CN114454516A - Simple method for preparing polyurethane composite glass fiber reinforced plastic by vacuum infusion process - Google Patents
Simple method for preparing polyurethane composite glass fiber reinforced plastic by vacuum infusion process Download PDFInfo
- Publication number
- CN114454516A CN114454516A CN202210029553.4A CN202210029553A CN114454516A CN 114454516 A CN114454516 A CN 114454516A CN 202210029553 A CN202210029553 A CN 202210029553A CN 114454516 A CN114454516 A CN 114454516A
- Authority
- CN
- China
- Prior art keywords
- fiber reinforced
- layer
- vacuum
- glass fiber
- reinforced material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- B29C70/36—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
-
- 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
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
- B29C70/22—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
- B29C70/224—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure the structure being a net
-
- 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
- B29C70/546—Measures for feeding or distributing the matrix material in the reinforcing structure
- B29C70/547—Measures for feeding or distributing the matrix material in the reinforcing structure using channels or porous distribution layers incorporated in or associated with the product
Abstract
The invention belongs to the technical field of composite glass fiber reinforced plastic manufacturing, and discloses a simple method for preparing polyurethane composite glass fiber reinforced plastic by using a vacuum infusion process, which comprises the following steps: a vacuum pressure sensitive adhesive tape is used to enclose an area on the heating platform and a release agent is smeared in the area. The invention keeps the inside of the area airtight by utilizing the close fit between the vacuum pressure-sensitive adhesive and the vacuum bag, the center of the demoulding cloth is sequentially paved with four layers of fiber reinforced materials, the top of the uppermost fiber material is paved with a layer of demoulding cloth, two covered ends of the demoulding cloth are respectively paved with a layer of flow guide net, each flow guide net is respectively provided with a layer of spirally cut polyethylene pipe and connected with the area of the PVC pipe extending out of the vacuum pressure-sensitive adhesive tape, and the PVC pipe is internally vacuumized from the outside and pumped into polyurethane by utilizing negative pressure, thereby effectively verifying the closed environment, also stably injecting the polyurethane, and preventing the bad phenomena of air leakage, blockage and no flow of resin, resin accumulation and bulge and the like.
Description
Technical Field
The invention belongs to the technical field of composite glass fiber reinforced plastic manufacturing, and particularly relates to a simple method for preparing polyurethane composite glass fiber reinforced plastic by using a vacuum infusion process.
Background
The vacuum infusion process is characterized in that resin is infused by vacuum force, resin sizing materials are infused through distributed flow guide pipes by utilizing the principle of air vacuum negative pressure, and a product structure layer is compacted by utilizing atmospheric pressure. The vacuum infusion forming process is to lay fiber reinforced material directly on the mold according to the structural design requirement, lay a layer of demolding cloth on the fiber reinforced material, the demolding cloth is usually a very thin fiber fabric with low porosity and low permeability, lay a flow guiding net on the demolding cloth, then cover with its vacuum bag, and seal.
The mould is coated and sealed by a vacuum bag film, the vacuum pump pumps air to a negative pressure state, the demoulding cloth is easy-to-strip low-porosity fiber fabric, the flow guide net is a medium with high permeability, and the flow guide pipes are distributed on the flow guide net. The resin enters the whole system through the rubber inlet pipe, the main direction of resin flow is guided through the guide pipe, the flow guide cloth enables the resin to be distributed to each corner of the laying layer, and the demolding cloth is peeled off after curing, so that the structural laying layer with high compactness and low gel content is obtained.
However, the vacuum infusion process has many disadvantages, such as air leakage during the infusion process, blocked and non-flowing resin, resin accumulation and swelling, etc., but the above disadvantages can be minimized or avoided in the process details and the actual operation of the personnel. However, in the preliminary verification and test stage of the material, only a composite material with only a few layers of fibers, particularly a polyurethane material, needs to be manufactured, which has high requirements on environment and process, and a simple vacuum infusion method is needed at this time
Disclosure of Invention
The invention aims to provide a simple method for preparing polyurethane composite glass fiber reinforced plastic by using a vacuum infusion process, so as to solve the problems in the background technology.
In order to achieve the above purpose, the invention provides the following technical scheme: a simple method for preparing polyurethane composite glass fiber reinforced plastic by using a vacuum infusion process comprises the following steps:
s1: using a vacuum non-setting adhesive tape to enclose an area on a heating platform, coating a release agent in the area, then laying a layer of release cloth, laying four layers of fiber reinforced materials in sequence in the center of the release cloth, laying a layer of release cloth on the top of the fiber reinforced material at the top, laying a layer of flow guide net on two ends of the covered material, arranging a layer of spirally cut polyethylene pipe on each flow guide net, connecting a PVC pipe with the area extending out of the vacuum non-setting adhesive tape, and keeping the area between the vacuum bag and the vacuum non-setting adhesive tape sealed and airtight;
s2: sealing the glue inlet, connecting the vacuumizing port with a vacuum pump, controlling the heating table to heat, keeping the vacuum pressure at-0.1 Mpa, covering a layer of heat-preservation quilt on the surface, and continuously operating for two hours;
s3: adjusting the temperature of the heating table to 30 ℃, inserting the glue inlet into defoamed polyurethane, opening the glue inlet until the glass fiber is completely soaked, and closing the glue inlet and the vacuum pump;
s4: and after the glue injection is finished, heating and curing, and demolding to obtain the polyurethane glass fiber reinforced plastic.
Preferably, the heating platform is an electrically heated tempered glass platform.
Preferably, the release fabric is a polyester release fabric.
Preferably, the fiber reinforced material is a glass fiber specially used for uniaxial polyurethane.
Preferably, the width of the first layer of fiber reinforced material is 2cm greater than the width of the second, third and fourth layers of fiber reinforced material, the fiber directions of the first and third layers of fiber reinforced material are the same, the fiber directions of the second and fourth layers of fiber reinforced material are the same, the fiber directions of the first and third layers of fiber reinforced material and the fiber directions of the second and fourth layers of fiber reinforced material form an included angle of 90 degrees, and three sides of the four layers of fiber reinforced material are aligned.
Preferably, the flow guide net is overlapped on the protruding surface of the first layer of fiber reinforced material, and the other flow guide net is overlapped on the fourth layer of fiber reinforced material on the opposite side.
Preferably, in the step S2, the temperature of the heating stage is controlled to be 50-100 ℃ during the vacuum pumping.
Preferably, in the step S2, the temperature of the heating stage is preferably 70 ℃.
Preferably, the viscosity of the polyurethane foam-removed in S3 is 40cp or less.
The invention has the following beneficial effects:
according to the invention, a region is defined on the heating platform by adopting the vacuum adhesive tape, the inside of the region is kept airtight by utilizing the close adhesion between the vacuum adhesive tape and the vacuum bag, four layers of fiber reinforced materials are sequentially paved in the center of the demolding cloth, a layer of demolding cloth is paved on the top of the uppermost fiber material, two ends covered by the demolding cloth are respectively paved with a layer of flow guide net, each flow guide net is respectively provided with a layer of spirally cut polyethylene pipe and connected with the region of the PVC pipe extending out of the vacuum adhesive tape, and the outside is internally vacuumized to draw in polyurethane by utilizing negative pressure, so that the polyurethane can be stably injected on the basis of a closed environment, and the adverse phenomena of air leakage, blockage and no flow of resin, resin accumulation and swelling and the like are prevented.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention.
