SU476937A1 - Machine for low pressure casting - Google Patents

Description

3

portions of the liquid metal are very extensive. This worsens the use of production, special areas, complicates the work of transport, creates an increased danger in the workshop. The presence of more mechanisms on mobile carriages; mixing mechanism (electric motor with gearbox), directing them, hydraulic cylinders, mold holders - makes the design of the machine complex, heavy and cumbersome.

A low pressure casting machine is also known, which includes a metal-distributing transfer furnace with a column installed next to it. On the column, with the possibility of rotation, there are placed upper and lower traverses, rigidly connected to each other with the help of four guides. Bottom traverse Yavl 1ets is the form holder of the lower half-form, and the form holder of the upper half-form is located on the guides with the possibility of movement in the vertical direction by means of a cylinder fixed on the upper traverse. The machine can be made on-off by mounting a second column with a snap-in with respect to a single transfer furnace. It is easy to operate the furnace and metal-wire by means of a traverse with a snap around the column.

Despite a number of advantages, this machine also has significant drawbacks. In it (as in the previous known machine) the maintenance of the form is difficult due to the rigid connection between the cross-arms, made in the form of four guides. The presence of guides limits the size of the tooling. The form can be installed on the machine only on the side. In addition, the turning part of the machine is complicated and cumbersome, since it includes a significant number of elements: crossheads, guides, upper mold holder and cylinder.

A low pressure casting machine is also known, which includes a metal conduit dispensing furnace, a pivot arm column, a traverse with a cylinder for the casting mechanism, a control system and a mold. The bottom of the mold is fixed on a pivoting arm, which is made movable along the column, and the upper half of the mold is connected to the cylinder rod mounted on the cross bar above the furnace through the mold holder.

Unlike the previous constructions, it is convenient to maintain the mold on this machine, install the rods and install the molds with a crane, since these operations are carried out on the novorot lever in the position when the lever is removed from under the crosshead. Access to the shape and size of it is not limited by the guides. The absence of traverse on the pivot arm, guides and cylinders facilitates the design of the machine.

One of the drawbacks of such a machine is its low productivity, since the machine is single-position, and it cannot be done with a two-position machine simply by doubling the new node. This is due to the fact that the upper half is rigidly fixed.

on-rod cylinder, placed on the traverse above the holding furnace.

In addition, the elimination of guides and traverse on the rotary part leads to the fact that during assembling and disassembling the bottom half-form is not fixed rigidly due to insufficient rigidity of the rotary lever and the gaps between the lever and the column loaded during these operations. Lack of fixation causes high wear.

forms and limits the nomenclature of castings (their height and size of the casting slopes).

The purpose of the invention is to ensure reliability and ease of maintenance. This is achieved by the fact that the upper half

mounted with the ability to interact with the power cylinder, located above the transfer furnace, through a plate mounted on its rod, and at the casting removal position there is a disassembly mechanism, made in the form of a cylinder, on the rod of which the element of periodical connection with the upper half-form is fixed, and the mechanism for fixing the rotary leverage. The element of the periodic connection is made in the form

the cracker, which interacts with the brackets mounted on the top noluform, with the pins rigidly fixed on the cracker, which interact with the brackets through the holes made in them. The locking mechanism of the pivot arm is made in the form of a pressing cylinder and stops rigidly connected to the machine bed.

FIG. 1 shows the proposed machine,

side view (disassembly positions are conventionally rotated in the plane of the drawing); in fig. 2 - the node (I) of the periodic connection of the cylinder with the brackets of the upper half-form; in fig. 3 - car, view in plan.

On a common base 1, four columns 2-5 are installed (in a P-shape plan), interconnected by three crossbars 6-8. Between columns 3 and 4 there is a furnace with a metal pipe 9. The furnace has a filling hatch

10. A power cylinder 11 is placed over a bar on the traverse, on the rod 12 of which the clamping plate is fixed 13. On the columns 3 and 4, the pivoting levers 14 and 15 are mounted for movement in the vertical direction. 17. Cylinders 18 and 19 are used to rotate the levers, and cylinders 20 and 21 are used to move in the vertical direction. Brackets 24 and 25, for example L-shaped, are located on the upper molds 22 and 23. Mechanisms 26 and 27 are placed between columns 2, 3 and 4, 5, and mechapisms of disassembly of forms are installed above them on cross-arms 6 and 8. Each of these

The mechanisms include disassembly cylinders 28 and 29, on the rods of which elements of non-periodic connection with the upper half-form are fixed. This element is the crackers 30 and 31, provided with locking pins 32, which enter the holes 33 of the brackets. Based on 1 and / or columns 2-5, rigid stops 34-37 are installed. Cylinders 38 and 39 also roll to the base to fix the pivot arms during assembly and disassembly of the molds by pressing the arms against the stops.

The machine works as follows.

In the initial position, the swivel arms 14 and 15, together with the lower half-molds 16 and 17 placed on them, are at disassembly positions. In this case, the levers are pressed against the stops 34-37 by means of cylinders 38 and 39. The upper half-molds 22 and 23 through the brackets 24 and 25 are suspended to the cracks 30 and 31 of the disassembly cylinders 28 and 29.

At the beginning of the cycle, one of the development cylinders (natrimer 29) lowers the upper half of the mold 23 to align with the lower half of the mold 17. With the further course of the disassembly cylinder 29, the pins 32 emerge from the holes 33 of the brackets 25. Then the cylinder 39 unlocks the swivel lever 15 and the cylinder 19 turns a lever 15 with a form around the column 4 and sets it above the furnace with a metal pipe 9. After that, the cylinder 21 lowers the pivoting lever 15 so that the form sits on the metal pipe. Next, the power cylinder 11 lowers the plate 13 and presses it on the form, not connected to the latter; the mold is in close contact with the metal pipe.

After pouring the metal into the mold and solidification of the casting, the power cylinder 11 returns the plate 13 to its original position. Then the cylinder 21 lifts the lever 15 with the mold, and the cylinder 19 returns them to the development position by turning around the column 4. In this case, the brackets 25 are again above the nut 31, and the holes 33 are above the pins 32. In this position, the casting is cooled.

Next, the cylinder 39 presses the lever 15 against the stops 36 and 37, and the disassembly cylinder 29 starts lifting the cracker 31. The pins 32 enter into the holes 33, and the upper half-form is removed. Then, the casting is removed by known means, and the mold cavity is prepared for the next casting. The second pivot arm 14 and the cylinders 38, 18 and 20 operate in a similar manner, and their operation can start from the moment when the first form is returned to the disassembly position.

subject matter

Claims (2)

1. A low-pressure casting machine containing a frame, a dispensing furnace with metal conduction, casting removal and disassembly mechanisms, a control system, a bottom half-form fixed on the pivoting lever with the ability to move 3 in the vertical direction, and an upper i-shape equipped with a power cylinder placed above the holding furnace, characterized in that, in order to ensure reliability of operation and ease of maintenance, it is provided with a mechanism for fixing a new lever, made in the form of a pressing cylinder and vnopOB, rigidly associated with the bed, with the upper half-mold interacting with the power cylinder through a plate mounted on the rod, and the mold disassembly mechanism is made in the form of a cylinder, on the stem of which the element of a periodic connection is embedded with the upper half-form. 2. The machine according to claim 1. characterized in that the element of the periodic connection is made in the form of a biscuit, which interacts with the brackets mounted on the upper zero line, the pins for connecting with the brackets are rigidly fixed to the brackets through the holes made in them . J & Jff 20 Sz j3 31 25 22