BE677980A - - Google Patents

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Publication number
BE677980A
BE677980A BE677980DA BE677980A BE 677980 A BE677980 A BE 677980A BE 677980D A BE677980D A BE 677980DA BE 677980 A BE677980 A BE 677980A
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BE
Belgium
Prior art keywords
post
blowing
fixing means
mold
desired color
Prior art date
Application number
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French (fr)
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Publication of BE677980A publication Critical patent/BE677980A/fr

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00Rigid pipes
    • F16L9/12Rigid pipes of plastics with or without reinforcement
    • F16L9/127Rigid pipes of plastics with or without reinforcement the walls consisting of a single layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001Combinations of extrusion moulding with other shaping operations
    • B29C48/0017Combinations of extrusion moulding with other shaping operations combined with blow-moulding or thermoforming
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/04Extrusion blow-moulding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/04Extrusion blow-moulding
    • B29C49/041Extrusion blow-moulding using an accumulator head
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/20Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01FADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/60Upright bodies, e.g. marker posts or bollards; Supports for road signs
    • E01F9/604Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings
    • E01F9/608Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings for guiding, warning or controlling traffic, e.g. delineator posts or milestones
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01FADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/60Upright bodies, e.g. marker posts or bollards; Supports for road signs
    • E01F9/604Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings
    • E01F9/619Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings with reflectors; with means for keeping reflectors clean
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00Rigid pipes
    • F16L9/006Rigid pipes specially profiled
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/20Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
    • B29C2049/2017Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements outside the article
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5324Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7371General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable
    • B29C66/73715General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable heat-shrinkable
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/766Poles, masts, posts

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Package Frames And Binding Bands (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Description

       

   <Desc/Clms Page number 1> 
 



  "Poteau tubulaire de direction, de   balisage   ou de limi- tation en matière synthétique thermoplastique et appa- reil pour sa fabrication." 
L'invention a pour objet un poteau tubulaire de direction, de balisage ou de limitation en matière synthé- tique thermoplastique et un appareil pour sa fabrication. 



   On connaît déjà des poteaux en matière synthétique thermoplastique du type défini que l'on installe notamment au bord des routes et en des endroits similaires. Le plus souvent, on les fabrique par extrusion d'un tube que l'on subdivise pour obtenir les poteaux individuels de longueur appropriée. Les pièces brutes ainsi obtenues doivent encore subir différents traitements. ainsi en général, il est nécessaire de fraiser des évidements, des creux,   etc...   

 <Desc/Clms Page number 2> 

 dans lesquelson insère des réflecteur  ou accessiores simi laires   En   outre, il est   nécessaire   de fermer au Moine 1'ex        trémité   supérieure d'un poteau de ce genre en y insérant un      bouchon ouen y posant un chapeau.

   De plus, dans ces poteaux connus, il est difficile de disposer des éléments quelconque., par exemple les réflecteurs mentionnés, de façon telle   qu'ils   ne se perdent pas lors du transport ou d'opérations   similaire  **'   Cela provient notamment du fait qu'à moins d'utiliser des moyens spéciaux, il n'est pas possible d'assembler durablement et solidement au poteau des éléments quelconques après coup, c'est-à-dire après la fin du formage et lorsque la matière thermoplastique est   refroidie.   



   L'invention a pour but d'éviter les inconvénients inhérente aux poteaux connus. Elle vise, en particulier, bier que non exclusivement, à simplifier la fabrication de façon telle qu'après le formage de la matière thermoplastique, de après le refroidissement de   celle-ci,   un travail minime s ise à terminer complètement le poteau de limitation* 
Pour résoudre ce problème, l'invention propose ue le poteau soit fabriqua par soufflage   à   partir d'un   de : -   produit en forme de gaine ou de feuille. A cet effet, n utilise avantageusement un moule creux en lui-même cn éventuellement muni de tranchants, dans lequel pénètrele conduit d'amenée d'agent de   pression,   de préférence au   poin-   çon de soufflage. 



