsole blank.

[0023] The glue application device 4 includes a support shell 42, and a third telescopic drive member 43 is vertically arranged in the support shell 42. The output end of the third telescopic drive member 43 is connected to the bottom of the glue application plate 41. The glue application device 4 also includes a rotary drive member 44 that can reciprocate along the length direction of the support shell 42, and the output end of the rotary drive member 44 is connected to the support shell 42. The glue application device 4 also includes a support frame 46 fixed on the main body 1. A fourth telescopic drive member 45 for driving the glue application plate 41 to reciprocate along its length direction is installed on the support frame 46. The output end of the fourth telescopic drive member 45 is connected to the rotary drive member 44. A glue tank 47 for storing glue is also provided on the support frame 46.

[0024] The glue application device 4 is an integrated drive and execution structure, specifically composed of a glue application plate 41, a support shell 42, a third telescopic drive component 43, a rotary drive component 44, a fourth telescopic drive component 45, a support frame 46, and a glue tank 47. These components are connected and coordinated in a modular manner, providing power drive and positioning for the glue application plate 41's actions of dipping, flipping, and applying glue. The support frame 46, as the basic support component of the glue application device 4, is fixedly mounted on the main body 1 and serves as the mounting carrier for the entire glue application device 4. The support frame 46 is also equipped with the fourth telescopic drive component 45 and the glue tank 47. The glue tank 47 provides glue storage space for the glue application process and is specifically used to store the glue required for the glue application operation. The fourth telescopic drive component 45 is a horizontal movement drive component of the glue application device 4. Its output end is connected to the rotary drive component 44, which can drive the rotary drive component 44 to reciprocate linearly along the length of the support frame 46. The rotary drive component 44 can reciprocate synchronously with the support shell 42 along its length. At the same time, the output end of the rotary drive component 44 is fixedly connected to the support shell 42, serving as a flipping drive component. It can drive the support shell 42 to rotate the glue application plate 41, providing power for the glue application plate 41 to switch from the glue-dipping posture to the glue application posture. The third telescopic drive component 43 can drive the glue application plate 41 to move vertically up and down, realizing the vertical position adjustment of the glue application plate 41, thereby meeting the height position requirements of the glue application plate 41 when dipping glue into the glue tank 47 and applying glue to the bottom of the plastic film body 32. The coordinated operation of each drive component can realize the horizontal and vertical position adjustment of the glue application plate 41 and the switching of the flipping action, ensuring the continuity of the glue dipping and application operations of the glue application plate 41.

[0025] The main body 1 has four vertical support columns at the top corners. The plastic film fixing assembly 3 also includes a support frame 31 fixed on the support column. The plastic film fixing assembly 3 also includes a pressure frame 33 set directly above the support frame 31. The plastic film body 32 is placed between the support frame 31 and the pressure frame 33. The plastic film fixing assembly 3 also includes a second telescopic drive member 34 set vertically for driving the pressure frame 33 to move up and down.

[0026] The plastic film body 32 is placed between the support frame 31 and the pressure frame 33. It is the core forming carrier for the shoe midsole wrapping operation. Its material, thickness and size are all adapted to the specifications of the insole to be wrapped. Under the clamping and fixing of the pressure frame 33 and the support frame 31, the plastic film body 32 remains flat and taut, providing a stable glue coating working surface for the glue coating plate 41 of the glue coating device 4, ensuring that the glue can be evenly coated to the preset area on the bottom. Subsequently, under the negative pressure of the vacuum component 2, it can be quickly adhered to the outer surface of the insole to complete the wrapping.

[0027] The vacuum assembly 2 includes a vertically movable lifting plate 21, the interior of which is a cavity. Several air holes 211 are evenly distributed on the lifting plate 21, communicating with the cavity. The lifting plate 21 also has a pipe interface 22 on its exterior, communicating with the cavity. This pipe interface is a dedicated connection structure between the vacuum assembly 2 and an external vacuum pumping device. The external pumping device forms a closed airflow channel with the cavity of the lifting plate 21 through this pipe interface 22, continuously extracting air from the cavity to create a stable negative pressure environment in the working area of ​​the lifting plate 21, forming the core connection basis for negative pressure formation. The lifting plate 21 has a sealing gasket 24 at its edge. The vacuum assembly 2 also includes a first telescopic drive component 23 vertically installed in the main body 1. The output end of the first telescopic drive component 23 passes through the table surface of the main body 1 and connects to the bottom of the lifting plate 21.

