CN113386370B - Manufacturing method of continuous carbon fiber CF/PAEK thermoplastic composite material support hasp - Google Patents
Manufacturing method of continuous carbon fiber CF/PAEK thermoplastic composite material support hasp Download PDFInfo
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- CN113386370B CN113386370B CN202110659161.1A CN202110659161A CN113386370B CN 113386370 B CN113386370 B CN 113386370B CN 202110659161 A CN202110659161 A CN 202110659161A CN 113386370 B CN113386370 B CN 113386370B
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- 229920006260 polyaryletherketone Polymers 0.000 title claims abstract description 64
- 229920001169 thermoplastic Polymers 0.000 title claims abstract description 63
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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
- B29C70/345—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 matched moulds
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/22—Hinges, pivots
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a method for manufacturing a continuous carbon fiber CF/PAEK thermoplastic composite material supporting hasp, which comprises a die, wherein the die comprises an upper cavity plate and a lower cavity plate for forming an internal cavity, a bottom plate and a die frame plate for forming an outer frame of the die, and a pressing block for contacting with a press and pressing the upper cavity plate; the upper cavity plate is a solid plate-shaped structure which is formed by mutually splicing wedge blocks and side plates at two sides of the wedge blocks and has a T-shaped integral longitudinal section; the side plates at two sides are positioned at the left part and the right part of the T shape, and the wedge block is positioned at the middle part of the T shape; the application of the mould is as follows: and (2) taking continuous carbon fiber CF as a reinforcing phase and PAEK as a matrix phase, placing the prepreg in an internal cavity, and adopting a high-temperature high-pressure process to form in one step to obtain the continuous CF/PAEK thermoplastic composite material and the support hasp bent at 90 degrees. The invention realizes the transformation of the composite material product from a common flat plate part to a special-shaped product by means of the combined die and the special-shaped structure of the upper cavity plate and the lower cavity plate, and the composite material product is integrally formed in one step.
Description
Technical Field
The invention belongs to the technical field of composite materials, is applied to the fields of aerospace, military industry and medical treatment, is applied to key parts with fatigue resistance and abrasion resistance, and relates to a method for manufacturing a continuous carbon fiber CF/PAEK thermoplastic composite material support hasp, which comprises a mold and a corresponding forming method thereof.
Background
By continuous CF/PAEK thermoplastic composite is meant a thermoplastic composite in which carbon fibers reinforce the PAEK resin matrix in the form of continuous fibers (long fibers) or a fabric. The resin matrix endows the resin with excellent mechanical property, thermal property, chemical resistance and easy forming and processing property; CF primarily determines the mechanical properties of the composite. Through reasonable design optimization, the defect of the performance of a pure PAEK material is made up, and the PAEK material can be applied to the fields of aviation and aviation astronautics military aircraft, wear-resistant anti-fatigue parts in special industries, medical instruments, implantable bone tissue structures and the like.
The support buckle is also called as a support buckle, a corner sheet or a link corner sheet, is a typical application of a continuous CF/PAEK thermoplastic composite material in an aviation aircraft, is used for a lap joint part of a truss or a stringer, and requires that the material has good impact resistance, fatigue resistance, abrasion resistance and high and low temperature resistance, and in addition, in the process of generating heat by friction, the material is required to have certain heat conductivity so as to transmit the heat out as soon as possible. Typically, a large aircraft requires thousands of support clasps thereon.
The continuous CF/PAEK thermoplastic composite material forming process can use hot pressing tank forming after laying, silk laying in-situ consolidation forming, winding in-situ consolidation forming, high-temperature hot pressing forming or press forming of blank plates. Aiming at the forming equipment of continuous CF/PAEK thermoplastic composite materials, domestic research is still in the development and verification stage, except individual military units, enterprises and units with the continuous CF/PAEK thermoplastic composite material batch production capacity are few, and special-shaped components are few and few. Aiming at the special-shaped component product, on one hand, the blank plate can be used for machining, so that the machining time is consumed, the material is wasted, in the machining process, the continuous fiber needs to be cut, and the reinforcing effect of the continuous fiber is greatly reduced; on the other hand, make composite panel earlier, can bend the punching press form through certain heating methods and realize again, the punching press needs special equipment, needs to realize high temperature, high pressure, pressurize function, and finished product panel carries out secondary treatment, and fibre and resin relate to rearrangement under the high temperature, otherwise local rich glue, local glue not enough, local fibre fracture, fibre fold scheduling problem appear very easily. In view of this, the bending angle of the composite material product with the special-shaped structure as a non-flat plate common section bar is limited to a certain extent, the bending angle must be larger than 90 degrees, the bending angle is more or less, the bending angle generally exists in an obtuse angle mode, and the bending is easier when the relative angle is larger.
In the prior art, a method for preparing a thermoplastic composite material aircraft wing rib is disclosed, which comprises the steps of firstly molding a CFF material and a PPS material into a plate, then heating to a certain temperature, placing the plate in an aircraft wing rib mold, and punching to form a product, wherein two procedures are required for molding, two steps of heating and cooling procedures are required, and the like, and the time is relatively consumed.
Therefore, it is very important to develop a method for realizing the one-step molding of the integrated support hasp with 90-degree bending.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method for manufacturing a continuous carbon fiber CF/PAEK thermoplastic composite material support hasp; the method comprises the following steps: on one hand, the cavity die is embedded in the frame-shaped die, and the two dies are used simultaneously, so that the defects of mold pressing flash and limited bearing pressure existing in the case of using the cavity die independently are avoided; on the other hand, the material can be selected according to the prepreg, the fiber sheet and the resin powder, the fiber and the resin sheet, the fiber fabric and the resin powder or the resin sheet material, the fiber and the resin filament fabric, and the like, and the material is selected in various ways and is not limited to the use in one material form.
In order to achieve the purpose, the invention adopts the following scheme:
a method for manufacturing a continuous carbon fiber CF/PAEK thermoplastic composite material supporting hasp is characterized in that a prepreg which takes continuous carbon fiber CF as a reinforcing phase and PAEK as a matrix phase is taken as a raw material, and the prepreg is placed in an internal cavity of an assembled die for molding; the assembled die comprises an upper cavity plate and a lower cavity plate (supporting hasps are mutually extruded and formed by the upper cavity plate and the lower cavity plate which are in a concave-convex matching structure) for forming an internal cavity, and a pressing block for contacting with a press and pressing the upper cavity plate; a mold frame plate for accommodating the lower cavity plate, the upper cavity plate and the pressing block, and a bottom plate for supporting the lower cavity plate; (the bottom plate and the frame plate of the die frame are fixed through screw hole countersunk head bolts);
the upper cavity plate is of a solid plate-shaped structure which is formed by mutually splicing wedge blocks and side plates at two sides of the wedge blocks and has a T-shaped integral longitudinal section, and the upper cavity plate and the lower cavity plate are of concave-convex matching structures and have T-shaped longitudinal sections, so that the support hasp with the bend can be manufactured by adopting the die, and the maximum bending angle can reach 90 degrees; the side plates at two sides are positioned at the left part and the right part of the T shape, and the wedge block is positioned at the middle part of the T shape; the longitudinal section of the wedge-shaped block is an isosceles triangle or an isosceles trapezoid (preferable), the isosceles triangle is formed by extending a certain length of extension line from the bottom edge of the isosceles triangle to the outside of two sides, the extension line is collinear with the bottom edge, the isosceles trapezoid is formed by extending a certain length of extension line from the bottom edge of the isosceles triangle and the outside of two sides (namely the bottom edge with longer length), the extension line is collinear with the bottom edge, the bottom edge of the isosceles triangle or the bottom edge of the isosceles trapezoid forms the middle part of a cross of the T-shape, and the surface (plane) where one cross of the T-shape is located is the surface of the upper cavity plate contacted with the pressing block; the wedge-shaped structure is beneficial to force transmission, the bottom of the supporting piece is stressed under the condition of being pressed, the wing edges on two sides are also stressed, all parts of the product are uniformly stressed, the gum dipping amount is uniform, and the performance of the finished piece is uniform;
the upper cavity plate is formed by mutually splicing wedge blocks and side plates at two sides of the wedge blocks, the press is considered that an oil cylinder is stressed in the vertical moving direction, pressure is distributed on an upper plane part and a lower plane part, the left direction and the right direction of a side part are not stressed, a composite material product belongs to a laminated finished product, and under the condition that the side surface is not stressed, the interlayer bonding strength of the side part is necessarily low, and the side part is easy to delaminate. A wedge-shaped combined die structure is used in view of increasing the side force component. The material is heated and softened along with the rise of the temperature of the die, the middle wedge-shaped component slowly moves downwards under constant temperature rise pressure, in the process of moving downwards, component force is applied to the two sides of the die, the upper bottom of the wedge-shaped component gradually contacts the plane of a product, and the cavity part of the concave part gradually bears the pressure. The whole press is stressed in the pressure direction and the side left and right directions simultaneously by the movement of the wedge-shaped structure, and the product is molded.
The dies have certain thickness requirements, so that under high pressure, the fittings of the dies are not easy to extrude and fly out, and accidents are caused, the thickness of the frame plate of the die frame is set to be between 50mm and 100mm, and the thickness of the upper cavity plate and the lower cavity plate is set to be between 15mm and 50 mm;
the pressing block belongs to a part of the die in the invention, is positioned on the upper cavity plate, is partially positioned in the die outer frame, and is partially positioned in the upper area of the die outer frame, the structure is relatively simple, the matching clearance between the pressing block and the die frame plate is controlled between 0.2mm and 2mm according to the determination of the die outer frame, the function is mainly to meet the transmission of force, and the force can be transmitted to the upper pressing plate from the lower pressing plate when the pressing machine presses the pressure.
As a preferred technical scheme:
according to the manufacturing method of the continuous carbon fiber CF/PAEK thermoplastic composite material support hasp, the base angle of an isosceles triangle is 40-85 degrees, and the corresponding internal angle of the lower base (namely the longer base) of the isosceles trapezoid is 40-85 degrees;
the sum of extension lines formed by extending the bottom edge of the isosceles triangle or the lower base of the isosceles trapezoid to the outside of two sides by a certain length accounts for 20-60% of the side length of the bottom edge of the isosceles triangle or the lower base of the isosceles trapezoid (the aim is to make the pressure more uniform);
the length of the bottom side of the isosceles triangle or the lower bottom of the isosceles trapezoid is 20% -70% of the length of the first transverse T-shaped bar, and the width of the pressing block is 150% -300% of the length of the bottom side of the isosceles triangle or the lower bottom of the isosceles trapezoid;
the length of the upper bottom of the isosceles trapezoid is 25% -60% of the width of the T-shaped vertical.
These parameters are set so as to ensure a uniform transmission of the force in case of local stresses, the fibres being locally damaged, affecting the strength of the product.
According to the manufacturing method of the continuous carbon fiber CF/PAEK thermoplastic composite material support hasp, two mutually perpendicular grooves are arranged on one side of the bottom plate back to the lower cavity plate, and the intersection point of the two grooves is positioned on the vertical central shaft in the outer frame of the die; the intersection point of the two grooves is provided with a circular groove, and circular metal is embedded in the circular groove. The middle of the plate belongs to a heat enrichment area, and besides the middle of the plate is heated, the heat heated at the edge can also be enriched to the middle part, so that the groove is formed in the middle part. The main body is set for two reasons, on one hand, the heat dissipation and cooling are considered, after the groove is formed, the area of the central part contacting the pressure plate is reduced, the relative heat enrichment degree is reduced, the product cooling speed is accelerated, and the integral one-step forming is facilitated; on the other hand, the deformation of the bottom plate is reduced, the metal characteristic is thermal expansion and cold contraction, the heat is concentrated in the middle, the central part is expanded severely without slotting, the peripheral temperature is low, the expansion degree is weakened relatively, the central part has the largest pressure and is deformed seriously under the condition of high-temperature compression of the central part, another metal is slotted or embedded into the slotting or embedded into the middle part, a fit clearance exists, and the deformation is weakened to prolong the service period of the bottom plate under the condition of a certain degree.
In the method for manufacturing the continuous carbon fiber CF/PAEK thermoplastic composite material support hasp, the slotting directions of the two grooves are mutually vertical, and one slotting direction is parallel to any one side length on the orthographic projection surface of the base plate (when the orthographic projection surface of the base plate is rectangular, the slotting directions of the two grooves are respectively parallel to the mutually vertical sides on the orthographic projection surface of the base plate), so that the heat of the central part is prevented from being enriched.
According to the manufacturing method of the continuous carbon fiber CF/PAEK thermoplastic composite material supporting hasp, the diameter of the circular groove is 10-100 mm, a certain combination area is ensured, the effect of eliminating heat enrichment is not obvious when the size of the through hole is smaller, and the uniformity of pressure application can be influenced when the size of the through hole is larger.
According to the manufacturing method of the continuous carbon fiber CF/PAEK thermoplastic composite material support hasp, the grooving form varies according to the size of a die, the product state, the grooving form can be common strip-shaped, trapezoid and the like, the groove width is also different, the width of each groove is 10-100 mm, the height of each groove is 5-20 mm (namely the distance between the plane where the opening of each groove is located and the plane where the bottom of each groove is located), and the heat accumulated at the bottom of the die can be timely dissipated in a cooling state, so that the crystallinity of each part of PAEK is uniform as much as possible.
According to the manufacturing method of the continuous carbon fiber CF/PAEK thermoplastic composite material support hasp, after installation, the distance between the lower cavity plate, the upper cavity plate, the pressing block and the inner side wall of the frame plate of the mold frame is 0.02-1 mm. And a certain distance is ensured, so that the internal cavity plate is ensured to be conveniently arranged in the die frame, a certain gap is ensured, and the surplus glue and fiber can have a storage space under pressure.
The manufacturing method of the continuous carbon fiber CF/PAEK thermoplastic composite material support hasp comprises the following steps:
(1) manufacturing a product prefabricated blank: sequentially placing prepreg in a lower cavity plate by taking continuous carbon fiber CF as a reinforcing phase and PAEK as a matrix phase to finish primary laying, dividing the upper cavity plate into designated positions in blocks, removing redundant laying blanks, and profiling for a period of time to obtain a product prefabricated blank;
(2) assembling a mold: assembling the bottom plate and the die frame plate into a die outer frame; then fixing the lower cavity plate on the bottom plate; then putting the product into a prefabricated blank; then sliding the upper cavity plate in blocks to place the product precast blank in an internal cavity (the left and right side plates slide to corresponding positions slowly along the boundary of the lower cavity, and then sliding the wedge block to corresponding positions slowly from one end), then placing the outer frame of the mold in the central part (the central part of the lower pressure plate is a metal flat plate which is in a known structure, the lower base of the press is in direct contact with the mold and takes the surface center of the lower pressure plate of the press as the center, and the outer frame of the mold as the peripheral outline, and an area where the two are overlapped) of the press lower pressure plate, and placing a pressing block;
(3) one-step forming: adopting a high-temperature high-pressure process to prepare a continuous CF/PAEK thermoplastic composite material supporting buckle in one step;
the high-temperature high-pressure process means that the temperature is 350-410 ℃, and the unit pressure (or pressure) of pressurization is 4-15 MPa;
the continuous CF/PAEK thermoplastic composite material supporting buckle is a 90-degree bent supporting buckle.
The preparation method is characterized in that the preparation method is used for preparing the continuous carbon fiber CF/PAEK thermoplastic composite material support hasp specifically as follows:
preparing materials: and (3) unfolding the raw materials from a light-resistant sealed and dried packaging bag, cutting the raw materials according to the allowance of 20% of the size magnification of the supporting hasp, placing the cut sheet layer materials in a clean space, and sealing for later use. Wherein, the continuous carbon fiber CF is used as a reinforcing phase, and the PAEK is used as a matrix phase. The continuous carbon fiber CF may be present in a unidirectional fiber spread form, or in a woven form, such as one of plain, twill, satin, or unbuckled fabric; the matrix phase refers to a resin matrix containing ether bonds, ketone bonds and other groups on a main chain of a macromolecular benzene ring, and comprises polyether ether ketone PEEK, polyether ketone PEK, polyether ketone PEKK, polyether ether ketone PEEKK and other polyaryletherketone PEAK polymers. The prepreg can be one or more of fiber and resin prepreg semi-finished products, fiber fabric and resin powder combination, or fiber fabric and resin sheet layer combination, wherein the resin volume content is between 30% and 70%, and the mass content is between 30% and 60%;
before the manufacturing of the product preform, the supporting fastener is further treated by using soft tools at all parts of a mold, surface glue residues, stains or rusty spots and the like are removed, the supporting fastener is polished by using 2000-mesh sand paper, and a layer of anti-sticking liquid reagent and a layer of paste glue film are sprayed. The internal roughness grade of the frame plate of the die frame is required to be less than RA 1.6; the surface of the internal cavity in contact with the prepreg requires one or more of finish polishing, mirror finishing or chrome plating, and nitriding. Prevent the PEEK material from sticking metal and damaging the die in a high-temperature molten state. The anti-sticking material comprises one or more of high-temperature anti-sticking liquid, solid, paste or powder.
The manufacturing method of the continuous carbon fiber CF/PAEK thermoplastic composite material support hasp adopts a high-temperature and high-pressure process for one-step molding, and comprises the following steps: firstly, cold pressing is carried out under the pressure of not more than 4MPa, then the temperature is raised under pressure, after the temperature is raised to the required temperature, the temperature is preserved, the pressure is gradually increased to the set pressure, the temperature is preserved and maintained for 10min to 150min, and then the temperature is reduced to below 200 ℃ for demoulding, thus obtaining the support hasp. Cold pressing is a conventional operation for powder pressed products, and the main function of cold pressing is to exhaust air and allow each layer of material to contact, thereby facilitating heat conduction. The common material is not necessary, the cold pressing pressure set by the composite material product cannot be large, the special type is to make a supporting hasp, otherwise, the cold pressing cuts off the carbon fiber, and the forming cannot be carried out.
The principle of the invention is as follows:
based on a compression molding technology, the composite material containing thermoplastic resin as a matrix melts the thermoplastic resin at a certain temperature, and is pressurized and exhausted at the melting temperature to finally form a compact composite material product, wherein the porosity is lower than 0.2%;
the invention realizes the transformation of the composite material product from a common flat plate part to a special-shaped product by means of the combined die and the special-shaped structure of the upper cavity plate and the lower cavity plate;
according to the invention, by means of the combined structure of the upper cavity plate and the wedge-shaped structure in the middle, under high temperature and high pressure, the supporting hasp is ensured to bear force on the upper plane part and the lower plane part, and the lateral parts of the two sides are also subjected to component force in the left-right direction, so that the two lateral parts are synchronously stressed, and the stable quality of the two lateral parts is ensured (namely, the supporting hasp product prepared by the invention is subjected to profile observation after being cut, the profile conditions of the lateral parts and the upper surface and the lower surface are subjected to consistency comparison, and the quality of the two lateral parts of the supporting hasp is obtained by carrying out nondestructive detection on internal defects);
according to the invention, by means of the wedge-shaped structure and the specific structural design thereof, the condition that the performance is reduced due to glue enrichment or fiber fracture under high pressure at the 90-degree bent edge part of the product is avoided, and finally, a one-step molded product is realized;
the invention finally realizes the one-step molding manufacture of the support hasp by means of a specific mould design and a specific process method.
