Hot pressing device for heat insulation silicon carbide ceramic fiber blanket

Abstract

The utility model relates to the technical field of ceramic fiber blanket processing, and particularly discloses a hot pressing device for a heat insulation silicon carbide ceramic fiber blanket, which comprises a device shell, a lower fixing seat is fixed in the device shell through screws, and a shaping mechanism for shaping raw materials is arranged on the upper surface of the lower fixing seat. The upper surface of the device shell is provided with a hot pressing mechanism used for hot pressing of raw materials. The shaping mechanism comprises a forming piece which is fixed to the upper surface of the lower fixing base through a screw. Through the arranged shaping mechanism, raw materials can be stored and subjected to hot pressing, when a linkage rod loses external thrust and in the process that an ejection spring extends and resets, a connecting plate can be pushed to reset, the connecting plate drives a movable rod to reset, an ejection plate pushes internally-formed workpieces to the outside, and then the automatic material returning effect is achieved; and manual material taking is not needed, and use is convenient.

Description

Technical Field

[0001] This utility model relates to the field of ceramic fiber blanket processing technology, and in particular to a hot pressing device for heat-insulating silicon carbide ceramic fiber blankets. Background Technology

[0002] Silicon carbide ceramics are high-performance ceramic materials, typically prepared via hot pressing sintering. Hot pressing sintering is a process that sintersects powdered materials under high temperature and high pressure to produce dense ceramic materials. The heating system provides the heat required for the hot pressing process, bringing the silicon carbide powder or fibers to the sintering temperature. The heating system is activated to heat the mold and raw materials to the predetermined sintering temperature. The pressure system is then activated to apply stable and adjustable pressure to the mold. Under the combined action of high temperature and high pressure, the silicon carbide powder or fibers bond together, forming a dense ceramic material.

[0003] Existing hot pressing equipment is prone to misalignment between silicon carbide seed crystal and graphite crucible lid during heating, and is also prone to generating pores. Air in the adhesive layer is not easy to escape, and the process is carried out in a completely open environment, resulting in rapid temperature loss, long processing time, and low production efficiency.

[0004] An existing patent (publication number: CN221740513U) discloses a seed crystal bonding hot pressing device. This device uses a downward-pressing cylinder to drive a guide rod, slowly pressing an upper hot pressing plate into a graphite crucible lid already coated with a silicon carbide seed crystal mixture. After the graphite crucible lid is completely compacted, the upper hot pressing plate and lower heating plate begin heating. Heating stops once the required temperature is reached. This effectively reduces the misalignment and porosity between the silicon carbide seed crystal and the graphite crucible lid during heating, and improves the relative flatness between the pressing plate and the graphite crucible lid when pressed down.

[0005] To address the aforementioned issues, while existing patents have proposed solutions that can effectively reduce the misalignment and porosity between the silicon carbide seed crystal and the graphite crucible cover during heating, and improve the relative flatness of the pressure plate and the graphite crucible cover when pressed down, the workpiece still needs to be manually removed from the forming cavity after the raw material is hot-pressed. Since the workpiece is tightly attached to the forming cavity, the manual material removal speed is slow, which is not conducive to use. Summary of the Invention

[0006] The purpose of this utility model is to provide a hot pressing device for heat-insulating silicon carbide ceramic fiber blankets, which can store and hot press raw materials. When the linkage rod loses external thrust, the connecting plate will be pushed to reset during the extension and reset process of the ejector spring. This causes the connecting plate to drive the movable rod to reset, and the ejector plate pushes the internally formed workpiece to the outside, thereby realizing the function of automatic material unloading. It eliminates the need for manual material handling, making it convenient to use and solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a hot pressing device for heat-insulating silicon carbide ceramic fiber blanket, comprising a device housing, a lower fixing seat fixed inside the device housing by screws, a shaping mechanism for shaping the raw material on the upper surface of the lower fixing seat, and a hot pressing mechanism for hot pressing the raw material on the upper surface of the device housing.

[0008] The shaping mechanism includes a molding component, which is fixed to the upper surface of the lower fixing seat by screws. A hot pressing cavity is formed on the upper surface of the molding component. An ejector plate is slidably connected inside the hot pressing cavity. Two movable rods penetrating the inner wall of the molding component are fixed on the lower surface of the ejector plate. A connecting plate is fixed on the lower surface of the movable rods. Two ejector springs are symmetrically fixed on the lower surface of the connecting plate.

[0009] Preferably, both ejector springs are equipped with guide rods that penetrate the interior of the connecting plate, and the guide rods are fixedly connected to the lower fixed seat.

[0010] Preferably, both ends of the connecting plate are fixed with a linkage rod that passes through the upper end of the lower fixed seat.

[0011] Preferably, the hot pressing mechanism includes two hydraulic cylinders, both of which are fixed to the upper surface of the device housing by bolts.

[0012] Preferably, the telescopic ends of both hydraulic cylinders are fixed to upper mounting bases through the outer casing of the device.

[0013] Preferably, a hot press plate is fixed to the lower surface of the upper fixed seat, and a plurality of heating tubes are installed inside the hot press plate.

[0014] Preferably, four guide members are symmetrically fixed on the outer surface of the fixed base, and each of the four guide members is slidably connected to a limiting rod that is fixedly connected to the inner wall of the device housing.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The set-forming mechanism can store and heat-press the raw materials. When the linkage rod loses external thrust, the ejector spring will push the connecting plate to reset during its own extension and reset process. This causes the connecting plate to drive the movable rod to reset, and the ejector plate pushes the internally formed workpiece to the outside, thereby achieving the function of automatic material unloading. No manual material handling is required, making it convenient to use.

[0017] 2. Through the set hot pressing mechanism, the set hydraulic cylinder drives the upper fixed seat to move vertically, so that the hot pressing plate moves into the hot pressing cavity, and the set heating tube is activated to heat the hot pressing plate. Through the guide set on the upper fixed seat, with the cooperation of the limit rod, it can play a guiding role. The hot pressing plate is inserted into the hot pressing cavity to hot press the raw material. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is an overall structural view of the present invention;

[0020] Figure 2 This is a half-sectional structural diagram of the outer shell of the device of this utility model;

[0021] Figure 3 This is a half-sectional structural diagram of the lower fixing seat of this utility model;

[0022] Figure 4 This is a half-sectional structural diagram of the upper fixing seat of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Device housing; 2. Lower fixed seat; 3. Molded part; 31. Hot pressing chamber; 32. Ejector plate; 33. Movable rod; 34. Connecting plate; 35. Ejector spring; 36. Guide rod; 37. Linkage rod; 4. Hydraulic cylinder; 41. Upper fixed seat; 42. Hot pressing plate; 43. Heating tube; 44. Guide part; 5. Limiting rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] This utility model provides a technical solution:

[0027] Please see Figures 1 to 4A hot pressing device for heat-insulating silicon carbide ceramic fiber blanket includes a device shell 1, a lower fixing seat 2 fixed inside the device shell 1 by screws, a shaping mechanism for shaping the raw material on the upper surface of the lower fixing seat 2, and a hot pressing mechanism for hot pressing the raw material on the upper surface of the device shell 1.

[0028] The shaping mechanism includes a molding part 3, which is fixed to the upper surface of the lower fixed seat 2 by screws. A hot pressing cavity 31 is opened on the upper surface of the molding part 3. An ejector plate 32 is slidably connected inside the hot pressing cavity 31. Two movable rods 33 penetrating the inner wall of the molding part 3 are fixed on the lower surface of the ejector plate 32. A connecting plate 34 is fixed on the lower surface of the movable rods 33. Two ejector springs 35 are symmetrically fixed on the lower surface of the connecting plate 34. A guide rod 36 penetrating the interior of the connecting plate 34 is installed inside the two ejector springs 35. The guide rod 36 is fixedly connected to the lower fixed seat 2. Linkage rods 37 penetrating the upper end of the lower fixed seat 2 are fixed at both ends of the connecting plate 34.

[0029] By adopting the above technical solution, before using the hot pressing device for the insulating silicon carbide ceramic fiber blanket, the outer shell 1 of the device is first placed in a suitable position. The universal wheels on the outer shell 1 facilitate the movement of the device. The material to be hot-pressed is poured into the hot pressing cavity 31 opened on the molding part 3. During hot pressing, the linkage rod 37 is pushed vertically into the downward fixed seat 2. At this time, the linkage rod 37 drives the connecting plate 34 to move synchronously, so that the connecting plate 34 drives the movable rod 33 to move, and the ejector plate 32 is synchronously driven to... The bottom of the hot pressing chamber 31 ensures the hot pressing effect on the raw material. After the raw material is hot-pressed and formed, the hydraulic cylinder 4 drives the upper fixed seat 41 to move and reset. At this time, the linkage rod 37 loses the external thrust. During the process of the ejector spring 35 extending and resetting, it will push the connecting plate 34 to reset. The guide rod 36 can play a guiding and limiting role, so that the connecting plate 34 drives the movable rod 33 to reset. The ejector plate 32 pushes the internally formed workpiece to the outside, thereby realizing the automatic material unloading function. There is no need for manual material handling, which is convenient to use.

