DE102009032876A1 - Method for producing sealing or covering strip for motor vehicle, involves connecting bar section with arm section, and forming holding lip at arm section such that free end of holding section is in direction of insertion channel opening - Google Patents

Abstract

The method involves connecting arm sections (26, 27) of an insertion region (20) with each other by a basis section (25) that forms an insertion channel (29) provided with an opening. The region is provided with a holding lip (21) having a bar section and a holding section with a free end, where the bar section is connected with one of the arm sections. The lip is formed at the former arm section such that the free end is in a direction of the opening. The lip is inserted into an accommodating channel, and lies at a flange (51) during insertion of a sealing or covering strip on the flange.

Description

The The invention relates to a method for producing a sealing or Abdeckstreifens, with a cross-sectionally U-shaped Attachment for attachment to a flange of a motor vehicle is provided. The attachment area has a first leg section, a second leg portion and a first leg portion and the second leg portion interconnecting base portion on, which has a provided with an opening Aufsteckkanal form. The attachment area is provided with at least one first retaining lip provided with a holding portion having a free end, and a land portion connected to one of the leg portions is included.

Of Furthermore, the invention relates to a sealing or cover strip for a motor vehicle comprising a cross-sectionally U-shaped Attachment for attachment to a flange of a motor vehicle. The attachment region has a first leg section, a second leg portion and a first leg portion and the second leg portion interconnecting base portion on, which has a provided with an opening Aufsteckkanal form. The attachment area is with at least one first retaining lip provided with a holding portion having a free end, and a land portion connected to one of the leg portions is included.

The EP 0 255 916 B1 teaches a sealing profile for a motor vehicle, which is attachable to a flange. The sealing profile has a slip-on region with a substantially U-shaped cross section. The attachment region consists of a first leg section, a second leg section and a base section connecting the two leg sections. The sections enclose a slip-on channel on three sides. Of the leg portions holding lips protrude into the slip-on, which are inclined to the base portion. After attaching to a flange, the retaining lips wedge and thus increase the peel force. To reinforce the Aufsteckbereichs a reinforcement is provided.

From the DE 36 09 050 A1 It is known to extrude rubber onto a core to produce a sealing profile.

The Invention is based on the object, a method of To simplify the aforementioned type and a seal or To provide cover strips with improved properties.

The The object is achieved by a method having the features of the patent claim 1 and by a sealing or cover strip with the features of claim 11 solved.

advantageous Embodiments of the method are subject of the claims 2 to 10. Advantageous embodiments of the sealing or Abdeckstreifens are the subject of subclaims 2 to 21.

at the process of the invention is a preformed Carrier inserted in an injection mold and with a Elastomer mixture encapsulated, with a retaining lip after injection molding pointing in the direction of the opening of the slip-on channel. The invention Method has the advantage that the first retaining lip from an injection mold is demoldable. In addition, the seal or cover strip ensures an advantageous sealing function, since when attaching the sealing or cover strip on a flange, the retaining lip in the receiving channel is introduced and rests against a flange. This is the reason Retaining lip closer to the flange so that improved Sealing from the transition of the sealing or covering strip to Flange is reached. In addition, the retaining lip can be different adjust strong flange widths, while at the same time the coefficient of friction increased against unwanted removal from the flange. Of Another is a cost effective and easy to carry out Production achieved. The reason for this is that the extrusion line not be occupied. In addition, the carriers do not have more roughened and glued so that the extrudate adheres to them. Likewise, the insertion of the carrier in an injection mold designed easier than its difficult handling in an extrusion line.

Advantageous becomes the first retaining lip with at least one desired kink, preferably provided with two or three desired kinks. This can the first retaining lip advantageous when plugging on a Flange cling to these and thus ensures a advantageous sealing function.

In a further advantageous embodiment, the free end of the projecting first retaining lip after injection from the slip-on channel out. Such a retaining lip allows a more advantageous seal the flange, as it is designed longer and itself thus over a longer distance at the Can create flange.

Of the Aufsteckbereich can advantageously with at least a second retaining lip provided by the second leg portion and / or the Base section protrudes into the slip-on channel. The opposite Retaining lips allow an advantageous fixation of the Sealing or Abdeckstreifens on a flange, since they increase the coefficient of friction.

Advantageous the Aufsteckbereich is reinforced with a carrier, the preferably made of a corrosion-resistant material. Such a Carrier causes increased strength and clamping force of the Aufsteckbereichs and thus ensures a secure attachment the sealing or masking strip on the flange. The usage a corrosion-resistant material causes cracks in the material or sections not covered with material the leg portions or the base portion for durability the sealing or Abdeckstreifens are irrelevant. penetrating Moisture or dirt will destroy the material of the reinforcement Not.

Advantageous the carrier and the slip-on area are firmly bonded connected with each other. This creates a tight bond between created the carrier and the Aufsteckbereich.

Of the Carrier becomes advantageous over at least one connection point connected to the injection mold, wherein the joint after injection molding, free from the injection molding compound is. In addition, the carrier is advantageously partially with the Injection mold, preferably selectively connected to the injection mold. As a result, a secure fixation of the carrier within achieved the injection mold, so that this during of the injection process can not slip and this evenly is overmoulded.

Of the Attachment area can be connected to a sealing area, wherein the sealing region is preferably provided with a hollow chamber becomes. Thus, a desired sealing function may be on ensured the installation of the sealing or Abdeckstreifens become.

Of the inventive sealing or cover strip has the advantage that the first retaining lip from an injection mold is demouldable without this demolish it. In addition allows the retaining lip an advantageous seal of the transition of the Sealing or covering strip on the flange. Furthermore, fits the gasket or cover strips to different flange widths, wherein the retaining lip increases the coefficient of friction against peeling. In addition, the sealing or cover strip is simple and inexpensive produced.

Advantageous is the first retaining lip with at least one predetermined bending point, preferably provided with two or three predetermined kinks.

In a further advantageous embodiment, the free end of the projecting first retaining lip after injection from the slip-on channel out.

Advantageous is the Aufsteckbereich with at least a second retaining lip provided by the second leg portion and / or the base portion protrudes into the slip-on channel.

Advantageous the Aufsteckbereich is reinforced with a carrier, preferably consists of a corrosion-resistant material.

Of the Carrier and Aufsteckbereich are advantageous cohesive connected with each other.

In In another advantageous embodiment, the carrier is over at least one connection point with the injection mold connected, wherein the joint after injection molding is free from the injection molding compound.

Advantageous is the carrier partially with the injection mold, preferably selectively with the injection mold, connected.

Advantageous the Aufsteckbereich is connected to a sealing area, wherein preferably, the sealing area provided with a hollow chamber is.

Of the first leg portion and / or the second leg portion and / or the base portion and / or the first retaining lip and / or the second Retaining lip and / or the sealing area may consist of a elastomeric material, in particular EPDM or TPE exist. These Materials are weather resistant and have the for a sealing or cover strip necessary flexibility on.

The Invention will be described below with reference to embodiments explained in more detail, the only schematic in the accompanying drawings are shown. Show it in detail:

1 a side view of a motor vehicle;

2 a side view of a door of a motor vehicle;

3 a section through a sealing strip according to the invention along the line III-III in 2 ;

4 a cross section of the sealing or Abdeckstreifens invention;

5 a cross section through the attachment area of the sealing or Abdeckstreifens invention;

6 a cross section of the Aufsteckbereichs of the sealing or Abdeckstreifens invention in the plugged state;

7 a schematic representation of a cross section of the sealing or Abdeckstreifens invention with joints and

8th a schematic view of possible embodiments of the joints.

1 shows a motor vehicle 50 that a door 52 having. The door 52 closes an opening of the motor vehicle 50 ,

The door 52 is in 2 shown closer. Along a frame 53 the door 52 runs a sealing or cover strip 10 , the door 52 in the closed state against the rest of the motor vehicle 50 seals.

3 shows a cross section of the weather strip 10 along the line III-III according to 2 , the on a flange 51 is plugged. The weather strip 10 has a slip-on area 20 and a sealing area 40 on.

