Plastic mould injection nozzle is used to connect to molding and metal injection molding machine accessories. Also can be described as is to make the molten plastic material from inside the nozzle of the injection molding machine is injected into the mold flow of parts. Let's look at the design of the plastic mold injection nozzle.
Nozzle opening general minimum of 3/16 inch (4.76 mm), had better choose 1/4 inch (6.4 mm) and 5/16 of an inch (7.9 mm) for weight in 12 pounds or more parts, suggest using 3/8 of an inch (9.5 mm) or greater nozzle hole. Transition section length is not more than 3/16 of an inch (4.76 mm). Minimum nozzle hole is 0.5 inches (12.7 mm). In order to get the best results, nozzle openings usually should be kept in the 1/32 of an inch (0.8 mm), "O" than that of the sprue bushing size or die hole size is smaller.
Accurate heat control and band heater full coverage, for it is necessary to maintain product appearance. If you need to increase nozzle, must make the band heater full coverage, this is the basic conditions to maintain good temperature control. Suggested that independent control of tip injection recommand band heater, it helps keep nozzle body suitable temperature, without overheating. Pick up on the same power band heater, must have the same wattage. If you use different wattage, must use a separate monitor control voltage and temperature. Do not recommend the use of special nozzle, such as: static mixer, intercepting type nozzle and folded filter, because, they exist Angle and high pressure drop zones, resulting in many molding problems. Intercepting type nozzle Suggestions for structural foam plastics and in the process of gas assisted molding processing.
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