How to Choose tablet granulation machine?

When manufacturing solid dosage forms, such as wet and dry granules for compression, effervescent granules, or (micro) pellets for the pharmaceutical, homeopathic, and food supplement industries, several criteria are significant when choosing the right manufacturing process. In addition to the requirements for the quality and quantity of the granules and their particles, the specific handling requirements of the respective active ingredients and excipients in terms of toxicity and sensitivity to factors such as light, moisture, heat, and oxygen, play an essential role. Finally, external factors such as budget requirements, space requirements, the need for flexibility regarding product changes and process options, efficiency (downtimes and process speed,) and staff availability are also critical. The article gives a short overview of common batch granulation techniques and compares different process options in the context of various criteria such as particle shape, size, distribution, and more. Process analytical technology options, that enable monitoring and ensuring product quality in real-time is are also discussed.

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Thus, the article intends to provide a decision-making aid for the right wet granulation manufacturing process.

Wet Granulation Processes

In pharmaceutical manufacturing, the primary objective of granulation is to create a stable dosage form. Therefore, the objective of a granulation process in oral solid dosage (OSD) manufacturing is to obtain a mixture with desired properties for subsequent steps such as pelletizing tableting, or coating. Components can include fillers such as lactose, cellulose, or mannitol; binders such as starch, or povidone; or disintegrants may be incorporated into the mixture in addition to the active ingredient.

Wet granulation can enhance flow behavior and compressibility, augment bioavailability, and facilitate greater homogeneity. An optimal system configuration with precise process analytical technology (PAT) makes wet granulation efficient and addresses challenges with the active ingredient or formulation.

The granulation process typically consists of a series of steps, including:

1. Mixing the raw materials
2. Spraying the granulating agent to disperse the liquid in the mixture
3. Building bridges between individual particles in the granulation phase. Particles are then compressed until the granulate, or snowball-like structure, is formed.

Depending on the targeted pharmaceutical product and its characteristics like the release and dissolution profile (e.g. standard tablet, effervescent tablet or pellets, powders, pellets of compression or encapsulation, etc.) as well as handling requirements granules must have specific properties e.g. type of fines content, particle shape, density, particle size distribution (PSD) are required.

There are several processing options for wet granulation and drying, each achieving specific granule characteristics. These technologies also differ in possible process range, degree of containment options, efficiency, flexibility, investment costs, space requirements, etc.

The following batch process options will be discussed:

• High-shear granulation plus several drying options
• Fluid-bed processing
• One-pot systeAndnd compared according to the criteria listed:

• Product Quality
• Flexibility
• Willingness to invest
• Space requirements

High-Shear Granulation Plus Drying

The high-shear granulation process is a well-established method for producing moist granules, which are subsequently dried. There are several ways in which mixer granulators can differ and these can affect a number of factors, including the quality of the granules, the mixing speed, homogenization, and cleaning.

An optimized high-shear granulator (HSG) bowl ensures homogeneous mixing and granulation of powdery raw materials. A precisely formed, bottom-driven mixing tool and an effective chopper placed in a conical-cylindrical shaped vat provide exceptionally good mixing results within just a few seconds and homogeneous moist granules. It also prevents product loss compared to the most top-driven variants. The moist granulate must then be dried — for example, in a tray dryer (TD) or a fluid-bed processor (FBP).

The different methods produce different results regarding respective granule properties.

• Fines content: The quality of the dry granules in combination with the TD has a higher proportion of fines, whereas the combination of an HSG with the FBP results in low to medium fines content.
• Density: The granulate density ranges either in the high to medium (TD) or in the high range (FBP).
• PSD: The Gaussian curve of the particle size distribution (PSD) is medium-ranged (HSG + FBP) or rather wider (HSG + TD).
• Shape: In terms of particle shape, HSG + TD achieves round to irregular shapes whereas HSG + FBP reaches rather round shapes.

The compressibility is good in both. Quantitatively, the yield is exceptionally good. The average product loss of the HSG + TD combination is around 1-3% slightly lower compared to the HSG + FBP variant, which is around 2-3%. However, the processing time in the HSG + TD combination is ≥ a factor of four in comparison to the combination of the significantly more efficient HSG + FBP processing. The absolute investment costs are correspondingly lower in the less efficient variant, but higher in productivity (costs per batch) compared to this and all other following processes discussed. Finally, high-shear mixers can be used for a broad range of materials and allow for several other process options like dry mixing (HSG), hot-melt granulation, and pelletization (with a respective spheronizer attachment); the combination with an FBD offers additional options like pellet coating in the FBD with a Wurster-Tube (bottom spray). The integration of an extruder completes the equipment to a pellet line.

High-shear granulation With Carrier Gas Vacuum Drying (One-Pot System)

The one-pot or single-pot system allows mixing, granulating, and drying in just one machine. Drying takes place under a vacuum. As the applied vacuum lowers the boiling point of the product less energy is required for heating. Drying can be initiated automatically after the granulation process. The dry granulate has a medium to high proportion of fines compared to the other methods and the granulate density is high. A medium to wide PSD is achieved, and the particle shape is round.

The fine content is in the medium to high range. Quantitative terms are very positive with a yield of >97%. The absolute and batch-related investment costs are in the medium range compared to the other methods (except for HSG + TD). Virtually all materials can be converted in the single-pot processor, and it is particularly suitable for solvent-based processes and environmentally sensitive products (e.g. effervescent granules). The advantage of a near-to-zero product loss makes it very suitable for expensive solvents and raw materials.

Further processing options are hot melt granulation and dry mixing.

Fluid-Bed Granulation

A fluid-bed processor allows mixing, different granulating options, and drying. Granulation takes place without mechanical force by spraying the fluidized product with binders. Compared to the high-shear method, the granule's shape is more porous and has a raspberry-like structure as well as a reduced particle size and bulk density. The PSD is somewhat more homogeneous and narrower.

The texture leads to improved dispersibility. Granulation can be carried out in two ways. In top-spray granulation, the spay application takes place above the product bed, in counterflow to the drying air. This results in higher spray drying losses compared to tangential spray granulation, in which the spray is applied laterally and directly in the product bed near the air distributor.

The spraying time can be reduced by around 30% by tangential spray processing while the spraying rate increases by around 30%. Despite these and other advantages, the top-spray application is still the most common of the two variants. Regarding the range of applications, it should be noted that fluidized bed granulation is not suitable for voluminous or cohesive base materials. Besides the further processing option of pure drying of moist raw materials, all other options are already stated above.

Process Analytical Technologies

For a more precise and efficient production (or development) quality-compliant process analytical technologies can be used. The main advantage of PAT is that it allows for measuring the state of a process without physically disturbing it by taking samples. It enables a timely characterization and analysis of raw or in-process materials by assessing their critical quality attributes in real time. Methods such as near-infrared (NIR), a spectroscopic method for in-line API quantification during fluidized bed granulation, belong to the range of PATs.

Most equipment suppliers also deliver PAT equipment and opportunities. A basic feature of a DIOSNA High-Shear granulator is comprised of software and a variety of measuring parameters. The validated program is capable of calculating a range of data and key figures derived from the measured values like temperature, the peripheral speed of the mixing tool, Froude number (needed for scale-ups), active power, total energy consumption, torque, and power curve inflection point. Should the adjustable maximum values for power and torque be exceeded, warnings or alarms are triggered, thereby advancing the mixing program. These values are used to determine the endpoint of the granulation process. To ensure product quality a probe allows detecting the particle size distribution inline, providing measured values in real time.

Machines can be prepared for the integration of a probe by analyzing further parameters like PSD, particle density, humidity, shape, etc.

