特発三協製作所 List of Products and Services

At Tokuhatsu Sankyo Seisakusho, we specialize in the processing of thin plate spring products. Stainless steel has spring properties, and simply bending it will not achieve the desired shape. This is where our years of know-how come into play. We can discern the characteristics of materials and shapes to carry out the processing. There are products that can only be made by a company that has been handling springs for a long time. Please feel free to consult us, even for products that other companies have declined to process! With Tokuhatsu Sankyo Seisakusho's technology, we realize the functions of thin plate springs, such as holding, clamping, and fixing! ↓ If you want to know more about thin plate springs, click here ↓

• Spring

We can also manufacture cup washers that require load. The available plate thickness ranges from approximately 0.05 mm to 1.0 mm, and please feel free to inquire about sizes! We can accommodate prototypes starting from one piece. Materials like stainless steel are said to have springback, making bending difficult. Our company utilizes years of know-how to take on challenges with thin and small products!

• Spring

Thank you for visiting the page of Tokuhatsu Sankyo Seisakusho! Our company specializes in the processing of thin plate springs, and on this page, we introduce examples of their use. We hope this serves as a reference for the ideas of engineers. 【Clamping】 Using the spring properties of plate springs, it is possible to clamp objects, with clips being a representative example. It is also possible to attach objects by clamping them. 【Fastening/Connecting】 Thin plate springs can be used to fasten cables or connect pipes of different diameters. 【Fixing】 Thin plates also have the function of fixing and holding objects. Thin plate springs are used in vending machines to display beverages. ↓ If you would like to learn more about thin plate springs, click here ↓

• Spring

At Tokuhatsu Sankyo Seisakusho, we have 30 multi-forming machines and 8 progressive presses. We can propose the optimal processing methods for thin sheet springs and wave washers. Let us introduce the features of each machine: ○ The multi-forming machine can process complex shapes compared to presses. Additionally, it can process materials that are the same width as the product for most products, which helps reduce material waste. However, since it processes complex shapes, its rotation speed is inferior to that of the press machine. ○ The progressive press machine can increase its rotation speed and process a large quantity in a short time. It can also significantly reduce the time required for mold changes, known as setup. However, because the press operates through vertical motion, it is difficult to accommodate complex shapes. At our company, we select the optimal processing machine based on the shape of the product or perform combined processing. We can bring your ideas to life, such as "Can we make a spring like this?" or "Can we process this wave washer?" Please feel free to contact us!

• Spring

On the Tokuhatsu Sankyo Manufacturing website, we have prepared a page for load calculations that you can use freely. By simply entering the necessary information, you can check details such as load and blank dimensions. Please make use of it! <How to use> Step 1. Access the Tokuhatsu Sankyo Manufacturing Wave Washer homepage. Please come to the site via the external link. Step 2. Enter the necessary information such as material, inner and outer diameter, and plate thickness. Step 3. Press the calculation button to check the load and blank dimensions. If you find the instructions unclear or if you have calculated but are unsure if processing is possible, please feel free to contact us through the inquiry form on the website! For requests for quotes after calculations, attaching the calculation results page will facilitate a smooth response to your quote request.

• Spring

Welcome to the page of Tokuhatsu Sankyo Seisakusho! The thin plate springs we manufacture function and are useful in ways you may not even notice. On this page, we introduce the functions of such thin plate springs. 【Holding】 Thin plate springs can exhibit the function of "holding things in place." For example, they are used to secure wiring for solar panels, and our processed products are used to hold different diameter pipes in water heaters. 【Fixing】 Thin plate springs can exhibit the function of "fixing and holding." For instance, in vending machines that you often use, the reason you can take your time deciding what to drink is that thin plate springs help display cans and bottles. Additionally, thin plate springs are used in fish grilling ovens. If the door of the fish grill were wobbly or loose... it would be quite concerning, wouldn't it? Thin plate springs firmly secure the grill door, contributing to deliciously grilling fish! ↓ If you want to learn more about thin plate springs, click here ↓

• Spring

Mass production typically involves creating large, costly molds. However, our company possesses electrical discharge machines and wire cutting technology, allowing us to produce mass-produced items without molds! Producing without molds significantly reduces mold costs. We can provide estimates even from punch drawings. Please feel free to inquire about delivery times and quantities.

