How Induction Sealing Works
Induction sealing is a simple, elegant technology, the earliest form of which was patented in 1960.
The first step in the induction cap sealing process after filling the bottle or product container is to apply the induction seal to the product. This special seal consists of several layers, and is placed inside the cap or lid of the product. The typical layers of the induction seal are:
- The backing
- The foil layer
- The heat seal
When the product passes through the induction sealer, an electromagnetic field is created by the induction coil in the induction sealer. This electromagnetic field interacts with the foil layer in the induction seal and causes it to heat up through a process known as induction heating. As the foil layer heats up, it causes the heat seal to warm up as well, and causes it to melt. Then, as the product leaves the induction sealer and the heat seal cools, it adheres firmly to the container and creates a strong, reliable cap seal.
The seal created by induction sealing isn’t just powerful, it’s also efficient. Because of the simplicity of the induction sealing process and the quality engineering of Pillar products, our induction sealers are able to easily keep up with high throughput production lines. With equipment like our flagship iFoiler induction sealer and high-powered 4kW Unifoiler, you can easily seal 80+ products per minute, perfect for high speed, high output facilities in industries such as food and beverage.
A variety of additional equipment is available to improve the accuracy and efficiency of the cap sealing process.
The Pillar bottle and cap detection system greatly improves quality control by checking every container for a proper cap seal. The system uses a special photoelectric emitter and receiver which is able to “see” the presence of a cap and bottle. When this happens, special sensors are triggered to ensure that the induction seal and cap are in place, and properly sealed.
A Deluxe Stacked Indicating Light and alarm can be used to alert operators of loss of seal or over seal condition caused by insufficient or over power output by the induction sealer. This system provides both visual and audible alarms to alert operators of these conditions, preventing the shipping of unsealed products.
Additional coils are also available for your induction sealer, including Pillar’s patented tunnel coil. This specially-shaped coil is designed to accommodate tall or irregularly shaped caps, such as those used for dispensing glues and sauces.
These are just a few of the possibilities for additional cap sealing equipment. Pillar’s line of induction sealers and accessories ensures we are able to provide a product which not only meets but exceeds the operational needs of your production line.
Induction sealing is vital for a variety of industries with the need to seal plastic bottles and containers, including pharmaceuticals, food and beverages, automotive, and many more. With over 40 years of expertise in providing assistance to companies in these markets, Pillar Technologies is the ultimate resource for all your induction sealing needs.
If you want to join the thousands of companies that use Pillar Tech induction sealers, or have more questions about how induction sealing can benefit you, don’t hesitate to contact us or request a quote today.