Method for manufacturing curved touch screen

Abstract

The present invention discloses a method for manufacturing a curved touch screen, wherein a curved cover plate having a flat plate portion extending straightly and at least one curved plate portion extending in a curved shape or extending obliquely relative to the flat plate portion is formed by forming a plastic mold of the curved touch screen outside a touch sensor sheet of the curved touch screen, wherein the plastic mold of the curved touch screen comprises an upper mold and a lower mold, wherein the upper mold is provided with an injection hole, and the lower mold is provided with a first positioning column; the touch sensor sheet body and the flexible circuit board are pressed and fixed together; the touch sensor sheet is positioned on the lower mold by being placed in cooperation with the first positioning column; the upper mold is covered on the lower mold; and molten resin is injected into the mold cavity from the injection hole, so that the molten resin is solidified in the mold cavity to form a curved cover plate that is plastic-sealed outside the touch sensor sheet. The present invention produces a curved touch screen by directly forming a curved cover plate outside the touch sensor sheet, which effectively solves the bottleneck problem that irregular curved touch screens cannot be mass-produced.

Description

Technical Field

[0001] The present invention relates to the technical field of curved touch screen production, and in particular to a plastic packaging mold of a curved touch screen and a method for manufacturing the curved touch screen. Background Art

[0002] The touch screen is formed by the combination of a cover plate and a touch sensor sheet. There are two main factors that determine the shape of the touch screen. One is the shape of the cover plate, and the other is the way the cover plate and the touch sensor sheet are fixed. In the prior art, the manufacturing method of the touch screen is to first separately manufacture the molded cover plate and the touch sensor sheet, and then assemble and fix the cover plate and the touch sensor sheet together. This manufacturing method can only produce a regular-shaped touch screen without a curved surface or a 2.5D touch screen with curved edges, but it is difficult to produce a touch screen with a curved surface (irregular curved shape). As a result, the shape of the touch screen in the prior art is basically a regular shape without a curved surface or a 2.5D shape with curved edges. There are very few curved and shaped touch screens with irregular curved surfaces, which makes it difficult to meet the user's demand for curved and shaped touch screens. Specifically, the difficulty in the manufacturing method of the prior art to produce curved and shaped touch screens is mainly caused by the following two reasons:

[0003] 1) One of the reasons is that it is difficult to process curved and shaped (irregular curved shapes) covers using existing equipment, or the processing yield is low and the conditions for mass production are not met.

[0004] 2) Another reason is: even if the mass production problem of curved and special-shaped cover plates is solved, the subsequent assembly and fixation of the curved and special-shaped cover plates and the touch sensor sheet is also a thorny problem, which is specifically reflected in: In the prior art, the cover plate and the functional sheet are fixed by using an optical glue (solid and liquid) using a flip machine or a water glue machine. Among them, the solid optical glue is OCA (Optically Clear Adhesive), which is only suitable for using a flip machine to attach OCA to the cover plate and the touch sensor sheet and fix the two, while the flip machine can only make OCA fit on a flat cover plate or a touch sensor sheet. The liquid glue is LOCA (Liquid Optical Clear Adhesive), which is only suitable for using a water glue machine to attach LOCA to the cover plate and the touch sensor sheet and fix the two, while the water glue machine can only make LOCA fit on a flat cover plate or a touch sensor sheet. Summary of the invention

[0005] The first object of the present invention is to provide a plastic encapsulation mold for a curved touch screen, which aims to solve the technical problem that it is difficult to produce a touch screen with an irregular curved surface in the prior art.

[0006] To achieve the above-mentioned purpose, the solution provided by the present invention is: a plastic encapsulation mold for a curved touch screen, which is used for plastic encapsulating and molding a curved cover plate having a flat plate portion extending straightly and at least one curved plate portion extending in a curved shape or extending obliquely relative to the flat plate portion outside a touch sensor sheet of the curved touch screen, the plastic encapsulation mold for the curved touch screen comprising an upper mold and a lower mold, the upper mold and the lower mold being buckled and enclosed to form a cavity for accommodating the touch sensor sheet and for plastic encapsulating and forming the curved cover plate outside the touch sensor sheet, the cavity comprising a first sub-cavity extending straightly for molding the flat plate portion and at least one second sub-cavity communicating with the first sub-cavity and extending in a curved shape or extending obliquely relative to the first sub-cavity for molding the curved plate portion, the upper mold is provided with an injection hole communicating with the first sub-cavity or the second sub-cavity, and the lower mold is provided with a plurality of first positioning posts extending in the first sub-cavity for inserting and positioning a touch sensor sheet.

