The roller sand mixer is an efficient, low consumption, and novel structure sand mixer, as shown in Figure 1. The sand mixer adopts new structures and materials such as spring pressure device, centralized lubrication, diabase cast stone protective plate, tungsten carbide alloy overlay scraper, etc. It has played an important role in ensuring the quality of molding sand, improving productivity, and increasing service life. This sand mixer has strong adaptability and wide applications. Mainly used for mixing clay type sand in casting workshops. It can mix single sand for machine molding, as well as dry sand, self hardening sand, surface sand, and core sand; It is also suitable for mixing various powder and granular materials in industries such as glass, ceramics, and refractory materials.