{"id":2339,"date":"2020-02-05T14:21:00","date_gmt":"2020-02-05T14:21:00","guid":{"rendered":"https:\/\/polymat.com.mx\/polymat\/?page_id=2339"},"modified":"2020-02-24T15:22:02","modified_gmt":"2020-02-24T15:22:02","slug":"frequent-questions","status":"publish","type":"page","link":"https:\/\/polymat.com.mx\/polymat\/index.php\/en\/frequent-questions\/","title":{"rendered":"Frequent Questions"},"content":{"rendered":"

[vc_row][vc_column][vc_column_text]<\/p>\n

DEFECTS THAT ARE PRESENTED IN THE PROCESS OF TRANSFORMATION<\/span><\/strong><\/p>\n

(Click on each option to see more information)<\/p>\n

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<\/div>[\/vc_column][\/vc_row][vc_row][vc_column width=\u00bb1\/2″][vc_toggle title=\u00bbExtracting the mold piece difficulty\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n
POSSIBLE CAUSE<\/strong><\/span><\/td>\nSUGGESTED SOLUTION<\/span><\/strong><\/td>\n<\/tr>\n
– Pieces too cold.<\/span><\/td>\nVerify mold temperature.<\/td>\n<\/tr>\n
– Excessive packing of the material.<\/span><\/td>\nReduce packing pressure.<\/td>\n<\/tr>\n
\n
– Defects in the mold (finish, design).<\/span><\/div>\n<\/td>\n
Possible surface coating to the mold.<\/td>\n<\/tr>\n
Rectify the surface of the mold.<\/td>\n<\/tr>\n
Change mold ultimately.<\/td>\n<\/tr>\n
– Inappropriate material.<\/span><\/td>\nSwitch to one with less fluency.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbPoor surface finish in the piece\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n\n\n
POSSIBLE CAUSE<\/strong><\/span><\/td>\nSUGGESTED SOLUTION<\/span><\/strong><\/td>\n<\/tr>\n
\n
– Resin enters the mold cold.<\/span><\/div>\n<\/td>\n
Verify temperature profile for the material.<\/td>\n<\/tr>\n
Check nozzle temperature.<\/td>\n<\/tr>\n
Check mold temperature.<\/td>\n<\/tr>\n
– Filling the mold very slowly.<\/td>\nIncrease temperature profile for the material.<\/td>\n<\/tr>\n
Increase nozzle temperature.<\/td>\n<\/tr>\n
Increase mold temperature.<\/td>\n<\/tr>\n
Increase injection pressure.<\/td>\n<\/tr>\n
\n
– Defects in the mold (finish, design).<\/span><\/div>\n<\/td>\n
Possible surface coating to the mold.<\/td>\n<\/tr>\n
Rectify the surface of the mold.<\/td>\n<\/tr>\n
Verify that the configuration of the corridors and entrances is ideal for the piece.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbPoor color in the piece\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n
POSSIBLE CUASE<\/strong><\/span><\/td>\nSUGGESTED SOLUTION<\/strong><\/span><\/td>\n<\/tr>\n
– Inappropriate coloring.<\/span><\/td>\nChange the type of dye or concentration.<\/td>\n<\/tr>\n
– Bad distribution in the premix.<\/span><\/td>\nIncrease back pressure in material recharge.<\/td>\n<\/tr>\n
\n
– Improper screw.<\/span><\/div>\n<\/td>\n
See the possibility of changing the screw configuration.<\/td>\n<\/tr>\n
Screw replacement.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbInternal bubbles in the piece\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n
\n
POSSIBLE CUASE<\/span><\/strong><\/div>\n<\/td>\n
SGGESTED SOLUTION<\/span><\/strong><\/td>\n<\/tr>\n
-Insufficient plastic in the mold to prevent a contraction produced by edges, nerves.<\/td>\nIncrease food.<\/td>\n<\/tr>\n
Increase the size of the entry.<\/td>\n<\/tr>\n
Increase injection pressure.<\/td>\n<\/tr>\n
