DE19936584B4 - Electrically operated heating element - Google Patents
Electrically operated heating element Download PDFInfo
- Publication number
- DE19936584B4 DE19936584B4 DE1999136584 DE19936584A DE19936584B4 DE 19936584 B4 DE19936584 B4 DE 19936584B4 DE 1999136584 DE1999136584 DE 1999136584 DE 19936584 A DE19936584 A DE 19936584A DE 19936584 B4 DE19936584 B4 DE 19936584B4
- Authority
- DE
- Germany
- Prior art keywords
- heating element
- electrically operated
- element according
- heating
- conductor
- 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
- 238000010438 heat treatment Methods 0.000 title claims abstract description 57
- 239000004020 conductor Substances 0.000 claims abstract description 23
- 239000000155 melt Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000002347 injection Methods 0.000 claims abstract description 3
- 239000007924 injection Substances 0.000 claims abstract description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 239000012768 molten material Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003716 rejuvenation Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/50—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw
- H01R4/5016—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw using a cone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
- B22D17/2038—Heating, cooling or lubricating the injection unit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2272—Sprue channels
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/60—Connections between or with tubular conductors
-
- 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
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
-
- 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
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
- H05B3/44—Heating elements having the shape of rods or tubes non-flexible heating conductor arranged within rods or tubes of insulating material
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Elektrisch betriebenes Heizelement, insbesondere Heißkanaldüse zum Aufheizen von Materialschmelzen in einem Heißkanalwerkzeug (1), in welchem die Materialschmelze mindestens einem Formnest (6) einer Spritzgießform zuführbar ist, wobei dieses Heizelement aus einem zentralen, zylindrischen Heizleiter (12) besteht, der elektrisch isoliert von einem rohrförmigen Mantel (14, 16) umgeben ist, wobei bei einem stabförmig gestalteten inneren Heizleiter (12) die Außenfläche des Mantels (14, 16) mit der Schmelze in Berührung steht, bei einem rohrförmig gestalteten Heizleiter (12) jedoch dessen Rohrinnenfläche, dadurch gekennzeichnet, dass die das Heizelement bildenden Bauteile (12, 14, 16) im Bereich ihrer freien Enden durch eine Pressverbindung elektrisch leitend miteinander verbunden sind.electrical operated heating element, in particular hot runner nozzle for heating material melts in a hot runner mold (1), in which the material melt at least one mold cavity (6) an injection mold supplied is, wherein this heating element of a central, cylindrical Heating conductor (12), which is electrically insulated from a tubular jacket (14, 16) is surrounded, wherein in a rod-shaped inner heating conductor (12) the outer surface of the Mantels (14, 16) is in contact with the melt, in a tubular shape Heating conductor (12) but the pipe inner surface, characterized that the heating element forming components (12, 14, 16) in the area their free ends by a press connection electrically conductive connected to each other.
Description
Die Erfindung bezieht sich auf ein elektrisch betriebenes Heizelement, insbesondere Heißkanaldüse, zum Aufheizen von Materialschmelzen in einem Heißkanalwerkzeug, in welchem die Materialschmelze mindestens einem Formnest einer Spritzgießform zuführbar ist, wobei dieses Heizelement aus einem zentralen, zylindrischen Heizleiter besteht, der elektrisch isoliert von einem rohrförmigen Mantel umgeben ist, wobei bei einem stabförmig gestalteten inneren Heizleiter die Außenfläche des Mantels mit der Schmelze in Berührung steht, bei einem rohrförmig gestalteten Heizleiter jedoch dessen Rohrinnenfläche.The The invention relates to an electrically operated heating element, in particular hot runner nozzle, for Heating of molten material in a hot runner mold, in which the molten material can be fed to at least one mold cavity of an injection mold, this heating element consists of a central, cylindrical heating conductor which is electrically isolated from a tubular jacket, being at a rod-shaped designed inner heating conductor, the outer surface of the shell with the melt in touch stands, with a tubular designed heating element, however, the pipe inner surface.
