JPS634774B2 - - Google Patents
Info
- Publication number
- JPS634774B2 JPS634774B2 JP12186382A JP12186382A JPS634774B2 JP S634774 B2 JPS634774 B2 JP S634774B2 JP 12186382 A JP12186382 A JP 12186382A JP 12186382 A JP12186382 A JP 12186382A JP S634774 B2 JPS634774 B2 JP S634774B2
- Authority
- JP
- Japan
- Prior art keywords
- molding
- irregularly shaped
- packing
- shaped packing
- mold
- 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.)
- Expired
Links
- 238000012856 packing Methods 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 14
- 239000006260 foam Substances 0.000 claims description 9
- 239000006261 foam material Substances 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000002023 wood Substances 0.000 claims 1
- 238000000465 moulding Methods 0.000 description 31
- 230000010355 oscillation Effects 0.000 description 10
- 238000005187 foaming Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000004023 plastic welding Methods 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は異形パツキングの製造手段として超音
波溶着技術を発展させた画期的な成形方法の提供
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the provision of an epoch-making molding method that develops ultrasonic welding technology as a means for producing irregularly shaped packing.
例えば容器のシール部分に使用する発泡材製パ
ツキングの用途等には、第１図、第２図に示すよ
うな異形パツキングの使用価値が高まりつつある
（実公昭55−27572号公報参照）。すなわち、これ
らの異形パツキングでは、従来の扁平板状のもの
とは形状を異にし、中央部１には平坦部を形成す
る一方、その周縁部２には隆起部を形成し、かつ
両者の連なる部分に段部３を有してなるものであ
る。なおこの異形パツキングにおいても、そのシ
ール面に当る面には適宜保護フイルムをラミネー
トして構成されるのが普通である。 For example, the value of irregularly shaped packing as shown in FIGS. 1 and 2 is increasing for foam packing used for sealing parts of containers (see Japanese Utility Model Publication No. 55-27572). In other words, these irregularly shaped packings have a different shape from the conventional flat plate-like packing, in which a flat part is formed in the center part 1, and a raised part is formed in the peripheral part 2. It has a stepped portion 3 at a portion. It should be noted that even in this irregularly shaped packing, a protective film is usually laminated on the surface that corresponds to the sealing surface.
ところで、かかる発泡材製の異形パツキングを
成形するための手段として、従来の方法によれば
熱又は真空成形法によることが考えられる。しか
るに、実施結果によると、上記異形パツキングで
はその段部３に鋭角の断面の部分があるため、こ
の部分で所望の形状状態に成形するのが困難であ
つた。 By the way, as a means for molding such irregularly shaped packing made of foam material, according to conventional methods, it is possible to use heat or vacuum molding. However, according to the actual results, since the stepped portion 3 of the irregularly shaped packing has an acute-angled cross section, it was difficult to form it into a desired shape at this portion.
この成形不良の原因について検討すると、従来
の成形方法では、その成形後の冷却方法に問題が
あることが判つた。これは、上記いずれの方法に
しても素材パツキング及び成形治具を加熱してお
き、素材パツキングの良好な熱可塑性状態の下に
成形するものであるが、成形後の冷却方法が不備
のため、即ち成形後においてパツキングの加熱状
態が短時間であるが一定時間保持されるため、元
の形状に復元したり、せつかく成形した部分がダ
レてしまう等の二次変形を不可避に生ずるためで
ある。 When examining the cause of this molding defect, it was found that in the conventional molding method, there was a problem with the cooling method after molding. This is because, in any of the above methods, the material packing and the molding jig are heated and the material packing is molded in a good thermoplastic state, but the cooling method after molding is inadequate. In other words, after molding, the heating state of the packing is maintained for a short period of time, which inevitably causes secondary deformation such as restoration to the original shape or sagging of the carefully molded parts. .
また従来成形方法による問題点として、いずれ
にしても熱を加えて行うため、成形中に発泡材に
二次発泡現象を生じ、成形後パツキング表面に凹
凸を生じやすい問題点もある。 Further, as a problem with the conventional molding method, since heat is applied in any case, a secondary foaming phenomenon occurs in the foamed material during molding, which tends to cause unevenness on the packing surface after molding.
