Taw qhia
Cov khoom siv roj hmab thiab elastomer tau dav siv thoob plaws hauv kev lag luam sealing, vibration damping, tsheb thauj mus los, mining, kev tsim kho thiab cov khoom siv kho tshuab. Thaum engineers, procurement managers thiab project specifiers xaiv cov kev cai roj hmab Cheebtsam, Shore A hardness yuav luag ib txwm teev raws li ib tug ntawm cov tseem ceeb kev tsis.
Txawm li cas los xij, ntau tus neeg yuav khoom tseem muaj kev nkag siab tsis zoo txog qhov ntsuas no. Qee qhov tsuas yog tsom mus rau tus nqi hardness thaum tsis quav ntsej nws qhov kev sim txwv, thiab lwm tus tsis tuaj yeem txiav txim siab seb cov khoom siv roj hmab nrog qee qib Shore A sib phim lawv cov kev ua haujlwm. Cov lus qhia dav dav no yuav piav qhia txog Shore A hardness los ntawm kev txhais, kev sim cov hauv paus ntsiab lus, kev faib tawm, kev cuam tshuam, kev taw qhia txog kev xaiv thiab cov kev xav tsis zoo, pab koj txiav txim siab zoo dua thaum muab cov khoom siv roj hmab.
Shore A Hardness yog dab tsi?
Shore A hardness yog tus qauv ntsuas qhov ntsuas qhov hnyav tsim tshwj xeeb rau cov elastomers hloov tau, suav nrog cov roj hmab ntuj, nitrile roj hmab (NBR), EPDM, silicone, neoprene thiab lwm yam khoom muag muag semi{0}} roj hmab. Nws tau tsim los ntawm Albert Shore thiab ntsuas los ntawm Shore A durometer.
Lub hauv paus ntsiab lus ntawm kev ntsuam xyuas yog yooj yim: nyob rau hauv cov txheej txheem ntawm chav tsev kub, lub durometer lub indenter nias rau hauv cov qauv roj hmab nyob rau hauv lub caij nplooj ntoos hlav ruaj khov. Kev nyeem ntawv qhia txog cov khoom tiv thaiv rau qhov chaw indentation.
Tus ntug dej hiav txwv A yog li ntawm 0 txog 100.
- Lower Shore A tus nqi: roj hmab softer, yooj yim rau deform, siab yooj
- Higher Shore A tus nqi: tawv roj hmab, tsis tshua muaj elastic deformation, muaj zog txhawb nqa
Cov lus ceeb toom tseem ceeb: Shore A yog haum rau cov mos mus rau nruab nrab - tawv elastomers. Rau cov roj hmab tawv tawv los yog cov yas tawv tawv, koj yuav tsum siv cov nplai Shore D hloov. Koj tsis tuaj yeem sib piv Shore A thiab Shore D qhov tseem ceeb ncaj qha.
Shore A Hardness Qib thiab Cov Ntawv Thov Kev Lag Luam
| Shore A Range | Khoom yam ntxwv | Cov ntawv thov kev lag luam |
|---|---|---|
| 20A – 40A | Ultra{0}} mos, siab elasticity, tsis tshua muaj compression kuj, zoo heev poob siab absorbing | Mos buffer pads, hloov tau lub tes tsho tiv thaiv, ultra- mos sealing strips, soft contact cushions |
| 40A – 60A | Nruab nrab mos, sib npaug elasticity thiab hnav tsis kam, compression yooj yim | General gaskets, roj hmab hoses, lub teeb -load vibration isolators, yoog raws plua plav seals |
| 60A – 80A | Nruab nrab nyuaj, zoo abrasion kuj, zoo compression stability, dav siv | O-rings, roj hmab chais, khoom mounting pads, sealing washers, nws pib roj hmab spare qhov chaw |
| 80A – 95A | Cov roj hmab tawv, tsis tshua muaj elasticity, muaj zog load-cov kabmob muaj peev xwm, tsis yooj yim rau compress | Hnav-cov roj hmab tiv taus, cov pob txha nruj, hnyav- cov roj hmab thaiv, tiv thaiv- cov paib cuam tshuam |
Lub ntsiab tseem ceeb uas txiav txim siab Rubber Shore A Hardness
1. Base Roj Hmab Polymer
Ntau hom roj hmab sib txawv tuaj nrog qhov sib txawv ntawm qhov sib txawv hardness. Ntuj roj hmab (NR) muaj zoo elasticity ntawm nruab nrab hardness; NBR tuav ruaj khov hardness nyob rau hauv ib puag ncig roj; EPDM ua kom yoog raws li huab cua sab nraum zoov; silicone roj hmab tuaj yeem tuav softness nyob rau hauv siab thiab qis kub.
2. Filler thiab Reinforcement Additives
Cov pa roj carbon dub, calcium carbonate thiab lwm cov ntxhia ua pob zeb yog feem ntau ntxiv rau hauv cov qauv roj hmab. Qhov ntxiv cov khoom ntxiv ntxiv, qhov siab dua qhov kawg Shore A hardness. Fillers kuj hloov lub zog tensile thiab hnav kev ua haujlwm ib txhij.
3. Vulcanization Formula thiab Curing txheej txheem
Vulcanization hla- txuas cov roj hmab molecular chains. Tsis txaus vulcanization ua rau mos, nplaum roj hmab. Tshaj -vulcanization yuav ua rau cov roj hmab hnyav dua thiab nkig, txo qhov elongation thaum tawg. Kev tswj xyuas qhov kub thiab lub sijhawm yog qhov tseem ceeb rau ntaus lub hom phiaj Shore A.
4. Ambient Kub
Kub hloov pauv cuam tshuam qhov ntsuas hardness. Roj hmab ua softer thaum rhuab, thiab nyuaj thiab stiffer nyob rau hauv qhov chaw txias. Thaum kuaj Shore A, cov qauv yuav tsum tau khaws cia ntawm chav tsev kub. Tsis tas li, koj yuav tsum xav txog qhov kub thiab txias ntawm koj qhov chaw ua haujlwm tiag tiag thaum xaiv cov khoom.
Yuav ua li cas Shore A Hardness cuam tshuam rau Rubber Part Performance
Sealing Performance
Rau feem ntau static sealing daim ntaub ntawv, roj hmab ntawm 50A thiab 70A yog qhov kev xaiv. Cov roj hmab muag heev tuaj yeem tsim cov compression tas li tom qab ntev -lub sij hawm siab thiab poob sealing nyhuv. Cov roj hmab tawv heev tsis tuaj yeem compress txaus los ua qhov khoob, ua rau muaj kev phom sij. Dynamic seals xav tau kev xav txog kev sib txhuam ntxiv dua li hardness.
Abrasion Resistance
Hardness muaj kev sib raug zoo nrog hnav lub neej. Cov roj hmab muag ntau dhau deforms hnyav heev hauv kev sib txhuam thiab hnav sai sai. Cov roj hmab tawv heev tuaj yeem tawg raws li kev cuam tshuam rov qab. Peb yuav tsum xaiv qhov sib npaug hardness raws li kev sib txhuam load thiab kev sib cuag siab.
Vibration Isolation & Load Bearing
Softer roj hmab absorbs kev co zoo dua tab sis tsim loj deflection, tsuas yog haum rau lub teeb load. Cov roj hmab tawv txhawb nqa hnyav zoo li qub nrog me me deformation, tab sis nws cov nyhuv vibration absorption poob qis. Anti-vibration mount tsim yuav tsum phim Shore A nrog load hnyav thiab vibration zaus.
Tear Resistance
Cov roj hmab muag muag heev nyiam tsim kua muag tau yooj yim hauv qab cov npoo ntse. Tshaj - cov roj hmab tawv tawv ua nkig thiab tuaj yeem tawg thaum muaj kev cuam tshuam tam sim ntawd. Lub qhov rais hardness haum yog nyob ntawm seb puas muaj shear quab yuam los yog kev sib cuag ntse hauv kev pabcuam.
Common FAQ Hais txog Shore A Hardness
Q: Ob yam khoom siv roj hmab nrog tus nqi Shore A zoo ib yam, lawv cov khoom puas zoo ib yam?
A: Tsis muaj tseeb. Shore A tsuas yog ntsuas qhov tawv indentation hardness. Ob lub roj hmab ntawm 60A tuaj yeem siv cov hauv paus sib txawv. Ib qho tuaj yeem yog roj- tiv taus NBR thaum lwm tus yog dej- tiv taus EPDM. Lawv lub zog tensile, kev laus ua haujlwm, tshuaj tiv thaiv thiab kev pabcuam lub neej yuav txawv kiag li. Hardness tsuas yog ib qho parameter, tsis yog tag nrho cov khoom specification.
Q: Cov qauv thickness puas cuam tshuam rau Shore A xeem?
A: Yog. Tus qauv xeem yuav tsum tau cov qauv roj hmab thickness Ntau dua los yog sib npaug li 6 hli. Cov qauv nyias nyias tsis tuaj yeem txhawb nqa lub indenter kom zoo thiab yuav qhia qis dua, tsis raug qhov kev nyeem ntawv nyuaj. Ntau cov khaubncaws sab nraud povtseg ua ke tsis pom zoo rau kev sim, vim qhov sib txawv ntawm cov khaubncaws sab nraud povtseg tau tshwm sim.
Q: Kuv puas tuaj yeem kuaj cov roj hmab nyias nyias ncaj qha?
A: Yog tias cov khoom tiav thickness tsawg dua li tus qauv yuav tsum tau, qhov kev nyeem ntawv tsuas yog siv rau kev siv, thiab tsis tuaj yeem kho raws li cov ntaub ntawv raug cai. Koj yuav tsum tau sim cov qauv molded qauv plaques los ntawm tib lub roj hmab batch.
Cov lus qhia tseem ceeb thaum qhia txog roj hmab Hardness rau kev yuav khoom
- Sau npe Shore A ua ke nrog cov khoom siv roj hmab (NBR / EPDM / NR / Silicone thiab lwm yam)
- Lub xeev ua haujlwm nruab nrab: roj, dej, kua qaub, alkali lossis ozone raug
- Kos lub sijhawm ua haujlwm kub thiab sijhawm ua haujlwm tas mus li
- Qhia qhov zoo li qub lossis dynamic load, siab thiab kev sib txhuam
- Ntxiv kev kam rau siab: kev ua siab ntev ntev yog ± 5 Ntug A rau cov khoom siv roj hmab
Xaus
Shore A hardness yog ib qho tseem ceeb thiab dav siv los qhia hauv kev lag luam roj hmab. Nws pab engineers sai txo qis cov khoom siv, tab sis nws tsis tuaj yeem ua haujlwm ib leeg. Thaum muas cov khoom siv roj hmab kev cai, koj yuav tsum sib txuas hardness nrog roj hmab polymer hom, ua hauj lwm nruab nrab, kub, load thiab kev pab cuam lub neej.
Peb lub Hoobkas muab cov khoom siv roj hmab kev cai nrog cov Shore A tswj kom meej rau cov neeg siv khoom thoob ntiaj teb. Yog tias koj muaj lus nug txog cov roj hmab hardness lossis xav tau cov khoom siv roj hmab kev cai nrog lub hom phiaj Shore A hardness, thov hu rau peb pab neeg ua haujlwm rau kev pom zoo, qauv kev txhawb nqa thiab cov lus hais.
