Automatic cutting device for touch screen liquid crystal glass

Abstract

The present application relates to the technical field of liquid crystal glass cutting, and particularly relates to a touch screen liquid crystal glass automatic cutting device; the device comprises a device frame and a bottom plate fixedly installed on the device frame, a laser cutting mechanism is arranged on the bottom plate; a limiting mechanism is further arranged on the bottom plate; the present application comprises a bearing table, a backing plate, a sealing frame and an optical cover plate to form a closed station integrated with air pressure pressing and automatic separation function, so that the fixing, cutting and separation processes of the liquid crystal glass can be sequentially completed continuously and automatically in the single station, thereby significantly simplifying the operation process, reducing the positioning error and potential damage risk caused by the transfer of the workpiece between different stations, and improving the consistency and overall efficiency of the machining.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid crystal glass cutting, in particular to a touch screen liquid crystal glass automatic cutting device. BACKGROUND

[0002] In the field of modern display device manufacturing, the touch screen liquid crystal glass is not a single material glass substrate, but a precise multi-layer composite structure composed of various functional films including upper and lower glass substrates, polarizing sheets, optical adhesive films and touch sensing layers. In order to adapt to the size specifications of different terminal products, the large-area original substrate must be cut and divided, which is the cutting process. The purpose of cutting is to obtain the predetermined size and to prepare for the subsequent circuit conduction or special-shaped assembly. The current mainstream cutting process uses laser processing equipment, which uses the invisible cutting technology of forming a modified layer by focusing laser beam inside the material. This technology precisely controls the laser focus inside the glass instead of the surface, thereby forming a continuous and deep modified track in the glass body. After cutting, external mechanical stress or manual force is needed to make the liquid crystal glass split into independent units along the modified track.

[0003] However, there are the following problems in the current laser cutting process of liquid crystal glass. First, when laser acts on the multi-layer structure of liquid crystal glass, the high-temperature and high-pressure gas generated instantaneously is easy to cause the gasification and expansion of the interlayer polymer material, thereby causing the separation of the polarizing sheet and the optical adhesive film to form a bulge defect. Although the traditional mechanical pressing plate can apply pressure to suppress the bulge, the physical contact will block the laser path, causing laser energy attenuation, focal point drift and thermal damage of the pressing plate itself. At the same time, the hard contact method also has the risk of scratching the precision surface. Second, in the separation link after laser cutting, the traditional thimble lifting or vacuum chuck pulling applies local non-uniform stress, which is easy to cause the crack propagation path to deviate from the preset laser modification layer, causing edge collapse, hidden crack or interlayer misalignment, etc. quality problems, which seriously restricts the cutting yield and product strength.

[0004] Therefore, the problems of interlayer bulge, processing interference and poor separation quality of multi-layer liquid crystal glass in laser cutting are technical problems that need to be solved by those skilled in the art. SUMMARY

[0005] In view of the above problems, the present application provides a touch screen liquid crystal glass automatic cutting device to solve the above-mentioned technical problems.

[0006] In order to achieve the above purpose, the present application provides the following technical scheme: a touch screen liquid crystal glass automatic cutting device, comprising a device frame and a bottom plate fixedly installed thereon, a laser cutting mechanism is arranged on the bottom plate; a limiting mechanism is also arranged on the bottom plate.

[0007] The limiting mechanism comprises a bearing table arranged on the upper end of the bottom plate, a square groove is arranged on the lower end of the bearing table, a backing plate is arranged on the upper end of the bearing table, a sealing frame is arranged on the upper end of the backing plate, an optical cover plate is arranged on the upper end of the sealing frame, a first connector is arranged on the upper end of the sealing frame, a separation part is arranged on the bearing table, and a lifting part is arranged on the bottom plate.

[0008] The separation part comprises a cutting groove arranged on the backing plate, a rubber film is arranged in the cutting groove, and air holes are arranged on the bearing table and communicated with the square groove and the cutting groove, a second connector is arranged on the lower end of the bottom plate and communicated with the square groove.

[0009] In the closed space formed by the sealing frame, the optical cover plate and the backing plate, a uniform downward pressure is formed by injecting gas through the first connector to globally constrain the liquid crystal glass; after cutting, gas is injected below the rubber film through the second connector, the square groove and the air holes to drive the rubber film to generate a uniform upward deformation force in the cutting groove, so as to separate the liquid crystal glass along the cutting track.

[0010] As a preferred solution, a fixed plate is fixedly arranged on the upper end of the bottom plate, a through hole is arranged on the fixed plate and communicated with the square groove and the second connector, the bearing table is fixedly arranged on the upper end of the fixed plate, and a material blocking frame is fixedly arranged on the upper end of the fixed plate and located outside the bearing table.

