TWM620229U - Mold for carbon fiber composite material - Google Patents

Abstract

The present application relates to a mold for carbon fiber composite material. The mold comprises a first mold, a second mold, a frame mold and a plurality of stopping mold. The frame mold is disposed between the first mold and the second mold, and the stopping mold is disposed between the first mold and the frame mold. An enclosing space is defined by the frame mold, and protruding portions of the first mold and the second mold are protruded into the space. The stopping mold is pressed against the first mold and the frame mold. The carbon fiber composite material with a corresponding thickness can be conveniently produced with the mold of the present application by replacing the stopping mold, thereby be suitable to various fields of the application.

Description

Mould for carbon fiber composite board

This creation is related to a mold, especially to provide a mold that can produce carbon fiber composite panels of various thickness specifications.

In order to meet the requirements of various applications, the research department of materials science is booming. However, with the extreme development of applications, the requirements for material properties have become more stringent. Accordingly, a composite material system that blends a variety of materials to combine the characteristics of each material has been developed vigorously. Among them, because carbon fiber materials have light weight and good mechanical properties (such as strength and modulus, etc.), they are often used as reinforcing materials for composite materials.

Composite materials are generally made by compression molding, and the mold used is preferably a metal mold based on accuracy requirements. As the requirements of the application end (such as application requirements such as load, support, and/or inference) change, the configuration design of the components in the research and development stage often needs to be changed frequently. However, the preparation of metal molds requires a lot of money and time cost. Therefore, before confirming whether the designed configuration can meet the demand, R&D personnel dare not rush to prepare the required molds, which affects R&D.

In view of this, there is an urgent need to provide a carbon fiber composite board mold to improve the defect that the conventional mold cannot be used to produce carbon fiber composite boards of different sizes.

Therefore, one aspect of this creation is to provide a carbon fiber composite board mold, which is suitable for making carbon fiber composite boards of various thickness specifications by setting a stop mold.

According to one aspect of this creation, a carbon fiber composite board mold is proposed. The mold is used to make carbon fiber composite boards, and the mold includes a first mold, a second mold, a frame mold, and a plurality of stop molds. The first mold has a flange and a first protrusion, and the second mold has a second protrusion. The frame mold is set between the first mold and the second mold, and the frame mold defines a surrounding space, wherein the first protrusion and the second protrusion protrude into the surrounding space, and the first protrusion The surface of the part and the surface of the second protruding part are attached to the inner wall of the frame body mold. These stop molds are arranged between the first mold and the frame mold, wherein the stop molds abut the flange and the top surface of the frame mold. The aforementioned first mold, second mold, and frame mold define a molding space, and the molding space is configured to accommodate at least one carbon fiber prepreg material.

According to some embodiments of the present invention, the sum of the protrusion distance of the first protrusion and the protrusion distance of the second protrusion is equal to the height of the frame mold.

According to some embodiments of this creation, the aforementioned stop molds are of the same height.

According to some embodiments of the present invention, the height of the aforementioned stop mold is smaller than the protrusion distance of the first protrusion.

According to some embodiments of the present invention, the aforementioned frame mold has a flow channel, and the inner wall of the frame mold is provided with at least one drainage port, wherein the flow channel communicates with the at least one drainage port.

According to some embodiments of the present invention, based on the bottom surface of the aforementioned frame mold, the flow channel is lower than each drainage port.

According to some embodiments of the present invention, the outer wall of the frame body mold is provided with at least one liquid discharge port, and the flow channel is connected to each liquid discharge port.

According to some embodiments of the present invention, the resin content of the aforementioned carbon fiber composite sheet is less than the total resin content of at least one carbon fiber prepreg material, and the resin outflow rate of the carbon fiber composite sheet is greater than 0% and less than or equal to 5%.

According to some embodiments of the present invention, the aforementioned frame mold is a square frame.

