A prepreg production device for BT copper clad plate

Abstract

The present application relates to drying device technical field, particularly to a kind of BT copper-clad plate's prepreg production equipment, for solving the temperature control response speed slow of existing device and easily leading to prepreg overcure or undercuring problem;The device includes heating mechanism, heating mechanism includes heating cylinder, spiral heating wire is arranged in the cylinder wall of heating cylinder, the number density of turns of heating wire is increased from the feeding port to the discharge port of heating cylinder, the part of heating cylinder near the discharge port does not have heating wire in the cylinder wall;Temperature control mechanism is arranged in the heating cylinder;The response speed of the device for baking temperature adjustment is faster, thereby reducing the occurrence of overcuring and undercuring condition, and the hot air in the end of heating cylinder is drained to the middle and reheated again, so that the temperature of middle and internal whole of heating cylinder can rapidly rise, without adjusting heating wire to higher power state, thereby saving the energy consumption of temperature rise.

Description

Technical Field

[0001] This invention relates to the field of drying technology, specifically to a prepreg production equipment for BT copper clad laminates. Background Technology

[0002] In the production of BT copper clad laminate prepreg, the drying and curing process is the core step that determines the quality of the prepreg. It is necessary to gradually increase the temperature to allow the impregnated glass cloth (containing BT resin adhesive) to complete the solvent evaporation and resin B-stage curing. It is necessary to avoid "under-curing" caused by low temperature (excessive volatile content, which makes the copper clad laminate prone to delamination) and "over-curing" caused by high temperature (resin loses fluidity and cannot fill the gaps during pressing). At the same time, the energy consumption of heating and the response speed of temperature adjustment must be taken into account.

[0003] The heating devices commonly used in the production of prepregs (such as hot air ovens and heating cylinders) rely heavily on the power adjustment of a single heating element (such as heating wires or heating tubes) or the overall airflow speed control in the duct, which presents the following key problems:

[0004] Insufficient temperature gradient control precision: The heating elements (such as heating wires) of traditional heating cylinders are mostly uniformly distributed or have a fixed gradient design, which makes it difficult to dynamically adapt to the movement path of the prepreg in the cylinder (preheating at the feed end → main curing in the middle → temperature control at the discharge end). If the temperature at the feed end is too high, the resin will cure prematurely. If the temperature in the middle is insufficient, the curing efficiency will be low, making it difficult to meet the stringent requirements of BT resin for "gradual heating and precise temperature control".

[0005] Temperature adjustment response lag: When the temperature inside the heating cylinder deviates from the set value (such as the temperature in the middle being too low or the temperature at the discharge end being too high), it is necessary to adjust the power of the heating element to achieve temperature control. However, after the power is adjusted, there is a delay in the heat transfer to the effective area inside the cylinder, which can easily lead to abnormal curing state of the prepreg in a short period of time, increasing the defect rate.

[0006] High heating energy consumption: In order to ensure that the middle part of the heating cylinder reaches the temperature required for BT resin curing (usually 80-150℃) quickly, the heating element needs to be maintained at a high power, while the inner end of the cylinder (such as the feed end and discharge end) does not need a high temperature, resulting in some heat waste and overall high energy consumption. Summary of the Invention

[0007] The purpose of this invention is to provide a prepreg production equipment for BT copper clad laminates, which solves the problem that the slow temperature control response speed of existing devices easily leads to over-curing or under-curing of the prepreg.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a prepreg production equipment for BT copper clad laminate, comprising a heating mechanism, wherein the heating mechanism comprises a heating cylinder, wherein a spiral heating wire is disposed inside the cylinder wall, the number of turns of the heating wire increases from the inlet to the outlet of the heating cylinder, and the heating wire is not present in the cylinder wall near the outlet.

[0009] The heating cylinder is equipped with a temperature control mechanism, which includes a hollow ring connected to the inner wall of the heating cylinder and close to the end of the heating wire with a high coil density. A small fan is installed inside the hollow ring, and an air outlet is provided on the hollow ring to cooperate with the small fan. A first drain pipe and a second drain pipe are respectively connected to the two end faces of the hollow ring. The first drain pipe is located on the side of the hollow ring facing the feed inlet of the heating cylinder, and the second drain pipe is located on the side of the hollow ring facing the discharge outlet of the heating cylinder. When the temperature at the hollow ring rises, the second drain pipe opens, and when the temperature at the hollow ring decreases, the first drain pipe opens.

