Front spraying device for automobile sealing strip

Abstract

The invention provides a front spraying device for an automobile sealing strip. The front spraying device comprises a box body. A spraying channel is formed in the box body. An air exhaust mechanism communicates with the spraying channel. The front spraying device further comprises a spraying mechanism with a spraying gun. Two transfer parts capable of operating synchronously are arranged at an inlet and an outlet of the spraying channel separately. A plurality of rotary supporting parts are arranged in the spraying channel at intervals, and the distance between every two adjacent rotary supporting parts is 20-30cm. A constraining guide part capable of applying constraining force to guide the movement of a rubber tape of the sealing strip is arranged at the outlet of the spraying channel. According to the front spraying device for the automobile sealing strip disclosed by the invention, the rubber tape of the sealing strip can pass through the spraying channel according to a set position, the problem of scratching due to overturning in the passing process of the rubber tape of the sealing strip can be prevented, the problems of drooping accumulation and deformation happening to the rubber tape of the sealing strip due to excessively-large space between the rotary supporting parts can also be prevented, and therefore the effect that the soft rubber tape of the sealing strip passes through the spraying channel smoothly so as to complete a front spraying technology can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of production of automobile sealing strips, in particular to a pre-spraying device for automobile sealing strips. Background technique [0002] Sealing strips are commonly used on cars or SUV models, including glass woolen grooves, door frame sealing strips, rear door frame sealing strips, and some auxiliary parts of the cabin or door systems. Taking the structure of the automobile door frame sealing strip as an example, its main body is composed of sponge foam tube, compact rubber and core material. The sponge tube part needs to be sprayed with silicone or polyurethane coating during production to improve the noise reduction of the sealing strip , wear resistance, sealing and frost resistance, and can prevent pollution of sheet metal and beautify the appearance, etc. [0003] Most of the production processes of sealing strip products are extruder extrusion → product vulcanization → product cooling → produc...

AI Technical Summary

Problems solved by technology

[0006] The pre-spraying process adopts the method of spraying first and then vulcanizing. Although this process can solve the problems of long line body, high equipment investment and high energy consumption in the traditional process, because the product has not been vulcanized, the rubber product is soft and has no stiffness. It is easy to cause deformation and scratches. The deformation of the product means that the product is scrapped and the production cost increases. This problem is more likely to occur for the structure containing sponge foam tubes, especially the thin-walled door seals.

Therefore, the existing pre-spraying process can only be used for products with good stiffness such as glass grooves or door frame seals, which has become a major problem in the advancement of pre-spraying processes for products such as door seals.

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