A hot-pressing and laminating device for liquid crystal screen production and processing

Abstract

This utility model discloses a hot-press bonding device for LCD screen production and processing, relating to the field of LCD screen processing technology. The hot-press bonding device includes a fixed frame, with a pressing mechanism above the fixed frame for pressing the LCD screen. The pressing mechanism includes a support assembly, comprising a support tube fixedly installed inside the fixed frame, a support plate inserted above the support tube, a support spring sleeved below the support plate, and a support frame fixedly installed below the support plate. An electric push rod drives a transmission column to move, and the transmission column transmits force to a movable frame through a buffer spring. The movable frame slides smoothly on the fixed frame with the aid of a linear bearing, causing protective plates to approach and clamp the LCD screen from both sides. The elastic characteristics of the buffer spring ensure that the clamping force of the protective plate on the LCD screen remains uniform, avoiding differences in clamping force caused by uneven force during manual operation.

Description

Technical Field

[0001] This utility model relates to the field of LCD screen processing technology, specifically to a hot-press bonding equipment for LCD screen production and processing. Background Technology

[0002] LCD screen bonding relies on various functional adhesives (OCA, ACF, UV adhesives, etc.). These adhesives need to be cured under "specific temperature + pressure". The core function of the equipment is to provide a precise "thermal pressing environment" to ensure that the adhesive layer achieves the best curing effect and avoids delamination and separation in the later stage.

[0003] The existing utility model patent with publication number CN220438702U discloses a hot-press bonding device for LCD screen production and processing, including a main support frame and a motor. The lower end of the main support frame is fixed to a base, and the main support frame has a hollow internal structure. A downward pressure connecting plate is provided at the front end of the main support frame, a pressing plate is provided below the downward pressure connecting plate, and a hot-pressing plate is provided at the bottom end of the pressing plate. A telescopic rod is symmetrically arranged in a slot in the middle of the lower end of the base of the main support frame. This hot-press bonding device for LCD screen production and processing is equipped with a support plate and a downward pressure spring telescopic rod. The downward movement speed of the downward pressure connecting plate is controlled by adjusting the rotation speed of the rotating threaded rod. Simultaneously, the downward pressure spring telescopic rod prevents excessive force on the LCD screen surface upon contact with the hot-pressing plate, which could cause the LCD screen to crack. The telescopic rod at the bottom end of the support plate further prevents excessive force on the lower surface of the LCD screen from causing cracking.

[0004] The aforementioned hot-press bonding equipment requires manual pulling of the clamping strip to hold the LCD screen, and the clamping force is adjusted by "manually releasing the clamping strip". On the one hand, uneven manual operation force will lead to inconsistent clamping force of the clamping strip on the LCD screen, which will cause the LCD screen to be misaligned and ultimately cause the hot-press bonding to be offset. At the same time, the equipment is equipped with a spring buffer. The speed of the rotating threaded rod is controlled by manually adjusting the motor switch to achieve the downward movement speed of the pressing connecting plate. If the downward speed is too fast, even with the downward spring telescopic column buffer, the instantaneous impact force may exceed the LCD screen's tolerance threshold and cause it to break. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a hot-press bonding device for LCD screen production and processing, which solves the problems of positioning misalignment and damage to LCD screens caused by instantaneous impact.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A hot-press bonding device for LCD screen production and processing includes a fixed frame, and a pressing mechanism is provided above the fixed frame for pressing the LCD screen. The pressing mechanism includes: The support assembly includes a support tube fixedly installed inside a fixed frame, a support plate inserted above the support tube, a support spring sleeved below the support plate, a support frame fixedly installed below the support plate, a rubber pad fixedly installed inside the fixed frame, a heating plate fixedly installed above the support plate, linear bearings fixedly installed on both sides of the fixed frame, a movable frame movably installed on one side of the linear bearings, a buffer spring inserted through the center of the movable frame, a transmission column fitted inside the movable frame, a limit ring fixedly installed on the front side of the movable frame, an electric push rod connected to one end of the transmission column, and a protective plate fixedly installed on one side of the movable frame. The pressure assembly, positioned above the mounting bracket, provides the pressure required for pressing.

