Process for preparing an epoxy glass fiber board with high transparency and equipment thereof

Abstract

The application discloses a preparation process and equipment of an epoxy glass fiber plate with high transparency, and relates to the technical field of plate preparation; and specifically comprises the following steps: glue solution preparation, preheating of an epoxy resin, and adding a curing agent and an accelerator into the preheated epoxy resin to be stirred in a vacuum stirrer to form transparent epoxy glue solution; glue dipping and pre-curing; laminating and hot-pressing curing, multi-layer stacking of the glass fiber cloth after pre-curing, and then hot-pressing curing in a hot-pressing equipment under a temperature rising, pressure applying and negative pressure environment; post-treatment, post-curing of the product in an oven after the hot-pressing curing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plate preparation, in particular to a preparation process and equipment of an epoxy glass fiber plate with high transparency. BACKGROUND

[0002] The epoxy glass fiber plate is a composite material made of glass fiber cloth as reinforcing material, impregnated with epoxy resin, and then heat-pressed and cured. It combines the high strength of glass fiber and the excellent insulation, heat resistance and adhesion of epoxy resin, and finally forms a solid, stable and insulating plate-shaped material.

[0003] Its main application is in the field of electronics and electrical appliances, as a substrate (commonly known as FR-4) for printed circuit boards (PCB), which is the support and insulation body of electronic components. In addition, it is also widely used in the insulation structural parts of the mechanical, aerospace and other industries, such as transformer insulation partition, motor slot wedge, equipment panel, etc., playing the role of insulation, support and protection.

[0004] The basic preparation process is first to immerse the glass fiber cloth in the epoxy resin glue solution to make a semi-cured bonding sheet; then to stack multiple bonding sheets, and cover them with copper foil on the upper and lower surfaces (if used for PCB); finally to press and cure under high temperature and high pressure, so that the resin completely reacts and flows uniformly, and after cooling, a solid plate is formed.

[0005] In the prior art, the epoxy glass fiber plate is directly prepared by heat pressing and curing, but when directly heat-pressed at high temperature, some bubbles in the multi-layer bonding sheet cannot be reliably discharged, resulting in defects in the quality of the finished product. SUMMARY

[0006] The purpose of the present application is to solve the shortcomings in the prior art and provide a preparation process and equipment of an epoxy glass fiber plate with high transparency.

[0007] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0008] A preparation process of an epoxy glass fiber plate with high transparency, comprising the following steps:

[0009] S1: Glue solution preparation, preheat the epoxy resin at 50-60 degrees Celsius, and add a curing agent and an accelerator to the preheated epoxy resin and stir in a vacuum stirrer to form a transparent epoxy glue solution;

[0010] S2: Glue dipping and pre-curing, dip the glass fiber cloth in the prepared transparent epoxy glue solution, and then pre-cure at 80-110 degrees Celsius;

[0011] S3: laminating and hot-pressing curing, after pre-curing, the multi-layer glass fiber cloth is stacked, and then hot-pressing curing is carried out in a hot-pressing equipment in a temperature rising, pressure applying and negative pressure environment;

[0012] S4: post-processing, after hot-pressing curing, the product is placed in an oven at 110-130 degrees Celsius for 2-4 hours for post-curing.

[0013] Preferably: in the S3 step, the following steps are included:

[0014] S31: after being heated from room temperature to 80-90 degrees Celsius, the temperature is kept for 15-30 minutes, and in the process of keeping the temperature, the hot-pressing pressure and the air pressure of the negative pressure environment are changed in a fluctuating manner;

[0015] S32: then continue to heat to 120-135 degrees Celsius and keep for 1-2 hours, and in the process of keeping the temperature, the hot-pressing pressure and the air pressure of the negative pressure environment are constant;

[0016] S33: after cooling to below 50-60 degrees Celsius, the pressure is unloaded and the environment is negative, and then it is taken out.

