Problem & Solution

Practical answers to common plastic material challenges

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Q

Part Tearing During Demolding

A

This problem is a typical manifestation of part tearing during demolding 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 recomme...

Molds & Tooling demolding draft anglemold polishingholding pressurecooling timerelease agent

Q

Uneven Part Density

A

This problem is a typical manifestation of uneven part density 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 bubbleraw '2079851475616104451back pressure controlvacuum shrinkage cavitymold venting

Q

Reaction Exotherm Out of Control

A

This problem is a typical manifestation of reaction exotherm out of control 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 reco...

Molds & Tooling reaction exotherm out of controltemperaturemold

Q

Improper Mold Temperature Control

A

This problem is a typical manifestation of improper mold temperature control 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...

Molds & Tooling mold temperatureheating systemthermocoupletemperature uniformityheating tube

Q

Insufficient Release Agent

A

This problem is a typical manifestation of insufficient release agent 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...

Molds & Tooling demolding draft anglemold polishingholding pressurecooling timerelease agent

Q

Poor Venting

A

This problem is a typical manifestation of poor venting 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 tro...

Molds & Tooling vent groovegas back pressureoverflow wellvacuum ventingvent depth

Q

Mold Leakage

A

This problem is a typical manifestation of mold leakage 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 tro...

Molds & Tooling mold leakagemold

Q

Inaccurate Metering Pump Metering

A

This problem is a typical manifestation of inaccurate metering pump metering 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...

Molds & Tooling bubbleraw '2079851475616104451back pressure controlvacuum shrinkage cavitymold venting

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

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

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