Problem & Solution

Q

Sticky product surface

A

This problem is a typical manifestation of sticky product surface in compression molding; the core of the solution lies in proper preheating of the material and assurance of flowability, as well as precise matching of mold temperature and molding pressure. It is recommended to adjust coordinately...

Material Drying draft anglemold polishingholding pressurecooling timerelease agent

Q

Prepreg storage deterioration

A

This problem is a typical manifestation of prepreg storage deterioration in compression molding; the core of the solution lies in proper preheating of the material and assurance of flowability, as well as precise matching of mold temperature and molding pressure. It is recommended to adjust coord...

Material Drying curing degreecatalyst dosagemold temperaturecuring timepost-curing

Q

Poor powder flowability

A

This problem is a typical manifestation of poor powder flowability in compression molding; the core of the solution lies in proper preheating of the material and assurance of flowability, as well as precise matching of mold temperature and molding pressure. It is recommended to adjust coordinatel...

Material Drying poor powder flowabilitytemperaturepressuremold

Q

Bubbles around inserts

A

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

Material Drying bubblesraw '2079851475616104451back pressure controlvacuum shrinkage cavitymold venting

Q

Insufficient strength

A

This problem is a typical manifestation of insufficient strength in compression molding; the core of the solution lies in proper preheating of the material and assurance of flowability, as well as precise matching of mold temperature and molding pressure. It is recommended to adjust coordinately ...

Material Drying curing degreecatalyst dosagemold temperaturecuring timepost-curing

Q

Pitting/pinholes

A

This problem is a typical manifestation of pitting/pinholes in compression molding; the core of the solution lies in proper preheating of the material and assurance of flowability, as well as precise matching of mold temperature and molding pressure. It is recommended to adjust coordinately from ...

Material Drying draft anglemold polishingholding pressurecooling timerelease agent

Q

Surface dullness/darkening

A

This problem is a typical manifestation of surface dullness/darkening in compression molding; the core of the solution lies in proper preheating of the material and assurance of flowability, as well as precise matching of mold temperature and molding pressure. It is recommended to adjust coordina...

Material Drying surface glossmold polishingmold temperatureholding pressurerelease agent

Q

Bubbles/blistering

A

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

Material Drying bubblesraw '2079851475616104451back pressure controlvacuum shrinkage cavitymold venting

Q

Excessive Ambient Humidity

A

This problem is a typical manifestation of excessive ambient humidity 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 recommende...

Material Drying excessive ambient humiditymold

Q

Surface Foaming

A

This problem is a typical manifestation of surface foaming 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 to start ...

Material Drying vent groovegas back pressureoverflow wellvacuum ventingvent depth

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