   Il est évident qu'un   pot).u   fabriqué de cette façon est fermé à l'avance, au moine à son extrémité supé rieure, de sorte qu'il n'est pas cessaire d'appliquer après coup un bouchon ou un chapeau en une opération spéciale. Mais, en outre, il est possible aussi, lorsqu'on fabrique le poteau dans le moule de soufflage, de   1  munir en creux, évidements, etc. servant à recevoir des   réfl.   leurs ou accessoires 

 <Desc/Clms Page number 3> 

 similaires. Ainsi, les opérations spéciales de coupage ou de fraisage qui sont nécessaires dansles poteaux connus devien- nent superflues* 
Il est possible aussi de munir le poteau de moyens de fixation, par exemple d'écrous filetés, etc. que l'on place dans le moule avant le soufflage du poteau et qui sont assemblée au poteau lors du soufflage.

   Ces moyen? de fixation   facilitent   très notablement la mise en place des réflecteurs et accessoires similaires car il suffit que ces derniers soient munis d'un petit prolongement fileté pouvant se visser dans l'écrou. Ici encore, le point important est que la mise en place de ces moyens de fixation, par exemple des écroue   filetés,   ne nécessite pas d'opération spéciale. Il suffit de placer les   éorous   ou organes milaires dans le moule avant le processus de soufflage. 



   D'autre part, ces   moyens   de fixation peuvent   éven-   tuellement être formés d'une   malgré   qui peut se souder à la matière formant le poteau. En out il est possible aussi que les moyens de fixation présentent - éventuellement en supplément*- sur leurs surfaces de ctat avec le poteau, des inégalités, par exemple des rai ec dépouillées, des creux, des saillies, etc.auxquel 1 paroi du poteau   s'adapte,   lorsqu'on la forme par soufage de façon telle que les moyens de fixation sont   reliés (fermement   au poteau. 



   Dans le cas de poteaux de dition; de   balisage   ou de limitation, indépendamment de leur mide de fabrication, il est généralement usuel ou même nécesire de les munir de bandes transversales, ou, éventuellemtn, obliques, présen tant une autre couleur que le reste du poteau qui   est   généra- lement blanc.

   Suivant une autre proposition de   1 t invention,   pour réaliser cette tande de coloration différente - ou éven- 

 <Desc/Clms Page number 4> 

 tuellement plus   Jure   de ces bandes- le poteau peut   tire     formé        de deux ou plusurs demi-produite de préférence en forme de gaines, de colo tion différente, dis posée concentriquement   l'un à     l'autre, ,   sorte que l'on obtient un poteau dont la paroi est formée, ans sa section, de plusieurs couches de couleur différant .

   Dans une ou plusieurs régions du poteau, on peut enlever un ou plusieurs des couches externes de manière à rendre visible une couche présentant la couleur qui est désirée dans   cette   région   représentant   la bande   mentionnée.   



   Suivant une autre proposition de l'invention, une autre possibilité permettant de réaliser une ou plusieurs bandes dont la   couleur se   distingue du reste du poteau consiste à prévoir, dans la ou 'es régions partielles   qu.        doivent présenter a couleur différente, une manchette de matière plastique colorie de façon correspondante et   a vanta-        geusement soudée au poteau. Avantageusement, on introduit la manchette dans le moule avant ?.e soufflage et, lors du soufflage, on la soude au poteau de aorte que l'on peut      retirer du moule de soufflage le poteau déjà muni de cette bande colorée. 



   Pour réaliser la région de coloration différente du poteau, donc la bande, il est possible aussi de disposer un tube fretté de coloration différente, également formé de matière synthétique, que l'on glisse par-dessus la partie destinée à recevoir la bande et que l'on resserre alors sur le poteau par une action thermique. Cette partie frettéeeut aussi être considérée comme une manchette qui entoure le poteau, mais, contrairement à la possibilité mentionnée plus haut, cette manchette est frettée et non assemblée par   L)udage..        



   Enfin, il est possible aussi de fabriquer les   jandea   en peignant le poteau. 

