Your Ultimate Guide to Tube Sealing Machine

tube sealing machine

Tube Sealing Machine

 

The tube sealing machine is a vital piece of machinery in the packaging sector, used to seal aluminum, plastic, and laminate tubes.

Get all your questions about tube sealing machines—their working principles, uses, and what to look for in a good one—answered here. In this article, we provide detailed information about tube sealing machines for you.

What is tube sealing machine?

One piece of industrial machinery that can seal tubes made of various materials including aluminum, plastic, and laminate is the tube sealing machine. Its application ensures the quality and safety of products by closing or sealing tubes precisely.

There are semi-automatic and fully automatic tube sealing machines available to suit varying production demands. Although the sealing procedure is automated with semi-automatic sealers, operators still need to manually load and unload tubes. Machines that can do it all automatically, without any human input, are ideal for mass manufacturing.

Tubes filled with ointments, sauces, creams, and industrial chemicals are produced by this equipment, which finds extensive use in the food, cosmetic, pharmaceutical, and chemical industries. By permanently joining the layers of a tube, tube sealers guarantee that the contents will stay pure.

Features

  • Panel of control with a touchscreen
  • Tube loading and placement, either manually or automatically
  • Retractor for pre-filling tubes
  • Automatic tube alignment by use of a specialized sensor reading a mark
  • Use of various advanced closure or sealing systems
  • Press batch printing
  • Welding finishing cutting system
  • Customized format for tubes with varying diameters upon demand

Types

If you need to seal a tube made of a different material, there are a number of options available. This includes using pressure, heat, or ultrasonic vibrations. Differences in capacity and production needs determine the degree of automation, which may be semi-automatic or fully automatic. Important factors to think about are the material of the tubes and the result you want. There are primarily:

Semi-Automatic Tube Sealing Machine Manual loading and unloading of tubes is necessary with the automatic technique of sealing. Ideal for lower-volume manufacturing.
Fully Automatic Tube Sealing Machine To achieve fast, high-volume manufacturing, the whole sealing process, including the loading and unloading of tubes, is fully automated.
Ultrasonic Sealing Machine For tubes made of aluminum-plastic, laminate, and plastic, high-frequency vibrations may form a strong bind without the need for heat.
Hot Air Sealing Machine In plastic tube sealing, you may fuse polyethylene, polypropylene, and plastic tubes using the heat from the air.
Induction Sealing Machine The electromagnetic field creates a vacuum by heating the aluminum and aluminum-plastic tubes, which then seal together.
Hot Jaw Sealing Machine Aluminum, plastic, and laminated, tubes are just a few of the many materials that may be sealed using heated jaws.

Tube Sealing Machines: how do they work?

In order to seal tubes properly, tube sealing equipment carry out the following steps:

1. Tube Loading or Tube Feeding

Fully automated sealers load tubes automatically through a feeding mechanism, whereas semi-automatic devices load them manually.

2. Tube Positioning

An important step for tubes marked with particular information is that the machine positions them appropriately for sealing.

3. Sealing

To form a hermetic seal, this sealing machine uses either heated jaws, induction, ultrasonics, or hot air.

4. Trim & Cooling

The bond is strengthened by removing excess material and then cooling the sealed part of the tube.

5. Batch Code

System integration allows for the printing of production information.

6. Inspection

Checking the quality of the seals.

7. Tube Discharging

To go to the next level, users of semi-automatic machines remove tubes, while those of fully-automatic machines use feeding systems.

Tube Sealing Techniques

Hot Air Sealing

This is the most preferred for sealing plastic and laminate tubes because of its speed and versatility.

Hot air seals are perfect for displays. Apply hot air to the capless plastic or laminate tube to seal. The plastic tube bends when hot air heats the inside. The tube next goes to the closure station, where chilled sealing jaws with cold water pinch it close. 

The issue with hot air sealing is replacing extra parts. Different filling tube sizes need different components.

High-Frequency Sealing

A microwave oven cooks food with high-frequency sealing. An eddy current is generated by the aluminum layer between two electrodes. The seal material is heated between the electrodes. As the temperature rises to melting, the pressure keeps the seal tight. High-frequency sealing takes longer and only works on aluminum laminate tubes.

Ultrasonic Sealing

Ultrasonic sealing horns vibrate at high frequencies to seal plastic and laminate tubes. The seal-side plastic tube melts from vibration. The end holds until the sealing horn and anvil seal and cools the tube. Ultrasonic tube sealing is slower than hot air or HF sealing but needs fewer parts and may seal with product contamination. Ultrasonic seals lack gloss compared to hot air sealing.

Hot Jaw Sealing

Hot jaws seal tubes by applying heat and pressure to the exterior using crimping jaws. One way is to heat the inner tube walls from the outside. Use crimping jaws to shut the tube. Hot Jaw sealing is less efficient and takes longer to seal tubes. 

Metal Sealing

Crimping stations flatten and fold metal tube ends to seal. Tube sealing concludes with pressing. Metal tubes seal with saddle, double, triple, or single folds. Metal tube folding procedures lead to varying seal strengths based on product viscosity and preferences. Consider the diameters needed for tube folding when ordering tubes from the provider.

Applications

Countless items are sealed using tube sealing machines in a variety of sectors. Below are a few examples of the most typical uses:

Food

For the purpose of enclosing herbs and spices, pastes, spreads, and sauces in tubes.

Personal Care

Useful for securing the seals of personal care products including toothpaste, shampoo, and conditioner.

Cosmetics

For use in sealing tubes of topical cosmetics such as ointments, gels, creams, and lotions.

Pharmaceuticals

Excellent for sealing dental care products, ointments, and lotions.

Chemicals

Packing sealants, adhesives, and industrial lubricants—among other chemical products—in tubes for storage.

Maintenance

If you want your tube sealing machine to last as long as possible and work as well as possible, you must maintain it regularly. To maintain your equipment running well, follow these guidelines:

1. Machine cleaning routinely

After sealing, wipe off any residue by wiping off the outside surfaces.

2. Regular condition inspection

When necessary, repair worn components such as sensors, sealing jaws, cylinders,  etc.

3. Oil the moving components

To keep bearings, gears, and chains from wearing out too quickly, lubricate them.

4. Monitor electrical and pneumatic systems

Check the electrical and pneumatic systems to make sure they are working properly and address any problems as soon as possible.

5. Regular maintenance plan

For more efficient operations, be sure you follow the manufacturer’s plan for testing, positioning, and software upgrades.

Common Usage Issues

Among the potential problems that could arise when using tube sealing equipment are:

1. Uneven Sealing

Seals may be weak or uneven if the sealing condition, pressure, or dwell duration is insufficient.

2. Misaligned Tubes

Displaced tubes might cause off-center sealing or print that isn’t perfectly aligned.

3. Excess cutting

If you cut too much, the seal will be compromised, and the product will leak.

4. Unproductive changeover

Long changeover periods have the potential to lower output.

Troubleshooting Common Issues 

The following are some of the most typical issues with tube sealing machines, along with solutions:

Leaked Sealing

Before sealing any material, make sure the heat seal bars are adjusted to the appropriate temperature. For an effective seal, the ideal temperature must be met.

It is important to clean the heat seal bars as well. Leaks might be from dirt, dust, or grease. Check the jaws’ and the crimping mechanism’s mechanical functioning directly. You may have to change or alter certain parts.

Irregular Sealing

Grease and grime on the heat seal bars might lead to uneven sealing. Make sure to clean the bars well.

Inspect the proper alignment and even closure of the crimping jaws. Make any required adjustments or replacements. Check the tubes for any flaws or abnormalities; the surface can be uneven.

Low Speed

A loose drive belt might be the problem. Check the belt and make any necessary adjustments or replacements.

Ensure that the driving mechanisms are free of damage or signs of worn gear teeth. Patch up those old gears.

A shorter heat-up time might be the result of worn-out heating parts. Evaluate and swap out affected parts.

Non-Heating Machine

For any signs of rust or dangling wires, inspect the electrical connections leading to the heating components. If necessary, adjust or replace.

To check whether the heating components are defective, you should test them individually. Fix or replace any broken parts.

Make sure the temperature controller is working properly. If it’s needed, replace it.

What to consider when buying a tube sealing machine?

If you want to get the best tube sealing machine, you should think about these things first:

Suitability of materials

Whether you’re using plastic, laminate, metal, or a combination of these materials, you’ll need a machine that can seal tubes.

Efficiency

Select a semi-automatic or fully automatic sealer according to your production requirements.

Sealing Technique

Depending on the material of the tube and your preferred seal strength, choose between induction, hot jaw, ultrasonic, or hot air sealing.

Price

Make sure you consider the price, upkeep, consumables, and components when calculating the optimal deal.

Simplicity

Choose an easy-to-operate device that comes with accessible assistance and replacement components.

Machine Incorporation

Make sure the sealer is compatible as well as easy to integrate with tube filling machines if you’re adding it to an existing production line.

Conclusion

By securely bonding tube layers, tube sealing machines protect what’s inside of tubes made of various materials. You may choose between fully automated and semi-automated equipment based on your production requirements. In general, tube sealing offers packed items within tubes dependability and security.

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