WO2010086145A1

WO2010086145A1 - Sandwich seal comprising an enlarged top shape

Info

Publication number: WO2010086145A1
Application number: PCT/EP2010/000478
Authority: WO
Inventors: Hubertus Freiherr Von Und Zu Franckenstein; Patrick Freiherr Von Twickel
Original assignee: Neo-Plastic Dr. Doetsch Diespeck Gmbh
Priority date: 2009-01-27
Filing date: 2010-01-27
Publication date: 2010-08-05

Abstract

A seal is described, at least some sections of which have a core (12) made of a hard plastic and a coating (14) made of a comparatively soft plastic. The seal is produced in a sandwich injection molding process. The core (12) is entirely or almost entirely surrounded by the coating (14) that forms at least one sealing lip which has no core or is at least made exclusively of coating on the outer sealing edge. The cross-section of the core (12) and/or the seal has at least one enlarged top section and at least one narrower extension that adjoins the top section.

Description

Sandwich seal with widespread head shape

The invention relates to a seal having at least partially a core made of a hard plastic and a skin made of a relatively soft plastic.

From DE 2 157 015 A1 a seal made of injectable material, in particular plastic or rubber, is known, which has a sealing lip support and a sealing lip, which are manufactured in one piece in a single operation in an injection mold. The sealing lip and the sealing lip support are made of different sprayable materials and are joined together in the hot-plastic state. In this case, the sealing lip carrier may consist of a sprayable material which has a greater rigidity than the material of the sealing lip. The sealing lip support may consist of a sprayable fiber-reinforced material and the sealing lip of a sprayable material without fiber reinforcement. To realize this known seal, the area of the sealing lip support is first separated from the region of the sealing lip by a displaceable partition in an injection mold, and a first injectable material in the region of the sealing lip support and a second injectable material in the region of the sealing lip are injected via separate sprue channels and the dividing wall then removed from the mold. Another possibility for the realization of this known seal is that a sprayable fiber-reinforced material is injected via a single runner into an injection mold, wherein baffles cause in the sprue at least partially segregation of flowing in the region of the sealing lip material.

For the preparation of this known seal so either an injection mold with a partition or an injection mold with bluff bodies is required.

A seal for rolling bearings is known, for example, from DE 1 992 303 U1 or from DE 195 27 340 B4. These known seals each have a sealing body made of an elastic material and a metal body.

A longitudinal seal for a linear guide with a carrier made of a hard plastic and a sealing lip made of a comparatively soft plastic is known from DE 10 2007 008 052 A1 of the applicant. The sealing lip is positively connected to the carrier by at least one Materialverschlaufung.

The invention has for its object to provide a seal with a hard core and surrounding soft skin, which is easy to manufacture and reliable in use as a seal.

The invention solves this problem with the subject matter of claim 1. In this solution according to the invention is a seal having at least partially a core of a hard plastic and a skin of a relatively soft plastic. According to the invention it is provided that the seal with the core and the skin is made by sandwich molding in injection molding. It is provided that the core of the skin is completely or largely completely enclosed, wherein the skin forms at least one sealing lip, which is coreless or at least in its outer sealing edge formed exclusively of skin. In this case, an important feature is that the core and / or the seal in cross-section has at least one widened head portion and at least one subsequent narrower extension portion. Essential in this solution is first of all that the seal has at least partially a core of a hard plastic and a skin made of a relatively soft plastic and that this seal with core and skin by injection molding, in sandwich technique, is made. The terms "a hard plastic core" and "a soft plastic or relatively soft plastic skin" used in the present application mean that in the finished seal, when the plastic is solidified after the injection process, the core is harder than the skin , So the different hardness of skin and core can be achieved by different measures. On the one hand it is possible as a plastic of the skin and as a plastic of the core chemically corresponding to different plastics, for example, to use correspondingly different polymers. On the other hand, it is possible to add additives in the plastics, such as fillers, such as balls, fibers, etc., which give different hardness. The skin on the outside of the seal may form at least one sealing lip, which may be formed without cores or at least in its outer sealing edge exclusively of skin. In the injection molding in sandwich technique is essential that the plastic components are injected as a melt successively into the cavity of the injection mold. In a first step, the

Skin component injected. It then extends progressively in the cavity. In a following step, the core component is injected into the cavity. The core component then proceeds from the skin component at least partially surrounded in the cavity. So at least two components are injected one after the other. It can also be switched from the one component to the other component as a result, i. After the injection of the first component, followed by the injection of the second component, the first component can then be injected again and, if appropriate, then again the second component, etc. In particular, it is possible at the end again, the first

Injecting component in order to obtain a conclusion in the cavity in the injection point with the first component, ie the skin component. Furthermore, embodiments of the method are possible in which more than two Components, e.g. B. three or four different components are injected sequentially.

Essential to the solution according to the invention is, as far as the cross-sectional shape of the gasket is concerned, that the core and / or the gasket, i. the core, together with the skin, has at least one widened head section in cross-section and at least one narrower extension section adjoining it. With the widened head portion of the gasket and / or the core, a reinforced portion of the gasket is obtained. Preferably, the seal in the region of its widened head portion on a core with a corresponding widened head portion. The reinforcement obtained by the widened head portion of the gasket and / or the core is due to the mass accumulation in the widened head portion. The widened core can ensure a secure fixation of the seal on a corresponding carrier component. By the core and in particular by the widened head portion of the core of the fixing portion of the seal receives increased strength, so that a secure hold on the support member in question is possible, in particular for a positive reception in a mounting groove or the like or for the penetration of a fastener, for example a fixing screw.

The tapered extension, which adjoins the widened head section, is suitable for forming a sealing lip section, that is to say the sealing lip can connect as a tapered section to the widened head section. The tapered extension of the core can engage in the connection region of the sealing lip and thus act advantageously on the stability and alignment of the sealing lip.

Preferred embodiments are provided in which the at least one extension section of the core protrudes in a stabilizing manner into the sealing lip, which is formed of skin, moreover. Furthermore, embodiments are provided in which the at least one widened head section of the core and / or the seal is arranged in a fixing section of the seal. Particularly preferred embodiments provide that the core and / or the seal has a substantially dumbbell-shaped section. The core or the seal may have in cross-section two widened head portion, of which at least one as the Kopfabschitt with the narrower

Extension section is formed. This narrower extension section can be designed as a connection section connecting the two head sections. The seal obtained with this dumbbell-like cross section, in particular with this cross section of the core, functional advantages. The one head section can serve as a fixing section for fastening the seal. The other head portion can contribute to the reinforcement of a subsequent sealing lip. By means of the connecting section connecting the two head sections, it is possible to make the seal relatively long in cross-section and to cover a rolling element device and / or a sliding guide device when used in a bearing unit.

In preferred embodiments it is provided that a gating point is arranged on a portion of the seal which has the connecting portion of the core connecting the head portions of the core. Alternatively or additionally, it can also be provided that a Anspritzstelle is disposed on a portion of the seal having the at least one widened, preferably terminal head portion of the core.

In preferred embodiments of claim 1 it is provided that the cross section of the seal in a portion having a widened head portion of the core is thickened.

In particularly preferred embodiments, it is provided that the seal has a base body, on which subsequently the at least one sealing lip is arranged; that the main body is formed of core and skin, wherein it has the entire core or a main part of the core; and in that the at least one sealing lip is embodied without a core or that it is predominantly made of skin, in that only a portion of the core protrudes away from the base body into the connection region of the sealing lip, which is otherwise formed of skin. In preferred embodiments thereof, it may be provided that the shape of the cross section of the main body of the seal of the shape of the

Cross section of the core corresponds, wherein the cross section of the core is only smaller than the cross section of the body.

In particularly preferred embodiments, it is provided that the core has at least one core end penetrating the skin, which passes through the skin to the outside to form a breakthrough and / or narrows the skin penetrates to its edge without the formation of a breakthrough.

In a particularly preferred development, it may be provided that the core end penetrating the skin is formed by a injection point.

Alternatively or additionally, it can be provided here that the core end penetrating the core end is formed by a breakthrough of the core at a material overflow point of the cavity of the injection mold. Alternatively or additionally, it may also be provided that the core end penetrating the skin is formed by a breakthrough of the core in the region of a material confluence point of the skin and / or the core formed in the cavity of the injection mold during injection molding.

The embodiments with the skin-penetrating core end can be realized, in particular, by providing an overflow device in the injection mold for injection molding, with which a material overflow from the cavity is possible, ie the overflow device makes it possible to inject material that has been injected into the cavity remove certain places of the cavity again, in order to control in this way the spread of the injected component in the cavity targeted. Skin component and / or core component can be removed as material overflow via the overflow device. The overflow device is designed as an opening in the mold wall of the cavity. One or more such overflow devices may be formed in the mold wall of the cavity. The opening may be followed by a mold cavity, ie in a sense a separate overflow cavity may be formed in the injection mold preferably adjacent to the cavity forming the seal to be produced. In this overflow cavity, ie overflow shape, several openings that form the overflow device, can open. The overflowing material forms in this overflow form an overflow casting, hereinafter also referred to as overflow bean. The overflow casting is separated after injection molding, ie before or after demolding, similar to the sprue. The

Overflow device may have instead of overflow cavities also at the overflow opening only an adjoining overflow channel, which discharges the overflowing material only from the cavity and forms a rod-shaped overflow casting, which is separated as the rod sprue after or before demolding or demolding.

The overflow device may be in the form of a passive device in the injection mold, i. be formed only as an overflow opening with subsequent overflow mold space or overflow channel. Conceivable, however, are embodiments in which the overflow device is actively formed, i. with an actuatable device, the z. B. may be designed in the manner of a valve to actively open the overflow opening to open and close or to set the opening cross-section actively variable. Additionally or alternatively, the overflow device with a power-operated trigger device, for. B. suction device may be designed to dissipate actively controlled in accordance with the overflowing material.

Via the overflow device, it is possible in each case to control the spread of the skin component and / or the core component in certain areas of the cavity, so that the arrangement and design of the skin and core can be tailored in the respective areas of the cavity. The seals according to the invention are thus seals which, at least in sections, have a core of a hard plastic and a skin of a comparatively soft plastic. It is envisaged that the gasket is made with the core and the skin in sandwich technique and the core of the skin is completely or largely completely enclosed. The sandwich technique is a process whereby the skin material is converted to the core material during injection. The switching process can be done with two coordinated injection sequences of two separate injection cylinders, but it can also be a material stratification in a single injection cylinder, which inevitably and automatically results in the change of material from skin material to core material.

Essential in the application of the sandwich technique is that in a first step, the softer plastic is injected into the cavity of the injection mold and injected in a subsequent second step, the harder plastic in the injection mold, in the already in the cavity of the injection mold plastic softer plastic into or immediately after this. The plastics injected in this way finally fill the cavity completely and solidify to form the sealing body. The harder plastic forms the harder inner core and the softer plastic forms the outer soft skin that surrounds the core completely or largely completely.

In special embodiments, it is provided that the plastic of the core has a greater rigidity than the plastic of the skin, for example, in that the plastic of the core is formed chemically different than the plastic of the skin. Through the choice of plastics, the stiffness of the core and skin can be specifically adjusted. Embodiments are possible in which the plastic of the core and / or the plastic of the skin consists of one or more polymers and the respective polymers are selected accordingly. In this case, embodiments are possible in which both the plastic of the core and the plastic of the skin are composed of a plurality of polymers. The The composition of the plastics can be selected and optimized according to the respective application.

Embodiments are also provided in which the plastic of the core and / or the plastic of the skin have or have fillers as reinforcements, the fillers being formed by fibers and balls. On the nature and design of the fillers and on the concentration of the fillers, a corresponding gain of the plastic can be adjusted. Embodiments are possible in which the core and the skin have or have different fillers and / or different concentrations of fillers. In this case, particularly advantageous embodiments are possible in which the plastic of the skin has no or compared to the plastic of the core only a comparatively small amount of fillers. In this way, the rigidity and hardness of the core or the softness of the skin can be adjusted. Preferred embodiments are possible in which the core and the skin are chemically made of the same plastic, e.g. consist of the same polymers and the different stiffness is formed by the fillers.

It has been found that particularly expedient embodiments are possible if the plastic of the core has a greater rigidity than the plastic of the skin by using different plastic components for this purpose. But it can also be provided that the plastic of the core has fillers as reinforcement. The plastic of the skin has in preferred embodiments either no or only a comparatively small amount of fillers. The fillers may be formed by fibers and / or spheres such as glass fibers, carbon fibers, glass spheres or the like. It is thus possible that in the seal according to the invention, the core and the skin are made of the same plastic. The core and the skin may have different fillers.

For further mechanical stiffening, in the case of the seal according to the invention, the core and / or the skin may be combined with a dimensionally stable support arranged at least largely in the interior of the seal. The dimensionally stable The wearer may be at least partially or completely surrounded by the core or skin. It may be expedient here, if the core and / or the skin with the dimensionally stable carrier materially connected and / or positively connected firmly, for. B. by means of at least one entanglement. Such entanglements are in the above-cited DE 10 2007 008 052 A1 of

Applicant discloses so that it need not be discussed in more detail.

According to the invention, the seal may also be firmly connected to a dimensionally stable, hard structural part arranged at least largely on the outside of the seal. This connection can be realized by positive connection and / or material connection. The dimensionally stable hard construction part can in this case be firmly connected with the skin and / or the core of the seal in a form-fitting or material-locking manner. The connection can z. B. be realized by at least one entanglement.

According to the invention, the seal and the dimensionally stable structural part can be produced by multi-component injection molding.

The advantages achieved by the invention are that the seal by injection molding in sandwich technique two different functional areas, ie a dimensionally stable support region and an elastic sealing region having. Optimal sealing and support properties can be achieved, in particular by using different materials and / or fillers for the skin material and for the core material, by means of the sandwich technique used according to the invention. The sealing area is firmly and permanently connected to the core or carrier area. Unwanted permeabilities between the sealing area determining skin and the core, for example by temperature effects and / or chemicals are avoided. Due to the sandwich technology used, gaskets with very low heights can be realized in a simple manner. The carrier region and the sealing region close to each other almost directly and directly, ie the sealing region can be very close to the carrier region be introduced, whereby the sealing effect is optimally supported. A further advantage is that there is no danger of abrasive effects in the region of the skin having, for example, at least one sealing lip, of the fillers of the core material necessary for the carrier function of the core. It is a clean separation of optimal material for the sealing function and optimal material for the carrier function of the core with an optimal reduction, ie minimum number of components, while avoiding complex construction guaranteed.

In the various versions can be used as plastics all thermoplastically processable molding compositions, eg. Polyamides or thermoplastic elastomers, i. If in the present application of plastics is mentioned, so are all other thermoplastically processable molding compositions includes.

In the various embodiments, it is preferably provided that the core is completely or largely completely enclosed by the skin. In order to obtain a stable connection at material confluence points, in particular in the case of annular sealing elements, it can be purposefully provided that a penetration of the hard plastic of the core through the plastic of the skin is present such that the hard plastic of the core is arranged on the outside of the seal in a locally limited manner, and preferably only on a side facing away from the sealing area of the seal. It can be provided that the breakthrough is at a material confluence point of the plastic of the skin which occurs during production. In the case of annular seals, this locally limited hard plastic region may be present at the outer edge of the seal and the inner edge of the seal may be formed as a soft sealing region, or the arrangement may also be provided vice versa.

Can use the seal according to the invention as a sealing element for various guide devices z. B. linear guides and pivot bearing preferably each with rolling elements. The seal according to the invention can in various warehouses, preferably rolling bearings, use find. These may be bearing devices which may be designed as a pivot bearing or as a linear bearing.

In the rotary bearings can be provided that the sealing element is formed as an annular and / or flat-ring-shaped body and the skin of the radially inner edge of the body and / or the skin of the radially outer edge of the body is designed as the sealing area.

For linear bearings, one or more of the seals may be considered as

Abstreifdichtung be formed. It can be provided in this case that the sealing element is designed as a wiper seal, which has a flat, preferably flap-shaped body which extends parallel to an end face of the carriage and / or perpendicular to the direction of movement of the carriage, wherein the skin of a free edge region of the body a parallel to the direction of movement of the carriage extending surface of the rail is guided transversely to the longitudinal extent of the free edge region of the body slidably.

Furthermore, longitudinal seals can also be used in the linear bearings. It can be provided that the sealing element is formed as a longitudinal seal having a flat, preferably flap-shaped body which extends parallel to the direction of movement of the carriage, wherein the skin of a free edge region of the body on a surface of the rail along the extension direction of the rail and is slidably guided along the longitudinal extent of the free edge region of the body.

In all the embodiments of the rolling bearing can be used as rolling elements balls, cylinder body, needles or other ansich known rolling elements.

Further details, features and advantages will become apparent from the following description of some schematically illustrated in the drawings Formations of the seal according to the invention, it being understood that the invention is not limited to the illustrated embodiments, but is determined by the claims.

Show it:

FIG. 1 schematically shows a cross section through an embodiment of the seal according to the invention,

Figure 2 is a similar to Figure 1 cross-sectional view of a second

Embodiment of the seal, but with modified sealing lip and arranged in the interior of the seal dimensionally stable support,

FIG. 3 shows a perspective view of a third embodiment of the seal according to the invention, likewise with a dimensionally stable support arranged inside, wherein, however, the connecting device is pulled over entanglement,

4 shows a cross section through a fourth embodiment of the seal according to the invention, but connected to an external dimensionally stable hard structural part,

Figure 5 is a perspective view of a portion of the embodiment shown in Figure 4, wherein the connection between the seal and the outermost dimensionally stable hard structural part is shown via entanglement.

6a is a sectional view of an embodiment of a trained as a pivot bearing unit with annular circular seal; Fig. 6b shows a sectional view of an embodiment with a similar structure as in Figure 6a, but with a sectional view through the round seal core and skin pointing;

Fig. 6c is a sectional view of a ring portion of an annular

Round seal with similar construction as in Figures 6a and 6b, sectional plane transverse to the ring plane;

Fig. 7a is a perspective view of an embodiment of a trained as a linear bearing unit, partially cut in

Area of the right part of the carriage;

FIG. 7b shows a detailed representation in region VIIb in FIG. 7a, the cutaway one

Showing longitudinal separation and rolling ball guide;

FIG. 7c shows a detailed representation in the region VIIc in FIG. 7a, showing the cut-off wiper seal;

Fig. 7d is a sectional view of a modified embodiment of a wiper seal;

8a-8f sectional views of six embodiments of a

Carriage with longitudinal seal, wherein the Ausführungsbespiele differ in the fixing device of the longitudinal seal;

Figure 9a is a sectional view of an annular round seal having substantially the same construction as the round seal in Figure 6c, but shown in section plane parallel to the ring plane and with overflow bean.

Fig. 9b is a schematic sectional view of a manufacturing device for injection molding a round seal in sandwich technique with an injection mold with cavity for the rotary seal and one over a Sprue with glanded connective sandwich panel with needle closure and inlet channel for the skin component and inlet channel for the core component, during injection of the skin component;

FIG. 9c is an illustration of the manufacturing device in FIG. 9b, but during the injection of the core component;

10a shows a figure 9a ensprechende representation of an annular ring seal.

Fig. 10b is a figure 9b according to the illustration of a

Manufacturing device for injection molding of an annular round seal during the injection of the skin component, but in contrast to Figure 9b, the gating is not frontally on the outer head portion of the cross section of the seal as in Figure 9b, but centrally between the outer and the inner head portion of the cross section.

FIG. 10c is an illustration of the manufacturing device in FIG. 10b, but during the injection of the core component; FIG.

Figure 11a shows a figure 9a and 10a corresponding representation of an annular round seal, but with no overflow bean is provided and the core is not formed as a closed ring.

