Calibrating plate for an extrusion tool for manufacturing plastic profiles

Abstract

The invention relates to a calibrating plate for an extrusion die for producing plastic profiles, comprising a substantially plate-shaped basic body ( 21 ), in which an opening ( 22 ) for guiding and calibrating the plastic profile ( 23 ) to be produced is provided, with at least one insert part ( 1 ) made of a material with high hardness being inserted into the basic body ( 21 ), which insert part comprises at least one holding section ( 2 ) and a shaping section ( 3 ), with both the holding section ( 2 ) as well as the shaping section ( 3 ) being formed partly as cylindrical surfaces with generatrices parallel to the extrusion axis ( 6 ), and with the insert part ( 1 ) being held in the axial direction in the plate-shaped basic body ( 21 ) by a delimiting stop ( 5 ). A longer service life and a simpler adjustment can be achieved in such a way that the holding section ( 2 ) comprises a groove ( 4 ) which extends in the direction of extrusion ( 6 a), and that the delimitation stop ( 5 ) is arranged at one end of the groove ( 4 ), which stop protrudes from the groove ( 4 ).

Description

technical field [0001] The invention relates to a sizing plate applied to an extrusion die for the manufacture of plastic profiles, comprising a substantially plate-shaped base with a hole for guiding and shaping the produced plastic profiles, made of high hardness At least one insert element inserted into the base body made of material, the insert element comprising at least one retaining part and a forming part, both retaining part and forming part locally form a cylindrical surface whose generatrix is ​​parallel to the axis of extrusion, the insert element passes through a The limiting stop blocks are axially fixed on the plate-shaped base. Background technique [0002] The service life of general sizing tools and special sizing plates is mainly determined by the wear and tear strength of critical parts of the profile shape. Such critical parts are in particular grooves, which are used, for example, as receiving seals. The protruding part of the calibrating plate, which...

AI Technical Summary

Problems solved by technology

It can be seen that in the event of production tolerances, since highly wear-resistant parts cannot be completely avoided, loosening of the position of the insert element may occur, which is obviously undesirable

In particular, there is a slight pivoting on the longitudinal axis, which leads to a reduction in the quality of the profile and shortens the service life of the mould, since the guide elements have been destroyed

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