when the temperature rising in the exit but this is what the normal temperature increase of more than 20 degrees
1, your machine back pressure regulation is too large; 2, screw idle or slip, cause melt time longer, friction produce heat; 3, setting temperature is too low, melt resistance is too large, friction produce heat;
PVC for the temperature requirements are very strict, the back pressure is small, hard PVC temperature can not too low at about 170-190, too low, but not good, there is a delay melt, namely the screw does not move after injection, on the verge of opening a few seconds before time began to melt, melt after 10 seconds to stop the opening of concrete how much time delay according to the time you began to melt cooling and temperature control, there is a nozzle to just not cured so far, should not be too high. This basically can control the temperature, can be controlled within 8 degrees.
1, back pressure regulation is too large; 2, screw idle or slip, cause melt time longer, friction produce heat; 3, setting temperature is too low, melt resistance is too large, friction produce heat.Injection molding machine: injection molding machine, also known as injection molding machine or injection machine. It is a thermoplastic or thermosetting plastic plastic molding mold made of plastic products of all shapes of the main molding equipment. The injection molding machine heats the plastic, applying high pressure to the molten plastic to make it crack and fill the mold cavity. According to the arrangement of injection device and mould locking device, they can be divided into vertical type, horizontal type and vertical horizontal compound type.
