Mold is a necessary tool for mass production of parts and a necessary link for mass production of plastic shell materials. The quality of the mold also largely determines the quality of the product. Of course, the mold link also accounts for a large proportion of the product development cost. What is the processing flow of the injection mold?
Stainless steel mold processing
1、 Injection mold processing flow:
1. Generally, the raw materials do not need to be dried. In some cases, they are baked at 80 ℃ for 2 hours;
2. The molding temperature range is large, and the heating, melting and curing speed are fast, so the molding cycle is generally short; Temperature parameter: the barrel temperature is about 200 ℃, silver wire is easy to appear when the material temperature is too high, and the transparency is poor when the material temperature is too low;
3. Mold temperature control: mold temperature is generally 50-80 ℃;
4. GPPS has good fluidity, and no high pressure is required in the beer molding (usually the injection pressure is about 10Mpa), so as to avoid increasing the internal stress of the rubber part due to excessive pressure - which may lead to cracking (especially after the painting and decoration process);
5. The injection speed is straight and high enough to weaken the water inclusion. However, because the injection speed is greatly affected by the injection pressure, too high a speed may lead to problems such as flaring, sticking to the mold during ejection, and white top crack during ejection;
6. Appropriate back pressure: if the back pressure is too low, the screw rotation is easy to overflow into the air, the particle density in the barrel is small, and the plasticizing effect of rubber particles is not good, affecting the apparent quality of rubber parts (generally 10-20kg/cm2); g) The fine nozzle on the mold is generally designed as 0.8-1.0 mm. h) glass fiber reinforced PS-GF30, the barrel temperature is 180~275, the mold temperature is 20~80, and the molding shrinkage is 0.1~0.2. The density is 1.29/cm3.
Mold injection processing
2、 Four methods of mold injection processing:
1. Use CAD mold processing method.
This method generally uses some existing mold standards to directly process and manufacture the mold when processing the mold. Because many products are similar in appearance when designing, so when processing the mold, you can choose some existing mold standards to directly process and manufacture the products with small differences in appearance, This allows the mold to be manufactured more quickly. This manufacturing method is applicable to many mold processing and manufacturing, and some integrated technologies can be used in mold manufacturing.
2. Select the processing method of stamping die CAD die.
This method is similar to the first method in processing and manufacturing molds, but it is an improvement on the previous method. When this method is used to process and manufacture molds, some blanks are used to further optimize and design the defects, so that the molds can have a high utilization rate. When this method is used to process and manufacture molds, Because the requirements of each part are different, the methods used in the process of stamping die are also different. Using this method can greatly improve the utilization rate of blank materials.
3. Select the die processing method of computer layout.
With the continuous development of science and technology, computers are playing a more and more important role in people's life. When people are processing and manufacturing molds, they can use computers to layout, and use computers to layout several different styles. When using computers to layout, people can use semi-automatic and full-automatic layout methods, The algorithm and characteristics used are different. People can use computers to layout the mold, so that the whole manufacturing process can be completed more efficiently when the mold is processed.
4. Stamping die processing method can be adopted.
When processing and manufacturing the mold, people can also use some mathematical models to describe the mold, and then use the stamping process to process and manufacture the mold. When using this method, the precision of the mold produced is higher, the structure of each part is more perfect, and the strength of the mold is stronger, So that the mold can meet the needs of people.
Injection Molding of Automobile Baffle Mold
The processing method of injection mold is generally only applicable to the production of thermoplastic products. Injection molding technology of plastic products is very common today. We start with daily chores such as toothpaste packaging, beverage packaging, skin care product packaging, as well as some plastic products, mobile phone chargers, car chargers, etc.