JPH06147952A - Volume measuring method for molded article - Google Patents
Volume measuring method for molded articleInfo
- Publication number
- JPH06147952A JPH06147952A JP30091792A JP30091792A JPH06147952A JP H06147952 A JPH06147952 A JP H06147952A JP 30091792 A JP30091792 A JP 30091792A JP 30091792 A JP30091792 A JP 30091792A JP H06147952 A JPH06147952 A JP H06147952A
- Authority
- JP
- Japan
- Prior art keywords
- volume
- molded product
- molded article
- weight
- water
- 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
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば複雑な形状を有
する成形品等の体積を正確に、かつ容易に測定できる成
形品の体積測定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 a method for measuring the volume of a molded product which can accurately and easily measure the volume of a molded product having a complicated shape.
【０００２】[0002]
【従来の技術】例えばポリスチレン、ポリエチレン、ポ
リプロピレン等からなる発泡成形品を製造する際、その
成形後の体積を測定することにより、予備発泡粒子から
の発泡倍率を換算することができる。このような成形品
の体積測定は、発泡倍数の制御や、発泡成形品の品質管
理等において必要とされている。2. Description of the Related Art For example, when a foam-molded article made of polystyrene, polyethylene, polypropylene or the like is manufactured, the expansion ratio from the pre-expanded particles can be converted by measuring the volume after molding. The volume measurement of such a molded product is required for controlling the expansion ratio, quality control of the foamed molded product, and the like.
【０００３】成形品の体積を測定する際、直方体等の単
純な形状のものであれば、各辺の長さから計算により容
易に体積を求めることができる。一方、成形品に溝等が
形成され、形状が複雑になると、体積を求める計算も複
雑になるため、非常に面倒である。When measuring the volume of a molded product, if it has a simple shape such as a rectangular parallelepiped, the volume can be easily obtained by calculation from the length of each side. On the other hand, if a groove or the like is formed in the molded product and the shape becomes complicated, the calculation of the volume becomes complicated, which is very troublesome.
【０００４】そこで、従来では、図３に示すような測定
装置１１を用いて、成形品の体積を測定している。すな
わち、所定量の水を入れた水槽１２の中に、被測定物で
ある成形品１３を沈め、水位の変化ａを読み取ることに
より、この水位変化ａと水槽１２の底面積とを基に体積
を換算している。Therefore, conventionally, the volume of the molded product is measured by using a measuring device 11 as shown in FIG. That is, by submerging the molded article 13, which is the object to be measured, in the water tank 12 containing a predetermined amount of water and reading the water level change a, the volume based on the water level change a and the bottom area of the water tank 12 is measured. Is being converted.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記の
方法では、目視により水位変化ａを読み取っているの
で、水の表面張力等により、目盛りが読みづらく、個人
差による測定値のバラツキも生じるため、測定誤差が大
きくなるという問題が生じている。However, in the above method, since the water level change a is visually read, the scale is difficult to read due to the surface tension of water, etc., and variations in measured values due to individual differences occur. There is a problem that the measurement error becomes large.
【０００６】本発明は、上記従来の問題点に鑑みなされ
たものであって、面倒な計算等を要することなく、容易
に体積を測定できると共に、測定誤差を減少してより正
確な体積の測定値を求めることができる方法を提供する
ことを目的としている。The present invention has been made in view of the above-mentioned problems of the prior art, and it is possible to easily measure the volume without requiring troublesome calculation, and to reduce the measurement error to measure the volume more accurately. The aim is to provide a method by which the value can be determined.
【０００７】[0007]
【課題を解決するための手段】本発明の成形品の体積測
定方法は、上記の課題を解決するため、被測定物である
成形品を水に浮かべ、成形品を水面下に押さえ込む際に
必要な力を重量として測定すると共に、測定した重量に
成形品自身の重量を加算し、加算して得られた重量から
成形品の体積を求めることを特徴としている。In order to solve the above-mentioned problems, the method for measuring the volume of a molded article according to the present invention is necessary when the molded article which is the object to be measured is floated on water and the molded article is pressed below the water surface. In addition to measuring the force as a weight, the weight of the molded product itself is added to the measured weight, and the volume of the molded product is determined from the weight obtained by the addition.
