Problem & Solution

Practical answers to common plastic material challenges

Browse Articles →

Q

PET hot runner temperature

A

The temperature control accuracy of the preform hot runner directly determines the gate quality; 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 for subseq...

Molds & Tooling PEThot runnergatetemperature control

Q

PET preform melt fracture

A

PET preform melt fracture is mostly seen in high-speed filling; coordinated adjustment of the three parameters of temperature, gate, and speed can eliminate the texture while ensuring the cycle.; after confirming effectiveness, solidify the parameters and practices into the work instruction to pr...

Molds & Tooling PET；preform；melt fracture；sharkskin；shear；gate

Q

PET preform hot runner crystallization blockage

A

Hot runner blockage is the cumulative result of long-term temperature control imbalance; standardizing shutdown and startup procedures and regular maintenance can significantly reduce the blockage frequency.; after confirming effectiveness, solidify the parameters and practices into the work inst...

Molds & Tooling PET；hot runner；blockage；crystallization；gate；maintenance

Q

PET oligomer precipitation contamination

A

Oligomer precipitation is a defect mainly of raw material factors; material selection and control of thermal history are the fundamental cure, while mold wiping can only treat the symptoms.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent...

Molds & Tooling PET；oligomer；precipitation；mold；contamination

Q

PET bottle crystallization spots from uneven cooling

A

Crystallization spots at fixed positions point to uneven mold cooling; thermal imaging is an efficient locating tool, and the patches usually disappear immediately after water channel modification.; after confirming effectiveness, solidify the parameters and practices into the work instruction to...

Molds & Tooling PET；bottle；crystallization spots；cooling；thermal imaging；water channels

Q

PET mold surface roughness causing white haze

A

The mold surface condition is directly replicated onto the bottle surface; optical-grade products require mirror polishing, and regular mold maintenance is the basic work for maintaining high transparency.; after confirming effectiveness, solidify the parameters and practices into the work instru...

Molds & Tooling PET；bottle；white haze；mold；polishing；surface

Q

Uneven PET hot runner temperature

A

Hot runner temperature uniformity determines multi-cavity consistency; tracking quality data by cavity can quickly locate the problem gate and is the standard management method for preform production.; after confirming effectiveness, solidify the parameters and practices into the work instruction...

Molds & Tooling PET；hot runner；uneven temperature；multi-cavity；consistency

Q

PET mold temperature out of control causing crystallization

A

Mold temperature is the key parameter for PET preform crystallization resistance; the maintenance of the cooling system and the stability of temperature control directly determine the batch consistency of preform transparency.; after confirming effectiveness, solidify the parameters and practices...

Molds & Tooling PET；preform；mold temperature；crystallization；cooling water channel；white haze

Q

PET melt temperature too high causing degradation

A

PET thermal degradation simultaneously produces the triple hazards of yellowing, AA increase, and IV decline; regularly measuring the actual melt temperature rather than only looking at the display is a basic requirement of temperature control management.; after confirming effectiveness, solidify...

Molds & Tooling PET；melt temperature；degradation；yellowing；shear heat

Q

Poor label adhesion on PET bottles

A

Label problems mostly originate from the bottle surface condition rather than the labeling machine; keeping the bottle surface clean and dry and eliminating surface defects are the prerequisites for improving the label adhesion pass rate.; after confirming effectiveness, solidify the parameters a...

Molds & Tooling PET；bottle；label；adhesion；surface；labeling

Prev 1 ... 69 70 71 72 73 74 75 ... 151 Next

Categories

All Topics 11636 Material Drying 1439 Injection Molding 1506 Molding Process 740 Molds & Tooling 1506 Processing Machinery 2025 Extrusion & Post 2239 Blow Molding 315 Thermoforming 141 Material Analysis 1343 Production & Quality 382