EP0595917B2 - Process for making a pencil - Google Patents
Process for making a pencil Download PDFInfo
- Publication number
- EP0595917B2 EP0595917B2 EP92915797A EP92915797A EP0595917B2 EP 0595917 B2 EP0595917 B2 EP 0595917B2 EP 92915797 A EP92915797 A EP 92915797A EP 92915797 A EP92915797 A EP 92915797A EP 0595917 B2 EP0595917 B2 EP 0595917B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- melt adhesive
- lead
- mine
- hot melt
- mines
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 24
- 239000000853 adhesive Substances 0.000 claims description 13
- 230000001070 adhesive effect Effects 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 230000005855 radiation Effects 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims 5
- 239000004831 Hot glue Substances 0.000 description 33
- 239000003292 glue Substances 0.000 description 15
- 239000010410 layer Substances 0.000 description 10
- 238000004026 adhesive bonding Methods 0.000 description 9
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 239000000975 dye Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000003995 emulsifying agent Substances 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 239000004922 lacquer Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 229920002689 polyvinyl acetate Polymers 0.000 description 2
- 239000011118 polyvinyl acetate Substances 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K19/00—Non-propelling pencils; Styles; Crayons; Chalks
- B43K19/16—Making non-propelling pencils
Definitions
- the invention relates to a method for producing a Pin, a in a groove of a first housing part Mine inserted and on the first housing part with the mine then a second formed with a groove Housing part attached and the lead with the housing parts and the two housing parts are glued together.
- the so-called bonding process is used to manufacture a pen known, in which an adhesive several times ring-shaped or in a network structure on the mine is applied.
- the bonding process is used for Fixing the lead in the groove of a first housing part or to fix the lead between the two with corresponding grooves trained housing parts.
- the disadvantage is that it is difficult to use an adhesive in the manner mentioned, i.e. with the bonding process to build a mine.
- a method of making pencils in which a water-soluble glue for gluing the mines between Shaft halves used is from GB 471 340 known.
- a similar process is shown in FR 781 976.
- a pencil making machine where one Glue device is provided is from the "Journal of Microwave Power ", 10 (1), 1975, pages 19 to 26.
- a microwave heating device is used there.
- a device for gluing boards at the Pen production is known from DE 22 65 723.
- DE-AS 1 230 329 describes a method for solid Connection of a pencil lead with a pencil cover known.
- a microporous glue coating i.e. a highly diluted plastic glue
- the Dilution ratio is 1:10, for example.
- DE-GM 7 038 350 distinguishes between a so-called “White glue”, i.e. a polyvinyl acetate dispersion for the Gluing the halves of the wooden jacket of a pencil and a hot melt adhesive to glue the lead in half of the wooden jacket. So here come two from each other various adhesive materials for use.
- White glue i.e. a polyvinyl acetate dispersion for the Gluing the halves of the wooden jacket of a pencil and a hot melt adhesive to glue the lead in half of the wooden jacket. So here come two from each other various adhesive materials for use.
- the invention has for its object a method of to create the type mentioned above, with which the above mentioned problems are eliminated, i.e. with which in particular. Tolerances of the leads or tolerances of the grooves in the housing parts are easily compensated so that the said pens with high productivity at low Manufacturing committee can be produced.
- the flexible, flexible hot melt adhesive layer Manufacturing tolerances of the mines, such as through Drying shrinkage or by stretching or compression are effected and also dimensional tolerances of the for receiving the mine-serving grooves in the housing parts be balanced so that the attachment of the mines between the housing parts without any problems, i.e. with little Manufacturing committee is possible.
- the flexible Hot melt glue can be used between the leads Housing parts are pinched without it Damage to the mines is coming.
- the flexible hot melt adhesive guarantees that every mine fits snugly in the groove of the corresponding housing part. Even grooves with one Non-circular cross-sectional profile can be created using the flexible Hot melt adhesive can be compensated.
- the mine is in a bath of hot melt adhesive introduced in which the mine with a layer of the Hot melt adhesive is covered.
- the one with the hot melt adhesive covered mine is then passed through a calibration nozzle moved through.
- excess hot melt adhesive removed from the mine, so that the outer dimensions of the with the Hot melt adhesive covered mines in precisely defined conditions surrender. This is for mass production with yours Tolerance influences of importance.
- the process steps of placing the mine in the bath of hot melt glue and moving it with that Hot melt adhesive covered mine through the calibration nozzle be separated from each other.
- High productivity will however, when the mine reached through the bath of the Hot melt adhesive and immediately afterwards through the Calibration nozzle is moved.
- the Wall of the hot melt adhesive bath container with formed at least one corresponding calibration nozzle be.
