A composite part heating and curing forming tool

Abstract

The application discloses a composite part heating and curing forming tool, and belongs to the technical field of composite material forming processing equipment.The composite part heating and curing forming tool comprises a conveyor and a conveying box, the belt of the conveyor is arranged in a ring shape between two driving rollers, the conveying box comprises a shell provided with a communicating cavity, the shell is provided with a part to be heated at the top end, and the top end of the shell is symmetrically provided with a middle hole at the long side of the part to be heated.The application realizes adaptive switching of an air flow guiding mode through synchronous vertical displacement of a lifting frame and a return air box.In the first stage, a baffle is unfolded in an eight-character shape to separate the air outlet, most of the hot air flows into the communicating cavity of the conveying box through the side channel, the part to be heated is wrapped and gently heated through the side wall, and the remaining air flow directly blows the top surface of the workpiece after diameter expansion and speed reduction through the middle channel, so that wrinkles are avoided on the surface of the un-cured prepreg.

Description

Technical Field

[0001] This invention belongs to the technical field of processing equipment for composite material molding, and specifically relates to a tooling for heating and curing composite parts. Background Technology

[0002] In the manufacturing process of composite material components, such as prepreg parts, heat curing is a key step that determines the performance and quality of the final product. Traditional heat curing processes often use fixed ovens. Although these types of equipment can provide a stable temperature field to cure and shape the prepreg parts into finished composite parts, they are not ideal for manufacturing composite materials.

[0003] However, in practical applications, especially when processing surface-sensitive composite materials, fixed ovens using hot air heating can generate excessively strong direct hot air blowing. For prepreg parts, the outer layer is a coating layer to be cured. This high-flow-rate direct blowing can easily cause wrinkles or displacement of the uncured prepreg, affecting the molding accuracy. However, if the air output power is reduced, the curing speed of the inner layer of the prepreg part will be slow, prolonging the overall curing time and reducing the curing efficiency. Therefore, a heating and curing molding fixture for composite parts is provided. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a tooling for heating and curing composite parts.

[0005] The technical solution adopted to solve the above technical problems is: A composite material heat curing molding fixture, comprising: A conveying assembly includes a conveyor and a conveyor box. The conveyor belt is arranged in a circular rotation between two drive rollers. The conveyor box includes a shell with a communicating cavity. A component to be heated is provided at the top of the shell. A central hole is symmetrically provided at the long side of the component to be heated at the top of the shell. An upward-opening boss is symmetrically provided at the short side of the component to be heated at the top of the shell. A heating box includes a fixed frame, an inner liner installed inside the fixed frame, a movable frame slidably installed at the bottom of the inner liner, an air outlet at the bottom opening of the movable frame, and a partition installed between the bottom end of the inner liner and the bottom end of the movable frame, the partition dividing the air outlet into two side channels and a middle channel. Two return air boxes are symmetrically arranged on both sides of the moving frame. The bottom of the main body is provided with a bottom hole, and the side of the main body facing the moving frame is provided with a side hole, in which a flap is installed.

[0006] In this process, the conveyor horizontally pushes the conveyor box past the moving frame and return air box, transporting the workpiece to be cured to the area directly below the heating box. In the first stage, rapid outer layer heating and curing is performed. The moving frame and return air box are moved downward by the lifting frame. At this time, the boss is inserted into the main body through the bottom hole, the side hole is closed by the flip plate, and the two partitions are octagonal to separate the side channel and the middle channel. The side channel and the middle hole of the conveyor box are directly opposite each other. The airflow after being heated by the inner liner blows out through the moving frame. The two side channels intercept eight-ninths of the airflow, which flows through the middle hole into the connecting cavity of the conveyor box, and heats the workpiece through the side wall of the conveyor box. Then, it flows into the main body through the boss and is uniformly extracted for secondary recycling. The remaining one-ninth of the airflow enters the middle channel and is guided by the two partitions in an octagonal shape to expand the diameter and reduce the speed, directly blowing on the top surface of the workpiece for heating. The reduced airflow effectively prevents the workpiece from being blown into wrinkles before curing. Moreover, the continuous flow of this airflow keeps the moving frame under high pressure, from the seam The first stage prevents external cold air from entering and affecting heating efficiency. In the second stage, the inner insulation layer continues to solidify. The moving frame and return air box continue to move downwards via the lifting frame. At this time, the top of the boss abuts against the bottom of the pipe. The flap opens the side hole and the partition is in a vertical state to separate the side channel and the middle channel. The airflow after being heated by the inner liner blows out through the moving frame. Two-thirds of the airflow is intercepted by the two side channels and flows through the middle hole into the connecting cavity of the conveyor box. The component to be heated is wrapped and heated through the side wall of the conveyor box. Then it flows into the main body through the boss and is uniformly extracted. The remaining one-third of the airflow enters the middle channel and is vertically guided by the two partitions to blow directly onto the top surface of the component to be heated. Moreover, more airflow directly contacts the component to be heated instead of through the side wall of the conveyor box, which can improve the heating efficiency of the component to be heated. In addition, more gas flowing in will make the internal pressure of the moving frame higher. In order to reduce the waste of hot air, the side hole can suck away the hot air in the moving frame for secondary recycling, avoiding excessive heat loss and energy waste.

