FR2497477A1 - HEATING ELECTRIC INJECTION NOZZLE FOR SYNTHETIC MATERIAL - Google Patents
HEATING ELECTRIC INJECTION NOZZLE FOR SYNTHETIC MATERIAL Download PDFInfo
- Publication number
- FR2497477A1 FR2497477A1 FR8124533A FR8124533A FR2497477A1 FR 2497477 A1 FR2497477 A1 FR 2497477A1 FR 8124533 A FR8124533 A FR 8124533A FR 8124533 A FR8124533 A FR 8124533A FR 2497477 A1 FR2497477 A1 FR 2497477A1
- Authority
- FR
- France
- Prior art keywords
- heating element
- nozzle body
- injection nozzle
- heated
- compressed
- 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.)
- Withdrawn
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 35
- 238000002347 injection Methods 0.000 title claims abstract description 11
- 239000007924 injection Substances 0.000 title claims abstract description 11
- 229920002994 synthetic fiber Polymers 0.000 title claims description 7
- 239000002184 metal Substances 0.000 claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 10
- 238000005485 electric heating Methods 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- 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
- H05B3/0014—Devices wherein the heating current flows through particular resistances
-
- 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
- B29C45/2737—Heating or cooling means therefor
-
- 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
- B29C45/2737—Heating or cooling means therefor
- B29C2045/2743—Electrical heating element constructions
-
- 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
- B29C45/2737—Heating or cooling means therefor
- B29C2045/2743—Electrical heating element constructions
- B29C2045/2748—Insulating layers covering the electrical heating element
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Resistance Heating (AREA)
Abstract
Description
La présente invention concerne une buse d'injection électrique chauffante pour matière synthétique comportant un élément chauffant tubulaire a forte compression agencé en hélice dans une douille.The present invention relates to an electric heating injection nozzle for synthetic material comprising a tubular heating element with high compression arranged helically in a socket.
Par le brevet allemand NO 2 240 382, on connaît déjà un corps de chauffage tubulaire en forme d'enroulement d'hélicofd; incorporé entre deux douilles et fortement comprimé, ltensemble pouvant être coulissé sur un objet à chauffer.By German patent NO 2 240 382, a tubular heating body in the form of a helicofd winding is already known; incorporated between two sockets and highly compressed, the assembly can be slid over an object to be heated.
Dans le brevet allemand NO 2 222 558, on décrit des corps chauffants pour buses dans lesquelles le conducteur de chauffage hélicoïdal est agencé directement dans une douille double et est incorporé a celles-ci au moyen d'un oxyde métallique. Cette double douille peut etre coulissée sur l'objet à chauffer.In German patent NO 2 222 558, heating bodies for nozzles are described in which the helical heating conductor is arranged directly in a double socket and is incorporated therein by means of a metal oxide. This double socket can be slid over the object to be heated.
Dans ce dernier dispositif connu, le transfert de chaleur entre l'élément chauffant et l'objet a chauffer est meilleur que dans le premier cité ; cependant il existe des difficultés en ce qui concerne l'étanchéité contre l'introduction de particules de matière synthétique et donc une certaine possibilité de détérioration.In this last known device, the heat transfer between the heating element and the object to be heated is better than in the first city; however, there are difficulties with regard to sealing against the introduction of particles of synthetic material and therefore a certain possibility of deterioration.
L'objet de la présente invention est d'éliminer les inconvénier précédents et de créer un corps chauffant électrique qui présente une bonne transmission de chaleur entre l'élément chauffant proprement dit et l'objet à chauffer, qui est absolument étanche l'humidité et contre les matières synthétiques et qui est insensible aux contraintes mécaniques en cours de fonctionnement.The object of the present invention is to eliminate the previous drawbacks and to create an electric heating body which has good heat transmission between the heating element proper and the object to be heated, which is absolutely moisture and against synthetic materials and which is insensitive to mechanical stresses during operation.
A cette fin, selon l'invention, la buse d'injection électrique chauffante pour matière synthétique est caractérisée en ce que l'enroulement de l'élément chauffant tubulaire repose directement contre le corps de buse à chauffer, est incorpore sous une forte compression dans une poudre métallique grâce 3 l'utilisation d'un manchon fermé à ses deux extrémités et est comprimé avec ledit corps de buse.To this end, according to the invention, the electric heating injection nozzle for synthetic material is characterized in that the winding of the tubular heating element rests directly against the nozzle body to be heated, is incorporated under strong compression in a metallic powder thanks to the use of a sleeve closed at its two ends and is compressed with said nozzle body.
Dans la buse d'injection selon l'invention, on obtient un transfert de chaleur optimal entre l'élément chauffant et le corps de buse à chauffer, et de plus, l'ensemble obtenu est particulièrement étanche et peut fonctionner à des températures très élevées.In the injection nozzle according to the invention, an optimal heat transfer is obtained between the heating element and the nozzle body to be heated, and moreover, the assembly obtained is particularly sealed and can operate at very high temperatures. .
Selon une autre particularité de l'invention, entre les spires de l'élément chauffant tubulaire, est interposée une bande métallique profilée adaptée à l'espace déterminé entre les spires. Une telle bande peut être en cuivre ou en une matière analogue. La poudre métallique occupe alors l'espace restant entre les spires de l'élément chauffant et le profilé métallique.According to another feature of the invention, between the turns of the tubular heating element, is interposed a profiled metal strip adapted to the space determined between the turns. Such a strip may be made of copper or a similar material. The metal powder then occupies the space remaining between the turns of the heating element and the metal profile.
La surface extérieure du corps de buse peut comporter une rainure hélicoidale dans laquelle est vissé un élément chauffant hélicoldal préformé.The outer surface of the nozzle body may have a helical groove into which is screwed a preformed helical heating element.
Les figures du dessin annexé feront bien comprendre comment l'invention peut être réalisée.The figures of the appended drawing will make it clear how the invention can be implemented.
La figure l est une vue en coupe longitudinale d'une buse d'injection électrique chauffante selon l'invention.Figure l is a longitudinal sectional view of an electric heating injection nozzle according to the invention.
La figure 2 est une coupe transversale selon la ligne Il-Il de la figure l. Figure 2 is a cross section along line II-II of Figure l.
La figure 3 est une coupe longitudinale de l'élément chauffant tubulaire.Figure 3 is a longitudinal section of the tubular heating element.
Les figures 4 et 5 montrent des variantes de réalisation de la buse selon l'invention avec arrachement partiel. Figures 4 and 5 show alternative embodiments of the nozzle according to the invention with partial cutaway.
La buse chauffante représentée sur les figures l et 2 comporte un élément chauffant tubulaire l en forme d'hélice, un manchon extérieur 2, ainsi que de la poudre métallique 3, par exemple de la poudre de cuivre, qui remplit les espaces intermédiaires entre les spires de l'élément chauffant 1.The heating nozzle shown in FIGS. 1 and 2 comprises a tubular heating element 1 in the form of a helix, an external sleeve 2, as well as metallic powder 3, for example copper powder, which fills the intermediate spaces between the heating element turns 1.
L'élément chauffant 1 comporte de son côté un tube métallique 4, des conducteurs de chauffage 6 incorporés dans ce dernier grâce à une masse isolante 5 et est fortement comprimé de façon connue. Les connexions 7 des conducteurs de chauffage sortent à une extrémité, l'autre extrémité du tube 4 étant obturée de façon étanche par un disque 13 soudé.The heating element 1 for its part comprises a metal tube 4, heating conductors 6 incorporated in the latter by virtue of an insulating mass 5 and is strongly compressed in a known manner. The connections 7 of the heating conductors exit at one end, the other end of the tube 4 being sealed off by a welded disc 13.
L'élément de chauffage 1 est appliqué par coulissement directement contre le corps de buse à chauffer 8 et est recouvert extérieurement par le manchon 7. Une extrémité du manchon 2 est obturée par un disque bombé 9, après quoi la poudre métallique 3 est introduite de l'autre côté et tassée, puis l'autre extrémité est obturée par un disque 10 et l'ensemble est finalement compacté par martelage ou de façon isostatique jusqu'à ce que le diamètre du manchon 2 soit réduit d'environ 20 %.The heating element 1 is applied by sliding directly against the nozzle body to be heated 8 and is covered externally by the sleeve 7. One end of the sleeve 2 is closed by a convex disc 9, after which the metal powder 3 is introduced from the other side and compacted, then the other end is closed by a disc 10 and the assembly is finally compacted by hammering or isostatic until the diameter of the sleeve 2 is reduced by about 20%.
Une extrémité de l'élément chauffant l traverse le manchon 2 et sert de connexion il pour ledit élément chauffant.One end of the heating element 1 passes through the sleeve 2 and serves as connection il for said heating element.