以上のような事情から、所期目的とする発泡材
製の異形パツキングを得るための手段として、従
来その好適な成形方法は見当らない。 Due to the above-mentioned circumstances, no suitable molding method has been found to date as a means for obtaining the desired irregularly shaped packing made of foam material.
しかして、本発明は種々分野で今度ますますそ
の有用性が高まると思われるこの種異形パツキン
グの好適な成形手段を確立する目的でなされたも
のである。 Therefore, the present invention was made with the object of establishing a suitable means for forming this type of irregularly shaped packing, which is expected to become increasingly useful in various fields.
すなわち、本発明はこの種異形パツキングの成
形方法として、発泡材シート６を金型５と発振ダ
イ４との間で全域に亘つて密着状に挟着さしめて
該発振ダイ４を超音波発振させることにより、周
縁部２に隆起部を有する発泡材製の異形パツキン
グ７を超音波成形することを特徴としている。 That is, the present invention provides a molding method for this type of irregularly shaped packing, in which a foam sheet 6 is tightly sandwiched between a mold 5 and an oscillating die 4 over the entire area, and the oscillating die 4 is caused to oscillate ultrasonic waves. As a result, the irregularly shaped packing 7 made of a foam material having a raised portion on the peripheral edge 2 is formed by ultrasonic molding.
従来プラスチツクフイルム、シート等の溶着、
溶断作業等に超音波溶着技術が活用されているこ
とは周知の通りであるが、本発明はこの超音波溶
着機を発泡材シートの成形に応用したものであ
る。すなわち、この超音波溶着方法によれば、そ
の発振時間を任意に調整することができ、一方金
型及び発振ダイは何ら加熱を要しないものである
から、成形にさいしその加熱及び冷却時間を自由
にコントロールすることができる。従つて、その
成形条件を適正化することによりこの種異形パツ
キングの成形における上記述べたような不良発生
原因を除去することができる訳である。なお、超
音波溶着技術を発泡材シートの成形に利用するこ
とは勿論本発明が嚆矢とするものである。 Conventional welding of plastic films, sheets, etc.
It is well known that ultrasonic welding technology is used for fusing operations, etc., and the present invention applies this ultrasonic welding machine to molding foam sheets. That is, according to this ultrasonic welding method, the oscillation time can be adjusted arbitrarily, and since the mold and oscillation die do not require any heating, the heating and cooling times can be freely adjusted during molding. can be controlled. Therefore, by optimizing the molding conditions, it is possible to eliminate the above-mentioned causes of defects in the molding of this type of irregularly shaped packing. It should be noted that the present invention is of course the first to utilize ultrasonic welding technology for molding a foamed material sheet.
次に第１図に示した異形パツキングを成形する
場合を例に、本発明の成形工程を述べる。第３
図、第４図において、４と５は各々目的異形パツ
キングの形状に対応して成形された発振ダイと金
型を示す。しかして、まず第３図の如く素材発泡
材シート６を金型５の上に所定位置にセツトし、
次いで発振ダイ４を降下し金型５内面と発振ダイ
４とにより第４図の如くシート６を挾着し、金型
５の内面形状に対応した目的形状の異形パツキン
グ７に形成する。このさいシート６の挾着成形と
同時に瞬時超音波を発振せしめてシート６に加熱
作用を付与する。その後発振を中止した状態でそ
の挾着状態を保持する。 Next, the molding process of the present invention will be described using as an example the case of molding the irregularly shaped packing shown in FIG. Third
4, numerals 4 and 5 indicate an oscillating die and a metal mold, respectively, which are molded to correspond to the shape of the intended irregularly shaped packing. First, as shown in FIG. 3, the foam material sheet 6 is set in a predetermined position on the mold 5, and
Next, the oscillating die 4 is lowered, and the sheet 6 is clamped between the inner surface of the mold 5 and the oscillating die 4 as shown in FIG. 4, and is formed into an irregularly shaped packing 7 having a target shape corresponding to the inner surface shape of the mold 5. At this time, at the same time as the sheet 6 is clamped and formed, instantaneous ultrasonic waves are oscillated to impart a heating effect to the sheet 6. Thereafter, the clamped state is maintained with the oscillation stopped.
このような成形方法によれば、シート６は成形
開始と同時に加熱されて金型内面に沿つて忠実に
成形されると共に、成形された異形パツキング７
はその瞬時の発振解除後における保持時間内に金
型５と発振ダイ４との間で急速に冷却完了し、金
型５と発振ダイ４との間から取出した後において
も従来のように二次変形を惹起することなくその
美麗かつ良好な成形状態のままに維持される。 According to such a molding method, the sheet 6 is heated at the same time as the molding starts, and is molded faithfully along the inner surface of the mold, and the molded irregularly shaped packing 7
is rapidly cooled down between the mold 5 and the oscillating die 4 within the holding time after the instantaneous oscillation is canceled, and even after being taken out from between the mold 5 and the oscillating die 4, the cooling does not occur as in the conventional case. The beautiful and well-molded state is maintained without causing subsequent deformation.
なお上記成形工程においては、予め発泡材シー
ト６に必要な保護フイルムを重ね合わたてセツト
しておけば、このフイルムのラミネートと成形と
が同時になし得る。 In the above-mentioned molding process, if a necessary protective film is set on the foamed material sheet 6 in advance, lamination and molding of the film can be performed at the same time.
次に具体的適用条件等について述べる。まず素
材の発泡材シートとしては、ポリエチレン系等熱
可塑性を有するものが種々適用できる。またその
発泡倍率についても種々の範囲のものが利用でき
るが、実施結果によると、一般に発泡倍率の低い
ものの方が良好である。そして、最も成形性に優
れるものは、発泡剤を利用して発泡させたものよ
りも、エアーにより発泡させたものが好結果が得
られることが判つた。ちなみに、発泡倍率は５倍
程度が限度で、それ以上では成形困難となる。 Next, we will discuss specific application conditions. First, as the foam sheet material, various thermoplastic materials such as polyethylene can be used. Moreover, various ranges of foaming ratios can be used, but according to practical results, those with lower foaming ratios are generally better. It was also found that the most excellent moldability was obtained by foaming with air than by foaming with a foaming agent. Incidentally, the expansion ratio is limited to about 5 times, and if it exceeds that, molding becomes difficult.
一方、その表面にラミネートする保護フイルム
については、上記ポリエチレン系のものよりは、
ポリエチレンテルフタレート系等更に熱変形温度
の高い素材を利用した方がより復元の防止に効果
的であることが判つた。 On the other hand, the protective film laminated on the surface is better than the polyethylene type mentioned above.
It has been found that using a material with a higher heat deformation temperature, such as polyethylene terphthalate, is more effective in preventing restoration.
また成形し得るパツキン厚の範囲については、
この種異形パツキングの使用用途で必要な範囲を
充分確保できる適用性があることが判つた。すな
わち、一般的には0.5〜10mmの範囲に亘つて適用
可能である。0.5mm以下では、しわを発生する頻
度大であり、10mm以上では、復元性が大となる傾
向がある。 Regarding the range of packing thickness that can be molded,
It has been found that this type of irregularly shaped packing has applicability that can sufficiently secure the necessary range of uses. That is, it is generally applicable over a range of 0.5 to 10 mm. When the thickness is 0.5 mm or less, wrinkles occur more frequently, and when the thickness is 10 mm or more, the restorability tends to be high.
今一例として、２mm厚のパツキングを超音波成
形する場合の標準条件を掲げれば、下記の通りで
ある。 As an example, the standard conditions for ultrasonic molding of 2 mm thick packing are as follows.
発振時間 0.3〜1.0sec 冷却時間（ホールドタイム） 0.3〜2sec 但し、振巾は高振巾を使用する。Oscillation time 0.3~1.0sec Cooling time (hold time) 0.3~2sec However, use a high swing width.
以上に述べた通り、本発明は発泡材製の異形パ
ツキングを得るにさいし、これを超音波成形する
画期的方法を案出したものであつて、これにより
従来成形方法の欠点を克服でき、種々の異形パツ
キングをその目的形状通り簡単かつ確実に成形す
ることができる。 As described above, the present invention has devised an innovative method of ultrasonic molding to obtain irregularly shaped packing made of foam material, which overcomes the drawbacks of conventional molding methods. Various irregularly shaped packings can be easily and reliably molded into their desired shapes.
