Preparation method of carbon fiber support arm for yacht flying bridge

Abstract

The invention relates to a preparation method of a carbon fiber support arm for a yacht flying bridge. The preparation method comprises the following steps: firstly, cleaning a mold, preparing a resin mixed solution, then infiltrating fiber cloth in batches, preparing a first carbon cloth combination and a second carbon cloth combination, respectively paving the first carbon cloth combination and the second carbon cloth combination on a foam assembly, and then closing the mold, pressurizing, curing and molding. The prepared composite material yacht flying bridge supporting arm can be integrally formed, is good in structural integrity, uniform in resin infiltration, free of poor and rich resin, interlayers and the like, free of bumps after curing and good in mechanical property and corrosion resistance, and the product quality is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of ship technology, in particular to a method for preparing a carbon fiber support arm for a yacht flybridge, and in particular to a method for preparing a carbon fiber composite material support arm for a yacht flybridge. Background Art

[0002] Composite materials are usually made of high-strength fibers and resin matrices, and have the characteristics of light weight, high strength, and corrosion resistance. Compared with aluminum alloy structures, composite arms can significantly reduce the weight and center of gravity of yachts, and improve navigation stability, cargo capacity, and fuel efficiency.

[0003] As one of the important components of the yacht flybridge structure, the arm plays an important role in bearing and transmitting loads. The arm is a sandwich foam core structure with closed sides, with wire pipes embedded inside and metal joints embedded at both ends for connection with the flybridge top and bulwark.

[0004] At present, the most common molding method for hull composite material structural parts is vacuum infusion process. The vacuum infusion process is simple, but the pressure is too low, and it is difficult to control the resin content, which is prone to resin deficiency and resin enrichment, resulting in unqualified product quality. In particular, the structure of the yacht flybridge is a foam sandwich structure, and carbon tubes need to be laid inside for cables to pass through. With vacuum infusion, the resin is easy to flow into the foam box and carbon tube, causing quality defects. Summary of the invention

[0005] The purpose of the present invention is to provide an improved method for preparing a carbon fiber support arm for a yacht flybridge. By improving the method, the defect problem of poor resin or rich resin is avoided and the product quality is improved.

[0006] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is: a method for preparing a carbon fiber support arm for a yacht flying bridge, characterized in that: the preparation method comprises the following steps: S1: cleaning the mold surface and pre-treating the surface with a demolding medium; S2: preparing the resin, mixing the resin and the curing agent, stirring evenly with an electric stirrer, and then putting the above-mentioned mixture into a degassing machine for degassing to form a resin mixture for standby use; S3: placing the fiber cloth on a clean plane in turn, dipping the prepared resin mixture with a brush to soak the entire fiber cloth, and scraping off the excess resin mixture on the fiber cloth with a scraper, and then dividing the impregnated and laid fiber cloth into a first carbon cloth combination and a second carbon cloth combination, and covering the surface of the carbon cloth combination with a clean film; S4: laying the fiber cloths in the first carbon cloth combination on the foam component in turn, and the laying adopts a docking form, and the fiber cloths are The butt joint between the two is ≤3mm; S5: the foam component with the first carbon cloth combination is turned over 180°, and then the fiber cloth of the second carbon cloth combination is laid on the other side of the foam component in sequence, and the laying adopts the butt joint form, and the butt joint between the fiber cloths is ≤3mm; S6: the arm assembly after laying is placed into the cavity of the lower mold of the arm, the upper mold of the arm is installed, the upper and lower molds of the arm are positioned by bolts, and the pressure is increased to the first pressure range, and the upper and lower molds of the arm are sent to the drying room for curing; S7: the product is heated in the drying room for pre-curing and post-curing, and the heating rate is 5℃ / min. After curing, the film is demolded to obtain the carbon fiber arm.

[0007] Preferably, in step S2, 70-120 parts by weight of a resin is mixed with 20-40 parts by weight of a resin curing agent; the resin is a mixture of 60-90% by weight of a bisphenol A epoxy resin or a bisphenol F epoxy resin and 10-40% by weight of diglycidyl tetrahydrophthalate or diglycidyl hexahydrophthalate.