[0011] As a preferred solution, the laser cutting mechanism comprises a moving frame fixedly arranged on the upper end of the bottom plate, a laser cutting head is arranged on the moving frame, and the moving frame is used to drive the laser cutting head to move forward and backward, left and right, and up and down.

[0012] As a preferred solution, the lifting part comprises a corner cylinder fixedly arranged on the lower end of the bottom plate, a connecting seat is fixedly arranged on the extension segment of the corner cylinder and penetrates through the bottom plate, and the connecting seat is fixedly connected with the sealing frame.

[0013] As a preferred solution, the upper end of the material blocking frame is lower than the lowest point of the laser cutting head and higher than the upper end surface of the optical cover plate when the optical cover plate is tightly sealed with the bearing table.

[0014] As a preferred solution, a sealing ring is arranged on the lower end of the sealing frame, and the sealing ring is tightly pressed with the bearing table to form a seal when the sealing frame is closed.

[0015] As a preferred solution, the optical cover plate is made of a material with high transmittance for the wavelength used by the laser cutting head.

[0016] As a preferred solution, the corner cylinder is located on the right side of the bearing table.

[0017] As a preferred solution, the light beam used by the laser cutting head is a Bessel light beam.

[0018] The one or more technical solutions in the embodiments of the present application have at least one of the following technical effects: first, the present application forms a sealed station integrating gas pressure pressing and automatic separation function by the bearing table, the backing plate, the sealing frame and the optical cover plate, so that the fixing, cutting and separation processes of the liquid crystal glass can be sequentially completed continuously and automatically in the single station, thereby significantly simplifying the operation process, reducing the positioning error and potential damage risk of the liquid crystal glass during the transfer between different stations, and improving the consistency and overall efficiency of the processing.

[0019] Second, the present application injects gas into the sealed space formed by the sealing frame, the optical cover plate and the backing plate through the first joint, so that uniform gas pressure can be formed on the upper surface of the liquid crystal glass, and the pressure can implement global and flexible downward constraint on the liquid crystal glass in a non-contact manner. This manner not only completely avoids the scratches or indentations caused by the direct contact of the traditional mechanical hard pressing plate, but also effectively resists and inhibits the upward impact force generated by the local gasification and expansion of the liquid crystal glass during laser cutting, thereby preventing the interlayer separation or bulging defects of the multi-layer liquid crystal glass structure.

[0020] Third, the present application introduces gas into the square groove through the second joint, and transmits the gas to the lower side of the rubber film in the cutting groove of the backing plate through the uniform air holes on the bearing table, so that the gas pressure drives the rubber film to produce overall and synchronous elastic deformation. This deformation is converted into uniform upward lifting force acting on the entire bottom surface of the liquid crystal glass, which guides the liquid crystal glass to break along the internal modification track formed by laser cutting, realizes smooth separation with good synchronization without local stress concentration and edge cracking, and perfectly preserves the original quality of the cutting section.

[0021] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and those skilled in the art can also obtain other drawings according to the provided drawings without creative labor.

[0023] Figure 1 It is a schematic view of the three-dimensional structure of the present application.

[0024] Figure 2 It is a schematic view of the structure of the limiting mechanism of the present application.

[0025] Figure 3 It is a partial structure sectional view of the separation part of the present application.

[0026] Figure 4 is an enlarged view of the structure at A in Figure 3

[0027] Figure 5 is a structural schematic view between the rubber film and the cutting groove of the present application.

[0028] Figure 6 is an enlarged view of the structure at B in Figure 5

[0029] Reference signs: 10, equipment rack; 11, bottom plate; 12, laser cutting mechanism; 120, moving frame; 121, laser cutting head; 13, fixed plate; 14, material blocking frame; 2, limiting mechanism; 20, bearing table; 21, cushion plate; 22, sealing frame; 220, sealing ring; 23, optical cover plate; 24, No. 1 connector; 3, separation part; 30, cutting groove; 31, rubber film; 32, air hole; 33, No. 2 connector; 4, lifting part; 40, corner air cylinder; 41, connecting seat. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, a lot of specific details are set forth in order to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the concept of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0031] As shown in Figure 1 , a kind of touch screen liquid crystal glass automatic cutting device, including equipment rack 10 and fixedly installed on its bottom plate 11, bottom plate 11 is provided with laser cutting mechanism 12;Bottom plate 11 still be provided with limiting mechanism 2.