Advantageous effects
The invention discloses a preparation method of a continuous carbon fiber CF/PAEK thermoplastic composite material support hasp, which adopts continuous carbon fiber CF as a reinforcing phase, PAEK as a matrix phase and adopts a high-temperature and high-pressure processAnd (5) molding. The forming process is simple to implement, the material forming period is short, and the method is suitable for manufacturing products in small batches. The finally prepared composite material has the advantages of outstanding finished product performance, strong bonding force between fibers and a matrix, low porosity, good interlaminar toughness, high heat resistance temperature and good fatigue resistance, the tensile strength is 680-800 MPa (the test method is ASTM D3039), the bending strength is 860-920 MPa (the test method is ASTM D7264), the heat deformation temperature is 325-335 ℃ (the test method is ASTM D648), the interlaminar shear strength is 78-85 MPa (the test method is ASTM D3518), and the interlaminar fracture toughness of the I-type layer is 1380-1410 MPa/m1/2(test method is ASTM D5528), and the compression strength after impact is 225-237 MPa (test method is ASTM D7317). The finally prepared composite material can replace metal alloy materials and traditional thermosetting composite materials, is used in the fields of aerospace, war industry and medical treatment, and is applied to key parts with fatigue resistance and abrasion resistance.
The invention considers the specific structure of the product, the designed die comprises an upper die cavity plate and a lower die cavity plate which are used for forming an internal die cavity, the upper die cavity plate is a three-part combined die, the middle part of the upper die cavity plate is of a structure similar to an isosceles triangle or a similar isosceles trapezoid, and the left side and the right side of the press are ensured to have component force except that an oil cylinder moves up and down to bear force in a single direction. The left side and the right side of the product are synchronously stressed except the upper plane and the lower plane, the stress of the product is uniform, and the quality is stable.
Drawings
FIG. 1 is a schematic view showing the fitting relationship between a mold for a continuous carbon fiber CF/PAEK thermoplastic composite support buckle and the support buckle according to example 1;
FIG. 2 is an exploded view of the mold for the continuous carbon fiber CF/PAEK thermoplastic composite support buckle and the support buckle according to example 1;
FIG. 3 is a schematic view showing the fitting relationship between the mold and the support buckle when the frame plate of example 1 is not included;
FIG. 4 is a view showing the assembled relationship of the lower cavity plate and the support buckle of embodiment 1;
FIG. 5 is a view showing the fitting relationship between the side plate and the support buckle according to embodiment 1;
FIG. 6 is a bottom view of the base plate of embodiment 1;
FIG. 7 is a left side view of the bottom plate of embodiment 1;
FIG. 8 is a bottom view of the lower cavity plate of example 1;
FIG. 9 is a left side view of the lower cavity plate of embodiment 1;
FIG. 10 is a top plan view of the combination of two side plates and wedge blocks of example 1;
FIG. 11 is a left side view of the combination of two side plates and wedge blocks of example 1;
FIG. 12 is a plan view of the support buckle of embodiment 1;
FIG. 13 is a front view of the support buckle of embodiment 1;
FIG. 14 is a schematic structural view of a support buckle according to embodiment 1;
FIG. 15 is a plan view of a frame plate of the mold frame of example 1;
FIG. 16 is a front view of a frame plate of the mold frame of embodiment 1;
wherein, 1-pressing block, 2-mould frame plate, 3-side plate, 4-wedge block, 5-supporting hasp, 6-lower cavity plate, and 7-bottom plate.
Detailed Description
The invention will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
A mould for continuous carbon fiber CF/PAEK thermoplastic composite material supporting hasps is an assembled mould; the die comprises an upper die cavity plate and a lower die cavity plate 6 which are used for forming an internal die cavity and have a concave-convex matching structure, and a pressing block 1 which is used for contacting with a press and pressing the upper die cavity plate; a mold frame plate 2 for accommodating the lower cavity plate 6, the upper cavity plate and the pressure block 1, and a bottom plate 7 for supporting the lower cavity plate 6;
the upper cavity plate is a solid plate-shaped structure which is formed by mutually splicing wedge blocks 4 and side plates 3 at two sides of the wedge blocks and has a T-shaped integral longitudinal section; the side plates 3 at two sides are positioned at the left part and the right part of the T shape, and the wedge block 4 is positioned at the middle part of the T shape; the longitudinal section of the wedge block 4 is an isosceles triangle or an isosceles trapezoid, the isosceles triangle is formed by extending a certain length of the bottom edge of the isosceles triangle and the extension line formed by extending a certain length of the bottom edge of the isosceles triangle to the outer parts of the two sides, the extension line is collinear with the bottom edge, the isosceles trapezoid is formed by extending a certain length of the bottom edge of the isosceles triangle and the extension line formed by extending a certain length of the bottom edge of the isosceles trapezoid to the outer parts of the two sides, the extension line is collinear with the bottom edge, the bottom edge of the isosceles triangle or the bottom edge of the isosceles trapezoid forms the middle part of a cross of the T-shaped, and the surface where the cross of the T-shaped is the surface where the upper cavity plate is contacted with the pressing block 1.
The mould for the continuous carbon fiber CF/PAEK thermoplastic composite material supporting hasp has the advantages that the base angle of an isosceles triangle is 40-85 degrees, and the corresponding inner angle of the lower bottom of the isosceles trapezoid is 40-85 degrees;
the sum of extension lines formed by extending the bottom edge of the isosceles triangle or the lower bottom of the isosceles trapezoid to the outside of two sides by a certain length accounts for 20% -60% of the side length of the bottom edge of the isosceles triangle or the lower bottom of the isosceles trapezoid;
the length of the bottom side of the isosceles triangle or the lower bottom of the isosceles trapezoid is 20% -70% of the length of the first transverse T-shaped bar, and the width of the pressing block 1 is 150% -300% of the length of the bottom side of the isosceles triangle or the lower bottom of the isosceles trapezoid;
the length of the upper bottom of the isosceles trapezoid is 25% -60% of the width of the T-shaped vertical.
According to the mould for the continuous carbon fiber CF/PAEK thermoplastic composite material supporting hasp, two mutually perpendicular grooves are formed in one side, back to the lower cavity plate 6, of the bottom plate 7, and the intersection point of the two grooves is located on the vertical central shaft of the outer frame of the mould; the intersection point of the two grooves is provided with a circular groove, and circular metal is embedded in the circular groove.
In the mold for the continuous carbon fiber CF/PAEK thermoplastic composite material support hasp, the slotting directions of the two grooves are perpendicular to each other, and one slotting direction is parallel to any one side length on the orthographic projection surface of the bottom plate 7.
The mould for the continuous carbon fiber CF/PAEK thermoplastic composite material support hasp has the advantages that the diameter of the circular groove is 10-100 mm.
