TW202345255A - Manufacturing method of protective film device capable of changing the area of the binding surface according to the vertical distance between the axis of the roller and the to-be-formed surface - Google Patents

Abstract

A method for manufacturing a protective film device includes a preparatory step and a processing step. The preparatory step is to prepare a roller having at least one groove with a gradually outward expanding opening. The processing step is to prepare a material to be formed with a to-be-formed surface, and adjust and set a vertical distance between an axis of the roller and the to-be-formed surface, so that the roller rolls and imprints on the to-be-formed surface. The at least one groove is sunk into the to-be-formed surface, so that the material to be formed is formed into a moldable material having an imprinted structure with a bottom part and at least one rib gradually narrowing outward. The imprinted structure has a binding surface formed on the side of the at least one rib away from the bottom part. The area of the binding surface can be changed according to the vertical distance between the axis of the roller and the to-be-formed surface.

Description

Manufacturing method of protective film device

The present invention relates to a method for manufacturing a protective film device, in particular to a method of manufacturing a protective film device using roller embossing.

Referring to Figure 1, a known method for manufacturing a protective film device includes: preparing a roller 8 and a material to be formed 91. The roller 8 has a protruding structure 81 and a recessed structure 82 radially inwardly concave relative to the protruding structure 81 . Then, the material 91 to be formed is heated to a molten state, and the material 91 to be formed is coated on a base layer 92 so that the material 91 to be formed has a surface 911 to be formed, and then the roller 8 is driven around it The axis is rotated and the material 91 to be formed is transported in a direction L1 so that the protruding structure 81 and the recessed structure 82 sink into the surface 911 to be formed, so that the material 91 to be formed is formed into a plastic material 93 . The plastic material 93 has a bottom 931 and an embossed structure 932 protruding relative to the bottom 931 . The embossed structure 932 has a plurality of intersecting ribs 933 in a mesh shape, and a fitting surface 934 formed on the top surface of the ribs 933 . Finally, the plastic material 93 is solidified to complete the manufacturing process of the protective film device.

In the manufacturing method of the protective film device, the recessed structure 82 of the roller 8 is completely sunk into the surface to be formed 911. Therefore, the area of the fitting surface 934 of the plastic material 93 is fixed when the roller 8 is selected. . Therefore, when the area size of the fitting surface 934 needs to be changed, the roller 8 must be disassembled and replaced with another roller 8 of different specifications. In addition to causing inconvenience on the production line, a large number of rollers 8 of different specifications must be prepared. , resulting in high equipment cost and large storage space. Therefore, the known manufacturing method of the protective film device still needs to be improved.

Therefore, it is an object of the present invention to provide a method for manufacturing a protective film device that can overcome at least one disadvantage of the prior art.

Therefore, the manufacturing method of the protective film device of the present invention includes a preparatory step and a processing step.

The preliminary step is to prepare a roller. The roller has a protruding structure and a recessed structure that is radially inwardly concave relative to the protruding structure. The recessed structure has at least one groove with an opening gradually expanding outward.

The processing step is to prepare a material to be formed with a surface to be formed, adjust and set the vertical distance between an axis of the roller and the surface to be formed, so that the roller rotates around the axis and rolls and presses against the surface to be formed. After printing, the protruding structure and the concave structure sink into the surface to be formed, so that the material to be formed is formed into a plastic material. The plastic material has a bottom and an embossed structure protruding relative to the bottom. The embossed structure has at least one rib that tapers outward, and a fitting surface formed on a side of the at least one rib away from the bottom. The distance between the fitting surface and the bottom will change according to the adjusted vertical distance between the axis of the roller and the surface to be formed, and at the same time change the area of the fitting surface.

The effect of the present invention is that it only needs to prepare one roller, and by adjusting and setting the vertical distance between the axis of the roller and the surface to be formed, the laminating surfaces of different sizes can be produced. Therefore, the protective film device The manufacturing method does not require additionally preparing rollers of different specifications and preparing a large storage space, thereby effectively reducing production costs.

Referring to Figures 2 to 4, an embodiment of the manufacturing method of the protective film device of the present invention includes a pre-step, a heating step, a coating step, a processing step, and a curing step.

The preliminary step is to prepare a roller 1. The roller 1 is a cylinder extending lengthwise along an axis 10 and has a protruding structure 11 located on its outer peripheral surface and a recessed structure 12 radially inwardly concave relative to the protruding structure 11 . The protrusion structure 11 has several protrusions 111 arranged at intervals. The recessed structure 12 is located between the protrusions 111 and has a plurality of intersecting grooves 121 in a mesh shape with openings gradually expanding outward. Each groove 121 is fan-shaped in cross-section along its transverse extension, and has two inclined surfaces 122 extending obliquely from the opening of the groove 121 toward the axis 10 and gradually approaching and overlapping each other. In other implementation aspects of this embodiment, the grooves 121 can be of other shapes, the recessed structure 12 can have only one groove 121 , and the groove 121 does not necessarily have two inclined surfaces 122 , the cross section of each groove 121 along its transverse extension may also be a frustoconical shape, and each groove 121 only needs to have a geometric shape with an opening gradually expanding outward.

