The V-type blende r is used to produce homogeneous solid-solid mixture . Mixing is a common process step in the manufacture of products for industries such as food, cosmetics, pharmaceutical, chemical, detergents, fertilizers and plastics. Examples of materials or substances mixed in this way include pharmaceuticals, flour for confectionery, fish meal, refined or white flour, whole wheat flour, flour for coating, dextrins, enzymes, coffee, cocoa, milk powder, chocolate, gelatine, crème caramel and dessert powder, baby food, custard powder, starches, seeds, pigments, colorants, cosmetics, powdered or granulated plastics, fiberglass, etc.
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The unit consists of two cylinders arranged in a "V" shape with an angle of 80°. A manually actuated inspection and loading port is provided at the end of each cylinder, allowing access to its interior. The product outlet is located at the point where the two cylinders are joined and is fitted with a manually or automatically actuated butterfly valve. The geared motor and the bearing system are located within the lateral supports holding the blender body.
The solids are introduced into the blender through the loading aperture. The mixing performance is of 50%, that is, with each turn of the blender, the product located in the two cylinders moves into the central common section, and this is repeated continuously. The speed is not high, which makes this unit especially suitable for products that need to be
maintained cold.
The mixture is discharged through a hermetically closing butterfly valve which can be operated manually or automatically.
The unit is provided with a guard rail with electrical safety to prevent the operator from accessing it when in operation. If anyone should gain access to the unit, for safety reasons, the operation will cease.
The series consists of 10 models with a total capacity of 50 to litres and a useful capacity of 50% of the total.
Mixing times vary between 3 and 15 minutes depending on the mixture.
The unit incorporates a guard rail with electrical safety, according to EC safety standards. The unit is manufactured in AISI 316 (EN ) quality for all parts in contact with the product and AISI 304 (EN ) for the supports and the rest of the equipment. The internal and external surfaces have a bright polished finish. Due to the polished surface and absence of edges or corners, the unit can be easily cleaned either manually or automatically with CIP system.
Parts in contact with the product AISI 316 (EN )
Structure and other metal parts AISI 304 (EN )
Internal finish Bright polish
External finish Bright polish
This unit allows the incorporation of a liquid spray system to introduce liquids in spray form during the process. The injector is connected to the spray nozzles by means of a rotary system and is fed with additives from a pressurized tank or by means of a variable speed displacement pump at constant pressure.
The automatic stop positions are: loading, discharging, and sampling. Before stopping at one of these three positions, the system performs a cycle which slows down the mixer in order to reach the stopping position with the highest possible accuracy and remains halted at that point.
The unit can be equipped with an automated loading system for introducing powders and granules into the blender body by means of a vacuum unit with self-cleaning hoses. It prevents creation of dust.
The skid can also be provided with a complete monoblock vacuum unit with liquid ring pump.
It is possible to install an automated vacuum discharge system. It includes a product receiving hopper with an automated
self-cleaning filter; as well as a control panel for the unit.
The loading/discharge can be carried out with pneumatically actuated retractable hermetic bellows. This system and the vacuum loading/discharge can be combined.
- Thursday, December 22,
Are you thinking about using a v type blender in your manufacturing process? If you conduct a search on the internet for this type of blender, I'm willing to bet that you will get a ton of results.
Before you settle on a purchase for a decent V blender, there are a couple of things you should think about first.
There are many types of mixers in pharmaceutical industry. And v blenders come from the tumble blending family. Today, there are mainly three types of tumble blenders out there: double cone blenders, slant cone blenders, and V blenders.
Read More:
What is Double Cone Blender: A Quick Overview
(Slant Cone Blender Image Credit:GEMCO)
Distinguished from its siblings, a V blender consists of two hollow cylindrical shells. The two shells are connected together in a V shape at an angle ranging from 75 degrees to 90 degrees. So, the V blender is also known as a twin shell blender or a V cone blender.
V blenders, in a nutshell, are one of the most popular pieces of equipment used for tumble blending. This is due to the fact that they are capable of providing rapid blending along with high levels of mixing efficiency.
Twin shell blenders are best suited for dry mixing. Yet, due to the low shearing force, they cannot be used to process very soft powders or granules. Even so, they are often used in a variety of industries, including pharmaceuticals, nutraceuticals, chemicals, food, cosmetics, fertilizers, and others.
If you've read this far, you might be wondering about the V blender working principle. There's no rush. We need a clear understanding of the V blender design before we can move on to learning how the V blender actually works.
So, let's begin by looking at the twin shell blender construction prior to exploring the V blender working principle.
The twin shell blender resembles a vessel in a V shape, and it is made up of two inclined cylinders that are welded together. Most twin shell blenders come in a 304 stainless steel construction, complying with cGMP/GMP regulations.
This style of blender features three different openings. The two openings on the top of the V-shaped vessel function as feed inlets. Both of them are fitted with removable covers. The third opening on the bottom is equipped with a discharge valve that is used for discharging the mixed product.
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Unlike ribbon blenders, the V blender's mixing vessel is supported by trunnions on both sides rather than a rotating shaft. Trunnions enable it to rotate about a horizontal axis.
It's worth mentioning that V blenders can be provided with high-speed intensifier bars to boost mixing efficiency. The intensifier bar goes into the vessel through trunnions and can be used to break up lumps in the materials to be blended or those formed during mixing.
Also, the twin shell blender construction makes it possible to include trace amounts of liquid ingredients using spray nozzles mounted on the intensifier bar. As the blender rotates, the liquid addition can be sprayed constantly across the solids.
V blenders can also be customized to include heating and cooling jackets, vacuum drying systems, explosion-proof motors and controls, and other specialized components to cater to a wide range of mixing applications.
How does a V blender actually work, though?
V blenders cause materials to cascade within a rotating vessel relying on the action of gravity. Simply put, they work on a diffusion mechanism: solids are dispersed across the newly exposed surface as the vessel rotates about a horizontal axis.
As you can tell, the V cone blender principle is quite simple.
Materials to be blended are loaded via two feed inlets on the top of the V-shaped mixing vessel. Here's a tip. Fill the blender up to between 50 and 60 percent of its total volume. The fill-up volume beyond this range will probably double the mixing time if you want a homogeneous blend.
When the materials are ready, the twin shell blender starts to work. In general, the speed of operation for twin shell blenders is anywhere from 5 to 25 revolutions per minute.
As the V blender performs a 360-degree rotation, the ingredients keep breaking apart and coming back together. This is an integral part of the V blender working principle - the blending process.
The blending happens as the ingredients fall randomly inside the vessel. The material moves repeatedly toward and away from the center of the vessel. This, along with increased friction between the material and the long, straight sides of the vessel, causes a gentle but even mixing.
The speed of the V blender can also affect how well it mixes. There is a critical speed that, when reached, makes mixing much less effective. V blenders are typically made to run between 50% and 80% of the critical speed.
The normal cycle duration is somewhere in the range of 15 minutes; however, it may be significantly shorter depending on the complexity of the blending.
Following that, the mixed product is discharged through a butterfly valve that has been hermetically sealed. The valve can be operated manually by using a hand lever, or it can be controlled pneumatically.
That's all about the V cone blender principle. As you can see, the idea behind how twin shell blenders work is not rocket science.
So, why should you choose a twin shell blender? And when you compare V blenders with other types, such as V blender vs ribbon blender, which one should you choose?
V blenders are a solid choice to go with when you need to blend free-flowing solids or low-viscosity liquids.
Here are a bunch of advantages of V cone blenders.
At iPharMachine, we can help with all your blending needs, beginning with the laboratory scale and working your way up to the commercial batch sizes. We offer a wide range of v type blenders, from mini models to large ones with a maximum filling loading capacity of L.
iPharMachine is a reliable partner to have on your side whether you're seeking one-stop solutions. After addressing your blending needs, we are also able to assist you with the next processes, such as filling and packaging. Contact us today to find out more!
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