EP1001874A1 - Procede et dispositif permettant de coller deux moities d'un dvd - Google Patents

Procede et dispositif permettant de coller deux moities d'un dvd

Info

Publication number
EP1001874A1
EP1001874A1 EP98943858A EP98943858A EP1001874A1 EP 1001874 A1 EP1001874 A1 EP 1001874A1 EP 98943858 A EP98943858 A EP 98943858A EP 98943858 A EP98943858 A EP 98943858A EP 1001874 A1 EP1001874 A1 EP 1001874A1
Authority
EP
European Patent Office
Prior art keywords
adhesive
dvd
sides
vacuum
centering pin
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.)
Withdrawn
Application number
EP98943858A
Other languages
German (de)
English (en)
Inventor
Martin Eichlseder
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.)
KraussMaffei Technologies GmbH
Original Assignee
Krauss Maffei Kunststofftechnik 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 Krauss Maffei Kunststofftechnik GmbH filed Critical Krauss Maffei Kunststofftechnik GmbH
Publication of EP1001874A1 publication Critical patent/EP1001874A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/52—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
    • B29C65/521—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive by spin coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1406—Ultraviolet [UV] radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1435—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. transmission welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1477—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of an absorber or impact modifier
    • B29C65/1483—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of an absorber or impact modifier coated on the article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • B29C65/7847—Holding or clamping means for handling purposes using vacuum to hold at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/45—Joining of substantially the whole surface of the articles
    • B29C66/452—Joining of substantially the whole surface of the articles the article having a disc form, e.g. making CDs or DVDs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8227—Transmission mechanisms using springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
    • B29C65/4845—Radiation curing adhesives, e.g. UV light curing adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2017/00—Carriers for sound or information
    • B29L2017/001—Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
    • B29L2017/003—Records or discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2017/00—Carriers for sound or information
    • B29L2017/001—Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
    • B29L2017/003—Records or discs
    • B29L2017/005—CD''s, DVD''s
    • 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
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1798—Surface bonding means and/or assemblymeans with work feeding or handling means with liquid adhesive or adhesive activator applying means

Definitions

  • the invention relates to a method for gluing essentially rotationally symmetrical plates, in particular based on polycarbonate, which have a central recess and devices for carrying out the method.
  • the preferred field of application of the present invention is the gluing of DVD half-pages.
  • two 0.6mm thick information carrier half sides have to be glued together.
  • the half sides are kept at a distance such that a gap is formed between them, the adhesive being introduced into the gap and the adhesive being distributed over the two half sides in such a way by suitable rotation of the two half sides that these are completely covered with adhesive.
  • the different versions of the DVD with a diameter of 120mm such as DVD 5, 10, 9 and DVD 18 in the possible types such as DVD-Audio, DVD-Video, DVD-Rom, DVD-R and DVD-Ram involve a number of difficulties when gluing.
  • Particularly noteworthy are radial and tangential bumps (radial tilt and tangential tilt) as well as overall a dirty bond, in particular a non-uniform adhesive layer or bubbles in the adhesive layer. Bubbles in the adhesive layer are particularly critical, since they result in the failure of the DVD, in particular in the case of DVD 9, since there are two information levels on the latter and the second information level is read out through the adhesive layer.
  • Another method is "UV capillary bonding" as described in a product brochure from Toolex Alpha.
  • the two sides of the DVD are kept at a distance with vacuum plates and bent at the same time (Fig. 4-5 in the brochure).
  • the glue is fed through a dispenser needle, which is inserted up to about half the radius of the DVD into the gap between the two sides of the DVD.
  • Adhesive is fed in at an average radial distance during one revolution.
  • the dispenser needle is then removed from the gap and the vacuum is released.
  • the "bent" DVD half-pages now return to their parallel position and the adhesive is distributed inwards and outwards by capillary forces.
  • a disadvantage of this method is that there is a risk of cracking of the sputtered metal layers (with which the laser light is reflected) due to the bending. There is also a deep insertion of the dispenser needle into the gap the risk of damage to the surfaces of the DVD half-sides. Finally, it should be noted that the rotating DVD presses the centrifugal force of the applied adhesive against the dispenser needle and causes a "glue jam" in front of the dispenser needle.
  • the closest state of the art is "UV spin coat bonding" as described in a Panasonic product description.
  • the DVD half sides are kept parallel to one another and spaced apart.
  • a dispenser needle is inserted from the outside into the gap and close to the center of the DVD.
  • An adhesive strand is applied near the center during a rotation.
  • the dispenser needle is guided out of the gap and the adhesive is spun off by rotation, as a result of which it is distributed over the two half sides.
  • the strand of adhesive touches both half sides, so that a relatively bubble-free adhesive layer is produced when spun off.
  • a disadvantage of this method is that the dispenser needle must be inserted close to the center.
  • the invention has for its object to provide a method with which two sides of the DVD can be glued securely and without bubbles and which is also suitable for other rotationally symmetrical plates, in particular based on polycarbonate, which have a central recess.
  • Another object of the present invention is to provide devices with which the method can be carried out. This object is achieved with respect to the method by the features of claim 1 or claim 2.
  • Advantageous refinements of the method can be found in subclaims 3 to 16.
  • the main advantage of the invention is that by supplying the adhesive via the central recess of the Adhesive can flow out from the feed element, for example a metering needle, without interference. This means, for example, that there is no jam of adhesive in front of the metering needle and further process steps can be initiated earlier.
  • the embodiment according to claim 5 has the advantage that the dispensing needle only has to penetrate a little into the gap between the two half sides of the DVD, so that the risk of damage to the surface can be largely ruled out.
  • a suitable wedge angle (claims 11 and 12) it is achieved that after the adhesive application by a slight increase in speed (depending on the back pressure of the gap) the adhesive is distributed evenly and symmetrically in this wedge.
  • the flow front speed is the same in all directions and bubbles cannot be trapped by leading adhesive.
  • suitable design of the exit Opening the dispenser needle can ensure simultaneous wetting of the DVD half sides when applying the adhesive.
  • Fig. 1 first embodiment of a bonding station according to the invention
  • Fig. 2 is a view in the direction of arrow A in Fig. 1;
  • Fig. 9 section at height AA 'through the centering pin in Fig. 8;
  • FIG. 12 detail from FIG. 11 in an enlarged representation
  • a base plate 33 carries a spindle 21 with a spindle drive 22 and a spindle housing 20 to which a holding bracket 19 is fastened orthogonally to the spindle axis.
  • a substantially cylindrical bearing housing 9 is attached to the outer edge region of this holding bracket 19, in the lower edge region of which a ball bearing 11 is inserted, which in turn carries a hollow cylindrical bearing block 10, on the underside of which the upper vacuum plate 17 is fastened, so that it is opposite the bearing housing 9 and the bracket 19 is rotatably mounted.
  • On the underside of the vacuum plate 17 there are an inner circumferential vacuum groove 52 and an outer circumferential vacuum groove 53, which are connected to a vacuum channel 55.
  • the lower vacuum plate 25 is preferably provided on its outer edge in the manner of a gearwheel with U-shaped recesses which serve as driving grooves and into which the driving pin 14 can snap when the vacuum plates 17, 25 move together.
  • Upper centering pin 5 extends from above through the retaining bracket 19, the bearing housing 9, the hollow cylindrical bearing block 10 and the central recess 60 in the upper vacuum plate into the space between the two DVD half sides 23 and 24. This centering pin 5 is by means of a clamping nut 6 attached to the bearing housing 9 and thus to the bracket.
  • a vacuum channel 50 runs inside the upper centering pin 5, which is guided radially outward at the level of the exit point 56 of the bearing block 10 and ends in a circumferential annular groove 57 corresponding to this exit point 56, with a vacuum-tight seal between the centering pin 5 and the Bearing block 10 sealing elements 65 and 66 are provided above and below the annular groove 57.
  • the centering pin 5 has an adhesive suction channel 51, which begins at the lower plate-like end of the centering pin 5 (see FIG. 2) and extends to the upper area thereof, where it is connected to a suction device (not shown).
  • a recess 61 in which an L-shaped metering needle 7 lies, preferably a steel needle, runs parallel to its axis in the surface of the centering pin 5, the foot of the L, ie the end piece 63 of the metering needle 7 lying parallel to the DVD half sides, lies in a U-shaped recess 62 at the lower end of the centering bolt 5 (cf. detailed view in FIG. 2).
  • the metering needle 7 is supplied with adhesive via a metering line 8.
  • the metering line 8 can be fixed at the desired height with the metering needle 7.
  • a compressed air actuated (54) attached to the centering pin 5 Rotating cylinder (rotary loader) 4
  • the metering needle 7 can be rotated about its axis, so that the kinked end piece 63 of the metering needle 7 can be pivoted in the space between the DVD half-sides 23, 24.
  • a vacuum pump to be connected to the connection point 64 of the vacuum channel 50 is not shown. Since the vacuum channel 50 is produced analogously to the vacuum channel 55, a plug 18 is also required here to seal the beginning of the bore.
  • a lower vacuum plate 25 with a central recess 35 and with an inner vacuum groove 52 and an outer vacuum groove 53, which are connected to a vacuum pump via vacuum channels (67, 50).
  • the vacuum plate 25 is fastened on the cylinder hat-shaped housing 26 of the lower centering pin 27, which in turn is seated on the drive shaft 31 of the plate drive 32 which is preferably attached to the base plate 33.
  • the lower centering pin 27 is resiliently mounted in the centering pin housing 26 via a spring ring 30 and a spring 28 and is stabilized in its axial direction by a guide pin 29. Below the outer edge of the lower vacuum plate 25 there is a channel 34 for collecting excess adhesive.
  • the procedure for gluing the DVD half pages 23 and 24 is as follows. First, the two DVD half sides 23 and 24 are inserted into the bonding station by a handling system, one (upper) DVD half side 23 being fed to the upper vacuum plate 17 and the other (lower) DVD half side 24 being fed to the lower vacuum plate 25.
  • the two DVD half-sides 23, 24 are centered by the centering pins 5 and 27 via the central recess and are held on the vacuum plates 17, 25 by a vacuum in the vacuum grooves 52 and 53 (FIG. 1).
  • the upper half of the DVD 23 can also be centered over the outside diameter, for which purpose the upper vacuum plate 17 has a recess for receiving the upper half of the DVD 23, which corresponds to the diameter of the DVD and has a depth corresponding to the thickness of the half of the DVD 23. Then the lower centering pin housing 26 with the lower vacuum plate 25 is set in rotation by the plate drive 32 via the drive shaft 31, the number of revolutions being set as required for the adhesive application (approx. 6000 ° / min to 36000 ° / min) . The upper vacuum plate 17 with the upper DVD half-side 23 is now moved down to the desired position (FIG.
  • the end piece 63 of the metering needle 7 is pivoted by 180 ° from the center of the DVD by means of the rotary cylinder 4 and is now in the position for introducing the adhesive (adhesive application position) between the DVD half-sides 23 and 24.
  • the application angle can be changed. Since the lower vacuum plate 25 is already rotating at the adhesive application speed, the upper vacuum plate 17 is also set in rotation by the driver bolt 14 with the same number of revolutions, so that it rotates synchronously with the lower vacuum plate 25.
  • the dosing needle 7 or its end piece 63 is in the adhesive application position, the dosing process is started and adhesive 36 is fed between the DVD half-sides 23 and 24.
  • the dosage of the adhesive 36 is carried out volumetrically. The exact amount required is applied during about one revolution.
  • the two DVD half sides 23 and 24 are wetted simultaneously when applying the adhesive 36.
  • the metering needle 7 or its end piece 63 is immediately pivoted back through 180 ° into the rest position (FIG. 4).
  • the speed on the disk drive is increased (to approximately 100,000 ° / min to 200,000 ° / min) and the adhesive 37 is thrown outwards.
  • the upper vacuum plate 17 is moved further down with the spindle drive 22 and both sides of the DVD are pressed together (FIG. 5).
  • the adhesive is spread over most of the DVD surface.
  • the capillary action is supported and the distribution of the adhesive 36 is accelerated by the simultaneous pressing and spinning.
  • the vacuum is switched off at the upper vacuum plate 17 and the upper plate is moved upwards by the spindle drive 22 (FIG. 6).
  • the upper half of the DVD 23 remains on the lower half of the DVD 24.
  • the lower centering pin 27 is pressed upwards by the spring 28 and now centers both DVD half sides 23, 24.
  • the vacuum on the upper vacuum plate 17 can be switched off when the DVD half sides are pressed together.
  • the spin speed is increased further (to approximately 500000 "/ min to 900 000 rpm).
  • the DVD is placed on the same vacuum plate 25 under the UV lamp 38 clocked, where the adhesive 36 hardens (Fig. 7).
  • the DVD is removed from a handling system and one Test device supplied, where it is checked for optical and dimensional errors by means of a laser scanner.
  • FIGS. 8 to 10 show an alternative embodiment of the upper centering pin 5 shown in FIGS. 1 and 2.
  • a web opposite the outlet opening of the end piece 63 of the metering needle 7 (in the rest position) 58 is provided, against the inside of which the end piece 63 is moved when it is turned back into the rest position, so that the opening of the end piece 63 is closed and no excess adhesive can get into the bonding station.
  • the adhesive collecting plate 39 and the adhesive suction channel 51 can be retained.
  • FIG. 11 and 12 show as a second embodiment an inventive bonding station with an axially displaceable metering needle.
  • the lower part with lower vacuum plate 25, centering pin housing 26, centering pin 27, spring 28, guide pin 29, spring ring 30, inner vacuum groove 52, outer vacuum groove 53 and the vacuum channels 67 and 50 is identical to the corresponding lower part from FIG. 1.
  • a driving pin 14 is resiliently mounted (15, 16) and can engage in driving grooves on the edge of the lower vacuum plate 25.
  • a bearing housing 9 is attached to the holding bracket 19, which is connected to the spindle 21 (not shown here) in the edge area of the holding bracket 19.
  • a ball bearing 11 is attached to its outer circumference and secured with an inner spring ring 13, which in turn carries a bearing block 10 (secured with an outer spring ring 12), in the lower edge of which the upper vacuum plate 17 is inserted and fastened , for example with a suitable adhesive.
  • the upper vacuum plate is made of glass and the holding bracket 19 and the bearing housing 9 are made with recesses 48 through which the glass vacuum plate 17 (and itself an annular part 49 is glued to the upper vacuum plate 17, in which a vacuum channel 68 runs, which in turn runs with the vacuum channel 55 in the upper vacuum plate 17 and secondly with the vacuum channel running through the bearing housing 9 and the retaining bracket 19 50.
  • Two glass plates, one of which is provided with a groove, can be glued together to obtain the vacuum channel 55 in the glass vacuum plate 17.
  • one of the two can face one another Surfaces run an annular groove 57 so that the vacuum is maintained during rotation
  • Uprightness of the vacuum 57 sealing elements 65 and 66 are provided above and below the annular groove.
  • the vacuum channel 50 is connected to a vacuum pump in a known manner.
  • An upper centering pin 40 extends from above through the bracket 19, the bearing housing 9, the ring member 39 and the central recess 60 in the upper vacuum plate 17 through into the space between the two DVD half sides 23 and 24.
  • a guide tube 41 is guided obliquely through corresponding openings in the bracket 19 and the bearing housing 9, immersed in the lower region of the centering pin 40 in this and is transferred within the centering pin 40 into a horizontal position, so that the end piece 59 of the guide tube 41 parallel to the DVD half pages 23, 24 runs.
  • the centering pin is included provided a detachable part, which corresponds to a longitudinal half and forms a solid cylinder with the other longitudinal half in this area, each longitudinal half having a groove, so that when the longitudinal halves are joined together, a curved bore is formed in which the guide tube 41 lies.
  • a bushing 43 is provided at the outlet opening in the centering pin 40 and fixes the end of the guide tube 41 in its position.
  • Inside the guide tube 41 there is an elastic plastic needle 42 as a metering needle 7.
  • the elastic metering needle 7 can be moved out of the guide tube 41 by a predeterminable distance into the space between the DVD half sides 23 and 24 apply the adhesive 36 (see detailed view in FIG. 12).
  • the method for gluing the DVD half-sides 23 and 24 corresponds essentially to that described above for FIG. 1 with reference to FIGS. 2-7.
  • the only difference from the above variant is that the dosing needle 7 is not swiveled into the glue application station and rotated back into the rest position, but is pushed out of the guide tube 41 into the glue application position and is fully retracted into the guide tube 41 after the glue application has ended (rest position) .
  • FIG. 13 and 14 schematically show further variants of the central bonding according to the invention.
  • the DVD half pages 23 and 24 are kept in a known manner by vacuum on two shaping plates at the desired distance.
  • the lower half of the DVD 24 is kept flat, while the upper half of the DVD 23 is aligned obliquely, so that an outwardly tapering gap 69 results.
  • An L-shaped metering needle 7 moves over the central recess of the DVD, is moved down into the wedge-shaped gap and moves outwards from the center between the DVD half-sides 23, 24. In this case, it is necessary that the bent part of the dispensing needle is smaller than the diameter of the recess .
  • the metering needle can - according to FIG.
  • the dispensing needle doses the required amount of adhesive in the form of an adhesive strand while simultaneously rotating the DVD into the wedge-shaped gap 69.
  • the dispensing needle can also rotate and the DVD stops.
  • the wedge-shaped formation of the gap causes simultaneous wetting of both sides of the DVD with adhesive.
  • the wedge angle As a function of the speed of the DVD, it is achieved that the adhesive cannot be thrown off despite turning the DVD, since the dynamic pressure is greater than the centrifugal adhesive force and a symmetrical bubble-free adhesive ring can thus form in the wedge. It is advantageous to let the wedge converge in the area of the adhesive application, as shown in Fig. 14, so that the DVD half-sides almost touch near the end of the dispensing needle, so that no or only slight capillary forces occur peel off the adhesive when applying.
  • the wedge shape also has the advantage that there is an excess of glue on the inside and only a small amount of residual air has to be pushed out in front of the glue flow front when ejecting through the narrower gap.
  • the optimal adhesive outer diameter can be set before spinning off.
  • the spinning process begins with the application of glue and can be carried out without interruption to the end, which reduces the cycle time of an adhesive process overall. This also helps that the metering needle can be returned to the rest position at an early stage.
  • the adhesive is evenly distributed from the inside to the outside (spinning off), with an excess of adhesive being thrown outwards beyond the edge area.
  • the gap can be brought into a wide variety of shapes in the various phases of the adhesive process (adhesive application, symmetrical adhesive distribution, spinning off), so that the gap can be adjusted to an optimum in accordance with the viscosity of the adhesive.
  • the dishing (flatness of the upper plate) is measured by means of laser optics and the spinning process is ended when an optimal straightness (flatness) is reached.
  • the finished DVD is then traded to the UV station and cured from one or both sides using UV light. Hardening from both sides is advantageous in that the aim is to heat the DVD as uniformly as possible. Then both sides are cooled symmetrically in the cooling station.
  • a laser scanner the finished DVD checks' s for errors before they are deposited onto a Guterspindel.
  • FIG. 15 shows various outlet openings of the metering needle 7 in cross section, namely oval (a), rounded with constrictions on the left and right (b) and angular with constrictions on the left and right (c). It is at the discretion of the person skilled in the art to propose other geometries. The most suitable form depends on various factors, such as the viscosity of the adhesive and the settings when applying the adhesive, and can be selected accordingly by a person skilled in the art.
  • the end of the dispensing needle can have different lengths over the circumference in the area of the adhesive outlet.
  • 16 shows an embodiment in which the lateral regions of the metering needle stand forward (a), while the top and bottom of the metering needle are cut backward (b).
  • the adhesive emerges there first and wets the half sides of the DVD at the same time.
  • a better adhesive application is achieved with the present invention.
  • the small amount of residual air between the half sides of the DVD is pushed in front by the comparatively symmetrical adhesive starting form, without the adhesive leading on one side and including air bubbles, because the symmetrical adhesive starting form results in a uniform flow front speed.
  • this has the advantage that, with precise dosing, only the required amount of adhesive has to be applied, which ultimately results in a shortening of the centrifuging time and finally of the cycle time.
  • the process runs without interrupting the plate speed.
  • the plate speed can be adjusted to the process according to the glue viscosity over 10 speeds.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Manufacturing Optical Record Carriers (AREA)

Abstract

L'invention concerne un procédé permettant de coller deux moitiés (23, 24) d'un DVD - digital versatile disc -. Ces deux moitiés sont maintenues à une certaine distance l'une de l'autre de manière à former un espace entre elles. La colle (36) est introduite dans cet espace puis répartie sur les deux moitiés. L'invention est caractérisée en ce que la colle est introduite par le trou central du DVD. Pour ce faire, il faut par exemple des aiguilles de dosage (63) en L introduites de manière pivotante dans un boulon de centrage (51) inséré dans le trou central, ou bien des aiguilles plastique flexibles introduites de manière coulissante dans un tube de guidage. L'introduction de la colle par le trou central permet à la colle de s'évacuer vers l'extérieur sans gêner l'aiguille de dosage quand les deux moitiés (23, 24) du DVD tournent. La colle ne s'accumule pas devant l'aiguille de dosage. Ce processus de collage peut être exécuté sans interruption de l'application jusqu'à la fin du séchage centrifuge.
EP98943858A 1997-08-06 1998-08-06 Procede et dispositif permettant de coller deux moities d'un dvd Withdrawn EP1001874A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19734056 1997-08-06
DE19734056 1997-08-06
US6242397P 1997-10-15 1997-10-15
US62423 1997-10-15
PCT/EP1998/004913 WO1999007542A1 (fr) 1997-08-06 1998-08-06 Procede et dispositif permettant de coller deux moities d'un dvd

Publications (1)

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EP1001874A1 true EP1001874A1 (fr) 2000-05-24

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EP98943858A Withdrawn EP1001874A1 (fr) 1997-08-06 1998-08-06 Procede et dispositif permettant de coller deux moities d'un dvd

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US (2) US6425968B1 (fr)
EP (1) EP1001874A1 (fr)
CA (1) CA2299255A1 (fr)
DE (1) DE19835660A1 (fr)
WO (1) WO1999007542A1 (fr)

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Publication number Priority date Publication date Assignee Title
EP1059344B1 (fr) * 1999-06-11 2005-04-27 Kitano Engineering Co., Ltd. Dispositif pour le durcissement d'un disque optique
JP2001134990A (ja) * 1999-11-02 2001-05-18 Sony Corp 光学記録ディスクの製造方法及び製造装置
US6611365B2 (en) * 2001-03-20 2003-08-26 Imation Corp. Thermoplastic substrates for holographic data storage media
DE10122668C1 (de) * 2001-05-10 2002-10-10 Steag Hamatech Ag Vorrichtung zum Verkleben von Substraten
DE10122667C1 (de) * 2001-05-10 2002-11-07 Steag Hamatech Ag Vorrichtung zum Verkleben von Substraten
WO2002093571A2 (fr) * 2001-05-14 2002-11-21 Aprilis, Inc. Procede et appareil destines a produire des supports d'enregistrement optiques presentant des surfaces exactement paralleles
US7455889B2 (en) * 2004-03-24 2008-11-25 Imation Corp. Holographic media fabrication techniques
US7314536B2 (en) * 2004-10-14 2008-01-01 Sony Corporation Disc pairing in optical disc replication
US20070090006A1 (en) * 2005-10-26 2007-04-26 Jeffery Kelsch Spindle sleeve
US20070281149A1 (en) * 2006-06-06 2007-12-06 Asml Netherlands B.V. Lithographic apparatus and device manufacturing method
DE102009022238A1 (de) 2009-05-20 2010-11-25 Kraussmaffei Technologies Gmbh Verfahren zur Herstellung von Kunststoff-Formteilen mit einer integrierten Leiterbahn

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JPS63124247A (ja) * 1986-11-13 1988-05-27 Matsushita Electric Ind Co Ltd 光デイスクの製造方法
EP0773372B1 (fr) * 1995-10-13 2004-12-15 Kitano Engineering Co., Ltd. Table de fixation tournante, avec pion, pour tenir et faire tourner un disque d'information
AU706524B2 (en) * 1996-03-28 1999-06-17 Matsushita Electric Industrial Co., Ltd. Method and apparatus for laminating boards
US6042684A (en) * 1996-04-01 2000-03-28 Toolex Alpha Ab Method and apparatus for glueing together disc elements
SE506451C2 (sv) * 1996-04-01 1997-12-15 Toolex Alpha Ab Förfarande och anordning för sammanlimning av substrat till dataskivor
SE506616C2 (sv) * 1996-05-13 1998-01-19 Toolex Alpha Ab Limningsmunstycke för sammanlimning av optiska skivelement
JP3613501B2 (ja) * 1997-08-01 2005-01-26 株式会社リコー 光情報記録媒体及びその製造方法
SE9900622L (sv) * 1999-02-22 2000-01-10 M2 Engineering Ab Förfaringssätt för sammanfogning av ett undre substrat med ett övre substrat medelst lim

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Also Published As

Publication number Publication date
US6425968B1 (en) 2002-07-30
WO1999007542A1 (fr) 1999-02-18
DE19835660A1 (de) 1999-03-04
CA2299255A1 (fr) 1999-02-18
US6634405B2 (en) 2003-10-21
US20010030012A1 (en) 2001-10-18

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