JPS62173218A - Mold temperature control method - Google Patents
Mold temperature control methodInfo
- Publication number
- JPS62173218A JPS62173218A JP1382286A JP1382286A JPS62173218A JP S62173218 A JPS62173218 A JP S62173218A JP 1382286 A JP1382286 A JP 1382286A JP 1382286 A JP1382286 A JP 1382286A JP S62173218 A JPS62173218 A JP S62173218A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- mold
- low
- control
- heat exchanger
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 17
- 239000012530 fluid Substances 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract 7
- 238000000465 moulding Methods 0.000 description 8
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical group OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010583 slow cooling Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 235000010290 biphenyl Nutrition 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- -1 diphenyl compound Chemical class 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/0288—Controlling heating or curing of polymers during moulding, e.g. by measuring temperatures or properties of the polymer and regulating the process
- B29C35/0294—Controlling heating or curing of polymers during moulding, e.g. by measuring temperatures or properties of the polymer and regulating the process using tempering units for temperature control of moulds or cores
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、金型を適切な成形温度に調節する方法に関す
るものであり、特に、金型の時間に対する温度変化を精
密に制御する金型温度調節方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method of adjusting a mold to an appropriate molding temperature, and particularly to a method of controlling a mold temperature to precisely control the temperature change over time of the mold. This relates to an adjustment method.
従来の金型温度調節方法は、たとえば特開昭５８− １
９３１１０号公報に記載されるように，設定温度に対し
て高温および低温の二系統の熱媒体を用い、それぞれの
流量などを調節しながら混合し、この混合熱媒体を金型
に流通することにより、金型を一定の温度に保つ方法が
知られている。A conventional mold temperature control method is disclosed in, for example, Japanese Patent Application Laid-open No. 1983-1.
As described in Publication No. 93110, by using two systems of heat medium, high temperature and low temperature relative to the set temperature, mixing them while adjusting the flow rate of each, and circulating this mixed heat medium through the mold. , a method of keeping the mold at a constant temperature is known.
この金型温度調節方法は成形品が比較的薄肉かつ要求精
度が甘い場合など、金型温度を一定にして成形する場合
に金型温度ばらつきが低減するということで効果がある
。This mold temperature adjustment method is effective in reducing mold temperature variations when molding is performed at a constant mold temperature, such as when the molded product is relatively thin and the required precision is low.
しかしながら、カメラレンズなどの精密光学部品を精度
良く得るためには、金型を一定温度に保つよりも、積極
的に所定の温度勾配をつけて制御することが必須である
。However, in order to obtain precision optical parts such as camera lenses with high precision, it is essential to actively control the mold by creating a predetermined temperature gradient, rather than keeping the mold at a constant temperature.
このとき、従来の高温および低温の熱媒体を混合する方
法では、流董，温度の他、粘性も制御しなければならず
、精密な温度制御は困難であった。At this time, in the conventional method of mixing high-temperature and low-temperature heat media, it is necessary to control not only flow rate and temperature but also viscosity, making precise temperature control difficult.
また、用いる熱媒体も同一種類としなければならず、高
温および低温の画然媒体に見合う適当な種類がなく、さ
らに、金型内を循環させろことによる熱媒体の劣化も大
きな問題点であった。In addition, the heat medium used had to be of the same type, and there was no suitable type suitable for the distinct high and low temperatures.Furthermore, deterioration of the heat medium due to circulation within the mold was a major problem. .
本発明は前述の欠点を除去するためになされたものであ
り、その目的は、金型温度を時間に対して所定の割合で
変化させるのに好適な金型温度調節方法を提供すること
にある。The present invention has been made to eliminate the above-mentioned drawbacks, and its purpose is to provide a mold temperature control method suitable for changing mold temperature at a predetermined rate over time. .
前記の目的を達成するために本発明は、熱交換器を介し
て金型に流す制御流体の温度を、前記熱交換器に流通さ
せる高温熱媒体と低温熱媒体を用いて、制御することに
より、三つの媒体を混合させることなく、また、別々の
媒体種類を用いて金型の時間に対する温度変化を精密制
御する点に特徴がある。In order to achieve the above object, the present invention controls the temperature of a control fluid flowing into a mold via a heat exchanger using a high temperature heat medium and a low temperature heat medium that flow through the heat exchanger. , is characterized by precisely controlling the temperature change over time of the mold by using different types of media without mixing the three media.
以下に、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図は本発明の一実施例の概略構成図である。FIG. 1 is a schematic diagram of an embodiment of the present invention.
図において、１は熱交換器、２は熱交換器１に流入し、
制御流体９の温度を上昇させる高温熱媒体を供給する高
温タンク、３は熱交換器１に流入し制御流体９の温度を
下降させる低温熱媒体を供給する低温タンク、４および
５は熱交換器１に流入する高温熱媒体と低温熱媒体を切
換える方向切換弁、６は熱交換器１に流入する高温熱媒
体あるいは低温熱媒体の流量を制御する流量制御弁、７
は成形機８からの信号−より方向切換弁４．５および流
量制御弁６を制御する制御装置、１０は制御流体９を金
型１２に圧送・循環させるポンプ、１１は高温熱媒体あ
るいは低温熱媒体を熱交換器１に圧送するポンプである
。In the figure, 1 is the heat exchanger, 2 is the flow into the heat exchanger 1,
3 is a high-temperature tank that supplies a high-temperature heat medium that increases the temperature of the control fluid 9; 3 is a low-temperature tank that supplies a low-temperature heat medium that flows into the heat exchanger 1 and lowers the temperature of the control fluid 9; 4 and 5 are heat exchangers 1 is a directional switching valve that switches the high temperature heat medium and low temperature heat medium flowing into the heat exchanger 1; 6 is a flow control valve that controls the flow rate of the high temperature heat medium or the low temperature heat medium flowing into the heat exchanger 1;
1 is a control device that controls the directional control valve 4.5 and the flow rate control valve 6 from a signal from the molding machine 8; 10 is a pump that pumps and circulates the control fluid 9 to the mold 12; 11 is a high-temperature heat medium or a low-temperature heat medium; This is a pump that pumps the medium to the heat exchanger 1.
つぎに作用を説明する。金型１２の温度は成形品の肉厚
および要求精度により、その最適な温度変化パターンが
有るが、いずれの場合も温度ばらつきは最小限におさえ
る必要がある。Next, the effect will be explained. There is an optimal temperature change pattern for the temperature of the mold 12 depending on the thickness of the molded product and the required precision, but in any case, it is necessary to suppress temperature variations to a minimum.
まず、熱交換器１に流入する制御流体９の温度は、一定
の設定温度に保たれている。一方、高温タンク２の高温
熱媒体の温度は、金型温度変化パターンの最高温度より
も５０℃程度高い一定の温度に設定しである。また、低
温タンク３の低温熱媒体の温度は金型温度変化パターン
の最低温度よりも５０℃程度低い一定の温度に設定しで
ある。First, the temperature of the control fluid 9 flowing into the heat exchanger 1 is maintained at a constant set temperature. On the other hand, the temperature of the high-temperature heat medium in the high-temperature tank 2 is set at a constant temperature that is approximately 50° C. higher than the maximum temperature of the mold temperature change pattern. Further, the temperature of the low-temperature heat medium in the low-temperature tank 3 is set to a constant temperature that is approximately 50° C. lower than the lowest temperature of the mold temperature change pattern.
そして、金型温度を降下するときは、方向切換弁４，５
を低温タフ１５に切換えることにより、金型１２に供給
される制御流体の温度を降下させる。When lowering the mold temperature, the directional control valves 4 and 5
By switching to the low temperature tough 15, the temperature of the control fluid supplied to the mold 12 is lowered.
