WO2014005397A1 - 碳纤维复合材料臂架、其生产方法及包括其的混凝土泵车 - Google Patents
碳纤维复合材料臂架、其生产方法及包括其的混凝土泵车 Download PDFInfo
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- WO2014005397A1 WO2014005397A1 PCT/CN2012/085833 CN2012085833W WO2014005397A1 WO 2014005397 A1 WO2014005397 A1 WO 2014005397A1 CN 2012085833 W CN2012085833 W CN 2012085833W WO 2014005397 A1 WO2014005397 A1 WO 2014005397A1
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- WIPO (PCT)
- Prior art keywords
- carbon fiber
- airbag
- state
- transition component
- fiber composite
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
- B29C70/446—Moulding structures having an axis of symmetry or at least one channel, e.g. tubular structures, frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
- B29C70/443—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding and impregnating by vacuum or injection
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
- E04G21/0418—Devices for both conveying and distributing with distribution hose
- E04G21/0445—Devices for both conveying and distributing with distribution hose with booms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/12—Rigid pipes of plastics with or without reinforcement
- F16L9/123—Rigid pipes of plastics with or without reinforcement with four layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2063/00—Use of EP, i.e. epoxy resins or derivatives thereof, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/0872—Prepregs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2307/00—Use of elements other than metals as reinforcement
- B29K2307/04—Carbon
Definitions
- the present invention relates to the field of concrete pumping, and more particularly to a carbon fiber composite boom, a method of producing the same, and a concrete pump truck including the same.
- BACKGROUND OF THE INVENTION More and more concrete transportation work is currently being carried out using concrete pump trucks. Concrete pumping equipment is undergoing a huge transformation, and is developing in the direction of light weight and ultra-long.
- Concrete pumping equipment is undergoing a huge transformation, and is developing in the direction of light weight and ultra-long.
- the design level of concrete pump trucks has become more and more mature. It is difficult to achieve a huge breakthrough only by reducing the weight of pump truck products from the perspective of structural design.
- technicians With the deepening of research, technicians have found the following shortcomings in traditional pump products: (1) The steel used is dense and its own weight is large, making it difficult to achieve weight reduction of pump products;
- a method for manufacturing a carbon fiber composite material boom for a concrete pump truck is disclosed, and a core mold is provided, which is a hollow structure, and a raw material for manufacturing a carbon fiber boom is placed on the core.
- a vacuum film On the outer surface of the mold, the outside of the raw material is covered with a vacuum film, and both ends of the vacuum film are sealed at both ends of the core mold, and a vacuum hole is provided on the vacuum film, and the entire mold is placed in the autoclave, pressurized with compressed air, and used for electricity.
- the heating tube is heated and solidified.
- the equipment cost and the processing cost are both high, which is not advantageous for large-scale promotion.
- the object of the present invention is to overcome the deficiencies of the prior art and provide a method for producing a carbon fiber composite boom and a carbon fiber composite boom and concrete pump truck produced thereby, thereby reducing equipment cost and processing cost.
- a method for producing a carbon fiber composite boom comprising the steps of: Sl, preliminary setting: inflating into a retractable airbag to form an airbag having a first state, in a first state
- the carbon fiber prepreg is placed on the outer surface of the airbag to obtain the first transition component
- the method further comprises the following steps: S21, one-time compression setting: the first transition component is placed in a vacuum bag to seal, and the vacuum bag is vacuumed, and the carbon fiber prepreg is vacuumed in the vacuum bag. Performing the first compression setting to obtain the intermediate transition component; S22, secondary compression setting: placing the intermediate transition component into the interior of the box mold, and inflating the interior of the airbag having the first state to form the airbag having the second state; The carbon fiber prepreg is subjected to a second compression setting to obtain a second transition component.
- the gas pressure in the airbag having the first state is 0.1 MPa 0.3 MPa; in step S21, the vacuum bag is evacuated to a pressure of 0.1 MPa 0.07 MPa; and the gas pressure in the airbag having the second state in step S22 is 0.6MPa 0.8MPa
- the step of heat-shrinking the second transition component is further included, and the step of heat-shrinking is: keeping the second transition component at 40 ° C and 70 ° C Hold pressure for 30 minutes.
- the step of heating and solidifying the second transition component is: the second transition component is heat-treated at 100 ° C and 180 ° C for 2-8 hours.
- the step of heating and solidifying the second transition component in the above step S3 is: S41, primary curing: slowly heating the second transition component to 100 ° C 120 ° C, heat treatment for 12 hours; S42, secondary curing : The second transition component after completion of one curing is slowly heated to 150 ° C 180 ° C, and the heat treatment is 23 hours; Further, in the above step S1, the method further includes: S11, spraying the release agent on the outer surface of the airbag having the first state; S12, placing the carbon fiber prepreg on the outer surface of the airbag having the first state sprayed with the release agent on.
- the method further includes: S13, sequentially laying a release cloth, a perforated separator, and an airfelt on the outer surface of the carbon fiber prepreg laid on the outer surface of the airbag having the first state, forming The first transition component.
- the method further comprises: pre-burying the metal connector in a corresponding position of the carbon fiber prepreg to form the carbon fiber boom.
- an adhesive is applied to the joint of the metal connecting member and the carbon fiber prepreg cured product, and dried to obtain a carbon fiber boom.
- a carbon fiber composite boom which is prepared by the above method.
- a concrete pump truck in which a boom is provided, which is the above-described carbon fiber composite boom.
- Advantageous Effects of Invention In the production method of the carbon fiber composite material boom provided by the present invention, the carbon fiber prepreg structure is more compact, and the carbon fiber composite material boom having excellent performance is favored. In the production method of the carbon fiber boom, the production of the carbon fiber boom can be completed by using simple equipment, including a retractable airbag, a box mold, and an oven, without using an autoclave, thereby reducing equipment cost and production cost.
- the present invention has other objects, features and advantages.
- Fig. 1 is a cross-sectional structural view showing a carbon fiber composite boom according to an embodiment of the present invention.
- DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings in the embodiments of the present invention.
- the invention can be embodied in a multitude of different ways as defined and covered by the claims.
- prepreg means a prepreg formed by mixing and impregnating a fibrous material having a weight content of 50 to 70% with a resin material having a weight content of 30 to 50%, wherein the fibrous material includes, but is not limited to, carbon fiber, A combination of one or more fibers such as aramid fibers; resin materials include, but are not limited to, epoxy resins, unsaturated resins, and phenolic resins.
- the "carbon fiber prepreg" used in the present invention may be produced by a production method in the prior art.
