SU710756A1 - Machine for vacuum moulding - Google Patents

Description

I

Isofetenation refers to foundry and is intended for the manufacture of casting molds from dry molding materials. By vacuum molding

A known machine for vacuum molding of casting molds in which only one half-mold is molded, and the flasks can only be with a vertical connector, due to the arrangement of the model plate and the charging device.

A known machine for vacuum forming, in which submodel plates with the possibility of raising and lowering them are located on the rotary and 1x horizontal plane of the carousel. At one position, only the film is tensioned onto the model, and to fill the half-form with sand, it is rotated to the second position, located under the roller table and bunker, by rotating the carousel. Flasks are delivered to the same position by a special edge roller conveyor. The film is fed to the model by a mechanism for tensioning the film; it is made by the 1HM in the form of a vacuum suction device, moved by a chain drive, and a vertically movable frame device and a heater. The outer film is applied manually after filling the flask with a dry mixture from a hopper. The finished half-form is discharged from the machine on a roller table 2j.

This machine is complex in design of a rotating carousel that carries the subframe plates and transfers the half-form from the tension position, the film to the model to the filling position, and also due to the push-pull transfer of the film to the model. In addition, a special edging roller conveyor is required for feeding the flasks.

Known. a vacuum forming machine containing a base on which a work table with a model plate, a sealing film feeding mechanism 1 and a molding sand supply device located above the work table are mounted on a working axis with a model plate;

A disadvantage of the known machine is that in it the flasks can only be fed to the horizontal plane.

The purpose of the invention is improving the condition of servicing the machine.

This goal is achieved due to the fact that the machine is equipped with a second model plate, mounted on the working table on the opposite side of the first model plate, and the device for feeding the molding sand is made in the form of a rotary around the vertical axis of the sleeve.

The drawing shows schematically a vacuum forming machine, a general view.

On base 1, a work table 2 is rotatable around a horizontal axis with sub-model bases 3 and 4 on which model plates 5 and 6 are fixed with attached vibrators 7. In the upper part of the frame there is a bunker 8, to which a hinge is attached. with a vertical axis attached sleeve 9 with a bolt 10, in the off position retracted from the model plate. Mechanisms II for supplying a sealing film are made in the form of a frame-sucker 12, driven by a crank mechanism 13 mounted on the rack 14 of the base 1. Under the mechanism 11 there is a film holder 15, also made in the form of a frame-sucker E: fixed on the rack 14. Base 1. On the back side of the film holder 15, a film feeder 16 is fixed, and on the front side there is a film cutter 17, made in the form of a stretched wire heated by current.

The machine works as follows.

The mechanism 11 carries the prepared model plate 5 bottom. When transferring the film from the feeder 16, its next part leaves. With the trailing edge of the frame-sucker 12 of the mechanism 11, the film is placed on the film holder 15 and on the cutter 17. A vacuum is created in the holder 15, the cutter 17 is heated by current and burns through the film. The mechanism 11 with the cut off section of the film passes to the model plate 5, and the next section of the film is attached to the holder 15, the Mechanism 11 rises onto the model plate, which is partially partially wrapped around the model film. In the submode 3, a vacuum is created, whereby the film fits the model tightly. In the mechanism 11, the vacuum is released and it returns to its original position on the holder 15. The mold 18 is installed on the model plate 5. After this, the sleeve 9 with the bolt 10, turning in the hinge, is installed above the flask 18 and the flask is filled with sand from the hopper 8, At the same time, the mixture is compacted with the help of vibrators 7. After filling the sand box with sand, sleeve 9 with valve 10 is retracted to its original position. With the help of the mechanism 11 on the flask, the outer film is tensioned similarly to the tension of the film on the model. At the same time, the next part of the film is sucked to the holder. After the film has been applied to the mold counter 18, a vacuum is created in it, and in the mechanism 11 and the model plate 5, the vacuum is released. The mechanism 11 is retracted to the holder 15. The bottom half of the mold is ready. After removing the mold half, for example with a crane, the worktable 2 is rotated around a horizontal axis by 180 model plate 6 of the top is placed on the forming position and the operations for making the mold half are repeated.

Claims (3)

1. Japanese patent number 5O-24888, cl. B 22 C 9/02, 1975. 2. US patent JsT 3843301, cl. B 22 C 17/04, 1974. 3. For the name of the Federal Republic of Germany No. 2548348, class B 22 C 17/10, 1977. eight