JPH11322447A - Production of ceramic insert element assembly in insert appliance - Google Patents
Production of ceramic insert element assembly in insert applianceInfo
- Publication number
- JPH11322447A JPH11322447A JP10137291A JP13729198A JPH11322447A JP H11322447 A JPH11322447 A JP H11322447A JP 10137291 A JP10137291 A JP 10137291A JP 13729198 A JP13729198 A JP 13729198A JP H11322447 A JPH11322447 A JP H11322447A
- Authority
- JP
- Japan
- Prior art keywords
- insert element
- element body
- molding
- ceramic insert
- ceramic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、各種構成物（ビ
ル、高速道路、橋桁、地下構造物、電柱などのコンクリ
ート構造物、岸壁、石壁などの石材構造物、その他各種
建材からなる構造物など）に埋設して使用されるインサ
ート器具におけるセラミックスインサート要素体の製造
方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various structures (buildings, highways, bridge girders, underground structures, concrete structures such as telephone poles, stone structures such as quays and stone walls, and other structures including various building materials). The present invention relates to a method for producing a ceramic insert element body in an insert tool embedded and used in (1).
【０００２】[0002]
【従来の技術】この種のインサート器具としては、一般
に、雌型部材として用いるインサート要素体と、雄型部
材として用いるボルトとからなり、インサート要素体を
予めコンクリート構造物に埋設しておき、このインサー
ト要素体のねじ穴にボルトを螺合して結合する構成のも
のが広く知られている。2. Description of the Related Art An insert tool of this type generally comprises an insert element used as a female member and a bolt used as a male member. The insert element is embedded in a concrete structure in advance. 2. Description of the Related Art There is widely known a configuration in which a bolt is screwed into a screw hole of an insert element body to be connected thereto.
【０００３】[0003]
【発明が解決しようとする課題】従来のインサート器具
においては、インサート要素体が鉄などの金属製である
ために、コンクリート内で短時間のうちに腐食し、イン
サート要素体自身はもちろん、コンクリートまでも劣化
させてしまうという課題があった。又、インサート要素
体に耐腐食材料であるステンレスを用いた場合でも、電
食、孔食等が原因と考えられるステンレス特有の腐食が
発生した。In a conventional insert device, since the insert element body is made of a metal such as iron, it is corroded in concrete in a short time, and not only the insert element itself but also concrete. However, there is a problem that it also deteriorates. Further, even when stainless steel, which is a corrosion-resistant material, was used for the insert element body, corrosion peculiar to stainless steel, which is considered to be caused by electrolytic corrosion, pitting corrosion, etc., occurred.
【０００４】そこで、耐腐食性を良好にするために、近
年、セラミックス製のインサート要素体を使用するよう
になった。その一例を図４に示す。図４は、特開平１０
−４６６７６号で本出願人等が提案したものであり、１
は外周面を曲面状とした樽形状に形成されたセラミック
製のインサート要素体であり、その中心には雌ねじ部１
ａが設けられ、コンクリートなどの構成物２に埋設され
ている。１ｂはインサート要素体１の最大径部１ｃから
構成物２の反表面側の外周に少なくとも１個所設けられ
た切欠部からなる回り止めであり、インサート要素体１
が構成物２に対して回転しないように設けたものであ
る。又、インサート要素体１における構成物２の表面側
端部の径は反表面側端部の径より小さくなっている。
又、最大径部１ｃは両端部の中間点より反表面側に変位
している。３は構成物２におけるその表面とインサート
要素体１との間にインサート要素体１と同軸状に埋設さ
れた筒体であり、内周に固定具挿通穴３ａを有する。４
は被固定部材５及び固定具挿通穴３ａに挿通され、その
雄ねじ部４ａがインサート要素体１の雌ねじ部１ａに螺
着された固定具（ボルト）であり、このようにして被固
定部材５は構成物２に取り付けられる。Therefore, in order to improve the corrosion resistance, ceramic insert elements have recently been used. An example is shown in FIG. FIG.
No. 46676, which was proposed by the present applicant.
Is a ceramic insert element formed in a barrel shape having a curved outer peripheral surface, and a female screw portion 1 is provided at the center thereof.
a is provided and buried in a component 2 such as concrete. Reference numeral 1b denotes a detent formed of at least one cutout provided on the outer periphery of the component 2 from the largest diameter portion 1c of the insert element body 1 on the side opposite to the surface of the component 2.
Are provided so as not to rotate with respect to the component 2. Also, the diameter of the surface side end of the component 2 in the insert element body 1 is smaller than the diameter of the opposite side end.
In addition, the maximum diameter portion 1c is displaced from the intermediate point between both ends to the opposite surface side. Reference numeral 3 denotes a cylindrical body buried coaxially with the insert element body 1 between the surface of the component 2 and the insert element body 1, and has a fixture insertion hole 3a on the inner periphery. 4
Is a fixing tool (bolt) which is inserted into the fixed member 5 and the fixing tool insertion hole 3a, and whose male screw portion 4a is screwed to the female screw portion 1a of the insert element body 1. In this way, the fixing member 5 Attached to component 2.
【０００５】上記構成のインサート器具においては、イ
ンサート要素体１をセラミックスにより形成したことに
より耐食性を向上することができる。なお、筒体３もセ
ラミックスや樹脂などにより形成するが、固定具挿通穴
３ａを他の手段により形成すれば筒体３は必ずしも必要
でない。構成物２としては、ビル、高速道路、橋桁、地
下構造物、電柱などのコンクリート構造物、岸壁、石壁
などの石材構造物、その他の各種建材からなる構造物な
どが該当する。又、インサート器具の施工箇所は、構成
物２の床面、天井、側壁、下面、上面、側面などであ
る。[0005] In the insert device having the above structure, the corrosion resistance can be improved by forming the insert element body 1 from ceramics. The cylindrical body 3 is also formed of ceramics or resin, but the cylindrical body 3 is not necessarily required if the fixture insertion hole 3a is formed by other means. The component 2 includes a building, a highway, a bridge girder, an underground structure, a concrete structure such as a telephone pole, a stone structure such as a quay wall, a stone wall, and a structure including various other building materials. The places where the insert device is installed are the floor surface, ceiling, side walls, lower surface, upper surface, and side surfaces of the component 2.
【０００６】しかしながら、上記したインサート器具に
おいては、セラミックスインサート要素体１は、材料自
身が非常に硬く、焼結後雌ねじ部１ａの加工にダイヤモ
ンドを使用する必要があり、コストが非常に高くなっ
た。又、最初の成形工程においてねじ切りやねじ型の挿
入により雌ねじ部１ａを形成した場合には、加工時の残
留応力により焼結後ねじ山が脱落したり、反応収縮が適
合しなかったりして歩留が低下した。However, in the insert device described above, the material of the ceramic insert element body 1 is very hard, and it is necessary to use diamond for processing the internal thread portion 1a after sintering, resulting in a very high cost. . Further, when the female screw portion 1a is formed by threading or inserting a screw mold in the first forming step, the thread may drop off after sintering due to residual stress during processing, or the reaction shrinkage may not be suitable. Retention decreased.
【０００７】この発明は上記のような課題を解決するた
めに成されたものであり、セラミックスインサート要素
体を安価にかつその雌ねじ部を強固に精度良く製造する
ことができるインサート器具におけるセラミックスイン
サート要素体の製造方法を得ることを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a ceramic insert element in an insert tool which can manufacture a ceramic insert element inexpensively and firmly and accurately with a female screw portion thereof. The aim is to obtain a method for producing a body.
【０００８】[0008]
【課題を解決するための手段】この発明の請求項１に係
るインサート器具におけるセラミックスインサート要素
体の製造方法は、主成分となる酸化アルミニウムに焼結
を助ける副成分と水を添加して原料スラリーを形成し、
この原料スラリーに有機バインダーと分散剤を添加した
ものをスプレードライヤーで噴霧造粒し、得られた顆粒
を静水圧成形機により成形型を用いて所定の形状に成形
した後焼成するもので、上記静水圧成形機による成形圧
力の範囲を３００〜１０００ｋｇ／ｃｍ2とし、上記成
形型におけるセラミックスインサート要素体の雌ねじ部
を成形するねじ部をピッカース硬度ＨＶ６００以上の金
属材料により形成するとともに、その表面仕上げ粗さＲ
maxを０．３μｍ以下に加工したものである。According to a first aspect of the present invention, there is provided a method for manufacturing a ceramic insert element in an insert tool, comprising adding a subcomponent which assists sintering and water to aluminum oxide as a main component to form a raw material slurry. To form
The raw material slurry obtained by adding an organic binder and a dispersant is spray-granulated with a spray dryer, and the obtained granules are molded into a predetermined shape using a molding die by a hydrostatic molding machine and then fired. The range of the molding pressure by the hydrostatic molding machine is 300 to 1000 kg / cm 2, and the screw portion for forming the female screw portion of the ceramic insert element body in the above-mentioned mold is formed of a metal material having a Pickers hardness of HV600 or more and its surface finish Roughness R
This is one in which max is processed to 0.3 μm or less.