[0007] Preferably, the pressing assembly includes a limiting frame fixedly installed above the fixing frame, a mounting frame fixedly installed on the top of the limiting frame, a pressing cylinder fixedly installed below the mounting frame, a transmission plate fixedly installed at the bottom of the pressing cylinder, a sleeve fixedly installed below the transmission plate, a connecting spring provided inside the sleeve, a guide post inserted inside the sleeve, and a pressure plate fixedly installed at the bottom of the guide post.

[0008] Preferably, the support plate and the support tube are slidably connected, the top end of the support spring contacts the bottom surface of the support plate, and the bottom end contacts the disc-shaped protrusion at the top of the support tube. The bottom of the support frame is provided with a planar structure with an area smaller than that of the rubber pad. The rubber pad is located directly below the support frame. A vertical baffle for positioning is provided on one side of the heating plate.

[0009] Preferably, the movable frame is slidably connected to the fixed frame via a linear bearing, the movable frame has a pipe structure at its center, the buffer spring is located inside the pipe structure at the center of the movable frame, the front end of the buffer spring contacts the end of the transmission column, the limiting ring is connected to the movable frame via a threaded structure, the rear end of the electric push rod is fixedly connected to the fixed frame, and the movable end is fixedly connected to the front end of the transmission column.

[0010] Preferably, the limiting frame is symmetrically installed at the front and rear ends of the fixed frame, the pressing cylinder is fixedly connected to the limiting frame through the mounting frame, the top of the transmission plate is fixedly connected to the movable end of the pressing cylinder, the guide column and the sleeve form a sliding connection, and the top end of the sleeve and the transmission plate form a sliding connection.

[0011] Preferably, the bottom end of the sleeve is provided with an annular protrusion that fits into the guide post, the bottom end of the connecting spring contacts the guide post, the top end contacts the bottom surface of the transmission plate, and the pressure plate is connected to the transmission plate through the guide post and the sleeve.

[0012] Beneficial effects This utility model provides a hot-press bonding device for LCD screen manufacturing. Compared with the prior art, it has the following advantages: (1) The hot press bonding equipment for LCD screen production and processing firstly provides an initial placement benchmark for the LCD screen by setting a vertical baffle on one side of the heating plate to ensure that the LCD screen will not be significantly tilted when placed; then, the electric push rod drives the transmission column to move, and the transmission column transmits the force to the movable frame through the buffer spring. The movable frame slides smoothly on the fixed frame with the help of linear bearings, driving the protective plate to approach and clamp the LCD screen from both sides. The elastic characteristics of the buffer spring can keep the clamping force of the protective plate on the LCD screen uniform, avoiding the difference in clamping force caused by uneven force during manual operation; at the same time, the limiting ring is connected to the movable frame through a threaded structure, and fixes the position of the movable frame after the protective plate clamps the LCD screen to prevent the movable frame from shifting during the pressing process, thereby ensuring that the LCD screen is always in the center bonding area of ​​the heating plate, and finally avoiding the positioning offset during hot press bonding.

