JPS63154329A - Molding method of hinge part and its mold - Google Patents

Molding method of hinge part and its mold

Info

Publication number
JPS63154329A
JPS63154329A JP30355086A JP30355086A JPS63154329A JP S63154329 A JPS63154329 A JP S63154329A JP 30355086 A JP30355086 A JP 30355086A JP 30355086 A JP30355086 A JP 30355086A JP S63154329 A JPS63154329 A JP S63154329A
Authority
JP
Japan
Prior art keywords
mold
molding
hinge part
receiving
receiving 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.)
Granted
Application number
JP30355086A
Other languages
Japanese (ja)
Other versions
JPH0360657B2 (en
Inventor
Nobuyuki Komatsuzaki
信之 小松崎
Teruo Kageyama
影山 輝雄
Kiyoshi Aida
合田 清
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sekisui Kasei Co Ltd
Original Assignee
Sekisui Plastics Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sekisui Plastics Co Ltd filed Critical Sekisui Plastics Co Ltd
Priority to JP30355086A priority Critical patent/JPS63154329A/en
Publication of JPS63154329A publication Critical patent/JPS63154329A/en
Publication of JPH0360657B2 publication Critical patent/JPH0360657B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/22Hinges, pivots

Landscapes

  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

PURPOSE:To prevent defective molding of a hinge part and shearing at the hinge part from being produced in a molding process, and to enable improvement in yield of a predetermined molded product, by performing pressure molding by placing elastically a foamed sheet between a pair of molds. CONSTITUTION:Pressure molding of a thermoplastic sheet S1 softened through heating is performed by placing the same elastically between a male and female molds 11, 12. Therefore, even if, for example, a positional deviation is generated between a force 13 and receiving mold 14' and one-side extrusion force is acted upon the foamed sheet S1 to be born by a receiving mold 14 side, a part of the one-side extrusion force to be applied to the receiving mold 14 through the receiving mold 14' can be absorbed by an elastic member 15. With this construction, the one-side extrusion force of the force 13 to the foamed sheet S1 can be made uniform and unevenness in finishing form of a bent groove 4a can be prevented by the desired extrusion force.

Description

【発明の詳細な説明】 〈産業上の利用分野〉 この発明は、ヒンジ部の成形方法及びその成形用型に関
し、より詳細には、熱可塑性樹脂の発泡シートを加圧成
形して、複数の折曲溝を有するヒンジ部を成形するヒン
ジ部の成形方法及びその成形用型に関する。
[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a method for molding a hinge part and a mold for the same, and more specifically, it relates to a method for molding a hinge part and a mold for the same. The present invention relates to a method for molding a hinge portion having a bending groove and a mold for the molding.

〈従来の技術〉 従来より、上記ヒンジ部としては、納豆の収納用容器等
に代表される、例えば蓋付の包装用容器に設けられるも
のであって、第5図及び第6図に示す包装用容器(1)
のように、容器本体(2)と蓋体(3)とを一体的に連
設し、容器本体(りに対して蓋体(3)を屈曲可能且つ
嵌合可能に設けるヒンジ部(4)が知られている。
<Prior Art> Conventionally, the above-mentioned hinge portion has been provided in, for example, a packaging container with a lid, such as a container for storing natto, and the hinge portion is provided in a packaging container shown in FIGS. 5 and 6. Container (1)
A hinge part (4) in which the container body (2) and the lid (3) are integrally connected, and the lid (3) is provided to be bendable and fitable with respect to the container body. It has been known.

ヒンジ部(4)は、縦断面略V字状の複数の折曲溝(4
a)から形成されている。
The hinge part (4) has a plurality of bending grooves (4) each having a substantially V-shaped longitudinal section.
It is formed from a).

このような容器の成形方法においては、第7図及び第8
図に示すように、例えば発泡ポリスチレンシート等の熱
可塑性樹脂の発泡シート(81)を使用し、雄型(11
)、雌型(12)からなる一体成形用型を具備した圧縮
成形手段により、上記発泡シート(Sl)をシート成形
している。
In the method of forming such a container, FIGS. 7 and 8
As shown in the figure, a foamed sheet (81) of thermoplastic resin such as a foamed polystyrene sheet is used, and a male mold (11) is used.
), the foamed sheet (Sl) is sheet-molded by a compression molding means equipped with an integral molding mold consisting of a female mold (12).