According to the mould for the continuous carbon fiber CF/PAEK thermoplastic composite material support hasp, the width and the height of each groove are 10-100 mm and 5-20 mm respectively.
After the mold for the continuous carbon fiber CF/PAEK thermoplastic composite material supporting hasp is installed, the distance between the lower cavity plate 6, the upper cavity plate and the pressing block 1 and the inner side wall of the mold frame plate 2 is 0.02-1 mm.
The method for manufacturing the supporting buckle by using the mold for the continuous carbon fiber CF/PAEK thermoplastic composite material supporting buckle comprises the following steps:
(1) manufacturing a product prefabricated blank: sequentially placing prepreg in a lower cavity plate by taking continuous carbon fiber CF as a reinforcing phase and PAEK as a matrix phase to finish primary laying, dividing the upper cavity plate into designated positions in blocks, removing redundant laying blanks, and profiling for a period of time to obtain a product prefabricated blank;
(2) assembling a mold: assembling the bottom plate and the die frame plate into a die outer frame; then fixing the lower cavity plate on the bottom plate; then putting the product into a prefabricated blank; then sliding the upper cavity plate in blocks to place the product precast blank in an internal cavity (the left and right side plates slide to corresponding positions slowly along the boundary of the lower cavity, and then sliding the wedge block to corresponding positions slowly from one end), then placing the outer frame of the mold in the central part (the central part of the lower pressure plate is a metal flat plate which is in a known structure, the lower base of the press is in direct contact with the mold and takes the surface center of the lower pressure plate of the press as the center, and the outer frame of the mold as the peripheral outline, and an area where the two are overlapped) of the press lower pressure plate, and placing a pressing block;
(3) one-step forming: adopting a high-temperature high-pressure process to prepare a continuous CF/PAEK thermoplastic composite material supporting buckle in one step;
the high-temperature high-pressure process means that the temperature is 350-410 ℃, and the unit pressure of pressurization is 4-15 MPa;
the continuous CF/PAEK thermoplastic composite material supporting buckle is a 90-degree bent supporting buckle.
In the method, before the product preform is manufactured, all parts of the mold for the supporting buckle are polished, and a layer of mold-sticking-preventing liquid reagent and a paste-like adhesive film are sprayed.
The method adopts a high-temperature and high-pressure process to form in one step, and comprises the following steps: setting a program to heat up, gradually pressurizing to a set pressure after the temperature is raised to a required temperature, maintaining the pressure for 10-150 min, cooling to below 200 ℃, and demolding to obtain the support hasp.
Example 1
A mould for a continuous carbon fiber CF/PAEK thermoplastic composite material support hasp is an assembled mould, and the support hasp is a support hasp bent at an angle of 90 degrees; as shown in fig. 1 to 16, the press comprises an upper cavity plate and a lower cavity plate 6 which are used for forming an internal cavity and have a concave-convex matching structure, and a pressing block 1 which is used for contacting with a press and pressing the upper cavity plate; a mold frame plate 2 for accommodating the lower cavity plate 6, the upper cavity plate and the pressure block 1, and a bottom plate 7 for supporting the lower cavity plate 6;
the lower cavity plate 6, the upper cavity plate and the pressing block 1 are sequentially positioned in the outer frame of the die, and the distance between the lower cavity plate 6, the upper cavity plate and the pressing block 1 and the inner side wall of the frame plate 2 of the die frame is 0.02-1 mm; a support buckle 5 made of a mold is positioned between the lower cavity plate 6 and the upper cavity plate;
the upper cavity plate is a solid plate-shaped structure which is formed by mutually splicing wedge blocks 4 and side plates 3 at two sides of the wedge blocks and has a T-shaped integral longitudinal section; the side plates 3 on the two sides are positioned on the left part and the right part of the T shape;
the wedge block 4 is positioned at the right middle part of the T shape; the longitudinal section of the wedge-shaped block 4 is similar to an isosceles trapezoid; the isosceles trapezoid is formed by an isosceles trapezoid with an internal angle of 65 degrees corresponding to the lower base and an extension line formed by extending the lower base (namely the base with longer length) of the isosceles trapezoid to the outside of two sides for a certain length, the extension line and the base are collinear, the lower base of the isosceles trapezoid forms the middle part of a cross of a T shape, and the surface (plane) where the cross of the T shape is located is the surface of the upper cavity plate contacted with the pressing block 1);
the length of the sum of extension lines formed by extending the lower bottom of the isosceles trapezoid to the outside of two sides by a certain length accounts for 20% of the side length of the lower bottom of the isosceles trapezoid; the length of the lower bottom of the isosceles trapezoid is 50% of that of the T-shaped cross, and the width of the pressing block 1 is 200% of that of the lower bottom of the isosceles trapezoid; the length of the upper bottom of the isosceles trapezoid is 35% of the width of the T-shaped vertical part;
two mutually perpendicular grooves are arranged on one side of the bottom plate 7 back to the lower cavity plate 6, the orthographic projection surface of the bottom plate 7 is rectangular, the slotting directions of the two grooves are respectively parallel to mutually perpendicular edges on the orthographic projection surface of the bottom plate 7, the widths of the two grooves are 10-100 mm, the depths of the two grooves are 5-20 mm, and the intersection point of the two grooves is positioned on a vertical central shaft in the outer frame of the mold; the intersection point of the two grooves is provided with a circular groove with the diameter of 10 mm-100 mm, and circular metal is embedded in the circular groove.
Example 2
A continuous carbon fiber CF/PAEK thermoplastic composite material supports the mould for the hasp, basically like embodiment 1, the difference lies in that the longitudinal section of the wedge block 4 is isosceles triangle-like, isosceles triangle-like is formed by isosceles triangle with base angle of 60 ° and extension line formed by extending a certain length from the base side of the isosceles triangle to the outside of both sides, the extension line is collinear with the base side, the base side of the isosceles triangle forms a horizontal middle part of the T shape; the sum of extension lines formed by extending the bottom edge of the isosceles triangle to the outside of the two sides by a certain length accounts for 25 percent of the side length of the bottom edge of the isosceles triangle; the length of the bottom side of the isosceles triangle is 40% of the length of the T-shaped cross section, and the width of the pressing block 1 is 250% of the length of the bottom side of the isosceles triangle.