According to some embodiments of the present invention, the accuracy of the aforementioned carbon fiber composite panel is less than 4%, and based on the volume of the carbon fiber composite panel is 100% by volume, the fiber content of the carbon fiber composite panel is 53% to 63% by volume.

Using the carbon fiber composite board mold created by this invention, the stop mold is set between the top mold and the frame mold, so that the thickness of the prepared carbon fiber composite board can correspond to the height of the stop mold, so it can meet the back-end application The specification requirements. Secondly, the frame mold can have a runner, which can contain the excess resin material extruded during the hot pressing process, which in turn contributes to the bond between the carbon fiber and the resin base material, thereby improving the physical properties and physical properties of the carbon fiber composite sheet. Mechanical strength. Among them, with the arrangement of the runner, the extrusion of the excess resin material will not affect the straightness of the carbon fiber, and the reinforcing effect of the carbon fiber on the resin substrate can be maintained, so the carbon fiber composite board produced has good properties. According to this, the mold of this creation can effectively reduce the cost of mold development, shorten the time of mold development, and accelerate the speed of research and development.

The manufacture and use of this creative embodiment are discussed in detail below. However, it is understandable that the embodiments provide many applicable authoring concepts, which can be implemented in various specific contents. The specific embodiments discussed are for illustration only, and are not intended to limit the scope of this creation.

Please refer to FIGS. 1A to 1C at the same time, in which FIG. 1A is a three-dimensional schematic diagram of a carbon fiber composite board mold according to some embodiments of the invention, and FIG. 1B is a schematic diagram of a carbon fiber composite board mold according to some embodiments of the invention The exploded schematic view, and FIG. 1C is a schematic cross-sectional view of the carbon fiber composite sheet die cut along the section line AA' of FIG. 1A. The mold 100 of this creation includes a top mold 110, a bottom mold 130, a frame mold 120, and a plurality of stop molds 140.

The top mold 110 has a flange 110 a and a protrusion 111, and the bottom mold 130 has a flange 130 a and a protrusion 131. The top mold 110 and the bottom mold 130 referred to in this creation are only distinguished for clear description, but there is no significant difference in essence between the two. In some embodiments, the two can be replaced with each other. The protrusion 111 of the top mold 110 has a protrusion distance H ₁ , wherein the protrusion distance H ₁ is calculated from the bottom surface of the flange 110 a. Similarly, the protrusion 131 of the bottom mold 130 has a protrusion distance H ₃ .

The frame mold 120 is disposed between the top mold 110 and the bottom mold 130, and the frame mold 120 is composed of a plurality of frame bars, wherein these frame bars can define the surrounding space 120c of the frame mold 120. In this creation, the protruding portions 111 and 131 of the top mold 110 and the bottom mold 130 can protrude into the surrounding space 120c, and the side surfaces of the protruding portions 111 and 131 are all attached to the inner wall 121 of the frame mold 120. The frame mold 120 has a height H ₂ , and the sum of the aforementioned protrusion distance H ₁ and the protrusion distance H ₃ is equal to the height H _{2 of the} frame mold 120.

Please refer to Figure 1C. The frame mold 120 may have a flow channel 125 inside, and the inner wall 121 may be provided with at least one drainage port 123, wherein the drainage port 123 can be connected to the flow channel 125 through the flow channel 127. In some embodiments, based on the process conditions of the mold 100, the form of the runner 127 is not limited to the configuration shown in FIG. 1C, and it only needs to connect the drainage port 123 and the runner 125. In order to achieve a better drainage effect, the runners 125 are arranged along the frames of the frame mold 120, and the runners 125 in each frame are connected to each other. Secondly, when the protruding portion 131 of the bottom mold 130 protrudes to the surrounding space 120c, the height of the drainage port 123 is not lower than the top surface of the protruding portion 131 (that is, the side surface of the drainage port 123 does not block the drainage port 123). In addition, with the bottom surface 120b of the frame mold 120 as a reference, the flow channel 125 is not higher than each drainage port 123, and the flow channel 125 is preferably lower than the drainage port 123.

