Non-pressure sintering furnace

Abstract

The utility model belongs to the technical field of sintering furnaces, and discloses a pressureless sintering furnace. The non-pressure sintering furnace comprises a furnace body, a heating rod, a baffle and a furnace door, a sintering cavity is formed in the furnace body, an opening communicated with the sintering cavity and the outside is further formed in one side of the furnace body, the heating rod is detachably arranged in the sintering cavity, the baffle is detachably installed in the sintering cavity and used for shielding the heating rod, and the furnace door is movably connected to one side of the opening of the furnace body. The cover is used for blocking or opening the opening. According to the non-pressure sintering furnace, the detachable baffle is arranged in the sintering cavity of the non-pressure sintering furnace and used for shielding and protecting the heating rod exposed in the sintering cavity, collision between a sintered product and the heating rod in the sintered product taking and placing process is avoided, and the heating rod is effectively prevented from being damaged in the sintered product taking and placing process; and when the heating rod is damaged due to other reasons and needs to be maintained or replaced, the baffle can be detached from the sintering cavity, and maintenance or replacement of the heating rod can be conveniently achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sintering furnace technical field especially relates to a pressureless sintering furnace. BACKGROUND

[0002] Pressureless sintering is a kind of material processing technology, is often applied to the preparation process of powder metallurgy and ceramic materials. In the pressureless sintering process, powder raw materials are placed under certain temperature and atmosphere conditions, and become dense, volume-stable, and have certain performance of solidified dense block through physical and chemical processes without applying any external pressure. The pressureless sintering furnace is the equipment for realizing the pressureless sintering process, and can heat and sinter metal, ceramic and other powders in air to obtain dense body materials with certain density and mechanical strength.

[0003] The pressureless sintering furnace usually adopts electric heating method, and the heating element is usually a silicon carbide heating rod, an iron-chromium-aluminum resistance wire heating rod or a ceramic heating rod. In the prior art, the heating rod is usually arranged exposed in the sintering furnace cavity.

[0004] However, the sintered product of the existing pressureless sintering furnace is easy to collide with the exposed heating rod during the taking and placing process of the sintered product, which causes the heating rod to crack and damage. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a pressureless sintering furnace, which solves the problem that the sintered product of the sintering furnace is easy to collide with the exposed heating rod in the prior art, causing the heating rod to crack and damage.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The pressureless sintering furnace comprises:

[0008] A furnace body, a sintering cavity is arranged in the furnace body, and an opening is further arranged on one side of the furnace body, which communicates with the sintering cavity and the outside;

[0009] A heating rod, which is detachably arranged in the sintering cavity;

[0010] A baffle, which is detachably installed in the sintering cavity and used for shielding the heating rod;

[0011] A furnace door, which is movably connected to one side of the opening of the furnace body to block or open the opening.

[0012] In one embodiment, the upper cavity wall and the lower cavity wall of the sintering cavity along the height direction of the sintering cavity are respectively provided with a sliding groove, the sliding groove extends along the depth direction of the sintering cavity, and the baffle is slidably connected with the sliding groove.

[0013] In one embodiment, a detachable limiting structure is provided at one end of the chute near the furnace door to limit the position of the baffle.

[0014] In one embodiment, the pressureless sintering furnace further includes a sintering pad, and a support member is provided on the side of the baffle facing away from the heating rod, with the sintering pad disposed on the support member.

[0015] In one embodiment, the sintering pad has uniformly distributed through holes.

[0016] In one embodiment, a transparent viewing window is provided on the furnace door.

[0017] In one embodiment, the pressureless sintering furnace further includes an image acquisition device, and the furnace door further includes a mounting bracket. The mounting bracket is disposed on the side of the furnace door away from the sintering chamber. The image acquisition device is mounted on the mounting bracket and can monitor the interior of the furnace body through the transparent window.

[0018] In one embodiment, the image acquisition device is hinged to the mounting bracket.

[0019] In one embodiment, the mounting bracket includes a base, a first hinge, and a second hinge. The first hinge is hinged to the base via a first pin, and the second hinge is hinged to the first hinge via a second pin. The image acquisition device is mounted on the second hinge, and the first pin is perpendicular to the second pin.

[0020] In one embodiment, a sealing ring is provided on the side of the furnace door that contacts the furnace body.