[0010] Preferably, the temperature control mechanism further includes an inner tube that slides inside the first drainage tube. A spring is connected between the inner tube and the first drainage tube. A first through hole and a second through hole are respectively provided on the first drainage tube and the inner tube. When the inner tube slides inside the first drainage tube and compresses the spring, the first through hole and the second through hole communicate with each other.

[0011] Preferably, a conical cap is connected to the end of the second drainage tube, and a mounting bracket is connected between the conical cap and the inner tube. When the inner tube slides on the first drainage tube so that the first through hole is not connected to the second through hole when the spring elastically returns, and the conical cap is moved away from the second drainage tube so that the second drainage tube is opened.

[0012] Preferably, the temperature control mechanism further includes a bracket connected to the hollow ring, a hydraulic motor for driving the small fan is connected to the bracket, an inlet channel and an outlet channel communicating with the hydraulic motor are provided in the bracket, a receiving cavity is provided in the bracket, and a connecting rod is slidably connected in the receiving cavity, the inlet channel and the outlet channel are both communicating with the receiving cavity, and the connecting rod is fixedly connected to the inner tube.

[0013] Preferably, a mounting rod is connected to the mounting bracket, and a temperature sensor is connected to the end of the mounting rod, with the temperature sensor located near the center of the hollow ring;

[0014] The hydraulic motor is connected to a liquid supply pipe. Both the inlet and outlet channels are connected to the liquid supply pipe. When the temperature sensor detects a decrease in temperature, the liquid supply pressure of the liquid supply pipe increases, thereby increasing the speed of the small fan, increasing the pressure inside the containment cavity, and opening the first drainage pipe while closing the second drainage pipe to increase the convection velocity between the heat flow and the semi-finished product. Conversely, when the temperature sensor detects an increase in temperature, the liquid supply pressure of the liquid supply pipe decreases, thereby decreasing the speed of the small fan, decreasing the pressure inside the containment cavity, closing the first drainage pipe, and opening the second drainage pipe to reduce the convection velocity between the heat flow and the semi-finished product.

[0015] Preferably, it also includes a conveying mechanism, which includes two rotating seats, which are respectively fixedly disposed at both ends of the heating cylinder. Each of the two rotating seats is rotatably connected to a rotating roller, and a conveyor belt is driven between the two sets of rotating rollers. The upper parallel section of the conveyor belt passes through the interior of the heating cylinder, and the lower parallel section of the conveyor belt is located at the lower part of the heating cylinder.

[0016] When the temperature sensor detects a decrease in temperature, the conveyor belt speed decreases.

[0017] Preferably, the heating cylinder is provided with a heat preservation mechanism, which includes a first baffle and a second baffle symmetrically connected to both sides of the heating cylinder. The first baffle and the second baffle are respectively provided with a first through groove and a second through groove, and the upper parallel section of the conveyor belt passes through the first through groove and the second through groove.

[0018] Preferably, the heat preservation mechanism further includes a blocking plate, which slides within the first through groove. When the temperature sensor detects an increase in temperature, the blocking plate slides down into the first through groove to increase the opening of the first through groove.

[0019] Preferably, both sides of the blocking plate are provided with protrusions, and an electric telescopic rod is provided inside the first baffle. The output end of the electric telescopic rod is connected to the protrusions. When the temperature sensor detects an increase in temperature, the electric telescopic rod extends.

[0020] Preferably, the outer wall of the heating cylinder is connected to a support leg, and the rotating seat is connected to the support leg.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] Compared to directly adjusting the power of the heating wire to control the temperature inside the heating cylinder, the production device in this embodiment responds to the baking temperature adjustment faster, thereby reducing the occurrence of defective products. Furthermore, the hot air at the end of the heating cylinder is diverted to the middle for reheating, allowing the temperature of the middle and the entire interior of the heating cylinder to rise rapidly without needing to adjust the heating wire to a higher power, thus saving energy consumption for heating. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a cross-sectional view of the present invention;

[0025] Figure 3 This is a schematic diagram of the temperature control mechanism of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the inner tube of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure at the connecting rod of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of the first baffle of the present invention.

