The press is used as a pre-press of the press machine is a large pressure to the oil pre-press, the pre-press the billet into the press after the press or continue to use the leaching method to take oil. So its import and export of the press volume of the larger changes in the volume, production capacity is also larger.
The screw press is a machine in which the blank is continuously advanced in the press chamber and the crude oil is squeezed under dynamic squeezing. In addition to the hopper, the press chamber is the main part of the operation, by a squeeze screw and cylinder squeeze cage composition. There are two types of single-stage press and two-stage press, single-stage only one horizontal press chamber, two-stage plus a straight press to carry out the first level press. The squeeze shaft consists of a number of crimps and loops on the shaft.
Each screw has a certain pitch and screw depth, and a shaft on the pitch of the screw from the feed to the discharge port gradually shortened, the screw gradually become shallow, so that the volume of the press from the import to the export gradually To reduce the billet into the press after the squeeze screw thread level to the exit, the pressure gradually increased, so the oil will be squeezed out. Cylindrical squeeze crates and squeeze the installation of the gasket to form a gap between the oil, squeezed out of the oil that is through the gap.
The large squeegee press is also equipped with scraper, scraper deep in the press chamber, aimed at each circle, to prevent the blank in the press chamber sliding, and to prevent the billet, and to adjust the cake thickness, Thereby correspondingly controlling the pressure of the press chamber and reducing the residual oil rate. In addition, the machine also has a smooth surface of the cake, etc., and often accompanied by steamed wok, can make the oil steaming and pressing continuously.
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