With the rapid iteration of artificial intelligence and the in‑depth optimization of China’s industrial structure, sand‑mold 3D printing technology is reshaping the production model of the traditional foundry industry. It breaks the bottlenecks of traditional processes in efficiency, cost and the forming of complex castings, and realizes the whole‑chain value upgrade from product R&D to mass production. Xinda‍‌‍‍‌ is constantly developing new types of specialized material for mold/sand printing, constructing a comprehensive set of products and a complete solution process. It strictly controls the quality of the whole process from resin synthesis to on‑site application, which allows premium materials to enhance the quality and efficiency of the foundry industry.

I. Special 3D Printing Resin for Shell Molds

Xinda's new special 3D printing resin for shell molds delivers performance comparable to shell‑mold coated sand processes. It effectively addresses long‑standing industry challenges including poor sand‑spreading fluidity, insufficient core strength, sand shedding during pouring, and difficult shake‑out after casting. Five core advantages empower end‑user production.

1. Outstanding‍‌‍‍‌ mechanical strength ensures stable performance in pouring and shake‑out. The green sand model has top overall strength, sand not shedding during the casting, and the removal of the casting after production is simple and very effective, which reduces the costs of labor for post‑processing.

2. Very low content of formaldehyde and low smell to make the workshop environment healthier.The product contains less than 0.2% free formaldehyde and emits very low amount ofVOC.The production area pungent smell has been significantly suppressed,which has greatly improved workplace environment for frontline workers and met the green factories standard requirements.

3. Formula of low corrosion level and printing equipment compatibility that increases the longevity of the nozzle.Material has characteristics of not only being hardly corrosive but also highly compatible with 3D printing nozzles, it minimizes clogginess and wear of nozzles to reduce equipment maintenance costs.

4. Low‑corrosion formula compatible with printing equipment to extend nozzle service life. The material features low corrosivity and high compatibility with 3D printing nozzles, reducing nozzle clogging and wear to lower equipment maintenance costs.

5. Fairly versatile formula for high‑end casting production in various industries. The product is largely suitable for the high‑end hydraulic components, aerospace castings, mining engineering machinery, premium ceramic parts and other types of precision high‑end manufacturing ‍‌‍‍‌areas.

II. 3D Printing Resin ZY3D‑01

ZY3D‑01 is a self‑developed 3D printing resin for binder jetting technology by Xinda. It specifically solves three major industry pain points: frequent nozzle clogging, strong workshop odour and excessive resin consumption.

1. Greater‍‌‍‍‌ mechanical strength to minimise resin quantity

   ZY3D-01 can be a great mechanical strength enhancing material. In comparison with products of a similar nature, ZY3D‑01 provides an increase in tensile strength of more than 15 % and an improvement in compressive strength of over 20%. If resin is to be reduced under the same strength requirements to save material costs.

2. Faster reaction speed and better curing efficiency

   By not containing highly corrosive phenol parts of it, we can see the resin is quick to cure. Furthermore, the formulation can work well with hardeners of lower total acid value for a stronger process adaptability.

3. Eco‑friendly composition for low‑emission production conditions

   With a small free‑formaldehyde index, the resin cures quickly. As very little of the solvent is emitted during printing, this results in less odour in the workshop and improved working conditions.

4. Making use of the less casting defects to upgrade the quality and reduce the costs, the lesser amount of the resin and a lower hardener acid value reduce the gas content of the mould and core which will significantly reduce the casting porosity. Rapid curing is an extra layer of protection for the quality of the castings and prevents defects like sulfur penetration and nodularisation from happening.

5. Product that is equipment‑friendly

   The resin has only light corrosion effect. It works with the widely used inkjet printing setups. Also, it keeps the print heads from wearing out and the lifespan of important parts is ‍‌‍‍‌prolonged.

Drawing on dual technical accumulation in material synthesis R&D and foundry process application, Xinda has established a full‑range product portfolio covering 3D printing resin and matched hardeners. Personalised material selection and process implementation are offered by means of customer diversity. Future, Xinda, as a company, is going to carry on its investment for research and development of new 3D‑printing foundry materials. This business makes use of the new materials that are environmentally friendly with low volatile material, high strength and machinery-friendly characteristics in order to promote the digital and intelligent transformation of our country's foundry ‍‌‍‍‌industry.