SU1060297A1 - Machine for making boxless moulds - Google Patents

Abstract

A MACHINE FOR MAKING A SUSTAINABLE CASTING FORMS, containing a frame, a pressing chamber, two opposite vertical walls of which are formed by a support 1 and a press plate with model equipment, a piston drive for pushing the forgi out of the pressing chamber and a mechanism for moving the support plate with guides, different stages. that, in order to simplify the design and reduce the size, the pressing chamber is made movable from the piston actuators in the direction of movement of the press plate along the guides, which also The mechanism for moving the support plate is rigidly connected to the frame, and the bodies of the piston actuators for moving the pressing chamber and j pushing the mold are fixed to (L press plate, while the stop plate is installed with the direction of movement perpendicular to the direction of the press plate.

Description

05 Oh

IND

The invention relates to foundry, and to devices for flask-free manufacturing of casting molds. A molding block of an automatic line of model CL2002 is known for producing sandblasting by the press method, feeding them to a transport device with simultaneous stacking. The molding unit is a six position rotary table. At the first position of the forming block, a press mechanism with a horizontal axis and a sand-head are installed. The pressing mechanism consists of FROM the right and left hydraulic cylinders on the rods of which the press plates are fixed, which carry the model sets. The second and third positions are predetermined: they are meant for manually placing the rods directly into the Fourth position. The turntable is equipped with a device for ejecting forms onto the vehicle line. The first and six positions are for auxiliary operations. The turntable is driven by a hydraulic motor, which periodically rotates 60, the molding chamber, which is in the first position, is turned from the ends of the pressing plates. Next, the mixture is blown into the molding chamber. Pressing the plates with model kits, with further progress, compacts the mixture. After reaching a certain density of the mixture, the pressure plates return to their original position, thereby drawing the models. Simultaneously with these operations at the molding position (at the fourth position), the mold is pushed onto the transport means. Thus, six operations are performed on the same molding position; closing of the molding chamber, blowing of the molding mixture, pressing, withdrawal of pre-slate plates, rotation of the carousel, fixation of the shape of the vertical chamber. The known molding block has dimensions in terms of mm l. The presence of a rotary six-chamber table complicates the design of the whole block. The rotary six-chamber table requires a mechanism for precise fixation of chambers at the positions of the molding and extrusion of the mold. Minor wear of the elements of the table fixation mechanism leads to a distortion of the forms, ie, reduces the accuracy of castings. The closest to the technical essence of the invention is a Disamatic model 2013 automatic molding machine containing a frame, a pre-cutting chamber, two opposite vertical walls, the sides of which are formed of a stop plate and a pressing plate with model equipment, a piston DRIVE ejecting the mold from the compression chamber, the mechanism for moving the thrust plate with yugzimi guides, The mechanism for moving the thrust plate is made as part of a hydraulic cylinder with a second piston, four guide columns that rigidly connect the rod hydraulic cylinder with a frame, which is hinged abutment plate, deflecting the thrust plate with the cam roller, peskoduvnoy molding machine provided with a head. Disamatic works as follows: A molding sand is blown into the molding chamber, closed on the sides of the stop and press plates, using a sandblasting head (1-step). Press plate, moving forward, presses molding sand (2-step), Frame with stop plate at. the aid of the guide columns is retracted from the mold. When they move, model i emerges from the back of the forka, and during further movement, the model mounting, due to the copier and the deflecting roller, rotates into a horizontal position (3-4 operations). The pressing plate pushes the mold out of the pressing chamber when moving in the direction of pressing, pairing it with the previous one (5g-operation), the Press plate is retracted to its original position, removing the front models from the mold (b-operation), and the support plate with the frame also returns to its original position. At the same time, the model assembly returns to the vertical position and closes the pressing chamber (78- operations) 2, from the rear side. The 2013 Disamatic model machine, which makes casting forgies with dimensions of 480 (height f 600 width-, mm), has dimensions 1350 (height) 111360 Tyrina) "5995 (length mm, m, e, for operation requires significant production areas, structurally complex Thus, guide columns that form the length of the machine, the quality and accuracy of