How to eliminate the bubble defect of aluminum die casting

     The characteristics of the bubble defect of aluminum die casting:
The casting surface uplift, the size of a grain of rice, its interior forms the cavity.
     The cause of bubble formation:
Molten liquid is not completely full of shot sleeve, easy to produce air entrapment, injection speed is too fast; The mold exhaust is not good; The gas in the molten liquid is not removed and the melting temperature is too high. The mold temperature is too high, the solidification time is not enough, the strength is not enough, and mold opening is too early, compressed gas expansion. Too much release agent. The design of the gate is not good.
     The treatment method of the defects of aluminum die casting:
Take in the diameter of the pressure chamber, so that the metal melt can be completely filled with the pressure chamber. To extend the pressure injection time, to reduce the injection speed at the first stage, and to change the low speed and the high-speed injection switch points. Reduce the mold temperature and keep the heat balance. Adding exhaust chute, overflow chute, so that the exhaust is fully, timely removal of oil and waste from the exhaust tank. Adjust the smelting process and carry out degassing treatment. Prolong the holding time of the mold. Reduce release agent dosage.

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Safety management of magnesium alloy die casting workshop

    The magnesium alloy die casting workshop is the same as the ordinary die casting workshop in good ventilation, not only that, but also for fire and waterproof have more stringent requirements. The workshop building must use the non-combustible materials to complete, the floor materials were also heat-resistant and without water suction. Do not install the exhaust fan above the melting furnace, guards against the rain leakage    . Die casting worksite must be clean, do not allow any water and grease, and to have good ventilation conditions.
     Magnesium alloy die casting materials should be stored in a cool dry and ventilated warehouse, the smelting site should not be stored too many magnesium ingot. The regrind material and waste materials of the magnesium alloy should also be stored separately in the non combustible container. The supply of power, fuel, cooling water and gas in the die casting machine and the furnace shall have the remote control, if the accident can be turned off in time. The workshop must have emergency exit and remain unobstructed.
     Fire extinguishing agent for magnesium alloy have dry sand, covering agent, D grade fire extinguisher. These fire fighting equipment should be placed in the place of the eye-catching place and facilitate the emergency use of the scene, dry sand and the covering agent should be stored in the container to prevent be affected with damp, and often check.

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Market conditions of light alloy die casting in China

     After decades of development, China has become one of the major powers of production and use of die casting in the world. From the number of die casting enterprises, as of the end of 2003, China has all kinds of die casting factory about 5000. Among them, the annual output of more than 1000 tons of about 9%, the annual output of most die casting enterprises is lower than 1000 tons, and the equipment and technology are relatively backward.

     From output of die castings to look at the market conditions of light alloy die casting in China. Along with China's automobile, communications infrastructure, 3C, equipment manufacturing, home appliances, electrical and mechanical instrumentation, light industry and other industries of sustained and rapid development, as well as the transfer of foreign die casting industry to China, making the output of China's die castings is rapid growth in recent years. In 2005, the output of our country's die castings was about 864200 tons, ranking third in the world.

     Light alloy die casting industry as the basic industry of the national economic development has the vital role in the whole industry.

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The design of die casting mold making process

     The design of die casting mold making process is to lay the foundation for the design of die mold structure, its focus is starting from the die casting, combined with the characteristics of die casting production carries on the analysis to the structure of die casting, determine the process plan and required the use of die casting machine type. The main job is:

Obtain the necessary information and data and study it.

Analysis of parts drawing of die casting.

To determine the machining parts, machining allowance and processing measures and locating datum.

Design of die casting process according to spare parts.

Select die casting machine type.

Draw the blank diagram of die casting part.

     The design of die casting mold making structure is based on process design, and it is determined the overall structure of die casting die and the detail and technical requirements of every parts. Its contents include: Design of die casting mold overall structure, the details design of die casting mold, verification of die casting die.

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The production process of metal stamping parts factory

     Metal stamping is also known as the sheet metal stamping, the applied force on sheet metal by punching machine and mould, so that its plastic deformation or separation, obtain the desired shape and size. Stamping and forging are plastic working, known as forging and stamping. Metal stamping parts factory production process can be divided into the separation process and molding process.
     The separation procedure is also called blanking, which is designed to separate the stamping parts from the sheet material along a certain contour, while ensuring the quality of the separated section.
     The purpose of the forming procedure is to make the sheet metal plastic deformation under the condition of not destroying the billet, obtain the desired shape and size.
     In the actual production, it is often a variety of processes apply to a metal stamping workpiece. Cutting, bending, cutting, stretching, bulging, spinning, correction is the main stamping process.

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Development trend of car die casting parts manufacturer

    Nowadays, people on the demand of car tends to high performance, low pollution, low energy consumption etc.. There are two ways of reducing the energy consumption of the car: one is improving the dynamic system and the second is the lightweight of the car. To achieve lightweight, the most effective way is to use lightweight materials to manufacture automotive parts. In the seventies of the 20th century, the car die casting parts manufacturer uses the aluminum alloy casting to replace the iron casting is the best choice, and all the rage. At that time, the automobile manufacturing industry, die casting parts is the most important in all kinds of aluminum alloy parts. As a result, the important parts of the automobile adopt the practice of aluminum alloy die casting is popular in all countries.
    With the European and American countries to increase energy saving and emission reduction policies, the requirements are becoming higher and higher for the automotive industry. Now, looking for more light material than aluminum alloy die castings to make automotive parts, become one of the research and development direction. It is worth mentioning that, in the past ten years, some of the leading die casting parts manufacturer in the automotive industry that they proposed the idea of using magnesium alloy to manufacture parts, and has achieved a certain effect.

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The surface treatment of zamak die casting mobile phone shell

   The surface treatment of the zamak die casting mobile phone shell, the more mature method has these:
   Galvanic plating: galvanic plating trivalent chromium white bright surface, galvanic plating trivalent chromium black bright surface, galvanic plating imitation titanium bright surface. These colors can also be made of fog surface effect by sand blasting and pearl sand. (The machining allowance for galvanic plating is 0.07mm per surface).
   Vacuum plating(PVD): after the galvanic plating as a base you can do the vacuum plating of these colors, such as IP black, IP gold. At present, the vacuum plating of these two colors is relatively stable, and other colors need UV protection layer.
   Spray: a lot of color can be sprayed on the zamak die casting compared with the plating. The common color all can be used for zamak die casting mobile phone shell. (For battery cover baking varnish, if the battery cover surface has the pattern or pastes the piece, should pay attention to the phenomenon of oil accumulation.  The machining allowance for spray paint is 0.06mm per surface.)

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The advantages of auto magnesium die casting

In the automotive industry, the auto magnesium die casting has these advantages:
Light weight;
Product integration, 30~60 parts can be integrated into a piece of die casting;
Since the elongation rate of AM series magnesium alloy is high, it can increase the impact resistance and the storage energy of the airbag.;
Reduce machining costs and parts assembly costs;
Reduce vibration and noise;
Reduce the amount of parts inventory;
Improve the rigidity of the car;
Improve the recovery of the product;
Increase product design flexibility.
Now many well-known automobile companies are using magnesium die casting, such as General Motors, Mercedes Benz, Chrysler and so on.

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Development direction of die casting manufacturers in China

    The development direction of die casting manufacturer in China is the most notable in the two aspects of industrial structure and technology trend.
    From the industrial structure, the number of professional die-casting factory will increase and gradually increase the size, some will extend the follow-up processing services; die casting enterprise is the mutual merger, consolidation, and attachment of the trend; joint venture, foreign investment, joint venture, partnership and etc. in the form of die casting enterprises will increase; a portion of the die casting manufacturer consider joining the fleet procurement company, become a member of the supplier and manufacturer and contractor which is composed of intensive formation set of company of. In addition, many parts suppliers will set up their own factory.
    From the technical trend, the main trends are the following:
The process of die casting is gradually improved in theory and will be improved in practice.;
The detection technology of die casting technology will be popularized and improved.;
The degree of automation in the process of die casting production is gradually perfected, and is becoming more and more popular.;
The application of computer technology is more extensive and in-depth;
The technology and technology of large die castings gradually mature;
The application of vacuum die casting is further expanded.;
The mold cavity material has great progress, new material progress;
Magnesium alloy die castings will have a substantial growth;
The application of rapid prototyping model design becomes a new hotspot.;
New alloy varieties and materials are opening up new way for application of die casting.;
There are new breakthroughs in semi-solid metal forming technology.;
Extrusion casting will expand the application field of die casting;
Cultivate complete die casting unit will become the main mode of die casting production.

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The abnormal situations of zinc die casting during production

    The abnormal situations of zinc die casting during production are these:
    Voids: in die casting filling process, because of presence the trapped gas, material impurities and shrinkage stress caused the emergence of holes.
    Flow liner: in the die casting process, because the mold temperature is lower or two different temperature materials mixed together to form flow liner.
    Bubble: in the die casting process, the mould temperature is too high and have voids, resulting in product surface bulge.
    Deformation: zinc die casting product thermal stress or when the demould, the uneven force caused the product shape to change.
    Lack of material: product demould is not smooth, some are adhesion on the mold.
    These conditions are related to the factors such as alloy material, die structure, product structure, feeding port, mould exhaust ect., which need to be solved together with these factors.

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Precision Core Pins and Sleeves

    Yize Mould is engaged in offering precision core pins and sleeves that can efficiently eject plastic and alloy products from molds. Manufactured with good quality metals, they are used to ejector out the moulds after solidification. Custom core pins are made from metals, which are procured by reliable and reputed vendors. We offer core pins and sleeves as customized options based on the client’s requirements.

    We are one of the reputed suppliers of precision core pins and sleeves which is sourced from the certified and reliable manufacturers and vendors. Our core pins and sleeves are thoroughly checked and tested on various required parameters during the procurement process to ensure that they are flawless in all aspects and comply with the international quality standards.

    Dongguan Yize Mould Co.,Ltd. is here to make your job easier, faster and more profitable every step of the way.All the while, you can rest assured that our products are backed by a long-standing tradition of rigorous quality systems that provide you with a 100% satisfaction guarantee.Yize team is here to serve your!Contact us today.

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High Quality Precision Mould Parts

    Dongguan Yize Mould Co.,Ltd.'s mission is to be an integrity company that provides high quality precision mould parts and on-time delivery that will continually exceed our customers' expectations.

    Yize have over 80 colleagues working in the factory of  800㎡. Among them,we have 3 advanced engineers,2 precision mould parts designers, 1 mold designers,6 are QC personnel.

    It is the goal of our company to provide our high quality precision mould parts around the world ,delivered on-time, continually striving to improve. Yize believe that it is our value to achieve this goal and to be the top China precision mould parts manufacturer.Looking for high quality precision mould parts,Yize Mould is your best choice!

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