SU1763003A1 - Horizontal hydraulic press for crushing non sintered formed powder articles - Google Patents

Description

one

(21) 4856308/33 (22) 04/25/90 (46) 09/23/92. Bul Mg 35

(71) Nytva Metallurgical Plant

(72) O.V. L Dov, D.F. Mansurov, A.V. Popov and Yu.M. Chumanov

(56) Japanese Application No. 54-17971, cl. B 02 C 1/00, 1979.

(54) HORIZONTAL HYDRAULIC PRESS FOR CRUSHING UNBREAKED FORMED POWDER PRODUCTS

(57) Use: crushing equipment for powder metallurgy and for the production of building materials. SUMMARY OF THE INVENTION: a horizontal hydraulic press comprises a frame, a housing with a loading window and a hopper, a tailstock located in the housing, a slider with a press plate, kinematically connected with a power cylinder punch, and hydraulic system controls. The press case has a separate loading zone and a crushing zone, the latter of which has a length of 0.7 ... 1.0 length of the loading zone, with the bottom of the body in both zones made in the form of a grating, and the lower part of the press plate is equipped with a staple knife having a C-shaped plan. In this case, the knife-clamp has a length equal to 0.7 ... 0.9 of the length of the loading zone, and a cutting angle equal to 30. 45 °, and the inner part has a window width equal to 0.8 ... 0.9 width of the load zone. Moreover, the knife-clamp is fixed on the press plate with the help of at least three longitudinal gussets, and the extreme gussets are oppositely inclined relative to the vertical plane with the formation of a narrowing between them in the zone of the no-a-bracket and, in particular, are curved, and the press plate has vertical grooves having a dovetail-shaped cross-section with an angle of inclination of the walls of the grooves 3 ... 150. 4 з п. Ф-лы. 6 Il.

SP

WITH

The invention relates to crushing equipment and can be used in powder metallurgy and in the production of building materials.

A device is known comprising a frame, a cheek with a shaft, a movable and fixed plate with longitudinal separations made the same in height and having the appearance of prisms of different convexity on the movable and fixed plates (USSR author's certificate No. 782859, cl. B 02 C 1/02) .

A disadvantage of the known device is that when crushing large pieces of green molded powder solids, insufficiently shredded large pieces fall into the resulting product.

The closest to the technical essence of the solution is a horizontal hydraulic press for crushing the material, comprising a bed, an inlaying plate installed in the working area, a fixed back head, a punch with a press plate, kinematically connected to the main hydroceleration / indrom having control means hydraulic system, material ejector from the working area with a drive, a movable casing with a lock

with

ny device (for Japan Ns 54-17-971, cl. B 02 C 1/00).

The disadvantage of this device is that after crushing a portion of the material there are large pieces, which, after removing the entire portion of crushed material from the working area, end up in the finished product and reduce the quality of the crushing.

The purpose of this proposed invention is to improve the quality of crushing by eliminating the possibility of non-crushed pieces of powder products entering the finished product.

The goal is achieved by the fact that in a horizontal hydraulic press containing a bed, a housing with a loading window and a hopper, a tailstock located in the housing, a slide with a press plate, kinematically associated with a hydraulic cylinder punch and hydraulic system controls, are separate the loading zone and the crushing zone, the last of which is 0.7 .., 1.0 is the length of the loading zone, with the bottom of the body in both zones made in the form of a grate, and the lower part of the press plate is equipped with a staple knife having in terms of C-shaped.

In addition, the knife-clip has a length equal to 0.7 ... 0.9 of the length of the loading zone and a cutting angle equal to 30 ... 45 °, and the inner part has a window width equal to 0.8 ... 0.9 width loading zones.

In addition, the knife-clamp is fixed on the press plate with the help of at least three longitudinal kerchiefs, the extreme kerchiefs are oppositely inclined relative to the vertical plane with the formation of a narrowing between them in the zone of the knife-bracket and in particular are made curvilinear.

In addition, the press plate has vertical grooves having a dovetail-shaped cross section with an angle of inclination of the walls of the grooves 3 ... 150.

FIG. 1 shows a longitudinal section of a hydraulic press; Fig 2 is a top view with a hopper removed; in fig. 3, 4 - views of the working part of the press plate; in fig. 5, 6 - the shape and cross-section of the grooves on the working part of the press plate.

The hydraulic press contains a frame 1, a tailstock 2, a slider 3 with a press plate 4, kinematically associated with a hydraulic cylinder punch 5. The press body has a loading zone 6 of length 3 and a crushing zone 7 long. The length of the loading zone corresponds to the length of the loading window above which is located the bunker 8. The bottom of the body is made in the form of a grate 9,

Mostly with round holes along the length of both zones, the grate and the back headstock can be made with the possibility of their separation from the casing. Under the grate in the frame there is a path 10 for dumping the finished product into the container 11. On the working part of the press plate 4, the C-shaped knife-clip 13 is fixed with the help of kerchiefs 12.

0 The crushing zone has a length d, selected in the range of 0.7 ... 1.0 of the load length 13, and the knife length n is selected in the range of 0.7 ... 0.9 of the length of the load zone 3. In this case, the width of the inner Parts of the window B0 of the knife-sko5 would be chosen equal to 0.8 ... 0.9 of the width of the loading zone. The cutting angle of the knife-clamp is selected in the range of 30-45 °.

