SU893574A1 - Driveof central bar to apparatus for pressing hollow articles - Google Patents

Description

(54) DRIVE OF THE CENTRAL ROD OF THE DEVICE FOR PRESSING OF THE COMPLETE PRODUCTS

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FIELD: machine building. and can be used in powder metallurgy in the manufacture of hollow articles from powdered materials.

A known drive of a central rod of a device for pressing hollow articles, containing power cylinders with rods 11, which are stirred on the body.

The disadvantage of such a drive is the inability to communicate axial vibrational mixing with a high frequency, which contributes to its better compaction of the pressed material, which limits the range of pressed products.

The purpose of the invention is to expand the range of extruded products.

This goal is achieved by the fact that the drive is provided with a crossbar spring-loaded in the direction of movement of the central rod mounted on the central rod and pivotally connected to the rods, while the power cylinders are fixed to the housing.

FIG. 1 shows a central rod drive; in fig. 2 - the lower part of the device for pressing hollow articles; in fig. 3 is a view A of FIG. 2

The drive of the central rod 1 is mounted in the pressing device 2 in its lower part. The Central rod is placed in the hole of the lower punch 3, passes through the rod 4 of the piston 5 and through the fitting 6, passed through the cover 7 of the power cylinder 8.

The lower end of the central rod is connected to a cross-member 9 pivotally connected to the rods 10 and 11 of the pneumatic cylinders 12 and 13 mounted on the device body 14. Cross bar 9, besides the 10 th one, rests on springs 15 and 16 mounted on rods 17 and 18 installed in the device case. The cross-section through the cams 19 and 20 interacts with the limit switches 21 and 22, electrically connected with the control system (not shown). The device also contains a product 23 and, accordingly, piston and pinhole cavities 24 and 25 of the power cylinder 8, a die 26, and also a nut 27 of the central rod.

The drive works as follows.

20

After punching by supplying energy (liquid) to the piston cavity 24 of the power cylinder 8, the piston 5 with the rod 4 and the associated lower punch 3 rises up and pushes the product 23 out of the matrix 26. When the product is ejected from the matrix, the central rod clamped by the pressed product together with the lower punch 3 and the cross bar 9, they move upwards by the stroke of the lower punch, which performs the function of the ejector, and then with the help of pneumatic cylinders 12 and 13, the central rod moves to its lowest position. In this position, the upper end of the central rod is aligned with the plane of the matrix. In the backfilling process, drip on command from the control panel (not shown), the pneumatic cylinders perform a certain

the number of moves is up and down, whereby matrix 26 is properly filled with a powder. In this case, the lowering of the central rod with the cross bar is due to the effort of the springs 15 and 16

Lindra fixed on the case.

Sources of information taken into account in the examination I. USSR author's certificate

Claims (1)

No. 593932, cl. At 30 V 11/06, 10/08/76. At the end of the filling of the matrix with a powder of the spring 15 and 16, the nut 27 is pressed against the lower end of the lower punch, which is at that time in its lowest position. The invention drives a central rod of a device for pressing hollow articles containing power cylinders with brushes placed on a housing, characterized in that, in order to expand the range of compressible products, it is provided with a cross-member spring-loaded in the direction of movement of the central rod mounted on the central rod and connected with brushes, while power chi