• Spring

At Tokuhatsu Sankyo Seisakusho, we produce molds and carry out processing separately from mass-produced items, and we also manufacture prototypes and conduct production without molds! For prototypes of thin sheet springs, disc springs, and wave washers, please leave it to Tokuhatsu Sankyo Seisakusho! We can also assist with the design of products in the research and conceptual stages with an eye toward mass production. We can accommodate prototypes starting from just one piece. 【Materials】 - Stainless steel (SUS301, SUS304), etc. - Special steel (SK85, S60C), etc. - Hardened steel (benonite steel, ribbon steel), etc. - Copper (phosphor bronze, beryllium copper), etc. *For more details, please refer to the PDF materials or feel free to contact us.

• Prototype Services

The "wave washer" is a thin plate with waves formed in a ring shape. It is also referred to as "wave washer." It is effective as a cushioning element in small spaces because it averages axial loads (thrust loads) around the circumference in response to static loads or small movements. Made from spring steel, it is a thin washer that has been bent into multiple wave shapes. Its applications include preventing loosening of screws, eliminating play between components, and serving as a spring for spacers that maintain space along the same axis. 【Features】 ■ Widely used as a spring for spacers ■ Effective for cushioning in small spaces *For more details, please refer to the PDF materials or feel free to contact us. We also have a page for load calculations for wave washers on our website, which can be useful for your designs.

• Other machine elements

At our company, we not only handle prototypes and mass-produced items but also seek new possibilities for thin plate springs, turning our customers' requests of "Can you make this type of plate spring?" into reality. We manufacture high-efficiency, high-precision, low-cost thin plate springs from a minimum thickness of 0.05mm using "multi-forming" and "progressive stamping." Through detailed discussions with our customers about usage methods, we capture the deeper aspects of their needs and provide shape proposals. For wave washers and disc springs, we can also perform load calculations and suggest designs. We can accommodate prototypes starting from just one piece. Mass production without molds is also possible. 【Main Products】 ■ Manufacturing of metal plate springs - Plate springs - Disc springs - Wave washers - Mold production - Prototype development 【Materials】 - Stainless steel (SUS301, SUS304), etc. - Special steel (SK85, S60C), etc. - Hardened steel (Bainite steel, ribbon steel), etc. - Copper (phosphor bronze, beryllium copper), etc. *For more details, please refer to the PDF materials or feel free to contact us.

• Spring

■Wave Washer Wave washers and disc springs achieve compact space while exhibiting the same spring force capabilities as coil springs. They are often used to suppress "wobble" with moderate rebound force, act as cushions, or secure components. With our unique technology that cannot be replicated by other companies, we solve your problems. ■Our strength lies in technology that cannot be replicated by others, solving your problems. Depending on the application, we propose appropriate materials and designs, and carry out everything from mold creation to production, delivery, and maintenance in a consistent manner. Additionally, while main contractors typically place orders for the same spring products with two subcontractors for insurance purposes, we also manufacture items that cannot be ordered from two companies. Our products are included in components for the world's largest mobile manufacturers and car audio systems exported to North America. "Our technology cannot be replicated by others," which is our significant strength.

• Spring

■Leaf Springs Precision thin leaf springs are incorporated into various products such as battery contacts, mobile phone hinges, and automotive parts. They apply moderate tension and utilize energy from deformation to secure and rebound products, thereby preventing loosening and escape. Tokuatsu Sankyo Seisakusho, as a specialist in precision thin sheet processing, provides optimal solutions tailored to customer needs through custom-made precision thin leaf springs, focusing on multi-forming and precision pressing processes. ■Disc Springs In the case of disc springs, we not only sell standard disc springs but also process custom-made "disc springs" as required by our customers. For more details, please check the 'Download' section.

• Contract manufacturing