Carbon fiber material extrusion molding die and method

Abstract

The application belongs to the technical field of carbon fiber material, especially carbon fiber material extrusion forming die and method, aiming at the difficulty of impurity removal, the lack of precision in cutting off excess material, the following scheme is proposed, the carbon fiber material extrusion forming die comprises a workbench, the top end of the workbench is fixedly connected with a plurality of sliding columns, the outer side of the sliding column is movably connected with a lower pressing plate, the bottom end of the lower pressing plate is fixedly connected with an extrusion column, the top end of the extrusion column is fixedly connected with an extrusion plate, the lower side of the extrusion plate is provided with an extrusion die, the two sides of the extrusion die are provided with symmetrical cleaning and cutting components, a rectangular hole is formed in the inside of the workbench, and a constant temperature component is arranged in the inside of the rectangular hole. The carbon fiber material extrusion forming die and method disclosed by the application has the advantages of rapid impurity removal, avoidance of the influence of impurities on the quality of carbon fiber products, provision of a good die environment for precise extrusion, accurate cutting off of excess material, and guarantee of product size precision and appearance quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of carbon fiber material, in particular to a carbon fiber material extrusion forming die and method. BACKGROUND

[0002] ‌The carbon fiber material extrusion forming die is a die for manufacturing carbon fiber reinforced plastic products, mainly used for curing and forming carbon fiber composite materials by heating and pressing; such die is usually made of carbon fiber composite material, has the advantages of light weight, high strength, high precision, wear resistance and corrosion resistance, etc.

[0003] The existing device is difficult to effectively remove impurities, so that the impurities continue to interfere with the quality of carbon fiber products, and cannot create good die conditions for precise extrusion, and there is no precision when cutting off excess material, resulting in chaotic product size and poor appearance. SUMMARY

[0004] The present application discloses a carbon fiber material extrusion forming die and method, aiming to solve the technical problems of impurity removal difficulty in the background art, inability to provide good die conditions for precise extrusion, lack of precision in cutting off excess material, and resulting in chaotic product size and poor appearance.

[0005] The carbon fiber material extrusion forming die provided by the present application comprises a workbench, a plurality of sliding columns are fixedly connected to the top end of the workbench, a lower pressing plate is movably connected to the outer side of each sliding column, an extrusion column is fixedly connected to the bottom end of the lower pressing plate, an extrusion plate is fixedly connected to the top end of the extrusion column, an extrusion die is arranged below the extrusion plate, symmetrical cleaning and cutting assemblies are arranged on both sides of the extrusion die, a rectangular hole is formed in the inside of the workbench, and a constant temperature assembly is arranged in the inside of the rectangular hole.

[0006] The cleaning and cutting assembly comprises an arc-shaped cutter, an arc-shaped air tank is arranged above the arc-shaped cutter, and a plurality of air spray heads are arranged on the outer side of the arc-shaped air tank, above the extrusion die.

[0007] The constant temperature assembly comprises a temperature plate, a plurality of heat dissipation heads are fixedly connected to the bottom of the temperature plate, and a temperature sensor is arranged on the outer side of each heat dissipation head.

[0008] In a preferred scheme, the cleaning and cutting assembly further comprises a fixing frame, the inner side of the fixing frame is fixedly connected with an electric telescopic rod, the front end of the electric telescopic rod is provided with a limiting frame, a circular hole is formed in the side of the limiting frame close to the electric telescopic rod, and the electric telescopic rod is movably connected between the inside of the circular hole, the inner side of the limiting frame is fixedly connected with symmetrical connecting rods, the front end of the electric telescopic rod is fixedly connected with a sliding piece, the inner side of the bottom end of the sliding piece and the outer side of the connecting rod are movably connected, and the top end of the sliding piece is fixedly connected with a connecting frame, the front end of the connecting frame is fixedly connected with a connecting piece, the connecting piece is provided with a telescopic electric rod, the bottom end of the telescopic electric rod is fixedly connected with a bottom frame, the bottom frame is below the connecting piece, the bottom end of the bottom frame and the top end of the arc-shaped cutter are fixedly connected, the outer side of the arc-shaped cutter and the inner side of the extrusion die are in contact, and the front end of the connecting piece and the side of the arc-shaped air tank close to the telescopic electric rod are fixedly connected, the top end of the arc-shaped air tank is fixedly connected with a gas inlet head, the top end of the gas inlet head is fixedly connected with a gas conveying pipe, and one end of the gas conveying pipe close to the electric telescopic rod is fixedly connected with a gas pump.

