EP1719386A1 - Elektrischer heizkörper in form eines verdichteten heizelementes mit dauerhaften federeigenschaften - Google Patents
Elektrischer heizkörper in form eines verdichteten heizelementes mit dauerhaften federeigenschaftenInfo
- Publication number
- EP1719386A1 EP1719386A1 EP05707400A EP05707400A EP1719386A1 EP 1719386 A1 EP1719386 A1 EP 1719386A1 EP 05707400 A EP05707400 A EP 05707400A EP 05707400 A EP05707400 A EP 05707400A EP 1719386 A1 EP1719386 A1 EP 1719386A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- range
- approximately
- metallic
- jacket
- mgo
- 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.)
- Granted
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 54
- 239000000463 material Substances 0.000 claims abstract description 47
- 239000000919 ceramic Substances 0.000 claims abstract description 23
- 239000004020 conductor Substances 0.000 claims abstract description 13
- 238000001746 injection moulding Methods 0.000 claims abstract description 9
- 238000005485 electric heating Methods 0.000 claims abstract description 8
- 238000004512 die casting Methods 0.000 claims abstract description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 20
- 239000000956 alloy Substances 0.000 claims description 20
- 239000000843 powder Substances 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 8
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 7
- BIJOYKCOMBZXAE-UHFFFAOYSA-N chromium iron nickel Chemical compound [Cr].[Fe].[Ni] BIJOYKCOMBZXAE-UHFFFAOYSA-N 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000000243 solution Substances 0.000 claims description 5
- 238000000137 annealing Methods 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 12
- 229910052759 nickel Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 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
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C3/00—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids
- H01C3/14—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids the resistive element being formed in two or more coils or loops continuously wound as a spiral, helical or toroidal winding
-
- 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
- H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
-
- 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
- H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
- H05B3/52—Apparatus or processes for filling or compressing insulating material in tubes
Definitions
- the invention relates to an electric heater in the form of a compressed heating element which heats cylindrical components from the outside, preferably in the form of a spiral tube cartridge on the spray nozzle of injection molding or die casting tools or the like, heated cylindrical components, consisting of a metallic jacket in which an MgO ceramic is arranged , is embedded in the one heating conductor spiral.
- the heating of nozzles in the hot runner technology in plastic injection molding machines as well as in the zinc die casting industry is carried out by compressed electrical heating elements which are close to the nozzles. These heating elements are wound, the inside diameter of the wound heating element, a spiral tube cartridge, being smaller than the outside diameter of the nozzle.
- the inner diameter of the spiral tube cartridge is, for example, about 0.15 mm smaller than the nozzle with a nozzle diameter of 20 mm.
- the wound heating element can then be pushed tightly onto the nozzle by a rotary movement.
- the aim is for the heating element to be firmly attached to the outer surface of the nozzle in order to transmit maximum heating power and to create an exact constant temperature control.
- the known heating elements are preferably made of ductile stainless steel or of nickel as a tubular jacket.
- the material must have a high elongation at break during the production of the heating elements, since it deforms very mechanically becomes.
- nickel-based alloys are used.
- the materials mentioned have low heat resistance, especially if these higher temperatures up to 500 ° C are permanently exposed.
- the tube jacket loses its spring force due to heating and cooling over a long period of time.
- the heating element lifts off the nozzle, which means that good heat transfer is no longer guaranteed.
- a large number of additional clamping devices were developed with the aim of holding the heating element firmly on the nozzle.
- Such a tensioning element necessary for proper functioning is known for example from DE 37 36 612 C2.
- the problem with this device is that it protrudes beyond the circumference of the helical tube cartridge, which is circular in cross section, so that there is an additional space requirement for this projecting fastening device.
- the installation space is so narrow that projecting parts cannot be accommodated or can only be accommodated with difficulty. There is therefore a need to create a heating element that requires less space and can be permanently attached to the nozzle without additional clamping elements.
- the invention has for its object to provide an electric radiator in the form of a compressed heating element that heats cylindrical components from the outside, preferably in the form of a spiral tube cartridge on the spray nozzle of injection molding or die casting tools or similar heatable cylindrical components , which can be fixed on a cylindrical heatable object, without additional clamping elements and especially at temperatures around 500 ° C its strength and clamping effect permanently, ie at least 10,000 hours.
- an electric radiator in the form of a compressed heating element, the cylindrical components heated from the outside, preferably in the form of a helical tube cartridge on the spray nozzle of injection molding or die casting tools or the like heated cylindrical components, consisting of a metallic shell in which an MgO ceramic is arranged, in the one
- Heating conductor spiral is embedded, the material of the metallic sheath having a tensile strength Rm at 500 ° C of> 650 N / mm 2 and an elastic limit R p02 at 500 ° C, which is approximately the same size, in order to achieve a permanent radial pressure of the Spiral tube cartridge on the component to be heated due to its spring properties.
