JPH055651B2 - - Google Patents
Info
- Publication number
- JPH055651B2 JPH055651B2 JP62269031A JP26903187A JPH055651B2 JP H055651 B2 JPH055651 B2 JP H055651B2 JP 62269031 A JP62269031 A JP 62269031A JP 26903187 A JP26903187 A JP 26903187A JP H055651 B2 JPH055651 B2 JP H055651B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- temperature detection
- heating cylinder
- hopper
- feed zone
- 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
- 238000001514 detection method Methods 0.000 claims description 45
- 238000010438 heat treatment Methods 0.000 claims description 14
- 238000001746 injection moulding Methods 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 6
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は加熱筒の軸方向における異なる位置に
設けた複数の温度検出部により温度検出を行う射
出成形機の温度検出方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a temperature detection method for an injection molding machine in which temperature is detected by a plurality of temperature detection sections provided at different positions in the axial direction of a heating cylinder.
第３図ａに一般的なインラインスクリユ式射出
成形機における射出装置Ｍを示す。射出装置Ｍは
先端に射出ノズル２を、また、後端にホツパー３
を結合した加熱筒４を備え、この加熱筒４にはス
クリユ５を内挿する。一方、加熱筒４はホツパー
３側からフイードゾーンZf、コンプレツシヨンゾ
ーンZc、メータリングゾーンZmに分かれ、それ
ぞれのゾーンを適切な設定温度（200℃前後）に
加熱する三つのヒータ６，７，８を加熱筒４の外
周部に備えている。これらの各ヒータ６，７，８
による温度分布は同図ｂにおいて実線で示す特性
となる。また、第１図のように各ヒータ６，７，
８の中程には温度検出部Ｐ１，Ｐ２，Ｐ３を設定
し、温度センサ（熱電対）１０，１１，１２によ
つて温度検出を行うとともに、フイードバツク制
御により所定の設定温度に維持していた。
FIG. 3a shows an injection device M in a general in-line screw type injection molding machine. The injection device M has an injection nozzle 2 at the tip and a hopper 3 at the rear end.
A heating cylinder 4 is provided, and a screw 5 is inserted into the heating cylinder 4. On the other hand, the heating cylinder 4 is divided into a feed zone Zf, a compression zone Zc, and a metering zone Zm from the hopper 3 side, and three heaters 6, 7, and 8 are used to heat each zone to an appropriate set temperature (around 200°C). is provided on the outer periphery of the heating cylinder 4. Each of these heaters 6, 7, 8
The temperature distribution according to the graph has the characteristics shown by the solid line in FIG. In addition, each heater 6, 7,
Temperature detection units P1, P2, and P3 were set in the middle of 8, and the temperature was detected by temperature sensors (thermocouples) 10, 11, and 12, and the temperature was maintained at a predetermined set temperature by feedback control. .
なお、粒体の成形材料はホツパー３からフイー
ドゾーンZfに供給され、スクリユ５の回転により
加熱筒４の内面とスクリユ溝に沿つて加熱、移送
されてコンプレツシヨンゾーンZcに送られる。
そして、同ゾーンZcにおいて、ヒータによる加
熱と圧縮によるせん断発熱によつて溶融、可塑化
され、さらにメータリングゾーンZmにおいて十
分混練されてスクリユ５の前方に蓄積計量され
る。 The granular molding material is supplied from the hopper 3 to the feed zone Zf, heated and transferred along the inner surface of the heating cylinder 4 and the screw groove by the rotation of the screw 5, and sent to the compression zone Zc.
Then, in the same zone Zc, the material is melted and plasticized by heating by a heater and shear heat generated by compression, and further kneaded sufficiently in the metering zone Zm, and accumulated and measured in front of the screw 5.
〔発明が解決しようとする問題点〕
ところで、上述した従来の温度検出方法は次の
ような問題がある。[Problems to be Solved by the Invention] The conventional temperature detection method described above has the following problems.
加熱筒４のフイードゾーンZfはヒータ６によつ
て、かなりの高温に加熱されるが、隣接するホツ
パー３に連通する部位には成形材料がホツパー３
からフイードゾーンZfへ円滑に供給されるように
冷却水路１５を設けて冷却している。このため、
この付近での温度分布は第３図ｂのように温度勾
配が極めて大きくなる。この結果、冷却部位は隣
接するヒータ６の後部から多量の熱量を奪い、こ
れに伴つて、ヒータ６への電力供給量は大きくな
り、ヒータ６の前部は過熱状態となる。よつて同
図ｂ中仮想線で示すように本来の設定温度分布に
対してオフセツトＳを生じ、結局かかる現象は高
精度で適確な温度検出及び温度制御を妨げる大き
な要因となつていた。 The feed zone Zf of the heating tube 4 is heated to a considerably high temperature by the heater 6, but the molding material is not in contact with the adjacent hopper 3.
