COMPONENT WITH MOLDED-IN WIRE THREAD INSERT

Description

1. Field of the invention

[0001] The present invention relates to a component made of a thermoplastic material with a wire thread insert molded therein and to a corresponding manufacturing process for this. 2. Background of the invention

[0002] When joining two components with a screw, great importance is placed on both securing the screw against self-loosening and ensuring a reliable connection between the component and the screw, resulting in high pull-out strength. Therefore, it is known to equip a component, particularly one made of plastic, with a wire thread insert. Typically, the wire thread insert is inserted into a component opening with an internal thread after the component has been manufactured, for example, using a special assembly tool. Examples of this procedure can be found in US 4,563,119, US 4,645,398, US 4,553,303, US 2,152,681, US 2,363,663, DE102009048160A1, and EP 1,897,659.

[0003] A particularly challenging application area, characterized by high dynamic loads, especially vibrations, compared to other sectors, is the aerospace industry. Here, in addition to the requirements for the connection itself, the dynamic loads also place special demands on the component material. Currently, such aerospace-grade screw clamps are achieved using overmolded metal inserts with thread reinforcement or pitch distortion. Alternatively, highly complex components are overmolded, which also incorporate a wire thread insert. Only these designs currently meet the requirements of the aerospace industry.

[0004] An example of a component with an integrated wire thread insert can be found in US Patent 3,945,070. In this case, a wire thread insert is provided with a thread pitch that is higher than the desired thread pitch of the wire thread insert in the component. For screw retention, the wire thread insert may have a second section with a different thread pitch, resulting in a pitch distortion. During the molding process, the wire thread insert is axially compressed due to material shrinkage as the material cools, resulting in the desired thread pitch. The component material is generally plastic or metal, and neither a specific application nor the associated technical requirements are discussed or considered.

[0005] The object of the present invention is therefore to provide a component with a wire thread insert molded into it, which is particularly suitable for applications in the aerospace industry and provides a reliable screw locking mechanism, especially with high repeatability. 3. Summary of the invention

[0006] The above problem is solved by a component made of a thermoplastic material with a wire thread insert molded therein according to independent claim 1 and a manufacturing method for a corresponding component according to independent claim 8. Advantageous embodiments and further developments will become apparent from the following description, the drawings and the pending claims.

[0007] A component according to the invention consists of a thermoplastic material with a continuous operating temperature of at least 130 °C and has a wire thread insert molded into it, wherein the wire thread insert comprises a first axial end with a first inner diameter and a second axial end with a second inner diameter, is completely molded into the component in the axial direction and comprises at least one narrowed turn between the first and the second axial end with a third inner diameter that is reduced compared to the first and second inner diameters and is movable radially outwards to an inner wall of the component.

[0008] Particularly in the aerospace industry, thermoplastic materials from the high-performance plastics sector are increasingly being used for technological and cost reasons. The term high-performance plastic or high-performance thermoplastic is based on an application-oriented, engineering-based classification of thermoplastic materials. This classification generally distinguishes between three categories: standard plastics, engineering plastics, and high-performance plastics.

[0009] High-performance plastics meet higher demands than standard and engineering plastics. In particular, they exhibit better mechanical properties, higher chemical resistance, and / or higher heat resistance. However, their higher heat resistance often makes processing more difficult, frequently requiring specialized machinery. Furthermore, high-performance plastics are often specialized for a particular property, such as heat resistance. This contrasts with engineering plastics, which cover a broad range of functional applications.

[0010] All high-performance plastics contain aromatic structures. Aromatic structures combine the two most important characteristics for resistance to high temperatures. On the one hand, they are oxidation-resistant because the aromatic carbon-hydrogen bond is significantly more stable than the aliphatic carbon-hydrogen bond, thus hindering the formation of radicals that occur during thermal decomposition or fire. On the other hand, the chain stiffness of aromatic polymers is greater than that of aliphatic polymers, which increases the glass transition temperature (or, in the case of crystalline polymers, the crystallite melting point) and reduces solubility.

