A curved surface protective film hot press forming device

Abstract

The utility model provides a curved surface protection film hot press forming device relates to hot press forming equipment field, include: workstation, the workstation upper end surface is installed with two slide rails left and right symmetry, and two slide rails top slidingly connected with lower mould, the workstation is provided with displacement mechanism. Through the setting of displacement mechanism, can when processing curved surface protection film, can first through displacement mechanism with lower mould and move forward, the staff again put protection film into lower mould, in this process, because the staff's hand will not be in the narrow area below the lower pressing plate, even if the lower pressing plate suddenly down, also can avoid to the staff hand to cause the bruise of pressing, improved the security of this hot press forming device when using, solved the lower mould of current hot press forming device because fixed on the workstation upper portion and located the lower pressing plate directly below, lead to the staff to place protection film to need to stretch the hand into the narrow space between both, has the hidden danger of being pressed by the lower pressing plate problem.

Description

Technical Field

[0001] This utility model relates to the field of hot pressing equipment technology, and in particular to a hot pressing device for curved protective film. Background Technology

[0002] In the current electronics market, curved screen smartphones are becoming increasingly common. This trend has led to a surge in demand for curved screen protectors. Curved screen protectors provide essential protection for curved screens, such as preventing scratches and impacts. Scratch-resistant and impact-resistant screen protectors are typically composed of multiple layers of heterogeneous materials. Currently, the production process of curved screen protectors requires a thermoforming device. A thermoforming device is an industrial piece of equipment that uses the combined action of heating and pressurization to plastically deform materials and shape them into a specific form.

[0003] Currently, the lower mold of the thermoforming device is usually fixedly installed on the upper part of the worktable and directly below the lower pressure plate. When the operator places the protective film, they need to hold the protective film and reach into the space between the lower pressure plate and the worktable before placing it into the lower mold. During this operation, the hands are frequently in the narrow area below the lower pressure plate, posing a safety hazard of being crushed by the suddenly descending lower pressure plate. At the same time, the lower mold is easily obscured by the lower pressure plate, making it difficult for the operator to visually judge its exact position, which can easily lead to misalignment when placing the protective film and affect the thermoforming quality of the product. Utility Model Content

[0004] This utility model relates to a hot pressing forming device for curved protective film, which solves the problems of the current hot pressing forming device where the lower mold is fixed on the upper part of the worktable and located directly below the lower pressure plate, causing workers to have to put their hands into the narrow space between the two when placing the protective film, which poses a safety hazard of being crushed by the lower pressure plate. In addition, the lower mold is easily blocked and difficult to be accurately aligned, which affects the hot pressing forming quality of the product.

[0005] In a first aspect, this utility model provides a hot-pressing forming device for curved protective films, specifically comprising: a worktable, wherein a U-shaped support plate is fixedly connected to the rear side of the top of the worktable, and a hot-pressing mechanism is provided on the top of the U-shaped support plate; two slide rails are symmetrically installed on the upper surface of the worktable, and a lower mold is slidably connected to the top of the two slide rails; a displacement mechanism is provided on the worktable; the hot-pressing mechanism includes an electric cylinder, which is installed on the top of the U-shaped support plate, and the telescopic rod of the electric cylinder passes through the top of the U-shaped support plate, a lower pressure plate is fixedly connected to the lower end of the telescopic rod of the electric cylinder, a heating plate is installed at the bottom of the lower pressure plate, and an upper mold is installed at the bottom of the heating plate; the displacement mechanism includes a drive motor, which is installed on the rear end face of the worktable, and a drive screw is fixedly connected to the shaft of the drive motor, the front end of the drive screw is rotatably connected to the front side of the upper end face of the worktable, and a drive nut is threadedly connected to the outside of the drive screw, and the drive nut is installed at the bottom of the lower mold.

[0006] Furthermore, a controller is installed on the front right side of the upper surface of the workbench, which is used to control the operation of the hot pressing mechanism and the displacement mechanism.

