Large-Head Continuous Induction Sealer (30–150mm Caps)
The SUNAURA large-head continuous induction sealer is built for oversized and wide-mouth containers. A 4500W generator matched to a large flat sealing head covers caps from Φ30 to 150mm, and a tall column accommodates containers up to 600mm high — large jars, tubs, cans, and wide-mouth pails that smaller heads simply cannot reach.
Product Description
The SUNAURA large-head continuous induction sealer is engineered for packaging lines whose SKUs include big wide-mouth containers. A 4500W high-output generator drives a large flat sealing head matched to caps from Φ30 up to 150mm. That power is necessary: sealing a wide circle of foil evenly demands more RF energy than a narrow neck, and under-powering a large head produces weak, patchy seals.
The tall column accommodates containers up to 600mm high, so the machine covers large honey buckets, wide cosmetic tubs, food cans, composite pails, and industrial lids that ordinary sealers cannot reach. Because one platform spans the whole 20–150mm range, buyers with mixed wide-mouth SKUs can seal the entire assortment on a single machine instead of running two or three heads.
It is a continuous-conveying, air-cooled floor-standing unit built with a stainless-steel and aluminum frame and an included conveyor. This is the model machine buyers specify when wide packaging is non-negotiable. Every unit is CE certified and backed by a 12-month warranty and lifetime support from our Qingdao factory.
Technical Specifications
| Model | SNA-LHS45 (Large-Head Wide-Range Series) |
|---|---|
| Sealing Method | Electromagnetic induction, non-contact, continuous conveying |
| Power | 4500 W (high output) |
| Voltage / Frequency | 220 V, 50/60 Hz |
| Sealing Diameter | Φ20–150 mm (large head; 30–150mm standard range) |
| Conveyor Speed | 6–18 m/min, adjustable |
| Max Container Height | 20–600 mm |
| Cooling System | Air-cooled, floor-standing |
| Conveyor | Continuous conveying belt included |
| Body Construction | Stainless steel + aluminum |
| Net Weight | 80–120 kg (configurable) |
| Certification | CE Certified, ISO 9001 factory |
Key Features & Benefits
- Large Sealing Head Φ30–150mm (20–150mm configurable): Covers everything from standard caps up to very wide lids — one machine for your whole wide-mouth range.
- High 4500W Output for Wide Foil Areas: Delivers enough RF energy to heat a large foil circle evenly, avoiding the weak, patchy seals that smaller generators produce on wide lids.
- Very Tall Container Window up to 600mm: The tall column clears large jars, buckets, tubs, and tall cans that would not fit under a standard-height head.
- Air-Cooled Floor-Standing Design: Self-contained air cooling needs no water circuit, keeping installation simple for wide-container production.
- Stainless-Steel + Aluminum Frame: Corrosion-resistant build suited to food, cosmetic, and chemical environments.
- Continuous-Conveying Work Mode: Jars and tubs ride the included conveyor through the head hands-off at 6–18 m/min.
- Wide-Adjustment Column: The head positions up and down and fore-aft to match mixed container heights and cap sizes without tooling swaps.
- Factory-Direct & CE Certified: Built in our Qingdao plant, backed by a 12-month warranty and lifetime technical support.
Application Industries
This machine is specified when wide-mouth packaging — large jars, tubs, cans, and pails — is part of the product range.
Food — Large Jars & Sauces
Large honey jars, sauce tubs, and condiment cans — hermetic foil seals prevent leakage and extend shelf life.
Cosmetics — Wide Tubs
Creams, body butters, and hair masks in wide-mouth tubs — protects against drying out and leakage in transit.
Chemicals & Pails
Industrial liquids, lubricants, and wide-mouth chemical containers — leak-proof sealing for safe handling.
Agrochemicals
Liquid fertilizers and agrochemicals in wide pails — tamper-evident, spill-safe seals for distribution.
Composite Cans & Large Containers
Wide-mouth composite cans and large non-metal tubs up to 600mm tall — formats smaller heads cannot seal.
Container Types
Seals plastic (PET / HDPE / PP), glass, and composite wide-mouth containers up to 150mm lids and 600mm tall.
How Induction Sealing Works
The principle is the same non-contact electromagnetic bond, but wide lids demand more energy. On this large-head unit the cycle runs as follows:
- Large capped containers feed under the head. Wide-mouth jars, tubs, or pails ride the conveyor beneath the large flat RF sealing head at a controlled speed.
- 4500W field heats the wide foil evenly. The high-output generator induces eddy currents across the full diameter of the aluminum foil, heating the entire large disc almost at once.
- Wax melts and film bonds across the wide rim. Heat melts the wax into the pulp while the heat-seal film fuses around the full circumference of the wide container mouth.
- Cap removed, wide foil seal remains. Unscrewing the large lid leaves the pulp in the cap and the broad aluminum disc bonded to the rim — unmistakable tamper evidence.
- Air cooling sustains wide-head output. Forced airflow keeps the 4500W generator stable so the wide head keeps delivering full heating across the run.
How to Choose the Right Large-Head Sealer
This is the right machine when your packaging genuinely includes wide-mouth formats. Confirm the fit with these four checks:
- Measure your widest cap and tallest container. If your largest lid is up to 150mm and your tallest container up to 600mm, this head covers it. If all your necks are narrow, a standard or beverage model costs less.
- Confirm you need the 4500W power. Wide foil needs high wattage to heat evenly. Trying to seal 120–150mm lids on a low-power head causes weak edges — size the power to the widest lid, not the average.
- Plan conveyor and line height. Large jars and pails are heavy and tall; verify the conveyor load rating, your floor space, and line direction. The wide-adjustment column must clear your tallest SKU.
- Match duty cycle to air cooling. Air cooling suits production with normal pauses. For non-stop 24/7 wide-lid sealing, ask us about water-cooled high-power options.
Troubleshooting Guide — Common Issues & Solutions
Wide-head sealing has its own failure modes because large foil areas need more energy. Below are the most common issues on this model, their causes, and fixes. Always disconnect power before inspecting the sealing head.
| Problem | Possible Causes | Solutions |
|---|---|---|
| Weak seal around the foil edges | Conveyor too fast for wide foil; head gap too large; output not high enough for the lid size. |
|
| Center seals but edges do not | Uneven field across large head; lid not parallel to head; foil liner too thin at rim. |
|
| Tall containers hit the head | Head height not raised; container exceeds the 600mm window; tall lid tipping. |
|
| Overheat trip under wide-lid load | High 4500W continuous load; blocked fan; hot ambient room. |
|
| Heavy jars wander on the conveyor | Conveyor load too light for heavy pails; guides too narrow; belt tracking off. |
|
| No heat on large foil | No RF output; loose head cable; non-induction liner; container off-center. |
|
If the issue persists after these steps, contact our engineers at [email protected] with photos and a short video — we usually diagnose the root cause within one business day.
Frequently Asked Questions
What is the widest lid this sealer can handle?
The large head covers lids from Φ30 up to 150mm (with a configurable 20–150mm range). That includes large honey buckets, wide cosmetic tubs, food cans, and industrial lids. Send us your largest container and lid sample and we will confirm the exact head configuration before you order.
Why does this need 4500W when other sealers use less?
Sealing a wide circle of foil requires far more RF energy than a narrow neck. A low-power head on a wide lid produces a seal that holds in the center but weakens at the edges. The 4500W generator heats the full foil disc evenly so the whole circumference bonds to the rim.
How tall a container will it fit?
The tall column accommodates containers from 20mm up to 600mm high. That is what sets it apart from standard-height sealers — it clears large jars, buckets, and tall tubs that would collide with a lower head. The head adjusts vertically and fore-aft for mixed SKUs.
Is it air-cooled or water-cooled?
This floor-standing model is air-cooled, so it needs no water supply, drain, or chiller — just a 220V outlet and ventilation. It suits wide-container production with normal pauses. If you run non-stop 24/7 on the widest lids, ask us about our water-cooled high-speed platform.
What is the warranty and lead time?
Every unit carries a 12-month warranty on parts and labor plus lifetime technical support by email, WhatsApp, and remote video. Standard large-head models ship in 7–15 days, custom configurations in 20–30 days, and spare parts are dispatched worldwide within 48 hours.
Why Buy From SUNAURA Machinery
48,000㎡ Own Factory
In-house manufacturing in Qingdao, China — no middlemen, no trader markup.
CE Certified
All machines meet European safety standards with full documentation.
ISO 9001:2015
Quality management system certified across the entire production process.
SGS Audited Factory
Third-party audited manufacturing facility with 20+ national patents.
12-Month Warranty
Full warranty covering parts and labor from the date of shipment.
Lifetime Support
Technical guidance via email, WhatsApp, and remote video for the machine’s life.
Spare Parts in 48h
Genuine parts shipped worldwide via DHL/FedEx within 48 hours.
100+ Countries Served
Trusted by packaging lines across food, pharma, cosmetics, and chemicals.
Get a Factory-Direct Quote in 24 Hours
Send us your widest lid, tallest container, and daily output — our engineers reply with a model recommendation, price, and lead time within one business day. Every machine is built in our 48,000㎡ Qingdao factory, CE & ISO 9001 certified.
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