Автоматическая вращающаяся стретч-пленкообмотчик для линий розлива и упаковки напитков на паллеты.

Резюме

On high-speed bottling and canning lines, finished loads present a classic packaging dilemma: pallets are heavy (often exceeding 1,000 kg), yet shrink-bundled PET bottles or aluminum cans have extremely low interlayer friction. Spinning these loads on a standard turntable introduces destabilizing centrifugal forces that shear the top layers off the pallet. An automatic rotary arm stretch wrapper resolves this kinetic risk by keeping the pallet completely stationary on the heavy-duty roller conveyor while an overhead driven arm orbits the perimeter. Operating at variable speeds of 10–14 r/min with powered pre-stretch up to 200%, this integrated packaging system secures pallet footprints up to 1,200 × 1,200 × 1,600 mm at line rates of 20–40 pallets per hour. The engineering breakdown below analyzes film yield economics, in-line roll change buffering, structural containment mechanics, and full EN/ISO machine safety compliance.

Содержание

• Почему поддоны с тяжелыми напитками не должны вращаться
• Данные о вращении рычага
• Какую экономию обеспечивает 200% предварительное растяжение?
• Перекладывайте мелочь, пока идет очередь.
• Привязывание связок к поддону
• Контрольный список выбора
• Охрана клетки
• Часто задаваемые вопросы по инженерным вопросам
• Следующий шаг
• Связанное чтение
• Источники

Почему поддоны с тяжелыми напитками не должны вращаться

A full pallet of bottled water, beer, or soft drinks represents a dynamic hazard during terminal packaging. Pallets frequently weigh between 800 kg and 1,500 kg, while nested shrink-wrapped beverage packs feature low surface friction (PE-to-PE static friction coefficient μ_s ≈ 0.2–0.3).

When processed on a conventional turntable machine, angular acceleration and deceleration exert continuous centrifugal and inertial shear forces on the stacked layers. Even minor acceleration spikes can cause the upper bundles to shift, leading to corner overhang, crushed bottles, or catastrophic stack collapse. Furthermore, supporting dynamic live loads of this scale requires oversized turntable slewing rings and heavy drive motors.

The rotary arm stretch wrapper decouples payload mass from wrapper dynamics. The pallet remains stationary on the powered in-feed roller conveyor throughout the wrapping cycle. Only the balanced overhead arm and counterweighted vertical carriage move. Machine sizing, rotational inertia, and cycle wear depend solely on the lightweight arm assembly, while the conveyor bed independently supports the static deadweight of the pallet.

Данные о вращении рычага

Какую экономию обеспечивает 200% предварительное растяжение?

Powered pre-stretch units mechanically elongate the film between two geared rollers inside the carriage before it reaches the pallet. At a 200% pre-stretch ratio, each 1.0 m of master roll film is transformed into 3.0 m of usable wrapping web applied directly to the beverage load.

Consider a standard 1,200 × 1,000 mm beverage pallet requiring approximately 70 m of perimeter coverage across primary containment layers:

Beyond direct material savings, pre-stretching activates the polyethylene polymers:

1. Resilient Memory (Restoring Force): Stretched LLDPE film attempts to recover its original dimensions, generating continuous elastic containment force that binds unstable packs tightly toward the load center.
2. Edge-Crush Prevention: Film feed tension on the load is governed independently by the secondary inverter-driven delivery motor. This eliminates high instantaneous tension peaks at pallet corners, preventing the film from crushing PET bottle necks or creasing corrugated trays.

Перекладывайте мелочь, пока идет очередь.

Beverage production lines run continuously; unwrapping or film replenishment cannot force an upstream case packer or palletizer to halt. When the master film reel reaches end-of-roll, the overhead arm parks automatically at a predetermined, hard-coded maintenance position away from the main transport axis.

To avoid interrupting upstream production, the in-feed roller line must provide adequate accumulation buffering:

Required In-feed Buffer Positions = Roll Change Downtime ÷ Pallet Cycle Interval

For a packaging line outputting 40 pallets/hour, a new pallet arrives every:

3,600 s ÷ 40 = 90 s

A standard manual film splice and thread routine takes an experienced operator approximately 4 minutes (240 s):

240 s ÷ 90 s = 2.67 → 3 Accumulation Buffers Minimum

Because a 200% pre-stretch system yields roughly three times the wrap coverage per roll, film change intervals are extended threefold. This drastically reduces maintenance downtime, operator cell interventions, and in-feed conveyor queue jams.

Привязывание связок к поддону

Transport analysis demonstrates that most beverage pallet failures occur at the bottom interface: the base layer of plastic-wrapped packs slides across smooth wooden deck boards during truck braking.

To eliminate transit load-shedding:

• Base Overwrap Lock: The rotary arm program applies 3–4 reinforced bottom wraps that deliberately overlap the top 50–70 mm of the pallet deck boards, locking the bottom container layer directly to the timber base.
• Film Roping Option: For severe long-haul transport, an optional pneumatic roping device condenses the lower web of film into a high-tensile elastic band (rope). This rope locks securely beneath the pallet top deck without interfering with downstream forklift tines or automated conveyor rollers.
• Top-Down Tension Profiling: Top bundles carry no counterweight and are prone to being pulled inward. The PLC wraps the top layer under reduced secondary tension. Combined with automatic photocell height tracking, loads from 800 mm to 1,600 mm tall are wrapped seamlessly without manual program adjustment.

