A foam cutting and attaching process for backlights

Abstract

This application relates to the field of display technology and provides a foam cutting and attaching process for backlights. A second release film is attached to and cut on a first release film to obtain a connecting part and a supporting part. Foam is then attached to and cut on the second release film to obtain finished foam. The finished foam is located at the connection point between the connecting part and the supporting part, allowing the finished foam to be attached to the connecting part. Using the connecting part as an intermediate connector increases the attachment area, facilitates the automatic attachment of the finished foam by picking up the connecting part, and improves the stability of foam attachment. Multiple finished foam strips can be attached to the connecting part, enabling simultaneous attachment of multiple finished foam strips, effectively improving attachment efficiency. The attachment process can be positioned using the connecting part, effectively improving attachment accuracy to meet the dimensional tolerance requirements of foam attachment on backlight products.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a foam cutting and attaching process for backlights. Background Technology

[0002] In the assembly and production of display devices, foam needs to be attached to backlight products (such as backlight sources or backlight modules). In the traditional foam attachment process, single-sided adhesive foam is cut into strips, and then each strip is manually attached to the backlight product one by one. Due to the strong adhesion between the foam and the backlight product, it is not easy to readjust the position of the foam after it is attached. Therefore, it is usually only attached once. In addition, it is not easy for a person to hold a single strip of foam. If the holding position is incorrect, the foam is easy to stick to the hand. This results in poor precision and stability of the entire foam attachment process, poor attachment effect, and low attachment efficiency, which cannot meet the increasingly high dimensional tolerance requirements for foam attachment on backlight products.

[0003] Therefore, existing technologies have shortcomings and need to be improved and developed. Summary of the Invention

[0004] The technical problem to be solved by this application is to provide a foam cutting and attaching process for backlights, which addresses the above-mentioned deficiencies of the prior art. The aim is to solve the problems of poor precision and stability and low attaching efficiency in the prior art, which involves cutting single-sided adhesive foam into strips and then manually attaching each strip of foam to the backlight product one by one.

[0005] The technical solution adopted by this application to solve the technical problem is as follows: a foam cutting and attaching process for backlights, including the following steps:

[0006] Unwind the first release film and the second release film, and then attach the second release film onto the first release film;

[0007] The second release film is cut to obtain a connecting portion and a supporting portion;

[0008] Unwind the foam and attach the foam to the second release film;

[0009] The foam is cut and the waste material is removed to obtain finished foam, wherein the finished foam is located at the connection position between the connecting part and the supporting part;

[0010] Peel the connecting part and the finished foam from the first release film and attach them to the backlight;

[0011] Separate the connecting part from the finished foam.

[0012] The foam cutting and attaching process, wherein cutting the second release film to obtain the connecting portion and the supporting portion specifically includes:

[0013] The second release film is contour-cut on the first release film to obtain the connecting part and the supporting part, and the first positioning hole is punched on the first release film and the second release film.

[0014] The foam cutting and attaching process, wherein cutting the foam specifically includes:

[0015] The foam is cut using the first positioning hole as the positioning reference.

[0016] The foam cutting and attaching process, wherein cutting the foam using the first positioning hole as a positioning reference, specifically includes:

[0017] Using the first positioning hole as the positioning reference, the foam is contour-cut on the second release film, and the second positioning hole is punched into the foam, the first release film and the second release film.

[0018] The foam cutting and attaching process, wherein peeling the connecting portion and the finished foam from the first release film and attaching them to the backlight specifically includes:

[0019] Using the second positioning hole as a positioning reference, the connecting part and the finished foam are peeled off from the first release film and attached to the backlight.

[0020] The aforementioned foam cutting and attaching process, wherein the removal of waste material specifically includes:

[0021] Unwind one end of the waste material and attach it to the waste material, then rewind the other end of the waste material.

[0022] The foam cutting and attaching process, wherein the step of cutting the foam and removing waste material, further includes:

[0023] The finished roll is obtained by collecting the rolls.

[0024] The aforementioned foam cutting and bonding process, wherein the process of winding up to obtain the finished roll, further includes:

[0025] Unwind the height-limiting film and attach it to the edge of the second release film, wherein the height-limiting film is disposed adjacent to the finished foam.

[0026] The foam cutting and attaching process, wherein the step of peeling the connecting portion and the finished foam from the first release film and attaching them to the backlight source, further includes:

[0027] Unwind the finished roll.

[0028] The foam cutting and bonding process, wherein the unwinding of the first release film and the second release film, and the bonding of the second release film onto the first release film, further includes:

[0029] Prepare raw materials and place them on a roll. The raw materials include the first release film, the second release film, and the foam.

