DE1086042B - Process for the injection molding or pressing of thermoplastics, in which steel or metal parts or other solid bodies that are partially to be encased with plastic are placed in a mold - Google Patents
Process for the injection molding or pressing of thermoplastics, in which steel or metal parts or other solid bodies that are partially to be encased with plastic are placed in a moldInfo
- Publication number
- DE1086042B DE1086042B DEL26421A DEL0026421A DE1086042B DE 1086042 B DE1086042 B DE 1086042B DE L26421 A DEL26421 A DE L26421A DE L0026421 A DEL0026421 A DE L0026421A DE 1086042 B DE1086042 B DE 1086042B
- Authority
- DE
- Germany
- Prior art keywords
- mold
- injection molding
- plastic
- steel
- metal parts
- 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.)
- Pending
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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/0038—Moulds or cores; Details thereof or accessories therefor with sealing means or the like
- B29C33/0044—Moulds or cores; Details thereof or accessories therefor with sealing means or the like for sealing off parts of inserts projecting into the mould cavity
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
- B29C45/14418—Sealing means between mould and article
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- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14754—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles being in movable or releasable engagement with the coating, e.g. bearing assemblies
- B29C2045/1477—Removable inserts, e.g. the insert being peeled off after moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
Verfahren zum Spritzgießen oder Pressen von thermoplastischen Kunststoffen, bei dem teilweise mit Kunststoff zu umhüllende Stahl- oder Metallteile oder sonstige feste Körper in eine Form eingelegt werden Es ist allgemein bekannt, Stahl- und Metallteile mit thermoplastischen Kunststoffen im Spritzgießverfahren zu ummanteln, wobei die Kunststoffumhüllung nur einen Teil dieser Stahl- und Metallteile umgibt, z. B. bei der Herstellung von Schraubenzieher-, Feilen-und ähnlichen Werkzeugheften. Fernerhin ist dieses Verfahren bei der Herstellung von Zangen und Scheren bekannt, bei denen die Schenkel aus Stahl geschmiedet oder sonstwie hergestellt sind und nachträglich eine Umhüllung aus Kunststoff erhalten.Process for injection molding or pressing thermoplastics, in the case of steel or metal parts or other parts that are partially encased in plastic solid bodies to be inserted into a mold It is common knowledge of steel and Encasing metal parts with thermoplastics in the injection molding process, where the plastic casing surrounds only part of these steel and metal parts, z. B. in the production of screwdriver, file and similar tool handles. Furthermore, this method is known in the production of pliers and scissors, in which the legs are forged from steel or otherwise manufactured and subsequently received a plastic casing.
In allen diesen Fällen besteht die Notwendigkeit, den eingelegten Körper teilweise aus der Preß- bzw. In all of these cases there is a need to use the pickled Body partly from the press or
Spritzform herausragen zu lassen. Es hat sich dabei als schwierig erwiesen, an der Anlagestelle zwischen der Form und dem herausragenden Stahl- oder Metallteil eine genügend gute Dichtung zu erzielen, die dem Druck des beim Spritz- oder Preßverfahren flüssigen thermoplastischen Kunststoffes gewachsen ist. Auch bei einem noch so geringen Spiel an dieser tSbergangsstelle spritzt Kunststoffmasse aus der Form heraus, deren Beseitigung einen erheblichen Zeitaufwand erfordert und Fehler in der Formgebung der Kunststoffteile zur Folge haben kann. Insbesondere bei in eine Form einzulegenden Schmiedestücken ist daher eine besondere Bearbeitung desjenigen Teiles erforderlich, das die Form während des Spritz- oder Preßvorganges umfaßt.To let the injection mold protrude. It has proven to be difficult proven to be at the contact point between the form and the protruding steel or Metal part to achieve a sufficiently good seal that can withstand the pressure of the or molding process of liquid thermoplastic material has grown. Even With even the smallest amount of play at this transition point, plastic compound will be injected out of the form, the elimination of which requires a considerable expenditure of time and Errors in the shape of the plastic parts can result. In particular In the case of forgings to be inserted into a mold, special processing is therefore required that part is required that the mold during the injection or pressing process includes.
Um diese Schwierigkeiten zu vermeiden, wird gemäß der Erfindung vor dem Spritzgieß- oder Preßvorgang über das mit Kunststoff zu umhüllende Stahl-oder Metallteil oder auch jeden sonstigen festen Körper an der Übergangsstelle zwischen Formhohlraum und Formwand, dort also, wo die Form den festen Körper zur Abdichtung umfaßt, eine elastische Hülle gelegt. Diese Umhüllung wird zweckmäßig als Abschnitt eines elastischen Schlauches ausgebildet, wobei der Innendurchmesser etwas kleiner zu wählen ist als der Außendurchmesser des betreffenden Metallteiles. In order to avoid these difficulties, is proposed according to the invention the injection molding or pressing process over the steel or plastic to be encased Metal part or any other solid body at the transition point between Mold cavity and mold wall, i.e. where the mold meets the solid body for sealing includes, placed an elastic sheath. This wrapping is useful as a section an elastic hose, the inner diameter being slightly smaller is to be selected as the outer diameter of the metal part in question.