[0017] A preparation equipment of high-transparency epoxy glass fiber board, comprising a base and a box body fixed to the top of the base, the inner side of the bottom of the box body is driven and matched with a bearing table through a sliding mechanism, the outer wall of the top of the box body is fixed with a pressure hydraulic rod through bolts, the extension end of the pressure hydraulic rod is driven and matched with a pressure table through a transmission mechanism, the back of the box body is provided with a negative pressure generating mechanism, and the front side of the box body is provided with a box door, and the matching surface of the box body and the box door is provided with a sealing gasket.

[0018] On the basis of the foregoing scheme: the bearing table and the pressure table are radially arranged in the same structure, and both the bearing table and the pressure table comprise a seat body, a heating pipe and a mirror surface plate, a partition plate is fixed in the middle of the seat body, the partition plate separates the inner cavity of the seat body into a closed cavity and an open cavity, the mirror surface plate is fixed at the opening of the open cavity of the seat body through bolts, the heating pipe is fixed inside the open cavity of the seat body, and a heat conducting fluid is injected into the open cavity of the seat body.

[0019] In a better scheme in the foregoing scheme: the transmission mechanism comprises a cylinder one fixed to the top outer wall of the pressure table and a piston one slidingly connected to the inner wall of the cylinder one, the top outer wall of the piston one is fixed to the extension end of the pressure hydraulic rod through bolts, and the top outer wall of the cylinder one is provided with a gas hole.

[0020] As a further scheme of the present application: the negative pressure generating mechanism comprises a telescopic driving assembly and at least one accordion air bag, one end of the accordion air bag is fixed to the side wall of the box and communicates with the inner cavity of the box, the other end of the accordion air bag is in a closed state and is fixed with a connecting plate, the telescopic driving assembly is fixed to the side wall of the box, and the telescopic end of the telescopic driving assembly is fixed to the side wall of the connecting plate.

[0021] Meanwhile, the telescopic driving assembly comprises a piston two, a piston rod and a cylinder two, the cylinder two is fixed to the side wall of the box, the piston two is slidingly connected to the inner wall of the cylinder two, one end of the piston rod is fixed to the side wall of the piston two through bolts, and the other end of the piston rod is fixed to the side wall of the connecting plate through bolts.

[0022] As a preferred embodiment of the present application: the bottom side wall of the cylinder one and the end of the cylinder two are provided with oil nozzles respectively communicating with the inner cavities of the cylinder one and the cylinder two, and the two oil nozzles are connected through a connecting pipe.

[0023] Meanwhile, the closed cavity composed of the cylinder one, the connecting pipe and the cylinder two is filled with hydraulic oil.

[0024] As a more preferred scheme of the present application: the sliding mechanism comprises a telescopic device, a guide rail and a sliding block, the guide rail is fixed to the bottom inner wall of the box through bolts, the sliding block is fixed to the bottom outer wall of the bearing table through bolts and slidingly connected to the outer wall of the guide rail, and the telescopic device is fixed to the side wall of the box through bolts, and the telescopic end of the telescopic device is fixed to the one side outer wall of the sliding block through bolts.

[0025] The present application has the following advantages:

[0026] 1. The present application increases the negative pressure environment on the basis of hot pressing, and the hot pressing adopts gradient heating, first low-temperature heating, increases the alternately flowing property of the two sides of the glass fiber plate, and changes the pressure and air pressure in a fluctuating manner, so as to promote the air bubble discharge between different layers and increase the finished product quality.

[0027] 2. The present application utilizes the open cavity of the seat body and the heat-conducting fluid on the basis of heating by the heating pipe, so that the heat of the heating pipe can be uniformly transmitted to the mirror panel, and the heating uniformity is increased, and the seat body is further separated into a closed cavity by the partition plate, so that the heat insulation effect of the closed cavity can prevent the heat of the heating pipe from being lost from the other side which does not need to be heated, and a certain energy-saving effect is achieved.

