株式会社南雲製作所 List of Products and Services

Burrs that inevitably occur when using press molds. Are there ways to reduce burrs? Why do burrs occur in the first place...? Many may wonder if it's possible to create molds that produce no burrs at all. If we can minimize burrs, we can enjoy many benefits, such as reducing the time for burr removal and ensuring product accuracy. This document will explain in detail why burrs occur in press molds and what measures can be taken to minimize them. Contents included: ■ Causes of burrs and countermeasures ■ Methods for burr removal ■ Is it possible to achieve burr-free (producing no burrs at all)? ■ Achieving high-precision product processing while minimizing burrs *For more details, please refer to the catalog download below.

• Press Dies

Burrs that inevitably occur when using press molds. Is there a way to reduce burrs? Why do burrs occur in the first place...? Many people may have such questions about whether it is possible to create molds that produce no burrs at all. If burrs can be minimized, there are many benefits, such as reducing the time for burr removal and ensuring product accuracy. In this document, we will explain in detail why burrs occur in press molds and what measures can be taken to minimize them. Nagumo Manufacturing will be exhibiting at the Kyushu Machine Element Technology Exhibition in Fukuoka, which will be held from November 29 (Wednesday). We look forward to your visit. *For details about the exhibition, please refer to the basic information!

• Press Dies
• Mold Design
• Other machine elements

This time, I will explain "surface roughness," which is essential in metal processing. Drawings always include symbols or indications that specify the desired surface roughness. I will explain what the indicated surface roughness actually means using photographs. Additionally, I will introduce which machine tools can generally achieve what level of surface roughness during processing. When machining a surface, be sure to check if the machine is suitable for the desired surface roughness.

• Other machine elements

The term "nested" in molds is something you may have heard of but not fully understand. Many people might not be clear on the actual advantages and disadvantages. If you utilize a nested structure mold in the appropriate situations, you can enjoy many benefits. However, there are also cases where it is not necessary to spend money to create a nested structure. This time, we will provide a detailed introduction to the situations in which a nested structure is adopted, from the perspective of advantages and disadvantages.

• Other machine elements

"We are troubled by the short lifespan of punch and die for press molds." "We cannot ensure the accuracy of the punch and die." "We want to improve the wear resistance of the punch and die." In response to the voices of our customers that we often hear during our sales activities, Nagumo Seisakusho proposes a processing method that differs from conventional electrical discharge machining. It is common to use cemented carbide or hardened materials for punches and dies, and electrical discharge machining or grinding is primarily used to process these hard materials. In this document, we will introduce the mechanism of electrical discharge machining and the disadvantages that arise from it, and we will propose processing methods aimed at resolving those disadvantages. Our company will be exhibiting at the Machine Elements Technology Exhibition in Osaka starting from October 4th. We sincerely hope you will visit us. *For details about the exhibition, please refer to the basic information!

• Other machine elements

Material: Carbide Lot: 1 to 100 pieces Precision: Less than 1/1000mm Machining and polishing of carbide. Two shape sections: Inner diameter: φ2.5 Depth: 0.9 Bottom R: SR3 Industry: Automotive (prototype) Electronic components Semiconductors We accept orders starting from just one piece of equipment parts or mold parts!

• Press Dies
• Mold Design

Lot: 1 to 100 pieces Accuracy: 1/100 to 1/1000 mm Material: Carbide (ultrafine particles) Sample material size: φ6 Machining surface: Machined by cutting on the recessed part and the upper surface Features: By performing electrical discharge machining followed by cutting, we reduce the polishing of the discharge surface and the number of machining processes Industry: Automotive (prototyping) Electronics and home appliances Electronic components We accept orders starting from just one piece of equipment parts or mold parts!

• Press Dies

By switching from electrical discharge machining to cutting machining, we can reduce the polishing of the discharge surface and the number of processing steps! Lot: 1 to 100 pieces Precision: 1/100 to 1/1000 mm We accept orders starting from just one equipment part or mold part!

• Press Dies

"I would like to purchase molds from two companies as a BCP measure, so could you provide some advice?" Recently, we received this kind of inquiry from a customer. Molds are very important in factories, as manufacturing can come to a halt without them. Therefore, it is crucial to have multiple suppliers that can respond immediately when the need arises. There are cases where the specifications of molds can become a quality bottleneck, such as when a situation arises like, "If we could reduce the size of the part by another 2mm, we could proceed with this design, but since the mold couldn't accommodate it, we had to make significant changes to the design, causing delays." I have heard that recently, some clients are requesting dual sourcing. Our company has a department specialized in technological development that will do its utmost to address our customers' technical issues, so if anything resonates with you, please feel free to contact us. *For more details, please refer to the PDF document or feel free to reach out to us.*

• Mold Design

Clearance (CL) refers to the gap between the punch and die of a mold. CL is set at 4-7% of the material thickness. The range of 4-7% is determined by the thickness of the material. In the PDF document, we introduce: - Examples of clearance settings by material thickness: t=0.1mm / t=0.05mm / t=2.0mm - The impact of uneven clearance based on material thickness - The benefits of achieving uniform clearance Table of contents: - What is clearance? - How to set clearance - Examples of clearance by material thickness - Benefits of achieving uniform clearance

• Technical and Reference Books

Recently, we have received many requests for mold manufacturing from our customers, and in order to meet their expectations, we have introduced a highly productive machining machine. The Z-axis can cut in increments of 0.1μm, allowing us to easily achieve a tolerance of ±0.002mm. The Y-axis can also be controlled by NC, enabling automated groove processing through programming. We accept orders not only for molds but also for individual plates, so please take this opportunity to utilize our services. 【Machining Machine Information】 ■ Manufacturer: Okamoto Machine Tool Works, Ltd. ■ Machine Type: High-Precision Surface Grinding Machine ■ Model: PSG65SA1 ■ Axis Movement: X600mm Y500mm Z410mm ■ Installation Date: October 2022

• Grinding Machine

In this column, I will introduce the "boat bottom phenomenon"! When you want to punch out terminal shapes like those in the icon diagram, processing them at every pitch, as shown in Figure A, results in a reduced area for holding during the punching process. This can lead to situations where the punch comes down with such force that the stripper plate cannot hold the product securely, causing it to tilt over. This is known as the boat bottom phenomenon. The tilted product resembles a boat bottom, hence the name. To avoid this, changes in layout are necessary. For example, one solution could be to use multiple pitch feeding as shown in Figure B. In the case of multiple pitch feeding, a single group is punched out in one go (all punches come down simultaneously), leaving no room for the product to tip over, thus preventing such issues. However, on the other hand, this will narrow the spacing between the dies, which raises concerns about die strength. It is essential to determine specifications based on strength calculations.

• others

In the previous columns, we introduced single-stroke and progressive molds. This time, we will introduce the third type, transfer molds! Transfer molds are a type of mold where multiple single-stroke molds are arranged in a row. Like progressive molds, they use coil material (for more on coil material, refer to Column 2). The molds are moved between each single-stroke mold using a fixture called a finger, allowing the process to advance to the next stage. This processing method is automated, making it suitable for mass production. The advantages include the ability to mass-produce due to automation and stable quality. Additionally, it allows for an increased number of processes compared to progressive molds, enabling more complex machining. The disadvantages include the difficulty in designing the transport mechanism to move between single-stroke molds and the fact that having multiple single-stroke molds in line results in a relatively higher cost. Transfer molds are suitable for complex products that require processes like drawing. In the next column, we will introduce the "hull phenomenon"!

