Assembly/joining

Integration of functions to reduce the number of parts and minimize the costs of materials, processing, finishing, assembly/joining and intermediate storage. 

Percussion Detonator, 15-Second Delay, M1A2 (MlEl) (Fig 69) consists of a firing pin assembly joined to a delay housing and percussion primer holding assembly (Ref 53, pp 35 37, Fig 31)... 

Macro-diisocyanates based on the reaction of an excess of 2,4-toluene diisocyanate with different poly(dimethylsiloxane)diols of different lengths have been prepared by Nikolaev et al. [71]. These macro-diisocyanates were reacted with 2 in stoichiometric proportions and the resulting adduct (22) was cured with a commercial epoxy resin in the presence of what was termed poly(ethylene)-poly(amine) at room temp-cerature, 80, and 100°C. The mechanical and thermal properties of steel-to-steel assemblies joined by these adhesives were better than those obtained using more common binders. 

Assemblies joined with cyanoacrylate adhesives exhibit good long-term durability, particularly when the materials are somewhat flexible, such as rubbers and most plastics (see Fig. 7). Bonded lap shear specimens have been aged outdoors for 7 years with good retention of strength (see Table 8). 

Different methods are used for assembling, joining, or finishing RP to RP products as well as RP to other materials. It is important to both... 

Reduction of the number of product components, usually achieved by combining functions. Typical examples include box and cover assemblies joined with live hinges, the use of self-tapping screws to eliminate nuts, and staking of molded plastic bosses instead of metal rivets or screws. 

Table 7.10 Initial bond strength of assemblies joined by PU adhesive modified by silane additives ...

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