JPH091514A - Hollow molding and its manufacture and manufacturing equipment thereof - Google Patents
Hollow molding and its manufacture and manufacturing equipment thereofInfo
- Publication number
- JPH091514A JPH091514A JP15440695A JP15440695A JPH091514A JP H091514 A JPH091514 A JP H091514A JP 15440695 A JP15440695 A JP 15440695A JP 15440695 A JP15440695 A JP 15440695A JP H091514 A JPH091514 A JP H091514A
- Authority
- JP
- Japan
- Prior art keywords
- hollow
- mold
- molding
- molded article
- molded body
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 46
- 238000000465 moulding Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 39
- 239000002002 slurry Substances 0.000 claims abstract description 26
- 229910010272 inorganic material Inorganic materials 0.000 claims abstract description 20
- 239000011147 inorganic material Substances 0.000 claims abstract description 20
- 238000003825 pressing Methods 0.000 claims abstract description 9
- 208000005156 Dehydration Diseases 0.000 claims description 29
- 230000018044 dehydration Effects 0.000 claims description 28
- 238000006297 dehydration reaction Methods 0.000 claims description 28
- 239000002994 raw material Substances 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 229920003002 synthetic resin Polymers 0.000 claims description 3
- 239000000057 synthetic resin Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 20
- 238000010586 diagram Methods 0.000 description 9
- 238000005452 bending Methods 0.000 description 8
- 230000005484 gravity Effects 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000012779 reinforcing material Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000012209 synthetic fiber Substances 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- LFYJSSARVMHQJB-QIXNEVBVSA-N bakuchiol Chemical compound CC(C)=CCC[C@@](C)(C=C)\C=C\C1=CC=C(O)C=C1 LFYJSSARVMHQJB-QIXNEVBVSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 239000002557 mineral fiber Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
Landscapes
- Panels For Use In Building Construction (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、脱水プレス法により予
め中空の部材を同時成形することにより、軽量且つ寸法
精度の良好な中空成形体及びその製造方法並びに製造装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow molded body which is lightweight and has good dimensional accuracy by simultaneously molding a hollow member in advance by a dewatering press method, a manufacturing method thereof and a manufacturing apparatus.
【０００２】[0002]
【従来の技術】建材に使用される窯業系板材の中で軽量
化と効率良い強度発現の為、板材中空部を中空にしたい
わゆる中空パネル等が製造されている。この中空パネル
は、図１０（Ａ），（Ｂ）に示すような「押出し成形
法」が一般に用いられている。同図に示すように、中空
体０１を製造するに際しては、先ず押出成形機０２の先
端に所望の形状の口金０３を装着し、材料を押出し出し
て中空体０１を成形すると同時に中空部０４を付与する
ようにしている。このようにして得られた中空体０１
は、外壁部材、間仕切り部材等の建材に用いられてい
る。2. Description of the Related Art Among ceramic plate materials used for building materials, so-called hollow panels and the like in which the hollow part of the plate material is hollow are manufactured in order to reduce the weight and efficiently develop strength. For this hollow panel, the “extrusion molding method” as shown in FIGS. 10 (A) and 10 (B) is generally used. As shown in the figure, when manufacturing the hollow body 01, first, a die 03 having a desired shape is attached to the tip of the extrusion molding machine 02, the material is extruded to mold the hollow body 01, and at the same time the hollow portion 04 is formed. I am trying to give it. Hollow body 01 thus obtained
Is used for building materials such as outer wall members and partition members.
【０００３】その他の中空パネルの製造方法は、図１１
に示すような金型０５を用いて原料を流込むことによ
り、中空部０６を有する中空体０７を成形する流し込み
方法や、中央部に中空を付与できる形状の金型を使用し
たプレスモールドにより製造している。Another hollow panel manufacturing method is shown in FIG.
Manufactured by a pouring method of molding a hollow body 07 having a hollow portion 06 by pouring a raw material by using a mold 05 as shown in FIG. doing.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、従来の
中空パネルの製造方法は、以下のような問題がある。 （１） 押出し成形法の問題点 製造設備が大がかりとなり、その結果設備投資が大
となり、製造コストを低廉化することができない。 また、押出された中空体の中空部０４の上部が薄く
柔らかいので、タレによる変形が生じ易いと共に、板材
長手方向の直線性が出しにくい。この結果、原材料の選
択・配合に制限があり、不良率が高くなる。 製造時に中空パネルの表面に自在な表面模様が付与
しにくい。However, the conventional method for manufacturing a hollow panel has the following problems. (1) Problems of extrusion molding method The manufacturing equipment becomes large, resulting in large capital investment, and cannot reduce the manufacturing cost. Further, since the upper portion of the hollow portion 04 of the extruded hollow body is thin and soft, deformation due to sagging is likely to occur and linearity in the longitudinal direction of the plate material is difficult to be obtained. As a result, there are restrictions on the selection and blending of raw materials, and the defective rate increases. It is difficult to give a free surface pattern to the surface of the hollow panel during manufacturing.
【０００５】（２） 流し込み法及びプレスモールド法
の問題点 一品づつ製造するので、製造効率が悪い。 長さの長い板材の製造ができない。 薄手の板材が製造できない。(2) Problems of Casting Method and Press Molding Method Since each product is manufactured individually, the manufacturing efficiency is poor. It is not possible to manufacture long plate materials. Cannot manufacture thin plate materials.
【０００６】本発明は上記事情に鑑み、脱水プレス法に
より予め中空の部材を同時成形することにより、容易に
軽量且つ寸法精度の良好な中空成形体及びその製造方法
並びに製造装置を提供することを目的とする。In view of the above circumstances, the present invention provides a hollow molded body which is easily lightweight and has good dimensional accuracy, a manufacturing method thereof, and a manufacturing apparatus, by simultaneously molding a hollow member by a dewatering press method. To aim.