[0011] As mentioned above, thermal stability is a key property of high-performance plastics. Starting with the properties of standard plastics, mechanical and thermal improvements can be achieved simply by adding reinforcing materials such as glass and carbon fibers, stabilizing agents, and increasing the degree of polymerization. The continuous service temperature of at least 130 °C found in high-performance plastics is achieved by replacing aliphatic units with aromatic ones. The term "continuous service temperature" refers to the maximum temperature at which the respective plastic, after 20,000 hours of storage in hot air, has lost no more than 50% of its original properties. For further information, please refer to DIN IEC 216 and DIN EN 60216.

[0012] A higher continuous operating temperature can be achieved by completely eliminating aliphatic elements and closely linking aromatics through functional groups such as ether, sulfone, or imide groups, thus enabling continuous operating temperatures of at least 200 °C to at least 260 °C. Therefore, in a preferred embodiment, the thermoplastic polymer has a continuous operating temperature of at least 150 °C, preferably at least 170 °C, and particularly preferably at least 190 °C.

[0013] The wire thread insert is completely integrated within the component according to the invention. This means that the wire thread insert is surrounded by the component material on its radial outer surface. Only in the area of ​​the at least one tapered thread is there a gap between the radial outer surface of the wire thread insert and the inner wall of the component. This allows the at least one tapered thread to spring elastically when a screw is inserted, i.e., to move radially outwards. In a preferred embodiment, at least one of the axial ends is arranged axially spaced from the component surface. In an alternative embodiment, at least one of the axial ends is arranged flush with a component surface. In this way, the wire thread insert provides a point of engagement for the screw directly at the component surface.Furthermore, the first inner diameter at the first axial end and the second inner diameter at the second axial end are preferably the same, and particularly preferably the first and second inner diameters are constant for the entire wire thread insert. In this way, the wire thread insert has the following regions in the screw-in direction of a screw or an externally threaded element: adjacent to the first axial end, a first region with the preferably constant first inner diameter; followed by the region with the at least one narrowed turn with a reduced third inner diameter; and then a second region adjacent to the second axial end with the preferably constant second inner diameter.

[0014] The area with at least one narrowed turn and a reduced third inner diameter provides a screw locking function and is defined, for example, by a polygon extending over at least 360° of the thread path. Within this area, the screw cannot be freely screwed in; instead, it must be tightened with increased torque. During this process, the area with the at least one narrowed turn springs back and exerts a corresponding clamping force on the screw through the elastic restoring force of the polygon.

[0015] One advantage of the component according to the invention is that it is particularly well-suited to the requirements of a specific application area, namely the aerospace industry. A further advantage is that the component is supplied directly with the desired wire thread insert with screw-locking function, eliminating the need for separate insertion of the wire thread insert by a worker. Accordingly, the component does not first need to be provided with an internal thread into which the wire thread insert is inserted, which significantly simplifies manufacturing. Therefore, it is no longer necessary to screw a wire thread insert into an internal thread. In addition, the molded-in wire thread insert exhibits a higher pull-out strength compared to a subsequently inserted wire thread insert according to the prior art.

[0016] In the aerospace industry, a thread pitch reduction is typically used as a locking mechanism for screws, as described above. A further advantage of the present invention, and in particular the section with the at least one narrowed thread with a reduced third inner diameter in the wire thread insert, compared to the known method in aerospace applications, is that it provides an alternative embodiment of a screw locking function in this field of application, which also offers improved retightening capability. This is based in particular on the resulting elastic action of the screw locking mechanism, which ensures consistent thread clamping quality over a large number of tightening operations.

[0017] To date, the use of wire thread inserts with a reduced inner diameter for screw locking in the aerospace industry is only permitted in metal components with bores. Plastic applications in aerospace do not employ such solutions. According to current technology, these wire thread inserts must always be separately inserted into a threaded bore using an assembly tool. This is necessary, among other reasons, because these types of wire thread inserts, due to their oversized manufacturing in both radial and axial directions, only acquire the correct form of the standard thread during installation in a corresponding receiving thread.

[0018] Molding such a wire thread insert without special technical measures, as those resulting from the manufacturing process according to the invention described later, is also not possible. This would, among other things, lead to the area with the screw-locking function being surrounded by plastic material. Therefore, the screw-locking function would be lost, the springback of the corresponding area would be blocked after the component was manufactured, and a screw could no longer be screwed into the component, or only with enormous tightening torques.

[0019] A further advantage of the present invention is therefore that it provides a component with a wire thread insert offering an alternative screw locking function. Moreover, with regard to wire thread inserts featuring this type of screw locking function, the need for subsequent installation of the wire thread insert into the component is eliminated, which simplifies the manufacturing process and thus reduces costs. In this context, reference is also made to the manufacturing method according to the invention, which will be discussed later.

[0020] According to the invention, at least some thermoplastic material is present between the turns of the wire thread insert, between the first and second axial ends. Because of this feature, the wire thread insert used is not a metallic bushing, nor does it need to be a special block-wound wire thread insert in which no plastic or component material can penetrate between the turns. Rather, with the present wire thread insert, it is desirable that component material can flow between the individual turns during the manufacturing process. However, no plastic is present inside the wire thread insert itself, as will be explained later in the context of the manufacturing process. The plastic present axially between the turns, at most, additionally defines the internal thread generally provided by the wire thread insert.

[0021] In a preferred embodiment of the component, the at least one turn has at least one turn segment with at least one secant that narrows the constricted turn radially inwards. Alternatively or additionally, it is also preferred that the at least one constricted turn covers a 360° section of the thread. Furthermore, it is preferred that the component has at least two constricted turns, each covering a 360° section of the thread. Preferably, the two constricted turns are adjacent to each other. Alternatively, it is preferred that the two constricted turns are spaced apart, for example, by a turn with a larger inner diameter. With each of these configurations, the screw locking function can be specifically adjusted and adapted to the respective desired application.

[0022] In another advantageous embodiment of the component, the thermoplastic material is an amorphous polymer. Amorphous, in this context, generally refers to the state of a solid in which the building blocks—atoms, ions, or molecules—do not exhibit a periodic arrangement over a larger area, the so-called long-range order. Amorphous thermoplastics are transparent in their initial form. Additionally, a component made of amorphous thermoplastic is harder compared to semi-crystalline high-performance thermoplastics. However, a disadvantage compared to semi-crystalline plastics is its lower chemical resistance.

[0023] In a preferred embodiment of the component, the wire thread insert has the nominal dimension of a thread standard, in particular a metric ISO thread or an inch thread. In this way, the wire thread insert, and thus also the component, is adapted to the external thread of a screw to be mounted therein.

[0024] A wire thread insert, particularly for use in a component according to the invention, comprises: a first axial end with a first inner diameter and a second axial end with a second inner diameter; between the first and the second axial end, at least one tapered turn with a third inner diameter that is smaller than the first and second inner diameters and is radially movable outwards; and the wire thread insert is wound radially to a desired nominal dimension, with the exception of the at least one tapered turn, and has an interference in the axial direction compared to the desired nominal dimension, so that the wire thread insert is not wound tightly and a clearance exists in the axial direction between turns of the wire thread insert. With regard to the wire thread insert according to the invention, reference is made to the corresponding descriptions of the component according to the invention.In this context, it should be emphasized that the wire thread insert according to the invention only already has the desired nominal dimension in the radial direction. In the axial direction, there are gaps between the individual turns of the wire thread insert. In other words, this means that the wire thread insert is not wound tightly.

[0025] A manufacturing method according to the invention for a component according to the invention comprises the steps of: providing a wire thread insert having a first axial end with a first inner diameter and a second axial end with a second inner diameter, and at least one narrowed turn between the first and second axial ends with a third inner diameter that is smaller than the first and second inner diameters; screwing an element provided with an external thread into the wire thread insert so that the wire thread insert is completely arranged on the element provided with the external thread, thereby widening the at least one narrowed turn of the wire thread insert; arranging the element provided with the external thread and the wire thread insert in a mold; and casting thermoplastic material with a continuous service temperature of at least 130 °C into the mold as the component material.wherein the wire thread insert is completely surrounded by the component material in the axial direction, and demolding of the component from the mold and unscrewing of the element provided with the external thread, whereby the at least one constricted turn returns to its original shape and a wire thread insert with at least one constricted turn is present in the component, which is movable radially outwards to an inner wall of the component. The component according to the invention can be manufactured using the manufacturing process according to the invention. In advantageous embodiments of the manufacturing process, a thermoplastic material with a continuous operating temperature of at least 150 °C and / or an amorphous plastic is used for the component. With regard to the resulting advantages of the manufacturing process according to the invention, reference is made to the above descriptions of the component according to the invention.

[0026] To allow the area of ​​the wire thread insert with the at least one constricted turn to spring back, the externally threaded element, for example, a bolt or spindle core, is designed to expand the area with the at least one constricted turn before overmolding. This allows the plastic on the outside of the at least one constricted turn to cool in its expanded state. After the plastic has cooled and the externally threaded element has been unscrewed or turned out, the at least one constricted turn springs back. This creates a gap between the cooled plastic, which forms an inner wall of the component, and a radial outer surface of the at least one constricted turn. This gap can then be used by a worker for elastic springback during subsequent screw assembly.In this way, a particularly reliable screw locking function is provided by the component with molded-in wire thread insert.

[0027] In a preferred embodiment, during the casting of thermoplastic material into the mold, the thermoplastic material flows at least partially between the threads of the wire thread insert between the first and second axial ends. This defines that the wire thread insert used is neither a solid bushing nor wound on a block. Wound on a block in this context means that there is no axial clearance between the thread turns. However, precisely these axial clearances are present in the wire thread insert used here. Therefore, in its original behavior, the wire thread insert used is more akin to a compression or tension spring that already exhibits the desired radial dimension after its manufacture.The desired thread pitch, which is preferably smaller than the thread pitch present after the wire thread insert has been manufactured, is determined by the externally threaded element, such as the bolt or spindle core. Accordingly, the wire thread insert is held in the mold by a bolt or spindle core with a matching thread size. Besides ensuring the dimensional accuracy of the resulting thread, screwing or spindle mounting also guarantees that the plastic in the axial space between the threads of the wire thread insert cools in a manner adapted to the shape of the threaded spindle or the external thread of the bolt. The resulting thread is therefore always appropriately adapted to the spindle core or bolt, even if plastic is present on the thread flanks of the wire thread insert.

[0028] In an advantageous embodiment of the manufacturing process, the at least one turn has at least one turn segment with at least one secant that narrows the constricted turn radially inwards. Additionally or alternatively, it is preferred that the at least one constricted turn covers a 360° section of the thread path. Furthermore, it is advantageous if at least two constricted turns are provided, each covering a 360° section of the thread path. As explained above, with each of these embodiments, the screw locking function can be specifically adjusted and adapted to the respective desired application.

[0029] According to the invention, the wire thread insert, before being mounted on the bolt, has a pitch that is greater than the pitch of an external thread of the bolt, so that the wire thread insert is axially compressed on the bolt and radially expanded in the area of ​​the at least one narrowed turn. This further emphasizes the original design of the wire thread insert as a compression spring. In particular, after its manufacture and before assembly on the bolt, the wire thread insert has the required dimensional accuracy in the radial direction, with the exception of the at least one narrowed turn. In the axial direction, however, it has an interference fit.

[0030] In a further advantageous embodiment of the manufacturing process, the wire thread insert, by being positioned on the bolt, has a nominal dimension corresponding to a thread standard, in particular a metric ISO thread or an inch thread. As explained above for the component according to the invention, the wire thread insert, and therefore also the component, is thus adapted to the external thread of a screw to be mounted therein. 4. Brief summary of the drawings

[0031] The present invention is described in detail below with reference to the drawings. Identical reference numerals in the drawings denote identical components and / or elements. The drawings show: Figure 1 shows a sectional view of a component with a wire thread insert and an initially screwed-in screw, Figure 2 shows a sectional view of a component with a wire thread insert and a screwed-in screw, and Figure 3 shows a schematic process flow of an embodiment of a manufacturing process according to the invention. 5. Detailed description of preferred embodiments

[0032] An embodiment of a component 1 according to the invention is described below based on the Figures 1 and 2 described. Component 1 is a component 1 made of a thermoplastic material, in particular a high-performance plastic, which is preferably intended for use in the aerospace industry.

[0033] The term high-performance plastic or high-performance thermoplastic is based on an application-oriented, engineering-based classification of thermoplastic materials, which distinguishes between standard plastics, engineering plastics, and high-performance plastics. As the name suggests, high-performance plastics meet higher demands than standard and engineering plastics. In particular, they exhibit better mechanical properties, higher chemical resistance, and / or higher heat resistance. This contrasts sharply with engineering plastics, which cover a broad range of functional applications.

[0034] All high-performance plastics contain aromatic structures. Since the aromatic carbon-hydrogen bond is significantly more stable than the aliphatic carbon-hydrogen bond, its oxidation resistance makes radical formation, which occurs during thermal decomposition or fire, more difficult. Furthermore, the chain stiffness of aromatic polymers is greater than that of aliphatic polymers, which increases the glass transition temperature (or, in the case of crystalline polymers, the crystallite melting point) and reduces solubility. Aromatic structures therefore combine the two most important characteristics for high-temperature resistance. Thermal stability is thus a key property of high-performance plastics.

[0035] Starting with the properties of standard plastics, mechanical and thermal improvements can already be achieved by adding reinforcing materials such as glass and carbon fibers, stabilizing agents, and increasing the degree of polymerization. However, the continuous service temperature of at least 130 °C found in high-performance plastics is only achieved by replacing aliphatic units with aromatic ones. The term continuous service temperature refers to the maximum temperature at which the respective plastic, after 20,000 hours of storage in hot air, has lost no more than 50% of its original properties. In this regard, reference is made to DIN IEC 216 and DIN EN 60216.

[0036] A higher continuous operating temperature can be achieved by completely eliminating aliphatic elements and tightly linking aromatics through functional groups such as ether, sulfone, or imide groups, thus enabling continuous operating temperatures of at least 200 °C to at least 260 °C. Therefore, in a preferred embodiment, the thermoplastic polymer has a continuous operating temperature of at least 150 °C, preferably at least 170 °C, and particularly preferably at least 190 °C. Additionally or alternatively, the thermoplastic polymer is preferably selected from the group of amorphous polymers. Amorphous here generally refers to the state of a solid in which the building blocks, i.e., atoms, ions, or molecules, do not exhibit a periodic arrangement over a larger area, the so-called long-range order. Amorphous thermoplastic polymers are transparent in their initial form.Additionally, a component made of amorphous thermoplastic is harder compared to semi-crystalline thermoplastic high-performance plastics. However, a disadvantage compared to semi-crystalline plastics is its lower chemical resistance.

[0037] In component 1, a wire thread insert 10 with a first axial end 12 and a second axial end 14 is fully formed. The wire thread insert has a first inner diameter adjacent to the first axial end 12 and a second inner diameter adjacent to the second axial end 14. According to the illustrated embodiment, the first axial end 12 is arranged axially spaced from a component surface within component 1. In an alternative embodiment, the first axial end 12 can also be flush with the component surface. Furthermore, the wire thread insert 10 in component 1 has the nominal dimension of a thread standard, for example, a metric ISO thread or an inch thread.

[0038] Adjacent to the first 12 and the second axial end 14, in the areas with the first and second inner diameters, at least partially thermoplastic material is present between the turns of the wire thread insert 10. This results from the manufacturing process, which will be explained later with reference to Figure 3 This is explained. It becomes clear that with the wire thread insert 10 used, it is desirable that component material can flow between the individual threads during component manufacturing. However, no plastic is present inside the wire thread insert 10 itself, and the plastic present axially between the threads at most additionally defines the internal thread generally provided by the wire thread insert 10.

[0039] The wire thread insert further comprises a region 16 with at least one narrowed turn between the first 12 and the second axial end 14. The region 16 with the at least one narrowed turn defines a third inner diameter, which is smaller than the first and second inner diameters. In the illustrated embodiment, the region 16 with the third inner diameter is defined by the fact that the at least one narrowed turn encompasses a 360° portion of the thread path. The at least one narrowed turn has at least one thread segment with at least one secant that narrows the narrowed turn radially inward. It is also preferred that the component has at least two narrowed turns, each encompassing a 360° portion of the thread path. In the region 16 thus configured, a screw 30 cannot be screwed in freely, but must be tightened with increased torque.

[0040] Due to the specific manufacturing process of component 1, a gap exists between the radial outer surface of area 16 and the inner wall of the component. This gap enables the locking mechanism of the wire thread insert 10. During the tightening of the screw 30, area 16 can move radially outwards due to this gap and exert a corresponding clamping force on the screw 30 through the elastic restoring force of the at least one constricted thread. Figure 2 The screw 30, which is screwed into area 16, is shown.

[0041] During the insertion of screw 30 into component 1, the screw passes through the following areas of the wire thread insert 10. Adjacent to the first axial end 12, it is screwed into a first area with a constant first inner diameter. This is followed by area 16 with a reduced third inner diameter. A second area then follows, extending to the second axial end 14 and having a constant second inner diameter.

[0042] One advantage of component 1 is that it is specifically adapted to the requirements of a particular application area, namely the aerospace industry. Another advantage of component 1 is that it is supplied directly with the desired wire thread insert 10 with screw-locking function, eliminating the need for separate insertion of the wire thread insert 10 by a worker, as explained below with reference to Figure 3will be explained.

[0043] Figure 3Figure 1 shows a schematic process flow of an embodiment of a manufacturing process according to the invention. In step A, a wire thread insert is provided, which has a first axial end with a first inner diameter and a second axial end with a second inner diameter, as well as at least one tapered turn between the first and second axial ends with a third inner diameter that is smaller than the first and second inner diameters. The wire thread insert has a pitch that is larger than a subsequently desired thread pitch of a thread standard to be met, such as a metric ISO thread or an inch thread. In particular, after its manufacture and in its provided state, the wire thread insert has the required dimensional accuracy in the radial direction, with the exception of the at least one tapered turn.However, it has an interference in the axial direction. Accordingly, the wire thread insert is not wound tightly, and there is a gap between the turns of the wire thread insert in the axial direction. The at least one narrowed turn, for example, covers a 360° section of the thread. Likewise, the at least one narrowed turn, by way of example, has at least one turn segment with at least one secant that narrows the turn radially inward. It is further preferred that the component has at least two narrowed turns, each covering a 360° section of the thread.

[0044] In step B, an externally threaded element, such as a bolt or spindle core, is screwed into the wire thread insert so that the insert is fully seated on the bolt. This widens the at least one constricted turn of the wire thread insert. Additionally, this screwing action axially compresses the wire thread insert due to the reduced thread pitch of the bolt's external thread compared to the thread pitch of the wire thread insert. The wire thread insert thus resembles a compression spring. Alternatively, the wire thread insert can also resemble a tension spring, in which case the thread pitch of the bolt's external thread preferably causes axial elongation rather than compression.

[0045] In the subsequent step C, the bolt with the wire thread insert is placed in a mold. Then, in step D, thermoplastic material with a continuous operating temperature of at least 130 °C is poured into the mold, ensuring that the wire thread insert is completely surrounded by the material in the axial direction. For information regarding the material properties of the component, please refer to the above descriptions to avoid unnecessary repetition.

[0046] During the casting of the thermoplastic material into the mold, at least some of it flows between the threads of the wire thread insert between the first and second axial ends. As explained above, the wire thread insert therefore has axial gaps between the threads, even after the bolt is screwed in. Besides ensuring the dimensional accuracy of the resulting thread, screwing or threading it onto the bolt or threaded spindle also ensures that the plastic in the axial space between the threads of the wire thread insert cools in a manner adapted to the shape of the threaded spindle or the external thread of the bolt. The resulting thread is therefore always appropriately adapted to the spindle core or bolt, even if plastic is present on the thread flanks of the wire thread insert.

[0047] After casting, the plastic on the outside of the area with the narrowed thread cools in its expanded state. After the plastic has cooled and the bolt has been unscrewed or turned out, the area springs back, allowing this section of the wire thread insert to spring back later. This creates a gap between the cooled plastic, which forms the inner wall of the component, and the radial outer surface of the at least one narrowed thread, which can later be used for elastic springback.

[0048] Finally, in step E, the component is demolded from the mold and the bolt is unscrewed, causing the area to return to its original shape and providing a wire thread insert with at least one narrowed turn in the component, which can be moved radially outwards to an inner wall of the component when a screw is screwed in, thus providing a screw locking function.

[0049] This manufacturing process eliminates the need to first provide the component with an internal thread into which the wire thread insert is placed. Furthermore, the molded-in wire thread insert exhibits a higher pull-out strength compared to a subsequently inserted wire thread insert according to the prior art, which is particularly desirable in the aerospace industry. 6. List of reference symbols

[0050] 1 Component 10 Wire thread insert 12 First axial end 14 Second axial end 16 Area having at least one narrowed turn 30 Screw

Claims

1. Component (1) with a wire thread insert (10) molded therein, wherein the wire thread insert (10) a. comprises a first axial end (12) with a first inner diameter and a second axial end (14) with a second inner diameter, b. is completely molded into the component (1) in the axial direction and c. comprises between the first (12) and the second axial end (14) at least one narrowed turn with a third inner diameter which is reduced in comparison to the first and the second inner diameter, wherein the at least one narrowed turn is movable radially outwards up to an inner wall of the component, characterized in that d. the component (1) is made of a thermoplastic material having a temperature of continued use of at least 130 °C and e. the wire thread insert (10) comprises axial lee ways between the turns so that thermoplastic material is present at least partially between the turns of the wire thread insert (10) between the first (12) and the second axial end (14).

2. Component (1) according to one of the preceding claims, in which the at least one turn comprises at least one turn section with at least one secant which narrows the narrowed turn radially inwards.

3. Component (1) according to one of the preceding claims, in which the at least one narrowed turn (16) covers an area (16) of 360° of the thread course.

4. Component (1) according to one of the preceding claims, in which at least two narrowed turns are provided, each of which covers an area (16) of 360° of the thread course.

5. Component (1) according to one of the preceding claims, in which the thermoplastic material has a temperature of continued use of at least 150 °C.

6. Component (1) according to one of the preceding claims, in which the thermoplastic material is an amorphous plastic.

7. Component (1) according to one of the preceding claims, in which the wire thread insert (10) has the nominal dimension of a thread standard, in particular a metric ISO thread or an inch thread.

8. Manufacturing method for a component (1) according to one of the claims 1 to 7, which comprises the following steps: a. providing a wire thread insert (10) having a first axial end (12) with a first inner diameter and a second axial end (14) with a second inner diameter as well as between the first (12) and second axial end (14) at least one narrowed turn with a third inner diameter which is reduced compared to the first and the second inner diameter, b. screwing an element having an outer thread into the wire thread insert (10) so that the wire thread insert (10) is arranged completely on the element having the outer thread, so that the at least one narrowed turn of the wire thread insert (10) is expanded, as well as c. arranging the element having the outer thread with wire thread insert (10) in a casting mold and the method is characterized by the further steps: d. casting thermoplastic material with a temperature of continued use of at least 130 °C as component material into the casting mold, wherein the wire thread insert (10) is completely surrounded by the component material in axial direction, and e. demolding the component (1) from the casting mold and unscrewing the element having the outer thread, so that the at least one narrowed turn returns to its original shape and a wire thread insert (10) with at least one narrowed turn is present in the component (1), wherein the narrowed turn is movable radially outwards up to an inner wall of the component, wherein f. prior to being arranged on the element comprising the outer thread, the wire thread insert (10) has a pitch which is greater than the pitch of the outer thread of the element that is provided with the outer thread, so that the wire thread insert (10) on the element that is provided with the outer thread is axially compressed and the at least one narrowed turn is radially expanded.

9. Manufacturing method according to claim 8, wherein during the casting of thermoplastic material into the casting mold, the thermoplastic material flows at least partially between the turns of the wire thread insert (10) between the first (12) and the second axial end (14).

10. Manufacturing method according to one of the claims 8 or 9, in which the at least one turn comprises at least one turn section having at least one secant which narrows the narrowed turn radially inwards.

11. Manufacturing method according to one of the claims 8 to 10, in which the at least one narrowed turn (16) covers an area (16) of 360° of the thread course.

12. Manufacturing method according to one of the claims 8 to 11, in which at least two narrowed turns are provided, each of which covers an area (16) of 360° of the thread course.

13. Manufacturing method according to one of the claims 8 to 12, in which the thermoplastic material has a temperature of continued use of at least 150 °C and / or in which the thermoplastic material is an amorphous plastic.

14. Manufacturing method according to one of the claims 8 to 13, in which, due to the step of being arranged on the element that is provided with the outer thread, the wire thread insert (10) has a nominal dimension of a thread standard, in particular of a metric ISO thread or an inch thread.