‌Warm core box core shooting machine

The working principle of the warm core box core shooter is an improvement on the hot core box method. It uses a core box heated to a certain temperature, usually around 175°C to 200°C. The core concept of this method is to shoot a sand mixture made by mixing casting sand, thermosetting resin and curing agent into a heated core box. The purpose of heating is to heat the sand material close to the surface of the core box. Under the action of temperature, the binder of the thermosetting resin condenses and hardens in a very short time to form a core. This hardening process does not require the sand core to be dried in a drying oven, thereby shortening the production cycle. The advantage of the warm core box core shooter is that it can quickly produce medium and small sand cores with high dimensional accuracy. As long as the surface of the sand core has a hard shell of 5-10 mm, it can be taken out of the core box. The core sand in the center part can harden itself under the action of residual heat and the heat released by the hardening reaction, providing a very effective method for rapid production.