[0009] By setting the cleaning and cutting assembly, before and after the carbon fiber material is extruded, before extrusion, the electric telescopic rod starts to work and extends forward, since the electric telescopic rod is movably connected in the circular hole of the limiting frame, in the process of extension, the electric telescopic rod drives the sliding piece to slide forward along the symmetrical connecting rods in the inner side of the limiting frame, when the sliding piece slides forward, the connecting frame fixedly connected with the top end of the sliding piece moves forward, the connecting frame drives the connecting piece at the front end to move forward, the gas is conveyed to the gas inlet head through the gas conveying pipe, so that the arc-shaped air tank is filled with gas, the gas is sprayed from the multiple gas nozzles on the outer side of the arc-shaped air tank to clean the upper side of the extrusion die, remove possible impurities and the like, and prepare for the placement of the carbon fiber material, after cleaning, the electric telescopic rod returns to the original position, the cleaning and cutting assembly is on the outer side of the extrusion plate, and then the carbon fiber material is extruded, the electric telescopic rod moves again, the telescopic electric rod on the connecting piece starts to work and extends downward, drives the bottom frame fixedly connected with the bottom end to move downward, the bottom frame drives the arc-shaped cutter connected therewith to move downward until the outer side of the arc-shaped cutter contacts the inner side of the extrusion die, under the control of the electric telescopic rod and the telescopic electric rod, the arc-shaped cutter moves downward along the profile of the inner side of the extrusion die to cut the excess carbon fiber material after extrusion and separate it from the formed carbon fiber product, after cutting, the telescopic electric rod retracts to lift the arc-shaped cutter upward and separate it from the extrusion die, in the process, the impurities can be quickly and effectively removed to avoid mixing of the impurities into the carbon fiber material to affect the product quality, provide a good die environment for the precise extrusion of the carbon fiber material, and simultaneously realize the precise cutting of the excess carbon fiber material to ensure the size precision and appearance quality of the product.

[0010] In a preferred scheme, the two sides of the workbench are fixedly connected with extension tables, the top ends of the extension tables are fixedly connected with air pump frames, the inner sides of the air pump frames are fixedly connected with the outer sides of air pump machines, the bottom ends of the fixed frames are fixedly connected with the top ends of the extension tables, the top ends of the sliding columns are fixedly connected with top plates, the bottom ends of the top plates are fixedly connected with a plurality of auxiliary round rods, a plurality of holes are formed in the extrusion plate, the auxiliary round rods are movably connected between the holes, the bottom ends of the auxiliary round rods are fixedly connected with bases, the opposite sides of the bases are fixedly connected with the two sides of the workbench, the top end of the workbench is fixedly connected with a work plate, the temperature plate is located above the work plate, and the rectangular hole is located below the work plate.

[0011] In a preferred scheme, the thermostat assembly further comprises a thermostat frame, the outer side of the thermostat frame is fixedly connected with the inner side of the rectangular hole, the inner bottom end of the thermostat frame is fixedly connected with symmetrical retaining frames, the inner sides of the retaining frames are fixedly connected with heaters, the outer sides of the heaters are fixedly connected with hot gas separation delivery heads, the outer sides of the hot gas separation delivery heads are fixedly connected with a plurality of delivery pipes, the top ends of the delivery pipes are fixedly connected with the bottom ends of the heat dissipation heads located on the two sides, the outer sides of the delivery pipes are movably connected with retaining cylinders, the outer sides of the retaining cylinders are fixedly connected with mounting frames, the bottom ends of the mounting frames are fixedly connected with the inner bottom end of the thermostat frame, the outer sides of the hot gas separation delivery heads are fixedly connected with a plurality of vertical pipes, the top ends of the vertical pipes are fixedly connected with the bottom ends of the heat dissipation heads located in the middle, the outer sides of the vertical pipes and the delivery pipes are fixedly connected with fixed plates, the bottom ends of the temperature sensors are fixedly connected with the top ends of the fixed plates, the top ends of the temperature sensors are fixedly connected with symmetrical detection needles, the detection needles are located on the two sides of the heat dissipation heads, the top ends of the detection needles are in contact with the bottom end of the temperature plate, the bottom end of the temperature plate is fixedly connected with a plurality of external cylinders, and the heat dissipation heads, the temperature sensors and the detection needles are located in the inner sides of the external cylinders, a plurality of perforations are formed in the work plate, and the outer sides of the external cylinders are fixedly connected with the inner sides of the perforations.