La poudre métallique 3 fortement comprimée de cette manière entoure de tous côtés l'élément tubulaire chauffant et assure une bonne conduction de la chaleur en direction du corps de buse 8.The metal powder 3 strongly compressed in this way surrounds on all sides the tubular heating element and ensures good heat conduction in the direction of the nozzle body 8.
Comme le montre la figure 4, les espaces entre les spires de l'élément tubulaire chauffant l peuvent être en grande partie remplis par une bande profilée métallique 12, par exemple en cuivre, mise en place avant le compactage. Les espaces encore restants peuvent être remplis de poudre de cuivre et l'ensemble est ensuite compacté de la façon décrite. Dans l'exemple de réalisation montrée par la figure 5, le corps de buse 8 est prévu dans sa surface extérieure avec une rainure hélicoîdale 14, dans laquelle est vissé l'élément de chauffage hélicoïdal préfabriqué.As shown in Figure 4, the spaces between the turns of the tubular heating element l can be largely filled by a profiled metal strip 12, for example copper, put in place before compaction. The remaining spaces can be filled with copper powder and the assembly is then compacted as described. In the embodiment shown in Figure 5, the nozzle body 8 is provided in its outer surface with a helical groove 14, in which is screwed the prefabricated helical heating element.
Les espaces encore restants sont remplis d'une poudre métallique 3 et l'ensemble est compacté et comprimé. Cet agencement de rainure hélicoîdale présente l'avantage supplémentaire que la surface de contact disponible pour le transfert de chaleur en direction du corps de buse est encore augmenté.The remaining spaces are filled with a metallic powder 3 and the assembly is compacted and compressed. This helical groove arrangement has the additional advantage that the contact area available for heat transfer to the nozzle body is further increased.
Le transfert de chaleur avec le dispositif selon l'invention est pratiquement le même que celui qui peut être obtenu avec des corps de chauffage moulés. La structure du dispositif selon l'invention est de plus résistante aux vibrations et complètement étanche contre l'humidité et la pénétration de particules de matière synthétique. Un autre avantage très important de la présente invention consiste en ce que la structure décrite présente un renforcement supplémentaire du corps de buse proprement dit ce qui est particulièrement important pour des pressions d'injection élevées de l'ordre de 1000 bars à des températures de 3000C et même plus.The heat transfer with the device according to the invention is practically the same as that which can be obtained with molded heating bodies. The structure of the device according to the invention is moreover resistant to vibrations and completely impermeable against humidity and the penetration of particles of synthetic material. Another very important advantage of the present invention consists in that the structure described has an additional reinforcement of the nozzle body itself, which is particularly important for high injection pressures of the order of 1000 bars at temperatures of 3000C. and even more.
Pour le réglage de la température de fonctionnement, un élément thermo-electrique peut être incorporé à la garniture de poudre métallique et ses connexions peuvent être accessibles latéralement à travers la paroi du manchon 2. For the adjustment of the operating temperature, a thermoelectric element can be incorporated into the metal powder lining and its connections can be accessed laterally through the wall of the sleeve 2.
On remarquera que la présente invention n'est pas limitée aux exemples de réalisation décrits, mais peut être utilisée avantageusement à chaque fois que des matières thermofusibles doivent être chauffées à des températures élevées sous forte pression. It will be noted that the present invention is not limited to the exemplary embodiments described, but can be used advantageously whenever hot-melt materials have to be heated to high temperatures under high pressure.
