Accurate temperature control rework heating platform for 86-inch touch screen

Abstract

The utility model discloses a kind of precision temperature control rework heating platforms for 86-inch touch screen, including platform base, heat insulation layer is equipped on platform base, main heating layer is equipped on heat insulation layer, microporous ceramic heat bed is equipped on main heating layer, vacuum passage is equipped in microporous ceramic heat bed, vacuum adsorption hole corresponding with vacuum passage is equipped on microporous ceramic heat bed, main heating layer is aluminum heating plate, silicon rubber heating wire in the shape of "back" word multiple loop distribution is embedded in aluminum heating plate, five K-type thermocouples are in the center of microporous ceramic heat bed and four corners, lifting guardrail is provided around platform base.The utility model has the beneficial effects that:the heating equipment of the utility model has excellent heating uniformity, can effectively prevent screen deformation, temperature control is accurate, reliable operation is safe, and has strong speciality.

Description

Technical Field

[0001] This utility model relates to the field of touch screen manufacturing and repair technology, and in particular to a precision temperature control rework heating platform for large-size touch screens, specifically an 86-inch touch screen. Background Technology

[0002] 86-inch touchscreens are widely used in the manufacturing of large interactive smart whiteboards, electronic whiteboards, and other similar devices. During their production and assembly, the touchscreen often needs to be bonded to the cover glass or display module. If problems such as bubbles, foreign objects, misalignment, or malfunction occur, rework is required. This involves heating the bonding components to soften the optical adhesive, and then safely separating the touchscreen.

[0003] Existing technologies face the following main challenges when reworking large-size TP: 1. Poor heating uniformity: Ordinary heating tables or hot air guns are unable to provide a uniform heat field for an 86-inch screen that is nearly 2 meters long, which can easily lead to localized overheating (damaging the polarizer and liquid crystal layer) or insufficient softening of the adhesive in some areas. Uneven heating can also generate thermal stress inside the glass, increasing the risk of cracking.

[0004] 2. Risk of screen deformation and breakage: When an 86-inch glass screen is heated in one direction, uneven thermal expansion can easily cause micro-bending deformation. This deformation will turn into stress concentration points during the separation process, causing the glass to break directly and resulting in huge economic losses.

[0005] 3. Low operational efficiency and safety: Manual heating and separation are time-consuming, and operators have to face high-temperature surfaces and potential glass breakage risks for extended periods, resulting in high labor intensity and questionable safety.

[0006] 4. Lack of specialized tools: Most existing heating platforms on the market are general-purpose or designed for small sizes, and their structure, temperature control accuracy and load-bearing capacity cannot meet the rework requirements of 86-inch TP.

[0007] Therefore, there is an urgent need in this field for a dedicated rework heating platform that can achieve large-area uniform and precise heating, effectively support the screen and prevent deformation, while improving operational safety and efficiency. Utility Model Content

[0008] To address the aforementioned shortcomings, the present invention aims to overcome the deficiencies of existing technologies and provide a rework heating platform specifically designed for 86-inch touchscreens. This platform enables rapid and uniform heating and precise temperature control, and possesses excellent planar support capabilities, thereby significantly improving the success rate and efficiency of large-size touchscreen rework. This invention achieves this through the following technical solution: A precision temperature-controlled rework heating platform for 86-inch touch screens, comprising a platform base, wherein a heat insulation layer is arranged on the platform base, a main heating layer is arranged on the heat insulation layer, a microporous ceramic heat equalizing layer is arranged on the main heating layer, a vacuum channel is arranged in the microporous ceramic heat equalizing layer, vacuum adsorption holes corresponding to the vacuum channel are arranged on the microporous ceramic heat equalizing layer, the main heating layer is an aluminum heating plate, silicone heating wires distributed in a "square-frame" multi-loop shape are embedded inside the aluminum heating plate, a total of five K-type thermocoupes are arranged at the center and four corners in the microporous ceramic heat equalizing layer, and lifting guardrails are circumferentially arranged around the platform base.

[0009] Further, the heat insulation layer is made of high-temperature glass wool or aerogel felt.

[0010] Further, the aluminum heating plate is a 6061 aluminum alloy plate with a thickness of 15 mm, wire grooves are carved inside the plate, the silicone heating wires with a total power of 4.5 kW are embedded and symmetrically distributed in a "square-frame" shape.

[0011] Further, the lifting guardrail comprises L-shaped fixing plates arranged at the four corners of the platform base, hydraulic or electric telescopic rods are arranged on both side plates of each L-shaped fixing plate, a rail is arranged at the top of each telescopic rod, and the rails on the front-rear side and the left-right side of the platform base are symmetrically arranged.

[0012] Further, the ceramic used for the microporous ceramic heat equalizing layer is alumina ceramic, the thickness is 10 mm, and the flatness is ≤ 0.1 mm / m 2 , the vacuum adsorption holes with a diameter of φ0.5 mm and a hole spacing of 20 mm are processed on the surface, and a far-infrared coating is sprayed on the surface of the microporous ceramic heat equalizing layer.

[0013] Further, the K-type thermocouples are connected with a PID temperature controller and an over-temperature protection device.

[0014] Further, the platform base is composed of a rigid metal frame, an emergency stop button is arranged on one side of the platform base, and horizontally adjustable supporting feet are arranged at the four corners of the bottom of the platform base.

[0015] The beneficial effects of the present utility model are: 1. Excellent heating uniformity: through the triple heat equalizing design of "aluminum heating plate + square-frame shaped heating circuit + microporous ceramic heat equalizing plate", the problem of heating uniformity for 86-inch ultra-large area is effectively solved, local overheating or insufficient heating is avoided, and ideal conditions are created for uniform softening of OCA adhesive.

[0016] 2. Effectively prevents screen deformation: The microporous ceramic plate has extremely high flatness and thermal stability. Combined with the vacuum adsorption function, it can firmly adsorb the 86-inch TP onto an absolutely flat reference surface, effectively suppressing the micro-bending of the glass caused by its own weight and uneven heating, and fundamentally reducing the risk of breakage during separation.

[0017] 3. Precise and reliable temperature control: Multiple temperature sensors combined with a PID intelligent temperature control algorithm can compensate for heat loss at the edge of the platform in real time, ensuring a high degree of temperature consistency throughout the working area and meeting the softening temperature requirements of various OCA adhesives.

[0018] 4. Safe and efficient operation: The operator only needs to place the TP on the platform and start the vacuum adsorption and heating program. There is no need to repeatedly move the heat source, the waiting time is short, and there is safety protection throughout the process, which significantly improves rework efficiency and operational safety.

[0019] 5. Highly specialized: This platform is optimized for the physical characteristics and rework process requirements of 86-inch TP from structural design and material selection to control system, filling a market gap. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention.

[0021] In the diagram: 1-Platform base, 2-Insulation layer, 3-Main heating layer, 4-Microporous ceramic heat dissipation layer, 5-Lifting guardrail, 6-L-shaped fixing plate, 7-Telescopic pole, 8-Guardrail, 9-Supporting feet, 10-Emergency stop button. Detailed Implementation

[0022] 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.

[0023] Combination Figure 1 Shown: A precise temperature-controlled rework heating platform for 86-inch touch screens, comprising a platform base 1. The platform base 1 is constructed from a rigid metal frame to ensure the overall structure is stable and free from deformation. In this embodiment, the platform base 1 is welded from 80*80 mm square steel pipes, has a dimension of 2200mm * 1300mm, and its surface is subjected to rust prevention treatment. A heat insulation layer 2 is arranged on the platform base 1, and the heat insulation layer 2 is made of high-temperature glass wool or aerogel felt, which is used to reduce heat transfer to the base, improve thermal efficiency and protect the bottom structure; a main heating layer 3 is arranged on the heat insulation layer 2. The main heating layer 3 adopts a 15mm thick 6061 aluminum alloy plate, with wire grooves carved inside, and silica gel heating wires with a total power of 4.5kW are embedded, which are symmetrically distributed in a "circular" shape. By adopting a large-area, high-thermal-conductivity aluminum heating plate with silica gel heating wires embedded inside and distributed in multiple loops in a "circular" shape, it can ensure that heat diffuses uniformly from the center to the surroundings.

[0024] A microporous ceramic uniform heating layer 4 is arranged on the main heating layer 3, a vacuum channel is arranged in the microporous ceramic uniform heating layer 4, the vacuum channel can be arranged transversely or longitudinally in the microporous ceramic uniform heating layer 4, vacuum suction holes corresponding to the vacuum channel are arranged on the microporous ceramic uniform heating layer 4, and the touch screen is fixed through the vacuum suction holes. The ceramic material used for the microporous ceramic uniform heating layer 4 is alumina ceramic, with a thickness of 10mm and a flatness ≤ 0.1mm / m 2 , the surface is processed with φ0.5mm vacuum suction holes with a hole spacing of 20mm, and the surface of the microporous ceramic uniform heating layer 4 is sprayed with a far-infrared coating. The far-infrared coating has the characteristics of high temperature resistance and high emissivity, and can transfer heat to TP more uniformly in the form of radiation, so as to improve heating efficiency and reduce hot spots; The ceramic material has extremely high flatness and thermal stability, and micro vacuum suction holes are densely distributed on the surface of the ceramic material, which are connected with the built-in vacuum channel, and are used for adsorbing and fixing TP during heating to prevent it from moving and deforming due to uneven heating. 5-point K-type thermocouple temperature measurement is adopted in the microporous ceramic uniform heating layer 4, that is, there are five K-type thermocouples at the center and four corners, the K-type thermocouples are connected to a PID temperature controller, and signals are input to the PID temperature controller. The PID temperature controller receives signals from temperature sensors and performs closed-loop PID control on the main heating layer, so that the surface temperature of the platform is controlled within ±3°C of the set value. The on-off of the solid-state relay is controlled by the PID temperature controller, so as to realize precise temperature control within the range of 40°C-120°C. The K-type thermocouple temperature measurement is also connected with an over-temperature protection device. The over-temperature protection device generally adopts temperature overload protection devices such as a thermal switch and an over-temperature protector, which can be independent of the main temperature control system and automatically cut off the power supply when the temperature rises abnormally.

[0025] The platform base 1 is surrounded by lifting guardrails 5. The lifting guardrails 5 include L-shaped fixing plates 6 at the four corners of the platform base 1. Hydraulic or electric telescopic rods 7 are provided on both sides of the L-shaped fixing plates 6. The top of the telescopic rods 7 is provided with railings 8. The railings 8 on the front, back and left and right sides of the platform base 1 are symmetrically arranged. The lifting of the railings 8 is controlled by the lifting of the telescopic rods 7. Depending on the lifting of the telescopic rods 7, the position that needs to be protected can be selectively protected.

[0026] An emergency stop button 10 is provided on one side of the platform base 1 for cutting off the power and shutting down the equipment in an emergency. Adjustable horizontal support feet 9 are provided at the four corners of the bottom of the platform base 1. The support feet 9 are generally electric telescopic rods 7 or hydraulic telescopic rods 7 to facilitate horizontal adjustment. All equipment controls, such as the heating operation, guardrail lifting operation, sensors and PID devices, and over-temperature protection devices, are controlled by connecting to a computer control terminal.

[0027] Working principle: Place the 86-inch TP (transfer plate) to be reworked on the surface of the microporous ceramic plate, raise the guardrail for protection, and then activate vacuum adsorption to fix the TP through the vacuum adsorption holes. Set the target temperature (e.g., 80℃) using the PID temperature controller, and energize the silicone heating wire to heat the platform evenly to the set temperature within 15-20 minutes and maintain it. At this point, the OCA adhesive will have fully softened, and the operator can safely separate the TP using manual tools or an auxiliary robotic arm. If the temperature is too high, the over-temperature protection device will activate. The core innovation of this invention lies in addressing the two major challenges of "uniform heating" and "deformation prevention" posed by the specific size of "86 inches." It proposes a composite solution consisting of a "heating layer with a specific layout" and a "microporous ceramic heat-spreading adsorption plate." This solution is not simply a matter of stacking components; rather, through synergistic effects, it achieves a technical effect greater than the sum of its parts (1+1>2), effectively ensuring a high success rate for rework of large-size, high-value process panels.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A precision temperature-controlled rework heating platform for an 86-inch touchscreen, characterized in that: Comprising a platform base (1), wherein a heat insulating layer (2) is arranged on the platform base (1), a main heating layer (3) is arranged on the heat insulating layer (2), a microporous ceramic uniform heating layer (4) is arranged on the main heating layer (3), a vacuum channel is arranged in the microporous ceramic uniform heating layer (4), vacuum adsorption holes corresponding to the vacuum channel are arranged on the microporous ceramic uniform heating layer (4), the main heating layer (3) is an aluminum heating plate, silica gel heating wires distributed in a zigzag multi-loop shape are embedded inside the aluminum heating plate, a total of five K-type thermocouples are arranged at the center and four corners in the microporous ceramic uniform heating layer (4), and lifting guardrails (5) are arranged around the platform base (1).

2. The precision temperature control rework heating platform for an 86-inch touchscreen according to claim 1, characterized in that: The heat insulating layer (2) is made of high-temperature glass wool or aerogel felt.

3. The precision temperature control rework heating platform for an 86-inch touchscreen according to claim 1, characterized in that: The aluminum heating plate is a 6061 aluminum alloy plate with a thickness of 15 mm, wire grooves are carved inside the aluminum heating plate, the silica gel heating wires with a total power of 4.5 kW are embedded and symmetrically distributed in a zigzag shape.

4. The precision temperature control rework heating platform for an 86-inch touchscreen according to claim 1, characterized in that: The lifting guardrail (5) comprises L-shaped fixing plates (6) arranged at four corner positions of the platform base (1), hydraulic or electric telescopic rods (7) are arranged on two side plates of each L-shaped fixing plate (6), a railing (8) is arranged at the top of each telescopic rod (7), and the railings (8) on the front-rear side and the left-right side of the platform base (1) are symmetrically arranged.

5. A precision temperature-controlled rework heating platform for an 86-inch touchscreen according to claim 1, characterized in that: The microporous ceramic heat spreader layer (4) is made of alumina ceramic, with a thickness of 10 mm and a flatness of ≤0.1 mm / m. 2 The surface is processed with φ0.5mm vacuum adsorption holes with a hole spacing of 20mm, and the surface of the microporous ceramic heat spreader (4) is sprayed with a far-infrared coating.

6. The precision temperature control rework heating platform for an 86-inch touchscreen according to claim 1, characterized in that: The K-type thermocouple is connected with a PID temperature controller and an over-temperature protection device.

7. A precision temperature-controlled rework heating platform for an 86-inch touchscreen according to claim 1, characterized in that: The platform base (1) is composed of a rigid metal frame, an emergency stop button (10) is arranged on one side surface of the platform base (1), and supporting feet (9) capable of adjusting level are arranged at four corner positions of the bottom of the platform base (1).

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