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Q

Air Entrapment / Bubble

A

The three major causes of bubbles (moisture, air entrainment, vacuum shrinkage cavities) need to be treated differently: moisture type — full drying; air entrainment type — optimize plasticizing and injection parameters; vacuum shrinkage cavity type — strengthen holding pressure feeding. Accurate...

Material Drying bubbleraw '2079851475616104451back pressure controlvacuum shrinkage cavitymold venting

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Q

Too Slow Curing

A

The core of curing abnormality is that the rate and degree of the crosslinking reaction deviate from the optimal window. The adjustment idea is the "three-element method": formulation (precise metering of catalyst/curing agent), temperature (precise control of mold and material temperature), time...

Molds & Tooling curing degreecatalyst dosagemold temperaturecuring timepost-curing

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Q

Too Fast Curing

A

The core of curing abnormality is that the rate and degree of the crosslinking reaction deviate from the optimal window. The adjustment idea is the "three-element method": formulation (precise metering of catalyst/curing agent), temperature (precise control of mold and material temperature), time...

Molds & Tooling curing degreecatalyst dosagemold temperaturecuring timepost-curing

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Q

Incomplete Curing

A

The core of curing abnormality is that the rate and degree of the crosslinking reaction deviate from the optimal window. The adjustment idea is the "three-element method": formulation (precise metering of catalyst/curing agent), temperature (precise control of mold and material temperature), time...

Material Drying curing degreecatalyst dosagemold temperaturecuring timepost-curing

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Q

Component Ratio Imbalance

A

This problem is a typical manifestation of component ratio imbalance in the RIM process; the core of the solution lies in ensuring the precise ratio and full mixing of the two components, while controlling the reaction temperature and curing conditions within the optimal window. It is recommended...

Molds & Tooling component ratiometering pumpviscosity controlisocyanate indexone-way valve

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Q

Uneven Mixing

A

RIM mixing quality is the first element determining part consistency. The core control points are: the impingement mixing Reynolds number of the mixing head (to ensure turbulent mixing), the viscosity matching of the two components (to reduce viscosity difference), the accuracy of the metering pu...

Molds & Tooling mixing uniformitymixing headimpingement mixingcomponent viscositymetering accuracy

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Q

Material Batch Difference

A

This problem is a typical manifestation of material batch difference in '2079851475616104452; the core of the solution lies in eliminating the root cause of the defect through systematic optimization of process parameters (temperature, pressure, speed) and rationality checks of mold design. It is...

Molds & Tooling material batch differencematerial

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Q

Improper Mixing Ratio

A

This problem is a typical manifestation of improper mixing ratio in '2079851475616104452; the core of the solution lies in eliminating the root cause of the defect through systematic optimization of process parameters (temperature, pressure, speed) and rationality checks of mold design. It is rec...

Molds & Tooling improper mixing ratio

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Q

Impurity / Foreign Matter in Material

A

This problem is a typical manifestation of impurity/foreign matter in material in '2079851475616104452; the core of the solution lies in eliminating the root cause of the defect through systematic optimization of process parameters (temperature, pressure, speed) and rationality checks of mold des...

Molds & Tooling charging amountmaterial fluidityweighing accuracyhopper bridgingmaterial distribution

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Q

Degradation of Moisture-Sensitive Materials

A

This problem is a typical manifestation of moisture-sensitive material degradation in '2079851475616104452; the core of the solution lies in eliminating the root cause of the defect through systematic optimization of process parameters (temperature, pressure, speed) and rationality checks of mold...

Material Drying thermal degradationprocessing temperatureresidence timeheat stabilizeryellowing

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