STATIC ELECTRICITY SOLUTION APPLICATION SHEET

Transcription

1 STATIC ELECTRICITY SOLUTION APPLICATION SHEET

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11 De-electrify the product and silicon pad. Usinng a static eraser with a high blow volume could dry out the ink, so using a low or no blow volume is desirable. The product's electrostatic change could cause cobwebbing even when using adhesive to affix the labels, so it is best to use a static eraser.

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17 Blowing onto workbenches

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19 Examples of trouble caused by static electricity Troubles Caused by Static Electricity Dust sticking to lenses and mirrors Awkwardly stacked cups and containers Inadequate film pickup Inadequate product release from mold Improper positioning of small parts Electrostatic breakdown of electronic components Improper coating because of adhering dust Coating surface irregularity because of charging of product pickup unit Work clogging of parts feeder Ink runs or staining in printing * Before taking action against static electricity trouble, it is necessary to understand the phenomenon and cause. Trouble caused by dynamic action... Suction, repulsion >> (Trouble will persist as long as charge is not neutralized.) End trouble: Clogging, adhering matter, printing runs and stains, contamination, infection, etc. Charge: Maintained Trouble caused by ionization... Discharge, electric shock, fire >> (Charge is neutralized, but trouble occurs from that moment.) End trouble: Explosion, electrostatic breakdown, electromagnetic noise, nervous disorders, etc. Charge: Discharged >> Photo emission, noise of crack formation, accompanied by electromagnetic noise.

20 How Static Electricity Is Generated Why does static electricity occur? Normally, positive and negative charges are the same in number, thus balanced. When two objects rub together, unstable electrons start migrating, which is known as "charge migration". However, though electrons are migrating in this state, voltage is not generated between the two contacting objects. When the two objects are pulled apart, the electron counts are unbalanced. In this case, the object that received electrons is "negatively charged" whereas the object that gave up the electrons is "positively charged". If the negatively and positively charged objects are brought near to a grounded metallic object, the electrons suddenly migrate to the metal, which is known as "discharging". Terminology Static electricity The charge of one of two objects with the higher electron count whose electron migration was caused by contact, separation, friction or other action between the two objects Charging The accumulation of generated static electricity in an object (Note that all objects are always charged.) Charge The amount of electricity accumulated in an object

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22 Countermeasures to Static Electricity Basically, the below approaches are studied as countermeasures to static electricity and used to prevent trouble caused by static electricity. How not to generate static electricity (Minimize the amount of static electricity if unavoidably generated.) How not to charge with static electricity (Quickly release or leak any generated static electricity so that it does not accumulate.) How not to discharge static electricity (Do not discharge static electricity where fearful of explosion or fire, because it creates sparks.) Below are given some actual measures. There are various measures that differ by objective: "To prevent charging","to remove charge" in the event the object was charged and "To remove dust" that has adhered because of charging. To prevent charging Increase humidity. (Increase humidity to 65% or higher with a humidifier, sprayer, etc.) Use an antistatic agent. (Absorbs airborne moisture so that electricity can escape more easily.) Slowly peel or rub. (Harsh movements generate a lot of energy.) To remove charge Or to reduce static electricity that is unavoidably generated Create an escape route for static electricity. (Conductive mat, electrostatic shoes, grounding by wrist strap, etc.) Use a static eraser. (Balance unequal potential using ionized air.) To remove dust Use a static eraser. (As charge is neutralized, blow dust with compressed air.) Example measures using conductivity Conductor: Grounding is effective with objects that readily transfer electricity (electrical resistance 10 9 ). (Grounding is required for all equipment, systems and tools.) Nonconductor: A static eraser is effective with objects that electricity does not pass through. It is also effective when grounding is not possible.

