A gantry-type sapphire crystal growing furnace

Abstract

The utility model relates to a gantry type sapphire crystal growing furnace, which comprises a furnace chamber assembly installed on a rack, a furnace cover assembly and a furnace bottom disc assembly arranged at the top and bottom of the furnace chamber assembly respectively, an upper pulling assembly connected to the furnace cover assembly, and a gantry assembly horizontally movable along the rack arranged at the two sides of the furnace chamber assembly, wherein the gantry assembly is provided with a furnace cover lifting assembly and the upper pulling assembly connected to the furnace cover assembly. The utility model has the advantages of reasonable structure design, increased furnace chamber size, improved load capacity, realized growth of oversized sapphire crystals, increased yield, low cost, high production efficiency, small floor area under the same yield, convenient loading and unloading operation, and adoption of the gantry type structure to lift the furnace cover and the seed crystal and removal of the furnace cover, which is particularly suitable for loading and unloading of heavy load crystals.

Description

Technical Field

[0001] This utility model relates to a crystal growth furnace, specifically a large gantry-type sapphire crystal growth furnace. Background Technology

[0002] In existing technologies, sapphire crystal growth furnaces are generally small in size, consisting of a cylindrical furnace cavity mounted on a base. Some furnace cavities have a rectangular opening on the side for a furnace door, used for loading and unloading materials; a lifting device is installed above the furnace; the furnace door needs to be opened manually during loading or unloading. Other furnaces have a lid located above the furnace cavity; opening the lid is used to shear the seed crystal, separating it from the grown crystal; unloading occurs below the furnace cavity, where the furnace tray moves downwards, pulling the crystal on it down, and then the crystal is removed.

[0003] The existing technology has the following problems: 1) Due to the small size and small loading capacity of the existing sapphire crystal growth furnace, the grown crystals are also small. 2) When the furnace door is installed on the side of the furnace cavity, opening the door requires manual operation, which is inconvenient and labor-intensive for workers. 3) The furnace tray lowering structure is relatively complex, especially when removing crystals, it is easy to hit the crucible and hot zone inside the furnace cavity, causing equipment damage. Utility Model Content

[0004] This utility model proposes a gantry-type sapphire crystal growth furnace, which aims to overcome the above-mentioned shortcomings of the existing technology, increase the volume of the sapphire crystal growth furnace, increase output, reduce labor intensity, and simplify loading and unloading operations.

[0005] The technical solution of this utility model is a gantry-type sapphire crystal growth furnace. Its structure includes a furnace chamber assembly mounted on a frame. A furnace cover assembly and a furnace base assembly are respectively located at the top and bottom of the furnace chamber assembly. An upper lifting assembly is connected to the furnace cover assembly. Gantry assemblies that can move horizontally along the frame are located on both sides of the furnace chamber assembly. A furnace cover lifting assembly and an upper lifting assembly, connected to the furnace cover assembly, are mounted on the gantry assembly. During loading and unloading, the furnace cover lifting assembly controls the furnace cover assembly to rise, and then the gantry assembly moves, causing the furnace cover assembly to leave the furnace chamber of the furnace chamber assembly. The entire operation can be automated.

[0006] Preferably, the gantry assembly includes a pair of columns, with a crossbeam connecting the tops of the columns, and the columns are mounted on linear guide rails on the frame. Without a drive unit, the gantry assembly is moved manually.

[0007] Preferably, a motor reducer is mounted on the frame, the output end of the motor reducer is connected to a lead screw, and the lead screw nut is connected to a column. A drive device is configured to drive it to move along a linear guide rail.

[0008] The advantages of this utility model are: reasonable structural design, which can increase the size of the furnace chamber, increase the load capacity, realize the growth of ultra-large sapphire crystals, increase the output, and have low cost and high production efficiency. It has a small footprint for the same output, and the loading and unloading operation is convenient. It adopts a gantry structure to lift the furnace cover and the seed crystal, and the furnace cover can be removed, which is particularly suitable for loading and unloading heavy-duty crystals. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of the gantry-type sapphire crystal growth furnace of this utility model.

[0010] Figure 2 yes Figure 1 Side view.

[0011] In the diagram, 1 is the frame, 2 is the furnace chamber assembly, 3 is the furnace bottom plate assembly, 4 is the furnace cover assembly, 5 is the gantry assembly, 6 is the furnace cover lifting assembly, and 7 is the upper lifting assembly. Detailed Implementation

[0012] The present invention will be further described in detail below with reference to embodiments and specific implementation methods.

