Injection-molded hollow body, device for producing injection-molded hollow body, adjustable fluid dispenser having injection-molded hollow body, and vehicle

Abstract

The utility model provides an injection molding hollow body (1), in particular to a rotationally symmetrical injection molding hollow body, which comprises at least one peripheral wall (10), the peripheral wall is provided with an inner side (20), an outer side (15) and at least one through hole (11, 12, 13 and 14) penetrating through the peripheral wall (10), and the at least one peripheral wall (10) is provided with an inclined part of a demoulding angle (beta) relative to a vertical line (S) at least on the inner side (20) of the at least one peripheral wall (10). The at least one through-hole (11, 12, 13, 14) is surrounded by a release region (21) in which an angle of inclination (alpha) of the peripheral wall (10) differs from an angle of inclination outside the release region (21) in order to avoid the angle of inclination (alpha) of the at least one through-hole (11, 12, 13, 14) from the inside (20) of the peripheral wall (10) to the inside of the peripheral wall (10). 14) and / or avoiding damage to elements in contact with the inner side (20) of the peripheral wall (10) of the injection-molded hollow body (1) caused by the formation of burrs.

Description

Technical Field

[0001] The utility model relates to an injection-molded hollow body, in particular to a rotationally symmetrical injection-molded hollow body, comprising at least one peripheral wall, the peripheral wall having an inner side and an outer side, and having a through hole penetrating the at least one peripheral wall, the at least one peripheral wall having an inclined portion at least on its inner side at a demoulding angle relative to a vertical line, and relates to an adjustable fluid distributor, in particular to a rotary valve, comprising at least one shell and at least one valve body in the at least one shell, wherein the at least one valve body is rotatably and / or movably arranged in the shell, and wherein the at least one shell can be provided with or is provided with at least one connecting pipe sleeve on the outer side, and relates to a method for producing a fluid distributor. This device for injection molding hollow bodies, wherein the device includes at least one injection outer mold and at least one injection mold core, wherein the at least one injection mold core and the at least one injection outer mold form a cavity between them, and plastic material can flow or flow into the cavity to form an injection molded hollow body, wherein at least one injection mold core is formed conically and has an inclined portion corresponding to the demolding angle on its outer side to support the demolding of the injection molded hollow body, and relates to a vehicle, in particular a vehicle with an internal combustion engine, a fuel cell vehicle, a battery-driven vehicle, a plug-in hybrid vehicle, which includes at least one adjustable fluid distributor in the vehicle's thermal management system. Background Art

[0002] Injection-molded, in particular rotationally symmetrical, injection-molded hollow bodies are known in the prior art. These are used in particular as housings for adjustable fluid distributors, such as rotary valves, as are known, for example, from DE 10 2018 009 680 A1. The injection-molded hollow body has a peripheral wall with an inner side and an outer side and a connecting sleeve on the outer side and corresponding through-holes introduced in the peripheral wall, whereby a medium can flow from the interior of the injection-molded hollow body through the corresponding through-holes in the peripheral wall into the connecting sleeve and through the connecting sleeve into a medium line connected thereto. To produce such an injection-molded hollow body, a device can be used, which comprises an injection mold outer die and an injection mold core, which form a cavity between them, into which the plastic material can flow to form the injection-molded hollow body. In order to enable demoulding, it is also known to form an injection mold core conically, whose outer side has an inclination corresponding to the demoulding angle relative to the vertical, that is, relative to the vertical axis of the injection mold core or the injection mold outer mold and also the injection molded hollow body formed between them in the cavity. For this purpose, the peripheral wall of the injection molded hollow body is also formed conically, so that demoulding can be achieved in the direction of the larger opening width of the hollow body. Therefore, at least one peripheral wall of the injection molded hollow body has an inclination at a demoulding angle relative to the vertical at least on its inner side, so that the produced injection molded hollow body can be demoulded. This means that, at least on the inner side of the injection molded hollow body, its peripheral wall has an inclination angle relative to the vertical to form a demoulding slope and enable demoulding, so as to remove the injection mold core required to form the injection molded hollow body.

[0003] In particular, in the region of the through-holes formed in the peripheral wall of the injection-molded hollow body, which form a transition to the connecting sleeve connected there, separation burrs are generated by the inner core arranged there for forming the through-holes and the connecting sleeve. When the injection-molded hollow body is subsequently used as a housing for a rotary valve, as shown in DE 10 2018 009 680 A1, when the valve body arranged inside the injection-molded hollow body is moved, i.e. rotated and / or pushed relative to the housing, these separation burrs in the region of the through-holes can lead to damage to the connecting sleeve arranged on the outside of the hollow body, i.e. to the elements placed there, such as seals. Due to the scratching effect of the separation burrs on the seals, for example, their functional service life is shortened, so that leakage paths can occur in the rotary valve comprising such an injection-molded hollow body as a housing. In addition or alternatively, there is a further problem that when the valve body is moved in the injection-molded hollow body used as a housing for the rotary valve, the torque or force required to move the valve body is increased due to the separation burrs. The separation burr can protrude into the movement path of the valve body in the injection-molded hollow body, thus leading to a torque when the valve body is rotated in the injection-molded hollow body or an increase in force when the valve body is displaced relative to the injection-molded hollow body of the valve, which serves as a housing. On the other hand, separation burrs can also form in the circumferential direction, which, although they do not protrude into the movement path, can still damage the seal, because the seal is made of elastic material and therefore expands into the free space of the through-hole and can thus be damaged by the separation burr.

