CN109353026B - Mould and method for manufacturing hat-shaped composite material reinforced wall plate - Google Patents
Mould and method for manufacturing hat-shaped composite material reinforced wall plate Download PDFInfo
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- CN109353026B CN109353026B CN201811112049.0A CN201811112049A CN109353026B CN 109353026 B CN109353026 B CN 109353026B CN 201811112049 A CN201811112049 A CN 201811112049A CN 109353026 B CN109353026 B CN 109353026B
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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
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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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/30—Mounting, exchanging or centering
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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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/30—Mounting, exchanging or centering
- B29C33/305—Mounting of moulds or mould support plates
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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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3828—Moulds made of at least two different materials having different thermal conductivities
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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
- B29C70/40—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
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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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
The invention discloses a die for manufacturing a cap-shaped composite material reinforced wall plate, belonging to the technical field of reinforced wall plate manufacturing, and the die for manufacturing the cap-shaped composite material reinforced wall plate comprises a template, a positioning support, a panel preformed body, a positioning support rod, and a cap-shaped reinforcing rib outer soft die, a reinforcing rib preformed body and a reinforcing rib inner soft die which are sequentially sleeved from inside to outside; the mold is convenient to assemble and disassemble because a whole set of complete forming mold is used for forming and combining the reinforcing ribs and the panel, the reinforcing rib preformed body and the panel preformed body can be well protected through the mold combining the flexible material and the metal material, and the manufacturing efficiency and the forming quality of the reinforcing rib wallboard are improved; the invention also discloses a method for manufacturing the capping composite material reinforced wall plate, which adopts a complete set of templates, a better forming process and a detailed processing method, and the manufactured finished product has the advantages of regular surface of the reinforcing rib, uniform thickness, stable and reliable product quality, convenient operation and convenient positioning.
Description
Technical Field
The invention relates to the technical field of manufacturing of reinforced wall plates, in particular to a die and a method for manufacturing a hat-shaped composite reinforced wall plate.
Background
The hat-shaped composite material reinforced wall plate structure is a composite material integrated structure with a high cost-efficiency ratio, and has the typical advantages of few connecting pieces, good rigidity and long fatigue life. The fuselage of the latest B787 and A350 wide-body passenger plane adopts a hat-shaped composite material reinforced structure. The hat-shaped composite material reinforced structure consists of hat-shaped reinforcing ribs and a panel, is simpler than T-shaped, J-shaped and I-shaped reinforced wall plates, and is generally formed by adopting co-curing (the panel and the reinforcing ribs are cured simultaneously) and co-bonding (the panel is cured firstly and then bonded and cured with the reinforcing ribs in a prepreg state) processes. In the manufacturing process, the defects of inaccurate position, local unevenness, uneven thickness, multiple folds at the inner side/outer side of the reinforcing rib and the like often occur, and the manufacturing efficiency is low.
Disclosure of Invention
The invention aims to provide a mould for manufacturing a hat-shaped composite material reinforced wall plate, which can be used for forming and combining a reinforcing rib and a panel through a complete set of forming mould, is convenient to disassemble and assemble and high in practicability, can well protect a reinforcing rib preformed body and a panel preformed body, and improves the manufacturing efficiency and the forming quality of the reinforced wall plate.
The invention aims to provide a method for manufacturing a hat-shaped composite material reinforced wall plate, which adopts a complete set of templates, a better forming process and a detailed processing method, and the manufactured finished product has the advantages of regular surface of the reinforcing rib, uniform thickness and stable and reliable product quality, and simultaneously has the effects of convenient operation and convenient positioning.