[0013] (2) The hot-press bonding equipment for LCD screen production and processing uses a multi-level elastic buffer system to offset instantaneous impact force and protect the LCD screen. When the pressing cylinder drives the transmission plate to move down, the transmission plate drives the sleeve to move down synchronously. The connecting spring inside the sleeve pushes the guide column, and the guide column drives the pressure plate to move towards the LCD screen. When the pressure plate just touches the LCD screen, the connecting spring will undergo elastic deformation due to compression, converting the instantaneous downward impact force generated by the pressing cylinder into the elastic force of the spring, reducing the impact speed and force of the pressure plate on the LCD screen, and realizing the first level of buffer. At the same time, after the LCD screen is subjected to the pressure of the pressure plate, it pushes the support plate. The support plate slides in the support tube and compresses the support spring. The elastic deformation of the support spring further absorbs the pressure from above, forming the second level of buffer, preventing the instantaneous impact force from exceeding the LCD screen's tolerance threshold. In addition, when the bottom of the support frame contacts the rubber pad, the flexible material of the rubber pad can help absorb some of the remaining impact force, forming the third level of buffer. The combination of multiple buffer structures effectively prevents the LCD screen from being damaged by instantaneous impact force. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the support frame installation structure of this utility model; Figure 3 This is a schematic diagram of the electric actuator mounting structure of this utility model; Figure 4 This is a schematic diagram of the transmission plate mounting structure of this utility model; In the diagram: 1. Fixed frame; 2. Pressing mechanism; 21. Support assembly; 211. Support tube; 212. Support plate; 213. Support spring; 214. Support frame; 215. Rubber pad; 216. Heating plate; 217. Linear bearing; 218. Movable frame; 219. Buffer spring; 2110. Transmission column; 2111. Limiting ring; 2112. Electric push rod; 2113. Protective plate; 22. Pressing assembly; 221. Limiting frame; 222. Mounting frame; 223. Pressing cylinder; 224. Transmission plate; 225. Sleeve; 226. Connecting spring; 227. Guide column; 228. Pressure plate. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-4This utility model provides a technical solution: a hot-press bonding equipment for LCD screen production and processing includes a fixed frame 1, and a pressing mechanism 2 is provided above the fixed frame 1 for pressing the LCD screen. The pressing mechanism 2 includes: a support component 21, including a support tube 211 fixedly installed inside the fixed frame 1, a support plate 212 inserted above the support tube 211, a support spring 213 sleeved below the support plate 212, a support frame 214 fixedly installed below the support plate 212, a rubber pad 215 fixedly installed inside the fixed frame 1, a heating plate 216 fixedly installed above the support plate 212, linear bearings 217 fixedly installed on both sides of the fixed frame 1, a movable frame 218 movably installed on one side of the linear bearings 217, a buffer spring 219 inserted through the center of the movable frame 218, a transmission column 2110 fitted inside the movable frame 218, a limit ring 2111 fixedly installed on the front side of the movable frame 218, and one end of the transmission column 2110 connected to... The movable frame 218 is connected to an electric actuator 2112. A protective plate 2113 is fixedly installed on one side of the movable frame 218. The support plate 212 and the support tube 211 are slidably connected. The top end of the support spring 213 contacts the bottom surface of the support plate 212, and the bottom end contacts the disc-shaped protrusion on the top of the support tube 211. The bottom of the support frame 214 is provided with a planar structure with an area smaller than that of the rubber pad 215. The rubber pad 215 is located directly below the support frame 214. A vertical baffle for positioning is provided on one side of the heating plate 216. The movable frame 218 is slidably connected to the fixed frame 1 through a linear bearing 217. A pipe structure is provided in the center of the movable frame 218. A buffer spring 219 is located inside the pipe structure in the center of the movable frame 218. The front end of the buffer spring 219 contacts the end of the transmission column 2110. The limiting ring 2111 is connected to the movable frame 218 through a threaded structure. The rear end of the electric actuator 2112 is fixedly connected to the fixed frame 1, and the movable end is fixedly connected to the front end of the transmission column 2110.

[0017] Specifically, the support tube 211 can limit the position of the bottom end of the support spring 213 and limit the direction of movement of the support plate 212. The support frame 214 at the bottom of the support plate 212 limits the travel of the support plate 212. During the process of the support plate 212 moving downward under pressure, before the bottom of the support frame 214 contacts the rubber pad 215, the support spring 213 is deformed under pressure. After the bottom of the support frame 214 contacts the rubber pad 215, the support frame 214 can support the support plate 212, thereby providing support force for the LCD screen during the pressure holding process. The linear bearing 217 can reduce the friction between the movable frame 218 and the fixed frame 1 during the sliding process. The electric push rod 2112 drives the movable frame 218 to move to both sides to clamp the LCD screen and place the LCD screen in the center of the heating plate 216. The vertical baffle on one side of the heating plate 216 can easily limit the position of the LCD screen and heat the adhesive layer during the pressure holding process.

[0018] The pressing assembly 22, positioned above the fixed frame 1, provides the pressure required for pressing. The pressing assembly 22 includes a limiting frame 221 fixedly mounted above the fixed frame 1. A mounting bracket 222 is fixedly mounted on the top of the limiting frame 221. A pressing cylinder 223 is fixedly mounted below the mounting bracket 222. A transmission plate 224 is fixedly mounted at the bottom of the pressing cylinder 223. A sleeve 225 is fixedly mounted below the transmission plate 224. A connecting spring 226 is installed inside the sleeve 225. A guide post 227 is inserted inside the sleeve 225. A pressure plate 228 is fixedly mounted at the bottom of the guide post 227. The limiting frame 221... The cylinder 223 is symmetrically installed at the front and rear ends of the fixed frame 1. The cylinder 223 is fixedly connected to the limit frame 221 through the mounting frame 222. The top of the transmission plate 224 is fixedly connected to the movable end of the cylinder 223. The guide post 227 and the sleeve 225 are slidably connected. The top of the sleeve 225 is slidably connected to the transmission plate 224. The bottom end of the sleeve 225 is provided with an annular protrusion that fits into the guide post 227. The bottom end of the connecting spring 226 contacts the guide post 227 and the top end contacts the bottom surface of the transmission plate 224. The pressure plate 228 is connected to the transmission plate 224 through the guide post 227 and the sleeve 225.

[0019] Specifically, the limiting bracket 221 restricts the position of the mounting bracket 222, which facilitates the installation of the pressing cylinder 223. The pressing cylinder 223 drives the transmission plate 224 downwards, which in turn drives the sleeve 225, guide post 227, and pressure plate 228 downwards. This causes the pressure plate 228 to clamp the LCD screen between itself and the heating plate 216. The sleeve 225 and guide post 227 connect the pressure plate 228 to the transmission plate 224. When the pressure plate 228 contacts the LCD screen, the connecting spring 226 provides a buffering effect. Furthermore, any content not described in detail in this specification is prior art known to those skilled in the art.

[0020] During operation, the LCD screen is placed on the heating plate 216, and initial positioning is achieved using the vertical baffle on one side of the heating plate 216. Then, the electric push rod 2112 is activated, its movable end driving the transmission column 2110 to move. The transmission column 2110 pushes the buffer spring 219 within the central pipe structure of the movable frame 218. The buffer spring 219 transmits the force to the movable frame 218, which slides smoothly on the fixed frame 1 via the linear bearing 217. This, in turn, moves the protective plate 2113 towards the LCD screen. After the two protective plates 2113 clamp the LCD screen, the position of the movable frame 218 is fixed by the limiting ring 2111 threaded to it, ensuring stable clamping of the LCD screen. Next, the pressing cylinder 223 is activated. With the fixed support of the mounting frame 222 and the limiting frame 221, the movable end of the pressing cylinder 223 drives the transmission plate 224 downwards. The transmission plate 224 drives the lower sleeve 225 downwards simultaneously. The connecting spring 226 inside 25 pushes the guide post 227, and the guide post 227 drives the pressure plate 228 to move closer to the LCD screen. After the pressure plate 228 contacts the LCD screen, the downward pressure causes the LCD screen to push the support plate 212. The support plate 212 slides downward in the support tube 211 and compresses the support spring 213. At the same time, the support plate 212 drives the support frame 214 to move down until the bottom of the support frame 214 contacts the rubber pad 215 inside the fixed frame 1. At this time, the support plate 212 stops moving down, and the electric heating plate 216 starts heating, maintaining the pressed state until the adhesive material is cured. After the pressing is completed, the pressing cylinder 223 drives the transmission plate 224, sleeve 225, guide post 227 and pressure plate 228 to reset. The electric push rod 2112 drives the transmission post 2110 to reset. The buffer spring 219 pushes the movable frame 218 and protective plate 2113 to reset. The support spring 213 pushes the support plate 212 and electric heating plate 216 to reset. Finally, the LCD screen that has been glued is taken out.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hot-press bonding device for LCD screen manufacturing and processing, comprising a fixing frame (1), characterized in that: A pressing mechanism (2) is provided above the fixing frame (1) for pressing the LCD screen. The pressing mechanism (2) includes: The support assembly (21) includes a support tube (211) fixedly installed inside the fixing frame (1), a support plate (212) inserted above the support tube (211), a support spring (213) sleeved below the support plate (212), a support frame (214) fixedly installed below the support plate (212), a rubber pad (215) fixedly installed inside the fixing frame (1), an electric heating plate (216) fixedly installed above the support plate (212), and the two sides of the fixing frame (1) are fixed. A linear bearing (217) is installed, and a movable frame (218) is movably installed on one side of the linear bearing (217). A buffer spring (219) is inserted through the center of the movable frame (218). A transmission column (2110) is fitted inside the movable frame (218). A limit ring (2111) is fixedly installed on the front side of the movable frame (218). An electric push rod (2112) is connected to one end of the transmission column (2110). A protective plate (2113) is fixedly installed on one side of the movable frame (218). The pressure assembly (22) is positioned above the mounting bracket (1) to provide the pressure required for pressing.

2. The heat pressing and laminating device for liquid crystal screen production and processing according to claim 1, characterized in that: The pressing assembly (22) includes a limiting frame (221) fixedly installed above the fixing frame (1). A mounting frame (222) is fixedly installed on the top of the limiting frame (221). A pressing cylinder (223) is fixedly installed below the mounting frame (222). A transmission plate (224) is fixedly installed at the bottom of the pressing cylinder (223). A sleeve (225) is fixedly installed below the transmission plate (224). A connecting spring (226) is provided inside the sleeve (225). A guide post (227) is inserted inside the sleeve (225). A pressure plate (228) is fixedly installed at the bottom of the guide post (227).

3. The heat pressing and laminating device for liquid crystal screen production and processing according to claim 1, characterized in that: The support plate (212) and the support tube (211) are connected in a sliding manner. The top end of the support spring (213) is in contact with the bottom surface of the support plate (212), and the bottom end is in contact with the disc-shaped protrusion at the top of the support tube (211). The bottom of the support frame (214) is provided with a planar structure with an area smaller than that of the rubber pad (215). The rubber pad (215) is located directly below the support frame (214). A vertical baffle for positioning is provided on one side of the heating plate (216).

4. The heat pressing and laminating device for liquid crystal screen production and processing according to claim 1, characterized in that: The movable frame (218) is slidably connected to the fixed frame (1) via a linear bearing (217). A pipe structure is provided at the center of the movable frame (218). The buffer spring (219) is located inside the pipe structure at the center of the movable frame (218). The front end of the buffer spring (219) contacts the end of the transmission column (2110). The limiting ring (2111) is connected to the movable frame (218) via a threaded structure. The rear end of the electric push rod (2112) is fixedly connected to the fixed frame (1), and the movable end is fixedly connected to the front end of the transmission column (2110).

5. The heat pressing and laminating device for liquid crystal screen production and processing according to claim 2, characterized in that: The limiting frame (221) is symmetrically installed at the front and rear ends of the fixed frame (1). The pressing cylinder (223) is fixedly connected to the limiting frame (221) through the mounting frame (222). The top of the transmission plate (224) is fixedly connected to the movable end of the pressing cylinder (223). The guide column (227) and the sleeve (225) form a sliding connection. The top end of the sleeve (225) and the transmission plate (224) form a sliding connection.

6. The heat pressing and laminating device for liquid crystal screen production and processing according to claim 2, characterized in that: The sleeve (225) has an annular protrusion at the bottom end that fits into the guide post (227). The bottom end of the connecting spring (226) contacts the guide post (227), and the top end contacts the bottom surface of the transmission plate (224). The pressure plate (228) is connected to the transmission plate (224) through the guide post (227) and the sleeve (225).

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