[0004] Burrs or separation burrs that remain in the circumferential wall of the injection-molded hollow body in the region of transitions or through-holes after injection molding can be particularly problematic if seals or other sensitive components come into contact with or move over the region of transitions or through-holes. In particular, in the case of plastic fillings, embedded fibers or glass fibers can have a particularly abrasive effect in the region of these burrs or separation burrs, thus causing damage to seals and the like. Utility Model Content

[0005] Therefore, the purpose of the present invention is to propose an injection molded hollow body, an adjustable fluid distributor, in particular a rotary valve having such an injection molded hollow body and a device for producing such an injection molded hollow body, as well as a vehicle having at least one adjustable fluid distributor, wherein the above-mentioned disadvantages no longer occur and damage to the seal and / or valve body of the fluid distributor due to burrs formed in the transition area around the through hole in the peripheral wall of the injection molded hollow body can also be effectively avoided, and the valve body is rotatably and / or slidably arranged inside the injection molded cavity.

[0006] This object is achieved by an injection molded hollow body, in particular a rotationally symmetrical injection molded hollow body, comprising at least one peripheral wall, the peripheral wall having an inner side and an outer side and having a through hole penetrating the at least one peripheral wall, wherein at least one peripheral wall has an inclination at least on its inner side at a draft angle β relative to a vertical line S, wherein the at least one through hole is surrounded by a relief area, wherein in the relief area the angle of inclination of the peripheral wall differs from the angle of inclination on the outer side of the relief area in order to avoid the formation of burrs in the transition area from the inner side of the peripheral wall to the at least one through hole and / or to avoid damage to components that come into contact with the inner side of the peripheral wall of the injection molded hollow body due to the formation of burrs. This object is achieved by an adjustable fluid distributor, in particular a rotary valve, having at least one housing and at least one valve body located in the at least one housing, wherein the at least one valve body is rotatably and / or displaceably arranged in the housing, and wherein the at least one housing can be provided with or is provided with at least one connecting pipe sleeve on the outer side, wherein the at least one housing is formed by such an injection molded hollow body. For the device for producing an injection-molded hollow body according to the utility model, the injection-molded hollow body has at least one peripheral wall and at least one through hole penetrating the peripheral wall, wherein the device comprises at least one injection outer mold and at least one injection mold core, wherein the at least one injection mold core and the at least one injection outer mold form a cavity between them, and plastic material can flow into the cavity to form the injection-molded hollow body, wherein the at least one injection mold core is formed conically and has an inclined portion corresponding to the demolding angle on its outer side to support the demolding of the injection-molded hollow body, the purpose is achieved by at least one injection mold core having at least one protruding area, which has an inclined angle different from the demolding angle to form a release area of ​​the injection-molded hollow body around the at least one through hole. For the vehicle according to the utility model, in particular a vehicle with an internal combustion engine, a fuel cell vehicle, a battery-driven vehicle, a plug-in hybrid vehicle, including at least one adjustable fluid distributor in the thermal management system of the vehicle, the purpose is achieved by at least one adjustable fluid distributor of the thermal management system including such an injection-molded hollow body. The further improved scheme of the utility model is defined in the embodiment.

[0007] Thus, an injection-molded hollow body is obtained, i.e. a hollow body produced by injection molding, which has a peripheral wall which has a demoulding chamfer at least on its inner side and therefore has an inclination at a demoulding angle relative to the vertical, i.e. relative to the vertical axis to the injection-molded hollow body. Therefore, the reference line for determining the inclination or demoulding angle of the peripheral wall in its interior is the vertical or an axis or line parallel to the vertical axis of the injection-molded hollow body. At least one relief area is provided around the through-hole of the peripheral wall. The relief area is understood to mean an area completely surrounding the through-hole, in which the inclination angle of the peripheral wall deviates from the inclination angle outside the relief area. As a result, when demoulding the injection-molded hollow body around the through-hole, i.e. in the transition area from the relief area to the surface surrounding the relief area on the inner side of the peripheral wall, the formation of burrs cannot be completely avoided. However, due to the release by providing at least one release area, the burr no longer contacts the elements in contact with the inner side of its peripheral wall in the injection molded hollow body, such as a valve body or a rotary valve, which is rotatably and / or displaceably arranged inside the injection molded hollow body forming a housing as an adjustable fluid distributor, in particular a rotary valve, and / or no longer contacts the seal for sealing the valve body relative to the injection molded hollow body, and therefore no longer produces the disadvantageous effects of the above-mentioned prior art. When the injection molded hollow body is demoulded, the formation of burrs around the through-hole cannot be completely avoided, but the problem is that soft elements that are in contact there or move on it, such as seals and / or valve bodies, are damaged by protruding burrs as occurs in the prior art. This is achieved by providing corresponding release areas around the through-hole in the peripheral wall of the injection molded hollow body.

[0008] The injection-molded hollow body is further formed slightly conically at least on its inner side, for example with a draft angle of 2° to 3° to the vertical, wherein a further inclination or draft angle is provided in the release area around the through-hole of the peripheral wall axis. By providing an inclination or draft angle in the release area that is different from the inclination or draft angle of the peripheral wall, i.e., the peripheral wall outside the respective release area is provided with a different inclination relative to the peripheral wall in the release area, a radial distance that decreases from a maximum value to a minimum value is provided between the release area and the area of ​​the peripheral wall surrounded by the release area. Thus, no forced demolding is provided, but rather the release area around the respective through-hole in the peripheral wall also has a draft angle, so that the injection-molded hollow body can also be demolded in this area. Forced demolding is understood to mean a depression in the wall of the injection-molded hollow body, from which the injection mold core is pulled out with force as the hollow body expands. If forced demoulding is provided in the present case, its adverse effect on the geometry of the inner surface of the injection-molded hollow body and the process-related disadvantages will prove to be very negative, because the injection-molded part is demoulded in the form of the injection-molded hollow body in a warm or hot state, which allows forced demoulding, i.e. in a semi-soft state. In this semi-soft state, when the injection-molded hollow body expands during forced demoulding, undesirable deformations and damage to the inner surface of the injection-molded hollow body may occur. This is avoided by the fact that the release area around the corresponding through-hole in the peripheral wall also has a demoulding angle.

[0009] The corresponding relief area is advantageously formed in the peripheral wall in the form of a depression, wherein the through hole surrounded by it is located within the relief area. Due to the different inclination angles of the peripheral wall in the relief area and the surface of the peripheral wall surrounded by the relief area, the depression does not have a uniform depth, but has an area with a maximum depth and an area with a minimum depth of zero. The relief area thus transitions from its first end with the maximum depth, in particular continuously, at the inclination angle of the surrounding peripheral wall to its opposite second end. Thus, at the first end, the depression of the relief area has its maximum depth and at the second end has its minimum depth, in particular zero at the point where it merges into the surface of the peripheral wall.

[0010] The relief area formed in the peripheral wall can, for example, have a depth of 0.05 mm to 0.5 mm, in particular a depth of 0.1 mm, advantageously a depth of 0.2 mm and more advantageously a depth of 0.3 mm in the deepest section of the peripheral wall, for example in the section with the greatest depth. The respective selection of the depth in the region of the section with the greatest depth at the first end of the relief area formed in the peripheral wall can depend in particular on the size of the relief area and therefore also on the size of the respective through-hole surrounded by it. Thus, the inclination angle of the peripheral wall also depends on the respective relief area.

[0011] Advantageously, the peripheral wall of the injection-molded hollow body has a smaller inclination in the release region than in the regions of the peripheral wall outside this region, the inclination being measured relative to the vertical, wherein the vertical, as described above, is understood to be the vertical axis of the injection-molded hollow body and axes parallel thereto. In particular, the peripheral wall of the injection-molded hollow body can have an inclination of 0° to 2.5° relative to the vertical in the release region, preferably an inclination of 1.5° to 2° relative to the vertical. Thus, the inclination of the peripheral wall of the injection-molded hollow body in the release region relative to the vertical can also be 0° in particular, so that it extends along the vertical, so that the peripheral wall is cylindrical in this release region, while outside this region it has a non-zero draft angle with the vertical. The release region of the peripheral wall of the injection-molded hollow body has a maximum depth in particular in this region, in which the conical shape of the peripheral wall, in relation to the region of the arrangement of the release region, has its smallest inner diameter or smallest clear width.

[0012] As already mentioned, the respective relief region surrounds the respective through-hole, similar to a channel. At its narrowest point, it can have a width of at least 0.5 mm, measured between the through-hole and the distal edge of the relief region adjacent thereto in the radial direction, in particular a width of 0.5 mm to 3 mm. The width of the relief region can therefore be very small, since the relief region serves only to provide a rounding of the circumferential wall surface surrounding the respective through-hole in the circumferential wall of the injection-molded hollow body, in order to avoid the formation of burrs in the transition region from the respective relief region to the inner side of the injection-molded hollow body surrounding it when the injection-molded hollow body is demoulded. Due to the relief or the respective relief region, the separation burrs remaining in the region of the respective through-hole in the circumferential wall of the injection-molded hollow body after the injection-molded hollow body has been removed from the injection-molding tool or the device for producing the injection-molded hollow body are harmless.

[0013] In particular, the release area has a curved and / or chamfered edge area and / or a tangentially continuous transition to the peripheral wall in the section formed at the deepest part of the peripheral wall. Therefore, the transition from the surface on the inner side of the peripheral wall to the surface of the release area is advantageously rounded and / or chamfered and / or tangentially continuous. Thus, burrs are reliably avoided in the transition area from the release area to the inner side of the peripheral wall of the injection-molded hollow surrounding it during demoulding in this area, and thus damage to the seal located in, for example, an adjustable fluid distributor is avoided. In principle, burrs will also be generated on the edge between the corresponding through hole and the corresponding release area, but due to the release area, the burrs no longer cause damage to the seal. Therefore, a curved or tangentially continuous transition is generated between the inner surface of the peripheral wall surrounding the release area and the corresponding release area. The radius of curvature can be, for example, at least R0.05, preferably R0.05 to R5.0. The width of the rounded and / or chamfered and / or tangentially continuous transition to the release region can depend on the dimensions of the injection-molded hollow body or on the dimensions of the corresponding through-hole in the circumferential wall of the injection-molded hollow body.

[0014] In plan view, the surface of the release area with the through hole surrounded by it can, for example, have the shape of a conical section and / or a trapezoid with rounded corners. In addition, the area can be at least partially in the shape of a parabola and / or a parabola, a hyperbola and / or a hyperboloid and / or a semicircle. In each case, the release area is provided with rounded corners or rounded edges so that during demoulding and in the subsequent use of the injection-molded hollow body in an adjustable fluid distributor, such as a rotary valve, the burrs formed are avoided as much as possible from damaging soft components located there or moving there, such as seals. Therefore, the release area can have a variety of shapes.

[0015] The injection molded hollow body can advantageously be an adjustable fluid connector, in particular the housing of a rotary valve or at least a part of the housing. In such an adjustable fluid distributor, in particular the housing of a rotary valve, at least one valve body can be arranged, which can be rotated and / or pushed in the housing. Therefore, the adjustable part of the fluid distributor in particular in the form of a rotary valve is at least one valve body. A connecting sleeve can be provided on the outer side of the housing or the injection molded hollow body, which is either directly molded or inserted into a through hole provided there and fastened. A medium pipeline can be connected to the connecting sleeve, through which the medium can be introduced and led out of the adjustable fluid distributor. The medium is distributed in the fluid distributor by the valve body, so that the medium flowing in through one or more connecting sleeves can flow out of the fluid distributor again through one or more connecting sleeves by appropriate positioning of the valve body or corresponding rotation and / or pushing. For example, this makes it possible to control the coolant flow in a thermal management system.

[0016] Such a valve body can be provided with one or more seals on the outside, which rest on the inner side of the peripheral wall of the injection-molded hollow body of the housing used for sealing purposes. Here, they advantageously surround the corresponding through-holes in the peripheral wall of the injection-molded hollow body or housing of the fluid distributor, in particular the rotary valve. Such seals can be arranged circumferentially around the valve body and in its longitudinal direction, and thus reliably avoid the undesired escape of the medium between the valve body and the housing of the adjustable fluid distributor and the undesired overflow of the medium between the through-holes. In particular, in the area where at least one seal is placed on the inside of the housing, it has proven to be advantageous to provide corresponding release areas around the corresponding through-holes or in the passage of the corresponding connecting sleeve, wherein the connecting sleeve protrudes outward from the outer side of the peripheral wall of the injection-molded hollow body or the housing. By surrounding the corresponding release areas of the corresponding through-holes in the peripheral wall of the injection-molded hollow body, damage to the corresponding seals of the valve body moving in the housing can be reliably avoided. Separation burrs during demoulding no longer occur in the transition region from the circumferential wall outside the respective release region to this region, but rather this transition region is rounded and / or chamfered so that no damage to the seal can occur here.

[0017] In order to produce the release area, the injection mold core provided for shaping the interior of the injection molded hollow body has at least one protruding area corresponding to the shape of the release area to be formed. In order to form the release area, the protruding area or a plurality of protruding areas that together form the release area can be provided on the injection mold core. The protruding area has at least one inclination angle or demoulding angle, which is different from the demoulding angle in the remaining outer surface of the injection mold core. In the at least one protruding area, a through hole is also formed in the peripheral wall, for example by a slide or by subsequent drilling. The through hole is located in the surface of the protruding area. Through the at least one protruding area, the release area is formed around the corresponding through hole in the peripheral wall of the injection molded hollow body. The transition area from the outer surface of the injection mold core surrounding the protruding area to the protruding area can be provided by providing corresponding fillets and / or chamfers in the transition area from the injection mold core to the protruding area. The fillets and / or chamfers form the desired curved and / or chamfered and / or tangent-continuous transition section on the injection molded hollow body. This makes it possible to avoid separation burrs remaining in these transition areas.

[0018] The utility model also provides a device for producing the injection-molded hollow body, wherein the injection-molded hollow body has at least one peripheral wall and at least one through hole penetrating the peripheral wall, wherein the device comprises at least one injection outer mold and at least one injection mold core, wherein the at least one injection mold core and the at least one injection outer mold form a cavity therebetween, and plastic material can flow into the cavity to form the injection-molded hollow body, wherein the at least one injection mold core is formed conically and has an inclined portion corresponding to a demolding angle on its outer side to support demolding of the injection-molded hollow body, and the at least one injection mold core has at least one protruding area, and the protruding area has an inclined angle different from the demolding angle to form a release area of ​​the injection-molded hollow body surrounding the at least one through hole.

[0019] As mentioned above, the injection molded hollow body can be used, for example, as a housing for an adjustable fluid distributor, in particular a rotary valve, which can be part of a thermal management system for a vehicle. Such thermal management systems can be used for vehicles with internal combustion engines, fuel cell vehicles, battery-powered vehicles and plug-in hybrid vehicles.

[0020] By providing a release area around the through hole in the peripheral wall of the injection molded hollow body, the construction of the injection molding tool or device for injection molding and thus the production of such an injection molded hollow body can also become more cost-effective, because the corresponding shape of the release area is already preformed in the injection mold core, so no further measures are required to create the corresponding release area. In particular, the injection molded hollow body can be demoulded well after production without providing forced demoulding. Since separation burrs are avoided in particular in the transition area to the through hole in the peripheral wall of the injection molded hollow body, the service life of an adjustable fluid distributor using such an injection molded hollow body can be significantly increased compared to the solutions of the prior art, because seals and other soft components and valve bodies are damaged by the scratching of such separation burrs. This also reduces the maintenance work of such an adjustable fluid distributor.

[0021] All surfaces relevant for demoulding, such as at least one relief area around a corresponding through-hole in the peripheral wall of the injection-molded hollow body, are already formed in the injection mold core or its geometry, so that no further reworking of the injection-molded hollow body is necessary. Compared to prior art solutions, this also makes it possible to save costs that would otherwise have to be spent on removing undesirable separation burrs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to explain the present invention in more detail, the embodiments of the present invention are described in more detail below with reference to the accompanying drawings. As shown in the drawings:

[0023] Figure 1 shows a side view of an injection-molded hollow body according to the utility model,

[0024] Figure 2 Shown according to Figure 1 A longitudinal sectional view of an injection molded hollow body along line AA, showing three release areas according to the invention around three through holes in the peripheral wall of the injection molded hollow body,

[0025] Figure 3 Shown according to Figure 1 A perspective top view of an injection molded hollow body,

[0026] Figure 4 The enlarged detail of two adjacent release areas marked with Z around two through-holes in the peripheral wall of the injection-molded hollow body shows the Figure 2 Detailed cross-sectional view of an injection molded hollow body,

[0027] Figure 5 A perspective view of a rotary valve according to the present invention is shown, wherein the rotary valve comprises a housing according to Figure 1 The injection molded hollow body and the valve body inside it,

[0028] Figure 6 Shown according to Figure 5 Side view of a rotary valve,

[0029] Figure 7 Shows Figure 6 The longitudinal section view of the rotary valve along line BB is shown.

[0030] Figure 8a Shows Figure 7 Detailed cross-sectional view of the rotary valve in area F,

[0031] Figure 8b Shows Figure 7 Detailed cross-sectional view of the rotary valve in the middle E zone,

[0032] Fig. 9 Shown with Figure 6 The side view shown is rotated 45° compared to the Figure 5 Side view of a rotary valve,

[0033] Fig.10 Shown according to Fig. 9 Longitudinal section view of the rotary valve along line CC,

[0034] Fig.11a Shows Fig.10 Detailed cross-sectional view of the rotary valve in area H,

[0035] Fig.11b Shows Fig.10 Detailed cross-sectional view of the rotary valve in region G,

[0036] Fig.12a Shown according to Figure 5 A perspective view of the seal of the valve body of a rotary valve,

[0037] Figure 12b Shown according to Fig.12a A perspective view of a seal of the embodiment of the present invention, wherein the seal is bent according to the arrangement on the valve body,

[0038] Fig.13 Shown according to Figure 5 A perspective view of a valve body of a rotary valve, which is provided according to Fig.12a and Figure 12b Seals,

[0039] Fig.14 Shown according to Fig.13 A first side view of a valve element,

[0040] Fig.15 Shown according to Fig.13 A longitudinal cross-sectional view of the valve element along line DD,

[0041] Fig.16 Shown according to Fig.13A cross-sectional view of the valve element along line KK,

[0042] Fig.17 Shown according to Fig.14 The first side view is rotated 90° according to Fig.13 A second side view of the valve body,

[0043] Fig.18 Shown according to Fig.14 The first side view is rotated 180° according to Fig.13 A third side view of the valve body, and

[0044] Fig.19 Shown according to Fig.13 Top view of the valve body. DETAILED DESCRIPTION

[0045] Figures 1 to 3 1 shows an injection molded hollow body 1. It has a peripheral wall 10, in which four first through holes 11, second through holes 12, third through holes 13, and fourth through holes 14 are arranged. Four connecting sleeves are arranged on the outer side 15 of the circumferential peripheral wall 10 of the injection molded hollow body 1, namely, a first connecting sleeve 16, a second connecting sleeve 17, a third connecting sleeve 18, and a fourth connecting sleeve 19, each of which covers a corresponding first through hole 11, a second through hole 12, a third through hole 13, and a fourth through hole 14. The medium pipeline can be connected to the first connecting sleeve 16, the second connecting sleeve 17, the third connecting sleeve 18, and the fourth connecting sleeve 19, but this is not shown in the figure.

[0046] Especially from Figure 2 and Figure 3As can be seen in the figure, the corresponding relief areas 21 are arranged in a passepartoutsartig-like manner on the inner side 20 of the injection-molded hollow body 1 around each of the four through holes, namely the first through hole 11, the second through hole 12, the third through hole 13, and the fourth through hole 14. The relief areas 21 around the first through hole 11, the second through hole 12, the third through hole 13, and the fourth through hole 14 are used to avoid damage to surfaces located there or in contact, in particular seals, due to burrs formed when such an injection-molded hollow body 1 is demoulded, that is, when an injection mold core is removed, wherein the injection mold core is arranged in the injection mold outer mold during the injection molding process of the hollow body and is removed from it again after the injection molding process. The release area 21 is such that preferably no separation burrs or burrs remain on the inner side 20 of the injection-molded hollow body 1, and separation burrs in the region of the first through hole 11, the second through hole 12, the third through hole 13, the fourth through hole 14 do not have a negative impact by damaging the surfaces of elements in contact with them (such as seals and other elements) because these surfaces are no longer in contact with them because they are deflected in a direction away from these surfaces by the release area 21. This will be referred to below Figure 7 , 8a, 8b, 10, 11a, 11b are explained in more detail.

[0047] from Figure 2 As can be seen from the figure, the injection molded hollow body 1 is designed to be slightly conical, and its peripheral wall 10 has a demoulding angle β relative to the vertical line S. The vertical line S extends in the direction of the vertical axis of the injection molded hollow body 1 or is parallel to it. Figure 2 and Figure 4 middle Figure 2 The enlarged detailed view of the detail Z shows that the release area 21 has a different inclination or draft angle α from the remaining inner side 20 of the peripheral wall 10 of the injection-molded hollow body 1, which has a draft angle β, where α≠β. Both the draft angle β and the inclination / draft angle α are measured relative to the vertical line S, which is also in the Figure 2 and Figure 4 In particular, Figure 2 It can be seen that the inclination / demolding angle α of the release area 21 is smaller than the demolding angle β of the remaining inner side 20 of the peripheral wall 10 of the injection-molded hollow body 1, so that α<β. In particular, the inclination / demolding angle α can be 0° to 2.5°, for example 1.5° to 2°, relative to the vertical line S. Therefore, the inclination / demolding angle α can also extend in the direction of the vertical line S and can therefore be 0°. This is consistent with Figure 2 The situation is substantially the same in the example shown. The draft angle β of the peripheral wall 10 on the inner side 20 of the injection-molded hollow body 1 is usually 2° to 3° relative to the vertical line S.

[0048] from Figure 4It can be seen particularly clearly in the figure that the surface of the relief region 21 with its inclination / draft angle α and the remaining surface on the inner side 20 of the peripheral wall 10 of the injection-molded hollow body 1 converge or merge with each other at the draft angle β, namely at the first end 210 of the relief region 21 marked by an approximately horizontal line in the figure. At the first end 210 of the relief region 21, it has its minimum depth and transitions into the surrounding peripheral wall 10, while it has its maximum depth T at the opposite second end 211. max , which is also in Figure 4 This is the deepest section 216 of the release region 21. At this time, the inner diameter d of the conical injection-molded hollow body 1 is smaller than the inner diameter d of the first end 210 region of the release region 21 (see Figure 2 ). The relief area 21 is obviously designed as a depression, which has a bottom with an inclination / demolding angle α, which is penetrated or interrupted by the first through hole 11 or the second through hole 12 or the third through hole 13 or the fourth through hole 14. Figure 2 and Figure 4 This can also be clearly seen in .

[0049] The transition region 212 from the respective release region 21 to the inner side 20 of the peripheral wall 10 of the injection-molded hollow body 1 surrounding it is rounded, chamfered or tangentially continuous, as also shown in FIG. Figure 2 and Figure 4 As shown. In this way, the formation of burrs can be effectively avoided, because when the release area 21 is formed by a corresponding injection molding tool or injection mold core, these corresponding roundings or chamfers can already be formed in the transition area 212. Even when the injection molded hollow body 1 is removed from the mold, no separation burrs will appear in this area.

[0050] The respective relief area 21 measured between the first through hole 11 or the second through hole 12 or the third through hole 13 or the fourth through hole 14 and the respective adjacent distal edge 213 of the relief area 21 has a b of at least 0.5 mm at its narrowest point, for example. min , in particular a width of bmin=0.5 to 3 mm.

[0051] In the transition region 212 , the radius of curvature R may be, for example, at least R0.05, in particular R0.05 to R5.0. Such a radius of curvature is sufficient to avoid the formation of burrs.

[0052] Figures 5 to 7 , Fig. 9 and Fig.10 2 shows a rotary valve 3 formed by an injection molded hollow body 1. In addition to the injection molded hollow body 1, which forms the housing of the rotary valve 3, the rotary valve 3 also includes a valve body 30 arranged in the interior 22 of the injection molded hollow body 1, as shown in particular in Figure 7 and Fig.10As shown. The valve body 30 disposed in the injection-molded hollow body 1 is also Figures 13 to 19 . The valve body 30 has two first wall sections 31 and second wall sections 32 which are spaced apart from each other and are generally circular in plan view. The two wall sections, namely, the first wall section 31 and the second wall section 32, are connected to each other by a substantially disc-shaped wall portion 33 which extends substantially perpendicularly thereto between the first wall section 31 and the second wall section 32. Thus, the wall portion 33 divides the valve body 30 into two chambers. In particular, Fig.15 It can be seen from FIG. 1 that the valve body 30 is designed in one piece, so that the first wall section 31 , the second wall section 32 and the wall portion 33 are in one piece.

[0053] The first wall section 31, the second wall section 32 and the wall portion 33 all have a first groove 34, a second groove 35, a third groove 36, a fourth groove 37 and a fifth groove 38 on the outer side, into which the seal 4 is inserted. Fig.12a and 12b In particular, Fig.12a As can be seen in FIG. 4 , the seal 4 is designed as a frame having two spaced-apart first longitudinal sections 41, a second longitudinal section 42, two first connecting webs 43 connecting the longitudinal sections at the end sides, a second connecting web 44 and a substantially central intermediate web 40. After the seal 4 has been bent, as shown in FIG. Figure 12b As shown, the intermediate web 40 is inserted into the third groove 36 of the wall portion 33, the two first connecting webs 43 and the second connecting web 44 connecting the first longitudinal section 41 and the second longitudinal section 42 to each other are inserted into the two grooves of the wall portion 33, namely, the fourth groove 37 and the fifth groove 38, and the first longitudinal section 41 and the second longitudinal section 42 are inserted into the two circumferential first grooves 34 and the second grooves 35 of the first wall section 31 and the second wall section 32. This can be particularly Fig.13 , 14, 16, 18.

[0054] Figure 7 and Fig.10 A sectional view of a rotary valve 3 is shown, wherein the areas where the seal 4 contacts the corresponding inner side 20 of the injection-molded hollow body 1 serving as the housing of the rotary valve 3 are denoted by the letters E, F, H and G. The corresponding enlarged views of these areas can be seen in Figure 8a (Region F), Figure 8b (Region E), Fig.11a (Region H) and Fig.11b (Region G). Figure 8a and 8b It can be seen that the middle web 40 of the seal 4 arranged in the third groove 36 of the wall portion 33 is directly placed on the inner side 20 of the injection molded hollow body 1. Figure 8a and Figure 8b or Figure 7 In the region shown, such a flat contact of the seal 4 on the inner side 20 of the circumferential wall 10 of the injection-molded hollow body 1 is therefore possible without any problems.

[0055] Fig.11a and 11b The advantages of the release area 21 are shown. In particular, Fig.11b It can be seen that when the seal moves past the third connecting sleeve 18 or its third through hole 13 with its intermediate web 40 or the first connecting web 43 and the second connecting web 44, for example, the seal 4 only abuts on the inside 20 of the peripheral wall outside the release area 21 on the outside. Therefore, any separation burrs remaining during demoulding or its drilling process will not be touched by the seal 4 (here the intermediate web 40) through the further displacement of the third through hole 13 in the peripheral wall 10. The seal 4 only sweeps over its inside 20 in the transition area 212 from the release area 21 to the peripheral wall 10 surrounding it. Therefore, the third through hole 13 is offset outwards from the seal 4, or here with its intermediate web 40, in the direction of the third connecting sleeve 18, or is offset into the peripheral wall 10 due to the arrangement of the release area 21. This can be seen from Fig.11b As can be seen from the area G in FIG. 1 , the release area 21 has a maximum depth T there. max , so the deepest section 216 of the release region 21 is located in this region. Fig.11a The enlarged Fig.10 In the region H in FIG. 1 , it can also be seen that the outer side 45 of the seal 4 is also spaced apart from the third through hole 13 there. Even after the injection molded hollow body 1 has been demoulded from the injection molding tool or the device for producing the injection molded hollow body 1, the separation burrs remain in the region of the third through hole 13, which separation burrs do not come into contact with the outer side 45 of the seal 4. Therefore, when the seal 4 rotates together with the valve body 30 in the injection molded hollow body 1 in the form of a housing of the rotary valve 3, damage to the seal 4 can be safely avoided.

[0056] from Figure 2 It can be seen particularly clearly in FIG. 1 that the relief area 21 has a first rounded corner 214 and a second rounded corner 215 in the peripheral area provided with the rounded or curved transition area 212. The relief area 21 that accommodates or surrounds the individual through holes, i.e., the first through hole 11, the second through hole 12, the third through hole 13 and the fourth through hole 14, can have, for example, a trapezoidal shape with rounded corners in a plan view, similar to FIG. Figure 2 As shown, the shape is a conic section, a parabola, a parabola, a hyperbola or a hyperboloid, or for example a semicircle. The respective selection of the shape of the relief area 21 can depend on the respective application or size of the through hole in the injection molded hollow body and / or its peripheral wall 10 and the shape of the through hole.

[0057] In addition to rotary valves, injection molded hollow bodies can also be used in other adjustable fluid distributors, for example as housings. A device for forming injection molded hollow bodies, and thus a device for injection molding hollow bodies, in particular has an injection mold core, which has a protruding element or a protruding area shaped according to the desired shape of the release area 21.

[0058] The injection-molded hollow body 1 , which is arranged in particular in an adjustable fluid distributor, such as a rotary valve 3 , can be used in a thermal management system of a vehicle, such as a vehicle with an internal combustion engine, a fuel cell vehicle, a battery-driven vehicle or a plug-in hybrid vehicle.

[0059] In addition to the embodiment variants described above and shown in the figures, the injection molded hollow body comprises at least one peripheral wall having an inner side and an outer side and having at least one through hole through the peripheral wall, wherein the at least one peripheral wall has an inclination at least on its inner side at a draft angle relative to the vertical, many other features can be formed, in particular any combination of the features described above, wherein at least one through hole is surrounded by a relief area, the inclination of which differs from the inclination of the peripheral wall on its inner side, in order to offset the through hole into the peripheral wall and thus move it from the surrounding surface on the inner side of the peripheral wall of the injection molded hollow body into the peripheral wall. As a result, the wall thickness of the peripheral wall in the relief area is usually smaller than the wall thickness in the remaining areas of the peripheral wall, at least in the deepest area of ​​the relief area.

[0060] Reference Numbers List

[0061] 1 Injection Molded Hollow Body

[0062] 3 Rotary valve

[0063] 4 Seals

[0064] 10. Wall

[0065] 11 First through hole

[0066] 12 Second through hole

[0067] 13 Third through hole

[0068] 14 Fourth through hole

[0069] 15 Outer side

[0070] 16 First connecting sleeve

[0071] 17 Second connecting sleeve

[0072] 18 Third connecting sleeve

[0073] 19 Fourth connecting sleeve

[0074] 20 Inside

[0075] 21 Release Area

[0076] 22 Internal

[0077] 30 Valve body

[0078] 31 First wall segment

[0079] 32 Second wall segment

[0080] 33 Wall section

[0081] 34 slots

[0082] 35 slots

[0083] 36 slots

[0084] 37 slots

[0085] 38 slots

[0086] 40 Middle web

[0087] 41 first longitudinal section

[0088] 42 second longitudinal section

[0089] 43 First connecting web

[0090] 44 Second connecting web

[0091] 45 Outer side of seal

[0092] 210 First end of release region

[0093] 211 Second end of the release area

[0094] 212 Transition Zone

[0095] 213 Far Edge

[0096] 214 First fillet

[0097] 215 Second fillet

[0098] 216 Release area deepest section

[0099] ɑ Tilt angle / demolding angle

[0100] β Draft angle

[0101] T max Maximum depth of release area

[0102] b min width

[0103] R Radius of curvature

[0104] d inner diameter

[0105] S vertical line

Claims

1. An injection molded hollow body (1), in particular a rotationally symmetrical injection molded hollow body, comprising at least one peripheral wall (10), the peripheral wall having an inner side (20) and an outer side (15) and having a through hole penetrating at least one of the peripheral walls (10), wherein at least one of the peripheral walls (10) has an inclined portion at least on its inner side (20) at a demoulding angle β relative to a vertical line S, It is characterized in that At least one of the through holes is surrounded by a release area (21), wherein, in the release area (21), the inclination angle ɑ of the peripheral wall (10) is different from the inclination angle of the outer side of the release area (21), so as to avoid the formation of burrs in the transition area (212) from the inner side (20) of the peripheral wall (10) to at least one of the through holes, and / or avoid damage to components in contact with the inner side (20) of the peripheral wall (10) of the injection-molded hollow body (1) due to the formation of the burrs.

2. The injection molded hollow body (1) according to claim 1, characterized in that The relief area (21) is formed in the peripheral wall (10) in the form of a recess.

3. The injection molded hollow body (1) according to claim 1 or 2, characterized in that The inclination angle ɑ of the peripheral wall (10) in the release area (21) is smaller than the inclination angle in the area outside this area on the inner side (20) of the peripheral wall (10), in particular, the peripheral wall (10) has an inclination angle ɑ of 0° to 2.5° relative to the vertical line S in the release area (21), and in particular has an inclination angle ɑ of 1.5° to 2° relative to the vertical line S.

4. The injection molded hollow body (1) according to claim 1 or 2, characterized in that The relief area (21) formed in the peripheral wall (10) has a depth T of 0.05 mm to 0.5 mm in the deepest section (216) formed in the peripheral wall (10). max , especially the depth T of 0.1mm max , especially the depth T of 0.2mm max , especially the depth T of 0.3mm max .

5. The injection molded hollow body (1) according to claim 1 or 2, characterized in that: The relief area (21) has a width b of at least 0.5 mm at its narrowest point. min , wherein the through hole and the distal edge (213) of the release area (21) adjacent thereto are measured, in particular, having a width b of 0.5 mm to 3 mm min .

6. The injection molded hollow body (1) according to claim 1 or 2, characterized in that The surface of the relief area (21) having the through hole surrounded by the relief area has the shape of a conical section and / or a trapezoid with rounded corners in a plan view, in particular at least partially the shape of a parabola and / or a parabola, a hyperbola and / or a hyperboloid and / or a semicircle.

7. The injection molded hollow body (1) according to claim 1 or 2, characterized in that The relief region (21), in particular in its section (216) which is formed deepest into the peripheral wall (10), has a curved and / or chamfered transition region (212) and / or a tangentially continuous transition into the peripheral wall (10) surrounding the relief region (21).

8. The injection-molded hollow body (1) according to claim 7, characterized in that The radius of curvature R is at least R0.05, in particular R0.05 to R5.

0.

9. The injection molded hollow body (1) according to claim 1 or 2, characterized in that The injection-molded hollow body (1) is a housing or at least a part of a housing of an adjustable fluid distributor, in particular a rotary valve (3).

10. An adjustable fluid distributor, in particular a rotary valve (3), comprising at least one housing and at least one valve body (30) located in at least one of the housings, wherein the at least one valve body (30) is arranged rotatably and / or displaceably in the housing, and wherein at least one of the housings can be provided with or has at least one connecting pipe sleeve on the outside, It is characterized in that At least one of the housings is formed by an injection-molded hollow body ( 1 ) according to any one of claims 1 to 9 .

11. A device for producing an injection molded hollow body (1) according to any one of claims 1 to 9, the injection molded hollow body having at least one peripheral wall (10) and at least one through hole penetrating the peripheral wall, wherein the device comprises at least one injection mold outer mold and at least one injection mold core, wherein the at least one injection mold core and the at least one injection mold outer mold form a cavity therebetween, into which a plastic material can flow to form the injection molded hollow body (1), wherein, The at least one injection mold core is formed conically and has an inclined portion on its outer side corresponding to the demoulding angle to support the demoulding of the injection molded hollow body (1). It is characterized in that The at least one injection mold core has at least one protruding area, which has an inclination angle different from the demoulding angle to form a relief area (21) of the injection molded hollow body (1) surrounding the at least one through hole.

12. A vehicle, in particular a vehicle with an internal combustion engine, a fuel cell vehicle, a battery-powered vehicle, a plug-in hybrid vehicle, comprising at least one adjustable fluid distributor in a thermal management system of the vehicle, characterized in that The at least one adjustable fluid distributor of the thermal management system comprises an injection-molded hollow body (1) according to any one of claims 1 to 9.

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