Valve base assembly, method for manufacturing a valve base assembly, inner tube for a tire and method for manufacturing an inner tube

Abstract

The invention relates to a valve base arrangement for an inner tube of a tire, in particular for an inner tube for a bicycle tire, comprising a valve base that can be connected to an inner tube, a tubular valve stem that is connected to the valve base, wherein the valve stem is inserted into a through-opening of the valve base, wherein the valve stem is made of metal, wherein the valve base has an outer part with a dome-shaped attachment and a plate-shaped fastening part for attaching to the inner tube, and wherein a reinforcing sleeve is arranged in the dome-shaped attachment, which defines the through-opening of the valve base for inserting the valve stem.

Description

[0001] The invention relates to a valve base assembly for a tire tube, in particular for a bicycle tire tube, comprising a valve base that can be connected to a tube, a tubular valve stem that is connected to the valve base, wherein the valve stem is inserted into a through-opening of the valve base, and wherein the valve stem is formed from metal. The invention also relates to a method for producing a valve base assembly according to the invention. The invention further relates to a tire tube, in particular a bicycle tire tube. Finally, the invention relates to a method for producing a tube according to the invention.

[0002] German patent DE 10 2018 202 798 B4 discloses a method for producing a toroidal bicycle tube made of a thermoplastic polymer. The ends of a tube section are welded together using laser light to produce a toroidal tube.

[0003] The invention is intended to improve a valve base assembly, a method for producing a valve base assembly, a tube for a tire and a method for producing a tube.

[0004] According to the invention, a valve base assembly having the features of claim 1, a method for producing a valve base assembly having the features of claim 15, a tube for a tire having the features of claim 22, and a method for producing a tube having the features of claim 24 are provided. Advantageous developments of the invention are mentioned in the respective subclaims.

[0005] A valve base assembly for a tire tube, in particular for a bicycle tire tube, comprises a valve base connectable to a tube and a tubular valve stem connected to the valve base. The valve stem is inserted into a through-opening of the valve base, and the valve stem is formed from metal. The valve base has an outer part with a dome-like attachment and a plate-like fastening part for fastening to the tube. A reinforcing sleeve is arranged in the dome-like attachment, which defines the through-opening of the valve base for inserting the valve stem.

[0006] By providing an outer part and a reinforcement sleeve, a secure attachment of the valve base to a hose can be achieved, while the reinforcement sleeve can also ensure a stable and airtight attachment of the valve stem to the valve base. For example, the outer part can be made of a very lightweight material that connects easily to the hose, while the reinforcement sleeve is optimized for securing the valve stem.

[0007] In a further development of the invention, the valve base is formed at least in sections from thermoplastic polymer (TPU) and the valve stem is formed from metal.

[0008] A metal valve stem is highly mechanically resilient and ideally suited to accommodating a valve for inflating a tire. A thermoplastic polymer valve base can be reliably and airtightly connected to a thermoplastic polymer tube. A common metal for manufacturing valve stems is brass.

[0009] In a further development of the invention, the valve base is made of a light metal, in particular aluminum.

[0010] A valve base made of light metal, especially aluminum, has considerable weight advantages over a valve stem made of brass, but like a valve stem made of brass, it can still be attached to the valve base in a process-safe, reliable and airtight manner.

[0011] In a further development of the invention, the outer part is formed from thermoplastic polymer and the reinforcing sleeve is formed from fiber-reinforced plastic, in particular fiber-reinforced thermoplastic polymer.

[0012] The outer part, made of a thermoplastic polymer, can be both very lightweight and designed to be easily and reliably airtightly connected to the hose, which may also be made of a thermoplastic polymer. The reinforcement sleeve, on the other hand, is made of fiber-reinforced plastic to reliably attach the valve stem to the valve base in an airtight and mechanically stable manner. For example, the reinforcement sleeve can be made of glass-fiber-reinforced plastic, particularly fiber-reinforced thermoplastic polymer.

[0013] In a further development of the invention, the valve stem has a circumferential projection which rests on an upper side of the dome-like attachment.

[0014] Such a circumferential projection can, on the one hand, define a relative position of the valve stem to the valve base and, in addition, can also ensure a reliable seal between the valve stem and the valve base as well as a reliable mechanical fastening.

[0015] In a further development of the invention, a sealing ring is arranged between an underside of the circumferential projection and the upper side of the dome-like attachment.

[0016] In this way, a reliable seal can be achieved between the valve base and the valve stem.

[0017] In a further development of the invention, the circumferential projection has, at its end facing the valve base, a circumferential recess for receiving the sealing ring in sections.

[0018] In this way, a position of the sealing ring relative to the valve stem can be defined and a reliable seal by means of the sealing ring is ensured.

[0019] In a further development of the invention, the dome-like attachment tapers towards the first end of the valve stem.

[0020] In a further development of the invention, the valve stem has a first end for installing a valve and a second end which projects beyond the through opening in the valve base, wherein the valve stem is flanged at the second end in the direction of the valve base.

[0021] By flanging, the valve stem can be mechanically and securely anchored to the valve base. The valve stem then rests against one upper side of the valve base, particularly with a circumferential projection, and at its second end, the flanging preloads the circumferential projection against the valve base. This not only creates a highly mechanically stable connection, but also an airtight one.

[0022] In a further development of the invention, the valve stem in the area which is inserted into the reinforcing sleeve has a circumference which deviates from a circular shape, in particular a polygonal, hexagonal, octagonal or polylobular circumference.

[0023] By means of a circumference that deviates from a circular shape, the valve stem can be connected in a way that is mechanically highly resilient in the direction of rotation, i.e. in and opposite to the direction in which a valve is screwed into the valve stem and / or a dust cap is screwed onto or unscrewed from the valve stem. In particular, the valve stem is cylindrical in the area that is inserted into the reinforcement sleeve and thus deviates from a circular shape, i.e., cylindrical and polygonal or cylindrical and polylobular. A polylobular design refers to a design that consists of several areas with a rounded outer circumference, which in turn are connected to one another by rounded areas with a smaller radius.For example, a trilobular perimeter can be chosen, in which three equally long regions have convexly curved outer edges, which are then connected by three narrower regions with a smaller radius of curvature, also convexly curved. A polygon or triangle can be considered trilobular or polylobular if it has convexly curved outer edges and the outer edges are each connected by rounded regions, also convexly curved outwards.

[0024] In a further development of the invention, the reinforcing sleeve has an inner circumference that deviates from a circular shape, in particular polygonal, hexagonal, octagonal or polylobular.

[0025] In a further development of the invention, the valve stem is held in the reinforcing sleeve by means of a press fit in the area in which it is inserted into the reinforcing sleeve.

[0026] In this way, a mechanically stable and airtight connection between the valve stem and the valve base can be achieved.

[0027] In a further development of the invention, the reinforcing sleeve has an internal thread and / or the valve stem has an external thread in the area which is inserted into the reinforcing sleeve.

[0028] In this way, the valve stem can be secured by simply screwing it onto the reinforcement sleeve of the valve base.

[0029] In a further development of the invention, the valve stem is designed in the area in which it is inserted into the reinforcing sleeve so that it tapers conically towards the second end.

[0030] The object underlying the invention is also achieved by producing a valve base arrangement according to the invention, in which a second end of a valve stem is inserted into a through opening in the valve base.

[0031] In a further development of the invention, the second end of the valve stem is flanged, in particular in the direction of the valve base.

[0032] In a further development of the invention, the second end of the valve stem is beaded radially outwards by 90°.

[0033] In a further development of the invention, the end region of the valve stem adjoining the second end is widened outwards in a radial direction.

[0034] In this way, a mechanical connection to the valve base, and in particular to the valve base's reinforcement sleeve, can be designed to withstand greater loads. Furthermore, airtightness can be achieved.

[0035] In a further development of the invention, the conical widening of the end region of the valve stem, which adjoins the second end, is provided.

[0036] In a further development of the invention, simultaneous flanging and widening is provided.

[0037] In a further development of the invention, the flanging and widening is carried out by inserting a mandrel into the second end of the valve stem.

[0038] The object underlying the invention is also achieved by a tube for a tire, in particular a tube for a bicycle tire, wherein the tube consists of thermoplastic polymer and wherein a valve foot arrangement according to the invention is connected to the tube, wherein the valve foot of the valve foot arrangement is welded to an outer side of the tube.

[0039] A welded joint creates a mechanically highly resilient yet airtight connection between the valve base and the outside of the hose. The weld is preferably achieved using laser light. Laser welding can be carried out reliably. Short cycle times can be achieved in series production.

[0040] In a further development of the invention, the hose and the valve base are welded by means of a laser, wherein the hose is formed from a thermoplastic polymer that is transparent to the laser light used, and wherein at least the outer part of the valve base is formed from a thermoplastic polymer that absorbs the laser light used.

[0041] When the hose and valve base are irradiated with a laser, with the outer side of the hose resting against the valve base, the laser light can penetrate the hose without the hose material heating up too much. The material of the valve base, on the other hand, is heated up much more than the hose material and melts, creating a welded joint between the valve base and the outer side of the hose. The hose, which is made of a very thin thermoplastic polymer in particular, can therefore be reliably joined to the valve base, which is made of a somewhat thicker material in particular, without there being any risk that the laser light will heat the hose material so much that it melts throughout and becomes perforated.

[0042] The object underlying the invention is also achieved by a method for producing a hose according to the invention, in which the welding of a valve base to an outer wall of the hose is carried out by means of laser light.

[0043] In a further development of the invention, the hose is placed on an underside of the valve base facing away from the first end of the valve stem, so that two material layers of the hose material lie against one another, and the underside of the valve base is exposed to laser light through the two material layers.

[0044] This allows the valve base and hose to be joined together reliably. The laser light primarily heats only the material of the valve base, eliminating the risk of the two overlapping layers of hose material sticking together or even welding during laser irradiation.

[0045] In a further development of the invention, the laser light is focused on the underside of the valve base.

[0046] Only the valve base is exposed to the very high energy per area of ​​the focused laser beam, whereas the superimposed material layers of the hose material are penetrated by the not yet so strongly focused laser light and are therefore heated to a lesser extent.

[0047] Further features and advantages of the invention will become apparent from the claims and the following description of a preferred embodiment of the invention in conjunction with the drawings. In the drawings: Fig. 1 is a partial sectional view of a tube according to the invention for a bicycle tire, the sectional plane passing through a valve base arrangement, Fig. 2 a side view of a valve base arrangement according to the invention during an intermediate step of assembly, Fig. 3 a view of the section plane AA in Fig. 2, Fig. 4 a plan view of the valve base arrangement of the Fig. 2, Fig. 5 a view of the section plane BB in Fig. 4, Fig. 6 a sectional view of the valve base arrangement according to the invention during a further intermediate step of assembly, Fig. 7 a sectional view of the valve base assembly during a further intermediate step of assembly and Fig. 8 a sectional view of a hose according to the invention when connected to a valve foot assembly.

[0048] Fig. Figure 1 shows a section of a tube 10 for a tire according to the invention. According to the illustrated embodiment, the tube 10 is intended for a bicycle tire. The tube 10 has a toroidal tube element 12 made of a thermoplastic polymer. The tube element 12 is made of a single piece of tube with two ends, the two ends being welded together in an airtight manner, in particular as described in German patent DE 10 2018 202 798 B4.

[0049] A wall of the hose element 12 has a through-opening 14, which is punched out, for example, and through which access to an interior 16 of the hose is created. A valve base assembly 20 according to the invention is placed on the outer wall of the hose element 12 and is connected airtight to the outer wall of the hose in such a way that access to the interior 16 of the hose element 12 is thereby created via the through-opening 14. The valve base assembly 20 has a valve stem 22, which is provided with a through-opening. The interior 16 of the hose element 12 can be filled with air or other gas and emptied again via the valve stem 22. At a Fig. 1, a valve is provided in the usual way at the upper end of the valve stem 22, not shown.

[0050] The valve foot assembly 20 has a valve foot 24 connected to the valve stem 22. The valve stem 22 is connected to the valve foot 24 in an airtight manner, and the valve foot 24 is in turn connected to the outside of the hose 12 in an airtight manner and is arranged such that the through-opening of the valve stem 22 opens above the through-opening 14 in the hose element 12.

[0051] The valve base 24 has an outer part 26 with a dome-like attachment 28 and a plate-like fastening part 30. A Fig. 1 The lower side of the plate-like fastening part 30 is hermetically connected to the outside of the hose element 12. The dome-like attachment 28 is formed integrally with the plate-like fastening part 30 and protrudes from the plate-like fastening part 30. A reinforcing sleeve 32 is arranged in the dome-like attachment 28 and extends over the entire height of the outer part 26. Fig. 1 The lower side of the reinforcement sleeve 32 thus rests against the edge of the through-opening 14 on the outside of the hose element 12.

[0052] A through-hole in the valve base 24 is formed by means of the reinforcing sleeve 32. The valve stem 22 is inserted into this through-hole with its second end, which is in Fig. 1 is inserted below. A first end of the valve stem 22, opposite the second end, is in Fig. 1 not shown. A valve, for example, is inserted into the first end (not shown).

[0053] In the illustrated embodiment, the valve stem 22 is made of aluminum and has an external thread in a first region extending from the first end. A nut, for example, can be screwed onto the external thread to secure the valve stem against displacement on a radially inner surface of a rim. Fig. 1 The first end (not shown) can be used to screw on a dust cap, for example.

[0054] The valve stem 22 has a circumferential projection 34 that rests on an upper side of the dome-like attachment 28. Consequently, the valve stem 22 can only be inserted into a through-opening in the valve base 24 until an underside of the circumferential projection 34 rests on an upper side of the valve base 24.

[0055] The circumferential projection 34 is on its underside, which is Fig. 1 facing the valve base 24, is provided with a circumferential groove 36 into which a sealing ring 38 is inserted. In the finished state of the hose 10, the sealing ring 38 is pressed together between an upper side of the reinforcing sleeve 32 and the circumferential projection 34 of the valve stem 22. The sealing ring 38 thereby hermetically seals a connecting surface between an underside of the circumferential projection 34 of the valve stem 22 and an upper side of the valve base 24.

[0056] At its second end, which is in Fig. 1 below, the valve stem 22 is widened outwards and additionally flanged radially outwards by 90°. The valve stem thus penetrates somewhat into the material of the reinforcing sleeve 32 in the region of the second end and in an area immediately adjacent to the second end. The valve stem 22 is thus secured to the reinforcing sleeve 32 in a manner capable of withstanding high mechanical loads, and the connection between the valve stem 22 and the valve base 24 can thus also be made airtight. The reinforcing sleeve 32 is in turn firmly connected to the dome-like attachment 28. The reinforcing sleeve 32 can be integrally connected to the outer part 26, for example, by being glued. Advantageously, however, the valve base 28 is manufactured using a two-component injection molding process, with a first component forming the outer part 26 and a second component forming the reinforcing sleeve 32.

[0057] The outer part 26 is made of thermoplastic polymer (TPU) and can thus be connected to the outside of the hose element 12 by means of a welded joint, for example by laser welding. The reinforcement sleeve 32 is made of fiber-reinforced plastic, for example fiber-reinforced thermoplastic polymer. The reinforcement sleeve 32 can be connected to the outer part 26, for example, by manufacturing the outer part 26 and reinforcement sleeve 32 as a single piece in a two-component injection molding process. In any case, a connection between an outer side of the reinforcement sleeve 32 and an inner wall of a through-opening in the dome-like attachment 28 of the outer part 26 is hermetically sealed. The outer part 26 is made of soft TPU with a Shore hardness between 70A and 90A. The reinforcement sleeve 32 is made of a harder material with a Shore hardness between 60D and 90D.

[0058] It is in Fig. 1 shows that the second end of the valve stem 22 is not only beaded by 90°, but is also conically widened. This further improves the airtightness and the mechanical connection between the valve stem 22 and the valve base 24.

[0059] Before assembly, the section of the valve stem 22 which is in Fig. 1 is located below the circumferential projection 34, is cylindrical and has a diameter that is slightly larger than the inner diameter of the reinforcing sleeve 32. The section of the valve stem 22 below the circumferential projection 34 is consequently pressed into the reinforcing sleeve 32, so that a press fit is present between the reinforcing sleeve 32 and the valve stem 22. This is shown in Fig. 1 by a narrow overlap between an outer wall of the valve stem 22 and an inner wall of the reinforcing sleeve 32.

[0060] Fig. 2 shows a side view of the valve base assembly 20 during an intermediate step of the assembly of the valve base assembly 20. The valve stem 22 has already been inserted a little way into the through-opening of the valve base 24, so that the lower, second end of the valve stem 22 is in Fig. 2 is hidden. Fig. 2 shows that a section 40 of the valve stem 22 located below the circumferential projection 34 of the valve stem 22 is cylindrical.

[0061] It is in Fig. 2 already indicated that the circumference of section 40 deviates from a circular shape.

[0062] Fig. 3 shows a view of the section plane AA in Fig. 2. In this sectional view, it can be seen that the outer circumference of section 40 of the valve stem 22 is octagonal. The inner circumference of section 40, however, is circular. Section 40 is pressed into the through-hole of the reinforcement sleeve 32. In any case, when pressed in, the inner wall of the through-hole of the reinforcement sleeve 32 also acquires an octagonal circumference. However, the through-hole of the reinforcement sleeve 32 can also be octagonal. As explained, section 40 of the valve stem 22 is anchored in the through-hole of the reinforcement sleeve 32 by means of a press fit.

[0063] The section plane AA runs through the dome-like attachment 28 of the outer part 26 of the valve base 24.

[0064] Fig. 4 shows a plan view of the valve base assembly 20 of the Fig. 2, i.e. during an intermediate step of the assembly and before the section 40 of the valve base 22 is pressed into the through hole of the valve base 24. In the view of the Fig. 4 shows the first, upper end of the valve stem 22, into which a valve can be inserted, as well as the circumferential projection 34.

[0065] Fig. 5 shows a view of the section plane BB in Fig. 4. The section 40 of the valve stem 22 has already been pressed a certain distance into the through-hole of the valve base 24 and thus into the through-hole of the reinforcement sleeve 32. In Fig. 5 it is indicated that the outer diameter of the section 40 is slightly larger than the inner diameter of the reinforcing sleeve 32. As can be seen from the Fig. 2 and Fig. 3, the outer circumference of section 40 of the valve stem 22 deviates from a circular shape and is octagonal in the illustrated embodiment. In the illustrated embodiment, the inner circumference of the reinforcing sleeve 32 is circular before the section 40 of the valve stem 22 is pressed in, see Fig. 5.

[0066] On an underside of the circumferential projection 34 of the valve stem 22, which in the state of Fig. 5 faces the valve base 24, the sealing ring 38 is arranged in the not yet compressed state. This can be seen from the fact that a cross-section of the sealing ring 38 is still circular. The sealing ring 38 is arranged in the groove 36 on the underside of the circumferential projection 34.

[0067] Fig. Figure 6 shows a sectional view of the valve base assembly 20 during a further intermediate step of the assembly, which is based on the Fig. 5 follows. The valve base 22 has now been pressed into the through-opening of the valve base 24 to such an extent that the circumferential projection 34 rests on an upper side of the dome-like attachment 28 and on an upper side of the reinforcing sleeve 32. In this state, the sealing ring 38 has already been compressed, which is indicated by the Fig. 6 oval cross-section of the sealing ring 38 can be seen.

[0068] To position the valve stem 22 in the Fig. 6 shown position, the Fig. 6 The second end of the valve stem 22, visible below, is conically widened and flanged outwards.

[0069] This is done by means of a mandrel 42, which is inserted into the second end of the valve stem 22. The mandrel 42 can rotate during insertion, but can also only be moved axially toward the valve stem 22.

[0070] The mandrel 42 has a generally conical outer surface 44, which is provided with two circumferential elevations. These two elevations are arranged on a frustoconical base body.

[0071] The mandrel 42 is now pressed into the second end of the valve stem 22, thereby causing the second end to be bead radially outward by 90°. The mandrel 42 is pressed into the second end of the valve stem 22 until a stop surface 46 surrounding the working surface 44 rests against the underside of the valve base 24.

[0072] This condition is shown in a sectional view in Fig. 7 shown.

[0073] It can be seen that further movement of the mandrel 42 into the second end of the valve stem 22 is now stopped by the contact surface 46 against a bottom side or a lower end of the outer part 26 and the reinforcement sleeve 32. The second end of the valve stem 22 was flanged outwards by 90° by the working surface 44 and has thereby penetrated into the material of the reinforcement sleeve 32. By flanging radially outwards by 90°, an undercut 48 has formed between the section 40 of the valve stem 22 and the reinforcement sleeve 32, which now prevents the valve stem 22 from Fig. 7 upwards, can be pulled out of the reinforcement sleeve 32. A movement of the valve stem 22 in Fig. 7 downwards, i.e. further into the reinforcement sleeve 32, is prevented by the circumferential projection 34. In other words, the valve stem 22 is in the state of Fig. 7 is secured against downward and upward movement on the valve base 24. A rotation of the valve stem 22, i.e. about a rotation axis running in the through-opening of the valve stem 22, is prevented by the circumference of the section 40 of the valve stem 22 deviating from a circular shape, as already shown in the Fig. 2 and Fig. 3 was explained.

[0074] The valve stem 22 is thus connected to the valve base 24 in a manner capable of withstanding high mechanical loads. Furthermore, the connection between the valve stem 22 and the valve base 24 is airtight or gas-tight, since, firstly, the section 40 of the valve stem 22 is pressed into the reinforcing sleeve 32 and, secondly, the flanging presses the second end of the valve stem 22 radially outward against the reinforcing sleeve 32 and penetrates a certain distance into the material of the reinforcing sleeve 32. Furthermore, the sealing ring 38, which is compressed in the assembled state of the valve base assembly 20, ensures an airtight seal of the connection between the valve stem 22 and the valve base 24.

[0075] Based on the state of the Fig. 7, the mandrel 42 is withdrawn from the through-hole of the valve stem 22 and the valve base assembly 20 is then completed. The valve base is then welded to the outside of the hose element 12 to form the Fig. 1 to achieve the finished state of the hose 10. The connection of the valve base assembly 20 to the hose element 12 is carried out by welding with laser light. For this purpose, see Fig. 8, the valve base assembly 20 in a suitable holder which is in Fig. 8 is not shown, and the hose element 12 is thus against the Fig. 8 bottom of the valve base 24 is pressed so that the outside of the Fig. 8 upper material layer rests flat against the underside of the plate-like fastening part 30 of the valve base 24. The hose element 12 can be pressed against the underside of the valve base 24 by means of a pressing element 50, which consists of material transparent to the laser light used to weld the valve base 24 to the hose element 12, or which has at least one window made of material transparent to the laser light. However, the pressing plate 50 can also have through-openings, for example, so that welding can be performed only within the through-openings if necessary.

[0076] The valve base assembly 20 is in the state of Fig. 8 is exposed to laser light 52. The arrows 52 symbolize only the laser light. For example, only a single laser beam is used, which is then moved over the surface of the plate-like fastening part 30 until an airtight weld is formed between the outside of the Fig. 8 upper material layer of the hose element 12 and the underside of the plate-like fastening part 30 of the valve foot 24.

[0077] In order to prevent the two material layers of the hose element 12 from being welded together by the laser light 52, the hose element 12 is made of a thermoplastic polymer that is largely transparent to the laser light 52 used. The plate-like fastening part, on the other hand, is made of a thermoplastic polymer that absorbs the laser light 52 used. When irradiated with laser light 52, this mainly heats the underside of the plate-like fastening part 30. In addition, a focus of a laser beam from the laser light 52 is focused such that the highest energy density is present precisely at the interface between the plate-like fastening part 30 and the hose element 12. In the region of this interface, the material of the plate-like fastening part 30 and the material of the hose element 12 are then strongly heated and firmly bonded to one another by welding.

[0078] The invention makes it possible to securely attach a valve base even to extremely lightweight, thin hoses made of thermoplastic material, so that the valve base and in particular the valve stem of the valve base are mechanically highly resilient and are connected airtight to the valve base or the hose. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2018 202 798 B4 [0002, 0048]

Claims

[1] Valve base arrangement (20) for a tube of a tire, in particular for a tube for a bicycle tire, with a valve base (24) which can be connected to a tube (12), a tubular valve stem (22) which is connected to the valve base (24), wherein the valve stem is inserted into a through-opening of the valve base (24), wherein the valve stem (22) is formed from metal, characterized by that the valve foot (24) has an outer part (26) with a dome-like attachment (28) and a plate-like fastening part (30) for fastening to the hose (12), and that a reinforcing sleeve (32) is arranged in the dome-like attachment (28), which defines the through-opening of the valve foot (24) for inserting the valve stem (22). [2] Valve base arrangement according to claim 1, characterized by that the valve base (24) is formed at least in sections from thermoplastic polymer (TPU) and the valve stem (22) from metal. [3] Valve base arrangement according to claim 2, characterized by that the valve stem (22) is formed from a light metal, in particular aluminum. [4] Valve base arrangement according to claim 2 or 3, characterized by that the outer part (26) is made of thermoplastic polymer (TPU) and the reinforcing sleeve (32) is made of fiber-reinforced plastic, in particular fiber-reinforced thermoplastic polymer. [5] Valve base arrangement according to one of the preceding claims, characterized by that the valve stem (22) has a circumferential projection (34) which rests on an upper side of the dome-like attachment (28). [6] Valve base arrangement according to claim 5, characterized by that a sealing ring (38) is arranged between an underside of the circumferential projection (34) and the upper side of the dome-like attachment (28). [7] Valve base arrangement according to claim 6, characterized bythat the circumferential projection (34) has, at its end facing the valve base (24), a circumferential recess (36) for partially receiving the sealing ring (38). [8] Valve base arrangement according to one of the preceding claims, characterized by that the dome-like attachment (28) tapers towards the first end of the valve stem (22). [9] Valve base arrangement according to one of the preceding claims, characterized by that the valve stem (22) has a first end for installing a valve and a second end which is inserted into the through opening in the valve base (24), wherein the valve stem (22) is flanged radially outwards at the second end. [10] Valve base arrangement according to at least one of the preceding claims, characterized bythat the valve stem (22) in the region (40) which is inserted into the reinforcing sleeve (32) has a circumference which deviates from a circular shape, in particular polygonal, hexagonal, octagonal or polylobular. [11] Valve base arrangement according to one of the preceding claims, characterized by that the reinforcing sleeve (32) has an inner circumference deviating from a circular shape, in particular polygonal, hexagonal, octagonal or polylobular. [12] Valve base arrangement according to at least one of the preceding claims, characterized by that the valve stem (22) is held in the reinforcing sleeve (32) by means of a press fit in the region in which it is inserted into the reinforcing sleeve (32). [13] Valve base arrangement according to one of the preceding claims, characterized bythat the reinforcing sleeve has an internal thread and / or the valve stem has an external thread in the area which is inserted into the reinforcing sleeve. [14] Valve base arrangement according to claim 13, characterized by that the valve stem is conically tapered towards the second end in the area where it is inserted into the reinforcing sleeve. [15] Method for producing a valve base arrangement according to at least one of the preceding claims, characterized by Inserting a second end of a valve stem (22) into a through opening in the valve base (24). [16] Method according to claim 15, characterized by Flanging the second end of the valve stem (22). [17] Method according to claim 16, characterized by Flanging the second end of the valve stem (22) radially outwards by 90 degrees. [18] Method according to claim 16 or 17, characterized byWidening the end region of the valve stem (22) adjoining the second end in a radial outward direction. [19] Method according to claim 18, characterized by conical widening of the end region of the valve stem (22) which adjoins the second end. [20] Method according to one of claims 18 to 19, characterized by simultaneous flanging and expanding. [21] Method according to one of claims 18 to 20, characterized by Flanging and expanding by inserting a mandrel (42) into the second end of the valve stem (22). [22] Hose (10) for a tire, in particular a hose for a bicycle tire, wherein the hose consists of thermoplastic polymer and a valve foot arrangement (20) according to at least one of the preceding claims 1 to 14 is connected to the hose, wherein the valve foot (24) of the valve foot arrangement (20) is welded to an outer side of the hose (12). [23] Tube for a tire according to claim 22, characterized by in that the tube (12) and the valve base (24) are welded by means of a laser, wherein the tube (12) is formed from a thermoplastic polymer which is transparent to the laser light used, and wherein at least the outer part (28) of the valve base (24) is formed from a thermoplastic polymer which absorbs the laser light used. [24] A method for producing a hose according to any one of claims 22 to 23, characterized by Welding a valve base (24) to an outer wall of the hose (12) by means of laser light. [25] Method according to claim 24, characterized by Placing the hose (12) on an underside of the valve base (24) facing away from the first end of the valve stem (22) so that two material layers of the hose material lie against one another and applying laser light to the underside of the valve base (24) through the two material layers. [26] Method according to claim 25, characterized by Focus the laser light on the underside of the valve base (24).

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