第一商工 List of Products and Services

Do you have any projects or issues where you would like to prototype or produce soft materials such as rubber or sponge in single pieces or small quantities? Our company can shape soft materials through cutting processes to meet your requirements. We have a variety of materials with different hardness in stock, so please feel free to consult with us. (If it is difficult to manufacture due to complex shapes, we can also suggest alternative methods.)

Rubber and sponge punching processing uses a die with cutting blades embedded in a base material known as a Thomson type to punch the material. The base materials can include wood, resin boards, metal sheets, etc., and are selected based on conditions such as dimensional accuracy, production time, and cost. Although the precision is inferior to that of molding with molds, it excels in cost due to the low cost of the die. *Depending on the lot size, delivery time, and accuracy, options for cutting and molding processing may also be effective. We will propose a processing method that meets your requirements. For more details, please refer to the PDF document or feel free to contact us.

This is an introduction to water jet processing as a response to fine cutting processing of rubber and sponge. Are you having trouble with processed products such as small round holes or narrow long holes? We perform processing with a nozzle that has an injection port of 0.1 mm, so depending on the material and thickness, it is possible to create shapes that cannot be reproduced with press processing or plotter processing. Depending on the material and thickness, plastic cutting is also possible. Thanks to water jet processing, it is possible to create shapes where the cut-out part does not have a blade radius. (Please refer to the photo.) If there are shapes you thought were impossible to achieve, please consult with us.

Introducing rubber cutting processing. For those involved in cutting processing or handling processed products, it may be hard to imagine, but it is indeed possible to cut and shape soft rubber into three-dimensional forms. When people see the samples, they often say, "Isn't this rubber molding?" However, it is also possible to create certain shapes through cutting processing. There are no restrictions on material or hardness. While we cannot achieve tolerances like those in plastics or metals, we strive to meet our customers' requests as closely as possible. We do not give up just because it is rubber. Simple tasks are handled by machines, while difficult and interesting tasks are performed by humans (craftsmen). Since no molds are required, we can reduce costs and shorten delivery times. Are there any projects or shapes you have given up on thinking they would only be for one or two pieces? Please feel free to contact us.

Not only do we deliver parts, but we can also provide combinations of various parts according to our customers' requests. Please feel free to contact us when you need assistance. 【Combination Examples】 - Rubber lining for rollers and other components, resin lining - Rubber lining for large pipes - Lining for electrical insulation and noise reduction - Clamp parts to prevent scratches on counterpart components We can deliver finished products, including metal components. Please feel free to contact us.

This is an introduction to a method for producing prototypes using mass production materials before mass production. We often receive inquiries from customers who want to prototype using the materials that will be used in mass production, wish to create products with a small amount of molded material, or want to keep initial costs down. We would like to propose two possible methods for this. ■ Simple Mold Forming ■ Machining from Blocks Simple mold forming involves creating a low-cost temporary mold by changing the structure, number of cavities, and materials of the mold. This method may allow for a faster turnaround than starting with a production mold. Regarding machining from blocks, the materials that can be used are limited, but we can create blocks through molding and then machine them into products. 【Plastics】 Examples of materials used: ABS V0, PC V0, PBT GF15%, PPS CF10% (Some molded materials may require provision by the customer.) Possible size: 250×250×55 *Please note that depending on the material, it may not be possible to create blocks for plastics. Prototype costs will be incurred, but it is also possible to test the feasibility of block molding. 【Rubber】 Available materials: General press-molded materials (Please provide materials.) Possible size: 100×100×50

Our company, based in Ueda City, Nagano Prefecture, started in 1957 with rubber die-cutting processing. Based on our accumulated experience, we can handle everything from prototypes and small lots to mass production. We excel not only in die-cutting rubber sheets but also in die-cutting rubber after applying double-sided tape. Although we use a simple die called a Thomson die for press die-cutting, the initial cost of the die varies depending on its size and quantity, but it is very inexpensive compared to press molds and forming molds, ranging from several thousand to tens of thousands of yen. One of the attractive features is that we can produce the die in about a week.