• Technical and Reference Books

In the previous column, we introduced that there are mainly three types of press molds, focusing on the single-stroke mold. In this column, we will introduce the progressive mold! A progressive mold refers to a type that incorporates multiple processing methods, such as punching, bending, and drawing, into a single mold. This processing method sends the material to the next stage with each press, shaping the product. The material used is typically in a rolled form (coil material) and is automatically fed to the next stage. The advantages include improved production efficiency and stable quality due to automation, as well as the ability to perform more complex processing compared to single-stroke molds since multiple processes can be incorporated. On the other hand, the disadvantages include the complexity of the mold design and manufacturing compared to single-stroke molds, which makes the production cost of the mold relatively high. Additionally, there is a possibility of a "boat bottom phenomenon," where a shift occurs at the tip of the product. (We plan to cover the "boat bottom phenomenon" and "shift" in a future column!) Products suitable for progressive molds are those that require mass production or complex processing. In the next column, we will explain the "transfer mold"!

• Technical and Reference Books

This column is about press molds! There are several types of "press molds." - Single-stroke molds - Progressive molds - Transfer molds The main three are listed above. This time, I will introduce the "single-stroke mold"! A single-stroke mold is a type of mold that performs processes such as cutting, bending, and drawing only once with a single mold. The advantages include lower costs compared to other types of molds due to having only one process and a simpler mold structure, as well as the possibility of shorter delivery times for the same reasons. In terms of quality benefits, it helps prevent the "hull bottom phenomenon" and reduces the shift of the product's tip. (I plan to publish a detailed column about the "hull bottom phenomenon" later!) On the other hand, the disadvantages are that single-stroke molds tend to have lower productivity compared to other press molds because they are often operated manually, and they cannot perform complex processes due to having only one step. Single-stroke molds are suitable for processing items with small lot sizes or large-sized products. In the first column, I introduced the "single-stroke mold." In the next column, I will explain the "progressive mold"!

• Technical and Reference Books

Traditionally, we conducted accuracy inspections using non-contact measuring devices, but we have introduced a method that uses the same inspection approach as our customers to provide greater peace of mind. We support contact inspections, including parts for automotive molds. Since we can also perform trace measurements, you can trust us with the guarantee of high-precision small parts (such as punches, dies, and forged parts). This will contribute to further ensuring accuracy and reducing the labor involved in acceptance inspections. 【Overview】 ■ Manufacturer: Mitutoyo Corporation ■ Machine Type: CNC Coordinate Measuring Machine ■ Model: STRATO-Apex7106 ■ Axis Travel: x700 y800 ■ Introduction Date: April 2022 *For more details, please refer to the PDF document or feel free to contact us.

• 3D measuring device

We would like to introduce a case where a manufacturer of automotive parts solved their challenges by introducing a new machining center and wire electrical discharge machine. The manufacturer was struggling with the inability to produce high-precision products despite creating punches and dies through three-dimensional processing to accommodate the miniaturization and complex shapes of products. They faced issues not only with defects but also with the inability of conventional measuring instruments to adequately measure shapes, making it impossible to guarantee precision. To address this, they ensured shape measurement using a laser microscope, which could measure shapes that conventional contact-type tracers could not. 【Overview】 ■ Customer's Industry: Automotive parts manufacturing ■ Processing Technology: Parts processing with a precision of ±2μm using a new machining center and wire electrical discharge machine ■ Quality Assurance: Implementation of three-dimensional measuring instruments (from Mitutoyo, OGP, TESA) and a laser microscope (from KEYENCE) to guarantee shape measurement in the sub-micron order. *For more details, please refer to the PDF document or feel free to contact us.

• Mold Design

At Nagumo Manufacturing, we prevent scrap accumulation and improve productivity by setting appropriate clearances, ensuring machining accuracy, and utilizing adjustment techniques to reduce downtime. We addressed the challenges faced by automotive parts manufacturers struggling with frequent downtime due to scrap accumulation. Our company implemented measures against scrap accumulation for these manufacturers. The average occurrence of scrap accumulation, which was happening 9 times a day, was improved to 0, resulting in a reduction in downtime and a significant increase in factory productivity. 【Overview】 ■ Customer Industry: Automotive parts manufacturing ■ Consultation Details: Frequent scrap accumulation during press processing, causing machine stoppages and inefficiency ■ Proposed Solution: Recommendations for appropriate clearance and changes in part shape ■ Technology Used: Introduction of a new processing machine for part machining with ±2μm accuracy ■ Results: Increased productivity *For more details, please refer to the PDF document or feel free to contact us.

