Composite protective film and production equipment therefor

Abstract

The application discloses a composite protective film and a production equipment thereof. The production equipment comprises a first processing mechanism, a second processing mechanism and a third processing mechanism; the first processing mechanism processes copper foil, bonds the copper foil with foam, and processes the foam; the second processing mechanism comprises first and second processing lines arranged in an up-down mode; the first processing line is used for bonding and processing film material of the composite protective film, and the first processing line is arranged in a reverse direction along a production line, and an output end of the first processing line is connected to an input end of the second processing line; the second processing line is used for bonding the copper foil with the film material to form the composite protective film; and the third processing mechanism is used for cutting an outer frame of the composite protective film. The application can realize the cutting of different layer materials of the composite protective film through one production line, reduces the equipment cost, realizes that the aperture of the copper foil can be larger than the aperture of other layers, and finally avoids the extrusion of the copper foil on the camera when the composite protective film is applied to mobile phone assembly, and improves the product quality.

Description

Technical Field

[0001] This invention relates to the field of mobile phone assembly accessories technology, and in particular to a composite protective film and its production equipment. Background Technology

[0002] During mobile phone assembly, a composite protective film made of materials such as copper foil and foam is typically installed between the screen and the circuit board to provide functions such as cushioning, shock absorption, and electromagnetic shielding. The composite protective film has openings corresponding to the camera position to facilitate camera assembly. However, because the composite protective film itself is relatively thick and the foam has a certain degree of elasticity, the foam can be compressed during assembly, causing the openings to shrink. Simultaneously, the copper foil can be deformed, leading to pressure marks on the lens and reducing product quality.

[0003] In existing technologies, the pores are made after the layers of the composite protective film are laminated, resulting in uniform pore sizes across all layers and thus the aforementioned technical problems. To address this issue, some industry experts have proposed making pores separately for the copper foil and other materials before lamination and cutting. However, using the copper foil as the dividing line, the composite protective film would be divided into at least three semi-finished products, requiring at least three different cutting lines. This would also add extra steps such as winding the semi-finished products and transferring them between different lines, ultimately incurring high equipment costs and reducing the tolerance for product lamination errors, thus affecting the final product quality. Summary of the Invention

[0004] The purpose of this invention is to provide a composite protective film and its production equipment. Only one production line is needed to cut the different layers of the composite protective film separately, reducing equipment costs. Furthermore, the aperture of the copper foil can be larger than that of other layers. Ultimately, when the composite protective film is used for mobile phone assembly, the copper foil can be avoided from squeezing the camera, thus improving product quality.

[0005] To achieve the above objectives, one solution of the present invention is:

[0006] A composite protective film production equipment includes a first processing mechanism, a second processing mechanism, and a third processing mechanism arranged sequentially along a production line. The first processing mechanism is used to process copper foil and bond it to foam, and then process the foam. The second processing mechanism includes a first processing line and a second processing line arranged vertically. The first processing line is used to bond and process the film material of the composite protective film, and the first processing line is arranged in the opposite direction along the production line. The output end of the first processing line is connected to the input end of the second processing line. The second processing line is used to bond copper foil and film material to form a composite protective film. The third processing mechanism is used to cut the outer frame of the composite protective film.

[0007] The first processing mechanism includes a first composite roller group, a first die-cutting roller group, a second composite roller group, a first pressing roller group, and a second die-cutting roller group arranged sequentially along the production line direction, as well as a first feeding roller and a second feeding roller; the first feeding roller feeds copper foil to the first composite roller group, and the copper foil of the first feeding roller passes through the first composite roller group, the first die-cutting roller group and the second composite roller group in sequence before its release film is torn off, and then it enters the first pressing roller group; the second feeding roller feeds foam to the first pressing roller group, and the foam of the second feeding roller is located below the copper foil and passes through the first pressing roller group and the second die-cutting roller group in sequence.

[0008] Preferably, the first processing mechanism further includes a first take-up roller, and the release film of the copper foil passes through the second composite roller group, the first die-cutting roller group and the first composite roller group in sequence before being wound up by the first take-up roller; the foam of the second feeding roller passes under the first composite roller group, the first die-cutting roller group and the second composite roller group in sequence before entering the first pressing roller group.

