A porous forming die for cemented carbide powder

Abstract

The utility model relates to powder metallurgy forming technical field, and disclose a kind of hard alloy powder porous forming die, including die holder and lift setting upper die on die holder, lower die is fixedly installed on die holder, it further include dust hood setting on die holder, dust removal part for making negative pressure suction force in dust hood is equipped on die holder, slidingly set with crosspiece on die holder, dust hood is fixedly connected on crosspiece, dust suction port of dust hood is connected with scraper by elastic member, when crosspiece slides, dust hood will drive scraper to slide over the top surface of lower die;The utility model can completely remove the residual powder on the top surface of lower die by the cooperation of dust hood, scraper and spring, thereby effectively avoiding new and old powder cross-contamination, realizing the composite effect of double cleaning, and further can guarantee the consistency of different batches of powder ratio, help to improve the quality and performance of alloy product.

Description

Technical Field

[0001] This utility model relates to the field of powder metallurgy forming technology, specifically to a porous forming mold for cemented carbide powder. Background Technology

[0002] Due to its high hardness, good wear resistance, and excellent red hardness, cemented carbide is widely used in cutting tools, mining tools, molds, and wear-resistant parts. Powder metallurgy is typically used in the production of cemented carbide products.

[0003] Currently, cemented carbide powder is mostly formed by compression molding. First, the cemented carbide powder in the storage box is loaded into multiple cavities of the mold by the horizontal sliding of the feeding equipment. Then, the upper mold with punch is driven by the pressing equipment (pneumatic or hydraulic) to apply pressure to the alloy powder in the lower mold cavity, so that it is compacted into a blank with a certain shape and strength and ejected from the mold. Finally, it is sintered to produce a dense cemented carbide product.

[0004] However, in the traditional die stamping process, the upper die punch reciprocates within the lower die cavity. A necessary clearance exists between the punch and the cavity wall. During each stamping, some powder is squeezed through this clearance and overflows upwards, or is adhered to the punch surface, resulting in powder dispersion. The overflowing powder particles scatter and accumulate on the top surface of the lower die. In subsequent cycles, they are carried into the cavity by newly added powder, easily leading to cross-contamination between new and old powders from different batches. Given the variations in the powder ratio between batches of cemented carbide powder, this contamination disrupts the established powder ratio consistency, thereby affecting product quality and performance.

[0005] Therefore, existing technologies have shortcomings and need to be improved. Utility Model Content

[0006] This invention provides a porous molding die for cemented carbide powder. By combining a dust extraction hood and a scraper, the powder on the top surface of the lower die can be completely removed, achieving a double cleaning effect. This avoids cross-contamination between new and old powders, ensures the consistency of powder ratios in different batches, and helps improve the quality and performance of alloy products. It solves the problem mentioned in the background art that traditional molds easily carry out powder during stamping, causing cross-contamination between new and old powders, disrupting the predetermined ratio, and affecting product quality and performance.

[0007] This utility model provides the following technical solution:

[0008] A porous molding die for cemented carbide powder includes a die base and an upper die that is lifted and mounted on the die base. A lower die is fixedly mounted on the die base. The die base also includes a dust collection hood mounted on the die base. The die base is provided with a dust removal part for generating negative pressure suction inside the dust collection hood. A horizontal plate is slidably mounted on the die base. The dust collection hood is fixedly connected to the horizontal plate. A scraper is connected to the dust collection port of the dust collection hood through an elastic element. When the horizontal plate slides, the dust collection hood will drive the scraper to slide over the top surface of the lower die.

[0009] As a preferred technical solution of this utility model, the dust removal part includes a support plate fixedly connected to the mold base, a dust suction fan fixedly installed on the top of the support plate, the air inlet of the dust suction fan being fixedly connected to the dust suction hood through a telescopic hose, the exhaust end of the dust suction fan being fixedly connected to a dust discharge pipe, and a dust removal bag being fixedly fitted on the end of the dust discharge pipe away from the dust suction fan.

[0010] As a preferred technical solution of this utility model, a housing is fixedly connected to the mold base, a screw is rotatably connected inside the housing, a motor is fixedly installed on the outer wall of the housing, the output end of the motor extends into the housing and is fixedly connected to one end of the screw, a horizontal plate is slidably installed on the housing, and the horizontal plate is threadedly connected to the screw.

[0011] As a preferred technical solution of this utility model, a guide opening is provided through the shell, and the horizontal plate is slidably connected in the guide opening.

[0012] As a preferred technical solution of this utility model, the elastic element includes a support plate fixedly connected to both sides of the dust collection hood, a vertical rod slidably connected to the support plate, a limit block fixedly connected to the top of the vertical rod, a spring sleeved on the vertical rod, and the two ends of the spring being fixedly connected to the surfaces of the support plate and the limit block, respectively. The scraper is detachably connected to the bottom of the vertical rod.

[0013] As a preferred embodiment of this utility model, the scraper is provided with a mounting hole, a bolt is slidably inserted into the mounting hole, and a screw hole is provided at the bottom end of the vertical rod, with the bolt threaded into the screw hole.

[0014] Compared with the prior art, this utility model provides a porous molding die for cemented carbide powder, which has the following advantages:

[0015] 1. In this porous molding die for cemented carbide powder, by starting the motor and the dust extraction fan, the dust extraction hood can be driven to slide over the top surface of the lower die and remove the residual powder using negative pressure. This effectively prevents the old powder from being carried into the cavity of the lower die by the newly added powder, thus avoiding cross-contamination between the old and new powders.

[0016] 2. In this porous molding die for cemented carbide powder, the spring and scraper can scrape off the tightly adhered powder on the top surface of the lower die, and the strong suction of the dust hood can thoroughly remove the powder from the top surface of the lower die, achieving a double cleaning effect. This ensures the consistency of powder ratios between different batches and helps improve the quality and performance of alloy products.

[0017] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model solves the problem mentioned in the background art that traditional mold stamping easily carries out powder, causing cross-contamination of new and old powders, disrupting the established ratio, and affecting product quality and performance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a three-dimensional structural diagram of the dust collection cover of this utility model;

[0022] Figure 3 This is a three-dimensional structural diagram of the dust collector fan of this utility model;

[0023] Figure 4 This is a schematic diagram of the three-dimensional structure of the scraper of this utility model.

[0024] In the diagram: 1. Mold base; 2. Upper mold; 3. Lower mold; 4. Dust hood; 41. Support plate; 42. Dust suction fan; 43. Telescopic hose; 44. Dust exhaust pipe; 45. Dust collection bag; 5. Horizontal plate; 51. Housing; 52. Screw; 53. Motor; 54. Guide port; 6. Scraper; 7. Support plate; 8. Vertical rod; 9. Limiting block; 10. Spring; 11. Bolt; 12. Mounting hole. Detailed Implementation

[0025] To make the utility model's objectives, features, and advantages more apparent and understandable, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component centrally located at the same time.

[0027] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] Reference Figures 1-4 A porous molding die for hard alloy powder includes a mold base 1 and an upper mold 2 that is lifted and lowered on the mold base 1. A lower mold 3 is fixedly installed on the mold base 1. The upper mold 2 is connected to the mold base 1 by a cylinder or hydraulic cylinder. In use, it drives the upper mold 2 to lift and lower and press the alloy powder in the cavity of the lower mold 3 into shape. It also includes a dust suction hood 4 installed on the mold base 1. The dust suction port of the dust suction hood 4 is vertically downward. The mold base 1 is provided with a dust removal part for generating negative pressure suction inside the dust suction hood 4 to remove residual powder on the top surface of the lower mold 3. A horizontal plate 5 is slidably installed on the mold base 1. The dust suction hood 4 is fixedly connected to the horizontal plate 5. A silicone scraper 6 is connected to the dust suction port of the dust suction hood 4 through an elastic element. When the horizontal plate 5 slides, the dust suction hood 4 will drive the scraper 6 to slide over the top surface of the lower mold 3. It can work with the strong suction of the dust suction hood 4 to thoroughly remove the powder on the top surface of the lower mold 3, achieving a double cleaning effect, thereby ensuring the consistency of powder ratio in different batches.

[0029] Of course, in other embodiments, the dust removal unit includes a support plate 41 fixedly connected to the mold base 1. A dust extraction fan 42, model RB-81D-3 of Quanfeng Environmental Protection Technology, is fixedly installed on the top of the support plate 41. The air inlet of the dust extraction fan 42 is fixedly connected to the dust extraction hood 4 via a telescopic hose 43. The exhaust end of the dust extraction fan 42 is fixedly connected to a dust discharge pipe 44. A dust extraction bag 45 is fixedly fitted onto the end of the dust discharge pipe 44 away from the dust extraction fan 42 via an elastic band. A housing 51 is fixedly connected to the mold base 1. A screw 52 is rotatably connected inside the housing 51. A motor 53, model Parker NV series or Panasonic A6 series, is fixedly installed on the outer wall of the housing 51. The output end of the motor 53 extends into the housing 51 and is fixedly connected to one end of the screw 52. The horizontal plate 5 slides. Installed on the housing 51, the horizontal plate 5 is threadedly connected to the screw 52. A guide port 54 is provided through the housing 51, and the horizontal plate 5 is slidably connected in the guide port 54. The elastic element includes a support plate 7 fixedly connected to both sides of the dust collection cover 4. A vertical rod 8 is slidably connected to the support plate 7. A limit block 9 is fixedly connected to the top of the vertical rod 8. A spring 10 is sleeved on the vertical rod 8. The two ends of the spring 10 are fixedly connected to the surfaces of the support plate 7 and the limit block 9, respectively. The scraper 6 is detachably connected to the bottom of the vertical rod 8. The scraper 6 has a mounting hole 12. A bolt 11 is slidably inserted into the mounting hole 12. A screw hole is provided at the bottom of the vertical rod 8. The bolt 11 is threaded into the screw hole. Through the setting of the bolt 11, the mounting hole 12 and the screw hole, the scraper 6 can be flexibly disassembled and assembled for replacement and maintenance.

[0030] Specifically, after the upper die 2 completes each stamping and resets upwards, and the formed alloy blank in the cavity of the lower die 3 is demolded, before the cyclic feeding, the motor 53 and the dust collector 42 are started. The dust collector 42 generates a continuous and strong suction force inside the dust collection hood 4. At the same time, the motor 53 drives the screw 52 to rotate and drives the horizontal plate 5 to slide along the guide port 54, thereby causing the dust collection hood 4 and the scraper 6 to slide along the top surface of the lower die 3. The strong suction force of the dust collection hood 4 can suck in the powder remaining on the top surface of the lower die 3, and discharge it into the dust collection bag 4 through the telescopic hose 43 and the dust discharge pipe 44. The centralized collection within the mold 5 effectively prevents old powder from being carried into the cavity of the lower mold 3 by newly added powder, thus avoiding cross-contamination between new and old powder. During the sliding cleaning process of the dust hood 4, the vertical rod 8, the limiting block 9, and the spring 10 allow the scraper 6 to press against the top surface of the lower mold 3, enabling the scraper 6 to scrape off the tightly adhered powder on the top surface of the lower mold 3. Combined with the strong suction of the dust hood 4, the powder on the top surface of the lower mold 3 is thoroughly removed, achieving a double cleaning effect. This ensures the consistency of powder ratios between different batches and helps improve the quality and performance of alloy products.

[0031] Components not described in detail in this article are existing technologies and will not be elaborated upon here.

[0032] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A porous molding die for cemented carbide powder, comprising a die base (1) and an upper die (2) ellipsably disposed on the die base (1), wherein a lower die (3) is fixedly mounted on the die base (1), characterized in that, It also includes a dust collection hood (4) disposed on the mold base (1), wherein the mold base (1) is provided with a dust removal part for generating negative pressure suction inside the dust collection hood (4). The mold base (1) is slidably provided with a horizontal plate (5), and the dust suction hood (4) is fixedly connected to the horizontal plate (5). The dust suction port of the dust suction hood (4) is connected to a scraper (6) through an elastic element. When the horizontal plate (5) slides, the dust suction hood (4) will drive the scraper (6) to slide over the top surface of the lower mold (3).

2. The porous molding die for cemented carbide powder according to claim 1, characterized in that, The dust removal unit includes a support plate (41) fixedly connected to the mold base (1). A dust suction fan (42) is fixedly installed on the top of the support plate (41). The air inlet of the dust suction fan (42) is fixedly connected to the dust suction hood (4) through a telescopic hose (43). The exhaust end of the dust suction fan (42) is fixedly connected to a dust discharge pipe (44). A dust removal bag (45) is fixedly fitted on the end of the dust discharge pipe (44) away from the dust suction fan (42).

3. The porous molding die for cemented carbide powder according to claim 1, characterized in that, A housing (51) is fixedly connected to the mold base (1). A screw (52) is rotatably connected inside the housing (51). A motor (53) is fixedly installed on the outer wall of the housing (51). The output end of the motor (53) extends into the housing (51) and is fixedly connected to one end of the screw (52). A horizontal plate (5) is slidably installed on the housing (51). The horizontal plate (5) is threadedly connected to the screw (52).

4. The porous molding die for cemented carbide powder according to claim 3, characterized in that, A guide opening (54) is provided through the housing (51), and the horizontal plate (5) is slidably connected to the guide opening (54).

5. The porous molding die for cemented carbide powder according to claim 1, characterized in that, The elastic element includes a support plate (7) fixedly connected to both sides of the dust cover (4), a vertical rod (8) is slidably connected to the support plate (7) longitudinally, a limit block (9) is fixedly connected to the top of the vertical rod (8), a spring (10) is sleeved on the vertical rod (8), and the two ends of the spring (10) are fixedly connected to the surfaces of the support plate (7) and the limit block (9) respectively. The scraper (6) is detachably connected to the bottom of the vertical rod (8).

6. The porous molding die for cemented carbide powder according to claim 5, characterized in that, The scraper (6) has an installation hole (12) and a bolt (11) is slidably inserted into the installation hole (12). The bottom end of the vertical rod (8) has a screw hole and the bolt (11) is threaded into the screw hole.

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