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Q

PEI Sharp Corner Stress Concentration

A

PEI's toughness and notch sensitivity coexist; rounded corner design is a prerequisite for exerting toughness; snap-fit structures are an advantageous application of PEI but require standardization.; after confirming effectiveness, fix the parameters and practices into the work instruction to pre...

Molding Process PEI;sharp corner;stress concentration;notch;rounded corner;toughness

Q

PEI Glass Fiber Reinforced Surface Roughness

A

The surface and weld line problems of PEI glass fiber parts are inherent to the material; fiber content is a design variable; verification should target weak areas.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Molding Process PEI;glass fiber;surface roughness;weld line;fiber content;mold temperature

Q

PEI Thin-Walled Part Filling

A

PEI ultra-thin walls are a material limit challenge; high-flow grades are a feasible path; the trade-off between material performance and processability requires systematic evaluation.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Analysis PEI;thin wall;filling;high flow;grade;limit

Q

PEI Melting Temperature Range Selection

A

PEI melt temperature settings must be grade-differentiated; the 382℃ discoloration line and ATX low-temperature zone are key knowledge points; manual confirmation is better than applying experience.; after confirming effectiveness, fix the parameters and practices into the work instruction to pre...

Molding Process PEI;melting temperature;357℃;ATX;grade;color

Q

PEI Drying Equipment Requirements

A

The dew point indicator of PEI drying equipment is a hard constraint; the closed design with aftercooler is the standard configuration; equipment performance is verified regularly.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Material Drying PEI;drying equipment;dew point;dehumidification;aftercooler;closed

Q

PEI Check Valve and Clearance

A

PEI check valve selection has clear type requirements; 80% flow clearance is the design standard; wear checks ensure metering stability.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PEI;check valve;sliding check ring;metering;clearance;wear

Q

PEI Barrel and Screw Design

A

PEI screws have detailed official design specifications; bimetallic barrels are the standard wear-resistant configuration; vented barrels are a clear taboo.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Processing Machinery PEI;screw;barrel;bimetallic;compression ratio;L/D ratio

Q

PEI Clamping Force Configuration

A

PEI clamping force of 4~6 tons per square inch is a precise standard; increasing for reinforced grades is a detail; reviewing the clamping margin prevents equipment damage.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Injection Molding PEI;clamping force;4 tons;projected area;glass fiber;mold swelling

Q

PEI Shot Size and Machine Matching

A

PEI's 30~80% shot size window and 60% high-temperature lower limit are clear supplier guidance; machine matching is a prerequisite for degradation prevention and control; residence time needs quantitative calculation.

Injection Molding PEI;shot size;machine matching;residence time;thermal degradation;60%

Q

PEI Screw Shear Overheating

A

The 20~60rpm and 1~5MPa back pressure in PEI screw management are quantitative guidance; low-shear configuration protects heat-sensitive materials; actual temperature measurement prevents gauge display distortion.

Processing Machinery PEI;screw speed;shear heat;back pressure;degradation;low compression ratio

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