Apparatus for forming sleeves on plastic pipes

Abstract

The invention describes an apparatus for forming a sleeve on an end of cut-to-length plastic pipes (3), said apparatus comprising a stand (4), a transverse conveyor (27) for the plastic pipes (3), at least two devices which are arranged along the transverse conveyor (27) in the stand (4) and are intended firstly for heating the pipe ends (2) and secondly for expanding the heated pipe ends (2) to form a sleeve, wherein the devices have split moulds (16, 17) which encompass the outside of the pipe ends (2) and can be adjusted transversely with respect to the conveying direction with the aid of actuating drives (18) mounted in the stand (4), and comprising at least one mould (7, 8), which can be inserted axially into the pipe end (2), for at least one of the devices. In order to make it easy to retrofit the apparatus, the invention proposes that the devices form exchangeable structural components (1) which are mounted in the stand (4) such that they can be displaced in the axial direction and comprise holders (24) for the split moulds (16, 17), which can be released by their actuating drives (18), and also, with the exception of the actuating drive (18) for the split moulds (16, 17), all the moulds (7, 8) and drives (11, 12) which are respectively associated with these devices.

Description

technical field [0001] The invention relates to a device for forming sleeves on the ends of cut-to-length plastic pipes, comprising a frame, a transverse conveyor for the plastic pipe, at least two tubes arranged in the frame along the transverse conveyor Devices, on the one hand, for heating the pipe end and, on the other hand, for expanding the heated pipe end into a sleeve, wherein each device has jaw dies which engage the pipe end around the outside, these jaw dies Compressible transversely to the conveying direction by means of an adjusting drive mounted in the frame, the device also comprises at least one middle mold axially insertable into the end of the tube for at least one of the devices. Background technique [0002] For thermoplastic pipes to be provided with a sleeve at one end, the end of the pipe to be enlarged into a sleeve is first heated and then enlarged, which requires some external jaw molds for forming and for enlarging or upsetting A heated tube end i...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this known device for forming sleeves is that the conversion to different tube sizes and sleeve sizes is relatively expensive

Although the space provided during conversion from a large diameter pipe to a small pipe diameter in order to increase production can be used to set up a double die for each of the two small diameter pipes instead of a die for a large pipe diameter, thereby in Twice as many small-diameter tubes with end sleeves can be produced in approximately the same cycle time, but the modification to be carried out by hand remains expensive

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