Demoulding device for preparing carbon fiber composite material

Abstract

The utility model provides a demolding device for preparing a carbon fiber composite material, comprising: a pressure relief channel vertically communicating with the bottom of a lower mold on a hot-pressing forming machine, and internally provided with an annular limiting plate having a preset distance from the bottom of the lower mold; the up-down moving assembly is arranged on the hot-pressing forming machine and provided with a bearing plate, an extrusion column located under the pressure relief channel is arranged on the top face of the bearing plate, the height of the extrusion column is larger than the distance between the limiting plate and the bottom end of the pressure relief channel, and the diameter of the extrusion column is larger than the inner diameter of the limiting plate; the up-down moving assembly is used for driving the extrusion column on the bearing plate to extend into or out of the pressure relief channel; and one end of the pneumatic assembly communicates with the side wall of the bottom of the pressure relief channel, and the pneumatic assembly is used for introducing cooling gas into the pressure relief channel. The risk that the carbon fiber composite product deforms and even is damaged in the separation process of the lower mold and the carbon fiber composite product is avoided, and the separation efficiency of the lower mold and the carbon fiber composite product is improved.

Description

Technical Field

[0001] The present application relates to the technical field of carbon fiber composite material preparation, and in particular to a demoulding device for preparing carbon fiber composite materials. Background Art

[0002] Carbon fiber composite materials are inorganic high-performance fibers that are transformed from organic fibers through a series of heat treatments and have a carbon content of more than 90%. They are a new material with excellent mechanical properties. They have the inherent characteristics of carbon materials and the softness and processability of textile fibers. They are a new generation of reinforcing fibers.

[0003] After the existing carbon fiber composite material is prepared by hot pressing molding machine, it is necessary to demould the mold (upper mold and lower mold) loaded with the carbon fiber composite material product and the carbon fiber composite material product, because in the hot pressing molding process, the carbon fiber composite material to be extruded in the lower mold is extruded by the upper mold, and the lower mold is the pressure-bearing party during the extrusion process. Therefore, after the extrusion molding process is completed, the tightness of the connection between the lower mold and the carbon fiber composite material product is relatively high, which makes the demoulding process between the lower mold and the carbon fiber composite material product time-consuming and labor-intensive, and the external force applied to the lower mold or the carbon fiber composite material product during the demoulding process is too large, and there is a risk of deformation or even damage to the lower mold or the carbon fiber composite material product. Utility Model Content

[0004] The present application provides a demoulding device for preparing carbon fiber composite materials, which is used to solve the technical problems described in the above background technology.

[0005] The present application provides a demoulding device for preparing a carbon fiber composite material, comprising:

[0006] A pressure relief channel, the pressure relief channel is vertically connected to the bottom of the lower mold on the hot pressing molding machine, and an annular limiting plate is arranged therein at a preset distance from the bottom of the lower mold;

[0007] A vertical moving assembly, the vertical moving assembly is arranged on the hot pressing forming machine and a bearing plate is arranged on the vertical moving assembly, a top surface of the bearing plate is provided with an extrusion column located directly below the pressure relief channel, the height of the extrusion column is greater than the distance between the limit plate and the bottom end of the pressure relief channel and the diameter thereof is greater than the inner diameter of the limit plate, and the vertical moving assembly is used to drive the extrusion column on the bearing plate to extend into or out of the pressure relief channel;

[0008] A pneumatic component, one end of which is connected to the side wall at the bottom of the pressure relief channel, and is used to introduce cooling gas into the pressure relief channel.

[0009] Optionally, the up-and-down moving assembly includes a threaded rod, a guide rod and a drive motor;

[0010] The threaded rod threadably penetrates the supporting plate and its top end is rotatably arranged on the thermoforming machine, the bottom end of the threaded rod is connected to the output shaft of the driving motor arranged on the thermoforming machine, and the guide rod penetrates the supporting plate and its top and bottom ends are both arranged on the thermoforming machine.