- a method for producing a carbon fiber composite boom comprises the following steps: Sl, preliminary setting: inflating into a retractable airbag to form an airbag having a first state, having a first state
- the carbon fiber prepreg is placed on the outer surface of the airbag to obtain the first transition component S2, and the compression setting is performed: the intermediate transition component is placed inside the box mold, and the inside of the airbag having the first state is further inflated to form the second state.
- the preliminary setting step can lay out the carbon fiber prepreg with moderate thickness according to the stress state of different parts of the boom, and can carry out the pre-preg layup raising arm according to different directions.
- the mechanical properties of the frame for example, the carbon fiber prepreg is cut into strips, and the carbon fiber prepreg is staggered according to the way of laying one in the axial direction of the airbag having the first state and then laying one along the airbag having the first state. Arranged on the outer surface of the air bag having the first state.
- This preliminary shaping method is more adaptable and is beneficial to improve the mechanical properties of the formed boom.
- a box-shaped mold having a fixed structure is introduced in the step of compressing and shaping, and on the basis of the fixed structure of the box-shaped mold, the second inflating is performed in the retractable airbag.
- the outer surface of the airbag presses the carbon fiber prepreg in the direction of the inner surface of the box mold to make the structure more compact.
- the step S2 of the method for producing the carbon fiber composite boom further comprises the following steps: S21, one-time compression setting: sealing the first transition component into a vacuum bag, Vacuuming the vacuum bag, compressing the carbon fiber prepreg for the first time to obtain the intermediate transition component in the vacuum bag after vacuuming; S22, secondary compression setting: placing the intermediate transition component inside the box mold, and Further, the inside of the airbag having the first state is inflated to form an airbag having the second state; the carbon fiber prepreg is subjected to a second compression setting to obtain a second transition component.
- the compression step is carried out in two steps, and a step of using a vacuum bag is added before the use of the box mold, which uses a fixed structure of the airbag having the first state, by vacuuming
- the bag is evacuated, the vacuum bag is gradually reduced, and the carbon fiber is pressed toward the airbag having the first state.
- the prepreg is compact in structure, and the carbon fiber prepreg is gathered on the outer surface of the airbag having the first state.
- a box-shaped mold with a fixed structure will be further introduced, and on the basis of the fixed structure of the box-shaped mold, the airbag will be inflated twice, and the outer surface of the airbag will be in the process of secondary inflation.
- the carbon fiber prepreg which is gathered by the vacuum bag is pressed in the direction of the inner surface of the box mold, thereby making the carbon fiber prepreg have a more compact structure.
- the gas pressure in the airbag in the first state, the gas pressure in the airbag having the second state, and the pressure in vacuuming the vacuum bag can be confirmed according to practical applications, in the present invention
- the gas pressure of the airbag having the first state in the step S1 of the carbon fiber boom is 0.2 MPa to 0.4 MPa; and the vacuum bag is evacuated to -0.1 MPa to - 0.07 MPa in step S21;
- the gas pressure in the airbag having the second state is 0.6 MPa to 0.8 MPa.
- the step of heat-shrinking the second transition component is preferably performed before the temperature-heating curing treatment, heat-shrinking
- the steps are as follows: The second transition component is kept at 40 ° C to 70 ° C for 30 to 60 minutes.
- the carbon fiber prepreg is preheated by raising the temperature to 40 ° C to 70 ° C, so that the viscosity of the resin mixed in the carbon fiber prepreg is moderately lowered, and the internal bubbles are separated from the carbon fiber prepreg, and at the same time
- the gas is thermally expanded after the temperature rises, and the carbon fiber prepreg is pressed outward, thereby eliminating the carbon fiber prepreg bubbles, and further compacting the structure of the carbon fiber prepreg is beneficial to improving the carbon fiber composite produced.
- the strength of the material boom is
- the curing temperature required for rational analysis can be performed according to the kind of the resin to be used.
- the step of heating and solidifying the second transition component in the above step S4 is to heat-treat the second transition component at 100 ° C to 180 ° C for 2-8 hours.
- the step of performing temperature rising and curing of the second transition component in the above step S4 comprises: S41-sub-curing and S42 secondary curing.
- S41 sub-cure is to slowly raise the temperature of the second transition component to 100°C ⁇ 120°C, and heat-treat for 1 ⁇ 2 hours; S42 is secondarily cured to slowly heat up the second transition component after completing one curing to 150°C ⁇ 180 ° C, heat treatment for 2 to 3 hours.
- the carbon fiber prepreg in the second transition component is heated and solidified twice.
- the control temperature is between 100 ° C and 120 ° C, which is beneficial to promote uniform and controllable curing of the carbon fiber prepreg.
- the step S1 further includes: S11, spraying the release agent on the outer surface of the airbag having the first state; S12, laying the carbon fiber prepreg on the outer surface of the airbag having the first state sprayed with the release agent .
- step S1 in order to better perform the vacuuming process in one compression molding process, preferably, in step S1, further comprising: S13, laying on the outer surface of the airbag having the first state A release cloth, a perforated separator, and an airfelt are sequentially disposed on the outer surface of the carbon fiber prepreg to form a first transition component.
- the arrangement of the perforated separator is advantageous for forming an appropriate distance between the vacuum bag and the carbon fiber prepreg, so as to avoid the carbon fiber prepreg blocking the suction hole of the vacuum bag during vacuuming, which is favorable for the smoothing of the vacuum treatment.
- the arrangement of the airfelt is advantageous for separating the apertured separator and the vacuum bag, and the venting holes in the airfelt further facilitate the flow of the vacuum processing gas.
- the setting of the release cloth facilitates separation of the apertured separator from the carbon fiber prepreg during the cooling demolding process.
- the carbon fiber prepreg is further disposed in the process of laying the carbon fiber prepreg on the outer surface of the airbag having the first state.
- the metal connector is pre-buried in the corresponding position of the carbon fiber prepreg to form the carbon fiber composite boom.
- the pre-embedding of the metal connecting member in the carbon fiber prepreg not only reduces the step of mounting the metal connecting member on the carbon fiber composite arm frame, but also facilitates the integral forming of the metal connecting member and the carbon fiber composite arm frame. The defect point at the joint is reduced, the connection is more stable, and the service life and safety performance of the carbon fiber composite boom are improved.
- the adhesive is applied to the joint of the metal connecting member and the carbon fiber prepreg cured product after the mold is cooled and cooled in step S4, and after drying.
- a carbon fiber composite boom Adhesive is applied to the joint of the metal connector and the carbon fiber prepreg cured product to avoid electrochemical corrosion of the metal member and improve the service life and safety performance of the boom.
- the adhesive selected for use in the actual operation may be a commercially available product.
- a high-toughness adhesive is selected. The selection of the adhesive can be reasonably analyzed by those skilled in the art and will not be described herein. As shown in FIG.
