FR2521062A1 - Slitter and deflector for extruded plastics tube - to produce sheet for pressing to shape - Google Patents
Slitter and deflector for extruded plastics tube - to produce sheet for pressing to shape Download PDFInfo
- Publication number
- FR2521062A1 FR2521062A1 FR8202230A FR8202230A FR2521062A1 FR 2521062 A1 FR2521062 A1 FR 2521062A1 FR 8202230 A FR8202230 A FR 8202230A FR 8202230 A FR8202230 A FR 8202230A FR 2521062 A1 FR2521062 A1 FR 2521062A1
- Authority
- FR
- France
- Prior art keywords
- die
- knife
- deflectors
- shape
- parison
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
- B26D3/001—Cutting tubes longitudinally
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
-
- 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
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/0027—Cutting off
-
- 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
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/0063—Cutting longitudinally
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion 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
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion 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
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
La présente invention vise un dispositif utilisable pour la mise en oeuvre d'un procédé connu, dans lequel on extrude de la matière plastique sous forme d'un élément tubulaire, on sépare cet élément dans le sens longitudinal de manière à former au moins deux éléments de feuille, on applique ces éléments de feuille simultanément contre la paroi de deux empreintes de moule, ce qui entraine leur découpe suivant le contour désiré. The present invention relates to a device which can be used for the implementation of a known method, in which plastic material is extruded in the form of a tubular element, this element is separated in the longitudinal direction so as to form at least two elements sheet, these sheet elements are applied simultaneously against the wall of two mold cavities, which causes them to be cut according to the desired contour.
La mise en oeuvre de ce procédé suppose, à la sortie d'une tête d'extrudeuse, une filière d'extrusion tubulaire et une pièce fixe disposée sous la filière et agencée pour séparer longitudinalement le tube-paraison sortant de ladite filière. The implementation of this process presupposes, at the outlet of an extruder head, a tubular extrusion die and a fixed part disposed under the die and arranged to longitudinally separate the parison tube leaving said die.
L'invention vise à permettre de réguler. suivant un programme défini, l'épaisseur de la paraison suivant les particularités de forme de la pièce à obtenir. The invention aims to allow regulation. according to a defined program, the thickness of the parison according to the particular features of the shape of the part to be obtained.
A cet effet, l'invention prévoit que la pièce de découpe de la paraison est un couteau monté sous la filière et le poinçon de la tête d'extrusion est rappelé élastiquement vers ces éléments de façon à demeurer en contact ou à très faible distance constante d'au moins un des dits éléments. To this end, the invention provides that the cutting part of the parison is a knife mounted under the die and the punch of the extrusion head is resiliently biased towards these elements so as to remain in contact or at very constant distance at least one of said elements.
Ce couteau est avantageusement refroidi de façon à le maintenir à une température suffisamment basse et éviter le collage de la matière. Le couteau peut également être muni de déflecteurs destinés à écarter les deux feuilles résultant de la découpe de la paraison, en vue, par exemple, de coiffer des pièces de part et d'autre desquelles doivent passer les deux feuilles. Sur les déflecteurs, il peut, en outre, être prévu des guides, ou nervures, orientés qui permettent un écoulement précis des feuilles découpées. This knife is advantageously cooled so as to maintain it at a sufficiently low temperature and avoid sticking of the material. The knife can also be provided with deflectors intended to separate the two sheets resulting from the cutting of the parison, with a view, for example, to covering pieces on either side from which the two sheets must pass. On the deflectors, there may also be provided guides, or ribs, oriented which allow precise flow of the cut sheets.
Le couteau peut être monté pivotant dans les deux sens de manière à donner à la découpe une forme quelconque. The knife can be mounted pivoting in both directions so as to give the cut any shape.
Le couteau peut aussi être escamotable de façon à pouvoir être mis hors de la trajectoire initiale de la paraison et permettre le réglage rapide de celle-ci au démarrage de la machine. The knife can also be retractable so as to be able to be put out of the initial trajectory of the parison and allow rapid adjustment thereof when the machine starts.
A titre nullement limitatif, on a représenté au dessin annexé un exemple de réalisation du dispositif selon l'invention, dessin sur lequel
- la figure 1 est une vue en élévation et coupe partielle de l'ensemble du dispositif en place sous la filière et le poinçon de l'extrudeuse ;
- la figure 2 est une vue en plan des couteaux et du déflecteur, et
- la figure 3 est une vue en coupe du déflecteur, selon la ligne III-III de la figure 1.By way of non-limiting example, there is shown in the accompanying drawing an embodiment of the device according to the invention, drawing in which
- Figure 1 is an elevational view and partial section of the entire device in place under the die and the punch of the extruder;
FIG. 2 is a plan view of the knives and the deflector, and
- Figure 3 is a sectional view of the deflector, along line III-III of Figure 1.
