RU2373309C1 - Device for hermetic sealing of places of thread joints in garments - Google Patents

Abstract

FIELD: textile, paper.

SUBSTANCE: invention relates to clothing equipment and can be used to manufacture special-purpose garments and domestic water-resistant clothes made of textile materials having waterproof finishing workmanship as well as of the materials with film coatings. The device has a tank for the sealing compound, compressor, pressure controller, pipeline system, air suction system and nozzles. In order to ensure a required level of point positioning of the sealing compound in places where the thread joints get penetrated by the needle along the thread seam the device structure houses an additional controller connected to the rotation angle sensor installed on the sewing machine shaft. The controller uses its other outlet to connect to an air solenoid valve that uses the air-driven pipeline to connect to the tank containing the liquid-phase sealing component.

EFFECT: invention ensures control over the required level of point positioning of the sealing compound in places where the thread joints get penetrated by the needle.

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Description

The invention relates to the field of sewing equipment and can be used in the manufacture of special-purpose garments and household waterproof clothing from textile materials with water-repellent final finish, as well as from materials with film coatings.

A device for sealing places of thread connections of clothing parts [1], including a container for supplying a sealing compound, a piping system and a pneumatic chamber installed in the pallet of the sewing machine kinematically connected with the gear rack of the material transfer mechanism. However, this device is not able to provide sufficient consistency and accuracy when applying the polymer to the place of perforation of the fabric with a needle, because the synchronization of the technological processes of grinding and sealing is based on the pneumomechanical method of feeding the sealant, the design does not provide for a sufficient number of elements of control and regulatory equipment, morally obsolete and substandard components and parts, which together leads to inaccurate application of sealant to each needle puncture tissue th.

A device for blocking the holes formed by the needle when sewing on a sewing machine [2], adopted for the prototype, including a container with a sealing compound, a compressor, pressure regulator, pressure and suction pipelines, pressure gauge, supply and suction nozzles and a pneumatic chamber kinematically connected with gear rail of the sewing machine. A significant disadvantage of the prototype is that due to the orientation of its actuators to pneumomechanical control and the lack of standardized pneumatic and automatic elements in the structure, it does not provide the necessary control over the control of the sealing process and does not allow flexible adjustment and adjustment of its parameters, thereby not allowing to obtain the required technological effect of hydrophobization of the places of the thread connection, under which, first of all In the meantime, it is understood that a completely waterproof filament seam having minimal rigidity is understood.

The technical result of the claimed device is to provide the necessary level of localization of the sealing compound in the area of the needle puncture places of the thread joints along the direction of the thread line.

The specified technical result is achieved by the fact that in the device for sealing places of thread joints of garments containing a container for a sealing compound, a compressor, a pressure regulator, a piping system, an air suction system and a nozzle, according to the invention, an additional controller is connected associated with one output with a rotation angle sensor mounted on the main shaft of the sewing machine, and another output - with an electromagnetic pneumatic valve connected through a pneumatic pipeline to a container containing liquid Phase sealant.

A device for sealing places of thread connections of garments allows achieving exceptional accuracy when controlling the process of applying a polymer composition to a place of perforation of a fabric with a needle, because the automatic subsystem “angle of rotation sensor - programmable controller - electromagnetic pneumatic valve” allows you to accurately track the time of approach of a needle to the nozzle feeding the sealant and, due to its high speed, inject a microdose of the sealant into the puncture channel with a needle.

In the drawings: FIG. 1 shows a general three-dimensional view of the sewing machine with the inventive device, FIG. 2 is a structural diagram of the inventive device, FIG. 3 is a nozzle arrangement diagram, FIG. 4 is a diagram of a sealant supply to a needle puncture with an educated in it weaving threads.

The device for sealing places of thread connections of garments to a universal grinding sewing machine 1 (Fig. 1) includes a rotation angle sensor 2, mounted on the main shaft of the machine, and two modular blocks 3 and 4.

The main modular unit 3 consists of a metal case, in which on special DIN rails a programmable controller 5 is installed (Fig. 2), connected by an electric cable to the operator panel 6, fuses 7 and 8 at the input of the electric circuit of controller 5, elements of the discharge pneumatic line 9, connected in series with a PVC tube and quick-detachable collets: pressure regulator 10, air flow regulator 11 and electronic pressure gauge 12. The modular unit 3 contains electrical and pneumatic switching lines.

