CN205317632U

CN205317632U - Fibre preforming body Z is to permeability testing arrangement

Info

Publication number: CN205317632U
Application number: CN201520995895.7U
Authority: CN
Inventors: 李伟东; 刘刚; 包建文
Original assignee: BEIJING INSTITUTE OF AERONAUTICAL MATERIALS CHINA AVIATION INDUSTRY GROUP Corp
Current assignee: BEIJING INSTITUTE OF AERONAUTICAL MATERIALS CHINA AVIATION INDUSTRY GROUP Corp
Priority date: 2015-12-03
Filing date: 2015-12-03
Publication date: 2016-06-15
Anticipated expiration: 2025-12-03

Abstract

The utility model relates to a fibre preforming body Z is to permeability testing arrangement. Realize the resin and follow the mobile Z of preforming body thickness direction uniform section to permeability testing arrangement. Z uses the mould to permeability testing arrangement including the test, resin distributor and pressure sensor triplex, the mould includes the mould for the test, lower mould and thickness adjustment frame, wherein the thickness adjustment frame waits the thickness cushion to form by four, four are waited the thickness cushion to pass through bolted connection together, the thickness adjustment frame is arranged in between mould and the lower mould, the bolted connection of thickness adjustment frame sentences and cooperation department of thickness adjustment frame and last mould and lower mould has all set up the seal groove, the resin distributor is woven by lurex and is formed, multilayer composite construction, two pressure sensor pass through the spiro union mode and install respectively on last mould and lower mould. This testing arrangement can realize that the Z that different viscosity resins were personally experienced sth. Part of the body to fibre preforming tests to the permeability, helps establishhing resin viscosity, fibre preforming body structural style and the relation of Z to the permeability.

Description

A kind of perform manufacturing Z-direction rate of permeation test set

Technical field

The utility model relates to a kind of perform manufacturing Z-direction rate of permeation test set.

Background technology

Resin transfer moulding (ResinTransferMoulding, RTM) technology, as the typical case's representative in matrix material liquid condition shaping technique, becomes one of the mainstream technology realizing high performance composite cost degradation and manufacturing in recent years. RTM technological principle drives liquid resin to infiltrate the perform manufacturing of dry state by external pressure in closed mould cavity.

Injection system in traditional RTM moulding process many employings face, this is because under identical volume fraction, (X, Y-direction) rate of permeation K in fiber preform dignity_x、K_yGenerally than the rate of permeation K in thickness (Z-direction) direction_zA high order of magnitude, when carrying out in face injection, resin is relatively little at the resistance of preform internal flow, and resin between layer, the flowing at interfascicular position be better than in layer, position in bundle. In general face, injection system is applicable to manufacture the RTM composite product of small-sized thin-walled structure. For large-scale RTM composite product, adopt injection system in traditional face may exist long-range in resin open phase and face flow between contradiction. Under technological temperature, just there is the situation that viscosity significantly increases in the non-complete wetting dry state fiber of the resin at flow fronts place, and then terminates the flowing of rtm resin, and the large-scale RTM composite product of preparation exists the position not infiltrated by resin flows.

The test of traditional perform manufacturing thickness direction rate of permeation is generally enter perform manufacturing inside with a form for injection, and its flow fronts is that radiativity is dispersed, and still there is the contradiction between open phase and long-range flowing.

Summary of the invention

The purpose of this utility model proposes a kind of test fluid flow that can realize evenly to flow along preform thickness direction uniform cross section and the perform manufacturing Z-direction rate of permeation test set that shortens inject time to greatest extent. Technical solution of the present utility model is: Z-direction rate of permeation test set comprises test mould, resin dispenser and pressure transmitter three part, test mould comprises upper die and lower die and thickness adjustment frame, wherein thickness adjustment frame is made up of four pieces of equal thickness cushion blocks, four pieces of equal thickness cushion blocks are bolted together, thickness adjustment frame is placed between upper die and lower die, and the bolt junction of thickness adjustment frame and the combination section of thickness adjustment frame and upper die and lower die are all provided with sealing groove.The multi-layer compound structure that resin dispenser is woven by steel fiber. Two pressure transmitters connect mode by spiral shell and are arranged on respectively on upper die and lower die.

Described resin dispenser is the multi-layer compound structure of the metal material with soft degree, and the multi-layer compound structure of metal material is at the density degree Parameter adjustable of X-, Y-and Z-direction mesh.

Described pressure transmitter is steel strain gauge pressure sensor, and the sensitivity of pressure transmitter is ± 0.01kPa.

The advantage that the utility model has and useful effect are, the utility model have employed preset resin dispenser mode in die cavity, utilize resin dispenser to realize resin to flow along perform manufacturing Z-direction uniform cross section, resin can be realized evenly flow along preform thickness direction uniform cross section, effectively control resin flows forward's curved surface shaped looks, avoid that test process occurring, resin holds phenomenon, improve the accuracy of Z-direction rate of permeation test, and then shortening inject time, maximum degree alleviates the contradiction between resin open phase and flow process. Different viscosity resin can be realized by this test set the Z-direction rate of permeation of perform manufacturing to be tested, contribute to setting up the relation of resin viscosity, perform manufacturing structure formation and Z-direction rate of permeation, for preparation high-performance, large size, RTM composite structure that heavy thickness, internal soundness are intact provide technology theory foundation.

Accompanying drawing explanation

A kind of perform manufacturing Z-direction rate of permeation test set structural representation of Fig. 1;

Fig. 2 is the A-A view of Fig. 1.

Embodiment

Z-direction rate of permeation test set comprises test mould, resin dispenser and pressure transmitter three part, and test mould mainly comprises patrix 1, counterdie 5 and thickness adjustment frame 9 and forms. Wherein thickness adjustment frame 9 is made up of four pieces of equal thickness cushion blocks, and has been bolted, and bolt junction and thickness adjustment frame 9 are all provided with sealing groove with patrix 1, counterdie 5 die face combination section, utilize silicon rubber bar to carry out encapsulation process. Resin dispenser 4 is combined into the multi-layer compound structure with certain soft degree by hot pressed sintering after steel fiber weaves, then by conventional high temperature rolling planarizing process, obtains the layered porous medium of surface finishing. Its metal material and the structural parameter such as X-, Y-and Z-direction mesh density degree are adjustable; The pressure transmitter 7 and 10 of monitoring liquid flow process is steel strain gauge pressure sensor, and the sensitivity of pressure transmitter used is ± 0.01kPa, connects mode by spiral shell excessively and is arranged on respectively on upper die and lower die.

Concrete test set is assembled, and perform manufacturing preparation carries out as follows:

(1) mold cleaning: clear up outside surface in mould with acetone solvent, employing is threaded and is connected with mold 1 by mold pressure transmitter 10, bed die pressure transmitter 7 is connected with bed die 5 simultaneously, and detects the sensitivity of upper and lower mould surface pressure sensor by finger-press method;

(2) resin dispenser 4 is manufactured and is installed: according to bed die molding surface size cutting resin dispenser, resin dispenser edge is about 5mm far from bed die profile edge, it may also be useful to resin dispenser is fixed in bed die profile by bouncing putty bar. Use silicon rubber bar 8 that the sealing groove in die pad frame 9 is carried out encapsulation process, then die pad frame is placed on bed die, makes after combination to be tightened by bolts, and then complete the assembling of testing mould former;

(3) prepared by perform manufacturing 3: the paving carrying out heavy thickness perform manufacturing according to the ply sequence of design covers operation. In order to avoid that test process occurs Z-direction fringing effect, cover in process perform manufacturing paving and self-vulcanizing sizing agent evenly is coated on every layer of fabric edge, width is about 10mm, after completing perform manufacturing preparation, it is placed in vacuum bag, under a barometric point effect, completes the solidification of edge self-vulcanizing sizing agent.

(4) perform manufacturing lateral seal process 2: the perform manufacturing prepared is carried out edge finishing, and the gap ensured between preform edge and die pad frame is 5mm. Then adopt liquid cured resin at room temperature that gap preset between die pad frame and preform is carried out envelope to fill out. Due to the technological operation of (2) and (3), can ensure that low-viscosity cured resin at room temperature can not penetrate into resin dispenser and preform inside, carry out closing modulo operation when cured resin at room temperature reaches gelation point, can effectively avoid, in Z-direction saturated permeability test process, fringing effect occurs.

(5) perform manufacturing Z-direction saturated permeability test: be connected with constant current injecting systems and pressure monitor system respectively by mold system, has opened permanent volume pump, resin is injected in mould by gum-injecting port 6 with the flow of 5ml/min～50ml/min. Resin is Fast Filling resin dispenser first, so and taking the whole profile of resin dispenser as initial injection surface, under the driving of constant current injecting systems, resin, along the flowing of preform thickness direction uniform cross section Z-direction, utilizes mold pressure transmitter 10 and bed die pressure transmitter 7 to detect the pressure change of preform upper and lower surface in injection process. After all gum outlets of mould upper surface all have resin to flow out, collect and with the outflow flow of graduated cylinder testing tree fat, when flowing out flow and be equal with injection flow, show that flowing has entered saturation stage, record the reading of flow now and mould upper and lower surface pressure transmitter.

(6) data processing: in conjunction with resin flow and the pressure difference of saturation stage, carry out the calculating of perform manufacturing Z-direction saturated permeability according to Darcy law.

Claims

1. a perform manufacturing Z-direction rate of permeation test set, it is characterized in that, Z-direction rate of permeation test set comprises test mould, resin dispenser and pressure transmitter three part, test mould comprises patrix, counterdie and thickness adjustment frame, wherein thickness adjustment frame is made up of four pieces of equal thickness cushion blocks, four pieces of equal thickness cushion blocks are bolted together, thickness adjustment frame is placed between upper die and lower die, the bolt junction of thickness adjustment frame and the combination section of thickness adjustment frame and upper die and lower die are all provided with sealing groove, resin dispenser is woven by steel fiber, multi-layer compound structure, two pressure transmitters connect mode by spiral shell and are arranged on respectively on upper die and lower die.

2. a kind of perform manufacturing Z-direction rate of permeation test set according to claim 1, it is characterized in that, described resin dispenser is the multi-layer compound structure of the metal material with soft degree, and the multi-layer compound structure of metal material is at the density degree Parameter adjustable of X-, Y-and Z-direction mesh.

3. a kind of perform manufacturing Z-direction rate of permeation test set according to claim 1, is characterized in that, described pressure transmitter is steel strain gauge pressure sensor, and the sensitivity of pressure transmitter is ± 0.01kPa.