[0029] In the diagram: 100, heating mechanism; 110, support leg; 120, heating cylinder; 130, heating wire; 200, conveying mechanism; 210, rotary seat; 220, rotating roller; 230, conveyor belt; 300, temperature control mechanism; 310, hollow ring; 311, air outlet; 320, bracket; 321, liquid inlet channel; 322, liquid outlet channel; 323, connecting rod; 330, hydraulic motor; 340, liquid supply pipe; 341, mounting rod; 342. Temperature sensor; 350, small fan; 360, first drain pipe; 361, first through hole; 370, inner tube; 371, second through hole; 380, spring; 390, second drain pipe; 391, conical cover; 392, mounting bracket; 400, insulation mechanism; 410, first baffle; 420, first through groove; 430, blocking plate; 440, protrusion; 450, electric telescopic rod; 460, second baffle; 470, second through groove. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Reference Figures 1-6 This embodiment provides a technical solution: a prepreg production equipment for BT copper-clad laminates, including a heating mechanism 100, which includes a heating cylinder 120. A spiral heating wire 130 is disposed inside the cylinder wall of the heating cylinder 120. The number of turns of the heating wire 130 increases from the inlet to the outlet of the heating cylinder 120. The portion of the cylinder wall near the outlet of the heating cylinder 120 does not contain the heating wire 130. A temperature control mechanism 300 is disposed inside the heating cylinder 120, including a hollow ring 310 connected to the inner wall of the heating cylinder 120 and located near the heating wire 130 with a high number of turns. At the higher end, a small fan 350 is installed inside the hollow ring 310. An air outlet 311 is opened on the hollow ring 310 to cooperate with the small fan 350. A first drain pipe 360 ​​and a second drain pipe 390 are respectively connected to the two end faces of the hollow ring 310. The first drain pipe 360 ​​is located on the side of the hollow ring 310 facing the feed port of the heating cylinder 120, and the second drain pipe 390 is located on the side of the hollow ring 310 facing the discharge port of the heating cylinder 120. When the temperature at the hollow ring 310 rises, the second drain pipe 390 opens, and when the temperature at the hollow ring 310 drops, the first drain pipe 360 ​​opens.

[0032] The working mechanism of the coating curing device provided in this embodiment is as follows:

[0033] The impregnated glass cloth (hereinafter referred to as the semi-finished product) enters the heating cylinder 120 through the feed inlet. The heating wire 130 has a lower density at the feed inlet, resulting in a lower temperature there. This allows the semi-finished product entering the heating cylinder 120 to be preheated initially. As the semi-finished product continues to move into the heating cylinder 120, the turn density of the heating wire 130 gradually increases, causing the temperature in the middle of the heating cylinder 120 to gradually increase until it reaches the temperature required to dry the semi-finished product. At this time, the semi-finished product moves slowly within this temperature range. When the temperature is low at the point where the turn density of the heating wire 130 is highest, to prevent the semi-finished product from being under-cured, the first guide pipe 360 ​​is opened. This guides the heat flow between the feed inlet and the hollow ring 310 to the position where the turn density of the heating wire 130 is high, and then blows it onto the semi-finished product through the air outlet 311. By reheating the hot air, the temperature inside the heating cylinder 120 is increased. The heating cylinder 120 can achieve a rapid temperature increase. To prevent the semi-finished product from over-curing when the temperature inside the heating cylinder 120 is high, the first drainage pipe 360 ​​is closed and the second drainage pipe 390 is opened. The second drainage pipe 390 draws air from between the outlet and the hollow ring 310. Since there is no heating wire 130 inside the inner wall of the heating cylinder 120, the temperature of the drawn air is lower, which reduces the temperature of the airflow blowing onto the semi-finished product and prevents the semi-finished product from over-curing. With the above settings, compared with directly adjusting the power of the heating wire 130 to control the temperature inside the heating cylinder 120, the production device of this embodiment responds to the adjustment of the baking temperature faster, thereby reducing the occurrence of defective products. Furthermore, the hot air at the end of the heating cylinder 120 is diverted to the middle for reheating, so that the temperature of the middle part and the entire interior of the heating cylinder 120 can rise rapidly without adjusting the heating wire 130 to a higher power, thereby saving energy consumption for heating.

