ENTLÜFTUNGSEINSATZ MIT DURCHLÄSSIGER STRUKTUR (PRVT20-A100-B100-T50)

Related Information

■ How to Mount
1. Machine the POROUS VENT to match the shape of the molded part. Refer to the left page for treatment after machining.
2. Machine mounting holes and gas release passage into the mold. Be sure to clean with compressed air when finished to make sure that no particles remain, as they may cause clogging.
3. If you need to tap the POROUS VENT during installation, use a strike plate to ensure that the vents do not collapse.
4. When checking the ventilation, apply acetone or alcohol to the surface of the molded product and blow from the opposite side. If bubbles emerge from the entire surface, the product is normal.

■ For Use
· Ventilation recovery processing is necessary after shipment, as all surfaces are non-ventilated.
· Shave the rear surface to secure ventilation by making sure the POROUS VENT walls are not too thick.
· Grinding should be done so as to avoid ventilating the surface, other than for gas release.
· Periodic maintenance is required. Refer to the methods on the left page.
· For cooling, consider using a heat exchanger pipe (WHP) to avoid cooling water flowing directly through the water hole if water leaks. In that case, it is more effective to apply 0.05 to 0.1 mm heat conducting grease (MTJ) between the POROUS VENT and the cooling parts.
· Avoid installation of ejector pins, fixing pins, or inserted items on the POROUS VENT. When gas and air pass through the protruding holes, exhaust and blowing from the gas release holes may become insufficient, causing the released gas and air to return from the protruding holes to the molding surface and cause visual defects on the surface around the pin.
· To prevent rusting, do not store in high-temperature/high-humidity environments or those with fine dust.

■ Examples of Machining Conditions
[Table 1] shows an NC milling example while[Table 2] shows a laser machining example.
Check your specific equipment, as other machining methods differ depending on the equipment.

■ Post-Machining Treatment
• Oil draining
Always drain the oil for discharge machining, wire cutting, NC milling, etc., as impregnation with machining fluid can cause ventilation failure and rust. Refer to [Table 3] for differences in ventilation with and without oil drainage.
• Polished finishing
Finish according to the following procedure.
(1) Polish once with a fine (#800 recommended) oil stone, then rotate 90°and polish a second time.
(2) Polish with an ultra-fine (#1200 recommended) oil stone. (3) Buff using a paste-type polishing agent (0.5 to 1 μm particle size recommended).If necessary, use even finer sandpaper (#2500) to polish further.

Machining conditions NC milling: [Table 1] Laser: [Table 2]
Measurement conditions · Test piece size: φ20 x 10 mm · Air pressure: 0.3 Mpa

■ Oil Drainage Method

■ Maintenance Method