LSI Product Lineup

LSI Corporation is a group of experts in surface treatment, specializing in mold polishing and mirror polishing. We provide suitable polishing tailored to material properties and usage applications, contributing to improved production efficiency through mirror polishing and precision wrapping that combine our uniquely developed know-how. Our expert polishing techniques extend the lifespan of molds by removing outer burrs and polishing gear radii, tasks that machines cannot perform. Please feel free to contact us when you need our services. 【Features】 ■ Provides suitable polishing tailored to material properties and usage applications ■ Contributes to improved production efficiency through mirror polishing and precision wrapping that combine our uniquely developed know-how ■ Craftsmen polish surfaces by hand, adapting to the characteristics of various steel materials ■ Offers micron-level polishing tailored to the usage applications of each mold ■ Extends the lifespan of molds with precise technical skills from polishing experts *For more details, please refer to the PDF document or feel free to contact us.

We introduce the service overview of LSI Co., Ltd., which supports various processes in mold manufacturing in a one-stop manner. We cater to a wide range of mold production, from cold forging molds to die-cast molds and resin molds. By managing not only the processing but also material selection, heat treatment, and surface treatment (PVD/CVD coating) consistently, we ensure the final required precision of the products. In particular, our strength lies in our total support system, which prevents troubles in later processes by being involved from the proposal stage of processing methods. **Features of LSI:** - Various molds polished to a mirror finish - Polishing methods tailored to each processing type - Specialists in surface treatment - Proposals for processing methods - Total support (component manufacturing) *For details on our total support that realizes the efficiency of mold manufacturing, please refer to the materials.*

We will explain the advantages of advanced hand polishing techniques that challenge the limits of surface roughness and maximize the performance of molds. At LSI Corporation, we combine advanced equipment with skilled artisans to provide overwhelming mirror finishes. Our track record shows that we have achieved an astonishing surface roughness of Ra0.01/Rz0.13 with SKD11 material, which significantly exceeds the precision of conventional polishing machines. The fine adjustments made possible by handwork reduce the coefficient of friction to an extreme level, contributing to a substantial extension of mold life. *Please check the detailed materials for overwhelming mirror appearance and numerical evidence.

Many of the causes of mold failure lie in the surface irregularities. With appropriate surface treatment, we can reduce unexpected issues in the production environment. The main cause of wear in molds is localized pressure that occurs on the fine protrusions of the surface, leading to adhesive wear (seizing). Precision polishing of LSI removes these protrusions, disperses the pressure, and significantly delays the progression of wear. Additionally, by lowering the coefficient of friction, we can prevent sudden issues such as breakage and chipping, supporting stable operation of the production line. 【Wear Countermeasures】 ■ Benefit 1: Reduces localized pressure and delays wear progression ■ Benefit 2: Lowers the coefficient of friction, extending mold lifespan ■ Benefit 3: Reduces unexpected issues such as breakage and chipping *You can download materials summarizing the analysis of wear mechanisms and countermeasure examples.

Finishing of the edge parts, which affects the quality of the mold. Burrs that cannot be removed by machining may lead to product defects. Burrs on the edges that cannot be removed by mirror finishing machines are a major cause of coating peeling and welding issues. The hand polishing technique of LSI utilizes visual inspection and measuring instruments to perfectly shape the outer circumference and the joints of the R parts. Measurement results from the contour tracer also demonstrate that the shape after lapping is dramatically improved, achieving an ideally sharp edge. *Here is the measurement data document where you can check the before-and-after of the edge shape.

Based on actual customer cases, we will introduce how the improvement of surface roughness directly contributed to the reduction of production costs. This is a case where our lapping process (LP) was applied to a bending punch that was struggling with R wear. Before LP, the surface roughness was Rz1.547, and the lifespan was 30,000 shots, whereas after LP, it improved to Rz0.165, and the lifespan extended to 65,000 shots. With just a polishing cost of 25,000 yen, we achieved a high cost performance by reducing the replacement frequency to less than half. *You can check the specific improvement costs and shot count comparison table in the materials.

Unstable tool life hinders planned production. We will explain the benefits of stabilizing surface quality through case studies. In response to the chipping issue of the punch, we implemented thorough lapping processing. By refining the surface from a rough Rz3.116 to a precise Rz0.150, we eliminated material snagging. As a result, the tool life, which was a maximum of 60,000 shots, doubled to 125,000 shots, greatly contributing to stable operations in the production site. *For details on the methods to achieve long tool life for punches, please refer to the case study materials.

We will publish the results of the lifespan comparison test between the coating-only case and the case where polishing is combined with the coating. The unprocessed pierce punch had a lifespan of 17,000 shots, while the coating alone achieved a lifespan of 50,000 shots. However, by adding "polishing," it jumped to 130,000 shots. This test demonstrates that the final lap after coating significantly reduces surface roughness (Rz0.32) and dramatically decreases friction resistance. High-quality surface treatment requires appropriate groundwork and finishing polishing. *Check out the materials packed with astonishing lifespan test data now.

For those concerned about dimensional changes due to polishing processes. At LSI, we can ensure strict dimensional control based on prior consultations. In polishing processes, a reduction in dimensions is unavoidable, but we accurately control that change. For example, while polishing a workpiece with a diameter of φ18.045, we can achieve specified dimensions in microns, such as 18.040 or 18.035, according to customer requirements. We are equipped with advanced CNC 3D measuring instruments and tracers, and we have a comprehensive system in place to guarantee precision after processing. *For details on our high-precision measuring instruments and dimensional control system, please refer to our company profile materials.

Are you struggling with shortened mold life or molding defects? LSI, a group of surface treatment experts, offers optimal solutions. LSI is a team of technicians specializing in mold polishing and mirror finishing. Based on the comprehensive technical skills developed over many years, we achieve longer mold life by providing surface modification that accommodates various materials. We closely support each customer's manufacturing site to significantly enhance production efficiency. **Three Strengths of LSI** ■ Hand polishing of a wide variety of molds ■ Parts sales ■ High-precision inspection *Check out technical materials from surface treatment experts now.*

We provide optimal manual polishing tailored to various mold materials and complex shapes, solving challenges in production environments. Skilled artisans assess the characteristics and intended use of the materials, meticulously polishing each surface by hand. Our unique combination of expertise in mirror finishing and precision wrapping can address details that machine processing cannot reach. With meticulous techniques for deburring and polishing complex gear radii, we significantly enhance the durability of molds. 【Features】 ■ Mirror finish = Improved durability ■ A team of polishing experts ■ Artisan skills that machines cannot replicate *For details on artisan techniques and compatible mold shapes, please click here.

Instead of relying solely on the intuition of craftsmen, we thoroughly manage and guarantee micron-level dimensional accuracy by utilizing advanced measuring equipment. At LSI, we are equipped with high-performance advanced facilities such as three-dimensional measuring machines, contour tracers, and image measuring machines. Products after polishing are rigorously inspected, and surface roughness, angles, and R shapes are all quantified to ensure quality. We deliver peace of mind to our customers by adding "guaranteed value" to "reliable technology." 【Quality Assurance & Total Support】 ■ Quality assurance through precise measurement ■ Consistent proposals from material selection to production *For a comprehensive list of inspection equipment and details on measuring accuracy, click here.

We will introduce a specific example of optimizing the challenging R-section processing in fine blanking through skilled manual work. The delicate connections of the R-section, which were difficult with conventional processing methods, were smoothly finished with precise manual polishing. Compared to before processing, the surface irregularities have dramatically improved, successfully avoiding localized pressure concentration. As a result, we have achieved a significant reduction in the risk of defects such as chipping and breakage of the mold. *Download materials featuring numerous examples of improvements in difficult-to-machine shapes.

This is a successful case where improving the R edge of the bending die dramatically extended the operating time of the production line. Before the improvement, the bending die reached its limit with a shot count of 20,000 to 30,000. We applied a special polishing process to round off the connection of the R section. As a result, the previously sharp areas became smooth, and the shot count improved to 120,000. This is a good example of simultaneously achieving a reduction in regular maintenance costs and an increase in productivity. *Here are the specific processing methods that achieved dramatic lifespan improvement.

We will explain the importance of how differences in surface roughness affect mold life based on comparative data. Compared to the untreated state with only coating (with a lifespan of 17,000 cycles), the one that was polished and then coated recorded an overwhelming lifespan of 130,000 cycles. By polishing the surface roughness to Rz0.32μm, we have successfully suppressed adhesive wear and seizure. Please check the data that supports the importance of "polishing." *Detailed materials on lifespan comparison data by surface roughness are currently being distributed.

This is a total support case where molds that were given up on due to wear and damage are restored through precision welding and advanced polishing techniques. After performing buildup repairs on damaged mold components using precision welding, artisans apply a "welding blend polish" to completely eliminate any height differences with the surrounding areas. Thanks to our unique technology and collaboration with partner companies, we can provide consistent support from material selection to manufacturing and restoration. We offer optimal proposals to reduce disposal costs and effectively utilize assets. *See the detailed flow of mold repair and regeneration services.