-Moisture in the material.<\/td>\nProper drying of the material before processing.<\/td>\n<\/tr>\n
Check the peripheral drying and transport equipment to the feed hopper.<\/td>\n<\/tr>\n
-Uneven temperature in the mold.<\/td>\nCheck the feed channels for cooling the mold, which are not obstructed.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbRupture or piece with cracks\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n
POSSIBLE CAUSE<\/span><\/strong><\/td>\nSUGGESTED SOLUTION<\/span><\/strong><\/td>\n<\/tr>\n
-Cold mold<\/td>\nRaise the mold temperature.<\/td>\n<\/tr>\n
\n
– Improper design or mold prints.<\/div>\n<\/td>\n
Possible surface coating to the mold.<\/td>\n<\/tr>\n
Rectify the surface of the mold.<\/td>\n<\/tr>\n
Change mold ultimately.<\/td>\n<\/tr>\n
– Excessive packing of the material.<\/td>\nCheck packing pressure.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbBurr or flash\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n
POSSIBLE CAUSE<\/span><\/strong><\/td>\nSUGGESTED SOLUTION<\/span><\/strong><\/td>\n<\/tr>\n
-Excessive feeding.<\/td>\nReduce feeding.<\/td>\n<\/tr>\n
– Injection pressure too high compared to clamping force.<\/td>\nDecrease pressure.<\/td>\n<\/tr>\n
\n
– Overheated material.<\/div>\n<\/td>\n
Check the temperature profile of the material.<\/td>\n<\/tr>\n
Decrease mold temperature.<\/td>\n<\/tr>\n
– Mold out of adjustment.<\/td>\nVerify mold calibration for closing.<\/td>\n<\/tr>\n
\n
– Low closing force.<\/div>\n<\/td>\n
Increase closing pressure.<\/td>\n<\/tr>\n
Check if the machine is adequate for the pressure required by the part to be injected.<\/td>\n<\/tr>\n
– Very large vents and clearings in the mold.<\/td>\nReview designs.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbFlow lines\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\n
POSSIBLE CAUSE<\/span><\/strong><\/div>\n<\/td>\n
SUGGESTED SOLUTION<\/span><\/strong><\/td>\n<\/tr>\n
– Very cold mold.<\/td>\nRaise the mold temperature.<\/td>\n<\/tr>\n
Check the feed channels for cooling the mold, which are not obstrected.<\/td>\n<\/tr>\n
– Low injection pressure.<\/td>\nIncrease injection pressure.<\/td>\n<\/tr>\n
– Clogged channels.<\/td>\nChannel Cleaning<\/td>\n<\/tr>\n
Check if the design is appropriate.<\/td>\n<\/tr>\n
\n
– Inappropriate entrance or nozzle very narrow.<\/div>\n<\/td>\n
Rectify the nozzle.<\/td>\n<\/tr>\n
Change the nozzle.<\/td>\n<\/tr>\n
Decrease injection speed.<\/td>\n<\/tr>\n
– Bad dispersion of the color concentrate or pigment.<\/td>\nLoad the material more slowly.<\/td>\n<\/tr>\n
– Insufficient dosage.<\/td>\nIncrease the dosage.<\/td>\n<\/tr>\n
– Temperature too low.<\/td>\nIncrease the temperature of the barrel.<\/td>\n<\/tr>\n
Modify the temperature profile.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbIncomplete parts\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\n
POSSIBLE CAUSE<\/strong><\/span><\/div>\n<\/td>\n
SUGGESTED SOLUTION<\/strong><\/span><\/td>\n<\/tr>\n
– Insufficient material load in the cavity.<\/td>\nInject more material.<\/td>\n<\/tr>\n
Increase injection pressure.<\/td>\n<\/tr>\n
– Lack of material in the hopper.<\/td>\nInject more material.<\/td>\n<\/tr>\n
– Non-uniform temperatures in the mold.<\/td>\nCheck and clean mold cooling system.<\/td>\n<\/tr>\n
– Temperature too low.<\/td>\nIncrease the barrel temperature.<\/td>\n<\/tr>\n
– Poor mold design.<\/td>\nCorrection of tickets and corridors.<\/td>\n<\/tr>\n
Change of mold.<\/td>\n<\/tr>\n
– Vent system in the clogged mold.<\/td>\nCleaning of the venting systems.<\/td>\n<\/tr>\n
– Cannon too small.<\/td>\nChange the mold to a machine of greater capacity.<\/td>\n<\/tr>\n
– Obstruction of the hopper or nozzle.<\/td>\nClean and release of glued material.<\/td>\n<\/tr>\n
– Valve plugged.<\/td>\n<\/tr>\n
– Holding time too short.<\/td>\nIncrease injection speed.<\/td>\n<\/tr>\n
– Injection speed too low.<\/td>\n<\/tr>\n
– Channels too small.<\/td>\nModify the size of the mold channels.<\/td>\n<\/tr>\n
– Insufficient breathing.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbWelding lines\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n\n
\n
POSSIBLE CAUSE<\/strong><\/span><\/div>\n<\/td>\n
SUGGESTED SOLUTION<\/span><\/strong><\/td>\n<\/tr>\n
\n
– Plastic too cold.<\/div>\n<\/td>\n
Increase mold and barrel temperature.<\/td>\n<\/tr>\n
Increase injection pressure.<\/td>\n<\/tr>\n
\n
– Variation in the thickness of the pieces.<\/div>\n<\/td>\n
Redesign of the piece.<\/td>\n<\/tr>\n
Redesign of the material input to the piece.<\/td>\n<\/tr>\n
– Mold too cold.<\/td>\nIncrease mold temperature.<\/td>\n<\/tr>\n
– Insufficient pressure<\/td>\nIncrease injection pressure.<\/td>\n<\/tr>\n
– Low injection speed.<\/td>\nIncrease injection speed.<\/td>\n<\/tr>\n
– Inadequate venting systems.<\/td>\nCleaning of the venting systems.<\/td>\n<\/tr>\n
Redesign of the venting systems.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbWarping, buckling, crooked\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n
POSSIBLE CAUSE<\/strong><\/span><\/td>\nSUGGESTED SOLUTION<\/span><\/strong><\/td>\n<\/tr>\n
– Inappropriate material.<\/td>\nChange to a more fluid material.<\/td>\n<\/tr>\n
\n
– Poor mold design.<\/div>\n<\/td>\n
Change the place of entry.<\/td>\n<\/tr>\n
Improve the polishing of the mold.<\/td>\n<\/tr>\n
– Inadequate processing temperatures.<\/td>\nIncrease resin temperature.<\/td>\n<\/tr>\n
Increase the cooling time.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbThere is no load of material\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n
POSSIBLE CAUSE<\/span><\/strong><\/td>\nSUGGESTED SOLUTION<\/span><\/strong><\/td>\n<\/tr>\n
– Clogged hopper throat.<\/td>\nClean the hopper throat.<\/td>\n<\/tr>\n
– Inadequate temperature profile.<\/td>\nVerify that the temperature profile is adequate.<\/td>\n<\/tr>\n
– Worn screw.<\/td>\nScrew change.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbPlug and vacuum\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
POSIBLE CAUSA<\/span><\/strong><\/td>\nSOLUCI\u00d3N SUGERIDA<\/span><\/strong><\/td>\n<\/tr>\n
Contractions and slits by rapid injection.<\/td>\nAttention in mold design.<\/td>\n<\/tr>\n
Reduce melting temperature.<\/td>\n<\/tr>\n
Reduce cavity wall temperature.<\/td>\n<\/tr>\n
Increase screw forward speed.<\/td>\n<\/tr>\n
Increase containment pressure.<\/td>\n<\/tr>\n
Increase containment pressure time.<\/td>\n<\/tr>\n
Increase injection volume.<\/td>\n<\/tr>\n
Avoid the use of mold release agents whenever possible.<\/td>\n<\/tr>\n
Injection pressure too low.<\/td>\nIncrease the pressure.<\/td>\n<\/tr>\n
Pressure holding time too short.<\/td>\nIncrease pressure holding time.<\/td>\n<\/tr>\n
Low injection speed.<\/td>\nIncrease injection speed.<\/td>\n<\/tr>\n
Overheated material.<\/td>\nDecrease the barrel temperature.<\/td>\n<\/tr>\n
Humidity<\/td>\nOpen the vent or pre-pack the material.<\/td>\n<\/tr>\n
Non-uniform mold cooling.<\/td>\nModify mold cooling channels or water flow.<\/td>\n<\/tr>\n
Channels or gate very small.<\/td>\nModify the mold.<\/td>\n<\/tr>\n
Bad design of the piece.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbSunken and hollow marks\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n
POSSIBLE CAUSE<\/strong><\/span><\/td>\nSUGGESTED SOLUTION<\/span><\/strong><\/td>\n<\/tr>\n
Thick sections of peace.<\/td>\nMake the design with thinner sections.<\/td>\n<\/tr>\n
But the contraction of the internal material causes the scab to depress below the nominal surface.<\/td>\nDecrease the compaction pressure.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbMatt zone near the casting point\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n
POSSIBLE CAUSE<\/strong><\/span><\/td>\nSUGGESTED SOLUTION<\/span><\/strong><\/td>\n<\/tr>\n
High efforts<\/td>\nIncrease static friction, greater by force. Shear.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbStretch marks (burned stretch marks, oxidation stretch marks, streaks in the material)\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n
POSSIBLE CAUSE<\/strong><\/span><\/td>\nSUGGESTED SOLUTION<\/span><\/strong><\/td>\n<\/tr>\n
Burns, moisture and air.<\/td>\nLower temperature too high and \/ or residence times too long.<\/td>\n<\/tr>\n
Moisture<\/td>\nTarnished mold, rolled, lower long areas.<\/td>\n<\/tr>\n
Air, bubbles<\/td>\nIncrease injection speed, dry material before process, raise temp. Mold.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbBursts\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n
POSSIBLE CAUSE<\/strong><\/span><\/td>\nSUGGESTED SOLUTION<\/strong><\/span><\/td>\n<\/tr>\n
Appears behind narrow sections.<\/td>\nLower the dough temperature (it is near the upper limit of the process).<\/td>\n<\/tr>\n
(shear points) or living edges of the mold.<\/td>\nDecrease the spindle feed rate a reduction is obtained.<\/td>\n<\/tr>\n
Cycle interruption or low volume<\/td>\nDesign supply.<\/td>\n<\/tr>\n
Recicle<\/td>\nDownload content.<\/td>\n<\/tr>\n
Hot wash mode<\/td>\n<\/td>\n<\/tr>\n
Valve nozzle<\/td>\n<\/td>\n<\/tr>\n
High shear<\/td>\nLower spindle speed, short stay in equipment.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbBow-legged\u00bb]<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n
POSSIBLE CAUSE<\/span><\/strong><\/td>\n\n
SUGGESTED SOLUTION<\/span><\/strong><\/div>\n<\/td>\n<\/tr>\n
Cooling too intensive.<\/td>\nIncrease the cooling time inside the mold.<\/td>\n<\/tr>\n
Improper design of the piece.<\/td>\n<\/tr>\n
Cooling time too short.<\/td>\n<\/tr>\n
Inappropriate Extraction System<\/td>\n<\/tr>\n
Efforts in the material.<\/td>\nUse a reinforced polymer.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][\/vc_column][vc_column width=\u00bb1\/2″][vc_toggle title=\u00bbBlack spots\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n
POSSIBLE CAUSE<\/span><\/strong><\/td>\nSUGGESTED SOLUTION<\/span><\/strong><\/td>\n<\/tr>\n
There are carbonizations.<\/td>\nBleed the spindle.<\/td>\n<\/tr>\n
Reduce the process temperature.<\/td>\n<\/tr>\n
Clean the spindle manually.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbOrange peel\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n
POSSIBLE CAUSE<\/span><\/strong><\/td>\nSUGESTED SOLUTION<\/span><\/strong><\/td>\n<\/tr>\n
Incompatibility of the material.<\/td>\nDecrease the process temperature.<\/td>\n<\/tr>\n
Increase mold temperature.<\/td>\n<\/tr>\n
Change the color concentrate.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbIncomplete part\u00bb]<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n\n\n
POSSIBLE CAUSE<\/span><\/strong><\/td>\n\n
SUGGESTED SOLUTION<\/span><\/strong><\/div>\n<\/td>\n<\/tr>\n
Insufficient material in the cavity.<\/td>\nInject more material.<\/td>\n<\/tr>\n
Lack of material in the hopper.<\/td>\n<\/tr>\n
Cannon too small.<\/td>\nChange the mold to a machine of greater capacity.<\/td>\n<\/tr>\n
Temperature too low.<\/td>\nIncrease the barrel temperature<\/td>\n<\/tr>\n
Obstruction of the hopper or nozzle.<\/td>\nClean and release of glued material.<\/td>\n<\/tr>\n
Valve plugged.<\/td>\n<\/tr>\n
Holding time too short.<\/td>\nIncrease injection speed.<\/td>\n<\/tr>\n
Injection speed too low.<\/td>\n<\/tr>\n
Channels too small.<\/td>\nModify the size of the mold channels.<\/td>\n<\/tr>\n
Insufficient breathing.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbBurr part\u00bb]<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n
POSSIBLE CAUSE<\/span><\/strong><\/td>\nSUGGESTED SOLUTION<\/span><\/strong><\/td>\n<\/tr>\n
Excessive dosage.<\/td>\nDose less material.<\/td>\n<\/tr>\n
Injection temperature too high.<\/td>\nDecrease the injection temperature.<\/td>\n<\/tr>\n
Injection pressure too high.<\/td>\nDecrease injection pressure.<\/td>\n<\/tr>\n
Very long injection time.<\/td>\nDecrease injection time.<\/td>\n<\/tr>\n
Very high mold temperature.<\/td>\nDecrease mold temperature.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbJoining lines\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n
POSSIBLE CAUSE<\/strong><\/span><\/td>\nSUGGESTED SOLUTION<\/strong><\/span><\/td>\n<\/tr>\n
General temperature very low in the mold.<\/td>\nIncrease the temperature.<\/td>\n<\/tr>\n
Fade temperature not uniform.<\/td>\nUnify temperature in dice.<\/td>\n<\/tr>\n
Injection pressure too low.<\/td>\nIncrease the pressure.<\/td>\n<\/tr>\n
Injection speed too low.<\/td>\nIncrease injection speed.<\/td>\n<\/tr>\n
Insufficient breathing in the junction zone of the found flows.<\/td>\nModify the respiration of the material in the mold.<\/td>\n<\/tr>\n
Not uniform filling speed.<\/td>\nIncrease injection speed.<\/td>\n<\/tr>\n
Unsuitable flow of material through channels or cavity.<\/td>\nModify the gate to standardize the flow.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbDegradation by trapped air\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n
POSSIBLE CAUSE<\/strong><\/span><\/td>\nSUGGESTED SOLUTION<\/strong><\/span><\/td>\n<\/tr>\n
Humidity\/ moisture<\/td>\nDry the material.<\/td>\n<\/tr>\n
Degradation of additives.<\/td>\nDecrease the temperature.<\/td>\n<\/tr>\n
Temperature too high<\/td>\n<\/tr>\n
Insufficient mold respiration.<\/td>\nModify mold breathing.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbDelamination of layers\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n
POSSIBLE CAUSE<\/strong><\/span><\/td>\nSUGGESTED SOLUTION<\/strong><\/span><\/td>\n<\/tr>\n
Temperature too low.<\/td>\nIncrease the temperature.<\/td>\n<\/tr>\n
Injection speed too low.<\/td>\nIncrease injection speed.<\/td>\n<\/tr>\n
Low back pressure of the machine.<\/td>\nIncrease machine back pressure.<\/td>\n<\/tr>\n
Mold temperature too low.<\/td>\nIncrease mold temperature.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbFractures or cracks on the surface\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n
POSSIBLE CAUSE<\/strong><\/span><\/td>\nSUGGESTED SOLUTION<\/strong><\/span><\/td>\n<\/tr>\n
Mold temperature too low.<\/td>\nIncrease the temperature<\/td>\n<\/tr>\n
Ejection system too aggressive or inappropriate.<\/td>\nModify ejector bars.<\/td>\n<\/tr>\n
Use a robot to remove the piece<\/td>\n<\/tr>\n
Excessive packing.<\/td>\nDecrease the holding pressure.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbEjector bar marks\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n
POSSIBLE CAUSE<\/span><\/strong><\/td>\nSUGGESTED<\/span><\/strong><\/td>\n<\/tr>\n
Cooling time too short.<\/td>\nIncrease the cooling time.<\/td>\n<\/tr>\n
High mold temperature.<\/td>\nDecrease the melt temperature.<\/td>\n<\/tr>\n
Polymer temperature too high.<\/td>\n<\/tr>\n
Inadequate location of ejector bars.<\/td>\nModify the location of ejector bars.<\/td>\n<\/tr>\n
Ejection speed too high.<\/td>\nDecrease ejection speed.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbBurned the piece\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n
POSSIBLE CAUSE<\/span><\/strong><\/td>\nSUGGESTED SOLUTION<\/span><\/strong><\/td>\n<\/tr>\n
Burned by jet effect.<\/td>\nDecrease injection speed.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbThe color concentrate does not mix\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n
\n
POSSIBLE CAUSE<\/span><\/strong><\/div>\n<\/td>\n
SUGGESTED SOLUTION<\/span><\/strong><\/td>\n<\/tr>\n
Incorrect temperature profile.<\/td>\nTest an inverse temperature profile.<\/td>\n<\/tr>\n
Lower the temperature of the first two areas of the injection unit.<\/td>\n<\/tr>\n
Use a more aggressive temperature profile.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbThe color is darker\u00bb]<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n
POSIBLE CAUSE<\/strong><\/span><\/td>\nSUGGESTED SOLUTION<\/strong><\/span><\/td>\n<\/tr>\n
The temperature is too high.<\/td>\nDecrease the temperature.<\/td>\n<\/tr>\n
The gate is too small and the polymer burns under pressure.<\/td>\nModify the mold gate.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbBad wall thickness distribution (top down)\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n
POSSIBLE CAUSE<\/strong><\/span><\/td>\nSUGGESTED SOLUTION<\/strong><\/span><\/td>\n<\/tr>\n
Comparison narrowing down.<\/td>\nUse of comparison programmin.<\/td>\n<\/tr>\n
Increase extrusion speed comparison.<\/td>\n<\/tr>\n
Lower temp. Stock<\/td>\n<\/tr>\n
Use material with less MI<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbAsymmetric Part\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n
POSSIBLE CAUSE<\/strong><\/span><\/td>\nSUGGESTED SOLUTION<\/strong><\/span><\/td>\n<\/tr>\n
Comparison twisted falls.<\/td>\nStretch the comparison drop Pre pinch and comparison punch pre.<\/td>\n<\/tr>\n
The symmetric is not part.<\/td>\nUse the die setting to increase the thickness of the thin surface.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbPoor welding\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n
POSSIBLE CAUSE<\/strong><\/span><\/td>\nSUGGESTED SOLUTION<\/strong><\/span><\/td>\n<\/tr>\n
moisture mushrooms<\/td>\nReduce mold as much as possible<\/td>\n<\/tr>\n
Incorrect closing speed<\/td>\nIncrease or decrease the speed of closing of the final mold (deceleration).<\/td>\n<\/tr>\n
Increase cushion gap for the start of the deceleration.<\/td>\n<\/tr>\n
Blown air body<\/td>\nDetermine the pizaca depth of the bag suitable for the weight of the part.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbPoor in line of separation\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n\n
\n
POSSIBLE CAUSE<\/span><\/strong><\/div>\n<\/td>\n
SUGGESTED SOLUTION<\/span><\/strong><\/td>\n<\/tr>\n
Low blowing pressure<\/td>\nIncrease air pressure<\/td>\n<\/tr>\n
Remove excess restrictions on air lines, disconnect dividing lines of vents.<\/td>\n<\/tr>\n
Disconnect dividing line of vents.<\/td>\n<\/tr>\n
Low rate air stroke<\/td>\nIncrease air pressure.<\/td>\n<\/tr>\n
Remove excess restrictions on air lines.<\/td>\n<\/tr>\n
Disconnect dividing line of vents.<\/td>\n<\/tr>\n
Cause more ventilation.<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n
Trapped air<\/td>\nCause more ventilation.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbHitch\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n
POSSIBLE CAUSE<\/span><\/strong><\/td>\nSUGGESTED SOLUTION<\/span><\/strong><\/td>\n<\/tr>\n
Thickness imbalance<\/td>\nAdjust bushings<\/td>\n<\/tr>\n
Uneven temperature<\/td>\ncheck heaters in head area<\/td>\n<\/tr>\n
Dirty head<\/td>\nclean head<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][vc_toggle title=\u00bbExplosions \/ holes\u00bb]\"\"<\/p>\n\n\n\n<\/colgroup>\n\n\n\n
POSSIBLE CAUSE<\/span><\/strong><\/td>\nSUGGESTED SOLUTION<\/span><\/strong><\/td>\n<\/tr>\n
Nozzle Pollution<\/td>\nPurge<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

[\/vc_toggle][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":"

[vc_row][vc_column][vc_column_text] DEFECTS THAT ARE PRESENTED IN THE PROCESS OF TRANSFORMATION (Click on each option to see more information) [\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=\u00bb1\/2″][vc_toggle title=\u00bbExtracting the mold piece difficulty\u00bb] POSSIBLE CAUSE SUGGESTED SOLUTION – Pieces too cold. Verify mold temperature. – Excessive packing of the material. Reduce packing pressure. – Defects in the mold (finish, design). Possible surface coating […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2339","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/polymat.com.mx\/polymat\/index.php\/wp-json\/wp\/v2\/pages\/2339","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/polymat.com.mx\/polymat\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/polymat.com.mx\/polymat\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/polymat.com.mx\/polymat\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/polymat.com.mx\/polymat\/index.php\/wp-json\/wp\/v2\/comments?post=2339"}],"version-history":[{"count":25,"href":"https:\/\/polymat.com.mx\/polymat\/index.php\/wp-json\/wp\/v2\/pages\/2339\/revisions"}],"predecessor-version":[{"id":2367,"href":"https:\/\/polymat.com.mx\/polymat\/index.php\/wp-json\/wp\/v2\/pages\/2339\/revisions\/2367"}],"wp:attachment":[{"href":"https:\/\/polymat.com.mx\/polymat\/index.php\/wp-json\/wp\/v2\/media?parent=2339"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}