EP4408708A1 - Wischgummiprofil und verfahren zu dessen herstellung - Google Patents
Wischgummiprofil und verfahren zu dessen herstellungInfo
- Publication number
- EP4408708A1 EP4408708A1 EP22786955.9A EP22786955A EP4408708A1 EP 4408708 A1 EP4408708 A1 EP 4408708A1 EP 22786955 A EP22786955 A EP 22786955A EP 4408708 A1 EP4408708 A1 EP 4408708A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wiper
- rubber
- rubber material
- profile
- head part
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/04—Wipers or the like, e.g. scrapers
- B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
- B60S1/38—Wiper blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/04—Wipers or the like, e.g. scrapers
- B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
- B60S1/38—Wiper blades
- B60S2001/3827—Wiper blades characterised by the squeegee or blade rubber or wiping element
- B60S2001/3829—Wiper blades characterised by the squeegee or blade rubber or wiping element characterised by the material of the squeegee or coating thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/04—Wipers or the like, e.g. scrapers
- B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
- B60S1/38—Wiper blades
- B60S2001/3898—Wiper blades method for manufacturing wiper blades
Definitions
- the invention relates to a wiper rubber profile and a method for its production according to the preamble of the independent patent claims.
- wiper rubber profiles for wiper strips of windshield wipers for motor vehicles cause high turning noises, especially when changing the direction of movement while cleaning a corresponding glass surface.
- the reason for this is a pulse-like impact of a wedge shoulder, which delimits the wiper lip in the direction of the head part of the wiper rubber profile, against a squeegee attached to the head part when the wiper rubber profile is folded over.
- These folding noises are usually perceived as annoying.
- DE 102005055343 A1 discloses a wiper blade rubber in which the wedge-shaped widening of the wiper lip in the direction of the head part is provided with elevations or recesses at regular intervals and thus also serves to reduce a possible tilting noise.
- a wiper blade is known from US Pat. No. 4,658,463, in which, among other things, flanks of the wiper rubber profile are formed from a soft rubber which is surrounded by a foamed plastic body or a foamed rubber body.
- a wiper rubber profile is made available which is used, for example, to clean windows on motor vehicles and which comprises a head part and a wiper lip, the wiper rubber lip being connected to the head part via a tilting web.
- the head part serves to mechanically fasten the wiper rubber profile to a corresponding holder of a wiper strip of a windshield wiper and the wiper rubber lip, in particular in its area facing the head part, serves to clean a glass surface to be cleaned.
- the squeegee lip is connected to the head part via a flexible tilting web, so that the squeegee lip encloses an angle relative to the head part that depends on the contact pressure of the squeegee profile on a glass surface to be cleaned.
- the wiper rubber profile is formed from a first rubber material and a second rubber material.
- the second rubber material is a porous rubber material. Both rubber materials are coextruded together to create the wiper rubber profile.
- this measure is that porous or foamed rubber materials have good sound-absorbing properties. If parts of the wiper rubber profile are made of such a porous or foamed rubber, this measure means that noises that are due to the wiper rubber profile and occur during operation of the same can be effectively dampened. Such noise developments are to be expected above all in the area of the head part, where this is in physical contact with a wiper strip of a windshield wiper, and in the area of the wiper lip, since at the reversal point of a wiper strip during operation, this tends to hit the outer areas of the head part with its outer areas . If, above all, such areas of the wiper rubber profile are made of a porous or foamed rubber material, possible noise development can be effectively suppressed.
- a squeegee provided on the head part of the wiper rubber profile, which serves as a stop for the wiper rubber lip in the tilted state during operation is made of the second rubber material, and if additionally or alternatively those surface areas of the wiper rubber lip which are in the tilted condition of the squeegee lip come into physical contact with the squeegee from which the second rubber material is made.
- surface areas of the head part of the wiper rubber profile are made of the second rubber material.
- the tip of the squeegee profile is in physical contact with a wiper strip of a windshield wiper.
- this area when the direction of movement of a windshield wiper containing the wiper rubber profile changes, there is a folding noise in the area of the contact points between the wiper strip and the head part of the wiper rubber profile. If these areas are made of the second rubber material, which has a foamed character, then there is also an effective reduction in the turning noise here.