【０００９】又、請求項２に係るインサート器具におけ
るセラミックスインサート要素体の製造方法は、上記成
形型のねじ部が固定具挿入側端部に不完全ねじ部を１〜
３山有するとともに、この不完全ねじ部の切り込み角度
を８０〜９５度としたものである。In a second aspect of the present invention, there is provided a method of manufacturing a ceramic insert element body for an insert device, wherein the screw portion of the mold has an incomplete screw portion at an end on the fixture insertion side.
In addition to having three ridges, the cut angle of the incomplete thread is 80 to 95 degrees.
【００１０】請求項３に係るインサート器具におけるセ
ラミックスインサート要素体の製造方法は、上記成形型
のねじ部の山部の先端の形状をＲ形状とするとともに、
このＲ形状の径を固定具の雄ねじ部の径の１〜３％とし
たものである。[0010] According to a third aspect of the present invention, there is provided a method for manufacturing a ceramic insert element body in an insert device, wherein the shape of the tip of the crest of the screw portion of the forming die is rounded.
The diameter of the R shape is set to be 1 to 3% of the diameter of the male screw portion of the fixture.
【００１１】[0011]
【発明の実施の形態】以下、この発明の実施の形態を図
面とともに説明する。まず、主成分となる酸化アルミニ
ウム（Ａｌ2Ｏ3）に焼結を助ける副成分を添加し、これ
に純水を加えボールミルにて１０時間混合粉砕を行う。
副成分としては、ＭｇＯ、ＣａＯ、ＳｉＯ2などを合計
３〜６重量％添加する。上記のようにして得られた原料
スラリーにポリビニールアルコールなどの有機バインダ
ーと分散剤としてのポリカルボン酸アンモニウム塩を添
加し、スプレードライヤーで１５０℃の乾燥温度で噴霧
造粒し、得られた顆粒を静水圧成形機（通称ＣＩＰ）に
より成形型を用いて５００Ｋｇ／ｃｍ2の圧力で成形す
る。Embodiments of the present invention will be described below with reference to the drawings. First, an auxiliary component which aids sintering is added to aluminum oxide (Al 2 O 3 ) as a main component, and pure water is added thereto, followed by mixing and grinding for 10 hours by a ball mill.
The auxiliary component, MgO, CaO, are added and SiO 2 total 3-6% by weight. An organic binder such as polyvinyl alcohol and a polycarboxylate ammonium salt as a dispersant are added to the raw material slurry obtained as described above, and the resulting granules are spray-granulated at a drying temperature of 150 ° C. with a spray drier. Is molded at a pressure of 500 kg / cm 2 using a molding die by a hydrostatic molding machine (commonly called CIP).
【００１２】図１は静水圧成形機の要部断面図を示し、
６は筒状の成型ゴム型、７，８は金属材料からなる上蓋
及び下蓋であり、下蓋８にはねじ部８ａが立設され、こ
れらにより成形型が形成される。成形型は圧力容器９内
に加圧ゴム型１０を介して挿入される。成形に際しては
上記のように形成された顆粒１１を成形ゴム型６、上蓋
７及び下蓋８からなる成形型内に充填し、この成形型を
加圧ゴム型１０内に挿入する。この状態で上蓋７及び下
蓋８に上下から圧力を加えるとともに、圧力容器９に設
けた圧力口９ａから静水圧を加圧ゴム型１０を介して成
形型に加えると、静水圧は成形型に均等に加えられる。FIG. 1 is a sectional view of a main part of a hydrostatic molding machine.
Reference numeral 6 denotes a cylindrical molded rubber mold, and reference numerals 7 and 8 denote an upper lid and a lower lid made of a metal material. The lower lid 8 is provided with a threaded portion 8a, which forms a molding die. The molding die is inserted into the pressure vessel 9 via the pressurized rubber mold 10. At the time of molding, the granules 11 formed as described above are filled into a molding die composed of a molding rubber mold 6, an upper lid 7 and a lower lid 8, and this molding die is inserted into a pressure rubber mold 10. In this state, pressure is applied to the upper lid 7 and the lower lid 8 from above and below, and a hydrostatic pressure is applied to the mold through a pressure port 9a provided in the pressure vessel 9 via a pressurized rubber mold 10. Added evenly.
【００１３】成形されたインサート要素体は成形型から
取り出し、バッチタイプのガス炉内で１６００℃の温度
により２時間焼成し、１００℃／ｈの降温速度で冷却
し、セラミックスインサート要素体が完成する。The molded insert element is taken out of the mold, fired in a batch type gas furnace at a temperature of 1600 ° C. for 2 hours, and cooled at a rate of 100 ° C./h to complete a ceramic insert element. .
【００１４】上記したように、噴霧造粒後の原料粉体の
成形を静水圧成形機により行ったのは、他の成形方法、
例えば乾式金型成形では圧力の不均一性が大きく、焼成
収縮後セラミックスインサート要素体の主に雌ねじ部の
径にばらつきが生じ、規格から外れてしまうからであ
る。又、鋳込成形や射出成形ではバインダーの含有量を
多くしなければならず、焼成収縮後のばらつきが大きく
なり、やはり雌ねじ部が規格範囲外のものとなってしま
うからである。この点、静水圧成形では静水圧が成形型
に均等に加わり、またバインダー量も少なくてよいの
で、インサート要素体の雌ねじ部の径を規格範囲内とす
ることができる。又、静水圧成形を５００ｋｇ／ｃｍ2
の圧力で行ったが、３００〜１０００ｋｇ／ｃｍ2の範
囲内であればよい。３００ｋｇ／ｃｍ2以下では成形強
度が不足して欠け、クラックが発生し、１０００ｋｇ／
ｃｍ2以上では圧力解除までの時間が長く、生産性が低
下するとともに、離型性が悪く、縦割れが発生し易いか
らである。As described above, the molding of the raw material powder after the spray granulation was performed by the isostatic pressing machine using another molding method.
This is because, for example, in dry mold molding, pressure non-uniformity is large, and after firing and shrinking, the diameter of mainly the female screw portion of the ceramic insert element body varies, which deviates from the standard. In addition, in casting or injection molding, the content of the binder must be increased, the dispersion after firing shrinkage becomes large, and the female screw portion also falls outside the standard range. In this regard, in the hydrostatic molding, since the hydrostatic pressure is evenly applied to the molding die and the amount of the binder may be small, the diameter of the female screw portion of the insert element body can be within the standard range. In addition, hydrostatic molding is performed at 500 kg / cm 2
, But may be in the range of 300 to 1000 kg / cm 2 . If it is less than 300 kg / cm 2 , the molding strength is insufficient and chipping occurs, cracks occur, and 1000 kg / cm 2
If the pressure is not less than 2 cm 2 , the time until the pressure is released is long, the productivity is reduced, the releasability is poor, and vertical cracks are easily generated.
【００１５】成形型のうち、ねじ部８ａはセラミックス
に負けない硬質の金属製が望ましく、例えばピッカース
硬度Ｈｖが６００以上のＳＫＳ材により形成する。又、
ねじ部８ａの表面は成形時や脱型時の摩擦をできるだけ
小さくする必要があり、研摩処理を行って表面粗さＲ
max０．３μｍ以下にする必要がある。これらの範囲外
であると、型の摩耗等により脱型が難しくなったり、脱
型時にねじ山が脱落したりした。In the molding die, the screw portion 8a is desirably made of a hard metal which is not defeated by ceramics, and is formed of, for example, an SKS material having a Pickers hardness Hv of 600 or more. or,
The surface of the threaded portion 8a needs to have as little friction as possible during molding and demolding.
It is necessary to make max 0.3 μm or less. Outside these ranges, the mold was difficult to remove due to abrasion of the mold and the like, and the threads fell off during the removal.
【００１６】又、図２は図１のＡ部拡大図、即ちねじ部
８ａにおける固定具４の挿入側端部に該当する部分の断
面図を示し、図示のように該端部には不完全ねじ部を１
〜３山設ける。不完全ねじ部は、通常のねじ部に対して
切り込み角度とねじ山高さが完全ねじ部と異なるもので
あり、例えばその切り込み（ねじ切りバイト）角度を８
０〜９５度とする（完全ねじ部の切り込み角度は６０度
である。）。これは、固定具４の挿入開始側の起点にな
るねじ山の立ち上がり個所が通常のねじ形状のままであ
ると、成形密度が非常に低下してしまい、強度が低くな
り、ねじ山が欠け易くなるからである。又、完全ねじ部
の山形の先端をＲ形状とし、その径の大きさは固定具４
の雄ねじ部４ａの径の１〜３％とする。これは、プレス
型で成形する際にねじ山部に適当なＲを持たせないと、
脱型時のせん断力により角部にクラックが生じてねじ山
部に脱落が発生し、または残留応力により焼成中にクラ
ックが発生するからである。FIG. 2 is an enlarged view of a portion A in FIG. 1, that is, a cross-sectional view of a portion corresponding to the insertion side end of the fixing member 4 in the screw portion 8a. Screw part 1
There will be three peaks. An incompletely threaded portion is different from a completely threaded portion in a cutting angle and a thread height with respect to a normal threaded portion.
0 to 95 degrees (the cut angle of the complete thread is 60 degrees). This is because if the starting point of the screw thread, which is the starting point on the insertion start side of the fixing tool 4, remains in the normal screw shape, the molding density is extremely reduced, the strength is reduced, and the screw thread is easily chipped. Because it becomes. Also, the tip of the angle of the completely threaded portion is rounded, and the size of the diameter is
1 to 3% of the diameter of the male screw portion 4a. This is because if you do not give the thread part an appropriate R when molding with a press die,
This is because cracks are generated at the corners due to the shearing force at the time of releasing the mold, falling off occurs at the thread, or cracks are generated during the firing due to residual stress.
【００１７】上記のように形成されたセラミックスイン
サート要素体１２は図３に示すように従来同様に構成物
２中に筒体３を介して埋設され、被固定部材５及び固定
具挿通穴３ａを挿通した固定具４の雄ねじ部４ａをセラ
ミックスインサート要素体１２の中心に形成された雌ね
じ部１２ａに螺着し、被固定部材５を構成物２に固定す
る。As shown in FIG. 3, the ceramic insert element body 12 formed as described above is buried in the component 2 via the cylindrical body 3 as in the prior art, and the fixed member 5 and the fixing tool insertion hole 3a are formed. The male screw portion 4a of the inserted fixture 4 is screwed to the female screw portion 12a formed at the center of the ceramic insert element body 12, and the fixed member 5 is fixed to the component 2.
【００１８】上記実施形態においては、酸化アルミニウ
ムを用いてセラミックスインサート要素体１２を形成し
ており、耐食性が良好で、長期間信頼性が高くなる。
又、耐火性がコンクリート以上に高く、温度変化時の膨
張収縮が少なく、コンクリートに近くなる。さらに、最
も形成が困難な雌ねじ部１２ａの形成をプレス工程によ
る静水圧成形により形成しており、ダイヤモンド加工が
不要となって経済性を高めることができる。しかも、プ
レス工程のみで完全形状あるいは完全形状に近い成形体
を得ることができ、切削屑の発生を低減することができ
る。又、静水圧成形では、静水圧が成形型に均等に加わ
るとともに、バインダー量も少なくてよいので、インサ
ート要素体１２の雌ねじ部１２ａの径にばらつきを生じ
ず、規格範囲内にすることができる。又、成形圧力を３
００〜１０００ｋｇ／ｃｍ2の範囲内としたので、成形
強度の不足による欠け、クラックは生じず、生産性も向
上する。In the above-described embodiment, the ceramic insert element body 12 is formed using aluminum oxide, so that the corrosion resistance is good and the reliability is high for a long time.
In addition, the fire resistance is higher than that of concrete, the expansion and contraction at the time of temperature change is small, and it is close to concrete. Furthermore, since the formation of the female screw portion 12a, which is the most difficult to form, is formed by hydrostatic pressing in a pressing step, diamond processing becomes unnecessary, and the economic efficiency can be improved. In addition, a compact having a perfect shape or a shape close to a perfect shape can be obtained only by the pressing step, and the generation of cutting chips can be reduced. Further, in the hydrostatic molding, since the hydrostatic pressure is uniformly applied to the molding die and the amount of the binder may be small, the diameter of the female screw portion 12a of the insert element body 12 does not vary and can be within the standard range. . Also, if the molding pressure is 3
Since it is in the range of 00 to 1000 kg / cm 2 , chipping and cracking due to insufficient molding strength do not occur, and productivity is improved.
【００１９】又、成形型のねじ部８ａをピッカース硬度
Ｈｖが６００以上の金属製とし、その表面粗さＲmaxを
０．３μｍ以下としたので、成形時や脱型時の摩擦や摩
耗が小さくなり、脱型困難や脱形時のねじ部８ａのねじ
山の脱落を防止することができる。又、ねじ部８ａの固
定具４挿入側端部に不完全ねじ部を１〜３山設け、その
切り込み角度を８０〜９５度としたので、この部分の成
形密度の低下による強度不足によりインサート要素体１
２のねじ部１２ａに欠損が生じるのを防止することがで
きる。さらに、成形型のねじ部８ａのうちの完全ねじ部
の先端をＲ形状とし、その径を固定具４の雄ねじ部４ａ
の径の１〜３％としたので、脱型時や焼成時のクラック
の発生を防止することができる。[0019] Also, the mold of the threaded portion 8a and Vickers hardness Hv of 600 or more metal, since the surface roughness R max and 0.3μm or less, less friction and wear during molding and during demolding Therefore, it is possible to prevent the removal of the screw thread of the screw portion 8a from being difficult to remove or to remove the screw thread at the time of removal. In addition, since one to three incomplete thread portions are provided at the end of the fixing portion 4 of the screw portion 8a on the insertion side, and the cut angle is set to 80 to 95 degrees, the strength of the portion is reduced due to a decrease in molding density. Body 1
The occurrence of loss in the second screw portion 12a can be prevented. Further, the tip of the complete thread portion of the thread portion 8a of the molding die is formed into an R shape, and the diameter thereof is adjusted to the external thread portion 4a of the fixture 4.
Since the diameter is set to 1 to 3% of the diameter, cracks can be prevented from occurring during demolding and firing.
【００２０】なお、従来例で述べたように、筒体３は必
ずしも必要でなく、構成物２の種類や施工個所も従来と
同様である。As described in the conventional example, the cylindrical body 3 is not always necessary, and the type of the component 2 and the construction location are the same as in the conventional case.
【００２１】[0021]
【発明の効果】以上のようにこの発明の請求項１によれ
ば、酸化アルミニウムを主成分としてセラミックスイン
サート要素体を形成しており、耐食性を向上することが
できる。又、インサート要素体を静水圧成形により形成
しており、雌ねじ部の形成にダイヤモンド加工が不要と
なり、安価に製造することができる。又、静水圧成形で
は成形型に均等に圧力が加わるので、インサート要素体
の特に雌ねじ部の径を正確に形成することができる。
又、成形圧力を３００〜１０００ｋｇ／ｃｍ2としてお
り、成形強度の不足による欠け、クラックは生じず、ま
た生産性も向上することができる。又、成形型のねじ部
をピッカース硬度が６００以上の金属製とし、その表面
粗さＲmaxを０．３μｍ以下としたので、成形時や脱型
時の摩擦や摩耗を小さくすることができ、脱型困難や脱
型時のねじ部のねじ山の脱落を防止することができる。
又、請求項２によれば、成形型のねじ部の固定具挿入側
端部に不完全ねじ部を１〜３山設け、その切り込み角度
を８０〜９５度としたので、インサート要素体のこの部
分の成形密度が増大し、成形密度の低下による強度不足
によりインサート要素体の雌ねじ部に欠損が生じるのを
防止することができる。さらに、請求項３によれば、成
形型のねじ部の山部の先端の形状をＲ形状とするととも
に、このＲ形状の径を固定具の雄ねじ部の径の１〜３％
としており、脱型時や焼成時のクラック発生を防止する
ことができる。As described above, according to the first aspect of the present invention, since the ceramic insert element body is formed mainly of aluminum oxide, the corrosion resistance can be improved. In addition, since the insert element body is formed by hydrostatic molding, the formation of the female screw portion does not require diamond processing, and can be manufactured at low cost. In addition, in the hydrostatic molding, since the pressure is evenly applied to the molding die, the diameter of the insert element body, particularly, the diameter of the female screw portion can be accurately formed.
Further, the molding pressure is set to 300 to 1000 kg / cm 2, and chipping and cracking due to insufficient molding strength do not occur, and productivity can be improved. Further, the threaded portion of the mold and Vickers hardness are made of 600 or more metals, since the surface roughness R max and 0.3μm or less, it is possible to reduce friction and wear during molding and during demolding, It is possible to prevent the removal of the thread of the screw portion from being difficult to remove or the removal of the screw thread at the time of removal.
According to the second aspect of the present invention, one to three incomplete screw portions are provided at the fixing tool insertion side end of the screw portion of the molding die, and the cut angle is set to 80 to 95 degrees. It is possible to prevent the formation density of the portion from increasing and to prevent the internal thread portion of the insert element body from being broken due to insufficient strength due to the reduction in the formation density. Further, according to the third aspect, the shape of the tip of the crest of the screw portion of the molding die is made into an R shape, and the diameter of this R shape is 1 to 3% of the diameter of the male screw portion of the fixture.
Therefore, it is possible to prevent the occurrence of cracks during demolding and firing.
【図１】この発明による静水圧成形機の要部断面図であ
る。FIG. 1 is a sectional view of a main part of a hydrostatic molding machine according to the present invention.
【図２】図１のＡ部拡大図である。FIG. 2 is an enlarged view of a portion A in FIG.
【図３】この発明によるセラミックスインサート要素体
を有するインサート器具の施工状態を示す断面図であ
る。FIG. 3 is a cross-sectional view showing an installed state of an insert device having a ceramic insert element according to the present invention.
【図４】従来のセラミックスインサート要素体を有する
インサート器具の施工状態を示す断面図である。FIG. 4 is a cross-sectional view showing a construction state of a conventional insert device having a ceramic insert element body.
２…構成物 ４…固定具 ４ａ…雄ねじ部 ５…被固定部材 ６…成形ゴム型 ７…上蓋 ８…下蓋 ８ａ…ねじ部 １１…顆粒 １２…セラミックスインサート要素体 １２ａ…雌ねじ部 Reference Signs List 2 ... Component 4 ... Fixing tool 4a ... Male screw part 5 ... Fixed member 6 ... Molded rubber mold 7 ... Top lid 8 ... Bottom lid 8a ... Screw part 11 ... Granule 12 ... Ceramic insert element body 12a ... Female screw part
Claims (3)
セラミックスインサート要素体と、インサート要素体の
雌ねじ部に螺合される雄ねじ部を有する固定具からなる
インサート器具におけるセラミックスインサート要素体
の製造方法において、主成分となる酸化アルミニウムに
焼結を助ける副成分と水を添加して原料スラリーを形成
し、この原料スラリーに有機バインダーと分散剤を添加
したものをスプレードライヤーで噴霧造粒し、得られた
顆粒を静水圧成形機により成形型を用いて所定の形状に
成形した後焼成するもので、 上記静水圧成形機による成形圧力の範囲を３００〜１０
００ｋｇ／ｃｍ2とし、上記成形型におけるセラミック
スインサート要素体の雌ねじ部を成形するねじ部がピッ
カース硬さＨＶ６００以上の金属材料により形成される
とともに、表面仕上げ粗さＲmax０．３ｍｍ以下に加工
されたことを特徴とするインサート器具におけるセラミ
ックスインサート要素体の製造方法。1. Production of a ceramic insert element body in an insert device which is embedded in a structure and has a ceramic insert element body having a female screw part and a fixture having a male screw part screwed into the female screw part of the insert element body. In the method, a raw material slurry is formed by adding water and an auxiliary component that assists sintering to aluminum oxide as a main component, and a material obtained by adding an organic binder and a dispersant to the raw material slurry is spray-granulated with a spray dryer, The obtained granules are molded into a predetermined shape using a molding die by a hydrostatic molding machine, and then fired. The range of the molding pressure by the hydrostatic molding machine is 300 to 10
And 00kg / cm 2, together with the threaded portion for forming the internal thread portion of the ceramic insert element body in the mold is formed by Vickers hardness HV600 or more metallic materials are processed below the surface finish roughness R max 0.3 mm A method for producing a ceramic insert element body in an insert device.
部に不完全ねじ部を１〜３山有するとともに、この不完
全ねじ部の切り込み角度が８０〜９５度であることを特
徴とする請求項１記載のインサート器具におけるセラミ
ックスインサート要素体の製造方法。2. The screw portion of the molding die has one to three incomplete screw portions at an end of the fixture insertion side, and a cut angle of the incomplete screw portion is 80 to 95 degrees. The method for manufacturing a ceramic insert element body for an insert device according to claim 1.
状がＲ形状であるとともに、このＲ形状の径が固定具の
雄ねじ部の径の１〜３％であることを特徴とする請求項
１または２記載のインサート器具におけるセラミックス
インサート要素体の製造方法。3. The threaded portion of the molding die has an R-shaped tip, and the radius of the R-shaped portion is 1 to 3% of the diameter of the male screw portion of the fixture. A method for producing a ceramic insert element body in an insert device according to claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10137291A JPH11322447A (en) | 1998-05-20 | 1998-05-20 | Production of ceramic insert element assembly in insert appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10137291A JPH11322447A (en) | 1998-05-20 | 1998-05-20 | Production of ceramic insert element assembly in insert appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11322447A true JPH11322447A (en) | 1999-11-24 |
Family
ID=15195261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10137291A Pending JPH11322447A (en) | 1998-05-20 | 1998-05-20 | Production of ceramic insert element assembly in insert appliance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11322447A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005028648A (en) * | 2003-07-09 | 2005-02-03 | Meidensha Corp | Manufacturing method for pressure-molded object of insert main body and manufacturing method for insert main body |
| CN109128157A (en) * | 2018-09-21 | 2019-01-04 | 广西梧州港德硬质合金制造有限公司 | A kind of production method of carbide thin round tube internal screw thread |
| CN110081064A (en) * | 2019-04-19 | 2019-08-02 | 西安明科微电子材料有限公司 | A method of it improving AlSiC part threaded hole and dismounts number |
-
1998
- 1998-05-20 JP JP10137291A patent/JPH11322447A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005028648A (en) * | 2003-07-09 | 2005-02-03 | Meidensha Corp | Manufacturing method for pressure-molded object of insert main body and manufacturing method for insert main body |
| US7504063B2 (en) | 2003-07-09 | 2009-03-17 | Kabushiki Kaisha Meidensha | Method of producing molded green body and producing insert by baking the green body |
| JP4497854B2 (en) * | 2003-07-09 | 2010-07-07 | 株式会社明電舎 | Method for manufacturing pressure molded body of insert body and method for manufacturing insert body |
| CN109128157A (en) * | 2018-09-21 | 2019-01-04 | 广西梧州港德硬质合金制造有限公司 | A kind of production method of carbide thin round tube internal screw thread |
| CN110081064A (en) * | 2019-04-19 | 2019-08-02 | 西安明科微电子材料有限公司 | A method of it improving AlSiC part threaded hole and dismounts number |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5135576A (en) | Combined structures of ceramic materials and super concrete | |
| JPH11322447A (en) | Production of ceramic insert element assembly in insert appliance | |
| JPH11320525A (en) | Manufacture of ceramic insert element for insert instrument | |
| CN102320820A (en) | Aluminum oxide abrasion resistant ceramic tube and processing method thereof | |
| CN1201911C (en) | Forming process for silicon carbide reflector blank and expansion and contraction mold | |
| US4842172A (en) | Composite refractory member | |
| JPH11322406A (en) | Production of ceramic insert element in insert apparatus | |
| CN103936443A (en) | Novel micropore corundum brick and preparation method thereof | |
| CN1159255C (en) | Inorganic combined high strength alumina-magnesia corundum-spinel steel ladle pouring material and its producing method | |
| JP3896254B2 (en) | Reinforcing bar anchor | |
| US20010005473A1 (en) | Structure and method of bonding parts | |
| JP4881359B2 (en) | Refractory for injection tuyere and method for manufacturing refractory for injection tuyere | |
| CN101244455B (en) | Method for shaping throat liner lining | |
| CN104985144A (en) | Novel rolling ingot mold and design method thereof | |
| CN1401791A (en) | Non-metal cooling wall and mfg. method thereof | |
| JPH0796228B2 (en) | Mold making method | |
| JP2003119958A (en) | Reinforcement bearer | |
| JP2003064778A (en) | Insert device | |
| CN106699175A (en) | Zirconium oxide ceramic cylinder sleeve material and preparation method thereof | |
| JP2002180547A (en) | Insert apparatus | |
| JP3869667B2 (en) | Concrete formwork holding device end stop and concrete structure | |
| JP2006281534A (en) | Manufacturing method of sintered product equipped with plurality of engagement holes | |
| JP2003095761A (en) | Method for manufacturing ceramic structure | |
| JP2003095760A (en) | Method for manufacturing ceramic structure | |
| JP2003041662A (en) | Insert main body and insert tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20040823 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20070327 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20070403 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20070814 |