FR2618378A1 - Microwave pultruder - Google Patents
Microwave pultruder Download PDFInfo
- Publication number
- FR2618378A1 FR2618378A1 FR8705879A FR8705879A FR2618378A1 FR 2618378 A1 FR2618378 A1 FR 2618378A1 FR 8705879 A FR8705879 A FR 8705879A FR 8705879 A FR8705879 A FR 8705879A FR 2618378 A1 FR2618378 A1 FR 2618378A1
- Authority
- FR
- France
- Prior art keywords
- die
- fact
- microwave
- transparent windows
- done
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/78—Arrangements for continuous movement of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
- B29C33/06—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using radiation, e.g. electro-magnetic waves, induction heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/525—Component parts, details or accessories; Auxiliary operations
- B29C70/526—Pultrusion dies, e.g. dies with moving or rotating parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/525—Component parts, details or accessories; Auxiliary operations
- B29C70/528—Heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
- B29C2035/0855—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using microwave
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
Description
La présente invention concerne les dispositifs destinés à la fabrication des matériaux composites se présentant sous forme de joncs ou de tubes à section quelconque
Dans les dispositifs actuels visant le même but, les calories nécessz^e.x 2 #a polymérisation de la résine liant les fibres sont, apportées par le contact thermique avec le corps de chauffe. On conçoit facizament que ce transfert thermique s'effectue difficilement car on se trouve en présence de matériaux, fibres ou résines mauvais conducteurs de ta chaleur.The present invention relates to devices for the manufacture of composite materials in the form of rods or tubes of any section
In current devices for the same purpose, the calories required ^ ex 2 #a polymerization of the fiber-binding resin are provided by thermal contact with the heating body. It is easy to see that this heat transfer is difficult to do because we are in the presence of materials, fibers or resins that are poor conductors of your heat.
Le dispositif, suivant l'invention, permet d'éviter ce mauvais tranfert thermique entre la filière chaude et le matériau à polymériser . On améliore ainsi la productivité du système et la qualité du produit final obtenu car on évite une surchauffe de la peau superficielle du produit fabriqué. The device according to the invention makes it possible to avoid this bad thermal transfer between the hot die and the material to be polymerized. This improves the productivity of the system and the quality of the final product obtained because it avoids overheating of the surface skin of the manufactured product.
Le dispositif objet de l'invention comporte une filière métallique ayant la section du profilé à fabriquer ( Figure 1). Les fibres qui composent le jonc à fabriquer sont introduites en amont de la filière et sont tirées en aval de la filière . Dans le corps de chauffe sont aménagées des fenêtres qui permettent d'injecter l'énergie micro-ondes fournie par des magnétrons ou des klystrons. The device which is the subject of the invention comprises a metal die having the section of the profile to be manufactured (Figure 1). The fibers that make up the rod to be manufactured are introduced upstream of the die and are pulled downstream of the die. Windows are fitted in the heating body which allow the microwave energy supplied by magnetrons or klystrons to be injected.
Suivant la section du matériau à traiter, on choisira la fréquence de travail: pour des joncs de 5 à 10 cm de diamètre on utilisera la bande industrielle 2450MHz; pour des joncs de petits diamètres, de l'ordre du centimètre votre moins, on utilisera la bande X à 10000MHz (longueur d'onde 1 cm). Depending on the section of the material to be treated, the working frequency will be chosen: for rods 5 to 10 cm in diameter, the industrial band 2450MHz will be used; for rods of small diameters, of the order of a centimeter at least, we will use the X band at 10000MHz (wavelength 1 cm).
L'énergie micro-ondes est injectée dans la filière par des fenêtres en quartz ( matériau transparent aux ondes et possédant une très bonne tenue mécanique). Ces fenêtres sont conçues de telle façon qu'elles puissent résister à la pression pouvant apparaître dans le corps de la filière . Elles seront disposées tout autour de la filière de façon à appliquer l'énergie micro-ondes avec une grande homogénéité. Microwave energy is injected into the die through quartz windows (material transparent to waves and having very good mechanical strength). These windows are designed in such a way that they can withstand the pressure that may appear in the body of the die. They will be arranged all around the die so as to apply microwave energy with great homogeneity.
Pour éviter que les parois de la filière constituent une partie froide, celle-ci est thermostatée à une température dépendant de la nature de la résine à polymériser 'Dans le cas contraire ce serait la matière échauffée sous l'action des micro-ondes Qui @@@@@@@@ @ @@ @@@@@@ @@@ @@@@@@@@ @@@@@@@@@@@@ @@ @@@ @@ obtiendrait, de ce fait, un mauvais état de surface du à une insuffisance de la polymérisation superficielle. La partie aval de la filière pourra présenter une légère conicité de façon à faciliter la sortie du produit à polymériser
il va de soi que si, en cours de polymérisation des gaz venaient à se dégager, cette deuxième zone de la filière serait mise en communication avec l'extérieur par des trous servant d'évents.To prevent the walls of the die from forming a cold part, this is thermostatically controlled at a temperature depending on the nature of the resin to be polymerized. Otherwise, it would be the material heated under the action of microwaves Who @ @@@@@@@ @ @@ @@@@@@ @@@ @@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@ in fact, a poor surface finish due to insufficient surface polymerization. The downstream part of the die may have a slight taper so as to facilitate the exit of the product to be polymerized.
