CN110948906A - Manufacturing process of carbon fiber automobile door outer panel - Google Patents
Manufacturing process of carbon fiber automobile door outer panel Download PDFInfo
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- CN110948906A CN110948906A CN201911249132.7A CN201911249132A CN110948906A CN 110948906 A CN110948906 A CN 110948906A CN 201911249132 A CN201911249132 A CN 201911249132A CN 110948906 A CN110948906 A CN 110948906A
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- die
- knife edge
- cavity
- carbon fiber
- lower die
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 27
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 27
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000005086 pumping Methods 0.000 claims abstract description 10
- 238000005520 cutting process Methods 0.000 claims abstract description 9
- 239000004744 fabric Substances 0.000 claims abstract description 9
- 239000003292 glue Substances 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 29
- 239000000047 product Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 13
- 239000011347 resin Substances 0.000 claims description 10
- 229920005989 resin Polymers 0.000 claims description 10
- 230000006698 induction Effects 0.000 claims description 8
- 238000004513 sizing Methods 0.000 claims description 6
- 230000001154 acute effect Effects 0.000 claims description 3
- 239000012265 solid product Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 abstract description 7
- 238000005498 polishing Methods 0.000 abstract description 3
- 239000000835 fiber Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007723 die pressing method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
-
- 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
- B29C33/0038—Moulds or cores; Details thereof or accessories therefor with sealing means or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a manufacturing process of a carbon fiber automobile door outer plate, which comprises the steps of 1) manufacturing a special forming die, 2) laying carbon fiber cloth, 3) closing the die and injecting glue, simultaneously performing vacuumizing operation, 4) curing and pressure maintaining, and 5) demoulding and taking out. A knife edge (4) for cutting flash generated during molding is arranged at the edge of a cavity (3) of a lower die (2) in a molding die, and the molding die further comprises a vacuum pumping device. By adopting the manufacturing process, the die can be molded at one time without subsequent cutting of the extending edge and polishing of the cutting edge, so that the process is simple, the production efficiency is high, and the product quality can be ensured.
Description
Technical Field
The invention relates to the technical field of forming of carbon fiber products, in particular to a manufacturing process of a carbon fiber automobile door outer panel.
Background
The existing automobile parts are developed towards the direction of light weight, so that the strength of the automobile parts is ensured, and the weight of the automobile parts is reduced as much as possible. For an automobile door outer panel, it is preferable that it is both strong and lightweight. Carbon fiber materials are therefore commonly used for their manufacture because carbon fibers have the advantages of being lighter in weight than aluminum, stronger than steel, resistant to corrosion, resistant to high temperatures, and high in modulus. At present, various methods for manufacturing carbon fiber products are available, and the most suitable method for manufacturing the automobile door outer panel is a compression molding method. The molding method is that the carbon fiber material which is pre-soaked with resin is placed into a metal molding die, the material fills the die cavity under the pressure and temperature of a hydraulic press, residual air is discharged, meanwhile, redundant glue solution overflows, then the resin is cured and molded through high temperature and high pressure for a certain time, and a finished product is obtained after demolding. However, such a forming die of the prior art has the following disadvantages:
1) because a circle of extending edges are required to be formed around the die cavity in the forming process of the carbon fiber in the prior art, when the continuous fiber cloth presoaked with the resin is paved on the die, the continuous fiber cloth cannot be paved very orderly, and once the continuous fiber cloth is paved irregularly, the problems of separation of the cloth and the material, warping of products, uneven product density and the like can be caused; therefore, a circle of extending edge is arranged around the die cavity for placing the periphery of the carbon fiber cloth beyond the range of the die cavity, which is generally called as glue overflow type carbon fiber die pressing technology; in this way, after the product is formed and taken out of the die, the extending edge needs to be cut off, but the edge of the cut product is sharp, so that potential safety hazards exist, and a subsequent edge polishing process is needed; therefore, the existing manufacturing process has more processes and low production efficiency;
2) because the door outer plate is not a regular part, as shown in the attached figure 1, a bend is arranged between the upper part and the lower part of the door plate, a concave door handle installation space is arranged at the bend, and an installation through hole for installing a vehicle window is arranged at the upper part of the door plate; therefore, the resin material is easily out of reach at the corner of the detail during the molding, thereby causing the defect of the molded product.
Disclosure of Invention
The invention aims to solve the technical problem of providing a manufacturing process of a carbon fiber automobile door outer panel, which can be molded by one-step molding through a mold without subsequent cutting of an extending edge and polishing of a cutting edge, thereby having simple process and high production efficiency and simultaneously ensuring the product quality.
In order to solve the technical problem, the invention provides a manufacturing process of a carbon fiber automobile door outer panel, which comprises the following steps:
1) manufacturing a special forming die, wherein the forming die comprises an upper die and a lower die, the upper die and the lower die form a product cavity after die assembly, the lower die is provided with a concave flash tank at the edge of the cavity, and the edge of the cavity of the lower die is provided with a knife edge for cutting flash generated during forming; the forming die further comprises a vacuumizing device, wherein the vacuumizing device comprises a controller, an air exhaust head and a pneumatic valve, the controller, the air exhaust head and the pneumatic valve are respectively connected in the die, the controller is in driving connection with the pneumatic valve, one end of the air exhaust head is connected with the pneumatic valve, and the other end of the air exhaust head is connected with the die and is communicated with an air channel which is arranged in the die and is communicated with the die cavity; an elastic limiting piece during die assembly is further arranged between the upper die and the lower die and is installed on the lower die, and an induction element which can transmit a pressure signal to a controller in the vacuum pumping device to drive the pneumatic valve to work when the pressure is applied to the elastic limiting piece is arranged on the elastic limiting piece;
2) laying carbon fiber cloth on the mold to completely cover the cavity;
3) closing the die, when the upper die contacts the elastic limiting part, an induction element on the elastic limiting part transmits a signal to a vacuum pumping device to drive a pneumatic valve to start pumping air until the inside of the cavity is in a vacuum state, and at the moment, the resin sizing material gradually overflows into a glue overflow groove and is filled in the whole cavity; meanwhile, when the upper die and the lower die are completely closed, overflowing resin sizing material is cut off through a knife edge on the lower die;
4) solidifying the fluidity in the forming die to obtain a solid product; and maintaining the pressure;
5) and (5) demolding and taking out.
The elastic limiting part is a sealing ring, a sealing groove for forming a closed loop is formed in the outer side of the profile of the cavity of the lower die, and the sealing ring is embedded in the sealing groove and protrudes out of the surface of the lower die.
The sealing ring comprises an upper part and a lower part which are integrally formed, the lower part is tightly matched in the sealing groove and matched with the sealing groove in shape, and the cross section of the upper part is in a semicircular shape protruding outwards; the lower part is provided with an inductive element.
A boss is arranged between the sealing groove and the flash tank on the lower die, a groove is arranged at the matching position of the upper die and the boss, and the groove is communicated with a gas path channel for vacuumizing in the upper die.
The knife edge comprises a knife edge upper inclined plane and a knife edge side inclined plane, one side of the knife edge upper inclined plane is connected with the lower die cavity surface, the other side of the knife edge upper inclined plane is intersected with the knife edge side inclined plane to form a knife edge with an acute included angle, the knife edge side inclined plane is connected with the flash tank, and the knife edge end is higher than the connecting end of the knife edge upper inclined plane and the die cavity surface.
Compared with the prior art, the method has the following advantages that:
1) because the edge of the profile of the cavity of the lower die is a circle of knife edge, the excessive flash material can be cut off by matching with the movement of the upper die during die assembly, so that the shape and the size required by a molded product are taken out of the die after die opening; therefore, the working procedures of later cutting, polishing and the like are omitted, the production efficiency is greatly improved, and the production cost is reduced; meanwhile, the arrangement of the vacuumizing device ensures that the cavity in the mold is in a vacuum state during mold closing, so that the rubber can fully flow to each corner of the cavity in the vacuumizing process, and the rubber is firmer, thereby avoiding the quality defect of a molded product and further improving the production yield;
2) the arrangement of the elastic limiting block and the induction element can timely transmit signals to a controller of the vacuumizing device to further perform the next operation on the one hand, and on the other hand, the tightness of the upper die and the lower die during die assembly is enhanced, so that a cavity in the die is further ensured to be in a vacuum state during die assembly;
3) the elastic limiting block is designed into a structure with a lower part and an upper part, wherein the lower part is matched with the shape of the sealing groove, and the cross section of the upper part is in a semicircular shape protruding outwards, so that the lower part can be firmly connected with the sealing groove, and the upper part is more sensitive to contact with the upper die, so that the sensing energy of the sensing element is more accurate and sensitive;
4) the boss is arranged at the vacuumized air passage of the lower die, so that the phenomenon that the rubber material overflows from the flash tank and then flows to the air passage opening to block the air passage opening is avoided, and the normal operation of the vacuumizing device in the die is guaranteed.
Drawings
FIG. 1 is a schematic structural view of a carbon fiber automobile door outer panel according to the present invention.
Fig. 2 is a schematic structural diagram of a forming die of a carbon fiber automobile door outer panel in the invention.
Fig. 3 is an enlarged schematic view of a portion a in fig. 2.
Fig. 4 is an enlarged schematic view of a portion B in fig. 3.
Fig. 5 is an enlarged schematic view of the portion C in fig. 3.
