EP0286022A1 - Coil bodies and method for producing them - Google Patents
Coil bodies and method for producing them Download PDFInfo
- Publication number
- EP0286022A1 EP0286022A1 EP88105255A EP88105255A EP0286022A1 EP 0286022 A1 EP0286022 A1 EP 0286022A1 EP 88105255 A EP88105255 A EP 88105255A EP 88105255 A EP88105255 A EP 88105255A EP 0286022 A1 EP0286022 A1 EP 0286022A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- solder pins
- pins
- solder
- injected
- injection
- 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
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F5/00—Coils
- H01F5/04—Arrangements of electric connections to coils, e.g. leads
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/10—Connecting leads to windings
Definitions
- the invention relates to a process for the production of injection-molded plastic bobbins with solder pins, in which the solder pins are inserted into the injection mold and then injected into the material of the coil former.
- the invention further relates to a coil former produced by such a method.
- solder pins It has been known for many years to produce such bobbins in a rational manner by inserting the soldering pins into the injection mold and overmolding with the material of the bobbin so that they are already firmly anchored in the bobbin by the spraying process.
- the solder pins usually have a thickened head which improves the anchoring of the solder pin in the coil former against axial pull-out forces.
- solder pins are usually made of copper, bronze, brass, nickel silver or similar metals. Such solder pins are not readily solderable. Therefore, galvanized or hot-dip tinned soldering pins are used in known technology, which are delivered with the tinned surface and in the injection mold are introduced. The same applies in the event that the solder pins are fed from a wire roll into the injection mold and cut off there. The corresponding wires also have tin-plated surfaces.
- Coil formers that have to meet higher requirements with regard to the solderability of their soldering pins must therefore either be manufactured with particular care or subjected to thorough testing and sorting with a high rejection rate.
- the invention is based on the object of specifying a method with which coil formers with injected solder pins can be manufactured in such a way that the solder pins have a high level of solderability which also meets high requirements.
- solder pins without a surface coating are inserted into the injection mold and then injected into the material of the coil former, and that the solder pins are then immersed in a flux and then provided with a metal coating.
- the metal coating is by one dip into a lead-tin bath.
- the above-mentioned object is also achieved with a coil body made of injection-molded plastic with solder pins with a tinned surface injected into a terminal block if the solder sticks have a non-surface-treated section which projects into the plastic body and, moreover, a hot-dip tinned surface.
- the coil formers are manufactured in a departure from the process that has been common for decades, namely with solder pins that have not been surface-treated. It has been shown that a completely flawless surface of the untreated solder pins can be produced if they are immersed in a flux and then provided with the metal coating, preferably by immersion in a lead-zinc bath. Compared to other conceivable methods of applying the metal coating to the injected soldering pins, immersion in the lead-zinc bath has the advantage that the coil body can be kept free of the metallic coating in a defined manner without special measures being required for this.
- solder pins therefore do not have a surface coating, insofar as they are surrounded by the plastic body, but only receive this on the part protruding from the plastic body. Since the preferably hot-dip galvanized surface is produced according to the invention in a last manufacturing step, it is not subject to any subsequent mechanical loads and can therefore reach the user completely intact, so that it also meets the highest requirements for solderability.
- pre-cut solder pins are inserted into the injection mold or the solder pins are fed from a wire roll and only when, before or after the injection is closed be cut shape.
- the drawing shows a simple exemplary embodiment of a coil former according to the invention, the left side of the symmetrical coil former being shown in a view and the right side in a section.
- the coil former has flanges 2 on both sides of a winding space 1.
- a terminal block 3 into which solder pins 4 are injected.
- the solder pins 4 have a thickened head 5, which makes it difficult to pull the solder pins 4 out of the terminal block 3.
- solder pins are bare within the terminal block 3, i.e. executed without a surface.
- the parts of the soldering pins 4 protruding from the coil body, on the other hand, are provided with a subsequently applied surface layer 6, which is produced, for example, by immersing them in a lead-tin bath (lead: tin 40:60 proportions).
- the immersion depth can be set very precisely, so that the solder pin 4 can be provided with the surface layer 6 practically over the entire length protruding from the terminal block 3.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Coils Or Transformers For Communication (AREA)
- Molten Solder (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Herstellung von gespritzten Kunststoff-Spulenkörpern mit Lötstiften, bei dem die Lötstifte in die Spritzform eingeführt und anschließend in das Material des Spulenkörpers eingespritzt werden. Die Erfindung betrifft ferner einen nach einem derartigen Verfahren hergestellten Spulenkörper.The invention relates to a process for the production of injection-molded plastic bobbins with solder pins, in which the solder pins are inserted into the injection mold and then injected into the material of the coil former. The invention further relates to a coil former produced by such a method.
Es ist seit vielen Jahren bekannt, derartige Spulenkörper in rationeller Weise dadurch herzustellen, daß die Lötstifte in die Spritzform eingeführt und mit dem Material des Spulenkörpers umspritzt werden, so daß sie bereits durch den Spritzvorgang in dem Spulenkörper fest verankert sind. Zur Verbesserung der Verankerung weisen die Lötstifte üblicherweise einen verdickten Kopf auf, der die Verankerung des Lötstiftes in dem Spulenkörper gegen axiale Auszugskräfte verbessert.It has been known for many years to produce such bobbins in a rational manner by inserting the soldering pins into the injection mold and overmolding with the material of the bobbin so that they are already firmly anchored in the bobbin by the spraying process. To improve the anchoring, the solder pins usually have a thickened head which improves the anchoring of the solder pin in the coil former against axial pull-out forces.
Die Lötstifte bestehen üblicherweise aus Kupfer, Bronze, Messing, Neusilber oder ähnlichen Metallen. Derartige Lötstifte sind nicht ohne weiteres lötfähig. Es werden daher in bekannter Technik galvanisch verzinnte oder feuerverzinnte Lötstifte verwendet, die mit der verzinnten Oberfläche angeliefert und in die Spritzform eingeführt werden. Gleiches gilt für den Fall, daß die Lötstifte von einer Drahtrolle in die Spritzform zugeführt und dort abgeschnitten werden. Die entsprechenden Drähte weisen ebenfalls galvanisch verzinnte Oberflächen auf.The solder pins are usually made of copper, bronze, brass, nickel silver or similar metals. Such solder pins are not readily solderable. Therefore, galvanized or hot-dip tinned soldering pins are used in known technology, which are delivered with the tinned surface and in the injection mold are introduced. The same applies in the event that the solder pins are fed from a wire roll into the injection mold and cut off there. The corresponding wires also have tin-plated surfaces.
Nähere Untersuchungen haben gezeigt, daß es relativ schwierig ist, Spulenkörper herzustellen, deren Lötstifte höhere Anforderungen an die Lötfähigkeit erfüllen (z.B. MIL-Standard) . Die verzinnte oder feuerverzinnte Oberflache wird beim Spritzvorgang leicht mit Kunststoff verunreinigt. Ein eventuelles Abstrahlen des Kunststoffkörpers zum Entgraten führt zu Beschädigungen der Oberfläche. Bereits beim Einsetzen in das Werkzeug können die Oberflächen durch ein schabendes Einschieben beschädigt werden.Closer investigations have shown that it is relatively difficult to manufacture bobbins whose solder pins meet higher requirements for solderability (e.g. MIL standard). The tinned or hot-tinned surface is easily contaminated with plastic during the spraying process. Any blasting of the plastic body for deburring will damage the surface. The surfaces can be damaged by being scraped in as soon as they are inserted into the tool.
Spulenkörper, die höheren Anforderungen bezüglich der Lötfähigkeit ihrer Lötstifte erfüllen müssen, müssen daher entweder besonders sorgfältig gefertigt oder einer eingehenden Prüfung und Aussortierung mit einer hohen Ausschußquote unterzogen werden.Coil formers that have to meet higher requirements with regard to the solderability of their soldering pins must therefore either be manufactured with particular care or subjected to thorough testing and sorting with a high rejection rate.
Der Erfindung liegt demgegenüber die Aufgabe zugrunde, ein Verfahren anzugeben, mit dem Spulenkörper mit eingespritzten Lötstiften so gefertigt werden können, daß die Lötstifte mit hoher Sicherheit eine auch hohen Anforderungen gerecht werdende Lötfähigkeit aufweisen.In contrast, the invention is based on the object of specifying a method with which coil formers with injected solder pins can be manufactured in such a way that the solder pins have a high level of solderability which also meets high requirements.
Diese Aufgabe wird erfindungsgemäß mit einem Verfahren der eingangs erwähnten Art dadurch gelöst, daß in die Spritzform Lötstifte ohne Oberflächenüberzug eingesetzt und anschließend in das Material des Spulenkörpers eingespritzt werden, und daß danach die Lötstifte in ein Fluxmittel getaucht und anschließend mit einem Metallüberzug versehen werden. Vorzugsweise wird dabei der Metallüberzug durch Ein tauchen in ein Blei-Zinnbad hergestellt.This object is achieved according to the invention with a method of the type mentioned at the outset that solder pins without a surface coating are inserted into the injection mold and then injected into the material of the coil former, and that the solder pins are then immersed in a flux and then provided with a metal coating. Preferably, the metal coating is by one dip into a lead-tin bath.
Die erwähnte Aufgabe wird ferner mit einem Spulenkörper aus gespritztem Kunststoff mit in einer Anschlußleiste eingespritzten Lötstiften mit einer verzinnten Oberfläche gelöst, wenn die Lötstfte einen nicht oberflächenbehandelten, in den Kunststoffkörper ragenden Abschnitt und im übrigen eine feuerverzinnte Oberfläche aufweisen.The above-mentioned object is also achieved with a coil body made of injection-molded plastic with solder pins with a tinned surface injected into a terminal block if the solder sticks have a non-surface-treated section which projects into the plastic body and, moreover, a hot-dip tinned surface.
Erfindungsgemäß werden die Spulenkörper in Abkehr von dem seit Jahrzehnten üblichen Verfahren gefertigt, nämlich mit nicht oberflächenbehandelten Lötstiften. Es hat sich gezeigt, daß eine völlig einwandfreie Oberfläche der unbehandelten Lötstifte herstellbar ist, wenn diese in ein Fluxmittel getaucht und anschließend mit dem Metallüberzug, vorzugsweise durch Eintauchen in ein Blei-Zinkbad, versehen werden. Gegenüber anderen denkbaren Verfahren zur Aufbringung des Metallüberzugs auf die eingespritzten Lötstifte hat das Eintauchen in das Blei-Zinkbad den Vorteil, daß der Spulenkörper in definierter Weise von dem metallischen Überzug freigehalten werden kann, ohne daß hierfür besondere Maßnahmen erforderlich wären. Die Lötstifte weisen daher - soweit sie von dem Kunststoffkörper umgeben sind - keine Oberflächenbeschichtung auf, sondern erhalten diese lediglich an dem aus dem Kunststoffkörper herausragenden Teil. Da die vorzugsweise feuerverzinkte Oberfläche erfindungsgemäß in einem letzten Herstellungsschritt produziert wird, unterliegt sie keinen anschließenden mechanischen Belastungen und kann daher völlig unversehrt zum Anwender gelangen, so daß sie auch höchsten Anforderungen an die Lötfähigkeit gerecht wird.According to the invention, the coil formers are manufactured in a departure from the process that has been common for decades, namely with solder pins that have not been surface-treated. It has been shown that a completely flawless surface of the untreated solder pins can be produced if they are immersed in a flux and then provided with the metal coating, preferably by immersion in a lead-zinc bath. Compared to other conceivable methods of applying the metal coating to the injected soldering pins, immersion in the lead-zinc bath has the advantage that the coil body can be kept free of the metallic coating in a defined manner without special measures being required for this. The solder pins therefore do not have a surface coating, insofar as they are surrounded by the plastic body, but only receive this on the part protruding from the plastic body. Since the preferably hot-dip galvanized surface is produced according to the invention in a last manufacturing step, it is not subject to any subsequent mechanical loads and can therefore reach the user completely intact, so that it also meets the highest requirements for solderability.
