EP0230050A1 - Dispositif de revêtement d'une partie de la surface interne d'ampoules de lampe - Google Patents

Dispositif de revêtement d'une partie de la surface interne d'ampoules de lampe Download PDF

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Publication number
EP0230050A1
EP0230050A1 EP86118070A EP86118070A EP0230050A1 EP 0230050 A1 EP0230050 A1 EP 0230050A1 EP 86118070 A EP86118070 A EP 86118070A EP 86118070 A EP86118070 A EP 86118070A EP 0230050 A1 EP0230050 A1 EP 0230050A1
Authority
EP
European Patent Office
Prior art keywords
coating
bulb
evaporator coil
radiation
shader
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
EP86118070A
Other languages
German (de)
English (en)
Other versions
EP0230050B1 (fr
Inventor
Jacques Jean Maulavé
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
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0230050A1 publication Critical patent/EP0230050A1/fr
Application granted granted Critical
Publication of EP0230050B1 publication Critical patent/EP0230050B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/005—Methods for coating the surface of the envelope
    • 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
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel

Definitions

  • the partial coating of the inner surface of lamp bulbs with a radiation-reflecting material in particular the vapor deposition of visible radiation-reflecting layers onto the inner surface of reflector bulbs, is carried out in a vacuum.
  • a radiation-reflecting material in particular the vapor deposition of visible radiation-reflecting layers onto the inner surface of reflector bulbs.
  • the entire inner surface of the reflector bulb is first provided with the radiation-reflecting coating, usually aluminum.
  • the coating on the top of the piston is then triggered again by means of an etching liquid introduced into the reflector bulb.
  • the caustic liquid means that considerable safety regulations for production personnel and environmental protection must be observed.
  • Another method avoids the annoying wet triggering of the bulbous cap by adding sand, granules, glass beads or a similar substance to the area of the bulbous bulb in the hanging position for applying the reflective coating brought and removed after coating.
  • the piston crown remains uncoated, but the introduction and in particular the removal of the material covering the piston crown is not entirely problem-free.
  • the introduced filling material must always lie in a plane perpendicular to the longitudinal axis of the bulb in order to prevent an asymmetrical coating and thus an asymmetrical radiation of the finished lamp.
  • damage to the freshly applied reflective coating has often occurred during the removal of the filling material.
  • the invention has for its object to provide a structurally simple solution for the coating of reflector bulbs, in which the harmful exposure to chemicals and the cumbersome covering of the piston crown by a filling material can be eliminated. Furthermore, the coating should be able to be mechanized without loss of quality and in such a way that the corresponding device can be integrated into a production line with high piece output.
  • the piston crown is easily shaded by the reflective material to be evaporated, so that no coating can settle there.
  • the mobile shade made of ferromagnetic material is inserted in one operation by means of the mechanical gripper through the opening of the bulb neck into the interior of the lamp bulb and held there by a magnet on the bulb tip pointing downward.
  • the holding magnet is located outside the lamp bulb under the bulb top. This precisely positions and holds the shader.
  • the shape of the support surface of the shadow which is adapted to the piston crown, brings about a secure fit of the latter at its predetermined position in relation to the evaporator coil.
  • the outer diameter of the blade is matched to the inner diameter of the piston neck, so that insertion and removal can be carried out without problems using the gripper.
  • the circular cylindrical side wall makes it easier mechanical gripper for picking up, transporting and setting down the shade.
  • the upper edge of the shadow is also adapted to the shape of the piston to be coated, so that the applied coating ends exactly in the transition area between the reflector part and the piston crown.
  • the mechanical separation of the shader from the evaporator coil has the further advantage that the latter can be loaded mechanically with the radiation-reflecting material to be evaporated without difficulty and without this operation being hindered by the shader. Furthermore, the cleaning of the parts involved in the evaporation process and reusable is simplified. Since the shader is held in its precisely defined position without a holder arranged within the lamp bulb, a particularly uniform radiation-reflecting coating is formed on the reflector part.
  • the evaporator station of FIG. 1 consists of a chamber 1, on the underside of which a flange 2 is fastened by means of a weld seam 3.
  • the edge of the flange 2 is limited on the inside by a rubber sealing ring 4.
  • a lamp bulb 5 (80 mm in diameter) which has a bulb neck 6, an expanding reflector part 7 and a bulb cap 8.
  • the lamp bulb 5 lies with its outer reflector part 7 on the sealing ring 4.
  • the interior of the chamber 1 and thus also the interior of the lamp bulb 5 is evacuated during the application of the radiation-reflecting coating.
  • the quality of the vacuum is decisive for the quality of the coating.
  • a filter 9 is arranged between the lamp bulb 5 and the chamber 1 and has a retaining ring 10 on its underside.
  • the shade 11 is made of a ferromagnetic material.
  • the shade 11 arranged inside the lamp bulb 5 is replaced by one located outside the lamp bulb 5 Permanent magnet 12 immovably held in its precisely defined position.
  • an evaporator filament 14 loaded with an aluminum strip 13 has just moved into the lamp bulb 5.
  • the upper turn of the evaporator coil 14 lies at the level of the opening of the shadow 11.
  • the evaporator coil 14 is contained in holding tubes 15 made of pure aluminum, which in turn are clamped in the power supply lines 16 and 17.
  • the lower end of the holding tube 15 extends approximately to the level of the opening of the shade 11.
  • the power supply 16 is live during the coating process and is therefore surrounded by an insulator 18. Both power supply lines 16, 17 are connected in the upper area by means of a holder 19.
  • the neck shader 20 is also fastened to the holder 19 with the sleeve 21.
  • a shader 11 is shown in detail in FIG. A stainless steel with alloy additions of approx. 35% Cr and approx. 17% Mo is particularly suitable for this.
  • the contact surface 22 of the shadow 11 is dome-shaped, the radius ⁇ being adapted to the radius of the piston crown 8 (FIG. 1). Since the piston crown 8 generally has a small lens or thickening in the middle, the bearing surface 22 of the shadow 11 is provided with a small concentric recess 23. These two measures ensure that the shader 11 fits snugly against the inner surface of the piston crown 8.
  • the outer diameter D of the shade 11 is chosen so large that it can be inserted through the bulb neck 6 (FIG. 1) into the interior of the lamp bulb 5 and placed on the bulb top 8 without difficulty.
  • the on the bulb top 8 stepped shader 11 extends with its height H up to the upper, the largest diameter winding of the evaporator filament 14, which coincides with the plane of the largest diameter of the lamp bulb 5, at which the reflector part 7 merges into the bulb top 8.
  • the side wall 24 of the shade 11 is designed in the shape of a circular cylinder. This makes it possible for a mechanical gripper (FIG. 5) to be inserted into the inner cavity of the shadow 11 and to grip and transport it to the inner side wall 24 by clamping.
  • FIG. 3 An advantageous embodiment of the evaporator coil 14 is shown in FIG. 3.
  • the helix itself consists of three individual wires intertwined. This, as well as the conical manner of winding the coiled part of the evaporator coil 14, results in better wetting with the material to be evaporated.
  • the evaporator coil 14 has two and a half turns 25, the winding diameter decreasing downward. The envelopes of the individual turns thus form an angle ⁇ . This measure makes it easier to load the evaporator coil 14 with the aluminum strip 13 (FIG. 4).
  • the upper turn 26, which has the largest diameter, lies in the evaporator position approximately at the level of the upper edge of the shadow (FIG. 1).
  • the evaporator coil 14 is preferred over the two free-standing ends 27 as made of pure aluminum holding tube 15 (Fig. 1) drawn.
  • the aluminum strip 13 to be evaporated in FIG. 4 consists of 99.98% pure aluminum and weighs approximately 20 mg. Its two legs 28 are bent toward one another in a V-shape, the angle ⁇ enclosed by the legs 28 being identical to that due to the decreasing turns of the evaporator coil 14. Due to this mutually adapted shape, the aluminum strip 13 can be mechanically inserted into the evaporator coil 14. At the same time, this results in very good wetting between the evaporator coil 14 and the aluminum strip 13.
  • the lamp bulb 5 With its bulb tip 8 enters a correspondingly shaped receptacle (not shown), in the bottom of which the permanent magnet 12 is loosely let in.
  • the shadow 11 is then deposited on the inner surface of the piston crown 8 by the piston neck 6 by means of a mechanical gripper 29 - this is shown in FIG. 5.
  • the gripper 29 is provided with three fingers 30 which are offset by 120 ° in each case and spread out, which spread against the inner side wall 24 of the shadow 11 and thus clamp it.
  • the permanent magnet 12 now holds the shade 11 and thus at the same time the lamp bulb 5 located between the shade 11 and the permanent magnet 12.
  • the device for coating lamp bulbs 5 with a radiation-reflecting material 13 works in an alternating form and with an adjustment rate of approximately 4,150 pieces / h.
  • the output of good, mirrored lamp bulbs is mechanically fed into a modular machine for lamps via a buffer linked to the device.
  • the shaders 11 are cleaned after the usual period of use of approximately 100 coatings.
  • the evaporator coils 14 have a service life of approximately 40 to 60 reflections.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physical Vapour Deposition (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP86118070A 1986-01-15 1986-12-24 Dispositif de revêtement d'une partie de la surface interne d'ampoules de lampe Expired EP0230050B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3601010 1986-01-15
DE19863601010 DE3601010A1 (de) 1986-01-15 1986-01-15 Vorrichtung zum teilweisen beschichten der innenoberflaeche von lampenkolben

Publications (2)

Publication Number Publication Date
EP0230050A1 true EP0230050A1 (fr) 1987-07-29
EP0230050B1 EP0230050B1 (fr) 1989-06-14

Family

ID=6291896

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86118070A Expired EP0230050B1 (fr) 1986-01-15 1986-12-24 Dispositif de revêtement d'une partie de la surface interne d'ampoules de lampe

Country Status (2)

Country Link
EP (1) EP0230050B1 (fr)
DE (2) DE3601010A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108468031A (zh) * 2018-02-08 2018-08-31 广东祥新光电科技有限公司 散热光学灯杯的制作方法及使用该光学灯杯的led灯
US10717179B2 (en) 2014-07-28 2020-07-21 Black & Decker Inc. Sound damping for power tools
US11229995B2 (en) 2012-05-31 2022-01-25 Black Decker Inc. Fastening tool nail stop

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992003588A1 (fr) * 1990-08-24 1992-03-05 Dca Instruments Oy Dispositif de rechauffement de cellule d'effusion
DE10045544C2 (de) 2000-09-07 2002-09-12 Siemens Ag Verfahren zum Aufbringen einer Beschichtung auf eine Lampe
DE10045785C2 (de) * 2000-09-07 2002-10-24 Siemens Ag Verfahren zum Beschichten eines Bauteils

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD15372A (fr) *
US2657150A (en) * 1948-05-18 1953-10-27 Gen Electric Method and masking shield for interiorly coating hollow articles
GB997899A (en) * 1962-09-28 1965-07-14 Philips Electronic Associated Improvements in or relating to apparatus for coating part of the inner surface of a bulb with a metal layer by vapour-deposition
FR2360685A1 (fr) * 1975-11-27 1978-03-03 Lampes Electr Fab Reunies Dispositif de masquage pour une surface soumise a un depot par evaporation sous vide

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD15372A (fr) *
US2657150A (en) * 1948-05-18 1953-10-27 Gen Electric Method and masking shield for interiorly coating hollow articles
GB997899A (en) * 1962-09-28 1965-07-14 Philips Electronic Associated Improvements in or relating to apparatus for coating part of the inner surface of a bulb with a metal layer by vapour-deposition
FR2360685A1 (fr) * 1975-11-27 1978-03-03 Lampes Electr Fab Reunies Dispositif de masquage pour une surface soumise a un depot par evaporation sous vide

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11229995B2 (en) 2012-05-31 2022-01-25 Black Decker Inc. Fastening tool nail stop
US10717179B2 (en) 2014-07-28 2020-07-21 Black & Decker Inc. Sound damping for power tools
CN108468031A (zh) * 2018-02-08 2018-08-31 广东祥新光电科技有限公司 散热光学灯杯的制作方法及使用该光学灯杯的led灯
CN108468031B (zh) * 2018-02-08 2020-03-20 广东祥新光电科技有限公司 散热光学灯杯的制作方法及使用该光学灯杯的led灯

Also Published As

Publication number Publication date
DE3664020D1 (en) 1989-07-20
EP0230050B1 (fr) 1989-06-14
DE3601010A1 (de) 1987-07-16

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