Mold for pressing of powder products with the outer surface of complex shape

 

(57) Abstract:

The invention relates to the mold for extrusion of powder products with the outer surface of complex shape. Essence: after filling the forming cavity powder hole closes a split upper punch 1. When the application efforts press the upper punch pushes in front of a moving ring 4 and the powder is moved into the cavity of the punch, which is its split parts in the fixed ring 3, preventing the divergence of wedges: original powder is compacted under a floating bottom punch 8 and partially flows into the spherical cavity of the punch. By means of the frictional force of the compression powder sliding ring 4 is entrapped in the space between the latter and the rod 7 and is condensed. Floating punch 8 under the influence of elastic forces moved down, feeling countering the bottom of the spring element 10. At the end of the pressing of the upper punch 12 displaces the sliding ring 4 beyond the forming cavity and produces the final compression of the powder into the desired product shape. The mold used for the molding of articles having outer transitions in height and curved surfaces. 1 Il.

Known mold for molding articles from powder [1], consisting of an upper punch, coaxially with the upper punch holder, in the case where the stationary ring, the matrix, coaxially with the upper punch of the lower stationary punch, the lower floating punch, with a spring element and placed on the lower stationary punch slidable relative to it. The presence of fixed and floating lower punches allows to obtain products with external transitions in height.

A disadvantage of the known devices is the inability to manufacture products that combines both external transitions in height and curved surfaces.

The closest to the invention by the technical nature of a mold for molding articles from powder [2], including split upper plug, coaxial with the upper punch holder, in the case where stationary ring and moving relative to the stationary ring, with a spring element, coaxially with the upper and lower stationary punch.

A disadvantage of the known designs is the inability to manufacture products, which has also a curved poverhnostyu with the upper punch holder, in the case where the stationary ring and moving relative to the stationary ring, with a spring element, coaxially with the upper punch of the lower fixed plug, the axis of which is placed a rod, the lower floating punch, equipped with two spring elements and placed on the lower stationary punch slidable relative to it.

The slip ring holder is made with a ring on the length of the cavity, the diameter of which is equal to the outside diameter of the flange portion of the floating punch and is further provided with placed in said annular cavity two spring elements.

The presence of the circular cavity allows you to place it lower floating plug located between the two spring elements, which provides the possibility of obtaining products having outer transitions in height, while the condition of raveplanet in different sections of the product. At the same time provides the possibility of obtaining this product a curved surface.

Known as the design of the mold [2] does not allow us to manufacture products containing both external transitions in height, Slovenia, the right part is in the position of removing.

Mold consists of a slotted upper punch 1, coaxially with the upper punch holder 2, in the case where the fixed ring 3 and the sliding ring 4, with a spring element 5, coaxially with the upper punch of the lower stationary die 6, the axis of which is placed a rod 7, the lower floating punch 8, provided with two spring elements 9 and 10, and the base of the mold 11.

Mold is as follows. After filling the molding cavity with the powder hole closes a split upper punch 1, playing in the final stage of pressing the role of the matrix. When the application efforts press the upper split punch, moving down, pushes in front of a moving ring 4 and the powder is moved into the cavity of the punch. When this punch for its split parts includes a stationary ring 3, preventing the divergence of the wedges.

First of all the powder densification starts floating bottom punch 8 and the powder partially flows inside a spherical cavity split punch. When the powder will completely fill the cavity of the upper punch, begins compression of the powder. When the compression paraskenia pressed powder sliding ring 4 is entrapped in the space between the ring 4 and the rod 7 and is condensed. The lower floating punch 8 under the influence of elastic forces moved down, feeling countering the bottom of the spring element 10.

At the end of the pressing of the upper punch displaces the sliding ring 4 beyond the forming cavity (the floating movement of the bottom punch 8 down because available on the lower stationary punch 6 annular ledge terminates and produces the final compression of the powder in article 12 of the required form. While pulling the product together with the upper punch out of range of the stationary ring 3, slotted part of the plug apart and detail freely extracted from it.

The use of the invention allows manufacturing of a product that combines both external transitions in height and curved surfaces, for example packagefilename sprayers, used for cooling of the ingot in machines continuous casting. It extends the functionality of powder metallurgy, reduces cost while improving the quality of products containing external transitions in height and curved surfaces.

Mold FOR PRESSING OF POWDER PRODUCTS WITH OUTER SURFACE is e in the case of the stationary shroud ring and moving relative to the stationary ring with a spring element, coaxially with the upper punch of the lower stationary punch, placed along the axis of the last pin, the lower floating punch with two spring elements placed on the lower stationary punch slidable with respect to it, characterized in that the lower floating punch made with flanges on its outer surface, and a sliding ring is made with an annular cavity along its length, the diameter of which is equal to the outside diameter of the flange portion of the floating punch, and with two extra springs housed in its annular cavity.

 

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Stamp // 2019358

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