[0028] 3. The present application, by setting the transmission mechanism, negative pressure generating mechanism, using pleated air bag makes the transmission mechanism and negative pressure generating mechanism realize fluid pressure transmission, so as to realize the pressure of the layered product and the ambient air pressure pressure control at the same time only by the extension and contraction of the pressure hydraulic rod, saves the power arrangement, on the other hand, the setting utilizes the coexistence of the force and the reaction force, realizes the positive correlation of the down pressure and the environmental negative pressure, so as to control the fluctuation of the two pressures only by controlling the extension and contraction force of the pressure hydraulic rod, simplifies the control logic, at the same time, when the pressure is continuously increased, the increase of the environmental negative pressure is also the energy storage of the pressure hydraulic rod, so that after the hot pressing is finished, the pressure hydraulic rod can be reset to a certain extent by using the reaction force, and the energy saving effect is achieved.

[0029] 4. The present application, by setting the sliding mechanism, the load table can be ejected to the opposite outer side of the box during the material taking and discharging process of the epoxy glass fiber plate on the load table, thereby increasing the convenience of material taking and placing. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 A preparation process flow chart of high transparency epoxy glass fiber plate is proposed for the present application;

[0031] Figure 2 The overall structure schematic diagram of the preparation equipment of high transparency epoxy glass fiber plate is proposed for the present application;

[0032] Figure 3 The load table and pressure table structure schematic diagram of the preparation equipment of high transparency epoxy glass fiber plate is proposed for the present application;

[0033] Figure 4 The transmission mechanism structure schematic diagram of the preparation equipment of high transparency epoxy glass fiber plate is proposed for the present application;

[0034] Figure 5 The negative pressure generating mechanism structure schematic diagram of the preparation equipment of high transparency epoxy glass fiber plate is proposed for the present application;

[0035] Figure 6 The extension and contraction driving assembly structure schematic diagram of the preparation equipment of high transparency epoxy glass fiber plate is proposed for the present application;

[0036] Figure 7 The sliding mechanism structure schematic diagram of the preparation equipment of high transparency epoxy glass fiber plate is proposed for the present application.

[0037] In the figure: 1, base; 2, box; 3, bearing table; 4, sealing pad; 5, transmission mechanism; 6, pressure hydraulic rod; 7, pressure table; 8, box door; 9, control cabinet; 10, sliding mechanism; 11, negative pressure generating mechanism; 12, seat body; 13, heating pipe; 14, mirror panel; 15, partition; 16, air hole; 17, piston one; 18, cylinder one; 19, telescopic drive assembly; 20, connecting plate; 21, pleated air bag; 22, piston two; 23, piston rod; 24, cylinder two; 25, telescopic device; 26, guide rail; 27, sliding block; 28, connecting pipe. DETAILED DESCRIPTION

[0038] The technical solutions of the present application will be further described in detail below in combination with specific embodiments.

[0039] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as a limitation of the present application.

[0040] Example 1:

[0041] A preparation process of high-transparency epoxy glass fiber plate, as shown in Figure 1 , comprising the following steps:

[0042] S1: glue solution preparation, preheat the epoxy resin at 50-60 degrees Celsius, and add curing agent and accelerator to the preheated epoxy resin in a vacuum stirrer for stirring to form a transparent epoxy glue solution;

[0043] S2: impregnation and pre-curing, the glass fiber cloth is impregnated in the prepared transparent epoxy glue solution, and then pre-cured at 80-110 degrees Celsius;

[0044] S3: laminating and hot pressing curing, the multiple layers of pre-cured glass fiber cloth are stacked, and then hot pressing curing is carried out in a hot pressing equipment with temperature rising, pressure and negative pressure environment;

[0045] S4: post-treatment, after hot pressing curing, the product is placed in an oven at 110-130 degrees Celsius for 2-4 hours for post-curing.

[0046] In the S3 step, it comprises the following steps:

[0047] S31: after temperature rising from room temperature to 80-90 degrees Celsius, keep warm for 15-30 min, and in the process of keeping warm, the hot pressing pressure and the air pressure of the negative pressure environment are changed in a fluctuating manner;

[0048] S32: Then continue to heat to 120-135 degrees Celsius and keep it at that temperature for 1-2 hours. During the heat preservation process, the magnitude of the hot pressing pressure and the magnitude of the air pressure in the negative pressure environment remain constant.

[0049] S33: After cooling to below 50-60 degrees Celsius, remove the pressure and ambient negative pressure.

