KR20080094598A - Method for applique of flat pieces of material and, cutting device and embroidery machine for realizing the same - Google Patents

Abstract

A method for the applique of flat pieces of material and, a cutting device and an embroidery machine for realizing the same are provided to drive a punch device by a program of the embroidery machine so that a cutting device is moved to a cutting position. At least one material layer(73) is arranged on a stitch base(75). Thereafter, the relative motion is generated between a cutting device(15) and the material layer through the control manner by a program of the embroidery machine. The plane material piece with a desired shape is cut from the material layer. The cutting device is moved toward a cutting position by a punching device and returned to the initial position after the cutting process. The cutting device has a peak capable of being heated. A middle layer is inserted between the stitch base and the material layer and melted into the solvent. The middle layer is removed within a solution bath after the completion of the stitch- and applique work. The textile or foil is used as the middle layer. The middle layer includes also a heat reflection coating.

Description

Method for applique of flat pieces of material and, cutting device and embroidery machine for realizing the same}

The present invention relates to a method for applicating a piece of planar material of a desired shape to a stitch base using an embroidery machine. The invention also relates to a cutting device and an embroidery machine for carrying out the method.

Embroidery machines are machines that form stitches in accordance with the "Embroidery Technique" (Schoener / Fricker, Leipzig, 1982, pages 18/20), which are technically limited in the direction and size of each individual stitch. You can change it freely. This makes it possible to form a decorative pattern. However, from a few years ago, embroidery machines were used to form patterns with technical functions, such as conductors. Most embroidery machines used today work according to a two-thread system, and the formation of the stitch pattern on the stitch base is done by program control. Practically divided into large embroidery machine and small embroidery machine. The drum embroidery machine was most widely used as a large embroidery machine. In the drum embroidery machine, the needles are arranged linearly in a row. In particular, flat embroidery machines manufactured by Pfaff are less popular, in which needles are distributed throughout the stitch field. According to Schoener / Freier, page 100, the flat embroidery machine is used to make a wide cotton product, such as a tablecloth, curtain, embroidery-quilting product and the like. Also, the so-called quilting machine is a large embroidery machine from a technical point of view. The quilting machine likewise works with a book, but includes only a row of needles, unlike a flat embroidery machine capable of producing embroidery-quilting products. As small embroidery machines in particular single- and multiple head-stitch automatic machines are known.

In Schoenr / Freier, page 310 and below, "appliques" refers to other pieces of material or objects, in a narrow sense, to cut pieces of fabric and fabric designs, or forms of leather, paper, felt and the like. will be. In other words, "The appliqué work is the use of a variety of sewn and interwoven fabrics, with certain parts cut or cut to form a pattern before or after being patched in the embroidery industry. Case-it shall be distinguished in terms of its color or texture and shall stand out from one another depending on the material or by contrasts such as matte and gloss. " Schoener / Freier categorizes appliques into two categories, one for stitching a part that has already been cut as a pattern, and the other for stitching two or more stitched fabrics where the parts are cut after fixing or stitching.

Schoener / Freier, page 312 states that a variety of link embroidery between two fabrics can be implemented. Thus, it is possible to sew the contours of the design and then cut the fabric and tightly stitch the edges once again. In other words, the fabric must be carefully cut in all operations, ie handmade embroidery or machine embroidery. For this purpose, fine embroidery scissors with wider blades facing down are used. If you cut with the peak facing down, there is a risk of cutting into the stitch base. DE 44 26 817, published in 1995, describes a stitching method in which a frame in which two layers of material are fixed is moved according to the shape cut from the upper layer of material. The upper material layer is cut by the laser beam. Subsequently the needle rod is moved during the stitching process and embroidery is completed along the cutting edge. In US 5 915 316, based on the priority of 1995, a multi-head-embroider with a laser head for the formation of an applique is known. DE 10 2005 050 482 is also known for a book embroidery machine having a laser cutting head which can be positioned longitudinally via a spindle drive on the front side of the machine. Cutting with a laser has a big disadvantage. This is because the laser device is very expensive. In general, this excludes the possibility of placing multiple such devices on one machine. In addition, laser devices have disadvantages that require a lot of space around the machine and protective measures for eye protection. Nevertheless, laser cutting has been adhered to so far.

Unpublished European Patent 07 405 210 discloses a support which extends over the length of the embroidery machine and is arranged with a device for stitching sequins, a device for stitching laces and an applicator for pieces of planar material. In addition, in order to operate the device for stitching sequins or laces, the working organ is extended over the length of the embroidery machine.

The device for applique includes a peak which can be heated as a cutting device, which peak can be moved to the cutting position by an actuator, such as a pneumatic cylinder and back to the rest position. The device is relatively expensive in manufacturing and can be used with relatively expensive structures required for devices that stitch sequins or laces, which extend over the length of the embroidery machine.

The object of the present invention is to enable the application of a piece of planar material in the form of a pattern, for example made of textile material or other suitable material, to the stitching base using an embroidery machine, and to accommodate and operate additional support and operating organs and the embroidery machine. It is to provide a method and apparatus that does not require retrofitting the structure.

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

This method has the advantage that the embroidery machine does not have to be structurally deformed. There is no need for special supports and working organs. Rather, it is sufficient to replace the perforator of the perforation device with a suitable cutting device in the desired position, and the perforation device 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 the operation of the embroidery machine. . In addition, relative cutting between the cutting device and the material layer is made by the program to cut the planar piece of material.

Basically, a laser or mechanical cutting tool is used as the cutting device. However, a narrow space is usually provided in the embroidery machine for the drilling device, which makes it difficult to use the tool. Thus, the cutting of the piece of material is preferably effected by heated peaks.

After long experiments and test runs, it has been found that the cutting of the material layer can be reliably made by the peak which can be heated. This proved that the suspicion that the stitch base under the material layer was damaged by heat was unfounded. However, proper material selection, proper forward movement speed, and proper temperature of peaks that can be heated are assumed. The empirical value for this can be determined by test execution. Natural fiber fabrics are used as stitch bases, and synthetic fiber fabrics are used as material layers. Proper forward travel speed and cutting upon heating of the peaks that can be heated are achieved by melting the synthetic fibers.

If the stitch base is relatively heat sensitive, it is preferred to insert an intermediate layer for thermal insulation between the stitch base and the material layer, which can be dissolved by a solvent. After the end of the stitch-and applique operation, the intermediate layer can be removed by insertion into a solvent bath.

Fabrics can be used as the intermediate layer. Especially for heat sensitive stitch bases an interlayer comprising a heat reflective coating is suitable.

The invention is not limited to appliques of fabric pieces. Other materials are also suitable, such as, for example, synthetic fiber sheets or nonwovens.

The invention also relates to a cutting device for an embroidery machine equipped with at least one punching device for cutting pieces of planar material of the desired shape from a layer of material arranged on a stitch base using an embroidery machine. According to the invention, the cutting device is characterized by fastening means for securing the cutting device to the drilling device. For this purpose, the cutting device may comprise a support having a fixed section, the static section being formed identically to the fixed section of the perforator of the drilling device. This is sufficient to replace the perforator with a cutting device at the stitch position for cutting if the embroidery machine for applique work needs to be retrofitted.

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

Preferred embodiments of the cutting device include a peak that can be heated. The advantages of the peaks that can be heated are described above. Peaks that can be heated can also be formed with perforators. This has the advantage that peaks that can be heated can be used for drilling as well as for cutting. Preferably an electric heating cartridge is used for heating the peaks. Preferably the peaks are replaceably arranged in the heating cartridge.

It has proved particularly desirable to place spacers at peaks that can be heated. The spacer is pressed against the fabric layer at the working position of the cutting tool and ensures that the peak can not be inserted into the stitch base but only into the material layer to be cut. To determine the depth at which the peaks that can be heated are inserted into the material layer, the spacers can preferably be adjusted. The spacer can be fixed to the fixing part with screws. However, in order to allow for quick detachment, the spacer can only be arranged to be insertable into the fixing part. This may be desirable if a peak that can be heated is used for drilling as well as for cutting. The spacers must be separated to allow perforation.

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

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

The perforators may be arranged in the perforator guides in various patterns, and the perforator guides may be moved toward the stitch base in a controlled manner by the program of the embroidery machine for perforation. In the case of a color changeable embroidery machine, a perforator can be mounted at each stitch position, and in order to operate the perforator at the stitch position, the individual stitch positions can be individually controlled by a program.

