DE1255292B - Device for deforming a pipe made of plastic - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

B 29 c

German AI .: 39 a2- 17/02

Number:
File number:
Registration date:
Display day:

1255292
H46660X / 39a2
August 16, 1962
November 30, 1967

The invention relates to a device for producing rigid, uniformly calibrated Plastic pipes in the same, matched lengths, from pipes with one-sided pipe end sleeves, from Pipes with outwardly curved flat beads and matching, associated normal or reducing sleeves for electrical installation purposes.

Smooth, rigid plastic pipes known so far are produced by calibration from a warm plastic hose emerging from the extruder with a cooled, stationary sleeve using compressed air or vacuum continuously with a uniformly unchangeable outer diameter made, with the hose through the sleeve with Is pulled through with the help of a trigger.

After the extrusion of the Plastic hose manufacture plastic pipes, which are transported with the help of a caterpillar haul-off will. The pipe running continuously from the calibration device is on its cooling section Automatically sawn into the desired lengths of e.g. 3m with the help of trailing cutting systems.

In order to be able to connect such smooth plastic pipes with one another, single sleeves are made of Plastic used to join the smooth pipe ends, which are sprayed or otherwise are produced individually or in groups in a cluster. There are also often retrospectives the smooth tubes are heated at one end and twisted so far that the inner diameter of the thorned sleeves corresponds to the normal outer diameter.

Other known socket connections can also be achieved by welding the pipe ends, the surfaces to be connected of the socket and the end pipe part before being plugged together up to a depth that is only a fraction of the pipe wall thickness due to brief heating in The remaining parts of the pipe wall thickness are not in the range of the pasty-liquid state thermoplastic deformability. If not loose single sleeves for a connection the smooth plastic pipes are used, but the pipes themselves at least on one side should subsequently receive a sleeve in order to be able to insert the smooth pipe end into it, must for this sleeve production usually involves additional work on the construction site.

According to the task set, the rigid, evenly calibrated plastic pipes are always gliding device for deforming a pipe
made of plastic

Applicant:

Wilhelm Hegler, insulating pipe factory,

Oerlenbach via Bad Kissingen

Named as inventor:
Wilhelm Hegler, Bad Kissingen

Chen to produce customized lengths or the pipes with one-sided, known pipe end sleeves provided in order to be able to connect the individual pipe lengths with one another via the one-sided sleeves, or to shape the tubes with outwardly curved, flat bulges. At the same time, there are also some Matching and associated socket parts for the pipes as normal connecting or reducing sleeves to produce the necessary for a connection of individual pipe short lengths or pipe sections, z. B. with thick-walled pipes or with grooved pipes, are required in the transition.

To solve these problems, a device for deforming a pipe made of plastic is used in the the pipe, coming out of the nozzle of an extrusion press in a still warm plastic state, split lengthways, in a closed path co-moving mold members is fed, from which after their Close the air is sucked off, in which, according to the invention, the mold members are distributed over the web, have different internal shapes, for example those of sleeves with a pipe socket, Pipe sections with bulges or double sockets.

The divided mold members, guided on a closed path, form the plastic tube in the known vacuum process characterized in that this is a tube with the provided beads and its end socket against the mold walls, with fine channels from the individual, in the molds incorporated recesses for the beads, the air is extracted in sections. the In this case, the mold track has so many mold members that one or more of the same is used for each revolution Pipe lengths can be manufactured.

709 690/484

Within the mold path, each one can leave the revolving mold path 20 according to their Individual pipe lengths are now cooled and solidified according to the invention. On her further Special mold members for the pipe end sleeves against the path, the sleeve pipes 1, 2 and the individual normal pipe mold members are exchanged, sleeves 3, 31 by conventional trailing cutting parts also the outer shape for an end socket of the 5 directions by means of saw blades 10 a and 10 i vonein socket pipe expediently separated within a mold, the necessary saw blade member can be arranged. wide from the size of the transition of each

With the device according to the invention, parts can be obtained, for. B. could also do it for the

of course - z. B. following the formed transition from the sleeve 3 or the reducing sleeve 31

Pipe end socket - one or more, possibly equal to the beginning of the pipe 1 according to F i g. 2 or 3 quite functional

if they have beads and fit the socket pipe, a short transition piece 4 through two

send out single sleeves by additionally inserting a saw cut 10 & and 10 b ' , whereby

or several neighboring and possibly also a perfect profile run-out on both

Can achieve replaceable mold parts within the mold path. Any rework on that

form limbs. In a second step 15 socket pipes 1, 2 and socket pipes separated from one another

can then fenteilen the socket parts of the socket pipes 3, 31 is unnecessary; a usual one is sufficient

be separated. Control of the finished pipe and socket pieces before

For the separation of the pipes and single sleeves it is to be brought into the dispatch,

expedient if the exit end of the in FIGS. 2 and 3 shown rigid and

Pipes from the mold path a known, ao smooth, for example thin-walled plastic muffle

trailing cutting device connects. tube 1 for electrical installation purposes has its

In the figures, exemplary embodiments of the end sleeve 2 behind the transition 1/2, with on the

known device and the invention pipe 1 and the sleeve 2 flat, outwardly curved,

object shown, wherein circumferential beads la and 2a are present, the

1 shows a plan view of a circuit which shows the top strength of the thin-walled tubes Mold track, heights and when applying the wall plaster for

Fig. 2 is a longitudinal section through a pipe with the plastic pipes laid under plaster this one

End socket, a normal socket and the beginning of the pipe, give additional support and their length expansion

Fig. 3 can prevent a longitudinal view of a tube with an end,

sleeve, a reducing sleeve and the beginning of the pipe and 30 As in particular from FIG. 4 recognizable, hit

F i g. 4 shows an enlarged partial longitudinal section of the only flat beads la and 2a not in the inner

Show pipe end socket with inserted pipe. space 1 / of the pipe and no interior

According to Fig. 1, the normal two-part grooves are generated. Through the surrounding beads la Mold members 40 and 40 'of the known in a circle, the beginning of the pipe can also be in the event of an occurrence run by the wheels 21, 21 'and 22, 22' guided 35 change in length within the internally weakly ko-mold path 20 more easily to form an artificially running pipe socket 2, Fabric tube 1 is provided, with the Kokillenglie- but the beads la at the same time abdichdem the air can act through fine, indentations for its tend within the socket joint. Bead ending channels is sucked off one after the other, the figures explain the with the invention the plastic tube exiting the extruder is made with beads and is made of material 1 'in the well-known vacuum process see plastic sleeve pipes and single sleeves in applies against the mold walls of the molds. It is the exemplary embodiments. In the same beschriedie The length of the mold manufacturing method built into the mold path can also vary with the various links 40, 40 'precisely in one or more tube types of smooth, beaded types lengths matched. Furthermore, an end sleeve part 2 45 plastic multiple pipes with their associated with its transition 1/2 (see Fig. 2) formed from each pipe socket and corresponding multiple socket length from Z. B. 3 m in a special two-part, parts are made. Here this Mehrin the track introduced mold member 41, 4Γ infill tubes be connected to one another by webs, be shaped. depending on the distance between the individual tubes in their

When laying plastic pipes, this can also be dimensioned 50 widths. The multiple sleeves required Individual sockets 3, around waste pipe lengths with pipes can accordingly with 2, 3, 4 or also to connect to each other, or reducing sleeves 31 more individual pipes or with different according to FIG. 3, if pipes with a thicker diameter are provided with web widths. The pipes and theirs or, for example, leave corrugated pipes for floor pieces with smooth, associated and necessary individual sleeves If thin pipes are to be connected, the same two process steps can be used in the 55 Establish connection to the end socket 2 in a two-part correspondingly divided mold members Separate further, neighboring mold member 42,42 'of the co- and after cooling by saw cuts, Killenbahn 20 from the plastic tube 1 'formed by the art formed according to the invention be, whereby also several mold members material pipes with possibly integrally molded sleeves 42, 42 'for sleeves of the same type 3 or different 60 and also outer beads, the laying of these designed reducing sleeves 31 with one another in the um- pipes for an electrical installation essentially converging Mold path 20 can be installed. as when laying normal

The sleeves 3, 31 also have the same lengths on the outside, the light pipes only plugged into one another to form flat beads 3a , but they are useful in their middle, when laying short lengths or moderately with an inwardly drawn 65 for a combination with others Pipe sizes, however, provide a groove 3 r against which the corresponding individual socket parts and those with all guided pipe ends 1 can rest. The ready-made reduction transitions can be made to join the deformed socket pipes 1, 2 and the socket parts 3, 31 at the same time.

Claims (2)

Patent claims: 1. Device for deforming a pipe made of plastic, in which the pipe, in a still warm plastic state, from the nozzle of an extrusion press coming, longitudinally split mold members moving along in a closed path is supplied, from which the air is sucked out after they are closed, characterized in that that the mold members (40, 40 '), distributed over the web, have different internal shapes have, for example those of sleeves with pipe socket, pipe sections with Bulge or double socket. 2. Apparatus according to claim 1, characterized in that the outlet end of the Pipes from the mold path are followed by a known trailing cutting device. Considered publications:
U.S. Patent Nos. 2792591, 2866230. 1 sheet of drawings 709 690/484 11.67 θ Bundesdruckerei Berlin