Aluminum die casting Die casting cracking precautions

Many enterprises in the production of aluminum die casting aluminum die casting production process often encounter a situation casting mold cracking, how to avoid such a situation does arise, following Tianjin Golden State Auto Parts Company'll tell you about aluminum how to die casting casting molds should avoid cracking problems.

To prevent cracking of the die-casting aluminum die casting mold problems and improve the life of an aluminum die casting molded parts, such as moving, set the mold core heat treatment requirements: Hardness ensure HRC43~48, material selection SKD61 or 8407.

Mold before casting production should be fully warm-up act, and its role as follows:

1, die casting mold should be able to achieve a better balance of heat, so that the solidification rate of aluminum die casting is more uniform and beneficial to transmit pressure;

2, to maintain effective liquidity to fill aluminum die casting has good formability and improved surface quality of the die-casting of time;

3, to reduce the adverse pre-production and a corresponding increase in productivity of die castings;

4, reducing the casting mold thermal alternating stress, lost wax casting, improve die life.

Aluminum die casting die casting mold under tremendous pressure, alternately use must be noted that in order to obtain material from the mold design, processing, heat treatment and operating life of the mold, if necessary to improve the life of the die can be achieved:

1, choose a higher-quality die-casting mold material;

2, need a reasonable wall thickness and size of the mold design mold;

3, note that stress tempering after roughing;

4, using the correct heat treatment, hardening fast enough;

5, completely polished to remove EDM harassment quality layer;

6, no highly polished surface

7, minimize the amount of aluminum is used to accelerate the injection speed;

8, to ensure proper cooling of the mold, the cooling water temperature must be kept 40 to 50 ℃;

9, in the temporary shutdown, you can try to shape and reduce the amount of cooling water to avoid boot time casting molds to withstand thermal shock;

10, at the maximum temperature of the surface of the model, the coolant should be closed

The above is Metal Products Co. Taixing brothers to tell you about the precautions aluminum die casting Die casting cracking, hoping to give the majority of the aluminum die casting manufacturer of some help, but the majority of the companies jointly welcomed the peer exchanges and common progress.