SU1438960A1 - Mould with automatic removal of ingates - Google Patents

Abstract

The invention can be used in the design of molds for injection molding thermoplastics using sprues and their automatic removal. The form contains a fixed plate 1 with distributing gating channels, a movable plate of dies 5 with outlet channels of sprues, a movable plate of punches 10, a spring-loaded tear-off plate 4 for collecting sprues,

Description

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6 for locking the matrix plates and spring-loaded levers 2, which are hinged on the fixed plate. The levers 2 have thrust projections A located in the middle part of the part that hold the plate of the dies 5 from moving together with the tear-off plate 4 due to kinetic energy, while not interacting with the tear-off plate 4. When the shape is closed, the levers 2 turn under the action of the cams 9 installed on pl1

The invention relates to the processing of thermoplastic materials and can be used in engineering, light and local industries in the design of molds for thermoplastics using sprues and automatic. their removal.

The aim of the invention is to increase the reliability of removal of the gates in the automatic mode of operation of the form and to create a structure in which the kinetic energy acquired by the detachable plate does not cause the movement of the moving matrix.

FIG. 1 shows the shape, general appearance; in fig. 2 - the same, in the open position.

The form contains a stationary plate 1 with diverting gating channels (Fig. 2), levers 2 with stop projections A and beveled surfaces B, pressed by springs 3, a tear plate 4, a movable plate 5 of matrices with inlet gating holes, 6 , springs 7 moving the relief plate 4, step screws 8 for limiting the movement of the relief plate 4, cams .9 rigidly fastened to the movable plate 10 of the punches and interacting with the levers 2.

The form works as follows.

After injection of the molten material into the forming cavity and the corresponding lug shape is opened along the plane I-I (figure 1). In this case, the levers 2 (Figures 1 and 2) rotate

those of the punches 10 and the withdrawal of the thrust projections A from the gap between the plates. The use of thrust levers avoids the movement of the die together with the spring-loaded tear-off plate due to the kinetic energy that the tear-off plate acquires in the process of resetting the sprues, and thus avoiding the possible clamping of the sprues between the tear-off plate and the fixed slab. 2 Il.

under the action of the springs 3 and the plant t, the protrusions A in the resulting gap between the plates 1 and 5 ..

After the mold has been opened by the value L (Fig. 1), the movement of the plate 5 of the matrix is suspended by ga 6. The detached sprues are dropped by the tear-off plate 4 under the action of the springs 7.

The movement of the plate 5 of the matrix together with the tear-off plate 4, resulting from the kinetic energy acquired by the tear-off plate 4, is obstructed by the protrusions A of the levers 2, which ensures reliable discharge of the sprues. Upon further disclosure of the form along the plane I1-II (FIG. 1), the product is pushed from the punch.

In the process of closing the molds, the levers 2 abut against the beveled surfaces B into the cams 9, mounted on the plate 10 of the punches, and turn, withdrawing the thrust projections A from the gap between the plates 1 and 5.

In the following, the cycle repeats.

Claims (1)

The use of the invention allows to make the form more compact, reduce the laboriousness of its manufacture and repair, increase the reliability of sprue removal and, thus, increase the reliability of the entire automatic casting cycle. Invention Formula Die casting mold with automatic sprue removal, containing a fixed slab with parting bars 1438960 movable plate of dies, equipped with spring-loaded levers, movable plate of punches with fortified pivotally mounted on fixed cams, ti for locking the plates of the mold, characterized in that, in order to increase the reliability of removing the gates in automatic operation mode , the form plate, having thrust projections, g made with the possibility of interaction with the plate of matrices, and bevels made with the possibility of interaction with the cams. Yu equipped with spring-loaded levers pivotally mounted on a fixed plate, having thrust projections adapted to interact with the matrix plate, and bevels adapted to interact with the cams. 2.