CN110893691A - Forming process of composite material product - Google Patents
Forming process of composite material product Download PDFInfo
- Publication number
- CN110893691A CN110893691A CN201911235713.5A CN201911235713A CN110893691A CN 110893691 A CN110893691 A CN 110893691A CN 201911235713 A CN201911235713 A CN 201911235713A CN 110893691 A CN110893691 A CN 110893691A
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- China
- Prior art keywords
- die
- resin
- glue
- valve
- forming
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Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000002131 composite material Substances 0.000 title claims abstract description 17
- 239000003292 glue Substances 0.000 claims abstract description 25
- 238000000465 moulding Methods 0.000 claims abstract description 22
- 239000011347 resin Substances 0.000 claims abstract description 19
- 229920005989 resin Polymers 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000003365 glass fiber Substances 0.000 claims abstract description 7
- 238000013461 design Methods 0.000 claims abstract description 4
- 238000006073 displacement reaction Methods 0.000 claims abstract description 4
- 239000004744 fabric Substances 0.000 claims abstract description 4
- 239000000805 composite resin Substances 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 230000002265 prevention Effects 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 229920001187 thermosetting polymer Polymers 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 2
- 238000007723 die pressing method Methods 0.000 claims description 2
- 238000003825 pressing Methods 0.000 abstract description 10
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 238000009787 hand lay-up Methods 0.000 description 3
- 238000001721 transfer moulding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- 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
- 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
- B29C70/36—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 impregnating by casting, e.g. vacuum casting
Abstract
The invention belongs to the technical field of material preparation and processing, and particularly relates to a forming process of a composite material product, which comprises the following steps: s1: paving dry glass fibers and fabrics in a special tool according to a layer design to form a preformed body; s2: then preheating a molding press, and moving the preformed body into the heated lower molding die; s3: performing first film combination, enabling the upper forming die and the lower forming die to be folded through the operation of a stroke displacement control system, and reserving a height space which is not more than 5mm in a die cavity; s4: opening a switch valve of a vacuum pump, starting vacuumizing the closed mold, opening a glue inlet valve to feed glue at low pressure, and sucking the set amount of double-component glue into the mold cavity at low pressure through a metering valve; s5: closing the vacuumizing switch valve, and carrying out secondary mould pressing and mould assembly by using a mould press; s6: keeping the temperature and pressure of the mold to solidify the resin in the mold cavity; s7: the upper and lower forming dies are separated through the work of a molding press, and the product is ejected manually or automatically.
Description
Technical Field
The invention belongs to the technical field of material preparation and processing, and particularly relates to a forming process of a composite material product.
Background
The resin-based composite material has wide application due to the strong corrosion resistance designability, superior mechanical property and the like, and plays a very important role in the development of national economy construction.
In recent years, resin-based composite materials are widely applied to industries such as aerospace, rail transit, building, energy and the like, the requirements on the forming process of the resin-based composite materials are higher and higher, the traditional forming process of the resin-based composite materials comprises hand lay-up, winding, mould pressing, Resin Transfer Molding (RTM), spraying, pultrusion and the like, if the shape and the requirements of products are combined, the main forming process of special-shaped products only comprises mould pressing, hand lay-up, RTM and the like, the productivity efficiency of the hand lay-up and RTM processes is lower, and the efficiency of the mould pressing process is higher but the cost is higher because the raw materials are prepreg.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a forming process suitable for resin matrix composite materials, and solves the problems of low RTM efficiency, high mould pressing process cost and the like of the original forming process.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
a molding process of a composite material product comprises a molding press, a vacuum-pumping system and a glue feeding system, and comprises the following steps:
s1: paving dry glass fibers and fabrics in a special tool in a manual or automatic mode according to a layer design to form a preformed body;
s2: then opening the mould press and heating, preheating a lower forming mould, and moving the preformed body into the heated lower forming mould;
s3: performing first film combination, enabling an upper forming die and a lower forming die to be folded through the operation of a stroke displacement control system of a molding press, sealing the upper forming die and the lower forming die by adopting flexible sealing plastic cement, enabling the upper forming die and the lower forming die not to be completely matched in place, and reserving a height space not larger than 5mm in a die cavity;
s4: opening a switch valve of a vacuum pump, starting vacuumizing the closed mold, opening a glue inlet valve to feed glue at low pressure, and sucking the set amount of double-component glue into the mold cavity at low pressure through a metering valve; until the counter valve stops and closes;
s5: closing the vacuumizing switch valve, performing secondary die pressing and die assembly by using a die press, and extruding redundant resin in a die cavity into an overflow groove in the die;
s6: keeping the temperature and pressure of the mold, and setting according to the curing conditions of the resin to enable the resin to be cured in the mold cavity;
s7: the upper and lower forming dies are separated through the work of a molding press, and the product is ejected manually or automatically.