Although the drawing of this creation is not shown, in some embodiments, the outer wall of the frame mold 120 can be optionally provided with at least one liquid discharge port, which is the same as the drainage port 123. The liquid discharge ports are respectively provided by The flow channel 127 is combined with the flow channel to connect the flow channel 125 to discharge the liquid from the mold 100. Among them, the discharge port is not higher than the flow channel 125. Preferably, the discharge port is lower than the flow channel 125 to have a better discharge effect.

Please refer to Figure 1A to Figure 1C. The stop mold 140 is set between the top mold 110 and the frame mold 120, and during the hot pressing process, each stop mold 140 abuts the flange 110a of the top mold 110 and the top surface 120a of the frame mold 120 . Accordingly, when the hot pressing process is performed, due to the stop of the stop mold 140, the bottom surface of the protrusion 111 is separated from the top surface of the protrusion 131 by a distance, and it is understandable that this distance is the stop mold The height of 140 is H ₄ . In some embodiments, the stop molds 140 are of the same height to ensure that the applied pressure can be evenly absorbed by the stop molds 140 during hot pressing. In other embodiments, depending on the configuration of the frame mold 120, the mold 100 may only have two stop molds 140. In these embodiments, the two stop molds 140 are preferably set on the frame strips on the opposite sides of the frame mold 120, respectively. For example, for a square frame mold 120, the two stop molds 140 are respectively arranged on two opposite frame bars instead of on two adjacent frame bars. However, this creation is not limited to this. In some embodiments, depending on the difference in pressure, the design of the frame mold 120, and/or the difference in other conditions, the two stop molds 140 may also be placed adjacent to each other. On the box.

With the setting of the stop mold 140, the protrusion 111 of the top mold 110, the protrusion 131 of the bottom mold 130, and the frame mold 120 can define a molding space, and the molding space can be used to accommodate at least one carbon fiber prepreg material (Such as carbon fiber prepreg).

Please refer to Figure 1A and Figure 1B. Although the length of the stop mold 140 shown is equal to the length of the frame mold 120, the present creation is not limited to this. In some embodiments, the length and width of the stop mold 140 are not particularly limited. It only needs to achieve the aforementioned stopping effect without affecting the movement of the protrusions 111 and 131.

Please refer to Figure 1C. In some application examples, when the mold 100 of the present invention is used to make carbon fiber composite panels, the frame mold 120 is first combined with the bottom mold 130, and the stack is disposed on the top surface of the protrusion 131 of the bottom mold 130. Among them, the stacking system is formed by sequentially laying Teflon cloth, multi-layer carbon fiber prepreg cloth and another Teflon cloth.

It is expected that in order to place these raw materials, the frame mold 120 should have a configuration at least corresponding to the size specifications of the stack. After the stack is set, the stop mold 140 is set on the top surface 120a of the frame mold 120, and the top mold 110 is set so that the protruding portion 111 of the top mold 110 protrudes into the surrounding space of the frame mold 120. In the aforementioned stage of setting the stop mold 140, the stop mold 140 may have a corresponding height H ₄ based on the set height specification of the carbon fiber composite sheet. Wherein, in order to prevent the protrusion 111 from being unable to protrude into the surrounding space of the frame mold 120, the height H _{4 of the} stop mold 140 must be smaller than the protrusion distance H ₁ of the protrusion 111. The thickness of the aforementioned multi-layer carbon fiber prepreg is greater than the thickness specification set for the carbon fiber composite board. In some specific examples, the top mold 110, the frame mold 120, the bottom mold 130, and the stop mold 140 may be made of, for example, metal materials, resin materials, gypsum materials, other suitable materials, or any mixture of the foregoing materials. Among them, the top mold 110, the frame mold 120, the bottom mold 130, and the stop mold 140 can be made of the same or different materials, respectively.