In the figure: 1. a heating platform; 2. demolding the cloth; 3. a flow guide net; 4. vacuum bag; 5. a fibrous reinforcing material; 6. a glue injection pipe; 7. an air exhaust pipe; 8. a vacuum self-adhesive tape.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, in the embodiment of the present invention, a simple method for preparing a polyurethane composite glass fiber reinforced plastic by using a vacuum infusion process specifically includes the following steps:
firstly, a 70 cm-70 cm area is surrounded on a heating platform 1 by using a vacuum self-adhesive tape 8, a mold release agent is coated in the area, then a 60 cm-sized release cloth 2 is laid, a 44 cm-42 cm uniaxial glass fiber is laid at the center of the release cloth 2, a 42 cm-42 cm uniaxial glass fiber is laid, the fiber direction forms an included angle of 90 degrees with a first piece, three sides of the two uniaxial glass fibers are aligned, the first uniaxial glass fiber protrudes by 2cm, a third piece is the same as the first uniaxial glass fiber, a fourth piece is the same as a second piece, three sides of the four pieces of fibers are aligned, a 60 cm-sized release cloth 2 is laid on the uniaxial glass fiber, a 42 cm-12 cm diversion net 3 is lapped on the protruding part of the first uniaxial glass fiber, and a diversion net 3 with the same size is lapped on the other end, a spirally cut guide pipe is respectively placed on each flow guide net 3, one end of each guide pipe is connected with a PVC pipe and extends to the area outside the vacuum non-setting adhesive tape 8, the two guide pipes are respectively used as an adhesive injection pipe 6 and an exhaust pipe 7, a vacuum bag 4 is laid to cover the area of the vacuum non-setting adhesive tape 8, the vacuum non-setting adhesive tape is tightly attached to the area of the vacuum non-setting adhesive tape and cannot leak air, and the steps of vacuumizing, dehumidifying and glue filling are carried out;
Step 2; setting the temperature of the heating platform 1 to 30 ℃, inserting the glue inlet into the polyurethane which is completely defoamed, opening the glue inlet until the glass fiber is completely soaked, closing the glue inlet and the vacuum pumping port, and heating, curing and demolding after glue injection to obtain the polyurethane glass fiber reinforced plastic.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A simple method for preparing polyurethane composite glass fiber reinforced plastic by using a vacuum infusion process is characterized by comprising the following steps of: the method comprises the following steps:
s1: using a vacuum non-setting adhesive tape to enclose an area on a heating platform, coating a release agent in the area, then laying a layer of release cloth, laying four layers of fiber reinforced materials in sequence in the center of the release cloth, laying a layer of release cloth on the top of the fiber reinforced material at the top, laying a layer of flow guide net on two ends of the covered material, arranging a layer of spirally cut flow guide pipe on each flow guide net, connecting a PVC pipe to the area extending out of the vacuum non-setting adhesive tape, and keeping the area between the vacuum bag and the vacuum non-setting adhesive tape sealed and airtight;
s2: sealing the glue inlet, connecting the vacuumizing port with a vacuum pump, controlling the heating table to heat, keeping the vacuum pressure at-0.1 Mpa, covering a layer of heat-preservation quilt on the surface, and continuously operating for two hours;
s3: adjusting the temperature of the heating table to 30 ℃, inserting the glue inlet into defoamed polyurethane, opening the glue inlet until the glass fiber is completely soaked, and closing the glue inlet and the vacuum pump;
s4: and after the glue injection is finished, heating and curing, and demolding to obtain the polyurethane glass fiber reinforced plastic.
2. The simple method for preparing the polyurethane composite glass fiber reinforced plastic by the vacuum infusion process according to claim 1, wherein the method comprises the following steps: the heating platform is preferably an electrically heated tempered glass platform.
3. The simple method for preparing the polyurethane composite glass fiber reinforced plastic by the vacuum infusion process according to claim 1, wherein the method comprises the following steps: the release cloth is preferably polyester release cloth.
4. The simple method for preparing the polyurethane composite glass fiber reinforced plastic by the vacuum infusion process according to claim 1, wherein the method comprises the following steps: the fiber reinforced material is a special glass fiber for uniaxial polyurethane.
5. The simple method for preparing the polyurethane composite glass fiber reinforced plastic by the vacuum infusion process according to claim 1, wherein the method comprises the following steps: the width of the first layer of fiber reinforced material is 2cm larger than the width of the second layer of fiber reinforced material, the width of the third layer of fiber reinforced material and the width of the fourth layer of fiber reinforced material, the fiber directions of the first layer of fiber reinforced material and the third layer of fiber reinforced material are the same, the fiber directions of the second layer of fiber reinforced material and the fourth layer of fiber reinforced material are the same, the included angles of 90 degrees are formed between the directions of the first layer of fiber reinforced material and the third layer of fiber reinforced material and between the directions of the second layer of fiber reinforced material and the fourth layer of fiber reinforced material, and three sides of the fiber reinforced materials are aligned.
6. The simple method for preparing the polyurethane composite glass fiber reinforced plastic by the vacuum infusion process according to claim 1, wherein the method comprises the following steps: the flow guide net is overlapped on the protruding surface of the first layer of fiber reinforced material, and the other flow guide net is overlapped on the fourth layer of fiber reinforced material on the opposite side.
7. The simple method for preparing the polyurethane composite glass fiber reinforced plastic by the vacuum infusion process according to claim 1, wherein the method comprises the following steps: in the step S2, the temperature of the heating table is controlled to be 50-100 ℃ during the vacuum pumping.
8. The simple method for preparing the polyurethane composite glass fiber reinforced plastic by the vacuum infusion process as claimed in claim 7, wherein the simple method comprises the following steps: in S2, the temperature of the heating stage is preferably 70 ℃.
9. The simple method for preparing the polyurethane composite glass fiber reinforced plastic by the vacuum infusion process according to claim 1, wherein the method comprises the following steps: the viscosity of the polyurethane after defoaming in the step S3 is less than 40 cp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210029553.4A CN114454516A (en) | 2022-01-12 | 2022-01-12 | Simple method for preparing polyurethane composite glass fiber reinforced plastic by vacuum infusion process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210029553.4A CN114454516A (en) | 2022-01-12 | 2022-01-12 | Simple method for preparing polyurethane composite glass fiber reinforced plastic by vacuum infusion process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114454516A true CN114454516A (en) | 2022-05-10 |
Family
ID=81409755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210029553.4A Pending CN114454516A (en) | 2022-01-12 | 2022-01-12 | Simple method for preparing polyurethane composite glass fiber reinforced plastic by vacuum infusion process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114454516A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115626997A (en) * | 2022-10-25 | 2023-01-20 | 四川东树新材料有限公司 | Preparation method of polyurethane-based composite material |
-
2022
- 2022-01-12 CN CN202210029553.4A patent/CN114454516A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115626997A (en) * | 2022-10-25 | 2023-01-20 | 四川东树新材料有限公司 | Preparation method of polyurethane-based composite material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20050126699A1 (en) | Process for the manufacture of composite structures | |
| JP5252433B2 (en) | Bulk resin injection system apparatus and method | |
| CN109203515B (en) | Wind power blade and manufacturing method thereof | |
| US10751956B2 (en) | Method for manufacturing fiber-reinforced plastic products | |
| US5576030A (en) | Apparatus for fabricating composite parts | |
| EP1595688B1 (en) | Molded laminate and manufacturing method thereof | |
| CA2453411A1 (en) | Apparatus for making composite structures and method of making same | |
| CN103252897B (en) | A kind of vacuum perfusion process and for its mozzle | |
| CN114454516A (en) | Simple method for preparing polyurethane composite glass fiber reinforced plastic by vacuum infusion process | |
| CN104385628B (en) | A kind of vacuum diversion method preparing novel carbon fiber aircushion vehicle | |
| US20140027957A1 (en) | Device for manufacturing a composite part including a bell and associated method | |
| CN110053277A (en) | A kind of injection moulding method of foam layer radome component | |
| US10052826B2 (en) | Bulk resin infusion | |
| CN110884167B (en) | Polyurethane resin pouring structure and forming method for wind power generation blade | |
| CN108045002A (en) | A kind of honeycomb sandwich construction and preparation method thereof | |
| CN111531919A (en) | Resin vacuum forming device and component preparation method | |
| JP4806866B2 (en) | Vacuum RTM molding method | |
| CN109571991A (en) | The method for preparing wind electricity blade girder using different materials | |
| CN104129082B (en) | For the vacuum diaphragm of the perforation of fiber reinforced laminate | |
| US20190047236A1 (en) | Design and fabrication of a multilayer three-dimensional composite membrane | |
| JP2005271248A (en) | Frp manufacturing method | |
| CN105140326B (en) | A kind of structural member with photovoltaic module and preparation method thereof | |
| RU2579380C2 (en) | Method of moulding components from polymer composite materials with application of double vacuum pack | |
| CN110435183B (en) | Integral forming method for glass fiber reinforced plastic double-layer flange | |
| CN212446424U (en) | Resin vacuum forming device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |