Tapered components

Component heating or the use of slow-curing adhesives will solve most of the assembly problems of very large interference fitted parts. Another satisfactory approach is to use tapered components. 

A further drawback of this construction is that it is not convenient to have a taper outlet slot on a container so the practice is to slope the feeder casing from the screw diameter to a parallel hopper outlet size that matches the largest diameter of the screw. All most invariably, this results in a casing wall inclination at the smaller end of the feeder that is inadequate for product slip. In combination with the gap at the side of the screw to the casing wall that fills with static product and opposes wall, the effect is to create a narrow flow channel with non-mass flow characteristics. The economics of manufacture also detract from widespread adoption of this technique as both the screw and the casing have taper components that demand extra fabrication time. 

Screws into the female thread in the fitting or hydraulic component. This thread also is tapered. 

Undercut Whether external or internal, undercuts should be avoided if possible to reduce mold cost (by about 25 to 30%) and simplify melt flow during molding. However many molds use external and/or internal undercuts. In cases where it is essential to incorporate them in a design, appropriate mold design is required. The mold will include action such as sliding components on tapered surfaces, split cavity cam actions to produce the needed undercut, etc. (Chapter 8, TOOLING)... 

Tapered plates, prepared with a gradual increase in thiclcness of the layer from 0.3 nm to 1.7 am, can be used to improve resolution of the sample [215]. On the tapered layer the solvent front velocity decreases as the thickness of the layer increases. This results in the formation of a negative velocity gradient in the direction of solvent migration. As a result the lower portion of a zone moves faster than the top portion, keeping each component focused as a narrow band. Plates with concentrating zones are useful for optimizing sample application. 

Fig. 13.6 Optics of radiation losses in a MF taper, which shows the splitting of the guiding and radiating components of the propagating electromagnetic field near focal circumferences...

If the external surfaces of the pipe components are not aligned, the weld shall be tapered between them. 

Fig. GR-3.4.3(e) Unequal Pipe Component Thicknesses, Thicker Components Taper-Bored to Align... 

For components that will operate in pipelines (Part PL) at hoop stresses of 20% or more than the SMYS, and for all components in piping (Part IP), if the nominal wall thickness of the adjoining ends does not vary more than 2.4 mm (%2 in-)/ no special treatment is necessary, provided the joint design meets the requirement of the WPS. Where the nominal internal offset is more than 2.4 mm (%2 in.) and there is no access to the inside of the pipe for welding, the transition shall be made by a taper cut on the inside end of the thicker section. The taper angle shall not be greater than 30 deg. 

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