[0008] Furthermore, in step S3, the following sub-steps are provided: S31: laying the first layer of fiber cloth on the film, the fiber direction of the fiber cloth forms an angle of 0 degree or 90 degree with the horizontal plane, flattening the fiber cloth, using a brush to dip the prepared resin mixture to soak the entire fiber cloth, and using a scraper to scrape off excess resin on the fiber cloth; laying the second layer of fiber cloth, the fiber direction of the fiber cloth forms an angle of ±45 degree with the horizontal plane; laying the third layer of fiber cloth, the fiber direction of the fiber cloth forms an angle of 0 degree or 90 degree with the horizontal plane; laying the fourth layer of fiber cloth, the fiber direction of the fiber cloth forms an angle of 0 degree or 90 degree with the horizontal plane ; Lay the 5th layer of fiber cloth, the fiber direction of the fiber cloth is at an angle of 0 or 90 degrees to the horizontal plane; Lay the 6th layer of fiber cloth, the fiber direction of the fiber cloth is at an angle of ±45 degrees to the horizontal plane; S32: Repeat the above step S31, impregnate and lay the fiber cloth in sequence, and then use the impregnated and laid 5-8 layers of fiber cloth as the first carbon cloth combination, and cover the surface of the first carbon cloth combination with a clean film; S33: Repeat the steps of S31, impregnate and lay the fiber cloth in sequence, and then use the impregnated and laid 5-8 layers of fiber cloth as the second carbon cloth combination, and cover the surface of the second carbon cloth combination with a clean film. In step S3, the fiber cloth is a biaxial warp knitted fabric of carbon fiber.

[0009] Furthermore, in step S4, the foam component is a PVC foam sandwich structure. In step S6, the first pressure range is 5-8 bar.

[0010] Furthermore, in step S7, the product is heated twice using a drying room, corresponding to pre-curing and post-curing respectively. The first heating temperature ranges from 40 to 60°C for 1.5 hours; the second heating temperature ranges from 65 to 85°C for 3 hours.

[0011] Compared with the prior art, the technical solution of the present invention not only improves the overall technical solution, but also includes many improvements in details. Specifically, it has the following beneficial effects: 1. The improved solution of the present invention is to lay the fiber cloth on a clean plane in turn, dip the prepared resin mixture with a brush to soak the entire fiber cloth, and scrape off the excess resin mixture on the fiber cloth with a scraper, and then divide the impregnated and laid fiber cloth into a first carbon cloth combination and a second carbon cloth combination, and cover the surface of the carbon cloth combination with a clean film, so as to solve the problem of uneven resin infiltration, pores, delamination, bulging and the like in the molding process of the composite material yacht flybridge support arm, and improve the molding quality of the support arm; 2. In the technical solution of the present invention, the fiber cloths in the first carbon cloth combination are laid on the foam component in sequence, and the laying adopts the butt joint form, and the butt joint seam between the fiber cloths is ≤3mm; then the foam component with the first carbon cloth combination is turned 180°, and then the fiber cloths of the second carbon cloth combination are laid on the other side of the foam component in sequence, and the laying adopts the butt joint form, and the butt joint seam between the fiber cloths is ≤3mm, which prevents the resin from flowing into the carbon tube of the foam box, improves the quality of the product, and avoids defects; 3. In the process of the present invention, a secondary heating curing method is adopted to avoid excessively high temperature when the resin and fiber react, reduce the risk of arm bulging, and improve product quality; 4. The process steps of the present invention are simple and easy to implement, which can significantly improve product quality and is convenient for promotion and utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a process flow chart of the present invention.

[0013] Figure 2 It is a schematic structural diagram of the carbon fiber support arm of the present invention.

[0014] Reference numerals: 1 foam component, 2 carbon fiber arms. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] The present invention provides a method for preparing a carbon fiber support arm for a yacht flybridge. Figure 1, which is different from the prior art in that: the preparation method comprises the following steps: S1: cleaning the mold surface and pre-treating the surface with a demoulding medium; S2: preparing the resin, mixing the resin and the curing agent, stirring evenly with an electric stirrer, and then putting the above-mentioned mixture into a degassing machine for degassing to form a resin mixture for standby use; S3: placing the fiber cloth on a clean plane in turn, dipping the prepared resin mixture with a brush to soak the entire fiber cloth, and scraping off the excess resin mixture on the fiber cloth with a scraper, and then dividing the impregnated and laid fiber cloth into a first carbon cloth combination and a second carbon cloth combination, and covering the surface of the carbon cloth combination with a clean film; S4: laying the fiber cloths in the first carbon cloth combination on the foam component 1 in turn, and the laying adopts a butt-jointed form, and the fiber cloths are connected to each other. The butt joint between the two is ≤3mm; S5: the foam component with the first carbon cloth combination is turned over 180°, and then the fiber cloth of the second carbon cloth combination is laid on the other side of the foam component in sequence, and the laying adopts the butt joint form, and the butt joint between the fiber cloths is ≤3mm; S6: the laid arm assembly is placed into the cavity of the lower mold of the arm, the upper mold of the arm is installed, the upper and lower molds of the arm are positioned by bolts, and the pressure is increased to the first pressure range, and the upper and lower molds of the arm are sent to the drying room for curing; S7: the product is heated in the drying room for pre-curing and post-curing, and the heating rate is 5℃ / min. After curing, the film is demolded to obtain the carbon fiber arm 2.

