三浦化成工業 List of Products and Services

Miura Kasei Industry is a manufacturer of plastic parts molding and processing. This technical case collection is for those who want to learn more about "two-color (different materials) molding" and "elastomer molding," providing technical knowledge and application examples. ■ I want to know about two-color (different materials) molding and elastomer molding! ■ I want to learn in detail about the mechanism and operation of two-color molding molds… ■ I would like to see examples of two-color molding and elastomer molding! If you are such a person, please take a look. Additionally, we also include information about our equipment and changes in the utilization of two-color molding technology. We contribute to the "high added value of injection molding" and "high added value of our customers' products" through two-color molding and elastomer molding, so please take a look and make use of it. 【Contents (excerpt)】 ■ What is two-color molding? ■ About our equipment ■ Changes in the utilization of two-color molding technology ■ "Application-specific explanations" in the utilization of two-color molding technology - Product application examples list - Tactile/ Cushioning/ Anti-slip, Sealing/ Tightness/ Sealability, Bellows, Hinges - Color separation (design), Thickness molding, Sliding (non-compatible materials), Slipping (water-soluble resin) - Decoration (in-mold molding), etc. * For more details, please refer to the PDF materials or feel free to contact us.

• Plastic Mould

We would like to introduce the features of "Two-color (different materials) molding." By utilizing the characteristics of each different material, it can be molded in one go, eliminating the need for assembly (screwing, welding, adhesion, etc.) and allowing for additional functions. As a result, it enhances reliability and productivity while reducing costs, enabling support for the development of new applications. [Features] ■ Molding can be done in one go by utilizing the characteristics of each different material 　↓ ■ No assembly (screwing, welding, adhesion, etc.) + additional functions 　↓ ■ Improvement in reliability and productivity, as well as cost reduction 　・ Support for the development of new applications *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

We would like to introduce the "equipment" of Miura Kasei Kogyo Co., Ltd. We own a total of 14 two-color molding machines and 8 single-color molding machines, as well as various "mold maintenance equipment" such as surface grinding machines and general-purpose lathes, and numerous "measuring and inspection devices" including measuring microscopes "MM60/MM800." Our company provides high value-added plastic products through two-color molding and the molding of elastomer materials. 【Owned Equipment】 ■ Molding Machines - Two-color molding machines: 14 units - Single-color molding machines: 8 units ■ Mold Maintenance Equipment ■ Measuring and Inspection Devices *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

Our company is a manufacturer of plastic parts molding. On this page, we will introduce the two-color molding technology production case for "sealing/sealability." By performing two-color molding with a soft elastomer resin, we can eliminate the assembly process of sealing material gaskets that was previously done in a separate step. This allows for integrated molding with rigid resin, leading to cost reduction. Furthermore, by reducing processing variations, we can improve productivity and stabilize quality. Additionally, by designing shapes creatively, the flexibility of the elastomer can conform to complex shapes, such as curved surfaces of counterpart parts, filling gaps to achieve waterproof and dustproof properties. [Product Application Examples] ■ Printer ink tank caps ■ Streamlining components for automotive windshields *For more details, please refer to the PDF materials or feel free to contact us.

• Contract manufacturing

Our company is a manufacturer of plastic parts molding and processing. On this page, we will introduce a case study of our two-color molding technology, 'Sliding (Dissimilar Non-Miscible Materials).' This involves the integrated molding of the case and fins of a car air conditioning vent. Traditionally, fins of different sizes were assembled together, but with the combination of non-miscible resins that do not adhere, it has become possible to achieve integrated molding in two colors, leading to significant cost reductions. [Product Application Examples] ■ Car air conditioning vent - This method is also used in other applications, such as the joints of limbs in what is commonly known as Gundam plastic models. *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

We would like to introduce our two-color molding technology case study on "Touch, Cushion, and Anti-Slip." It can be utilized as an alternative to rubber. It is applicable for cushioning and anti-slip purposes, and is often used as a substitute for rubber processing, providing added value in terms of cost and processing. By adding the softness of elastomers to hard, cold, and inorganic resin parts, it offers a cushioning effect similar to rubber, providing a tactile experience that considers the user. Not only does it provide consideration, but depending on its use, it also creates added value such as a sense of security by being slip-resistant and protecting against impacts. 【Product Application Examples】 ■ Digital Camera Grip ■ Shock-Resistant Covers for Precision Instruments *For more details, please refer to the PDF materials or feel free to contact us.

• Contract manufacturing

We would like to introduce our two-color molding technology case study, "Slippery (Water-Soluble Resin)." This is a special resin, and it utilizes a resin that dissolves in water or hot water for two-color molded parts. Similar to the smoother part of a razor, it becomes slippery when water adheres to it. By using water-soluble resin, we can reduce the friction resistance against the skin. Additionally, by creating molded products using a special water-soluble resin that dissolves at temperatures close to the boiling point of 100°C, we can produce molded items with bag-shaped spaces that cannot be machined through secondary processing by soaking them in hot water for a certain period after molding. 【Product Application Examples】 ■ Smoother for razor blade parts ■ Air valve mechanism components *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

We would like to introduce our two-color molding technology case study, "Decoration (In-Mold)." By inserting a film printed with a design inside the mold during the two-color molding process, the film adheres closely to the resin within the mold, allowing for the omission of painting or printing in the secondary process. Additionally, by using a film that has UV (ultraviolet) curing capabilities, we can achieve a surface hardness that is resistant to scratches by irradiating it with UV light after molding. [Product Application Example] ■ Mobile phone exterior panel *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

We would like to introduce our two-color molding technology case study: "Bellows and Hinges." By using rigid resin and elastomer for the opening and closing lid of a console box in a car interior, similar to the bath lid with a bellows structure, we can create a sliding opening and closing lid that functions like a curved shutter. Additionally, by incorporating hinge characteristics into the cap design for various electronic devices such as mobile phones and digital cameras, we can prevent the loss of caps. 【Product Application Examples】 ■ Console Box Opening and Closing Shutter ■ Cover with Hinge Function *For more details, please refer to the PDF materials or feel free to contact us.

• Contract manufacturing

We would like to introduce our two-color molding technology case study on "Color Separation (Design) / Thickness Molding." By using two different resins, we can expand the design possibilities, such as in the dial buttons of home phones, color separation of exterior panels, and illuminated text in vehicle window control switches, among others. Additionally, by performing two-color molding with the same resin, we can achieve molded products with minimal shrinkage and distortion. 【Product Application Examples】 ■ Vehicle Window Control ■ Transparent Thick Acrylic Parts *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

This document introduces some trivia about plastic injection molding (basic edition). It explains the types and characteristics of plastics, as well as what thermoplastic injection molding is. Additionally, it includes a classification of applications for two-color multi-material molding, along with examples and photos. Please take a moment to read it. 【Contents】 ■ Types and characteristics of plastics ■ What is thermoplastic injection molding? ■ Classification of applications for two-color multi-material molding *For more details, please refer to the PDF document or feel free to contact us.

• Mold Design

Thermoplastic injection molding involves important elements such as "heat," which includes melting and cooling the material; "force," which refers to the speed and pressure of injecting the molten material into the mold; and "time," which encompasses the cooling time and productivity (output per hour). The mold is a tool that can produce good products when appropriate molding conditions are applied for manufacturing that product. In injection molding, the mold must have high machining accuracy and be able to easily reflect the molding conditions. [Important Elements of Injection Molding] ■ Heat: Melting and cooling the material (solidifying in the mold) ■ Force: Speed and pressure of injecting the molten material into the mold ■ Time: Cooling time, productivity (output per hour) *For more details, please refer to the PDF materials or feel free to contact us.

• plastic

Here is an example of cost estimation for molded products. (1) Material cost: Component weight + Runner weight @200 to @4,500/Kg (2) Processing cost 　　　1. Molding preparation time × Molding machine rate / Production lot 　　　2. Hourly output / Molding machine rate (@1,200 to @4,000/h) 　　　3. Secondary processing (gate treatment) Hourly output / @1,200/h 　　　4. Inspection cost (Routine inspection, Shipping inspection) Hourly output / @1,200/h (3) Scrap cost: (1) + (2) × ○% (4) Manufacturing cost: (1) + (2) + (3) (5) Management cost: (4) × ○% (6) Profit: (4) × ○% (7) Freight: In-house delivery or Consolidated delivery ¥○○○ per box quantity (8) Packaging cost: Packaging materials cost (box, tray, partition board, plastic bag / per box quantity) Selling price: (4) + (5) + (6) + (7) + (8) Additionally, we also introduce the classification of applications for two-color different material molding. *For more details, please refer to the PDF document or feel free to contact us.*

• plastic

It is said that 80% of the quality and price of molded products is determined by their design. When it comes to the design of molded products, there are often issues such as focusing too much on functionality or pursuing aesthetic beauty to the extent that the shape becomes unfeasible for mold creation, or although the mold can be made, the quality of the molded product remains unstable. In either case, it must be said that the lack of fundamental knowledge in plastic molding, mold design, and molded product design is the cause. 【Features】 ■ Feasibility of mold production and potential for maintaining molded product quality ■ Confirmation of shapes suitable for molds (difficulty of processing and reduction of processing time) ■ Consideration of molded products (productivity and production costs) ■ Necessity of post-processing and secondary processing (to be avoided as much as possible) *For more details, please refer to the PDF document or feel free to contact us.

• plastic

Here are some points to consider when designing a product. Starting with "Where should the parting line (PL/top, bottom, left, right separation line) be placed?", there are also considerations such as "What should the draft angle be?" and "Is it necessary to install ribs?" Additionally, it is important to minimize undercuts (such as side holes or recesses) that could cause interference with the opening and closing direction of the mold. 【Key Points for Product Design (Excerpt)】 ■ Where should the parting line (PL/top, bottom, left, right separation line) be placed? ■ What should the draft angle be? (To facilitate removal from the mold) ■ What is the wall thickness of the main wall? (To ensure strength and rigidity) ⇔ Risk of sink marks and extended cycle time ■ Is it necessary to install ribs? (To provide reinforcement and rigidity) ⇔ The relationship with the main wall is important *For more details, please refer to the PDF document or feel free to contact us.

• plastic

We will introduce the types and characteristics of plastics. There are "thermoplastic plastics," which melt and become fluid again when heat is applied and are flammable, and "thermosetting plastics," which do not melt once they have been set by heat and have self-extinguishing properties and heat resistance. Our company does not perform thermosetting plastic molding, but we can introduce manufacturers that can. 【Characteristics】 ■ Thermoplastic Plastics - Melt ⇒ Flow ⇒ Cool ⇒ Set - Melt and become fluid again when heat is applied, and are flammable. ■ Thermosetting Plastics - Melt ⇒ Flow ⇒ Heat ⇒ Set - Once set by heat, they do not melt and have self-extinguishing properties and heat resistance. *For more details, please refer to the PDF materials or feel free to contact us.

• plastic

Our company is a plastic parts manufacturer that focuses on high added value, responding to customer satisfaction with high quality, short delivery times, cost reduction, and prompt service. We manufacture various plastic parts through injection molding, specializing in two-color molding and elastomer molding, helping to create high added value products. In addition to traditional injection molding, we also review processing materials and molding methods, providing what is known as VA proposals. We address the increasing demands of our customers one by one, such as "wanting to enhance functionality," "considering process consolidation," and "looking to reduce environmental impact compared to current methods." 【Business Activities】 ■ Manufacturing of parts through injection molding ■ Design and production of plastic molds ■ Proposals for reviewing materials and manufacturing processes *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

In recent years, energy-saving and resource-saving measures have been required in manufacturing. Amid this, there is a growing transition to elastomer materials, which are often derived from rubber. These materials are elastic thermoplastics that are environmentally friendly due to their recyclability. They possess flexibility that can withstand repeated deformation and have a texture comparable to rubber. Additionally, they feature a sense of luxury and a pleasant touch, making them one of the materials expected to be applied in various situations as high-value-added components. Our company specializes in molding parts with these elastomer materials, which were previously thought to be impossible, and we excel in combining them with two-color (dual-color, multi-color, different materials) molding. There are various grades of elastomer materials available. Please feel free to contact us. *For more details, please refer to the PDF document or feel free to reach out to us.*

• Processing Contract

Our company is a manufacturer of plastic parts molding and processing. We have particularly achieved a reduction in assembly processes (cost reduction) through two-color (dual-color, multi-color, different materials) molding and multifunctionality using elastomer materials. Products made from elastomer materials enhance luxury and tactile sensations, transforming them into high-value-added products. □ Pattern of combining different plastic materials Notably, this reduces the number of processes compared to traditional methods where assembly was done after molding. By combining different plastic materials during molding, the assembly process becomes unnecessary. □ Pattern utilizing the non-bonding properties of different plastic materials Air conditioning louver parts are a prime example of two-color (dual-color, multi-color, different materials) molding, which takes advantage of the non-bonding nature of different plastic materials. This also achieves a reduction in assembly processes. *For more details, please download the PDF or feel free to contact us.

• Contract manufacturing