また、発泡シート６を、金型５と発振ダイ４と
の間で全域に亘つて密着状に挟着せしめて該発振
ダイを超音波発振させるので、超音波発振を発振
ダイから発泡材シートに直接的に全域に亘つて伝
えることができ、この超音波発振によつて異形パ
ツキングの中央部を発泡材シートの有する発泡性
を緩和乃至除去して、異形パツキングの中央側を
硬質化すると共に、異形パツキングの周縁部の隆
起部は超音波発振による発泡性の緩和乃至除去作
用の影響をほとんど受けさせずに、発泡性を十分
保持させておくことが可能で、この隆起部を弾力
性に富んだ状態で維持できる。従つて、弾力性に
富んだ異形パツキングの隆起部を容器とキヤツプ
との間で挟ませることにより、パツキングの機能
を従来通りに十分発揮させることができ、しか
も、パツキングの中央部側の発泡性が緩和乃至除
去されて硬質化することにより、パツキングの装
着の際等の作業性を非常によいものになし得、ま
たパツキングが破損しにくくなると共に、容器等
に収納した流動体又は半流動体がパツキングから
漏れ出るようなことも効果的に防止できるように
なり、その実用的効果は著大である。 Further, since the foam sheet 6 is tightly sandwiched between the mold 5 and the oscillating die 4 over the entire area to cause the oscillating die to oscillate ultrasonic waves, the ultrasonic oscillation is transmitted from the oscillating die to the foam sheet. This ultrasonic oscillation can be transmitted directly over the entire area, and this ultrasonic oscillation relaxes or removes the foaming property of the foam sheet in the central part of the irregularly shaped packing, and hardens the central part of the irregularly shaped packing. The raised part on the periphery of the irregularly shaped packing can maintain its foaming properties sufficiently without being affected by the foaming property relaxation or removal effect caused by ultrasonic oscillation. It can be maintained in this state. Therefore, by sandwiching the highly elastic raised part of the irregularly shaped packing between the container and the cap, the function of the packing can be fully demonstrated as before, and the foamability of the central part of the packing can be improved. By relaxing or removing and hardening, the workability when installing the packing can be made very good, and the packing is less likely to be damaged. It is now possible to effectively prevent leakage of water from the packing, and the practical effect is significant.
第１図と第２図は異形パツキングの形状例を示
す各断面図である。第３図と第４図はその超音波
成形工程の要部を示す各断面図である。
１……中央部、２……周縁部、３……段部、４
……発振ダイ、５……金型、６……発泡材シー
ト、７……異形パツキング。
FIGS. 1 and 2 are cross-sectional views showing examples of shapes of irregularly shaped packing. FIGS. 3 and 4 are cross-sectional views showing essential parts of the ultrasonic molding process. 1... Central part, 2... Peripheral part, 3... Step part, 4
... Oscillation die, 5 ... Mold, 6 ... Foam sheet, 7 ... Irregular packing.
Claims (1)
間で全域に亘つて密着状に挟着さしめて該発振ダ
イ４を超音波発振させることにより、周縁部２に
隆起部を有する発泡材製の異形パツキング７を超
音波成形することを特徴とする異形パツキングの
成形方法。1 The foam material sheet 6 is tightly sandwiched between the mold 5 and the oscillating die 4 over the entire area, and the oscillating die 4 is caused to oscillate ultrasonic waves, thereby forming a foam having a raised portion on the peripheral edge 2. A method for forming irregularly shaped packing, characterized by ultrasonically forming irregularly shaped packing 7 made of wood.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57121863A JPS5911225A (en) | 1982-07-12 | 1982-07-12 | Forming method of irregular shaped gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57121863A JPS5911225A (en) | 1982-07-12 | 1982-07-12 | Forming method of irregular shaped gasket |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5911225A JPS5911225A (en) | 1984-01-20 |
| JPS634774B2 true JPS634774B2 (en) | 1988-01-30 |
Family
ID=14821790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57121863A Granted JPS5911225A (en) | 1982-07-12 | 1982-07-12 | Forming method of irregular shaped gasket |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5911225A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58136407A (en) * | 1982-02-10 | 1983-08-13 | Kasai Kogyo Co Ltd | Method for molding plastic molded product |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5221156U (en) * | 1975-07-31 | 1977-02-15 |
-
1982
- 1982-07-12 JP JP57121863A patent/JPS5911225A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58136407A (en) * | 1982-02-10 | 1983-08-13 | Kasai Kogyo Co Ltd | Method for molding plastic molded product |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5911225A (en) | 1984-01-20 |
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