PAT for FFBD includes options for the measurement and control of the inlet and exhaust air including temperature, volume, pressure, humidity, and more. Furthermore, the material bowl of the fluid-bed batch processor is prepared for NIR in-line-product moisture measurements, in-line detection of particle size, density,y and distribution, and more combining process and product analytical tools.

Investment

In general, the aim of the manufacturing industry is economic efficiency. Some critical points are among others:

• High-priced active ingredients & excipients
• High-priced solvents
• Investment costs
• Productivity costs
• Downtimes

Regarding the absolute investment costs, the combination of a mixer-granulator with a tray dryer wins the race. This variant is a good choice for handling inexpensive materials that require simple handling and a medium level of productivity. There are no containment options, and the environment as well as surroundings can influence the processes. Processing is simple and compared to the other methods only a little space is required in the technical zone.

The investment costs are highest for the combination of a high[1]shear granulator and fluidized bed dryer. On the other hand, the process flexibility is the greatest. So, if you want to use several process options — mixing, wet granulating, drying, granulating, pellet coating — this is the right choice for you, and there is also a variety of options in terms of granule quality, as described in Table 1. The flexibility is also reflected in the cleaning process. All individual process units and their surroundings must be cleaned, but this can be done alternately. This applies to non-containment operations.

Single-pot processors offer the highest product yield and even sticky materials can be processed very well thanks to an integrated wall scraper. The impeller is installed at the bottom of the mixing container, and a chopper is also attached vertically from the lid. These three factors lead to very good mixing and granulating results with excellent heat transfer and a particularly high product yield. It is ideal for more expensive products. Solvent recovery, such as methanol, can also be easily carried out using a condensate collection container. The flexibility in terms of process changes cannot be compared with the HSG + FBP combination. The quick and easy cleaning makes both processes immediately available. Even after containment applications, which are easier to use in a one-pot system.

Overall, processing in just one system reduces the incidence of errors compared to implementing different process steps in different devices. Fluidized bed granulating offers a similar advantage in this context. This is because space is only required for one device. Also, a lower ceiling height is required. The investment costs for the single-pot processor lie between the other two granulator combinations (+TD and + FBD). It requires fewer personnel for operation and cleaning.

Additional reading:
When to Use 1165S Vertical Machining Center？

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Conclusion

Solid dosage forms are widely used in various industries, such as pharmaceuticals, homeopathy, and food supplements. This includes tablets, effervescent granules, powder granules, and (micro)pellets. Maintaining high-quality standards, especially in terms of active ingredient bioavailability, is a constant challenge for the research and manufacturing industries. When choosing a process, several aspects must be considered. Ultimately, the decision will depend on the willingness to invest and the need for efficiency. This article compares different granulation processes and some of their various aspects. The multi-step process, which involves a high-shear granulator and fluidized bed processor, as well as the single-pot process, are safe, efficient, and flexible. If you require a high degree of flexibility and the use of individual processes, choosing a high-shear granulator and fluidized bed processor is a good option, if enough space is available. The single-pot process provides a straightforward and secure solution that is not affected by environmental factors and can be easily applied.

Author Details

Dr. Jessica Kyereme – Flaspöhler- DIOSNA Dierks & Söhne GmbH

Publication Details 

This article appeared in Tablets and Capsules Magazine: Vol. 22, No. 4September/October

In the ever-changing world of manufacturing, picking the right equipment can really make or break your production line—affecting both efficiency and the qualityof your products. Take Granulator Machines, for example—they’re pretty much the backbone when it comes to turning raw materials into uniform, consistent granules. This is super important across a bunch of industries, from pharma to plastics. Did you know that, according toMarketsandMarkets, the global market for these machines is expected to hit around $1.5 billion by ? That’s a solid growth rate of about 5.2% CAGR, which just goes to show how much demand there’s been for them lately. Here at Shanghai Tianhe Machinery Equipment Co., Ltd., we’ve been around since April , and honestly, we stand out because we use advanced mechanical processing gear—meaning we can produce nearly all parts ourselves, in-house. This gives us a real edge, letting us offer high-quality granulators that can meet a wide range of manufacturing needs. When you're trying to pick the best granulator for your operation, it’s not just about checking out technical specs. You’ve also gotta think about how it can help boost efficiency and keep your product consistent. Because at the end of the day, those are the goals you’re aiming for, right?

Understanding Granulator Machines: The Basics You Need to Know

Granulator machines are pretty essential in a whole bunch of manufacturing processes, especially when it comes to pharma and food production. Basically, they transform large amounts of raw material into smaller, more uniform granules or particles. This not only helps ensure consistent product quality but also makes the whole process run smoother and faster. If you’re in manufacturing, getting a good grasp of how these machines work is super important if you wanna streamline things a bit.

When you're picking out a granulator, think about what kind of material you'll be dealing with and what size of granules you need. Different machines are better suited for different stuff—whether you're working with dry powders or wet mixes. You also want to pay attention to how much the machine can produce at once, and how easy it is to keep it running smoothly. After all, nobody wants a machine that’s a pain to maintain!

Pro Tip 1: Always check if the machine will fit into your current production setup. It’s better to avoid those costly reconfigurations later on.

Pro Tip 2: Look for models that let you tweak the settings a bit—adjusting particle sizes and densities—that way, you can experiment and find what works best for different products.

Here at Shanghai Tianhe Machinery Equipment Co., Ltd., we’re all about providing high-quality granulator machines that match your specific needs. Our goal is to help you get the latest tech and dependable performance, so your manufacturing process runs as smoothly as possible.

Key Features to Consider When Selecting a Granulator Machine

When you're picking out a granulator machine for your manufacturing setup, there are a few key features you really wanna keep in mind — they can make a big difference in how smoothly everything runs. First off, think about the machine’s capacity, usually measured in kilograms per hour (kg/h). I recently came across a report from MarketsandMarkets, and it said that the global granulator market is expected to grow at about 5.1% annually between and . That’s mainly because more industries are starting to demand better and faster production. So, understanding how much you need to produce will help you pick a machine that honestly matches your goals without overdoing it or falling short.

Then, there’s the technology behind the granulator itself. Different technologies like wet granulation and dry granulation are suited for different materials and end products. For example, research from Grand View Research points out that dry granulation is really handy if you're working with heat-sensitive stuff — it helps avoid thermal breakdowns. Also, don’t forget to look into how easy the machine is to maintain and how flexible it is to operate. These little things can save you a ton of time and headaches during production. In the end, a good granulator isn’t just about quality — it’s about making your whole process more efficient and hassle-free, which is pretty much what we all want, right?

Different Types of Granulators and Their Applications in Manufacturing

When it comes to manufacturing, picking the right granulator can really make a difference in how efficient your process is and the quality of the final product. Granulators are super important because they break down raw materials into smaller, more manageable pieces, and there are different types out there, each suited for specific jobs. For instance, if you're working with plastics, a knife granulator is usually your go-to—it slices through materials with sharp blades, giving you consistent sizes perfect for recycling. Then there are high-speed granulators, which spin at crazy fast speeds to get things done quickly—these are great if you’re in a rush, like in film or fiber production. On the heavy-duty side, you've got granulators designed to handle tougher stuff like metals and rubber—they’re built tough so they won’t break down easily, which is crucial in industries like automotive or construction. Basically, understanding the ins and outs of each type helps manufacturers find the best fit, so they can boost productivity and keep the product quality high without too much hassle.

Maintenance Tips for Keeping Your Granulator Running Smoothly

Taking good care of your granulator machines isn’t just about ticking boxes — it’s key to keeping things running smoothly and making sure your equipment lasts longer. Doing regular maintenance can really cut down on unexpected downtime, boost efficiency, and help you save on repair costs. One thing you definitely wanna do is get into the habit of checking the machine regularly. Look out for any signs of wear and tear on the blades, screens, or other parts — replace them before something breaks unexpectedly.

And don’t forget about cleaning! Dust, debris, and leftover material can stack up and mess with how well the machine works. Setting up a cleaning routine and using the right Cleaning Products for what you process can make a huge difference — it keeps everything tidy without risking damage. Also, lubricating the moving parts is super important. Using the correct lubricants helps prevent overheating and keeps everything running smoothly.

If you make these simple maintenance steps part of your normal routine, you'll find your granulators are more reliable, more efficient, and less of a headache overall. It’s all about keeping things in good shape so you can focus on what really matters — getting your production just right.

The Ultimate Guide to Choosing the Best Granulator Machines for Your Manufacturing Needs - Maintenance Tips for Keeping Your Granulator Running Smoothly

Granulator Type Material Compatibility Output Capacity (kg/h) Maintenance Frequency Common Issues Rotary Granulator Plastics, Rubber 100-500 Monthly Bearing wear, Clogging hammer mill granulator Wood, Biomass 200- Weekly Overheating, Blade dullness cone granulator Pharmaceuticals, Chemicals 50-300 Daily Inconsistent particle size, Motor failure disc granulator Minerals, Fertilizers 100-800 Biweekly Binding agent issues, Wear and tear on disc

Cost-Effectiveness: Balancing Quality and Budget in Granulator Purchase

When you're choosing a granulator machine for your manufacturing setup, it’s really important to find that sweet spot between affordability and quality. I came across a recent industry report by MarketsandMarkets that says the global market for pelletizing and granulating equipment is expected to hit around USD 2.3 billion by . That clearly shows there's a rising demand for reliable and efficient granulation solutions out there. Basically, companies are getting more careful about their purchases — they’re not just looking at the initial price tag, but also thinking about how the machine will perform long-term, how durable it is, and how much it’ll cost to keep running smoothly.

Spending a bit more upfront on a high-quality granulator can actually save you money down the line. The same report points out that well-built machines can cut down maintenance costs by up to 30% and save about 20% on energy use. Of course, it’s smart to consider your specific production needs and budget when weighing your options. Sometimes, investing a little more in a top-tier machine pays off — it can improve performance, reduce downtime, and give you a better return on investment overall. Picking quality-focused equipment also helps ensure your machines can handle different materials and consistently produce the right particle size — which is super important for keeping up product quality and meeting regulations.

Overall, don’t just go for the cheapest option — think long-term, and prioritize durability and efficiency. It might seem like a splurge at first, but in the end, it’s totally worth it.

Common Mistakes to Avoid When Choosing a Granulator Machine

When you're in the market for a granulator machine for your manufacturing setup, it’s super important to watch out for some common missteps that could end up costing you time and money. One mistake I see quite often is not paying attention to the size of the materials you're planning to process. Honestly, knowing what kinds of materials you'll be working with, and their sizes, really changes the game when choosing the right granulator. Different machines are better at handling certain ranges, so picking the wrong one can lead to less-than-ideal results. For example, most granulators are great for reprocessing sprues, runners, and medium-sized parts—think particles roughly between 1/8” and 3/4”. It’s all about matching the machine to your material needs.

Also, don’t get confused about the difference between granulators and shredders. Both are used for size reduction, but they actually serve different purposes. Granulators are better if you need finer, more uniform particles, while shredders are for breaking down larger or tougher pieces. Picking the wrong type can really impact your productivity and the quality of your reprocessed materials. If you’re feeling unsure, chatting with manufacturers like Shanghai Tianhe Machinery Equipment Co., Ltd.—who specialize in mechanical processing equipment—can be a big help. They can guide you toward the best granulator for your specific needs, making sure you get the most efficiency and smooth operation out of your equipment.”

Maximizing Efficiency in Pharmaceutical Manufacturing with Stainless Steel Swing Type Laboratory Granulators

In the realm of pharmaceutical manufacturing, optimizing production processes is crucial for enhancing efficiency and ensuring product quality. One promising solution is the use of stainless steel swing type laboratory granulators. These machines utilize the rolling motion of a rotating barrel to granulate wet powder materials into uniform granules through a sieve. This method not only simplifies the granulation of mixed powders, which can later be compressed into tablets after drying, but also offers an effective way to handle agglomerated materials formed during production or storage.

According to a report by the International Pharmaceutical Excipient Council, the granulation process significantly impacts the bioavailability and stability of pharmaceutical products. The ability of swing type granulators to efficiently process materials ensures consistent granule size, which is essential for accurate dosing. Additionally, these granulators have applications beyond pharmaceuticals; they are versatile enough to handle candy and sugar mixtures in the food industry, as well as materials in ceramics and plastics. The customizable mesh sieve options allow users to tailor granule size to specific needs, further enhancing production versatility.

Embracing advanced granulation technology like stainless steel swing type granulators not only maximizes efficiency in the manufacturing process but also aids in adhering to stringent industry standards. As the pharmaceutical sector increasingly focuses on integrated solutions for production challenges, leveraging such innovative machinery stands as a pathway to improved operational performance and product reliability.

Stainless Steel Swing Type Laboratory Granulator

FAQS

: What are the main types of granulators used in manufacturing?

: The main types of granulators include knife granulators, high-speed granulators, and heavy-duty granulators. Knife granulators are ideal for plastics, high-speed granulators are designed for rapid processing, and heavy-duty granulators can handle tougher materials like metals and rubber.

How do knife granulators operate?

Knife granulators operate with sharp blades that slice through materials, making them perfect for recycling plastics and creating consistent particle sizes.

What industries typically use high-speed granulators?

High-speed granulators are commonly used in industries where time is of the essence, such as film or fiber production, due to their capability for rapid processing.

What maintenance practices can help keep a granulator running smoothly?

Key maintenance practices include routine inspections for wear and tear, maintaining cleanliness by implementing a cleaning schedule, and lubricating moving parts to prevent overheating.

Why is cleanliness important for granulators?

Keeping the granulator clean is crucial because the accumulation of dust, debris, and material residues can hinder the machine's performance.

How can investing in a high-quality granulator be cost-effective?

A high-quality granulator can reduce maintenance costs by up to 30% and energy consumption by 20%, leading to significant savings over time despite a slightly higher initial investment.

What should manufacturers consider when choosing a granulator?

Manufacturers should evaluate their specific production requirements, budget constraints, and the long-term operational efficiency and durability of the granulator options available.

What impact does granulator quality have on product quality and regulatory compliance?

Prioritizing the quality of granulators ensures that they can handle varying materials and achieve consistent particle size, which is essential for product quality and meeting regulatory compliance.

Conclusion

These days, manufacturing is all about keeping up with the times, and understanding how granulator machines work is pretty much essential if you wanna get your production running smoothly. In this little guide, we’ll go over the basics—things like size, capacity, and how efficient they are. We’ll also look at different types of granulators and what specific jobs they’re good for, so you can pick the right one for your needs without all the hassle.

Oh, and don’t forget—keeping your granulator machines in tip-top shape is super important for continuous, smooth operation. That’s why we’ve included some handy tips on maintenance, so you can avoid those annoying breakdowns. Budget-wise, it’s also key to find a machine that offers good quality without draining your wallet. And a quick heads-up: watch out for common mistakes when choosing your equipment, because those can really trip you up.

Here at Shanghai Tianhe Machinery Equipment Co., Ltd., we’re all about providing top-notch granulators and other processing gear to help manufacturers like you stay ahead of the game. We know how critical it is to have reliable equipment, and we’re here to make sure you get what you need.

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