JP3103393B2 - Injection mold heating device and injection mold heating method - Google Patents
Injection mold heating device and injection mold heating methodInfo
- Publication number
- JP3103393B2 JP3103393B2 JP16889191A JP16889191A JP3103393B2 JP 3103393 B2 JP3103393 B2 JP 3103393B2 JP 16889191 A JP16889191 A JP 16889191A JP 16889191 A JP16889191 A JP 16889191A JP 3103393 B2 JP3103393 B2 JP 3103393B2
- Authority
- JP
- Japan
- Prior art keywords
- heating
- temperature
- injection
- stage
- injection 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.)
- Expired - Fee Related
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、熱可塑性樹脂を用いて
高精度のプラスチック成形品、例えばレンズ等の光学部
品を射出成形する射出成形金型の加熱装置及び射出成形
金型の加熱昇温方法に関し、特に成形サイクルの短縮を
可能としたものに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating apparatus for an injection molding die for injection molding a high-precision plastic molded product, for example, an optical part such as a lens, using a thermoplastic resin, and a heating temperature of the injection molding die. The present invention relates to a method, particularly to a method capable of shortening a molding cycle.
【０００２】[0002]
【従来の技術】従来より高精度な光学プラスチック部品
を成形する技術が種々提案されており、このような技術
を開示するものとして例えば特開昭６４−３６４２１号
公報、特開平２−３８０１２号公報、特開昭１−１３９
２３１号公報などがある。これらの技術は、いずれも溶
融樹脂をガラス転移点（例えばポリカーボネートのガラ
ス転移点は約１４０℃）以上の温度に加熱昇温させた射
出成形金型のキャビティ内に溶融樹脂を射出充填し、そ
の後射出成形金型をガラス転移点以下の温度、具体的に
は熱変形温度（例えばポリカーボネートで１３０℃）以
下まで徐冷して成形品を取り出すというものである。2. Description of the Related Art There have been proposed various techniques for molding optical plastic parts with high precision. Japanese Patent Laid-Open Publication Nos. 64-36421 and 2-38012 disclose such techniques. JP-A-1-139
No. 231 and the like. In each of these techniques, the molten resin is injected and filled into the cavity of an injection molding mold in which the molten resin is heated to a temperature equal to or higher than the glass transition point (for example, the glass transition point of polycarbonate is about 140 ° C.) or higher. The injection molding die is gradually cooled to a temperature below the glass transition point, specifically, a heat deformation temperature (for example, 130 ° C. for polycarbonate), and the molded product is taken out.
【０００３】射出時に成形金型の温度を高くするのは、
樹脂の金型内での流動性を図れること、及び成形品であ
るプラスチックレンズ表面と内部との温度差を小さくし
て不均一な冷却を防ぎ、ヒケのない成形を可能とするこ
とである。このような成形金型の加熱のために従来用い
られている金型を加熱する方法としては、マッフル炉等
を用いて熱風を吹き付ける、高周波誘導により加熱す
る、温調機により加熱する、ヒーターにより加熱する等
々がある。The reason for raising the temperature of a molding die during injection is as follows.
The purpose is to make the resin flowable in the mold and to reduce the temperature difference between the surface and the inside of the molded plastic lens to prevent uneven cooling and to enable molding without sink marks. As a method of heating a mold conventionally used for heating such a mold, a hot air is blown using a muffle furnace or the like, heated by high frequency induction, heated by a temperature controller, heated by a heater. There is heating and so on.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら上記従来
の成形金型の加熱方法は、次の射出成形を行なうために
は成形金型をガラス転移点以上の温度まで再度昇温させ
る必要があるため、どうしても成形サイクルが長くな
り、このため生産性が余り高くないという問題が生じ、
また上述した従来の型加熱方式は、熱風の吹き付けによ
る場合は昇温に時間が掛かり過ぎ、高周波誘導加熱及び
温調機やヒーターによる加熱の場合にはが構造が複雑化
しまた熱媒体からの距離によって温度分布が生じやすい
という問題があり、そのために複数個の金型を順次使い
回すという方法が取られていた。However, in the above-mentioned conventional method of heating a molding die, it is necessary to raise the temperature of the molding die to a temperature higher than the glass transition point again in order to perform the next injection molding. Inevitably, the molding cycle becomes longer, which causes a problem that productivity is not so high.
Further, in the above-mentioned conventional mold heating method, when the hot air is blown, it takes too much time to raise the temperature. Therefore, there is a problem that a temperature distribution is easily generated, and a method of sequentially using a plurality of dies has been adopted for that purpose.
【０００５】そこで、複数段の加熱ステージを設けるこ
とにより迅速且つ均一な金型昇温を行なえる方法が提案
されている。しかしながらこの方法は、複数段の加熱ス
テージを作製するための材料費、加工費、ヒーター代、
制御装置費用等、及び電気代などが掛かるという問題を
有している。Therefore, a method has been proposed in which a plurality of heating stages are provided so that the temperature of the mold can be raised quickly and uniformly. However, this method requires a material cost, a processing cost, a heater cost, and a
There is a problem that a control device cost and an electricity bill are required.
【０００６】本発明はこのような従来の問題点を解決
し、より安価で迅速且つ均一な金型加熱昇温が行える装
置及びその方法を提案しようとするものである。An object of the present invention is to solve such a conventional problem, and to propose an apparatus and a method thereof capable of heating the mold at a lower temperature more quickly and more uniformly.
【０００７】[0007]
【課題を解決するための手段】本発明は上記目的を達成
するために、溶融樹脂を射出・充填するためのキャビテ
ィを形成する複数の射出成形金型と、該射出成形金型を
加熱する加熱ステーション、上記キャビティ内に溶融樹
脂を射出・充填する射出ステーション、溶融樹脂を射出
・充填された射出成形金型を徐冷する徐冷ステーショ
ン、冷却された射出成形金型から成形品を取り出す成形
品取り出しステーション及び上記各ステーションをつな
ぐ搬送路からなる射出成形金型の加熱装置において、上
記加熱ステーションは、少なくとも一段の加熱ステージ
と一段の均熱ステージを備える構成としたものである。In order to achieve the above object, the present invention provides a plurality of injection molding dies for forming a cavity for injecting and filling a molten resin, and a heating apparatus for heating the injection molding dies. Station, an injection station for injecting and filling the molten resin into the cavity, a slow cooling station for gradually cooling the injection mold filled with the molten resin, and a molded product for removing the molded product from the cooled injection mold In the heating apparatus for an injection molding die including a take-out station and a transport path connecting the above-described stations, the heating station is configured to include at least one heating stage and one heating stage.
【０００８】本発明に係る射出成形金型の加熱装置は、
上記加熱手段の加熱ステージを複数段備え、加熱ステー
ジの間に均熱ステージを備える構成とすることができ
る。[0008] A heating apparatus for an injection mold according to the present invention comprises:
A configuration may be adopted in which a plurality of heating stages of the heating means are provided, and a soaking stage is provided between the heating stages.
【０００９】本発明に係る射出成形金型の加熱装置は、
上記加熱手段の均熱ステージでの均熱手段を空気層とし
て構成することができる。[0009] The heating apparatus for an injection mold according to the present invention comprises:
The soaking means in the soaking stage of the heating means can be constituted as an air layer.
【００１０】本発明に係る射出成形金型の加熱装置は、
上記加熱手段の均熱ステージでの均熱手段を断熱板とし
て構成することができる。[0010] The heating apparatus for an injection mold according to the present invention comprises:
The soaking means in the soaking stage of the heating means can be constituted as a heat insulating plate.
【００１１】本発明に係る射出成形金型の加熱昇温方法
は上記いずれかの射出成形金型の加熱装置を用いるもの
であって、上記加熱ステージの設定温度を溶融樹脂の射
出時における金型温度よりも高温に設定し、該加熱ステ
ージで与えられた熱エネルギーを次の均熱ステージで金
型内部まで拡散させるようにしたものである。The method of heating and raising the temperature of the injection mold according to the present invention uses any one of the above-described heating devices for the injection mold, and sets the temperature of the heating stage at the time of injection of the molten resin. The temperature is set higher than the temperature, and the heat energy given by the heating stage is diffused into the mold in the next soaking stage.
