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Low hardness of low density polyethylene injection products

Low hardness is mainly caused by insufficient crystallinity or material degradation; it needs to be improved by increasing mold temperature and holding pressure.

Injection Molding low hardnesscrystallinitymold temperatureholding pressurenucleating agent

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Nozzle drooling in low density polyethylene '2079851475616104452

Drooling is caused by high nozzle temperature and residual pressure; it is solved by lowering temperature, adjusting back pressure, and increasing suck-back.

Injection Molding droolingnozzle temperatureback pressuresuck-back amountneedle valve nozzle

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Fast gate freezing of low density polyethylene injection mold

Gate freezing too fast is caused by small gate size or low temperature; freezing time needs to be extended by enlarging the gate and increasing temperature.

Injection Molding gate freezinggate sizemold temperaturemelt temperatureholding pressure

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Unstable mold temperature control in low density polyethylene '2079851475616104452

Unstable mold temperature is caused by improper cooling system design or maintenance; it needs to be solved from the mold temperature controller, water channel design, and maintenance.

Injection Molding unstable mold temperaturemold temperature controllercooling water channelscaletemperature uniformity

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Severe screw wear of low density polyethylene injection machine

Screw wear is caused by material, fillers, and operating parameters; wear-resistant materials need to be selected and operating parameters reasonably controlled.

Injection Molding screw wearwear-resistant materialscrew rotation speedfiller wearscrew clearance

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Unstable cycle in low density polyethylene '2079851475616104452

Cycle instability is caused by the accumulation of time fluctuations in each process step; cooling, demolding, plasticizing, and equipment systems need to be investigated one by one.

Injection Molding cycle instabilitycooling timeplasticizing timemold temperatureequipment maintenance

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Large injection pressure fluctuation in low density polyethylene '2079851475616104452

Injection pressure fluctuation is caused by hydraulic system instability or plasticizing inconsistency; the hydraulic, screw, and temperature control systems need to be systematically investigated.

Injection Molding pressure fluctuationhydraulic systemnon-return ringtemperature stabilityplasticizing consistency

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Unstable screw retraction in low density polyethylene '2079851475616104452

Unstable screw retraction is caused by large plasticizing resistance or equipment wear; back pressure, temperature, and screw condition need to be optimized.

Injection Molding screw retractionback pressureplasticizingscrew weartemperature uniformity

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Low tensile strength of low density polyethylene injection products

Low tensile strength is mainly caused by material degradation or internal defects; processing temperature, shear, and regrind ratio need to be controlled.

Injection Molding tensile strengththermal degradationmolecular weightscrew rotation speedregrind ratio

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Burn marks/burnt spots on low density polyethylene injection products

Burn marks are the result of trapped air in the cavity being compressed and heated, causing material carbonization; the core solution is to improve venting and reduce injection speed.

Injection Molding burn marksburnt spotsmold ventinginjection speedtrapped air compression

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Tüm Konular 11636 Material Drying 1439 Injection Molding 1506 Molding Process 740 Molds & Tooling 1506 Processing Machinery 2025 Extrusion & Post 2239 Blow Molding 315 Thermoforming 141 Material Analysis 1343 Production & Quality 382

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