Before talking about the packaging machine, we must first understand what is a valve bag and what is an open bag.
Open bags and valve bags are both popular packaging bags, which often appear in people's daily life. Today, let's introduce the difference between open bags and valve bags:
From the point of view of the bag itself, the open pocket is a straight tube with a bottom bottom and no seal on the top. The packaged products are directly poured or put into the bag under the action of gravity, and are sewed and packaged by an industrial sewing machine. The various shopping bags, convenience bags and woven bags we usually use can be called open pockets.
Valve pockets, as the name suggests, have a "valve". The bag body is sewn up and down, leaving a feeding port (valve) for machine filling, and the packaged products are loaded into the bag from the filling port under the action of pneumatic or mechanical power.
The valve pocket is divided into an outer valve pocket and an inner valve pocket. The principle of the sealing method is that when the goods are filled, the contents will squeeze the valve port from the inside to achieve the purpose of sealing, and the outer valve port will be filled with the material. It needs to be manually folded, and the inner valve pocket is automatically sealed after the material is filled.
The open bag and valve bag processes are different and the products suitable for packaging are also different. The valve bag packaging cost is high, and the packaging machine is also more expensive, but the weighing is very accurate, easy to stack, and because it does not need to be re-sealed, it saves a lot of human resources, making production more efficient, and the valve bag packaging is more beautiful, It also enhances the image of the product virtually.
The open pocket packaging has low technical content, and it needs to be sealed again after the material is full, which requires a lot of labor costs. However, due to its low cost, it is also widely used in all walks of life.
For different packaging bags, its packaging machines are naturally divided into valve bag packaging machines and open bag packaging machines.
The valve pocket packaging machine is an automatic quantitative packaging machine designed for various fine powder or ultrafine powder materials with low bulk density, strong air affinity, and excellent or poor self-flow. It is mainly divided into: impeller packaging machine, spiral packaging machine, pneumatic packaging machine.
Open bag packaging machine is mainly used for quantitative automatic packaging of powdery and granular materials, and is suitable for quantitative packaging of materials in grain, feed, chemical, food and other industries. Usually equipped with packaging equipment.