The invention is realized by the following technical scheme:
a mould for manufacturing a hat-shaped composite material ribbed wallboard comprises a template and a positioning support, wherein the positioning support is erected on the template, and the mould also comprises a panel preformed body, a positioning support rod, a hat-shaped reinforcing rib outer soft mould, a reinforcing rib preformed body and a reinforcing rib inner soft mould which are sequentially sleeved from outside to inside; one end of the positioning support rod is fixed at the top of the inner side of the positioning support, and the other end of the positioning support rod is connected with the top of the reinforcing rib outer soft mold; the panel preformed body is arranged on the template, a plurality of panel soft molds are arranged on the panel preformed body at equal intervals, the reinforcing rib outer soft mold, the reinforcing rib preformed body and the reinforcing rib inner soft mold are arranged on the adjacent panel soft molds, and the sum of the heights of the end parts of the reinforcing rib outer soft mold, the reinforcing rib preformed body and the reinforcing rib inner soft mold is less than or equal to the thickness of the panel soft mold; the reinforcing rib outer soft die comprises an end part soft die and a U-shaped reinforcing rib forming die, and the two ends of the reinforcing rib forming die are respectively connected with the end part soft die.
In order to better realize the invention, further, the panel soft mold is prepared by two layers of Airpad rubber sheets and one layer of reinforced prepreg; the reinforcing rib inner soft die is prepared from two layers of Airpad rubber sheets and one layer of reinforced prepreg.
In order to better realize the invention, the edges of two sides of the reinforcing rib forming die are inclined notches, and one end of the end soft die is in seamless connection with the notches of the reinforcing rib forming die; the end soft mold is prepared from two layers of Airpad rubber sheets and one layer of reinforced prepreg.
In order to better realize the invention, the invention further comprises a frame arranged below the template, wherein two sides of the frame are respectively and fixedly connected with the bottom of the template through inclined support rods, and the top of the frame is welded with the template; the frame is a screen-shaped framework.
In order to better realize the invention, the frame is made of metal materials, the thickness of a plate of the frame is 8-16 mm, and the thickness tolerance delta is less than or equal to 1.5 mm; the thickness of the template is 10-20 mm, and the thickness tolerance delta is less than or equal to 2.0 mm.
A method of manufacturing a hat-shaped composite stiffened wall panel, comprising the steps of:
step S101: preparing a panel preformed body, laying the panel preformed body on a template, and applying vacuum preloading at normal temperature and normal pressure by packaging vacuum bags for 5 layers each, wherein the vacuum degree is required to reach more than-0.090 MPa, and the preloading time is required to reach more than 15 min;
step S102: respectively preparing a reinforcing rib inner soft mold, a reinforcing rib preformed body, a reinforcing rib outer soft mold and a panel soft mold;
step S103: assembling and mounting; firstly, positioning the panel preformed body in the step S101 on a template, then placing a panel soft mold on the panel preformed body, and then placing a reinforcing rib inner soft mold on the panel soft mold; sleeving a reinforcing rib preform and a reinforcing rib outer soft mold on a reinforcing rib inner soft mold in sequence; installing the positioning support rod on the positioning support, and fixedly installing the positioning support on the template, so that the other end of the positioning support rod is connected with the outer soft mold of the reinforcing rib;
step S104: packaging a vacuum bag, then completing part curing in a hot-pressing tank, and finally demolding; and the demolding comprises the steps of removing the auxiliary material and the thermocouple sensor, then removing the positioning support and the positioning support rod, sequentially taking down the panel soft mold, taking out the reinforcing rib inner soft mold, and finally removing the reinforcing rib outer soft mold.
In order to better implement the invention, the method further comprises the following steps:
in the step S102, a first forming die is used for preparing a reinforcing rib inner soft die; preparing a reinforcing rib preformed body by using a reinforcing rib paving and stacking mold; preparing a reinforcing rib outer soft mold by using a second forming mold; preparing a panel soft mold by using a forming positioning block; the reinforcing rib paving and stacking die is of a male die structure, and the first forming die and the second forming die are of female die structures respectively.