- the hot melt adhesive can be placed upstream of the mine calibration nozzle applied and with the hot melt adhesive covered mine can simultaneously through the calibration nozzle be moved through. This procedure is carried out with the help of performed hot melt adhesive bath mentioned above. With the lead covered with hot melt adhesive can then simultaneously be moved through the calibration nozzle to defined To achieve ratios with the hot melt adhesive.
- a very time-saving process results from the fact that the attachment of the lead between the two housing parts by means of microwave radiation. While in use a so-called nutleime for drying on the order of eight Hours are required, it is when using the said hot melt adhesive possible, the microwave radiation just soak in for a few seconds to get the to implement corresponding mechanically firm connection.
- step a the figure shows a mine 10 which is only drawn in sections.
- Process step b shows the mine 10, on which a layer 12 from a Hot melt adhesive has been applied. This happens in that the mine 10 in a bath of a hot Hot melt adhesive is immersed.
- Mine 10 can a ready-made writing lead or one cosmetic powder lead or the like act. In any case acts it is a mine 10 from a non-melting Material.
- a calibration nozzle 14 illustrates through which the with the hot melt adhesive layer 12 coated mine 10 is moved through what through the Arrow 16 is indicated. Using the calibration nozzle 14 excess hot melt adhesive material from mine 10 removed so that downstream of the calibration nozzle 14 there is a mine 10 on which a precisely defined one Amount of hot melt adhesive material sticks, or which one defined outer diameter.
- Process step d is intended to introduce the with the well-defined hot melt adhesive layer 12 covered mine 10 in a first housing part 18 and the attachment of a second housing part 20 on the mine 10 equipped clarify the first housing part 18.
- Each of the two Housing parts 18, 20 is formed with a groove 22 which for receiving the lead coated with the hot melt adhesive 12 10 serves.
- housing parts 18 and 20 are one finished pen drawn, it has been useful however proved if instead of such housing parts suitably shaped boards with a number next to each other parallel grooves 22 for use reach.
- the fixation of the mine 10 between the two housing parts 18 and 20 takes place by means of microwave radiation.
- the Bonding of the housing parts 18 and 20 can be done by a known gluing happen.
Landscapes
- Adhesives Or Adhesive Processes (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
Description
Die Erfindung betrifft ein Verfahren zur Herstellung eines Stiftes, wobei in eine Nut eines ersten Gehäuseteiles eine Mine eingebracht und am ersten Gehäuseteil mit der Mine anschließend ein mit einer Nut ausgebildetes zweites Gehäuseteil angebracht und die Mine mit den Gehäuseteilen und die beiden Gehäuseteile miteinander verklebt werden.The invention relates to a method for producing a Pin, a in a groove of a first housing part Mine inserted and on the first housing part with the mine then a second formed with a groove Housing part attached and the lead with the housing parts and the two housing parts are glued together.
Zur Herstellung eines Stiftes ist das sog. Bonding-Verfahren bekannt, bei welchem ein Kleber mehrmals ringförmig oder in einer Netzstruktur auf die Mine aufgetragen wird. Das Bonding-Verfahren dient also zur Fixierung der Mine in der Nut eines ersten Gehäuseteiles bzw. zur Fixierung der Mine zwischen den beiden mit entsprechenden Nuten ausgebildeten Gehäuseteilen. Nachteilig ist, daß es nur schwer möglich ist, einen Kleber in der genannten Weise, d.h. mit dem Bonding-Verfahren, auf eine Mine aufzubringen.The so-called bonding process is used to manufacture a pen known, in which an adhesive several times ring-shaped or in a network structure on the mine is applied. The bonding process is used for Fixing the lead in the groove of a first housing part or to fix the lead between the two with corresponding grooves trained housing parts. The disadvantage is that it is difficult to use an adhesive in the manner mentioned, i.e. with the bonding process to build a mine.
Es ist auch bekannt, fertige Minen mit einer harten, d .h. unflexiblen Lack- oder Kunststoffschicht zu überziehen, um die Bruchfestigkeit der Minen zu erhöhen. Das gleiche Verfahren, d.h. fertige minen zur Erhöhung der Bruchfestigkeit mit einer harten, unflexiblen Lack- oder Kunststoffschicht zu überziehen, wird bspw. angewandt, um bei Minen mit wasserlöslichen Farbstoffen, wie sei bspw. bei sog. Kopierstiften zur Anwendung gelangen, oder bei emulgatorhaltigen pigmentierten Texturen, wie sie bspw. bei sog. wasservermalbaren Stiften zur Anwendung gelangen, eine Diffusion des Farbstoffes bzw. von Bestandteilen eines durch Wasser anlösbaren Pigmentes in das Holz der Gehäuseteile während des Einklebens bzw. Einleimens der Minen zwischen den Gehäuseteilen zu verhindern.It is also known to produce finished mines with a hard, i.e. to coat inflexible lacquer or plastic layer to increase the breaking strength of the mines. The same Process, i.e. finished refills to increase the Breaking strength with a hard, inflexible lacquer or Coating plastic layer is used, for example, to in mines with water-soluble dyes, such as come to use with so-called copy pens, or at emulsifier-containing pigmented textures, such as those used in so-called water-soluble pencils are used, a Diffusion of the dye or components of a pigment soluble in water into the wood of the Housing parts during gluing or gluing To prevent mines between the housing parts.
