DE2040002A1 - Method and device for punching stack material - Google Patents

Description

"Method and device for punching stack material"

The invention is generally concerned with new and useful ones Improvements in the punching of stack materials and creasing, in particular a new method and a new device for punching stacked textile layers in such a way that the punched out edges of the material do not touch the punching knives stick.

The use of panel presses for punching out multiple layers of textiles is known when converting businesses such as clothing factories.

Such presses generally have a power driven _t 3enkrecht reciprocating plate or sheet. The punches 3ind are arranged in groups and are located above the

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Pile of fabric on a workpiece holder, and the press is brought into position over it for punching.

A slightly compressible pad covers the tips of the die sets to offset the stress caused by any unevenness in the surface as the die pressure is transmitted through the board. After the end of the punching process in one station, the press is moved to the next station and the knife groups in the first station are lifted from the cut material by hand, which includes removing the punched pieces from the individual punching dies.

The press boards or press plates are provided with devices to raise the knife groups when returning the sheet or plate.

Regardless of the way in which the punching knives are lifted after completion of the punching process, it has been observed that that there is a talked-out tendency of the punched out There are corners of the fabric to stick to the punches, making it difficult to get the material in regular piles hold and release the punching knife in preparation for the next punching process.

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The invention overcomes this difficulty.

According to the invention, it was found that "when vibrating The punching knife of a sheet press parallel to the cutting direction when the sheet is withdrawn after a punching process has been completed the cut edges of the textile material separate smoothly from the punching knives and these automatically be completely cleaned.

It was further found according to the invention that a more effective Punching can be brought about when the knives are parallel to the cutting direction during both movements of the panel are set in vibration, and that in this case punching knives with round instead of sharp edges are used which eliminates the difficulty of always keeping the die cutter blades sharp.

Accordingly, it is an object of this invention to provide a panel press for punching stacks of fabric which has a support surface i for the workpieces, one that can be reciprocated vertically

i board on which the punching knives are held magnetically, ! and have a facility to make the punches in the direction of the • Cut at least during the retraction movement of the board '' to vibrate after executing the punching stroke.

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Another object of this invention is to provide a tablet press of the called type to create in the AC magnets are used to vibrate the punch knife.

Yet another object of the invention is to provide a tablet press
^^ of the type mentioned to create, with v / elcher the cutting edges of the punching knives are round.

For these and other purposes that make sense is
the invention will be better understood by reference to the drawings, the detailed description and the appended claims.

In the drawing is:

Fig. 1: a schematic front view of a unit

from an oil press and a workpiece carrier, which is constructed according to the invention,

Fig. 2: a horizontal section along line 2-2

of Fig. 1,
3: an enlarged vertical section through a

typical chisel! "grainy punching knife and
FIG. 4: a view similar to FIG. 3i but with i / ieder-

■; abe one>) l;?> Nzmosacrs with rounded cutting edge

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of the particular kind that can be used with this invention.

In the drawing, the invention is in detail in one Embodiment embodied in a punching device, which has an elongated, horizontal workpiece carrier 5, which different thickness textile stack 6 carries, from the lleiderteile should be punched out.

A tablet press, generally designated 7, is above the ßoffstapel 6 arranged and has an upper horizontal frame part 8, which is removable on several double-acting Air or hydraulic cylinders 9 are seated, which have pistons 1o and piston rods 11 extending downwards.

A heavy duty bolenoid 12 with a downward protruding one Armature 13 is attached to the end of each piston rod 11 and has a variable frequency power source 14 tied together.

The magnetic plate 15 is attached to the armature 13 and carries a number of steel punches 16 shaped according to the outline of the various pieces of clothing to be cut out.

Usually the punch knives 16 became a chisel edge

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with an inclination of about 7 ° -11 °, like FIG. 3 the drawing indicates.

However, it has been found that "when using the erfinj according to the device punching knives with the same slope, but with a rounded edge, are very effective as them

"ig. 4- of the drawing reproduces.

When in operation the plate 15 from the cylinders 9 downwards is printed for a punch stroke, the power source is switched on, to energize the solenoids 12 and the inker 13 to swing back and forth vertically around the plate

I or Tafel and the punching knives they hold a vertical To vibrate.

; The amplitude and frequency of this vibration are used to achieve a highly effective punch cut with a clean separation of punched material and the punching knives.

The vibration of the board and the punching knife is continued on the upward return stroke of the board to a to ensure that the cutting knife is lifted cleanly from the cut material.

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Claims (1)

Claims: ■ ή β) A method of punching of staple material, especially textile material, characterized in that the holding device ₉ for the punch blades in punch stroke reciprocating (vibrating) motion is imparted " Method according to Claim 1, characterized in that v-j denotes ,, that the holding device for the punch knife the reciprocating (vibrating) movement is also given during the return stroke willo ' ο A device for practicing the method according to claims 1 and 2, characterized in that it has a horizontal frame part (8), a horizontal board or plate (1 ^) arranged below the frame part, ₅ a device for detachably holding the punching knife ( 16) "a device (9, Ίο) attached between the frame part (8) and the panel (15) and operatively connected to it for guiding the panel back and forth during the punching and return stroke and a device (12, 13 ) has to vibrate the board (15) when moving it back and forth » Device according to claim 3 »characterized in that the means for vibrating the board (15) is an alternating uroma solenoid (12) connected between the board (15) and the device for going back and forth (9, 1o) i.er 10980 9/027 0 ' Blackboard sits. Device according to claim 3-4 for simultaneous ötanzcn of fabric into pieces of chosen shape and shape e size, characterized by a lower workpiece carrier (5) for holding webbing staples (6), a number for dance parts to be magnetized (16), a top panel or plate (15) including one -ilektroaia ^ eten of sufficient strength to the number of Jtanzaossern (16) to hold, means (1o, 11) for move back and forth the upper plate (15) with the attached firmly Teualtenen «Jtans & eo for the punching and return stroke and Means (12, 1J) to »Vibrate the punches (16) when punching during the otanzhubes and for cleaning from cen punched fabric parts during the return stroke. Apparatus according to claims 3-5, characterized in that the means for vibrating is an alternating current bolenoid (12) placed between the panel. (15) and cer üin- and Herfuhreinrichtung (9 _t ^ ⁰ ) is arranged. 109809/0270