Bottle Turntable Pallet Wrapper: Overlap and Wind Settings

Name: 自动瓶子转盘托盘缠绕包装机
Uploaded: 2018-04-17T08:23:08+00:00
Duration: 1 min 46 s
Description: > **Executive summary** > Our automatic turntable wrapper takes bottled drink pallets on a roller conveyor and wraps them with no operator. Powered pre-stretch keeps tension constant, which matters for light, unsteady shrink packs. The film overlap comes from two settings: turntable speed and carriage speed. At 12 rpm and…

执行摘要 Our automatic turntable wrapper takes bottled drink pallets on a roller conveyor and wraps them with no operator. Powered pre-stretch keeps tension constant, which matters for light, unsteady shrink packs. The film overlap comes from two settings: turntable speed and carriage speed. At 12 rpm and 2.9 m/min, the carriage rises about 242 毫米 per turn, so 500 mm film overlaps by about half.

Why bottle pallets are different

In this installation, our wrapper sits inline with the plant conveyors and handles tall pallets of shrink-wrapped bottle packs. The infeed conveyor moves each pallet onto the roller turntable. After wrapping, the turntable conveyor sends it to the outfeed line.

Bottle packs are light for their size, and each layer sits on round bottle tops. The stack can lean or slide if the film pulls unevenly. So the wrapper has to keep the film tension steady over the whole pallet, and tie the bottom layer to the pallet. The turntable has soft start and stop, so the stack is not jolted when rotation begins or ends.

Automatic turntable stretch wrapping machine with roller conveyor turntable and film carriage mast — **Automatic turntable stretch wrapper.** The roller turntable takes pallets in and out on conveyors.

规格

参数	价值
输出	每小时至少24车次
最大负载重量	1,800 kg
转台	2,200 mm diameter, max. 12 rpm (adjustable), chain-drive roller conveyor
启动和停止	软启动和软停止
拉伸膜	线性低密度聚乙烯（LLDPE），宽 500 毫米，厚 0.025 毫米
预拉伸	250%（可选100-300%）
胶片运输速度	2.9 m/min
包裹层	底部、中部、顶部：每个风速为 0–99 风速
高度检测	photocell sensor

Overlap from rpm and carriage speed

During the spiral wrap, the turntable turns while the carriage moves up the mast. How far the carriage rises in one turn sets the film overlap. Here is the calculation at full speed:

Time per turn. At 12 rpm, one turn takes 60 ÷ 12 = 5 s.
Carriage rise per turn. At 2.9 m/min, the carriage rises about 48 mm/s, so about 242 mm in 5 s.
Nominal overlap. With 500 mm film, each turn covers about 500 − 242 = 258 mm of the turn below, or about 52%.

If the turntable runs slower while the carriage speed stays at 2.9 m/min, the carriage rises more per turn and the overlap falls. At an illustrative 8 rpm, one turn takes 7.5 s, the carriage rises about 362 mm and the overlap is about 138 mm.

These are planning figures. Pre-stretched film narrows a little before it reaches the load, so we confirm the overlap on a trial pallet. The overlap setting on the control is adjustable to suit your load.

Wind pattern for bottle packs

We set bottom, middle and top winds separately, each from 0 to 99:

Bottom winds. Extra winds tie the first layer of packs to the pallet, so the stack cannot slide off the deck.
Middle. The spiral wrap with steady overlap holds the layers together.
Top winds. Extra winds hold the top layer, which has no weight on it.

Motor-driven pre-stretch rollers deliver the film, and an electronic system measures the speed to keep the tension constant. This lets us wrap light and unsteady pallets that friction-brake systems cannot wrap well. The re-wrap and overwrap functions are also available.

Film handling for unmanned running

夹钳。 Scissors-like gripper bars hold the film tail for the next load.
切。 An instant heating wire cuts the film.
擦拭。 A soft brush presses the tail onto the pallet.

Sensors and the PLC program control each step. The operator only changes film rolls and other consumables.

公用设施和安全

公用事业	需求
电力	交流电 380 伏，三相，50 赫兹
电机	转盘功率 0.75 千瓦，滚轮功率 0.75 千瓦，托架功率 0.37 千瓦，预拉伸功率 0.37 千瓦
空运	6–8 kgf/cm² 供气压力
Controls	PLC, pre-stretch controller, separate buttons and HMI

安全装置包括红色蘑菇头紧急停止按钮和可锁定的电源断路器。适用的标准取决于目标市场。对于CE认证市场，ISO 12100规定了风险评估方法，EN 415-10规定了包装机械的通用要求。

Selection checklist for bottle pallets

托盘尺寸、堆垛高度和重量。
Pack type: shrink packs, cases or trays.
Pallets per hour from the filling line.
Target overlap and bottom and top winds.
Infeed and outfeed conveyors, or forklift loading.
Power supply and compressed air at the wrapper.

工程常见问题解答

Q: How is the film overlap set? A: By the turntable speed and the carriage speed. At 12 rpm and 2.9 m/min, the carriage rises about 242 mm per turn, which gives about 52% overlap with 500 mm film.

Q: Why confirm the overlap on a trial pallet? A: The calculation uses the nominal 500 mm film width. Pre-stretched film narrows a little before it reaches the load, so the real overlap is somewhat lower. A trial pallet shows the actual figure.

Q: How do you stop light bottle packs from shifting? A: With powered pre-stretch at constant tension, and with extra bottom and top winds from the 0–99 range.

Q: How many pallets per hour can it wrap? A: At least 24 loads per hour, or 150 s per pallet.

Q: What is the maximum load? A: 1,800 kg on a 2,200 mm turntable.

下一步

We match the wrapper to your bottling line in three steps:

提交您的布局图 with pallet size, pack type and pallets per hour to info@fhopepack.com.
48小时内收到方案, with wrapper, conveyors and wrap settings.
预约现场勘测 to fit the wrapper to your end-of-line floor.