 <Desc/Clms Page number 5> 

 



   De toutes les possibilités citées, la plue avan- tageuse sera généralement celle dans laquelle on soude la manchette au poteau à l'intérieur du moule de soufflage pour réaliser la bande. D'une part, ce mode de fabrication est simple et économique. D'autre part, il assure que la couleur formant la bande ne puisse en aucun cas pâlir ou même dispa-   raître   sous   l'action   des intempéries, car la manchette formée de matière synthétique présente cette coloration sur toute son épaisseur. Il est vrai qu'il est assez simple d'appliquer une peinture. Toutefois, il est alors nécessaire de renouveler cette peinture à intervalles réguliers. 



   En tout cas, il peut être avantageux que la région qui porte la manchette ou le tube fretté ou la'peinture présente extérieurement une différence de niveau, de préfé- rence un rétrécissement, par rapport aux autres parties non recouvertes ou non peintes du poteau. 



   Lorsque le poteau sort du moule de soufflage, il est généralement fermé, même à son extrémité inférieure que l'on enfonce dans le sol, à part une petite ouverture à travers laquelle le poinçon de soufflage ou organe similaire pénètre dans le demi-produit ou le poteau pendant le proces- sus de démoulage. S'il est nécessaire ou avantageux d'utili- ser un poteau dont l'extrémité inférieure soit ouverte, il suffit de couper l'extrémité inférieure, tout d'abord fermé  du poteau. Cela   n'entraîne   pas d'effort particulier. Il peut, par exemple, être avantageux d'utiliser un poteau ouvert dans le bas lorsque le poteau est inséré dans un socle ou une fondation en béton, comme il est généralement usuel.

   Avec le temps, notamment avant l'insertion d'un poteau, l'évidement prévu dans le socle de béton pour l'extrémité inférieure du poteau peut se combler partiellement de matériaux quelconques, de cailloux, de terre, de débris, etc...Lorsque l'extrémité 

 <Desc/Clms Page number 6> 

 inférieure du poteau est   ouverts,   il est généralement possible de l'introduire dans   l'évidement   du   socle   malgré les matières qui s'y   trouvent,   de sorte qu'il est   superflu   de nettoyer préalablement cet éviement 
Enfin,

     suivant   une autre porpositoion de d'inventin il est possible aussi de donner simplement au poteau la   forte   d'un revêtement pour un poteau ou élément   similaire     fabrique   par exemple en boit. En pareil   cas,   il   n'est   pas   nécessaire   que le poteau se soutienne de   lui-même,   de sort* que   l'on   peut lui donner une   aroi   d'autant plue   Mince*   101   encore,   l'application du   procède   de soufflage   Constitue   un   avantage   particulier en ce   sens   que seul il permet de   réaliser    ou du moins de réaliser économiquement;

   de tels   revêtement*.   



  En appliquant le procédé usuel   d'extrusion,   il ne   serait   guère   posa.. /le   de réaliser des revêtements présentant une épaisseur de paroi   assez   faible pour que la   fabrication     soit   rentable.

     les     revêtements   de ce genre sont avantageux en particulier dans le   cas   de poteaux en   bois,   car   ils     protègent     ceux-ci   contre l'action des   intempéries.   En outre, il n'est pas   nécessaire   de   peindre   les poteaux en   bois    ni de   loue   appliquer un autre traitement, car le   revêtement     peut     avoir   la couleur appropriée.

   En outre, celui-ci peut   aussi   porter les réflecteurs et   autres     éléments*     Ainsi  il n'est   pratique*   ment   plu.s   nécessaire d'appliquer une   finition   au poteau de bois ou d'autre matière.   On   peut   utilise?   un poteau   relative    ment brut coupé à la   dimension.   



     On   a représenté sur le dessin un exemple de réali nation de l'inventions la figure 1 est   l'élévation   latérale d'un poteau de limitation de route, la figure 2 est l'élévation de face   correspondance,   

 <Desc/Clms Page number 7> 

 la figure 3 est une coupe suivant la ligne-3 de la figure 2, la figure 4 est une perspective de l'extrémité inférieure du poteau après sa fabrication dans le moule de soufflage, la figure 5 est une vue correspondant à la figure   4   et montrant un poteau ouvert dans le bas. 



