JPH0486235A - Core pin for mold - Google Patents

Core pin for mold

Info

Publication number
JPH0486235A
JPH0486235A JP20113490A JP20113490A JPH0486235A JP H0486235 A JPH0486235 A JP H0486235A JP 20113490 A JP20113490 A JP 20113490A JP 20113490 A JP20113490 A JP 20113490A JP H0486235 A JPH0486235 A JP H0486235A
Authority
JP
Japan
Prior art keywords
heat
core pin
cavity
boss
tip
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
JP20113490A
Other languages
Japanese (ja)
Other versions
JP2716250B2 (en
Inventor
Takashi Arai
隆 新井
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.)
Ikegami Mold Engineering Co Ltd
Original Assignee
Ikegami Mold Engineering 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 Ikegami Mold Engineering Co Ltd filed Critical Ikegami Mold Engineering Co Ltd
Priority to JP2201134A priority Critical patent/JP2716250B2/en
Publication of JPH0486235A publication Critical patent/JPH0486235A/en
Application granted granted Critical
Publication of JP2716250B2 publication Critical patent/JP2716250B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/72Heating or cooling
    • B29C45/73Heating or cooling of the mould
    • B29C45/7337Heating or cooling of the mould using gas or steam

Landscapes

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

Abstract

PURPOSE:To enable the thick wall such as a boss to be cooled and solidified in short time by a method in which the pin body of a core pin is formed of a hollow pipe, and the wick operating capillary action and its operational oil are sealed in said pipe, and then the heat absorbing part at the tip and the heat radiating part at the base end of the pin body are formed. CONSTITUTION:When heated and molten resin is injected from a skin injection port 5 by an injection molding machine, a cavity 4 and the cavity 7 for a boss are filled with molten resin. Simultaneously with the finish of the filling with molten resin, when the cooling medium such as cooling water is caused to flow through the path 20 of cooling medium, the base end 17 of a core pin 14 is cooled in a cavity 19. On one hand, the tip 16 of the core pin 14 is inserted into the cavity 7 for the boss, and the tip 16 is formed in heat absorbing part and the base end 17 is formed in heat radiating part. When the heat absorbing part is heated, the operational liquid contained in a wick is vaporized by taking the latent heat of evaporation, and the pressure in the head absorbing part becomes higher than that of the heat radiating part. By said pressure-difference, the steam moves to the heat radiating part at high speed, and the steam is cooled and condensed at the heat radiating part, whereby the equivalent latent heat of condensation to the latent heat at its evaporation is radiated.

Description

【発明の詳細な説明】 [発明の目的] (産業上の利用分野) この発明は、成形品の一部に中空のボス等を有する成形
品を成形する場合に用いられる成形金型用コアピンに関
する。
Detailed Description of the Invention [Object of the Invention] (Industrial Application Field) The present invention relates to a core pin for a molding die used when molding a molded product having a hollow boss etc. in a part of the molded product. .

(従来の技術) 例えば、テレビ、電気掃除機等の電気機器の合成樹脂製
のキャビネットは、射出成形用金型によって一体成形さ
れているが、この種のキャビネットは、キャビネット主
体の内面に多数のボスが設けられる。これらボスはプリ
ント基板や電気部品を取付ける取付は台として用いられ
る。したがって、通常はキャビネットを成形すると同時
にボスに取付は穴か設けられ、中空のボスが成形される
。そして、成形後にこの取付は穴′に雌ねじを刻設し、
プリント基板や電気部品を取付けねじによって固定して
いる。
(Prior art) For example, synthetic resin cabinets for electrical appliances such as televisions and vacuum cleaners are integrally molded using injection molds. A boss will be provided. These bosses are used as mounting stands for mounting printed circuit boards and electrical components. Therefore, mounting holes are usually provided in the boss at the same time as the cabinet is molded, and a hollow boss is molded. After molding, a female thread is carved into the hole for this installation.
Printed circuit boards and electrical components are fixed with mounting screws.

このようにボスを有するキャビネットを射出成形する成
形用金型は、固定金型と可動金型との間に成形品の主体
を形成するキャビティが設けられ、可動金型に前記キャ
ビティと連通ずるボス用キャビティか設けられている。
A mold for injection molding a cabinet having a boss in this manner is provided with a cavity forming the main body of the molded product between a fixed mold and a movable mold, and a boss communicating with the cavity in the movable mold. There is a cavity for

さらに、可動金型に前記ボス用キャビティの内部に先端
部が挿入されるコアピンが設けられ、このコアピンの外
側にスリブが嵌合されている。
Further, the movable mold is provided with a core pin whose tip end is inserted into the boss cavity, and a sleeve is fitted on the outside of the core pin.

したがって、成形品としてのキャビネットの主体部分は
薄肉であるが、ボス部分は肉厚となり、ボス部分はキャ
ビネットの主体部分より固化するのか遅くなる。そこで
、ボス部分を集中して冷却するために、ボス用キャビテ
ィの周辺に冷却水等の冷却媒体通路を設け、ボス部分の
樹脂か固化する時間をキャビネット主体部分の樹脂が固
化する時間に近イ」けるようにしている。しかし、ボス
はキャビネットの内周面に近接していたり、またボスの
外周にこれを補強するために複数のリブを設けた構造の
ものにおいては冷却媒体通路を近接して設けることはで
きない。したがって、ボスのように肉厚部を有する成形
品においては成形サイクル時間か長くなっているのか実
状である。
Therefore, although the main part of the cabinet as a molded product is thin, the boss part is thick, and the boss part solidifies more slowly than the main part of the cabinet. Therefore, in order to centrally cool the boss part, a cooling medium passage such as cooling water is provided around the boss cavity so that the time for the resin in the boss part to solidify is close to the time for the resin in the main body part of the cabinet to solidify. ” However, if the boss is located close to the inner circumferential surface of the cabinet, or if a plurality of ribs are provided on the outer periphery of the boss to reinforce the boss, the cooling medium passage cannot be provided close to the boss. Therefore, the actual situation is that the molding cycle time is longer for molded products having thick parts such as bosses.

また、従来においては、前述のように問題を解消するた
めに、実開昭63−6154号公報、実開平1−850
14号公報および実開平185015号公報に示すよう
に、ボス等の肉厚部を集中して冷却する構造のものか提
案されている。
In addition, in the past, in order to solve the above-mentioned problem, the following methods have been proposed:
As shown in Japanese Unexamined Patent Publication No. 14 and Japanese Utility Model Application No. 185015, a structure has been proposed that concentrates cooling on thick parts such as bosses.

すなわち、実開昭63−6 ]、 54号公報は、中子
ピンに冷却穴を設け、この冷却穴に連通ずる冷却パイプ
を設けて冷却媒体を流通するように構成したものである
。また、実開平1−85014号公報は、成形品の肉厚
部を強制冷却する冷却ピンを設け、金型を一次冷却した
後、金型を開き、この状態で、前記冷却ピンの先端部か
ら冷却用エアーを前記肉厚部に吹付けるように(7たも
のである。
That is, in Utility Model Application Publication No. 63-6], No. 54, a core pin is provided with a cooling hole, and a cooling pipe communicating with the cooling hole is provided to allow a cooling medium to flow therethrough. In addition, Utility Model Application Publication No. 1-85014 discloses that cooling pins are provided to forcibly cool the thick part of the molded product, and after the mold is primarily cooled, the mold is opened, and in this state, from the tip of the cooling pin, Cooling air is blown onto the thick part (7).

さらに、実開平1−85015号公報は、ボス等の筒状
部に挿入されるコアピンの外側にスリーブを嵌合し、こ
のスリーブの中途部に冷却用エアー通路と連通ずる冷却
用エアー流通孔を設けてコアピンを強制冷却するように
したものである。
Furthermore, Japanese Utility Model Application Publication No. 1-85015 discloses that a sleeve is fitted on the outside of a core pin inserted into a cylindrical part such as a boss, and a cooling air circulation hole communicating with a cooling air passage is provided in the middle of the sleeve. It is designed to forcibly cool the core pin.

(発明が解決しようとする課題) ところか、前述の実開昭63−6154号公報の中子ピ
ンの冷却構造は、中子ピンの冷却穴に連通ずる冷却パイ
プを設けて冷却水または冷却用エアーを循環する構造で
あり、接続部のシール構造か後着1となり、また実開平
1−8501.4号公報は、ホス等の肉厚部にその外周
から冷却エアを吹イ;jける構造であるため、冷却効率
か悪く、冷却エアーのノズルまでの距離か長くなると、
冷却エアーの温度かL昇して十分に冷却できない。さら
に実開平1−8501.5号公報はコアピンの中途部を
冷却し、コアピンの熱伝導によってボスを冷却する構造
であり、コアピンの先端部の近傍を冷却しないと冷却効
率か悪いが、冷却用エアー通路をコアピンの先端部の近
傍に設けることが設計上困難な場合が多い。
(Problem to be Solved by the Invention) However, the core pin cooling structure of the above-mentioned Utility Model Application Publication No. 63-6154 has a cooling pipe that communicates with the cooling hole of the core pin, so that cooling water or a cooling pipe is provided. It is a structure that circulates air, and the sealing structure of the connection part is used as a later attachment.In addition, Japanese Unexamined Utility Model Publication No. 1-8501.4 has a structure that blows cooling air from the outer periphery to the thick part of the host etc. Therefore, if the cooling efficiency is poor and the distance to the cooling air nozzle is long,
The temperature of the cooling air has risen by L and cannot be cooled sufficiently. Furthermore, Utility Model Application Publication No. 1-8501.5 has a structure in which the middle part of the core pin is cooled and the boss is cooled by heat conduction of the core pin. In many cases, it is difficult to provide an air passage near the tip of the core pin due to design considerations.

この発明は、前記↓j[情に桁目してなされたもので、
その目的とするところは、加熱溶融樹脂が充填されるキ
ャビティの内部に挿入され、コアを形成するコアピンの
先端部を効率よく冷却してボス等の肉厚部においても短
時間に冷却して固化させることかでき、成形金型の冷却
通路を簡素化できる成形金型用コアピンを提供すること
にある。
This invention was made in response to the above-mentioned
The purpose of this is to efficiently cool the tip of the core pin that is inserted into the cavity filled with heated molten resin and form the core, and to quickly cool and solidify even thick parts such as bosses. It is an object of the present invention to provide a core pin for a molding die that can simplify the cooling passage of the molding die.

[発明の構成] (課題を解決するための手段及び作用)この発明は、前
述した目的を達成するために、加熱溶融樹脂か充填され
るキャビティの内部に先端部を挿入してコアを形成する
成形金型用コアピンのピン本体を中空パイプによって形
成し、このピン本体の内部に毛細管作用をなすウィック
と作動液を封入し、前記先端部に吸熱部、基端部に放熱
部を形成したヒートパイプによって形成したことにある
[Structure of the Invention] (Means and Effects for Solving the Problem) In order to achieve the above-mentioned object, the present invention forms a core by inserting a tip into a cavity filled with heated molten resin. The core pin for molding molds has a pin body formed from a hollow pipe, a wick that acts as a capillary tube and a working fluid sealed inside the pin body, and a heat absorbing part at the tip and a heat radiating part at the base end. It is formed by a pipe.

ヒートパイプの原理によってコアピンの吸熱部で吸熱し
て放熱部で放熱するとともに、この放熱部を冷却媒体に
よって冷却することにより、コアピンの先端部でボス等
の肉厚部を短時間に冷却できる。
By using the principle of a heat pipe, heat is absorbed in the heat absorbing part of the core pin, and heat is radiated in the heat radiating part, and by cooling this heat radiating part with a cooling medium, thick parts such as bosses can be cooled in a short time at the tip of the core pin.

(実施例) 以下、この発明の各実施例を図面に基づいて説明する。(Example) Embodiments of the present invention will be described below based on the drawings.

第1図〜第3図は第1の実施例を示すもので、第2図は
射出成形用金型の全体図である。]は金金型体で、これ
は固定金型2と可動金型3および両全型2,3間に形成
され、成形品の主体4aを形成するキャビティ4とから
構成されている。固定金型2の中央部にはキャビティ4
に連通ずる樹脂注入口5を有するスプールブツシュ6か
設けられている。また、可動金型3の一部には前記成形
品の一部にホス7aを形成するボス用キャビティ7が前
記キャビティ4に連通して設けられている。
1 to 3 show a first embodiment, and FIG. 2 is an overall view of an injection mold. ] is a metal mold body, which is composed of a fixed mold 2, a movable mold 3, and a cavity 4 formed between the two full molds 2, 3 and forming the main body 4a of the molded product. There is a cavity 4 in the center of the fixed mold 2.
A spool bushing 6 having a resin inlet 5 communicating with the spool bushing 6 is provided. Further, a boss cavity 7 is provided in a part of the movable mold 3 so as to communicate with the cavity 4 and form a host 7a in a part of the molded product.

