JPS581213A - Temperature controller - Google Patents
Temperature controllerInfo
- Publication number
- JPS581213A JPS581213A JP56100038A JP10003881A JPS581213A JP S581213 A JPS581213 A JP S581213A JP 56100038 A JP56100038 A JP 56100038A JP 10003881 A JP10003881 A JP 10003881A JP S581213 A JPS581213 A JP S581213A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- heater
- contacts
- power
- switch
- 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
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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/832—Heating
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92047—Energy, power, electric current or voltage
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92904—Die; Nozzle zone
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Control Of Temperature (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は樹脂の押出成形機、射出成形機及び化学、繊輪
プラント等における各機器等の温度制御に関する亀ので
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the temperature control of resin extrusion molding machines, injection molding machines, and various equipment in chemical and fiber plants, etc.
従来、例えば押出成形機及び射出成形機等の樹脂成形機
において、成形品の表面形状1機櫨的憤度等を含む仕上
がり状態を一定にするためには、成形品の外形形状、肉
厚変化、樹脂のmm等によっても異なるが、成形品が特
に機械強を要するギヤ等の場合には、成形温度の設定温
度に対する変動幅4h例えば±2℃程度と極めて!sい
場合本あり、又、成形温度に成る程度の幅がある場合に
おいても成形品の品質を一定にするためには設定温度に
おける温度の変動幅が掛い方が好ましく、しかも、機械
の稼動率を高めるためには温度の立上がりを早くする必
#があゐことから、樹脂成形機の温度制御には一般的に
大容量のと−タと冷却用ファンをII繁にオン・オフ制
御することになり、その結果、ファン冷却による熱損失
も極めて大きく、樹脂成形に際しては相当の大電力量を
消費すると云う欠点があう九。Conventionally, in resin molding machines such as extrusion molding machines and injection molding machines, changes in the external shape and wall thickness of the molded product have been used in order to maintain a constant finished state, including the surface shape of the molded product. Although it varies depending on the resin mm, etc., if the molded product is a gear that requires particularly strong mechanical strength, the molding temperature can vary within 4 hours from the set temperature, for example, about ±2°C, which is extremely high! In order to keep the quality of the molded product constant even when there is a wide range of molding temperatures, it is preferable to multiply the temperature fluctuation range by the set temperature. In order to increase the rate, it is necessary to increase the temperature quickly, so to control the temperature of a resin molding machine, a large capacity heater and cooling fan are generally turned on and off frequently. As a result, heat loss due to fan cooling is extremely large, and a considerable amount of electricity is consumed during resin molding.
この対策として、例えばと−タ電源を位相制御する方決
もあるが、この場合、と−I容量が大きいことから位相
制御用80Hの価格が櫃めて高く、しかも、SCRのト
リガ制御にも相当の費用を要し、これが原因で機器の価
格が大幅に上昇する割には温度制御特性も思ったほど向
上しないことか本発明の目的は構造簡単にして容易くし
かも温度制御特性を大幅に向上させた状態でと一タの電
力消費量を大幅に低減させることができる温度制御装置
を提供することによって、前記従来の欠点を除夫するこ
とにある。As a countermeasure to this problem, for example, there is a method of phase controlling the DC power supply, but in this case, the price of the 80H for phase control is extremely high due to the large capacity of the DC motor, and moreover, it is also difficult to control the trigger of the SCR. Although this requires a considerable amount of cost and the price of the equipment has increased significantly, the temperature control characteristics have not been improved as much as expected.The purpose of the present invention is to simplify the structure, make it easier, and significantly improve the temperature control characteristics. An object of the present invention is to eliminate the above-mentioned drawbacks of the conventional temperature control device by providing a temperature control device that can significantly reduce power consumption in a state where the temperature control device is turned on.
次に、本発明の一実施例の構成を図面によって説明する
。Next, the configuration of an embodiment of the present invention will be explained with reference to the drawings.
