KR101415013B1 - Method for applique of flat pieces of material and, cutting device and embroidery machine for realizing the same - Google Patents

Abstract

The method involves arranging at least one material layer (73) over the embroidery base (75) and producing a controlled relative movement between the cutter (15) and the material layer to cut a flat piece of material of the desired shape out of the material layer. The cutter is controlled by the control program of the embroidery machine to be brought into a cutting position and is returned to the initial position after carrying out the cutting procedure : Independent claims are also included for the following: (A) a cutting device for an embroidery machine (B) and an embroidery machine.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for applizing a flat material piece, a cutting device and an embroidery machine for carrying out the method,

The present invention relates to a method for applying a desired piece of flat material to a stitch base using an embroidery machine. The present invention also relates to a cutting apparatus and an embroidery machine for carrying out the above method.

An embroidery machine is a machine that forms a needle stitch according to "embroidery technique" (Schoener / Fricker, Leipzig, 1982, page 18/20) You can change it freely within. This enables the formation of decorative patterns. However, a few years ago an embroidery machine was used to form a pattern with a technical function, for example a conductor. Most embroidery machines used today work according to a two-room system, and the formation of stitch patterns on a stitch base is done in a program-controlled manner. It is practically divided into large and small embroidery machines. As for the large embroidery machine, the North embroidery machine was most widely used. In the north embroidery, the needles are arranged in a line. In particular, flat embroidery machines manufactured by Pfaff are less popular, in which the needles are distributed throughout the stitch field. According to Schoener / Freier, page 100, the flat embroiderers are used to manufacture a wide range of products such as tablecloths, curtains, embroidery-quilted products and the like. Also, the so-called quilting machine is a large embroidery machine from a technical point of view. The quilting machine works likewise in the drum, but includes only a row of needles, unlike a flat embroidery machine which can produce embroidery-quilting products. As a small embroidery machine, in particular, a single head-stitch automatic machine and a multiple head-stitch automatic machine are known.

"Applique" as used herein is defined as any material or piece of material, a piece of fabric cut in a narrow sense and a fabric pattern, or a pattern made of leather, paper, felt and other similar materials . That is, "applique work is an operation that utilizes a variety of differently-fabricated fabrics that have been cut or cut in certain parts for patterning before or after patterning in the embroidery industry. The fabric to be applicated - If it should be distinguished in relation to its color or weave, it should look different from material to material, or vice versa, such as matte and glossy. " Schoener / Freier categorizes the applique into two types: one to stitch the already cut shape portion as a design, and the other to stitch two or more stitched fabrics together, where the portions are cut after the stitch or stitch.

Schoener / Freier, page 312, states that the number of connections between two fabrics can be implemented in a variety of ways. Therefore, it is possible to cut the fabric and stitch the edges once again after stitching the outline of the pattern with the quilting. That is, the fabric must be cut carefully in all operations, either hand embroidery or machine embroidery. For this purpose, fine embroidery scissors with a wider blade down are used. Cutting down to a peak may risk cutting into the stitch base. DE 44 26 817, published in 1995, describes a stitching method in which a frame of two material layers is moved according to the cut shape from the upper layer of material. The upper material layer is cut by a laser beam. Subsequently, the needle rod is moved during the stitching process and the embroidery is completed along the cutting edge. US 5 915 316, which is based on the priority of 1995, discloses multiple head-embroidery machines with laser heads for the formation of appliques. DE 10 2005 050 482 also discloses a north embroidery machine with a laser cutting head which can be positioned longitudinally through a spindle driver on the front side of the machine. Laser cutting has great disadvantages. This is because laser devices are very expensive. In general, this precludes the possibility of placing a plurality of such devices on one machine. In addition, the laser device has a drawback that it takes a lot of space around the machine and protective measures for eye protection. Nonetheless, the laser cutting is adhered to so far.

Unpublished European Patent 07 405 210 discloses a support extending over the length of an embroidery machine, in which a device for stitching a sequin, a device for stitching a lace and a device for applicating a flat piece of material are arranged. In addition, the operating organ is extended over the length of the embroidery machine to operate a device for stitching sequins or races.

The apparatus for appliqué includes a peak that can be heated as a cutting device, and the peak can be moved to a cutting position by an actuator, such as a pneumatic cylinder, and then back to the rest position. The device is relatively costly in manufacture and can be used with relatively expensive structures required for a device that stitches sequins or lace, extending over the length of an embroidery machine.

It is an object of the present invention to make it possible to apply a piece of flat material in the form of a pattern made of, for example, a fabric material or other suitable material, to a stitch base using an embroidery machine and to provide additional support and operating engines for the embroidery machine, And to provide a method and an apparatus which do not need to open a structure.

This object is achieved by the method according to claim 1 according to the invention.

The above method has the advantage that the embroidery machine is not structurally deformed. No special supports and actuating mechanisms are required. Rather, it is sufficient to replace the perforator of the perforator with the appropriate perforator at the desired location, and the perforator is operated by the program of the embroidery machine to move the cutting device to the cutting position for cutting of the piece of material during operation of the embroidery machine . Also, to cut a piece of planar material, a relative motion between the cutting device and the material layer is made by the program.

Basically, a laser or a mechanical cutting tool is used as the cutting device. However, in the embroidery machine a generally narrow space is provided for the perforation device, which makes the use of the tool difficult. Thus, preferably cutting of the material pieces is carried out by a heated peak.

After long experiments and test runs, it has been found that cutting of the material layer can be reliably effected by peaks that can be heated. This has proven to be unfounded that the stitch base below the material layer is damaged by heat. However, it is presupposed that appropriate material selection, appropriate forward travel speed, and appropriate temperature of the peak that can be heated. The experience value for this can be determined by test execution. It has proved desirable to use natural fiber fabrics as the stitch base and synthetic fiber fabrics as the material layers. The cutting at the time of heating the peak to be heated and the suitable forward movement speed is achieved by melting the synthetic fibers.

If the stitch base is relatively heat sensitive, it is preferable to insert the interlayer for heat insulation between the stitch base and the material layer, and the interlayer may be dissolved by the solvent. After the end of stitching and appliquing, the interlayer may be removed by insertion into a solvent bath.

A fabric may be used as the intermediate layer. An intermediate layer containing a heat reflective coating is particularly suitable for heat sensitive stitch bases.

The invention is not limited to appliques of fabric pieces. Other materials such as synthetic fiber sheets or nonwoven fabrics are also suitable.

The present invention also relates to a cutting apparatus for an embroidery machine equipped with at least one punching device for cutting a flat material piece of a desired shape from a material layer disposed on a stitch base using an embroidery machine. According to the invention, the cutting device features fixing means for fixing the cutting device to the punching device. To this end, the cutting device may comprise a support with a securing section, the securing section being formed identically to the securing section of the perforator of the perforator. In this way, it is sufficient to replace the perforator with a cutting device at the stitch position for cutting when the embroidery machine for appliqué work has to be opened.

In a preferred embodiment of the cutting device, the securing section has a bore for insertion of the centering peg of the perforation device and a notch for locking by means of the securing device of the perforation device. In another embodiment of the cutting device, the support comprises a bayonet connection, which is connected to a corresponding bayonet connection of the punching device.

A preferred embodiment of the cutting device comprises a peak that can be heated. The advantages of the peaks that can be heated have been described above. The peak that can be heated can also be formed as a perforator. This has the advantage that the peaks that can be heated can be used not only for cutting but also for drilling. Preferably an electric heating cartridge is used to heat the peaks. Preferably the peaks are interchangeably arranged in the heating cartridge.

It has proven particularly advantageous to place the spacer in a peak that can be heated. The spacers are pressed against the fabric layer in the working position of the cutting tool and ensure that the peaks can be inserted only into the layer of material to be cut, not into the stitch base. Preferably, the spacers can be adjusted to determine the depth at which the heatable peaks are to be inserted into the material layer. The spacer can be fixed to the fixing part with a screw. However, in order to enable rapid separation, the spacers may be disposed only so as to be insertable into the fixing portion. This may be desirable if a peak that can be heated is used in cutting as well as in punching. The spacers must be separated to allow perforation.

In another embodiment of the cutting device, the peak has an electrical resistance heating portion in the cutting area. Preferably, the peak has a wire portion in a tube made of a ceramic material, and the front and the outside of the wire portion are surrounded by a metal layer used as an electric resistance heating portion in the cutting region.

The invention also relates to an embroidery machine comprising at least one cutting device according to claims 7 to 19.

Embodiments of the present invention are described with reference to the drawings.

As described in Schoener / Freier's cited publication 72 pages below, perforators have long been used in embroidery to form holes with edges that are later stitched back to the fabric. The perforators are rectangular steel peaks with sharp cutting edges that cut the texture yarns upon insertion.

The perforators can be arranged in the perforator guide in various patterns, and the perforator guide can be moved towards the stitch base in a controlled manner by an embroidery program for perforation. In the case of a color changeable embroidery machine, a perforator can be mounted for each stitch position, and for operating the perforator at the stitch position, the individual stitch positions can be individually controlled by the program.

1 shows a plurality of stitch positions in a color changeable north embroidery machine, and a needle 11 and a perforator 13 are shown. Figure 2 shows the corresponding arrangement on the perforator guide 18 of a standard embroidery machine in which the color is not replaced. In the stitch position shown in FIG. 1 or FIG. 2, the perforator 13 is replaced by a cutting device 15. However, a greater number of cutting devices 15 may be used, for example one cutting device may be used for every fifth stitch position. As shown in FIG. 1, the fastening device 17, in particular, as shown in FIGS. 3 to 5, enables simple replacement of the perforator 13 and the cutting device 15. The fixing device 17 is fixed to the perforator tappet 21 of a perforator (not shown) by a nut 19 and is formed of a thin plate portion 23. The thin plate portion is provided with a bracket 25 made of a spring wire, And the bracket has a long arm (24) and a short arm (26). The thin plate portion 23 has an elastic arm 27 extending forward and the front portion of the arm is bent downward to form a hook 29 on which the long arm 24 can be locked. To this end, the long arm 24 is pressed against the hook 29, and the long arm 24 and the resilient arm 27 are elastically deformed to enable locking. The short arm 26 engaging into the notch 31 of the perforator 13 is inserted into the punch 33 (Fig. 4) ). In the same way, the cutting device 15 (Figures 5 and 7) including the notch 31 'can also be fixed.

3 to 5, the perforator 13 can be simply replaced with a cutting device 15. [

6 and 7, the cutting device 15 consists essentially of a support 35, an electric heating cartridge 37, a peak 39 that can be heated, and a spacer 41 . The spacer 41 includes a disk shaped portion 40 having an opening 42 at the front and through which a heatable peak 39 can protrude. The spacer 41 is adjustably fixed to the support 35 by screws 43, 44. This makes it possible to determine the insertion depth of the interchangeable peak 39 inserted into the layer of material to be cut.

The support 35 has, on the one hand, a bore 45 for receiving the rear portion of the heating cartridge 37. The bore 45 extends into the securing section 32 and enables the cutting device 15 to fit into the peg 33 of the perforator tappet 21 (Fig. 5). The notch 31 'enables to be fixed to the perforation device by means of a fixation device 17 in the same manner as the fixation of the perforator 13. The side slots 47 (FIG. 6) in the support 35 enable the clamping of the heating cartridge 37 by the screws 44. The ventilation holes 49 in the spacers 41 prevent undesirable heating of the spacers by the heating cartridge 37.

Figure 8 shows another embodiment of the cutting device. The cutting device 15 'consists essentially of a support 35', an electric heating cartridge 37, a peak 39 which can be heated and a spacer 41 '. The spacer 41 'is fixed to the support portion 35' by a screw 43. The vertical hole 46 allows the spacer 41 'to move before the screw 43 is tightened to determine the insertion depth for inserting the peak 39 into the layer of material to be cut.

The support 35 'includes a bore 45 having a rear portion of the heating cartridge 37 and a slot 47 for receiving a bayonet connection 51 having the same task as the stationary section 32 of Figure 5 . The pin 53 is inserted into the bayonet connection portion 51. [ The screw 44 is used to clamp the heating cartridge 37 and the bayonet connection 51. On the machine side, the corresponding bayonet connection 55 has a screw spring 56.

Fig. 9 shows a peak 39 'in which the heating cartridge 37 is not required. The peak 39 'consists of a wire portion 61 made of a material having a high melting point, such as nickel or tungsten, and is surrounded by a tube 63 or a nonconductive layer such as, for example, a ceramic. A thin metal layer 65 having a high melting point such as tungsten surrounds the front and the outside of the tube 63 so that an electrical connection is made between the front end of the wire portion 61 and the metal layer 65. Also, the metal layer 65 of the tube 63 is surrounded by a relatively thick metal sheath 66, such as copper, and the metal sheath does not surround the cutting area 67. The metal enclosure 66 is insulated by an insulating layer 69. At the rear, the electrical connections 71, 72 are arranged in the wire portion 61 and the metal sheath 66.

In operation, the cutting area 67 is heated by current flow. That is, heat is generated by the electric resistance heating unit in the cutting area. The heat can be changed rapidly because the mass of the metal layer heated in the heating region 67 is very small. This is particularly preferable when cutting sharp edges.

Fig. 10 particularly shows a side view of the cutting device 15 as shown in Figs. 5 and 7 after insertion into the embroidery machine according to Fig. The perforator 13 of the preceding stitch position is shown with the fastening device 17. If cutting is to be done by an embroidery machine during the appliqué process, the cutting device 15 is moved from the initial position to the material layer to be cut by the tappet 31 of the perforator in a controlled manner by an embroidery program, Peak 39 (FIG. 7) is inserted into material layer 73. The depth of insertion of the peak 39 is limited by the spacer 41 and the disk shaped portion 40 of the spacer is substantially pressed against the material layer 73. By the limited insertion depth, the stitch base 75 located behind or below the material layer 73 is prevented from being damaged. The program of the embroidery machine causes relative movement between the peak 39 and the material layer 73 after the heated peak 39 is inserted into the material layer 73, so that the planar material piece in the programmed form is cut. After the end of the cutting process, the drilling device moves the cutting device 15 back to the initial position (FIG. 1).

The present invention is summarized as follows:

At least one perforator 13 is first replaced with a cutting device 15 in the embroidery machine to apply a piece of flat material of the desired type to the stitch base 75. The cutting device 15 is controlled by a program of an embroidery machine and is moved to a cutting position by a punching device and then continuously cuts the cutting device 15 and the material layer 73 in a program- Relative motion is generated. The cutting device 15 has a stationary section 32 formed identically to the stationary section 34 of the perforator 13 so that the perforator 13 can be quickly replaced with the cutting device 15. For cutting, the cutting device 15 has a peak 39 to which the front can be heated, and the peak is inserted into the material layer 73 to be cut.

Figure 1 is a perspective view of a number of stitch positions that can be switched on and off separately, with a perforator replaced by a cutting device.

Figure 2 shows a perforator in a standard embroidery machine in which a perforator is replaced by a cutting device (not color-switched);

Fig. 3 shows that the perforator is fixed using a fixing bracket, from which the fixing bracket is detached from the anchor to separate the perforator. Fig.

Figure 4 shows the separation of the perforator.

Figure 5 shows the insertion of a cutting device.

Figure 6 is an exploded view of the cutting device according to Figures 1, 2 and 5;

Fig. 7 shows the cutting device of Fig. 6 in the assembled state; Fig.

8 is an exploded view of another embodiment of a cutting device.

Figure 9 schematically illustrates another embodiment of a peak that can be heated;

Figure 10 is a side view of the cutting device inserted into the embroidery machine in accordance with Figure 7 in the working position;

Claims (23)

Causing relative movement between the cutting device 15 and the material layer 73 in a controlled manner by means of an embroidery machine after at least one layer of material 73 is placed on the stitch base 75, A piece of flat material of the desired shape is cut so that a piece of flat material of the desired type is stitched on the stitch base 75 by an embroidery machine equipped with at least one perforator with a perforator 13 on the drill tappet 21. [ A method for applicating, The perforator 13 is replaced by a cutting device 15, Characterized in that the cutting device (15) is moved to the cutting position by the perforator tappet (21) in a controlled manner by the program of the embroidery machine and is returned to the initial position after the cutting process is carried out. A method for applica- tion to a stitch base. The cutting device according to claim 1, characterized in that the cutting device (15) has a peak (39) which can be heated and cutting of the piece of material is carried out by the heated peak (39) Method for applica- tion. 3. A method according to claim 1 or 2, characterized in that an intermediate layer which is soluble in solvent is inserted between the stitch base (75) and the material layer (73) and after the stitching and appliquing work is finished, And removing the flat material piece from the stitch base. 4. A method according to claim 3, characterized in that a fabric or foil is used as said intermediate layer. 4. The method of claim 3, wherein the intermediate layer comprises a heat reflective coating. A method according to claim 2, characterized in that a natural fiber fabric is used as the stitch base (75) and a synthetic fiber fabric is used as the material layer (73). A system comprising an embroidery machine having at least one perforation device, There is provided at least one cutting device for cutting a piece of flat material of a desired type from a material layer 73 disposed above the stitch base 75 using the embroidery machine, (32) is used to secure the perforator (13) of the perforator to the perforator for replacing the perforator (13) with the cutting device (15) . 8. The apparatus of claim 7, wherein the cutting device comprises a support (35) having the securing section (32), the securing section being formed identically to the securing section (34) of the perforator (13) Characterized in that it comprises an embroidery machine. 8. A device according to claim 7, characterized in that said stationary section (32) comprises a bore for inserting a punch (33) of the punch and a notch (31) for locking by means of a fastening device (17) A system comprising an embroidery machine. 9. The apparatus according to claim 8, characterized in that said support (35 ') comprises a bayonet connection (51) and said bayonet connection (51) is connected to a corresponding bayonet connection (55) A system comprising an embroidery machine. delete 11. A system according to any one of claims 7 to 10, characterized in that said heatable peak (39) is formed by a perforator. 11. A system according to any one of the claims 7 to 10, characterized in that spacers (41) are arranged in the heatable peak (39). 14. Device according to claim 13, characterized in that said spacer (41) comprises a disk-like part (40) with an opening (42) in front, and said heatable peak (39) protrudes through said opening A system comprising an embroidery machine. 14. The apparatus according to claim 13, wherein the spacer (41) is adjustable to determine an insertion depth of the heatable peak (39) inserted into the material layer (73) system. 11. A system according to any one of claims 7 to 10, characterized in that the heatable peak (39) can be heated by the heating cartridge (37). 17. A system according to claim 16, characterized in that said heatable peak (39) is arranged interchangeably in said heating cartridge (37). 11. A system according to any one of claims 7 to 10, characterized in that the heatable peak (39 ') comprises an electrical resistance heating part in the cutting area (67). 19. The method of claim 18, wherein the heatable peak (39 ') comprises a wire portion (61) in a tube (63) of ceramic material, the front and the exterior of the wire portion are surrounded by a metal layer , Said metal layer being used as an electrical resistance heating part in said cutting area (67). delete delete delete delete

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