Local insufficient heating temperature too much local draw ratio Lower the problem section temperature improve the ventingīlow earlier and adjust the heating temperature Improve the blow mold venting improve the blow mold cooling fix the blow mold īottle circumferential uneven wall thickness. Insufficient air pressure and air volume poor venting of blow mold Īdjust the PET preform temperature increase the air pressure and air Too high heating temperature local cold slug Preform body insufficient extending on the vertical direction Lower the preform bottom heating temperature. Misalignment of blow pin the bottle bottom ĭistance between blow pin and bottle bottom over 1.5 mm Īdjust the distance between blow pin and bottle bottom to be 1.5mm or smaller Too high preform bottom temperature too low preform temperature severe decompositionĬheck and change the preform and material,improve the drying Verify the PET preform even soften by 100 C water. Increase the temperature of the PET preform Insufficient heating temperature injection fault of PET preform
Increase the PET preform heating temperature and even the all body temperature Insufficient PET preform heating temperature Lower the temperature,especially on the bend section. Pre-long the cooling time clean the cooling line Įccentric temperature adjust orifice uneven density of PET preform įix the PET preform mold fix temperature adjust base Lower hold pressure increase the injection speed Improve the cooling clean the screw increase the hold pressure Too short injection time too short hold time Improve the accuracy and use adjustable core and cavity. Short fill or welt line on the neck of PET preform Increase the injection speed or prelong the injection time Misalignment of hot runner nozzle and gate Vapor condensation in the core and cavity Lower drying temperature and prelong drying time Sliver streaking or yellowing of PET preform
Lower the hold pressure fix the PET preform mold Improve the cooling and make the wall thinner Verify the drying temperature and shot volume, drying temperature 165 ℃ and moisture<0.02% Increase the PET material heating temperature Too low temperature of nozzle of hot runner And will will waste lots of raw material if the preforms getting yellow (over melted or burned ).īelow table list is the PET preform injection molding troubleshooting guide for your further information: Defects / Problems
It may cause failed to bottle blowing if there are pet preform defects like the moisture not match the requirement( PET heating temperature is not collect). As the PET preforms`s quality affects a lot in the following step PET preform blowing process. PET preform injection molding troubleshooting is very important during the whole PET bottles making process. High intrinsic viscosity levels and low acetaldehyde levels ĩ.Plastic PET Preform Injection Molding Troubleshooting Our plastic bottle preforms have passed the national QS certification, with certificate issued by sanitary department.Īll PET preforms can be made in different colors like dark blue, light blue, ocean blue, green, amber etc.
PET PREFORM BOTTLE FULL
Using for blowing or making 5 gallon water bottle ĭouble-corrugated paper carton & Plastic film bag Įach preform packed with a film bag 25pcs per carton ĭrinkPack offers a full assortment of PET bottle preforms which suite for various applications like drinking water, carbonated soft drinks, hot fill / warm fill juice based beverages, edible oil, detergents etc.
0 kommentar(er)
