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透气钢的清洗和维护

1.首次使用透气钢清洗方法

经过研磨或者放电加工，透气性已经恢复，安装透气钢工件之前的清洗。

• 经过研磨或者放电加工，透气性已经恢复之后，透气钢应放在约150℃的烘箱中保持约2-3小时。这将清楚大部分渗透进空隙结构的液体。

• 干燥后让其恢复室温，放入装有丙酮的超声波清洗装中，清洗装置建议有火花防爆开关、冷水机组、、温度监控功能，这是推荐的清洁porcerax II透气钢方法。

• 使用风枪冲洗表面，每小时更换一次丙酮，当丙酮干净时可结束清洗。

• 清洗完毕后，放置透气钢使其完全干燥，或使用烘箱加热干燥。

流程：干燥→→清洗→→干燥
注：a.透气钢可在空腔侧钻孔攻丝，反冲洗孔的设计应可接受车间空气接头，方便日后的清洗维护操作，这个设计对于提高透气钢工件寿命非常有用，如下图所示；
b.以上清洁步骤可能需要重复；
c.丙酮是易燃液体，请确保工件温度是室温，切勿使用超声波清洗装置的加热功能。

2.透气钢使用过程中的清洗维护

透气钢工件在使用一段时间后，气孔部分或完全堵塞时需要重新清洗，以恢复透气性

喷涂或刷涂丙酮、模具清洁剂或溶剂在透气钢污染面，等几分钟，使用风枪冲洗，或使用上图所示的反冲洗孔。
如堵塞严重或者方便，最佳的清洗方式应是同上使用超声波清洗装置。
注意：如PORCERAX II透气钢工件使用dichtol密封水管线都存在，清洗过后需要重新密封。
使用某些工程树脂，可能有必要用其他化学产品清洁PORCERAX II，如至于6-8％氢氧化钠溶液中。这可以在温度高达60℃超声波清洗机使用。期限不超过40分钟，立即用水作为中和剂冲洗防止腐蚀，然后置于水中进行45分钟的超声波清洗。
流程：干燥→→清洗→→干燥

Cleaning, Maintenance and Resin Removal
There are two times cleaning must to be performed to Porcerax II:
The first time is when the tool shop has prepared the insert or cavity. The material is 25% air by volume and the cutting fluids will displace the air, thus filling and clogging the pores. After the permeability has been restored, by either stoning or EDMing the venting surface, the steel should be placed in an oven at about 350°F. for approximately 2-3 hours. This will thin and remove most of the fluids in the pore structure. Once cooled to room temperature, place the insert in an ultrasonic cleaning unit (built for flammable solvents) filled with acetone. These units have spark-proof switches, water chillers and are temperature monitored.This is the only recommended type cleaner for cleaning Porcerax II.
The steel should be thoroughly blown dry through a drilled, tapped, and EDM-relieved hole in the side of the insert or cavity. This clean-out or back-flush hole should be designed to accept a shop air fitting. This will be very useful over the life of the insert in back-flushing fluid and future residue from the insert, and for checking restored permeability with filtered shop air. (See photo below.) If the cleaning operation is not completed, due to the trapped fluids, inside permeability will not exist.
Note: In addition to the other cleaning methods, it may be necessary to back-flush the Porcerax II inserts with acetone, using air pressure, in order to thoroughly clean the inserts. Care should be taken when using solvents under pressure.
Note: These cleaning steps may need to be repeated
Note: Do not use any heating device that may be supplied by the ultrasonic cleaner.
The second time cleaning is needed is after the insert or cavity has been in operation and film, a thin layer of mold release agent, resin residue, shop oil or any other contaminate has partially or totally blocked the air flow. There are two primary ways to clean this surface:
Spray or brush a liberal amount of acetone, mold cleaner or solvent onto the contaminated surface of the steel, wait a few minutes, then back-flush the insert with filtered compressed air. This can be done through the drilled and tapped hole previously discussed. Or, if material is inserted, by tapping the exhaust line that exits the core block and attaching an air fitting there.
The second and preferred way
to clean the porous material is to remove the insert or take the small cavity and place the insert in an ultrasonic cleaning unit (built for flammable solvents) filled with acetone. These units have spark-proof switches, water chillers, and are temperature mounted.
This is the only recommended type cleaner for cleaning Porcerax II.
Note: In addition to the other cleaning methods, it may be necessary to back-flush the Porcerax II inserts with acetone, using air pressure, in order to thoroughly clean the inserts. Care should be taken when using solvents under pressure.
Note: Either of these cleaning steps may need to be repeated
Note: When cleaning Porcerax II, if Dichtol sealed waterlines are present, the need to
reseal these waterlines will be required.
Note: With some engineered resins it may be necessary to clean Porcerax II inserts with other chemicals such as a 6 to 8% Sodium Hydroxide solution. This can be used in an ultrasonic cleaner with temperatures up to 160 degrees F, for a period not to exceed 40 minutes. Immediate flushing with water as a neutralizer should take place in order to prevent corrosion within the Porcerax II insert. A 45-minute ultrasonic cleaning in water should follow this. Then remove the insert and dry with filtered compressed air. Consult your chemical supplier for the necessary safety instructions!