Derartige Heizleiter bilden einen Stromkreis, in dem eines der beiden das Heizelement bildenden Bauteile geteilt ist und an den freien geteilten Enden Stromeinspeisungskontakte ausgebildet sind.such Heating conductors form a circuit in which one of the two Heating element forming parts is divided and divided on the free End Stromeinspeisungskontakte are formed.
Die beiden das Heizelement bildenden Bauteile müssen an ihren benachbarten Enden zur Bildung des besagten Stromkreises elektrisch leitend miteinander verbunden werden. Dieses geschieht in der Regel durch eine stoffschlüssige Verbindung, insbesondere Schweißverbindung. Diese Verbindung ist geeignet, die hohen mechanischen Kräfte, die u.a. durch die Längenausdehnung des oft mehr als 300°C erhitzten Heizelementes gegenüber den kühlen, benachbarten Bauelementen aufzunehmen und die hohen Ströme von teilweise über 100 A zu leiten.The both components forming the heating element must be adjacent to each other Ends to form the said circuit electrically conductive with each other get connected. This is usually done by a cohesive connection, in particular welded connection. This compound is suitable for high mechanical forces et al by the length extension often heated to more than 300 ° C Heating element opposite the cool, adjacent components and the high currents of more than 100 A to lead.
Dadurch, dass mindestens eines der das Heizelement bildenden Bauteile wegen des benötigten hohen spezifischen Widerstandes aus Chrom-Nickelstahl besteht, entsteht jedoch die Schwierigkeit, dass sich durch die bisher verwendeten stoffschlüssigen Verbindungen, z.B. Schweißverbindungen im Bereich der Schweißstelle Grobkorn bildet.Thereby, that at least one of the heating element forming components because of the needed high resistivity of chromium-nickel steel is formed However, the difficulty that is due to the previously used cohesive Compounds, e.g. welds in the area of the weld Coarse grain forms.
Somit wird dieser Bereich thermisch geschädigt und kann den mechanischen Anforderungen im Dauerbetrieb nicht gerecht werden.Consequently This area is thermally damaged and can damage the mechanical Requirements in continuous operation do not do justice.
Aus
der
Am gegenüberliegenden Ende verjüngt sich dieses Metallrohr zu einer Spitze, in deren Bereich Durchströmöffnungen vorgesehen sind, von denen aus die Kunststoffschmelze durch Ausströmöffnungen des Heizelementes in eine Vorkammer gelangt und von dort durch eine Düsenöffnung ausströmt.At the opposite End rejuvenated this metal tube to a tip, in the region of flow openings are provided, from which the plastic melt through outflow of the heating element passes into an antechamber and from there through a Nozzle opening flows out.
Das Metallrohr ist im Bereich der Spitze mit einem Außenmantel verschweißt. Zwischen dem Metallrohr und dem Außenmantel ist noch eine Isolierschicht vorgesehen. Das Heizelement ist auch noch im Bereich der Einströmöffnung mit einem weiteren Mantelteil versehen, welches im Bereich der Einströmöffnung mit dem Metallrohr verschweißt ist. Durch dieses Mantelteil erfolgt über eine Anschlussscheibe und einen Steckkontakt die Stromzuführung zu dem Metallrohr. Die Anschlussscheibe und der Steckkontakt stehen dabei quer zum Metallrohr. Die Anschlussscheibe ist zwischen zwei Isolierscheiben in einem Gehäuseoberteil gelagert.The Metal tube is in the area of the tip with an outer sheath welded. Between the metal tube and the outer jacket is still an insulating layer intended. The heating element is also still in the region of the inflow opening provided with a further jacket part, which in the region of the inflow opening with welded to the metal tube is. Through this jacket part via a connection plate and a plug contact the power supply to the metal tube. The connection plate and the plug contact stand while transverse to the metal tube. The connection disk is between two Insulating disks in a housing upper part stored.
Auch bei diesem vorbekannten Heizelement bildet sich im Bereich der Schweißverbindung Grobkorn, so dass auch dieser Bereich thermisch geschädigt ist und den mechanischen Anforderungen im Dauerbetrieb nicht gerecht wird.Also In this prior art heating element forms in the region of the welded joint Coarse grain, so that this area is thermally damaged and the mechanical requirements in continuous operation is not fair becomes.
