KOBAYASHI CASTING Co.,Ltd

When Should You Choose Lost Wax Casting Instead of Machining or Welded Assembly for Stainless Steel Parts?

For stainless steel components that require complex shapes, high dimensional accuracy, and material integrity, lost wax casting is the optimal solution. Compared to machining or welded structures, it offers an excellent balance between cost and quality. Overview When manufacturing industrial stainless steel parts, designers and production engineers often compare three main methods: lost wax casting (investment casting), machining, and welded assembly. Each method has its advantages, but lost wax casting stands out for its ability to create seamless, high-precision parts while optimizing costs for medium- and large-volume production. Particularly for complex stainless steel components requiring tight tolerances and material consistency, lost wax casting is a reliable and efficient technical solution. When to Choose Lost Wax Casting - When complex shapes or hollow structures are required Even shapes that are impossible or extremely costly to produce through machining can be accurately molded as a single piece using wax models. - When high material uniformity and mechanical strength are required Lost wax casting allows seamless, monolithic forming, eliminating stress concentration and leakage risks associated with welding, and improving overall structural reliability. - When reducing costs for medium- to large-volume production Lost wax casting spreads the cost of mold fabrication across multiple parts, making it significantly more cost-effective than machining or welding individual components. This is especially advantageous for projects requiring hundreds to thousands of identical pieces. - When tight tolerances and fine surface finishes are required Casting can achieve a dimensional tolerance of ±0.2 mm, and at Kobayashi Casting, finishing processes can further refine accuracy to ±0.01 mm. The cast surface is smoother than sand casting, reducing polishing and grinding operations. Typical Applications of Lost Wax Casting - Stainless steel fittings and pump parts with thin-walled or hollow structures - Precision fluid components for medical and semiconductor applications requiring zero leakage - Components for food and chemical equipment requiring corrosion and chemical resistance - High-quality export products with full traceability and strict quality control Lost wax casting is an excellent technology for mass-producing complex stainless steel parts with high quality, high precision, and low cost. By forming components as a single cast structure, it overcomes many of the limitations of machining and welding, ensuring both functionality and reliability. At Kobayashi Casting, we leverage Japanese technology to deliver high-precision lost wax casting from our Vietnam factory. We achieve finishing accuracies of ±0.01 mm and handle a wide range of stainless steel grades including SCS13, SCS14, CF8, CF8M, CF3, CF3M, and 17-4PH. Our fully integrated production covers casting, machining, 3D measurement, and material analysis. For more details, please download the PDF or contact us directly.

Lost Wax Casting by Kobayashi Casting - Achieving Japanese Quality in Vietnam

At Kobayashi Casting, we utilize the lost wax casting method, ideal for manufacturing complex-shaped components, to deliver stainless steel cast parts with exceptional precision and stable quality. Overview Lost wax casting is a casting method particularly effective for producing complex metal components with high accuracy, especially when using stainless steel. Kobayashi Casting is a 100% Japanese-owned company operating in Vietnam, specializing in stainless steel casting using the lost wax method. A fully in-house production system—from mold design, casting, and machining to quality inspection—ensures technical stability and reliable delivery times. Features - High-precision casting of complex and thin-walled components - High dimensional accuracy with tolerances of up to ±0.01 mm - Smooth surface finish that minimizes post-processing machining - Compatible with a wide range of corrosion-resistant materials such as SUS304 (SCS13), SUS316 (SCS14), and CF3M - Over 90% of products are exported to Japan, the U.S., Europe, and Asian markets Manufacturing Process - Mold design and fabrication (using CAD/3D) - Wax model formation - Formation of ceramic shell (multi-layer coating) - Dewaxing to create internal cavities - High-temperature shell firing (around 1000 °C) - Stainless steel melting and pouring - Shell removal and finishing - Dimensional, material, hardness, and composition inspections (using 3D measuring machines and composition analyzers) Applications - Piping components and fittings for food, beverage, and pharmaceutical machinery - Internal components for valves, pumps, and fluid control equipment - Small, complex parts for medical and analytical devices - Corrosion-resistant components for semiconductor manufacturing equipment and chemical plants At Kobayashi Casting, we ensure a stable supply of complex-shaped components through high-precision lost wax casting that meets Japanese standards. Our fully in-house system, including wax model production, enables short lead times, high quality, and cost efficiency. For more details, please download the PDF or contact us directly.

Countermeasures for Surface Roughness Defects in Lost-Wax Casting

What Causes “Rough Surface” Defects? In lost-wax casting, “rough surface” defects can significantly impact both the appearance and functionality of products. Main causes include: - Roughness or air bubble contamination on the wax pattern surface - Uneven particle size of investment slurry - Foreign matter or bubbles adhering to the mold surface - Rapid temperature changes during dewaxing or firing - Oxides or inclusions in the molten metal KOBAYASHI CASTING’s Countermeasures and Post-Processing Solutions At KOBAYASHI CASTING, we implement the following countermeasures to address rough surface defects in lost-wax casting: - Optimizing wax injection machine temperature, pressure, and cooling control to form smooth-surfaced wax patterns - Using high-quality ceramic materials and stable slurry viscosity for uniform coating - Strictly managing temperature profiles with automatic dewaxing equipment (autoclaves) and electric furnaces - Preventing contamination from oxides, slag, ceramic fragments, and dust through stable melting with high-frequency and medium-frequency furnaces - In-house support for post-casting surface finishing, such as shot blasting and CNC machining Why Choose Us - Integrated support from precision lost-wax casting to post-processing - Strict process control to prevent surface defects before they occur - Compliance with global standards through ISO9001 and PED certification Integrated High-Quality Lost-Wax Casting and Post-Processing at Our Vietnam Factory KOBAYASHI CASTING provides integrated services from lost-wax casting to surface treatment and CNC post-processing. By preventing surface defects in advance, we ensure stable quality and support mass production of medical and industrial components. If your company is facing quality challenges in lost-wax casting, please consult our Vietnam facility.

Countermeasures Against Foreign Material Contamination in Lost-Wax Casting

Challenges and Causes of Contamination Foreign material contamination in lost-wax casting is a major cause of defects and issues in post-processing. It happens when unwanted particles or residue get trapped inside or on the surface of the cast part. Main causes include: - Impurities introduced during metal melting - Residual matter inside the mold - Incomplete removal of wax or investment material KOBAYASHI CASTING’s Countermeasures and Process Management KOBAYASHI CASTING addresses foreign matter inclusion through the following technologies and processes: - Complete removal of wax residues using automatic dewaxing equipment (autoclaves) - Stable melting with medium and high-frequency induction furnaces to suppress impurity formation - Thorough elimination of moisture and foreign matter residues via strict mold drying and heating management - Verification of material purity in every lot using metal composition analyzers - A quality management system compliant with ISO9001:2015 and PED certification Benefits: Improved Quality and Reliability These measures enable KOBAYASHI CASTING to provide high-quality lost-wax casting products trusted for medical, mechanical, and semiconductor applications. By reducing rework and scrap loss caused by contamination, and improving yield in downstream processes, we significantly cut quality-related costs for our clients. Why Choose Us - End-to-end system specializing in lost-wax casting - Analytical equipment and expertise ensuring material purity - Proven mass production capacity: 300 tons annually, with 90% for export KOBAYASHI CASTING takes contamination issues in lost-wax casting seriously, optimizing equipment, processes, and quality management in an integrated manner. Our Vietnam factory is equipped with the latest dewaxing systems and composition analyzers, and is certified under ISO9001 and PED. With stable quality, we have earned the trust of Japanese and Western clients alike. If your company faces contamination challenges in lost-wax casting, please consult with us.

Stainless Steel Lost-Wax Casting

Kobayashi Casting is a company specializing in precision lost wax casting using stainless steel, delivering high-quality, JIS-standard (JIS G 5121) compliant products from its factory in Vietnam to the global market. The company has extensive experience in casting complex, high-precision stainless steel components such as SCS13, SCS14, CF3M, 1.4581, and 17-4PH. We supply parts for industries, including medical equipment, semiconductor components, and water systems—sectors that require high corrosion and heat resistance. Kobayashi Casting consistently ensures stable, reliable quality that meets the demands of various industries. Key Features - Wide Industry Applications: Produces precision lost wax cast components for diverse industries, including medical devices, semiconductors, water systems, and industrial machinery. - Versatile Material Compatibility: In addition to stainless steel (SCS13, SCS14, CF3M, 1.4581, 17-4PH), we also offer lost wax casting for alloy steels. - Japanese-Standard Quality Management: Strict inspection in compliance with JIS G 5121 ensures casting precision and repeatability. - Comprehensive Quality Control: Full-process quality control, from raw material composition analysis to final product dimensional and hardness testing. - High-Precision Machining: Capable of secondary machining with a tolerance of ±0.01mm. - Experienced Technical Team: Skilled in providing solutions and precision machining for medical and high-accuracy components. - Export-Oriented Quality: 90% of our products are exported to the U.S., Germany, Japan, South Korea, Taiwan, and Singapore. Production Capabilities - Equipment: Lost wax casting machines: Wax injection machines (10 tons), runner injection molding machines (16 tons), mold drying chambers, electric furnaces, and both high- and medium-frequency melting furnaces. - Quality Control Tools: Metal composition analyzers, molten metal temperature measurement devices, component analyzers, 3D measuring equipment (CMMs), and image measurement tools. - Post-Casting Machining: CNC machining centers. Kobayashi Casting is continuously enhancing its capabilities in stainless steel lost wax casting—from material selection to casting, machining, and product finishing—all under Japanese quality standards. Leveraging our stable supply chain from Vietnam and flexible responsiveness, we continue to deliver valuable casting solutions across diverse industries.