[0007] Furthermore, it also includes a frame, which is rotatably connected to the two drive rollers, and a support plate is provided in the middle of the belt. The support plate is used to support the bottom surface of the upper belt and is fixedly connected to the frame.

[0008] Through the above technical solution, in order to ensure the smooth transport of the conveyor belt to the conveyor box, a frame is designed as a base to install the drive roller and provide a power source such as a geared motor for the drive roller. During the transport, in order to prevent the belt from sagging due to the excessive length of the belt and the middle suspended position, a support plate is designed in the middle to support the suspended section of the belt, ensuring that the belt and the conveyor box are always horizontal and preventing the conveyor box from tilting at an angle, which would prevent the boss from being able to be smoothly inserted into the bottom hole.

[0009] Furthermore, the vertical side wall of the moving frame is provided with a connector, the connector is connected to an air supply pipe assembly, the inner liner is equipped with a heater, the inlet of the inner liner is connected to the side space of the moving frame through a telescopic pipe, and the side space is connected to the connector and isolated from the air outlet.

[0010] Through the above technical solution, in order to provide a continuous hot airflow, the outside air is pressurized by the blower of the air supply duct assembly and can be delivered from the joint position to the side space of the moving frame. Then, it enters the inner liner through the telescopic pipe and comes into contact with the heater to complete the heating of the airflow. In addition, the telescopic pipe can extend and retract in the vertical direction, which can ensure the smooth delivery of airflow when the moving frame moves up and down.

[0011] Furthermore, the top of the main body of the return air box is provided with a pipe, the radius of which is equal to the width of the boss, and a filter is connected to the outside of the pipe.

[0012] Through the above technical solution, the specific structure of the main body is disclosed. In the second stage, when the top of the boss presses against the pipe, it does not completely block the pipe. This allows hot air to be drawn from the moving frame through the open side hole, thus achieving smooth recovery of the hot airflow. At the same time, before the hot airflow is reused, it is sent to the filter for purification and then sent to the inlet of the air supply duct group to complete the recycling.

[0013] Furthermore, the partition includes a slide plate one and a slide plate two. The bottom end of the inner liner is equipped with a slide rail two that is slidably connected to the top end of the slide plate one. The bottom end of the moving frame is equipped with a slide rail one that is slidably connected to the bottom end of the slide plate two. The bottom end of the slide plate one is equipped with a dovetail pin, and the slide plate two is provided with a dovetail groove corresponding to the dovetail pin.

[0014] The above technical solution discloses a specific configuration of a partition. The partition is designed as two separate sliding plates, a first sliding plate and a second sliding plate, which are slidably connected by a dovetail pin and a dovetail groove to form a whole with a variable length. With this design, when the position between the moving frame and the inner liner changes, the length of the partition can also be extended or retracted while the angle changes, so that the movement of the moving frame can be smoother and the resistance of position change can be reduced.

[0015] Furthermore, the slide rail 1 and slide rail 2 are respectively provided with a stop block 1 and a stop block 2 at the three equal divisions, a spring 1 is installed between the top of the slide plate 1 and the inner wall of the middle part of the slide rail 2, and a spring 2 is installed between the bottom of the slide plate 2 and the inner wall of the end of the slide rail 1.

