SU887218A1 - Injection mould - Google Patents

Description

(54) PRESS FORM

The invention relates to the field of plastics processing, in particular to the manufacture of multi-piece tooling with dumping devices of finished products.

A known mold comprising 5 half-molds, a final product ejector, made in the form of a bar mounted above the matrix plate, with the possibility of rotation of the axis passing through the matrix plate, and the mechanism of rotation of the ejector, O made in the form of a shear ejector firmly connected to the axis and interacting with her spring-loaded toothed rack 1. In this case, the drive for moving the toothed rack is made in the form of a piston, 15 mounted on the end of the toothed rack, and a spring-loaded spool placed in the base plate and the die plate and oobschayuschegos with porschnem channels.

The design of the mechanism of rotation of the retrac- tor, made in the form of a rack pair, requires an additional drive to move the toothed rack, which complicates the design and increases the metal consumption of the mold.

Known, which is closest to the proposed one, the mold for the manufacture of products from polymeric materials, containing movable and fixed half-forms, a guide column, 30

an ejection plate and an ejection plate, connected with the ejection plate, and a rotary dump bar connected to its rotation mechanism, including a sleeve disposed on the ejection plate with a pin cooperating with the screw groove of the rotation mechanism 2.

In this mold, the rotation mechanism is taken out of the mold, which increases its dimensions.

The aim of the invention is to reduce the size of the mold.

This is achieved by the fact that in a mold containing movable and stationary half-molds, a guide column, an ejection plate and an ejection plate connected with the plate of removal and a rotary discharge bar, which is connected to the mechanism of its rotation, is located on the ejection plate a sleeve with a coupling interacting with the screw groove of the rotation mechanism according to the invention, the sleeve is mounted on the guide column, and the screw groove is made on the side surface of the guide column.

To increase the reliability of the mold when it is closed, the sleeve is made with an emphasis in the form of a cone, the height of which exceeds the thickness of the

slats, and in the fixed half-form you have a locking groove for the stop.

FIG. 1 shows a movable half-form in plan; in fig. 2 - fixed half-form in plan; in fig. 3 is a section A-A of the mold in FIG. one.

The mold consists of a fixed half-form 1 with a fixing groove 2 and a movable half-form 3. The mobile half-form 3 contains a removable plate 4, a guide column 5 with a screw groove 6, resetting the bar 7 connected to the sleeve 8 with a pin 9 and a conical stop 10, mounted on the surface of the stripping plate 4, with a concentric column 5, forming marks 11 and an ejection plate 12 with trs 13.

The mold works as follows.

When opening the mold and moving the movable half-form, 3 design; marks 11 remove the products from the fixed half-form 1. Then the ejection plate 12 stops with the machine stop (not shown in fig.) and the removal plate 4 removes the products from the design signs I. At the same time, the removal plate 4 moves along the guide column 5 the sleeve 8 from the resetting bar 7. The pin 9, interacting with the screw groove 6, turns the sleeve 8, and after the products are removed with the removal plate 4 from the design characters II, the resetting bar 7 drops them from the surface of the removal plate 4.

When the mold is closed due to the interaction of the pin 9 with the screw groove 6 and the conical stop 10 with the fixed half-form 1, the sleeve 8 rotates in the opposite direction. When this conical stop 10 falls into the locking groove 2 of the fixed half of the form 1 and centers the discharge bar 7 in the initial position. The mold closes and the whole cycle repeats again.

The use of this invention will reduce the size of the mold, since the dumping device is not carried out of the mold, reduces its intensity and increases its reliability in operation.

Claims (2)

1. A press mold for the manufacture of products from polymeric materials, containing movable and fixed half-molds, a guide column, a removal plate and an ejection plate connected with the removal plate, and a rotary discharge bar connected to its rotation mechanism, including located on the removal plate is a sleeve with a coupling interacting with a screw groove, a turning mechanism, characterized in that, in order to reduce the dimensions of the mold, the sleeve is mounted on the guide column, and the screw groove is made on the side surface style guide column. 2. A mold according to claim 1, characterized in that, in order to increase reliability in the operation of the mold during closure, the sleeve is made with an emphasis in the form of a cone, the height of which exceeds the thickness of the drop bar, and in a fixed half-form a fixing groove under the support. Sources of information taken into account during the examination: 1. USSR author's certificate number 587006, cl. B 29 C 5/00, 1976. 2. USSR author's certificate according to application No. 2830797 / 23-05, B 29 C 5UOO, 1979 (prototype). I / X N „-F- i t- .j- v-iziizi .-- Znv {l ..