How much hardness is better for the mold pad of aluminum profile extrusion machine?

Wonsten Group: Selection of Mold Pads for Extruders

Introduction to Mold Pads:

Mold pads, also known as backing plates, play a crucial role in the extrusion process that links the mold to the machine table. They serve as a transition element, allowing for efficient heat transfer and ensuring that the extruded material can be properly shaped and cooled. The selection of the mold pad, especially its material and hardness, directly impacts the longevity and efficiency of the extrusion process, as well as the protection of the machine table.

Material Selection and Hardness for Mold Pads

Mold-to-Mold Pad:

Material Suggestion: For the material used as the backing plate in the mold, it is recommended to use CR12MoV which is quenched to a hardness of 55HRC. This material ensures sufficient strength and durability without being too hard and potentially damaging to the machine table.

Benefits: CR12MoV is known for its excellent wear resistance and hardness, making it a suitable choice for the direct interaction with the extrusion mold.

Mold-to-Machine Table Pad:

Material Suggestion: For the backing plate used between the mold and the machine table, it is recommended to use 40Cr steel. The area of this plate should be large, and its thickness should be thick. This ensures that it can effectively spread out the forces involved in the extrusion process, reducing the risk of damage to the machine table.

Hardness and Treatment: It is recommended to quench and temper the 40Cr steel to a hardness of 28HRC. This level of hardness provides a good balance between strength and the requirement to avoid damage to the machine table.

Considerations Based on Extruder Tonnage

Extruder Tonnage: The selection of the material and the hardness of the mold pad may need to be adjusted based on the tonnage of the extruder in use. Higher tonnage extruders require a thicker and more robust mold pad to handle the increased pressures and forces involved in the extrusion process.

Wonsten Group’s Expertise

At Wonsten Group, we understand the specific requirements of different extrusion processes and provide expert advice and solutions tailored to your needs. Our team of engineers can help you select the appropriate material and specifications for your mold pads, ensuring protection of your machine tools and efficient extrusion operations.

For more information on Wonsten Group’s products and services, or for assistance with your specific needs, please contact our team directly. We are here to help you achieve the highest quality in your extrusion processes.

For the mold pad of the extruder, the backing plate used for the transition between the mold and the machine table does not need to be too hard, but it needs to have sufficient thickness and area. lf the backing plate is too hard, it will damage the working table of the machine tool. specifically, it depends on how many tons of extruder is used? Then choose the appropriate material for the mold mat.

Suggestion: cri2Mov is used as the backing plate in the mold, guenched to 55HRc. it is recommended to use 40cr as the backing plate between the machine tools of the mold, the area should be large and the thickness should be thick, and the hardness should be quenched and tempered to 28HRc. This protects the machine table top from damage.