   Le poteau 10 représenté par le dessin est d'une seule pièce et fabriqué par soufflage. A cet effet, on extrude avantageusement une gaine à l'aide d'une extrudeuse en la faisant arriver entre les deux moitiés d'un moule de soufflage dans lequel une filière de soufflage pénètre par le bas. Aussitôt que la gaine a atteint la longueur nécessaire à la fabrication d'un poteau 10, on ferme le moule. Par la filière, on introduit à l'intérieur du moule et de la gaine qu'il contient un agent de pression, de préférence de l'air comprimé, de sorte que la gaine s'élargit et .'applique contre la paroi du moule. Après refroidissement de la matière, on ouvre le moule.

   On peut retirer le poteau représenté sur le dessin et qui, comme le montre la figure 1, est fermé à son extrémité inférieure en 11 à l'exception d'une ouverture 12 par laquelle le poinçon pénètre dans le poteau 10. 



   A son extrémité supérieure, en 13 le poteau 10 est complètement fermé de sorte qu'il n'est pas nécessaire d'y disposer un bouchon ni un chapeau. Le moule de soufflage est de structure telle que les parois limitant la cavité de moule présentent des saillies ou agencements similaires qui servent à former des creux 14 et 15. Dans ces creux, on peut insérer après coup des réflecteurs. Pour fixer ceux-ci, des écrous filetés 16 sont insérée dans la matière thermoplastique qui forme le poteau 10. On insère ces écroue dans le moule avant d'élargir le demi-produit tubulaire et ils sont reliée      

 <Desc/Clms Page number 8> 

 à la matière thermoplastique pendant le processus d'élar- gissement. Ainsi, on peut fixer les   réfleoteure   de façon simple et peu coûteuse.

   Il suffit qu'ils présentent à      l'arrière un petit goujon fileté qui peut se visser dans l'écrou 16. le poteau 10 représenté par le dessin peut   être   d'une seule couleur lorsqu'on le retire du moule et il est,      en général, d'une couleur claire, de préférence, blanche. 



  Si l'on veut de façon usuelle le munir d'une bande   transver- ,   sale colorée, par exemple noire, qui est un peu oblique dans l'exemple représenté, la   région. 17   du poteau 10, entre les deux bords 18 et 19, est   un peu   rétreinte pour faciliter la mise en place d'une telle bande. On obtient également ce rétreint en donnant une forme correspondante à la cavité de moule. Ainsi, il   n't   en aucun cas nécessaire de prévoir après coup des fraisages, etc...      



   Les manchettes ou les tronçons de tube frettés mentionnés plus haut ou, éventuellement aussi la peinture sont donc placés dans cette zone rétreinte entre les bords 
18 et 19. Quand on utilise la manchette destinée à être soudée à l'intérieur du moule, le rétreint entre les deux bords 18 et 19 est évidemment déjà rempli par cette manchette au moment où l'on retire du moule le poteau 10. La manchette est avantageusement munie de perforations dont les dimensions correspondent à l'extension des creux 14 et 15. Ainsi, la région dans laquelle on insère les réflecteurs n'est pas recouverte par la manchette. 



   Si l'extrémité inférieure du poteau doit être ouverte comme le montre la figure 5, il est nécessaire de séparer l'extrémité inférieureavec la partie 11 (figure   4).   



   On a déjà signalé que, pour fabriquer le poteau, on peut introduire entre les deux moitiés d'un moule de 

 <Desc/Clms Page number 9> 

 soufflage ouvert un tuyau provenant d'une extrudeuse* En pareil cas, il est avantageux d'utiliser des dispositifs qui présentent une tête d'accumulation (ttte de réserve)* La matière nécessaire à la fabrication d'un poteau   cet   éjectée d'une presse à vis en une seule opération par un piston ou organe similaire.

   L'avantage en est que l'éjection de la longueur de gaine voulue se fait relativement vite, de aorte que la gaine suspendue à la filière n'a guère la possibilité de   s'allonger   avant que le moule ne   se   ferme* 
Bien entendu, au lieu d'un morceau de gaine, il est possible aussi d'utiliser des   feuilles*   En outre, si cela est avantageux pour une raison quelconque, on peut aussi partir de préformes froides.



