DE102006049305A1 - Door or window handle, has core with front sided square cut receiver, where core, which is manufactured from plastics e.g. carbon fiber reinforced polyamide, includes two sides, which are connected with one another by curved area - Google Patents

Abstract

The handle has a core (30') with a front sided square cut receiver (40'). A casing (20') forms a grip area and surrounds the core area wise, where the core is manufactured from plastics e.g. carbon fiber reinforced polyamide. The core is manufactured in injection molding process, where the core has two sides, which are connected with one another by a curved area. The casing is manufactured from polyamide, polymethylmethacrylate, acrylonitrile butadiene styrene and polypropylene. An independent claim is also included for an injection molding procedure for manufacturing door or window handle.

Description

The The present invention relates to a door or window handle and a method for its production.

Door or window pusher are in great shape and color variety known. In addition to embodiments that are completely off Metal are made, pushers exist, at least partially Made of plastic. Simple embodiments are usually made of a plastic solid material made while the structure of higher quality embodiments of a stable Core with a recording for a square and a surrounding of the core coat of less stable material. While considering the coat of the respectively desired optical effect made of various materials can be made, consists of the core and the integrated square socket due to the actuation of the pusher given high mechanical load preferably made of steel. This two-part construction of the door or window handle leads to very robust and durable products.

Door or window pusher with the two-part construction described are made by first the core is cast or milled Then this core will be in a completely separate step is encased with an injection molding process.

The Use of a metal core in a door or window handle has in addition to the advantage of mechanical robustness, especially in the field of Square shot, but also disadvantages. This is the production the steel core consuming and expensive. There is also a change the shape of the steel core, which for the realization of new pusher forms necessary, very time consuming and cost-intensive, allowing the implementation of new creative ideas is difficult. After all must be followed by the production of the core subsequent spraying in the Usually be carried out at another manufacturing facility, so that a costly transport of the cores between different manufacturing facilities and a storage of cores in the field of injection molding is necessary.

Of the Invention is based on the object with a door or window handle two-piece construction and one for it to provide a suitable manufacturing method, which at substantially consistent stability of the pusher allows a reduction in manufacturing costs. In addition, a change in the outer shape of the pusher be relieved.

to solution this task is a door or window handle according to claim 1, which has a core with a frontal square socket has, wherein the made of plastic core at least partially surrounded by a jacket, which forms a handle area.

moreover is the solution the above object is an injection molding according to claim 12 is provided, which provides an injection mold with multiple part shapes. First In this process, cores are injected into the core partial molds. The sprayed Cores will follow implemented in shell-part shapes. Then pusher coats are under simultaneous overmolding the cores are sprayed in the mantle part molds, and then the finished pushers taken from the shell part shapes.

Of the door or door according to the invention window pusher is characterized by the fact that the conventional steel core by a Core is replaced by plastic. It can even suitable materials exceed the strength of the steel used so far. A trigger core from these new materials can therefore at least equal strength in Injection molding process significantly cheaper and faster be considered a conventional one Steel core. In addition, the manufacturing process for a complete pusher at Use of injection-moldable Sheath material significantly simplifies and speeds up both the core as well as the mantle in two directly consecutive Manufacturing steps injected at the same production site can be.

There made no claims to the core plastic material with respect to the optics can, must Here material can be used, which is less expensive than before used metal. Thus, with a pusher according to the invention also reduce the material costs. In extreme cases, it is even possible to get one inventive pusher cheaper to produce as the above-mentioned simple embodiments the complete plastic pushers, where the plastic material used must meet high optical standards and therefore relatively expensive.

Further facilitates the use of a molded plastic core due the comparatively good possibilities to change the shape (only the creation of a new mold is necessary) the cost-effective introduction new creative pusher forms.

In a preferred embodiment of the pusher, the core has two legs, which are connected to each other via a curved portion, wherein between the two legs an angle between 70 ° and 110 °, preferably 90 ° out is forming. A core of this shape can be used in a variety of classic pusher molds in which the first leg makes a distance from the door leaf or the window frame and the second leg is used as a lever for actuating the closing mechanism of the door or the window.

A Another preferred embodiment of the pusher uses a core that is in the area of its square socket opposite end has a further bend to pusher forms to support, in which the leg used as a lever at its end again a Bending has, so that the end of the pusher in the end again door leaf or towards the window frame. For reasons of mechanical strength It is recommended, even this pusher region stabilize by a core, otherwise it will be an unnecessary vulnerability of the pusher would form.

advantageously, The core is made of fiber reinforced Polyamide (PA) manufactured. This can be glass fibers and / or carbon fibers are used to increase the strength of the core to increase. With suitable combinations, the strength of steel can be exceeded become.

A another embodiment the pusher allows additional Cost savings through the use of fiber-reinforced plastic recycled material for the Core. This very cost effective Material supplies the needed Stability, but is significantly cheaper as a plastic material, which is usually used for the coat. That way you can even the manufacturing costs of the above-mentioned simple embodiments as per stand be fallen below the technology.

The Use of refractory plastic for the core is characteristic for one another embodiment of the pusher. In combination with a suitable refractory sheath material can be such a complete one fireproof pusher to be provided.

Of the Plastic core can be combined with various sheath materials become. In addition to polyamide (PA), polymethyl methacrylate (Plexiglas), acrylonitrile-butadiene-styrene (ABS) and polypropylene (PP) are also renewable raw materials like Wood or leather possible. This list is of course expandable.

Prefers be for the coat of the pusher Materials used as well as the core by injection molding can be processed to the advantages of the injection molding process according to the invention especially good for to be able to use an economical production of pushers according to the invention. Also Renewable resources such as wood or leather can be used here after suitable preprocessing be used.

A preferred embodiment the injection molding process according to the invention uses an injection mold consisting of alternately arranged Core and shell sub-forms is constructed, each core part shape exactly one shell part form is assigned. Thus, in one step several cores sprayed simultaneously, then simultaneously implemented, then again simultaneously overmoulded with the mantle and finally finished at the same time handle are removed, so that the production quantity per unit time can be increased.

The Injection mold of another preferred embodiment of the injection molding process is constructed so that the step of putting the sprayed Cores in the corresponding shell-part shapes by a rotation a part of the injection mold by a suitable angle, when used of two core and shell part shapes, preferably by 90 °, takes place.

Two further embodiments the injection molding process according to the invention differ by which way the spray material in the Core part form is introduced. The one embodiment used for insertion that end of the core part shape associated with the square socket is while the other embodiment is the one End of the core part form used, which assigned to the square recording Turned away. Preferably, in each case that method, with which is the higher core stability can generate.

in the The following are preferred embodiments the present invention explained with reference to drawings; in show this:

1 a partially sectioned three-dimensional view of a conventional door handle with steel core,

2 a three-dimensional view of a trigger core according to the invention with dashed lines indicated jacket, and

3 a schematic representation of a preferred embodiment of an injection mold according to the injection molding method according to the invention.

In the 1 The view shown shows the structure of a conventional door handle 10 who has a coat 20 and a steel core 30 includes. The steel core 30 has a four at its front end kant receptive 40 into which a square pin is inserted when mounting the handle on the door leaf 50 is pushed. The holding device 60 used in a known manner for releasably locking the pusher 10 with the square pin 50 ,

2 shows a sketch of a spinning core according to the invention 30 ' in a preferred embodiment. This pusher core is made entirely of plastic and is manufactured using the injection molding method according to the invention. It includes two legs 31 and 32 that over a curved area 33 connected to each other. The first leg 31 makes a distance to a door leaf or a window frame, while the second leg 32 associated with the lever for actuating a door or window closing mechanism.

The curved area 33 preferably has an angle of 90 °. In addition, the lever associated with the leg 32 at its the bend 33 remote end region another curvature 34 on, so that's the front side 35 opposite end 36 of the trigger core 30 ' extends back to a door leaf or window frame. Between the first leg 31 and a square shot 40 ' of the trigger core 30 ' extends a radial circumferential groove 37 for engaging a holding device with which the finished pusher is releasably attached to a door leaf or a window frame. The square shot 40 ' is a component of the one-piece pusher core 30 ' and is injected with the injection of the core. A production of the square recording 40 ' made of a suitable plastic material by injection molding is possible, although on the square socket 40 ' can affect large forces when you press the trigger. This is because plastic materials of high strength suitable for injection molding are now available.

The trigger core 30 has over its entire length a substantially circular cross section, so that the presser core 30 ' can be easily removed from its associated injection mold. The front side 35 opposite end 36 of the trigger core 30 ' It runs to a point, so that the diameter of the cross section continuously decreases in this area.

The dashed illustrated pusher coat 20 ' encloses the pusher core 30 ' at the in 2 almost completely shown embodiment; only the area of the square recording 40 ' is from the groove 37 spared.

The pusher coat 20 ' can be right after the injection of the trigger core 30 ' be sprayed.

A preferred embodiment of an injection mold 100 which is used in the injection molding method according to the invention is in 3 shown schematically. The injection mold 100 In this embodiment, each comprises two core part shapes 110 and two mantle part shapes each 120 , It should be noted that the number of respective sub-forms 110 . 120 can take on other values as well, but each core part form 110 exactly one shell part form 120 is to be assigned.

In the first process step, the plastic material used for the core is passed through the feeders 111 simultaneously into the two core partial forms 110 injected. Subsequently, in the second process step, the reaction of the injected cores from the two core sub-forms 110 in the two shell-part forms 120 using a transfer device, not shown, (for example, a transfer robot). In the third step, the pusher coats are now under simultaneous encapsulation of the previously converted cores in the man tel-part shapes 120 injected. This is done by supplying the jacket material through the feeders 121 , In order to optimize the production throughput of the device, during the third process step, the next cores in the core sub-forms can already be 110 be sprayed. In the fourth method step, the two finished pushers using a removal device, not shown (for example, a removal robot) from the shell-part forms 120 taken. In order to optimize the production throughput, in the fourth process step, in parallel with the removal of the finished pusher from the two shell partial molds 120 converting the next two sprayed cores from the core sub-shapes 110 in the respective shell-part forms 120 respectively.

in the another method can then simultaneously spraying two Cores and the spraying of two coats take place, whereupon in turn the removal of two finished pushers and the conversion of two cores can be done. These processes can be arbitrary be repeated often.

Of the door or door according to the invention window pusher and the injection molding method according to the invention were here for the sake of clarity only with reference to preferred embodiments described. However, alternative variants are equally feasible.

10

Door or window pusher

20

coat

20

coat

30

core

30 '

core

31

first leg

32

second leg

33

curved area

34

curved area

35

front

36

The End of the trigger core across from front

37

groove for holding device

40

Square drive

40 '

Square drive

50

Square spindle

100

injection mold

110

Core-part form

111

Feeder for core spray material

120

Coat-part form

121

Feeder for jacket spray material

Claims (16)

Door or window handle, with a frontal square socket ( 40 ' ) core ( 30 ' ) and a core surrounding the core at least partially, forming a grip region ( 20 ' ), characterized in that the core ( 30 ' ) is made of plastic. Door or window handle according to claim 1, characterized in that the core ( 30 ' ) is manufactured by injection molding. Door or window handle according to one of the preceding claims, characterized in that the core ( 30 ' ) two legs ( 31 . 32 ), which over a curved area ( 33 ), whereby between the two legs ( 31 . 32 ) An angle between 70 ° and 110 °, in particular an angle of approximately 90 ° is formed. Door or window handle according to one of the preceding claims, characterized in that the core ( 30 ' ) in the region of the square ( 40 ' ) opposite end ( 36 ) another curvature ( 34 ) having. Door or window handle according to one of the preceding claims, characterized in that the core ( 30 ' ) is made of fiber reinforced polyamide (PA). Door or window handle according to claim 5, characterized in that the core ( 30 ' ) is made of glass and / or carbon fiber reinforced polyamide (PA). Door or window handle according to one of the preceding claims, characterized in that the core ( 30 ' ) is made of fiber-reinforced plastic recycled material. Door or window handle according to one of the preceding claims, characterized in that the core ( 30 ' ) is made of refractory plastic. Door or window handle according to one of the preceding claims, characterized in that the jacket ( 20 ' ) made of polyamide (PA), polymethyl methacrylate (Plexiglas), acrylonitrile-butadiene-styrene (ABS), polypropylene (PP) and / or renewable raw materials. Door or window handle according to one of the preceding claims, characterized in that the jacket ( 20 ' ) is manufactured by injection molding. Door or window handle according to one of the preceding claims, characterized in that the jacket ( 20 ' ) the core ( 30 ' ) with the exception of the frontal square ( 40 ' ) completely encloses. Injection molding method for producing a door or window presser, comprising the steps of: providing an injection mold ( 100 ) with several partial forms ( 110 . 120 ); Spraying at least one core ( 30 ' ) in a core subform ( 110 ); Implementing the at least one core ( 30 ' ) in a shell part form ( 120 ); Spraying the handle coat ( 20 ' ) while simultaneously encapsulating the core ( 30 ' ) in the shell part form ( 120 ); and removing the finished pusher from the shell part mold ( 120 ). Injection molding method according to claim 12, comprising the following steps: providing an injection mold ( 100 ) of alternately arranged core and shell sub-forms, wherein each of the plurality of core sub-forms ( 110 ) exactly one shell part form ( 120 ) assigned; simultaneous spraying of cores ( 30 ' ) in all core subforms ( 110 ); simultaneous conversion of the injected cores ( 30 ' ) from the core subforms ( 110 ) into the corresponding shell partial forms ( 120 ); simultaneous spraying of pusher coats ( 20 ' ) while simultaneously coring the cores ( 30 ' ) in the shell part forms ( 120 ); and simultaneous removal of the finished pusher from the shell-part molds ( 120 ). Injection molding method according to one of claims 12 or 13, characterized in that the step of converting the injected cores ( 30 ' ) in the corresponding shell partial forms ( 120 ) is performed by a rotation of a part of the injection mold by a suitable angle. Injection molding method according to one of claims 12 to 14, characterized in that during injection of the core ( 30 ' ) Spray material of the square ( 40 ' ) associated end of the core part form ( 110 ) is introduced into this. Injection molding method according to one of claims 12 to 14, characterized in that during injection of the core ( 30 ' ) Spray material from the end of the core part mold ( 110 ) is introduced into this, which of the square ( 40 ' ) associated end of the core part form ( 110 ) is turned away.