[0007] Furthermore, four vertical guide rods are fixedly connected between the top surface of the U-shaped support plate and the top surface of the worktable, and a bushing is fixedly embedded at each of the four corners of the lower pressure plate, and the four bushings are slidably connected to the four vertical guide rods respectively.

[0008] Furthermore, each slide rail has a T-shaped groove on its upper end face, and the bottom end face of the lower mold has two T-shaped sliders arranged symmetrically on the left and right sides. The two T-shaped sliders are slidably connected to the T-shaped grooves on the two slide rails respectively, and limit blocks are fixedly connected to both ends of each slide rail.

[0009] Furthermore, four automatic limiting rods are fixedly connected to the bottom end face of the lower pressure plate, and two positioning cylinders are fixedly connected to the left and right sides of the lower mold; when the hot pressing mechanism is in the pressing state, the four automatic limiting rods are respectively inserted into the four positioning cylinders.

[0010] This utility model provides a hot pressing forming device for curved protective film, which has the following beneficial effects: This invention, through the design of a displacement mechanism, allows the lower mold to be moved forward during the processing of curved protective films. Once the lower mold is positioned at the front of the upper part of the worktable, the operator can then place the protective film into it. During this operation, the operator's hands are not in the confined space under the lower pressure plate, preventing injury even if the lower pressure plate suddenly moves downwards. This significantly improves the safety of the thermoforming device. Furthermore, the lower mold is not obstructed by the lower pressure plate, allowing the operator to clearly and intuitively determine its position, effectively improving the accuracy of the protective film placement and ensuring the thermoforming quality of the product.

[0011] This invention, through the coordinated arrangement of automatic limiting rods and positioning cylinders, ensures that during the process of the lower pressure plate driving the upper mold to press down, the four automatic limiting rods will first precisely engage with the four positioning cylinders, thereby forming a stable positioning effect on the lower mold and preventing displacement of the lower mold during hot pressing. This ensures that the protective film is always in a precise preset position during hot pressing, thus improving the reliability of hot pressing of curved protective films. Attached Figure Description

[0012] To more clearly illustrate the technical solution of this utility model, the accompanying drawings will be briefly described below.

[0013] In the attached diagram: Figure 1A three-dimensional structural schematic diagram of this application is shown; Figure 2 A structural schematic diagram of this application from a rear view is shown; Figure 3 A front view structural schematic diagram of this application is shown; Figure 4 A schematic diagram of the hot pressing mechanism and the upper mold of this application is shown; Figure 5 The diagram shows the disassembled structure of the slide rail, lower mold, and displacement mechanism of this application.

[0014] List of reference numerals 1. Workbench; 101. U-shaped support plate; 102. Vertical guide rod; 103. Slide rail; 104. Limit block; 2. Hot pressing mechanism; 201. Electric cylinder; 202. Lower pressure plate; 203. Heating plate; 204. Automatic limit rod; 3. Upper mold; 4. Lower mold; 401. Positioning insert; 5. Displacement mechanism; 501. Drive motor; 502. Drive screw; 503. Drive nut; 6. Controller. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0016] Example 1: Please refer to Figures 1 to 5 : This utility model proposes a hot-pressing forming device for curved protective film, comprising: a workbench 1, a U-shaped support plate 101 fixedly connected to the rear top of the workbench 1, and a hot-pressing mechanism 2 provided on the top of the U-shaped support plate 101; two slide rails 103 symmetrically installed on the upper surface of the workbench 1, and a lower mold 4 slidably connected to the top of the two slide rails 103; a displacement mechanism 5 provided on the workbench 1; the hot-pressing mechanism 2 includes an electric cylinder 201, which is installed on the top of the U-shaped support plate 101, and the telescopic rod of the electric cylinder 201 passes through the top of the U-shaped support plate 101. A lower pressure plate 202 is fixedly connected to the lower end of the telescopic rod of the electric cylinder 201, and a heating plate 203 is installed at the bottom of the lower pressure plate 202. An upper mold 3 is installed at the bottom of the heating plate 203, and an electric heating tube is provided inside the heating plate 203 (this is an existing mature technology). (Technical details omitted); the displacement mechanism 5 includes a drive motor 501, which is mounted on the rear end face of the worktable 1. A drive screw 502 is fixedly connected to the shaft of the drive motor 501. The front end of the drive screw 502 is rotatably connected to the front side of the upper end face of the worktable 1. A drive nut 503 is threadedly connected to the outside of the drive screw 502, and the drive nut 503 is installed at the bottom of the lower mold 4. With the setting of the displacement mechanism 5, when processing the curved protective film, the lower mold 4 can be moved forward by the displacement mechanism 5 first, and then the operator puts the protective film into the lower mold 4. During this operation, since the operator's hands are not in the narrow area below the lower pressure plate 202, even if the lower pressure plate 202 suddenly moves downward, it can avoid crushing the operator's hands, thereby improving the safety of using this hot pressing molding device.

