Sintering mold for preventing product deformation

Abstract

The utility model discloses a sintering mould for preventing product deformation, which comprises a female mould, an upper mould and a lower mould, the female mould is provided with a mould cavity part, the upper mould and the lower mould are respectively provided with an upper column body and a lower column body, the upper column body and the lower column body are respectively and movably inserted into the mould cavity part from two ends of the female mould, and the upper column body and the lower column body are arranged in the mould cavity part. The upper mold and the lower mold are close to each other to extrude the powdery material in the mold cavity part to form a part, protruding strips are symmetrically arranged on the end face, close to the lower mold, of an upper column body of the upper mold, and a groove is formed in the corresponding position of the end face of the part. Due to the fact that the protruding strips are symmetrically arranged on the end face, close to the lower mold body, of the upper column body of the upper mold body, grooves are formed in the corresponding positions of the end face of a formed part. Therefore, after a product provided with the groove is pressed on the adhesion-isolating sand, the adhesion-isolating sand is influenced by gravity, and the uneven adhesion-isolating sand flows towards the gap position, so that the adhesion-isolating sand is naturally corrected and leveled up, and the problems of sinking and deformation of parts during sintering are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of sintering molds, in particular to a sintering mold for preventing product deformation. Background Art

[0002] Sintering dies are tools used in powder metallurgy processes, primarily for manufacturing metal parts or products. In this process, the product is first formed into a mold and then sintered at high temperatures to create a metal product with a certain strength and density between the powder particles.

[0003] The sintering mold usually includes a mother mold, an upper mold and a lower mold. The upper mold and the lower mold are inserted into the mother mold to form a molding cavity for accommodating powder materials. The powder in the molding cavity is then compacted by the extrusion of the upper mold and the lower mold. After compaction, the sintering step begins. During sintering, the green body is placed on a sintering carrier plate. In order to prevent the product from sticking to the sintering carrier plate at high temperature, a barrier sand is generally provided between the green body and the sintering carrier plate.

[0004] A product a in the prior art, such as Figure 10 As shown, one end of product a is set as a plane. During sintering, the product a is placed on a sintering carrier plate with the plane end facing downward, and isolation sand is provided between the plane of product a and the sintering carrier plate. When the product a is placed on the sintering carrier plate, the isolation sand is prone to uneven distribution or partial accumulation, which will cause the product a to bulge and deform in the middle or edge position after sintering shrinkage. Therefore, a sintering mold is needed to improve product a. Utility Model Content

[0005] The present invention aims to solve the problems in the prior art and proposes the following technical solutions:

[0006] The utility model provides a sintering mold for preventing product deformation, comprising:

[0007] A mother mold, an upper mold and a lower mold, wherein the mother mold is provided with a cavity portion, and the upper mold and the lower mold are respectively provided with an upper cylinder and a lower cylinder, which are movably inserted into the cavity portion from both ends of the mother mold, and the upper mold and the lower mold are brought close to each other to extrude the powdered material in the cavity portion to form a part;

[0008] The upper column of the upper mold is symmetrically provided with raised strips on the end surface close to the lower mold, and a groove is formed at the corresponding position of the end surface of the part.

[0009] As a preferred embodiment of the above technical solution, the cavity portion of the female mold includes cavity one and cavity two, wherein cavity one is located in the middle portion and cavity two is symmetrically arranged on both sides of cavity one.

[0010] As a preferred embodiment of the above technical solution, the lower column of the lower mold includes a middle column and side columns, and the side columns are symmetrically arranged on both sides of the middle column. The middle column and side columns of the lower mold are movably inserted into cavity 1 and cavity 2 of the mother mold respectively.

[0011] As a preferred embodiment of the above technical solution, the center column and side columns of the lower mold match the positions and shapes of the first and second cavities of the mother mold respectively.

[0012] The beneficial effects of the utility model are:

[0013] The utility model forms grooves at corresponding positions on the end surfaces of the formed parts by symmetrically arranging raised strips on the end surfaces of the upper cylinder of the upper mold close to the lower mold; thereby, when the product with the grooves is pressed down onto the isolation sand, the isolation sand is affected by gravity, and the uneven isolation sand will flow into the gap position, thereby naturally correcting and leveling the parts, thereby avoiding the problem of concavity and deformation of the parts during sintering. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the mother mold in the sintering mold in the embodiment (top view);

[0015] Figure 2 The figure shows a schematic cross-sectional structure diagram of a mother mold in a sintering mold in an embodiment;

[0016] Figure 3 The figure shows a schematic front view of the upper mold in the sintering mold in the embodiment;

[0017] Figure 4 The figure shows a bottom view of the upper mold in the sintering mold in the embodiment;

[0018] Figure 5 The figure shows the main cross-sectional structure diagram of the lower mold of the sintering mold in the embodiment;

[0019] Figure 6 The figure shows a top view of the lower mold of the sintering mold in the embodiment;

[0020] Figure 7 Shown is a schematic diagram of the sintering mold used in conjunction with the embodiment;

[0021] Figure 8 Shown is a schematic diagram of the product in the embodiment;

[0022] Figure 9 Shown is a schematic diagram of the cooperation between the product and the sintering carrier plate in the embodiment;

[0023] Figure 10 Shown is a schematic diagram of product a in the background art;

