The main reasons for large fluctuations in melt pump outlet pressure include wear and tear of equipment, improper operation, material problems and abnormal system control. Specifically can be summarized as the following key factors:
First, equipment aging and component wear
Gear wear: gear or shaft sleeve clearance increases after long-term use, resulting in increased melt reflux and unstable outlet pressure.
Bearing and seal aging: sliding bearing or seal wear will reduce the lubrication effect, resulting in increased resistance to rotation or melt leakage, further affecting the pressure stability.
Second, operation and material problems
Insufficient inlet material or impurities Insufficient supply of melt at the pump head inlet can lead to incomplete filling of the gear, triggering sudden pressure changes and vibration.
Materials containing air bubbles, metallic foreign matter or carbonized coking material may clog the pump body or aggravate gear wear.
Improper temperature control: Melt viscosity varies significantly with temperature, and if the heating system is unstable, flow fluctuations will be directly reflected in the outlet pressure.
Third, the pipeline and system control defects
Pipeline design is not reasonable: flow blocking, dead ends or bending radius is too small will increase the fluid resistance, resulting in pressure fluctuations.
Control system failure: pressure sensor accuracy is insufficient or control algorithm is abnormal, unable to stabilize the output pressure adjustment.
Fourth. Other factors
Foreign matter stuck: metal parts or coking material stuck between gears may instantly block or even damage the pump body, triggering violent pressure fluctuations.
Suggested troubleshooting directions Prioritize checking the wear and bearing sealing status of the gear pump. Confirm the stability of the melt transfer piping layout and temperature control. Check whether there are foreign materials or air bubbles in the material, and optimize the filtration system if necessary.
Email: sale@heikomachinery.com
WhatsApp: +86 13803717447
pre:Melt Pump for Plastic Strap Production Line
next: None
TEL：+86 371 67991755
WhatsApp： +86 158 38331071
Adress: No.22 Dongqing Str., High & New Technology Development Zone, Zhengzhou, China.
