FR2892337A1 - PROCESS FOR MANUFACTURING PARTS, SUCH AS AN ELECTROLYSIS FRAME AND ELECTROLYSIS FRAME OBTAINED BY SAID METHOD - Google Patents
PROCESS FOR MANUFACTURING PARTS, SUCH AS AN ELECTROLYSIS FRAME AND ELECTROLYSIS FRAME OBTAINED BY SAID METHOD Download PDFInfo
- Publication number
- FR2892337A1 FR2892337A1 FR0510828A FR0510828A FR2892337A1 FR 2892337 A1 FR2892337 A1 FR 2892337A1 FR 0510828 A FR0510828 A FR 0510828A FR 0510828 A FR0510828 A FR 0510828A FR 2892337 A1 FR2892337 A1 FR 2892337A1
- Authority
- FR
- France
- Prior art keywords
- electrolysis
- frame
- electrolysis frame
- polymer
- mold
- 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.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
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- 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
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
- B29C67/246—Moulding high reactive monomers or prepolymers, e.g. by reaction injection moulding [RIM], liquid injection moulding [LIM]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0003—Producing profiled members, e.g. beams
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- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
- B29C2045/735—Heating or cooling of the mould heating a mould part and cooling another mould part during moulding
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/38—Polymers of cycloalkenes, e.g. norbornene or cyclopentene
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
La présente invention concerne un procédé de fabrication de pièces, telles qu'un cadre d'électrolyse, ainsi qu'un cadre d'électrolyse obtenu par ledit procédé.Il est caractérisé en ce que ledit cadre et moulé par injection, en moule fermé, d'un polymère liquide pur, non armé et non chargé.The present invention relates to a method of manufacturing parts, such as an electrolysis frame, and an electrolysis frame obtained by said method.It is characterized in that said frame and injection molded, in a closed mold, a pure liquid polymer, unreinforced and unloaded.
Description
La présente invention concerne un procédé de fabrication de pièces, tellesThe present invention relates to a method of manufacturing parts, such as
qu'un cadre d'électrolyse, ainsi qu'un cadre d'électrolyse obtenu par ledit procédé. Lors des procédés d'électrolyse, on utilise classiquement un élément de base constituant une cellule se présentant sous la forme d'un cadre d'électrolyse soumis à une pression importante, notamment supérieure à 5 kg/cm2, et à l'action corrosive du milieu électrolyte à température de l'ordre de 100 C. Actuellement, dans la fabrication des cadres d'électrolyse, il est connu de réaliser des cadres d'électrolyse par moulage en utilisant un mastic à base de résine phénolique de type résol chargée en fibres et autres additifs, tels que notamment le silicate d'aluminium hydraté, kaolin ou autres. Le résol phénolique est une résine liquide, contenant suffisamment de fonctions méthyloles réactives pour permettre à la résine de devenir un solide au cours de réaction ultérieure. Le résol a été employé à l'origine avec des fibres d'amiante, celles-ci améliorant de façon significative la friabilité du polymère. Pour des raisons d'hygiène, et notamment de sécurité, les fibres d'amiante ont été remplacées par des fibres de verre. an electrolysis frame, as well as an electrolysis frame obtained by said method. In electrolysis processes, a base element constituting a cell in the form of an electrolysis frame subjected to a high pressure, in particular greater than 5 kg / cm 2, and to the corrosive action of the electrode, is conventionally used. electrolyte medium at a temperature of the order of 100 C. Currently, in the manufacture of electrolysis frames, it is known to produce electrolysis frames by molding using a phenolic resole resin of the resol type loaded with fibers and other additives, such as in particular hydrated aluminum silicate, kaolin or others. The phenolic resole is a liquid resin, containing sufficient reactive methylol functions to allow the resin to become a solid in the course of subsequent reaction. The resol was originally used with asbestos fibers, which significantly improved the friability of the polymer. For reasons of hygiene, and especially safety, the asbestos fibers have been replaced by glass fibers.
