Stripping materials

If air is used as stripping agent, further treatment of the stripped material will be necessary. The gas might be fed to an incinerator or some attempt made to recover material by use of adsorption. 

Bending. The smallest radius over which strip of a particular alloy can be formed without failing is important in the selection of materials for a given appHcation. The industry tests formabiHty using samples cut from strip material to rank materials and thereby indicate whether a particular alloy/temper is suited for an appHcation (15). Performance of the material in actual stamping is the best final judge of suitabiHty. 

The form of or act of laying strip material taken off a mill or extruder into a basket in an oscillating manner. Such material is then suitable for subsequent automatic feeding of production equipment such as injection moulding machines. Wild Rubber... 

Eliminate Product Frills and Frivolous Products Packaging engineers in recent years have contributed tremendously to waste creation. A substantial portion of household and restaurant wastes, for example, consist of packaging and stripping materials. The marketplace is full of junk merchandise Safely Transport Products... 

We have used both the commercial crude and stripped materials without further purification in tests of relative antioxidant effectiveness because they effectively simulate two different food exposures of phosphatide. The crude material simulates a typical emulsified oil (35% triglyceride), as in a baking shortening, while the stripped powder in microdispersion (3-5% triglyceride) is an approximate membrane model (25). 

Apply the stripped material to a preparative RP-8 HPLC column using a 5-10 mL loop (see Note 18). 

Fig. 22 is a vieM of a dce arranged for the production of a metal plate, as at a, from strip material of the required width. 

The shield has a strippable outer layer formed by a coextrusion of 20% strip material and 50% standard semi-conductive material. 

Solid material that is heated in industrial furnaces is not necessarily continuous. Very often, the charge consists of coiled strip material or separate pieces piled to various depths or close side by side. In such cases, heat only can fiow from one piece to the adjacent piece through small contact points on their surfaces, or through gas-filled spaces—the thermal conductivity of which is very small. A pile of crankshafts is an example of low overall conductance, but high-velocity burners may be able to blow some gases between the pieces. 

An innovative application is represented by stretch leveling of complete coUs for balancing strains along the total width and thickness. New systems are designed so that the gripper system does not leave impressions in the material. The result is an extremely flat, low-tension strip material. Strip thicknesses of up to 8 mm and strip width of up to 2,100 mm can be leveled (Henrich 2004). 

When parts are to be blanked from strip material, it is essential that the blank is arranged within the strip to gain the greatest economical use of the material by minimising the amount of scrap produced. The final layout will determine the width of strip, which in turn determines the general design and dimensions of the press tool. 

Explain the importance of the layout of blanks in strip material used in the blanking and piercing process. 

Keep in mind that the total gibbing clearances will vary by type of gib, wear strip material, and speed of slide and type of lubrication used, with grease requiring an extra 0.001-in. clearance. If you cannot get the gibs to tighten up within the 0.005-in. tolerance, you will need some slide and gib repairs to get reduced clearances. 

Fig. 3.1-61 Comparison of softening curves for cast and hot-rolled A199.5 and AlMnl strip material cold-worked 90% and annealed for 1 h at the temperature shown [1.36] (1) Cast and hot-rolled AIMnl (3103) strip (2) Cast and hot-rolled A199.5 (1050A) strip (3) RecrystaUization range...

A table for selecting wear strip materials is provided later in this chapter. The conveyor designer should study the catalogs and engineering manuals of an ACA flat-top chain manufacturer for more help in selecting wear strips. 

Carbon and alloy steel flat-top chains are not well suited to corrosive conditions. However, there are flat-top chains made from materials for use outdoors, in wet conditions, or in some corrosive chemicals. See Table 12-2 for chain and wear strip materials when the conveyor must work in corrosive chemicals. Consult an ACA flat-top chain manufacturer for help in selecting chain or wear strip materials for corrosive chemicals not listed in Table 12-2. 

Select the wear strip material from Table 124. Here again, the table gives only general information about wear strip materials. The designer should contact an ACA flat-top chain manufacturer for more detailed information on selecting wear strip materials. 

Wear strip material Present Absent Present Absent Present Absent... 

From Table 12-4, UHMWPE is selected for the wear strip material. Nylon was not selected because it absorbs water. Stainless steel was not selected because it is more costly and difficult to work with. 

With chain material of regular acetal, wear strip material of UHMWPE, a comer angle of 90 degrees, and well-lubricated operation, the comer factor from Table 12-7 is 1.20. 

---