FR2524776A1 - METHOD FOR MANUFACTURING POLYCARBONATE SPORTS HELMETS OR OTHER THERMOPLASTIC MATERIALS - Google Patents
METHOD FOR MANUFACTURING POLYCARBONATE SPORTS HELMETS OR OTHER THERMOPLASTIC MATERIALS Download PDFInfo
- Publication number
- FR2524776A1 FR2524776A1 FR8305407A FR8305407A FR2524776A1 FR 2524776 A1 FR2524776 A1 FR 2524776A1 FR 8305407 A FR8305407 A FR 8305407A FR 8305407 A FR8305407 A FR 8305407A FR 2524776 A1 FR2524776 A1 FR 2524776A1
- Authority
- FR
- France
- Prior art keywords
- parts
- helmets
- molds
- sports helmets
- helmet
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 11
- 229920000515 polycarbonate Polymers 0.000 title abstract description 6
- 239000004417 polycarbonate Substances 0.000 title abstract description 6
- 239000012815 thermoplastic material Substances 0.000 title description 4
- 238000003466 welding Methods 0.000 claims abstract description 8
- 239000003086 colorant Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000004873 anchoring Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229920002994 synthetic fiber Polymers 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 claims 1
- 229920003002 synthetic resin Polymers 0.000 abstract 1
- 239000000057 synthetic resin Substances 0.000 abstract 1
- 229920001169 thermoplastic Polymers 0.000 abstract 1
- 239000004416 thermosoftening plastic Substances 0.000 abstract 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42B—HATS; HEAD COVERINGS
- A42B3/00—Helmets; Helmet covers ; Other protective head coverings
- A42B3/32—Collapsible helmets; Helmets made of separable parts ; Helmets with movable parts, e.g. adjustable
-
- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42B—HATS; HEAD COVERINGS
- A42B3/00—Helmets; Helmet covers ; Other protective head coverings
- A42B3/04—Parts, details or accessories of helmets
- A42B3/06—Impact-absorbing shells, e.g. of crash helmets
-
- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42C—MANUFACTURING OR TRIMMING HEAD COVERINGS, e.g. HATS
- A42C2/00—Manufacturing helmets by processes not otherwise provided for
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
- B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General 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
- B29C66/71—General 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 composition of the plastics material of the parts to be joined
-
- 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
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
- B29K2995/002—Coloured
- B29K2995/0021—Multi-coloured
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/48—Wearing apparel
- B29L2031/4807—Headwear
- B29L2031/4814—Hats
- B29L2031/4821—Helmets
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
Méthode de fabrication de casques sportifs en polycarbonate ou autres matières thermoplastiques
La présente invention concerne une méthode de fabrication de casques sportifs en polycarbonate ou autres matières thermoplastiques similaires.Method of manufacturing sports helmets from polycarbonate or other thermoplastic materials
The present invention relates to a method of manufacturing sports helmets from polycarbonate or other similar thermoplastic materials.
Il est bien connu que les casques sportifs sont tres utilisés et notamment par les motocyclistes, dans le but de protéger la tête, en cas de chocs possibles.It is well known that sports helmets are very used and in particular by motorcyclists, in order to protect the head, in the event of possible shocks.
Ces casques, produits selon deux types différents appelés respectivement casques "intégral s" ou "jet", sont fabriqués conventionnellement par injection d'une matière thermoplastique appropriée, en général du polycarbonate.These helmets, produced according to two different types respectively called "integral" or "jet" helmets, are conventionally manufactured by injection of an appropriate thermoplastic material, generally polycarbonate.
Dans le but d'obtenir un produit très robuste et solide, ces casques sont actuellement fabriqués d'une seule pièce.In order to obtain a very robust and solid product, these helmets are currently made in one piece.
Ce mode opérationel, étant donné la conformation particulière d'un casque du type intégral, demande l'emploi de moules très compliqués et d'un coût très élevé.This operational mode, given the particular conformation of a helmet of the integral type, requires the use of very complicated molds and of a very high cost.
D'autre part, la fabrication de casques ayant des caractéristiques esthétiques très peu différentes les unes des autres nécessite l'emploi d'autant de moules correspondant à chacune de ces différences, ce qui entrai ne des investissements très importants.On the other hand, the manufacture of helmets having aesthetic characteristics which are very little different from each other requires the use of as many molds corresponding to each of these differences, which entailed very large investments.
