JPS61237621A - Blow molding split molding device for bent product - Google Patents

Blow molding split molding device for bent product

Info

Publication number
JPS61237621A
JPS61237621A JP60078401A JP7840185A JPS61237621A JP S61237621 A JPS61237621 A JP S61237621A JP 60078401 A JP60078401 A JP 60078401A JP 7840185 A JP7840185 A JP 7840185A JP S61237621 A JPS61237621 A JP S61237621A
Authority
JP
Japan
Prior art keywords
split
mold
parts
main part
split molds
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
JP60078401A
Other languages
Japanese (ja)
Other versions
JPH0412210B2 (en
Inventor
Ushigoro Sumitomo
住友　丑五郎
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP60078401A priority Critical patent/JPS61237621A/en
Publication of JPS61237621A publication Critical patent/JPS61237621A/en
Publication of JPH0412210B2 publication Critical patent/JPH0412210B2/ja
Granted legal-status Critical Current

Links

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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/48—Moulds
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/4242—Means for deforming the parison prior to the blowing operation
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/04—Extrusion blow-moulding
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/4242—Means for deforming the parison prior to the blowing operation
    • B29C49/42421—Means for deforming the parison prior to the blowing operation before laying into the mould
    • B29C49/42422—Means for deforming the parison prior to the blowing operation before laying into the mould by the preform transporting means
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/4242—Means for deforming the parison prior to the blowing operation
    • B29C49/4244—Means for deforming the parison prior to the blowing operation during or after laying preform into the final mould
    • B29C49/42452—The mould opening plane being horizontal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/004—Bent tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To enable insertion molding by preventing generation of a protruded stripe, groove and crack on the hollow inside of a molded article, by forming a quarter surface of the top side of a main part of a cavity of a bent mold formed on a parting surface is formed on the upper part of a split mold and a quarter surface of the lower side is formed on the lower part of the split mold. CONSTITUTION:When movable platens 4, 4 and split molds 5, 5' are moved in a closing direction through driving of hydraulic cylinders 24, 24 and lower parts 7, 7 of the split molds are closed, a holding hole E is formed by closing a lower half surface (c) of a main part of a mold cavity opening toward the upper part and half surfaces (e), (e) of insert parts holding holes by lower quater surfaces (c), (c) of the main part of the mold cavity. A nozzle 26 provided with a seat plate 27 of insert parts are inserted into the holding hole E. The upper half surface of the main part of the mold cavity is formed of quarter surfaces (a), (a) of the main part of the mold cavity of the upper part of both the split molds, the main part of the mold porosity in a U-shaped cylindrical state is formed of the same along with the lower half surface (c) of the lower part of the split mold, both end parts of the mold porosity are formed of half surfaces (b), (b), (b), (b) of both the end parts of the mold cavity of the upper parts (b), (b) of both the split molds and a parison P is wrapped in the mold cavity.

Description

【発明の詳細な説明】 （産業上の利用分野） 本願発明は、Ｕ字形、Ｌ字形、Ｓ字形等の屈曲形状の合
成樹脂製品の吹成成形に使用される割型装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a split mold device used for blow molding synthetic resin products having a bent shape such as a U-shape, an L-shape, or an S-shape.

（従来の技術） 従来、上記のような屈曲形状の合成樹脂製品を吹成成形
する場合は、屈曲製品に対応する屈曲した型巣の半面を
それぞれ有する一対の割型を該割型の閉成及び開放のた
め水平方向に相対的移動自在に支持した割型装置を使用
し、開放された一対の割型の間に、上記屈曲型巣の水平
方向の最大中とほぼ等しい直径の太いパリソンを降下さ
せ、ついで一対の割型を閉じて両割型間に上記パリソン
を挟着すると共に該パリソン内にエアを吹きこんで吹成
成形する方法が行われている。しかし、この従来方法で
は、一対の割型の開成タイミングの設定が容易でなく、
閉成タイミングが速いと、得られた成形品の中空内面に
パーティングラインに沿った突条ができ、開成タイミン
グが遅いと、同様の個所に溝ができたり、裂は目が生じ
る。一方、従来の割型装置では、パーティングラインの
位置に突出するインサート部品を成形品に取付ける場合
、一対の割型のパーティング面に所要インサート部品を
保持する穴の半面をそれぞれ形成しておき、一対の割型
が開いている時に一方の割型の保持穴半面にインサート
部品を保持させるようにしているが、割型閉成時の振動
等によりインサート部品が保持穴半面から脱落すること
が多く、これを防止するためインサート部品を粘着テー
プで保持穴半面に貼りつける等の煩わしい手段が必要と
なっていた。(Prior Art) Conventionally, when blow molding a synthetic resin product with a bent shape as described above, a pair of split molds each having a bent half of the mold cavity corresponding to the bent product is closed. Then, for opening, a split mold device supported relatively movably in the horizontal direction is used, and between the pair of opened split molds, a thick parison with a diameter approximately equal to the horizontal maximum of the bent mold nest is placed. The parison is lowered, then a pair of split molds are closed, the parison is sandwiched between the two split molds, and air is blown into the parison to perform blow molding. However, with this conventional method, it is not easy to set the opening timing of the pair of split molds.
If the closing timing is too fast, ridges along the parting line will be formed on the hollow inner surface of the resulting molded product, while if the opening timing is too late, grooves or cracks will appear at similar locations. On the other hand, with conventional split mold devices, when attaching an insert part that protrudes to the parting line position to a molded product, half of the hole for holding the required insert part is formed on the parting surface of a pair of split molds. When a pair of split molds are open, the insert part is held in one half of the holding hole of one of the split molds, but the insert part may fall out of the half of the holding hole due to vibrations when the split molds are closed. In many cases, in order to prevent this, cumbersome measures such as pasting the insert part on half of the holding hole with adhesive tape are required.

（発明が解決しようとする問題点） 本願第１発明は、屈曲型巣の径よりも細いパリソンを使
用することができ、それにより割型閉成タイミングに遅
速があっても成形品の中空内面に突条や溝、裂は目を生
じさせることがない屈曲製品の吹成成形用割型装置を提
供することを目的とする。(Problems to be Solved by the Invention) The first invention of the present application allows the use of a parison that is thinner than the diameter of the bent mold cavity. The object of the present invention is to provide a split mold device for blow molding bent products that does not cause protrusions, grooves, or cracks.

本願第２発明は、第１発明の目的に加え、パーティング
ラインの位置に突出するインサート部品を成形品に取付
ける場合に所要インサート部品を所定位置に確実に保持
してインサート成形を行うことができる屈曲製品の吹成
成形用割型装置を提供することを目的とする。In addition to the object of the first invention, the second invention of the present application is capable of performing insert molding by reliably holding the required insert part in a predetermined position when attaching the insert part protruding to the position of the parting line to the molded product. The object of the present invention is to provide a split mold device for blow molding bent products.

（問題点を解決するための手段） 上記目的を達成するため、本願第１発明は、一対の割型
が割型閉成及び開放のため互に水平方向に相対的移動自
在に支持され、上記一対の割型は、上下に分割され且互
に独立して水平方向に移動自在の割型上部及び割型下部
の２部分からそれぞれなり、それら２部分の複合パーテ
ィング面に形成された屈曲製品のための屈曲型巣の半面
のうち、屈曲型巣の両端部の半面及びそれと連続する屈
曲型巣の主部の上側４分の１面が上記割型上部に、上記
屈曲型巣の主部の下側４分の１面が上記割型下部にそれ
ぞれ形成された、 構成とし、 本願第２発明は、第１発明の構成に加えて、上記一対の
割型下部のパーティング面にインサート部品保持穴の半
面がそれぞれ形成された、構成としである。(Means for Solving the Problems) In order to achieve the above object, the first invention of the present application is such that a pair of split molds are supported so as to be relatively movable in the horizontal direction for closing and opening the split molds, and the above-mentioned A pair of split molds each consists of two parts, an upper split mold and a lower split mold, which are divided into upper and lower parts and are movable horizontally independently of each other, and a bent product is formed on the composite parting surface of these two parts. Of the half surfaces of the curved nest, half of both ends of the curved nest and the upper quarter surface of the main part of the curved nest continuous therewith are placed on the upper part of the split mold, and the main part of the curved nest is The second invention of the present application has a configuration in which a lower quarter surface of is formed on each of the lower portions of the split molds, and the second invention of the present application provides, in addition to the configuration of the first invention, an insert part on the parting surfaces of the lower parts of the pair of split molds. This configuration is such that each half of the holding hole is formed.

以下図面を参照して本発明の詳細な説明する。The present invention will be described in detail below with reference to the drawings.

第１．２図において、ベッド（１）上に定盤（２）　、
（２）を適宜間隔をあけて互に平行に起立固定し、両定
盤（２）　、　（２）間に４本のスライドロッド（３）
・・・を水平に支架すると共に、該スライドロッド（３
）・・・に一対の可動盤（４）、（４）を水平方向に摺
動自在に支持させ、両回動盤（４）、（４）の相対向す
る面に一対の割型（５）、（５）′　を取付けである。In Figure 1.2, a surface plate (2) is placed on the bed (1),
(2) are fixed in an upright position parallel to each other at appropriate intervals, and both surface plates (2) and four slide rods (3) are placed between (2).
... horizontally, and the slide rod (3
)... supports a pair of movable plates (4), (4) so as to be slidable in the horizontal direction, and a pair of split molds (5) are mounted on opposing surfaces of both rotary plates (4), (4). ), (5)′ is the installation.

（２４）、（２４）は上記定盤（２）、（２）に水平に
固定された油圧シリンダで、そのラム（２５）、（２５
）を可動盤（４）、（４）に固定してあり、該シリンダ
（２４）、（２４）の進退駆動により一対の割型（５）
、（５）′を閉成及び開放させるために水平方向に相対
的に移動できるようにしである。(24), (24) are hydraulic cylinders horizontally fixed to the above-mentioned surface plates (2), (2), and their rams (25), (25
) are fixed to movable plates (4), (4), and the pair of split molds (5) are moved forward and backward by the cylinders (24), (24).
, (5)' are relatively movable in the horizontal direction for closing and opening.

上記割型（５）、（５）′は上下に分割された割型上部
（６）及び割型下部（７）の２部分からそれぞれなり、
その複合パーティング面に、第３図示のように本例では
Ｕ字形中空円筒製品を成形するためのＵ字形円筒型巣の
半面（Ｓ）をそれぞれ形成しである。上記一方の割型上
部（６）は、第４図示のようにフランジ部（８）から脚
部（９）を垂直に突出する丁字形ブロックに、他方の割
型下部（７）は上記脚部（９）と嵌合する上向き開口の
溝部（１０）を有するコ字形ブロックにそれぞれ形成さ
れ、その一方の割型上部（６）の脚部（９）におけるパ
ーティング面がわの二字状に連続する稜線部分に、上記
Ｕ字形円筒型巣の主部の横断面における上側４分の１面
（ａ）を形成すると共に、フランジ部（８）のパーティ
ング面に、上記Ｕ字形円筒型巣の両端部の半面（ｂ）、
（ｂ）を、上記型巣主部の上側４分の１面（ａ）の両端
部とそれぞれ連続させて形成しである。他方の割型下部
（７）のコ字状溝部（１０）におけるパーティング面が
わのコ字状に連続する稜線部分に、上記Ｕ字形円筒型巣
の主部の横断面における下側４分の１面（ｅ）を形成し
である。この割型上部（６）及び下部（７）が、その脚
部（９）を溝部（１０）内に嵌合させてそのパーティン
グ面を一平面上に合致させると、Ｕ字形円筒型巣半面（
Ｓ）を形成する。The split molds (5) and (5)' each consist of two parts, an upper split mold (6) and a lower split mold (7), which are divided into upper and lower parts,
In this example, half surfaces (S) of a U-shaped cylindrical nest for molding a U-shaped hollow cylindrical product are respectively formed on the composite parting surface, as shown in the third figure. One split mold upper part (6) is a T-shaped block with legs (9) vertically protruding from the flange part (8) as shown in the fourth figure, and the other split mold lower part (7) is a T-shaped block with legs (9) projecting vertically from the flange part (8) as shown in the fourth figure. (9) and a U-shaped block having an upwardly opening groove (10) that fits into the upper part (9), and the parting surface of the leg (9) of the upper part (6) of one of the split molds has a two-shape The upper quarter surface (a) in the cross section of the main part of the U-shaped cylindrical nest is formed on the continuous ridgeline portion, and the U-shaped cylindrical nest is formed on the parting surface of the flange portion (8). half of both ends (b),
(b) are formed so as to be continuous with both ends of the upper quarter surface (a) of the mold cavity main portion. The parting surface of the U-shaped groove (10) of the other split mold lower part (7) is connected to the ridgeline part that continues in a U-shape along the lower quarter of the cross section of the main part of the U-shaped cylindrical nest. This forms one side (e) of. When the split upper part (6) and lower part (7) fit their leg parts (9) into the groove parts (10) and their parting surfaces are aligned on one plane, the U-shaped cylindrical nest half surface is formed. (
S) is formed.

（ｄ）は割型上部（６）のパーティング面に形成された
ブロービン挟持孔半面で、上記一方の型巣端部半面（ｂ
）と連通して割型上部の上面に開通している。(d) is the half surface of the blow bin holding hole formed on the parting surface of the split mold upper part (6), and the half surface (b
) and opens on the upper surface of the upper part of the split mold.

本例ではＵ字形中空円筒製品の主部にパーティングライ
ンの位置に突出する例えばノズルをインサート部品とし
て取付けるため、割型下部（７）のパーティング面にイ
ンサート部品保持式半面（ｅ）を形成しである。In this example, in order to attach, for example, a nozzle that protrudes at the position of the parting line to the main part of the U-shaped hollow cylindrical product as an insert part, an insert part holding type half surface (e) is formed on the parting surface of the lower part of the split mold (7). It is.

他方の割型（５）′　も上述と同一の構造である。The other split mold (5)' also has the same structure as described above.

上記のような割型（５）、（５）′の支持構造は次のよ
うである。一方の割型（５）についてみると、第１．２
．３図において一方の可動盤（４）の対向面にベース板
（１３）を固定し、該ベース板（１３）の対向面の上部
に上記割型上部（６）をそのパーティング面を開成方向
へ向けて固定すると共に、下部に上記割型上部（６）と
水平中の等しい支持板（１４）を該割型上部（６）と平
行に突設し、これら割型上部（６）と支持板（１４）の
間に割型下部（７）を、その溝部（１０）と割型上部の
脚部（９）を摺動自在に嵌合させた状態で水平方向に摺
動自在に支持させると共に、上記ベース板（１３）の対
向面に水平に突設されたガイドロッド（１５）・・・を
割型下部（７）に貫通した水平方向のガイド孔（１６）
・・・に摺動自在に挿通し、さらに上記割型下部（７）
の背面とベース板（１３）との間に設けたコイルバネ（
１７）・・・により割型下部（７）を常時開成方向へ弾
発するとともに、フックストッパー（１８）　、（１８
）により該割型下部（７）を常時は割型上部（６）より
も開成方向へ少くともその型巣主部の下側４分の１面（
Ｑ）の深さ以上の距離突出するように制御している。上
記フックストッパー（１８）、（１８）は、割型下部の
両側面に設けた水平方向の溝（１９）　、　（１９）内
に先端カギ部（２０）、（２０）　（第２図）を摺動自
在に係合した状態で、ストッパー基部をベース板（１３
）に固定され、そのカギ部（２０）、（２０）を溝（１
９）、（１９）内の段部（２１）、（２１）　　（第２
図）に係止することにより上記制御を行っている。The support structure for the split molds (5) and (5)' as described above is as follows. Looking at one split mold (5), the 1.2
．． In Fig. 3, a base plate (13) is fixed to the opposing surface of one movable platen (4), and the above-mentioned split mold upper part (6) is attached to the upper part of the opposing surface of the base plate (13) with its parting surface facing in the opening direction. At the same time, a support plate (14) which is horizontal and equal to the split mold upper part (6) is provided at the lower part and protrudes parallel to the split mold upper part (6), and these split mold upper parts (6) and The lower part of the split mold (7) is supported slidably in the horizontal direction between the plates (14) with its groove (10) and the legs (9) of the upper part of the split mold slidably fitted. At the same time, a guide rod (15) horizontally protruding from the opposite surface of the base plate (13) is provided with a horizontal guide hole (16) passing through the split mold lower part (7).
It is slidably inserted into ..., and then the lower part of the split mold (7)
A coil spring (
17) ... constantly springs the split mold lower part (7) in the opening direction, and the hook stoppers (18), (18
), the lower part of the mold (7) is always moved in the opening direction than the upper part of the mold (6) at least on the lower quarter of the main part of the mold cavity (
It is controlled to protrude a distance greater than the depth of Q). The hook stoppers (18), (18) have tip hooks (20), (20) (Fig. 2) inside the horizontal grooves (19), (19) provided on both sides of the lower part of the split mold. In the slidably engaged state, the stopper base is attached to the base plate (13
), and the key parts (20), (20) are fixed to the grooves (1
9), stepped portions (21) in (19), (21) (second
The above-mentioned control is performed by locking in the position shown in FIG.

他方の割型（５）″の支持構造も上記と同一である。な
お各割型上部及び下部の内部には通常の冷却ジャケット
が設けられている。The support structure of the other split mold (5)'' is also the same as above. Note that a normal cooling jacket is provided inside the upper and lower parts of each split mold.

上記一対の割型（５）、（５）′の閉成時におけるブロ
ーピン挟持孔半面（ｄ）、（ｄ）をもつ型巣端部半面（
ｂ）、（ｂ）の上方に第３図示のように押出機の押出ダ
イ（２２）が配設され、該押出ダイ（２２）の中心部か
ら進退自在に垂下したブロービン（２３）は、上記ブロ
ーピン挟持孔半面（ｄ）、（ｄ）よりも若干下まで進出
できるようにしである。When the above-mentioned pair of split molds (5) and (5)' are closed, the mold nest end half surface (
An extrusion die (22) of an extruder is disposed above (b) and (b) as shown in the third figure, and a blowbin (23) that hangs freely forward and backward from the center of the extrusion die (22) is connected to the above-mentioned The blow pin clamping hole half surface (d) is designed so that it can advance slightly below the hole (d).

本装置の作用を次に説明する。第１．２図の状態から油
圧シリンダ（２４）、（２４）の駆動により可動盤（４
）、（４）及び割型（５）、（５）′を閉成方向へ移動
させ、割型下部（７）、（７）が閉じた時上記移動を一
旦停止する。上記割型下部（７）、（７）の開成により
、第５図示のようにその型巣主部の下側４分の１面（ｃ
）、（ｃ）が連続して上方へ開口するＵ字形型巣主部下
側半面（ｃ）を。The operation of this device will be explained next. From the state shown in Figure 1.2, the movable platen (4) is driven by the hydraulic cylinders (24) and (24).
), (4) and the split molds (5), (5)' are moved in the closing direction, and when the lower parts of the split molds (7), (7) are closed, the above movement is temporarily stopped. By opening the split mold lower parts (7), (7), the lower quarter surface (c
), (c) shows the lower half of the U-shaped nest host that opens continuously upward (c).

及びインサート部品保持式半面（ｅ）、（ｅ）が閉成し
て保持穴（Ｅ）をそれぞれ形成する。そこで、まず第７
図示のようなインサート部品として座板（２７）つきノ
ズル（２６）を上記保持穴（Ｅ）内に挿入すると共にそ
の座板（２７）で保持穴“（Ｅ）の開口を覆う。上記ノ
ズル（２６）は最終成形時まで保持穴（Ｅ）内に確実に
保持される。次に、押出ダイ（２２）からチューブ状パ
リソン（Ｐ）の押出しを開始すると共にブロービン（２
３）からエアを少量づつ吹き出させる。パリソン（Ｐ）
が割型下部（７）、（７）近くまで押出されたら、該パ
リソン（Ｐ）の下端部を作業員の手又は適宜の機械的把
持具（１）で把持して徐々に側方へ移動させて該パリソ
ン（Ｐ）をＵ字状にたるませつつ第６図示のように該た
るんだパリソンを上記Ｕ字形型巣主部下側半面（Ｃ）内
にのぞませる。上記のたるんだパリソン（Ｐ）は、本例
では先端部を上記把持によって密封され、その密封内に
ブロービン（２３）からエアを吹きこまれることによっ
て当初の中空チューブ状をほぼ維持する。しかし合成樹
脂の種類パリソンの溶融程度、成形品の形状等によって
は、パリソン内にエアを吹きこまずにパリソン先端部を
開放状態に把持して型巣主部下側半面内に導くこともで
きる。and the insert part holding type halves (e), (e) are closed to form holding holes (E), respectively. Therefore, first, the seventh
A nozzle (26) with a seat plate (27) as shown in the figure is inserted into the holding hole (E) and the seat plate (27) covers the opening of the holding hole (E). 26) is reliably held in the holding hole (E) until the final molding.Next, extrusion of the tubular parison (P) is started from the extrusion die (22) and the blow bin (2
3) Blow out air little by little. Parison (P)
When the parison (P) is extruded to near the lower part of the mold (7), (7), the lower end of the parison (P) is grasped by the worker's hand or an appropriate mechanical gripper (1), and the parison (P) is gradually moved to the side. While the parison (P) is made to sag in a U-shape, the sagging parison is exposed into the lower half (C) of the U-shaped nest main body as shown in the sixth figure. In this example, the saggy parison (P) is sealed at its tip by the grip, and air is blown into the seal from the blow bin (23) to maintain its original hollow tube shape. However, depending on the type of synthetic resin, the degree of melting of the parison, the shape of the molded product, etc., it is also possible to hold the tip of the parison in an open state and guide it into the lower half of the mold cavity main body without blowing air into the parison.

次に、油圧シリンダ（２４）、（２４）の再駆動により
割型（５）、（５）′をさらに閉成方向へ移動させると
、一対の割型上部（６）、　（６）が閉じ、まずブロー
ビン挟持孔半面（ｄ）、（ｄ）でブロービン（２３）を
挟持しつつパリソン（Ｐ）のブロービンがわ基部及び先
端部をシールし、又１両割型上部の型巣主部４分の１面
（ａ）、（ａ）が連続して型巣主部上側半面を形成し、
該上側半面と上記割型下部の下側半面（Ｃ）とでＵ字形
円筒状の型巣主部を形成すると共に、両割型上部（６）
、（６）の型巣両端部半面（ｂ）　（ｂ）、（ｂ）（ｂ
）が連続して円筒状の型巣両端部を形成し、これらＵ字
形型巣主部と型巣両端部とが連続して所期のＵ字形円筒
状型巣を形成し、その型巣内に上記パリソン（Ｐ）を包
みこむ。Next, when the split molds (5), (5)' are further moved in the closing direction by re-driving the hydraulic cylinders (24), (24), the upper parts of the pair of split molds (6), (6) are closed. First, seal the base and tip of the blowbin side of the parison (P) while holding the blowbin (23) with the blowbin holding hole halves (d) and (d), and also seal the mold cavity main part 4 of the upper part of the split mold. 1 side (a), (a) continuously form the upper half of the mold nest main part,
The upper half surface and the lower half surface (C) of the lower part of the split mold form a U-shaped cylindrical mold nest main part, and the upper part of both split molds (6)
, (6) Both ends of the mold cavity (b) (b), (b) (b
) continuously form both ends of the cylindrical mold nest, and these U-shaped mold nest main parts and both ends of the mold cavity continuously form the desired U-shaped cylindrical mold nest, and inside the mold nest. Wrap the above parison (P) in.

次に、ブロービン（２３）からエアを型巣内のパリソン
内に吹きこんで該パリソンをふくらませ、所期の吹成成
形を行う。Next, air is blown into the parison in the mold cavity from the blow bin (23) to inflate the parison and perform the desired blow molding.

成形後、パリソンの基部を押出ダイ（２２）から切断し
、油圧シリンダ（２４）、（２４）の駆動により割型（
５）、（５）′を開いて成形品を取り出す。After molding, the base of the parison is cut from the extrusion die (22), and the split mold (
5), (5)' Open and take out the molded product.

上記の割型内に包みこんだパリソンを吹成成形するため
のブロービンは、上側のものに限らず、割型上部（６）
又は割型下部（７）の外側面に、先端を針状にしたブロ
ービンを割型を貫通して内部に進退自在に取付け、該ブ
ロービンをパリソン内に刺しこんでエアを吹きこむよう
にした構造のものも使用できる。The blowbin for blow-molding the parison wrapped in the above-mentioned split mold is not limited to the upper one;
Alternatively, a blow bottle with a needle-shaped tip is attached to the outer surface of the lower part of the split mold (7) so that it can move forward and backward into the inside of the split mold, and the blow bin is inserted into the parison to blow air into it. You can also use things.

（発明の効果） 本願第１発明の屈曲製品の吹成成形用割型装置によれば
、屈曲製品の横断面における径よりも細いパリソンを使
用することができ、それにより割型閉成タイミングに遅
速があっても成形品の中空内面に突条や溝、裂は目が＝
１２− できることを防止し、良質の屈曲成形品を得ることがで
きるようになり、又パリソンを型巣内へ供給する操作に
おいては、一対の割型下部を閉じたときにその一対の屈
曲型巣主部下側４分の１面により形成される上方へ開口
する屈曲型巣主部下側半面内に、押出ダイから押出され
るパリソンを上からたるませつつのぞませ、つ）Ｎで割
型上部を閉じることにより上記パリソンを屈曲型巣内に
確実容易に包みこむことができるのである。(Effects of the Invention) According to the split mold device for blow molding bent products of the first invention of the present application, it is possible to use a parison that is thinner than the diameter in the cross section of the bent product, thereby adjusting the split mold closing timing. Even at slow speeds, there are no protrusions, grooves, or cracks on the hollow inner surface of the molded product.
12- It is now possible to obtain a high-quality bent molded product by preventing the occurrence of molding, and in the operation of feeding the parison into the mold cavity, when the lower part of the pair of split molds is closed, the pair of bent mold cavities The parison extruded from the extrusion die is allowed to sag from above in the upwardly opening bent-shaped nest main lower half surface formed by the lower quarter surface of the main main body. By closing the parison, the parison can be reliably and easily enclosed within the bent nest.

本願第２発明の屈曲製品の吹成成形用割型装置によれば
、上記第１発明の効果に加え、パーティングラインの位
置に突出するインサート部品を成形品に取付ける場合、
割型下部を閉じたときにその一対のインサート部品保持
式半面により保持穴を形成することができ、それにより
該保持穴内−所期のインサート部品を挿入することによ
り最終吹成成形時まで確実に保持することができ、又イ
ンサート部品を保持穴内に挿入する操作においては、該
インサート部品保持穴が、一対の割型下部を閉じた時に
形成される上方へ開口する屈曲型巣主部下側半面内に開
口しているので、挿入操作を容易に行うことができる利
点もあるのである。According to the split mold device for blow molding a bent product according to the second invention of the present application, in addition to the effects of the first invention, when attaching the insert part protruding to the parting line position to the molded product,
When the lower part of the split mold is closed, a holding hole can be formed by the pair of insert part holding halves, so that the desired insert part can be inserted into the holding hole securely until the final blow molding. In addition, in the operation of inserting the insert part into the holding hole, the insert part holding hole is inside the lower half surface of the bent-shaped nest main body which opens upward and is formed when the lower parts of the pair of split molds are closed. Since the opening is open, there is also the advantage that the insertion operation can be performed easily.

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

図面は本願発明の実施例を示し、第１図は吹成成形機の
一部切欠正面図、第２図は同上平面図、第３図は第１図
の■−■線断面図、第４図は一対の割型の分離状態の路
線斜面図、第５図は一対の割型下部の開成状態の路線斜
面図、第６図はパリソン供給状態の路線側面図、第７図
はインサート部品の拡大斜面図である。 ５．５′・・・割型、６・・・割型上部、７・・・割型
下部、Ｓ・・・Ｕ字形型巣の半面、ａ・・・Ｕ字形型巣
主部の上側４分の１面、ｂ・・・Ｕ字形型巣両端部の半
面、Ｃ・・・Ｕ字形型巣主部の下側４分の１面、ｅ・・
・インサート部品保持穴の半面。The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway front view of a blow molding machine, FIG. 2 is a plan view of the same, FIG. 3 is a sectional view taken along the line ■-■ of FIG. The figure is a line slope view of a pair of split molds in a separated state, Figure 5 is a line slope view of the lower part of a pair of split molds in an open state, Figure 6 is a line side view of a parison being supplied, and Figure 7 is a line side view of the insert parts. It is an enlarged slope view. 5.5'... split mold, 6... split mold upper part, 7... split mold lower part, S... half side of U-shaped nest, a... upper side of main part of U-shaped nest 4 1 side, b...half side of both ends of the U-shaped nest, C...lower quarter side of the main part of the U-shaped nest, e...
・Half side of the insert part holding hole.

Claims (2)

【特許請求の範囲】[Claims] （１）一対の割型が割型閉成及び開放のため互に水平方
向に相対的移動自在に支持され、 上記一対の割型は、上下に分割され且互 に独立して水平方向に移動自在の割型上部 及び割型下部の２部分からそれぞれなり、 それら２部分の複合パーティング面に形成 された屈曲製品のための屈曲型巣の半面の うち、屈曲型巣の両端部の半面及びそれと 連続する屈曲型巣の主部の上側４分の１面 が上記割型上部に、上記屈曲型巣の主部の 下側４分の１面が上記割型下部にそれぞれ 形成された、 屈曲製品の吹成成形用割型装置。(1) A pair of split molds are supported so as to be relatively movable in the horizontal direction for closing and opening the split molds, and the pair of split molds are divided into upper and lower parts and move horizontally independently of each other. It consists of two parts, a freely split upper part and a split part lower part, and among the half faces of the bending part for bending products formed on the composite parting surface of these two parts, the half faces of both ends of the bending part and An upper quarter surface of the main part of the bent nest that is continuous therewith is formed on the upper part of the split mold, and a lower quarter surface of the main part of the bent nest that is continuous with the bent nest is formed on the lower part of the split mold. Split mold device for blow molding products. （２）一対の割型が割型閉成及び開放のため互に水平方
向に相対的移動自在に支持され、 上記一対の割型は、上下に分割され且互 に独立して水平方向に移動自在の割型上部 及び割型下部の２部分からそれぞれなり、 それら２部分の複合パーティング面に形成 された屈曲製品のための屈曲型巣の半面の うち、屈曲型巣の両端部の半面及びそれと 連続する屈曲型巣の主部の上側４分の１面 が上記割型上部に、上記屈曲型巣の主部の 下側４分の１面が上記割型下部にそれぞれ 形成され、 上記一対の割型下部のパーティング面に、 その４分の１面型巣と連通するインサート 部品保持穴の半面がそれぞれ形成された、 屈曲製品の吹成成形用割型装置。(2) A pair of split molds are supported so as to be relatively movable in the horizontal direction for closing and opening the split molds, and the pair of split molds are divided into upper and lower parts and move horizontally independently of each other. It consists of two parts, a freely split upper part and a split part lower part, and among the half faces of the bending part for bending products formed on the composite parting surface of these two parts, the half faces of both ends of the bending part and An upper quarter surface of the main part of the bent nest which is continuous thereto is formed on the upper part of the split mold, and a lower quarter surface of the main part of the bent nest is formed on the lower part of the split mold. A split mold device for blow-molding bending products, in which half of an insert part holding hole communicating with a quarter surface mold cavity is formed on the parting surface of the lower part of the split mold.
JP60078401A 1985-04-15 1985-04-15 Blow molding split molding device for bent product Granted JPS61237621A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60078401A JPS61237621A (en) 1985-04-15 1985-04-15 Blow molding split molding device for bent product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60078401A JPS61237621A (en) 1985-04-15 1985-04-15 Blow molding split molding device for bent product

Publications (2)

Publication Number Publication Date
JPS61237621A true JPS61237621A (en) 1986-10-22
JPH0412210B2 JPH0412210B2 (en) 1992-03-03

Family

ID=13661000

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60078401A Granted JPS61237621A (en) 1985-04-15 1985-04-15 Blow molding split molding device for bent product

Country Status (1)

Country Link
JP (1) JPS61237621A (en)

Also Published As

Publication number Publication date
JPH0412210B2 (en) 1992-03-03

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