Problem & Solution

Practical answers to common plastic material challenges

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Q

HDPE film bubble flutter

A

Film bubble flutter is directly related to airflow impact; reducing the air velocity impact is the primary measure, and isolating ambient airflow is equally important.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Processing Machinery HDPE; film; bubble flutter; air ring; air velocity; frost line

Q

HDPE film frost line oscillation

A

The frost line is a barometer of the stability of the film blowing process; after the temperature, die head and air volume are stabilized in three places, the frost line will naturally be stable.; after confirming effectiveness, solidify the parameters and practices into the work instruction to p...

Processing Machinery HDPE; film; frost line; oscillation; temperature; die head

Q

HDPE film bubble instability (spiral swing)

A

Spiral swing is a comprehensive problem of melt strength and airflow stability; the formulation and air ring are adjusted in both directions, and the effect is judged by a stable frost line.; after confirming effectiveness, solidify the parameters and practices into the work instruction to preven...

Processing Machinery HDPE; film; film bubble; spiral; melt strength; air ring

Q

HDPE pipe die head clogging and uneven discharge

A

Die head clogging is a progressive problem; regular disassembly and cleaning and source cleanliness management are more economical than after-the-fact emergency repair, and it is recommended to establish a disassembly and cleaning cycle record.; after confirming effectiveness, fix the parameters ...

Processing Machinery HDPE; pipe; die head; clogging; buildup; cleaning

Q

HDPE pipe surface roughness

A

For surface roughness, first check the die head temperature and buildup, then check the plasticization state; die cleanliness and temperature are the first influencing factors of surface quality.; after confirming effectiveness, fix the parameters and practices into the work instruction to preven...

Processing Machinery HDPE; pipe; surface roughness; die head temperature; buildup; plasticization

Q

HDPE pipe roundness out of tolerance

A

Roundness problems mostly originate from uneven cooling and sizing precision; after verifying the three places of nozzle angle, water temperature, and sizing sleeve, the ovality can usually be restored to within the tolerance range.; after confirming effectiveness, fix the parameters and practice...

Processing Machinery HDPE; pipe; roundness; ellipse; nozzle; sizing sleeve

Q

HDPE film gel particles - black speck startup type

A

Startup black specks = a shutdown management problem.

Processing Machinery HDPE; film; black speck; startup; carbonization

Q

HDPE film gel particles - crosslinked type

A

Crosslinked gel particles = retention oxidation; manage shutdown and dead corners well.

Processing Machinery HDPE; film; gel; crosslinking; retention

Q

HDPE pipe black specks and impurities

A

Black specks = contamination or carbonization; cleanliness management is the defense line.

Processing Machinery HDPE; pipe; black speck; carbonization; contamination

Q

EVA foaming energy consumption optimization

A

Foaming energy consumption optimization relies on the coordination of process and equipment; temperature control precision saves energy and improves quality.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Processing Machinery EVA; foaming; energy consumption; vulcanization; insulation; temperature control

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