Problem & Solution

Practical answers to common plastic material challenges

Browse Articles →

Q

POM Insert Cracking

A

Insert parts need triple protection of preheating plus wall thickness plus annealing; 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 subsequent simila...

Injection Molding POMinsertpreheatingannealing

Q

POM Pits and Pockmarks

A

Troubleshoot POM pockmarks along the three lines of feeding, mold temperature, and venting; the difference from sink marks lies in distribution pattern and causal path; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding POM;pockmark;pit;feeding;venting

Q

POM Discoloration Systematic Troubleshooting

A

POM discoloration requires systematically lowering temperature, pressure, and speed; single-point adjustments treat symptoms not the root cause—dead spots and small machines are the radical cure; after confirming effectiveness, solidify the parameters and practices into the work instruction to pr...

Injection Molding POM;discoloration;shear heat;dead spot;machine matching

Q

POM Mold Deposit

A

Mold deposit is POM's signature chronic disease; address temperature, rate, and venting simultaneously, combined with regular mold cleaning to maintain surface quality; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding POM;mold deposit;deposition;venting;Delrin

Q

POM Injection Speed Strategy

A

POM speed strategy is a balancing act of medium-fast; fine-tune in both directions according to wall thickness and defect type, avoiding the two extremes; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding POM;injection speed;medium-fast;ripple;jetting mark

Q

POM Injection Pressure Grading

A

POM pressure setting must be graded by structure; the wide range of 40-140MPa means one-size-fits-all parameters will inevitably sacrifice one aspect for another; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding POM;injection pressure;40-140MPa;grading;flash

Q

POM Pressure Sensitivity for Flow Adjustment

A

The correct means of adjusting POM flow is pressure, not temperature; the temperature-raising route is a typical wrong direction for POM; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence

Injection Molding POM;pressure sensitivity;Newtonian fluid;flowability;injection pressure

Q

POM Holding Pressure Feeding for Thick Walls

A

Shrinkage voids in thick-walled POM parts are solved by the holding pressure system; sufficient holding time and pressure plus gate channel management are the guarantee of internal quality; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent ...

Injection Molding POM;thick wall;shrinkage void;holding pressure;gate

Q

POM check ring wear

A

Metering stability is guaranteed by the check ring condition; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future

Injection Molding POMcheck ringmeteringSPC

Q

Jetting flow marks on POM product surface

A

Jetting marks can be effectively controlled with the speed profile alone; low initial speed lets the melt spread out before speeding up, balancing appearance and cycle time.；After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence

Injection Molding POM；jetting mark；injection speed；gate；multi-stage injection

Prev 1 ... 109 110 111 112 113 114 115 ... 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