SU1351805A1 - Die-casting mould for compacting polymeric materials - Google Patents

Abstract

The invention relates to molds for the manufacture of polymer products by plastic deformation. The mold contains the upper 1 and lower 2 semi-matrix, coaxially installed in the upper semi-matrix 1 movable in the axial direction /////////. bushing 4 and punch 3. Increasing productivity by pressing at one time, the mold is fitted coaxially outside the bushing with a spring-loaded sleeve 5, which is axially movable, and at the upper ends of the sleeve 5 and bushing 4, the stop and protrusion located at different ends height to ensure free running of the sleeve 4. In the process of pressing the workpiece when lowering the punch 3, the sleeve 4 rises deformable material upwards. From the moment of its protrusion with the support of the sleeve 5 p The displacement of the latter is limited by the spring 6. When the sleeve 4 stops in the step of the punch 3, it begins to lower together with the punch and further with the sleeve, to press the workpiece. After removal of the lower half-matrix 2, the product is removed with the help of a spring 6. 4 il. // u // i (About with SP 00 about SP

Description

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The invention relates to the processing of polymeric materials by plastic deformation and can be used for pressing polymer blanks.

The aim of the invention is to increase productivity by performing pressing at one time.

FIG. 1 shows a mold at the initial moment of pressing; Figs 2 and 3 show intermediate pressing steps; in fig. 4 - mold at the final moment of pressing.

The mold contains upper 1 and lower 2 semi-matrices, punch 3 and a movable sleeve 4 mounted coaxially with it, which is made with a protrusion on the external surface to interact with the abutment of the installed coaxially sleeve 5, pressed by spring 6 to the lower semi-matrix 2.

The mold works as follows.

The heated billet is installed in the working cavity of the sleeve 4. By moving the punch 3 down, the billet is deposited to the diameter Dj. Spring 6 prevents the sleeve 5 from moving upwards due to the contact friction forces on the surface of diameter D. At the end of the stroke, the support of the sleeve 4 interacts with the protrusion of the sleeve 5 and move ////// // A //////////

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With it, it coincides with the step of the punch 3. In this case, under the sleeve 5, an annular internal cavity is released into which the material is inserted during the further course of the punch 3 and sleeve 4. The sleeve 5 overcomes the contact friction forces of the surfaces of diameters D and D, the compression force springs 6 and moves upwards. The workpiece is deposited to the diameter D. After removal of the lower half of the bed 2, the spring 6 pushes the part.

15 F o rmula of the invention

A mold for pressing poly-MepHbix materials, containing upper and lower semi-matrices, coaxially mounted in the upper semi-matrix an axially movable sleeve and punch, characterized in that, in order to increase productivity by performing pressing at one time, it is equipped with an installed coaxially outside the sleeve, a spring-loaded sleeve that moves axially, and at the upper ends of the sleeve and the sleeve, respectively, the stop and the protrusion are arranged at different heights to ensure free running and ki

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Claims (1)

15 Formula of the invention A mold for pressing polymer materials containing an upper and lower half-matrix, axially movable sleeve and punch coaxially mounted in the upper half-matrix, characterized in that, in order to increase productivity by holding 25 pressing in one step, it is equipped with a spring loaded sleeve coaxially mounted coaxially on the outside of the sleeve, movable in the axial direction, and at the upper ends of the sleeve and sleeve 30, respectively, an abutment and a protrusion arranged at different heights to ensure free movement of the sleeve.