LCPÀÇ »çÃ⼺Çü Á¶°Ç[Injection Molding Conditions for LCP]


ÀϹÝÀûÀÎ ¼ºÇüÁ¶°Ç[General Molding Conditions]
Condition Items E5000Series E4000Series E6000Series E6000HFSeries E7000Series
Pre-drying Temperature about 130 °C
Time 4 to 24 hours
Cylinder temperature ( °C) Rear 350 - 370 330 - 350 280 - 320 280 - 320 280 - 300
Center 370 - 390 350 - 370 320 - 350 320 - 340 300 - 320
Front 390 - 410 370 - 390 340 - 370 340 - 360 320 - 340
Nozzle 390 - 410 370 - 390 340 - 370 340 - 360 320 - 340
Suitable resin temperature( °C) 400 380 350 350 320
Tool Temperature( °C) 40 - 160
Injection pressure(MPa) 120 - 160 80 - 160
Hold pressure(MPa) 40 - 60 20 - 40
Screw back-pressure(MPa) 1 - 5
Injection speed Middle - High
Screw revolution(rpm) 50 - 100
¸¸¾à ½Ç¸°´õ ¼³Á¤ ¿Âµµ¿Í ½ÇÁ¦ ¼öÁö ¿Âµµ°¡ ´Ù¸£´Ù¸é, ½ÇÁ¦ÀÇ ¼öÁö ¿Âµµ·Î °ü¸®ÇÒ ÇÊ¿ä°¡ ÀÖ½À´Ï´Ù.

¿¹ºñ°ÇÁ¶[Pre-drying]
SUMIKASUPER LCP´Â Èí¼öÀ² 0.02%·Î ¸Å¿ì ³·±â ¶§¹®¿¡ Àå½Ã°£ °ÇÁ¶´Â ÇÊ¿ä·Î ÇÏÁö ¾Ê½À´Ï´Ù.
ÀϹÝÀûÀ¸·Î, È£ÆÛ µå¶óÀ̾ ÀÌ¿ëÇØ,130¡É¸¦ ±âÁØÇØ,4½Ã°£ ÀÌ»ó 24½Ã°£ À̳»·Î °ÇÁ¶Çϸé ÃæºÐÇÕ´Ï´Ù.
 
¼ºÇü¿Âµµ[Molding Temperature]
½Ç¸°´õ ¾ÕºÎºÐ ¹× ³ëÁñºÎÀÇ ¿Âµµ¸¦ ³Ê¹« ¿Ã¸®¸é, »çÃâ½Ã¿¡ ¼öÁö°¡ È£ÆÛÃø¿¡ ¹é Ç÷οìÇϱ⠽¬¿öÁö±â ¶§¹®¿¡ ¹Ù¶÷Á÷
ÇÏÁö´Â ¾Ê½À´Ï´Ù.ƯÈ÷, °íÀ¯µ¿¼ºÀÌ ¿ä±¸µÇ´Â º¹ÀâÇÑ Çü»óÀÇ °Í, ¶Ç L/T°¡ Å« °ÍÀ» ¼ºÇüÇÏ´Â °æ¿ì¿¡´Â,
½Ç¸°´õ ¾ÕºÎºÐ º¸´Ù ³ëÁñºÎºÐÀÇ ¿Âµµ¸¦ Á¶±Ý ³ô°Ô ¼³Á¤ÇÕ´Ï´Ù.
±×¸®°í, °è·® ½Ã°£ÀÌ ¾ÈÁ¤µÇÁö ¾Ê´Â °æ¿ì¿¡´Â, ½Ç¸°´õ ÈĺÎÀÇ ¿Âµµ¸¦ 10~20¡É ³·°Ô ¼³Á¤ÇØ ÁÖ¼¼¿ä.

³ëÁñ ¿ÂµµÀÇ °ü¸®´Â ƯÈ÷ ¸Å¿ì Áß¿äÇϹǷΠ¿Âµµ ¼¾¼­ÀÇ À§Ä¡³ª º¸¿Â¿¡´Â ¸Å¿ì Á¶½ÉÇØ ÁÖ¼¼¿ä.
³ëÁñºÎÀÇ ¼³Á¤ ¿Âµµ¿Í ½ÇÁ¦ ¼öÁöÀÇ ¿Âµµ°¡ ´Ù¸£¸é, ½ÇÁ¦ÀÇ ¼öÁö ¿Âµµ·Î °ü¸®°¡ ÇÊ¿äÇÕ´Ï´Ù.
SUMIKASUPER LCP´Â,
E5000½Ã¸®Áî·Î 400¡ÉÀÌ»ó, E4000½Ã¸®Áî·Î 380¡ÉÀÌ»ó, E6000½Ã¸®Áî·Î 340¡É, E6000HF½Ã¸®Áî·Î 340¡ÉÀÌ»ó,
E7000½Ã¸®Áî·Î 320¡ÉÀÌ»óÀÇ ¼ºÇü ¿Âµµ·Î ¾ÈÁ¤µÈ ¹°¼ºÀ» ¾òÀ» ¼ö ÀÖ½À´Ï´Ù.
±×¸®°í, ¿ëµµ¿¡ µû¶ó¼­´Â, ÀÌ°Í ÀÌÇÏÀÇ ¿Âµµ·Î ¼ºÇüÀ» ½Ç½ÃÇصµ ½Ç¿ë»ó ¹®Á¦°¡ ¾ø´Â ¹°¼ºÀ» ¾òÀ» ¼ö ÀÖ½À´Ï´Ù¸¸,
¿Âµµ¸¦ ³Ê¹« ³»¸®¸é ¹°¼º ÀúÇϸ¦ µ¿¹ÝÇÏ´Â °æ¿ì°¡ ÀÖ½À´Ï´Ù. (Figure 1, Figure 2)
Figures 1 ÀÎÀå°­µµÀÇ ±ÝÇü¿Âµµ ÀÇÁ¸¼º
 
Tool Temperature : 130 °C
Injection pressure : ca. 130MPa (ca. 1300kg/cm2)
Injection speed : Medium
 
Figures 2 ¼ºÇü¼öÃàÀ²ÀÇ ±ÝÇü¿Âµµ ÀÇÁ¸¼º

±ÝÇü¿Âµµ[Tool Temperature]
SUMIKASUPER LCP´Â ºÐÀÚ°¡ °­Á÷Çϱ⠶§¹®¿¡ ¿ëÇØ »óÅ¿¡¼­µµ µÚ¾ûÅ´ÀÌ ¾ø°í,¼ºÇü½ÃÀÇ Àü´Ü¿¡ ÀÇÇØ °íºÐÀÚ
¼è»ç½½ÀÌ È帧¹æÇâÀ¸·Î ¹èÇâ ÇÕ´Ï´Ù.
°Ô´Ù°¡ °íüȭ ¼Óµµ°¡ ¸Å¿ì ºü¸£±â ¶§¹®¿¡, °íüȭ½Ã¿¡ À־µµ ¿ëÇؽÃÀÇ ¹èÇâ »óŸ¦ À¯ÁöÇÏ°í ÀÖ¾î,
¿ªÇÐ ¹°¼ºÀÇ ±ÝÇü ¿Âµµ¿¡ ÀÇÇÑ ¿µÇâÀº °ÅÀÇ ¾ø½À´Ï´Ù.
¾ãÀºÁ¦Ç°À» ¼ºÇüÇÏ´Â °æ¿ì,¼ºÇü»çÀÌŬÀ» Áß½ÃÇÏ´Â °æ¿ì¿¡´Â 70~100¡É¿¡,Weld °­µµ¸¦ °í·ÁÇÏ´Â °æ¿ì¿¡´Â,120~150¡É¿¡
¼ºÇüÇ¥¸éÀÇ ÆòÈ°¼ºÀ» Áß½ÃÇÏ´Â °æ¿ì¿¡´Â 160~190¡É·Î ¼³Á¤ÇÏ´Â °ÍÀ» ÃßõÇÕ´Ï´Ù.
Figures 3
 

»çÃâ¾Ð·Â°ú »çÃâ¼Óµµ[Injection Pressure and Injection Speed]
SUMIKASUPER LCP´Â ¿ëÇØ Á¡µµ°¡ ³·°í, À¯µ¿¼ºÀÌ ¶Ù¾î³ª±â ¶§¹®¿¡, ³Ê¹« ³ôÀº »çÃ⠾зÂÀ» ÇÊ¿ä·Î ÇÏÁö ¾Ê½À´Ï´Ù.
E6000½Ã¸®Á ¿¹¸¦ µé¸é, ¼ºÇü ¿Âµµ¸¦ 350¡ÉÀÌ»óÀ¸·Î ¿Ã¸®´Â °ÍÀ¸·Î 40MPaÁ¤µµÀÇ Àú¾Ð¿¡¼­µµ ÃæºÐÇÑ À¯µ¿¼ºÀ» ³ªÅ¸³À´Ï´Ù.
±×¸®°í, »çÃ⠾зÂÀ»65~160MPaÀÇ ¹üÀ§¿¡¼­ º¯È­½ÃÄѵµ ÀÎÀå °­µµ´Â °ÅÀÇ º¯È­ÇÏÁö ¾Ê½À´Ï´Ù.
»çÃâ ¼Óµµ´Â, ¾ã°í,º¹ÀâÇÑ Çü»óÀ» °¡Áö´Â Á¦Ç°¿¡ ´ëÇؼ­´Â, Áß ~°í¼ÓÀ¸·ÎÀÇ ¼ºÇüÀÌ ¹Ù¶÷Á÷ÇÕ´Ï´Ù¸¸, ºñ±³Àû ÈÄÀ°ÀÇ
Á¦Ç°À¸·Î Weld°¡ ¹®Á¦°¡ µÇ´Â °æ¿ì¿¡´Â, ±ÝÇü³»ÀÇ Gas»©±â¸¦ °í·ÁÇÑ ´ÙÀ½ 20~40mm/sec.ÀÇ Áß¡¤Àú¼ÓÀÌ ÀûÇÕÇÕ´Ï´Ù.
ÆÛ¡¹æ¹ý[Purging Methods]
SUMIKASUPER LCPÀÇ ÆÛ¡¹æ¹ý¿¡ ´ëÇÏ¿© ¼³¸í ÇÏ°Ú½À´Ï´Ù.
Ãßõ ÆÛ¡Á¦: Z Clean S11 [manufactured by Chisso Corporation]
                   Amte Clean EX [Manufactured by Matsushita Amtech Corporation]
The following precautions must be taken when performing purging operations:
Please note that E4000 and E5000 series grades require high processing temperatures, thus may cause fuming, gas emission and resin scattering.
Ensure that none of the purging agent is left in the cylinder.
µ¿ÀÏ Grade¸¦ »ç¿ëÇÑ °æ¿ì
1 End of molding Shoot out all remaining resin (from within both hopper and cylinder).
2 Feeding of purging agent Perform purging while maintaining the cylinder temperature at the molding temperature.
3 Continuation of purging Set the cylinder temperature to a temperature 20 - 30 °C lower than the molding temperature.
4 Displacement of resin As soon as all purging agent has been shot out, immediately feed in the SUMIKASUPER LCP, to displace the cylinder contents with SUMIKASUPER LCP.
5 End of operation Turn OFF the power. (It is OK to power down while the temperature is decreasing.)
6 Resumption of operation Turn ON the power.
Set the cylinder temperature to a temperature 20 - 30 °C lower than the molding temperature.
7 Pre-purging Perform purging using SUMIKASUPER LCP (5 shots) at a cylinder temperature that is 20 - 30 °C lower than the molding temperature.
8 Start of production Raise the cylinder temperature to the molding temperature.
Note) When using different colored resins from the same LCP grade, please omit the above procedures 5, 6 and 7.
SUMIKASUPER LCP·Î º¯È¯
1 End of molding Shoot out all preceding resin (from within both hopper and cylinder).
2 Raising of cylinder temperature Set the cylinder temperature to a temperature 20 - 30 °C lower than the molding temperature for SUMIKASUPER LCP.
3 Feeding of purging agent As soon as the temperature has risen to the above temperature setting, immediately begin feeding the purging agent.
(Note) Once the temperature has increased, ensure that the rotation prevention mechanism does not become actuated.
4 Displacement of resin As soon as all purging agent has been shot out, immediately feed in the SUMIKASUPER LCP, to displace the cylinder contents with SUMIKASUPER LCP.
5 Resumption of operation Set the cylinder temperature to the molding temperature for SUMIKASUPER LCP.
6 Start of production After the cylinder temperature has risen, purge with at least 5 shots of SUMIKASUPER LCP prior to starting production.

Flashing Defect
SUMIKASUPER LCP´Â °íÀ¯µ¿À¸·Î Flash°¡ ¹ß»ýÇϱ⠾î·Æ°í,¾ãÀº¼ÒÇüÀÇ ÀüÀÚºÎÇ°À» ¼ºÇüÇϴµ¥ ÀûÇÕÇÑ Àç·á ÀÔ´Ï´Ù.
Figure 5´Â Flash Ư¼ºÀ» ³ªÅ¸³»´Â ±ÝÇüÀ» ÀÌ¿ëÇØ Æò°¡ÇÑ °á°ú¸¦ ³ªÅ¸³À´Ï´Ù.
ÀÌ ±×¸²Àº,(i.e., areas where short shots defect and flashing defect occur).³ªÅ¸³À´Ï´Ù.
SUMIKASUPER LCP´Â Short Shots and flashingÀÌ ¹ß»ýÇÏÁö ¾Ê´Â ¿µ¿ªÀÌ ³Ð°Ô Á¸ÀçÇϸç,
PPSȤÀºPBT´Â flash°¡ ¹ß»ýÇϱ⠽±°í,thin-walled products¸¦ ¼ºÇü½Ã¿¡´Â Short Shot¿µ¿ªÀ» È®º¸Çϴ°ÍÀÌ °ï¶õÇÕ´Ï´Ù.
Figure 4 Tool for Evaluation of Flash Properties
Figure 5 Flash Properties of various Engineering plastics (0.5/0.3mm Double Thiclnesses)