[0028] In use, the first telescopic drive component 23 moves the lifting plate 21 upward, thereby moving the base plate upward until the lifting plate 21 engages with the support frame 31. The external air extraction device continuously extracts air from the cavity to form a negative pressure, allowing the plastic film body 32 to be simultaneously adsorbed downward from multiple points, achieving uniform adhesion between the plastic film and the outer surface of the base plate, effectively avoiding problems such as local wrinkling, curling, and loose adhesion of the plastic film.

[0029] An oven 5 for heating the plastic film body 32 is fixed to the top of the support column.

[0030] Oven 5 (existing technology) heats and bakes the pre-bonded plastic film body 32 and the shoe midsole blank, allowing the adhesive on the bottom of the plastic film body 32 to cure quickly through heat transfer, thus achieving a firm bond between the plastic film body 32 and the shoe midsole blank. Oven 5 uses a device that can blow hot air outwards, directing the hot air onto the plastic film body 32.

[0031] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A vacuum wrapping device for shoe midsole preform film, comprising wrapping a plastic film onto the preform, characterized in that: The device includes a main body (1), on which a vacuum assembly (2) for placing a substrate is provided. A plastic film fixing assembly (3) is provided directly above the vacuum assembly (2). An adhesive applicator (4) is provided between the vacuum assembly (2) and the plastic film fixing assembly (3). A plastic film body (32) is provided in the plastic film fixing assembly (3). The adhesive applicator (4) includes an adhesive applicator plate (41) capable of applying adhesive to the bottom of the plastic film body (32), and the adhesive applicator plate (41) is capable of reciprocating along the width direction of the plastic film body (32).

2. The vacuum wrapping device for shoe midsole preforms according to claim 1, characterized in that: The adhesive applicator (4) includes a support shell (42), and a third telescopic drive member (43) is vertically arranged in the support shell (42). The output end of the third telescopic drive member (43) is connected to the bottom of the adhesive applicator (41).

3. The vacuum wrapping device for shoe midsole preform film according to claim 2, characterized in that: The adhesive applicator (4) further includes a rotary drive (44) that can reciprocate along the length of the support shell (42), and the output end of the rotary drive (44) is connected to the support shell (42).

4. The vacuum wrapping device for shoe midsole preform film according to claim 3, characterized in that: The glue applicator (4) also includes a support frame (46) fixed on the main body (1). The support frame (46) is equipped with a fourth telescopic drive member (45) for driving the glue applicator plate (41) to move back and forth along its length. The output end of the fourth telescopic drive member (45) is connected to the rotary drive member (44). The support frame (46) is also provided with a glue box (47) for storing glue.

5. The vacuum wrapping device for shoe midsole preform film according to claim 1, characterized in that: The vacuum assembly (2) includes a lifting plate (21) that can move up and down, and the interior of the lifting plate (21) is a cavity. The lifting plate (21) is also uniformly provided with a number of air holes (211) that communicate with the cavity. The lifting plate (21) has a pipe interface (22) connected to the cavity on the outside. The edge of the lifting plate (21) has a sealing gasket (24).

6. The vacuum wrapping device for shoe midsole preform film according to claim 5, characterized in that: The vacuum assembly (2) also includes a first telescopic drive (23) vertically disposed in the main body (1), the output end of the first telescopic drive (23) passing through the table surface of the main body (1) and connected to the bottom of the lifting plate (21).

7. The vacuum wrapping device for shoe midsole preform film according to claim 1, characterized in that: The main body (1) is also provided with support columns at the four corners of the top. The plastic film fixing assembly (3) also includes a support frame (31) fixed on the support column. The plastic film fixing assembly (3) also includes a pressure frame (33) set directly above the support frame (31). The plastic film body (32) is placed between the support frame (31) and the pressure frame (33). The plastic film fixing assembly (3) also includes a second telescopic drive member (34) set vertically for driving the pressure frame (33) to move up and down.

8. The vacuum wrapping device for shoe midsole preform film according to claim 7, characterized in that: An oven (5) for heating the plastic film body (32) is fixed to the top of the support column.

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