EP2059943A1 - Culot de lampe - Google Patents

Culot de lampe

Info

Publication number
EP2059943A1
EP2059943A1 EP07788482A EP07788482A EP2059943A1 EP 2059943 A1 EP2059943 A1 EP 2059943A1 EP 07788482 A EP07788482 A EP 07788482A EP 07788482 A EP07788482 A EP 07788482A EP 2059943 A1 EP2059943 A1 EP 2059943A1
Authority
EP
European Patent Office
Prior art keywords
pin
lamp
reinforcing fibers
lamp base
axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP07788482A
Other languages
German (de)
English (en)
Other versions
EP2059943B1 (fr
Inventor
Thomas Schmidt-Lehmann
Matthias Protsch
Karin Dressel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osram GmbH
Original Assignee
Osram GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Osram GmbH filed Critical Osram GmbH
Publication of EP2059943A1 publication Critical patent/EP2059943A1/fr
Application granted granted Critical
Publication of EP2059943B1 publication Critical patent/EP2059943B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
    • H01J5/54—Means forming part of the tube or lamps for the purpose of providing electrical connection to it supported by a separate part, e.g. base
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/30—Manufacture of bases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material

Definitions

  • the invention relates to a lamp base for a lamp, in particular a vehicle lamp, and to a method for producing such a lamp base.
  • a vehicle lamp is disclosed, for example, in European Patent Application EP 0 786 791 A1.
  • This vehicle lamp has a lamp base made of plastic, wherein two diametrically arranged, radially outwardly directed pins are formed on the lamp base. These pins are used as part of a locking mechanism, in particular a bayonet closure, and therefore must withstand high mechanical loads. Canceling the pins, as may occur in conventional lamp sockets with insufficient pin strength, leads adversely to a failure of the lamp.
  • An inventive lamp base has a
  • Plastic base part with at least one molded pin on wherein the plastic material of the plastic base part is offset with reinforcing fibers and the orientation of the reinforcing fibers in the pin has a preferred direction.
  • Plastic base part on another molded pin Particularly preferably, the orientation of the reinforcing fibers in the further pin on a preferred direction.
  • the journal strength of the two pins can be increased with advantage.
  • the pin and optionally the further pin for mounting the lamp cap is provided in a socket.
  • the socket can be designed as a bayonet mount. The pin or pins are then part of a bayonet closure.
  • the plastic base part preferably extends between an upper side and a lower side. Furthermore, the plastic base part preferably has a side surface which extends between the upper side and the lower side of the plastic base part. This side surface is preferably formed in regions with respect to an axis of the plastic base part rotationally symmetrical, wherein the axis in particular through the top and through the Bottom of the plastic base part runs.
  • the upper side of the plastic base part may face a lamp body provided for generating radiation. Accordingly, the underside of the plastic base part of a socket, which is provided for the mounting of the lamp cap, facing.
  • the axis of the plastic base part generally runs along a main extension direction of the lamp.
  • the pin is preferably formed on the side surface of the plastic base part, wherein the pin extends in particular radially outward.
  • the pin can thus break through the rotational symmetry of the rotationally symmetrical region of the side surface.
  • the plastic base part with the pin is further preferably made in one piece.
  • the pins are formed on the plastic base part in such a way that the pins are directed radially outwards, in particular diametrically.
  • the preferred directions for the reinforcing fibers in the pins in this case are collinear.
  • the pin is preferably formed cylinder-like, wherein the cylinder axis of the pin is particularly preferably perpendicular to the axis of the plastic base part.
  • the pin has an end face.
  • the end surface may limit the spatial extent of the pin along a central axis of the pin.
  • the center axis corresponds to the cylinder axis of symmetry of the pin.
  • the preferred direction of the runs Orientation of the reinforcing fibers along the central axis of the pin.
  • the orientation of the reinforcing fibers in the pin has a preferred direction, in particular, when the angular distribution of the smallest angle between a predetermined, arbitrarily oriented in space, straight line and the respective main directions of extension of the individual reinforcing fibers deviates from a uniform distribution and has a maximum. Accordingly, the preferred direction runs along that straight line in which the maximum of the angular distribution lies at the smallest possible angle. In contrast, in the case of reinforcing fibers with an isotropic distribution of the main directions of extension of the reinforcing fibers, all angles with respect to such a straight line would occur with the same probability.
  • the orientation of the reinforcing fibers in the journal has a preferred axis, which particularly preferably runs in the preferred direction of the orientation of the reinforcing fibers in the journal.
  • the easy axis can pass through the end face of the pin.
  • the reinforcing fibers run parallel to the preferred axis or curved away from the preferred axis.
  • the reinforcing fibers curved away from the preferred axis may be hyperbolaous in the pin.
  • the course of the reinforcing fibers towards the end face of the pin can approach the preferred direction asymptotically.
  • the reinforcing fiber profile may be formed in the pin at least partially cylindrically symmetrical with respect to the preferred axis.
  • the reinforcing fibers are curved to the preferred axis.
  • a spatial orientation distribution of the reinforcing fibers in the journal may be formed at least in regions in a rotationally ellipsoidal manner with the preferred axis as rotational symmetry axis.
  • the additional pin according to the first or the second above-mentioned preferred embodiment variant is additionally formed.
  • the pin strength of both pins can be increased with advantage.
  • the pins can be made similar in terms of pin strength. Even the breaking of a pin can lead to the failure of the lamp during operation of a lamp with such a lamp base.
  • the journal strength of the pin with the lower pin strength crucial.
  • One Lamp base, in which both pins have a relatively high pin strength is therefore characterized by a particularly high mechanical strength.
  • pin strength can be considered in particular that force which must be used for canceling the pin of the plastic base part.
  • the lamp cap has an additional stiffening element for the pin or for the pin.
  • the stiffening element may be formed by means of a metal sheet.
  • the stiffening element for example the metal sheet, is preferably at least partially embedded in the plastic material of the plastic base part.
  • the additional stiffening element for the pin is designed as a tab, which is formed on an annular metal element.
  • This ring-like metal element can additionally serve as a metal element for an electrical connection of the lamp.
  • the plastic material of the plastic base part preferably consists of a thermally highly resilient plastic or contains at least one such plastic.
  • a plastic from the group of Polyetherimide (PEI), polyphenylene sulfide (PPS) and Liquid Crystal Polymer (LCP) can be used.
  • LCP is characterized in particular by a particularly favorable outgassing behavior. This means that in operation of a lamp with an LCP lamp base compared to other plastics comparatively little material outgassing and thus a deposition of the material on the lamp, in particular on an optically active element of the lamp, such as a radiation passage area or a lens to be further reduced can.
  • the reinforcing fibers are preferably designed as glass fibers.
  • the plastic material is mixed with glass fibers, the glass fiber content being between 20% and 70% inclusive, preferably between 30% and 50% inclusive.
  • other reinforcing fibers for example carbon fibers may be used.
  • the lamp base is designed as a lamp base for a high-pressure discharge lamp. Since such lamps with high voltage pulses, for example, with pulses of 30 kV, are ignited, a high voltage resistance of the socket is of particular importance. The required high voltage resistance is achieved in particular by a seal which is formed on a socket, which is provided for the mounting of such a lamp.
  • a lamp base with a plastic base part with reinforcing fibers whose orientation in the pin has a preferred direction is therefore particularly suitable for such high-pressure discharge lamps.
  • the lamp base is designed as a lamp base for a vehicle lamp, in particular for a headlight, such as a headlight, a vehicle.
  • a method according to the invention for producing a lamp cap which has a plastic base part with at least one molded pin comprises the following steps:
  • the formation of a preferred direction of the orientation of the reinforcing fibers in the pin is promoted.
  • the preferred direction of orientation of the reinforcing fibers in the post after step c) is along the flow direction in which the molding material passes through the for the Formation of the pin shaped part space of the casting space of the mold flows through.
  • the casting chamber has a further sub-space formed for the formation of the further journal, wherein in step b) the molding compound flows at least partially through this further sub-space.
  • the journal strength of the other pin can also be increased.
  • the journal strength of the two pins can thus assume approximately the same value.
  • an additional stiffening element for the pin is introduced into the casting space before step b), and the stiffening element is at least partially reshaped by the molding compound in step b). Due to the additional stiffening element, the pin strength can be further increased.
  • the lamp cap has an additional stiffening element for each pin.
  • the additional stiffening elements are integrally connected to each other. This simplifies the arrangement of the additional stiffening elements in the mold.
  • each pin may have a separate additional stiffener. In both cases, the pin strength of both pins can be increased with advantage.
  • a sprue part is formed in step b) on the journal.
  • a sprue part is understood in particular to mean a part which by means of the Form mass for the plastic base part is formed and protrudes beyond the trainees plastic base part.
  • the sprue is typically formed at the inlet of the mold.
  • the sprue part can be separated from the journal in step c) after curing of the molding compound.
  • a separation point By separating arises on the pin, in particular on an end face of the pin, a separation point.
  • a preferred axis of a spatial orientation of the reinforcing fibers in the pin preferably passes through this separation point.
  • a further sprue part can be formed on the further pin, which is likewise separated in step c) from the further pin.
  • the casting mold preferably has a further inlet through which the molding compound can flow into the casting space in step b).
  • step b) a portion of the molding compound can flow through both part spaces provided for the formation of the pins. The orientation of the reinforcing fibers in the two pins along a preferred direction is thereby promoted, which advantageously allows an increase in the pin strength.
  • an overflow part is formed in step b) by means of a portion of the molding material flowing through the part space of the casting space of the casting mold which is formed for the formation of the pin.
  • the casting space of the casting mold has a overflow part space formed for the formation of the overflow part.
  • the overflow part projects beyond the plastic base part to be produced and adjoins the cones.
  • the overflow part can be separated from the plastic base part to be produced. Due to this flow of the molding compound through the part space of the casting space formed for the formation of the pin, a direction of the reinforcing fibers having a preferred direction is promoted.
  • the pin strength can be increased with advantage.
  • a further overflow part can be formed by means of a portion of the molding compound flowing through the further partial space of the casting space of the casting mold which is formed for the formation of the further pin.
  • the casting mold has a further overflow part space for this purpose.
  • a gate part is formed on the pin and an overflow part is formed on the further pin.
  • the sprue part and the overflow part can be separated in step c).
  • a portion of the molding compound flows through the two partial spaces formed for the formation of the pins. An orientation of the reinforcing fibers in the pin in a preferred direction is thus promoted, whereby advantageously the pin strength of both pins can be increased.
  • the inflow of the molding compound in step b) takes place by means of casting, in particular by injection molding.
  • the plastic base part can be designed in particular as an injection molded part.
  • FIG. 1A an exemplary embodiment of a lamp with a lamp base according to the invention on the basis of a schematic perspective illustration and FIG. 1B a schematic top view of the lamp,
  • FIGS. 2A and 2B each show an exemplary embodiment for the orientation of the reinforcing fibers in a journal on the basis of a schematic sectional view through the journal;
  • Figure 3A is a schematic representation of a
  • FIG 3B is a schematic sectional view through a lamp socket according to the invention in the region of the pin with an additional stiffening element according to FIG 3A,
  • FIGS. 4A and 4B show schematic views of a further exemplary embodiment of a lamp base according to the invention with an additional stiffening element
  • FIGS. 5A to 5C show a first exemplary embodiment of a method according to the invention with the aid of schematically illustrated intermediate steps, Figures 6A to 6C, a second embodiment of a method according to the invention with reference to schematically illustrated intermediate steps, and
  • FIGS 7A to 7C a third embodiment of a method according to the invention with reference to schematically illustrated intermediate steps.
  • FIG. 1A schematically shows a perspective view of a lamp 1 with a lamp base 2 according to the invention.
  • a plan view of this lamp is shown in FIG.
  • the lamp base is exemplified in such a way that it meets the international standard IEC 60061-1 for a so-called P32d socket.
  • the lamp shown is a high-pressure discharge lamp, in particular a metal halide high-pressure discharge lamp with an electrical power consumption of approximately 35 W, which is intended for use in a motor vehicle headlight.
  • a discharge vessel In a translucent, cylindrical protective piston 10, a discharge vessel, not shown in the figure is arranged. In the interior of the discharge vessel, two gas discharge electrodes and a xenon and metal halides comprising ionizable filling for generating a gas discharge are provided. Details of the discharge vessel, the protective piston 10 and its fixation in the lamp base are described in greater detail in, for example, the above-mentioned European published patent application EP 0 786 791 A1.
  • the lamp base 2 has a plastic base part 20, on which a pin 21 and a further pin 22 are formed.
  • the plastic base part 20 with the pins 21 and 22 is made in one piece.
  • the plastic base part extends between an upper side 201 and a lower side 202.
  • a side surface 203 extends between the upper side and the lower side and is partially cylindrically symmetrical with respect to an axis of the plastic base part 20, the axis piercing the upper side and the lower side. Furthermore, the axis runs along the main extension direction of the lamp 1.
  • the lamp cap 2 has a ring-like metal element 3.
  • This ring-like metal element is used for electrical contacting of the lamp 1.
  • the annular metal element is electrically conductively connected to a current return element 11.
  • the pins 21 and 22 are directed radially outwardly and in particular arranged diametrically opposite each other.
  • the pins are used for fastening the lamp cap 2 in a socket, in particular a bayonet mount.
  • the orientation of the reinforcing fibers in the pins 21 and 22 each have a preferred direction.
  • Figure 2A shows schematically a section through the pin 21 and 22, wherein a central axis 217 of the pin 21 and a central axis 227 of the further pin 22 lie in the cutting plane.
  • the pins 21 and 22 are designed cylindrically symmetrical with respect to the central axis 217 and 227, respectively.
  • the center axes of the pins each extend perpendicular to the axis of the plastic base part.
  • the spatial extent of the pins 21 and 22 in the direction of the central axis is limited by an end face 215 and 225, respectively.
  • the orientation of the reinforcing fibers 4 of the pin 21 has a preferred axis which is congruent with the central axis 217 of the pin.
  • the preferred axis extends in the preferred direction of the orientation of the reinforcing fibers.
  • a congruent course of the preferred axis with the central axis 217 is preferred, since in this case the orientation of the reinforcing fibers in the pin 21 can be particularly well rotationally symmetrical with respect to the preferred axis. Deviating from this, however, the preferred axis can also run parallel or obliquely to the central axis 217.
  • the reinforcing fibers 4 in the pin 21 are curved to the preferred axis.
  • the spatial orientation distribution of the reinforcing fibers 4 in the pin 21 is formed like a rotational ellipsoid.
  • the figure shows a section through five ellipsoids of revolution, along the surface of which the reinforcing fibers preferably extend, in order to illustrate the course of the fibers.
  • the rotational symmetry axes of these ellipsoids of revolution extend collinearly along the preferred axis formed by the central axis 217.
  • the shape of the ellipsoid of revolution is at least partially different from a spherical shape, so that the spatial orientation distribution of the reinforcing fibers in the pin 21 has a preferred direction along the central axis 217.
  • the frequency with which, in the section shown by the pin, angles between the central axis and the respective main extension direction of the individual reinforcing fibers occur increases at small angles. Based on a section through the pin can thus be determined the preferred direction of the spatial orientation distribution.
  • FIG. 2B An alternative orientation of the reinforcing fibers with a preferred direction is shown in FIG. 2B.
  • the reinforcing fibers 4 are parallel to the preferred axis or curved away from the preferred axis.
  • the reinforcing fibers 4 bent away from the preferred axis are hyperbolaous in the pin 21, the course of the reinforcing fibers approaching the end face 215 of the pin asymptotically approaching the preferential direction.
  • the preferred course of the reinforcing fibers is again rotationally symmetrical to the preferred axis and thus to the central axis 217.
  • FIGS. 2A and 2B The course sketched in each case in FIGS. 2A and 2B is merely intended to illustrate how the reinforcing fibers 4 in the pin 21 are preferably aligned. This does not mean that all reinforcing fibers are formed in the pins according to this basic pattern of the fiber flow. Likewise, the symmetry data refer to this basic pattern. The actual course of the individual reinforcing fibers is generally not exactly rotationally symmetrical.
  • the orientation of the reinforcing fibers in the pins shown in FIGS. 2A and 2B respectively has a preferred direction, the preferred direction extending in particular along the central axis of the respective pin. In both cases, this can advantageously increase the pin strength.
  • the course of the fibers in the further pin 22 can also be designed as described in connection with FIGS. 2A or 2B.
  • the preferred axis of the orientation of the reinforcing fibers 4 along the central axis 227 of the further pin 22 runs.
  • the pins 21 and 22 each have one of the orientation distributions shown.
  • the pin strength of both pins can be increased at the same time with advantage.
  • FIG. 3B shows an exemplary embodiment of a lamp base, in which the lamp base has an additional stiffening element 31 for the pin 21.
  • FIG. 3B schematically shows a section through the pin 21.
  • the stiffening element 31 is designed as a tab, which is formed on the ring-like metal element 3. Furthermore, the stiffening element is embedded in the plastic material of the lamp cap 20.
  • the ring-like metal element is shown schematically in Figure 3A in perspective view.
  • the ring-like metal element 3 has two tabs 31 and 32, which are arranged diametrically and extend radially outward.
  • the tab 31 is for additional stiffening of the pin 21 and the tab 32 for additional stiffening of the pin 22 is provided.
  • a further in the radial direction angled welding lug 33 is formed.
  • the welding lug has a recess 34, which serves for making electrical contact with the current supply wire of the current return 11.
  • the additional stiffening element 31 may also be formed separately from the ring-like metal element.
  • the stiffening element can be designed in each case as a metal sheet.
  • the stiffening element is formed substantially annular and has a first leg 311 and a second leg 312.
  • the stiffening element 31 is substantially U-shaped and covers most of an outer surface of the pin 21.
  • Embodiments consist of the plastic base part 20 and the pins 21 and 22 formed thereon preferably from a thermally highly resilient plastic or contain at least one such plastic. Furthermore, the plastic is preferably mechanically highly resilient.
  • a plastic from the group of polyetherimide (PEI), polyphenylene sulfide (PPS) and liquid Crystal polymer (LCP) can be used.
  • PEI polyetherimide
  • PPS polyphenylene sulfide
  • LCP liquid Crystal polymer
  • a polyetherimide also known under the trade name ULTEM®, typically has a glass fiber content of 30%.
  • cones can be formed which already have a strength of more than 500 N without an additional stiffening element. The elongation at break of this material is 2%.
  • LCP Liquid Chrystal Polymer
  • VECTRA® or ZENITE® the proportion of glass fibers in the material is between 30% and 50% inclusive.
  • LCP is characterized by a particularly high age stability, especially with regard to the outgassing behavior. Compared to other thermally highly resilient plastics LCP thus enables the production of a lamp in which a fogging of optical components, such as the protective piston 10, due to outgassing of the plastic base part 20 is further reduced.
  • LCP is a highly anisotropic, highly crystalline material that can form crystalline regions already in the liquid phase, so that an improvement of the cone strength can be achieved by a suitable orientation of the crystals during the production of the plastic base part, for example by means of casting or injection molding.
  • the reinforcing fibers may alternatively or in addition to glass fibers, for example, be designed as carbon fibers.
  • FIGS. 5A to 5C show a first exemplary embodiment of a method according to the invention for producing a lamp cap 2 on the basis of a schematic representation of intermediate steps.
  • a lamp base each with two pins 21 and 22 shown.
  • Shown schematically in FIG. 5A is a section through a casting mold 5, which is provided for the production of the lamp cap 2 and has a casting space 50.
  • the cut runs diametrically through the casting space 50, so that the partial chambers 51 and 52 provided for forming the radially outwardly directed, and in particular diametrically arranged, pins 21 and 22 can be seen in the section.
  • a provided in a finished lamp cap 2 part which is provided for example for electrical contacting of the lamp 1 or as an additional stiffening element, can be arranged in the casting chamber 50 before the flow of the molding material. This is not explicitly shown in FIGS. 5A to 7C for the sake of clarity.
  • the molding compound can thus flow around this part at least partially.
  • an additional stiffening element 31 for the pin 21 and / or for the pin 22, such as a stiffening element, which is designed as described in connection with Figures 3A to 4B, are arranged.
  • the casting space has an overflow part space 58 and a sprue part space 53.
  • the sprue part adjoins an inlet 55 of the casting mold 5.
  • the casting space is filled via the inlet with a molding compound. This inflow can be done for example by means of casting, such as injection molding.
  • the molding material which is used to form the
  • Plastic base part is provided is in pourable State through the inlet 55 in the casting chamber 50 of the mold 5 embedded.
  • the casting material flows through the formed for the formation of the pin 21 subspace 51 therethrough.
  • part of the molding compound flows through the part space 52 formed for the formation of the further pin 22, so that an overflow part space 58 is filled with the molding compound.
  • cavities 51 and 52 thus flows at least a portion of the molding composition therethrough. Due to the passage of the molding compound through the two pins 21 and 22, a preferential direction having orientation of the reinforcing fibers is promoted. The preferred direction runs along the direction in which the molding compound flows through the respective subspaces 51 and 52.
  • the plastic base part 20 shown schematically in FIG. 5B with the sprue part 211 and the overflow part 224 can be removed from the casting mold 5.
  • the sprue part 211 and the spill part 224 extend radially outward from the respective spigot 21 and 22, respectively.
  • the sprue part 211 and the overflow part 224 are separated from the pins 21 and 22, respectively.
  • the separation is preferably carried out mechanically, for example by means of breaking, cutting or sawing.
  • the finished lamp base 2 with the plastic base part 20 is shown in Figure 5C.
  • the spatial orientation distribution of the reinforcing fibers in the pin 21 may be as described in connection with FIG. 2A.
  • Such an orientation distribution of the reinforcing fibers is typical for a journal in which the partial space 51 of the casting space 50 of the casting mold 5 intended for the formation of the journal adjoins the sprue part space 53.
  • the orientation distribution of the reinforcing fibers in the further pin 22 may be formed according to the orientation distribution described in connection with FIG. 2B. Such an orientation distribution is typically achieved in that a part of the molding compound flows through the casting space 52 provided for the formation of the journal 22 adjoining the overflow part as the molding compound flows in, with the overflow part space 58 being filled up. In this case, compared to a pin, in which in the production of the formed for the formation of the pin part space is not adjacent to an overflow part space, the formation of an orientation of the reinforcing fibers is promoted with a preferred direction. The pin strength can thus be increased advantageously.
  • the pin strength could be increased further from about 380 N to an average value of more than 500 N.
  • An additional stiffening element thus advantageously allows a further increase in the mechanical strength of the pins.
  • the indicated measured values refer in each case to lamp bases 2, in which the plastic base part 20 is formed by means of LCP material with glass fibers as reinforcing fibers.
  • the pins 21 and 22 each have a separation point 210 and 220, respectively. These separating points occur during the separation of the overflow part 224 or the sprue part 211.
  • the preferred axes of orientation of the reinforcing fibers in the pins 21 and 22 extend through these separating points 210 and 220, respectively.
  • the casting mold 5 differs from the casting mold 5 shown in FIG. 5A in that the casting mold has a further inlet 56 in addition to the inlet 55.
  • a sprue part space 53 is formed at the inlet 55 and a sprue part space 54 is formed at the further inlet 56.
  • These two Angussteilsammlung 53 and 54 each adjoin a formed for the formation of the first pin part space 51 and formed for the formation of the further pin further subspace 52.
  • the molding compound can thus flow through the inlet 55 and the further inlet 56 into the casting space 50 of the casting mold 5.
  • FIG. 6B in turn, the plastic base part 20 with the pin 21 and the further pin 22 and an overflow part 211 adjoining the pin and an overflow part 222 adjoining the further pin 22 are shown.
  • FIG. 6C again shows the finished lamp base 2 with the plastic base part 20 after the separation of the sprue part 211 and the further sprue part 222.
  • a separation point 210 is again formed on the journal 21 and a separation point 220 on the further journal 22.
  • the reinforcing fibers in the pin 21 and the other pin 22 each have a spatial
  • Orientation distribution with a preferred direction which may be formed as described in connection with Figure 2A.
  • the orientation of the reinforcing fibers thus has a preferred direction, whereby the tenon strengths of the two cones can advantageously be matched to one another.
  • the casting mold 5 shown in FIG. 7A differs from the casting mold according to FIG. 5A in that it is formed on those for the formation of the first peg 21 Subspace 51 an overflow part space 57 adjacent.
  • the molding material flows into the casting space 50 through the inlet 55, a portion of the molding compound flows through the part space 51 formed for the formation of the pin 21 and the part space 52 formed for the formation of the further pin 22, so that the overflow part spaces adjoining these part spaces 57 and 58 are filled with the molding material.
  • FIG. 7B again shows the plastic base part 20 with an overflow part 213 and a further overflow part 224, wherein the overflow part 213 adjoins the journal 21 and the overflow part 224 adjoins the journal 22. Furthermore, a sprue part 231 is formed on the plastic base part 20.
  • FIG. 7C shows the finished lamp base 2 with a plastic base part 20, in which the overflow part 213 and the further overflow part 224 as well as the sprue part 231 are removed are. Accordingly, the plastic base body has three separation points 210, 220 and 230.
  • the spatial orientation distribution of the reinforcing fibers in the journal 21 and the further journal 22 has a preferred direction and can in particular be designed in accordance with the spatial orientation distribution described in connection with FIG. 2B.
  • the finished lamp base thus has two pins in which the spatial orientation of the reinforcing fibers in each case has a preferred direction.
  • the courses of the reinforcing fibers in the pins 21 and 22 thus have the same basic pattern.
  • the pins 21 and 22 can thus have an approximately equal pin strength.
  • the invention is also suitable for the production of lamp sockets with one of two different number of pins, such as with a pin or with three pins.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

