If you want a proven method to package your products safely and professionally, a blister packaging machine may be the perfect solution for you. These machines will help you pack items in plastic or aluminum blisters such that they are shielded from damage, moisture and tampering.
This guide will cover all the information you need to know about blister packaging machines – how do they work, what types are there, and how you can use them in your business.
What is Blister Packaging?
Blister packaging is a kind of packaging when products are sealed inside clear or transparent plastic or in an aluminum pocket (known as a “blister”) provided by a backing (a sort of foil, cardboard, or paper). You may have opened one yourself while purchasing medicine, batteries or small electronics.
Types of Blister Packaging Machines
Based on Forming Techniques
Thermoforming Machines
These machines soften a plastic sheet through heat. Then they mold it to little pockets by means of air or vacuum pressure. These pockets will contain your product, later, the machine will cover them with a backing – foil, paper etc.
Why You Might Choose This:
- Having the rapidity and the efficiency for large batches.
- Can work with a variety of plastic.
- Excellent for those items that don’t require extreme protection.
Cold Forming Machines
Cold forming machine doesn’t use heat. It instead takes aluminum sheeting and presses them into pockets through mechanical pressure. These aluminum sheet pockets provide excellent insulation from air, moisture and light.
Why You Might Choose This:
- Ideal for things that must be protected from light, air, and moisture.
- Perfect for medicines with a long-term storage.
- It is slower than thermoforming, but provides stronger protection.
Thermo-Cold Forming Machines
A thermo-cold forming machine has the ability to switch between heating and pressing techniques. This provides you the flexibility to either use plastic for fast jobs or aluminum for products that require strong protection – all on one machine.
Why You Might Choose This:
- Ideal if you operate according to different products.
- Make is easy for you to change materials.
- Provides speed and protection in a single machine.
Based on Machine Design
Flat-Plate Machines
Flat plate machines function by pressing two flat plates against each other where one surfaces the plastic or aluminum, and the other seals it with a backing material. The movement of these plates up and down will do the forming, sealing, and cutting. Since the motion stops at each step, this machine is slower but very precise.
Why You Might Choose This:
- Good for small or medium batches.
- Easy to control and adjust.
Rotary Machines
Rotary machines have rotating parts such as a big wheel that continues to move the material around from one step to another process continuously. This enables the machine to form, fill, seal, and cut blisters in continuous operation which is much faster than flat plate machines.
Why You Might Choose This:
- Great for big production needs.
- Faster than flat-plate machines.
- Most suitable for a company of high volume orders.
Based on Level of Automation
Fully Automated Blister Packaging Machine
A fully automatic machine takes care of everything for you. It will feed the materials, shape the pockets, put the product in, seal it, cut the packs and even reject the bad ones –without pausing nor much human assistance.
Why You Might Choose This:
- Ideal for large factories with high demand.
- Saves labor and boosts speed.
- Runs with little human supervision.
Semi-automatic Blister Packing Machine
A semi-automatic machine does most of the work but you are still needed to hand load or unload products. It’s slower than a fully automatic one, but it’s faster than doing everything manually.
Why You Might Choose This:
- Great for growing businesses.
- Provides a combination of speed and control.
- Less expensive than fully automatic machines.
Hand Operated Blister Packing Machine
This is the simplest machine. You do all the work by hand, putting the material, heating the sheet, adding the product, sealing the top, and cutting. It does not use motors and automation.
Why You Might Choose This:
- Perfect for testing new products or having small production batch.
- Low-cost solution for start-ups or labs.
- Simple to use and maintain.
Based on Specialized Features & Functionality
Table Top Blister Packaging Machine
This is a little portable machine that can be placed on a table or counter. It’s a mini edition of a blister packaging machine which saves space but works like larger machines on a smaller scale.
Why You Might Choose This:
- Perfect for labs or small workplaces.
- Ideal for low-volume or a sample production.
- Portable and easy to install.
Vacuum Blister Packaging Machine
Vacuum blister machines apply air suction (vacuum) to draw the plastic around your product tightly. This creates tight fitting, and this ensures the product is secure and in position.
Why You Might Choose This:
- Perfect for odd shaped or heavy things.
- Keeps your product in place.
- Provides extra protection.
Blister Card Packaging Machine
This machine puts plastic blisters over printed cardboard cards. It sticks together your product’s plastic cover with a card, where it is marked up with your brand and product descriptions. These you have seen in stores for products such as batteries or toys.
Why You Might Choose This:
- Perfect for retail products.
- Allows you to build your brand image with printed cards.
- Puts your product above others in a store.
Key Components
- Feeding System
This part feeds the materials and products into the machine. It can perform this automatically, or you could load it manually if you are using a smaller machine.
- Heating Station
If you’re dealing with plastic, then this station will warm it up to the level where it can be molded to make pockets. It warms the plastic to a non-destructive state enabling it to be laminated into product holders. The temperature is regulated cautiously, to ensure the plastic doesn’t burn or melt excessively.
- Forming Station
It is here where your soft plastic; or aluminum is pressed or formed into small pockets for your product. It makes pockets into which fit your product perfectly. It employs air, vacuum, or pressure to do this.
- Filling Station
Here, your product is put into the formed pockets. This can be done by hand or by an automatic feeding system which place each piece quickly and correctly.
- Sealing Station
A layer of foil, paper, or plastic seals the filled pockets of the machine. It uses heat and pressure to ensure that the seal is secure so that it keeps your product safe.
- Cutting Station
After sealing, the machine cuts the large sheet into smaller packs. It gets your packs to a correct size for shipping or selling. It can even provide easy-tear lines for customers who need packs to be torn off with ease.
- Inspection System
Some machines themselves have either cameras or sensors that can indicate your products in their rightful position and whether they are sealed or not. It checks your packs twice to ensure all is as it should be.
- Reject System
If the inspection finds a bad pack like a missing product or a bad seal, the machine can push it out of the line so that it wouldn’t reach your customers.
- Control Panel
It’s the nerve center of the system where you adjust everything. You will take the help of this touchscreen or button panel to set temperature, speed and pressure. It aids your management of how the machine operates.
Blister Packaging Machine Working Principle
Step 1: Feeding the Material:
First you place a roll of plastic or aluminum into the feeding system. The machine draws the material in and is prepared to shape it.
Step 2: Heating the Plastic (If Using Plastic):
If you’re dealing with plastic, heating station warms it until it’s soft and pliable, ready to be shaped.
Step 3: Forming the Pockets:
Then the machine molds the soft material into small pockets appropriate for your product. This is achieved using air, vacuum or pressing tools.
Step 4: Loading Your Product:
Now, your product finds its way into the pockets. This can be done manually of automatically, depending on your machine.
Step 5: Sealing the Packs:
Following product loading, the machine uses foil, paper or another plastic layer to cover the pockets. It is heat and pressurized to lock freshness and safety in.
Step 6: Printing (Optional):
Certain machines are printing batches no, expiry dates etc. on the backing stuff.
Step 7: Cutting the Packs:
After sealing, the machine makes the article into individual packs or strips. It can also make perforations so that people can tear off a pack at a time.
Step 8: Quality Check (if you have an inspection system):
Some machines ensure this using cameras or sensors, checking each pack to see that the product is in there in a perfect seal.
Step 9: Removing Bad Packs:
If the errant machine discovers pack that is bad, it ejects them from the line, ensuring they do not get to your customers.
Step 10: Collecting the Good Packs:
Finally, your good, sealed, and perfect blister packs are ready to collect, pack into boxes, and send to your clients.
Common Material in Blister Packaging
Alu-Alu Blister Packaging
In Alu-Alu blister packaging both front and back are formed from aluminum. It’s the best option if you want the light-proofing, moisture proofing, and air-proofing to be complete.
Ideal for medicines or commodity that requires a long shelf life and total protection.
Alu PVC Blister Packaging
The front is transparent plastic to allow the product visible to people. The back is aluminum protects from moisture and air.
Great if you’d like your customers to see the product at the same time it’s secured.
PET and Backing Boards Blister Packaging
The front is concealed with clear plastic while the printed cardboard or paper is on the back. This has been used for toys, batteries and small gadgets.
Perfect for retail products where your brand and product should be seen.
Other Material to use in Blister Packaging
Cyclic Olefin Polymers (COP):
Provides you with fantastic levels of moisture protection and it goes well with medical products.
Polychlorotrifluoroethylene (PCTFE):
Even better moisture resistance than COP, but it’s more expensive.
Polystyrene (PS):
Cheap, hard plastic that is used for items that are not that sensitive.
How to Maintain Blister Packing Machine
Check and Adjust Moving Parts Regularly
Parts such as forming plates sealing plates cutting tools should be fixed properly.
Once misaligned, your packs will not pack or seal right. This can be a waste of materials, and slow production.
What You Should Do:
- Inspect plates and rollers regularly.
- Make little changes to keep them straight and lined up.
- Tighten loose bolts or connections.
Monitor Heating Elements and Sensors
Your machine needs constant heating to form it and seal it right. If heaters or sensors break, you’ll have poor seals or damaged material.
What You Should Do:
- Test heat elements so that they will get to the desired temperature.
- Exchange any overheating heaters or sensors as soon as you detect temperature problems.
- Check sensors often to prevent overheating, or under heating.
Maintain air pressure systems (if using pneumatic parts)
If air pressure is used in your machine to form blisters or move parts air leaks, or low pressure, can result in weak forming or machine error.
What You Should Do:
- Inspect air hose, valves, and cylinders for leaks or damage.
- Change air lines which are worn or cracked.
- Regulate the pressure settings according the settings of the machine.
Lubricate Mechanical Joints and Bearings
Joints, bearings and chains do not rest at all when they are in operation. If they dry out or wear excessively, your machine may jam or break.
What You Should Do:
- Lubricate all moving parts with suitable lubricant.
- Inspect the metal wear, or abnormal noises.
- Change worn bearings or gears when necessary.
Inspect Sealing Pressure Systems
If hydraulic/mechanical pressure is used in your sealing station, ensure that this pressure is distributed evenly over the pack.
