Netizens left a message asking, what material is used for die steel for cold shrinkage and diameter reduction of pipes?
Because I don’t know what material his shrink tube is made of, but there is a case that can tell him that Midea’s aluminum tube shrink mold uses non stick 8503 die steel.
The main problem with shrink tubing molds is the adhesion and wear of the adhesive material. The mold is prone to scratches caused by adhesive material, leading to poor drawing of the tube. Choosing non adhesive die steel is the key.
Midea has a necking mold made of Cr12MoV with a hardness of 55HRC, which is easy to stick and pull. They have also tried DC53 and SKH-9 high-speed steel, which are easy to stretch. Later, they used non stick 8503 die steel, which worked very well. In the past three years, their necking molds have been made of non stick 8503 die steel.
8503 is a non stick die steel with a proprietary alloy ratio for Wu Dejian tool steel. It is not a national grade, but our company’s grade and our intellectual property, and does not have public attributes.
The hardness of 8503 is 58-61HRC, and its anti collapse performance is twice that of DC53. However, compared with DC53, its performance is doubled, its price is not doubled, and it also has the advantage of non stick material.
But on the other hand, not all shrink tubing molds need to use non stick material 8503. It also depends on the material of the shrink tubing, your requirements for lifespan, your mold cost, and various factors before selecting a die steel that matches the performance.
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Wu Dejian tool Steel is the user’s chief of staff and everyone who has used it buys it.