前記可動金型3には枠体8を介して可動側型板9か設け
られ、枠体8によって囲繞される空間部]0にはエジェ
クタプレート1]が設けられている。エジェクタプレー
トコ]には円筒パイプからなるエジェクタ筒12の基端
部か固定され、TIJ動金型金型3方向出している。す
なわち、可動金型3には前記ボス用キャビティ7と同軸
的に穿設された貫通穴]3が設けられている。そして、
この貫通穴13には前記エジェクタ筒12か軸方向に進
退自在に挿入され、その先端面は、第3図に示すように
ボス7aの先端面に当接している。さらに、エジェクタ
筒]2の内部にはヒートパイプからなるコアピン14か
挿入されている。
A movable mold plate 9 is provided on the movable mold 3 via a frame 8, and an ejector plate 1 is provided in a space [0] surrounded by the frame 8. The base end of an ejector tube 12 made of a cylindrical pipe is fixed to the ejector plate, and extends from three directions of the TIJ moving mold. That is, the movable mold 3 is provided with a through hole 3 coaxially bored with the boss cavity 7. and,
The ejector cylinder 12 is inserted into the through hole 13 so as to be freely advanced and retracted in the axial direction, and its end surface is in contact with the end surface of the boss 7a, as shown in FIG. Furthermore, a core pin 14 made of a heat pipe is inserted into the inside of the ejector tube]2.

コアピン14は、第1図に示すように、パイプによって
形成されたピン本体15の先端部16は小径に形成され
、基端部17にはフランジ部18か設けられている。こ
のピン本体]5の内部には基端部17側から毛細管作用
をなすウィックと作動液か封入され、その基端開口を盲
板1.5 aによって月11することにより密封されて
いる。ずなゎぢ、コアピン14はヒートパイプに形成さ
れ、その先端部]6が吸熱部に、基端部17が放熱部に
形成されている。
As shown in FIG. 1, the core pin 14 has a pin main body 15 formed of a pipe, with a tip end 16 having a small diameter, and a base end 17 provided with a flange portion 18. A wick and a working fluid are sealed inside the pin body 5 from the proximal end 17 side, and the proximal opening is sealed by a blind plate 1.5a. The core pin 14 is formed into a heat pipe, with its distal end 6 serving as a heat absorbing part and its base end 17 serving as a heat radiating part.

このように構成されたコアピン14はエジェクタ筒12
の内部に挿入され、その基端側は前記エジェクタプレー
1−11および可動側型板9を貫通しており、基端部コ
アは可動側型板9に固定されている。そして、コアピン
14の先端部16は前記ボス用キャビティ7の内部まで
延長され、その中心部に挿入されてボス7aに取付は穴
7bが形成されるようになっている。さらに、コアピン
14の基端部17を囲繞するように前記可動側型板9に
は空dliJ部]9か設けられ、この空洞部19は可動
側型板9に穿設された冷却水路等の冷却媒体通路20に
連通している。ずなわぢ、この冷却媒体通路20には冷
却水等の冷却媒体が流通し、空洞部]9においてコアピ
ン]4の基端部]7を冷却するようになっている。なお
、21はOリングである。
The core pin 14 configured in this way is attached to the ejector tube 12.
The proximal end thereof passes through the ejector plate 1-11 and the movable mold plate 9, and the proximal core is fixed to the movable mold plate 9. The tip end 16 of the core pin 14 is extended to the inside of the boss cavity 7, and is inserted into the center thereof to form a hole 7b for attachment to the boss 7a. Further, a hollow dliJ portion] 9 is provided in the movable side template 9 so as to surround the base end 17 of the core pin 14, and this cavity 19 is used for cooling water channels etc. drilled in the movable side template 9. It communicates with the cooling medium passage 20. A cooling medium such as cooling water flows through the cooling medium passage 20 to cool the base end 7 of the core pin 4 in the cavity 9. Note that 21 is an O-ring.

