DE102013207955A1 - Method for producing a plastic housing component and plastic housing component - Google Patents

Abstract

In order to create a method for producing a plastic housing component for a drive train of a motor vehicle, by means of which a plastic housing component with at least one fastening section for fastening at least one fastening element can be easily manufactured, it is proposed that the method be used to manufacture a base body of the plastic housing component and at least one fastening section of the base body in a single method step by means of a shaping tool, the fastening section comprising at least one receiving opening, into which a fastening element for fixing the same to the fastening section can be inserted in an insertion direction, the fastening section at least one in the insertion direction Receiving opening adjoining undercut section, on which the fastening element to fix the same against the insertion direction shapely is easy to fix.

Description

The present invention relates to a method for producing a plastic housing component for a drive train of a motor vehicle.

In such plastic housing components attachment points are preferably provided to specify in particular hoses, cables and other cables to the plastic housing component can. The attachment points are formed for example by metallic deposits in a plastic base body of the plastic housing component.

The present invention has for its object to provide a method for producing a plastic housing component for a drive train of a motor vehicle, by means of which a plastic housing component with at least one attachment portion for attaching at least one fastener is easy to produce.

This object is achieved according to the invention by a method for producing a plastic housing component for a drive train of a motor vehicle, comprising:
Producing a base body of the plastic housing component and at least one fastening portion of the base body in a single method step by means of a shaping tool, wherein the fastening portion comprises at least one receiving opening into which a fastening element for fixing the same to the fastening portion in an insertion direction can be introduced, wherein the attachment portion at least one includes in the direction of insertion adjoining the receiving opening undercut portion to which the fastening element for fixing, in particular for anchoring, the same against the insertion direction can be fixed in a form-fitting manner.

Due to the fact that, according to the invention, the base body and at least one fastening section are produced in a single method step, the plastic housing component can be manufactured simply and thus preferably also inexpensively.

In one embodiment of the invention can be provided that the base body and the at least one attachment portion are produced in an injection molding process.

In particular, it can be provided that the at least one fastening section can be produced by suitable shaping of the basic body.

It may be favorable if the shaping tool is designed as a negative molding tool.

In one embodiment of the invention, it can be provided that at least one fastening section, in particular at least one undercut section, is formed by means of at least one projection of the forming tool which widens in the direction of the workpiece and / or in an insertion direction of the fastening element.

A projection of the forming tool which widens in the direction of the workpiece is, in particular, a section of the forming tool that projects from a base body of the forming tool and expands starting from the base body.

The at least one projection of the forming tool is preferably surrounded, in particular encapsulated, with the material of the base body in the production of the base body and of the fastening section.

The at least one projection is preferably removed by deformation of the shaping tool and / or by deformation of the plastic housing component from the fastening section, in particular from the undercut section.

For this purpose, the shaping tool and / or the plastic housing component is preferably designed to be elastically deformable at least in sections and / or at least temporarily, in particular prior to complete curing.

It can be provided that the shaping tool comprises two mutually movable shaping halves, which have substantially complementary to each one side of the base body shaped surfaces.

At least one shaping element of the forming tool, in particular at least one projection of a negative forming tool, can preferably be moved relative to one or relative to both shaping halves.

It can be advantageous if at least one shaping element is moved during or after the plastic housing component is removed from the forming tool.

Alternatively or additionally, it can be provided that at least one shaping element is moved, so that the plastic Housing component can be removed from the forming tool.

It can be provided that at least one movable or movable shaping element is connected by means of a coupling element, in particular a spring connection, with the forming tool, in particular with a shaping half of the forming tool.

The at least one shaping element is preferably selectively and / or repeatedly brought into a shaping position and / or in a demolding position.

In one embodiment of the invention can be provided that for removing the plastic housing component from the forming tool first at least one shaping half and then at least one movable arranged on this shaping half shaping element is removed from the plastic housing component.

In particular, it can be provided that for removing the plastic housing component from the forming tool or from the forming tool first at least one shaping half and then at least one with the shaping half coupled forming element, in particular a widening projection, is removed from the plastic housing component.

For example, it can be provided that for removing the plastic housing component from the forming tool first removes at least one shaping half of the plastic housing component and then at least one shaping element from the plastic housing component, in particular from the mounting portion, for example, from the undercut portion pulled out.

Alternatively or additionally, it can be provided that, for removal of the plastic housing component from the forming tool, first at least one shaping element arranged movably on a shaping half and subsequently this shaping half is removed from the plastic housing component.

In particular, it can be provided that at least one shaping element, for example a slider, is movable in a direction which is aligned transversely, in particular perpendicularly, to that direction in which the shaping half is removed from the plastic housing component.

The undercut portion of at least one attachment portion is preferably formed by a transversely, in particular perpendicular, to the direction of introduction of the fastener movable forming member of the forming tool.

Under a receiving opening of the attachment portion is in this specification and the appended claims in particular no through opening in the plastic housing member to be understood such that a transfer of a substance from a first side of the plastic housing member to one of the first side opposite the second side of the plastic housing component is possible. The receiving opening is therefore in particular no hole in the plastic housing component.

In one embodiment of the invention it is provided that by means of a projection of the forming tool to form the at least one receiving opening and by means of at least one movable shaping element of the forming tool at least one extending only on one side of the base passage opening is formed. In particular, no connection between opposite sides of the plastic housing component is formed by means of this passage opening.

By means of the method according to the invention, in particular a plastic housing component for a drive train of a motor vehicle can be produced.

The present invention therefore also relates to a plastic housing component for a drive train of a motor vehicle.

The invention is in this respect the task of providing a plastic housing component, which is simple and inexpensive to produce.

This object is achieved according to the invention by a plastic housing component for a drive train of a motor vehicle which comprises a base body which comprises at least one fastening section, wherein the base body and the at least one fastening section are formed integrally with each other, wherein the at least one fastening section comprises at least one receiving opening, in which a fastening element for fixing the same to the attachment portion in an insertion direction can be introduced, wherein the at least one attachment portion comprises at least one adjoining the receiving opening in the insertion opening undercut portion, on which the fastening element for fixing the same against the direction of insertion can be fixed positively.

The plastic housing component according to the invention preferably has one or more of the features and / or advantages described in connection with the method according to the invention.

The plastic housing component is preferably a one-piece injection-molded component.

In one embodiment of the invention, it is provided that the plastic housing component comprises a housing wall and at least one attachment portion, wherein by means of the housing an inner side and an outer side of the plastic housing component are separated or separable and wherein at least one attachment portion completely on one of the inside or the outside facing side of the housing wall is arranged.

The housing wall thus preferably has no opening in the region of the fastening section, in particular no passage opening (hole).

It may be favorable if the plastic housing component comprises a housing wall and at least one fastening section, an inner side and an outer side of the plastic housing component being separated or separable from one another by means of the housing wall, and at least one fastening section extending away from the housing wall.

At least one fastening section preferably comprises at least one at least temporarily elastic element, in particular in order to elastically deform the receiving opening. Thereby, a fastener can be easily arranged on the attachment portion and removed from the same.

The attachment portion and the housing wall are preferably formed integrally with the base body. In particular, the attachment portion and the housing wall are components of the basic body.

At least one receiving opening is preferably bounded laterally by at least one elastic element of the fastening section. A taken perpendicular to the direction of insertion cross-section of the receiving opening is thereby preferably variable.

At least one undercut section is preferably formed by a cavity in the plastic housing component.

The cavity is preferably open only on one side, i. open only to one side of the plastic housing component. In particular, it can be provided that the cavity is accessible only through the receiving opening.

The cavity is open in particular to an outer side of the plastic housing component.

However, it can also be provided that the cavity is open on both sides. Preferably, however, both openings of the cavity are then arranged on a single side of the plastic housing component, in particular on an outer side of the plastic housing component.

For example, it can be provided that at least one fastening section is designed as a substantially hollow-cylindrical element, in particular a hollow-cylindrical receptacle. In this way, in particular rotationally symmetrical fastening elements can be fastened easily and reliably in the at least one fastening section.

It can be provided that a wall of at least one fastening section comprises at least one recess, in particular a slot-shaped recess. As a result, the attachment portion can preferably be made flexible, elastic or otherwise yielding, in order to be able to remove, in particular, a widening projection of a shaping tool more easily and / or to fix at least one fastening element more easily to the attachment portion and / or to be able to remove it.

The plastic housing component according to the invention is preferably suitable for all sections of a drive train of a motor vehicle, for example as part of an engine, in particular as part of a valve cover, a cylinder head cover or an oil pan.

Furthermore, it may be provided that the plastic housing component is a component of a coupling housing, a transmission housing, a differential housing and / or a drive shaft housing.

Likewise, it can be provided that the plastic housing component is a component of an electric motor and / or a battery housing.

The present invention further relates to a motor vehicle, in particular a passenger car (PKW) and / or a truck (truck), which comprises at least one inventive plastic housing component.

The motor vehicle according to the invention preferably has one or more of the features and / or advantages described in connection with the method according to the invention and / or with the plastic housing component according to the invention.

Furthermore, the method according to the invention for producing a plastic housing component, the plastic housing component according to the invention and / or the motor vehicle according to the invention can have one or more of the features and / or advantages described below:

As a material for the plastic housing component may be provided in particular a thermoplastic material.

In particular, a self-locking fastening element, in particular a cable tie, can be provided as the fastening element.

At least one attachment portion, in particular at least one receiving opening, is preferably dimensioned such that fastening elements can be fixed therein, which can be fixed in conventional plastic housing components in receptacles for M5, M6 or M8 screws.

In the method according to the invention, a positive removal is preferably carried out, that is to say that the plastic housing component partially surrounds the forming tool and can therefore be released from the forming tool only by applying an additional force and / or by deforming the plastic housing component.

The method of the invention is preferably a tool falling method, that is, the plastic housing member is completed when it is removed from the forming tool. Preferably, therefore, only a single power stroke is necessary.

The shaping tool preferably comprises a shaping half formed as a stamp half and a shaping half formed as a die half.

Further preferred features and / or advantages of the invention are the subject of the following description and the drawings of exemplary embodiments.

In the drawings show:

1 a schematic perspective view of a plastic housing component, which comprises two different embodiments of fastening portions;

2 an enlarged view of the area II from 1 ;

3 a partially sectioned enlarged view of the area II 1 ;

4 a schematic sectional view of an injection molding apparatus for producing a plastic housing component, which a fastening portion according to 2 wherein the injection molding apparatus is in an initial state in which an inner space of the injection molding apparatus is empty;

5 one of the 4 corresponding schematic representation of the injection molding apparatus, wherein the interior space is filled with an injection molding material;

6 one of the 5 corresponding schematic representation of the injection molding apparatus, wherein a first shaping half is removed from a manufactured plastic housing component;

7 one of the 6 corresponding schematic representation of the injection molding apparatus, wherein the first shaping half and a shaping member connected to this first shaping half are removed from the plastic housing member;

8th one of the 7 corresponding schematic representation of the injection molding apparatus, wherein both shaping halves and the movable shaping element have been removed from the plastic housing component;

9 an enlarged view of the area IX from 1 ;

10 one of the 4 corresponding schematic sectional view of an injection molding apparatus for producing a plastic housing component, which has a fixing portion according to 9 wherein the injection molding apparatus is in an initial state in which an inner space of the injection molding apparatus is empty;

11 one of the 5 corresponding schematic representation of the injection molding device 10 wherein the interior space is filled with an injection molding material;

12 one of the 6 corresponding schematic representation of the injection molding device 10 wherein a movable forming member is removed in a transverse direction from the plastic housing member;

13 one of the 12 corresponding schematic representation of the injection molding device 10 wherein the movable forming member has been removed from the plastic housing member; and

14 one of the 13 corresponding schematic representation of the injection molding device 10 wherein both shaping halves of the injection molding apparatus together with the movable shaping element are removed from the plastic housing component.

Identical or functionally equivalent elements are provided with the same reference numerals in all figures.

An in 1 shown, as a whole with 100 designated plastic housing member is for example as a valve cover 102 or as a cylinder head cover 104 educated.

The plastic housing component 100 is in particular an injection-molded component 106 , which can be produced with an injection molding apparatus (to be described later).

The plastic housing component 100 includes a main body 108 which is a housing wall 110 includes.

By means of the housing wall 110 of the basic body 108 is in particular an outdoor space 112 from an interior 114 separable.

The interior 114 is in particular a valve chamber of an internal combustion engine, when the plastic housing component 100 as a valve cover 102 is trained.

In the assembled state of an internal combustion engine, which is the plastic housing component 100 includes, it may be advantageous if multiple lines, channels, cables, etc. on the plastic housing component 100 can be determined.

For this purpose, fasteners 116 (please refer 2 ), which are attached to attachment sections 118 the plastic housing component 100 can be determined.

The attachment sections 118 are doing so on the body 108 arranged that attachment of the fasteners 116 at one the outside space 112 facing outside 120 the plastic housing component 100 is possible.

One in the 2 to 8th illustrated first embodiment of a fastening portion 118 includes, for example, a hollow cylindrical receptacle 122 ,

The hollow cylindrical receptacle 122 includes a substantially cylinder jacket wall 124 which is a cavity 126 surrounds.

The recording 122 is aligned so that an axis of symmetry 128 the recording 122 substantially perpendicular to a main direction of extent 129 the housing wall 110 in the area of the attachment section 118 runs.

The recording 122 protrudes in particular from the housing wall 110 path.

On one of the housing wall 110 opposite end 130 the recording 122 is a receiving opening 132 provided through which the cavity 126 is accessible.

Through this receiving opening 132 is a fastener 116 in an insertion direction 134 at least in sections into the cavity 126 recoverable.

The cavity 126 tapers towards the end 130 the recording 122 so that one in the direction of insertion 134 behind the receiving opening 132 arranged undercut section 136 of the fastener 118 is formed.

At the undercut section 136 can the fastener 116 be determined positively.

The recording 122 further comprises two slot-shaped recesses 138 , which are substantially parallel to the axis of symmetry 128 extend and the wall 124 in two opposite wall sections 140 share.

Due to the slot-shaped recesses 138 are the wall sections 140 the recording 122 at least in sections relative to each other and / or relative to a base section 142 the recording 122 movable, in particular elastically deformable.

In particular, the wall sections 140 at the housing wall 110 opposite end 130 the recording 122 be moved away from each other. The size of the receiving opening 132 is thus variable at least to a limited extent.

The size variability of the receiving opening 132 is in particular for the production of the plastic housing component 100 advantageous.

The in the 2 and 3 illustrated attachment portion 118 the plastic housing component 100 is, in particular together with the plastic housing component 100 and / or together with the in 9 illustrated attachment portion 118 , by means of an injection molding device 144 made as follows:
The injection molding device 144 for the production of the plastic housing component 100 includes a forming tool 146 , in particular a negative mold 148 ,

The forming tool 146 includes a first shaping half 150 , in particular a die half, and a second shaping half 152 , in particular a stamp half.

The first shaping half 150 comprises a shaping element 154 which is a head start 156 the first shaping half 150 forms.

The shaping element 154 is in particular relative to a basic body 158 the first shaping half 150 movably formed.

The lead 156 includes a widening section 160 ,

Thus, the lead is 156 an expanding lead 156 , relative to one of the main body 158 directed extension direction 162 of the projection 156 ,

The forming tool 146 has one of the first shaping half 150 and the second shaping half 152 surrounded interior 164 on, which is a substantially the plastic housing component to be produced 100 has corresponding shape. By filling the interior 164 with an injection molding material can thus the plastic housing component 100 be formed (see 5 ).

In particular 5 can be seen, embraces that in the interior 164 produced plastic housing component 100 by the end 130 the recording 122 the expanding lead 156 ,

The lead 156 thus can not easily from the cavity 126 the recording 122 be removed.

As 6 is to be found, is the projection 156 , which by the movable shaping element 154 is formed, not fixed to the main body 158 the first shaping half 150 but by means of a coupling element 166 with the main body 158 the first shaping half 150 connected.

The coupling element 166 is in particular a spring element 168 ,

Thus, the main body 158 the first shaping half 150 from the plastic housing component 100 be removed while the projection 156 first still in the cavity 126 the recording 122 the plastic housing component 100 remains (see 6 ).

After the wall 124 the recording 122 no longer of the main body 158 the first shaping half 150 surrounded, the wall sections can 140 the recording 122 be elastically deformed to the receiving opening 132 to enlarge. That's the lead 156 forming movable shaping element 154 can thus through the receiving opening 132 through from the cavity 126 the recording 122 be removed (see 7 ).

After removal of the movable forming element 154 from the cavity 126 the recording 122 the preferably elastic wall sections move 140 automatically return to the original position, so that the recording 122 again the interior 164 of the forming tool 146 appropriate form assumes.

By means of the injection molding device 144 Thus, a fastening section can be particularly simple 118 for fastening fasteners 116 be formed, in particular in a single process step, during the manufacture of the plastic housing component 100 ,

An in 9 illustrated alternative embodiment of a mounting portion 118 is different from the one in the 2 to 8th illustrated embodiment essentially in that the recording 122 is not cylindrical and the cavity 126 the recording 122 is accessible on both sides.

At the in 9 illustrated embodiment of the attachment portion 118 is a receiving opening 132 provided through which the cavity 126 is accessible.

Furthermore, one with respect to the introduction direction 134 in which a fastener 116 in the receiving opening 132 einbringbar is, laterally on the recording 122 arranged lateral opening 170 provided through which the cavity 126 is also accessible.

By means of the receiving opening 132 , the side opening 170 and the cavity 126 is thus a passage opening 172 educated.

The passage opening 172 extends exclusively to the exterior space 112 facing outside 120 the plastic housing component 100 , In particular, by means of the passage opening 172 no the interior 114 and the outside space 112 interconnecting hole in the plastic housing component 100 educated.

The undercut section 136 for the positive fixing of a fastener 116 at the reception 122 arises at the in 9 illustrated embodiment of the attachment portion 118 in that the cavity 126 the recording 122 , which with respect to the direction of introduction 134 behind the receiving opening 132 is arranged, has a larger cross section than the receiving opening 132 even.

The in 9 illustrated attachment portion 118 is made as follows:
By means of the injection molding device 144 will injection molding material in the interior 164 of the forming tool 146 filled (see 10 and 11 ).

To form the fastening section 118 according to 9 is a movable forming element 154 , in particular a slide element 174 , provided, which in the in 10 illustrated shaping position with a projection 156 the first shaping half 150 of the forming tool 146 is in contact.

By means of the movable shaping element 154 and the projection 156 becomes a bridge of the first shaping half 150 educated.

The between the forming halves 150 . 152 existing interior 164 is filled with the injection molding material.

In particular 11 can be seen, this leads to the fact that the movable shaping element 154 with respect to the demoulding directions 176 in which the shaping halves 150 . 152 from each other and from the plastic housing component 100 are removable from the plastic housing component 100 is surrounded.

As long as the forming element 154 is arranged in the shaping position, a movement of the shaping element 154 together with the main body 158 the first shaping half 150 thus damaging the plastic housing component 100 to lead.

To avoid such damage, the movable forming element 154 therefore in a transverse, in particular vertical, to Entformungsrichtung 176 aligned transverse direction 178 moved and thereby of the plastic housing component 100 removed (see 12 ).

Once the movable forming element 154 in the 13 has reached demolding shown, the movable forming element 154 together with the main body 158 the first shaping half 150 in the demoulding direction 176 moved and removed from the plastic housing component 100 be removed without damaging the plastic housing component 100 to fear.

Incidentally, the equivalent in the 9 to 14 illustrated embodiment of the attachment portion 118 in terms of structure, function and manufacturing process in the 2 to 8th illustrated embodiment, so that reference is made to the above description thereof.

Due to the fact that in the described plastic housing component 100 in a process step, both the main body 108 the plastic housing component 100 as well as the attachment sections 118 can be made, the plastic housing component 100 be made particularly simple and inexpensive.

Claims (16)

Method for producing a plastic housing component ( 100 ) for a drive train of a motor vehicle, comprising: producing a basic body ( 108 ) of the plastic housing component ( 100 ) and at least one fastening section ( 118 ) of the basic body ( 108 ) in a single process step by means of a forming tool ( 146 ), wherein the attachment section ( 118 ) at least one receiving opening ( 132 ) into which a fastener ( 116 ) fixing it to the attachment section ( 118 ) in an insertion direction ( 134 ) is insertable, wherein the attachment portion ( 118 ) at least one in the direction of insertion ( 134 ) to the receiving opening ( 132 ) subsequent undercut section ( 136 ), on which the fastening element ( 116 ) for fixing the same against the introduction direction ( 134 ) is positively fixed. Method according to claim 1, characterized in that the basic body ( 108 ) and the at least one attachment section ( 118 ) are produced in an injection molding process. Method according to one of claims 1 or 2, characterized in that the forming tool ( 146 ) as a negative mold ( 148 ) is trained. Method according to one of claims 1 to 3, characterized in that at least one attachment portion ( 118 ), in particular at least one undercut section ( 136 ), by means of at least one in the direction of insertion ( 134 ) of the fastener ( 116 ) expanding projections ( 156 ) of the forming tool ( 146 ) is formed. Method according to claim 4, characterized in that the at least one projection ( 156 ) by deformation of the forming tool ( 146 ) and / or by deformation of the plastic housing component ( 100 ) from the attachment section ( 118 ), in particular from the undercut section ( 136 ), Will get removed. Method according to one of claims 1 to 5, characterized in that the forming tool ( 146 ) two relatively movable shaping halves ( 150 . 152 ) which is substantially complementary to one side of the main body ( 158 ) have shaped surfaces, and that at least one shaping element ( 154 ) of the forming tool ( 146 ), in particular at least one projection ( 156 ) of a negative mold ( 148 ), relative to or relative to both forming halves ( 150 . 152 ) is moved. A method according to claim 6, characterized in that for removing the plastic housing component ( 100 ) from the forming tool ( 146 ) first at least one shaping half ( 150 . 152 ) and then at least one movable on this shaping half ( 150 . 152 ) arranged shaping element ( 154 ) of the plastic housing component ( 100 ) Will get removed. Method according to one of claims 6 or 7, characterized in that for removing the plastic housing component ( 100 ) from the forming tool ( 146 ) at least one movable on a shaping half ( 150 . 152 ) arranged shaping element ( 154 ) and then this shaping half ( 150 . 152 ) of the plastic housing component ( 100 ) Will get removed. Method according to one of claims 1 to 8, characterized in that the undercut section ( 136 ) at least one fastening section ( 118 ) by a transversely, in particular vertically, to the introduction direction ( 134 ) of the fastener ( 116 ) movable shaping element ( 154 ) of the forming tool ( 146 ) is formed. Method according to one of claims 1 to 9, characterized in that by means of a projection ( 156 ) of the forming tool ( 146 ) for forming the at least one receiving opening ( 132 ) and by means of at least one movable shaping element ( 154 ) of the forming tool ( 146 ) at least one only on one side of the body ( 108 ) extending passage opening ( 172 ) is formed. Plastic housing component ( 100 ) for a drive train of a motor vehicle, comprising a base body ( 108 ), which has at least one attachment section ( 118 ), wherein the basic body ( 108 ) and the at least one attachment section ( 118 ) are formed integrally with each other, wherein the at least one attachment portion ( 118 ) at least one receiving opening ( 132 ) into which a fastener ( 116 ) fixing it to the attachment section ( 118 ) in an insertion direction ( 134 ), wherein the at least one attachment portion ( 118 ) at least one in the direction of insertion ( 134 ) to the receiving opening ( 132 ) subsequent undercut section ( 136 ), on which the fastening element ( 116 ) for fixing the same against the introduction direction ( 134 ) is positively fixed. Plastic housing component ( 100 ) according to claim 11, characterized in that the plastic housing component ( 100 ) a housing wall ( 110 ) and at least one attachment section ( 118 ), wherein by means of the housing wall ( 110 ) an inside and an outside ( 120 ) of the plastic housing component ( 100 ) are separated or separable and wherein at least one attachment portion ( 118 ) completely on one of the inside or the outside ( 120 ) facing side of the housing wall ( 110 ) is arranged. Plastic housing component ( 100 ) according to one of claims 11 or 12, characterized in that the plastic housing component ( 100 ) a housing wall ( 110 ) and at least one attachment section ( 118 ), wherein by means of the housing wall ( 110 ) an inside and an outside ( 120 ) of the plastic housing component ( 100 ) are separated or separable and wherein at least one attachment portion ( 118 ) from the housing wall ( 110 ) extends away. Plastic housing component ( 100 ) according to one of claims 11 to 13, characterized in that at least one Undercut section ( 136 ) through a cavity ( 126 ) in the plastic housing component ( 100 ) is formed. Plastic housing component ( 100 ) according to one of claims 11 to 14, characterized in that at least one fastening section ( 118 ) as a substantially hollow cylindrical receptacle ( 122 ) is trained. Motor vehicle comprising at least one plastic housing component ( 100 ) according to any one of claims 11 to 15.

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