城内製作所 List of Products and Services

"Projection welding" refers to the process of applying pressure through electrodes to contact two metal surfaces and passing a large current through them, causing the contact area to reach welding temperature due to heat generated by electrical resistance, thus bonding them together. Compared to arc welding, which can cause discoloration and oxidation at the weld area, projection welding has the characteristic of concentrating heat only at the contact area for a very short time, resulting in minimal discoloration of the weld. For projection welding bands, trust the expertise of Jounai Seisakusho, which boasts a shipping record of over 9 million units in 20 years. [Features] - Surface-treated steel plates can be used directly as products, eliminating the need for post-welding plating. - Short welding time improves production numbers. - No discoloration due to heat, resulting in a good appearance. - The welding strength is sufficient for practical use. *For more details, please refer to the PDF document or feel free to contact us.

• Welding Machine
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Jōnai Seisakusho Co., Ltd. is a company that manufactures and sells various types of bands for cans, split bands for circular flange connections, and flexible bands. We will propose the optimal "packing" based on your usage conditions. *For more details, please refer to the PDF materials or feel free to contact us.

• Rubber
• others

Since its establishment, the in-house manufacturing plant has been leveraging the roll forming curling technology cultivated over half a century to respond to the diversifying and advancing needs of our customers. We are advancing comprehensive business development from CAD to CAM and QC. We offer a variety of 'bolts and nuts' such as claw bolts, hex bolts, and hook bolts that are optimal for band usage. *For more details, please refer to the PDF materials or feel free to contact us.

• bolt
• nut

The "band for mini pails" is made from hot-dip galvanized steel sheets. It is directly processed from hot-dip galvanized steel sheets (SGCC), resulting in a glossy surface. The fastening hardware of the "SD lever" type does not require sealing and is very convenient to remove. 【Features】 ■ For mini pails ■ Directly processed from hot-dip galvanized steel sheets ■ Glossy surface achieved ■ Band diameter: Φ120–240mm ■ Material used: Hot-dip galvanized steel sheet t0.6 *For more details, please refer to the PDF document or feel free to contact us.

• others

The "stainless steel band" is a band made of stainless steel. We offer a wide range of products, including split bands for flange connections. We also accept orders for stainless steel bands for general cans. 【Features】 ■ Made of stainless steel ■ Wide range of products ■ Available in both bolt-type and lever-type ■ Band diameter: Φ240–600mm ■ Material used: stainless steel plate t0.6–2.0mm *For more details, please refer to the PDF document or feel free to contact us.

• others

The "J Band" was developed from the need to secure flexible ducts to flanges, and it is a band born from a new idea. Thanks to the flexible mechanism at the buckle, it fits perfectly on cylindrical objects. It can be easily tightened with just one screwdriver, and the length of the handle can be freely adjusted. 【Features】 ■ Ideal for securing ducts and similar items ■ Made from galvanized steel sheets ■ Perfect fit for cylindrical objects ■ Easy tightening with just one screwdriver ■ Handle length can be freely adjusted *For more details, please refer to the PDF document or feel free to contact us.

• others

The "Small and Medium Drum Band" is a band used for drums that resemble smaller versions of 200-liter drums. Through projection welding, it is possible to achieve high welding strength without discoloring the surface of hot-dip galvanized steel plates. This eliminates the need for post-welding galvanization, resulting in significant cost reductions. Furthermore, there are no welding beads, which helps maintain a high-quality appearance. Additionally, special-shaped bands can be accommodated with a three-roll machine. 【Features】 ■ Used for small and medium-sized drums ■ Does not discolor the surface of hot-dip galvanized steel plates ■ High welding strength ■ No post-welding galvanization required ■ Achieves significant cost reductions *For more details, please refer to the PDF document or feel free to contact us.

• others

The "band for drums" is a band used for drums. It is directly processed from hot-dip galvanized steel sheets (SGCC), resulting in a glossy surface. You can choose from push fittings, pull fittings, or one-touch fittings. 【Features】 ■ Used for drums ■ Achieves a glossy surface ■ Made from hot-dip galvanized steel sheets ■ Stainless steel (SUS304) is also available ■ Band diameter: Φ200–400mm *For more details, please refer to the PDF materials or feel free to contact us.

• others

The "band for 200L drums" is used for drums (open drums) with removable tops. Our projection welding can achieve high welding strength without discoloring the surface of hot-dip galvanized steel sheets. This eliminates the need for post-welding galvanization, resulting in significant cost reduction. Furthermore, there are no welding beads, which helps maintain a high-quality appearance. 【Features】 ■ Used for drums with removable tops ■ Does not discolor the surface of hot-dip galvanized steel sheets ■ High welding strength ■ No need for post-welding galvanization ■ Achieves significant cost reduction *For more details, please refer to the PDF materials or feel free to contact us.

• others

The "band for fiber drums" is a general can band characterized by its thin ring material with a thickness of 0.6mm, used for special paper drums known as craft liners. It is directly processed from hot-dip galvanized steel sheets (SGCC), resulting in a glossy surface. 【Features】 ■ The ring material has a thin thickness of 0.6mm ■ Directly processed from hot-dip galvanized steel sheets (SGCC) ■ Glossy surface ■ Folded edge processing of the steel sheet ■ Increased strength (thickness, 0.6mm product) *For more details, please download the PDF or feel free to contact us.

• Other machine elements