- the entire head part of the wiper rubber profile is also possible to make the entire head part of the wiper rubber profile from the second rubber material.
- This significantly simplifies the manufacture of the wiper rubber profile since in this case both the wiper strip of the head part and its surface areas, which are in physical contact with a wiper strip, are made of the second material.
- the entire area of the wiper rubber lip, which points in the direction of the head part of the wiper rubber profile, can also be made of the second rubber material. This also enables a corresponding wiper rubber profile to be produced in a simple manner while achieving an optimal noise-dampening effect of the same.
- the invention also relates to a method for producing the wiper rubber profile according to the invention.
- a first and a second rubber material are provided.
- the second rubber material contains a pore-forming agent. Both rubber materials are coextruded with one another, with a wiper rubber profile being formed. At the same time or subsequently, pores are formed within the second rubber material on the basis of pore formers added to the second rubber material, with the result that the latter develops its porous or foamed character.
- the resulting wiper rubber profile is first provided with a wiper strip or with spring rails of a wiper strip, before the pore-forming agents provided in the second rubber material are thermally activated, for example, to form corresponding pores within the second rubber material activated become.
- the advantage of this procedure is that in this case the area of the head part formed from the second rubber material comes into contact with the wiper strip or the spring rails, which leads to a further reduction in noise development during operation of the wiper rubber profile.
- the wiper rubber profile according to the invention can be used advantageously in windshield wipers for motor vehicles, in wiping devices for sensor surfaces or for cleaning building glazing.
- Figure 1 shows the schematic cross section of a wiper strip for a windshield wiper, containing a wiper rubber profile according to a first embodiment of the present invention
- FIG. 1 schematic cross sections of wiper rubber profiles according to further embodiments of the present invention.
- FIG. 1 shows a wiper rubber profile according to a first embodiment of the present invention.
- the wiper rubber profile 10 includes a head part 12, which serves, for example, to mechanically fix the wiper rubber profile 10 in a holder, for example a windscreen wiper for motor vehicles.
- the wiper rubber profile 10 comprises a wiper lip 14 which, in particular with its side facing away from the head part 12, serves to clean a surface to be cleaned.
- the wiper lip 14 is connected to the head part 12, for example via a tilting web 16 which is flexible is executed, and an angled arrangement of the wiper lip 14 relative to the head part 12 of the wiper rubber profile 10 allows.
- Such an angular arrangement occurs, for example, during a wiping movement of the wiper rubber profile 10 during operation.
- the wiper lip 14 is folded over in relation to the head part 12 of the wiper rubber profile 10. Without further measures, such a folding over may result in a disturbing, banging folding noise.
- FIG. 1 shows a wiper blade 20 which includes a wiper strip 22 and spring rails 24.
- the spring rails 24 engage in depressions in the head part 12 of the wiper rubber profile 10 and serve to mechanically stabilize the wiper rubber profile 10 during operation of the same.
- the wiper rubber profile 10 comprises areas made of a first rubber material 30 and areas made of a second rubber material 32.
- the second rubber material 32 is porous or foamed, for example, and contains pores in its material.
- the wiper rubber profile 10 is made of the second rubber material 32 in those areas of the head part 12 which are in direct physical contact with the spring rails 24 of the wiper strip 22 .
- the particular advantage of these measures is that noises caused by the wiper rubber profile 10 moving in relation to the position of the spring rails 24 are effectively suppressed or dampened by the noise-dampening properties of the second rubber material 32 .
- FIG. 2a A first further embodiment of the wiper rubber profile according to the invention is shown in FIG. 2a.
- this parts of a squeegee 18 or the complete wiper strip 18 of the head part 12 is made of the second rubber material 32 .
- FIG. 2b A comparable effect can also be achieved with the embodiment of a wiper rubber profile 10 shown in FIG. 2b.
- shoulders 26 of the wiper lip 14, which come into physical contact with the head part 12 during operation, are made of the second rubber material 32.
- FIG. 2c A combination of both measures is shown in FIG. 2c in the wiper rubber profile 10 shown there according to a third embodiment. In this case, both parts of the wiper strip 18 and the shoulders 26 of the wiper rubber profile 10 are made of the second rubber material 32 .
- FIG. 2d shows a fourth embodiment of a wiper rubber profile 10 according to the present invention.
- the upper area of the head part 12 facing away from the wiper lip 14 is made of the second rubber material 32 . This further increases the noise-dampening effect of the wiper rubber profile 10 shown in FIG.
- both noise-damping measures can be avoided in combination, such as the one that affects folding noises in the area of the wiper rubber lip 14 and the one that affects noise in the area of the transition from spring rail 24 to head part 12 .
- the wiper rubber profile 10 is made of the second rubber material 32 both in its entire head part 12 and in the area of the wiper lip 14 facing the head part 12 .
- the entire head part 12 is made of the second rubber material 32 . This embodiment takes into account the fact that high mechanical loads rest on the tilting web 16 during operation and it therefore appears advantageous to make it from the first, non-porous rubber material 30 .
- the various embodiments of the wiper rubber profile 10 can be produced by initially providing the first rubber material 30 and a second rubber material 32 for an extruder, which contains a pore-forming agent in addition to the rubber material.
- Suitable starting materials for both rubber materials are polymers such as ethylene-propylene-diene rubber (EPDM), ethylene-propylene rubber (EPM), chloroprene (CR), natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), Nitrile Butadiene Rubber (NBR), Hydrogenated Nitrile Butadiene Rubber (HNBR), Ethylene Vinyl Acetate Rubber (EVM) and Silicone Rubbers (VMQ).
- the first as well as the second rubber material can be based on the same polymer base material or on different polymer materials.
- Water-containing fillers, hydrates, carbonates or hydrogen carbonates are added to the second rubber material 32 as pore formers, for example, with a decomposition temperature preferably between 130° C. and 210° C., in particular between 140° C. and 200° C.
- a decomposition temperature preferably between 130° C. and 210° C., in particular between 140° C. and 200° C.
- These are, for example, CaSO4.2H2O, CaSC ⁇ A ⁇ O, MgSO4.7H20, MgCO3.3H2O, sodium citrate dihydrate (Na3C6H5O7.2H20) or sodium citrate pentahydrate (NasCeHsO/.ö ⁇ der ö ⁇ O).
- water-based fillers, hydrates, carbonates or hydrogen carbonates is advantageous compared to classic pore formers such as azodicarbonamides (ADC/ ADCA), p-p'-oxybis(benzenesulfonyl hydrazide / 4,4'-oxydi(benzenesulfonyl hydrazide)) (OBSH) and dinitrosopentamethyltetramine (DPNT), which are classified as dangerous substances.
- ADC/ ADCA azodicarbonamides
- OBSH p-p'-oxybis(benzenesulfonyl hydrazide / 4,4'-oxydi(benzenesulfonyl hydrazide))
- DPNT dinitrosopentamethyltetramine
- foaming of the second rubber material 32 can occur due to thermal decomposition of the pore-forming agent.