Lost Wax Casting of Components for the Water & Gas Industry

Kobayashi Casting has extensive experience in lost wax casting of stainless steel components for the water and gas industries. With a fully integrated production system at our factory in Vietnam, we flexibly accommodate a wide range of customer production needs. By strictly adhering to the Japanese Industrial Standard (JIS G 5121), we not only ensure dimensional accuracy and corrosion resistance, but also meet rigorous requirements for pressure resistance, tight sealing, and durability in outdoor and corrosive environments. With an annual production capacity of 300 tons, we deliver cost-effective, high-quality solutions with short lead times. Key Features of Kobayashi Casting’s Lost Wax Casting Technology - Japanese-Standard Casting Technology Accuracy and quality are controlled under JIS standards, ensuring consistent quality. - Diverse Industry Applications From water and gas systems to medical devices, semiconductors, and mechanical components. - Strict Quality Management Material composition is verified using spectrometers, hardness testers, and 3D measuring machines. - Wide Material Compatibility Experienced in casting stainless steels such as SCS13, SCS14, CF3M, 1.4581, and 17-4PH. - Flexible Post-Casting Machining Secondary machining with tight tolerances of ±0.01mm, even for components with complex shapes. - Experienced Technical Team Our skilled engineers bring years of precision lost wax casting expertise to each project. - Proven Export Track Record Over 90% of our products are exported to markets such as the USA, Germany, Japan, and Asia. - Fully Integrated In-House Production From mold design, casting, machining to surface treatment, all processes are handled within our Vietnam facility. Product Specifications for Water & Gas Industry Castings - Maximum Size: Up to 300 mm - Maximum Weight: Up to 20 kg - Materials: Stainless steel types SCS13, 1.4581, 1.4409 - Minimum Order Quantity: 50 pieces or 50 kg and above Equipment Capabilities - Casting Equipment: 10-ton wax injection machines, drying furnaces, medium- and high-frequency melting furnaces - Inspection Equipment: Metal composition analyzers, hardness testers, 3D coordinate measuring machines (CMM) - Post-Casting Machining: CNC machining centers for precision processing - Quality Control System: Metal analyzers, molten metal temperature gauges, 3D and image-based measurement tools In the water and gas sector, requirements for pressure resistance, corrosion resistance, and long-term durability are extremely demanding. At Kobayashi Casting, we meet these expectations with a completely integrated production line—from mold design, casting, machining to final inspection—all performed at our Vietnam factory. Thanks to our JIS-compliant quality management system and stable annual production of 300 tons, we confidently deliver high-precision stainless steel castings across a wide range of industries, with short delivery times and exceptional quality. If you’re looking for a reliable partner in high-quality lost wax casting, Kobayashi Casting is your ideal solution.

