CN104441592A - Method for molding fiber shell - Google Patents

Abstract

Disclosed is a method for molding a fiber shell. The three-dimensional fiber shell is formed by adhering at least a piece of hardened fiberboard as the upper layer to at least one thermoplastic sheet as a lower layer through heating and pressing. The fiberboard is a flat board formed by hardening the thermosetting resin through heating and pressing after at least one layer of fiber sheet is preimpregnated into the thermosetting resin, while the thermoplastic sheet is preferably at least one layer of fiber sheet preimpregnated by resin. Whereby, the thermoplastic sheet and the fiberboard are quickly combined together and the predetermined strength can be achieved.

Description

The forming method of fiber shell

Technical field

The present invention about a kind of forming method of fiber shell, espespecially a kind of can rapid shaping, a large amount of to manufacture, can make shaping after fiber shell there is enough intensity, and can effective loss of weight and reduce costs manufacturing process.

Background technology

Product casing common on the market at present; such as: 3C Product shell; be mostly with plastic cement or metal material one-body molded; after making a housing; again in modes such as spraying, printing or sputters; form a decorating film in the surface of housing, for the outer surface being socketed on 3C Product, make the function reaching protection.

In order to allow shaping after there is enough intensity, and weight reduction, also have and sheet metal and plastic cement be combined as a whole, to make the technology of product casing.But, utilize the product casing that aforesaid way is shaping, because metal is not identical with the material of both plastic cement, although can combine by the mode pasted, but therebetween in conjunction with strength built on the sand, easily after permanent use, the adhesion because of jelly weakens and is separated, and weight cannot significantly alleviate.

Further technology, also have with the fibre plate of several layers of pre-soaked resin overlapping, or resin is added in the fibre plate of several ply, heated, pressurize to make the mode of one hardened forming, it is owing to once adding resin in the fibre plate of several ply, and Fiber Materials is close or identical, therefore, can allow after each fibre plate hardens at the same time, allow fiber shell have enough intensity, and overcome the problem be separated because adhesion between unlike material weakens.

Summary of the invention

But, in the forming process of above-mentioned fiber shell, following point is still had to produce: 1. for overlapping and still unhardened for multi-disc fibre plate, time in gap between each fiber infiltrating each fibre plate when not having enough resins, because the overall clearance space between each fiber is too large, also the porosity namely in unit volume is too high, although is heated, pressurize to make sclerosis, still has the problem that intensity is not enough or surface hole defect is too many.2. in order to allow fiber shell have enough intensity, in forming process, namely need to utilize and to vacuumize or the mode of direct weighting allows resin slowly infiltrate because of pressurized among each overlapping fibre plate, thus, want the time of a shaping fiber shell, about need 10 ~ 90 minutes at present, its molding time is too of a specified duration, and the method for there is no meets demand that is a large amount of and that manufacture fast.

In view of this, in order to provide a kind of forming method being different from common technology, and improve above-mentioned shortcoming, inventor amasss experience for many years and constantly researches and develops improvement, then has generation of the present invention.

An object of the present invention provide a kind of can rapid shaping, to reach the forming method of the fiber shell of a large amount of manufacture demand.

An object of the present invention, providing a kind of molding mode breaking through traditional fibre shell, makes after rapid shaping, still can guarantee product strength, and can the forming method of the effective fiber shell of loss of weight.

In order to achieve the above object, the forming method of a kind of fiber shell set by the present invention, comprise the following steps: the fiberboard that a. provides at least a slice to harden and at least a slice heat can plastic sheet, wherein, this fiberboard is at least after one deck fibre plate preimpregnation thermosetting resin, through heating, pressurize that thermosetting resin is hardened after shaping flat board; And b. heat hot can plastic sheet and fiberboard, and upper and lower stacked heat can plastic sheet and fiberboard be placed in a mould, can plastic sheet and fiberboard make to be shaped to a dimensional fibre shell with pressurized heat.

During enforcement, the present invention more comprises a fiberboard forming step, is preimpregnation thermosetting resin on several fibre plate, is separated up and down by these fibre plates, then heat, pressurizeing makes thermosetting resin harden, with shaping several independent up and down and fiberboard hardened.

During enforcement, this heat can plastic sheet be the fibre plate of at least one deck pre-soaked resin.

During enforcement, the porosity of fiberboard is below 15%, and the thickness of fiberboard is at below 1mm.

For understanding the present invention further, below lifting preferred embodiment, coordinating accompanying drawing, figure number, concrete constitution content of the present invention and effect of reaching thereof are described in detail as follows.

