光工業 List of Products and Services

We would like to introduce the "ultra-high precision mold technology" adopted in the latest fuel cells. The interconnectors and separators we have started producing are used in household SOFC cell stacks, achieving both lightweight and compact design along with high power density, resulting in reduced costs. As a result, it is expected that adoption will progress in various applications, including commercial and industrial use. [Applications] ■ Automotive parts ■ Fuel cells ■ Industrial machinery ■ Home appliances, etc. *For more details, please refer to the PDF document or feel free to contact us.

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Here is an introduction to the process leading up to the completion of the press mold. Upon receiving the request, we confirm what kind of mold should be prepared, consider the machine's capabilities and specifications, and determine the mold's functions. We arrange the materials and parts needed to create the mold, process each mold component based on the design drawings, and carry out surface treatments, assembling them sequentially as they are completed. After the mold is finished, it is installed in the press machine, and product samples are created. We evaluate the quality of the samples and perform measurements, making fine adjustments as necessary, which constitutes the final check of the mold. 【Process until completion】 ■ Discussion and consideration meeting ■ Creation of mold design and processing data ■ Mold processing and assembly ■ Trial and sample production *For more details, please refer to the PDF document or feel free to contact us.

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To manufacture press molds, various equipment is required for each process, such as design and machining. With CAD/CAM, it is possible to create molds on a computer and perform simulations. Grinding processing refers to the process of removing material from a surface using a rotating grinding wheel. This process is performed during the finishing of molds. 【Required Equipment】 ■ CAD/CAM ■ Cutting processing ■ Grinding processing ■ Electrical discharge machining *For more details, please refer to the PDF document or feel free to contact us.

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The punch materials used include SKS3, SKD11, SKH51, and powder high-speed steel, as well as carbide. SKD11 is the standard. SKS3 may be used for small-scale production. SKH51 is used when the shape is small or when toughness is required. Powder high-speed steel and carbide are used for wear resistance or when there is a high production volume. 【Materials Used】 ■SKS3 ■SKD11 ■SKH51 ■SKH51 and powder high-speed steel ■Carbide *For more details, please refer to the PDF document or feel free to contact us.

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We would like to introduce the materials used for the "packing plate," which is a component of press molds. Typically, SKD11 is used. For molds produced in small quantities, SK material or SKS3 is used. The use of wire-cut electrical discharge machining for mold making has become mainstream, and this trend has become common. 【Materials Used (Partial)】 ■SK Material ■SK3 ■SKD11 *For more details, please refer to the PDF document or feel free to contact us.

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The stripper primarily functions to remove burrs, but it is increasingly common for it to also play important secondary roles, such as holding materials in place and guiding the punch tip (punch guide). When focusing on burr removal in small-scale production, S50C or pre-hardened steel is used. When adding punch guides or material holders, materials such as SKS3 and SKD11 are used after heat treatment. 【Materials Used (Partial)】 ■S50C ■Pre-hardened steel ■SKS3 ■SKD11 *For more details, please refer to the PDF document or feel free to contact us.

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The "punch plate" is used to hold small punches. Typically, materials such as SS400 and S50C, which are not heat-treated, are used. For molds that are mass-produced, pre-hardened steel with a certain degree of hardness or heat-treated SKS3 or SKD11 may also be used. 【Materials Used (Partial)】 ■SS400 ■S50C (S55C) ■SKS3 ■SKD11 ■Pre-hardened steel *For more details, please refer to the PDF document or feel free to contact us.

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Here is an introduction to the materials used for the "packing plate," which is a component of press molds. For backup purposes, SK material is used after heat treatment (approximately 56 HRC). SKS material is used when high rigidity is required. Materials that are used without heat treatment, such as S50C, are employed for backup of components like punches with a large pressure receiving area, or for purposes such as preventing detachment and height adjustment. 【Materials Used (Partial)】 ■SK3 ■SK5 ■SKS3 ■S50C *For more details, please refer to the PDF document or feel free to contact us.

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We would like to introduce the materials used for the "Punch Die Holder." The "Punch Die Holder" is the part that attaches the mold to the press machine, and at the same time, it supports the rigidity of the mold and serves as a space for height adjustment of the mold and components like springs. Generally, it is made of SS400 or S50C. There is no significant difference between the two in terms of characteristics. 【Materials Used】 ■SS400 ■S50C (S55C) ■FC250 ■SKS3 ■A7075 *For more details, please refer to the PDF document or feel free to contact us.

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The press mold is composed of multiple parts. Each part has its own function, and it is only when components such as the punch and die, which are directly related to the product, as well as the punch plate and die plate that incorporate these parts, are assembled that the press operation can take place. If even one of the constituent parts is missing, press processing cannot be performed. 【Components and Parts (Partial)】 ■ Punch: A tool used by pressing against the material ■ Die: Known as the female mold, it is the component that pairs with the punch ■ Die set: A component that fixes the mold to the press machine and allows for precise vertical movement ■ Guide post: A necessary part for aligning the centers of the upper and lower die sets ■ Punch plate: A plate that maintains the position and vertical state of the punch *For more details, please refer to the PDF document or feel free to contact us.

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By performing processes such as cutting, bending, drawing, and compression, various types of molding can be achieved with press molds, which come in several types. The "single-stroke mold" allows for the installation of one press mold per machine since each process is independent. The "progressive mold" is a type of press mold that arranges multiple processes within the mold, enabling complex shape processing. The "transfer mold" is equipped with a single transport mechanism and can carry multiple independent molds, allowing for high production in a short time. [Types] ■ Single-stroke mold ■ Progressive mold ■ Transfer mold *For more details, please refer to the PDF document or feel free to contact us.

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This document introduces the fundamental knowledge of molds, which are important in metal pressing processing. It provides detailed explanations of the types of press molds, their components, and the materials used, one by one. Our company contributes to solving our customers' problems with pressing technology. [Contents (partial)] ■ What is a press mold? ■ Types of press molds ■ Components of press molds ■ Materials used for press molds *For more details, please refer to the PDF document or feel free to contact us.

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Until now, similar products have been manufactured using "burring + crushing" or "drawing + wobbling" for the cylindrical tip (seal surface), but they were unable to meet the customer's requirement of Rz3.2. Our company has responded to customer inquiries and applied a different forging technique than before, enabling us to meet the roughness requirement for the tip seal surface (Rz3.2) and fulfill customer requests. We are currently producing 50,000 units per month, and we expect this number to increase further in the future.

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The "MF Technology Award" is the highest award in the world for press, sheet metal, and forming machines, organized by the Japan Forging Machinery Manufacturers Association. It combines essential elements of metal forming (MF), such as forging machines, product processing, and research. This document provides a detailed introduction to the awarded technology. By constraining the product's shape with UL presses and processing with zero clearance molds, we achieved processing without causing any deformation even with a plate thickness of 8mm, and without any damage to the molds. Please feel free to download and take a look. [Contents] ■ What is the MF Technology Award ■ Introduction of Awarded Technology (1) ■ Introduction of Awarded Technology (2) ■ Article published in the Nikkan Kogyo Shimbun ■ Frequently used industries *For more details, please refer to the PDF document or feel free to contact us.

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We would like to introduce points for reducing costs in mass production manufacturing. While machining through cutting allows for high-precision finishing, it requires a corresponding amount of processing time. Press processing, although slightly inferior in terms of precision compared to cutting, is overwhelmingly superior in production efficiency. If parts that were previously manufactured through cutting can be produced using press processing, significant cost reductions can be expected. 【Advantages of Press Processing】 ■ By creating a progressive die, products can be processed semi-automatically. ■ If the shape is suitable for press processing, it is well-suited for mass production. ■ Choosing press processing for long-term mass production increases productivity. ■ By setting up a die on the press machine, it is possible to repeatedly produce the same product. ■ Depending on the product shape and flow period, there may be advantages even for small lot products. *For more details, please refer to the PDF document or feel free to contact us.

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We are offering a technical handbook that describes the basic knowledge of press processing, which may seem familiar yet is not well understood. The handbook clearly explains the advantages and disadvantages of press processing, examples of products produced through press processing, and the various types of press processing methods. "Press processing" is commonly used in food factories, the seafood industry, automotive parts factories, and waste disposal facilities. If you would like a copy of the technical handbook, please feel free to contact us. 【Contents】 ■ What is metal press processing? ■ Advantages and disadvantages of press processing ■ Examples of products produced through press processing ■ Types of press processing methods ■ Proportions and characteristics of press processing molds ■ Types of processing methods using press processing molds ■ Production processes through press processing *For more details, please feel free to contact us.

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We would like to introduce the "Solenoid Valve Parts" that we handle. The stainless steel tapered cylindrical part is manufactured in two thicknesses, using NSSC190 as the material. Currently, we produce 200,000 units per month and can accommodate requests for mass production. Please feel free to consult us when you need our services. 【Features】 ■ Material: NSSC190 ■ Dimension examples - Left: Flange diameter φ24 × cylindrical part φ14 × H17mm - Right: Flange diameter φ30 × cylindrical part φ17 × H20mm ■ Tolerance range examples: Flatness 0.02, coaxiality 0.03-0.04, inner diameter 0.05 ■ Processing details: Press processing - cleaning - packaging *For more details, please refer to the PDF document or feel free to contact us.

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The conventional product involved machining the tip of the cylindrical part, improving the appearance of the product surface and deburring through barrel processing, and performing magnetic annealing to suppress magnetization after pressing. However, our company has achieved the ability to complete the process with just pressing, contributing to significant cost reduction. This product is used in solenoid valves by major manufacturers.

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"Metal press processing" is a method of processing in which a pair of molds is attached to a press machine, and a metal sheet is clamped and subjected to a large amount of pressure to deform it into the shape of the mold. The main materials processed are metals such as iron, stainless steel, aluminum, and titanium. By manufacturing molds tailored to various shapes for each product, it is characterized by the ability to mass-produce. We are offering a technical handbook. Please take a look. [Main materials processed] ■ Iron ■ Stainless steel ■ Aluminum ■ Titanium ■ Copper ■ Magnesium *For more details, please refer to the PDF document or feel free to contact us.

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In "press processing," molds are required for each product shape, but it is possible to mass-produce uniform and highly precise products according to the shape of the mold. By setting the material in a fixed position on the mold set in the press machine, processing can be done easily, making automation straightforward and allowing for cost reduction in processing. However, creating molds requires skill, and high-precision molds necessitate expensive machinery and equipment. We are offering a technical handbook. Please take a look. 【Advantages】 ■ Capable of mass-producing uniform and highly precise products according to the shape of the mold ■ Does not require skilled techniques, allowing beginners to produce the same products ■ Easy to automate and can reduce processing costs ■ Capable of processing complex three-dimensional shapes without seams ■ Lightweight and strong due to the preservation of the fine fibrous structure of the metal *For more details, please refer to the PDF materials or feel free to contact us.

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The first thing that comes to mind when it comes to items manufactured through "press processing" is automotive parts. It is said that more than two-thirds of items produced through press processing are automotive parts, and in recent years, due to the rapid shift to electric vehicles (EVs), there has been an increase in the use of components related to batteries, among others. Additionally, various parts in household electrical appliances also utilize press processing. We are offering a technical handbook. Please take a look. 【Examples of Automotive Parts】 ■ Engines and exhaust systems ■ Large parts that make up the framework, such as doors, hoods, and bodies ■ Suspension, steering, and motors ■ Battery-related components, etc. *For more details, please refer to the PDF materials or feel free to contact us.

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Here is an introduction to the types of "press processing." "Shearing," "bending," "drawing," and "forming" are processing methods that utilize the stretching force when pulling the metal workpiece. On the other hand, "compression processing" takes advantage of the property that the metal workpiece does not return to its original shape after being compressed. Various product shapes are created by combining multiple processing methods. We are offering a technical handbook. Please take a look. [Types] ■ "Shearing" to separate the workpiece ■ "Bending," "drawing," and "forming" to deform sheet materials ■ "Compression" to deform block materials *For more details, please refer to the PDF materials or feel free to contact us.

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"Press processing" is fundamentally carried out in a manner that matches the shape and dimensions of the mold. Therefore, if there is a highly accurate mold, a highly accurate product can be produced; however, if the mold's accuracy is low, the product's accuracy will also be inferior. Mold production requires significant costs, time, and advanced machinery. In addition to designing dedicated molds for each product, many molds have complex shapes, which also requires considerable costs and time for production. We are offering a technical handbook. Please take a look. [Features] ■ Dedicated molds are required for each product processing step ■ Mold production requires significant costs, time, and advanced machinery ■ Many molds have complex shapes, leading to high production costs and time ■ High-precision machinery is necessary for mold production *For more details, please refer to the PDF materials or feel free to contact us.

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This is an introduction to the types of processing methods using molds for "press processing." A single-stroke mold is a simple mold used for only one processing step, where materials are set and processed by hand in a single-stroke press. A progressive mold is used in a progressive press that can automatically perform multiple processing steps, while a transfer mold is a series of single-stroke molds arranged in sequential processing steps, used in a transfer press. We are offering a technical handbook. Please take a look. 【Single-Stroke Mold Features】 ■ Materials are set and processed by hand in a single-stroke press. ■ There are various types of molds such as punching molds, bending molds, forming molds, and drawing molds. ■ The cost of mold production can be kept low. ■ It is necessary to set the materials by hand for each processing step. ■ Mainly used when production quantities are low. *For more details, please refer to the PDF document or feel free to contact us.

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We would like to introduce the flow of production through "press processing." The production of molds begins with design, followed by machining, finishing, and assembly based on the drawings, resulting in the creation of the molds. Next, we arrange the materials, set up the process, create and inspect samples, and then press process the products based on the work standards. After the product launch, we conduct intermediate inspections and final inspections. The products are transported to the designated location using the specified packaging method and handed over to the next process. We are offering a technical handbook. Please take a look. 【Production Process】 ■ Mold Production ■ Press Processing - Material arrangement/setup/sample creation/inspection/mass production/product inspection/delivery *For more details, please refer to the PDF document or feel free to contact us.

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A fully automated process from material input to press processing, drying, and packaging. Since there is no human touch, contamination is minimized. The pressing is done with dry oil, and the drying process eliminates any residual oil, ensuring no issues with wettability. - Monthly production of 250,000 units is possible for mass production. - Used in EV vehicles of domestic automobile manufacturers (40 pieces per vehicle).

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• Secondary Cells/Batteries

The "HEAT SINK" is a heat dissipation material for automotive lithium-ion batteries. The material is C1020R-H, and it dissipates heat by being sandwiched between lithium battery packs (cells). Additionally, the EV cells produced by Kōkōgyō using this product have a compact sheet shape of 261×216mm while possessing a large volume. 【Features】 ■ Fully automated production line from material input to pressing and packaging ■ Minimizes contamination without human touch ■ Pre-processing uses dry oil to eliminate residual oil during the drying process ■ EV cells: Achieve excellent heat dissipation and high energy density ■ Modules: Compact shape enhances vehicle mounting efficiency *For more details, please refer to the PDF document or feel free to contact us.

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• Secondary Cells/Batteries

This is a complex shaped stamping product used for male-female fitting. To ensure that customers can assemble it smoothly and that it does not leak during use, optimal clearance is required, achieving a face clearance of 0.16 mm during fitting. It balances leak prevention with workability during fitting and has been adopted by major Tier 1 companies. The outer part is made of stainless steel with significant springback, requiring contour accuracy in the hundredths for both male and female components, which we address with our unique press forming technology developed over many years in fuel supply unit processing. This product also accommodates barrelling processing, which is said to be very difficult due to the tight bending edge. The inner part is processed in a progressive manner with groove and drawn shapes, and we conduct precision management of individual parts to ensure that five stacked sets can fit together with the outer part at the required precision.

• Other Auto Parts
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This is a complex shaped stamping product that is used by fitting male and female parts together. To ensure that customers can assemble it smoothly and prevent leaks during use, an optimal clearance is required, achieving a face clearance of 0.16 mm during fitting. The outer part is made of stainless steel with significant springback, requiring contour accuracy in the 100-micron range for both male and female components, which is addressed using the unique press forming technology developed over many years in fuel supply unit processing. The inner part is processed in a progressive manner with groove and drawn shapes, and precision management of individual parts is conducted to ensure that five stacked sets can fit together with the outer part at the specified accuracy. This achieves both leak prevention and workability during fitting, leading to adoption by major Tier 1 companies.

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• Other Auto Parts

A long version of the pipe with a spool, manufactured from a single plate through deep drawing processing, has been developed. It has been extended from the conventional max. 80mm to a maximum of 95.5mm, which is 15.5mm longer (including two spool parts. The length when straight is over 100mm). **Features** - The processing by pressing reduces dimensional variation, ensuring stable quality. - The pressing process allows for flexible responses to large lot demands and sudden increases in demand. - Continuous processing by pressing enables cost-effective manufacturing compared to other methods. - The deep drawing process eliminates seams, ensuring product strength. - We implement quality control that meets the requirements for critical safety components used in automotive engines. We have been adopted by major automobile manufacturers and are currently producing 18,000 units per month. We also accept bending processing in separate processes based on customer requests. We can accommodate shapes such as bulged and multi-stage designs. *For more details, please feel free to contact us.*

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We would like to introduce our capital investment in equipment. We are making proactive investments not only in press machines that directly produce products but also in production equipment for molds, which are tools for producing products, achieving a comprehensive lineup. We are actively incorporating automated machines that we have manufactured ourselves, such as spot welding machines and automatic inspection machines, which not only reduce costs by decreasing the number of workers but also aim to further improve productivity and stabilize quality. 【Equipment】 ■ Ultimate Precision Forming (UL) Press 　(Aida Engineering) ■ 5-Axis Control Machining Center (Yasuda Manufacturing) ■ Wire Cut Electric Discharge Machine (SODIC) ■ Automatic 3D Measuring Instrument (Mitutoyo) ■ Spot Welding Machine *For more details, please refer to the PDF document or feel free to contact us.

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We would like to introduce a case study of near-net shape processing for stainless steel thick plate flanges. This product is a culmination of our company's thick plate processing technology for SUS, which we have developed over the years, including full shear processing, inner surface step processing, minimal flare processing, plastic flow forming, flat surface processing, and minimal burr processing. The outer circumference is in a fully sheared state, with minimal flare for a SUS thick plate. The inner surface of the hole also exceeds 90% shear area (customer requirement is 70%). [Results] - The outer circumference is in a fully sheared state. - Minimal flare is maintained for a SUS thick plate. - The inner surface of the hole also exceeds 90% shear area. - Step processing on the inner surface of the hole. - Burring processed through plastic flow forming. - Minimal burr processing to keep polishing allowance to a minimum. *For more details, please refer to the PDF document or feel free to contact us.

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We would like to introduce a case where processing was achieved at "1/16th" of the limits of press processing. This product is made of thick plate and is designed with large cutouts on the outer circumference due to space constraints, with a thickness of 1mm at the cutout section for an 8mm thick plate. Previously, machining was necessary, but we developed a unique method that allows for production using only pressing and rotary grinding, contributing to a 35% cost reduction compared to conventional methods. [Results] - By enabling processing with only pressing and rotary grinding, we contributed to a 35% cost reduction compared to conventional methods. - The inner diameter meets almost all shear surface requirements (customer requirement is over 70% shear surface). - Taper processing for hole entry, which is difficult without machining, is also handled by pressing. - Three linear beads (linear protrusions) with an inner diameter of R0.25 are also processed by pressing. *For more details, please refer to the PDF document or feel free to contact us.

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In this document, we introduce "Key Points for Reducing Costs in Mass Production Manufacturing." We explain the points while presenting 11 examples of cost reduction. This document is a must-read for those considering replacing automotive parts with press processing. Since our establishment in 1964, we at Mitsu Kogyo Co., Ltd. have been closely supporting our customers' challenges and have achieved high-level processing that was thought to be impossible with press processing. Based on our processing examples, we present key points for reducing costs in mass production manufacturing. Due to previously using other methods for processing, various issues arose, such as production not keeping up, quality problems, and high costs. We have replaced these methods with press processing. At Mitsu Kogyo, we have been able to build a strong trust relationship with our customers and accumulate outstanding press technology by continuously solving our customers' challenges through timely investments in equipment and technology development based on a stable financial foundation. "Are you really processing something like this with a press? That's amazing!" We often receive such comments from many first-time visitors to our company. *For more details, please check the PDF or feel free to contact us.*

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This is a product made of stainless steel with a diameter of 80mm and a thickness of 3mm, featuring 34 holes with a diameter of 10.2mm. In conventional press processing, it is said that a pitch of twice the plate thickness is required between holes, meaning that for a plate thickness of 3mm, a hole pitch of 6mm is necessary for the press processing to be feasible. However, the hole pitch of this product is a minimum of 0.95mm, which is less than one-sixth of the value considered the limit for press processing, so the customer had no choice but to handle all the holes through machining. Naturally, this resulted in increased production time and costs, causing significant difficulties for the customer. Upon consulting with us, we began developing a press processing method. After various twists and turns, we succeeded in converting the entire process to press processing (excluding the finishing burr removal barrel), achieving significant cost reductions, which greatly pleased the customer.

• Engine parts
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■This is a product with angled holes for flange installation on pipes. ■A Φ19 hole is drilled at a 60° angle to the top surface. ■Traditionally, due to issues with mold life and quality, angled hole drilling on flat surfaces could only be addressed through machining such as drilling, but our company has achieved this processing solely through pressing. ■Since it is processed by pressing, the processing speed is fast, and there are advantages in maintaining stable quality for hole diameter, hole pitch, and burr height. ■Additionally, unlike drilling, the generation of chips is minimized, so there is no need for burr removal or cleaning after processing. ■This product meets the request for angled holes, but the scrap portion where the angled hole is removed also has a shape with a slope on the outer contour, allowing for applications to meet requests for products with a sloped outer contour.

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This product is used in air conditioning compressors, which means it is subjected to significant pressure, often requiring the use of high-strength materials such as thick high-tensile steel plates. When processing this material through pressing, concerns arise regarding its poor plasticity due to its high strength. However, our company has applied drawing processing to 6mm thick high-tensile material, forming it into a cup shape. Additionally, this product also involves drilling holes in a vertical direction relative to inclined surfaces. When drilling vertically into the inclined surface of a steel plate, excessive force can be applied to the piercing punch, significantly compromising its shape retention. Traditionally, the maximum allowable angle for inclination was set at 30°. Through innovations in the tip angle and shape of the punch, the material and surface treatment of the punch, and the lubrication method during processing, our company has been able to accommodate an inclination angle of 45°. As a result, the drilling process through machining has been reduced, leading to cost savings. For more details, please feel free to contact us.

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This is a technology developed based on consultations with customers who previously applied copper paste for brazing by hand, one by one. By applying this technology, there are the following benefits: 【Benefits】 1) The paste application as a pre-treatment before entering the brazing furnace becomes unnecessary. (Labor cost reduction) 2) Since a precise amount of copper is automatically embedded, the variation in usage between expensive copper products and lots is eliminated. (Reduction in material costs by eliminating inconsistencies and waste) 3) Brazing defects due to excess or insufficient filler material are eliminated. In fact, the customer’s brazing defects caused by this issue, which were nearly 30% before applying this technology, have been almost eradicated with its application. (Stabilization of quality and improvement in yield) 4) Unlike paste, there is no concern about dripping, significantly increasing the freedom of positioning inside the furnace and enhancing brazing efficiency. *For more details, please feel free to contact us.