[0007] Optionally, the mold cavity is further provided with a slot for the flexible circuit board at the end of the touch sensor sheet to be inserted and positioned; and / or,

[0008] The lower mold is also provided with an ejection mechanism for ejecting the curved touch screen from the mold cavity.

[0009] As a preferred embodiment of the present invention, the second sub-cavity is provided with a second sub-cavity, which is obliquely arranged on one side of the first sub-cavity, and the lower mold is also provided with a plurality of second positioning columns extending into the second sub-cavity for positioning another touch sensor sheet.

[0010] Optionally, the mold cavity further includes an arc-shaped transition sub-cavity disposed between the first sub-cavity and the second sub-cavity and extending in an arc shape.

[0011] Optionally, the lower mold is provided with two relatively inclined bosses on the side facing the upper mold, each of the first positioning columns is protruded on one of the bosses, and each of the second positioning columns is protruded on the other of the bosses, and the upper mold is provided with a concave cavity on the side facing the lower mold, and the concave cavity covers the two bosses and cooperates with the bosses to form the cavity.

[0012] As another preferred embodiment of the present invention, the second sub-cavity is provided with one, and the second sub-cavity is curved or inclined on one side of the first sub-cavity.

[0013] Optionally, the lower mold is further provided with a plurality of protrusions extending into the second sub-cavity for forming a plurality of through holes in the bent plate portion.

[0014] As another preferred embodiment of the present invention, there are at least two second sub-cavities, each of which is curved or inclined relative to the first sub-cavity and is arranged on at least two sides of the first sub-cavity, and at least two of the second sub-cavities have opposite bending directions or inclined directions.

[0015] Optionally, the first sub-cavity is rectangular, and there are four second sub-cavities, which are defined as a first side sub-cavity, a second side sub-cavity, a third side sub-cavity and a fourth side sub-cavity, wherein the first side sub-cavity and the second side sub-cavity are respectively arranged on two opposite sides of the first sub-cavity, and the third side sub-cavity and the fourth side sub-cavity are arranged on two opposite sides of the first sub-cavity, the first side sub-cavity and the second side sub-cavity.

[0016] The second object of the present invention is to provide a method for manufacturing a curved touch screen, which uses the above-mentioned plastic encapsulation mold of the curved touch screen to plastic-encapsulate a curved cover plate having a flat plate portion and at least one bent plate portion bent or folded relative to the flat plate portion outside a touch sensor sheet of the curved touch screen;

[0017] The plastic sealing molding method of the curved cover plate is as follows:

[0018] Positioning the touch sensor sheet on the lower mold by cooperating with the positioning column;

[0019] Putting the upper mold cover on the lower mold;

[0020] The molten resin is injected into the cavity from the injection hole, so that the molten resin is solidified in the cavity to form the curved cover plate which is plastic-sealed outside the touch sensor sheet.

[0021] The plastic encapsulation mold of the curved touch screen and the manufacturing method of the curved touch screen provided by the present invention produce the curved touch screen by directly plastic encapsulating the curved cover plate outside the touch sensor plate, thereby eliminating the subsequent assembly process of the curved cover plate and the touch sensor plate, and effectively solving the problem that the curved cover plate and the touch sensor plate in the irregular curved touch screen are difficult to assemble; and the curved cover plate is plastic encapsulated by the plastic encapsulation mold, which has the advantages of easy processing, high processing yield, and conducive to mass production. Specifically, the present invention designs the mold cavity of the plastic encapsulation mold to include a first sub-cavity extending straight and at least one second sub-cavity connected to the first sub-cavity and extending in a curved shape or extending obliquely relative to the first sub-cavity. In this way, through the different combination optimization design of the first sub-cavity and the second sub-cavity, it is conducive to plastic encapsulation to form curved cover plates of various irregular curved shapes, effectively solving the bottleneck problem that irregular curved touch screens cannot be mass-produced, improving the production efficiency of irregular curved touch screens, reducing the production cost of irregular curved touch screens, and meeting the different needs of users for irregular curved touch screens. In addition, the present invention positions the touch sensor sheet by providing a positioning column assembly extending into the first sub-cavity on the lower mold. In this way, the touch sensor sheet can be accurately placed and positioned in the cavity, and the touch sensor sheet will not shift during the plastic packaging molding process, thereby helping to ensure the production yield of the curved touch screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 1 is a three-dimensional schematic diagram of a plastic encapsulation mold for a curved touch screen provided in Embodiment 1 of the present invention;