【０００８】[0008]
【作用】上記の方法によれば、形状の複雑な成形品であ
っても、成形品を水面下に押さえ込む際に要する力を重
量として測定し、測定した重量に成形品自身の重量を加
算するだけで、成形品の体積を容易に、かつより正確に
求めることが可能になる。According to the above method, even if the molded product has a complicated shape, the force required to press the molded product under the water surface is measured as a weight, and the weight of the molded product itself is added to the measured weight. Only then, the volume of the molded product can be obtained easily and more accurately.
【０００９】つまり、成形品を水に浮かべると、力を加
えなくても、成形品自身の重量により、その一部分が水
面下に位置することになる。このような状態で、成形品
を水面下に押さえ込むと、成形品における水面に浮上し
ていた部分と同体積の水が押し退けられ、水位が上昇す
ることになる。水の密度は約１ｇ／cm3 であるので、成
形品を水面下に押さえ込むために必要な力を重量として
測定することにより、水面下に押さえ込まれた成形品の
体積が求められる。さらに、成形品を水面下に押さえ込
む際に測定した重量に、力を加えなくてもその自重によ
り水面下に位置する部分の体積として、成形品自身の重
量を加算し、加算して得られた重量の単位を置き換える
ことにより、成形品全体の体積を求めることができる。That is, when the molded product is floated on water, a part of the molded product is positioned below the surface of the water due to the weight of the molded product itself without applying force. When the molded product is pressed below the water surface in such a state, the same volume of water as that of the portion of the molded product that was floating on the water surface is pushed away, and the water level rises. Since the density of water is about 1 g / cm 3 , the volume of the molded product pressed below the water surface can be determined by measuring the force required to press the molded product below the water surface as the weight. Furthermore, the weight of the molded product itself was added to the weight measured when the molded product was pressed below the water surface, as the volume of the portion located below the water surface due to its own weight without applying force, and was obtained by addition. By replacing the unit of weight, the volume of the entire molded product can be obtained.
【００１０】これにより、複雑な形状を有する成形品の
体積を求める際に、面倒な計算が不要になるだけでな
く、前記従来のように、成形品を水面下に沈めたときの
水位変化を目視により読み取る場合と比較して、個人差
による測定値のバラツキが減少し、測定誤差を小さくす
ることができる。また、例えばデジタル式の自動秤等を
用いて、上記の重量測定を行うことにより、成形品の体
積を測定する際の煩雑な手間を省くことができると共
に、より正確な測定値を求めることが可能になる。This not only eliminates the need for tedious calculation when determining the volume of a molded product having a complicated shape, but also changes the water level when the molded product is submerged as in the conventional case. As compared with the case of visually reading, the variation of the measurement value due to individual difference is reduced, and the measurement error can be reduced. Further, for example, by using a digital automatic balance or the like, by performing the above-mentioned weight measurement, it is possible to save the troublesome time at the time of measuring the volume of the molded product, and to obtain a more accurate measurement value. It will be possible.
【００１１】[0011]
【実施例】本発明の一実施例について図１及び図２に基
づいて説明すれば、以下の通りである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The following will describe one embodiment of the present invention with reference to FIGS.
【００１２】本実施例では、図２に示すような測定装置
を用いて、例えばポリスチレン、ポリエチレン、ポリプ
ロピレン等から成る発泡成形品の体積を測定する場合に
ついて説明する。In this embodiment, a case will be described in which the volume of a foam-molded article made of, for example, polystyrene, polyethylene, polypropylene or the like is measured using a measuring device as shown in FIG.
【００１３】上記の測定装置は、水槽１、デジタル自動
秤２、及び成形品を水槽１の水面下に押さえ込むための
押し込み装置３を有している。この押し込み装置３は、
上下方向に伸縮自在なアーム３ａを備えており、アーム
３ａの先端部には、成形品４に当接する押さえ部材３ｂ
が取り付けられている。また、デジタル自動秤２は、秤
量した重量をデジタル表示する表示部２ａと、電源のＯ
Ｎ／ＯＦＦ、リセット等を指示するための操作キー２ｂ
…と、水槽１が載置される載置台２ｃとを備えている。
また、上記の水槽１の大きさ及びその中に注入する水の
量は、特に限定されるものではなく、被測定物である成
形品の大きさ、形状等に応じて、適宜選択すれば良い。The above-mentioned measuring device has a water tank 1, a digital automatic scale 2, and a pushing device 3 for pressing a molded product below the water surface of the water tank 1. This pushing device 3
A vertically movable arm 3a is provided, and a pressing member 3b that abuts the molded product 4 is provided at the tip of the arm 3a.
Is attached. Further, the digital automatic balance 2 has a display unit 2a for digitally displaying the weighed weight and an O of the power source.
Operation key 2b for instructing N / OFF, reset, etc.
, And a mounting table 2c on which the water tank 1 is mounted.
The size of the water tank 1 and the amount of water to be injected therein are not particularly limited, and may be appropriately selected according to the size, shape, etc. of the molded article as the measured object. .
【００１４】この測定装置を用いて成形品４の体積を測
定する方法を説明すると、まず、デジタル自動秤２の載
置台２ｃに水槽１を載せ、任意の量の水を入れる。そし
て、押し込み装置３のアーム３ａを水槽１の上方に位置
させた状態で、被測定物である成形品４を水面に浮か
べ、デジタル自動秤２を「０」にリセットする。次に、
押し込み装置３のアーム３ａを下降させ、図１に示すよ
うに、押さえ部材３ｂにより、成形品４を水面ぎりぎり
まで押し込む。このとき、成形品４の形状によっては、
成形品４がエアーを伴って押し込まれることがあるの
で、エアー溜まりのエアーを抜くために、押し込み装置
３の押さえ部材３ｂは、成形品４を傾けたり、成形品４
に振動を与えたりできるように取り付けられている。A method of measuring the volume of the molded product 4 using this measuring apparatus will be described. First, the water tank 1 is placed on the mounting table 2c of the digital automatic balance 2 and an arbitrary amount of water is put therein. Then, in a state where the arm 3a of the pushing device 3 is positioned above the water tank 1, the molded product 4 as the measured object is floated on the water surface, and the digital automatic balance 2 is reset to "0". next,
The arm 3a of the pushing device 3 is lowered, and as shown in FIG. 1, the pressing member 3b pushes the molded product 4 to the limit of the water surface. At this time, depending on the shape of the molded product 4,
Since the molded product 4 may be pushed in with air, the pressing member 3b of the pushing device 3 tilts the molded product 4 or pushes the molded product 4 in order to remove air from the air pool.
It is attached so that it can be vibrated.
【００１５】そして、上記エアー溜まりのエアーを抜い
た後、成形品４を水槽１の水面ぎりぎりまで押さえ込ん
だときの、デジタル自動秤２の表示部２ａに表示された
重量を読み取る。つまり、成形品４を水面下に押さえ込
むと、この成形品４において水面に浮上していた部分と
同体積の水を押し退ける力が必要となり、デジタル自動
秤２の表示部２ａには、このときに必要な力が重量とし
て表示される。Then, after bleeding air from the air reservoir, the weight displayed on the display portion 2a of the digital automatic balance 2 when the molded product 4 is pressed to the water surface of the water tank 1 is read. That is, when the molded product 4 is pressed below the surface of water, a force for pushing away the same volume of water as the part of the molded product 4 that has floated above the water surface is required. The required force is displayed as weight.
【００１６】また、実際には、上記のように成形品４を
水面に浮かべた状態では、成形品４の重量に応じて水が
押し退けられることにより、押し退けられた水の体積に
相当する成形品４の一部が水面よりも下に位置すること
になる。したがって、成形品４の体積を求めるには、成
形品４を押さえ込む際に測定された重量に、予め測定し
ておいた成形品４の重量を加える必要がある。In practice, when the molded article 4 is floated on the water surface as described above, the water is pushed away according to the weight of the molded article 4, so that the molded article corresponding to the volume of the pushed-off water. Part 4 will be located below the water surface. Therefore, in order to obtain the volume of the molded product 4, it is necessary to add the previously measured weight of the molded product 4 to the weight measured when the molded product 4 is pressed.
