SU490686A1 - Device for pressing powder products - Google Patents

Description

The invention relates to equipment for pressing articles with internal cavities from powder.

The known devices for pressing articles made of ioroshka contain a matrix, a vertical punch and several lower punches concentrically arranged relative to each other, supported on a movable plate, on which rests are placed with wedges that determine the position of the lower punch, which forms the internal cavity, and the wedge rigidly connected to the central lower punch.

The disadvantage of these devices is the low durability of the lower punches, which are exposed to high frictional forces when ejecting the finished product.

The proposed device differs from the known one in that a wedge, a moving movable stop, is rigidly connected to the central lower punch, which allows the lower punching of the inner cavity-forming product after the ejection of the product to be lowered.

FIG. Figures 1-4 illustrate the proposed device at the positions of the backfill, the end of the extrusion, the ejection of the product, and the withdrawal of the lower punches.

On the plate / (fig. 1) a top punch 2 is fixed. In plate 3 a matrix 4 is attached,

which the iipecc is filled up. The lower punch 5, which defines the greatest height of the product, is attached to the plate 6, which is rigidly connected to the pin 9 by means of 7 8 racks. The lower nyaiicoH 10, which forms the internal NOLA product, is attached to the plate //. The position of this slab is determined by the length of the gg 12. The springs of the 13 s tend to lower the slab //. But the plate 9 can move the movable stops 14. The springs 15 reduce these stops to the center. The upper end of the rod 16 is made in the form of a valve. A core 17 is rigidly attached to the rod 16, forming a through hole in the product. This rod is associated with a separate lineage of the machine (not shown in Fig.).

Nlita 5 by the springs 18 is pressed against the fixed stops 19 of the machine bed. The columns 20 direct the plates / and P relative to the plate 3. The plates 1 9 are connected to the drives of the machine (not shown in Fig.).

Rollers 21, interacting with wedges of the rod 16, are fixed on the movable stops.

Before the press starts, one of the most famous methods is used to press the pressing arm 5 into the matrix 4. Then the press drive lowers the plint / with the upper punch 2. The upper punch draws into the matrix 4. When the upper punch of a certain way reaches, the force of compression arises on the upper flat of the lower punch 10, leads through the slab // and the gu 12 plate 3 downwards until the plate // comes into contact with the movable lugs 14 (Fig. 2). In this case, the lower punch 10 occupies a position that corresponds to its end of the pressing process 1i. The upper punch 2 produces the final extrusion of the product. The upper punch is then raised by a press drive (Fig. 3). The plate 5 together with the matrix 4 under the action of the springs 18 follows the upper punch before the contact of the plate 3 with the stops 19 of the bed. The drive of the press pusher moves upward plate 9. In this case, the product is pushed out of the die simultaneously by lower punches 6 and W. Punch 6 is driven through plate 7 and pillars 8, and punch 10 through plate // and movable holes 14.

At this time, the pizhioya paneoi 17 is freed from the press drive and, due to the friction of the compressed product, moves together with the latter. At the end of the ejection, the punch 6 is at the level of the upper plane of the matrix 4. The product, completely ejected from the matrix, expands and releases the punches 10 and 17. The press drive leads down the stem 1.6 (FIG. 4) and the punch 17 associated with it. Wedge, located on the top.

The end is erased on 16, spreads the fixed stops 14, and the plate 11 with the punch 10 under the action of the spring 13 goes down. All lower punches are set at the top of the die. The product is removed from the press zone by one of the known methods. After that, the press drive lowers the plate 9 to its original position. The punch 6, rigidly connected to the plate 9, occupies the lower position. The punch 10 is immersed by the action of the weapon 13 and is lowered into a position determined by the length of mt 12. The movable stops 14 under the action of the circle 15 are set to the initial position.

Thing

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A device for pressing powder articles, comprising a die, an upper punch and several lower punches concentrically arranged relative to each other, supported on an iodine plate, on which are placed wedges that move with wedges, defining the position of the lower pupson product that forms the cavity, characterized in that wedge hard to increase tool life

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