CN110815868A - Auxiliary plate suitable for vacuum introduction - Google Patents
Auxiliary plate suitable for vacuum introduction Download PDFInfo
- Publication number
- CN110815868A CN110815868A CN201911197128.0A CN201911197128A CN110815868A CN 110815868 A CN110815868 A CN 110815868A CN 201911197128 A CN201911197128 A CN 201911197128A CN 110815868 A CN110815868 A CN 110815868A
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- Prior art keywords
- auxiliary plate
- auxiliary
- resin
- vacuum
- plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
- B29C70/443—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding and impregnating by vacuum or injection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses an auxiliary plate suitable for vacuum infusion, wherein the upper surface of the auxiliary plate is provided with a flow guide groove and micropores for guiding resin to flow, and the lower surface of the auxiliary plate is coated with a layer of metal foil; the auxiliary plate has certain flexibility, has certain fitting degree with a product, can be peeled from resin, and can be recycled; the auxiliary board can replace a flow guide net and demolding cloth, the auxiliary board is paved on the surface of the manufactured fiber, then the absorbent collodion is paved on the auxiliary board, then the whole system is closed, the whole system is vacuumized, and resin is absorbed through negative pressure, so that vacuum introduction molding is completed.
Description
Technical Field
The invention relates to an auxiliary plate suitable for vacuum infusion, and belongs to the field of vacuum infusion molding auxiliary materials.
Background
Vacuum introduction molding can be used for manufacturing a workpiece with a larger size due to good molding environment, so that the vacuum introduction molding is more and more widely applied to the field of composite material molding.
The traditional vacuum infusion molding adopts a single-sided mold, a preformed body is laid on the mold, then demolding cloth, a flow guide net, a flow guide pipe, a vacuum pipe and a vacuum bag film are laid, the system is sealed, then the system is vacuumized, and the resin is infused into the system to soak fibers under the action of vacuum negative pressure. The product formed by the process has the advantages of less bubbles, high fiber content, high product strength and smooth and flat surface. However, the process needs a lot of working time for laying the demolding cloth, the flow guide medium, the flow guide pipe and the vacuum system, and the vacuum bag film, the flow guide net and the demolding cloth are consumable materials and cannot be reused, so that a lot of industrial garbage is formed, and the production cost is increased. In order to solve the problem, a penman researches an auxiliary plate, directly lays the auxiliary plate on the surface of the fiber instead of a flow guide net and demolding cloth during molding, then lays a vacuum tube and a resin tube, seals a system, vacuumizes and injects resin. The auxiliary plate can be repeatedly used, so that the pollution is reduced, and the cost is saved.
Disclosure of Invention
In order to reduce the consumption of consumables in the forming process and reduce the environmental pollution, the invention aims to provide a vacuum auxiliary plate which can not only successfully demould but also guide flow, and can be repeatedly used.
In order to solve the technical problems, the invention adopts the following technical scheme:
the auxiliary board suitable for vacuum introduction has one layer of metal foil on its lower surface, fiber connected to the lower surface, resin flow guiding grooves and micropores in its upper surface, and the auxiliary board has certain flexibility and can be stripped from resin.
Furthermore, a layer of metal foil is attached to the lower surface of the auxiliary plate.
Furthermore, the auxiliary plate is provided with a flow guide groove and a micropore.
Furthermore, the width of the flow guide groove of the auxiliary plate is 1-3mm, the depth of the groove is 2-4mm, the groove spacing is 20-60mm, the aperture is 1-2mm, and the hole spacing is 20-40 mm.
Furthermore, the auxiliary board has certain flexibility and certain fitting property with products.
Furthermore, the auxiliary plate can be a silica gel plate, a rubber plate and an other plastic plate.
Further, a layer of glue absorption cotton is paved on the auxiliary plate.
Compared with the prior art, the invention has the following benefits:
the lower surface of the auxiliary plate is attached with the metal foil, so that the surface of a manufactured product is smooth, and the product can be smoothly demoulded; the grooves of the auxiliary plate are beneficial to resin flowing and enhance the wettability of the fibers; the auxiliary plate has certain flexibility, can be attached to a product, and can obtain a better flow guide effect. Compared with the prior patent [201210159553.2], the metal foil on the bottom surface is easier to demould, the surface of the product is smooth, the mirror effect can be achieved, and the metal foil can replace demould cloth and a flow guide net, reduce industrial garbage and reduce cost.
Drawings
FIG. 1 is a schematic view of vacuum infusion molding according to the present invention;
FIG. 2 is a side view of the patent auxiliary plate of the present invention
FIG. 3 is a top view of the patent auxiliary plate of the present invention
In the figure, 1-vacuum bag film, 2-auxiliary plate, 3-adhesive cotton, 4-product, 5-resin inlet, 6-resin outlet, 7-mould, 8-metal foil, 9-diversion trench and 10-micropore
Detailed description of the preferred embodiment
Example 1
The core material of the sandwich structure is ROHACELL 71IG closed-cell foam with the density of 75kg/m3The size is 600mm multiplied by 1000mm multiplied by 15mm, the upper panel and the lower panel adopt glass fiber checked cloth and twill cloth, the resin adopts TDE85 epoxy resin, and the interlayer composite material is manufactured by utilizing a vacuum assisted RTM forming process.
