RU2043851C1 - Device for partition of remainder of billet from foundry gate - Google Patents

Abstract

FIELD: foundry. SUBSTANCE: device for partition of remainder of billet has immovable plate, plate of foundry cone related to matrix-plate being a part of mold, L-shaped plate to detach remainder of billet. Slot-like cavity is made in foundry cone plate, and L-shaped plate is located in it and may incompletely come out of the cavity when the mold is open. EFFECT: high productivity. 4 dwg

Description

 The present invention relates to injection molding, in particular to injection molding of non-ferrous metals and alloys on machines with a horizontal pressing chamber and a central melt supply.

A device for separating the press residue from the central gate, containing a movable plate with a gating sleeve, the end face of which is made in the form of a screw ledge, and grooves are made in the front of the pressing chamber with a twisting direction opposite to the direction of twisting of the screw ledge on the gating bush [1]
The disadvantage of this device is the unreliability in operation, since the metal poured into the grooves, due to insufficient rigidity at the temperature of the mold connector, can be cut off and the gate will not come off from the press residue.

It is also known a device for separating the press residue from the central gate, containing a movable plate, a knife with a cutout for trimming the gate, a mounting plate, guide columns, an inclined finger and a gate glass [2]
The specified device is of considerable complexity. The above devices, in addition, are designed to separate the press residue from the central gate and cannot be used to separate the press residue directly from the casting in the case of the implementation of this casting option.

 The closest to the proposed invention in technical essence and the achieved result is a node for removing the press residue from the casting [3] This device contains a plate for attaching a fixed half-mold with a gating sleeve and a tear plate with a bevel on the end, entering the cavity of the gating sleeve installed in the mounting plate with the possibility of limited movement along the axis of the form.

 The disadvantage is that the tear-off plate in this device is installed without reliable fixation both in the fastener plate and in the cavity of the injection sleeve, which requires increased clearances in the guide grooves of the fastener plate. These gaps at the next injection will melt, which will make it difficult to obtain subsequent castings. Reducing the gaps can lead to breakage of the form during operation.

 The aim of the invention is to increase the reliability and durability of the form.

 This goal is achieved in that the device for separating the press residue from the central gate, containing a fixed mounting plate, a L-shaped plate for tearing the press residue with a bevel at the end, installed in the mounting plate with limited movement along the axis of the mold, is provided with a slit-like cavity in the gating cone plate, and the L-shaped plate is placed in the slit-like cavity with the possibility of incomplete exit from it when the form is opened.

 Figure 1 shows a longitudinal section of a device for separating press residues in the position of complete closure of the form; figure 2 the same, when not fully open form; figure 3 section aa in figure 1; figure 4 section BB in figure 2.

 The device for separating the press residue comprises a fixed plate 1 and a cone plate 2 connected to the matrix plate 3, which is included directly in the mold design. A holder 4 with limited longitudinal mobility is mounted in the fixed-shape socket 1, to which, with the help of pins 5, a L-shaped plate 6 is inserted, which enters the slot made in the cone plate 2 (Fig. 4). Plates 1 and 2 are connected by a remote rod 7.

 The separation device of the press residue operates as follows.

 After pressing the melt, cooling and crystallization of the casting, the opening of the mold begins. In this case, the matrix plate 3, together with the plate 2, the press residue, the plate 6 and the holder 4, is relegated to the left until the collar of the holder 4 touches the stop in the socket of the plate 1. At this point, the cylindrical part of the press residue is freed from the injection sleeve, and the press residue can no longer move to the left, since it is held by the inclined end of the plate 6. The matrix plate 3 continues to move to the left, tears the casting off the press residue and completely releases it from the gate cone, allowing it to fall into the gap between the plates s 1 and 2 the gap. When you take the plate 2 to the left, the back of the plate 6 remains in the slit of the plate 2, which facilitates the orientation of the plate 6 when closing the form. (In this paper, we do not consider the problem of removing the casting from the mold).

Claims (1)

 DEVICE FOR SEPARATING THE PRESS REMAINING FROM THE CENTRAL GATE ON THE CASTING MACHINE UNDER PRESSURE, containing a fixed mounting plate, a L-shaped plate for tearing the press residue, having a bevel at the end and mounted in the mounting plate with the ability to move perpendicular to the plane of the mold connector, the plate sprue cone, characterized in that a slit-shaped cavity is made in the sprue cone plate, and the L-shaped plate is placed in the slit-like cavity with the possibility of incomplete exit from it when the form is opened.

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