Cela étant, bien que très répandue, une telle solution présente de nombreux inconvénients. Tout d'abord, un premier handicap est dû à la présence des fibres de verre mélangées au polymère, qui réduit la durée de vie des équipements. However, although widespread, such a solution has many disadvantages. Firstly, a first handicap is due to the presence of glass fibers mixed with the polymer, which reduces the life of the equipment.
En outre, la tenue aux chocs est plus faible. Par ailleurs, l'usinage crée, au droit des fibres, des porosités permettant des attaques chimiques. Le but de l'invention est de proposer un procédé de fabrication de pièces, telle qu'un cadre d'électrolyse, qui pallie les inconvénients précités, notamment en ce qui concerne la résistance dudit cadre aux chocs et aux températures supérieures à 120 C. In addition, the impact strength is lower. Moreover, the machining creates, in the right of the fibers, porosities allowing chemical attacks. The object of the invention is to provide a method of manufacturing parts, such as an electrolysis frame, which overcomes the aforementioned drawbacks, in particular with regard to the resistance of said frame shock and at temperatures above 120 C.
Un autre but de l'invention est de proposer un cadre d'électrolyse qui présente une bonne résistance mécanique et chimique, notamment au chlore et à l'acide chlorhydrique. Un autre but de la présente invention est de proposer un cadre 5 d'électrolyse dont l'usinage est facile, même à grande vitesse, sans détérioration particulière des outils, ni de la structure du cadre. D'autres buts et avantages de l'invention apparaîtront au cours de la description qui va suivre, qui n'est donnée qu'à titre indicatif et qui n'a pas pour but de la limiter. 10 La présente invention concerne un procédé de fabrication de pièces, telles qu'un cadre d'électrolyse, notamment pour résister au chlore et à l'acide chlorhydrique. Selon l'invention, ledit cadre, en l'occurrence, est moulé par injection, en moule fermé, d'un polymère liquide pur, non armé et non chargé. 15 La polymérisation d'un tel polymère liquide pur, non armé et non chargé, permet d'obtenir un matériau homogène très résistant aux chocs. Le procédé de la présente invention peut trouver des applications, par exemple pour la fabrication de cadre d'électrolyse, notamment pour résister au chlore et à l'acide chlorhydrique, mais aussi pour 20 la réalisation de pièces de structure, notamment dans les transports, en tant que pare-chocs de véhicule ou encore pour la fabrication de conteneur ou réservoir. Selon un mode particulier de la présente invention, ledit cadre d'électrolyse est obtenu par injection réaction dudit polymère dans ledit moule. 25 Dans ce procédé, appelé RIM (de l'anglais Reaction Injection Moulding), les composants sont injectés et mélangés dans une tête de mélange sous forte pression, puis transférés dans un moule fermé, à basse pression, suivi de la polymérisation du mélange. Avec un tel procédé, il est possible de produire des pièces de 30 grandes dimensions et de formes complexes avec de faibles temps de cycle. Selon l'invention, ledit polymère liquide est injecté à température ambiante dans ledit moule dont une partie est chauffée entre 50 et 70 et l'autre partie est refroidie entre 10 et 20 C. Par exemple, on prévoit un moule présentant une matrice chauffée à environ 60 C et dont le poinçon est refroidi à environ 15 C. Another object of the invention is to provide an electrolysis frame which has good mechanical and chemical resistance, in particular to chlorine and hydrochloric acid. Another object of the present invention is to provide an electrolysis frame 5 whose machining is easy, even at high speed, without particular deterioration of the tools or the structure of the frame. Other aims and advantages of the invention will become apparent from the description which follows, which is given for information only and which is not intended to limit it. The present invention relates to a method of manufacturing parts, such as an electrolysis frame, in particular to resist chlorine and hydrochloric acid. According to the invention, said frame, in this case, is injection molded, in a closed mold, of a pure liquid polymer, unreinforced and unloaded. The polymerization of such a pure liquid polymer, unreinforced and unloaded, provides a homogeneous material highly impact resistant. The process of the present invention can find applications, for example for the manufacture of electrolysis frames, in particular to resist chlorine and hydrochloric acid, but also for the production of structural parts, especially in transport, as a vehicle bumper or for the manufacture of a container or tank. According to a particular embodiment of the present invention, said electrolysis frame is obtained by reaction injection of said polymer into said mold. In this process, called RIM (Reaction Injection Molding), the components are injected and mixed in a high-pressure mixing head, then transferred to a closed mold at low pressure, followed by polymerization of the mixture. With such a process it is possible to produce large and complex shapes with low cycle times. According to the invention, said liquid polymer is injected at ambient temperature into said mold, part of which is heated between 50 and 70 and the other part is cooled to between 10 and 20 ° C. For example, a mold having a heated matrix is provided. about 60 C and whose punch is cooled to about 15 C.
