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  2. Manufacturing and processing contract
  3. 淀川サンセイ
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Manufacturing and processing contract
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淀川サンセイ

number of employees77
addressShiga/Koka-shi/17-4 Hinokigaoka, Mizukuchi Town
phone0748-63-8860
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last updated:Mar 14, 2025
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淀川サンセイ List of Products and Services

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slit slit
Punched out Punched out
Laminating and cutting Laminating and cutting
Hot bonding press Hot bonding press
Printing Printing
Assembly Assembly
Inspection Inspection
Production examples Production examples
Cutting plotter Cutting plotter
Medical device Medical device
Production

Production examples

We would like to introduce our "case studies."

Improvement of "cracking" similar to cracks occurring on the press end face of special films.

Inspiration from leftover scraps! A case of discovering a way to insert a sponge that does not cause tearing.

We would like to introduce a case study on the improvement of "cracking" similar to cracks that occur on the press edge of our special films. We received a request to press a special film that suppresses the iridescence phenomenon into a rectangular shape using a Thomson blade. However, after approximately 9,000 uses, fine but sporadic substrate cracking began to occur again. In a hurry, we checked the pressing conditions for both the product and the waste parts, and found that the sponge used on the product side was affecting the cracking. We reviewed the sponge conditions and arrived at a method of inserting the sponge that does not cause cracking. Now, we can use the product not just for 9,000 times, but even for 30,000 times without any occurrence of cracking. [Case Summary] ■ Issues - It was found that a thin white line (substrate cracking) appeared slightly inside the cutting edge on two specific sides out of four. ■ Results - Cracking does not occur even after 30,000 uses, not just 9,000. *For more details, please download the PDF or feel free to contact us.

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[Production Example] Product processing request using PET from a medical device manufacturer.

Trial and error with materials of poor dimensional accuracy. Continuing to challenge without giving up, solving problems.

We received a request for product processing using PET from a medical device manufacturer, and we would like to introduce a case study we conducted. Initially, we attempted processing with annealing treatment at a general temperature, but the dimensions shifted after processing, and we could not achieve a dimensional accuracy within ±0.01mm, leading us to almost give up on this project. However, after researching various literature and repeatedly testing different conditions, we finally discovered annealing treatment at a temperature close to the melting point, which is far from the general temperature, as well as the heating rate, annealing temperature duration, and cooling rate. [Case Overview] ■ Request Details - Processing of products made from PET with poor dimensional accuracy after processing ■ Results - We were able to find annealing conditions that sufficiently satisfied dimensional accuracy within ±0.01mm. *For more details, please download the PDF or feel free to contact us.

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Significant reduction in defect rates in automotive parts stamping! Case study on the improvement of independently controlled molds.

A case where original molds were created, achieving improvements in quality and productivity!

We received a request for punching and contour cutting processing from an automotive parts manufacturer, and we would like to introduce a case study of our response. Initially, the designed mold was one where changing the height of the die would alter the height of both the hole and the contour. Even if we wanted to make the hole deeper, the contour would also become deeper, resulting in a high number of defective products. Through repeated trial and error, we improved the stripper plate to create a mold that allows independent processing of the hole and contour, enabling separate control of the die heights for both the hole and contour. 【Case Overview】 ■ Issues - Due to the high order volume for automotive parts, there was a process for removing defective products, which negatively impacted productivity, and there were instances where defective products mixed with good ones led to complaints. ■ Results - By using the newly developed mold for processing, the occurrence of defective products ceased, significantly improving yield and productivity. *For more details, please download the PDF or feel free to contact us.

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Automobile

We have processing experience with oil seals, seat sensors, and more! We propose and manufacture appropriate materials according to the intended use.

We process and provide various parts used in automobiles. From electrical components such as meters and car navigation systems to parts requiring heat resistance, we propose suitable materials based on their intended use and manufacture the parts. We have a wide range of processing achievements, including parts for car navigation systems, meter panels, window films, and lithium-ion battery components. 【Processing Achievements (Excerpt)】 ■ Seat Sensor ■ Oil Packing ■ Bumper Processing Parts ■ Car Navigation Parts ■ Window Film *For more details, please download the PDF or feel free to contact us.

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Electronic

Considering the properties of water resistance and heat resistance! We will design the components and processes and apply protective processing to the RFID.

At Yodogawa Sansei Co., Ltd., we process LCD-related components. We manufacture film and double-sided tape components used in smartphones, car navigation systems, and LCD televisions, considering processing and inspection methods that meet our customers' quality requirements. Additionally, in the formation of protective films through screen printing, we can create protective films without being limited by shape, making them suitable for protecting ITO and glass surfaces. 【Processing Examples】 ■ Fine pitch circuit printing ■ Capacitive sensor switches ■ Formation of protective films through screen printing ■ Protective processing for RFID *For more details, please download the PDF or feel free to contact us.

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Cosmetic-related processed products and products used in medical settings.

We can propose materials and shapes considering their intended use! We will introduce various processed products.

We offer a wide range of products, including cosmetic-related processed items such as "double eyelid tape and nail extension tape," non-woven fabric processed products, and items used in medical settings. Additionally, we also provide processed products using special materials with a thickness of a few micrometers that are virtually undetectable when applied, such as "underarm sweat film," and we apply light-blocking tape to mirrors that are mainly attached to beauty devices. We can propose materials and shapes considering the intended use. 【Processed Products (Excerpt)】 ■ Underarm Sweat Film ■ Double Eyelid Tape / Nail Extension Tape ■ Face Shield ■ Cushion Fixing Tape ■ Light-Blocking Tape *For more details, please download the PDF or feel free to contact us.

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[Processing Example] Measures against product curling through separator peeling and re-lamination.

A case where manufacturing costs have been kept down because it can be easily integrated into existing production lines!

We would like to introduce a case where measures were taken to address product curling through separator peeling and re-lamination. Curling caused by the material had occurred, but there was no response from the material manufacturer, and products were shipped with the curling as is. Customers indicated that products without curling are easier to use, prompting us to consider countermeasures. It was found that peeling the separator eliminated the curling, so we verified whether reapplying the separator would also be effective, and the results showed sufficient effectiveness. Additionally, since we were able to address the issue with reapplication rather than replacement of the separator, we implemented measures without using additional materials. [Challenges] ■ Products were being shipped with curling, but customers indicated that products without curling are easier to use, leading to the consideration of countermeasures. *For more details, please download the PDF or feel free to contact us.

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[Processing Example] Thomson Type Base Plate Shared Use with Different Devices

An example of improving the shape of the base plate to allow shared use of Thomson-type devices across different equipment!

Here is an example of the shared use of Thomson-type base plates for different devices. There are multiple types of press devices that use the Thomson type, and the shape of the base plate (foundation) to which the Thomson type is attached differs for each model. We improved the shape of the base plate so that the Thomson type can be shared among different devices. This has increased the options for processing equipment and made it possible to distribute processing to another device when focusing on one device. [Issues] - Due to the production system of small quantities and many varieties, concentrating on one processing device can lead to being overwhelmed with delivery deadlines. - Purchasing Thomson types for two different models incurs unnecessary expenses (tens of thousands of yen per unit). *For more details, please download the PDF or feel free to contact us.

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