DD142312A1 - METHOD AND DEVICE FOR TRAINING POROESER SUBSTANCES - Google Patents

Abstract

The invention particularly relates to the continuous Fill cavities with polymerizable or solidifiable. Liquids within web-like solids. Aim, st the impregnation of solids of different thickness and usamensetzung. It is essential in the continuous process Rössere material thickness web-like porous substances than previously without to ensure a large proportion of bubbles. According to the invention ontinuously between a transport foil and cover foil one Lüssigkeitsschicht applied and the cover sheet with the soaking material webs in a first contact with a Contact roller brought. Subsequently, the cover sheet between a Guide roller pair by means of a deflection of the Liquid layer lifted and then back on the Fluid layer forced, wherein in the cover sheet and liquid layer laterally closed space a vacuum is produced. For the production of different thickness / materials is the Guide roller pair and deflection height-adjustable formed,

Description

Announcement Hans Schlegel

402 HaIIe ₅ Ernst-Grube-Straße 1?

Leit-BfN "Welding Technology" in the central institute for welding technology of the GDR 403 Halle, PSF 16

Method and device for impregnating porous substances

Field of application of the invention

The invention relates to a method and apparatus for impregnating porous substances, in particular for the continuous filling of cavities with polymerizable or solidifiable liquids within web-like solids _s preferably foams, Tesitilfasergebilde, -Füllstoffe, multilayer films or «, their combinationsο

Characteristic of the known technical solutions

It is bekannts that polymerizable or solidifiable liquid substances used for filling cavities in the porous structures ,, - 'The impregnation process and equipment used to $ e differ according to the intended use / Ultimately, however, there

ff 1 4 40

the goal of impregnation is to replace the original air in the pores with a liquid »

In the simplest case, the impregnation is carried out by a casting or dipping process ₅ in which the heavier liquid. ness the lighter air displaced "Such operations are often associated with Kapillarvorgängen _o When filling of cavities in castings of Tränkeffekt can often be improved if additional pressure differences are generated ,, D ₀ iu when the air evacuated or vacuum to the pores of the liquid can be pressed into the pores with increased pressure. On this basis, there are also processes for producing fiber-reinforced synthetic resins. In this process, the reinforcing materials are inserted into multi-part molds. In addition, resin is poured in by pressing the mold and the resin displaces the air which escapes from the edge of the mold. In injection molding, the resin is not pressed or vacuumed until the forin is closed Combination iqjiziert «·. -

Essential characteristic of all these procedures is a. discontinuous process adapted to the single piece « . Continuous methods of impregnation are known primarily in the production of fiber-reinforced synthetic resins? All of these methods and associated equipment are either tuned to meet the time required for complete wetting and impregnation (this requires extensive and expensive equipment, roving wrapping, continuous board production), or to accept an air bubble fraction in the finished part, which a reduced quality results (impregnation by rolling between films) ,,

Another major disadvantage of all continuous processes is the fact that only a few roving strands or bands or thin fiber structures can be soaked. "No method is known which can continuously impregnate laminates several millimeters thick without significant air inclusions."

Object of the invention

The invention provides a method and apparatus for impregnating porous materials to provide _s in particular the continuous impregnation-of cavities in web-like arranged solids of different thickness and composition is made possible in an economical manner.

The essence of the invention

The invention has for its object to design a method and apparatus for impregnating porous materials so that in the continuous process a much larger material thickness of web-like porous substances than hitherto ensured by reducing the air bubble fraction _o

The object of the invention is achieved by a method j and the disadvantages described in the prior art by _s eliminated that according to the invention continuously between a transport film and cover film, a liquid layer-coated _β Keeping the transport film takes place over a flat table, the liquid layer may be between the layers or laterally fed * The cover sheet is with the

A «Π / j Α

Π / j

to be soaked webs ₉ which consist of several identical or different layers or, may be composed differently _? Subsequently, the cover sheet between a pair of guide rollers is lifted by means of a deflection of the liquid layer and then forced again on the liquid layer, wherein in the laterally closed by the cover sheet and liquid layer seam a vacuum is generated the generation of a negative pressure within the deflection is guaranteed «, that the cover sheet before and behind the deflection close to the material web located between it and the transport foil and the outer air pressure promotes the impregnation substantially» Thus, the implementation of • continuous impregnation processes in web-like Materials in a simple manner and with little effort possible.

To carry out the method is a device which is characterized in essence by a roller system consisting of a contact roller and a Führungswalzenpaar5 which is associated with a deflection, which optionally has a vacuum lock or can be supplemented by an additional vacuum connection »For lateral sealing the deflection are arranged sealing elements pair of guide rollers and deflection are designed to be adjustable in height to ensure the production of thick materials, ·

embodiment

The invention will be explained in more detail below using an exemplary embodiment. In the associated drawing

21! 44

show;

Fig. 1 ί a schematic representation of the device for impregnating porous substances

FIG. 2: a plan view according to FIG. 1

3 shows a section A-A through the deflection device according to FIG. 1.

To carry out the method according to FIG. 1, a liquid layer 2 is applied to the transport foil 1, whereafter the material webs 3 to be impregnated and the cover foil 4 are fed in. The Eontakt roll 5 effects a first contact of the substances. The cover film 4 is forcibly guided under the guide roller pair 6 via the deflection device 7. Within the deflection device 7, a vacuum is generated via the vacuum connection 8, which may be 0.5 to 0.9 bar, for example, when impregnating glass fibers with polyester resin. "The lateral sealing of the deflection device 7 is effected by elastic sealing elements 9y which at the same time seal against Transport and cover sheet Λ ι 4- effect »To prevent bleeding of the liquid layer 2 to the side are on the table, not shown in the drawing under the transport foil 1 side boundaries 10 arranged« For the production of different thickness materials, the guide roller pair 6 and the deflection device. 7 adjustable in height «For the acceleration of the impregnation process or for the processing of molten substances, the fish can be heated *

Claims (1)

21 1 440  invention claim Process for impregnating porous substances, in particular for the continuous filling of cavities with polymerisable or solidifiable liquids within web-shaped solids, permitting the impregnation of porous materials having a substantially greater material thickness without substantial proportion of air bubbles, characterized in that continuously between a transport film (1) and covering film (4) a liquid coating layer (2) applied and the cover sheet (4) are brought to the impregnated material webs (3) in a first contact with a Zontaktwalze (5) that the cover sheet (4) between a pair of guide rollers (6) with the aid of a deflecting device (7) lifted from the liquid layer (2) and subsequently forced again on the liquid layer (2), wherein in the cover by (4) and liquid layer (2) laterally closed hardly a vacuum is generated » Device for impregnating porous substances according to item 1, characterized by a roller system consisting of Zontaktwalze (5) and a Führungswaizenpaar (6), which is associated with a deflection device (7), which optionally has a vacuum connection (8) 'or by an additional Vacuum connection (8) is added, wherein for the lateral sealing of the deflecting device (7) sealing elements (9) are arranged. 2β I 4 40 3 · Device for impregnating porous substances according to items 1 and 2, characterized as, by, that the guide roller pair (6) and deflection device (7) are designed to be height adjustable. - For this a sheet of drawings -