CN215397351U - Composite material structure for vacuum infusion molding - Google Patents
Composite material structure for vacuum infusion molding Download PDFInfo
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- CN215397351U CN215397351U CN202121117990.9U CN202121117990U CN215397351U CN 215397351 U CN215397351 U CN 215397351U CN 202121117990 U CN202121117990 U CN 202121117990U CN 215397351 U CN215397351 U CN 215397351U
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Abstract
The utility model provides a composite material structure for vacuum infusion molding, which sequentially comprises a one-way breathable cloth, a first adhesive layer, a flow guide net, a second adhesive layer, an isolating membrane, a third adhesive layer and a peelable cloth from top to bottom; the structure of the unidirectional breathable cloth comprises an upper layer and a lower layer; the upper layer material of the one-way breathable cloth is selected from any one of PA6, PA66 or PET; the specifications of the upper layer material of the unidirectional breathable cloth are 100-250D and 36-72 f; the lower layer of the unidirectional breathable cloth is made of PU; the first adhesive layer is arranged on one side of the lower layer close to the one-way breathable cloth. The composite material structure for vacuum infusion molding can be laid at one time and is beneficial to vacuumizing in the using process, so that the time is saved, the human resource cost is reduced, and the production efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of composite materials, and relates to a composite material structure for vacuum infusion molding.
Background
The composite material part is widely applied to the fields of aerospace, wind power generation and the like, vacuum infusion molding is an important process of composite material production, laying of auxiliary materials for vacuum infusion molding is also an important technological process in the composite material production process, in order to ensure that the surface of the composite material part is smooth and appropriate in roughness, demolding cloth or strippable cloth needs to be laid above fiber cloth, and an isolation film, a flow guide net, one-way breathable cloth, a vacuum bag film and the like need to be laid above the strippable cloth. The vacuum auxiliary materials need to be paved and adhered layer by layer and cut, which causes serious waste of human resources.
CN207954710U discloses a water conservancy diversion net barrier film drawing of patterns cloth combined material structure that punches, the water conservancy diversion net sets up in the top, and water conservancy diversion net lower part is equipped with first gluing agent layer, and the barrier film that punches sets up in first gluing agent layer lower part, and the barrier film lower part that punches is equipped with second gluing agent layer, and drawing of patterns cloth sets up in second gluing agent layer lower part, and the thickness that water conservancy diversion net and/or punch between barrier film and/or the drawing of patterns cloth is the same or different, and the barrier film surface evenly distributed that punches has a plurality of bleeder vents. The utility model discloses a water conservancy diversion net barrier film drawing of patterns cloth combined material structure that punches can be used to the vacuum and fills the forming process, satisfies the user demand, has practiced thrift manpower and materials, simple structure, convenient to use, and the practicality is stronger. However, when the composite material structure of the utility model is applied to a vacuum infusion molding process, an airtight material is additionally used for vacuum pumping.
Therefore, in the art, it is desirable to develop a composite structure for vacuum infusion molding that can satisfy both one-time laying and vacuum pumping.
SUMMERY OF THE UTILITY MODEL
In view of the defects of the prior art, the utility model aims to provide a composite material structure for vacuum infusion molding. The composite material structure for vacuum infusion forming can be laid at one time and is beneficial to vacuumizing in the using process, so that the complicated laying time in the vacuum infusion forming process is saved, the human resource cost is reduced, the production efficiency is improved, and meanwhile, the composite material structure for vacuum infusion forming is convenient and flexible to use and has strong practicability.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a composite material structure for vacuum infusion molding, which sequentially comprises a one-way breathable cloth, a first adhesive layer, a flow guide net, a second adhesive layer, an isolating membrane, a third adhesive layer and a peelable cloth from top to bottom;
the structure of the unidirectional breathable cloth comprises an upper layer and a lower layer;
the upper layer material of the one-way breathable cloth is selected from any one of PA6, PA66 or PET;
the specifications of the upper layer material of the unidirectional breathable cloth are 100-250D and 36-72 f;
the lower layer of the unidirectional breathable cloth is made of PU;
the first adhesive layer is arranged on one side of the lower layer close to the one-way breathable cloth.
The one-way breathable cloth has the one-way breathable glue-impermeable effect, and when the composite material structure for vacuum infusion molding is used in a vacuum infusion molding process, the one-way breathability of the one-way breathable cloth enables gas in internal raw materials to be discharged, and gas in the outside cannot enter, so that vacuumizing is facilitated; the flow guide net has a flow guide effect, the isolation film has the effect of easily isolating and demoulding after resin is cured, and the peelable cloth has the effect of keeping the smoothness of the surface of a material after the resin is cured.