En outre, les casques produits selon la méthode conventionnelle, ont nécessairement une couleur uniforme et ne peuvent pas, en pratique, être différenciés par la suite au moyen de différentes peintures, étant donné le risque d'une attaque chimique de la matière de support synthétique par des vernis susceptibles de provoquer des phénomènes de dégradation du support.In addition, helmets produced according to the conventional method, necessarily have a uniform color and cannot, in practice, be distinguished subsequently by means of different paints, given the risk of chemical attack on the synthetic support material. by varnishes likely to cause phenomena of degradation of the support.
De ce fait, le but de la présente invention est de pallier les inconvénients mentionnés ci-dessus en réalisant une méthode de fabrication de casques sportifs qui puisse être exécutée en utilisant des moules de coût très réduit et d'autre part qui permette de produire directement des casques à plusieurs couleurs.Therefore, the object of the present invention is to overcome the drawbacks mentioned above by carrying out a method of manufacturing sports helmets which can be carried out using molds of very low cost and on the other hand which allows direct production helmets in several colors.
Un autre but de la présente invention est aussi de réaliser une méthode de fabrication de casques sportifs permettant d'obtenir des casques ayant des caractéristiques tres différentes sans avoir à faire des investissements très importants.Another object of the present invention is also to provide a method of manufacturing sports helmets which makes it possible to obtain helmets having very different characteristics without having to make very large investments.
Les buts mentionnés ci-dessus sont obtenus par une méthode de fabrication de casques sportifs selon la présente invention, caractérisée en ce que cette méthode comporte une étape de réalisation des casques en deux ou plusieurs pièces séparées pouvant étre reliées successivement par une opération de soudage.The goals mentioned above are obtained by a method of manufacturing sports helmets according to the present invention, characterized in that this method comprises a step of producing helmets in two or more separate parts which can be connected successively by a welding operation.
D'une manière avantageuse, le casque est obtenu en pièces correspondant respectivement à la calotte et à la bande inférieure, laquelle se prolonge antérieurement jusqu'à toucher le menton.Advantageously, the helmet is obtained in pieces corresponding respectively to the cap and to the lower band, which extends anteriorly until it touches the chin.
Grâce à cette méthode de construction, on peut obtenir, en particulier à cause de la forme sensiblement uniforme de la calotte des casques sportifs, des casques ayant des caractéristiques esthétiques très dif férentes, en ne changeant uniquement que la forme de la bande inférieure.Thanks to this construction method, it is possible to obtain, in particular because of the substantially uniform shape of the shell of sports helmets, helmets having very different aesthetic characteristics, by only changing the shape of the lower band.
En outre, on peut obtenir directement des casques à deux couleurs, par moulage de matières synthétiques de couleurs différentes, de manière à obtenir les deux pièces formant le casque.In addition, two-color helmets can be obtained directly, by molding synthetic materials of different colors, so as to obtain the two parts forming the helmet.
On peut également prévoir la réalisation de casques en employant deux parties ayant une symétrie spéculaire par rapport à un plan de coupe vertical.One can also provide for the production of helmets by using two parts having a specular symmetry with respect to a vertical section plane.
En pratique, la méthode selon la présente invention permettant de réaliser le casque en plusieurs pièces, donne la possibilité d'employer, pour le moulage de ces pièces, des moules ayant une structure plus simple et de ce fait un coût très réduit et des dimensions plus peti tes que celles des moules conventionnels.In practice, the method according to the present invention making it possible to make the helmet in several parts, gives the possibility of using, for the molding of these parts, molds having a simpler structure and therefore very reduced cost and dimensions smaller than those of conventional molds.
La connexion entre les parties prémoulées du casque est réalisée par soudage par lame chauffante par des appareils connus en soi, comportant en plus de la plaque métallique mobile, un système d'étriers ou dispositifs d'ancrage similaires connus pouvant relier convenablement les parties devant être accouplées.The connection between the pre-molded parts of the helmet is carried out by welding with a heating blade by devices known per se, comprising, in addition to the movable metal plate, a system of known stirrups or similar anchoring devices capable of properly connecting the parts to be mated.
On enlève ensuite la bavure qui se forme entre les pièces ou parties accouplées, en correspondance de la ligne de soudage.The burr which forms between the parts or coupled parts is then removed, in correspondence with the welding line.
D'autres caractéristiques et avantages de la méthode de fabrication de casques sportifs selon la présente invention ressortiront de la description d'un exemple de réalisation préférée et du dessin dans lequel
La figure 1 représente les deux pièces ou parties du casque, moulées séparément, et
La figure 2 représente le casque obtenu en reliant les deux parties de la figure 1.Other characteristics and advantages of the method of manufacturing sports helmets according to the present invention will emerge from the description of a preferred embodiment and from the drawing in which
FIG. 1 represents the two parts or parts of the helmet, molded separately, and
FIG. 2 represents the helmet obtained by connecting the two parts of FIG. 1.
En référence aux figures, la méthode de fabrication de casques sportifs selon la présente invention prévoit une fabrication préliminaire de la calotte 1 et de la bande façonnée inférieure 2, par moulage par injection de polycarbonate auquel des colorants sont mélangés de fa çon appropriée.With reference to the figures, the method of manufacturing sports helmets according to the present invention provides for a preliminary manufacture of the cap 1 and of the lower shaped strip 2, by injection molding of polycarbonate to which dyes are mixed in an appropriate manner.
Cette calotte 1 et la bande 2 peuvent également être obtenues en couleurs différentes. This cap 1 and the band 2 can also be obtained in different colors.
Ces parties sont ensuite reliées entre elles au moyen d'un appareil de soudage à lame chauffante comportant des moyens appropriés pour fixer convenablement lesdites parties, de manière à maintenir les surfaces qui doivent être reliées, parallèles et tournées l'une vers l'autre. These parts are then connected to each other by means of a heating blade welding apparatus comprising means suitable for fixing said parts in such a way as to maintain the surfaces which are to be connected, parallel and turned towards one another.
On procède enfin à une opération de finissage du casque complet 3, au niveau de la ligne de soudage 4.Finally, a complete helmet 3 finishing operation is carried out at the welding line 4.
La description qui précède démontre le coté fonctionnel et la facilité de fabrication qui caractérisent la méthode de fabrication de casques sportifs selon la présente invention.The foregoing description demonstrates the functional dimension and the ease of manufacture which characterize the method of manufacturing sports helmets according to the present invention.
Il est bien entendu que cette méthode de fabrication a été décrite seulement à titre d'exemple indicatif et non limitatif et qu'elle est susceptible de nombreuses modifications et variantes évidentes pour l'homme de l'art. It is understood that this manufacturing method has been described only by way of an indicative and nonlimiting example and that it is capable of numerous modifications and variants obvious to those skilled in the art.
Claims (5)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT8220655A IT8220655A0 (en) | 1982-04-08 | 1982-04-08 | PROCEDURE FOR THE PRODUCTION OF SIMILAR POLYCARBONATE SPORTS HELMETS. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2524776A1 true FR2524776A1 (en) | 1983-10-14 |
| FR2524776B3 FR2524776B3 (en) | 1985-02-01 |
Family
ID=11170112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8305407A Granted FR2524776A1 (en) | 1982-04-08 | 1983-03-30 | METHOD FOR MANUFACTURING POLYCARBONATE SPORTS HELMETS OR OTHER THERMOPLASTIC MATERIALS |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE3308904A1 (en) |
| FR (1) | FR2524776A1 (en) |
| IT (1) | IT8220655A0 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996022710A1 (en) * | 1995-01-25 | 1996-08-01 | Franco Malenotti | Old style helmet with improved double ring |
| FR2863149A1 (en) * | 2003-12-08 | 2005-06-10 | Salomon Sa | MODULAR HELMET |
| CN114025633A (en) * | 2019-06-24 | 2022-02-08 | 米帕斯公司 | Helmet with a detachable head |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106102498B (en) * | 2014-03-07 | 2020-04-24 | 贝尔运动股份有限公司 | Endurance mountain bike chin strap |
-
1982
- 1982-04-08 IT IT8220655A patent/IT8220655A0/en unknown
-
1983
- 1983-03-12 DE DE19833308904 patent/DE3308904A1/en not_active Withdrawn
- 1983-03-30 FR FR8305407A patent/FR2524776A1/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996022710A1 (en) * | 1995-01-25 | 1996-08-01 | Franco Malenotti | Old style helmet with improved double ring |
| FR2863149A1 (en) * | 2003-12-08 | 2005-06-10 | Salomon Sa | MODULAR HELMET |
| EP1541047A1 (en) * | 2003-12-08 | 2005-06-15 | Salomon S.A. | Modular helmet |
| CN114025633A (en) * | 2019-06-24 | 2022-02-08 | 米帕斯公司 | Helmet with a detachable head |
| CN114025633B (en) * | 2019-06-24 | 2024-03-19 | 米帕斯公司 | Helmet |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3308904A1 (en) | 1983-10-13 |
| FR2524776B3 (en) | 1985-02-01 |
| IT8220655A0 (en) | 1982-04-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |