三宮製作所 List of Products and Services

We would like to introduce a case study regarding the measures taken to address jetting issues in small lot PC injection molded products made with our simple molds. Due to the close proximity from the side gate to the product, there were visible defects caused by jetting. As a countermeasure, we reduced the speed in the molding conditions and increased the mold temperature to make the jetting less noticeable. In addition to these measures, we also restricted the flow of resin with a core pin to allow it to spread in a fan shape, which helped mitigate the jetting issue. [Features] - Injection molded products of small lot PC using simple molds - Restriction of resin flow with a core pin to achieve a fan-shaped spread *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

We would like to introduce the lever boot made from the prototype mold we created, which is an elastomer molded product. The gas venting is primarily done through air vents and core splits, as well as pins. However, there were tendencies for gas burn and short shots at T0, making the molding conditions strict, so we modified the mold. Depending on the shape, various know-how is required not only for elastomers but also for prototype molded products. 【Product Overview】 ■ Material: Elastomer ■ Product: Prototype molded lever boot *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract

We would like to introduce the prototype molded product of the internal screw removal spacer, created using the prototype mold manufactured by our company. For the development product, we received a request for molding with pellet material. While we have molds for dumbbell test specimens, we decided to create a prototype mold due to the preference for screw shapes. It was necessary to experiment with various mold temperatures under molding conditions, and we raised the mold temperature to a maximum of 160°C. The material provided various learning experiences, including unexpected variations that differed from the anticipated trends. 【Product Overview】 ■ Material: Pellet ■ Product: Prototype molded product of the internal screw removal spacer *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract
• Other molds

**Benefits of Biodegradable Plastic with Biodegradation Promoting Additive [Eco Plus]** - No residual microplastics - Raw material costs increase by approximately 40 yen/kg with a 1% addition, making it realistic - The most affordable biodegradable plastic (estimated at 300-400 yen/kg) - Quality is the same as that of original petroleum-based plastics (heat resistance, impact resistance, shelf life, etc.) - Can be recycled without issues using original petroleum-based plastics - Products manufactured with more than 1% of the biodegradation promoting additive [Eco Plus] can obtain various evidence regarding biodegradability (ISO 15985 ATSM 5511) The above introduces the 'biodegradable plastic' handled by Sannomiya Seisakusho, which utilizes the biodegradable promoting additive [Eco Plus]. Decomposition occurs through enzymes secreted by microorganisms. Furthermore, the quality remains the same as that of the original petroleum-based plastics. *For more details, please refer to the PDF document or feel free to contact us.*

• others

For anything related to resin molds, we provide a comprehensive service from small-lot cassette molds and prototype molds to mass production molds, and we can also accommodate injection molded products if desired. We deliver resin products, rubber substitutes, elastomers, and more quickly in the quantities you need. Depending on the material, shape, and quantity, we will propose the most suitable method, such as resin cutting or 3D printing. Please feel free to contact us.

• Resin mold
• Plastic Mould
• Prototype Services

With 60 years of experience, we are dedicated to leveraging the technology and know-how accumulated over the years, centered around plastic molds, while incorporating the latest equipment and cutting-edge mold design software/CAD/CAM, striving to make the most of both new and old strengths. Our company integrates TopMold, the world's fastest mold design software, with TopCam, which does not require intermediate data, aiming to deliver "the optimal product in the fastest time." Although our company is not large, we pride ourselves on providing "sincere and meticulous responses" to any small requests from our customers. Additionally, at Sannomiya Seisakusho, we focus on handling many new and developed products, ensuring thorough data management and security measures for our customers. The product image shows a mold for plastic forming made of recycled plastic PP and glass wool.

• Plastic Mould
• Resin mold
• Injection Molding Machine

Our simple molds are original cassette-type molds that offer short delivery times and low prices. Prototyped injection molded products can be produced in minimum lots starting from just one piece. We are working with the fastest mold design software in the world, TopMold, and integrating it with TopCam, which does not require intermediate data, to achieve "the optimal product in the fastest time." For the current project, the prototype molded product made from polyester-based elastomer will be sampled within 7 days after the order is placed. We can also accommodate production molds and production lots. The transition from simple molds to production molds is consistently smooth. Supported materials include ABS, AS, PP, PE, PS, PET, PMMA, PA, PC, POM, PBT, PPE, PPS, PVC, elastomers, PLA, recycled plastics, and others. Since our company is not very large, we pride ourselves on providing "sincere and meticulous support" for any small requests from our customers. Please feel free to contact us at info@san-ss.co.jp.

• Resin mold
• Plastic Mould
• Other cable related products

Our prototype molds are original cassette-type molds that offer short lead times and low prices. The minimum lot for prototype injection molded products is possible from just one piece. We have linked TopCam, which does not require intermediate data, with TopMold, the world's fastest mold design software, and we are committed to "the optimal product at the fastest speed." The prototype molded product of PBT-GF 20% for this project will be sampled within 5 days after order confirmation. I believe this is one of the fastest in the industry. We can also accommodate mass production molds and production lots. The transition from prototype molds to mass production molds is consistently smooth. Supported materials: ABS, AS, PP, PE, PS, PET, PMMA, PA, PC, POM, PBT, PPE, PPS, PVC, elastomers, PLA, recycled plastics, and others. Since our company is not very large, we pride ourselves on providing "detailed and sincere responses" to any small requests from our customers. Please feel free to contact us at info@san-ss.co.jp.

• Plastic Mould
• Resin mold
• Prototype Services

Production of original dedicated cassette molds, prototype molds, and simple molds. We can also accommodate injection molded products. We can handle a wide range of plastic molded products, from automotive parts and home appliance parts to precision machinery parts and miscellaneous goods. We offer short lead times and low-cost solutions that overturn the conventional wisdom of plastic molds. 【Features】 ■ Significant reduction in lead time (sample delivery as fast as 5 days) ■ Reduction in mold costs (starting from 160,000 yen) *For more details, please download the PDF or feel free to contact us.

• Mold Design
• Plastic Mould
• Processing Contract