Why is the black roof expensive? Because it is more complicated to spray.-Sichuan Changyi Industrial Co., Ltd.

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Why is the black roof expensive? Because it is more complicated to spray.

Release time:

2023-08-23

Now there are many cars with black roofs on the market, which are liked by young people. After the car has a black roof, it adds a sense of movement. Look black and white strong contrast, the visual effect is good. Black roofs have strengths and weaknesses.

Now there are many cars with black roofs on the market, which are liked by young people. After the car has a black roof, it adds a sense of movement. Look.Strong contrast between black and whiteThe visual effect is good. Black roofs have strengths and weaknesses.

Strengths: The black roof and the white body are mixed together, and it looks likeSporty and full of character.. Defects: Black roof, in summer, the temperature inside the car is higher than white roof. Since black is absorbing light, white is reflecting light. There are generally two kinds of black roofs that we can see, one is the black roof that comes with the factory, and the other is modified by later film. As for the later modification of film sticking, some people will ask, if the film sticking method is chosen, will the car fail the annual examination after the black top sticking? Will the police catch you and deduct points? In fact, if the film sticking area does not exceed 30% of the whole car body (excluding the window part), it is not required to deposit the case in the DMV. However, the roof area does not exceed 30%, so under normal circumstances, it is safe to stick to the black roof. The black roof with its own spray is the main topic of this article. If you know a little about the coating process, you will know the general non-black roof process, and the black roof process repeats the process of intermediate coating, color paint and varnish on its basis,

Its detailed process is as follows:

The whole body is over-electrophoresed, the whole body is over-coated, only the outer panel of the top cover is sprayed with black paint, varnish, dry the roof, and cover the whole body. Spray the normal body color. In brief, the top cover is painted black first, and then go to the cover line. Cover the top cover with tape, and then spray the normal color. The following figure shows the attitude of the black roof covering line in the painting workshop. The operator stands on the high platform and covers the roof with adhesive tape:

As can be seen from the above, the cost of black roof is higher than that of ordinary single color cars. First of all, the cost of a single branch line equipment and personnel is the cost. JPH(Job per Hour) of other factories is also affected. As the same car is coated with varnish twice, it is equivalent to reducing the production rhythm. That is to say, if the design beat of the painting workshop of a factory is 30JPH, if only monochrome cars are produced, 30 cars can be offline per hour, but if there is a certain number of black roof cars, then the output of 30 cars per hour cannot be completed, and the detailed output demand is determined according to the number of black roof cars.

In addition, there is a small attention point about the covering line. Since the high platform is not adjustable (of course, it is possible to design an adjustable high platform, but the cost is too high), we 'd better not produce cars with very different heights in the same painting workshop and all need to make black roofs. For example, cars with black roofs and SUV are produced together. As a result, operators need to cover the film at an inappropriate height, it has a negative impact on the final quality and inspection work.

Sichuan Dingxiang Green Building has an annual production capacity of 400000 cubic meters of high precision AAC blocks and ALC plates, and is equipped with an annual production line of 60000 tons of special binder and interface agent and an annual production line of 40 million tons of autoclaved brick. Committed to providing customers with wall materials one-stop service.

Business scope: R & D, production and sales of prefabricated building wallboard materials, new wall and roofing materials; R & D, production and sales of autoclaved aerated concrete blocks and plates; R & D, production and sales of dry mixed mortar products and autoclaved fly ash brick series products; R & D, production and sales of special tools and accessories for construction; labor subcontracting of construction engineering; Construction engineering technical consulting services.

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