Ticona has recently built the world's largest acetal production plant in Frankfurt with an annual production capacity of more than 300 million pounds (about 136,000 tons).
As the airport expansion required Ticona to relocate an existing acetal plant in Kelsterbach, Germany, the company decided to build the large-scale factory in Frankfurt. The factory began construction at the end of 2008 and eventually had about 1,200 employees. The Kelsterbach plant will be discontinued at the end of 2013.
Ticona is the world's largest acetal producer. The company is based in Dallas, California-based Celanese Corp. The company's engineering polymer business unit. Ticona employs more than 1,600 people and had sales of more than $1.1 billion in fiscal 2010.
In addition to the new plant in Frankfurt, Ticona is also building a 110-pound capacity factory in Jubail, Saudi Arabia, through a joint venture with Saudi Basic Industries. The plant is expected to be operational in 2013.
Acetals, thanks to their high mechanical strength and inherent lubricity, make them the materials of choice for gears and similar applications. The automotive market accounts for about 1/3 of global acetal demand. Some analysts believe that by the end of 2016, it is expected that the annual global acetal demand may be nearly 3 billion pounds. China's demand for acetal growth is particularly rapid, with an average increase of 14% since 2006. From now until 2016, China's annual demand for acetal is expected to reach 8%.
Plate rolling is a process of continuous three-point bending of sheet metal using a plate rolling machine. The equipment puts the sheet material between the upper and lower work rolls when rolling. The upper roller is raised and lowered vertically, and the two lower rollers rotate and move horizontally relative to the axis of the upper roller. When the upper roll descends, the plate is plastically deformed and bent between the upper and lower work rolls. The continuous rotation of the bottom roller drives the steel plate to advance and retreat through the friction between the plate and the roller to complete the coiling.
1. Pre-bending. When the plate is rolled, there is a length at both ends of the plate that does not bend because it does not touch the upper roller. It is called the remaining straight edge. In the process, the minimum force arm at which the plate starts to bend is called the theoretical remaining straight edge. The bending form (symmetrical bending, asymmetrical bending) is related.
2. Centering. The purpose of centering is to make the generatrix of the workpiece parallel to the roller axis to prevent skew.
3. Roll round. Rolling is the main process of product forming, which is divided into two types: one-time feed and multiple feeds. Multiple feeds are commonly used for rolling thick plates. The number of feeds depends on the technological constraints (such as the maximum allowable deformation during cold rolling) and equipment constraints (such as non-slip conditions and power conditions). When the rebound of the cold coil is significant, a certain amount of overcoiling must be added.
4. Straightening round. The purpose of rounding is to make the curvature of the entire circle as uniform as possible to ensure product quality. The general rounding process is divided into three steps:
(1) Load: According to experience or calculation, adjust the work roll to the position of the required maximum correction curvature.
(2) Rounding: Roll the roller 1 to 2 turns under the corrected curvature to make the entire curling rate uniform.
(3) Unloading: gradually unload the load, so that the workpiece is rolled several times under the gradually reduced correction load.
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