DK148621B - METHOD AND APPARATUS FOR MACHINERY MANUFACTURING THE BRICK WRAPPED WITH A CORNED MATERIAL, PRINCIPLY SAND - Google Patents

Description

U8621 i

BACKGROUND OF THE INVENTION The present invention relates to a method and apparatus for making bricks mechanically sprinkled with a grainy material, preferably sand, and of the kind set forth in claim 1.

In prior art apparatus of the kind in question, the clay pieces delivered by the feeder to a conveyor belt are inserted under the grain conveyor feed device of the conveyor belt, which then delivers the clay pieces to mold boxes, the clay pieces simply falling into the boxes at the end of the conveyor belt.

The longest time of the appliance's workstations is the release of a clay piece. Consequently, the conveying speed of the conveyor belt must be carefully adjusted to this, so as to avoid stretching or compression of the clay released. However, it is desirable that the clay pieces be delivered to the mold boxes as soon as possible, as otherwise there is a risk that the pieces will adhere to the tape. Therefore, it is desirable that the belt has a higher feed rate than the capacity of the feeder allows.

The object of the invention is to provide a method which allows the clay pieces to be delivered to the mold boxes as soon as possible after the sprinkling without changing the capacity of the feeder system.

This is achieved according to the invention by the method of claim 1. This results in the fact that the first - short conveying path can operate at a feed rate adapted to the feed capacity, while the clay pieces are passed past the feed device for the grained material and further to the mold boxes of a second conveying path with a larger feed rate.

The invention also relates, as mentioned, to an apparatus for practicing the invention. This is in accordance with the invention as embodied in claim 2.

2 148621

In this design, the transfer of clay pieces from the first conveyor path to the second and later on to the mold boxes is achieved very softly. This is very important because of the inelastic consistency of the clay. The parallel-running belts in each conveying path provide a relatively large support surface so that there is no risk of deformation of the soft clay pieces during feeding.

According to the invention, it is advantageous for the apparatus to be designed as claimed in claim 3.

The invention will now be explained in more detail in connection with the drawing, which schematically shows an apparatus according to the invention.

The drawing shows a feeder unit 1 with a pressing-out opening 2, from which clay pieces 3 are delivered. Below the aperture 2 is a first conveyor path 4 consisting of several parallel conveyor belts arranged parallel to one another. The delivery end 6 of the conveyor path 4 can be raised and lowered as indicated by a double arrow.

A second conveyor lane 7, which also consists of conveyor belts 5, is so coordinated with the first conveyor lane 4 that the two conveyor lanes partially overlap when the first conveyor lane 4 is lowered.

Above the second conveyor path 7 is a feeding device 9 for sand or similar material, and at the rear end of the web there is a gripping mechanism 11 with fingers projecting into the space of the second conveyor path 7. The gripping mechanism 11, in a swinging motion, lifts clay pieces 3 up from the conveying path and delivers them after a turn in the molded conveyors 12 stepwise in the conveying paths.

The mold boxes 12 are passed under a scraper 13, for example consisting of an endless V-belt 14, which transports up clay projecting clay over the mold edge away from the mold boxes 12.

Claims (3)

1A8621 After the stripper, the mold boxes 12 are passed under a pressing device 15, where only partially filled mold boxes are refilled. The device works as follows. When a clay piece 3 is delivered by the feeder 1, the first conveyor path 4 operates at a speed corresponding to the pressing. When a predetermined amount of clay, corresponding to a certain length of the clay piece on the conveying web 4, is extruded, the opening 2 is appropriately closed, for example by means of a photocell. At the same time, the clay piece is cut at the opening 2 by means of a thread and the first transport path 4 is lowered. Hereby, the clay piece is transferred to the second conveyor path 7. During extortion of the next clay piece, the said clay piece on the second conveyor track 7 is sprinkled with sand from the feed device 9. When the sprayed clay piece reaches the end of the second conveyor path 7, it is lifted by the gripping mechanism 11. and delivered in a mold box 12. The gripping mechanism 11 then immediately returns to the initial position in which the fingers are located between the conveyor belts. Hereby, the conveying movement of the second conveying web 7 is triggered, which means that the conveying of the clay pieces is resumed. Each of the clay pieces present on the other transport track is followed by a step forward. The stepwise feeding of the mold boxes is also controlled by the gripping mechanism, which is activated by the clay piece which is to be lifted. When the clay pieces 3 are stripped or the mold boxes 12 are refilled, the clay pieces are dispensed in an unloading mechanism not shown and transferred to drying chambers. Claims. A process for machine-making bricks sprinkled with a grainy material, preferably sand, wherein clay pieces delivered from a feed plant are incrementally passed by one transport mechanism past a feed device for the grained material and then delivered to mold boxes conveyed under the transport mechanism. , characterized in that the clay pieces (3) from the feeder (1) are delivered to a first conveying path (4), that the first transport path (4) with a passport. sending time intervals is lowered, thereby delivering the clay pieces to another conveying path (7), passing the clay pieces (3) on the second conveying path (7) stepwise past the delivery device (9) and advancing to a gripping mechanism (11), the mechanism (11) lifts the clay pieces (3) from the conveying path (7), reverses them and delivers them in its own mold box (12). Apparatus for carrying out the method according to claim 1, which comprises a feeder (1) for dispensing clay pieces (3) individually to a transport mechanism (4, 7), on which the clay pieces are passed stepwise past a supply device (9). ) for grained material and up to the mold boxes (12) conveyed below the transport mechanism (4, 7), characterized in that the transport mechanism (4, 7) comprises a first transport path (4) and a second transport path (7), which are used consecutively in the feed direction of the clay pieces, each consisting of parallel, spaced conveyor belts (5), that the rear end (6) of the first conveyor path (4) can be lifted off and lowered to a ... a position where the belt (5) of the two conveyor paths (4, 7) interacts and that at the rear end of the second conveying path (7) there is a gripping mechanism (11) arranged to be able to lift the clay pieces (3) from the conveyor anen (7), flip them over and deliver them in.-each of their mold boxes (12). Apparatus according to claim 2, characterized in that the gripping mechanism (11) has about a horizontal axis pivotable arms, which in one extreme position protrudes between the belts (5) in the other transport path (7).