In a preferred embodiment of the present invention, the basic weave of the unidirectional air-permeable fabric is a plain weave or a basket weave.
In a preferred embodiment of the present invention, the material of the flow guide net is selected from any one of PE, PP, PA and PET, and the gram weight of the flow guide net is 50 to 200g/m2For example 50g/m2、80g/m2、100g/m2、120g/m2、150g/m2、180g/m2Or 200g/m2And the like.
In a preferred embodiment of the present invention, the tissue of the drainage net is a warp-flat tissue.
In a preferred embodiment of the present invention, the material of the barrier film is selected from PP or PE.
As a preferable technical scheme of the utility model, the surface of the isolation membrane is provided with air holes with uniform pore diameters, and the pore diameters of the air holes are 200-600 μm, such as 200 μm, 300 μm, 400 μm, 500 μm or 600 μm.
In a preferred embodiment of the present invention, the peelable cloth is made of one material selected from the group consisting of PA6, PA66, and PET.
In a preferred embodiment of the present invention, the weave of the peelable fabric is a plain weave or a basket weave.
In a preferred embodiment of the present invention, the first adhesive layer, the second adhesive layer, and the third adhesive layer are independently a polyacrylate glue layer or an ethylene-vinyl acetate copolymer glue layer.
As a preferable embodiment of the present invention, the sizing amounts of the first adhesive layer, the second adhesive layer and the third adhesive layer are independently 3 to 8g/m2E.g. 3g/m2、4g/m2、5g/m2、6g/m2、7g/m2Or 8g/m2And the like.
In the present invention, there is no particular limitation on the method for preparing the composite material structure for vacuum infusion molding, and, for example, the following method may be employed:
(1) applying glue on the PU material layer of the one-way breathable cloth by adopting a patterned roller, wherein the glue applying amount is 3-8g/m2Then compounding with a flow guide net, and overheating with a press roll at 40-60 deg.C and 0.3-0.5kg/cm2The speed is 2-5m/min, and a semi-finished product 1 is obtained;
(2) applying glue on the surface of the diversion net of the semi-finished product 1 away from the one-way breathable cloth by using a patterned roller, wherein the glue applying amount is 3-8g/m2Then compounding with isolating film, hot pressing at 40-60 deg.C and 0.3-0.5kg/cm2The speed is 2-5m/min, and a semi-finished product 2 is obtained;
(3) applying glue to any surface of the strippable cloth by a patterned roller, wherein the glue applying amount is 3-8g/m2Then compounding with the semi-finished product 2, and overheating the press roll at 40-60 deg.C under 0.2-0.4kg/cm2And the speed is 2-5m/min, and the composite material structure for vacuum infusion molding is obtained.
Wherein the mesh number of the pattern roller is 10-50 meshes/cm2。
In the preparation method of the composite material structure for vacuum infusion molding, the steps (1), (2) and (3) are a coherent production line, so that the time can be saved and the production cost can be reduced.
Compared with the prior art, the utility model has the following beneficial effects:
the unidirectional breathable cloth in the composite material structure for vacuum infusion molding can be laid at one time and is beneficial to vacuumizing when applied to a vacuum infusion molding process, so that the complicated laying time in the vacuum infusion molding process is saved, the human resource cost is reduced, the production efficiency is improved, and meanwhile, the unidirectional breathable cloth is convenient and flexible to use and has strong practicability.
Drawings
Fig. 1 is a schematic structural diagram of a composite material structure for vacuum infusion molding according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method for manufacturing a composite structure for vacuum infusion molding according to an embodiment of the present invention;
wherein, 1 is one-way breathable cloth, 2 is a flow guide net, 3 is an isolating film, 4 is peelable cloth, 5 is a first adhesive layer, 6 is a second adhesive layer, and 7 is a third adhesive layer.
Detailed Description
The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings. It should be understood by those skilled in the art that the specific embodiments are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
In this embodiment, a schematic structural diagram of a composite material structure for vacuum infusion molding is shown in fig. 1, and the composite material structure for vacuum infusion molding sequentially includes, from top to bottom, a unidirectional air-permeable cloth 1, a first adhesive layer 5, a flow guide net 2, a second adhesive layer 6, a separation film 3, a third adhesive layer 7, and a peelable cloth 4.
