Injection molding tie bar material

Injection molding tie bars are used to hold the mold halves together during the injection molding process. They are typically made of steel, and the choice of material is usually based on the size and strength requirements of the mold, as well as the type of plastic being molded and the expected number of cycles the mold will be subjected to.

There are several types of steel that are commonly used in injection molding tie bars, including:

1. Carbon steel: This is the most economical and widely used option for tie bars. It is strong and durable, but it is also prone to corrosion and can be difficult to machine.

2. Stainless steel: This type of steel is more expensive than carbon steel, but it is corrosion-resistant and easy to machine. It is a good choice for molds that will be used to produce medical or food-grade products.

3. Chrome-moly steel: This type of steel is a low-alloy steel that contains a higher percentage of chromium and molybdenum than carbon steel. It is stronger and more wear-resistant than carbon steel, and it is often used in large molds or molds that will be subjected to high stress.

Barrelize uses 38CrMoAlA and 42CrMo as the main material of injection molding tie bar. 

38CrMoAlA is a type of alloy steel that is commonly used in the manufacturing of injection molding tie bars and other components. It is a high-strength, low-alloy steel that is resistant to wear and corrosion, and it has a high fatigue strength, making it suitable for use in high-stress applications.

The 38CrMoAlA alloy is composed of 38% chromium, 0.3% molybdenum, 0.6% aluminum, and the balance is carbon and iron. The addition of chromium and molybdenum to the steel increases its strength and wear resistance, while the aluminum helps to improve its fatigue strength.

In addition to injection molding tie bars, 38CrMoAlA steel is also used in the production of other parts and components that require high strength and wear resistance, such as gears, shafts, and valve parts. It is also commonly used in the aerospace and defense industries due to its high strength and corrosion resistance.

42CrMo. It is a medium-carbon, low-alloy steel that is characterized by its high strength and toughness.

The 42CrMo alloy is composed of 42% chromium, 0.9% molybdenum, and the balance is carbon and iron. The addition of chromium to the steel increases its strength and wear resistance, while the molybdenum helps to improve its toughness and fatigue strength.

42CrMo steel is known for its good machinability and weldability, and it is often used in the production of parts and components that require high strength and toughness, such as gears, shafts, and valve parts. It is also commonly used in the automotive and aerospace industries.

In injection molding, 42CrMo steel is often used for tie bars and other components that require high strength and durability, as it can withstand the high pressures and temperatures of the injection molding process. It is also resistant to corrosion and wear, making it a good choice for molds that will be subjected to high cycles or harsh environments.

4. Aluminum: Aluminum is a lightweight and corrosion-resistant material that is sometimes used for tie bars in small or low-stress molds. It is easier to machine than steel, but it is not as strong and is not suitable for use in high-stress applications.

In general, the choice of material for injection molding tie bars will depend on the specific requirements of the mold and the end-use application of the molded parts.