Selbstverständlich ist es für das erfindungsgemäße Verfahren völlig unerheblich, ob vorgeschnittene Lötstifte in die Spritzform eingesetzt werden oder die Lötstifte von einer Drahtrolle zugeführt und erst bei, vor oder nach dem Schließen der Spritz form geschnitten werden.Of course, it is completely irrelevant for the method according to the invention whether pre-cut solder pins are inserted into the injection mold or the solder pins are fed from a wire roll and only when, before or after the injection is closed be cut shape.
Die Zeichnung zeigt ein einfaches Ausführungsbeispiel für einen erfindungsgemäßen Spulenkörper, wobei die linke Seite des symmetrischen Spulenkörpers in einer Ansicht und die rechte Seite in einem Schnitt dargestellt ist.The drawing shows a simple exemplary embodiment of a coil former according to the invention, the left side of the symmetrical coil former being shown in a view and the right side in a section.
Der Spulenkörper weist in üblicher Weise auf beiden Seiten eines Wickelraums 1 Flansche 2 auf. An den unteren Flansch schließt sich eine Anschlußleiste 3 an, in die Lötstifte 4 eingespritzt sind. Am eingespritzten Ende weisen die Lötstifte 4 einen verdickten Kopf 5 auf, der den Auszug der Lötstifte 4 aus der Anschlußleiste 3 erschwert.In the usual way, the coil former has
Die Lötstifte sind innerhalb der Anschlußleiste 3 blank, d.h. ohne eine Oberfläche ausgeführt. Die aus dem Spulenkörper herausragenden Teile der Lötstifte 4 sind hingegen mit einer nachträglich aufgebrachten Oberflächenschicht 6 versehen, die beispielsweise durch Eintauchen in ein Blei-Zinnbad (Anteile Blei : Zinn 40 : 60) hergestellt ist.The solder pins are bare within the
Die Eintauchtiefe läßt sich sehr genau einstellen, so daß der Lötstift 4 praktisch über die gesamte, aus der Anschlußleiste 3 herausragenden Länge mit der Oberflächenschicht 6 versehen sein kann.The immersion depth can be set very precisely, so that the
Claims (3)
und daß danach die Lötstifte in ein Fluxmittel getaucht und anschließend mit einem Metallüberzug (6) versehen werden.1. A process for the production of injection molded plastic bobbins with solder pins (4), in which the solder pins (4) are inserted into the injection mold and then injected into the material of the coil former, characterized in that solder pins are used in the injection mold without a surface coating and then be injected into the material of the bobbin
and that the solder pins are then immersed in a flux and then provided with a metal coating (6).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3710783 | 1987-03-31 | ||
DE19873710783 DE3710783A1 (en) | 1987-03-31 | 1987-03-31 | BOBBIN AND METHOD FOR THEIR PRODUCTION |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0286022A1 true EP0286022A1 (en) | 1988-10-12 |
EP0286022B1 EP0286022B1 (en) | 1992-08-26 |
Family
ID=6324523
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88105255A Expired - Lifetime EP0286022B1 (en) | 1987-03-31 | 1988-03-31 | Coil bodies and method for producing them |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0286022B1 (en) |
DE (2) | DE3710783A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19913708A1 (en) * | 1999-03-26 | 2000-09-28 | Hohenloher Kunststofftechnik G | Coil lead terminal for fastening in a body of coil manufacturing by cutting off section of set length and subjecting it to deformation for formation head |
DE10148133A1 (en) | 2001-09-28 | 2003-04-24 | Ascom Energy Systems Ag Bern | Flat transformer with inserted secondary windings |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2448296A1 (en) * | 1974-10-10 | 1976-04-22 | Draloric Electronic | Leads for electronic components fitting on circuit board - consist of a tinned wire or metal strip with solder bead exceed hole internal diameter |
DE3341304A1 (en) * | 1983-11-15 | 1985-05-23 | Hohenloher Spulenkörperfabrik, 7110 Öhringen | Plastic electrical component, and a method for its production |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1763096U (en) * | 1958-01-29 | 1958-03-13 | Max Grundig | FLANGE COIL BODY FOR COILS, COIL COMBINATIONS, TRANSFORMERS OD. DGL. |
-
1987
- 1987-03-31 DE DE19873710783 patent/DE3710783A1/en not_active Withdrawn
-
1988
- 1988-03-31 DE DE8888105255T patent/DE3873956D1/en not_active Expired - Lifetime
- 1988-03-31 EP EP88105255A patent/EP0286022B1/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2448296A1 (en) * | 1974-10-10 | 1976-04-22 | Draloric Electronic | Leads for electronic components fitting on circuit board - consist of a tinned wire or metal strip with solder bead exceed hole internal diameter |
DE3341304A1 (en) * | 1983-11-15 | 1985-05-23 | Hohenloher Spulenkörperfabrik, 7110 Öhringen | Plastic electrical component, and a method for its production |
Also Published As
Publication number | Publication date |
---|---|
DE3710783A1 (en) | 1988-10-20 |
EP0286022B1 (en) | 1992-08-26 |
DE3873956D1 (en) | 1992-10-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2005109606A1 (en) | Coil with a contact sleeve for electrical connection | |
EP1927419B1 (en) | Grid electrode with a grid comprising netted wires having a thick tinning ; Method of manufacturing such a grid electrode | |
DE19928787A1 (en) | Bead inductor manufacture for noise control e.g. for microprocessor | |
EP0125737B1 (en) | Plugging arrangement and method of tin-plating the same before plugging it into the printed-circuit boards | |
DE69404933T2 (en) | Steel wire coated with iron zinc-aluminum alloy and method of manufacture | |
DE3420514C2 (en) | Process for the production of tinned wires | |
EP0286022B1 (en) | Coil bodies and method for producing them | |
EP0811995B1 (en) | Magnet coil and method for manufacturing the same | |
DE19927947A1 (en) | Bead inductor manufacture | |
EP3797181A1 (en) | Copper strip for producing electrical contacts and method for producing a copper strip and plug-in connector | |
DE3246920A1 (en) | SOLDERABLE IRON WIRE | |
DE3316563A1 (en) | Electrical connector and method for its production | |
EP1157449A1 (en) | Method for producing a hooked commutator with a metal layer coating on one face | |
DE10055178C1 (en) | Method for contacting a winding wire of a coil with a connecting pin | |
DE602004012566T2 (en) | Assembly for inductors and methods of manufacture | |
DE1302299C2 (en) | ELECTRIC CAPACITOR ENCLOSED WITH INSULATED COMPOUND AND METHOD FOR MANUFACTURING IT | |
DE10231205A1 (en) | Process for winding transformers | |
EP0473629B1 (en) | Method for producing a coil for transformers, in particular high-voltage transformers | |
DE2138083B2 (en) | Method for attaching the connecting wires of a ceramic capacitor | |
WO2002095776A1 (en) | Inductive miniature component for smd-mounting and method for the production thereof | |
DE2606683A1 (en) | Low current fine wire twisted cables - have terminals formed out of cable material to reduce costs | |
DE3435190A1 (en) | Electrical capacitor having layered dielectric layers, and a method for its production | |
DE2745985B2 (en) | Tantalum electrolytic capacitor | |
DE2101971A1 (en) | Insulated metallic winding body for electrical wire resistors for low-voltage circuits for use in electrically controlled, automatically switching vehicle transmissions | |
DE2250836C3 (en) | Process for the production of an end piece of an electrical conductor made of aluminum cores that can be connected to a connecting terminal |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE DE FR GB NL |
|
17P | Request for examination filed |
Effective date: 19881118 |
|
17Q | First examination report despatched |
Effective date: 19910612 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE DE FR GB NL |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
REF | Corresponds to: |
Ref document number: 3873956 Country of ref document: DE Date of ref document: 19921001 |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19940321 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19940325 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19940328 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19940331 Year of fee payment: 7 Ref country code: BE Payment date: 19940331 Year of fee payment: 7 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19950331 Ref country code: BE Effective date: 19950331 |
|
BERE | Be: lapsed |
Owner name: HOHENLOHER SPULENKORPERFABRIK Effective date: 19950331 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19951001 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19950331 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19951130 |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 19951001 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19951201 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |