TWI447025B - Method for manufacturing fiber reinforced products with bonding mechanism - Google Patents

Description

Method for manufacturing fiber reinforced product with bonding mechanism

The present invention relates to a method for producing a fiber-reinforced product, and more particularly to a method for producing a fiber-reinforced product having a bonding mechanism.

With the improvement of industrial technology and living standards, people's requirements for various products are getting higher and higher, not only requiring cheap and practical, but also further requiring beautiful, light weight, long service life and other functions.

Therefore, in recent years, there have been more and more products made of high-strength and light-weight fiber-reinforced materials in daily life, among which carbon fiber-reinforced materials are the most common, but it is well known that carbon fiber composites are mostly hot. It is formed by pressing, so it is often used to manufacture products with uniform cross-section such as plate, tube or column. If you want to form a product with more complicated features, it is often necessary to form separately and then manually. Mechanical forces (eg, pins, rivets, screws, etc.) or adhesives are combined with each other, which results in poor dimensional accuracy and time-consuming labor.

In order to improve the above-mentioned shortcomings, the related art has developed, as disclosed in Japanese Patent No. 2010-046939, "Manufacturing Method of One-Piece Finished Product", mainly by placing a fiber-reinforced composite material sheet containing a thermoplastic resin and having a tapered end portion in a mold. The attachment member is injection molded on the fiber reinforced composite material sheet by a shot forming technique.

However, the thermoplastic resin is inferior in strength and rigidity, and the adhesion between the attachment member and the fiber-reinforced composite material sheet is insufficient, and it is liable to be broken or peeled due to an external force.

Accordingly, it is an object of the present invention to provide a method for producing a fiber-reinforced product having a bonding mechanism which has a relatively stable bonding force.

Therefore, the method for manufacturing a fiber-reinforced product having a bonding mechanism of the present invention comprises the following steps: (A) stacking a plurality of fiber-reinforced materials impregnated with a thermosetting resin and a thermosetting polymer film into a composite substrate, wherein the thermosetting property is high. The molecular film is made of a polyether or polyamine polymer material; (B) the composite substrate is placed in a hot pressing mold to be hot pressed into a half finished product, and the semifinished product comprises a high thermosetting property. An interposer formed by a molecular film, and a body formed in the interposer and formed of the fiber-reinforced material; (C) applying an adhesive on the interposer to form an adhesive layer; (D) The semi-finished product is placed in a molding die, and a thermoplastic polymer material is filled in the molding die by an injection molding technique to form a bonding mechanism that is combined with the adhesive layer.

The invention has the beneficial effects of: utilizing the interposer formed by the thermosetting polymer film to ensure the strength and rigidity of the body formed by the fiber reinforcing material, and the adhesive layer formed by the adhesive is provided. It not only improves the bonding force and stability between the semi-finished product and the bonding mechanism, but also effectively avoids the occurrence of cracking or peeling by external force.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.

Referring to Figures 1 and 2, a preferred embodiment of the method for producing a fiber-reinforced product having a bonding mechanism of the present invention, first, as shown in step 21, a plurality of fiber-reinforced materials 31 impregnated with a thermosetting resin and a thermosetting polymer film The sheets 32 are stacked to form a composite substrate 33, wherein the thermosetting polymer film 32 is made of a polymer material selected from the group consisting of polyethers or polyamides.

In the preferred embodiment, the fiber-reinforced material 31 impregnated with the thermosetting resin is a carbon fiber prepreg impregnated with an epoxy resin, and the thermosetting polymer film 32 is made of polyurethane (PU). .

Then, as shown in step 22, the composite substrate 33 is placed in a hot press mold 200 and heat-pressed into a semi-finished product 34. The semi-finished product 34 includes an interposer 341 formed of the thermosetting polymer film 32, and A body 342 formed in the interposer 341 and formed of the fiber reinforcement 31. The body 342 of the semi-finished product 34 has an opposite first surface 343 and a second surface 344, and a surrounding surface 345 surrounding the first surface 343 and the second surface 344. The interposer 341 is coated. The second surface 344 is adjacent to the surrounding surface 345.

It should be particularly noted that, in the preferred embodiment, the interposer 341 covers the second surface 344 and the surrounding surface 345. In practical applications, the design of the hot stamping die 200 can be transmitted, or The stacking manner of the thermosetting polymer film 32 and the fiber reinforcing material 31 is changed, and the interposer 341 is only coated on the surrounding surface 345, and the same effect can be achieved.

Then, as shown in step 23, an adhesive is applied to the interposer 341 of the semi-finished product 34 to form an adhesive layer 346. Finally, as shown in step 24, the semi-finished product 34 is placed in a molding die 201, and a thermoplastic polymer material is filled in the molding die 201 by an injection molding technique to form a bonding mechanism with the adhesive layer 346. 35, which in turn obtains a fiber reinforced product 36 having a bonding mechanism 35.

The thermosetting polymer film 32 and the fiber-reinforced material 31 are stacked as the composite substrate 33, and the semi-finished product 34 is hot-pressed to form the interposer 341 formed of the thermosetting polymer film 32. The body 342 formed of the fiber-reinforced material 31, the interposer 341 formed of the thermosetting polymer film 32 having better strength and rigidity than the thermoplastic resin, and the adhesive layer coated on the interposer 341 are indeed included. 346, in combination with the bonding mechanism 35 for injection molding of a thermoplastic polymer material, not only can improve the bonding force and stability between the bonding mechanism 35 and the semi-finished product 34, but also provide sufficient strength and rigidity to avoid the semi-finished product 34 and The bonding mechanism 35 is easily broken or peeled by an external force.

In summary, in the method for manufacturing a fiber-reinforced product having a bonding mechanism, the thermosetting polymer film 32 and the fiber-reinforced material 31 are stacked into the composite substrate 33, and hot-pressed into the semi-finished product 34. The interposer 341 formed of the thermosetting polymer film 32 can surely enclose the body 342 formed of the fiber-reinforced material 31 to provide sufficient strength and rigidity to form an adhesive layer 346 formed by an adhesive. Moreover, not only can the bonding force and stability between the semi-finished product 34 and the bonding mechanism 35 be improved, but also the fracture or peeling can be effectively prevented by the external force, so the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

twenty one. . . Stacking a majority of fiber-reinforced materials impregnated with thermosetting resin and a thermosetting polymer film into a composite substrate

twenty two. . . The composite substrate is hot pressed into a semi-finished product in a hot pressing mold, the semi-finished product comprises an interposer formed by the thermosetting polymer film, and one bit in the interposer and composed of the fiber reinforcing material Formed ontology

twenty three. . . Applying an adhesive to the interposer of the semi-finished product to form an adhesive layer

twenty four. . . The semi-finished product is placed in a molding die, and a thermoplastic polymer material is filled in the molding die by an injection molding technique to form a bonding mechanism combined with the adhesive layer.

200. . . Hot pressing mold

201. . . Molding mold

31. . . Fiber reinforced material

32. . . Thermosetting polymer membrane

33. . . Composite substrate

34. . . Semi finished product

341. . . Intermediary layer

342. . . Ontology

343. . . First surface

344. . . Second surface

345. . . Surrounding surface

346. . . Adhesive layer

35. . . Combined mechanism

36. . . Fiber reinforced products

1 is a flow chart showing a preferred embodiment of a method of manufacturing a fiber reinforced product having a bonding mechanism of the present invention;

Figure 2 is a schematic view of the assistance of Figure 1.

twenty one. . . Stacking a majority of fiber-reinforced materials impregnated with thermosetting resin and a thermosetting polymer film into a composite substrate

twenty two. . . The composite substrate is hot pressed into a semi-finished product in a hot pressing mold, the semi-finished product comprises an interposer formed by the thermosetting polymer film, and one bit in the interposer and composed of the fiber reinforcing material Formed ontology

twenty three. . . Applying an adhesive to the interposer of the semi-finished product to form an adhesive layer

twenty four. . . The semi-finished product is placed in a molding die, and a thermoplastic polymer material is filled in the molding die by an injection molding technique to form a bonding mechanism combined with the adhesive layer.

Claims (4)

A method for manufacturing a fiber-reinforced product having a bonding mechanism, comprising: (A) stacking a plurality of fiber-reinforced materials impregnated with a thermosetting resin and a thermosetting polymer film into a composite substrate, wherein the thermosetting polymer film is selected (B) the composite substrate is placed in a hot pressing mold and heat-pressed into a semi-finished product comprising a thermosetting polymer film formed by the thermosetting polymer film. An interposer, and a body formed in the interposer and formed of the fiber-reinforced material; (C) applying an adhesive on the interposer to form an adhesive layer; and (D) placing the semi-finished product in a molding In the mold, a thermoplastic polymer material is filled in the molding die by an injection molding technique to form a bonding mechanism that is bonded to the adhesive layer, thereby obtaining a fiber-reinforced product having a bonding mechanism. The method for manufacturing a fiber-reinforced product having a bonding mechanism according to the first aspect of the invention, wherein the body of the semi-finished product of the step (B) has an opposite first surface and a second surface, and a surrounding a surrounding surface of the surface and the periphery of the second surface, the interposer is covering the second surface and the surrounding surface. The method for manufacturing a fiber-reinforced product having a bonding mechanism according to the first aspect of the invention, wherein the body of the semi-finished product of the step (B) has an opposite first surface and a second surface, and a surrounding A surrounding surface of the surface and the periphery of the second surface, the interposer surrounding the surrounding surface. The method for producing a fiber-reinforced product having a bonding mechanism according to any one of claims 1 to 3, wherein the fiber-reinforced material impregnated with the thermosetting resin in the step (A) is impregnated with an epoxy resin. A carbon fiber prepreg, which is made of polyurethane.