WO2012126907A1

WO2012126907A1 - Method for producing a composite component

Info

Publication number: WO2012126907A1
Application number: PCT/EP2012/054902
Authority: WO
Inventors: Manfred Nawroth; Patrick Rosso; Jana Moll
Original assignee: Bayer Materialscience Ag
Priority date: 2011-03-24
Filing date: 2012-03-20
Publication date: 2012-09-27
Also published as: DE102011006034A1; JP2014512282A

Abstract

The invention relates to a method for producing a composite component (2, 2.1, 2.2) using an injection moulding tool, in which method at least one moulded part (4, 4.1) is provided and said moulded part (4, 4.1) is back-moulded with a first plastic melt (6) using at least one injection device (18). The method is characterised in that the moulded part (4, 4.1) is back-moulded with the first plastic melt (6), using the injection device (20), and through at least one recess (8) in the moulded part (4, 4.1).

Description

Method for producing a composite component

The invention relates to a method for producing a composite component with an injection molding tool, comprising at least one molding, and

Injection molding of the molding with a first

Plastic melt by at least one In ektionseinrichtung. In addition, the invention relates to a composite component produced by this method and an injection molding tool for carrying out this method.

At the present time, in various fields of technology, e.g. in buildings, in screens or in vehicles, more plastic products, w i e

Plastic washers, used. For example, in vehicle construction it is a continuous concern to reduce the weight of a vehicle, such as a motor vehicle, rail vehicle or aircraft. A possibility of

Weight reduction consists in replacing the glass panes of a vehicle with lighter plastic cloths.

Plastic discs may be composite components which have at least two components. A first component may be a molded part, such as a transparent molded part. The second component can be formed by injection molding the molding with a plastic melt. This composite component can be made transparent or translucent depending on the intended use later. From the prior art, such as DE 201 21 744 Ul or DE 10 2005 032 664 Al, such composite components are known which are produced by injection molding and can be used as a disc in a vehicle.

In order to produce a composite component, it is also known to introduce a molded part in a suitable injection mold and then to inject this in the closed state of the injection mold with a suitable Kunstoffoffschmelze, so that the plastic melt and the molding cohesively connect with each other. In particular, the intermediate space between the molded part and a mold half with a plastic melt is preferably completely filled.

When injecting the molding, it must be ensured during the injection molding process that the plastic melt is clearly positioned in its position relative to the molding. In particular, it is necessary that the casting technique be designed such that the plastic melt is behind the molding during the injection molding process in order to avoid over-molding and wrinkling.

In a conventional injection mold a connection can be made via a cold manifold. Here a tunnel gate with auxiliary pin, a curved tunnel gate or a film gate is used. A disadvantage of these methods is, however, that additional waste arises. Furthermore, it may be necessary for a gate to be separated. Another disadvantage of this method is that there is always a visible mark left on the composite component. This is particularly troublesome for optical components. An alternative method according to the prior art is the so-called direct connection. For example, DE 10 2005 009 007 A1 discloses a method for producing composite components, in which a molded part is partially back-injected by means of a direct connection with a plastic material.

However, such a direct connection brings with it the disadvantage that as a rule the sprue system and the ejector unit are located on the same side of the tool. This in turn is associated with the requirement that long hot runner nozzles must be provided as In ektionseinrichtungen. The associated with a long hot runner high volumes of a plastic melt in the hot runner can lead to thermal degradation of the plastic melt to damage to the same. Furthermore, in the case of a direct connection, a molded part can not be inserted into the mold half, which comprises the injection device. In addition, it is not possible in the direct connection, to inject a plastic melt between two moldings. Finally, an optical marking is also produced in the known direct connection.

The present invention is therefore based on the object of providing a method for producing a composite component, which enables the production of a composite component with improved optics in a simple manner.

According to a first aspect of the invention, the previously derived and disclosed invention is in a method for producing a composite component with an injection molding tool comprising providing at least one molding and back molding of the molding with a first

Plastic melt by at least one Inj ektionseinrichtung solved in that the molding is back-injected through at least one provided in the molding recess through with the first plastic melt.

In contrast to the prior art, it is possible according to the invention by the injection-molding of a molded part with a plastic melt through a recess provided in the molded part to produce in a simple manner a composite component with an improved appearance. The plastic melt is thus injected by a arranged on a first side de s molding in ektionseinrichtung by a recess in the molding on the other side of the molding.

First of all, a molding such as e.g. an artificial fabric molding. The molded part can be of any shape and in particular also have a complex shape.

In addition, the shaped part has at least one recess, that is to say a recess or opening. The shape and size of the recess can basically be chosen arbitrarily, as long as it is ensured that a Kunstoffoffschmelze can be injected by means of a In ektionseinrichtung through the recess. It is understood that two or more recesses may be provided in the molded part. The number of recesses may depend on the size of the molded part and / or the number of injection devices. A suitable nozzle, such as a hot runner nozzle, may be provided on the injection device. By means of the method according to the invention, a molding with improved optical properties can be produced with little effort in a ser manner, ie without overspraying and / or wrinkling. In particular, a direct connection can be provided which does not have the disadvantages of the prior art. The molding can be placed on the In ektionseinrichtungswerkzeugseite the injection mold. In principle, it is possible to use as the first article of manufacture a material which enables a materially bonded connection to the molded part. According to a first embodiment of the method according to the invention, at least the first plastic melt can be made of a transparent plastic material. A transparent plastic material is particularly suitable for use in plastic discs. For example, the first plastic melt may be made of polycarbonate (PC), polymethyl methacrylate (PMMA), transparent polyamide (PA), cyclo-olefin copolymer (COC). It is understood that for the plastic melt eder other thermoplastic material can be used, which is suitable for injection molding. In addition, according to a further embodiment, the molded part may be made of a transparent plastic material or of a partially transparent plastic material. For example, the molding may be made of polycarbonate (PC), polymethylmethacrylate (PMMA) or a polycarbonate-polymethylmethacrylate blend. These

Materials are particularly suitable for use in an at least partially transparent composite component. The molded part may according to another embodiment be a film, such as a plastic film. The film may for example have a thickness of 0, 1 to 1 mm. The film may be a single layer or a multilayer or a multi - layered film. multi-layered film act. A multilayer film may be formed of the same or different materials as long as the materials are suitable for an injection molding process. In order to provide a composite component with at least one integrated function or property, in particular the molded part can be a functional film. For example, a functional film may include heaters, antennas, colors, logos, lights, switches, and / or photovoltaic elements. In addition, the functional film may be scratch resistant and / or suitable for infrared (IR) reflection and / or ultraviolet (UV) blocking.

In principle, the at least one recess can be provided at any position of the molded part. For example, a recess in the central region of the molding or on the edge, such as in the form of a bulge in the edge itself, be provided. Preferably, the recess may be provided in accordance with an embodiment of the invention in an edge region of the molded part, If two of the more recesses are provided in the molded part, preferably each recess may be provided in the edge region. In particular, the edge region may be a region of the composite component that is not visible in the installed state. For example, the edge region in the installed state can be covered by another element or another layer. In other words, the recess is arranged in the molded part such that it is in the installed state is not visible. A composite component with particularly good optical properties can be produced.

Further, the recess may have a predeterminable distance to the edge of the molding, so be completely surrounded by the molding. In this way, it may be possible to additionally use the recess as a suspension option for hooking the molded part into the injection molding tool. Furthermore, in another injection molding step, a further plastic melt can be applied to the composite component. According to a further embodiment of the method according to the invention, at least the recess in the molded part after the back molding with the first plastic melt can be back-injected with a second plastic melt, At least the Au snooping can be covered for optical reasons. Preferably, according to a further embodiment, the (entire) edge region of the molded part can be back-injected with the second plastic melt. The molding is back-injected from both sides.

As a second plastic melt, basically any material can be used which can be cohesively connected to the molded part. For example, as the material, a thermoplastic material may be used, such as thermoplastic polyurethane (TPU), thermoplastic polyethylene (TPE), PC blends or PVC. The material may in particular be colored. A colored material can cover the at least one recess. The recess is therefore not visible. The second plastic melt also allows the molding of fasteners or the like. In a further embodiment of the method according to the invention, the recess in the molded part can be shaped such that the shape of the recess corresponds to a shape of an ineffective core of the injection device. The In ektionseinrichtungskern, so an end of In ektionseinrichtung, may have a projection. The injector core thus faces the other tool halls. In this case, the injection unit core or the injection unit core can be used. the projection of the injector core has a circumferential shape corresponding to the shape of the recess. In other words, depending on the shape of the injector core, the at least one outer recess may be formed. This allows the molding to be hung on the mold half having the injection device.

In addition, according to a further embodiment, the recess may correspond in the molded part to the injection device core of the injection device in such a way that the injection element core of the injection device can be positively connected to the molded part. A positive connection is particularly preferred since no further holding devices for holding the molded part during the injection molding process are required.

For example, a molded part in the form of a Fol ie be hanged in a simple manner on at least one Inj ektionseinrichtungskern without the further holding device are provided. This reduces the complexity of the injection molding tool and can increase the production rate. The molding may have a thickness such that the value of a projection of the injection device core of the injection device is equal to the value of the thickness of the molding or greater than the value of the thickness of the molding according to another embodiment of the method of the present invention. The thickness of the molded part is understood in particular to be the value which results at the edges of the at least one recess of the molded part. It is understood that this value does not have to be constant. The In ektionseinrichtungskern, for example, complete flush with the molding. The molded article 1 and the injector core may form a unitary surface. The first plastic melt can then flow behind the molding without overspray or wrinkling occurring. It is understood that the Inj ektionseinrichtungskern can also protrude through the recess of the molding, so the projection of the Inj ektionseinrichtungskerns is greater than the thickness of the molding. Preferably, the projection of the

Injection core j edo ch n icht be formed less than the thickness of the molding.

In addition, for holding the molded part, a negative pressure can be generated in a mold half having the injection device. Due to the negative pressure, a molded part can be held in a simple manner during the injection molding process.

According to a further embodiment of the method according to the invention, at least one further molded part can be provided. The first plastic melt can be back-injected between the two mold parts through the recess provided in a molded part. The further molding can be made be formed of the same material as the molding or of another material. For example, two functional films can be provided to integrate additional functions in a composite component. The back-injection of the two molded parts by at least one recess provided in at least one molded part enables the production of a composite component in a particularly simple manner.

Another aspect of the invention is a composite component made by a previously described method. As already stated, the composite component can have particularly good optical properties.

According to a further embodiment, the composite component can in particular be a plastic disk. The

Plastic disc can be used in particular in a vehicle.

For example, plastic windows in the window and Verscheibungsbereich, in lighting applications, opti see lenses, headlamps, in non-transparent, to achieve a depth effect surface with transparent thermoplastic as Hochglanz- layer hinterspritzten decorative covers, (backlit) panels in the car or monitor / display covers be used.

Yet another aspect of the invention is an injection molding tool for performing the method described above with a first tool half and a second tool half. In a tool half is at least one In ektionseinrichtung for injection molding at least one Form part arranged by at least one provided in the molding recess.

The injection molding tool, such as a 2-component injection molding machine, has two mold halves that can be moved between a closed state and a closed state. When closed, the injection molding process can be Runaway leads. For this purpose, at least one injection device is provided in a mold half. The injection mold, in particular the In ektionseinrichtung, is formed such that in the closed state, a first plastic melt is injected through a recess in the molded part behind the molding. The injection molding tool can in particular have a (single) production cell. In a simple way, a visually appealing composite component can be produced with the injection molding tool.

According to a first embodiment of the injection molding tool according to the invention, e e n e F o rm e i n e s

Inj ectionseinrichtungskerns the Inj ektionseinrichtung correspond to the shape of the recess in the molding.

According to yet another embodiment of the injection molding tool according to the invention, at least one opening for generating a negative pressure for holding the molded part can be arranged in at least one mold half. This at least one opening can be coupled to an air pressure system, so that a negative pressure can be generated in a simple manner.

Alternatively or additionally, at least one tool half made of a porous tool steel, in particular made of sintered steel. About this porous tool steel, the negative pressure for fixing the molding can be transported to the surface. The advantage here is that due to the small cross-sectional area of the pores on the tool surface there is no risk that, in the event of incorrect positioning of the molded part, melt (via the pores) can penetrate into the tool.

There are now numerous possibilities for designing and further developing the method according to the invention for producing a composite component, the composite component according to the invention and the injection molding unit according to the invention. For this purpose, reference is made, on the one hand, to the claims subordinate to the independent patent claims, and, on the other hand, to the description of exemplary embodiments in conjunction with the drawing. In the drawing shows:

Fig. 1 is a schematic exploded view of a first

Embodiment of a composite component according to the present invention;

Fig. 2 is a schematic exploded view of a second

Embodiment of a composite component according to the present invention;

Fig. 3 is a s chema t i s che sectional view of the second

Embodiment of a composite component according to the present invention; Fig. 4 is a schematic Teila view of a

Embodiment of an injection mold in the closed state according to the present invention;

Fig. 5 is a schematic partial view of another

Embodiment of an injection mold in the closed state according to the present invention; a flowchart of a Ausführungsbei game s a method for producing a composite component according to the present invention;

Fig. 7 is a schematic view of the second

Embodiment of a composite component according to the present invention;

Fig. 8 is a schematic exploded view of a third one

Embodiment of a composite component according to the present invention;

Fig. 9 is a s chema t i s che sectional view of the third

Embodiment of a composite component according to the present invention; and a schematic partial view of another embodiment of an injection molding tool according to the present invention.

Hereinafter, like reference numerals are used for like elements. FIG. 1 shows a schematic exploded view of a first exemplary embodiment of a composite component 2 according to the present invention. The composite component 2 may in particular be a transparent or partially transparent plastic disc which can be used in a vehicle.

The composite component 2 comprises a molded part 4 and a first synthetic material element 6. As will be explained in more detail below, the first plastic element 6 is connected to the first synthetic material element 4 by an injection molding process.

The molded part 4 and the first plastic element 6 have an octagonal shape. It is understood that the shape of the corresponding elements can basically be the same, and the elements can be, for example, a circular shape, a triangular shape, a rectangular shape, etc. can have. It is further understood that the elements can also have a spatial shape curved at i eb i g.

The molding 4 may be a film, such as a functional film. A functional film is e.g. a plastic film incorporating one or more functions or properties. Examples of functions are heating fields, antennas, colors, logos, lights, switches or photovoltaics. Examples of properties are

Scratch resistance, IR reflectance or UV

Blocking ability. As can also be seen from FIG. 1, the illustrated molding 4 has a recess 8. The recess 8 is arranged in an edge region 10 of the molded part 4. Furthermore, the illustrated recess 8 is formed circular. In principle, the recess 8 may have any desired shape. As will be explained below, the shape of the recess 8 may depend in particular on the shape of an In ektionseinrichtungskerns.

Figure 2 shows a s chemat i see exploded view of a second embodiment of a composite component 2.1 according to the present invention.

In addition to the previously described molded part 4 and the first plastic element 6, the composite component 2.1 has a second plastic element 12. The second plastic element 12 may be provided only in the edge region 10 of the first plastic fabric element 4. In particular, the plastic fabric element 12 may be formed from a colored material. The second plastic element 12 may cover at least one recess 8 such that the recess 8 is not visible. In addition, the second plastic material element 12 may be so shaped that it can serve, for example, for mounting the composite component 2.1. Thus, the plastic fabric element 12 may have projections, extensions and the like.

FIG. 3 shows a sectional view of the composite component 2.1 according to FIG. The composite component 2.1 comprises the three components 4, 6 and 12. The molded part 4 is arranged between the two plastic elements 6 and 12. Furthermore, it can be seen that the second plastic element 12 is arranged in egg NEM edge region. In particular, at least the recess 8 is covered by the second plastic element 12. Figure 4 shows a schematic partial view of a first embodiment of an injection mold in the closed state according to the present invention. As can be seen, in particular a section of the injection mold is shown in the region of the at least one recess 8 of the molded part 4.

The injection mold comprises two tool halves 14 and 16. The machine tool side may be the ejector side and the second tool half 16 may be the ejector side. The ejector side can be movably mounted. In this way, the injection mold can be opened to insert, for example, a plastic film 4 in the first mold half 14 or take out a manufactured composite component 2, 2.1, and closed for an injection molding. Vorl hanging the injection mold is shown in the closed state.

In the first mold half 14 at least one In ektionseinrichtung 18, such as an injection molding, arranged. For example, a hot runner nozzle is provided as in ektionseinrichtung 18. The In ektionseinrichtung 18 further includes an in ektionseinrichtungskern 20 on. This is in particular formed by a projection 26 and represents the end of the In ektionseinrichtung 18.

In addition, in the illustrated tool half 14 openings 22, such as holes, arranged. The orifices 22 may be used with a vacuum system (not shown) to generate a negative pressure. With the help of the negative pressure, for example, a film to be back-injected 4 in a preferably constant Be held in position. Alternatively or additionally, a porous tool steel (sintered steel) can be used for the shown openings 22 for application of a negative pressure, via which the negative pressure for fixing the film 4 to be backfilled is transported to the film surface. The advantage here is that, due to the small cross-sectional area of the pores on the tool surface, there is no risk that, in the event of malpositioning of the film 4, melt (via the pores) can penetrate into the tool.

As already described, the

In ektionseinrichtungskern 20 are formed by a projection 26. The projection 26 of the In ektionseinrichtungskerns 20 I s can extend into the recess 8. In other words, the molding 4 can be mounted on the projection 26 of the In ektionseinrichtungskerns 20. The projection 26 of the In ektionseinrichtungskerns 20 may protrude by an amount relative to the tool half 14, which corresponds at least to the thickness 24 of the molded part 4.

In the present case, the projection 26 terminates in particular flush with the molded part 4, that is, does not protrude or stand back. By flushing the molding 4 with the injector core 20, the position during the injection molding process can be surely maintained. The plastic melt 6 can flow over the molded part 4 and connect cohesively with this. Overspraying and wrinkling can be avoided. According to other variants of the present invention, the projection 26 may also be formed with a larger amount than the thickness of the molding 4. As already described, the projection 26 or. the Inj ektionseinrichtungskern 20 circumferentially the contour of the recess 8 have. Preferably, the molded part 4 enter into a positive connection with the Inj ektionseinrichtungskern 20. For example, a Pas sungsmaß with a tolerance between 0.1 to 0, 5 mm can be selected. In a positive connection, the vacuum holes 22 can be omitted, since a secure holding of the molded part 4 by the positive engagement (without further action) can be ensured. Overjections can be avoided particularly reliably.

Figure 5 shows a partial section of a closed injection mold in an optional further

Injection molding step. By way of example, the composite component 2, which comprises a molded part 4 back-injected with a plastic melt 6, can be introduced into a second cavity. The transfer can be done for example with a turntable, a turning plate, a sliding cavity, an index plate or similar device. The tool half 14.1 again comprises at least one injection device 18.1, such as a hot runner nozzle (if necessary with a sprue). Another plastic melt 12 can be injected behind the first plastic element 6 and the molded part 4. In particular, the sprue area of the previous injection molding step can be covered. Thus, it can be seen from FIG. 5 that at least the recess 8 can be covered with the plastic melt 12. An embodiment of the method according to the invention will be explained in more detail below with reference to FIG. FIG. 6 shows a flow chart of an exemplary embodiment of the injection molding method.

In a first step 601, at least one molded part 4 can be provided. The molded part 4, such as a plastic film, can be introduced into the injection mold. For example, a plastic film 4 can be hung on the at least one in ektionseinrichtungskern 20 and optionally held by suppression in position. Then the injection mold can be closed. It is understood that prior to the provision of the molding 4, this can be preformed, reshaped, trimmed, coated and / or printed accordingly. For example, further elements, such as wires that can serve for heating or as an antenna, can be arranged. In addition, at least one recess 8 can be introduced into the molded part 4. The recess 8 can be formed in particular depending on the circumferential contour of the In ektionseinrichtungskerns 20. In the closed state of the injection molding of Inj ektionseinrichtungskern 20 at least flush with the molding 4 is arranged.

In a next step 602, the molded part 4 is back-injected with a plastic melt 6. The plastic melt 6 flows behind the plastic film 4 and in particular fills the entire area between the second mold half 16 and the plastic film 4 from.

After the plastic melt 6 has firmly bonded to the molded part 4 and cured, the composite component 2 can be removed.

Optionally, in a further step 603, the composite component 2 can be back-injected with a further plastic melt 12. By way of example, the composite component 2 consisting of a molded part 4 that is back-injected with a plastic melt 6 can be converted into a second cavity. Then a further plastic melt 12 can be injected behind the first plastic element 6 and the molded part 4 (step 603). In particular, the gate area of the previous injection molding step 602 can be covered.

It goes without saying that further injection molding steps can follow. Furthermore, it is understood that the composite component 2.1 after removal from the mold can be subjected to further processing steps in order, for example, to create a scratch-resistant and / or weather-resistant composite component 2.1.

FIG. 7 shows a schematic sectional view of the manufactured composite component 2.1.

