Workbench for hot press and hot press

Abstract

The utility model relates to the technical field of hot presses, in particular to a workbench for a hot press and the hot press. The workbench comprises a workbench body, a positioning plate is arranged at the upper end of the workbench body, and the positioning plate is of a hollow structure; a positioning pin is arranged at the upper end of the positioning plate and is used for penetrating through a positioning hole of a thin and flexible base material; a plurality of adsorption holes are further formed in the upper end of the positioning plate, and the adsorption holes are communicated with an inner cavity of the positioning plate; the positioning plate is provided with a magnet in a matched mode, the magnet can magnetically attract an embedded part placed on the thin and flexible base material, the thin and flexible base material can be rapidly and stably positioned, deviation of the base material in the hot pressing process can be avoided, hot pressing of the base material is effectively protected, damage to a base material product in the hot pressing process is prevented, and the stability of hot pressing is improved. Therefore, the forming quality of products is improved. The hot press adopts the workbench.

Description

Technical Field

[0001] This utility model relates to the field of hot press technology, specifically to a workbench for a hot press and a hot press. Background Technology

[0002] Hot presses, as core equipment in the bonding process of thin and flexible substrates (such as the bonding process of thin-film solar cells), suffer from technical defects that have become a bottleneck restricting the manufacturing of high-precision devices. During the hot pressing process, due to the light weight of the thin and flexible substrate, accurate and stable positioning is crucial. However, existing hot presses cannot achieve stable positioning of the film, leading to air bubbles or deviations during hot pressing, thus affecting the molding quality of the product. Utility Model Content

[0003] To address the technical problem that existing hot presses cannot stably position films, this invention provides a worktable and hot press for a hot press. Through vacuum adsorption in conjunction with a magnet, thin and flexible substrates are quickly and stably positioned, preventing substrate displacement during hot pressing and effectively protecting the substrate from damage during the hot pressing process. This increases the stability of hot pressing and improves the molding quality of the product.

[0004] This utility model is achieved through the following technical solution:

[0005] In a first aspect, this utility model provides a workbench for a hot press, including a workbench body, a positioning plate provided at the upper end of the workbench body, the positioning plate having a hollow structure; a positioning pin provided at the upper end of the positioning plate, the positioning pin being used to pass through a positioning hole in a thin flexible substrate; a plurality of adsorption holes also provided at the upper end of the positioning plate, the adsorption holes communicating with the inner cavity of the positioning plate; the positioning plate being adapted with a magnet, the magnet being able to magnetically attract embedded parts placed on the thin flexible substrate.

[0006] The worktable for a hot press provided by this utility model has a positioning plate on the upper end of the worktable body. The positioning plate has a hollow structure and is equipped with positioning pins, adsorption holes and magnets. In use, the inner cavity of the positioning plate is connected to a negative pressure source. A thin and flexible substrate is laid on the positioning plate and the positioning pins are inserted into the positioning holes in the thin and flexible substrate to quickly position the thin and flexible substrate through the cooperation of the positioning pins and positioning holes. At the same time, the thin and flexible substrate is vacuum adsorbed through the adsorption holes of the positioning plate. Furthermore, the embedded parts placed on the thin and flexible substrate are magnetically attracted by the magnets to further stably adsorb the thin and flexible substrate onto the positioning plate.

[0007] Therefore, the worktable provided by this utility model can quickly and stably position thin and flexible substrates, avoid substrate displacement during hot pressing, effectively protect the substrate during hot pressing, prevent damage to the substrate product during hot pressing, increase the stability of hot pressing, and thus improve the molding quality of the product.

[0008] In an optional embodiment of this application, the positioning plate further includes a base plate, and the magnet is a plate-shaped material adapted to the base plate; wherein, after the base plate and the magnet are assembled, they can form a closed cavity, so that the positioning plate can perform negative pressure adsorption and magnetic attraction on the material placed on it.

[0009] In an optional embodiment of this application, the top of the base plate is provided with a plurality of interconnecting grooves in a crisscross pattern; the magnet is provided with a plurality of interconnecting holes, and the plurality of interconnecting holes are provided in a one-to-one correspondence with the adsorption holes, and each interconnecting hole is directly opposite the corresponding interconnecting groove, so as to ensure that the positioning plate can perform negative pressure adsorption.

[0010] In an optional embodiment of this application, a flexible plate is provided at the upper end of the magnet, and the adsorption hole is provided on the flexible plate so that the thin flexible substrate can be attached to the surface of the positioning plate, and the gap between the flexible plate and the thin flexible substrate is sealed by the deformation of the flexible plate, thereby improving the stability of negative pressure adsorption.