[0050] This invention adds a negative pressure environment to the hot pressing process, and uses gradient heating during hot pressing. It first raises the temperature from a low temperature to increase the fluidity of the glass fiber board on both sides, while the pressure and air pressure fluctuate, which promotes the expulsion of air bubbles between different layers and increases the quality of the finished product.

[0051] Example 2:

[0052] A device for preparing a high-transparency epoxy fiberglass board, which is the hot pressing device used in step S3 of Example 1, such as... Figures 2-6 As shown, the hot pressing equipment includes a base 1 and a box 2 fixed to the top of the base 1. The bottom inner side of the box 2 is connected to a support platform 3 via a sliding mechanism 10. The top outer wall of the box 2 is fixed with a pressure hydraulic rod 6 by bolts. The telescopic end of the pressure hydraulic rod 6 is connected to a pressure platform 7 via a transmission mechanism 5. A negative pressure generating mechanism 11 is provided on the back of the box 2, and a box door 8 is provided on the front side of the box 2. A sealing gasket 4 is provided on the mating surface between the box 2 and the box door 8.

[0053] This device does not limit the specific type of the door 8. Its connection form can be rotary or sliding, and its driving form can be manual, electric, hydraulic, etc. All of these are disclosed and relatively mature in the prior art. The door 8 only needs to be able to be opened and closed, and to seal with the opening of the box body 2 when closed. Since this embodiment does not make any creative effort, it will not be described in detail.

[0054] Meanwhile, a control cabinet 9 is provided on one outer wall of the base 1. The control cabinet 9 is connected to the electrical components of the equipment for control. This is also existing technology and is conventional knowledge / method for those skilled in the art. This embodiment will not elaborate on it.

[0055] When using this device, the stacked products can be placed on the top of the support platform 3, and then the box door 8 can be closed to make the inner cavity of the box 2 sealed. At this time, the pressure platform 7 is driven to descend by the pressure hydraulic rod 6, and the support platform 3 and the pressure platform 7 are used to heat press the multi-layer products. At the same time, the negative pressure generating mechanism 11 will draw the inner cavity of the box 2 to negative pressure to achieve heat sealing under negative pressure environment.

[0056] To address heating and heating efficiency issues, such as Figure 3As shown, the bearing table 3 and the pressure applying table 7 are radially arranged in the same structure, and both of them comprise a seat body 12, a heating pipe 13 and a mirror panel 14, the middle part of the seat body 12 is fixed with a partition plate 15, the partition plate 15 separates the inner cavity of the seat body 12 into a closed cavity and an open cavity, the mirror panel 14 is fixed on the opening of the open cavity of the seat body 12 by bolts, and the heating pipe 13 is fixed inside the open cavity of the seat body 12, and the open cavity of the seat body 12 is injected with a heat conducting fluid.

[0057] In this embodiment, the specific heating type of the heating pipe 13 is not limited, and it is limited that the heating pipe 13 is an electric heating wire.

[0058] In the hot pressing process, the heating pipe 13 is powered on to generate Joule heat according to Joule's law, and the Joule heat is transmitted to the mirror panel 14 through the heat conducting fluid, so as to heat the layered product.

[0059] The device can uniformly transmit the heat of the heating pipe 13 to the mirror panel 14 by setting the heating pipe 13, the open cavity of the seat body 12 and the heat conducting fluid, thereby increasing the heating uniformity, and the seat body 12 is separated into a closed cavity by the partition plate 15, so that the heat loss of the heating pipe 13 from the other side which does not need to be heated can be prevented by using the heat insulation effect of the closed cavity, thereby achieving a certain energy saving effect.

[0060] In order to solve the problem of negative pressure environment, such as Figure 4 、 5 , as shown in 6, the transmission mechanism 5 comprises a cylinder body one 18 fixed on the top outer wall of the pressure applying table 7 and a piston one 17 slidingly connected to the inner wall of the cylinder body one 18, the top outer wall of the piston one 17 is fixed on the telescopic end of the pressure hydraulic rod 6 by bolts, and the top outer wall of the cylinder body one 18 is provided with an air hole 16.

[0061] The negative pressure generating mechanism 11 comprises a telescopic driving assembly 19 and at least one pleated air bag 21, one end of the pleated air bag 21 is fixed on the side wall of the box body 2 and communicates with the inner cavity of the box body 2, the other end of the pleated air bag 21 is in a closed state and is fixed with a connecting plate 20, and the telescopic driving assembly 19 is fixed on the side wall of the box body 2, and the telescopic end of the telescopic driving assembly 19 is fixed on the side wall of the connecting plate 20.

[0062] The telescopic driving assembly 19 comprises a piston two 22, a piston rod 23 and a cylinder body two 24, the cylinder body two 24 is fixed on the side wall of the box body 2, the piston two 22 is slidingly connected to the inner wall of the cylinder body two 24, one end of the piston rod 23 is fixed on the side wall of the piston two 22 by bolts, and the other end of the piston rod 23 is fixed on the side wall of the connecting plate 20 by bolts.

[0063] The bottom side wall of the cylinder 1 18 and the end of the cylinder 2 24 are provided with oil nozzles respectively communicating with the inner cavities of the cylinder 1 18 and the cylinder 2 24, and the two oil nozzles are connected by a connecting pipe 28.

[0064] The closed cavity composed of the cylinder 1 18, the connecting pipe 28 and the cylinder 2 24 is filled with hydraulic oil.

[0065] During hot pressing, the pressure hydraulic rod 6 is first elongated, and in cooperation with the gravity of the pressing table 7, the piston 1 7, the cylinder 1 8 and the pressing table 7 are synchronously lowered until the pressing table 7 contacts the top of the layered product and is limited, and then the pressure hydraulic rod 6 continues to be elongated, at which time the piston 1 7 slides downward relative to the cylinder 1 8, the hydraulic oil in the inner cavity of the cylinder 1 8 is extruded into the cylinder 2 4, the piston 2 2 slides outward under the pressure of the hydraulic oil, the connecting plate 20 is moved by the piston rod 23, so that the accordion air bag 21 increases in volume, and the gas in the box 2 is drawn into the accordion air bag 21, and at the same time, the top of the cylinder 1 8 communicates with the inner cavity of the box 2 through the air hole 1 6, and when the piston 1 7 is lowered, the volume of the cavity at the top of the cylinder 1 8 increases, and the gas in the inner cavity of the box 2 is also drawn into through the air hole 1 6, so that a negative pressure is generated in the inner cavity of the box 2, and at the same time, since force is mutual, when a negative pressure is generated in the inner cavity of the box 2, the accordion air bag 21 will also be subjected to a reverse contraction trend, so that the hydraulic oil in the inner cavity at the bottom of the cylinder 1 8 has a pressure through the force transmission of the trend, and the pressure of the hydraulic oil also acts downward on the top of the pressing table 7, so as to realize the application of downward pressure.

[0066] The device, by setting the transmission mechanism 5 and the negative pressure generating mechanism 1 1, utilizes the accordion air bag 21 to realize the fluid pressure transmission of the transmission mechanism 5 and the negative pressure generating mechanism 1 1, so that the simultaneous control of the pressure of the layered product and the ambient pressure can be realized only by the extension and contraction of the pressure hydraulic rod 6, the power layout is saved, and on the other hand, the positive correlation of the downward pressure and the ambient negative pressure is realized by utilizing the characteristics of the coexistence of action force and reaction force, so that the fluctuation of the two pressures can be controlled only by controlling the extension and contraction force of the pressure hydraulic rod 6, the control logic is simplified, and at the same time, when the pressing pressure is continuously increased, the increase of the ambient negative pressure is also the energy storage of the pressure hydraulic rod 6, so that after the hot pressing is completed, the pressure hydraulic rod 6 can be reset to a certain extent by utilizing the reaction force, so as to achieve the energy saving effect.

