Die Casting Parts Analysis
Casting yield is directly related to the cost of casting enterprises and profits, Die Casting Parts casting the quality of the impact of the reputation of the enterprise and reputation. For many die-casting production enterprises, in the castings produced, there may be leakage phenomenon, Die Casting Parts such a casting is not repaired is not normal use, and that the reason for this problem? This article will do a detailed analysis.
In the process of die-casting production, Die Casting Parts often encountered in the mold gate parts of a serious sticky mold or sticky phenomenon, aluminum alloy adhesion in the gate around the wall, not easy to remove, this situation in the new mold appears more many. The factory in the beginning of the production of 186 boxes, but also because of the gate parts sticky mold block sticky and there are cracks, Die Casting Parts resulting in low product qualification, the impact of the normal production of die-casting. There are many factors that lead to sticky molds, such as the chemical composition of the alloy is not qualified, because the aluminum alloy and iron have a strong affinity, under certain conditions, easily react with the H13 mold lead to sticky mold; mold release effect is poor ; Die Casting Parts The process parameters set unreasonable; mold gate design is unreasonable; mold stiffness or surface roughness is not enough, which need to be in the specific production process to solve. After analysis and summary: We have taken the following measures to solve the 186 box gates adhesion and cracks.
Aluminum alloy and iron have a strong affinity, when the aluminum alloy in the iron content of less than 0.7%, the aluminum alloy and H13 mold easy to produce chemical reactions, Die Casting Parts adhesion to the mold surface, resulting in sticky mold, but the iron Reduce the tendency of aluminum alloy sticky mold, easy to die casting. With the increase of iron content, the mechanical properties decrease, Die Casting Parts especially the impact toughness and plasticity decrease, the thermal cracking tendency increases, and also causes the aluminum alloy to appear hard spot, the processing performance deteriorates. Therefore, die-casting aluminum alloy iron content should be controlled at 0.7% to 1.3%.
So we first deal with the chemical composition of aluminum alloy analysis, the spectral analysis of this product using ADC12 aluminum alloy in the iron content of about 0.9%, alloying element composition is no problem.
High metal pressure flow will increase the bonding of alloys and molds, different metals between the high pressure friction heat makes the welding between the metal, Die Casting Parts but also a sticky phenomenon. The pressure of the metal flow is required by calculating and setting the minimum pressure required to produce a high quality cast product. This product is produced under the force of DCC1600, according to the requirements of the product to calculate the required supercharging pressure of 24 ~ 26Mpa, Die Casting Parts to avoid excessive pressure in the metal flow bonding, Die Casting Parts reducing the clamping force of the mold can also be avoided The occurrence of cracks. High-speed metal flow erosion type wall, acceleration die-casting mold wear, Die Casting Parts high-speed metal flow into the wall into the mold, adhesion mold surface, Die Casting Parts can not be followed by the metal flow into the surface defects and so on. Pressure and speed are complementary and mutual constraints of the two factors, Die Casting Parts in order to meet the casting process requirements, die-casting pressure and filling speed should be done stepless adjustment.