It goes without saying that if, during the polymerization of the gases were to emerge, this second zone of the die would be placed in communication with the outside by holes serving as vents.
Une variante du montage peut permettre d'obtenir des profilés creux . En effet, si l'on place dans la partie amont, dans la zone non encore chauffée a une aiguille du diamètre du trou à réaliser , les fibres vont se répartir de part et d'autre de cette aiguille (figure 2). A variant of the assembly can make it possible to obtain hollow profiles. Indeed, if we place in the upstream part, in the area not yet heated has a needle of the diameter of the hole to be made, the fibers will be distributed on either side of this needle (Figure 2).
Dans la deuxième partie, l'extémité de l'aiguille jouera le rôle de l'âme d'un cable coaxial, les fibres se comportant comme un diélectrique à pertes. In the second part, the end of the needle will play the role of the core of a coaxial cable, the fibers behaving like a dielectric at losses.
L'excitation micro-ondes se fera grâce à un guide fonctionnant suivant le mode Halo, le champ électrique étant parallèle à l'âme, il excitera deux ondes transversales se propageant en sens inverse (figure 3). Compte tenu que ces ondes excitées sont transversales, elles ne pourront induire aucune énergie micro-ondes dans les autres sources (figure 4). The microwave excitation will be done by a guide operating in the Halo mode, the electric field being parallel to the core, it will excite two transverse waves propagating in opposite directions (Figure 3). Given that these excited waves are transverse, they cannot induce any microwave energy in the other sources (Figure 4).
Le dispositif objet de l'invention peut être utilisé dans tous les cas où il s'agit de fabriquer un profilé plein ou creux en matériau composite à base de fibres isolantes et de résines, et cela par la technique dite de p@ltrusion. The device object of the invention can be used in all cases where it is a question of manufacturing a full or hollow profile in composite material based on insulating fibers and resins, and this by the technique called p @ ltrusion.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8705879A FR2618378A1 (en) | 1987-04-22 | 1987-04-22 | Microwave pultruder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8705879A FR2618378A1 (en) | 1987-04-22 | 1987-04-22 | Microwave pultruder |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2618378A1 true FR2618378A1 (en) | 1989-01-27 |
Family
ID=9350481
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8705879A Withdrawn FR2618378A1 (en) | 1987-04-22 | 1987-04-22 | Microwave pultruder |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2618378A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2245893A (en) * | 1990-07-10 | 1992-01-15 | Shaw John Ltd | Fibre reinforced plastic composites |
EP0726127A1 (en) * | 1995-02-02 | 1996-08-14 | Hüls Aktiengesellschaft | Moulds for forming latex foam articles using microwave energy |
WO2008128527A2 (en) | 2007-04-23 | 2008-10-30 | InKraft, Ingenieurgesellschaft für kraftgeregelte adaptive Fertigungstechnik mbH | Method for shaping profiles of unidirectional fibre reinforced composite materials during the production process |
WO2011073433A1 (en) * | 2009-12-17 | 2011-06-23 | Sgl Carbon Se | Method for producing fiber composite structures, including microwave curing step, and fiber composite structure thereby obtained |
CN102729313A (en) * | 2011-04-11 | 2012-10-17 | 李苏扬 | Extrusion equipment provided with microwave heating device for plant fiber product |
-
1987
- 1987-04-22 FR FR8705879A patent/FR2618378A1/en not_active Withdrawn
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2245893A (en) * | 1990-07-10 | 1992-01-15 | Shaw John Ltd | Fibre reinforced plastic composites |
GB2245893B (en) * | 1990-07-10 | 1995-01-25 | Shaw John Ltd | Fibre reinforced plastic composites |
EP0726127A1 (en) * | 1995-02-02 | 1996-08-14 | Hüls Aktiengesellschaft | Moulds for forming latex foam articles using microwave energy |
WO2008128527A2 (en) | 2007-04-23 | 2008-10-30 | InKraft, Ingenieurgesellschaft für kraftgeregelte adaptive Fertigungstechnik mbH | Method for shaping profiles of unidirectional fibre reinforced composite materials during the production process |
WO2008128527A3 (en) * | 2007-04-23 | 2009-11-26 | InKraft, Ingenieurgesellschaft für kraftgeregelte adaptive Fertigungstechnik mbH | Method for shaping profiles of unidirectional fibre reinforced composite materials during the production process |
WO2011073433A1 (en) * | 2009-12-17 | 2011-06-23 | Sgl Carbon Se | Method for producing fiber composite structures, including microwave curing step, and fiber composite structure thereby obtained |
CN102729313A (en) * | 2011-04-11 | 2012-10-17 | 李苏扬 | Extrusion equipment provided with microwave heating device for plant fiber product |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |