In the process of processing injection molding, whether the temperature is set accurately is the key to the appearance and performance of the product. The following are some suggestions for temperature setting during tpr processing and injection molding.
The temperature of the feed area should be set to be relatively low to avoid blockage of the feed inlet and to allow entrained air to escape. In order to improve the mixing state when using color masterbatch, the temperature of the transition region should be set above the melting point of the color masterbatch. The temperature of the area closest to the injection nozzle should be set close to the desired melt temperature. Therefore, after testing, the temperature setting range of tpr products in each area is usually 160℃ to 210℃ for the charging barrel and 180℃ to 230℃ for the nozzle.
The mold temperature should be set to be higher than the condensation temperature in the injection molding area, which will prevent the contamination of the mold by moisture and the occurrence of streaks on the surface of the product. Higher mold temperature usually results in longer cycle time, but it can improve the appearance effect of welding lines and products, so the mold temperature should be designed in the range of 30 to 40.
