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WO2006005210A1 - Capteur de pression interne de moule et disposition de montage - Google Patents

Capteur de pression interne de moule et disposition de montage Download PDF

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Publication number
WO2006005210A1
WO2006005210A1 PCT/CH2005/000387 CH2005000387W WO2006005210A1 WO 2006005210 A1 WO2006005210 A1 WO 2006005210A1 CH 2005000387 W CH2005000387 W CH 2005000387W WO 2006005210 A1 WO2006005210 A1 WO 2006005210A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
plate
tool plate
cable
tool
Prior art date
Application number
PCT/CH2005/000387
Other languages
German (de)
English (en)
Inventor
Paul Engeler
Original Assignee
Kistler Holding Ag
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 Kistler Holding Ag filed Critical Kistler Holding Ag
Priority to EP05754090A priority Critical patent/EP1765571A1/fr
Publication of WO2006005210A1 publication Critical patent/WO2006005210A1/fr

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
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding 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
    • B29C45/2673—Moulds with exchangeable mould parts, e.g. cassette moulds
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/0007—Fluidic connecting means
    • 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
    • B29C2945/76006—Pressure
    • 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
    • B29C2945/76257—Mould cavity
    • B29C2945/7626—Mould cavity cavity walls
    • 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
    • B29C2945/76458—Electrical, e.g. thermocouples piezoelectric

