Tiếng Việt
Vietnam is growing a number of large-format 3D printer manufacturers, with strong applications in casting, advertising, sand mold patterns, silicone mold patterns and more. It is a good sign for how the country is adopting and developing technology in line with the global Industry 4.0 trend. Large-format 3D printers are set to become a new trend, saving labor and cost while improving product quality.
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Vietnam adds more large-format 3D printer manufacturers
Technology is moving at breakneck speed and touching every part of life. Each step forward in one field sets up related fields to leap ahead further than ever. Mechanical engineering, machine building and metallurgy are a clear example of fields that push each other forward.
Take casting, for example. Using 3D printers in production has opened a whole new chapter for the casting industry, especially for investment casting and lost-foam (burnout) casting. 3D printing makes designing and testing new casting molds much faster. In the past, going from a part design idea to test casting, evaluation and mold correction took about 8 to 10 weeks (sometimes longer). Today, with 3D printers, testing a new part takes only 1 to 2 weeks. That saves a lot of time and cost on pattern molds. It marks a remarkable shift for the casting industry. “The only limit is human creativity.”
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Contact CT3D Group
CT3D Group – professional 3D printing, 3D scanning, design and rapid prototyping services nationwide.
- CT3D Thu Duc – Ho Chi Minh City, Hanoi, Hai Phong: in3d.edu.vn – Hotline 0975 008 728 (Mr. Thai)
- CT3D District 6 – Ho Chi Minh City: 3dmaker.vn – Hotline 038 7798308 (Mr. Phuc)
How are large-format 3D printers used in casting and mold making?
The strength of a large-format 3D printer is that it can produce big patterns in one piece or in just a few sections, instead of the manual carving, turning and wood joining used before. In casting, a 3D print can serve as the master pattern for a sand mold, or be printed in a burnout material for lost-pattern casting. In statues and décor, the print is an intermediate step for making a silicone mold, which is then filled with composite, polyresin or plaster to make copies.
- Sand mold patterns: print the pattern at a size that compensates for metal shrinkage, and finish the surface and draft angles before molding.
- Silicone mold patterns: print, sand and prime the pattern smooth, then cover it with silicone for mass copying.
- Advertising and displays: 3D letters, logos, scaled-up product models and event mascots.
- Architecture: scale models, relief details and decorative patterns before real construction.
Things to watch when printing large parts
Large-format printing is not just scaling up a file. Print time grows quickly with size, so layer height, shell thickness and infill density need to be balanced between strength and time. With FDM materials like PLA, large parts warp or crack between layers easily if the print environment is not thermally stable. Parts larger than the build plate must be split into several pieces with locating pins for accurate assembly, then the seams are filled and the surface finished.
For patterns used to make molds, surface quality decides the quality of the final product. Layer lines will imprint on the silicone or sand mold, so the pattern usually needs sanding, filler and primer before molding. If the pattern has fine ornamentation, the small details can be printed in resin and the large body in FDM, then joined.
Buy your own machine or use a printing service?
A business with constant printing needs, varied parts and staff to run the machine gains control over its schedule by investing in a large-format printer. On the other hand, if your needs are project-based or the volume is still unclear, using a 3D printing service avoids the cost of buying, maintaining and learning to run a machine, and you benefit from a professional shop’s surface finishing experience.
Frequently asked questions
What technology do large-format 3D printers usually use?
FDM plastic extrusion is the most common, because material is cheap and the build volume is easy to scale. There are also large-format SLA machines for smoother surfaces and dedicated sand printers for foundries, but they cost much more to buy.
Can a 3D printed pattern be used directly for a sand mold?
Yes, but the pattern has to be designed correctly: compensated for metal shrinkage, with draft angles and a smooth surface. FDM patterns should be printed with thick shells and reinforced so they do not deform when the sand is rammed.
What if the object is bigger than the build plate?
The model is split into several parts in software, with locating pins or joints added, printed separately and glued together. The seams are then filled, sanded and painted for a seamless surface.
Which material suits large display models placed outdoors?
PETG or ASA usually handle heat and UV better than PLA. Whatever the material, outdoor models should get a protective paint coat. For long-term pieces, it is better to make a mold and cast in composite rather than use the print itself.
Is large-format 3D printing cheaper than handmade patterns?
It depends. For complex shapes, tight accuracy or designs that change several times, 3D printing usually saves time and money. For simple blocks, CNC-cut foam or handwork can still be more economical.
Related services at CT3D Group
- Silicone molds and vacuum casting
- On-demand 3D printing service
- High-accuracy 3D scanning service
- CT3D Group network: ct3dgroup.com · in3d.edu.vn – Hotline/Zalo 0975 008 728
