Multifunctional Flow Wrap Machine
SW-350A · SW-450A · SW-550A
Horizontal flow wrap machine for regular solid products — biscuits, bread, candy bars, dates, soap, hardware, and more. Three models cover product lengths from 40 mm to 500 mm at up to 200 bags per minute. PLC and touch-screen HMI (brand options) with recipe memory.
Quality
CE Certified
Source
Factory Direct · Guangdong
Customization
OEM · Voltage · Language
After-Sales
2-Year Warranty · Lifetime Remote Support
SW-350A / 450A / 550A: Horizontal Flow Wrap for Solid Products
The SW-350A, SW-450A, and SW-550A are horizontal form-fill-seal machines that wrap individual solid products in a continuous pillow pouch. Film feeds from a roll mounted behind the machine, forms into a tube around the product on the infeed conveyor, and is sealed with end seals and a back seal — all in a single pass. The result is a tight, professional pillow bag produced at up to 200 bags per minute.
Unlike premade bag packing machines, the pillow pouch format requires no pre-formed bag supply; unlike collar type vertical FFS equipment, it suits products with a fixed, regular shape — biscuits, pies, bread, candy bars, soap bars, industrial parts, and paper boxes. Three models share the same mechanical platform; the only difference is the product size range and film width capacity. Choose your model by the largest product you plan to pack.
Standard equipment includes a PLC and touch-screen HMI (brand options) with recipe memory, and SUS304 stainless steel product-contact surfaces. Film compatibility covers OPP/CPP, OPP/PE, PET/PE, NYLON/PE, and plain PE rollstock.
Max Speed (SW-350A)
200 bags / min
Product Length Range
40–500 mm
Recipe Memory
100 products
| Parameter | SW-350A | SW-450A | SW-550A |
|---|---|---|---|
| Product Length | 40–140 mm | 120–450 mm | 120–500 mm |
| Product Width | 30–80 mm | 50–160 mm | 50–200 mm |
| Product Height | 5–30 mm | 10–80 mm | 10–100 mm |
| Max Film Width | ≤350 mm | ≤450 mm | ≤550 mm |
| Packing Speed | 20–200 bags/min | 15–70 bags/min | 15–70 bags/min |
| Bag Format | Pillow Pouch (horizontal flow wrap) | ||
| Control System | PLC + HMI Touch Screen (brand options) · recipe memory | ||
| Contact Material | SUS304 Stainless Steel | ||
| Film Material | OPP/CPP · OPP/PE · PET/PE · NYLON/PE · PE | ||
| Power | 3.2 kW | 3.2 kW | 3.6 kW |
| Voltage | 220V 50/60 Hz (customizable) | ||
| Machine Weight | ~500 kg | ~960 kg | ~1,160 kg |
| Dimensions (L×W×H) | 4,000×950×1,500 mm | 4,380×870×1,500 mm | 4,380×970×1,500 mm |
Recommended Configurations by Product
Each scenario below shows a typical configuration by product. The SW-350A handles small, fast-moving items; the SW-450A and SW-550A handle larger, taller products. Contact us with your product dimensions and target speed for a configuration recommendation.
Biscuits & Crackers
100 g retail sleeve pack
- Model
- SW-350A
- Infeed
- Manual or auto product placement
- Clients
- Biscuit manufacturers, bakery co-packers, export food processors
Bread & Pastry
Single loaf or muffin wrap
- Model
- SW-450A
- Infeed
- Conveyor belt with product spacing device
- Clients
- Bakeries, supermarket in-house packing, food OEM factories
Candy Bars & Confectionery
Individual chocolate or candy bar
- Model
- SW-350A
- Infeed
- Auto placement from cooling conveyor
- Clients
- Confectionery brands, candy OEMs, gift pack manufacturers
Soap & Industrial
Soap bar or hardware part
- Model
- SW-450A / SW-550A
- Infeed
- Manual placement or robot arm
- Add-ons
- Date coder, metal detector, checkweigher
The SW-350A/450A/550A series is designed for regular solid products only. For loose granules or powder, see the collar type packing machine family — including the multi-head weigher model (SW-420A), auger powder model (SW-420E), and liquid model (SW-420F). For premade pouches, see the premade bag packing machine family.
Output Bag Type: Pillow Pouch (Flow Wrap)
The SW-350A/450A/550A produces one bag format: the pillow pouch — also called a flow wrap bag or fin seal bag. Film wraps around each product on the infeed conveyor, a back (fin) seal runs along the underside, and end seals close the front and rear of each bag. No pre-formed bag supply is needed.
Dates — pillow pouch, fin seal back
Biscuits, bread, candy, soap, hardware
Pillow Pouch (Standard Output)
Fin Seal / Back Seal
Compatible film: OPP/CPP · OPP/PE · PET/PE · NYLON/PE · PE. Send your film sample for sealing parameter confirmation before production.
Note: This machine does not produce stand-up pouches, zipper bags, or flat-bottom bags. For those formats, see the SW-D premade bag granule machine.
How the Horizontal Flow Wrap Cycle Works
The entire wrapping process from film unwind to finished bag discharge takes less than one second at full speed. All steps run continuously — there is no stop-and-start motion on the product conveyor.
01
Product Infeed
Products are placed on the infeed conveyor — manually by one operator or automatically via a robot arm or product placement device. Lugs on the conveyor maintain equal spacing between products, which determines the bag length. A photocell detects missing or misaligned products and triggers an automatic skip cycle to prevent empty bags.
02
Film Forming & Back Seal
Film unwinds from the roll at the rear of the machine and passes over a forming shoulder that wraps it into a tube around the product stream. A heated fin seal wheel seals the two film edges together along the underside of the tube, creating a continuous back seal. The film pull ensures exact registration with the print mark on each bag.
03
End Sealing & Cutting
Rotary or reciprocating end seal jaws close across the film tube between each product, applying heat and pressure to form the front and rear seals of each bag simultaneously. A knife built into the jaw set cuts the sealed area to separate finished bags from the film tube.
04
Date Coding & Discharge
An optional date coder (inkjet or thermal ribbon) prints the production date, batch number, or expiry date on each bag as it exits the end seal station. Finished bags discharge onto the outfeed conveyor for downstream packing. The HMI panel stores product recipes.
Gallery & Video
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❯
SW-350A close-up front view — film forming shoulder, fin seal wheel, and end seal jaws
- SW-350A close-up front view — film forming shoulder, fin seal wheel, and end seal jaws
- Full machine factory view — complete infeed conveyor, film roll mount, sealing unit, and outfeed
- Labeled component diagram — key machine parts identified
- SW-450A full machine view — larger film width for bread, pastry, and long-format products
Four Core Mechanisms That Drive Reliability
Every SW-350A/450A/550A is built around four mechanical systems that determine packaging quality, film handling consistency, and uptime. Understanding these mechanisms helps you specify the right configuration for your product.
① Touch Screen Control
A 7-inch color HMI displays packing speed, sealing temperature, bag length, and fault codes on a single screen. Product recipes can be saved and recalled. Language and unit settings are configurable at the time of order.
② Multi-Linkage Roll Film Shaft
The multi-linkage film winding shaft coordinates film unwinding and film travel simultaneously, keeping tension consistent across the full speed range. Smooth film walk eliminates wrinkling at the back seal and reduces film waste at high speed — particularly important for printed or registered films.
③ Dual-Rail Material Handling Platform
Two side rails plus a center track guide each product through the forming collar without lateral shift. The rail spacing is adjustable for different product widths. This three-point support prevents fragile items — biscuits and soap bars — from tipping or jamming mid-run.
④ Rotating Constant-Temperature End Seal
The end seal jaw rotates at a constant temperature rather than cycling heat on and off. This delivers consistent seal strength at full speed and eliminates the cold-jaw problem that causes weak seals during start-up. The embossing pattern is standard; custom seal patterns are available on request.
Branded Components You Can Verify
Every critical component on the SW-350A/450A/550A is sourced from established industrial brands. Part numbers are listed on the quotation sheet so you can verify pricing and availability independently before you order.
Touch-Screen HMI (brand options)
7-inch colour touch screen. Stores product recipes. HMI language configurable: English, Spanish, Arabic, Russian, and others on request.
PLC (brand options)
Programmable logic controller. Coordinates film feed, sealing jaws, conveyor, and date coder in real time with fault diagnostics on the HMI screen.
Schneider Frequency Converter
Controls main motor speed for film feed rate adjustment. Smooth acceleration and deceleration protect film integrity at speed changes between product SKUs.
WINPARK Temperature Controller
PID temperature control for end seal jaws and back seal wheel.
Pillow Pouch vs Premade Bag — Which Machine Do You Need?
Both machine types produce sealed bags automatically, but they start from different materials and suit different products and production priorities.
Choose Pillow Packing (SW-350A/450A/550A) When:
- Your product has a fixed, regular solid shape that holds its form on a conveyor
- You need the lowest per-bag material cost — rollstock film is cheaper than premade bags
- You run high-volume single-SKU production (up to 200 bags/min)
- You pack biscuits, bread, candy bars, soap, or similar products
- You want a fast SKU switch without changing pre-formed bag inventory
Choose Premade Bag Machine When:
- You pack loose granules, powder, or liquid that cannot be conveyed on a flat belt
- You need stand-up pouches, zipper bags, or flat-bottom bags for retail display
- Your pouch requires pre-printed high-resolution graphics on all panels
- You run many small batches with frequent bag format changes
When This Machine Is Not the Right Fit
The SW-350A/450A/550A wraps individual solid products only. For loose granules, powders, or liquids, the correct choice is the collar type packing machine family — including the 4-head linear weigher model (SW-320C) and measure cups model (SW-320D/420D). For premade bags or stand-up pouches, use the premade bag packing machine family — including the granule model (SW-D200), powder model (SW-L200), and liquid model (SW-Y200). For spout pouches, see the spout pouch filling and capping machine (SW-CCS6).
Why Choose ShengWei Machine
Factory Direct from Guangdong
Designed and manufactured in our own 11,000 m² factory in Shantou, Guangdong. No trading companies, no middlemen — you work directly with the engineers who build your machine.
Built-to-Order Configuration
Voltage (220V, 50/60 Hz), HMI language (English, Spanish, Arabic, Russian, Portuguese, and more), infeed type, sealing parameters, and accessories are all configurable per order. OEM branding available for distributors.
Lifetime Remote Support
Free remote video technical support for the life of the machine — not just the warranty period. Common spare parts typically ship from our factory within 3 working days. On-site installation available on request.
80+ Export Countries
ShengWei machines are exported to 80+ countries, including markets in Europe, Southeast Asia, Africa and the Middle East.
Tested Before Shipment — How We Prove the SW-350A Series
Two-Day Run Test on Your Product
Every SW-350A Series wrapper goes through a structured Factory Acceptance Test before it ships. The test run takes two working days, with speed, seal quality, and rejection rate all logged. When a dosing unit is fitted, weight or fill accuracy is logged too. For a pillow wrapper, the test covers four checks. We tune servo synchronisation and cutter phasing to your product dimensions. Product lengths run from 40–140 mm on the SW-350A up to 120–500 mm on the SW-550A (full per-model ranges in the spec table above). We check fin- and end-seal quality on your film. We confirm format parts match your chosen model. Then we run acceptance at the speed and conditions agreed in the order (product, film, target weight, configuration). The catalog maximum is 200 bags/min for the SW-350A and 70 bags/min for the SW-450A/550A. It is not an acceptance figure for every product. Free sample test run on your own product and film: we send you the test video, usually within 2 working days of receiving your samples.
Approve Before We Crate
Before crating, our QC team sends you the FAT report, a test video of your machine running, and photos for approval. If your order requires it, we coordinate SGS, Bureau Veritas, or TÜV pre-shipment inspection and provide full access to the machine and test records. See how the 4-person QC team works at our Factory & Quality Center.
Frequently Asked Questions
What products can the SW-350A/450A/550A pack?
What bag types does this machine produce?
How do I choose between the SW-350A, SW-450A, and SW-550A?
What film materials are compatible?
What is the packing speed and what affects throughput?
What is the lead time and payment terms?
Can the voltage and HMI language be customized?
What warranty and after-sales support is included?
Do you provide installation and operator training?
Can I send a product sample for a packing test?
Expert Guides
What Is a Pillow Pouch Packing Machine?
How horizontal flow wrap machines work, what products they suit, and how they compare to vertical FFS and premade bag systems.
Read Guide →Seal Strength vs Seal Integrity
Why a strong-looking fin or end seal can still leak, which seal-integrity test finds what, and how the four sealing methods compare.
Read the Sealing Guide →How to Choose the Right Packaging Machine
A step-by-step buyer's path — product type, bag format, dosing, speed, and budget walked through in order.
Read the Choosing Guide →Other Pillow & Wrapping Machines
Different film paths and bag formats for snack and food products.
Film Beneath Feeding Pillow Machine
Film-beneath-feeding pillow machine. Bottom film path for products that need gentle top loading.
Three Servo High-Speed Pillow Machine
Three servo high-speed pillow machine. Rated up to 1,200 pieces/min for high-volume candy and snack lines.
Back Seal Vertical Packing Machine
Back seal vertical packing machine for granules. VFFS alternative when vertical bag format is preferred.
Ready to Discuss the SW-350A/450A/550A?
Send us your product dimensions, film type, and target output. We will confirm the right model and return a quotation within one business day.
info@shengweimachine.com · +86 181 2511 2025
Usually replies within one business day · Helps packaging buyers across 80+ countries