Variations in pressure can result in poor sealing, or damage to product.
What You Should Do:
- Check pressure systems for leaks or wear.
- Regulate pressure by thickness of material.
- Replace faulty valves or pressure regulators (faulty valves = faulty pressure regulators).
Maintain Electrical and Control Systems Healthy
The entire machine is run by your control panel, sensors and your automation systems. Electrical faults will cease production or commit an error.
What You Should Do:
- Inspect wiring for damage or loose connections.
- Update software if your machine is digital control (PLC. or HMI).
- If the machine has this feature, run system diagnostics.
Replace Worn Tooling on Time
Molding tools, sealing tools and cutting knives wear out with use. It may ruin your packs or even damage the machine using worn tools.
What You Should Do:
- Check these parts periodically for cracks or worn-edges.
- Prevent tools from affecting product quality by replacing them.
- Maintain extras of tooling on your premises to minimize downtime.
Common Problems with Blister Packaging Machines
Variation in material thickness
You can see that the plastic/aluminum you’re using in that place is too thick in some places and too thin in others. This makes it difficult to create good blisters for packaging or their closing.
What Causes It?
- Your material roll may be low quality or damaged.
- The settings of tension on the machine may not be right.
- The uneven pulling of the feeding system may be occurring.
What You Can Do:
- Report to the material supplier over problems in quality.
- Modify the tension of your machine.
- Ensure it feeds smoothly and evenly.
Products missing in some cavities
Some of your blisters come out empty, without the product inside.
What Causes It?
- The feeding system is jammed / or not picking products up correctly.
- The product alignment is incorrect; therefore, the feeder misses certain pockets.
- There may be a timing problem between putting together and feeding.
What You Can Do:
- Inspect and adjust your product feeder.
- Make sure before loading the products are placed in the correct alignment.
- Recheck the machine’s timing settings.
Inconsistent sealing
You sealed packs either do not seal properly or have weak spots through which air or moisture can get in.
What Causes It?
- The temperature is either too low or too high in the sealing station.
- There is an uneven pressure over the sealing area.
- The sealing plates are worn / dirty.
What You Can Do:
- Change the setting of the temperature and the pressure of the sealing.
- Inspect sealing tools for wear or damage.
- Wipe down the sealing plates and if necessary replace.
Benefits of Blister Packaging
- Product Protection: Blister packs protect from moisture, dust & damage to ensure that you can deliver clean, safe products to your customers always.
- Tamper Evidence: Blister packaging displays evidence if a person attempts to open or defeat the product on behalf of the customer hence enhancing security and customer confidence.
- Extended Shelf Life: It prevents air, light, and moisture – so sensitive items, such as medicines or food remain fresh for a longer time.
- Customer Convenience: Blister packs are easy to get open and carry whereas the customer can store them easily, so it makes the customer’s experience enjoyable and must include in the package.
- Cost Efficiency: Blister machines use the material highly effectively minimizing waste and giving you packaging cost at a lower rate compared to other methods.
- High Production Speed: Automated blister machines produce large volumes in a hurry and thus serve best per high demands in the market.
- Brand Visibility: Blister cards are available for you to print logos as well as details of a product – thus making the product stand out on shelf on retail stores.
Applications Across Industries
- Pharmaceutical Industry
Blisters packing is ideal for those who prepare tablets, capsules or medical devices. It ensures medicinal products are dry, clean and tamper proof and the patients receive the correct amount.
- Food Industry
If you sell spices, chewing gum, supplements, or small snacks, blister packs are helpful to you because they ensure single use portions. They make your food fresh, clean easy for your customers to take.
- Electronics and Consumer Goods
With the products like batteries, earbuds or small accessories, blister packaging will keep everything safe for displaying. Customers can view the product while knowing it hasn’t been touched or messed with.
- Cosmetics and Personal Care
Blister packs are fantastic for samples, creams cosmetics accessories and single use of beauty products. They enable you to provide secure, hygienic packing your customers can trust.
Conclusion
Blister packaging machines are a good idea if you need protection for your products, faster production, and better products’ appearance on shelves. Whether you’re in pharmaceutical, Food, electronics, or cosmetics, these machines mean cost-effective, secure and professional packaging.
Once you understand how these machines operate, how to keep them in good condition, and how they can be used in your production line, you’ll get a lot of value from what you invest in.
At SaintyCo, a wide range of packaging options for pharmaceutical products – ask for more information about our blister packaging solutions.
FAQ’s
How does blister packaging enhance product security against tampering and counterfeiting?
Blister packs keep your product safely closed, at the same time anyone can easily detect if someone opened or tampered with the product prior to usage.
How do blister packaging machines accommodate different product sizes and shapes?
Yes. You may edit settings of the machine, as well as apply different tooling to accommodate products of different shapes and sizes.
How can blister packaging machines be integrated into existing production lines?
Yes. Most machines have control systems that allow you to connect these to your upstream and downstream devices for seamless automated production.
More resources:
Blister Thermoforming Machine Working Principle – Source: CAPSULEFILLER