[0024] Figure 2 yes Figure 1 Schematic diagram of the cross section of AA;

[0025] Figure 3 yes Figure 2 A partial enlarged schematic diagram of point C in the middle;

[0026] Figure 4 yes Figure 1 Schematic cross-section of the middle BB;

[0027] Figure 5 yes Figure 4 A partial enlarged schematic diagram of point D in the middle;

[0028] Figure 61 is an exploded schematic diagram of a plastic encapsulation mold for a curved touch screen provided in Embodiment 1 of the present invention;

[0029] Figure 7 is an exploded schematic diagram of the lower mold provided in the first embodiment of the present invention;

[0030] Figure 8 It is an exploded schematic diagram of a plastic encapsulation mold and a curved touch screen provided in Embodiment 1 of the present invention;

[0031] Fig. 9 is a schematic structural diagram of a curved touch screen provided in Embodiment 1 of the present invention;

[0032] Fig.10 is a three-dimensional schematic diagram of a plastic encapsulation mold for a curved touch screen provided in Embodiment 2 of the present invention;

[0033] Fig.11 yes Fig.10 Schematic cross-section of the EE;

[0034] Fig.12 yes Fig.11 A partial enlarged schematic diagram of point F in the middle;

[0035] Fig.13 is an exploded schematic diagram of a plastic encapsulation mold for a curved touch screen provided in Embodiment 2 of the present invention;

[0036] Fig.14 is an exploded schematic diagram of the lower mold provided in the second embodiment of the present invention;

[0037] Fig.15 is an exploded schematic diagram of a plastic encapsulation mold and a curved touch screen provided in Embodiment 2 of the present invention;

[0038] Fig.16 is a schematic structural diagram of a curved touch screen provided in Embodiment 2 of the present invention;

[0039] Fig.17 is a three-dimensional schematic diagram of a plastic encapsulation mold for a curved touch screen provided in Embodiment 3 of the present invention;

[0040] Fig.18 yes Fig.17 Schematic cross-section of the middle GG;

[0041] Fig.19 yes Fig.18 A local enlarged schematic diagram of point I in the middle;

[0042] Fig. 20 yes Fig.17 Schematic cross-section of the middle HH;

[0043] Fig.21 yes Fig. 20A partial enlarged schematic diagram of the J in the middle;

[0044] Fig. 22 It is an exploded schematic diagram of a plastic encapsulation mold and a curved touch screen provided in Embodiment 3 of the present invention;

[0045] Fig.23 It is a schematic diagram of the structure of the curved touch screen provided in the third embodiment of the present invention. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0048] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0049] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0050] Embodiment 1:

[0051] like Figure 1-9As shown, the encapsulation mold 100 of the curved touch screen 200 provided in the first embodiment of the present invention is used to encapsulate the curved cover plate 220 having a flat plate portion 221 extending straight and at least one curved plate portion 222 extending in a curved shape or extending obliquely relative to the flat plate portion 221, outside the touch sensor sheet 210 of the curved touch screen 200. The encapsulation mold 100 of the curved touch screen 200 includes an upper mold 110 and a lower mold 120, and the upper mold 110 and the lower mold 120 are buckled together to enclose and form a cover plate 220 for accommodating the touch sensor sheet 210 and for encapsulating and forming the cover plate 220 outside the touch sensor sheet 210. The mold cavity 130 of the curved cover plate 220 includes a first sub-cavity 131 extending straightly for forming a flat plate portion 221 and at least one second sub-cavity 132 connected to the first sub-cavity 131 and extending in a curved shape or extending obliquely relative to the first sub-cavity 131 for forming a bent plate portion 222. The upper mold 110 is provided with an injection hole 111 connected to the first sub-cavity 131 or the second sub-cavity 132, and the lower mold 120 is provided with a plurality of first positioning posts 121 extending into the first sub-cavity 131 for inserting and positioning a touch sensor sheet 210.

[0052] The plastic encapsulation mold 100 of the curved touch screen 200 provided in this embodiment can be used to produce the curved touch screen 200 by directly plastic encapsulating the curved cover plate 220 outside the touch sensor sheet 210, thereby eliminating the subsequent assembly process of the curved cover plate 220 and the touch sensor sheet 210, and effectively solving the problem that the curved cover plate 220 and the touch sensor sheet 210 in the irregular curved touch screen 200 are difficult to assemble; and the curved cover plate 220 is plastic encapsulated by the plastic encapsulation mold 100, which has the advantages of being easy to process, having a high processing yield, and being conducive to mass production. Specifically, in this embodiment, the cavity 130 of the plastic encapsulation mold 100 is designed to include a first sub-cavity 131 extending straightly and at least one second sub-cavity 132 connected to the first sub-cavity 131 and extending in a curved shape or extending obliquely relative to the first sub-cavity 131. In this way, through the optimized design of the first sub-cavity 131 and the second sub-cavity 132, it is convenient to form a curved cover plate 220 with various irregular curved surface shapes by plastic encapsulation, effectively solving the bottleneck problem that the irregular curved touch screen 200 cannot be mass-produced, improving the production efficiency of the irregular curved touch screen 200, reducing the production cost of the irregular curved touch screen 200, and helping to meet the different needs of users for the irregular curved touch screen 200. In addition, in this embodiment, a positioning column assembly extending into the first sub-cavity 131 is provided on the lower mold 120 to position the touch sensor sheet 210. In this way, the touch sensor sheet 210 can be accurately placed and positioned in the cavity 130, and the touch sensor sheet 210 will not shift during the plastic packaging molding process, thereby helping to ensure the production yield of the curved touch screen 200.

[0053] Specifically, in this embodiment, the curved cover plate 220 is formed by resin molding. The resin has the advantage of being easy to mold and can meet the touch and display function requirements of the curved touch screen 200 .

[0054] Preferably, the lower mold 120 is further provided with an ejection mechanism 140 for ejecting the curved touch screen 200 from the cavity 130. In the specific production process, when the curved touch screen 200 is injection molded and cooled, the injection molding machine pushes the ejection mechanism 140 to move, thereby ejecting the curved touch screen 200.

[0055] Preferably, the lower mold 120 includes a lower mold plate 1201, a lower die block 1202 spaced above the lower mold plate 1201, and two support blocks 1203 connected between the lower mold plate 1201 and the lower die block 1202, and the bottom ends of the lower die block 1202 are respectively supported on the two support blocks 1203. The lower die block 1202 cooperates with the upper mold 110 to enclose the cavity 130. The ejection mechanism 140 is disposed between the lower mold plate 1201 and the lower die block 1202 and between the two support blocks 1203.

[0056] Preferably, in this embodiment, the two support blocks 1203 and the lower template 1201 are an integrally formed structure, that is, the two support blocks 1203 and the lower template 1201 are manufactured and formed as one piece; of course, in specific applications, the two support blocks 1203 and the lower template 1201 can also be designed as a split molding structure, that is, the two support blocks 1203 and the lower template 1201 are manufactured and formed separately and then assembled together.

[0057] Preferably, the ejection mechanism 140 includes an ejection base plate 141, an ejection panel 142, a plurality of ejector pins 143 disposed at intervals, and a plurality of guide rods 144 disposed at intervals. The ejection base plate 141 is pressed against the top surface of the lower mold plate 121 facing the lower mold block 1202, and the ejection panel 142 is pressed against the top surface of the ejection base plate 141 facing the lower mold block 1202. One end of each ejector pin 143 and one end of each guide rod 144 are fixed to the ejection panel 142, and the other end of each ejector pin 143 can be lifted and lowered and penetrated into the mold cavity 130, and the other end of each guide rod 144 is penetrated on the upper mold 100 and distributed on the periphery of the mold cavity 130. The ejector pin 143 is used to eject the curved touch screen 200 from the mold cavity 130 after the curved touch screen 200 is injection molded and cooled, and the guide rod 144 is used to guide the lifting and lowering of the ejection mechanism 140.

[0058] Preferably, a slot 123 is further provided in the mold cavity 130 for inserting and positioning a flexible circuit board 212 (FPC) at the end of the touch sensor sheet 210. The touch sensor sheet 210 includes a touch sensor sheet body 211 and a flexible circuit board 212 fixed to the touch sensor sheet body 211 and located at one end of the touch sensor sheet body 211. The flexible circuit board 212 is convexly arranged on one side of the touch sensor sheet body 211. Here, by providing the slot 123, on the one hand, the flexible circuit board 212 can be positioned, and on the other hand, the flexible circuit board 212 can be prevented from being encapsulated in the curved cover plate 220.

[0059] Preferably, the second sub-cavity 132 is provided with one, and the second sub-cavity 132 is obliquely arranged on one side of the first sub-cavity 131, and the lower mold 120 is also provided with a plurality of second positioning posts 124 extending into the second sub-cavity 132 for inserting and positioning another touch sensor sheet 210. The angle between the second sub-cavity 132 and the first sub-cavity 131 can be designed to correspond to the specific product shape of the curved touch screen 200. The plastic encapsulation mold 100 of the curved touch screen 200 provided in this embodiment is suitable for molding a curved cover plate 220 having a flat plate portion 221 and a curved plate portion 222, and finally manufacturing a curved touch screen 200 having two touch sensor sheets 210 and two touch display windows.

[0060] Preferably, the mold cavity 130 further includes an arc-shaped transition sub-cavity 133 disposed between the first sub-cavity 131 and the second sub-cavity 132 and extending in an arc shape. The provision of the arc-shaped transition sub-cavity 133 can prevent the curved touch screen 200 produced from being too sharp at the corner, which is beneficial to improving the appearance of the product and the production yield of the product. The curved cover plate 220 produced by this embodiment is composed of two flat plates disposed at an angle and an arc plate bent and connected between the two flat plates, and both flat plates have touch display areas that can be touched and displayed.

[0061] Preferably, two relatively inclined bosses 122 are provided on the side of the lower mold 120 facing the upper mold 110, each first positioning column 121 is convexly provided on one boss 122, each second positioning column 124 is convexly provided on the other boss 122, and a concave cavity 112 is provided on the side of the upper mold 110 facing the lower mold 120, and the concave cavity 112 covers the two bosses 122 and cooperates with the bosses 122 to enclose the molding cavity 130. The arrangement of the bosses 122 is conducive to enabling the molding cavity 130 to mold a curved cover plate 220 with a larger bending span.

[0062] Preferably, the number of the first positioning columns 121 is four, and the four first positioning columns 121 are distributed in a rectangular shape. Of course, in specific applications, the number and distribution of the first positioning columns 121 are not limited thereto.

[0063] Preferably, the number of the second positioning posts 124 is four, and the four second positioning posts 124 are distributed in a rectangular shape. Of course, in specific applications, the number and distribution of the second positioning posts 124 are not limited thereto.

[0064] Furthermore, the present embodiment also provides a method for manufacturing the curved touch screen 200, which uses the above-mentioned plastic encapsulation mold 100 of the curved touch screen 200 to encapsulate the touch sensor sheet 210 of the curved touch screen 200 to form a curved cover plate 220 having a flat plate portion 221 and at least one bent plate portion 222 bent or folded relative to the flat plate portion 221;

[0065] The plastic sealing molding method of the curved cover plate 220 is as follows:

[0066] The touch sensor sheet 210 is positioned on the lower mold 120 by cooperating with the positioning posts (the positioning posts in this embodiment include the first positioning posts 121 and the second positioning posts 124);

[0067] The upper mold 110 is covered on the lower mold 120;

[0068] The molten resin is injected into the cavity 130 from the injection hole 111 , so that the molten resin is solidified in the cavity 130 to form the curved cover plate 220 that is plastic-sealed outside the touch sensor sheet 210 .

