Plastic article or earthenware shaping or treating: apparatus – Female mold and means to shape parison directly by internal... – Including means to prepare parison
Patent
1993-09-29
1996-03-26
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
Female mold and means to shape parison directly by internal...
Including means to prepare parison
425534, 425538, B29C 4906
Patent
active
055015913
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to blow molding machine which includes two calibration stations with an extruder arranged therebetween for producing hose-shaped parisons in an alternating sequence and in a periodical sequence at calibration stations, with produced hollow bodies being transported to at least one further processing or work station for processing and with a discharge for the processed hollow bodies.
BACKGROUND OF THE INVENTION
In, for example, DE-3925859-A1, a blow molding machine is proposed which comprises two calibration stations and an extruder arranged therebetween, with the extruder being adapted to produce hose-shaped parisons adapted to be taken up by mold forms in an alternating sequence in the mold forms and in a periodical sequence at the calibration stations. The calibration stations and the extruder are arranged along a vertical longitudinal center plane along which the mold forms, representing the objects to be loaded with the plastic parisons, are displaceable back and forth between their associated calibration stations and the extruder. At least one post-processing station at which the blow hollow bodies are subjected to a post-processing is provided, and a transport device transports the hollow bodies blown at the calibration stations to the post-processing station in sequence as timed by the blow cycles. The transport device is constructed as a transport-mask which is alternatingly moveable into acceptance position for accepting the molded hollow bodies and, from these acceptance positions, are transportable to the post-processing station. The transport mask is constructed in the manner of a blow mold half as a half mask having at least one hollow body acceptance aperture or opening within which a hollow molded body introduced therein is vertically supported and secured to prevent falling out from the transport mask by fully formed engagement of the contour of the aperture or opening with protrusions of form reductions of the hollow molded body.
In a blow molding machine of the aforementioned type, in order to be capable of delivering hollow molded bodies blown at the two calibration stations to any post-processing stations subsequently arranged along a transport plane, a swinging gripper is provided which, in periodical sequence, pivots from one calibration station to the first post-processing station, from the first post-processing station to the other calibration station and again back to the first post-processing station, etc. thereby, in each case, delivering the hollow blow bodies to the post-processing station from which further transport of the post process hollow blown bodies occurs along a transport plane which is extended at right angles to the vertical central plane of the basic machine defined by the arrangement of the calibration stations and the extruder.
SUMMARY OF THE INVENTION
The aim underlying the present invention resides in providing a blow molding machine of the aforementioned type which avoids inherent disadvantages to the conventional blow molding machine which requires each of the two calibration stations to include an individual set of post-processing stations.
By virtue of the features of the present invention, a noticeable improvement over the conventional blow molding machines is achieved since complicated transport devices for bringing the hollow blown bodies produced at the two calibration stations are eliminated and it is only necessary to provide one set of post-processing stations. Consequently, space requirements for accommodating the individual sets of post-processing stations is reduced. Moreover, the necessary technical efforts to realize the machine are reduced. In this connection, conventional blow molding machines of the type described above employing the swing gripper requires a considerable technical effort, and, in view of the arrangement of the post-processing stations and of the swinging gripper with respect to one another, time consuming adjustments are required which also complicate a set up of the
REFERENCES:
patent: 3480994 (1969-12-01), Moslo
patent: 3767342 (1973-10-01), Potter et al.
patent: 3794454 (1974-02-01), Higginbotham et al.
patent: 4124668 (1978-11-01), Frohn
patent: 4290995 (1981-09-01), Oas
patent: 4459095 (1984-07-01), Rohr et al.
patent: 4552526 (1985-11-01), Hafele
Heitbrink Tim
R. Stahl Blasformtechnik GmbH
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