Preparation method of flame-retardant environment-friendly carbon fiber board

Abstract

The invention provides a preparation method of a flame-retardant environment-friendly carbon fiber board, and belongs to the technical field of board preparation. The problem of poor stability in the prior art is solved. The preparation method of the flame-retardant environment-friendly carbon fiber board comprises the following steps: A, preparation: preparing bamboo charcoal powder and resin master batch for later use; b, proportioning: mixing the bamboo charcoal powder and the resin master batch according to a mass ratio of 6: 4 to obtain a material; and C, melting. The preparation method of the flame-retardant environment-friendly carbon fiber board is high in stability.

Description

Technical Field

[0001] The present invention belongs to the technical field of sheet preparation, and relates to a preparation method of a flame-retardant and environment-friendly carbon fiber board. Background Art

[0002] The flame-retardant and environment-friendly carbon fiber board is usually directly formed by putting raw materials into a forming mold according to a set ratio.

[0003] Since the above raw materials are not properly heated during the pressing process, the strength of the finished carbon fiber board is limited. Although it has good flame retardancy and environmental protection performance, the carbon fiber board is prone to breakage under the action of a relatively large external force, and its stability is relatively poor. Summary of the Invention

[0004] The purpose of the present invention is to provide a preparation method of a flame-retardant and environment-friendly carbon fiber board with high operation efficiency for the above problems existing in the prior art.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A preparation method of a flame-retardant and environment-friendly carbon fiber board, characterized in that the preparation method includes the following steps:

[0007] A. Preparation: Prepare bamboo charcoal powder and resin masterbatch;

[0008] B. Ratio: Mix the above bamboo charcoal powder and resin masterbatch according to a mass ratio of 6:4 to obtain a material;

[0009] C. Melting: Feed the above material into a screw extruder, and the viscous material output by the screw extruder enters the forming die. The forming die prepares it into a semi-finished product in the shape of a long plate, and at the same time, the forming die cuts the semi-finished product, and a carbon fiber board with set length and width dimensions is obtained after cutting.

[0010] In the above preparation method of the flame-retardant and environment-friendly carbon fiber board, the forming die includes a frame, a conveying groove, a forming roller and a motor I. The above conveying groove is fixedly connected to the lower part of the frame, the above forming roller is movably connected to the upper part of the frame, a forming part is formed between the lower part of the forming roller and the conveying groove, and the above motor I is fixedly connected to the frame and the motor I is connected to the forming roller.

[0011] In the above preparation method of the flame-retardant and environment-friendly carbon fiber board, the lower part of the forming roller is located at the conveying groove.

[0012] In the above preparation method of the flame-retardant and environment-friendly carbon fiber board, a plurality of cutting knives are arranged on the outer side of the forming roller along its circumferential direction, and a cutting part for cutting the front part and the rear part of the semi-finished product is formed between two adjacent cutting knives.

[0013] In the above method for preparing a flame-retardant and environmentally friendly carbon fiber board, the forming roller is internally provided with a first electric heating element and a second electric heating element. The first electric heating element is in contact with the forming roller and can raise the temperature of the forming roller to 60 - 70 O °C. The second electric heating element is in contact with the cutting knife and can raise the temperature of the cutting knife to 80 - 85 O °C.

[0014] In the above method for preparing a flame-retardant and environmentally friendly carbon fiber board, the diameter of the forming roller is 5 - 8 meters, and the rotation speed of the forming roller is 4 - 7 revolutions per minute.

[0015] In the above method for preparing a flame-retardant and environmentally friendly carbon fiber board, a third electric heating element is fixedly connected to the bottom of the conveying trough. The third electric heating element is in contact with the conveying trough and can raise the temperature of the conveying trough to 40 - 55 O °C.

[0016] In the above method for preparing a flame-retardant and environmentally friendly carbon fiber board, when the cutting knife rotates with the forming roller to the lowest position, the gap between the cutting knife and the bottom of the conveying trough is 0.5 - 0.8 millimeters.

[0017] In the above method for preparing a flame-retardant and environmentally friendly carbon fiber board, a pre-forming roller and a second motor are also movably connected to the frame. Along the moving direction of the material in the conveying trough, the pre-forming roller is located in front of the forming roller. The second motor is fixedly connected to the frame and the second motor is connected to the pre-forming roller.

[0018] Compared with the prior art, in the method for preparing the flame-retardant and environmentally friendly carbon fiber board, the material that has been extruded by the screw extruder into a viscous state enters the corresponding forming die and is thus quickly formed. Compared with direct pressing, its operation efficiency is relatively high.

