Most Common issues in Stainless Steel Lost Wax Casting

In the stainless steel kehilangan pengecoran lilin process, two molds are used. The first is made of a metal. It can be easily worked in the inverted shape of the piece. This comes in two halves usually.  Then, this mold is filled with wax to form the models. Hence, it is its final shape.

How stainless steel does lost wax casting model work?

These models are placed in a box. Moreover, these are filled with foundry sand. Later, an operator gives it heat until the wax melts. Similarly, he drips and another mold with the inverted shape of the piece.

This yes is filled with the molten metal. In addition, it gives rise to the piece. The advantages of this process are that several parts can be produced. Similarly, all parts come in a series with a high degree of detail and practically finished. Subsequently, the disadvantage is that the size of the pieces is limited.

What is casting?

The casting is the process where we mold different objects for multi purposes. In simple words, a metal comes in liquid state first. Later, it goes into a mold. Later, we can develop different shapes via pengecoran lilin stainless steel yang hilang . So, we can use these molds for various industries.

In many cases, casting is the simplest and most economical process of producing a part.

The foundry can give rise to finished parts, already in their final shape, or not. In this case, they can undergo mechanical forming processes:

• dimensional adjustments
• welding or machining

But, in general, castings go through finishing processes such as:

• Grooving
• Machining
• and deburring

Bila perlu, bagian tersebut juga bisa menjalani perlakuan panas. Ini untuk memberikan ketahanan yang lebih besar karena pengecoran lilin stainless steel yang hilang memiliki ketahanan mekanis yang lebih sedikit.

Bagaimana cara mengubah model lilin menjadi logam melalui pengecoran lilin yang hilang?

Pemodelan lilin adalah teknik perhiasan untuk membuat bentuk dengan memahat bahan. Hasilnya adalah sepotong lilin. Selain itu, harus diubah menjadi logam dengan cara dituang dengan lilin yang hilang.

Apakah kita mengetahui proses ini?

Langkah pertama adalah membuat model dengan tangan dari perak atau lilin. Oleh karena itu, kami memiliki dua titik awal yang berbeda. Itu tergantung pada bahan di mana prototipe itu dibuat.

To transform the wax piece into metal, the model is attached to a rod, also made of wax. It forms a “tree “also. As the process takes time and energy, usually the pengecoran lilin stainless steel yang hilang completes with several parts in the same structure.

Moreover, these models can be different too. The final formation of the structure resembles a tree. This “tree” is placed inside a metal cylinder. And the calcium sulfate coating is poured into it.

Wax trees for the stainless steel lost wax casting process

After the coating hardens the cylinder gets heat to remove the wax. This expels, leaving empty spaces with the negative forms of future pieces.

Logam disuntikkan oleh gaya sentripetal melalui pengecoran lilin stainless steel yang hilang . Itu menempati ruang kosong yang ditinggalkan oleh lilin. Setelah logam mengeras, lapisan dihilangkan dengan semburan air dingin. Bagian logam dikeluarkan dari "pohon" dengan tang khusus dan digunakan untuk perakitan dan finishing.

Reproduksi serial

Bagian ini perlu dibuat salinannya atau jika modelnya terbuat dari logam. Prosesnya dimulai dengan melepas cetakan karet. Karet khusus ini menutupi pilot piece dan divulkanisir. Setelah pemanasan, karet memperoleh konsistensi yang kokoh.

Kemudian, karet dibuka, pilot piece dilepas. Dan sebagai hasilnya, kami memiliki bentuk negatif dari potongan pilot di dalam karet.

Model dan karet

By pressure, melted wax is injected into the mold. When the wax cools, we have a copy of the metal piece, only in wax. The wax piece is removed from the rubber mold. And it is ready to be used again. We can make as many wax copies as necessary.

The wax pieces are fixed on rods by stainless steel casting. It is also made of wax, forming a “tree”. And it follows the same process described above.

Stainless steel lost wax casting Problems

Some problems can occur during lost wax casting. The reasons for these defects to occur are diverse. Some of these causes are:

1. When a hole occurs: poor quality wax or coating, overheated metal
2. External balls occur: weak vacuum, lack of water in the coating mixture, badly beaten plaster
3. When streaking occurs: excess water in the coating mixture.

What is the lost wax process?

Now let's talk about the theoretical part summarized for you to understand. In this type of production, a ceramic wrap is created around a prototype. It is usually made of wax or plastic. The prototype hardens to form the removable casting mold. It is called lost wax because during the process the liquid wax leaks. Moreover, it allows the initial piece to solidify.

Stainless steel lost wax casting process is repeated several times until you have the desired number of wax pieces. They are fixed in a structure that resembles a tree. It interconnects them all in a single entrance hole. This allows the temporary wax pieces to leave and the molten metal to enter.

Then, the tree is dipped in ceramic and touched up with sand. Similarly, it increases the resistance and hardening the piece. After that, this tree is heated again so that the piece has more structure and rigidity. This creates a hollow structure and allows for no thermal shock, which would cause the structure to break.

stainless steel lost wax casting conclusion

The transformations of metals depend mainly on pengecoran lilin stainless steel yang hilang . It is evident that the casting is accompanied by several processes and stages. Here the appropriate choice of each step depends on the geometry of the part, the type of alloy to cast, the number of parts to be produced and the desired surface quality.

The main foundry processes are:

• Sand mold casting;
• Precision casting (lost wax);
• Casting of permanent gravity molds;
• Pressure casting;
• Pengecoran sentrifugal;