Dec. 16, 2024
A more detailed treatment of the typical considerations involved in cutting laser selection is provided in the Cutting Laser Selection Checklist .
For more information, please visit NB.
But what are your unique needs and project requirements? A critical first step in making an informed purchasing decision is properly identifying the considerations that are most significant in your own application. Some of the most common of these include:
Coherent is one of the worlds largest laser companies, and a global leader in materials and networking, as well. We service numerous cutting applications for the industrial, communications, microelectronics, instrumentation markets, and more. Most importantly, Coherent manufactures a comprehensive range of cutting lasers, covering virtually every technology currently in use. This allows us to provide unbiased recommendations based solely on your unique needs and project requirements.
Getting this application specific information isnt always straightforward because many vendors only offer a limited range of laser technologies. As a result, they promote what they have as being optimal for every use, whether it is or not.
TIP: The Overview Chart provided lists the main types of cutting lasers currently available and is a great place to start your journey. Links embedded in the Overview Chart will take you to more information on the lasers themselves, or directly into the sections of this document that offer guidance on which of these technologies is usually most appropriate for a given application.
The purpose of this Buyers Guide to Cutting Lasers is to help you select a cutting laser. Were not going to tell you which laser to buy or which company to buy it from. However, we are going to provide you with a lot of context so you feel confident when youre ready to make a purchase decision. More than anything else, our goal is to educate you on what questions to ask when youre researching buying a cutting laser.
Styrene is a relatively cheap polymer commonly formed in thin sheets which are similar to acrylic. These sheets are lightweight and strong but can be brittle. Styrene is very common in toys such as hobby models and is also used in home appliances.
Styrene is a good material for laser cutting as it has a low melting point and melts easily in the path of the laser. However, the low melting point also means that cuts cannot be too intricate or close together as the edges will melt and lose detail. The styrene sheet can warp if it gets too hot.
Kapton® tape is a thin film (only a few thousandths of an inch thick) of a polymer called a polyimide, with an adhesive coating on one side or both. It is most commonly used in the manufacture of electronics, but is also used widely in spacecraft! The reasons for these applications are that Kapton® has a relatively high thermal conductivity, is an electrical insulator, and maintains these properties across a wide temperature range. An example of the use of Kapton® tape in electronics is to attach circuit boards to heat sinks while electrically insulating them. It can withstand the temperatures of soldering.
It is an ideal material for laser cutting as it is very thin and is a thermoset plastic with high-temperature resistance. When laser cutting Kapton®, the material in the direct path of the laser absorbs the optical energy and is vaporized. The adjacent material conducts the heat well but shows some carbonization. This heat-affected zone is very narrow, and the carbonization can be easily removed with solvent. Therefore, Kapton® tape can be laser cut in complex and precise patterns, ideal for mating with circuit boards.
Nylon is a generic name for a range of thermoplastic polyamides. It is commonly available as a filament woven into a thin fabric, originally under the trademark of Perlon®. It has high strength and toughness. It is used in textiles such as rainwear, lingerie, and parachutes. Thicker filaments are also available for applications such as fishing lines.
Nylon fabric is an ideal material for laser cutting as the laser leaves a subtle melted edge which prevents the fabric from fraying.
High-density polyethylene is a widely used plastic due to its cost-effectiveness and versatility. It has a high strength-to-weight ratio and good moisture and chemical resistance. HDPE can be formed into a wide variety of shapes, including pipes, containers, and sheets.
HDPE is a common material for laser cutting. It melts easily at the point of laser incidence and does not discolor at the cut. However, due to its relatively low melting point, care must be taken that high power or multiple cuts close together do not cause localized melting and an uneven edge.
To learn more, see our guide on High-Density Polyethylene.
Polypropylene is a thermoplastic polymer that has excellent chemical and heat resistance. It is also rigid with a high impact resistance. PP has wide industrial applications, but can also be used in domestic and household containers.
Polypropylene is cut well by laser, giving a clean cut free of discoloration or charring. A slightly raised edge or burr may be left at the edge.
Polyethylene is the most commonly produced plastic globally, and it has many different forms and varieties. Some examples include the relatively rigid high-density polyethylene (HDPE) and the flexible, lightweight linear low-density polyethylene (LLDPE). These variations provide many different applications for plastic, but its largest use is in films for packaging, which include food wrapping and plastic bags. Polyethylene tends to have a waxy, soft surface.
PE can be cut well with a laser cutter. Its relatively low melting point allows a clean cut to be made easily with a CO2 laser. Depending on the form of polyethylene, it may discolor slightly and have a wide kerf.
Are you interested in learning more about Laser Cutting Protection Film Supplier? Contact us today to secure an expert consultation!
ABS is an opaque thermoplastic blend of three other polymers: acrylonitrile, butadiene, and styrene. Variations of ABS can be manufactured by varying the blend, but generally, ABS is rigid and durable with a high impact resistance. It can be easily formed into different shapes, and therefore has a wide application in wear-resistant parts, including motor parts, keyboard keys, and equipment housings.
ABS can be tricky to laser cut, predominantly due to the gases (fumes) that are given off. These are a result of the energy from the laser causing the polymer to degrade into multiple products. Some of these gaseous products could be hazardous. When laser cutting ABS plastic, it is highly recommended to extract the vapor into the atmosphere.
In terms of the cut, a polished edge is possible. Generally, fine cuts cannot be made in ABS as the material tends to heat up and warp.
Are you interested in learning more about Laser Protection Film? Contact us today to secure an expert consultation!
Two-tone acrylic is a variation of acrylic that laminates one color of a thin acrylic sheet onto another core acrylic sheet of a different color. This has the same useful material properties as standard acrylic, but is more visually striking, especially when engraved. Engraving two-tone acrylic through only the thinner top layer, to reveal the color of the bottom layer, provides a visual contrast that is valuable in signage and promotional materials.
Two-tone acrylic is laser cut similarly to standard acrylicit is tolerant of a wide range of settings and can give a laser-polished edge.
Mylar® is the trade name for thin polyester sheets. These sheets are usually transparent, flexible, and durable. Mylar® also has excellent moisture and chemical resistance, and a very good range of temperature resistance. As such, this plastic finds good application in food packaging. It is also the preferred material for laser cutting stencils.
Mylar® sheets of 200 to 250 microns are usually used for creating stencils. Laser cutting this material allows for high-precision cuts, with a very subtle burred edge.
Laser cutting plastics should be done with a CO2 lasergenerally, either a 9.3-micron or 10.6-micron wavelength CO2 laser shouldnt affect the quality of the cut. Most plastics (including those listed here) do not absorb the optical energy from a fiber laser (1.06-micron wavelength) well. Therefore a fiber laser should not be used to laser cut plastics but is recommended for engraving.
Cutting plastic with a laser is generally easier with a medium to high-powered CO2 laser. Due to the risk of melting or burning some plastics, better results (cleaner edges) are usually achieved with a higher speed and a single pass. A high-frequency laser pulse will also tend to give a more polished edge.
The most important quality of a plastic that will laser cut well is that it will not catch fire when laser cut. The plastic itself should not be readily flammable, nor should it become a degradation product when heated, melted, and vaporized. Another key quality of plastics that are good for laser cutting is that their degradation products are non-hazardous. Some plastics release toxic fumes when laser cut, which makes them unsuitable for the process.
When choosing plastic for laser cutting, it is important to consider the needs of the end product first. The final product (after laser cutting) will dictate the properties of the plastic that you will need to use. These could be properties like whether the plastic should be transparent or opaque, whether it should be flexible or rigid, and whether it must be tough or could acceptably be brittle.
Another thing to consider when choosing which plastic to use is the appearance of the plastic, such as a specific color, or a glossy finish. The affordability of plastic will also be important.
Once these things have been considered, there will likely be more than one potential plastic that may be suitable. Then the ease of laser cutting each plastic can be considered.
Choose the right plastic for your laser cutting project by taking this approach:
Some materials are not suitable to be laser cut, including:
To learn more, see our guide on the Types of Bad Materials for Laser Cutting.
Yes, Xometry offers Plastic Laser Cutting services, with the ability to start an instant quote immediately. Get one today!
The content appearing on this webpage is for informational purposes only. Xometry makes no representation or warranty of any kind, be it expressed or implied, as to the accuracy, completeness, or validity of the information. Any performance parameters, geometric tolerances, specific design features, quality and types of materials, or processes should not be inferred to represent what will be delivered by third-party suppliers or manufacturers through Xometrys network. Buyers seeking quotes for parts are responsible for defining the specific requirements for those parts. Please refer to our terms and conditions for more information.
If you want to learn more, please visit our website protective tape for aluminium.
Protective film on sheet metal impacts the production process. Yet, suppliers standardise films, at the cost of optimising the cutting process. However, when the volumes are high enough, or if the film is applied in-house, then the manufacturer can choose a more suitable film.
When choosing the film, it&#;s important to find a balance between high adhesion to limit bubbles and low adhesion to make the film easier to remove.
Click to shareA) With this in mind, there are several aspects to consider when choosing a film :
? the cutting technology: fibre laser source or CO2 laser
A fibre laser&#;s wavelength is ten times shorter than that of a CO2 laser and is not absorbed by the plastic. Thus, using a film designed for CO2 laser would create a very uneven cut if used with a fibre laser source. In fact, films specifically for fibre laser cutting have built-in absorbers.
? the material: stainless steel, aluminium, pre-lacquered, etc.
Stainless steel/aluminium: Some materials are highly thermally conductive, e.g., aluminium, copper, etc. In this case, the heat spreads when cutting and can melt the film. The sheet protection for these materials therefore must be adapted, with a higher level of thermal resistance than a film for stainless steel, for example.
Pre-lacquered steel: Cutting pre-lacquered steel can be problematic if the lacquer used is not designed for good laser wave absorption. Even if there are specific films, the lacquer must be adapted, in particular with specific additives.
Double-sided: Double-sided protection can cause a small amount of burring during cutting, because the film on the table side retains the material. It is therefore recommended to use thin films, which reduce, or even eliminate, quality problems.
? Thickness of the sheet metal used
Depending on the thickness, the pressure of the cutting gas is different and therefore does not require the same level of adhesion. As a result, a film designed for thin sheet metal will result in a lot of bubbling if used on thick sheet metal.
? Material finishes: brushed, glossy, scotch-brite, etc.
Adhesion depends on the surface and the film products are adapted to each surface. It is therefore important to take the finish of the material into account when choosing a film.
B) Quality control: how to ensure that the film is suitable and properly applied?
? Specific colour codes and markings enable the operator to identify the type of film for visual inspection. Brice Lequette &#; Novacel explains: "The protective film for a CO2 laser is black on the glue side and white on the outside, whereas for a fibre laser it is black on the glue side and grey on the outside.&#;
? It is important to properly apply the film, especially by limiting its elongation. This is because plastic is a shape memory material that will return to its original size if elongated. Elongation reduces adhesion and the film will therefore be less resistant to gas pressure, leading to an increased risk of bubbling.
A quick test can be carried out to check that the film has been properly applied:
A few visual clues can also alert to any issues, such as small application defects like bubbles, etc.
? The sheet metal should not be cut for 48 hours after applying the film.
Previous: None
Next: Key Considerations for Buying Metallized White PET Film
If you are interested in sending in a Guest Blogger Submission,welcome to write for us!
All Comments ( 0 )