Plastic article or earthenware shaping or treating: apparatus – With apparatus assembly or dismantling means or with idle part – For extrusion or injection type shaping means
Patent
1997-02-07
1998-10-20
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
With apparatus assembly or dismantling means or with idle part
For extrusion or injection type shaping means
249102, 249103, 249104, 425192R, 425556, B29C 4540
Patent
active
058243500
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a mold for molding or injection-molding polymer compounds, having at least one mold ancillary unit, in particular an ejector device, preferably an ejector pin, and/or a core pin device.
When molding or injection-molding polymer compounds, the individual moldings need to be identified. Thus, in the field of plastics, it must as a rule always be stated on the molding which plastic material is involved. Moreover, it is often desirable to be able to identify the time of production of the particular molding from the molding itself.
DESCRIPTION OF THE PRIOR ART
It is known, for the purpose of identifying moldings molded from polymer compounds, to incorporate a marker stamp in the wall of, for example, an injection mold, which marker stamp applies the marking to the surface of the molding in a structured manner. The marking may comprise information concerning the material or the date, for example.
FR-A-2.644.610 discloses an apparatus for automatically numbering injection moldings. In this apparatus, a groove-like marking is applied to the appropriate injection molding via a mold ancillary part. At the same time, a marking which has a fixed position may be arranged in the region next to the mold ancillary part. in which an injector pin is arranged, which has a stamp element, in order to impress a certain imprint on the molded article. A similar direction is taken by the publication Patent Abstracts of Japan, Vol. 9, No. 322 which has an injector pin in the end region of which facing the polymer compound during the molding, a stamp is present which has letters, numbers or symbols.
SUMMARY OF THE INVENTION
The technical problem or the object on which the invention is based is furthermore to specify a mold ancillary device, specifically an ejector device or core pin device, for a mold for molding or injection-molding polymer compounds, which mold can be widely used, can be adapted to the particular installation configuration and ensures reliable marking.
The device according to the invention for a mold for molding or injection-molding polymer compounds is accordingly distinguished by the fact that marker unit can be fastened detachably to the mold ancillary device.
A particularly advantageous refinement is distinguished by the fact that the marker unit is designed as a date stamp. The same possibilities are provided with respect to the adjustment as in the known, separate date stamps.
It has proven beneficial to design the marker unit to be displaceable counter to the action of an elastic element, preferably a spring element.
A particularly preferred refinement is distinguished by the fact that the ejector device is designed as an ejector pin.
In a preferred refinement of the mold ancillary device according to the invention, the latter is present as an ejector pin having a first end second end region arranged opposite to the first end region, the first end region having the marker unit. As has already been described above, the marker unit may be designed as a date stamp, for example.
A particularly preferred refinement of the ejector device or core pin device according to the invention, which may also be used without a marker unit, is distinguished by the fact that a top plate can be fastened to the second end region with the aid of fastening means, the length of the receiving structure for the fastening means being selected to be greater than is required to ensure sufficient fastening. As a result of providing for a relatively great length of the receiving structure, it is no longer necessary, for different lengths, to provide ejector pins of different lengths. In fact, a sufficiently great length which will cover the common cases is selected, and an ejector pin of this kind is produced. If a relatively short ejector pin is required for installation, part of the ejector pin is simply cut off, while the still remaining receiving structure for the fastening means still has a great enough length for fastening the top plate to be possible without any p
REFERENCES:
patent: 4137962 (1979-02-01), Pol
patent: 4708314 (1987-11-01), Kuhling
patent: 5620716 (1997-04-01), Opitz
Kunststoffberater, vol. 28, No. 5, May 1983 Isernhagen De, p 14 'Fur Auswerferstifte und Hulsen in Formen'.
Abstract: JP,A,60 193347; Oct. 1, 1985; Japan.
Abstract: JP,A,60 1555423; Aug. 15, 1985; Japan.
Abstract: JP,A,57 027736; Feb. 15, 1982; Japan.
DME Normalien GmbH/Neuenstadt
Friskney Stephen H.
Heitbrink Tim
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