Fig. 11b is a representation corresponding to Fig. 10b of a manufacturing device for injection molding an annular round seal during injection of the skin component, but in contrast to Fig. 10b, the cavity has no overflow device;

FIG. 11c is an illustration of the manufacturing device in FIG. 11b, but during the injection of the core component; FIG. Fig. 12a is a sectional view of a longitudinal seal, z. B. for use in a linear bearing in Fig. 7a and 7b, wherein the longitudinal seal on both sides has an overflow bean, cutting plane transverse to the planar plane of extent of the longitudinal seal

12b is a schematic sectional view of a manufacturing device for injection molding a longitudinal seal in sandwich technology with an injection mold with cavity for the longitudinal seal and a connected via a sprue with sprue bush sandwich plate with

The needle valve and inlet channel for the skin component and inlet channel for the core component, with central gating and bilateral overflow device, during injection of the skin component;

FIG. 12c is an illustration of the manufacturing device in FIG. 12b, but during the injection of the core component;

FIG. 13a is a sectional view, corresponding to FIG. 12a, of a longitudinal seal, however, without an overflow bean; FIG.

FIG. 13b shows a representation corresponding to FIG. 12b of a production device for injection molding a longitudinal seal in sandwich technique, during the injection of the skin component, wherein, however, the cavity of the injection mold has no overflow device;

FIG. 13c is an illustration of the manufacturing device in FIG. 13b, but during the injection of the core component; FIG.

FIG. 14a shows a sectional view corresponding to FIG. 13a of a longitudinal seal, but with only one overflow bean and an opposite end-face injection point; FIG. FIG. 14b shows a representation corresponding to FIG. 12b of a production device for injection molding a longitudinal seal in sandwich technique, during injection of the skin component, wherein, however, the gating takes place at the front end and an overflow device is arranged at the opposite front end of the cavity;

FIG. 14c is an illustration of the manufacturing device in FIG. 14b, but during the injection of the core component; FIG.

Fig. 15a is a sectional view corresponding to Fig. 14a of a longitudinal seal, but without overflow bean;

FIG. 15b shows a representation corresponding to FIG. 14b of a production device for injection molding a longitudinal seal in sandwich technique, during the injection of the skin component, wherein, however, the cavity has no overflow device;

FIG. 15c is an illustration of the manufacturing device in FIG. 15b, but during the injection of the core component; FIG.

16a is a schematic representation of the cavity of an injection mold for a wiper seal with the injection mold, each with an overflow device at the front end of the right leg and the left leg of the cavity and central gating, during the injection of the skin component.

Fig. 16b is an illustration of the injection mold in Fig. 16a but during injection of the core component;

Fig. 16c is an illustration of the injection mold in Fig. 16b, but at the end of the injection process; 17a shows a representation corresponding to FIG. 16a of the cavity of FIG

Injection mold for a wiper seal, during the injection of the skin component, but without overflow device at the ends of the two legs of the cavity;

FIG. 17b shows a representation of the injection mold in FIG. 17a, but during the injection of the core component; FIG.

Fig. 17c is an illustration of the injection mold in Fig. 17b, but at the end of the injection process;

FIG. 18a shows a representation corresponding to FIG. 16a of the cavity of FIG

Injection mold for a wiper seal, however, with gating at the front end of the one leg and overflow device at the front end of the other leg of the cavity during the

Injection of the skin component;

18b is a representation of the injection mold in Fig. 18a during the

Injection process of the core component;

FIG. 18c shows a representation corresponding to FIG. 18b, but at the end of the injection process;

Figure 19a is a perspective view of one embodiment of a seal designed as a sealing plug;

FIG. 19b shows a diametrical sectional view of the seal in FIG. 19a in the inserted position as a sealing stopper in an opening of a wall of a component not shown in more detail;

Figure 20a is a perspective view of one embodiment of a gasket designed as a sealing cap; Figure 20b is a diametrical sectional view of the seal in Figure 20a inserted position as a sealing cap in the region of the hub of a non-illustrated roller;

Figure 21a is a sectional view of an outlet of an air supply duct with horizontal and vertical slats as embodiments of the seal;

Figure 21b is a sectional view taken along section line B-B in Figure 21a, showing the vertical lamella alone;

Figure 22a is a front view of a window with a window glass seal as an embodiment of the seal;

FIG. 22b shows a perspective view of a window pane seal cut along section line B-B in FIG. 20a.

FIG. 1 shows, in a cross-sectional representation, an embodiment of the seal 10, which has a core 12 and a skin 14 enclosing the core. The core 12 is made of a hard plastic. The skin 14 consists of an im

Compared to soft plastic. The core 12 and the skin 14 are made in one operation in the, as mentioned above, known per se sandwich technique.

The seal 10 has a carrier region 16 and a sealing region 18. The sealing region 18 is formed as a sealing lip 20, which is integrally away from the carrier region 16. The carrier region 16 is determined by the core 12 made of the hard plastic with regard to its mechanical strength and dimensional stability. The sealing area 18 formed by the sealing lip 20 is determined by the skin 14 of the comparatively soft plastic.

As can be seen, the seal 10 in FIG. 1 forms a body which consists of a core 12 and a skin 14 surrounding the core 12. This body of In the case of the exemplary embodiment in FIG. 1, the seal is subdivided into a substantially rectangular base body and an adjoining sealing lip 20. The basic body of rectangular cross-section represents the above-mentioned carrier region 16. The main body is essentially formed by the core 12, which is rectangular in cross-section accordingly. It is covered by a relatively thin layer of skin 14, wherein, however, the skin is formed as a thicker sealing lip 20 on one short side of the rectangular cross section of the main body. The sealing lip is formed in the embodiment in Figure 1 as a cross-sectionally substantially triangular pin or corresponding bar, which projects at an angle to the short rectangle side of the body cross-section to the outside. The sealing lip is coreless, that is formed exclusively of skin, wherein only in the connection area to the main body of substantially rectangular cross-section core has a connection nose or terminal block, which projects into the sealing lip and there forms a reinforcing region of the sealing lip, which seals the lip in position and strength stabilized.

FIG. 2 illustrates, in a cross-sectional view similar to FIG. 1, an embodiment of the seal 10 with a core 12 made of hard plastic and a skin 14 surrounding the core 12 made of a comparatively soft plastic, in which case the core 12 is combined with a dimensionally stable carrier 22 , That is, the dimensionally stable support 22 is disposed inside the core 12. The dimensionally stable support 22 is formed for example by a sheet metal material.

The reference numeral 16 in Figure 2, the support portion of the seal 10 and designated by the reference numeral 18, the sealing region of the seal 10. In this embodiment in FIG. 2, the elastic sealing region 18 has two sealing lips 20 facing away from one another and a reinforcing bead 24 between them. Also in this embodiment, the body of the seal 10 is divided into a substantially rectangular in cross-section main body consisting of a core, which is covered by a relatively thin skin layer, wherein the skin is formed as a thicker sealing lip 20 in a corresponding manner on the short cross-sectional side of the body is. In contrast to that Embodiment in Figure 1, the sealing lip 20, as mentioned above, not formed as a simple sealing lip, but consists of two mutually remote sealing lips 20, between which a reinforcing bead 24 is formed. Another difference from the exemplary embodiment in FIG. 1 consists in FIG. 2 in that the core has the dimensionally stable carrier 22 in its interior. This dimensionally stable support 22 is completely surrounded by the core when viewed in cross-section.

Figure 3 illustrates in perspective a formation of the seal 10 with a core 12 and a surrounding skin 14. In the core 12 of hard

Plastic is a dimensionally stable carrier 22 is arranged, which is formed with a recess 26 to realize between the core 12 and the dimensionally stable carrier 22 a Schlaufung 28. Incidentally, the seal 10 according to FIG. 3 is designed similarly to the seal 10 according to FIG. 1.

While Figure 3 shows a rectilinear seal 10, which is provided for a linear guide, Figures 4 and 5 show a seal 10 which is annular and is provided for a rolling bearing designed as a rolling bearing. The seal 10 is firmly connected in this case with a dimensionally stable outer construction part 30. The fixed connection is realized for example by entanglements 32, some of which are drawn in the enlarged view in FIG.

The annular seal 10 in Figures 4 and 5 has a core 12 made of a hard plastic and the core 12 enclosing skin 14 of a relatively soft plastic. Also in this embodiment, the core 12 and the skin 14 is made in a known sandwich technique. In the illustrated embodiment, the skin 14 is formed on the radially inner side of the seal with an annular sealing bead 34 which forms the sealing region 18 of the seal 10. The main body consists essentially of a core 12 coated by a relatively thin layer of skin 14. It forms the support region 16, to which the sealing region 18 in the form of a sealing lip immediately adjoins. The main body is relative mechanical strength and dimensional stability determined in particular by the core 12 of the hard plastic. An essential difference from the preceding embodiments of the figures is that in the embodiment in Figures 4 and 5, the core 12 in cross-section is not substantially rectangular, but is composed of a rectangular portion and a widened head portion. The rectangular section is arranged in the base body. The widened head section is arranged in the connection region of the sealing lip projecting into the interior of the sealing lip. This widespread head section stabilizes this radially inner sealing lip with regard to its mechanical strength, shape and position. It is arranged in a relatively wide transition region between the base body and the sealing lip and forms an extension of the rectangular in cross section body, which is received in the receiving ring stage of the outer dimensionally stable structural part 30.

In order to realize the entanglements 32 between the seal 10 and the dimensionally stable construction part 30, the construction part 30 and the support area 16 of the seal 10 have, in the region of the receptacle, a complementary annular step. Due to the fact that the seal is received with its base body there, an overlap region 36 results between the construction part 30 and the seal 10. In this area, the entanglements 32 are formed.