Bei auf Wasser basierenden Rezepturen von Minen ist es bislang erforderlich, aus jedem Rezeptur-Ansatz probeweise Minen zu extrudieren und zu trocknen, um die durch den Trocknungsvorgang bedingte Schrumpfung der Probe-Minen, die rezepturabhängig unterschiedlich ausfällt, festzustellen und zu berücksichtigen bzw. auszugleichen. Das bedingt nicht nur einen erheblichen Zeitaufwand sondern in der Fertigung solcher Stifte einen Unsicherheitsfaktor. Außerdem können beim Schneiden und beim Auflegen des extrudierten Minen-Stranges Dehnungen oder Stauchungen der Minen nicht zuverlässig ausgechlossen werden, welche zu Dickenschwankungen der Minen führen können.Außer diesen Minen-Toleranzen können auch die Nuten in den Gehäuseteilen gewisse Toleranzen aufweisen, d.h. z.B. unterschiedlich tief ausfallen, was dann beim Einleimen der Minen in die Nuten, d.h. zwischen den beiden Gehäuseteilen, zu Schwierigkeiten führen kann.It is with water-based recipes from mines Previously required, on a trial basis from each recipe approach Extrude and dry mines to pass through the Drying process caused shrinkage of the sample mines varies depending on the recipe and to consider or compensate. That requires not only a considerable amount of time but in the Manufacturing such pens is an uncertainty factor. In addition, when cutting and hanging up the extruded lead strand strains or compressions of the Mines cannot be reliably excluded, which too Except for these, the thickness of the mines can fluctuate Mine tolerances can also be the grooves in the housing parts have certain tolerances, i.e. e.g. differently turn out deep, what then when gluing the mines into the Grooves, i.e. between the two housing parts, too Can cause difficulties.
Ein Verfahren zur Herstellung von Bleistiften, bei welchem ein wasserlöslicher Leim zum Einleimen der minen zwischen Schafthälften angewandt wird, ist aus der GB 471 340 bekannt. Ein ähnliches Verfahren zeigt die FR 781 976.A method of making pencils in which a water-soluble glue for gluing the mines between Shaft halves used is from GB 471 340 known. A similar process is shown in FR 781 976.
Eine Maschine zum Herstellen von Bleistiften, bei der eine Leim-Vorrichtung vorgesehen ist, ist aus dem "Journal of Microwave Power", 10(1), 1975, Seiten 19 bis 26 bekannt. Dort kommt eine Mikrowellen-Heizeinrichtung zum Einsatz.A pencil making machine where one Glue device is provided, is from the "Journal of Microwave Power ", 10 (1), 1975, pages 19 to 26. A microwave heating device is used there.
Eine Vorrichtung zum Brettchenverleimen bei der
Schreibstiftherstellung ist aus der DE 22 65 723 bekannt.A device for gluing boards at the
Pen production is known from
Aus der DE-AS 1 230 329 ist ein Verfahren zur festen Verbindung einer Bleistiftmine mit einer Bleistiftumhüllung bekannt. Dort kommt ein mikroporöser Leimüberzug, d.h. ein stark verdünnter Kunststoffleim, zur Anwendung. Das Verdünnungsverhältnis beträgt bspw. 1:10. Bei diesem bekannten Verfahren werden Bleistiftminen in eine stark verdünnte disperse Kunststoffleim-Emulsion eingebracht. Hierbei handelt es sich um einen Polyvinylacetat-Leim. Überschüssige Leimlösung soll dann einfach von den Minen ablaufen oder sie wird durch Schleudern entfernt. Ein Durchbewegen der mit Kunststoffleim bedeckten Bleistiftminen durch eine Kalibrierdüse erfolgt bei diesem bekannten Verfahren nicht.DE-AS 1 230 329 describes a method for solid Connection of a pencil lead with a pencil cover known. There comes a microporous glue coating, i.e. a highly diluted plastic glue, for use. The Dilution ratio is 1:10, for example. With this known methods are pencil leads into a strong dilute disperse plastic glue emulsion introduced. This is a polyvinyl acetate glue. Excess glue solution should then simply be removed from the mines run off or it is removed by spinning. A Moving through the covered with plastic glue Pencil leads through a calibration nozzle take place at this known methods not.
Aus der DE 33 30 119 C2 ist es bekannt, die hohen Anforderungen an die Maßgenauigkeit und Sauberkeit der Nuten in den Schafthälften bzw. -brettchen von Stiften dadurch zu vermeiden, daß ein elastischer Zweikomponenten-Reaktionsklebstoff auf die entsprechende Mine oder in die entsprechende Nut bzw Schaftbohrung eingebracht wird. Dabei können die beiden Komponenten des Klebstoffs gemeinsam oder voneinander getrennt auf- bzw. eingebracht werden. Eine Kalibrierung des Zweikomponenten-Klebstoffes ist nicht vorgesehen.From DE 33 30 119 C2 it is known the high Requirements for dimensional accuracy and cleanliness of the Grooves in the shaft halves or boards of pins thereby avoiding the use of an elastic two-component reaction adhesive on the corresponding mine or in the appropriate groove or shaft bore is introduced. Here can the two components of the adhesive together or be applied or introduced separately from one another. A Calibration of the two-component adhesive is not intended.
Die DE-GM 7 038 350 unterscheidet zwischen einem sog. "Weißleim", d.h. einer Polyvinylacetat-Dispersion für die Verleimung der Hälften des Holzmantels eines Stiftes und einem Schmelzkleber zum Einkleben der Mine in die Hälften des Holzmantels. Hier kommen also zwei voneinander verschiedene Klebermaterialien zum Einsatz.DE-GM 7 038 350 distinguishes between a so-called "White glue", i.e. a polyvinyl acetate dispersion for the Gluing the halves of the wooden jacket of a pencil and a hot melt adhesive to glue the lead in half of the wooden jacket. So here come two from each other various adhesive materials for use.
Aus der GB 956 119 ist es bekannt, mit Nuten ausgebildete Holzbrettchen mit einer Klebstoffschicht zu versehen, wobei die Klebstoffschicht die Nuten und die ebenen Flächenabschnitten zwischen benachbarten Nuten bedeckt.From GB 956 119 it is known to be formed with grooves To provide wooden boards with an adhesive layer, whereby the adhesive layer the grooves and the planes Covered areas between adjacent grooves.
Aus der DE-AS 25 04 103 ist eine Vorrichtung zum Beschichten eines Stranges bzw. einer Stiftmine mit Farbe oder mit Lack bekannt. Mit einem Schmelzkleber ist eine derartige Farbe oder ein solcher Lack nicht vergleichbar.From DE-AS 25 04 103 a device for Coating a strand or a pencil lead with paint or known with varnish. With a hot melt adhesive is one such a paint or varnish is not comparable.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art zu schaffen, mit welchem die oben erwähnten Probleme eliminiert werden, d.h. mit welchem insbes. Toleranzen der Minen bzw. Toleranzen der Nuten in den Gehäuseteilen einfach ausgleichbar sind, so daß die besagten Stifte mit hoher Produktivität bei geringem Fertigungsausschuß produziert werden können.The invention has for its object a method of to create the type mentioned above, with which the above mentioned problems are eliminated, i.e. with which in particular. Tolerances of the leads or tolerances of the grooves in the housing parts are easily compensated so that the said pens with high productivity at low Manufacturing committee can be produced.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Mine in ein Bad eines flexiblen Schmelzklebers eingebracht wird, in welchem die Mine mit einer Schicht aus dem Schmelzkleber bedeckt wird, und daß die mit dem Schmelzkleber bedeckte Mine anschließend durch eine Kalibrierdüse durchbewegt wird, so daß die Außenabmessungen der Schicht aus flexiblem Schmelzkleber innerhalb kontrollierter vorgegebener Fertigungstoleranzen liegen, und daß die Mine anschließend in die Nut des ersten Gehäuseteils eingebracht und zwischen den beiden Gehäuseteilen festgelegt wird, wobei die Befestigung der Mine zwischen den beiden Gehäuseteilen mittels Mikrowellenstrahlung erfolgt.This object is achieved in that the Inserted mine in a bath of flexible hot melt adhesive in which the mine is covered with a layer of Hot melt adhesive is covered, and that with the Mine then covered with a hot melt adhesive Calibration nozzle is moved through, so that the outer dimensions the layer of flexible hot melt adhesive inside controlled, specified manufacturing tolerances, and that the mine then into the groove of the first Inserted part of the housing and between the two Housing parts is set, the attachment of the Mine between the two housing parts by means of Microwave radiation takes place.
