Lesson 6 Glass Containers 第6课玻璃容器 o Glass Types and general properties ● Bottle manufacture o Bottle design Features
Lesson 6 Glass Containers 第6课 玻璃容器 ⚫ Glass Types and General Properties ⚫ Bottle Manufacture ⚫ Bottle Design Features
Glass Types and General Properties Definition and characters--an inorganic substance fused at high temperatures and cooled quickly o about the principle component---silica(quartz) The ingredients of the components and different formulations Other mineral compounds be used to achieve improved properties decolorizers-to clear; colorants-change the appearance Other glass types used for special packaging purposes lead compounds boron compounds borosilicate glasses The problems of different formulations include soda- lime and regular container glass are mixed when recycling
一. Glass Types and General Properties ⚫ Definition and characters-- an inorganic substance fused at high temperatures and cooled quickly ⚫ About the principle component ---silica (quartz), ⚫ The ingredients of the components and different formulations. ⚫ Other mineral compounds be used to achieve improved properties: decolorizers – to clear; colorants– change the appearance… ⚫ Other glass types used for special packaging purposes. lead compounds, boron compounds, borosilicate glasses… ⚫ The problems of different formulations include soda-lime and regular container glass are mixed when recycling
Glass Types and General Properties Advantages as a packaging materia: o inert to most chemicals perfect foods container mpermeability clarity perceived image rigidity stable at high temperatures Disadvantages breakability; high weight; high energy costs
一. Glass Types and General Properties Advantages as a packaging material: ⚫ inert to most chemicals ⚫ perfect foods container. ⚫ impermeability ⚫ clarity ⚫ perceived image ⚫ rigidity ⚫ stable at high temperatures Disadvantages : breakability; high weight; high energy costs
二。 Bottle manufacture 1. Blowing the Bottle or Jar Process: blow-and-blow,"press-and-blow two molds: blank mold forms the neck and the initial shape blow mold produce the final shape a blank mold comes in a number of sections finish section cavity section(made in two hal ves to allow parison removal) a guide or funnel for inserting the gob a seal for the gob opening once the gob is settled in the mold blowing tubes through the gob and neck openings
二. Bottle Manufacture 1. Blowing the Bottle or Jar ⚫ Process: "blow-and-blow”; "press-and-blow" ⚫ two molds: blank mold forms the neck and the initial shape blow mold produce the final shape ⚫ A blank mold comes in a number of sections: finish section cavity section (made in two halves to allow parison removal) a guide or funnel for inserting the gob a seal for the gob opening once the gob is settled in the mold blowing tubes through the gob and neck openings
Bottle Manufacture Gobs ---to form blank mold Molten glass flows depending on the bottle size Mechanical shears snip off"gobs of molten glass. Each makes one container Falling gob is caught by spout and directed to blank molds Mass-production is made up of several individual sections each is an independent unit holding a set of bottle-making molds. Large bottles consists of a blank mold and a blow mold Figure 6.1 Furnace draw-off orifice Higher production using double or and gob shears triple gobs on one machine. two or three blank molds and similar blow molds
二. Bottle Manufacture Figure 6.1 Furnace draw-off orifice and gob shears ⚫ Molten glass flows depending on the bottle size. ⚫ Mechanical shears snip off "gobs" of molten glass. Each makes one container. ⚫ Falling gob is caught by spout and directed to blank molds. ⚫ Mass-production is made up of several individual sections, each is an independent unit holding a set of bottle-making molds. ⚫ Large bottles consists of a blank mold and a blow mold. ⚫ Higher production using double or triple gobs on one machine. two or three blank molds and similar blow molds. Gobs ---to form blank mold