Glass mold material for small-hole blowing and pressing and preparation method thereof

Abstract

The invention discloses a glass mold material, which is high in performance and applicable to small-hole blowing and pressing, and a preparation method thereof. The glass mold material for small-hole blowing and pressing comprises the following chemical components by mass percent: 3.30-3.65% of carbon, 1.90-2.10% of silicon, 0.50-0.80% of manganese, 0.60-0.80% of molybdenum, 0.09-0.15% of vanadium, 0.19-0.25% of titanium, 0.40-0.70% of nickel, no more than 0.60% of chromium, no more than 1.00% of copper, less than 0.30% of phosphorus, less than 0.08% of sulphur, 0.007-0.012% of rare earth, and the balance being iron and normal trace impurity. The material overcomes the defects of the material performance of a bottle-making machine under high-speed rotation besides the advantages of the traditional vanadium-titanium-molybdenum cast-iron glass mold material, and further improves the hardness and the toughness of the material, so that the material has better abrasive resistance, heat resistance and high-temperature oxidation resistance, and the glass mold prepared from the material has better stability, and more accords with the demands of a small-hole blowing and pressing process, so as to meet the lightweight needs of a glassware factory.

Description

technical field [0001] The invention relates to a glass mold material, in particular to a cast iron glass mold material with high performance and suitable for small mouth pressure blowing, and also relates to a preparation method thereof. Background technique [0002] Glass molds are equipment used to manufacture glass containers. The molding of glass products and the quality of the molding of glass products depend on the quality of the mold. [0003] Since the mold is frequently in contact with molten glass at 700°C to 1100°C during use, it suffers from oxidation, growth, and thermal fatigue. At the same time, the contact surface of the mold is worn due to friction with the glassware. This requires mold materials to have good heat resistance, wear resistance, corrosion resistance, thermal shock resistance, oxidation resistance, growth resistance, and thermal fatigue resistance, among which oxidation resistance is the most important performance index. It is also required t...

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Problems solved by technology

[0007] However, with the continuous development of glass bottle-making machine speed and the continuous introduction of lightweight bottles, the small-mouth pressure blowing process has further special requirements for mold materials. The traditional vanadium-titanium-molybdenum cast iron glass molds seem to be unable to do what they want, such as : The wear resistance cannot keep up with the requirements, the hardness is not enough, sometimes it is easy to appear "pockmarks" during use, causing the mold to reach the life ahead of time, and it must have good oxidation resistance and high temperature fatigue strength under high machine speed

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