Boron carbide special-shaped pellet hot pressing sintering mold
By introducing a cylinder-driven graphite perforated mold plug and limiting hole design into the hot pressing sintering mold, and combining it with the gas discharge component, the problems of rough pressure control and inaccurate guiding and limiting in traditional molds are solved, and high-precision molding and quality improvement of boron carbide irregular core blocks are achieved.
Patent Information
- Application Number
- CN202422921460.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-11-28
AI Technical Summary
Traditional hot pressing sintering molds have rough pressure control during the pressing process and cannot be precisely adjusted, resulting in poor core density or mold damage. In addition, the lack of guiding and limiting design leads to loss of control over the shape accuracy of irregular cores, making it difficult for gas to escape and forming air cavities, which affects product quality.
The graphite perforated mold plug driven by a cylinder cooperates with the limiting hole to ensure precise pressure application; the air blowing component discharges gas through an air compressor, and combined with the limiting block and spring design, it realizes smooth gas discharge, ensuring excellent atmosphere inside the mold. The mold design provides precise guidance and limiting, ensuring molding quality.
It achieves high-precision molding of boron carbide irregular-shaped core blocks, avoids cavitation formation, improves product density and mechanical strength, and ensures the reliability and consistency of molding quality.
Smart Images
Figure CN223663734U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to hot pressing sintering equipment technical field especially relates to borocarbide special-shaped core block hot pressing sintering mould. BACKGROUND
[0002] In the field of advanced material manufacturing, borocarbide special-shaped core block has indispensable application in many high-end industries such as aerospace, national defense and military industry, mechanical processing and the like because of its excellent hardness, wear resistance and chemical stability, and like aviation engine wear-resistant parts and bulletproof armor key structural parts often rely on high-quality borocarbide special-shaped core block to guarantee performance.
[0003] And hot pressing sintering mould as the core equipment of processing borocarbide raw material into precision special-shaped core block, its design level and work efficiency play a decisive role in product quality and production efficiency.
[0004] But in the traditional pressure forming link, pressure is often applied with manual screw press or simple hydraulic device, pressure control is rough, cannot be accurately adjusted according to different process stages and raw material characteristics, and the density of core block is poor due to insufficient pressure, or the mould and product are damaged due to excessive pressure; and the pressure process lacks accurate design of guiding and limiting, and the key components such as mould plug move easily and are inclined, so that the shape accuracy of special-shaped core block is out of control, the size deviation exceeds the tolerance range, the gas generated in the hot pressing process is difficult to discharge, and the high-pressure "air pocket" is formed in the mould cavity, which hinders the close combination of raw material particles, and the defects such as core block internal pore and crack frequently occur, which weakens the mechanical strength and reliability of the product. UTILITY MODEL CONTENTS
[0005] In order to make up for the above shortcomings, the utility model provides borocarbide special-shaped core block hot pressing sintering mould, aims at improving the problems in the prior art that pressure control is rough, cannot be accurately adjusted according to different process stages and raw material characteristics, the density of core block is poor due to insufficient pressure, or the mould and product are damaged due to excessive pressure; and the pressure process lacks accurate design of guiding and limiting, and the key components such as mould plug move easily and are inclined, so that the shape accuracy of special-shaped core block is out of control, the size deviation exceeds the tolerance range, the gas generated in the hot pressing process is difficult to discharge, and the high-pressure "air pocket" is formed in the mould cavity, which hinders the close combination of raw material particles, and the defects such as core block internal pore and crack frequently occur.
[0006] In order to achieve the above object, the utility model provides the following technical scheme: boron carbide special-shaped core block hot pressing sintering mould, including work table, the upside fixedly connected with the fixing frame of work table, the inner bottom fixed mounting of fixing frame has heating assembly, the inside fixed connection base of heating assembly, the upper portion fixedly connected with mould main part of base, be provided with the pressing assembly on the fixed frame, the inside of work table is provided with blowing assembly, the heating assembly includes heating furnace, the inner bottom of fixed frame is fixedly connected with heating furnace, the inner wall fixed mounting of heating furnace has heating wire.
[0007] Further, the pressing assembly includes a cylinder, the cylinder is fixedly installed on the fixed frame, the telescopic end of the cylinder is fixedly connected with a furnace cover, the lower side of the furnace cover is fixedly connected with a graphite perforated die plug, the lower side of the graphite perforated die plug is fixedly connected with a mandrel, and the inside of the base is provided with a limiting hole.
[0008] Further, the blowing assembly includes an air compressor, the air compressor is fixedly installed on the workbench, the upper side of the air compressor is fixedly connected with an air inlet pipe, the air inlet pipe is fixedly connected to the front side of the heating furnace, the inside of the mould main body is provided with an exhaust assembly, and the outside of the mould main body is provided with a limiting assembly.
[0009] Further, the exhaust assembly includes a spring, the spring is fixedly connected in the inside of the heating furnace, the outside of the spring is fixedly connected with a plug, and the inside of the heating furnace is provided with a channel.
[0010] Further, the limiting assembly includes a rotating seat, the rotating seat is fixedly connected to the outside of the mould main body, and the inside of the rotating seat is rotatably connected with a limiting block.
[0011] Further, the inside of the mould main body is provided with a mould cavity.
[0012] Further, the mandrel is slidingly connected in the inside of the limiting hole.
[0013] Further, the graphite perforated die plug is slidingly connected in the inside of the heating furnace.
[0014] The utility model has the advantages of:
[0015] 1. The utility model discloses a fixed frame air cylinder starts operation immediately when the temperature reaches the standard required by hot-pressing sintering, and the telescopic end orderly stretches downward, stably pulls the furnace cover to move downward synchronously. The graphite opening die plug closely connected at the bottom of the furnace cover continuously moves downward along the inner wall of the heating furnace smoothly, and the fixed core shaft at the lower side accurately fits in the limiting hole of the base and slides, like being guided by the precision guide, to ensure that the whole downward trajectory is stable and accurate, and the graphite opening die plug continuously penetrates the mold cavity, and cooperates with the heating environment to promote the physical change of raw materials under the double action, and through the hot-pressing sintering process, the raw materials are gradually transformed into the special-shaped core block meeting the design requirements, so that the density and quality of the product are optimized and upgraded, and the performance is more excellent and the quality is more reliable.
[0016] 2. In the hot-pressing process, the limiting block on the rotating seat can be flexibly adjusted as required, so that the plug in the heating furnace is timely popped out under the support of the spring elastic force, and a smooth exhaust passage is built, the gas generated by hot-pressing is orderly discharged along the passage and the gap between the plug, the gas accumulation problem is successfully solved, and the negative influence on the core block forming quality is avoided, at the same time, the air compressor of the air blowing assembly operates efficiently, and air is continuously input into the heating furnace through the air inlet pipe, the atmosphere in the furnace is effectively improved, and various impurities are removed, so that the hot-pressing environment is excellent, and after sintering, the boron carbide special-shaped core block formed can be conveniently taken out from the mold cavity. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the perspective view of the boron carbide special-shaped core block hot-pressing sintering mold provided by the utility model;
[0018] Figure 2 It is the internal structure schematic view of the heating furnace of the boron carbide special-shaped core block hot-pressing sintering mold provided by the utility model;
[0019] Figure 3 It is the heating assembly structure schematic view of the boron carbide special-shaped core block hot-pressing sintering mold provided by the utility model;
[0020] Figure 4 It is the lower pressing assembly structure schematic view of the boron carbide special-shaped core block hot-pressing sintering mold provided by the utility model;
[0021] Figure 5 It is the A structure schematic view of the boron carbide special-shaped core block hot-pressing sintering mold provided by the utility model.
[0022] Legend:
[0023] 1, workbench; 2, fixed frame; 3, heating assembly; 31, heating furnace; 32, heating wire; 4, base; 5, mold body; 6, pressing assembly; 61, air cylinder; 62, graphite hole die; 63, mandrel; 64, limiting hole; 65, furnace cover; 7, blowing assembly; 71, air compressor; 72, air inlet pipe; 73, channel; 74, spring; 75, plug; 76, limiting block; 77, rotating seat; 8, mold cavity. DETAILED DESCRIPTION
[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0025] Referring to Figure 1 , Figure 2 and Figure 3 , the utility model provides an embodiment: boron carbide special-shaped core block hot-pressing sintering mold, including workbench 1, the upside of workbench 1 is fixedly connected with fixed frame 2, the inner bottom of fixed frame 2 is fixedly installed with heating assembly 3, the inside of heating assembly 3 is fixedly connected with base 4, the upper portion of base 4 is fixedly connected with mold body 5, and fixed frame 2 is provided with pressing assembly 6, and the inside of workbench 1 is provided with blowing assembly 7; heating assembly 3 includes heating furnace 31, and heating furnace 31 is fixedly connected to the inner bottom of fixed frame 2, and heating wire 32 is fixedly installed on the inner wall of heating furnace 31;
[0026] First, the boron carbide raw material is accurately placed into the mold cavity 8 of the mold body 5, the core heating furnace 31 is stably fixed in the inner bottom of the fixed frame 2, the heating wire 32 of the inner wall is electrified to generate heat, the heat is uniformly diffused in the furnace, and is transmitted to the mold body 5 fixed on the base 4, so that the boron carbide raw material in the mold cavity 8 is gradually heated to a high-temperature environment required for hot-pressing sintering.
[0027] Referring to Figure 1 , Figure 2 and Figure 4 , the pressing assembly 6 includes the air cylinder 61, the air cylinder 61 is fixedly installed on the fixed frame 2, the telescopic end of the air cylinder 61 is fixedly connected with the furnace cover 65, the lower side of the furnace cover 65 is fixedly connected with the graphite hole die 62, the lower side of the graphite hole die 62 is fixedly connected with the mandrel 63, and the limiting hole 64 is formed in the inside of the base 4;
[0028] When the temperature reaches the standard, the cylinder 61 on the fixing frame 2 starts to work, the telescopic end steadily extends downward, the furnace cover 65 synchronously moves downward, the graphite opening die plug 62 connected to the bottom of the furnace cover 65 smoothly slides along the inner wall of the heating furnace 31, the fixed mandrel 63 at the lower side accurately slides in the limiting hole 64 of the base 4, which guarantees the stable and deviation-free downward path, continuously presses the graphite opening die plug 62 into the die cavity 8, applies stable pressure on the boron carbide raw material in the high-temperature state, cooperates with the heating condition, strongly drives the raw material to heat-press sintering, and gradually forms the required special-shaped briquettes.
[0029] With reference to Figure 1 , Figure 2 and Figure 5 , the air blowing assembly 7 comprises an air compressor 71 fixedly installed on the workbench 1, the upper side of the air compressor 71 is fixedly connected with an air inlet pipe 72, the air inlet pipe 72 is fixedly connected to the front side of the heating furnace 31, the inside of the mold main body 5 is provided with an exhaust assembly, the outside of the mold main body 5 is provided with a limiting assembly, the exhaust assembly comprises a spring 74 fixedly connected to the inside of the heating furnace 31, the outside of the spring 74 is fixedly connected with a plug 75, the inside of the heating furnace 31 is provided with a channel 73, the limiting assembly comprises a rotating seat 77 fixedly connected to the outside of the mold main body 5, the inside of the rotating seat 77 is rotatably connected with a limiting block 76, the inside of the mold main body 5 is provided with a die cavity 8, the mandrel 63 is slidingly connected to the inside of the limiting hole 64, and the graphite opening die plug 62 is slidingly connected to the inside of the heating furnace 31.
[0030] During the heat-pressing process, the limiting block 76 on the rotating seat 77 is flexibly adjusted, so that the plug 75 in the heating furnace 31 is elastically supported by the spring 74 and pops out, the gas can be orderly discharged through the gap between the channel 73 and the plug 75, effectively avoiding the interference of gas accumulation on the quality of the briquette forming, at the same time, the air compressor 71 of the air blowing assembly 7 works, air is delivered to the heating furnace 31 through the air inlet pipe 72, the atmosphere in the furnace is improved, and the impurities are discharged, the boron carbide special-shaped briquettes sintered and formed are conveniently taken out from the die cavity 8 through the setting of the die cavity 8, the mandrel 63 is slidingly connected to the inside of the limiting hole 64, which guarantees the stable and deviation-free downward path, the graphite opening die plug 62 is slidingly connected to the inside of the heating furnace 31, which applies stable pressure on the boron carbide raw material in the high-temperature state, cooperates with the heating condition, strongly drives the raw material to heat-press sintering, and gradually forms the required special-shaped briquettes.
[0031] Working principle: when using the device, first, the boron carbide raw material is accurately placed in the mold cavity 8 of the mold main body 5, the core heating furnace 31 is stably arranged in the bottom of the fixed frame 2, the heating wire 32 of the inner wall is electrified to generate heat, which promotes the boron carbide raw material in the mold cavity 8 to gradually heat to the high temperature environment required for hot pressing sintering, when the temperature reaches the standard, the air cylinder 61 on the fixed frame 2 starts, the telescopic end steadily extends downward, the furnace cover 65 moves downward synchronously, the graphite opening die plug 62 connected at the bottom of the furnace cover 65 smoothly slides along the inner wall of the heating furnace 31, the fixed core shaft 63 at the lower side accurately slides in the limiting hole 64 of the base 4, which ensures the stable and deviation-free downward sliding path, and the graphite opening die plug 62 continuously presses into the mold cavity 8, which applies stable pressure to the boron carbide raw material in the high temperature state, cooperates with the heating condition, and strongly drives the raw material to hot pressing sintering, so that it is gradually formed into a special-shaped core block meeting the requirements, and the density and quality are optimized and improved through bidirectional action, during the hot pressing process, the limiting block 76 on the rotating seat 77 is flexibly adjusted, so that the plug 75 in the heating furnace 31 is elastically supported by the spring 74 and is popped out, and the gas can be orderly discharged through the gap between the channel 73 and the plug 75, at the same time, the air compressor 71 of the air blowing assembly 7 operates, air is delivered to the heating furnace 31 through the air inlet pipe 72, the atmosphere in the furnace is improved, and the impurities are discharged, the telescopic end of the air cylinder 61 reversely retracts, drives the related parts to move upward and return to the original position, and then the boron carbide special-shaped core block sintered and formed can be conveniently taken out from the mold cavity 8, and the whole hot pressing sintering and demolding process is smoothly completed.
[0032] Finally, it should be pointed out that: the above only describes the preferred embodiments of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A hot pressing and sintering mold for boron carbide shaped core blocks, comprising a worktable (1), characterized in that: A fixed frame (2) is fixedly connected to the upper side of the workbench (1). A heating component (3) is fixedly installed at the bottom inner side of the fixed frame (2). A base (4) is fixedly connected inside the heating component (3). A mold body (5) is fixedly connected to the upper part of the base (4). A pressing component (6) is provided on the fixed frame (2). An air blowing component (7) is provided inside the workbench (1). The heating component (3) includes a heating furnace (31). The heating furnace (31) is fixedly connected to the bottom inner side of the fixed frame (2). A heating wire (32) is fixedly installed on the inner wall of the heating furnace (31).
2. The hot pressing and sintering mold for boron carbide shaped core blocks according to claim 1, characterized in that: The pressing assembly (6) includes a cylinder (61), which is fixedly mounted on the mounting bracket (2). The telescopic end of the cylinder (61) is fixedly connected to a furnace cover (65). A graphite perforated mold plug (62) is fixedly connected to the lower side of the furnace cover (65). A mandrel (63) is fixedly connected to the lower side of the graphite perforated mold plug (62). A limit hole (64) is opened inside the base (4).
3. The hot pressing and sintering mold for boron carbide shaped core blocks according to claim 2, characterized in that: The air blowing assembly (7) includes an air compressor (71), which is fixedly installed on the workbench (1). An air inlet pipe (72) is fixedly connected to the upper side of the air compressor (71). The air inlet pipe (72) is fixedly connected to the front side of the heating furnace (31). An exhaust assembly is provided inside the mold body (5), and a limit assembly is provided on the outer side of the mold body (5).
4. The hot pressing and sintering mold for boron carbide shaped core blocks according to claim 3, characterized in that: The exhaust assembly includes a spring (74), which is fixedly connected to the inside of the heating furnace (31). A plug (75) is fixedly connected to the outside of the spring (74), and a channel (73) is provided inside the heating furnace (31).
5. The hot pressing and sintering mold for boron carbide shaped core blocks according to claim 3, characterized in that: The limiting component includes a rotating seat (77), which is fixedly connected to the outside of the mold body (5), and a limiting block (76) is rotatably connected inside the rotating seat (77).
6. The hot pressing and sintering mold for boron carbide shaped core blocks according to claim 1, characterized in that: The mold body (5) has a mold cavity (8) inside.
7. The hot pressing and sintering mold for boron carbide shaped core blocks according to claim 2, characterized in that: The spindle (63) is slidably connected inside the limiting hole (64).
8. The hot pressing and sintering mold for boron carbide shaped core blocks according to claim 2, characterized in that: The graphite perforated mold plug (62) is slidably connected inside the heating furnace (31).