JPS62174112A - Self-temperature control type mold - Google Patents
Self-temperature control type moldInfo
- Publication number
- JPS62174112A JPS62174112A JP1570086A JP1570086A JPS62174112A JP S62174112 A JPS62174112 A JP S62174112A JP 1570086 A JP1570086 A JP 1570086A JP 1570086 A JP1570086 A JP 1570086A JP S62174112 A JPS62174112 A JP S62174112A
- Authority
- JP
- Japan
- Prior art keywords
- cavity
- temperature
- cooling
- self
- heater
- 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
- 238000001816 cooling Methods 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000000465 moulding Methods 0.000 claims description 8
- 239000011347 resin Substances 0.000 abstract description 12
- 229920005989 resin Polymers 0.000 abstract description 12
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 abstract description 3
- 229910002113 barium titanate Inorganic materials 0.000 abstract description 3
- 239000002826 coolant Substances 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 229910015806 BaTiO2 Inorganic materials 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 1
- 238000004781 supercooling Methods 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
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)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は溶融樹脂の成形加工に用いる金型に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a mold used for molding molten resin.
溶融樹脂の成形加工においては、成形品の変形防止の観
点から、金型キャビティ内の樹脂の均一冷却が重要な問
題となってくる。そのため、従来は例えば特開昭５７−
１９５６１０に示される様に、第２図の如く金型内に配
置された冷却管２，３の各流量をコントロールして、均
一冷却を画っている。In the molding process of molten resin, uniform cooling of the resin within the mold cavity is an important issue from the viewpoint of preventing deformation of the molded product. Therefore, conventionally, for example, JP-A-57-
195610, uniform cooling is achieved by controlling the flow rates of each of the cooling pipes 2 and 3 arranged in the mold as shown in FIG.
この従来例では、第２図に示した通り、温度センサ１で
金型温度を検出して、温度調節器１４を通して、流量調
整用の電磁バルブ４，５を選択的に開閉して、流量調整
を行なう。In this conventional example, as shown in FIG. 2, the temperature of the mold is detected by a temperature sensor 1, and the electromagnetic valves 4 and 5 for flow rate adjustment are selectively opened and closed through a temperature controller 14 to adjust the flow rate. Do the following.
上記従来例では、設定温度に対してのｏｎ−ｏｆｆ制御
であり、スムーズな温度制御が出来ない問題があった。In the conventional example described above, on-off control is performed for the set temperature, and there is a problem that smooth temperature control cannot be performed.
また、ｏｎ−ｏｆｆ制御ではなく流調弁等を用いた連続
的な制御も考えられるが、実際の成形品の形状は複雑多
岐に渡り、冷却管をキャビティ近傍に設置できない場合
が応々にしてあり、この様な場合には、流量調整だけで
は均一冷却は困難である。Continuous control using flow control valves, etc., instead of on-off control can also be considered, but the shapes of actual molded products are complex and diverse, and in some cases it may not be possible to install cooling pipes near the cavity. In such cases, it is difficult to achieve uniform cooling just by adjusting the flow rate.
本発明の目的は、形状が複雑で冷却管をキャビティ近傍
に設置することが不可能な場合でも、キャビティ内の樹
脂の均一冷却が可能な成形用金型を提供する事にある。An object of the present invention is to provide a molding die that can uniformly cool the resin in the cavity even when the mold has a complicated shape and it is impossible to install a cooling pipe near the cavity.
本発明では、キャビティ近傍の１ケ所又は数ケ所に自己
制御性のヒータユニットを設置し、そのヒータユニット
と冷却管により、上記目的を達成しようとしたものであ
る。The present invention attempts to achieve the above object by installing a self-controlling heater unit at one or several locations near the cavity, and using the heater unit and cooling pipe.
金型内の冷却管の配置および冷却材流量を、ヒータユニ
ットが働かない時には、過冷却となる様に設定しておけ
ば、複数の自己制御性ヒータユニットにより、各ヒータ
ユニツ１−の設置箇所の温度は一定に保持され、キャビ
ティ内の樹脂の均一冷却が可能となる。By setting the arrangement of the cooling pipes in the mold and the flow rate of the coolant so that supercooling occurs when the heater unit does not work, the multiple self-controlling heater units can control the installation location of each heater unit 1-. The temperature is maintained constant, allowing uniform cooling of the resin within the cavity.
本発明の実施例を第１図（ａ）に示す。金型６にはキャ
ビティ７内の樹脂を冷却するのに、充分な冷却能力を有
する様に冷却管８の配置および冷却材流量を設定してお
く。キャビティ７の近傍にはヒータユニッ１〜９を複数
個設置し、そのヒータユニット９は、第１図（ｂ）の如
くある温度で急激に抵抗が増える様な材料（例えば、チ
タン酸バリウムＢａＴｉ０２） を用いた感温部１０
とヒータ部］１で構成され、端子１２で外部電源１３と
接続されている。感温部１０を構成する材料、チタン酸
バリウムＢ ａ Ｔ ｊ Ｏ２は第３図に示す様にある
温度Ｔｏで急激に抵抗が増加する。設定温度Ｔ。An embodiment of the present invention is shown in FIG. 1(a). The arrangement of the cooling pipes 8 and the flow rate of the coolant are set so that the mold 6 has sufficient cooling capacity to cool the resin in the cavity 7. A plurality of heater units 1 to 9 are installed near the cavity 7, and the heater unit 9 is made of a material (for example, barium titanate BaTi02) whose resistance increases rapidly at a certain temperature, as shown in FIG. 1(b). Temperature sensing part 10 used
and a heater section] 1, and is connected to an external power source 13 through a terminal 12. As shown in FIG. 3, the resistance of barium titanate B a T j O2, which is the material constituting the temperature sensing portion 10, increases rapidly at a certain temperature To. Set temperature T.
は鉛ｐｂを添加する事により、任意に設定する事が可能
となる。ヒータユニット９は、−巡の閉ループを構成し
ており、電圧Ｖを一定とすればヒータ１１の発熱量Ｑは
次式で表される。can be set arbitrarily by adding lead PB. The heater unit 9 constitutes a closed loop, and if the voltage V is constant, the amount of heat generated Q of the heater 11 is expressed by the following equation.
ここで、Ｒｈ ：ヒータの抵抗、Ｒ８：感温部の抵抗で
ある。従って、感温部１０の温度が一定値Ｔ。Here, Rh: resistance of the heater, R8: resistance of the temperature sensing section. Therefore, the temperature of the temperature sensing section 10 is a constant value T.
を越えると、感温部の抵抗Ｒｓが急増し、ヒータでの発
熱量が激減する。感温部１０の温度がＴ。When the value exceeds 0, the resistance Rs of the temperature sensing portion increases rapidly and the amount of heat generated by the heater decreases sharply. The temperature of the temperature sensing part 10 is T.
から下がると、今度は逆に発熱量が増大する。故に、任
意の温度Ｔｏに保持でき、発熱量も任意に選べる自己制
御性のヒータユニットが構成できる。When the temperature decreases, the amount of heat generated increases. Therefore, a self-controllable heater unit that can be maintained at any temperature To and can arbitrarily select the amount of heat generated can be constructed.
また、他に形状記憶合金、サーミスタ等を用いた感温ス
イッチをヒータユニットに組み込み、自己制御性を持た
せる事もできる。In addition, a temperature-sensitive switch using a shape memory alloy, a thermistor, etc. can be incorporated into the heater unit to provide self-control.
本実施例によれば、ヒータユニット９が働かない状態で
過冷却となるように、金型の冷却能力を設定しておけば
、自己制御性のヒータユニットの設置部で所定の温度に
制御でき、外部から制御する事なく、キャビティ内の樹
脂の均一冷却ができる。また、複数個設置したヒータユ
ニットを交換可能かつ任意の設定温度にすることで、金
型内の温度分布が任意に設定でき、冷却状況を任意に制
御する事ができる効果がある。According to this embodiment, if the cooling capacity of the mold is set so that it is supercooled when the heater unit 9 is not working, the temperature can be controlled to a predetermined temperature at the installation part of the self-controlling heater unit. , the resin inside the cavity can be cooled uniformly without external control. Furthermore, by making the plurality of installed heater units replaceable and setting the temperature to an arbitrary value, the temperature distribution within the mold can be arbitrarily set, and the cooling situation can be arbitrarily controlled.
本発明によれば、複雑な製品形状を有する成形加工にお
いても、キャビティ内の樹脂の冷却状態を、外部からの
制御なしに、均一または任意の設定状態に制御すること
ができる。According to the present invention, even in a molding process having a complicated product shape, the cooling state of the resin in the cavity can be controlled uniformly or to an arbitrary setting state without external control.
また、ヒータユニットに自己制御性を持たせる事により
、構造が簡単で高機能（温度制御性）の金型が提供でき
る。Furthermore, by providing self-control to the heater unit, a mold with a simple structure and high functionality (temperature control) can be provided.
第１図（ａ）は金型の本発明の実施例を示す図、第１図
（ｂ）は第１図（ａ）のヒータユニットの回路図、第２
図は従来の金型温度の制御を示した図、第３図は本実施
例の感温部を構成する材料の温度−抵抗特性図である。
１・・・温度センサー、２，３・・・冷却管、４，５・
・・電磁バルブ、６・・・金型、７・・・キャビティ、
８・・・冷却管、９・・・ヒータユニット、１０・・・
感温部、１１・・・ヒータ、１２・・・端子、１３・・
・外部電源、１４・・・温度調節器。FIG. 1(a) is a diagram showing an embodiment of the present invention of a mold, FIG. 1(b) is a circuit diagram of the heater unit of FIG. 1(a), and FIG.
This figure shows conventional mold temperature control, and FIG. 3 is a temperature-resistance characteristic diagram of the material constituting the temperature sensing section of this embodiment. 1... Temperature sensor, 2, 3... Cooling pipe, 4, 5...
... Solenoid valve, 6... Mold, 7... Cavity,
8... Cooling pipe, 9... Heater unit, 10...
Temperature sensing part, 11... Heater, 12... Terminal, 13...
- External power supply, 14...temperature controller.
Claims (1)
内のキャビティ近傍に温度に対する自己制御性を有する
ヒータユニットを１個あるいは複数個設け該成形用金型
の温度制御を行なわせたことを特徴とする自己温度制御
型成形用金型。 ２、温度に対する自己制御性を有する該ヒータユニット
の制御機構に、ある温度でその電気抵抗が急激に増大す
る材料を用いた事を特徴とする特許請求の範囲第１項に
記載の自己温度制御型成形用金型。[Scope of Claims] 1. In a molding mold having a cooling pipe, one or more heater units having self-controlling temperature are provided near the cavity in the molding mold. A self-temperature control molding mold characterized by temperature control. 2. The self-temperature control type according to claim 1, characterized in that the control mechanism of the heater unit that has self-control over temperature uses a material whose electrical resistance rapidly increases at a certain temperature. Molding mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1570086A JPS62174112A (en) | 1986-01-29 | 1986-01-29 | Self-temperature control type mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1570086A JPS62174112A (en) | 1986-01-29 | 1986-01-29 | Self-temperature control type mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62174112A true JPS62174112A (en) | 1987-07-30 |
Family
ID=11896045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1570086A Pending JPS62174112A (en) | 1986-01-29 | 1986-01-29 | Self-temperature control type mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62174112A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6274077B1 (en) * | 1997-06-10 | 2001-08-14 | Daewon Paptin Foam Co., Ltd. | Manufacturing method for a buffer and heat-insulating material made of a foamed cellulose substance |
| JP2004074629A (en) * | 2002-08-20 | 2004-03-11 | Tokai Rika Co Ltd | Mold assembly and molding method |
| US7824725B2 (en) | 2007-03-30 | 2010-11-02 | The Coca-Cola Company | Methods for extending the shelf life of partially solidified flowable compositions |
-
1986
- 1986-01-29 JP JP1570086A patent/JPS62174112A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6274077B1 (en) * | 1997-06-10 | 2001-08-14 | Daewon Paptin Foam Co., Ltd. | Manufacturing method for a buffer and heat-insulating material made of a foamed cellulose substance |
| JP2004074629A (en) * | 2002-08-20 | 2004-03-11 | Tokai Rika Co Ltd | Mold assembly and molding method |
| US7824725B2 (en) | 2007-03-30 | 2010-11-02 | The Coca-Cola Company | Methods for extending the shelf life of partially solidified flowable compositions |
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