Secondary baking and heat pressing technique of heat pressing hemp fibre board for vehicle inner decoration

Abstract

The invention discloses a secondary baking and hot-pressing process for hot-pressing hemp fiber boards. Two conveying and receiving meshes which alternately input and output are arranged in a baking oven, the temperature of the baking oven is adjusted to be between 140 and 150 DEG C, and hemp fiber boards are placed on the conveying receiving meshes, are subjected to first baking and exit the baking oven to be cooled, and then are directly paved with fabrics and PVC skin for hot press after secondary baking. The invention is a secondary baking, the first baking is preheating, and the secondary baking is to ensure that the heat is easier to penetrate the hemp fiber boards, thereby ensuring that the hemp fiber boards can achieve the softening requirement of hot-pressing composite molding further to guarantee the composite bonding strength of the skin and the hemp fiber boards, reducing dense smoke and pungent odor produced by the hemp fiber boards after the baking further to improve thework environment, and avoiding the risk of burning the hemp fiber boards due to sharp fire baking; during the hot-pressing, a tension process of the fabrics and the PVC skin on a frame tooling can becanceled, and no defect of folds after the hot-pressing can not generate, thereby reducing one operation process.

Description

Secondary baking and hot pressing process of hot-pressed hemp fiberboard for automotive interior decoration technical field The invention belongs to the processing technology of automobile interior decoration materials, and specifically relates to a secondary baking and hot pressing process of hot-pressed hemp fiber boards for automobile interior decoration. Background technique At present, the traditional baking process of hot-pressed hemp fiberboard for automotive interiors is usually only once, the temperature is generally 170-180°C, and the baking time is 80-90 seconds. That is to use high baking power to soften the hemp fiber board in a short time, which is equivalent to rapid fire baking, so that only the surface of the hemp fiber board is softened, and the core of the board cannot be baked and is still in a hard state. For this reason, it will directly affect the quality and efficiency of the hot-pressing composite with fabric and PVC skin in the next step. What's ...

AI Technical Summary

Problems solved by technology

For this reason, it will directly affect the quality and efficiency of hot-pressing composite with fabric and PVC skin in the next step

What's more serious is that due to the inhomogeneity of the internal structure of the hemp fiber board, it is easy to cause local hemp fibers to burn in the state of rapid fire baking, resulting in a large amount of thick smoke and pungent smell at the volatile place, which permeates the entire production area and Pollution of the working environment, and because of the low ignition point of the hemp fiber, it is easy to cause the whole board to burn with an open flame

Generate a lot of waste, increasing production costs