JPH01160607A - Manufacture of molded object - Google Patents
Manufacture of molded objectInfo
- Publication number
- JPH01160607A JPH01160607A JP32196287A JP32196287A JPH01160607A JP H01160607 A JPH01160607 A JP H01160607A JP 32196287 A JP32196287 A JP 32196287A JP 32196287 A JP32196287 A JP 32196287A JP H01160607 A JPH01160607 A JP H01160607A
- Authority
- JP
- Japan
- Prior art keywords
- template
- developed
- uniform
- press
- density
- 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 description 8
- 239000000463 material Substances 0.000 claims abstract description 87
- 238000000465 moulding Methods 0.000 claims abstract description 27
- 239000004568 cement Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000009969 flowable effect Effects 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 239000002023 wood Substances 0.000 claims abstract description 6
- 239000012779 reinforcing material Substances 0.000 claims abstract description 4
- 238000009499 grossing Methods 0.000 claims abstract description 3
- 238000003892 spreading Methods 0.000 claims description 3
- 238000007906 compression Methods 0.000 abstract description 21
- 230000006835 compression Effects 0.000 abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000005056 compaction Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 239000010410 layer Substances 0.000 description 8
- 238000007596 consolidation process Methods 0.000 description 3
- 238000000748 compression moulding Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 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
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Landscapes
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は木片セメント板等の成形体の製造方法に関する
。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a molded article such as a wood chip cement board.
［従来の技術］
従来、建築用壁材料等として木片セメント板等の溝模様
を有する成形体が多用されている。[Prior Art] Conventionally, molded bodies having grooved patterns, such as wood cement boards, have been frequently used as wall materials for construction.
上記成形体は、例えば特開昭５８−１１４１１０７号公
報、特開昭６０−５４８０８号公報に記載されるように
、溝模様成形のための凹凸部を備えた型板の成形面上に
、セメントと木片フレークと水等とを混合した非流動性
材料を投入し、型板上の上記材料をプレス機にて圧縮す
ることにより成形されている。The above-mentioned molded body is placed on the molding surface of a molding plate having an uneven part for groove pattern molding, as described in, for example, JP-A-58-1141107 and JP-A-60-54808. A non-flowing material made of a mixture of wood flakes, water, etc. is added, and the material on the template is compressed using a press machine.
［発明が解決しようとする問題点］
しかしながら、上記従来の成形体の製造方法にあっては
、型板の全成形面上に上記材料を略均一な展開密度で展
開した後、プレス機にて圧縮している。このため、型板
の凹部に展開された材料（成形体の凸部を構成すること
となる部分）がプレス機にて加えられる圧縮率（圧縮前
の厚み／圧縮後の厚み）は小さく、型板の凸部に展開さ
れた材料（成形体の凹部を構成することとなる部分）が
プレス機にて加えられる圧縮率は大きくなる傾向にある
。[Problems to be Solved by the Invention] However, in the above-mentioned conventional method for producing a molded article, after the above-mentioned material is spread at a substantially uniform density on the entire molding surface of the template, the material is spread with a press machine. It's compressed. For this reason, the compression ratio (thickness before compression/thickness after compression) applied by the press to the material developed in the concave part of the template (the part that will constitute the convex part of the molded body) is small, and The compression rate applied by the press to the material spread on the convex portions of the plate (the portions that will form the concave portions of the molded body) tends to increase.
したがって、圧縮成形後の成形体の各部の圧密度１強度
をみると、成形体の凸部は成形時の圧縮率が小であった
ために低圧密度、低強度となり、成形体の凹部は成形時
の圧縮率が大であったために高圧密度、高強度となる傾
向を生じ、溝模様を有する成形体の強度を均一化するの
に困難がある。Therefore, when looking at the compaction density/strength of each part of the molded body after compression molding, the convex parts of the molded body have low compaction density and low strength because the compression rate during molding was small, and the concave parts of the molded body have low compaction density and strength during molding. Since the compression rate was high, there was a tendency for high compaction density and high strength, and it was difficult to equalize the strength of a molded article having a groove pattern.
また、成形体の凸部に高強度を確保しようとしてプレス
機の加圧力を増大化する場合には、成形体の凹部すなわ
ち型板の凸部における成形圧力が過大となる。すなわち
、プレス機が大型化したり、プレス機や型板に破損を招
来するおそれがある。Furthermore, when increasing the pressing force of the press in an attempt to ensure high strength in the convex portions of the molded body, the molding pressure at the concave portions of the molded body, that is, the convex portions of the template becomes excessive. That is, there is a risk that the press machine will become larger or that the press machine or template may be damaged.
本発明は、溝模様を有する成形体を、容易に均一な強度
にて成形可能とすることを目的とする。An object of the present invention is to enable a molded article having a groove pattern to be easily molded with uniform strength.
［問題点を解決するための手段］
本発明は、溝模様成形のための凹凸部を備えた型板の成
形面玉に非流動性材料を投入し、型板上の上記材料をプ
レス機にて圧縮することにより、溝模様を有する成形体
を成形する成形体の製造方法において、型板の全成形面
上に上記材料を略均一な展開密度で展開した後、上記材
料をプレス機にて予備圧縮し、予備圧縮後の材料の被加
圧面側 ′の全外層部を掻きならし、掻きならし後の
材料の全外層部上に新たな材料を略均一な展開密度で展
開した後、プレス機にて圧縮するようにしたものである
。[Means for Solving the Problems] The present invention involves putting a non-flowable material into the molding surface ball of a molding plate having uneven parts for molding a grooved pattern, and applying the above-mentioned material on the molding plate to a press machine. In a method for manufacturing a molded body in which a molded body having a groove pattern is formed by compressing it with After pre-compressing, smoothing the entire outer layer of the pressurized surface side of the material after pre-compressing, and spreading new material at a substantially uniform density on the entire outer layer of the smoothed material, It is compressed using a press machine.
［作用］ 本発明による成形体の製造方法は以下の如くである・。[Effect] The method for producing a molded article according to the present invention is as follows.
■型板の全成形面上に非流動性材料を略均一な展開密度
で展開する。■ Spread the non-flowable material on the entire molding surface of the template at a substantially uniform density.
■上記■の材料をプレス機にて予備圧縮する。■Preliminarily compress the material in (■) above using a press machine.
■予備圧縮後の材料の被加圧面側の全外層部を掻きなら
す。■Smooth the entire outer layer of the pressurized side of the material after pre-compression.
■掻きならし後の材料の全外層部上に新たな材料を略均
一な展開密度で展開する。■ Spread a new material on the entire outer layer of the material after leveling with a substantially uniform spreading density.
■プレス機にて圧縮成形する。■Mold by compression using a press machine.
なお、本発明の実施においては、上記■の前段階で、型
板上の材料が略均一な圧密度となるまで上記■〜■をく
り返すのがよい。In the practice of the present invention, it is preferable to repeat steps 1 to 3 above before step 1 above until the material on the template has a substantially uniform compaction density.
しかして、■型板の凸部に位置する材料（成形体の凹部
を構成することとなる部分）は予備圧縮にて他の部分（
型板の凹部）よりすでに圧密度が高く、予備圧縮力の除
去後に盛り上り傾向にあるものの１本発明によれば上記
圧密度の高い盛り上り部分が掻きならし除去された後、
プレス機にて本圧縮せしめられることとなる。また、■
予備圧縮後の材料の全外層部が掻きならされることから
、各部の材料厚みに対する材料除去量のなす比率は、材
料厚みの大きい凹部よりも材料厚みの小さい凸部におい
て大となり、前記圧密度の高い凸部の材料充填量が低減
せしめられた後、プレス機にて本圧縮せしめられること
となる。すなわち、■、■によれば、型板の凸部におけ
るプレス成形時の圧縮率増大化傾向が緩和され、結果と
して、プレス機が型板の四部、凸部の各部に加える圧縮
率が相互に略均等となる。Therefore, ■the material located in the convex part of the template (the part that will constitute the concave part of the molded body) is pre-compressed and the material located in the other part (
According to the present invention, after the bulging portion with high consolidation density is leveled and removed,
It will be fully compressed using a press machine. Also, ■
Since the entire outer layer of the material after pre-compression is leveled, the ratio of the amount of material removed to the material thickness of each part is larger in the convex parts where the material thickness is small than in the concave parts where the material thickness is large, and the consolidation rate is After the amount of material filled in the high convex portions is reduced, the material is subjected to main compression using a press machine. In other words, according to ■ and ■, the tendency for the compression ratio to increase during press forming at the convex portion of the template is alleviated, and as a result, the compression ratios applied by the press to the four parts of the template and each part of the convex part are mutually reduced. Almost equal.
このため、得られる成形体の圧密度ひいては強度が各部
で均一となり、また成形体の成形圧力が局所的に過大に
ならないからプレス機が大型化することがなく、プレス
機や型板に破損を生ずることもない、すなわち、溝模様
を有する成形体を、容易に均一な強度にて成形すること
ができる。For this reason, the compaction degree and hence the strength of the resulting molded body are uniform in each part, and the molding pressure of the molded body does not locally become excessive, so the press machine does not become large and there is no risk of damage to the press machine or template. In other words, a molded article having a groove pattern can be easily molded with uniform strength.
［実施例］
第１図は本発明の一実施例を示す模式図、第２図は本発
明の実施に用いられる材料供給設備の一例を示す模式図
、第３図は本発明の実施に用いられるプレス機の一例を
示す模式図である。[Example] Fig. 1 is a schematic diagram showing an example of the present invention, Fig. 2 is a schematic diagram showing an example of material supply equipment used in carrying out the present invention, and Fig. 3 is a schematic diagram showing an example of material supply equipment used in carrying out the present invention. FIG. 2 is a schematic diagram showing an example of a press machine.
本実施例は、溝模様を有する硬質木片セメント板（成形
体）を成形するものであり、材料供給設備１０により型
板ｌの成形面上に非流動性材料を投入しく第２図参照）
、プレス機２０により上記材料を圧縮、加熱成形しく第
３図参照）、成形体２を製造するようになっている。In this example, a hard wood cement board (molded body) having a groove pattern is formed, and a non-flowing material is introduced onto the forming surface of the template l using the material supply equipment 10 (see Fig. 2).
The above-mentioned material is compressed and heated by a press machine 20 (see FIG. 3) to produce a molded body 2.
ここで、型板１は溝模様成形のため凹部ＩＡ。Here, the template 1 has a concave portion IA for forming a groove pattern.
凸部ＩＢ、Ｉｃを備えている。凹部ＩＡは成形体２の凸
部となり、凸部ＩＢ、ＩＣは成形体２の凹部となる。It is provided with convex portions IB and Ic. The concave portion IA becomes a convex portion of the molded body 2, and the convex portions IB and IC become concave portions of the molded body 2.
また、成形体２の材料３は、硬化性材料としてのセメン
ト組成物と補強材料としての木片フレークと水等とを混
合して形成されている。なお、上記セメント組成物とし
ては、ポルトランドセメント、アルミナセメント、無水
石膏およびまたは半水石膏を含むものが好適である。Further, the material 3 of the molded body 2 is formed by mixing a cement composition as a curable material, wood flakes as a reinforcing material, water, and the like. In addition, as the above-mentioned cement composition, one containing Portland cement, alumina cement, anhydrite, and/or hemihydrate gypsum is suitable.
なお、材料供給設備ｌＯは、第２図に示す如く、型板ｌ
を搬送する型板コンベア１１の上方に設置され、前述の
各原料を所定割合で混合して材料を作るミキサ１２）材
料をミキサ１２から移載される供給コンベア１３、供給
コンベア１３にて送られる材料を定量化するスラットコ
ンベア１４と均しコンベア１５．定量化された材料を供
給コンベア１３から型板ｌの成形面上に散布状に展開し
て供給するブラシ１６にて構成される。In addition, the material supply equipment IO is equipped with a template lO as shown in FIG.
A mixer 12, which is installed above the template conveyor 11 that conveys the materials, mixes each of the above-mentioned raw materials in a predetermined ratio to produce the material; Slat conveyor 14 and leveling conveyor 15 for quantifying the material. It is composed of a brush 16 that spreads and supplies the quantified material from a supply conveyor 13 onto the molding surface of the template l.
この時、材料供給膜＠１０は、特開昭５８−１１４Ｈ７
号公報に記載される如く、微細な表面層材料を型板ｌの
成形面上に展開した後、粗い芯層材料を上記表面層材料
の上面に積層する如く展開するものであってもよい。At this time, the material supply film @10 is
As described in the above publication, after a fine surface layer material is spread on the molding surface of the template 1, a coarse core layer material may be spread so as to be laminated on the upper surface of the surface layer material.
また、プレス機２０は、第３図に示す如く、型板ｌ、型
板１の成形面上に展開された材料３、および型板１の下
面に添設される熱板４の３者を１組とし、その多数組を
上下のプレス部２１の間に積み重ねるようになっている
。これにより、材料３は、型板１の成形面上で加熱加圧
された後、常温放置されて硬化し、溝模様を有する成形
体２となる。Further, as shown in FIG. 3, the press machine 20 processes three parts: a mold plate 1, a material 3 developed on the molding surface of the mold plate 1, and a hot plate 4 attached to the lower surface of the mold plate 1. A large number of sets are stacked between the upper and lower press sections 21. Thereby, the material 3 is heated and pressurized on the molding surface of the template 1, and then left to stand at room temperature to harden, resulting in a molded body 2 having a groove pattern.
しかして、この実施例にあっては、型板１の成形面上へ
の材料３の投入形態を以下の如く調整した後、プレス機
２０による圧縮工程に供することとしている。Therefore, in this embodiment, after adjusting the manner in which the material 3 is introduced onto the molding surface of the template 1 as described below, the material 3 is subjected to the compression process using the press machine 20.
■まず、材料供給設備１０により、型板の金成形面上に
材料３を略均一な展開密度で展開する（第１図（Ａ）参
照）。(1) First, the material supply equipment 10 spreads the material 3 onto the metal molding surface of the template at a substantially uniform density (see FIG. 1(A)).
■次に、上記■の材料をプレス機２０にて予備圧縮する
（第１図（Ｂ）参照）。(2) Next, the material (2) is preliminarily compressed using a press 20 (see FIG. 1(B)).
■次に、予備圧縮後の材料の被加圧面側の全外層部をブ
ラシロール（掻きならし板でも可）３０により掻きなら
す（第１図（Ｃ）参照）。(2) Next, the entire outer layer of the pressurized surface of the pre-compressed material is leveled with a brush roll (a leveling board may also be used) 30 (see FIG. 1(C)).
■次に、掻きならし後の材料の全外層部上に新たな材料
を略均一な展開密度で展開する（第１図（Ｄ）参照）。(2) Next, a new material is spread on the entire outer layer of the material after being leveled at a substantially uniform spread density (see FIG. 1(D)).
■次に、プレスＪ７ｊ１２０にて圧縮成形する（第１図
（Ｅ）参照）。■Next, compression molding is performed using a press J7j120 (see FIG. 1(E)).
なお、本発明の実施においては、上記■の前段階で、型
板上の材料が略均一な圧密度となるまで上記■〜■をく
り返すのがよい。In the practice of the present invention, it is preferable to repeat steps 1 to 3 above before step 1 above until the material on the template has a substantially uniform compaction density.
しかして、■型板ｌの凸部ＩＢ、ＩＣに位置する材料（
成形体の凹部を構成することとなる部分）は予備圧縮に
て他の部分（型板ｌの凹部ｌＡ）よりすでに圧密度が高
く、予備圧縮力の除去後に盛り上り傾向にあるものの、
上記実施例によれば上記圧密度の高い盛り上り部分が掻
きならし除去された後、プレス機２０にて本圧縮せしめ
られることとなる。また、■予備圧縮後の材料の全外層
部が掻きならされることから、各部の材料厚みに対する
材料除去量のなす比率は、材料厚みの大きい四部ＩＡよ
りも材料厚みの小さい凸部ｌＢ、ＩＣにおいて大となり
、前記圧密度の高い凸部ＩＢ、ＩＣの材料充填量が低減
せしめられた後、プレス機２０にて本圧縮せしめられる
こととなる。すなわち、■、■によれば、型板ｌの凸部
ＩＢ、ＩＣにおけるプレス成形時の圧縮率増大化傾向が
緩和され、結果として、プレス機２０が型板１の凹部Ｉ
Ａ、凸部ＩＢ、ＩＣの各部に加える圧縮率が相互に略均
等となる。Therefore, ■the material located at the convex parts IB and IC of the template l (
Although the part (which will form the recess of the molded body) already has a higher degree of consolidation than other parts (the recess 1A of the template 1) during pre-compression, and after the pre-compression force is removed, it tends to bulge.
According to the above-mentioned embodiment, after the high-density raised portion is leveled and removed, it is subjected to main compression using the press machine 20. Also, since all the outer layers of the material after pre-compression are leveled, the ratio of the amount of material removed to the material thickness of each part is smaller than that of the convex parts IB and IC, which have a smaller material thickness, than the four parts IA, which have a larger material thickness. After the amount of material filled in the convex parts IB and IC with high compaction density is reduced, the main compression is performed in the press machine 20. That is, according to ■ and ■, the tendency for the compression ratio to increase during press molding in the convex portions IB and IC of the template l is alleviated, and as a result, the press machine 20 presses the concave portions IB and IC of the template l.
The compression ratios applied to each part of A, the convex portion IB, and the IC are approximately equal to each other.
このため、得られる成形体２の圧密度ひいては強度が各
部で均一となり、また成形体２の成形圧力が局所的に過
大にならないからプレス機２０が大型化することがなく
、プレス機２０や型板ｌに破損を生ずることもない、す
なわち、溝模様を有する成形体２を、容易に均一な強度
にて成形することができる。For this reason, the compaction degree and hence the strength of the obtained molded body 2 are uniform in each part, and since the molding pressure of the molded body 2 does not locally become excessive, the press machine 20 does not become large, and the press machine 20 and mold In other words, the molded body 2 having a groove pattern can be easily molded with uniform strength without causing damage to the plate 1.
なお、本発明の実施においては、第１図（Ｅ）の如くの
均一圧密度の成形体を得た後、該成形体のさらに外層部
上に一定厚みの芯層材を展開、圧縮成形することにて付
加してもよい。In the practice of the present invention, after obtaining a molded body with a uniform compaction density as shown in FIG. It may also be added.
［発明の効果］
以上のように、本発明によれば、溝模様を有する成形体
を、容易に均一な強度にて成形することができる。[Effects of the Invention] As described above, according to the present invention, a molded article having a groove pattern can be easily molded with uniform strength.
第１図は本発明の一実施例を示す模式図、第２図は本発
明の実施に用いられる材料供給設備の一例を示す模式図
、第３図は本発明の実施に用いられるプレス機の一例を
示す模式図である。
１・・・型板、
ｌＡ・・・凹部、
１Ｂ、ＩＣ・・・凸部、
２・・・成形体、
３・・・材料、
２０・・・プレス機。
第１ 図Fig. 1 is a schematic diagram showing an embodiment of the present invention, Fig. 2 is a schematic diagram showing an example of material supply equipment used in the practice of the present invention, and Fig. 3 is a schematic diagram showing an example of the material supply equipment used in the practice of the present invention. It is a schematic diagram showing an example. DESCRIPTION OF SYMBOLS 1... Template, lA... Recessed part, 1B, IC... Convex part, 2... Molded object, 3... Material, 20... Press machine. Figure 1
Claims (3)
上に非流動性材料を投入し、型板上の上記材料をプレス
機にて圧縮することにより、溝模様を有する成形体を成
形する成形体の製造方法において、型板の全成形面上に
上記材料を略均一な展開密度で展開した後、上記材料を
プレス機にて予備圧縮し、予備圧縮後の材料の被加圧面
側の全外層部を掻きならし、掻きならし後の材料の全外
層部上に新たな材料を略均一な展開密度で展開した後、
プレス機にて圧縮することを特徴とする成形体の製造方
法。(1) A non-flowable material is placed on the molding surface of a template with uneven parts for molding a groove pattern, and the material on the template is compressed using a press machine to form a groove pattern. In a method for manufacturing a molded body, the material is spread on the entire molding surface of a template at a substantially uniform density, and then the material is pre-compressed in a press, and the material is covered with the pre-compressed material. After smoothing out the entire outer layer on the pressure side and spreading new material at a substantially uniform density on the entire outer layer of the smoothed material,
A method for producing a molded body, characterized by compressing it using a press machine.
硬化性材料と補強材料との混合物である成形体の製造方
法。(2) A method for manufacturing a molded article according to claim 1, wherein the non-flowable material is a mixture of a curable material and a reinforcing material.
メント組成物であり、補強材料が木片フレークである成
形体の製造方法。(3) The method for producing a molded article according to claim 2, wherein the curable material is a cement composition and the reinforcing material is wood flakes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62321962A JPH0757487B2 (en) | 1987-12-18 | 1987-12-18 | Molded body manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62321962A JPH0757487B2 (en) | 1987-12-18 | 1987-12-18 | Molded body manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01160607A true JPH01160607A (en) | 1989-06-23 |
| JPH0757487B2 JPH0757487B2 (en) | 1995-06-21 |
Family
ID=18138371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62321962A Expired - Fee Related JPH0757487B2 (en) | 1987-12-18 | 1987-12-18 | Molded body manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0757487B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009241479A (en) * | 2008-03-31 | 2009-10-22 | Nichiha Corp | Production method of wood cement board |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5874305A (en) * | 1981-10-30 | 1983-05-04 | 千代田技研工業株式会社 | Instantaneous mold-release molding method for concrete product and its mold |
-
1987
- 1987-12-18 JP JP62321962A patent/JPH0757487B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5874305A (en) * | 1981-10-30 | 1983-05-04 | 千代田技研工業株式会社 | Instantaneous mold-release molding method for concrete product and its mold |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009241479A (en) * | 2008-03-31 | 2009-10-22 | Nichiha Corp | Production method of wood cement board |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0757487B2 (en) | 1995-06-21 |
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