L'invention concerne un culot de lampe (2), notamment un culot de lampe de véhicule à moteur, le culot de lampe présentant une partie (20) en matière plastique avec au moins un ergot (21) façonné, la matière plastique de la partie en plastique du culot étant mélangée à des fibres de renforcement (4) dont l'orientation dans l'ergot présente une direction préférentielle. La capacité de charge mécanique des ergots peut ainsi être augmentée avantageusement.
EP07788482A 2006-09-08 2007-08-17 Culot de lampe Expired - Fee Related EP2059943B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006042178A DE102006042178A1 (de) 2006-09-08 2006-09-08 Lampensockel
PCT/EP2007/058581 WO2008028795A1 (fr) 2006-09-08 2007-08-17 Culot de lampe

Publications (2)

Publication Number Publication Date
EP2059943A1 true EP2059943A1 (fr) 2009-05-20
EP2059943B1 EP2059943B1 (fr) 2011-07-06

Family

ID=38846757

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07788482A Expired - Fee Related EP2059943B1 (fr) 2006-09-08 2007-08-17 Culot de lampe

Country Status (7)

Country Link
US (1) US8162528B2 (fr)
EP (1) EP2059943B1 (fr)
JP (1) JP5300724B2 (fr)
CN (1) CN101512713B (fr)
DE (1) DE102006042178A1 (fr)
TW (1) TW200818632A (fr)
WO (1) WO2008028795A1 (fr)

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CN101512713A (zh) 2009-08-19
TW200818632A (en) 2008-04-16
CN101512713B (zh) 2012-05-02
EP2059943B1 (fr) 2011-07-06
US8162528B2 (en) 2012-04-24
JP5300724B2 (ja) 2013-09-25
JP2010503165A (ja) 2010-01-28
WO2008028795A1 (fr) 2008-03-13
US20100176709A1 (en) 2010-07-15
DE102006042178A1 (de) 2008-03-27

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