High polymer hot-press mold with changeable cavity and use method thereof

Abstract

The invention discloses a high polymer hot-press mold with a changeable cavity and a use method thereof. The high polymer hot-press mold with the changeable cavity comprises an upper male mold (1), a female mold (2) and a lower male mold (6), and is characterized in that the entire hot-press mold is a cuboid; the upper male mold (1) and the lower male mole (6) are cuboid bosses; the cross section of the inner cavity of the female mold (2) is in a rectangular shape, the upper part of the cavity is provided with a rectangular groove precisely matched with the boss of the upper male mold (1), and the lower part of the cavity of the female mold (2) is precisely matched with the boss of the lower male mold (6); and the cavity of the female mold (2) is internally accommodated with a changeable cavity assembly formed by a female mold cavity base plate (5), a short cavity pate (3) and a long cavity plate (4). The invention realizes the changeability of the cavity of the high polymer hot-press mold, can produce multiple parallel test samples the dimensions of which satisfy multiple national standards for material mechanical property detection at the same time, and has the advantages of time and labor saving and lowers test sample manufacturing cost.

Description

technical field [0001] The present invention relates to a mold and its use method, in particular, it is a variable-cavity hot-pressing mold used for high polymer and composite materials to meet the requirements of making parallel specimens for different mechanical property tests and its use method , belongs to the technical field of material forming. technical background [0002] At present, most hot pressing molds are provided with a female mold cavity on the female mold, and then an upper male mold is arranged on the upper part of the female mold cavity, and a lower male mold is arranged on the lower part, and the upper male mold and the lower male mold face each other in the female mold cavity. The movement makes the material in the cavity of the female mold shape, and the prepared sample has a single size. For structural polymers and their composite materials, mechanical performance testing is necessary. According to national standards for testing mechanical properties ...

AI Technical Summary

Problems solved by technology

[0002] At present, most hot pressing molds are provided with a female mold cavity on the female mold, and then an upper male mold is arranged on the upper part of the female mold cavity, and a lower male mold is arranged on the lower part, and the upper male mold and the lower male mold face each other in the female mold cavity. Movement, so that the material in the cavity of the female mold is formed, and the sample size prepared is single

For structural polymers and their composite materials, mechanical performance testing is necessary. According to national standards for testing mechanical properties of such materials, such as tensile (GB3354-82 and GB3355-82), bending (GB3356-82) , compression (GB1448-83), shear (GB3357-82) and impact toughness (GB1451-83), it can be seen that the size of each test sample varies greatly, and it usually takes a lot of time and money to manufacture hot pressing Mold and production of parallel samples; moreover, because the process conditions of each production will inevitably be different, it is difficult to ensure that the samples produced each time are the same, which will bring errors to the test results

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