Fig. 6a shows a trained as a pivot bearing unit. In the rotary bearing is a roller bearing 40 having a formed as an outer ring 43 first bearing part and a formed as an inner ring 44 second bearing part, wherein the two bearing parts are guided with the interposition of rolling elements 41 on this guided relative to each other. The rolling elements 41 designed as balls in the exemplary embodiment shown in FIG. 6a are held at a distance by a rolling element cage 42. In the two axial end portions of the outer ring 43 annular annular seals 10r are arranged as rolling bearing seals, wherein the circular seals 10r, as the seals 10 described above produced by sandwiching, through the hard core having formed carrier region and a sealing area formed by the soft skin. This concrete cross-sectional structure of the seal 1Or with core and skin is not shown in the cross-sectional representation in FIG. 6a. In FIG. 6a, however, it is easy to see how the roller bearing seals 10r cover the gap region formed between the outer ring 43 and the inner ring 44. They are inserted in an annular groove in the outer ring 43 and fixed and slide with their designed as a soft sealing region radially inner annular portion on a corresponding end face region of the inner ring 44th

The possible cross-sectional configuration of the annular round seal 10 used in FIG. 6a is shown by way of example in FIG. 6b. Figure 6b shows a pivot bearing, which is constructed in principle the same as the pivot bearing shown in Figure 6a, namely with an outer bearing ring 43 and an inner bearing ring 44 which are rotatable relative to each other, with intermediate rolling balls 41 in a ball bearing cage 42. On both sides of Wälzkugelkäfigs 42 is arranged as an annular round seal 10r roller bearing arranged or inserted respectively in an annular groove in the receiving ring 43. From the cross-sectional view in Figure 6b shows that the seal 10r same as the seals shown in Figures 1 to 5, an inner hard core 12 and an outer softer skin 14 surrounding the core. The cross section shown in Figure 6b of the annular portion of this round seal has a substantially dumbbell-shaped cross section with a radially outer and a radially inner widened head portion and a narrower connecting portion connecting the two head portions. In this in cross-section substantially dumbbell-shaped body of the seal of the corresponding dumbbell-shaped core 12 is arranged. The radially outer widened head portion of the seal forms a fixing portion which is pressed into the annular groove of the outer ring 43 and received in a form-fitting manner. Via the radially outwardly directed tension of the annular seal 10w a firm hold of the fixing portion is obtained in the annular groove, supported by the positive connection of the head portion in the shape of the head portion complementary formed annular groove. In further developments, the annular groove may be formed undercut in cross-section to a latched positive connection to get the seal in the annular groove. It is essential that a correspondingly widespread head section of the core 12 is arranged in the region of the fixing section of the seal. Due to the hardness of the core a solid stable seat in the annular groove is obtained.

At the radially inner end of the cross section, the sealing lip is formed, which, as seen in Figure 6b, is guided in its coreless outer edge region on the inner ring 44 slidably. A significant advantage is obtained in this embodiment of the seal 10r in Figure 6b in that the core 12 extends substantially over the entire cross-sectional length in the seal. The widened radially outer head portion provides for attachment of the fixing portion in the annular groove. The radially inner widened head portion provides reinforcement and stabilization of the annular sealing lip, without the widened head portion protruding into the radially outer skin-made edge of the seal, which forms the sliding sealing lip. The connecting portion of the core, which connects the two widened head portions together, ensures a stable position of the connecting portion of the seal, which covers in this stable position arranged in the ball cage rolling balls against dirt and damage and protects and lubricants and / or oils in the circulation system holds.

Another optimized embodiment of an annular round seal 10r for use in a roller bearing in Figure 6a is shown in Figure 6c. FIG. 6 shows the cross section of a ring section of the round seal 10r. The

Embodiment differs from that in Figure 6b in that with Figure 6c, the sealing lip 20 is formed as a completely coreless extension of the main body of the seal. This coreless tapered extension, which forms the sealing lip in its entirety, is projecting at an acute angle obliquely from the dumbbell-shaped main body of the seal in the cross-section and has over its entire projecting path substantially constant thickness. The sealing lip slides with its radially inner edge on the inner ring 44 when the pivot bearing rotates. The dumbbell-shaped body of the seal points in corresponding wise as the main body in the annular circular seal in Figure 6b a radially inner widened head portion for stabilizing the sealing lip and a radially outer head portion as a fixing portion for receiving in the annular groove. The connecting portion, which connects the widened head portions of the round seal, has a core portion connecting the head portions of the core and is thus able to stabilize the orientation of the seal 10r in the inserted position in the pivot bearing and a secure cover of rolling balls in the Wälzkugelkäfig sure. The circular seal 10r shown in FIG. 6c is thus divided in its cross section into the following sections, which are also shown in FIG. 6c, namely a widened core hub fastening section 16a, a rolling body cover section composed of the narrow core sections 16c and 16b widened core, and a coreless seal portion 18.

The annular round seal shown in Figure 6c has a relatively low height measured perpendicular to the ring plane of the seal. The height is determined by the relevant height of the widened end portions of the seal and may for example be less than 3 mm. The oblique position of the sealing lip relative to the base body of the seal is set in the embodiment so that the sealing lip does not protrude beyond this maximum height.

FIG. 7 a shows a bearing unit designed as a linear bearing 50. The linear bearing 50 is a so-called recirculating ball bearing guide with a first bearing part designed as a guide rail 51 and one

Carriage 52 formed second bearing part, these two bearing parts 51, 52 are guided relative to each other with the interposition of trained as balls rolling elements 41 to this. The guide rail 51 has on both side surfaces in cross-section circular linear guide grooves. According to this, 52 guide grooves are formed on the inner sides of the carriage. They each form a portion of a guide channel for the arranged between the carriage 52 and the guide rail 51 balls 41 of the ball circulation. In the illustrated embodiment is between the Guide rail 51 and the carriage 52 formed on the right side and on the left side in each case a ball screw. In FIGS. 7a and 7b, the carriage 52 is cut open in the region of the right ball circulation, so that the balls 41 can be seen. The right and left recirculating ball are closed by Umlenkendkappen 53 arranged on the guide carriage 52 frontally, wherein on the front end side and on the rear end side of the carriage 52 each such Umlenkendkappe 53 is fixed by screw. These front and rear Umlenkkappen 53 close respectively at the respective end side of the right and the left recirculating ball as common Umlenkendkappe.

This linear guide in Figure 7a has wiper seals 10a and longitudinal seals 101. These will be described in more detail below.

A wiper seal 10a is respectively at the front and at the rear

Front side of the carriage 52 is arranged. The wiper seal 10a is shown enlarged in FIG. 7c. It is flap-shaped in the illustrated case, i. formed substantially flat plate-shaped. It is fixed with its flat side on the respective end face of the carriage 52 lying flat. The contour of its lower edge is complementary to the cross section of the

Guide rail 51 is formed. This lower edge of the Abstreifdichtugn 10 a surrounds the guide rail on its upper side and on its lateral longitudinal sides complementary resting. During the relative movement of carriage 52 and guide rail 51, the resting complementary edge contour slides as sealing area formed over the top and the lateral longitudinal sides of the guide rail 51. The Gleitbewegungsrichtung runs in the manner of a stripping perpendicular to the longitudinal edge of the sealing region forming edge of the wiper seal 10a. During the stripping movement, the wiper seal 10a strips off any dirt particles and liquid or paste-like dirt accumulated on the upper side and the lateral longitudinal sides of the guide rail and holds lubricants, such as fats or oils, in the area of the carriage. The longitudinal seals 101 are in the embodiment also as a flat, lobe-shaped body, that is substantially flat plate-shaped formed. FIG. 7b shows the right-side longitudinal seal 101 in an enlarged view. Both longitudinal sides of the substantially plate-shaped body of the seal are angled. The longitudinal seal lies flat on the underside of the

Carriage 52 and thus engages under the carriage 52. It slides with a designed as a soft sealing area free longitudinal edge over a formed on the lower edge portion of the lateral longitudinal surface of the guide rail 51 below the ball contact surface. This longitudinal edge of the longitudinal seal 101 is formed as a sealing lip 20. The sliding movement of the longitudinal seal 101 extends along the longitudinal edge of this sealing lip 20. The other longitudinal edge of the longitudinal seal 101 is flush with the side surface of the carriage.

The wiper seal 10a and the longitudinal seal 101 are each in

Sandwich technique made. They each consist of a hard core and a soft skin. The fixation of the seal on the front side or bottom of the carriage 52 is effected by cooperation with the hard core of the seal, z. B. by a fastening means which may be formed as a screw, the seal in the region of the hard core passes through or the seal with the hard core is inserted into a holder. The sealing area forms the free edge of the seal by the soft skin of this edge is designed as a sealing lip.

FIG. 7d shows a modified embodiment of the wiper seal 10a. It is designed as a bow-shaped sealing element, which is adapted to the contour of the cross section of the guide rail 51 complementary. The bow-shaped sealing element 10a is formed substantially U-shaped. It has two lateral legs, which are connected to each other via a connecting leg. The lateral legs are each angled in accordance with the contour of the lateral longitudinal surfaces of the guide rail 51. The sealing region of the bow-shaped sealing element 10a is formed along the inner edge of the two lateral legs and the connecting leg as a sealing lip. It can be seen from the cross-sectional illustration in FIG. 7d that a core 12 is also formed in the bow-shaped wiping seal 10a. This is enclosed by the skin 14. The skin 14 forms on the inside of the legs a coreless sealing lip in the outer sealing area. In the illustrated embodiment, it is particularly advantageous that the core 12 extends over the entire length of the bow-shaped sealing element as far as the free front ends of the lateral limbs, and ends only a short distance in front of the end region of the skin. In modified versions, the core end can also penetrate the skin to the outside. This ensures that the legs are stabilized up to the leg end in each case with respect to their shape and orientation by the core. The core also forms a reinforcing and stabilizing portion for the arranged on the entire inner edge of the leg sealing lip, which is coreless in its sealing edge region, ie only consists of the soft skin. The illustrated in Figure 7d

Wiper seal 10a can be arranged and fixed in a housing on the front side of the carriage by the seal 10a is inserted inserted in a corresponding bow-shaped seal receptacle of the housing.

FIGS. 8a to 8f show various possible embodiments of the attachment of longitudinal seals 101 to a corresponding carrier component, such as the guide carriage 52. The respective guide carriage 52 has two opposite receptacles each for a longitudinal seal 101. In the figures, a longitudinal seal 101 is inserted in each case in the left-hand receptacle. In the right-hand photograph no seal 101 is used for better intuition.

In the embodiments of FIGS. 8a to 8e, the longitudinal seal 101 inserted into the receptacle is fixed in each case via an undercut latch, as follows:

In Figure 8a, an undercut longitudinal groove in the vertical boundary surface of the receptacle is formed in the carriage 52. The complementary in the Recording inserted longitudinal seal has in this area a complementarily formed engaging behind strip-shaped projection.

In Figure 8b, an undercut bar is formed in the horizontal base of the receptacle, wherein the complementarily formed

Longitudinal seal in its base has a corresponding undercut longitudinal groove into which engages the bar.

In Figure 8c, the embodiment is corresponding, but just the reverse as in Figure 8b, by the strip-shaped projection on the horizontal base of the longitudinal seal and the undercut complementary receiving groove is formed in the horizontal base of the receptacle.

In the embodiment in Figure 8d, the embodiment is the same as in Figure 8c, in which case, however, the strip-shaped projection and complementary groove are dovetailed.

In FIG. 8e, the embodiment is similar to the embodiment in FIG. 8b. In contrast, in FIG. 8e, only the cross-section of the strip-shaped projection and the groove is not rounded in an arcuate manner, but bent in the manner of a hexagon.

In FIG. 8f, the longitudinal seal 101 arranged in the receptacle is fixed in the receptacle via a fastening screw in that the fastening screw engages through the longitudinal seal through a receiving hole and engages with its threaded end in a threaded hole which is formed in the horizontal base of the seal receptacle.

FIGS. 9, 10 and 11 show the injection molding of ring-shaped circular seals taking place via sandwich technology. The FIGS. 9b, 9c, 10b, 10c and 11b, 11c show the production device and FIGS. 9a, 10a and 11a show the round seal produced in the respective production device. The round seals are annular round seals, preferably for use in pivot bearings with rolling elements, as shown in Figures 6a and 6b in the installed state, in Figure 6c, a cross section of a particularly preferred embodiment is shown. FIGS. 9a, 10a and 11a show the round seals produced in the respective production devices, each in a sectional view with a cutting plane parallel to the plane of the ring. The cross section perpendicular to the ring plane is not shown. It is preferably designed like the cross section illustrated in FIG. 6c.

The following will now be closer to the design and manufacture of

Round seal in Figure 9a received. As can be seen from FIG. 9a, in this embodiment the annular core 12 of the seal is designed as a closed ring. This ring-shaped core is toroidal and surrounded on all sides by skin. In this case, the skin is formed on the radially inner circumference as a sealing lip 20 which projects in a preferred embodiment in cross section of the annular body of the seal obliquely radially inwardly, as such. B. in the embodiment shown in Figure 6c is the case.

It can also be seen in FIG. 9a that at one radially outward point of the annular body of the seal there is a skin made of skin

Overflow formation, hereinafter called overflow bean 11 u, is formed.

This overflow bean 11 u is separated after injection molding, in the same way as the z. B. rod-shaped sprue at the injection point 11g, which is not shown in Figure 9a. He is already separated. After separating the sprue of the injection gate 11g and the overflow bean 11 u is the finished

Obtain round seal, which is optimally designed for use in the pivot bearing as a completely rotationally symmetric ring body.

The injection molding production device shown in FIGS. 9b and 9c comprises an injection mold 110 with an annular cavity 110kv. The

Injection mold 110 is connected via a runner 110g with a so-called sandwich plate 100. The sandwich panel 100 comprises a needle closure device 100n with an outer needle 100na that fits with the needle closure device 100n Inlet passage 100k of the skin component is connected, and an inner needle 100ni, which is connected to the inlet channel 100k of the core component. The inlet channels 100k, 100k are connected to extruders, not shown, which introduce the skin component or the core component as melt into the inlet channel 100k. The inlet channels 100k, 100k and the entire sandwich panel 100 are tempered the same or different.

The needle valve 100n controls the inlet of the skin component and the core component into the injection mold 110. The control of the needle valve 100n is accomplished by controlling the switching movement of the needles 100na, 100ni by machine control and / or the injection pressure of the components. The needle valve device 100n is connected to a sprue bush 100g arranged on the output side of the sandwich plate 100, which is connected to the sprue 110g of the injection mold 110. The injection into the cavity 110kv of the injection mold takes place in the discharge area of the sprue 110g.

A characteristic feature of the sandwich technique of injection molding is that the injection of the skin component and the core component takes place in separate steps in succession, wherein the steps can also overlap in time. In a first step, first the softer component, i. the skin component injected. In a second step, the injection of the harder core component then takes place. It is possible that at the end after the injection of the core component is switched again to the softer skin component in order to obtain a Hautabschluss in the injection port.

Figure 9b shows the device at the inlet of the skin component. The inlet takes place via the open position of the outer needle 100na. The skin component in this first step fills the cavity 110 kv of the injection mold 110 from the

Injection point ago progressing. The injection point is, as shown in FIGS. 9b and 9c, detachably formed on the radially outer side of the cavity 110kv. While the skin component is introduced into the cavity 110kv and in this progressively extends, it adheres to their progress on the mold walls and can already there depending on the temperature of the mold walls more or less solidify. Even before the cavity is completely filled by the skin, the injection is switched to the harder core component.

The core component is then introduced via the same injection into the cavity 110kv. It is in a sense introduced into the skin component coaxially with the skin already partly resting against the mold walls and already more or less frozen there. The core component flows from the skin along its direction of flow. Taking advantage of the

Source flow effect, the cavity is filled, wherein the core component drives the skin component in an already solidified channel of skin component in front of him. Finally, in the end region of the cavity opposite the injection point, the confluence of the skin component takes place. With the confluence of the skin component, a leakage of skin component into an overflow space 110ku, which is formed as an extension of the cavity at this end. For the most part, the confluence of the core component and finally, depending on the process conditions, an exit of the core component into the overflow space 11 Oku. In the overflow space 11 Oku thus forms the so-called overflow bean 11 u, which consists primarily of skin in the case shown. Depending on the process conditions or target direction, the overflow bean may also have an extension of the core. It is essential that a confluence of the core component is achieved due to the targeted confluence and exit of a portion of the confluent area of the skin, whereby the core component is formed as a closed ring.

In the production device of FIGS. 10b and 10c, the production of the annular round seal shown in FIG. 10a takes place. As the comparison of FIG. 10a with FIG. 9a shows, this round seal is of identical design to the seal produced in the production device of FIGS. 9b and 9c. The

Seal in Figure 10a also has a core 12 formed as a closed ring. Significantly responsible for this is the fact that the injection mold 110 of Figures 10b and 10c, a cavity 110kv with a Overflow has 11 Oku. In the same way as described above takes place in the region of the overflow space 11 Oku the confluence and the passage of the skin component and in a corresponding manner as described above, the confluence of the core component to form the closed annular core 12. The only difference to the

Manufacturing device of Figures 9b and 9c is that in the device of Figures 10b and 10c, the injection point is not on the radially outer edge of the cavity, but in a central region of the cross section between the radially outer end and the radially inner end. The advantage of this central gating is that the gating between the two enlarged in cross-section cavities of the cavity, specifically in the narrowed connecting portion between them, so that the components are introduced from the injection directly into both broadened cavities and thus a uniform Filling the two cavities takes place starting from the injection point. In contrast to this, in the case of end-side gating in the device in FIGS. 9b and 9c, the filling progresses progressively from the outer cavity into the narrowed connecting section and then towards the outer cavity. In the terminal gating, the process control is more difficult because it must be prevented that premature solidification takes place in the narrowed connecting portion and thus does not occur the desired filling with skin and core component evenly in the inner cavity.

The manufacturing device of FIGS. 11b and 11c has the same design as that in FIGS. 10a and 10b. The only difference is that the

Cavity 11 Okv has no overflow 11 Oku. In the injection process in this case, the confluence of the skin component, without an overflow of skin component in an overflow space is possible, because such is not present in this injection mold. With the confluence of the skin component takes place in this case at comparable process conditions as in Figure 10a and 10b, a compaction of the skin component in the confluence area. The core component is thereby prevented from forming a closed annular core. It is the in Figure 11a to recognizable core 12 open ring formed. Ring-shaped circular seals with a non-closed ring, as shown in Figure 11a, are generally not desirable when used in rolling bearings, since the running properties and strength is impaired due to the non-annular closed core. However, embodiments are also conceivable in which a non-annular closed core is targeted in an annular seal.

Figures 12 to 15 show the production of longitudinal seals. The longitudinal seals are essentially plate-shaped seals, as they are for. B. can be used in linear bearings. Such a longitudinal seal 101 is shown in Figure 7b in the installed state.

The longitudinal seals 101 injected in the respective production devices of FIGS. 12b, 12c and 13b, 13c and 14b, 14c and 15b, 15c via sandwich technology are shown in FIGS. 12a, 13a. 14a and 15a shown in cross section. They consist of a core 12 and an outer skin 14. The core 12 is similarly plate-shaped as the entire body of the seal formed. It can be seen from the cross-sectional illustration in FIGS. 12a, 13a, 14a and 15a that the skin is designed as a sealing region on both longitudinal sides, specifically that this front longitudinal side is rectangular in cross-section, so that the upper longitudinal edge and the lower longitudinal edge of the front longitudinal side each have one in the Cross-section rectangular sealing lip 20 form. In this case, the front longitudinal side of the core in the different embodiments of Figures 12a, 13a, 14a and 15a is formed differently. In Figure 12a z. B. provided that on both end faces, the core end is tapered in cross-section and the skin passes through at its front end or almost passes through, that reaches to a small distance to the skin end. Thus, the formed on the opposite edges sealing lips 20 are stabilized by the core in terms of alignment, shape and strength. Another embodiment of the front long side is z. B. provided in Figure 13a. In this embodiment, the front end of the core is rounded in the illustrated cross-section, with the rounded end terminating at a distance from the front end of the skin. This allows the subsequent frontal skin as a relatively bulky coreless single or multiple sealing lip to design, which may also be advantageous in special applications as a longitudinal seal.

The design of the front longitudinal side of the seal can be selectively achieved by appropriate manufacturing measures, as shown in connection with Figures 12b, 12c and 13b, 13c and 14b, 14c and 15b, 15c in the following.

A core that extends to the front end of the seal and that only ends or even penetrates the skin immediately before the front of the skin can be achieved by using an injection mold in which the cavity has a corresponding overflow space at the relevant front end. This is shown in the manufacturing device in Figures 12b, 12c. The manufacturing device is the same structure as in the previous figures 9b, 9c; 10b, 10c and 11b, 11c. It has a sandwich plate 100 and a correspondingly connected injection mold 110. The sandwich panel 100 is formed identically as in the aforementioned figures. The injection mold 110 differs from the injection molds there only in that the cavity 110 kv is formed according to the shape of the longitudinal seal 101. The injection molding process is carried out in a corresponding manner as described in connection with the preceding figures.

As can be seen in FIGS. 12b and 12c, the gating takes place centrally between the end faces of the cavity 110kv. At the two end faces of the cavity, an overflow space 11 Oku is formed.

FIG. 12b shows how, in the first step, the skin component is injected into the cavity 110kv and the cavity progressively fills on both sides of the central injection port. The skin progresses along the mold walls in the direction of the front ends. However, before the cavity is completely filled, preferably before the ends are reached, the injection is switched to the core component via the same central injection port. As a result, the core component also spreads on both sides of the central Injection point in the direction of the front ends, within the skin, ie axially enclosed by the partially adhering to the mold walls and in the outer areas already more or less solidified skin. Finally, the skin comes to the confluence at the ends and part of the merged skin exits into the overflow mold 11 Oku. This allows the core to spread to the front end and taper in cross-section extending into the end region of the skin and, depending on the process conditions, possibly the skin at the front even passes through and thus a part of the core enters the overflow space 11 Oku , This condition at the end of the injection process is shown in FIG. 12c.

Instead of only one overflow space 110ku on each of the two front ends of the cavity 110kv, it is also possible for a plurality of overflow spaces 110ku to be arranged side by side along the front end side of the cavity, in order to achieve the most uniform possible shape of the front end of the core over the entire longitudinal extension of the front side. Alternatively, the overflow space 11 Oku may be formed as a correspondingly long extended space at the respective front end of the cavity and the overflow gap extending over the entire length or be connected to some connection points with the cavity.

FIGS. 13b, 13c show a correspondingly constructed production device such as that in FIGS. 12b, 12c. For the production of the seal of FIG. 13a, it is provided in the production device of FIGS. 13b and 13c that the cavity 110kv of the injection mold 110 is, however, formed without front end overflow space 11 Oku. The injection is the same as in the case of Figures 12b and 12c formed centrally, ie between the front ends of the cavity. FIG. 13b shows the manufacturing device during the injection of the skin component. The situation is the same as in FIG. 12b. Figure 13c shows the means for completing the injection of the core component. In FIG. 13c, it can be seen that, in contrast to the embodiment in FIG. 12c, the core is rounded off at the front end and ends at a distance in front of the front end of the skin. The core is therefore not enough to the front of the skin and does not occur through the Skin through. This difference from the situation in FIG. 12c is due to the fact that the cavity 110kv in the device of FIGS. 13b and 13c has no overflow space 11 Oku and thus no escape of the skin component or core component into an overflow space is possible. Instead, at the forehead end confluence of the skin component, the skin in the confluence area compresses, so that the core can not extend to the front end of the skin, but ends at a distance beforehand.

Figures 14b and 14c show the manufacturing device with gating in the region of a front end of the cavity 110kv and with overflow space 11 Oku at the opposite end face. With reference to the longitudinal seal 101 shown in FIG. 14a, as produced in this production device, it can be seen that the front end of the seal facing the gating is of the same design as the front ends of the seal in FIG. 12a. This is due to the fact that the cavity 110kv in FIGS. 14b and 14c has the overflow space 11 Oku at this end point, and thus an overflow of the skin component and possibly the core component occurs at the confluence of the skin, in the same way as in connection with FIG Figure 12c described. The injection point can be seen at the opposite end face of the seal in FIG. 14a, which is an injection point or an injection line, depending on the configuration of the orifice of the sprue 110g. In any case, in the case of FIG. 14a, the core end in the region of the injection point extends through the skin, tapering towards the outside, ie. in cross-section similar to the end of the core at the opposite end of the seal.

In the event that it is desired that the core does not extend to the outside in the region of the injection point, it is possible in the end of the injection process after the injection of the core component to switch over to the skin component again, ie. over a short time at the end of the injection process again

Skin component to be injected in order to obtain a closure through the skin in the area of the injection point. In FIGS. 15b and 15c, in contrast to the device in FIGS. 14b and 14c, no overflow space 11 Oku is formed at the front end of the cavity opposite the injection site. The seal produced in this production device is shown in cross section in FIG. 15a. It can be seen that the end face opposite the injection point is of the same design as the two front ends of the longitudinal seal in FIG. 13a. The design of the front end of the seal is determined by the absence of an overflow space 1 10ku and takes place in a corresponding manner as described in connection with Figure 13b.

Figures 16. 17 and 18 relate to the production of wiper seals. These figures only show the cavity 110 kv of the injection mold 110. The supply of the plastic components to the injection mold 110 also takes place here using a sandwich plate, which may be of the same design as in the production facilities of FIGS. 9 to 15 described above Figures 16 to 18 produced wiper seals 10 a are seals, as they are, for. B. come in linear bearings used. Such a linear bearing is shown by way of example in FIG. 7a. Figure 7c shows a substantially plate-shaped wiper seal 10a in the installed position. Figure 7d shows a bow-shaped wiper seal 10a, as it can be produced in the manufacturing devices shown in Figures 16, 17 and 18.

It is essential in the case of the wiper seals 10a that, in the installed state, the wiping movement takes place transversely to the longitudinal extent of the sealing lip 20. The sealing lip 20 is formed on the inside of the legs, as previously described for the wiper seal 10a in connection with Figure 7d.

In the wiper seals 10a is provided in preferred embodiments, that the core extends into the front end of the legs, as is the case with preferred embodiments of the longitudinal seal 101. This can be achieved during the injection process in that the core component is guided to the flowable end, and thereby that at the relevant front end the cavity 110kv an overflow space 110ku is arranged. The injection process is carried out in the manufacture of the wiper seals 10a also in sandwich technique and in principle the same as in the production of the longitudinal seals 101. In Figures 16a. 16b and 16c, the gating is carried out centrally between the front ends, in the connecting legs on the opposite side of the sealing lip of the connecting leg. The gating takes place in the same way in the device in Figures 17a and 17b. The difference between the production facilities of Figures 16 and 17 is that the cavity 110kv in the device of Figure 16 in the region of the front ends of the legs each have a subsequent overflow space 110ku, while the cavity of the device in Figure 17 has no overflow spaces. FIGS. 16b and 16c show that in the end phase of the injection of the core component, the core extends in the region of the front ends of the legs into the front end of the skin. This is done in a similar manner as in the production of the longitudinal seals 101 in

Compound explained with the figures 12c and 14c. Due to the overflow space 1 10ku takes place at the confluence of the skin an overflow of the skin in the overflow space 11 Oku, at the same time the end of the core extends to the front end of the seal and depending on the process conditions even overflow to a certain extent in the overflow space 11 Oku and thus can reach through the core at the front end of the seal.

Figures 17a and 17b show, in contrast to the figures 16a, 16b and 16c, the formation of a front end, as shown in the longitudinal seals in Figure 13a on both sides and in Figure 15a at an end face. This embodiment with a cross-sectionally round front end of the core, which ends at a distance from the front end of the skin, results from the fact that the cavity 110kv in question has no overflow space 11 Oku.

In FIGS. 18a. 18b and 18c, the production of a wiper seal 10a is shown in which the gating takes place at a front end of the one leg and in which the cavity has an overflow space 110ku at the other end of the leg. The conditions are the same as in the production of the Longitudinal seal in the device of Figures 14b and 14c. It is made with the device in Figures 18a, 18b and 18c, a wiper seal 10a having the injection point at one end and a core at the other end, which may extend to the front end of the skin, ie comparable to the front ends in the production in Figures 16a, 16b and 16c.

In Figures 19a and 19b, another embodiment of a seal produced by sandwich injection molding is shown. The seal is designed as a sealing plug 10s. FIG. 19b shows the stopper 10s in its inserted position in a cylindrical opening in a wall of a component or container, not shown in greater detail. The component or the container may preferably be a component or a container made of plastic or metal. The plug serves to close the opening tight. The plug 10s is formed as a substantially cylinder-hat shaped body. It has a cylindrical portion 10sz and a radially protruding edge 10sr. The cylindrical portion 10sz is closed at the opposite end to the protruding edge 10sr via a closure bottom 10sa. The cylindrical portion 10sz is hollow inside. The radially protruding 10sr is open at the end facing away from the bottom 10sa. The cylindrical portion 10sz has on the outside a bead-like annular collar 10sb, which engages in the inserted position of the plug 10s in a formed in the cylindrical wall of the opening complementary annular groove.

The plug 10s has a hard core 12 surrounded by soft skin 14. The core is formed as a body corresponding to the shape of the plug 10s. The core 12 stabilizes the plug. The radially protruding edge portion 10sr is in sealing contact with the skin of its lower surface on the wall in the area surrounding the opening of the wall. The bead-shaped annular collar 10sb has a correspondingly shaped radially projecting bead-shaped core portion, which supports the engagement and disengagement in the annular groove and the grip in the annular groove. FIGS. 20a and 20b show a further exemplary embodiment of a seal produced by sandwich injection molding. This seal is designed as a sealing cap 10k. Figure 20a shows this cap 10k placed in the installed position, z. B. on the hub of a roller. The cap 10k forms a protective cap, which prevents the ingress of dirt into the covered area, ie in the illustrated case in the hub region of the roller. In the hub region, a rolling bearing can be arranged with rolling elements.

The cap 10k is formed as a body shaped like the plug 10s of Figs. 19a and 19b. The body also has a substantially hat-shaped shape design. It consists, as can be seen in FIG. 19b, of a hard core 12 and a soft skin 14 surrounding the core. The only difference with respect to the plug 10s of FIGS. 19a and 19b is that the cap 10k is not on the outside but on the inside of the cylinder section 10kz has a ring bead 10kb. On the outside of the projecting hub portion on which the cap 10k is mounted, a complementary annular groove is formed. In this annular groove of the annular bead 10kb of the cap 10k engages complementary. Through the protective cap 10k, the hub portion is sealingly covered. The skin 14 formed on the inside of the cap 10k is formed of a soft plastic material. It lies against the outside of the covered hub area and seals with it. The core 14 acts in the cap 10k shown in Figures 20a and 20b in the same manner as in the plug 10s of Figures 19a and 19b.

FIGS. 21a and 21b show an outlet of an air supply shaft with horizontal and vertical blades 10ü. The lamellae represent further embodiments of seals produced in Sandwichspritzgießverfahren. As seen in Figure 21a, the lamellae 10ü are each pivotally mounted in the housing 10üg the outlet about its longitudinal central axis 10üm. In the front section of the outlet, in the illustrated case, horizontal slats 10 u are arranged in a louver-like manner one above the other so as to be pivotably adjustable about their respective horizontal longitudinal central axis 10.. They are connected by a Mitnehmerstab 10ün together and thus simultaneously pivot. Upstream behind a vertical slat 10ü is pivotally mounted around its vertical longitudinal central axis 10üm. It is essential that the fins 10üm each have a flat, in the illustrated case, in plan substantially rectangular lamellar body. The body has a hard core 14 and a soft skin 12 surrounding the core. This skin 12, which forms the edge region of the body, acts as a sealing lip when the lamellae 10 u lie closed against one another or against the housing. As can be seen in FIG. 21b, an axle journal 10üz, which engages in a bearing sleeve in a housing-mounted pivot bearing, is formed on the short end faces of the lamellae 10ü. Instead of the journal 10üz may be formed on the relevant end face of the blade and a bearing bush, in which engages a journal of the housing-fixed pivot bearing, not shown. This bearing design on the end faces of the fins 10ü is stabilized by the core 12 respectively. The core may be formed in this area as penetrating through the skin 14.

FIGS. 22a and 22b show a window in the wall of a building or a vehicle. The window has a window glass seal 10f forming another embodiment of a sandwich injection molded gasket. The seal 10f has two receiving louvers 10fl forming a substantially U-shaped receptacle which receive the edge of the windowpane. The receiving louvers 10fl are formed on the outside of a substantially U-shaped bearing body 10fu of the seal. This bearing body 10fu is used to attach the seal 10f to a stationary profile frame of the window. The U-shaped bearing body 10fu has on the inside at its U-legs opposite double lamellae 10fd, which are pressed onto the stationary profile frame for fixation. This complexly shaped window pane seal 10f can be produced in one piece from plastic in the sandwich injection molding method, namely with a hard core 12 and a soft skin 14 surrounding the latter. The receiving lamellae 10fl are preferably designed in the manner of sealing lips, preferably of soft plastic. The U-shaped bearing body 10fu is mainly formed as a hard core. He only has a thin outer Skin made of soft plastic. The double louvers 10fd on the opposite inner sides of the U-legs are preferably made of hard plastic material or of soft hard-core skin.

In a specific development of the seal 10f, a dimensionally stable carrier 22 can be integrated in the U-shaped bearing body 10fu. It can be arranged and manufactured comparable to the carrier 22 in the embodiment in FIG.

Of the same or similar structure and embodiments of disc seals 10f may be formed for doors or facade elements. In all embodiments, instead of glass panes and disks of other materials, such. As Plexiglas, but also metal, stone and various plastics.

Concerning the production of all embodiments of FIGS. 19 to 22, the principles and measures as described with reference to the production devices of FIGS. 9 to 17 apply.

Finally, it should be noted that the foregoing description, which refers to the figures, is not limited to understand, but it is only the features of the invention as given in the claims, with reference to the figures exemplify.

The following features come as and / or features for further

Specification of the invention in question. With these features, the various feature combinations claimed in the claims can be further specified:

that the seal with the core and the skin are made by sandwich molding by injection molding and the core is completely or substantially completely enclosed by the skin; that the plastic of the core has a greater rigidity than the plastic of the skin, in that the plastic of the core is formed chemically differently than the plastic of the skin;

that the plastic of the core and / or the skin have fillers as reinforcement, wherein the fillers are formed by fibers or balls;

that the core and the skin have different fillers and / or different concentrations of fillers;

that the plastic of the skin has no or compared to the plastic of the core only a comparatively small amount of fillers;

that the core and the skin are chemically made of the same plastic and the different stiffness is formed by the fillers;

that the core and / or the skin is combined with a dimensionally stable carrier arranged at least substantially inside the seal, in that the dimensionally stable carrier is at least partially enclosed by the core and / or by the skin;

that the seal is firmly connected to a dimensionally stable hard structural part arranged at least substantially on the outside of the seal;

that the dimensionally stable hard construction part is firmly connected to the skin and / or the core of the seal in a form-fitting and / or material-locking manner;

that the dimensionally stable support and / or the hard structural part is firmly connected by at least one entanglement with the core and / or the skin; that the gasket and the dimensionally stable hard structural part are produced by multi-component injection molding;

that more than 50% of the weight and / or the volume of the seal is formed by the core;

that the seal is designed as a base body with at least one adjoining the base body sealing lip; that the main body is formed of core and skin, wherein it has the entire core or a main part of the core; that the at least one sealing lip is formed without a core or is formed predominantly of skin, in that only a portion of the core protrudes away from the base body into the connection region of the sealing lip which is otherwise formed of skin;

that the sealing lip is formed with respect to the base body as a tapered extension;

that the sealing lip is designed as an extension protruding from the base body;

that the extension has a substantially constant thickness over the extension of the projection;

that the sealing lip of the body protrudes obliquely angled;

that the sealing lip has at least one peripheral free sealing edge;

that the sealing lip is formed without a core, together with the at least one sealing edge; that the seal is designed as a round seal having an annular base body with radially inwardly and / or radially outwardly annular extending sealing lip;

that the seal is formed as a longitudinal seal having a straight or angled extending plate-shaped or rod-shaped body with at least one longitudinal side extending sealing lip, wherein the sealing lip is formed as a longitudinally sliding sealing lip of the longitudinal seal;

that the seal is designed as a wiper seal, which has a straight or angled extending plate-shaped or rod-shaped body with at least one longitudinal side extending sealing lip, wherein the sealing lip is designed as a cross-sliding sealing lip of the wiper seal;

that at least a portion of the base body having a portion of the core is formed as a fixing portion for fixing the seal to a seal support member;

in that the fixing section is designed as an elastic latching section which can be latched with a complementary section of the seal carrier component engaging behind;

that the gasket has a groove complementarily formed with a projection of the gasket support member, or vice versa, namely that the gasket has a projection complementarily formed with a groove of the gasket support member;

in that the fixing section is designed as a flat plate-shaped section which can be arranged in a form-locking manner in a receiving space formed between a seal carrier component and a lid which can be fixed detachably thereto; that the fixing portion of the seal has a through hole for receiving a fastening element, which is releasably or permanently connected to the seal carrier component or is part of the seal carrier component;

that the fastening element is designed as a screw element;

that at least a portion of the base body having a portion of the core is formed as a shape stabilizing and / or reinforcing portion of the sealing lip adjoining this portion of the base body;

in that at least a portion of the main body having a portion of the core is formed as a cover and protective portion of a rolling element rolling element bearing device or a sliding guide device of a sliding bearing;

that the core has at least one core end penetrating the skin, which penetrates the skin to the outside to form a breakthrough and / or narrows the skin penetrates to its edge without the formation of a breakthrough;

that the skin-penetrating core end is formed by a Anspritzstelle;

that the skin-penetrating core end is formed by a breakthrough of the core at a material overflow point of the cavity of the injection mold;

that the skin-penetrating core end is formed by a breakthrough of the core in the region of a material confluence point of the skin and / or the core formed during injection molding in the cavity of the injection mold;

the skin-penetrating core end is disposed at one end of a substantially elongated cross-section of the gasket; that the skin-penetrating core end is disposed at a central portion of a longitudinal side of a substantially elongated cross-section of the gasket;

that the skin-penetrating core end is formed at a radially outer end of a substantially annular cross section of the seal formed as a round seal;

that the skin-penetrating core end is disposed on a longitudinal edge of the cross-section of the seal designed as a wiper seal;

in that the skin-penetrating core end is arranged on a short end face of the seal designed as a longitudinal seal;

in that at one end of the cross-section of the seal a skin-penetrating core end is arranged, which is formed by a Anspritzstelle, and that at an opposite end of the cross-section of the seal, a skin cross-core end is arranged, which by a breakthrough of the core at a mold exit point is formed;

that at each of two opposite ends of the cross-section of the gasket, a skin-penetrating core end is formed, which is formed by a breakthrough of the core at a mold exit point;

in that a skin-penetrating core end is formed centrally between two opposite ends of the cross-section of the seal, which is formed by an injection point, and in that one of the opposite ends of the cross-section of the seal has a core end penetrating the skin, which is formed at a mold exit point, or both opposite ends of the cross-section of the seal each have a skin-penetrating core end formed at a mold exit site; that the seal and / or the core has a cross section with at least one head section and at least one extension section subsequently narrowing, the head section forming the cross section of the base body and the extension section forming the cross section of the sealing lip;

that the cross section of the seal and / or the core has two widened head portions, of which at least one is formed as the head portion with the narrower extension portion, this narrower extension portion is formed as a connecting portion connecting the two head portions;

that the shape of the cross section of the base body corresponds to the shape of the cross section of the core, wherein the cross section of the core is only smaller than the cross section of the base body;

that a fixing portion of the gasket is formed in a terminal head portion of the cross section of the gasket;

a gating point is formed at a terminal head portion of the cross section of the gasket;

that a gating point is formed at a narrower connecting portion of the cross section of the seal connecting to a head portion;

the gasket is used as a sealing element in a bearing unit, wherein the bearing unit is a bearing with a rolling body device and / or sliding guide device with a first bearing part, a second bearing part and a sealing device, the two bearing parts being interposed with the rolling element device and / or or the sliding guide device are guided on this guided relative to each other, and thereby the

Sealing device seals between the first bearing part and the second bearing part; that the sealing device has at least one sealing element and the sealing element is fixed to one of the two bearing parts in cooperation with the core and is guided in a sliding or non-contact manner with the skin on the respective other bearing part or a part connected thereto so as to move immovably;

that the bearing unit is designed as a pivot bearing and while the first bearing part is formed as an outer ring means and the second bearing part as inner ring means and the sealing element is fixed to the outer ring means or on the interior or both on the outer ring means and on the inner ring means a sealing element is fixed;

that the sealing element is formed as an annular and / or flat ring-shaped body and the skin of the radially inner edge of the body and / or the skin of the radially outer edge of the body is formed as the sealing area;

that the core is designed as a closed ring and that the edge formed as a sealing area surrounds the edge of the core;

that the bearing unit is designed as a linear bearing, wherein the first bearing part is designed as a rail and the second bearing part as a carriage and the sealing element is fixed to the rail or on the carriage or is fixed to both the rail and on the carriage such a sealing element;

in that the sealing element is designed as a wiper seal, which has a flat, flap-shaped and / or flat plate-shaped body which extends parallel to an end face of the carriage and / or perpendicular to the direction of movement of the carriage, wherein the skin of a free edge region of the body on a parallel to the direction of movement of the carriage extending surface of the Rail is slidably guided transversely to the longitudinal extent of the free edge region of the body;

that the sealing element is formed as a longitudinal seal having a flat, lobe-shaped and / or flat plate-shaped body which extends parallel to the direction of movement of the carriage, wherein the skin of a free edge region of the body on a surface of the rail along the extension direction of the rail and along is slidably guided to the longitudinal extent of the free edge region of the body;

that the seal is formed as a sealing plug, which sealingly engages in an opening in a wall of a component or a container and / or sealingly engages over the opening;

in that the sealing plug has a cylindrical plug and / or a radially protruding edge section, wherein it is preferably provided that the cylindrical section has an annular bead;

in that the seal is formed as a sealing cap which forms a projecting portion of a component, e.g. B. a hub area, a roller sealingly engages over;

that the sealing cap has a cylindrical portion and / or a radially protruding edge portion, wherein it is provided that the cylindrical portion has an annular bead;

that the seal is designed as a lamella, preferably sealing lamella and / or closure lamella;

that the seal is designed as a blade of a fresh air or exhaust duct, preferably in the outlet of an air supply shaft; that the lamella is pivotally mounted about its longitudinal axis, preferably longitudinal center axis;

that the lamella has at its end faces in each case a shape as a bearing journal or bearing sleeve, wherein it is preferably provided that the formation is formed primarily of hard core material;

that the seal as a window seal of a window, a door, a

Façade element or the like is formed;

that the disk seal two substantially aligned parallel to each other

Receiving lamellae, which has a cross section in the substantially U-shaped

Forming glass pane or the like disk window receiving space;

in that the window seal has a bearing body on which the

Receiving slats are arranged cantilevered;

that the bearing body is formed as a cross-sectionally substantially U-shaped receptacle for a fixed profile frame of a window, a door, a facade element or the like;

that in the interior of the bearing body a form-stable carrier is arranged, preferably a metal carrier injected in the hard core of the bearing body;

in that the seal is produced by injection molding in an injection mold having a cavity which corresponds to the external shape of the seal using the sandwich technique, the following steps take place: a) skin component is injected into the cavity of the injection mold in the region of an injection location in such a way that the Skin component in the cavity progressively extends; b) in the cavity containing the skin component of the injection mold core component is injected so that the core component of the Skin component at least partially surrounded in the cavity progresses; c) a part of the skin component and / or core component received in the cavity passes over into an overflow device arranged adjacently in an area of the mold wall of the cavity as material overflow;

that after step b) and / or step c) skin component is injected in such a way that in the region of the injection site in the cavity skin component is arranged;

that the overflow device receives skin component in the region of a confluence of the skin component and / or that the overflow device receives core component in the region of a confluence of the core component;

that in the overflow device core component to form a breakthrough of the core emerges through the voltage applied to the mold wall skin;

that the overflow device is arranged at a distance from the injection location;

that the overflow device and the injection location are arranged at opposite ends of the cavity of the injection mold;

in each case an overflow device is arranged at two opposite ends of the cavity, and the injection location is preferably arranged in a region of the cavity between these opposite ends;

that the injection site has one or more injection points in the region of the mold wall of the cavity;

that the overflow device has an overflow shape or a plurality of overflow shapes adjacent to a molding surface of the cavity of the injection mold; that the skin component is injected into the cavity of the injection mold via the same injection location as the core component;

in that an overflow device is disposed adjacent to one end of the cavity of the injection mold to form a round seal, which accommodates the confluence of the skin component to allow confluence of the core component to form a closed core;

that the injection location is formed in a region of the cavity which is arranged between two enlarged cavities of the cavity;

the cavity of the injection mold of a longitudinal seal and / or a wiper seal has at least one overflow device at a front end remote from the injection location, which constitutes a flow end of the skin component and / or the core component.

5!

Bezuqsziffernliste:

10 seal

1 Or round seal

10a wiper seal

101 longitudinal seal

10s sealing stopper

10sz cylinder section

10sr radially projecting edge portion

10sb outside ring collar

10sa graduated floor

10k sealing cap

10kz cylinder section

10kr radially projecting edge portion

10kb inside ring collar

10ka coverlet

10μ lamella

10üm central longitudinal axis

10g housing

10ün takeaway

10üz axle journal

1 of window sill seal

1OfI receiving lamella

10fu bearing body

10fd double lamella

11g injection point

11 u overflow bean

12 core (out of 10)

14 skin (out of 10)

16 carrier area (out of 10)

16a fixation area

16b gain area

16c connection area 18 sealing area (from 10 to 16)

20 sealing lip (from 18)

22 dimensionally stable carrier (from 10 in 12)

24 reinforcing bead (between 20 and 20) 26 recess (in 22 for 28)

28 entanglement (between 12 and 22)

30 dimensionally stable construction part (for 10)

32 entanglement (between 30 and 10)

34 Sealing bead (for 18) 36 overlap (between 30 and 16) 40 pivot bearing

41 rolling elements

42 rolling element cage

43 outer ring

44 inner ring 50 linear bearing

51 guide rail

52 carriages

53 Deflection / end cap 100 Sandwich plate 100g sprue bushing

100u needle device

100na hollow outer needle

100ni massive inner needle

100k inlet channel skin component 100k inlet channel core component

110 injection mold

110g sprue

HOkv cavity

110ku overflow space

Claims

claims

A seal comprising, at least in sections, a core (12) made of a hard plastic and a skin (14) made of a relatively soft plastic, characterized in that the seal with the core (12) and the skin (14) through

Sandwich technique injection molding is made; that the core (12) is completely or substantially completely enclosed by the skin (14), wherein the skin forms at least one sealing lip, which is formed without cores or at least in its outer sealing edge exclusively of skin; that the core (12) and / or the seal has in cross-section at least one widened head portion and at least one adjoining this narrower extension portion.

2. A seal according to claim 1, characterized in that the at least one extension portion of the core (12) in the rest of the skin (14) formed sealing lip (20) protruding stabilizing.

3. Seal according to claim 1 or 2, characterized in that the at least one widened head portion of the core (12) and / or the seal is arranged in a fixing portion of the seal.

4. Seal according to one of the preceding claims, characterized in that the core (12) and / or the seal in cross section has two widened head portions, of which at least one is formed as the head portion with the narrower extension portion, said narrower extension portion as a connecting the two head portions

Connecting portion is formed.

5. A seal according to claim 4, characterized in that a Anspritzstelle is arranged on a portion of the seal having the connecting the head portions of the core (12) and the seal connecting portion of the core (12) and the seal.

6. Seal according to one of the preceding claims, characterized in that a Anspritzstelle is arranged on a portion of the seal having the at least one widened, preferably terminal head portion of the core or the seal.

A seal according to any one of the preceding claims, characterized in that the cross-section of the seal is thickened in a portion having a widened head portion of the core.

8. Seal according to one of the preceding claims, characterized in that the seal has a base body, on which then the at least one sealing lip (20) is arranged; that the main body of core (12) and skin (14) is formed, wherein it has the entire core (12) or a main part of the core (12); and that the at least one sealing lip (20) is formed coreless or that it is formed predominantly of skin (14) by only a portion of the Kerns (12) protrudes away from the body in the connection area of the rest of skin (14) formed sealing lip (20).

9. A seal according to claim 8, characterized in that the shape of the cross section of the base body of the seal (10) corresponds to the shape of the cross section of the core (12), wherein the cross section of the core (12) is only smaller than the cross section of the base body.

10. A seal according to one of the preceding claims, characterized in that the core (12) has at least one core penetrating the core end, which passes through the skin (14) to the outside to form a breakthrough and / or narrows tapering the skin into her Edge without training penetrated a breakthrough.

11. A seal according to claim 10, characterized in that the skin (14) by cross-core end is formed by a Anspritzstelle.

12. A seal according to any one of claims 10 or 11, characterized in that the skin cross-core end is formed by an opening of the core at a material overflow point of the cavity of the injection mold.

13. Seal according to one of claims 10 to 12, characterized in that the skin by cross-core end by an opening of the

Kerns is formed in the region of a formed during injection molding in the cavity of the injection mold Materialzusammenflußstelle the skin and / or the core.