Txhua feem ntawm lub hnab muaj kev ntxhov siab sib txawv, yog li txoj kev stitching yuav tsum tau kho kom haum. Cov lus qhia no suav nrog peb yam yooj yim plooj siv hauv FIBC kev tsim khoom thiab muab cov lus pom zoo tshwj xeeb rau txhua qhov tseem ceeb.
1. Basic Stitch Hom Siv hauv FIBCs
|
Ntaus hom |
Kev piav qhia |
Yam ntxwv |
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Lockstitch |
Tsim los ntawm interlacing ib rab koob xov thiab ib tug bobbin xov ntawm cov ntaub interface. |
Muaj zog, huv si, thiab resistant rau unraveling; feem ntau siv stitch rau dav seams. |
|
Chainstitch |
Tsim los ntawm ib los yog ntau tshaj threads tsim ib tug looped chain-zoo li qauv. |
Elastic thiab muaj zog nyob rau hauv dynamic loads; muab kev cuam tshuam ntau dua tab sis tuaj yeem tshem tawm yog tias txiav. |
|
Overedge (zeeg) |
Stitches nyob ib ncig ntawm ntug ntug ntawm cov ntaub thaum ib txhij trimming los yog kaw nws. |
Tiv thaiv ntug fraying (txiav) ntawm PP woven ntaub; ntxiv durability thiab huv si. |
2. Cov lus pom zoo-los ntawm-Component Stitch
- 2.1 Lub Hnab Lub Cev (Side Walls)
Pom zoo Stitch: Lockstitch
Qhov laj thawj: Lub cev muaj kev sib txuam zoo li qub los ntawm cov ntsiab lus. Lockstitch muaj kev txhim khu kev qha, zoo sib xws seam lub zog nrog lub tiaj tus, zoo nkauj tsos, ua tau raws li tus qauv thauj khoom.
Cov txheej txheem tseem ceeb Parameter:
Stitch yuav tsum ncaj, tsis muaj hla stitches, tawg threads, los yog xoob loops.
Stitch pitch: feem ntau 7-9 hli ib plooj (0.7-0.9 cm).
- 2.2 Hnab hauv qab
Pom Zoo Stitch: Ntau kab ntawm lub zog siab lockstitch (3 kab)
Rationale: Hauv qab dais tag nrho qhov hnyav ntawm cov ntsiab lus - nws yog qhov tseem ceeb tshaj plaws kev ntxhov siab. Cov qauv kev lag luam xav tau peb cov kab sib npaug sib npaug ntawm cov seam hauv qab los tsim kom muaj kev rov ua dua tshiab uas ua kom muaj kev nyab xeeb zoo.
Cov txheej txheem tseem ceeb Parameter:
Lub seam feem ntau folded ob (ob chav hem) ua ntej stitching.
Tag nrho seam dav: txog 20 hli, nrog cov kab sib npaug (tsis muaj sib tshooj).
Yam tsawg kawg nkaus lub zog: sab seam Ntau dua lossis sib npaug li 67% ntawm lub hauv paus ntaub lub zog; hauv qab seam Ntau dua lossis sib npaug li 42% ntawm lub hauv paus ntaub lub zog.
- 2.3 Lifting Loops (Straps / Belts)
Pom Zoo Stitch: Kev sib xyaw ntawm lockstitch thiab chainstitch nrog cov qauv txhawb nqa
Lub ntsiab lus: Lifting loops nqa tag nrho dynamic lifting load - lawv yog "lifeline" ntawm lub hnab.
Lockstitch yog siv rau lub ntsiab txuas rau lub hnab lub cev, nrog cov hlua khi tso rau 5 hli ntawm ntug thiab 10 hli ntawm lub pluaj kawg.
Chainstitch feem ntau ntxiv rau qhov chaw thauj khoom dynamic, raws li nws tuaj yeem ua kom lub zog tensile los ntawm 30-50% raws li kev cuam tshuam.
Kev txhawb nqa stitches (xws li "X-box", "square", "zig-zag" lossis ntau qhov kev hla) yog siv rau ntawm cov ntsiab lus txuas los faib kev ntxhov siab.
Cov txheej txheem tseem ceeb Parameter:
Yam tsawg kawg 3 back-stitches (rov qab stitches) yuav tsum tau ua thaum pib thiab xaus ntawm txhua qhov seam kom tiv thaiv kev tsis sib haum xeeb.
- 2.4 Inlet thiab Outlet Spouts
Pom zoo Stitch: Lockstitch rau txuas + Overedge rau ntug xov
Qhov laj thawj: Spouts feem ntau siv thiab raug puas thiab rub.
Lockstitch ruaj lub spout ruaj khov rau lub hnab lub cev.
Overedge tiv thaiv cov ntug raw ntawm spout los ntawm fraying, ncua nws cov kev pab cuam lub neej.
Cov txheej txheem tseem ceeb Parameter:
Cov kab innermost stitch ntawm lub spout-rau-lub cev seam yuav tsum ua raws li cov kab kos sab hauv.
Txoj kab thib ob yuav tsum sib nrug li 5 hli los ntawm thawj zaug, tsis muaj kev sib tshooj.
- 2.5 Txhim kho Patches (piv txwv li, lub kaum ntse ntse, cov khoom txuas ntxiv)
Pom Zoo Stitch: Lockstitch lossis 4-needle 6-xov kev nyab xeeb stitch (ib lub zog muaj zog sib txuas)
Kev Ruaj Ntseg: Patches txhawb cov cheeb tsam kev ntxhov siab (piv txwv li, nyob ib puag ncig nqa lub voj voog lossis spouts).
Standard lockstitch txaus rau nruab nrab qhov cuab lub zog.
Rau cov haujlwm hnyav, 4-needle 6-xov stitching muab 2-3 zaug lub zog tensile ntawm cov seams zoo tib yam.
Cov txheej txheem tseem ceeb Parameter:
Stitches yuav tsum ncaj thiab perpendicular; pib taw tes yog feem ntau 10 mm los ntawm sab laug ces kaum ntawm thaj.
- 2.6 Raw Edges (txiav npoo ntawm ntaub, sab saum toj qhib, thiab lwm yam)
Pom zoo Stitch: Overedge (overlock)
Qhov laj thawj: PP woven npuag nyhav rau unravel ntawm txiav ntug. Overedge stitching encloses ntug, zoo tiv thaiv xov paj slippage thiab txhim kho tag nrho durability thiab tsos.
3. General Stitching Quality Requirements (Tag nrho cov Cheebtsam)
Tag nrho cov stitches yuav tsum ncaj, tsis muaj hla stitches, tawg threads, los yog xoob loops.
Back-stitching (rov qab stitching): yam tsawg kawg 3 stitches ntawm qhov pib thiab qhov kawg ntawm txhua qhov seam.
Rau lifting loops: stitch kab yuav tsum yog 5 hli ntawm ntug thiab 10 hli los ntawm lub voj kawg.
Hauv qab seam: siv 3 kab ntawm stitches nrog qhov sib nrug (kwv yees li 2 cm dav), tsis sib tshooj.
Koob thiab xov yuav tsum sib haum nrog polypropylene ntaub kom tsis txhob muaj kev puas tsuaj los yog tsis muaj zog seams.
4. Xaiv txoj hlua khi rau qhov chaw zoo
|
Cheebtsam |
Primary Stitch |
Thib ob |
Yog vim li cas |
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Lub cev |
Lockstitch |
- |
Static load, zoo zoo |
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Hauv qab |
Lockstitch (3 kab) |
- |
Siab tshaj static load, kev ruaj ntseg redundancy |
|
Lifting loops |
Lockstitch + chainstitch |
Txhim kho cov qauv (X, square) |
Dynamic lifting, kev ntxhov siab heev |
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Spouts |
Lockstitch (ntxiv) |
Overedge (ntug tiav) |
Kov abrasion, ntug tiv thaiv |
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Txhim kho thaj ua rau thaj |
Lockstitch los yog 4-needle 6-xov |
- |
Localized high-stress reinforcement |
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Cov ntug |
Tshaj dhau |
- |
Tiv thaiv fraying ntawm woven npoo |
Qhov zoo tshaj plaws stitch xaiv rau FIBCs sib npaug lub zog, elasticity, thiab tus nqi.Lockstitch yog lub workhorse rau feem ntau seams.
Chainstitch yog qhov zoo dua qhov kev poob siab-loading thiab elongation yog kev txhawj xeeb (tshwj xeeb tshaj yog nqa cov loops).
Overedge yog qhov tseem ceeb rau kev ua tiav ntawm ntug kom tiv thaiv kev ua tsis tiav ntxov ntawm fraying.
Los ntawm kev siv cov lus pom zoo no thiab tswj cov txheej txheem nruj me ntsis (stitch pitch, back-stitching, thiab seam alignment), cov tuam txhab tuaj yeem ua kom ntseeg tau tias txhua FIBC ua tau raws li qhov yuav tsum tau muaj kev nyab xeeb thiab kev ua tau zoo rau nws txoj kev npaj siv.