[0019] At the same time, during the product forming process by the forming die, the semi-finished product can be formed into a plate shape within a set temperature range and cut off. Therefore, the product qualification rate is relatively high and it has high practical value. Description of the Drawings

[0020] Figure 1 is the forming die used in the method for preparing the flame-retardant and environmentally friendly carbon fiber board.

[0021] In the figure, 1. Frame; 2. Conveying trough; 3. Forming roller; 3a. Cutting knife; 4. First motor; 5. First electric heating element; 7. Second electric heating element; 8. Third electric heating element; 9. Pre-forming roller; 10. Second motor; 11. Screw extruder. Detailed Embodiments

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] It should be noted that when a component is referred to as being "mounted on" another component, it can be directly mounted on the other component or there can also be an intermediate component. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there may be an intermediate component at the same time.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0025] The preparation method of the flame-retardant and environment-friendly carbon fiber board includes the following steps:

[0026] A. Preparation: Prepare bamboo charcoal powder and resin masterbatch for later use;

[0027] B. Ratio: Mix the above-mentioned bamboo charcoal powder and resin masterbatch according to a mass ratio of 6:4 to obtain a material;

[0028] C. Melting: Feed the above-mentioned material into a screw extruder. The viscous material output by the screw extruder enters the forming die. Through the forming die, it is prepared into a semi-finished product in the shape of a long board. At the same time, the forming die cuts the semi-finished product, and after cutting, a carbon fiber board with set length and width dimensions is obtained.

[0029] As Figure 1 shown, the forming die includes a frame 1, a conveying groove 2, a forming roller 3 and a first motor 4. The above-mentioned conveying groove 2 is fixedly connected to the lower part of the frame 1. The above-mentioned forming roller 3 is movably connected to the upper part of the frame 1. A forming part is formed between the lower part of the forming roller 3 and the conveying groove 2. The above-mentioned first motor 4 is fixedly connected to the frame 1 and the first motor 4 is connected to the forming roller 3.

[0030] The material output by the screw extruder 11 is prepared into a finished carbon fiber board in the shape of a board under the action of the forming die.

[0031] Specifically, during the continuous rotation of the first motor 4 driving the forming roller 3, the forming roller 3 extrudes the material in the conveying trough 2, and the extruded material is formed into a long plate shape.

[0032] Of course, since the material is located in the conveying trough 2, the width of the semi-finished product after forming is limited to the width of the conveying trough 2, so the width of the semi-finished product is constant.

[0033] Of course, the rotating forming roller 3 has two functions in the above process:

[0034] First, extrude the material into a long plate shape;

[0035] Second, the rotating forming roller 3 can drive the semi-finished product to stably translate in the conveying trough 2.

[0036] The lower part of the forming roller 3 is located at the conveying trough 2.

[0037] Such a structure can enable the forming roller 3 to stably extrude the material in the conveying trough 2.

[0038] A plurality of cutting knives 3a are provided on the outer side of the forming roller 3 along its circumferential direction, and a cutting part for cutting the front and rear parts of the semi-finished product is formed between two adjacent cutting knives 3a.

[0039] During the rotation of the cutting knife 3a along with the forming roller 3, the cutting knife 3a will cut off the semi-finished product, so as to obtain a finished carbon fiber board with a set length.

[0040] An electric heating element I 5 and an electric heating element II 7 are provided in the forming roller 3. The above-mentioned electric heating element I 5 is in contact with the forming roller and can raise the temperature of the forming roller to 60 O °C. According to the actual situation, it is also feasible that the above temperature is 70 O °C.

[0041] The above-mentioned electric heating element II 7 is in contact with the cutting knife 3a and can raise the temperature of the cutting knife 3a to 80 O °C. According to the actual situation, it is also feasible that the above temperature is 85 O °C.

[0042] The forming roller 3 has an appropriate temperature, and the cutting knife 3a also has an appropriate temperature. The temperature of the cutting knife 3a is higher than that of the forming roller 3, which is convenient for stably cutting off the semi-finished product.

[0043] The diameter of the forming roller 3 is 5 meters. According to the actual situation, it is also feasible that its diameter is 8 meters.

[0044] The rotation speed of the forming roller 3 is 4 revolutions per minute. According to the actual situation, it is also feasible that its rotation speed is 6 revolutions per minute.

[0045] A third electric heating element 8 is fixedly connected to the bottom of the conveying trough 2. The third electric heating element 8 is in contact with the conveying trough 2 and can raise the temperature of the conveying trough 2 to 40 O °C. According to the actual situation, it is also feasible to raise the temperature to 51 O °C.

[0046] When the cutting knife rotates to the lowest position along with the forming roller, the gap between the cutting knife and the bottom of the conveying trough is 0.5 mm. According to the actual situation, it is also feasible that the gap is 0.8 mm.

[0047] Such a structure can ensure that the semi-finished product is stably cut off. At the same time, it can also prevent the cutting knife 3a from touching the conveying trough.

[0048] A pre-forming roller 9 and a second motor 10 are also movably connected to the frame 1. Along the moving direction of the material in the conveying trough 2, the pre-forming roller 9 is located in front of the forming roller 3. The second motor 10 is fixedly connected to the frame 1 and the second motor 10 is connected to the pre-forming roller 9.

[0049] The rotating pre-forming roller 9 can preliminarily form the semi-finished product. The preliminarily formed semi-finished product is finally formed and cut under the action of the forming roller 3.

[0050] In the preparation method of this flame-retardant and environment-friendly carbon fiber board, the material extruded into a viscous state by a screw extruder at noon is quickly formed after entering the corresponding forming die. Compared with direct pressing, its operation efficiency is relatively high.

[0051] At the same time, during the product forming process by the forming die, the semi-finished product can be formed into a plate shape within a set temperature range and cut off. Therefore, the product qualification rate is relatively high and it has high practical value.

[0052] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0053] Those of ordinary skill in the art of this technology should recognize that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. As long as within the spirit of the present invention, appropriate changes and variations made to the above embodiments fall within the scope claimed by the present invention.

Claims

1. A method for preparing a flame retardant and environmentally friendly carbon fiber board, characterized in that: The preparation method comprises the following steps: A. Preparation: Set aside bamboo charcoal powder and resin masterbatch; B. Proportion: The above-mentioned bamboo charcoal powder and resin masterbatch are mixed in a mass ratio of 6:4 to obtain a material; C. Melting: The above materials are fed into a screw extruder. The viscous materials output by the screw extruder enter the forming die, and are prepared into long plate-shaped semi-finished products by the forming die. At the same time, the forming die cuts the semi-finished products to obtain carbon fiber boards of set length and width.

2. The method for preparing the flame-retardant and environment-friendly carbon fiber board according to claim 1, characterized in that: The forming mold includes a frame, a conveying trough, a forming roller and a motor. The conveying trough is fixedly connected to the lower part of the frame, the forming roller is movably connected to the upper part of the frame, a forming part is formed between the lower part of the forming roller and the conveying trough, and the motor is fixedly connected to the frame and connected to the forming roller.

3. The method for preparing the flame-retardant and environment-friendly carbon fiber board according to claim 2, characterized in that: The lower part of the forming roller is located at the conveying trough.

4. The method for preparing the flame-retardant and environment-friendly carbon fiber board according to claim 3, characterized in that: The outer side of the forming roller is provided with a plurality of cutters along its circumference, and a cutting portion for cutting the front and rear portions of the semi-finished product is formed between two adjacent cutters.

5. The method for preparing the flame-retardant and environment-friendly carbon fiber board according to claim 4, characterized in that: The forming roller has an electric heating element 1 and an electric heating element 2, and the electric heating element 1 is in contact with the forming roller and can raise the temperature of the forming roller to 60-70 O The electric heating element 2 is in contact with the cutter and can raise the temperature of the cutter to 80-85 O C.

6. The method for preparing the flame-retardant and environment-friendly carbon fiber board according to claim 5, characterized in that: The diameter of the forming roller is 5-8 meters, and the rotation speed of the forming roller is 4-7 revolutions per minute.

7. The method for preparing the flame-retardant and environment-friendly carbon fiber board according to claim 6, characterized in that: The bottom of the conveying trough is fixedly connected with an electric heating element 3, which is in contact with the conveying trough and can raise the conveying trough to 40-55 O C.

8. The method for preparing the flame-retardant and environment-friendly carbon fiber board according to claim 7, characterized in that: When the cutter rotates to the lowest part along with the forming roller, the gap between the cutter and the bottom of the conveying trough is 0.5-0.8 mm.

9. The method for preparing the flame-retardant and environment-friendly carbon fiber board according to claim 8, characterized in that: The frame is also movably connected with a preforming roller and a second motor. Along the moving direction of the material in the conveying trough, the preforming roller is located in front of the forming roller. The second motor is fixedly connected to the frame and connected to the preforming roller.

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