• Engine parts
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The product is a cold forged flange that minimizes post-processing. It is a replacement for machining methods. Compared to machining, it achieves a significant cost reduction of over 90% (with a product unit price of less than 10%). It also accommodates inner surface finishing and tapered processing at the inlet through press processing. T 10.2 x 43 x 34. The material is S20C. 【Processing Details】 ■ Cold forging press processing ■ Nut spot ■ Inspection *For more details, please refer to the PDF document or feel free to contact us.

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This product is a deep-drawn cup used for fuel delivery pipes. 【Features】 - The part that holds the fuel injector requires a high surface roughness, which we meet through press processing to satisfy customer demands. - The structure is designed to weld the cup's side to the square pipe of the main body, so we have applied flat processing (D-cut) on the side and linear protrusion processing for projection welding. - Since the entire process is automated, it offers high mass production capability, cost performance, and excellent quality stability. *For more details, please refer to the catalog or feel free to contact us.

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This product is a cup with a press-finished inner mirror surface. It is used in units that supply fuel to automotive engines. 【Features】 - As a critical safety component where fuel leakage is absolutely unacceptable, it meets the quality standards required by our customers. - It has been adopted by most Japanese car manufacturers, with a total sales record of 3 million units per month and over 700 million units cumulatively across the entire series. - It is estimated that this product is used in more than 30% of the vehicles produced by Japanese automotive manufacturers worldwide (according to our calculations). - By replacing machining processes, we have achieved a 50% cost reduction. For more details, please refer to the catalog or contact us.

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• Engine parts

This product is a press-finished piping fitting component. It is used with an O-ring installed in the groove part to join with iron pipes. Traditionally, it was handled with machined products, but by transitioning to press manufacturing, we have achieved significant cost reductions and can meet large-scale demand. 【Features】 - Sales began in 2012, with a monthly sales record of 50,000 units and a cumulative total of 2 million units sold. - This product is used in the cooling water pipes of major automobile manufacturers, but it can be applied in various fields. - If a demand of over 10,000 units per month is expected, we believe that the cost benefits can be realized even with mold development. We design molds according to customer specifications, so please consult us regarding materials, sizes, and shapes. *For more details, please refer to the catalog or feel free to contact us.

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■This product, "Shell for EGR Cooler," is a specially shaped stamping that meets the contour accuracy requirement of 100 microns for fitting purposes. ■It is a complex shaped stamping used by fitting the upper and lower parts together, requiring optimal clearance to ensure that customers can assemble smoothly and prevent coolant leakage during use. ■Made from stainless steel with significant springback, both the upper and lower parts require a contour accuracy of 100 microns, which is addressed using the uniquely shaped pressing technology developed over many years in fuel supply unit processing. ■The end face clearance during fitting is achieved at 0.16 mm. ■This product also accommodates barrelling processing, which is said to be very difficult, at the bending end face. *For more details, please feel free to contact us.

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This product is a 5mm thick stainless steel bracket used in fuel injection systems for direct injection engines. We have achieved a processing technique in stainless steel where the distance between holes and the outer circumference is half the thickness of the plate, which is considered difficult with press processing. The inner and outer diameters are almost entirely shear surfaces (customer requirement is a fracture surface of 30% or less). It has been adopted by major automobile manufacturers, with a monthly sales record of 250,000 units and a cumulative total of 10 million units sold. If you have any requests regarding press die manufacturing, press processing, or sub-assemblies, please feel free to contact us. *For more details, please refer to the catalog.

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• Engine parts

Challenging the limits of press processing for 50 years. This is an introduction to Mitsu Industry Co., Ltd., which responds with a reliable integrated production system from mold making to press processing and quality inspection. To capture changes and respond flexibly, and to achieve results that exceed expectations, our company has established a consistent production system that responsibly handles everything from specification discussions to shipping. We have created an environment that can meet a variety of requests, from small-batch production to mass production. *For more details, please refer to the PDF document or feel free to contact us.

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