So as to reduce the funding for production gear, we are able to also modify the outdated kind friction screw press into new electrical screw press.Disadvantages of Friction Disk Screw Press: long transmission chain and high power consumption, more fast-wear components,not correct controlling and labor-intensive, noisy, unsafe, and so on. A compelled lubricating system will feed the lubricate oil into the closed screw-nut system by way of special pipeline, and kind an oil screen between each touching elements to cut back the elements friction when press works. A plurality of pinions engaging in the said toothed rim are every driven by an oil-hydraulic axial piston motor 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 upper cross member of the press frame. No. three,359,608, issued to the present inventor, discloses a friction and screw press for the manufacture of ceramic articles. In response to the info show: information disparity, as a result of the double-disc friction press operation will exist when stealing hammer, lacking hammer phenomenon, the output will probably be floater than the CNC electrical screw press, but in line with the provisions of the corporate to suppress the hammer products, Two sorts of stress brick gear production are comparable. Furthermore, it’s possible to regulate the movement of the flywheel 7″ and screw 7′ by working a hydraulic motor 7, having a comparatively reduced dimension, put in on the beam 8 to maneuver the screw 7 by way of a detachably coupled system which is hydraulically interconnected to pistons 9, 9′. Line forty one illustrates the return of the screw, which has to be thrown in an up motion with a power of much less value than that equipped for the elastic return of the structure of the urgent machine. The strain exerted by the screw 7′ on the fabric may be predetermined in a precise manner, with the potential of utilizing restricted torque generators for the stroke of the flywheel, corresponding to hydraulic motors, electric motors or friction motors with restricted torque relatively to the motor used as much as this moment. Throughout the acceleration phases for the downward motion and the upward movement of the spindle 9 the electric motor 28 operates with roughly constant energy and fixed rotational velocity which ensures a excessive diploma of electrical effectivity of the motor 28. The fixed motor power is transformed and totally utilized by the oil pump 27 working as a torque converter. Stated circuit additional comprising control means for controlling the strain of the hydraulic fluid fed to said motor means and a plurality of pressure stages, one in every of stated levels being controllable as braking pressure for mentioned flywheel, and a refill pump means for returning leaked hydraulic fluid to said circuit.
With the intention to supply the oil-hydraulic motors, an oil station is required which comprises an electrical motor, oil pump, high-pressure accumulator and control units in addition to gadgets for filtering and cooling the oil, and which along with the press is disposed on the office ground, in a basement or on a scaffold and is related to the oil-hydraulic motors by the use of flexible excessive-pressure ducts which compensate for the movements of the press. All pistons operate at one hundred atm, roughly, as working stress. 9, the step represented by line 30 represents the quick lowering down stroke path of the beam 3 because 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 eight-12 and 10. The line portion 31 is the braked down motion to fulfill the mass to be pressed at filling (degree 32) with low pace, with the intention 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 brand new product which built-in screw press advangtage of south china and north structure adopts the split body and solves the issue of the rack fracture ,which has the characteristics of straightforward and reasonable gear structure, beautiful appearance, easy operation, maintenance and method to complete the work of workstation is that the motor drives pinion and then pinion drives flywheel rotating with energy releasing for the requirements of the tools is principally used in the precision forging of ferrous metals, nonferrous metals, refractory materials and different industries. In response to the invention every 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 provide course. Business Profile : We’re Producers and suppliers of Energy Press Piller Type, Energy Press Two Station, Power Press two Gear, C Kind Power Press, Friction Screw Presses, Down Stroke, Forging Press Up Stroke Metal Body, Pneumatic Clutch Press, Billet Shearing Machine, Heavy Duty Double Column Planner, Plano Miller, Plano Miller Cum Planner, Cone Pulley and plenty of kinds of Industrial Machines. The strain utilized at this second is set and given by the load of the beam three plus the motion of the pistons 5 and 5′ (less the pressure of the pistons 16″ of help of the mould in case of use of the mirror sort mould).
Thus, in accordance with the invention, there is supplied a flywheel and screw press for producing ceramic articles comprising, together, a base seventy two having an upper surface; a set head 71; help means 73, seventy three supporting said mounted head seventy one in fixed position upwardly spaced from stated upper surface of mentioned base seventy two; a movable beam 3 positioned in the house between stated higher floor and mentioned fixed head seventy one and being guided on stated support means seventy three, seventy four for movement towards and away from stated higher surface; mould means carried by mentioned base 71 and provided with cavities open upwardly for receiving a cost of ceramic powder material, punch means carried by stated movable beam 3 and designed to cooperate with stated cavities for forming ceramic articles, a primary pair of hydraulic piston means 9, 9′ carried by said base seventy two and supplied for imparting an upwardly directed thrust to mentioned movable beam three; a second pair of hydraulic piston means carried by mentioned mounted head and provided for imparting a downwardly directed thrust to mentioned movable beam 3, said first 9, 9′ and second 6, 6′ pair of hydraulic piston means cooperating for controlling the downward stroke of stated movable beam 3 for imparting to the powder within the cavities a delicate pre-compression inflicting a first thickness discount of the powder mass and an appreciable expulsion of the air enclosed; a 3rd pair of hydraulic piston means 5, 5′ carried by stated fixed head 7 and controlled for acting on the movable beam three and performing the first compacting step after the gentle pre-compression; a fourth pair of elastically compressible hydraulic piston means thirteen, thirteen’ carried by stated base seventy two and supplied with adjustable rod ends and capable of intrude with mentioned movable beam three when the latter is further lowered during stated first compacting step for impressing to stated movable beam 3 an upwardly directed thrust helping the elastic return of the compacted powder mass to raise said movable beam three immediately after stated first compacting step, permitting the expulsion of the remaining air; a flywheel 7″ disposed above mentioned fixed heat 71, a screw 7′ threadedly engaged to said flywheel 7″ and carried by stated fixed head 71; motor means 7 provided for alternatively imparting to stated flywheel 7″ and screw 7′ rotation in one and within the different course for lowering and elevating flywheel and screw, and control means for controlling said motor means 7 to function stated flywheel and screw in the reducing direction in due time for impacting stated movable beam three and performing a powerful second and supreme compacting step of the powder material instantly after the elastical return of the powder materials; and hydraulic circuit means for timely controlling and energizing all of the pairs of stated hydraulic piston means, stated hydraulic circuit interconnecting all the pairs of mentioned hydraulic piston means.
1. A flywheel and screw press for producing ceramic articles comprising, together, a base having an upper floor; a fixed head; support means supporting stated fixed head in fixed position upwardly spaced from stated higher floor of said base; a movable beam positioned within the area between mentioned upper surface and mentioned fastened head and being guided on said help means for movement toward and away from said higher surface; mould means carried by stated base and provided with cavities open upwardly for receiving a charge of ceramic powder materials, punch means carried by stated movable beam and designed to cooperate with stated cavities for forming ceramic articles, a primary pair of hydraulic piston means carried by said base and offered for imparting an upwardly directed thrust to said movable beam; a second pair of hydraulic piston means carried by mentioned fastened head and supplied for imparting a downwardly directed thrust to said movable beam, said first and second pair of hydraulic piston means cooperating for controlling the downward stroke of said movable beam for imparting to the powder within the cavities a soft 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 said mounted head and controlled for appearing on the movable beam and performing the primary compacting step after the soft 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 intervene with said movable beam when the latter is additional lowered during stated first compacting step for impressing to said movable beam an upwardly directed thrust helping the elastic return of the compacted powder mass to boost stated movable beam instantly after said first compacting step, allowing the expulsion of the remaining air; a flywheel disposed above said fastened head, a screw threadedly engaged to mentioned flywheel and carried by stated mounted head; motor means supplied for alternatively imparting to stated flywheel and screw rotation in one and within the other path for reducing and raising mentioned flywheel and screw, and management means for controlling mentioned motor means to function said flywheel and screw within the decreasing path in due time for impacting said movable beam and performing a powerful second and ultimate compacting step of the powder materials instantly after the elastic return of the powder material; and hydraulic circuit means for timely controlling and energizing all of the pairs of mentioned hydraulic piston means, mentioned hydraulic circuit means, interconnecting all the pairs of stated hydraulic piston means.
The invention pertains to a screw press having a flywheel rotationally related to the spindle by means of a friction coupling and a spindle displaceable axially in a nut mounted in the upper cross member of the press body, wherein the flywheel has external toothing to a width corresponding to the maximum press stroke plus the width of the driving pinion, a plurality of pinions engaging within the said 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 together with the pinions are disposed on a platform surrounding the upper cross member of the press frame. three, strains forty and forty one are representative of the screw stroke, and contours 30, 31, 31′, 33, 34, 35, 36 and 43 are consultant of the stroke of beam three. In a excessive 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 facility of the pistons 9 and 9′ is such that it exceeds the burden of the beam three and the drive of the pistons 5 and 5′. This new construction relies on the refractory forming characters, which is our firm developed based mostly on SD20 Collection Electrical Screw Press for the refractory industry. Shortly earlier than the top of the downward stroke of the spindle 9 the rotational pace of the pump 27 and hence the rotational pace of the flywheel 17 and the spindle 9 are lowered to zero during the rest of the stroke of the spindle 9. When the rotational velocity is decreased the four-approach valve 41 is displaced from the rest place to the correct and the line 42a is linked to a second strain-limiting valve forty three. The stress which may be regulated by the strain-limiting valve forty three limits, by way of the pressure-limiting valve 42, the pressure current within the pipeline 31 to the braking stress required for braking the flywheel 17. Relating to the present pressing machines, the number of strokes achieved between the washing phases of the moulds, is from 2 to 3 instances as nice. For the reason that electrical motors are twice accelerated from relaxation to the required rotational speed and braked again throughout each working cycle, correspondingly high current heat losses are unavoidable and likewise the idle power absorbed by the motor is disadvantageous. Experimentally, with a urgent machine in accordance with the present invention, it might be noticed that the necessary power for the first urgent operation, with predetermined lots of ceramic, might be fairly low, roughly 10-12,000 kg., towards the four hundred,000 Kg of the second pressing operations, which is sort of totally different from the present pressing machines, which require about 50 to one hundred fifty tons for the primary pressing step.