CH630161A5 - Plastic tube having an integrally formed collar, and a seal and method for its production - Google Patents

Description

The invention relates to a plastic pipe with a view of the third extension and an obliquely shaped sleeve and seal, with a wall area lying on the pipe part, which connects the third extension with the second closing first extension, an extension connected to it .

Send second extension with a larger inner diameter 65 Advantages of the invention emerge from the claims as that of the first extension, one with the second expansion and the following description in conjunction with the ring-connected retaining ring and a drawing in the retaining ring in which a Embodiment of the subject of the taken annular head part of a seal, the invention being illustrated. Show it:

3rd

630161

1 is a plastic pipe with a molded sleeve in front of bending. The shaping of a plastic pipe according to the invention towards the end part proceeds as follows:

Fig. 2 shows a first stage in the formation of the retaining ring with a second mandrel region 12a with a larger Aus-Fig. On a mandrel with a first mandrel region 12, a nem plastic tube with a molded sleeve. 3 shows the second stage of shaping the retaining ring with a diameter of 5 mm than that of the first mandrel region 12 and a sleeve on a plastic pipe according to FIG. 2. made of polyvi larger outside diameter than that of the second Dornben-nyl chloride with a first extension 2, which becomes a larger area 12a, a plastic tube 1 with formation of the first inside diameter than the tube 1. The first extension 2 extension 2 and the third extension 5 of the plastic continues in a second extension 3. The second extension tube is pushed.

Terung 3 goes over a sloping wall part 4 in a through the mandrel region 12c, the tube with a third third extension 5. End area 6 of extension 5 is provided with extension 5 (FIG. 1).

is bent back so far that it is again in the axial direction. The end region 6 of the third extension 5 is then extended to. The free end 7 of the bent-back end region 6 is heated above the deformation temperature, and the outside of the third extension 5 expediently ends opposite the 15 of the tube 1 with the first extension 2 and the second extension 3

Transition 8 between the third extension 5 and that is then enclosed with a first outer die 13,

inclined wall part 4. which is provided with an end wall 14 which corresponds to the position of the

In the room that is adapted by the third extension 5 and wall area 4.

the end part 6 of which is bent back, a head part 9 is formed by means of a second outer die part 14 with adapted

of a sealing member added. The head part 9 is provided with a 20 th recess 15, the end region 6 of the third extension

an annular sealing sleeve 10 connected, the tion 5 after insertion of the head part 9 of the sealing member,

the second extension 3 can be added. which is connected to the sealing collar, in radial

The distance between the free end 7 of the bent back direction is bent (Fig. 2).

end region of the third extension 5 and the counterpart of a third outer die part 16, which also

Overlying area 11 of the sleeve is selected so that the 25 is provided with an end recess 17, the

The head part 9 is not pulled out through this opening and the formable end region 6 is flanged inwards until it can be in the. extends essentially in the axial direction (Fig. 3).

As can be seen, the wall thickness of the extruded tube is the inner diameter in the region of the bent, axial part 1, the first extension 2 and the second extension end region 6 of the third extension 5 and

3, the third extension 5 and the end region 6, always about 30 inside diameters of the second extension 3 are essentially

equal. are equal to each other.

The production of such a plastic pipe is noted with the fact that it is very surprising that in this shaped sleeve and retaining ring is very simple, since the retaining ring is made from an extruded tube from a third party.

economically producible extruded plastic tubes go out extension 5 with end portion 6 using simple

can. 35 rather tools can be molded.

C.

2 sheets of drawings

Claims (8)

630161 2 PATENT CLAIMS headboard with a mountable in the second extension 1.Plastic pipe with molded sleeve and seal, is connected with a sealing sleeve and the open space of a first extension adjoining the pipe part, one between the free end of the retaining ring and the adjoining second extension with a larger lying socket area, is smaller than the head part . Such an inner diameter as that of the first extension, a 5-part plastic tube with a molded sleeve is known in the form of a retaining ring connected to the second extension and an injection-molded plastic tube part, with a removable retaining ring on the ring-shaped head part of an outer side of the second extension Seal, wherein the head portion is arranged with a in the second expanse, which is connected to the outside of the second rank sealable sealing collar and extension cooperates so that the retaining ring a small ver-the open space between the free end of the retaining ring and io displacement can experience in the axial direction. the opposite sleeve area is smaller than the This known plastic pipe with molded sleeve Head part, characterized in that the second extension has the disadvantage that an injection molded plastic pipe (3) in a third extension (5) with approximately the same with molded sleeve must be assumed, which means that the wall thickness is greater with a larger inner diameter as the manufacturing cost of such a plastic tube, the second extension (3) continues very high and an end region (6) is in the 15th substantially axially in the direction of the second extension (3). It is the object of the invention to bend a plastic tube with the formation of the retaining ring with a J-shaped cross-section, the sleeve and seal of the type indicated. create, not from an injection molded plastic 2. Plastic pipe according to claim 1, characterized marked tube needs to be assumed, but also an extru-net that the third extension (5) can be used with the bent back tube, while the formation of the end region (6) in cross section U -shaped. of the plastic pipe with molded sleeve and seal in 3. Plastic pipe according to claim 1 or 2, characterized-very simple way is feasible. is characterized in that the second extension (3) extends over a This object is achieved in that inclined wall area (4) in the third extension, the second extension in a third extension with (5) and the free end (7) of the bent back end 25 of approximately the same wall thickness but with a larger inner region (6) of the third extension than the transition diameter than the second extension and an end (8) between the third extension and sloping wall region essentially axially towards the second extension -area (4) is arranged. tion to form the retaining ring with a J-shaped cross section 4. Plastic pipe according to one of claims 1 to 3, is bent back. characterized in that the plastic tube part (1) which is advantageous is the third extension with the first extension (2), the second extension (3) and the third gene end region are U-shaped in cross section and Extension (5) have essentially the same wall thickness. detects the free end of the bent third extension 5. A method for producing a plastic pipe according to preferably the transition between the third patent claim 1, characterized in that from an ex-extension and an inclined wall area, the traditional pipe with a second extension, which in 35 is followed by the second extension. a third Er has approximately the same wall thickness. In this way a secure fixing of the head part of the Extension with a larger inner diameter than that of the second sealing member achieved so that the head part does not come out of the Extension continues to be pulled out after placement of the annular head retainer ring, while on the other hand partially an end portion of the third extension forms the bend back of the end portion of the third extension Retaining rings with at least a J-shaped cross section can be made back in a particularly simple manner, as will be explained later. will be. 6. The method according spoke 5, characterized in that that in a first stage you have the end area of the third extension, the pipe part, the first extension, Extension bends until it extends in the radial direction, the second extension and the third extension approximately that and then in a second step the same wall thickness in the radial direction 45. extending end portion bends further inward until it also relates to a method for extending substantially axially. Manufacturing such a plastic pipe according to the Qber 7. The method according to claim 5 or 6, characterized in that the additional claim 5. The method is characterized in that the bending back of the end region (6) is characterized in such a way that an extruded tube with one follows that the transition between the third extension and 50th extension, which continues in a roughly the same way as an inclined wall part, which connects the third extension with wall thickness, the third extension with a larger Indian extension, towards the free end diameter than that of the second extension, the bent-back end area of the third extension after arranging the annular head part is an end region. third extension to form the retaining ring with at least 8. The method according to any one of claims 5 to 7, thereby 55 most J-shaped cross-section is bent back, characterized in that the end part is bent back in such a way, expediently in a first stage the end-that with the third extension in cross-section a U -for- the third extension bent over until it forms in the essential retaining ring. extend in the radial direction of the tube part, and then in a second stage the radial end end 60 bent further back inward until it runs essentially axially and preferably opposite the transition between