JP7346521B2 - Method and injection mold for manufacturing plugs - Google Patents

Description

The invention relates to a method for manufacturing a plug of the type according to independent claim 1. The subject of the invention is also an injection mold, which is configured for carrying out a method for manufacturing a plug.

BACKGROUND OF THE INVENTION Various methods are known from the prior art for manufacturing plugs, which plugs have at least two plug-in contact ends and a housing. Here, the at least two plug-in contact ends are arranged at least partially inside the cavity of the housing by a first end. Such methods typically include inserting and positioning a punching grid within a cavity of an injection mold, the punching grid comprising at least two insert contact ends, the insert contact ends inserting and positioning the at least two insert contact ends connected to each other via a punched piece; and extruding and enclosing the at least two insert contact ends using a liquid plastic material, thereby creating a profile of the housing. , aging the plastic material so that the at least two plug-in contact ends are at least partially disposed by a respective first end within the cavity of the manufactured housing; demolding and ejecting. After removing the plug from the injection mold, the plug is inserted into a punching device. The punching device is configured to optionally punch out at least two insert contact ends of the punching grid.

DE 10 2008 064 046 DE 10 20 0 8 064 046 discloses a method for manufacturing an electrical component set, in which interconnected lead frames or carrier strips are punched out as a punched grid and electronic components are installed. After the lead frame or carrier strip is fully loaded, the loaded lead frame or carrier strip is at least partially extruded and encapsulated with a liquid plastic material or molded plastic in an injection mold. Perform an additional plasma treatment step. Here, a plurality of electrical component sets are connected by connecting pieces substantially in the form of chains or strips. After the extrusion encapsulation step, the individual electrical component sets are inserted into a punching tool and separated by a punching step.

From DE 10 2006 030 133 A1, an electrical module unit with a lead frame and a method for manufacturing such an electrical module unit of the type are known. The module unit comprises a conductor grid having one conductor bundle connected via contact strips and at least one surface area, on which an integrated sensor circuit chip (Rohchip) is applied. ing. The insulating housing is formed so that the plurality of conducting wire bundles and the integrated circuit are embedded therein. The starting point for the production of electrical module units is a thin sheet strip, which has lateral transport strips, on which it is transported between different workstations. This means that electrical structural units are formed on the sheet strip at different workstations and are further processed so that after the final processing step, a produced electrical module unit is present. For this purpose, a conductor grid is punched out of the sheet strip at the first workstation. At the second workstation, the wire grid is loaded with chips. At the third workstation, a first injection molding step is performed, during which the chip is extruded and encapsulated. In a fourth workstation the wire grid is fitted with additional structural elements, and in a fifth workstation the additional structural elements are extruded and encapsulated in a second injection molding step. In the sixth workstation, the conductor grid is randomly punched out, so that after the random punching there is a manufactured module unit.

SUMMARY OF THE INVENTION A method for manufacturing a plug having the features of independent claim 1 and an injection mold having the features of independent claim 4 are configured to carry out the method for manufacturing a plug. , accordingly, the method and the injection mold have the advantage that the individual insert contact ends in the punching grid can be inserted as one part into the injection mold. This eliminates the need for cumbersome handling of individual small plug-in contact ends. Furthermore, the precise positioning of the plug-in contact end can be greatly simplified through a special centering mechanism within the punched grid. The plug-in contact end can be precisely maintained in position by punching out the grid in the closed injection mold and by the closing force and can seal the plastic melt accordingly. The optional punching of the plug-in contact end takes place through a punching device integrated into the injection mold after the actual filling process and before demolding the now completed plug from the injection mold. This eliminates the need for a separate punching station, reducing manufacturing costs.

Embodiments of the invention provide a method for manufacturing a plug, the plug comprising at least two bayonet contact ends and a housing, the at least two bayonet contact ends having a second bayonet contact end. 1 is at least partially disposed within the cavity of the housing. The method typically includes inserting and positioning a punching grid into a cavity of an injection mold, the punching grid having the at least two insert contact ends, the insert contact ends being connected to the punching die. inserting and positioning the at least two insert contact ends connected to each other via a piece, and extruding and encapsulating the at least two insert contact ends with a liquid plastic material, thereby creating a profile of the housing; aging said plastic material and demolding said plug such that at least two plug contact ends are at least partially disposed by respective first ends within said cavity of said housing; and ejecting. Before demolding, here, at least two insert contact ends of the punching grid are optionally punched out by means of a punching device integrated in the injection mold, the method being to cut the punched pieces.

Furthermore, an injection mold is provided, the injection mold being configured to carry out the method for manufacturing a plug according to the invention. The injection mold includes a hot runner system and a cavity. The manufactured plug has at least two bayonet contact ends and a housing, the at least two bayonet contact ends being at least partially inside the cavity of the housing by a first end. are located. wherein the injection mold comprises an integrated punching device, the integrated punching device being configured to optionally punch out at least two insertion contact ends of the punching grid; There is.

The focus of the invention is to combine an injection mold with a punching tool. The injection mold is geometrically configured in such a way that, despite the casting system, there is sufficient spatial position for the drive with the punching die and the die. In order to simplify the mounting of the injection mold, the inner area of the plug is designed as a movable pin, which can then be easily removed from the mold. Embodiments of the mold that have a viable method of independently controlling the injection molding process and the punching process can set the optimal punching time without relying on injection molding process control. This results in a very stable manufacturing process. An advantageous embodiment of the combination of an injection mold and a punching tool makes it possible to automate the insertion of the insertion contact end, increasing productivity.

A method for manufacturing a plug according to independent claim 1 and an advantageous improvement method of an injection mold according to independent claim 4 through the measures and expansion methods described in the dependent claims can be achieved.

It is particularly advantageous that a punching grid with at least two insert contact ends and one punching piece can be punched out in succession before being inserted into the cavity of the injection mold. Accordingly, punched grids can be obtained in a cost-effective manner with a large number of parts, in an advantageous manner as a supply part. Here, the punching piece to which the at least two plug-in contact ends are connected may be configured in the region of a second end of the at least two plug-in contact ends, the second end comprising: Inside the manufactured plug, it is placed outside the cavity of the manufactured housing. This makes it possible to simplify the operation and clamping of the punched grid in the extrusion and encapsulation process.

In an advantageous design method of the injection mold, the punching device can have a cutting die, a punching matrix, a drive and a positioning element, which are arranged in the injection mold. Can be easily integrated into molds.

In another advantageous design method of the injection mold, the drive device may be configured as a hydraulic drive device, the hydraulic drive device being adapted to move the cutting die in the direction of the punching substrate. It is configured. The hydraulic drive can thus for example comprise a drive cylinder, which can act directly on the cutting die.

In another advantageous design of the injection mold, the positioning member may be configured to center the punching grid and to clamp and/or support the punching grid during the extrusion and encapsulation process. The positioning member may include a movable bayonet pin, the movable bayonet pin being configured to slide onto a first end of the at least two bayonet contact ends. and the first end is disposed within the manufactured plug and within the manufactured housing cavity. That is, the external profile of the insertion pin can predetermine the shape of the cavity inside the plug housing.

In another advantageous design method of the injection mold, the positioning element can be provided with a positioning fork-shaped element such that the positioning fork-shaped element of the at least two insertion contact ends is The plug is configured to position and support a second end disposed outside the cavity of the manufactured housing within the manufactured plug.

Embodiments of the invention are illustrated in the accompanying drawings and explained in detail in the description below. In the accompanying drawings, the same drawing markings indicate components or parts that perform the same or similar functions.

1 is a schematic flowchart illustrating one embodiment of a method for manufacturing a plug according to the present invention; 2 is a schematic half-sectional view of an embodiment of an injection molding mold according to the invention, the injection molding mold being configured to carry out the method for manufacturing the plug of FIG. 1 according to the invention; FIG. . 3A and 3B are different schematic perspective views of the plug during implementation of the method for manufacturing the plug of FIG. 1 utilizing the injection mold of FIG. 2 according to the present invention; FIG. 3A and 3B are different schematic perspective views of the plug during implementation of the method for manufacturing the plug of FIG. 1 utilizing the injection mold of FIG. 2 according to the present invention; FIG. 3A and 3B are different schematic perspective views of the plug during implementation of the method for manufacturing the plug of FIG. 1 utilizing the injection mold of FIG. 2 according to the present invention; FIG. 3A and 3B are different schematic perspective views of the plug during implementation of the method for manufacturing the plug of FIG. 1 utilizing the injection mold of FIG. 2 according to the present invention; FIG. 3A and 3B are different schematic perspective views of the plug during implementation of the method for manufacturing the plug of FIG. 1 utilizing the injection mold of FIG. 2 according to the present invention; FIG. 3A and 3B are different schematic perspective views of the plug during implementation of the method for manufacturing the plug of FIG. 1 utilizing the injection mold of FIG. 2 according to the present invention; FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As can be seen in FIG. 1, the illustrated embodiment of a method 100 for manufacturing a plug 20 according to the present invention includes steps S100-S150.

As can be seen in FIG. 8, the fabricated plug 20 has at least two bayonet contact ends 24 and one housing 28, and the at least two bayonet contact ends 24 are connected to the first end 24. .1 is at least partially located inside the cavity 28.1 of the housing 28. In the example shown, the plug 20 comprises four insertion contact ends 24.

Further, as can be seen from FIG. 1, in step S100, the punching grid 22 is inserted into the cavity 5 of the injection mold 1 shown in FIG. 2, and in step S110, the punching grid is positioned. As can be seen in particular from FIG. 3, the punched grid 22 comprises at least two plug-in contact ends 24, which are connected to each other via punched pieces 26.

In step S120, a liquid plastic material is used to extrude and encapsulate the at least two plug-in contact ends 26, thereby creating a profile of the housing 28, such that the at least two plug-in contact ends 24 are each connected to a first such that it is at least partially located within the cavity 28.1 of the manufactured housing 28 by its end 24.1. In step S130, the plastic material is aged. In step S140, before the demolding step, at least two insertion contact ends 24 of the punching grid 22 are optionally punched out by the punching device 10 integrated in the injection mold 1, and the method is as follows: This is to cut the punched piece 26. In the final step S150, the plug 20 is released from the mold and taken out.

In the example shown, a punching grid 22 having at least two insert contact ends 24 and a punching piece 26 is punched out in succession before being inserted into the cavity 5 of the injection mold 1 . As can be seen from FIGS. 3 to 7, a punching piece 26 to which at least two plug-in contact ends 24 are connected is configured in the region of the second end 24.2 of the at least two plug-in contact ends 24. and the second end is located outside the cavity 28.1 of the manufactured housing 28 within the manufactured plug 20.

As can be seen from FIG. 2, the embodiment shown in the injection mold 1 according to the invention comprises a hot runner system 3 and a cavity 5, the injection mold having a plug 20 according to the invention according to FIG. The method is configured to carry out a method for manufacturing. Here, the hot runner system 3 is configured to fill the filling cavity 5 with liquid plastic material during the extrusion encapsulation process. Here, a punching device 10 is integrated into the injection mold 1, which punching device optionally punches out at least two insert contact ends 24 of the punching grid 22.

As can be seen from FIG. 2, the punching device 10 comprises, in the example shown, a punching die 12, a punching substrate 14, a drive device 16 and a positioning member 7, which positioning member comprises a punching grid. 22 to sandwich and/or support the punched grid during the extrusion encapsulation process. As can further be seen from FIG. 2, the drive 16 is configured in the example shown as a hydraulic drive 16A, the drive cylinder of which can act directly on the cutting die 12. Then, the cutting die is moved in the direction of the punching base material 14. The positioning member 7 includes a movable insertion pin 7A and a positioning fork-shaped member 7B.

As can further be seen from FIGS. 4 and 5, the movable bayonet pin 7A is slid onto the first end 24.1 of the at least two bayonet contact ends 24, the first end being , in the manufactured plug 20 to be placed within the cavity 28.1 of the manufactured housing 28. Here, the external profile of the insert pin 7A corresponds to the internal profile or profile of the cavity 28.1 of the housing 28. As can further be seen from FIGS. 4 and 5, the second ends of the at least two plug-in contact ends 24 are placed on the positioning fork-shaped member 7B, and the second ends are connected to the fabricated plug. 20 and outside the cavity 28.1 of the housing 28 being manufactured. The positioning fork-shaped element 7B therefore includes a corresponding space section, which is separated from one another with the contact pieces or "sharp teeth" of the positioning fork-shaped element 7B. The space portions each at least partially accommodate the second ends 24.2 of the plug-in contact ends 24. The combination of the movable insert pin 7A with the positioning fork-shaped member 7B thus centers the punching grid 22 and supports it during subsequent manufacturing. After positioning the punching grid 22, the injection mold 1 is closed and the extrusion encapsulation process is started, during which liquid plastic material is introduced into the closed cavity 5 through the hot runner system 3. , thereby creating a profile of the housing 28 in combination with the movable bayonet pin 7A, such that the at least two bayonet contact ends 24 are each made by a first end 24.1 of the housing 28. (as can be seen from FIGS. 6 to 8). As can further be seen from FIG. 7, before demolding, at least two insert contact ends 24 of the punching grid 22 are optionally punched out by a punching die 12 of a punching device 10 integrated in the injection mold 1. , the method is to cut the punched piece 26. The manufactured plug 20 shown in FIG. 8 can then be taken out from the injection mold 1.

Embodiments of the present invention combine the steps of extruding and enclosing the punched grid 22 using plastic and the punching step of optionally punching out at least two insert contact ends 24 of the punched grid 22 into one common mold. It is to be combined within.

Claims (6)

A method (100) for manufacturing a plug (20), comprising:
Said plug (20) comprises at least two bayonet contact ends (24) and one housing (28), said at least two bayonet contact ends (24) being connected to a first end (24). .1) is at least partially located inside the cavity (28.1) of said housing (28);
The method (100) includes:
inserting a punching grid (22) into the cavity (5) of the injection mold (1) and positioning it with a positioning member (7) , said punching grid (22) having at least two insert contact ends; (24), said insertion contact ends (24) being connected to each other through a punching piece (26);
A liquid plastic material is used to extrude and encapsulate said at least two plug-in contact ends (24), thereby creating the profile of said housing (28), said at least two plug-in contact ends (24) comprising: each by a first end (24.1) at least partially disposed within a cavity (28.1) of the fabricated housing (28);
aging the plastic material, demolding the plug (20) and removing it;
has
Before demolding, at least two insert contact ends (24) of the punching grid (22) are optionally punched out by a punching device (10) integrated in the injection mold (1), the punching method is cutting the punched piece (26);
The positioning member (7) is configured to align the center of the punched grid (22) and to sandwich and/or support the punched grid (22) during the extrusion and encapsulation process,
Said positioning member (7) comprises a movable bayonet pin (7A), said movable bayonet pin (7A) being connected to a first end (24.1) of at least two bayonet contact ends (24). ), said first end (24.1) being configured to slide over a cavity (28.1) of said manufactured housing (28) within a manufactured plug (20). ), the method (100). A punching grid (22) having at least two insert contact ends (24) and a punching piece (26) is punched out in succession before insertion into the cavity (5) of said injection mold (1). The method (100) of claim 1. A punching piece (26) to which at least two plug-in contact ends (24) are connected is arranged in the region of the second end (24.2) of said at least two plug-in contact ends (24). Claim 1, wherein the second end (24.2) is located outside the cavity (28.1) of the manufactured housing (28) within the manufactured plug (20). or the method described in 2 (100). An injection mold (1) for manufacturing a plug (20) , comprising :
Said plug (20) comprises at least two bayonet contact ends (24) and one housing (28), said at least two bayonet contact ends (24) being connected to a first end (24). .1) is at least partially located inside the cavity (28.1) of said housing (28);
The injection mold (1) comprises a hot runner system (3) and a cavity (5), and the plug (20) has at least two plug contact ends (24) and a housing. (28), said at least two plug-in contact ends (24) are at least internally located within the cavity (28.1) of said housing (28) by means of a first end (24.1). A partially arranged and integrated punching device (10) is provided, said integrated punching device (10) optionally cutting at least two insertion contact ends (24) of the punching grid (22). It is configured to punch out,
The punching device (10) includes a punching die (12), a punching base material (14), a drive device (16), and a positioning member (7),
The positioning member (7) is configured to align the center of the punched grid (22) and to sandwich and/or support the punched grid (22) during the extrusion and encapsulation process,
Said positioning member (7) comprises a movable bayonet pin (7A), said movable bayonet pin (7A) being connected to a first end (24.1) of at least two bayonet contact ends (24). ), said first end (24.1) being configured to slide over a cavity (28.1) of said manufactured housing (28) within a manufactured plug (20). ), the injection mold (1) is located within the mold . The drive device (16) is configured as a hydraulic drive device (16A), and the hydraulic drive device (16A) is configured to move the cutting die (12) in the direction of the punching substrate (14). An injection mold (1) according to claim 4 , comprising: an injection mold (1) according to claim 4; Said locating member (7) comprises a locating fork-shaped member (7B), said locating fork-shaped member (7B) said at least two insertion contact ends (24) in the fabricated plug (20). positioning and supporting a second end (24.2) located outside the cavity ( 28.1) of the manufactured housing (28); The injection mold (1) according to claim 4 or 5 , wherein the injection mold (1) is configured as follows.