[0032] As shown in Figure 1 , Figure 2 , Figure 3 And Figure 5 Limiting mechanism 2 includes bearing table 20 arranged on the upper end of bottom plate 11, the lower end of bearing table 20 is provided with square groove, cushion plate 21 is installed on the upper end of bearing table 20, sealing frame 22 is placed above cushion plate 21, optical cover plate 23 is sealingly installed on the upper end of sealing frame 22, one-way connector 24 is communicated on sealing frame 22, separation part 3 is provided on the bearing table 20, lifting part 4 is provided on the bottom plate 11.

[0033] As shown in Figure 3 , Figure 4 , Figure 5 And Figure 6 ​​As shown, the separation part 3 includes a cutting groove 30 opened on the pad plate 21, and a rubber film 31 is installed in the cutting groove 30. The bearing table 20 is uniformly provided with air holes 32 communicated with the square groove and the cutting groove 30. The bottom plate 11 is provided at the lower end with a second joint 33 communicated with the square groove.

[0034] As shown, Figures 1 to 6 In specific operation, the external mechanical arm first places the to-be-cut liquid crystal glass flat on the upper surface of the pad plate 21 and ensures that it is located in the area enclosed by the sealing frame 22. Then, the lifting part 4 is started to make the sealing frame 22 and the optical cover plate 23 installed thereon descend as a whole until the lower edge of the sealing frame 22 is tightly sealed with the surface of the pad plate 21 to form a sealed processing chamber with the optical cover plate 23 as the window.

[0035] At this time, clean compressed gas is introduced into the sealed chamber through the first joint 24 to establish and maintain a stable gas pressure environment higher than the external atmospheric pressure in the chamber. The uniform gas pressure tightly presses the liquid crystal glass on the pad plate 21, thereby effectively inhibiting the interlayer bulging that may occur in the subsequent laser processing.

[0036] The laser cutting mechanism 12 fixed on the equipment frame 10 is then started, and the laser beam emitted thereby vertically penetrates the optical cover plate 23 and focuses on the inside of the pressed liquid crystal glass to perform scanning cutting. After the cutting operation is completed, the gas in the chamber is discharged to the normal pressure through the first joint 24 to release the upper constraint on the liquid crystal glass.

[0037] Subsequently, gas is introduced into the square groove below the bearing table 20 through the second joint 33. The gas is introduced into the cutting groove 30 of the pad plate 21 through the uniformly distributed air holes 32 of the bearing table 20 and acts on the lower surface of the rubber film 31. Under the uniform gas pressure, the rubber film 31 produces controllable and overall upward deformation, thereby stably and synchronously jacking the cut liquid crystal glass attached thereto to make the liquid crystal glass neatly separate into independent units along the track formed by laser cutting. Finally, the lifting part 4 lifts the sealing frame 22 and the optical cover plate 23 to open the processing chamber, and the external mechanical arm can take out the separated liquid crystal glass workpiece.

[0038] As shown, Figure 1 , Figure 2 and Figure 3 The lifting part 4 includes a corner cylinder 40 fixedly installed at the lower end of the bottom plate 11. The extension segment of the corner cylinder 40 is fixedly installed with a connecting seat 41 after penetrating through the bottom plate 11. The connecting seat 41 is fixedly connected with the sealing frame 22.

[0039] As shown, Figure 3 The sealing frame 22 is provided at the lower end with a sealing ring 220. When the sealing frame 22 is closed, the sealing ring 220 is tightly pressed with the bearing table 20 to form a seal.

[0040] As Figure 1 and Figure 2 shown, the corner cylinder 40 is located on the right side of the bearing table 20 to avoid interference with the moving path of the laser cutting mechanism 12.

[0041] As Figures 1 to 5 shown, in specific work, the corner cylinder 40 on the right side of the bearing table 20 is started, and the telescopic section is extended upwards to drive the top connecting seat 41 and the entire sealing frame 22 fixed thereto to vertically rise, thereby opening the processing chamber; as the telescopic section of the corner cylinder 40 continues to extend, it drives the connecting seat 41 and the entire sealing frame 22 fixed thereto to rotate ninety degrees away from the bearing table 20, so as to place the glass.

[0042] Then, the liquid crystal glass is placed on the predetermined position of the cushion plate 21, the telescopic section of the corner cylinder 40 is retracted, and the sealing frame 22 is first rotated ninety degrees to move above the bearing table 20, and then smoothly descends; when the sealing ring 220 installed at the lower end of the sealing frame 22 contacts the upper surface of the bearing table 20, the corner cylinder 40 continuously applies a closing force, so that the sealing ring 220 produces uniform elastic deformation, thereby forming a reliable air seal between the sealing frame 22 and the bearing table 20.

