This Friction Screw Press Down Stroke has been developed from best grade metal. This machine can also be suitable for producing naushadar bricks and head refractory. Swap 23 energizes the valve 17 to disconnect the pilot of a test valve 22 and introduces oil at a strain of a hundred atmospheres into the chambers 15 and 15′ of dynamic oil accumulators 14, 14′ which may be hydraulically linked to pistons 13, thirteen’ as shown in FIGS. The torlence of controlling vitality of Electric Screw Press industrial metal press is 0.2%, and the torlence of affect energy is only 1%. The small portions of oil operating off from the stress-limiting valves forty two and 43 and the 4-manner valve 41 during the reversing and in addition as leaked oil are fed back again into the closed circuit by a pump 45 driven by a motor 44. A spring-centered, pressure-managed three-manner valve 46 is provided in an effort to make sure the feed pressure required at the pump 27 and regulated by the stress-limiting valve 47. The three-manner valve forty six is actuated in such a approach that the respective low-pressure aspect of the closed circuit is related to the stress-limiting valve forty seven, the feed stress being maintained by the pump forty five. For cleaning and cooling the oil, the oil which has escaped from the circuit, is collected partly 32b of the tank 32, handed on after preliminary cleansing by sedimentation to part 32c of the tank 32, is fed by filters 50 and coolers fifty one by a pump 49 pushed by an electrical motor forty eight and is stored partially 32a of the tank 32. Subsequently, as an alternative of ending the first pressing with the value of the pressing, the amount of oil at excessive stress may be used. The electric screw press is pushed by permanent magnet synchronous servo motor,and encompass mechanical pats resembling framework, flywheel, screw nut, the slider, lubricating mechanism, braking mechanism and electrical components akin to servo motor, electric control cupboard, operating button station.
The torque to be applied necessitates correspondingly large and heavy motors which, aside from the fact that they have an unfavorable ratio of torque to second of inertia, result in the structural disadvantage that the spindle along with the flywheel and toothed rim have to be mounted axially non-displaceably within the upper cross member of the press frame and the spindle nut should be mounted within the slide of the press, and this leads to unfavorable exposure of the spindle to strain and torsion. The inclined portion 34 represents the second compression given by the motion of the pistons 2 and a pair of’, or the impact of the oil strain of the oil getting into by the valve fifty five, commanded by the pilot 56 which is pushed by a signal perform dependent on the position of the beam three during the down movement. The advantage of static strain sort press machine is its static pressure screw-nuts and the static pressure bearing. All the technical indicators and efficiency of the EPC-D electrical screw press produced by Qingdao Wantai Machine Instrument Technology Co. Ltd. No. 3,359,608, a primary and second compacting step have been carried out by a screw spindle, so that much of the pressing cycle time was consumed by the displacement of the screw spindle. 164 friction screw press machine merchandise are supplied on the market by suppliers on , of which punching machines accounts for 19%, hydraulic press accounts for 4%, and filter press gear accounts for 1%. A wide variety of friction screw press machine options can be found to you, There are 149 suppliers who sells friction screw press machine on , mainly situated in Asia. three. The pinions 23 are mounted in bearing blocks 24 that are supported by a platform 25 which surrounds the higher cross member three of the press body 1. Every pinion 23 is pushed by two axial piston motors, an axial piston motor 26o disposed above the pinion and an axial piston motor 26u disposed below the pinion 23. The width of the toothed rim 22 is such that through the full stroke of the spindle 9 executed by the toothed rim 22 the pinions 23 are always in complete engagement with the exterior toothing of the rim 22. Subsidy Loan Effectively as Screw Press forgingMachine Loan out there on all kind of Industrial Projects. 2, line 100 signifies the path of the beam 3 and the road one hundred and one the paths of the screw 7′ in the course of the step of placing the press 70 into operation. 7 presses the overall discharge line 51 of the hydraulic circuit. Screw presses, that are preferably used as drop-forging machines on account of their design advantages, are restricted of their affect drive by friction wheel drive (friction screw presses), and due to this fact screw presses with an affect power of from 40 MN (Meganewtons) are continuously provided, and screw presses with an influence of from eighty MN are usually provided, with a gearwheel drive, for which purpose the flywheel has external toothing and has motor-pushed pinions engaging in its toothed rim.
