Katere so pogoste napake vročega tekaškega sistema?

Pogoste napake vročega sistema tekačev so naslednje:
Odpoved temperature
Temperature is too high: It may be a thermostat failure, such as damage to internal electronic components, resulting in abnormal control of the heating element, causing the temperature to continue to rise. A short circuit in the heating element can also cause this situation, such as damage to the insulation layer of the heating rod, abnormal increase in current, and excessive heat generation. In addition, improper installation of Termoelement, ki ne more natančno izmeriti dejanske temperature, lahko povzroči tudi napačno presojo termostata, nenehno ogrevanje
Temperature is too low: The reason may be aging or damage to the heating element, such as the resistance of the heating coil increases and the heating power decreases after long-term use. Thermocouple failures, such as line disconnection and poor contact, will prevent the thermostat from receiving accurate temperature signals, thereby erroneously reducing the heating output. In addition, power supply system Napake, kot so nestabilna napajalna napetost in fazno izgubo, lahko privedejo tudi do nezadostne ogrevalne energije in povzročijo nizke temperature .
Okvara pretoka plastične taline
Blokava tekača: Običajno jo povzročajo nečistoče in tuje snovi v plastičnih delcih, ki vstopajo v vročega tekača, ali plastika ostane v tekaču že dolgo, karbonizira in aglomerira, kar ovira normalen pretok taline . poleg tega lahko nerazumni oblikovanje kanalov in ozki deli blokade materiala.
Melt leakage: Aging and damage of seals are common causes of melt leakage, such as the loss of elasticity and cracks of the sealing ring, which cannot be effectively sealed. Improper installation of components of the hot runner system, such as uneven tightening force of bolts, resulting in gaps between components, can also cause melt leakage. In addition, cracks in the Pretočni kanal zaradi dolgoročne toplote in tlaka lahko povzroči tudi uhajanje taline .
Uneven flow rate: This may be due to uneven temperatures in various heating areas of the hot runner system, resulting in inconsistent viscosity of the plastic melt, thus affecting the flow rate. Unreasonable flow channel layout, such as large differences in the length and diameter of each branch flow channel, can also cause different flow rates of the melt in different flow channels. In addition, improper hot nozzle Oblika, kot sta neskladna velikost šobe in nepravilna oblika kanala pretoka, lahko povzroči tudi neenakomerno pretok .
Vroča okvara šobe
Zamakanje vroče šobe: To je lahko posledica nečistoč v plastični talini, glavi hladnega materiala itd.
Hot nozzle leakage: The sealing surface of the hot nozzle is damaged, such as long-term contact with the mold, or scratched by foreign objects, which will reduce the sealing performance and cause leakage. The gap between the needle valve of the needle valve hot nozzle and the hot nozzle body is too large, or the seal of the needle valve is damaged, which will also cause leakage.
Abnormal hot nozzle temperature: Failure of the heating element of the hot nozzle, such as burning of the heating wire, will cause the temperature of the hot nozzle to be too low. The poor insulation effect of the hot nozzle, the heat dissipation to the surrounding environment, or the inaccurate temperature control of the hot nozzle by the thermostat may cause the temperature of the hot nozzle to be too high.
Če sistem Hot Runner ne uspe, bo neposredno vplival na kakovost in učinkovitost proizvodnje plastičnih izdelkov, zato sta potrebna pravočasna diagnoza in vzdrževanje .