[0030] This application provides a foam cutting and attaching process. A second release film is attached to and cut on a first release film to obtain a connecting part and a supporting part. Foam is then attached to and cut on the second release film to obtain a finished foam. The finished foam is located at the connection position between the connecting part and the supporting part, so that the finished foam is attached to the connecting part. Using the connecting part as an intermediate connector increases the attachment area, facilitates the automatic attachment of the finished foam by picking up the connecting part, and improves the stability of foam attachment. Multiple finished foams can be attached to the connecting part, enabling the attachment of multiple finished foams at one time, effectively improving the attachment efficiency. The attachment process is convenient for positioning the attachment process using the connecting part, effectively improving the attachment accuracy to meet the dimensional tolerance requirements of foam attachment on backlight products. Attached Figure Description

[0031] Figure 1 This is a process flow diagram of the foam cutting and attaching process provided in this application;

[0032] Figure 2 This is a partial process diagram of the foam cutting and attaching process provided in this application;

[0033] Figure 3 This is a structural diagram of the finished roll provided in this application;

[0034] Figure 4 This is a cross-sectional view of the finished roll provided in this application;

[0035] Figure 5 This is a partial structural diagram of the combined structure of the first release film and the second release film obtained after the foam cutting and pasting process step S200 provided in this application;

[0036] Figure 6 This is a partial structural diagram of the combined structure of the first release film, the second release film, and the foam obtained after cutting the foam in the foam cutting and attaching process step S400 provided in this application.

[0037] Figure 7This is a schematic diagram of the combined structure of the connecting part obtained by peeling off in step S500 of the foam cutting and attaching process provided in this application and the finished foam.

[0038] Figure 8 This is a cross-sectional schematic diagram of the combined structure of the connecting part obtained by peeling off in step S500 of the foam cutting and attaching process provided in this application and the finished foam.

[0039] Figure 9 This is a schematic diagram of the connection structure of the connecting part, the finished foam and the backlight obtained after the foam cutting and attaching process step S500 provided in this application.

[0040] Figure 10 This is a schematic diagram of the connection structure between the finished foam and the backlight after the foam cutting and attaching process step S600 provided in this application is completed.

[0041] Figure 11 This is a comparison diagram of the effects of finished foam attachment on the backlight and traditional single-strip foam attachment in this application;

[0042] Figure 12 This is a process flow diagram of some implementation methods of the foam cutting and attaching process provided in this application;

[0043] Figure 13 This is a process flow diagram of some implementation methods of the foam cutting and attaching process provided in this application;

[0044] Figure 14 This is a schematic diagram of the adhesive iron structure in step S52 of the foam cutting and attaching process provided in this application;

[0045] Explanation of reference numerals in the attached figures:

[0046] 10. Finished roll; 11. First release film; 12. Second release film; 13. Foam; 14. First positioning hole; 15. Second positioning hole; 16. Waste material adhesive; 17. Height-limiting film; 121. Connecting part; 122. Supporting part; 1211. Grip area; 131. Waste material; 132. Finished foam; 20. Backlight; 21. Adhesive iron; 30. Laminating machine; 31. Cutting machine. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this application clearer and more explicit, the following detailed description of this application is provided with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0048] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" and "several" mean two or more.

[0049] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0050] In the assembly and production of display devices, foam needs to be attached to backlight products (such as backlight sources or backlight modules). In the traditional foam attachment process, single-sided adhesive foam is cut into strips, and then each strip is manually attached to the backlight product one by one. Due to the strong adhesion between the foam and the backlight product, it is not easy to readjust the position of the foam after it is attached. Therefore, it is usually only attached once. In addition, it is not easy for a person to hold a single strip of foam. If the holding position is incorrect, the foam is easy to stick to the hand. This results in poor precision and stability of the entire foam attachment process, poor attachment effect, and low attachment efficiency, which cannot meet the increasingly high dimensional tolerance requirements for foam attachment on backlight products.

[0051] This application addresses the problems of poor precision, stability, and low efficiency in the existing technology of cutting single-sided adhesive foam into strips and then manually attaching each strip to a backlight product. It provides a foam cutting and attaching process for backlights, where foam is attached and cut onto a second release film to obtain finished foam. The finished foam is located at the connection between the connecting part and the support part, allowing it to be attached to the connecting part. Using the connecting part as an intermediate connector increases the attachment area, facilitates automatic attachment of the finished foam, and improves the stability of foam attachment. Multiple finished foam strips can be attached to the connecting part, enabling simultaneous attachment of multiple strips and effectively improving attachment efficiency. The attachment process is conveniently positioned using the connecting part, effectively improving attachment precision to meet the dimensional tolerance requirements of foam attachment on backlight products. Please refer to the following embodiments for details.

[0052] like Figure 1 and Figure 2 As shown, this application provides a foam cutting and attaching process for a backlight, including the following steps:

[0053] S100: Unwind the first release film 11 and the second release film 12, and attach the second release film 12 onto the first release film 11;

[0054] Specifically, such as Figure 2 As shown, in this step, a first release film 11 and a second release film 12 in rolls are used to facilitate rapid unwinding and feeding of the first release film 11 and the second release film 12 during the production process; that is, the first release film 11 and the second release film 12 are unwound and fed; during the feeding process, the second release film 12 is laid on the first release film 11, and the second release film 12 is bonded to the first release film 11; a laminating machine 30 can be used to bond the second release film 12 to the first release film 11. 1. After the second release film 12 and the first release film 11 are unwound, they are mounted on the laminating machine 30 and run straight to achieve the lamination of the second release film 12 onto the first release film 11. Since the release film does not have adhesiveness or only slight adhesiveness after contacting a specific material under limited conditions, the first release film 11 and the second release film 12 after lamination have no adhesiveness or only weak adhesiveness, which makes it easy to separate the first release film 11 and the second release film 12 in subsequent processes.

[0055] Among them, such as Figure 3 and Figure 4As shown, the first release film 11 serves as the bottom layer, and the second release film 12 serves as the intermediate layer. The width of the second release film 12 is the same as that of the first release film 11, or the width of the second release film 12 is smaller than that of the first release film 11, in order to facilitate production and reduce costs. The first release film 11 and the second release film 12 can be made of the same material or different materials. Specifically, materials such as PET (polyethylene terephthalate) or PE (polyethylene) can be selected, but this application does not limit them.

[0056] S200: Cut the second release film 12 to obtain the connecting part 121 and the supporting part 122;

[0057] like Figure 4 and Figure 5 As shown, the second release film 12 is cut according to a certain contour on the first release film 11 to obtain a connecting portion 121 and a supporting portion 122; wherein, the connecting portion 121 is embedded in the supporting portion 122, that is, the connecting portion 121 is in the middle position, and the supporting portion 122 serves as the first frame; after cutting the second release film 12, at least one supporting portion 122 and several connecting portions 121 are obtained, and the several connecting portions 121 are embedded on the same supporting portion 122, or several connecting portions 121 are embedded on each of the multiple supporting portions 122; with the material feeding direction as the length The width direction is orthogonal to the length direction, and the width dimension of the connecting part 121 is smaller than the width dimension of the second release film 12. During the process of cutting the outline of the second release film 12, only the outline of the second release film 12 is cut, and the outline of the first release film 11 is not cut. After cutting, the connecting part 121 and the support part 122 are attached to the first release film 11, which makes it easy to directly separate the connecting part 121 from the first release film 11. The second release film 12 can be cut using a cutting machine 31. The cutting pattern is preset on the cutting machine 31 so that the connecting part 121 and the support part 122 are obtained after cutting.

[0058] S300: Unwind the foam 13 and attach the foam 13 to the second release film 12;

[0059] like Figure 2As shown, in this step, rolled foam 13 is used to facilitate rapid unwinding and feeding of foam 13 during production; that is, foam 13 is unwound and fed. During the feeding process of foam 13, first release film 11, and second release film 12, the first release film 11 and second release film 12 are already bonded together. The adhesive side of foam 13 is then placed on the second release film 12, and foam 13 and second release film 12 are bonded together. A bonding machine 30 can be used to... Foam 13 is bonded to the second release film 12. The combined structure of the first release film 11 and the second release film 12 is mounted on the laminating machine 30 and moved in a straight line. Foam 13 is also mounted on the laminating machine 30 to achieve the bonding of foam 13 to the second release film 12. Foam 13 serves as the top layer and is attached to the second release film 12. Since the adhesive layer of foam 13 has only a weak adhesion to the second release film 12, it is easier to separate foam 13 from the second release film 12.

[0060] The foam 13 used in this application can be single-sided or double-sided adhesive foam, depending on the actual needs. Foam 13 usually has its own paper attached to the adhesive layer of foam 13 to protect the adhesive layer and prevent sticking, facilitating the unwinding of the rolled foam 13. If foam 13 is single-sided adhesive foam, the paper on foam 13 is separated before attaching it to the second release film 12. The paper can be connected to the roll roller. While the foam 13 is being unwound and continuously attached to the second release film 12, the roll roller continuously rewinds the paper to achieve streamlined operation and improve the efficiency of attaching foam 13 to the second release film 12. If foam 13 is double-sided adhesive foam, only the paper on the side of foam 13 attached to the second release film 12 is separated. The separation method is the same as the separation method for the paper on single-sided adhesive foam.