- the retractable air bag 1 is first inflated by the charging and discharging port 11 of the retractable air bag 1 to form an air bag having a first state, and has a first state.
- Spraying a release agent on the outer surface of the airbag, placing the carbon fiber prepreg 2 on the outer surface of the airbag having the first state sprayed with the release agent, and pre-burying the metal connector in the carbon fiber prepreg to form carbon fiber The corresponding position of the composite boom.
- the release cloth 4, the perforated separator 5, and the airfelt 6 are sequentially laid in sequence to form a first transition assembly.
- the carbon fiber prepreg is subjected to a first compression setting under the interaction between the evacuated vacuum bag 3 and the airbag having the first state to obtain an intermediate transition component. Inserting the intermediate transition assembly into the interior of the cylindrical mold, and further inflating the interior of the airbag having the first state to form the airbag having the second state; under the interaction between the airbag having the second state and the box mold The carbon fiber prepreg is subjected to a second compression setting to obtain a second transition component, the second transition component is heated and solidified, and after solidification, the mold is cooled and coated, and the adhesive is applied to the joint of the metal connector and the carbon fiber prepreg cured product.
- the carbon fiber composite boom provided by the above method makes full use of the strength of the carbon fiber composite material to be similar to the strength of the steel, but the density is only 1/4 of the steel, and the high strength and safety of the boom are ensured. , to reduce the weight of the boom by more than 40%, which is conducive to the preparation of the long boom. At the same time, the advantages of high specific strength, high specific modulus, corrosion resistance, fatigue resistance and good designability of carbon fiber composite materials are fully utilized, and various aspects of the carbon fiber composite material boom are improved. And through reasonable setting methods, equipment costs and processing costs are greatly reduced.
- Example 1 Carbon fiber prepreg The weight of the raw material is 70% of the fiber material T300 carbon fiber produced by Japan Toray Co., Ltd. and the resin matrix based on AG-80 epoxy resin produced by Shanghai Synthetic Resin Research Institute and 30% by weight. .
- the airbag 1 is inflated by the charging and discharging port 11 of the retractable airbag 1 to form an airbag having a first state with an internal pressure of 0.3 MPa, and the airbag having the first state is formed, and has the first state.
- the carbon fiber prepreg 2 is laid on the outer surface of the airbag to form a first transition component.
- the first transition component is placed in the vacuum bag 3 to be sealed, and the vacuum bag 3 is evacuated to an internal pressure of -0.1 g. under the interaction between the evacuated vacuum bag 3 and the airbag having the first state.
- the carbon fiber prepreg is first compressed and fixed to obtain an intermediate transition component.
- the second compression assembly is performed on the carbon fiber prepreg under the interaction, and the second transition component is obtained, and the second transition component is placed in an oven and slowly heated to 40 ° C for 70 minutes, and then slowly heated to 40 ° C.
- the first curing was carried out at 100 ° C, the pressure treatment was carried out for 1 hour, the temperature was further raised to 150 ° C for the second curing, and the pressure treatment was carried out for 3 hours.
- Example 2 Carbon fiber prepreg: T700 fiber produced by Toray Co., Ltd., which is 50% by weight, and E-51 epoxy resin, which is produced by Bluestar Group Wuxi Resin Factory, with a weight content of 50%. Matrix. Production method: First, the airbag 1 of the retractable airbag 1 is inflated once to form an airbag having a first state with an internal pressure of 0.2 MPa, and the airbag having the first state is formed, and has the first state.
- AXEL's WB-411 release agent is sprayed on the outer surface of the airbag, and the carbon fiber prepreg 2 is placed on the outer surface of the airbag having the first state sprayed with the release agent, and the first transition component is placed.
- the vacuum bag 3 is sealed, and the vacuum bag 3 is evacuated to an internal pressure of -0.07 MPa, and the carbon fiber prepreg is firstly subjected to interaction between the evacuated vacuum bag 3 and the airbag having the first state.
- the secondary compression is fixed, and the intermediate transition component is obtained.
- the second compression assembly is performed on the carbon fiber prepreg under the interaction, and the second transition component is obtained.
- the second transition component is placed in an oven and slowly heated to 50 ° C for 60 minutes, and slowly heated to 100 °. C was subjected to the first curing, and the pressure-retaining treatment was carried out for 2 hours, and the temperature was further raised to 150 ° C for the second curing, and the pressure-maintaining treatment was carried out for 3 hours to carry out the second curing.
- Carbon fiber prepreg The fiber material T700 fiber produced by Toray Co., Ltd. of 60% by weight and the matrix resin mainly composed of MTM82 type phenol resin produced by ACG Co., Ltd. having a weight content of 40%.
- Production method First, the retractable air bag 1 is inflated once by the charging and discharging port 11 of the retractable air bag 1 to form an air bag having a first state with an internal pressure of 0.4 MPa, and the air bag having the first state is formed, and has the first state.
- the release agent is sprayed on the outer surface of the airbag, and the prepreg 2 is placed on the outer surface of the airbag having the first state sprayed with the release agent.
- the release cloth 4, the perforated separator 5, and the airfelt 6 are sequentially laid in sequence to form a first transition assembly.
- the first transition component is placed in the vacuum bag 3 to be sealed, and the vacuum bag 3 is evacuated to an internal pressure of 0.085 MPa, and the interaction between the evacuated vacuum bag 3 and the airbag having the first state is performed.
- the prepreg is first compressed and fixed to obtain an intermediate transition component.
- the intermediate transition assembly into a cylindrical shape Inside the mold, and further inflating the inside of the airbag having the first state to form an airbag having a second state with an internal pressure of 0.7 MPa; and pre-impregnation under the interaction between the airbag having the second state and the cylindrical mold
- the material is subjected to a second compression and fixation to obtain a second transition component, and the second transition component is placed in an oven and slowly heated to 40 ° C for 60 minutes for heat treatment, and further heat-treated to 120 ° C for curing.
- the pressure was treated for 1 h, and the temperature was further raised to 180 ° C for secondary curing, and the pressure holding treatment was 2. h. After solidification, the mold is cooled and the boom is obtained.
- Example 4 Carbon fiber prepreg: T700 fiber produced by Toray Co., Ltd., which is 50% by weight, and W-2000 epoxy resin, which is produced by Shanghai Yikang Chemical Materials Co., Ltd., with a weight content of 50%. Base resin. Production method: First, the airbag 1 is inflated by the charging and discharging port 11 of the retractable airbag 1 to form an airbag having a first state with an internal pressure of 0.3 MPa, and the airbag having the first state is formed, and has the first state.
- the release cloth 4, the perforated separator 5, and the airfelt 6 are sequentially laid on the outer surface of the carbon fiber prepreg 2 to form a first transition assembly.