1 shows a number of stitch positions in a book replaceable book embroidery machine, with a needle 11 and a perforator 13 shown. 2 shows the corresponding arrangement on the perforator guide 18 of a standard embroidery machine without color replacement. In the stitch position shown in FIG. 1 or FIG. 2, the perforator 13 is replaced with a cutting device 15. However, a larger number of cutting devices 15 can be used, for example one cutting device for every fifth stitch position. As in FIG. 1, in particular as shown in FIGS. 3 to 5, the fastening device 17 enables simple replacement of the perforator 13 and the cutting device 15. The fixing device 17 is fixed to the perforator tappet 21 of the drilling device (not shown) by the nut 19, made of a thin plate portion 23, and a bracket 25 made of spring wire on the thin plate portion. To this end, 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 inclined downward to form a hook 29 to 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 elastic arm 27 are elastically deformed to enable locking. Since the long arm 26 is under spring stress after locking in the hook 29, the short arm 26 that engages into the notch 31 of the perforator 13 has a perforator 13 fitted into the peg 33 (FIG. 4). ) Securely. In the same way, the cutting device 15 (FIGS. 5 and 7) including the notch 31 ′ can also be fixed.

As shown in FIGS. 3 to 5, the perforator 13 may simply be replaced with a cutting device 15.

In particular, as shown in FIGS. 6 and 7, the cutting device 15 consists substantially of the support 35, the electric heating cartridge 37, the peak 39 which can be heated, and the spacer 41. . The spacer 41 includes a disc shaped portion 40 having an opening 42 in the front, through which the peak 39 which can be heated can protrude. The spacer 41 is fixedly fixed to the support part 35 by screws 43 and 44. This makes it possible to determine the insertion depth of the replaceable peak 39 inserted into the material layer 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 allows the cutting device 15 to fit into the peg 33 of the perforator tappet 21 (FIG. 5). The notch 31 ′ makes it possible to be fixed to the drilling device by the fixing device 17 in the same manner as the fixing of the drilling machine 13. Side slots 47 (FIG. 6) in the support 35 allow for clamping of the heating cartridge 37 by screws 44. The ventilation hole 49 in the spacer 41 prevents undesired heating of the spacer by the heating cartridge 37.

8 shows another embodiment of a cutting device. 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 'is fixed to the support part 35' by the screw 43. As shown in FIG. The vertical hole 46 makes it possible to move the spacer 41 'before the screw 43 is tightened to determine the insertion depth for inserting the peak 39 into the material layer to be cut.

The support 35 ′ has 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 fixing section 32 of FIG. 5. Include. The pin 53 is inserted into the bayonet connection 51. Screw 44 is used to clamp heating cartridge 37 and bayonet connection 51. On the machine side, the corresponding bayonet connection 55 has a screw spring 56.

9 shows a peak 39 ′ that requires no heating cartridge 37. 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 non-conductive layer such as a tube 63 or ceramic, for example. A thin metal layer 65 having a high melting point, such as tungsten, for example, 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. In addition, the metal layer 65 of the tube 63 is surrounded by a relatively thick metal sheath 66, for example copper, which does not surround the cutting area 67. The metal sheath 66 is insulated by the insulating layer 69. In the rear, the electrical connections 71, 72 are arranged in the wire part 61 and the metal sheath 66.

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

FIG. 10 shows in particular a side view of the cutting device 15 as shown in FIGS. 5 and 7 after insertion into the embroidery machine according to FIG. 1. The perforator 13 in the preceding stitch position is shown with the fixing device 17. When cutting is to be made by the embroidery machine during the applique process, the cutting device 15 is moved from the initial position to the material layer to be cut by the tappet 31 of the punching device in a controlled manner by the embroidery machine's program. Peak 39 (FIG. 7) is inserted into material layer 73. The insertion depth of the peak 39 is limited by the spacer 41, and the disk shaped portion 40 of the spacer is almost pressed against the material layer 73. Due to the limited insertion depth, the stitch base 75 behind or below the material layer 73 is prevented from being damaged. After the heated peak 39 is inserted into the material layer 73, the program of the embroidery machine causes relative motion between the peak 39 and the material layer 73, so that a piece of planar material of the programmed shape is cut. After the end of the cutting process, the drilling device moves the cutting device 15 back to its initial position (FIG. 1).

The invention is summarized as follows:

At least one perforator 13 is first replaced with a cutting device 15 in the embroidery machine to approve a piece of planar material of the desired shape to the stitch base 75. The cutting device 15 is controlled by the program of the embroidery machine and moved to the cutting position by the punching device, and then the cutting device 15 and the material layer 73 in a program-controlled manner to cut the piece of material. Relative movement occurs in between. In order to enable the perforator 13 to be quickly replaced by the cutting device 15, the cutting device 15 has a securing section 32 formed identically to the securing section 34 of the perforator 13. For cutting the cutting device 15 has a peak 39 which can be heated in the front, which is inserted into the material layer 73 to be cut.

1 is a perspective view of a number of stitch positions that can be switched on and off separately, in which the perforator has been replaced with a cutting device;

2 shows the perforator in a standard embroidery machine in which the perforator is replaced with a cutting device (not color replaced).

Figure 3 shows that the perforator is fixed using a fixing bracket, in which the fixing bracket is separated from the anchor to separate the perforator.

4 shows the separation of the perforator.

5 shows the insertion of a cutting device.

6 is an exploded view of the cutting device according to FIGS. 1, 2 and 5.

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

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

9 schematically illustrates another embodiment of a peak that may be heated.

10 is a side view of the cutting device inserted into the embroidery machine according to FIG. 7 in a working position;

Claims (20)

After the at least one material layer 73 is disposed on the stitch base 75, a relative motion between the cutting device 15 and the material layer 73 is generated in a controlled manner by a program of the embroidery machine, thereby from the material layer In the method for applying a piece of planar material of the desired shape to the stitch base 75 by cutting the piece of planar material of the desired shape by means of an embroidery machine equipped with at least one punching device with the punching machine 13, The cutting device 15 is moved to the cutting position by the punching device in a controlled manner by a program of the embroidery machine, and is returned to the initial position after the cutting process. Method for applique. The planar material piece according to claim 1, characterized in that the cutting device (15) has a peak (39) which can be heated, and the cutting of the piece of material is carried out by the heated peak (39). Method for applique. 3. An intermediate layer which can be dissolved in a solvent is inserted between the stitch base 75 and the material layer 73, and after completion of the stitch- and applique operation, the intermediate layer is placed in a solvent bath. And removing a piece of planar material to the stitch base. 4. A method according to claim 3, wherein a fabric or foil is used as said intermediate layer. 5. The method of claim 3 or 4, wherein the intermediate layer comprises a heat reflecting coating. 6. A piece of planar material according to claim 2, wherein a natural fiber fabric is used as the stitch base 75 and a synthetic fiber fabric is used as the material layer 73. Method for appliques. In the cutting device for embroidery machine equipped with at least one punching device, for cutting a piece of planar material of a desired shape from the material layer 73 disposed on the stitch base 75 using the embroidery machine, Cutting device, characterized in that a fixing means (17) is provided for fixing the cutting device (15) to the drilling device. 8. The cutting device according to claim 7, wherein the cutting device comprises a support (35) having a securing section (32), said securing section being formed identically to the securing section (34) of the drilling machine (13) of the drilling device. The cutting device characterized by the above-mentioned. 8. The securing section (32) according to claim 7, characterized in that the securing section (32) comprises a bore for fitting the peg (33) of the drilling device and a notch (31) for locking by the fixing device (17) of the drilling device. Cutting device. 9. Cutting device according to claim 8, characterized in that the support (35 ') comprises a bayonet connection (51) for connecting to a corresponding bayonet connection (55) of the drilling device. 11. Cutting device according to any of the claims 7 to 10, characterized in that the cutting device comprises a peak (39) which can be heated. 12. Cutting device according to claim 11, characterized in that the heatable peak (39) is formed with a perforator. 13. Cutting device according to claim 11 or 12, characterized in that a spacer (41) is arranged at the heatable peak (39). 14. The spacer (41) according to claim 13, characterized in that the spacer (41) comprises a disc shaped portion (40) having an opening (42) in front, through which said heated peak (39) protrudes. Cutting device. 15. The method according to claim 13 or 14, characterized in that the spacer (41) can be adjusted to determine the insertion depth of the heatable peak (39) inserted into the material layer (73). Cutting device. 15. Cutting device according to any of the claims 7-14, characterized in that the heatable peak (39) can be heated by a heat cartridge (37). 12. Cutting device according to claim 11, characterized in that the heatable peak (39) is replaceably arranged in the heating cartridge (37). 15. Cutting device according to any of the claims 7-14, characterized in that the heatable peak (39 ') comprises an electrical resistance heating in the cutting area (67). 18. The heatable peak (39 ') comprises a wire portion (61) in a tube (63) made of ceramic material, the front and outside of the wire portion being surrounded by a metal layer (65). And the metal layer is used as an electric resistance heating unit in the cutting region (67). Embroidery machine comprising at least one cutting device (15) according to any of the claims 7-19.

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