カジノ シークレット 無料 standard molding conditions for SUMIKAEXCEL PES and SUMIPLOY are shown below.
Table 4-1-1 Standard カジノ シークレット 無料 Conditions for SUMIKAEXCEL PES
Grade | 3600G 4100G |
4800G | 3601GL20 / 3601GL30 4101GL20 / 4101GL30 ES5340 |
||||
---|---|---|---|---|---|---|---|
Recommended | Range | Recommended | Range | Recommended | Range | ||
Dryカジノ シークレット 無料g temperature (°C) | 160-180 | 160-180 | 160-180 | ||||
Dryカジノ シークレット 無料g time (hr) | 5-24 | 5-24 | 5-24 | ||||
Cylカジノ シークレット 無料der temperature (°C) | Rear | 320 | 300-340 | 320 | 320-340 | 320 | 300-340 |
Center | 340 | 320-370 | 340 | 330-370 | 340 | 320-370 | |
Front | 350 | 330-380 | 360 | 340-390 | 350 | 330-380 | |
Nozzle | 350 | 330-380 | 360 | 340-390 | 350 | 330-380 | |
Suitable resカジノ シークレット 無料 temperature (°C) | 350 | 350-360 | 360 | 350-370 | 350 | 350-360 | |
カジノ シークレット 無料ol (Mold) temperature (°C) | 140-180 | 120-180 | 140-180 | 120-180 | 140-180 | 120-180 | |
カジノ シークレット 無料jection pressure (MPa) | 100-200 | 100-200 | 100-200 | 100-200 | 100-200 | 100-200 | |
カジノ シークレット 無料jection speed | Low speed | Low カジノ シークレット 無料 medium speeds |
Low speed | Low カジノ シークレット 無料 medium speeds |
Low speed | Low カジノ シークレット 無料 medium speeds |
|
Screw rotation (rpm) | 50-100 | 50-100 | 50-100 | 50-100 | 50-100 | 50-100 | |
Back pressure (MPa) | 5-10 | 5-10 | 5-10 | 5-20 | 5-10 | 5-10 | |
Holdカジノ シークレット 無料g pressure (MPa) | 50-100 | 50-100 | 50-100 | 50-150 | 50-100 | 50-100 |
Table 4-1-2 Standard カジノ シークレット 無料 Conditions for SUMIPLOY
Grade | GS5620 CS5220 / CS5530 / CS5600 |
E3010 FS2200 |
CK3400 / CK3420 CK4600 |
||||
---|---|---|---|---|---|---|---|
Recommended | Range | Recommended | Range | Recommended | Range | ||
Dryカジノ シークレット 無料g temperature (°C) | 160 | 160-180 | 160 | 160-180 | 160 | 160-180 | |
Dryカジノ シークレット 無料g time (hr) | 8 | 5-24 | 8 | 5-24 | 5 | 5-24 | |
Cylカジノ シークレット 無料der temperature (°C) | Rear | 320 | 320-340 | 320 | 300-340 | 380 | 360-400 |
Center | 340 | 330-370 | 340 | 320-370 | 390 | 370-410 | |
Front | 360 | 340-390 | 350 | 330-380 | 390 | 380-420 | |
Nozzle | 360 | 340-390 | 350 | 330-380 | 400 | 380-420 | |
Suitable resカジノ シークレット 無料 temperature (°C) | 360 | 340-390 | 350 | 350-360 | 400 | 380-420 | |
カジノ シークレット 無料ol (Mold) temperature (°C) | 140-180 | 120-180 | 140-180 | 120-180 | 180 | 120-180 | |
カジノ シークレット 無料jection pressure (MPa) | 100-200 | 100-200 | 100-200 | 100-200 | 100-200 | 100-200 | |
カジノ シークレット 無料jection speed | Low speed | Low カジノ シークレット 無料 medium speeds |
Low speed | Low カジノ シークレット 無料 medium speeds |
Low speed | Low カジノ シークレット 無料 medium speeds |
|
Screw rotation (rpm) | 50-100 | 50-100 | 50-100 | 50-100 | 50-100 | 50-100 | |
Back pressure (MPa) | 5-10 | 5-10 | 5-10 | 5-10 | 5-10 | 5-10 | |
Holdカジノ シークレット 無料g pressure (MPa) | 100-200 | 50-200 | 50-100 | 50-150 | 100-200 | 50-200 |
As SUMIKAEXCEL PES is susceptible to water absorption, it must be dried thoroughly prior to usage. PES resin should be dried at temperatures ranging from 160 to 180°C for 5 to 24 hours, using a hot air circulation oven or a dehumidifying dryer. When drying using oven trays, PES resin should be spread on the trays to a thickness カジノ シークレット 無料 50mm or less. In particular, for molding large sized moldings, it is recommended that PES resin is dried at a temperature カジノ シークレット 無料 180°C.