The kerchiefs 12, which fix the knife-bracket, are made vertical. In addition, they

0 may have an inclination relative to the vertical plane. Thus, in FIG. 3 in the housing on the press plate 4 the knife 13 is fixed with the help of a central gusset plate 12 and inclined gussets 15. FIG. 4 shown

5 installation under the same conditions of curved gussets 16.

On the slider 3 it is possible to install the press plate 17 (Fig. 5) with vertical grooves 18, made in the transverse section in the form of 4 dovetail 19 (Fig. 6) with the angle of inclination of the groove wall a in the range of 3 ... 15 °.

The press works as follows. In the initial position, the slider 3 with the press plate 5 and 4 and the knife clip 12 (Fig. 1, 2) are in the extreme right position. The download zone is free. From the bunker 8, the molded green powder products fill the loading zone 6. After the hydraulic cylinder is turned on using hydraulic system controls having any of the known structures, a slider with a press plate and a staple knife cuts off a portion of the products and shifts it to the crushing zone. When portions

5 reaches the tailstock 2; the process of crushing products occurs up to the position of the knife-clamp shown in FIG. 1 dotted line. During the slider retraction process, the crushed particles are escaped through the holes in the grate 9 along the path 10 into the container 11. The back side of the staple knife actively contributes to the efficient removal of particles from the crushing zone. As the slider retracts to its original position, the next portion of products enters the loading zone and the cycle repeats.

It was established experimentally that, depending on the shape and size of the products,

After crushing, it is advisable to change the ratio in the range of 0.7 ... 1.0. It is impractical to make 1D 0.7 3, since the number and size of uncrushed pieces increases significantly, due to the small stroke of the slide. As a result, additional power is required for re-crushing using the following portions of products.

An increase in g 13 leads to additional energy costs per process and impairs screening through the grate. The crushing process is not substantially improved.

The most optimized length of the knife-clamp is (0.7 ... 0.9) I3. A smaller value is required for a short crushing zone. The use of a knife-stapler makes it difficult for a part of products to roll into the crushing zone and reduces the productivity of the press by reducing the load portion. It has been established experimentally that when the cutting edge of the knife-clamp with an angle of 45 ° is executed, a significant increase in the load on the knife is observed in the final crushing phase. A decrease of 30 ° leads to rapid edge wear and also to an increase in the load on the knife scraper.

It was established experimentally that the crushing process is most effective when the width of a portion of loaded products does not exceed 0.9 of the width of the loading and crushing zones. For this purpose, the width of the inner part of the window of the B0 knife-clamp is not more than 0.9 B3. A decrease in 8B3 leads to a deterioration of the crushing process. Improving the efficiency of the crushing process contributes to forming portions with a smaller size at the base. To do this, extreme kerchiefs are made inclined with a narrowing downwards. The best result is achieved with the curvilinear form of the kerchief section.

In the practice of presses and workshop crushers, it is widely known to use alternating protrusions and hollows on the working surface of a press plate. This contributes to the concentration of efforts on the ledges and the intensification of crushing. However, when crushing not very hard materials, such as a molded green powder, such as metals, the depressions often become clogged and the efficiency of crushing by projections decreases. In this technical solution, after experimental verification, it is proposed to perform vertical depressions with a cross section in the shape of a swallow tail with an angle of inclination

walls and 3 ... 15 °. Making the angle a 3 ° does not fully eliminate the effect of particle jamming in the groove. At angles of 6 to 6 ° C, the particles freely fall along the valleys. Increase a. 15 ° drastically reduces the durability of the sharp edges of the protrusions and impairs the crushing process.

Thus, the use of the process of the proposed construction makes it possible to obtain regulated particle sizes for subsequent crushing and fine grinding in standard cone crushers. Using the proposed press allows the rejected and green products to be recycled.

Claims (5)

1. Horizontal hydraulic press for crushing green molded powder articles containing a frame, a housing with a loading window and a hopper, a tailstock located in the housing, a slide with a press plate, kinematically associated with a hydraulic cylinder punch, and hydraulic control means, different the fact that, in order to improve the quality of crushing by excluding the possibility of non-crushed pieces of powder products getting into the finished product, the casing has a separate loading zone and a crushing zone, the last one of which has a length of 0.7 ... 1.0 the length of the loading area, wherein the bottom of the housing in both zones is designed as a grate, and the lower part of the press plates is provided with a knife-bracket having a C-shape in plan view. 2. Press according to claim 1, characterized in that the knife-clamp has a length equal to 0.7 ... 0.9 of the length of the loading zone, and a width of the window of the inner part equal to 0.8 ... 0.9 of the width of the zone load, and the cutting angle of the knife-bracket is selected in the range of 30-45 °. 3.Press popp.1 and 2, characterized in that the knife-bracket is fixed on the press plate with the help of at least three longitudinal gussets, and the extreme ones of them are oppositely inclined relative to the vertical plane with the formation of a constriction between them. 4. A press according to claim 3, characterized in that the extreme kerchiefs are curved in height. 5. The press according to claim 1, characterized in that the press plate has vertical grooves in the shape of a dovetail with an angle of inclination of the groove walls of 3-15 °. I am 6. # , / // Pwr. I    , s, "/ t It Cpur.S. e Fng.Z / 6 N // / ./five 9yG.4 but / P / FIG 5 J9 / 70 . b