Problem & Solution

Q

Sink Marks at Thick-Wall Sections of High-Density Polyethylene Injection-Molded Products

A

Sink marks are a typical defect in the '2079851475616104452 of crystalline materials; the root cause is that local volume shrinkage is not effectively compensated, and it needs to be solved coordinately from three aspects: holding parameters, gate design, and cooling conditions.

Injection Molding sink markholding pressurecrystallization shrinkagegate designuniform wall thickness

Q

Weld Lines on High-Density Polyethylene Injection-Molded Products (Variant: Strengthened Measures)

A

Weld lines are a manifestation of poor melt convergence and fusion; the melt fusion quality is improved by increasing the melt temperature, injection speed, and mold temperature. Targeted preventive measures need to be taken in different production scenarios.

Injection Molding weld linemelt convergenceinjection speedmold temperaturegate design

Q

Sink Marks at Thick-Wall Sections of High-Density Polyethylene Injection-Molded Products (Variant: Strengthened Measures)

A

Sink marks are a typical defect in the '2079851475616104452 of crystalline materials; the root cause is that local volume shrinkage is not effectively compensated, and it needs to be solved coordinately from three aspects: holding parameters, gate design, and cooling conditions. Targeted preventi...

Injection Molding sink markholding pressurecrystallization shrinkagegate designuniform wall thickness

Q

Cracking of Biaxially Oriented Polypropylene Film Products Caused by Internal Stress

A

Internal stress cracking is a manifestation of processing stress exceeding the strength of the material.

Injection Molding internal stressstress crackinginjection speedmold temperatureuniform wall thickness

Q

Thread Stripping of PVDF Injection-Molded Parts

A

Thread design requires special consideration

Injection Molding PVDFthread

Q

PVDF injection cycle is too long, affecting efficiency

A

Cycle optimization is the key to increasing production and reducing cost

Injection Molding PVDFmolding cycle

Q

Flowability decline after glass fiber reinforcement

A

A trade-off between reinforcement effect and processability is needed

Injection Molding PVDFglass fiber

Q

Burnt yellow spots on injection molded products

A

Thermal decomposition produces HF and must be strictly avoided

Injection Molding PVDFburnt yellow

Q

Stress corrosion cracking of pump casings

A

Annealing is an effective means to eliminate stress

Injection Molding PVDFpump casing

Q

Abnormal injection melt viscosity

A

The processing temperature window is narrow and the operation requirements are high

Injection Molding PVDFviscosity

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