JPH0432729B2 - - Google Patents
Info
- Publication number
- JPH0432729B2 JPH0432729B2 JP20209284A JP20209284A JPH0432729B2 JP H0432729 B2 JPH0432729 B2 JP H0432729B2 JP 20209284 A JP20209284 A JP 20209284A JP 20209284 A JP20209284 A JP 20209284A JP H0432729 B2 JPH0432729 B2 JP H0432729B2
- Authority
- JP
- Japan
- Prior art keywords
- heating
- conductor
- heating conductor
- passage
- tool
- 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
Links
- 238000010438 heat treatment Methods 0.000 claims description 105
- 239000004020 conductor Substances 0.000 claims description 54
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 239000011810 insulating material Substances 0.000 claims description 10
- 238000005485 electric heating Methods 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 description 11
- 229910010293 ceramic material Inorganic materials 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000010959 steel Substances 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/30—Flow control means disposed within the sprue channel, e.g. "torpedo" construction
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は加熱導体を有する電気式の加熱部材で
あつて、この加熱導体が加熱通路内に、かつ、こ
の加熱通路から分岐して射出成形型の型キヤビテ
イー列に通じる、加熱通路工具の注入通路内に配
置されている形式のものに関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is an electric heating member having a heating conductor, the heating conductor being in a heating passage and branching off from the heating passage to form an injection mold. It is of the type arranged in the injection passage of the heated passage tool leading to the mold cavity row.
従来の技術
オーストラリア国特許第286607号明細書から公
知であるこのような形式の電気式の加熱部材にお
いては加熱導体が棒状に構成されて加熱通路の中
央を延びており、かつ、この加熱通路から分岐し
て射出成形型の型キヤビテイー列に通じる注入通
路の範囲でループ状に形成されている。加熱通路
及びこの加熱通路から分岐する注入通路内にはプ
ラスチツク溶融物が圧力をかけられて導入され
る。この圧力は加熱導体に機械的な負荷を生ぜし
める。公知の加熱部材においてはこの機械的な負
荷の作用を受けて加熱導体が変形させられて工具
壁部に接触してしまう恐れがあり、短絡及び運転
中断を生ぜしめる結果となる。PRIOR ART In an electric heating element of the type known from Australian Patent No. 286607, the heating conductor is constructed in the form of a rod and extends through the center of the heating passage, and from this heating passage It is loop-shaped in the region of the injection channel which branches off and leads to the row of mold cavities of the injection mold. The plastic melt is introduced under pressure into the heating channel and into the injection channel branching off from the heating channel. This pressure creates a mechanical load on the heating conductor. In known heating elements, under the influence of this mechanical load, the heating conductor can be deformed and come into contact with the tool wall, resulting in short circuits and interruptions in operation.
発明が解決しようとする問題点
本発明の課題は冒頭に述べた形式の電気式の加
熱部材を改良して、運転中に加熱通路工具の、組
込まれた加熱導体とは異なる熱膨張が生じたとし
ても加熱通路工具の流出開口に対する加熱導体の
位置決めが変わらず、しかもこの加熱導体が加熱
通路工具に突発的に流入する材料溶融物による負
荷を吸収することができるようにすることにあ
る。Problem to be Solved by the Invention The object of the invention is to improve an electric heating element of the type mentioned in the introduction so that during operation a heating channel tool undergoes a different thermal expansion than the installed heating conductor. However, the positioning of the heating conductor relative to the outlet opening of the heating channel tool remains the same, and the heating conductor is capable of absorbing the load due to the material melt suddenly flowing into the heating channel tool.