[0017] A controller 6 is installed on the front right side of the upper end face of the worktable 1. The controller 6 is used to control the operation of the hot pressing mechanism 2 and the displacement mechanism 5, thereby improving the automation level of this molding device.

[0018] Four vertical guide rods 102 are fixedly connected between the inner top surface of the U-shaped support plate 101 and the upper surface of the workbench 1. A bushing is fixedly embedded at each of the four corners of the lower pressure plate 202, and the four bushings are slidably connected to the four vertical guide rods 102 respectively, so that the lower pressure plate 202 can obtain reliable guidance when it moves up and down.

[0019] Each slide rail 103 has a T-shaped groove on its upper end face. The bottom end face of the lower mold 4 is symmetrically provided with two T-shaped sliders, and the two T-shaped sliders are slidably connected to the T-shaped grooves on the two slide rails 103 respectively. Each slide rail 103 has a limit block 104 fixedly connected to both ends to limit the movement of the lower mold 4.

[0020] Example 2, based on Example 1, such as Figures 1 to 3As shown, four automatic limiting rods 204 are fixedly connected to the bottom end of the lower pressure plate 202, and two positioning cylinders 401 are fixedly connected to the left and right sides of the lower mold 4. When the hot pressing mechanism 2 is in the pressing state, the four automatic limiting rods 204 are respectively inserted into the four positioning cylinders 401. Through the cooperation between the automatic limiting rods 204 and the positioning cylinders 401, during the process of the lower pressure plate 202 driving the upper mold 3 to press down, the four automatic limiting rods 204 will first accurately insert into the four positioning cylinders 401, thereby forming a stable positioning effect on the lower mold 4, preventing the lower mold 4 from shifting during the hot pressing process, ensuring that the protective film is always in a precise preset position during hot pressing, and improving the reliability of hot pressing of curved protective film.

[0021] The working principle of this embodiment is as follows: When processing the curved protective film, the controller 6 first controls the operation of the heating plate 203, so that current enters the electric heating tube inside the heating plate 203, and the heating plate 203 heats the upper mold 3; then the controller 6 controls the drive motor 501 to rotate forward, which drives the drive screw 502 to rotate forward. At this time, the drive nut 503 moves the lower mold 4 forward under the action of the thread. After the lower mold 4 moves forward to the front side of the upper part of the worktable 1, the operator puts the protective film into the lower mold 4. During this operation, since the operator's hands are not in the narrow area below the lower pressure plate 202, even if the lower pressure plate 202 suddenly moves down, there will be no safety hazard of crushing the operator's hands, thus greatly improving the safety of this hot pressing molding device. After the protective film is placed into the lower mold 4, the controller 6 controls the drive motor 501 to reverse, which in turn drives the drive screw 502 to reverse as well. At this time, the drive nut 503 moves the lower mold 4 backward under the action of the thread, so that the lower mold 4 moves backward to directly below the lower pressure plate 202 and the upper mold 3. Then, the controller 6 controls the extension rod of the electric cylinder 201 to extend, which moves the lower pressure plate 202, the heating plate 203, the four automatic limit rods 204 and the upper mold 3 downward. Then, the four automatic limit rods 204 first engage with the four positioning cylinders 401. When the four automatic limit rods 204 are inserted into the four positioning cylinders 401, the lower mold 4 can be effectively positioned to prevent displacement, thus making the protective film more reliable in hot pressing. Then the upper mold 3 continues to move down and presses down the protective film placed in the lower mold 4. Since the upper mold 3 has been heated by the heating plate 203 at this time, the protective film can be plastically deformed and shaped into a curved protective film through the synergistic effect of heating and pressurization, thus completing the processing of the curved protective film.

