中越製作所 Product Lineup

【Service Content】 "Metal is heavy and rusts," "Glass can break," "Rotational molding has slow production"… Are you feeling the limitations of existing methods and materials? At Nakagoshi Manufacturing, we propose a transition to "blow molding (resinization)" from various materials and methods, achieving overwhelming cost reduction and quality improvement! ■ Overwhelming Benefits of Blow Molding 1. Transition from metal: Up to 80% weight reduction! It does not rust and can be washed with water. It is also effective against metal theft. 2. Transition from wood: Improved water resistance and a wide variety of color options! 3. Transition from glass: Dramatically improved safety with reduced breakability! 4. Transition from rotational molding: Dramatically shortened molding cycles, enabling mass production!

• Product Development
• Contract manufacturing
• Technology Development

"Isn't there a way to make this task easier and more efficient...? I want a dedicated tool, but I don't know where to order it..." For such "small concerns" on the shop floor, leave it to Nakagoshi Manufacturing's simple jigs! ■ Our strengths in jig design and manufacturing 1. Utilizing know-how of complex sliding mechanisms: We fully leverage the advanced sliding mechanism expertise developed through the design of 3D blow molds to avoid interference in jig design! We propose user-friendly jigs that prioritize usability. 2. Complete one-stop service: From jig design to procurement of mechanical parts, processing, and assembly, we handle everything in-house consistently. 3. Customization tailored to the site: We thoroughly listen to our customers' actual work processes, such as processing, inspection, and correction, and bring original jigs to life that enhance precision and quality! Please feel free to consult us for ideas on improving work efficiency!

• Assembly Jig
• Mechanical Design
• Contract manufacturing

"We had the mold made, but finding a company to do the molding is a hassle..." "I don't have knowledge of blow molding, so I'm worried about aligning the specifications..." If you have such concerns, Nakajo Manufacturing will solve them all! We handle everything from mold design and manufacturing to blow molding, utilizing our unique network to arrange the optimal molding manufacturer! ■ Strengths of Our Comprehensive Service 1. Hassle-free outsourcing: Just provide us with the product drawings! We will take care of the tedious search for molding companies and the specialized specification alignment for you! 2. Technical proposals from blow mold experts: You can rest assured even if you lack expertise in molding. As specialists in molds, we will propose "integrated parts" and "shapes that prevent molding defects" from the initial stages to enhance product quality. 3. Proposals for transitioning from other methods: We have numerous achievements in cost reduction through replacements from processes like injection molding! If you are a design or procurement officer struggling with "I don't know where to ask...", please consult with our blow mold experts first!

• Contract manufacturing
• Resin mold
• Product Development

Do you have any concerns at the site, such as 'the mold was placed on our molding machine, but the clamp doesn't fit' or 'we can't mold properly, and defects are occurring'? At Nakajo Seisakusho, we provide a service to optimally adjust and transfer molds to ensure they can achieve the best performance based on the characteristics of the blow molding machines you have (size, clamp, opening and closing pressure, etc.)! ■ Strengths of our transfer and adjustment service - Customization based on the molding machine: Even if the molding machine and mold are mismatched, we adjust the mold side to function properly, establishing a reliable mass production system. - One-stop production of mold accessories: We can design and manufacture parts associated with the mold, such as joints and positioning blocks. We leverage advanced design capabilities to avoid interference with slides and other components. - Comprehensive support after installation: We provide prompt mold adjustments during troubles such as 'we can't mold properly' and offer consistent support for long-term maintenance and repairs. Leave the 'troubles' of the molding site to a specialized manufacturer of blow molds!

• Resin mold
• Processing Contract
• Mold Design

"Can this design be made with blow molding?" "I want to somehow reduce the mold costs..." For designers facing these concerns, at Nakakoshi Seisakusho, by consulting with us during the idea stage or before design approval, we can assess the feasibility of blow molding and propose shape optimization (VA/VE) that directly leads to cost reduction! ■ Strengths of our VA/VE proposals - Removal of undercuts: We suggest modifications to the "undercut" areas that hinder release, reducing the need for expensive sliding mechanisms and significantly lowering mold production costs. - Setting draft angles: We appropriately set a "draft angle (around 1 degree)" that promotes smooth release, helping to avoid delays in the molding cycle and risks of defects such as scratches and whitening. - Uniform thickness: We propose adding curvature (R) to extreme deep draws or sharp designs to prevent uneven thickness and punctures. We don't just create according to the drawings; we partner with you to make it "cheaper, lighter, and better." Please consult with us from the early stages of development!

• Product Development
• Mechanical Design
• Analysis Services

【Service Content】 Are you facing issues like "there are no drawings from that time," "the mold manufacturer has gone out of business," or "the mold is too old to use"? At Nakagoshi Seisakusho, we offer "reverse engineering" services that can accurately measure existing product samples or old molds (including those from other companies) using 3D measuring machines, even without drawings, and transform them into 3D data to revive them as the latest blow molds! ■ Our Strengths in Reverse Engineering - Precise Restoration from Physical Objects: We can accurately digitize and manufacture molds from complex-shaped products or old molds. - Compatibility with Screw Shapes: We can reverse-calculate dimensions from items like bottle caps and reproduce perfectly fitting screw threads in the molds. - Realization from Sketches: We can create 3D data from hand-drawn concept sketches (punch drawings) and provide a complete service up to mold manufacturing. - Restoration Plus Improvement Proposals: We offer updates that enhance quality and productivity, such as changes to the latest cooling circuits and shape optimization to eliminate molding defects, rather than just making a simple copy.

• Processing Contract
• Mechanical Design
• Plastic Mould

Are you facing issues such as 'burrs coming from the PL surface,' 'clogged water cooling pipes,' or 'the manufacturer that made your molds has gone out of business and repairs cannot be made'? At Nakagoshi Manufacturing, we flexibly respond to repairs and maintenance not only for our own products but also for those made by other companies, including old blow molding molds from 10 to 20 years ago (ZAS products are also acceptable)! ■ Troubles and Requests We Can Address - Repair of wear on the PL surface, occurrence of burrs, chipping, and cracks - Repair of leaks, clogs, and corrosion in the cooling circuit - Repair of misalignment or breakage of guide pins (we also propose high durability through in-row structure!) - Addressing issues with slide mechanisms and air leaks in cylinders - Modification of molds and changes to engraved text due to product design changes ■ Our Strengths! - Even for mold parts without drawings, our craftsmen can measure dimensions from the actual parts and manufacture or replace new components! Additionally, for old molds that use outdated design methods (such as pool cooling), we propose updates to the latest designs (such as flow circuits) to improve productivity. For any issues with blow molds, please consult our specialized manufacturing company!

• Calibration and repair
• Plastic Mould
• Processing Contract

Are you struggling with the assembly and welding processes of multiple parts in the manufacturing of plastic hollow products? The "integrated parts proposal using special blow molds" from Nakajo Seisakusho will solve that challenge! Typically, components like flanges and nuts are separately manufactured through injection molding and then welded and assembled later. However, with our special blow molds, we can perform "insert molding" by setting metal nuts or other components into the mold before shaping, as well as "complete integrated molding" that includes the flange section. ■ Benefits of Implementation - Significant reduction in costs and labor: The need for post-process assembly and welding work is eliminated, cutting out the costs of dedicated equipment and jigs such as welding machines. - Improved quality and aesthetics: Avoids misalignment and strength reduction from welding, as well as the risk of liquid leakage. Since there are no burrs at the joints, the appearance of the product is also beautifully finished. With our unique mold design know-how utilizing a "slide mechanism," we can accommodate high-difficulty requests such as simultaneously placing multiple insert parts. For design aimed at cost reduction, trust Nakajo Seisakusho!

• Mold Design
• Resin mold
• Mechanical Design

This is a small diameter hose for automobiles (the product shown is approximately φ16). Due to its long and curved shape, the suitable molding method for this product is three-dimensional blow molding. Even with blow molding, it is possible to shape thin hose forms. It can fit into restricted storage spaces. Additionally, there are multi-cavity molds that can produce two products from a single mold for smaller products and those with a short overall length. Currently, in home appliances, efforts are being made to reduce weight and improve costs by converting hoses from metal to resin.

• Plastic Mould

The circular opening can be opened and closed with a three-part sliding mechanism. The main feature is that two plate-like injection-molded parts are installed near the bellows. To achieve this structure, all parts behind the bellows are designed to fit within the slide. This product, which uses a component longer than 300mm for product demolding and also incorporates the insert slide, is composed of a two-stage sliding (parent-child) structure. Therefore, at the manufacturer's request, it has been consolidated into a single component made up of seven parts.

• Plastic Mould

The shape is designed to connect two molded products, allowing for two pieces to be produced with a single mold. After molding, the purple section is cut away, resulting in two molded products. Since two molded products can be created in one cycle, it is suitable for mass production. Additionally, it allows for the integration of injection-molded parts, eliminating the need for post-processing welding work. This is a molded product that takes advantage of the characteristics of three-dimensional blow molding.

• Plastic Mould

Since it is a bumper for automobiles, it requires rigidity, hardness, and performance in high-temperature environments. The material is PP+PE-TD10 (a composite material made by adding 10% talc to a blend of polypropylene and polyethylene), which meets the application requirements. Additionally, talc-reinforced polypropylene is suitable for applications that require lightweight materials.

• Plastic Mould

This is a product where the flange part is integrally molded using only a direct blow molding mold. There is no need to separately manufacture the flange (component) by injection molding and then weld it.

• Plastic Mould

Blow-molded products have a hollow interior. Utilizing that characteristic, boats can float on water. There are many blow-molded toy products readily available.

• Plastic Mould

It is a tank for pesticide spraying that is carried on the back. Two injection-molded parts for shoulder straps and two resin nuts are each inserted. Additionally, the part that holds the pesticide and the part that stores the engine are separated by pressing. The underside of the foot part is designed with a sliding structure across the entire back, allowing the resin to extend to the narrow toe, and it is configured to be molded as a single unit with both a plate-like shape and a blow tank shape.

• Plastic Mould

This is a tank for pesticide spraying mounted on a drone. It incorporates four injection-molded parts and eight flange nuts. The pins supporting the four nuts arranged on the vertical wall perpendicular to the parting line are designed to slide, as they would obstruct the release. Additionally, the screw section (purple) has been machined to fit a cap provided without a drawing.

• Plastic Mould

It has a U-shaped curved form. The center of the product is a "crushed shape" formed by crushing resin within a mold. Therefore, it will be direct blow molding instead of three-dimensional blow molding, which is good at creating curves.

• Plastic Mould

We have created molds for medical beds. You have ordered five types of molds to produce the product shown in the image. The product is thin, but it has many uneven surfaces, so it is important to properly place air escapes in the right spots to ensure it expands well.

• Plastic Mould

This is a pop sign that is active in various locations, both indoors and outdoors. The main body is made of polyethylene, and the panel is composed of shatter-resistant polyethylene terephthalate. It features an excellent design for visibility and durability.

• Plastic Mould

This product can insert nine injection-molded parts using direct blow molding. All inserted components are released by a sliding mechanism. Since the mold is fixed in the vertical direction, it is necessary to carefully secure the inserts to prevent them from falling. Additionally, this product has two types with different shapes from the inclined part to the opening, but the mold is divided so that it can accommodate both types with a single mold, allowing for the production of two types of products by partially replacing the components.

• Plastic Mould

Direct blow molded products. In a single molding process, two types of pipe products that combine the functions of an air duct and a resonator are formed. After molding, they are separated at the central purple section. Even if the shapes are different, it is possible to achieve set taking under certain conditions.

• Plastic Mould

This is a product with a shape resembling a cobra's head, featuring rubber-like injection molded parts and small pipe injection molded parts inserted on the sides. Both insert components have a slide structure that includes a core, which also serves to prevent punctures. Additionally, the bellows shape is designed for a release slide specification. The small opening has a slight undercut relative to the mold split, but since the material is soft, it can be released without difficulty. In this case, if the customer agrees, we can propose a solution that does not use a slide structure to reduce mold costs.

• Plastic Mould

The resonator and duct were integrated and molded into a single part using the same mold, resulting in one component. The insert for the injection-molded product is also included. Normally, two types of molds would be required: one for the resonator and one for the duct. Additionally, a process to fit the two types of parts together would be necessary after molding. However, by integrating the resonator and duct into a single mold, we can reduce mold costs and shorten the work process. This specification is made possible by direct blow molding, significantly reducing costs.

• Plastic Mould

Since it is a fender for automobiles, rigidity, hardness, and performance in high-temperature environments are required. The material is PP + PE-TD10 (a composite material made by adding 10% talc to a blend of polypropylene and polyethylene), which meets the application requirements. Additionally, talc-reinforced polypropylene is suitable for applications where weight reduction is necessary.

• Plastic Mould

These are the seats you sit in when you visit a stadium for events like watching sports. The seats in the audience are mostly made from blow-molded products.

• Plastic Mould

Mold for "side branch type" ducts for automobiles

• Plastic Mould

We have published a lot of information on our operating site "Special Blow Mold Design and Manufacturing.com." Please take a look.

• Machining Center

Our company manufactures molds for plastic (for blow molding). We produce molds for automotive air conditioning components, including air ducts, resonators, guard bars, spoilers, and manifolds. We offer various proposals to meet different needs, including integrated solutions for blow and injection molding. Please feel free to contact us with your requests. 【Examples of processing】 ■ Aluminum molds ■ Steel molds ■ ZAS molds *For more details, please do not hesitate to contact us.

• Resin mold
• Mold Design
• Prototype Services