Dans l'exemple représenté, le dispositif de l'invention comprend deux couteaux 1, 1' rectangulaires coplanaires, mon tés sous la fente de sortie de la matière plastique extrudée, sous 1 'entrefer, entre la filière 2 et le poinçon 3 de l'ex- trudeuse. Ces couteaux sont supportés par la tete de l'extrudeuse par l'intermédiaire de noix 4, 4'. Ces noix sont percées d'un alésage 5 et sont rappelées vers la tete d'extrudeuse par un ressort 6 prenant appui sur des supports il, 11' liés au bati de l'extrudeuse, par l'intermédiaire des vis' 12, 12' permettant le réglage des couteaux.Sur les couteaux 1, 1' sont fixées les parties verticales 7, 7' de deux déflecteurs qui se prolongent vers le bas par deux parties inclinées 8, 8' et sont munies de guides ou nervures 9, 10, 9', 10'. In the example shown, the device of the invention comprises two knives 1, 1 ′ rectangular coplanar, mounted under the outlet slot of the extruded plastic, under the air gap, between the die 2 and the punch 3 of the 'extruder. These knives are supported by the head of the extruder by means of nuts 4, 4 '. These nuts are pierced with a bore 5 and are returned towards the extruder head by a spring 6 bearing on supports il, 11 'linked to the frame of the extruder, by means of the screws' 12, 12' allowing the adjustment of the knives. On the knives 1, 1 'are fixed the vertical parts 7, 7' of two deflectors which extend downwards by two inclined parts 8, 8 'and are provided with guides or ribs 9, 10, 9 ', 10'.
Les déflecteurs 8, 8' sont conformés pour présenter, dans leur face inférieure, des réservoirs 13, 13' dans lesquels peut circuler de l'eau de refroidissement. The deflectors 8, 8 'are shaped to present, in their lower face, reservoirs 13, 13' in which cooling water can circulate.
Il résulte de ce qui précède que la paraison extrudée sortant de la fente entre filière 2 et poinçon 3 est décou péeoen deux feuilles par les couteaux 1, 1' qui sont rappelés par les ressorts 6 et demeurent donc en contact ou à distance constante de la face inférieure du poinçon 3 ou de la filière 2, ou des deux. L'épaisseur de la paroi peut donc être réglée suivant un programme défini. It follows from the above that the extruded parison leaving the slot between die 2 and punch 3 is peeled off two sheets by the knives 1, 1 'which are returned by the springs 6 and therefore remain in contact or at constant distance from the underside of punch 3 or die 2, or both. The thickness of the wall can therefore be adjusted according to a defined program.
Après la coupe, les deux feuilles ainsi séparées sont écartées l'une de l'autre en suivant la partie inclinée 8, 8' des déflecteurs, ce qui permet de leur faire coiffer des pièces, telles que des mandrins, de formes quelconques avant le moulage. After cutting, the two sheets thus separated are separated from each other by following the inclined part 8, 8 ′ of the deflectors, which allows them to cap pieces, such as mandrels, of any shape before the molding.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8202230A FR2521062A1 (en) | 1982-02-11 | 1982-02-11 | Slitter and deflector for extruded plastics tube - to produce sheet for pressing to shape |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8202230A FR2521062A1 (en) | 1982-02-11 | 1982-02-11 | Slitter and deflector for extruded plastics tube - to produce sheet for pressing to shape |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2521062A1 true FR2521062A1 (en) | 1983-08-12 |
FR2521062B1 FR2521062B1 (en) | 1984-03-09 |
Family
ID=9270884
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8202230A Granted FR2521062A1 (en) | 1982-02-11 | 1982-02-11 | Slitter and deflector for extruded plastics tube - to produce sheet for pressing to shape |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2521062A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1435659A (en) * | 1919-12-29 | 1922-11-14 | Paramount Rubber Cons Inc | Method of and apparatus for making sheet rubber |
US2218751A (en) * | 1937-12-13 | 1940-10-22 | Pennsylvania Rubber Company | Rubber-extruding apparatus |
DE2213748A1 (en) * | 1972-03-22 | 1973-09-27 | Continental Gummi Werke Ag | Extrusion press for flat strip - produces tubular extrusion then slits it longitudinally into parallel strips |
-
1982
- 1982-02-11 FR FR8202230A patent/FR2521062A1/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1435659A (en) * | 1919-12-29 | 1922-11-14 | Paramount Rubber Cons Inc | Method of and apparatus for making sheet rubber |
US2218751A (en) * | 1937-12-13 | 1940-10-22 | Pennsylvania Rubber Company | Rubber-extruding apparatus |
DE2213748A1 (en) * | 1972-03-22 | 1973-09-27 | Continental Gummi Werke Ag | Extrusion press for flat strip - produces tubular extrusion then slits it longitudinally into parallel strips |
Also Published As
Publication number | Publication date |
---|---|
FR2521062B1 (en) | 1984-03-09 |
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Legal Events
Date | Code | Title | Description |
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ST | Notification of lapse |