Posted on August 26, 2020
The invention relates to a screw press
The invention relates to a screw press for sale having a flywheel rotationally connected to the spindle by the use of a friction coupling and a spindle displaceable axially in a nut mounted within the upper cross member of the press frame, wherein the flywheel has exterior toothing to a width comparable to the utmost press stroke plus the width of the driving pinion, a plurality of pinions participating within the mentioned toothed rim are each driven by oil-hydraulic axial piston motors 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 upper cross member of the press frame. three, strains forty and 41 are representative of the screw stroke, and contours 30, 31, 31′, 33, 34, 35, 36 and 43 are consultant of the stroke of beam 3. In a high position 30 the beam 3 is supported by the pistons 9 and 9′ against the adjustable plunger heads 6″ and 6′” of the pistons 6 and 6′. The ability of the pistons 9 and 9′ is such that it exceeds the weight of the beam 3 and the drive of the pistons 5 and 5′. This new construction relies on the refractory forming characters, which is our firm developed based on SD20 Sequence Electric Screw Press for the refractory business. Shortly earlier than the end of the downward stroke of the spindle 9 the rotational velocity of the pump 27 and hence the rotational pace of the flywheel 17 and the spindle 9 are diminished to zero during the remainder of the stroke of the spindle 9. When the rotational speed is decreased the 4-manner valve 41 is displaced from the remainder place to the suitable and the line 42a is linked to a second pressure-limiting valve 43. The strain which may be regulated by the pressure-limiting valve forty three limits, by way of the strain-limiting valve 42, the strain current within the pipeline 31 to the braking strain required for braking the flywheel 17. Relating to the current urgent machines, the variety of strokes achieved between the washing phases of the moulds, is from 2 to 3 times as great. Since the electrical motors are twice accelerated from relaxation to the required rotational pace and braked again throughout each operating cycle, correspondingly high current warmth losses are unavoidable and also the idle power absorbed by the motor is disadvantageous. Experimentally, with a urgent machine in accordance with the current invention, it would be noticed that the required energy for the primary pressing operation, with predetermined plenty of ceramic, might be quite low, roughly 10-12,000 kg., against the four hundred,000 Kg of the second pressing operations, which is kind of completely different from the current pressing machines, which require about 50 to one hundred fifty tons for the primary pressing step.
In an effort to supply the oil-hydraulic motors, an oil station is required which includes an electric motor, oil pump, high-pressure accumulator and control gadgets in addition to units for filtering and cooling the oil, and which in addition to the press is disposed on the office flooring, in a basement or on a scaffold and is connected to the oil-hydraulic motors by way of versatile excessive-pressure ducts which compensate for the actions of the press. All pistons function at one hundred atm, roughly, as working pressure. 9, the step represented by line 30 represents the quick decreasing down stroke path of the beam 3 as a result of its personal weight and the motion of the pistons 5 and 5′ when the discharge of the pistons 9 and 9′ is commanded by the valves 8-12 and 10. The line portion 31 is the braked down motion to satisfy the mass to be pressed at filling (degree 32) with low pace, to be able to keep away from the expulsion of the ceramic powder from the casting mould and a violent contact between the punches and the moulds, within the case of mirror moulds (nonpentrating). Is a new product which built-in screw press advangtage of south china and north structure adopts the cut up physique and solves the issue of the rack fracture ,which has the traits of easy and affordable tools construction, beautiful appearance, simple operation, upkeep and technique to complete the work of workstation is that the motor drives pinion after which pinion drives flywheel rotating with power releasing for the requirements of the tools is especially used in the precision forging of ferrous metals, nonferrous metals, refractory materials and other industries. In keeping with the invention each axial piston motor or each pair of axial piston motors respectively related to a pinion has related to it on the platform a controllable pump which is pushed by a respective electric motor and is reversible with respect to the fluid supply route. Enterprise Profile : We’re Producers and suppliers of Energy Press Piller Kind, Power Press Two Station, Energy Press two Gear, C Kind Energy Press, Friction Screw Presses, Down Stroke, Forging Press Up Stroke Steel Physique, Pneumatic Clutch Press, Billet Shearing Machine, Heavy Duty Double Column Planner, Plano Miller, Plano Miller Cum Planner, Cone Pulley and many varieties of Industrial Machines. The pressure utilized at this second is decided and given by the weight of the beam 3 plus the motion of the pistons 5 and 5′ (much less the pressure of the pistons 16″ of help of the mould in case of use of the mirror kind mould).A flywheel and screw press for producing ceramic articles comprising, in combination, a base having an higher surface; a set head; support means supporting said fixed head in fixed place upwardly spaced from said higher surface of mentioned base; a movable beam located within the space between stated higher floor and stated mounted head and being guided on mentioned assist means for movement towards and away from mentioned upper surface; mould means carried by said base and provided with cavities open upwardly for receiving a cost of ceramic powder materials, punch means carried by mentioned movable beam and designed to cooperate with said cavities for forming ceramic articles, a first pair of hydraulic piston means carried by said base and provided for imparting an upwardly directed thrust to said movable beam; a second pair of hydraulic piston means carried by said fixed head and provided 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 said movable beam for imparting to the powder in the cavities a soft pre-compression causing a primary thickness discount of the powder mass and an appreciable expulsion of the air enclosed; a 3rd pair of hydraulic piston means carried by stated mounted head and controlled for appearing on the movable beam and performing the first compacting step after the gentle pre-compression; a fourth pair of elastically compressible hydraulic piston means carried by said base and supplied with adjustable rod ends and in a position to intrude with stated movable beam when the latter is further lowered during mentioned first compacting step for impressing to said movable beam an upwardly directed thrust serving to the elastic return of the compacted powder mass to raise stated movable beam instantly after stated first compacting step, permitting the expulsion of the remaining air; a flywheel disposed above said mounted head, a screw threadedly engaged to mentioned flywheel and carried by stated fixed head; motor means supplied for alternatively imparting to stated flywheel and screw rotation in one and in the other path for decreasing and raising said flywheel and screw, and management means for controlling said motor means to function mentioned flywheel and screw in the lowering path in due time for impacting said movable beam and performing a strong second and supreme compacting step of the powder material instantly after the elastic return of the powder material; and hydraulic circuit means for well timed controlling and energizing all of the pairs of mentioned hydraulic piston means, said hydraulic circuit means, interconnecting all of the pairs of mentioned hydraulic piston means.
Furthermore, the sum of the occasions inherent to the primary and second pressing step impeded discount of the interval of an entire compacting cycle; and, the interval was all the time better than three seconds. In line with the exemplary embodiment an axial piston motor 26 (fixed displacement motor) and an axial piston pump 27 (variable displacement pump), i.e. axial piston machines, are supplied as these are essentially the most suitable. In the course of the quick up motion of beam three as a result of pistons 9 and 9′, the oil retained within the pistons 2 and a pair of’ is pressured to exit via the valves 61 and sixty one’ (FIGS. For the working stroke and the return stroke of the spindle 9 the extent of pivoting is proscribed to a pivot angle which corresponds to the rotational velocity of the spindle desired in every case and which determines the delivery of the pump 27 at a continuing rotational speed of the electric motor 28. A piston-cylinder association, which is acted upon, by way of the management 36, by a pump 39 pushed by an electric motor 38 in conjunction with a pressure accumulator forty, acts as the actuating drive 37. Pistons 9, 9′ may be mounted on base seventy two for operative engagement of the plungers thereof with beam three for the return stroke of the beam three after the pressing cycle, and the resultant emptying of the chambers related to the 2 pistons 2, 2′. Disadvantages of Friction Disk Screw Press: lengthy transmission chain and excessive energy consumption, extra fast-wear parts,not correct controlling and labor-intensive, noisy, unsafe, and many others. The press, with easy in structure, giant vitality, low noise, lengthy life, secure and dependable in operation, handy service and many others, might be broadly used in aviation, auto, tractor, device manufacturing, textiles equipment industries and so on. Refractory Recycling Crusher refractory price of installation in uaecement Basalt Crusher MOBILE CRUSHER Mobile Crusher concrete recycling; crushing equipment; coal mining equipment; sand making machine; about refractory price of set up in uaecement. Double-disk Friction Screw Press In Uganda. In accordance with the current invention, if there isn’t a inversion of the flywheel between the first and second urgent operation, there is less wear and a minor use of power to function the press. This automated electrical screw press is a multiple practical fire bricks molding machine. This advantageously implies that the torque applied to the flywheel could also be thrown by a motor straight and coaxially mounted on the flywheel, and never by a disc friction system.
Line 43 signifies the extraction of the pressed half by the mould because of the piston commanded by the respective valves 63 and sixty four in synchronism with the beam and the screw in a new up motion achieved by recognized command circuits. SD10-315 was the primary set Refractory Electric Program-managed Screw Press for Refractory industry in China which was our company developped and produced, even the primary set on the earth. Shortly earlier than the impact of the higher half of the forging die, secured to the slide 7 upon the forging work-piece lying in the lower half of the forging die, the strains 31 to the axial piston motor 26 are brief-circuited, as the magnetically managed four-means valve 41 is moved from its rest place (as proven in FIG. This Friction Screw Press Down Stroke has been developed from best grade metal. This machine can also be appropriate for producing naushadar bricks and head refractory. Change 23 energizes the valve 17 to disconnect the pilot of a check valve 22 and introduces oil at a pressure of 100 atmospheres into the chambers 15 and 15′ of dynamic oil accumulators 14, 14′ which may be hydraulically linked to pistons 13, 13′ as proven in FIGS. The torlence of controlling vitality of Electrical Screw Press is 0.2%, and the torlence of influence energy is only 1%. The small portions of oil running off from the pressure-limiting valves forty two and 43 and the 4-method valve 41 throughout the reversing and in addition as leaked oil are fed back once more into the closed circuit by a pump 45 driven by a motor forty four. A spring-centered, stress-controlled three-manner valve forty six is offered in order to ensure the feed strain required at the pump 27 and controlled by the stress-limiting valve 47. The three-approach valve 46 is actuated in such a approach that the respective low-strain facet of the closed circuit is related to the stress-limiting valve 47, the feed strain being maintained by the pump forty five. For cleansing and cooling the oil, the oil which has escaped from the circuit, is collected in part 32b of the tank 32, passed on after preliminary cleaning by sedimentation to part 32c of the tank 32, is fed through filters 50 and coolers fifty one by a pump forty nine pushed by an electric motor 48 and is stored partially 32a of the tank 32. Therefore, as a substitute of ending the first urgent with the worth of the urgent, the volume of oil at excessive strain could also be used. The electrical screw press is pushed by everlasting magnet synchronous servo motor,and encompass mechanical pats corresponding to framework, flywheel, screw nut, the slider, lubricating mechanism, braking mechanism and electrical components similar to servo motor, electric management cabinet, working button station.