JPH0620565B2 - Multi-hole tube extrusion die - Google Patents

Multi-hole tube extrusion die

Info

Publication number
JPH0620565B2
JPH0620565B2 JP63111282A JP11128288A JPH0620565B2 JP H0620565 B2 JPH0620565 B2 JP H0620565B2 JP 63111282 A JP63111282 A JP 63111282A JP 11128288 A JP11128288 A JP 11128288A JP H0620565 B2 JPH0620565 B2 JP H0620565B2
Authority
JP
Japan
Prior art keywords
die
molding
forming
gap
partition wall
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 - Fee Related
Application number
JP63111282A
Other languages
Japanese (ja)
Other versions
JPH01284423A (en
Inventor
国男 大久保
正己 須藤
忠昭 森田
信夫 稲葉
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.)
Showa Aluminum Can Corp
Original Assignee
Showa Aluminum Corp
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 Showa Aluminum Corp filed Critical Showa Aluminum Corp
Priority to JP63111282A priority Critical patent/JPH0620565B2/en
Publication of JPH01284423A publication Critical patent/JPH01284423A/en
Publication of JPH0620565B2 publication Critical patent/JPH0620565B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【発明の詳細な説明】 産業上の利用分野 この発明は、カークーラー用コンデンサやラジエータ等
の熱交換器における冷媒流通管として使用される偏平多
穴管等を製造するための、多穴管の押出用ダイスに関す
る。
Description: TECHNICAL FIELD The present invention relates to a multi-hole pipe for manufacturing a flat multi-hole pipe or the like used as a refrigerant flow pipe in a heat exchanger such as a condenser for a car cooler or a radiator. The present invention relates to an extrusion die.

従来の技術 例えば、上記のような偏平多穴管、即ち第7図に示すよ
うに、中空部内を仕切壁(101 )によって多数の中空孔
(102 )に仕切られた偏平管(100 )の押出しは、一般
にダイス雄型とダイス雌型との組合せからなるポートホ
ールダイスを用いて行われる。
2. Description of the Related Art For example, a flat multi-hole tube as described above, that is, as shown in FIG. 7, extrusion of a flat tube (100) having a hollow portion partitioned by a partition wall (101) into a large number of hollow holes (102). Is generally performed using a porthole die which is a combination of a male die and a female die.

このような多穴管の押出用ダイスは、一般に、ダイス雄
型に中空孔(102 )を形成するための複数の突片を、仕
切壁(101 )の肉厚に対応する間隔を隔てて突出形成す
るとともに、これら中空孔形成用突片の先端を、ダイス
雌型の成形開口部に配置することにより構成される。そ
して中空孔形成用突片相互間の成形間隙及び中空孔形成
用突出片とダイス雌型の成形開口部間に形成された成形
間隙から成形材料を押出して多穴管(100 )を得るもの
となされている。
In such a multi-hole tube extrusion die, generally, a plurality of projecting pieces for forming a hollow hole (102) in a male die are projected at intervals corresponding to the wall thickness of the partition wall (101). While being formed, the tips of the hollow hole forming projections are arranged in the molding opening of the female die. Then, the molding material is extruded from the molding gap between the hollow hole forming protrusions and the molding gap formed between the hollow hole forming protrusion and the molding opening of the female die to obtain the multi-hole pipe (100). Has been done.

発明が解決しようとする課題 ところが、従来の多穴管押出用ダイスでは、押出圧力に
よる成形材料のダイス成形間隙への流れ込み、特にダイ
ス雄型の中空孔形成用突片相互間に形成された仕切壁形
成用成形間隙への流れ込みが十分ではなく、このため往
々にして第8図に拡大して示すように、多穴管(100 )
の仕切壁(101 )に中央薄肉部(101a)を生じ易く、意
図する設計どおりの形状、肉厚が得られないという欠点
があった。このような欠点は、昨今の熱交換器の軽量、
小型、高性能化の要請に伴い、多穴管(100 )が薄肉多
穴化されるにつれ、より顕著に生じるものであった。ま
た、押出速度を遅くすることで成形材料の流れ込みをあ
る程度は改善しうるが、この場合には生産性が低下する
という別の欠点を派生するものであった。
However, in the conventional multi-hole tube extrusion die, the molding material flows into the die molding gap due to the extrusion pressure, and particularly the partition formed between the male male hollow hole forming projections. Insufficient flow into the wall forming gaps, and as such is often seen in the enlarged view of Figure 8, a multi-hole tube (100)
The partition wall (101) is liable to have a central thin portion (101a), so that the intended shape and thickness as designed cannot be obtained. Such a drawback is due to the light weight of recent heat exchangers,
This became more remarkable as the multi-hole pipe (100) was made thinner and multi-hole in response to the demand for smaller size and higher performance. Further, slowing down the extrusion speed can improve the flow of the molding material to some extent, but in this case, another drawback such as a decrease in productivity was derived.

この発明はかかる欠点を解消するためになされたもので
あって、特に仕切壁に関し、押出速度を低下させること
なく肉厚不良を解消して意図する肉厚を有する多穴第を
得ることを目的とし、このためにダイスを改良せんとす
るものである。
The present invention has been made in order to solve such a drawback, and particularly relates to a partition wall, and an object thereof is to eliminate defective wall thickness without lowering the extrusion speed to obtain a multi-hole first having an intended wall thickness. Therefore, the die is improved for this purpose.

課題を解決するたための手段 上記目的を達成するために、この発明は、中空孔形成用
突片相互間の仕切壁形成用成形間隙に向かって傾斜する
成形材料案内溝を設け、もって成形材料の該成形間隙へ
の十分な流れ込みを確保したものである。
Means for Solving the Problems In order to achieve the above object, the present invention provides a molding material guide groove that is inclined toward a partition wall forming molding gap between hollow hole forming projections, thereby providing a molding material This ensures a sufficient flow into the molding gap.

即ちこの発明に係る多穴管の押出用ダイスは、図面の符
号を参照して示せば、仕切壁形成用の成形間隙(30)を
隔てて列設された複数の中空孔形成用突片(11)を有す
るダイス有型(1)と、前記中空孔形成用突片が配置さ
れる成形開口部(21)を有するダイス雄型(2)との組
合せからなる多穴管の押出用ダイスにおいて、前記ダイ
ス雄型(1)に、中空孔形成用突片(11)相互間の仕切
壁形成用成形間隙(30)の後方位置に、該成形間隙の高
さ方向の中間部に向かって傾斜する成形材料案内溝(1
8)が設けられていることを特徴とするものである。
That is, the extrusion die for a multi-hole pipe according to the present invention has a plurality of hollow hole forming protrusions (a plurality of hollow hole forming protrusions arranged in a row with a partition wall forming gap (30) therebetween, as shown with reference to the drawings. A die for extruding a multi-hole pipe, which comprises a die mold (1) having 11) and a male die (2) having a molding opening (21) in which the hollow hole forming projection is arranged. , The die male mold (1) is inclined to the rear of the partition wall forming molding gap (30) between the hollow hole forming protrusions (11) toward the middle portion in the height direction of the molding gap. Molding material guide groove (1
8) is provided.

作 用 押出加工時にラム等の押圧により、成形材料はダイスの
中空孔形成用突片(11)の相互間の仕切壁形成用間隙
(30)、及び中空孔形成用突片(11)の外側の外周壁形
成用成形間隙(40)へと流れ込む。ダイス雄型(1)に
は、仕切壁形成用成形間隙(30)の後方位置に、該成形
間隙の高さ方向の中間部へと向かう案内溝(18)が設け
られているから、この溝に沿って成形材料は前記仕切壁
形成用成形間隙(30)へと案内され、流れ込んで行く。
During molding, the molding material is pressed by a ram or the like during extrusion processing, so that the molding material is formed between the hollow hole forming projections (11) of the die and the partition wall forming gap (30) and the outside of the hollow hole forming projection (11). Flows into the molding gap (40) for forming the outer peripheral wall. Since the male die (1) is provided with a guide groove (18) at a position rearward of the partition wall forming molding gap (30), the guide groove (18) heading to the middle portion in the height direction of the molding gap. The molding material is guided and flows into the partition wall forming molding gap (30) along.

実 施 例 以下この発明の構成を、第7図に示す熱交換器用偏平多
穴管(100 )の押出用ダイスに適用した実施例に基いて
説明する。
Example Hereinafter, the structure of the present invention will be described based on an example applied to an extrusion die for a flat multi-hole tube (100) for a heat exchanger shown in FIG.

第1図〜第6図に示すダイス(A)は、ダイヤ雄型
(1)とダイス雌型(2)とにより構成されている。
The die (A) shown in FIGS. 1 to 6 is composed of a diamond male die (1) and a die female die (2).

ダイス雄型(1)は断面円形の基盤からなり、その一端
側に段差部(13)を介して突出状の嵌合部(14)が形成
されいている。そして該嵌合部の中央に、断面長円形状
の凹部(15)が形成されるとともに、この凹部(15)を
長軸方向に横断する配置に成形凸部(12)が形成されて
いる。この成形凸部(12)は、偏平管(100 )の中空孔
(102 )を形成するための中空孔成形用突片(11)(1
1)…が複数個直線状に列設されてなるものであり、各
突片(11)はその先端ベアリング部(16)が、偏平管
(100 )の仕切壁(101 )の肉厚に相当する仕切壁形成
用成形間隙(30)をもって離間した配置状態に設けられ
ている。また成形凸部(12)の厚さ方向の両面におい
て、各中空部形成用突片(11)の中間から先端にかけて
の部分は、両面相互が接近する方向のテーパー面となさ
れてアプローチ部(17)が形成されるとともに、隣接中
空部形成用突片間には同じく上下両側に、成形凸部の基
端部から仕切壁形成用成形間隙(30)の高さ方向(偏平
管の幅方向)の中間部に向かって傾斜する断面方形の案
内溝(18)が刻設されている。この案内溝の傾斜角度は
この実施例の場合、水平面に対して15〜20゜程度に
設定されている。そしてこれらこれらアプローチ部(1
7)及び案内溝(18)により、成形凸部(12)の厚さ方
向の両側に貫通状に形成された成形材料導入孔(50)か
ら流れ込んだ成形材料を、仕切壁形成用成形間隙(30)
及び外周壁形成用成形間隙(40)へと容易に導きうるも
のとなされている。なお、前記導入孔(50)は、コンテ
ナ側において上下隔壁(19a )(19b )によりそれぞれ
2個合計4個の孔に分割されたものとなされている。
The male die (1) is composed of a base having a circular cross section, and a protruding fitting portion (14) is formed on one end side thereof via a step portion (13). A recess (15) having an oval cross section is formed in the center of the fitting portion, and a molding protrusion (12) is formed in a position that traverses the recess (15) in the longitudinal direction. The forming projection (12) is provided with a hollow hole forming projection (11) (1) for forming the hollow hole (102) of the flat tube (100).
1) ... are arranged in a line in a straight line, and the tip bearing portion (16) of each protrusion (11) corresponds to the wall thickness of the partition wall (101) of the flat tube (100). The partition wall forming molding gaps (30) are provided so as to be separated from each other. Further, on both sides of the molding convex portion (12) in the thickness direction, a portion from the middle to the tip of each hollow portion forming projection (11) is formed as a tapered surface in a direction in which the both surfaces approach each other, and the approach portion (17 ) Is formed on the upper and lower sides of the adjacent hollow forming projections, and the height direction of the partition wall forming molding gap (30) from the base end of the molding convex portion (width direction of the flat tube). A guide groove (18) having a rectangular cross section that is inclined toward the middle part of the is formed. In the case of this embodiment, the inclination angle of the guide groove is set to about 15 to 20 ° with respect to the horizontal plane. And these these approach parts (1
The molding material flowing through the molding material introduction hole (50) formed in a penetrating shape on both sides in the thickness direction of the molding convex portion (12) by the guide groove (18) and the guide groove (18) allows the molding gap for forming the partition wall ( 30)
And the molding gap (40) for forming the outer peripheral wall can be easily led. The introduction hole (50) is divided into two holes by the upper and lower partition walls (19a) and (19b) on the container side into a total of four holes.

一方、ダイス雌型(2)は、これも断面円形の基盤から
なるもので、一端側にダイス雄型(1)の嵌合部(14)
を嵌合しうる嵌合凹部(22)が形成されるとともに、該
嵌合凹部の中央に、ダイス雄型の凹部(15)に対応する
長円形状の凹部(23)が形成されている。さらにこの凹
部(23)の中央に、偏平管(100 )の外周形状に対応す
る大きさの成形開口部(21)が形成されている。そして
この成形開口部(21)の周面がベアリング部(24)とな
されるとともに、成形開口部に連通する断面漸増の貫通
孔が形成されてレリーフ部(25)となされている。
On the other hand, the die female die (2) is also composed of a base with a circular cross section, and has a fitting portion (14) for the die male die (1) on one end side.
Is formed with a fitting recess (22), and an oval recess (23) corresponding to the die male recess (15) is formed at the center of the fitting recess. Further, a molding opening (21) having a size corresponding to the outer peripheral shape of the flat tube (100) is formed in the center of the recess (23). The peripheral surface of the molding opening (21) serves as a bearing portion (24), and a through hole having a gradually increasing cross section that communicates with the molding opening is formed to serve as a relief portion (25).

而して、ダイス(A)はダイス雄型(1)の凹部(15)
とダイス雌型(2)の凹部(23)とを合致させる配置に
して雄型の嵌合部(14)を雌型の嵌合凹部(22)に嵌合
し固定することにより構成されている。この組合せ状態
においては、ダイス雄型(1)の成形凸部(12)先端即
ち中空孔形成用突片(11)の先端部が雌型ダイス(2)
の成形開口部(21)内に臨んで、第5図に示すように、
ダイス雌型(2)のベアリング部(24)と中空孔形成用
突片(11)のベアリング部(16)との間に偏平管(100
)の外周壁の肉厚に相当する外周壁形成用成形間隙(4
0)が形成されるとともに、中空孔形成用突片(11)の
相互間には、仕切壁形成用成形間隙(30)が存在するも
のとなされている。
Thus, the die (A) is the concave portion (15) of the die male die (1).
And the concave portion (23) of the female die (2) of the die are aligned with each other, and the male fitting portion (14) is fitted and fixed in the female fitting concave portion (22). . In this combined state, the tip of the molding convex portion (12) of the die male die (1), that is, the tip of the hollow hole forming projection (11) is the female die (2).
As shown in FIG. 5, facing the molding opening (21) of
A flat pipe (100) is provided between the bearing portion (24) of the female die (2) and the bearing portion (16) of the hollow hole forming projection (11).
) Outer peripheral wall forming molding gap (4
0) is formed, and a partition wall forming gap (30) is present between the hollow hole forming protrusions (11).

上記実施例のダイス(A)では、コンテナ(図示せず)
から送られた流動状のアルミニウム等の成形材料は、ダ
イス雄型(1)の4個の導入孔(50)に入ったのち、成
形凸部(12)の両側の導入孔でそれぞれ合流し、さらに
第3図に矢印(X)で示すように、成形凸部(12)周囲
へと流れ込んで行く。
In the die (A) of the above embodiment, a container (not shown)
The fluid molding material such as aluminum sent from the above enters the four introduction holes (50) of the male die (1), and then merges at the introduction holes on both sides of the molding convex portion (12). Further, as indicated by an arrow (X) in FIG. 3, the material flows into the periphery of the molding convex portion (12).

成形凸部(12)周囲へと流れ込んだ成形材料は、各中空
孔形成用突片(11)のアプローチ部(17)と案内溝(1
8)を案内されてその十分な量が成形間隙(30)(40)
へと送られ、該成形間隙を通過して多穴偏平管(100 )
として押出される。
The molding material that has flowed into the periphery of the molding convex portion (12) is guided by the approach portion (17) of each hollow hole forming projection (11) and the guide groove (1).
8) Guided through the molding gap (30) (40)
Multi-hole flat tube (100)
Is extruded as.

なお上記実施例では、成形材料案内溝(18)の形状を断
面方形としたが、溝形状は特に限定されるものではな
く、例えば第6図に示すように、断面台形としても良
い。また基端部から仕切壁形成用成形間隙へと近づくに
従って溝の断面積が変化する態様のものに形成しても良
い。
Although the molding material guide groove (18) has a rectangular cross section in the above embodiment, the shape of the groove is not particularly limited, and may have a trapezoidal cross section as shown in FIG. 6, for example. Alternatively, the groove may have a cross-sectional area that changes as it approaches the partition wall forming gap.

発明の効果 この発明は上述の次第で、ダイス雄型に、中空孔形成用
突片相互間の仕切壁形成用成形間隙の後方位置に、該成
形間隙の高さ方向の中間部に向かって傾斜する成形材料
案内溝が設けられているから、押出時にこの案内溝によ
って成形材料を仕切壁形成用間隙へと確実に案内するこ
とができ、十分な量の成形材料を該成形間隙へと送り込
むことができる。従って、成形材料の流れ込み不足によ
る多穴管の仕切壁の肉厚不良を防止でき、意図した肉厚
を有する多穴管を得ることができる。しかも成形材料を
仕切壁形成用成形間隙へ十分送り込むために従来のよう
に押出速度を遅くする必要もなくなるから、押出速度の
向上を図りえて生産効率の向上をも期待できる。
EFFECTS OF THE INVENTION As described above, according to the present invention, the die male mold is inclined toward the rear of the partition wall forming molding gap between the hollow hole forming protrusions toward the middle portion in the height direction of the molding gap. Since the molding material guide groove is provided, the molding material can be reliably guided to the partition wall forming gap by the guide groove during extrusion, and a sufficient amount of the molding material can be fed into the molding gap. You can Therefore, it is possible to prevent defective wall thickness of the partition wall of the multi-hole pipe due to insufficient flow of the molding material, and to obtain a multi-hole pipe having an intended wall thickness. Moreover, since it is not necessary to slow down the extrusion speed as in the conventional case in order to sufficiently feed the molding material into the molding gap for forming the partition wall, it is possible to expect the improvement of the extrusion speed and the improvement of the production efficiency.

【図面の簡単な説明】[Brief description of drawings]

第1図〜第6図はこの発明の一実施例を示すもので、第
1図はダイス雄型とダイス雌型とを分離して示す斜視
図、第2図は成形凸部の一部を示す拡大斜視図、第3図
はダイス雄型とダイス雌型とを組合わせた状態での第1
図のIII−III線断面図、第4図は第2図のIV−IV線断面
図、第5図は第3図のV−V線断面図、第6図は成形材
料案内溝の形状の変形例を示すもので、第4図に対応す
る図、第7図は偏平多穴管の斜視図、第8図は従来のダ
イスによって押出した多穴管の仕切壁近傍を示す拡大正
面図である。 (A)……ダイス、(1)……ダイス雄型、(11)……
中空孔形成用突片、(18)……成形材料案内溝、(2)
……ダイス雌型、(21)……成形開口部、(30)……仕
切壁形成用成形間隙、(100 )……偏平多穴管、(101
)……仕切壁、(102 )……中空孔。
1 to 6 show an embodiment of the present invention. FIG. 1 is a perspective view showing a male die and a female die separately, and FIG. 2 shows a part of a molding convex portion. FIG. 3 is an enlarged perspective view showing a first die in a state where a male die and a female die are combined.
FIG. 4 is a sectional view taken along line III-III of FIG. 4, FIG. 4 is a sectional view taken along line IV-IV of FIG. 2, FIG. 5 is a sectional view taken along line VV of FIG. 3, and FIG. FIG. 7 is a view showing a modification, FIG. 7 is a perspective view of a flat multi-hole pipe, and FIG. 8 is an enlarged front view showing the vicinity of a partition wall of a multi-hole pipe extruded by a conventional die. is there. (A) …… Dice, (1) …… Male die, (11) ……
Hollow hole forming protrusion, (18) …… Molding material guide groove, (2)
...... Die female mold, (21) …… Molding opening, (30) …… Molding gap for partition wall formation, (100) …… Flat multi-hole tube, (101
) …… Partition wall, (102) …… hollow hole.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 稲葉 信夫 大阪府堺市海山町6丁224番地 昭和アル ミニウム株式会社内 (56)参考文献 特開 昭63−97309(JP,A) 実公 昭59−2889(JP,Y1) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuo Inaba 6-224 Kaiyama-cho, Sakai City, Osaka Prefecture Showa Aluminum Co., Ltd. -2889 (JP, Y1)

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】仕切壁形成用の成形間隙(30)を隔てて列
設された複数の中空孔形成用突片(11)を有するダイス
雄型(1)と、前記中空孔形成用突片が配置される成形
開口部(21)を有するダイス雌型(2)との組合せから
なる多穴管の押出用ダイスにおいて、前記ダイス雄型
(1)に、中空孔形成用突片(11)相互間の仕切壁形成
用成形間隙(30)の後方位置に、該成形間隙の高さ方向
の中間部に向かって傾斜する成形材料案内溝(18)が設
けられていることを特徴とする多穴管の押出用ダイス。
A die male mold (1) having a plurality of hollow hole forming projections (11) arranged in a row with a molding gap (30) for forming a partition wall, and the hollow hole forming projections. In a die for extrusion of a multi-hole pipe, which comprises a die female die (2) having a molding opening (21) in which a hollow is formed, a hollow hole forming projection (11) is provided on the die male die (1). A molding material guide groove (18) inclined toward an intermediate portion in the height direction of the molding gap is provided at a rear position of the molding gap (30) for forming partition walls. Die for extrusion of hole tube.
JP63111282A 1988-05-06 1988-05-06 Multi-hole tube extrusion die Expired - Fee Related JPH0620565B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63111282A JPH0620565B2 (en) 1988-05-06 1988-05-06 Multi-hole tube extrusion die

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63111282A JPH0620565B2 (en) 1988-05-06 1988-05-06 Multi-hole tube extrusion die

Publications (2)

Publication Number Publication Date
JPH01284423A JPH01284423A (en) 1989-11-15
JPH0620565B2 true JPH0620565B2 (en) 1994-03-23

Family

ID=14557276

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63111282A Expired - Fee Related JPH0620565B2 (en) 1988-05-06 1988-05-06 Multi-hole tube extrusion die

Country Status (1)

Country Link
JP (1) JPH0620565B2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09174141A (en) * 1995-12-22 1997-07-08 Yano Eng:Kk Die for extrusion of metal hollow material
WO2003035293A1 (en) * 2001-10-23 2003-05-01 Showa Denko K.K. Extrusion die for manufacturing tube with small hollow portions, mandrel used for said extrusion die, and multi-hollowed tube manu-factured by using said extrusion die
JP4824499B2 (en) * 2006-08-03 2011-11-30 株式会社神戸製鋼所 Die design method, die, hollow panel manufacturing method, and hollow panel
JP5227972B2 (en) 2006-12-11 2013-07-03 オハイオ ユニバーシティ Apparatus and method for extruding a microchannel tube
JP5773586B2 (en) * 2010-06-30 2015-09-02 三菱アルミニウム株式会社 Extrusion die, extrusion die apparatus, and extrusion part manufacturing method
JP6254074B2 (en) * 2014-12-22 2017-12-27 日本軽金属株式会社 Extrusion dies for forming flat multi-hole tubes

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS592889U (en) * 1982-06-28 1984-01-10 株式会社ハウテック door
JPS6397309A (en) * 1986-10-13 1988-04-28 Nippon Light Metal Co Ltd Production of clad pipe

Also Published As

Publication number Publication date
JPH01284423A (en) 1989-11-15

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