[0043] At this time, the upper surface of the cushion plate 21, the inner side wall of the sealing frame 22 and the lower surface of the optical cover plate 23 together form a closed space; after the sealing is established, clean gas is filled into the closed space through the first connector 24, and the internal pressure is increased. The gas pressure uniformly acts on the entire volume between the optical cover plate 23 and the cushion plate 21, and because the optical cover plate 23 is fixed and has high pressure-bearing capacity, the reaction force and the supporting force of the cushion plate 21 together act to tightly constrain the liquid crystal glass placed on the cushion plate 21 on the surface of the cushion plate 21. The uniform gas pressure of the entire domain effectively prevents any displacement or interlayer separation of the liquid crystal glass in the subsequent laser cutting.

[0044] After the cutting and separation operation is completed, the pressure is first released through the first connector 24 to release the gas pressure constraint on the liquid crystal glass, and then the corner cylinder 40 drives the sealing frame 22 to rise, the sealing ring 220 is separated from the bearing table 20, and the chamber is opened to take out the liquid crystal glass.

[0045] As Figure 1 and Figure 2 shown, the laser cutting mechanism 12 includes a moving frame 120 fixedly installed on the upper end of the bottom plate 11, and a laser cutting head 121 is installed on the moving frame 120. The moving frame 120 is used to drive the laser cutting head 121 to move forward and backward, left and right, and up and down.

[0046] As Figure 2 and Figure 3As shown, the bottom plate 11 is fixedly installed with a fixed plate 13 at the upper end, the fixed plate 13 is provided with a through hole communicated with the square groove and the second joint 33, the bearing table 20 is fixedly installed on the upper end of the fixed plate 13, and the upper end of the fixed plate 13 is fixedly installed with a material blocking frame 14 located outside the bearing table 20.

[0047] As shown in Figure 1 and Figure 2 As shown, the upper end of the material blocking frame 14 is lower than the lowest point of the laser cutting head 121 and higher than the upper end surface when the optical cover plate 23 is tightly attached to the bearing table 20.

[0048] As shown in Figures 1 to 6 As shown, the optical cover plate 23 is made of a material having high transmittance to the wavelength used by the laser cutting head 121, and the high transmittance ensures that the laser energy penetrates the optical cover plate 23 maximally and without loss, directly ensuring the cutting efficiency, protecting the optical cover plate 23 itself and maintaining the processing stability; specifically, the high transmittance can significantly improve the energy utilization efficiency, so that the beam intensity fully acts on the liquid crystal glass rather than being absorbed and lost by the optical cover plate 23, while fundamentally avoiding the heat accumulation of the optical cover plate 23 due to the absorption of laser energy, preventing its thermal deformation, damage or performance degradation, thereby maintaining the integrity of the sealed chamber and the reliability of long-term use, and ensuring the original quality and focusing state of the beam, avoiding energy scattering or focal point drift caused by poor transmission, and ultimately ensuring the accuracy of the cutting track and the consistent high quality of the cutting edge.

[0049] As shown in Figure 1 and Figure 2 As shown, the laser cutting head 121 uses a Bessel beam, and the super-long focal depth formed by the non-diffractive property of the Bessel beam can penetrate the full thickness of the liquid crystal glass at one time, accurately focusing the energy inside the material rather than on the surface, avoiding surface thermal damage and melting, further avoiding micro-cracks and interlayer bulging caused by cutting, and obtaining a high-strength cutting edge with no edge collapse and vertical smoothness, meeting the quality requirements of liquid crystal glass precision machining.

[0050] Specifically, after completing the air pressure constraint on the liquid crystal glass, the moving frame 120 drives the laser cutting head 121 to move to the starting position of processing, the Bessel beam emitted by the laser cutting head 121 penetrates the optical cover plate 23 with high transmittance and focuses inside the compressed liquid crystal glass; the moving frame 120 drives the laser cutting head 121 to move forward and backward, left and right according to the preset path, and adjusts the focus up and down as necessary, so that the Bessel beam forms a complete cutting modification track inside the liquid crystal glass, and the extremely small debris generated in the process is constrained in the sealed chamber.

[0051] After the cutting is completed, the chamber gas pressure is released through the first joint 24, and then the second joint 33 is used to ventilate the rubber film 31 through the through hole and square groove on the fixed plate 13, the air hole 32, and the rubber film 31 is uniformly deformed to lift the liquid crystal glass as a whole, so that the liquid crystal glass is separated into independent products and peripheral waste along the modified trajectory.

