中井工業 List of Products and Services

The number of lots used to be large, but it has decreased now... Do you have any forged products like that? The unit prices keep rising, and sometimes we are even turned down for continued production... I want to switch to the same forging manufacturer, but I'm rejected due to the lot size... In that case, why not consider replacing it with our white heart ductile cast iron! While it has lower strength compared to forged products made of steel, it is weldable. If it has been over-spec for your application so far, you might be satisfied with white heart ductile cast iron. Although it is "cast iron," it is resistant to cracking even under strong forces and can endure while deforming. We can accommodate even if the lot size is not as large as forged products, so please feel free to contact us.

• Processing Contract
• Other metal materials
• Steel

Do you have any of the following concerns? You have parts that are made by welding multiple pressed or forged products and other steel materials. - There are many parts, making management difficult... - There are many welding processes, leading to increased costs... - There are numerous weld marks, which do not look good... - You considered integrating cast iron products, but heard that welding is not possible, so it hasn't been realized... Nakai Kogyo Co., Ltd.'s ductile cast iron can solve these problems! - It can be cast in an integrated state, reducing the number of parts! - With fewer parts, the welding processes are minimized, leading to cost reduction! - There are fewer weld marks, resulting in a cleaner appearance! - Ductile cast iron allows for welding, enabling both integration and welding! We will support you with the technology, experience, and knowledge we have cultivated over more than 90 years of history. If you are facing these issues, please feel free to contact Nakai Kogyo Co., Ltd.!

• Other metal materials
• Processing Contract
• Steel

This product is a stylish tent that is sure to be Instagram-worthy, made by connecting 2x4 lumber, which serves as the frame material, with joint fittings. Due to its polyhedral shape, it has a strength comparable to that of a permanent structure, despite being a temporary setup. Currently, we are selling the PLATO-4 (tetrahedral shape) and PLATO-8 (octahedral shape). (Left and center in the main image) Typically, tents made with wooden frames require considerable time and effort to disassemble and move due to their weight once they are set up. However, the 【PLATO JOINT】 can be secured simply by rotating the handle part 180° with the cast joint fittings and the fittings fixed at both ends of the frame lumber. This feature allows for easy assembly and disassembly. Once you get the hang of it, it can be assembled in just under 10 minutes (for two people assembling the PLATO-8). Each product comes with a starter set and a free set. The starter set has the frame lumber and fittings already screwed together, allowing for immediate assembly right out of the box. All joint fittings are equipped with eye nuts, making it possible to install hammocks or hanging chairs.

• Municipal services and business location

The white heart ductile cast iron (FCMW380-7) manufactured at our headquarters factory has the following features: 1. It is a cast iron product that can be welded. 2. It has toughness and is resistant to cracking. 3. It can be molded into thin and complex shapes in one piece. In fact, these features are also found in cast steel products (such as SC410). As can be seen from the JIS numbers, cast steel products are stronger in terms of strength. So, what are the advantages of white heart ductile cast iron over cast steel products? It is the lower product price. Cast steel products have a higher melting temperature compared to other cast iron products (FC or FCD), resulting in higher manufacturing costs and a greater frequency of defects such as shrinkage cavities. Due to these characteristics, cast steel products tend to be more expensive than other cast iron products. This is where our white heart ductile cast iron comes into play! With white heart ductile cast iron, we can lower the melting temperature compared to cast steel products during casting. While there may be some drawbacks in terms of strength and surface roughness (due to sand casting), we can achieve lower costs as a result. You may be able to reduce costs on the cast steel products you are currently purchasing! Please feel free to contact us for more information.

• Other metal materials
• Processing Contract
• Steel

The "White Heart Ductile Cast Iron Casting Products Comprehensive Catalog" features products such as "motorcycle parts" that can be formed integrally with thin walls, "automotive parts" that achieve reduced material costs, "temporary scaffolding parts" that streamline on-site construction, and "landscape material parts" that are resistant to impact. White heart ductile cast iron is strong and has excellent castability, allowing for a beautiful casting surface to be easily obtained, and it also possesses good ductility, corrosion resistance, and plating properties, as well as the ability to be welded or brazed. 【Featured Products】 ○ Motorcycle Parts ○ Automotive Parts ○ Temporary Scaffolding Parts ○ Landscape Material Parts ○ General Industrial and Machinery Parts, etc. For more details, please contact us or download the catalog.

• Other metal materials
• Processing Contract
• Steel

We would like to introduce the "motorcycle and automotive parts" that we handle. "Motorcycle parts" utilize the freedom of casting, allowing for the integration of welded assembly parts through pressing, and unlike other cast iron, they can be welded similarly to steel. "Automotive parts" can reduce material costs by changing the material from lost wax. They can be used as joints for extremely small bends that are difficult with pipes. 【Features of Motorcycle Parts】 ■ Utilizes the freedom of casting, enabling the integration of welded assembly parts through pressing ■ Allows for thin-walled integrated molding compared to other cast products ■ By considering from the design stage, shapes can be achieved that take advantage of cost, castability, and installability ■ Unlike other cast iron, they can be welded similarly to steel *For more details, please refer to the PDF document or feel free to contact us.

• Other Auto Parts

Our products made from white heart ductile cast iron are used for temporary scaffolding. They are easy to manufacture with complex and thin-walled designs, and have received evaluations for their weldability, toughness, and plating properties. We offer suggestions for shapes tailored to the specifications and uses of scaffolding, and they are widely used. Please feel free to contact us if you have any requests. [White Heart Ductile Cast Iron Product Fields] ■Automotive ■Motorcycles ■Temporary Scaffolding ■General Industry *For more details, please refer to the PDF materials or feel free to contact us.

• Other metal materials
• Processing Contract

Our products made from white heart ductile cast iron are used in two-wheeled vehicles. They are easy to manufacture with complex and thin-walled designs, and have received evaluations for their weldability and toughness, making them widely used in components such as the gusset head pipe of the main frame and cushion brackets of two-wheeled vehicles. Please feel free to contact us if you have any inquiries. 【White Heart Ductile Cast Iron Product Fields】 ■Automobiles ■Two-wheeled vehicles ■Temporary scaffolding ■General industry *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements
• Other Auto Parts
• Other metal materials

Our products made from white heart ductile cast iron are used in automobiles. Compared to ductile cast iron (FCD) and gray cast iron (FC), they have excellent weldability and plating properties, and are used as flanges for water and oil systems, welded to pipes, in many automotive engine components. Please feel free to contact us if you have any inquiries. 【White Heart Ductile Cast Iron Product Fields】 ■Automobiles ■Motorcycles ■Temporary scaffolding ■General industry *For more details, please refer to the PDF materials or feel free to contact us.

• Engine parts
• Other metal materials
• Processing Contract

We would like to introduce the "temporary scaffolding and landscape material components" that we handle. "Temporary scaffolding components" allow for smooth and compact shapes that are difficult to achieve with pressed parts. By integrating general pressed combination parts, we can reduce the number of components. "Landscape material components" are impact-resistant and have toughness that prevents them from breaking even when bent. By incorporating a nut insertion shape, we can reduce the processes of screw machining and screw trimming after plating. Please feel free to contact us if you have any requests. 【Features of Temporary Scaffolding Components】 ■ Smooth and compact shapes that are difficult to achieve with pressed parts ■ Reduction of component count by integrating general pressed combination parts ■ Functional shapes that enhance fastening strength ■ Utilizing the freedom of casting to create shapes that improve on-site construction efficiency *For more details, please refer to the PDF document or feel free to contact us.

• Other metal materials
• Processing Contract