次に、前述のように構成された射出成形用金型の作用に
ついて説明する。射出成形機によって加熱溶融樹脂を樹
脂注入口5から注入すると、溶融樹脂はキャビティ4お
よびホス用キャビティ7に充填される。溶融樹脂の充填
か終了したと同時に冷却媒体通路20に冷却水等の冷却
媒体を流通すると、空洞部1つにおいてコアピン14の
基端部]7か冷却される。一方、コアピン14の先端部
]6はボス用キャビティ7の内部に挿入されているため
、溶融樹脂によって直接加熱されるが、コアピンコ4か
ヒートパイプによって形成されているため、ホス7aの
熱を奪って効率的に冷却できる。
Next, the operation of the injection mold constructed as described above will be explained. When heated molten resin is injected from the resin injection port 5 by the injection molding machine, the molten resin is filled into the cavity 4 and the cavity 7 for the host. When the cooling medium such as cooling water is passed through the cooling medium passage 20 at the same time that the filling with the molten resin is completed, the base end 7 of the core pin 14 is cooled in one cavity. On the other hand, since the tip of the core pin 14] 6 is inserted into the boss cavity 7, it is directly heated by the molten resin, but since it is formed by the core pin 4 or a heat pipe, it takes away the heat from the boss 7a. can be cooled efficiently.

ずなイつち、コアピン14の先端部]6は吸熱部に、基
端部]7は放熱部に形成されているため、吸熱部か加熱
されると、ウィックに含まれている作動液か蒸発潜熱を
奪って気化するため吸熱部の圧力は放熱部より高くなる
。この圧力差によって蒸気は放熱部まで高速に移動し、
放熱部において蒸気は冷却されて凝縮し、気化時と等量
の凝縮潜熱を放出する。放熱部で凝縮した作動液はウィ
ソりの毛細管作用によって吸熱部に戻される。このよう
に蒸発=蒸気の移動−凝縮−還流のサイクルによって熱
輸送が行われ、さらに放熱部が冷却媒体によって強制的
に冷却されるためボス7aを急速に冷却することかでき
る。
As a matter of fact, the tip end] 6 of the core pin 14 is formed as a heat absorption part, and the base end] 7 is formed as a heat radiation part, so that when the heat absorption part is heated, the working fluid contained in the wick is formed. Because the latent heat of vaporization is taken away and vaporization takes place, the pressure in the heat absorption part becomes higher than that in the heat radiation part. This pressure difference causes the steam to move quickly to the heat dissipation area,
In the heat dissipation section, the steam is cooled and condensed, releasing the same amount of latent heat of condensation as during vaporization. The working fluid condensed in the heat sink is returned to the heat sink by capillary action. In this way, heat is transported through the cycle of evaporation = vapor movement - condensation - reflux, and furthermore, the heat radiating section is forcibly cooled by the cooling medium, so that the boss 7a can be rapidly cooled.

成形品4の主体4aおよびボス7aが冷却されて樹脂か
固化した後、可動金型3を固定金型2から離間する方向
に離型すると、成形品の主体4aは固定金型2から離型
するとともに、ボス7aはエジェクタ筒12の先端面で
突き出され、可動金型゛3から離型される。
After the main body 4a and boss 7a of the molded product 4 are cooled and the resin solidifies, when the movable mold 3 is released in the direction away from the fixed mold 2, the main body 4a of the molded product is released from the fixed mold 2. At the same time, the boss 7a is ejected from the distal end surface of the ejector cylinder 12 and released from the movable mold 3.

このようにボス7aをコアピン]4の先端部16で内側
から冷却することかできるため、短時間で冷却でき、射
出成形のサイクルタイムを短縮できるという効果かある
In this way, since the boss 7a can be cooled from the inside using the tip 16 of the core pin 4, cooling can be accomplished in a short time, which has the effect of shortening the injection molding cycle time.

なお、前記第1の実施例にお(jるコアピン]4は、ピ
ン本体]5の基端側からドリル加工を行った後、基端開
口を口板15 aによって1・1止したか、コアピン1
4の構造は前記実施例に限定されるものではなく、第4
図(a)〜(e)に示すように構成してもよい。
In addition, in the first embodiment, after drilling is performed from the proximal side of the pin body 5, the proximal opening is fixed by the opening plate 15a, or Core pin 1
The structure of No. 4 is not limited to the above embodiment, and the structure of No. 4 is not limited to the above embodiment.
It may be configured as shown in Figures (a) to (e).