which depend on the exact amount of casting, require unique equipment for their mechanical, thermal, and galvanic processing. For example, even the Volga Automobile Plant, from A dismantling molding machine similar to the molding machine experiences difficulties in producing a number of parts and assemblies, especially a cylinder group and guide columns, and, at the expense of quality, has to produce them using a simplified technology. The performance of the KL2002 and Disamatic molding blocks can be fully used only in mass production. The purpose of the invention is to simplify the construction and reduce the size. The goal is achieved by the fact that in a machine for making furnace-free casting molds, the frame contains a press chamber Two opposite vertical walls of which are formed by a thrust and press plates with model equipment, a piston drive for ejecting the mold from the press chamber and a mechanism for moving the stop plate with directions, the press chamber is made movable from the piston packs in the direction of movement of the press plate along the guides As well as the guides of the movement of the support plate, they are rigidly connected to the frame, and the bodies of the piston drives of the movement of the pressing and pushing-out chamber of the mold are fixed to the ssovoy plate, the abutment plate is mounted movably in a direction perpendicular to the direction of movement of the press plate. The use in the proposed structure of the machine of the chamber movement by pressings in the movement of the press plate, the replacement of the long guide columns with the short directions to the pressing chamber to the press plate, the reassembly of the nodes by fastening the mold extrusion cylinders on the press plate can be used in the machine serially produced by domestic mechanical engineering hydraulic cylinders. All of this simplifies the design of the machine for the manufacture of bezopochny casting molds, reduces the cost of its manufacture, installation, operation and repair, reduces the production area. Fig. 1 shows the kinematic diagram of the machine for the manufacture of flaskless molds during the first operation of blowing molding sand into KeiMepy pressing / Fig, 2 - the same, when performing the second operation. pressing the blow molding sand; in fig. 3 - the same, when performing the third operation - removal from the stop plate of the extrusion chamber with the fabricated mold; FIG. 4 is the same when performing the fourth operation — displacing the support plate; in fig. 5 - the same, when performing the fifth operation - pushing the mold out of the pressing chamber by pairing it with the previous one} in FIG. B, the same; when performing the sixth operation, returning the pushing ST1. ITH to its original position J in FIG. 7 - the same , when performing the seventh operation — returning to the initial position of the support plate in FIG. 8, the same, when performing the eighth operation — closing the pressing chamber; FIG. 9 is a section A-A of FIG. 8; FIG. 10 - view B in FIG. 9, Kashin for the manufacture of cast-free molds (FIG. 1) contains a frame consisting, for example, of base plates, respectively, right 1, left 2 and holding columns 3, press chamber 4, chamber guide 5 pressing 4, press plate 6, thrust plate 7 with bottom 8, model montihik right, consisting of pushing plate 9 and model 10, model iontazh left, consisting of submodel plate 11 and model 12, sand-blower, with a working chamber 13, gate top 14, gate bottom 15 and belt conveyor 16, receiving arrangement Real 17 and drive system. The drive system contains hydraulic cylinders of the Essssss, the bodies 18 of which are fixed on the right base plate 1, and the rods 19 on the press plate 6, the hydraulic cylinder for pushing out the plate 20, the body 20 of which is fixed on the pressing plate b, the rod 21 on the ejector plate 9, the cylinders are re-measured by the chamber extrusion, the bodies 22 of which are also fixed on the press plate 6, and the rods 23 - in the pressing chamber 4, the hydraulic cylinder 24 for moving the abutment plate 7 and the pneumatic cylinder (not shown) for moving the upper gate 14 of the sandy gear. The mechanism for moving the anvil plate is made in the form of an actuator, for example a hydraulic cylinder 24, and slider guides (not shown) for the anvil plate 7. The machine works as follows. The entire mold manufacturing cycle is carried out in eight operations. When performing the first operation of blowing mold mixture 25 into the pressing chamber 4 (FIG. 1), at the sandblaster, the conveyor belt 16 stands, the upper gate 14 overlaps the working chamber 13, the blow nozzle 26 of the pressing chamber 4 is aligned with the blow nozzle 27 of the lower gate 15; at the press hydraulic cylinders, the supply channels 28 for the removal of the working fluid are blocked by the sign h J, the cavities of the housings 18 on both sides of the pistons 29 5 are filled with the working fluid, which makes the pistons 29 with rods 19 and the press plate 6 rigidly fixed in a static position; the mold ejection cylinder channels 28 are open and under atmospheric pressure P.,, at the hydraulic cylinders for moving the pressing chamber of the strips of the housings 22 on the sides of the pistons 30 that are free from the rods 23, are under pressure P, the working fluid, due to which the pressing chamber 4 is forcefully pressed against the sub-model plate 11. Thus, the internal volume formed by the pressing chamber 4, the ejector plate 9, the sub-model plate 11 and models 10 and 12 are prepared to blow the molding mixture 25 into it. In the working chamber 13 of The receiver of the receiver does not show compressed air Pg and with it the molding mixture 25 is blown into the specified internal volume. When performing the second pressing operation of the blowing molding molding mixture, the difference from the first operation is the following: working chamber 12 communicates with the atmosphere Pp, at the hydraulic cylinders of the housing cavity 18 from the sides of the pistons 29 free from the rods 19, are under pressure P, the working fluid, and the opposite cavities - under atmospheric pressure PQ; With the atmospheric pressure PD, the cavities of the hydraulic cylinders move The extruders located on the sides of the pistons free of the rods 23. As a result of such changes, the press plate 6, acting on the pusher plate 9, presses the molding mixture 25 (FIG. 1) to a given density, thereby forming the form 31. Press plate b moving with pressing the mold moves with it the housings 22 of the hydraulic cylinders moving the chamber 4, When performing the third operation, moving away from the thrust plate 7 of the pressing chamber 4 from the manufactured 31 (FIG. 3) the difference from the second operation is the following: The cavity of the housing from the side of the rod 19 is under pressure P of the working fluid, and the hydraulic cylinders of the displacement chamber of the pressing chamber 4 are closed - As a result, the pressure plate 6 and the pressure chamber 4 with the contacting form 31 move to the right. Model 12 is retrieved from Formula 31, the displacement of the blow nozzles 26 and 27 is removed, the blow nozzle 26 of the pressing chamber 4 is overlapped by the lower gate 15, and the blow nozzle 27 of the lower slide 15 by the pressing chamber 4. Simultaneously with the third operation sandblasting device: Bepknij shiber 14 - opens the working chamber from above, the conveyor belt 16 is turned on and the molding mixture 25 starts to flow into the working chamber 13,. When performing the fourth operation - displacement of the support plate 7 differs from the third operation: into the lower cavity of the hydraulic cylinder 24 compressed air P and its piston 32 lifted upward the stop plate 7 together with the submodel plate 11 and model 12 fixed on it, the channels 28 of the hydraulic cylinders of pressing and moving of the pressing chamber 4 are closed. At the same time, in the left support plate 2 of the crayfish, the window 33 was opened, and the bottom 8 of the support plate 7 filled the gap between the pressing chamber 4 and the left support plate 2, forming together with them and the receiving device 17 a flat continuous horizontal surface, which during the fifth operation (FIG. 5} is pushed out of pressing 4, form 31 j. When performing the fifth operation, the piston 34 without the rod 21 is pumped into the cavity of the cylinder of the form pushing out under pressure Pf working fluid. As a result, the ejector plate 9 moves to the left, trans rubbing along the lower horizontal surfaces of the pressing chamber 4, the bottom 8, the window 33, the receiving device 17, the form 31. Immediately before the contact of the form 31 with the previously made form 35 (FIG. 1-4), the speed of movement of the rod 21 decreases to such an extent that connection occurs without impact.Then the whole series of ready-made forms is pushed forward a distance equal to toldane of one form, when performing the sixth operation, returning the ejector plate 9 (fig, b) to its original position - the position of the working bodies compared to n that operation minutes following: a cylinder cavity vntal Sivan side rod 21 lodged under the operating pressure P koct yarn, opposite .polost soofschena atmospheric pressure. The rod 21 is drawn into the housing 20, returning to the initial position of the ejected plate. During this movement, model 10 is removed from the foreground 31, When the seventh O1 is performed (1 step, return to the initial position of the support plate 7 - difference from the sixth operation of the pedometer board: in the cylinder 24, the lower cavity communicates with the atmosphere, and compressed air is fed into the upper cavity, where the cavities The hydraulic cylinders are in communication with the atmospheric pressure. At the same time, the support plate 7, together with the model plate 11 and the model 12, returns to its original position. Kangsha 28 are the form extrusion hydrotsiline shut off, the conveyor belt 16 25 minutes the mixture into the working chamber 13 stopped.

The final eighth operation completes the manufacturing cycle of the mold, returning the pressing chamber 4 to its original position (Fig. 8). In this case, in the cavity of the hydraulic cylinders of movement of the pressing chamber, located on the sides of the pistons 30 without rods 23, is supplied under pressure Pf. working fluid, opposite cavities communicate with atmospheric pressure. The compressed air supply to the hydraulic cylinder 24 is stopped.

The entire machine cannot work without moving the pressing chamber 4 and the pressing plate 6. The accuracy of their displacement is ensured by the wedge pair 36 (fig. 9) and the horizontal pair 37 of the surfaces of the pressing chamber 4 and the guide 5, the pressing plate has the same pair through. -shaped 38, attached to it,

Thus, the proposed bead-casting mold making machine performs so much

the same operations as the hardware prototype. In a famous car

(О 1Samatiс) the hydraulic cylinders for pressing and pushing the formulas are arranged one after the other. In the proposed machine, these same hydraulic cylinders are placed in a row, which allows even with an enlarged form (dimensions respectively height and width 455 700 mm; in a known device these dimensions are equal to 480 ) t600-mm) reduce the length of the machine by 2595 mm. Dimensions of the proposed machine: 3450 height) g 1200 (width Haj "3400 (length) mm. Dimensions of the famous machine: 3150 (height)"

 1300 (width) -5995 (mm length. The proposed mavshnya design allows the use of hydraulic cylinders serially manufactured by the Kovrov Excavator Plant, which simplifies the manufacture of machines and solves the problem of providing spare parts for the machine during its operation by consumers. The retention columns function is greatly simplified - they ceased to be the guides of the pressing and thrust plates, therefore, the requirements for their manufacture have become dramatically simplified: high purity and precision of processing are not required, thermal and galvanic processing is not required Botko. All this makes the proposed car more technological in manufacturing, ie, is simplified design are reduced and its dimensions.

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Claims (1)

A MACHINE FOR MANUFACTURING • 30 FREE CASTING FORMS, containing a frame, a pressing chamber, two opposite vertical 'walls of which are formed by persistent and pressing plates with model accessories, a piston drive for pushing the mold out of the pressing chamber and a mechanism for moving the resistant plate with guides, distinguishing the fact that, in order to simplify the design and reduce dimensions, the pressing chamber is made movable from the piston drives in the direction of movement of the press plate along the guides, which also guide The mechanisms of the movement of the thrust plate are rigidly connected to the frame, and the bodies of the piston drives for moving the pressing chamber and pushing the mold are fixed on the press plate, while the thrust plate is mounted for movement in a direction perpendicular to the direction of movement of the press plate.