[0069] The manufacturing method of the curved touch screen 200 provided in this embodiment completes the manufacturing of the curved cover plate 220 and the fixing of the curved cover plate 220 and the touch sensor sheet 210 in the plastic encapsulation mold 100 of the curved touch screen 200, that is, the curved cover plate 220 is directly plastic encapsulated on the touch sensor sheet 210, eliminating the subsequent assembly process of the curved cover plate 220 and the touch sensor sheet 210, and effectively solves the problem that the curved cover plate 220 and the touch sensor sheet 210 in the irregular curved touch screen 200 are difficult to assemble; and the curved cover plate 220 is plastic encapsulated by the plastic encapsulation mold 100, which has the advantages of being easy, having a high processing yield, and being conducive to mass production. The manufacturing method of the curved touch screen 200 provided in this embodiment is used to manufacture the irregular curved touch screen 200, which has the significant effect of reducing processes, reducing material consumption, reducing production costs, and improving production efficiency.

[0070] Preferably, the manufacturing method of the curved touch screen 200 provided in this embodiment further includes: pressing and fixing the touch sensor sheet body 211 and the flexible circuit board 212 together before placing and positioning the touch sensor sheet 210 on the lower mold 120 .

[0071] In this embodiment, the advantages of the resin mold industry and the touch screen industry are innovatively combined to develop a new manufacturing process for the curved touch screen 200. The touch sensor sheet 210 is directly positioned in the resin mold, and then the advantage of the resin being easy to mold is used to directly mold the curved cover plate 220 of the touch screen in the resin mold, which effectively solves the bottleneck that the irregular curved touch screen 200 cannot be mass-produced, improves the production efficiency of the irregular curved touch screen 200, and reduces the production cost of the irregular curved touch screen 200.

[0072] The plastic encapsulation mold 100 of the curved touch screen 200 and the manufacturing method of the curved touch screen 200 provided in this embodiment can be applied to the production and manufacturing of touch screens of terminal touch display devices such as vehicle-mounted intelligent touch display systems, smart phones, and tablet computers, and are conducive to the manufacture of curved touch screens 200 of various shapes to meet users' needs for different curved touch screens 200.

[0073] Embodiment 2:

[0074] like Figure 10-16 As shown, the encapsulation mold 100 of the curved touch screen 200 and the manufacturing method of the curved touch screen 200 provided in this embodiment are different from those in the first embodiment in that the second sub-cavity 132 is arranged differently, which is specifically reflected in that: the same as the first embodiment, in this embodiment, there is only one second sub-cavity 132; however, different from the first embodiment, in this embodiment, no second positioning column 124 is arranged in the second sub-cavity 132. The encapsulation mold 100 of the curved touch screen 200 provided in this embodiment is suitable for molding a curved cover plate 220 having a flat plate portion 221 and a curved plate portion 222, and finally manufacturing a curved touch screen 200 having a touch sensor sheet 210 and a touch display window.

[0075] Preferably, the second sub-cavity 132 is curved or inclined at one side of the first sub-cavity 131. The curved cover plate 220 produced by this embodiment is composed of a flat plate and a curved plate curvedly connected to one side of the flat plate or a flat plate obliquely connected to one side of the flat plate, and only one flat plate is provided with a touch display area capable of touch and display.

[0076] Preferably, the lower mold 120 is also provided with a plurality of protrusions 125 extending into the second subcavity 132 for forming a plurality of through holes 223 in the bent plate portion 222. The number, shape and location of the protrusions 125 can be optimized and designed according to actual products of different curved touch screens 200.

[0077] In this embodiment, since there is only one touch sensor sheet 210 , the touch sensor sheet 210 is positioned on the lower mold 120 by cooperating with the first positioning pillar 121 .

[0078] Preferably, in this embodiment, the two support blocks 1203 and the lower template 1201 are designed as a split molding structure, that is, the two support blocks 1203 and the lower template 1201 are manufactured and molded separately and then assembled together; of course, in specific applications, the two support blocks 1203 and the lower template 1201 can also be designed as an integral molding structure, that is, the two support blocks 1203 and the lower template 1201 are manufactured and molded as one piece.

[0079] In addition to the above differences, other configurations of the plastic encapsulation mold 100 of the curved touch screen 200 and the manufacturing method of the curved touch screen 200 provided in this embodiment can be optimized and designed with reference to the first embodiment, and will not be described in detail here.

[0080] Of course, in the case where there is only one second sub-cavity 132, the arrangement of the second sub-cavity 132 is not limited to the arrangement schemes of the first and second embodiments.

[0081] Embodiment three:

[0082] like Figure 17-23 As shown, the encapsulation mold 100 of the curved touch screen 200 and the manufacturing method of the curved touch screen 200 provided in this embodiment are different from those in the first and second embodiments in that the second sub-cavity 132 is arranged differently, which is specifically reflected in that: in the first and second embodiments, only one second sub-cavity 132 is provided; while in this embodiment, at least two second sub-cavities 132 are provided, and each second sub-cavity 132 is arranged on at least two sides of the first sub-cavity 131 in a curved shape or in a form inclined relative to the first sub-cavity 131, and at least two second sub-cavities 132 have opposite bending directions or inclined directions. The encapsulation mold 100 of the curved touch screen 200 provided in this embodiment is suitable for molding a curved cover plate 220 having a flat plate portion 221 and at least two curved plate portions 222, and the molded curved cover plate 220 has two curved plate portions 222 with opposite bending directions.

[0083] Preferably, the first sub-cavity 131 is rectangular, and four second sub-cavities 132 are provided, and the four second sub-cavities 132 are defined as a first side sub-cavity 1321, a second side sub-cavity 1322, a third side sub-cavity 1323 and a fourth side sub-cavity 1324, wherein the first side sub-cavity 1321 and the second side sub-cavity 1322 are respectively arranged on two opposite sides of the first sub-cavity 131, and the third side sub-cavity 1323 and the fourth side sub-cavity 1324 are arranged on two opposite sides of the first sub-cavity 131, the first side sub-cavity 1321 and the second side sub-cavity 1322. Specifically, the third side sub-cavity 1323 is bent or inclined along the side edge on which the first side sub-cavity 1321, the first sub-cavity 131 and the second side sub-cavity 1322 are located on the same side, and the fourth side sub-cavity 1324 is bent or inclined along the side edge on which the first side sub-cavity 1321, the first sub-cavity 131 and the second side sub-cavity 1322 are located on the same side and away from the third side sub-cavity 1323, that is, the third side sub-cavity 1323 and the fourth side sub-cavity 1324 are both directly connected to the first side sub-cavity 131, the first side sub-cavity 1321 and the second side sub-cavity 1322 at the same time.

[0084] Preferably, in this embodiment, the first side sub-cavity 1321, the second side sub-cavity 1322, the third side sub-cavity 1323 and the fourth side sub-cavity 1324 all extend in a curved shape, and the bending direction of the first side sub-cavity 1321 is opposite to the bending direction of the second side sub-cavity 1322, and the bending direction of the third side sub-cavity 1323 is opposite to the bending direction of the fourth side sub-cavity 1324. The curved cover plate 220 produced by this embodiment is composed of a flat plate and four curved plates, and the bending directions of the four curved plates are opposite to each other. Of course, in specific applications, the arrangement of the first side sub-cavity 1321, the second side sub-cavity 1322, the third side sub-cavity 1323 and the fourth side sub-cavity 1324 is not limited to this.

[0085] In this embodiment, no positioning column for positioning the touch sensor sheet 210 is provided in each second sub-cavity 132, and the touch sensor sheet 210 is positioned on the lower mold 120 by cooperating with the first positioning column 121, which is suitable for manufacturing a curved touch screen 200 having a touch sensor sheet 210, a touch display window, and multiple curved surfaces. Of course, in specific applications, according to product design requirements, a positioning column for positioning the touch sensor sheet 210 can also be provided in at least one second sub-cavity 132.

[0086] Preferably, in this embodiment, the two support blocks 1203 and the lower template 1201 are designed as a split molding structure, that is, the two support blocks 1203 and the lower template 1201 are manufactured and molded separately and then assembled together; of course, in specific applications, the two support blocks 1203 and the lower template 1201 can also be designed as an integral molding structure, that is, the two support blocks 1203 and the lower template 1201 are manufactured and molded as one piece.

