DE7540593U - DEVICE FOR PRODUCING DOUBLE-WALLED DRIP IRRIGATION PIPES FROM PLASTIC - Google Patents

Description

H.-D. ERNICKE.aOAUGSBURG.SCHWIBBOGENPLATZ SB

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HANS-DIETER ERNICKE

PATENT ADVOCATE

TEL. (0B21) SS 40 35

TELEGR. TECHNICAL COUNCIL AUGSBURG

Date:

August 30, 1976 G 75 49 593.5 217-48 ern / sch

Company Rainer Isolierrohrfabrik Max Drossbach 8852 Rain am Lech

Device for the production of double-walled drip irrigation pipes made of plastic /

The innovation relates to devices for the production of double-walled drip irrigation pipes made of plastic, in which one wall is smooth, the other is made with spiral transverse waves and both walls are in the contact area Wave crests are connected to one another, with the thread-like running in those formed by the transverse waves and the smooth wall Sewer walls in places water inlet and outlet

TEUEFONIC AGREEMENTS REQUIRED WRITTEN CONFIRMATION * ACCOUNT 059118 STADTS PARKASSG AUQSBURQ - ACCOUNT 0000314005 FORST-FUGGER-BANK AUGSBURG CHECK ACCOUNT Θ6333 · Β02 MUNICH

7540593 09.12.76

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Openings are introduced and the device consists of an endlessly revolving device connected to an extruder There is a deformation tool formed by the mold jaw halves, in whose internal profile provided with transverse corrugations the one original :, smooth-walled thermoplastic pipe by means of positive or negative pressure is deformed during a synchronous synchronization of the pipe feed and mold jaw movement.

Such drip irrigation pipes are known from DT-OS 2,360,283. They are preferred along in arid areas the Pfianzstellen relocated, the distances between the Wasseraustattsöffnungen approximately corresponds to the distances between plants, so that effective irrigation is achieved with minimal »water consumption.

The disadvantage of the known drip irrigation pipe is the inconvenience and difficulty of attaching the water inlet and outlet openings at certain points'; · At ^! The design of the previously known pipe must first of all make the water inlet openings in the helically corrugated inner pipe before the outer, smooth-walled pipe can be encased. The water inlet openings can only be inserted into the pipe wall from the outside.

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cut so that both tubes cannot easily be made in one ^ ug and can be united with one another. Another problem arises from the fact that if the outer smooth-walled tubes is opaque, can not see from the outside where the water inlets by the inner pipe. Therefore prepare it is difficult to attach the water outlet openings in very specific places.

The object of the innovation is to avoid these disadvantages and to develop a device with the help of which it is possible to use the drip irrigation pipe with a minimum of equipment in one Establish train and at the same time to form the water inlet openings and water outlet openings.

The essence of the innovation is that it exists between rows from adjoining mold jaw halves with helical transverse shafts each at least one mold jaw half is arranged with closed transverse shafts. It is recommended that the first and / or the last mold basin half a die A row of shaped jaws with helical cross shafts with profiles to form wart-like inwardly projecting elevations is provided "

7540593 09.12.76

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A tube corrugated in this way, its internal water inlet openings are formed during the manufacturing process, can be immediately followed and in one operation with a Sheath the smooth-walled outer tube. This process technology is obsolete. Because the inner pipe is pulled off faster than the outer jacket, the result is that the pipe material is still thermoplastic is a solid connection between the smooth pipe wall and the adjacent corrugated areas of the cross corrugated pipe.

As part of an exemplary embodiment of the innovation, it is provided that that the corrugated pipe is encompassed on the outside by the smooth pipe and that the water outlet openings from the outside into the smooth Cut into the wall by means of a step-by-step cutting tool and preferably through the water inlet openings Separation of inwardly protruding wart-like elevations are formed by means of fixed knives. The technology on the inwardly protruding wave crests to provide further inward protruding wart-like elevations and these with fixed ones To cut off knives during the manufacturing process of the pipes, is known. The innovation of course also offers the possibility of opening the openings in other ways, for example by punching, Cutting, fusion cutting and the like. To form.

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Details of the innovation are shown schematically and in the drawing for example shown. Show it:

Fig. 1 ·. a partial longitudinal section through a drip irrigation pipe,

FIG. 2: a partial longitudinal section through the tube according to FIG. 1 in enlarged view with water outlets and

3: a partial longitudinal section through the pipe according to FIG. 1 in an enlarged view with water inlet opening.

The three-dimensional shape of the device results from the design of the drip irrigation pipe that is to be produced with the device. The drip irrigation pipe 1 consists of a smooth-walled outer pipe 2 and a transversely corrugated inner pipe 3. The corrugated inner pipe 3 has sections 5 with closed transverse waves and intermediate longer sections 4 with helical transverse waves on. While the sections 4 with helical transverse waves in the usual way (DAS 1 303 583) by means of appropriately profiled Mold jaws 12 are provided, at least one mold jaw 11 is inserted into the row of mold jaws at the desired location, which in terms of their profiling from those of the mold jaws

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12 differs and thereby the longitudinal profile of the shown in FIG corrugated inner ear 3 forms.

On one side of the section 5 are located in the smooth outer tube 2 Wasserauftritisöffnungen 7, which are expediently with the help of a step-by-step cutting tool are cut from the outside after the two tubes 2,3 already together are connected. In Fig. 2, this area is shown enlarged, it is advisable to measure the distance between the Absdinitt 4 and the Section 5 to be enlarged by a wide transverse shaft 8 so that the end of section 5 can be seen from the outside.

The water inlets are at the other end of the section with closed transverse waves, but already formed in areas of the section with helical transverse waves. As shown enlarged in Fig. 3, it is formed by appropriate profiling the associated molding jaw 12 inwardly protruding wart-like elevations 9, which during the manufacturing process of the pipe by means of a fixed knife are cut in the usual way. In FIG. 3, the plane of action of the knife is denoted by 10. Through this it is possible to close the water inlets 6 only at this point form and otherwise not to cut the transversely corrugated inner tube 3.

It is of course also possible to choose an inverted spatial shape,

where the corrugated pipe is on the outside and the smooth-walled pipe is provided on the inside. In the case of a flat-walled tube, wart-like elevations that protrude inwards can also be formed in places you cut off by fixed knives, while the pipe over the Knife is moved away '. In this case, the attachment of water outlet openings is possible by going into the outside protruding wave crests that cut the water inlet slots.

The innovation is therefore not limited to the exemplary embodiments shown, but extends to all variants that are having knowledge of the disclosure according to the innovation.

Protection claims;

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Claims (3)

1.) Device for the production of double-walled drip irrigation pipes made of plastic, in which one wall is smooth, the other is made with spiral transverse waves and both Walls in the contact area of the wave crests are connected to one another, with water inlet and outlet openings being made in places in the thread-like channel walls formed by the transverse waves and the smooth wall, and where the device consists of a deforming ball, which is connected to an extruder and is formed from endlessly rotating mold jaw halves, in which it is provided with transverse dents. Inner profiling the one originally smooth-walled thermoplastic pipe - II - TELEPHONE AGREEMENTS REQUIRE WRITTEN CONFIRMATION ACCOUNT 059113 STADTSPARKASSE AUGSBURG - ACCOUNT 0000314005 FDRST-FUGG ER-BAN K AUGSBURG 7540593 09.12.76 'by means of overpressure or underpressure during a synchronous match lqufes deformed into it by tube feed and mold jaw movement is characterized in that between rows, consisting of mutually adjoining mold jaw halves (12) with helical transverse waves each at least ■ «'a mold jaw half (11) arranged with closed transverse shafts is. 2.) Device according to claim 1, characterized in that that in each case the first and / or the last mold jaw half (12) of one having the helical transverse waves ForiTibock row with profiles for the formation of wart-like inwardly projecting elevations (9) is provided. 3.) Device according to claim 1 or 2, characterized in that a stepwise cutting tool is provided to cut the water inlet openings from the outside into the smooth wall and that the noch.innen protruding wart-like elevations can be separated by means of a fixed knife. Dipl.-Ing.H.D.Ernicke patent attorney 7540593 09.1176