Problem & Solution

Practical answers to common plastic material challenges

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Q

Blistering/bubbles

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

Over-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

Q

Excessive runner residual material

A

This problem is a typical manifestation of excessive runner residual material in transfer molding; the core of the solution lies in the rational design of the runner and gate system, the effective transmission of transfer pressure, and the uniform control of mold temperature. It is recommended to...

Molds & Tooling runner designgate sizepressure losscold slug wellrunner temperature

Q

Runner blockage

A

This problem is a typical manifestation of runner blockage in transfer molding; the core of the solution lies in the rational design of the runner and gate system, the effective transmission of transfer pressure, and the uniform control of mold temperature. It is recommended to start troubleshoot...

Molds & Tooling curing degreecatalyst dosagemold temperaturecuring timepost-curing

Q

Gate mark too large

A

This problem is a typical manifestation of gate mark too large in transfer molding; the core of the solution lies in the rational design of the runner and gate system, the effective transmission of transfer pressure, and the uniform control of mold temperature. It is recommended to start troubles...

Molds & Tooling dimensional accuracyholding pressuremold temperatureshrinkage ratecheck ring

Q

Overflow flash

A

The root cause of flash is that the mold-opening force generated by the cavity internal pressure exceeds the closing force of the clamping system. The logic chain of the solution is: first reduce the cavity pressure peak through process adjustment, then check and repair the clamping system to ens...

Molds & Tooling flashclamping forceparting line gapcavity internal pressureburr

Q

Insufficient filling

A

This problem is a typical manifestation of insufficient filling in transfer molding; the core of the solution lies in the rational design of the runner and gate system, the effective transmission of transfer pressure, and the uniform control of mold temperature. It is recommended to start trouble...

Injection Molding insufficient fillingmaterial flowabilitymolding pressuremold temperaturefeeding amount

Q

Hydraulic oil temperature too high

A

This problem is a typical manifestation of hydraulic oil temperature too high 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 ...

Processing Machinery cooling water channelsmold temperaturecooling timewater channel blockageberyllium copper insert

Q

Inaccurate thermocouple temperature measurement

A

This problem is a typical manifestation of inaccurate thermocouple temperature measurement 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 recommend...

Molds & Tooling inaccurate thermocouple temperature measurement

Q

Mold heating tube failure

A

This problem is a typical manifestation of mold heating tube failure 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 coordinat...

Molds & Tooling mold heating tube failuremold

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