Powder metallurgy valve seat ring forming mould pressing device

Abstract

The utility model relates to the field of mold pressing devices, in particular to a mold pressing device for forming a powder metallurgy valve seat ring, and solves the technical problem that when an existing valve seat ring is subjected to mold pressing forming through a powder smelting technology, residual metal powder on the surface of a mold is inconvenient to quickly clean. According to the technical scheme, the mold pressing device for forming the powder metallurgy valve seat ring comprises a support of a door type structure, a supporting table, an air blower, an air cylinder, a mold pressing head, an air outlet unit, an air inlet, a mold assembly and a material guiding assembly, wherein the support is composed of vertical frames on the left side and the right side and a cross beam between the upper ends of the vertical frames; according to the mold pressing head, the structure of an original mold pressing head is improved, the mold pressing head is matched with an air blower arranged on mold pressing equipment, redundant metal powder remaining on the surface of a mold is automatically blown away during mold pressing, and compared with an original manual cleaning mode, cleaning is more efficient, and the cleaning effect is better.

Description

Technical Field

[0001] The utility model relates to the field of molding devices, in particular to a powder metallurgy valve seat ring molding molding device. Background Art

[0002] Powder metallurgy is a common metal material smelting process. It is formed and sintered through molds. Valve seat rings, as equipment components that seal valves and withstand high-speed impacts, can also be processed and prepared using powder metallurgy technology.

[0003] In current powder metallurgy processing, in order to ensure the integrity of the final valve seat ring, the amount of metal powder added is generally greater than the amount of powder required for normal valve seat ring molding. This results in some excess powder remaining on the upper surface of the mold after the mold cavity is filled. If not processed, this part of the excess powder will also be squeezed out during molding, causing damage to the upper surface of the mold. However, it is time-consuming to manually clean this part of the powder, and the powder is easily contaminated on the workers' hands, causing waste.

[0004] Therefore, in view of the fact that the excess metal powder remaining on the mold surface is inconvenient to clean quickly when the existing valve seat ring is molded by powder smelting technology, a molding device can be designed that can automatically blow and clean the residual metal powder on the mold surface during molding, thereby eliminating manual cleaning and avoiding damage to the mold surface. Utility Model Content

[0005] In order to overcome the problem that when the existing valve seat ring is molded by powder smelting technology, the excess metal powder remaining on the mold surface is inconvenient to clean quickly.

[0006] The technical solution of the utility model is: a powder metallurgy valve seat ring forming molding device, including a bracket of a door-type structure composed of left and right side uprights and a cross beam between the upper ends of the uprights, a support platform, a blower, a cylinder, a molding head, an air outlet unit, an air inlet, a mold assembly, and a material guide assembly; a support platform with a suspended bottom is fixedly installed between the lower ends of the uprights on both sides of the bracket, a blower is installed at the lower end of the support platform, a cylinder is installed at the upper end of the cross beam, a molding head with an inverted truncated cone structure is fixedly installed at the lower end of the piston rod of the cylinder, an air inlet is provided on the molding head and the air inlet is connected to the air outlet channel of the blower, a hollow air outlet unit is provided on the inner side of the molding head, a mold assembly is placed on the support platform, and a material guide assembly is provided between the uprights and is sleeved on the outer side of the mold assembly and can slide up and down.

[0007] Preferably, after the metal powder is placed in the mold assembly, the cylinder controls the downward pressure of the molding head, while the air outlet unit on the molding head cooperates with the air flow input by the blower to blow the excess metal powder remaining on the upper surface of the mold assembly to the surrounding areas. The molding head enters the mold assembly, which has a shielding effect on the metal powder required for the valve gasket molding process, and will not cause the metal powder in the mold to scatter. The excess powder is collected at a specific position on the support with the help of the material guide assembly.