Accompanying drawing explanation

Fig. 1 is the flow chart of steps of preferred embodiment of the present invention.

Fig. 2 is the three-dimensional appearance schematic diagram of the present invention when shaping a plurality of fiberboard.

Fig. 3 be heat of the present invention can plastic sheet and fiberboard upper and lower stacked with the generalized section be shaped to during fiber shell.

[symbol description]

Fiberboard 1 heat can plastic sheet 1 '

Dividing plate 2 mould 3

Viscose 4 fiber shell 5.

Detailed description of the invention

The present invention is a kind of forming method of fiber shell.Wherein, this fiber shell is defined as non-planar base, also, can form an accommodation space after formation, such as: this fiber shell comprises a rectangle base plate and at least two periphery by base plate to the side plate of downward-extension, use for as the shell of 3C Product or luggage case; This fiber shell also can be bent into the moulding of arc or other non-tablet after formation, such as: this fiber shell has arc-shaped curved surface, uses with the sports equipment of the vehicle component or skateboarding and so on as bonnet sheet metal component and so on.And this forming method comprises the following steps: the fiberboard that a. provides at least a slice to harden and at least a slice heat can plastic sheet, wherein, this fiberboard is at least after one deck fibre plate preimpregnation thermosetting resin, through heating, pressurize that thermosetting resin is hardened after shaping flat board; And b. heat hot can plastic sheet and fiberboard, and upper and lower stacked heat can plastic sheet and fiberboard be placed in a mould, can plastic sheet and fiberboard make to be shaped to a dimensional fibre shell with pressurized heat.

Refer to shown in Fig. 1, the preferred embodiment of its forming method 1 being this creation fiber shell is comprise the following steps:

A. the fiberboard providing at least a slice to harden and at least a slice heat of not yet hardening can plastic sheet, fiberboard is at least after one deck fibre plate preimpregnation thermosetting resin, through heating, pressurize to make thermosetting resin to harden after shaping flat board, heat plastic sheet can be the fibre plate of at least one deck pre-soaked resin;

B. heat hot can plastic sheet and fiberboard, and can plastic sheet and fiberboard be placed in a mould by upper and lower stacked heat, can plastic sheet and fiberboard make to be shaped to a dimensional fibre shell with pressurized heat.

Wherein, a fiberboard forming step is more comprised before step a, as shown in Figure 2, preimpregnation thermosetting resin on several fibre plate, these fibre plates are separated with dividing plate about 2, then heat, pressurizeing makes thermosetting resin harden, with shaping several independent up and down and fiberboard 1 hardened after cooling.During enforcement, these dividing plates 2 also can replace with barrier film or release liners respectively.

After above-mentioned fiberboard 1 is fibre plate pre-soaked resin, form after heating, pressurizeing to make hardening of resin.This resin is preferably the thermosetting resin of unsaturated polyester resin, epoxy resin, vinylester resin, phenolic resins, poly-peace base formic acid fat, maleimide resin or cyanate ester resin and so on, and this fibre plate is several glass fibres, or be that the staple fibre shufflings such as several carbon fibers, quartz fibre, nylon fiber, yarn fiber or Ke Weila fiber or unidirectional fibre combine

After above-mentioned each fiberboard 1 sclerosis, the thickness of arbitrary fiberboard 1 is preferably at below 1mm; The porosity of fiberboard 1 is below 15%, and this porosity is defined as: in a unit volume, and the clearance space between each fiber accounts for the ratio of this unit volume.Wherein, fiberboard 1 is shaped to thin plate, can allow on the one hand thermosetting resin infiltrated fiber sheet easily each fiber between, to save the time of shaping sheet, and due to its sclerosis after fiberboard 1 thinner, can be out of shape very soon during heating, more not easy fracture or layering time bending, and can rapid shaping after pressurization; On the other hand, thermosetting resin can between each fiber of infiltrated fiber sheet easily, so that the porosity of fiberboard 1 is controlled below 15%, and due to porosity little, then the surface hole defect of its monolithic fibre board 1 is less, outward appearance is good, and can make Single Fiber plate 1 after hardened forming, there is enough unit strengths.

As shown in Figure 3, step b be take the identical fiberboard of two panels shape size 1 and heat can plastic sheet 1 ', during enforcement, fiberboard 1 and heat can the shape size of plastic sheet 1 ' also can be different.This mould 3 is a male model with protrusion module, and during enforcement, this mould 3 also can be the master mold that has die cavity; And its pressuring method mechanically direct weighting, or with gases at high pressure press molding.When the fiberboard 1 hardened and heat can plastic sheet 1 ' be pasted with viscose 4 mutually, and be positioned on mould 3, heated again, when pressurizeing, because viscose 4 does not harden immediately, the shape of fiberboard 1 in planar sheet of sclerosis, still has the space of distortion, therefore, can make fiberboard 1 in deformation process, allow fiberboard 1 and heat can plastic sheet 1 ' fibre plate relative sliding with cohere again, to be shaped to a dimensional fibre shell 5.During enforcement, this heat plastic sheet 1 ' can also can be a plastic plate.And these fiberboards 1 and heat can plastic sheet 1 ' also can leading preheating, then insert in mould 3 and give extrusion forming.The fiberboard 1 that this has hardened and still unhardened heat can the fibre plate of plastic sheet 1 ' also can not use viscose 4 mutually to paste, but utilize the resin at least one deck fibre plate, allow fiberboard 1 and heat mutually cohere the fibre plate of plastic sheet 1 ' after the heating.

Therefore, the present invention has following advantage:

1, fiberboard used in the present invention can first with a lot of sheet of mode one-shot forming of concora crush again after stacking, thus, can in one-time formed process, obtain volume and the fiberboard hardened, and utilize the fiberboard that hardened and heat can plastic sheet upper and lower stacked after, give temperature-pressure more shaping, its shaping time can complete within several minutes, therefore, use method of the present invention, the time of original compression molding processing procedure significantly can be shortened, to reach a large amount of demand manufactured, and reduce production cost.

2, fiberboard used in the present invention is thinner has flexible characteristic, distortion that can be very fast when heating, pressurization, not easily break during compression molding, and owing to forming for fiber and thermosetting resin sclerosis, also there is suitable intensity, therefore, can after plastic sheet heating, pressurization bind in fiberboard and heat, the effect that not only effectively can reach protection, guarantee product intensity and can effectively weight reduction with meet user and carry and easy to operate on demand.

3, in the molding mode of traditional fibre shell, general cognition be thermosetting resin sclerosis after rigidity high, and as force stressed namely can be damaged, therefore adopt one-shot forming mode.But the present invention can break through the shaping idea of tradition of fiber shell, by flake and the fiberboard hardened and heat can plastic sheet upper and lower stacked after, again heat, pressurize, make generation change in shape again and combination.Wherein, namely fiberboard because of sclerosis heat time of laminating very shortly can soften, shaping bending time need not very large pressure, layer has again the slip of viscose or resin with interlayer and is combined, the fiberboard of former sclerosis can not be thus brittle, therefore form dimensional fibre shell and still have a high rigidity, therefore, the secondary form of construction work of composite panel aurification does not still have breakthrough by the present invention in abstracto, and real benefit is also significantly promoted.

In sum, according to content disclosed above, the present invention really can reach the object of expection, there is provided a kind of not only can rapid shaping, a large amount of to manufacture, can make shaping after there is enough intensity and can the forming method of the effective fiber shell of loss of weight, have the value that industry utilizes, therefore propose application for a patent for invention in accordance with the law.

Claims (6)

1. a forming method for fiber shell, is characterized in that, comprising:

A. the fiberboard providing at least a slice to harden and at least a slice heat can plastic sheets, and wherein, this fiberboard is at least after one deck fibre plate preimpregnation thermosetting resin, through heating, pressurize that thermosetting resin is hardened after shaping flat board; And

B. heating this heat can plastic sheet and this fiberboard, and can plastic sheet and fiberboard be placed in a mould by upper and lower stacked heat, and to pressurize, this heat can plastic sheet and this fiberboard make to be shaped to a dimensional fibre shell.

2. the forming method of fiber shell as claimed in claim 1, it is characterized in that, more comprise a fiberboard forming step: i.e. preimpregnation thermosetting resin on several fibre plate, these fibre plates are separated up and down, heat again, pressurizeing makes thermosetting resin harden, with shaping several independent up and down and fiberboard hardened.

3. the forming method of fiber shell as claimed in claim 1 or 2, is characterized in that, this heat can plastic sheet be the fibre plate of at least one deck pre-soaked resin.

4. the forming method of fiber shell as claimed in claim 1 or 2, it is characterized in that, the porosity of this fiberboard is below 15%.

5. the forming method of fiber shell as claimed in claim 1 or 2, it is characterized in that, the thickness of this fiberboard is at below 1mm.

6. the forming method of fiber shell as claimed in claim 1 or 2, it is characterized in that, this heat can plastic sheet be a plastic plate.