Die Casting Parts Requirements
Die casting process is a special process, the quality of die casting in the die-casting process can not be actually controlled, all the process parameters are only indirect control of external control only, the true quality of die casting can only be verified after the test; The quality of the die casting has been formed, and the quality of the die can not be changed. For this reason, in order to ensure the quality of the die-cast product, it is necessary to take the necessary control measures for the die-casting process, Die Casting Parts such as strict control of the stability of the process parameters during the die-casting process and the consistency of personnel operations; Qualified die castings, as much as possible to reduce the loss of waste, Die Casting Parts in the production process is particularly necessary.
Production practice shows that improving the quality of aluminum alloy melt is the key factor to improve the quality of die casting, aluminum melting process to the melting temperature, melting time, back to the charge of the ratio should be clearly defined in the aluminum alloy smelting process, Where the use of back to the charge of aluminum liquid, the required refining agent, the proportion of slag removal agent than the use of aluminum alloy ingot melting, the increase in proportion and the ratio of the charge back to a corresponding relationship. After the smelting of the metal liquid to timely de-slag, degassing work, in the process of concentration of molten metal per pot should be the chemical composition of the detection, to ensure that the product in the melting process of various chemical composition qualified. Die Casting Parts But also to avoid long smelting, it will make the alloy liquid hydrogen content increases, will affect the strength of the die-casting products, air tightness and other properties.
For the production of those who have the requirements of the airtight casting, but also the need to monitor the gas removal effect to ensure that the gas in the alloy liquid to meet the requirements, Die Casting Parts if necessary, the use of hydrogen car on the aluminum liquid gas content of the qualitative measurement and the use of density Measurement method to monitor the quality of aluminum liquid.
Slow injection is the role of the slow movement of the punch, the metal melt accumulation in the punch front without jump wave, with the punch forward, the melt level gradually increased to reach the top of the pressure chamber, the pressure chamber The gas is removed from the mold exhaust. Die Casting Parts To this end, in the slow injection preheating mold stage, it is necessary to set the process of slow injection speed to verify.
It is generally possible to use a simple method to confirm the slow injection process parameters. When the plunger starts to reach the quick start position, the plunger stops automatically (the function can be customized on some die presses). To be alloying liquid after cooling out, cutting, Die Casting Parts turning observation to judge.
At the correct slow injection speed, when the molten metal reaches the inner gate, the molten metal in the press chamber has completely become a complete cylinder. Die Casting Parts When it is found that the internal tissue is relatively dense and there is no visible pores, Slow injection speed is generally appropriate. Inappropriate slow injection speed, will produce a serious volume of gas.