Das zuverlässige Haften dieser elastischen Umhüllung ist alsdann ohne weiteres gegeben.The reliable adhesion of this elastic covering is then without further given.
Bei der Anfertigung der Form muß darauf geachtet werden, daß diese an der Dichtungsstelle etwas größer ist als der Durchmesser des Stahl- oder Metallteiles, aber geringer als der Außendurchmesser der elastischen Umhüllung, damit ein Dichtungsdruck entsteht. When making the form, care must be taken that this at the sealing point is slightly larger than the diameter of the steel or metal part, but smaller than the outer diameter of the elastic envelope, so that a sealing pressure arises.
Der Durchmesser der zu umhüllenden festen Körper, die Wandstärke des Schlauches und die Öffnung in der Form müssen demnach so aufeinander abgestimmt sein, daß die Dichtung während des Spritz- oder Preßvorganges zuverlässig hergestellt ist.The diameter of the solid body to be enveloped, the wall thickness of the The hose and the opening in the mold must therefore be coordinated with one another be that the seal is reliably produced during the injection molding or pressing process is.
Nach dem Spritz- oder Preßvorgang kann der Dichtungsring entfernt werden, was durch Aufschlitzen und Abnehmen ohne große Mühe geschehen kann. Der Dichtungsring kann aber auch auf dem eingelegten Körper verbleiben, wodurch insbesondere durch unterschiedliche Farben ästhetische Wirkungen erzielt werden können. After the injection molding or pressing process, the sealing ring can be removed which can be done without much effort by slitting and removing. Of the Sealing ring can also be inserted on the Body remain, which in particular aesthetic effects can be achieved through different colors.
Zum Unterschied zu den im Maschinenbau gebräuchlichen Gehäuseabdichtungen, die als Teil einer Vorrichtung, eines Maschinenelementes od. dgl. das Heraustreten flüssiger Stoffe aus einem umgrenzten Raum verhindern sollen, handelt es sich bei der vorliegenden Erfindung um eine solche, die bei zunächst flüssigen und später verfestigten Massen Verwendung finden soll. Demgemäß findet die Dichtung nicht wie üblich als Teil einer Vorrichtung oder Einrichtung mehrfache Verwendung, sondern sie wird nach Abschluß des Spritz- oder Preßvorganges ein Teil des zu umhüllenden Gegenstandes. In contrast to the housing seals commonly used in mechanical engineering, as part of a device, a machine element or the like. The stepping out to prevent liquid substances from a confined space, it is with of the present invention to one that is initially liquid and later solidified masses should be used. Accordingly, the seal does not find how Commonly used as part of a device or facility, rather than multiple uses after completion of the injection or pressing process, it becomes part of the material to be wrapped Subject.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL26421A DE1086042B (en) | 1956-12-11 | 1956-12-11 | Process for the injection molding or pressing of thermoplastics, in which steel or metal parts or other solid bodies that are partially to be encased with plastic are placed in a mold |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL26421A DE1086042B (en) | 1956-12-11 | 1956-12-11 | Process for the injection molding or pressing of thermoplastics, in which steel or metal parts or other solid bodies that are partially to be encased with plastic are placed in a mold |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1086042B true DE1086042B (en) | 1960-07-28 |
Family
ID=7263787
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEL26421A Pending DE1086042B (en) | 1956-12-11 | 1956-12-11 | Process for the injection molding or pressing of thermoplastics, in which steel or metal parts or other solid bodies that are partially to be encased with plastic are placed in a mold |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1086042B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0146710A1 (en) * | 1983-12-21 | 1985-07-03 | VDO Adolf Schindling AG | Manufacturing process for a magnetic probe |
DE3425003A1 (en) * | 1984-07-06 | 1986-01-16 | Böllhoff & Co GmbH & Co KG, 4800 Bielefeld | COMPOSITE PART FROM PLASTIC MOUNTING PART AND THREADED BOLT |
WO2002076681A1 (en) * | 2001-03-28 | 2002-10-03 | Felo-Werkzeugfabrik Holland-Letz Gmbh | Plier- or clipper-like tool and method for application of grip sleeves made from plastic on the steel grip arms thereof |
EP1369209A2 (en) * | 2002-06-06 | 2003-12-10 | Proxxon S.A. | Tool handle |
-
1956
- 1956-12-11 DE DEL26421A patent/DE1086042B/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0146710A1 (en) * | 1983-12-21 | 1985-07-03 | VDO Adolf Schindling AG | Manufacturing process for a magnetic probe |
DE3425003A1 (en) * | 1984-07-06 | 1986-01-16 | Böllhoff & Co GmbH & Co KG, 4800 Bielefeld | COMPOSITE PART FROM PLASTIC MOUNTING PART AND THREADED BOLT |
WO2002076681A1 (en) * | 2001-03-28 | 2002-10-03 | Felo-Werkzeugfabrik Holland-Letz Gmbh | Plier- or clipper-like tool and method for application of grip sleeves made from plastic on the steel grip arms thereof |
EP1369209A2 (en) * | 2002-06-06 | 2003-12-10 | Proxxon S.A. | Tool handle |
EP1369209A3 (en) * | 2002-06-06 | 2005-06-22 | Proxxon S.A. | Tool handle |
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