[0061] S400, the foam 13 is cut and the waste material 131 is removed to obtain the finished foam 132, wherein the finished foam 132 is located at the connection position between the connecting part 121 and the supporting part 122;

[0062] like Figure 2 , Figure 3 , Figure 4 and Figure 6As shown, foam 13 is cut according to a certain contour on the second release film 12 to obtain finished foam 132 to be attached to the backlight product (e.g., backlight source or backlight module), and waste material 131; wherein, finished foam 132 is embedded in waste material 131, that is, waste material 131 serves as a second frame, and finished foam 132 is embedded in the second frame; during the process of cutting the contour of foam 13, only foam 13 is processed, and the contours of the second release film 12 and the first release film 11 are not cut, and the cut finished foam 132 and waste material 131 are also cut. All 31 are attached to the second release film 12, which allows the waste material 131 to be easily separated from the second release film 12. After the waste material 131 is separated, only the finished foam 132 is attached to the second release film 12. The second release film 12 can be cut using a cutting machine 31. The cutting machine 31 is pre-set with a contour blade to obtain the finished foam 132 after cutting. The finished foam 132 is located at the connection position between the connecting part 121 and the supporting part 122, that is, part of the finished foam 132 is attached to the connecting part 121 and the other part is attached to the supporting part 122.

[0063] S500: Peel the connecting part 121 and the finished foam 132 from the first release film 11 and attach them to the backlight 20;

[0064] like Figure 4 , Figures 6 to 9As shown, a portion of the finished foam 132 is adhered to the connecting portion 121. When the connecting portion 121 is peeled off from the first release film 11, the finished foam 132, attached to the connecting portion 121, is peeled off from the support portion 122. The peeled finished foam 132 and the connecting portion 121 are then attached to the backlight product (e.g., a backlight source or backlight module), and the adhesive layer on the finished foam 132 exposed outside the connecting portion 121 adheres to the backlight product. A robotic arm with suction cups can be used to pick up the product. The device picks up the connecting part 121, thereby automatically peeling the connecting part 121 and the finished foam 132 from the first release film 11. Then, the connecting part 121 is attached to the backlight product, thus achieving automatic attachment of the finished foam 132. Alternatively, manual peeling can be selected, using the connecting part 121 as the gripping point. This method is convenient and effectively avoids the foam sticking to the hand when directly gripping a single piece of foam, which affects the attachment of the foam and improves the stability of the attachment process. Qualitative positioning, with the connector 121 positioned relative to the backlight product, effectively ensures the accuracy of the attachment, meeting the dimensional tolerance requirements of the foam 13 attached to the backlight product. The attachment process can be performed on a CCD (charge-coupled device) machine, where the connector 121 and the backlight product are aligned, and the connector 121 and the finished foam 132 are attached to the backlight product. This effectively improves positioning accuracy, thereby enhancing the positional accuracy of the foam 13 attached to the backlight product. Furthermore, since the second release film 12 is made of PET or PE and has a relatively small thickness, the connector 121 is transparent or has good light transmittance. This allows users to easily observe the backlight product and adjust its position through the connector 121 during the attachment of the finished foam 132, ensuring that the finished foam 132 is accurately attached to the designated position on the backlight product, further improving the positional accuracy of the finished foam 132 attached to the backlight product.

[0065] The outline of the connecting part 121 is designed according to the size of the backlight product to be attached, so as to facilitate the subsequent positioning of the foam 13 on the backlight product by the connecting part 121 relative to the backlight product. For example, one side of the backlight product can be used as a positioning reference, and the edge of the connecting part 121 can be aligned with the positioning reference to ensure that the finished foam 132 is accurately attached to the corresponding position of the backlight product, which can effectively improve the positional accuracy of attaching the foam 13 on the backlight product.

[0066] S600, Separate the connecting portion 121 from the finished foam 132. For example... Figure 10 As shown, since the foam 13 and the second release film 12 have only a weak adhesion, the connecting part 121 can be easily separated from the finished foam 132. The finished foam 132 and the backlight product have a relatively strong adhesion, so that during the separation of the connecting part 121, the finished foam 132 is stably adhered to the backlight product.

[0067] like Figure 11 As shown, the foam cutting and attaching process provided in this application is used to attach finished foam to both ends of the backlight product. In the traditional method, a single strip of foam is manually attached to the middle of the backlight product, resulting in a misalignment between the middle strip and the finished foam at both ends. In the traditional foam 13 attachment process, the single-sided adhesive foam 13 is cut into single strips, and then manually attached to the backlight product one by one. This process suffers from poor precision and stability, leading to poor foam 13 attachment (e.g., the foam is easily misaligned; parts of the foam bulge and are not fully attached), and low attachment efficiency. In contrast, the foam cutting and attaching process provided in this application for the backlight 20 attaches and cuts the second release film 12 onto the first release film 11 to obtain the connecting portion 12. 1. The connecting part 121 and the support part 122 are used to attach and cut foam 13 on the second release film 12 to obtain finished foam 132. The finished foam 132 is located at the connection position between the connecting part 121 and the support part 122, so that the finished foam 132 is attached to the connecting part 121. The connecting part 121 is used as an intermediate connector to increase the attachment area, which facilitates the automatic attachment of finished foam 132 by picking up the connecting part 121, and improves the stability of foam 13 attachment. Multiple finished foam 132 can be attached to the connecting part 121, which can realize the attachment of multiple finished foam 132 at one time, effectively improving the attachment efficiency. The attachment process is convenient for positioning of the attachment process by the connecting part 121, which effectively improves the attachment accuracy to meet the dimensional tolerance requirements of foam 13 attachment on backlight products.