[0009] Preferably, the first processing mechanism further includes a third feeding roller, a second taking-up roller, a fourth feeding roller, and a third taking-up roller; the third feeding roller feeds PET dust removal film to the first composite roller group and adheres it to the upper surface of the copper foil, and the PET dust removal film from the third feeding roller passes through the first composite roller group and the first die-cutting roller group before being wound up by the second taking-up roller; the fourth feeding roller feeds PET dust removal film to the first pressing roller group and adheres it to the upper surface of the copper foil, and the PET dust removal film from the fourth feeding roller passes through the first pressing roller group and the second die-cutting roller group before being wound up by the third taking-up roller.

[0010] Preferably, the first processing mechanism further includes a second pressing roller group, a third composite roller group, a fifth feeding roller, and a fourth take-up roller; the second pressing roller group and the third composite roller group are arranged sequentially along the production line direction and are located between the second die-cutting roller group and the second processing mechanism; the fifth feeding roller feeds PET dust removal film to the second pressing roller group and adheres it to the upper surface of the copper foil, and the PET dust removal film of the fifth feeding roller is wound up by the fourth take-up roller after passing through the second pressing roller group and the third composite roller group.

[0011] The second processing mechanism includes a third pressing roller group, a third die-cutting roller group, a fourth die-cutting roller group, a fourth pressing roller group, a fourth composite roller group, a fifth die-cutting roller group, a fifth pressing roller group, a sixth die-cutting roller group, a fifth composite roller group, and a sixth composite roller group arranged sequentially along the production line direction; the first processing line is formed by the path above the third pressing roller group from the fifth composite roller group, the sixth die-cutting roller group, the fifth pressing roller group, the fifth die-cutting roller group, the fourth composite roller group, the fourth pressing roller group, the fourth die-cutting roller group, the third die-cutting roller group to the third pressing roller group; the second processing line is formed by the path below the sixth composite roller group from the third pressing roller group, the third die-cutting roller group, the fourth die-cutting roller group, the fourth pressing roller group, the fourth composite roller group, the fifth die-cutting roller group, the fifth pressing roller group, the sixth die-cutting roller group, the fifth composite roller group to the sixth composite roller group.

[0012] Preferably, the second processing mechanism further includes a sixth feed roller, a seventh feed roller, a fifth take-up roller, an eighth feed roller, a sixth take-up roller, a ninth feed roller, a seventh take-up roller, a tenth feed roller, an eleventh feed roller, an eighth take-up roller, a ninth take-up roller, a twelfth feed roller, and a tenth take-up roller connected to the first processing line; the sixth feed roller and the seventh feed roller respectively feed the light-shielding film and the matte film to the sixth die-cutting roller group, and the fifth take-up roller winds up the release film of the light-shielding film and the waste material processed by the sixth die-cutting roller group; the eighth feed roller feeds the silicone film to the fifth pressing roller group, and the silicone film of the eighth feed roller passes sequentially through the fifth pressing roller. The release film is wound up by the sixth take-up roller after the fifth die-cutting roller group and the fourth composite roller group; the ninth feed roller feeds silicone film to the fourth pressing roller group, and the silicone film from the ninth feed roller is wound up by the seventh take-up roller after passing through the fourth pressing roller group; the tenth and eleventh feed rollers feed kinesiol and handle tape to the fourth die-cutting roller group respectively, and the eighth and ninth take-up rollers respectively wind up the waste handle tape and kinesiol after processing by the fourth die-cutting roller group; the twelfth feed roller feeds raw film to the third die-cutting roller group, and the tenth take-up roller winds up the waste raw film after processing by the third die-cutting roller group.

[0013] Preferably, the second processing mechanism further includes a thirteenth feed roller and an eleventh take-up roller; the thirteenth feed roller feeds the textured bottom protective film to the fifth composite roller group, and the textured bottom protective film of the thirteenth feed roller passes through the first processing line and the second processing line in sequence and is then wound up by the eleventh take-up roller on the output side of the sixth composite roller group.

