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Yaygın plastik malzeme zorluklarına pratik yanıtlar

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Bamboo pattern/melt fracture appears on the surface of general-purpose polyethylene extruded products

Melt fracture is flow instability caused by the extrusion speed exceeding the critical value, and it is necessary to reduce the speed, raise the temperature, and optimize the die design.

Extrusion & Post melt fracture bamboo pattern critical shear rate die temperature extrusion speed

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Severe screw wear of general-purpose polyethylene '2079851475616104452 machine

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

Injection Molding screw wear wear-resistant material screw speed filler wear screw clearance

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Unstable cycle of general-purpose polyethylene '2079851475616104452

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

Injection Molding unstable cycle cooling time plasticizing time mold temperature equipment maintenance

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Large injection pressure fluctuation in general-purpose polyethylene '2079851475616104452

Injection pressure fluctuation is caused by unstable hydraulic system or inconsistent plasticization, and the hydraulic, screw, and temperature control systems need to be systematically investigated.

Injection Molding pressure fluctuation hydraulic system non-return ring temperature stability consistent plasticization

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Dimensions of general-purpose polyethylene injection molded products too small, below the lower limit

Undersized dimensions are caused by excessive shrinkage, and the shrinkage rate needs to be controlled by strengthening the holding pressure, lowering the temperature, and extending the cooling time.

Extrusion & Post undersized dimension excessive shrinkage insufficient holding pressure post-shrinkage gate freezing

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Large performance differences between different batches of general-purpose polyethylene raw materials

Batch differences are caused by fluctuations in raw material production, and a sound incoming inspection and batch management system needs to be established.

Material Analysis batch difference melt flow rate incoming inspection batch management process adjustment

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Unstable screw back in general-purpose polyethylene '2079851475616104452

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

Injection Molding screw back back pressure plasticization screw wear uniform temperature

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Low tensile strength of general-purpose polyethylene injection molded products

Low tensile strength is mainly caused by material degradation or internal defects, and it is necessary to control the processing temperature, shear, and regrind ratio.

Injection Molding tensile strength thermal degradation molecular weight screw speed regrind ratio

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Burnt marks/burnt spots appear on general-purpose polyethylene injection molded products

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

Injection Molding burnt mark burnt spot mold venting injection speed trapped air compression

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Coaxiality out of tolerance of general-purpose polyethylene injection molded products

Coaxiality out of tolerance is caused by core shift or asymmetric shrinkage, and needs to be solved from mold accuracy, gate symmetry, and temperature uniformity.

Injection Molding coaxiality core shift uneven wall thickness symmetrical gate uniform temperature

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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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