[0012] By setting the thermostat assembly, the extrusion die is heated before the carbon fiber material is extruded, the heater in the thermostat assembly is started, the heater starts to work and generates heat, the heat is distributed through the hot gas separation delivery head, part of the heat is transmitted to the heat dissipation head on both sides below the temperature plate through the multiple delivery pipes fixedly connected outside the hot gas separation delivery head, the retention cylinder plays a role in fixing and stabilizing the delivery pipe when the hot gas flows in the delivery pipe, the mounting frame connects the retention cylinder with the thermostat frame, ensuring the stability of the entire delivery structure, the other part of the heat is transmitted to the heat dissipation head in the middle below the temperature plate through the multiple vertical pipes outside the hot gas separation delivery head, the heat dissipation head obtains heat and transmits the heat to the temperature plate, the temperature plate evenly radiates the heat to the extrusion die, preheats the extrusion die, and makes the die reach a temperature suitable for the extrusion of the carbon fiber material, in the process of extruding the carbon fiber material, the temperature sensor starts to work, the symmetrical detection needles at the top end of the temperature sensor contact the bottom end of the temperature plate, and the temperature of the temperature plate is monitored in real time, the temperature sensor feeds back the monitored temperature data to the control system, if the temperature is higher than the set thermostat value, the control system will appropriately reduce the power of the heater to reduce the generation of heat, and at the same time, the heat dissipation head will also speed up the heat dissipation speed to make the temperature drop to the set value, if the temperature is lower than the set thermostat value, the control system will increase the power of the heater to generate more heat, which is transmitted to the heat dissipation head through the delivery pipe and the vertical pipe, and then the temperature of the temperature plate rises to the set thermostat value, in the whole extrusion process, the temperature sensor continuously monitors the temperature, and the control system continuously adjusts the power of the heater and the heat dissipation of the heat dissipation head, so as to ensure the stability of the temperature of the temperature plate, thereby maintaining the constant temperature of the inside of the extrusion die, providing a stable temperature environment for the extrusion forming of the carbon fiber material, and ensuring the product quality, in the process, by accurately controlling the temperature of the extrusion die, the carbon fiber material can be extruded and formed in a stable temperature environment, and the product defects caused by temperature fluctuation are reduced.

[0013] The use method of the carbon fiber material extrusion forming die, the carbon fiber material extrusion forming die is used, and the use method comprises the following steps:

[0014] Step one, before the carbon fiber material is extruded and formed, the multiple air spray heads outside the arc-shaped air tank of the cutting assembly clean the upper part of the extrusion die, and the impurities existing on the die are removed, the carbon fiber material cleaned is placed on the extrusion die, the lower pressing plate drives the extrusion column and the extrusion plate to move downward, and pressure is applied to the carbon fiber material to make it extruded and formed in the extrusion die;

[0015] Step two, in this process, the thermostat assembly in the rectangular hole in the workbench starts to work, the heat dissipation head below the temperature plate and the temperature sensor outside the temperature plate cooperate to keep the stability of the temperature inside the extrusion die, and ensure that the carbon fiber material can be formed in a suitable temperature environment;

[0016] Step three, when the carbon fiber material is extruded, the cleaning and cutting assembly is operated again, at this time, the arc-shaped cutter cuts the excess carbon fiber material after extrusion, so that the final product reaches the required shape and specifications.

[0017] As can be seen from the above, the carbon fiber material extrusion forming die provided by the application has the advantages of rapid impurity removal, avoiding the influence of impurities on the quality of carbon fiber products, providing a good die environment for precise extrusion, and also precisely cutting off excess material to ensure product size precision and appearance quality. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The overall structure schematic diagram of the carbon fiber material extrusion forming die provided by the application is shown in the figure.

[0019] Figure 2 The workbench structure schematic diagram of the carbon fiber material extrusion forming die provided by the application is shown in the figure.

[0020] Figure 3 The internal structure schematic diagram of the workbench of the carbon fiber material extrusion forming die provided by the application is shown in the figure.

[0021] Figure 4 The structure schematic diagram above the workbench of the carbon fiber material extrusion forming die provided by the application is shown in the figure.

[0022] Figure 5 The cleaning and cutting assembly structure schematic diagram of the carbon fiber material extrusion forming die provided by the application is shown in the figure.

[0023] Figure 6 The partial structure schematic diagram of the cleaning and cutting assembly of the carbon fiber material extrusion forming die provided by the application is shown in the figure.

[0024] Figure 7 The constant temperature assembly structure schematic diagram of the carbon fiber material extrusion forming die provided by the application is shown in the figure.

[0025] Figure 8 The partial structure schematic diagram of the constant temperature assembly of the carbon fiber material extrusion forming die provided by the application is shown in the figure.

[0026] In the figure: 1, workbench; 2, extension table; 3, sliding column; 4, lower pressing plate; 5, air pump frame; 6, top plate; 7, cleaning and cutting assembly; 701, fixing frame; 702, electric telescopic rod; 703, limiting frame; 704, connecting rod; 705, sliding piece; 706, connecting frame; 707, connecting piece; 708, telescopic electric rod; 709, bottom frame; 710, arc-shaped cutter; 711, arc-shaped air tank; 712, air spray head; 713, air connection head; 714, air conveying pipe; 715, air pump machine; 8, extrusion plate; 9, constant temperature assembly; 901, constant temperature frame; 902, retaining frame; 903, heater; 904, hot air separation conveying head; 905, conveying pipe; 906, mounting frame; 907, retaining cylinder; 908, vertical pipe; 909, external connecting cylinder; 910, temperature plate; 911, fixing plate; 912, temperature sensor; 913, probe; 914, heat dissipation head; 10, auxiliary round rod; 11, base; 12, extrusion column; 13, work plate; 14, extrusion die. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0028] The carbon fiber material extrusion forming die disclosed by the present application is mainly applied to the scene that impurities are difficult to remove, interfere with the quality of carbon fiber material extrusion forming, cannot provide good die conditions for precise extrusion, have no precision in cutting off excess material, and cause size disorder and poor appearance.

[0029] Referring to Figures 1-8 , the carbon fiber material extrusion forming die comprises a workbench 1, a plurality of sliding columns 3 are fixedly connected to the top end of the workbench 1, lower pressing plates 4 are movably connected to the outer sides of the sliding columns 3, extrusion columns 12 are fixedly connected to the bottom ends of the lower pressing plates 4, extrusion plates 8 are fixedly connected to the top ends of the extrusion columns 12, extrusion dies 14 are arranged below the extrusion plates 8, symmetrical cleaning and cutting assemblies 7 are arranged on the two sides of the extrusion dies 14, a rectangular hole is formed in the inside of the workbench 1, and a constant temperature assembly 9 is arranged in the inside of the rectangular hole;

[0030] The cleaning and cutting assembly 7 comprises an arc-shaped cutter 710, an arc-shaped air tank 711 is arranged above the arc-shaped cutter 710, and a plurality of air spray heads 712 are arranged on the outer side of the arc-shaped air tank 711, and the air spray heads 712 are all located above the extrusion die 14;

[0031] The constant temperature assembly 9 comprises a temperature plate 910, a plurality of heat dissipation heads 914 are fixedly connected below the temperature plate 910, and temperature sensors 912 are arranged on the outer sides of the heat dissipation heads 914.

[0032] Referring toFigure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The cleaning and cutting component 7 also includes a fixing frame 701. An electric telescopic rod 702 is fixedly connected to the inner side of the fixing frame 701. A limit frame 703 is provided at the front end of the electric telescopic rod 702. A circular hole is opened on the side of the limit frame 703 near the electric telescopic rod 702, and the electric telescopic rod 702 is movably connected within the circular hole. Symmetrical connecting rods 704 are fixedly connected to the inner side of the limit frame 703. A sliding member 705 is fixedly connected to the front end of the electric telescopic rod 702. The inner side of the bottom end of the sliding member 705 is movably connected to the outer side of the connecting rod 704. A connecting frame 706 is fixedly connected to the top end of the sliding member 705, and a connecting member 7 is fixedly connected to the front end of the connecting frame 706. 07. A telescopic electric rod 708 is provided on the connector 707. A base frame 709 is fixedly connected to the bottom end of the telescopic electric rod 708. The base frame 709 is located below the connector 707. The bottom end of the base frame 709 is fixedly connected to the top end of the arc-shaped cutter 710. The outer side of the arc-shaped cutter 710 is in contact with the inner side of the extrusion mold 14. The front end of the connector 707 is fixedly connected to the side of the arc-shaped air box 711 near the telescopic electric rod 708. An air inlet 713 is fixedly connected to the top end of the arc-shaped air box 711. An air supply pipe 714 is fixedly connected to the top end of the air inlet 713. An air pump 715 is fixedly connected to the end of the air supply pipe 714 near the electric telescopic rod 702.

[0033] Specifically, before the carbon fiber material is extruded, the electric telescopic rod 702 extends forward and, due to its movable connection with the circular hole of the limit frame 703, drives the sliding part 705 to slide along the connecting rod 704, thereby causing the connecting frame 706 and the connecting part 707 to move forward. At the same time, the air pump 715 supplies air to the air inlet 713 through the air supply pipe 714, filling the arc-shaped air box 711 with air. The air nozzle 712 sprays air to clean the extrusion mold 14 and remove impurities. After cleaning, the electric telescopic rod 702 returns to its original position, and the assembly is located in... Outside the extrusion plate 8, after the carbon fiber material is extruded and formed, the electric telescopic rod 702 moves again, and the telescopic electric rod 708 on the connector 707 starts to extend downward, driving the base frame 709 and the arc-shaped cutter 710 to move down to contact the inside of the extrusion mold 14. Under the control of the electric telescopic rod 702 and the telescopic electric rod 708, the arc-shaped cutter 710 moves downward along the inner contour of the mold to cut off the excess carbon fiber material after forming. After the cutting is completed, the telescopic electric rod 708 retracts, and the arc-shaped cutter 710 disengages from the mold.

[0034] Electric telescopic pole and its parameters

[0035] Electric telescopic rod 702: The thrust is set to 800-1200N, which can meet the power requirements of cleaning and cutting actions before and after carbon fiber extrusion, ensuring that the arc-shaped air box moves accurately to the cleaning position and the arc-shaped cutter is stably attached to the inside of the mold; the stroke range is 150-200mm, which can adapt to the distance between the worktable and the extension table, and can cover the cleaning area above the extrusion mold and the cutting path inside the mold; the speed control adopts a step adjustment method, with the cleaning stage speed at 50-80mm / s to avoid excessive airflow disturbance affecting the impurity removal effect, and the cutting stage speed reduced to 20-30mm / s to ensure the cutting accuracy of the cutter.

[0036] Telescopic electric rod 708: The thrust is 300-500N, which can drive the arc-shaped cutter 710 to press down smoothly and fit against the inner side of the mold; the stroke is 80-120mm, which meets the movement requirements from the initial position to the cutting position inside the mold; the speed is fixed at 15-25mm / s to prevent the cutter from colliding with the mold or the cutting from being too fast.

[0037] The air pump 715 has an output pressure range of 0.6-0.8MPa, which ensures that the airflow ejected from the air nozzle 712 has sufficient impact force to effectively remove dust, fiber debris and other impurities from the surface of the extrusion die 14. The minimum airflow is 120L / min, which ensures that a stable airflow can be maintained when multiple air nozzles are working at the same time, avoiding incomplete cleaning due to insufficient air volume. The typical cleaning time is 30-60s, which can ensure the cleaning effect without affecting the overall production efficiency.

[0038] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 The workbench 1 is fixedly connected to two sides of an extension platform 2. The top of each extension platform 2 is fixedly connected to an air pump frame 5. The inner side of the air pump frame 5 is fixedly connected to the outer side of the air pump 715. The bottom of the fixed frame 701 is fixedly connected to the top of the extension platform 2. The top of the sliding column 3 is fixedly connected to a top plate 6. The bottom of the top plate 6 is fixedly connected to multiple auxiliary round rods 10. Multiple holes are opened on the extrusion plate 8. The auxiliary round rods 10 are movably connected to the inside of the holes. The bottom of each auxiliary round rod 10 is fixedly connected to a base 11. The opposite side of the base 11 is fixedly connected to both sides of the workbench 1. The top of the workbench 1 is fixedly connected to a work plate 13. The temperature plate 910 is located above the work plate 13. The rectangular hole is located below the work plate 13.

[0039] Reference Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8The temperature control component 9 also includes a temperature control frame 901. The outer side of the temperature control frame 901 is fixedly connected to the inner side of the rectangular hole. Symmetrical retaining frames 902 are fixedly connected to the bottom inner side of the temperature control frame 901. Heaters 903 are fixedly connected to the inner sides of each retaining frame 902. A hot gas separation conveying head 904 is fixedly connected to the outer side of each heater 903. Multiple conveying pipes 905 are fixedly connected to the outer side of each hot gas separation conveying head 904. The top end of each conveying pipe 905 is fixedly connected to the bottom end of a heat dissipation head 914 located on both sides. A retaining cylinder 907 is movably connected to the outer side of each conveying pipe 905. A mounting bracket 906 is fixedly connected to the outer side of each retaining cylinder 907. The bottom end of the mounting bracket 906 is fixedly connected to the inner bottom end of the temperature control frame 901. A heat separation conveying head 904 is fixedly connected to the outer side of each heat dissipation head 904. Multiple vertical tubes 908 are fixedly connected, with the top of each vertical tube 908 being fixedly connected to the bottom of the central heat sink 914. A fixing plate 911 is fixedly connected to the outer sides of both the vertical tubes 908 and the conveying pipe 905. The bottom of the temperature sensor 912 is fixedly connected to the top of the fixing plate 911. Symmetrical probes 913 are fixedly connected to the top of the temperature sensor 912. The probes 913 are located on both sides of the heat sink 914, with the top of each probe contacting the bottom of the temperature plate 910. Multiple external cylinders 909 are fixedly connected to the bottom of the temperature plate 910, with the heat sink 914, temperature sensor 912, and probes 913 all located inside the external cylinders 909. Multiple through holes are provided on the working plate 13, with the outer sides of the external cylinders 909 and the inner sides of the through holes fixedly connected.

[0040] Specifically, before the carbon fiber material is extruded, the heater 903 of the constant temperature component 9 is activated. The heat is diverted through the hot gas separation conveyor head 904, and then transferred to the heat dissipation head 914 through the conveying pipe 905 and the vertical pipe 908. Finally, the heat is dissipated to the extrusion die 14 by the temperature plate 910 to complete the preheating. During the extrusion process, the temperature sensor 912 monitors the temperature of the temperature plate 910 in real time and feeds it back to the control system. The system adjusts the power of the heater 903 and the heat dissipation rate of the heat dissipation head 914 according to the difference between the temperature and the set value to ensure that the die temperature is constant and to ensure product quality.

[0041] Temperature control parameters of constant temperature component

[0042] Temperature setting: Based on the molding characteristics of carbon fiber materials (such as T700 grade carbon fiber composites), the typical temperature setting value of the temperature control system is 120-160℃. This temperature range can ensure that the material is fully cured and will not degrade in performance due to excessive temperature.

[0043] Sensor accuracy: The temperature sensor 912 uses a PT100 platinum resistance sensor with an accuracy of ±0.5℃, which can accurately monitor the temperature changes of the temperature plate 910 and provide reliable data support for temperature control.

[0044] Temperature control algorithm: Employing a PID (Proportional-Integral-Derivative) control algorithm, when the temperature sensor detects a temperature deviation from the set value, the control system can quickly calculate the deviation and adjust the heater power. For example, when the temperature is 1°C below the set value, the heater power increases by 10%-15%; when the temperature is 1°C above the set value, the heater power decreases by 10%-15%, while the heat sink 914 accelerates heat dissipation, ensuring that temperature fluctuations are controlled within ±2°C, achieving a stable constant temperature environment.

[0045] (a) Curved tool materials

[0046] The 710 curved cutting tool is made of cemented carbide (such as WC-Co cemented carbide with a cobalt content of 8%-12%), with a lower limit of hardness set at HRA88. It has the characteristics of high hardness and high wear resistance, and can effectively cut carbon fiber materials. It avoids the problem of tool wear leading to a decrease in cutting accuracy during long-term use, and its service life can reach more than 5,000 cutting operations.

[0047] (ii) Materials for temperature plates and heat sinks

[0048] Temperature plate 910: Made of oxygen-free copper with a thermal conductivity of 401W / (m•K), it can quickly and evenly transfer heat to ensure that the temperature of each area of ​​the extrusion die 14 is consistent, and avoid product molding defects caused by local temperature differences.

[0049] Heat sink 914: Made of 6061 aluminum alloy with a thermal conductivity of 155W / (m•K), it combines good thermal conductivity with lightweight characteristics. It can efficiently transfer the heat generated by the heater to the temperature plate, while also being easy to install and maintain.

[0050] (III) Heater type and power

[0051] The heater 903 uses a tubular electric heater with a power of 2000-3000W. It can quickly generate heat to meet the temperature plate's requirement to rise to the set temperature. It also has high heating efficiency and low energy consumption, and is compatible with the overall design of the constant temperature component. (I) Specific Implementation Examples

[0053] Taking the extrusion molding of T700 grade carbon fiber composites as an example, the complete process and key data are as follows:

[0054] Cleaning stage: Start the air pump 715, output pressure 0.7MPa, air flow 150L / min, and use the air nozzle 712 to clean the area above the extrusion die 14 for 45 seconds. After cleaning, the amount of impurities remaining on the die surface is <0.1mg / cm².

[0055] Extrusion stage: Carbon fiber material is placed on the extrusion die. The lower pressure plate 4 drives the extrusion column 12 and extrusion plate 8 to move downwards, applying a pressure of 5 MPa. At the same time, the constant temperature component is activated, and the temperature is set to 140℃. Through a PID control algorithm, the temperature fluctuation range is controlled within 139-141℃. The extrusion duration is 10 minutes, and the material is completely cured and formed.

[0056] Cutting stage: The electric telescopic rod 702 moves at a speed of 25 mm / s, the telescopic electric rod 708 presses down at a speed of 20 mm / s, and the arc-shaped cutter 710 cuts against the inner side of the mold. The dimensional deviation of the product after cutting is ±0.05 mm, which meets the high precision requirements.

[0057] (II) Comparison of experimental data

[0058] A comparative experiment was conducted between the mold of the present invention and a traditional mold without cleaning or temperature control functions. The results are shown in the table below:

[0059]

[0060] The data shows that the present invention significantly improves product quality, dimensional accuracy, and surface cleanliness through the synergistic effect of the cleaning component and the constant temperature component, fully verifying the effectiveness of the technical solution.

[0061] (a) Temperature control system control logic

[0062] Temperature sensor 912 collects temperature data from temperature plate 910 in real time and transmits the data to PLC (Programmable Logic Controller) control system via RS485 communication interface. The control system compares the collected temperature value with the set temperature value. If the temperature is lower than the set value, the PLC outputs a signal to increase the power supply voltage of heater 903, increasing heating power; if the temperature is higher than the set value, the PLC outputs a signal to decrease the power supply voltage of heater and simultaneously controls the cooling fan speed of heat sink 914 to increase heat dissipation. The entire adjustment process has a response time of less than 1 second, ensuring that the temperature quickly returns to the set range.

[0063] (ii) Electrical connection relationship

[0064] Temperature sensor and control system: It adopts RS485 communication interface connection with a transmission rate of 9600bps. The data transmission is stable and has strong anti-interference ability, which can ensure accurate transmission of temperature data.

[0065] Heater and control system: Connected via solid-state relays, the control signals output by the PLC trigger the solid-state relays to switch on and off, thereby regulating the power supply to the heater and controlling the heating power, avoiding circuit damage caused by directly controlling high-power equipment.

[0066] Electric telescopic pole, telescopic electric pole and control system: It adopts pulse signal control. The PLC outputs pulse signals to the motor driver, and the driver controls the motor to operate, realizing the speed and stroke control of the telescopic pole with an accuracy of up to 0.01mm.

[0067] The method of using a carbon fiber extrusion molding die, as described above, includes the following steps:

[0068] Step 1: Before the carbon fiber material is extruded, the multiple air nozzles 712 on the outside of the arc-shaped air box 711 of the component 7 are cleaned to clean the upper part of the extrusion mold 14, removing impurities and other impurities on the mold. The cleaned carbon fiber material is placed on the extrusion mold 14, and the lower pressure plate 4 drives the extrusion column 12 and the extrusion plate 8 to move downward, applying pressure to the carbon fiber material so that it is extruded and formed in the extrusion mold 14.

[0069] Step 2: During this process, the thermostatic component 9 located in the rectangular hole inside the workbench 1 starts to work. The heat sink 914 below the temperature plate 910 and the temperature sensor 912 on the outside work together to maintain the stability of the internal temperature of the extrusion mold 14, ensuring that the carbon fiber material can be formed in a suitable temperature environment.

[0070] Step 3: After the carbon fiber material is extruded and formed, the cleaning and cutting component 7 operates again. At this time, the arc-shaped cutter 710 cuts off the excess carbon fiber material after extrusion and forming, so that the final product reaches the required shape and specifications.

[0071] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A carbon fiber extrusion molding die, comprising a worktable (1), characterized in that, The top of the workbench (1) is fixedly connected to a plurality of sliding columns (3), and the outer side of each sliding column (3) is movably connected to a lower pressure plate (4). The bottom end of the lower pressure plate (4) is fixedly connected to an extrusion column (12), and the top end of the extrusion column (12) is fixedly connected to an extrusion plate (8). An extrusion mold (14) is provided below the extrusion plate (8). Symmetrical cleaning and cutting components (7) are provided on both sides of the extrusion mold (14). A rectangular hole is opened inside the workbench (1), and a constant temperature component (9) is provided inside the rectangular hole. The cleaning and cutting assembly (7) includes an arc-shaped cutter (710), an arc-shaped air box (711) is provided above the arc-shaped cutter (710), and multiple air nozzles (712) are provided on the outside of the arc-shaped air box (711), all of which are located above the extrusion die (14). The constant temperature component (9) includes a temperature plate (910), and multiple heat sinks (914) are fixedly connected to the bottom of the temperature plate (910), and temperature sensors (912) are provided on the outer side of each heat sink (914). The cleaning and cutting assembly (7) also includes a fixing frame (701), an electric telescopic rod (702) is fixedly connected to the inner side of the fixing frame (701), a limit frame (703) is provided at the front end of the electric telescopic rod (702), a round hole is provided on the side of the limit frame (703) near the electric telescopic rod (702), and the electric telescopic rod (702) is movably connected inside the round hole, and symmetrical connecting rods (704) are fixedly connected to the inner side of the limit frame (703). The constant temperature assembly (9) also includes a constant temperature frame (901). The outer side of the constant temperature frame (901) is fixedly connected to the inner side of the rectangular hole. A symmetrical retaining frame (902) is fixedly connected to the bottom inner side of the constant temperature frame (901). A heater (903) is fixedly connected to the inner side of each retaining frame (902). A hot gas separation conveying head (904) is fixedly connected to the outer side of each heater (903). Multiple conveying pipes (905) are fixedly connected to the outer side of each hot gas separation conveying head (904). The top end of each conveying pipe (905) is fixedly connected to the bottom end of each heat dissipation head (914) located on both sides.

2. The carbon fiber extrusion die according to claim 1, characterized in that, The front end of the electric telescopic rod (702) is fixedly connected to a sliding member (705). The inner side of the bottom end of the sliding member (705) is movably connected to the outer side of the connecting rod (704). The top end of the sliding member (705) is fixedly connected to a connecting frame (706). The front end of the connecting frame (706) is fixedly connected to a connecting member (707). A telescopic electric rod (708) is provided on the connecting member (707).

3. The carbon fiber extrusion die according to claim 2, characterized in that, The bottom end of the telescopic electric rod (708) is fixedly connected to a base frame (709), which is located below the connector (707). The bottom end of the base frame (709) is fixedly connected to the top end of the arc-shaped cutter (710). The outer side of the arc-shaped cutter (710) is in contact with the inner side of the extrusion mold (14). The front end of the connector (707) is fixedly connected to the side of the arc-shaped air box (711) near the telescopic electric rod (708). The top end of the arc-shaped air box (711) is fixedly connected to an air inlet (713), and the top end of the air inlet (713) is fixedly connected to an air supply pipe (714). The end of the air supply pipe (714) near the electric telescopic rod (702) is fixedly connected to an air pump (715).

4. The carbon fiber extrusion die according to claim 1, characterized in that, The workbench (1) is fixedly connected to both sides of an extension platform (2), and the top of the extension platform (2) is fixedly connected to an air pump frame (5). The inner side of the air pump frame (5) is fixedly connected to the outer side of the air pump (715), and the bottom end of the fixed frame (701) is fixedly connected to the top of the extension platform (2). The top of the sliding column (3) is fixedly connected to a top plate (6).

5. The carbon fiber extrusion die according to claim 4, characterized in that, The bottom end of the top plate (6) is fixedly connected to a plurality of auxiliary round rods (10), and the extrusion plate (8) is provided with a plurality of holes. The auxiliary round rods (10) are all movably connected to each other inside the holes. The bottom end of the auxiliary round rods (10) is fixedly connected to a base (11), and the opposite side of the base (11) is fixedly connected to both sides of the workbench (1). The top of the workbench (1) is fixedly connected to a work plate (13), the temperature plate (910) is located above the work plate (13), and the rectangular hole is located below the work plate (13).

6. The carbon fiber extrusion die according to claim 1, characterized in that, The outer side of each conveying pipe (905) is movably connected to a retaining cylinder (907), and the outer side of each retaining cylinder (907) is fixedly connected to a mounting bracket (906). The bottom end of the mounting bracket (906) is fixedly connected to the inner side of the bottom end of the constant temperature rack (901). The outer side of each hot gas separation conveying head (904) is fixedly connected to multiple vertical pipes (908), and the top end of each vertical pipe (908) is fixedly connected to the bottom end of the heat dissipation head (914) located in the middle. The outer side of each vertical pipe (908) and conveying pipe (905) is fixedly connected to a fixing plate (911), and the bottom end of the temperature sensor (912) is fixedly connected to the top end of the fixing plate (911).

7. The carbon fiber extrusion die according to claim 1, characterized in that, The temperature sensor (912) has symmetrical probes (913) fixedly connected to its top end. The probes (913) are located on both sides of the heat sink (914). The top end of the probes (913) is in contact with the bottom end of the temperature plate (910). The bottom end of the temperature plate (910) is fixedly connected to multiple external cylinders (909). The heat sink (914), temperature sensor (912) and probes (913) are all located inside the external cylinders (909). Multiple perforations are opened on the working plate (13). The outer side of the external cylinders (909) and the inner side of the perforations are fixedly connected.

8. A method for using a carbon fiber extrusion molding die, wherein the carbon fiber extrusion molding die is used as described in claim 7, characterized in that... Includes the following steps: Step 1: Before the carbon fiber material is extruded, clean the multiple air nozzles (712) on the outside of the arc-shaped air box (711) of the cut-off component (7) to clean the top of the extrusion mold (14), remove impurities on the mold, place the cleaned carbon fiber material on the extrusion mold (14), and the lower pressure plate (4) drives the extrusion column (12) and extrusion plate (8) to move downward, apply pressure to the carbon fiber material, and extrude it into shape in the extrusion mold (14); Step 2: During this process, the thermostatic component (9) located in the rectangular hole inside the workbench (1) starts to work. The heat sink (914) below the temperature plate (910) and the temperature sensor (912) on the outside work together to maintain the stability of the internal temperature of the extrusion mold (14) and ensure that the carbon fiber material can be formed in a suitable temperature environment. Step 3: After the carbon fiber material is extruded and formed, the cleaning and cutting component (7) operates again. At this time, the arc-shaped cutter (710) cuts off the excess carbon fiber material after extrusion and forming, so that the final product reaches the required shape and specifications.

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