Expanded rubber volume elastic modulus testing and sample preparation apparatus, and method thereof

Abstract

The invention relates to the field of technologic test equipment, and especially relates to an expanded rubber volume elastic modulus testing and sample preparation apparatus, and a method thereof. The apparatus comprises: a metal cavity; a pressure head matched with the metal cavity to prepare an expanded rubber sample; a temperature control system used for controlling a heating coil to heat the metal cavity in the preparation of the expanded rubber sample, the volume expansion coefficient test and the thermal expansion pressure test; a metal gasket arranged above the expanded rubber sample in the volume expansion coefficient test and the thermal expansion pressure test; a displacement measurement device for measuring the change of the displacement of the metal gasket in the volume expansion coefficient test; and a load acquisition system for measuring the change of the expansion pressure of the expanded rubber sample in the thermal expansion stress test. The apparatus integrates the preparation of the expanded rubber sample with the measurement of the volume elastic modulus of the expanded rubber sample, ensures the rapid, convenient and accurate test of the volume elastic modulus, and provides the guarantee for the effective control of the quality of composite material products molded through a thermal expansion technology.

Description

technical field [0001] The invention relates to the field of process test equipment, in particular to a device for testing the bulk elastic modulus of expanded rubber and a sample preparation device thereof, and a test for the bulk elastic modulus of expanded rubber and a sample preparation method thereof. Background technique [0002] In order to meet the molding needs of complex closed components such as composite box-shaped parts, tubular parts and multi-cavity structures, the thermal expansion molding process has become one of the important research contents in the field of composite material manufacturing. The thermal expansion molding process refers to a molding method in which the composite material prepreg layup is pressurized and solidified through the thermal expansion of the core mold in a closed rigid female mold. This process usually uses a material with a large thermal expansion coefficient as the core mold, and a rigid material as the female mold. The composit...

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Problems solved by technology

[0003] Expansion rubber raw material manufacturers will provide corresponding parameters to guide the design of the mandrel to effectively control the molding pressure of the thermal expansion process. However, in the actual use of expansion rubber, fillers will be added according to the process needs. The type and quantity of fillers are uncertain, and the parameters provided by the manufacturer lose their guiding significance. , the process department can only realize the control of the thermal expansion pressure after multiple tests through the "trial and error method", resulting in a large waste of manpower, material resources, and financial resources; The sample preparation device and the testing device are independent of each other, and the dimensional error caused by the sample processing process will cause the sample to not match with the testing equipment, which will affect the accuracy of the test results

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