Is ESD-Safe 3D Printing the Right Choice for You?

Electrostatic discharge, a frequently observed natural occurrence, manifests itself through various triggers such as an electrical short circuit, dielectric breakdown, or the interaction between two electrically charged objects (static electricity). This interaction results in a rapid and brief surge of electric current.  ESD is typically generated through two primary mechanisms. The first mechanism is known as tribocharging, which transpires when two materials are brought together and then separated, leading to a disparity in electrical potential. The second mechanism responsible for ESD events is electrostatic induction, which takes place when an electrically charged object is in proximity to a conductive object not grounded. Everyone has experienced an ESD event at some point in their lives. There are numerous everyday life examples of ESD, including lightning, hair static caused by nylon/woolen clothes, a plastic comb or a slide, Styrofoam sticking to the skin, the dust gathering on the TV screen seconds after it was cleaned, the famous “spark” or “kick” when touching a doorknob or another person.

Risks associated with ESD

ESD events are mostly harmless, although annoying, to humans. Static electricity can also be a very useful phenomenon. Technologies based on static electricity are used in photocopiers, electrostatic precipitators in air purifiers, electrostatic spray painting, or dryer sheets/dryer balls. However, in certain contexts, ESD can be very dangerous and have dire consequences, especially in manufacturing or high-risk industries. ESD is very threatening to sensitive electronics, especially integrated circuits, and microchips. They can be permanently damaged (catastrophic or latent damage) when a high voltage current passes through them. This can happen in three ways:

1.     HBM (Human Body Model) – human body transfers an electrostatic charge to a device.
2.     MM (Machine Model)  – a charged conductive object, such as a metallic tool or fixture, transfers an electrostatic charge.
3.     CDM (Charged Device Model) – occurs when an electrostatic charge is transferred through packaging or a work surface.

Electrostatic discharge is also extremely dangerous in environments with potentially explosive atmospheres, such as spaces containing gas, fuel vapor, coal dust or even flour dust.

ESD prevention

ESD prevention is of utmost importance on manufacturing floors, shipment centers, or in spaces with flammable and explosive atmospheres.  There are many antistatic materials, substances and devices elaborated and manufactured especially for the purpose of protecting people and devices from the consequences of electrostatic discharge. ESD protection solutions include:

• Chemical agents.
• Electrical grounding.
• ESD clothing, antistatic wrist straps, ESD jigs and fixtures.
• Antistatic bags for the storage and shipment of electronics.
• Ionizing bars on production lines.
• ESD office furniture.
• Clean rooms designed to keep dust, airborne organisms, or vaporized particles from getting inside, and prevent viruses, harmful substances, or radiation from getting out.
• Antistatic systems of machines using electron or photoemission to reduce ESD.

Proper ESD security can not only protect device malfunction, but also reduce failure-related financial losses and even save lives.

ESD safety in 3D printing

Subtractive production methods, such as injection molding and CNC machining, have been around for a long time and they are great for large-scale production of standardized tools. But when it comes to producing small quantities of highly customized tools, jigs, or fixtures, additive manufacturing is the best option, especially 3D Printing services. The design and making of molds take a very long time and it does not pay off for producing small quantities of customized tools and fixtures. Furthermore, advanced plastics used in CNC machining are very expensive and often waste away during the machining process. Using online 3D printing services to make customized specialistic tools, jigs, and fixtures in-house and on demand is a step forward for many businesses as it has many advantages. If the proper material is used, a 3D printed version of a traditional tool or fixture can be stronger, more resistant to corrosion, lighter, and way cheaper and faster to make in-house rather than through external contractors through injection molding or CNC machining. All this grants manufacturers greater flexibility and the possibility to customize the working processes based on the company’s needs. 3D printing online takes less time, it is more affordable, and it eliminates material waste since only what is needed is going to be printed at a good 3D Printing quote. ESD safety is no exception, since 3D printing Bangalore – the fast adapting discipline that it is – already has a well-tested and reliable solution for making antistatic tools, jigs, and fixtures. ESD safe materials in 3D printing in Bangalore can come in many forms. There are antistatic filaments, pellets, resins, and powders.

Filaments

ESD safe filaments use various technologies to achieve the antistatic properties, the most common ones being carbon black or graphite fillers for 3D Printing services in India. The amount of carbon filler in the polymer determines the level of surface resistivity (measured in Ohms) – electrically conducting, dissipative or insulating. Another way to make a material antistatic is to add antistatic coatings or, as is the case of Essentium, a surface layer of conductive nano polymers to reduce the risk of performance degradation commonly seen with ESD fillers or coatings to 3D Print online by 3D Printing companies. Almost all polymers commonly used in 3D printing have an ESD safe option. There are antistatic standard plastics (ABS, PLA) and engineering plastics (PA, PET, PCTG), as well as antistatic plastics designed for advanced applications (PEKK, TPU) for online 3D Printing India.  There are antistatic filaments designed for specific sectors, such as the Essentium TPU 58D-AS from the family of flexible advanced filaments. Apart from applications in the aerospace industry, this filament can be used to 3D print abrasion-resistant panel covers, ESD-safe storage boxes or ESD-safe dust caps. Dust and other particles tend to accumulate static electricity and provoke system failure in many electronics factories.

Resins and powders

There are also non-filament options for 3D printing ESD safe objects, such as resins for SLA 3D printing, and powders for SLS 3D printing. They all have excellent properties, depending on the plastic and intended applications – ranging from the automotive industry and scientific-technical instrumentation to consumer electronics for 3D Printing in India.  ESD-safe resins and powders are good for 3D printing anti static tools, jigs and fixtures for the production, assembly and testing of electronic components, as well as for the production of components for use in explosive atmospheres. Some ESD-safe materials even have dust repelling properties. As mentioned before, dust and other particles tend to accumulate static electricity and increase the risk of ESD events. Since most plastics attract dust and dirt, using an ESD-safe option is much safer in ESD-sensitive environments for 3D Printing service in India.  One such material is the Formlabs ESD resin, which can be used to 3D print tools and fixtures for even the most demanding manufacturing conditions with affordable 3D Printing services. Watch: https://www.youtube.com/watch?v=vfzCF6VGhHc

ESD accessories

ESD safety in the 3D printing world isn’t only limited to printing filaments, resins, and powders. There are also various cleaning agents and accessories that ensure ESD safety during the printing process or the maintenance of the 3D printer. The Lawang ESD precision tweezers are useful when it comes to removing parts from the build plate, cleaning material out of the nozzle, removing supports or printer maintenance. To minimize the risk of an ESD event that could damage the 3D printer’s electronics, it is recommended to use the ESD safe precision tweezers while 3D Printing bangalore. Another precaution to take at the time of 3D printing is ensuring the printing surface is free of dust, particles, and static electricity. One way to ensure that is to use a cleaner of some sort, for example the Novus 1 acrylic cleaner for resin tanks. It cleans plastics without scratching them and prevents fogging, repels dust, and eliminates static charge. It is crucial for successful SLA prints because dirt in the resin tank can deflect the laser and result in failed prints for 3D Printing services Mumbai. The 3D printing industry is up to the task of satisfying the needs of even the most demanding industries that require tools, materials and technologies that can ensure not only superior performance but also versatility of uses and safety. Materials with ESD-safe properties can be found in FDM printing (antistatic filaments and pellets), SLA printing (ESd resins), and SLS (anti-ESD powders). The safety of printing surfaces is also covered thanks to ESD-safe 3D printer maintenance tools and cleaning accessories.

Conductive Filaflex

Have you ever wanted to create something with your 3D printer that included electronic components? Perhaps sensors, conductive traces or shielding against radio frequency noise? The FFF/FDM conductive filaments for 3D printing Chennai have been designed for users interested in combining 3D printing in Chennai and electronics. Conductive assemblies that integrate switches, potentiometers, LEDs, capacitive touch sensors… All this and much more is possible thanks to them. Specifically developed to enable 3D printing of electronically conductive components, conductive filaments are materials that are very easy to print and compatible with almost any FDM/FFF 3D printer on the market.

Applications

Its applications are many and varied, but the following stand out in particular:

• Sensors

The conductive filament can be used to create capacitive (touch) sensors used in a wide range of electronic products that are used in everyday life; It is an excellent material for the design of human interface devices (stylus pens for mobile phones and tablets). Capacitive sensing sensors can also be used to measure proximity, position, humidity, liquid levels, and acceleration.

• Conductive tracks

Another application of the conductive filament is in the creation of circuits conducting electricity for uses in electronics which, in the case of flexible conductive filaments, will also be applicable to flexible electronics. Traditionally, in order to add conductive circuitry to their creations, 3D printing enthusiasts had to design parts with the necessary grooves to add copper wire after printing. With the conductive filament, the wiring can be printed simultaneously with the construction process of the piece.

Shielding against radio frequency noise and electromagnetic interference

The high conductivity offered by the conductive filament is not only excellent for 3D printed circuits and sensors, it is also useful for use against EMI (Electromagnetic Interference) and in very important RF (Radio Frequency) shielding applications in a wide range of applications. range of industries. EMI/RF shielding is used to block the electromagnetic field and radio frequency electromagnetic radiation within a space; It is important to use EMI and RF shielding in hospital, laboratory, or aerospace industry settings to protect against competing signals, as these can lead proprietary equipment to give false measurements. EMI/RF shielding accomplishes this by blocking AM, FM, TV, emergency services, and telephone signals. Conductive filament is ideal for designing RF/EMI shields used in highly custom items.

Tips for use

Designed for use with prints intended for room temperature operation and for use on low voltage, low current projects only (not to exceed 12 volts ), conductive filaments should be avoided for power supply exceeding 100mA. Printing with conductive filaments (PLA) is almost as easy as printing with standard PLA. It is not necessary to have a 3D printer with a heated bed, although if you do have one, it is recommended to use the heated bed at 50-60º C since greater adhesion is obtained with 3D Printing services in Chennai. Possible contamination of the conductive filament with dirt from hands or dust from the environment should be avoided as much as possible, so it is recommended storage in a dry place and away from these and/or other particles. It is also recommended to wash your hands before and after use and treat it with gloves. The user should avoid prolonged exposure to moisture. A nozzle is recommended for printing conductive filament of at least 0.4 / 0.5 mm. The 3D printer nozzle should always be washed before and after using the filament to avoid printing complications. Conductive filament tends to stick to brass nozzles, so it is recommended to clean the external surface of the nozzle before printing with oil (technical or domestic) or lubricant to reduce build-up of the material on the outside of the nozzle during printing. You can also use plastic-repellent paint. The intrinsic properties of the conductive filament are such that it should not be left idle in the extruder of the 3D printer (while not printing) as it can expand and cause clogging of the nozzle ( clogging). Therefore, after printing, the filament should be removed as soon as possible from the extruder and use cleaning filament. cleaning. It is also very important to print at the recommended temperature, since if you print at a lower temperature, the viscosity of the melt will not be optimal, so it will expand and clog the nozzle; and in case of printing it at a higher temperature, it will result in a partial degradation together with a substantial aggregation of nanomaterials also producing nozzle clogging. In the event of a total obstruction of the nozzle, try to unclog it by heating the nozzle to 200ºC and try to remove the obstruction with a copper wire, or try to melt ABS or PLA (rigid filaments) to drag the material trapped, or soak it in acetone, etc. In case of not being able to solve the problem, it will be necessary to change the nozzle for a new one. To avoid this, all the advice mentioned above must be considered while 3D Printing in Chennai. On the other hand, it is also very important to have the base of the 3D printer perfectly level, otherwise a significant amount of material will accumulate on the external surface of the nozzle, which when solidified will clog the flow of the melt. Therefore, the outer surface of the cooled mouthpiece should be cleaned with alcohol if this happens.

Read More: Streamlining Your Search: Large-Format 3D Printer Selection Guide for Massive 3D Prints