In response to the global low-carbon development trend of the foundry industry and to address prevalent industry pain points in steel casting including heavy odors, hot cracking defects of castings and failure to meet environmental protection standards, the R&D team of Xinda Resin has successfully developed a low-VOC eco-friendly no-bake furan resin for steel castings. Boasting high performance, low pollution and high cost-effectiveness, it serves as the preferred binder material for steel foundries to realize "green casting".

I. Core Product Advantages Targeting Key Production Pain Points of the Steel Casting Industry

1. High curing activity with rapid early strength build-up for drastically improved production efficiency

   The low-VOC eco-friendly no-bake furan resin for steel castings from Xinda features higher molecular activity, fast curing speed and a steep strength rising curve. Under the same usable working time, the early strength of molding sand is far superior to conventional ordinary furan resins.

   
   

2. Excellent thermoplasticity that drastically reduces cracking defects in steel castings

   Special plastic modifying components are incorporated during the synthesis of Xinda's low-VOC eco-friendly no-bake furan resin, delivering outstanding thermoplastic performance of molding sand. Multiple comparative tests verify that with the same resin addition amount, the total crack length of castings produced with Xinda's low-VOC eco-friendly no-bake furan resin is far lower than that of traditional furan resins and competing products on the market.

   For heavy and complex steel castings used in mining machinery and heavy-duty equipment, this resin delivers remarkable anti-hot-cracking performance, effectively cutting casting rejection costs.
   

   
   

3. Low formaldehyde and low odor to comprehensively upgrade workshop working environment

   Environmental protection constitutes the core highlight of this furan resin. Its free formaldehyde content is ≤0.1%, and liquid-phase formaldehyde emission stands at merely 0.4386%, nearly half lower than mainstream competing products (with formaldehyde emission of 0.8534%). As formaldehyde is a Category 1 carcinogen, this product drastically cuts hazardous gas emissions. Only a faint mild fragrance is released during molding and pouring, while pungent sulfur dioxide odors are substantially reduced. It thoroughly improves the working environment for frontline workers and satisfies dual requirements of factory occupational health and environmental assessment compliance.

II. Standardized Sand Mixing Process for Easy Implementation and Adjustment

1. Standard sand mixing procedure

   The furan resin addition amount accounts for 0.7%–1.2% of raw sand weight, and the curing agent dosage is 30%–60% of resin weight. The sand mixing sequence is as follows: fully homogenize curing agent with raw sand first, then add resin and stir. Control sand mixing duration between 5 and 60 seconds, and discharge sand for molding immediately after stirring to prevent premature failure of molding sand.

2. Flexible optimization of addition amounts

   Subject to raw sand grain size, clay content and casting size & complexity, enterprises may lower resin addition as much as possible on the premise of meeting molding sand strength standards. On-site trials at multiple large state-owned mining steel foundries validate that under identical production conditions, Xinda Wolde resin delivers far higher strength than original competing products, allowing a direct 10% reduction in resin dosage. Under mass production conditions, resin consumption can be cut by 30 to 40 tons annually, directly saving approximately RMB 400,000 in production costs.

3. Curing speed adjustment solutions

   Slow curing: Slightly raise the curing agent proportion (upper limit 70%) or switch to high-activity curing agent;

   Over-fast curing: Reduce curing agent dosage (lower limit 30%) or adopt slow-curing curing agent.

III. Mass Customer Field Test Verification: Comprehensive Performance Superiority

Mass production tests on multiple heavy-duty steel castings prove that Xinda's low-VOC eco-friendly no-bake furan resin for steel castings outperforms traditional resins and market competitors in overall performance, with distinct on-site advantages as outlined below:

• Outstanding strength performance: As shown in the preceding table data, tensile and compressive strengths at 0.5h, 1h, 2h and 6h all exceed those of original furan resins. Superior early strength directly shortens mold stripping time and boosts overall workshop production capacity;

• Greatly optimized workshop environment: Pungent odors are significantly reduced during molding and pouring processes, improving working comfort for frontline workers. Formaldehyde emissions are halved, substantially easing environmental assessment pressure on enterprises;

• Dual benefits of cost reduction and efficiency improvement: A 10% lower furan resin feeding dosage still meets production strength requirements, drastically cutting procurement costs of auxiliary raw materials over long-term use. Faster curing shortens the production cycle per piece and raises production capacity;

• Upgraded finished casting quality: The low-sulfur molding sand system inhibits FeS formation and effectively suppresses hot cracking defects in steel castings, steadily lifting the yield rate of heavy-section thick castings, while pungent fumes generated during pouring are greatly reduced.

IV. Full Industrial Chain Support from Xinda Resin Empowers Green Transformation of Foundries

With years of deep cultivation in foundry materials, Xinda has built a complete product portfolio of over one hundred foundry materials including no-bake resins, cold-box resins, curing agents, coatings and smelting auxiliary materials, widely applicable to the production of steel and iron casting parts for automobiles, ships, wind power, construction machinery and precision instruments.

The launch of Xinda's low-VOC eco-friendly no-bake furan resin for steel castings fills the gap in high-performance domestic solutions for low-odor high-end steel casting binders. Xinda Resin provides one-on-one on-site process debugging, formula optimization and full-year on-site technical support for cooperating customers, alongside tiered preferential cooperation policies. It delivers one-stop green casting solutions for steel foundries covering four key dimensions: product performance, environmental compliance, production cost and casting quality.

Moving forward, Xinda Resin will continuously increase investment in R&D of eco-friendly new foundry materials. It will leverage low-VOC, low-pollution and high-performance products to assist the domestic foundry industry in phasing out high-pollution traditional binders, facilitate the industry’s upgrade to clean production, and uphold the development path of green manufacturing.