SU1719150A1 - Installation for making casting molds and cores - Google Patents

Abstract

The invention relates to foundry, in particular to the manufacture of foundry molds and cores. The purpose of the invention is to improve the quality of forms and plant performance. The installation comprises a frame 1, on which a bottom plate 2 with guide barrels 3 is installed, a top plate 4 with cylinders 5, a hopper 7 for molding sand. Between the upper 4 and lower 2 plates, there is installed a gate 8 with conical holes 9, interconnected with the drive 10 and the vibrator 11. The mixture from the hopper 7 enters the holes 9 of the gate 8, after which the gate 8 drives 10 to the right until the gate coincides mi guide barrels. 3 and cylinders 5. Then, the valves 6 installed in the working cavities 5 are opened and the mixture packs are pushed out of the holes 9 by compressed air through the nozzles 3 into the mold. 1 il.

Description

The invention relates to foundry, in particular to the manufacture of foundry molds and cores.

A known apparatus for the manufacture of casting molds and cores, comprising a working tank, a sandblasted nozzle with an inflatable slab and dividers, a lifting table, a feed hopper for the mixture, a receiver of compressed air and a frame.

Closest to the proposed object is a multi-disc sandblasting head containing a bunker and a throwing head. The throwing head is made in the form of a rotating shaft with peskometnymi and ventilation discs attached to it.

The disadvantages of the installation are the low quality of the seal due to the uneven movement of the throwing head and low productivity.

The purpose of the invention is to improve the quality of forms and increase plant productivity.

This goal is achieved by the fact that the installation for the manufacture of casting molds and cores, comprising a hopper and a throwing head, is equipped with a vibrator and a gate, the vibrator is placed on the gate, the throwing head is made in the form of two parallel plates with holes, the bottom plate is provided with guide shafts top - working cavities with pneumatic valves

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coaxially mounted holes, the gate being located between the plates and conical holes in it.

The drawing shows, installation, general view,

The plant for manufacturing casting molds and cores comprises a frame 1 on which a bottom plate 2 with guide barrels 3 is installed, a top plate 4 with working cavities 5 and valves 6, a bunker 7 for molding sand. Between the plates 2 and 4, there is installed a gate 8 with conical holes 9. The gate is interconnected with the drive 10 and the vibrator 11. At the working cavities 5 there are splitters 12.

The installation works as follows.

The molding mixture from the hopper 7 through the holes in the top plate 4 enters the conical holes 9. The gateway 8, under the action of the actuator 10, is shifted to the right until the axes of the holes 9 coincide with the axes of the working cavities 5 and the guide barrels 3. and the molding mixture is pushed out by compressed air through the guide barrels 3 into the mold. Then the gate 8 returns to its original position and the cycle repeats. Vibration of the gate 8 is carried out by the vibrator 11, improves the uniformity of filling the molding mixture with the holes 9, creates a preliminary seal of the mixture bag and reduces the force when moving the gate 8. The taper of the holes 9 prevents the mixture bag from falling out before opening the valve 6. And also creates an additional seal of the bag mixture when pushed out with compressed air.

Claims (1)

Invention Formula A plant for the manufacture of casting molds and cores, comprising a chute hopper and a throwing head located under the hopper, characterized in that, in order to improve the quality of the shapes and increase productivity, the throwing head consists of two parallel plates, the upper of which has openings passing the mixture, coaxial with the chutes of the bunker, and exhaust holes, above each of which a cylinder is installed with a valve fixed on its stem, and the bottom plate has holes that are coaxial with the exhaust holes in the upper plate, and guide barrels fixed on its lower surface, as well as a drive gate with a vibrator located between the plates and having conical holes coaxial with the holes for passing the mixture of the upper plate.