What Is a Square Bottom Plastic Bag Making Machine Use Features Output

Which machine folds and seals a flat-based PE bag? And how fast does it run? Buyers ask this before they plan floor space. A square bottom plastic bag making machine seals and cuts PE film into bags with a square, flat base. Ruian Yunfeng Machinery has been in the plastic machinery industry for more than 20 years. One point comes up again and again: fold accuracy sets bag quality, not top speed. 

This guide covers the YF-FD series and its two models, the YF-FD800 and the YF-FD1000. It walks through the sealing cycle, the controls, and the output figures. Every number here comes from Yunfeng's own product data.

What a Square Bottom Plastic Bag Making Machine Actually Does

A square bottom plastic bag making machine takes PE film from a roll. It turns that film into finished bags with a flat base. Yunfeng lists the YF-FD as suitable for sealing and cutting PE film. The stated strengths are firm sealing, accurate folding, and full electric eye tracking. The machine is used mainly to make square bottom plastic film bags and square bags.

The square base is not cut into the bag. It is folded into the film first. The seal comes after the fold. That is why folding sits right next to sealing in the product notes.

A PE film bag making machine that folds off-center will still seal. But the base will not stand flat. Bag width and bag length are set inside the model limits. The rest of the shape follows the fold.

Key Facts at a Glance

Inside the Sealing and Cutting Cycle

The cycle has four stages. The film feeds in. The electric eye keeps the print in position. The bottom of the film is sealed and folded. After that, the length is cut.

Each step is built on the previous one. The fold ends up at the wrong spot if the film wanders. Then the seal follows that wrong fold.

But it is useful to know what the YF-FD does not do. It doesn't extrude film. The film does not blow. Made from a completed PE film. So the quality of the film is the buyer's duty, not the machine's.

Fully Automatic Electric Eye Tracking

An electric eye scans a printed mark on the film. That mark is to maintain the cut in the appropriate position. Plain film shows cut length as a number. Every bag on the printed film must have the print in the same spot. An obvious fault in a short run is a little drift every cycle. The roll feeds and the electric eye correct this drift.

Firm Bottom Sealing and Accurate Folding

Here, Yunfeng offers two assertions. The seal is exact, and the bottom fold is firm. The YF-FD, an automatic bag sealing and cutting machine, creates the bottom seal and cuts the bag in one operation. A firm base seal allows a filled bag to stand upright. The corner splits up first without it.

Control Features on the Automatic Square Bottom Bag Machine

The YF-FD series carries a set control package. Each item below is listed by the maker for this series:

• Computer control system

• Fully automatic electric eye tracking

• Static eliminator

• Automatic counting

• Automatic temperature control

• Alarm device

• Firm bottom seal

• Simple operation

These two are more important than what purchasers expect. As it moves across the rollers, PE film builds up static. The seal region is attracted to dust by a charged film, which clings and feeds poorly. Before the fold, the static eliminator removes that charge.

Automatic temperature control performs a similar function at the sealing bar. PE film seal strength has a rapid heat response. A weak base leaves a cool bar. A heated bar reduces the film thickness. A consistent heat setting ensures each bag is the same, from the first to the last. So that no one needs to count by hand, automatic counting ends the batch at the right number.

YF-FD800 and YF-FD1000 Technical Specifications

Both versions have the same frame and power rating. They vary in bag size, speed, and weight. The table below lists the published specs for the square bottom plastic bag making machine, exactly as they appear on the YF-FD product page.

Reading the Output Figures

Speed/minute is given. It isn't given by the hour or the shift. The FD800 runs 20 to 50 pcs/min. The FD1000 runs at 20 to 60 pcs/min. In that band, the actual output is located.

Where bag size and film are dictated. Bigger bags consume more film each cycle; therefore, they run at the lower end.

Both versions measure 8200, 1560, and 1550 mm. Both are 2.2 kW at 220 V/50 Hz. So either way, the floor space and wiring are the same.

What Bags Can the YF-FD Produce?

The YF-FD plastic film square bottom bag maker makes square bags. For a plastic square bag making machine, size is the useful way to judge fit, not the end product.

The FD800 is 800 mm wide by 700 mm long. The FD1000 is 1000 mm by 1000 mm. Both are upper limits. In that range are little bags.

Before selecting a model, compare the two numbers to your personal bag drawing. The bag fits the width limit but not the length limit.

Custom Square Bottom Bag Machine Options

Yunfeng states that square bottom bag machines may be built to order in numerous sizes and configurations. So the spec table is a starting point, not a fixed menu.

The quality of a bespoke square bottom bag machine quote depends entirely on the quality of the brief upon which it is based. Send the completed bag width & length. Add a kind of film. Indicate if the film is clear or printed. Tell me the width of the roll you purchased; it usually makes more of a difference than the machine.

Here, the order counts. Verify the bag drawing first. And then choose the model. Then choose the alternatives.

How the YF-FD Sits in Yunfeng's Bag Making Range

The YF-FD is one model within a broader range of bag making machines. Every model is built around a unique seal position or bag form. So the bag makes the decision, not the badge.

Buyers who require a different seal will typically look at the YF-BF Side Seal Bag Making Machine or the YF-HCWL Non-Tension Bag Making Machine. Roll bags YF-HJR Supermarket Fresh Keeping Bag Core Roll Bag Making Machine. The YF-HC2L Fully Automatic Double Layers Two Lines Hot Sealing Cold Cutting Bag Making Machine has two output points.

The Manufacturer Behind the Machine

Ruian Yunfeng Machinery Co., Ltd. was founded in 2001. It has spent more than 20 years in plastic machinery. The firm is based in Ruian, Wenzhou, in Zhejiang Province, China. Its production base covers 10,000 square metres.

Quality checks run from raw material buying through to finished product testing. Every step follows the same in-house standard. Ongoing development work has earned more than 10 national patents.

Products now reach over 60 countries. These include the United States, Mexico, Canada, Spain, Russia, Singapore, Thailand, and India. For a buyer, that record has a plain use. It usually means the export paperwork, packing, and shipping are already routine.

More background sits on the company profile and R&D center pages. Running footage is on the video center.

Installation, Warranty and After-Sales Support

Equipment is covered for 12 months from the delivery date, subject to contract. Inside that time, faults caused by product quality are repaired for free. Damaged parts are replaced for free as well.

Support goes past the warranty desk. Yunfeng provides on-site installation, setup, and operator training. So the line runs from day one, and staff learn the daily routine. Phone and video guidance cover common faults. Engineers are sent on site when a job needs hands on it.

After 12 months, paid service continues with original parts. Wearing parts and consumables are supplied long term. Regular checks can also be booked to stop faults before they start.

Service hours are Monday to Friday, 8:30 to 17:30. Full terms sit on the after-sales service page.

Frequently Asked Questions

What film does the machine use?

The YF-FD uses PE film. It is built for sealing and cutting PE film. No other material is listed for this series.

How fast is the square bottom plastic bag making machine?

The YF-FD800 runs at 20–50 pcs/min. The YF-FD1000 runs at 20–60 pcs/min. Real output depends on bag size and film.

What is the largest bag size?

The largest bag is 800 × 700 mm on the FD800. On the FD1000 it is 1000 × 1000 mm. Both figures are width by length limits.

• FD800: 800 mm wide, 700 mm long

• FD1000: 1000 mm wide, 1000 mm long

What power supply does it need?

Main power is 2.2 kW at 220V/50Hz on both models. The supply does not change between the FD800 and the FD1000.

How much floor space does it need?

Both models measure 8200 × 1560 × 1550 mm. Add room for the film roll, the operator, and finished bag collection.

• Machine weight: 2500 kg (FD800), 2800 kg (FD1000)

• Footprint is the same on both models

Can the machine be customised?

Yes. Different sizes and forms of square bottom bag machines can be built to order. Send bag sizes and film details with your enquiry.

What after-sales support is included?

Support covers a 12-month warranty from delivery, on-site installation and training, remote help, and long-term parts supply.

Conclusion

A square bottom bag stands or falls on its base. That base comes from the fold, not the cut. So fold accuracy, print tracking, and steady seal heat are the three things to check on any quote.

The YF-FD series from Ruian Yunfeng Machinery Co., Ltd. is worth a look for one reason. It puts size, speed, power, and footprint figures in the open. It backs them with a 12-month warranty and on-site setup. That lets you test the machine against your own bag drawing before you commit.

Send your bag width, bag length, film type, and print needs to request a quote. Yunfeng will confirm the model that fits and what can be changed.