   <Desc / Clms Page number 1>
 



  "Tubular post of direction, beaconing or limitation in thermoplastic synthetic material and apparatus for its manufacture."
The subject of the invention is a tubular directional, beaconing or limiting post made of thermoplastic synthetic material and an apparatus for its manufacture.



   There are already known thermoplastic synthetic material poles of the defined type which are installed in particular at the side of roads and in similar places. Most often, they are made by extruding a tube which is subdivided into individual posts of the appropriate length. The raw parts thus obtained must still undergo various treatments. thus in general it is necessary to mill recesses, hollows, etc.

 <Desc / Clms Page number 2>

 in which reflector or similar accessories are inserted. In addition, it is necessary to close the upper end of a post of this kind at the Monk by inserting a cap or putting a cap on it.

   In addition, in these known posts, it is difficult to arrange any elements, for example the reflectors mentioned, in such a way that they do not get lost during transport or similar operations ** 'This is due in particular to the fact that unless special means are used, it is not possible to permanently and securely assemble any elements to the post afterwards, that is to say after the end of the forming and when the thermoplastic material has cooled .



   The object of the invention is to avoid the drawbacks inherent in known posts. It aims, in particular, but not exclusively, to simplify the manufacture in such a way that after the forming of the thermoplastic material, after cooling of the latter, minimal work is required to completely complete the limiting post *
To solve this problem, the invention proposes that the post is manufactured by blowing from one of: - product in the form of a sheath or sheet. For this purpose, advantageously uses a hollow mold in itself cn optionally provided with cutting edges, into which penetrates the conduit for supplying the pressure agent, preferably at the blowing punch.



   Obviously, a jar made in this way is closed in advance, to the monk at its upper end, so that it is not necessary to apply a stopper or a plastic cap afterwards. a special operation. But, in addition, it is also possible, when manufacturing the post in the blow mold, to provide recesses, recesses, etc. used to receive refl. their or accessories

 <Desc / Clms Page number 3>

 similar. Thus, the special cutting or milling operations which are necessary in known columns become superfluous *
It is also possible to provide the post with fixing means, for example threaded nuts, etc. which is placed in the mold before the post is blown and which are assembled to the post during the blowing.

   These means? mounting brackets greatly facilitate the installation of reflectors and similar accessories because it is sufficient that the latter are provided with a small threaded extension that can be screwed into the nut. Here again, the important point is that the installation of these fixing means, for example threaded nuts, does not require any special operation. It is sufficient to place the ears or milaria organs in the mold before the blowing process.



   On the other hand, these fixing means can optionally be formed of a despite which can be welded to the material forming the post. In addition, it is also possible that the fastening means present - possibly as a supplement * - on their side surfaces with the post, unevenness, for example stripped grooves, hollows, projections, etc. in which the wall of the post adapts, when shaped by blowing in such a way that the fixing means are connected (firmly to the post.



   In the case of editing posts; markup or limitation, regardless of their method of manufacture, it is generally customary or even necessary to provide them with transverse bands, or, possibly, oblique, presenting a different color than the rest of the post which is generally white.

   According to another proposal of 1 t invention, to achieve this tand of different coloring - or possibly

 <Desc / Clms Page number 4>

 tally more of these bands- the post can be formed of two or more semi-finished products, preferably in the form of sheaths, of different colo tion, arranged concentrically to each other, so that one obtains a post whose wall is formed, in its section, of several layers of different colors.

   In one or more regions of the post, one or more of the outer layers may be removed so as to make visible a layer having the color which is desired in that region representing the mentioned strip.



   According to another proposal of the invention, another possibility making it possible to produce one or more bands the color of which differs from the rest of the post is to provide, in the partial region or regions. must have a different color, a correspondingly colored plastic sleeve which has been welded to the post. Advantageously, the sleeve is introduced into the mold before blowing and, during blowing, it is welded to the aorta post which can be removed from the blow mold the post already provided with this colored strip.