[0052] Subsequently, the corner cylinder 40 drives the sealing frame 22 to rise and open the chamber, and the external mechanical arm can first take out the multiple independent products on the cushion plate 21, and then take away the peripheral large waste in the same way. After the products and waste are taken away, a small amount of fine glass debris generated by laser cutting is left on the exposed surface of the cushion plate 21. At this time, the operator uses an external blowing tool such as an air gun to blow high-speed airflow from the outside of the equipment to the working area of the cushion plate 21, so as to blow away the remaining debris. Since the material blocking frame 14 is fixedly installed on the fixed plate 13 and surrounds the outer circle of the bearing table 20, and the height is higher than the upper surface of the optical cover plate 23 in the sealing state, but lower than the lowest movement point of the laser cutting head 121, these swept debris will be effectively blocked and collected in the area range of the fixed plate 13 surrounded by the material blocking frame 14, and will not splash to other parts of the equipment. For the debris collected in the material blocking frame 14, the subsequent cleaning can be completed by directly cleaning the inside area of the material blocking frame 14.

[0053] In the description of the present application, it should be understood that the orientation words such as "front, rear, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and in the absence of the opposite description, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0054] In addition, the terms "first", "second", "one", "two" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", "one", "two" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0055] In the description of the present application, it also needs to be explained that, unless explicitly specified and limited, the terms "set", "connected", "mounted", "connected" should be understood broadly, for example, can be fixedly connected, can also be detachably connected, or integrally connected; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0056] The embodiments of the specific implementation are the preferred embodiments of the present application, not limited by the protection scope of the present application, so that equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An automatic cutting device for touch screen LCD glass, comprising a frame and a base plate fixedly mounted thereon, wherein a laser cutting mechanism is provided on the base plate; characterized in that: A limit mechanism is also provided on the base plate; The limiting mechanism includes a support platform set on the upper part of the base plate, a square groove opened at the lower end of the support platform, a pad installed on the upper part of the support platform, a sealing frame sealed above the pad, an optical cover plate sealed on the upper end of the sealing frame, a No. 1 connector connected to the sealing frame, a separation part set on the support platform, and a lifting part set on the base plate. The separation section includes a cutting groove on the pad plate, a rubber membrane installed in the cutting groove, and ventilation holes that communicate with the square groove and the cutting groove are evenly distributed on the support platform. A No. 2 connector that communicates with the square groove is installed at the lower end of the bottom plate. Within the sealed space formed by the sealing frame, optical cover plate, and pad, gas is injected through connector No. 1 to form a uniform downward pressure to constrain the liquid crystal glass over the entire area. After cutting, gas is injected under the rubber membrane through connector No. 2, square groove, and vent hole to drive the rubber membrane to generate a uniform upward deformation force in the cutting groove, causing the liquid crystal glass to separate along the cutting trajectory.

2. The automatic cutting device for touch screen LCD glass according to claim 1, characterized in that: A fixing plate is fixedly installed on the upper end of the base plate. The fixing plate has through holes that communicate with the square groove and the No. 2 connector. The support platform is fixedly installed on the upper end of the fixing plate. A baffle frame located on the outer ring of the support platform is fixedly installed on the upper end of the fixing plate.

3. The automatic cutting device for touch screen LCD glass according to claim 2, characterized in that: The laser cutting mechanism includes a movable frame fixedly installed on the upper part of the base plate, on which a laser cutting head is mounted. The movable frame is used to drive the laser cutting head to move back and forth, left and right, and up and down.

4. The automatic cutting device for touch screen LCD glass according to claim 1, characterized in that: The lifting unit includes a corner cylinder fixedly installed at the lower end of the base plate. The telescopic section of the corner cylinder moves through the base plate and is fixedly installed with a connecting seat. The connecting seat is fixedly connected to the sealing frame.

5. The automatic cutting device for touch screen LCD glass according to claim 3, characterized in that: The upper end of the baffle frame is lower than the lowest point of the laser cutting head, but higher than the upper surface of the optical cover plate when it is sealed and fitted with the support platform.

6. The automatic cutting device for touch screen LCD glass according to claim 1, characterized in that: A sealing ring is installed at the lower end of the sealing frame. When the sealing frame is closed, the sealing ring is pressed against the support platform to form a seal.

7. The automatic cutting device for touch screen LCD glass according to claim 3, characterized in that: The optical cover is made of a material with high transmittance to the wavelengths used by the laser cutting head.

8. The automatic cutting device for touch screen LCD glass according to claim 4, characterized in that: The corner cylinder is located on the right side of the support platform.

9. The automatic cutting device for touch screen LCD glass according to claim 3, characterized in that: The laser cutting head uses a Bessel beam.

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