JPH0156652B2 - - Google Patents
Info
- Publication number
- JPH0156652B2 JPH0156652B2 JP57189156A JP18915682A JPH0156652B2 JP H0156652 B2 JPH0156652 B2 JP H0156652B2 JP 57189156 A JP57189156 A JP 57189156A JP 18915682 A JP18915682 A JP 18915682A JP H0156652 B2 JPH0156652 B2 JP H0156652B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- split
- split mold
- holder
- female
- 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
- 238000003856 thermoforming Methods 0.000 claims description 19
- 238000000465 moulding Methods 0.000 claims description 13
- 239000002985 plastic film Substances 0.000 claims description 7
- 238000013459 approach Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 4
- 229920001169 thermoplastic Polymers 0.000 description 13
- 239000004416 thermosoftening plastic Substances 0.000 description 11
- -1 polyethylene Polymers 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 229920001577 copolymer Polymers 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 1
- 229920000571 Nylon 11 Polymers 0.000 description 1
- 229920000299 Nylon 12 Polymers 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 229920000305 Nylon 6,10 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
- 125000002777 acetyl group Chemical class [H]C([H])([H])C(*)=O 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010102 injection blow moulding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 235000014214 soft drink Nutrition 0.000 description 1
- 238000007666 vacuum forming Methods 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/261—Handling means, e.g. transfer means, feeding means
- B29C51/262—Clamping means for the sheets, e.g. clamping frames
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はプラグアシスト熱成形装置に関する。[Detailed description of the invention] [Industrial application field] TECHNICAL FIELD The present invention relates to plug-assisted thermoforming equipment.
熱可塑性プラスチツクシートを加熱軟化して所
要の型に押当て、型と材料の間隙にある空気を排
除し大気圧により型に密着させて形成する真空成
形、大気圧以上の圧縮空気あるいは真空を併用し
て成形する圧空成形等の熱成形は、射出成形、中
空成形に比べ機械設備も型も比較的簡単なことか
ら広く使用されている。熱成形法の一つであるプ
ラグアシスト成形法は、(i)肉厚の調整が出来る、
(ii)多数個取り成形でも隣接した成形品の影響がな
い、(iii)外面が精密に仕上がる等の特徴を有してお
り、カツプ、冷蔵庫のドアライナー等の凹型成形
品の大半はこの方法により成形されている。
Vacuum forming involves heating and softening a thermoplastic plastic sheet, pressing it against the desired mold, eliminating air in the gap between the mold and the material, and forming the sheet in close contact with the mold using atmospheric pressure, or using compressed air at or above atmospheric pressure or vacuum. Thermoforming such as air pressure forming is widely used because the machinery and molds are relatively simple compared to injection molding and blow molding. The plug assist molding method, which is one of the thermoforming methods, (i) allows the wall thickness to be adjusted;
(ii) There is no influence from adjacent molded products even when molding multiple molds, and (iii) the outer surface is precisely finished.This method is used for the majority of concave molded products such as cups and refrigerator door liners. It is molded by.
一方、清涼飲料水容器として、従来のガラス
瓶、金属缶の代わりに耐衝撃性に優れ、且つ廃棄
処理が金属缶に比べ簡単なプラスチツク缶が提案
され、特に最近では、光沢、高透明、ガスバリア
ー性の良さから一部熱可塑性ポリエステル缶が実
用化されている。しかしながら従来のプラグアシ
スト成形法によつて得られるプラスチツク缶は、
缶蓋の径と容量との関係から口径／深さが1/1.5
〜1/2といつた深絞りとなり、またその成形方法
から必然的に、(i)口部が肉厚になり蓋との巻締め
が困難である、(ii)縦方向の配向度が大きく、小さ
い衝撃でも縦割れを起こし易い、(iii)缶胴部に比べ
蓋の径が大きく、自動販売機にかかり難い等との
欠点を有している。口部を薄肉にする成形方法と
して、プラスチツクシートの締めつけ部の内側半
径Ｒを容器フランジの半径ｒの1.2ないし1.8倍に
する方法（特開昭56−137917号）が提案されてい
るが、該方法では口部は薄肉になるものの、耐縦
割れ性は改良されず、蓋の径も缶胴部より小さく
することは出来ないし、又プラグで軟化したプラ
スチツクシートを型内に押込む際に型の口部コー
ナーでプラスチツクシートがこすれ、製品表面に
傷がつく虞れがある。 On the other hand, plastic cans, which have excellent impact resistance and are easier to dispose of than metal cans, have been proposed as soft drink containers in place of conventional glass bottles and metal cans. Some thermoplastic polyester cans have been put into practical use due to their good properties. However, plastic cans obtained by the conventional plug-assisted molding method are
Diameter/depth is 1/1.5 due to the relationship between can lid diameter and capacity.
It is a deep drawing of ~1/2, and due to the forming method, (i) the opening is thick and difficult to tighten with the lid, and (ii) the degree of vertical orientation is large. (iii) The diameter of the lid is larger than the can body, making it difficult to hang it in a vending machine. As a forming method for making the mouth part thinner, a method has been proposed in which the inner radius R of the tightening part of the plastic sheet is set to 1.2 to 1.8 times the radius r of the container flange (Japanese Patent Laid-Open No. 137917/1983). Although this method makes the mouth part thinner, it does not improve longitudinal cracking resistance, the diameter of the lid cannot be made smaller than the can body, and the plastic sheet that has been softened by the plug is forced into the mold. There is a risk that the plastic sheet will rub against the corner of the opening, causing scratches on the product surface.
そこで、口部を胴部より小径に形成する成形品
の熱成形装置として、実公昭37−30582号公報、
及び、特開昭48−40858号公報が提案されている。 Therefore, as a thermoforming device for molded products in which the mouth part is formed to have a smaller diameter than the body part, Japanese Utility Model Publication No. 37-30582,
Also, Japanese Patent Application Laid-Open No. 48-40858 has been proposed.
前記実公昭37−30582号公報に記載された熱成
形装置は、雌型の開口縁上に、割り雄型を載置
し、この割り雄型を、雌型の開口縁に対して半径
方向に進退できるように形成し、成形品の成形後
に割り雄型を後退させて成形品を雌型から抜き取
るようにしたものである。 The thermoforming apparatus described in the above-mentioned Japanese Utility Model Publication No. 37-30582 places a split male mold on the opening edge of the female mold, and the split male mold is radially moved relative to the opening edge of the female mold. It is formed so that it can move forward and backward, and after molding the molded product, the split male mold is moved back and the molded product is extracted from the female mold.
前記特開昭48−40858号公報に記載された熱成
形装置は、金型本体の口縁部内側にあり溝を設
け、このあり溝にアンダーカツト金型の下部に設
けたありを挿脱自在に挿入し、かつ、このアンダ
ーカツト金型のありは、引つ張りばねであり溝内
に引つ張られるようにして設けたものである。そ
して、アンダーカツト金型のありが、あり溝に挿
入された状態で、成形品を成形し、成形品を金型
本体から抜き取るには、アンダーカツト金型が成
形品のアンダーカツト部に係止した状態で成形品
を抜き出すと、アンダーカツト金型がアンダーカ
ツト部に係支したまま引つ張りばねに抗して成形
品と共に上昇し、同時にありがあり溝から抜け出
る。アンダーカツト金型が金型本体より上方に上
昇すると、引つ張りばねの復元力が、アンダーカ
ツト金型とアンダーカツト部との係支摩擦力より
大きくなり、アンダーカツト金型が反り返つてア
ンダーカツト部から外れ、成形品は金型本体から
抜き取られ、アンダーカツト金型は引つ張りばね
の復元力で引つ張られ、アンダーカツト金型のあ
りが金型本体のあり溝に嵌入するものである。 The thermoforming device described in the above-mentioned Japanese Patent Application Laid-Open No. 48-40858 has a groove provided inside the mouth edge of the mold body, and a dovetail provided at the bottom of the undercut mold can be freely inserted into and removed from this groove. The dovetail of this undercut mold is a tension spring and is provided so as to be pulled into the groove. Then, the molded product is molded with the dovetail of the undercut mold inserted into the dovetail groove, and in order to remove the molded product from the mold body, the undercut mold is locked to the undercut part of the molded product. When the molded product is extracted in this state, the undercut mold, while being engaged with the undercut portion, rises together with the molded product against the tension spring, and at the same time, the molded product is pushed out of the groove. When the undercut mold rises above the mold body, the restoring force of the tension spring becomes larger than the engagement friction force between the undercut mold and the undercut part, causing the undercut mold to warp and become undercut. The molded product is removed from the cut part, the molded product is extracted from the mold body, the undercut mold is pulled by the restoring force of the tension spring, and the dovetail of the undercut mold fits into the dovetail groove of the mold body. It is.
前記実公昭37−30582号公報及び、特開昭48−
40858号公報に記載された従来の熱成形装置は、
アンダーカツト部を有する成形品を簡単な成形装
置で成形でき便利である。
The above-mentioned Utility Model Publication No. 30582/1982 and Japanese Patent Application Laid-open No. 1973-
The conventional thermoforming device described in Publication No. 40858 is
It is convenient because a molded product having an undercut portion can be molded using a simple molding device.
しかしながら、前記実公昭37−30582号公報に
記載された従来のものは、割り雄型を雌型の開口
縁に対して半径方向に進退させるものであるの
で、その割り雄型を進退させる駆動装置を必要と
するものである。また、その駆動装置を設けると
熱成形装置を、成形品が同時多数個形成できる多
数個取りに形成することが困難である。 However, the conventional device described in the above-mentioned Japanese Utility Model Publication No. 37-30582 moves the split male mold forward and backward in the radial direction with respect to the opening edge of the female mold. It requires Further, if such a drive device is provided, it is difficult to form the thermoforming device into a multi-piece molding device capable of forming a large number of molded products at the same time.
前記特開昭48−40858号公報に記載された従来
の熱成形装置は、成形品の抜取時に、アンダーカ
ツト金型が成形品と共に引つ張りばねを引き伸ば
して上昇し、アンダーカツト金型とアンダーカツ
ト部との摩擦力よりも引つ張りばねの復元力が大
きくなると、アンダーカツト金型が外れるもので
あるので、アンダーカツト金型のありは、金型本
体のあり溝に衝突する形で引き込まれるので、あ
り溝とありが摩耗し、また損傷する虞れがある。 In the conventional thermoforming apparatus described in JP-A-48-40858, when the molded product is extracted, the undercut mold moves up along with the molded product by stretching a tension spring, and the undercut mold and the undercut mold move upward together with the molded product. If the restoring force of the tension spring becomes greater than the frictional force with the cut part, the undercut mold will come off, so the dovetail of the undercut mold will be retracted by colliding with the dovetail groove of the mold body. Because of this, there is a risk that the dovetail groove and dovetail will wear out and be damaged.
そして、アンダーカツト部とアンダーカツト金
型との係支が外れ難い形状であると前記傾向は一
層激しくなるので、アンダーカツト部の形状も制
限された形状としなければならない。さらに、ア
ンダーカツト部とアンダーカツト金型の摩擦のた
め成形品を損傷する虞れがある。 If the undercut portion and the undercut mold are shaped so that they are difficult to disengage, the above-mentioned tendency becomes more severe, so the shape of the undercut portion must also be limited. Furthermore, there is a risk of damaging the molded product due to friction between the undercut portion and the undercut mold.
本発明は前記事項に鑑みなされたものであり、
割り型の駆動装置に別の駆動装置を必要とせず、
成形装置を成形品の多数個取りに設計することが
容易であり、さらに、部品の摩耗や損傷の虞れが
なく、成形品の形状に制限が少なく、かつ、成形
品が損傷する虞れのないプラグアシスト熱成形装
置とすることを技術的課題とする。 The present invention has been made in view of the above matters,
No separate drive is required for the split type drive,
It is easy to design a molding device for molding a large number of molded products, there is no risk of wear or damage to parts, there are few restrictions on the shape of molded products, and there is no risk of damage to molded products. The technical challenge is to create a plug-assisted thermoforming device that does not require plug-assisted thermoforming.
本発明は雌金型１の口部外縁に、複数個の割り
型２を蝶着部材１１により蝶着して、割り型２が
回動して拡開できるように形成し、この割り型２
と雌金型１の口部外縁との間に、弾性体１０を介
挿して、前記割り型２を拡開する向きに付勢し、
そして、前記割り型２に対向して割り型押え３を
設けると共に、割り型押え３の更に上方に割り型
押え３に対向して、成形時にプラスチツクシート
を把持するクランプ４を設け、さらに、前記雌金
型１と前記割り型押え３の相対的接近によつて割
り型押え３が、前記割り型２を閉位置に圧接し、
前記雌金型１と前記割り型押え３の相対的離反に
よつて、割り型２が拡開するように形成し、か
つ、割り型２は、前記割り型押え３が圧接した閉
位置においては、雌金型１の口部径より小さい内
径となるように形成され、前記割り型押え３が割
り型２から離れた拡開位置においては、前記割り
型２の内径が雌金型１の口部径と同等以上の径に
拡開するように形成されたプラグアシスト熱成形
装置とした。
In the present invention, a plurality of split molds 2 are hinged to the outer edge of the mouth of a female mold 1 by a hinge member 11 so that the split molds 2 can be rotated and expanded.
and the outer edge of the mouth of the female mold 1, an elastic body 10 is inserted, and the split mold 2 is urged in a direction to expand,
A split die holder 3 is provided facing the split die 2, and a clamp 4 is provided above the split die holder 3 to face the split die holder 3 and grips the plastic sheet during molding. Due to the relative approach between the female mold 1 and the split mold holder 3, the split mold holder 3 presses the split mold 2 into the closed position,
The split mold 2 is formed to expand due to the relative separation of the female mold 1 and the split mold holder 3, and the split mold 2 is in the closed position where the split mold holder 3 is in pressure contact with the split mold 2. , is formed to have an inner diameter smaller than the opening diameter of the female mold 1, and when the split mold presser 3 is in the expanded position away from the split mold 2, the inner diameter of the split mold 2 is smaller than the opening diameter of the female mold 1. The plug assist thermoforming device is formed to expand to a diameter equal to or larger than the diameter of the plug.
そして、本発明の成形装置で成形に用いる熱可
塑性プラスチツクシートとは、具体的には例え
ば、ポリエチレン、ポリプロピレン、ポリブテ
ン、ポリ４−メチル−１−ペンテン及びエチレ
ン・酢酸ビニル共重合体等のポリオレフイン、ポ
リ塩化ビニル、フツ素樹脂、ポリスチレン、ポリ
ビニルアセタール及びポリメタクリル酸メチル等
のポリビニル化合物、ナイロン−６、ナイロン−
６，６、ナイロン−６，10、ナイロン−６，12、
ナイロン−11及びナイロン−12等のポリアミド、
ポリエチレンテレフタレート、ポリブチレンテレ
フタレート及びポレエチレンイソフタレート・テ
レフタレート共重合体等のポリエステル、ポリア
クリロニトリル、ポリカーボネート、ポリイミド
及びABS等の熱可塑性プラスチツクを押出成形、
圧縮成形、射出成形等をすることにより得られる
シート状もしくはフイルム状のものである。前記
熱可塑性プラスチツクの中では、剛性、透明性、
耐ガス透過性の点及び熱成形性が優れている点か
らポリエチレンテレフタレート、ポリブチレンテ
レフタレート、ポレエチレンイソフタレート・テ
レフタレート共重合体等のポリエステルが好まし
い。 Specifically, the thermoplastic plastic sheet used for molding in the molding apparatus of the present invention includes polyolefins such as polyethylene, polypropylene, polybutene, poly4-methyl-1-pentene, and ethylene/vinyl acetate copolymer; Polyvinyl compounds such as polyvinyl chloride, fluororesin, polystyrene, polyvinyl acetal and polymethyl methacrylate, nylon-6, nylon-
6,6, nylon-6,10, nylon-6,12,
polyamides such as nylon-11 and nylon-12;
Extrusion molding of polyesters such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene isophthalate/terephthalate copolymers, thermoplastics such as polyacrylonitrile, polycarbonate, polyimide, and ABS.
It is in the form of a sheet or film obtained by compression molding, injection molding, etc. Among the thermoplastics, rigidity, transparency,
Polyesters such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene isophthalate/terephthalate copolymers are preferred from the viewpoint of gas permeation resistance and excellent thermoformability.
さらに、前記プラグアシスト熱成形装置の雌金
型１は更に台盤（図示せず）に固定されており、
トグルあるいは油圧力等により対向するプラグ
（図示せず）の方向に移動し得るようになつてい
る。 Furthermore, the female mold 1 of the plug assist thermoforming device is further fixed to a base plate (not shown),
It can be moved in the direction of an opposing plug (not shown) by means of a toggle, hydraulic pressure, or the like.
尚、第６図において、空間部６は１つである
が、一度に多数の成形品を得ようとする場合に
は、金型に２つ以上の空間部６を設け、それに対
応する位置にプラグを設けることより、行なうこ
とができる。 In addition, in FIG. 6, there is one space 6, but when trying to obtain a large number of molded products at once, two or more spaces 6 are provided in the mold and the space 6 is placed at the corresponding position. This can be done by providing a plug.
そして、割り型押え３は、割り型２を押えた際
に割り型２の内径より内部に出なければ、形状は
問わないが、好適には円孔を有する板、リング状
のものである。割り型押え３の径は、また成形品
の抜けをよくするために雌型金型の口径より大き
くなくてはならない。 The split die presser 3 may have any shape as long as it does not protrude beyond the inner diameter of the split die 2 when the split die 2 is pressed, but it is preferably a plate having a circular hole or a ring shape. The diameter of the split mold presser 3 must also be larger than the diameter of the female mold in order to improve the ejection of the molded product.
クランプ４は前記割り型押え３と相対して熱可
塑性プラスチツクシートを把持するための部品で
あり、前記割り型２の内径より内部に出なければ
形状は問わないが、好ましくはシートの把握を確
実にするため、前記割り型押え３に対向して同一
径の円孔を有する板、リングあるいは円筒状物が
良い。 The clamp 4 is a part that faces the split mold holder 3 and is used to grip the thermoplastic sheet, and the shape does not matter as long as it does not extend beyond the inner diameter of the split mold 2, but it is preferable that the clamp securely grips the sheet. For this purpose, a plate, ring, or cylindrical object having a circular hole of the same diameter facing the split die presser 3 is preferable.
本発明のプラグアシスト熱成形装置は、第１図
に示すように、熱成形し得る温度に加熱されたポ
リエチレンテレフタレートシートＳからなる熱可
塑性プラスチツクシートを、割り型押え３とクラ
ンプ４の間に配置する。
As shown in FIG. 1, the plug assist thermoforming device of the present invention places a thermoplastic sheet made of a polyethylene terephthalate sheet S heated to a temperature at which it can be thermoformed between a split die presser 3 and a clamp 4. do.
次に、第２図に示すように、割り型押え３と雌
金型１を相対的に接近させて、割り型押え３で割
り型２を押圧して割り型２を閉位置に回動させ
る。 Next, as shown in FIG. 2, the split mold holder 3 and the female mold 1 are brought relatively close together, and the split mold holder 3 presses the split mold 2 to rotate the split mold 2 to the closed position. .
次に、第３図に示すように、雌金型１、割り型
２及び割り型押え３を、クランプ４と相対的に接
近させて、割り型押え３とクランプ４で熱可塑性
プラスチツクシートを把持する。 Next, as shown in FIG. 3, the female mold 1, the split mold 2, and the split mold holder 3 are brought relatively close to the clamp 4, and the thermoplastic sheet is gripped by the split mold holder 3 and the clamp 4. do.
次に、第４図に示すように、雌金型１とプラグ
５を相対的に接近させて、プラグ５を雌金型１内
ら突き伸ばして熱可塑性プラスチツクシートの凹
状部を形成した後、第５図に示すよう、圧力流体
を凹状部に圧入しおよび／または吸引により雌金
型１と熱可塑性プラスチツクシートとの間の空気
を排出させて、熱可塑性プラスチツクシートを雌
金型１に密着させ成形品を成形する。 Next, as shown in FIG. 4, the female mold 1 and the plug 5 are brought relatively close to each other, and the plug 5 is pushed out from inside the female mold 1 to form a concave portion of the thermoplastic sheet. As shown in FIG. 5, pressurized fluid is forced into the concave portion and/or air between the female mold 1 and the thermoplastic sheet is discharged by suction, so that the thermoplastic sheet is tightly attached to the female mold 1. and mold the molded product.
次に、クランプ４、割り型押え３と雌金型１と
を相対的に離反させると、第６図及び第８図に示
すように、割り型２は、弾性体１０により回動さ
れて拡開し、熱可塑性プラスチツクシートで成形
された成形品を雌金型１内から抜き取ることがで
きる。 Next, when the clamp 4, the split mold holder 3, and the female mold 1 are relatively separated, the split mold 2 is rotated and expanded by the elastic body 10, as shown in FIGS. 6 and 8. The molded article made of the thermoplastic sheet can be extracted from the female mold 1 by opening it.
第７図及び第８図は、本発明の一実施例のプラ
グアシスト熱成形装置を、一部省略して示すもの
である。
7 and 8 show a plug assist thermoforming apparatus according to an embodiment of the present invention, with some parts omitted.
この実施例は、内部に成形しようとする缶状物
に相当する空間部６を設けると共に、空気の排出
口７を設けた雌金型１を設け、この雌金型１の口
部外縁には、３個の割り型２の外周部の下部を蝶
着部材１１より蝶着して、割り型２が回動し第８
図に示すように拡開できるように形成してある。 In this embodiment, a female mold 1 is provided with a space 6 corresponding to the can-shaped product to be molded and an air outlet 7, and the outer edge of the mouth of the female mold 1 is , the lower part of the outer periphery of the three split molds 2 is hinged by the hinge member 11, and the split molds 2 rotate to form the eighth
It is formed so that it can be expanded as shown in the figure.
この割り型２外周部の上部に、引つ張りスプリ
ングとして形成した弾性体１０の一端を止着し、
弾性体１０の他端は、雌金型１の口部外縁に止着
して、割り型２と雌金型１との間に弾性体１０を
介挿し、前記割り型２を拡開する向きに付勢して
ある。 One end of an elastic body 10 formed as a tension spring is fixed to the upper part of the outer periphery of the split mold 2,
The other end of the elastic body 10 is fixed to the outer edge of the mouth of the female mold 1, and the elastic body 10 is inserted between the split mold 2 and the female mold 1, and the split mold 2 is expanded. is energized.
そして、前記割り型２に対向する上方にリング
状の割り型押え３が設けてあり、割り型押え３に
対向して上方に、熱可塑性プラスチツクシートを
把持するリング状のクランプ４が設けてある。 A ring-shaped split mold presser 3 is provided above the split mold 2, and a ring-shaped clamp 4 for gripping the thermoplastic sheet is provided above the split mold press 3. .
さらに、前記割り型３に前記雌金型１が上昇し
て接近することによつて、割り型押え３が、前記
割り型２に圧接して第７図に示すように割り型２
が閉じ、前記雌金型１が下降して前記割り型押え
３と離反することによつて、第８図に示すよう
に、割り型２が拡開するように形成してある。 Further, as the female mold 1 rises and approaches the split mold 3, the split mold presser 3 comes into pressure contact with the split mold 2, and as shown in FIG.
is closed and the female mold 1 is lowered and separated from the split mold holder 3, so that the split mold 2 is expanded as shown in FIG.
そして、この割り型２は、前記割り型押え３が
圧接した閉位置では、雌金型１の口部径よりも小
さい内径となるように形成されており、前記割り
型押え３が割り型２から離れた拡開位置において
は、前記割り型２の内径が雌金型１の口部径より
大径に拡開するように形成されている。 The split mold 2 is formed to have an inner diameter smaller than the mouth diameter of the female mold 1 in the closed position where the split mold holder 3 is in pressure contact with the split mold holder 3. In the expanded position away from the mold 2, the inner diameter of the split mold 2 is expanded to a larger diameter than the opening diameter of the female mold 1.
そして、クランプ４の上方には、第１図乃至第
６図に示すようにプラグ５が設けてあり、前記ク
ランプ４は、このプラグ５に上下動可能に装着さ
れ、さらに、このクランプ４はスプリングによつ
て割り型押え３側に付勢されている。 As shown in FIGS. 1 to 6, a plug 5 is provided above the clamp 4, and the clamp 4 is attached to the plug 5 so as to be movable up and down. is biased toward the split mold presser 3 side.
〔発明の効果〕
本発明は、プラグアシスト熱成形装置が必然的
に備えている雌金型１が他の部材に相対的に接近
し、また、離反するという機構を利用し、雌金型
１に設けた割り型２を割り型押え３に当接させて
割り型２を押圧して閉じ、また、離反させて割り
型２を拡開するように形成したので、割り型２の
駆動装置を別に設ける必要がなく構成が簡単とな
るものである。[Effects of the Invention] The present invention utilizes a mechanism in which the female mold 1, which is necessarily provided in a plug assist thermoforming device, relatively approaches and separates from other members. The split mold 2 provided in the split mold 2 is brought into contact with the split mold presser 3 to press the split mold 2 to close it, and to separate and expand the split mold 2, so that the drive device for the split mold 2 is There is no need to provide it separately, and the configuration is simple.
そして、その結果、プラグアシスト熱成形装置
を、成形品の多数個取りの行なえる装置に形成す
ることが容易である。 As a result, it is easy to form the plug assist thermoforming apparatus into an apparatus capable of molding a large number of molded products.
しかも、割り型２の回動のための割り型押え３
の割り型２に対する接近、及び離反を、前記雌金
型１の相対的接近及び離反によつて行なつている
ので、割り型２の回動速度を特別な装置を必要と
しないで緩やかなものとすることができ、部品の
摩耗や損傷を防ぐことができ、さらに、割り型２
が拡開した後成形品の抜き取りが行なえるので、
ネツク部の形状も多様なものに形成でき、成形品
も摩擦等により損傷する虞れがない。 Moreover, the split mold presser 3 for rotating the split mold 2
Since the approach and separation from the split mold 2 is performed by the relative approach and separation of the female mold 1, the rotating speed of the split mold 2 can be made gentle without the need for a special device. This can prevent wear and damage to parts, and furthermore, the split mold 2
The molded product can be extracted after it has expanded.
The shape of the neck portion can be formed into various shapes, and there is no risk of damage to the molded product due to friction or the like.
第１図乃至第８図は本発明の一実施例を示すも
ので、第１図乃至第６図はその作動状態説明用の
図、第７図は割り型が閉じた状態の断面図、第８
図は割り型が拡開した状態の断面図である。
１……雌金型、２……割り型、３……割り型押
え、４……クランプ。
Figures 1 to 8 show one embodiment of the present invention, Figures 1 to 6 are diagrams for explaining its operating state, Figure 7 is a sectional view of the split mold in a closed state, 8
The figure is a sectional view of the split mold in an expanded state. 1...Female mold, 2...Split mold, 3...Split mold presser, 4...Clamp.
Claims (1)
蝶着部材１１により蝶着して、割り型２が回動し
て拡開できるように形成し、この割り型２と雌金
型１の口部外縁との間に、弾性体１０を介挿し
て、前記割り型２を拡開する向きに付勢し、そし
て、前記割り型２に対向して割り型押え３を設け
ると共に、割り型押え３の更に上方に割り型押え
３に対向して、成形時にプラスチツクシートを把
持するクランプ４を設け、さらに、前記雌金型１
と前記割り型押え３の相対的接近によつて割り型
押え３が、前記割り型２を閉位置に圧接し、前記
雌金型１と前記割り型押え３の相対的離反によつ
て、割り型２が拡開するように形成し、かつ、割
り型２は、前記割り型押え３が圧接した閉位置に
おいては、雌金型１の口部径より小さい内径とな
るように形成され、前記割り型押え３が割り型２
から離れた拡開位置においては、前記割り型２の
内径が雌金型１の口部径と同等以上の径に拡開す
るように形成されたプラグアシスト熱成形装置。1 A plurality of split molds 2 are hinged to the outer edge of the mouth of the female mold 1 with a hinge member 11 so that the split molds 2 can be rotated and expanded, and the split molds 2 and the female mold are An elastic body 10 is inserted between the outer edge of the mouth of the mold 1 to bias the split mold 2 in the direction of expansion, and a split mold presser 3 is provided opposite the split mold 2. At the same time, a clamp 4 for gripping the plastic sheet during molding is provided further above the split mold holder 3, facing the split mold holder 3, and furthermore,
The split mold holder 3 presses the split mold 2 into the closed position by the relative approach of the split mold holder 3 and the split mold holder 3, and the relative separation of the female mold 1 and the split mold holder 3 causes the split mold holder 3 to press the split mold 2 into the closed position. The mold 2 is formed to expand, and the split mold 2 is formed to have an inner diameter smaller than the mouth diameter of the female mold 1 in the closed position where the split mold holder 3 is in pressure contact with the mold 2. Split mold presser 3 is split mold 2
The plug assist thermoforming device is formed so that the inner diameter of the split mold 2 expands to a diameter equal to or larger than the mouth diameter of the female mold 1 at an expanded position away from the plug assist thermoforming device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18915682A JPS5978812A (en) | 1982-10-29 | 1982-10-29 | Method of molding thermoplastic resin container and molds therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18915682A JPS5978812A (en) | 1982-10-29 | 1982-10-29 | Method of molding thermoplastic resin container and molds therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5978812A JPS5978812A (en) | 1984-05-07 |
| JPH0156652B2 true JPH0156652B2 (en) | 1989-11-30 |
Family
ID=16236375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18915682A Granted JPS5978812A (en) | 1982-10-29 | 1982-10-29 | Method of molding thermoplastic resin container and molds therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5978812A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01141021U (en) * | 1988-03-22 | 1989-09-27 | ||
| JP2611854B2 (en) * | 1989-07-18 | 1997-05-21 | 出光石油化学 株式会社 | Molding method of thermoplastic sheet |
| US20130092312A1 (en) * | 2011-10-14 | 2013-04-18 | Kellogg Company | Methods for forming composite structures |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4840858A (en) * | 1971-09-23 | 1973-06-15 |
-
1982
- 1982-10-29 JP JP18915682A patent/JPS5978812A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4840858A (en) * | 1971-09-23 | 1973-06-15 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5978812A (en) | 1984-05-07 |
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