• Mold Design
• Press Dies

With our dedicated molds, we change tomorrow." Every product from Nagumo Manufacturing is custom-made! Do you have any issues with precision mold component processing or precision mold design? Our company has many facilities in place, allowing us to propose solutions from the customer's perspective for the problems you consult us about. This time, we would like to introduce the scale of our factory, our equipment, and our qualifications by releasing a video that allows you to virtually tour our company. You can view everything from the entire factory to key equipment, processing sites, and inspection rooms in 360 degrees. Additionally, we will be exhibiting at a trade show in October. If you visit, please stop by our booth! *For details, please check the 'Basic Information' section below. [Video Content] - Opening - Overview of the entire factory - Introduction of various equipment (machining centers, grinding machines, etc.) - Mold assembly and manual finishing - Introduction of the mold design room, technical department, inspection room, and production management room - Other facility introductions We are also offering downloadable materials such as "Precision Mold Design and Manufacturing / Component Processing Examples" and "Equipment Documentation." *For more details, feel free to check the "PDF Download.

• Mold Design

At Nagumo Manufacturing Co., Ltd., we have introduced a "High-Precision Image Dimension Measuring Device." This device combines a tool microscope and a CNC image measuring instrument, allowing anyone to easily perform high-precision measurements. It excels at measuring press samples and items that require repeated measurements, enabling stable measurements without the need for the operator's skill or complex settings typically required for 3D measuring instruments. Currently, we are receiving numerous inquiries for molds, and we have implemented this device to shorten the lead time for sample measurements. It is expected to measure in half the time of the conventional method. 【Inspection Device Information】 ■ Manufacturer: Keyence Corporation ■ Machine Type: High-Precision Image Dimension Measuring Device ■ Model: LM-1000/1100 ■ Axis Movement: x200 y100 ■ Repeatability: ±0.1–0.9μm ■ Measurement Accuracy: 0.7μm and above ■ Introduction Date: September 2021 *For more details, please refer to the PDF document or feel free to contact us.

• Other measurement, recording and measuring instruments

Nagumo Manufacturing Co., Ltd. has introduced a "High-Precision Wire Electrical Discharge Machine." It is one of the largest sizes among the wire electrical discharge machines made by Seibu Electric. The processing fluid is water-based, and it uses φ0.2 wire. We specialize in plate processing for molds, achieving a pitch accuracy of 0.001mm or better with the high machine precision characteristic of Seibu Electric and temperature control similar to that of a constant temperature room. 【Machine Information】 ■ Manufacturer: Seibu Electric Co., Ltd. ■ Machine Type: High-Precision Wire Electrical Discharge Machine ■ Model: SuperMM80B ■ Axis Movement: x800 y600 z230 ■ Installation Date: August 2021 *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

Nagumo Manufacturing Co., Ltd. has introduced a "Ultra-Precision Forming Grinding Machine." With a highly rigid column head and a finely adjusted sliding surface, the flatness accuracy has significantly improved. Additionally, by utilizing the automatic grinding wheel shaping function, the operational efficiency of the factory has increased, allowing us to better meet our customers' delivery requests. The introduction of this equipment has expanded our lineup of ultra-high precision machining for large plates, including groove processing and step processing, achieving precision of 0.001mm and beyond. 【Machining Equipment Information】 ■ Manufacturer: Nagashima Seiko Co., Ltd. ■ Machine Type: Ultra-Precision Forming Grinding Machine ■ Model: NSE840-NC ■ Axis Travel: x700 y400 ■ Introduction Date: June 2021 *For more details, please refer to the PDF document or feel free to contact us.

• Grinding Machine

This document introduces examples of precision mold design and manufacturing, as well as parts processing conducted by Nagumo Seisakusho Co., Ltd. It includes numerous case studies that address challenges such as reducing maintenance time in precision mold design and manufacturing, and improving the lifespan of carbide punches in precision mold parts processing. Additionally, we introduce the "high-precision profile grinding machine" and "high-precision vertical machining center," among other introduced processing machines. If you are interested in the processing details or would like to discuss estimates, please feel free to contact us. [Contents] - Introduction of introduced processing machines - Case studies addressing challenges in precision mold design and manufacturing - Case studies addressing challenges in precision mold parts processing *For more details, please refer to the PDF document or feel free to contact us.*

• Mold Design

A customer in the automotive parts manufacturing sector was facing the challenge of wanting to increase press rotation speed to improve productivity. In response, we proposed solutions for enhancing the precision of the parts and improving alignment accuracy. Through new high-speed milling processes and our unique wire electrical discharge machining technology, we achieved mold dimension and alignment accuracy of 0.003mm. Additionally, the introduction of high-precision molds allowed for increased rotation speeds while maintaining stable quality. 【Case Study】 ■ Customer Industry: Automotive Parts Manufacturing ■ Inquiry: Desire to increase press rotation speed to improve productivity ■ Proposed Solutions: Enhancing part precision and improving alignment accuracy ■ Technologies Used: High-precision part machining and mold alignment technology ■ Results: Increased productivity *For more details, please refer to the PDF document or feel free to contact us.

• Mold Design

The customer, a film processing manufacturer, faced issues where the condition of the products changed with each mold maintenance, affecting quality, and it took time to adjust the molds. In response, we proposed solutions such as high precision of parts and high precision in alignment. With our high precision processing and assembly adjustment technology, we achieved highly reproducible molds, leading to reduced maintenance time and improved product quality, resulting in cost reduction. 【Case Study】 ■ Customer Industry: Film Processing Manufacturer ■ Consultation Details: - The condition of the products changes with each mold maintenance, affecting quality - It takes time to adjust the molds ■ Proposed Solutions: High precision of parts and high precision in alignment ■ Technologies Used: High precision parts processing and mold alignment technology ■ Results: - Improved product quality - Reduced mold adjustment time *For more details, please refer to the PDF document or feel free to contact us.

• Mold Design

At Nagumo Manufacturing Co., Ltd., we have introduced a "High-Precision Vertical Machining Center." The high-rigidity spindle (BBT40) can handle everything from high-speed rough machining to precision finishing. Additionally, it features a dual-face APC (Automatic Pallet Changer), making it highly productive. 【Machining Machine Information】 ■ Manufacturer: DMG Mori Seiki ■ Machine Type: High-Precision Vertical Machining Center ■ Model: NVX5080 ■ Axis Travel: x800 y530 z510 ■ Introduction Date: December 2020 *For more details, please refer to the PDF document or feel free to contact us.

• Machining Center

We record the finished dimensions of all parts in our company. Therefore, when you place an order for replacement parts, we manufacture them with a tolerance of ±1μm compared to the original parts. By simply replacing the parts, we can restore them to a condition identical to new, significantly reducing the time required for setup adjustments after part replacement. 【Case Overview】 ■ Customer Industry: Electronic Components Manufacturer ■ Inquiry: Want to reduce the time required for punch and die nesting replacement ■ Proposed Solution: Change the positioning method of the punch and die ■ Technology Used: Changed the die nesting keying method to a light press-fit method ■ Results: No adjustments needed after nesting replacement, reducing replacement time by 75% *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

When extracting thin products, it is necessary to set a significantly narrow punch-die clearance, but it is difficult to reliably achieve the specified clearance in tolerance design. However, our company designs components from the planning stage to realize narrow clearances, so we can custom-manufacture both fabricated and purchased parts. As a result, we can produce molds that meet the required specifications for the products our customers seek. 【Case Summary】 ■ Customer's Industry: Electronic Component Manufacturer ■ Inquiry: Desire to cut thin products sharply ■ Proposed Solution: Ultra-small clearance punching die ■ Technology Used: Improvement of mold structure and component precision ■ Outcome: Eliminated burrs that could not be resolved previously *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

