CN205572660U - Be used for high temperature gas cooled to pile fashioned mould of boron carnbide pellet unburned bricks for control rod - Google Patents
Be used for high temperature gas cooled to pile fashioned mould of boron carnbide pellet unburned bricks for control rod Download PDFInfo
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- CN205572660U CN205572660U CN201620415220.5U CN201620415220U CN205572660U CN 205572660 U CN205572660 U CN 205572660U CN 201620415220 U CN201620415220 U CN 201620415220U CN 205572660 U CN205572660 U CN 205572660U
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Abstract
The utility model discloses a be used for high temperature gas cooled to pile fashioned mould of boron carnbide pellet unburned bricks for control rod, including the boss pressure head, in the inside cavity of boss pressure head and coordinate the one core bar, be equipped with at boss pressure head outside cover and push down the head, the bed die is equipped with at pressure head overcoat down, the space between core bar and the bed die forms the wall thickness of boron carnbide pellet unburned bricks, the boss pressure head and the raised head face of pressure head cooperation formation boron carnbide pellet unburned bricks down, still include a last pressure head that compresses from the space between bed die and the core bar to the boss pressure head. Adopt the utility model discloses a mould formability goes out to take the boron carnbide annular pellet of 6 bosss, and during the shaping, the green density of pellet reaches 55%, the sample surface flawless when the forming pressure of boron carnbide powder at 100MPa under, and the boss does not have the phenomenon of rupture, has prepared out to satisfy the boron carnbide unburned bricks that the pellet preparation required, has solved high temperature gas cooled and has piled the difficult problem of boron carnbide pellet shaping for the control rod.
Description
Technical field
This utility model relates to the ceramic forming material technology of nuclear reactor, is specifically related to a kind of mould for HTGR control rod boron carbide core green compact molding.
Background technology
HTGR Nuclear Power Plant uses boron carbide core to make control rod neutron absorber material, and the boron carbide core chemical composition prepared with pressureless sintering is entirely capable of meeting the pure requirement of core level, and pellet density can reach more than 80%T.D., can be with dead size molding.In the non-pressure sintering technology of boron carbide core, the molding of boron carbide core is the key factor having influence on boron carbide core end product quality with yield rate.HTGR control rod boron carbide core outer rod termination is complicated by pellet structure, pellet main body is a cylinder, external diameter 107mm, internal diameter is 85mm, highly 80-160mm, there are 6 boss on top, this structure boron carbide core molding is relatively difficult, find when early stage boron carbide core molded test, projection section is easy fracture when molding, and the density of projection section is difficult to keep consistent with cylinder main part, it is easily formed crackle during green compact molding, therefore molding difficulty is big, report currently without the documents and materials seeing this type of mould through literature survey, not similar mould structure design can be used for reference.The boron carbide green compact of band boss cannot be molded with existing mold.
Utility model content
The purpose of this utility model is to provide a kind of mould for HTGR control rod boron carbide core green compact molding, solves the problem that existing mold cannot mold the boron carbide green compact of band boss.
This utility model is achieved through the following technical solutions:
A kind of mould for HTGR control rod boron carbide core green compact molding, including boss pressure head, in boss pressure head inner hollow and coordinate a core bar, at boss pressure head outer sheath equipped with push-down head, former it is set with outside push-down head, space between core bar and former forms the wall thickness of boron carbide core green compact, and boss pressure head and push-down head cooperatively form the raised head face of boron carbide core green compact；Also include a seaming chuck compressed from the space between former and core bar to boss pressure head.This utility model uses split type mould, former, boss pressure head, push-down head, and core bar is respectively as an independent face of boron carbide core green compact, by the shape cooperatively forming boron carbide core green compact in four faces, for in prior art, former is generally overall structure, good dismounting performance makes the product after punching press can be with facet form removal, eventually form a complete briquet, use mould of the present utility model plastic go out boron carbide Annular pellet with 6 boss, when the boron carbide powder briquetting pressure compacted under at 100MPa, the green density of pellet reaches 55%, sample surfaces flawless, boss is without phenomenon of rupture, prepare and met the boron carbide green compact that pellet preparation requires, solve HTGR control rod boron carbide core difficult forming problem.
Described seaming chuck is provided with a stop.By the setting of stop, the briquet of axially different length can be limited, be conducive to the end face keeping briquet complete.
Be tubular structure at described boss pressure head and push-down head, and be provided with in the bottom of tubular one along the ear dish that extends radially outwardly of tubular, between two ear dishes, be stacked with ear plate mat block.By being all provided with being set to ear disk-like structure by boss pressure head, push-down head and former, such that it is able to be easy to picking and placeing and coordinating of mould, it is simple to operation, by being stacked with ear plate mat block between the ear dish of boss pressure head and push-down head, the height of boss can be adjusted.
Former cushion block it is provided with between the ear dish of described former and push-down head.Further, the former cushion block arranged between the ear dish of former and push-down head for taking out cushion block when two-sided compacting, to reserving displacement between push-down head and former, improves pellet green density uniformity.
This utility model compared with prior art, has such advantages as and beneficial effect:
null1、A kind of mould for HTGR control rod boron carbide core green compact molding of this utility model，Use split type mould，Former、Boss pressure head、Push-down head、And core bar is respectively as an independent face of boron carbide core green compact，By the shape cooperatively forming boron carbide core green compact in four faces，For in prior art, former is generally overall structure，Good dismounting performance makes the product after punching press can be with facet form removal，Eventually form a complete briquet，Use mould of the present utility model plastic go out boron carbide Annular pellet with 6 boss，When the boron carbide powder briquetting pressure compacted under at 100MPa，The green density of pellet reaches 55%，Sample surfaces flawless，Boss is without phenomenon of rupture，Prepare and met the boron carbide green compact that pellet preparation requires，Solve HTGR control rod boron carbide core difficult forming problem；
2, a kind of mould for HTGR control rod boron carbide core green compact molding of this utility model, by being all provided with being set to ear disk-like structure by boss pressure head, push-down head and former, such that it is able to be easy to picking and placeing and coordinating of mould, convenient to operate, by being stacked with ear plate mat block between the ear dish of boss pressure head and push-down head, the height of boss can be adjusted；
3, a kind of mould for HTGR control rod boron carbide core green compact molding of this utility model, the former cushion block arranged between the ear dish of former and push-down head for taking out cushion block when two-sided compacting, to reserving displacement between push-down head and former, improve pellet green density uniformity.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by this utility model embodiment, constitutes the part of the application, is not intended that the restriction to this utility model embodiment.In the accompanying drawings:
Fig. 1 is partly to cut open schematic diagram after the cooperation of this utility model mould；
Fig. 2 is the top view of boss pressure head in Fig. 1；
Fig. 3 is the top view of push-down head in Fig. 1；
Fig. 4 is the top view of former in Fig. 1.
The parts title of labelling and correspondence in accompanying drawing:
1-stop, 2-former, 3-seaming chuck, 4-core bar, 5-boron carbide core green compact, 6-push-down head, 7-former cushion block, 8-ear plate mat block, 9-boss pressure head.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, exemplary embodiment of the present utility model and explanation thereof are only used for explaining this utility model, are not intended as restriction of the present utility model.
Embodiment
As shown in Figures 1 to 4, a kind of mould for HTGR control rod boron carbide core green compact 5 molding of this utility model, including boss pressure head 9, in boss pressure head 9 inner hollow and coordinate a core bar 4, at boss pressure head 9 outer sheath equipped with push-down head 6, boss pressure head 9 and push-down head 6 are tubular structure, and be provided with in the bottom of tubular one along the ear dish that extends radially outwardly of tubular, between two ear dishes, be stacked with ear plate mat block 8；Outside push-down head 6, it is set with former 2, between the ear dish of former 2 and push-down head 6, is provided with former cushion block 7；Space between core bar 4 and former 2 forms the wall thickness of boron carbide core green compact 5, and boss pressure head 9 and push-down head 6 cooperatively form the raised head face of boron carbide core green compact 5；Also include a seaming chuck 3 compressed to boss pressure head 9 from the space between former 2 and core bar 4, seaming chuck 3 is provided with a stop 1.When carrying out die-filling, the bossing of boss pressure head 9 is put in the groove of push-down head 6, ear plate mat block 8 on pad between boss pressure head 9 and push-down head 6, the height of green compact boss is adjusted with ear plate mat block 8, core bar 4 is placed in boss pressure head 9 and push-down head 6 center again, former 2 is enclosed within boss pressure head 9, former cushion block 7 is put between former 2 and push-down head 6, for taking out former cushion block 7 when two-sided compacting, to reserving displacement between push-down head 6 and former 2, improve pellet green density uniformity；After installing former 2, powder is loaded in former 2, powder is paved, jolt ramming, then install pressure head 3, at seaming chuck 3 outer cover upper limit device 1, it is shaped with press compacting seaming chuck, after pressing one-time, remove the former cushion block 7 between push-down head 6 and former 2, again suppress, ear plate mat block 8 between boss pressure head 9 and push-down head 6 is changed into shim liner again suppress, for improving density and the intensity of projection section.During the demoulding, mould is inverted, supports push-down head ear dish with demoulding bracing frame, making mould leave work top, then place support bar on former 2 ear dish, press pressure is delivered on former 2 by support bar, make former 2 depart from green compact 5, then green compact 5 are taken off from core bar 4 with seaming chuck 3.When the boron carbide powder briquetting pressure compacted under at 100MPa, the green density of pellet reaches 55%, and sample surfaces flawless, boss is without phenomenon of rupture.
Above-described detailed description of the invention; the purpose of this utility model, technical scheme and beneficial effect are further described; it is it should be understood that; the foregoing is only detailed description of the invention of the present utility model; it is not used to limit protection domain of the present utility model; all within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. done, within should be included in protection domain of the present utility model.
Claims (4)
1. one kind is used for the HTGR control rod mould of boron carbide core green compact (5) molding, it is characterized in that: include boss pressure head (9), in boss pressure head (9) inner hollow and coordinate a core bar (4), at boss pressure head (9) outer sheath equipped with push-down head (6), former (2) it is set with outside push-down head (6), space between core bar (4) and former (2) forms the wall thickness of boron carbide core green compact (5), and boss pressure head (9) and push-down head (6) cooperatively form the raised head face of boron carbide core green compact (5)；Also include a seaming chuck (3) compressed from the space between former (2) and core bar (4) to boss pressure head (9).
One the most according to claim 1 is for the mould of HTGR control rod boron carbide core green compact (5) molding, it is characterised in that: on described seaming chuck (3), it is provided with a stop (1).
One the most according to claim 1 is for the mould of HTGR control rod boron carbide core green compact (5) molding, it is characterized in that: be tubular structure at described boss pressure head (9) and push-down head (6), and be provided with in the bottom of tubular one along the ear dish that extends radially outwardly of tubular, between two ear dishes, be stacked with ear plate mat block (8).
One the most according to claim 3 is for the mould of HTGR control rod boron carbide core green compact (5) molding, it is characterised in that: between described former (2) and the ear dish of push-down head (6), it is provided with former cushion block (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620415220.5U CN205572660U (en) | 2016-05-10 | 2016-05-10 | Be used for high temperature gas cooled to pile fashioned mould of boron carnbide pellet unburned bricks for control rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620415220.5U CN205572660U (en) | 2016-05-10 | 2016-05-10 | Be used for high temperature gas cooled to pile fashioned mould of boron carnbide pellet unburned bricks for control rod |
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| CN205572660U true CN205572660U (en) | 2016-09-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106738210A (en) * | 2016-12-26 | 2017-05-31 | 同方威视技术股份有限公司 | A kind of mould and the method using Making mold GOS scintillating ceramics |
| CN109968731A (en) * | 2019-04-10 | 2019-07-05 | 河南黄河旋风股份有限公司 | Powder pressing at tubular products mold and tubular products manufacturing method |
-
2016
- 2016-05-10 CN CN201620415220.5U patent/CN205572660U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106738210A (en) * | 2016-12-26 | 2017-05-31 | 同方威视技术股份有限公司 | A kind of mould and the method using Making mold GOS scintillating ceramics |
| CN109968731A (en) * | 2019-04-10 | 2019-07-05 | 河南黄河旋风股份有限公司 | Powder pressing at tubular products mold and tubular products manufacturing method |
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