CH551855A - Shaping of plastic pipes - using two toroidally orientated gauge parts - Google Patents
Shaping of plastic pipes - using two toroidally orientated gauge partsInfo
- Publication number
- CH551855A CH551855A CH1234473A CH1234473A CH551855A CH 551855 A CH551855 A CH 551855A CH 1234473 A CH1234473 A CH 1234473A CH 1234473 A CH1234473 A CH 1234473A CH 551855 A CH551855 A CH 551855A
- Authority
- CH
- Switzerland
- Prior art keywords
- gauge parts
- orientated
- gauge
- plastic pipes
- toroidally
- Prior art date
Links
Classifications
-
- 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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/02—Bending or folding
- B29C53/08—Bending or folding of tubes or other profiled members
- B29C53/083—Bending or folding of tubes or other profiled members bending longitudinally, i.e. modifying the curvature of the tube axis
-
- 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
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
Plastics pipes are bent using two curved gauge parts >=1 of which rotates against the other about a common axis, the two being orientated in such a manner as to enclose the pipe. Spec. the o.d. of one of the gauge parts equals the i.d., of the other, and a toroidal cavity results when they are pushed one over the other.
Description
Das Biegen von Kunststoffrohren stellt bis heute eine recht schwierige und insbesonders auch arbeitsintensive Operation dar. Die Erfindung bezweckt hier Abhilfe zu schaffen und betrifft ein Verfahren zum Biegen von Kunststoffrohren, das dadurch gekennzeichnet ist, dass das Rohr mittels zweier bogenförmiger Lehrenteile gebogen wird, die sich gegeneinader oder nur einer gegen den andern um eine gemeinsame Achse drehen, sich übereinanderschieben und das Rohr umschliessen. Bei diesem Verfahren wird das Rohr mittels der zwei bogenförmigen Lehrenteile so in seiner Form gebogen, dass sein bogenäusserer Teil gestreckt, während sein bogeninnerer mehr nur abgerollt wird. Anhand der Zeichnung wird das Prinzip des Verfahrens erläutert. Es zeigen:
Fig.
A eine Vorderansicht einer Ausführung einer Biegevorrichtung zur Durchführung des Verfahrens, wobei die Vorrichtung für das Übereinanderschieben der Lehrenteile nur angedeutet wird,
Fig. B einen Schnitt nach der Linie I-I in Fig. A (vergrössert).
Die in Fig. A dargestellte Biegevorrichtung hat zwei bogen- förmige Lehrenteile 1 und 2, die mit einer Vorrichtung gegeneinander- und übereinandergeschoben werden. Die beiden Lehrenteile sind so ausgelegt, dass der Aussendurchmesser des Lehrenteils 2 praktisch gleich dem Innendurchmesser des Lehrenteils 1 ist. Die Vorrichtung, um die Lehrenteile um die
Achse 5 zu drehen, und die Verbindungsstäbe sind nur prinzipmässig angedeutet.
Durch das Übereinanderschieben der beiden Lehrenteile ergibt sich ein torusförmiger Hohlraum, der für die Entstehung des Bogens dient. Das Prinzip kann auch nur so angewendet werden, dass die Biegung nur durch das Drehen des einen Lehrenteils entsteht.
Der in Fig. B dargestellte Schnitt zeigt die beiden Lehrenteile 1 und 2 geschnitten. Sie sind so ausgelegt, dass die Innen bogeufläche des Lehrenteils 1 sowie die Aussenbogenfläche des Lehrenteils 2 je mit einer halbkreisförmigen Rille, entsprechend dem Durchmesser des zu biegenden Rohres, ver sehen ist. Für eine bessere Führung können die Lehrenteile mit einer Nut versehen werden. Eine Klemmvorrichtung 6, mit der das Rohr 4 während dem Biegevorgang am Ende festge halten wird, dient zugleich als Zufuhrleitung der benötigten Abkühlluft.
The bending of plastic pipes is a very difficult and especially labor-intensive operation to this day. The invention aims to provide a remedy here and relates to a method for bending plastic pipes, which is characterized in that the pipe is bent by means of two arcuate gauge parts that Rotate against each other or only one against the other around a common axis, slide one on top of the other and enclose the tube. In this process, the tube is bent in its shape by means of the two curved gauge parts in such a way that the outer part of the curve is stretched, while the inner part of the curve is only unrolled. The principle of the process is explained using the drawing. Show it:
Fig.
A is a front view of an embodiment of a bending device for performing the method, the device for sliding the gauge parts on top of one another only being indicated,
FIG. B shows a section along the line I-I in FIG. A (enlarged).
The bending device shown in Fig. A has two curved gauge parts 1 and 2, which are pushed against each other and over each other with a device. The two gauge parts are designed so that the outer diameter of the gauge part 2 is practically the same as the inner diameter of the gauge part 1. The device to the gauge parts around the
To rotate axis 5, and the connecting rods are only indicated in principle.
By sliding the two gauge parts on top of one another, a toroidal cavity results, which is used for the creation of the arch. The principle can also only be applied in such a way that the bend is only created by turning one gauge part.
The section shown in Fig. B shows the two gauge parts 1 and 2 cut. They are designed so that the inner curved surface of the gauge part 1 and the outer curved surface of the gauge part 2 are each seen with a semicircular groove, corresponding to the diameter of the tube to be bent. The gauge parts can be provided with a groove for better guidance. A clamping device 6, with which the tube 4 is held Festge during the bending process at the end, also serves as a supply line for the required cooling air.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1234473A CH551855A (en) | 1973-08-24 | 1973-08-24 | Shaping of plastic pipes - using two toroidally orientated gauge parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1234473A CH551855A (en) | 1973-08-24 | 1973-08-24 | Shaping of plastic pipes - using two toroidally orientated gauge parts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH551855A true CH551855A (en) | 1974-07-31 |
Family
ID=4382149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH1234473A CH551855A (en) | 1973-08-24 | 1973-08-24 | Shaping of plastic pipes - using two toroidally orientated gauge parts |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH551855A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4160006A (en) * | 1977-03-08 | 1979-07-03 | Hoechst Aktiengesellschaft | Process and device for the manufacture of a tube bend of a thermoplast |
| EP0128329A1 (en) * | 1983-05-07 | 1984-12-19 | Maschinen Witte KG | Clamping table |
| US5516479A (en) * | 1993-03-26 | 1996-05-14 | Aeroquip Zweigniederlassung Der Trinoza Gmbh | Method of and apparatus for bending plastic pipes |
-
1973
- 1973-08-24 CH CH1234473A patent/CH551855A/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4160006A (en) * | 1977-03-08 | 1979-07-03 | Hoechst Aktiengesellschaft | Process and device for the manufacture of a tube bend of a thermoplast |
| EP0128329A1 (en) * | 1983-05-07 | 1984-12-19 | Maschinen Witte KG | Clamping table |
| US5516479A (en) * | 1993-03-26 | 1996-05-14 | Aeroquip Zweigniederlassung Der Trinoza Gmbh | Method of and apparatus for bending plastic pipes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |