SONG CONG DIESEL ONE MEMBER COMPANY LIMITED

Common Defects in Green Sand Casting and How to Control Them to Reduce Scrap Rate

Common Defects in Green Sand Casting and How to Control Them to Reduce Scrap Rate Common defects in green sand casting and how DISOCO ensures quality control Green sand casting is a highly efficient and flexible method for producing mechanical components ranging from small to medium-sized parts. However, without proper control of critical factors such as sand moisture, molten metal temperature, and mold design, defects such as gas porosity, shrinkage, and dimensional deviations can easily occur, leading to increased scrap rates. At DISOCO, we operate a fully automated Japanese green sand casting line (SINTO), combined with SolidCast simulation software, strict quality control procedures, and systematic workforce training. This integrated approach enables us to minimize defects and maintain consistent product quality. Common Defects and DISOCO’s Control Measures • Gas Porosity Cause: Excessive sand moisture or poor gas permeability DISOCO’s control measures: Precise moisture control using SINTO sand analyzers Proper core processing to improve gas venting • Shrinkage Cause: Uneven solidification during cooling DISOCO’s control measures: Flow and solidification simulation using SolidCast software Optimized gating and riser system design • Dimensional Mismatch Cause: Mold misalignment or improper fixture setup DISOCO’s control measures: High-precision automatic green sand molding machines Standardized pattern design and mold assembly procedures • Poor Surface Finish / Burn-on Cause: Excessive pouring temperature or poor sand quality DISOCO’s control measures: Controlled pouring temperature via automated pouring systems Batch-by-batch metal composition analysis • Blow Holes Cause: Trapped air within the mold cavity DISOCO’s control measures: Optimized venting system design Standardized core design and manufacturing to ensure proper gas release Quality Control System at DISOCO Automated green sand molding machines (SINTO, Japan): 30 seconds per mold, casting weight up to 70 kg per part Dedicated sand management system: Continuous monitoring of sand compactability, moisture, and strength for each production shift SOLIDCast simulation software: Predicts potential defects before casting and optimizes gating and cooling system design Post-casting inspection: 3D CMM measurement, ultrasonic testing, magnetic particle inspection, hardness testing, and chemical composition analysis By operating a fully automated green sand casting system and enforcing strict process control, DISOCO not only reduces post-casting defects but also consistently delivers stable quality to customers in Japan, the United States, and FDI enterprises in Vietnam. For further details, please download our PDF or contact us directly if you are interested in green sand casting solutions in Vietnam.

DISOCO’s Green Sand Casting Capabilities

DISOCO’s Green Sand Casting Capabilities Green sand casting is a metal casting method that uses a mixture of sand, water, and bentonite clay to form molds. It is referred to as “green sand” because the mold retains a certain level of moisture throughout the molding process. When molten metal is poured into the mold, the green sand maintains its shape, producing castings with high strength and solid internal structure. This method is suitable for both small components and medium-to-large sized castings. Key characteristics of green sand casting: High flexibility for complex-shaped products Low mold cost Short preparation time Well suited for mass production Highly applicable to gray cast iron (FC) and ductile cast iron (FCD), two of the most common materials in industrial machinery Green sand casting is the most widely used casting technology globally in industries such as engines, automotive and motorcycle manufacturing, electrical equipment, and industrial machinery. Comparison of Casting Methods • Green Sand Casting Advantages: Low mold cost, high flexibility, easy mold forming, high-volume production, fast molding cycle Limitations: Moderate dimensional accuracy and surface finish Notes: Suitable for FC and FCD materials; common to moderately complex mechanical components • Investment Casting (Lost Wax) Advantages: Excellent surface finish; capable of producing highly intricate details Limitations: High cost; long mold preparation time Notes: Best suited for small parts requiring high precision and fine detail • Lost Foam Casting Advantages: Ability to cast complex shapes in a single pour; minimal or no parting lines Limitations: High foam material cost; specialized equipment required; limited mold size Notes: Suitable for pump housings, large casings, and specialized components • Die Casting Advantages: Highest dimensional accuracy; excellent surface quality; extremely high casting speed Limitations: Applicable only to aluminum and zinc alloys; very high mold cost Notes: Ideal for aluminum components in automotive and electrical equipment For medium-to-large sized castings with complex structures, made of FC/FCD materials, requiring cost efficiency and high-volume production, green sand casting remains the optimal solution. DISOCO’s Green Sand Casting Capabilities DISOCO is one of the very few companies in Vietnam operating a fully automated green sand casting line that meets Japanese industrial standards. This enables high-volume production with consistent quality and competitive costs. Technical specifications of the green sand casting line: Automated green sand casting line: SINTO (Japan) Annual capacity: 14,000 tons Molding cycle time: 30 seconds per mold Mold size: 700 × 600 × 500 mm Casting weight range: 1–70 kg Materials: Gray cast iron (FC), ductile cast iron (FCD) Fully automated processes: sand mixing, mold forming, molten metal pouring, and shakeout Quality control systems include: Spectrometer for chemical composition analysis 3D CMM for dimensional inspection Ultrasonic testing (UT) Hardness and tensile testing Sinto Sand Analyzer for sand quality control With advanced Japanese automation, annual production capacity of up to 15,000 tons, and extensive experience in FC/FCD materials, DISOCO is a reliable partner for customers seeking: Stable and consistent green sand casting quality Competitive pricing Mass production capability Strict quality control with modern inspection equipment If you require technical consultation or a detailed quotation for green sand casting projects, DISOCO is ready to support you from initial concept through to finished products.

Electric Vehicle Trends and Their Impact on the Cast Iron Industry: Challenges and Strategic Transformation

The rapid development of electric vehicles (EVs) is driving structural changes across the global automotive industry, resulting in significant impacts on the automotive components supply chain, including the cast iron industry. As internal combustion engines are gradually phased out, the role of cast iron in the production of passenger cars and light commercial vehicles is entering a period of contraction and marked segmentation. How do electric vehicles affect the cast iron industry? In traditional gasoline and diesel vehicles, cast iron—particularly green sand casting—has played a critical role in manufacturing key components such as engine blocks, cylinder heads, transmission housings, and pump bodies. These high-volume components have long provided stable revenue streams for cast iron foundries. However, with the transition to electric vehicles, internal combustion engines are no longer required, leading to a sharp decline in demand for conventional cast iron components. EVs prioritize lightweight materials such as aluminum and adopt technologies like high-pressure die casting. In addition, the number of components in EVs is reduced and vehicle architectures are fundamentally different, resulting in a lower share of cast iron within the passenger vehicle automotive value chain. This does not mean that the cast iron industry will disappear, but rather that its role in the passenger car and light commercial vehicle sectors is no longer as central as it once was. Opportunities remain despite EV-driven disruption Despite the impact of the EV trend, the cast iron industry—especially green sand casting—continues to present viable opportunities, provided companies target the appropriate market segments. In the medium to long term, demand for cast iron components is expected to remain stable in several key areas, including: Trucks, special-purpose vehicles, and construction machinery, where EVs still face limitations in fully replacing conventional powertrain systems Industrial machinery, agricultural equipment, and the energy sector, where cast iron remains widely used due to its durability, load-bearing capacity, and cost-effectiveness Industrial infrastructure and equipment, such as valve bodies, pump housings, and structural components requiring high vibration damping and mechanical strength DISOCO’s strategic response Amid the ongoing transition within the cast iron industry, DISOCO has proactively developed a long-term strategy focused on enhancing production capabilities and expanding into diversified market segments. With a solid technical foundation and flexible production management, DISOCO is well positioned to meet the increasingly diverse requirements of industrial customers, particularly in machinery, industrial equipment, and infrastructure-related fields. Companies seeking a reliable and experienced green sand casting partner are invited to contact DISOCO for detailed discussions regarding their production needs.

When should you choose hot forging instead of casting?

Hot forging is the optimal processing method for mechanical parts that require superior strength and precision. Here, we’ll clearly explain the differences between casting and hot forging. ■ Overview Casting is suitable for complex shapes and mass production, while hot forging is ideal for parts that demand high mechanical strength, load-bearing capacity, and dimensional accuracy. At DISOCO, we offer hot forging services with an annual capacity of up to 11,700 tons, using forging equipment ranging from 400T to 1600T, serving customers such as Honda, Piaggio, and many FDI partners. ■ When to choose forging instead of casting? -For components requiring high strength, load-bearing, or fatigue resistance: such as crankshafts, connecting rods, and drive shafts. Forging increases metal density and reduces internal defects. -For safety-critical or high-speed rotating components: such as parts in the drive system, brake, and steering mechanisms. -When high precision and dimensional stability are required: Closed-die hot forging ensures precise shaping from the billet, minimizing dimensional variations between parts. This is particularly effective for rotating components such as shafts and gears, where concentricity and straightness tolerances are critical. ■ Practical applications of hot forging technology at DISOCO -Motorcycle crankshafts: producing millions of parts annually, with technology transferred from Gohsyu Group (Japan). -Drive gears (Z49), A-arms, tie rods: using materials such as SCM, S45C, S35C. -Connecting rods and couplings: using 1000T–1600T presses for materials like S20CR, S48C. Hot forging not only improves product quality but also reduces risks during use. DISOCO provides high-precision, high-volume hot forging solutions for both domestic and international clients. At DISOCO, we use 1000-1600-ton presses combined with induction heating systems and automatic inspection equipment, enabling continuous production of millions of components with a consistent repeatability tolerance of ±0.05 mm. This process meets the stringent quality requirements of OEMs such as Honda, Piaggio, and Schaeffler. ■ For more details, please download the PDF or contact us directly.

Engine Cover Manufacturing by Sand Casting

Under an ISO-certified quality management system, DISOCO provides engine cover manufacturing and precision machining using sand casting technology, supplying Japanese-quality products to the automotive, motorcycle, and industrial machinery sectors. Overview DISOCO (Song Cong Diesel Co., Ltd.), located in northern Vietnam, is a metal processing manufacturer specializing in sand casting production technology. One of its core products, the engine cover, can be handled through an integrated process from design, casting, machining, to inspection. Through years of technical collaboration with Japanese companies, DISOCO delivers products with excellent durability, dimensional accuracy, and surface quality. Features - Diverse Product Range: Capable of producing engine covers, engine blocks, motor bodies, electrical box covers, and more. - Quality Assurance: Certified with ISO9001, ISO14001, ISO50001, and IATF16949. - High-Precision Machining: Finishing at micron-level accuracy using CNC lathes and machining centers. - Material Support: Cast iron materials such as FC200, FCD450. - Casting Capacity: Products up to 100kg, with an annual production capacity of up to 15,000 tons. Specifications - Casting Method: Sand casting (fully integrated automated sand casting line, from mixing and mold formation to pouring and mold destruction). - Casting Capacity: Approximately 15,000 tons annually, supporting products up to 100kg. - Machinery: CNC vertical lathes, horizontal machining centers, grinding machines, etc. - Dimensional Accuracy: In compliance with JIS standards, tolerances around ±0.05mm (depending on product shape). - Surface Roughness: Ra 3.2–6.3 μm (after finishing). Applications - Engine covers for automobiles - Engine covers for motorcycles - Motor covers for industrial machinery - Generator covers and electrical box housings DISOCO’s sand casting technology enables the production of engine covers that combine durability and precision, supplying highly reliable products to a wide range of industries. For more details, please download the PDF or feel free to contact us.

Motorcycle Bracket Manufacturing by Hot Forging

Overview DISOCO (Song Cong Diesel Co., Ltd.), a metalworking manufacturer based in Northern Vietnam, has extensive experience in the field of hot forging. Motorcycle brackets, in particular, are critical components that require durability, rigidity, and dimensional accuracy. DISOCO ensures stable supply of high-quality products by managing the entire process in-house, from material selection to forging, machining, and inspection. Features - High Strength: Hot forging refines the metal structure, providing excellent fatigue resistance and impact resistance. - High-Precision Machining: After forging, precise finishing is possible using CNC lathes and machining centers. - Diverse Product Range: Capable of producing motorcycle brackets, crankshafts, camshafts, pipe fittings, and more. - Mass Production Capability: Annual capacity of several million parts. - Quality Assurance: Quality management system certified under ISO9001, ISO14001, ISO50001, and IATF16949. Specifications - Forging Method: Hot forging (hydraulic press 160T–1600T, hammer 63kJ–80kJ) - Hot Forging Equipment: Hydraulic forging hammers (63kJ, 80kJ), forging presses (1000T, 1600T) - Product Weight: 1kg-20kg per piece - Materials: S20C, S35C, SCM420H, S48C, etc. - Processing Steps: Shearing → Heating (induction heating) → Press forming → Quenching & tempering → Shot blasting → Magnetic particle inspection Applications - Upper and lower motorcycle brackets - Crankshafts - Camshafts - Pipe fittings - Forged parts for industrial machinery and automobiles in general DISOCO’s hot forging technology is applied to motorcycle brackets and a wide variety of other components, delivering products that excel in strength, precision, and reliability. For more details, please download the PDF or feel free to contact us.

Integrated In-House Production System Enables Mass Production of Hot Forged Components

DISOCO (Song Cong Diesel Limited Company), based in Thai Nguyen Province in northern Vietnam, is a comprehensive manufacturer specializing in hot forging. With decades of collaboration with Japanese companies, DISOCO has earned a strong reputation for delivering consistent quality, reliable lead times, and competitive pricing, especially for forged components in the automotive, motorcycle, and industrial machinery sectors. ■ Mass Production Capacity – Over 10,000 Tons Annually DISOCO operates two dedicated hot forging plants within its premises, boasting a total production capacity exceeding 11,700 tons per year for forged parts ranging from 1kg to 20kg. Utilizing induction heating systems for precise temperature control, the company achieves high-precision forging that enhances the inherent properties of steel. This ensures stable, high-volume production of critical components such as engine parts and chassis structures, where safety and durability are paramount. - Key Equipment: Hydraulic forging hammers (63kJ, 80kJ), hot forging presses (1,000T, 1,600T) - Technical Partnership: Long-standing collaboration with Japan’s Gosho Co., Ltd., including crankshaft production for Honda ■ Flexible Material Capabilities – Optimized Forging Conditions by Material DISOCO supports a broad range of steel materials, tailoring forging conditions for each type to meet specific application requirements: - Carbon steels (S20C, S35C, S45C): Under brackets, swing arms - Chromium molybdenum steels (SCM420H, SCM440): Gears, towing hooks - Alloy steel (35XM): Crankshafts (~10kg) - Stainless steel (SUS316): Fittings (~0.18kg) Every forging process is optimized for heating temperature, holding time, and die structure, ensuring dimensional accuracy and repeatability. ■ Proven Quality and Customer Trust - Testing & Processing: Magnetic particle inspection, heat treatment (quenching/tempering), hardness testing - Certifications: IATF 16949 and ISO 9001 - Client Portfolio: Supplying to major global OEMs such as Piaggio, Schaeffler, and Honda, with millions of units shipped annually ■ Why Choose DISOCO for Hot Forging? Precision Thermal Control: Minimizes material variation with optimized heat profiles per alloy - In-House Die Design: Custom tooling for complex geometries and high-strength parts - Full In-House Production: From raw material sourcing to forging, machining, inspection, and delivery - High Accuracy & Fast Turnaround: Robust production management ensures tight tolerances even at mass-production volumes With a fully integrated production system based in northern Vietnam, DISOCO produces over 11,700 tons of hot-forged parts annually for the automotive and industrial sectors. By accommodating a wide range of materials—carbon, alloy, and stainless steels—and maintaining strict quality controls, DISOCO delivers precision-engineered components to meet exacting client specifications. Certified to IATF 16949 and ISO 9001, we are your trusted partner for reliable and high-performance forging solutions. Looking for hot forging solutions in Vietnam? Please feel free to contact me if you need any further assistance.

Precision Stainless Steel Fittings Manufacturing – Scalable Hot Forging for Mass Production

DISOCO (Song Cong Diesel Limited Company) specializes in hot forging of stainless steel fittings such as SUS316, providing a stable supply of high-strength pipe components for industrial use. Since its establishment in 1980, the company has accumulated extensive expertise in metalworking and has built a fully integrated production system encompassing design, forging, machining, and quality inspection. With flexible capacity from small-batch to high-volume production, DISOCO supplies precision fittings to a wide range of industries including automotive and industrial machinery. [Key Features of DISOCO’s Hot Forging Technology] - High-Strength Forging Process: Enhances material toughness and pressure resistance through hot forging techniques. - Material Versatility: Proven track record in forging various materials from carbon steels (S45C, S20CR, SCM420H) to stainless steels like SUS316. - Flexible Fitting Shapes: Capable of forming complex shapes such as elbows, T, and crosses with high dimensional accuracy. - Fully In-House Production: Die design, forging, machining, heat treatment, and inspection are completed internally. - Short Lead Times: With an annual forging capacity of 11,700 tons, DISOCO ensures stable supply for both small and large production volumes. [Production Capabilities] - Hot Forging Plant: - Hydraulic Forging Hammers: 63kJ, 80kJ - Forging Presses: 1,000 tons, 1,600 tons - Annual Capacity: 4,500 tons - Product Weight Range: 1kg to 20kg - Hot Forging Plant 2: - Technology transferred from Japan’s Gosho Co., Ltd. in 2006 (Crankshaft Forging) - Annual Capacity: 7,200 tons - Total Output to Date: Approx. 80 million crankshafts [In-House Quality Inspection]: - Magnetic Particle Testing (MT) - Hardness Testing - Tensile Testing - 3D Coordinate Measuring Machines (CMM) [Main Forged Products] - Crankshafts, fittings, gears, brackets - Materials: S45C, S20CR, S35C, SCM420H, SUS316 At DISOCO, stainless steel fittings including SUS316 components are produced through an integrated in-house hot forging process, from design to final inspection. Equipped with specialized machinery such as hydraulic forging hammers (63kJ, 80kJ) and heavy-duty presses (1,000T, 1,600T), the company handles a broad weight range from 1kg to 20kg. Comprehensive testing systems, including magnetic particle inspection, tensile testing, and precision 3D measurement, ensure both dimensional accuracy and reliable quality. If you're seeking a high-precision, high-strength solution for stainless steel fitting manufacturing, please contact DISOCO—your trusted partner for scalable hot forging in Vietnam.

Fully Integrated Production from Sand Casting to Machining – Scalable Mass Production of FC/FCD Components

DISOCO (Song Cong Diesel Limited Company) is a comprehensive casting manufacturer based in Thai Nguyen Province, Vietnam. Our core technology is green sand casting using FC (gray cast iron) and FCD (ductile cast iron), powered by fully automated Japanese-made molding lines. By operating a fully integrated in-house production system from casting to secondary machining, heat treatment, and inspection, we achieve shorter lead times, cost optimization, and stable quality, meeting the high standards of global industries. ■ High-Efficiency Automated Casting System – Up to 70kg Components Our fully automated green sand casting system utilizes molding and pouring equipment from SINTO (Japan), enabling stable and precise production at a rate of 30 seconds per mold. - Flask size: 700 × 600 × 500mm - Product weight range: 1kg to 70kg Thanks to consistent process control, DISOCO can mass-produce high-precision FC/FCD cast components, while effectively minimizing casting defects such as porosity and shrinkage. ■ Why choose DISOCO? – Unique Strengths in Sand Casting ① Stable Production & High Reproducibility with Japanese Equipment Our fully automated sand casting line from SINTO (Japan) automates every key process from sand mixing, mold forming to pouring and mold knockout. We ensure dimensional stability and shape consistency even during mass production. ② Versatility in Materials, Shapes, and Weights We support a wide range of cast iron grades, including FC150 to FC300 and FCD450/500. Our system flexibly handles small to large parts (1kg to 70kg) on the same line, with a strong track record in complex components such as cases and housings. ③ In-House Post-Processing Tailored for Casting All post-casting processes, including machining, heat treatment, coating, and inspection are performed in-house. We provide optimized secondary processing with distortion correction and precision machining based on the raw casting condition. By eliminating outsourcing, we achieve both faster lead times and more consistent quality. ④ Dedicated Quality Assurance System for Sand Casting Equipped with specialized inspection tools: - Chemical analysis (ARL3460) - Hardness testing - Ultrasonic flaw detection - Dimensional inspection using Mitutoyo 3D CMM - Certified under IATF 16949 and ISO 9001, our system meets the strict quality standards of the automotive industry. ■ Application Examples - Motor Housing (FC200, 63kg): Supplied to FDI clients - Exhaust Manifold (FC150, 7.2kg): Exported to the U.S - Electric Motor Case (FCD450, 9.8kg): JIS-compliant, supplied to an FDI client ■ Key Benefits - Fully in-house production from sand casting to secondary processing → Enables easy lead time control - Japanese equipment + IATF 16949 certification → Clear and reliable quality management system DISOCO specializes in mass production of FC (gray iron) and FCD (ductile iron) components through automated green sand casting lines from Japan. Our fully integrated in-house production, from casting and machining to heat treatment and inspection, enables us to deliver shorter lead times, optimized costs, and stable quality. With certifications under IATF 16949 and ISO 9001, we offer dependable quality assurance for industries with strict production standards. If you're seeking a reliable sand casting partner in Vietnam, DISOCO is ready to deliver precision, quality, and consistency you can trust.

Stable Quality in Sand Casting | Mass Production with Advanced Chemical & Quality Inspection Systems

DISOCO (Song Cong Diesel Limited Company), based in Thai Nguyen Province, Vietnam, specializes in mass production of cast iron components using sand casting technology. We are highly trusted by Japanese and Western clients in the automotive, motorcycle, and industrial machinery sectors, thanks to our robust quality control system and in-house chemical analysis capabilities. ■ End-to-End Quality Assurance – From Pre-Casting to Final Inspection We implement a three-stage quality control system to minimize defects such as burrs and casting flaws, meeting strict client specifications: Pre-Casting Analysis & Sand Verification - Chemical composition analysis using SPECTROMAXX - Sand property testing (strength and moisture content) via SINTO sand testing equipment In-Process Monitoring - Mold cycle time: 30 seconds using SINTO’s automated molding line - Molten metal flow and furnace temperature are tightly controlled to ensure casting consistency Post-Casting Inspection - Dimensional inspection via Mitutoyo 3D CMM - Non-destructive testing: Magnetic particle & ultrasonic testing (Sonatest) - Mechanical testing: Hardness, tensile strength, and surface roughness ■ Equipment & Testing Facilities (Visualized Quality Control) Located in a 60,000m² factory, DISOCO is equipped with a wide array of testing devices: - SPECTROMAXX: Chemical composition analysis - SINTO sand tester: Physical property analysis of molding sand - Mitutoyo 3D CMM: Dimensional inspection - Sonatest: Ultrasonic flaw detection - Hardness tester, tensile tester, surface roughness tester - ARL3460 spectrometer - Digital microscope - Magnetic particle inspection system All testing is conducted in compliance with international standards: ISO 9001, IATF 16949, ISO 14001, and ISO 45001. ■ Proven Trust from Japanese and Global Clients DISOCO currently supplies over 10,000 tons/year of sand cast iron components to global clients including major names from Japan and the U.S. (e.g., Dorman, EQI). Our strength lies in our data-driven quality control and reliable chemical analysis, which have earned long-term trust. Representative Product: Engine block (FC200, 5kg) ■ Why Clients Choose DISOCO - Optimized quality control for sand casting: From material analysis to final inspection - Over 1,000 tons/month capacity: Flexible support for mass production - Strategic location in Northern Vietnam: Enables short lead time shipping to Japan and across Asia - OEM-grade process control: Built to meet both Japanese and global manufacturing standards With its robust in-house quality assurance system—including chemical analysis, sand testing, and non-destructive inspection, DISOCO is fully equipped to provide mass production of sand cast iron parts that meet international standards. Exploring reliable sand casting solutions in Vietnam? Partner with DISOCO for quality, consistency, and trusted performance.

High-Quality Hot Forging for Diverse Materials

At DISOCO, we utilize advanced hot forging technology to deliver high-quality forged products with consistent reliability. By leveraging state-of-the-art hydraulic forging hammers and forging presses, we support a wide range of materials including SUS316, SCM420H, S45C, S48C, 35XM, and S20CR. Our capabilities cover product sizes from 0.5 kg to 25 kg, providing tailored solutions to meet your exact requirements. We have also established an integrated production system, handling everything from forging to machining and heat treatment in-house. Under strict quality control in accordance with ISO 9001 and IATF 16949, we guarantee product quality and meet the demands of global customers—especially Japanese companies. Our production base is located in Vietnam. Key Features of DISOCO’s Hot Forging ✔ Precision Forging with Advanced Equipment Utilizing hydraulic forging hammers and forging presses, we achieve precise and uniform finishes, ensuring stable delivery of high-quality products. ✔Integrated Production Capability From forging to machining and heat treatment, we provide total solutions and fast delivery while maintaining consistent quality. ✔Wide Product Range We accommodate a broad weight range from 0.5 kg to 25 kg, flexibly meeting various customer demands. ✔Support for Diverse Materials We forge using a wide variety of materials suited to specific applications, including: Stainless Steel (SUS316), Chromium-Molybdenum Alloy Steel (SCM420H), Medium Carbon Steel (S45C, S48C), Nickel-Chromium-Molybdenum Steel (35XM), Chromium Steel (S20CR) ✔In-House Die Design Our forging dies for hot forging are designed in-house. While some die manufacturing is outsourced, this ensures an efficient and stable production system. ✔Skilled Engineering Team Of our 850 employees, more than 160 are engineers, ensuring optimal development and production processes. ✔Strict Quality Control We comply with ISO 9001 and IATF 16949 to guarantee high-quality products. ✔Proven Track Record with Japanese Clients Around 70% of our clients are Japanese companies, and we meet their stringent quality requirements. We supply hot-forged products to Japan’s Goshu Group, with over 80 million units shipped to date. Quality Assurance & Production System We have established a robust hot forging production system with strict quality control and stable supply across diverse materials. ✔Quality Control System Certified under ISO 9001 and IATF 16949, ensuring compliance with international standards. Perform magnetic particle inspection, dimensional measurement, and mechanical property testing to guarantee consistent quality and strength. ✔Advanced equipment Forging Presses: 1000T, 1600T Hydraulic Forging Hammers: 63kJ, 80kJ Supporting systems: Forging furnaces, quenching/tempering ovens, shot blasting, and NDT equipment. ✔Efficient delivery Annual production capacity: 4,500 tons with flexible scheduling for urgent orders. At DISOCO, our hot forging technology enables us to stably supply high-quality products across a wide range of materials. Equipped with hydraulic hammers, forging presses, and inspection tools, we ensure consistent forging precision. With an annual capacity of 4,500 tons, we flexibly accommodate short lead times. We have delivered over 80 million high-quality products to various companies, including Japan’s Goshu Group. We will continue to contribute to more industries by leveraging cutting-edge hot forging technology. For hot forging in Vietnam, contact DISOCO!

Complex Shapes Casting - Lost Foam Casting for FC/FCD Materials

We specialize in lost foam casting to manufacture complex-shaped components made from gray cast iron (FC) and ductile cast iron (FCD) with high precision and consistent quality. Some parts achieve such accuracy that secondary machining becomes unnecessary, significantly improving productivity and reducing costs. Lost foam casting is a technique that uses foam patterns to accurately cast even the most intricate shapes. By utilizing equipment from Taiyo Machinery and foam patterns from Taniguchi Chemical Industry, we achieve high-quality casting for both gray and ductile iron. With its smooth surface finish, lost foam casting minimizes the need for secondary processing, contributing to cost savings. Features of Disoco’s Lost Foam Casting ✔Casting of Complex Shapes Utilizing Taiyo Machinery’s equipment and Taniguchi Chemical Industry’s foam patterns, we achieve precise and stable casting of complex components. ✔Minimal or No Secondary Processing Lost foam casting delivers a smooth surface finish and precision that often eliminates the need for secondary machining on certain components. ✔Compatible with Various Materials In addition to gray cast iron (FC) and ductile cast iron (FCD), we support a wide range of materials depending on design requirements. ✔Stable Production System Backed by over 160 skilled engineers, we support stable and efficient production using the latest technology. ✔Strong Track Record with Japanese Clients 70% of our sales are to Japanese companies. We have established a system capable of meeting the high-quality standards demanded by the Japanese market. ✔Integrated Production Line From casting to machining and surface treatment, we provide a stable supply of high-precision cast products through a seamless production process. Specifications of Lost Foam Casting Products - Supported Materials: Gray Cast Iron (FC), Ductile Cast Iron (FCD) - Part Sizes: From small and medium to large components - Production Capacity: Approx. 2,800 tons/year - Foam Pattern Source: Made in Japan - Molding & Sand Feeding System: Made in Japan, sand flow rate: 80 m³/cycle - Mold Size: Up to 1000 × 1000 × 1000 mm Quality Assurance & Production System ✔ Rigorous Quality Control Our lost foam casting line uses advanced measuring equipment such as spectrometers to ensure precise control of FC and FCD materials. We comply with ISO 9001 and IATF 16949, enabling us to meet the demands of industries requiring strict quality—such as automotive. ✔High-Precision Casting of Complex Components By combining Taniguchi Chemical Industry’s foam pattern technology with lost foam casting, we achieve precise casting of intricate parts. Over 160 skilled engineers support this process with the latest technology to ensure stable production. ✔Short Lead Times and Flexible Production The high efficiency of our lost foam casting process enables quick delivery. From mass production to small-lot prototyping of FC and FCD products, we offer flexible production tailored to customer needs. Our lost foam casting technology enables the high-precision production of complex parts using gray cast iron (FC) and ductile cast iron (FCD). With advanced equipment and a team of experienced engineers, we deliver both short lead times and flexible production, meeting the diverse demands of customers—especially Japanese clients. We will continue to refine our lost foam casting technology to offer high-quality, cost-competitive solutions using FC and FCD materials. For lost foam casting in Vietnam, contact DISOCO!

Sand Casting – Gray Cast Iron & Ductile Cast Iron

Our company specializes in sand casting, producing high-quality gray iron (FC) and ductile iron (FCD) products. By fully automating the green sand casting process, we ensure stable supply, high productivity, and superior casting quality. Utilizing Sinto's FCMX series (Japan), we automate every step—from sand mixing and mold formation to pouring and shakeout—enhancing precision while optimizing production costs. Our castings achieve high dimensional accuracy and excellent surface finish, making them ideal for applications demanding wear resistance and strength, such as automotive and industrial machinery components. By maximizing the advantages of green sand casting, we optimize quality, cost, and efficiency in manufacturing gray iron (FC) and ductile iron (FCD) products. Our company ensures a stable supply of sand cast products manufactured in Vietnam. DISOCO’s Green Sand Casting Advantages ✔ Full Automation: From sand mixing and mold making to automatic pouring and mold breakdown, the green sand casting process using FC and FCD materials is fully automated, optimizing quality, cost, and productivity. ✔ Cost Competitiveness: With an annual production capacity of 15,000 tons and a casting cycle of one mold every 30 seconds, we optimize production costs and offer products at competitive prices. ✔ Advanced Equipment: A fully integrated production system incorporating the FCMX series from Japan’s Sintokogio, Ltd. enhances productivity and enables the production of high-quality parts using FC and FCD materials. ✔ In-House Mold Design: We design casting molds internally to ensure high precision and stable product supply. ✔ End-to-End Production: We handle all steps in-house—from casting to machining, heat treatment, and assembly. ✔ Skilled Workforce: Of our 850 employees, over 160 engineers are assigned to optimal departments and continuously improve their skills through guidance from foreign-affiliated companies. ✔ Japanese-Quality Standards: Approximately 70% of our major clients are Japanese companies, and we consistently meet their high quality standards. ✔ Quality Certifications: Strict quality control is implemented for FC and FCD products in accordance with international standards such as ISO 9001 and IATF 16949. Technical Specifications Materials: Gray iron (FC), Ductile iron (FCD) Production Lines: 2 (fully/semi-automated) + 4 melting furnaces across 2 factories Annual Capacity: ~15,000 tons Pouring Speed: ~30 seconds/mold Max Mold Size: 900×600×250mm Product Weight: 1–100kg Order Flexibility: Small to large batches Quality Standards: ISO 9001, IATF 16949, ISO 50001, ISO 14001 Applications Our FC/FCD sand castings are used in: Automotive: Motor casings, exhaust pipes (FC) Textile/Light Industrial Machinery: Sewing machine bodies Agricultural Machinery Quality Assurance & Production ✔ Robust Quality Control: ISO 9001, IATF 16949 compliance with strict inspections. ✔ State-of-the-Art Casting Systems: Japanese-made equipment for high-precision sand molds. ✔ Expert Engineers: 160+ engineers deployed for optimal technical support. DISOCO’s green sand casting technology automates every step from sand mixing to pouring and mold breakdown, enabling the high-quality and cost-effective production of gray cast iron (FC) and ductile cast iron (FCD) products with stable supply and high productivity. With advanced equipment, we enhance casting precision and offer highly wear-resistant, high-strength products for the automotive, industrial, and agricultural machinery sectors. Under a strict quality management system, we deliver durable, high-performance castings reliably. DISOCO will continue to innovate in green sand casting technology, offering high-quality casting solutions using FC and FCD materials to meet growing market demands.