Lost-Wax Casting for Semiconductor Components

Kobayashi Casting possesses the capability to produce precision metal components for the semiconductor industry using lost wax casting, especially for intricate parts such as nuts mounted on circuit boards. With a fully integrated production system at our Vietnam factory, we manage the entire process in-house - from mold design, wax injection, casting, machining, surface treatment, to quality inspection - ensuring short lead times and consistent quality. Advantages of Kobayashi Casting’s Lost Wax Technology - Versatile Industry Applications In addition to serving the semiconductor sector—where microstructure precision, material stability, and dimensional accuracy are critical—we also cast components for medical devices, water and gas systems, and various industrial machinery. - Japanese-Standard Precision All production processes are managed under JIS standards, ensuring stable dimensional accuracy and material consistency. - Fully Integrated Production Line End-to-end control from mold design, lost wax casting, precision machining, to surface finishing, all under one roof. - High-Precision Machining Capable of secondary machining tolerances up to ±0.01mm, suitable for intricate and critical parts. - Wide Range of Materials Expertise in casting various stainless steels such as SCS13, SCS14, CF3M, 1.4581, and 17-4PH. - Strict Quality Control Comprehensive or sampling-based inspection using metal analyzers, hardness testers, and 3D coordinate measuring machines (CMM). - Advanced Design Capability Mold design using 3D software such as Pro/E, AutoCAD, and SolidWorks for optimized precision and functionality. - Export Experience Over 90% of products are exported to the US, Germany, Japan, South Korea, Taiwan, and Singapore. Technical Specifications for Semiconductor Industry Castings - Size: Up to 300 mm - Weight: Up to 20 kg - Material: SCS13 stainless steel - Minimum Order Quantity: From 50 units or 50 kg and above Production Equipment Capabilities - Lost-Wax Equipment: 10-ton wax injection machines, kilns, drying ovens, medium- and high-frequency induction melting furnaces - Inspection Tools: Metal composition analyzers, molten metal temperature sensors, 3D measuring machines, and image-based inspection tools - Post-Casting Machining: CNC machining centers for high-precision finishing - Quality Management Tools: Advanced 3D coordinate measuring systems and image measurement equipment The semiconductor sector requires ultra-precise microstructures, material stability, and stringent production controls. Kobayashi Casting addresses these needs through a closed-loop lost wax casting process and Japanese-standard quality control system. Our Vietnam factory is equipped to flexibly support everything from prototyping to mass production, ensuring fast lead times and high repeatability in every batch. Kobayashi Casting is your trusted partner for delivering high-quality metal lost wax cast components to meet the exacting standards of the semiconductor industry. Contact us to discuss your precision component requirements!

Comprehensive Support from Lost Wax Casting to Post-Casting Machining

At KOBAYASHI, we operate a fully integrated production system, performing lost wax casting and post-casting machining in-house at our factory in Vietnam. By strictly adhering to the JIS (JIS G 5121) standards and leveraging extensive experience, we specialize in manufacturing precision components for high-requirement industries such as medical devices and industrial machinery. Integrated Production System at KOBAYASHI CASTING In-House Post-Casting Machining We not only specialize in lost wax casting but are also fully equipped for high-precision post-casting machining on-site. With machines such as vertical milling, horizontal milling, surface grinding, and CNC machining centers, we can meet tight tolerances up to ±0.01mm. Even thin-walled or complex-shaped parts can be handled flexibly and efficiently thanks to our integrated system, ensuring stable quality and prompt delivery. - Japanese-Standard Casting Technology Quality is managed rigorously in compliance with JIS G 5121, ensuring consistent and reliable results. - Experience Across Multiple Industries We have a strong track record of delivering precision components for various sectors, including medical devices, semiconductors, and industrial machinery. - Broad Material Compatibility Proficient in casting a wide range of materials such as SCS13, SCS14, CF3M, 1.4581, and 17-4PH. - Skilled Technicians A team of highly experienced technicians oversees the entire process—from casting to finishing—ensuring expert handling at every stage. - Global Export Focus We export more than 90% of our output to markets including the USA, Germany, Japan, South Korea, Taiwan, and Singapore, demonstrating strong international trust and capability. Quality Assurance and Production Control System We’ve established a strict quality control system, featuring: - Metal Composition Analyzers and Hardness Testers for full traceability from raw material to finished product. - 3D Coordinate Measuring Machine (CMM) to perform ultra-precise micrometer-level measurements and detect early-stage defects like gas porosity caused by sand contamination—imperfections invisible to the naked eye. KOBAYASHI CASTING offers a fully integrated solution—from lost wax casting to fine machining—capable of flexibly meeting complex geometry and high-precision requirements. Our JIS-compliant quality control, combined with advanced machining and inspection equipment, has earned us trust in high-stakes industries like medical and semiconductor. With our global production and quality assurance system—including our Vietnam factory—we deliver stable, high-reliability products worldwide.

Component Analysis and Quality Inspection in Lost Wax Casting

At KOBAYASHI CASTING, we implement a strict quality control system throughout the entire lost wax casting process to ensure consistent product quality. From the initial analysis of input metal composition to final inspection, every stage is closely monitored in accordance with the JIS G 5121 standard. From the stage of material selection for casting, we conduct chemical composition analysis to ensure compliance with technical requirements. After the wax pattern casting process, products undergo multiple inspections, including dimensional measurement, hardness testing, and surface quality evaluation. Through this rigorous quality management system, we confidently meet the stringent demands of industries such as medical devices, semiconductors, and industrial machinery. In-House Quality Control System To maintain stable quality for lost wax cast products, we are equipped with specialized inspection devices and conduct cross-checks at every production stage. Inspection Equipment and Methods: - Metal Composition Analyzer Accurately verifies the chemical composition of raw materials before casting. This ensures materials meet technical standards and strictly adhere to JIS, preventing defects from the outset. - Hardness Tester Evaluates the mechanical strength and durability of cast products. - 3D Coordinate Measuring Machine (CMM) Measures each component with micron-level precision, ensuring dimensional accuracy based on design drawings. Uses scanning analysis to identify potential defects (e.g., trapped sand, micro-cracks) that visual inspections might miss. Advantages of Lost Wax Casting at KOBAYASHI CASTING: - Comprehensive In-House Quality Management Fully equipped with metal analyzers, hardness testers, and 3D measuring machines to enforce strict quality inspections. - Japanese-Standard Casting Technology Precision casting management in accordance with JIS G 5121, ensuring stable and reliable quality. - Diverse Industry Applications Proven experience in manufacturing medical devices, semiconductors, water/gas and industrial machinery. - Skilled and Experienced Technicians Experts capable of managing complex, precision-demanding components. - High-Precision Post-Casting Machining ±0.01mm tolerance in secondary machining. - Material Versatility Proficient in casting materials such as SCS13, SCS14, CF3M, 1.4581, and 17-4PH to meet a wide range of specifications. - Global Export Capability 90% of products are exported to markets including the USA, Germany, Japan, South Korea, Taiwan, and Singapore. - Eng-to-end Production Integrated production from mold design, casting, machining to surface treatment—optimizing turnaround time and quality control. KOBAYASHI CASTING performs full-process quality control - from material analysis to final inspection - ensuring reliability and consistency. Our JIS-compliant system, supported by advanced testing equipment, allows us to meet even the most demanding high-precision and complex-shape requirements. Operating from our Vietnam factory, we maintain uniform quality standards for both domestic and global clients. This enables us to supply trusted products to critical industries like medical, semiconductors, and infrastructure. For lost-wax cast parts requiring ultra-high precision, our integrated quality management guarantees performance and durability. Contact us today to discuss your project needs!

Lost Wax Casting for Medical Device Components

At KOBAYASHI CASTING Vietnam, we specialize in lost wax casting (investment casting) technology that meets Japanese quality standards, serving the diverse needs of various industries—particularly the medical device industry. Key Features of Lost Wax Casting at KOBAYASHI CASTING: - Specialized in the Medical Field Extensive experience in producing precision-cast components for medical equipment that require high accuracy. - Japanese-Standard Casting Technology Manufactured under strict precision control compliant with JIS G 5121, ensuring consistent quality. - Wide Range of Applications We support lost-wax casting for medical device parts, semiconductor components, water/gas infrastructure parts, and industrial machinery components. - Rigorous Quality Control System Equipped with specialized tools such as metal composition analyzers, hardness testers, and leak testers, ensuring quality at every stage. - Experienced Technical Team Highly skilled engineers and technicians, professionally trained to handle products with demanding precision—especially medical components. - Wide Material Capabilities Proficient in casting various stainless steel grades including SCS13, SCS14, CF3M, 1.4581, and 17-4PH. - High-Precision Post-Casting Machining Capable of secondary machining with tolerances up to ±0.01mm, meeting complex machining requirements. - Export Expertise 90% of output is exported to markets such as the United States, Germany, Japan, South Korea, Taiwan, and Singapore. - Integrated Production System Fully integrated workflow: from mold design, wax pattern casting, machining, to surface treatment—optimizing product quality and delivery time. Technical Specifications - Materials: SCS13, SCS14, CF8, CF3M, 1.4581 – ideal for medical and precision industrial components. - Product Dimensions & Weight: - Max Diameter: 300 mm - Max Weight: 20 kg - Post-Casting Machining Accuracy: - Tolerance: ±0.01 mm - Annual Capacity: 300 tons - Key Equipment: - Wax injection machines (10 tons) - Runner injection molding machines (16 tons) - Wax mold drying chambers - Electric furnaces - High- and medium-frequency melting furnaces - Shot blasting machines Quality Assurance & Production System Quality Control: - Metal composition analysis using specialized analyzers - Casting condition control with molten metal temperature gauges and hardness testers - Leak testing using gas leak detectors - Full quality validation for metal composition equipment On-Time Delivery Commitment - Closed-loop production ensures schedule control - Strict quality and process management, especially for high-precision medical castings KOBAYASHI CASTING operates a fully integrated lost-wax casting facility in Vietnam, capable of meeting the high-precision and reliability demands of medical device components. With a strong export record to the U.S., Germany, Japan, South Korea, Taiwan, and Singapore, we combine internationally compliant quality with stable supply. For more details, please download our PDF brochure or contact us directly.