Zinc alloy die-casting The correct cooling water has a great impact on production efficiency, casting quality, mold life and so on. It is understood that Shenzhen zinc alloy die-casting cooling water opening method, that is, before the mold production, the cooling water should be turned off before preheating. After preheating to a certain temperature, the zinc alloy die-casting begins to cool after the die-casting of several die-mode temperatures, zinc alloy Die casting is gradually opened to the specified opening degree by several modules. In the production, the cooling strength of the cooling system should be adjusted according to the situation, and the opening degree of the valve core can be adjusted by the zinc alloy die-casting and spraying to achieve the mold heat balance. .

Below, Shenzhen Zinc Alloy Die Casting Factory introduces several types of injection parts and aluminum die-casting molds, and the cooling water structure is as follows:

1. Shenzhen zinc alloy die-casting body cup

The use of zinc alloy die-casting integral cups is beneficial to ensure the coaxiality of the punch movement, avoiding the influence of different shafts caused by manufacturing errors of the split cup and the sprue bushing. Zinc alloy die casting can effectively reduce the punching. Head consumption.

2, Shenzhen zinc alloy die-casting shot connecting rod and shot punch

Zinc alloy die-casting injection rods and injection punches (for the purpose of reducing the cost of repeatedly using the injection rods, and some with the injection joint) cooling method, zinc alloy die-casting from the injection rod and die-casting machine joint Into the cooling water, zinc alloy die-casting to achieve good results, generally using the interpolated copper tube (iron pipe is not commonly used) forced cooling, zinc alloy die-casting to ensure that the low temperature cooling water reaches the injection punch first With heat to achieve a cooling effect.

3, Shenzhen zinc alloy die-casting gate set sprue sleeve

The sprue bushing is the first place in the die-casting mold to contact the aluminum liquid, and it is also the place of temperature. It is easy to cause “running water” and pull-burning due to improper matching of the punch and the sprue bush in the production. The large consumption of the head has become a major problem for many die-casting manufacturers. Therefore, regardless of whether cooling water is required for the molding part of the mold, the sprue bushing should be provided with a cooling passage in the mating section.

4. Shenzhen zinc alloy die-casting mold forming part

(1) Zinc alloy die-casting point-cooling structure: It is suitable for single-part deep cavity molds and cores, etc. The phenomenon of individual deep cavity or deep cavity part of the molding part is relatively common in die castings, and less. The mold is wrapped in a large amount of aluminum liquid, which easily causes the mold to overheat, causing sticking of the mold, hot cracks, etc., that is, the deep cavity mold is required to pass the cooling water to force the Shenzhen zinc alloy die-casting copper tube to be cooled, to ensure cooling. The water is cold and hot.

(2) Zinc alloy die-casting integral cooling structure: It is suitable for the structure where the molding part is generally not deep, and it is not necessary to separately cool a certain part separately. The zinc alloy die-casting only needs to continuously take away the heat of the mold in the entire molding part. According to the structural characteristics of the molding part of the mold, some zinc alloy die-casting is required in other parts, even if cooling water is not required, the lower and lower slider parts of the moving and static lining are usually exposed to aluminum liquid, which is usually a place of overheating. cool down.

(3) Zinc alloy die-casting overall cooling + point cooling mixing use: Many moving, lining lining and slider forming parts are mostly not deep but partially too deep. Zinc alloy die casting needs mixed cooling and point cooling at this time. Zinc alloy die casting is more common in this case. In order to facilitate the control of the overall cooling and the point cooling, the cooling water may be separately provided according to the structure, or the zinc alloy die-casting may be set twice.