TW201943610A - Thermoplastic film method of three-dimensional surface device - Google Patents

Abstract

The present invention introduces a method of applying thermoplastic film on a three-dimensional surface device. The method analyzes the shape and property of the device before cutting, and utilizing the full potential of the thermoplastic film material to laminate on devices with large curved surfaces. The method can also apply to irregular three-dimensional surfaces.

Description

Device with three-dimensional curved surface for thermoplastic filming method

The technology of the present invention relates to the field of touch control, in particular to a technology for performing thermoplastic film coating on a device having a three-dimensional structure with a large curvature.

The touch module bonding technology has gradually evolved from the initial flat film to the one-dimensional curved surface and the two-dimensional curved surface. Finally, for larger curved surfaces, the outer surface decoration (OMD) technology can be used for filming.

Touch module bonding is generally done as a two-dimensional or three-dimensional film at room temperature. Under special conditions, a thermosetting optical adhesive (OCA) is required as a hot-pressed film. As the two-dimensional or three-dimensional devices with larger curvatures on the market currently need to be used as touch modules, optical film materials or other materials for bonding applications, a thermoplastic molding method is needed to fix the films.

The invention provides a method for thermoplastic film lamination with a three-dimensional curved surface, including the following steps: a. Providing a film, a thermoplastic laminating machine, a mold, and a device, the mold having a groove for receiving the device The device has a three-dimensional curved surface. The thermoplastic laminating machine has a working space for thermoplastic laminating the film. The device includes a heating device and a clamp. The heating device is used to heat the film. To soften it, the clamp is used to fix the film, and a pressing action can be performed to make the film and the device adhere. b. Use the clamp to secure the film. c. Use the heating device to heat the film. d. Set the mold in the working space with the groove facing the film. e. Place the device in the groove with the three-dimensional curved surface facing the film. f. The clamp performs the pressing operation to make the film adhere to the three-dimensional curved surface.

The invention provides a device thermoplastic film laminating method with a three-dimensional curved surface, which performs technical research on the external design of the device before cutting, including material characteristics, stress distribution, thickness variation, and final product specification quality. Extremely large curved surface device film, and can be applied to irregular three-dimensional curved surface.

The technical means and structure used in the present invention are described in detail below with reference to the embodiments of the present invention. The features and functions are as follows. It is fully understood, but it should be noted that the content does not limit the present invention.

Please refer to FIG. 1, FIG. 2, FIG. 3, FIG. 4A, FIG. 4B, FIG. 4C and FIG. 4D at the same time, which is a method flowchart, mold and Schematic diagrams I and II of the device, and schematic diagrams 1-4 of the process. The method for thermoplastic film with three-dimensional curved surface of the present invention includes the following steps:

Step 100: Provide a film 1, a thermoplastic laminating machine 2, a mold 3, and a device 4. The mold 3 has a groove 31 for receiving the device 4, and the device 4 has a three-dimensional curved surface 41. The thermoplastic laminating machine 2 is used for thermoplastic laminating the film 1 and the device 4. In one embodiment, the film 1 may be a polymer film, a metal oxide film, or a nanosol film.

Please refer to FIGS. 4A to 4C. The thermoplastic laminating machine 2 has a working space 21 therein, and the thermoplastic laminating process can be performed in the working space 21. The thermoplastic laminating machine 2 includes a heating device 22 and a clamp 23. The heating device 22 can heat the film 1 to an appropriate temperature to soften the film 1 to facilitate subsequent filming operations. The clamp 23 is used for fixing the film 1 and can perform a pressing action 91 to make the film 1 and the device 4 adhere to each other. In this embodiment, the three-dimensional curved surface 41 is a concave surface, but is not limited thereto, and it may also be a convex surface or an irregular curved surface.

Step 110: The thermoplastic laminating machine 2 uses the clamp 23 to fix the film 1.

Step 120: The thermoplastic laminating machine 2 uses the heating device 22 to heat the film 1 to an appropriate temperature. The proper temperature can soften the surface of the film 1, but will not affect the structural properties of the film 1 itself.

Step 130: The mold 3 is set in the working space 21, and the groove 31 faces the film 1. Please refer to FIG. 4A. The clamp 23 can fix the film 1 and use the heating device 22 to heat the film 1 to an appropriate temperature, and the mold 3 is set directly below the film 1 and makes the groove 31 faces the film 1, and the groove 31 can assist the thermoplastic laminating machine 2 in thermoplastic laminating the film 1.

Step 140: The device 4 is placed in the groove 31, and the three-dimensional curved surface 41 faces the film 1.

Step 141: The thermoplastic bonding machine 2 fixes the mold 3. Referring to FIG. 4B, the position of the mold 3 is fixed to ensure the stability when the pressing operation 91 is performed.

Step 150: the clamp 23 performs the pressing operation 91 to make the film 1 and the three-dimensional curved surface 41 adhere together. Please refer to FIG. 4C, the film 1 is adhered to the three-dimensional curved surface 41 by high pressure lamination (for example, Compressed dry air, CDA).

In an embodiment of the present invention, the step 150 further includes: wherein the three-dimensional curved surface 41 defines a center region 411, a curved surface region 412, and an edge region 413 from the center to the edge of the three-dimensional curved surface 41. The pressing action 91 Lamination of the film 1 and the three-dimensional curved surface 41 is performed sequentially from the central region 411, the curved surface region 412 to the edge region 413.

Please refer to FIGS. 2 and 3 at the same time. The edge of the device 4 has a height H and a width D from the edge of the groove 31. In order to avoid the risk of air bubbles between the three-dimensional curved surface 41 and the film 1 in the thermoplastic film, The plastic angle can be greater than 1.6 of the device design angle. Therefore, by controlling the height H and the width D, the device design angle can meet the requirements of the ideal thermoplastic angle. In this embodiment, a center point A is defined in the center of the center area 411, an edge point B is defined in the edge area 413, a branch point C is defined in the edge of the groove 31, and the connection between the center point A and the edge point B is There is a first included angle α between the line direction and the horizontal direction, and a second included angle β between the line connecting the center point A and the fulcrum C and the horizontal direction. Then, the second included angle β is greater than 1.6 of the first included angle α. Times. The horizontal distance from the center point A to the edge point B of the three-dimensional curved surface 41 is 25.4 millimeters (mm). It can be seen from FIG. 3 that the vertical distance from the center point A to the edge point B is 4.3 mm, the horizontal distance from the center point A to the fulcrum 31 of the groove 31 is 28.4 mm, and the vertical distance from the center point A to the fulcrum 31 of the groove 31 is vertical. The distance is 7.8 mm. Therefore, the first angle α between the central point A and the edge point B of the three-dimensional curved surface 41 and the horizontal direction can be calculated as 9.6 degrees (device design angle), and the center point A of the three-dimensional curved surface 41 to the fulcrum 31 of the groove 31 The second included angle β between C and the horizontal direction is 15.4 degrees (thermoplastic angle), making the second included angle β greater than 1.6 times the first included angle α, which meets the requirements of ideal thermoplastic angles.

The probability of bubbles in the three-dimensional curved film can be predicted from the pressing sequence, and the pressing sequence can be effectively controlled by designing the size of the groove 31. In one embodiment, the film sequence is extended from the central area 411 to the curved area 412 and the edge area 413. By controlling the width and height of the groove 31 in the present invention, it is possible to avoid problems such as optical abnormality caused by excessive stretching of the film 1 during the bonding process.

Step 160: Perform a laser cutting operation 92, so that the film 1 is aligned with the edge of the three-dimensional curved surface 41. Please refer to FIG. 4D. After the pressing operation 91 is completed, the film 1 can be aligned with the edge of the three-dimensional curved surface 41 by using a laser cutting technique.

Through the above detailed description, it can fully show that the purpose and efficacy of the present invention are progressive in implementation, have great industrial utility value, and are new inventions that have never been seen on the market today, and fully meet the requirements of invention patents , Apply according to law. The above description is only an embodiment of the present invention, and therefore does not limit the implementation and protection scope of the present invention. For those skilled in the art, it should be able to realize that equivalent substitutions and Obvious changes should be included in the protection scope of the present invention.

1‧‧‧ film

2‧‧‧ Thermoplastic laminating machine

21‧‧‧Work Space

22‧‧‧Heating device

23‧‧‧Fixture

3‧‧‧mould

31‧‧‧Groove

4‧‧‧ device

41‧‧‧3D surface

411‧‧‧ central area

412‧‧‧ surface area

413‧‧‧Marginal area

91‧‧‧Press action

92‧‧‧Laser cutting action

100 ～ 160‧‧‧step

A‧‧‧center

B‧‧‧ edge point

C‧‧‧ Fulcrum

H‧‧‧ height

D‧‧‧Width

FIG. 1 is a method flow chart of a preferred embodiment of a method for applying a thermoplastic film with a three-dimensional curved surface according to the present invention. FIG. 2 is a first schematic cross-sectional view of a mold and a device of a preferred embodiment of a method for applying a thermoplastic film with a three-dimensional curved surface according to the present invention. FIG. 3 is a schematic diagram 2 of a mold and a device cross-section of a preferred embodiment of a method for applying a thermoplastic film with a three-dimensional curved surface according to the present invention. FIG. 4A is a first schematic view of a manufacturing process of a method for applying a thermoplastic film with a three-dimensional curved surface to a device according to the present invention. FIG. 4B is a second schematic diagram of the manufacturing process of the preferred embodiment of a method for applying a thermoplastic film with a three-dimensional curved surface according to the present invention. FIG. 4C is a schematic diagram of a third embodiment of a method for thermoplastic film lamination with a three-dimensional curved surface according to the present invention. FIG. 4D is a schematic diagram 4 of a manufacturing process of a preferred embodiment of a method for applying a thermoplastic film with a three-dimensional curved surface according to the present invention.

Claims (8)

A method for applying a thermoplastic film to a device with a three-dimensional curved surface includes the following steps: a. Providing a film, a thermoplastic laminating machine, a mold, and a device, the mold having a groove for receiving the device, the device It has a three-dimensional curved surface. The thermoplastic laminating machine has a working space for the thermoplastic lamination of the film. The heating laminating device includes a heating device and a clamp. The heating device is used to heat the film to soften it. The fixture is used to fix the film, and a pressing action can be performed to make the film adhere to the device; b. Using the fixture to fix the film; c. Using the heating device to heat the film; d. Setting the mold In the working space, with the groove facing the film; e. Placing the device in the groove with the three-dimensional curved surface facing the film; f. The clamp performing the pressing action so that the film and the three-dimensional surface Surface fit. According to the method of applying a thermoplastic film with a three-dimensional curved surface according to item 1 of the scope of the patent application, the step f. Further includes: wherein the three-dimensional curved surface defines a central region, a curved surface region, and In the edge region, the laminating action sequentially bonds the film and the three-dimensional curved surface from the central region, the curved surface region to the edge region. As described in item 2 of the scope of the patent application, a method for applying a thermoplastic film with a three-dimensional curved surface, wherein the center of the center region defines a center point, the edge region defines an edge point, the edge of the groove defines a point, and the center There is a first included angle between the connecting direction of the point and the edge point and the horizontal direction, and a second included angle between the connecting direction of the center point and the fulcrum and the horizontal direction, and the second included angle is greater than 1.6 of the first included angle. Times. The method for applying a thermoplastic film with a three-dimensional curved surface device as described in item 1 of the patent application scope, wherein step f. Further includes the following steps: g. Performing a laser cutting operation to cut the film from the edge of the three-dimensional curved surface. Qi. The method for applying a thermoplastic film with a three-dimensional curved surface to a device having a three-dimensional curved surface according to item 1 of the scope of the patent application, wherein the step e. Further includes the following steps: e1. The thermoplastic bonding machine fixes the mold. The device for applying a thermoplastic film with a three-dimensional curved surface according to item 1 of the scope of patent application, wherein the three-dimensional curved surface is a concave surface. The device for applying a thermoplastic film with a three-dimensional curved surface according to item 1 of the scope of patent application, wherein the three-dimensional curved surface is a convex surface. The device for applying a thermoplastic film with a three-dimensional curved surface according to item 1 of the scope of the patent application, wherein the three-dimensional curved surface is an irregular curved surface.