WO2015092259A1 - Novel venting system for any blow-moulding mould and method of production - Google Patents
Novel venting system for any blow-moulding mould and method of production Download PDFInfo
- Publication number
- WO2015092259A1 WO2015092259A1 PCT/FR2014/053360 FR2014053360W WO2015092259A1 WO 2015092259 A1 WO2015092259 A1 WO 2015092259A1 FR 2014053360 W FR2014053360 W FR 2014053360W WO 2015092259 A1 WO2015092259 A1 WO 2015092259A1
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- WIPO (PCT)
- Prior art keywords
- mould
- mold
- duct
- notches
- wall
- Prior art date
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Classifications
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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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/62—Venting means
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C2049/4879—Moulds characterised by mould configurations
- B29C2049/4892—Mould halves consisting of an independent main and bottom part
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C49/487105—Moulds characterised by the manufacturing process
Definitions
- the present invention relates to a new system for expelling air between the mold and the molded and blow molded part and its method of production. It applies particularly, but not exclusively, to the molds used for the manufacture of plastic bottles (polyethylene terephthalate or PET).
- This system can in fact be applied to any mold in which is inserted a deformable material preform, subjected to an internal pressure and / or external or vacuum, in order to make it fit the shape of the mold.
- a preheated polyethylene terephthalate preform is introduced into the mold, then its walls are pressed against the inner wall of the mold under the effect of injection molding.
- a gas under pressure generally ambient air under pressure.
- Patent FR 0903367 previously issued to COMEP discloses a mold for plastic bottle bottom characterized in that it consists of two interlocking parts, air exhaust ducts arranged on all parts at locations depending on the shape to be reproduced, the spacing between the two parts may also vary so as to modulate the air exhaust depending on the location.
- the pressure to be exerted during the blowing must be relatively large in order to overcome the resistance of the air trapped between the outer wall of the preform and the inner wall of the mold, as well as the quantity of material used; this impacts the time required for manufacture;
- the equipment used may be damaged by pressure
- the system according to the present invention overcomes these disadvantages. Its design was guided by a concern for simplification, generalization, optimization in terms of quality, cost and therefore profitability.
- Figures 1 and 2 show mold funds equipped with the system according to the invention.
- Figure 3 shows the vertical wall of a mold equipped with said system and Figure 4 the connection of the grooves to the air exhaust ducts.
- At least one notch (1) in the form of a groove or of any other shape is arranged on the inner wall (2) of the mold by following a cutout (3) and potentially on the entire internal wall (2) of the mold, on all parts making up the mold.
- Each notch (1) is connected by any suitable means to at least one duct (4) discharging air towards the outside through the wall of the mold, a plurality of notches (1) being connectable to a same duct (4) and at least one conduit (4).
- Each duct (4) allows air trapped between the preform (5) and the wall (2) to escape very easily, uniformly, continuously, during blowing.
- the number of notches (1) and the number of ducts (4) are a function of the number and the nature of the cuts (3) of the mold to be reproduced.
- the system according to the invention allows:
- blow mold may be in any suitable form, provided that it allows the internal mold cuts to be followed and allows the air to escape easily, continuously and evenly during the mold. blowing operation.
- the method for producing said venting system comprises the three-dimensional computer entry of the mold internal cut-outs (3), then the arrangement, by traversing these cut-outs (3), of cuts (1) and ducts (4) of venting, each notch (1) being connected to at least one duct (4) and several notches (1) connectable to the same duct (4) and at least one duct (4).
- the number of notches (1) and the number of ducts (3) are a function of the number and nature of the cuts (3).
- Notches (3) can be provided on the entire inner wall (2) of the mold.
Abstract
The present invention relates to a novel system that allows air to be driven out from between the mould and the made part obtained by moulding and blow-moulding and to the method of producing same. It applies quite particularly although not exclusively to the mould used for the manufacture of plastic (PET) bottles. At least one cut (1) in the form of a groove or any other shape is formed on the internal wall (2) of the mould following a cutout (3) and potentially along the entire internal wall (2) of the mould, over all the parts that make up the mould. Each cut (1) is connected to at least one duct (4) for removing air to the outside. The number of cuts (1) and the number of ducts (4) are dependent on the number and nature of cutouts (3) of the mould to be reproduced. The system according to the invention notably makes it possible to optimise the reproduction of the shape by allowing the material used to be pressed better against the cutouts (3) of the mould, makes it possible to optimise profitability by reducing production and maintenance costs and makes it possible to obtain a better quality and more lightweight product.