[0016] Through the above technical solution, in order to achieve angle control of slide plate one and slide plate two, before the moving frame descends, the bottom of the moving frame and the bottom of the inner liner are in contact with each other. At this time, slide plate one and slide plate two are in a horizontal state, and spring one and spring two are in a compressed state. When the moving frame descends to the first stage, the bottom of the moving frame and the bottom of the inner liner are separated by a certain distance. At this time, the originally horizontal slide plate one and slide plate two will be pulled into a figure-eight shape and unfolded. Spring one and spring two are in a partially released state. When the moving frame descends to the second stage, the bottom of the moving frame and the bottom of the inner liner are separated by a larger distance. At this time, slide plate one and slide plate two will be pulled into a vertical state, and spring one and spring two are in a almost fully released state. At this time, stop block one and stop block two will block the top of slide plate one and the bottom of slide plate two to ensure the stability of the position of slide plate one and slide plate two. When the conveyor box needs to continue to move forward, the moving frame will move up and approach the inner liner, and spring one and spring two will be compressed again.

[0017] Furthermore, the component to be heated is embedded in the top surface of the outer shell, and a rib is provided in the communicating cavity of the outer shell corresponding to the position of the component to be heated, and a through hole is provided in the middle of the rib.

[0018] The above technical solution improves the heating effect of the outer shell on the heated component. The design of the connecting cavity allows airflow to pass smoothly, but the effective contact area is small. Multiple ribs are designed inside, and the ribs are made of high thermal conductivity material. This allows for more efficient absorption of heat from the hot airflow and transfer to the heated component, effectively improving the heating efficiency. In addition, multiple through holes are arranged at equal intervals above and below to reduce obstruction of the airflow in the horizontal direction, which can further increase the effective contact area and improve the thermal conductivity.

[0019] Furthermore, the lifting frame includes a frame, a connecting frame, and a lead screw. The frame is symmetrically installed on the vertical inner wall of the fixed frame. A guide rod is provided at the edge of the frame. The connecting frame is slidably installed on the middle of the outer side of the guide rod. A lead screw is installed in the middle of the connecting frame through a lead screw sleeve. The connecting frame is fixedly connected to the moving frame and the vertical outer wall of the main body. A drive motor is externally connected to the lower end of the lead screw.

[0020] The above technical solution discloses a specific configuration of a lifting frame. The frame consists of two square frames fixed to the inner wall of the fixed frame, providing rigid support for the entire lifting frame. A connecting frame is installed in the middle of the frame through a lead screw and a guide rod. The connecting frame can be moved up and down by the rotation of the drive motor, thereby driving the moving frame and the main body to move vertically from both sides, thus completing a stable vertical movement.

[0021] Furthermore, the width of the lower half of the boss is equal to the width of the bottom hole, the vertical sidewall of the upper half of the boss converges towards the centerline, and the width of the upper half of the boss is less than the width of the bottom hole.

[0022] Through the above technical solution, in order to achieve smooth insertion of the boss into the bottom hole, the top of the boss is narrowed during the design. In this way, the inclined sidewall of the upper part of the boss can play a guiding role. When the main body moves downward, even if there is a partial positional deviation, when the sidewall of the bottom hole squeezes the inclined sidewall of the boss, the conveyor box can be automatically centered and aligned. Furthermore, after the boss is generally half-inserted into the bottom hole in the first stage, the sidewall of the lower part of the boss can completely block the bottom hole, ensuring that the airflow flowing out of the boss position can be completely collected by the main body.

[0023] Furthermore, partition boxes are provided on both sides of the fixed frame corresponding to the positions of the conveyor. Each partition box includes a box body, an opening on the side of the box body away from the fixed frame is provided with a movable door, and an opening on the side of the box body close to the fixed frame is provided with a fan.

[0024] To further reduce heat loss through the above technical solution, partition boxes are installed at the normally open areas on both sides of the fixed frame. The movable doors of the partition boxes are controllable, opening when the conveyor box passes and closing when heating and curing are performed. When the partition boxes are open, the fan operates to blow the hot air inside out through the movable doors of the partition boxes, preventing cold air from the outside and ensuring a stable temperature inside the fixed frame. At the same time, it prevents external debris from entering and ensures the cleanliness of the internal space.

[0025] The beneficial effects of this invention are as follows: This invention achieves adaptive switching of airflow guidance mode by driving the lifting frame to move vertically in sync with the return air box. In the first stage, the partition opens in a figure-eight shape to separate the air outlet, allowing most of the hot airflow to enter the connecting cavity of the conveying box through the side channel. The hot airflow is gently heated by wrapping the workpiece through the side wall, while the remaining airflow is decelerated by expanding the diameter of the central channel and then blows directly onto the top surface of the workpiece, avoiding wrinkles on the surface of the uncured prepreg. In the second stage, the partition is straightened into a vertical state, and the airflow distribution ratio is adjusted to about two-thirds being heated by wrapping through the side channel and one-third being blown directly onto the top surface, significantly improving the internal curing efficiency.

[0026] This invention utilizes a cooperative structure between a moving frame and a return air box. In the first stage, the continuous flow of hot air into the moving frame causes its internal pressure to be higher than that of the external environment. The hot air overflows from the gap between the moving frame and the fixed frame, forming a positive pressure barrier that effectively prevents external cold air from intruding into the heating chamber and ensures heating efficiency. In the second stage, the side holes on the side wall of the return air box are opened by a flap, connecting to the high-pressure area inside the moving frame. Excess hot air is drawn into the return air box and purified by a filter connected to the top pipe before being recirculated into the air supply duct assembly, significantly reducing energy consumption.

[0027] This invention optimizes the structure of the top boss of the conveyor box and the bottom hole of the return air box body to construct a stable return air path and an automatic centering guide mechanism. The width of the lower half of the boss is equal to the width of the bottom hole, and the upper half of the side wall converges towards the centerline to form a guide slope. When the return air box moves downward, the side wall of the bottom hole squeezes the slope of the boss, automatically correcting the horizontal position of the conveyor box. In the first stage, the lower half of the side wall of the boss completely blocks the gap between the bottom hole and the boss, so that the airflow heated by being wrapped by the side wall of the conveyor box can only flow into the return air box body through the internal channel of the boss. In the second stage, the top of the boss abuts against the bottom end of the top pipe of the return air box. At this time, the side hole opens, and the airflow enters the return air box through the gap between the boss and the pipe, realizing hot air recovery. Attached Figure Description

[0028] Figure 1 This is a first-view structural diagram of the present invention; Figure 2 This is a second-view structural diagram of the present invention; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 This is a partial structural schematic diagram of the present invention; Figure 5 This is a schematic diagram of the structure between the heating box, the return air box, and the lifting frame of the present invention; Figure 6 This is a cross-sectional schematic diagram of the conveyor box of the present invention; Figure 7 This is a schematic diagram showing the positions of the heating box, return air box, and conveyor box in this invention. Figure 1 ; Figure 8 This is a schematic diagram showing the positions of the moving frame, inner liner, and partition of the present invention. Figure 1 ; Figure 9 This is a schematic diagram showing the positions of the heating box, return air box, and conveyor box in this invention. Figure 2 ; Figure 10 This is a schematic diagram showing the positions of the moving frame, inner liner, and partition of the present invention. Figure 2 ; Figure 11 This is a schematic diagram of the structure between the moving frame, inner liner and partition of the present invention.

[0029] Attached reference numerals: 1. Frame; 2. Conveyor; 21. Belt; 22. Support plate; 3. Heating box; 31. Fixed frame; 32. Moving frame; 321. Connector; 33. Air outlet; 331. Side passage; 332. Central passage; 34. Partition; 341. Slide plate one; 3411. Dovetail pin; 342. Slide plate two; 3421. Dovetail groove; 343. Spring one; 344. Spring two; 345. Slide rail one; 34 6. Block 1; 347. Slide rail 2; 348. Block 2; 35. Inner liner; 36. Telescopic tube; 4. Partition box; 41. Box body; 42. Fan; 5. Air supply duct assembly; 6. Return air box; 61. Main body; 611. Pipe; 62. Side hole; 63. Bottom hole; 64. Flip plate; 7. Lifting frame; 8. Conveying box; 81. Outer shell; 82. Component to be heated; 83. Boss; 84. Connecting cavity; 85. Central hole. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0031] Example 1 like Figure 1 - Figure 11 As shown, this embodiment provides a composite material heating and curing molding fixture for efficient and uniform heating and curing of the parts to be heated. The fixture includes core structures such as a conveying assembly, a heating chamber 3, and a return air chamber 6. The specific structure and workflow are as follows.

[0032] The assembly mainly consists of a conveyor 2 and a conveyor box 8. The conveyor 2's belt 21 is arranged in a circular rotation between two drive rollers for horizontal conveying. The conveyor box 8 includes a housing 81 with a communicating cavity 84. The top of the housing 81 has an area for placing the component 82 to be heated. At the top of the housing 81, a central hole 85 is symmetrically provided along the long side of the component 82 to be heated, and an upward-opening boss 83 is symmetrically provided along the short side of the component 82 to be heated.

[0033] The heating chamber 3 includes a fixed frame 31 and an inner liner 35 installed inside the fixed frame 31. A movable frame 32 is slidably mounted on the bottom of the inner liner 35 from the fixed frame 31. The movable frame 32 has an air outlet 33 at the bottom opening of the inner liner 35. A partition 34 is installed between the bottom end of the inner liner 35 and the bottom end of the movable frame 32, which divides the air outlet 33 into two side channels 331 and a central channel 332.

[0034] Two return air boxes 6 are provided, symmetrically arranged on both sides of the moving frame 32. The bottom of the main body 61 of the return air box 6 has a bottom hole 63, and the side hole 62 is provided on the side facing the moving frame 32. A flap 64 for controlling opening and closing is installed in the side hole 62.

[0035] The workflow of this embodiment is as follows: The heating and curing process is divided into two stages. The height of the moving frame 32 and the return air box 6 is adjusted by the lifting frame 7 to achieve different airflow control modes.

[0036] Phase 1: Rapid outer layer heat curing The conveyor 2 horizontally pushes the conveyor box 8, positioning it directly below the heating box 3. The lifting frame 7 moves the moving frame 32 and the return air box 6 downwards; at this time, the boss 83 of the conveyor box 8 is inserted through the bottom hole 63 of the main body 61 of the return air box 6; the flap 64 is in the closed state, sealing the side hole 62; the partition 34 is arranged in a V-shape, separating the side channel 331 and the middle channel 332; the airflow heated by the inner liner 35 is blown out through the moving frame 32. Of this, about eight-ninths of the airflow is intercepted by the two side channels 331, flows through the middle hole 85 through the connecting cavity 84 of the conveyor box 8, and is wrapped and heated in a manner through the side wall of the conveyor box 8. The heated airflow then flows into the main body 61 through the boss 83 and is uniformly extracted for secondary recycling; the remaining about one-ninth of the airflow enters the middle channel 332 and is guided by the V-shaped partition 34, achieving expansion and speed reduction before being directly blown onto the top surface of the item to be heated 82. The reduced airflow effectively prevents the heated part 82 from being blown into wrinkles before curing; as the airflow continues to flow in, the moving frame 32 is under high pressure, and hot air overflows from the gaps, effectively preventing external cold air from entering, thus ensuring heating efficiency.

[0037] Phase Two: Continuous Curing of the Insulation Inner Layer The lifting frame 7 drives the moving frame 32 and the return air box 6 to continue moving downwards; at this time, the top of the boss 83 abuts against the bottom of the pipe 611; the flap 64 opens the side hole 62; the partition 34 is in a vertical state, separating the side channel 331 and the middle channel 332; the airflow heated by the inner liner 35 is blown out again through the moving frame 32. At this time, about two-thirds of the airflow flows through the side channel 331 and the middle hole 85 through the connecting cavity 84, undergoes enveloping heating, and flows into the main body 61 through the boss 83 and is uniformly extracted; the remaining about one-third of the airflow enters the middle channel 332 and is guided by the vertical partition 34, blowing directly onto the top surface of the component 82 to be heated. Compared with the first stage, a larger proportion of the airflow directly contacts the component 82 to be heated, improving the heating efficiency; due to the larger proportion of airflow directly contacting the component 82 to be heated, the internal pressure of the moving frame 32 further increases. To reduce hot air waste, the opened side hole 62 draws away the hot air inside the moving frame 32 for secondary recycling, thus avoiding energy waste caused by excessive hot air loss.

[0038] Through the synergistic effect of the two stages mentioned above, the tooling in this embodiment can achieve rapid preheating, wrinkle-free curing, and efficient heat preservation of composite material parts, significantly improving the quality of heat curing and energy utilization.

[0039] In a further embodiment, to ensure smooth transport of the belt 21 to the conveyor box 8, refer to Figure 3 Based on embodiment 1, it also includes a frame 1, which is rotatably connected to two drive rollers. A support plate 22 is provided in the middle of the belt 21. The support plate 22 is used to support the bottom surface of the upper belt 21. The support plate 22 is fixedly connected to the frame 1. The frame 1 is designed as a base to install the drive rollers and provide a power source such as a reduction motor for the drive rollers. During conveying, in order to prevent the belt 21 from being too long and causing the middle suspended position to sag, a support plate 22 is designed in the middle to support the suspended section of the belt 21, ensuring that the belt 21 and the conveyor box 8 are always horizontal, and preventing the conveyor box 8 from tilting at an angle, which would prevent the boss 83 from being able to be smoothly inserted into the bottom hole 63.

[0040] In a further embodiment, to provide a continuous flow of hot air, refer to Figure 2 and Figure 9 The moving frame 32 has a connector 321 on its vertical side wall. The connector 321 is connected to an air supply pipe assembly 5. The inner liner 35 contains a heater. The inlet of the inner liner 35 is connected to the side space of the moving frame 32 through a telescopic pipe 36. The side space is connected to the connector 321 and isolated from the air outlet 33. Outside air is pressurized by the blower of the air supply pipe assembly 5 and can be delivered from the connector 321 to the side space of the moving frame 32. Then, it enters the inner liner 35 through the telescopic pipe 36 and comes into contact with the heater to complete the heating of the airflow. In addition, the telescopic pipe 36 can extend and retract in the vertical direction, which can ensure the smooth delivery of airflow when the moving frame 32 moves up and down.

[0041] In a further embodiment, the specific structure of the disclosed subject 61 is described with reference to... Figure 2 , Figure 7 and Figure 9 The top of the main body 61 of the return air box 6 is provided with a pipe 611. The radius of the pipe 611 is equal to the width of the boss 83. A filter is connected to the outside of the pipe 611. In the second stage, when the top of the boss 83 presses against the pipe 611, it does not completely block the pipe 611. This allows hot air to be drawn from the moving frame 32 through the open side hole 62, thus achieving smooth recovery of the hot airflow. At the same time, before the hot airflow is reused, it is sent to the filter for purification and then sent to the inlet of the air supply duct group 5 to complete the recycling.

[0042] In a further embodiment, a specific configuration of the partition 34 is disclosed, referring to... Figure 11The partition 34 includes a sliding plate 341 and a sliding plate 342. The bottom of the inner liner 35 is equipped with a sliding rail 347 that is slidably connected to the top of the sliding plate 341. The bottom of the moving frame 32 is equipped with a sliding rail 345 that is slidably connected to the bottom of the sliding plate 342. The bottom of the sliding plate 341 is equipped with a dovetail pin 3411. The sliding plate 342 is provided with a dovetail groove 3421 corresponding to the dovetail pin 3411. The partition 34 is designed to be a separate sliding plate 341 and sliding plate 342, which are slidably engaged by the dovetail pin 3411 and the dovetail groove 3421 to form a whole with a variable length. With this design, when the position between the moving frame 32 and the inner liner 35 changes, the length of the partition 34 can also be extended and retracted at the same time as the angle changes, so that the movement of the moving frame 32 can be smoother and the resistance of position change can be reduced.

[0043] In a further embodiment, to achieve angle control of slide plate one 341 and slide plate two 342, refer to Figure 8 , Figure 10 and Figure 11 The slide rails 345 and 347 are divided into three equal sections, with stops 346 and 348 respectively. A spring 343 is installed between the top of slide 341 and the inner wall of the middle section of slide 347, and a spring 344 is installed between the bottom of slide 342 and the inner wall of the end of slide 345. Before the moving frame 32 descends, the bottom of the moving frame 32 and the bottom of the inner liner 35 are in contact. At this time, slides 341 and 342 are horizontal, and springs 343 and 344 are compressed. When the moving frame 32 descends to the first stage, the bottom of the moving frame 32 and the bottom of the inner liner 35 separate by a certain distance. At this time, the originally horizontal slides 341 and 342 will be... The frame is stretched out in a figure-eight shape, with spring 1 343 and spring 2 344 partially released. When the moving frame 32 moves down to the second stage, the bottom of the moving frame 32 and the bottom of the inner liner 35 are separated by a larger distance. At this time, the sliding plates 1 341 and 2 342 are stretched into a vertical position, and spring 1 343 and spring 2 344 are almost fully released. At this time, the stop blocks 1 346 and 2 348 will block the top of the sliding plate 1 341 and the bottom of the sliding plate 2 342 to ensure the stability of the position of the sliding plates 1 341 and 2 342. When the conveyor box 8 needs to continue to move forward, the moving frame 32 will move up and approach the inner liner 35, and spring 1 343 and spring 2 344 will be compressed again.

[0044] In a further embodiment, to improve the heating effect of the outer casing 81 on the element to be heated 82, refer to Figure 6The component to be heated 82 is embedded in the top surface of the outer shell 81. Ribs are provided in the connecting cavity 84 of the outer shell 81 corresponding to the position of the component to be heated 82. A through hole is opened in the middle of the rib. The design of the connecting cavity 84 allows airflow to pass through smoothly, but the effective contact area is small. Multiple ribs are designed inside, and the ribs are made of high thermal conductivity material, which can more efficiently absorb the heat in the hot airflow and transfer it to the component to be heated 82, effectively improving the heating efficiency. In addition, multiple through holes are arranged at equal intervals above and below to reduce the obstruction of the airflow in the horizontal direction, which can further increase the effective contact area and improve the thermal conductivity.

[0045] In a further embodiment, a specific configuration of the lifting frame 7 is disclosed, referring to... Figure 5 The lifting frame 7 includes a frame, a connecting frame, and a lead screw. The frame is symmetrically installed on the vertical inner wall of the fixed frame 31. A guide rod is provided at the edge of the frame. The connecting frame is slidably installed on the middle of the outer side of the guide rod. A lead screw is installed in the middle of the connecting frame through a lead screw sleeve. The connecting frame is fixedly connected to the vertical outer wall of the moving frame 32 and the main body 61. A drive motor is connected to the lower end of the lead screw. The frame consists of two square frames, which are fixed on the inner wall of the fixed frame 31 to provide rigid support for the entire lifting frame 7. A connecting frame is installed in the middle of the frame through the lead screw and the guide rod. The rotation of the drive motor can drive the connecting frame to move up and down, thereby driving the moving frame 32 and the main body 61 to move vertically from both sides, completing a stable vertical movement.

[0046] In a further embodiment, to ensure that the boss 83 can be smoothly inserted into the bottom hole 63, refer to Figure 9 In the design, the width of the lower half of the boss 83 is equal to the width of the bottom hole 63. The vertical sidewall of the upper half of the boss 83 converges towards the centerline, and the width of the upper half of the boss 83 is less than the width of the bottom hole 63. By narrowing the top of the boss 83, the inclined sidewall of the upper half of the boss 83 can play a guiding role. When the main body 61 moves downward, even if there is a partial positional deviation, when the sidewall of the bottom hole 63 presses against the inclined sidewall of the boss 83, the conveyor box 8 can be automatically centered and aligned. Furthermore, after the boss 83 is generally half-inserted into the bottom hole 63 in the first stage, the sidewall of the lower half of the boss 83 can completely block the bottom hole 63, ensuring that the airflow flowing out from the position of the boss 83 can be completely collected by the main body 61.

[0047] In a further embodiment, to further reduce heat loss, refer to Figure 3 and Figure 4Partition boxes 4 are provided on both sides of the fixed frame 31 corresponding to the positions of the conveyor 2. The partition box 4 includes a box body 41. The opening of the box body 41 away from the fixed frame 31 is provided with a movable door. The opening of the box body 41 near the fixed frame 31 is provided with a fan 42. The partition boxes 4 are provided at the normally open positions on both sides of the fixed frame 31. The movable door of the partition box 4 is controllable. It opens when the conveyor box 8 passes and closes when heating and curing. When it is open, the fan 42 works and blows the hot air inside out through the movable door of the partition box 4 to prevent cold air from entering and ensure the temperature inside the fixed frame 31 is stable. At the same time, it prevents external debris from entering and ensures the cleanliness of the internal space.

[0048] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A tooling for heat curing and molding composite parts, characterized in that, include: The conveying assembly includes a conveyor (2) and a conveyor box (8). The belt (21) of the conveyor (2) is arranged in a ring rotation between two drive rollers. The conveyor box (8) includes a shell (81) with a connecting cavity (84). The top of the shell (81) is provided with a heating element (82). The top of the shell (81) is symmetrically provided with a central hole (85) at the long side of the heating element (82). The top of the shell (81) is symmetrically provided with an upward-opening boss (83) at the short side of the heating element (82). A heating box (3) includes a fixed frame (31), an inner liner (35) is installed inside the fixed frame (31), a movable frame (32) is slidably installed on the bottom of the inner liner (35) of the fixed frame (31), an air outlet (33) is provided on the movable frame (32) at the bottom opening of the inner liner (35), a partition (34) is installed between the bottom end of the inner liner (35) and the bottom end of the movable frame (32), and the partition (34) divides the air outlet (33) into two side channels (331) and a middle channel (332); Two return air boxes (6) are symmetrically arranged on both sides of the moving frame (32). The bottom end of the main body (61) of the return air box (6) is provided with a bottom hole (63), and the side hole (62) is provided on the side of the main body (61) facing the moving frame (32). A flap (64) is installed in the side hole (62). In the first stage, the conveyor (2) horizontally pushes the conveyor box (8) below the moving frame (32) and the return air box (6). When the conveyor box (8) is directly below the heating box (3), the moving frame (32) and the return air box (6) are driven to move down by the lifting frame (7). The boss (83) is inserted into the main body (61) through the bottom hole (63). The flip plate (64) closes the side hole (62) and the two partitions (34) are in an octagonal shape to separate the side channel (331) and the middle channel (332). In the second stage, the moving frame (32) and the return air box (6) are driven to move down further by the lifting frame (7). At this time, the top of the boss (83) abuts against the bottom of the pipe (611). The flip plate (64) opens the side hole (62) and the partitions (34) are in a vertical state to separate the side channel (331) and the middle channel (332).