[0011] In an optional embodiment of this application, the worktable body is a rotatable worktable, which facilitates the replacement of thin and flexible substrates that need to be hot-pressed, thereby improving the hot-pressing efficiency.

[0012] Secondly, this utility model provides a hot press, comprising: the aforementioned worktable for the hot press; a heating assembly; and an actuation mechanism for controlling the operation of the heating assembly and driving the heating assembly to reciprocate toward the positioning plate.

[0013] The hot press provided by this utility model uses the above-mentioned worktable, which can quickly and stably position the thin and flexible substrate, avoid substrate displacement during hot pressing, effectively protect the substrate during hot pressing, prevent damage to the substrate product during hot pressing, increase the stability of hot pressing, and thus improve the molding quality of the product.

[0014] It should be noted that existing hot presses generally employ single-zone heating and global constant pressure control, leading to significant thermodynamic imbalances in the substrate during the hot pressing process. Furthermore, a single heating zone cannot compensate for edge heat loss. Although vacuum hot presses and pulse hot presses alleviate some bubble defects by reducing ambient air pressure or applying high-frequency pressure, they still cannot meet the requirements of current hot pressing processes.

[0015] In view of this, in an optional embodiment of this application, the heating component includes: a pressure plate, which is connected to the actuation mechanism; and multiple heating plates, all connected to the pressure plate, with a heating tube in the middle, to heat the thin flexible film and thin flexible substrate on the positioning plate in sections, thereby solving the problems of uneven heating, residual air bubbles, hot bonding failure and temperature compensation during the hot pressing process, so as to meet the requirements of the hot pressing process.

[0016] In an optional embodiment of this application, the heating plate includes an upper substrate and a lower substrate, and the heating tube is sandwiched between the upper substrate and the lower substrate to facilitate the arrangement of the heating plate.

[0017] In an optional embodiment of this application, the actuation mechanism includes: a mounting bracket; a thermostat mounted on the mounting bracket and electrically connected to the heating tube; multiple thermocouples, all electrically connected to the thermostat, for detecting the temperature of the corresponding heating plate; and a linear drive assembly for driving the pressure plate to move up and down, so as to ensure that the actuation mechanism can control the operation of the heating assembly and drive the heating assembly to reciprocate towards the positioning plate.

[0018] In an optional embodiment of this application, the linear drive component is a lead screw and slider mechanism driven by a motor, so as to accurately control the pressing stroke of the pressure plate.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0020] 1. The worktable for a hot press provided by this utility model has a positioning plate at the upper end of the worktable body. The positioning plate has a hollow structure and is equipped with positioning pins, adsorption holes, and magnets. In use, the inner cavity of the positioning plate is connected to a negative pressure source. A thin and flexible substrate is laid on the positioning plate, and the positioning pins are inserted into the positioning holes in the thin and flexible substrate. The thin and flexible substrate is quickly positioned by the cooperation of the positioning pins and positioning holes. At the same time, the thin and flexible substrate is vacuum adsorbed through the adsorption holes of the positioning plate. Furthermore, the embedded parts placed on the thin and flexible substrate are magnetically attracted by the magnets to further stably adsorb the thin and flexible substrate onto the positioning plate. This allows for rapid and stable positioning of the thin and flexible substrate, preventing substrate displacement during hot pressing, effectively protecting the substrate during hot pressing, preventing damage to the substrate product during hot pressing, increasing the stability of hot pressing, and thus improving the molding quality of the product.

[0021] 2. The hot press provided by this utility model uses the above-mentioned worktable, which can quickly and stably position the thin and flexible substrate, avoid the substrate from shifting during the hot pressing process, effectively protect the substrate during the hot pressing process, prevent damage to the substrate product during the hot pressing process, increase the stability of the hot pressing process, and thus improve the molding quality of the product.

[0022] 3. The hot press provided by this utility model has a heating component including a pressure plate and a heating plate. The pressure plate is connected to the actuation mechanism. Multiple heating plates are provided, each connected to the pressure plate, and a heating tube is provided in the middle. This allows for zoned heating of the thin flexible film and thin flexible substrate on the positioning plate, solving the problems of uneven heating, residual air bubbles, hot bonding failure, and temperature compensation in the hot pressing process, thus meeting the requirements of the hot pressing process.