   To achieve the region of different coloring of the post, therefore the strip, it is also possible to have a hooped tube of different coloring, also formed of synthetic material, which is slipped over the part intended to receive the strip and that one then tightens on the post by a thermal action. This hooped part could also be considered as a cuff which surrounds the post, but, contrary to the possibility mentioned above, this cuff is hooped and not assembled by L) udage.



   Finally, it is also possible to make the jandea by painting the post.

 <Desc / Clms Page number 5>

 



   Of all the possibilities mentioned, the most advantageous will generally be that in which the sleeve is welded to the post inside the blow mold to make the strip. On the one hand, this manufacturing method is simple and economical. On the other hand, it ensures that the color forming the strip cannot in any case fade or even disappear under the action of bad weather, because the sleeve formed of synthetic material has this coloring over its entire thickness. It is true that it is quite simple to apply a paint. However, it is then necessary to renew this paint at regular intervals.



   In any event, it may be advantageous that the region which carries the cuff or the hooped tube or the paint has an outwardly difference in level, preferably a narrowing, with respect to the other uncovered or unpainted parts of the post.



   When the post comes out of the blow mold, it is usually closed, even at its lower end which is driven into the ground, apart from a small opening through which the blow mold or similar member enters the semi-finished product or the post during the demoulding process. If it is necessary or advantageous to use a post with the lower end open, it is sufficient to cut the lower end, first closed, of the post. This does not entail any particular effort. It may, for example, be advantageous to use a post open at the bottom when the post is inserted into a concrete plinth or foundation, as is generally usual.

   Over time, especially before the insertion of a post, the recess provided in the concrete base for the lower end of the post may partially fill with any materials, stones, earth, debris, etc. .When the end

 <Desc / Clms Page number 6>

 bottom of the post are open, it is generally possible to introduce it into the recess of the base despite the materials therein, so that it is superfluous to clean this recess beforehand
Finally,

     according to another porpositoion of inventin it is also possible to simply give the post the strength of a coating for a post or similar element made for example in wood. In such a case, it is not necessary for the post to support itself, so as to be able to give it an even greater aroi Thin * 101 again, the application of the blowing procedure constitutes a particular advantage in the sense that only it makes it possible to achieve or at least to achieve economically;

   such coating *.



  By applying the usual extrusion process, it would hardly be possible to produce coatings having a wall thickness small enough for the manufacture to be profitable.

     coverings of this type are advantageous in particular in the case of wooden posts, since they protect the latter against the action of bad weather. Also, there is no need to paint the wood poles or rent to apply any other treatment, as the coating can be the appropriate color.

   In addition, it can also carry reflectors and other elements * So it is hardly necessary to apply a finish to the post of wood or other material. Can we use? a relatively raw post cut to size.



     An exemplary embodiment of the invention has been shown in the drawing; Figure 1 is the side elevation of a road restriction post, Figure 2 is the corresponding face elevation,

 <Desc / Clms Page number 7>

 Figure 3 is a section taken along line-3 of Figure 2, Figure 4 is a perspective of the lower end of the post after its manufacture in the blow mold, Figure 5 is a view corresponding to Figure 4 and showing a post open at the bottom.



   The post 10 represented by the drawing is in one piece and manufactured by blowing. To this end, a sheath is advantageously extruded using an extruder by making it arrive between the two halves of a blow mold into which a blow die enters from the bottom. As soon as the sheath has reached the length necessary for the manufacture of a post 10, the mold is closed. Through the die, a pressure agent, preferably compressed air, is introduced into the interior of the mold and of the sheath that it contains, so that the sheath widens and is applied against the wall of the mold. . After cooling the material, the mold is opened.

   The post shown in the drawing can be removed and which, as shown in Figure 1, is closed at its lower end at 11 except for an opening 12 through which the punch enters the post 10.



   At its upper end, at 13, post 10 is completely closed so that it is not necessary to place a cap or a cap therein. The blow mold is of a structure such that the walls limiting the mold cavity have projections or similar arrangements which serve to form the recesses 14 and 15. In these recesses, reflectors can be inserted afterwards. To fix these, threaded nuts 16 are inserted into the thermoplastic material which forms the post 10. These nuts are inserted into the mold before expanding the tubular semi-finished product and they are connected.

