陕西科技大学：《包装技术基础 Fundamentals of Packaging Technology》课程PPT教学课件（英文版）Lesson 5 Metal Containers 第5课 金属容器

Lesson 5 Metal Containers 第5课 金属容器

Lesson 5 Metal Containers 第5课 金属容器

Background Steel is one of the older packaging materials. - Originally used for round, square, and rectangular boxes and canisters. - The old-fashioned appearance of a fabricated metal box is effectively used to create nostalgia for specialty and gift-type containers. - Sanitary food can, hand-soldered cylindrical metal cans started in the early l800s. - Metal cans’ advantages:

Background Steel is one of the older packaging materials. - Originally used for round, square, and rectangular boxes and canisters. - The old-fashioned appearance of a fabricated metal box is effectively used to create nostalgia for specialty and gift-type containers. - Sanitary food can, hand-soldered cylindrical metal cans started in the early l800s. - Metal cans’ advantages:

Background being relatively inexpensive capable of being thermally processed rigid easy to process on high-speed lines readily recyclable total barrier to gas and light an important means of delivering a shelf-stable product - Food cans: three-piece construction (Figure 5.1)

Background being relatively inexpensive capable of being thermally processed rigid easy to process on high-speed lines readily recyclable total barrier to gas and light an important means of delivering a shelf-stable product - Food cans: three-piece construction (Figure 5.1)

Background Figure 5.1 Three-piece (left) and two-piece(right) can construction

Background Figure 5.1 Three-piece (left) and two-piece(right) can construction

Background Shallow drawn containers with friction or slip covers - Two-piece shallow drawn cans with double-seamed (folded) ends - Two-piece cans (Figure 5.1). reduced metal usage improved appearance elimination of a possible leakage location more elaborate tooling required - Deeper draws and multiple draws and draw-and-iron process -Impact-extrusion: tin, lead, and Al; collapsible tubes (nearly Al); heavier gauge aluminum extrusions used for pressurized aerosol containers

Background Shallow drawn containers with friction or slip covers - Two-piece shallow drawn cans with double-seamed (folded) ends - Two-piece cans (Figure 5.1). reduced metal usage improved appearance elimination of a possible leakage location more elaborate tooling required - Deeper draws and multiple draws and draw-and-iron process -Impact-extrusion: tin, lead, and Al; collapsible tubes (nearly Al); heavier gauge aluminum extrusions used for pressurized aerosol containers

Common Metal Container Shapes Three-piece steel sanitary food cans. ·Aerosol cans, made by two methods: (1) Three-piece steel cans with a welded body and two ends, and (2) one-piece, impact-extruded aluminum cans necked-in to accept the valve cup. ·Steel or aluminum two-piece drawn-and-ironed beverage cans. ·Two-piece steel or aluminum cans by drawing or by draw and redraw. Full-opening, ring pull-top cans Double-seamed, conventional-top cans ·Cans with hinged lids, usually steel

Common Metal Container Shapes Three-piece steel sanitary food cans. ·Aerosol cans, made by two methods: (1) Three-piece steel cans with a welded body and two ends, and (2) one-piece, impact-extruded aluminum cans necked-in to accept the valve cup. ·Steel or aluminum two-piece drawn-and-ironed beverage cans. ·Two-piece steel or aluminum cans by drawing or by draw and redraw. Full-opening, ring pull-top cans Double-seamed, conventional-top cans ·Cans with hinged lids, usually steel

Common Metal Container Shapes Flat round cans of drawn steel or aluminum with slipcovers (Figure 5.2) ·Three-piece steel or aluminum ovals, typically fitted with a dispensing spout (Figure 5.2) ·Traditional pear-shaped, three-piece steel ham cans ·Oblong steel three-piece F-style cans (Figure 5.2) ·Oblong key-opening cans, three-piece steel ·Multiple friction cans of three-piece steel, also referred to as double￾and triple-tight cans ·Three-piece, square-breasted steel cans Spice cans (smaller three-piece cans) with a perforated metal or plastic top · Industrial pails and drums ·Two-piece, low-profile steel or aluminum ovals, with full-opening ring pull-tops

Common Metal Container Shapes Flat round cans of drawn steel or aluminum with slipcovers (Figure 5.2) ·Three-piece steel or aluminum ovals, typically fitted with a dispensing spout (Figure 5.2) ·Traditional pear-shaped, three-piece steel ham cans ·Oblong steel three-piece F-style cans (Figure 5.2) ·Oblong key-opening cans, three-piece steel ·Multiple friction cans of three-piece steel, also referred to as double￾and triple-tight cans ·Three-piece, square-breasted steel cans Spice cans (smaller three-piece cans) with a perforated metal or plastic top · Industrial pails and drums ·Two-piece, low-profile steel or aluminum ovals, with full-opening ring pull-tops

Common Metal Container Shapes Figure 5.2 Examples of specialized can shapes

Common Metal Container Shapes Figure 5.2 Examples of specialized can shapes

Three-Piece Steel Cans Steel three-piece can bodies can be mechanically seamed, bonded with adhesive, welded, or soldered (Figure 5.3). - Aluminum cannot be soldered and cannot be welded economically. - Welded sanitary three-piece can bodies are therefore made exclusively of steel. - Mechanical seaming or clinching is used only for containers intended for dry product

Three-Piece Steel Cans Steel three-piece can bodies can be mechanically seamed, bonded with adhesive, welded, or soldered (Figure 5.3). - Aluminum cannot be soldered and cannot be welded economically. - Welded sanitary three-piece can bodies are therefore made exclusively of steel. - Mechanical seaming or clinching is used only for containers intended for dry product

Three-Piece Steel Cans Figure 5.3 Mechanical, welded, and adhesive-bonded side seams for three-piece cans

Three-Piece Steel Cans Figure 5.3 Mechanical, welded, and adhesive-bonded side seams for three-piece cans