The Digital Transformation Power Reshaping the Foundry Industry

In the wave of transformation sweeping through the traditional casting industry toward digitalization, intelligentization, and green practices, 3D printing sand-mold technology—with its unique advantage of “moldless forming”—has broken through many longstanding bottlenecks in conventional sand-mold casting, such as reliance on molds, lengthy production cycles, and difficulties in shaping complex structures. As a prime example of the deep integration between additive manufacturing and traditional casting processes, this technology not only dramatically elevates the design freedom of castings but also propels the casting industry from an “experience-driven” model to a “data-driven” one, making it an indispensable core supporting technology in the high-end equipment manufacturing sector. From smart factories featuring shared equipment to Yaqi Foundry’s large-scale overseas orders, 3D-printed sand molds are wielding powerful industrial penetration, reshaping the global competitive landscape of the casting industry.
 

I. The Core Principles and Process Flow of 3D-Printed Sand Molds

3D printing sand mold technology is essentially a specialized application of binder jetting additive manufacturing in the casting field. Its core principle is based on 3D model data: a nozzle precisely jets a binding agent onto layers of sand deposited by a sand spreading system, causing the sand particles in specific areas to undergo a solidification reaction and bond together to form a shape. By layering these bonded sand layers one after another, a complete sand mold or sand core is constructed. Unlike traditional sand mold casting, which involves complex processes such as pattern preparation, sand compaction, and mold assembly, 3D-printed sand molds enable a direct transformation from digital models into physical sand molds. The key advantages of this approach lie in its “moldless” nature and its “precise and controllable” capabilities.

The complete 3D-printed sand mold manufacturing process can be summarized in four key steps: First is digital model preparation, during which 3D models of both the casting and the sand mold are created using CAD software. Simultaneously, simulation software such as Magma is employed to model the flow and solidification of molten metal, optimize the gating system and venting structure of the sand mold, and proactively identify and avoid potential casting defects. Second is pre-printing preparation: Based on the material and performance requirements of the casting, suitable sand materials (such as quartz sand, high-silica sand, coated sand, etc.) and environmentally friendly binders are selected, and parameter adjustments are made on the printing equipment. Next comes automated printing: The equipment uses a sand-spreading roller to lay down a uniform layer of sand, while print heads precisely spray binder according to the sliced model data. After curing, the hardened sand layer moves downward with the forming platform, and the process of sand spreading, binder spraying, and curing is repeated until the entire sand mold is printed. Finally, there’s the post-processing stage: The printed sand mold undergoes drying and strengthening treatment to remove internal moisture and residual binder, ensuring that the mold’s strength meets the requirements for casting. Once this step is completed, the mold can proceed to subsequent casting operations, such as box assembly and pouring.

II. The Core Advantages of 3D-Printed Sand Molds: Breaking Through the Multiple Constraints of Traditional Casting

Compared to traditional sand-mold casting processes, 3D-printed sand molds demonstrate unparalleled advantages in terms of production efficiency, molding quality, and environmental performance, making them a key technology for addressing the pain points in the casting industry.

First, it significantly shortens the R&D and production cycle. Traditional sand-mold casting typically requires weeks or even months to fabricate wooden or metal molds. In contrast, 3D-printed sand molds can bypass the mold-making stage altogether; the transformation from a digital model to a physical sand mold takes only a few days, reducing the product development cycle by more than 50%. This “rapid-response” capability is particularly well-suited for small-batch and customized casting production, as well as for rapid iterative testing of new products, helping companies seize market opportunities ahead of their competitors. For example, Xinghua Dishan Printing Technology has introduced 3D-printed sand-mold equipment, bidding farewell to the traditional “sand-casting” approach and slashing the production cycle for complex castings from several months down to just a few days.

Second, it unlocks the capability to produce complex structural components. Traditional sand-mold casting is constrained by mold design, and intricate internal cavities or irregular channels often require the fabrication of multiple separate sand cores that must then be assembled together—leading to defects such as misaligned cores and porosity. In contrast, 3D-printed sand molds enable integrated molding. No matter how complex the internal cavity, hollow structure, or unconventional geometry, these can be precisely built up layer by layer without the need for disassembly or assembly, significantly enhancing the structural integrity and dimensional accuracy of castings. Boto Yaqi Foundry has leveraged 3D-printed sand-mold technology to produce sand cores for hydraulic motor casting housings, successfully securing an order worth over 30 million yuan from a well-known German company—precisely because of its ability to accurately form even the most intricate structures.

Third, enhance casting quality and production stability. 3D-printed sand molds achieve precise control over sand layer thickness and binder spray volume through digital control, resulting in uniform mold density and high surface finish. As a result, the dimensional accuracy of castings can be improved by one to two grades, significantly reducing the amount of material needed for subsequent machining. Meanwhile, the entire printing process is fully automated, eliminating quality fluctuations caused by manual operations and cutting the casting defect rate by approximately 20%. The smart factory built by Shared Group through its “3D+” transformation has seen a 3- to 5-fold increase in production efficiency compared to traditional factories, with markedly enhanced stability in casting quality.

Fourth, we are putting into practice the concept of green manufacturing development. In the 3D-printed sand mold production process, the sand materials primarily consist of natural raw materials such as quartz sand, which remain solid throughout the entire process and are odorless. Moreover, uncured sand particles can be recycled and reused in real time, achieving a comprehensive recycling rate of over 96% for waste sand. At the same time, the use of environmentally friendly binders reduces harmful gas emissions from the source. Coupled with dust removal systems, this approach enables clean production—“using sand without seeing sand, generating dust without seeing dust”—effectively addressing the environmental challenges inherent in traditional casting processes. Furthermore, the biodegradable resin materials used by Feimede Company for mold printing further enhance the environmental advantages of 3D-printed sand molds.

III. Industrial Applications of 3D-Printed Sand Molds: From High-End Equipment to General-Purpose Manufacturing

Leveraging its unique technological advantages, 3D-printed sand molds have already achieved large-scale applications in multiple manufacturing sectors, particularly demonstrating their core value in high-end equipment manufacturing and the production of complex castings.

In the field of construction machinery, 3D-printed sand molds are used to manufacture complex core components such as hydraulic pump housings, engine cylinder blocks, and transmission housings. These components often feature intricate oil passages and water jacket structures. By precisely constructing these internal channels with 3D-printed sand molds, we can ensure stable hydraulic and cooling performance, thereby enhancing the reliability and service life of construction machinery.

In the aerospace industry, 3D printing sand mold technology is well-suited for producing medium- and small-sized precision castings, such as auxiliary components for aircraft landing gear, roughcast engine blades, and satellite supports. These castings have extremely high requirements for dimensional accuracy and structural strength, and are often produced in small batches. By balancing precision, efficiency, and cost considerations, 3D printing sand mold technology provides crucial support for the lightweighting development of aerospace equipment.

In the automotive manufacturing sector, 3D printing sand mold technology is primarily used for the small-batch production and customized development of components such as motor housings for new-energy vehicles, battery trays, and complex parts for conventional vehicle engines. As the automotive industry undergoes a transformation toward intelligence and lightweight design, the demand for complex-structure castings is steadily increasing, making 3D printing sand mold technology an essential support for innovative automotive component design.

In addition, 3D-printed sand molds are gradually being adopted and promoted in fields such as agricultural machinery manufacturing, medical devices, and mold production. For instance, complex transmission components in the agricultural machinery industry, customized supports for medical devices, and large, intricate cavity molds in the mold-making industry—all have achieved high-quality production through 3D-printed sand-mold technology, thereby driving technological upgrades in these related industries.

IV. Global Market Dynamics and Development Bottlenecks: The Rise of China’s Influence and Directions for Breakthroughs

From a global market perspective, the 3D-printed sand mold sector is undergoing a profound restructuring of its competitive landscape. The two major German companies—ExOne and Voxeljet, which once dominated binder jetting technology—merged through a capital integration in 2025 to form ExOne Global Holdings, aiming to leverage complementary technological strengths and reshape the global competitive dynamics. Meanwhile, the Chinese market is following a unique development path characterized by “industry application driving technological breakthroughs.” Domestic manufacturers such as Aisikai, Easy3D, and Shared Equipment are accelerating their independent R&D efforts and achieving leapfrog advancements in both core technologies and industrial applications. Aisikai has successfully localized its self-developed multi-laser metal printing head, while Shared Equipment has successfully developed China’s large-format, industrial-grade 3D printing equipment for casting. Chinese manufacturers are transitioning from being “followers” to becoming “leaders” in this field.

Despite the rapid development of the industry, 3D-printed sand molds still face several bottlenecks that urgently need to be overcome: First, the variety of materials available is limited—currently, the types of sand and binders that are compatible are relatively few, and some high-end materials rely on imports, which restricts their application in the production of castings made from special materials. Second, equipment costs remain high; industrial-grade 3D-printed sand mold equipment typically sells for several million yuan, making it difficult for small and medium-sized enterprises to afford and thus hindering the widespread adoption of this technology. Third, printing efficiency needs to be improved—compared to the mass-production model of traditional sand-mold casting, 3D-printed sand molds still lag behind in terms of efficiency when it comes to large-scale manufacturing scenarios.

V. Future Outlook: Technological Convergence and Upgrading of the Industrial Ecosystem

Looking ahead, 3D-printed sand mold technology will evolve toward “deeper technological integration, continuously decreasing costs, and a gradually improving ecological framework.” On the technological front, it will be deeply integrated with technologies such as artificial intelligence and big data, enabling adaptive optimization of printing parameters and intelligent, end-to-end control over the entire production process. The nested process model of “3DP complex cores plus resin-sand outer molds” will become even more mature, facilitating low-cost mass production of complex, high-precision castings. At the industrial level, as domestically produced equipment becomes more widespread and breakthroughs are made in material technologies, the costs of both equipment and consumables will gradually decline, thereby promoting the adoption of this technology by small and medium-sized enterprises. Meanwhile, the industry will develop a complete industrial ecosystem encompassing “equipment R&D—material production—printing services—casting processing,” further unlocking the full value of this technology.

CONTEXT: Chris Connery, Vice President of Global Analysis, pointed out that although the short-term industrial-grade 3D printing market has experienced fluctuations due to macroeconomic factors, pent-up demand remains strong, and a robust recovery is expected by 2026. As an important branch of industrial additive manufacturing, 3D-printed sand molds are set to play an even more central role in the digital transformation of the casting industry. From capital consolidation among global giants to independent breakthroughs by Chinese manufacturers, and from high-end equipment manufacturing to general industrial production, 3D-printed sand molds are leveraging digital power to reshape the casting industry ecosystem, guiding the traditional casting sector away from its “clunky, bulky, and low-tech” image and into a new era of “precision and intelligence.”