Claims (4)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19813100092 DE3100092C2 (en) | 1981-01-03 | 1981-01-03 | Electric heating element, in particular for plastic spray nozzles |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2497477A1 true FR2497477A1 (en) | 1982-07-09 |
Family
ID=6122207
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8124533A Withdrawn FR2497477A1 (en) | 1981-01-03 | 1981-12-30 | HEATING ELECTRIC INJECTION NOZZLE FOR SYNTHETIC MATERIAL |
Country Status (3)
Country | Link |
---|---|
AT (1) | AT383771B (en) |
DE (1) | DE3100092C2 (en) |
FR (1) | FR2497477A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0283001A2 (en) * | 1987-03-20 | 1988-09-21 | Jobst Ulrich Gellert | Injection molding nozzle and method |
EP0292952A1 (en) * | 1987-05-27 | 1988-11-30 | SCHEIBENBOGEN GmbH & CO. K.G. SPEZIALMASCHINENBAU | Apparatus for cutting out characters in a template |
EP0748678A1 (en) * | 1995-06-12 | 1996-12-18 | EUROTOOL Beheer B.V. | Sprue bushing with heater element |
EP1386717A1 (en) * | 2002-08-02 | 2004-02-04 | Mold-Masters Limited | Threaded removable heater for a hot runner nozzle |
US7703188B2 (en) | 2005-05-19 | 2010-04-27 | Mold-Masters (2007) Limited | Thermal shroud and method of making same |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3200474C2 (en) * | 1982-01-09 | 1983-12-15 | Türk & Hillinger GmbH, 7200 Tuttlingen | Electric water heater |
DE3347160A1 (en) * | 1983-12-27 | 1985-08-29 | Türk & Hillinger GmbH, 7200 Tuttlingen | ELECTRIC HEATING DEVICE FOR PLASTIC INJECTION NOZZLES |
DE3505517C1 (en) * | 1985-02-18 | 1986-09-04 | Türk & Hillinger GmbH, 7200 Tuttlingen | Electric heating device, in particular for plastics injection nozzles |
DE3541641A1 (en) * | 1985-11-26 | 1987-05-27 | Ego Elektro Blanc & Fischer | Tubular radiator heating device and a method for its production |
JP2991789B2 (en) * | 1991-02-19 | 1999-12-20 | モールド・マスターズ株式会社 | Heating nozzle for plastic molding |
DE202010002136U1 (en) | 2010-02-09 | 2010-05-20 | Türk & Hillinger GmbH | Electric heater |
US11142170B2 (en) * | 2017-06-07 | 2021-10-12 | Ford Global Technologies, Llc | Pop-up washer nozzle with defrost feature |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1359539A (en) * | 1971-10-18 | 1974-07-10 | Pyrotenax Ltd | Electric heating device |
DE2240382C3 (en) * | 1972-08-17 | 1979-12-06 | Tuerk & Hillinger Gmbh & Co, 7200 Tuttlingen | Electric heating element and process for its manufacture |
DE2539785C3 (en) * | 1975-09-06 | 1981-01-29 | Dangelmaier Bernhard U. Co, 7410 Reutlingen | Hot runner nozzle |
DE2856444A1 (en) * | 1978-12-28 | 1980-07-17 | Heinz Stegmeier | Cartridge heater for heating plastics injection mould - has thermocouple removably and coaxially inserted in tube embedded in ceramic |
US4196855A (en) * | 1978-06-29 | 1980-04-08 | Incoe Corporation | Injection cylinder nozzle for molding machines |
-
1981
- 1981-01-03 DE DE19813100092 patent/DE3100092C2/en not_active Expired
- 1981-12-11 AT AT531181A patent/AT383771B/en not_active IP Right Cessation
- 1981-12-30 FR FR8124533A patent/FR2497477A1/en not_active Withdrawn
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0283001A2 (en) * | 1987-03-20 | 1988-09-21 | Jobst Ulrich Gellert | Injection molding nozzle and method |
EP0283001A3 (en) * | 1987-03-20 | 1990-04-25 | Jobst Ulrich Gellert | Injection molding nozzle and method |
EP0292952A1 (en) * | 1987-05-27 | 1988-11-30 | SCHEIBENBOGEN GmbH & CO. K.G. SPEZIALMASCHINENBAU | Apparatus for cutting out characters in a template |
EP0748678A1 (en) * | 1995-06-12 | 1996-12-18 | EUROTOOL Beheer B.V. | Sprue bushing with heater element |
EP1386717A1 (en) * | 2002-08-02 | 2004-02-04 | Mold-Masters Limited | Threaded removable heater for a hot runner nozzle |
US6780003B2 (en) | 2002-08-02 | 2004-08-24 | Mold-Masters Limited | Removable heater for a hot runner nozzle |
US7125243B2 (en) | 2002-08-02 | 2006-10-24 | Mold-Masters Limited | Removable heater for a hot runner nozzle |
US7703188B2 (en) | 2005-05-19 | 2010-04-27 | Mold-Masters (2007) Limited | Thermal shroud and method of making same |
Also Published As
Publication number | Publication date |
---|---|
ATA531181A (en) | 1987-01-15 |
DE3100092A1 (en) | 1982-07-15 |
AT383771B (en) | 1987-08-25 |
DE3100092C2 (en) | 1983-01-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |