Problema e solução

Respostas práticas para os desafios comuns dos materiais plásticos

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Q

HDPE film strain hardening

A

Strain hardening is an extensional rheology problem; reducing the stretching load and adjusting the material rheological properties are two solution paths.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post HDPE; film; strain hardening; draw ratio; wrinkles; rheology

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 bubble breakage

A

Film breakage indicates that the stretching exceeds the limit the melt can withstand; reduce the load and stabilize the process first, then gradually optimize the output.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post HDPE; film; film breakage; blow-up ratio; melt strength; extrusion output

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 film uneven thickness

A

Thickness uniformity is the core indicator of film; the uniformity coordination of the die gap and air ring plus the online thickness measurement closed loop is the guarantee of stability.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent ...

Extrusion & Post HDPE; film; thickness; die gap; air ring; thickness measurement

Q

HDPE film gel particles and fisheyes

A

Gel particles are the most common appearance defect of film; the three lines of defense of filtration, mixing and cleanliness are all indispensable.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Extrusion & Post HDPE; film; gel particle; fisheye; screen; mixing

Q

HDPE blow-molded bottle mouth deformation

A

Bottle mouth quality determines sealing reliability; bottle mouth temperature control and timing are fine adjustment points of the blow '2079851475616104453.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling HDPE; '2079851475616104457; bottle mouth; deformation; sealing; trimming

Q

HDPE blow-molded product flash too thick

A

The amount of flash reflects the level of mold clamping and parison management; excessively thick flash is both waste and indicates equipment condition problems.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Blow Molding HDPE; '2079851475616104457; flash; mold clamping; parting line; trimming

Q

HDPE drum '2079851475616104457 wall thickness unevenness

A

Hollow drum wall thickness relies on parison program and temperature management; wall thickness program control is the core configuration of extrusion '2079851475616104457.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Blow Molding HDPE; '2079851475616104457; wall thickness; parison; program control; blow-up ratio

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