EP2012995A1 - Heisskanaldüse - Google Patents

Heisskanaldüse

Info

Publication number
EP2012995A1
EP2012995A1 EP07723817A EP07723817A EP2012995A1 EP 2012995 A1 EP2012995 A1 EP 2012995A1 EP 07723817 A EP07723817 A EP 07723817A EP 07723817 A EP07723817 A EP 07723817A EP 2012995 A1 EP2012995 A1 EP 2012995A1
Authority
EP
European Patent Office
Prior art keywords
hot runner
runner nozzle
temperature sensor
sleeve
nozzle according
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Withdrawn
Application number
EP07723817A
Other languages
German (de)
English (en)
French (fr)
Inventor
Herbert Günther
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guenther Heisskanaltechnik GmbH
Original Assignee
Guenther Heisskanaltechnik GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guenther Heisskanaltechnik GmbH filed Critical Guenther Heisskanaltechnik GmbH
Publication of EP2012995A1 publication Critical patent/EP2012995A1/de
Withdrawn legal-status Critical Current

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
    • 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
    • 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
    • B29C45/1782—Mounting or clamping means for heating elements or thermocouples
    • 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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/16—Special arrangements for conducting heat from the object to the sensitive element
    • 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
    • B29C2045/274—Thermocouples or heat sensors
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76003—Measured parameter
    • B29C2945/7604—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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76177—Location of measurement
    • B29C2945/76254—Mould
    • B29C2945/76274—Mould runners, nozzles
    • B29C2945/76277—Mould runners, nozzles nozzles
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76451—Measurement means
    • B29C2945/76454—Electrical, e.g. thermocouples

Definitions

  • the invention relates to a hot runner nozzle for an injection mold according to the preamble of claim 1.
  • Hot runner nozzles are used in injection molds to produce a flowable mass, e.g. a plastic melt to supply at a predetermined temperature under high pressure a separable mold insert. They usually have a material tube with a flow channel that ends in a nozzle orifice. The latter forms on the end a nozzle outlet opening, which opens via a gate in the mold insert (mold cavity). So that the flowable mass does not cool prematurely within the material tube, a heater is provided, which has to ensure a uniform as possible temperature distribution into the nozzle mouthpiece. Thermal separation between the hot nozzle and the cold tool prevents the nozzle from freezing and heating the tool or mold insert.
  • the requirements for the temperature control in a hot runner nozzle are very high, because the plastics to be processed often have a very narrow processing window and are extremely sensitive to temperature fluctuations. For example, a temperature change of only a few degrees can already lead to spray defects and rejects. Precise temperature control is therefore important for a well-functioning and fully automatic hot runner tool. In addition, it is important that for multiple tools with eg 24, 32 or 64 cavities the temperature to be set is the same for all mold cavities. This requires that the set Temperature must match very closely with the actual temperature in the nozzle.
  • Temperature sensors are usually used to monitor and control the temperature. These are - as disclosed for example in EP-A1-0 927 617 or DE-U-201 00 840 - introduced as separate elements in grooves or holes, which are provided in the nozzle body or in the heater. The problem, however, is that even a slight change in position of the temperature sensor can lead to significant measurement errors, which has an unfavorable effect on the reproducibility of the temperatures.
  • the aim of the invention is to avoid these and other disadvantages of the prior art and to provide a hot runner nozzle whose temperature is accurately measurable and controllable.
  • the aim is also a permanently reliable and precise determinability of the temperature, in particular in the end region of the material tube.
  • the nozzle should overall be simple and inexpensive to implement.
  • a hot runner nozzle for an injection mold with a material tube in which at least one flow channel is formed for a flowable material, with a heater for the flowable material and with a temperature sensor arranged in the region of the heater, the invention provides that the temperature sensor on the material pipe is fixed. This ensures that the temperature of the nozzle and thus the temperature of the flowable material within the flow channel is always measured in the same place.
  • the entire hot runner system can thus be controlled precisely; The temperature can be kept exactly at the same level even with a variety of nozzles in a tool.
  • the temperature sensor is fixed in the end area of the material pipe. In this way, the temperature in the area of the nozzle tip or the nozzle tip is measured, ie where the greatest heat losses can occur.
  • the temperature sensor is provided at the end with a sleeve which is attached to the material pipe.
  • the temperature sensor is thus permanent reliably determined. Furthermore, the sensor end can no longer move relative to the material pipe or to the heater, which makes the process control safer.
  • the sleeve is pressed with the temperature sensor, soldered or glued. It advantageously consists of a good heat-conducting material, so that always optimal results are achieved.
  • the sleeve is a crimp sleeve and that it is welded, soldered or glued to the material tube. This results in a generally simple construction and the nozzle can be realized inexpensively.
  • the heater takes on the temperature sensor, wherein the measuring point is accessible from the outside.
  • the temperature sensor can be quickly and easily set on the material pipe. Contributes in particular to when the measuring point of the temperature sensor is in the region of a recess formed in the heater, wherein the temperature sensor is always securely fixed in the region of the recess on the outer circumference of the material tube.
  • Fig. 1 is a sectional view of a hot runner nozzle
  • FIG. 2 is an enlarged partial side view of the hot runner nozzle of FIG. 1.
  • the hot runner nozzle generally designated 10 in FIG. 1 is intended for use in an injection mold. It has a material tube 20 which is provided at its upper end with a flange-like connection head 22. This sits detachably in a housing 12 which can be fixed from below to a distributor plate (not shown). A radially formed step 13 centers the housing 12 and thus the nozzle 10 in the tool.
  • a flow channel 30 for a molten material is centrally introduced.
  • the preferably formed as a bore channel 30 has in the connection head 22, a material supply port 32 and opens at its lower end in a nozzle mouthpiece 34, which is formed for example as a nozzle tip.
  • the latter has a material outlet opening 35, so that the flowable material melt can get into a (not shown) mold cavity.
  • the nozzle mouthpiece 34 which is preferably made of highly heat-conductive material, is inserted on the end side into the material tube 20, preferably screwed in. But it can also - depending on the application - axially displaceably mounted with the same operation or be integral with the material tube 20.
  • a sealing ring 25 is provided in the connection head 22 of the material tube 20 concentrically with the material feed opening 32. Also conceivable is the formation of an additional (not shown) annular centering approach, which can facilitate the installation of the nozzle 10 on the tool.
  • a heater 40 is placed on the outer circumference 26 of the material tube 20, a heater 40 is placed.
  • This is formed by a sleeve 42 made of a highly thermally conductive material, such as copper or brass, which extends over almost the entire axial length of the material tube 20.
  • a sleeve 42 made of a highly thermally conductive material, such as copper or brass, which extends over almost the entire axial length of the material tube 20.
  • a (not shown) electrical heating coil formed whose (also not visible) connections are led out laterally from the housing 12.
  • the entire heater 40 is enclosed by a protective tube 43.
  • a temperature sensor 50 is provided, which is guided through the heater 40 through into the end portion 27 of the material tube 20.
  • the sleeve 42 of the heater 40 is provided for this purpose with a preferably parallel to the flow channel 30 extending bore 44 which receives the probe 50 (see Fig. 2).
  • the lower end 45 of the bore 44 terminates in a U-shaped recess 46 which is formed in the edge of the wall of the sleeve 42 and in the protective tube 43.
  • the total rod-shaped temperature sensor 50 ends with its tip forming an end 52 in the recess 46 of the sleeve 42 and is fixed there on the outer circumference 26 of the material tube 20.
  • the externally accessible free end 52 of the probe 50 contributes to a sleeve 54 made of a good heat-conducting material, such as a crimp sleeve, which is pressed firmly with the probe 50.
  • the crimping sleeve 54 is located within the recess 46 on the outer circumference 26 of the material tube 20 fastened, preferably by laser welding. The access required for this purpose is expediently carried out through the recess 46.
  • the position of the crimping sleeve 54 and thus the position of the temperature sensor 50 are thus accurately defined relative to the material tube 20, so that the temperature measurement is always carried out at one and the same point.
  • the sensor 50 can not move, so that the temperature detection is not affected.
  • the temperature at the outer end of the material tube 23 and thus in the region of the nozzle mouthpiece 34 can rather be permanently measured exactly, as a result of which the entire nozzle 10 can be precisely controlled.
  • the (not shown) terminals of the temperature sensor 50 are led out laterally from the housing 12 together with the connections for the heater 40.
  • the heater 40 may be integrated, for example, in the material pipe 20 or formed as a flat radiator.
  • the heating element used in the heater 40 may alternatively comprise one of a heating medium, e.g. Be water or oil, through-flow pipe piece, for example, if an electric heater is not desired or not feasible.
  • the invention is readily applicable to cold runner nozzles.
  • a hot runner nozzle 10 for an injection mold has a material tube 20 in which at least one flow channel 30 is formed for a flowable material.
  • a heater 40 for the flowable material in the region of a temperature sensor 50 is arranged. This is fixed to the outer circumference 26 of the material tube 20, in particular with its one Meßspitze or a measuring point forming end 52.
  • the measuring point of the temperature sensor 50 in the end portion 27 of the material tube and in the region of a formed in the heater 40 recess 40.
  • the temperature sensor 50 end provided with a sleeve 54, in particular pressed, which is fixed to the material pipe 20.
  • the sleeve 54 consists of a good heat-conducting material and is preferably a crimp sleeve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
EP07723817A 2006-04-21 2007-03-30 Heisskanaldüse Withdrawn EP2012995A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202006006671U DE202006006671U1 (de) 2006-04-21 2006-04-21 Heißkanaldüse
PCT/EP2007/002875 WO2007121823A1 (de) 2006-04-21 2007-03-30 Heisskanaldüse

Publications (1)

Publication Number Publication Date
EP2012995A1 true EP2012995A1 (de) 2009-01-14

Family

ID=38169546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07723817A Withdrawn EP2012995A1 (de) 2006-04-21 2007-03-30 Heisskanaldüse

Country Status (11)

Country Link
US (1) US20090311359A1 (zh)
EP (1) EP2012995A1 (zh)
JP (1) JP2009534211A (zh)
KR (1) KR20090008378A (zh)
CN (1) CN101426633A (zh)
BR (1) BRPI0709455A2 (zh)
CA (1) CA2649202A1 (zh)
DE (1) DE202006006671U1 (zh)
MX (1) MX2008012680A (zh)
TW (1) TW200800562A (zh)
WO (1) WO2007121823A1 (zh)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1938945B1 (en) * 2006-12-29 2012-02-08 Mold-Masters (2007) Limited Edge gate injection molding apparatus
DE202008013626U1 (de) * 2008-10-15 2009-02-19 Türk & Hillinger GmbH Rohrförmiges Heizelement mit Temperaturfühler
DE102008055640A1 (de) 2008-11-03 2010-05-06 Günther Heisskanaltechnik Gmbh Heißkanaldüse
JP5800660B2 (ja) * 2011-10-05 2015-10-28 株式会社ニフコ バッテリー用温度センサーの取付用クリップ
US9144930B2 (en) 2013-04-09 2015-09-29 Otto Männer Innovation GmbH Heater and thermocouple assembly
KR101508118B1 (ko) * 2014-09-01 2015-04-08 주식회사 톱텍 레진 슬릿 코팅장치 및 이를 이용한 레진 슬릿 코팅방법
CN109315884B (zh) * 2018-11-15 2020-09-04 浙江天宏鞋业有限公司 一种防胶丝黏连的制鞋加工用涂胶装置
DE102021117549A1 (de) * 2021-07-07 2023-01-12 Meusburger Deutschland Gmbh Anordnung zum einspritzen von kunststoff in eine kavität einer kunststoffspritzmaschine
CN115958761B (zh) * 2022-12-16 2023-11-07 苏州博莱斯精密机械有限公司 一种基于物联网智能温控技术的热流道装置及其温控方法

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Publication number Priority date Publication date Assignee Title
GB1077876A (en) * 1965-02-03 1967-08-02 Mullard Ltd Method and apparatus for mounting thermocouples
JPS6071924A (ja) * 1983-09-29 1985-04-23 Hitachi Zosen C B I Kk 熱電対の取付方法
EP0326016A3 (en) * 1988-01-25 1991-01-30 Husky Injection Molding Systems Ltd. Hot runner nozzle
US5360333A (en) * 1992-09-30 1994-11-01 Husky Injection Molding Systems Ltd. Band heater clamp arrangement for an injection molding machine
CA2088228C (en) * 1993-01-27 2000-07-04 Jobst Ulrich Gellert Injection molding nozzle with thermocouple tube
JPH0788894A (ja) * 1993-09-22 1995-04-04 Fanuc Ltd 射出成形機用ノズル
US5326251A (en) * 1993-12-06 1994-07-05 Gellert Jobst U Heated injection molding nozzle with alternate thermocouple bores
DE69708935T2 (de) * 1997-12-19 2002-04-18 Guenther Gmbh & Co Kg Metallve Heisskanaldüse
JP2000055744A (ja) * 1998-08-07 2000-02-25 Matsushita Electric Ind Co Ltd サーミスタ温度センサ
CA2358187A1 (en) * 2001-10-03 2003-04-03 Mold-Masters Limited Nozzle seal
ITTO20040240A1 (it) * 2004-04-20 2004-07-20 Piero Enrietti Gruppo ugello riscaldato per lo stampaggio di materiali plastici

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007121823A1 *

Also Published As

Publication number Publication date
US20090311359A1 (en) 2009-12-17
KR20090008378A (ko) 2009-01-21
DE202006006671U1 (de) 2007-09-06
JP2009534211A (ja) 2009-09-24
BRPI0709455A2 (pt) 2011-07-12
CA2649202A1 (en) 2007-11-01
TW200800562A (en) 2008-01-01
WO2007121823A1 (de) 2007-11-01
MX2008012680A (es) 2008-10-15
CN101426633A (zh) 2009-05-06

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