【００１２】本発明に係る射出成形金型の加熱昇温方法
は、上記複数段の加熱ステージのうち第１加熱ステージ
の設定温度を射出時の金型温度よりも高温に設定し、第
２加熱ステージ以降の設定温度を射出時の金型温度と等
しくし、上記第１加熱ステージで与えられた熱エネルギ
ーを次の均熱ステージで金型内部に拡散させ、第２加熱
ステージ以降では金型温度を均一に安定化させるように
したものである。In the method for heating and raising the temperature of an injection mold according to the present invention, the temperature of the first heating stage among the plurality of heating stages is set to be higher than the temperature of the mold at the time of injection, and the second heating is performed. The set temperature after the stage is made equal to the mold temperature at the time of injection, the heat energy given in the first heating stage is diffused into the mold in the next soaking stage, and the mold temperature after the second heating stage. Is uniformly stabilized.
【００１３】[0013]
【実施例】本発明の実施例を図面を参照して説明する。
図１は本発明に係る射出成形金型の加熱装置の全体配置
図である。図に示すように、本実施例の射出成形金型の
加熱装置は、複数の射出成形金型１、射出成形金型１を
加熱する加熱ステーション２、射出成形金型１内のキャ
ビティに溶融樹脂を射出・充填する射出・充填ステーシ
ョン３、溶融樹脂を射出・充填された複数の射出成形金
型１を徐冷する徐冷ステーション４、徐冷を終えた射出
成形金型１から成形品を取り出す成形品取り出しステー
ション５及び各ステーションをつなぐ搬送路６から構成
されている。An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an overall layout view of a heating device for an injection mold according to the present invention. As shown in the drawing, a heating device for an injection mold according to the present embodiment includes a plurality of injection molds 1, a heating station 2 for heating the injection mold 1, a molten resin in a cavity in the injection mold 1. And filling station 3 for injecting and filling the molten resin, a slow cooling station 4 for gradually cooling the plurality of injection molding dies 1 into which the molten resin has been injected and filled, and taking out molded products from the injection molding dies 1 after the slow cooling. It comprises a molded article take-out station 5 and a transport path 6 connecting each station.
【００１４】図２は大気中放置の場合の加熱ステーショ
ンの構成を概念的に示す側面図である。加熱ステーショ
ン２は２段の加熱ステージ７、８と１段の均熱ステージ
９とから構成されている。１段目の加熱ステージ７の設
定温度は射出・充填時の射出成形金型１の温度よりも高
温にし、均熱ステージ９の次に来る２段目の加熱ステー
ジ８の設定温度は射出・充填時の射出成形金型１の温度
と同一に設定してある。FIG. 2 is a side view conceptually showing the structure of the heating station when left in the atmosphere. The heating station 2 is composed of two heating stages 7 and 8 and one heating stage 9. The set temperature of the first heating stage 7 is higher than the temperature of the injection mold 1 at the time of injection and filling, and the set temperature of the second heating stage 8 following the soaking stage 9 is injection and filling. The temperature is set to be the same as the temperature of the injection mold 1 at the time.
【００１５】図３は加熱ステージ７、８を示す部分断面
側面図である。この加熱ステージ７、８は一対のＬ字型
のヒーターブロック１０ａ、１０ｂを互いに逆向きに組
み合わせたものであり、各ヒーターブロック１０ａ、１
０ｂの材料は熱伝導率のよい銅あるいはアルミニウムで
ある。一対の型板１ａ、１ｂからなり、図示せぬが内部
に溶融樹脂を射出・充填するキャビティを形成する射出
成形金型１は、この両ヒーターブロック１０ａ、１０ｂ
の間に挟まれて保持される。FIG. 3 is a partial sectional side view showing the heating stages 7 and 8. The heating stages 7 and 8 are obtained by combining a pair of L-shaped heater blocks 10a and 10b in opposite directions.
The material of Ob is copper or aluminum having good thermal conductivity. The injection molding die 1, which includes a pair of mold plates 1 a and 1 b and forms a cavity (not shown) for injecting and filling a molten resin therein, includes the heater blocks 10 a and 10 b.
It is sandwiched and held between.