[0014] Preferably, the second processing mechanism further includes a fourteenth feed roller and a twelfth take-up roller disposed between the fourth composite roller group and the fifth die-cutting roller group; the fourteenth feed roller feeds adhesive tape to the silicone film surface of the eighth feed roller to pick up waste material, and the twelfth take-up roller winds it up.

[0015] The third processing mechanism includes a seventh composite roller group, a seventh die-cutting roller group, and an eighth die-cutting roller group arranged sequentially along the production line direction, as well as a thirteenth take-up roller and a fourteenth take-up roller; the film material enters the seventh composite roller group after being bonded to the copper foil on the foam; the seventh die-cutting roller group cuts the outer frame of the copper foil and the waste is discharged by the thirteenth take-up roller; the eighth die-cutting roller group cuts the outer frame of the foam and the waste is discharged by the fourteenth take-up roller.

[0016] Preferably, the third processing mechanism further includes a fifteenth feeding roller and a fifteenth taking-up roller; the fifteenth feeding roller feeds the textured bottom protective film to the seventh composite roller group, and the textured bottom protective film of the fifteenth feeding roller passes through the seventh composite roller group, the seventh die-cutting roller group and the eighth die-cutting roller group in sequence before being wound up by the fifteenth taking-up roller.

[0017] The second solution of the present invention is:

[0018] A composite protective film, produced by the equipment for producing the composite protective film, comprises, from top to bottom, a light-blocking film, a matte film, a first silicone film, a second silicone film, a silicone adhesive, a handle tape, a base film, copper foil, and foam.

[0019] After adopting the above technical solution, the present invention has the following technical effects:

[0020] (1) The first processing mechanism processes the copper foil and foam first, and cuts holes in both. The opening of the copper foil can be made larger according to actual needs to meet the product requirements of not squeezing the camera during mobile phone assembly, thereby improving product quality. At the same time, the order of processing the copper foil first and then processing the foam also facilitates the waste discharge after foam processing, and avoids waste sticking to the copper foil.

[0021] (2) After the second processing mechanism processes the film material from the first processing line set in reverse, it is sent to the input end of the second processing line to be bonded to the copper foil on the foam to complete the bonding of each layer of the composite protective film. Then the third processing mechanism processes the outer frame to ensure the uniformity of the outer frame of the composite film material and prevent unevenness.

[0022] (3) The first processing mechanism, the second processing mechanism and the third processing mechanism of the present invention are continuous operations of a production line, which do not require material winding and transfer, saving processing steps, improving production efficiency, and controlling equipment costs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a specific embodiment of the present invention;

[0024] Figure 2This is a schematic diagram of the structure of the first processing mechanism according to a specific embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the second processing mechanism according to a specific embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the third processing mechanism in a specific embodiment of the present invention;

[0027] Explanation of icon numbers:

[0028] a----First processing unit; b----Second processing unit; c----Third processing unit;

[0029] d----First processing line; e----Second processing line; 1----First composite roller group;

[0030] 2----First die-cutting roller group; 3----Second composite roller group; 4----First pressing roller group;

[0031] 5----Second die-cutting roller group; 6----First feeding roller; 7----Second feeding roller;

[0032] 8----First take-up roller; 9----Third feed roller; 10---Second take-up roller;

[0033] 11---Fourth feed roller; 12---Third take-up roller; 13---Second pressing roller group;

[0034] 14---Third composite roller group; 15---Fifth feed roller; 16---Fourth take-up roller;

[0035] 17---Third pressing roller group; 18---Third die-cutting roller group; 19---Fourth die-cutting roller group;

[0036] 20---Fourth pressing roller group; 21---Fourth composite roller group; 22---Fifth die-cutting roller group;

[0037] 23---Fifth pressing roller group; 24---Sixth die-cutting roller group; 25---Fifth composite roller group;

[0038] 26---Sixth composite roller group; 27---Sixth feed roller; 28---Seventh feed roller;

[0039] 29---Fifth take-up roller; 30---Eighth feed roller; 31---Sixth take-up roller;

