PCB - yog dab tsi? Properties thiab cov yam ntxwv.

Cov PCB yog hu ua tus ntau yam ntawm laminated yas, tam fabrics. Thermosetting hluavtaws resins pab raws li losis tswvyim dabtsi caij. Thiab nws tsis yog li ntawd ib qho tseem ceeb, yog dab tsi yog suav tias yog PCB. Yuav ua li cas yog nws, zoo nkauj yooj yim rau to taub txawm yog los ntawm qhov kev piav qhia

Ib txhia tsis thiab cov khoom

Nyob ntawm seb dab tsi xwm muaj ib tug fiber textolites faib ua ob peb pab pawg.

1. Bazaltotekstolity rau lub hauv paus ntawm basalt fibers.
2. Uglerodotekstolity carbon.
3. Asbotekstolitov nrog asbestos fibers.
4. Fiberglass ntawm cov iav fibers ntawm ntau hom.
5. Organotekstolity ntawm cov khoom cua thiab hluavtaws fibers.
6. Ua tau textolites fibers yog paj rwb

Nws muaj lwm yam ntau ntau yam. Twill, satin, tiaj - weave hom, uas txawv nyob rau hauv lub filaments lawv tus kheej. Tej zaum yuav sib txawv nto ceev, thickness, tus naj npawb ntawm filaments ib chav tsev ntev nyob rau hauv lub warp kev taw qhia thiab Weft ntaub, qauv thiab thickness ntawm lub xov los yog cab. Muaj yog ib tug tshwj xeeb technology uas ua PCB. Yuav ua li cas yog nws, peb tau twb pom.

Yog hais tias lub interlayer zog yuav tsum tau tshwj xeeb yog high, thov multilayer hom ntaub. Tej zaum kuj muaj khoom qhov twg lub fibers no yog ua los ntawm ob peb hom ntaub ntawv.

Ntxiv rau hais tias daim ntawv?

Yog kuj tseem ceeb raug technology, tus nqi thiab thaj chaw ntawm lub phau ntawv, tus yam ntxwv ntawm cov ntaub, qhov xwm ntawm tus fibers - cov tsis txiav txim li cas qualities yuav muaj lub PCB nws tus kheej. Raws li rau lub ntau lawm, nws ua hauj lwm pab lub hauv paus rau layering los yog winding zaub ntawm cov ntaub so ntswg thaum nyob rau hauv daim ntawv khoom mandrel thov phau ntawv. Ntawv Nyiaj PCB yog ua nyob rau hauv tib txoj kev. Ntxiv muaj yog ib tug molding. Tsis tas li ntawd, textolite phiaj, slabs los yog los xij yuav tsum yauv mus ua machining.

Ntau nyob rau hauv muaj pes tsawg leeg tej zaum yuav tsis tau tsuas yog cov ntaub, tiam sis kuj lub txuas ntsiab, uas ua si ib lub luag hauj lwm rau lub impregnation ntawm lub muab tub lim. Thermosetting hluavtaws resins feem ntau txaus siab no luag hauj lwm, ntawv ci PCB - yog tsis muaj exception.

Nyob rau txoj hauj lwm zoo, thiab lwm yam tsis

Muaj ib tug xov tooj ntawm qualities ntawm tej khoom raws li ib tug PCB. Hais tias nws yog ib qho yooj yim to taub los ntawm kev piav ntawm nws tus yam ntxwv.

1. Kev khiav hauj lwm ntau yam kub - -40 rau 105 degrees, yog hais tias tus tam sim no zaus ntawm txog 50 Hz, yog muab khaws cia tseg tug txheeb ze humidity.
2. PCB - zoo insulator, yog li ntawd nws yuav ib tug indispensable cuab tam nyob rau hauv lub hwj chim thiab lub zog kev lag luam.
3. Tejzaum ntawm machining.
4. High zog.
5. Tsis tshua muaj ceev.
6. Ib tug tsis tshua muaj coefficient ntawm tsis sib haum xeeb.

cov lus qhia ntxiv

Textolite los xij siv nyob rau hauv ntau spheres ntawm lub neej. Nws yuav ua tau yam ntxwv, antifriction, kev sib txhuam, hluav taws xob, thiab hluav taws xob insulating cov ntaub ntawv uas.

Nyob rau hauv ntau txoj kev, qhov no muaj txhawb rau cov muaj peev xwm mus tau yooj yim hloov tus neeg kho tshuab loads, txawm heev loj. Yog li ntawd nws yog tshwj xeeb yog thoob plaws siv yog nws nyob rau hauv qhov hluav taws xob engineering kev lag luam. Nyob rau lub hauv paus ntawm lub PCB no yog ua los nrog ntau qhov chaw rau constructional hom phiaj.

Daim ntawv sau npe thiab qheb tshiab

Zus tau tej cov rings, zawv zawg bearings, bushings siv ornamental PCB. Yuav ua li cas nws yog nws yuav tsum to taub txawm tsis muaj tshwj xeeb dictionaries. Cov kev luv nqi ntawm panels thiab ib daim hlab kuj yuav pom muaj qhov no cov ntaub ntawv uas.

Nyob rau hauv cov kis, rau cov ceevxwm mechanisms txawv xyaw, Gearboxes feem ntau markedly muaj conical thiab cylindrical iav raws li nyob rau hauv ib cov ntaub ntawv xws li ib tug PCB. Tus nqi sib txawv. Hais ntawm centrifugal twj, pob mills, turbines yog cov textolite bearings. PCB yuav ntse hloov getinaks raws li ib tug cov ntaub ntawv uas rau zus tau tej cov hluav taws xob qhov chaw. Thaj Chaw rau PCBs ntawm PCB ua nyob rau hauv electronics. Nyob rau hauv tas li ntawd, nyob rau hauv hnub no tus cov kev sib tw nws yog PCB ua lub hauv paus rau zus tau tej cov riam phom - yog nws daim ntawv thov heev unexpectedly.

Ib me ntsis txog qib

Muaj ib tug ntau yam ntawm PCB, uas yog hu ua asboplastikom thiab zoo tu qab tso nyias. Qhov no nplaim taws-resistant thiab check cov ntaub ntawv uas muaj peev xwm mas tshav kub txog li 250 degrees. Tsiag ntawv tshuaj lom neeg kuj, hluav taws xob insulating zog thiab corrosion. Hom ntawm phau ntawv thiab muab tub lim lom zem ntau thiab txiav txim seb dab tsi nws yuav muaj cov yam ntxwv ntawm ib tug khoom. Piv txwv li, siab acid kuj ntawm cov ntaub ntawv impart anthophyllite asbestos. manufacture thiab cov neeg kawm ntawv ntawm sau txoj kev yuav kuj pheev lawv cawv rau cov uas twb muaj lawm tsis. Nyob rau hauv txhua rooj plaub, txhua yam yog txiav txim tau ib lub zuj zus, tom qab no khiav nyias.