In order to better realize the invention, the preparation method of the soft mold 12 with reinforced ribs in the step S102 is further that two layers of Airpad rubber sheets and one layer of reinforced prepreg are laid in the mold cavity of the first forming mold, the two layers of Airpad rubber sheets and the one layer of reinforced prepreg are packaged in a vacuum bag system, and then the two layers of Airpad rubber sheets and the one layer of reinforced prepreg are cured and vulcanized in an autoclave, wherein the process conditions are 175-185 ℃, 90-120 min and 0.40-0.75 MPa, and the whole process is kept in full vacuum; the preparation method of the external soft mold for the reinforcing rib comprises the steps of positioning and installing a reinforcing rib forming mold on a second forming mold, paving two layers of Airpad rubber sheets and one layer of reinforced prepreg on the edges of two ends of the reinforcing rib forming mold, then packaging a vacuum bag system, and curing and vulcanizing in an autoclave to form, wherein the process conditions are that the temperature is 175-185 ℃, the time is 90-120 min, the pressure is 0.40-0.75 MPa, and the full vacuum is kept in the whole process; the preparation method of the panel soft mold comprises the steps of fixedly installing forming positioning blocks on a template, paving two layers of Airpad rubber sheets and one layer of reinforced prepreg on the template between the adjacent forming positioning blocks, packaging a vacuum bag system, curing and vulcanizing in an autoclave, wherein the process conditions are that the temperature is 175-185 ℃, the time is 90-120 min, the pressure is 0.40-0.75 MPa, and the full vacuum is kept in the whole process.
In order to better implement the present invention, the method for encapsulating the vacuum bag in step S104 further includes applying putty strips to the sealing area, sequentially placing the isolation film a4000, laying the airfelt, laying the vacuum bag film, then pressing the vacuum bag film and the putty strips, kneading the vacuum bag film and the vacuum bag in the hat-shaped stiffener, and placing the vacuum connector.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) according to the die for manufacturing the hat-shaped composite material reinforced wall plate, the reinforcing ribs and the panel are molded and combined by the complete set of forming die, the die is convenient to assemble and disassemble and high in practicability, the reinforcing rib preformed body and the panel preformed body can be well protected by the die combined by the flexible material and the metal material, and the manufacturing efficiency and the forming quality of the reinforced wall plate are improved.
(2) The method for manufacturing the hat-shaped composite material reinforced wall plate adopts a complete set of templates, a better forming process and a detailed processing method, and the manufactured finished product has the advantages of regular surface of the reinforcing rib, uniform thickness and stable and reliable product quality, and has the effects of convenient operation and convenient positioning.
Drawings
Fig. 1 is an axial side view of a stiffened panel of the present invention;
fig. 2 is a cross-sectional view of a stiffened wall panel of the present invention;
FIG. 3 is a schematic view showing the installation of the mold in the early stage of manufacturing the ribbed wallboard of the present invention;
FIG. 4 is a schematic view of a first forming mold of the soft mold in the reinforcing bar of the present invention;
FIG. 5 is a schematic structural view of a reinforcing rib forming die of the reinforcing rib outer soft die of the present invention;
fig. 6 is a schematic structural view of a second forming die of the reinforcing bar outer soft die of the present invention;
FIG. 7 is a schematic view of the present invention after forming to make a soft mold for the end portion;
FIG. 8 is a schematic structural view of a reinforcing bar lay-up die of the present invention;
FIG. 9 is a schematic structural diagram of a panel after soft molding;
fig. 10 is a cross-sectional view of a cured combination of the hat stiffened wall panel of the present invention.
Wherein: 1-reinforcing rib preform; 2-panel pre-form; 3-a combined die; 4-template; 5-a frame; 6-positioning the bracket; 7-reinforcing rib forming die; 8, positioning a support rod; 9-forming a positioning block; 10-panel soft mold; 11-reinforcing rib laying and stacking die; 12-reinforcing rib inner soft mold; 13-end soft mold; 14-a first forming die; 15-a second forming die; 16-ribbed wall panels; 161-reinforcing ribs; 162-panel.