[0021] The beneficial effects of this utility model are:

[0022] This utility model provides a pressureless sintering furnace, including a furnace body, heating rods, a baffle, and a furnace door. The furnace body contains a sintering chamber, and one side of the furnace body has an opening connecting the sintering chamber to the outside. The heating rods are detachably installed inside the sintering chamber, and the baffle is detachably installed inside the sintering chamber to shield the heating rods. The furnace door is movably connected to the opening side of the furnace body to seal or open the opening. The detachable baffle inside the sintering chamber of the pressureless sintering furnace shields and protects the exposed heating rods, preventing collisions between the sintered products and the heating rods during product handling. This effectively prevents damage to the heating rods during product handling. Furthermore, when the heating rods are damaged for other reasons and require repair or replacement, the baffle can be removed from the sintering chamber, facilitating convenient repair or replacement. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the pressureless sintering furnace structure described in an embodiment of this utility model;

[0024] Figure 2 This is a schematic diagram of the groove structure described in an embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of the internal structure of the pressureless sintering furnace described in this embodiment of the utility model;

[0026] Figure 4 This is a schematic diagram of the baffle structure described in an embodiment of the present utility model;

[0027] Figure 5 This is a schematic diagram of the sintered pad structure according to an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the mounting bracket structure described in an embodiment of the present invention.

[0029] In the picture:

[0030] 1. Furnace body; 11. Sintering chamber; 111. Slide groove; 112. Limiting structure; 2. Heating rod; 3. Baffle; 31. Support component; 4. Furnace door; 41. Transparent window; 42. Mounting bracket; 421. Base; 422. First hinge; 423. Second hinge; 424. First pin; 425. Second pin; 5. Sintering pad; 51. Through hole; 6. Image acquisition device. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between 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.

[0033] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] like Figures 1-6 As shown, this utility model provides a pressureless sintering furnace, including a furnace body 1, heating rods 2, baffles 3, and a furnace door 4. A sintering cavity 11 is provided inside the furnace body 1. Optionally, the sintering cavity 11 is rectangular or cubic in shape. A rectangular opening communicating between the sintering cavity 11 and the outside is also provided on one side of the furnace body 1. The heating rods 2 are detachably mounted on the inner wall of the sintering cavity 11, serving as the heating structure of the pressureless sintering furnace. Exemplarily, the heating rods 2 can be silicon carbide heating rods, iron-chromium-aluminum resistance wire heating rods, or ceramic heating rods, etc. The baffles 3 are detachably installed inside the sintering cavity 11 to shield the heating rods 2. Specifically, the baffles 3 are high-temperature resistant ceramic baffles. The furnace door 4 is movably connected to one side of the opening of the furnace body 1 for sealing or opening the opening.

[0036] A removable baffle 3 is installed inside the sintering chamber 11 of the pressureless sintering furnace to shield and protect the heating rod 2 exposed inside the sintering chamber 11. This avoids collisions between the sintered product and the heating rod 2 during the loading and unloading of the sintered product, effectively preventing damage to the heating rod 2 during the loading and unloading of the sintered product. Moreover, when the heating rod 2 is damaged for other reasons and needs to be repaired or replaced, the baffle 3 can be removed from the sintering chamber 11, making it relatively convenient to repair or replace the heating rod 2.

[0037] Preferably, such as Figure 2As shown, the sintering cavity 11 has a sliding groove 111 on its upper and lower walls along its height direction. The sliding groove 111 extends along the depth direction of the sintering cavity 11. The baffle 3 is slidably connected to the sliding groove 111, facilitating the installation and removal of the baffle 3. Furthermore, a detachable limiting structure 112 is provided at the end of the sliding groove 111 near the furnace door 4 to limit the baffle 3 and prevent it from sliding out of the sliding groove 111 when the pressureless sintering furnace moves. In this embodiment, the limiting structure 112 is a limiting pin, and the sliding groove 111 has a limiting hole for the limiting pin to be inserted. In other embodiments, the limiting structure 112 can be replaced with other structures with limiting functions, which will not be described in detail here.

[0038] Preferably, such as Figure 4 and Figure 5 As shown, a support member 31 is provided on the side of the baffle 3 facing away from the heating rod 2. The support member 31 is used to install the sintering pad 5, thereby dividing the internal space of the sintering chamber 11 into multiple layers, enabling the simultaneous sintering of a large number of products and increasing the utilization efficiency of the internal space of the sintering chamber 11. The sintering pad 5 is slidably mounted on the support member 31. By pulling out or pushing in the sintering pad 5, the sintered products can be picked up and put in, simplifying the operation process. Specifically, the support member 31 is a slide rail, with multiple sets spaced along the height direction of the baffle 3, and the slide rail extends towards the opening of the sintering chamber 11. (Details follow...) Figure 5 As shown, the sintering pad 5 is a rectangular plate that matches the size of the sintering cavity 11. The sintering pad 5 has evenly distributed through holes, which are used for air circulation between the sintering pads 5 to keep the temperature of each area in the sintering cavity 11 consistent, thereby improving the sintering quality of the product. In this embodiment, the through holes are circular. In other embodiments, the through holes can be square, rhomboid, or elongated, which will not be described in detail here.

[0039] Furthermore, such as Figure 1 As shown, the furnace door 4 of the pressureless sintering furnace is also equipped with a transparent viewing window 41 for observing the sintering status of the products inside the sintering chamber 11. Optionally, the transparent viewing window 41 is made of a high-temperature resistant transparent ceramic material, such as alumina, yttrium oxide, or magnesium aluminum spinel. By observing the sintering status of the products inside the sintering chamber 11 through the transparent viewing window 41, when quality problems such as cracking occur in the sintered products, it is possible to accurately determine whether the parameter settings were incorrect during the debinding, heating, or cooling process, facilitating timely modification of the corresponding process parameters and reducing losses. To avoid bias caused by human observation, the furnace door 4 of the pressureless sintering furnace is also equipped with an image acquisition device 6. The image acquisition device 6 can photograph the sintering status of the products inside the sintering chamber 11, facilitating analysis when quality problems occur in the sintered products. Specifically, a mounting bracket 42 is provided on the side of the furnace door 4 away from the sintering chamber 11 and near the transparent viewing window 41, and the image acquisition device 6 is hinged to the mounting bracket 42.

[0040] Preferably, such as Figure 1 and Figure 6 As shown, the mounting bracket 42 includes a base 421, a first hinge 422, and a second hinge 423. The first hinge 422 is hinged to the base 421 via a first pin 424 and can rotate around the axial direction of the first pin 424. The second hinge 423 is hinged to the first hinge 422 via a second pin 425 and can rotate around the axial direction of the second pin 425. The image acquisition device 6 is mounted on the second hinge 423, allowing it to rotate around the axial directions of the first pin 424 and the second pin 425. Since the first pin 424 and the second pin 425 are perpendicular to each other, the image acquisition device 6 has a higher degree of freedom. Its position can be adjusted according to the placement of the sintered product, enabling omnidirectional image acquisition within the sintering cavity 11. To avoid the influence of high temperature on the monitoring image, the image acquisition device 6 in this embodiment is a blue light camera.

[0041] Preferably, a sealing ring is provided on the side of the furnace door 4 that contacts the furnace body 1, further enhancing the sealing performance of the pressureless sintering furnace and reducing heat loss. It is understood that the sealing ring has good high-temperature resistance, such as a high-temperature resistant asbestos sealing ring, to prevent damage when the heating rod 2 heats the sintering chamber 11.

[0042] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A pressureless sintering furnace, characterized in that, include: A furnace body (1) is provided inside the furnace body (1), and an opening connecting the sintering chamber (11) and the outside is also provided on one side of the furnace body (1); A heating rod (2) is detachably disposed within the sintering chamber (11); Baffle (3), which is detachably installed in the sintering chamber (11) to shield the heating rod (2); Furnace door (4), which is movably connected to one side of the opening of the furnace body (1) to block or open the opening.

2. The pressureless sintering furnace according to claim 1, characterized in that, The sintering cavity (11) is provided with a sliding groove (111) on the upper and lower walls along its height direction. The sliding groove (111) extends along the depth direction of the sintering cavity (11), and the baffle (3) is slidably connected to the sliding groove (111).

3. The pressureless sintering furnace according to claim 2, characterized in that, The slide (111) is provided with a detachable limiting structure (112) at one end near the furnace door (4) for limiting the baffle (3).

4. The pressureless sintering furnace according to claim 1, characterized in that, The pressureless sintering furnace also includes a sintering pad (5), and a support member (31) is provided on the side of the baffle (3) facing away from the heating rod (2), and the sintering pad (5) is provided on the support member (31).

5. The pressureless sintering furnace according to claim 4, characterized in that, The sintering pad (5) has uniformly distributed through holes (51).

6. The pressureless sintering furnace according to any one of claims 1-5, characterized in that, A transparent viewing window (41) is provided on the furnace door (4).

7. The pressureless sintering furnace according to claim 6, characterized in that, The pressureless sintering furnace also includes an image acquisition device (6), and the furnace door (4) also includes a mounting bracket (42). The mounting bracket (42) is located on the side of the furnace door (4) away from the sintering chamber (11). The image acquisition device (6) is mounted on the mounting bracket (42) and can monitor the interior of the furnace body (1) through the transparent window (41).

8. The pressureless sintering furnace according to claim 7, characterized in that, The image acquisition device (6) is hinged to the mounting bracket (42).

9. The pressureless sintering furnace according to claim 8, characterized in that, The mounting bracket (42) includes a base (421), a first hinge (422) and a second hinge (423). The first hinge (422) is hinged to the base (421) by a first pin (424), and the second hinge (423) is hinged to the first hinge (422) by a second pin (425). The image acquisition device (6) is mounted on the second hinge (423), and the first pin (424) is perpendicular to the second pin (425).

10. The pressureless sintering furnace according to any one of claims 1-5, characterized in that, A sealing ring is provided on the side of the furnace door (4) that contacts the furnace body (1).

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