[0030] Specifically, such as Figure 1 and Figure 4 As shown, the hot pressing mechanism includes hydraulic cylinders 4. There are two hydraulic cylinders 4, and both hydraulic cylinders 4 are fixed to the upper surface of the device housing 1 by bolts. The telescopic ends of the two hydraulic cylinders 4 pass through the device housing 1 and are fixed to an upper fixed seat 41. A hot pressing plate 42 is fixed to the lower surface of the upper fixed seat 41. Several heating tubes 43 are installed inside the hot pressing plate 42. Four guide members 44 are symmetrically fixed to the outer surface of the upper fixed seat 41. The interior of each of the four guide members 44 is slidably connected to a limiting rod 5 that is fixedly connected to the inner wall of the device housing 1.

[0031] By adopting the above technical solution, the hydraulic cylinder 4 is activated, driving the upper fixed seat 41 to move vertically, causing the hot press plate 42 to move towards the hot press cavity 31. The heating tube 43 is activated to heat the hot press plate 42. The guide member 44 on the upper fixed seat 41, in cooperation with the limiting rod 5, can play a guiding role. At this time, the hot press plate 42 is inserted into the hot press cavity 31 to hot press the raw material. The bottom of the upper fixed seat 41 and the linkage rod 37 on the lower fixed seat 2 are in contact.

[0032] Working principle: The material to be hot-pressed is poured into the hot-pressing chamber 31. The hydraulic cylinder 4 drives the upper fixed seat 41 to move vertically, causing the hot-pressing plate 42 to move into the hot-pressing chamber 31. The heating tube 43 heats the hot-pressing plate 42. The guide member 44 on the upper fixed seat 41, in cooperation with the limiting rod 5, plays a guiding role. At this time, the hot-pressing plate 42 is inserted into the hot-pressing chamber 31 to hot-press the raw material. The bottom of the upper fixed seat 41 contacts the linkage rod 37 on the lower fixed seat 2, which in turn pushes the linkage rod 37 to move vertically into the lower fixed seat 2. The moving rod 37 drives the connecting plate 34 to move synchronously, which in turn drives the movable rod 33 to move, thus moving the ejector plate 32 to the bottom of the hot pressing chamber 31. This ensures the hot pressing effect on the raw material. After the raw material is hot-pressed, the hydraulic cylinder 4 drives the upper fixed seat 41 to move and reset. The linkage rod 37 loses external thrust. During the process of the ejector spring 35 extending and resetting, it pushes the connecting plate 34 to reset. The guide rod 36 can play a guiding and limiting role, so that the connecting plate 34 drives the movable rod 33 to reset. The ejector plate 32 pushes the internally formed workpiece to the outside.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A hot pressing device for insulating silicon carbide ceramic fiber blankets, comprising a device housing (1), characterized in that: The device housing (1) is fixed inside by screws to a lower fixing seat (2). The upper surface of the lower fixing seat (2) is provided with a shaping mechanism for shaping the raw material. The upper surface of the device housing (1) is provided with a hot pressing mechanism for hot pressing the raw material. The shaping mechanism includes a molding part (3), which is fixed to the upper surface of the lower fixing seat (2) by screws. A hot pressing cavity (31) is opened on the upper surface of the molding part (3). An ejector plate (32) is slidably connected inside the hot pressing cavity (31). Two movable rods (33) penetrating the inner wall of the molding part (3) are fixed on the lower surface of the ejector plate (32). A connecting plate (34) is fixed on the lower surface of the movable rods (33). Two ejector springs (35) are symmetrically fixed on the lower surface of the connecting plate (34).

2. The hot pressing device for a heat-insulating silicon carbide ceramic fiber blanket according to claim 1, characterized in that: Both ejector springs (35) have guide rods (36) installed inside the connecting plate (34), and the guide rods (36) are fixedly connected to the lower fixed seat (2).

3. The hot pressing device for a heat-insulating silicon carbide ceramic fiber blanket according to claim 2, characterized in that: Both ends of the connecting plate (34) are fixed with a linkage rod (37) that passes through the upper end of the lower fixed seat (2).

4. The hot pressing device for a heat-insulating silicon carbide ceramic fiber blanket according to claim 1, characterized in that: The hot pressing mechanism includes two hydraulic cylinders (4), both of which are fixed to the upper surface of the device housing (1) by bolts.

5. The hot pressing device for a heat-insulating silicon carbide ceramic fiber blanket according to claim 4, characterized in that: The telescopic ends of both hydraulic cylinders (4) are fixed to the upper fixed seat (41) through the outer shell (1) of the device.

6. The hot pressing device for an insulating silicon carbide ceramic fiber blanket according to claim 5, characterized in that: A hot press plate (42) is fixed on the lower surface of the upper fixed seat (41), and a number of heating tubes (43) are installed inside the hot press plate (42).

7. The hot pressing device for a heat-insulating silicon carbide ceramic fiber blanket according to claim 6, characterized in that: Four guide members (44) are symmetrically fixed on the outer surface of the upper fixed seat (41), and the interior of each of the four guide members (44) is slidably connected to a limiting rod (5) that is fixedly connected to the inner wall of the device housing (1).

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