[0023] 4. The hot press provided by this utility model has a pressure plate and an actuation mechanism that are connected by transmission. Multiple heating plates are provided and installed on the pressure plate to press the press through multi-point pressure loading in the partition of the large flat plate, which can ensure uniform pressing force and flat pressing surface. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] In the attached diagram:

[0026] Figure 1 This is a schematic diagram of the main structure of the hot press provided in an embodiment of this application;

[0027] Figure 2 A three-dimensional structural diagram of the positioning plate after adsorbing the bottom film according to an embodiment of this application;

[0028] Figure 3 This is a schematic diagram of the exploded structure of the positioning plate after it adsorbs the bottom film, as provided in the embodiments of this application.

[0029] Figure 4 This is an exploded structural diagram of the heating plate provided in an embodiment of this application;

[0030] Figure 5 This is a schematic diagram of the isometric structure of the main body of the hot press provided in an embodiment of this application.

[0031] 100 - Workbench body;

[0032] 200-Positioning plate, 210-Positioning pin, 220-Magnet, 221-Connecting hole, 230-Base plate, 231-Connecting groove, 240-Flexible plate, 241-Adsorption hole;

[0033] 300-Pressure plate;

[0034] 400 - Heating plate, 410 - Heating tube, 420 - Upper substrate, 430 - Lower substrate;

[0035] 500-Actuating mechanism, 510-Mounting bracket, 511-Guide sleeve, 520-Thermostat, 530-Thermocouple, 540-Linear drive assembly, 541-Drive motor, 542-Motor base, 543-Guide post, 550-Thermostatic cover;

[0036] 600-Thin and flexible substrate;

[0037] 700 - Embedded parts. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0040] It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0041] In the description of the embodiments of this application, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this application is usually placed in when in use, or the orientation or positional relationship that is commonly understood by those skilled in the art. It is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0042] In the description of this application, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] Example 1

[0044] Combination Figures 1-3 This embodiment provides a workbench for a hot press, including a workbench body 100. A positioning plate 200 is provided at the upper end of the workbench body 100. The positioning plate 200 has a hollow structure. A positioning pin 210 is provided at the upper end of the positioning plate 200. The positioning pin 210 is used to pass through the positioning hole of the thin flexible substrate 600. A plurality of adsorption holes 241 are also provided at the upper end of the positioning plate 200. The adsorption holes 241 communicate with the inner cavity of the positioning plate 200. The positioning plate 200 is adapted to a magnet 220. The magnet 220 can magnetically attract embedded parts 700 placed on the thin flexible substrate 600.

[0045] Continue to combine Figure 3 The positioning plate 200 also includes a base plate 230, and the magnet 220 is a plate-shaped material adapted to the base plate 230. After the base plate 230 and the magnet 220 are assembled, they can form a closed cavity, so that the positioning plate 200 can perform negative pressure adsorption and magnetic attraction on the material placed on it.

[0046] Specifically, the top of the base plate 230 is provided with a plurality of interconnecting grooves 231 arranged in a crisscross pattern; the magnet 220 is provided with a plurality of interconnecting holes 221, and the plurality of interconnecting holes 221 are provided in a one-to-one correspondence with the adsorption holes 241, and each interconnecting hole 221 is directly opposite the corresponding interconnecting groove 231, so as to ensure that the positioning plate 200 can perform negative pressure adsorption.

[0047] In this embodiment, a flexible plate 240 (such as a silicone plate) is provided at the upper end of the magnet 220, and the adsorption hole 241 is provided on the flexible plate 240 so that the thin flexible substrate 600 can be attached to the surface of the positioning plate 200, and the gap between the flexible plate 240 and the thin flexible substrate 600 is sealed by the deformation of the flexible plate 240, thereby improving the stability of negative pressure adsorption.

[0048] It is understood that the worktable body 100 is a rotatable worktable, which facilitates the replacement of the thin and flexible substrate 600 that needs to be hot-pressed, thereby improving the hot-pressing efficiency.

[0049] In summary, the workbench for the hot press provided in this embodiment has a positioning plate 200 on the upper end of the workbench body. The positioning plate 200 has a hollow structure and is provided with a positioning pin 210, an adsorption hole 241 and a magnet 220.

[0050] In use, the inner cavity of the positioning plate 200 is connected to a negative pressure source, and the thin flexible substrate 600 is laid on the positioning plate 200. The positioning pin 210 is inserted into the positioning hole in the thin flexible substrate 600 to quickly position the thin flexible substrate 600 through the cooperation of the positioning pin 210 and the positioning hole. At the same time, the thin flexible substrate 600 is vacuum adsorbed through the adsorption hole 241 of the positioning plate 200. Furthermore, the embedded part 700 placed on the thin flexible substrate 600 is magnetically attracted by the magnet 220 to further stably adsorb the thin flexible substrate 600 onto the positioning plate 200.