L'écoulement du mélange polymérisable à l'intérieur du moule doit être laminaire et on régule la température afin de maintenir une différence de températures entre les deux parties du moule. Cette différence est nécessaire pour maîtriser, et orienter la polymérisation et pour obtenir une qualité de surface prête à usiner. The flow of the polymerizable mixture into the mold must be laminar and the temperature is controlled to maintain a temperature difference between the two mold parts. This difference is necessary to control and guide the polymerization and to obtain a surface quality ready to be machined.
Grâce au procédé de la présente invention, on évite que le retrait de la matière ne se fasse de façon irrégulière, qui se traduirait par des vides en forme de feuilletage, préjudiciables lors de l'usinage. Au contraire, selon l'invention, le retrait est totalement maîtrisé et le coeur du produit moulé n'est pas feuilleté et ne présente pas de porosités. With the method of the present invention, it avoids that the withdrawal of the material is done in an irregular manner, which would result in voids in the form of lamination, detrimental during machining. On the contrary, according to the invention, the shrinkage is completely controlled and the core of the molded product is not laminated and has no porosity.
Selon un mode particulier de la présente invention, ledit polymère constituant ledit cadre d'électrolyse est obtenu à partir du dicyclopentadiène. Selon la présente invention, le polymère constituant ledit cadre d'électrolyse est le polydicyclopentadiène (PDCPD) obtenu à partir du 20 dicyclopentadiène par réaction de métathèse. Plus particulièrement, le polydicyclopentadiène est fabriqué par polymérisation par métathèse et ouverture des cycles ROMP, (de l'anglais Ring Opening Metathese Polymeration). Contrairement aux autres polymères thermodurcissables, 25 comme les polyuréthanes, les époxydes ou les polyesters insaturés, dans lesquels les propriétés de polymère dépendent des structures des prépolymères, le polymère de polydicyclopentadiène offre un matériau homogène dont les caractéristiques sont liées à celles du monomère. La résistance aux chocs du polydicyclopentadiène est excellente, ce qui est dû à 30 la réticulation des chaînes de polymères. Les caractéristiques de ce polymère (PDCPD) sont résumées au tableau ci-dessous : Propriétés Valeur Densité 1,03 g/cm3 Résistance à la traction 45 g/cm3 Module d'élasticité en traction 1930 N/mm2 Résistance au choc izod 3,3 J/cm à 25 C 1,3 J/cm à -40 C 4% Elongation à l'amorce de rupture 25 0/0 Elongation à la rupture 165 C Température de transition vitreuse Température de déformation à la chaleur/charge 1,85 115 C N/mm2 Coefficient de dilatation linéaire 32.10E3K' Constante diélectrique (à 1 MHz) 2,66 Facteur de dissipation (à 1 MHz) 3,15.10-3 Absorption d'eau (3 mois 105 C) 0,05 0/0 Un autre avantage du polymère polydicyclopentadiène est le fait qu'il n'a pas besoin d'agent démoulant, car il est de nature polyoléfinique. According to a particular embodiment of the present invention, said polymer constituting said electrolysis framework is obtained from dicyclopentadiene. According to the present invention, the polymer constituting said electrolysis framework is polydicyclopentadiene (PDCPD) obtained from dicyclopentadiene by metathesis reaction. More particularly, polydicyclopentadiene is made by metathesis and ring opening polymerization (Ring Opening Metathesis Polymeration). Unlike other thermosetting polymers, such as polyurethanes, epoxides or unsaturated polyesters, in which the polymer properties depend on the prepolymer structures, the polydicyclopentadiene polymer provides a homogeneous material whose characteristics are related to those of the monomer. The impact resistance of polydicyclopentadiene is excellent, due to the crosslinking of the polymer chains. The characteristics of this polymer (PDCPD) are summarized in the table below: Properties Value Density 1.03 g / cm3 Tensile strength 45 g / cm3 Modulus of elasticity in tension 1930 N / mm2 Impact resistance izod 3.3 J / cm at 25 C 1.3 J / cm at -40 C 4% Elongation at breakout 25 0/0 Elongation at break 165 C Glass transition temperature Heat distortion temperature / load 1.85 115 CN / mm2 Linear Expansion Coefficient 32.10E3K 'Dielectric constant (at 1 MHz) 2.66 Dissipation factor (at 1 MHz) 3.15.10-3 Water absorption (3 months 105 C) 0.05 0/0 Another advantage of the polydicyclopentadiene polymer is that it does not require a release agent because it is of a polyolefinic nature.
Par ailleurs, ce type de polymère présente l'avantage supplémentaire d'un matériau isotrope en raison de l'absence des renforts, de type fibres, ou charges minérales. Une fois le cadre d'électrolyse obtenu, celui-ci peut être usiné à grande vitesse afin de lui donner sa géométrie définitive, sans détérioration particulière des outils. On peut ainsi réaliser des nervures, des variations d'épaisseur de 2 mm à plusieurs centimètres, des perçages selon les exigences de rigidité et de fonctionnalité. La présente invention concerne en outre un cadre d'électrolyse, notamment pour résister au chlore et à l'acide chlorhydrique, 15 obtenu selon le procédé décrit ci-dessus. Ce cadre peut être constitué d'une seule pièce, donc monolithique. Moreover, this type of polymer has the additional advantage of an isotropic material because of the absence of reinforcements, fiber type, or mineral fillers. Once the electrolysis frame obtained, it can be machined at high speed to give it its final geometry, without particular deterioration tools. It is thus possible to make ribs, variations in thickness from 2 mm to several centimeters, holes according to the requirements of rigidity and functionality. The present invention further relates to an electrolysis frame, in particular for resisting chlorine and hydrochloric acid, obtained according to the method described above. This frame can consist of a single piece, so monolithic.
4 5 10 En effet, le polydicyclopentadiène (PDCPD) est un polymère apte à être utilisé pour réaliser des objets d'une seule pièce. Ce polymère présente en outre une bonne tenue aux chocs à basse température et à haute température, en général supérieure à 120 C. Selon un mode particulier de la présente invention, on peut obtenir un cadre d'électrolyse, tel que décrit dans la présente invention, présentant une épaisseur de 10 cm au moulage, une largeur et une longueur de l'ordre de 2 mètres, présentant une bonne homogénéité dans la masse, sans feuilletage. Naturellement, d'autres modes de mise en oeuvre, à la portée de l'homme de l'art, auraient pu être envisagés sans pour autant sortir du cadre de la présente invention.Indeed, polydicyclopentadiene (PDCPD) is a polymer suitable for use in making one-piece objects. This polymer also has good low temperature and high temperature impact resistance, generally greater than 120 ° C. According to one particular embodiment of the present invention, it is possible to obtain an electrolysis frame, as described in the present invention. , having a thickness of 10 cm at molding, a width and a length of the order of 2 meters, having a good homogeneity in the mass, without lamination. Of course, other modes of implementation, within the reach of those skilled in the art, could have been envisaged without departing from the scope of the present invention.
