SU62571A1 - Vertically closed casting conveyor - Google Patents

Description

In the foundry practice, vertically closed conveyors with carriages carrying flasks are known.

The proposed conveyor belongs to this type of conveyor, but differs from them in that the platforms of the carts are equipped with folding articulated cross-arms, which, when rotated, seize the lower flasks by special protrusions and thereby firmly fasten them with the platforms. In addition, the platforms are equipped with retractable brackets that press the upper flasks against the lower ones.

FIG. 1 shows a general view of a casting conveyor with a cleaning conveyor located under it; in fig. 2 shows a general view of the carts when they are located on the upper branch of the conveyor; in fig. 3-support cart; in fig. 4 — device for fastening both halves of the flask with staples; in fig. 5 - device for automatic lifting of staples.

The foundry conveyor, which is a vertically closed conveyor, moves the casting molds and has a device for automatically performing the following operations: fastening the two halves of the flasks before pouring the molds, knocking the castings from the castings and the ground, returning the empty flasks to the original forming sites.

The device allows the use of flasks of any size. The conveyor consists of two, one below the other branches of the direct paths b and 7 along which the trolleys are continuously moving.

The upper branch of the conveyor is designed to serve the molding and casting areas, the lower branch is used to cool the molds and knock out the flasks.

Accordingly, the branches of the conveyor are located in two different floors of the building, and the floor cover 8 separates the room with harmful technological processes from the rest of the rooms.

The mold is assembled on the upper branch of the conveyor. During the assembly process, the bottom flask 4a is attached to the trolley by a pair of pivoting beams 2. Then, after installing the upper mold half 4, free-hanging brackets 3 are placed on the trunnions of the flask.

No. 62571

Assembled forms 4-4a assembled in this way move the conveyor to the pouring. On the way of their movement, under the upper branch of the conveyor, an automatic device is positioned (Fig. 5), with the action of which the brackets are pulled down to the carriage and thus the half-shapes joined together are firmly attached to the platforms of the carriages.

In this way, the preparation of the molds for casting is simultaneously ensured, and the possibility of displacing the molds is eliminated. Half-shells are also prevented by centering pins that are in the flasks from mutual lateral shear.

Moving continuously on the carts, the molds, after pouring metal into them, approach the front end of the conveyor (Fig. 1). Here, having described a semicircle on its way, the forms are transferred to the lower, returnable branch of the conveyor. Holding now in a suspended state with the help of brackets and traverse, the forms together with the carts pass the cooling zone in an overturned position.

Thanks to the automatic adaptation set in this place of the path (Fig. 5), the retention of supporting brackets is released. Staples, and together with them the half-form // suspended on them, are lowered for some distance downward (Fig.).

The other half-form, which adjoins the trolley directly, continues to be traversed — and remains at the same level of movement. Lowering the mold with the mold on the brackets // carries the casting 5. The center of gravity of the mold half // in this position is higher than the support, the flask turns on its trunnion 10, and the ground in it burned and the casting 5 falls on the clearing conveyor.

At the same time, the conveyor carriage enters the vibrating section of the rail, which is disconnected from the rest of the way by rubber pads in order to avoid transferring labor to the mold. Under the action of vibration, all the remnants of the earth are separated and fall onto a cleaning conveyor installed under the conveyor. According to the device, this conveyor is an ordinary vibrating long smooth table 12, widely used in practice, with a wide-link chain continuously moving on it. Castings, frets on the chain, it is diverted to the end of the conveyor. Vibration conveyor provides with a good separation of the earth from the castings. Dropped from the flasks, as well as the earth showered from the castings, are captured by chain links and, through holes drilled in the lid of the table 12, are scraped down into the bins 13.

Empty flasks, continuing their movement along the lower branch of the conveyor, enter the chamber, where they are subjected to the action of a pressure water shower. Here, the remains of the earth are finally washed away and the general cooling of the flasks takes place.

Moving further and approaching the rear end of the conveyor, the trolleys meet an automatic lifting device (Fig. 5), which, gripping the brackets, tightens and closes the flasks hanging on them. Flasks, drawn to the trolley, go to the final rounding of the conveyor from the lower branch to the upper branch of the path and, again in this way, the staples and flasks are released, now free lying on the conveyor, returning to the molding jobs.

FIG. 2, one of the carriages (left) is not loaded and the traverse beams 2 which are laid on its side are visible. The other cart is loaded with a ready-made form consisting of two flasks 9 and 9a. In this last case, the traverse 2 is rotated by 90 °, occupying a vertical position. The traverse is firmly fastened to the trolley with the help of a swivel 14 and, when rotated into a vertical position, it lends itself to the protruding shelf 16 of the bottom flask. In the drawing, also the hanging bracket 3, is mounted on the trunnion 10 of the upper flask.

The bracket is made of round steel and freely passes through the slots 15 in the trolley. In its lower position (in Fig. 2 on the left), the bracket is held by the head 17, which is integral with the body of the bracket. The restriction for the exit of the bracket from the cart upwards is its side process / 8.

The cart in FIG. 3 is depicted at the moment when it passes along the lower branch of the conveyor. Here, in addition to the usual parts, namely the pull chain 19, struts 20-20a and wheels 21-21a, there are two latches 22 with a roller 23 at one end and a wedge 24 at the other end. The location of the suspension brackets 3 is also shown. In the middle part of each bracket there is a cross member 26, which allows, after the bracket is pulled into the cart (in Figure 3 upwards), to bring the wedge-shaped end of the valve under it and thereby carry out the above-described mounting of the flasks.

The valves are designed so that, under the influence of external pressure on the rollers 23, they move in their guides either engage with the clips or, when pressed on the rollers in the opposite direction, disengage and release the brackets.

The fixture that carries out such pressure on the roller is shown in FIG. 4 and represents two arcuate spring tires 25, fixedly fixed by means of racks 28 to interfloor beam 27. When the conveyor carriage is moving, the rollers 23 of the valves meet 25 of its way and, under them, experience lateral pressure. As a result, the rollers, and with them the valves, are moved apart to the sides. Tires with adjusting screws 29 can be moved apart to the desired width. This precisely sets both the moment of action of the device and the strength of attachment of the forms on the conveyor.

Another automatic device, not shown in the drawing, similar to that described, but differing from it only in the direction of the women, is installed on the lower branch of the conveyor. I act on the rollers of the valves in the opposite direction, it produces in the proper place of the conveyor a pull of the valves and the release of the clips. FIG. 5 shows the fixture installed at the end of the conveyor and intended for automatic lifting of the staples 5. The fixture consists of two obliquely set and fixedly fixed parallel rails 30. When the trolley is moving / in the direction indicated in the drawing by the arrow, the bent ends of the staples 3 enter the rails 30 and, slipping on them, go upwards on an incline. This makes it possible to raise to the desired height of the brackets locked by the valves and supporting the flasks.

Subject invention

Claims (3)

1. Vertically closed casting conveyor with trolleys for flasks, characterized in that the platform of the trolley is equipped with folding 1-hinged crossbars, designed to grip the lower flasks by special protrusions, and pull out the upper flasks with the lower ones. 2. The form of the casting conveyor according to claim 1, which is designed so that curved spring-loaded straps acting on the wedge-shaped latches intended for their opening are applied to tighten the pins of the staples applied to the pins and their release. for entering into the holes of the brackets, and when shifting - for releasing the latter. - 3 -Jvib 62571 №.62571 3. The form of the casting conveyor in PP, 1.2, characterized in that parallel inclined rails interacting with the side branches of the brackets are used to automatically raise and fix the position of the brackets together with the flask suspended from them.  ilf --iVt, -4 j i-- 9ig 5