Example 3
The method for manufacturing the supporting hasp by adopting the mold for the continuous carbon fiber CF/PEEK thermoplastic composite material supporting hasp prepared in the embodiment 1 comprises the following specific steps:
(1) preparation of prepreg: the continuous CF/PEEK prepreg takes continuous carbon fiber CF as a reinforcing phase and PEEK as a matrix phase (the mass content of PEEK resin is 60 percent), and is cut according to the requirement of blank size to prepare materials;
pretreatment of the mold: treating the mold by using a soft tool, removing surface glue residues, stains or rusty spots and the like, polishing by using 2000-mesh abrasive paper, spraying a layer of anti-sticking liquid reagent and a layer of paste glue film, and waiting for assembly of the mold;
(2) and (3) sequentially laying the cut prepreg in the lower die cavity 6 of the die to finish primary laying, dividing the upper die cavity plate into blocks into the lower die cavity plate, slightly knocking by using a rubber cone, and ensuring that the upper die cavity plate is placed reasonably and is close to the four sides of the lower die cavity plate 6. And further trimming the laying blank, and cutting and removing the excessive size. Pressing for 15min at 25 ℃ and under the pressure of 2MPa, and separating the cavity plate from the prefabricated blank of the product;
(3) assembling the die, namely assembling the bottom plate 7 and the die frame plate 2 into an outer die frame; then the lower cavity plate 6 is put into the mold frame, and the putting position is fixed on the bottom plate; then putting the product precast blank on the lower cavity plate 6; then, sliding the upper cavity plate in blocks (the left and right side plates slide to corresponding positions slowly along the boundary of the lower cavity, sliding while paying attention to the movement of the prepreg to prevent movement dislocation, the surface of the product has disorder grains, placing the wedge block 4 at a central position carefully from the top after placing the two side plates 3 at a predetermined position), then placing the pressing block 1, finishing the assembly of the mold, and placing the integral mold at the central position of a lower pressing plate of the press (the center of the surface of the lower pressing plate of the press is taken as the center, the outer frame of the mold is taken as the peripheral outline, and an area where the two coincide);
(4) carrying out cold pressing on the die, and properly exhausting at 2 MPa; the continuous CF/PAEK thermoplastic composite material support buckle 5 is prepared by adopting a high-temperature and high-pressure process and setting a program for heating, wherein a press can normally start a pressure-maintaining low-pressure state, such as 0.5-2 MPa, gradually pressurize to 10MPa after the temperature is increased to 390 ℃, and reduce the temperature to 198 ℃ for demoulding after the pressure is maintained for 80min, thereby realizing one-step molding.
The prepared continuous CF/PAEK thermoplastic composite material support hasp is a 90-degree bent support hasp, the tensile strength is 720MPa, the bending strength is 800MPa, the thermal deformation temperature is 330 ℃, the interlaminar shear strength is 85MPa, and the I-type interlaminar fracture toughness is 1430MPa/m1/2And the compression strength after impact is 230 MPa.
Example 4
The method for manufacturing the supporting hasp by adopting the mould for the continuous carbon fiber CF/PEKK thermoplastic composite material supporting hasp prepared in the embodiment 1 comprises the following specific steps:
(1) preparation of prepreg: the continuous CF/PEKK prepreg takes continuous carbon fiber CF as a reinforcing phase and PEKK as a matrix phase (the mass content of PEKK resin is 60%), and is firstly cut according to the requirement of blank size and prepared;
pretreatment of the mold: treating the mold by using a soft tool, removing surface glue residues, stains or rusty spots and the like, polishing by using 2000-mesh abrasive paper, spraying a layer of anti-sticking liquid reagent and a layer of paste glue film, and waiting for assembly of the mold;
(2) and (3) sequentially laying the cut prepreg in the lower die cavity 6 of the die to finish primary laying, dividing the upper die cavity plate into blocks into the lower die cavity plate, slightly knocking by using a rubber cone, and ensuring that the upper die cavity plate is placed reasonably and is close to the four sides of the lower die cavity plate 6. And further trimming the laying blank, and cutting and removing the excessive size. Pressing at 26 deg.C under 3MPa for 12min, and separating the cavity plate from the prefabricated blank;
(3) assembling the die, namely assembling the bottom plate 7 and the die frame plate 2 into an outer die frame; then the lower cavity plate 6 is put into the mold frame, and the putting position is fixed on the bottom plate; then putting the product precast blank on the lower cavity plate 6; then, sliding the upper cavity plate in blocks (the left and right side plates slide to corresponding positions slowly along the boundary of the lower cavity, sliding while paying attention to the movement of the prepreg to prevent movement dislocation, the surface of the product has disorder grains, placing the wedge block 4 at a central position carefully from the top after placing the two side plates 3 at a predetermined position), then placing the pressing block 1, finishing the assembly of the mold, and placing the integral mold at the central position of a lower pressing plate of the press (the center of the surface of the lower pressing plate of the press is taken as the center, the outer frame of the mold is taken as the peripheral outline, and an area where the two coincide);
(4) carrying out cold pressing on the die, and exhausting gas properly at 3 MPa; the continuous CF/PEKK thermoplastic composite material supporting hasp 5 is formed in one step by adopting a high-temperature high-pressure process and setting a program to heat up, wherein a press can normally start a pressure-maintaining low-pressure state, such as 0.5-2 MPa, gradually pressurize to 8MPa after the temperature rises to 365 ℃, and cool to 199 ℃ for demoulding after the pressure is maintained for 60 min.
The prepared continuous CF/PEKK thermoplastic composite material support hasp is a 90-degree bent support hasp, the tensile strength is 725MPa, the bending strength is 830MPa, the thermal deformation temperature is 332 ℃, the interlaminar shear strength is 83MPa, the I-type layer fracture toughness is 1400MPa/m1/2And the compression strength after impact is 232 MPa.
Example 5
The method for manufacturing the supporting hasp by adopting the mould for the continuous carbon fiber CF/PEKK thermoplastic composite material supporting hasp, which is prepared in the embodiment 2, comprises the following specific steps of:
(1) preparation of prepreg: the continuous CF/PEKK prepreg takes continuous carbon fiber CF as a reinforcing phase and PEKK as a matrix phase (the mass content of PEKK resin is 60%), and is firstly cut according to the requirement of blank size and prepared;
pretreatment of the mold: treating the mold by using a soft tool, removing surface glue residues, stains or rusty spots and the like, polishing by using 2000-mesh abrasive paper, spraying a layer of anti-sticking liquid reagent and a layer of paste glue film, and waiting for assembly of the mold;
(2) and (3) sequentially laying the cut prepreg in the lower die cavity 6 of the die to finish primary laying, dividing the upper die cavity plate into blocks into the lower die cavity plate, slightly knocking by using a rubber cone, and ensuring that the upper die cavity plate is placed reasonably and is close to the four sides of the lower die cavity plate 6. And further trimming the laying blank, and cutting and removing the excessive size. Pressing at 28 deg.C under 2.5MPa for 20min, and separating the cavity plate from the prefabricated blank;
(3) assembling the die, namely assembling the bottom plate 7 and the die frame plate 2 into an outer die frame; then the lower cavity plate 6 is put into the mold frame, and the putting position is fixed on the bottom plate; then putting the product precast blank on the lower cavity plate 6; then, sliding the upper cavity plate in blocks (the left and right side plates slide to corresponding positions slowly along the boundary of the lower cavity, sliding while paying attention to the movement of the prepreg to prevent movement dislocation, the surface of the product has disorder grains, placing the wedge block 4 at a central position carefully from the top after placing the two side plates 3 at a predetermined position), then placing the pressing block 1, finishing the assembly of the mold, and placing the integral mold at the central position of a lower pressing plate of the press (the center of the surface of the lower pressing plate of the press is taken as the center, the outer frame of the mold is taken as the peripheral outline, and an area where the two coincide);
(4) carrying out cold pressing on the die, and exhausting gas properly at 4 MPa; the continuous CF/PEKK thermoplastic composite material supporting hasp 5 is formed in one step by adopting a high-temperature high-pressure process and setting a program to heat up, wherein a press can normally start a pressure-maintaining low-pressure state, such as 0.5-2 MPa, gradually pressurize to 15MPa after the temperature is raised to 350 ℃, and cool to 200 ℃ for demoulding after the pressure is maintained for 10 min.
The prepared continuous CF/PEKK thermoplastic composite material support hasp is a 90-degree bent support hasp, the tensile strength is 730MPa, the bending strength is 832MPa, the thermal deformation temperature is 331 ℃, the interlaminar shear strength is 80MPa, the I-type layer fracture toughness is 1420MPa/m1/2And a post-impact compressive strength of 229 MPa.
Example 6
The method for manufacturing the supporting hasp by adopting the mold for the continuous carbon fiber CF/PEEK thermoplastic composite material supporting hasp prepared in the embodiment 2 comprises the following specific steps of:
(1) preparation of prepreg: the continuous CF/PEEK prepreg takes continuous carbon fiber CF as a reinforcing phase and PEEK as a matrix phase (the mass content of PEEK resin is 60 percent), and is cut according to the requirement of blank size to prepare materials;
pretreatment of the mold: treating the mold by using a soft tool, removing surface glue residues, stains or rusty spots and the like, polishing by using 2000-mesh abrasive paper, spraying a layer of anti-sticking liquid reagent and a layer of paste glue film, and waiting for assembly of the mold;
(2) and (3) sequentially laying the cut prepreg in the lower die cavity 6 of the die to finish primary laying, dividing the upper die cavity plate into blocks into the lower die cavity plate, slightly knocking by using a rubber cone, and ensuring that the upper die cavity plate is placed reasonably and is close to the four sides of the lower die cavity plate 6. And further trimming the laying blank, and cutting and removing the excessive size. Pressing at 25 deg.C under 3MPa for 30min, and separating the cavity plate from the prefabricated blank;
(3) assembling the die, namely assembling the bottom plate 7 and the die frame plate 2 into an outer die frame; then the lower cavity plate 6 is put into the mold frame, and the putting position is fixed on the bottom plate; then putting the product precast blank on the lower cavity plate 6; then, sliding the upper cavity plate in blocks (the left and right side plates slide to corresponding positions slowly along the boundary of the lower cavity, sliding while paying attention to the movement of the prepreg to prevent movement dislocation, the surface of the product has disorder grains, placing the wedge block 4 at a central position carefully from the top after placing the two side plates 3 at a predetermined position), then placing the pressing block 1, finishing the assembly of the mold, and placing the integral mold at the central position of a lower pressing plate of the press (the center of the surface of the lower pressing plate of the press is taken as the center, the outer frame of the mold is taken as the peripheral outline, and an area where the two coincide);
(4) cold pressing the die, and exhausting gas properly under 3.5 MPa;
and (3) adopting a high-temperature high-pressure process and setting a program to heat, wherein the press can normally start a pressure-maintaining low-pressure state, such as 0.5-2 MPa, gradually pressurizing to 4MPa after the temperature is increased to 410 ℃, maintaining the pressure for 15min, cooling to 195 ℃, and demoulding, thereby obtaining the continuous CF/PEEK thermoplastic composite material support hasp 5 through one-step forming.
The prepared continuous CF/PEEK thermoplastic composite material support hasp is a 90-degree bent support hasp, the tensile strength is 718MPa, the bending strength is 835MPa, the thermal deformation temperature is 330 ℃, the interlaminar shear strength is 86MPa, and the I-type interlaminar fracture toughness is 1428MPa/m1/2And the compression strength after impact is 235 MPa.
Claims (10)
1. A method for manufacturing a continuous carbon fiber CF/PAEK thermoplastic composite material support hasp is characterized in that: placing a prepreg taking continuous carbon fiber CF as a reinforcing phase and PAEK as a matrix phase as a raw material into an internal cavity of an assembled mold for molding; the assembled die comprises an upper die cavity plate and a lower die cavity plate (6) which are used for forming an internal die cavity and have a concave-convex matching structure, and a pressing block (1) which is used for being in contact with a press and pressing the upper die cavity plate; a mold frame plate (2) for accommodating the lower cavity plate (6), the upper cavity plate and the pressing block (1), and a bottom plate (7) for supporting the lower cavity plate (6);
the upper cavity plate is a solid plate-shaped structure which is formed by mutually splicing wedge blocks (4) and side plates (3) at two sides of the wedge blocks and has a T-shaped integral longitudinal section; the side plates (3) at two sides are positioned at the left part and the right part of the T shape, and the wedge-shaped block (4) is positioned at the right middle part of the T shape; the longitudinal section of the wedge-shaped block (4) is an isosceles triangle or an isosceles trapezoid, the isosceles triangle is formed by extending a certain length of extension line from the bottom edge of the isosceles triangle to the outer parts of two sides, the extension line is collinear with the bottom edge, the isosceles trapezoid is formed by extending a certain length of extension line from the lower bottom of the isosceles triangle to the outer parts of two sides, the extension line is collinear with the bottom edge, the bottom edge of the isosceles triangle or the lower bottom of the isosceles trapezoid forms the middle part of a cross of the T-shaped block, and the surface where the cross of the T-shaped block is located is the surface where the upper cavity plate is in contact with the pressing block (1).