[0011] Optionally, the pneumatic assembly includes an annular tube, an air jet tube and a cold air tube;

[0012] One end of the jet pipe is connected to the annular pipe, and one end of the jet pipe away from the annular pipe is connected to the side wall of the bottom of the pressure relief channel. One end of the cold air pipe is connected to the annular pipe and the other end is used to connect to a cold air source.

[0013] Optionally, an air jet nozzle located in the pressure relief channel is provided at one end of the air jet pipe communicating with the pressure relief channel, and an air outlet of the air jet nozzle faces upward.

[0014] Optionally, there are a plurality of the air injection pipes, and the plurality of the air injection pipes are connected to the annular pipe and the peripheral wall of the bottom of the pressure relief channel at equal intervals.

[0015] Optionally, a booster pump is provided on the cold air pipe.

[0016] Optionally, the diameter of the extrusion column is 0.5 to 0.6 times the inner diameter of the pressure relief channel, and is 1.3 to 1.4 times the inner diameter of the limiting plate.

[0017] The demoulding device for preparing carbon fiber composite materials provided by the present application, before the preparation of carbon fiber composite materials, the extrusion column on the bearing plate is driven by the up and down moving components to extend into the pressure relief channel and the top of the extrusion column is connected to the lower surface of the limit plate. After the preparation process of the carbon fiber composite material is completed, the extrusion column is pulled down by the up and down moving components until the top of the extrusion column extends from the bottom of the pressure relief channel, and the process of the extrusion column extending out of the pressure relief channel is the process of pressure relief between the lower mold and the carbon fiber composite product in the lower mold, so that the tightness of the connection between the lower mold and the hot-pressed carbon fiber composite material is reduced. In addition, after the top of the extrusion column extends from the bottom of the pressure relief channel, the cooling gas is introduced into the pressure relief channel through the pneumatic component connected to the side wall at the bottom of the pressure relief channel. On the one hand, the cooling gas enters the bottom of the lower mold through the pressure relief channel and diffuses into the entire space in the lower mold, so that the carbon fiber composite product in the lower mold is further cold-shrunk, thereby improving the separation degree between the lower mold and the carbon fiber composite product; on the other hand, the process of the cooling gas spraying into the bottom of the lower mold through the pressure relief channel gives the carbon fiber composite product in the lower mold an upward impulse, so that the lower mold and the carbon fiber composite product inside it can be effectively separated. That is to say, in the present application, the arrangement of the pressure relief channel, the supporting plate, the extrusion column, the up and down moving components and the pneumatic components facilitates the separation of the lower mold and the carbon fiber composite product therein, thereby avoiding the risk of deformation or even damage of the carbon fiber composite product during the separation process and improving the separation efficiency of the lower mold and the carbon fiber composite product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic structural diagram of a demoulding device for preparing a carbon fiber composite material provided in one embodiment of the present application;

[0020] Figure 2 A schematic diagram of the structure of a pneumatic assembly provided in one embodiment of the present application;

[0021] Figure 3 A schematic diagram of the internal structure of a pressure relief channel provided in one embodiment of the present application.

[0022] In the figure: 100, pressure relief channel; 101, limit plate; 200, hot pressing machine; 201, lower mold; 300, up and down moving assembly; 301, bearing plate; 3011, extrusion column; 302, threaded rod; 303, guide rod; 304, drive motor; 400, pneumatic assembly; 401, annular tube; 402, jet tube; 4021, jet nozzle; 403, cold air pipe; 4031, booster pump; 500, cold air source. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0024] refer to Figures 1 to 3 The present application provides a demoulding device for preparing a carbon fiber composite material, comprising:

