How does a packaging and printing factory choose laser die cutting machine?

How does a packaging and printing factory choose laser die cutting machine? There are many kinds of equipment on the market now, with prices ranging from 15,000~25,000 usd, which is dazzling.
Laser power 400W, 600W, 1000W, 1500W etc.
I thought at the time that this matter is actually similar to buying a mobile phone – you have to figure out what functions you need first, and don’t be confused by those fancy parameters.

Take laser power for example. Some equipment is called “high power”, but it may not be suitable for your business in actual use. For example, my friend’s factory usually cuts plywood below 18 mm, and occasionally uses 22mm plywood and acrylic sheet. need to cut 10-15 pcs per day. As a result, he listened to the sales and bought a 1500W high-power laser die cutting machine, but found that it was not used at all and was also a waste of electricity. Later, he realized that the power size is not the key, but the ability to meet his own processing needs is the hard truth. It’s like buying a mobile phone. Although the top chip has strong performance, you usually make calls and watch Titok. It is more cost-effective to buy a 600W machine.

Now the competition among manufacturers in the laser industry is fierce. In order to compete at low prices, many small manufacturers use poor materials and accessories, and the laser machine will break down after a short time. My friend has encountered this situation. He bought a device for cheap, but the laser broke down in less than half a year. When he asked the manufacturer for repair, they either dragged their feet or simply lost contact. Later, he learned that the selection of laser machine depends on the brand reputation and after-sales service, just like buying a car. 4S stores of big brands are always more reliable than roadside stores.

Speaking of the future, I think laser die cutting equipment will definitely become more and more intelligent. Now some equipment can directly design die cutting through computers, without manual drawing like before. Not only is the error small, but the efficiency is also high. The new equipment my friend is using now can also automatically adjust the cutting parameters.

In addition, environmental protection is also a major trend. Now many places have increasingly strict requirements on factory emissions, and laser die cutting equipment must also become “green”. For example, some equipment uses a new exhaust system, and black smoke is almost invisible, and the air in the workshop is much fresher. My friend said that when he chooses equipment now, in addition to looking at performance, he will also ask whether the manufacturer has energy-saving certification, just like looking at energy efficiency labels when buying home appliances.

However, with such rapid changes in the future, how should ordinary users deal with it? I think there are two important points: first, don’t think about getting it all in one go, the equipment must have room for upgrades; second, find a reliable manufacturer, preferably one that can provide long-term technical support. Just like the manufacturer my friend is working with now, not only can equipment problems be solved in a timely manner, but people are also sent regularly to check and maintain them, and even teach them how to use new functions. This kind of “nanny-style” service is more reassuring than the equipment itself.

In fact, in the final analysis, choosing a laser die-cutting equipment is like making friends – you can’t just look at the appearance, you have to look at whether the inside is reliable. Parameters such as power and precision are one aspect, but stability, after-sales service and the strength of the manufacturer are equally important. After all, the equipment is to be used for a long time. If you save a little money today, you may have to spend a lot of money to repair it tomorrow, or even delay production. Just like what my friend said: “Buying equipment is like marrying a wife. You have to find someone who can support you, not just someone who is pretty.” This is a rough but true statement, right?

which is a better choice for acrylic cutting?

Laser Cutter Machine vs CNC Router for Acrylic cutting

which is a better choice?

Nowadays, a lot of acrylic product manufacturers often choose the CNC Acrylic Laser Cutter Machine or CNC Router acrylic cutting machine for the processing of acrylics. Acrylics, as a plastic polymer material, has a wide range of application. People often use it to produce advertising signboards, lamp boxes, direction boards, shop windows, and display racks, etc.

Do you know which acrylic in the pictures above is laser cut and which is CNC Router cut?

Both the CNC Acrylic Laser Cutter Machine and CNC Router acrylic cutting machine have their own advantages for processing acrylic. While choosing to purchase, the users need to understand the machines and choose the right one based on their demands. Otherwise, if the users choose the unsuitable machine, it will affect the processing effect, and also cause economic loss. This article mainly focuses on the brief introduction, working principles, and the comparison of processing features of the two machines. And the following also gives suggestions on how to choose a suitable machine.

CNC Acrylic Laser Cutter Machine

CNC Router acrylic cutting machine

Both the laser acrylic cutting machine and the CNC Router acrylic cutting machine are computer-controlled ones. And they both need a computer to design cutting graphics and control the cutting process. The users use the software to design the picture file or cutting route and import it into the cutting machine. Later, the machine automatically completes the cutting process.

laser cutting machine is a complete set of optical components. It uses the high energy of the laser to complete the cutting or engraving of materials

CNC acrylic cutting machine is a real cutting tool. It uses a cutting head with high-speed rotation to cut and engrave acrylic material.  

The laser acrylic cutting machine emits laser and makes it form a high-power density laser beam through the optical system. The laser beam irradiates on the surface of the acrylic work-piece. And such a work-piece will reach the melting point or boiling point. At the same time, the compressed air coaxial with the beam blows away the molten or vaporized acrylic materials. As the laser beam and the work-piece moves, the cutting graphics appear on the acrylic material eventually. In this way, the laser acrylic cutting machine completes the cutting processing.

CNC acrylic cutting machine relies on the high-speed rotation of the cutting head driven by the motor spindle. It cuts and engraves the acrylic material fixed on the worktable through the tool according to the processing material. And the machine can also engrave various plane materials or 3D embossing graphics according to the designs on the computer. And it can realize automatic cutting operation.

Laser acrylic cutting machine: Laser acrylic cutting machine belongs to non-contact processing and does not need to fix the work-piece. It can protect the surface of thin or soft materials from being scratched or deformed. In addition, the laser beam is very thin, so the cutting marks or engraving graphics can be very small.  Therefore, It is suitable for cutting thin acrylic boards (generally less than 20 mm), especially for the processing of small details. And it can meet high precision marking requirements.

CNC acrylic cutting machine:
It uses mechanical means and has larger power. As it uses the mechanical tool and directly contact the work-piece during processing, it may not achieve high precision. But for the thicker acrylic plates, this machine can complete cutting or embossing processing easily. Especially for the acrylic reliefs and 3D sculptures with different depths, the CNC acrylic cutting machine has more advantages. 

How to choose a suitable acrylic cutting machine?

Choosing a suitable acrylic cutting machine is very important for the users. Before purchasing the machine, they’d better consider the following aspects: Acrylic processing requirements When choosing the acrylic cutting machine, the users should consider the size, thickness, and processing requirements at first. ·Thin acrylic board cutting and marking: When cutting acrylic boards, if it is a thin sheet, less than 20 mm, the users choose an acrylic laser cutting machine. If you need to engrave letters, LOGO, and other graphics on the surface of acrylic or PMMA, it’s better to choose a laser cutting machine.  ·Thick acrylic board cutting and embossing  If the thickness of acrylic boards exceeds 20 mm, it is recommended to choose a CNC cutting machine for acrylic processing. When the users need to groove and emboss their designs on the acrylic materials, a CNC cutting machine is the optimal.  They can also consult with the suppliers of laser engraving or CNC Router machine to obtain professional opinions and suggestions. Sizes of the acrylic materials  The users may also consider the size of the materials for laser processing. It is about the choice of the size of the working table of the laser engraving machine.

We have more than 10 years experiences in laser cutting, If you don’t know how to choose a suitable acrylic cutting machine, please contact us by video call!

Six practical functions of Fiber laser cutting

In recent years, the role of laser cutting machines in the development of the sheet metal industry has become increasingly prominent. During the cutting process, there are six practical functions. With these practical functions, the processing efficiency and cutting performance of the laser cutting machine can be greatly improved.If you learn the functions of laser cutting and processing, you can save $10,000 a year.

Function 1: Leapfrog

Leapfrog is the empty stroke method of laser cutting machine. As shown in the figure below, after hole 1 is cut, hole 2 needs to be cut next. The cutting head is to move from point A to point B. Of course, the laser should be turned off during the movement. During the movement process from point A to point B, the machine runs “empty”, which is called empty travel.

The empty travel of the early laser cutting machine is shown in the figure below, and the cutting head has to complete three actions in sequence: rising (to a safe enough height), translation (reaching above point B), and descending.

Compress idle time to improve machine efficiency. If the three actions completed sequentially are completed “simultaneously”, the idle time can be shortened: when the cutting head moves from point A to point B, it rises at the same time; when it approaches point B, it descends at the same time. As shown below.

The track of the cutting head moving in the empty space is like an arc drawn by a frog jumping.

In the development of laser cutting machines, leapfrog can be regarded as an outstanding technological progress. Leapfrog action only takes up the translational time from point A to point B, saving the time for rising and falling. When the frog jumps, it catches the food; when the laser cutting machine jumps, what it “catches” is high efficiency. If the laser cutting machine does not have the leapfrog function, I am afraid it will not be popular.

Function 2: Auto focus

When cutting different materials, the focus of the laser beam is required to fall on different positions of the cross-section of the workpiece. Therefore, it is necessary to adjust the position of the focal point (focusing). Early laser cutting machines generally used manual focusing; at present, many manufacturers’ machines have realized automatic focusing.

Some people may say that it is enough to change the height of the cutting head. When the cutting head is raised, the focus position will be higher, and if the cutting head is lowered, the focus position will be lower. It’s not that simple.

In fact, during the cutting process, the distance between the nozzle and the workpiece (nozzle height) is about 0.5-1.5mm, which may be regarded as a fixed value, that is, the nozzle height remains unchanged, so the focus cannot be adjusted by lifting the cutting head (otherwise cannot complete the cutting process).

The focal length of the focusing mirror cannot be changed, so it cannot be expected to adjust the focus by changing the focal length. If the position of the focusing mirror is changed, the focus position can be changed: when the focusing mirror is lowered, the focus is lowered, and when the focusing mirror is raised, the focus is raised. ——This is indeed a way of focusing. Using a motor to drive the focusing mirror to move up and down can realize automatic focusing.

Another automatic focusing method is: before the light beam enters the focusing mirror, install a variable curvature mirror (or adjustable mirror), and change the divergence angle of the reflected beam by changing the curvature of the mirror, thereby changing the focus position. As shown below.

With the automatic focusing function, the processing efficiency of the laser cutting machine can be significantly improved: the time for piercing thick plates is greatly reduced; when processing workpieces of different materials and thicknesses, the machine can automatically and quickly adjust the focus to the most suitable position.

Function 3: Automatic edge detection

When the sheet is placed on the table, if it is skewed, it may cause waste when cutting. If the inclination angle and origin of the sheet can be sensed, the cutting process can be adjusted to suit the angle and position of the sheet, thereby avoiding waste. The automatic edge finding function came into being.

After starting the automatic edge finding function, the cutting head starts from point P, and automatically measures 3 points on the two vertical sides of the sheet: P1, P2, P3, and automatically calculates the inclination angle A of the sheet, and the angle of the sheet. origin.

Function 4: Pre-punched

Pre-punched is a processing technology, not a function of the machine itself. When laser cutting thicker plates, the cutting process of each contour has to go through two stages: 1. Perforation, 2. Cutting.

Pre-punched avoids overburning.During the piercing process of the thick plate, heat accumulation is formed around the piercing point, and if it is cut immediately, overburning will occur. Using the concentrated piercing process, when all the piercings are completed and the cutting is returned to the starting point, there is sufficient time for heat dissipation to avoid overburning.

Function 5: Micro-connection

During laser cutting, the sheet is held by serrated support bars. If the cut part is not small enough to fall from the gap of the support bar; if it is not big enough to be held by the support bar, it may lose its balance and warp. The cutting head moving at high speed may collide with it, which may cause the machine to stop at least, or damage the cutting head at worst.

This phenomenon can be avoided by using the bridge (micro-connection) cutting process. When programming graphics for laser cutting, the closed contour is intentionally broken at several places, so that the parts will stick to the surrounding materials after cutting and will not fall off. These broken places are the bridge positions. Also known as a breakpoint, or a micro-joint (this name comes from a blunt translation of MicroJoint). The breaking distance is about 0.2-1mm, which is inversely proportional to the thickness of the sheet. Based on different angles, there are these different names: based on the outline, it is disconnected, so it is called a breakpoint; based on the part, it is bonded to the base material, so it is called a bridge or micro-connection.

Function 6: Common edge cutting

If the contours of adjacent parts are straight lines with the same angle, they can be merged into a straight line and cut only once. This is known as coedge cutting. Obviously, common edge cutting reduces the cutting length and can significantly improve processing efficiency.

Coedge cutting does not require the shape of the part to be rectangular. As shown below.

The blue line is the common side, and the common side cutting not only saves cutting time, but also reduces the number of perforations, so the benefits are very obvious.

Acrylic cutting machine

Acrylic Laser Cutting

Advantages

  • 1.The overall structure of the bed is welded by 100mm square pipes, and the Y-axis guide rail is creatively laid directly on the structure of the bed. The thickness of the structure is 10mm, and it is finished by gantry finishing.
  • 2.It is rack transmission, and the grinding grade rack with DIN6 precision level is used, which has higher precision and better stability than traditional belt transmission.
  • 3.The constant optical path with 5 reflectors is used, no matter where the laser head moves, it will always remain the same.
  • 4.Follow-up ventilation and partition ventilation, follow-up ventilation can absorb smoke and dust generated during the working process of laser head according to the moving range of the gantry. Partition ventilation can be opened at fixed points according to the working area or close the air duct so that the fan can absorb smoke and dust to the maximum extent.
  • 5.Y-axis double drive and high-precision helical planetary reducer and full AC serve adopt direct connection structure, which can avoid unnecessary errors.
  • 6.Use tempered beams to reduce losses. Coupled with a 20mm wide belt, the precision and stability will be higher than ordinary belt drives.
  • 7.The self-developed upper follow-up ventilation patent, combined with partition ventilation, can effectively suck away the waste gas and irritating gas generated during large-format processing.

Cutting Samples

Product parameters

Machine ModelNB-1325/NB-1530/NB-2030
Working Area1300*2500mm/1500*3000mm/2000*3000mm
Laser Power150W/300W/320W/400W /double heads for option
Control SystemRuida laser control system
Working Speed0-500mm/s
Repeatability±0.05mm
XYZ transmission ModeHigh-precision Taiwan QAQ rack guide rail
Cooling MethodIndustrial Water Chiller