*ツバ1によってシリンダ2内に供給され九ベレット状
の樹脂を、vyンダ2外肩に取付けられ九番バンドと一
!H1〜H7によって加熱溶融すゐとともに、加熱溶融
したyyンメ2内の樹脂を、篭−タMKよるスクリエウ
50回転によって金製4内に押出し供給する押出成形機
5において、シリンダ2にその長手方向を7ゾーンに分
割した状態で取付けられた2つ割パンドヒ−!H1〜H
7の左右プラッタ別各と−!エレメントH1A、H1B
〜H7人tH7Ba、それぞれ各ゾーン毎に並列に接続
された状態で主開閉器の接点M01〜MC7を介して電
源ACK接続され、かつ、並列に接続された各と一タエ
レメン) HlA、HlB、、、H7ム、H2Nと官列
に、電力用整流器DiA、 DlB xp7ム、 D7
Bと副開閉器の接点MC1ム、 MC1B −MC7A
、 MC7Bとの並列回路を接続し、各並列図路毎に電
力用整流器D1人、 D1B〜D7ム、D7B□肉きを
互いに異方向にするとともに、各開閉器の接点MC1〜
MC7、MC1A、 MCjB〜MC7人、MC7Bは
、シリンダ2の各ゾーン別湿度セン号81〜S7・から
のVリンダ2温度に対応した出力を入力とする全知の温
度調節計TC1〜TC7からの設定温度に対応し九めカ
によってV−ケンサ6を介してオン・オフ制御される。*A nine-bellet-shaped resin is supplied into the cylinder 2 by the collar 1, and is attached to the outer shoulder of the vyda 2 and connected to the ninth band! In the extrusion molding machine 5, the heated and melted resin in the cylinder 2 is extruded and supplied into the metal 4 by 50 revolutions of the screw by the basket MK, and the resin is heated and melted by H1 to H7. A two-split pandohy installed with the area divided into 7 zones! H1~H
7 left and right platters each and -! Element H1A, H1B
~H7 people tH7Ba, each connected in parallel for each zone and connected to the power supply ACK via the contacts M01 to MC7 of the main switch, and each connected in parallel with one element) HlA, HlB,... , H7, H2N and power rectifiers DiA, DlB xp7, D7
B and sub switch contact MC1, MC1B -MC7A
, Connect the parallel circuits with MC7B, connect the power rectifier D1, D1B~D7mu, and D7B□ in different directions for each parallel circuit, and connect the contacts MC1~ of each switch.
MC7, MC1A, MCjB ~ MC7 people, MC7B are settings from omniscient temperature controllers TC1 ~ TC7 that input outputs corresponding to the V cylinder 2 temperature from humidity sensors No. 81 ~ S7 for each zone of cylinder 2. It is controlled on and off via the V-sensor 6 depending on the temperature.
次に、本IJ!施例の作用及び効果について説明する。Next, Hon IJ! The functions and effects of the embodiment will be explained.
このように構成され九温度制御装置7において。In nine temperature control devices 7 configured in this way.
押出成形機5の運転開始時に全接点M01〜MO7%M
C1ム、MCIB 〜MC7A、MC7Bヲ1/KLテ
各に一7zレメ3/)HlA、JB 〜H7ム、 H2
Nを100%通電にするとともに%Vシリンダ1度が温
度調節計T01〜TC7の設定温度を纏えた状態におい
て開開M II の接A MCjA、 MC1B、、、
MC7A、 MC7B ヲ17 K して各を一!ニレ
メン) HIA、 HIB Nl2ム、 H2Nの通電
を正の半波の50%通電と負の半波の50%通電にした
状態で通常の温度調節計T01〜TC7による主開閉器
接点MC1〜MC7のオン・オフ制御をして、その*験
結果を従来の*−7100%通電でのオン・オフ制御と
比較すると、本実施例では第3ffi11’J纏のよう
になるのに対して従来は11!311点線のようにな抄
、と−!電力消費量のみを比較しても本実施例は従来の
一〜−場会によってはi程3
度の電力量で済み、しかも、温度制御特性は、設定温度
での温度変動幅が従来6〜7℃であるのに対して3〜4
℃で温度制御特性が大幅に向上し、芝に、ffi度変動
ピッチも従来約2分であるのに対して約10分と極めて
長く、その分だけ接点MC1〜M07等各電気部品0寿
命を長くすることができるうえ、ファンの運転回数も極
めて少ない。All contacts M01 to MO7%M at the start of operation of the extrusion molding machine 5
C1, MCIB ~ MC7A, MC7B 1/KL Te each one 7z letter 3/) HlA, JB ~ H7, H2
When N is 100% energized and %V cylinder 1 degree covers the set temperature of temperature controllers T01 to TC7, open/open M II is connected A MCjA, MC1B,...
MC7A, MC7B wo17K and one each! With HIA, HIB Nl2m and H2N energized at 50% energization in the positive half wave and 50% energization in the negative half wave, the main switch contacts MC1 to MC7 are controlled by normal temperature controllers T01 to TC7. When on/off control is performed and the *experimental results are compared with the conventional on/off control with -7100% energization, in this example it is like the 3rd ffi11'J, whereas in the conventional case it is 11 !311 Sho like the dotted line, and-! Comparing only the power consumption, this example requires only 3 degrees of power compared to the conventional one. 3-4 compared to 7℃
℃, the temperature control characteristics are greatly improved, and the ffi degree fluctuation pitch is extremely long, about 10 minutes instead of about 2 minutes conventionally, and the lifespan of each electrical component such as contacts MC1 to M07 is reduced by that amount. Not only can the fan be made longer, but the number of times the fan must be operated is also extremely small.
なお、本実施例においては供給電源正負各半波での電力
消費を平衡させる丸め各ゾーン別と一!H1〜H7それ
ぞれを2@賂に分けて正負各半波通電とし九が、これを
正負各半波別負萄容量の平衡を無視すれば各ゾーン別と
−/H1〜H7を直接半波通電とすゐこともできる。In addition, in this embodiment, the power consumption in each positive and negative half-wave of the supply power is balanced by rounding for each zone and one! Divide each of H1 to H7 into two parts and apply half-wave energization to each positive and negative half-wave.If you ignore the balance of the negative capacity for each positive and negative half-wave, you can directly energize each zone by half-wave and -/H1 to H7. You can also do that.
次に、本発明の効果について説明する。Next, the effects of the present invention will be explained.
第1誉回の発゛−は、被温度制御停加熱用と−Iと直列
に接続された主開閉器の接点を、温度センナを介して検
出される被温度制御体の検出温度に従うでオン拳オフ制
御すb際に、前記ヒータと直列に、電力用整流−と副開
閉器の接点との並列回路を接続し、かつ、1Iti記主
開閉器の接点と副開閉器の接点を予め設定され九被温度
制御停め温度制御特性Kit応してオン・オフ制御する
温度制御装置にある。The first activation is performed by turning on the contact of the main switch connected in series with the temperature-controlled stop-heating and -I in accordance with the detected temperature of the temperature-controlled object detected via the temperature sensor. When performing fist-off control, connect a parallel circuit of the power rectifier and the contact of the sub-switch in series with the heater, and set the contacts of the main switch and the sub-switch in advance. The temperature control device is controlled to turn on and off according to the temperature control characteristics.
これによつて、本発明は構造簡単にして容品にしかも温
度制御特性を大幅に向上させた状態でと−IO電力消費
量を大幅に低減させることがてきる効果がある。As a result, the present invention has the advantage of being able to simplify the structure, reduce the packaging, and significantly improve the temperature control characteristics, while significantly reducing -IO power consumption.
次に%#!2書Hの発明は、被温度制御体加納用に一部
と直列に接続された主開閉器の接点を、温度センナを介
して検出される被温度制御体の検出温度に従ってオン・
オフ制御する際に、前記と−タを同一電力容量程度にお
いて2つに分割するとともに分割された各と−!と直列
に、電力用整流器と副開閉器の接点との並列回路を接続
し、かつ、前記電力用整流sIO向きを亙いに異方肉に
するとともに、前記主開閉器の接点と副開閉器の接点を
予め設定され九被温度制御体の温度制御特性に対応して
オン・オフ制御する温度制御装置くある。next%#! The invention of Book 2 H turns on and off the contacts of a main switch connected in series with a part of the temperature-controlled body in accordance with the detected temperature of the temperature-controlled body detected via a temperature sensor.
When performing OFF control, the above-mentioned to-ta is divided into two with approximately the same power capacity, and each of the divided and-! A parallel circuit of the power rectifier and the contacts of the sub-switch is connected in series with the contacts of the main switch and the sub-switch, and the direction of the power rectifier sIO is made highly anisotropic. There is a temperature control device that has preset contact points and performs on/off control in accordance with the temperature control characteristics of the temperature controlled object.
これによって、本発明は第1誉目の発明と同等O効果を
得九状−で、しかも、正員半波別負荷春景を平衡させる
ことができる効果がある。As a result, the present invention has the same effect as the first invention, and has the effect of being able to balance the load of each half of the staff.