そして、このような成形方法に用いられる雄型(11)
、雌型(12)には、通常、容器本体(2)と蓋体(3
)とを成形する部分であって、夫々対応する位置に、凸
部(lla) 、凹部(12a)及び、はぼ平坦な面部
(llb) 、  (12b)が形成されている。
And a male mold (11) used in such a molding method
, the female mold (12) usually has a container body (2) and a lid (3).
), and a convex portion (lla), a concave portion (12a), and substantially flat surface portions (llb) and (12b) are formed at corresponding positions.

そして、雄型(11)の凸部(lla)と面部(llb
)との間及び、雌型(12)の凹部(12a)と面部(
12b)との間には、上記ヒンジ部(4)を成形する部
分であって、夫々対応する位置に、押し型(13)、受
け型(14)が固着されている。
Then, the convex part (lla) and the surface part (llb) of the male mold (11)
) and between the recess (12a) of the female mold (12) and the surface (
12b), a pressing die (13) and a receiving die (14) are fixed at corresponding positions in the portion where the hinge portion (4) is to be formed.

この場合、受け型(■4)に対する押し型(13)の対
向表面には、上記ヒンジ部(4)を構成する折曲溝(4
a)に対応して、縦断面略V字状の突起(13a)が形
成されており、他方、受け型(14)の対向表面には、
突起(13a)に対応し且つ型閉じ時にこれと歯合し得
る、同じく縦断面略V字状の小凹部(14a)が形成さ
れている。
In this case, the surface of the push mold (13) facing the receiving mold (■4) has a bending groove (4) constituting the hinge portion (4).
Corresponding to a), a projection (13a) having a substantially V-shaped longitudinal section is formed, and on the other hand, on the opposing surface of the receiving mold (14),
A small recess (14a), which also has a substantially V-shaped longitudinal section, is formed to correspond to the projection (13a) and to engage with it when the mold is closed.

この小凹部(14a)は、第8図から分かるように、上
記型閉じ時、突起(13a)により押圧されて受け型(
14)側に膨出してくる発泡シート(31)の一部を導
入し、折曲溝(4a)の形状を略V字状の溝形に形成し
易くするものであって、ヒンジ部(4)での折り曲げ状
態を良好にするものである。
As can be seen from FIG. 8, this small recess (14a) is pressed by the protrusion (13a) when the mold is closed, and the receiving mold (
A part of the foam sheet (31) that bulges out to the side (14) is introduced to make it easier to form the bending groove (4a) into a substantially V-shaped groove. ) to improve the bending condition.

〈発明が解決しようとする問題点〉。<Problem that the invention seeks to solve>.

上記のような容器の成形方法においては、対向する雄型
(11)と雌型(12)、或いは押し型(13)と受け
型(14)の組み付は精度の悪さや、加工精度の悪さ等
から、これら夫々の間に位置ズレが生じたりする場合、
突起(13a)と小凹部(14a)との間にも多少の位
置ズレが起こることとなる。
In the container molding method described above, the assembly of opposing male molds (11) and female molds (12), or push molds (13) and receiving molds (14) may be performed with poor precision or poor processing accuracy. If there is a positional shift between them due to etc.,
Some misalignment will also occur between the protrusion (13a) and the small recess (14a).

これでは、小凹部(14a)側にかかる突起(13a)
よりの押圧力が、受け型(14)側に支承されいてる発
泡シート(81)に対し、部分的に強すぎたり、或いは
弱すぎたりして、所望形状の折曲溝(4a)を形成する
ことができないこととなる。このようないわゆる偏った
圧力により成形されるヒンジ部(4)では、円滑なヒン
ジ機能を奏することができず、容器の折り曲げ不良を招
くことになる。
In this case, the protrusion (13a) hanging on the small recess (14a) side
The pressing force of the twist is partially too strong or too weak against the foam sheet (81) supported on the receiving mold (14) side, forming a bending groove (4a) in the desired shape. It becomes impossible to do so. The hinge portion (4) formed by such so-called uneven pressure cannot perform a smooth hinge function, leading to defective bending of the container.

しかも、小凹部(14a)側にかかる突起(13a)よ
りの押圧力が、発泡シート(Sl)に対して強すぎる場
合では、折曲溝(4a)の形成部分に過剰の押圧力がか
かることになって、この折曲溝(4a) (ヒンジ部)
において容器が剪断されてしまうという問題がある。
Moreover, if the pressing force from the protrusion (13a) applied to the small recess (14a) side is too strong against the foam sheet (Sl), excessive pressing force may be applied to the portion where the bending groove (4a) is formed. This bending groove (4a) (hinge part)
There is a problem that the container is sheared during the process.

〈発明の目的〉 この発明は上記問題点に鑑みてなされたものであり、成
型過程におけるヒンジ部の成形不良或いは、ヒンジ部で
の剪断(ヒンジ切れ)等を防止すると共に、所望形状の
ヒンジ部の成形を図り、所定成形品の歩留まりを高め得
るヒンジ部の成形方法及び、このヒンジ部の成形方法に
好適に用いられる成形用型を提供することを目的とする
ものである。
<Object of the Invention> The present invention has been made in view of the above-mentioned problems, and it prevents molding defects of the hinge part or shearing at the hinge part (hinge breakage) during the molding process, and also prevents the hinge part from having a desired shape. It is an object of the present invention to provide a method for molding a hinge portion that can improve the yield of a predetermined molded product, and a mold suitably used in the method for molding the hinge portion.

く問題点を解決するための手段〉 上記目的を達成するためのこの第1の発明のヒンジ部の
成形方法としては、熱可塑性樹脂の発泡シートを加圧成
形して、複数の折曲溝を存するヒンジ部を成形するヒン
ジ部の成形方法において、一対の成形用型間にて、上記
発泡シートを弾性的に挾み込んで加圧成形するものであ
り、第2の発明のヒンジ部の成形用型としては、熱可塑
性樹脂の発泡シートに、複数の折曲溝を有するヒンジ部
を加圧成形するヒンジ部の成形用型であって、互いに対
向して設けられる押し型と受け型とを具備し、上記押し
型又は受け型のいずれか一方の対向表面を、上記複数の
折曲溝に対応する凹凸形状に形成すると共に、上記押し
型及び受け型の少なくとも何れか一方は、加圧成形時に
弾性収縮可能な弾性部材により支承されてなるものであ
る。
Means for Solving the Problems> To achieve the above object, the method for molding the hinge portion of the first invention involves pressure molding a foamed sheet of thermoplastic resin to form a plurality of bending grooves. In the existing hinge part molding method for molding a hinge part, the foamed sheet is elastically sandwiched between a pair of molds and pressure molded, and the hinge part molding method according to the second invention The mold used is a hinge part molding mold for pressure-molding a hinge part having a plurality of bending grooves on a foamed sheet of thermoplastic resin. The opposing surface of either the pressing mold or the receiving mold is formed into an uneven shape corresponding to the plurality of bending grooves, and at least one of the pressing mold and the receiving mold is formed by pressure molding. It is sometimes supported by an elastic member that can be elastically contracted.

く作用〉 上記第1の発明のヒンジ部の成形方法によれば、一対の
成形用型間にて、熱可塑性樹脂の発泡シートを弾性的に
挾み込んで加圧成形するので、■ 互いに対向する成形
用型間に位置ズレが生じていたりして、例えば受け側の
成形用型に支承されている発泡シートに偏った押圧力が
作用する状態であっても、上記弾性的機能によりこの偏
った押圧力の一部を吸収可能とし、押し側の成形用型の
発泡シートへの押圧力を均−状にすることができる。こ
れにより、例えばヒンジ部を構成する折曲溝の仕上げ形
状のバラツキを防止することができる。
According to the method for molding the hinge portion of the first invention, a foam sheet of thermoplastic resin is elastically sandwiched between a pair of molds and pressure molded, so that ■ Even if there is a misalignment between the molds, for example, and a biased pressing force is applied to the foam sheet supported by the receiving mold, the elastic function described above will prevent this bias. It is possible to absorb a part of the pressing force exerted on the foamed sheet by the molding die on the pressing side, thereby making it possible to even out the pressing force against the foam sheet. Thereby, for example, variations in the finished shape of the bending grooves forming the hinge portion can be prevented.

■ そして、受け側の成形用型に支承されている発泡シ
ートに、押し側の成形用型により過剰な押圧力が作用し
ても、上記弾性機能によりこの過剰な押圧力の一部を吸
収することができる。これにより、例えば、ヒンジ部に
おける発泡シートの剪断を防止することができる。
■ Even if excessive pressing force is applied by the pushing mold to the foam sheet supported by the receiving mold, the elastic function will absorb a portion of this excessive pressing force. be able to. Thereby, for example, shearing of the foam sheet at the hinge portion can be prevented.

また、上記第2の発明のヒンジ部の成形用型によれば、
押し型及び受け型の少なくとも何れか一方を、弾性収縮
可能な弾性部材により支承しているので、押し型及び受
け型を型閉めしたとき、その間に挾み込んだ発泡シート
のヒンジ部成形部分を弾力的に押圧成形することができ
、上記第1の発明のヒンジ部の成形方法において必要と
される成形を確実に行ない得る。
Moreover, according to the mold for forming the hinge part of the second invention,
At least one of the press mold and the receiving mold is supported by an elastic member that can be elastically contracted, so when the press mold and the receiving mold are closed, the molded part of the hinge part of the foam sheet sandwiched between them is It can be elastically pressed and molded, and the molding required in the method for molding the hinge portion of the first invention can be reliably performed.

〈実施例〉 以下実施例を示す添付図面によって詳細に説明する。な
お、第7図及び第8図に示した従来の一体成形用型等と
共通する構成要素には同一の符号を使用して説明する。
<Examples> Examples will be described in detail below with reference to the accompanying drawings showing examples. Note that the same reference numerals will be used to describe the same components as those of the conventional integral molding mold shown in FIGS. 7 and 8.

第1図、第2図において、ヒンジ部の成形用型は、上記
第7図及び第8図に示した従来公知のヒンジ部の成形用
型をその基本構造として採用し、第7図、第8図に示し
たと同様に、加熱軟化状態にある発泡シート(Sl)を
型閉めして、所定形状の包装用容器(1)(第5図、第
6図参照)に成形する雄型(11)と、雌型(12)に
装備されている。
In FIGS. 1 and 2, the mold for molding the hinge part adopts the conventionally known mold for molding the hinge part shown in FIGS. 7 and 8 above as its basic structure. As shown in Fig. 8, a male mold (11 ) and female type (12).

このようなヒンジ部の成形用型は、従来公知の成形用型
と同様互いに対向する位置であって、上記雄型(11)
の凸部(lla)と平坦な面部(llb)との間に固着
されている押し型(13)と、雌型(12)の凹部(1
2a)と平坦面部(12b)との間に設けられている受
け型(14’)とにより構成されている。
The molds for molding the hinge portion are positioned opposite to each other like conventionally known molds, and
The push mold (13) is fixed between the convex part (lla) and the flat surface part (llb), and the recess (1) of the female mold (12).
2a) and a receiving mold (14') provided between the flat surface part (12b).

このうち、受け型(14’)は、押し型(13)に対す
る対向表面をほぼ平坦状に形成していると共に、裏面に
対接させた弾性収縮可能な弾性部材(15)により支承
されている。
Among these, the receiving mold (14') has a substantially flat surface facing the pressing mold (13), and is supported by an elastic member (15) that is elastically contractible and faces the back surface. .

弾性部材(15)は、雌型(12)に形成されである収
納穴(19)内に、若干の余裕スペース(18)を介し
て収納されており、例えば、押し型(13)の押圧方向
に収縮し、同押圧力の解除に応じて、復元するものであ
る。
The elastic member (15) is housed in a storage hole (19) formed in the female die (12) with a slight allowance space (18) in between, for example, in the pressing direction of the push die (13). It contracts and restores itself when the pressing force is released.

弾性部材(15)としては、ブロック状のウレタンゴム
が使用されているが、この他にも、弾力性を有する合成
樹脂材が使用されても良いし、コイルばね等の金属製部
材が用いられても良い。
As the elastic member (15), a block-shaped urethane rubber is used, but in addition to this, a synthetic resin material having elasticity may be used, or a metal member such as a coil spring may be used. It's okay.

一方、受け型(14’)の略平坦な対向表面(14a’
)は、型閉じ時において、受け型(14’)側が押し型
(13)の突起(13a)と歯合しないようにしておく
ためのものであって、突起(13a)と受け型(14’
)側との多少の位置ズレを容認するものである。
On the other hand, the substantially flat opposing surface (14a') of the receiving mold (14')
) is to prevent the receiving mold (14') side from meshing with the protrusion (13a) of the push mold (13) when the mold is closed.
) side is allowed.

第1図及び第2図を参照して、上記包装用容器(1)(
第5図参照)を製造するための成形工程を説明する。
With reference to FIGS. 1 and 2, the packaging container (1) (
The molding process for manufacturing the following will be explained.

雄型(11)、雌型(12)は、図示せぬ公知の加圧成
形装置に装備される上型、下型であり、これら雄型(1
1)、雌型(12)には、第5図に示した包装用容器(
1)の外形に夫々対応する凹凸部分が形成されている。
The male mold (11) and the female mold (12) are an upper mold and a lower mold that are installed in a known pressure molding device (not shown).
1), the female mold (12) is equipped with a packaging container (
Concave and convex portions corresponding to the outer shape of 1) are formed.

なお、雄型(tl)、雌型(12)の形状説明は第7図
及び第8図で行っているので、ここでは省略する。
Note that the shapes of the male mold (tl) and the female mold (12) have been explained in FIGS. 7 and 8, and will therefore be omitted here.

まず、第1図に示すように、雄型(11)と雌゛型(1
2)との間に、加熱軟化した発泡シート(81)を配置
し、次いで第2図に示すように、雄型(11)と雌型(
12)とを型閉めして、軟化状態の発泡シート(Sl)
を加圧成形し、所定形状の包装用容器(1)を成形する
(第5図参照)。
First, as shown in Figure 1, the male type (11) and the female type (1
A heat-softened foam sheet (81) is placed between the male mold (11) and the female mold (81) as shown in FIG.
12) and the mold is closed to form a softened foam sheet (Sl).
is pressure-molded to form a packaging container (1) of a predetermined shape (see FIG. 5).

なお、このような雄型(11)と雌型(12)とによる
成形工程は、基本的には通常のシート成形と同様の方法
で実施され、シートの保持機構や加熱機構等その他の構
造についても、従来装置と同様の構造で実施されるので
、詳細な成形工程及び成形装置の構造については、図示
及び説明を省略する。
The molding process using the male mold (11) and female mold (12) is basically carried out in the same manner as normal sheet molding, and other structures such as the sheet holding mechanism and heating mechanism are not changed. Since the molding apparatus is also implemented with the same structure as the conventional apparatus, detailed illustrations and descriptions of the molding process and the structure of the molding apparatus will be omitted.

このとき、雄型(11)、雌型(12)間では、第2図
に示すように、熱可塑性樹脂の発泡シート(Sl)を弾
力的に挾み込んで加圧成形することになる。従って、例
えば互いに対向する押し型(13)と受け型(14’)
との間に位置ズレが生じ、受け型(14’)側に支承さ
れる発泡シート(Sl)に偏った押圧力が作用すること
となっても、弾性部材(15)が受け型(14’)を介
してこの受け型(14’)にかかる偏った押圧力の一部
を吸収する。但し、弾性部材(15)の収縮の度合いと
しては、押し型(I3)側からの押圧力により弾性部材
(15)が収縮し過ぎて、この押し型(13)が発泡シ
ート(Sl)を突き破らない程度に設定される。
At this time, as shown in FIG. 2, a thermoplastic resin foam sheet (Sl) is elastically inserted between the male die (11) and the female die (12) for pressure molding. Therefore, for example, the pushing die (13) and the receiving die (14') facing each other
Even if a misalignment occurs between the elastic member (15) and the foam sheet (Sl) supported by the receiving mold (14'), a biased pressing force will be applied to the foam sheet (Sl) supported by the receiving mold (14'). ) absorbs a portion of the uneven pressing force applied to this receiving mold (14'). However, the degree of contraction of the elastic member (15) is such that the elastic member (15) contracts too much due to the pressing force from the pressing mold (I3) side, and this pressing mold (13) pushes against the foam sheet (Sl). It is set so that it will not break.

これにより、押し型(13)の発泡シート(Sl)への
偏った押圧力を均一状にすることができ、所望の押圧力
により折曲溝(4a)の仕上げ形状のバラツキを防止す
ることができる、 ■ また、受け型(14’)に支承されている発泡シー
ト(Sl)に押し型(I3)より過剰な押圧力が作用し
ても、同じく、良好な上記弾性機能を発揮する弾性部材
(15)がこの過剰な押圧力の一部を吸収することがで
きる。これにより、発泡シート(Sl)に対する過剰な
押圧力を緩和することができ、ヒンジ部(4]における
発泡シート(Sl)の不要な剪断を防止することができ
る。
As a result, it is possible to make the uneven pressing force of the pressing die (13) on the foam sheet (Sl) uniform, and it is possible to prevent variations in the finished shape of the bending groove (4a) by applying the desired pressing force. ■Also, even if an excessive pressing force is applied to the foam sheet (Sl) supported by the receiving mold (14') from the pressing mold (I3), the elastic member also exhibits the above-mentioned good elastic function. (15) can absorb part of this excessive pressing force. Thereby, excessive pressing force on the foam sheet (Sl) can be alleviated, and unnecessary shearing of the foam sheet (Sl) at the hinge portion (4) can be prevented.

この場合、受け型(14’)の押し型(13)に対する
対向表面(14a’)が、はぼ平坦状に形成されている
ことから、型閉じ時、受け型(14’)側の突起(13
a)との歯合関係をなくすことができる。これにより、
押し型(13)と受け型(1,4’)との間に生じた上
記位置ズレ等に起因する双方の歯合のズレを解消するこ
とができ、ヒンジ部[4)での剪断をより有効に防止す
ることができる。
In this case, since the surface (14a') of the receiving mold (14') facing the pressing mold (13) is formed in a substantially flat shape, when the mold is closed, the protrusion on the receiving mold (14') side ( 13
The interlocking relationship with a) can be eliminated. This results in
It is possible to eliminate the misalignment of both teeth caused by the above-mentioned positional misalignment between the push die (13) and the receiving die (1, 4'), and to reduce shearing at the hinge part [4]. It can be effectively prevented.

即ち、受け型(14’)の対向表面(t4a’)は、突
起(13a)と受け型(14’)との多少の位置ズレを
容認するものであり、受け型(14’)を弾性部材(1
5)により支承したことと併せて、雄型(11)、雌型
(12)及び、押し型(13)、受け型(14’)等の
各組み付は作業を容易にし、押し型(13)、受け型(
14’)の加工精度を比較的ラフにしておくことができ
る。
That is, the facing surface (t4a') of the receiving mold (14') allows for some positional deviation between the protrusion (13a) and the receiving mold (14'), and allows the receiving mold (14') to be attached to the elastic member. (1
5), the assembly of the male mold (11), female mold (12), push mold (13), receiving mold (14'), etc. is easy, and the push mold (13) ), receiving mold (
14') can be kept relatively rough.

こうして、包装用容器[1)が成形されると、雄型(1
1)と雌型(12)とを型開きし、包装用容器【1)を
型外しした後、第5図に示す包装用容器(1)を得る。
In this way, when the packaging container [1] is molded, the male mold (1
After opening the mold 1) and the female mold (12) and removing the packaging container [1] from the mold, the packaging container (1) shown in FIG. 5 is obtained.

この後、包装用容器(1)は、後工程のトリミング装置
等に搬送されてトリミングされる。
Thereafter, the packaging container (1) is transported to a trimming device or the like in a post-process and is trimmed.

次に、第3図、第4図に受け型の変形例を示す。Next, FIGS. 3 and 4 show modified examples of the receiving mold.

第3図の受け型(16)は、縦断面略T字状に形成され
ており、対向表面(1[ia)の下部の幅狭部(16b
)周囲に、弾性部材(15)の変形を許容するための余
裕スペース(18)を設けている。
The receiving mold (16) in FIG.
) An extra space (18) is provided around the periphery to allow deformation of the elastic member (15).

第4図の受け型(17)は、対向表面(L7a)を上面
とする縦断面略台形状に形成されており、雌型(12)
に形成された略台形状の収容穴(19)の下部周囲部分
に、弾性部材(15)の変形を許容するための余裕スペ
ース(18)を設けている。
The receiving mold (17) in FIG.
An allowance space (18) for allowing deformation of the elastic member (15) is provided around the lower portion of the approximately trapezoidal housing hole (19) formed in the housing.

なお、以上の実施例では、この弾性部材を、雌型に装備
された受け型側に設けた場合のものについて説明した。
In the above embodiments, the elastic member was provided on the side of the receiving mold installed in the female mold.