[0087] In addition to the above differences, other configurations of the plastic encapsulation mold 100 of the curved touch screen 200 and the manufacturing method of the curved touch screen 200 provided in this embodiment can be optimized and designed with reference to the first embodiment, and will not be described in detail here.

[0088] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A method for manufacturing a curved touch screen, characterized in that: The curved touch screen plastic encapsulation mold is used to encapsulate the touch sensor sheet of the curved touch screen to form a curved cover plate having a flat plate portion extending straightly and at least one curved plate portion extending in a curved shape or extending obliquely relative to the flat plate portion. The plastic encapsulation mold of the curved touch screen comprises an upper mold and a lower mold, the upper mold and the lower mold are buckled together to form a cavity for accommodating the touch sensor sheet and for plastic encapsulating the curved cover plate outside the touch sensor sheet, the cavity comprises a first sub-cavity extending straightly for forming the flat plate portion and at least one second sub-cavity connected to the first sub-cavity and extending in a curved shape or extending obliquely relative to the first sub-cavity for forming the bent plate portion, the upper mold is provided with an injection hole connected to the first sub-cavity or the second sub-cavity, the lower mold is provided with a plurality of first positioning posts extending into the first sub-cavity for inserting and positioning the touch sensor sheet, and the cavity is also concavely provided with a card slot for inserting and positioning the flexible circuit board at the end of the touch sensor sheet; The plastic sealing molding method of the curved cover plate is: Pressing and fixing the touch sensor sheet body and the flexible circuit board together; Positioning the touch sensor sheet on the lower mold by cooperating with the first positioning column; Putting the upper mold cover on the lower mold; The molten resin is injected into the cavity from the injection hole, so that the molten resin is solidified in the cavity to form the curved cover plate which is plastic-sealed outside the touch sensor sheet.

2. The method for manufacturing a curved touch screen according to claim 1, wherein: The lower mold is also provided with an ejection mechanism for ejecting the curved touch screen from the mold cavity.

3. The method for manufacturing a curved touch screen according to claim 1 or 2, characterized in that: The second sub-cavity is provided with one, and the second sub-cavity is obliquely arranged on one side of the first sub-cavity. The lower mold is also provided with a plurality of second positioning posts extending into the second sub-cavity for inserting and positioning another touch sensor sheet.

4. The method for manufacturing a curved touch screen according to claim 3, wherein: The mold cavity further includes an arc-shaped transition sub-cavity which is arranged between the first sub-cavity and the second sub-cavity and extends in an arc shape.

5. The method for manufacturing a curved touch screen according to claim 3, wherein: The lower mold is provided with two relatively inclined bosses on the side facing the upper mold, each of the first positioning columns is protruded on one of the bosses, and each of the second positioning columns is protruded on the other of the bosses. The upper mold is provided with a concave cavity on the side facing the lower mold, and the concave cavity covers the two bosses and cooperates with the bosses to form the cavity.

6. The method for manufacturing a curved touch screen according to claim 1 or 2, characterized in that: The second sub-cavity is provided with one, and the second sub-cavity is curved or inclined on one side of the first sub-cavity.

7. The method for manufacturing a curved touch screen according to claim 6, wherein: The lower mold is also provided with a plurality of protrusions extending into the second sub-cavity for forming a plurality of through holes in the bent plate portion.

8. The method for manufacturing a curved touch screen according to claim 1 or 2, characterized in that: There are at least two second sub-cavities, each of which is curved or inclined relative to the first sub-cavity and is arranged on at least two sides of the first sub-cavity, and at least two of the second sub-cavities have opposite bending directions or inclined directions.

9. The method for manufacturing a curved touch screen according to claim 8, wherein: The first sub-cavity is rectangular, and there are four second sub-cavities, which are defined as a first side sub-cavity, a second side sub-cavity, a third side sub-cavity and a fourth side sub-cavity, wherein the first side sub-cavity and the second side sub-cavity are respectively arranged on two opposite sides of the first sub-cavity, and the third side sub-cavity and the fourth side sub-cavity are arranged on two opposite sides of the first sub-cavity, the first side sub-cavity and the second side sub-cavity.

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