CN222779859U - Composite material mould - Google Patents
Composite material mould Download PDFInfo
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- CN222779859U CN222779859U CN202421508070.3U CN202421508070U CN222779859U CN 222779859 U CN222779859 U CN 222779859U CN 202421508070 U CN202421508070 U CN 202421508070U CN 222779859 U CN222779859 U CN 222779859U
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Abstract
The utility model discloses a composite material mold, which comprises a metal support frame and a composite material molded surface. The metal support frame is a grid support frame structure, and the molded surface of the composite material is a composite material multi-layer structure. The metal support frame is connected with the molded surface made of the composite material through a silica gel flexible support connection point. The mold has the advantages of small deformation, high appearance precision, low working time and energy consumption of the molded composite material part, low manufacturing cost of products, light weight, convenient transportation and the like, is particularly suitable for molding large-size composite material parts, and has wide market prospect in the field of composite material manufacturing such as aerospace and the like.
Description
Technical Field
The utility model relates to the technical field of forming dies, in particular to a composite material die.
Background
The molding of the composite part is generally performed in a molding die, and the molding of the final structure is completed at the same time as the molding of the material. With the great increase of the composite material consumption in the aerospace field, in order to meet the strict requirements of product manufacturing quality and zero allowance assembly, the requirements on the size and shape precision of composite material parts are higher and higher, the thermal expansion coefficient of the forming die for traditional metal materials such as low carbon steel, aluminum and the like is far higher than that of composite material parts, and particularly when large-size composite material parts are formed, the product size and shape precision cannot be guaranteed, the traditional metal material die is large in weight, inconvenient to transport and long in manufacturing period. In recent years, invar steel molds have been developed which have a thermal expansion coefficient similar to that of composite materials, but have low processing efficiency, poor thermal conductivity, large mold weight and high cost.
Therefore, it is needed to provide a mold made of composite materials to solve the above technical problems in the prior art.
Disclosure of utility model
The utility model aims to provide a composite material mold, which solves the problems in the prior art.
In order to achieve the above purpose, the utility model provides a composite material mold, which comprises a composite material molded surface and a support frame, wherein the composite material molded surface is arranged on the upper part of the support frame, a plurality of flexible support connection points are arranged between the composite material molded surface and the support frame, and the composite material molded surface is connected with the support frame through the flexible support connection points.
Preferably, the supporting frame is a metal supporting frame, the metal supporting frame is a grid supporting frame structure, the metal supporting frame comprises a plurality of longitudinal grid plates and a plurality of transverse grid plates, and the longitudinal grid plates are vertically connected and fixed with the transverse grid plates;
The flexible support connection points are silica gel flexible support connection points, and the silica gel flexible support connection points are fixedly arranged at the tops of the longitudinal grating plates and the transverse grating plates.
Preferably, two hanging points are arranged on two opposite side walls of the metal supporting frame, the two hanging points on the same side are symmetrically arranged, the hanging points on the two side walls are symmetrically arranged, two forklift points are arranged at the bottom of the metal supporting frame, and the two forklift points are symmetrically arranged.
Preferably, the outside of the peripheral net size area of the composite material molded surface is provided with a vacuum air guide channel, and a plurality of air guide holes are formed in the vacuum air guide channel at equal intervals.
Preferably, the edge of the flanging region and the edge of the arc region of the molded surface of the composite material are provided with laser-assisted layering positioning holes.
Preferably, the arc-shaped area of the composite material profile is provided with two reserved positions of the drilling and positioning hole fixture, and the reserved positions of the drilling and positioning hole fixture are used for installing the drilling and positioning hole fixture.
Preferably, the locating hole drilling tool comprises a locating hole drilling tool molded surface, a locating pin and a locking bolt are connected to the locating hole drilling tool molded surface, the locating hole drilling tool molded surface is mounted on the reserved position of the locating hole drilling tool on the composite material molded surface through the locating pin and the locking bolt, a drill bushing is arranged on the locating hole drilling tool molded surface, a fixing screw is connected to the locating hole drilling tool molded surface, and the drill bushing is mounted on the locating hole drilling tool molded surface through the fixing screw.
Preferably, the composite material profile is of a composite material multi-layer structure, and comprises a gel coat layer, an upper surface layer, a structural layer and a lower surface layer which are sequentially arranged from top to bottom, wherein the upper surface layer and the lower surface layer are both low-surface-density tooling prepreg layers, and the structural layer is a high-surface-density tooling prepreg layer.