LSI is not just a polishing contractor; we are a comprehensive partner that handles everything from material selection to processing, parts sales, and prototype verification. With our well-equipped facilities and machinery, we can flexibly respond to single-item processing of mold parts and the design and production of jigs. Thanks to our unique network, we can provide optimal proposals tailored to the characteristics of a wide variety of steel materials. From prototype analysis and verification to the final surface finishing, we offer a consistent service that resolves issues throughout the entire manufacturing process. 【Three Strengths of LSI】 ■ Hand polishing of a wide variety of molds ■ Parts sales ■ High-precision inspection *Here is the brochure summarizing LSI's business content and equipment list.

We would like to introduce a case where we solved the customer's issue of "unable to manage the dimensions and shape of parts that require surface treatment." In response to the problem of shape distortion and deviation from dimensional tolerances due to LAP and coating, we manufactured the parts including coating from processing. We provided dimensional indications prior to processing and managed dimensions at the micrometer level using our LAP. By incorporating the coating into the dimensions requested by the customer, we achieved longer service life, stabilized production numbers, increased production volume, reduced costs, and decreased the frequency of part replacements. 【Case Summary】 ■ Issue - Unable to manage the dimensions and shape of parts that require surface treatment ■ Proposed Solution - Manufactured parts including coating from processing ■ Results - Increased production volume, reduced costs, decreased frequency of part replacements *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we solved the customer's issue of "poor mold retention." The customer was experiencing problems with early-stage scratches and wear despite coating, leading to poor mold retention and low shot counts. We proposed WPC treatment. As a result, the coating became more resistant to peeling, and scratches decreased, leading to its adoption. The shot count more than doubled, and mold retention improved. 【Case Summary】 ■ Problem - Poor mold retention ■ Proposed Solution - Proposal for WPC treatment and polishing before and after WPC ■ Results of Implementation - Reduction in scratches and wear, shot count more than doubled, and improved mold retention *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we solved a customer's issue regarding "mold lifespan." The customer consulted us about the short lifespan of punches, and we suggested enhancing the polishing before coating. Changing the material or coating carries risks, but since we only modified the polishing, they felt comfortable trying it out. After changing the Rz from around 3 to 0.8, the number of shots increased, product accuracy improved, and costs were reduced. 【Case Summary】 ■ Issue - Mold lifespan ■ Proposed Solution - Enhanced polishing before coating ■ Results - Increased number of shots, improved product accuracy, and reduced costs *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we resolved the issue of "frequent deficiencies in drawings and specification changes leading to rework" that our customer faced. To address the problem of rework causing delays in delivery and additional costs, we proposed pre-support for drawing checks and specification confirmations. With a large number of partner manufacturers and the ability to cover a wide range of fields, we were chosen as an easy-to-consult partner. As a result, rework was significantly reduced, and delivery delays became almost nonexistent. 【Case Overview】 ■ Issue - Frequent deficiencies in drawings and specification changes leading to rework ■ Proposed Solution - Pre-support for drawing checks and specification confirmations ■ Implementation Results - Rework was significantly reduced, and delivery delays became almost nonexistent *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we solved a customer's issue of "tight deadlines that existing partner companies cannot handle." Our company offers a manufacturing system capable of short lead times and urgent responses, along with a one-stop solution utilizing numerous partner manufacturers. After implementation, rework significantly decreased, and delays in delivery became almost nonexistent. Additionally, we became capable of handling sudden projects, which reduced the burden on our internal teams. [Case Overview (Partial)] ■ Problem - Rework is causing delays in delivery and additional costs. - Variability in quality is increasing complaints and the burden of re-inspections. ■ Solution - Proposed changes in processing methods and alternative materials to shorten the process. - Established a system that allows for immediate response in case of defects, addressing issues through corrections rather than re-manufacturing. *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we solved the customer's issue of "having few companies that can respond to urgent requests." Our company offers a manufacturing system capable of short lead times and urgent responses, along with a one-stop solution utilizing numerous partner manufacturers. We have received positive feedback for our continuous improvement proposals, such as cost reduction and lead time shortening, which has enabled us to handle sudden projects and reduce the burden on our internal teams. [Case Overview (Partial)] ■ Issues - Delays and additional costs are occurring due to rework. - The burden of complaints and re-inspections is increasing due to quality variability. ■ Solutions - Utilizing our network of partner manufacturers to select suitable processing locations. - Proposing changes in processing methods and alternative materials to shorten lead times. *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we resolved a customer's issue of "being asked to reduce costs but not being able to come up with improvement proposals." Faced with the problem of not being able to find specific measures for cost reduction, which was putting pressure on profits, we proposed a one-stop solution utilizing processing methods and materials that lead to cost reduction, along with numerous partner manufacturers. As a result, the stability of quality led to shorter inspection times and a decrease in complaints, and we received many positive comments such as "easy to consult" and "quick response." [Case Overview (Partial)] ■ Issue - Being asked to reduce costs but not being able to come up with improvement proposals ■ Proposed Solution - Proposal of processing methods and materials that lead to cost reduction ■ Implementation Results - Stability of quality led to shorter inspection times and a decrease in complaints *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we solved the customer's issue of "difficulty in meeting the surface roughness and shape tolerances specified in the drawings." There are often cases where trying to meet the surface roughness leads to distortion of the shape, and trying to maintain the shape results in failing to meet the surface roughness. In response to this problem, we proposed a method of performing polishing based on the contour measurement values obtained from a three-dimensional measuring machine. With a robust inspection system that allows for accurate measurements and reliable polishing techniques, we were able to implement this solution. As a result, our internal technical capabilities have improved, and we have been able to take on more challenging projects. [Case Overview (Partial)] ■ Issue - Difficulty in meeting the surface roughness and shape tolerances specified in the drawings. ■ Proposed Solution - Suggesting the necessary allowances and roughness for polishing during the work production stage. - If the sales department places a production request, it becomes easier to specify the required allowances and roughness. *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we solved a customer's issues regarding "polishing gear shapes." In response to problems such as lack of polishing staff, not knowing how to polish, taking too long for polishing, and not achieving the required precision and surface roughness, we proposed the necessary tools, equipment, and years of know-how for polishing. Customers appreciated our ability to maintain precision even with short lead times, which has allowed us to receive various polishing projects. 【Case Overview】 ■ Issues - Polishing gear shapes ■ Proposed Solution - A specialized system for polishing is in place ■ Results - We have been able to receive various projects *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we solved our customer's issue of wanting to "extend the lifespan of their molds." In response to the problem of poor mold durability due to friction, wear, and galling, we proposed polishing that maintains the shape and improves surface roughness. By enhancing the adhesion of the coating through polishing, we improved the surface roughness while maintaining the shape, resulting in more than double the number of shots. 【Case Overview】 ■Issue - Wanting to extend the lifespan of molds ■Proposed Solution - Polishing that maintains shape and improves surface roughness ■Results - More than double the number of shots *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we solved a customer's issues regarding "maintenance polishing." In response to problems such as short mold lifespan, high costs for creating new molds, and the inability to perform maintenance polishing in-house, we proposed maintenance polishing after coating removal and a new type of coating film. As a result, requests for maintenance polishing increased, leading to successful cost reductions, and we also received requests for new polishing. 【Case Overview】 ■ Issues - Maintenance polishing ■ Proposed Solutions - Adhesion removal - Restoration of deformed shapes - Improvement of surface roughness *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we solved a customer's problem of "the company they had been requesting processing from has gone out of business." In response to issues such as other companies not matching the same quality and production costs, and the lack of drawings, we proposed to align quality and costs while creating drawings based on our design. By being able to handle items without drawings, we also received inquiries about parts from other departments that lacked drawings. 【Case Overview】 ■Problem - The company they had been requesting processing from has gone out of business. ■Proposed Solution - After multiple meetings, we proposed parts that matched the customer's needs. ■Results - We were able to handle items without drawings. *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case study in which we solved the customer's issue of "not being able to do 3D design." In the design and production of robotic hands, the new model's work shape became complex, making it impossible to address the issue with conventional 2D design. We proposed a concept using a 3D model instead of drawings. By making a speedy decision on the concept, we were able to shorten the lead time to the finished product, and we have since received requests for other projects as well. 【Case Overview】 ■ Issue - Unable to do 3D design ■ Proposed Solution - Provided a 3D model to visually convey the concept and conducted web meetings ■ Implementation Results - Shortened lead time to the finished product due to speedy decision-making on the concept *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we solved our customer's problem of "troublesome process management." In response to the issue of having to manage and arrange delivery dates for each supplier, we proposed a comprehensive management solution from materials to coating by listening to their desired delivery dates and requests. This reduced the time spent on arrangements, allowing them to dedicate more time to other tasks. 【Case Overview】 ■Problem - Troublesome process management ■Proposed Solution - Comprehensive management from materials to coating ■Results - More time available for other tasks *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we solved a customer's issue of "poor service from competitors in single part sales." In response to problems such as slow response speed, limited information retrieval, and sales unable to provide immediate answers regarding price and delivery time, we proposed quicker quotation responses, better proposals, and faster delivery times. As a result, customers who placed an order once continued to place orders and maintained a high priority for their requests. [Case Overview (Partial)] ■Issue - Poor service from competitors in single part sales ■Proposed Solution - Quotation within 24 hours ■Implementation Result - Customers who placed an order once continued to order and maintained a high priority for their requests. *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we solved a customer's issue of "not being able to meet the surface roughness specified in the drawings." In machining, we were unable to meet the required surface roughness, and there was also the problem of not having skilled technicians for polishing. We proposed a fully manual polishing process using specialized tools and equipment. The quality, standards, and speed of delivery exceeded the specifications that could not be met through machining, and the customer was satisfied. 【Case Overview】 ■Issue - Unable to meet the surface roughness specified in the drawings ■Proposed Solution - Fully manual polishing using specialized tools and equipment ■Results - We were able to quickly propose a solution, leading to an increase in polishing requests. *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we resolved a customer's issue of "production being at risk of stopping due to the damage of mold components." By fully utilizing our network, we simultaneously produced a temporary solution using pre-hardened steel and the regular material. As a result, we were able to replace the damaged parts without halting production. 【Case Overview】 ■ Issue - Production was at risk of stopping due to damage to mold components. ■ Proposed Solution - Simultaneous production of a temporary solution using pre-hardened steel and the regular material. ■ Outcome - We were able to replace the damaged parts without stopping production. *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we solved a customer's issue of "unable to strip the coating from carbide" at our company. In response to the problem of having to discard items after a single use, we proposed a method to remove the coating through polishing. This has made reprocessing possible and has helped reduce the costs of new production. 【Case Overview】 ■Issue - Unable to strip the coating from carbide ■Proposed Solution - Remove the coating through polishing ■Results - Reduced costs of new production *For more details, please download the PDF or feel free to contact us.

Here is a case study of proposing a material change from iron with plating to SUS (stainless steel). The customer's drawing specified a process involving SS400 or S45C with plating, but there was an urgent need for production. By suggesting SUS (stainless steel), we were able to eliminate the plating process and achieve a shorter delivery time. The customer appreciated the proposal for a quicker solution based on the drawings. 【Case Overview】 ■ Issue: Urgent need for production ■ Challenge: The drawing specified iron (SS400, S45C) with plating ■ Solution: Proposed SUS (stainless steel) to eliminate the plating process ■ Result: Achieved a shorter delivery time *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we proposed a material change from SUS (stainless steel) to iron + plating based on the drawings. The customer had a request to lower costs. Since iron + plating can reduce costs, we proposed the material change, which also brought the advantage of easier processing. We have received feedback that it is easier to consult about improvement proposals because we can present cost options along with responses according to the drawings. 【Case Overview】 ■ Issue: Desire to lower costs ■ Challenge: The drawings were for SUS (stainless steel) ■ Solution: Proposed iron + plating ■ Implementation Effect: Achieved cost reduction and easier processing *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we proposed surface treatments tailored to the needs of customers struggling with product release. The customer was having trouble with product release and requested a treatment to make it easier to peel off the product. In response, our company suggested multiple surface treatments rather than just one. We have received feedback that a treatment was found that improved the release. 【Case Overview】 ■ Issue: Unsure which surface treatment would be effective ■ Challenge: Struggling with product release ■ Solution: Proposed surface treatments according to the purpose ■ Deciding Factor for Implementation: Received two or three proposals instead of just one ■ Implementation Effect: Found a treatment that improved release *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case study that addresses the challenge faced by customers who are confused about which surface treatment manufacturer to choose due to the overwhelming variety of options available. Customers were using a certain type of film without a clear understanding of why. We inquired about their current usage and proposed similar film types from various manufacturers based on QCD (Quality, Cost, Delivery). They evaluated our ease of use and reported an extension of lifespan compared to the conventional films. 【Case Overview】 ■ Problem: Too many types of surface treatment manufacturers to choose from ■ Challenge: Using a conventional film type without a clear reason ■ Solution: Inquired about current usage and proposed suitable film types ■ Summary of the solution: Proposed similar film types from various manufacturers based on QCD ■ Key factor for adoption: Our ease of use ■ Result: Achieved a longer lifespan compared to conventional films *For more details, please download the PDF or feel free to contact us.