STRIPPER PLATE AND VALVE EJECTION.

Stripper Plate Ejection
Stripper plate systems are very effective and usually more efficient than pins wherever they can be used as they support the maximum area possible during ejection (Figure 10.5).
Typical applications are for tubular parts and circular, square or rectangular boxes. Stripper plate systems are also often used in conjunction with other forms of ejection. They are used with pins, sleeves and blade ejection, and sometimes with compressed air.

Valve Ejection
This ejector is used to provide a large area of support that is particularly useful for supporting the top surfaces of thin-walled boxes. Such components, especially those in brittle materials, can be prone to breakage if not supported in this way.
Valve ejection is also useful for releasing a vacuum in enclosed components such as boxes. Examples of the use of valve ejectors are shown below.