Novel vehicle roof and production process thereof

Abstract

The invention provides a novel vehicle roof, which is formed by sequentially combining a composite knitted fabric, a fiberglass mat, a foam plate, another fiberglass mat and a bottom-layer non-woven fabric from top to bottom by adhesive films. The invention also provides a process for producing the novel vehicle roof. According to the production process, the advantages of simple procedure, high production rate and the like of a dry forming process and the advantages of roof forming performance higher than that of the dry forming process, lightweight roof and the like of a wet forming process are combined, namely the production process is used for forming the novel vehicle roof under a dry condition in a wet forming way (namely a cold material and a hot die). The VOC (volatile organic compound) performance of the roof is weakened, and the NVH (noise vibration and harshness) performance of the roof is improved; the novel vehicle roof and the production process have the advantages of high product forming performance, lightweight product, capability of improving the production rate of the product, less environmental pollution and the like.

Description

technical field [0001] The invention relates to the technical field of automobile interior decoration, and in particular relates to a novel automobile roof and a production process thereof. Background technique [0002] With the development of the automobile industry, the NVH and VOC performance of the whole vehicle is getting more and more attention, and the requirements for the NVH and VOC performance of auto parts are also getting higher and higher. The car roof is the main sound-absorbing and sound-insulating component, which plays an important role; [0003] There are two main molding processes for automobile roof molding. One is dry molding, also known as hot material cold molding; the other is wet molding, which is divided into wet one-step molding and wet molding. Wet two-step molding process, wet molding process, also known as cold material hot molding method. [0004] The dry molding process, that is, the hot material cold molding process, mainly heats the PU comp...

AI Technical Summary

Problems solved by technology

[0008] The wet forming process currently has the following disadvantages 1. It has great environmental pollution: since the glue used is in liquid state and is dangerous chemicals, it has great environmental pollution, and it needs to spray a release agent in the process, and it needs to use chemical glue in the later stage. The cleaning agent (such as DMF cleaning agent) cleans the mold, causing serious pollution and injury to the production environment and the production staff; 2. Higher requirements for equipment: the current PU foam board gluing process is glued by roller gluing machine, ensuring The thickness of the foam board must be consistent while ensuring the accuracy of the equipment. The uneven thickness of the PU foam board can easily cause uneven product strength and affect product rigidity; 3. Low production cycle: the wet two-step molding process needs to be divided into four processes (skeleton forming, glue spray compounding, water cutting and post-processing), during which it is necessary to spray release agent and spray gun maintenance and cleaning, resulting in a long production cycle of the product, and there are many changes, and the product qualification rate cannot be guaranteed.

4. Volatilization of toxic and harmful substances in the product: due to the volatilization of a large amount of benzene substances after the thermal reaction of the adhesive glue used in the wet forming process, which affects the VOC performance of the product; 5. The cost of product molding is relatively high: 1) Equipment maintenance costs are high: Due to the precision requirements of the gluing equipment (roller gluing machine) and the stability of the gluing robot spraying system, maintenance of the equipment is required, which indirectly increases the cost of the product; 2) The equipment needs to be cleaned before and after production, resulting in serious waste of raw materials , increase the production cost of the product

Images