- the material of the metallic shell has a tensile strength Rm at 500 ° C, which is between 10% to 20% greater than the yield strength R p0> 2 at 500 ° C.
- the material of the metallic jacket has a tensile strength Rm at 500 ° C, which is at most 30% greater than the yield strength R p02 at 500 ° C.
- the metallic jacket has a tensile strength Rm at 20 ° C. of> 900 N / mm 2 .
- the material of the metallic shell has an elastic limit R p0 ⁇ 2 at 20 ° C of> 850 N / mm 2 .
- the material of the metallic shell has an elongation at break of ⁇ 20% after hardening and an elongation at break of> 30% before hardening.
- the material which is in the form of a tubular jacket, must have a high elongation at break during manufacture of the heating element and before hardening, since it must be deformed very mechanically.
- the material of the metallic shell has a tensile strength Rm at 500 ° C. after 10,000 hours of> 400 N / mm 2 .
- the material of the metallic jacket has a thermal expansion at 400 ° C of ⁇ 17 x 10 ⁇ 6 K _1 .
- the material of the metallic jacket is resistant to scaling.
- the material of the metallic shell is a precipitation hardenable nickel-chromium-iron alloy.
- the material of the metallic shell is a precipitation-hardenable nickel-chromium-iron alloy, comprising proportions of Ni in a range from approximately 50.0% to 55.0%, and Cr in a range of approximately 17.0% to 21.0%, of C in a range of approximately 0.02% to 0.08%, Mn in a range of approximately 0% to 0.35%, Si in a range of approximately 0% to 0.35%, Cu in a range of approximately 0% to 0.20%, Mo in a range of approximately 2.80% to 3.30%, Co in a range of approximately 0% to 1.0%, Nb in a range from approximately 4.80% to 5.50%, Al in a range from approximately 0.30% to 0.70%, Ti in a range from approximately 0.70% to 1.15%, B in one Range from about 0.002% to 0.006%, P in a range from about 0% to
- the electrical heating element is wound into a spiral tube cartridge, the inner diameter of the spiral tube rone is approximately between 0.5% to 5% smaller than the outer diameter of the cylindrical component to be heated.
- the MgO ceramic has at least one bore for a heating conductor spiral, MgO powder being introduced into the intermediate space between the metallic jacket and the MgO ceramic and into cavities in the MgO ceramic.
- the MgO ceramic has at least one bore for a thermocouple.
- Another advantageous embodiment of the invention is a method for producing an electric radiator whereby a heating conductor spiral is contacted with a connecting wire and drawn into the MgO ceramic, the MgO ceramic is inserted with wire into the jacket tube, the cavities with MgO insulating powder under vibration be filled, the cross-section of the heating element is reduced by about 10 - 20%, the jacket tube is tapped to expose the connections, solution annealing is then carried out under a protective gas atmosphere, the heated zone is wound to an inner diameter that is smaller than the outer diameter of the heating cylindrical component, after winding, the spiral tube cartridge is calibrated to the exact final dimension by means of a press mandrel, with the MgO powder being recompacted, the curing then taking place at about 720 ° C. for 8 hours, the electric heating element being set at 620 ° C within Cooled for 2 hours and opened over 8 hours
- heating elements with two-sided connection there are also heating elements with one-sided connection.
- the casing tube is then closed on one side with a base plate after the MgO ceramic has been inserted into it. Who turns The closing process is identical to the production of a heating element with a two-sided connection.
- the hardened, unheated zone is annealed again, preferably solution annealing by means of a gas burner, and is thus made flexible again.
- the unheated zone of the helical tube cartridge is provided with insulation before hardening, so that the unheated zone in the hardening furnace is not subject to the hardening temperature, so that the unheated zone is still bendable after hardening.
- the electric heating element according to the invention enables permanent radial pressing of the electric heating element in the form of the helical tube cartridge onto the spray nozzle of the injection molding tool for temperatures up to over 500 ° C.
- This permanent pressing which does not require the known complex constructive clamping mechanisms among other things due to the insignificant decrease in the spring stiffness of the metallic jacket at high temperatures around 500 ° C and a long period of 10,000 to 100,000 hours.
- Clamping elements are avoided due to the lack of a complex, large clamping mechanism.
- the electric heating element according to the invention has a vibration and shock-proof contact, since there are no screws which could loosen due to vibrations existing in the machine.
- Another advantage of the material used is that it has a high resistance to corrosion and is resistant to scaling.
- the electric radiators in the form of spiral tube cartridges are preferably made of ductile stainless steel or of nickel, these materials having only low heat resistance, especially if they are permanently exposed to higher temperatures of about 400 ° C.
- the tube jacket loses its spring force due to heating and cooling over a long period of time. The result is an increase in the inside diameter of the spiral tube cartridge.
- the helical tube cartridge no longer lies completely against the spray nozzle, so that good heat transfer from the helical tube cartridge to the injection molding nozzle is no longer guaranteed. Accordingly, the efficiency of the heating also drops, so that a constant, reproducible temperature control is not guaranteed.
- the thermal coupling of the spiral tube cartridge with the spray nozzle is disturbed.
- the power consumed by the nozzle drops and the radiation losses of the spiral tube cartridge increase.
- the electric heater according to the invention does not have these disadvantages because of its spring properties, even at high temperatures of around 500.degree.
- Sheath are provided, this has a low mass, so that there are very fast thermal reactions for accurate temperature control.
- the tube wall thickness of the metallic jacket can be chosen to be thinner, so that the heating element can be smaller.
- Another advantage is that the electric heater is firmly seated on the cylindrical component to be heated in the cold and warm state. due to the approximately 0.5% to 5% smaller inner diameter of the spiral tube cartridge in the unassembled state compared to the outer diameter of the cylindrical component to be heated, the permanent spring pressure being ensured due to the spring properties.
- FIG. 1 shows an electric radiator in the form of a compressed heating element, in the form of a coiled tube,
- Fig. 3 shows a section through the structure of the heating element
- FIG. 4 shows a section through the heating element according to line A-A in FIG. 3,
- the inside diameter d WI of the spiral tube cartridge 1 in the unmounted state is approximately between 0.5 to 5% smaller than the outside diameter d BA of the electrical component to be heated.
- the jacket tube 2 of the helical tube cartridge 1 is formed from a material that also springs at temperatures of around 500 C, due to the smaller inner diameter of the helical tube cartridge 2, the latter is firmly clamped to the cylindrical component to be heated without further clamping means due to the resilient properties.
- the spring action of the spiral tube cartridge 1 wound from the jacket tube 2 is sufficient to automatically release the to prevent the same from vibrations.
- the spiral tube cartridge 1 has a heated zone 3 and an unheated zone 4 which merges into the connection head 5. Usual inner diameters of the spiral tube cartridge 1 are between 6 and 60 mm.
- Fig. 3 shows a section through the structure of the heating element with a one-sided connection in the state not yet wound to the spiral tube cartridge 1.
- the heating conductor spiral 6 is contacted with thicker connecting wires 7.
- the heating conductor spiral 6 with connection wire 7 is drawn into the ceramic molded parts 8.
- the ceramic molded part 8 with connecting wire 7 is inserted into the matching jacket tube 9.
- the casing tube 9 is closed on one side with a closure element 10.
- the cavities may be filled with MgO insulating powder under vibration.
- the cross section of heating element 1 is then reduced by approximately 10-20%.
- the goal is to produce good heat transfer from the heating conductor spiral 6 to the jacket tube 9 by pressing the MgO and at the same time to increase the high voltage strength. This results in strain hardening of the jacket tube 9.
- the jacket tube 9 extends in the longitudinal direction by about 10%. Only materials with a high elongation at break can be used here. This is followed by parting the jacket tube 9, the connecting wires 7, which are passed through the unheated zone 4, having to be exposed for the connection of the stranded wire. This is done, for example, by parting off on a lathe. Solution annealing then takes place in a protective gas atmosphere, so that the casing tube 9 can be deformed and wound again.
- the helical tube cartridge 1 is usually wound in the heated zone 3 to a smaller inner diameter with a smaller mandrel than the cylinder to be heated later. After winding, the spiral tube cartridge 1 is brought to the exact final dimension by means of a press mandrel. At the same time, the MgO mass is subsequently compressed carried out. Curing to achieve the permanent spring effect takes place at approx. 720 ° C for 8 hours. The electric radiator is then cooled to 620 ° C within 2 hours and kept at 620 ° C over 8 hours. Finally, the electrical connection is made.
- an MgO ceramic 8 is arranged, which has two bores 10 for receiving the heating conductor spiral 6 and two smaller bores 11 for Recording a thermo wire / thermocouple 12.
- a space 13 possibly existing between the jacket tube 9 and the MgO ceramic 8 and the cavities in the MgO ceramic are filled with MgO powder 14.
- a particularly suitable material for the metallic jacket tube of the hardened heating element is characterized in that the tensile strength Rm at 20 ° C. is> 900 N / mm 2 .
- the proof stress R p0 / 2 should be> 850 N / mm 2 at 20 ° C.
- the elongation at break of the heating element should be ⁇ 20%.
- the tensile strength Rm at 500 ° C should be> 650 N / mm 2 .
- the tensile strength Rm at 500 ° C after 10,000 hours should still be> 400 N / mm 2 .
- the thermal expansion at 400 ° C should be ⁇ 17 x 10 ⁇ 6 K _1 .
