RIM processes are often used for two-component liquid are stored at a temperature in the reservoir 2, the reservoir is generally a pressure vessel. When not in MASTER thin wall moulding, usually liquid at low pressure 0.2 ~ 0.3 MPa under the reservoir, heat MASTER plastic mold company and the mixing head in a continuous loop. Polyurethane, the liquid temperature is generally 20 ~ 40 ℃, temperature control accuracy of ± 1 ℃.
Two component liquid is generally MASTER chair mould by the hydraulic system to complete hydraulic system consists of pumps, valves and accessories (control liquid materials distribution pipeline system and control the work of the cylinder oil system) formed. After injection need MASTER injection mould design voltage switching means to the injection pressure is converted to the desired pressure. Hydraulic pump liquid quantitatively measured output, requiring measurement accuracy of at least ± 1.5%, the best control in ± 1%.
The utility model relates to a plastic polyurethane reaction injection molding industry. The A, B tank, metering pump, and the injection head and the conveying conduit is disposed MASTER wheel covers molding the mold holder constituting the injection head, the A, B disposed above the feed tank and metering pump are encapsulated together with the conveying line a heater casing with insulation, the insulation housing is MASTER injection mold maker in the mold base. reaction injection moulding small timber with low power consumption, manufacturing cost is low, and the injection of more reliable quality advantages. Can replace the existing layout style polyurethane reaction injection molding.
reaction injection moulding technology is the first fiber MASTER plastic pallet mould in the mold cavity, and then injected into the liquid resin. The disadvantage is the need to pre-process the fiber mat, so that the process becomes complicated and increases the cost. In addition, as laying MASTER custom plastic mold felt the need to manually perform, but also greatly increased the labor intensity. Based on this, but also spawned a variable fiber reaction injection molding.