FIG. 6 is a schematic view of the lower die structure of the present invention.
FIG. 7 is a schematic view of the structure of the vacuum extractor of the present invention.
Wherein, 1, an upper die; 2. a lower die; 3. a cavity; 4. a knife edge; 4-1, an upper inclined plane of the knife edge; 4-2, a knife edge side inclined plane; 5. a flash tank; 6. an elastic limiting part; 6-1, upper part; 6-2, lower part; 7. a gas path channel; 8. a boss; 9. a sealing groove; 10. a groove; 11. a pneumatic valve; 12. an air exhaust head.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As can be seen from the schematic structural views of the forming mold used in the manufacturing process of the carbon fiber automobile door outer panel of the present invention shown in fig. 1 to 7, the manufacturing process of the carbon fiber automobile door outer panel includes the following steps:
1) manufacturing a special forming die, wherein the forming die comprises an upper die 1 and a lower die 2, the upper die 1 and the lower die 2 form a product cavity 3 after die assembly, the lower die 2 is provided with a concave flash groove 5 at the edge of the cavity 3, and the lower die 2 is provided with a knife edge 4 used for cutting flash generated during forming at the edge of the cavity 3; the forming die further comprises a vacuumizing device, wherein the vacuumizing device comprises a controller, an air suction head 12 and a pneumatic valve 11, the controller, the air suction head 12 and the pneumatic valve 11 are respectively connected in the die, the controller is in driving connection with the pneumatic valve 11, one end of the air suction head 12 is connected with the pneumatic valve 11, and the other end of the air suction head 12 is connected with the die and is communicated with an air channel 7 which is arranged in the die and communicated with the die cavity 3; an elastic limiting piece 6 during die assembly is further arranged between the upper die 1 and the lower die 2, the elastic limiting piece 6 is installed on the lower die 2, and an induction element which can transmit a pressure signal to a controller in the vacuum pumping device to drive the pneumatic valve 11 to work when the elastic limiting piece 6 is subjected to pressure is arranged on the elastic limiting piece 6;
2) laying carbon fiber cloth on the mold to completely cover the cavity;
3) closing the die, when the upper die 1 contacts the elastic limiting part 6, an induction element on the elastic limiting part 6 transmits a signal to a vacuumizing device to drive a pneumatic valve 11 to start air suction until the inside of the die cavity 3 is in a vacuum state, and at the moment, the resin sizing material gradually overflows into a glue overflow groove and is filled in the whole die cavity; meanwhile, when the upper die 1 and the lower die are completely closed, the overflowing resin sizing material is cut off through a knife edge 4 on the lower die 2;
4) solidifying the fluidity in the forming die to obtain a solid product; and maintaining the pressure;
5) and (5) demolding and taking out.
In the forming die, the elastic limiting part 6 is a sealing ring, the lower die 2 is provided with a sealing groove 9 forming a closed loop outside the profile of the cavity, and the sealing ring is embedded in the sealing groove 9 and protrudes out of the surface of the lower die 2.
In the forming die, the sealing ring comprises an upper part 6-1 and a lower part 6-2 which are integrally formed, the lower part 6-2 is tightly matched in the sealing groove 9 and matched with the sealing groove 9 in shape, and the cross section of the upper part 6-1 is in a semicircular shape protruding outwards; an inductive element is arranged in the lower part 6-2. In this embodiment, the cross-sectional shape of the lower portion 6-2 is a rectangle matching the shape of the sealing groove 9, and the plane of the junction of the lower portion 6-2 and the upper portion 6-1 is not higher than the surface of the lower mold at the sealing groove 9.
In the forming die, a boss 8 is arranged between a sealing groove 9 and the flash tank 5 on the lower die 2, a groove 10 is arranged at the matching part of the upper die 1 and the boss 8, and the groove 10 is communicated with an air passage channel 7 for vacuumizing in the upper die 1.
In the forming die, the knife edge 4 comprises a knife edge upper inclined plane 4-1 and a knife edge side inclined plane 4-2, one side of the knife edge upper inclined plane 4-1 is connected with the lower die cavity surface, the other side of the knife edge upper inclined plane is intersected with the knife edge side inclined plane 4-2 to form the knife edge 4 with an acute included angle, the knife edge side inclined plane 4-2 is connected with the flash tank 5, and the knife edge end is higher than the connecting end of the knife edge upper inclined plane 4-1 and the die cavity surface.
The above description is only a preferred embodiment of the present invention, and it should not be understood that the scope of the present invention is limited thereby, and it should be understood by those skilled in the art that various other modifications and equivalent arrangements can be made by applying the technical solutions and concepts of the present invention within the scope of the present invention as defined in the appended claims.
Claims (5)
1. A manufacturing process of a carbon fiber automobile door outer panel is characterized by comprising the following steps: it comprises the following steps:
1) manufacturing a special forming die, wherein the forming die comprises an upper die (1) and a lower die (2), a product cavity (3) is formed by the upper die (1) and the lower die (2) after die assembly, an inwards concave flash groove (5) is formed in the edge of the cavity (3) of the lower die (2), and a knife edge (4) used for cutting flash generated during forming is arranged at the edge of the cavity (3) of the lower die (2); the forming die further comprises a vacuumizing device, wherein the vacuumizing device comprises a controller, an air-pumping head (12) and a pneumatic valve (11), the controller, the air-pumping head (12) and the pneumatic valve (11) are respectively connected in the die, the controller is in driving connection with the pneumatic valve (11), one end of the air-pumping head (12) is connected with the pneumatic valve (11), and the other end of the air-pumping head is connected with the die and communicated with an air channel (7) which is arranged in the die and communicated with the die cavity (3); an elastic limiting piece (6) during die assembly is further arranged between the upper die (1) and the lower die (2), the elastic limiting piece (6) is installed on the lower die (2), and an induction element which can transmit a pressure signal to a controller in the vacuum pumping device to drive the pneumatic valve (11) to work when the elastic limiting piece (6) is under pressure is arranged on the elastic limiting piece (6);
2) laying carbon fiber cloth on the mold to completely cover the cavity;
3) closing the die, wherein when the upper die (1) contacts the elastic limiting part (6), an induction element on the elastic limiting part (6) transmits a signal to a vacuumizing device to drive a pneumatic valve (11) to start air suction until the inside of the die cavity (3) is in a vacuum state, and at the moment, the resin sizing material gradually overflows into a glue overflow groove and is filled in the whole die cavity; meanwhile, when the upper die (1) and the lower die are completely closed, overflowing resin sizing material is cut off through a knife edge (4) on the lower die (2);
4) solidifying the fluidity in the forming die to obtain a solid product; and maintaining the pressure;
5) and (5) demolding and taking out.
2. The manufacturing process of a carbon fiber automobile door outer panel according to claim 1, characterized in that: the elastic limiting part (6) is a sealing ring, a sealing groove (9) forming a closed ring is formed in the outer side of the profile of the cavity of the lower die (2), and the sealing ring is embedded in the sealing groove (9) and protrudes out of the surface of the lower die (2).
3. The manufacturing process of a carbon fiber automobile door outer panel according to claim 2, characterized in that: the sealing ring comprises an upper part (6-1) and a lower part (6-2) which are integrally formed, the lower part (6-2) is tightly matched in the sealing groove (9) and matched with the sealing groove (9) in shape, and the cross section of the upper part (6-1) is in a semicircular shape protruding outwards; the lower part (6-2) is provided with an induction element.
4. A process for manufacturing a carbon fiber automobile door outer panel according to claim 3, wherein: a boss (8) is arranged between the sealing groove (9) and the flash groove (5) on the lower die (2), a groove (10) is arranged at the matching position of the upper die (1) and the boss (8), and the groove (10) is communicated with a gas path channel (7) which is used for vacuumizing and arranged in the upper die (1).
5. The manufacturing process of a carbon fiber automobile door outer panel according to claim 1, characterized in that: the knife edge (4) comprises a knife edge upper inclined plane (4-1) and a knife edge side inclined plane (4-2), one side of the knife edge upper inclined plane (4-1) is connected with the lower die cavity surface, the other side of the knife edge upper inclined plane (4-1) is intersected with the knife edge side inclined plane (4-2) to form a knife edge (4) with an acute included angle, the knife edge side inclined plane (4-2) is connected with the flash tank (5), and the knife edge end is higher than the connecting end of the knife edge upper inclined plane (4-1) and the die cavity surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911249132.7A CN110948906B (en) | 2019-12-09 | 2019-12-09 | Manufacturing process of carbon fiber automobile door outer plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911249132.7A CN110948906B (en) | 2019-12-09 | 2019-12-09 | Manufacturing process of carbon fiber automobile door outer plate |
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| Publication Number | Publication Date |
|---|---|
| CN110948906A true CN110948906A (en) | 2020-04-03 |
| CN110948906B CN110948906B (en) | 2024-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911249132.7A Active CN110948906B (en) | 2019-12-09 | 2019-12-09 | Manufacturing process of carbon fiber automobile door outer plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112094395A (en) * | 2020-08-19 | 2020-12-18 | 王乐 | High-molecular TPU polyurethane elastomer |
| CN114670374A (en) * | 2022-04-08 | 2022-06-28 | 成都希瑞方晓科技有限公司 | Forming die for sealing rubber cap |
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