Definitions

  • the invention relates to an in-mold pressure sensor for measuring tool internal pressures in injection molding, wherein the sensor can be connected to a plug with a cable or connected, and a mounting arrangement for Mes ⁇ sen of internal cavity pressures during injection molding comprising at least one tool plate and a cavity plate and a cavity pressure sensor and a plug attached to the sensor by a cable.
  • In-mold pressure sensors in particular piezoelectric mold pressure sensors, have been known for over 30 years. They work according to the principle described in CH 573593 and have no membrane. They were developed primarily for use in the injection molding process in order to determine the in-mold pressure during injection molding in a cavity of an injection molding tool, thereby improving process control. Such sensors are constructed so that on one side is the pressure-sensitive surface and opposite the cable outlet.
  • a conventional injection-molding tool comprises a plurality of plates stacked on top of one another, wherein the uppermost plate is the tool plate.
  • On this tool plate is, for example, a holding plate with one or more Ausspa ⁇ ments, in which there are Kavticiansplatten.
  • the cavities of these cavity plates are injection molded with
  • a membrane pressure sensor is mounted on the cavity plate such that the pressure-sensitive surface of the sensor is flush with the inner wall of the cavity plate.
  • This ' usually serves a thread in the front region of the sensor, ie in the vicinity of the pressure-sensitive point.
  • a cable connected to the sensor extends further into the tool plate and ends at a plug which is arranged on this plate. Installation is carried out by a toolmaker while maintaining very low tolerances.
  • Object of the present invention is to provide a Formin ⁇ nendrucksensor and a mounting arrangement, which a removal and insertion of the cavity plate ermögli ⁇ chen, without causing the risk to damage the cable be ⁇ .
  • an in-mold pressure sensor according to the invention for measuring tool internal pressures during injection molding is installed in the same plate of an injection molding tool, in which the plug is also installed, which is connected to the sensor by a cable.
  • This plate is preferably a tool plate, which is arranged next to the cavity plate, on the inner surface of which the internal mold pressure is to be measured.
  • the senor comprises a device for mounting on this tool plate, which is advantageously located in the rear region of the sensor, at the cable outlet.
  • the sensor protrudes beyond the surface of the tool plate in the direction of the cavity plate, so that the pressure-sensitive surface of the sensor is flush with the inner surface of a cavity plate attached to the tool plate.
  • FIG. 1 is a schematic perspective view of a tool in the section of a structure comprising a cavity plate and a holding plate for the production of injection-molded parts with a Formin ⁇ nendrucksensor according to the prior art;
  • FIG. 2 shows a cross-section of a schematic representation of a tool comprising a cavity plate and a tool plate with a sensor according to the invention
  • FIG. 3 shows a cross-section of a schematic representation of a tool comprising a cavity plate and a tool plate with an inventive device
  • FIG. 1 shows, in a schematic perspective view in the section, an injection molding tool with a cavity plate 4 for injection molding of molded parts according to the prior art.
  • the molding becomes a gear.
  • This cavity plate 4 is installed in a form-fitting manner in a holding plate 5.
  • a cavity pressure sensor 1 is mounted on the cavity plate 1 in such a way that its pressure-sensitive inlet area is directed towards the cavity of the cavity plate 4 and terminates flush with the cavity.
  • the holding plate 5 and the cavity plate 4 of the underlying tool plate 6 separated, so that the access to the mounting is easily possible from the bottom.
  • recesses or channels 7 are mounted between the individual plates.
  • channels 7 are mounted in the cavity plate 4 and / or in the holding plate 5, through which a cable 2 can run from the sensor 1 to a plug 3.
  • the sensor 1 or the plug 3 first has to pass through the channel 7 before the sensor 1 can be mounted in the cavity plate 4.
  • the cable 2 is an insulated coaxial cable which is extensively mounted on the sensor 1 and on the plug 3.
  • the tool builder which builds the cavity plate 4 with the various plates and assembles it with the sensor 1, must order a sensor with plug 3 and desired length of the cable 2 mounted in a finished manner.
  • the cable 2 must be long enough so that the cavity plate 4 can be mounted and removed, and short enough to be accommodated in the channel 7 without jamming being necessary.
  • FIG. 2 shows an exemplary embodiment of a sensor 1 according to the invention in the installed state.
  • the inventive idea essentially consists in that the frame pressure sensor 1 and the plug 3 can be attached to the same plate. In FIG. 2, these are attached to the tool plate 6.
  • the cavity plate 4 is brought over the sensor 1 when inserted into the recess of the holding plate 5.
  • the sensor 1 must be mounted precisely at a predetermined position at the correct height and extend beyond the tool plate 6 so far that its pressure-sensitive surface is flush with the inner surface Edge of the cavity of the cavity plate 4 in the inserted state is flush.
  • a hole in the tool plate 6 is mounted, in which the sensor can be mounted. This hole is connected to a channel 7, in which the cable 2 can extend to the plug 3.
  • the senor 1 can be fixed with a device 10 for mounting.
  • a thread 11 may be attached in the rear area of the sensor 1 at the cable outlet. It is important that the predefined distance can be achieved from the pressure-sensitive sensor surface to the tool plate surface. Alternative connection possibilities likewise lead to the goal.
  • the sensor 1 can either consist of the measuring element alone or it can surround the measuring element with a protective sleeve 15. Accordingly, the device 10 is then attached to the assembly at the rear part of the measuring element or the protective sleeve 15.
  • the sensor 1 is installed in the tool plate 6 from the side of the cavity plate 4. If neither the sensor 1 nor the plug 3 can be guided through the channel 7, the cable 2 must be able to detachably connect the sensor 1 to the plug 3. As a result, for example, the cable 2 can first pass through the channel 7 and then attach the sensor 1 attached to the cable 2 on one side to the tool plate 6. Then the cable 2 is attached to the plug 3 and finally the plug 3. the tool plate 6 is mounted from the side of the cavity plate 4. The order can be changed accordingly depending on where the cable 2 is mounted first. It should be noted that these connections must be made by a tool manufacturer without special knowledge in the field of cabling, so that this application can be used in industry.
  • a piece of cable 2 on the sensor 1 and the connector 3 are completely assembled and can be connected lös ⁇ bar by means of connector.
  • a connector would be for example a known with the name BNC connector. This is however very large with a diameter of about 15 mm. It is possible to use a Microdot plug which, however, with its approximately 5-6 mm diameter, is very small for this application. Experience has shown that Microdot sticks are not suitable for industrial applications.
  • the sensors 1 used for this purpose often have a diameter of at most 12 or even less than 8 mm.
  • a BNC connector can not be passed through a hole for a small sensor.
  • Smaller connecting plugs such as the Microdot plug, often have a stiffening in the end piece, so that they can not easily be guided in a channel 7 at a right angle.
  • the tool concept must be changed structurally so that the assembly can be carried out.
  • small plugs are generally therefore not suitable for industrial use for this application, because the risk of contamination is very large. Contamination leads to signal loss in piezoelectric sensors or to incorrect measurements when a low-impedance sensor is used. This requires a new removal, cleaning and reassembly, which is a huge effort.
  • a single-conductor cable 2 is used as cable 2 in this arrangement.
  • the mode of operation of such a device is described in CH 692 891.
  • with a piezoelectric signal on a shield be waived if the signal from the sensor 1 to Ver ⁇ stronger leads through an insulated cable and the mass passes through the metal, which surrounds the arrangement of the sensor 1 to the amplifier. This metal also serves as a shield.
  • the amplifier is not connected in the immediate vicinity of the shielding metal, that is to say the tool plate 6, but rather by the plug on a cable, for example 5 m long.
  • a single-conductor cable 2 can be easily attached to a sensor 1 or a plug 3 without special precautions, such as stripping or cleaning the cable ends.
  • the single-conductor cable 2 is cut with scissors to the desired length and plugged into a designated port 14 of the sensor 1 or 3 of the plug.
  • the connection 14 advantageously has a screw terminal with which the input conductor cable 2 is fastened and the desired contact is produced.
  • the Sehraubklemme can be easily solved, whereby the one-conductor cable 2 can be removed or replaced.
  • connection of sensor 1 and connector 3 allow attaching the sensor 1 to the same assembly unit of the injection molding tool assembly, preferably on the tool plate 6, since in this case the sensor 1 no longer has to be threaded.
  • the sensor 1 must have a device 10 for mounting on this tool plate 6. Note the high requirement for precision positioning. This is preferably achieved by means of a thread 11, as shown in Fig. 2.
  • Other possibilities include mounting by means of a flanges 12, which can be attached to the sensor 1 or which can engage a shoulder on the sensor 1. This flange 12 may be secured by screws to the tool plate 6. Such a flange 12 is partially shown on the sensor 1 in Fig. 2 on one side.
  • An advantageous device 10 for mounting the sensor 1 on the tool plate 6 is by means of a clamping device.
  • Die ⁇ se can be achieved for example by springs or by an O-ring.
  • a sensor 1 mounted by means of this clamping device has clearance and only defines the sensor position in its axial direction. This has, that in mounting the cavity plate 4, no voltage can arise in the sensor tip to advantage if the 'the tolerance provided for the sensor 1 is very bore ge ring. In this case, the centering of the sensor 1 is therefore not achieved by the mounting device 10, but rather by the cavity plate 4.
  • FIG. 10 Another possibility of a mounting device 10 is shown in FIG.
  • an extension 8 is attached to a device 10 on the sensor 1.
  • This extension 8 must also meet the requirements of precision.
  • This may comprise a flange 12 attached to the extension 8, which is fastened to the tool plate 6 with screws 13.
  • a flange 12 which is not attached to the extension 8 can be used for the assembly.
  • the person skilled in the art has many equivalent attachment possibilities. knows which meet the requirements of precision.
  • the toolmaker will design the tool plate 6 accordingly and provide it with channels 7 and recesses.
  • novel solutions described herein are suitable primarily for applications of sensors 1 of a diameter of up to 12 mm, preferably up to 8mm.
  • the sensor can be mounted upright in the tool plate 6, so that the pressure-sensitive sensor tip protrudes a desired distance beyond the edge of the tool plate 6, so that the conclusion of the sensor 1 with the above arranged Kavticiansplatte 4 is flush.
  • the sensor 1 can have a protective sleeve 15 or the measuring element alone.
  • the device 10 for assembly must be arranged in the rear region of the sensor 1 and can have any desired configuration. Combinations of the various features shown are readily possible.
  • the toolmaker does not have to know the cable length even when the sensor 1 is being set up. It can use a single-conductor cable 2 if the sensor 1 and / or the plug 3 have a corresponding connection 14. In this case, the cable length can be easily shortened with scissors become. In addition, costs are saved because the single-conductor cable 2 is much cheaper than a shielded coaxial cable.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

L'invention concerne un capteur de pression interne de moule (1) pour mesurer les pressions internes d'outils lors du moulage par injection, ce capteur étant monté dans la plaque (6) d'un outil de moulage par injection, dans laquelle est également placé un connecteur (3) relié au capteur par un câble. Cette plaque est de préférence une plaque-outil (6), disposée à côté d'une plaque à cavité (4) sur la surface interne de laquelle la pression interne du moule est à mesurer. A cet effet, le capteur comprend un dispositif (10) de montage sur la plaque-outil, laquelle se trouve de préférence dans la zone arrière du capteur, à la sortie du câble. Une fois monté, le capteur (1) se trouve en saillie relativement à la surface de la plaque-outil (6), de sorte que la face du capteur sensible à la pression affleure avec la surface interne de la plaque à cavité (4) montée sur la plaque-outil.
PCT/CH2005/000387 2004-07-14 2005-07-06 Capteur de pression interne de moule et disposition de montage WO2006005210A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05754090A EP1765571A1 (fr) 2004-07-14 2005-07-06 Capteur de pression interne de moule et disposition de montage

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH11922004 2004-07-14
CH1192/04 2004-07-14
CH590/05 2005-03-31
CH5902005A CH704035B1 (de) 2004-07-14 2005-03-31 Forminnendrucksensor mit Kabel und Stecker und Messanordnung.

Publications (1)

Publication Number Publication Date
WO2006005210A1 true WO2006005210A1 (fr) 2006-01-19

Family

ID=34971268

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH2005/000387 WO2006005210A1 (fr) 2004-07-14 2005-07-06 Capteur de pression interne de moule et disposition de montage

Country Status (3)

Country Link
EP (1) EP1765571A1 (fr)
CH (1) CH704035B1 (fr)
WO (1) WO2006005210A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103878932A (zh) * 2014-03-12 2014-06-25 大连理工大学 一种分体式双螺纹连接的微注塑测试模具
WO2014179197A1 (fr) 2013-04-30 2014-11-06 Groleau Michael Raymond Connecteur intermédiaire

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112615202B (zh) * 2020-12-30 2022-06-21 季华科技有限公司 一种汽车线束特材盒

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2028927A1 (de) * 1969-06-20 1971-05-13 Kistler Instrumente Ag Druckmesswandler
DE2153302A1 (de) * 1970-10-29 1972-05-04 Tno Druckmesser
DE8907620U1 (de) * 1989-06-22 1989-08-10 HASCO-Normalien Hasenclever & Co, 5880 Lüdenscheid Werkzeug zur Verarbeitung plastischer Massen, insbesondere Kunststoff-Spritzgießwerkzeug
DE19846289A1 (de) * 1997-10-13 1999-05-27 Holding Ag Fa Kk Piezoaufnehmer- und Kabel-Montageanordnung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2028927A1 (de) * 1969-06-20 1971-05-13 Kistler Instrumente Ag Druckmesswandler
DE2153302A1 (de) * 1970-10-29 1972-05-04 Tno Druckmesser
DE8907620U1 (de) * 1989-06-22 1989-08-10 HASCO-Normalien Hasenclever & Co, 5880 Lüdenscheid Werkzeug zur Verarbeitung plastischer Massen, insbesondere Kunststoff-Spritzgießwerkzeug
DE19846289A1 (de) * 1997-10-13 1999-05-27 Holding Ag Fa Kk Piezoaufnehmer- und Kabel-Montageanordnung

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
"Mehr Produktivität für Spritzgiessen und Extrusion", October 2004 (2004-10-01), pages 1 - 8, XP002346982, Retrieved from the Internet <URL:http://old.kistler.com/web/docs.nsf/urlnames/ws_prospectuses090/$file/500-512d-10.04.pdf> [retrieved on 20050928] *
"Werkzeuginnendrucksensor in Einbauhülse mit Front: O 4 mm", January 2005 (2005-01-01), pages 1 - 5, XP002346983, Retrieved from the Internet <URL:http://www.kistler.com/mediaaccess/6155AE__000-510d-01.05.pdf> [retrieved on 20050928] *
GUT H: "QUARZKRISTALL-DRUCKAUFNEHMER FUER PLASTISCHE FORMMASSEN", PLASTVERARBEITER, ZECHNER UND HUETHIG VERLAG GMBH. SPEYER/RHEIN, DE, vol. 27, no. 5, May 1976 (1976-05-01), pages 265 - 266, XP001194118, ISSN: 0032-1338 *
SCHNERR-HAESELBARTH O: "DER HEISSE DRAHT INS WERKZEUG WERKZEUGINNENDRUCK-BASIERTE SYSTEME STEIGERN DIE PRODUKTIVITAT UND SENKEN DIE KOSTEN", KUNSTSTOFFE, CARL HANSER VERLAG. MUNCHEN, DE, vol. 92, no. 7, July 2002 (2002-07-01), pages 56 - 60, XP001119603, ISSN: 0023-5563 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014179197A1 (fr) 2013-04-30 2014-11-06 Groleau Michael Raymond Connecteur intermédiaire
JP2016520191A (ja) * 2013-04-30 2016-07-11 グロロー，マイケル，レイモンド 中継コネクタ
EP2991814A4 (fr) * 2013-04-30 2017-01-11 Groleau, Michael, Raymond Connecteur intermédiaire
CN103878932A (zh) * 2014-03-12 2014-06-25 大连理工大学 一种分体式双螺纹连接的微注塑测试模具
CN103878932B (zh) * 2014-03-12 2016-06-01 大连理工大学 一种分体式双螺纹连接的微注塑测试模具

Also Published As

Publication number Publication date
EP1765571A1 (fr) 2007-03-28
CH704035B1 (de) 2012-05-15

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