[0040] 32---Ninth feed roller; 33---Seventh take-up roller; 34---Tenth feed roller;

[0041] 35---Eleventh feed roller; 36---Eighth take-up roller; 37---Ninth take-up roller;

[0042] 38---Twelfth feed roller; 39---Tenth take-up roller; 40---Thirteenth feed roller;

[0043] 41---Eleventh take-up roller; 42---Fourteenth feed roller; 43---Twelfth take-up roller;

[0044] 44---Seventh composite roller group; 45---Seventh die-cutting roller group; 46---Eighth die-cutting roller group;

[0045] 47---Thirteenth receiving roller; 48---Fourteenth receiving roller; 49---Fifteenth feeding roller;

[0046] 50---The fifteenth receiving roller;

[0047] Additionally, in the diagram, "rubber" represents a rubber roller, "smooth" represents a smooth steel roller, "concave" represents a concave roller, and "D" represents a cutter roller. Cutter rollers with different serial numbers have different cutter shapes. Detailed Implementation

[0048] To further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0050] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of protection of the invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0051] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0052] In the description of the embodiments of the present invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, or the orientation or positional relationship in which those skilled in the art are usually understood. It is only for the purpose of simplifying the description of the embodiments of the present invention, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention.

[0053] Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0054] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for mutual communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0055] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0056] The following disclosure provides many different embodiments or examples for implementing different structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0057] Furthermore, this invention provides examples of various specific processes and materials, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0058] refer to Figures 1 to 4 As shown, the present invention discloses a production equipment for a composite protective film, including a first processing mechanism a, a second processing mechanism b, and a third processing mechanism c arranged sequentially along the production line direction;

[0059] The first processing unit a is used to process copper foil and attach it to foam, and then process the foam;

[0060] The second processing mechanism b includes a first processing line d and a second processing line e arranged vertically; the first processing line d is used to bond and process the membrane material of the composite protective film, and the first processing line d is arranged in the opposite direction of the production line, and the output end of the first processing line d is connected to the input end of the second processing line e; the second processing line e is used to bond copper foil and membrane material to form a composite protective film.

[0061] The third processing unit c is used to cut the outer frame of the composite protective film.

[0062] The following shows a specific embodiment of the above-mentioned production equipment.

[0063] First processing unit a:

[0064] The aforementioned first processing mechanism a includes a first composite roller group 1, a first die-cutting roller group 2, a second composite roller group 3, a first pressing roller group 4, a second die-cutting roller group 5, and a first feeding roller 6 and a second feeding roller 7, arranged sequentially along the production line direction. The first feeding roller 6 feeds copper foil to the first composite roller group 1. After the copper foil passes through the first composite roller group 1, the first die-cutting roller group 2, and the second composite roller group 3 in sequence, its release film is torn off, and it then enters the first pressing roller group 4. The second feeding roller 7 feeds foam to the first pressing roller group 4. The foam of the second feeding roller 7 is located below the copper foil and passes through the first pressing roller group 4 and the second die-cutting roller group 5 in sequence. Thus, the first processing mechanism a completes the cutting of holes in the copper foil through the first die-cutting roller group 2, the bonding of the copper foil and the foam through the first pressing roller group 4, and the cutting of holes in the foam through the second die-cutting roller group 5.

[0065] Furthermore, the aforementioned first processing mechanism a also includes a first take-up roller 8. The release film of the copper foil passes sequentially through the second composite roller group 3, the first die-cutting roller group 2, and the first composite roller group 1 before being wound up by the first take-up roller 8. The foam of the second feeding roller 7 passes sequentially below the first composite roller group 1, the first die-cutting roller group 2, and the second composite roller group 3 before entering the first pressing roller group 4. This makes the movement paths of the copper foil, the release film of the copper foil, and the foam divided into three layers: upper, middle, and lower, which do not interfere with each other, making more reasonable use of the space on the production line and avoiding excessive space occupation.

[0066] Secondly, the aforementioned first processing mechanism also includes a third feeding roller 9, a second taking-up roller 10, a fourth feeding roller 11, and a third taking-up roller 12. The third feeding roller 9 feeds PET dust removal film to the first composite roller group 1 and adheres it to the upper surface of the copper foil. After passing through the first composite roller group 1 and the first die-cutting roller group 2, the PET dust removal film from the third feeding roller 9 is wound up by the second taking-up roller 10. This can realize the padding and buffering functions during copper foil processing, while removing waste material and dust from the copper foil after processing. The fourth feeding roller 11 feeds PET dust removal film to the first pressing roller group 4 and adheres it to the upper surface of the copper foil. After passing through the first pressing roller group 4 and the second die-cutting roller group 5, the PET dust removal film from the fourth feeding roller 11 is wound up by the third taking-up roller 12. This can realize the padding and buffering functions during foam processing, while removing waste material and dust from the copper foil after processing.

[0067] Furthermore, the aforementioned first processing mechanism a also includes a second pressing roller group 13, a third composite roller group 14, a fifth feeding roller 15, and a fourth take-up roller 16; the second pressing roller group 13 and the third composite roller group 14 are arranged sequentially along the production line direction and are located between the second die-cutting roller group 5 and the second processing mechanism b; the fifth feeding roller 15 feeds PET dust removal film to the second pressing roller group 13 and laminates it onto the upper surface of the copper foil. After the PET dust removal film of the fifth feeding roller 15 passes through the second pressing roller group 13 and the third composite roller group 14, it is wound up by the fourth take-up roller 16. This allows for an additional processing step on the surface of the copper foil after the copper foil and foam have been processed and laminated and before entering the second processing mechanism for lamination with the film material, thereby improving product quality.

[0068] Second processing unit b:

[0069] The aforementioned second processing mechanism b includes a third pressing roller group 17, a third die-cutting roller group 18, a fourth die-cutting roller group 19, a fourth pressing roller group 20, a fourth composite roller group 21, a fifth die-cutting roller group 22, a fifth pressing roller group 23, a sixth die-cutting roller group 24, a fifth composite roller group 25, and a sixth composite roller group 26 arranged sequentially along the production line direction; the fifth composite roller group 25, the sixth die-cutting roller group 24, the fifth pressing roller group 23, the fifth die-cutting roller group 22, and the fourth composite roller group 21... The first processing line d is formed by the upper paths of the fourth pressing roller group 20, the fourth die-cutting roller group 19, the third die-cutting roller group 18 to the third pressing roller group 17; the second processing line e is formed by the lower paths of the third pressing roller group 17, the third die-cutting roller group 18, the fourth die-cutting roller group 19, the fourth pressing roller group 20, the fourth composite roller group 21, the fifth die-cutting roller group 22, the fifth pressing roller group 23, the sixth die-cutting roller group 24, the fifth composite roller group 25 to the sixth composite roller group 26. The first processing line d and the second processing line e are formed in the upper and lower paths of the parallel third pressing roller group 17 to the sixth composite roller group 26, respectively. The film material of the composite protective film can be processed against the direction of the production line and then conveyed to the front end of the second processing mechanism b (that is, the input end of the second processing line e) to be bonded with the copper foil on the foam, thereby reducing the floor space, saving equipment costs and reducing intermediate processes.