Claims (9)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0510828A FR2892337B1 (en) | 2005-10-24 | 2005-10-24 | PROCESS FOR MANUFACTURING PARTS, SUCH AS AN ELECTROLYSIS FRAME AND ELECTROLYSIS FRAME OBTAINED BY SAID METHOD |
| DE102006050281A DE102006050281A1 (en) | 2005-10-24 | 2006-10-23 | Electrolysis frame manufacturing method involves reaction injection molding of a pure, non-filled liquid polymer in closed tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0510828A FR2892337B1 (en) | 2005-10-24 | 2005-10-24 | PROCESS FOR MANUFACTURING PARTS, SUCH AS AN ELECTROLYSIS FRAME AND ELECTROLYSIS FRAME OBTAINED BY SAID METHOD |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2892337A1 true FR2892337A1 (en) | 2007-04-27 |
| FR2892337B1 FR2892337B1 (en) | 2009-03-06 |
Family
ID=36376026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0510828A Active FR2892337B1 (en) | 2005-10-24 | 2005-10-24 | PROCESS FOR MANUFACTURING PARTS, SUCH AS AN ELECTROLYSIS FRAME AND ELECTROLYSIS FRAME OBTAINED BY SAID METHOD |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102006050281A1 (en) |
| FR (1) | FR2892337B1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4274939A (en) * | 1979-04-20 | 1981-06-23 | Svenska Utvecklingsaktiebolaget (Su) Swedish National Development Co. | Electrode package and use thereof |
| EP0335264A2 (en) * | 1988-03-29 | 1989-10-04 | Nippon Zeon Kabushiki Kaisha | Composite material and process for preparation thereof |
| EP0600086A1 (en) * | 1991-08-12 | 1994-06-08 | Nippon Zeon Co., Ltd. | Injection-molded thermoplastic saturated norbornene resin, substrate of information medium element made therefrom, and information medium element |
| WO1995015214A1 (en) * | 1993-12-02 | 1995-06-08 | Telenor S.A. | Structure element of a device for the treatment of corrosive materials in heat and stress conditions |
| US20020005362A1 (en) * | 1998-08-11 | 2002-01-17 | Eltech Systems Corporation | Spiral feed and discharge manifold for electrolytic cells |
| DE102004002385A1 (en) * | 2004-01-15 | 2005-08-11 | Weiss Kunststofftechnik Gmbh | Composite film and plastic product manufacture involves molding plastic directly onto formed plastic film in tool where bond is created without use of additional adhesive |
-
2005
- 2005-10-24 FR FR0510828A patent/FR2892337B1/en active Active
-
2006
- 2006-10-23 DE DE102006050281A patent/DE102006050281A1/en not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4274939A (en) * | 1979-04-20 | 1981-06-23 | Svenska Utvecklingsaktiebolaget (Su) Swedish National Development Co. | Electrode package and use thereof |
| EP0335264A2 (en) * | 1988-03-29 | 1989-10-04 | Nippon Zeon Kabushiki Kaisha | Composite material and process for preparation thereof |
| EP0600086A1 (en) * | 1991-08-12 | 1994-06-08 | Nippon Zeon Co., Ltd. | Injection-molded thermoplastic saturated norbornene resin, substrate of information medium element made therefrom, and information medium element |
| WO1995015214A1 (en) * | 1993-12-02 | 1995-06-08 | Telenor S.A. | Structure element of a device for the treatment of corrosive materials in heat and stress conditions |
| US20020005362A1 (en) * | 1998-08-11 | 2002-01-17 | Eltech Systems Corporation | Spiral feed and discharge manifold for electrolytic cells |
| DE102004002385A1 (en) * | 2004-01-15 | 2005-08-11 | Weiss Kunststofftechnik Gmbh | Composite film and plastic product manufacture involves molding plastic directly onto formed plastic film in tool where bond is created without use of additional adhesive |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2892337B1 (en) | 2009-03-06 |
| DE102006050281A1 (en) | 2007-04-26 |
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