oil processing in operation, the preform processed into the hopper, oil from the hopper into the press bore. Screw a screw to in advance by pressing, the preform is in running condition in the press the squeezing chamber, in the squeezing chamber under conditions of high pressure, friction force between the blank and many of the screw, the press bore. The main is to make the friction material blank and blank, resulting in relative motion. On the other hand, root diameter screw is gradually enlarged, when the screw motion, thread the preform can move forward and can be turned outwards, material layer and near the screw thread surface with the pressing shaft to rotate, so that the oil plant chamber in each blank particles are not equal with Fang Xiangyun. The particles also exist between the relative motion. There is friction heat and meet a heat required for oil of process operation, help to promote the protein thermal denaturation of billet, destruction of the colloid, increased the plastic, but also reduce the oil viscosity, easy to press out the oil, thus improving the oil press oil rate.
The hydraulic press is the oil pressure, oil press the oil pressure in static state.According to the power source pump has two types of manual and electric; byapplying pressure to the blank form can be divided into vertical and horizontal.Vertical hydraulic oil press (Figure 1) has 1 cylinder is fixed on the base, the cylinderwith cylindrical piston, piston upper part and pie plate are connected into a whole.Blank after pre pressed into a round cake, cake circle coat, with 20 ~ 40 round cakestacked between the pie plate and roof, bread and cake between separated by thinplate with holes, driving the piston top, pressure, oil press cake. Pumps stoppedpressing, pressing after the whereabouts of the piston, the cake unloading, reinstalled on the cake, so repeated intermittent oil, each pressing one of about 2 ~ 5 hours.
The electric pump can form a circulation oil system, control of several hydraulic press operations at the same time. Horizontal hydraulic press. The structure and workingprinciple and vertical is basically the same, the installation is convenient, the oil flow is smooth, cake circle does not accumulate oil; but covers an area of large, need a backpressing with the hammer, a pulley or a screw mechanism. Hydraulic press pressure,a high rate of oil, a few moving parts, convenient repair and maintenance; the labor intensity is big cake handling.
Oil production efficiency and capacity of technical and economic indexes of machineoil, is the preferred conditions on product evaluation of user. Only meet the pressprocess conditions, and continuous press 24 hours (at least one shift), in order to achieve good economic benefit. Determine the oil efficiency and production capacity,technical and economic indicators, is the mean value refers to the continuous work.So, when pressed to stop or only crush tens of kilograms, hundreds of kilograms ofoil, not to have the good economic benefits, but also not as evaluation of evidence.
It should be pointed out, some users use the "oil rate" (that is, per 100 kg of oil can besqueezed out of several kilograms of fat) concept, this is not scientific argument. How much oil, process, and raw material oil and the rate is related to the mode ofoperation. As a stereotypical screw press, mainly to ensure the oil extraction efficiencyand residual oil rate.
1. the operator
The main reasons are the unskilled, operation skills are not high, don't abide by the rules; be negligent, poor quality consciousness operation; personnel does not close;the effective use of the low rate of equipment.
The new machine while the quality inspection of the factory, but after the storage,handling, transportation, may cause damage. Especially the installation of improper adjustment, assembly quality is poor, not in the correct use and maintenance of safety operation procedures, will enable the machine can not function. Man-made repaircomplex troubleshooting, accident, directly affect the product quality and production capacity. The opening of the new machine, derusting, must be carried out on the press bore running, try pressing, try to raise the pressing chamber temperature in formal pressing, keeping the feed - the cake.
High quality raw materials containing impurities, lower level, will directly affect the oilproduction efficiency and capacity. For the harvest, exposure, transportation and storage process, the impurity band into organic impurities (such as plant stems and leaves, husks, grass, hemp rope,
A piece of cloth, paper and all kinds of grain, inorganic impurities such as dust, dirt,gravel, tile, etc.) and oily impurity (pest grain, grain and oilseed not dissimilar metal impurities (such), nails, screws, etc.) shall be cleaned, screening the use of machinery and equipment, and according to the practical application of pretreatment processprocess.
Processing environment, should meet the requirements of oil producing process.Prepare production tools and process the necessary (such as pre processing andreprocessing) equipment, to improve production efficiency, reduce the invalid labor,ensure the machining process