WO2003035361A1 - FORMSCHLIEssEINHEIT FÜR EINE SPRITZGIEssMASCHINE - Google Patents
FORMSCHLIEssEINHEIT FÜR EINE SPRITZGIEssMASCHINE Download PDFInfo
- Publication number
- WO2003035361A1 WO2003035361A1 PCT/EP2002/011781 EP0211781W WO03035361A1 WO 2003035361 A1 WO2003035361 A1 WO 2003035361A1 EP 0211781 W EP0211781 W EP 0211781W WO 03035361 A1 WO03035361 A1 WO 03035361A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sensor
- mold
- closing
- force
- clamping unit
- Prior art date
Links
- 238000001746 injection moulding Methods 0.000 title claims abstract description 13
- 238000007789 sealing Methods 0.000 title abstract 7
- 238000002347 injection Methods 0.000 claims abstract description 10
- 239000007924 injection Substances 0.000 claims abstract description 10
- 229920003023 plastic Polymers 0.000 claims abstract description 7
- 239000004033 plastic Substances 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 description 10
- 239000007921 spray Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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
- B29C45/7653—Measuring, controlling or regulating mould clamping forces
-
- 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
- B29C2945/76013—Force
-
- 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
- B29C2945/761—Dimensions, e.g. thickness
- B29C2945/76103—Dimensions, e.g. thickness shrinkage, dilation, dimensional change, warpage
-
- 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
- B29C2945/76224—Closure or clamping unit
- B29C2945/7623—Closure or clamping unit clamping or closing drive 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
- B29C2945/76344—Phase or stage of measurement
- B29C2945/76391—Mould clamping, compression of the cavity
-
- 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 a mold closing unit for an injection molding machine for processing plastics and other plasticizable materials with sensor means for detecting the tool securing force and at least the closing forces according to the preamble of claim 1 and a method according to the preamble of claim 10.
- Such a mold clamping unit is e.g. known from JP 09 254 218 A.
- Strain gauges are provided there in the area of a toggle lever mechanism.
- the arrangement of a sensor in the drive train of the toggle lever has the disadvantage that the transmission ratio of the toggle lever must be included dynamically.
- both the tool securing force and the closing force / locking force can be monitored by the hydraulic pressure.
- This is not possible with injection molding machines with toggle lever drives or other kinematic force transmission means such as eccentrics or thrust cranks.
- the professional world is of the opinion that it is not possible with conventional sensors to meet the requirements for high clamping force with high resolution at the same time for measuring a sufficiently precise tool securing force with the same sensor means.
- Common sensors for measuring the closing force, including the locking force, are strain gauge bar measuring rings, bar measuring plugs, piezoelectric or piezoresistive sensors.
- the surface strain sensor is e.g. the strainer DSRT 1200 from Baumer Sen- sress is known. It is a surface strain sensor with an integrated amplifier for static applications.
- This strain transformer has a mechanical strain increase by a factor of 4. According to the information on the attached product sheet, it is suitable for presses with long cycle times and for weight measurement, as well as for strain measurement on rigid structures. This basically precludes suitability for injection molding machines with short cycle times.
- the present invention is based on the object of providing a simple, inexpensive and nevertheless reliable measuring system which can detect both the tool securing force and the closing force.
- This object is achieved by a mold clamping unit with the features of claim 1 and by a method with the features of claim 10.
- a high-resolution sensor is used, ie a sensor that is also suitable for determining the tool securing force with sufficient accuracy. Nevertheless, the same sensor is also suitable for detecting the closing forces.
- the suitability for both purposes is achieved, inter alia, by the location of the sensor, namely in the area of the support of the locking device. It is therefore located on a substantially non-moving part of the clamping unit, so that it is at least not exposed to dynamic influences.
- the attachment has the advantage that in addition to good accessibility, this part with low mechanical expansion also has a significantly lower mechanical load. Measurement errors in the measurement of the form locking force, due to the lack of parallelism of the plates or injection parts clamped on one side, are minimized by the position of the sensor.
- the invention is explained in more detail below on the basis of an exemplary embodiment shown in the single figure.
- the figure shows a mold closing unit of an injection molding machine for processing plastics, partly in a side view.
- the figure shows the mold closing unit F of an injection molding machine for processing plastics and other plasticizable materials such as ceramic or powdery materials in a side view.
- a machine base 15 On a machine base 15 there is a stationary mold carrier 10 which, together with a movable mold carrier 11, forms a mold clamping space R for receiving an injection mold M.
- At least one closing device 12 is provided for the cyclical opening, closing and closing of the injection mold M.
- the movable mold carrier 11 By actuating the drive unit 19, the movable mold carrier 11 is moved in the direction of the stationary mold carrier 10, the closing force being applied after the positive locking, that is to say after the two mold halves have been in contact with one another.
- this is done by a closing device, but in principle - as is known in the prior art - it is possible to carry out a serial closing, ie first to close the mold with one closing device and then to apply the closing force with a second one.
- the locking device 12 which is formed here by a toggle lever mechanism, preferably a five-point toggle lever, is actuated by the drive 19.
- the locking device 12 is supported on the support, which in the exemplary embodiment is formed by the support element 14.
- Sensor means are provided in the form of the sensor 13 for detecting the tool securing force and at least the closing forces that occur when the injection mold is closed.
- the tool securing force it must be ensured that the tool is not damaged when it is closed or that resistance suddenly occurs that must stop the closing process.
- the sensor means for detecting the tool securing force as well as the closing forces is at least one high-resolution surface strain sensor, which is addressed below as sensor 13.
- This sensor is so high-resolution that he can reliably and adequately record the tool securing force.
- the sensor on the support of the locking device 12 is preferably arranged centrally in the spray axis ss. Other arrangements are possible if the voltage field is known in order, if necessary, to carry out a back calculation on the spray axis ss. It is also possible to provide a plurality of sensors, provided that it is ensured according to the invention that they can detect both the tool securing force and the closing force.
- a single sensor 13 is used as the sensor for detecting all forces.
- the sensor can measure with a single measuring range over the entire force range. Since the measuring range of the sensor is thus designed for the closing force or locking force, the signal of the tool securing force never saturates at any point during the tool movement. In other words, the user can allow a value range for the parameter of the programmable securing force up to the size of the maximum closing force. It is therefore not necessary to switch the measuring range.
- This statically measuring sensor 13 is arranged centrally on the support element 14 of the mold clamping unit F. In the three-platen machine shown in the figure, the support element 14 is located behind the movable mold carrier 11 from the perspective of the stationary mold carrier 10.
- the support element 14 is connected to the stationary mold carrier 10 via force transmission means.
- the force transmission means are guide rails 18, which at the same time serve to guide the movable mold carrier.
- a power transmission means e.g. can be provided in the form of a C-bracket or similar devices with which the forces are passed around the mold clamping space R.
- the inventive principle can be used on a two-platen machine in which the stationary mold carrier also forms the support element for the locking device and e.g. the movable mold carrier is pulled onto the stationary mold carrier 10.
- both the closing force and the tool securing force can be measured.
- Indirect force measurement delivers a signal proportional to the desired measurement variable.
- the expansion strain specially tailored to the application Measuring strip sensor works with a mechanical increase or increase of the elongation. It is preferably an expansion transformer.
- the measuring range is selected so that at maximum closing force approx. 80% to 90% of the maximum signal stroke is achieved.
- the minimally programmable form protection force is essentially limited by the quality of the signal transmission and the resolution of the downstream signal evaluation. Usually, however, this resolution is sufficient to capture the tool securing force with sufficient accuracy.
- a reset circuit for compensating the drift from cycle to cycle can be dispensed with in the downstream amplifier circuit.
- a reset of the measuring chain would require an inactive state for the cyclic measurement of the quasi-static closing force over the time required for a reset. This time includes at least the reset time of the amplifier, usually a few milliseconds, and the time for the system to decay, which in turn depends on the system rigidity and the dynamics in the cycle. This would result in an increase in the cycle time.
- a weak state cannot be achieved in a cyclically operating machine such as the mold-closing unit of a plastic injection molding machine.
- the installation position of the sensor 13 on the support of the locking device 12 is normally favorable in terms of minimizing the measurement errors, preferably for measuring the form securing force. Furthermore, it should be chosen favorably in view of the mechanical and thermal load on the sensor 13 and in terms of its accessibility. It goes without saying that this description can be subjected to various modifications, changes and adaptations which range from equivalents to the appended claims.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Producing Shaped Articles From Materials (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02801905A EP1438174B1 (de) | 2001-10-24 | 2002-10-22 | Formschliesseinheit für eine spritzgiessmaschine |
AT02801905T ATE297306T1 (de) | 2001-10-24 | 2002-10-22 | Formschliesseinheit für eine spritzgiessmaschine |
CA002464123A CA2464123A1 (en) | 2001-10-24 | 2002-10-22 | Mould sealing unit for an injection moulding machine |
JP2003537902A JP2005506223A (ja) | 2001-10-24 | 2002-10-22 | 射出成形機の型締ユニット |
DE50203375T DE50203375D1 (de) | 2001-10-24 | 2002-10-22 | Formschliesseinheit für eine spritzgiessmaschine |
US10/492,459 US20040265410A1 (en) | 2001-10-24 | 2002-10-22 | Mould sealing unit for an injection moulding machine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10151352A DE10151352B4 (de) | 2001-10-24 | 2001-10-24 | Formschließeinheit für eine Spritzgießmaschine |
DE10151352.6 | 2001-10-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003035361A1 true WO2003035361A1 (de) | 2003-05-01 |
Family
ID=7702860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2002/011781 WO2003035361A1 (de) | 2001-10-24 | 2002-10-22 | FORMSCHLIEssEINHEIT FÜR EINE SPRITZGIEssMASCHINE |
Country Status (7)
Country | Link |
---|---|
US (1) | US20040265410A1 (de) |
EP (1) | EP1438174B1 (de) |
JP (1) | JP2005506223A (de) |
AT (1) | ATE297306T1 (de) |
CA (1) | CA2464123A1 (de) |
DE (2) | DE10151352B4 (de) |
WO (1) | WO2003035361A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1886789B1 (de) | 2005-06-02 | 2016-01-20 | Sumitomo Heavy Industries, Ltd. | Verfahren zur einstellung von spritzgiessbedingungen und formschliessvorrichtung |
CN105704440A (zh) * | 2014-11-25 | 2016-06-22 | 霍尼韦尔国际公司 | 用于保护隐私的视频保真度的情境调整的系统及方法 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008050944A1 (de) | 2008-10-10 | 2010-04-15 | Karl Hehl | Vorrichtung zur Erfassung der an einer Spritzgießmaschine auftretenden Kräfte |
JP5173000B2 (ja) * | 2011-08-09 | 2013-03-27 | ファナック株式会社 | 型締力検出部を有する射出成形機 |
US9372124B2 (en) | 2012-01-20 | 2016-06-21 | Baker Hughes Incorporated | Apparatus including strain gauges for estimating downhole string parameters |
US10974430B2 (en) * | 2017-05-02 | 2021-04-13 | iMFLUX Inc. | Method for controlling a rate or force of a clamp in a molding system using one or more strain gauges |
AT520955B1 (de) | 2018-01-18 | 2020-08-15 | Engel Austria Gmbh | Messvorrichtung zur Messung des Abstands zweier ausgewählter Punkte |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5625429A (en) * | 1979-08-09 | 1981-03-11 | Japan Steel Works Ltd:The | Automatic adjusting device for die-tightening force of toggle-type injection molding machine |
EP0024518A1 (de) * | 1979-07-18 | 1981-03-11 | Mannesmann Demag Kunststofftechnik Zweigniederlassung Der Mannesmann Demag Aktiengesellschaft | Verfahren und Vorrichtung zum Messen der Schliess- und Zuhaltekraft an Druck- und Spritzgiessmaschinen |
JPH05185481A (ja) * | 1992-01-09 | 1993-07-27 | Japan Steel Works Ltd:The | 射出成型機用型締め力測定方法及びその装置 |
JPH09254218A (ja) * | 1996-03-26 | 1997-09-30 | Sumitomo Heavy Ind Ltd | 射出成形機の金型保護装置 |
-
2001
- 2001-10-24 DE DE10151352A patent/DE10151352B4/de not_active Expired - Lifetime
-
2002
- 2002-10-22 DE DE50203375T patent/DE50203375D1/de not_active Expired - Lifetime
- 2002-10-22 EP EP02801905A patent/EP1438174B1/de not_active Expired - Lifetime
- 2002-10-22 US US10/492,459 patent/US20040265410A1/en not_active Abandoned
- 2002-10-22 AT AT02801905T patent/ATE297306T1/de active
- 2002-10-22 JP JP2003537902A patent/JP2005506223A/ja active Pending
- 2002-10-22 CA CA002464123A patent/CA2464123A1/en not_active Abandoned
- 2002-10-22 WO PCT/EP2002/011781 patent/WO2003035361A1/de active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0024518A1 (de) * | 1979-07-18 | 1981-03-11 | Mannesmann Demag Kunststofftechnik Zweigniederlassung Der Mannesmann Demag Aktiengesellschaft | Verfahren und Vorrichtung zum Messen der Schliess- und Zuhaltekraft an Druck- und Spritzgiessmaschinen |
JPS5625429A (en) * | 1979-08-09 | 1981-03-11 | Japan Steel Works Ltd:The | Automatic adjusting device for die-tightening force of toggle-type injection molding machine |
JPH05185481A (ja) * | 1992-01-09 | 1993-07-27 | Japan Steel Works Ltd:The | 射出成型機用型締め力測定方法及びその装置 |
JPH09254218A (ja) * | 1996-03-26 | 1997-09-30 | Sumitomo Heavy Ind Ltd | 射出成形機の金型保護装置 |
Non-Patent Citations (3)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 17, no. 607 (M - 1507) 9 November 1993 (1993-11-09) * |
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 1 30 January 1998 (1998-01-30) * |
PATENT ABSTRACTS OF JAPAN vol. 5, no. 76 (M - 69) 20 May 1981 (1981-05-20) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1886789B1 (de) | 2005-06-02 | 2016-01-20 | Sumitomo Heavy Industries, Ltd. | Verfahren zur einstellung von spritzgiessbedingungen und formschliessvorrichtung |
CN105704440A (zh) * | 2014-11-25 | 2016-06-22 | 霍尼韦尔国际公司 | 用于保护隐私的视频保真度的情境调整的系统及方法 |
Also Published As
Publication number | Publication date |
---|---|
DE10151352A1 (de) | 2003-05-28 |
DE50203375D1 (de) | 2005-07-14 |
EP1438174A1 (de) | 2004-07-21 |
US20040265410A1 (en) | 2004-12-30 |
DE10151352B4 (de) | 2005-05-25 |
EP1438174B1 (de) | 2005-06-08 |
ATE297306T1 (de) | 2005-06-15 |
JP2005506223A (ja) | 2005-03-03 |
CA2464123A1 (en) | 2003-05-01 |
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