Tooling Changes to remove porosity. Die casting porosity is a type of factory output flaw wherein the products of die casting small to large air pockets inside the molded substance. Usually, the substances used for die casting are molten metallic substances, resins and thick plastics. When the consistency of the molten materials becomes too loose, the tendency for air bubble formation increases. Faulty machines such as cracks and chinks on the surface can also be the culprit for casting porosity as small amounts of air can leak inside the substance causing bubbles. Die cast porosity is considered to be a sign of low quality and substandard techniques used, because it causes the product to become weaker than those non-porous outputs. If you are wondering if there are any tooling changes to remove porosity, then you may need to consider these tips.

Holes which are found particularly in thicker regions of the castings may be caused due to the inadequacy of molten substance introduced in the machine. This causes porosity and exposure to air. It should be of adequate amount to lessen or eliminate the presence of air inside. You can also change your tools by cleaning and checking your casting machines. Smoothen it out and seal any cracks on the surface to prevent air from seeping inside the machine. Vacuum devices are also recommended as it largely diminishes the chances of air bubbles and porosity of your output as it sucks up the air that is present inside the mold. The negative pressure will also help in the molding of the substance. However, investing on vacuum devices are quite an expense, so you still need to consider your budget.

What is Die Casting Porosity? In order for you to know what die casting porosity is, you need to know the basics. Die casting is a process wherein a particular amount of molten metal is put inside a container, then it is applied with great force so as to force it into a mold. After this, the metal is left to cool down and harden then it is removed. The same process is repeated over again. Die casting companies use metals which are non-ferrous, or do not contain Iron, as this is the highest factor for oxidation and rusting. Several examples of non-ferrous metals include zinc, aluminum, lead, magnesium, tin and copper.

What is die casting porosity? It is a kind of factory defect in which die casts contain small pockets of void space and air within the metal or plastic, causing it to become porous. Eventually, these air pockets cause the die casted material to become brittle and weak. Usually, die casting porosity is an unwanted result and is considered as a substandard product.

What causes die casting porosity? Basically, it is caused by poor handling and casting process. There might have been small cracks and crevices in the machine where the air could come in. The mixing process of the metal may have been poor, therefore creates bubbles inside the metal. One needs to check up the machine used for die casting regularly to prevent this kind of problem. It is also recommended to use vacuum devices to suck out the air inside the molten substance to reduce the incidence of die casting porosity.

Porosity in die casting parts. Die casting porosity is an unwanted result brought about by poor handling and method. It would be unclear until you know the meaning of die casting. Die casting is a technique or process of pushing an ample amount of molten material such as metal, plastic or resin into a container then pushing it with great force in a mold until it cools down and takes its form. Usually, metals used for die casting are non-Ferrous metals, or those containing no Iron, because Iron promotes oxygenation and rusting of the metal. The most ordinary metals used are magnesium, copper, zinc, lead and aluminum. Porosity in die casting parts is the presence of large bubbles of air inside the molded material, which makes it easier to break up. Porous die casted materials are commonly regarded to as something with low class and low quality.

Is there a way to reduce the occurrences of porosity in die casting parts? Fortunately, there are a few simple ways to be able to reduce and even eliminate the chances of having porous results in die casting. First of all, you need to conduct check-ups on your machines on a regular basis. Crevices and chinks on the surfaces of your molds allow air to seep through the machine, causing air bubbles within the plastic and metals. You can easily fix this problem by sealing it up with a sealant and cleaning it. Another thing you need to consider is to replace your molten materials with ones which have higher quality. The less cohesive and pure your metals and resins are, the more likely will it cause air bubbles inside.

Disadvantages of porosity in diecasting. Diecasting is a method of molding molten metal, plastic and resin into whatever shape you desire. In order to do this, a machine will need to pour the molten substance into a container and then force it inside the mold until it cools down. The substance will eventually harden and take the form of the mold it is in. Die casting is commonly used in making toys, instruments, costumes and even costumes. However, there are certain problems in which the products become porous which contributes a lot to its brittleness. This is commonly known as die cast porosity, an unwanted result brought about by air pockets and void space inside the molded material. Products with porosity typically are considered to be of low standard and poor in quality. Here are some disadvantages of die casting porosity.

Air pockets inside a die cast product; can cause weakness of the material. The structure becomes less stable because the density of the particles melded together is not balanced due to small voids of space within. There are also times when diecasting porosity makes the product look less appealing to the buyer or consumer, due to the impression that porosity is a result of low quality machine and materials. Chances of infiltration are also high due to an imbalance in the density of the material. Luckily, there are a lot of ways to reduce the chances of cast die porosity. However, it would also mean an increase in your expense, but it would also increase the chance of more consumers because of your high grade product materials.

Die Casting Porosity

What is Die Casting Porosity? In order for you to know what die casting porosity is, you need to know the die casting basics. The most common form of Die Casting Porosity is a kind of factory defect in which die cast parts contain small pockets of void space and air within the metal, causing it to become porous.

Porosity in Die Casting is the air trapped by the metal inside the die casting parts. To know more, a basic knowledge of the die casting process is necessary. Die casting is a process wherein a particular amount of molten metal is put inside a shot cylinder, then it is applied (plunged) with great force with a piston so as to force the metal into a die cast mold or die cast die. During this “plunging process”, air inside the cylinder is forced along with the metal into the die casting mold. It is a very fluid turbulent process. The air forced into the mold with the metal and the metal already inside the mold is forced out of the mold through a series of gates, vents and overflows.

After this, the metal is left to cool down and harden or freeze inside the mold. The metal is then removed as a die cast part. The same process is repeated over again.

Die casting companies use metals which are non-ferrous, or do not contain Iron, as this is the highest factor for oxidation and rusting. Several examples of non-ferrous metals include zinc, aluminum, lead, magnesium, tin and copper. Kinetic Die Casting only uses aluminum and zinc.

In the worst case, porosity in die casting parts, weakens die casting parts, if the voids or pockets are very large. Porosity typically matters most in pressure tight die casting parts. When the air escapes through a die casting part, it is typically caused by porosity.

The many forms of Die Casting Porosity are caused by many variables:

• Metal and Mold Temperatures
• Material Cleanliness
• Die Cast Mold Design
• Die Cast Part Design
• Die Casting Machine Pressures
• Die Casting Machine Shot Speed
• Die Casting Spray or Mold Release
• Other forms of porosity can be from “shrinkage” or wall thickness.

Employees of Kinetic Die Casting are POROSITY EXPERTS in die casting parts that need to be free of porosity.

Contact Kinetic Die Casting today if you need “solid” die casting parts.

Kinetic Die Casting, Inc.
6918 Beck Avenue
North Hollywood, California USA 91605
818-982-9200 telephone
818-982-0877 fax
Kinetic Die Casting Information