[0070] Furthermore, the aforementioned second processing mechanism b also includes a sixth feed roller 27, a seventh feed roller 28, a fifth take-up roller 29, an eighth feed roller 30, a sixth take-up roller 31, a ninth feed roller 32, a seventh take-up roller 33, a tenth feed roller 34, an eleventh feed roller 35, an eighth take-up roller 36, a ninth take-up roller 37, a twelfth feed roller 38, and a tenth take-up roller 39 connected to the first processing line d; the sixth feed roller 27 and the seventh feed roller 28 respectively feed the light-shielding film and the matte film to the sixth die-cutting roller group 24, and the fifth take-up roller 29 winds up the release film of the light-shielding film and the waste material processed by the sixth die-cutting roller group 24; the eighth feed roller 30 feeds the silicone film to the fifth pressing roller group 23, and the silicone film of the eighth feed roller 30 is... After passing through the fifth pressing roller group 23, the fifth die-cutting roller group 22, and the fourth composite roller group 21, the release film is wound up by the sixth take-up roller 31; the ninth feed roller 32 feeds silicone film to the fourth pressing roller group 20, and the silicone film of the ninth feed roller 32 is wound up by the seventh take-up roller 33 after passing through the fourth pressing roller group 20; the tenth feed roller 34 and the eleventh feed roller 35 feed kinesiol and handle tape to the fourth die-cutting roller group 19 respectively, and the eighth take-up roller 36 and the ninth take-up roller 37 respectively wind up the waste material of handle tape and kinesiol after processing by the fourth die-cutting roller group 19; the twelfth feed roller 38 feeds raw film to the third die-cutting roller group 18, and the tenth take-up roller 39 winds up the waste material of raw film after processing by the third die-cutting roller group 18. At this point, the processing and lamination of each layer of the membrane material can be completed, forming a membrane material that is then transported to the second processing line e for lamination with copper foil. The second processing line e mainly uses multiple sets of rollers to achieve complete lamination of the membrane material and copper foil.

[0071] Secondly, the aforementioned second processing mechanism b also includes a thirteenth feed roller 40 and an eleventh take-up roller 41. The thirteenth feed roller 40 feeds the textured bottom protective film to the fifth composite roller group 25. The textured bottom protective film from the thirteenth feed roller 40 passes sequentially through the first processing line d and the second processing line e, and is then wound up by the eleventh take-up roller 41 on the output side of the sixth composite roller group 26. Feeding the textured bottom protective film to the second processing mechanism b can realize the padding and buffering functions during the processing of film materials.

[0072] Furthermore, the aforementioned second processing mechanism b also includes a fourteenth feed roller 42 and a twelfth take-up roller 43 disposed between the fourth composite roller group 21 and the fifth die-cutting roller group 22; the fourteenth feed roller 42 conveys adhesive tape to the silicone film surface of the eighth feed roller 30 to pick up waste material, and the twelfth take-up roller 43 winds it up.

[0073] Third processing unit c:

[0074] The aforementioned third processing unit c includes a seventh composite roller group 44, a seventh die-cutting roller group 45, and an eighth die-cutting roller group 46 arranged sequentially along the production line direction, as well as a thirteenth take-up roller 47 and a fourteenth take-up roller 48. After the film material is bonded to the copper foil on the foam, it enters the seventh composite roller group 44. The seventh die-cutting roller group 45 cuts the outer frame of the copper foil, and the waste is discharged by the thirteenth take-up roller 47. The eighth die-cutting roller group 46 cuts the outer frame of the foam, and the waste is discharged by the fourteenth take-up roller 48. This completes the outer frame forming of the composite protective film.

[0075] Furthermore, the aforementioned third processing mechanism c also includes a fifteenth feed roller 49 and a fifteenth take-up roller 50; the fifteenth feed roller 49 feeds the textured bottom protective film to the seventh composite roller group 44, and the textured bottom protective film fed by the fifteenth feed roller 49 passes sequentially through the seventh composite roller group 44, the seventh die-cutting roller group 45, and the eighth die-cutting roller group 46 before being wound up by the fifteenth take-up roller 50. Feeding the textured bottom protective film to the third processing mechanism c can realize the padding and buffering functions when cutting the outer frame of the composite protective film.

[0076] The present invention also discloses a composite protective film, which can be prepared by the above-described production process, comprising, from top to bottom, a light-shielding film, a matte film, a first silicone film, a second silicone film, a silicone adhesive, a handle tape, a base film, a copper foil, and foam.

[0077] Through the above scheme, the present invention first processes copper foil and foam, and cuts holes in both. The openings of the copper foil can be made larger according to actual needs to meet the product requirements of not squeezing the camera during mobile phone assembly, thereby improving product quality. At the same time, the order of processing copper foil first and then foam facilitates waste removal after foam processing and avoids waste material sticking to copper foil. The second processing mechanism b processes the film material from the first processing line d, which is set in reverse, and then sends it to the input end of the second processing line e to be bonded to the copper foil on the foam, completing the bonding of each layer of the composite protective film. Then, the third processing mechanism c processes the outer frame, ensuring the uniformity of the outer frame of the composite film material and preventing unevenness. The first processing mechanism a, the second processing mechanism b, and the third processing mechanism c of the present invention are continuous operations of a production line, which does not require material winding and transfer, saving processing steps, improving production efficiency, and controlling equipment costs.

[0078] The above embodiments and figures are not intended to limit the product form and style of the present invention. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.

Claims

1. A production device of a composite protective film, characterized in that: a first processing mechanism, a second processing mechanism and a third processing mechanism are sequentially arranged along the direction of the production line; the first processing mechanism is used for processing a copper foil, adhering the copper foil to a foam, and processing the foam; the second processing mechanism comprises a first processing line and a second processing line arranged in a vertical manner; the first processing line is used for adhering and processing a film material of the composite protective film, and the first processing line is arranged in a reverse direction along the direction of the production line; the output end of the first processing line is connected to the input end of the second processing line; the second processing line is used for adhering the copper foil and the film material to form the composite protective film; the third processing mechanism is used for cutting an outer frame of the composite protective film; the first processing mechanism comprises a first composite roller group, a first die-cutting roller group, a second composite roller group, a first pressing roller group, a second die-cutting roller group, a first feeding roller and a second feeding roller, which are sequentially arranged along the direction of the production line; the first feeding roller feeds the copper foil to the first composite roller group; the copper foil of the first feeding roller sequentially passes through the first composite roller group, the first die-cutting roller group and the second composite roller group, and then tears off a release film, and then enters the first pressing roller group; the second feeding roller feeds the foam to the first pressing roller group; the foam of the second feeding roller is located below the copper foil and sequentially passes through the first pressing roller group and the second die-cutting roller group; the first processing mechanism further comprises a first collecting roller; the release film of the copper foil sequentially passes through the second composite roller group, the first die-cutting roller group and the first composite roller group, and then is wound by the first collecting roller; the foam of the second feeding roller sequentially passes through the first composite roller group, the first die-cutting roller group and the second composite roller group, and then enters the first pressing roller group; the first processing mechanism further comprises a third feeding roller, a second collecting roller, a fourth feeding roller and a third collecting roller; the third feeding roller feeds a PET dust removal film to the first composite roller group and adheres the PET dust removal film to the upper surface of the copper foil; the PET dust removal film of the third feeding roller passes through the first composite roller group and the first die-cutting roller group, and then is wound by the second collecting roller; the fourth feeding roller feeds a PET dust removal film to the first pressing roller group and adheres the PET dust removal film to the upper surface of the copper foil; the PET dust removal film of the fourth feeding roller passes through the first pressing roller group and the second die-cutting roller group, and then is wound by the third collecting roller.

2. The production device of the composite protective film according to claim 1, characterized in that: the first processing mechanism further comprises a second pressing roller group, a third composite roller group, a fifth feeding roller and a fourth collecting roller; the second pressing roller group and the third composite roller group are sequentially arranged along the direction of the production line and are located between the second die-cutting roller group and the second processing mechanism; the fifth feeding roller feeds a PET dust removal film to the second pressing roller group and adheres the PET dust removal film to the upper surface of the copper foil; the PET dust removal film of the fifth feeding roller passes through the second pressing roller group and the third composite roller group, and then is wound by the fourth collecting roller.

3. The production device of the composite protective film according to claim 1, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The second processing mechanism comprises a third pressing roller group, a third die cutting roller group, a fourth die cutting roller group, a fourth pressing roller group, a fourth composite roller group, a fifth die cutting roller group, a fifth pressing roller group, a sixth die cutting roller group, a fifth composite roller group and a sixth composite roller group arranged in sequence along the direction of the production line; The first processing line is formed by the upper paths of the fifth composite roller group, the sixth die cutting roller group, the fifth pressing roller group, the fifth die cutting roller group, the fourth composite roller group, the fourth pressing roller group, the fourth die cutting roller group, the third die cutting roller group and the third pressing roller group; The second processing line is formed by the lower paths of the third pressing roller group, the third die cutting roller group, the fourth die cutting roller group, the fourth pressing roller group, the fourth composite roller group, the fifth die cutting roller group, the fifth pressing roller group, the sixth die cutting roller group, the fifth composite roller group and the sixth composite roller group.

4. The production equipment for the composite protective film according to claim 3, characterized in that: The second processing mechanism further comprises a sixth feeding roller, a seventh feeding roller, a fifth collecting roller, an eighth feeding roller, a sixth collecting roller, a ninth feeding roller, a seventh collecting roller, a tenth feeding roller, an eleventh feeding roller, an eighth collecting roller, a ninth collecting roller, a twelfth feeding roller and a tenth collecting roller connected with the first processing line; The sixth feeding roller and the seventh feeding roller respectively feed the light shielding film and the dummy film to the sixth die cutting roller group, and the fifth collecting roller collects the release film of the light shielding film and the waste material processed by the sixth die cutting roller group; The eighth feeding roller feeds the silica gel film to the fifth pressing roller group, and the silica gel film of the eighth feeding roller is sequentially passed through the fifth pressing roller group, the fifth die cutting roller group and the fourth composite roller group, and then the release film thereof is collected by the sixth collecting roller; The ninth feeding roller feeds the silica gel film to the fourth pressing roller group, and the silica gel film of the ninth feeding roller is passed through the fourth pressing roller group, and then the release film thereof is collected by the seventh collecting roller; The tenth feeding roller and the eleventh feeding roller respectively feed the marina glue and the handle adhesive tape to the fourth die cutting roller group, and the eighth collecting roller and the ninth collecting roller respectively collect the waste material of the handle adhesive tape and the marina glue processed by the fourth die cutting roller group; The twelfth feeding roller feeds the original film to the third die cutting roller group, and the tenth collecting roller collects the waste material of the original film processed by the third die cutting roller group.

5. The production equipment for the composite protective film according to claim 3, characterized in that: The second processing mechanism further comprises a thirteenth feeding roller and an eleventh collecting roller; The thirteenth feeding roller feeds the textured bottom protective film to the fifth composite roller group, and the textured bottom protective film of the thirteenth feeding roller is sequentially passed through the first processing line and the second processing line, and then is collected by the eleventh collecting roller at the output side of the sixth composite roller group.

6. The production equipment for the composite protective film according to claim 4, characterized in that: The second processing mechanism further comprises a fourteenth feeding roller and a twelfth collecting roller arranged between the fourth composite roller group and the fifth die cutting roller group; The fourteenth feeding roller feeds the adhesive tape to the surface of the silica gel film of the eighth feeding roller to stick the waste material, and the twelfth collecting roller collects the waste material. 7.The production equipment of the composite protective film according to claim 1, characterized in that: the third processing mechanism comprises a seventh composite roller group, a seventh die-cutting roller group and an eighth die-cutting roller group arranged in sequence along the direction of the production line, and a thirteenth material collecting roller and a fourteenth material collecting roller; the film material and the copper foil on the foam are adhered and then enter the seventh composite roller group; the seventh die-cutting roller group cuts the outer frame of the copper foil and the thirteenth material collecting roller discharges the waste; the eighth die-cutting roller group cuts the outer frame of the foam and the fourteenth material collecting roller discharges the waste. 8.The production equipment of the composite protective film according to claim 7, characterized in that: the third processing mechanism further comprises a fifteenth feeding roller and a fifteenth material collecting roller; the fifteenth feeding roller supplies the textured backing protective film to the seventh composite roller group; the textured backing protective film of the fifteenth feeding roller passes through the seventh composite roller group, the seventh die-cutting roller group and the eighth die-cutting roller group in sequence and is then wound by the fifteenth material collecting roller. 9.A composite protective film produced by the production equipment of the composite protective film according to any one of claims 1 to 8, characterized in that: it comprises, from top to bottom, a light-shielding film, a matte film, a first silica gel film, a second silica gel film, a mar gel, a handle tape, a raw film, a copper foil and a foam. ​ ​ ​ ​ ​ ​

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