Injection Molding
RISU Plastic Group's Technology
Injection Molding
Injection molding is a forming method ideal for the mass production of products with complex shapes. We use this technology across a wide range of fields, including logistics materials, industrial components, medical-related products, household goods, commercial-use products, and construction and civil engineering materials.
Molding Cycle
Inside the Mold
Finishing Process
The raw material is melted by electric heating at temperatures ranging from 150°C to 280°C, approximately 320°F to 536°F, and then injected into a metal mold.
After the material cools and solidifies into the desired shape, the mold automatically opens. The molded product is then removed by a robot and placed on a conveyor belt for finishing.
Forming Techniques
The appropriate forming method depends on the functions and performance required of the final product. We use a range of forming techniques to produce products that meet the diverse needs of our customers.
◆Two-Color Forming
Two-color forming is a technique used to mold the same material in two different colors, creating products with distinctive and attractive designs. Unlike painting or hot stamping, it provides durable decoration and a high-quality appearance.
Different-material forming is a technique in which two different materials are bonded together during the molding process, allowing different properties to coexist within a single product.
By reducing or eliminating secondary processes such as bonding or adhesion work, these techniques help lower costs while expanding the range of product applications.
＜Two-Color Forming Products＞
NF Container
＜Product Utilizing Two-Color Core-Back＞
RISU BOX
◆Gas Injection
Gas-injection molding is a technique in which nitrogen gas is injected into thicker sections of the product. This helps reduce weight, improve structural strength, and prevent sagging and warping.
This method is used, for example, to form circular handles for buckets.
◆Press Forming
Press forming is a technique in which resin is introduced into an open mold and spread through the flow channels with minimal pressure.
Because the material can be molded at low pressure, this method helps produce finished products with minimal warping. In addition, the pressing process allows the resin to spread over a longer flow distance than in general injection molding.
As a result, products with larger projected areas can be formed using molding machines with lower clamping force.
Design assistance
Design with 3-D CAD
We conduct product design using 3D CAD. By utilizing CAD data for CAE analysis and 3D printing, we help eliminate design errors and improve development accuracy.
Design validation through CAE
By using structural analysis, we develop lighter designs that meet the required performance standards. In addition, flow analysis helps prevent molding issues after mold production, contributing to improved quality, cost reduction, and shorter lead times.
Shape sharing through 3D printing
By confirming product shapes with physical models, we ensure a shared understanding with customers and accurately incorporate their needs into the final product.