Key 3D Printing Tips You Need to Know in Your School
Using 3D printing in the classroom is a fantastic idea. As a medium, it brings concepts to life and imparts knowledge of technology, problem-solving, and design. Be that as it may, it is not without its dangers. To keep their children safe while they learn, teachers must anticipate and mitigate these dangers. For both K-12 and maker-space environments, this blog offers simple and actionable safety advice.
Why Safety Matters in the Classroom?
Printing with a desktop 3D printer might release tiny particles and toxic chemicals. Ultrafine particles and volatile organic compounds (VOCs) are part of these emissions, and studies have shown that they can have an impact on air quality and human health if not managed properly. Hot surfaces, moving components, sharp instruments, and chemical exposures during post-processing are some of the physical hazards posed by printers, in addition to emissions. Lessons go smoothly, students stay healthy, and teachers avoid injuries by practicing good safety.
How Teachers Can Keep Students Safe While 3D Printing?
1. Know the Common Hazards Before You Teach
You ought to be familiar with a handful of danger types. First, there are airborne risks. When printing or curing, many resins and filaments produce ultrafine particles or volatile organic compounds. Vulnerable students may have irritation of the eyes, nose, and throat from these.
Secondly, there are mechanical and thermal dangers, such as motors, hot nozzles, and heated beds, all of which can cause burns.
Thirdly, hazardous or irritating chemical dangers during post-processing, such as adhesives, resins, solvents, and some paints.
Fourth, there are physical risks associated with breakdown. Young toddlers can easily cut themselves or choke on sharp edges or brittle parts. You can better select controls and classroom regulations if you are familiar with these types.
2. Set Up the Classroom for Safety from Day One
The place is important; designate a specific spot for printers. A well-ventilated, stable, and easily-cleaned area is ideal. Put printers in rooms with adjustable mechanical ventilation or near windows if you can. Use filtered enclosures with high-quality filtration at a minimum, or opt for local exhaust venting outside as the best practice. Students should not push or stomp on printers, so make sure there is enough space around them. Put printers where the instructor can keep an eye on each print job.
3. Ventilation and Air Quality: Don’t Guess, Control It
Deliberate ventilation is necessary due to the reality of emissions. It is best to have enclosed printers that have their exhaust vented outside. Use 3D printer-specific enclosures with HEPA and activated carbon filters if airflow from outside sources isn't an option.
Make sure to turn up the classroom fan speed when printing, and plan to print when no one is in the room. If you want to know how your printers make the room feel before you start printing, you might want to look into particle counters for indoor air monitoring. Reducing exposure for staff and students is best accomplished through these engineering controls.
One useful option is the CalmDo True HEPA Air-Purifier, which is sized for classrooms. With its True HEPA filter, this little air purifier is able to successfully trap particles as small as 0.3 µm, capturing at least 99.97% of them. Although 3D-printed UFPs may be smaller, research shows that HEPA filters still capture much lower concentrations because particles tend to congregate or cling to bigger ones. For classrooms without exhaust systems, it's a cheap approach to enhance ventilation.
4. Choose Printers and Materials with Safety in Mind
Contrast the quality of various printers and materials. Pick out printers with enclosed builds or ones made specifically for use in the classroom. Try to get versions that include instructions on adjusting the fan speed and direction for classroom use. Most educators agree that PLA filaments are better for use in schools than higher-temperature filaments, as they produce fewer chemicals during printing.
Avoid printing materials containing hazardous metals, specialty filaments with unknown additives, or resins when students work on their projects unattended. Adhere to the safety protocols outlined in the manufacturer's safety data sheet (SDS) and ensure enough ventilation when working with resins, as they are potentially hazardous substances.
5. Personal Protective Equipment (PPE) and Safe Procedures for Post-Processing
Students should wear protective gear while working with solvents, sandpaper, cutting, or resin. Basic personal protective equipment (PPE) includes goggles, nitrile gloves (for working with solvents or resins), and, if necessary, breathing protection. To avoid exposure to volatile organic compounds (VOCs) and ultrafine particles, it is necessary to wear a respirator with the proper cartridges and undergo appropriate training.
Remind your pupils to always wait for printed components to cool before handling them and to always use hand tools safely. Mark containers containing chemicals and ensure that MSDSs are readily available.
6. Administrative Controls: Rules, Scheduling, and Supervision
Ventilation and other engineering controls are critical, but regulations are equally important. Put a cap on how many kids can be near an active printer. Put up a set of detailed instructions near the printers. To prevent printer overpopulation, use sign-in sheets or make reservations in advance. Avoid busy times or areas with older students or employees when the prints are particularly heavy or smelly. Educate yourself and your employees before letting them handle printers; younger grades may need adult supervision. The operational procedures that bring engineering controls to life in a real-world setting are known as administrative controls.
7. Cleaning, Maintenance, and Housekeeping Routines
Keep the printer and its surroundings clean by wiping down the surfaces after each print. To avoid reinjecting dust and debris into the air, use a moist cloth or a hoover with a HEPA filter to pick up debris. Immediately follow the manufacturer-recommended procedure to clean up any resin spillage.
Be sure to follow the manufacturer's maintenance guidelines for printers to avoid any potential problems caused by parts failing. When not in use, put cutters, sandpaper, and solvents away in a lockable cabinet. Empty trash cans into the proper bins regularly. Regular cleanings lessen the likelihood of exposure and mishaps.
Emergency Planning and Training for Staff
Put up signs with the essential emergency measures close to the printers. Burns, chemical contact, and minor wounds all require specific first aid procedures. Prior to handling any resins or solvents, ensure that there are eye-wash stations readily available. Make sure that two employees know how to rapidly turn off the ventilation and printers. Practice procedures for minor burns and resin spills to ensure employees respond appropriately and calmly. Consistent practice lessens nerves and maximizes preparedness in the face of an actual crisis.
Age-Appropriate Rules for Students
Children under the age of six need stricter rules and greater adult supervision.
- Students in elementary school should not handle hot materials or parts without a teacher's supervision when printing.
- With proper training, personal protective equipment, and supervised access to post-processing tools, older pupils can take on additional responsibility.
- When assigning duties to students, use their age as a reference, and make sure that staff are in charge of any activities that pose a higher risk.
Working with Your School and Parents
Talk to the principal about training, ventilation, and the funding for enclosures or filters. Discuss your safety plan with the parents so they understand how you'll handle potential dangers. Obtain written approval when necessary and explain the need for precautions, personal protective equipment (PPE), and these abilities before using higher-risk materials or advanced post-processing. Building confidence and securing support for critical safety measures are both aided by clear communication.
Quick Teacher Checklist to Follow Before Starting Classes
- Turn on the ventilation and set up the printers on solid surfaces.
- The workspace is organized, the personal protective equipment (PPE) is ready, and the material safety data sheets (SDS) are accessible before every class that has prints scheduled.
- Post a brief incident plan, designate supervisors, and go over the safety guidelines with the pupils.
This brief pre-class procedure addresses many common issues and sets the stage for pupils to learn with confidence.
Which Is the Best 3D Modeling Software?
There are many CAD software available for education, but we recommend using SelfCAD. It is an easy to use program that comes with easy to use 3D Modeling tools like shape generators, for instroducing basic geometry and spatial thinking, while Transform tools like (Move, Scale, Rotate, Mirror) teach object manipulation, and boolean tools (Union, Difference, Intersection) help students understand solid geometry concepts. The drawing and sketching tools support creative thinking and technical drawing skills, making them useful for STEM and design classes.
In addition, SelfCAD includes Sculpting tools that help students explore organic shapes and artistic design, which is ideal for art and creative technology education. Mesh and Repair tools teach students how to fix and optimize 3D models, building problem-solving skills. The built-in online slicer is helpful in slicing the files and generating the G-code to send to the printer.
The software also comes with interactive tutorials useful for learning how the software works.
Creating a Safe 3D Printing Workflow for Students
One of the most effective ways to develop both technical skills and creativity is through 3D printing. Good planning can make the hazards bearable. Choose safer materials, implement transparent administrative regulations, provide personal protective equipment (PPE) and training, maintain a clean work environment, and use engineering controls such as enclosures and ventilation. By following these steps, you can establish a 3D printing program that is both safe and inspiring, with a lasting impact on children.