How To Avoid Mould Cracking Issue

How To Avoid Mould Cracking Issue

Crack is which we can see in mould .The crack in the mould will damage the life of the mould.

(1)  Unreasonable Structure design lead to crack and how to avoid

In the design of plastic mould structure, unreasonable structure design, for example, bolt hole is too closer to the edge will decrease the strength; the corner is not smooth , causing stress concentration, all these reasons will lead to mould crack  during molding process. For this structural cracks, because the mould has already done, it is not possible to change structure, we can only add frame to strength it. plastic mould

(2)  unreasonable heat treatment result in cracking in mould and how to avoid

There are many  parts in mould, such as cavity and core, guide bush, guide pillar, all these need heat treatment, to improve the abrasive resistance and prolong the mould life. But if we choose unreasonable heat treatment condition, makes big difference between spare parts material. This difference will lead to crack. For this, we should pay more attention to the heat treatment condition, controlling the heat operating strictly

(3)  The less stiffness of mould and how to avoid

Injection mould wills under big pressure when it works, if the stiffness is not big enough, mould crack will easyly appears. To solve this problem, we also should notice the mould structure, must ensure big stiffness and strength of mould

(4)  High brittleness of the mould material will make mould crack and the method to avoid.

Some material with high brittleness, we heat the material slightly, the HRC will be very high, Such as carbon steel material. So we should choose material with excellent toughness for mold manufacturer.

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Thinwall Injection Mould

Thinwall Injection Mould

In order to produce the new parts any sorts of machine, Moulding process is utilized. Moulding process helps to generate the strong and worthy parts easily and instantly. Bi-color injection mold is preferred by many companies, as it will produce the component in two colors. The components, which produced in this model, will be more attractive. Mostly, toys, dolls, toothbrushes, buttons, switches will be prepared using this model. Apart from Bi-color injection mold, BMC molding and thin wall Injection molding products also have more fame among the people. The important and specialty of this process exist in the selecting the color combination. If the color combination matches well, the certain product will reach the customers in large amount and its market ranges increases a lot.

BMC injection moldings products will be more strong and stable. Thus, the plastic mold components required for the transportation, sports, electrical related works are prepared using this moulding process. The materials prepared using the BMC molding process will be very flexible and they can be extended easily. BMC objects will be great in withstanding the heat for long time. Thus, electrical appliances are mostly prepared using this model, in order to get the heat withstanding capacity. BMC material will remain constant upto 130 degree of heat. Also, BMC material will not be wasted soon and they can remain for long period without any damage, if it is handled carefully. During BMC molding, the essential materials should be mixed in the perfect ratio and suitable temperature should be applied. Then only it is possible to procure the stretchy and reliable BMC materials.plastic mold

Thinwall Injection Mould to make Thinwall Injection Mold molding parts, the process is not that much easy process as like other molding process. In order to generate the thin products, this molding process is utilized. Using this process, large number of components can be prepared in a short period. Mostly to produce the electronic components like mobile, laptop and computer parts, this molding process will be used.

As Chinese people prefer the plastic utensils in large amount, there is large demand for the plastic utensils in china. The thin plastic utensils are prepared using the Thinwall Injection Molding process. High speed plastic molding machines, thin wall moulds are very essential to carry out this process. Along with these parts Robot system also should be available to execute this process successfully. Robot system performs the work of lifting and placing the molded material carefully in one place.

Chinese Molding companies are very careful in producing the products using the moulding process. They incorporate the high quality materials during the moulding process to procure the quality rich products. Thus, the molding products created by the Chinese companies are very reliable and worthy. Not only they concentrate in materials to be incorporated but also they will focus on mold machine, mold design, cooling system and so on. They will pay attention on each and every thing. These reasons play an important role in delivering the Chinese molding products in market in large amount. Since, molding process is performed with help of machines; the shape of the products will be accurate.

Metal Casting

AQL Acceptable Quality Level. A quality level established on a prearranged system of inspection using samples selected at random.

As-cast condition Casting without subsequent heat treatment.

Backing sand The bulk of the sand in the flask. The sand compacted on top of the facing sand that covers the pattern.

Binder The bonding agent used as an additive to mold or core sand to impart strength or plasticity in a “green” or dry state. Read more

Mechanical Properties of Malleable Iron

The different grades of malleable iron are essentially the result of different heat treatments. Just as a medium carbon steel can be heat treated to a wide range in properties so can malleable iron, but malleable is even more versatile. The combined carbon content, on which heat treatment depends, can be adjusted from none, as when the microstructure is entirely ferritic, to that of a fully pearlitic structure. Read more

Mechanical Properties of Cast Carbon and Low Alloy Steels

For the purpose of this article, carbon steels are considered to be those steels in which carbon is the principal alloying element. Other elements that are present and that, in general, are required to be reported are manganese, silicon, phosphorous and sulfur. In a sense, all of these elements are residuals from the raw materials used in the manufacture of the steel, although the addition of manganese is often made during the steel making process to counter the deleterious effect of sulfur and silicon is added to aid in deoxidation. Read more

White and High Alloy Irons

An important group of alloyed irons that fall outside of the ordinary types of Alloy Die castings have been designated the white and high alloy irons, or the special irons. The high alloy irons are considered separately because their alloy content exceeds 3% and they cannot be produced by ladle additions to irons of otherwise standard compositions.

The high alloy irons are usually produced in foundries that are specially equipped to produce the highly alloyed compositions. These irons are often melted in electric arc or induction furnaces, which provide for precise control of composition and temperature. The high alloy irons are sold at premium prices and are expected to outperform ordinary compositions in applications that involve severe service conditions. The foundries that produce these irons may be equipped with heat treating furnaces and quenching equipment or cooling facilities to provide for the most economical use of alloys. Read more