In a preferred embodiment of the present invention, the vacuum requirement after the mold is closed in step S4 is required to be lower than-0.095 Mpa.
As a preferable scheme of the invention, the composite material is a glass fiber reinforced thermosetting resin-based composite material.
In a preferred embodiment of the present invention, in step S5, the overflow prevention valve on the molding press prevents the resin from entering the glue injection pipe from the glue injection port.
As a preferable aspect of the present invention, in the step S5, the suction pipe is prevented from sucking the resin by the first anti-flooding valve on the molding press.
Compared with the prior art, the invention has the beneficial effects that:
a new composite material forming process can quickly combine a mould pressing process with an RTM (resin transfer molding) process, and solves the problems of high cost, defective products and the like in the RTM and the traditional mould pressing processes in a two-time mould pressing mode.
Drawings
The invention is further illustrated by the non-limiting examples given in the accompanying drawings;
FIG. 1 is a schematic view of a process flow structure of an embodiment of a molding process for a composite article according to the present invention;
the main element symbols are as follows:
the device comprises a mould press 1, an upper forming mould 2, a lower forming mould 3, a glue injection pipe 4, an exhaust pipe 5, a first overflow prevention valve 6, flexible sealing plastic 7, an overflow prevention valve 8, a glue inlet valve 9, a vacuum pump switch valve 11, two-component glue 12, a meter valve 13, a glue inlet system 14 and a vacuum pumping system 15.
Detailed Description
In order that those skilled in the art can better understand the present invention, the following technical solutions are further described with reference to the accompanying drawings and examples.
As shown in fig. 1, the forming process of a composite material product of the present invention includes using a molding press 1, a vacuum pumping system 15 and a glue feeding system 14, and includes the following steps:
s1: paving dry glass fibers and fabrics in a special tool in a manual or automatic mode according to a layer design to form a preformed body;
s2: then opening the molding press 1 and heating, preheating the lower forming die 3, and then moving the preformed body into the heated lower forming die 3;
s3: performing first film combination, enabling an upper forming die 2 and a lower forming die 3 to be folded through the operation of a stroke displacement control system of a molding press 1, sealing the upper forming die 2 and the lower forming die 3 by adopting flexible sealing plastic 7, enabling the upper forming die 2 and the lower forming die 3 not to be completely combined in place at the moment, and reserving a height space not larger than 5mm in a die cavity;
s4: opening a vacuum pump switch valve 11, starting to vacuumize the closed mold, opening a glue inlet valve 9 to feed glue at low pressure, and sucking a set amount of double-component glue 12 into the mold cavity at low pressure through a meter valve 13; until the meter valve 13 stops and closes;
s5: closing the vacuumizing switch valve 11, carrying out secondary mould pressing and mould closing by the mould pressing machine 1, and extruding redundant resin in a mould cavity into an overflow groove in the mould;
s6: keeping the temperature and pressure of the mold, and setting according to the curing conditions of the resin to enable the resin to be cured in the mold cavity;
s7: the upper and lower forming dies are separated through the work of a molding press, and the product is ejected manually or automatically.
Wherein, the vacuum degree is required to be lower than-0.095 Mpa after the mold is closed in step S4.
Wherein the composite material is a glass fiber reinforced thermosetting resin-based composite material.
In step S5, the overflow prevention valve 8 on the molding press prevents the resin from entering the glue injection pipe 4 from the glue injection port.
In step S5, the suction pipe 5 is prevented from sucking resin by the first anti-flooding valve 6 on the molding press.
The foregoing embodiments are merely illustrative of the principles of the present invention and its efficacy, and are not to be construed as limiting the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (5)
1. A molding process of a composite material product is characterized in that: the process comprises the following steps of using a molding press, a vacuum-pumping system and a glue feeding system of equipment:
s1: paving dry glass fibers and fabrics in a special tool in a manual or automatic mode according to a layer design to form a preformed body;
s2: then opening the mould press and heating, preheating a lower forming mould, and moving the preformed body into the heated lower forming mould;
s3: performing first film combination, enabling an upper forming die and a lower forming die to be folded through the operation of a stroke displacement control system of a molding press, sealing the upper forming die and the lower forming die by adopting flexible sealing plastic cement, enabling the upper forming die and the lower forming die not to be completely matched in place, and reserving a height space not larger than 5mm in a die cavity;
s4: opening a switch valve of a vacuum pump, starting vacuumizing the closed mold, opening a glue inlet valve to feed glue at low pressure, and sucking the set amount of double-component glue into the mold cavity at low pressure through a metering valve; until the counter valve stops and closes;
s5: closing the vacuumizing switch valve, performing secondary die pressing and die assembly by using a die press, and extruding redundant resin in a die cavity into an overflow groove in the die;
s6: keeping the temperature and pressure of the mold, and setting according to the curing conditions of the resin to enable the resin to be cured in the mold cavity;
s7: the upper and lower forming dies are separated through the work of a molding press, and the product is ejected manually or automatically.
2. A process for forming a composite article according to claim 1, wherein: the vacuum degree requirement after the mold is closed in the step S4 needs to be lower than-0.095 Mpa.
3. A process for forming a composite article according to claim 1, wherein: the composite material is a glass fiber reinforced thermosetting resin-based composite material.
4. A process for forming a composite article according to claim 1, wherein: in the step S5, the overflow prevention valve on the molding press prevents the resin from entering the glue injection pipe from the glue injection port.
5. A process for forming a composite article according to claim 1, wherein: in said step S5, the suction tube is prevented from sucking the resin by the first anti-flooding valve on the molding press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911235713.5A CN110893691A (en) | 2019-12-05 | 2019-12-05 | Forming process of composite material product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911235713.5A CN110893691A (en) | 2019-12-05 | 2019-12-05 | Forming process of composite material product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110893691A true CN110893691A (en) | 2020-03-20 |
Family
ID=69788695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911235713.5A Pending CN110893691A (en) | 2019-12-05 | 2019-12-05 | Forming process of composite material product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110893691A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113580608A (en) * | 2021-08-06 | 2021-11-02 | 巨石集团有限公司 | Vacuum compression molding equipment and process for composite material |
| CN113954387A (en) * | 2021-10-19 | 2022-01-21 | 杭州轮到你科技有限公司 | All-carbon hub forging process |
| CN114103179A (en) * | 2021-10-26 | 2022-03-01 | 湖北三江航天江北机械工程有限公司 | RTM (resin transfer molding) method for thermal insulation layer of diffusion section of carbon fiber material spray pipe |
| CN115042454A (en) * | 2022-05-31 | 2022-09-13 | 上海碳纤维复合材料创新研究院有限公司 | Forming process of fiber reinforced composite part |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106507737B (en) * | 2009-09-22 | 2013-08-28 | 中国人民解放军国防科学技术大学 | The pressure of latent composite antenna housing oozes forming method |
| CN109624198A (en) * | 2018-12-10 | 2019-04-16 | 重庆大学 | A kind of fiber cloth composite material forming method |
| CN110027226A (en) * | 2019-02-28 | 2019-07-19 | 东华大学 | A kind of P-RTM moulding process being used to prepare enhancing composite material |
-
2019
- 2019-12-05 CN CN201911235713.5A patent/CN110893691A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106507737B (en) * | 2009-09-22 | 2013-08-28 | 中国人民解放军国防科学技术大学 | The pressure of latent composite antenna housing oozes forming method |
| CN109624198A (en) * | 2018-12-10 | 2019-04-16 | 重庆大学 | A kind of fiber cloth composite material forming method |
| CN110027226A (en) * | 2019-02-28 | 2019-07-19 | 东华大学 | A kind of P-RTM moulding process being used to prepare enhancing composite material |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113580608A (en) * | 2021-08-06 | 2021-11-02 | 巨石集团有限公司 | Vacuum compression molding equipment and process for composite material |
| CN113954387A (en) * | 2021-10-19 | 2022-01-21 | 杭州轮到你科技有限公司 | All-carbon hub forging process |
| CN114103179A (en) * | 2021-10-26 | 2022-03-01 | 湖北三江航天江北机械工程有限公司 | RTM (resin transfer molding) method for thermal insulation layer of diffusion section of carbon fiber material spray pipe |
| CN115042454A (en) * | 2022-05-31 | 2022-09-13 | 上海碳纤维复合材料创新研究院有限公司 | Forming process of fiber reinforced composite part |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200320 |
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| RJ01 | Rejection of invention patent application after publication |