【００１６】ヒーターブロック１０ａ、１０ｂは夫々発
熱部材である複数の棒状ヒーター１１及び熱電対１２が
埋め込まれている。各棒状ヒーター１１は熱電対１２に
より温度管理を行ない、図示せぬコントローラーにより
射出成形金型１を均一に加熱昇温させるためほぼ等しい
発熱量となるように制御される。この温度制御にあたっ
ては、例えば合計２８本の棒状ヒーター１１を各７本ず
つの４チャンネルにて制御するといった方式を採用でき
る。In the heater blocks 10a and 10b, a plurality of rod-shaped heaters 11 and thermocouples 12 as heating members are embedded, respectively. The temperature of each rod-shaped heater 11 is controlled by a thermocouple 12, and is controlled by a controller (not shown) so that the heat generated by the injection molding die 1 is substantially equal in order to uniformly heat and raise the temperature. For this temperature control, for example, a system in which a total of 28 bar-shaped heaters 11 are controlled by four channels of seven each can be adopted.
【００１７】また図中１３は締め付け手段で、下側のヒ
ーターブロック１０ｂと同じく基板１４上に立設固定し
たスタンド１５の上端部に締め付け用のテンションレバ
ー１６を取付け、テンションレバー１６にＬ字型のヒー
ターブロック押さえ１７を連結して構成したクランプ状
のものである。ヒーターブロック押さえ１７は上側のヒ
ーターブロック１０ａにボルト１８、１８で連結固定し
てある。この締め付け手段１３は、射出成形金型１とヒ
ーターブロック１０ａ、１０ｂの密着度により加熱昇温
時間が著しく異なる点に着目して設けたもので、この締
め付け手段１３により強力な締め付け力を発生させつつ
射出成形金型１を加熱すると加熱昇温時間を短縮するこ
とができる。なお図中１９は断熱板で、熱的問題を考慮
して所要各部に配してある。また図中２０は押さえ付け
プレートである。In the figure, reference numeral 13 denotes a fastening means. A fastening tension lever 16 is attached to the upper end of a stand 15 which is erected and fixed on the substrate 14, similarly to the lower heater block 10b. Is a clamp-shaped member formed by connecting the heater block holders 17 of FIG. The heater block holder 17 is connected and fixed to the upper heater block 10a by bolts 18,18. The tightening means 13 is provided by paying attention to the fact that the heating time rises significantly depending on the degree of adhesion between the injection mold 1 and the heater blocks 10a and 10b. The tightening means 13 generates a strong tightening force. When the injection molding die 1 is heated while heating, the heating time can be reduced. In the drawing, reference numeral 19 denotes a heat insulating plate, which is arranged at required parts in consideration of thermal problems. In the figure, reference numeral 20 denotes a pressing plate.
【００１８】図４は均熱ステージ９を概念的に示したも
ので、均熱手段として断熱板２２を採用し、４枚の断熱
板２２で射出成形金型１を４方向から油圧あるいは空気
圧で挟み込んで（挟み込み方向は図中矢印で示す。）１
段目の加熱ステージ７で与えられた熱エネルギーが空気
中に放出されるのを防ぎ、金型温度勾配をなくすように
してある。なお図示の例の均熱ステージ９は、段熱板２
２及び段熱板２２を射出成形金型１に密着させるための
図示せぬ油圧あるいは空気圧装置からなるが、大気中に
放置する方法も採用できる。この場合、前段で与えられ
た熱エネルギーの一部は空気中に放出されるものの、そ
の分を見込んで１段目の加熱ステージ７での設定温度を
決定すれば十分に射出成形金型１の温度勾配は解消さ
れ、目標の射出時金型温度に到達でき、低コスト化も図
れる。FIG. 4 conceptually shows the heat equalizing stage 9, in which a heat insulating plate 22 is employed as a heat equalizing means, and the injection molding die 1 is hydraulically or pneumatically driven by the four heat insulating plates 22 from four directions. (Pinch direction is indicated by an arrow in the figure) 1
The heat energy given by the second heating stage 7 is prevented from being released into the air, and the mold temperature gradient is eliminated. Note that the soaking stage 9 in the illustrated example is a
Although it comprises a hydraulic or pneumatic device (not shown) for bringing the 2 and the step heating plate 22 into close contact with the injection molding die 1, a method of leaving it in the atmosphere can also be adopted. In this case, although a part of the heat energy given in the previous stage is released into the air, if the temperature set in the first heating stage 7 is determined in consideration of the amount, the temperature of the injection mold 1 can be sufficiently increased. The temperature gradient is eliminated, the target injection mold temperature can be reached, and the cost can be reduced.
【００１９】次に本実施例の動作を説明する。まず１段
目の加熱ステージ７において、テンションレバー１６に
よるテンションを解除しかつ弛め方向へ回転させてヒー
ターブロック１０ａ、１０ｂ間に隙間を明けて射出成形
金型１を嵌め込みやすくしておく。ヒーターブロック押
さえ１７とヒーターブロック１０ａとがボルト１８で連
結されているため、テンションレバー１６の操作により
ヒーターブロック１０ａが持ち上がり、両ヒーターブロ
ック１０ａ、１０ｂ間に隙間ができる。そこで、成形品
取り出しステーション５において成形品を取り出された
射出成形金型１を、搬送路６上を加熱ステーション２へ
と搬送し、上述のように形成した１段目の加熱ステージ
７のヒーターブロック１０ａ、１０ｂ間の隙間へと嵌め
込む。Next, the operation of this embodiment will be described. First, in the first heating stage 7, the tension by the tension lever 16 is released and rotated in the loosening direction to make a gap between the heater blocks 10a and 10b so that the injection molding die 1 is easily fitted. Since the heater block holder 17 and the heater block 10a are connected by bolts 18, the operation of the tension lever 16 raises the heater block 10a, and a gap is formed between the heater blocks 10a and 10b. Therefore, the injection mold 1 from which the molded product has been taken out at the molded product take-out station 5 is conveyed along the conveyance path 6 to the heating station 2 and the heater block of the first heating stage 7 formed as described above. Fit into the gap between 10a and 10b.
【００２０】次にヒーターブロック１０ａ、１０ｂ間に
射出成形金型１を嵌め込んだ状態で再びテンションレバ
ー１６を操作し、両ヒーターブロック１０ａ、１０ｂ間
を強力に締め付ける。この状態で各棒状ヒーター１１を
熱電対１２により温度管理しつつ射出成形金型１ができ
るだけ均一に昇温するように加熱する。Next, the tension lever 16 is again operated while the injection mold 1 is fitted between the heater blocks 10a and 10b, and the space between the heater blocks 10a and 10b is strongly tightened. In this state, the temperature of each rod-shaped heater 11 is controlled by the thermocouple 12, and the injection molding die 1 is heated so as to increase the temperature as uniformly as possible.
【００２１】１段目の加熱ステージ７において射出成形
金型１を目的の温度、即ち射出・充填時の射出成形金型
１の温度よりも高い温度まで加熱したところで、再びテ
ンションレバー１６を操作して両ヒーターブロック１０
ａ、１０ｂ間に隙間を明け、射出成形金型１を均熱ステ
ージ９へ送り出す。均熱ステージ９では断熱板２２で射
出成形金型１を４方向から挟み込み、加熱ステージ７で
与えられた熱エネルギーが空気中に放出されるのを防ぎ
つつ金型温度勾配をなくす。そして射出成形金型１の温
度勾配が解消され、目標の射出時金型温度に到達したと
ころで射出成形金型１を２段目の加熱ステージ８に送
り、１段目の加熱ステージ７と同様にして加熱昇温を行
ない、射出成形金型１を射出・充填時の設定温度まで加
熱昇温させる。加熱昇温が終了した射出成形金型１は、
温度勾配が完全に解消され、設定された金型温度に到達
する。At the first heating stage 7, when the injection mold 1 is heated to a target temperature, that is, a temperature higher than the temperature of the injection mold 1 at the time of injection and filling, the tension lever 16 is operated again. And both heater blocks 10
A gap is made between a and 10b, and the injection molding die 1 is sent out to the soaking stage 9. In the soaking stage 9, the injection mold 1 is sandwiched by the heat insulating plate 22 from four directions, and the heat energy given by the heating stage 7 is prevented from being released into the air, and the mold temperature gradient is eliminated. When the temperature gradient of the injection mold 1 is eliminated and the target injection mold temperature is reached, the injection mold 1 is sent to the second heating stage 8 in the same manner as the first heating stage 7. To raise the temperature of the injection mold 1 to the set temperature at the time of injection and filling. The injection mold 1 for which heating and heating have been completed is
The temperature gradient is completely eliminated and the set mold temperature is reached.