この降下勾配の制御は、熱交換器１に流入する低温熱媒
体の流量を流量制御弁６で制御することによりなされる
。This descending gradient is controlled by controlling the flow rate of the low temperature heat medium flowing into the heat exchanger 1 using the flow rate control valve 6.
同様に、金型温度を昇温するときは、方向切換弁４，５
を高温夕／り２に切換えることにより、金型１２に供給
される制御流体の温度を上昇させる。Similarly, when increasing the mold temperature, directional control valves 4 and 5
By switching the temperature to the high temperature temperature 2, the temperature of the control fluid supplied to the mold 12 is increased.
その昇温勾配は流量制御弁６で熱交換器１に流入する高
温熱媒体の流量を制御することによりなされる。The temperature increase gradient is achieved by controlling the flow rate of the high temperature heat medium flowing into the heat exchanger 1 using the flow rate control valve 6.
たたし、熱交換器１に流入する制御流体９の設定温度、
高温夕／り２および低温タンク３の設定温度は、最適な
金型温度変化パターンにより、最も効率の良い温度に適
時設定する必要がある。However, the set temperature of the control fluid 9 flowing into the heat exchanger 1,
The set temperatures of the high-temperature tank 2 and the low-temperature tank 3 need to be set at the most efficient temperature in a timely manner based on the optimum mold temperature change pattern.
第２図は、レンズなどの精密光学部品に有効な成形方法
の一つである徐冷法の金型温度変化パターンと、このパ
ターンを実現するための方向切換弁４，５の開・閉およ
び流量制御弁６による熱媒体の流量変化をあられした図
である。Figure 2 shows the mold temperature change pattern of the slow cooling method, which is one of the effective molding methods for precision optical parts such as lenses, and the opening/closing and flow rate control of the directional control valves 4 and 5 to realize this pattern. 6 is a diagram showing the change in the flow rate of the heat medium due to the valve 6. FIG.
第２図において、α、ｂ、ｃ、ｄは各成形工程を示して
おり、αは予備加熱工程、ｂは成形機８から金型１２へ
樹脂が射出・充填される工程、Ｃは樹脂が徐冷される工
程、ｄは成形品の取り出しである。In Fig. 2, α, b, c, and d indicate each molding process, α is a preheating process, b is a process in which resin is injected and filled from the molding machine 8 into the mold 12, and C is a process in which resin is injected and filled into the mold 12. In the step of slow cooling, d is the removal of the molded product.
また、Ａは高温タンク２の設定温度、Ｂは熱交換器１に
流入する制御流体９の設定温度、Ｃは低温タンク３の設
定温度である。Further, A is the set temperature of the high temperature tank 2, B is the set temperature of the control fluid 9 flowing into the heat exchanger 1, and C is the set temperature of the low temperature tank 3.
まず、予備加熱工程αにおいては、方向切換弁４．５は
高温タンク２側が開、低温タンク３側が閉となっている
。このときの高温熱媒体流量は最初は流量制御弁６が全
開して金型１２を急加熱しており、途中から金型１２の
過熱を防止するため、流量制御弁６をしぼり流量を少な
くしている。First, in the preheating step α, the directional switching valve 4.5 is opened on the high temperature tank 2 side and closed on the low temperature tank 3 side. At this time, the flow control valve 6 is fully opened to rapidly heat the mold 12, and in order to prevent the mold 12 from overheating, the flow rate control valve 6 is throttled down to reduce the flow rate. ing.
つぎの射出・充填工程すでは金型温度を一定に保ち、今
回は制御流体の設定温度をこの金型温度と同じに設定し
たことから、方向切換弁４．５は高温タンク２および低
温タンク３はともに閉となっている。In the next injection/filling process, the mold temperature is kept constant, and this time the set temperature of the control fluid is set to be the same as this mold temperature. Both are closed.
つぎの徐冷工程Ｃでは、方向切換弁４，５は低温タンク
５側で開、高温タンク２側で閉となっている。また、流
量制御弁６は徐々にその開度を太きくし、熱交換器１を
通過する制御流体９の温度を徐々に降下させている。In the next slow cooling step C, the directional control valves 4 and 5 are opened on the low temperature tank 5 side and closed on the high temperature tank 2 side. Further, the opening degree of the flow rate control valve 6 is gradually increased to gradually lower the temperature of the control fluid 9 passing through the heat exchanger 1.
なお、方向切換弁４，５の選択および弁の開・閉。In addition, the selection of the directional control valves 4 and 5 and the opening/closing of the valves.
流量制御弁６の開度の条件は、あらかじめ制御装置７に
設定されており、制御装置７は成形機８から伝達される
信号により作動を開始する。The conditions for the opening degree of the flow rate control valve 6 are set in advance in the control device 7, and the control device 7 starts its operation in response to a signal transmitted from the molding machine 8.
以上は、熱交換器１に流入する高温熱媒体および低温熱
媒体の流量を制御することにより、制御流体の時間に対
する温度変化を制御しているが、高温熱媒体および低温
熱媒体の温度を変化させたり、制御流体の流量を変える
などいくつかの方法がある。どのような方法にするかは
、実際の金型温度変化パターン、使用する制御流体、熱
媒体の種類等を考慮し、最小のコスト、成形サイクル短
縮などの見地から適宜決定する必要がある。In the above, the temperature change over time of the control fluid is controlled by controlling the flow rates of the high temperature heat medium and the low temperature heat medium flowing into the heat exchanger 1, but the temperature of the high temperature heat medium and the low temperature heat medium is changed. There are several ways to do this, such as changing the flow rate of the control fluid. The method to be used needs to be determined appropriately from the standpoint of minimizing cost, shortening the molding cycle, etc., taking into consideration the actual mold temperature change pattern, the control fluid to be used, the type of heat medium, etc.
なお、−例として、制御流体としては、水、高温熱媒体
としては、エチレングリコール、低温熱媒体としては、
ジフェニール化合物を用いるが、粘性および常圧で高温
になる熱媒体ならいづれを選定しても問題はない。For example, the control fluid is water, the high temperature heat medium is ethylene glycol, and the low temperature heat medium is:
Although a diphenyl compound is used, there is no problem in selecting any heat medium that is viscous and reaches a high temperature at normal pressure.
以上の説明から明らかなように、本発明によれば、熱交
換器に流入する制御流体を、この熱交換器を流通させる
高温熱媒体および低温熱媒体の流量、温度により昇温あ
るいは降温させるため、制御流体の時間に対する温度変
化を精密に制御することができ、したがって、制御流体
が循環する金型の時間に対する温度変化を精密制御する
ことが可能でおる。また、制御流体に高温熱媒体および
低温熱媒体を混合させるものでないので、それぞれ異な
る種類の熱媒体を用いることができるなどの効果が達成
される。As is clear from the above description, according to the present invention, the temperature of the control fluid flowing into the heat exchanger is raised or lowered depending on the flow rate and temperature of the high-temperature heat medium and the low-temperature heat medium flowing through the heat exchanger. , it is possible to precisely control the temperature change over time of the control fluid, and therefore it is possible to precisely control the temperature change over time of the mold in which the control fluid circulates. Furthermore, since the control fluid does not mix the high-temperature heat medium and the low-temperature heat medium, effects such as being able to use different types of heat medium can be achieved.
