Vacuum sintering furnace for powder metallurgy

Abstract

The utility model provides a kind of vacuum sintering furnace for powder metallurgy, including furnace body, still including bearing assembly, heating assembly, heat preservation component, vacuum extraction component, water cooling component and waste gas treatment component, the utility model cooperates between vacuum component and is set, when being sintered to product again, air in inner furnace body is all extracted, selectively added protective gas again, to protect sintering process, to prevent oxidation reaction and composition metamorphosis of product because of the existence of gas on product surface when sintering, greatly increase the strength and quality of sintered product, by setting heat preservation component, the constant temperature in the inner furnace body is guaranteed by heat preservation component when heating product, effectively increase the sintering precision of product, to increase the quality of product, while reducing the loss of heat, reduce energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of sintering furnace technology, and in particular to a vacuum sintering furnace for powder metallurgy. Background Technology

[0002] Patent document CN222608014U discloses a powder injection molding vacuum sintering fixture, belonging to the technical field of vacuum sintering fixtures. The powder injection molding vacuum sintering fixture includes a furnace body, and further includes: an outer cavity and a heating cavity inside the furnace body, with a cooling cavity formed between the outer cavity and the heating cavity; an air duct connected above the cooling cavity; a blower connected to the air duct; a return water pipe connected to the outer cavity, with a first water pump installed on the return water pipe; a water tank fixed below the blower, with a cooling chamber inside the water tank, and cooling fins inside the cooling chamber; this invention improves the cooling effect of the rapid cooling chamber on the heating cavity by combining a circulating refrigeration system composed of coolant, water tank, cooling fins, and cooling chamber, with the airflow driven by the blower in the cooling chamber, thus saving cooling time.

[0003] However, during product processing, the vacuum sintering furnace generates waste gas. Directly releasing this waste gas can affect the lifespan of workers. Furthermore, the existing vacuum sintering furnace has poor insulation, leading to fluctuating temperatures during heating and reducing the final product quality. Therefore, it is necessary to improve this structure to overcome these shortcomings. Utility Model Content

[0004] The purpose of this invention is to provide a vacuum sintering furnace for powder metallurgy to solve the problems mentioned in the background art.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A vacuum sintering furnace for powder metallurgy includes a furnace body and further includes:

[0007] A support assembly is disposed in the furnace body, and the support assembly has a product placement space;

[0008] A heating component is disposed within a support component and surrounds the support component, thereby heating the inner side of the support component;

[0009] Thermal insulation component, which is disposed on the outside of the load-bearing component, increases the thermal insulation performance of the load-bearing component;

[0010] A vacuum extraction assembly is disposed on one side of the furnace body and connected to a support assembly on one side. The vacuum extraction assembly is used to evacuate the support assembly.

[0011] A water-cooled cooling component is installed on one side of the furnace body and is connected to the supporting component. The water-cooled cooling component cools the inside of the supporting component.

[0012] An exhaust gas treatment component is located on one side of the furnace body and is connected to the supporting component. The exhaust gas treatment component treats and discharges the exhaust gas generated during sintering.

[0013] The present invention is further configured such that the supporting component includes:

[0014] The inner furnace body is located inside the furnace body. The inner furnace body is rectangular in shape and has a connecting part facing outward. The connecting part is connected to the furnace body and provides a chamber for sintering.

[0015] A support plate is installed in the inner furnace body, and the surface of the support plate is provided with a space for placing products.

[0016] The present invention is further configured such that the heating component includes:

[0017] A fixed frame is provided, which is provided in pairs and is symmetrically arranged on the front and rear sides of the inner furnace body. The fixed frame is provided with mounting holes.

[0018] A set of heating tubes is provided, which are installed in the mounting holes of the fixed frame to heat the inner furnace body.

[0019] The present invention is further configured such that the heat insulation component includes:

[0020] An insulation layer is provided on the outside of the inner furnace body and is made of insulation material.

[0021] Insulation layer one, which is set inside the furnace body, is made of insulation material and insulates the inside of the furnace body.

[0022] The present invention is further configured such that the vacuum extraction component includes:

[0023] A vacuum pump is installed on one side of the furnace body and is used to evacuate the inner furnace body.

[0024] A vacuum pipe, one side of which is connected to a vacuum pump, and the other side of which is located in the inner furnace body;

[0025] A protective gas pipeline is connected to the inner furnace body, through which protective gas is delivered to the inner furnace body.

[0026] The present invention is further configured such that the water-cooled cooling component includes:

[0027] A chiller is located on one side of the furnace body and has an inlet and an outlet.

[0028] A water pump is installed on one side of the chiller. The water pump has an inlet and an outlet. The inlet of the water pump is connected to the outlet of the chiller through a pipe.

