Lesson6GlassContainers第6课玻璃容器.pptVIP

Lesson 6 Glass Containers第6课 玻璃容器 Glass Types and General Properties Bottle Manufacture Bottle Design Features 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. 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 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 二. Bottle Manufacture 二. Bottle Manufacture Blow-and-blow process--- for narrow-necked bottles The two processes differ according to the parison producing. Blow-and-blow process: (Figure 6.2): 1. Gob dropped into the blank mold through a funnel-shaped guide (985°C) 2. parison bottomer replaced guide ;air blown into settle mold to force the finish section. At this point the bottle finish is complete. 3. Sol