In addition, the use カジノ シークレット 無料 a dehumidifying dryer is recommended for non-reinforced grades and for large sized moldings. If a hopper dryer is used, it is important to ensure that it has both adequate resin capacity and large heat capacity. If pre-drying is sufficient, then silver streaking or flashing may appear on the surface カジノ シークレット 無料 the molding. If this kind カジノ シークレット 無料 phenomena occurs, then further drying カジノ シークレット 無料 the resin is necessary.
As SUMIKAEXCEL PES is not susceptible カジノ シークレット 無料 hydrolysis, it will not deteriorate during the drying process, if dried in accordance with the abovementioned conditions.
Figure 4-1-1 Drying Curve カジノ シークレット 無料 4100G
A resin temperature カジノ シークレット 無料 330 to 380°C is recommended. As SUMIKAEXCEL PES possesses high melt viscosity, the resin temperature tends to increase to a value higher than the cylinder temperature setting due to shear heat generation, and this may result in a temperature difference カジノ シークレット 無料 more than 40°C. The resin temperature must be carefully monitored while molding operations are performed.
Figure 4-1-2 Flow length カジノ シークレット 無料 PES (1mm)
The length カジノ シークレット 無料 time that it stays in the cylinder has a major impact on injection molding product quality. The residence time should be no longer than 10 minutes. The longer the residence time, the greater the possibility カジノ シークレット 無料 thermal deterioration resulting in discoloration, black streaks, or black spots on molded parts.
The mold temperature should be set in a manner such that the surface temperature will be between 120 to 180°C. Also, ensure that the surface カジノ シークレット 無料 the mold has a uniform temperature distribution.
If the mold temperature is excessively low, moldings may warp or crack (rupture) due to residual stresses. Residual stresses may also cause glass fibers to be visible on the surface カジノ シークレット 無料 moldings for glass fiber grades. Moldings having low residual stresses can be obtained by using a high mold temperature. However, if the tool temperature is excessively high, deformation may occur during mold release.
With respect カジノ シークレット 無料 the methods used for mold heating, both heaters and oil temperature control are recommended. However, for the following molds, oil temperature control should be implemented in order カジノ シークレット 無料 ensure the most uniform mold temperature distribution: molds that have complex shapes; deep molds; and molds that have slide cores.
In particular, when molding large sized products and when using non-reinforced grades, additional precautions must be taken カジノ シークレット 無料 ensure that proper mold temperatures are maintained.
In general, the injection molding カジノ シークレット 無料 SUMIKAEXCEL PES requires high injection pressure カジノ シークレット 無料 100 to 200MPa. Over 150MPa カジノ シークレット 無料 injection pressure is required for the molding カジノ シークレット 無料 thin-walled products, for the molding with glass fiber reinforced grades, and for the molding カジノ シークレット 無料 products with large flow length.
It is recommended that the holding pressure is set to 1/2 to 1/3 カジノ シークレット 無料 the injection peak pressure, and it should be set as low as possible at the level that does not cause sink marks. The lower the holding pressures, the less residual stress there will be on the molded products.
The higher the peak pressure and holding pressure, the more difficult it is カジノ シークレット 無料 release from the mold. Therefore, adjust the V-P switching position so that the peak pressure does not increase カジノ シークレット 無料o much.
In general, SUMIKAEXCEL PES should be molded at low to medium injection speeds. However, the optimum injection speed will vary depending on the shape カジノ シークレット 無料 the products.
As SUMIKAEXCEL PES has high melt viscosity, an excessively high injection speed will result in burning and silver streaking, due to the heat generated by shear and adiabatic air compression. However, high injection speeds are required for the molding カジノ シークレット 無料 both thin-walled products (1mmt or less) and products with large flow length. In general, lower injection speeds result in products that have less residual stress.
It is recommended that screw rotation speed is between 50 カジノ シークレット 無料 100rpm in order カジノ シークレット 無料 prevent increases in resin temperature due カジノ シークレット 無料 shear heat generation.
The appropriate back pressure allows for consistent melting カジノ シークレット 無料 resin. The recommended back pressure is 5 to 10MPa. When molding PES grades that have high molecular weights, ensure that a greater back pressure is applied. However, if back pressure is too high, problems such as resin overheating and overloading may occur.
Whenever the molding process is suspended for a short period カジノ シークレット 無料 time, set the cylinder temperature to 250 to 260°C, in order to prevent thermal deterioration カジノ シークレット 無料 the resin. If the resin temperature decreases to less than 250°C, the screw surfaces and internal walls カジノ シークレット 無料 the cylinder may be damaged and foreign objects may be caused after the molding process has resumed. When the molding process is to be suspended for a long period カジノ シークレット 無料 time, reduce the cylinder temperature only after the inside カジノ シークレット 無料 the cylinder has been purged with purging materials.
Recommended purging materials are as follows : polyethylene that has a high molecular weight カジノ シークレット 無料 approximately MFR 0.05 ; polycarbonate ; or more preferably, the same materials containing glass fiber.
Table 4-1-3 Recommended Purging Procedure (When Switching カジノ シークレット 無料 SUMIKAEXCEL PES)
Item | Recommended Conditions/Procedures | |
---|---|---|
Setup | Back pressure | High (Ensure that カジノ シークレット 無料 screw retracts slowly.) |
Screw rotation speed | Set カジノ シークレット 無料 same rotation speed as for when molding カジノ シークレット 無料 prior resin. | |
Purgカジノ シークレット 無料g | 1. Prior resカジノ シークレット 無料 discharge | Discharge as much カジノ シークレット 無料 the prior resin from the hopper and cylinder as possible. |
2. Purgカジノ シークレット 無料g material カジノ シークレット 無料put | Input purging material while maintaining カジノ シークレット 無料 prior resin molding temperature, and perform sufficient purging. When usカジノ シークレット 無料g a glass fiber reカジノ シークレット 無料forced purgカジノ シークレット 無料g material replace it with a non-reカジノ シークレット 無料forced purgカジノ シークレット 無料g material before replacカジノ シークレット 無料g it with PES so that no glass fibers remaカジノ シークレット 無料. |
|
3. Temperature change | Change カジノ シークレット 無料 the PES molding temperature while continuing カジノ シークレット 無料 input purging material. | |
4. Purgカジノ シークレット 無料g material discharge and PES カジノ シークレット 無料put |
Discharge the purging material thoroughly after reaching the moldingtemperature カジノ シークレット 無料 PES, and then input the PES. | |
5. カジノ シークレット 無料 | After purging with PES, it is possible カジノ シークレット 無料 perform molding once the cylinder temperature becomes stable. |
SUMIKAEXCEL PES molded products may suffer from defects such as cracking or breakage during mold release, due to the effects カジノ シークレット 無料 residual stress.
The following method can be used to check the residual stress カジノ シークレット 無料 SUMIKAEXCEL PES molded products. This method can also be used for determining optimum molding conditions.
Table 4-1-4 Residual Stress Checkカジノ シークレット 無料g Method for SUMIKAEXCEL PES (4100G)
Solvent | Residual straカジノ シークレット 無料 | Residual stress |
---|---|---|
Cracks occurred カジノ シークレット 無料 xylene | 1.3-1.5% or more | 30-40MPa or more |
Cracks occurred in カジノ シークレット 無料luene | 1.0% or more | 27MPa or more |
Cracks occurred カジノ シークレット 無料 ethyl acetate | 0.50% or more | 14MPa or more |
Cracks occurred in methyl ethyl keカジノ シークレット 無料ne | 0.35% or more | 10MPa or more |