問題点を解決するための手段
この課題は本発明によれば加熱導体がメアンダ
状に構成されていて、かつ、加熱導体に接触する
絶縁材から成る２つのプレートの間に配置されて
おり、この加熱導体が支承体に支持されているか
又はこの支承体に結合されており、この支承体が
その端部で加熱通路工具の支承用切欠き内に形状
接続によつて固定されていることによつて解決さ
れた。Means for Solving the Problem According to the present invention, the heating conductor is constructed in a meander shape and is arranged between two plates made of an insulating material that are in contact with the heating conductor. The heating conductor is supported on or connected to a bearing, which is fixed at its end in the bearing recess of the heating channel tool by form-fitting. It was resolved.
加熱導体がメアンダ状に構成されていることに
よつてはこの加熱導体はその長手方向で形状弾性
的に、かつ、材料は適当に選択することによつて
材料弾性的に構成されている。 Due to the meandering construction of the heating conductor, the heating conductor can be configured elastically in its longitudinal direction, and, by selecting a suitable material, elastically in its material.
加熱導体を支持しているか又はこの加熱導体に
結合された支承体がその端部で形状接続によつて
加熱通路工具に固定されていることによつては加
熱導体はこの加熱通路工具の熱膨張によつて生じ
る運動に伴なつて強制的に一緒に運動させられ
る。このことは加熱導体が形状弾性的で、かつ、
材料弾性的であることによつて加熱導体に損傷を
与えることなしに可能である。加熱導体が運転中
に生じる熱膨張のもとで加熱通路工具と同時的に
運動させられることによつてはこの加熱通路工具
の流出開口に対する加熱導体の常に正確な位置決
めが保証される。このようにして申し分のない射
出成形運転のための必要条件が与えられる。 If the bearing supporting or connected to the heating conductor is fastened at its end to the heating channel tool by form-locking, the heating conductor can absorb the thermal expansion of the heating channel tool. are forced to move together with the movement caused by. This means that the heating conductor is shape elastic and
This is possible without damaging the heating conductor due to the elasticity of the material. The fact that the heating conductor is moved simultaneously with the heating channel tool under the thermal expansion occurring during operation ensures a precise positioning of the heating conductor at all times with respect to the outlet opening of the heating channel tool. In this way, the prerequisites for a satisfactory injection molding operation are provided.
加熱導体の中央範囲に配置され、一方では加熱
導体に、他方では加熱通路工具の通路の内側に支
持された、絶縁材から製造されたプレートによつ
ては加熱導体の確実な保持がこの加熱導体の全長
に亘つて得られ、この確実な保持は材料溶融物が
加熱通路工具の加熱通路から流出開口への経路に
おいて加熱導体を貫流するか若しくはこの加熱導
体の周囲を流れる時にも維持される。 A reliable holding of the heating conductor is achieved by a plate made of insulating material, which is arranged in the central area of the heating conductor and is supported on the heating conductor on the one hand and inside the passage of the heating channel tool on the other hand. This secure retention is maintained even when the material melt flows through or around the heating conductor in its path from the heating channel to the outlet opening of the heating channel tool.
絶縁材、例えばセラミツク材から製造されたこ
のプレートは加熱導体のウエブと共に材料溶融物
のための流動通路を成す。 This plate, made of an insulating material, for example a ceramic material, together with the heating conductor web forms a flow path for the material melt.
実施例
加熱通路工具１は加熱通路２を有しており、こ
の加熱通路２に、材料溶融物が流入開口３を通し
て供給される。Embodiment The heating channel tool 1 has a heating channel 2 into which a material melt is fed through an inlet opening 3 .
この加熱通路２からは一連の注入通路４が分岐
している。この注入通路４は流出開口５にまで延
びており、この流出開口５から材料溶融物が射出
成形型の型キヤビテイ列に達する。 A series of injection passages 4 branch off from this heating passage 2. The injection channel 4 extends to an outlet opening 5 through which the material melt reaches a row of mold cavities of the injection mold.
加熱通路工具１には加熱導体６ａが設けられて
おり、この加熱導体６ａによつて材料溶融物は加
熱通路２内でも、また、注入通路４内でも加熱さ
れる。この加熱導体６ａはクロムニツケル鋼から
成つていてよく、その端部に接続プレート７を有
している。この接続プレート７には電圧がかけら
れる。加熱導体６ａの、接続プレート７の間にあ
る部分はメアンダ状に構成されていて、かつ、Ｕ
字形に延びるウエブから構成されている。加熱導
体６ａの、加熱通路工具の流出開口若しくは射出
成形型の型キヤビテイー列に向けられた下側端部
は尖端部６として構成されている。この尖端部６
で結合された隣接するウエブ８は尖端部６に向か
つて減少する横断面を有している。このように構
成されていることによつて高められた熱効率がこ
の範囲で得られると共に、材料溶融物が申し分の
ない流れ条件のもとでこの加熱通路工具の流出開
口を通つて、射出成形型のキキヤビテイー列に流
入することができるということが保証される。 The heating channel tool 1 is equipped with a heating conductor 6a, by means of which the material melt is heated both in the heating channel 2 and also in the injection channel 4. This heating conductor 6a may be made of chromium nickel steel and has a connecting plate 7 at its end. A voltage is applied to this connecting plate 7. The portion of the heating conductor 6a between the connecting plates 7 is configured in a meander shape, and has a U
It consists of a web extending in the shape of a letter. The lower end of the heating conductor 6a, which is directed towards the outlet opening of the heating channel tool or the mold cavity row of the injection mold, is configured as a tip 6. This tip 6
Adjacent webs 8 , which are joined together, have a cross section that decreases towards the tip 6 . Due to this configuration, an increased thermal efficiency is obtained in this range, and the material melt passes through the outlet opening of this heating channel tool under satisfactory flow conditions to the injection mold. It is guaranteed that the current capacity can flow into the capacity column.
図示の実施例においては電圧をかけるための接
続プレート７並びに加熱導体ウエブは方形の横断
面を有している。 In the embodiment shown, the connection plate 7 for applying the voltage as well as the heating conductor web have a rectangular cross section.
接続プレート７の範囲では加熱導体６ａはピン
９を介して加熱通路工具に支承されている。この
ピン９は絶縁材から製造されていてもよい。ピン
が金属から成つている場合には、ピンの端部は絶
縁材、例えばセラミツク材から成るブシユ１０内
に支承されなければならない。このブシユ１０は
この加熱通路工具の対応する切欠きに配置されて
いる。 In the area of the connecting plate 7, the heating conductor 6a is supported via pins 9 on the heating channel tool. This pin 9 may also be manufactured from an insulating material. If the pin is made of metal, the end of the pin must be supported in a bushing 10 of insulating material, for example ceramic material. This bushing 10 is arranged in a corresponding recess of this heating channel tool.
接続プレート７の間では加熱導体６ａがピン１
１に支承される。このピンは加熱導体６ａの横ウ
エブ１２を、加熱通路工具の流出開口５とは反対
の側で下から掴んでいる。このピンも絶縁材か又
は金属から成つていてよい。金属から成つている
場合にはピン１１の端部は第２図に示されている
ように絶縁材から成るブシユ１０内に支承されな
ければならない。 Between the connecting plates 7, the heating conductor 6a connects to pin 1.
Supported by 1. This pin grips the transverse web 12 of the heating conductor 6a from below on the side opposite the outlet opening 5 of the heating channel tool. This pin may also be made of insulating material or of metal. If it is made of metal, the end of the pin 11 must be supported in a bushing 10 of insulating material, as shown in FIG.
加熱導体の、接続プレート７の間にある部分は
絶縁材、例えばセラミツク材から成るプレート１
３の間に配置されていて、かつ、第１図及び第２
図に示されているように加熱導体６ａの中央範囲
に亘つて、しかしながら加熱通路２の全長に亘つ
て延びている。第２図から明らかなように、この
プレート１３は加熱導体６ａにも、また加熱通路
の内側の面にも触しているので、加熱導体の確実
な保持が与えられる。さらに加熱導体の多数の鉛
直方向ウエブはプレート１３と共に流動通路１４
を成し、この流動通路１４を通して、材料溶融物
が加熱通路工具の対応する流出開口５の方向に流
される。 The part of the heating conductor between the connecting plates 7 is made of an insulating material, e.g. a plate 1 of ceramic material.
3, and is located between FIGS. 1 and 2.
As shown in the figure, it extends over the central region of the heating conductor 6a, but over the entire length of the heating channel 2. As is clear from FIG. 2, this plate 13 touches both the heating conductor 6a and also the inner surface of the heating channel, so that a reliable retention of the heating conductor is provided. Furthermore, a number of vertical webs of heating conductors together with the plate 13 flow through the flow channels 14.
, through which the material melt flows in the direction of the corresponding outlet opening 5 of the heating channel tool.
加熱導体６ａの尖端部６の範囲で加熱を強める
ためには第１図に示されているようにこの尖端部
に、電圧のかけられる加熱線材１５を結合するこ
とができる。 In order to intensify the heating in the area of the tip 6 of the heating conductor 6a, a heating wire 15 to which a voltage can be applied can be connected to this tip, as shown in FIG.
第１図は本発明による電気式の加熱部材を有す
る加熱通路工具の鉛直断面図、第２図は第１図の
−線に沿つた断面図、第３図は第１図と第２
図に示された電気式の加熱部材の加熱導体の正面
図、第４図は第３図の−線に沿つた断面図で
ある。
１……加熱通路工具、２……加熱通路、３……
流入開口、４……注入通路、５……流出開口、６
……尖端部、６ａ……加熱導体、７……接続プレ
ート、８……ウエブ、９……ピン、１０……ブシ
ユ、１１……ピン、１２……横ウエブ、１３……
プレート、１４……流動通路、１５……加熱線
材。
FIG. 1 is a vertical cross-sectional view of a heating passage tool having an electric heating member according to the present invention, FIG. 2 is a cross-sectional view taken along the - line of FIG. 1, and FIG.
FIG. 4 is a front view of the heating conductor of the electric heating member shown in the figure, and FIG. 4 is a sectional view taken along the line - in FIG. 1... Heating passage tool, 2... Heating passage, 3...
Inflow opening, 4... Injection passage, 5... Outflow opening, 6
... Tip, 6a ... Heating conductor, 7 ... Connection plate, 8 ... Web, 9 ... Pin, 10 ... Bush, 11 ... Pin, 12 ... Horizontal web, 13 ...
Plate, 14...flow passage, 15...heating wire.
Claims (1)
て、この加熱導体が加熱通路内に、かつ、かの加
熱通路から分岐して射出成形型の型キヤビテイー
列に通じる、加熱通路工具の注入通路内に配置さ
れている形式のものにおいて、 加熱導体６ａがメアンダ状に構成されていて、
かつ、加熱導体６ａに接触する絶縁材から成る２
つのプレート１３の間に配置されており、この加
熱導体６ａが支承体に支持されているか又はこの
支承体に結合されており、この支承体がその端部
で加熱通路工具１の支承用切欠き内に形状接続に
よつて固定されていることを特徴とする、加熱導
体を有する、電気式の加熱部材。 ２ 前記加熱導体６ａの、加熱通路工具１の流出
開口５に延びる互いに結合されたウエブ８が流出
開口５に向かつて縮少する横断面を有している、
特許請求の範囲第１項記載の加熱部材。 ３ 前記加熱導体６ａの、射出成形型の型キヤビ
テイー列に向けられた端部が尖端部６として構成
されている、特許請求の範囲第２項記載の加熱部
材。 ４ 前記加熱導体６ａの横ウエブ１２が加熱通路
工具の流出開口５とは反対の側でピン１１に支持
されている、特許請求の範囲第１項記載の加熱部
材。 ５ 前記ピン１１が金属から製造されており、こ
のピン１１の端部が加熱通路工具の対応する受容
部内に配置された絶縁材から成るプシユ１０に係
合している、特許請求の範囲第４項記載の加熱部
材。 ６ 前記ピン１１が加熱導体６ａに固定されてい
る、特許請求の範囲第１項記載の加熱部材。 ７ 前記加熱導体６ａの端部に接続プレート７が
電圧をかけるために設けられており、この接続プ
レート７並びに加熱導体ウエブが方形の横断面を
有している、特許請求の範囲第１項から第６項ま
でのいずれか１項記載の加熱部材。 ８ 前記加熱導体６ａの少なくとも１つの尖端部
６に、電圧のかけられた加熱線材１５が結合され
ている、特許請求の範囲第１項から第７項までの
いずれか１項記載の加熱部材。[Scope of Claims] 1. An electric heating member having a heating conductor, the heating conductor being in a heating passage and branching from the heating passage to a mold cavity row of an injection mold. In the type disposed in the injection passage of the passage tool, the heating conductor 6a is configured in a meander shape,
and 2 made of an insulating material that contacts the heating conductor 6a.
The heating conductor 6a is supported on or connected to a bearing which, at its end, is arranged between two plates 13 in the bearing recess of the heating channel tool 1. An electric heating element having a heating conductor, characterized in that the heating conductor is fixed therein by a form-fitting connection. 2. the interconnected webs 8 of the heating conductor 6a extending into the outlet opening 5 of the heating channel tool 1 have a cross section that decreases towards the outlet opening 5;
A heating member according to claim 1. 3. The heating element according to claim 2, wherein the end of the heating conductor 6a facing the mold cavity row of the injection mold is configured as a tip 6. 4. Heating element according to claim 1, wherein the transverse webs 12 of the heating conductor 6a are supported on pins 11 on the side opposite the outlet opening 5 of the heating channel tool. 5. The pin 11 is made of metal, the end of which engages a pusher 10 of insulating material arranged in a corresponding receptacle of the heating channel tool. Heating member described in section. 6. The heating member according to claim 1, wherein the pin 11 is fixed to the heating conductor 6a. 7. At the end of the heating conductor 6a a connecting plate 7 is provided for applying a voltage, said connecting plate 7 as well as the heating conductor web having a rectangular cross section. The heating member according to any one of items up to item 6. 8. The heating member according to any one of claims 1 to 7, wherein a heating wire 15 to which a voltage is applied is coupled to at least one tip 6 of the heating conductor 6a.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19833335294 DE3335294A1 (en) | 1983-09-29 | 1983-09-29 | Electrically operated heating element for a hot-runner mould |
| DE3335294.1 | 1983-09-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60179217A JPS60179217A (en) | 1985-09-13 |
| JPH0432729B2 true JPH0432729B2 (en) | 1992-06-01 |
Family
ID=6210406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20209284A Granted JPS60179217A (en) | 1983-09-29 | 1984-09-28 | Electric type heating member with heating conductor |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS60179217A (en) |
| DE (1) | DE3335294A1 (en) |
| ES (1) | ES286461Y (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT286607B (en) * | 1966-08-22 | 1970-12-10 | Mekusta Dr Ferdinand Pauler | Multiple injection mold for thermoplastics with at least one point injection |
-
1983
- 1983-09-29 DE DE19833335294 patent/DE3335294A1/en active Granted
-
1984
- 1984-09-28 JP JP20209284A patent/JPS60179217A/en active Granted
-
1985
- 1985-04-30 ES ES1985286461U patent/ES286461Y/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ES286461Y (en) | 1986-07-01 |
| JPS60179217A (en) | 1985-09-13 |
| DE3335294A1 (en) | 1985-04-18 |
| ES286461U (en) | 1985-12-01 |
| DE3335294C2 (en) | 1991-09-26 |
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