Problem & Solution

Practical answers to common plastic material challenges

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Q

PA6 Short Shot Venting Improvement

A

When short shot is accompanied by burnt, check venting first; venting improvement is more fundamental than pressure increase; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a trouble...

Molds & Tooling PA6 short shot vent groove burnt

Q

PA6 Flash from Parting Line Wear

A

Worsening flash mostly originates from mold condition deterioration, and mold repair is more fundamental than machine adjustment; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a tro...

Molds & Tooling PA6 flash parting line mold wear

Q

PA6 Internal Stress Cracking

A

Internal stress cracking is a joint problem of design and process, and rounding plus conditioning are low-cost countermeasures; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PA6 internal stress cracking screw boss

Q

PA6 Uneven Surface Gloss

A

For uneven gloss, first check mold temperature uniformity, then check mold surface condition and venting; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference f...

Molds & Tooling PA6 uneven gloss mold temperature polishing

Q

PA6 Snake-Shaped Jetting Marks

A

The root of jetting marks is that the melt has no support when entering the cavity, and changing the gate-to-wall relationship is most effective; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PA6 jetting mark snake-shaped mark gate design

Q

PA6 Gate Halo

A

Gate halo is a shear problem, with speed reduction, gate enlargement and temperature raising working together; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting refere...

Molds & Tooling PA6 gate halo shear multi-stage injection

Q

PA6 Flame-Retardant Grade Processing

A

Flame-retardant PA6 is doubly sensitive to shear and temperature; speed reduction, temperature control and corrosion-proof molds are three hard requirements for stable production; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PA6; flame retardant; screw speed; 0.2m/s; stainless steel mold

Q

PA6 Demolding Ejector Whitening and Scratch

A

The large mold-gripping force of PA6 originates from crystallization shrinkage; the three elements of draft angle, ejection layout and surface condition determine demolding quality; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PA6; demolding; ejector whitening; scratch; draft angle

Q

PA6 Short Shot Incomplete Filling

A

The main cause of PA6 short shot is fast solidification rather than viscosity; keeping temperature, enlarging gates and shortening flow length restore filling power in three ways; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Molds & Tooling PA6; short shot; fast solidification; gate; flow length ratio

Q

PA6 Glass Fiber Equipment Wear

A

Equipment protection for glass fiber PA6 requires upfront investment; wear-resistant configuration plus regular clearance measurement brings chronic wear into planned maintenance rather than after-the-fact firefighting; after confirming effectiveness, solidify the parameters and practices into th...

Molds & Tooling PA6; glass fiber; wear; bimetallic screw; H13

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