Matters needing attention in the manufacture of zinc alloy die castings

Or the structure of the object or the obtained object is deformed into die-casting through enhanced deformation.

During the operation, we always accept the inspection of professional testers, and formulate reasonable operating rules during the operation.

The organization of the product has changed.

The impact toughness, shape performance and impact resistance of the product have also been significantly improved.

One-step heat treatment can improve the strength, hardness and shape characteristics of all parts.

Secondly, if the production process is unreasonable or the quality of raw materials is poor, the internal quality and appearance of the product may be affected, and serious processes may be discarded.

We must perform all processes in accordance with the technical rules of the product.

The step of the process is to verify the finished product.

Zinc alloy die casting often encounters oxide slag, but most of the media is scattered on the die casting surface, some are distributed in the ventilated corners, and many ports are yellow or off-white.

In the process of zinc alloy processing, the reasons for pickling and alkali washing can be found, the material in the furnace is insufficient, and the number of furnace sources is too much.

The designed infusion system is not very reasonable; the slag in the die-casting alloy solution has not been cleaned, the operation specification during injection is not perfect, and the slag is also brought in.

In addition, the calming time after prevention of refining and deterioration is not long.

The manufacturing process of zinc alloy die-casting machined parts requires care.

(1) For sand casting, larger-sized castings (without suitable flasks) and castings with multiple cavities with complex surfaces, how to form a set to form a core can achieve better results.

(2) When assembling the core, the following four aspects must be grasped: the placement stability of the sand neutron; the positioning accuracy of the sand neutron; the operability of the neutron shape; the compatibility of the neutron with other process components. When forming the group, the sand outside the group sand must be polished to prevent leakage.

(3) Large die-casting parts have a large number of grids and partitions, and the defects of insufficient pouring should be avoided. Not only is the gate aligned with the direction of the grille or area, but the exhaust of the casting itself is also very important. Process element.

(4) For thinner ring or frame-shaped castings, when the casting system is placed in the center of the casting, the runner between the gate and the gate is formed in a dotted form to prevent shrinkage. tensile stress is generated, the casting will deform and crack.

(5) For very thick parts of large die-cast parts, it is wise to place a riser to prevent the formation of high-temperature parts on the basis of the original high-temperature parts. Generally, this effect is better than using standpipes alone.

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