In this embodiment, a cooling system (not shown) is installed in the roller 1. The cooling system keeps the roller 1 at a constant temperature during operation. During implementation, the cooling system uses circulating cooling water to keep the roller 1 at a constant temperature. Roller 1 is maintained at this constant temperature.

The heating step is to use a heating device (not shown) to heat a material 2 to be formed, so that the material 2 to be formed is heated to a molten state. During implementation, the material 2 to be molded is polyolefin (PO), ethylene-vinyl acetate copolymer (EVA), or combinations thereof. The polyolefin can be selected from polyethylene (PE) or polypropylene (PP). The heating device heats the material 2 to be formed to 180~270°C, so that the material 2 to be formed is in a molten state.

The coating step is to evenly coat the material 2 to be formed on a base layer 3 and to make the material 2 have a surface 21 to be formed. During implementation, the base layer 3 is a paper product.

The processing step is to adjust and set the vertical distance H between the axis 10 of the roller 1 and the surface to be formed 21 (as shown in FIG. 4 ), and move the material 2 to be formed along a conveying direction L2 through a conveying device 4 , the roller 1 is rotated around the axis 10 in a rotation direction L3, and rolls and presses relatively on the surface 21 to be formed, the protruding structure 11 and the recessed structure 12 will sink into the surface 21 to be formed, so that the surface 21 is to be formed. The material 2 to be formed is formed into a plastic material 5 . The plastic material 5 has a bottom 51 and an embossing structure 52 protruding upward relative to the bottom 51 . The bottom 51 is formed by the protruding structure 11 sinking into the surface 21 to be formed, and the imprinting structure 52 is formed by the concave structure 12 sinking into the surface 21 to be formed. The embossed structure 52 has a plurality of ribs 521 that are gradually narrowed upward from the top surface of the bottom 51 , and a fitting surface 522 formed on a side of the ribs 521 away from the bottom 51 .

The distance between the fitting surface 522 and the bottom 51 will change according to the adjusted vertical distance H between the axis 10 of the roller 1 and the surface 21 to be formed. Referring to Figures 4 and 5, in this embodiment, the fitting surface 522 has a plurality of first top surfaces 523 respectively formed on the side of the ribs 521 away from the bottom 51, which can be adjusted by setting. The axis 10 moves downward relative to the surface 21 to be formed, thereby shortening the vertical distance H between the axis 10 and the surface 21 to be formed, and the protruding structure 11 and the recessed structure 12 of the roller 1 sink into the surface 21 to be formed. When, a different plastic material 5 will be produced. The ribs 521 of the plastic material 5 each have a second top surface 524. The area of the second top surface 524 is smaller than the area of the first top surface 523, and also changes the area of the fitting surface 522.

Therefore, when one roller 1 is installed, the vertical distance H between the axis 10 and the surface to be formed 21 can be adjusted to produce a plurality of plastic materials 5 of different specifications. The plastic materials 5 The fitting surfaces 522 respectively have different area sizes. In other implementation aspects of this embodiment, the conveying device 4 can also be moved up and down to adjust the vertical distance H between the axis 10 of the roller 1 and the surface to be formed 21 to produce products with different area sizes. The method of adjusting the vertical distance H of the plastic material 5 of the fitting surface 522 is not limited to this embodiment.

In the implementation of this embodiment, the solidification step is performed simultaneously with the processing step, and the roller 1 is continuously cooled by the cooling system installed in the roller 1. During the processing step, the roller 1 rolls and embosses the roller 1. When the material 2 is to be formed, the plastic material 5 will be rapidly cooled and solidified at the same time. In this embodiment, the cooling system maintains the roller 1 at the constant temperature by using circulating cooling water of 4 to 20°C. 1 can perform the processing step and the solidification step simultaneously, and adjust the coolant temperature of the cooling system according to the imprinting speed of the roller 1 .

In other implementation aspects of this embodiment, when the material to be molded 2 is a curable photosensitive resin, the curing step uses an ultraviolet light. After the processing step is completed, ultraviolet light is emitted toward the plastic material 5 , so that the plastic material 5 is solidified.

In other implementation aspects of this embodiment, the steps will be adjusted according to the material properties of the material 2 to be formed, so it is not necessary to perform the heating step, the coating step, and the curing step.

