SU742026A1 - Die for producing box-shaped articles - Google Patents

Description

The invention relates to the processing of scrap, in particular to the design of dies for the manufacture of articles by injection. A known stamp for the manufacture of box-shaped products comprising a movable upper plate with a punch, a lower and driven intermediate plate, as well as a matrix l. . The disadvantage of this stamp is the increased consumption of metal on the manufactured product, as well as reduced performance. This is due to the impossibility of obtaining products with uniform; the height of the walls, resulting in the need to use an additional wall trimming operation, resulting in metal loss and a decrease in productivity. The aim of the invention is to increase metal utilization and productivity. This is achieved by the fact that the die matrix is made composite, while its elements intended to form the narrower walls of the product are mounted on the intermediate plate, and the elements of the matrix for forming the wider walls of the product are fixed on the bottom plate. In this case, the drive of the intermediate plate is made in the form of its hingedly connected middle parts with the lower plate of two shoulders, which interact with one shoulder with the intermediate plate, and the other with the stops mounted on the movable upper plate. The drawing shows the scheme of the proposed stamp. On the top plate 1 of the stamp, bolt 2 is fixed to the punch holder 3, to which two bolts: 4 are fixed to the punch 5. Stops 6 are fixed to the top plate by bolts 7. On the bottom plate 8 by bolts 9, a fixed element 10 of the matrix is fixed and ejector pins 11 are mounted. 12 matrix mounted on the intermediate plate 13

by means of bolts 14. The lifting height of the plate 13 is limited by brackets 15 fixed to the bottom plate by bolts 16.

In the bottom plate, bolts 17 secure the drive for lifting the plate 13, consisting of levers 18, with rollers 19 and 2 O. Levers can swing relative to the axes 21 in the brackets 22. The upper plate relative to the bottom is guided by columns 23 and bushings 24. Ninsn plate is mounted on the table of any press having an ejector, and the top plate is attached to the movable press ram.

 The stamp works as follows.

The plate 1 with the punch 5 fixed on it together with the movable press ram moves downward, directed along the columns 23 to the sleeves 24. The workpiece 25 is placed in the matrix element 10. After the contact of the punch 5 with the workpiece 25, and the strength required for deforming, the workpiece metal begins to flow into the gap between the punch 5 and the elements 10 and 12 matripy. At the same time, the stops 8 fixed on the top plate push the rollers 19 and, rotating the levers 18 relative to the axes 21 in the brackets 22, the rollers 2O lift the intermediate plate 13 and the matrix element 12 at a speed ahead of the metal outflow rate of the workpiece in the wall. Since the element 1O of the matrix that forms this part and. Wider side walls of the product, fixedly mounted on the bottom plate 8, the active friction forces act only on the outer surface of the narrower walls of the product and greatly facilitate the flow of metal in these zones.

The deformation of the workpiece occurs until the gap between the punch 5 and the bottom part of the element 1O of the matrix reaches the desired value. Then the top plate together with the punch returns to its original position, and the press ejector, acting on the workpiece through the ejector 11, pushes the product out of the matrix. The brackets 15 limit the movement of the element 12 of the matrix during the ejection of the product. The lifting speed of the matrix element 12 can be varied by changing the size of the arms of the levers 18.

The proposed stamp provides an increase in the utilization rate of

J tal and performance.

F o r

and 3 o b

mule

et e and

A stamp for the manufacture of box-shaped products comprising a movable upper plate with a punch, a lower and driven intermediate plate, as well as a die, characterized by

By the fact that, in order to increase the utilization rate of the metal and the capacity, the matrix is made composite, while its elements intended to form the narrower walls of the product are mounted on the intermediate plate, and the elements of the matrix to form the wider walls of the product are fixed on the bottom plate, with This drive intermediate plate is made in

the form of a ball irri cally connected by its middle parts with the lower plate of two shoulders, which interact with one shoulder with the intermediate plate, and the other with stops mounted on

MOBILE TOP PLATE.

Sources of information taken into account in the examination

1. The collection of technology manufacturing blanks in mechanical engineering, M. ,,

Mechanical Engineering, 1971, p. 90-97.

Claims (2)

Claim 2 ° Stamp for the manufacture of articles with a spherical shape, containing a movable upper plate with a punch, a lower and a drive intermediate plate, as well as a matrix, characterized 25 in that, in order to increase the metal utilization and productivity, the matrix component, and its elements for forming a narrow wall pas mounted woode ₃₀ lija intermediate plate, and the elements of the matrix forming wider walls products are fixed on the bottom plate, wherein the actuator intermediate plate is made in the form of _{March 5} pivotally connected with their middle portions with the bottom plate of two-armed levers, one shoulder cooperating with an intermediate plate, and the other - with a stop E mounted on the movable top plate _40.