from the original type U to UV

Also specifically pointed out that because of the hard tungsten carbide coating, in the same corrugated stare blankly, tungsten carbide inserts carbide corrugated roll can do much steeper of the corrugated type, that is, from the original type U to UV, into a "V". In short is to reduce stare blankly tip arc, in corrugated core can significantly reduce the shrinkage rate of paper. To general AB double tile board, there were two core paper, reduced by 3% per side, each square board there will be a 6% reduction of profit margins. Machinery manufacturers, of course, they can provide us with less corrugated cardboard-box factory choice type of shrinkage, but buyers must consider to be clear about, because of the high different stare blankly, going a while at distance, sharp radian and different high, for flat crush strength of paperboard, molybdenum plating pressure strength and puncture strength all have different effect, must carefully choose a good equipment suppliers, joint of this plant commonly used corrugated base paper, consultation with the engineer, choose the most beneficial type corrugated tooth. Must avoid one-sided pursuit of the lowest corrugated shrinkage, silks is pointed the tooth shape, available and minimum corrugated core in the paper, in the process of forming silks, paper not molding, manufacturing medium pressure, is not worth the cost or consequences to improve core paper grades. Purchase price, our factory import tungsten carbide is less than $40000, 1600 x 305 is 2 ~ 3 times the price of domestic companies. But in the whole life to analysis: imported tungsten carbide corrugated roll is 35 million meters long, and domestic corrugated roll life span is only 8 million meters long, then a pair of imported tiles add a repair of the cost of the roller, is equal to two pairs of domestic corrugated roller work hardening time repair costs. Basically the same in price, but for the cardboard quality, imported tungsten carbide tile roll on corrugated stare blankly is high, the quality can maintain unity, and the domestic tile roll on new purchases or a new mill when can have the good quality of cardboard, but has the certain process is accelerated, corrugated stared blankly on the high side, wasted core paper shrinkage rate, increase the cost. Domestic corrugated roller run after 2 ~ 4 month tile roll wear, corrugated will become low, cardboard quality drop, influences the business growth. "