Height-compensating middle die for powder metallurgical products

Abstract

The utility model relates to a height compensation middle die for powder metallurgy product, including middle die body, the middle part of middle die body is equipped with the matched forming die cavity with the shape of forming product, is equipped with the powder increasing groove at the special-shaped part of forming die cavity for the powder compensation of forming product here, the utility model discloses the powder increasing groove of original middle die, makes it compensate the powder of low place when filling, makes the height size of forming product all keep on the tolerance upper limit, and the die changes little, but can effectively solve the quality problem practicality is very high, and debugging time greatly reduces, and the actual production feedback two sizes do not conflict, all can guarantee the middle limit, and the product corner place also increases due to the improvement density, strength, avoids the corner missing and the piece dropping.

Description

Technical Field

[0001] This utility model relates to the field of powder metallurgy mold technology, specifically to a medium mold that improves the height of powder metallurgy products and solves the problem of asynchronous height differences in products. Background Technology

[0002] For some products that involve two heights during molding, one height dimension is at the lower limit and the other is at the upper limit during pressing, and the two dimensions cannot be synchronously within the middle limit of the tolerance. For example, if the dimensions fluctuate during the production process, one dimension will exceed the tolerance range.

[0003] Based on the fact that the height tolerance of such products can be improved simultaneously in the middle limit, this utility model proposes a height compensation middle mold for powder metallurgy products. Utility Model Content

[0004] The purpose of this invention is to overcome the problems existing in the prior art and provide a height compensation mold for powder metallurgy products. The original mold is modified by adding a powder-increasing groove, which compensates for the powder in the low-height area during filling. When there is more powder, the height will naturally increase.

[0005] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution: A height-compensating intermediate mold for powder metallurgy products includes an intermediate mold body, wherein a forming mold cavity matching the shape of the formed product is provided in the middle of the intermediate mold body, and a powder-adding groove is provided at the irregular part of the forming mold cavity for adding powder to the formed product at this location.

[0006] Furthermore, the powder-enhancing groove is formed by sinking to a certain depth along the edge of the forming mold cavity.

[0007] Furthermore, the powder-enhancing groove settles along the outer edge of the forming mold cavity.

[0008] Furthermore, the powder-enhancing groove is located at the corner of the forming mold cavity.

[0009] Furthermore, the settling depth of the powder-enhancing tank is 6 mm.

[0010] The beneficial effects of this utility model are: This invention adds a powder-enhancing groove to the original mold, which compensates for the powder in the lower part of the height during filling. This ensures that the height of the formed product can be kept within the tolerance limit. The mold is not significantly modified, but it can effectively solve the quality problem and is highly practical. The debugging time is greatly reduced. Actual production feedback shows that the two dimensions do not conflict and can both be guaranteed to be within the tolerance limit. The increased density and strength at the corners of the product also prevents corner chipping and breakage. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Schematic diagram of the RR section; Figure 3 for.

[0012] The labels in the diagram are as follows: 1. Mold body, 2. Molded product, 3. Molding cavity, 4. Powder-adding tank. Detailed Implementation

[0013] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0014] like Figure 1 and Figure 2 As shown, a height-compensating intermediate mold for powder metallurgy products includes an intermediate mold body 1. The intermediate mold body 1 has a forming mold cavity 3 in the middle that matches the shape of the formed product 2. A powder-adding groove 4 is provided at the irregular part of the forming mold cavity 3 for adding powder to the formed product 2 at this location.

[0015] The powder-enhancing groove 4 is formed by sinking to a certain depth along the edge of the forming mold cavity 3.

[0016] The powder-enhancing groove 4 settles along the outer edge of the forming mold cavity 3.

[0017] The powder-enhancing groove 4 is located at the corner of the forming mold cavity 3.

[0018] The settling depth of the powder-enhancing tank 4 is 6 mm.

[0019] During debugging, after powder filling, the middle mold body 1 needs to rise and vibrate again (a standard function of the mold equipment, simply turn it on) to allow the powder from the powder-adding groove 4 to fall into the forming mold cavity 3, and then press and form. Positions that were originally low become higher due to the increased powder volume, such as... Figure 3 As shown in the figure, the original height of the shaded area at point A was always low. After using the improved intermediate mold with the utility model, the height can be guaranteed to the middle limit. In addition, the increased powder content at the corners increases the density and strength, unexpectedly avoiding the problem of missing corners and chips at the edges and irregular extensions of the molded product 2. Figure 3 For example, when the original 10.6 dimension in the diagram was adjusted to 10.55, the 7.45 dimension could maintain the middle limit. After adding the powder-adding tank 4, 10.6 can be maintained as the middle limit, while 7.45 remains unchanged. At this point, both dimensions can be kept at the middle limit simultaneously. Feedback from actual production shows that after adopting this improved middle mold, operation is convenient, machine setup time is saved, production is stable during the process, production efficiency is significantly improved, and production quality is enhanced.

[0020] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A height-compensating intermediate mold for powder metallurgy products, characterized in that, The product includes a middle mold body (1), and a forming mold cavity (3) matching the shape of the formed product (2) is provided in the middle of the middle mold body (1). A powder-adding groove (4) is provided at the irregular part of the forming mold cavity (3) for adding powder to the formed product (2) at this location.

2. The height-compensating intermediate mold for powder metallurgy products according to claim 1, characterized in that, The powder-enhancing groove (4) is formed by sinking to a certain depth along the edge of the forming mold cavity (3).

3. The height-compensating intermediate mold for powder metallurgy products according to claim 2, characterized in that, The powder-enhancing groove (4) is formed by settling along the outer edge of the forming mold cavity (3).

4. The height-compensating intermediate mold for powder metallurgy products according to claim 3, characterized in that, The powder-enhancing groove (4) is located at the corner of the forming mold cavity (3).

5. The height-compensating intermediate mold for powder metallurgy products according to claim 4, characterized in that, The settling depth of the powder-enhancing tank (4) is 6 mm.

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