すなわち、(a)は、ピン本体15の両端側からドリル
加工を行った後、両端開口を盲板15a、1、5 aに
よって封止したものである。(b)は、ピン本体]5の
先端側のみをドリル加工した後、先端開口を盲板15a
によって封止したものである。(c)は、第1の実施例
のピン本体]5を分割して形成l7、ろう付けによって
一体化した構造であり、特に長いピンに有効である。(
d)は、(a)のピン本体15を分割して形成し、ろう
付けによって一体化した構造であり、これも長いピンに
有効である。(e)゛は、(b)のピン本体15を分割
して形成し、ろう付けによって一体化した構造であり、
これも長いピンに有効である。
That is, in (a), after drilling is performed from both ends of the pin body 15, the openings at both ends are sealed with blind plates 15a, 1, 5a. In (b), after drilling only the tip side of the pin body] 5, the tip opening is opened in the blind plate 15a.
It is sealed by. (c) is a structure in which the pin body [5] of the first embodiment is divided, formed 17, and integrated by brazing, and is particularly effective for long pins. (
d) is a structure in which the pin main body 15 of (a) is formed by dividing and integrated by brazing, and this is also effective for long pins. (e) is a structure in which the pin body 15 of (b) is formed by dividing and integrated by brazing,
This is also effective for long pins.

なお、これらピン15にはウィックおよび作動液か封入
され、ヒートパイプに形成されていることは勿論である
It goes without saying that these pins 15 are filled with a wick and a working fluid, and are formed into a heat pipe.

第5図は第2の実施例を示すもので、ヒートパイプから
なるコアピン14および冷却媒体通路20を可動金型3
に設けたもので、他の部分は第]の実施例と同一である
。可動金型3は、キャビティ4およびボス用キャビティ
7を形成する第1の型部22と、この第1の型部22を
囲む第2の型部23とから構成されている。第1の型部
22にはコアピン14を貫通する貫通穴13か穿設され
、この一部にコアピン]4の基端部17を囲繞する空洞
部]9か設けられている。さらに、この空洞部]9は直
線的に穿設した第1の冷却媒体通路24に連通し、この
第1の冷却媒体通路24の両端部は第2の型部23にL
字状に穿設した第2の冷却媒体通路25に連通している
FIG. 5 shows a second embodiment, in which a core pin 14 consisting of a heat pipe and a cooling medium passage 20 are connected to a movable mold 3.
The other parts are the same as those in the second embodiment. The movable mold 3 includes a first mold part 22 that forms the cavity 4 and the boss cavity 7, and a second mold part 23 that surrounds the first mold part 22. A through hole 13 passing through the core pin 14 is bored in the first mold part 22, and a hollow part 9 surrounding the base end 17 of the core pin 4 is provided in a part of the through hole 13. Furthermore, this cavity ] 9 communicates with a first cooling medium passage 24 formed linearly, and both ends of this first cooling medium passage 24 are connected to the second mold part 23 .
It communicates with a second cooling medium passage 25 formed in a letter shape.

第6図は第3の実施例を示すもので、筒状成形品を成形
する金型である。iiJ動金型金型3樹脂注入口5と連
通ずるランナー26と、このランナ26に連通するキャ
ビティ27が設けられている。
FIG. 6 shows a third embodiment, which is a mold for molding a cylindrical molded product. iiJ moving mold A sliding runner 26 communicating with the resin injection port 5 of the mold 3 and a cavity 27 communicating with the runner 26 are provided.

キャビティ27は、可動金型3に設けた円筒状穴こヒー
トパイプからなるコアピン]4の先端側の略]/2を同
心的に挿入することにより形成され、この開口端はスト
リッパプレート28に設けたブツシュ2つによって閉塞
されている。
The cavity 27 is formed by concentrically inserting a core pin [4] made of a heat pipe into a cylindrical hole provided in the movable mold 3, and this open end is provided in the stripper plate 28. It is blocked by two bushes.

この実施例によれば、キャビティ27に充填される溶融
樹脂をその内側に配置されたコアピン14の吸熱部で均
一にしがも迅速に冷却することができる。
According to this embodiment, the molten resin filled in the cavity 27 can be cooled uniformly and quickly by the heat absorbing portion of the core pin 14 disposed inside the cavity 27.

第7図および第8図は第4の実施例を示すもので、ピン
本体15の先端側のみをドリル加工によって中空とし、
この中空部にウィックおよび作動液を封入してヒートパ
イプを形成したコアピン】4を使用した実施例である。
7 and 8 show a fourth embodiment, in which only the tip side of the pin body 15 is made hollow by drilling,
This embodiment uses a core pin [4] in which a heat pipe is formed by sealing a wick and a working fluid in the hollow part.

このコアピン]4は先端部16が吸熱部に、中間部3o
が放熱部に形成され、この中間部には可動金型3に対し
て固定された冷却媒体通路2oを有する冷却ブロック3
1か嵌合されている。そして、エジェクタ筒12には冷
却媒体通路2oに連通する通孔32゜32か穿設され、
冷却媒体通路2oを流通する冷却媒体は通孔32,32
がらニジ↓クタ筒12の内部に流入し、コアピン14の
中間部3oの放熱部を冷却するようになっている。
This core pin] 4 has a tip portion 16 as a heat absorbing portion and an intermediate portion 3o.
is formed in the heat dissipation part, and a cooling block 3 having a cooling medium passage 2o fixed to the movable mold 3 is provided in the intermediate part.
1 is fitted. The ejector cylinder 12 is provided with a through hole 32°32 that communicates with the cooling medium passage 2o.
The cooling medium flowing through the cooling medium passage 2o is passed through the through holes 32, 32.
The waste flows into the interior of the cylinder 12 and cools the heat dissipation section of the intermediate portion 3o of the core pin 14.

なお、前記各実施例においては、冷却媒体として冷却水
を用いたが、オイルまたは冷却エアーで] 3 あってもよい。また、ボス部分を強制的に冷却すること
に限定されず、肉厚部を冷却する場合においても適用で
きる。
In each of the above embodiments, cooling water was used as the cooling medium, but oil or cooling air may also be used. Further, the present invention is not limited to forcibly cooling a boss portion, but can also be applied to cooling a thick wall portion.

[発明の効果] 以上説明したように、この発明によれば、コアピンのピ
ン本体を中空パイプによって形成し、このピン本体の内
部に毛細管作用をなすウィックと作動液を封入し、ピン
本体の先端部に吸熱部、基端部に放熱部を形成したヒー
トパイプによって形成したから、ヒートパイプの原理に
よってコアピンの吸熱部で吸熱して放熱部で放熱すると
ともに、この放熱部を冷却媒体によって冷却することに
より、コアピンの先端部でボス等の肉厚部を短時間に冷
却して固化させることができ、成形金型の冷却通路を簡
素化できるという効果がある。
[Effects of the Invention] As explained above, according to the present invention, the pin body of the core pin is formed by a hollow pipe, and a wick and a working fluid that act as a capillary tube are sealed inside the pin body, so that the tip of the pin body Since it is formed by a heat pipe with a heat absorbing part at the end and a heat dissipating part at the base end, according to the heat pipe principle, heat is absorbed by the heat absorbing part of the core pin, and heat is radiated by the heat dissipating part, and this heat dissipating part is cooled by the cooling medium. As a result, thick parts such as bosses can be cooled and solidified in a short time at the tip of the core pin, and the cooling passage of the molding die can be simplified.

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

第1図〜第3図はこの発明の第1の実施例を示すもので
、第1図はコアピンの縦断面図、第2図は成形用金型の
縦断正面図、第3図は第2図のA部を拡大した縦断正面
図、第4図(a)〜(e)]4 はコアピンの変形例を示す縦断面図、第5図はこの発明
の第2の実施例を示す成形用金型の縦断正面図、第6図
はこの発明の第3の実施例を示す成形用金型の縦断正面
図、第7図はこの発明の第4の実施例を示す成形用金型
の縦断正面図、第8図は第7図のB部を拡大した縦断正
面図である。 4・・キャビティ、14・・・コアピン、]5・・・ピ
ン本体、16・・・先端部(吸熱部)、17・・・基端
部(放熱部)。 出願人代理人 弁理士 鈴江武彦 ] (c) (d) (e) 第 図 第 図 第 図 第 図 第 図 第 図
1 to 3 show a first embodiment of the present invention. FIG. 1 is a vertical sectional view of a core pin, FIG. 2 is a vertical sectional front view of a molding die, and FIG. 3 is a vertical sectional view of a core pin. 4(a) to (e)] 4 is a vertical sectional view showing a modified example of the core pin, and FIG. 5 is a longitudinal sectional view showing a second embodiment of the present invention. FIG. 6 is a longitudinal sectional front view of a molding die showing a third embodiment of the present invention, and FIG. 7 is a longitudinal sectional front view of a molding die showing a fourth embodiment of the invention. The front view, FIG. 8, is an enlarged vertical sectional front view of section B in FIG. 7. 4... Cavity, 14... Core pin, ]5... Pin body, 16... Tip part (heat absorption part), 17... Base end part (heat radiation part). Applicant's agent Patent attorney Takehiko Suzue] (c) (d) (e) Figure Figure Figure Figure Figure Figure Figure

Claims (1)

【特許請求の範囲】[Claims] 金型に形成され、加熱溶融樹脂が充填されるキャビティ
の内部に先端部を挿入してコアを形成する成形金型用コ
アピンにおいて、ピン本体を中空パイプによって形成し
、このピン本体の内部に毛細管作用をなすウィックと作
動液を封入し、前記先端部に吸熱部、基端部に放熱部を
形成したヒートパイプからなる成形金型用コアピン。
In core pins for molding molds, the tip of which is inserted into a cavity formed in a mold and filled with heated molten resin to form a core, the pin body is formed by a hollow pipe, and a capillary tube is inserted inside the pin body. A core pin for a molding die consisting of a heat pipe that encloses a wick and a working fluid, and has a heat absorbing part at the tip end and a heat radiating part at the base end.
JP2201134A 1990-07-31 1990-07-31 Injection mold Expired - Lifetime JP2716250B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2201134A JP2716250B2 (en) 1990-07-31 1990-07-31 Injection mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2201134A JP2716250B2 (en) 1990-07-31 1990-07-31 Injection mold

Publications (2)

Publication Number Publication Date
JPH0486235A true JPH0486235A (en) 1992-03-18
JP2716250B2 JP2716250B2 (en) 1998-02-18

Family

ID=16435970

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2201134A Expired - Lifetime JP2716250B2 (en) 1990-07-31 1990-07-31 Injection mold

Country Status (1)

Country Link
JP (1) JP2716250B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007112040A (en) * 2005-10-21 2007-05-10 Fujifilm Corp Mold and molding method
CN113985936A (en) * 2021-09-28 2022-01-28 宁波合力科技股份有限公司 Temperature control thimble for casting and temperature control method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54132848A (en) * 1978-04-06 1979-10-16 Suzuki Metal Industry Co Ltd Cooling device of plastic molding metal mold by heat pipe with water current altering plate
JPS57189814U (en) * 1981-05-27 1982-12-02
JPS6112714U (en) * 1984-06-28 1986-01-25 本田技研工業株式会社 Cast-out pin for preventing shrinkage of molded products
JPS6126969U (en) * 1984-07-24 1986-02-18 三菱鉛筆株式会社 Heat pipe for mold cooling

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54132848A (en) * 1978-04-06 1979-10-16 Suzuki Metal Industry Co Ltd Cooling device of plastic molding metal mold by heat pipe with water current altering plate
JPS57189814U (en) * 1981-05-27 1982-12-02
JPS6112714U (en) * 1984-06-28 1986-01-25 本田技研工業株式会社 Cast-out pin for preventing shrinkage of molded products
JPS6126969U (en) * 1984-07-24 1986-02-18 三菱鉛筆株式会社 Heat pipe for mold cooling

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007112040A (en) * 2005-10-21 2007-05-10 Fujifilm Corp Mold and molding method
CN113985936A (en) * 2021-09-28 2022-01-28 宁波合力科技股份有限公司 Temperature control thimble for casting and temperature control method thereof
CN113985936B (en) * 2021-09-28 2023-09-22 宁波合力科技股份有限公司 Casting control Wen Dingzhen and temperature control method thereof

Also Published As

Publication number Publication date
JP2716250B2 (en) 1998-02-18

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