【００２２】図５は上述した加熱ステーション２におけ
る射出成形金型１の加熱、均熱、再加熱による温度変化
を示すものである。図示のように、１段目の加熱ステー
ジ７を終了した時点では射出成形金型１の外側部温度
（図中線ａで示す。）、中間部温度（図中線ｂで示
す。）、金型中心部温度（図中線ｃで示す。）の間には
夫々温度差があるものの、均熱ステージ９において徐々
に均熱化されて温度勾配が少なくなり、２段目の加熱ス
テージ８を終了する時点においては温度勾配が完全に解
消され、且つ射出・充填時の金型温度に到達しているこ
とが分かる。FIG. 5 shows a change in temperature due to heating, soaking, and reheating of the injection mold 1 in the heating station 2 described above. As shown, when the first heating stage 7 is completed, the temperature of the outside part of the injection mold 1 (indicated by a line a in the figure), the temperature of the intermediate part (indicated by a line b in the figure), and gold Although there is a temperature difference between the mold center temperatures (indicated by the line c in the figure), the temperature is gradually soaked in the soaking stage 9 to reduce the temperature gradient, and the second heating stage 8 At the end point, it can be seen that the temperature gradient has been completely eliminated and the mold temperature at the time of injection and filling has been reached.
【００２３】加熱ステーション２における加熱、均熱処
理を終えた射出成形金型１を搬送路６上を射出・充填ス
テーション３へと搬送し、射出・充填ステーション３に
おいてキャビティ内へ溶融樹脂を射出・充填し、再び搬
送路６によって徐冷ステーション４へ搬送して徐冷し、
その後成形品取り出しステーション５へ送って成形品を
取り出す。成形品を取り出された射出成形金型１は、搬
送路６によって再び加熱ステーション２へと搬送され、
次段の射出成形サイクルに入る。The injection molding die 1 which has been heated and soaked in the heating station 2 is conveyed on the conveying path 6 to the injection / filling station 3 where the molten resin is injected / filled into the cavity at the injection / filling station 3. Then, it is again conveyed to the slow cooling station 4 by the conveying path 6 and gradually cooled,
Thereafter, the product is sent to the molded product removal station 5 to remove the molded product. The injection mold 1 from which the molded product has been taken out is transported again to the heating station 2 by the transport path 6, and
Enter the next injection molding cycle.
【００２４】[0024]
【発明の効果】請求項１に係る射出成形金型の加熱装置
は以上説明してきたように、射出成形金型を加熱する加
熱ステーションが少なくとも一段の加熱ステージと一段
の均熱ステージを備える構成としたので、均一かつ速や
かな射出成形金型の加熱昇温ができ、装置を構成するた
めの費用や装置を運転するための費用が安価ですむよう
になるという効果がある。As described above, the heating device for heating the injection mold has at least one heating stage and one heat equalizing stage. As a result, the temperature of the injection mold can be increased uniformly and quickly, and the cost for configuring the apparatus and the cost for operating the apparatus can be reduced.
【００２５】請求項２に係る射出成形金型の加熱装置
は、上記加熱手段の加熱ステージを複数段備え、その間
に均熱ステージを配するようにしたので、均熱ステージ
後に射出・充填時の金型温度と同じ設定温度の加熱ステ
ージを設けることができ、金型温度を更に安定化できる
ようになるという効果がある。The heating device for the injection mold according to the second aspect is provided with a plurality of heating stages for the heating means, and the soaking stage is arranged between the heating stages. A heating stage having the same set temperature as the mold temperature can be provided, so that the mold temperature can be further stabilized.
【００２６】請求項３に係る射出成形金型の加熱装置
は、上記加熱手段の均熱ステージでの均熱手段を空気層
として構成したので、従来の多段加熱ブロックの場合に
比べて、制作費及び電気代を２／３程度に大幅に減らせ
るものとなり、使用中の補修費用も低減できるようにな
るという効果がある。According to the third aspect of the present invention, the heating device for the injection mold has a soaking means in the soaking stage of the heating means as an air layer, so that the production cost is higher than that of the conventional multi-stage heating block. In addition, the electricity cost can be greatly reduced to about 2/3, and the repair cost during use can be reduced.