Then, the mold 100 is heated, and pressure is applied to the top surface of the top mold 110 to perform a hot pressing process. Wherein, by the application of pressure, the top mold 110 gradually descends toward the bottom mold 130 until the flange 110a of the top mold 110 abuts against the stop mold 140, so that the thickness T of the compressed prepregs (that is, the produced The thickness of the carbon fiber composite board is equal to the height H _{4 of the} stop mold 140. During the hot pressing process, the resin material in the prepreg is in a molten state due to the application of high temperature heat energy. Therefore, as the top mold 110 drops, the distance between these prepregs is gradually reduced, resulting in Excess molten resin is squeezed out between the prepregs. The extruded molten resin will flow into the runner 127 and the runner 125 through the drainage port 123 in sequence.

Since the excess resin can be extruded, the pore defects in the carbon fiber composite board can be effectively eliminated by the hot pressing process, and the bonding properties of the carbon fiber and the resin substrate can be improved. Secondly, during the hot pressing process, the conformability of the carbon fiber will not be affected, and the physical properties and mechanical strength of the carbon fiber composite sheet can be fully displayed. It is understandable that the resin content of the prepared carbon fiber composite board is less than the total resin content of all carbon fiber prepregs, and is based on the ratio of the resin outflow (that is, the difference between the total resin content and the resin content) and the total resin content. The resin outflow rate of the carbon fiber composite sheet can be calculated. In some specific examples, the resin outflow rate may be greater than 0% and less than or equal to 5%. When the resin outflow rate is in this range, the carbon fiber composite board can have better mechanical properties.

After the hot pressing process is performed, the demolding process is performed to obtain the carbon fiber composite board. In some embodiments, in order to prevent the resin material from adhering to the inner wall of the mold 100, thereby reducing the efficiency of the demolding process, and reducing the quality of the carbon fiber composite sheet produced, the inner wall of the mold 100 is Can be coated with release agent. In some specific examples, the release agent can be, for example, but not limited to, a water-based release agent, a solvent-based release agent, a spray type release agent, a silicon release agent, a fluorine-based release agent, and other appropriate release agents, Or any mixture of the above release agents.

In some application examples, in the prepared carbon fiber composite sheet, the volume of the carbon fiber composite sheet is 100% by volume, and the volume content of the fiber is 53% to 63% by volume. Secondly, with the setting of the stop mold, the accuracy of the carbon fiber composite sheet produced by this creation can be controlled within 4%. According to this, the mold of this creation can be used to make carbon fiber composite boards of various thicknesses, and the prepared carbon fiber composite boards have good properties.

Example

First, apply a release agent on the surfaces of the top mold, the frame mold and the lower mold, and place them in an oven at 70°C. After heating for 30 minutes, configure the bottom mold and the frame mold, and put the Teflon cloth, the stack of multi-layer carbon fiber prepreg cloth and another Teflon cloth into the molding space in sequence. Then, the stop mold and the top mold with a height of 1 mm are arranged to perform the hot pressing process, wherein the hot pressing temperature is set to 150°C. After 30 minutes of the hot pressing process, the demoulding process is performed to obtain the carbon fiber composite board of the embodiment. Among them, the carbon fiber composite board of the embodiment has 53 to 63 volume percent of carbon fiber, and its thickness is 0.96 mm to 1.04 mm.

According to the foregoing description, by replacing stop molds of different heights, the molds of this creation can produce carbon fiber composite panels of various specifications, which can meet various application requirements. Secondly, with the runner in the frame mold, the excess resin material in the carbon fiber prepreg can be discharged during the hot pressing process, which improves the bond between the carbon fiber and the resin substrate, thereby improving the carbon fiber composite board. Physical properties and mechanical strength. In the mold of this creation, the discharge of excess resin material will not affect the compliance of the carbon fiber, but can maintain the reinforcing effect of the carbon fiber on the resin substrate, thereby making the prepared carbon fiber composite board have good characteristics. In addition, the mold of this creation can produce carbon fiber composite panels with good dimensional accuracy, which can meet the requirements of back-end applications.

Although this creation has been disclosed in the implementation manner as above, it is not intended to limit this creation. Anyone with ordinary knowledge in the technical field of this creation can make various changes and changes without departing from the spirit and scope of this creation. Retouching, therefore, the scope of protection of this creation shall be subject to the scope of the attached patent application.

100: mold 110: top mold 110a: flange 111: protrusion 120: frame mold 120a: top surface 120b: bottom surface 120c: surrounding space 121: inner wall 123: drainage port 125, 127: runner 130: bottom Mold 130a: flange 131: protrusion 140: stop mold A-A': section line H ₁ , H ₃ : protrusion distance H ₂ , H ₄ : height T: thickness

In order to have a more complete understanding of the embodiments of this creation and their advantages, please refer to the following description and cooperate with the corresponding drawings. It must be emphasized that the various features are not drawn to scale and are for illustration purposes only. The contents of the relevant diagrams are explained as follows. FIG. 1A is a three-dimensional schematic diagram of a carbon fiber composite board mold according to some embodiments of the invention. FIG. 1B is an exploded schematic diagram of the mold of the carbon fiber composite board according to some embodiments of the present creation. FIG. 1C is a schematic cross-sectional view of the carbon fiber composite board die cut along the cutting line AA' of FIG. 1A.

100: Mould

110: Top mold

110a: flange

111: protruding part

120: Frame mold

120a: top surface

120b: bottom surface

121: Inner Wall

123: Drainage port

125, 127: runner

130: bottom mold

131: Protruding part

140: Stop mold

H ₁ , H ₃ : Projection distance

H ₂ , H ₄ : height

T: thickness

Claims (10)

A mold for a carbon fiber composite board, configured to make the carbon fiber composite board, wherein the mold includes: a first mold with a flange and a first protrusion; a second mold with a second protrusion; A frame body mold is arranged between the first mold and the second mold, the frame body mold defines a surrounding space, and the first protrusion and the second protrusion protrude into the surrounding space , And a surface of the first protrusion and a surface of the second protrusion are attached to an inner wall of the frame mold; and a plurality of stop molds are provided on the first mold and the frame mold Between, wherein the stop molds abut against the flange and a top surface of the frame mold, and wherein the first mold, the second mold and the frame mold define a molding space, and the molding space It is configured to accommodate at least one carbon fiber prepreg material. The carbon fiber composite board mold according to claim 1, wherein the sum of the protrusion distance of the first protrusion and the protrusion distance of the second protrusion is equal to the height of the frame mold. The carbon fiber composite board mold according to claim 1, wherein the stop molds are of the same height. The carbon fiber composite board mold according to claim 3, wherein a height of one of the stop molds is smaller than a protrusion of the first protrusion distance. The carbon fiber composite board mold according to claim 1, wherein the frame mold has a flow channel, the inner wall of the frame mold is provided with at least one drainage port, and the flow channel communicates with the at least one drainage port. The carbon fiber composite board mold according to claim 5, wherein the flow channel is lower than each of the at least one drainage port based on a bottom surface of the frame mold. The carbon fiber composite board mold according to claim 6, wherein an outer wall of the frame body mold is provided with at least one liquid discharge port, and the flow channel is connected to each of the at least one liquid discharge port. The carbon fiber composite board mold according to claim 5, wherein the resin content of the carbon fiber composite board is less than the total resin content of the at least one carbon fiber prepreg material, and the resin outflow rate of the carbon fiber composite board is greater than 0 % And less than or equal to 5%. The carbon fiber composite board mold according to claim 1, wherein the frame body mold is a box. The carbon fiber composite board mold according to claim 1, wherein one of the carbon fiber composite boards has an accuracy of less than 4% and is based on the carbon fiber The volume of the composite board is 100% by volume, and the fiber content of one of the carbon fiber composite boards is 53% by volume to 63% by volume.

Images