A cooling water channel 15 is provided to cool the feed so that it is smoothly supplied from the feed zone Zf to the feed zone Zf. For this reason,
The temperature distribution in this vicinity has an extremely large temperature gradient as shown in FIG. 3b. As a result, the cooling portion absorbs a large amount of heat from the rear part of the adjacent heater 6, and as a result, the amount of power supplied to the heater 6 increases, and the front part of the heater 6 becomes overheated. As a result, an offset S occurs with respect to the original set temperature distribution, as shown by the imaginary line in FIG.
なお、温度センサの数を増して、多点検出方式
を採用すれば検出精度上の問題は解決できるが、
部品点数の増加を招くとともに、構成が複雑とな
り好ましくない。 Note that the problem of detection accuracy can be solved by increasing the number of temperature sensors and adopting a multi-point detection method, but
This is not preferable because it increases the number of parts and makes the configuration complicated.
本発明は上述した従来技術に存在する問題点を
解決した射出成形機の温度検出方法の提供を目的
とするもので、以下に示す検出方法によつて達成
される。
The present invention aims to provide a temperature detection method for an injection molding machine that solves the problems existing in the prior art described above, and is achieved by the detection method described below.
即ち、本発明に係る射出成形機の温度検出方法
は、加熱筒４の後部にホツパー３を備え、かつホ
ツパー３の下方に冷却水路１５……を備えるとと
もに、加熱筒４の軸方向における異なる位置に設
けた複数の温度検出部Ｐ１……により温度検出を
行う射出成形機の温度検出方法において、フイー
ドゾーンZfの温度検出を行う温度検出部Psをフ
イードゾーンZfの最後部に配するとともに、当該
温度検出部Ps及びコンプレツシヨンゾーンPcの
温度検出を行う温度検出部Ｐ２から実測した温度
と、予め記憶した温度勾配データにより、冷却水
路１５……によつてオフセツトしたフイードゾー
ンZfにおける温度を、演算により検出するように
したことを特徴とする。 That is, the temperature detection method for an injection molding machine according to the present invention includes a hopper 3 at the rear of the heating cylinder 4, cooling channels 15 below the hopper 3, and different positions in the axial direction of the heating cylinder 4. In a temperature detection method for an injection molding machine in which temperature is detected by a plurality of temperature detection parts P1 provided in the The temperature in the feed zone Zf offset by the cooling water channel 15 is detected by calculation based on the temperature actually measured from the temperature detection section P2 that detects the temperature of the section Ps and the compression zone Pc, and the temperature gradient data stored in advance. It is characterized by being made to do.
次に、本発明の作用について説明する。 Next, the operation of the present invention will be explained.
本発明に係る温度検出方法によれば、まずフイ
ードゾーンZfの温度検出部Ps及びこの温度検出
部Psの手前となるコンプレツシヨンゾーンZcに
配した温度検出部Ｐ２から温度を実測する。この
際、温度検出部PsはフイードゾーンZfの最後部
に配するため、温度検出部Psは冷却水路１５…
…に基づいてオフセツトした温度勾配の大きい領
域の低温部を検出する。この結果、両検出部Ps
とＰ２により温度勾配を特定可能な温度を検出で
きる。 According to the temperature detection method according to the present invention, first, the temperature is actually measured from the temperature detection section Ps of the feed zone Zf and the temperature detection section P2 disposed in the compression zone Zc in front of this temperature detection section Ps. At this time, since the temperature detection part Ps is arranged at the rearmost part of the feed zone Zf, the temperature detection part Ps is located in the cooling water channel 15...
Detect low-temperature parts in regions with large offset temperature gradients based on... As a result, both detection parts Ps
and P2, it is possible to detect a temperature at which a temperature gradient can be specified.
よつて、フイードゾーンZfにおける他の個所
（温度検出部Ｐ１）の温度は、その位置が解るた
め、温度検出部Ps及び温度検出部Ｐ２から実測
した温度と、予め記憶した温度勾配データによつ
て、演算処理により算出（推定）できる。 Therefore, the temperature at another point (temperature detection section P1) in the feed zone Zf can be determined by the temperature actually measured from the temperature detection section Ps and temperature detection section P2 and the temperature gradient data stored in advance, since its position can be determined. It can be calculated (estimated) through arithmetic processing.
