SU1516222A1 - Die-casting mould - Google Patents

Abstract

The invention relates to foundry, in particular to injection molds with pressure cutters. The purpose of the invention is to increase productivity. When the slab moves, the pulling-out protrusion with its groove 8 turns the knives by the shank and presses them with the cutting edge to the sprue. After the slab is moved by the amount of clearance, the ejectors act on the spring-loaded ejector. The sprues are trimmed. The return to the initial position of the knives is carried out due to the reverse stroke of the plate. Trimming the sprues during the ejection of the casting improves productivity, while increasing the service life of the blades, since they are not in contact with the melt. 9 il.

Description

The invention relates to foundry, in particular to injection molding.

The purpose of the invention is to increase productivity.

FIG. I shows the mold diagram at the moment of pressing; in fig. 2 shows a section A -A in FIG. one; in fig. 3 shows a section BB in FIG. 2; in fig. 4 is a diagram of the mold at the time when the knives are turned and where their cutting edges are located opposite the connection points of the casting with the sprue; in fig. 5 is a view of B in FIG. four; in fig. 6 - section G-Y in FIG. five; in fig. 7 is a diagram of the mold at the time of the separation of the sprues and ejection of the casting; in fig. 8 is a section d-d in FIG. 7; in fig. 9 is a section E - E of FIG. eight.

The mold contains a stationary half-form 1 and a movable half-form 2 with rotary knives 3 mounted on it with an inclined cutting edge 4 and with a shank 5.

The drive is made in the form of a pull-rod 6 installed on the ejection plate 7 and having a groove 8.

Additional ejector 9 spring-loaded and installed in the movable half-form coaxially and with a gap of 10 relative to the main ejector 11.

In the fixed form 1 made slots 12 for rotary knives 3.

The mold works as follows.

At the moment of the connection of the movable half-form 2 with the fixed half-form I, the pivoting knives 3 with the edge 4 enter the slots 12 of the fixed half-form.

After pressing in the melt and solidification of the metal, the mold is opened.

In this case, the movable half-form 2 moves to the left and the rotary knives 3 by the edge 4 emerge from the sockets 12 of the fixed half-form 1.

The hydraulic pusher of the maschine (not shown), rigidly fastened to the ejection plate 7, moves it to the right and, together with it, the pull 6, which through the groove 8 acts on the shank 5 and turns the knives 3.

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At the moment when the cutting edge 4 is positioned opposite the place of conjugation of the casting with the sprue, the shank 5 emerges from the slot of 8 tons 6, which continues to move with the ejection plate 7.

Upon further movement of the ejection plate 7, the main ejector 1 1, by selecting the gap 10, interact with the additional ejector 9, which pushes the casting through the edges 4 of the rotary knives 3.

Branch sprues out.

When moving the ejection plate 7 to its initial position, the ha ha 6 acts with its protrusion on the shank 5, which goes into the groove 8 and rotates the knives 3 to the initial position.

Then the cycle repeats.

The mold allows to reduce the technological cycle of casting and thereby increase the productivity of casting, as it does not require a double stroke of the mold when trimming sprues.

In addition, the life of the knives is increased, since their cutting edge does not come into contact with the melt.

Formula Invention

A die casting mold containing movable and fixed half-molds, an ejection plate with ejectors, a mechanism for separating sprues, made in the form of rotary knives with a shank and a cutting edge, and driving rotary knives, in order to increase productivity , she is

equipped with additional ejector - .1И, installed spring-loaded in the movable half-form coaxially and with a gap relative to the main ejector; swivel knife.

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Claims (1)

A mold for injection molding, containing a movable and fixed half-mold, an eject plate with ejectors θ, a gate separation mechanism made in the form of rotary knives with a shank and a cutting edge, and a rotary knife drive, characterized in that, in order to increase productivity, it 15 is equipped with additional ejectors installed spring-loaded in the movable half-mold coaxially and with a gap relative to the main ejectors, while the rotary knives are placed in the movable half-mold, and their drive is flax in the form of traction with a groove installed in the ejector plate with the possibility of interaction with the groove with the shank of the rotary knife.