SU1177045A1 - Pressing unit of machine for injection-die casting - Google Patents

Abstract

1. KNOT OF PRESSING OF THE RABBIT CASTING UNDER PRESSURE, comprising a pressing chamber, a press piston and a counter piston mounted for movement along the pressing chamber, characterized in that, in order to simplify the design and increase the productivity of labor, the counter piston is movably connected to the press piston by means of the rod, with a guide groove under the rod in the pressing chamber. 2. A pressing unit according to claim 1, characterized in that the pressurization unit is provided with a length-adjustable stop interacting with the thrust. sl o sd

Description

The invention relates to foundry, in particular to injection molding on machines with a horizontal pressing chamber.

The purpose of the invention is to simplify the design of the pressing unit and increase labor productivity.

This goal is achieved by the fact that the counter piston is movably connected to the press piston by means of a thrust installed in a longitudinal groove made in the pressing chamber, and the press piston is equipped with a length-adjustable stop interacting with the thrust. fifteen

In FIG. 1 is a schematic representation of a pressing unit; in FIG. 2 is a section AA in FIG. 1.

The pressing unit of the injection molding machine comprises a pressing chamber 1 20, a pressing piston 2 located therein, a sprue sleeve 3, a counter piston 4, movably connected through a rod 5 installed in a longitudinal groove 6 with a pressing piston 25 2. An adjustable stop 7 is fixed to the piston The metal in the pressing chamber 1 is fed from the crucible 8 through the metal wire 9.

The pressing unit operates as follows - ₃ q as follows.

After the mold is closed, liquid metal is fed from the crucible 8 through the metal pipe 9 into the cavity of the pressing chamber 1, which is limited by a press piston 2 and a counter piston 4. When the pressing mechanism is activated, the press piston 2 _} moving along the pressing chamber 1 compresses the metered volume of metal and moves the counter piston 4 through it into the movable half-mold through it. In this case, the counter-piston 4 enters the hole made in the movable half-mold, opening the sprue channel 10. Metal under pressure, the press-piston fills the mold cavity.

After crystallization of the casting, the mold opens, while the counter piston 4 together with the press remain moves with the movable half-mold until the collar 11 of the rod engages in the adjustable stop 7 of the press piston 2. The counter piston remains in place during further movement of the movable half-mold , automatically produces a gate cover with a press residue. When returning to the initial position, the press piston 2 pulls a counter piston 4, the mutual arrangement of which, regulated by the stop 7, and forms a measured dose.

EFFECT: invention enables to increase labor productivity by 10% due to automatic sprue fragments.

Figure 2

Claims (2)

1. PRESSING NODE OF THE INJECTION MOLDING MACHINE, comprising a pressing chamber, a press piston and a counter piston mounted for movement along the pressing chamber, characterized in that, in order to simplify the design and increase productivity ,. the counter piston is movably connected to the press piston by means of a thrust, and a guide groove for the thrust is made in the pressing chamber. 2. The pressing unit according to claim 1, characterized in that the press is equipped with a length-adjustable stop interacting with the thrust. FIG. f