Detailed Description
Referring to fig. 10, the mold for manufacturing the hat-shaped composite material ribbed wallboard comprises a template 4 and a positioning support 6, wherein the positioning support 6 is erected on the template 4, and further comprises a panel preformed body 2, a positioning support rod 8, a hat-shaped reinforcing rib outer soft mold, a reinforcing rib preformed body 1 and a reinforcing rib inner soft mold 12, which are sequentially sleeved from outside to inside, which are arranged between the positioning support 6 and the template 4; one end of the positioning support rod 8 is fixed at the top of the inner side of the positioning bracket 6, and the other end of the positioning support rod is connected with the top of the reinforcing rib outer soft mold; the panel preformed body 2 is arranged on a template 4, a plurality of panel soft molds 10 are equidistantly arranged on the panel preformed body 2, the reinforcing rib outer soft mold, the reinforcing rib preformed body 1 and the reinforcing rib inner soft mold 12 are arranged on the adjacent panel soft molds 10, and the sum of the heights of the end parts of the reinforcing rib outer soft mold, the reinforcing rib preformed body 1 and the reinforcing rib inner soft mold 12 is less than or equal to the thickness of the panel soft mold 10; the reinforcing rib outer soft mold comprises an end part soft mold 13 and a U-shaped reinforcing rib forming mold 7, and the two ends of the reinforcing rib forming mold 7 are respectively connected with the end part soft mold 13.
As shown in fig. 3, the mold is used for manufacturing a reinforced wall plate 17, the positioning bracket 6 is of a gantry structure, the positioning bracket 6 and the template 4 are positioned and compressed through pins and screws, and the positioning support rod 8 connected to the top of the positioning bracket 6 is connected with a reinforced rib forming mold 16 to position the reinforced rib forming mold 16; the frame 5 is provided with a vent hole; the positioning standard of the end part forming die 13 is the same as that of the reinforcing rib forming die 16, and no margin is left on the periphery; the hat-shaped reinforcing rib forming die adopts a female die structure, the position of the hat-shaped reinforcing rib forming die is positioned by the positioning bracket 6, and the reinforcing rib forming die 16 and the positioning bracket 6 are in a connected and fixed state in the whole part conversion process.
The positioning bracket 6 is formed by welding square steel or angle steel and the like, and is positioned and fixed on the edge (non-sealing area) of the template 4 of the combined die 3 by pins and screws; the positioning bracket 6 is provided with a positioning hole for fixing the reinforcing rib forming die 16 by a supporting rod; the positioning support rod 8 is a solid metal bar to meet the air tightness requirement, one end of the positioning support rod is fixedly connected to the positioning support 6, the other end of the positioning support rod is fixedly connected to the reinforcing rib forming die 16, and the middle of the positioning support rod needs to be milled flat to facilitate screwing.
The panel soft mold 10 is of a block structure and determines the hollow position of the panel 2; the position block and the template 4 of the combined die 3 are fixedly bonded by a double-sided adhesive tape.
Further, as a preference of different embodiments, the panel soft mold 10 is prepared by two layers of Airpad rubber sheets and one layer of reinforced prepreg; the reinforcing rib inner soft mold 12 is prepared from two layers of Airpad rubber sheets and one layer of reinforced prepreg.
Further, as a preferred option of different embodiments, as shown in fig. 5 to 7, the two side edges of the rib forming die 7 are inclined notches, and one end of the end soft die 13 is seamlessly connected with the notch of the rib forming die; the end soft mold 13 is made of two layers of Airpad rubber sheets and one layer of reinforcing prepreg.
The reinforcing rib forming die 7 is of a clear edge structure without allowance, is used after being connected with the end soft die 13, and is not separated in the whole service life; the edge of the reinforcing rib forming die 7 is provided with an anti-slip groove, and the rubber naturally overflows into the groove when being vulcanized and can be firmly bonded with the reinforcing rib forming die 7 into a whole.
Further, as shown in fig. 3, as a preferred option of different embodiments, the system further includes a frame 5 disposed below the formwork 4, two sides of the frame 5 are respectively fixedly connected to the bottom of the formwork 4 through diagonal braces, and the top of the frame 5 is welded to the formwork 4; the frame 5 is a mesh-plate structure.
The structure that the frame 5 is combined with the template 4 is a combined die 3, all components of the frame 5 are connected in a tenon riveting or welding mode, the thickness of the partition plates on the periphery is 6 mm-10 mm, and the partition plates are uniformly provided with vent holes to improve the temperature uniformity and reduce the weight; the template 4 and the frame 5 are fixed by welding, and a positioning bracket 6 is arranged above the frame 5.
Further, as the optimization of different embodiments, the frame 5 is made of a metal material, the thickness of a plate of the frame 5 is 8-16 mm, and the thickness tolerance delta is less than or equal to 1.5 mm; the thickness of the template 4 is 10-20 mm, and the thickness tolerance delta is less than or equal to 2.0 mm.
A method of manufacturing a hat-shaped composite stiffened wall panel, comprising the steps of:
step S101: preparing a panel preforming body 2, paving the panel preforming body on a template 4, and applying vacuum prepressing to 5 layers of vacuum bags to be packaged at normal temperature and normal pressure when the 5 layers of vacuum bags are paved, wherein the vacuum degree is required to reach more than-0.090 MPa, and the prepressing time is required to reach more than 15 min;
step S102: respectively preparing a reinforcing rib inner soft mold 12, a reinforcing rib preformed body 1, a reinforcing rib outer soft mold and a panel soft mold 10;
step S103: assembling and mounting; firstly, positioning the panel pre-forming body 2 in the step S101 on a template 4, then placing a panel soft mold 10 on the panel pre-forming body 2, and then placing a reinforcing rib inner soft mold 12 on the panel soft mold 10; sleeving the reinforcing rib preform 1 and the reinforcing rib outer soft mold on the reinforcing rib inner soft mold 12 in sequence; installing a positioning support rod 8 on a positioning support 6, and fixedly installing the positioning support 6 on the template 4 to enable the other end of the positioning support rod 8 to be connected with the reinforcing rib outer soft mold;
step S104: packaging a vacuum bag, then completing part curing in a hot-pressing tank, and finally demolding; the demoulding comprises the steps of firstly removing the auxiliary materials and the thermocouple sensor, then removing the positioning support 6 and the positioning support rod 8, sequentially removing the panel soft mold 10, taking out the reinforcing rib inner soft mold 12 and finally removing the reinforcing rib outer soft mold.
After demolding, a finished stiffened wall panel 16 is obtained, as shown in fig. 1 and 2, with finished stiffeners 161 provided on the finished panel 161.
Further, as a preference of the different embodiments, as shown in fig. 4 to 8, the method further comprises the following steps:
in the step S102, the first molding die 14 is used to prepare the reinforcing bar inner soft die 12; preparing a reinforcing rib preform 1 by using a reinforcing rib paving and stacking die 11; preparing a reinforcing rib outer soft mold by using the second molding die 15; preparing a panel soft mold 10 by using the molding positioning block 9; the reinforcing rib paving and stacking mold 11 is in a male mold structure, and the first molding mold 14 and the second molding mold 15 are in a female mold structure respectively.
The forming positioning block 9 is a set of metal blocks matched with the profile of the panel soft mold 10, and aims to 'occupy' a proper position space when forming and manufacturing the panel soft mold, so that the formed panel soft mold 10 naturally forms a hollow structure, as shown in fig. 9.
Further, as a preferred option of different embodiments, the preparation method of the soft mold 12 in the reinforcement rib in step S102 is to lay and stick two layers of Airpad rubber sheets and a layer of reinforcing prepreg in the mold cavity of the first forming mold 14, encapsulate the sheets in a vacuum bag system, and then cure and vulcanize the sheets in an autoclave under the process conditions of 175-185 ℃, 90-120 min, 0.40-0.75 MPa, and maintain full vacuum in the whole process; the preparation method of the reinforcing rib external soft mold comprises the steps of positioning and installing a reinforcing rib forming mold 7 on a second forming mold 15, paving two layers of Airpad rubber sheets and one layer of reinforcing prepreg at the edges of two ends of the reinforcing rib forming mold 7, then packaging a vacuum bag system, and curing and vulcanizing in an autoclave for forming, wherein the process conditions are that the temperature is 175-185 ℃, the time is 90-120 min, the pressure is 0.40-0.75 MPa, and the full vacuum is kept in the whole process; the preparation method of the panel soft mold 10 comprises the steps of fixedly mounting forming positioning blocks 9 on a template 4, paving two layers of Airpad rubber sheets and one layer of reinforcing prepreg on the template 4 between the adjacent forming positioning blocks 9, packaging a vacuum bag system, curing and vulcanizing in an autoclave under the process conditions of 175-185 ℃, 90-120 min of time and 0.40-0.75 MPa of pressure, and keeping full vacuum in the whole process.
Further, as a preferred option of different embodiments, the method for encapsulating the vacuum bag in step S104 is to paste a putty strip on the sealing area, then sequentially place an isolation film a4000, lay an air-permeable felt, lay a vacuum bag film, then press the vacuum bag film and the putty strip, knead the vacuum bag film and the vacuum bag in the hat-shaped stiffener, and place a vacuum joint.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (9)
1. The mould for manufacturing the hat-shaped composite material reinforced wall plate is characterized by comprising a template (4), a positioning support (6), a panel preformed body (2) arranged between the positioning support (6) and the template (4), a positioning support rod (8), and a hat-shaped reinforcing rib outer soft mould, a reinforcing rib preformed body (1) and a reinforcing rib inner soft mould (12) which are sequentially sleeved from outside to inside, wherein the positioning support (6) is erected on the template (4); one end of the positioning support rod (8) is fixed at the top of the inner side of the positioning support (6), and the other end of the positioning support rod is connected with the top of the reinforcing rib outer soft mold; the panel preforming body (2) is arranged on the template (4), a plurality of panel soft molds (10) are equidistantly arranged on the panel preforming body (2), the reinforcing rib outer soft mold, the reinforcing rib preforming body (1) and the reinforcing rib inner soft mold (12) are arranged on the adjacent panel soft molds (10), and the sum of the heights of the end parts of the reinforcing rib outer soft mold, the reinforcing rib preforming body (1) and the reinforcing rib inner soft mold (12) is less than or equal to the thickness of the panel soft mold (10); the reinforcing rib outer soft die comprises an end part soft die (13) and a U-shaped reinforcing rib forming die (7), and the two ends of the reinforcing rib forming die (7) are respectively connected with the end part soft die (13).
2. The mould for making hat-shaped composite stiffened panels of claim 1, wherein the panel matrix (10) is made of two plies of Airpad rubber sheet and a layer of reinforcing prepreg; the reinforcing rib inner soft mold (12) is prepared from two layers of Airpad rubber sheets and one layer of reinforced prepreg.
3. The mold for manufacturing a hat-shaped composite reinforced wall panel according to claim 1, wherein both side edges of the reinforcing rib forming mold (7) are inclined notches, and one end of the end soft mold (13) is seamlessly connected with the notches of the reinforcing rib forming mold; the end soft mold (13) is prepared from two layers of Airpad rubber sheets and one layer of reinforced prepreg.
4. The mold for manufacturing the hat-shaped composite stiffened wall panel of any one of claims 1 to 3, further comprising a frame (5) arranged below the formwork (4), wherein two sides of the frame (5) are fixedly connected with the bottom of the formwork (4) through diagonal braces respectively, and the top of the frame (5) is welded with the formwork (4); the frame (5) is of a screen-shaped framework.
5. The mold for manufacturing the hat-shaped composite material reinforced wall plate according to claim 4, wherein the frame (5) is made of a metal material, the thickness of the plate of the frame (5) is 8-16 mm, and the thickness tolerance delta is less than or equal to 1.5 mm; the thickness of the template (4) is 10-20 mm, and the thickness tolerance delta is less than or equal to 2.0 mm.
