The cap of the capping machine is produced by the same manufacturer and the plastic bottle cap produced by the same production site. The shape of the compression curve (load-displacement curve) is basically the same, that is, the reproducibility of the curve is very good, and the compression performance parameters are basically the same; The shape of the compression curve is quite different between the manufacturer or the plastic bottle cap produced by the same manufacturer and different production sites, and the compression performance parameters are also different. Therefore, the plastic bottle cap compression performance parameters and compression curve have certain characteristics, which can be used as a reference for identification. Although the same kind of caps have certain differences in material formulation, melt temperature, molding method, mold shape and production process parameters, and sometimes human factors in the process will cause a full error, but overall, This does not have a large impact on the shape of the curve and the compression performance.
The effect of the experimental speed of the capping machine on the compression performance of the plastic cap: the speed is different, the compression performance is slightly changed, but the change is not large; the shape of the compression curve is not much different, basically the same.
The shape of the compression curve of the same type of plastic cap is very similar, and the plastic caps of different manufacturers have great differences in compression performance and compression curve, because each manufacturer's process formula, production process, mold The production equipment and molding methods are different, so the compression performance of the plastic bottle cap is naturally different. As one of the means to distinguish the authenticity of the plastic bottle cap, the compression performance and compression curve of the genuine plastic bottle cap can be measured first and used as a reference standard; then the plastic bottle cap to be tested for compression, compression performance and compression curve In contrast to the reference standard, the authenticity of the plastic bottle cap to be inspected can be discerned to identify the authenticity of the product.