[0051] It should be noted that in this embodiment, the thin flexible substrate 600 is a thin-film solar cell, and its embedded component 700 is a CIGS chip. CIGS is a compound composed of four elements: copper (Cu), indium (In), gallium (Ga), and selenium (Se), and is typically equipped with a flexible substrate. This embodiment uses magnet 220 for adsorption, targeting CIGS cells on ferritic stainless steel substrates or duplex stainless steel substrates (possessing both austenitic and ferritic microstructures). Of course, the worktable provided in this embodiment can also be used for other thin flexible products that require thermosetting bonding.

[0052] In summary, the worktable provided in this embodiment can quickly and stably position the thin and flexible substrate 600, which can prevent the substrate from shifting during hot pressing, effectively protect the substrate during hot pressing, prevent damage to the substrate product during hot pressing, increase the stability of hot pressing, and thus improve the molding quality of the product.

[0053] Example 2

[0054] Combination Figure 1 and Figure 5 This embodiment provides a hot press, including: a worktable for a hot press as described in Embodiment 1; a heating assembly; and an actuation mechanism 500 for controlling the operation of the heating assembly and driving the heating assembly to reciprocate toward the positioning plate 200.

[0055] It should be noted that existing hot presses generally employ single-zone heating and global constant pressure control, leading to significant thermodynamic imbalances in the substrate during the hot pressing process. Furthermore, a single heating zone cannot compensate for edge heat loss. Although vacuum hot presses and pulse hot presses alleviate some bubble defects by reducing ambient air pressure or applying high-frequency pressure, they still cannot meet the requirements of current hot pressing processes.

[0056] Therefore, in this embodiment, the heating assembly includes: a pressure plate 300, which is connected to the actuation mechanism 500; and multiple heating plates 400 (four in this embodiment, the specific number depending on usage requirements), all connected to the pressure plate 300, with a heating tube 410 in the middle to provide zoned heating for the thin flexible film and thin flexible substrate 600 on the positioning plate 200. This also solves the problems of uneven heating, residual air bubbles, hot bonding failure, and temperature compensation during the hot pressing process, thus meeting the requirements of the hot pressing process. Generally, a buffer spring is provided between the pressure plate 300 and the heating plate 400 to provide cushioning during the hot pressing process.

[0057] It is understandable that the heating tube 410 can be distributed in various ways, such as S-shaped coiling or mosquito coil spiraling. The heating effect can be changed by different distribution forms of the heating tube 410.

[0058] Combination Figure 4 The heating plate 400 includes an upper substrate 420 and a lower substrate 430, and the heating tube 410 is sandwiched between the upper substrate 420 and the lower substrate 430 to facilitate the arrangement of the heating plate 400.

[0059] For CIGS batteries, the hot pressing station must withstand a high temperature of 200℃, and the heating plate 400 must be covered with Teflon (polytetrafluoroethylene) tape during use. When replacing the tape, no adhesive residue should be left on the surface of the heating plate 400.

[0060] Continue to combine Figure 5 The actuation mechanism 500 includes: a mounting bracket 510; a thermostat 520 mounted on the mounting bracket 510 and electrically connected to the heating tube 410; multiple thermocouples 530, all electrically connected to the thermostat 520, for detecting the temperature of the corresponding heating plate 400; and a linear drive assembly 540 for driving the pressure plate 300 to move up and down, so as to ensure that the actuation mechanism 500 can control the operation of the heating assembly and drive the heating assembly to reciprocate towards the positioning plate 200.

[0061] Specifically, in this embodiment, a heating source is mounted on the mounting bracket 510, a hot pressing chamber is provided around the heating source, a temperature control bracket is mounted on the hot pressing chamber 550, and a temperature controller 520 is installed inside the temperature control bracket. Simultaneously, one end of a thermocouple 530 is installed inside the heating plate 400. The temperature controller 520 can control the heating power of the corresponding heating tube 410 based on the data from the thermocouple 530. Therefore, the heating temperature in this embodiment is independently controllable, with a temperature control range of <200℃, and the temperature uniformity of the heating plate 400 is ±2℃. Furthermore, after hot pressing, the chip is firmly fixed to the front film without detachment, and the chip shows no abnormal deformation.