To sum up, by adjusting and setting the vertical distance H between the axis 10 of the roller 1 and the surface to be formed 21 , the area size of the fitting surface 522 can be adjusted. The manufacturing method of the protective film device of the present invention only needs to prepare one roller 1. The roller 1 has at least one groove 121 with an opening gradually expanding outward. By adjusting and setting the vertical distance H, multiple different plasticities can be produced. Material 5, each of the plastic materials 5 has the fitting surface 522 of different sizes, so there is no need to prepare additional rollers 1 of different specifications and prepare additional storage spaces, so the purpose of the present invention can indeed be achieved.

However, the above are only examples of the present invention, and should not be used to limit the scope of the present invention. All simple equivalent changes and modifications made based on the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by the patent of this invention.

1:Roller 10:Axis 11:Protruding structure 111:Protrusion 12:Concave structure 121: Groove 122: Inclined surface 2: Material to be formed 21: Surface to be formed 3: Grassroots level 4: Conveying device 5: Plastic materials 51: Bottom 52: Imprinted structure 521:ribs 522: Fitting surface 523:First top surface 524:Second top surface L2: Conveying direction L3: direction of rotation H: vertical distance

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is an incomplete three-dimensional schematic diagram of a known manufacturing method of a protective film device; Figure 2 is a step flow chart of an embodiment of the manufacturing method of the protective film device of the present invention; Figure 3 is an incomplete three-dimensional schematic diagram of a processing step of this embodiment, schematically illustrating the situation when a roller sinks into a surface to be formed; Figure 4 is an incomplete cross-sectional schematic diagram of the embodiment at the processing step; and FIG. 5 is an incomplete enlarged cross-sectional view similar to FIG. 4 .

1:Roller

10:Axis

11:Protruding structure

111:Protrusion

12:Concave structure

121: Groove

122: Inclined surface

2: Material to be formed

21: Surface to be formed

3: Grassroots level

4: Conveying device

5: Plastic materials

51: Bottom

52: Imprinted structure

521:ribs

522: Fitting surface

L2: Conveying direction

L3: direction of rotation

H: vertical distance

Claims (10)

A method for manufacturing a protective film device, including the following steps: A preparatory step is to prepare a roller having a protruding structure and a recessed structure recessed radially inward relative to the protruding structure, the recessed structure having at least one groove with an opening gradually expanding outward; and A processing step is to prepare a material to be formed with a surface to be formed, adjust and set the vertical distance between an axis of the roller and the surface to be formed, so that the roller rotates around the axis and rolls and presses relative to the surface to be formed. The protruding structure and the recessed structure sink into the surface to be formed, so that the material to be formed is formed into a plastic material. The plastic material has a bottom and an embossing structure protruding relative to the bottom. The embossing The structure has at least one rib that tapers outward, and a fitting surface formed on a side of the at least one rib away from the bottom. The distance between the fitting surface and the bottom will be adjusted according to the adjusted position of the roller. The vertical distance between the axis and the surface to be formed changes, and the area size of the fitting surface changes at the same time. The manufacturing method of the protective film device according to claim 1, wherein the at least one groove has a fan-shaped cross-section along its transverse extension, and has two grooves extending obliquely from the groove opening toward the axis of the roller and gradually extending from each other. Close and overlapping inclined planes. The manufacturing method of the protective film device according to claim 1, wherein the at least one groove has a generally frustoconical cross-section along its transverse extension, and has a bottom surface, and two grooves extending from opposite ends of the bottom surface toward the bottom surface. The groove openings extend obliquely and gradually move away from each other. The manufacturing method of the protective film device according to claim 2, wherein the recessed structure of the roller has a plurality of intersecting grooves in a mesh shape. The manufacturing method of the protective film device according to claim 1 further includes a heating step after the pre-step and before the processing step, using a heating device to heat the material to be formed, so that the material to be formed is heated to a molten state. The manufacturing method of the protective film device according to claim 5, further comprising a coating step after the heating step and before the processing step, uniformly coating the material to be formed on a base layer, and making the material to be formed has the surface to be formed. The manufacturing method of the protective film device according to claim 1 further includes a curing step after the processing step, preparing a curing device for curing the plastic material. The manufacturing method of the protective film device according to claim 5, wherein the material to be formed is polyolefin, ethylene-vinyl acetate copolymer, and combinations thereof, and the polyolefin can be selected from polyethylene or polypropylene. The manufacturing method of the protective film device according to claim 1 further includes a curing step. The roller is equipped with a cooling system to maintain a constant temperature of the roller. When the processing step is performed, the curing step is performed at the same time. The cooling system always maintains the roller at the constant temperature. When the roller rolls and presses on the surface to be formed, the material to be formed will be formed and cooled and solidified into the plastic material at the same time. The manufacturing method of the protective film device according to claim 7, wherein the curing device is an ultraviolet light source.

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