[0029] The water inlet pipe is connected to the water outlet of the water pump on one side, and the cooling water is transported through the water inlet pipe;

[0030] A heat exchange copper tube is connected to a water outlet pipe on one side. The heat exchange copper tube is arranged in a circuitous manner in the inner furnace body to exchange heat and cool the inner furnace body.

[0031] The outlet pipe is connected to the heat exchange copper pipe on one side and to the water inlet of the chiller on the other side. The outlet pipe transports the cooled water that has completed the heat exchange to the chiller.

[0032] The present invention is further configured such that the waste gas treatment component includes:

[0033] A blower is installed on one side of the furnace body to extract exhaust gas from the furnace body;

[0034] An exhaust duct is connected to a fan on one side and is located inside the furnace body on the other side, through which exhaust gas is transported.

[0035] A filter box is connected to the exhaust pipe. The filter box is equipped with a filter screen, which adsorbs large particles in the exhaust gas.

[0036] The purification box is located on one side of the filter box and is connected to the exhaust pipe through a pipe. The purification box is equipped with an activated carbon filter screen and is used to purify the exhaust gas.

[0037] The advantages of this utility model are:

[0038] 1. This utility model, by setting up a waste gas treatment component, after the product is sintered, the fan is started and the fan draws out the waste gas in the inner furnace through the exhaust pipe. During the transmission process, the filter plate in the filter box adsorbs and filters large particles. When it passes through the purification box, the activated carbon filter plate purifies it, so that the discharged gas will not cause harm to the staff and the environment.

[0039] 2. By setting up the vacuum components to work together, this utility model achieves the goal of completely extracting the air from the inner furnace body and selectively adding protective gas during the sintering process, thereby protecting the sintering process and preventing oxidation and compositional deterioration of the product surface due to the presence of gas during sintering. This greatly increases the strength and quality of the sintered product.

[0040] 3. By setting up a heat insulation component, this utility model ensures a constant temperature in the inner furnace body when the product is heated, effectively increasing the sintering precision of the product, thereby increasing the product quality, while reducing heat loss and energy consumption.

[0041] 4. By setting up a water-cooling component, after the product is heated, a water pump draws out the cooling water from the chiller and transmits it to the heat exchange copper tube through the outlet pipe. The heat exchange copper tube then exchanges heat with the inner furnace body to cool it down, thereby rapidly reducing the temperature of the inner furnace body and accelerating production efficiency. Attached Figure Description

[0042] Figure 1 This is a perspective view of the vacuum sintering furnace for powder metallurgy proposed in this utility model.

[0043] Figure 2 This is a front view of the vacuum sintering furnace for powder metallurgy proposed in this utility model.

[0044] Figure 3 This is a left view of the vacuum sintering furnace for powder metallurgy proposed in this utility model.

[0045] Figure 4 This is a schematic diagram of the inner furnace body proposed in this utility model.

[0046] Figure 5 This is a schematic diagram of the structure of the copper tube for heat exchange proposed in this utility model.

[0047] Figure 6 This is a schematic diagram of the tray placement structure proposed in this utility model.

[0048] Figure 7 This is a schematic diagram of the structure for the placement of the tray proposed in this utility model.

[0049] Figure 8 This utility model proposes Figure 6 A magnified view of a portion of the image.

[0050] Numerical designations: Furnace body 100, Inner furnace body 110, Connecting part 111, Support plate 120, Guide groove 121, Fixing frame 210, Heating tube 220, Insulation layer 310, Insulation layer one 320, Vacuum pump 410, Vacuum pipeline 420, Protective gas pipeline 430, Chiller 510, Water pump 520, Inlet water pipe 530, Heat exchange copper tube 540, Outlet water pipe 550, Fan 610, Exhaust pipe 620, Filter box 630, Purification box 640 Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0052] Example 1

[0053] like Figure 1-5 As shown, this utility model proposes a vacuum sintering furnace for powder metallurgy, including a furnace body 100, and further including a support component, a heating component, a heat preservation component, a vacuum extraction component, a water cooling component, and a waste gas treatment component. The support component is disposed in the furnace body and has a product placement space. The heating component is disposed in the support component and surrounds the support component, heating the inner side of the support component. The heat preservation component is disposed on the outer side of the support component to increase its heat preservation performance. The vacuum extraction component is disposed on one side of the furnace body and is connected to the support component, evacuating the support component. The water cooling component is disposed on one side of the furnace body and is connected to the support component, cooling the inner side of the support component. The waste gas treatment component is disposed on one side of the furnace body and is connected to the support component, treating and discharging the waste gas generated during sintering.

[0054] In this embodiment, the supporting component includes an inner furnace body 110 and a supporting plate 120. The inner furnace body is disposed in the furnace body and is rectangular in shape. A connecting part is provided on the inner furnace body and is disposed facing the outside of the inner furnace body. The connecting part is connected to the furnace body and the inner furnace body provides a chamber for sintering. The supporting plate is disposed in the inner furnace body and has a product placement space on its surface.

[0055] In this embodiment, the heating assembly includes a fixed frame 210 and a heating tube 220. There is a pair of fixed frames, which are symmetrically arranged on the front and rear sides of the inner furnace body. The fixed frame is provided with mounting holes. There is a set of heating tubes, which are installed in the mounting holes of the fixed frame, and the heating tubes heat the inner furnace body.

[0056] In this embodiment, the insulation component includes an insulation layer 310 and an insulation layer 320. The insulation layer is disposed on the outside of the inner furnace body and is made of insulation material. The insulation layer 320 is disposed on the inside of the furnace body and is made of insulation material. The insulation layer 320 insulates the inside of the furnace body.

[0057] In this embodiment, the vacuum extraction assembly includes a vacuum pump 410, a vacuum pipe 420, and a protective gas pipe 430. The vacuum pump is located on one side of the furnace body and is used to evacuate the inner furnace body. One side of the vacuum pipe is connected to the vacuum pump, and the other side of the vacuum pipe is located in the inner furnace body. The protective gas pipe is connected to the inner furnace body and is used to transport protective gas into the inner furnace body. The protective gas pipe is connected to a gas source (not shown in the figure), and a control valve is provided on the protective gas pipe.

[0058] In this embodiment, the water-cooled cooling assembly includes a chiller 510, a water pump 520, an inlet pipe 530, a heat exchange copper pipe 540, and an outlet pipe 550. The chiller is located on one side of the furnace body and has an inlet and an outlet. The water pump is located on one side of the chiller and has an inlet and an outlet. The inlet of the water pump is connected to the outlet of the chiller via a pipe. One side of the inlet pipe is connected to the outlet of the water pump, and the inlet pipe delivers cooling water. One side of the heat exchange copper pipe is connected to the outlet pipe. The heat exchange copper pipe is arranged in a circuitous manner within the inner furnace body, and the heat exchange copper pipe performs heat exchange and cooling of the inner furnace body. One side of the outlet pipe is connected to the heat exchange copper pipe, and the other side of the outlet pipe is connected to the inlet of the chiller, and the outlet pipe delivers the cooled water that has undergone heat exchange to the chiller.

[0059] In this embodiment, the waste gas treatment component includes a fan 610, an exhaust pipe 620, a filter box 630, and a purification box 640. The fan is located on one side of the furnace body and draws waste gas from the furnace body. One side of the exhaust pipe is connected to the fan, and the other side of the exhaust pipe is located inside the furnace body. The exhaust pipe is a metal pipe. The filter box is connected to the exhaust pipe and contains a filter screen to adsorb large particles in the waste gas. The purification box is located on one side of the filter box and is connected to the exhaust pipe through a pipe. The purification box contains an activated carbon filter screen to purify the waste gas.

[0060] Example 2

[0061] like Figure 1-8 As shown, the difference between this embodiment and embodiment 1 is that, in this embodiment, the support plate is provided with a guide groove 121, which is recessed toward the inner side of the support plate.

[0062] In this embodiment, the support plate is provided with multiple placement trays 710. Each placement tray has a guide block 711 at its bottom, the shape of which matches the guide groove shape of the support plate. One side of the placement tray has a recess 712 with a snap-fit ​​groove 713. The other side of the placement tray has a snap-fit ​​part 714, the shape of which matches the snap-fit ​​groove. The snap-fit ​​part of one placement tray can snap into the snap-fit ​​groove of another placement tray. When placing the product into the inner furnace body, due to the considerable depth, clamps are needed to hold the product in place, which can easily lead to… Product drops or collisions reduce product quality. By setting up placement trays, products are placed in the trays, and then individual placement trays are placed on the support plate. The guide block of the placement tray engages with the guide groove of the support plate. Then, the snap-fit ​​part of another placement tray is inserted into the snap-fit ​​groove of the recess. The placement tray is then pushed forward. Guided by the guide block, the placement tray can move deeper into the inner furnace body. When it is necessary to remove the product, because the snap-fit ​​part is engaged in the snap-fit ​​groove, only the one in front needs to be pulled out, and the subsequent placement trays will also be pulled out one by one, thus realizing the placement of the product deep into the inner furnace body.

