Indlela yokukhetha ijubane lokuhambisa i-UV LED Curing (ifomula neshadi)

Ezweni elisheshayo lokukhiqiza, ibhande lokuhambisa liyi-pacemaker yakho. Yigijime ngokushesha okukhulu, futhi ukumbozwa kwakho kwe-UV kuhlala ku-tacky noma kumanzi. Yigijime kancane kakhulu, futhi ubeka engcupheni ukulimala okushisayo kuma-substrates abucayi noma udale i-bottleneck yokukhiqiza ebizayo.

E-UVET, sichithe iminyaka engaphezu kwengu-15 sithuthukisa izinhlelo ze-UV LED zezimboni ze-elekthronikhi, izimoto kanye nezimboni zokuphrinta emazweni angama-60. Siyazi ukuthi "ukuqagela" ijubane lokudayela kuyindlela yokwehluleka. Noma ngabe uphulukisa ukumbozwa okuhambisanayo kuma-PCB noma izingqimba zokuzivikela ezikhanyisweni zezimoto, ukunemba ukuphela kwendlela yokuqinisekisa ukwelashwa.

Lo mhlahlandlela unikeza amafomula wezibalo, izivumelwano zokuhlola eziphilayo, nezinyathelo zokuxazulula izinkinga onjiniyela bethu abasebenzisa ukubala isivinini esiphelele sokuhambisa kunoma yiluphi uhlelo lokusebenza lwe-UV LED.

The "Golden Formula" for UV Conveyor Speed

Ukubala isivinini esiphezulu sokuhambisa, sebenzisa ifomula: Isivinini = (Isilinganiso se-Irradiance × Exposure Window Width) / Umthamo odingekayo. Okokuqala, khomba i-Energy Density ehlosiwe (Umthamo ku-$J / cm ^ 2 $) kusuka ku-datasheet yezobuchwepheshe yezinto zakho. Okulandelayo, linganisa ukukhanya kwesibani sakho se-UV ($W / cm ^ 2 $). Okokugcina, hlukanisa amandla aphelele ngomthamo odingekayo ukuze unqume isivinini esihle sebhande.

The Math Behind the Magic

Abaqhubi abaningi bacabanga ukuthi uma bephinda kabili amandla esibani, bangaphinda kabili ijubane lebhande. Nakuba ngokuvamile kuyiqiniso, lobu budlelwano bomugqa buphuka ezweni langempela. Ukuze wenze lokhu, udinga ukuqonda izici ezihlukahlukene:

$$Speed (V) = \frac{Irradiance (I) \times width (W)}{dose (D)}$$

• $I $ = Ukukhanya okujwayelekile ($W / cm ^ 2 $): Ukuqina kwamandla e-UV ashaya ubuso. Qaphela: Lokhu kwehla kakhulu uma isibani siphakanyiswa phezulu.
• $W$ = Ububanzi be-UV LED Emitting Window (cm): Ubude bomzimba be-LED array ohlangothini lokuhamba (isb., Iwindi elibanzi le-20mm noma i-30mm).
• $D $ = Umthamo ohlosiwe ($J / cm ^ 2 $): Amandla aphelele adingekayo ukwenza i-polymerize ngokugcwele inki noma ukunamathela.

Ithiphu ye-Pro evela ku-UVET Engineers: Buka amayunithi akho! Amashidi wedatha avame ukufaka uhlu lwe-Dose kuma-millijoules ($mJ / cm ^ 2 $), kuyilapho ukubala kwakho kungasebenzisa ama-Watts ($W $). Njalo guqula iyunithi efanayo (1 $W $ = 1000 $mW$) ngaphambi kokuhlukanisa. Sibonile ukugijima okuphelele kokukhiqizwa kwehluleka ngenxa yephuzu ledesimali elingalungile.

Kungani "i-Peak Irradiance" ibaluleke kakhulu kunejubane

Kubalulekile ukuqonda ukuthi ukunciphisa i-conveyor kwandisa umthamo we-UV (amandla aphelele), kepha akukhuphuli i-Peak Irradiance (amandla okungena).

Uma uphulukisa inkinobho yesikrini esijiyile, esinemibala emikhulu, ukumane unciphise ibhande kungahle kungasebenzi. Amandla e-UV adinga ukuqina okuphezulu (i-Peak Irradiance) ukushaya ungqimba oluphansi. Uma isibani sakho sibuthakathaka kakhulu (i-$W / cm ephansi ^ 2 $), asikho isikhathi sokuhlala esizophulukisa isisekelo. Kulezi zimo, awudingi ibhande elihamba kancane—udinga ikhanda le-UV LED elinamandla aphezulu noma ibanga lokusebenza eliseduze.

Isinyathelo ngesinyathelo - Tuning Your Conveyor Speed

Ukuze uthuthukise ijubane lakho lokuhambisa, yenza i- "Ladder Study." Qala ngokuphulukisa isampula ye-static ukuthola isikhathi esincane sokuvezwa esidingekayo ebusweni obungena-tack. Ngemuva kwalokho, gijima ibhande ngesivinini esibalwe bese ukhuphula ijubane ngo-10% ekugijimeni okulandelayo kuze kube yilapho ukwelashwa kwehluleka. Setha isivinini sakho sokugcina sokukhiqiza ku-80% yephuzu lokwehluleka ukuze ubheke ukuhlukahluka kwenqubo.

Isinyathelo 1: Isivivinyo se- "Static Cure"

Ngaphambi kokuvula ibhande, beka isampula ngaphansi kwekhanda le-UV LED. Sebenzisa i-timer ukuyiveza imizuzwana engu-0.5, bese kuthi imizuzwana engu-1.0, bese kuthi imizuzwana engu-1.5. Hlola i-tackiness ebusweni nokunamathela. Lokhu kukunikeza isisekelo esinzima "sesikhathi esincane".

Isinyathelo 2: I-"Ladder Study" (The Industry Standard)

E-UVET, asilokothi sithembele ekuhlolweni okukodwa. Siqhuba "isifundo sesitebhisi" ukuthola iwindi lokusebenza. Nasi isibonelo sokuthi leyo datha ibukeka kanjani ngesicelo esijwayelekile sokunamathisela se-UV:

Kulesi sibonelo, "iphuzu lokwehluleka" liyi-20 m / min. Iwindi lenqubo liphakathi kuka-10-15 m / min.

Isinyathelo 3: Ukulungisa i- "Dosage Drop"

Ngokuhlangenwe nakho kwethu, akufanele ugijime ngesivinini esiphezulu ngokuphelele (19 m / min esibonelweni esingenhla). Izimo zomhlaba wangempela zinciphisa ukukhishwa kwe-UV ngokuhamba kwesikhathi:

• Uthuli nomhwamuko kuhlala efasiteleni le-quartz.
• Ukuphakama kwe-substrate kuyahlukahluka, kushintsha iphuzu lokugxila.
• Ama-arrays e-LED anganciphisa kancane ngaphezu kwezinkulungwane zamahora (yize izinhlelo ze-UVET zilinganiselwa amahora angama-20,000 +).

Iseluleko sethu: Sebenzisa umkhawulo wokuphepha ongu-20%. Uma ukwelashwa kwehluleka ku-20 m / min, sebenzisa umugqa wakho wokukhiqiza ku-16 m / min.

Ukuxazulula Amaphutha Ahlobene Nesivinini

Amaphutha ajwayelekile okuphulukisa i-UV afana nezindawo ezinamathelayo noma imibimbi ngokuvamile kuyimiphumela eqondile yejubane lokuhambisa elingalungile. Indawo enamathelayo (i-Oxygen Inhibition) imvamisa idinga ukwehlisa ijubane ukukhulisa umthamo we-UVC / amagagasi amafushane, kuyilapho indawo enemibimbi ("i-orange peel") ikhombisa ukuthi indawo iphulukisa ngokushesha kakhulu uma kuqhathaniswa nomzimba, idinga ijubane lebhande elisheshayo noma ukuqina okuphansi.

Uma ubona izinkinga zekhwalithi, hlola lolu hlu ngaphambi kokubiza isevisi:

• I-Sticky Surface (Oxygen Inhibition):
  • Isizathu: I-oksijini emoyeni ivimbela ukwelashwa kwesendlalelo esiphezulu kakhulu.
  • Ulungisa: Nciphisa ijubane. Ukwandisa isikhathi sokuhlala kuvumela amandla amaningi ukunqoba isithiyo se-oksijini. Ngenye indlela, ukwandisa i-nitrogen inerting uma ikhona.
• I-Wrinkled Surface:
  • Isizathu: "Isikhumba" sesembozo saphulukisa ngokushesha, kepha uketshezi olungezansi lwanyakaza, okwenza isikhumba sigoqeke.
  • Kulungisa: Sheshisa. Udinga ukulinganisa izinga lokwelashwa. Kwesinye isikhathi, ukwehlisa ukuqina kwesibani (ukufiphala) nokugijima kancane kusiza ukulinganisa ukwelashwa.
• Ingxenye ye-Warping / Deformation:
  • Isizathu: Ukushisa ngokweqile e-substrate.
  • Kulungisa: Sheshisa. Hambisa ingxenye ngokusebenzisa "indawo eshisayo" ngokushesha. Uma lokho kuphazamisa ukwelashwa, kungadingeka ukuthi ushintshele ohlelweni lwe-UV LED olupholile ngamanzi ukuphatha ukukhishwa okushisayo kangcono.
• "Striping" noma Ukwelashwa Okungalingani:
  • Isizathu: I-conveyor ihamba ngokushesha kakhulu ngegebe elithile phakathi kwama-chips e-LED, noma isibani sisondele kakhulu ku-substrate.
  • Ukulungisa: Lungisa ukuphakama ukuvumela ukukhanya ukuba kuhlangabe, noma kancane kancane i-conveyor ukuqinisekisa ukumbozwa okufanayo.

Ukuze uthole okwengeziwe ngokucushwa kwesistimu, funda umhlahlandlela wethu ku UV LED Curing Systems for Powder Coating.

Common Conveyor Speed vs. Material Reference Chart

Isivinini sokuhambisa siyahlukahluka kakhulu ngesicelo. Izinqubo ze-inkjet zedijithali zivame ukugijima ngokushesha (20-50 m / min) ngenxa yezingqimba ezincane nokusebenza okuphezulu, kuyilapho ukuphrinta kwesikrini kudinga isivinini esihamba kancane (10-20 m / min) yokungena okujulile kokwelashwa. Ukumbozwa okuhleliwe kanye nezicelo ze-potting zigijima kancane kancane (0.5-1.5 m / min) ukuqinisekisa ukwelashwa okujulile okugcwele ngaphandle kwamabhamuza.

Sebenzisa lezi zigaba njengesiqalo, kepha ngaso sonke isikhathi uqinisekise nomhlinzeki wakho weyinki:

Ukuze uthole iseluleko esithile ngezicelo zokumboza, vakashela yethu UV LED Curing for Coatings ikhasi.

Ukulinganisa impumelelo: Ungaqageli, sebenzisa i-Radiometer

Asikwazi ukugcizelela lokhu ngokwanele: inombolo ekudayela kwakho okuhambisayo akuyona isilinganiso samandla e-UV.

I-generic "Speed Setting 5" ayisho lutho uma imoto yebhande ihamba noma isilinganiso segiya sishintsha. Ukuqinisekisa ikhwalithi, ikakhulukazi kubakhiqizi abaqinisekisiwe be-ISO (njengesikhungo sethu se-ISO 9001), kufanele usebenzise i-UV Radiometer ukukala i-$J / cm ^ 2 $ yangempela efinyelela ibhande. Lokhu kuqinisekisa ukuthi ijubane lakho elibaliwe empeleni liletha umthamo owulindele.

Imibuzo Evame Ukubuzwa

Kwenzekani uma ijubane lokuhambisa lishesha kakhulu ukwelashwa kwe-UV?

Uma ijubane lokuhambisa lishesha kakhulu, impahla ithola umthamo we-UV onganele ($J / cm ^ 2 $). Lokhu kuholela esimweni "esingalapheki" lapho ukumbozwa kungazizwa komile ukuthinta kepha kuhluleka ukuhlolwa kokunamathela (ukuhlolwa kwetheyiphu) noma ukuhlolwa kokumelana namakhemikhali. Kungashiya futhi ama-photoinitiators angaphenduli angafuduka kamuva, okuwukwehluleka okubucayi ekuphaketheni ukudla noma izinhlelo zokusebenza zedivayisi yezokwelapha.

Ngingakwazi ukwandisa ukuqina kwe-UV ukugijima i-conveyor ngokushesha?

Yebo, ukwandisa ukuqina kwe-UV (Ukukhanya ku-$W / cm ^ 2 $) kukuvumela ukuthi ugijime i-conveyor ngokushesha ngenkathi ugcina ingqikithi efanayo ye-Energy Dose ($J / cm ^ 2 $). Kodwa-ke, kukhona umkhawulo. Ukuqina ngokweqile kungashisa ama-substrates azwela ukushisa noma kubangele ukukhubazeka komhlaba njengokubimbi. Kufanele uqinisekise ukuthi impahla ingamelana nokukhanya okuphezulu okudingekayo ngesivinini esisheshayo.

Ibanga lithinta kanjani ijubane elidingekayo lokuhambisa?

Njengoba ibanga phakathi kwesibani se-UV LED ne-substrate likhuphuka, i-Irradiance ($W / cm ^ 2 $) iyancipha ngokushesha. Ukunxephezela lokhu kulahleka kokuqina nokugcina umthamo wokwelapha odingekayo, kufanele unciphise ijubane lokuhambisa. Ukugcina ibanga lokusebenza okungaguquguquki (imvamisa i-5mm kuya ku-20mm kuye ngokuthi i-optic) kubalulekile ekugcineni isivinini somugqa siphezulu.

Kungani ukumbozwa kwami kwe-UV kunamathela ngisho nangesivinini esincane?

Uma ukumbozwa kuhlala kunamathela ngisho ngesivinini esincane kakhulu, inkinga kungenzeka ukuthi i-Oxygen Inhibition. I-oksijini emoyeni iphendula ngama-radicals wamahhala ebusweni, imise ukwelashwa. Ukwehlisa ijubane kusiza kancane, kepha izixazululo eziphumelela kakhulu ukwandisa ukuqina kwe-UVC / amagagasi amafushane (uma usebenzisa uhlelo lwe-multi-wavelength), ukwandisa ukuhlushwa kwe-photoinitiator, noma ukusebenzisa ikamelo le-nitrogen inerting ukususa umoya-mpilo.