2. The composite material heating and curing molding tooling according to claim 1, characterized in that, It also includes a frame (1), which is rotatably connected to the two drive rollers. A support plate (22) is provided in the middle of the belt (21). The support plate (22) is used to support the bottom surface of the upper belt (21). The support plate (22) is fixedly connected to the frame (1).

3. The composite part heating and curing molding tooling according to claim 2, characterized in that, The moving frame (32) has a connector (321) on its vertical side wall. The connector (321) is connected to an air supply pipe assembly (5). The inner liner (35) has a heater inside. The inlet of the inner liner (35) is connected to the side space of the moving frame (32) through a telescopic pipe (36). The side space is connected to the connector (321) and is isolated from the air outlet (33).

4. The composite part heating and curing molding tooling according to claim 3, characterized in that, The return air box (6) has a pipe (611) at the top of its main body (61), the radius of which is equal to the width of the boss (83), and a filter is connected to the outside of the pipe (611).

5. The composite part heating and curing molding tooling according to claim 1, characterized in that, The partition (34) includes a sliding plate one (341) and a sliding plate two (342). The bottom end of the inner liner (35) is equipped with a sliding rail two (347) that is slidably connected to the top end of the sliding plate one (341). The bottom end of the moving frame (32) is equipped with a sliding rail one (345) that is slidably connected to the bottom end of the sliding plate two (342). The bottom end of the sliding plate one (341) is equipped with a dovetail pin (3411). The sliding plate two (342) is provided with a dovetail groove (3421) corresponding to the dovetail pin (3411).

6. The composite part heating and curing molding tooling according to claim 5, characterized in that, The slide rail 1 (345) and slide rail 2 (347) are respectively provided with a stop block 1 (346) and a stop block 2 (348) at the three equal divisions. A spring 1 (343) is installed between the top of the slide plate 1 (341) and the inner wall of the middle part of the slide rail 2 (347). A spring 2 (344) is installed between the bottom of the slide plate 2 (342) and the inner wall of the end of the slide rail 1 (345).

7. The composite part heating and curing molding tooling according to claim 1, characterized in that, The element to be heated (82) is embedded on the top surface of the outer shell (81). A rib is provided in the communicating cavity (84) of the outer shell (81) corresponding to the position of the element to be heated (82). A through hole is provided in the middle of the rib.

8. The composite part heating and curing molding tooling according to claim 1, characterized in that, The lifting frame (7) includes a frame, a connecting frame and a lead screw. The frame is symmetrically installed on the vertical inner wall of the fixed frame (31). A guide rod is provided at the edge of the frame. A connecting frame is slidably installed on the middle of the outer side of the guide rod. A lead screw is installed in the middle of the connecting frame through a lead screw sleeve. The connecting frame is fixedly connected to the vertical outer wall of the moving frame (32) and the main body (61). A drive motor is connected to the lower end of the lead screw.

9. The composite part heating and curing molding tooling according to claim 1, characterized in that, The width of the lower half of the boss (83) is equal to the width of the bottom hole (63), the vertical sidewall of the upper half of the boss (83) converges towards the center line, and the width of the upper half of the boss (83) is less than the width of the bottom hole (63).

10. The composite part heating and curing molding tooling according to claim 1, characterized in that, The fixed frame (31) is provided with partition boxes (4) on both sides corresponding to the positions of the conveyor (2). The partition box (4) includes a box body (41). The box body (41) has an opening on the side away from the fixed frame (31) with a movable door, and the box body (41) has an opening on the side close to the fixed frame (31) with a fan (42).

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