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Q

PVC Injection Product Uneven Discoloration

A

PVC local discoloration = 'local overheating': hot runner temperature difference and retention are the two sources; PVC is heat-sensitive, any local overheating shows color — temperature control uniformity is fundamental.

Injection Molding PVC; '2079851475616104452; discoloration; hot runner; shear heat

Q

PVC Foam Product Poor Surface Skinning

A

PVC skinning = 'temperature and pressure synchronization': rhythm matching of skinning and foaming is the core; mold temperature and pressure stability determine surface skinning quality; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurre...

Molds & Tooling PVC; foam board; skinning; mold temperature; pressure

Q

PVC Injection Product Peeling

A

PVC peeling = 'contamination and plasticization': interlayer non-fusion caused by poor PVC plasticization is its characteristic; first check contamination then grasp plasticization, release agent dosage must also be controlled.

Injection Molding PVC; '2079851475616104452; peeling; contamination; plasticization

Q

PVC Profile Uneven Cooling Deformation

A

PVC profile bending = 'cooling and haul-off straightness': uniform cooling and straight haul-off are the two elements; calibration die condition directly determines profile straightness; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.

Extrusion & Post PVC; profile; bending; calibration die; haul-off

Q

PVC Extrusion Output Decline

A

PVC output decline = 'wear + screen blockage': PVC fillers are highly abrasive, screw life is short; wear-resistant materials and regular clearance measurement are the hardware basis for maintaining output; after confirming effectiveness, fix the parameters and practices into the work instruction...

Extrusion & Post PVC; extrusion; output; screw wear; screen pack

Q

PVC Injection Silver Streaks

A

PVC silver streaks = 'moisture + decomposition gas': besides moisture, PVC silver streaks also have the factor of shear decomposition gas; water control and shear heat control must go together; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent r...

Material Drying PVC; '2079851475616104452; silver streak; moisture; shear heat

Q

PVC Pipe Sizing Adhesion

A

PVC sizing adhesion = 'exudation management': lubrication balance and melt temperature are key; exudate accumulation is gradual, regular cleaning and formula optimization must go together; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurr...

Processing Machinery PVC; pipe; sizing sleeve; plate-out; pulled damage

Q

PVC Injection Product Dull Surface

A

PVC gloss = 'plasticization + mold temperature + anti-degradation': degradation dragging gloss dark is PVC's characteristic; plasticization and mold temperature manage replication, anti-degradation manages base color; after confirming effectiveness, fix the parameters and practices into the work ...

Injection Molding PVC; '2079851475616104452; gloss; plasticization; mold temperature

Q

PVC Profile Co-extrusion Layer Peeling

A

PVC co-extrusion peeling = 'interface temperature and matching': the two layers must be fused in place with good synchronization; co-extrusion interface bonding is the core, formula and temperature must match.

Extrusion & Post PVC; profile; co-extrusion; peeling; interface

Q

PVC Injection Hot Runner Problems

A

PVC + hot runner = 'high-precision temperature control challenge': dead corners and temperature control deviation are the two minefields; PVC with hot runner has extremely high system precision requirements, needs dedicated design and maintenance.

Injection Molding PVC; hot runner; black speck; temperature control; retention

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