SU1031634A1 - Turntable-type automatic mounlding machine - Google Patents

Abstract

1. The carousel automatic molding machine, which contains a hopper-feeder, a rotary device with molds and an intermittent rotation mechanism, a device for feeding the core mixture into the molds and two-way multi-press pres-. with a drive, characterized in that, in order to increase the uniformity of the rod compaction, simplify the design and increase productivity, it is equipped with a manipulator-accumulator, the pressing device is made in the form of two crossbars with sealing units and sealing heads mounted on different the sides of the molds, the device for feeding the mixture and the rotator are made in the form of two containers with impellers and also placed on opposite sides of the molds. 2. Machine pop. 1, characterized in that the heads of the upper sealing assemblies have the smallest cross section and the largest. the height at the first pressing position and the smallest height and the greatest -. pepper section at the last pressing position. 3. The machine according to claim 1, about tl and h a y and a so that the number of sealing units corresponds to the number of pressing positions. . A machine according to claim 1, in that the manipulator of the torus drive is hollowed out in the form of a device. For accumulation of rods and a slide, on which the shaft is mounted on top, supply (L) axially movable shaft with drive gears, and bottom. - toothed sector. 5 The machine according to p. t, in that the device for accumulation of rods is made in the form of a multi-position rotary table with an intermittent rotation mechanism, оо 6. The machine according to p. 1, which is different in the form of two corner levers SAE with vert The local axis of rotation, located symmetrically to the longitudinal axis of the slide, the upper arms of which are designed to interact with the grippers, and the lower arms - with the lever arm connected to the manipulator of the hand crank.