[0017] In practice, the present invention adopts wet hand lay-up dipping and molding to form, and lays out the first carbon cloth combination and the second carbon cloth combination respectively, which solves the problem of uneven resin infiltration, pores, delamination, bulging and other phenomena in the forming process of the composite material yacht flybridge support arm, and improves the forming quality of the support arm. At the same time, the secondary heating and curing method is adopted to avoid the excessive temperature when the resin and fiber react, and reduce the risk of support arm bulging.

[0018] Example 1

[0019] In this embodiment, the preparation method includes the following steps: S1: cleaning the mold surface, pre-treating the surface with a demoulding medium, and using a demoulding agent of specification NC55 produced by Henkel; S2: preparing the resin, mixing the resin and the curing agent, stirring evenly with an electric stirrer, and then putting the above-mentioned mixture into a degassing machine for degassing to form a resin mixture for standby use; S3: placing the fiber cloth on a clean plane in turn, dipping the prepared resin mixture with a brush to soak the entire fiber cloth, and scraping off the excess resin mixture on the fiber cloth with a scraper, and then dividing the impregnated and laid fiber cloth into a first carbon cloth combination and a second carbon cloth combination, and covering the surface of the carbon cloth combination with a clean film; S4: The fiber cloths in the combination are laid on the foam component in sequence, and the laying adopts the butt-jointing form, and the butt joints between the fiber cloths are ≤3mm; S5: the foam component laid with the first carbon cloth combination is turned over 180°, and then the fiber cloths of the second carbon cloth combination are laid on the other side of the foam component in sequence, and the laying adopts the butt joint form, and the butt joints between the fiber cloths are ≤3mm; S6: the laid arm assembly is placed into the cavity of the lower mold of the arm, the upper mold of the arm is installed, the upper and lower molds of the arm are positioned by bolts, and the pressure is increased to the first pressure range, and the upper and lower molds of the arm are sent to the drying room for curing; S7: the product is heated in the drying room for pre-curing and post-curing, and the heating rate is 5℃ / min. After curing, the film is demolded to obtain a carbon fiber arm.

[0020] Specifically, in step S2, 70-120 parts by weight of a resin (specifically, an epoxy resin of model TECHSTORM180 produced by Daoshengtian) and 20-40 parts by weight of a resin (specifically, an epoxy resin curing agent of model TECHSTORM185 produced by Daoshengtianhe) are mixed; the resin is a mixture of 60-90% by weight of a bisphenol A epoxy resin or a bisphenol F epoxy resin and 10-40% by weight of diglycidyl tetrahydrophthalate or diglycidyl hexahydrophthalate.

[0021] In step S3, the following sub-steps are provided: S31: Laying the first layer of fiber cloth on the film, the fiber direction of the fiber cloth forms an angle of 0 or 90 degrees with the horizontal plane, flattening the fiber cloth, using a brush to dip the prepared resin mixture to soak the entire fiber cloth, and using a scraper to scrape off excess resin on the fiber cloth; laying the second layer of fiber cloth, the fiber direction of the fiber cloth forms an angle of ±45 degrees with the horizontal plane; laying the third layer of fiber cloth, the fiber direction of the fiber cloth forms an angle of 0 or 90 degrees with the horizontal plane; laying the fourth layer of fiber cloth, the fiber direction of the fiber cloth forms an angle of 0 or 90 degrees with the horizontal plane ; Lay the fifth layer of fiber cloth, the fiber direction of the fiber cloth is at an angle of 0 or 90 degrees to the horizontal plane; Lay the sixth layer of fiber cloth, the fiber direction of the fiber cloth is at an angle of ±45 degrees to the horizontal plane; S32: Repeat the above step S31, impregnate and lay the fiber cloth in sequence, and then use the impregnated and laid 6 layers of fiber cloth as the first carbon cloth combination, and cover the surface of the first carbon cloth combination with a clean film; S33: Repeat the steps of S31, impregnate and lay the fiber cloth in sequence, and then use the impregnated and laid 6 layers of fiber cloth as the second carbon cloth combination, and cover the surface of the second carbon cloth combination with a clean film. In step S3, the fiber cloth is a biaxial warp knitted fabric of carbon fiber.

[0022] Further, in step S31, a brush is used to dip the prepared resin mixture and apply it in a circular motion from the center of the fiber cloth to soak the entire fiber cloth, and then a scraper is used to scrape off the excess resin on the fiber cloth, and the fiber cloth is placed on a turntable for 1-2 minutes of high-speed rotation (800 rpm) to ensure uniform distribution of the resin. After paving the second layer of fiber cloth, a brush is also used to dip the prepared resin mixture and apply it from the center of the fiber cloth to soak the entire fiber cloth, and then a scraper is used to scrape off the excess resin on the fiber cloth, and the fiber cloth is placed on a turntable for 1-2 minutes of high-speed rotation (400-600 rpm), and the layers are laid in sequence to ensure uniform distribution of the resin, while reducing pores and improving the quality of subsequent finished products. At the same time, when smearing in a circle here, the fiber cloth is smeared thicker in the middle and thinner at the edge, and the ratio of the thickness of the two is 2:1.5-1.6.

[0023] Furthermore, in step S4, the foam component is a PVC foam sandwich structure (using a foam sandwich material of model P60 produced by Changzhou Tiansheng New Materials). In step S6, the first pressure range is 5-8 bar. In step S7, the product is heated twice using a drying room, corresponding to pre-curing and post-curing, respectively. The first heating temperature ranges from 40 to 60°C, preferably 55 degrees, and the time is 1.5 hours; the second heating temperature ranges from 65 to 85°C, preferably 78 degrees, and the time is 3 hours.

[0024] Example 2

[0025] In this embodiment, the preparation method includes the following steps: S1: cleaning the mold surface and pre-treating the surface with a demolding medium; S2: preparing the resin, mixing the resin and the curing agent, stirring evenly with an electric mixer, and then placing the above-mentioned mixture into a degassing machine for degassing to form a resin mixture for standby use; S3: placing the fiber cloth on a clean plane in turn, dipping the prepared resin mixture with a brush to soak the entire fiber cloth, and scraping off the excess resin mixture on the fiber cloth with a scraper, and then dividing the impregnated and laid fiber cloth into a first carbon cloth combination and a second carbon cloth combination, and covering the surface of the carbon cloth combination with a clean film; S4: laying the fiber cloth in the first carbon cloth combination on the foam component in turn, and the laying adopts a butt-jointed form, and the fiber cloths are The butt joint between the two is ≤3mm; S5: the foam component with the first carbon cloth combination is turned over 180°, and then the fiber cloth of the second carbon cloth combination is laid on the other side of the foam component in sequence, and the laying adopts the butt joint form, and the butt joint between the fiber cloths is ≤3mm; S6: the arm assembly after laying is placed into the cavity of the lower mold of the arm, the upper mold of the arm is installed, the upper and lower molds of the arm are positioned by bolts, and the pressure is increased to the first pressure range, and the upper and lower molds of the arm are sent to the drying room for curing; S7: the product is heated in the drying room for pre-curing and post-curing, and the heating rate is 5℃ / min. After curing, the film is demolded to obtain the carbon fiber arm.

[0026] In step S2, 75 parts by weight of resin and 25 parts by weight of resin curing agent are mixed; the resin is a mixture of 70% by weight of bisphenol A epoxy resin and 30% by weight of diglycidyl tetrahydrophthalate.

[0027] The fiber cloth in S3 is a biaxial warp knitted fabric of carbon fiber, and the direction of its fibers to the horizontal plane is divided into ±45 degree direction or 0 / 90 degree direction.

[0028] The composite material yacht flybridge support arm prepared by this embodiment can be integrally formed, has good structural integrity, is evenly infiltrated with resin, has no rich or poor resin, no interlayer, etc., has no bulging after curing, and has good mechanical properties and corrosion resistance.

[0029] The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to the above descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the scope of protection of the present invention.

Claims

1. A method for preparing a carbon fiber support arm for a yacht flybridge, characterized in that: The preparation method comprises the following steps: S1: cleaning the mold surface and pre-treating the surface with a demoulding medium; S2: Prepare the resin, mix the resin and the curing agent, stir them evenly with an electric stirrer, and then put the mixed liquid into a degassing machine for degassing to form a resin mixed liquid for standby use; S3: Lay the fiber cloths flat on a clean plane in turn, dip the prepared resin mixture with a brush to soak the entire fiber cloth, and scrape off the excess resin mixture on the fiber cloth with a squeegee, then divide the impregnated and laid fiber cloths into a first carbon cloth combination and a second carbon cloth combination, and cover the surface of the carbon cloth combination with a clean film; S4: Laying the fiber cloths in the first carbon cloth combination on the foam component in sequence, and the laying is in a butt-jointed manner, and the butt joints between the fiber cloths are ≤3 mm; S5: flip the foam component with the first carbon cloth combination paved thereon by 180°, and then sequentially pave the fiber cloth of the second carbon cloth combination on the other side of the foam component, in a butt-jointed manner, with the butt joint between the fiber cloths being ≤3mm; S6: Place the completed arm assembly into the cavity of the lower mold of the arm, install the upper mold of the arm, position the upper and lower molds of the arm by bolts, pressurize to the first pressure range, and send the upper and lower molds of the arm into the drying room for curing; S7: The product is heated in a drying room for pre-curing and post-curing at a heating rate of 5°C / min. After curing, the film is removed to obtain a carbon fiber support arm.

2. The method for preparing a carbon fiber support arm for a yacht flying bridge according to claim 1, characterized in that: In step S2, 70-120 parts by weight of a resin and 20-40 parts by weight of a resin curing agent are mixed; the resin is a mixture of 60-90% by weight of a bisphenol A epoxy resin or a bisphenol F epoxy resin and 10-40% by weight of diglycidyl tetrahydrophthalate or diglycidyl hexahydrophthalate.

3. The method for preparing a carbon fiber support arm for a yacht flying bridge according to claim 1, characterized in that: In step S3, there are the following sub-steps: S31: Laying the first layer of fiber cloth on the film, the fiber direction of the fiber cloth forms an angle of 0 degree or 90 degree with the horizontal plane, flattening the fiber cloth, using a brush to dip the prepared resin mixture to soak the entire fiber cloth, and scraping off the excess resin on the fiber cloth with a squeegee; laying the second layer of fiber cloth, the fiber direction of the fiber cloth forms an angle of ±45 degree with the horizontal plane; laying the third layer of fiber cloth, the fiber direction of the fiber cloth forms an angle of 0 degree or 90 degree with the horizontal plane; laying the fourth layer of fiber cloth, the fiber direction of the fiber cloth forms an angle of 0 degree or 90 degree with the horizontal plane; laying the fifth layer of fiber cloth, the fiber direction of the fiber cloth forms an angle of 0 degree or 90 degree with the horizontal plane; laying the sixth layer of fiber cloth, the fiber direction of the fiber cloth forms an angle of ±45 degree with the horizontal plane; S32: repeating the above step S31, impregnating and laying the fiber cloth in sequence, and then using the impregnated and laid 5-8 layers of fiber cloth as a first carbon cloth combination, and covering the surface of the first carbon cloth combination with a clean film; S33: repeating the step of S31, impregnating and laying the fiber cloth in sequence, and then using the impregnated and laid 5-8 layers of fiber cloth as the second carbon cloth combination, and covering the surface of the second carbon cloth combination with a clean film.

4. The method for preparing a carbon fiber support arm for a yacht flying bridge according to claim 1, characterized in that: In step S3, the fiber cloth is a biaxial warp knitted fabric of carbon fiber.

5. The method for preparing a carbon fiber support arm for a yacht flying bridge according to claim 1, characterized in that: In step S4, the foam component is a PVC foam sandwich structure.

6. The method for preparing a carbon fiber support arm for a yacht flying bridge according to claim 1, characterized in that: In step S6, the first pressure range is 5 to 8 bar.

7. The method for preparing a carbon fiber support arm for a yacht flying bridge according to claim 1, characterized in that: In step S7, the product is heated twice using a drying room, corresponding to pre-curing and post-curing respectively. The first heating temperature ranges from 40 to 60°C for 1.5 hours; the second heating temperature ranges from 65 to 85°C for 3 hours.

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