【０００７】[0007]
【課題を解決するための手段】前記課題を解決する本発
明に係る中空成形体の構成は、水硬性の硬化性無機質材
料を脱水プレス成形法により成形してなる脱水プレス成
形体であって、上記脱水プレス成形体の内部に中空部材
を配して一体化してなることを特徴とする。Means for Solving the Problems A hollow molded article according to the present invention for solving the above-mentioned problems comprises a dehydration press molded article obtained by molding a hydraulic curable inorganic material by a dehydration press molding method, A hollow member is arranged inside the dewatering press-molded body to be integrated.
【０００８】上記中空成形体において、上記中空部材が
紙パイプ、合成樹脂パイプ、金属パイプ又は硬化性無機
質材料を用いたパイプの何れかからなることを特徴とす
る。The hollow molded article is characterized in that the hollow member is any one of a paper pipe, a synthetic resin pipe, a metal pipe and a pipe using a curable inorganic material.
【０００９】上記中空成形体において、上記中空部材の
内部に補強部材を配してなることを特徴とする。The hollow molded article is characterized in that a reinforcing member is arranged inside the hollow member.
【００１０】上記中空成形体において、上記中空部材の
外表面に凹凸部又は接着剤を設けて上記硬化性無機質材
料との接合性を向上させてなることを特徴とする。The hollow molded article is characterized in that a concavo-convex portion or an adhesive is provided on the outer surface of the hollow member to improve the bondability with the curable inorganic material.
【００１１】上記中空成形体において、上記中空成形体
の外表面に凹凸模様を付与してなることを特徴とする。The hollow molded article is characterized in that the hollow molded article is provided with an uneven pattern on its outer surface.
【００１２】また、本発明にかかる中空成形体の製造方
法の構成は、脱水プレス成形法により中空成形体を成形
する方法であって、金型内に硬化性無機質材料原料スラ
リーを投入すると共に上記中空部材を配設し、脱水プレ
ス法により一体成形することを特徴とする。The method for producing a hollow molded article according to the present invention is a method for molding a hollow molded article by a dehydration press molding method, in which a curable inorganic material raw material slurry is charged into a mold and It is characterized in that a hollow member is provided and integrally molded by a dehydration press method.
【００１３】上記中空成形体の製造方法において、上記
脱水プレス法が原料スラリー中の水を強制搾水しつつ加
圧・成形するバキュームプレス法であることを特徴とす
る。In the method for producing a hollow molded body, the dewatering press method is a vacuum press method of pressing and molding while forcibly squeezing water in the raw material slurry.
【００１４】上記中空成形体の製造方法において、上記
脱水プレス法が原料スラリーの両面から搾水しつつ加圧
・成形することを特徴とする。In the method for producing a hollow molded body, the dewatering press method is characterized by pressing and molding while squeezing water from both sides of the raw material slurry.
【００１５】上記中空成形体の製造方法において、原料
の投入を分割して行い、第１回目の原料の投入後に中空
部材を配設し、該中空部材の配設位置を第１回目の投入
量により適宜変更できることを特徴とする。In the above-mentioned method for producing a hollow molded body, the raw materials are charged in a divided manner, the hollow members are arranged after the first charging of the raw materials, and the positions of the hollow members are set in the first charging amount. It is characterized in that it can be appropriately changed by.
【００１６】上記中空成形体の製造方法において、中空
部材の配設の際に該中空部材の両端面の開口を閉塞しつ
つ配設することを特徴とする。In the method for producing a hollow molded body, when the hollow member is arranged, the hollow member is arranged while closing the openings of both end surfaces of the hollow member.
【００１７】上記中空成形体の製造方法において、脱水
プレス法により同時成形して得られた後の脱水成形体の
硬化前又は硬化後のいずれかにおいて、上記中空部材を
引き抜くことを特徴とする。In the method for producing a hollow molded body, the hollow member is extracted before or after curing of the dehydrated molded body obtained by simultaneous molding by a dehydration press method.
【００１８】上記中空成形体を成形する方法であって、
金型内に硬化性無機質材料原料スラリーを投入すると共
に中実部材を配設し、脱水プレス法により一体成形して
得られた後の脱水成形体の硬化前又は硬化後のいずれか
において、上記中実部材を引き抜くことを特徴とする。A method for molding the above hollow molded article, comprising:
The curable inorganic material raw material slurry is charged into the mold and the solid member is disposed, and before or after curing of the dehydrated molded article obtained by integrally molding by the dehydration press method, the above The feature is that the solid member is pulled out.
【００１９】また、本発明にかかる中空成形体を製造す
るための装置の構成は、上型と下型とから構成され、該
下型内に硬化性無機質材料を投入してなる金型からな
り、該下型は中型と、該中型の周囲を鉛直方向に移動動
可能な外型とを有し、且つ、下型の内部に中空部材の配
設と硬化性無機質材料スラリーの投入とをした後、加圧
・脱水処理して、成形体の内部に中空部材を配して一体
化してなる中空成形体を製造する装置でにおいて、上記
下型を構成する外型が、鉛直方向に移動自在の第１の外
型と、該第１の外型の上面に設けられると共に上記上型
との間で鉛直方向と直交する方向に相対向して移動自在
且つ鉛直方向に上記第１の外型と共に移動自在の第２の
外型とを設け、且つ中空部材の両端部が上記第１の外型
の上面に載置されると共に、該中空部材の両端開口部を
上記第２の外型の対向面により閉塞してなることを特徴
とする。The structure of the apparatus for producing the hollow molded article according to the present invention is composed of an upper mold and a lower mold, and a mold in which a curable inorganic material is put into the lower mold. The lower mold has a middle mold and an outer mold that can move vertically around the middle mold, and a hollow member is disposed inside the lower mold and a curable inorganic material slurry is added. After that, in an apparatus for manufacturing a hollow molded body in which a hollow member is placed inside the molded body and integrated by pressure / dehydration, the outer mold forming the lower mold is movable in the vertical direction. The first outer mold and the first outer mold provided on the upper surface of the first outer mold and movable in opposition to each other in the direction orthogonal to the vertical direction between the upper mold and the first outer mold. And a movable second outer die, and both ends of the hollow member are placed on the upper surface of the first outer die. Both the openings at both ends of the hollow member characterized by being closed by the opposing face of the second outer mold.