Durch die flexibel nachgiebige Schmelzkleberschicht können Fertigungstoleranzen der Minen, wie sie bspw. durch Trocknungs-Schrumpfung oder durch Dehnung bzw. Stauchung bewirkt werden und außerdem auch Abmessungstoleranzen der zur Aufnahme der Minen dienenden Nuten in den Gehäuseteilen ausgeglichen werden, so daß die Befestigung der Minen zwischen den Gehäuseteilen problemlos, d.h. mit geringem Fertigungsausschuß möglich ist. Mit Hilfe des flexiblen Schmelzklebers können die Minen zwischen den zugehörigen Gehäuseteilen eingeklemmt werden, ohne daß es zu Beschädigungen der Minen kommt. Der flexible Schmelzkleber garantiert also einen paßgenauen Sitz jeder Mine in der Nut des entsprechenden Gehäuseteiles. Selbst Nuten mit einem unrunden Querschnittsprofil können mit Hilfe des flexiblen Schmelzklebers ausgeglichen werden. Durch den flexiblen Schmelzkleber kann ein sonst üblicher Nut-Leim entfallen, was bedeutet, daß die Restfeuchte der Stifte nur von der Menge des Leimes zum Verleimen der Gehäuseteile abhängig und somit vergleichsweise gering ist. Infolge dieser vergleichsweise geringen Restfeuchte kann in vorteilhafter Weise auf eine zeitaufwendige Nachtrocknung der Stifte verzichtet werden, so daß die Produktionszeiten erheblich reduziert werden. Weitere Vorteile des erfindungsgemäßen Verfahrens bestehen darin, daß Minen mit wasserlöslichen Farbstoffen oder Minen aus pigmentierten Formulierungen mit Emulgatorzusatz durch die flexible Schmelzkleberschicht eine Schutzschicht gegen das sog. Ausbluten, d.h. gegen eine Diffusion des Farbstoffes der Minen in das Holz der Gehäuseteile erhalten, daß die Minen durch den Schmelzkleber vor dem Eindringen von Feuchtigkeit aus dem Leim beim Verkleben geschützt werden, so daß irreparable Qualitätsveränderungen der Minen verhindert werden, daß die Standfestigkeit der Minen-Spitzen und daß die Spitzbarkeit bzw. insbes. die Handspitzbarkeit der Minen der erfindungsgemäß hergestellten Stifte verbessert ist. Außerdem wird die Emission von Lösungsmitteldämpfen vermieden, so daß auf aufwendige Absaugvorrichtungen, wie sie bspw. beim Lackieren von Minen zum Einsatz gelangen, verzichtet werden kann. Ein erheblicher Vorteil wird in der Umweltfreundlichkeit des erfindungsgemäßen Verfahrens gesehen.Thanks to the flexible, flexible hot melt adhesive layer Manufacturing tolerances of the mines, such as through Drying shrinkage or by stretching or compression are effected and also dimensional tolerances of the for receiving the mine-serving grooves in the housing parts be balanced so that the attachment of the mines between the housing parts without any problems, i.e. with little Manufacturing committee is possible. With the help of the flexible Hot melt glue can be used between the leads Housing parts are pinched without it Damage to the mines is coming. The flexible hot melt adhesive guarantees that every mine fits snugly in the groove of the corresponding housing part. Even grooves with one Non-circular cross-sectional profile can be created using the flexible Hot melt adhesive can be compensated. Because of the flexible Hot melt adhesive can be dispensed with an otherwise usual groove glue, which means that the residual moisture of the pens only from the Amount of glue for gluing the housing parts depending and is therefore comparatively small. As a result of this comparatively low residual moisture can be more advantageous In a time-consuming post-drying of the pens to be dispensed with, so that production times are considerable be reduced. Further advantages of the invention The procedure is that mines with water-soluble Dyes or leads from pigmented formulations with Emulsifier additive through the flexible hot melt adhesive layer a protective layer against so-called bleeding, i.e. against a diffusion of the dye of the mines into the wood of the Housing parts received that the mines through the Hot melt adhesive before moisture penetration from the Glue are protected when gluing, so that irreparable Changes in the quality of the mines are prevented Stability of the mine tips and that the sharpenability or in particular the hand-sharpenability of the mines of the Pins produced according to the invention is improved. In addition, the emission of solvent vapors avoided, so that on complex suction devices, such as they are used, for example, when painting mines, can be dispensed with. A significant advantage is in the Environmental friendliness of the method according to the invention seen.
Erfindungsgemäß wird die Mine in ein Bad des Schmelzklebers eingebracht, in welchem die Mine mit einer Schicht aus dem Schmelzkleber bedeckt wird. Die mit dem Schmelzkleber bedeckte Mine wird anschließend durch eine Kalibrierdüse durchbewegt. Mit Hilfe der Kalibrierdüse wird überschüssiger Schmelzkleber von der Mine entfernt, so daß sich bezüglich der Außenabmessungen der mit dem Schmelzkleber bedeckten Minen genau definierte Verhältnisse ergeben. Das ist für eine Massenfertigung mit ihren Toleranzeinflüssen von Wichtigkeit.According to the mine is in a bath of hot melt adhesive introduced in which the mine with a layer of the Hot melt adhesive is covered. The one with the hot melt adhesive covered mine is then passed through a calibration nozzle moved through. With the help of the calibration nozzle excess hot melt adhesive removed from the mine, so that the outer dimensions of the with the Hot melt adhesive covered mines in precisely defined conditions surrender. This is for mass production with yours Tolerance influences of importance.