1 laying a flow guide cloth and a demoulding cloth on a mould;
2, placing the fiber prefabricated part on the demolding cloth, and enabling one end of the flow guide cloth to be 40mm away from the fiber edge;
3, laying the processed core material on the prefabricated member, wherein the width of a groove drainage groove is 2mm, the depth of the groove drainage groove is 3mm, the groove distance is 40mm, the width of a main groove is 4mm, the depth of the main groove is 3mm, the main groove distance is 300mm, the aperture is 2mm, and the hole distance is 40 mm;
4 laying the fiber preform on the foam core
5, sequentially placing the demolding cloth and the flow guide cloth on the fiber in the same laying method as 1;
6 sealing the die cavity by adopting a vacuum bag and sealant;
7, vacuumizing the mould, and injecting the mixed resin system into the mould cavity through an RTM (resin transfer molding) injection machine when the vacuum pressure is less than 0.09 MPa; when the resin filling is finished and the fibers are fully soaked, continuously vacuumizing for 10min, and sealing the glue injection and vacuum tube;
8, curing at 120 ℃ for 4h and at 140 ℃ for 2h, and then demolding.
The properties of the article in this example are as follows:
example 2
The sandwich structure is characterized in that a core material of the sandwich structure is made of polyester foam, the size of the core material is 600mm multiplied by 1000mm multiplied by 15mm, the upper panel and the lower panel are made of glass fiber checked cloth and twill cloth, resin is made of TDE85 epoxy resin, and a vacuum assisted RTM (resin transfer molding) process is utilized to manufacture the sandwich composite material.
1 laying a flow guide cloth and a demoulding cloth on a mould;
2, placing the fiber prefabricated part on the demolding cloth, and enabling one end of the flow guide cloth to be 40mm away from the fiber edge;
3, laying the processed core material on the prefabricated member, wherein the width of a groove drainage groove is 1mm, the depth of the groove drainage groove is 5mm, the groove interval is 60mm, the width of a main groove is 3mm, the depth of the main groove is 5mm, the main groove interval is 500mm, the aperture is 1mm, and the hole interval is 60 mm;
4 laying the fiber preform on the foam core
5, sequentially placing the demolding cloth and the flow guide cloth on the fiber in the same laying method as 1;
6 sealing the die cavity by adopting a vacuum bag and sealant;
7, vacuumizing the mould, and injecting the mixed resin system into the mould cavity through an RTM (resin transfer molding) injection machine when the vacuum pressure is less than 0.09 MPa; when the resin filling is finished and the fibers are fully soaked, continuously vacuumizing for 10min, and sealing the glue injection and vacuum tube;
8, curing at 120 ℃ for 4h and at 140 ℃ for 2h, and then demolding.
The properties of the article in this example are as follows:
Claims (5)
1. the auxiliary board suitable for vacuum introduction is characterized in that the lower surface of the auxiliary board is provided with a layer of metal foil, the lower surface of the auxiliary board is connected with fibers, and the upper surface of the auxiliary board is provided with grooves and micropores for resin flow guiding.
2. An auxiliary plate for vacuum infusion as claimed in claim 1, wherein said auxiliary plate is made of an elastomer, is repeatedly bendable without damage, and is peelable from resin.
3. An auxiliary plate for vacuum infusion as claimed in claim wherein a further layer of absorbent wadding is applied over the auxiliary plate to absorb excess resin.
4. An auxiliary plate for vacuum infusion as claimed in claim, wherein said auxiliary plate has grooves with a width of 1-3mm, a depth of 2-4mm, a pitch of 20-60mm, a diameter of 1-2mm, and a pitch of 20-40 mm.
5. An auxiliary plate for vacuum infusion as claimed in claim, wherein said auxiliary plate is selected from the group consisting of a silicone plate, a rubber plate, and a thermoplastic elastomer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911197128.0A CN110815868A (en) | 2019-11-29 | 2019-11-29 | Auxiliary plate suitable for vacuum introduction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911197128.0A CN110815868A (en) | 2019-11-29 | 2019-11-29 | Auxiliary plate suitable for vacuum introduction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110815868A true CN110815868A (en) | 2020-02-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911197128.0A Pending CN110815868A (en) | 2019-11-29 | 2019-11-29 | Auxiliary plate suitable for vacuum introduction |
Country Status (1)
| Country | Link |
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| CN (1) | CN110815868A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112659595A (en) * | 2020-12-17 | 2021-04-16 | 沈阳航天新光集团有限公司 | Device and method for removing solvent in carbon fiber polyimide composite bottle body in layered mode |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1761561A (en) * | 2003-03-13 | 2006-04-19 | 东邦泰纳克丝株式会社 | Method of resin transfer molding |
| US20130187314A1 (en) * | 2010-10-08 | 2013-07-25 | Gosakan Aravamudan | Manufacturing A Composite |
-
2019
- 2019-11-29 CN CN201911197128.0A patent/CN110815868A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1761561A (en) * | 2003-03-13 | 2006-04-19 | 东邦泰纳克丝株式会社 | Method of resin transfer molding |
| US20130187314A1 (en) * | 2010-10-08 | 2013-07-25 | Gosakan Aravamudan | Manufacturing A Composite |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112659595A (en) * | 2020-12-17 | 2021-04-16 | 沈阳航天新光集团有限公司 | Device and method for removing solvent in carbon fiber polyimide composite bottle body in layered mode |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200221 |
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| RJ01 | Rejection of invention patent application after publication |