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Resin/Plastic
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第一商工

EstablishmentApril 1957
capital1000Ten thousand
number of employees64
addressNagano/Ueda-shi/Kuri 1488-1
phone0268-22-5263
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last updated:Oct 14, 2025
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第一商工 List of Products and Services

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Resin processing: cutting, molding, 3D (prototyping) Resin processing: cutting, molding, 3D (prototyping)
[Film Processing] Die Cutting, Water Plotter, Composite Processing [Film Processing] Die Cutting, Water Plotter, Composite Processing
Rubber and sponge processing: cutting, molding, punching, water jet, etc. Rubber and sponge processing: cutting, molding, punching, water jet, etc.
Metalworking: Cutting, Machining, Sheet Metal & Pressing, Surface Treatment Metalworking: Cutting, Machining, Sheet Metal & Pressing, Surface Treatment
Inorganic processing: cutting, molding Inorganic processing: cutting, molding
Rubber

Rubber and sponge processing: cutting, molding, punching, water jet, etc.

Cutting: Prototyping and Prototype Mass Production - The method of processing prototype models through rubber cutting involves machining, turning, milling, etc., where material is removed to create prototypes. Molding: Mass Production - A mold is created to produce multiple items in a single forming process. Since the number of products that can be obtained from the mold can be determined, it is suitable for mass production. Punching: Sheet Mass Production - Grooves are processed with a laser on a base material such as plywood or resin board, and a steel blade bent to the same shape as the groove is embedded in a mold for punching. Water Jet Cutting Plotter: Sheet Prototyping - A cutting plotter automatically cuts out data using a pen-type cutter. A water jet cuts by pressurizing water and spraying it through a nozzle.

We shape prototypes and small-scale production of soft materials such as rubber and sponge through cutting processing.

It is possible to perform cutting processing of soft materials such as rubber and sponge.

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.)

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Rubber and sponge punching processing

We propose the optimal rubber and sponge materials and processing methods tailored to various applications and conditions.

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.

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Water jet processing (rubber, sponge, plastic)

Water jet processing that enables fine processing of materials such as rubber, sponge, and cork. It can perform cutting and cutting-out processing with a width of 0.1 mm.

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.

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Cutting processing of rubber three-dimensional shapes (no initial costs for molds, cost reduction)

Rubber cutting processing that eliminates the need for molds and reduces initial costs.

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.

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Rubber and resin lining

Fusion with metal! Like rollers, we offer rubber and resin lining for metal. There are various applications, such as measures to prevent scratches on counterpart components with clamp parts.

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.

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Prototype with mass production materials (plastic, rubber)

We will respond to requests such as wanting to create prototypes using mass production molding materials.

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

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Press cutting process (rubber, rubber + double-sided tape)

Processing of rubber sheets such as seal packing and gaskets. Equipment available to handle small lots to mass production. Please consult us for short delivery times.

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.

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