why is it like this? Is your vacuum adsorption system not powerful enough? So how to solve this problem? This article will tell you the answer.

In order to ensure that the material is firmly fixed on the surface of the working platform and avoid displacement during cutting, we have equipped each vibrating knife cutting machine with a vacuum adsorption system, but there are still customers telling us that the material cannot be perfectly adsorbed, and they will doubt whether it is The power of the vacuum adsorption system is too low?

It was even concluded that good material immobilization could not be achieved with a vacuum suction system.

According to the customer's feedback, we divided it into several situations, and made a detailed description for each situation and how to improve vacuum adsorption.

The first situation: the customer's understanding of the vacuum adsorption system is incorrect.

For example, we have a customer who put a piece of A4 paper on the work surface after receiving the machine, and found that the material could not be fixed at all, so he concluded that the vacuum adsorption system could not work perfectly.

Is it really? To understand this problem, we must first understand what the working principle of the vacuum adsorption system is.

The vacuum adsorption system uses atmospheric pressure as the force to form a closed space between the platform and the material. A certain amount of gas molecules are pumped out by the vacuum pump, reducing the pressure and forming a pressure difference inside and outside the platform. Under this pressure, the material is firmly absorbed and held.

Through the above introduction, we found that in order to firmly adsorb the material on the workbench, a vacuum area must be formed between the material and the platform, so how to form a good vacuum area?

First, the entire surface of the working platform must be covered by the material during processing.

We try to cover the entire surface of the working platform with material. Only when the working platform is completely covered can it be isolated from the outside space. At this time, use vacuum adsorption to discharge all the air inside to form a good vacuum. In this area, the material is firmly adsorbed by the difference in air pressure. Instead of the customer I mentioned earlier, just put a piece of A4 paper on the workbench, and its adsorption area is 1600mmX2500mm. At this time, 90% of the working platform is exposed and not isolated from the outside world. Therefore, even if the vacuum pump is in working condition, a vacuum area cannot be formed on the surface of the material and the working platform, so that the effect of fixing the material cannot be realized.

Second, choose the appropriate vacuum adsorption system.

When the customer finds that the material cannot be adsorbed firmly, the first reaction is to increase the power of the vacuum adsorption system. Is it really?

We will configure a suitable vacuum adsorption system according to the size of the processing area selected by the customer. The basic principle is that the larger the worktable, the greater the vacuum adsorption power configured, so as to quickly remove the gas inside the platform and form a vacuum state.

If the customer's effective processing area is less than 1600X2500mm, according to our experience, we will configure a 380V, 7.5KW vacuum adsorption system for the customer, which can perfectly realize the adsorption and fixation of materials; if the working area is 1600X3000mm or larger, we will configure it for the customer 9kw or 5.5KW X2 vacuum adsorption system.

If there is no special processing requirement (such as multi-layer cutting), we do not recommend configuring a super-powerful vacuum system for a narrow working area, because it will increase the cost of purchasing and using the machine for customers, and the effect will not be much different.

The greater the power of the vacuum adsorption system, the stronger the ability to generate negative pressure instantly, which is very necessary for large-format cutting machines. But we cannot simply think that the displacement of the material during processing is caused by the power of the vacuum adsorption system being too small, because as long as a vacuum area is generated between the material and the working platform, the material can be firmly fixed.

Some customers will ask: how can we know whether the adsorption effect is good or not? In fact, we equip each vacuum pump with a negative pressure gauge. When a vacuum zone is formed between the working platform and the material, the negative pressure gauge will display pressure data, which means that a vacuum has been formed between the material and the platform. With a good vacuum area, materials can be firmly adsorbed on the work surface.

Through the above two points, we can understand:

As long as the entire working platform is covered and an appropriate power vacuum adsorption system is selected, a good adsorption effect can be guaranteed. On the contrary, if the working platform is not fully covered during work, even if a high-power vacuum adsorption system is selected, perfect adsorption cannot be achieved.

In the second case, the size of the processing material and the workpiece are different;

In order to meet the processing of materials and workpieces of different sizes, the customer chose a super large format vibrating knife cutting machine. In actual use, when the customer processes large-sized materials, it can be completely covered on the work surface, so as to achieve a good adsorption effect, but when the customer processes small-sized materials, it cannot be well adsorbed.

How to solve this situation?

The traditional solution is the "covering method". We ask customers to cover the exposed working area with an airtight film to achieve a good adsorption effect. Using this method can solve this problem very well, but customers will find it too troublesome and hope for a smarter solution.

This is also possible, that is the "partitioned adsorption method", that is, the working platform is divided into several independent units, which are closed and opened by the control system to process materials of different sizes and achieve the best adsorption effect. There are four modes of partition adsorption: manual partition, map partition, follow partition and single-zone follow mode.

So how does each mode work? How should customers use it? Let me answer for you.

Manual zoning: Before cutting, the customer can manually select which areas to turn on the adsorption, which areas to turn off the adsorption, or all areas are in the open adsorption state according to the size of the processed material. This mode is mostly used for materials that cannot cover the entire processing area, and the size of a single cutting pattern is larger than the size of a single suction area.

Partition according to the image: The machine automatically opens the required adsorption area according to the size of the processed image to achieve the best adsorption effect. This mode is suitable for cutting very large graphics.

Follow the partition: The machine will automatically start the adsorption of this area and the nearby area according to the change of the tool position to ensure smooth cutting. This mode is suitable for situations where the size of the material is large but the size of the cutting workpiece is small.

One area with area: It means that the machine automatically turns on the adsorption function of this area according to the area where the cutter is located, so as to ensure that the materials in this area are cut. This mode is suitable for graphics with small crop size and dense nesting.

Through the above introduction, everyone will know the solution to the poor adsorption when the large machine cuts small materials. We use the working area to divide the adsorption area, and set which positions to turn on the adsorption and which positions to turn off the adsorption according to the size of the material, so as to ensure the formation of a vacuum area between the materials. The working platform fixes the material on the working surface.

Is the method of partition adsorption can solve all the problems of poor adsorption? The answer is no. When we cut airtight materials, we can use partition adsorption to enhance the vacuum adsorption capacity. However, when the material itself has air permeability, this method cannot achieve a good fixing effect. This is also a misunderstanding of many customers. Therefore, even if the partition adsorption system is installed, the adsorption capacity of the machine cannot be improved at all.

The reason for this phenomenon is that the customer does not really understand the principle of vacuum adsorption, and there is another very important reason, that is, the factory that produces the machine does not know the material characteristics of the customer, so it cannot provide the customer with the correct solution.

So, is there a solution for breathable materials?

The answer is: yes.

If you have special requirements, we can negotiate amicably; If you have any further information, please contact us.