[0068] like Figure 7 and Figure 8 As shown, in some embodiments, two finished foams 132 are symmetrically arranged at both ends of the same connecting portion 121.

[0069] It is understandable that attaching two finished foams 132 to a connecting part 121 can enable the simultaneous attachment of two foams 13 to a backlight product, effectively improving the attachment efficiency.

[0070] like Figure 7 and Figure 8 As shown, in some embodiments, one-third to one-half of the width of the finished foam 132 is attached to the connecting portion 121.

[0071] It is understandable that if the width of the adhesive portion between the finished foam 132 and the connecting part 121 is too small, the finished foam 132 is easy to detach from the connecting part 121 and it is not easy to peel the finished foam 132 off the supporting part 122. If the width of the connecting part 121 is too large, it is not easy to separate the connecting part 121 from the finished foam 132 after the finished foam 132 is attached to the backlight product. However, attaching 1 / 3 to 1 / 2 of the width of the finished foam 132 to the connecting part 121 can effectively ensure that the finished foam 132 can be easily peeled off from the supporting part 122 and that the connecting part 121 can be easily separated from the finished foam 132 after attachment.

[0072] like Figure 3 , Figure 6 and Figure 7 As shown, in some embodiments, the connecting part 121 is provided with a gripping area 1211 to facilitate manual gripping of the gripping area 1211 to peel the connecting part 121 from the first release film 11, attach the connecting part 121 to the backlight product, and separate the connecting part 121 from the finished foam 132 after attachment, effectively improving the stability and convenience of the attachment process.

[0073] like Figure 2 and Figure 12 As shown, in some embodiments, the method further includes the following step before step S100:

[0074] S10. Prepare raw materials and place them on the roll. The raw materials include the first release film 11, the second release film 12, and the foam 13. Prepare the raw materials before production to ensure smooth production. The required raw materials include at least the first release film 11, the second release film 12, and the foam 13. The first release film 11, the second release film 12, and the foam 13 are all in rolls. Place the rolls of the first release film 11, the second release film 12, and the foam 13 on the roll of the production line or equipment to facilitate feeding and feeding of the first release film 11, the second release film 12, and the foam 13 during production, which helps improve production efficiency.

[0075] like Figure 2 and Figure 5 As shown, in some embodiments, step S200 specifically includes:

[0076] The second release film 12 is contour-cut on the first release film 11 to obtain the connecting part 121 and the supporting part 122, and the first positioning hole 14 is punched on the first release film 11 and the second release film 12.

[0077] It is understood that contour cutting is performed on the first release film 11 to obtain the connecting portion 121 and the supporting portion 122. The first release film 11 and the second release film 12 are also punched to obtain the first positioning hole 14. This allows the foam 13 to be cut later using the first positioning hole 14 as a positioning reference, resulting in a qualified finished foam 132. Specifically, the finished foam 132 is located on a single connecting portion 121, ensuring accurate attachment of the finished foam 132 to the backlight product. The first positioning hole 14 can be punched at the connecting portion 121 or the supporting portion 122. Preferably, it is punched at the supporting portion 122. The molding at position 22 avoids affecting the structural stability of the connecting part 121 and prevents deformation during the picking process of the connecting part 121, thereby affecting the adhesion effect and quality of the finished foam 132. This application does not limit the number of first positioning holes 14, but at least one first positioning hole 14 is provided for each connecting part 121 to facilitate the positioning of the connecting part 121 and facilitate accurate cutting of the foam 13. Contour cutting and punching can be performed on the same cutting machine 31, with corresponding contour cutters and punching cutters set on the cutting machine 31. Contour cutting and punching can also be performed on different cutting machines 31, depending on the actual equipment conditions and production costs.

[0078] like Figure 2 As shown, in some embodiments, cutting the foam 13 specifically includes:

[0079] Using the first positioning hole 14 as a positioning reference, the foam 13 is cut.

[0080] It is understandable that, during the cutting process of foam 13, using the first positioning hole 14 as a positioning reference can effectively ensure that the finished foam 132 obtained by cutting is located at the predetermined position of the second release film 12, that is, at the connection position between the connecting part 121 and the support part 122, and the finished foam 132 is adhered to a single connecting part 121. This provides an effective guarantee for the subsequent accurate attachment of the finished foam 132 to the corresponding position of the backlight product, ensuring the attachment accuracy of the finished foam 132. In practical applications, the cutting machine 31 is equipped with positioning posts. When the combined structure of the first release film 11, the second release film 12 and the foam 13 passes through the cutting machine 31, it is positioned by the positioning posts and the first positioning hole 14, realizing accurate judgment of the cutting position and avoiding the situation of cutting position deviation.

[0081] like Figure 2 , Figure 5 and Figure 6 In some embodiments, the step of cutting the foam 13 using the first positioning hole 14 as a positioning reference specifically includes:

[0082] Using the first positioning hole 14 as the positioning reference, the foam 13 is contour-cut on the second release film 12, and the second positioning hole 15 is punched on the foam 13, the first release film 11 and the second release film 12.

[0083] It is understood that the foam 13 is contour-cut on the second release film 12 to obtain finished foam 132 and waste material 131. The foam 13, the second release film 12, and the first release film 11 are also punched to create second positioning holes 15. This allows for accurate picking of the connecting part 121 using a suction cup-equipped robotic arm or similar device, using the second positioning hole 15 as a positioning reference. This facilitates the automation of peeling the connecting part 121 and the finished foam 132 from the first release film 11. When cutting the foam 13, the first positioning hole 14 is used as a positioning reference to ensure that qualified finished foam 132 is obtained. Specifically, the finished foam 132 is positioned at the connection point between the connecting part 121 and the support part 122, and adheres to a single connecting part 121, thus ensuring the subsequent removal of the foam... 13. Accurately attach to the backlight product; specifically, the second positioning hole 15 is punched in the area where the waste material 131 is located. The punching position can be located between two symmetrically arranged finished foams 132, or it can be located in the outer area of ​​the two symmetrically arranged finished foams 132. Preferably, it is formed on the outer area of ​​the two symmetrically arranged finished foams 132 to avoid affecting the structural stability of the connecting part 121 and to avoid deformation of the connecting part 121 during the picking process, thereby affecting the attachment effect and attachment quality of the finished foam 132; the second positioning hole 15 can be formed in the same position or a different position from the first positioning hole 14. Preferably, the second positioning hole 15 can be formed in the same position as the first positioning hole 14, which can avoid the first positioning hole 14 causing positioning interference during the positioning process when the picking device automatically peels off the connecting part 121, thereby affecting the accurate and smooth peeling of the connecting part 121;

[0084] This application does not limit the number of second positioning holes 15. At least one second positioning hole 15 is provided for each connecting part 121 to facilitate positioning of the connecting part 121, which is beneficial for accurately and smoothly peeling the connecting part 121 from the first release film 11. The outline cutting of foam 13 and the punching of foam 13, second release film 12 and first release film 11 can be performed on the same cutting machine 31. Corresponding outline cutters and punching cutters are provided on the cutting machine 31. Alternatively, the outline cutting of foam 13 and the punching of foam 13, second release film 12 and first release film 11 can be performed on different cutting machines 31, depending on the actual equipment conditions and production costs.

[0085] In some implementations, step S500 specifically includes:

[0086] Using the second positioning hole 15 as a positioning reference, the connecting part 121 and the finished foam 132 are peeled off from the first release film 11 and attached to the backlight 20.

[0087] like Figure 6 As shown, it can be understood that during the process of peeling the connector 121 from the first release film 11, if the suction cup robotic arm or other picking device does not pick up the connector 121 at the correct position, the connector 121 may be difficult to peel off or cannot be effectively peeled off, which may cause deformation of the connector 121 and thus affect the subsequent bonding effect. Using the second positioning hole 15 as the positioning reference can effectively ensure that the suction cup robotic arm or other picking device accurately picks up the corresponding position of the connector 121, thereby ensuring the smooth peeling of the connector 121. At the same time, after ensuring that the suction cup robotic arm or other picking device accurately picks up the connector 121, the connector 121 can be accurately attached to the backlight product, which can effectively improve the positional accuracy of the foam 13 attached to the backlight product and avoid the occurrence of misalignment of the finished foam 132.

[0088] like Figure 2 As shown, in some embodiments, the removal of waste material 131 specifically includes:

[0089] Unwind one end of the waste material adhesive 16 and attach it to the waste material 131, then wind up the other end of the waste material adhesive 16.

[0090] It is understandable that using the waste adhesive 16 to remove waste 131 allows the waste 131 to be peeled off from the second release film 12, leaving only the finished foam 132 on the second release film 12. The waste adhesive 16 has an adhesive layer that can be attached to the waste adhesive 16, thereby allowing the waste 131 to be peeled off from the second release film 12. The structure of the waste adhesive 16 is similar to that of common adhesive tapes, but the position of the adhesive layer is set differently. The position of the adhesive layer of the waste adhesive 16 can be adjusted according to the position of the finished foam 132. The corresponding settings should avoid the finished foam 132 to prevent adhesion to the finished foam 132. That is, the adhesive layer on the waste adhesive 16 is only set at the position of the corresponding waste 131. For example, if two finished foams 132 are attached to a single connecting part 121, the adhesive layer of the waste adhesive 16 is set between the two finished foams 132 and the outer area to ensure that the waste adhesive 16 and the waste 131 have sufficient adhesion area and sufficient adhesion force to achieve smooth peeling of the waste 131 from the second release film 12.

[0091] This step uses rolled waste adhesive 16, meaning the raw materials also include waste adhesive 16. The rolled waste adhesive 16 is placed on a roller, unwound and fed. During the feeding process, the waste adhesive 16 adheres to the waste material 131, thus bonding it together. Then, the waste adhesive 16 with the bonded waste material 131 is wound up. One end is unwound and bonded to the waste material 131, while the other end is wound up to collect the bonded waste material 131. This allows for the rapid peeling and collection of the waste material 131, improving the peeling efficiency. At the same time, it enables the unwound waste material 131 to be wound up and stored, preventing it from being discarded arbitrarily and taking up production space.

[0092] like Figure 2 , Figure 3 and Figure 13 As shown, in some embodiments, step S400 is followed by:

[0093] S50, rewind to obtain 10 finished rolls.

[0094] It is understandable that after cutting the foam 13 and removing the waste material 131, a combined structure of the first release film 11, the second release film 12, and the finished foam 132 is obtained. The combined structure is then wound up to obtain the finished roll 10, which facilitates the rapid and continuous production of the finished foam 132, avoids the production being affected by the progress of the subsequent foam 13 bonding process, effectively improves the utilization rate of the equipment, helps reduce costs, and also facilitates the storage of the finished foam 132.

[0095] like Figure 2 , Figure 3 , Figure 4 and Figure 13 As shown, in some embodiments, step S50 is further included before:

[0096] S410. Unwind the height limiting film 17 and attach the height limiting film 17 to the edge of the second release film 12, wherein the height limiting film 17 is disposed adjacent to the finished foam 132.

[0097] It is understandable that if two finished foams 132 are attached to a single connecting part 121, and the height limiting film 17 is attached to the outer area of ​​the two finished foams 132 and is arranged adjacent to the finished foams 132, preferably, one side of the height limiting film 17 is connected to the finished foam 132, and the other side of the height limiting film 17 is on the edge of the first release film 11, which can be at the same position as or close to the edge of the first release film 11, so as not to protrude from the edge of the first release film 11; after the waste material 131 is peeled off from the first release film 11, there is a certain distance between the finished foam 132 and the edge of the first release film 11, and there is a certain height difference between them, forming a drop area. When the combined structure of the first release film 11, the second release film 12 and the finished foam 132 is wound up, the winding process is prone to deviation due to the influence of the drop area, and the finished foam 132 is easily deformed, which affects the quality of the finished foam 132. The height limiting film 17 has the functions of limiting and raising, filling the gap area, thus ensuring the smooth winding of the combined structure of the first release film 11, the second release film 12 and the finished foam 132, and avoiding the finished foam 132 being deformed during the winding process; the thickness of the finished foam 132 is equal to or slightly less than the thickness of the height limiting film 17 to ensure the raising effect of the height limiting film 17; in this step, the height limiting film 17 is used in rolls, that is, the raw materials also include the height limiting film 17. The roll of height limiting film 17 is placed on the roller, the height limiting film 17 is unwound and fed, and the height limiting film 17 is bonded to the second release film 12 during the feeding process; preferably, if two finished foam 132 are attached to a single connecting part 121, at least two rolls of height limiting film 17 are used. The two rolls of height limiting film 17 are fed and bonded to the second release film 12 respectively, and are located on opposite sides of the two finished foam 132 respectively.

[0098] like Figure 3 and Figure 13 As shown, in some embodiments, the method further includes the following step before step S500:

[0099] S51. Unwind the finished roll 10.

[0100] It is understandable that the finished roll 10 is unwound and fed to facilitate the use of the finished foam 132 on the finished roll 10 in the subsequent bonding process. That is, the connecting part 121 and the finished foam 132 are peeled off from the finished roll 10, which is conducive to the automatic peeling and automatic bonding of the finished foam 132, and improves the accuracy, stability and bonding efficiency of bonding foam 13 to the backlight product.

[0101] like Figure 9 , Figure 10 , Figure 13 and Figure 14 As shown, in some embodiments, the method further includes the following step before step S500:

[0102] S52. Clean the glue plate 21 and load it with materials. Before attaching the finished foam 132 to the glue plate 21, clean the glue plate 21 to ensure product cleanliness.

[0103] The attachment to the backlight 20 specifically includes:

[0104] It is attached to the adhesive plate 21. The finished foam 132 can be attached to the adhesive plate 21 first, and then the adhesive plate 21 can be assembled to obtain the backlight 20.

[0105] like Figure 13 As shown, in some embodiments, step S600 is followed by:

[0106] S700, Assemble the light strip and light guide plate onto the glue plate 21;

[0107] S710. The diffuser, upper brightness enhancement film, lower brightness enhancement film and light-shielding adhesive are attached to the light guide plate to obtain the backlight 20. The above steps are performed on a CCD (charge-coupled device) machine, and the backlight 20 product is obtained by assembling through the above steps.

[0108] S720, Inkjet printing and scanning on the glue plate 21; Inkjet printing on the glue plate 21 is used to record product information such as batch number of the backlight 20 for easy after-sales traceability, and scanning is used to enter product information for archiving.

[0109] S730. Perform a full photoelectric performance inspection on the backlight 20. The full photoelectric performance inspection of the backlight 20 is performed to determine whether the product is qualified; preferably, after the full photoelectric performance inspection of the backlight 20, a manual re-inspection of the backlight 20 is also conducted to ensure the product quality of the backlight 20.

[0110] In summary, this application provides a foam cutting and attaching process for a backlight, comprising the steps of: unwinding a first release film and a second release film, and attaching the second release film to the first release film; cutting the second release film to obtain a connecting portion and a supporting portion; unwinding the foam and attaching the foam to the second release film; cutting the foam and removing waste material to obtain a finished foam, wherein the finished foam is located at the connection position between the connecting portion and the supporting portion; peeling the connecting portion and the finished foam from the first release film and attaching them to the backlight; and separating the connecting portion from the finished foam. A second release film is attached to and cut on the first release film to obtain a connecting part and a supporting part. Foam is then attached to and cut on the second release film to obtain finished foam. The finished foam is located at the connection position between the connecting part and the supporting part, so that the finished foam is attached to the connecting part. Using the connecting part as an intermediate connector increases the attachment area, facilitates the automatic attachment of the finished foam by picking up the connecting part, and improves the stability of foam attachment. Multiple finished foams can be attached to the connecting part, and multiple finished foams can be attached at one time, which effectively improves the attachment efficiency. The attachment process is convenient for positioning by using the connecting part, which effectively improves the attachment accuracy to meet the dimensional tolerance requirements of foam attachment on backlight products.

[0111] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A foam cutting and attaching process for backlights, characterized in that, Including the following steps: Unwind the first release film and the second release film, and then attach the second release film onto the first release film; The second release film is cut to obtain a connecting portion and a supporting portion; Unwind the foam and attach the foam to the second release film; The foam is cut and the waste material is removed to obtain finished foam, wherein the finished foam is located at the connection position between the connecting part and the supporting part; Peel the connecting part and the finished foam from the first release film and attach them to the backlight; Separate the connecting part from the finished foam.

2. The foam cutting and attaching process according to claim 1, characterized in that, The step of cutting the second release film to obtain the connecting portion and the supporting portion specifically includes: The second release film is contour-cut on the first release film to obtain the connecting part and the supporting part, and the first positioning hole is punched on the first release film and the second release film.

3. The foam cutting and attaching process according to claim 2, characterized in that, The cutting of the foam specifically includes: The foam is cut using the first positioning hole as the positioning reference.

4. The foam cutting and attaching process according to claim 3, characterized in that, The step of cutting the foam using the first positioning hole as a positioning reference specifically includes: Using the first positioning hole as the positioning reference, the foam is contour-cut on the second release film, and the second positioning hole is punched into the foam, the first release film and the second release film.

5. The foam cutting and attaching process according to claim 4, characterized in that, The step of peeling the connecting portion and the finished foam from the first release film and attaching them to the backlight specifically includes: Using the second positioning hole as a positioning reference, the connecting part and the finished foam are peeled off from the first release film and attached to the backlight.

6. The foam cutting and attaching process according to claim 1, characterized in that, The removal of waste materials specifically includes: Unwind one end of the waste material and attach it to the waste material, then rewind the other end of the waste material.

7. The foam cutting and attaching process according to claim 1, characterized in that, The process of cutting the foam and removing waste material then includes: The finished roll is obtained by collecting the rolls.

8. The foam cutting and attaching process according to claim 7, characterized in that, The process of winding the coil to obtain the finished roll also includes: Unwind the height-limiting film and attach it to the edge of the second release film, wherein the height-limiting film is disposed adjacent to the finished foam.

9. The foam cutting and attaching process according to claim 7, characterized in that, Before peeling the connecting portion and the finished foam from the first release film and attaching them to the backlight, the process further includes: Unwind the finished roll.

10. The foam cutting and attaching process according to claim 1, characterized in that, Before unwinding the first release film and the second release film, and attaching the second release film to the first release film, the process further includes: Prepare raw materials and place them on a roll. The raw materials include the first release film, the second release film, and the foam.

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