Production process of basalt fiber composite bar

Abstract

The invention discloses a composite material production technology, and aims to provide a basalt fiber composite bar production technology which is characterized by comprising the following steps: S1, a preparation stage: preparing a plurality of basalt fibers, a plurality of steel wires, a positioning pipe, a plurality of reinforcing blocks and a resin matrix; s2, a stage of impregnating the resin matrix: sequentially adding an accelerant and a curing agent into the resin matrix, fully stirring to obtain a glue solution, and then coating the basalt fibers and the steel wires with the glue solution by using a tool for 1-11 times; s3, an assembling stage, wherein the reinforcing blocks are assembled and connected through the connecting blocks and the connecting grooves, and then the clamping blocks on the reinforcing blocks are inserted into the clamping grooves in the positioning pipes; s4, a steel wire winding stage; s5, a twisting stage; s6, a fixed forming stage; the device is simple and reasonable in structure, convenient to manufacture, easy and convenient to operate, capable of avoiding defects in the prior art and suitable for application and popularization; the method is suitable for the technical field of composite material production.

Description

Technical Field

[0001] The present invention relates to a composite material production technology, and more specifically, to a basalt fiber composite reinforcement production process. Background Art

[0002] In the existing composite material field, the fibers used as composite reinforcements mainly include glass fiber, carbon fiber, boron fiber, alumina fiber, silicon carbide fiber, polyethylene fiber, etc. However, due to price factors, most fibers are only used in the military field, and only glass fiber is widely used in the civilian field. However, in actual application, glass fiber as a composite reinforcement still has certain defects, such as: (1) The production process of glass fiber consumes a lot of energy, which is not conducive to energy saving and environmental protection;

[0003] (2) The production process of glass fiber is harmful to the human body. In particular, glass fiber hair can irritate human skin and cannot be decomposed or absorbed after being inhaled by the human body. It is very likely to cause lung disease or even cancer.

[0004] (3) The environmental pollution is serious. The glass fiber composite reinforcement cannot be recycled or naturally degraded after being discarded, which is not conducive to environmental protection, etc.

[0005] Of course, in order to overcome the defects of the above-mentioned composite reinforcement, people have proposed the use of continuous basalt fiber as a composite reinforcement. As for continuous basalt fiber, we know that it is made of natural volcanic extrusive rock, which is melted at a high temperature of 1450-1500°C and made into a continuous fiber through platinum-germanium alloy drawing. It has many excellent properties such as high strength, high modulus, high temperature resistance, oxidation resistance, acid and alkali resistance, radiation resistance, electrical insulation, thermal insulation and sound insulation, good filtration, high compressive strength, shock absorption and high shear strength. At the same time, it is also a new type of environmentally friendly fiber.

[0006] Existing patent documents CN101531806 (A polyethylene terephthalate / basalt fiber composite material and preparation method thereof 2009.9.16) and CN103044877A (A composite material containing modified basalt fiber and polymer and preparation method thereof 2013.04.17) both suggest a preparation method for making a composite material using basalt fiber as a reinforcement. However, we have performed performance tests on the composite material products obtained by the above preparation method and the continuous basalt fiber composite materials appearing on the market. The test results show that different process conditions have a great influence on the mechanical properties of the composite material, which is mainly manifested in the composition of the basalt fiber material system, the choice of fiber surface treatment and the structure of the composite material. The mechanical properties of the existing composite materials need to be strengthened. For this reason, the present invention specifically proposes a production process for basalt fiber composite bars. Summary of the invention

[0007] In view of the shortcomings of the prior art, the object of the present invention is to provide a production process of basalt fiber composite reinforcement.

[0008] To achieve the above object, the present invention provides the following technical solution: a production process of basalt fiber composite reinforcement, comprising the following steps:

[0009] S1, preparation stage: prepare a number of basalt fibers, a number of steel wires, a positioning tube, a number of reinforcement blocks and a resin matrix;

[0010] S2, resin matrix impregnation stage: add accelerator and curing agent into the resin matrix in sequence, and stir thoroughly to obtain glue solution, then use tools to apply the glue solution on the basalt fiber and steel wire, and the number of times of brushing is 1-11 times;

[0011] S3, assembly stage: assemble and connect the reinforcing blocks through the connecting blocks and the connecting grooves, and then insert the clamping blocks on the reinforcing blocks into the clamping grooves in the positioning tubes;

[0012] S4, steel wire winding stage: take 2-6 steel wires prepared in S2 and cross-wrap them to weave into several braided steel wire segments;

[0013] S5, twisting stage: the steel wire segments are spirally wound on the positioning tube by a twisting machine in an even number of layers to form steel wire segment layers, and 15-20 steel wire segments are taken in each layer;

[0014] S6, fixed forming stage: the basalt fiber obtained in S2 is uniformly wrapped around the steel wire segment layer along the central axis of the positioning tube, and then heated and cured by a curing and forming device to obtain a basalt fiber composite reinforcement.