【００２７】請求項４に係る射出成形金型の加熱装置
は、上記加熱手段の均熱ステージでの均熱手段を断熱板
として構成したので、請求項３の場合ほどは制作費は低
減できないが、１段目の加熱ステージの設定温度を請求
項３ほどは高くする必要がなくなり、これによって電気
代の低減が図れ、制作費も従来の多段加熱ブロックより
も安価にできるようになるという効果がある。In the heating device for the injection mold according to the fourth aspect, the soaking plate in the soaking stage of the heating unit is constituted as a heat insulating plate, so that the production cost cannot be reduced as in the case of the third embodiment. (1) It is no longer necessary to set the temperature of the first heating stage as high as in claim 3 , whereby the electricity cost can be reduced and the production cost can be made lower than that of the conventional multi-stage heating block. is there.
【００２８】請求項５に係る射出成形金型の加熱昇温方
法は、加熱ステージの設定温度を射出・充填時の金型温
度よりも高くしたことで、短時間で加熱昇温ができ、且
つ均熱ステージにより金型内の温度勾配を解消できるよ
うになるという効果がある。According to a fifth aspect of the present invention, in the method of heating and raising the temperature of the injection mold, the set temperature of the heating stage is set higher than the temperature of the mold at the time of injection and filling. There is an effect that the temperature gradient in the mold can be eliminated by the soaking stage.
【００２９】請求項６に係る射出成形金型の加熱昇温方
法は、複数の加熱ステージの間に均熱ステージを配し、
均熱ステージ後に射出・充填時の金型温度と同じ設定温
度の加熱ステージを設けたので、金型温度を更に安定化
できるようになるという効果がある。According to a sixth aspect of the present invention, there is provided a method for heating and raising the temperature of an injection mold, wherein a soaking stage is arranged between a plurality of heating stages.
Since the heating stage having the same set temperature as the mold temperature at the time of injection and filling is provided after the soaking stage, there is an effect that the mold temperature can be further stabilized.
【図１】図１は本発明に係る射出成形金型の加熱装置の
全体配置図である。FIG. 1 is an overall layout view of a heating device for an injection mold according to the present invention.
【図２】図２は加熱ステーションの構成を概念的に示す
側面図である。FIG. 2 is a side view conceptually showing a configuration of a heating station.
【図３】図３は加熱ステーション中の加熱ステージを示
す断面図である。FIG. 3 is a sectional view showing a heating stage in a heating station.
【図４】図４は加熱ステーション中の均熱ステージを概
念的に示す側面図である。FIG. 4 is a side view conceptually showing a soaking stage in a heating station.
【図５】図５は加熱ステーションにおける金型温度の変
化を示すグラフである。FIG. 5 is a graph showing a change in a mold temperature in a heating station.
１ 射出成形金型 ２ 加熱ステーション ３ 射出・充填ステーション ４ 徐冷ステーション ５ 成形品取り出しステーション ６ 搬送路 ７、８ 加熱ステージ ９ 均熱ステージ ２２ 断熱板 DESCRIPTION OF SYMBOLS 1 Injection molding die 2 Heating station 3 Injection / filling station 4 Slow cooling station 5 Mold taking-out station 6 Transport path 7, 8 Heating stage 9 Equalizing stage 22 Insulating plate
───────────────────────────────────────────────────── フロントページの続き (72)発明者 畠山 寿治 東京都大田区中馬込１丁目３番６号 株 式会社リコー内 (56)参考文献 特開 平４−164610（ＪＰ，Ａ) 特開 平２−165919（ＪＰ，Ａ) 特開 平２−158314（ＪＰ，Ａ) 実開 平２−22811（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B29C 45/26 - 45/44 B29C 45/73 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Suji Hatakeyama 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd. (56) References JP-A-4-164610 (JP, A) JP-A-Hei 2-165919 (JP, A) JP-A-2-158314 (JP, A) JP-A-2-22811 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) B29C 45/26 -45/44 B29C 45/73
Claims (6)
ティを形成する複数の射出成形金型と、該射出成形金型
を加熱する加熱ステーション、上記キャビティ内に溶融
樹脂を射出・充填する射出ステーション、溶融樹脂を射
出・充填された射出成形金型を徐冷する徐冷ステーショ
ン、冷却された射出成形金型から成形品を取り出す成形
品取り出しステーション及び上記各ステーションをつな
ぐ搬送路からなる射出成形金型の加熱装置において、上
記加熱ステーションは、少なくとも一段の加熱ステージ
と一段の均熱ステージを備えることを特徴とする射出成
形金型の加熱装置。1. A plurality of injection molds for forming a cavity for injecting and filling a molten resin, a heating station for heating the injection mold, and an injection station for injecting and filling a molten resin in the cavity. , A gradual cooling station for gradually cooling an injection mold filled with molten resin, a molded article removal station for removing molded articles from the cooled injection mold, and a transport path connecting the above stations. A heating device for an injection mold, wherein the heating station comprises at least one heating stage and one heating stage.
え、加熱ステージの間に均熱ステージを備えたことを特
徴とする請求項１の射出成形金型の加熱装置。2. The heating apparatus for an injection mold according to claim 1, wherein said heating means includes a plurality of heating stages, and a soaking stage between the heating stages.
段を空気層としたことを特徴とする請求項１または２の
射出成形金型の加熱装置。3. The heating apparatus for an injection mold according to claim 1, wherein the soaking means in the soaking stage of the heating means is an air layer.
段を断熱板としたことを特徴とする請求項１または２の
射出成形金型の加熱装置。4. The heating apparatus for an injection mold according to claim 1, wherein the heat equalizing means in the heat equalizing stage of the heating means is a heat insulating plate.
金型の加熱装置において、上記加熱ステージの設定温度
を溶融樹脂の射出時における金型温度よりも高温に設定
し、該加熱ステージで与えられた熱エネルギーを次の均
熱ステージで金型内部まで拡散させることにより金型を
均熱化させることを特徴とする射出成形金型の加熱昇温
方法。5. The heating apparatus for an injection mold according to claim 1, wherein a set temperature of the heating stage is set to be higher than a mold temperature at the time of injection of the molten resin. A method for heating and raising the temperature of an injection molding die, comprising: dispersing the applied heat energy to the inside of the die in a next soaking stage to equalize the temperature of the die.
金型の加熱装置において、上記複数段の加熱ステージの
うち第１加熱ステージの設定温度を射出時の金型温度よ
りも高温に設定し、第２加熱ステージ以降の設定温度を
射出時の金型温度と等しくし、上記第１加熱ステージで
与えられた熱エネルギーを次の均熱ステージで金型内部
に拡散させ、第２加熱ステージ以降では金型温度を均一
に安定化させることを特徴とする射出成形金型の加熱昇
温方法。6. The heating apparatus for an injection mold according to claim 2, wherein a set temperature of a first heating stage among the plurality of heating stages is set to be higher than a mold temperature at the time of injection. Then, the set temperature after the second heating stage is made equal to the mold temperature at the time of injection, and the thermal energy given in the first heating stage is diffused into the mold in the next soaking stage. Hereinafter, a method of heating and raising the temperature of an injection molding die, wherein the temperature of the die is uniformly stabilized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16889191A JP3103393B2 (en) | 1991-06-13 | 1991-06-13 | Injection mold heating device and injection mold heating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16889191A JP3103393B2 (en) | 1991-06-13 | 1991-06-13 | Injection mold heating device and injection mold heating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04366613A JPH04366613A (en) | 1992-12-18 |
| JP3103393B2 true JP3103393B2 (en) | 2000-10-30 |
Family
ID=15876488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16889191A Expired - Fee Related JP3103393B2 (en) | 1991-06-13 | 1991-06-13 | Injection mold heating device and injection mold heating method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3103393B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180000439A (en) * | 2016-06-23 | 2018-01-03 | 낙우산업(주) | Mold system for the nozzle fairing of aerospace |
-
1991
- 1991-06-13 JP JP16889191A patent/JP3103393B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180000439A (en) * | 2016-06-23 | 2018-01-03 | 낙우산업(주) | Mold system for the nozzle fairing of aerospace |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04366613A (en) | 1992-12-18 |
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