A consultation was received from an automotive parts manufacturer, stating that they were unable to punch out fiber materials with molds from other companies, resulting in poor productivity, and they wanted to process with our molds. In response, we proposed a minimal clearance of 0.003mm and improvements in mold structure and part accuracy. As a result, we were able to punch out the Vectran fiber material (t=0.05mm) due to the difference in clearance. 【Case Summary】 ■ Customer Industry: Automotive Parts Manufacturer ■ Consultation Content: Unable to punch out fiber materials with molds from other companies ■ Proposed Solution: Minimal clearance of 0.003mm ■ Technology Used: Improvements in mold structure and part accuracy *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

When processing superhard materials with electrical discharge machining, microcracks due to thermal effects occur during the machining process. These cracks penetrate to a depth of about 20μm, so no matter how much you polish to achieve a smooth surface, they will remain. These cracks can cause wear in applications such as punches that are subjected to strong loads. In contrast, milling does not produce any microcracks at all. Milling tools can go down to R0.1, and the flexibility of the machining shapes is very high. [Case Overview] ■ Customer Industry: Precision Electronic Components Manufacturer ■ Consultation Content: Want to improve the lifespan of superhard riveting punches ■ Proposed Solution: Transition from electrical discharge machining to milling ■ Technology Used: Milling technology for superhard materials ■ Results: The lifespan of the punches increased threefold *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

We received a consultation from a precision parts manufacturing company regarding the time it takes to adjust when replacing carbide punches. In response, we suggested converting the processing method from electrical discharge machining to milling. As a result, we were able to reduce the adjustment time during punch replacement to one-third. 【Case Overview】 ■ Customer Industry: Precision Parts Manufacturing ■ Consultation Content: Time-consuming adjustments when replacing carbide punches ■ Proposed Solution: Conversion of processing method from electrical discharge machining to milling ■ Technology Used: Milling technology for carbide materials ■ Outcome: Reduced adjustment time during punch replacement to one-third *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

A request was received from an automotive parts manufacturer to process a corner radius of R0.05 with high precision. In response, we proposed oil-cut wire electrical discharge machining. As a result, we were able to achieve the shape processing accuracy and surface roughness required by the customer, reducing the expected timeframe for the job from over a year to just six months. 【Case Summary】 ■ Customer Industry: Automotive Parts Manufacturer ■ Inquiry: Request for high-precision processing of a corner radius of R0.05 ■ Proposed Solution: Oil-cut wire electrical discharge machining ■ Technology Used: High-precision wire electrical discharge machining technology ■ Outcome: Achieved the shape processing accuracy and surface roughness required by the customer *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

Our processing technology enables us to achieve a component and alignment accuracy of ±0.002mm. With the introduction of high-precision components, the positioning accuracy during mold assembly is high, resulting in less wear and reduced component consumption. In the automotive parts manufacturing sector, our processing technology has achieved a component and alignment accuracy of ±0.002mm, leading to increased component lifespan. 【Case Overview】 ■ Customer Industry: Automotive Parts Manufacturer ■ Consultation Details: Short mold maintenance cycle and short component lifespan ■ Proposed Solution: High precision of components and high precision of alignment ■ Technology Used: High-precision component processing and mold alignment technology ■ Results: Increased component lifespan and a 25% reduction in component purchasing costs *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

We would like to introduce the processing machine "High Precision Profile Grinding Machine / CAM Image Type Profile Grinding Machine" introduced by Nagumo Manufacturing Co., Ltd. The "High Precision Profile Grinding Machine" adopts a linear motor for the lifting axis, achieving smooth and highly responsive processing. The "CAM Image Type Profile Grinding Machine" is equipped with a zoom-type high-magnification CCD camera with 80x, 125x, 250x, and 500x magnification. At 500x, it is possible to position and measure the accuracy of the workpiece with an accuracy of 0.5 microns. 【Features of the High Precision Profile Grinding Machine】 ■ Adoption of a linear motor for the lifting axis ■ Achieves smooth and highly responsive processing ■ Equipped with a new type of LED transmission lighting as standard, making the projected image very clear ■ Capable of wide-ranging and high-precision contour grinding *For more details, please refer to the PDF document or feel free to contact us.

