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A kind of automobile noise and heat insulation pad and its production process

A production process and heat insulation pad technology, which is applied in the direction of layered products, vehicle parts, synthetic resin layered products, etc., can solve the problems of large investment in the production of sound insulation heat insulation pads, poor heat insulation effect, and low production efficiency. Achieve the effect of shortening heating time, stable size and improving production efficiency

Active Publication Date: 2017-11-24
YANTAI ZHENGHAI HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention mainly solves the problems of large production investment, non-environmental protection, poor heat insulation effect and low production efficiency of the existing sound insulation and heat insulation pads.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: automobile sound insulation and heat insulation pad, its production process comprises following two processing steps:

[0029] (1) Molding and punching: After installing the upper mold and lower mold of the molding punching die on a 300-500-ton molding press; use EVA as the base material, and the front of the base material is compounded with 18g / m2 White non-woven fabric, compounded with 40g / m2 PE film on the back; suck the base material with a suction cup, send it to the heating zone of the first-class ceramic far-infrared heating oven, and radiate the material. The temperature of the upper and lower heating zones is 280°C, the heating time is 70S; after the heating time of the substrate in the primary heating zone is up, the substrate is sent to the secondary ceramic far-infrared heating oven heating zone, where the temperature of the upper and lower heating zones is 280°C, and the heating time is 100S At the same time, the hot-melt felt material is nail...

Embodiment 2

[0031] Embodiment 2, with embodiment 1, difference is, adopt EPDM as base material, the front of base material is compounded with 35g / m2 black non-woven fabric, and the back side is compounded with 60g / m2 PE adhesive film; And punching, the temperature of the upper and lower heating zones of the heating zone of the primary oven is 380°C, and the heating time is 50S; the temperature of the upper and lower heating zones of the heating zone of the secondary oven is 380°C, and the heating time is 80S; the internal water circulation system of the mold The temperature of the cooling water is 15°C, the holding pressure of the press is 140bar, and the holding time is 45S; the cutting speed of the water jet is 450mm / s, the pressure of the high-pressure water generator is 3500bar, the pressure of the compressed air is 0.7MPa, and the vacuum adsorption negative pressure -2.0 KPa, the cutting angle is perpendicular to the product surface.

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Abstract

The invention discloses a sound insulation and heat insulation pad of an automobile. A production process of the sound insulation and heat insulation pad of the automobile includes the steps that a base material is heated at high temperature through a two-stage oven, hot-melting felt is heated at high temperature through a one-stage oven, the heated base material and the heated hot-melting felt are continuously put into a mould to be subjected to compression moulding forming together, meanwhile, punching of part of holes is completed, and then a semi-finished product is obtained, wherein the high temperature is 280-380 DEG C; the semi-finished product is cut through a water jet cutter to form the needed product. Production efficiency is improved, the fund input of mould equipment is lowered, product stability and uniformity are improved, safety and environmental friendliness are achieved as no solvent adhesive is used, the rejection rate and production cost are lowered, and the sound absorption, sound insulation and heat insulation properties are excellent.

Description

Technical field: [0001] The invention relates to the technical field of processing and production of vehicle interior decoration products, in particular to an automobile sound insulation and heat insulation pad and a production process thereof. Background technique: [0002] Car sound insulation and heat insulation pads are generally installed in the engine compartment and passenger compartment to play the role of sound absorption, sound insulation and heat insulation. Parts supporting companies have also put forward challenging requirements to meet the performance, quality and cost requirements of OEMs. [0003] The main material composition and molding process of the existing automobile sound insulation and heat insulation pads are as follows, and the shortcomings of each are as follows: [0004] (1) EVA+PU foaming, in which the EVA substrate is plastic-absorbed, and the PU foaming is divided into two types: open mold foaming or closed mold foaming. The disadvantage of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/12B60R13/08
CPCB32B27/12B32B2250/02B32B2262/0276B32B2262/062B32B2307/102B32B2307/304B32B2307/734B32B2605/003B60R13/0815B60R13/0838
Inventor 刘娟张磊王磊陈磊胡振涛
Owner YANTAI ZHENGHAI HIGH TECH
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