The attachment area 20 limited on three sides a Aufsteckkanal 29 , These are at the attachment area 20 a first leg portion 26 , a second leg portion 27 and one of the two leg sections 26 . 27 connecting base section 25 intended. The two leg sections 26 . 27 lie on the Aufsteckkanal 29 across from.

The leg sections 26 . 27 and the base section 25 are arranged so that the cross-section of the attachment area 20 is designed substantially U-shaped. On one side, the slip-on channel 29 an opening 30 on. The sealing or cover strip 10 is by means of the opening 30 on the flange 51 put in such a way that the flange 51 in the slip-on channel 29 is recorded.

The first leg section 26 has a first retaining lip 21 on, attached to the flange 51 is applied. The first retaining lip 21 has a holding section 23 and a bridge section 24 on. The bridge section 24 connects the first retaining lip 21 with the leg section 26 , In addition, in the first retaining lip 21 at least one target kink 31 introduced, so that when attaching the sealing or Abdeckstreifens 10 on a flange 51 the first retaining lip 21 at the desired kink point 32 bends and to the flange 51 can cling to.

The second leg section 27 has several second retaining lips 22 on, which is also on the flange 51 issue.

To increase the clamping force and improve the stability of the sealing or Abdeckstreifens 10 is in the attachment area 20 A carrier 28 embedded. The carrier 28 , which can also be referred to as reinforcement, gives the Aufsteckabschnitt 20 Stability and ensures that the retaining lips 21 . 22 with sufficient force to the flange 51 be pressed. It is conceivable the carrier 28 to be provided with a corrosion-resistant coating.

At the attachment area 20 closes a sealing area 40 at. The sealing area 40 has one of an outer wall 41 and the second leg portion 27 limited hollow chamber 43 on. The hollow chamber 43 is filled with air. The wall 41 has a sealing lip 42 on, at the second leg portion 27 opposite side of the hollow chamber 43 is arranged. In the closed state of the vehicle door 52 the sealing area is applied to the vehicle body, thereby sealing the door opening against moisture.

4 shows the seal or cover strip 10 before going to the flange 51 is plugged. The free end 33 protrudes in the direction of the opening 30 of the slip-on channel 29 , The retaining lip 21 but can also be formed such that the free end of the opening 30 protrudes.

In 5 is a schematic view of the Aufsteckbereichs 20 shown, wherein the second retaining lips 22 are shown schematically.

6 shows the attachment area 20 standing on a flange 51 is plugged. It can be seen that the first retaining lip 21 at their desired kink 31 is bent over so that the first retaining lip 21 with her holding section 23 to the flange. Thus, an advantageous seal is guaranteed. The second holding lips 22 also cling to the flange 51 Thus, on the one hand, they increase the sealing function and, on the other hand, they increase the coefficient of friction.

For the production of the sealing or masking strip 10 becomes the carrier 27 placed in an injection mold and with the attachment area 20 So the base section 25 , the leg sections 26 . 27 , as well as the retaining lips 21 . 22 molded. Depending on the desired strength, stiffness and stability, various hybrid forms of these embodiments are conceivable.

According to the 7 becomes the carrier 28 held within the injection mold by spacers. The spacers leave after completion of the overmolding joints 32 in the leg sections 26 . 27 and the base section 25 ,

According to 8th the spacers can be configured differently. Thus, a continuous projection of the injection mold can be designed as a spacer. This results in continuous junction 32 , Another possibility is a support at several points, in which the connection point 32 even only occasionally exist and the carrier 28 uncover. The carrier 28 However, regardless of how the spacers are designed, the weather is exposed by the junction 32 penetration. Such weather influences are, for example, moisture or dirt.

Thus from the connection points 32 no negative consequences for the life of the sealing or masking tape 10 arise, there are two approaches. The first option is to create the resulting joints 32 following the encapsulation of the carrier 28 to close, for example by manual material entry. However, this requires an additional operation.

The second way, long-term consequences for the wearer 28 to prevent, is for the wearer 28 to use a corrosion resistant material. Stainless steel offers great mechanical stability. In applications where it is important to achieve the lowest possible weight, the wearer can 28 also be formed of aluminum or plastic. Carbon fibers are also conceivable as a material.

If the carrier 28 is made of a metal sheet, of the metal sheet in two places, the leg portions 26 . 27 bent so that the intermediate section of the base section 25 forms. A carrier 28 Plastic can be extruded or injection-molded, for example.

The geometry of conventionally arranged in Kederprofilen retaining lips 21 . 22 is difficult to replicate in a pure injection molding process. In particular, the necessary molding would either not be demoulded or the retaining lips 21 . 22 would in the demolding, in which the molded part in a Entformungsrichtung 12 from the slip-on channel 29 is removed, tear off.

The second leg section 27 therefore has only a single first retaining lip 21 on, that of the second leg portion 27 away in the slip-on channel 29 protrudes. Furthermore, the first retaining lip protrudes 21 substantially parallel to the second leg portion 27 in the direction of the opening 30 or from the opening 30 of the attachment area 20 out. This is the way for demoulding in the Entformungsrichtung 12 free.

In the injection molding preferably weather-resistant plastics are used. Especially suitable for sealing or cover strips 10 have proven ethylene-propylene-diene rubber (EPDM) or thermoplastic elastomers (TPE). These materials are weather-resistant and mechanically flexible. Furthermore, flocking on them can also be done easily 45 , for example in the area of the sealing lip 42 to be applied.

The forms of the sealing area shown here 40 are just an example of sealing areas 40 to understand. In particular, it is possible that the sealing area 40 in the area of the base section 25 and / or in the region of the leg sections 26 . 27 to the attachment area 20 followed. It is also conceivable, multi-chamber systems or no hollow chamber 43 provided.

The second holding lips 22 can also be different lengths. So it is conceivable, for example, several short second retaining lips 22 provide and only one of the second retaining lips 22 to extend so that they are the first retaining lip 21 can hold in the bent-in state.

The method according to the invention and the sealing strip or cover strip according to the invention 10 allow easy production of a sealing or masking tape 10 with improved attachment properties. Furthermore, the production in an injection molding process is simplified. By in the direction of the opening 30 protruding first retaining lip 21 is a mold release of all parts of the sealing or Abdeckstreifens 10 , in particular also the second retaining lips 22 , guaranteed.

The sealant or cover strip thus obtained 10 has a Aufsteckkraft largely independent of the flange thickness.

LIST OF REFERENCE NUMBERS

10

Seals or cover strips

12

unmolding

20

attachment area

21

first retaining lip

22

second retaining lip

23

holding section

24

web section

25

base section

26

first leg portion

27

second leg portion

28

carrier

29

Aufsteckkanal

30

opening

31

Target kink

32

junction

33

free The End

40

sealing area

41

wall

42

sealing lip

43

hollow

44

articulation point

45

flocking

50

motor vehicle

51

flange

52

door

53

frame

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• EP 0255916 B1 [0003]
• - DE 3609050 A1 [0004]

Claims (19)

Method for producing a sealing or masking strip ( 10 ), which with a U-shaped in cross section Aufsteckbereich ( 20 ) for mounting on a flange ( 51 ) of a motor vehicle ( 50 ) is provided; the attachment area ( 20 ) a first leg section ( 26 ), a second leg section ( 27 ) and a first leg section ( 26 ) and the second leg section ( 27 ) interconnecting base section ( 25 ), one with an opening ( 30 ) provided Aufsteckkanal ( 29 ), and wherein the attachment area ( 20 ) with at least one first retaining lip ( 21 ), which has a holding section ( 23 ), which has a free end ( 32 ), and a web section ( 24 ) connected to one of the leg sections ( 26 . 27 ); characterized in that the attachment area ( 20 ) is formed by injection molding; wherein the first retaining lip ( 21 ) on the first leg section ( 26 ) is formed, that the free end ( 33 ) towards the opening ( 30 ) shows. Method according to claim 1, characterized in that the first retaining lip ( 21 ) with at least one desired kink point ( 31 ), preferably with two or three predetermined kinks ( 31 ). Method according to one of claims 1 or 2, characterized in that the free end of the first retaining lip ( 21 ) after injection molding from the Aufsteckkanal ( 29 ) stands out. Method according to one of claims 1 to 3, characterized in that the Aufsteckbereich ( 20 ) with at least one second retaining lip ( 22 ) provided by the second leg section ( 27 ) and / or the base section ( 25 ) in the Aufsteckkanal ( 29 ) protrudes. Method according to one of claims 1 to 4, characterized in that the Aufsteckbereich ( 20 ) with a carrier ( 28 ) is reinforced, which preferably consists of a corrosion-resistant material. Method according to one of claims 1 to 5, characterized in that the carrier ( 28 ) and the attachment area ( 20 ) are materially interconnected. Method according to one of claims 1 to 6, characterized in that the carrier ( 28 ) via at least one connection point ( 32 ) is connected to the injection mold, wherein the joint ( 32 ) is free from the injection molding compound after injection molding. Method according to claim 7, characterized in that the carrier ( 28 ) is partially connected to the injection mold, preferably at certain points with the injection mold. Method according to one of claims 1 to 8, characterized in that the Aufsteckbereich ( 20 ) with a sealing area ( 20 ), wherein preferably the sealing area ( 40 ) with a hollow chamber ( 43 ). Sealing or cover strip for a motor vehicle ( 50 ), comprising: a U-shaped mounting area ( 20 ) for mounting on a flange ( 51 ) of a motor vehicle ( 50 ); the attachment area ( 20 ) a first leg section ( 26 ), a second leg section ( 27 ) and a first leg section ( 26 ) and the second leg section ( 27 ) interconnecting base section ( 25 ), one with an opening ( 30 ) provided Aufsteckkanal ( 29 ), and wherein the attachment area ( 20 ) with at least one first retaining lip ( 21 ), which has a holding section ( 23 ), which has a free end ( 33 ), and a web section ( 24 ) connected to one of the leg sections ( 26 . 27 ); characterized in that the attachment area ( 20 ) is formed by injection molding; wherein the first retaining lip ( 21 ) on the first leg section ( 26 ) is formed that the free end ( 33 ) towards the opening ( 30 ) shows. Sealing or cover strip according to claim 10, characterized in that the first retaining lip ( 21 ) with at least one desired kink point ( 31 ), preferably with two or three predetermined kinks ( 31 ) is provided. Sealing or cover strip according to claim 10 or 11, characterized in that the free end ( 33 ) of the first retaining lip ( 21 ) after injection molding from the Aufsteckkanal ( 29 ) stands out. Sealing or cover strip according to one of claims 11 to 12, characterized in that the attachment area ( 20 ) with at least one second retaining lip ( 22 ) provided by the second leg section ( 27 ) and / or the base section ( 25 ) in the Aufsteckkanal ( 29 ) protrudes. Sealing or cover strip according to one of claims 11 to 13, characterized in that the attachment area ( 20 ) with a carrier ( 28 ) is reinforced, which preferably consists of a corrosion-resistant material. Sealing or cover strip according to one of claims 11 to 14, characterized that the carrier ( 28 ) and the attachment area ( 20 ) are cohesively connected to each other. Sealing or covering strip according to one of claims 10 to 15, characterized in that the carrier ( 28 ) via at least one connection point ( 32 ) is connected to the injection mold, wherein the joint ( 32 ) is free from the injection molding compound after injection molding. Sealing or cover strip according to claim 16, characterized in that the support ( 28 ) is partially connected to the injection mold, preferably at certain points with the injection mold. Sealing or cover strip according to one of claims 10 to 17, characterized in that the attachment area ( 20 ) with a sealing area ( 40 ), wherein preferably the sealing area ( 40 ) with a hollow chamber ( 43 ) is provided. Sealing or cover strip according to one of claims 10 to 18, characterized in that the first leg section ( 26 ) and / or the second leg section ( 27 ) and / or the base section ( 25 ) and / or the first retaining lip ( 21 ) and / or the second retaining lip ( 22 ) and / or the sealing area ( 40 ) consist of an elastomeric material, in particular ethylene-propylene-diene rubber or a thermoplastic elastomer.

Images