【００１７】そして、上記のようにして得られた重量の
合計が例えば3.４８５ｇであれば、水の密度が約１ｇ／
cm3 であるので、成形品４の体積は、3.４８５cm3 とな
る。When the total weight obtained as described above is, for example, 3.485 g, the density of water is about 1 g /
Since in cm 3, the volume of the molded article 4 is a 3.485cm 3.
【００１８】上記の測定方法により得られた成形品の体
積を、計算により求めた体積と比較するため、直方体形
状で、発泡倍率が高倍率のサンプルＡ・Ｂと、低倍率の
サンプルＣ・Ｄとをそれぞれ２種類ずつ計４種類用意
し、ビーカーを用いて実際に体積の測定を行った。表１
及び表２にそれぞれの測定結果を示すと共に、測定値と
比較するため、各辺の長さから計算により求めたサンプ
ルの体積を示す。In order to compare the volume of the molded product obtained by the above measurement method with the volume obtained by calculation, in the rectangular parallelepiped shape, samples A and B with a high expansion ratio and samples C and D with a low expansion ratio A total of 4 types of 2 types and 2 types of were prepared and the volume was actually measured using a beaker. Table 1
Table 2 shows the respective measurement results, and also shows the volume of the sample calculated from the length of each side for comparison with the measured value.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【表２】 [Table 2]
【００２１】上記の表１及び表２から明らかなように、
本実施例の測定方法によれば、体積の計算値と比べて、
比較的誤差の少ない体積を容易に求めることが可能であ
った。したがって、上記の方法を用いることにより、複
雑な形状を有する成形品の体積を測定する場合でも、面
倒な計算が不要になるだけでなく、前記従来のように、
水位の上昇を目測することにより、体積を求める場合と
比較して、誤差の少ないより正確な体積を求めることが
可能になる。As is clear from Tables 1 and 2 above,
According to the measuring method of this example, compared with the calculated value of the volume,
It was possible to easily obtain a volume with a relatively small error. Therefore, by using the method described above, even when measuring the volume of a molded product having a complicated shape, not only does the need for tedious calculations, as in the conventional,
By visually measuring the rise of the water level, it is possible to obtain a more accurate volume with less error compared to the case of obtaining the volume.
【００２２】また、重量を測定する手段として、本実施
例のように、デジタル自動秤を用いることにより、煩雑
な手間を省くことが可能になり、計算を自動的に行うこ
とができると共に、測定誤差を減少して、より正確な測
定値を得ることが可能になる。Further, by using a digital automatic balance as a means for measuring the weight as in the present embodiment, it is possible to save the troublesome work, and it is possible to automatically perform the calculation and to perform the measurement. It is possible to reduce the error and obtain a more accurate measurement value.
【００２３】[0023]
【発明の効果】本発明の成形品の体積測定方法は、以上
のように、被測定物である成形品を水に浮かべ、成形品
を水面下に押さえ込む際に必要な力を重量として測定す
ると共に、測定した重量に成形品自身の重量を加算し、
加算して得られた重量から成形品の体積を求めるもので
ある。As described above, the method for measuring the volume of a molded article according to the present invention measures the force necessary for floating the molded article as the object to be measured in water and pressing the molded article below the surface of the water as the weight. At the same time, add the weight of the molded product itself to the measured weight,
The volume of the molded product is obtained from the weight obtained by the addition.
【００２４】それゆえ、複雑な形状を有する成形品であ
っても、面倒な計算等を要することなく、容易に体積の
測定を行うことができると共に、測定誤差の小さい、よ
り正確な測定値を得ることが可能になるという効果を奏
する。Therefore, even if the molded product has a complicated shape, it is possible to easily measure the volume without complicated calculation, and to obtain a more accurate measured value with a small measurement error. There is an effect that it becomes possible to obtain.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の一実施例における成形品の体積測定方
法において、成形品を水面下に押さえ込んだ状態を示す
模式図である。FIG. 1 is a schematic view showing a state in which a molded product is pressed below the water surface in a method for measuring a molded product volume according to an embodiment of the present invention.
【図２】上記の測定方法において、成形品を水面に浮か
べた状態を示す模式図である。FIG. 2 is a schematic view showing a state where a molded product is floated on the water surface in the above measuring method.
【図３】従来の成形品の体積測定方法を説明するための
模式図である。FIG. 3 is a schematic diagram for explaining a conventional method for measuring the volume of a molded product.
１ 水槽 ２ デジタル自動秤 ３ 押し込み装置 ４ 成形品 1 Water tank 2 Digital automatic scale 3 Pushing device 4 Molded product
Claims (1)
品を水面下に押さえ込む際に必要な力を重量として測定
すると共に、測定した重量に成形品自身の重量を加算
し、加算して得られた重量から成形品の体積を求めるこ
とを特徴とする成形品の体積測定方法。1. A molded article which is an object to be measured is floated on water, and the force required for pressing the molded article below the surface of the water is measured as a weight, and the weight of the molded article itself is added to the measured weight and added. A method for measuring the volume of a molded article, characterized in that the volume of the molded article is obtained from the weight obtained by
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30091792A JPH06147952A (en) | 1992-11-11 | 1992-11-11 | Volume measuring method for molded article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30091792A JPH06147952A (en) | 1992-11-11 | 1992-11-11 | Volume measuring method for molded article |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06147952A true JPH06147952A (en) | 1994-05-27 |
Family
ID=17890690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30091792A Pending JPH06147952A (en) | 1992-11-11 | 1992-11-11 | Volume measuring method for molded article |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06147952A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017030054A (en) * | 2015-07-28 | 2017-02-09 | ファナック株式会社 | Electric discharge machine with function to automatically calculate workpiece weight |
| CN106500953A (en) * | 2016-12-13 | 2017-03-15 | 中国空气动力研究与发展中心计算空气动力研究所 | A kind of icing volume measuring method |
| RU2771881C1 (en) * | 2021-06-08 | 2022-05-13 | Федеральное государственное унитарное предприятие "Центральный ордена Трудового Красного Знамени научно-исследовательский автомобильный и автомоторный институт "НАМИ" (ФГУП "НАМИ") | Method for accurately determining the volume of intricate-shaped cavities |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5856924B2 (en) * | 1976-06-10 | 1983-12-17 | 株式会社日立製作所 | Fluid spray type sheath disconnector |
-
1992
- 1992-11-11 JP JP30091792A patent/JPH06147952A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5856924B2 (en) * | 1976-06-10 | 1983-12-17 | 株式会社日立製作所 | Fluid spray type sheath disconnector |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017030054A (en) * | 2015-07-28 | 2017-02-09 | ファナック株式会社 | Electric discharge machine with function to automatically calculate workpiece weight |
| US10180344B2 (en) | 2015-07-28 | 2019-01-15 | Fanuc Corporation | Electric discharge machine |
| CN106500953A (en) * | 2016-12-13 | 2017-03-15 | 中国空气动力研究与发展中心计算空气动力研究所 | A kind of icing volume measuring method |
| RU2771881C1 (en) * | 2021-06-08 | 2022-05-13 | Федеральное государственное унитарное предприятие "Центральный ордена Трудового Красного Знамени научно-исследовательский автомобильный и автомоторный институт "НАМИ" (ФГУП "НАМИ") | Method for accurately determining the volume of intricate-shaped cavities |
| RU2781463C1 (en) * | 2021-06-08 | 2022-10-12 | Федеральное государственное унитарное предприятие "Центральный ордена Трудового Красного Знамени научно-исследовательский автомобильный и автомоторный институт "НАМИ" (ФГУП "НАМИ") | Set of tools for measuring chamber volumes in hollow products |
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