Shaping die for powder metallurgy product

Abstract

The utility model discloses a shaping die for a powder metallurgy product, relates to the technical field of powder metallurgy, and aims to solve the technical problem of inconvenience in subsequent demolding operation caused by direct die-casting shaping at present. The shaping die comprises an upper die mechanism, a lower die cylinder, a bottom plate and a forming material, a middle column is fixed in the middle of the upper end face of the bottom plate; the lower die cylinder is installed on the bottom plate, the upper die mechanism is installed at an opening in the upper end of the lower die cylinder, the stamping mechanism is arranged on the lower side of the upper die mechanism and located in the lower die cylinder, the inner side of the lower die cylinder is sleeved with the inner die sleeve, and cutting grooves are formed in the inner side of the inner die sleeve in an annular array mode. The forming material is located on the inner side of the inner die sleeve of the lower die cylinder. The die has the advantages that the edge cutting type structural design is adopted, tooth edge forming is facilitated, and demolding is facilitated through the combined structure.

Description

Technical Field

[0001] This utility model relates to the field of powder metallurgy technology, and more specifically, to a shaping mold for powder metallurgy products. Background Technology

[0002] Powder metallurgy is a process technology that uses forming and sintering processes to create materials and products from metal powders or mixtures of metal and non-metal powders. It is suitable for producing porous self-lubricating bearings in refrigerator compressors, washing machines, and electric fans, as well as complex-shaped gears and magnets in household air conditioner exhaust fans and vacuum cleaners.

[0003] During production, powdered materials need to be pressed into shape. Existing forming equipment, when shaping toothed shafts, results in a high degree of fit between the pressed tooth edges and the mold. Since the finished product is not sintered, it is relatively fragile, and direct demolding can easily damage the tooth edges, affecting the quality of the finished product. Therefore, we propose a forming mold for powder metallurgy products. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a shaping mold for powder metallurgy products to solve the technical problem that direct die casting shaping causes inconvenience in subsequent demolding operations.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a forming mold for powder metallurgy products, comprising an upper mold mechanism, a lower mold cylinder, a base plate, and a forming material. A central column is fixed at the middle of the upper end face of the base plate. The lower mold cylinder is installed on the base plate. The upper mold mechanism is installed at the upper opening of the lower mold cylinder. A stamping mechanism is provided on the lower side of the upper mold mechanism and is located inside the lower mold cylinder. An inner mold sleeve is sleeved on the inner side of the lower mold cylinder. Cutting grooves are arranged in a ring array on the inner side of the inner mold sleeve. The forming material is located inside the inner mold sleeve of the lower mold cylinder.

[0006] In use, this invention involves filling the inner mold sleeve of the lower mold cylinder with metal powder, the powder height being lower than the height of the central column. Then, the upper mold mechanism and lower mold cylinder are closed. During the mold closing process, the lower cutting blade is inserted into the powder, simultaneously cutting and separating the outer powder into the cutting groove of the inner mold sleeve. When mold closing is complete, the extrusion column presses the powder in the cutting groove to compact it. An external stamping device impacts the top of the stamping column, causing the stamping column to drive the stamping die downwards to extrude the powder. Through the above operations, the metal powder is shaped and pressed into a bushing structure with an external toothed structure. The cutting blade, in conjunction with the cutting groove, cuts and retains the powder within the outer toothed structure, facilitating the die-casting of the toothed structure. Simultaneously, ensure that the toothed groove structure does not stick to the mold and cause damage during demolding. After processing, separate the upper mold mechanism. At this time, the cutting piece is pulled out, and the cut scrap is pressed and left inside the cutting groove. Then, manually remove the lower mold cylinder and the base plate, flip the lower mold cylinder and clamp it onto the storage container. Then, pull out the central column connected to the base plate upwards, so that the central column separates from the inner hole of the molding material. Then, lift the lower mold cylinder upwards, so that the molding material separates from the inner mold sleeve and stays on the container. Finally, hold the outer side of the inner mold sleeve and lift it upwards to separate it, thus completing the final demolding. Manually clean the scrap inside the cutting groove of the inner mold sleeve. Through the convenient combination structure design, demolding is convenient and avoids damage to the overall finished product caused by adhesion, ensuring production quality.

[0007] Preferably, a lower pressure sleeve is embedded in the middle of the bottom end of the lower mold cylinder, and the central column passes through the interior of the lower pressure sleeve and is located inside the lower mold cylinder.

[0008] Preferably, the upper mold mechanism consists of an upper cover and cutting pieces. The upper cover has a central hole in the middle, and springs are fixed in the recesses on the lower end face of the upper cover. Cutting pieces are fixed in a ring array on the outer side of the lower end face of the upper cover, and extrusion columns are fixed at the top of the cutting pieces.

[0009] Preferably, the stamping mechanism consists of a stamping die and a stamping column. The outer side of the stamping die is provided with a side groove in an annular array. The side groove is adapted to the cutting piece. An upper pressure sleeve is fixed at the middle of the lower end face of the stamping die, and a column opening is provided at the lower end of the upper pressure sleeve.

[0010] Preferably, the stamping column passes through the central hole, and the lower end of the spring is fixed to the upper side of the stamping die.

[0011] Preferably, the molding material has an inner hole in the middle, and the upper and lower openings of the inner hole are provided with fitting grooves, and the outer side of the molding material has grooves arranged in a ring array.

[0012] Preferably, the inner hole is connected to the central column, and the upper end of the central column is connected to the column opening, the lower pressure sleeve and the upper pressure sleeve are connected to the adapter groove, and the cut piece is connected to the groove.

[0013] Preferably, the cutting piece has an arc structure design, and the cutting piece and the cutting groove form a cylindrical cavity, and the extrusion column is adapted to the cylindrical cavity.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model designs a cutting blade to fill metal powder into the inner mold sleeve of the lower mold cylinder. The height of the powder is lower than the height of the central column. Then, the upper mold mechanism and the lower mold cylinder are closed. During the mold closing process, the cutting blade on the lower side is inserted into the powder. At the same time, the cutting blade cuts the powder on the outside and separates it into the cutting groove of the inner mold sleeve. When the mold closing is completed, the extrusion column squeezes the powder in the cutting groove to compress it. The top of the stamping column is impacted by the external stamping device, causing the stamping column to drive the stamping die to descend and squeeze the powder. Through the above operation, the metal powder is shaped and pressed into a bushing structure with a toothed structure on the outside. The cutting blade and the cutting groove cooperate to cut and retain the powder in the toothed structure on the outside, which facilitates the die casting of the toothed structure. At the same time, it ensures that the toothed structure sticks to the mold and causes damage during the demolding process.

[0016] 2. This utility model also incorporates an inner mold sleeve design. After processing, the upper mold mechanism is separated, and the cut piece is removed. The cut scrap is then pressed and left inside the cutting groove. The lower mold cylinder and base plate are then manually removed, and the lower mold cylinder is flipped and clamped onto the storage container. The central column connected to the base plate is then pulled upwards, separating it from the inner hole of the molding material. The lower mold cylinder is then lifted upwards, allowing the molding material to detach from the inner mold sleeve and remain on the container. Finally, the outer side of the inner mold sleeve is lifted upwards to separate it, completing the final demolding. The scrap inside the cutting groove of the inner mold sleeve can then be manually cleaned. This convenient modular design facilitates demolding, avoids damage to the molding material of the finished product caused by adhesion, and ensures production quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the unfolded structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the lower mold cylinder structure of this utility model;

[0020] Figure 4 This is a cross-sectional view of the lower mold cylinder of this utility model;

[0021] Figure 5 This is a schematic diagram of the molding material structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the upper mold mechanism of this utility model;

[0023] Figure 7 This is a schematic diagram of the stamping mechanism of this utility model.

[0024] The following are the labels in the diagram: 1. Upper mold mechanism; 101. Upper cover; 102. Extrusion column; 103. Cutting piece; 104. Spring; 105. Central hole; 2. Lower mold cylinder; 201. Lower pressure sleeve; 3. Base plate; 4. Stamping mechanism; 401. Stamping die; 402. Upper pressure sleeve; 403. Side groove; 404. Column opening; 405. Stamping column; 5. Molding material; 501. Groove; 502. Adaptor groove; 503. Inner hole; 6. Inner mold sleeve; 7. Central column; 8. Cutting groove. Detailed Implementation

[0025] like Figures 1 to 4 As shown, this utility model relates to a forming mold for powder metallurgy products, including an upper mold mechanism 1, a lower mold cylinder 2, a base plate 3, and a forming material 5. A central column 7 is fixed at the middle of the upper end face of the base plate 3. The lower mold cylinder 2 is installed on the base plate 3. A lower pressure sleeve 201 is embedded in the middle of the bottom end of the lower mold cylinder 2. The central column 7 passes through the interior of the lower pressure sleeve 201 and is located inside the lower mold cylinder 2. The central column 7 is detachably inserted into the lower mold cylinder 2. The upper mold mechanism 1 is installed at the upper opening of the lower mold cylinder 2. The upper mold mechanism 1 consists of an upper cover 101 and a cutting piece 103. A central hole 105 is opened in the middle of the upper cover 101. Springs 104 are fixed in the recesses of the lower end face of the upper cover 101. Cutting pieces 103 are fixed in a ring array on the outer side of the lower end face of the upper cover 101, and an extrusion column 102 is fixed at the top of the inner end of the cutting piece 103.

[0026] like Figures 3 to 7As shown, this utility model relates to a forming mold for powder metallurgy products, including an upper mold mechanism 1, a lower mold cylinder 2, a base plate 3, and a forming material 5. The upper mold mechanism 1 is installed at the upper opening of the lower mold cylinder 2. A stamping mechanism 4 is provided on the lower side of the upper mold mechanism 1 and is located inside the lower mold cylinder 2. The stamping mechanism 4 consists of a stamping die 401 and a stamping column 405. The stamping column 405 passes through the central hole 105. The lower end of a spring 104 is fixed to the upper side of the stamping die 401. An external stamping device strikes the protruding part of the stamping column 405, causing the stamping die 401 to descend. The spring 104 rebounds, causing the stamping die 401 to return to its original position. Side grooves 403 are formed in a circular array on the outer side of the stamping die 401. The side grooves 403 are adapted to the cutting piece 103. An upper pressure sleeve 402 is fixed at the middle of the lower end face of the stamping die 401. The lower end of the pressure sleeve 402 has a column opening 404. The inner mold sleeve 6 is sleeved inside the lower mold cylinder 2. The inner side of the inner mold sleeve 6 has a ring array of cutting grooves 8. The molding material 5 is located inside the inner mold sleeve 6 of the lower mold cylinder 2. The middle of the molding material 5 has an inner hole 503, and the upper and lower openings of the inner hole 503 have matching grooves 502. The outer side of the molding material 5 has a ring array of grooves 501. The inner hole 503 is connected to the central column 7, and the upper end of the central column 7 is connected to the column opening 404. The lower pressure sleeve 201 and the upper pressure sleeve 402 are connected to the matching grooves 502. The cutting piece 103 is connected to the grooves 501. The cutting piece 103 has an arc structure design, and the cutting piece 103 and the cutting groove 8 form a cylindrical cavity. The extrusion column 102 is adapted to the cylindrical cavity. The extrusion column 102 is used to compress the powder material cut in the cylindrical cavity.

