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Uneven Wall Thickness of High-Density Polyethylene Extruded Pipes

Uneven wall thickness is caused by uneven die gap or uneven temperature, and needs to be solved from mold precision and temperature uniformity.

Extrusion & Post uneven wall thicknessdie concentricityuniform temperaturestable haul-offsizing sleeve

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Insufficient Long-Term Hydrostatic Strength of High-Density Polyethylene PPR Pipes

Insufficient long-term hydrostatic strength is caused by material selection and processing quality, and needs comprehensive control from raw materials, processes, and welding.

Extrusion & Post hydrostatic strengthPPRmolecular weightpipe wall thicknesscrystallinity

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Sharkskin Texture Appearing on the Surface of High-Density Polyethylene Extruded Products

Sharkskin texture is the result of stick-slip flow of the melt at the die exit, and is improved by increasing the die temperature and reducing the extrusion speed.

Extrusion & Post sharkskinmelt fracturedie temperatureextrusion speeddie polishing

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Bamboo Stripes/Melt Fracture Appearing on the Surface of High-Density 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, increase the temperature, and optimize the die design.

Extrusion & Post melt fracturebamboo stripescritical shear ratedie temperatureextrusion speed

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Undersized Dimension Below the Lower Limit of High-Density Polyethylene Injection-Molded Products

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

Extrusion & Post undersized dimensionexcessive shrinkageinsufficient holdingpost-shrinkagegate freezing

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Oversized Dimension Exceeding the Upper Limit of High-Density Polyethylene Injection-Molded Products

Oversized dimensions are mainly caused by insufficient shrinkage; the actual shrinkage is controlled within the tolerance range by adjusting the holding and temperature parameters.

Extrusion & Post oversized dimensionholding pressureshrinkagemold temperaturedimension control

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Flash/Burrs on High-Density Polyethylene Injection-Molded Products

Flash is a manifestation of a mismatch between the mold clamping force and the injection pressure, and needs to be controlled from three aspects: clamping force, injection pressure, and mold precision.

Extrusion & Post flashclamping forceinjection pressureparting linemold gap

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Rubber Migration/Bleeding of Cast Polypropylene Film HIPS Products

HIPS rubber bleeding is caused by compatibility and temperature.

Extrusion & Post rubber migrationbleedingHIPScompatibilityprocessing temperature

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Elongation at Break of Cast Polypropylene Film Not Up to Standard

Film performance needs to be systematically optimized from three aspects: raw materials, process, and cooling.

Extrusion & Post elongation at breakfilmcast polypropylene filmextrusion temperaturestretching process

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efficiency decline Occurring in the winding Stage of Cast polypropylene film

The process parameters of each stage of film production need to be precisely controlled; equipment condition and raw material quality are the foundation.

Extrusion & Post windingefficiency declinecast polypropylene filmprocess parametersequipment maintenance

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Kategoriler

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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