Tools for producing shaped parts with contours

Details Tools for producing shaped parts with contours Tools for producing shaped parts with contours

1998-05-26

2001-11-20

Nguyen, Nam (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Sets of male-female press molds

C425S398000, C425S405100, C425S412000, C425SDIG005, C425SDIG001

Reexamination Certificate

active

06318988

ABSTRACT:

BACKGROUND OF THE INVENTION
Field of the Invention
The invention relates to a tool for producing shaped parts with contours. The tool includes a female die and an associated male die in-between which a deformable material can be placed. The female die and the male die are disposed so as to be movable individually or jointly toward one another.
Tools of this generic type are known and are used in manifold ways. In the production of shaped parts with relatively complex contours, certain difficulties arise, especially when materials with poor expansion capability are used. For example, when one joins a reinforcement layer (backing) formed of annual plants or fibers to increase the strength or to attain a bonding action with a decorative material, the expandability of the decorative material must not be exceeded or else tearing of the decorative material will ensue during the joining process.
SUMMARY OF THE INVENTION
It is accordingly an object of the invention to provide a tool for producing shaped parts with contours which overcomes the above-mentioned disadvantages of the prior art devices and methods of this general type, and which is used for forming shaped parts having complex contours without destroying the fabric, even if materials with poor expandability are used and/or if decorative material for a composite design is used.
With the foregoing and other objects in view there is provided, in accordance with the invention, a tool for producing shaped parts having contours, including: a female die having an antechamber region, an inlet region and one of a contour and an undercut, the antechamber extends between the inlet region and one of the contour and the undercut; and a male die disposed relative to the female die for producing a shaped part from a deformable material placed between the male die and the female die, the male die and the female die being movable relative to each other.
In accordance with an added feature of the invention, the male die and the female die are disposed to be movable jointly toward one another.
In accordance with an additional feature of the invention, the female die has an end face and the antechamber region is bounded on one side perpendicular to the end face.
In accordance with another feature of the invention, there is a retaining device disposed in the antechamber region for securing a decorative material.
In accordance with a further added feature of the invention, the retaining device is at least one pin.
In accordance with a further additional feature of the invention, the retaining device is disposed on a part of the antechamber region that points toward the end face of the female die.
In accordance with yet another feature of the invention, there is a compulsory guide and the retaining device is guided in the compulsory guide.
In accordance with yet another added feature of the invention, the compulsory guide extends entirely over the antechamber region.
In accordance with yet another additional feature of the invention, the compulsory guide is a longitudinally extending groove.
In accordance with yet another feature of the invention, the retaining device is friction lockingly guided in the compulsory guide for forming a friction lock.
In accordance with an added feature of the invention, a force required to overcome the friction lock is less than a force required to tear the decorative material
In accordance with an additional feature of the invention, there is a compression spring disposed in the longitudinally extending groove.
In accordance with another feature of the invention, the antechamber region extends in a recessed fashion relative to the inlet region.
In accordance with yet another further added feature of the invention, the male die has a pressure face which extends in a protruding fashion corresponding to a shape of the antechamber region.
In accordance with yet another further additional feature of the invention, the pressure face is configured for being driven into the antechamber region.
In accordance with yet another feature of the invention, the pressure face has a first edge and the antechamber region has a complementary first edge, and a forced squish edge is produced between the first edge and the complementary first edge for fixation of the deformable material.
In accordance with an added feature of the invention, the first squish edge produces at least one of a pressure-proof and vacuum-proof tool cavity in the deformable material.
In accordance with an additional feature of the invention, the antechamber region has a second edge and a second squish edge can be produced at the second edge by driving the pressure face inward toward the female die.
In accordance with a concomitant feature of the invention, there are interchangeable inserts for varying a configuration of the first squish edge and the second squish edge, the interchangeable inserts can be disposed on at least one of the female die and the male die.
For adaptation to the various given conditions of the material, the antechamber region is variable in size. The antechamber region serves as a reservoir for material. A first squish edge allows the recessing or bending of the shaped part, and at the same time extra material (decorative material and/or other material) can flow out of the antechamber region to prevent the tearing of the material.
Other features which are considered as characteristic for the invention are set forth in the appended claims.
Although the invention is illustrated and described herein as embodied in a tool for producing shaped parts with contours, it is nevertheless not intended to be limited to the details shown, since various modifications and structural changes may be made therein without departing from the spirit of the invention and within the scope and range of equivalents of the claims.
The construction and method of operation of the invention, however, together with additional objects and advantages thereof will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.


REFERENCES:
patent: 4239727 (1980-12-01), Myers et al.
patent: 4252518 (1981-02-01), Kiefer
patent: 5032106 (1991-07-01), Warburton
patent: 5295804 (1994-03-01), Dinnan
patent: 5307610 (1994-05-01), Schneider et al.
patent: 5378416 (1995-01-01), Kishis et al.
patent: 5683648 (1997-11-01), Fortin
patent: 2080721 (1980-07-01), None

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