Hot pressing and forming mold of PP and PET two-component non-woven fabric sound insulation cotton

Abstract

The invention relates to a hot pressing and forming mold of PP and PET two-component non-woven fabric sound insulation cotton. The hot pressing and forming mold comprises a base, and the base is marked with a circular dividing line for mounting a sheet material; the sheet material comprises a rectangular first pressing plate and a strip-shaped second pressing plate for injecting PP and PET two-component test materials; the length of the first pressing plate is 652mm; the width of the first pressing plate is 452mm; the total length of the second pressing plate is 770mm; the width of the secondpressing plate is 422mm; the second pressing plate comprises a first limit plate, a second limit plate, and a third limit plate; the distance between the side of the first pressing plate and the sideof the first limit plate is l1, and l1 = 30 mm; the distance between the side of the first limit plate and the side of the second limit plate is l2, and l2 = 41.5 mm; the distance between the side ofthe second limit plate and the side of the third limit plate is l3, and l3 = 41.5 mm; and the distance between the side of the third limit plate and the side of the first pressing plate is l4, and l4= 30mm. The hot pressing and forming mold can reduce input of the labor cost, and greatly improve the production efficiency.

Description

technical field [0001] The invention relates to the field of producing sound-insulating cotton, in particular to a heat-press forming mold of PP and PET two-component non-woven fabric sound-insulating cotton. Background technique [0002] Sound insulation cotton is often used as an auxiliary sound insulation material in sound insulation projects. In fact, the original function of sound insulation cotton is to absorb and reduce noise. Using it can make sound insulation materials play a better role. The structure and sound insulation principle of sound insulation cotton are as follows: [0003] The shape of the sound insulation cotton is uneven, and there are a large number of small holes inside the sound insulation cotton. These tiny pores are interconnected and directly pass through the surface of the material. When the sound wave is incident on the surface of this open-porous material, part of the sound wave will penetrate into the material. Inside, part of the sound wave ...

AI Technical Summary

Problems solved by technology

[0006] 1. PP (polypropylene) has excellent electrical insulation properties and good chemical stability, and is easy to process and form, but PP also has disadvantages such as low-temperature brittleness, low mechanical strength and hardness, and large molding shrinkage

[0007] 2. PET (polyethylene terephthalate) has excellent properties such as wear resistance, heat resistance, good electrical insulation and chemical resistance. However, due to the relatively high glass transition temperature and melting point of PET, at normal processing temperatures, Slow crystallization rate, poor impact toughness

[0008] 3. The production efficiency is low due to manual sewing and hemming, and the operator can only complete the hemming of two sound-proof cottons within one hour

[0009] 4. The sound-absorbing and heat-insulating effect of the sound-proof cotton made of one-component reagent is poor

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