EP1509378A1 - Verfahren zum herstellen eines harzgebundenen formteils - Google Patents
Verfahren zum herstellen eines harzgebundenen formteilsInfo
- Publication number
- EP1509378A1 EP1509378A1 EP03727320A EP03727320A EP1509378A1 EP 1509378 A1 EP1509378 A1 EP 1509378A1 EP 03727320 A EP03727320 A EP 03727320A EP 03727320 A EP03727320 A EP 03727320A EP 1509378 A1 EP1509378 A1 EP 1509378A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- molding compound
- hardening
- treatment step
- pressing
- carried out
- 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- Withdrawn
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 229920005989 resin Polymers 0.000 title claims description 7
- 239000011347 resin Substances 0.000 title claims description 7
- 238000000034 method Methods 0.000 claims abstract description 26
- 238000000465 moulding Methods 0.000 claims description 22
- 150000001875 compounds Chemical class 0.000 claims description 19
- 238000003825 pressing Methods 0.000 claims description 16
- 238000004381 surface treatment Methods 0.000 claims description 6
- 238000007872 degassing Methods 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 16
- 238000007493 shaping process Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 5
- 238000011065 in-situ storage Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012432 intermediate storage Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
- F16D69/025—Compositions based on an organic binder
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/58—Measuring, controlling or regulating
-
- 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
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/006—Degassing moulding material or draining off gas during moulding
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/006—Pressing and sintering powders, granules or fibres
-
- 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
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/10—Surface shaping of articles, e.g. embossing; Apparatus therefor by electric discharge treatment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C2035/0211—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould resistance heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2503/00—Use of resin-bonded materials as filler
- B29K2503/04—Inorganic materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/16—Frictional elements, e.g. brake or clutch linings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/748—Machines or parts thereof not otherwise provided for
- B29L2031/7482—Brakes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/748—Machines or parts thereof not otherwise provided for
- B29L2031/7486—Clutches
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0082—Production methods therefor
- F16D2200/0086—Moulding materials together by application of heat and pressure
Definitions
- the invention relates to a method for producing a resin-bonded molded part, in particular a friction lining for a brake or clutch lining, a resin-containing molding compound being pressed and thermally hardened.
- the invention is applicable to the production of any resin-bonded molded parts, specifically they can be manufactured as a single part or connected to functional parts at the same time.
- the main area of application of the invention is the production of friction linings for brake or clutch linings, if need be with simultaneous connection to associated carrier plates with or without the interposition of an underlayer.
- Another area of application is the production of carbon brushes for electric motors.
- the resinous molding compounds are powdery mixtures which are pressed under high pressure and often with simultaneous heating.
- the simultaneous heating serves to melt the resins and, depending on the temperature, to initiate the crosslinking of the resins.
- the pressing process is also called shaping. Pressing creates an amorphous molding compound that has almost its final shape. However, it still lacks the required strength. This is generated by hardening, that is, by supplying heat at high temperature, the phenolic resins used as binders being crosslinked.
- the repeated heating processes are energy and time consuming.
- the object of the invention is therefore to accelerate the production of molded parts and to make them more energy-efficient.
- the method mentioned at the outset is characterized according to the invention in that the pressing and the thermal hardening are carried out in a single treatment step, the pressure and the temperature being controlled.
- the end compressibility is often of crucial importance.
- This product property is set by the pressing process and by the hardening process.
- the invention offers the possibility of the pressing forces, the pressing times and the
- the invention enables in situ control to maintain narrow product tolerances.
- the pressing processes can be controlled depending on the force and / or path. This enables adaptation to a wide variety of specifications and operating conditions.
- a surface treatment is also required, namely a strong heating of the friction surface in order to carbonize it.
- the friction lining only develops its full friction effect when it is carbonized. So-called scorching ensures that the friction lining has its full effect right from the start.
- the hardened friction linings are usually stored again until the surface is heated to carry out the scorching.
- the treatment time from the start of pressing to the end of the surface treatment is extremely short. Electric current is preferably passed through the molding compound for thermal hardening and for thermal surface treatment. The heat is therefore not supplied from the outside, but generated within the molding compound.
- the current flows are of different strengths.
- one preferably works with a matrix of electrodes which are alternately polarized in opposite directions.
- a part of the electrodes works with both the opposite support of the press and with the other part of the electrodes.
- Reaction gases are formed in the molding compound during the pressing process and during hardening. It is therefore proposed in a further development of the invention to degas the molding compound continuously or intermittently during the treatment step. The air trapped during pressing then escapes.
- the molding compound can be degassed in the pressing direction and / or transversely thereto. Radial degassing is particularly advantageous because the lateral surfaces of the compact are less smoothed and hardened than the surfaces on the punch and on the plug punch holding plate.
- the compact is preferably held between the punch and the plug-punch holding plate, while the profile insert of the mold, which forms the clamping frame during pressing and initially during hardening, is pulled up or down from the compact, thereby exposing the radial surfaces of the compact. This measure is also particularly suitable for hardening under power supply, since the punch and the plug punch holding plate are electrically insulated from one another when the profile insert is removed and are only in an electrically conductive connection via the compact.
- a pressing tool is filled with molding compound in the usual way.
- the plug punch holding plate is then lowered onto the profile insert of the tool.
- a closing force is generated between the profile insert and the plug punch holding plate, and then the forming force is generated between the punch and the assembly consisting of the plug punch holding plate and the profile insert.
- the molding process is completed in a matter of seconds.
- the closing force can then be released.
- the forming force is minimized to the extent that is necessary to avoid an inadmissible deformation of the compact under the internal gas pressure and to adjust the compressibility properties of the compact. This force is called the tension force.
- the profile insert is lowered synchronously with the reduction of the forces.
- the compact can now outgas over its radial areas.
- the clamping force can only be maintained by a path to be determined. It must be reduced to a level that only results in a previously set, permissible compression. If the path covered in the clamping process is limited and an accepted shrinkage dimension is reached, any further change in path is prevented by a lock.
- an electrical voltage can be applied between the friction side of the clamped compact and the plug punch holding plate.
- the plug punch holding plate is electrically insulated from the machine body. The current flowing through the compact heats the molding compound homogeneously from the inside.
- a matrix of electrodes with alternating polarity is used on that side of the compact which is to be surface-treated. Part of the current flows to the other side of the tool and causes hardening. Another portion of the current flows between adjacent electrodes and causes the associated surface to be scorched.
- the system is equipped with devices that detect the thickness of the compact, register changes in path during the process and serve to control the process in situ. Temperature sensors with product contact are located in the stamp and in the plug stamp holding plate. The product temperature during clamping is measured by contacting a sensor on the draft of the compact. The temperature detection also serves to control the process in situ.
- the relatively high shaping force can be tapped from the pressure of a hydraulic system or via the stamp.
- the lower clamping force must be measured and adhered to exactly.
- the plug holder plate is therefore equipped with appropriate force sensors. The information from the force measurements is also used to control the process in situ.
- Gases that are generated during the process are discharged through a suction device surrounding the compact so that as little external air as possible is captured.
- the compact should not cool down due to external air. Possibly. conditioned supply air is supplied.
- the molding time can be less than one second.
- the molding temperature is 20 ° C to 230 ° C.
- the clamping temperature during curing can be up to 800 ° C.
- the forming force is 5kN to 250kN or more, while the clamping force is 0.5kN to 7kN or more. Both forces can be changed during treatment.
- the duration of the tensioning can be less than five seconds.
- the method can be carried out with a system of small size, for example with a system which has a mobile and modular structure. There is no difference between cold and hot presses. Since gas-related errors (bubbles, cracks, possibly edge loosening) are avoided, the scrap rate is very low.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Braking Arrangements (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Mechanical Operated Clutches (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10218560A DE10218560B4 (de) | 2002-04-25 | 2002-04-25 | Verfahren zum Herstellen eines harzgebundenen Formteils |
DE10218560 | 2002-04-25 | ||
PCT/EP2003/004053 WO2003090994A1 (de) | 2002-04-25 | 2003-04-17 | Verfahren zum herstellen eines harzgebundenen formteils |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1509378A1 true EP1509378A1 (de) | 2005-03-02 |
Family
ID=29264835
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03727320A Withdrawn EP1509378A1 (de) | 2002-04-25 | 2003-04-17 | Verfahren zum herstellen eines harzgebundenen formteils |
Country Status (10)
Country | Link |
---|---|
US (1) | US20060131792A1 (de) |
EP (1) | EP1509378A1 (de) |
JP (1) | JP2006505420A (de) |
KR (1) | KR100730709B1 (de) |
AU (1) | AU2003233987B2 (de) |
BR (1) | BR0309540A (de) |
DE (1) | DE10218560B4 (de) |
PL (1) | PL202282B1 (de) |
WO (1) | WO2003090994A1 (de) |
ZA (1) | ZA200408579B (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006006921A1 (de) * | 2006-02-15 | 2007-08-23 | Tmd Friction Services Gmbh | Verfahren und Vorrichtung zur Herstellung von Reibbelägen |
CN102472329B (zh) * | 2009-07-23 | 2014-06-04 | 舍弗勒技术股份两合公司 | 用于制造摩擦片的方法 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4409048A (en) * | 1975-03-10 | 1983-10-11 | Hitco | High temperature consolidation process |
US4193956A (en) * | 1975-09-05 | 1980-03-18 | McPheasons Limited | Process for curing thermosetting resins and elastomers |
GB1557034A (en) * | 1976-09-01 | 1979-12-05 | Mcphersons Ltd | Method and apparatus for shaping heat bondable materials |
GB2106823B (en) * | 1981-09-03 | 1985-08-14 | Lucas Ind Plc | Producing a friction element for a disc brake |
JPH07179824A (ja) * | 1993-12-24 | 1995-07-18 | Hakusan Seisakusho:Kk | 接着方法 |
JP3224324B2 (ja) * | 1994-05-16 | 2001-10-29 | アイシン化工株式会社 | 摩擦材の熱成形方法及び熱成形金型 |
DE4430528C2 (de) * | 1994-08-27 | 2003-09-18 | Werzalit Ag & Co | Verfahren und Vorrichtung zur Herstellung von Formteilen |
US5576358A (en) * | 1995-02-03 | 1996-11-19 | Alliedsignal Inc. | Composition for use in friction materials and articles formed therefrom |
JP3592497B2 (ja) * | 1997-09-08 | 2004-11-24 | 日本ブレーキ工業株式会社 | 加熱接着方法及び装置 |
JPH11254473A (ja) * | 1998-03-16 | 1999-09-21 | Akebono Brake Res & Dev Center Ltd | 摩擦材の製造方法 |
DE19928858C2 (de) * | 1999-06-24 | 2003-08-07 | Ruetgers Automotive Ag | Verfahren und Vorrichtung zum Herstellen eines Bremsbelags |
-
2002
- 2002-04-25 DE DE10218560A patent/DE10218560B4/de not_active Expired - Fee Related
-
2003
- 2003-04-17 KR KR1020047017131A patent/KR100730709B1/ko not_active IP Right Cessation
- 2003-04-17 US US10/512,302 patent/US20060131792A1/en not_active Abandoned
- 2003-04-17 PL PL371560A patent/PL202282B1/pl not_active IP Right Cessation
- 2003-04-17 JP JP2003587597A patent/JP2006505420A/ja active Pending
- 2003-04-17 BR BR0309540-1A patent/BR0309540A/pt not_active IP Right Cessation
- 2003-04-17 WO PCT/EP2003/004053 patent/WO2003090994A1/de active IP Right Grant
- 2003-04-17 EP EP03727320A patent/EP1509378A1/de not_active Withdrawn
- 2003-04-17 AU AU2003233987A patent/AU2003233987B2/en not_active Ceased
-
2004
- 2004-10-22 ZA ZA200408579A patent/ZA200408579B/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO03090994A1 * |
Also Published As
Publication number | Publication date |
---|---|
PL371560A1 (en) | 2005-06-27 |
US20060131792A1 (en) | 2006-06-22 |
JP2006505420A (ja) | 2006-02-16 |
DE10218560A1 (de) | 2003-11-20 |
DE10218560B4 (de) | 2004-06-03 |
KR100730709B1 (ko) | 2007-06-21 |
BR0309540A (pt) | 2005-02-01 |
WO2003090994A1 (de) | 2003-11-06 |
AU2003233987B2 (en) | 2007-07-26 |
KR20040104620A (ko) | 2004-12-10 |
PL202282B1 (pl) | 2009-06-30 |
ZA200408579B (en) | 2006-07-26 |
AU2003233987A1 (en) | 2003-11-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20041125 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: TMD FRICTION SERVICES GMBH |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: REINEKE, ULRICH Inventor name: HOGENKAMP, WOLFGANG |
|
17Q | First examination report despatched |
Effective date: 20070427 |
|
RTI1 | Title (correction) |
Free format text: METHOD AND MOULDING PRESS FOR PRODUCING A RESIN BONDED MOULDED PART |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20111101 |