【００２０】以下、本発明の内容を詳細に説明する。The contents of the present invention will be described in detail below.
【００２１】図１は本発明の中空成形体の製造方法の概
略図を示す。同図に示すように、中空成形体の製造用の
金型は、上下動可能な上型１１と下型１２とから構成さ
れている。上記下型１２は、さらに中型１３と、該中型
１３の外周を鉛直方向に移動動可能な外型１４とを有し
ている。そして、上記下型１２内に、硬化性無機質材料
スラリー（以下「原料スラリー」という。）１５の一部
を投入し、その後、図２に示すような中空パイプ１６を
上記材料の上面に配置し、その上に残りの原料スラリー
１５を投入する。FIG. 1 shows a schematic view of the method for producing a hollow molded article of the present invention. As shown in the figure, the mold for manufacturing the hollow molded body is composed of an upper mold 11 and a lower mold 12 which are vertically movable. The lower die 12 further includes a middle die 13 and an outer die 14 that is movable around the outer periphery of the middle die 13 in the vertical direction. Then, a part of the curable inorganic material slurry (hereinafter referred to as “raw material slurry”) 15 is put into the lower mold 12, and then a hollow pipe 16 as shown in FIG. 2 is placed on the upper surface of the material. Then, the remaining raw material slurry 15 is put thereon.
【００２２】次いで、脱水プレス機を用いて加圧・脱水
処理し、型から取り出して養生・硬化させて、内部に三
本の中空パイプ１６を配設した中空成形体である中空パ
ネルを製造している。Next, a hollow panel, which is a hollow molded body in which three hollow pipes 16 are arranged, is manufactured by pressurizing / dehydrating using a dehydrating press, removing from the mold, curing and curing. ing.
【００２３】上記中空パイプ１６の配設には、該パイプ
の中空内に原料スラリー１５が侵入しないように、両端
開口部１６ａに蓋１６ｂ等を装着している。In the arrangement of the hollow pipe 16, a lid 16b or the like is attached to both end openings 16a so that the raw material slurry 15 does not enter the hollow of the pipe.
【００２４】なお、脱水プレス後の養生の前において、
中空パイプ１６を引き抜いて、図３（Ｂ）に示すような
中空部１８を有する中空パネル１７Ｂを得るようにして
もよい。この際予め中空パイプ１６の表面に離型剤を塗
布しておけば、上記引抜きが容易となる。Before curing after the dehydration press,
The hollow pipe 16 may be pulled out to obtain a hollow panel 17B having a hollow portion 18 as shown in FIG. At this time, if the release agent is applied to the surface of the hollow pipe 16 in advance, the above-mentioned drawing can be facilitated.
【００２５】上記中空パイプ１６の引抜きにおいては、
脱水プレス後の養生の前及び硬化後のいずれにおいても
よい。更に、引き抜く場合には材料も限定されず、上記
中空部材に限らず、中実部材であってもよい。In drawing out the hollow pipe 16,
It may be before curing after dehydration pressing or after curing. Further, the material for pulling out is not limited, and the hollow member is not limited to the hollow member, and may be a solid member.
【００２６】また、上記上型１１の搾水側においては、
効率よく水を抜くことができるよう、水抜き鉄板１８及
び脱水布２０を介して搾水するようにしている。On the water squeezing side of the upper mold 11,
In order to drain water efficiently, water is drained through the drainage iron plate 18 and the dehydration cloth 20.
【００２７】ここで、本発明で硬化性無機質材料とは、
セメント、セッコウ、あるいはケイ酸カルシウム反応物
を生成させるに必要なケイ酸質原料と石灰質原料との混
合物等を主とし、その他各種混和材・補強材を適宜配合
してなるものをいう。該材料に適宜水を配合してスラリ
ー状態にして用いる。また、上記各種混和材としては、
例えば、スラグ、フライアッシュ、シリカフューム、
砂、炭酸カルシウム粉末、ケイ石粉、パーライト、シリ
カバルーン等を挙げることができ、また成形助剤として
増粘剤、減水剤、流動化剤等を適宜混合することができ
る。さらに、上記各種補強材としては、有機合成繊維、
ガラス繊維、炭素繊維、金属繊維、鉱物質繊維、及び天
然有機繊維（セルロースパルプ繊維等）等を挙げること
ができ、これらを適宜添加し成形体のパネル材として必
要な性能特性を付与することが出来る。Here, the curable inorganic material in the present invention means
It is mainly composed of cement, gypsum, or a mixture of a siliceous raw material and a calcareous raw material necessary for producing a calcium silicate reaction product, and is appropriately mixed with various other admixtures / reinforcing materials. Water is appropriately added to the material to prepare a slurry state. Further, as the various admixtures,
For example, slag, fly ash, silica fume,
Examples thereof include sand, calcium carbonate powder, silica stone powder, pearlite, and silica balloon, and a thickening agent, a water reducing agent, a fluidizing agent and the like can be appropriately mixed as a molding aid. Furthermore, as the above-mentioned various reinforcing materials, organic synthetic fibers,
Examples thereof include glass fiber, carbon fiber, metal fiber, mineral fiber, and natural organic fiber (cellulosic pulp fiber, etc.), which may be appropriately added to impart performance characteristics required as a panel material for a molded article. I can.