The invention pertains to a screw press having a flywheel rotationally related to the spindle by way of a friction coupling and a spindle displaceable axially in a nut mounted within the higher cross member of the press body, whereby the flywheel has external toothing to a width similar to the maximum press stroke plus the width of the driving pinion, a plurality of pinions participating in the mentioned toothed rim are each pushed by oil-hydraulic axial piston motors or by a pair of oil-hydraulic axial piston motors and the axial piston motors along with the pinions are disposed on a platform surrounding the higher cross member of the press body. three, lines 40 and forty one are representative of the screw stroke, and contours 30, 31, 31′, 33, 34, 35, 36 and 43 are representative of the stroke of beam three. In a excessive position 30 the beam 3 is supported by the pistons 9 and 9′ towards the adjustable plunger heads 6″ and 6′” of the pistons 6 and 6′. The power of the pistons 9 and 9′ is such that it exceeds the burden of the beam 3 and the pressure of the pistons 5 and 5′. This new construction relies on the refractory forming characters, which is our firm developed primarily based on SD20 Sequence Electric Screw Press for the refractory business. Shortly earlier than the top of the downward stroke of the spindle 9 the rotational pace of the pump 27 and therefore the rotational speed of the flywheel 17 and the spindle 9 are reduced to zero throughout the remainder of the stroke of the spindle 9. When the rotational speed is reduced the four-means valve 41 is displaced from the rest place to the proper and the road 42a is connected to a second pressure-limiting valve forty three. The pressure which can be regulated by the strain-limiting valve 43 limits, by the use of the stress-limiting valve forty two, the pressure present within the pipeline 31 to the braking pressure required for braking the flywheel 17. Regarding the present urgent machines, the number of strokes achieved between the washing phases of the moulds, is from 2 to 3 instances as great. For the reason that electric motors are twice accelerated from relaxation to the required rotational velocity and braked again throughout each working cycle, correspondingly excessive present heat losses are unavoidable and in addition the idle power absorbed by the motor is disadvantageous. Experimentally, with a urgent machine in accordance with the current invention, it might be noticed that the required power for the first urgent operation, with predetermined masses of ceramic, can be fairly low, roughly 10-12,000 kg., in opposition to the four hundred,000 Kg of the second pressing operations, which is quite completely different from the current pressing machines, which require about 50 to one hundred fifty tons for the first pressing step.
In accordance with the invention, there’s provided a flywheel and screw press for producing ceramic articles comprising, in combination, a base having an higher floor, a fixed head, help means supporting the mounted head in fixed place upwardly spaced from the upper floor of the base, a movable beam situated within the space between the upper surface and the mounted head and being guided on support means for motion toward and away from the upper floor, mildew means carried by the bottom and provided with cavities open upwardly for receiving a charge of ceramic powder material, punch means carried by the movable beam and designed to cooperate with the cavities for forming ceramic articles, a primary pair of hydraulic piston means carried by the bottom and supplied for imparting an upwardly directed thrust to the movable beam, a second pair of hydraulic piston means carried by the mounted head and provided for imparting a downwardly directed thrust to the movable beam, the first pair and the second pair of hydraulic piston means cooperating for controlling the downward stroke of the movable beam for imparting to the powder in the cavities a comfortable precompression causing a primary thickness reduction of the powder mass and an appreciable expulsion of the air enclosed therein, a third pair of hydraulic piston means carried by the mounted head and managed for performing on the movable beam and performing the primary compacting step after the soft precompression, a fourth pair of elastically compressible hydraulic piston means carried by the base and provided with adjustable rod ends and capable of interfere with the movable beam when the latter is further lowered in the course of the first compacting step for impressing to the movable beam an upwardly directed thrust serving to the elastic return of the compacted powder mass to boost the movable beam instantly after the primary compacting step, permitting the expulsion of the remaining air, a flywheel disposed above the fixed head, a screw threadably engaged to the flywheel and carried by the fastened head, motor means supplied for alternatively imparting to the flywheel and the screw rotation in a single and in the other path for reducing and raising the flywheel and screw, and control means for controlling the motor means to function the flywheel and screw within the lowering path in due time for impacting the movable beam and performing a strong second and ultimate compacting step of the powder material instantly after the elastic return of the powder material, and hydraulic circuit means for timely controlling and driving all the pairs of the hydraulic piston means, the hydraulic circuit means interconnecting the entire pairs of the hydraulic piston means.
Enterprise Profile : Jinan Linteng Forging Equipment Co., Ltd. Get info of suppliers, producers, exporters, merchants of Friction Screw Press for buying in India. Indeed, within the first compacting step, the flywheel had to be thrown at excessive velocity to scale back the time of its vertical stroke and in addition, instantly braked earlier than the impression to reduce its strain. The invention, nonetheless, isn’t restricted to those axial piston machines, but appropriate oil pumps and oil motors of other design will also be used. Although the advantage, of lowered cost and better reliability are achieved at the price of the next electric motor drive capability, for the reason that substantial load compensation made doable by the hydraulic accumulator within the case of the earlier type of drive with a central oil provide is absent, the electrical disadvantages (specifically high load peaks, additional installations for limiting them, idle power of the motors) and the structural disadvantage of the spindle bearing in the case of a purely electrical drive are avoided, and with respect to the operational reliability in the case of the oil-hydraulic drive any disadvantage due to provision of further hydraulic parts (oil pumps and management means for every oil motor or pair of oil motors associated with a pinion) is greater than compensated by the absence of the excessive-stress oil ducts, in particular of the flexible portions compensating the movements of the press. Stated pressostat 19, when energized, determines the tip of the HP (high pressure) step, deenergizing the valves 20 and 17. Our extremely precision computerized press machine has the traits of simple construction, adjustable stress, excessive diploma of automation and productivity. In abstract the operation of the inventive press makes use of first piston means 9, 9′ to move the beam upwardly or retract the beam from the bottom, second piston means 5, 5′ for transferring the beam downwardly towards the base into its working place, and third piston means 2, 2′ for exerting a further downward power on the beam to maneuver the beam towards the bottom and compress the ceramic powder to release air therefrom. Our press can save about 50% power than friction press, so it might probably reduce down giant cost. Enterprise Profile : We’re Manufacturers and suppliers of; Forging Presses, Friction Screw Press, Press Energy Presses, Energy Press Pillar Kind, Energy Press C Sort. In an effort to produce one advanced and vitality saving Screw Press for refractory industry, Mr. Tian Jiangtao, the president of our company dedicated to analysis and develop this new form Electrical Screw Press, which was the revolution of refractory gear, stated by Mr. Xu Dianli, the Cheif Secretary of China Refractory Association.
1. A flywheel and screw press for producing ceramic articles comprising, together, a base having an upper surface; a fixed head; support means supporting stated mounted head in fastened place upwardly spaced from stated upper floor of mentioned base; a movable beam positioned in the area between mentioned upper surface and stated fastened head and being guided on mentioned support means for movement toward and away from stated higher surface; mould means carried by stated base and provided with cavities open upwardly for receiving a charge of ceramic powder material, punch means carried by stated movable beam and designed to cooperate with mentioned cavities for forming ceramic articles, a first pair of hydraulic piston means carried by mentioned base and provided for imparting an upwardly directed thrust to stated movable beam; a second pair of hydraulic piston means carried by mentioned mounted head and offered for imparting a downwardly directed thrust to stated movable beam, stated first and second pair of hydraulic piston means cooperating for controlling the downward stroke of stated movable beam for imparting to the powder in the cavities a comfortable pre-compression causing a primary thickness reduction of the powder mass and an considerable expulsion of the air enclosed; a 3rd pair of hydraulic piston means carried by mentioned fixed head and controlled for acting on the movable beam and performing the first compacting step after the delicate pre-compression; a fourth pair of elastically compressible hydraulic piston means carried by said base and provided with adjustable rod ends and in a position to interfere with mentioned movable beam when the latter is further lowered throughout mentioned first compacting step for impressing to mentioned movable beam an upwardly directed thrust helping the elastic return of the compacted powder mass to raise mentioned movable beam immediately after said first compacting step, permitting the expulsion of the remaining air; a flywheel disposed above said mounted head, a screw threadedly engaged to stated flywheel and carried by mentioned mounted head; motor means provided for alternatively imparting to said flywheel and screw rotation in one and in the other course for lowering and elevating mentioned flywheel and screw, and control means for controlling stated motor means to operate mentioned flywheel and screw within the reducing direction in due time for impacting stated movable beam and performing a strong second and supreme compacting step of the powder materials immediately after the elastic return of the powder materials; and hydraulic circuit means for well timed controlling and energizing all of the pairs of said hydraulic piston means, said hydraulic circuit means, interconnecting all the pairs of mentioned hydraulic piston means.
A pressured lubricating system will feed the lubricate oil into the closed screw-nut system by means of special pipeline, and form an oil display between each touching elements to reduce the parts friction when press works. A plurality of pinions engaging within the stated toothed rim are every pushed by an oil-hydraulic axial piston motor or by a pair of oil-hydraulic axial piston motors and the axial piston motors together with the pinions are disposed on a platform surrounding the higher cross member of the press frame. No. 3,359,608, issued to the current inventor, discloses a friction and screw press for the manufacture of ceramic articles. In line with the data present: data disparity, because the double-disc friction press operation will exist when stealing hammer, missing hammer phenomenon, the output shall be floater than the CNC electrical screw press, however according to the provisions of the corporate to suppress the hammer products, Two sorts of stress brick equipment production are comparable. Moreover, it’s doable to manage the movement of the flywheel 7″ and screw 7′ by operating a hydraulic motor 7, having a comparatively lowered dimension, installed on the beam eight to move the screw 7 by way of a detachably coupled system which is hydraulically interconnected to pistons 9, 9′. Line 41 illustrates the return of the screw, which must be thrown in an up motion with a power of much less value than that supplied for the elastic return of the construction of the pressing machine. The stress exerted by the screw 7′ on the fabric could also be predetermined in a precise method, with the potential for utilizing limited torque mills for the stroke of the flywheel, akin to hydraulic motors, electrical motors or friction motors with restricted torque comparatively to the motor used up to this moment. In the course of the acceleration phases for the downward motion and the upward movement of the spindle 9 the electrical motor 28 operates with approximately constant energy and fixed rotational velocity which ensures a high degree of electrical efficiency of the motor 28. The fixed motor energy is transformed and absolutely utilized by the oil pump 27 operating as a torque converter. Stated circuit further comprising control means for controlling the strain of the hydraulic fluid fed to said motor means and a plurality of pressure phases, considered one of said stages being controllable as braking pressure for mentioned flywheel, and a refill pump means for returning leaked hydraulic fluid to mentioned circuit.