Detection method of molding porosity

Abstract

The invention discloses a detection method of a molding porosity. The method comprises the steps that: (1) a formula below is adopted; masses of a sample in air and in water are respectively measured in two times, and sample density is calculated, wherein m in air represents the mass of the sample measured in air, and .m in water represents the mass of the sample measured in water; (2) densities of a rubber and plastic material before and after molding are measured; and the porosity of the rubber and plastic material is calculated according to a formula below, wherein rho before molding represents the density of the sample before molding, and rho after molding represents the density of the sample after molding. Compared with prior arts, with the molding porosity detection method provided by the invention, rubber and plastic material porosity after molding can be rapidly and quantitatively detected. Therefore, the method has an important significance in controlling product quality. Because the rubber and plastic material is widely applied in industrial productions and daily lives, the method and a device for detecting material molding porosity have wide application scope.

Description

technical field The invention relates to the field of polymer material processing, in particular to a method for detecting forming porosity. Background technique At present, in the production process of rubber tires, the porosity of the rubber parts after extrusion molding is an important process control index, but how to accurately and conveniently measure the porosity after extrusion molding of rubber materials has always been a problem. A conundrum in the tire manufacturing industry. Since the porosity of the rubber after molding involves measuring the volume of the rubber before and after molding, and for the processing method of continuous feeding and discharging, it is inconvenient to measure the volume before and after molding, so the general method for measuring the porosity is There is no good method and device to accurately and conveniently measure the porosity of the rubber by experience or visually measuring the cross-section porosity with reference to standard ...

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Problems solved by technology

Looking at other polymer material processing industries, there i...