FIG. 8 shows a further exemplary embodiment of a composite component 2.2 according to the present invention. In contrast to the composite component 2.1 according to FIG. 2, the composite component 2.2 comprises two molded parts 4.1 and 4.2. The molded parts 4.1 and 4.2 may be made of the same material and be designed, for example, as a functional film. At least the molding 4.1 is provided with a recess 8. Preferably, the further molded part 4.2 has no recess. The first plastic element 6 is arranged in the present embodiment between the mold parts 4.1 and 4.2. If two functional films 4.1 and 4.2 are provided as molded parts 4.1 and 4.2, additional functions can be integrated into the composite component 2.2. For example, a disk body can be provided with a double-sided heating, for example, to remove fog from the inside and ice from the outside.

FIG. 9 shows the composite component 2.2 in a sectional view. In particular, it can be seen from FIG. 9 that in the present exemplary embodiment the first plastic element 6 is arranged between the molded part 4.1 and the molded part 4.2.

Figure 10 finally shows a partial section of a closed injection mold with the mold parts 4.1 and 4.2. By the at least one recess 8 in the molded part 4.1, the plastic melt 6 can be injected between the two mold parts 4.1 and 4.2 and connect with the mold parts 4.1 and 4.2 in particular cohesively.

In a further step, not shown, the composite component 2.2 comprising the molded parts 4.1 and 4.2 and the plastic element 6 are back-injected with a further plastic melt 12, as previously described.

Claims

claims

Method for producing a composite component (2, 2.1, 2.2) with an injection molding tool, comprising:

- Providing at least one molding (4, 4.1), and

- Injection molding of the molding (4, 4.1) with a first Kunstoffoffschmelze (6) by at least one

Inj ection Facility (18),

characterized,

in that the molded part (4, 4.1) passes through at least one recess (8) provided in the molded part (4, 4.1) with the first plastic melt (6) through the

In ektionseinrichtung (20) is injected behind.

Method according to claim 1, characterized in that

that at least the first plastic melt (6) is made of a transparent plastic material,

and or

- That the molding (4, 4.1) of a transparent

Plastic material or partially

is transparent plastic material.

A method according to claim 1 or 2, characterized in that the molded part (4, 4.1) is a film, in particular a functional film.

4. The method according to any one of the preceding claims, characterized in that the recess (8) in one

Edge region (10) of the molding (4, 4.1) is provided.

Method according to one of the preceding claims, characterized in that at least the recess (8) in the molded part (4, 4.1) after the back molding with the first plastic melt (6) with a second

Plastic melt (12) is injected behind.

A method according to claim 5, characterized in that the edge region (10) of the molded part (4, 4.1) is back-injected with the second plastic melt (12).

Method according to one of the preceding claims, characterized in that the recess (8) in the molded part (4, 4.1) is shaped such that the shape of the

Recess (8) to a shape of a

In the ection center (20) the

In ektionseinrichtung (18) corresponds.

A method according to claim 7, characterized in that the recess (8) in the molded part (4, 4.1) to the

In ektionseinrichtungskern (20) of the injection device (18) corresponds, such that the

Inj ektionseinrichtungskern (20) of the injection device (18) positively connected to the molding (4, 4.1) is connectable.

9. The method according to claim 7 or 8, characterized in that the molded part (4, 4.1) has a thickness such that the value of a projection (26) of the In ektionseinrichtungskern (20) of In ektionseinrichtung (18) equal to the value of the thickness of the molding (4, 4.1) or greater than the value of the thickness of the molding (4, 4.1).

Method according to one of the preceding claims, characterized in that for holding the molded part (4, 4.1), a negative pressure in a inj ektionseinrichtung (18) having tool half (14) is generated.

11. The method according to any one of the preceding claims, characterized

- that at least one further molded part (4.2)

is provided, and

- That the first plastic melt (6) by the in

a recess (8) provided between a mold part (4.1, 4.2) is back-injected between the two mold parts (4.1, 4.2). 12. composite component (2, 2.1, 2.2) produced by a

Method according to one of the preceding claims.

13. An injection mold for carrying out the method according to one of the preceding claims 1 to 11 with a first mold half (14) and a second mold half

(16),

characterized ,

in that in a tool half (14, 16) at least one injection device (18) for injection molding of at least one molding (4, 4.1) by at least one in the

Molded part (4, 4.1) provided recess (8) is arranged therethrough.

14. Injection mold according to claim 13, characterized in that in at least one tool half (14, 16) at least one opening (22) for generating a negative pressure for holding at least the molded part (4, 4.1) is arranged.

15. Injection mold according to claim 13 or 14, characterized in that at least one tool half (14, 16) is made of a porous tool steel, in particular made of sintered steel.