Production technology of soft and hard layer sound insulating pad of automobile

Abstract

The invention relates to a production technology of a soft and hard layer sound insulating pad of an automobile, belonging to the technical field of automobile interior component manufacture. The sound insulating pad is hot-formed for one time by letting a soft layer fibrofelt, a film and a hard layer fibrofelt be subject to steam heating, wherein, the steps of the method comprise paving the raw materials, carrying out hot forming, molding through adsorption, and cutting with water. The technology reduces production procedures, greatly increases production efficiency, can well control the thicknesses of the soft layer and hard layer. According to the invention, steam has strong penetrating force and good effect of heat transfer, thus the film is completely molten, and the soft and hard layers are bonded firmly. The prepared sound insulating pad of the automobile has good sound insulation performance, and can well satisfy the using requirements of clients.

Description

Technical field [0001] The invention specifically relates to a production process of a soft and hard layer sound insulation pad for automobiles with high production efficiency and firm bonding between the soft and hard layers, and belongs to the technical field of automobile interior parts manufacturing. Background technique [0002] Automobile soft and hard layer sound insulation pad is made of soft layer fiber felt, film and hard layer fiber felt. Based on the material composition of the soft and hard layers of fiber felt, the traditional process often uses the method of first drying and then cold pressing to produce sound insulation pads. There are a series of shortcomings: many steps, long drying time and cold pressing time, low production efficiency; The thickness of the layered fiber mat changes greatly during the drying temperature process, which affects the sound insulation performance of the product; the dried fiber mat is easily deformed during the conveying process to...

AI Technical Summary

Problems solved by technology

Based on the material composition of soft and hard fiber mats, the traditional process often adopts the method of first drying and then cold pressing to produce sound insulation mats, which has a series of disadvantages: many steps, long drying time and cold pressing time, and low production efficiency; The thickness of the layered fiber mat changes greatly during the drying process, which affects the sound insulation performance of the product; the baked fiber mat is easily deformed during transportation to the cold mold; the heat dissipation during the film laying process is too fast, resulting in the film not being completely melted, soft, The hard layer is not firmly pasted, it is easy to take off

These shortcomings seriously affect the performance of automobile soft and hard layer sound insulation pads, and hinder the development of automobile sound insulation pads. Therefore, it is of great significance to study the new production process of automobile soft and hard layer sound insulation pads.