- the material should also be scale-resistant and corrosion-resistant.
- the material of the metallic jacket tube should have a tensile strength Rm at 500 ° C of> 650 N / mm 2 and an elastic limit R p02 at 500 ° C, which are approximately the same size.
- the material of the metallic jacket tube should preferably have a tensile strength Rm which is at most 30% greater than the yield strength R p0.2 ' at 500 ° C.
- a particularly suitable material is, for example, a precipitation-hardenable nickel-chromium-iron alloy.
- a precipitation hardenable nickel-chromium-iron alloy comprises proportions of Ni in a range from about 50.0% to 55.0% of Cr in a range from about 17.0% to 21.0% and the rest is formed by Fe, based on the total alloy.
- the nickel-chromium-iron alloy can additionally comprise proportions of C in a range from approximately 0.02% to 0.08%, Mn in a range from approximately 0% to 0.35%, Si in a range from approximately 0% to 0.35%, Cu in a range of approximately 0% to 0.20%, Mo in a range of approximately 2.80% to 3.30%, Co in a range of approximately 0% to 1.0%, Nb in a range from approximately 4.80% to 5.50%, Al in a range from approximately 0.30% to 0.70%, Ti in a range from approximately 0.70% to 1.15%, B in one Range from about 0.002% to 0.006%, P in a range from about 0% to 0.0015%, S in a range from about 0% to 0.010% based on the total alloy.
- a particularly suitable material is, for example, INCONELL alloy 718 (German material standard number: 2.4668). Also suitable are INCONELL alloy X-750 (German material standard number: 2.4669),, INCONELL alloy 751 (German material standard number: 2.2494), INCONELL alloy A-286 (German material standard number: 1.4980), INCONELL alloy 80A (German material standard number: 2.4631 and 2.4952), INCONELL alloy 90 (German material standard number: 2.4632 and 2.4969), INCONELL alloy 101, INCONELL alloy 105 (German material standard number: 2.4634), INCONELL alloy 115 (German material standard number: 2.4636), INCONELL alloy 263 (German material standard number:
- INCONELL alloy PE 16 InCONELL alloy D 979.
- highly heat-resistant nickel-based alloys such as INCONELL alloy 601H (German material standard number: 2.4851) and INCONELL alloy 800H (German material standard number: 1.4876).
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Resistance Heating (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200410007542 DE102004007542B4 (de) | 2004-02-15 | 2004-02-15 | Elektrischer Heizkörper in Form eines verdichteten Heizelementes mit dauerhaften Federeigenschaften |
PCT/EP2005/001512 WO2005079115A1 (de) | 2004-02-15 | 2005-02-15 | Elektrischer heizkörper in form eines verdichteten heizelementes mit dauerhaften federeigenschaften |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1719386A1 true EP1719386A1 (de) | 2006-11-08 |
EP1719386B1 EP1719386B1 (de) | 2013-07-31 |
Family
ID=34853487
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05707400.7A Not-in-force EP1719386B1 (de) | 2004-02-15 | 2005-02-15 | Elektrischer heizkörper in form eines verdichteten heizelementes mit dauerhaften federeigenschaften |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1719386B1 (de) |
DE (1) | DE102004007542B4 (de) |
WO (1) | WO2005079115A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011082238A1 (en) * | 2009-12-29 | 2011-07-07 | Synventive Molding Solutions, Inc. | Heating apparatus for fluid flow channel |
DE202019104902U1 (de) | 2019-09-05 | 2019-09-16 | Hotset Gmbh | Elektrisches Heizelement |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA937426A (en) * | 1970-02-16 | 1973-11-27 | G. Fletcher Stewart | Production of superalloys |
DE3001017A1 (de) * | 1980-01-12 | 1981-07-16 | Heinz 7203 Fridingen Stegmeier | Heisskanalduese fuer eine spritzgussmaschine |
DE8714384U1 (de) * | 1987-10-29 | 1988-01-14 | Hotset Corp., Battle Creck, Mich., Us | |
DE10124960A1 (de) * | 2001-05-21 | 2002-11-28 | Watlow Gmbh | Heizelement |
-
2004
- 2004-02-15 DE DE200410007542 patent/DE102004007542B4/de not_active Expired - Fee Related
-
2005
- 2005-02-15 WO PCT/EP2005/001512 patent/WO2005079115A1/de active Application Filing
- 2005-02-15 EP EP05707400.7A patent/EP1719386B1/de not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2005079115A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102004007542B4 (de) | 2007-03-22 |
DE102004007542A1 (de) | 2005-09-15 |
EP1719386B1 (de) | 2013-07-31 |
WO2005079115A1 (de) | 2005-08-25 |
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DE19813251C2 (de) | Widerstandsheizvorrichtung |
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