- the first transition component is placed in the vacuum bag 3 to be sealed, and the vacuum bag 3 is evacuated to an internal pressure of -0.08 MPa, and the interaction between the evacuated vacuum bag 3 and the airbag having the first state is performed.
- the carbon fiber prepreg is first compressed and fixed to obtain an intermediate transition component.
- the second compression assembly is performed on the carbon fiber prepreg under the interaction, and the second transition component is obtained, and the second transition component is placed in an oven and slowly heated to 70 ° C for 40 minutes for heat treatment. Further, the temperature was further raised to 110 ° C for curing, and the pressure was treated for 1.5 hours. The temperature was further raised to 165 ° C for secondary curing, and the pressure treatment was carried out for 2.5 hours.
- the carbon fiber boom prepared by using the above Examples 1-4 is similar to the carbon fiber boom prepared by using the comparative document 1, but the production cost is remarkably reduced, and during the preparation process.
- the carbon fiber boom can be produced simply by using simple equipment, including retractable airbags, box molds and ovens. Without the use of autoclaves, equipment costs and production costs are reduced.
- the carbon fiber composite boom produced by the present invention is not only suitable for carbon fiber prepreg, but also suitable for prepregs of other materials, such as glass fiber prepreg and basalt fiber, etc., which belong to the protection scope of the present invention. .
- the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.
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- Moulding By Coating Moulds (AREA)
Abstract
本发明公开了一种碳纤维复合材料臂架、其生产方法及包括其的混凝土泵车。该碳纤维复合材料臂架的生产方法包括:向可伸缩气囊中充气,形成具有第一状态的气囊,在其外表面铺放碳纤维预浸料,获取第一过渡组件;将第一过渡组件放入箱型模具内部,向具有第一状态的气囊内部充气,对碳纤维预浸料进行压缩定型,获取第二过渡组件;将第二过渡组件进行升温固化,固化后冷却脱模获取碳纤维臂架。本发明所提供的碳纤维复合材料臂架的生产方法中通过多次定型,使得碳纤维预浸料结构更为紧凑,有利于制备性能优异的碳纤维复合材料臂架。在该碳纤维臂架的生产方法仅利用简单的设备,不使用热压罐,降低了设备成本以及生产成本。
Description
碳纤维复合材料臂架、 其生产方法及包括其的混凝土泵车 技术领域 本发明涉及混凝土泵送领域, 尤其是涉及一种碳纤维复合材料臂架、 其生产方法 及包括其的混凝土泵车。 背景技术 目前越来越多的混凝土输送工作采用混凝土泵车来完成。 混凝土泵车设备正经历 着一场巨大的变革, 正向轻量化、 超长化的方向发展。 在混凝土泵车设计水平已日趋 成熟的今天, 仅从结构设计角度来实现泵车产品的轻量化已很难实现巨大突破。 随着研究的深入, 技术人员发现传统泵车产品中存在以下不足: ( 1 ) 所使用的钢材密度较大, 自身重量较大, 难以实现泵车产品的轻量化;
(2)传统钢臂架由高强钢板拼焊而成, 高强钢板的焊接性能较差, 而且由于高强 钢板焊接性较差, 焊接处容易发生开裂, 使臂架的寿命缩短, 且容易影响施工的安全 性;
(3 )传统高强钢耐疲劳强度较低, 高强钢臂架容易出现疲劳性断裂, 难以满足轻 量及超长臂架泵车的要求;
(4) 钢制臂架的耐腐蚀性较差, 进一步影响了臂架的使用寿命。 面对于现有钢材料本身如此多的缺陷, 以新型轻质高强材料替代现广泛应用的钢 铁材料将成为泵车产品轻量化及超长化的主要突破口。 近年来, 高性能碳纤维树脂基复合材料因具有轻质、 高强、 高模、 耐腐蚀、 性能 可设计性好等优点, 能够同时满足混凝土泵车质量轻、 耐疲劳高强度等要求被作为臂 架材料使用。 以中国专利申请第 201010524104.4号为例, 其中公开了一种制造混凝土泵车用碳 纤维复合材料臂架的方法, 具体公开了设有芯模, 为中空结构, 制造碳纤维臂架的原 材料铺放在芯模外表面上, 原材料外部用真空膜包覆,真空膜两端密封在芯模的两端, 真空膜上设有抽气孔, 整个模具放入热压罐中, 利用压缩空气加压, 用电加热管进行 加热固化成型。
在上述成型方法中, 所使用的设备成本和加工成本都较高, 其并不利于大规模的 推广。 因此开发一种新的低成本的复合材料混凝土泵车臂架的制造方法是非常有意义 的。 发明内容 本发明目的在于克服现有技术不足, 提供一种碳纤维复合材料臂架的生产方法及 由其所生产的碳纤维复合材料臂架、 混凝土泵车, 以降低设备成本和加工成本。 为此, 在本发明中提供了一种碳纤维复合材料臂架的生产方法, 包括以下步骤: Sl、 初步定型: 向可伸缩气囊中充气, 形成具有第一状态的气囊, 在具有第一状态的 气囊外表面铺放碳纤维预浸料, 获取第一过渡组件; S2、 压缩定型: 将第一过渡组件 放入箱型模具内部, 并向具有第一状态的气囊内部充气, 形成具有第二状态的气囊; 对碳纤维预浸料进行压缩定型, 获取第二过渡组件; S3、 固化定型: 将第二过渡组件 进行升温固化, 固化后冷却脱模获取碳纤维臂架。 进一步地, 在上述步骤 S2进一步包括如下步骤: S21、 一次压缩定型: 将第一过 渡组件放入真空袋中密封, 并对真空袋抽真空, 在抽真空后的真空袋中对碳纤维预浸 料进行第一次压缩定型, 获取中间过渡组件; S22、 二次压缩定型: 将中间过渡组件放 入箱型模具内部, 并向具有第一状态的气囊内部充气, 形成具有第二状态的气囊; 对 碳纤维预浸料进行第二次压缩定型, 获取第二过渡组件。 进一步地,上述步骤 S1中具有第一状态的气囊中气体压力为 O. lMPa 0.3MPa; 步骤 S21中真空袋抽真空至一 0.1MPa 0.07MPa;步骤 S22中具有第二状态的气囊 中气体压力为 0.6MPa 0.8MPa 进一步地,在上述步骤 S3中升温固化处理之前还包括对第二过渡组件进行热缩的 步骤, 进行热缩的步骤为: 将第二过渡组件在 40°C 70°C下保温保压处理 30 60分 钟。 进一步地,上述步骤 S3中将第二过渡组件进行升温固化的步骤为:将第二过渡组 件在 100°C 180°C下保温处理 2-8小时。 进一步地, 上述步骤 S3中将第二过渡组件进行升温固化的步骤为: S41、 一次固 化: 将第二过渡组件缓慢升温至 100°C 120°C, 保温处理 1 2小时; S42、二次固化: 将完成一次固化后的第二过渡组件缓慢升温至 150°C 180°C, 保温处理 2 3小时;
进一步地, 上述步骤 SI中, 进一步包括: Sll、 具有第一状态的气囊外表面喷涂 脱模剂; S12、 将碳纤维预浸料铺放在喷涂有脱模剂的具有第一状态的气囊外表面上。 进一步地, 上述步骤 S1中, 进一步包括: S13、 在铺放在具有第一状态的气囊外 表面的碳纤维预浸料的外表面上依次铺设脱模布、 带孔隔离膜、 以及透气毡, 形成第 一过渡组件。 进一步地,上述步骤 S1中在具有第一状态的气囊外表面铺放碳纤维预浸料的过程 中进一步包括, 将金属连接件预埋在碳纤维预浸料形成碳纤维臂架的相应位置上。 进一步地,上述步骤 S3中冷却脱模后在金属连接件和碳纤维预浸料固化物结合处 涂抹胶黏剂, 干燥后获取碳纤维臂架。 在本发明中还提供了一种碳纤维复合材料臂架, 其由上述的方法制备而成。 在本发明中还提供了一种混凝土泵车, 其中设有臂架, 该臂架为上述的碳纤维复 合材料臂架。 本发明的有益效果: 本发明所提供的碳纤维复合材料臂架的生产方法中通过多次 定型, 使得碳纤维预浸料结构更为紧凑,有利于制备性能优异的碳纤维复合材料臂架。 在该碳纤维臂架的生产方法仅通过利用简单的设备, 包括可伸缩气囊、 箱型模具以及 烘箱即可完成碳纤维臂架的生产, 不使用热压罐, 降低了设备成本以及生产成本。 除了上面所描述的目的、特征和优点之外, 本发明还有其它的目的、特征和优点。 下面将参照图, 对本发明作进一步详细的说明。 附图说明 附图构成本说明书的一部分、 用于进一步理解本发明, 附图示出了本发明的优选 实施例, 并与说明书一起用来说明本发明的原理。 图中: 图 1示出了根据本发明实施例的碳纤维复合材料臂架的剖视结构示意图。 具体实施方式 下面将结合本发明实施例中的附图, 对本发明的实施例中的技术方案进行详细的 说明, 但如下实施例以及附图仅是用以理解本发明, 而不能限制本发明, 本发明可以 由权利要求限定和覆盖的多种不同方式实施。
在本发明名词 "预浸料"是指由重量含量为 50〜70%的纤维材料与重量含量为 30〜 50%的树脂材料混合浸渍形成的预浸料, 其中纤维材料包括但不限于碳纤维、 芳纶纤 维等一种或多种纤维的组合; 树脂材料包括但不限于环氧树脂、 不饱和树脂以及酚醛 树脂。 本发明所使用的"碳纤维预浸料 "使用现有技术中生产方法即可。 在本发明的一种典型的实施方式中, 碳纤维复合材料臂架的生产方法, 包括以下 步骤: Sl、 初步定型: 向可伸缩气囊中充气, 形成具有第一状态的气囊, 在具有第一 状态的气囊外表面铺放碳纤维预浸料, 获取第一过渡组件 S2、 压缩定型: 将中间过渡 组件放入箱型模具内部, 并进一步向具有第一状态的气囊内部充气, 形成具有第二状 态的气囊; 第二次压缩定型, 获取第二过渡组件; S3、 固化定型: 将第二过渡组件进 行升温固化, 固化后冷却脱模获取碳纤维复合材料臂架。 在上述碳纤维复合材料臂架的生产方法中, 初步定型的步骤可以根据臂架不同部 位的受力状况铺放厚度适中的碳纤维预浸料, 并可按照不同方向进行预浸料的铺层提 高臂架的力学性能, 例如将碳纤维预浸料裁制成长条形, 并依照沿具有第一状态的气 囊轴向方向铺设一条、 再沿具有第一状态的气囊铺设一条的方式将碳纤维预浸料交错 排布在具有第一状态的气囊的外表面上。 这种初步定型的方式可调节性较强, 有利于 提高所形成的臂架的力学性能。 在上述碳纤维复合材料臂架的生产方法中, 压缩定型的步骤中引入结构固定的箱 型模具, 并在箱型模具结构固定的基础上, 向可伸缩气囊中二次充气, 在二次充气的 过程中气囊的外表面向箱型模具内表面的方向压迫碳纤维预浸料使其结构更为紧凑。 在上述碳纤维复合材料臂架的生产方法中通过可伸缩气囊和箱型模具箱型模具的 配合使用, 简化了碳纤维复合材料臂架的生产过程, 消除了热压罐的使用, 降低了设 备成本以及生产成本。 在本发明的一种优选实施方式中,上述碳纤维复合材料臂架的生产方法的步骤 S2 压缩定型的过程进一步包括如下步骤: S21、一次压缩定型: 将第一过渡组件放入真空 袋中密封, 并对真空袋抽真空, 在抽真空后的真空袋对碳纤维预浸料进行第一次压缩 定型, 获取中间过渡组件; S22、 二次压缩定型: 将中间过渡组件放入箱型模具内部, 并进一步向具有第一状态的气囊内部充气, 形成具有第二状态的气囊; 对碳纤维预浸 料进行第二次压缩定型, 获取第二过渡组件。 在上述碳纤维复合材料臂架的生产方法中将压缩步骤分为两步进行, 在使用箱体 模具之前增加了使用真空袋的步骤, 该步骤利用具有第一状态的气囊的固定结构, 通 过对真空袋抽真空, 使得真空袋逐渐缩小, 并向具有第一状态的气囊方向压迫碳纤维
预浸料使其结构紧凑, 将碳纤维预浸料收拢在具有第一状态的气囊外表面上。 在此基 础上, 进一步将引入结构固定的箱型状模具, 并在箱型状模具结构固定的基础上, 向 可伸缩气囊中二次充气, 在二次充气的过程中气囊的外表面将已被真空袋收拢的碳纤 维预浸料向箱型模具内表面的方向压迫,进而使得碳纤维预浸料具有更为紧凑的结构。 在上述碳纤维复合材料臂架的生产方法中第一状态的气囊中气体压力、 具有第二 状态的气囊中气体压力以及真空袋抽真空的压力都可以根据实际应用进行确认, 在本 发明的一种优选实施方式中,上述碳纤维臂架的生产方法步骤 S1中具有第一状态的气 囊中气体压力为 0.2MPa〜0.4MPa; 步骤 S21中真空袋抽真空至 -0.1MPa〜 - 0.07MPa; 步骤 S22中具有第二状态的气囊中气体压力为 0.6MPa〜0.8MPa.。 在上述压力范围内 具有能保证预浸料的铺层稳定同时被压实的好处。 为了进一步加固本发明所制备的碳纤维复合材料臂架的强度, 在上述碳纤维复合 材料臂架的生产方法的步骤 S4 中优选在升温固化处理之前对第二过渡组件进行热缩 的步骤, 热缩的步骤为: 将第二过渡组件在 40°C〜70°C下保温保压处理 30〜60分钟。 在该过程中, 将温度升至 40°C〜70°C对碳纤维预浸料进行预热, 使得混合在碳纤维预 浸料中树脂粘度适度降低, 使其内部气泡与碳纤维预浸料脱离, 同时, 具有第二状态 的气囊中气体在升温后热胀, 向外压迫碳纤维预浸料, 进而使得碳纤维预浸料气泡排 除, 进一步紧凑碳纤维预浸料的结构, 有利于提高所制成的碳纤维复合材料臂架的强 度。 在上述碳纤维复合材料臂架的生产方法的步骤 S4 中将第二过渡组件进行升温固 化的步骤中可以根据所采用树脂的种类进行合理分析所需要的固化温度。 在本发明的 一种优选实施方式中,上述步骤 S4中将第二过渡组件进行升温固化的步骤为将第二过 渡组件在 100°C〜180°C下保温处理 2-8小时。 优选地, 上述步骤 S4中将第二过渡组件进行升温固化的步骤包括: S41—次固化 和 S42二次固化。 S41—次固化为将第二过渡组件缓慢升温至 100°C〜120°C, 保温处 理 1〜2小时; S42二次固化为将完成一次固化后的第二过渡组件缓慢升温至 150°C〜 180°C, 保温处理 2〜3小时。 在该过程中对第二过渡组件中碳纤维预浸料进行两次加 温固化, 第一次固化时, 控制温度在 100°C〜120°C, 有利于促使碳纤维预浸料均匀可 控固化, 降低固化不均所引起的所制备碳纤维复合材料臂架内应力不均衡, 同时有利 于减少因固化发热导致产生气泡或爆聚的现象; 第二次固化时, 控制温度在 150°C〜 180°C, 以进一步促进树脂交联固化, 得到较好的交联密度, 进而提高的所制备碳纤维 复合材料臂架强度。 在上述碳纤维复合材料臂架的生产方法中为了便于完成固化后的 冷却脱模处理,
优选地, 在步骤 SI中进一步包括: Sll、具有第一状态的气囊外表面喷涂脱模剂; S12、将碳纤维预浸料铺放在喷涂有脱模剂的具有第一状态的气囊外表面上。上述所采 用的脱模剂选用市面上常用的脱模剂即可, 本领域技术人员能够合理选择脱模剂的类 型, 此处不再赘述。 在上述碳纤维复合材料臂架的生产方法中为了更好地进行一次压缩成型过程中的 抽真空处理, 优选地, 在步骤 S1中进一步包括: S13、 在铺放在具有第一状态的气囊 外表面的碳纤维预浸料的外表面上依次铺设脱模布、 带孔隔离膜、 以及透气毡, 形成 第一过渡组件。带孔隔离膜的设置有利于在真空袋与碳纤维预浸料之间形成适当距离, 避免抽真空时碳纤维预浸料堵塞真空袋的抽气孔, 有利于抽真空处理的顺利进行。 透 气毡的设置有利于分离带孔隔离膜与真空袋, 透气毡中的透气孔进一步便于抽真空处 理气体的流动。 脱模布的设置有利于在冷却脱模处理过程中将带孔隔离膜与碳纤维预 浸料分离。 为了便于由上述碳纤维复合材料臂架的生产方法所制备的碳纤维复合材料臂架的 使用,优选地,上述步骤 S1中在具有第一状态的气囊外表面铺放碳纤维预浸料的过程 中进一步包括, 将金属连接件预埋在碳纤维预浸料形成碳纤维复合材料臂架的相应位 置上。 将金属连接件预埋在碳纤维预浸料内, 不但减少了将金属连接件安装在碳纤维 复合材料臂架上的步骤, 同时还有利于使得金属连接件与碳纤维复合材料臂架整体成 型, 可实现降低了连接处缺陷点, 提高连接更为稳定, 进而提高碳纤维复合材料臂架 的使用寿命及安全性能。 为了更好地提高金属连接件与碳纤维复合材料臂架的连接稳定性, 优选地, 在步 骤 S4中冷却脱模后在金属连接件和碳纤维预浸料固化物结合处涂抹胶黏剂,干燥后获 取碳纤维复合材料臂架。 在金属连接件和碳纤维预浸料固化物结合处涂抹胶黏剂, 避 免了金属件的电化学腐蚀, 提升了臂架的使用寿命及安全性能。 在实际操作中所选用的胶黏剂选用市售产品即可, 优选地, 选择高韧性胶黏剂, 对于胶黏剂的选择本领域技术人员能够合理分析, 在此不再赘述。 如图 1所示, 本发明的一种具体的实施方式中, 先通过可伸缩气囊 1的充放气口 11向可伸缩气囊 1进行一次充气, 形成具有第一状态的气囊, 在具有第一状态的气囊 的外表面上喷涂脱模剂, 将碳纤维预浸料 2铺放在喷涂有脱模剂的具有第一状态的气 囊外表面上, 并将金属连接件预埋在碳纤维预浸料形成碳纤维复合材料臂架的相应位 置上。在碳纤维预浸料 2外表面上依次铺放依次铺设脱模布 4、带孔隔离膜 5、 以及透 气毡 6形成第一过渡组件。 将第一过渡组件放入真空袋 3中密封, 并对真空袋 3抽真
空, 在抽真空后的真空袋 3与具有第一状态的气囊之间的相互作用下对碳纤维预浸料 进行第一次压缩定型, 获取中间过渡组件。 将中间过渡组件放入圆筒状模具内部, 并 进一步向具有第一状态的气囊内部充气, 形成具有第二状态的气囊; 在具有第二状态 的气囊与箱型模具之间的相互作用下对碳纤维预浸料进行第二次压缩定型, 获取第二 过渡组件, 将第二过渡组件进行升温固化, 固化后冷却脱模, 在金属连接件和碳纤维 预浸料固化物结合处涂抹胶黏剂, 干燥后获取碳纤维臂架。 由上述方法所提供的碳纤维复合材料臂架, 充分利用了碳纤维复合材料的强度与 钢的强度相近, 但密度仅为钢的 1/4的优点, 在保证臂架的高强度与安全性的同时, 使臂架的重量降低 40%以上, 有利于制备长臂架。 同时, 充分利用了碳纤维复合材料 高比强度、 高比模量、 耐腐蚀、 耐疲劳及良好的可设计性的优点, 提高了碳纤维复合 材料臂架的各方面性能。且通过合理的设置方法大幅度的降低了设备成本和加工成本。 另外, 碳纤维复合材料臂架具有良好的耐疲劳性能和耐腐蚀性能, 且碳纤维复合材料 具有良好的阻尼性能, 减小了臂架的震动, 提高了泵车的使用性能及安全性能。 具有上述碳纤维复合材料臂架的混凝土泵车, 有利于实现混凝土泵车轻量化、 超 长化的发展。。 以下将根据具体实施方式进一步说明本发明的有益效果。 实施例 1 碳纤维预浸料: 重量原料为 70%日本东丽公司生产的纤维材料 T300碳纤维和重 量含量为 30%的以上海合成树脂研究所生产的以 AG-80 环氧树脂为主的树脂基体。 生产方法: 先通过可伸缩气囊 1的充放气口 11向可伸缩气囊 1进行一次充气,形成内部压力 为 0.3MPa 的具有第一状态的气囊, 形成具有第一状态的气囊, 在具有第一状态的气 囊的外表面上铺放将碳纤维预浸料 2形成第一过渡组件。 将第一过渡组件放入真空袋 3中密封, 并对真空袋 3抽真空至内部压力为- O. lMPa,在抽真空后的真空袋 3与具有 第一状态的气囊之间的相互作用下对碳纤维预浸料进行第一次压缩固定, 获取中间过 渡组件。 将中间过渡组件放入圆筒状模具内部, 并进一步向具有第一状态的气囊内部 充气, 形成内部压力为 0.6MPa 的具有第二状态的气囊; 在具有第二状态的气囊与圆 筒状模具之间的相互作用下对碳纤维预浸料进行第二次压缩固定,获取第二过渡组件, 将第二过渡组件放入烘箱中缓慢升温至 40°C下保压处理 70 分钟, 然后缓慢升温至
100°C进行第一次固化, 保压处理 lh, 进一步升温至 150°C进行第二次固化, 保压处理 3h, 固化后冷却脱模, 干燥后获取碳纤维复合材料臂架。 实施例 2 碳纤维预浸料: 重量含量为 50%的日本东丽公司生产纤维材料 T700纤维和重量 含量为 50%的以蓝星集团无锡树脂厂生产的以 E-51环氧树脂为主的树脂基体。 生产方法: 先通过可伸缩气囊 1的充放气口 11向可伸缩气囊 1进行一次充气,形成内部压力 为 0.2MPa 的具有第一状态的气囊, 形成具有第一状态的气囊, 在具有第一状态的气 囊的外表面上喷涂 AXEL公司的 WB-411型脱模剂, 将碳纤维预浸料 2铺放在喷涂有 脱模剂的具有第一状态的气囊外表面上, 将第一过渡组件放入真空袋 3中密封, 并对 真空袋 3抽真空至内部压力为 -0.07MPa, 在抽真空后的真空袋 3与具有第一状态的气 囊之间的相互作用下对碳纤维预浸料进行第一次压缩固定, 获取中间过渡组件。 将中 间过渡组件放入圆筒状模具内部, 并进一步向具有第一状态的气囊内部充气, 形成内 部压力为 0.8MPa 的具有第二状态的气囊; 在具有第二状态的气囊与圆筒状模具之间 的相互作用下对碳纤维预浸料进行第二次压缩固定, 获取第二过渡组件, 将第二过渡 组件放入烘箱中缓慢升温至 50°C保压处理 60分钟,缓慢升温至 100°C进行第一次固化, 保压处理 2h, 进一步升温至 150°C进行第二次固化, 保压处理 3h, 进行第二次固化。 固化后冷却脱模, 获取碳纤维臂架。 实施例 3 碳纤维预浸料: 重量含量为 60%的日本东丽公司生产纤维材料 T700纤维和重量 含量为 40%的 ACG公司生产的以 MTM82型酚醛树脂为主的基体树脂。 生产方法: 先通过可伸缩气囊 1的充放气口 11向可伸缩气囊 1进行一次充气,形成内部压力 为 0.4MPa 的具有第一状态的气囊, 形成具有第一状态的气囊, 在具有第一状态的气 囊的外表面上喷涂脱模剂, 将预浸料 2铺放在喷涂有脱模剂的具有第一状态的气囊外 表面上。在预浸料 2外表面上依次铺放依次铺设脱模布 4、带孔隔离膜 5、 以及透气毡 6形成第一过渡组件。 将第一过渡组件放入真空袋 3中密封, 并对真空袋 3抽真空至 内部压力为一 0.085MPa, 在抽真空后的真空袋 3与具有第一状态的气囊之间的相互作 用下对预浸料进行第一次压缩固定, 获取中间过渡组件。 将中间过渡组件放入圆筒状
模具内部, 并进一步向具有第一状态的气囊内部充气, 形成内部压力为 0.7MPa 的具 有第二状态的气囊; 在具有第二状态的气囊与圆筒状模具之间的相互作用下对预浸料 进行第二次压缩固定, 获取第二过渡组件, 将第二过渡组件放入烘箱中缓慢升温至 40°C保压处理 60分钟, 进行热缩处理, 进一步缓慢升温至 120°C进行固化, 保压处理 lh, 进一步升温至 180°C进行二次固化, 保压处理 2.h。 固化后冷却脱模, 获取臂架。 实施例 4 碳纤维预浸料: 重量含量为 50%的日本东丽公司生产纤维材料 T700纤维和重量 含量为 50%的以上海怡康化工材料有限公司生产的以 WH-2000型环氧树脂为主的基 体树脂。 生产方法: 先通过可伸缩气囊 1的充放气口 11向可伸缩气囊 1进行一次充气,形成内部压力 为 0.3MPa 的具有第一状态的气囊, 形成具有第一状态的气囊, 在具有第一状态的气 囊的外表面上喷涂脱模剂, 将碳纤维预浸料 2铺放在喷涂有脱模剂的具有第一状态的 气囊外表面上, 并将金属连接件预埋在碳纤维预浸料形成碳纤维臂架的相应位置上。 在碳纤维预浸料 2外表面上依次铺放依次铺设脱模布 4、 带孔隔离膜 5、 以及透气毡 6 形成第一过渡组件。 将第一过渡组件放入真空袋 3中密封, 并对真空袋 3抽真空至内 部压力为 - 0.08 MPa,在抽真空后的真空袋 3与具有第一状态的气囊之间的相互作用下 对碳纤维预浸料进行第一次压缩固定, 获取中间过渡组件。 将中间过渡组件放入圆筒 状模具内部, 并进一步向具有第一状态的气囊内部充气, 形成内部压力为 0.7 MPa的 具有第二状态的气囊; 在具有第二状态的气囊与圆筒状模具之间的相互作用下对碳纤 维预浸料进行第二次压缩固定, 获取第二过渡组件, 将第二过渡组件放入烘箱中缓慢 升温至 70°C保压处理 40分钟, 进行热缩处理, 进一步缓慢升温至 110 °C进行固化, 保压处理 1.5h, 进一步升温至 165°C进行二次固化, 保压处理 2.5h。 固化后冷却脱模, 在金属连接件和碳纤维预浸料固化物结合处涂抹北京伊诺瓦公司生产的 Adadite 2011 型胶黏剂获取碳纤维臂架。 对比例 1 碳纤维预浸料: 同实施例 1 生产方法: 采用中国专利申请第 201010524104.4号中方法制备, 方法如下:
将碳纤维预浸料铺放在芯模外表面上, 外部用真空膜包覆, 真空膜两端密封在芯 模的两端, 真空膜上设有抽气孔, 整个模具放入热压罐中, 利用压缩空气加压, 用电 加热管进行加热固化成型。 将由上述实施例 1-4和对比例 1所制备的碳纤维臂架的更方面性能进行测试, 测 试结果如表 1所示。 表 1
由表 1 中数据可知, 采用上述实施例 1-4所制备的碳纤维臂架与使用对比文件 1 所制备的碳纤维臂架的更方面性能差不多, 但明显的降低了生产成本, 而且在制备过 程中仅通过利用简单的设备, 包括可伸缩气囊、 箱型模具以及烘箱即可完成碳纤维臂 架的生产, 不使用热压罐, 降低了设备成本以及生产成本。 本发明所提供碳纤维复合材料臂架的生产方法不仅适用于碳纤维预浸料, 其也适 用于其他材料的预浸料, 例如玻璃纤维预浸料以及玄武岩纤维等, 这些都属于本发明 的保护范围。 以上仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本领域的技术人 员来说, 本发明可以有各种更改和变化。 凡在本发明的精神和原则之内, 所作的任何 修改、 等同替换、 改进等, 均应包含在本发明的保护范围之内。
Claims
权 利 要 求 书
1. 一种碳纤维复合材料臂架的生产方法, 其特征在于, 包括以下步骤:
51、 初步定型: 向可伸缩气囊中充气, 形成具有第一状态的气囊, 在所述 具有第一状态的气囊外表面铺放碳纤维预浸料, 获取第一过渡组件;
52、 压缩定型: 将所述第一过渡组件放入箱型模具内部, 并向具有第一状 态的气囊内部充气, 形成具有第二状态的气囊; 对所述碳纤维预浸料进行压缩 定型, 获取第二过渡组件;
53、 固化定型: 将所述第二过渡组件进行升温固化, 固化后冷却脱模获取 所述碳纤维臂架。
2. 根据权利要求 1所述的碳纤维复合材料臂架的生产方法, 其特征在于, 在所述 步骤 S2进一步包括如下步骤:
521、 一次压缩定型: 将所述第一过渡组件放入真空袋中密封, 并对所述 真空袋抽真空, 在抽真空后的真空袋中对所述碳纤维预浸料进行第一次压缩定 型, 获取中间过渡组件;
522、 二次压缩定型: 将所述中间过渡组件放入箱型模具内部, 并向气囊 内部充气, 形成具有第二状态的气囊; 对所述碳纤维预浸料进行第二次压缩定 型, 获取第二过渡组件。
3. 根据权利要求 2所述的碳纤维复合材料臂架的生产方法, 其特征在于, 所述步 骤 S1中所述具有第一状态的气囊中气体压力为 O. lMPa 0.3MPa; 所述步骤 S21中所述真空袋抽真空至一 0.1MPa 0.07MPa; 所述步骤 S22中具有第二 状态的气囊中气体压力为 0.6MPa 0.8MPa
4. 根据权利要求 1所述的碳纤维复合材料臂架的生产方法, 其特征在于, 在所述 步骤 S3 中升温固化处理之前还包括对所述第二过渡组件进行热缩的步骤, 所 述进行热缩的步骤为:
将所述第二过渡组件在 40°C 70°C下保温保压处理 30 60分钟。
5. 根据权利要求 4所述的碳纤维复合材料臂架的生产方法, 其特征在于, 所述步 骤 S3 中将所述第二过渡组件进行升温固化的步骤为: 将所述第二过渡组件在 100 °C 180 °C下保温处理 2-8小时。
6. 根据权利要求 5所述的碳纤维复合材料臂架的生产方法, 其特征在于, 所述步 骤 S3中将所述第二过渡组件进行升温固化的步骤为:
541、 一次固化: 将所述第二过渡组件缓慢升温至 100°C〜120°C, 保温处 理 1〜2小时;
542、 二次固化: 将完成一次固化后的所述第二过渡组件缓慢升温至 150°C〜180°C, 保温处理 2〜3小时;
7. 根据权利要求 1至 6中任一项所述的碳纤维复合材料臂架的生产方法, 其特征 在于, 所述步骤 S1中, 进一步包括:
511、 所述具有第一状态的气囊外表面喷涂脱模剂;
512、 将所述碳纤维预浸料铺放在喷涂有脱模剂的具有第一状态的气囊外 表面上。
8. 根据权利要求 7所述的碳纤维复合材料臂架的生产方法, 其特征在于, 所述步 骤 S1中, 进一步包括:
513、 在铺放在具有第一状态的气囊外表面的所述碳纤维预浸料的外表面 上依次铺设脱模布、 带孔隔离膜、 以及透气毡, 形成所述第一过渡组件。
9. 根据权利要求 1至 6中任一项所述的碳纤维复合材料臂架的生产方法, 其特征 在于, 所述步骤 S1 中在所述具有第一状态的气囊外表面铺放碳纤维预浸料的 过程中进一步包括, 将金属连接件预埋在所述碳纤维预浸料形成碳纤维臂架的 相应位置上。
10. 根据权利要求 9所述的碳纤维复合材料臂架的生产方法, 其特征在于, 所述步 骤 S3 中冷却脱模后在金属连接件和碳纤维预浸料固化物结合处涂抹胶黏剂, 干燥后获取所述碳纤维臂架。
11. 一种碳纤维复合材料臂架, 其特征在于, 所述碳纤维复合材料臂架由权利要求 1至 10中任一项所述的方法制备而成。
12. 一种混凝土泵车, 其中设有臂架, 其特征在于, 所述臂架为权利要求 11所述的 碳纤维复合材料臂架。
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CN102729488A (zh) * | 2012-07-05 | 2012-10-17 | 中联重科股份有限公司 | 碳纤维复合材料臂架、其生产方法及包括其的混凝土泵车 |
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