Resin II injection method and device for reducing valve jamming

Abstract

The invention discloses a resin II injection method for reducing valve jamming, relates to the technical field of resin II injection equipment, and solves the technical problem that a valve is easy tojam. The method comprises the following steps: enabling resin II from the valve to pass through a bent pipeline, and then injecting the resin II into an injection pipeline communicating with a rollersand machine. The invention further discloses a resin II injection device for reducing valve jamming. The method and the device can effectively reduce the risk of valve jamming, reduce the wall-sticking resin II, and prevent the resin II from hardening, thereby effectively reducing the risk of blockage of the injection pipeline.

Description

technical field

[0001] The invention relates to the technical field of resin II injection equipment, more specifically, it relates to a resin II injection method and device for reducing valve jamming. Background technique

[0002] The cold box method is a high-efficiency core-making process. Compared with the hot box method and the shell core method, it has the advantages of high efficiency, energy saving, and good working conditions. It has been widely used in foundry production. Among them, the most commonly used binders used in the triethylamine method are resin I (phenolic resin) and resin II (polyisocyanate mixture). Among them, resin II is very easy to react with water, the viscosity increases, and insoluble ureas are formed. The existing cold box roller sand machine resin II injection system generally uses a pneumatic diaphragm valve or a pneumatic angle seat valve as the valve of the injection pipeline, and a straight pipe behind the valve directly leads into the ro...

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