Compared with the prior art, the utility model has the following advantages and technical effects:
The composite material mold provided by the utility model has the advantages that the thermal expansion coefficients of the molded surface of the composite material and the composite material workpiece to be molded are matched, so that the composite material workpiece with the dimensional accuracy and the appearance accuracy meeting the design requirements can be manufactured, the molded workpiece has small deformation, and is particularly suitable for manufacturing large-size composite material workpieces.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of a composite material mold according to the present utility model;
FIG. 2 is a schematic view of a metal support frame according to the present utility model;
FIG. 3 is a schematic view of tooling prepreg layup for a composite profile of the present utility model;
FIG. 4 is a schematic perspective view of a profile of a composite material according to the present utility model;
FIG. 5 is a front view of a composite profile of the present utility model;
FIG. 6 is a schematic view of a vacuum air guide channel according to the present utility model;
FIG. 7 is a schematic diagram of a three-dimensional structure of a tooling for drilling locating holes according to the present utility model;
FIG. 8 is a front view of the tooling for drilling locating holes of the present utility model;
In the figure, the profile of a composite material is 1, the profile of a composite material is 2, a metal supporting frame, 201, a longitudinal grid plate, 202, a transverse grid plate, 301, a first laser auxiliary paving positioning hole, 302, a second laser auxiliary paving positioning hole, 303, a third laser auxiliary paving positioning hole, 304, a fourth laser auxiliary paving positioning hole, 305, a fifth laser auxiliary paving positioning hole, 306, a sixth laser auxiliary paving positioning hole, 307, a seventh laser auxiliary paving positioning hole, 308, an eighth laser auxiliary paving positioning hole, 309, a second laser auxiliary paving positioning Kong Jiu, 310, a tenth laser auxiliary paving positioning hole, 4, a vacuum air guide channel, 501, a first hanging point, 502, a second hanging point, 503, a third hanging point, 504, a fourth hanging point, 601, a first forklift point, 701, a positioning pin, 702, a locking bolt, 703, a tool profile of a drilling positioning hole, 704, a fixing screw, 705, a drilling sleeve, 711, a reserved position of a glue tool, 712, a reserved position of a second positioning tool, 8, a flexible supporting connection point, 9, an air guide hole, a P1, a surface layer, a P2, a surface layer, a P3, a surface layer and a lower layer.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art without the inventive effort, are intended to be within the scope of the present utility model. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1 to 8, the present utility model provides a composite material mold, which comprises a composite material molding surface 1 and a support frame, wherein the composite material molding surface 1 is arranged at the upper part of the support frame, a plurality of flexible support connection points are arranged between the composite material molding surface 1 and the support frame, and the composite material molding surface 1 is connected with the support frame through the flexible support connection points;
The support frame is a metal support frame 2, the metal support frame 2 is a grid support frame structure, the metal support frame 2 comprises a plurality of longitudinal grid plates 201 and a plurality of transverse grid plates 202, and the longitudinal grid plates 201 are vertically connected and fixed with the transverse grid plates 202;
The flexible support connection points are silica gel flexible support connection points 8, and the silica gel flexible support connection points 8 are fixedly arranged at the tops of the longitudinal grating plates 201 and the transverse grating plates 202.
The metal support frame 2 is used as a support, the molded surface 1 made of the composite material is lighter, the metal support frame 2 can be made of metal plates with the thickness of 5-6 mm so as to lighten the overall weight of the die, and the silica gel flexible support connection points 8 are mainly used for harmonizing the difference of the thermal expansion coefficients of the metal support frame 2 and the molded surface 1 made of the composite material so as to keep the stability of the size and the molded surface precision of the molded surface 1 made of the composite material when the composite material is cured at high temperature, and other high-temperature-resistant flexible connection modes can be used in other embodiments.
In a further optimization scheme, four hanging points are arranged on two opposite side walls of the metal support frame 2, namely a hanging point I501, a hanging point II 502, a hanging point III 503 and a hanging point IV 504, wherein the hanging point I501 and the hanging point II 502 are positioned on the same side and are symmetrically arranged, the hanging point III 503 and the hanging point IV 504 are positioned on the same side and are symmetrically arranged, the hanging point 501, the hanging point 503 and the hanging point 502 are symmetrically arranged, two forklift points are arranged at the bottom of the metal support frame 2, namely a forklift point I601 and a forklift point II 602, and the two forklift points are symmetrically arranged.
The hanging points are of metal structures so that the crown block can conveniently hang the movable mould, and the forklift points are used for forklift to move the mould.
According to the further optimization scheme, a circle of vacuum air guide channels 4 are arranged outside the peripheral net-size area of the molded surface 1 of the composite material, the vacuum air guide channels 4 are provided with air guide holes 9, and when the composite material is solidified and molded, the vacuum air guide channels 4 can enable negative pressure to be distributed uniformly, no pressure gradient exists, and ventilation of all positions of the whole mold is facilitated.
According to a further optimization scheme, laser auxiliary pavement positioning holes are formed in the edge of a flanging area and the edge of an arc-shaped area of the composite material molded surface 1, two laser auxiliary pavement positioning holes are formed in each edge of the flanging area of the composite material molded surface 1, the first laser auxiliary pavement positioning hole 301 and the second laser auxiliary pavement positioning hole 302 are located on the same side, the sixth laser auxiliary pavement positioning hole 306 and the laser auxiliary pavement positioning Kong Qi are located on the same side, three laser auxiliary pavement positioning holes are formed in each edge of the arc-shaped area of the composite material molded surface 1, the third laser auxiliary pavement positioning hole 303, the fourth laser auxiliary pavement positioning hole 304 and the fifth laser auxiliary pavement positioning hole 305 are located on the same side, the eighth laser auxiliary pavement positioning hole 308, the laser auxiliary pavement positioning Kong Jiu and the tenth laser auxiliary pavement positioning hole 310 are located on the same side, and when the prepreg is paved, the laser auxiliary pavement positioning holes are matched with a laser positioning instrument, the laser positioning instrument can conduct accurate position projection to assist a subsequent worker to conduct prepreg paving.
The same side of the arc-shaped surface 1 of the composite material is provided with two reserved positions of the drilling and positioning hole tool, namely a first reserved position 711 of the drilling and positioning hole tool and a second reserved position 712 of the drilling and positioning hole tool, and the first reserved position 711 of the drilling and positioning hole tool and the second reserved position 712 of the drilling and positioning hole tool are used for installing the drilling and positioning hole tool. And a drilling positioning hole tool is used for drilling holes before demolding, so that the subsequent processing and positioning of the composite material workpiece are facilitated. In other embodiments, a reserved bit of the drilling and positioning tool can be arranged on the opposite side of the composite material molded surface 1.
In a further optimized scheme, the locating hole drilling tool comprises a locating hole drilling tool molded surface 703, a locating pin 701 and a locking bolt 702 are connected to the locating hole drilling tool molded surface 703, the locating hole drilling tool molded surface 703 is mounted on a locating hole drilling tool reserved position on the composite material molded surface 1 through the locating pin 701 and the locking bolt 702, a drill bushing 705 is arranged on the locating hole drilling tool molded surface 703, and the drill bushing 705 is mounted on the locating hole drilling tool molded surface 703 through a fixing screw 704.
According to a further optimization scheme, the composite material profile 1 is of a composite material multi-layer structure, the composite material profile 1 comprises a gel coat layer P1, an upper surface layer P2, a structural layer P3 and a lower surface layer P4 which are sequentially arranged from top to bottom, the upper surface layer P2 and the lower surface layer P4 are made of low-surface-density tooling prepreg, and the structural layer P3 is made of high-surface-density tooling prepreg.
A manufacturing method of a composite material mold comprises the following steps:
The female die is dehumidified, and is put into a curing furnace or an autoclave, the temperature is kept at 65+/-5 ℃, and the heat preservation time is 60 minutes;
Paving a gel coat layer P1 and a tooling prepreg layer on the surface of the female die block by block, vacuumizing and pre-compacting, vacuumizing to-0.06 MPa to-0.08 MPa, and pre-compacting for 15-20 min;
Continuously paving other tooling prepreg layers on the surface of the female die, and vacuumizing and pre-compacting every time 2-3 tooling prepreg layers are paved;
Packaging after paving a tooling prepreg layer on the female die, pre-curing, post-curing, cooling, demolding, and performing edge cutting processing according to the required dimensional accuracy;
The obtained composite material profile 1 is fixedly connected with the supporting frame.
The female die is of a steel-wood resin combined structure, the female die comprises a steel structure frame, a wood plate layer molded surface, a foam layer, a wood substitute resin layer and a glued demolding cloth layer which are sequentially arranged, after the wood plate layer molded surface is paved on the steel structure frame, the foam layer is constructed on the surface layer of the wood plate layer molded surface and is subjected to rough machining, the precision of the rough machining molded surface is +/-3 mm, the wood substitute resin layer is paved on the surface of the foam layer after rough machining, and the precision of the finish machining molded surface is +/-0.2 mm. And sticking a piece of adhesive demolding cloth on the finished molded surface to obtain the female mold for molding the molded surface 1 made of the composite material.
Further optimizing scheme, the specific operation of packaging after the tooling prepreg layer is laid on the female die is as follows:
And sequentially paving a separation film, stripping cloth, an airfelt and a vacuum bag film on the surface of the prepreg layer of the outermost tooling paved on the female die, and vacuumizing and pre-compacting.
Further optimizing scheme, the specific process steps of pre-curing comprise:
Heating from room temperature to T1 at a heating rate of 0.5-3 ℃ per minute;
preserving heat for 16-20 h at the temperature of T1;
cooling after heat preservation is finished, wherein the cooling rate is less than or equal to 3 ℃ per minute, and discharging the material from the tank below 50 ℃;
wherein the value range of T1 is 60-70 ℃.
Further optimizing scheme, the specific process steps of post-curing comprise:
Heating from room temperature to T2 at a heating rate of 0.1-0.5 ℃ per minute;
preserving heat at the temperature of T2 ℃ for 10-20 min;
Cooling from the T2 temperature to the T3 temperature at a cooling rate of 1-2 ℃ per minute;
preserving heat for 6-12 hours under the T3 temperature condition;
cooling after heat preservation is finished, wherein the cooling rate is less than or equal to 3 ℃ per minute, and discharging the steel into a tank below 60 ℃;
Wherein, the value range of T2 is 200-230 ℃, and the value range of T3 is 150-200 ℃.
The composite material mold provided by the utility model has the advantages that the thermal expansion coefficients of the composite material molded surface 1 and the composite material workpiece to be molded are matched, so that the composite material workpiece with the dimensional accuracy and the appearance accuracy meeting the design requirements can be manufactured, the molded workpiece has small deformation, is particularly suitable for manufacturing large-size composite material workpieces, in addition, the composite material mold has relatively light mass, is convenient for operation such as carrying during use, and can finish the curing period of the composite material workpiece with higher heating rate, so that the working time and the energy consumption are saved, and the manufacturing cost of the composite material workpiece is reduced.
The present application is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present application are intended to be included in the scope of the present application.
Claims (8)
1. The composite material mold is characterized by comprising a composite material molded surface (1) and a supporting frame, wherein the composite material molded surface (1) is arranged on the upper portion of the supporting frame, a plurality of flexible supporting connection points are arranged between the composite material molded surface (1) and the supporting frame, and the composite material molded surface (1) is connected with the supporting frame through the flexible supporting connection points.
2. The composite material mold according to claim 1, wherein the support frame is a metal support frame (2), the metal support frame (2) is a grid support frame structure, the metal support frame (2) comprises a plurality of longitudinal grid plates (201) and a plurality of transverse grid plates (202), and the longitudinal grid plates (201) are vertically connected and fixed with the transverse grid plates (202);
the flexible support connection points are silica gel flexible support connection points (8), and the silica gel flexible support connection points (8) are fixedly arranged at the tops of the longitudinal grating plates (201) and the transverse grating plates (202).
3. The composite material mold according to claim 2, wherein two hanging points are arranged on two opposite side walls of the metal support frame (2), the two hanging points on the same side are symmetrically arranged, the hanging points on the two side walls are symmetrically arranged, two forklift points are arranged at the bottom of the metal support frame (2), and the two forklift points are symmetrically arranged.
4. The composite material mold according to claim 1, wherein a vacuum air guide channel (4) is arranged outside the peripheral net size area of the composite material molded surface (1), and a plurality of air guide holes (9) are formed in the vacuum air guide channel (4) at equal intervals.
5. The composite material mold according to claim 1, wherein the flanging region edge and the arc region edge of the composite material molded surface (1) are provided with laser-assisted layering positioning holes.
6. The composite material mold according to claim 1, characterized in that the arc-shaped area of the composite material profile (1) is provided with two tooling reservations for drilling and positioning holes, which tooling reservations are used for installing tooling for drilling and positioning holes.
7. The composite material mold according to claim 6, wherein the positioning hole drilling tool comprises a positioning hole drilling tool molding surface (703), a positioning pin (701) and a locking bolt (702) are connected to the positioning hole drilling tool molding surface (703), the positioning hole drilling tool molding surface (703) is mounted on the composite material molding surface (1) at a reserved position of the positioning hole drilling tool through the positioning pin (701) and the locking bolt (702), a drill bushing (705) is arranged on the positioning hole drilling tool molding surface (703), a fixing screw (704) is connected to the positioning hole drilling tool molding surface (703), and the drill bushing (705) is mounted on the positioning hole drilling tool molding surface (703) through the fixing screw (704).
8. The composite material mold according to claim 5, wherein the composite material molded surface (1) is of a composite material multi-layer structure, the composite material molded surface (1) comprises a gel coat layer (P1), an upper surface layer (P2), a structural layer (P3) and a lower surface layer (P4) which are sequentially arranged from top to bottom, the upper surface layer (P2) and the lower surface layer (P4) are low-surface-density tooling prepreg layers, and the structural layer (P3) is a high-surface-density tooling prepreg layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421508070.3U CN222779859U (en) | 2024-06-28 | 2024-06-28 | Composite material mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421508070.3U CN222779859U (en) | 2024-06-28 | 2024-06-28 | Composite material mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222779859U true CN222779859U (en) | 2025-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421508070.3U Active CN222779859U (en) | 2024-06-28 | 2024-06-28 | Composite material mould |
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|---|---|
| CN (1) | CN222779859U (en) |
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- 2024-06-28 CN CN202421508070.3U patent/CN222779859U/en active Active
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