[0034] Regarding the structure of the temperature control mechanism 300, specifically:

[0035] The temperature control mechanism 300 also includes an inner tube 370 that slides inside the first drainage tube 360. A spring 380 is connected between the inner tube 370 and the first drainage tube 360. A first through hole 361 and a second through hole 371 are respectively opened on the first drainage tube 360 ​​and the inner tube 370. When the inner tube 370 slides inside the first drainage tube 360 ​​and compresses the spring 380, the first through hole 361 and the second through hole 371 are connected.

[0036] When the inner tube 370 is pushed, the spring 380 is compressed, which connects the first through hole 361 and the second through hole 371. At this time, the hot flow can enter the inner tube 370 through the first through hole 361 and the second through hole 371, and after being guided by the small fan 350, it is blown to the semi-finished product through the air outlet 311. When the hot flow flows through the inner tube 370, the hot flow will also be close to the densely coiled area of ​​the heating wire 130, and will be further heated. In addition, the first guide tube 360 ​​is close to the inner wall of the heating cylinder 120, ensuring that the hot air near the heating cylinder 120 is guided, further improving the heating efficiency.

[0037] Among the optional methods in this embodiment, the more preferred one is:

[0038] The end of the second drainage tube 390 is connected to a conical cap 391. A mounting bracket 392 is connected between the conical cap 391 and the inner tube 370. The inner tube 370 slides on the first drainage tube 360 ​​so that when the spring 380 elastically returns, the first through hole 361 is not connected to the second through hole 371, and the conical cap 391 moves away from the second drainage tube 390 so that the second drainage tube 390 is opened.

[0039] When the first through hole 361 and the second through hole 371 are connected, the conical cover 391 is fully inserted into the port of the second drain pipe 390, so that the air between the outlet and the hollow ring 310 will not be drawn out. When the first through hole 361 and the second through hole 371 are no longer connected, the conical cover 391 is pulled out from the port of the second drain pipe 390. At this time, the airflow between the hollow ring 310 and the inlet will no longer enter the inner tube 370, and the air between the outlet and the hollow ring 310 will be drawn out by the second drain pipe 390 and blown to the semi-finished product.

[0040] Among the optional methods in this embodiment, the more preferred one is:

[0041] The temperature control mechanism 300 also includes a bracket 320 connected to the hollow ring 310. A hydraulic motor 330 for driving a small fan 350 is connected to the bracket 320. An inlet channel 321 and an outlet channel 322 communicating with the hydraulic motor 330 are opened in the bracket 320. A receiving cavity is opened in the bracket 320, and a connecting rod 323 is slidably connected in the receiving cavity. Both the inlet channel 321 and the outlet channel 322 are communicating with the receiving cavity. The connecting rod 323 is fixedly connected to the inner tube 370.

[0042] The hydraulic motor 330 is driven by fluid, which reduces the operational instability caused by high temperature. The fluid enters from the inlet channel 321 and impacts the rotor of the hydraulic motor 330. After impacting the rotor, the fluid flows out through the outlet channel 322. Since both channels are connected to the receiving cavity, the increased fluid pressure during fluid flow can push the connecting rod 323. As a result, the connecting rod 323 drives the inner tube 370 to slide relative to the first drainage tube 360, thereby opening the first drainage tube 360.

[0043] Among the optional methods in this embodiment, the more preferred one is:

[0044] A mounting rod 341 is connected to the mounting bracket 392, and a temperature sensor 342 is connected to the end of the mounting rod 341. The temperature sensor 342 is close to the middle of the hollow ring 310. A liquid supply pipe 340 is connected to the hydraulic motor 330. The liquid inlet channel 321 and the liquid outlet channel 322 are both connected to the liquid supply pipe 340. When the temperature sensor 342 detects a decrease in temperature, the liquid supply pressure of the liquid supply pipe 340 increases, thereby increasing the speed of the small fan 350, increasing the pressure inside the containment cavity, and opening the first drainage pipe 360 ​​and closing the second drainage pipe 390 to increase the convection velocity of the heat flow and the semi-finished product. Conversely, when the temperature sensor 342 detects an increase in temperature, the liquid supply pressure of the liquid supply pipe 340 decreases, thereby decreasing the speed of the small fan 350, decreasing the pressure inside the containment cavity, and closing the first drainage pipe 360 ​​and opening the second drainage pipe 390 to reduce the convection velocity of the heat flow and the semi-finished product.

[0045] When the temperature sensor 342 detects a decrease in temperature, the liquid supply pressure of the liquid supply pipe 340 increases. At this time, the internal pressure of the receiving cavity increases, the speed of the small fan 350 increases, and the connecting rod 323 drives the first drainage pipe 360 ​​to open, so that the heat flow is guided and further heated before being blown onto the semi-finished product. At this time, the increased speed of the small fan 350 increases the wind speed, improving the convection speed and thus improving the drying effect on the semi-finished product. Conversely, the first drainage pipe 360 ​​closes, the second drainage pipe 390 opens, and the wind speed of the small fan 350 decreases, thus preventing the semi-finished product from being over-cured by high-temperature baking.

[0046] Regarding the structure of the conveying mechanism 200, specifically:

[0047] The conveying mechanism 200 includes two rotating seats 210, which are fixedly mounted at both ends of the heating cylinder 120. Each rotating seat 210 is rotatably connected to a rotating roller 220. A conveyor belt 230 is driven between the two sets of rotating rollers 220. The upper parallel section of the conveyor belt 230 is inserted inside the heating cylinder 120, and the lower parallel section of the conveyor belt 230 is located at the lower part of the heating cylinder 120. When the temperature sensor 342 detects a decrease in temperature, the conveying speed of the conveyor belt 230 decreases.

[0048] The semi-finished product can be placed directly on the conveyor belt 230. The rotation of the roller 220 starts the conveyor belt 230 and feeds the semi-finished product into the heating cylinder 120. By setting four rollers 220 and adjusting the vertical distance between two adjacent rollers 220, the distance between the upper parallel section and the lower parallel section of the conveyor belt 230 is adjusted so that the upper parallel section of the conveyor belt 230 passes through the heating cylinder 120, while the lower parallel section is located at the bottom of the heating cylinder 120. This ensures that the semi-finished product can be fed in without opening large holes at both ends of the heating cylinder 120, thereby reducing the loss of heat in the heating cylinder 120.

[0049] The conveyor belt 230 is set as a mesh, so that the lower part of the semi-finished product can also be dried by heat convection. Alternatively, the conveyor belt 230 can be omitted, and the device can be directly installed in the middle section of the dipping machine, so that the semi-finished product moves in the heating cylinder 120 by the power of the dipping machine.

[0050] Regarding the structure of the insulation mechanism 400, specifically:

[0051] The heat preservation mechanism 400 includes a first baffle 410 and a second baffle 460 symmetrically connected to both sides of the heating cylinder 120. The first baffle 410 and the second baffle 460 are respectively provided with a first through groove 420 and a second through groove 470. The upper parallel section of the conveyor belt 230 passes through the first through groove 420 and the second through groove 470.

[0052] The first baffle 410 and the second baffle 460 are provided to block both ends of the heating cylinder 120. The opening of the first through groove 420 and the second through groove 470 allows the upper parallel section of the conveyor belt 230 to pass through and enter the heating cylinder 120, or allows the semi-finished product to pass directly through the heating cylinder 120.

[0053] Among the optional methods in this embodiment, the more preferred one is:

[0054] The insulation mechanism 400 also includes a blocking plate 430, which slides in the first through groove 420. When the temperature sensor 342 detects an increase in temperature, the blocking plate 430 slides up into the first through groove 420 to increase the opening of the first through groove 420.

[0055] The second baffle 460 is located at the feed inlet of the heating cylinder 120. The gap between the second baffle 460 and the heating wire 130 is small, which allows the semi-finished products conveyed into the heating cylinder 120 to be pre-baked in time. There is a gap between the heating wire 130 and the first baffle 410. This gap prevents the heat generated by the heating wire 130 from being lost too much. The width of the first through groove 420 of the first baffle 410 is higher than that of the second through groove 470 of the second baffle 460. When the temperature inside the heating cylinder 120 is too high, the blocking plate 430 slides upward relative to the first through groove 420, which increases the opening of the first through groove 420, thereby allowing external air to exchange heat with the internal space of the heating cylinder 120 through the first through groove 420.

[0056] Among the optional methods in this embodiment, the more preferred one is:

[0057] Both sides of the blocking plate 430 are provided with protrusions 440. An electric telescopic rod 450 is provided inside the first baffle 410. The output end of the electric telescopic rod 450 is connected to the protrusions 440. When the temperature sensor 342 detects that the temperature has increased, the electric telescopic rod 450 extends.

[0058] When the temperature sensor 342 detects a temperature rise inside the heating cylinder 120, the control system simultaneously controls the electric telescopic rod 450 to extend, thereby lifting the block plate 430 and increasing the opening of the first through slot 420. At the same time, the second drain pipe 390 is in the open state, so that the second drain pipe 390, which faces the first through slot 420, can draw in external air and mix it with the hot air inside the heating cylinder 120 to blow onto the semi-finished product, ensuring that the drying temperature of the semi-finished product is not too high and avoiding over-curing. At the same time, it lowers the temperature inside the heating cylinder 120 to a suitable range. Subsequently, the control system controls the electric telescopic rod 450 to shorten according to the temperature range detected by the temperature sensor 342, while the liquid supply speed of the liquid supply pipe 340 is reduced and the second drain pipe 390 is closed, so that the temperature inside the heating cylinder 120 is maintained at a suitable level.

[0059] Among the optional methods in this embodiment, the more preferred one is:

[0060] The outer wall of the heating cylinder 120 is connected to the support leg 110, and the swivel seat 210 is connected to the support leg 110.

[0061] The support leg 110 provides overall support for the device, and the swivel base 210 is fixed by being connected to the support leg 110.

[0062] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A prepreg production equipment for BT copper-clad laminates, characterized in that: The heating mechanism (100) includes a heating cylinder (120), and a spiral heating wire (130) is provided inside the cylinder wall of the heating cylinder (120). The number of turns of the heating wire (130) increases from the feed port to the discharge port of the heating cylinder (120). The heating wire (130) is not present in the cylinder wall of the heating cylinder (120) near the discharge port. A temperature control mechanism (300) is provided inside the heating cylinder (120). The temperature control mechanism (300) includes a hollow ring (310). The hollow ring (310) is connected to the inner wall of the heating cylinder (120) and is close to the end of the heating wire (130) with a high number of turns. A small fan (350) is provided inside the hollow ring (310). An air outlet (311) is provided on the hollow ring (310) to cooperate with the small fan (350). The two end faces of the hollow ring (310) are respectively connected to... A first drain pipe (360) and a second drain pipe (390) are provided. The first drain pipe (360) is located on the side of the hollow ring (310) facing the feed inlet of the heating cylinder (120), and the second drain pipe (390) is located on the side of the hollow ring (310) facing the discharge outlet of the heating cylinder (120). When the temperature at the hollow ring (310) rises, the second drain pipe (390) opens, and when the temperature at the hollow ring (310) decreases, the first drain pipe (360) opens. The temperature control mechanism (300) further includes an inner tube (370) that slides inside the first drainage tube (360). A spring (380) is connected between the inner tube (370) and the first drainage tube (360). A first through hole (361) and a second through hole (371) are respectively provided on the first drainage tube (360) and the inner tube (370). When the inner tube (370) slides inside the first drainage tube (360) and compresses the spring (380), the first through hole (361) and the second through hole (371) communicate. The end of the second drainage tube (390) is connected to a conical cap (391), and a mounting bracket (392) is connected between the conical cap (391) and the inner tube (370). The inner tube (370) slides on the first drainage tube (360) so that when the spring (380) elastically returns, the first through hole (361) is not connected to the second through hole (371), and the conical cap (391) is away from the second drainage tube (390) so that the second drainage tube (390) is opened. The temperature control mechanism (300) also includes a bracket (320) connected to the hollow ring (310). A hydraulic motor (330) for driving the small fan (350) is connected to the bracket (320). An inlet channel (321) and an outlet channel (322) communicating with the hydraulic motor (330) are provided in the bracket (320). A receiving cavity is provided in the bracket (320), and a connecting rod (323) is slidably connected in the receiving cavity. The inlet channel (321) and the outlet channel (322) are both communicating with the receiving cavity. The connecting rod (323) is fixedly connected to the inner tube (370). A mounting rod (341) is connected to the mounting bracket (392), and a temperature sensor (342) is connected to the end of the mounting rod (341). The temperature sensor (342) is close to the middle of the hollow ring (310). The hydraulic motor (330) is connected to a liquid supply pipe (340). The liquid inlet channel (321) and the liquid outlet channel (322) are both connected to the liquid supply pipe (340). When the temperature sensor (342) detects a decrease in temperature, the liquid supply pressure of the liquid supply pipe (340) increases, thereby increasing the speed of the small fan (350), increasing the pressure inside the containment cavity, and opening the first drainage pipe (360) and closing the second drainage pipe (390) to increase the convection velocity of heat flow and semi-finished product. When the temperature sensor (342) detects an increase in temperature, the liquid supply pressure of the liquid supply pipe (340) decreases, thereby decreasing the speed of the small fan (350), decreasing the pressure inside the containment cavity, and closing the first drainage pipe (360) and opening the second drainage pipe (390) to reduce the convection velocity of heat flow and semi-finished product.

2. The equipment for producing prepreg of BT copper-clad laminate according to claim 1, characterized in that: It also includes a conveying mechanism (200), which includes two rotating seats (210). The two rotating seats (210) are respectively fixedly disposed at both ends of the heating cylinder (120). Each of the two rotating seats (210) is rotatably connected to a rotating roller (220). A conveyor belt (230) is connected between the two sets of rotating rollers (220). The upper parallel section of the conveyor belt (230) is inserted inside the heating cylinder (120), and the lower parallel section of the conveyor belt (230) is located at the lower part of the heating cylinder (120). When the temperature sensor (342) detects a decrease in temperature, the conveyor speed of the conveyor belt (230) decreases.

3. The equipment for producing prepreg of BT copper-clad laminate according to claim 2, characterized in that: The heating cylinder (120) is provided with a heat preservation mechanism (400). The heat preservation mechanism (400) includes a first baffle (410) and a second baffle (460) symmetrically connected to both sides of the heating cylinder (120). The first baffle (410) and the second baffle (460) are respectively provided with a first through groove (420) and a second through groove (470). The upper parallel section of the conveyor belt (230) passes through the first through groove (420) and the second through groove (470).

4. The equipment for producing prepreg of BT copper-clad laminate according to claim 3, characterized in that: The heat preservation mechanism (400) also includes a blocking plate (430), which slides in the first through groove (420). When the temperature sensor (342) detects an increase in temperature, the blocking plate (430) slides up in the first through groove (420) to increase the opening of the first through groove (420).

5. The equipment for producing prepreg of BT copper-clad laminate according to claim 4, characterized in that: Both sides of the blocking plate (430) are provided with protrusions (440), and an electric telescopic rod (450) is provided inside the first baffle (410). The output end of the electric telescopic rod (450) is connected to the protrusion (440). When the temperature sensor (342) detects that the temperature has increased, the electric telescopic rod (450) extends.

6. The equipment for producing prepreg of BT copper-clad laminate according to claim 5, characterized in that: The outer wall of the heating cylinder (120) is connected to a support leg (110), and the rotating seat (210) is connected to the support leg (110).

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