【００２８】本発明で中空部材としては、例えば紙パイ
プ、合成樹脂パイプ、金属パイプ等の上記成形体を形成
する上記硬化性無機質材料と異種材質の各種パイプを挙
げることができる。また、上記硬化性無機質材料を用い
てなる同材質の中空パイプを用いることもできる。In the present invention, examples of the hollow member include various pipes such as paper pipes, synthetic resin pipes, metal pipes and the like, which are different in material from the above-mentioned curable inorganic material forming the above-mentioned molded body. Alternatively, a hollow pipe made of the above-mentioned curable inorganic material and made of the same material can be used.
【００２９】上記中空部材１６の形状は、図４（Ａ）に
示すように断面形状が丸型の中空パイプ１６Ａのものに
限らず、図４（Ｂ）〜（Ｅ）に示すように、矩形型・三
角型等の各種の形状のパイプ１６Ｂ〜１６Ｅを用いるよ
うにしてもよい。また、図４（Ｆ）に示すように、上記
中空パイプ１６Ａの外周部に突起１６ｃ等を設けること
により、又は接着剤等を塗布することにより、成形体と
の密着性を向上させて、複合化効率を向上させ、強度の
向上、剛性の向上及び割れた際においてもバラバラにな
らないようにしてもよい。The shape of the hollow member 16 is not limited to the hollow pipe 16A having a round cross section as shown in FIG. 4 (A), but a rectangular shape as shown in FIGS. 4 (B) to 4 (E). The pipes 16B to 16E having various shapes such as molds and triangles may be used. Further, as shown in FIG. 4 (F), by providing a protrusion 16c or the like on the outer peripheral portion of the hollow pipe 16A, or by applying an adhesive or the like, the adhesion with the molded body is improved, and the composite It is also possible to improve the conversion efficiency so that the strength is improved, the rigidity is improved, and even if a crack occurs, the pieces do not come apart.
【００３０】上記中空パイプ１６の形状を、図４（Ｂ）
に示すような断面形状が角型のパイプ１６Ｂを用いるこ
とにより、図５に示すように、従来の押出し成形法によ
って成形する際には得られなかった中空の角パイプ１６
Ｂと中空パネル板１９の表面との厚さＤを極力薄くする
ことができる。この際、脱水プレス時にパイプにかかる
圧力に抗するように、中空部材には、図６（Ａ）〜
（Ｃ）に示すように、上記中空部材の内周部に筋交い１
６ｄ等の補強材等を設けることにより、パイプの強度を
向上するようにしてもよい。The shape of the hollow pipe 16 is shown in FIG.
By using the pipe 16B having a square cross-sectional shape as shown in Fig. 5, as shown in Fig. 5, a hollow square pipe 16 which cannot be obtained by the conventional extrusion molding method is obtained.
The thickness D between B and the surface of the hollow panel plate 19 can be made as thin as possible. At this time, in order to resist the pressure applied to the pipe during the dewatering press, the hollow member has a structure shown in FIG.
As shown in (C), a brace 1 is provided on the inner peripheral portion of the hollow member.
The strength of the pipe may be improved by providing a reinforcing material such as 6d.
【００３１】本発明では、中空部材を成形体の内部に配
設して容易に軽量且つ寸法精度の良好な中空成形体を得
るようにしているが、本発明はこれに限定されず、上記
中空部材の替わりに、軽量の発泡有機材料による軽量化
材を内部に配して、軽量化を図るようにしてもよい。但
し、脱水プレス後の圧力解除時においてスプリングバッ
クが強い材料等を用いる場合には、成形体にヒビ等が入
るので、スプリングバックが強くない軽量化材料を選定
する必要がある。In the present invention, the hollow member is arranged inside the molded body so as to easily obtain a hollow molded body which is lightweight and has good dimensional accuracy, but the present invention is not limited to this, and the hollow body described above is used. Instead of the members, a weight-reducing material made of a light-weight organic foam material may be disposed inside to reduce the weight. However, when a material having a strong springback is used when releasing the pressure after the dewatering press, a molded article may be cracked, so it is necessary to select a lightweight material that does not have a strong springback.
【００３２】次に、図７を参照して本発明の中空成形体
の他の製造方法の概略を説明する。同図に示すように、
中空成形体の製造用の金型は、上下動可能な上型１１と
下型１２とから構成されている。上記下型１２は、中型
１３と、該中型１３の外周を鉛直方向に移動動可能な外
型１４とを有しており、さらに上記外型１４は鉛直方向
に移動自在の第１の外型１４−１と、該第１の外型１４
−１の上面に設けられると共に上記上型１１との間で鉛
直方向と直交する方向に相対向して移動自在であり且つ
鉛直方向に上記第１の外型１４−１と共に移動自在の第
２の外型１４−２とから構成されている。そして、上記
第１の外型１４−１の上面に中空パイプ１６を配設し該
中空部材の両端開口部を上記第２の外型１４−２の相対
向する面により閉塞することにより、原料の投入時にパ
イプ１６内に当該原料の侵入を防止している。Next, referring to FIG. 7, the outline of another method for producing the hollow molded article of the present invention will be described. As shown in the figure,
The mold for manufacturing the hollow molded body is composed of an upper mold 11 and a lower mold 12 which are vertically movable. The lower die 12 has a middle die 13 and an outer die 14 that is movable in the vertical direction on the outer periphery of the middle die 13, and the outer die 14 is a first outer die that is vertically movable. 14-1 and the first outer mold 14
-1, which is provided on the upper surface of -1, is movable in opposition to the upper mold 11 in a direction orthogonal to the vertical direction, and is movable in the vertical direction together with the first outer mold 14-1. And the outer mold 14-2. Then, the hollow pipe 16 is provided on the upper surface of the first outer mold 14-1, and the opening portions at both ends of the hollow member are closed by the surfaces of the second outer mold 14-2 that face each other. Of the raw material is prevented from entering the pipe 16 at the time of charging.
【００３３】すなわち、図７（Ａ）に示すように、上記
下型１２内に原料スラリー１５を投入した後に、図７
（Ｂ）に示すように中空パイプ１６の両端部を上記第１
の外型１４−１の上面の角部のギリギリのところに載置
し、次いで相対向する第２の外型１４−２同士を移動さ
せて相対向する面で上記中空パイプ１６の両端開口部を
閉塞するようにし、残りの原料スラリー１５を投入し脱
水プレスする。その後、図８（Ａ）及び（Ｂ）に示すよ
うに、上記相対向する第２の外型１４−２同士を少し外
側に移動させて次いで下方側に第１の外型１４−１と共
に移動させて、脱型するようにして、成形体１７Ｃを得
るようにしている。That is, as shown in FIG. 7 (A), after the raw material slurry 15 is put into the lower mold 12, as shown in FIG.
As shown in (B), the both ends of the hollow pipe 16 are
The outer mold 14-1 is placed at a corner of the upper surface of the outer mold 14-1, and then the second outer molds 14-2 facing each other are moved to open the both ends of the hollow pipe 16 at the facing surfaces. Is closed, the remaining raw material slurry 15 is charged, and dewatering press is performed. After that, as shown in FIGS. 8A and 8B, the second outer dies 14-2 facing each other are slightly moved outward, and then are moved downward together with the first outer die 14-1. Then, the molded body 17C is obtained by demolding.
【００３４】本発明では脱水プレス機を用いて脱水プレ
ス処理するが、脱水処理方法は特に限定されるものでは
なく、例えば、図１中に示す上型１１に搾水用の細孔１
１ａを複数配してプレス時に搾水して、スラリー中の余
分な水分を排除するようにしてもよい。また、この搾水
は必要に応じて上型以外に下型においても行うようにし
てもよい。なお、脱水プレス成形の圧力は材料組成及び
内部に挿入するパイプの材質とも関係するが、紙パイプ
を用いる場合には約１０ｋｇ／ｃｍ2 程度とし、その他
の材質のパイプにおいては約４０〜１００ｋｇ／ｃｍ2
程度とするのが良いが、必ずしもこれに限定されるもの
ではない。In the present invention, the dehydration press treatment is carried out using a dehydration press machine, but the dehydration treatment method is not particularly limited, and for example, the upper mold 11 shown in FIG.
A plurality of 1a may be arranged and water may be squeezed during pressing to remove excess water in the slurry. Further, this water squeezing may be performed not only in the upper mold but also in the lower mold, if necessary. The pressure of the dehydration press molding is related to the material composition and the material of the pipe to be inserted inside, but when using a paper pipe, it is about 10 kg / cm 2, and for other pipes, it is about 40 to 100 kg / cm 2. cm 2
The degree is good, but it is not necessarily limited to this.
【００３５】また、本発明において、中型１３の表面に
模様等を付しておけば、脱水プレス時に成形体の表面に
所望の模様が転写できるので、従来に較べて製品のバリ
エーションが大幅に向上することができる。Further, in the present invention, if the surface of the middle mold 13 is provided with a pattern or the like, the desired pattern can be transferred to the surface of the molded body during the dewatering press, so that the variation of the product is greatly improved as compared with the conventional one. can do.
【００３６】また、本発明方法は脱水プレスを用いてい
るので、成形後、直ぐに脱型出来るため金型は一つです
み、短時間で大量に中空成形体を製造することができ、
製造効率がよい。即ち、従来の製造方法では成形後、脱
型までに時間を要していたが、本発明によれば、材料を
投入し、次いで中空パイプを配し、その後に残りの材料
を投入し、脱水プレスによって成形、即脱型することに
より、簡易に中空パネルを製造することができる。Further, since the method of the present invention uses the dewatering press, since it is possible to remove the mold immediately after molding, only one mold is required and a large number of hollow molded products can be produced in a short time.
Good manufacturing efficiency. That is, in the conventional manufacturing method, it took time to remove the mold after molding, but according to the present invention, the material is charged, then the hollow pipe is arranged, and then the remaining material is charged, and dehydration is performed. A hollow panel can be easily manufactured by molding by pressing and immediately releasing from the mold.
【００３７】また、必要に応じて、例えば鉄筋やネット
及び孔空き鉄板等の補強材をプレス成形時に同時に成形
体裏面又はその内部に成形することができ、強度面の補
強が可能となる。Further, if necessary, a reinforcing material such as a reinforcing bar, a net and a perforated iron plate can be simultaneously molded on the back surface of the molded body or inside thereof at the time of press molding, so that the strength side can be reinforced.
【００３８】[0038]
【実施例】以下、本発明の好適な一実施例を詳細に説明
する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described in detail.