第1aaは本発明の一実施例の電気回路を含む説明図、
第21Ilはその電Ill供給波形を含む一部拡大略体
説明図、第5図はその動作特性図である。
■1〜H7・・・ヒータ
D1人、DlB−、D7A、D7B・・・電力用整流器
H1人、H1B、−,H7A、H7B・・・ヒータエレ
メントMC1〜MC7、MC1A、vC1BNMC7A
、MC7B 、、、 接点特許出願人 東新電機工業株
式会社
代理人弁理士岡田英彦
手続補正書(膓)
昭和17年7月20日
特許罎強島田春樹殿
1、事件の表示
昭和り年 00 願第1σ−〇ノ2号事件との関係
特許用m人
4、代理人
5、 補正命令の日付1aa is an explanatory diagram including an electric circuit according to an embodiment of the present invention;
21I is a partially enlarged schematic explanatory diagram including the power Ill supply waveform, and FIG. 5 is a diagram of its operating characteristics. ■1~H7...Heater D1 person, DlB-, D7A, D7B...Power rectifier H1 person, H1B, -, H7A, H7B...Heater element MC1~MC7, MC1A, vC1BNMC7A
, MC7B , Contact patent applicant Toshin Electric Industry Co., Ltd. Representative Patent Attorney Hidehiko Okada Procedural amendment (edit) Patent issued on July 20, 1945 Haruki Shimada 1, Indication of case Showa year 00 Application Relationship with Incident No. 1σ-〇-2
Patent applicant 4, agent 5, date of amendment order
Claims (1)
喪主開閉器の接点を、温度七ンtt介して検出される被
温度制御体の検出温度に従ってオン・オフ制御する際に
、前記ヒータと直列に、電力用整流器と開開閉器の接点
との並列回路を接続し、かつ、前記主開閉器の接点と開
開閉器の接点を予め設定され九被温度制御体の温度制御
特性Kjl応してオン・オフ制御することを特徴とする
温度制御装置。 (り 被温度制御体加熱用ヒータと直列に接続され喪
主開閉器の接点を、温度センナを介して検出される被温
度制御体の検出温度に従ってオン・オフ制御すゐ際に、
1tlli3ヒータを同一電力容量程度において2つく
分割するとともに分割された各と−タと直列に、電力用
整流器と開開閉器の接点と011I1列回路を接続し、
かつ、前記電力用整流器の肉龜を互いに異方向にすると
と−K、前記主開閉−の接点と開開閉器の接点を予め設
定され九被温度制御体の温度制御特性に対応してオン・
オフ制御する仁とを特徴とする温度制御装置。(1) When controlling the contact point of the main switch which is connected in series with the heater for heating the temperature controlled object in accordance with the detected temperature of the temperature controlled object detected through the temperature control circuit, the above-mentioned A parallel circuit of a power rectifier and a contact of the switch is connected in series with the heater, and the contact of the main switch and the contact of the switch are set in advance. A temperature control device that performs on/off control according to the temperature. (When controlling the contact point of the main switch which is connected in series with the heater for heating the temperature controlled object, on/off according to the detected temperature of the temperature controlled object detected via the temperature sensor,
Divide the 1tlli3 heater into two with the same power capacity, and connect the power rectifier, switch contact, and 011I 1-row circuit in series with each divided heater.
When the power rectifiers are oriented in opposite directions, the main switching contacts and the switching switch contacts are set in advance and turned on and off in accordance with the temperature control characteristics of the temperature controlled body.
A temperature control device characterized by an off-control temperature.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56100038A JPS581213A (en) | 1981-06-26 | 1981-06-26 | Temperature controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56100038A JPS581213A (en) | 1981-06-26 | 1981-06-26 | Temperature controller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS581213A true JPS581213A (en) | 1983-01-06 |
Family
ID=14263350
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56100038A Pending JPS581213A (en) | 1981-06-26 | 1981-06-26 | Temperature controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS581213A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1988007446A1 (en) * | 1987-03-31 | 1988-10-06 | Sumitomo Heavy Industries, Ltd. | Injection nozzle of injection molding machines |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5315340B2 (en) * | 1972-06-09 | 1978-05-24 |
-
1981
- 1981-06-26 JP JP56100038A patent/JPS581213A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5315340B2 (en) * | 1972-06-09 | 1978-05-24 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1988007446A1 (en) * | 1987-03-31 | 1988-10-06 | Sumitomo Heavy Industries, Ltd. | Injection nozzle of injection molding machines |
EP0307482A1 (en) * | 1987-03-31 | 1989-03-22 | Sumitomo Heavy Industries, Ltd | Injection nozzle of injection molding machines |
US4875845A (en) * | 1987-03-31 | 1989-10-24 | Sumitomo Heavy Industries, Ltd. | Injection nozzle for an injection molding machine |
EP0307482B1 (en) * | 1987-03-31 | 1994-02-02 | Sumitomo Heavy Industries, Ltd | Injection nozzle of injection molding machines |
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