Cast polyurethane products are a type of product manufactured by pouring liquid polyurethane, which has higher mechanical strength (2-3 times that of natural rubber) compared to ordinary rubber; Wear resistance (5-10 times that of natural rubber); Excellent oil and solvent resistance, outstanding oxygen and ozone resistance, smooth, smooth, and delicate surface, uniform appearance color, wide hardness range, and high elasticity even at high hardness (a characteristic not found in other types of adhesives); High surface smoothness; Superior mechanical processing performance; The bonding strength with metal is also much higher than other rubbers. Through molecular structure design, a series of polyurethane elastomers with different hardness can be obtained. [0004] Polyurethane rubber wheels prepared from polyurethane elastomers have been widely used in various industries due to their high wear resistance, high elasticity, low operating noise, and high tensile strength. [0005] However, with the development of technology, people have put forward stricter requirements for polyurethane rubber wheels in terms of energy saving, low noise, environmental protection, etc. The original single hardness polyurethane rubber wheels can no longer meet the special requirements of some customers. For example, the polyurethane rubber wheels used for lifting require significant friction and cannot deform excessively; The polyurethane rubber wheels required for the conveyor line require good cushioning performance as well as good wear resistance.
The use of polyurethane elastomer as the wheel body greatly improves the wear resistance of the wheel body. At the same time, the use of plastic material as the wheel core can automate production, greatly improving production efficiency and reducing production costs. The polyurethane elastomer is fastened to the outer circumferential surface, outer circumference, and several holes of the plastic wheel core to effectively overcome the debonding defect between the polyurethane elastomer and the wheel core. The ventilation cooling holes and convex rib structure can effectively reduce the temperature during the operation of the polyurethane rubber wheel. In summary, long-life polyurethane rubber wheels have good mechanical strength, large ventilation and cooling area, and the polyurethane elastomer is firmly and reliably combined with the plastic wheel core or metal wheel core. Several holes around the outer circumference are fastened to the polyurethane elastomer to effectively overcome the debonding defect between the polyurethane elastomer and the wheel core. Longevity polyurethane rubber wheels have good mechanical strength, and the combination of polyurethane elastomer 2 and wheel core 1 is firm and reliable, without delamination.