Metering Feeder Loss-In-Weight Scale

Metering Feeder Loss-In-Weight Scale: Precision Feeding for Extrusion Processes

With over 17 years of hands-on experience in plastic extrusion equipment optimization and material handling systems, I’ve worked with 250+ manufacturers across the globe to solve feeding inefficiencies—one of the most common bottlenecks in extrusion production. The Metering Feeder Loss-In-Weight Scale (LIW) and volumetric feeder systems are foundational to consistent extruder performance, directly impacting product quality, material waste, and overall production efficiency. While volumetric feeders offer cost-effective solutions for standard applications, loss-in-weight scales deliver the precision required for high-value, tight-tolerance extrusion processes—making both systems critical tools in the modern plastic processing facility.

Volumetric Feeder: Cost-Effective Feeding for Standard Extrusion Applications

The volumetric feeder is suitable for most extruder feeding solutions, it has low-cost and high-efficiency feeding characteristics. As the most widely used feeding system for general extrusion applications, volumetric feeders balance affordability with reliable performance, making them ideal for small to mid-sized manufacturers processing non-critical materials (wek mînak., general purpose PE/PP, rigid PVC compounds) where precise dosing is not a primary requirement.

Unlike loss-in-weight scales that measure material weight in real-time, volumetric feeders deliver a consistent volume of material to the extruder—controlled by screw rotation speed and screw geometry. This simplicity translates to lower upfront costs (30-50% less than loss-in-weight systems) û parastina hindiktirîn, making volumetric feeders a practical choice for high-volume, low-margin production runs.

Core Design of Volumetric Feeders for Extruder Applications

The volumetric feeder consists of a small twin screw, kûp, and motor Filler Masterbatch Machine Manufacturer engineered for reliable material flow and minimal downtime. The compact twin-screw design addresses two key challenges of single-screw volumetric feeders: material bridging and inconsistent discharge, which directly impact extruder throughput and product quality.

When the material enters the barrel, the screw is simply rotated by the stirring roller, which not only pushes the material to the bottom, but also reduces clogging, making it easier to discharge, saving time and energy, and solving the problem of slow discharging affecting productivity. The intermeshing twin screws create a positive displacement action, ensuring that material is consistently conveyed to the extruder feed throat—even for materials with poor flow characteristics (wek mînak., regrind flakes, pelletized PVC with high filler content).

Key design features of Zhuoyue’s volumetric feeders include:

• Modular Twin-Screw Design: Screws are available in multiple pitch configurations (10mm, 15mm, 20mm) to match material flow properties—shorter pitches for low-flow materials (regrind), longer pitches for free-flowing pellets.
• Variable Speed Motor: IE3 efficiency motors with 0-100 rpm kontrol leza eyar, rê dide verastkirina volqê ya rast ku bi hilberîna extruder re li hev bike (5-2000 kg/hr).
• Dij-Clogging Stirring Roller: Rola tevhevokê ya yekbûyî ya li ketina hêlîna xwarinê pêşî li pira maddî û qutbûna mêş digire, misogerkirina ketina materyalê ya domdar di bermîla du-pişk de.
• Peya Compact: Ji bo ku di cîhên fabrîkî yên teng de bicîh bibin hatine sêwirandin, bi sivikkirina hêsan ji bo gewriya xwarina extruder an çarçoveyên piştgirî yên serbixwe.
• Paqijkirina hêsan: Ji bo guhertinên bilez ên materyalê kombûnên bermîl û pêçan ên zû berdan (Ji bo piraniya materyalan ≤10 hûrdem), kêmkirina dema bêhnvedanê di navbera beşên hilberînê de.

Feydeyên sereke yên Feederên Volumetric

1. Bi tevahî Mesrefa Xwedîtiya Kêm

Feydeyên volmetrîk ji her pergala xwarina pîşesaziyê xwedan lêçûna pêşîn a herî hindik in, bi mînîmal parastina berdewam (hucreyên barkirinê tune, sensors, an elektronîk tevlihev ji bo calibrate). Routine maintenance is limited to lubrication of moving parts and periodic screw/barrel inspection—tasks that can be performed by in-house maintenance teams without specialized training.

2. High Efficiency for Standard Materials

For free-flowing pellets (wek mînak., virgin PE/PP) and non-critical compounding applications, volumetric feeders deliver 95% feeding efficiency (material delivered vs. material hoppered), with discharge consistency of ±2%—sufficient for applications like general-purpose pipe extrusion, sheet production, or profile extrusion where tight tolerances are not required.

3. Easy Operation & Training

With a simple control interface (analog speed dial or basic digital controller), volumetric feeders require minimal operator training—typically 1-2 hours of hands-on instruction. This is a critical advantage for manufacturers with high operator turnover or limited technical staff.

4. Compatibility with Wide Range of Materials

Zhuoyue’s volumetric feeders handle a broad range of plastic materials, giştî:

• Virgin pellets (PE, PP, PVC, ABS, PS)
• Regrind flakes/pellets (heta 50% regrind content)
• Filled compounds (heta 40% calcium carbonate/talc filler)
• Color masterbatches (low to medium loading rates)

Loss-In-Weight (LIW) Scale Metering Feeder: Precision Feeding for Critical Applications

While volumetric feeders excel in cost-effective, standard applications, Filler Masterbatch Machine Factory Loss-In-Weight (LIW) scale metering feeders are engineered for precision dosing—essential for high-value extrusion processes where material consistency directly impacts product performance, regulatory compliance, or production yield. LIW feeders measure the weight of material being discharged in real-time, adjusting screw speed dynamically to maintain exact dosing rates (±0.1% accuracy), making them the gold standard for medical, automotive, and aerospace plastic processing.

How Loss-In-Weight Scale Metering Feeders Work

LIW feeders operate on the principle of continuous weight measurement:

1. The feeder hopper, twin-screw assembly, and drive system are mounted on high-precision load cells (accuracy ±0.01% of full scale).
2. As material is discharged to the extruder, the load cells measure the rate of weight loss in the hopper.
3. A PLC (Programmable Logic Controller) compares the actual weight loss rate to the target setpoint (wek mînak., 50 kg/hr).
4. The PLC adjusts the twin-screw speed in real-time to correct any deviation from the target rate—slowing the screw if discharge is too fast, speeding it up if discharge is too slow.
5. Dema ku asta hopperê digihîje bendek nizm, pergalek dagirtî ya otomatîkî (conveyor pneumatîk an auger) hêlînê ji nû ve dadigire — digel ku PLC giraniya dagirtinê hesab dike da ku domdar bimîne, dozkirina rast.

Ev pergala kontrolê ya girtî piştrast dike ku extruder her yekîneyek dem giraniyek domdar a materyalê werdigire, bêyî ku taybetmendiyên herikîna maddî (wek mînak., Guhertoyên dendika mezin di regrind, Di materyalên hîgroskopîk ên mîna PA/PC-ê de ji hêla nermbûnê ve hatî kişandin).

Taybetmendiyên sêwirana bingehîn ên Feederên Metering Zhuoyue LIW

Pîvana pîvandinê ya Zhuoyue-yê Zhuoyue li ser îspatkirî ava dike China Underwater Pelletizer System Wholesale sêwirana du-screw ya fêkiyên meya volumetric, lê zêdekirina pergalên pîvandin û kontrolê yên rast da ku rastbûna pêşeng a pîşesaziyê peyda bike:

• Hucreyên Barkirina Bilind-Pêkûpêk: Stainless steel shear beam load cells with temperature compensation (-10°C to 50°C) to eliminate drift from factory temperature fluctuations.
• Advanced PLC Control System: Color HMI touchscreen with pre-programmed material profiles (wek mînak., medical-grade PVC, XLPE cable compounds, glass fiber-reinforced PA).
• Automatic Refill System: Vacuum or pneumatic refill with anti-surge control to minimize weight measurement errors during hopper refilling.
• Material Conditioning Options: Integrated hopper heaters/dehumidifiers for hygroscopic materials, and vibration assist for low-flow materials (wek mînak., glass fiber-filled compounds).
• Data Logging & Traceability: Built-in data logging (heta 1 year of historical data) for compliance with FDA, ISO, and automotive industry (IATF 16949) traceability requirements.
• ATEX-Certified Options: For use in explosive atmospheres (wek mînak., processing flammable plastic powders or solvents), li gorî Rêbernameya ATEX 2014/34/EU.

Feydeyên sereke yên Feederên Metering LIW

1. Rastiya Dozkirinê ya bêhempa

Bi rastbûna dozkirinê ± 0,1% û dubarebûna ± 0,05%, Fêrkerên LIW têketina materyalê ya domdar ji extruder re misoger dikin - ji bo krîtîk:

• Extrusion amûrê bijîjkî (tuba IV, amûrên cerrahî) li ku derê tolerasyona pîvanê ± 0.01 mm e
• Extrusion component Automotive (gaskets, sêwirana hundurîn) ku lihevhatina materyalê bandorê li taybetmendiyên mekanîkî dike
• extrusion insulasyona Cable (XLPE/LSZH) cihê ku stûrbûna însulasyonê rasterast bandorê li performansa elektrîkê dike

Testkirina partiya sêyemîn ji hêla Civaka Navneteweyî ya Xweseriyê ve (ISA) piştrast dike ku fîderên LIW yên Zhuoyue di heman demê de bi guheztinên dendika maddî yên heya% 15-ê rastbûnê diparêzin - pirsgirêkek hevpar a bi plastîkên vezîvirandin an dagirtî.

2. Bermayiyên Madeyê Kêm kirin

Dozkirina rast xwarina zêde ji holê radike (pirsgirêkek hevpar bi fêkiyên volumetric), kêmkirina bermayiyên maddî bi 3-5% per run hilberînê. Ji bo materyalên bilind-nirx (wek mînak., TPU-pola bijîjkî bi $5 / kg), ev tê wateya teserûfa lêçûna salane ya $50,000-$150,000 ji bo 24/7 tesîsa hilberînê.

3. Pêkhatina Rêkûpêk & Traceability

Têketin û şopandina daneyan a çêkirî, LIW feeder ji bo pîşesaziyên birêkûpêk îdeal dike. Hemî pîvanên dosing (setpoint, rêjeya rastîn, cureyê materyalê, ID operator) têne tomar kirin û dikarin ji bo vekolînên birêkûpêk bi formata CSV/PDF-ê werin derxistin - ji bo FDA-yê krîtîk 21 CFR Part 11 bidilî (tomar elektronîk / îmze) di çêkirina amûrên tibbî de.

4. Îstiqrara pêvajoyê & Kalîteya hilberê

Xwarina materyalê ya domdar tevahiya pêvajoya derxistinê stabîl dike, kêmkirina guhertina di zexta helandinê de, germî, û pîvanên hilberê. Ev bi encam dibe:

• Rêjeyên hilweşandinê kêm kirin 50-70% ji bo sepanên krîtîk
• Kêmtir hilberandin red dike (down to <0.5% for medical tubing)
• Longer extruder screw/barrel life (reduced wear from inconsistent feeding)

Taybetmendiyên Teknîkî: Zhuoyue Metering Feeder Systems

1. Volumetric Feeder Specifications

Cins	Twin-Screw Diameter (mm)	Speed Range (rpm)	Feeding Capacity (kg/hr)	Motor Power (kW)	Accuracy
ZYVF-15	15	0-80	5-50	0.75	±2%
ZYVF-25	25	0-90	20-150	1.5	±2%
ZYVF-35	35	0-100	50-500	2.2	±2%
ZYVF-50	50	0-100	100-2000	4.0	±2%

2. Loss-In-Weight (LIW) Metering Feeder Specifications

Cins	Twin-Screw Diameter (mm)	Speed Range (rpm)	Feeding Capacity (kg/hr)	Motor Power (kW)	Load Cell Capacity (kg)	Accuracy
ZYLIW-15	15	0-80	5-50	0.75	50	±0.1%
ZYLIW-25	25	0-90	20-150	1.5	150	±0.1%
ZYLIW-35	35	0-100	50-500	2.2	500	±0.1%
ZYLIW-50	50	0-100	100-2000	4.0	2000	±0.1%

Application Guide: Choosing Between Volumetric & LIW Feeders

Selecting the right feeder system depends on your material type, product requirements, and budget. Below is a clear guide to help you choose:

Factor	Choose Volumetric Feeder If…	Choose LIW Feeder If…
Material Type	Virgin pellets, general-purpose compounds, low-cost regrind	Medical-grade plastics, filled/ reinforced engineering plastics, LSZH/XLPE cable materials, high-value regrind
Accuracy Requirement	±2% accuracy is sufficient (general pipe/profile/sheet extrusion)	±0.1% accuracy required (medical tubing, pêkhateyên otomotîvê, cable insulation)
Pêkhatina Rêkûpêk	No strict traceability/compliance requirements	FDA, ISO, IATF 16949, or ATEX compliance required
Budget	Upfront cost is a primary concern (30-50% lower cost than LIW)	Long-term cost savings (waste reduction, quality improvement) justify higher upfront cost
Volume Production	High-volume, low-margin production	Mid-to-high volume, high-margin production

Lêkolîna Case: LIW Feeder Improves Medical Tubing Production (EU Facility)

A leading EU medical device manufacturer replaced volumetric feeders with Zhuoyue ZYLIW-25 LIW feeders for their soft PVC medical tubing production line in 2024. The client’s key challenges were:

• High scrap rate (8%) due to inconsistent feeding leading to dimensional variation
• Non-compliance with FDA 21 CFR Part 11 (lack of data traceability)
• Material waste of 6% from over-feeding

After installing the LIW feeders:

• Scrap rate dropped to 0.4% (95% kêmkirinî) ji ber ±0.1% rastbûna dozkirinê
• Çopên maddî kêm kirin 1% (83% kêmkirinî), di lêçûnên materyalê PVC de 75,000 € / sal xilas dike
• Lihevhatina tevahî bi FDA re 21 CFR Part 11 (qeydkirina daneyan û şopên kontrolê)
• Rêjeya hilberînê zêde bû 10% (ji redkirinên dimensîyonê bêtir dem ne)
• ROI bi dest xist 9 mehan

Xerîdar ragihand ku pêgirên LIW ne tenê hilber çêtir kirine Filler Masterbatch Machine Supplier kalîte û lihevhatin lê di heman demê de destwerdana operatorê% 50 kêm kir - karmend azad dike ku balê bikişîne ser karên din ên hilberîna krîtîk.

Lêkirinî, Calibration & Maintenance of Feeders Metering

1. Lêkirinî

Feydeyên pîvandinê yên Zhuoyue ji bo sazkirina hêsan têne çêkirin:

• Feydeyên Volumetric: Rasterast li qirikên xwarina extruderê siwar bikin (design flange-çiyayê) an çarçoveyên serbixwe, bi girêdanên elektrîkê bi panelên kontrolê yên extruder re (220V / 380V yek / sê qonax).
• LIW feeder: Li ser pêlên antî-vibrasyonê hatine danîn (ji bo rakirina destwerdana hucreya barkirinê) bi dorpêçên elektrîkê yên taybetî yên ji bo pergalên kontrolê. Sazkirin bi gelemperî digire 4-8 saetan per feeder.

Tîma meya teknîkî ya li ser cîhê hemî sazkirin û têlkirinê birêve dibe, misogerkirina lihevhatina bi kodên elektrîkê yên herêmî (CE, UL, NEC).

2. Calibration

Calibration ji bo rastbûna feeder krîtîk e:

• Feydeyên Volumetric: Bi rêvekirina materyalê bi navgîniyê ve û pîvandina qebareya dakêşanê di demek diyarkirî de tê kalîbrkirin (10 minutes). Lezbûn ji bo ku bi rêjeya xwarina armancê re têkildar be tê verast kirin - kalibrasyon digire 30 deqeyan per type maddî.
• LIW feeder: Kalibrasyona otomatîkî bi rêya HMI (tu giraniya manual pêwîst), bi tezmînata germahiya otomatîk. Kalibrasyon her car tê pêşniyar kirin 3 mehan (an jî piştî guhertinên maddî) û digire 15 deqeyan per feeder.

Zhuoyue ji bo her feeder sertîfîkayek kalibrasyonê peyda dike, lihevhatî bi ISO 9001 standardên kalîteyê.

3. Lênerrînî

Lênêrîna pêşîlêgirtinê jiyanek dirêj a feeder û performansa domdar misoger dike:

• Rojane: Inspect hopper for material bridging, clean feeder inlet/outlet, check motor temperature.
• Heftane: Lubricate screw bearings, inspect stirring roller for wear, verify speed calibration.
• Mehane: Inspect screw/barrel for wear (volumetric feeders), check load cell calibration (LIW feeder).
• Yeksalî: Replace wear parts (screws, stirring rollers), full system inspection and recalibration.

Zhuoyue offers a preventive maintenance program with scheduled on-site visits (sê mehane/salane) û 24/7 piştgiriya teknîkî ji bo tamîrên acîl.

FAQs About Zhuoyue Metering Feeder Loss-In-Weight Scale & Volumetric Feeders

Q: Can LIW feeders handle recycled plastics with inconsistent bulk density?

YEK: Erê. Zhuoyue’s LIW feeders use dynamic speed adjustment to compensate for bulk density variations (heta 15%) in recycled plastics. We also offer custom screw profiles for regrind materials to improve flow and reduce measurement error.

Q: What is the lead time for custom-configured LIW feeders?

YEK: Modelên standard (ZYLIW-15 to ZYLIW-50) demek pêşeng heye 4-6 hefteyan. Veavakirinên Custom (ATEX certification, cleanroom compatibility, material conditioning options) xwestin 8-10 hefteyan. Hilberîna bilez kirin (3-dema rêberiya hefteyê) is available for an additional 20% fee.

Q: Do you provide operator and maintenance training?

YEK: Erê. We offer 1-day on-site training for operators (basic operation, calibration, çareserkirina pirsgirêkan) and 2-day training for maintenance technicians (advanced calibration, repair, part replacement). Perwerde bi Îngilîzî heye, Almanî, Fransî, Îspanyolî, û Mandarin.

Q: Can multiple feeders be synchronized with a single extruder (for multi-component compounding)?

YEK: Erê. Zhuoyue’s central control system can synchronize up to 4 feeders (main material + additives/fillers) with a single extruder, ensuring precise ratio control (wek mînak., 95% PE + 5% color masterbatch). Ev îdeal e ji bo berhevkirina serîlêdanên ku hewceyê gelek pêkhateyên materyalê ne.

Q: Garantî ji bo fêkiyên pîvandina Zhuoyue çi ye?

YEK: Feydeyên Volumetric: 2-ermanî sal li ser pêkhateyên mekanîk (screws, bermîlan, motors), 1-ermanî sal li ser elektronîk. LIW feeder: 3-garantiya salekê li ser hucreyên barkirinê û pêkhateyên mekanîkî, 2-ermanî sal li ser elektronîk. Em di heman demê de vebijarkên garantiya dirêjkirî jî pêşkêş dikin (heta 5 salan) ji bo heqê zêde.

Wekî dabînkerek pêbawer a pergalên fêdekirina pîvandinê ji bo zêdetir 17 salan, Fêrkerên volumetric û winda-di giraniya Zhuoyue ji bo peydakirina hewcedariyên cihêreng ên hilberînerên extrusiona plastîk-ji xwarina standard-biha-bandor heya dozkirina rast ji bo pîşesaziyên birêkûpêk têne çêkirin.. Bala me li ser pêbaweriyê, tamî, û karanîna hêsan piştrast dike ku pêvajoya xwarina extruderê we bikêr e, hevhatî, û lêçûn-bandor - ji we re dibe alîkar ku hûn hilberîna hilberînê û kalîteya hilberê zêde bikin. Îro bi tîmê meya teknîkî re têkilî daynin da ku hûn hewcedariyên xwarina we nîqaş bikin û rêbernameyek hilbijartî ya belaş a ku li gorî serîlêdana weya derxistinê hatî veguheztin daxwaz bikin..