 <Desc / Clms Page number 8>

 to the thermoplastic material during the enlargement process. Thus, we can fix the refleoteure in a simple and inexpensive way.

   It suffices that they present at the rear a small threaded stud which can be screwed into the nut 16. the post 10 shown in the drawing may be of one color when removed from the mold and it is, in generally a light color, preferably white.



  If one wishes in the usual way to provide it with a transverse colored band, for example black, which is a little oblique in the example shown, the region. 17 of the post 10, between the two edges 18 and 19, is a little narrowed to facilitate the establishment of such a strip. This shrinkage is also obtained by giving a corresponding shape to the mold cavity. Thus, it is in no case necessary to plan after the fact of milling, etc ...



   The sleeves or the shrunken tube sections mentioned above or possibly also the paint are therefore placed in this constricted zone between the edges
18 and 19. When using the sleeve intended to be welded inside the mold, the constriction between the two edges 18 and 19 is obviously already filled by this sleeve when the post 10 is removed from the mold. The cuff is advantageously provided with perforations, the dimensions of which correspond to the extension of the recesses 14 and 15. Thus, the region in which the reflectors are inserted is not covered by the cuff.



   If the lower end of the post is to be opened as shown in figure 5, it is necessary to separate the lower end with part 11 (figure 4).



   It has already been pointed out that, to manufacture the post, it is possible to introduce between the two halves of a mold of

 <Desc / Clms Page number 9>

 open blowing a pipe coming from an extruder * In such a case, it is advantageous to use devices which have an accumulation head (reserve head) * The material necessary for the manufacture of a post is ejected from a screw press in a single operation by a piston or the like.

   The advantage of this is that the ejection of the desired length of sheath is relatively quick, so that the sheath suspended from the die has little opportunity to lengthen before the mold closes *
Of course, instead of a piece of sheath, it is also possible to use foils. In addition, if this is advantageous for some reason, it is also possible to start from cold preforms.


    

Claims (1)