Description

The invention relates to a foundry industry, in particular, to molding machines for the manufacture of foundry cores. In the foundry industry, machines of various designs are used for the manufacture of cores, among which press-type machines occupy a significant place. A rod machine is known which contains two main assemblies: a compaction unit and a dispensing unit, between which there is a kinematic connection. Crank type press mechanism. The mixture is compacted by a pressing unit consisting of a seal, connected to a spring-loaded plunger, moving in a crawler, and placed inside the seal of the punch. The metering mechanism consists of two vertically arranged and interconnected toothed pair of shafts, one of which carries a disk with dispensers, and the other a table with press molds. From below, the feeders are supported by a supporting disk, in which there is an opening in the position of the combination of the feeder with the mold, and on the opposite side there is a hopper with a tedder. Pressing takes place as follows: when the batcher is combined with the mold, the core mixture is transferred into the mold. At this moment, the pressing mechanism is triggered and the pressing body seals the mixture in the upper part of the rod with a compactor, and in the lower part with a punch. Cylindrical rods of relatively high height along detachable molds are made on this machine. The mold is removed from the slot machine and open manually. Closest to the proposed carousel is the MataViHa automatic molding machine, which contains a hopper, a rotary device with molds and. a mechanism of intermittent rotation; a device for feeding the core mixture a of the mold; and also a two-sided mega-position pressing device with a drive. The rod is compressed as follows: after the weight dosing of the dose of the core mixture and pouring it into the mold, a pneumatic actuator is turned on and the core mixture is simultaneously pressed from above and pressed in the bulk chamber from below. From above, the mixture is compacted with a plunger-type head, and from below, with a model of a sprue bowl. The core is removed from the mold in position, manually opened by C2 1. However, with such a machine, cores can be produced in which the molds are well filled with core mixture. For molds with significant conjugation to their filling, the method of upper and lower pressing using volumetric chambers is not suitable. The disadvantages of the machine also include the complex weight metering device used in it, which does not always provide an accurate dose, as well as a complex system of electromechanical and pneumatic actuators. There are a large number of contactors, latches, sensors, etc. elements in a dusty environment and intensive machine operation reduce its efficiency. The purpose of the invention is to improve the uniformity of the compaction of the rods, simplify the design of the machine and increase productivity. This goal is achieved by the fact that the carousel automatic molding machine is equipped with a manipulator-accumulator, the pressing device is made in the form of two crossbars with sealing units and sealing heads of the molds installed on opposite sides of the molds, the device for feeding the mixture and the rotary device are made in the form of two containers having impellers and also placed on different sides of the mold. The heads of the upper sealing assemblies have the smallest cross section and the greatest height at the first pressing position, and the smallest height and the largest cross section at the last pressing position. The number of sealing assemblies corresponds to the number of pressing positions. The drive hopper is made in the form of a device for storing rods and a slide, on which a shaft is mounted on top, equipped with drive gears gripping in the axial direction of the shaft, and a toothed sector j 3 10 in the bottom. In addition, the device for storing rods is made in the form of rotary table with a mechanism of intermittent rotation The drive of the grippers is made in the form of two angular levers with a vertical axis of rotation, located symmetrically to the longitudinal axis of the slide, whose upper arms are designed l reacting with grippers, with a lower lever arm connected to the arm-driven accumulator. FIG. 1 shows the machine, a general view; in fig. 2 is a schematic depiction of casting rods for caps of high-voltage insulators and fittings manufactured by the machine (double to the left, single to the right); in fig. 3, node t in FIG. one; FIG., k is a view along arrow A in FIG. one; in fig. 5 is a section BB in FIG. four; in fig. 6 is a sectional view BB in FIG. one; in fig. 7 - section G-Y in FIG. 6; in fig. 8 is a section d-d in FIG. 6. The carousel automatic molding machine (Fig. 1} consists of a base 1 on which a device is mounted for uniform distribution of the core mixture from the top and bottom over the molds 2, the mechanism 3 of the three-position upper and lower pressing, the feeder bin, mani pool torus storage 5, an electromechanical drive including an electric motor 6, an electric brake 7, a textrop speed transmission 8 and a box of a camshaft 9. A device for uniform distribution and pressing of the rod mixture (Fig. 3) is located in the ver It contains parts of the base 1 of the machine and contains a pallet 10 on which box P and shaft 12 with a bearing assembly are mounted. At the upper end of shaft 12 is mounted a hub 13j carrying a drum I with a bowl. In addition, at the top the hub is connected to the input shaft 15 of a whisk , at the bottom - with impeller 16 A ratchet mechanism 17 with a fixing mechanism 18 is mounted on the lower horse of the shaft 12. The drum 1 and the box 11 are coaxial (they lie between the throats, between which there is a labyrinth seal. Above the bowl of the ban bar is located the ring 19 with paddles. Impeller 21 is mounted on the end of the hollow output shaft 20 of the feed hopper in the drum bowl. On the non-bowl, in the extraction position of the molds from drum I, there is a knife flap 22. Impeller 21, seated on the advantageous shaft 20 of the bunker -pitel, has a rotation opposite to the drum And with a bowl. Compression of the molds in the recesses 23 of the drum And with the bowl is carried out by spring-loaded levers with rollers 2. The mold, located in the recess 23 of the drum with the bowl, communicates with two capacities: permanently with the bowl of the drum and periodically (at the pressing positions ) - with a box 11. The pressing mechanism consists of an upper traverse 25 with three seals 26 and two guide rods 27 and a lower traverse 28 with three seals 29 and two guide rods 30. There is a kinematic link between the rods and the drive of the machine. The upper seals 26 include a housing, a spring and a stem with a U-shaped sealing head 31, which: on the one hand, penetrates well through the layer of the mixture in the drum bowl And and in the mold itself, compacting the mixture in the depth of the mold, on the other, allows extruded double and single rods (Fig. 2). In the first, upper, during the pressing of the compactor, the height of the sealing head 31 is the greatest, and the cross section is the smallest. In the next two seals, the height of the sealing heads gradually decreases, and the cross-section increases and in the third sealing head is equal to the area of the pressing rod. The ends of the sealing heads of the first and second seals for the directional pressing of the mixture have corresponding bevels and roundings. The end of the third compactor is made flat. Bottom seals 29 include a housing, a spring, and a stem with a sealing head 32 consisting of two rods of constant cross section similar to that of a sealable rod element. In the first in the course of pressing and in the third seal, the cross section of the sealing heads is slightly smaller than the area of the rod element to be sealed, and in the second seal, the neck of the rod is somewhat smaller (section aa, Fig. 2). in the initial, lower, position, the ends of all sealing heads