[0013] like Figure 1 , 2 As shown, a gantry-type sapphire crystal growth furnace includes a furnace chamber assembly 2 mounted on a frame 1. The top and bottom of the furnace chamber assembly 2 are respectively provided with a furnace cover assembly 4 and a furnace bottom plate assembly 3. An upper lifting assembly 7 is connected to the furnace cover assembly 4. The frame 1 on both sides of the furnace chamber assembly 2 is provided with a gantry assembly 5 that can move horizontally along the frame 1. A furnace cover lifting assembly 6 and an upper lifting assembly 7 connected to the furnace cover assembly 4 are installed on the gantry assembly 5.

[0014] During loading and unloading, the furnace cover lifting assembly 6 controls the furnace cover assembly 4 to rise, and then the gantry assembly 5 moves, causing the furnace cover assembly 4 to leave the furnace chamber assembly 2. The entire operation can be automated.

[0015] It also includes cooling system components, protective gas components, heating power supply components, etc., which are set according to actual production needs.

[0016] Frame 1 is the basic component of this furnace, and all components are installed on frame 1.

[0017] Furnace chamber assembly 2 specifically includes a cylindrical furnace body, mounted on furnace base assembly 3. The furnace body contains a crucible, a heating zone, and cooling water channels within the furnace wall cavity. Crystal growth occurs within the furnace chamber, which is under slight positive pressure with argon gas circulating through it, and features a controllable heating zone (temperature heater). The furnace chamber maintains high purity; prior to crystal growth, a vacuum assembly uses a vacuum pump and piping to evacuate the furnace and circulate argon gas for purification.

[0018] The gantry assembly 5 includes a pair of columns connected by a crossbeam at their tops. The columns are mounted on linear guide rails on the frame 1. Without a drive unit, the gantry assembly 5 is moved manually. With a drive unit, a motor reducer is mounted on the frame 1, with a lead screw connected to its output. The lead screw nut is connected to the columns, driving them to move along the linear guide rails. The gantry assembly 5 supports the furnace cover lifting assembly 6 and the upper lifting assembly 7, used to lift the furnace cover assembly 4 and the seed crystal, and can also remove the furnace cover assembly 4.

[0019] The upper lifting assembly 7 is used to feed the seed crystal into the crucible, and the seed crystal moves upward during crystal growth. It includes parts such as a motor, reducer, lead screw, seed crystal pull rod, and linear guide rail. The motor and reducer are mounted on the crossbeam of the gantry assembly 5, and the output end is connected to the lead screw. The lead screw nut is connected to the seed crystal pull rod, which moves up and down along the linear guide rail. The seed crystal pull rod passes through the furnace cover assembly 4.

[0020] The furnace cover lifting assembly 6 comprises a motor, a reducer, gears, a rack, a support, and a connector, and is used to lift the furnace cover assembly 4. The furnace cover lifting assembly 6 is mounted on the column of the gantry assembly 5 via the support and connected to the furnace cover assembly 4 via the connector. Driven by the motor, the furnace cover assembly 4 is raised or lowered. The motor reducer mounted on the support on the column of the gantry assembly 5 is connected to a gear, which meshes with a rack. The rack is mounted on the connector, which connects to the furnace cover assembly 4.

[0021] The furnace cover assembly 4 includes parts such as a cover body, sealing elements, and connecting supports, which are used to seal the furnace chamber and prevent gas leakage from inside the furnace and the entry of external gas.

[0022] The furnace bottom assembly 3 includes parts such as the bottom plate and seals, and is used to support the crucible and crystal material.

[0023] All of the components described above are existing technologies, and those skilled in the art can use any model and existing design that can achieve their corresponding functions.

[0024] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present utility model, and these all fall within the protection scope of the present utility model.

Claims

1. A gantry-type sapphire crystal growth furnace, characterized in that, The furnace chamber assembly (2) is mounted on the frame (1). The top and bottom of the furnace chamber assembly (2) are respectively provided with a furnace cover assembly (4) and a furnace bottom plate assembly (3). The furnace cover assembly (4) is connected to an upper lifting assembly (7). The frame (1) on both sides of the furnace chamber assembly (2) is provided with a gantry assembly (5) that can move horizontally along the frame (1). The gantry assembly (5) is equipped with a furnace cover lifting assembly (6) and an upper lifting assembly (7) connected to the furnace cover assembly (4).

2. The gantry-type sapphire crystal growth furnace as described in claim 1, characterized in that, The gantry assembly (5) includes a pair of columns, with a crossbeam connecting the tops of the columns, and the columns are mounted on linear guide rails on the frame (1).

3. The gantry-type sapphire crystal growth furnace as described in claim 1, characterized in that, A motor reducer is installed on the frame (1), the output end of the motor reducer is connected to a lead screw, and the lead screw nut is connected to a column.

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