RESUME. ABSTRACT. 1) Poteau tubulaire de direction, de balisage eu de limitation en matière synthétique thermoplastique remar- quable en ce qu'il est fabriqué par soufflage à partie d'un demi-produit en forme de gaine ou de feuille. 1) Tubular post of direction, of beaconing or limitation in thermoplastic synthetic material remarkable in that it is manufactured by blowing from a semi-finished product in the form of a sheath or sheet. 2) Modes de réalisation comportant l'une au mons des caractéristiques suivantes! a) le poteau est muni de creux, d'évidement etc. servant à recevoir des réflecteurs ou d'autres éléments. b) le poteau eet muni de moyens de fixation,: par exemple d'écroua filetés etc.. que l'on a introduit dans le moule de soufflage avant de souffler le poteau et qui sont réunis à celui-ci lors du soufflage. les moyens de fixation sont disposés dans les creux ou évidements. d) les moyens de fixation sont formés, de manière en elle-même oonnue, d'une matière pouvant se souder à celle qui forme le poteau. 2) Embodiments comprising one of the following features! a) the post is provided with hollows, recesses etc. used to receive reflectors or other elements. b) the post eet provided with fixing means: for example threaded nut etc .. which was introduced into the blow mold before blowing the post and which are joined to it during blowing. the fixing means are arranged in the hollows or recesses. d) the fixing means are formed, in a manner in itself oonnue, of a material which can be welded to that which forms the post. <Desc/Clms Page number 10> e) les moyens de fixation présentent, à leur$ surfaces de contact avec le poteau, des inégalités, par exemple des rainures dépouillées) des creux, des saillies, etc..auxquels la paroi du poteau, s'adapte lorsqu'on la forme par soufflage dans le moule, de façon telle que les moyens de , fixation sont reliés fermement au poteau, f) le poteau est formé par soufflage à partir de deux ou plusieurs demi-produits tubulaires de couleur diffé- rente disposés concentriquement entre eux, donnant ainsi un ; <Desc / Clms Page number 10> e) the fixing means have, at their surfaces in contact with the post, unevenness, for example stripped grooves) hollows, projections, etc. to which the wall of the post adapts when shaped by blowing in the mold, so that the fixing means are firmly connected to the post, f) the post is formed by blowing from two or more tubular semi-products of different color arranged concentrically between them, giving thus one; poteau dont la paroi est formée, dans sa section de plusieurs couches de couleur différente, une ou plusieurs des couches externes étant enlevées dans une ou Plusieurs régions du poteau jusqu'à ce que la couleur désirée dans oette région aoit visible, g) 1a ou les région$ partielles sont entourée* d'une manchette de matière synthétique présentant la couleur désirée* h) la manchette est nouait au poteau* i) post the wall of which is formed, in its section of several layers of different color, one or more of the outer layers being removed in one or more regions of the post until the desired color in this region is visible, g) 1a or the partial $ regions are surrounded * by a synthetic material cuff of the desired color * h) the cuff is tied to the post * i) la manchette est introduite dans le moule avant le soufflage du poteau et se soude à celui-ci lors du soufflage ;)) la région partielle est entourée d'un tronçon de tube fretté présentant la couleur désirée* k) le poteau est peint extérieurement de la couleur désirée dans des régions partielles* 1) la ou les réine à peindre ou à munir d'un revêtement sont dégradée* extérieurement de préférence rétreintes m) le poteau est ouvert à son extrémité inférieure m) le pot eau se soutient de lui-même. o) le poteau sert simplement de revêtement à un. poteau ou élément similaire fabriqué par exemple en bois. the sleeve is introduced into the mold before the post is blown and is welded to it during the blowing;)) the partial region is surrounded by a section of hooped tube having the desired color * k) the post is painted on the outside with the desired color in partial regions * 1) the queen (s) to be painted or provided with a coating are degraded * externally preferably constricted m) the post is open at its lower end m) the water pot is self-supporting. o) the post simply serves as a covering. post or similar element made for example of wood. <Desc/Clms Page number 11> <Desc / Clms Page number 11> 3) Appareil destiné à la fabrication d'un poteau tel que décrit remarquable en ce qu'il est constitué de manière en elle-même connue par un moule creux muni de tran- chante et dans lequel s'avance un conduit d'amenée d'agent de pression constituant de préférence,un poinçon de soufflage*: 1 3) Apparatus intended for the manufacture of a post as described, remarkable in that it is constituted in a manner known per se by a hollow mold provided with an edge and in which a supply duct advances. 'pressure agent preferably constituting a blowing punch *: 1
BE677980D 1965-03-18 1966-03-17 BE677980A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK0055574 1965-03-18

Publications (1)

Publication Number Publication Date
BE677980A true BE677980A (en) 1966-09-01

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ID=7227509

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BE (1) BE677980A (en)
ES (1) ES324321A1 (en)
FR (1) FR1471556A (en)
LU (1) LU50678A1 (en)
NL (1) NL6603137A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2511801A (en) * 2013-03-13 2014-09-17 A Fax Ltd Improved barrier post
FR3119788A1 (en) * 2021-02-18 2022-08-19 Signaux Girod METHOD FOR CASTING A TEMPORARY SIGNALING BEACON

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2201961A1 (en) * 1972-10-11 1974-05-03 Transform Matieres Plast Hollow thermoplastic blow mouldings with leakproof insert - sealed by fusion with insert insert interface during moulding
DE3000355A1 (en) * 1980-01-07 1981-07-09 Wolfgang K. Ing. Altemöller (grad.), 8011 Baldham PLASTIC HOLLOW PROFILE
FR2514797A1 (en) * 1981-10-19 1983-04-22 Allibert Sa Reflective post esp. for roads - comprises peripheral channels which receive edges of thin respective strips

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2511801A (en) * 2013-03-13 2014-09-17 A Fax Ltd Improved barrier post
FR3119788A1 (en) * 2021-02-18 2022-08-19 Signaux Girod METHOD FOR CASTING A TEMPORARY SIGNALING BEACON

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Publication number Publication date
LU50678A1 (en) 1966-05-17
NL6603137A (en) 1966-09-19
FR1471556A (en) 1967-03-03
ES324321A1 (en) 1967-03-16

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