以下には本発明に係る好適な実施例を図面に基
づき詳細に説明する。
Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings.
第１図は本発明方法に基づく温度検出部の配置
図、第２図は本発明方法を実施するための温度検
出系のブロツク系統図、第３図は縦断面で示した
射出装置と各部の温度分布特性図である。 Fig. 1 is a layout diagram of the temperature detection section based on the method of the present invention, Fig. 2 is a block system diagram of the temperature detection system for carrying out the method of the present invention, and Fig. 3 is a longitudinal cross-sectional view of the injection device and its various parts. It is a temperature distribution characteristic diagram.
まず、第１図のヒータ６，７，８は第３図に示
したヒータの同番号に対応し、射出装置における
加熱筒４に装着されている。本発明方法において
は、温度勾配の大きい部位におけるヒータに付設
した温度センサ、つまり、ホツパー３に隣接する
ヒータ６の温度センサ１０を従来の温度検出部Ｐ
１から温度勾配の大きい部位を検出できるヒータ
６の最後部に位置する温度検出部Psへ移転設置
する。 First, the heaters 6, 7, and 8 shown in FIG. 1 correspond to the same numbers of the heaters shown in FIG. 3, and are attached to the heating cylinder 4 in the injection device. In the method of the present invention, the temperature sensor attached to the heater in a region with a large temperature gradient, that is, the temperature sensor 10 of the heater 6 adjacent to the hopper 3 is replaced with the temperature sensor 10 of the heater 6 adjacent to the hopper 3.
1 to the temperature detection section Ps located at the rear end of the heater 6, which can detect areas with large temperature gradients.
そして、第２図に示す温度検出系によつて温度
検出部PsとＰ２の温度を温度センサ１０と１１
により検出し、検出データを演算処理部２０へ付
与する。この演算処理部２０においては例えばデ
ータベースとして記憶する両検出部間の温度勾配
データ（直線又は任意の関数曲線）、さらには温
度検出部Ｐ１の位置データに基づいて、同検出部
Ｐ１の温度を演算処理によつて算出する。 Then, the temperature of the temperature detection parts Ps and P2 is detected by the temperature sensors 10 and 11 using the temperature detection system shown in FIG.
The detection data is provided to the arithmetic processing section 20. The calculation processing unit 20 calculates the temperature of the detection unit P1 based on temperature gradient data (straight line or arbitrary function curve) between both detection units stored as a database, and further position data of the temperature detection unit P1. Calculated by processing.
このように、複数の温度検出部における温度を
検出するに際し、温度勾配が極めて大きくなる部
位が存在すると、温度分布にオフセツトを生じや
すくなるが、温度勾配の大きい部位においては少
なくとも一つの温度センサを移転することによ
り、温度勾配の大きい温度分布状態を関数的ある
いはデータベースとして求めることができる。し
たがつて、両検出部間の内側における任意の温度
検出部、或は両検出部の外側における周辺温度を
推定できる。 In this way, when detecting the temperature in multiple temperature detection parts, if there is a part where the temperature gradient is extremely large, an offset is likely to occur in the temperature distribution. By transferring, a temperature distribution state with a large temperature gradient can be obtained as a function or as a database. Therefore, it is possible to estimate the temperature of any temperature detecting section inside between both detecting sections or the ambient temperature outside both detecting sections.
以上、実施例について詳細に説明したが、本発
明はこのような実施例に限定されるものではな
く、細部の構成、数量、手法等において、本発明
の要旨を逸脱しない範囲で任意に変更実施でき
る。 Although the embodiments have been described in detail above, the present invention is not limited to these embodiments, and the detailed structure, quantity, method, etc. may be arbitrarily changed without departing from the gist of the present invention. can.
このように、本発明に係る射出成形機の温度検
出方法はフイードゾーンの温度検出を行う温度検
出部をフイードゾーンの最後部に配するととも
に、当該温度検出部及びコンプレツシヨンゾーン
の温度検出を行う温度検出部から実測した温度
と、予め記憶した温度勾配データにより、冷却水
路によつてオフセツトしたフイードゾーンにおけ
る温度を、演算により検出するようにしたため、
次のような著効を得る。
As described above, the temperature detection method for an injection molding machine according to the present invention includes arranging the temperature detection part for detecting the temperature of the feed zone at the rearmost part of the feed zone, and adjusting the temperature detection part for detecting the temperature of the temperature detection part and the compression zone. Since the temperature in the feed zone offset by the cooling water channel is detected by calculation using the temperature actually measured from the detection unit and the temperature gradient data stored in advance,
Obtain the following effects:
温度勾配の大きい部位に隣接した部位におけ
る温度のオフセツトを防止することができ、高
精度で適確な温度検出、さらには温度制御を行
うことができる。 Temperature offset in a region adjacent to a region with a large temperature gradient can be prevented, and highly accurate and accurate temperature detection and furthermore temperature control can be performed.
付加する部品は不要であり、低コスト性に優
れるとともに、プログラム変更等で対処できる
ため、容易に実施でき、汎用性に優れる。 No additional parts are required, and the cost is low, and it can be handled by changing the program, so it is easy to implement and has excellent versatility.
第１図：本発明方法に基づく温度検出部の配置
図、第２図：本発明方法を実施するための温度検
出系のブロツク系統図、第３図：縦断面で示した
射出装置と各部の温度分布特性図。
尚図面中。４……加熱筒、Zf……フイードゾー
ン、Zc……コンプレツシヨンゾーン、Ps，Ｐ２
……温度検出部。
Figure 1: Layout diagram of the temperature detection section based on the method of the present invention, Figure 2: Block system diagram of the temperature detection system for carrying out the method of the present invention, Figure 3: Injection device and various parts shown in longitudinal section. Temperature distribution characteristic diagram. Also in the drawing. 4... Heating cylinder, Zf... Feed zone, Zc... Compression zone, Ps, P2
...Temperature detection section.
Claims (1)
ツパー３の下方に冷却水路１５……を備えるとと
もに、加熱筒４の軸方向における異なる位置に設
けた複数の温度検出部Ｐ１……により温度検出を
行う射出成形機の温度検出方法において、フイー
ドゾーンZfの温度検出を行う温度検出部Psをフ
イードゾーンZfの最後部に配するとともに、当該
温度検出部Ps及びコンプレツシヨンゾーンPcの
温度検出を行う温度検出部Ｐ２から実測した温度
と、予め記憶した温度勾配データにより、冷却水
路１５……によつてオフセツトしたフイードゾー
ンZfにおける温度を、演算により検出することを
特徴とする射出成形機の温度検出方法。1 A hopper 3 is provided at the rear of the heating cylinder 4, and a cooling water channel 15 is provided below the hopper 3, and temperature is detected by a plurality of temperature detection parts P1 provided at different positions in the axial direction of the heating cylinder 4. In a temperature detection method for an injection molding machine that performs A temperature detection method for an injection molding machine, characterized in that the temperature in the feed zone Zf offset by the cooling water channel 15 is detected by calculation based on the temperature actually measured from the detection part P2 and temperature gradient data stored in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26903187A JPH01110925A (en) | 1987-10-24 | 1987-10-24 | Temperature detecting method of injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26903187A JPH01110925A (en) | 1987-10-24 | 1987-10-24 | Temperature detecting method of injection molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01110925A JPH01110925A (en) | 1989-04-27 |
| JPH055651B2 true JPH055651B2 (en) | 1993-01-22 |
Family
ID=17466716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26903187A Granted JPH01110925A (en) | 1987-10-24 | 1987-10-24 | Temperature detecting method of injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01110925A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58185237A (en) * | 1982-04-26 | 1983-10-28 | Sumitomo Heavy Ind Ltd | Detection of temperature pattern of injection molder, etc. |
| JPS606426A (en) * | 1983-06-27 | 1985-01-14 | Sumitomo Heavy Ind Ltd | Non-interacting controlling apparatus of injection molder heating cylinder |
| JPS60168622A (en) * | 1984-02-13 | 1985-09-02 | Sumitomo Heavy Ind Ltd | Temperature pattern measuring device of resin of injection molding machine |
-
1987
- 1987-10-24 JP JP26903187A patent/JPH01110925A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58185237A (en) * | 1982-04-26 | 1983-10-28 | Sumitomo Heavy Ind Ltd | Detection of temperature pattern of injection molder, etc. |
| JPS606426A (en) * | 1983-06-27 | 1985-01-14 | Sumitomo Heavy Ind Ltd | Non-interacting controlling apparatus of injection molder heating cylinder |
| JPS60168622A (en) * | 1984-02-13 | 1985-09-02 | Sumitomo Heavy Ind Ltd | Temperature pattern measuring device of resin of injection molding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01110925A (en) | 1989-04-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |