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Several ways to discharge finished products from mixing machine to storage tank

March 30, 2013

There’re several ways to discharge finished products from mixing machine to storage tank or filling machine. To better explain the discharging ways, we’ll take Ginhong’s cosmetic making machine for example.

1. The first way to discharge finished products from mixing machine is to use a pump.

Transfer pumps are the number one choice to discharge products and they can be used in almost all circumstances. You can use pumps to transfer ingredients to mixing machine, to transfer finished products to storage tank and to filling machine etc. It can be used in all kinds of mixing tanks whether it’s an open tank or vacuum tank.

According to different viscosity of each product, we use different transfer pumps. If we want to discharge cream and lotion from emulsifying machines, we may use a lobe pump, which is capable of transferring almost all kinds of viscous products.

If we want to discharge liquids from liquid mixers, we sometimes use a centrifugal pump, which is suitable for transferring low viscosity products.

Screw pump is another type of transfer pump which was once popular before lobe pump was introduced to China. But screw pump has the disadvantages of difficult-to-clean, low efficiency and difficult-to-clean. So lobe pumps have replaced screw pumps in cosmetics and pharmaceuticals industries.

2. The second way to discharge products from mixing machine is to use compressed air.

You apply clean compressed air to closed type mixing equipment and the product will be pressed out from the bottom valve of the tanks.

The mixing machine which you apply compressed air should be able to resist some pressure with a safety valve for protection. Generally when we discharge cream from a cosmetic cream making machine, we’ll apply 0.5~1bar compressed air which makes the transfer quickly.

Compressed air can be used in all closed and vacuum mixing tanks. It’s convenient as most cosmetic factories have compressed air source. The only concern is the safety of using compressed air in these mixing tanks.

3. The third way to discharge product from mixing machine is to pour it out or take it out manually.

Take our RS type tilt-able vacuum emulsifying mixer for instance, these’s a tilting system in the main emulsifying mixer. When we lift the cover, we can tilt the main tank forward to pour the cream out. Although it sounds kind of primitive, it’s popular in some factories to transfer the cream.

If the cream is sticky, it’s hard to pour it out naturally. In this case, you use a type of spoon or something to help it come out. The disadvantage of this manual discharge is pollution sometimes occurs during it.

4. The forth way of discharging products from mixing machine is to use homogenizer pump.

In some mixing machines, homogenizer works not only as a rotor stator homogenizer but also a pump. Although its’ not powerful as the professional transfer pump, homogenizer can do the job of transferring cream from the mixing tanks.

In our RX and RB vacuum emulsifying homogenizers, their inline homogenizer works as a good discharge pump for short distance transfer. If you buy such emulsifying machines, you can save the cost of an extra discharge pump.

One disadvantage of homogenizer pump is that it doesn’t have the same pressure of a professional transfer pump. So it’s a difficult job when it comes to long distance or high place transfer.

5. The fifth way to discharge products from mixing machine is use a mechanic presser.

When the paste is of really high viscosity, it’s difficult to use all the above methods to discharge it. Then you may need a mechanic presser which often works with planetary mixers.

Planetary mixer generally has a mixing system and some replaceable tanks, which makes processing continuous. When one batch is ready, you quickly move the tank with paste away and replace with a new tank. In this way, planetary mixer can work non-stop for more batches.

Because the replaceable tanks are in cylinder shape, the mechanic presser is round with silicon seal around the edge of the presser. It’s generally driven by oil hydraulic pump to press the paste along the inside wall of the tank. Then paste comes out from the bottom valve of the tank.

6. The sixth way to discharge finished products from mixing machine is to use vacuum.

Discharging finished products from mixing machinery by vacuum suction is good and fast.

Firstly the vacuum storage tank is connected with mixing machine by a plastic or stainless steel pipe. We generate vacuum inside the vacuum storage tank by the vacuum pump. After the vacuum is generated inside the tank, we open the valves on the storage tank and mixing machine and the product will be sucked inside automatically because of the pressure difference.

Vacuum discharging is possible in vacuum mixers only. You don’t need to add any other device to discharging products. It’s suitable to transfer cream and liquids.

7. The seventh way to discharge finished products from storage tank is to transfer by gravity.

We sometimes use gravity to discharge finished products from storage tanks to filling machines. In this way, we generally put the storage tank on a high platform to make sure that the bottom valve of the storage tank is higher than the hopper of filling machines. Or we make long legs for the storage tanks to make them higher.

Because of the height difference, the cream or liquid inside the storage tanks will come out automatically into the filler by gravity. Of course the cream should at least have some free flow ability.

Discharging by gravity is popular in some countries with cheap cost. If you want to use this discharge way, you should consider the height of your workshop first.

Of course there may be some other methods to discharge finished products. But the above seven ways are the most used in our mixing machine for cosmetics, pharmaceuticals, chemicals and food industries.

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