[0024] Figure numerals: 1, part; 2, groove; 3, sintering carrier plate; 10, mother mold; 11, cavity one; 12, cavity two; 20, upper mold; 21, raised strip; 30, lower mold; 31, middle column; 32, side column. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0026] Example

[0027] like Figure 7 、 Figure 8 As shown, Figure 7 The diagram shows the sintering mold used in the embodiment. Figure 8 Shown is a schematic diagram of the product in the embodiment;

[0028] The device includes:

[0029] The mother mold 10, the upper mold 20 and the lower mold 30 are provided with a cavity portion on the mother mold 10, and the upper mold 20 and the lower mold 30 are provided with an upper cylinder and a lower cylinder respectively. The upper cylinder and the lower cylinder are movably inserted into the cavity portion from both ends of the mother mold 10. The upper mold 20 and the lower mold 30 are close to each other to squeeze the powdered material in the cavity portion to form the part 1;

[0030] like Figure 3 、 Figure 4 As shown, Figure 3 The figure shows a schematic front view of the upper mold in the sintering mold in the embodiment; Figure 4 The figure shows a bottom view of the upper mold in the sintering mold in the embodiment;

[0031] A raised strip 21 is symmetrically provided on the end surface of the upper column of the upper mold 20 close to the lower mold 30, and a groove 2 is formed at the corresponding position of the end surface of the part 1.

[0032] By providing a raised strip 21 on the end surface of the upper cylinder of the upper mold 20, a groove 2 is formed at a corresponding position on the end surface of the formed part 1;

[0033] like Figure 9 As shown, Figure 9 The figure shows the cooperation diagram of the product and the sintering carrier plate in the embodiment; during the sintering process, the end of the part 1 provided with the groove 2 is placed close to the sintering carrier plate 3.

[0034] The part 1 passes through the provided groove 2, and the isolation sand particles on the sintering carrier plate 3 flow to the gap position after being squeezed by gravity. That is, after the product with the groove 2 is pressed down onto the isolation sand, the isolation sand is affected by gravity, and the uneven isolation sand will flow to the gap position, thereby naturally correcting and leveling. In this way, the part 1 will not cause concave and deformation problems during sintering.

[0035] Specifically, the powdery material is manganese-zinc ferrite magnetic powder.

[0036] Figure 1 、 Figure 2 As shown, Figure 1 Schematic diagram of the mother mold in the sintering mold in the embodiment (top view); Figure 2 The figure shows a schematic cross-sectional structure diagram of a mother mold in a sintering mold in an embodiment;

[0037] The cavity portion of the female mold 10 includes a cavity 11 and a cavity 12 . The cavity 11 is located in the middle portion, and the cavity 2 12 is symmetrically arranged on both sides of the cavity 11 .

[0038] like Figure 5 、 Figure 6 As shown, Figure 5 The figure shows the main cross-sectional structure diagram of the lower mold of the sintering mold in the embodiment; Figure 6 The figure shows a top view of the lower mold of the sintering mold in the embodiment;

[0039] The lower column of the lower mold 30 includes a center column 31 and side columns 32, and the side columns 32 are symmetrically arranged on both sides of the center column 31;

[0040] The center column 31 and side columns 32 of the lower mold 30 match the positions and shapes of the cavity 11 and cavity 2 12 of the female mold 10 respectively, and the center column 31 and side columns 32 of the lower mold 30 are movably inserted into the cavity 11 and cavity 2 12 of the female mold 10.

[0041] Working principle: This device forms a groove 2 at the corresponding position of the end surface of the part 1 formed by arranging a raised strip 21 on the end surface of the upper cylinder of the upper mold 20. When the part 1 is matched with the sintering carrier plate 3, the isolation sand particles on the sintering carrier plate 3 flow toward the gap position after being squeezed by gravity, that is, the uneven isolation sand will flow to the gap position, thereby achieving natural correction and leveling, so that the part 1 will not cause concave and deformation problems during sintering.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. The sintering mold to prevent product deformation is characterized by: include: A mother mold (10), an upper mold (20) and a lower mold (30), wherein the mother mold (10) is provided with a cavity portion, and the upper mold (20) and the lower mold (30) are respectively provided with an upper column and a lower column, the upper column and the lower column are respectively movably inserted into the cavity portion from both ends of the mother mold (10), and the upper mold (20) and the lower mold (30) are brought close to each other to extrude the powdered material in the cavity portion to form a part (1); The upper column of the upper mold (20) is symmetrically provided with raised strips (21) on the end surface close to the lower mold (30), and a groove (2) is formed at a corresponding position on the end surface of the part (1).

2. The sintering mold for preventing product deformation according to claim 1, characterized in that: The mold cavity portion of the female mold (10) includes a mold cavity (11) and a mold cavity (12), wherein the mold cavity (11) is located in the middle portion, and the mold cavity (12) is symmetrically arranged on both sides of the mold cavity (11).

3. The sintering mold for preventing product deformation according to claim 2, characterized in that: The lower column of the lower mold (30) includes a middle column (31) and side columns (32), and the side columns (32) are symmetrically arranged on both sides of the middle column (31). The middle column (31) and the side columns (32) of the lower mold (30) are movably inserted into the mold cavity 1 (11) and the mold cavity 2 (12) of the female mold (10).

4. The sintering mold for preventing product deformation according to claim 3, characterized in that: The center column (31) and the side column (32) of the lower mold (30) are respectively matched with the position and shape of the mold cavity 1 (11) and the mold cavity 2 (12) of the female mold (10).

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