Sand gate plate pressurizing seal device

Abstract

The invention discloses a sand gate plate pressurizing seal device. The sand gate plate pressurizing seal device comprises a sand hopper, a shooting barrel, a sand gate plate and a sand gate plate fixing base. An outlet in the lower end of the sand hopper communicates with an inlet in the upper end of the shooting barrel through the sand gate plate fixing base. The bottom end of the sand gate plate fixing base extends inwards to form a square-ring-shaped protrusion. The upper end face of the square-ring-shaped protrusion is provided with a sealing ring fixing groove. A sealing ring is fixed tothe sealing ring fixing groove. An opening is formed in one side wall of the sand gate plate fixing base. The sand gate plate is in sliding connection to the upper end face of the square-ring-shapedprotrusion in a drawing manner after entering an inner cavity of the sand gate plate fixing base through the opening. The top of the sand gate plate fixing base is provided with a plurality of holes communicating with the inner cavity. Pressing air cylinders with downward piston rods are arranged above the holes. The pressing air cylinders can downwards press the sand gate plate during sand shooting, the sand gate plate is tightly attached to the sealing ring so that the sealing performance during sand shooting through the shooting barrel can be improved, core sand leakage is prevented, core sand waste can be avoided, the sand shooting quality is guaranteed, and meanwhile influences on equipment usage and maintenance due to scattered core sand can be avoided.

Description

technical field [0001] The invention relates to the technical field of sand mold molding equipment, in particular to a pressure sealing device for a sand gate. Background technique [0002] The core shooting machine is a kind of equipment used to cast various sand cores. Its simple working process is: inject the core sand into the shooting barrel → inject the core sand into the core box through the injection head at the bottom → compress the air to make it shape →Blowing in curing gas→Demoulding after the core sand is solidified and formed→Move into the top core station and take out the core. [0003] When adding sand into the shot barrel, the sand gate between the sand bucket and the shot barrel will be opened, so that the core sand enters the shot barrel from the sand bucket; when the core sand in the shot barrel is shot into the core box, The sand gate needs to be returned to its original position, and the shot barrel should be sealed to prevent the core sand from being ...

AI Technical Summary

Problems solved by technology

However, the sealing effect of the sand ram in the prior art is often unsatisfactory, and the entrance of the shot barrel cannot be pressed tightly, so that the core sand leaks out, which not only causes waste of the core sand, but also affects the quality of the shot sand; in addition, the scattered core sand It will have a certain impact on the use and maintenance of the equipment

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