- pore formers that decompose at higher temperatures, such as those prevailing downstream of the coextrusion process during crosslinking of the rubber materials 30, 32 in a salt bath or a hot-air oven. In this way, an effective material connection of the two rubber materials 30, 32 is achieved, as well as a high porosity of the foamed second rubber material 32 and, associated therewith, sufficiently good noise damping.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Seal Device For Vehicle (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021210972.1A DE102021210972A1 (de) | 2021-09-30 | 2021-09-30 | Wischgummiprofil und Verfahren zu dessen Herstellung |
| PCT/EP2022/076889 WO2023052379A1 (de) | 2021-09-30 | 2022-09-28 | Wischgummiprofil und verfahren zu dessen herstellung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4408708A1 true EP4408708A1 (de) | 2024-08-07 |
Family
ID=83689794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22786955.9A Pending EP4408708A1 (de) | 2021-09-30 | 2022-09-28 | Wischgummiprofil und verfahren zu dessen herstellung |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4408708A1 (de) |
| CN (1) | CN118055873A (de) |
| DE (1) | DE102021210972A1 (de) |
| WO (1) | WO2023052379A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3205573A1 (de) * | 1982-02-17 | 1983-06-30 | Josef Ing.(grad.) 8440 Straubing Hößl | Scheibenwischer mit vorreiniger |
| JPH0134911Y2 (de) | 1984-10-11 | 1989-10-24 | ||
| FR2734223B1 (fr) | 1995-05-17 | 1997-06-13 | Valeo Systemes Dessuyage | Raclette d'essuyage pour un essuie-glace de vehicule automobile |
| DE19615421B4 (de) | 1996-04-19 | 2007-11-15 | Robert Bosch Gmbh | Wischerblatt mit Polychloropren |
| DE102005055343A1 (de) | 2005-04-07 | 2006-10-12 | Robert Bosch Gmbh | Wischgummi |
| DE102013226928A1 (de) | 2013-12-20 | 2015-06-25 | Robert Bosch Gmbh | Wischleiste für ein Wischblatt |
| KR101693832B1 (ko) * | 2016-06-17 | 2017-01-06 | 주식회사 킴블레이드 | 단공형 각도 유지형 와이퍼 블레이드 |
-
2021
- 2021-09-30 DE DE102021210972.1A patent/DE102021210972A1/de active Pending
-
2022
- 2022-09-28 CN CN202280066449.0A patent/CN118055873A/zh active Pending
- 2022-09-28 EP EP22786955.9A patent/EP4408708A1/de active Pending
- 2022-09-28 WO PCT/EP2022/076889 patent/WO2023052379A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021210972A1 (de) | 2023-03-30 |
| WO2023052379A1 (de) | 2023-04-06 |
| CN118055873A (zh) | 2024-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE3440677C2 (de) | Gummiwischblatt | |
| EP2181024A1 (de) | Wischblatt | |
| DE2734971A1 (de) | Tuerdichtung fuer kraftfahrzeuge | |
| EP2462010B1 (de) | Wischblatt in flachbalkenbauweise | |
| DE102005055343A1 (de) | Wischgummi | |
| EP1053142B1 (de) | Wischerblatt | |
| EP3879062B1 (de) | Dichtungsband und verfahren zu dessen herstellung | |
| EP2280812B1 (de) | Verfahren zur herstellung von strangextrudaten für wischblätter | |
| EP4408708A1 (de) | Wischgummiprofil und verfahren zu dessen herstellung | |
| DE10058454A1 (de) | Wischeranordnung und Verfahren zum Herstellen einer Wischeranordnung | |
| EP2435281B1 (de) | Wischerblatt für einen scheibenwischer | |
| DE3904152A1 (de) | Gummielastisches teil und verfahren zu seiner herstellung | |
| EP1233137B1 (de) | Vorrichtung zum Abdichten der unteren Stirnfläche einer schwellenlosen Türe | |
| DE10025629A1 (de) | Wischvorrichtung, insbesondere für Kraftfahrzeuge | |
| DE102016223248B4 (de) | Wischgummiprofil | |
| EP2805807A1 (de) | Werkstoffmischung aus EPDM, Ethylen-Propylen Copolymer und Schwefel zur Nutzung für Tür- und Fensterdichtungen | |
| DE102016216257A1 (de) | Wischgummi für Wischblätter von Scheibenwischern, Verfahren und Werkzeuge zu dessen Herstellung | |
| EP3577167A1 (de) | Werkstoffmischung für ein dichtungsprofil | |
| DE102009049455A1 (de) | Dichtungsprofil und Verfahren zur Herstellung eines Dichtungsprofils | |
| DE10230682B4 (de) | Dichtungsanordnung zum Abdichten eines Spalts, insbesondere an einem Kraftfahrzeug | |
| DE9402689U1 (de) | Anschlagdichtung | |
| DE102016222380A1 (de) | Wischleiste und Verfahren zur Herstellung derselben | |
| BE1021724B1 (de) | Wischgummiprofil und verfahren zur herstellung desselben | |
| DE102005012685A1 (de) | Verfahren zum Herstellen eines Dichtungsstranges, insbesondere für ein Kraftfahrzeug, und ein solcher Dichtungsstrang | |
| DE102021212633A1 (de) | Wischblatt und Verfahren zur Herstellung desselben |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| 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 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20240430 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
| 17Q | First examination report despatched |
Effective date: 20251126 |