CN1037250C

CN1037250C - Composite component mfg. method

Info

Publication number: CN1037250C
Application number: CN91104969A
Authority: CN
Inventors: 蔡科然
Original assignee: WANTONG SPORT FACILITIES INDUSTRY Co Ltd
Current assignee: WANTONG SPORT FACILITIES INDUSTRY Co Ltd
Priority date: 1991-07-25
Filing date: 1991-07-25
Publication date: 1998-02-04
Anticipated expiration: 2006-07-25
Also published as: CN1068771A

Abstract

The present invention relates to a preparation method of a composite material element. In the method, different fiber composite materials are used to manufacture a sealing and hollow shell body, and a certain amount of volatile substances are put into the shell body; then the shell body is rotated in a mould and appropriately heated to make the volatile substances gasified and expanded, and the generated pressure make the composite materials expanded to butt tightly with the inner surface of the mould and moulded. The present invention has the characteristics that the method is simple, and the moulding is quick, even, precise.

Description

The manufacture method of composite component

The present invention relates to a kind of manufacture method of composite component.

The general trend that manufactures a product with composite is more and more obvious, because it has the good lightweight advantage of matter, material selection is then with carbon fiber, glass fibre, Kevlar fibers (KEVLAR, the du pont company product) etc., wherein the use of preimpregnation cloth material is the most general, and be made as example with general racket, the ball made from composite adopts (1) foaming preparation method or (2) air air blast to make mostly, the former mainly inserts the expanded material or the Foamex of strip in composite, its one is inserted in the mould, and heating makes the expanded material foaming and intumescing, utilizes expansion to make to be located in outer composite to be strutted and is affixed on die for molding; Yet, with the forming method of expanded material foaming in the process that expands, can't be provided at that constant weight restriction produces down evenly and enough big pressure on by shaped object, the moulding of composite needs can provide in manufacturing process evenly and pressure stable, can obtain the preferable product of a quality, therefore, the foaming body foaming mode of commonly using obviously can not be done effective control, to such an extent as to product material thickness may be because this local pressure differs, cause undercapacity or the phenomenon that stress is concentrated takes place, in addition the aspect is then because stay in finished product after the foaming body moulding, so that the finished weight that makes just seems is heavier.

Second method provides hyperbar for utilizing air compressor machine, make and blow to inner face and be equipped with in the mould of composite, utilize outwards expansion effect of pressure-air, material is strutted be close to die for molding, this kind method is for using maximum methods now, it not only is used in racket making aspect, also be applicable to thing manufacturings such as bicycle pipe support, yet it must possess many aerodynamic force pipelines, air compressor machine and control appliance, and essential a dozen pores of reserving of this kind method are when air pressure is too big, often cause the valve position that gas leak phenomenon is often arranged, some product must avoid inflating the design of hole connector in addition, and at this moment, this method then can not be used.

Main purpose of the present invention is in order to overcome the deficiencies in the prior art, to provide a kind of comparatively simple, and shaping speed is very fast, and can make quality of finished even, the manufacture method of the composite component of lighter weight.

The manufacture method of composite component of the present invention, be to adopt multiple material stacked, the material that cooperation nylon tube etc. can be sealed up for safekeeping constitutes the hollow housing of a sealing, in this hollow housing, preset a certain amount of volatile materials, be placed on one heating in the mould then, volatile materials gasification in the hollow housing is expanded, and the consequent bulbs of pressure of mat make composite be affixed on die face closely and moulding.

In the inventive method, described multilayer material comprises preimpregnation cloth, or comprises the composite of carbon fiber; Described volatile materials comprises chemical solvents such as toluene, and its consumption is calculated by the gas dynamic equation formula.

Brief Description Of Drawings

Fig. 1 places the state diagram of mould for hollow housing of the present invention;

Fig. 2 is the composition diagram of hollow housing of the present invention.

Below in conjunction with accompanying drawing, describe the present invention.

The manufacture method of composite component of the present invention, mainly be with multilayer material, as preimpregnation cloth or comprise the composite of fiber, for example, boron fibre or glass fibre, or employing carbon fiber, most applications is to adopt carbon fiber, and is stacked, forms the hollow housing 1 (as shown in Figure 2) of a sealing, wherein, all be a predetermined angle between each layer material and arrange lamination.

Before composite of the present invention needs in inserting mould 2 (referring to Fig. 1), the nylon tube of prefabricated one withstand voltage anti-solvent and anti-forming temperature, and make the hollow housing 1 of a sealing, with volatile materials, inject wherein as the toluene chemical solvent.This material that described volatile materials is initially liquid condition reaches required pressure in heating and gasifying can make housing 1.When the wheel of Regular Bicycle was made, internal pressure was 7kg/cm ²The time, about 3 milliliters of required solvent, racket then still less is about 0.5 milliliter, with regard to cost, very simplify, because of contained solvent few, so do not have the misgivings that pollute, and with common solvent, be during use and inject nylon tube coating design, inner residual solvent is run off, do not have the misgivings of residual contamination so after moulding, can hole; Especially when actual job, even can add a spot of moisture content, the vapour pressure that is produced, can be evenly and easily, utilize the gas pressure that gasification produced and make the composite that housing 1 is outer, be subjected to crowded and expansion from inside to outside, till being close to mould 2 inner surfaces, via mould 2 cooling back die sinkings, just can making wherein, product takes out, and the product that takes out is a hollow state, the product weight that obtains is lighter, and because the air pressure in the same space should be impartial, so in the process that expands, composite is for expanding outwardly equably, thereby product wall thickness density also has preferable effect; In the methods of the invention, the key of moulding is the consumption control of volatile materials, and too much and all will influence the finished product molding effect very little, yet the control of this kind amount but can and obtain via the gas dynamic equation formula calculating of the following stated:

PV＝nRT＝(m/M)RT

Wherein P is a required pressure (atm) in the housing (1)

V is a spatial volume (I) in the housing (1)

N is gas mole (mole) number

M is volatile materials quality (gm)

M is volatile materials molecular weight (gm/mole)

R is gas constant (0.082 atm l/mole k)

T be absolute temperature (K) (℃+273=K)

Be when making selected at the volume V of process middle shell 1 inside of operation and volatile materials molecular weight M, temperature required T and required that material is opened pressure P is also selected when making, cooperate known gas constant R, so the gas dynamic equation formula of using as above just can be calculated required volatile materials consumption accurately, thereby forming process of the present invention can operated under the controlled condition fully.Below just be used as explaining with an example.

Hollow housing volume: V=0.07l

Forming temperature: T=273=150 ℃=423K

Required pressure: P=10atm

R＝0.082atml/mole?K

The molecular weight of volatile materials is 97gm/mole

Use above equation and calculate, the quality that can obtain required volatile materials should be 1.96gm.Therefore, can accurately control the requirement of the solvent in the housing, thereby can also be under planned operating procedure, make required cost minimum and can obtain product best in quality by calculating.

The present invention compares with traditional methods, does not need unnecessary pneumatic shuttle With pipeline, also do not need foaming body, not only can make light weight and quality is good Product, also very convenient for cost and technical control, and general system Doing such as racket, the required volatile materials of bicycle frame pipe only is 0.5 Get final product between～5 grams, so solvent load is very limited, is one to have novelty The property and the invention of dark tool industrial value.

Claims

1. the manufacture method of a composite component, it is characterized in that: prepare a mould with empty chamber of described composite component shape, the material fit nylon tube that multilayer is used to form composite component constitutes the hollow housing of a sealing to form described composite component shape, in this housing, add volatile materials, the amount of this volatile materials is close to the amount of the empty chamber surface of mould for reaching the hollow housing expansion after being heated at it, then it is positioned over one heating in the mould, volatile materials in the hollow housing is expanded because of gasification, and this hollow housing closely is affixed on the surface of the empty chamber of mould, make described composite component.

2. manufacture method as claimed in claim 1 is characterized in that: the material that multilayer is used to form composite can be a preimpregnation cloth, or comprises the composite of carbon fiber.