23 Types of Static Erasers Compressed air type (Static electricity and dust removal) Product Lineup Fan blowing type (Static electricity removal) Photo Model code Dimensions Weight Consumption Current Ion Generation Method Input Voltage Output Voltage Air Pressure Air Consumption Air Flow Static Charge Decay Time Ion Balance Range Balance control Flow rate control Generated Amount of Ozone Electrode Wire Material The number of Discharge Needle Recommended Cleaning Interval. Working Temperature Range Working Humidity Range Transformer Rated Input Voltage Other SDJ-02R L92 W35 H55mm 175g 80mA or less High Voltage AC Corona Discharge AC20kHz 3.0KV DC24V 10% AC 3.0KV MPa 210r min. 0.7 Sec. *1 30V or less *2 None By controlling air flow 0.03ppm *7 Stainless steel 1 50 hr %RH PAT.P. SDJ-03R L154.5 W43.6 H36.5mm 250g 80mA or less High Voltage AC Corona Discharge AC20kHz 3.0KV DC24V 10% AC 3.0KV MPa 170r min. 1 Sec. *1 30V or less *2 None By controlling air flow 0.03ppm *7 Stainless steel 1 50 hr %RH AC V AC Adapter included AC VPlug:Type C SDJ-06R L172.5 W40 H156mm 515g 80mA or less High Voltage AC Corona Discharge AC20kHz 3.0KV DC24V 10% AC 3.0KV MPa 185r min. 0.7 Sec. *3 100V or less *4 None By controlling air flow 0.033ppm *7 Stainless steel 1 50 hr %RH AC V AC Adapter included AC VPlug:Type C Above data are measured at our inspection and may have slightly different figures according to the environment. *1 : V, measured at 150mm from the nozzle at 0.2 MPa *2 : measured at 150mm from the nozzle at 0.2 MPa *3 : V, measured at 150mm from the nozzle at 0.4 MPa *4 : measured at 300mm from the nozzle at 0.4 MPa PAT.P. SDJ-08S L132.5 W72 H73.5mm excluding clip 300g w/o clip 200mA High Voltage AC Corona Discharge AC68kHz 3.5KV DC24V 5% AC 3.5KV 0.8m 3 min. 2.9 Sec. *5 10V or less *6 None Free step control 0.007ppm *8 Inconel hr %RH AC V AC Adapter included AC VPlug:Type C *5 : V, measured at 300mm in the front of unit at maximum air flow *6 : measured at 300mm in the front of unit at maximum air flow *7 : measured at 300mm at 30 secs. *8 : measured at 300mm at maximum air flow. SDJ-09 PAT.P. L185 W240 D102mm 1.9kg 340mA High Voltage AC Corona Discharge AC68kHz 3.5KV DC24V 5% AC 3.5KV 2.8m 3 min. 1.6 Sec. *5 5V or less *6 None Free step control 0.019ppm *9 Inconel hr %RH AC V AC Adapter included AC VPlug:Type C SDJ-14 L517 W25 H260mm 9.0kg 500mA High Voltage DC Corona Discharge AC90V 128V DC 6.5KV 3.3m 3 min. 1 Sec. *5 with in 30V *6 Available 3 steps control 0.05ppm *10 Stainless steel hr %RH Plug:Type A SDJ-14 EU L517 W225 D260mm 10.5kg 210mA High Voltage DC Corona Discharge AC200V 240V DC 6.5KV 3.3m 3 min. 1 Sec. *5 with in 30V *6 Available 3 steps control 0.05ppm *10 Stainless steel hr %RH Plug:Type C *9 : 1.5mL/min, measured at 300mm in the front of unit at maximum air flow. *10 : measured at 50mm in the front of unit at maximum air flow

24 Product Lineup ION Parts Cleaner Photo Model code Dimensions Weight Input voltage Power Output Consumption Current Dust Collection Method Air Flow Static Pressure Wind Pressure Dust Collection Capacity Air Pressure Air Consumption Working Temperature Range Working Humidity Range Noise IPC20-E W345 H669 D350mm 21kg Single-phase AC230V 50 60Hz 0.05KW 0.42A 50Hz, 0.4A 60Hz Cylindrical Cartridge Filter 1.6m 3 min. 50Hz2.0m 3 min. 60Hz 0.35kPa 50Hz0.5kPa 60Hz 0.8m sec 50Hz1.0m sec 60Hz 0.5L MPa 315r/min. 0.7MPa, actual measurement %RH 56dB A50Hz58dB A60Hz IPC40-E Hood : W518 H402 D462mm Dust Collector : W481 H416 D354mm Hood : 12kg Dust Collector : 30kg Single-phase AC230V 50 60Hz 0.2KW 1.4A 50Hz, 1.2A 60Hz Cylindrical Cartridge Filter 3.3m 3 min. 50Hz40m 3 min. 60Hz 0.88kPa 50Hz1.23kPa 60Hz 0.4m sec 50Hz0.5m sec 60Hz 1.2L MPa 315r/min. 0.7MPa, actual measurement %RH Hood : 63dB A50Hz66dB A60Hz Dust Collector : 62dB A50Hz65dB A60Hz CHARGE PLATE MONITOR TESTER Decay Time DATA tester corresponding to EOS ESD S3.1 Measured with TREK Model mm 20PF Dampening time from 1,000V to 100 V. Ion Balance DATA tester corresponding to EOS ESD S3.1 Measured with TREK Model mm 20PF

25 Product Lineup Ion generation method Positive ions can be generated from separate wires using "DC" or they can be alternately generated from a single wire using "AC". DC type AC (High frequency transformer) type AC (High frequency voltage transformer) type amplitude(20khz) amplitude(70khz) and are produced from separate wires, therefore bonding does not readily occur. SDJ-14 Fan SDJ-14 EU Fan Compared to low frequency types, a high frequency type exhibits less ion loss by collision. SDJ-02R Compressed air straight nozzle SDJ-03R Compressed air flared nozzle SDJ-06R Compressed air gun type With a high frequency voltage transformer type, ions are continuously generated, therefore few ions are lost to collision. SDJ-08S Mini-Fan SDJ-09 Fan Selection criteria table Type of static eraser Ion stability Ion balance control Static erasing rate Compactness Frequency of maintenance Noise generation DC type AC type High frequency AC type DC type... Exhibits high static erasing performance even at long distances. Generates little noise and ozone. Must worry about unbalancing. AC type... A high frequency AC type generates many ions, therefore static erasing capacity does not decrease even at long distances. Balance does not destabilize. Must worry about noise and ozone.