• Grinding Machine

● There is a request for cost reduction from the end user. ● I want to modify the mold, but the mold manufacturer is not willing to consult with me. ● I don't know if the mold I'm currently using can be improved. ...To those in charge who have such concerns: ◎ Based on our experience of producing over 10,000 molds, we will propose ways to further reduce costs. ◎ We will think together with our customers and improve the mold to meet their needs. ◎ Our high-precision mold processing technology will enhance the lifespan of the molds.

• Other processing machines

● The product has significant burrs and warping, making post-processing difficult. ● There are many dimensional deviations, making sorting challenging. ● Every time the mold is maintained, adjustments are required, which is troublesome. ... To those in charge who have such concerns: ◎ We improve mold precision with machining technology of ±0.002mm. ◎ When mold precision increases, burrs, warping, and dimensional deviations are improved. ◎ When mold precision increases, reproducibility after maintenance improves, allowing for a reduction in adjustment time.

• Other processing machines

● We can press, but we don't have a team to create molds in-house. ● The capacity of the mold shop we currently work with is insufficient. ● They won't make molds unless it's for mass production. ...To those in charge who have such concerns: ◎ Our company specializes in selling molds. We do not engage in mass production at all. ◎ We own a trial press machine, so sample evaluation is possible. ◎ With 110 employees, our capacity is reliable.

• Other processing machines

● The mold supplier we have been dealing with has withdrawn from business, and we can no longer obtain molds. ● To avoid risk, we would like to shift from purchasing from one company to two companies. ● We would also like to try other mold manufacturers. ...To those in charge who have such concerns: ◎ For press molds, we can accommodate both "design and manufacturing by our company" and "manufacturing based on provided drawings." ◎ As a mold supplier, we provide molds that reduce the burden on our customers.

• Press Dies

● The current mold shop is concerning due to the absence of a successor. ● I am looking for a mold shop with well-equipped facilities. ● I am searching for a mold shop with designers who can provide various consultations. To those in charge who have such concerns: ◎ We are celebrating our 73rd year since establishment and aim to become a 100-year company. ◎ We update our processing machines and measuring instruments with an annual investment of 100 million yen. ◎ Designers in our technical department will work closely with customers to solve problems.

• Press Dies

We have introduced a large number of machine tools. With our outstanding processing technology, we can accommodate various shapes. We deliver high-precision parts from just one drawing. 【Service Contents】 - Processing of replacement parts for molds (tolerance ±0.001mm and above) - Processing of parts for jigs and devices - High-hardness cutting processing of cemented carbide and hardened steel (tools from φ0.1mm) - Mirror surface grinding (Ra0.2μm and above) - Fine wire electrical discharge machining (wire diameter φ0.05mm and above) *For more details, please download our catalog or feel free to contact us.

• Processing Contract

We design and manufacture molds with a level of dimensional tolerance beyond imagination, focusing on quality. With our technical skills and problem-solving abilities, we deliver value that exceeds expectations. We can handle everything from design to production to trial runs in-house. 【Service Details】 - Basic mold sizes under 500mm (for sizes exceeding 500mm, please consult separately) - Molds for fine connectors - Lead frame tie bar cut molds - Various film cutting molds - Motor core molds *For more details, please download our catalog or feel free to contact us.

• Other machine tools

The products of Nagumo Manufacturing are all made to order. Our technical department takes the lead in conducting experiments and investigations in response to the issues raised by our customers. Based on the information obtained from this, we carry out prototypes and trials, allowing us to make proposals from the customer's perspective. Additionally, we aim to transform our customers' "impossibilities" into "possibilities" by utilizing the know-how accumulated from such information to solve their problems. 【Business Content】 ■ Lead frame molds (design and manufacturing) ■ Trim & forming molds (design and manufacturing) ■ Insert mold molds (design molds), various molds (design and manufacturing) ■ Ultra-hard alloy high-precision cutting processing ■ Processing of various parts and components, special pressing processing *For more details, please download the catalog or feel free to contact us.

• Other machine tools