[0022] The following points should be noted in this article: 1. The accompanying drawings of this utility model only relate to the structures involved in this utility model; other structures can be referred to conventional designs.

[0023] 2. Where there is no conflict, the embodiments of this utility model and the features in the embodiments can be combined with each other to obtain new embodiments.

[0024] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A hot pressing forming apparatus for curved protective film, comprising: A workbench (1) is provided with a U-shaped support plate (101) fixedly connected to the rear side of the top of the workbench (1), and a hot pressing mechanism (2) is provided on the top of the U-shaped support plate (101); characterized in that two slide rails (103) are installed symmetrically on the upper surface of the workbench (1), and a lower mold (4) is slidably connected to the top of the two slide rails (103); a displacement mechanism (5) is provided on the workbench (1); the hot pressing mechanism (2) includes an electric cylinder (201), the electric cylinder (201) is installed on the top of the U-shaped support plate (101), and the telescopic rod of the electric cylinder (201) passes through the top of the U-shaped support plate (1 ... The lower end of the telescopic rod of the cylinder (201) is fixedly connected to a lower pressure plate (202), and a heating plate (203) is installed at the bottom of the lower pressure plate (202). An upper mold (3) is installed at the bottom of the heating plate (203). The displacement mechanism (5) includes a drive motor (501), which is installed on the rear end face of the worktable (1). A drive screw (502) is fixedly connected to the shaft of the drive motor (501). The front end of the drive screw (502) is rotatably connected to the front side of the upper end face of the worktable (1). A drive nut (503) is threadedly connected to the outside of the drive screw (502), and the drive nut (503) is installed at the bottom of the lower mold (4).

2. The curved protective film hot pressing forming device according to claim 1, characterized in that: A controller (6) is installed on the front right side of the upper end face of the workbench (1). The controller (6) is used to control the operation of the hot pressing mechanism (2) and the displacement mechanism (5).

3. The curved protective film hot pressing forming device according to claim 1, characterized in that: Four vertical guide rods (102) are fixedly connected between the top surface of the U-shaped support plate (101) and the upper surface of the workbench (1). A bushing is fixedly embedded at each of the four corners of the lower pressure plate (202), and the four bushings are slidably connected to the four vertical guide rods (102) respectively.

4. The curved protective film hot pressing forming device according to claim 1, characterized in that: Each slide rail (103) has a T-shaped groove on its upper end face. The bottom end face of the lower mold (4) is symmetrically provided with two T-shaped sliders, and the two T-shaped sliders are slidably connected to the T-shaped grooves on the two slide rails (103). Each slide rail (103) has a limit block (104) fixedly connected to both ends.

5. The curved protective film hot pressing forming device according to claim 1, characterized in that: The bottom end face of the lower pressure plate (202) is fixedly connected with four automatic limit rods (204), and the left and right sides of the lower mold (4) are fixedly connected with two positioning cylinders (401); when the hot pressing mechanism (2) is in the pressing state, the four automatic limit rods (204) are respectively inserted into the four positioning cylinders (401).

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