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0317-8888061 Tel：
0317-8888061 Fax：
0317-8888560 Website：
andymould.com
Common glass mould material
author：安迪模具 Release time：2016-01-13
Commonly used glass mould material is heat resistant cast iron, stainless steel and heat - resisting alloy steel, after processing, the surface intensified treatment.
1. Ordinary low alloy cast iron
Cast iron with excellent thermal conductivity, wear resistance, good casting properties and processing properties, low cost, heat and not sticky performance and is considered in the foreseeable future is still a major glass mould materials, widely used at home and abroad cast iron as a container class glass mould materials, low alloy cast iron is on the basis of the ordinary gray cast iron adding a small amount of Ni, Cr, Mo, Ti, V, such as alloy elements, has good high temperature performance, composed of graphite and matrix organization, and the performance of the cast iron, mainly depends on the number, size, shape and distribution of the graphite.
2. Ductile iron
Compared with gray cast iron, graphite in nodular cast iron is spherical, improves the compactness of the material and reduces the cutting effect of graphite to the matrix, thus improving its mechanical properties. Although nodular cast iron has high strength and toughness, and good oxidation resistance, the thermal fatigue resistance is superior to other cast iron, but because of its spheroidal graphite in isolation, low thermal conductivity, the glass can't rapid cooling in the cavity, thereby limiting the improvement of the forming speed, can't adapt to the requirement of machine high speed production, also limits its application in glass mould, so the only used in the manufacture of small glass mold, such as cosmetics and so on.
3. Vermicular cast iron
Due to the mechanical properties of vermicular cast iron and nodular cast iron, and has high thermal conductivity, resistance to oxidation and antigrowth ability, and have good like gray cast iron casting performance and machining performance, make the vermicular cast iron has good comprehensive performance, and is widely used in the manufacture of glass mould materials.
4. Alloy steel
Alloy steel is usually used only for the glass mould of utensils. Because the thermal conductivity of steel is inferior to cast iron, it is easy to overheat when used, producing adhesion phenomenon. Therefore, the method of forced cooling and rational design of die structure must be adopted. The glass mould should bear a lot of pressure and high temperature. Therefore, the strength of the mould material is high, the heat deformation is small, the heat resistance is good, and the stainless steel and heat-resistant alloy steel are usually used.
5. Nickel base high temperature alloy
Heat resistance and thermal expansion of this kind of alloy is better than cast iron, basic don't grow and oxidation, so use it to make the mould surface crack less, long service life, high productivity, and can improve the smoothness of the glass, but this kind of material's thermal conductivity is not good, and the price is high. It is usually made of precision casting. Only apply to the head, blower, etc., or any of the inserts and pieces.
6. Copper base alloy
It is mainly aluminum and white copper, suitable for the Si, Zn, Fe and other elements. The thermal conductivity of copper base alloy is very good, and the quality of glass products can be guaranteed when high speed molding. Therefore, people attach great importance to it. This kind of alloy to improve the surface finish is the most effective, and the oxidation resistance, thermal conductivity, thermal stability and thermoplastic are good, at the same time the mold is easy to repair, products of good quality and is often used to produce high grade of molding die, die, mouth and stop.
7. Mould surface reinforcement
Glass mould cavity working under high temperature conditions, joint surface are prone to deformation, make the joint line of the glass is bulky, therefore, it is necessary for the joint line mold parts for reinforcement, including die and punch, currently use most is nickel base alloy spray welding.