【００３９】〔実施例１〕図１に示す装置を用い、下記
配合の原料スラリーを用いて、中空パネルを成形した。 （配合） （ｗｔ％） セメント ６０ 砂 ４０ 有機合成繊維 １．０ 水 ３３ メチルセルロース ０．１ 上記配合による原料スラリーを下型１２に約１／３程度
投入した。次いで、中空部材として紙パイプ（直径２０
ｍｍ）２１の両端開口部を閉塞したものを用意し、上記
原料スラリー１５の上に６本載置し、次いで残りの２／
３の原料スラリーを投入した。その後、脱水プレス成形
（圧力：１０ｋｇ／ｃｍ2 ）し、直ちに脱型し、６０℃
で１２時間のスチーム養生を行った。Example 1 Using the apparatus shown in FIG. 1, a hollow panel was formed by using the raw material slurry having the following composition. (Compounding) (wt%) Cement 60 Sand 40 Organic synthetic fiber 1.0 Water 33 Methylcellulose 0.1 About 1/3 of the raw material slurry having the above composition was put into the lower mold 12. Then, as a hollow member, a paper pipe (diameter 20
mm) 21 with both end openings closed, 6 pieces are placed on the raw material slurry 15, and then the remaining 2 /
3 raw material slurry was added. After that, dehydration press molding (pressure: 10 kg / cm 2 ) was immediately performed, and the mold was immediately removed, and the temperature was 60 ° C.
I had 12 hours of steam curing.
【００４０】養生後、図９（Ａ）に示すような、厚さ
Ｔ：４０ｍｍ、幅Ｗ：５００ｍｍの中空パネル２２を得
ることができた。得られたパネル２２の比重と曲げ強度
とを測定したところ、比重は１．７７であり、曲げ強度
は１２９ｋｇ／ｃｍ2 であった。なお、上記曲げ強度の
測定は、中央一線荷重によった。After curing, a hollow panel 22 having a thickness T of 40 mm and a width W of 500 mm as shown in FIG. 9 (A) could be obtained. When the specific gravity and bending strength of the obtained panel 22 were measured, the specific gravity was 1.77 and the bending strength was 129 kg / cm 2 . The measurement of the bending strength was based on the center line load.
【００４１】〔比較例１〕比較としてパイプを有しない
パネルを同様の操作によって得た後、その比重及び曲げ
強度を測定したが、比重は１．９６で、曲げ強度は１２
５ｋｇ／ｃｍ2 であったが、本実施例と較べた場合、曲
げ強度は同等であるが比重は大きかった。Comparative Example 1 For comparison, a panel having no pipe was obtained by the same operation, and its specific gravity and bending strength were measured. The specific gravity was 1.96 and the bending strength was 12
It was 5 kg / cm 2 , but when compared with this example, the bending strength was the same, but the specific gravity was large.
【００４２】〔実施例２〕実施例１と同様な成形をする
際、中空部材として塩化ビニル製の中空パイプ（直径２
６ｍｍ及び肉厚２ｍｍ）２３を１０本用い、さらに金型
の中型の表面に石模様を施したものを用いて、プレス
圧：５０ｋｇ／ｃｍ2 で脱水プレスすることにより、表
面に石模様を形成した中空成形体２４を成形することが
できた。得られたパネル２２の比重と曲げ強度とを測定
したところ、比重は１．６２であり、曲げ強度は１２０
ｋｇ／ｃｍ2 であった。[Embodiment 2] A hollow pipe made of vinyl chloride (diameter 2) is used as a hollow member when molding is carried out in the same manner as in Embodiment 1.
6 mm and wall thickness 2 mm) 23 are used, and further, a stone pattern is formed on the surface by dewatering and pressing at a press pressure of 50 kg / cm 2 using a medium-sized die with a stone pattern. It was possible to mold the hollow molded body 24. When the specific gravity and bending strength of the obtained panel 22 were measured, the specific gravity was 1.62 and the bending strength was 120.
kg / cm 2 .
【００４３】〔実施例３〕実施例１と同様にプレス圧５
０ｋｇ／ｃｍ2 で脱水プレス成形をする際、上型に凹凸
を付与し、図９（Ｃ）に示すような中空部材として塩化
ビニル製の中空パイプ２４−１〜２４−３を用い、下記
配合の原料スラリーによって凹凸形状のパネル２５を得
た。 （配合） （ｗｔ％） 半水石膏 ９５ パーライト ５ ガラス繊維 １．０ 凝結遅延剤 ０．２ 水 ３３[Embodiment 3] Pressing pressure 5 as in Embodiment 1.
When performing dehydration press molding at 0 kg / cm 2 , unevenness is provided on the upper mold, and vinyl chloride hollow pipes 24-1 to 24-3 are used as hollow members as shown in FIG. An uneven panel 25 was obtained by using the raw material slurry of. (Compounding) (wt%) Hemihydrate gypsum 95 Perlite 5 Glass fiber 1.0 Setting retarder 0.2 Water 33
【００４４】〔比較例２〕上記中空パイプ２４−１〜２
４−３を用いないで同様にして、図９（Ｄ）に示す成形
体パネル２６を得たが、Ｘ部において、脱水が不良とな
り、成形できなかった。[Comparative Example 2] The hollow pipes 24-1 and 24-2
A molded body panel 26 shown in FIG. 9 (D) was obtained in the same manner without using 4-3, but in the X part, dehydration was poor and molding could not be performed.
【００４５】[0045]
【発明の効果】以上述べたように、本発明によれば、予
め中空部材を配設して脱水プレス法によりを同時成形す
ることにより、容易に寸法精度が良好で強度の高く且つ
比重が軽い中空成形体を提供することができる。As described above, according to the present invention, by arranging a hollow member in advance and performing simultaneous molding by the dewatering press method, it is possible to easily obtain good dimensional accuracy, high strength and low specific gravity. A hollow molded body can be provided.
【００４６】また、本発明方法は脱水プレスを用いてい
るので、金型によりパネル状のものを容易に成形するこ
とができ、従来の押出し法や、プレスモールド法等より
も任意の形状の成形体を製造することができ、製造効率
がよい。Further, since the method of the present invention uses the dehydration press, it is possible to easily mold a panel-shaped product with a mold, and to mold a desired shape as compared with the conventional extrusion method or press molding method. The body can be manufactured and the manufacturing efficiency is good.
【００４７】さらに、本発明によれば、簡易な方法によ
り寸法精度のよい以下のような中空成形体を得ることが
出来る。 軽量且つ長尺の薄板を効率良く成形ができる。 表面模様の付与が可能な板材ができる。 複合化による強度の向上及び耐衝撃力の向上を図るこ
とができる。 設備投資が少なくて済む。 幅広い窯業系の材料に適用が可能である。 長尺板材に限定されず、任意の形状の成形体の作成が
可能である。Further, according to the present invention, the following hollow molded article having good dimensional accuracy can be obtained by a simple method. A light and long thin plate can be efficiently formed. A plate material capable of imparting a surface pattern is formed. It is possible to improve the strength and the impact resistance by compounding. Less capital investment required. It can be applied to a wide range of ceramic materials. The present invention is not limited to the long plate material, and it is possible to create a molded body of any shape.
【図１】本発明にかかる中空成形体の製造の一例を示す
図である。FIG. 1 is a diagram showing an example of production of a hollow molded body according to the present invention.
【図２】本発明にかかる中空部材の一例を示す図であ
る。FIG. 2 is a diagram showing an example of a hollow member according to the present invention.
【図３】本発明にかかる中空成形体の一例を示す図であ
る。FIG. 3 is a view showing an example of a hollow molded body according to the present invention.
【図４】本発明にかかる他の中空部材の一例を示す図で
ある。FIG. 4 is a diagram showing an example of another hollow member according to the present invention.
【図５】本発明にかかる他の中空成形体の一例を示す図
である。FIG. 5 is a diagram showing an example of another hollow molded body according to the present invention.
【図６】本発明にかかる他の中空部材の一例を示す図で
ある。FIG. 6 is a diagram showing an example of another hollow member according to the present invention.
【図７】本発明にかかる他の中空成形体の製造の一例を
示す図である。FIG. 7 is a diagram showing an example of production of another hollow molded body according to the present invention.
【図８】本発明にかかる他の中空成形体の製造の一例を
示す図である。FIG. 8 is a diagram showing an example of production of another hollow molded body according to the present invention.
【図９】本実施例にかかる中空成形体の正面図であり、
（Ａ）〜（Ｃ）は実施例品及び（Ｄ）は比較品である。FIG. 9 is a front view of the hollow molded body according to the present embodiment,
(A) to (C) are example products and (D) is a comparative product.
【図１０】従来例にかかる押出し法による中空成形体の
製造の一例を示す図である。FIG. 10 is a diagram showing an example of manufacturing a hollow molded body by an extrusion method according to a conventional example.
【図１１】従来例にかかる流し込み法による中空成形体
の製造の一例を示す図である。FIG. 11 is a diagram showing an example of manufacturing a hollow molded body by a casting method according to a conventional example.
１０ 金型 １１ 上型 １２ 下型 １３ 中型 １４ 外型 １５ 硬化性無機質材料スラリー（原料スラリー） １６，１６Ａ〜６Ｆ 中空パイプ １７Ａ，１７Ｂ，１７Ｃ 中空パネル 10 mold 11 upper mold 12 lower mold 13 medium mold 14 outer mold 15 curable inorganic material slurry (raw material slurry) 16, 16A to 6F hollow pipe 17A, 17B, 17C hollow panel
───────────────────────────────────────────────────── フロントページの続き (72)発明者 村田 浩 茨城県石岡市東光台四丁目13番２号 (72)発明者 佐藤 和弘 千葉県佐倉市大作二丁目４番２号 秩父小 野田株式会社中央研究所内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hiroshi Murata 4-13-2 Tokodai, Ishioka-shi, Ibaraki (72) Inventor Kazuhiro Sato 2-4-2 Daisaku, Sakura-shi, Chiba Chichibu Onoda Co., Ltd. Chuo In the laboratory
Claims (13)
成形法により成形してなる脱水プレス成形体であって、 上記脱水プレス成形体の内部に中空部材を配して一体化
してなることを特徴とする中空成形体。1. A dehydration press-molded product obtained by molding a hydraulic curable inorganic material by a dehydration press-molding method, wherein a hollow member is arranged inside the dehydration-press mold to be integrated. Characteristic hollow molded body.
又は硬化性無機質材料を用いたパイプの何れかからなる
ことを特徴とする中空成形体。2. The hollow molded article according to claim 1, wherein the hollow member is any one of a paper pipe, a synthetic resin pipe, a metal pipe, and a pipe using a curable inorganic material. .
て、 上記中空部材の内部に補強部材を配してなることを特徴
とする中空成形体。3. The hollow molded body according to claim 1, wherein a reinforcing member is arranged inside the hollow member.
て、 上記中空部材の外表面に凹凸部又は接着剤を設けて上記
硬化性無機質材料との接合性を向上させてなることを特
徴とする中空成形体。4. The hollow molded article according to any one of claims 1 to 3, wherein an uneven portion or an adhesive is provided on the outer surface of the hollow member to improve the bondability with the curable inorganic material. Hollow molded body.
て、 上記中空成形体の外表面に凹凸模様を付与してなること
を特徴とする中空成形体。5. The hollow molded article according to any one of claims 1 to 4, wherein the hollow molded article is provided with an uneven pattern on the outer surface thereof.
形する方法であって、 金型内に硬化性無機質材料原料スラリーを投入すると共
に上記中空部材を配設し、脱水プレス法により一体成形
することを特徴とする中空成形体の製造方法。6. A method for molding a hollow molded article by a dehydration press molding method, which comprises charging a curable inorganic material raw material slurry into a mold, disposing the hollow member, and integrally molding by a dehydration press method. A method for producing a hollow molded article, comprising:
おいて、 上記脱水プレス法が原料スラリー中の水を強制搾水しつ
つ加圧・成形するバキュームプレス法であることを特徴
とする中空成形体の製造方法。7. The hollow molding method according to claim 6, wherein the dewatering press method is a vacuum press method in which water in the raw material slurry is pressed and molded while forcibly squeezing water. Method for manufacturing molded body.
方法において、 上記脱水プレス法が原料スラリーの両面から搾水しつつ
加圧・成形することを特徴とする中空成形体の製造方
法。8. The method for producing a hollow molded article according to claim 6 or 7, wherein the dehydration pressing method presses and molds while squeezing water from both sides of the raw material slurry. .
法において、 原料の投入を分割して行い、第１回目の原料の投入後に
中空部材を配設し、該中空部材の配設位置を第１回目の
投入量により適宜変更できることを特徴とする中空成形
体の製造方法。9. The method for producing a hollow molded body according to claim 6, wherein the raw materials are charged in a divided manner, the hollow member is disposed after the first charging of the raw materials, and the hollow members are disposed. A method for producing a hollow molded article, wherein the position can be appropriately changed depending on the amount of the first injection.
方法において、 中空部材の配設の際に該中空部材の両
端面の開口を閉塞しつつ配設することを特徴とする中空
成形体の製造方法。10. The method for producing a hollow molded article according to claim 6, wherein when the hollow member is provided, the hollow member is provided while closing openings at both end surfaces of the hollow member. Body manufacturing method.
造方法において、 脱水プレス法により一体成形して得られた後の脱水成形
体の硬化前又は硬化後のいずれかにおいて、上記中空部
材を引き抜くことを特徴とする中空成形体の製造方法。11. The method for producing a hollow molded body according to claim 6, wherein the hollow member is either before or after curing of the dehydrated molded body obtained by integral molding by a dehydration press method. A method for producing a hollow molded article, comprising:
成形する方法であって、 金型内に硬化性無機質材料原料スラリーを投入すると共
に中実部材を配設し、脱水プレス法により一体成形して
得られた後の脱水成形体の硬化前又は硬化後のいずれか
において、上記中実部材を引き抜くことを特徴とする中
空成形体の製造方法。12. A method for molding a hollow molded article by a dehydration press molding method, comprising introducing a curable inorganic material raw material slurry into a mold, disposing a solid member, and integrally molding by a dehydration press method. A method for producing a hollow molded article, characterized in that the solid member is pulled out either before or after curing of the dehydrated molded article obtained as described above.
に硬化性無機質材料を投入してなる金型からなり、 該下型は中型と、該中型の周囲を鉛直方向に移動動可能
な外型とを有し、 且つ、下型の内部に中空部材の配設と硬化性無機質材料
スラリーの投入とをした後、加圧・脱水処理して、 成形体の内部に中空部材を配して一体化してなる中空成
形体を製造する装置でにおいて、 上記下型を構成する外型が、鉛直方向に移動自在の第１
の外型と、該第１の外型の上面に設けられると共に上記
上型との間で鉛直方向と直交する方向に相対向して移動
自在且つ鉛直方向に上記第１の外型と共に移動自在の第
２の外型とを設け、 且つ中空部材の両端部が上記第１の外型の上面に載置さ
れると共に、該中空部材の両端開口部を上記第２の外型
の対向面により閉塞してなることを特徴とする中空成形
体の製造装置。13. A mold comprising an upper mold and a lower mold, wherein a curable inorganic material is put into the lower mold, and the lower mold moves vertically around the middle mold and the periphery of the middle mold. After having a movable outer mold and arranging the hollow member inside the lower mold and introducing the curable inorganic material slurry, pressurization / dehydration treatment is performed to form a hollow member inside the molded body. In an apparatus for producing a hollow molded body by arranging and integrating the above, an outer die forming the lower die is movable in a vertical direction.
Of the outer die and the upper die of the first outer die, and the upper die and the upper die are movable in opposition to each other in a direction orthogonal to the vertical direction and vertically movable together with the first outer die. And a second outer die of the hollow member, and both end portions of the hollow member are placed on the upper surface of the first outer die, and opening portions at both ends of the hollow member are formed by the facing surfaces of the second outer die. An apparatus for manufacturing a hollow molded body, which is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15440695A JP3723607B2 (en) | 1995-06-21 | 1995-06-21 | Hollow molded body manufacturing apparatus and hollow molded body manufacturing method using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15440695A JP3723607B2 (en) | 1995-06-21 | 1995-06-21 | Hollow molded body manufacturing apparatus and hollow molded body manufacturing method using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH091514A true JPH091514A (en) | 1997-01-07 |
| JP3723607B2 JP3723607B2 (en) | 2005-12-07 |
Family
ID=15583461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15440695A Expired - Lifetime JP3723607B2 (en) | 1995-06-21 | 1995-06-21 | Hollow molded body manufacturing apparatus and hollow molded body manufacturing method using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3723607B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113443878A (en) * | 2018-12-27 | 2021-09-28 | 北京市市政工程研究院 | Ultra-high performance concrete hollow slab and preparation method thereof |
-
1995
- 1995-06-21 JP JP15440695A patent/JP3723607B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113443878A (en) * | 2018-12-27 | 2021-09-28 | 北京市市政工程研究院 | Ultra-high performance concrete hollow slab and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3723607B2 (en) | 2005-12-07 |
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