2. The method for manufacturing the continuous carbon fiber CF/PAEK thermoplastic composite material support hasp according to claim 1, wherein the base angle of an isosceles triangle is 40-85 degrees, and the corresponding inner angle of the lower bottom of the isosceles trapezoid is 40-85 degrees;
the sum of extension lines formed by extending the bottom edge of the isosceles triangle or the lower bottom of the isosceles trapezoid to the outside of two sides by a certain length accounts for 20% -60% of the side length of the bottom edge of the isosceles triangle or the lower bottom of the isosceles trapezoid;
the length of the bottom side of the isosceles triangle or the lower bottom of the isosceles trapezoid is 20% -70% of the length of the first T-shaped cross, and the width of the pressing block (1) is 150% -300% of the length of the bottom side of the isosceles triangle or the lower bottom of the isosceles trapezoid;
the length of the upper bottom of the isosceles trapezoid is 25% -60% of the width of the T-shaped vertical.
3. The method for manufacturing the continuous carbon fiber CF/PAEK thermoplastic composite material support hasp according to claim 1, characterized in that, two mutually perpendicular grooves are arranged on one side of the bottom plate (7) back to the lower cavity plate (6), and the intersection point of the two grooves is positioned on the vertical central shaft of the outer frame of the die; the intersection point of the two grooves is provided with a circular groove, and circular metal is embedded in the circular groove.
4. The method for manufacturing the continuous carbon fiber CF/PAEK thermoplastic composite material support hasp according to claim 3, wherein the slotting directions of the two grooves are perpendicular to each other, and one of the slotting directions is parallel to any one side length on the orthographic projection surface of the bottom plate (7).
5. The method for manufacturing the continuous carbon fiber CF/PAEK thermoplastic composite material support hasp according to claim 3, wherein the diameter of the circular groove is 10 mm-100 mm;
the width of each groove is 10-100 mm, and the height of each groove is 5-20 mm.
6. The method for manufacturing the continuous carbon fiber CF/PAEK thermoplastic composite material support hasp according to claim 1, wherein after installation, the distance between the lower cavity plate (6), the upper cavity plate and the press block (1) and the inner side wall of the die frame plate (2) is 0.02 mm-1 mm.
7. The method for manufacturing the continuous carbon fiber CF/PAEK thermoplastic composite material support hasp according to any one of claims 1 to 6, comprising the following steps:
(1) manufacturing a product prefabricated blank: sequentially placing prepreg in a lower cavity plate (6) by taking continuous carbon fiber CF as a reinforcing phase and PAEK as a matrix phase to finish primary laying, dividing an upper cavity plate into designated positions in blocks, removing redundant ply blanks, and performing compression molding for a period of time to obtain a product prefabricated blank;
(2) assembling a mold: assembling the bottom plate (7) and the die frame plate (2) into a die outer frame; then fixing the lower cavity plate (6) on the bottom plate; then putting the product into a prefabricated blank; then the upper cavity plate is slid into the inner cavity plate in a partitioning manner, the product prefabricated blank is placed in the inner cavity, then the outer frame of the die is placed in the central part of the lower pressing plate of the pressing machine, and the pressing block is placed in the outer frame of the die;
(3) one-step forming: adopting a high-temperature high-pressure process to prepare a continuous CF/PAEK thermoplastic composite material supporting buckle in one step;
the high-temperature high-pressure process means that the temperature is 350-410 ℃, and the unit pressure of pressurization is 4-15 MPa;
the continuous CF/PAEK thermoplastic composite material supporting buckle is a 90-degree bent supporting buckle.
8. The method for manufacturing the continuous carbon fiber CF/PAEK thermoplastic composite material support hasp according to claim 7, wherein the pressing for a period of time is performed under a pressure of 1-3 MPa for 10-30 min at normal temperature.
9. The method as claimed in claim 7, wherein before the preform of the product is made, the supporting fastener is polished by the mold parts and sprayed with a mold release liquid agent and a paste adhesive film.
10. The method for manufacturing the continuous carbon fiber CF/PAEK thermoplastic composite material support hasp according to claim 7, wherein the one-step molding by adopting a high-temperature high-pressure process is as follows: firstly, cold pressing is carried out under the pressure of not more than 4Mpa, then the temperature is raised under pressure, after the temperature is raised to the required temperature, the temperature is preserved, the pressure is gradually increased to the set pressure, the temperature is preserved and maintained for 10min to 150min, and then the temperature is reduced to below 200 ℃ for demoulding, thus obtaining the support hasp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110659161.1A CN113386370B (en) | 2021-06-15 | 2021-06-15 | Manufacturing method of continuous carbon fiber CF/PAEK thermoplastic composite material support hasp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110659161.1A CN113386370B (en) | 2021-06-15 | 2021-06-15 | Manufacturing method of continuous carbon fiber CF/PAEK thermoplastic composite material support hasp |
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| CN107226960A (en) * | 2017-07-05 | 2017-10-03 | 泰安石英复合材料有限公司 | Thermoplastic fibre enhancing composite, preparation method and application |
| CN107377766A (en) * | 2017-08-09 | 2017-11-24 | 许莲丽 | A kind of combined dual-purpose stamping die |
| CN110624973A (en) * | 2019-11-17 | 2019-12-31 | 张变妮 | Split type section bar forming die |
| CN112848389A (en) * | 2020-12-21 | 2021-05-28 | 中南大学 | Method for rapidly forming hybrid fiber reinforced thermoplastic composite structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107226960A (en) * | 2017-07-05 | 2017-10-03 | 泰安石英复合材料有限公司 | Thermoplastic fibre enhancing composite, preparation method and application |
| CN107377766A (en) * | 2017-08-09 | 2017-11-24 | 许莲丽 | A kind of combined dual-purpose stamping die |
| CN110624973A (en) * | 2019-11-17 | 2019-12-31 | 张变妮 | Split type section bar forming die |
| CN112848389A (en) * | 2020-12-21 | 2021-05-28 | 中南大学 | Method for rapidly forming hybrid fiber reinforced thermoplastic composite structure |
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Address after: 213164 No. 7-16, Yangtze River Delta mold City, Wujin high tech Industrial Development Zone, Changzhou City, Jiangsu Province Patentee after: Jiangsu Junhua Special Polymer Materials Co.,Ltd. Patentee after: Changzhou junhang high performance composite material Co.,Ltd. Address before: 213164 No. 7-16, Yangtze River Delta mold City, Wujin high tech Industrial Development Zone, Changzhou City, Jiangsu Province Patentee before: JIANGSU JUNHUA HIGH PERFORMANCE SPECIALTY ENGINEERING PLASTICS (PEEK) PRODUCTS CO.,LTD. Patentee before: Changzhou junhang high performance composite material Co.,Ltd. |