Контрольный список выбора

Before finalizing an integrated rotary arm wrapper specification, submit the following boundary parameters:

1. Load Dimensions & Profile: Minimum and maximum pallet width, length, overall height, and gross load weight.
2. Формат первичной упаковки: Loose nested PET bottles, shrink-film bundles with/without cardboard bottom pads, or rigid cartons.
3. Required Line Throughput: Sustained and peak pallets-per-hour rating from upstream accumulation lines.
4. Conveyor Interface Engineering: Roller pitch, effective width, passline height (typically 450–650 mm), and line speed synchronization.
5. Buffer Envelope Footprint: Available footprint length for in-feed accumulation and wrapped out-feed inspection conveyors.
6. Auxiliary Module Selection: Requirement for auto clamp-cut-wipe systems, pallet top-sheet dispensers (for dust/moisture proofing), or top-platen stabilizer pads for ultra-light containers.

Охрана клетки

Rotary arm machines operate with high angular momentum across an open perimeter. Machine safety must conform strictly to European and international standards:

• Гармонизированные стандарты: Full compliance with EN 415-6 (Safety of packaging machines — Pallet wrapping machines), risk assessed under EN ISO 12100: 2010, with control system safety circuits executed in accordance with EN ISO 13849-1 (Performance Level d / Category 3 minimum).
• Physical Cell Enclosure: Floor-anchored steel mesh perimeter guarding (minimum 2.0 m height) surrounds the arm’s rotating sweep radius, preventing personnel intrusion during automated cycles.
• Блокированный доступ: All service access gates feature monitored electrical safety interlock switches with mechanical guard locking to satisfy OSHA Lockout/Tagout (LOTO) and EN standards; opening a gate initiates an immediate Category 0 emergency stop.
• Защита конвейера на входе/выходе: Optical muting light curtains distinguish pallet profiles from personnel. Pallets pass freely through the active sensing field, while unauthorized personnel entry cuts circuit power to the motor inverter and engages the electromechanical arm brake instantly.

Часто задаваемые вопросы по инженерным вопросам

Q: Does pallet weight restrict the maximum wrapping speed of the rotary arm? A: No. Unlike turntable wrappers where heavy loads induce high drive-train friction and centrifugal instability, the rotary arm rotates over a stationary pallet. Pallet weight is supported purely by the stationary roller conveyor bed, allowing consistent 10–14 r/min arm speeds regardless of whether the pallet weighs 200 kg or 1,500 kg.

Q: Can the rotary arm wrap unstable, lightweight empty bottles or single-tier loads? A: Yes. Because the pallet does not move, stability concerns during wrapping are eliminated. For extremely light PET containers prone to displacement by film draft or initial feed tension, an optional overhead pneumatic stabilizer platen holds the top layer firm until containment wraps are applied.

Q: How does the machine handle varying pallet heights on the same production run? A: A high-accuracy diffuse photoelectric sensor mounted on the carriage continuously detects the top edge of the load during ascent. When the sensor clears the top boundary, the PLC executes the preset count of top wraps and reverses carriage motion, wrapping variable batches between 800 mm and 1,600 mm without manual intervention.

Q: How is the stretch film clamped and severed at the end of the automatic cycle? A: An integrated pneumatic clamp-and-cut unit grasps the film web upon cycle completion, cuts it with an impulse hot wire or serrated blade, and uses an air wipe or mechanical brush to smooth the trailing film tail firmly against the load body.

Q: What maintenance is required for the overhead rotation drive? A: The main slewing bearing requires scheduled greasing every 1,000 operational hours. The drive belt or drive ring tension, lift chain lubrication, and carriage guide rollers should be checked during monthly preventive maintenance inspections.

Следующий шаг

1. Пришлите технические характеристики вашего поддона.: Forward your exact pallet footprints, maximum load heights, gross weights, and upstream cycle times to info@fhopepack.com.
2. Factory Engineering Review: Our packaging mechanical team will model your wrap profile, calculate powered pre-stretch ROI, and lay out in-feed buffer configurations.
3. Turnkey Technical Proposal: Receive a complete equipment layout drawing, pneumatic/electrical schedule, and formal capital quotation within 24 hours.

Связанное чтение

• Вращающаяся упаковочная машина для стретч-пленки RAS200 (продукт)
• Автоматическая машина для упаковки бутылок с напитками в стрейч-пленку
• Машина для упаковки поддонов с поворотным рычагом
• Машина для обертывания стретч-пленкой с двойным поворотным рычагом
• Паллетный упаковочный аппарат FHOPE R100 с вращающимся рычагом и устройством для резки пленки.
• Полностью автоматическая линия для упаковки поддонов

Источники

• FHOPE Packaging Machinery Co., Ltd., Technical Specifications: Automatic Rotary Arm Pallet Wrapper RAS Series, Engineering Archive.
• ISO 12100:2010 — Безопасность машин. Общие принципы проектирования. Оценка риска и снижение риска.
• EN 415-6:2013 — Безопасность упаковочных машин — Часть 6: Машины для обмотки паллет.
• EN ISO 13849-1:2015 — Безопасность машин и оборудования — Компоненты систем управления, связанные с безопасностью — Часть 1: Общие принципы проектирования.
• EN 60204-1:2018 — Безопасность машин и механизмов — Электрооборудование машин и механизмов — Часть 1: Общие требования.

Последнее обновление: 21.09.2026