The auxiliary modular unit 4 consists of a metal case mounted on the bottom surface of the table of the sewing machine, in which a compressor 13 is mounted on special DIN rails, connected to the solenoid valve 14 and connected in series with the PVC pipe and quick-detachable fittings with vacuum line elements 15: regulator air flow 16, a vacuum regulator 17, a filter-moisture trap 18, a mechanical vacuum gauge 19 and containers 20 and 21 of the discharge and suction pneumatic lines, respectively. In addition, block 4 contains electrical and pneumatic switching lines.

On the presser foot and the needle plate of the sewing machine behind the needle 22 (FIG. 3), the feed and suction nozzles 23 and 24, respectively, connected to the pipelines 25 and 26 of the discharge and suction lines are installed using pivot-threaded connections.

The device operates as follows.

At the beginning of the stitching cycle, the needle 22 of the sewing machine 1 begins to move downward due to a change in the angular displacement of the main shaft of the machine, on which the rotation angle sensor 2 is fixed, thus making a puncture of the material. Sensor 2 detects the increment of the angle of rotation of the main shaft and transmits information through an electric wire connection to the programmable controller 5. Controller 5, according to a program written down in its memory, at the moment when the needle 22 punctures the fabric, moves up, sends a command to the discrete output of the controller connected to a normally closed solenoid valve 14, to which a discharge pneumatic line 9 is connected, powered by a compressor 13. When the voltage is applied to it, valve 14 opens at some time implementing pulsed air supply at a suitable pressure and flow rate into the container 20 with the sealing composition. Since the overpressure is thus created in the container 20, the microdose of the liquid-phase sealant is forced out and through the supply pipe 25 it enters the feed nozzle 23 (Fig. 3), fixed on the underside of the needle plate and then is injected exactly into the hole from the puncture of the fabric with a needle, which at this moment it has already moved to the required stitch length.

Along with the nozzle 23 feeding the sealant, a suction nozzle 24 connected to the vacuum pneumatic line 15 supplied by the compressor 13 through the suction pipe 26 is coaxially attached to the sewing machine foot. Through this nozzle, a constant vacuum of a certain size is created in the needle puncture channel, which increases the gradient filling a puncture with the interlacing of threads formed in it with a liquid-phase hydrophobizing composition.

The advantage of the invention is that when implementing the technology of hydrophobization of the seams of waterproofing products in this complex, with the optimal ratios of the viscosity of the hydrophobizing solution and the pressure of its supply to the bottom surface of the thread line, the spot application of the liquid-phase polymer composition with the maximum depth of the treatment zone was achieved. It was also experimentally established (a device from Wapertest FF-13, Hungary and a PVD-2 device from the Ivmashpribor plant (Ivanovo, Russia)) that the level of water-protective properties of a garment compared to an untreated seam increased by 2 times in dynamic conditions and by 40 -50% in static conditions. Seams that are sealed during grinding under cyclic tension and bending have a water resistance of 20-30 times greater than unsealed ones. The processing resistance to aggressive factors was proved: reduction of water resistance after dry cleaning by 15%, after 5 washes by 27%. The maximum application of water-repellent substance directly along the line of the line and its gradual decrease with distance from the seam guarantee the elasticity of the thread connection and the absence of an abrupt increase in stiffness in the treatment zone.

Information sources

1. Patent 2120509, RF, MKI D05B 1/26. Device for sealing thread stitches. / Nikolskaya B.C., Veselov V.V., Meteleva O.V., Repyev A.A., Zhuravleva E.V., Nemikhina M.V. - No. 95112247/12; claimed July 18, 1995; published on 10/20/1998; Bull.№29.

2. Utility Model Certificate No. 9847, RF, MKI D05B 1/26. A device for blocking the holes formed by the needle when grinding. / Nemikhina M.V., Meteleva O.V., Veselov V.V., Tsapalov B.M. Publ. 05/19/99.

Claims (1)

A device for sealing places of thread connections of garments, comprising a container for a sealing compound, a compressor, a pressure regulator, a piping system, an air suction system and a nozzle, characterized in that a controller is further included in the device associated with a rotation angle sensor mounted on the main shaft of the sewing machine, with another output, the controller is connected to an electromagnetic pneumatic valve connected through a pneumatic pipeline to a container containing liquid-phase sealant.

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