[0067] In order to solve the convenience problem, such as Figure 7As shown, the sliding mechanism 10 includes an extender 25, a guide rail 26 and a sliding block 27, the guide rail 26 is fixed on the bottom inner wall of the box 2 by bolts, the sliding block 27 is fixed on the bottom outer wall of the bearing table 3 by bolts, and the sliding block 27 is slidingly connected to the outer wall of the guide rail 26, the extender 25 is fixed on the side wall of the box 2 by bolts, and the extensible end of the extender 25 is fixed on one side of the outer wall of the sliding block 27 by bolts.

[0068] When in the feeding and discharging state, at this time the extender 25 is extended, which drives the sliding block 27 to slide along the guide rail 26, so that the bearing table is located at the opening of the box 2, at this time the worker can feed and discharge, when in the working state, the extender 25 is retracted, which drives the sliding block 27 to slide along the guide rail 26, so that the bearing table 3 is located directly below the pressing table 7, and then the pressing table 7 is lowered to press and perform hot pressing operation.

[0069] The device, by setting the sliding mechanism 10, can lift the bearing table 3 to the opposite outer side of the box 2 during the taking and discharging process of the epoxy glass fiber plate on the bearing table 3, thereby increasing the convenience of taking and placing the material.

[0070] In use, the stacked product can be placed on the top of the bearing table 3, then the box door 8 is closed, so that the inner cavity of the box 2 is in a sealed state, then the first pressing hydraulic rod 6 is elongated, cooperates with the gravity of the cylinder body one 18 and the pressing table 7, and drives the piston one 17, the cylinder body one 18 and the pressing table 7 to descend synchronously until the pressing table 7 contacts the top of the layered product and is limited, then the first pressing hydraulic rod 6 continues to elongate, at this time the piston one 17 slides downward relative to the cylinder body one 18, the hydraulic oil in the inner cavity of the cylinder body one 18 is extruded into the cylinder body two 24, the piston two 22 slides outward under the pressure of the hydraulic oil, the connecting plate 20 is moved through the piston rod 23, so that the pleated air bag 21 increases in volume, the gas in the box 2 is sucked into the pleated air bag 21, at the same time the top of the cylinder body one 18 communicates with the inner cavity of the box 2 through the air hole 16, when the piston one 17 descends, the volume of the top cavity of the cylinder body one 18 increases, which also sucks the gas in the inner cavity of the box 2 through the air hole 16, so that the inner cavity of the box 2 generates negative pressure, at the same time, since the force is mutual, when the inner cavity of the box 2 generates negative pressure, it also makes the pleated air bag 21 have a reverse shrinking trend, so that the hydraulic oil in the bottom inner cavity of the cylinder body one 18 has pressure through the force transmission of the trend, so that the pressure of the hydraulic oil also acts downward on the top of the pressing table 7, to realize the application of downward pressure, at the same time, the heating pipe 13 is electrified to generate Joule heat according to Joule's law, the Joule heat is transmitted to the mirror plate 14 through the heat conducting fluid, so as to heat the layered product.

[0071] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A process for the production of high transparency epoxy glass fiber board, characterized in that, It comprises the following steps: S1: glue solution preparation, preheating the epoxy resin at 50-60 degrees Celsius, and adding curing agent and accelerator to the preheated epoxy resin and stirring in a vacuum stirrer to form a transparent epoxy glue solution; S2: impregnation and pre-curing, the glass fiber cloth is impregnated in the prepared transparent epoxy glue solution, and then pre-cured at 80-110 degrees Celsius; S3: laminating and hot pressing curing, the multiple layers of pre-cured glass fiber cloth are stacked, and then hot pressing curing is carried out in a hot pressing equipment with temperature rising, pressure and negative pressure environment; S4: post-processing, after hot pressing curing, the product is placed in an oven at 110-130 degrees Celsius for 2-4 hours for post-curing; The S3 step comprises the following steps: S31: from room temperature to 80-90 degrees Celsius, and then keep warm for 15-30 minutes, in the process of keeping warm, the hot pressing pressure and the air pressure of the negative pressure environment fluctuate; S32: then continue to heat to 120-135 degrees Celsius, and then keep warm for 1-2 hours, in the process of keeping warm, the hot pressing pressure and the air pressure of the negative pressure environment are constant; S33: cool down to below 50-60 degrees Celsius, unload the pressure and the environmental negative pressure, and then take out.

2. An apparatus for producing an epoxy glass fiber board with high transparency, which is a hot press apparatus used in the S3 step of the production process of the epoxy glass fiber board with high transparency according to claim 1, characterized by, The hot pressing equipment comprises a base (1) and a box body (2) fixed on the top of the base (1), the inner side of the bottom of the box body (2) is driven and matched with a bearing table (3) through a sliding mechanism (10), the outer wall of the top of the box body (2) is fixed with a pressing hydraulic rod (6) through bolts, the telescopic end of the pressing hydraulic rod (6) is driven and matched with a pressing table (7) through a transmission mechanism (5), the back of the box body (2) is provided with a negative pressure generating mechanism (11), and the front side of the box body (2) is provided with a box door (8), the matching surface of the box body (2) and the box door (8) is provided with a sealing gasket (4); The transmission mechanism (5) comprises a cylinder one (18) fixed on the top outer wall of the pressing table (7) and a piston one (17) slidingly connected to the inner wall of the cylinder one (18), the top outer wall of the piston one (17) is fixed to the telescopic end of the pressing hydraulic rod (6) through bolts, and the top outer wall of the cylinder one (18) is provided with a gas hole (16); The negative pressure generating mechanism (11) comprises a telescopic driving assembly (19) and at least one pleated air bag (21), one end of the pleated air bag (21) is fixed to the side wall of the box body (2) and communicates with the inner cavity of the box body (2), the other end of the pleated air bag (21) is in a closed state and fixed with a connecting plate (20), and the telescopic driving assembly (19) is fixed to the side wall of the box body (2), and the telescopic end of the telescopic driving assembly (19) is fixed to the side wall of the connecting plate (20).

3. The apparatus for producing an epoxy glass fiber board with high transparency according to claim 2, wherein The bearing table (3) and the pressure table (7) are radially arranged in the same structure, and the bearing table (3) and the pressure table (7) each comprise a seat body (12), a heating pipe (13) and a mirror panel (14), the middle part of the seat body (12) is fixed with a partition plate (15), the partition plate (15) divides the inner cavity of the seat body (12) into a closed cavity and an open cavity, the mirror panel (14) is fixed at the opening of the open cavity of the seat body (12) through bolts, and the heating pipe (13) is fixed inside the open cavity of the seat body (12), and the open cavity of the seat body (12) is injected with a heat-conducting fluid.

4. The apparatus for preparing an epoxy glass fiber board having high transparency according to claim 2, wherein The telescopic drive assembly (19) comprises a piston two (22), a piston rod (23) and a cylinder two (24), the cylinder two (24) is fixed to the side wall of the box body (2), the piston two (22) is slidingly connected to the inner wall of the cylinder two (24), one end of the piston rod (23) is fixed to the side wall of the piston two (22) through bolts, and the other end of the piston rod (23) is fixed to the side wall of the connecting plate (20) through bolts.

5. The apparatus for producing an epoxy glass fiber board with high transparency according to claim 4, wherein The bottom side wall of the cylinder one (18) and the end of the cylinder two (24) are provided with oil nozzles respectively communicating with the inner cavities of the cylinder one (18) and the cylinder two (24), and the two oil nozzles are connected through the pleated air bag (21).

6. The apparatus for producing an epoxy glass fiber board with high transparency according to claim 5, wherein The closed cavity composed of the cylinder one (18), the pleated air bag (21) and the cylinder two (24) is injected with hydraulic oil.

7. The apparatus for preparing an epoxy glass board having high transparency according to claim 2, wherein The sliding mechanism (10) comprises a telescopic device (25), a guide rail (26) and a sliding block (27), the guide rail (26) is fixed to the bottom inner wall of the box body (2) through bolts, the sliding block (27) is fixed to the bottom outer wall of the bearing table (3) through bolts, and the sliding block (27) is slidingly connected to the outer wall of the guide rail (26), and the telescopic device (25) is fixed to the side wall of the box body (2) through bolts, and the telescopic end of the telescopic device (25) is fixed to one side of the outer wall of the sliding block (27) through bolts.

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