しかじな゛がら、この他、この弾性部材は、押し型を支
承するものとして、雄型に装備された押し型側に設けら
れても良く、また、それら双方を弾性的に支承するべく
、同時に、押し型、受け型に設けられても良いなど、こ
の発明のヒンジ部の成形に用いられる押し型、受け型は
、上記の実施例に限定されることなく、この発明の要旨
を変更しない範囲で種々の設計変更を施すことができる
However, in addition to this, this elastic member may also be provided on the side of the pressing mold equipped on the male mold to support the pressing mold, and in order to elastically support both of them, At the same time, the press mold and the receiving mold used for forming the hinge part of the present invention are not limited to the above-mentioned embodiments, and may be provided in a press mold and a receiving mold, without changing the gist of the present invention. Various design changes can be made within the range.

また、この発明において、シート成形品としては、例示
した納豆用の包装容器のほか、種々の食品その他の物品
の収納用包装容器等、更には、従来より使用されている
各種の、ヒンジ部付きシート成形品に自由に適用できる
ものである。
Further, in the present invention, sheet molded products include not only the illustrated packaging container for natto, but also packaging containers for storing various foods and other products, and various conventionally used packaging containers with hinged parts. It can be freely applied to sheet molded products.

〈発明の効果〉 以上のように、上記第1の発明の構成のヒンジ部の成形
方法によれば、例えば、成形用型間に位置ズレが生じた
りして、受け側の成形用型に支承されている発泡シート
に偏った押圧力がかけられても、発泡シートを弾力的に
挾み込むことになるので、その押圧力の一部を吸収可能
とし、押し側の成形用型の発泡シートへの偏った押圧力
を均一状にすることができる。これにより、例えば、ヒ
ンジ部を構成する折曲溝の仕上げ形状のバラッキを防止
することができ、成型過程におけるヒンジ部の成形不良
を減少させることができる。
<Effects of the Invention> As described above, according to the method for forming the hinge part having the configuration of the first invention, for example, positional deviation occurs between the molding molds, and the supporting molding is not supported by the molding mold on the receiving side. Even if an uneven pressing force is applied to the foam sheet, the foam sheet is elastically sandwiched between the sheets, so that part of the pressing force can be absorbed. The uneven pressing force can be made uniform. Thereby, for example, it is possible to prevent variations in the finished shape of the bending grooves constituting the hinge portion, and it is possible to reduce molding defects of the hinge portion during the molding process.

そして、受け側の成形用型に支承されている発泡シート
に押し側の成形用型より過剰な押圧力がかけられても、
上記弾性挟持機能によりこの過剰な押圧力の一部を吸収
することができる。これにより、ヒンジ部における発泡
シートの剪断を防止することができ、所望形状のヒンジ
部の成形を図りると共に、所定成形品の歩留まりを高め
ることができるという特有の効果を奏する。
Even if an excessive pressing force is applied to the foam sheet supported by the receiving mold, compared to the pushing mold,
A portion of this excessive pressing force can be absorbed by the elastic clamping function. Thereby, it is possible to prevent the foam sheet from being sheared at the hinge portion, and it is possible to mold the hinge portion in a desired shape, and it is possible to achieve the unique effect of increasing the yield of a predetermined molded product.

また、上記第2の発明のヒンジ部の成形用型によれば、
押し型及び受け型を型閉めしたとき、その間に挾み込ん
だ発泡シートのヒンジ部の形成部分を弾力的に押圧成形
することができるので、上記第1の発明のヒンジ部の成
形方法において必要とされる成形を確実に行なうことが
できるという特有の効果を奏する。
Moreover, according to the mold for forming the hinge part of the second invention,
When the press mold and the receiving mold are closed, the hinge part forming portion of the foam sheet sandwiched between them can be elastically press-molded, which is necessary in the method for forming the hinge part of the first invention. It has the unique effect of being able to reliably perform the molding described above.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図及び第2図は雄型、雌型を示し、この発明の一実
施例に係るヒンジ部の成形方法及び成形用型を装備した
ものであって、第1図は型閉め前の断面図、第2図は型
閉め後の断面図、第3図及び第4図は成形用型の変形例
を示す断面図、 第5図及び第6図はヒンジ部の成形方法及び成形用型を
備えた雄型、雌型により製造された包装用容器を示し、
第5図はその開蓋状態における断面図、第6図は閉蓋状
態における断面図、第7図及び第8図は従来の雄型、雌
型を示し、第7図は型閉め前の断面図、第8図は型閉め
後の断面図。 (1]・・・包装用容器    (4)・・・ヒンジ部
(13)・・・押し型     (14’)・・・受け
型(15)・・・弾性部材 (Sl)・・・発泡シート 第3図 II 第4図
1 and 2 show a male mold and a female mold, which are equipped with a hinge molding method and molding mold according to an embodiment of the present invention, and FIG. 1 is a cross-sectional view of the mold before closing. Figures 2 and 2 are cross-sectional views after closing the mold, Figures 3 and 4 are cross-sectional views showing modified examples of the mold, and Figures 5 and 6 show the method of molding the hinge part and the mold. It shows a packaging container manufactured by a male mold and a female mold equipped with
Figure 5 is a cross-sectional view of the lid in the open state, Figure 6 is a cross-sectional view of the lid in the closed state, Figures 7 and 8 show the conventional male and female molds, and Figure 7 is the cross-section before the mold is closed. Figure 8 is a sectional view after the mold is closed. (1)...Packaging container (4)...Hinge part (13)...Press mold (14')...Receiving mold (15)...Elastic member (Sl)...Foam sheet Figure 3 II Figure 4

Claims (1)

【特許請求の範囲】 1、熱可塑性樹脂の発泡シートを加圧成形して、複数の
折曲溝を有するヒンジ部を成形するヒンジ部の成形方法
において、 一対の成形用型間にて、上記発泡シートを弾性的に挾み
込んで加圧成形することを特徴とするヒンジ部の成形方
法。 2、熱可塑性樹脂の発泡シートに、複数の折曲溝を有す
るヒンジ部を加圧成形するヒンジ部の成形用型であって
、 互いに対向して設けられる押し型と受け型とを具備し、 上記押し型又は受け型のいずれか一方の対向表面を、上
記複数の折曲溝に対応する凹凸形状に形成すると共に、 上記押し型及び受け型の少なくとも何れか一方は、加圧
成形時に弾性収縮可能な弾性部材により支承されてなる
ことを特徴とするヒンジ部の成形用型。
[Scope of Claims] 1. A method for forming a hinge portion in which a foamed sheet of thermoplastic resin is pressure-molded to form a hinge portion having a plurality of bending grooves, in which the above-mentioned A method for forming a hinge portion, which is characterized by elastically sandwiching a foam sheet and forming it under pressure. 2. A mold for molding a hinge part for pressure-molding a hinge part having a plurality of bending grooves on a foamed sheet of thermoplastic resin, comprising a pressing mold and a receiving mold provided opposite to each other, The facing surface of either the press mold or the receiving mold is formed into an uneven shape corresponding to the plurality of bending grooves, and at least one of the pressing mold and the receiving mold is elastically contracted during pressure molding. 1. A mold for forming a hinge portion, the mold being supported by a flexible elastic member.
JP30355086A 1986-12-18 1986-12-18 Molding method of hinge part and its mold Granted JPS63154329A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30355086A JPS63154329A (en) 1986-12-18 1986-12-18 Molding method of hinge part and its mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30355086A JPS63154329A (en) 1986-12-18 1986-12-18 Molding method of hinge part and its mold

Publications (2)

Publication Number Publication Date
JPS63154329A true JPS63154329A (en) 1988-06-27
JPH0360657B2 JPH0360657B2 (en) 1991-09-17

Family

ID=17922354

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30355086A Granted JPS63154329A (en) 1986-12-18 1986-12-18 Molding method of hinge part and its mold

Country Status (1)

Country Link
JP (1) JPS63154329A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011500386A (en) * 2007-10-23 2011-01-06 エルペツェ、ベボ−プラスティク、ゲゼルシャフト、ミット、ベシュレンクテル、ハフツング Method for producing thermoformed article and instrument for its production
ITPD20100285A1 (en) * 2010-09-24 2012-03-25 Scatolificio Gondola Triveneto Srl PLANT FOR THE REALIZATION OF COVERS, FULL OR SEPARATE WITH RESPECT TO THE CONTAINER WHICH IS INTENDED TO COVER

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011500386A (en) * 2007-10-23 2011-01-06 エルペツェ、ベボ−プラスティク、ゲゼルシャフト、ミット、ベシュレンクテル、ハフツング Method for producing thermoformed article and instrument for its production
ITPD20100285A1 (en) * 2010-09-24 2012-03-25 Scatolificio Gondola Triveneto Srl PLANT FOR THE REALIZATION OF COVERS, FULL OR SEPARATE WITH RESPECT TO THE CONTAINER WHICH IS INTENDED TO COVER

Also Published As

Publication number Publication date
JPH0360657B2 (en) 1991-09-17

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