Bar Wrapping Machine and Small Orbital Wrapper: Specs

Name: 全自动棒材包装机和小型轨道式包装机：尺寸、速度和薄膜间距
Uploaded: 2018-04-17T09:15:29+00:00
Duration: 1 min 46 s
Description: > **Executive summary** > We wrap single bars and small bar bundles on a small orbital wrapper, where the bar runs on a conveyor through a turning ring and never rotates. Our S200 takes bars from **10 mm** to 200 mm across and from 300 mm long. Longer and heavier…

执行摘要 We wrap single bars and small bar bundles on a small orbital wrapper, where the bar runs on a conveyor through a turning ring and never rotates. Our S200 takes bars from 10 毫米 to 200 mm across and from 300 mm long. Longer and heavier bar bundles go to our rod wrapping machine, with up to 10 m length. Film coverage comes from the ratio of conveyor speed to ring speed.

Which bar wrapping machine: small orbital wrapper or rod wrapper

参数	S200 small orbital wrapper	绕棒机
Bar or bundle size across	10–200毫米	200–500毫米
长度	> 300毫米	2000–10000毫米
重量	10-100 kg	sized to the bundle
环速	20–120 转/分钟	30–60 转/分钟
Conveying or wrapping speed	4–12 米/分钟	2–12 米/分钟
电力	约2.1千瓦	6.8 kW
电影	LLDPE stretch film, 120–200 mm wide	PE, stretch film, knit belt, VCI paper

S200 has 2000 mm motor-driven infeed and outfeed conveyors and runs on AC 380 V, 60 Hz. The rod wrapping machine runs on AC 380 V, 50 Hz, or to your requirement. For automatic operation with an automatic cutter and feeder, our E200 takes packages of 50–200 mm across and over 1000 mm long.

How the bar wrapping cycle runs

We built the small orbital wrapper in this video to wrap long metal bars one at a time on a roller conveyor:

0–8 s, start. The operator places the bar on the infeed conveyor and starts the cycle at the control cabinet. A photocell sets the wrapping start position.
8–40 s, wrap. The motor-driven conveyor carries the bar through the ring. The ring turns around the bar and lays stretch film in a spiral along its length. Adjustable plates with vertical guide rollers keep the bar on the ring centre.
40–44 秒，放电。 The wrapped bar leaves on the outfeed conveyor, and the operator takes it off at the end.

The bar does not rotate during wrapping. That keeps a long, thin bar straight and stops it whipping on the conveyor.

S200 small orbital wrapper. Bars run on the roller conveyor through the ring.

Film pitch and overlap on a bar wrapper

Each ring turn moves the bar forward by one pitch. We set the coverage with three numbers:

沥青 = conveyor speed ÷ ring speed. At 6 m/min and 60 r/min, the pitch is 100 mm.
交叠 = 1 − pitch ÷ film width. With 200 mm film, a 100 mm pitch gives 50% overlap, or two layers.
结束时间 = bar length ÷ conveyor speed. A 6 m bar at 6 m/min takes 60 s, and at 12 m/min it takes 30 s.

At the 120 r/min top ring speed of S200, a 100 mm pitch allows the full 12 m/min conveyor speed. Overlap is adjustable from 20% to 90% on the rod wrapping machine.

Bar length and conveyor length

A bar must bridge the infeed and outfeed conveyors while it passes the ring. That is why each model has a minimum length:

S200： over 300 mm, with 2000 mm conveyors on both sides.
E200： over 1000 mm, with 2000 mm motor-driven conveyors.
Rod wrapping machine: 2000–10000 mm, on a powered roller table.

For bars longer than the conveyors, we extend the conveyor length, which is an option on S200. The powered roller table of the rod wrapper has free and powered rubber-coated rollers, with adjustable speed through a geared motor.

Centring the bar in the ring

The film tension pulls evenly only when the bar sits on the ring centre. On S200, the centring plates move up and down to suit bundles of different sizes. The rod wrapping machine uses a pneumatic movement to hold the master bundle in the ring centre during wrapping, so the film goes on evenly and tight.

Tension is adjusted by a brake device on the film carriage. A thin bar needs less tension than a heavy bundle.

Rod wrapping machine. For bar bundles up to 10 m long.

Film and packing materials for bars

S200 runs LLDPE stretch film rolls 120–200 mm wide, 150–200 mm in diameter, on a 50 mm core. The rod wrapping machine also runs knit belt and VCI paper:

拉伸膜 for a clean, moisture-proof wrap on finished bars.
VCI论文 under film for steel bars that need rust protection in transit.
针织腰带 where the bars need a tougher wrap for handling.

控制和自动化

S200 uses a PLC program with an HMI. A converter controls the ring speed, the ring has soft start and soft stop, and alarms show on a fault. It can connect to a production line, and an automatic film cutter and feeder is an option for online wrapping.

The rod wrapping machine works online or offline, with converter speed control and automatic adjustment of the packing position.

Safety on a small orbital wrapper

The turning ring and the conveyor nip points are the main hazards. S200 has guardrails around the ring and double rings and wheels for stable running. The ring in this video sits behind a guard frame.

适用的标准取决于目标市场。对于欧盟CE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 a bar wrapping machine

Bar or bundle size across, including the largest diagonal.
Shortest and longest bar length.
Weight per bar or bundle.
Bars per hour and target conveyor speed.
Film type: stretch film, VCI paper or knit belt.
Standalone or inline with a cutting or bundling line.

工程常见问题解答

Q: What is the smallest bar the small orbital wrapper can take? A: S200 takes bars from 10 mm across and over 300 mm long, up to 100 kg. Below 300 mm, the bar cannot bridge the two conveyors.

Q: How fast can a 6 m bar be wrapped? A: Wrap time is length ÷ conveyor speed. At 12 m/min, a 6 m bar takes 30 s, if the ring runs fast enough to keep the pitch.

Q: What overlap should I set for bars? A: Start at 50%, which gives two layers. With 200 mm film that is a 100 mm pitch, for example 6 m/min at 60 r/min.

Q: When do I need the rod wrapping machine instead? A: When the bundle is over 200 mm across or the bars run 2000–10000 mm long. It takes bundles up to 500 mm across.

Q: Can the bar wrapper run inline? A: Yes. S200 can connect to the production line, and an automatic film cutter and feeder is available for online wrapping.

下一步

We size the bar wrapping machine to your bars in three steps:

提交您的布局图 with bar size, length range, weight, bars per hour and film type to info@fhopepack.com.
48小时内收到机器方案, with the model, conveyor lengths and pitch check.
预约现场勘测 to place the wrapper at your bar line.