Plastic article or earthenware shaping or treating: apparatus – With apparatus assembly or dismantling means or with idle part – For press shaping surface
Patent
1990-05-10
1993-05-18
Hoag, Willard
Plastic article or earthenware shaping or treating: apparatus
With apparatus assembly or dismantling means or with idle part
For press shaping surface
100918, 425195, 425218, 4254501, 425451, 4254517, 4254519, B29C 4304
Patent
active
052119661
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to an insertable molding box to a mold table of a press, and the mold table and the insertable box are provided with laterally opposite guide arrangements, and lifting means are provided that hold the box against the downward-oriented adjusting surfaces on the mold table in the operating position.
DESCRIPTION OF THE PRIOR ART
A known device of the type mentioned according to DE-A-33 14 272 (laid open Dec. 15, 1983) exhibits, between the mold box and the legs of the U-shaped mold table, a guide element each provided with guide grooves on which the box lies by a lateral guide strip and which, in the operating position, holds the box against the upper adjusting surfaces of the guide grooves by the key inserted under it so that a mainly plane surface formed from several parts is produced laterally over the mold surface.
Because of several components and/or additional guide elements, this design causes considerable high construction and manufacturing costs. The wear occurring with the known design can be corrected only at great expense.
SUMMARY OF THE INVENTION
Thus the object of the invention is to provide a device of the type mentioned above that is distinguished by simplicity and that makes possible great latitude in size or a high degree of general-purpose application.
According to the invention, this object is achieved in that the surface of the box allocated to the mold feed opening and the adjusting surfaces provided on the mold table form a common plane.
This design principle makes possible, relative to the previous embodiments, a simplified way of arranging the mold table and box within a press and guarantees the use of various lifting and clamping means, for example hydraulic, pneumatic or mechanical hoists, keys, spindle drives, etc. to anchor the box in the mold table.
Especially on a block press for the production of molded parts of a free-flowing material (ceramic molding compound) that is fed by a mold filling slide bar to the mold cavity provided in the box, the construction principle according to the invention proves advantageous because the box-bordering contact surface of the filling slide bar can merge flush with the common plane formed by the mold table and box. The configuration and arrangement of these bulk parts can thus be considerably simplified and refinishing work due to mold wear can be reduced.
A special embodiment according to the basic design system on a press with a U-shaped mold table on whose inner sides of the legs there are provided opposite guide grooves that form a guide arrangement with the insertable box (mold block) and that receive the box by mold carriers on support surfaces, guide grooves that exhibit, between their one adjusting surface and the mold carrier, in each case a key that can be driven in to anchor the box, is distinguished in that the guide grooves are placed in the legs of the mold table and in that the surface of the box allocated to the mold feed opening and the other adjusting surfaces of the guide grooves form the common plane in the operating position of the box.
This yields considerable advantages in the manufacturing and application engineering of these unavoidable bulk parts, as well as advantages of an economic nature. Among other things, it becomes possible to take into consideration the guide grooves provided in the legs of the U-shaped mold table by recesses in the mold. Machining is considerably simplified and more cost-effective. The box is simplified without reducing its strength and the insertion is performed without any special problems; in this way, obstacles on the mold table can be reduced. The universality can be further improved by simplifying the box and the formerly used boxes can be used again on the uniform fastening mold with limited adaptations. The refinishing work on the adjusting surfaces is eliminated.
The abrasion phenomena that appear by the use of the box, mainly on its surface, because of the movement of the filling slide bar and that occasionally require a resurfaci
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Raudies Gerhard
Steinmann Walter
Bucher-Guyer AG Machinenfabrik
Hoag Willard
Jaskiewicz Edmund M.
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