[0025] The pressure relief channel 100 is vertically connected to the bottom of the lower mold 201 on the hot press molding machine 200, and a ring-shaped limit plate 101 is provided therein at a preset distance from the bottom of the lower mold 201 (which can be set according to actual needs, and the present application does not specifically limit it here); wherein the hot press molding machine 200 is used for the preparation of carbon fiber composite materials to obtain carbon fiber composite materials products. The hot press molding machine 200 is provided with a telescopic device (for example: a cylinder, a hydraulic cylinder, etc.), and an upper mold is provided on the telescopic end of the telescopic device, and the upper mold cooperates with the lower mold 201 (the upper mold is a convex mold, and the lower mold 201 is a concave mold). In the process of preparing the carbon fiber composite material, the raw material for preparing the carbon fiber composite material is added into the mold cavity of the lower mold 201, and the upper mold is driven by the telescopic device to perform hot press molding on the raw material in the mold cavity of the lower mold 201, and after the raw material in the lower mold 201 is hot pressed and molded, the upper mold is pulled upward by the telescopic device to separate the upper mold from the carbon fiber composite material product after hot pressing and molding in the lower mold 201.

[0026] The up-and-down moving component 300 is arranged on the hot pressing molding machine 200 and is provided with a carrying plate 301 thereon. The top surface of the carrying plate 301 is provided with an extrusion column 3011 located directly below the pressure relief channel 100. The height of the extrusion column 3011 is greater than the distance between the limiting plate 101 and the bottom end of the pressure relief channel 100 (so that the top end of the extrusion column 3011 can be connected to the lower surface of the limiting plate 101 to play a role in sealing the limiting plate 101, thereby preventing the hot pressing material used to prepare the carbon fiber composite material from flowing into the pressure relief channel 100 below the limiting plate 101 through the limiting plate 101, causing the entire pressure relief channel 100 to be blocked, thereby ensuring the convenience of the subsequent separation process between the lower mold 201 and the carbon fiber composite material product after hot pressing molding) and its diameter is greater than the inner diameter of the limiting plate 101. The extrusion column 3011 on the supporting plate 301 is driven to extend into or out of the pressure relief channel 100 before the preparation of the carbon fiber composite material. The extrusion column 3011 on the supporting plate 301 is driven to extend into the pressure relief channel 100 by moving the assembly 300 up and down, and the top end of the extrusion column 301 is abutted on the lower surface of the limiting plate 101. Since the diameter of the extrusion column 3011 is larger than the inner diameter of the limiting plate 101, that is, the top end of the extrusion column 3011 is abutted on the lower surface of the limiting plate 101, it plays a role in blocking the hot pressing material flowing into the pressure relief channel 100 from the inner bottom of the lower mold 201, thereby preventing the hot pressing material from flowing into the pressure relief channel 100 below the limiting plate 101 through the limiting plate 101, causing the entire pressure relief channel 100 to be blocked, thereby ensuring the convenience of the subsequent separation process between the lower mold 201 and the carbon fiber composite material product after hot pressing. The preset distance between the bottom of the lower mold 201 and the upper surface of the limit plate 101 (which can be set according to actual needs and is not specifically limited in this application) is intended to ensure that a convex column is formed on the carbon fiber composite product obtained after hot pressing, so as to prevent the top of the extrusion column 3011 from extending into the lower mold 201, causing the carbon fiber composite product after hot pressing to form a depression similar to the shape of the extrusion column 3011, resulting in the carbon fiber composite product after hot pressing not meeting the preparation requirements of carbon fiber composite products. Since the carbon fiber composite product after hot pressing needs to be further processed by grinding, the convex column on the carbon fiber composite product after hot pressing can be removed during the grinding process to obtain a carbon fiber composite product that meets the requirements. In addition, since the up and down moving component 300 can drive the extrusion column 3011 on the supporting plate 301 to extend into or out of the pressure relief channel 100, that is, the diameter of the extrusion column 3011 is smaller than the inner diameter of the pressure relief channel 100, it is convenient for air to enter the pressure relief channel 100 and enter the lower mold 201 after the top end of the extrusion column 3011 extends out of the pressure relief channel 100.

[0027] Pneumatic component 400, one end of which is connected to the side wall at the bottom of pressure relief channel 100, is used to introduce cooling gas into pressure relief channel 100. On the one hand, the cooling gas enters the bottom of lower mold 201 through pressure relief channel 100 and diffuses to the entire space in lower mold 201, so that the carbon fiber composite material product in lower mold 201 further shrinks, thereby improving the degree of separation between lower mold 201 and carbon fiber composite material product; on the other hand, the process of cooling gas spraying into the bottom of lower mold 201 through pressure relief channel 100 gives the carbon fiber composite material product in lower mold 201 an upward impulse, so that lower mold 201 and the carbon fiber composite material product therein can be effectively separated.

[0028] The demoulding device for preparing carbon fiber composite materials provided in the present application, before the preparation of the carbon fiber composite material, the extrusion column 3011 on the supporting plate 301 is driven by the up and down moving component 300 to extend into the pressure relief channel 100 and the top of the extrusion column 301 is connected to the lower surface of the limit plate 101. After the preparation process of the carbon fiber composite material is completed, the extrusion column 3011 is pulled downward by the up and down moving component 300 until the top of the extrusion column 3011 extends out from the bottom of the pressure relief channel 100. The process of the extrusion column 3011 extending out of the pressure relief channel 100 is the process of decompression between the lower mold 201 and the carbon fiber composite product in the lower mold 201, so that the tightness of the connection between the lower mold 201 and the hot-pressed carbon fiber composite material is reduced. In addition, after the top end of the extrusion column 3011 extends out from the bottom of the pressure relief channel 100, cooling gas is introduced into the pressure relief channel 100 through the pneumatic component 400 connected to the side wall at the bottom of the pressure relief channel 100. On the one hand, the cooling gas enters the bottom of the lower mold 201 through the pressure relief channel 100 and diffuses to the entire space in the lower mold 201, so that the carbon fiber composite material product in the lower mold 201 further shrinks, thereby improving the degree of separation between the lower mold 201 and the carbon fiber composite material product; on the other hand, the process of cooling gas spraying into the bottom of the lower mold 201 through the pressure relief channel 100 gives the carbon fiber composite material product in the lower mold 201 an upward impact, so that the lower mold 201 and the carbon fiber composite material product therein can be effectively separated. That is to say, in the present application, the arrangement of the pressure relief channel 100, the supporting plate 301, the extrusion column 3011, the up and down moving assembly 300 and the pneumatic assembly 400 facilitates the separation of the lower mold 201 and the carbon fiber composite material product therein, thereby avoiding the risk of deformation or even damage of the carbon fiber composite material product during the separation process and improving the separation efficiency of the lower mold 201 and the carbon fiber composite material product.

[0029] In some embodiments, reference Figure 1The up and down moving component 300 in the present application includes a threaded rod 302, a guide rod 303 and a driving motor 304; specifically, the threaded rod 302 threadably penetrates the supporting plate 301 and its top end is rotatably set on the hot pressing molding machine 200, the bottom end of the threaded rod 302 is connected to the output shaft of the driving motor 304 set on the hot pressing molding machine 200, and the guide rod 303 penetrates the supporting plate 301 and its top and bottom ends are both set on the hot pressing molding machine 200.

[0030] In the above embodiment, the threaded rod 302 is driven to rotate by the driving motor 304, so that the bearing plate 301 moves vertically up and down along the threaded rod 302 and the guide rod 303, so that the extrusion column 3011 on the bearing plate 301 vertically extends into or out of the pressure relief channel 100, and the extrusion column 3011 extends into the pressure relief channel 100 and its top abuts against the lower surface of the limit plate 101, so that the top of the extrusion column 3011 blocks the limit plate 101, and prevents the hot pressing material from flowing into the pressure relief channel 100 below the limit plate 101 through the limit plate 101, and the top of the extrusion column 3011 extends out of the pressure relief channel 100, so as to achieve pressure relief between the lower mold 201 and the hot-pressed carbon fiber composite material product, and facilitate the separation of the carbon fiber composite material product from the lower mold 201. In addition, the limiting effect of the guide rod 303 on the bearing plate 301 improves the stability of the up and down movement of the bearing plate 301.

[0031] In some embodiments, reference Figure 2 The pneumatic component 400 in the present application includes an annular tube 401, an injection tube 402 and a cold air tube 403; specifically, one end of the injection tube 402 is connected to the annular tube 401, and one end of the injection tube 402 away from the annular tube 401 is connected to the side wall at the bottom of the pressure relief channel 100, and one end of the cold air tube 403 is connected to the annular tube 401 and the other end is used to connect to the cold air source 500.

[0032] In the above embodiment, in the process of the up and down moving component 300 driving the extrusion column 3011 on the supporting plate 301 to extend out of the pressure relief channel 100, that is, the top of the extrusion column 301 gradually moves away from the lower surface of the limit plate 101. In this process, cooling gas is provided by the cold air source 500, and the cooling gas enters the pressure relief channel 100 through the annular tube 401 and the injection pipe 402 in turn. The cooling gas entering the pressure relief channel 100 is sprayed from the middle of the injection pipe 402 into the bottom of the lower mold 201 to cool the lower mold 201 and the carbon fiber composite material product therein and apply an upward impact force to the carbon fiber composite material product in the lower mold 201, thereby facilitating the separation of the carbon fiber composite material product from the lower mold 201.

[0033] In some embodiments, reference Figure 3In the present application, one end of the air jet pipe 402 connected to the pressure relief channel 100 is provided with an air jet nozzle 4021 located in the pressure relief channel 100, and the air outlet of the air jet nozzle 4021 faces upward, so that the gas coming out of the air jet pipe 402 is ejected upward through the upward air outlet of the air jet nozzle 4021, ensuring the impact of the cooling gas on the lower mold 201 and the carbon fiber composite material product therein, so that the cooling gas is ejected upward as much as possible, ensuring the separation efficiency of the carbon fiber composite material product and the lower mold 201.

[0034] In some embodiments, reference Figure 2 In the present application, there are multiple jet pipes 402, and the multiple jet pipes 402 are evenly spaced and connected to the peripheral wall of the annular pipe 401 and the bottom of the pressure relief channel 100. The arrangement of the multiple jet pipes 402 enables the cooling gas ejected from the multiple jet pipes 402 evenly spaced and connected to the peripheral wall of the annular pipe 401 and the bottom of the pressure relief channel 100 to be evenly distributed in the pressure relief channel 100 and evenly enter the bottom of the lower mold 201. The arrangement of the multiple jet pipes 402 increases the amount of cooling gas that enters the lower mold 201 at the same time, thereby increasing the impact of the cooling gas on the carbon fiber composite material product in the lower mold 201 at the same time and the cooling efficiency, facilitating the separation of the carbon fiber composite material product from the lower mold 201, and thus improving the demoulding efficiency.

[0035] In some embodiments, reference Figure 2 In the present application, a booster pump 4031 is provided on the cooling air pipe 403. The booster pump 4031 provides the power for the cooling gas to enter the annular pipe 401 and the jet pipe 402, and at the same time improves the power for the cooling gas to enter the pressure relief channel 100 after being ejected from the jet pipe 402, so that the cooling gas exerts a greater impact on the carbon fiber composite material product in the lower mold 201, and accelerates the separation of the carbon fiber composite material product from the lower mold 201.

[0036] In some embodiments, the diameter of the extrusion column 3011 in the present application is 0.5 to 0.6 times the inner diameter of the pressure relief channel 100 , and is 1.3 to 1.4 times the inner diameter of the limiting plate 101 .

[0037] In the above embodiment, the ratio range of the diameter of the extrusion column 3011 to the inner diameter of the pressure relief channel 100 and the ratio range of the inner diameter of the limit plate 101 can ensure that when the top of the extrusion column 3011 abuts against the lower surface of the limit plate 101, the top of the extrusion column 3011 can fully block the limit plate 101, and there is enough distance between the outer peripheral wall of the extrusion column 3011 and the inner peripheral wall of the pressure relief channel 100 for the cooling gas to enter the lower mold 201 through the pressure relief channel 100 and the middle of the limit plate 101, thereby accelerating the separation of the lower mold 201 and the carbon fiber composite material product therein. The ratio values ​​of the diameter of the extrusion column 3011 to the inner diameter of the pressure relief channel 100 and the ratio values ​​of the inner diameter of the limit plate 101 can be set according to actual needs, and therefore, the present application does not make specific limitations on them.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features therein may be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A demoulding device for preparing carbon fiber composite materials, characterized in that: include: A pressure relief channel (100), the pressure relief channel (100) being vertically connected to the bottom of a lower mold (201) on a hot pressing molding machine (200), and having an annular limiting plate (101) disposed therein at a preset distance from the bottom of the lower mold (201); A vertical moving component (300), the vertical moving component (300) is arranged on the hot pressing molding machine (200) and a bearing plate (301) is arranged on the bearing plate, the top surface of the bearing plate (301) is provided with an extrusion column (3011) located directly below the pressure relief channel (100), the height of the extrusion column (3011) is greater than the distance between the limiting plate (101) and the bottom end of the pressure relief channel (100), and the diameter of the extrusion column (3011) is greater than the inner diameter of the limiting plate (101), and the vertical moving component (300) is used to drive the extrusion column (3011) on the bearing plate (301) to extend into or out of the pressure relief channel (100); A pneumatic component (400), one end of which is connected to the side wall at the bottom of the pressure relief channel (100) and is used to introduce cooling gas into the pressure relief channel (100).

2. The demoulding device for preparing carbon fiber composite materials according to claim 1, characterized in that: The up-and-down moving assembly (300) comprises a threaded rod (302), a guide rod (303) and a driving motor (304); The threaded rod (302) threadably penetrates the bearing plate (301) and its top end is rotatably arranged on the thermoforming machine (200); the bottom end of the threaded rod (302) is connected to the output shaft of the driving motor (304) arranged on the thermoforming machine (200); the guide rod (303) penetrates the bearing plate (301) and its top end and bottom end are both arranged on the thermoforming machine (200).

3. The demoulding device for preparing carbon fiber composite materials according to claim 1, characterized in that: The pneumatic assembly (400) comprises an annular tube (401), an air jet tube (402) and a cold air tube (403); One end of the jet pipe (402) is connected to the annular pipe (401), and one end of the jet pipe (402) away from the annular pipe (401) is connected to the side wall of the bottom of the pressure relief channel (100); one end of the cold air pipe (403) is connected to the annular pipe (401) and the other end is used to connect to a cold air source (500).

4. The demoulding device for preparing carbon fiber composite materials according to claim 3, characterized in that: One end of the air jet pipe (402) that is in communication with the pressure relief channel (100) is provided with an air jet nozzle (4021) located in the pressure relief channel (100), and the air outlet of the air jet nozzle (4021) faces upward.

5. The demoulding device for preparing carbon fiber composite materials according to claim 3, characterized in that: There are a plurality of the air injection pipes (402), and the plurality of the air injection pipes (402) are connected at equal intervals on the peripheral wall of the annular pipe (401) and the bottom of the pressure relief channel (100).

6. The demoulding device for preparing carbon fiber composite materials according to any one of claims 3 to 5, characterized in that: The cold air pipe (403) is provided with a booster pump (4031).

7. The demoulding device for preparing carbon fiber composite materials according to any one of claims 1 to 5, characterized in that: The diameter of the extrusion column (3011) is 0.5 to 0.6 times the inner diameter of the pressure relief channel (100), and is 1.3 to 1.4 times the inner diameter of the limiting plate (101).

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