The structure of the unidirectional breathable cloth comprises an upper layer and a lower layer, wherein the upper layer is made of PA6 with the specification of 200D and 50f, and the lower layer is made of PU; the first adhesive layer is arranged on one side of the lower layer close to the one-way breathable cloth; the basic weave of the unidirectional breathable cloth is a plain weave; the material of the flow guide net is PP, and the gram weight is 200g/m2The structure of the flow guide net is a warp-flat structure; the isolation membrane is made of PP (polypropylene), and the surface of the isolation membrane is provided with air holes with uniform apertures, and the apertures of the air holes are 400 mu m; the material of the strippable cloth is PA6, and the weave of the strippable cloth is plain weave; the first adhesive layer, the second adhesive layer and the third adhesive layer are polyacrylate glue layers; the gluing amount of the first adhesive layer, the second adhesive layer and the third adhesive layer is 5g/m2。
In this embodiment, the preparation method of the composite material structure for vacuum infusion molding includes:
(1) applying adhesive on PU material layer of one-way air-permeable cloth by using pattern roller, then compounding with flow guide net, overheating press roller, temperature is 50 deg.C, pressure is 0.4kg/cm2The speed is 3m/min, and a semi-finished product 1 is obtained;
(2) applying adhesive on the surface of the flow guide net of the semi-finished product 1 far away from the one-way breathable cloth by using a patterned roller, then compounding the adhesive with an isolating film, and overheating a press roller at the temperature of 50 ℃ and the pressure of 0.4kg/cm2The speed is 3m/min, and a semi-finished product 2 is obtained;
(3) applying adhesive on any surface of the strippable cloth by a patterned roller, compounding with the semi-finished product 2, and overheating at 50 deg.C under 0.3kg/cm2And the speed is 4m/min, and the composite material structure for vacuum infusion molding is obtained.
Wherein the mesh number of the pattern roller is 30 meshes/cm2。
Example 2
The difference from the embodiment 1 is that the specification of the material of the upper layer of the unidirectional breathable cloth in the composite material structure for vacuum infusion molding provided by the embodiment is 250D and 72 f; the isolation membrane is made of PE, the surface of the isolation membrane is provided with air holes with uniform apertures, and the apertures of the air holes are 600 microns; the first adhesive layer, the second adhesive layer and the third adhesive layer are respectively an ethylene-vinyl acetate copolymer glue layer, a polyacrylate glue layer and an ethylene-vinyl acetate copolymer glue layer; the gluing amount of the first adhesive layer, the second adhesive layer and the third adhesive layer is 8g/m2. Other conditions were the same as in example 1.
Example 3
The difference from the embodiment 1 is that the upper layer of the unidirectional air-permeable cloth in the composite material structure for vacuum infusion molding provided by the embodiment is made of PA66, and the specifications are 100D and 36 f; the gram weight of the flow guide net is 100g/m2The aperture of the air holes on the surface of the isolating membrane is 200 mu m; the gluing amount of the first adhesive layer, the second adhesive layer and the third adhesive layer is 3g/m2. Other conditions were the same as in example 1.
Example 4
The difference from embodiment 1 is that the gluing amounts of the first adhesive layer, the second adhesive layer and the third adhesive layer in the composite material structure for vacuum infusion molding provided by the embodiment are respectively 4g/m2、5g/m2、6g/m2. Other conditions were the same as in example 1.
Example 5
The difference from the embodiment 1 is that the pore diameter of the air-permeable pores on the surface of the isolation membrane in the composite material structure for vacuum infusion molding provided by the embodiment is 300 μm. Other conditions were the same as in example 1.
Example 6
The difference from the embodiment 1 is that the specification of the material of the upper layer of the unidirectional air-permeable cloth in the composite material structure for vacuum infusion molding provided by the embodiment is 150D and 45 f. Other conditions were the same as in example 1.
Comparative example 1
The only difference from example 1 is that the composite structure for vacuum infusion molding provided by this comparative example does not include a one-way permeable cloth and a first adhesive layer. Other conditions were the same as in example 1.
Comparative example 2
The difference from example 1 is only that the first adhesive layer, the second adhesive layer and the third adhesive layer in the composite material structure for vacuum infusion molding provided by the comparative example have the gluing amount of 2g/m2. Other conditions were the same as in example 1.
Comparative example 3
The difference from example 1 is only that the first adhesive layer, the second adhesive layer and the third adhesive layer in the composite material structure for vacuum infusion molding provided by the comparative example have the gluing amount of 9g/m2. Other conditions were the same as in example 1.
The composite structures for vacuum infusion molding prepared in examples 1 to 6 and comparative examples 1 to 3 were subjected to a performance test according to the following method:
(1) and (3) testing the surface stripping performance of the workpiece: cleaning a 1000X 1000mm platform, laying a layer of 800X 800mm demoulding cloth in the middle, applying a sealing adhesive tape around the demoulding cloth, laying 10 layers of 600X 600mm glass fiber cloth above the demoulding cloth, laying 800X 800mm composite material structure for vacuum infusion molding above the glass fiber cloth, with the strippable cloth facing downwards, then applying a vacuum bag, and vacuumizing. Preparing 5kg of epoxy resin, adding a curing agent, adding a small amount of coloring agent, after resin glue solution is uniformly mixed, performing vacuum infusion, after the infusion is completed, heating the platform to 70 ℃, curing for 8 hours, after the curing is completed, checking whether a composite material structure residue exists on the surface of a workpiece, checking whether the surface of the workpiece has defects, and checking whether the upper surface of the composite material structure has color;
(2) and (3) testing the perfusion time: placing a demoulding cloth, 10 layers of glass fiber cloth, a composite material structure for vacuum infusion molding and a vacuum bag film on a platform of 1000mm multiplied by 1000mm, then carrying out resin infusion, and recording the infusion time.
Remarking: the workpiece in the test method refers to a composite material workpiece formed after the resin glue solution is cured.
The results of the performance tests are shown in table 1.
TABLE 1
As can be seen from table 1, the composite material structure for vacuum infusion molding prepared in the embodiment of the present invention has no significant effect on the surface of the part, and can shorten the vacuum bag manufacturing time and reduce the labor cost.
Compared with example 1, the composite material structure for vacuum infusion molding of comparative example 1 does not include the unidirectional air-permeable cloth, and when the composite material structure is used for vacuum infusion molding, resin overflows to cause waste, and defects are caused on the surface of a product, so that in practical application, an additional unidirectional air-permeable cloth needs to be laid on the composite material structure of comparative example 1, and the additional unidirectional air-permeable cloth increases labor and time costs.
Compared with the example 1, the composite material structure for vacuum infusion molding of the comparative example 2 has uneven rolling, which is caused by uneven bonding and uneven rolling due to the fact that the gluing amount of the first adhesive layer, the second adhesive layer and the third adhesive layer in the comparative example 2 is small; when the composite structure for vacuum infusion molding of comparative example 3 is used for vacuum infusion molding, the infusion time is increased because the gluing amount of the first adhesive layer, the second adhesive layer, and the third adhesive layer is large in comparative example 3.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. The composite material structure for vacuum infusion molding is characterized by sequentially comprising one-way breathable cloth, a first adhesive layer, a flow guide net, a second adhesive layer, an isolating membrane, a third adhesive layer and peelable cloth from top to bottom;
the structure of the unidirectional breathable cloth comprises an upper layer and a lower layer;
the upper layer material of the one-way breathable cloth is selected from any one of PA6, PA66 or PET;
the specifications of the upper layer material of the unidirectional breathable cloth are 100-250D and 36-72 f;
the lower layer of the unidirectional breathable cloth is made of PU;
the first adhesive layer is arranged on one side of the lower layer close to the one-way breathable cloth.
2. The composite structure for vacuum infusion molding according to claim 1, wherein the basic weave of the unidirectional air-permeable cloth is a plain weave or a basket weave.
3. The composite material structure for vacuum infusion molding according to claim 1, wherein the material of the flow guide net is selected from any one of PE, PP, PA and PET, and the gram weight of the flow guide net is 50-200 g/m2。
4. The composite structure for vacuum infusion molding according to claim 1 or 3, wherein the structure of the flow guide net is a warp-flat structure.
5. The composite structure for vacuum infusion molding according to claim 1, wherein the material of the isolation film is selected from PP or PE.
6. The composite material structure for vacuum infusion molding according to claim 1 or 5, wherein the surface of the isolation membrane has air holes with uniform pore size, and the pore size of the air holes is 200-600 μm.
7. The composite structure for vacuum infusion molding according to claim 1, wherein the peelable cloth is made of one material selected from the group consisting of PA6, PA66 and PET.
8. The composite structure for vacuum infusion molding according to claim 1 or 7, wherein the weave of the peelable cloth is a plain weave or a basket weave.
9. The composite structure for vacuum infusion molding according to claim 1, wherein the first adhesive layer, the second adhesive layer, and the third adhesive layer are independently a polyacrylate glue layer or an ethylene-vinyl acetate copolymer glue layer.
10. The composite structure for vacuum infusion molding according to claim 1 or 9, wherein the first adhesive layer, the second adhesive layer, and the third adhesive layer independently have a sizing amount of 3 to 8g/m2。
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121117990.9U CN215397351U (en) | 2021-05-24 | 2021-05-24 | Composite material structure for vacuum infusion molding |
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| CN202121117990.9U CN215397351U (en) | 2021-05-24 | 2021-05-24 | Composite material structure for vacuum infusion molding |
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