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• Posted By: xiu umin
• Posted On: Jul 01, 2019
• Views: 1
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• Category: Places
• Description: Material selection of Table Mould(FURNITUREMOULD) https://www.furnituremould.com/product/chair-table-stool-mould/ is a very important link in the whole mould making process. Three principles need to be met in the selection of table mould. Table mould meet the working requirements of wear resistance, strength, and toughness, etc. The moulds meet the technological requirements, and at the same time the moulds should meet the economic applicability. Table mould meets the requirements of working conditions: 1. Wear resistance: When the blank plastically deforms in the cavity of the table mould, it flows and slides along the cavity surface, causing severe friction between the cavity surface and the blank, thus causing the mould to fail due to wear. Therefore, the wear resistance of materials is one of the most basic and important properties of dies. Hardness is the main factor affecting wear resistance. In general, the higher the hardness of die parts, the smaller the wear amount, and the better the wear resistance. In addition, wear resistance is also related to the type, quantity, morphology, size and distribution of carbides in the material. 2. Strength and toughness: The working conditions of the dies are mostly very harsh, and some of them often bear large impact load, which leads to brittle fracture. In order to prevent the die parts from breaking suddenly when working, the table die should have higher strength and toughness. The toughness of the mould mainly depends on the carbon content, grain size and microstructure of the material. 3. Fatigue fracture performance: Fatigue fracture often occurs under the long-term action of cyclic stress during die working. It takes the form of small energy multiple impact fatigue fracture, tensile fatigue fracture, contact fatigue fracture and bending fatigue fracture. The fatigue fracture performance of the table dies mainly depends on its strength, toughness, hardness and the content of inclusions in the material. 4. High-temperature performance: When the working temperature of the table mould is higher, the hardness and strength will decrease, resulting in early wear or plastic deformation of the mould and failure. Therefore, the mould material should have higher tempering resistance stability to ensure that the table mould has higher hardness and strength at the working temperature. 5. Cold and hot fatigue resistance: Some table dies are repeatedly heated and cooled during the working process, which makes the surface of the cavity subject to tension and pressure change to stress, causing surface cracking and peeling, increasing friction force, hindering plastic deformation and reducing dimensional accuracy, thus causing table dies to fail. Cold and hot fatigue is one of the main forms of failure of hot working dies. Such dies should have a high cold and hot fatigue resistance. 6. Corrosion resistance: When some table moulds such as plastic moulds work, due to chlorine, fluorine and other elements in the plastic, strong corrosive gases such as HCI, HF and the like are decomposed and separated out after being heated, thus eroding the surface of the mould cavity, increasing its surface roughness and aggravating wear failure. Click Chair Mould https://www.furnituremould.com/product/chair-table-stool-mould/ to learn about more information.