CN117754886A - Method for preparing non-hole glass fiber composite material product - Google Patents
Method for preparing non-hole glass fiber composite material product Download PDFInfo
- Publication number
- CN117754886A CN117754886A CN202311608234.XA CN202311608234A CN117754886A CN 117754886 A CN117754886 A CN 117754886A CN 202311608234 A CN202311608234 A CN 202311608234A CN 117754886 A CN117754886 A CN 117754886A
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- China
- Prior art keywords
- glass fiber
- product
- fiber composite
- composite material
- prepreg layer
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- Pending
Links
- 239000003365 glass fiber Substances 0.000 title claims abstract description 70
- 239000002131 composite material Substances 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 11
- 229920005989 resin Polymers 0.000 claims abstract description 16
- 239000011347 resin Substances 0.000 claims abstract description 16
- 238000007731 hot pressing Methods 0.000 claims abstract description 12
- 238000007711 solidification Methods 0.000 claims abstract description 5
- 230000008023 solidification Effects 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 6
- 239000011152 fibreglass Substances 0.000 claims description 4
- 239000005373 porous glass Substances 0.000 claims description 4
- 239000003292 glue Substances 0.000 abstract description 7
- 239000004744 fabric Substances 0.000 description 8
- 238000000465 moulding Methods 0.000 description 5
- 238000012797 qualification Methods 0.000 description 4
- 101100491335 Caenorhabditis elegans mat-2 gene Proteins 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a method for preparing a hole-free glass fiber composite material product, which comprises the following steps: paving a plurality of layers of glass fiber prepregs on the die to form a glass fiber prepreg layer group; spreading a layer of glass fiber felt on the glass fiber prepreg layer group; and after the mold is closed, the overflowed resin is absorbed by using a glass fiber felt, and the glass fiber composite material product without holes is manufactured after hot pressing and solidification. The invention solves the problem that the glue shortage holes can occur when the glass fiber products are manufactured by using the mould for hot pressing.
Description
Technical Field
The invention relates to the technical field of composite material processing, in particular to a surface felt prepreg and a preparation method thereof.
Background
The existing molding process of the glass fiber composite material plate comprises the steps of paving glass fiber cloth in a pre-molding die, coating epoxy resin on the glass fiber cloth, soaking a glass fiber cloth roller, pressing into glass fiber prepreg, paving a plurality of layers of prepregs according to the thickness of a product, taking out a prepreg layer group from the pre-molding die, placing the prepreg layer group in the molding die, vacuumizing, performing hot pressing, discharging redundant bubbles in the resin, and heating and solidifying the resin to prepare the glass fiber plate product.
And as the mold at the edge part of the product cannot be fully compacted, the resin is extruded to flow out more, so that the adhesive is lacked; the fillet position of the product bending area is folded by the glass fiber cloth, so that the layering is thicker than the actual die gap, the resin at the position is extruded and flows out more, the problem of serious adhesive shortage occurs, holes can appear in the areas after the product is cooled, and the production qualification rate of the product is reduced. Accordingly, there is a need for a method of making a void-free fiberglass composite product.
Disclosure of Invention
The invention aims to provide a method for preparing a non-hole glass fiber composite material product, which solves the problems that holes and glue shortage are easy to occur on the surface of the product when a mold is used for manufacturing a glass fiber product in a hot pressing mode.
The technical scheme adopted for solving the technical problems is as follows:
a method for preparing a non-porous glass fiber composite product comprises the steps of;
paving a plurality of layers of glass fiber prepregs on the die to form a glass fiber prepreg layer group;
paving a layer of glass fiber felt on the glass fiber prepreg layer group;
and after the mold is closed, the overflowed resin is absorbed by using a glass fiber felt, and the glass fiber product without holes is manufactured after hot pressing and solidification.
Further, the glass fiber felt covers the outer wall of the glass fiber prepreg layer group.
Further, the gram weight of the glass fiber felt is 30-100 g/m < 2 >, and the thickness is 0.03-0.1 mm.
Further, the temperature of the hot pressing is 130-150 ℃.
The invention has the beneficial effects that: according to the invention, a layer of glass fiber felt with larger fiber density is paved on the glass fiber prepreg layer group, and then hot pressing, solidification and molding are carried out, so that the glass fiber felt can absorb part of overflowed resin in the hot pressing process, the problems of glue shortage and holes on the surface of a product can be effectively avoided, and the appearance, quality and production qualification rate of the glass fiber composite material plate product can be well ensured.
The invention will be described in more detail below with reference to the drawings and examples.
Drawings
FIG. 1 is a block diagram of a glass fiber product of the present invention.
Fig. 2 is an exploded view of a glass fiber mat laid on a glass fiber prepreg layer set in a mold.
Detailed Description
A method for preparing a non-porous glass fiber composite product comprises the steps of;
firstly, paving glass fiber cloth in a pre-forming die, uniformly coating epoxy resin on the glass fiber cloth, and soaking the glass fiber cloth to prepare glass fiber prepreg;
paving a plurality of layers of glass fiber prepregs on the forming die to form a glass fiber prepreg layer group 1;
and as shown in fig. 2, a layer of glass fiber felt 2 is laid on the glass fiber prepreg layer group 1;
and after the forming die is closed, the overflowed resin is absorbed by the glass fiber mat 2, and the glass fiber product without holes is manufactured after hot pressing and solidification.
Preferably, in combination with the above solution, the glass fiber mat covers the outer wall of the glass fiber prepreg layer group in order to absorb the resin overflowed from the glass fiber prepreg layer group.
Preferably, in combination with the scheme, in order to better prevent the problem of lack of glue of products by utilizing glass fiber felt with larger fiber density to adsorb overflowed resin, the gram weight of the glass fiber felt is 30-100 g/m 2 The thickness is 0.03-0.1 mm. The glass fibre mats having a grammage corresponding to the thickness, e.g. 30g/m 2 The thickness of the glass fiber felt is 0.03mm; for example 100g/m 2 The thickness of the glass fiber felt is 0.1m. The gram weight and the thickness of the glass fiber felt are too small to play a good resin adsorption effect, and the gram weight and the thickness of the glass fiber felt are too large to influence the overall thickness of the product.
Preferably, in combination with the above scheme, in order to ensure better curing and forming effects, the temperature of the mold for hot-pressing the glass fiber prepreg layer group and the glass fiber felt is 130-150 ℃.
As shown in fig. 1, the automobile glass fiber composite battery cover is box-shaped, and the edges of the fixed edges around the upper end of the automobile glass fiber composite battery cover cannot be fully pressed and compacted by a die, so that the resin is more extruded and flows out, and the problems of glue shortage and holes are easily caused; the bending fillet area is larger in thickness than the gap between the upper die and the lower die due to the folding problem of the glass fiber cloth, so that the problem that resin at the fillet area is extruded and flows out more to cause severe glue shortage is solved, holes are formed in the areas after the product is solidified, the appearance and quality of the product are affected, and the production qualification rate of the product is reduced. By the method, the glass fiber mat 2 with higher density is utilized to adsorb the resin overflowed from the glass fiber prepreg layer group 1, so that the problem of glue shortage holes in the area caused by serious resin loss is prevented, and the appearance, quality and production qualification rate of the product can be well ensured.
While the invention has been described above by way of example, it will be apparent that the invention is not limited to the above embodiments, but is capable of modification in various ways, or in other applications without modification, of the inventive concept and technical solution, all falling within the scope of the invention.
Claims (4)
1. A method for preparing a non-porous glass fiber composite product is characterized by comprising the following steps of;
paving a plurality of layers of glass fiber prepregs on the die to form a glass fiber prepreg layer group;
paving a layer of glass fiber felt on the glass fiber prepreg layer group;
and after the mold is closed, the overflowed resin is absorbed by using a glass fiber felt, and the glass fiber composite material product without holes is manufactured after hot pressing and solidification.
2. The method of making a void-free fiberglass composite product of claim 1, wherein the fiberglass mat covers the outer wall of the fiberglass prepreg layer set.
3. The method for producing a non-porous glass fiber composite product according to claim 1 or 2, wherein the glass fiber mat has a gram weight of 30 to 100g/m 2 The thickness is 0.03-0.1 mm.
4. The method of preparing a void-free glass fiber composite product of claim 1, wherein the hot pressing is at a temperature of 130 to 150 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311608234.XA CN117754886A (en) | 2023-11-29 | 2023-11-29 | Method for preparing non-hole glass fiber composite material product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311608234.XA CN117754886A (en) | 2023-11-29 | 2023-11-29 | Method for preparing non-hole glass fiber composite material product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117754886A true CN117754886A (en) | 2024-03-26 |
Family
ID=90320946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311608234.XA Pending CN117754886A (en) | 2023-11-29 | 2023-11-29 | Method for preparing non-hole glass fiber composite material product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117754886A (en) |
-
2023
- 2023-11-29 CN CN202311608234.XA patent/CN117754886A/en active Pending
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