are aligned with the inner plane of the pallet 10, and the upper position of the ends of the sealing heads of the first and third seals reach through the holes in the box to the lower surface of the molds, and the rods of the sealing head of the second seal are mold cavity. This is achieved by earlier, using stops, limiting the movement of the first and third seals. The feeder bin k (Fig. 3) is made in the form of a cylindrical tank, to the bottom of which a neck is attached through a conical funnel. From the sides, the feeder bin has racks by which it rests on the base 1 of the machine. Inside the feeder hopper is placed on a box (not shown) with an inlet 15 and an outlet 20-shafts which serves to change the direction of rotation of the output shaft 20 relative to the rotation of the drum And with the bowl. The lower end of the input shaft 15 is connected to the hub 13, the upper passage through the box carries a cone tedder (not shown). In the upper part, the output shaft 20 is kinematically connected to the core mix feed blades (not shown) whose position can be changed by a handwheel. The lower end of the output shaft 20 carries the impeller 21. The drive-to-drive manipulator (in Fig. K is depicted at the time of mold opening on the storage drive table) consists of two nodes: the storage drive table and the tool carrier, between which there is a kinematic connection. The storage table includes a shaft 33 with a bearing assembly, a disk 3 with studs 35 for fixing the rods when opening the molds, a ratchet mechanism BZ with a balance bar 37 and a roller 38 The manipulator includes a frame 39 with guides kO and a slider k. The frame is fixed on the basis of 1 car. The slider k on the k2 brackets and bearings 3 carries the gear shaft kk. On the gear shaft kk, two symmetrically mounted relative to the gear shaft of the mechanism are mounted for gripping the half-molds of the mold kS with T-shaped heads 46. Each of these mechanisms includes a housing 47 with a T-shaped groove and cheeks 48 on the outside, a pressure frame 49 s screw 50 and springs retracting the frame to its original pressed position (not shown). The body t also has a rocker 51, one shoulder of which rests on the screw 50, and a spring 52 acts on one side and a small lever arm 53 on the other. To move the body kj along the axis of the gear shaft kk and rotate together with it, as well as for the spring stop S, there is a fork 55 fixedly mounted on the gear shaft. At the bottom of the half, on the brackets 56 with bearings there is a gear sector 57 which is meshed with the gear shaft and has a stretching springs 58. With the leftmost position of the anipulor, the toothed sector abuts against the roller stop 59. with the extreme right .- in the screw stop 60. Mold opening performed -. The corner levers 61, the upper arms of which rest against the cheeks of the 8 bodies, and the lower arms against the upper shoulder of the lever 62, located on the brackets 63 with bearings. The lever 62 is driven by a rod 64 from the manipulator actuator. The ratchet stolan accumulator is driven by the carrier 65 fixed on the slider 41. To ensure the storage table stand in the initial period of movement of the manipulator to the right, there is a gap between the roller 38 and the carrier 65 of the balance bar 37. The manipulator slider 41 is driven by the lever 66 and the rod 67 from the manipulator drive. The pressing of the clamping frame 49 by the levers 53 is effected from the stops 68, which are laid out on the base 1. On the basis of one machine for setting the molds, one platform B9 is located outside of the box 11. All the actuators of the machine are driven by a drive, the main assembly of which is the camshaft box 9 (Fig. 5), consisting of the housing 7, the gearbox 71 and the shaft 72 with a block of four cams. A cam 73 with a lever 74 and a rod 64 (Fig. 4) serves to open the molds, a cam 75 with a three-arm lever 7b connected to the rods 27 sets the pressing mechanism in motion, and a cam 77 with a rocker 78 connected to the ratchet mechanism 17 informs drum 14 with a bowl intermittent motion. In addition, a twin cam 79 with a corner / sprung EO lever and a barbell. 67 (Fig. Informs the slider L1 manipulated (forward and backward movement. To debug the interaction of the mechanics, the machine is additionally equipped with a hand wrist, which, if necessary, is put on the drive shaft 81. gear 71). The button associated with electromerase 7 (Fig. 1). The amount of core mixture supplied from the bunkeritizer k is set by the handwheel. The carousel automatic molding machine works as follows. With the help of a manual drive knob interaction between the machine mechanisms. The hopper A, the drum tea lA and the box 11 are filled with a core mixture. The manipulator is placed in the extreme right position (FIG. 1) between the mold 1, located in the recess of the drum, with the levers 53 (FIG. 4), in contact with the stops 68, provide for the withdrawal (under the action of springs, not shown in the drawing) of the pressure frames 49 to the initial position. By pressing the start button, the cam shaft 72 of the drive moves, causing the machine mechanisms to work. c / yuduyu sequence. When the cam shaft 72 rotates by 90 ° of the turn, with the help of the cam 77 of the rocker arm 78 and the ratchet mechanism 17, the shaft 12 with the drum I is turned 60. Simultaneously with the rotation of the drum, the feeder / feeder bunker 4 is fed, feeding the core mixture into the bowl of the drum, the impeller 21 distributing the core mixture through the molds from the top and rotating in the opposite direction of the drum, and the impeller 16, is distributed to the 1st rod the mixture at the pressing positions in the box P. The level of cm si in the bowl of the drum in the zone of location of the molds is determined by the position of the ring 19c with paddles and the amount of the mixture coming from bunker 14. At the end of the turn of the drum T-shaped heads och Independent user will mold into the T-shaped grooves 7 housings i gripper of the manipulator, and knife-strip the flap 22 and the top of the rod will block the opening in the bottom of the bowl of the drum and at the end of the drum rotation with the cup enters H dwell. During this time, the cam shaft J2 is rotated another 270 ° and the pressing and extraction processes of the finished rod are performed. The pressing process proceeds as follows. The movement from the cam 75, the lever 7b (Fig. 5) is transmitted to the rods 27 (Fig. 3) carrying the yoke with the upper gunners, and they begin to fall down, and the kinematically associated with them with the lower seals rise up. At the first from the top of the pressing position, the head of the seal, having reached the level of the mixture in the bowl of the drum I, sinks into it, taking a part of the core mixture in front of it. At its deepest immersion, the density of the mixture increases and, when necessary, reaches the required one. With the stiffness of the spring, the seal begins to squeeze out from under the sealing head to the sides, and the spring deforms. At the first lower position of the pressing rod, the sealing head, the passage through the mixture layer in the box II, also carry away the core mixture in front of it, filling the cavity of the machine with it. The movement of the sealing head continues until the end of the sealing of the mixture with a given spring stiffness, after which the composition begins to be squeezed out from under the ends of the sealing head to the sides, and the spring is deformed. In the case when the amount of mixture fed into the mold cavity does not cause the spring to deform, the movement of the sealing heads of the first and third seals is restricted to ynopai on the pallet 10 (not shown), while the sealing head of the second sealing continues. At the end of the pressing, the seals are returned to their original position by the action of the springs. Upon subsequent rotation of the drum k with the press cup, the molds are moved to the following press positions.

at the same time fill the mixture on top and prepare the mixture in the bottom of the box 11.

The mixture of the subsequent upper and lower positions is likewise sealed in a similar way, differing only in that the sealing heads of the second lower sealant enter the cavity of the mold, sealing the neck of the rod.

Removing the finished rod is carried out as follows.

The movement from the cam 79 through the corner lever 80, the rod 67 and the lever 66 is transferred to the manipulator, and with the pre-loaded mold it moves quickly to the left (Fig. K}, while simultaneously returning the balance weight 37 to its original position. At some distance from the drum I (before the mold leaves the clamping levers 2k), the levers 53 w or F1 are attached, and the springs 52 through the yokes 51 and the screws 50, acting on the frames A9, clamp the mold halves, ensuring, with regard to transverse fixation (not shown), their reliable retention.

When the toothed sector 57 approaches the roller stop 59, the speed of the manipulator slows down, the translational movement of the toothed sector stops at the meeting with the stop, and it rotates around its axis and engages the gear shaft with the mold 45 by 180 and installs. puncturing the rod on the pin 35, it on the disk 3 of the table-drive.

By the end of the rotation of the gear shaft kk, the movement of the manipulator to the left ends and its vystoi begins.

At this time, the movement of the cam 73 through the lever 7, the rod b and the lever 62 is transmitted to the lower arms of the levers 61, and the upper ones, acting on the cheeks of the bodies "7, are moved apart together with the half molds of the mold 5 retained by them.

By this time, the manipulator end stops and it starts moving to the right at a slower speed.

Simultaneously with the withdrawal of the manipulator, the stretched springs 58, acting on the toothed sector 57, turn the gear shaft tk in the opposite direction by 180 °.

Before turning the pinion shaft C at 90 °, the mold is opened, and the column collector, due to the gap between the roller 38 of the balance weight 37 and the carrier 65, makes a stand. Subsequently, before the gear shaft rotates 180 °, the mold, due to the action of the springs .5, is closed by the action of the cam 73, and the disk 3 of the driving table is rotated by 90.

After the mold is rotated by 180 ° and installed on the platform 69 in front of the drum slot And with your mouse, the manipulator sets it to the drum slot at high speed, at the same time returning the clamping frame 9 to its original position. After that, the machine's duty cycle is repeated.

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Claims (6)

1. A rotary automatic molding machine containing a hopper-feeder, a rotary device with molds and an intermittent rotation mechanism, a device for feeding the core mixture into the molds and a two-way multi-position pres-. a drive device with a drive, characterized in that, in order to increase the uniformity of the compaction of the rods, simplify the design and increase productivity, it is equipped with a storage manipulator, the pressing device is made in the form of two traverses with sealing units and sealing heads installed on different the sides of the molds, the device for feeding the mixture and the rotary device are made in the form of two containers having impellers and also located on opposite sides of the molds. 2. Machine pop. ^ characterized in that the heads of the upper sealing units have the smallest cross section and the largest. height in the first pressing position and the smallest height and the largest. cross section at the last pressing position. 3. Machine by π. 1, with the fact that the number of sealing units corresponds to the number of pressing positions. 4. Machine pop. ^ characterized in that the storage manipulator is made in the form of a device for storing rods and a slider on which a shaft is mounted on top, equipped with axially movable shaft-drive pinion gears, and a gear sector on the bottom. 5. Machine pop. ^ characterized in that the device for the accumulation of rods is made in the form of a multi-position rotary table with an intermittent rotation mechanism. 6. Machine pop. ^ characterized in that the gripper drive is made in the form of two angular levers with a vertical axis of rotation located symmetrically to the longitudinal axis of the slider, the upper arms of which are designed to interact with the grippers, and the lower arms with a lever arm connected to the drive of the manipulator.