[0015] The present invention is further configured as follows: in S3, the number of reinforcing blocks is four, and a clamping block and a connecting block are arranged at one end of the reinforcing block, and a clamping block and a connecting groove are arranged at the other end. The cross-section of the reinforcing block is triangular, and a clamping groove for connecting the clamping block is opened on the inner wall of the positioning tube; the reinforcing blocks are connected to each other through the connecting blocks and the connecting grooves to form a structure with a square cross-section, and the square structure is inserted into the clamping groove through the clamping block.

[0016] The present invention is further configured as follows: a filling layer is provided between the square structure and the inner wall of the positioning tube, and the filling layer is made of a flame retardant material.

[0017] The present invention is further configured as follows: in S5, the number of winding layers of the steel wire segment layer is two, and the winding directions of the two layers are opposite.

[0018] The present invention is further configured such that the angle between the steel wire segment spirally wound on the positioning tube and the axis of the positioning tube is 45-55°.

[0019] The present invention is further configured as follows: in S1, the resin matrix is ​​selected from at least one of epoxy resin, vinyl ester resin, phenolic resin, polyimide resin, bismaleimide resin, urea-formaldehyde resin, melamine resin and formaldehyde resin.

[0020] The present invention is further configured as follows: the resin matrix is ​​bisphenol A modified epoxy vinyl ester resin.

[0021] The present invention is further configured as follows: in S6, the curing molding device is pressurized to 0.5-1.5 MPa, the temperature is raised to 110-130° C., and the reaction time is fixed at 1-1.5 h.

[0022] The beneficial effects of the present invention are:

[0023] 1. Compared with the prior art, the production process of the basalt fiber composite bar of the present invention is that the basalt fiber is based on the good chemical stability, thermal stability and mechanical strength of the basalt fiber. After being impregnated with a resin matrix, a steel wire segment layer, a positioning tube and a reinforcement block are arranged in the basalt fiber so that the composite basalt fiber composite bar also has strong mechanical properties, and the difference between the longitudinal thermal expansion coefficient and the transverse thermal expansion coefficient is small, thereby reducing the phenomenon of cracks in the basalt fiber composite bar due to changes in ambient temperature. It can be widely used in industrial, civil and other construction industries, petroleum industry, aviation industry, etc.

[0024] 2. In the production process of the basalt fiber composite bar of the present invention, the reinforcing blocks are assembled and connected by connecting blocks and connecting grooves, and then the clamping blocks on the reinforcing blocks are inserted into the clamping grooves in the positioning tube. The cross-section of the reinforcing blocks is triangular, which makes the stability and strength high. The four reinforcing blocks are connected and assembled together and inserted into the positioning tube, which can enhance the overall strength of the basalt fiber composite bar. The connection between the clamping blocks and the clamping grooves can prevent the reinforcing blocks from shaking in the positioning tube, thereby enhancing the stability.

[0025] 3. In the present invention, a steel wire segment layer is formed by spirally winding a steel wire segment on a positioning tube through a twisting machine into an even number of layers. Compared with the basalt fiber composite bar in the prior art, the steel wire segment layer replaces part of the basalt fiber or other components in the basalt fiber composite bar in the prior art. The expansion change of the steel wire segment layer in an alternating hot and cold environment is smaller than the change range of the basalt fiber and the resin matrix, thereby effectively reducing the lateral expansion coefficient of the produced basalt fiber composite bar. Therefore, the lateral thermal expansion coefficient of the produced basalt fiber composite bar is reduced, and the reduced lateral thermal expansion coefficient is closer to the longitudinal thermal expansion coefficient, thereby effectively reducing the occurrence of cracks in the basalt fiber composite bar in a hot and cold environment. In addition, setting the number of steel wire segment layers to two layers can increase the overall strength of the basalt fiber composite bar and can withstand higher pressure. At the same time, the opposite winding directions of the two layers can ensure uniform pressure resistance of the positioning tube.

[0026] 4. The present invention has a simple and reasonable structure, is easy to manufacture, and is easy to operate. It avoids the defects of the prior art and is suitable for popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The structure diagram of the production process of basalt fiber composite reinforcement of the present invention.

[0028] Figure 2 This is a structural diagram of the steel wire segment layer in the production process of the basalt fiber composite reinforcement of the present invention.

[0029] Figure 1-2 Figure numerals: 1, basalt fiber; 2, positioning tube; 3, reinforcement block; 4, connecting block; 5, connecting groove; 6, clamping block; 7, clamping groove; 8, steel wire segment; 9, steel wire segment layer; 10, filling layer. DETAILED DESCRIPTION

[0030] Reference Figure 1-2 The production process of the basalt fiber composite reinforcement of the present invention is further described in detail.

[0031] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0032] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0033] Figure 1 to Figure 2 The production process of a basalt fiber composite reinforcement shown in the figure includes the following steps:

[0034] S1, preparation stage: prepare a number of basalt fibers 1, a number of steel wires, a positioning tube 2, a number of reinforcement blocks 3 and a resin matrix;

[0035] S2, resin matrix impregnation stage: adding an accelerator and a curing agent into the resin matrix in sequence, and stirring them thoroughly to obtain a glue solution, and then using a tool to apply the glue solution to the basalt fiber 1 and the steel wire, and the number of times of brushing is 1-11 times;

[0036] S3, assembly stage: assemble and connect the reinforcing blocks 3 and 3 through the connecting blocks 4 and the connecting grooves 5, and then insert the clamping blocks 6 on the reinforcing blocks 3 into the clamping grooves 7 in the positioning tubes 2;

[0037] S4, steel wire winding stage: 2-6 steel wires prepared in S2 are taken and cross-wound to form several braided steel wire segments 8;

[0038] S5, twisting stage: the steel wire segment 8 is spirally wound on the positioning tube 2 by a twisting machine into an even number of layers to form a steel wire segment layer 9, and 15-20 steel wire segments 8 are taken in each layer;

[0039] S6, fixing and forming stage: the basalt fiber 1 obtained in S2 is uniformly coated on the outside of the steel wire segment layer 9 along the central axis of the positioning tube 2, and then heated and cured by a curing and forming device to obtain a basalt fiber composite reinforcement.

[0040] In S3, there are four reinforcing blocks 3, and a clamping block 6 and a connecting block 4 are arranged at one end of the reinforcing block 3, and a clamping block 6 and a connecting groove 5 are arranged at the other end. The cross section of the reinforcing block 3 is quasi-triangular, and a clamping groove 7 for connecting the clamping block 6 is provided on the inner wall of the positioning tube 2; the reinforcing blocks 3 are connected to each other through the connecting block 4 and the connecting groove 5 to form a structure with a square cross section, and the square structure is inserted into the clamping groove 7 through the clamping block 6. In the production process of the basalt fiber composite bar of the present invention, the reinforcing blocks 3 are assembled and connected with each other through the connecting block 4 and the connecting groove 5, and then the clamping block 6 on the reinforcing block 3 is inserted into the clamping groove 7 in the positioning tube 2. The cross section of the reinforcing block 3 is quasi-triangular, so that the stability and strength are high. The four reinforcing blocks 3 are connected and assembled together and inserted into the positioning tube 2, which can enhance the overall strength of the basalt fiber composite bar, and the connection between the clamping block 6 and the clamping groove 7 can prevent the reinforcing block 3 from shaking in the positioning tube 2, thereby enhancing the stability.

[0041] A filling layer 10 is provided between the square structure and the inner wall of the positioning tube 2 , and the filling layer 10 is made of a flame retardant material, which can further improve the stability of the square structure in the positioning tube 2 .

[0042] In S5, the number of winding layers of the steel wire segment layer 9 is two, and the winding directions of the two layers are opposite; the angle between the steel wire segment 8 spirally wound on the positioning tube 2 and the axis of the positioning tube 2 is 45-55°. In the present invention, a steel wire segment layer 9 is formed by spirally winding a steel wire segment 8 on a positioning tube 2 in an even number of layers through a twisting machine. Compared with the basalt fiber composite reinforcement in the prior art, the steel wire segment layer 9 replaces part of the basalt fiber 1 or other components in the basalt fiber composite reinforcement in the prior art. The expansion change of the steel wire segment layer 9 in an alternating hot and cold environment is smaller than the change range of the basalt fiber 1 and the resin matrix, so the lateral expansion coefficient of the produced basalt fiber composite reinforcement can be effectively reduced. Therefore, the lateral thermal expansion coefficient of the produced basalt fiber composite reinforcement is reduced, and the reduced lateral thermal expansion coefficient is closer to the longitudinal thermal expansion coefficient, thereby effectively reducing the occurrence of cracks in the basalt fiber composite reinforcement in a hot and cold environment. In addition, the number of layers of the steel wire segment layer 9 is set to two layers, which can increase the overall strength of the basalt fiber composite reinforcement and can withstand higher pressure. At the same time, the opposite winding directions of the two layers can ensure uniform pressure resistance of the positioning tube 2.

[0043] In S1, the resin matrix is ​​selected from at least one of epoxy resin, vinyl ester resin, phenolic resin, polyimide resin, bismaleimide resin, urea-formaldehyde resin, melamine resin and formaldehyde resin.

[0044] The resin matrix is ​​bisphenol A modified epoxy vinyl ester resin.

[0045] In S6, the curing molding device is pressurized to 0.5-1.5 MPa, the temperature is raised to 110-130° C., and the reaction time is fixed at 1-1.5 h.

[0046] Compared with the prior art, the production process of the basalt fiber composite bar of the present invention is to prepare the basalt fiber 1 based on the good chemical stability, thermal stability and mechanical strength of the basalt fiber 1, and then set the steel wire segment layer 9, the positioning tube 2 and the reinforcement block 3 in the basalt fiber 1 after being impregnated with a resin matrix, so that the composite basalt fiber composite bar also has strong mechanical properties, and the difference between the longitudinal thermal expansion coefficient and the transverse thermal expansion coefficient is small, thereby reducing the phenomenon of cracks in the basalt fiber composite bar due to changes in ambient temperature, and can be widely used in industrial, civil and other construction industries, petroleum industry and aviation industry, etc.; the present invention has a simple and reasonable structure, is easy to manufacture, is easy to operate, avoids the defects of the prior art, and is suitable for popularization and application.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A production process of basalt fiber composite reinforcement, characterized in that: The following steps are involved: S1, preparation stage: preparing a number of basalt fibers (1), a number of steel wires, a positioning tube (2), a number of reinforcement blocks (3) and a resin matrix; S2, resin matrix impregnation stage: adding an accelerator and a curing agent into the resin matrix in sequence, and stirring the mixture to obtain a glue solution, and then using a tool to apply the glue solution to the basalt fiber (1) and the steel wire, the number of times of application being 1-11 times; S3, assembly stage: assembling and connecting the reinforcing blocks (3) and the reinforcing blocks (3) through the connecting blocks (4) and the connecting grooves (5), and then inserting the clamping blocks (6) on the reinforcing blocks (3) into the clamping grooves (7) in the positioning tubes (2); S4, steel wire winding stage: 2-6 steel wires prepared in S2 are taken and intertwined to form a plurality of braided steel wire segments (8); S5, twisting stage: the steel wire segments (8) are spirally wound on the positioning tube (2) by a twisting machine to form steel wire segment layers (9), and 15-20 steel wire segments (8) are taken in each layer; S6, fixing and forming stage: the basalt fiber (1) obtained in S2 is uniformly wrapped around the steel wire segment layer (9) along the central axis of the positioning tube (2), and then heated and cured by a curing and forming device to obtain a basalt fiber composite reinforcement.

2. The production process of a basalt fiber composite bar according to claim 1, characterized in that: In the S3, the number of the reinforcing blocks (3) is four, and a clamping block (6) and a connecting block (4) are arranged at one end of the reinforcing block (3), and a clamping block (6) and a connecting groove (5) are arranged at the other end. The cross section of the reinforcing block (3) is quasi-triangular, and a clamping groove (7) for connecting the clamping block (6) is provided on the inner wall of the positioning tube (2); the reinforcing blocks (3) and the reinforcing blocks (3) are connected to each other through the connecting block (4) and the connecting groove (5) to form a structure with a square cross section, and the square structure is inserted into the clamping groove (7) through the clamping block (6).

3. The production process of basalt fiber composite reinforcement according to claim 2, characterized in that: A filling layer (10) is provided between the square structure and the inner wall of the positioning tube (2), and the filling layer (10) is made of a flame retardant material.

4. The production process of a basalt fiber composite bar according to claim 1, characterized in that: In the above-mentioned S5, the number of winding layers of the steel wire segment layer (9) is two, and the winding directions of the two layers are opposite.

5. The production process of basalt fiber composite reinforcement according to claim 1 or 4, characterized in that: The angle between the steel wire segment (8) spirally wound on the positioning tube (2) and the axis of the positioning tube (2) is 45-55°.

6. The production process of basalt fiber composite reinforcement according to claim 1, characterized in that: In S1, the resin matrix is ​​selected from at least one of epoxy resin, vinyl ester resin, phenolic resin, polyimide resin, bismaleimide resin, urea-formaldehyde resin, melamine resin and formaldehyde resin.

7. The production process of basalt fiber composite reinforcement according to claim 6, characterized in that: The resin matrix is ​​bisphenol A modified epoxy vinyl ester resin.

8. The production process of basalt fiber composite reinforcement according to claim 1, characterized in that: In S6, the curing molding device is pressurized to 0.5-1.5 MPa, the temperature is raised to 110-130° C., and the reaction time is fixed at 1-1.5 h.

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