6. A method of manufacturing a hat-shaped composite stiffened wall panel, comprising the steps of:
step S101: preparing a panel preforming body (2), paving the panel preforming body on a template (4), wherein 5 layers of vacuum bags are required to be packaged to apply vacuum prepressing at normal temperature and normal pressure when being paved, the vacuum degree is required to reach more than-0.090 MPa, and the prepressing time is required to reach more than 15 min;
step S102: respectively preparing a reinforcing rib inner soft mold (12), a reinforcing rib preformed body (1), a reinforcing rib outer soft mold and a panel soft mold (10);
step S103: assembling and mounting; firstly, positioning and placing the panel preformed body (2) in the step S101 on a template (4), then placing a panel soft mold (10) on the panel preformed body (2), and then placing a reinforcing rib inner soft mold (12) on the panel soft mold (10); sleeving the reinforcing rib preform (1) and the reinforcing rib outer soft mold on the reinforcing rib inner soft mold (12) in sequence; installing a positioning support rod (8) on a positioning support (6), and fixedly installing the positioning support (6) on the template (4) to enable the other end of the positioning support rod (8) to be connected with the reinforcing rib outer soft mold;
step S104: packaging a vacuum bag, then completing part curing in a hot-pressing tank, and finally demolding; and the demoulding comprises the steps of firstly removing the auxiliary material and the thermocouple sensor, then removing the positioning support (6) and the positioning support rod (8), sequentially taking down the panel soft mold (10), taking out the reinforcing rib inner soft mold (12), and finally removing the reinforcing rib outer soft mold.
7. The method of manufacturing a hat-shaped composite stiffened wall panel of claim 6, wherein the step S102 is to prepare an inner rib soft mold (12) using a first molding die (14); preparing a reinforcing rib preform (1) by using a reinforcing rib paving and stacking die (11); preparing a reinforcing rib outer soft mold by using a second molding die (15); preparing a panel soft mold (10) by using a molding positioning block (9); the reinforcing rib paving and stacking die (11) is of a male die structure, and the first forming die (14) and the second forming die (15) are of female die structures respectively.
8. The method for manufacturing the hat-shaped composite stiffened wall panel of claim 7, wherein the soft mold (12) for the reinforcement in the step S102 is prepared by laying two Airpad rubber sheets and a reinforcing prepreg in a mold cavity of a first forming mold (14), encapsulating the sheets in a vacuum bag system, and curing and vulcanizing the sheets in an autoclave under the conditions of 175-185 ℃ for 90-120 min and 0.40-0.75 MPa and full vacuum; the preparation method of the reinforcing rib outer soft mold comprises the steps of positioning and installing a reinforcing rib forming mold (7) on a second forming mold (15), paving two layers of Airpad rubber sheets and one layer of reinforcing prepreg at the edges of two ends of the reinforcing rib forming mold (7), then packaging a vacuum bag system, curing and vulcanizing in an autoclave, wherein the process conditions are that the temperature is 175-185 ℃, the time is 90-120 min, the pressure is 0.40-0.75 MPa, and the full vacuum is kept in the whole process; the preparation method of the panel soft mold (10) comprises the steps of fixedly mounting forming positioning blocks (9) on a template (4), paving two layers of Airpad rubber sheets and one layer of reinforcing prepreg on the template (4) between every two adjacent forming positioning blocks (9), packaging a vacuum bag system, curing and vulcanizing in an autoclave, wherein the process conditions are that the temperature is 175-185 ℃, the time is 90-120 min, the pressure is 0.40-0.75 MPa, and the whole process is kept in full vacuum.
9. The method for manufacturing a hat-shaped composite reinforced wall panel according to claim 6, wherein the step S104 of sealing the vacuum bag comprises the steps of attaching putty strips to the sealing area, sequentially placing the isolation film A4000, laying the airfelt, laying the vacuum bag film, pressing the vacuum bag film and the putty strips, kneading the vacuum bag film and the vacuum bag in the hat-shaped reinforcing ribs, and placing the vacuum connectors.
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