Ib qho ntawm cov lus nug tseem ceeb tshaj plaws uas cov neeg ua haujlwm ntsib tom qab txhim kho lub tshuab txiv hmab txiv ntoo yog yuav ua li cas kho qhov ntom ntom ntawm lub tshuab txiv hmab txiv ntoo tsis hloov tag nrho cov khoom tuag. Mesh ntom-feem ntau qhia raws li qhov ib cm² lossis mesh suav (10–40 mesh ntawm tus qauv EPE/LDPE units)- tsis yog kho los ntawm lub tshuab ib leeg. Nws yog qhov tshwm sim los ntawm ob peb qhov sib txawv ntawm cov txheej txheem sib txawv: lub haul- tawm (siv- nce) nrawm piv rau cov khoom siv extruder, qhov tuag mandrel slit suav, thiab qhov sib piv foaming. Mastering peb qhov no cia ib lub tshuab ua kua txiv hmab txiv ntoo ua haujlwm citrus, txiv apples, pears, thiab txawm tias lub tes tsho txiv tsawb.
1. Haul-Off Speed vs Screw RPM (Primary Lever)
Txoj kev ceev tshaj plaws los kho qhov ceev ntawm lub tshuab ua kua txiv hmab txiv ntoo yog qhov sib piv ceev ntawm cov ntsia hlau thiab lub rub tawm. Lub taub hau tuag extrudes ib tug tubular net nrog tus naj npawb ntawm longitudinal tav (4, 6, los yog 8, teem los ntawm mandrel), yog li lub pob zeb diamond qhib loj yog tswj los ntawm qhov deb npaum li cas cov qauv yog stretched.
Nce nqa- tawm ceev thaum ntsia hlau RPM nyob tas li → net yog rub ntev dua → pob zeb diamond qhib kom loj → qis dua, qhib mesh ntau dua.
Txo qis dua - tawm ceev ntawm tib qhov tso zis extrusion → mesh compresses → opens shrink → ntau dua ntom ntom ntom ntom ntom ntom.
Nyob rau niaj hnub VFD-tsav txiv hmab txiv ntoo net tshuab kab, lub haul- tawm inverter yog lub vaj huam sib luag txhua hnub rau qhov no. Hloov nws hauv 1-3% cov kauj ruam, cia cov kab ruaj khov 5-10 feeb, tom qab ntawd ntsuas qhov qhib qhov loj nrog lub caliper tiv thaiv cov qauv pom zoo.
2. Tuag Mandrel thiab Strand suav (geometry txwv)
Lub cev tuag txiav txim siab muaj pes tsawg tus tav. Swapping lub puab mandrel los yog lub nplhaib tuag txheej hloov strand suav los ntawm 4 mus rau 6 los yog 8, ua rau lub mesh visually finer txawm nyob rau tib lub sij hawm coj -up ratio. Feem ntau cov txiv hmab txiv ntoo net setups khaws 2-3 mandrel teeb ntawm lub txee: ib qho rau cov txiv hmab txiv ntoo zoo (16-20 qhov / cm²), ib qho rau cov txiv apple / citrus (8-12 qhov / cm²), ib qho rau cov txiv hmab txiv ntoo qhuav (6-10 qhov / cm²). Routine ceev tweaks nyob ntawm VFD; cov khoom loj hloov pauv lub mandrel.
3. Foaming Ratio thiab Additives (EPE nkaus xwb)
Rau EPE txiv hmab txiv ntoo net tshuab, butane txhaj tus nqi thiab talc / masterbatch dosing hloov strand thickness. Ntau lub tshuab tshuab → thicker, softer strands → visually tighter mesh ntawm tib lub qhov suav. Tsawg foaming tus neeg sawv cev → thinner strands → qhib ntau dua. Screw ceev kuj plays nyob rau hauv: 5-50 rpm ntau ntawm Φ75 mm tshuab, qhov siab dua rpm nrog taag puller tsa cov zis ib qhov ntev thiab zawm lub vas yog haul - tawm yog tsis tsa nyob rau hauv sync.
4. Kauj Ruam -los ntawm - Kauj Ruam Kev Kho Kom Zoo
Xauv ntsia hlau RPM thiab tuag kub ua ntej (thaj tsam thaj tsam hauv ± 2 degree).
Xaiv qhov tseeb mandrel rau lub hom phiaj txiv hmab txiv ntoo.
Teem caij -tawm Hz mus rau lub hauv paus ntawm daim ntawv qhia (sau los ntawm kev khiav zoo kawg).
Khiav 3-5 feeb, txiav ib lub tes tsho 10 cm, pw tiaj tus, suav qhov / cm².
Yog qhib dhau lawm → poob haul-tawm Hz 2%; yog nruj → nce 2%.
Re- xyuas lub raj txoj kab uas hla ntawm lub tes tsho sizing; txoj kab uas hla thiab qhov ceev txav mus ua ke, zoo heev -tune ob leeg.
Log kawg ntsia hlau rpm, thauj - tawm Hz, butane siab, tuag temp, thiab mesh suav rau repeatability.
Feem ntau yuam kev
Kho lub laub- tawm yam tsis tau kov cov ntsia hlau ceev thiab ua rau txoj kab uas hla tsis dhau, tsis yog hloov qhov ceev xwb.
Tshaj -nce butane kom "kaw" cov mesh ua rau npuas tawg thiab tsis sib xws.
Tsis quav ntsej mandrel hnav- hnav 6-rib mandrel nws thiaj li luam tawm zoo li 5-rib, ntsiag to coarsening lub vas.
Hauv luv luv, los kho mesh ceev ntawm lub tshuab txiv hmab txiv ntoo, kho lub haul -off/ntsia hlau piv li koj niaj hnub knob, mandrel swap raws li koj cov khoom-hloov pob qhov rooj, thiab foaming ratio raws li koj zoo -tune knob. Nrog cov ntawv qhia zaub mov nkag rau qib txiv hmab txiv ntoo, ib lub tshuab ua kua txiv hmab txiv ntoo tuaj yeem npog 10-40 mesh ntau yam thoob plaws ib lub vaj txiv hmab txiv ntoo raws caij nyoog yam tsis muaj kev poob siab.