Release agent for zinc alloy die-casting

Zinc alloy die-casting parts are generally produced using hot chamber die-casting machines. In the entire process of metal die-casting and casting, the role of release agents mainly includes the following three aspects:

1. Before the metal hydraulic injection, it is evenly distributed on the surface of the mold cavity to form an isolation film between the mold and the molten metal, which prevents the mold cavity from being directly washed away by the molten metal;

2. During the die-casting process, it helps the liquid metal to enter the mold cavity and ensure proper filling

3. After the casting is formed, it can be easily demolded.

Based on the requirements of the die-casting process and the analysis of the role of the release agent, the zinc alloy die-casting release agent developed by the release agent manufacturer should meet the following requirements:

1. Has good high-temperature film-forming properties: The casting temperature of zinc alloy is generally around 400 ℃, and it is required that the release agent can form a uniform lubricating film at this high temperature to avoid direct flushing of the mold cavity by the metal liquid.

2. Having good cooling and lubrication properties: The time for a single die-casting molding is generally within 10 seconds (referring to the empty cycle period, which is the sum of the opening, closing, injection, injection return, reverse feeding, reverse ejection, and ejection actions). The metal liquid is cooled, solidified, and shaped from a high temperature of 400 ℃ to the product, requiring the release agent to have good cooling performance. At the same time, to prevent casting sticking and fuzzing, the release agent must have good lubrication and demolding ability.

3. The release agent should be able to form a lubricating film of appropriate thickness and have suitable lubricity and exhaust properties to ensure that the die-casting parts have good surface smoothness and no internal pores.

4. Does not corrode molds and workpieces, and does not affect the adaptability of subsequent processes such as painting and electroplating.

5. Less or no smoke, no impact on the working environment.

6. Easy to use and conducive to automated production.