Problem & Solution

Practical answers to common plastic material challenges

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Q

Chain Extender Dosage Problem

A

This problem is a typical manifestation of chain extender dosage problems 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 recomm...

Molds & Tooling chain extender dosage problem

Q

Catalyst Dosage Problem

A

This problem is a typical manifestation of catalyst dosage problems 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 ...

Processing Machinery catalyst dosage problemtemperature

Q

Moisture Content Exceeding Standard

A

This problem is a typical manifestation of moisture content exceeding standard 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 r...

Material Drying moisture content exceeding standard

Q

Improper Raw Material Temperature

A

This problem is a typical manifestation of improper raw material temperature 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 rec...

Processing Machinery improper raw material temperaturetemperature

Q

Embrittlement / Insufficient Strength

A

The essence of embrittlement is that the material toughness reserve drops to a level that cannot meet the use requirements. The key to control is the "three temperatures" — processing temperature (avoid excessive degradation), drying temperature (avoid too low leaving residual moisture and too hi...

Material Drying embrittlementthermal degradationdrying conditionsrecycled material ratioimpact strength

Q

Post-Curing Deformation

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 Analysis curing degreecatalyst dosagemold temperaturecuring timepost-curing

Q

Shrinkage Warpage

A

Warpage is macroscopic bending caused by inconsistent shrinkage of various parts of the part. The solution ideas are: achieve uniform cooling of all parts during the cooling stage (cooling water channel optimization), adopt symmetrical layout and isotropic design in structural design (wall thickn...

Molds & Tooling warpage deformationcooling uniformityresidual stressgate symmetryannealing

Q

Flow Mark / Whitening

A

This problem is a typical manifestation of flow mark/whitening 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 st...

Injection Molding flow markmelt temperaturemold temperatureinjection speedripple

Q

Rough Surface / Pitted Surface

A

This problem is a typical manifestation of rough surface/pitted surface 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 recommen...

Molds & Tooling demolding draft anglemold polishingholding pressurecooling timerelease agent

Q

Surface Orange Peel

A

This problem is a typical manifestation of surface orange peel 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 st...

Molds & Tooling demolding draft anglemold polishingholding pressurecooling timerelease agent

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