Comparison of metal powder injection molding process with other processes

Comparison of metal powder injection molding process with other processes

The particle size of raw powder used for metal powder injection molding is 2~15 μ m. However, the particle size of raw powder in traditional powder metallurgy is mostly 50~100 μ m。 Due to the use of fine powder in the metal powder injection molding process, the density of the finished product is high. Metal powder injection molding technology has the advantages of traditional powder metallurgy technology, but traditional powder metallurgy cannot achieve high degree of shape freedom. Traditional powder metallurgy is constrained by the strength and filling density of the mold, and the mold shape is mostly two-dimensional cylindrical.

Comparison of precision casting

The traditional precision casting drying process is a very effective technology to produce products with complex shapes. In recent years, ceramic cores can be used to complete the finished products with narrow and deep holes. However, due to the restriction of the strength of the ceramic core and the fluidity of the casting fluid, there are still some technical difficulties in this process. Generally speaking, this process is more suitable for large and medium-sized parts, and the process is more suitable for small and complex shape parts. Comparison project manufacturing process traditional powder metallurgy process powder size（ μ m) 2-1550-100 relative density (%) 95-9880-85 product weight (g) ≤ 400g 10-100 product shape three-dimensional complex shape two-dimensional simple shape mechanical properties.

Comparison of die-casting process

Die casting process is applied to aluminum, zinc alloy and other materials with low melting point and good casting fluid fluidity. Due to the constraints of materials, the strength, wear resistance and corrosion resistance of products are constrained in this process. The process can process more raw materials. Although the precision and complexity of precision casting products have improved in recent years, it is still inferior to dewaxing and process. Powder forging is an important progress in large-scale production of connecting rods. But in general, there are still problems in heat treatment cost and die life in forging engineering, which need to be further solved.

Machining comparison

The traditional mechanical processing method has recently improved its processing ability through automation, and has made great progress in effect and accuracy. However, the basic program can not complete the shape of parts without step by step processing (turning, planing, milling, grinding, drilling, polishing, etc.). The machining accuracy of machining method is far better than other machining methods, but due to the low effective utilization of materials, the completion of its shape is constrained by equipment and tools, and some parts can not be completed by machining. On the contrary, materials can be used effectively without restriction. Compared with mechanical processing, the manufacturing of precision parts with small shape and great difficulty has low process cost, high efficiency and strong competitiveness. Technology is not to compete with traditional processing methods, but to make up for the shortcomings of traditional processing methods in technology or production. Technology can exert its advantages in the field of parts processed by traditional processing methods. The technological advantages of process in part manufacturing can form highly complex structural parts.

The injection molding technology is to use the injection molding machine to inject the blank into the product, ensure that the material is fully filled by the mold cavity, and ensure the realization of the high complex structure of the part. In the past, in the traditional processing technology, a single part was first made and then combined into a part. When using the technology, it can be considered to integrate it into a complete single part, greatly reducing the steps and simplifying the processing procedure. Compared with other metal processing methods, the product has higher dimensional accuracy, and requires no secondary processing or only a small amount of finishing.