SU835602A1 - Automatic machine for flaskless moulding - Google Patents

Description

one

The invention relates to foundry, in particular, to equipment for flaskless molding of molds and cores.

A known machine for flaskless molding, comprising a frame with press cylinders mounted on it with model and press plates, a sandblasting unit for feeding the molding sand, a mechanism for assembling ready-made molds, a shuttle with press cameras 1 fixed on it.

The disadvantage of this machine is the complexity of the design.

Also known is an automaton for making non-flask molds, which includes a sanding head on the side of the blow hole, to which the flask is rigidly attached, and model press and ejector plates with actuators; The shotbore head with the flask is installed rotatably from the reversing drive relative to the vertical axis, and the model-press plates are located perpendicular to the direction of ejection of the finished form 2.

A disadvantage of the known devices is the design complexity.

The purpose of the invention is to simplify the design and synchronization of the mechanisms.

This is achieved by the fact that the drive of mechanisms is made in the form of a push rod-type mechanisms with radii of cranks providing technological sequence of operation of the mechanisms of the machine connected respectively to the gate of the loading device, press plates, the gate of the fixed flask and the pushing plate located under the flask, as well as the pneumatic cylinder platform, control valve which is connected by a lever mechanism to the ejector plate.

FIG. 1 given kinematic scheme of the automaton; in fig. 2 - diagram of the operation of the mechanisms of the machine in the manufacture of flaskless molding.

The machine consists of a loading device 1 with a gate 2, a fixed flask 3, a model-press plate 4, a gate 5 that forms the bottom of the flask and provides form to the guide groove 6, an ejector plate 7 located under the flask, a pneumatic cylinder 8 with a platform 9, shafts 10 with connecting rod and crank

mechanisms 11, installed at different angles and with different radii of curvatures, driven sprockets 12, drive 13 with a leading sprocket, chain gears 14, control valve 15 and lever

mechanism 16.

The machine works as follows.

When the driven sprockets 12 rotate, the shafts 10 use the connecting rod-crank mechanisms 11 (the position of Fig. 2) to transmit movement to the gate 2, during opening of which the molding mixture is fed into the flask 3, and the model press plates 4 move towards each other, and the gate 5 overlaps the lower window of the flask.

At this time, the mold made in the previous position is on the platform 9 of the pneumatic cylinder 8 in the lower position and the ejector plate 7 begins to move it along the guide groove 6.

With further rotation of the shafts 10, the gate 2 (position b in Fig. 2) overlaps the loading device 1, the model-press plates 4 compact the form from two sides, the ejector plate 7 completes pushing the finished form and starts moving in the opposite direction. At the same time, the crank-crank mechanisms and gate 5 prepare it for opening the lower window of the flask 3.

Rotating further, the shafts 10 continue to move the gate 2 (position in FIG. 2) in the direction of the loader 1, using the mechanisms 11, the model-press plates 4 move in the opposite direction, pulling the model, the ejector plate 7 continues to return to The initial position and with the help of the lever mechanism 16 acts on the control valve 15 by the pneumatic cylinder 8. As a result, the platform 9 rises to the extreme upper position. At the same time, the gate 5 opens, the control valve 15 is switched, and the mold from the flask is made

2 is released to the platform 9 at the bottom level directed to the sh) of its groove 6.

With further rotation of the shafts 10, the gate 2 (the stop g of Fig. 2) is prepared by moving in the opposite direction to the opening of the loading device 1, the model-pressing plates 4 move towards each other, the gate 5 overlaps the lower window of the flask 3.

0 Plate 7 moves in the direction of ejection.

Further rotation of the shafts 10 provides a continuous repetition of the described cycle.

Claims (2)

1. The design of the company "Henry Wallwork, England, 1968. 2. Authors certificate of the USSR dgo 444602, cl. In 22C 11/10, 1972.