Bei Durchführung des erfindungsgemäßen Verfahrens können die Verfahrensschritte des Einbringens der Mine in das Bad des heißen Schmelzklebers und des Durchbewegens der mit dem Schmelzkleber bedeckten Mine durch die kalibrierdüse voneinander getrennt sein. Eine hohe Produktivität wird jedoch erreicht, wenn die Mine durch das Bad des Schmelzklebers und unmittelbar anschließend durch die Kalibrierdüse durchbewegt wird. Zu diesem Zweck kann die Wandung des Bad-Behälters des heißen Schmelzklebers mit wenigstens einer entsprechenden Kalibrierdüse ausgebildet sein. When carrying out the method according to the invention the process steps of placing the mine in the bath of hot melt glue and moving it with that Hot melt adhesive covered mine through the calibration nozzle be separated from each other. High productivity will however, when the mine reached through the bath of the Hot melt adhesive and immediately afterwards through the Calibration nozzle is moved. For this purpose the Wall of the hot melt adhesive bath container with formed at least one corresponding calibration nozzle be.
Der Schmelzkleber kann auf die Mine stromaufwärts vor der kalibrierdüse aufgebracht und die mit dem Schmelzkleber bedeckte Mine kann simultan durch die Kalibrierdüse durchbewegt werden. Dieses Verfahren wird mit Hilfe des oben erwähnten Schmelzkleber-Bades durchgeführt. Die mit dem Schmelzkleber bedeckte Mine kann dann gleichzeitig durch die Kalibrierdüse durchbewegt werden, um definierte Verhältnisse bzgl. des Schmelzklebers zu erzielen.The hot melt adhesive can be placed upstream of the mine calibration nozzle applied and with the hot melt adhesive covered mine can simultaneously through the calibration nozzle be moved through. This procedure is carried out with the help of performed hot melt adhesive bath mentioned above. With the lead covered with hot melt adhesive can then simultaneously be moved through the calibration nozzle to defined To achieve ratios with the hot melt adhesive.
Ein sehr zeitsparendes Verfahren ergibt sich dadurch, daß die Befestigung der Mine zwischen den beiden Gehäuseteilen mittels Mikrowellenstrahlung erfolgt. Während bei Anwendung eines sog. Nutleims zur Trocknung größenordnungsmäßig acht Stunden erforderlich sind, ist es bei Anwendung des besagten Schmelzklebers möglich, die Mikrowellenstrahlung nur während weniger Sekunden einwirken zu lassen, um die entsprechende mechanisch feste Verbindung zu realisieren.A very time-saving process results from the fact that the attachment of the lead between the two housing parts by means of microwave radiation. While in use a so-called nutleime for drying on the order of eight Hours are required, it is when using the said hot melt adhesive possible, the microwave radiation just soak in for a few seconds to get the to implement corresponding mechanically firm connection.
Weitere Einzelheiten, Merkmale und Vorteile ergeben sich aus der nachfolgenden Beschreibung von in der Zeichnung schematisch angedeuteten aufeinanderfolgenden Arbeitsschritten des erfindungsgemäßen Verfahrens.Further details, features and advantages emerge from the following description of in the drawing schematically indicated successive Steps of the method according to the invention.
Die Figur zeigt im Verfahrensschritt a eine Mine 10, die
nur abschnittweise gezeichnet ist. Der Verfahrensschritt b
zeigt die Mine 10, auf welche eine Schicht 12 aus einem
Schmelzkleber aufgebracht worden ist. Das geschieht
dadurch, daß die Mine 10 in ein Bad eines heißen
Schmelzklebers eingetaucht wird. Bei der Mine 10 kann es
sich um eine fertigpräparierte Schreibmine oder um eine
kosmetische Pudermine o.dgl. handeln. In jedem Fall handelt
es sich um eine Mine 10 aus einem nicht schmelzenden
Material. In step a, the figure shows a
Im Verfahrensschritt c ist eine kalibrierdüse 14
verdeutlicht, durch welche die mit der Schmelzkleberschicht
12 überzogene Mine 10 hindurchbewegt wird, was durch den
Pfeil 16 angedeutet ist. Mit Hilfe der Kalibrierdüse 14
wird überschüssiges Schmelzklebermaterial von der Mine 10
entfernt, so daß stromabwärts nach der Kalibrierdüse 14
eine Mine 10 gegeben ist, an welcher eine genau definierte
Menge Schmelzklebermaterial haftet, bzw. welche einen
definierten Außendurchmesser aufweist.In method step c there is a
Der Verfahrensschritt d soll das Einbringen der mit der
genau definierten Schmelzkleberschicht 12 bedeckten Mine 10
in ein erstes Gehäuseteil 18 und das Anbringen eines
zweiten Gehäuseteiles 20 am mit der Mine 10 bestückten
ersten Gehäuseteil 18 verdeutlichen. Jedes der beiden
Gehäuseteile 18, 20 ist mit einer Nut 22 ausgebildet, die
zur Aufnahme der mit dem Schmelzkleber 12 überzogenen Mine
10 dient.Process step d is intended to introduce the with the
well-defined hot melt
Im Verfahrensschritt d sind Gehäuseteile 18 und 20 eines
fertigen Stiftes gezeichnet, als zweckmäßig hat es sich
jedoch erwiesen, wenn anstelle solcher Gehäuseteile
entsprechend geformte Brettchen mit einer Anzahl
nebeneinander parallel ausgebildeter Nuten 22 zur Anwendung
gelangen.In method step d,
Die Fixierung der Mine 10 zwischen den beiden Gehäuseteilen
18 und 20 erfolgt mittels Mikrowellenstrahlung. Die
Verklebung der Gehäuseteile 18 und 20 kann durch eine an
sich bekannte Verleimung geschehen.The fixation of the
Claims (3)
- Process for making a pencil, in which a lead (10) is introduced into a groove (22) of a first housing component (18) and a second housing component (20) provided with a groove (22) is subsequently fitted to the first housing component (18) provided with the lead, and the lead (10) is adhesively bonded to the housing components (18, 20) and the two housing components (18, 20) are adhesively bonded to one another, characterized in that the lead (10) is introduced into a bath of a flexible melt adhesive in which the lead (10) is coated with a layer (12) of the melt adhesive, and in that the lead (10) coated with the melt adhesive is subsequently moved through a calibration nozzle (14), so that the external dimensions of the layer (12) of flexible melt adhesive lie within monitored prescribed manufacturing tolerances, and in that the lead (10) is subsequently introduced into the groove (22) of the first housing component (18) and is fixed between the two housing components (18, 20), the lead (10) being fixed between the two housing components (18, 20) by means of microwave radiation.
- Process according to Claim 1, characterized in that the lead (10) is moved through the bath of the melt adhesive and is directly afterwards moved through the calibration nozzle (14).
- Process according to Claim 1, characterized in that a melt adhesive is applied to the lead (10) upstream of a calibration nozzle (14), and in that the lead (10) coated with the melt adhesive is simultaneously moved through the calibration nozzle (14).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4124210 | 1991-07-20 | ||
| DE4124210A DE4124210A1 (en) | 1991-07-20 | 1991-07-20 | METHOD FOR PRODUCING A PEN |
| PCT/EP1992/001621 WO1993001944A1 (en) | 1991-07-20 | 1992-07-16 | Process for making a pencil |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0595917A1 EP0595917A1 (en) | 1994-05-11 |
| EP0595917B1 EP0595917B1 (en) | 1995-04-05 |
| EP0595917B2 true EP0595917B2 (en) | 1998-11-11 |
Family
ID=6436707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92915797A Expired - Lifetime EP0595917B2 (en) | 1991-07-20 | 1992-07-16 | Process for making a pencil |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5549779A (en) |
| EP (1) | EP0595917B2 (en) |
| DE (2) | DE4124210A1 (en) |
| MX (1) | MX9202890A (en) |
| WO (1) | WO1993001944A1 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2964914B2 (en) * | 1995-05-19 | 1999-10-18 | ヤマハ株式会社 | Manufacturing method of steering wheel |
| US6062753A (en) * | 1998-08-17 | 2000-05-16 | Pentech International Inc. | Writing instrument with enhanced tactile control and gripping comfort and method of making same |
| US6179502B1 (en) | 1999-02-10 | 2001-01-30 | Dixon Ticonderoga Company | Writing instrument with locking core |
| US6284079B1 (en) | 1999-03-03 | 2001-09-04 | International Business Machines Corporation | Method and structure to reduce low force pin pull failures in ceramic substrates |
| FR2802148B1 (en) | 1999-12-13 | 2003-01-24 | Conte | PROCESS FOR THE MANUFACTURE BY TRI-EXTRUSION OF A PENCIL TO BE WRITING OR TO BE COLORED AND THE PENCIL TO BE WRITING OR TO BE COLORED COMPRISING A PROTECTIVE INTERMEDIATE LAYER |
| US20040175223A1 (en) * | 2003-03-04 | 2004-09-09 | Berry Grant Lloyd | Cosmetic pencil |
| EP1464248A1 (en) * | 2003-04-04 | 2004-10-06 | Schwan-STABILO Cosmetics GmbH & Co. KG | Cosmetic pencil and method of manufacturing |
| US20060147252A1 (en) * | 2005-01-03 | 2006-07-06 | Kathleen Torrell | Liquid graphite pencil |
| DE102005004175B4 (en) * | 2005-01-26 | 2013-11-28 | J. S. Staedtler Gmbh & Co. Kg | Mine for writing, drawing or painting equipment |
| CN1872922A (en) * | 2005-04-16 | 2006-12-06 | Jakks太平洋有限公司 | Liquid graphite |
| DE102008022969A1 (en) | 2008-05-09 | 2008-11-20 | Clariant International Limited | Permanent coating agent for writing, marking or painting device and cosmetic pencils, particularly for wooden pencils, contains one or multiple homo or copolymer waxes or polar modified homo or copolymer waxes |
| DE102018103386A1 (en) * | 2018-02-15 | 2019-08-22 | Schwan-Stabilo Cosmetics Gmbh & Co. Kg | Process for the production of powdery mines and products made therewith |
| DE202018100825U1 (en) | 2018-02-15 | 2019-05-20 | Schwan-Stabilo Cosmetics Gmbh & Co. Kg | powder mines |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1892508A (en) * | 1931-03-27 | 1932-12-27 | Eagle Pencil Co | Lead pencil and method of making the same |
| FR781976A (en) * | 1934-11-30 | 1935-05-25 | American Lead Pencil Co | Improvements to pencils and their manufacturing process |
| GB471340A (en) * | 1935-08-14 | 1937-09-02 | Eagle Pencil Co | Improvements in or relating to lead pencils |
| US2098452A (en) * | 1936-01-31 | 1937-11-09 | Eagle Pencil Co | Art of lead pencil manufacture |
| US2319585A (en) * | 1941-01-07 | 1943-05-18 | Eagle Pencil Co | Pencil |
| FR969976A (en) * | 1948-07-01 | 1950-12-28 | Making a pencil with a lead and synthetic plastics | |
| GB956119A (en) * | 1963-02-04 | 1964-04-22 | Hassenfeld Bros Inc | Improvements in or relating to a lead pencil and method of manufacture |
| DE1230329B (en) * | 1960-07-30 | 1966-12-08 | Faber Castell A W | Process for achieving an intimate connection between the pencil lead and the pencil case |
| DE2217904C3 (en) * | 1972-04-13 | 1980-04-10 | Karl Dipl.-Ing. 8500 Nuernberg Zuber | Lead insertion and gluing device for pencil boards |
| DE2265723C2 (en) * | 1972-08-30 | 1985-05-02 | Fr. Ehrhardt Bleistiftmaschinenfabrik GmbH & Co, 8500 Nürnberg | Device for gluing boards in pen manufacture |
| DE2242669C2 (en) * | 1972-08-30 | 1982-08-26 | Fr. Ehrhardt Bleistiftmaschinenfabrik GmbH & Co, 8500 Nürnberg | Method and device for gluing boards in pen manufacture |
| US3882819A (en) * | 1974-04-17 | 1975-05-13 | Hasbro Industries Inc | Device for coating elements of continuous length |
| DE2845078C2 (en) * | 1978-10-17 | 1982-05-27 | Fa. J.S. Staedtler, 8500 Nürnberg | Pen and process for its manufacture |
| DE3330119A1 (en) * | 1983-08-20 | 1985-03-07 | Fa. J.S. Staedtler, 8500 Nürnberg | PEN OR CHALK AND METHOD FOR THE PRODUCTION THEREOF |
| US5244297A (en) * | 1991-03-19 | 1993-09-14 | Conte S.A. | Process for manufacturing pencil by tri-extrusion and the produced pencil having an intermediate protective casing |
-
1991
- 1991-07-20 DE DE4124210A patent/DE4124210A1/en active Granted
-
1992
- 1992-06-15 MX MX9202890A patent/MX9202890A/en not_active IP Right Cessation
- 1992-07-16 WO PCT/EP1992/001621 patent/WO1993001944A1/en active IP Right Grant
- 1992-07-16 US US08/182,138 patent/US5549779A/en not_active Expired - Fee Related
- 1992-07-16 DE DE59201852T patent/DE59201852D1/en not_active Expired - Fee Related
- 1992-07-16 EP EP92915797A patent/EP0595917B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0595917B1 (en) | 1995-04-05 |
| DE59201852D1 (en) | 1995-05-11 |
| EP0595917A1 (en) | 1994-05-11 |
| US5549779A (en) | 1996-08-27 |
| MX9202890A (en) | 1993-01-01 |
| WO1993001944A1 (en) | 1993-02-04 |
| DE4124210A1 (en) | 1993-01-21 |
| DE4124210C2 (en) | 1993-07-08 |
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