[0062] The linear drive assembly 540 can be an electric actuator, a pneumatic actuator, etc. In this embodiment, the linear drive assembly 540 is a motor-driven lead screw and slider mechanism to precisely control the downward stroke of the pressure plate 300. Specifically, a motor base 542 and a guide sleeve 511 are mounted on the mounting bracket 510, and the drive motor 541 is mounted on the motor base 542. A guide post 543 is vertically arranged on the pressure plate 300, and the guide post 543 is slidably inserted into the guide sleeve 511.

[0063] In summary, the hot press provided in this embodiment operates by setting the required temperature for hot pressing via a temperature controller 520. A drive motor 541 rotates a lead screw, which in turn drives the guide post 543 on the pressure plate 300 to move up and down along the guide sleeve 511. When the pressure plate 300 moves downwards, the heating plate 400 hot presses the substrate on the positioning plate 200. During the hot pressing process, the positioning plate 200 is connected to a negative pressure source to stably attract the substrate and prevent misalignment. The magnet 220 inside the positioning plate 200 further positions the substrate by magnetically attracting the embedded part 700. The spring between the pressure plate 300 and the heating plate 400 provides cushioning. The worktable rotates to change the thin, flexible substrate 600 that needs hot pressing, allowing for the positioning of different thin, flexible substrates 600. Thus, this embodiment completes the hot pressing operation on the substrate through rotation, positioning, and hot pressing.

[0064] The pressure plate 300 is connected to the actuation mechanism, and multiple heating plates 400 are provided and installed on the pressure plate 300 to press the surface through multi-point pressure loading of the large plate, which can ensure uniform pressing force and flat pressing surface.

[0065] In summary, the hot press provided in this embodiment uses the aforementioned worktable, which can quickly and stably position the thin and flexible substrate, preventing the substrate from shifting during the hot pressing process. This effectively protects the substrate during hot pressing, prevents damage to the substrate product, increases the stability of hot pressing, and thus improves the molding quality of the product.

[0066] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A worktable for a hot press, characterized in that, Includes a workbench body (100), and a positioning plate (200) is provided on the upper end of the workbench body (100), the positioning plate (200) being a hollow structure; The upper end of the positioning plate (200) is provided with a positioning pin (210), which is used to pass through the positioning hole of the thin flexible substrate (600); The upper end of the positioning plate (200) is also provided with a plurality of adsorption holes (241), which are connected to the inner cavity of the positioning plate (200). The positioning plate (200) is equipped with a magnet (220) that can magnetically attract embedded parts (700) placed on a thin flexible substrate (600).

2. The worktable for a hot press according to claim 1, characterized in that, The positioning plate (200) also includes a base plate (230), and the magnet (220) is a plate-shaped material adapted to the base plate (230); When the base plate (230) and the magnet (220) are assembled, they can form a closed cavity.

3. The worktable for a hot press according to claim 2, characterized in that, The top of the base plate (230) is provided with multiple connecting grooves (231) arranged in a crisscross pattern. The magnet (220) is provided with a plurality of connecting holes (221), and the plurality of connecting holes (221) are provided in a one-to-one correspondence with the adsorption holes (241), and each connecting hole (221) is directly opposite the corresponding connecting groove (231).

4. The worktable for a hot press according to claim 3, characterized in that, The magnet (220) has a flexible plate (240) at its upper end, and the adsorption hole (241) is disposed on the flexible plate (240).

5. The worktable for a hot press according to any one of claims 1 to 4, characterized in that, The worktable body (100) is a rotatable worktable.

6. A hot press, characterized in that, include: The worktable for a hot press as described in any one of claims 1 to 4; Heating components; An actuation mechanism (500) is used to control the operation of the heating component and drive the heating component to reciprocate towards the positioning plate (200).

7. The hot press according to claim 6, characterized in that, The heating component includes: The pressure plate (300) is connected to the actuating mechanism (500) in a transmission manner; Multiple heating plates (400) are provided, all of which are connected to the pressure plate (300), and a heating tube (410) is provided in the middle.

8. The hot press according to claim 7, characterized in that, The heating plate (400) includes an upper substrate (420) and a lower substrate (430), and the heating tube (410) is sandwiched between the upper substrate (420) and the lower substrate (430).

9. The hot press according to claim 7, characterized in that, The actuating mechanism (500) includes: Mounting bracket (510); The thermostat (520) is mounted on the mounting bracket (510) and electrically connected to the heating tube (410); Multiple thermocouples (530) are provided, all of which are electrically connected to the temperature controller (520) and are used to detect the temperature of the corresponding heating plate (400); A linear drive assembly (540) is used to drive the pressure plate (300) to move up and down.

10. The hot press according to claim 9, characterized in that, The linear drive assembly (540) is a lead screw and slider mechanism driven by a motor.

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