Plastic article or earthenware shaping or treating: apparatus – With apparatus assembly or dismantling means or with idle part – Means permitting removal or substitution of elements during...
Patent
1984-02-22
1985-11-26
Kratz, Peter
Plastic article or earthenware shaping or treating: apparatus
With apparatus assembly or dismantling means or with idle part
Means permitting removal or substitution of elements during...
425186, 425190, 425192R, 425575, B29F 100
Patent
active
045552282
DESCRIPTION:
BRIEF SUMMARY
FIELD OF ART
The present invention relates to an apparatus for automatically exchanging die for injection molding and, more particularly, to an automatic die exchanging apparatus for injection molding capable of automatically performing quick attaching and detaching of the die to and from an injection molding machine.
BACKGROUND ART
The current diversification of molded articles has caused a tendency of large-lot small-quantity production by a single injection molding machine, which in turn gives rise to the demand for frequent exchange of dies. Consequently, the length of the time called preparation time, required for the die exchange, is increased in relation to the molding time to cause various problems such as reduced rate of operation of the molding machine, increased number of workers, and so forth.
It is, therefore, important in the development of the molding machine to minimize the die exchanging time and to automate the die exchanging operation as much as possible. Although some measures have been developed to this end, these measures are to automate only a part of the die exchanging process.
DISCLOSURE OF THE INVENTION
Under this circumstance, the present invention aims at providing a full automatic apparatus which can perform quickly the die exchanging process including feeding of the die to the injection molding machine, centering of the die, and clamping of the die, without requiring by human labour.
To this end, according to the invention, there is provided an automatic die exchanging apparatus for automatically exchanging split die on an injection molding machine, the split die having a locking mechanism adapted to automatically lock the preset die half parts, the injection molding machine having a die mounting portion between a stationary platen and a movable platen and accessible by the locked split die from a lateral side of the injection molding machine, the automatic die exchanging apparatus comprising: a die exchanging base having at least two transfer passages adapted to carry a locked die, the die exchanging base being movable to alternatingly bring the transfer passages into alignment with the die mounting portion at one side of the molding machine; a transfer means for transferring the locked die from the aligned transfer passage to the die mounting portion and vice versa; a locating means for locating the die transferred to the die mounting portion at a predetermined position; a clamping means for fixing the die half parts of the located die to the stationary platen and the movable platen of the molding machine; and means for maintaining the locking mechanism of the dies in unlocking state during the operation of the molding machine.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic plan view of an embodiment of the apparatus in accordance with the invention;
FIG. 2 is a schematic front elevational view as viewed in the direction of line II--II of FIG. 1;
FIG. 3 is a schematic side elevational view of the embodiment shown in FIG. 1;
FIG. 4 is a plan view of an example of a split die with a locking mechanism as used in the apparatus of the invention;
FIG. 5 is a side elevational view of the split die;
FIG. 6 is a side elevational view of the split die attached to a molding machine, with its locking mechanism in the unlocking state;
FIG. 7 is a side elevational view of an automatic means for automatically connecting pipe and wirings to the split die mounted on the molding machine, wherein the left half part of the Figure shows connection terminals attached to the die except the movable part of the connecting means;
FIG. 8 is a partial plan view of the automatic connecting means shown in FIG. 7 for connecting pipe and wiring to the split die, wherein the right half part of the Figure shows the movable part with the connecting terminals omitted therefrom; and
FIG. 9 is a partial front elevational view of the automatic pipe and wiring connecting means as viewed in the direction of the line IX--IX of FIG. 7.
THE BEST MODE FOR CARRYING OUT THE INVENTION
FIGS. 1, 2 and
REFERENCES:
patent: 4005964 (1977-02-01), Bishop
patent: 4152978 (1979-05-01), Abe et al.
patent: 4174939 (1979-11-01), Fenner
patent: 4348165 (1982-09-01), Vostrovsky
Kumamura Masaaki
Miura Yasushi
Nishiike Naritoshi
Nishimaki Takashi
Fortenberry J.
Kratz Peter
Sumitomo Heavy Industrie's, Ltd.
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