第１図は本発明の一笑施例を示す概略構成図、第２図は
実際の金型温度変化パターンとそのパターンを実現する
ための方向切換弁の開、閉および流量制御弁による流量
制御を示す図である。
１・・・・・・・・・・熱交換器
２・・・・・・・・・・・・高温タンクろ・・・・・・
・・・・・低温タンク
４．５・・・・・方向切換弁
６・・・・・・・・・・・・流量制御弁７・・・・・・
・・・・・制御装置
９・・・・・・・・・・・・制御流体
１２・・・・・−・・金型Fig. 1 is a schematic configuration diagram showing a simple embodiment of the present invention, and Fig. 2 shows an actual mold temperature change pattern and the opening/closing of the directional control valve and flow control by the flow control valve to realize the pattern. FIG. 1...Heat exchanger 2...High temperature tank...
......Cryogenic tank 4.5...Directional switching valve 6...Flow rate control valve 7...
...Control device 9 ...Control fluid 12 ...Mold
Claims (2)
る金型温度調節方法において、前記制御流体を熱交換器
を介して前記金型に流通させ、この熱交換器に高温熱媒
体と低温熱媒体を選択的に流通させて前記制御流体の温
度を時間に対して所定の割合で変化させることを特徴と
する金型温度調節方法。(1) In the mold temperature adjustment method, the control fluid is passed through the mold to control the mold temperature, the control fluid is passed through the mold through a heat exchanger, and the heat exchanger is heated to a high temperature. 1. A mold temperature control method, comprising selectively flowing a hot heating medium and a low-temperature heating medium to change the temperature of the control fluid at a predetermined rate over time.
ンクから供給される低温熱媒体を、制御装置により制御
される方向切換弁で選択し各熱媒体の流量は流量制御弁
の開度を制御して調節することを特徴とする前記特許請
求の範囲第（１）項記載の金型温度調節方法。(2) The high-temperature heat medium supplied from the high-temperature tank and the low-temperature heat medium supplied from the low-temperature tank are selected by a directional switching valve controlled by a control device, and the flow rate of each heat medium is determined by the opening degree of the flow rate control valve. The mold temperature adjusting method according to claim 1, wherein the mold temperature is adjusted in a controlled manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1382286A JPS62173218A (en) | 1986-01-27 | 1986-01-27 | Mold temperature control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1382286A JPS62173218A (en) | 1986-01-27 | 1986-01-27 | Mold temperature control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62173218A true JPS62173218A (en) | 1987-07-30 |
Family
ID=11843967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1382286A Pending JPS62173218A (en) | 1986-01-27 | 1986-01-27 | Mold temperature control method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62173218A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5182117A (en) * | 1990-04-26 | 1993-01-26 | Toshiba Machine Co., Ltd. | Heating and cooling unit |
| CN102529050A (en) * | 2010-12-31 | 2012-07-04 | 上海富亿德塑胶有限公司 | Heat exchange device for high gloss mold temperature controller |
| WO2019148224A1 (en) * | 2018-02-01 | 2019-08-08 | Wittmann Kunststoffgeräte Gmbh | Temperature control device and method for the open-loop and closed-loop control of a temperature control device for a processing device, in particular an injection molding machine |
| JP2025502698A (en) * | 2021-12-20 | 2025-01-28 | フリゲル フイレンツェ ソチエタ ペル アチオーニ | Machines for controlling the temperature of parts of industrial plants adapted to the formation of products |
-
1986
- 1986-01-27 JP JP1382286A patent/JPS62173218A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5182117A (en) * | 1990-04-26 | 1993-01-26 | Toshiba Machine Co., Ltd. | Heating and cooling unit |
| CN102529050A (en) * | 2010-12-31 | 2012-07-04 | 上海富亿德塑胶有限公司 | Heat exchange device for high gloss mold temperature controller |
| WO2019148224A1 (en) * | 2018-02-01 | 2019-08-08 | Wittmann Kunststoffgeräte Gmbh | Temperature control device and method for the open-loop and closed-loop control of a temperature control device for a processing device, in particular an injection molding machine |
| JP2025502698A (en) * | 2021-12-20 | 2025-01-28 | フリゲル フイレンツェ ソチエタ ペル アチオーニ | Machines for controlling the temperature of parts of industrial plants adapted to the formation of products |
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