Furnace door structure for rapid denture sintering furnace

Abstract

The furnace door structure is matched with the rapid denture sintering furnace and comprises a furnace door frame, a furnace door and a burning table, the side, facing a hearth, of the furnace door is in a multi-step boss shape, a burning table hole is formed in the center of the furnace door, and the burning table is in a strip-shaped plate shape. One end of the burning table is fixedly arranged in a burning table hole of the furnace door, the burning table is horizontally arranged, the furnace door frame is made of metal, and the furnace door is embedded into the furnace door frame. According to the denture sintering device, a denture can obtain a good sintering temperature field, the denture sintering quality is stable, and rapid taking and placing can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of denture sintering furnaces, in particular to a furnace door structure for a denture rapid sintering furnace. Background Art

[0002] At present, the furnace door and sintering denture seat of most denture sintering furnaces on the market are integrated together, usually arranged at the lower part of the heating furnace body, and the furnace door is closed and opened in a rising and falling manner, such as a denture sintering furnace disclosed in Chinese patent No. CN207066101U, a denture sintering furnace disclosed in Chinese patent No. CN207945975U, and a denture sintering furnace disclosed in Chinese patent No. CN212692505U. In this way, the denture to be sintered can be sent to the furnace while closing the furnace door. However, in the denture sintering furnaces of these patents, during the sintering process, since the lower part of the denture is the furnace door, and this side of the furnace door does not heat up to generate heat, the temperature on this side is relatively low, which leads to unstable sintering quality due to uneven temperature field during the denture sintering process.

[0003] Even a few Chinese patents such as the one disclosed in the announcement number CN219531655U disclose a denture sintering furnace, which includes a sintering furnace body, a support device located on the sintering furnace body, and a sintering door. The sintering door is used to block the feed port of the sintering furnace body through the support device. The support device includes a support frame, a driving mechanism, and two rotating screws. The support frame is arranged on the sintering door, and the support frame is used to support the denture seat. A driving cavity is provided on the sintering furnace body, and the driving mechanism is arranged in the driving cavity. One end of the rotating screw is connected to the sintering door, and the other end of the rotating screw extending into the driving cavity is connected to the driving mechanism. The driving mechanism is used to drive the rotating screw to move. The present application provides a driving mechanism to facilitate the opening and closing of the sintering door as needed, which can expand the heat dissipation space of the denture and the denture seat, has high heat dissipation efficiency, and can improve the sintering efficiency of the denture. Although this sintering furnace can sinter dentures with stable quality, the furnace door structure of this sintering furnace, especially the obstruction of the rotating screw, is not very convenient for taking and placing dentures. Utility Model Content

[0004] In view of this, the purpose of the present invention is to address the deficiencies of the existing technology and provide a furnace door structure for a denture rapid sintering furnace, which not only enables the denture to obtain a good sintering temperature field and achieve stable denture sintering quality, but also enables rapid removal and placement.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A furnace door structure for a denture rapid sintering furnace is matched with a denture rapid sintering furnace, comprising a furnace door frame, a furnace door and a firing platform. The furnace door has a multi-step boss on the side facing the furnace chamber, a firing platform hole is provided at the center of the furnace door, the firing platform is in the shape of a strip plate, one end of the firing platform is fixedly arranged in the firing platform hole of the furnace door, the firing platform is arranged horizontally, the furnace door frame is made of metal, and the furnace door is embedded in the furnace door frame.

[0007] Furthermore, the cross-sectional view of the firing platform hole of the furnace door is T-shaped.

[0008] Furthermore, two upper and lower wedges are provided in the firing platform hole of the furnace door for clamping and fixing the firing platform.

[0009] Furthermore, the firing platform is made of high-temperature resistant ceramics.

[0010] Furthermore, the firing platform is provided with a plurality of through holes in the portion not located at the furnace door, forming a through-hole plate.

[0011] Furthermore, a heat-insulating layer is provided on the outer side of the furnace door, and the heat-insulating layer is located inside the furnace door frame.

[0012] Furthermore, the insulation layer is provided with an inlet and outlet hole of the same size as the support platform hole, and an insulation block is provided in the inlet and outlet hole.

[0013] Furthermore, the furnace door, the insulation layer and the insulation block are all made of block-shaped refractory materials.

[0014] Furthermore, the furnace door frame is made of metal.

[0015] Furthermore, the furnace door frame is provided with a metal baffle on the outside of the insulation layer, the metal baffle is provided with an opening at the insulation block, and the metal baffle is provided with a detachable baffle at the opening for replacing the firing platform.

[0016] Furthermore, a connecting plate is provided on the furnace door frame and is connected to the driving device, so that the furnace door can be opened and closed in a translational manner under the drive of the driving device.

[0017] The utility model discloses a furnace door structure for a rapid sintering furnace for dentures, which is used in a rapid sintering furnace for dentures. The furnace chamber of the sintering furnace is horizontally arranged, and the furnace door can be closed and opened by moving forward or backward in a horizontal straight line on the sintering furnace. A crucible containing the dentures is placed on the firing table on the furnace door. During the closing process of the furnace door, the crucible containing the dentures can be sent into the furnace chamber. This placement method allows the dentures to be away from the furnace door and penetrate into the interior of the furnace chamber, and sintered in a uniform temperature field. The sintering quality is high. At the same time, the connecting device on the furnace door frame is only located at one location on the connecting plate of the furnace door, so it is very convenient to take and place the crucible.

[0018] The beneficial effects of the utility model are:

[0019] The utility model discloses a furnace door structure for a rapid denture sintering furnace, which combines a firing platform and a furnace door together and is used for a denture sintering furnace with a horizontal opening and closing furnace door. Not only can the denture placed on the firing platform be brought deep into the center of the furnace chamber, so that the denture is in a uniform temperature field and excellent and stable dentures are sintered, but the denture can also be quickly taken in and out. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the appearance of the utility model.

[0021] Figure 2 It is a cross-sectional structural diagram of the present utility model.

[0022] Figure 3 This is a cross-sectional structural diagram of the utility model in a rapid denture sintering furnace.

[0023] In the figure: 10, furnace door frame; 11, baffle; 12, opening; 13, baffle; 14, connecting plate; 20, furnace door; 21, boss; 22, firing platform hole; 23, wedge; 30, firing platform; 31, through hole; 40, insulation layer; 41, access hole; 42, baffle. DETAILED DESCRIPTION

[0024] The present application is further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail. They can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0025] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various implementations, and the operational steps involved in each embodiment may be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a particular embodiment and do not imply a required composition and / or sequence.

[0026] Component numbers used herein, such as "first" and "second," are used solely to distinguish the components being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). Example

[0027] like Figure 1 、 Figure 2 and Figure 3 As shown, a furnace door structure for a denture rapid sintering furnace is matched with a denture rapid sintering furnace, wherein the furnace chamber of the denture sintering furnace is arranged horizontally and is cylindrical. A furnace door driving device is arranged at the lower part of the furnace chamber of the denture sintering furnace, specifically a linear slide, and a load-bearing plate is arranged on the slide.

[0028] A furnace door structure for a rapid sintering furnace for dentures includes a furnace door frame 10, a furnace door 20 and a firing platform 30. The furnace door 20 is made of lightweight refractory bricks, specifically lightweight alumina refractory bricks. The furnace door 20 has a multi-step boss 21 on the side facing the furnace chamber. The multi-step boss 21 cooperates with the furnace chamber of the rapid sintering furnace for dentures and is a two-step circular boss. A firing platform hole 22 is provided at the center of the furnace door 10. The hole is rectangular and has a T-shaped cross section.

[0029] The firing platform 30 is made of high-temperature resistant ceramic, specifically alumina ceramic with an alumina content of 99.9%, capable of withstanding temperatures of 1700°C for extended periods. It is flat and strip-shaped. The area of ​​the firing platform 30 located within the furnace chamber is provided with through-holes 31 arranged in an equidistant and staggered pattern. The remaining portion of the surface is free of holes.

[0030] Insert the non-perforated end of the sintering platform 30 into the sintering platform hole 22 of the furnace door 20. Two wedges 23 are placed within the sintering platform hole 22 to prevent it from moving up and down and maintain a relatively horizontal position. To maintain heat, the two wedges 23 are also made of lightweight refractory material, specifically lightweight alumina refractory bricks.

[0031] The furnace door 20 is provided with an insulation layer 40 on the outside. This insulation layer 40 is also made of the same lightweight refractory material as the furnace door 20 and is located within the furnace door frame 10. The insulation layer 40 has an access hole 41 of the same size as the firing platform hole 22. An insulation block 42 is located within this access hole 41. The insulation block 42 is made of the same material as the insulation layer and abuts against one end of the firing platform 30 and the wedge 23 to prevent the firing platform 30 from moving outward.

[0032] The furnace door frame is made of metal, specifically, it is made of stainless steel plates with a thickness of 1 mm bent and welded. The furnace door frame 10 is provided with a stainless steel baffle 11 on the outside of the insulation layer. The stainless steel baffle 11 is provided with an opening 12 at the insulation block 41. The stainless steel baffle is provided with a detachable stainless steel plate baffle 13 at the opening 12 to block the opening. After disassembly, the firing platform 30 can be replaced.

[0033] The furnace door frame 10 is provided with a connecting plate 14 made of a stainless steel plate with a thickness of 5 mm, which is connected to the driving device. Specifically, a lifting extension plate is provided on the slide of the linear slide. One end of the lifting extension plate is connected to the slide, and the other end is fixedly connected to the connecting plate by screws. In this way, under the drive of the driving device, that is, the linear slide moves forward and backward, to realize the translational opening and closing of the furnace door.

[0034] This utility model discloses a furnace door structure for a rapid denture sintering furnace. It is used for denture sintering. Conventional denture sintering temperatures do not exceed 900°C, and even the best zirconia dentures typically sinter at temperatures around 1450°C. The furnace door structure and firing platform of this utility model are both made of alumina refractory material. They can withstand high temperatures exceeding 1700°C for long periods of time, far exceeding the sintering temperature of zirconia dentures, and can be used for long periods without damage.

[0035] The utility model discloses a furnace door structure for a rapid denture sintering furnace, which is used for a rapid denture sintering furnace with a horizontally sliding door. The furnace door is integrated with a firing platform, which can deliver the denture to an area with a uniform temperature field in the furnace. The through holes arranged on the firing platform can minimize the obstruction of heat radiation and convection, so that the temperature field of the denture is always in a uniform and stable state during the sintering process, thereby achieving consistent quality sintering of the denture.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A furnace door structure for a rapid denture sintering furnace, used in conjunction with a rapid denture sintering furnace, characterized by: The invention comprises a furnace door frame (10), a furnace door (20) and a firing platform (30), wherein the furnace door (20) has a multi-step boss (21) on the side facing the furnace chamber, a firing platform hole (22) is provided at the center of the furnace door (10), the firing platform (30) is in the shape of a strip plate, one end of the firing platform (30) is fixedly arranged in the firing platform hole (22) of the furnace door (20), the firing platform (30) is arranged horizontally, the furnace door frame (10) is made of metal, and the furnace door (20) is embedded in the furnace door frame (10).

2. The furnace door structure for a rapid denture sintering furnace according to claim 1, characterized in that: The cross-sectional view of the firing platform hole (22) of the furnace door (20) is T-shaped.

3. The furnace door structure for a rapid denture sintering furnace according to claim 2, characterized in that: Two upper and lower wedge blocks (23) are provided in the firing platform hole (22) of the furnace door (20) for clamping and fixing the firing platform (30).

4. The furnace door structure for a rapid denture sintering furnace according to claim 1, characterized in that: The firing platform (30) is made of high-temperature resistant ceramics.

5. The furnace door structure for a rapid denture sintering furnace according to claim 4, characterized in that: The firing platform (30) is provided with a plurality of through holes (31) at a portion not located at the furnace door, forming a through-hole plate.

6. The furnace door structure for a rapid denture sintering furnace according to claim 1, characterized in that: An insulation layer (40) is provided on the outside of the furnace door (20), and the insulation layer (40) is located inside the furnace door frame (10). The insulation layer (40) has an entrance and exit hole (41) of the same size as the firing platform hole (22), and an insulation block (42) is provided inside the entrance and exit hole (41).

7. The furnace door structure for a rapid denture sintering furnace according to claim 6, characterized in that: The furnace door (20), the heat-insulating layer (40) and the heat-insulating stopper (42) are all made of block-shaped refractory materials.

8. The furnace door structure for a rapid denture sintering furnace according to claim 1, characterized in that: The furnace door frame (10) is provided with a metal baffle (11) on the outside of the insulation layer (40), the metal baffle (11) is provided with an opening (12) at the insulation block (42), and a detachable baffle (13) is provided at the opening (12) of the metal baffle.

9. The furnace door structure for a rapid denture sintering furnace according to claim 1, characterized in that: A connecting plate (14) is provided on the furnace door frame (10).

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