[0027] Working Principle: This embodiment provides a shaping mold for powder metallurgy products. In use, metal powder is filled into the inner mold sleeve 6 of the lower mold cylinder 2, with the powder height lower than the height of the central column 7. Then, the upper mold mechanism 1 and the lower mold cylinder 2 are closed. During the mold closing process, the lower cutting piece 103 is inserted into the powder, simultaneously cutting and separating the outer powder into the cutting groove 8 of the inner mold sleeve 6. When the mold closing is complete, the extrusion column 102 presses the powder in the cutting groove 8 to compress it. An external stamping device impacts the top of the stamping column 405, causing the stamping column 405 to drive the stamping die 401 down to extrude the powder. Through the above operations, the metal powder is shaped and pressed into a toothed shape. The bushing structure with a toothed shape uses a cutting blade 103 and a cutting groove 8 to cut and retain the powder material inside the toothed structure on the outside. After processing, the upper mold mechanism 1 is separated. At this time, the cutting blade 103 is pulled out, and the cut scraps are pressed and left inside the cutting groove 8. Then, the lower mold cylinder 2 and the base plate 3 are manually removed. The lower mold cylinder 2 is flipped and clamped onto the storage container. Then, the central column 7 connected to the base plate 3 is pulled out upward, so that the central column 7 is separated from the inner hole 503 of the molding material 5. Then, the lower mold cylinder 2 is lifted upward, so that the molding material 5 is separated from the inner mold sleeve 6 and left on the container. Finally, the outer side of the inner mold sleeve 6 is held and lifted upward to separate it, thus completing the final demolding. The scraps inside the cutting groove 8 of the inner mold sleeve 6 can be cleaned manually.

[0028] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A sizing die for powder metallurgy articles comprising an upper die mechanism (1), a lower die cylinder (2), a base plate (3) and a shaped charge (5), characterized in that: A central column (7) is fixed at the middle of the upper end face of the base plate (3). The lower mold cylinder (2) is installed on the base plate (3). The upper mold mechanism (1) is installed at the upper opening of the lower mold cylinder (2). A stamping mechanism (4) is provided on the lower side of the upper mold mechanism (1), and the stamping mechanism (4) is located inside the lower mold cylinder (2). An inner mold sleeve (6) is sleeved on the inner side of the lower mold cylinder (2). A cutting groove (8) is opened in a ring array on the inner side of the inner mold sleeve (6). The molding material (5) is located inside the inner mold sleeve (6) of the lower mold cylinder (2).

2. A sizing die for powder metallurgy articles as defined in claim 1, characterized in that: A lower pressure sleeve (201) is embedded in the middle of the bottom of the lower mold cylinder (2), and the central column (7) passes through the interior of the lower pressure sleeve (201) and is located inside the lower mold cylinder (2).

3. A sizing die for powder metallurgy articles as defined in claim 1, wherein: The upper mold mechanism (1) consists of an upper cover (101) and a cutting piece (103). The upper cover (101) has a central hole (105) in the middle. Springs (104) are fixed in the recesses on the lower end face of the upper cover (101). Cutting pieces (103) are fixed in a ring array on the outer side of the lower end face of the upper cover (101), and a pressing column (102) is fixed at the top inside the cutting piece (103).

4. A sizing die for powder metallurgy articles as defined in claim 3, wherein: The stamping mechanism (4) consists of a stamping die (401) and a stamping column (405). The outer side of the stamping die (401) is provided with a side groove (403) in an annular array. The side groove (403) is adapted to the cutting piece (103). An upper pressure sleeve (402) is fixed at the middle of the lower end face of the stamping die (401), and a column opening (404) is provided at the lower end of the upper pressure sleeve (402).

5. A sizing die for powder metallurgy articles as defined in claim 4, wherein: The stamping column (405) passes through the central hole (105), and the lower end of the spring (104) is fixed to the upper side of the stamping die (401).

6. A sizing die for powder metallurgy articles as defined in claim 5, wherein: The molding material (5) has an inner hole (503) in the middle, and the upper and lower openings of the inner hole (503) are provided with fitting grooves (502). The outer side of the molding material (5) has grooves (501) arranged in an annular array.

7. A sizing die for powder metallurgy articles as defined in claim 6, wherein: The inner hole (503) is connected to the central column (7), and the upper end of the central column (7) is connected to the column opening (404). The lower pressure sleeve (201) and the upper pressure sleeve (402) are connected to the adapter groove (502), and the cut piece (103) is connected to the groove (501).

8. A sizing die for powder metallurgy articles as defined in claim 7, wherein: The cutting piece (103) has an arc structure design, and the cutting piece (103) and the cutting groove (8) form a cylindrical cavity. The extrusion column (102) is adapted to the cylindrical cavity.

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