[0008] Preferably, the air outlet unit includes an air cavity, an inclined groove, and air holes; an air cavity is arranged on the inner side of the molding head, an inclined groove with a V-shaped cross-section is opened around the outer wall of the molding head, and a plurality of air holes are opened on the inner wall of the inclined groove, which are obliquely facing the upper surface of the mold assembly at an angle of 45 degrees. The blower conveys the air flow into the air cavity through the air inlet through the hose, and blows the air obliquely downward to the mold assembly through the air holes to blow off the excess metal powder.

[0009] Preferably, the mold assembly includes a mold base, a mold plane, an insert, and a mold cavity; the mold base is arranged above the support platform, a mold plane is arranged at the outer edge of the upper end of the mold base, a frustum-shaped insert adapted to the die pressing head is arranged in the mold base, a mold cavity for holding metal powder is opened on the bottom plane of the insert, the die pressing head is driven downward by a cylinder to enter the insert, and the lower plane of the die pressing head acts on the mold cavity to press the metal powder into shape. During the entire pressing process, the inclined slot is above the mold plane, and the blowing range of the air hole is always on the mold plane.

[0010] Preferably, a cross-shaped protrusion is welded and fixed in the center of the upper end of the support, and a cross-shaped groove matching the cross-shaped protrusion is opened at the lower end of the mold base. The cross-shaped protrusion is snapped into the cross-shaped groove to fix the mold base on the support. The mold base is horizontally locked with the support through the longitudinal insertion of the cross-shaped protrusion and the cross-shaped groove to prevent the mold base from sliding on the support during the molding process.

[0011] Preferably, the material guide assembly includes an outer guide ring, an inner guide ring, and a connecting frame; the outer guide ring and the inner guide ring are both mounted on the outside of the mold assembly, and the inner guide ring is arranged on the inside of the outer guide ring. The outer guide ring and the inner guide ring are connected and fixed by the connecting frame. The outer guide ring and the inner guide ring form a V-shaped cross-section structure with an open bottom. The metal powder blown off from the mold assembly floats around and falls on the inner wall of the outer guide ring, slides along the outer guide ring and falls onto the support. The setting of the inner guide ring prevents the metal powder from floating on the side wall of the mold base during the sliding process.

[0012] Preferably, the material guide assembly also includes a slider; the left and right ends of the outer guide ring are fixedly connected to the slider through a cross bar, a sliding groove is longitudinally opened in the middle of the vertical frame, the slider is slidably connected in the sliding groove, and the outer guide ring slides longitudinally along the sliding groove through the slider, and a limiting platform is provided in the sliding groove to prevent the slider from moving further downward, so that the outer guide ring can fully dock with the receiving ring groove when it falls to the lowest point.

[0013] Preferably, a receiving ring groove composed of two groups of concentric ring pieces is fixedly connected to the upper end of the support platform, and a plurality of discharge ports which penetrate longitudinally and are located at the lower side of the receiving ring groove are opened on the support platform. Magnetic blocking pieces corresponding to each discharge port are fixed on the bottom wall of the support platform by magnetic adsorption. The metal powder which slides down from the material guide assembly enters the receiving ring groove. The magnetic blocking pieces are removed one by one from the bottom of the support platform, and the metal powder can be taken out and recovered through each discharge port.

[0014] Beneficial effects of the utility model:

[0015] 1. By improving the structure of the original die pressing head and cooperating with the blower installed on the die pressing equipment, the excess metal powder remaining on the die surface can be automatically blown away during the die pressing process. Compared with the original manual cleaning method, the cleaning is more efficient and has a better cleaning effect.

[0016] 2. Through the material guide component set outside the mold assembly, the metal powder blown off the mold assembly can be collected to a specific location, which is convenient for unified recycling and avoids material waste;

[0017] 3. The material guide assembly adjusts its position by sliding along the vertical frame, which makes it convenient to expose the top of the support and provide enough space for the mold assembly to be placed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The first three-dimensional structure schematic diagram of the powder metallurgy valve seat ring molding molding device of the utility model is shown;

[0019] Figure 2 The schematic diagram of the cross-sectional structure of the powder metallurgy valve seat ring molding and pressing device of the utility model is shown;

[0020] Figure 3 The figure shows the internal three-dimensional structure of the molding head of the powder metallurgy valve seat ring molding molding device of the utility model;

[0021] Figure 4 The three-dimensional structure schematic diagram of the mold assembly of the powder metallurgy valve seat ring molding and pressing device of the utility model is shown;

[0022] Figure 5 The three-dimensional structure schematic diagram of the material guide assembly of the powder metallurgy valve seat ring molding molding device of the utility model is shown;

[0023] Figure 6 What is shown is a schematic diagram of the three-dimensional structure of the bottom structure of the support platform of the powder metallurgy valve seat ring molding and pressing device of the present utility model.

[0024] Explanation of the reference numerals in the accompanying drawings: 1. bracket; 2. support platform; 3. blower; 4. cylinder; 5. molding head; 7. air inlet; 10. receiving ring groove; 11. discharge port; 12. magnetic baffle; 601. air cavity; 602. inclined groove; 603. air hole; 801. mold base; 802. mold plane; 803. inlay; 804. mold cavity; 901. outer guide ring; 902. inner guide ring; 903. connecting frame; 904. slider. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0026] See also Figure 1-3 The utility model provides an embodiment: a powder metallurgy valve seat ring molding molding device, comprising a bracket 1 of a door-type structure composed of a left and right side frame and a crossbeam between the upper ends of the brackets, a support 2, a blower 3, a cylinder 4, a molding head 5, an air outlet unit, an air inlet 7, a mold assembly, and a material guide assembly; a support 2 with a suspended bottom is fixedly installed between the lower ends of the frames on both sides of the bracket 1, a blower 3 is installed at the lower end of the support 2, a cylinder 4 is installed at the upper end of the crossbeam, a molding head 5 of an inverted truncated cone structure is fixedly installed at the lower end of the piston rod of the cylinder 4, an air inlet 7 is arranged on the molding head 5, and the air inlet 7 is connected to the air outlet channel of the blower 3, A hollow air outlet unit is provided on the inner side of the molding head 5, a mold assembly is placed on the support platform 2, and a material guide assembly is provided between the vertical frames, which is sleeved on the outer side of the mold assembly and can slide up and down. After the metal powder is placed in the mold assembly, the cylinder 4 controls the molding head 5 to press down, while the air outlet unit on the molding head 5 cooperates with the air flow input by the blower 3 to blow the excess metal powder remaining on the upper surface of the mold assembly to the surrounding areas. The molding head 5 enters the mold assembly, which has a shielding effect on the metal powder required for the molding process of the valve gasket, and will not cause the metal powder in the mold to scatter. The excess powder is collected at a specific position on the support platform 2 with the help of the material guide assembly.

[0027] See also Figure 2-4In this embodiment, the air outlet unit includes an air cavity 601, an inclined groove 602, and an air hole 603; an air cavity 601 is arranged on the inner side of the die pressing head 5, and an inclined groove 602 with a V-shaped cross section is opened along the outer wall of the die pressing head 5. A plurality of air holes 603 are opened on the inner wall of the inclined groove 602, which are obliquely opposite to the upper surface of the mold assembly at an angle of 45 degrees. The blower 3 conveys the air flow into the air cavity 601 through the air inlet 7 through the hose, and blows the air flow obliquely downward to the mold assembly through the air hole 603 to blow off the excess metal powder. The mold assembly includes a mold base 801, a mold plane 802, an inlay 803, and a mold cavity 804; the mold base 801 is arranged above the support 2, and a mold plane 802 is arranged at the outer edge of the upper end of the mold base 801. A rounded table-shaped inlay adapted to the die pressing head 5 is arranged in the mold base 801. Mouth 803, a mold cavity 804 for containing metal powder is provided on the bottom plane of the inserting mouth 803, the ram 5 is driven downward by the cylinder 4 to press into the inserting mouth 803, the lower plane of the ram 5 acts on the mold cavity 804 to press the metal powder into shape, during the whole pressing process, the inclined groove 602 is above the mold plane 802, the blowing range of the air hole 603 is always on the mold plane 802, a cross-shaped protrusion is welded and fixed at the center of the upper end of the support 2, a cross-shaped groove matching with the cross-shaped protrusion is provided at the lower end of the mold base 801, the cross-shaped protrusion is snapped into the cross-shaped groove to fix the mold base 801 on the support 2, the mold base 801 is horizontally locked with the support 2 through the longitudinal insertion of the cross-shaped protrusion and the cross-shaped groove to prevent the mold base 801 from sliding on the support 2 during the molding process.

[0028] See also Figure 5-6In this embodiment, the material guide assembly includes an outer guide ring piece 901, an inner guide ring piece 902, and a connecting frame 903; the outer guide ring piece 901 and the inner guide ring piece 902 are both sleeved on the outside of the mold assembly, and the inner guide ring piece 902 is arranged on the inner side of the outer guide ring piece 901. The outer guide ring piece 901 and the inner guide ring piece 902 are connected and fixed by the connecting frame 903. The outer guide ring piece 901 and the inner guide ring piece 902 form a V-shaped cross-section structure with an open bottom. The metal powder blown off from the mold assembly floats around and falls on the inner side wall of the outer guide ring piece 901, slides along the outer guide ring piece 901 and falls on the support table 2. The inner guide ring piece 902 is arranged to prevent the metal powder from floating on the side wall of the mold base 801 during the sliding process. The material guide assembly also includes a slider 904; the left and right ends of the outer guide ring piece 901 are connected by a cross bar A slider 904 is fixedly connected, and a slide groove is longitudinally opened in the middle of the stand. The slider 904 is slidably connected to the slide groove, and the outer guide ring piece 901 slides longitudinally along the slide groove through the slider 904. A limit platform is set in the slide groove to prevent the slider 904 from moving further downward, so that the outer guide ring piece 901 can fully dock with the receiving ring groove 10 when it falls to the lowest point. The upper end of the support platform 2 is fixedly connected with a receiving ring groove 10 composed of two groups of concentric ring pieces. The support platform 2 is provided with a plurality of discharge ports 11 that penetrate longitudinally and are located at the lower side of the receiving ring groove 10. Magnetic attraction baffles 12 corresponding to each discharge port 11 are fixed on the bottom wall of the support platform 2 by magnetic attraction. The metal powder that slides down from the material guide assembly enters the receiving ring groove 10. The magnetic attraction baffles 12 are removed one by one from the bottom of the support platform 2, and the metal powder can be taken out and recovered through each discharge port 11.

[0029] When working, the user installs the die base 801 on the support 2 through the longitudinal insertion of the cross-shaped protrusion and the cross-shaped groove, and then puts the metal powder into the die cavity 804, and then starts the cylinder 4 and the blower 3, and the die pressing head 5 gradually presses down into the inlay 803;

[0030] In this process, the blower 3 delivers air flow through the air inlet 7 into the air cavity 601 through the hose, and blows it obliquely downward to the mold plane 802 through the air hole 603. The metal powder blown off from the mold assembly floats around and falls on the inner wall of the outer guide ring piece 901, slides along the outer guide ring piece 901 and falls into the receiving ring groove 10.

[0031] After the molding process is completed, the magnetic blocking sheets 12 are removed one by one from under the support table 2, and the metal powder is taken out and recovered through each discharge port 11.

[0032] Through the above steps, by improving the structure of the original molding head 5 and cooperating with the blower 3 set on the molding equipment, the excess metal powder remaining on the mold surface is automatically blown away during molding. Compared with the original manual cleaning method, the cleaning is more efficient and the cleaning effect is better, so as to solve the problem that the excess metal powder remaining on the mold surface is not convenient to clean quickly when the existing valve seat ring is molded by powder smelting technology.

[0033] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A powder metallurgy valve seat ring molding molding device, comprising a bracket (1) of a gate structure consisting of left and right side frames and a crossbeam between the upper ends of the frames; characterized in that: It also includes a support platform (2), a blower (3), a cylinder (4), a molding head (5), an air outlet unit, an air inlet (7), a mold assembly, and a material guide assembly; a support platform (2) with a suspended bottom is fixedly installed between the lower ends of the vertical frames on both sides of the bracket (1), a blower (3) is installed at the lower end of the support platform (2), a cylinder (4) is installed at the upper end of the crossbeam, a molding head (5) with an inverted truncated cone structure is fixedly installed at the lower end of the piston rod of the cylinder (4), an air inlet (7) is arranged on the molding head (5), and the air inlet (7) is connected to the air outlet channel of the blower (3), a hollow air outlet unit is arranged on the inner side of the molding head (5), a mold assembly is placed on the support platform (2), and a material guide assembly is arranged between the vertical frames and is sleeved on the outer side of the mold assembly and can slide up and down.

2. A powder metallurgy valve seat ring molding molding device according to claim 1, characterized in that: The air outlet unit comprises an air cavity (601), an inclined groove (602), and air holes (603); the air cavity (601) is arranged on the inner side of the molding head (5), an inclined groove (602) with a V-shaped cross section is opened around the outer wall of the molding head (5), and a plurality of air holes (603) are opened on the inner wall of the inclined groove (602) at an angle of 45 degrees to the upper surface of the mold assembly.

3. A powder metallurgy valve seat ring molding molding device according to claim 2, characterized in that: The mold assembly comprises a mold base (801), a mold plane (802), an insert (803), and a mold cavity (804); the mold base (801) is arranged above the support platform (2); a mold plane (802) is arranged at the outer edge of the upper end of the mold base (801); an inverted frustum-shaped insert (803) adapted to the die pressing head (5) is arranged in the mold base (801); and a mold cavity (804) for containing metal powder is opened on the bottom plane of the insert (803).

4. A powder metallurgy valve seat ring molding molding device according to claim 3, characterized in that: A cross-shaped protrusion is welded and fixed at the center of the upper end of the support platform (2), and a cross-shaped groove matching the cross-shaped protrusion is opened at the lower end of the mold base (801). The cross-shaped protrusion is snapped into the cross-shaped groove to fix the mold base (801) on the support platform (2).

5. A powder metallurgy valve seat ring molding molding device according to claim 4, characterized in that: The material guide assembly comprises an outer guide ring piece (901), an inner guide ring piece (902), and a connecting frame (903); the outer guide ring piece (901) and the inner guide ring piece (902) are both sleeved on the outer side of the mold assembly, the inner guide ring piece (902) is arranged on the inner side of the outer guide ring piece (901), the outer guide ring piece (901) and the inner guide ring piece (902) are connected and fixed by the connecting frame (903), and the outer guide ring piece (901) and the inner guide ring piece (902) form a V-shaped cross-section structure with an open bottom.

6. A powder metallurgy valve seat ring molding molding device according to claim 5, characterized in that: The material guide assembly also includes a slider (904); the left and right ends of the outer guide ring piece (901) are fixedly connected to the slider (904) through a cross bar, and a slide groove is longitudinally opened in the middle of the vertical frame, and the slider (904) is slidably connected in the slide groove.

7. A powder metallurgy valve seat ring molding molding device according to claim 6, characterized in that: A receiving ring groove (10) composed of two groups of concentric ring pieces is fixedly connected to the upper end of the support platform (2), a plurality of discharge openings (11) which are longitudinally penetrated and located at the lower side of the receiving ring groove (10) are opened on the support platform (2), and magnetic blocking pieces (12) corresponding to each discharge opening (11) are fixed on the bottom wall of the support platform (2) by magnetic attraction.

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