The industry-standard snack packing line combines a multihead weigher (for fast, accurate weight batching) with a VFFS machine (for bag forming, filling, and sealing) — this pairing delivers the highest throughput and lowest per-bag cost for most snack categories.
Products Covered
This guide applies to the following snack and food product categories:
- Potato chips, corn chips, tortilla chips
- Popcorn (plain, caramel, flavored)
- Puffed snacks (cheese puffs, extruded snacks, rice cakes)
- Nuts and mixed nuts (whole, halved, roasted, flavored)
- Dried fruit (raisins, cranberries, mango slices)
- Trail mix and nut-fruit combinations
- Crackers and biscuits (broken/random shape)
- Candy-coated confections and chocolate pieces
Why Multihead Weigher + VFFS Is the Standard
A multihead (combination) weigher uses multiple weigh buckets arranged in a circle. By combining different bucket loads, it rapidly calculates combinations that match the target weight with high accuracy — typically faster and more accurately than single-head or volumetric systems for free-flowing, irregular products like snacks.
The VFFS machine below the weigher receives each weighed batch through a timing gate, then forms a bag from film, deposits the batch, and seals the bag — all in one continuous cycle. The combination delivers high output with consistent, accurate net weights.
Gentle Handling for Fragile Snacks
Breakage is a critical quality concern for fragile snacks like potato chips, prawn crackers, and puffed snacks. The weigher design directly affects breakage rate:
- Bucket design: Smooth, polished bucket surfaces and gentle bucket-to-bucket transfer minimize chip fragmentation
- Drop height: Minimizing the vertical drop distance from weigher to bag former reduces impact damage
- Timing gate: Gentle-action timing gates release product smoothly rather than dropping abruptly
- Elevator design: The product elevator feeding the weigher should be designed for low-impact transfer — bucket elevators or incline belt elevators with appropriate speed control
Nitrogen Flushing (Modified Atmosphere Packaging)
Nitrogen flushing — displacing oxygen in the bag headspace with nitrogen gas before sealing — is standard practice for premium snack brands to:
- Extend shelf life by preventing oxidation and rancidity
- Maintain crispness by preventing moisture absorption
- Provide cushioning to protect fragile chips during distribution
SunGene VFFS machines include a nitrogen flushing port and flow control as a standard option. Confirm your target residual oxygen level and gas supplier at the time of inquiry.
Bag Styles for Snacks
| Bag Style | Best For | Notes |
|---|---|---|
| Pillow bag | Chips, popcorn, puffs | Most economical; standard for value segment |
| Gusseted bag | Nuts, mixed snacks | Wider base; better shelf stability than pillow bag |
| Flat-bottom (block-bottom) | Premium nuts, dried fruit | Stands upright on shelf; strong retail presence |
| Quad-seal | Premium packaging | Four-panel bag; wide face for branding |
SunGene Snack Packing Lines
SunGene supplies complete snack packing lines including multihead weighers, VFFS machines, product elevators, and conveyors. All equipment uses SUS304 food-grade stainless steel on product-contact surfaces and is CE certified. Voltage is configurable to your local standard, factory-direct from Taiwan.
Explore our snack processing line, pouch packing machine, or browse all machinery.
Frequently Asked Questions
Which multihead weigher configuration is best for fragile chips?
For fragile snacks like potato chips, a radial multihead weigher with gentle-contact timing gates and a low-drop elevator is recommended to minimize breakage. Discuss your chip size and fragility requirements with our engineers at inquiry.
Is nitrogen flushing available for snack packaging?
Yes. Nitrogen flushing (modified atmosphere packaging) is a standard option for VFFS snack lines. The VFFS machine includes a gas flushing port and control system. Confirm your target residual oxygen level and gas supplier at inquiry.
What is the minimum bag size for snack packing?
Minimum bag size depends on the VFFS forming collar configuration. Contact SunGene with your minimum bag dimensions for confirmation.
What is the maximum output speed for a snack packing line?
Output speed is configurable and depends on the multihead weigher configuration, product characteristics, and bag size. Contact SunGene with your target bags-per-minute for a line design recommendation.
Are snack packing machines CE certified?
Yes. All SunGene packaging machines — including VFFS machines, multihead weighers, and snack processing lines — are CE certified to the Machinery Directive 2006/42/EC. A Declaration of Conformity is provided with each export shipment.