Description
NOUVEAU SYSTÈME D'ÉVENTATION POUR TOUT MOULE DE SOUFFLAGE ET PROCÈDE DE RÉALISATION NOVEL VENT SYSTEM FOR ANY BLOW MOLD AND PROCESS FOR CARRYING OUT SAID METHOD
La présente invention concerne un nouveau système permettant de chasser l'air entre le moule et la pièce confectionnée obtenue par moulage et soufflage et son procédé de réalisation. Elle s'applique tout particulièrement, mais non de façon exclusive, aux moules utilisés pour la fabrication des bouteilles en matière plastique (polytéréphtalate d'éthylène ou PET). Ce système peut en effet s'appliquer à tout moule dans lequel est insérée une préforme en matière déformable, soumise à une pression interne et/ou externe ou par dépression, en vue de lui faire épouser la forme du moule. The present invention relates to a new system for expelling air between the mold and the molded and blow molded part and its method of production. It applies particularly, but not exclusively, to the molds used for the manufacture of plastic bottles (polyethylene terephthalate or PET). This system can in fact be applied to any mold in which is inserted a deformable material preform, subjected to an internal pressure and / or external or vacuum, in order to make it fit the shape of the mold.
Dans le cas de la fabrication des bouteilles en matière plastique, une préforme en polytéréphtalate d'éthylène, préalablement chauffée, est introduite dans le moule, puis ses parois sont plaquées contre la paroi interne du moule sous l'effet de l'injection d'un gaz sous pression, généralement de l'air ambiant sous pression. In the case of the manufacture of plastic bottles, a preheated polyethylene terephthalate preform is introduced into the mold, then its walls are pressed against the inner wall of the mold under the effect of injection molding. a gas under pressure, generally ambient air under pressure.
Les problèmes rencontrés lors de cette opération sont liés à la présence d'air entre la paroi interne du moule et la préforme et à la maîtrise de la force de pression qui doit en tout point être suffisante pour permettre à la matière d'épouser fidèlement les différentes découpes du moule, tout en préservant ce dernier de toute déformation. The problems encountered during this operation are related to the presence of air between the inner wall of the mold and the preform and the control of the pressure force which must in all points be sufficient to allow the material to marry faithfully the different cuts of the mold, while preserving the latter from any deformation.
L'analyse de l'état de la technique révèle plusieurs brevets se rapportant à des moules conçus en vue de la réalisation de bouteilles en matière plastique par soufflage : FR 2902688, US 5240402, FR 2086554, GB 1535134, FR 0903367, par exemple. The analysis of the state of the art reveals several patents relating to molds designed for the production of plastic bottles by blowing: FR 2902688, US 5240402, FR 2086554, GB 1535134, FR 0903367, for example.
De façon connue, le problème lié à la présence d'air résiduel a été résolu le plus souvent en aménageant très ponctuellement, dans les parois du moule, souvent constitué de plusieurs parties, des conduits permettant à l'air de s'échapper. Aucun des titres cités n'expose les caractéristiques techn iques de la présente invention. Le brevet FR 0903367 précédemment délivré à la société COMEP décrit un moule pour fond de bouteille en matière plastique caractérisé en ce qu'il est constitué de deux pièces emboîtables, de conduits d'échappement de l'air aménagés sur toutes les pièces à des emplacements
fonction de la forme à reproduire, l'espacement entre les deux pièces pouvant en outre varier de façon à moduler l'échappement de l'air selon les endroits. In known manner, the problem related to the presence of residual air has been solved most often by arranging very occasionally in the walls of the mold, often consisting of several parts, ducts allowing air to escape. None of the titles cited disclose the technical features of the present invention. Patent FR 0903367 previously issued to COMEP discloses a mold for plastic bottle bottom characterized in that it consists of two interlocking parts, air exhaust ducts arranged on all parts at locations depending on the shape to be reproduced, the spacing between the two parts may also vary so as to modulate the air exhaust depending on the location.
Les inconvénients liés à ces systèmes sont nombreux : The disadvantages of these systems are numerous:
- la pression à exercer lors du soufflage doit être relativement importante afin de vaincre la résistance de l'air emprisonné entre la paroi externe de la préforme et la paroi interne du moule, de même que la quantité de matière utilisée ; ceci impacte le temps nécessaire à la fabrication ; the pressure to be exerted during the blowing must be relatively large in order to overcome the resistance of the air trapped between the outer wall of the preform and the inner wall of the mold, as well as the quantity of material used; this impacts the time required for manufacture;
- le matériel utilisé peut être endommagé sous l'effet de la pression ; - the equipment used may be damaged by pressure;
- la reproduction de la forme du moule, parfois complexe, est souvent imparfaite ; en outre, les produits obtenus portent la marque des orifices des conduits aménagés dans les moules pour permettre l'échappement de l'air. - the reproduction of the shape of the mold, sometimes complex, is often imperfect; in addition, the products obtained bear the mark of the orifices of the ducts arranged in the molds to allow the escape of air.
Le système selon la présente invention permet de remédier à ces inconvénients. Sa conception a été guidée par un souci de simplification, de généralisation, d'optimisation en termes de qualité, de coût et donc de rentabilité. The system according to the present invention overcomes these disadvantages. Its design was guided by a concern for simplification, generalization, optimization in terms of quality, cost and therefore profitability.
Il se distingue radicalement au point de vue technique : il est constitué d'entailles en forme de rainures ou de toute autre forme, qui suivent toutes les formes ou découpes du moule, peuvent être aménagées sur toute sa paroi interne et sont raccordées par soudure ou par tout moyen adéquat à au moins un conduit d'évacuation de l'air traversant la paroi du moule. It differs radically from the technical point of view: it consists of notches in the form of grooves or any other shape, which follow all the shapes or cuts of the mold, can be arranged on its entire inner wall and are connected by welding or by any suitable means to at least one air evacuation duct passing through the wall of the mold.
L'invention est représentée à titre non limitatif sur les figures 1 à 4. The invention is represented in a nonlimiting manner in FIGS. 1 to 4.
Les figures 1 et 2 représentent des fonds de moules équipés du système selon l'invention. Figures 1 and 2 show mold funds equipped with the system according to the invention.
La figure 3 représente la paroi verticale d'un moule équipé dudit système et la figure 4 le raccordement des rainures aux conduits d'évacuation de l'air. Figure 3 shows the vertical wall of a mold equipped with said system and Figure 4 the connection of the grooves to the air exhaust ducts.
Sur les figures 1 à 4, une seule entaille est aménagée de façon continue sur tout le parcours de la découpe concernée ; il est aussi possible d'aménager de façon discontinue plusieurs entailles sur ce même parcours. In Figures 1 to 4, a single notch is arranged continuously along the entire path of the cut concerned; it is also possible to arrange discontinuously several cuts on the same course.
Selon un mode de réalisation de l'invention, au moins une entaille (1 ) en forme de rainure ou de toute autre forme est aménagée sur la paroi interne (2) du moule en en suivant une découpe (3) et potentiellement sur toute la paroi interne (2) du moule, sur toutes les pièces composant le moule. Chaque
entaille (1 ) est raccordée par tout moyen adéquat à au moins un conduit (4) d'évacuation de l'air vers l'extérieur traversant la paroi du moule, plusieurs entailles (1 ) pouvant être raccordées à un même conduit (4) et à au moins un conduit (4). Chaque conduit (4) permet à l'air emprisonné entre la préforme (5) et la paroi (2) de s'échapper très facilement, uniformément, de façon continue, lors du soufflage. Le nombre d'entailles (1 ) et le nombre de conduits (4) sont fonction du nombre et de la nature des découpes (3) du moule à reproduire. According to one embodiment of the invention, at least one notch (1) in the form of a groove or of any other shape is arranged on the inner wall (2) of the mold by following a cutout (3) and potentially on the entire internal wall (2) of the mold, on all parts making up the mold. Each notch (1) is connected by any suitable means to at least one duct (4) discharging air towards the outside through the wall of the mold, a plurality of notches (1) being connectable to a same duct (4) and at least one conduit (4). Each duct (4) allows air trapped between the preform (5) and the wall (2) to escape very easily, uniformly, continuously, during blowing. The number of notches (1) and the number of ducts (4) are a function of the number and the nature of the cuts (3) of the mold to be reproduced.
Le système selon l'invention permet : The system according to the invention allows:
- d'appliquer une pression moins importante, de l'ordre de 10 à 16 bars au lieu des 22 à 40 bars jusqu'alors nécessaires, lors du soufflage, et sur une durée plus réduite, la résistance opposée par l'air étant diminuée du fait de son expulsion rapide et continue ; - To apply a lower pressure, of the order of 10 to 16 bars instead of the 22 to 40 bars previously required, during the blowing, and for a shorter period, the resistance opposed by the air being decreased because of his rapid and continuous expulsion;
- d'utiliser moins de matière ; - to use less material;
- d'optimiser la reproduction de la forme en permettant de mieux plaquer la matière utilisée sur les découpes (3) du moule ; optimizing the reproduction of the shape by making it possible to better flatten the material used on the blanks (3) of the mold;
- d'optimiser la rentabilité en réduisant les coûts de production, de maintenance et en permettant d'obtenir un produit de meilleure qualité et plus léger. - optimize profitability by reducing production and maintenance costs and by making it possible to obtain a better and lighter product.
Il concerne tout moule de soufflage et peut se présenter sous toute forme appropriée, pourvu qu'elle permette de suivre les découpes internes du moule et qu'elle permette à l'air de s'échapper facilement, de façon continue et uniformément lors de l'opération de soufflage. It concerns any blow mold and may be in any suitable form, provided that it allows the internal mold cuts to be followed and allows the air to escape easily, continuously and evenly during the mold. blowing operation.
Le procédé de réalisation dudit système d'éventation comporte la saisie informatique en trois dimensions des découpes (3) internes du moule, puis la disposition, en parcourant ces découpes (3), d'entailles (1 ) et de conduits (4) d'évacuation de l'air, chaque entaille (1 ) étant raccordée à au moins un conduit (4) et plusieurs entailles (1 ) pouvant être raccordées à un même conduit (4) et à au moins un conduit (4). Le nombre d'entailles (1 ) et le nombre de conduits (3) sont fonction du nombre et de la nature des découpes (3). Des entailles (3) peuvent être prévues sur toute la paroi interne (2) du moule.
The method for producing said venting system comprises the three-dimensional computer entry of the mold internal cut-outs (3), then the arrangement, by traversing these cut-outs (3), of cuts (1) and ducts (4) of venting, each notch (1) being connected to at least one duct (4) and several notches (1) connectable to the same duct (4) and at least one duct (4). The number of notches (1) and the number of ducts (3) are a function of the number and nature of the cuts (3). Notches (3) can be provided on the entire inner wall (2) of the mold.
Claims
1 . Système d'éventation pour moule de soufflage, caractérisé en ce qu'il est constitué d'au moins une entaille (1 ) aménagée sur la paroi interne (2) du moule en en suivant une découpe (3) et raccordée à au moins un conduit (4) d'évacuation de l'air vers l'extérieur traversant la paroi du moule, des entailles (1 ) pouvant potentiellement être aménagées sur toute la paroi interne (2) du moule, et en ce que le nombre d'entailles (1 ) et le nombre de conduits (4) sont fonction du nombre et de la nature des découpes (3) à reproduire, chaque entaille (1 ) étant raccordée à au moins un conduit (4), plusieurs entailles (1 ) pouvant être raccordées à un même conduit (4) et à au moins un conduit (4). 1. Ventilation system for blow mold, characterized in that it consists of at least one notch (1) arranged on the inner wall (2) of the mold by following a cutout (3) and connected to at least one duct (4) for venting the air passing through the wall of the mold, notches (1) that can potentially be arranged on the entire inner wall (2) of the mold, and in that the number of notches (1) and the number of ducts (4) are a function of the number and nature of the cuts (3) to be reproduced, each notch (1) being connected to at least one duct (4), several notches (1) being connected to the same conduit (4) and at least one conduit (4).
2. Procédé de réalisation d'un système d'éventation pour moule de soufflage, caractérisé en ce qu'il comporte la saisie informatique en trois dimensions des découpes (3) internes du moule, puis la disposition, en parcourant ces découpes (3), d'entailles (1 ) et de conduits (4) d'évacuation de l'air, en ce que chaque entaille (1 ) est raccordée à au moins un conduit (4), plusieurs entailles (1 ) pouvant être raccordées à un même conduit (4) et à au moins un conduit (4), en ce que le nombre d'entailles (1 ) et de conduits (4) est fonction du nombre et de la nature des découpes (3), des entailles (1 ) pouvant être prévues sur toute la paroi interne (2) du moule.
2. A method of producing a venting system for a blow mold, characterized in that it comprises the three-dimensional computer entry of the internal cutouts (3) of the mold, then the arrangement, by traversing these cuts (3). , notches (1) and ducts (4) for evacuation of air, in that each notch (1) is connected to at least one duct (4), several notches (1) being connectable to one same duct (4) and at least one duct (4), in that the number of notches (1) and ducts (4) is a function of the number and the nature of the cuts (3), notches (1). ) can be provided on the entire inner wall (2) of the mold.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1303015A FR3015343B1 (en) | 2013-12-19 | 2013-12-19 | NOVEL EVENTATION SYSTEM FOR ANY BLOW MOLD AND METHOD OF MAKING SAME |
| FR1303015 | 2013-12-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015092259A1 true WO2015092259A1 (en) | 2015-06-25 |
Family
ID=50137717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2014/053360 WO2015092259A1 (en) | 2013-12-19 | 2014-12-16 | Novel venting system for any blow-moulding mould and method of production |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR3015343B1 (en) |
| WO (1) | WO2015092259A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10081126B2 (en) * | 2015-02-25 | 2018-09-25 | S.I.P.A. Societa' Industrializzazione Progettazione E Automazione S.P.A. | Blow mold for manufacturing containers made of thermoplastic material |
| US10556375B2 (en) * | 2016-09-23 | 2020-02-11 | Sidel Participations | Mould base provided with decompression channels opening on to a peripheral upper face |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114734578B (en) * | 2022-03-21 | 2024-02-09 | 湖北汉塑管业集团有限公司 | Hot-melting heat-insulating sleeve die for nodular cast iron pipe |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040202745A1 (en) * | 2003-04-11 | 2004-10-14 | Wentworth Mold Inc. | Hot fill mold shell assembly with reduced heat transfer |
| US20050287242A1 (en) * | 2004-06-29 | 2005-12-29 | Jarman Jonathon P | Apparatus for molding a beverage container with optimized base |
| FR2947755A1 (en) * | 2009-07-08 | 2011-01-14 | Comep | Mold for bottom of plastic material bottle, has space formed between two embedding parts, where space between embedding parts is greater than strategic place to allow flow of preserved residual air |
| DE102010032618A1 (en) * | 2010-07-29 | 2012-02-02 | Fhw-Moulds Gmbh | Blow mold for use in construction kit for manufacturing of containers, particularly canisters, has two tool components, particularly tool halves, which are movable against each other for opening and closing tool |
-
2013
- 2013-12-19 FR FR1303015A patent/FR3015343B1/en active Active
-
2014
- 2014-12-16 WO PCT/FR2014/053360 patent/WO2015092259A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040202745A1 (en) * | 2003-04-11 | 2004-10-14 | Wentworth Mold Inc. | Hot fill mold shell assembly with reduced heat transfer |
| US20050287242A1 (en) * | 2004-06-29 | 2005-12-29 | Jarman Jonathon P | Apparatus for molding a beverage container with optimized base |
| FR2947755A1 (en) * | 2009-07-08 | 2011-01-14 | Comep | Mold for bottom of plastic material bottle, has space formed between two embedding parts, where space between embedding parts is greater than strategic place to allow flow of preserved residual air |
| DE102010032618A1 (en) * | 2010-07-29 | 2012-02-02 | Fhw-Moulds Gmbh | Blow mold for use in construction kit for manufacturing of containers, particularly canisters, has two tool components, particularly tool halves, which are movable against each other for opening and closing tool |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10081126B2 (en) * | 2015-02-25 | 2018-09-25 | S.I.P.A. Societa' Industrializzazione Progettazione E Automazione S.P.A. | Blow mold for manufacturing containers made of thermoplastic material |
| US10556375B2 (en) * | 2016-09-23 | 2020-02-11 | Sidel Participations | Mould base provided with decompression channels opening on to a peripheral upper face |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3015343B1 (en) | 2016-07-29 |
| FR3015343A1 (en) | 2015-06-26 |
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