[0063] The working principle of this utility model:

[0064] During the sintering process, the product is placed on the support plate of the inner furnace body, and then the vacuum pump is started. The vacuum pump extracts the gas from the inner furnace body through the vacuum pipeline, thus creating a vacuum chamber in the inner furnace body. At this time, the protective gas pipeline can inject protective gas into the inner furnace body. Then, the heating tube is started to heat the inner furnace body. After heating is completed, the water pump is started, and the water pump extracts the cooling water from the chiller and discharges it to the heat exchange copper tube. The heat exchange copper tube cools the inner furnace body by exchanging heat, thus causing the temperature in the inner furnace body to drop rapidly. The cooling water outlet pipe of the copper tube after heat exchange flows back to the chiller for cooling. At the same time, the fan is started, and the exhaust gas in the inner furnace body is extracted through the exhaust pipe. During the transportation of exhaust gas, the filter box performs initial filtration of large particles, and the purification box purifies the exhaust gas, thus treating the exhaust gas. The treated waste is then discharged, thus completing the sintering of the product.

[0065] In the description of this utility model, it should be noted that when terms such as "upper," "lower," "inner," "outer," "left," and "right" appear to indicate orientation or positional relationships, they should be understood as being based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product of this utility model is in use, or the orientation or positional relationships commonly understood by those skilled in the art. These terms are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, when terms such as "first" and "second" appear, they are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that unless otherwise explicitly specified and limited, terms such as "installation," "setting," and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A vacuum sintering furnace for powder metallurgy, comprising a furnace body, characterized in that, Also includes: A support assembly is disposed in the furnace body, and the support assembly has a product placement space; A heating component is disposed within a support component and surrounds the support component, thereby heating the inner side of the support component; Thermal insulation component, which is disposed on the outside of the load-bearing component, increases the thermal insulation performance of the load-bearing component; The insulation components include: An insulation layer is provided on the outside of the inner furnace body and is made of insulation material. Insulation layer one, which is set on the inside of the furnace body, is made of insulation material and insulates the inside of the furnace body by insulation layer one; A vacuum extraction assembly is disposed on one side of the furnace body and connected to a support assembly on one side. The vacuum extraction assembly is used to evacuate the support assembly. A water-cooled cooling component is installed on one side of the furnace body and is connected to the supporting component. The water-cooled cooling component cools the inside of the supporting component. An exhaust gas treatment component is located on one side of the furnace body and is connected to the supporting component. The exhaust gas treatment component treats and discharges the exhaust gas generated during sintering.

2. The vacuum sintering furnace for powder metallurgy according to claim 1, characterized in that, The carrier components include: The inner furnace body is located inside the furnace body. The inner furnace body is rectangular in shape and has a connecting part facing outward. The connecting part is connected to the furnace body and provides a chamber for sintering. A support plate is installed in the inner furnace body, and the surface of the support plate is provided with a space for placing products.

3. A vacuum sintering furnace for powder metallurgy according to claim 2, characterized in that, The heating components include: A fixed frame is provided, which is provided in pairs and is symmetrically arranged on the front and rear sides of the inner furnace body. The fixed frame is provided with mounting holes. A set of heating tubes is provided, which are installed in the mounting holes of the fixed frame to heat the inner furnace body.

4. A vacuum sintering furnace for powder metallurgy according to claim 2, characterized in that, The vacuum extraction assembly includes: A vacuum pump is installed on one side of the furnace body and is used to evacuate the inner furnace body. A vacuum pipe, one side of which is connected to a vacuum pump, and the other side of which is located in the inner furnace body; A protective gas pipeline is connected to the inner furnace body, through which protective gas is delivered to the inner furnace body.

5. A vacuum sintering furnace for powder metallurgy according to claim 2, characterized in that, The water-cooled cooling components include: A chiller is located on one side of the furnace body and has an inlet and an outlet. A water pump is installed on one side of the chiller. The water pump has an inlet and an outlet. The inlet of the water pump is connected to the outlet of the chiller through a pipe. The water inlet pipe is connected to the water outlet of the water pump on one side, and the cooling water is transported through the water inlet pipe; A heat exchange copper tube is connected to a water outlet pipe on one side. The heat exchange copper tube is arranged in a circuitous manner in the inner furnace body to exchange heat and cool the inner furnace body. The outlet pipe is connected to the heat exchange copper pipe on one side and to the water inlet of the chiller on the other side. The outlet pipe transports the cooled water that has completed the heat exchange to the chiller.

6. A vacuum sintering furnace for powder metallurgy according to claim 2, characterized in that, The exhaust gas treatment components include: A blower is installed on one side of the furnace body to extract exhaust gas from the furnace body; An exhaust duct is connected to a fan on one side and is located inside the furnace body on the other side, through which exhaust gas is transported. A filter box is connected to the exhaust pipe. The filter box is equipped with a filter screen, which adsorbs large particles in the exhaust gas. The purification box is located on one side of the filter box and is connected to the exhaust pipe through a pipe. The purification box is equipped with an activated carbon filter screen and is used to purify the exhaust gas.

Images