DE7518001U - CUTTING DEVICE FOR INTRODUCING WATER INLET OPENINGS IN DRAEN AND FILTER TUBES MADE FROM THERMOPLASTIC PLASTIC - Google Patents

Description

^ Device for making water inlets in
Drainage or filter pipes made of thermoplastic material

The innovation relates to devices for introducing
Water inlet openings in the walls of drainage or filter pipes made of thermoplastic material.

It is known to provide drainage pipes made of plastic with transverse waves or spirally shaped waves in one go with their production
slits to create the water inlets. One of the known processes (DT-PS 1 459 414) is when shaping the spiral-shaped corrugated drainage pipes that wart-like elevations are formed in the shaft drainers,

,will the dancch slit open by a screw-nut-shaped slotted tool *

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dos rotates around the "axis d" - drainage pipe and with its slitting tools engages in the wave troughs.

According to the known process (US Pat. No. 3,391,425), the inward preheat wave crests slit open by fixed knife edges are on the Coin nasty extruder and protrude radially outwards. Also In the process mentioned last, it has been carried out in practice, warxenförouga elevations on the inside of the valley of the transversely corrugated drainage pipes to arrange and this did the knife edge slit while the already profiled drainage pipe moved forward in the axial direction.

The slitting of wart-shaped elevations has the disadvantage of the laborious and expensive production of special tools, quite apart from the fact that the slitting of these wart-shaped elevations leaves particularly large water ingress openings which also allow fine-grained soil to enter. You are then forced to arrange complex filter layers around the plastic drainage pipe when it is being laid *

The innovation [is therefore based on the task,.

{Devices for the introduction of water inlet openings in t or

to develop the walls of drainage pipes, which the guards

and .7 "" ίτ. ·

Avoid knew Hethoden / producing narrower and of itself already acting as a filter water enterest ff mmgen allow ohna dd & Söcks Toeni the pipe wall remain iis pipe interior.

This object is achieved in that the water inlet openings be generated with the help of heated, the pipe wall penetrating fusion cutting, preferably the melting of the water inlet openings is carried out during the production of the drainage pipe. If the drainage pipes are provided with transverse or spiral waves, the water inlets become According to the new invention, from the outside in the wave troughs with the help of iron cutters rotating endlessly parallel to the pipe axis generated, which are pressed radially through the pipe wall in a partial area of their movement path running jointly with the pipe feed.

The advantage of the innovation is first of all that the usual forrcbacken can be used to produce the plastic pipes without a special shape change is required around the water inlets to be able to generate.

It does not matter for the innovation which Ouerschni + tsfoi ..) the Dran or filter pipe has, whether transverse waves are provided at all and whether these run exactly perpendicular to the pipe axis or are spiraled. M _to need to act to make, which brings the plastic areas located with the cutting edges in contact immediately to melt without the surrounding areas which "affects single borrowed the fusion cutting with a temperature of the plastic tube. Of course, the heating of the fusion cutting can be done in many ways , for example through heat transfer or through the direct introduction of electrical current.

It is obvious that the fusion edges are very thin-walled, in particular can also be designed needle-shaped, so that the thereby In practice, the created water inlet openings act like a filter and make the special arrangement of filter layers superfluous.

The structural arrangement and movement of the fusion cutting edges can be vary in manifold ways. In general, the innovation provides for a plurality of fusible cutting edges that can be connected to a heat source in a radial direction Direction to make at least the measure of the pipe wall thickness to be movable in an oscillating manner. Such an arrangement can be used when a drain or drain is at rest. Filter tube can also be used outside of the tube manufacturing machine.

If, in the spirit of innovation, the multitude of fusion cutting edges is also included in a stretch area in the same direction as the Dränbzw in advance. Filter tube are designed to be movable, then such is suitable Device for direct attachment to the deformation system producing the drainage pipe.

A preferred embodiment of the innovation is that the Fusion cutting arranged on endlessly revolving, flexible supports parallel to the pipe axis and at least in the area for the generation of the water

Λ.

inlet opening dimensioned route area with a heat source in Connected. A plurality of circumferential supports are preferably arranged around the drainage or filter pipe. When machining transversely or spirally corrugated drainage or filter pipes are the endless ones

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Carrier I _ _._ {with profile ribs of the same division-provided,

ir or filter j
which engage in the wave troughs of the drainage pipe and serve as a centering and / or driving element for the carrier. You can alternately connect the profile ribs and lard cutting in a selectable arrangement with the carrier,

L - or filter / because experience has shown that there are no feathers in the trough of the drainage pipe

There must be a water inlet opening.

ν The endless supports running across the Urals only take up a small amount of space. They can therefore be arranged so that they can be adjusted as desired in the machine frame ^ especially in order to adapt radially to the different drainage pipe diameters or to take into account the different cross-sectional shape of the pipe to take «The subject of the innovation can also be used to provide drainage pipes with water inlet openings that have a circular cross-section differ, for example, are provided with a base.

in one embodiment of the innovation _s ji t between the run of the circulating medium, the heat source, in particular electrically powered guide rails, and arranged with overrun and Ablaufschrigen for dipping

C j- or filter <

Provide fusion cutting and profile ribs in the drainage pipe. These guide rails can also be busbars, into which the fusion cutting edges run as soon as they come into contact with the Drönrohrwandung.Jiomman'-s.

Of course, there are also other options for solving the task at hand numerous other variants. For example, you know the fusible edge

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as a very thin nozzle through which a hot gas is briefly released is guided under pressure against the turn of the drainage pipe, whereby ^ likewise the Melting of water inlet openings with a small cross section is achieved can be. The firing) is therefore not limited to the ones shown Embodiments. But also extends to all other variants, which are useful for solving the task at hand. So you can, for example the fusion cutting edges also on the inner surface of the drainage pipe encompassing at least a partial area, radially and possibly axially parallel Arrange movable heated mold jaws. Such an arrangement is particularly recommended when the drainage pipe has a smooth wall and none. Ribs for driving circumferential fusion cutting edges (having.

, the innovation
Details * are schematic in the drawing and, for example,

placed. Show it:

Fig. 1: a longitudinal section through a uiaufenden carrier with it arranged fusion cutting,

Fig. 2: a cross-section through a non-round3 drainage pipe with at its Scope distributed carriers and

Fig. 3: a cross section through a smooth-walled drainage pipe with in Form jaws arranged melt cutting »

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In the exemplary embodiment of FIGS. 1 and 2, it is assumed that a (^ or w. Filter /
Drain pipe 1 in 'conventional manner with the help of an extruder (not shown

■. 't ^ screw-

represents) and a transversely or ^ shaped corrugated profiling

obtained in that. the still thermoplastic plastic tube is inserted between endlessly rotating mold jaws and pressed into the profile of the mold jaw inner surfaces with the help of Dxuck. ■ Once this profile has been completed, the device shown in Fig. 1 can be connected to the \ extruder so that the Wassereintdttsöffnunger "can be produced in one operation. The exemplary embodiment assumes these water inlet openings with the help of fusion cutting edges 8 in the

To melt the wave troughs 3 of the drainage pipe 1. For this purpose, the drainage pipe 1 are arranged distributed around the circumference

and parallel to the pipe axis circumferential carrier 4 is provided, which around deflection

not shown ) rollers 5 are performed. The ^r bearings of these pulleys 5 like for example va.se

be arranged on a frame 6 , which is adjustable radially to the pipe 1,

( or cross-sections ^ to adapt to different pipe diameters.

The individual carrier 4 is provided on its outside with a multiplicity of profile ribs 7, which are divided into two or more times the division of the transverse waves 2 'are arranged so that they can enter the ^ Wellerwtäler 3 intervene and from the transverse waves 2 of the forward moving drainage pipe can be taken. On the inside of the lower run of the girder there is a heat source 9 in Fc m a wooden strip 10 along which

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the Tiöjer 4 slides. It is assumed that the Tröger as well the profile ribs 7 from anem temperature-insensitive and if possible also non-electrically conductive material. In contrast, the fusible edges 8 arranged between the profile ribs 7 are made of metal, so that they heat up quickly during contact with the heating strip 10 and one Assume temperature that leads to the melting of the plastic. The heating strip 10 is on the inlet and outlet side with a run-up slope 11 and a run-off slope 12 provided, the inclination of which is chosen so that the fusion cutting edges

Leg the valleys 3 can intervene without the cross waves 2 in the neighboring rich

\ «
to touch or melt. The fusion cutting edges 8 should be embedded as firmly as possible in the carrier 4, which can be done, for example, by vulcanizing in a heat-resistant material or riveting to another flexible carrier. The protruding heads of the fusible cutters 8 on the inside of the carrier 4 can also be designed so that they function as contact surfaces when they are guided along a rail 10 designed as a power supply strip. This results in a direct current transfer to the Schraelz cutting edges with the immediate consequence of their heating. In this case, the length of the contact between the individual fusion cutting edges and the plastic tube can be reduced to a minute.

The embodiment of Fig. 1 also shows that the heating strip 10 with With the help of guide rods 13 on the frame 6 movably guided and by springs 14 burdened 5.st «In this way it is avoided that unforeseen pass-

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Solving difficulties between the tube 1 and the carrier 4 to damage the-vsr parts can drive.

One can also imagine that an additional, but not shown pressure device is provided, which the fusible edges 8, as soon as they are in engagement in the wave troughs 3, briefly prints through the wall of the plastic pipe 1.

C ■: ■

In the example of Fig. 2 it is shown that the drainage pipe 1 is practically a

C or Filt egg can have a lirbigen cross-section. With the innovation, there are also such drains

. Pipes that differ from the circular shape and have a base can be processed. It can also be seen from FIG. 2 that the circumferential supports 4 are distributed along the circumference of the drainage pipe 15 and so on. can be set so that the water inlet openings to be generated come to the right place.

In the exemplary embodiment of FIG. 3, a variant is a cross-section

smooth drainage pipe 20 is shown, which therefore has no projection », on a * circumferential arranged Tröger according to FIG. 1 to move forward. In these cases you can arrange the Schmelzsch suffer 8 on mold jaws 17 and in any Heat ways that are radially verateJLlbar to the drainage pipe 20. To the To isolate mold jaws 17 against heat loss, for example encompassed by clamping jaws 16 and ax with them the help of guides 18 and

- 10 I.

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Springs 19 to be connected. The radial adjustment of this unit initially leads to the fact that the clamping jaw 16 * rests on the circumference of the drainage pipe 20 and thus centers the pipe, whereupon, in the manner of a subsequent step, the molding jaw 17 penetrates further radially inward and with its Schroelzschinge 8 the Penetrates pipe wall. Such a device assigns one of FIG. 3 in a way parallel to the tube axis and reciprocating the carriage, then the water inlet apertures may also during the Rohrher- Γ position are introduced.

Alas, it shows that there are numerous possibilities, the water inlet openings to be generated by a melting process. The innovation ^ therefore extends to all variants that work according to this principle.

Protection claims :;

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Claims (10)

Dipl. Ing. H.-D. Ernicke Patent Attorney Dipl. Ing. H.-D. Ernicke 89 Augsburg Schwibbogenplatz 2b Tel. (0821) 554035 Telegr. Technikrat Augsburg Augsburg January 5, 1976 Your reference G 75 18 001.7 File 217-42 ern / sch Fa. Rainer Isolierrohrfabrik Max Droßbach PROTECTION CLAIMS 1.) Cutting device for introducing water inlets into the Walls of drainage or filter pipes made of thermoplastic material, characterized in that they doß a large number is arranged so as to be movable in an oscillating manner in the radial direction by fusible cutting edges (8) which can be connected to a heat source (9). 2.) Cutting device still claim 1, characterized in that that the plurality of fusion cutting edges (8) transversely to their cutting direction (l) is movably arranged. 3.) Cutting device according to claim 1 or 2, characterized in that the fusion cutting edges (8) on endlessly 7518001 05/06/76 .- II - ι- II - Fenden, flexible carriers (4) are arranged and at least in connection with a heat source (9) in the route area that is decisive for the generation of the water inlet opening stand. 4.) Cutting device according to claim 3, characterized in that that several circumferential carriers (4) are provided parallel to one another and at the same distance from an axis. 5.) Cutting device according to claim 3 or 4, characterized in that the endlessly rotating carrier (4) with Profile ribs (7) of the same pitch are provided, which engage in the wave troughs (3) of the drainage pipe (l) and act as a centering or / and serving organizer for the carrier (4). 6.) Cutting device according to claim 5, characterized in that that profile ribs (7) and fusion cutting edges (8) alternately connected to the carrier (4) in a selectable arrangement are. 7.) Cutting device according to claim 3 or the following, characterized in that between the strands of the circumferential Carrier (4) the heat source (9), in particular electrically fed guide strips (1O), arranged and with overrun as well 7518001 05.06.7811 - - πι - C Drainage marks (11, 12) for immersing the enamel sashes (8) and profile ribs (7) in dos drainage pipe (l) is provided. 8.,) Cutting device according to claim 1 or the following, characterized ge ke η η is characterized in that the single re carrier (4) for the purpose of adapting to different drainage pipe diameter radially adjustable rr \ - cj eo vein et is. 9.) Cutting device according to claim 1 or 2, characterized in that the fusion cutting edges (8) on the inner surface are angoerdnet by radially and possibly axially movable, heatable mold jaws (17). 10.) Cutting device according to claim 1 or one of the following, characterized in that the cross section of the fusion cutting edges (8) is thin-walled _f in particular needle-shaped. Dipl.-Ing.H.-D.Ernicke patent attorney