KR20010023857A - Automatic cutting and stacking device for shaped blanks and method of use - Google Patents

Abstract

An automatic cutting and stacking device for arcuately shaped blanks is disclosed. The device contains a feeding table (1) followed by a cutting unit (2) and a stacking device. The cutting unit (2) is movable in relation to the feeding table (1) to thus allow a cutting perpendicular to the contour of the shaped film. The stacking unit comprises a slide plate (31) and a movable base plate (3) upon which the cut blanks are stacked. The height of the base plate (3) can be adjusted/lowered in relation to the accumulating thickness of the stacking height of the cut blanks. <IMAGE>

Description

AUTOMATIC CUTTING AND STACKING DEVICE FOR SHAPED BLANKS AND METHOD OF USE}

The present invention relates to an automatic cutting and stacking device of a cut shaped blank and a method of using the same. This device is well suited for the fabrication and handling of cut-shaped interlayer blanks. The apparatus of the present invention comprises: a feeding device which generally represents a surface for precisely feeding the film to the cutting unit along a fixed arc under a fixed angle; A cutting unit for cutting the straight film past its circular contour; And a loading system for loading the blank in its cut position in a single planar motion.

Cut-shaped blanks are used for automotive windshields, in particular for car glass having a tinted band along the upper side. To this end, the original straight web, such as a polyvinyl butyral interlayer, for example, is stretched into a curved web so as to conform to the shape of the tea glass. This curved web is subsequently cut into blanks of the appropriate cut form, which can be used as an interlayer between two glass plates for the production of laminated glass windows of a car. The cutting and loading of such blanks is generally performed by hand, mainly due to the non-linear shape of the blanks when the opposite cutting planes are generally straight and not parallel while the two opposite sides are circular.

Prior art, including the industrial application, for the production of formed blanks is well-established and known to have marginal profitability. Due to the problems related to the nonlinear form of the blanks, cutting and / or loading of the blanks is done in whole or in part by hand. Past efforts to automate the cutting and / or loading of blanks have required expense for the equipment, so that a series of individual machines were sequentially installed for the following operations: supply work; Cutting work; Moving operation of the cut blank; Loading of cut blanks. Such known work tools are capital intensive, require a large amount of clean and floor space, and the help of the operator, and must suffer from the need to substantially change the model.

Therefore, the 1st object of this invention is to enable the apparatus which can automatically cut the arc-shaped film, and load the cut blank. It is a further object of the present invention to provide a device capable of cutting and stacking circular shaped cutting blanks, continuously, automatically and substantially by hand. Another object of the present invention is to make a method for the continuous manufacture and automatic loading of blanks in cut shape. The above and other objects of the present invention can be achieved by a machine comprising: a feeding table; Cutting device; Indexing table.

The present invention relates to an automatic cutting and stacking device for circular arc shaped blanks, including:

(a) a feed table capable of feeding a film of arc shape of a predetermined length to a cutting device;

(b) an apparatus for cutting the formed film into blanks; And

(c) a loading device comprising an index table to which a slide plate and a base plate are attached.

The feeding device, in a preferred embodiment, is operated by a feeding wheel 12, which drives a certain length of film into the cutting device. The cutting device 2 can be represented by a fixed bed knife 21 coupled with a rotating knife 22. The angle between the bed knife and the centerline of the feed wheel can be adjusted, resulting in a vertical cut at any selected radius. The index table 33 provided with the base plate 3 is lowered in such a manner as to synchronize with the operation of the cutting device, in increments corresponding substantially to the thickness of the blank of the cut shape. The base plate supporting the formed layer of cut blank can be rolled in an index table, making it suitable for operation for any application and / or treatment.

In describing the present invention, reference is made to the accompanying drawings in which:

1 is a plan view showing an automatic cutting and stacking device according to the present invention;

2A, 2B, 2C, 2D, 2E and 2F are cross-sectional views of the present invention relating to the operating sequence of the cutting and stacking device. 2a shows the starting position of the empty base plate 3. 2b shows the first cutting blank 41. 2c shows the slide plate 31 and the layer of cut blanks loaded on the base plate. 2d shows the movement of the base plate with the layer of the cut blank. 2E shows the layer on the base plate after being moved on the slide plate. 2F shows the automatic loading device after the movement of the base plate for conveying the layer of cut blank.

The invention is described and described with particular reference to the drawings. The feeding table 1 of FIG. 1 is equipped with a system for positioning the advancing front end of the formed film into the cutting device so as to cut into blanks of the desired size. The feeding wheel 12 propels the fixed length film along the guide 11 into the cutting device. A pressure roller 13 presses the formed film against the feed wheel 12 to prevent slippage that can change the fixed angle of the blank. Separate guides are used for each diameter.

The cutting device 2 can be represented by any type of cutting device that is generally known to be suitable for automatic cutting of plastic films. The cutting device generally comprises a fixed bed knife and a knife such as, for example, a guillotine knife or preferably a rotary knife, which works along the bed knife to perform a kind of scissors cut. In one preferred embodiment, a fixed bed knife 21 combined with a traversing rotary knife 22 may be used. The position, in particular the rotational position, of the cutting device, including the fixed bed knife and the counter knife, can be adjusted independently or in relation to the feed table by means of a suitable device which can normally be used, such as a vertical axis. have. The angle between the bedknife and the centerline of the feed wheel can be adjusted as a result, making it possible to cut perpendicular to all radii. In a preferred adjustment of the cutting unit, the angle is from 0 ° to about 18 ° for the formed film having a radius between 1 and 8 meters. In other words, the cutting angle is an angle that causes cutting perpendicular to the end of the contoured film. The feed wheel 12 is located as close as possible to the bed knife, ie the exit boundary of the feed table 1.

The blank is placed on the base plate 3 as it is cut out of the shape film. More specifically, the shape film is moved through the sliding plate 31 to the base plate 3 through the cutting device until the length selected to be cut is reached. The cutting separates the blank from the forming film. The cut blank is superimposed on the base plate 3. In order to adjust the height of the cut blank so as not to interfere with the coming blank, the index table 33 is lowered in a manner synchronized with the operation of the cutting device. Index increments substantially correspond to the thickness of the film in cut form. The increment may correspond to the thickness of the blank of one or more cut shapes. It has been found that individual index increments corresponding to two to ten times the thickness of the blank of the cut shape are preferred.

The slide plate 31 works to overcome the height difference between the bed knife 21 and the base plate 3. The slide plate 31 is continuously attached to the index table 33. A roller 32 is mounted on top of the index table 33 to facilitate the adjustment of the base plate 3, in particular the base plate 3, on which the cut blank is loaded. While moving the base plate 3 with the blank, a small portion of the blank lying on the slide plate forms a rectangular layer of the blank after leaving the slide plate 31, following the movement of the base plate 3.

The base plate 3 for moving the layer of cutting blank can be used on the plywood line, or other applications are possible.

The preferred feed table can be represented by the treatment table according to European patent application EP-A-97870135.7, filed September 12,1997. Shaped films that can be processed with automatic cutting and stacking devices can be preferably represented by plasticized polyvinyl butyral interlayer films. Such films can be formed by known fabrication techniques, most preferably by the dual umbrella shaper technique described in EP-A-0.685.316.

Claims (6)

As an automatic cutting and stacking device of arc-shaped blanks: (a) a feeding table for feeding the arc-shaped film of fixed length to the cutting device; (b) a cutting device for cutting the formed film into blanks; (c) Automatic cutting and stacking device for arc-shaped blanks, including a stacking device including an index table having an attached slide plate and a base plate. The fixed bed according to claim 1, wherein a feeding wheel (12) and a pressure roller (13) are installed on the feeding table (1), and the cutting unit (2) is coupled with the transverse rotating knife (22) Automatic cutting and stacking device of arc-shaped blank, characterized in that it comprises a bed knife (21). 3. An automatic cutting and stacking device according to claim 2, characterized in that the feed table is further provided with a guide (11). 3. Automatic cutting and stacking device according to claim 2, characterized in that the cutting unit (2) can be adjusted independently with respect to the feed table in the region represented by 0 ° to 18 °. 2. The circular arc-shaped blank of claim 1, wherein the index table can be lowered in a manner that is synchronized to the cutting operation by indexing increments corresponding to two to ten times the cut shape blank. Automatic cutting and loading device. A method of using the automatic cutting and stacking device according to any one of claims 1 to 5 for the production of cut formed blanks in formed plasticized polyvinyl butyral films.