Monday, June 30, 2008
Saturday, June 28, 2008
The strengths of thermoforming are as follows:
. Parts have low internal stresses therefore good physical properties to work with.
. Lead time and mold changes are relatively short and easy to perform.
. Large part don't increase costs.
Suitable materials for use in vacuum forming are conventionally thermoplastics , the most common and easiest being High Impact Polystyrene Sheeting (HIPS). This is molded around a wood, structural foam or cast/machined aluminum mold and can form to almost any shape. Vacuum forming is also appropriate for transparent materials such as acrylic.
Tuesday, June 24, 2008
Monday, June 23, 2008
Tuesday, June 17, 2008
Monday, June 16, 2008
Tuesday, June 10, 2008
Monday, June 2, 2008
- A dense shiny fawn green (dead leaves are mixed in with fresh green ones) tussock -30 to 70cm tall
- Leaves tightly folded, leathery, smooth above, fringed with hairs along the margins below; tip sharp.
- Leaf sheath creamy brown, shiny, with rough margin.
- Ligule is leathery, very short and even.
- Flower heads (30-100cm) do not stand proud of leaves. Panicle is open, slender, rough, with twisted branches. Awns absent