Der Erfindung liegt deshalb die Aufgabe zugrunde, die geschilderten Nachteile zu beseitigen.Of the The invention is therefore based on the object, the described To eliminate disadvantages.
Dies wird nach der Erfindung dadurch erreicht, dass die das Heizelement bildenden Bauteile im Bereich ihrer freien Enden durch eine Pressverbindung elektrisch leitend miteinander verbunden sind.This is achieved according to the invention characterized in that the heating element forming components in the region of their free ends by a press connection electrically conductively connected to each other.
Die Erfindung wird nachfolgend am Beispiel einer Heißkanaldüse beschrieben, ohne dass sich der Anwendungsbereich hierauf beschränkt.The Invention will be described below using the example of a hot runner nozzle without the Scope limited to this.
In
Der
Außenmantel
Über die
Anschlussverbindung
About the connection
An den Enden der Heißkanaldüse sind Endkappen montiert, auf die ebenfalls noch eingegangen wird.At the ends of the hot runner nozzle are Mounted end caps, which will also be discussed.
Aus
der
Als
Material für
die Buchsen
Des
weiteren ist Nickel weitgehend korrosionsbeständig. Dadurch, dass sich die
Nickelbuchsen
Im Rahmen der Erfindung muss der Außenmantel der Buchsen nicht zylindrisch ausgebildet sein.in the Under the invention, the outer jacket of the sockets must not be cylindrical.
Ein
Ausführungsbeispiel
gemäß
Es
hat sich als besonders vorteilhaft erwiesen, wenn die Stirnseiten
der Außenmäntel
In
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1999136584 DE19936584B4 (en) | 1999-08-03 | 1999-08-03 | Electrically operated heating element |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1999136584 DE19936584B4 (en) | 1999-08-03 | 1999-08-03 | Electrically operated heating element |
Publications (2)
Publication Number | Publication Date |
---|---|
DE19936584A1 DE19936584A1 (en) | 2001-02-08 |
DE19936584B4 true DE19936584B4 (en) | 2007-09-27 |
Family
ID=7917081
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1999136584 Expired - Fee Related DE19936584B4 (en) | 1999-08-03 | 1999-08-03 | Electrically operated heating element |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19936584B4 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10123314C1 (en) * | 2001-05-14 | 2002-07-11 | Sfr Formenbau Gmbh | Injection head for injecting molten plastic into mold, contains core with central melt channel of beryllium or beryllium alloy, protective cap made from corrosion-resistant material being mounted between rear end of core and casing |
US7342206B2 (en) | 2004-01-06 | 2008-03-11 | Watlow Electric Manufacturing Company | Tailored heat transfer layered heater system |
DE202017100786U1 (en) * | 2017-02-14 | 2017-03-02 | Türk & Hillinger GmbH | Cartridge Heater |
CN109986047B (en) * | 2018-01-02 | 2021-05-04 | Ykk株式会社 | Die casting device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3335279A1 (en) * | 1983-09-29 | 1985-04-18 | EWIKON Entwicklung und Konstruktion GmbH & Co KG, 4900 Herford | ELECTRICALLY OPERATED HEATING ELEMENT WITH A FLOW CHANNEL FOR A PLASTIC MELT |
-
1999
- 1999-08-03 DE DE1999136584 patent/DE19936584B4/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3335279A1 (en) * | 1983-09-29 | 1985-04-18 | EWIKON Entwicklung und Konstruktion GmbH & Co KG, 4900 Herford | ELECTRICALLY OPERATED HEATING ELEMENT WITH A FLOW CHANNEL FOR A PLASTIC MELT |
Also Published As
Publication number | Publication date |
---|---|
DE19936584A1 (en) | 2001-02-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8139 | Disposal/non-payment of the annual fee | ||
8110 | Request for examination paragraph 44 | ||
8170 | Reinstatement of the former position | ||
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: CORNAU, GERHARD, 35108 ALLENDORF, DE |
|
8320 | Willingness to grant licenses declared (paragraph 23) | ||
R082 | Change of representative |
Representative=s name: PATENTANWAELTE OLBRICHT, BUCHHOLD, KEULERTZ PA, DE |
|
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20130301 |