With rapid development of electronics, telecommunications, medical, automotive and other industries, requirements for high precision and performance of plastic products are increasing day by day. Precision injection molding requires not only high dimensional accuracy, low warpage, but also excellent optical properties. Injection moulding is one of the most important plastic molding methods. How to improve level of injection moulding technology, produce high-precision plastic products, and create high value-added products. Injection mold design is an important link.
Cracking, including filament cracks on the surface of part, microcracking, whitening, cracking, and damage caused by sticking of part, sticking of flow path. Cracking is divided into split cracking and application cracking according to cracking time.. There are mainly following reasons:
Introduction: Material forming method is an important part of part design, and it is also a problem that manufacturers are extremely concerned about. It is also a key factor in material processing process. Its importance is self-evident.
Precision machining process of mold cavity is the last process of moulding process, and it is the most important part that directly affects quality of mold. It accounts for 30% to 40% of total moulding process volume, so it has attracted atttention of experts at home and abroad. In China, although most of moulding process (milling, planing, grinding, electric spark, wire cutting, etc.) have been highly automated in injection molding manufacturers, most of finishing of mold still uses manual processing which seriously affected development of china plastic injection molding to a certain extent.
For a long time, injection molding industry has considered that geometrically balanced flow path design has provided the best natural balance of multi cavity mold, so properties of each cavity can be consistent (Consistency) (Figure 1A-D) ). Same concept of a naturally balanced runner system is also applied to condition of single cavity mold and multiple gates (Figure 1E).
Plastic crates, also known as logistics box, is widely used in machinery, automobiles, home appliances, light industry, electronics and other industries. It can resist acid, alkali, oil, dirt, non-toxic and tasteless. It can be used for storing food, etc. It is easy to clean and convenient for parts turnover, stacked neatly for easy management. Its reasonable design and excellent quality are suitable for transportation, distribution, storage, distribution and processing in factory logistics. Plastic crates can be used with a variety of logistics containers and workstations for various warehouses, production sites and other occasions. Today, logistics management is increasingly valued by majority of enterprises. Plastic crates helps to complete generalization and integrated management of logistics containers, which is a must for modern logistics management of production and distribution enterprises.
In order to improve quality of molds, greatly reduce complaints about mold quality problems, and ensure molds that are satisfactory to customers, common problems in mold manufacturing are summarized, standards are established and implemented as required.
In a set of plastic molding, more elastic materials are needed, including various springs, superior rubber, and nitrogen springs. Different elastic materials are used in different plastic molding manufacturing according to different needs. For example, bending and punching can be done with ordinary flat wire springs, such as brown springs, also known as brown springs; excellent glue is generally used for drawing molds, shaping molds, or flatness.
Electroforming mold are special processing methods that use principle of electrolytic deposition of metals to accurately replicate workpieces of certain complex or special shapes. It is a special application for electroplating. Electroforming was invented by Russian scholar Б.С. Jacobi in 1837.
Which tool steel is right for your plastic injection mold is a complicated system engineering, but it is also pivotal link of plastic molding manufacturing and a major work related to mold life and cost. As following we will analyze in terms of basic function, mold function, metallurgical quality of plastic mold steel, versatility and usage requirements.