KR100797890B1 - Ultrasonic welding device - Google Patents

Abstract

The present invention relates to an ultrasonic fusion apparatus for bonding chemical fiber fabrics by heating them above the melting point using ultrasonic energy to melt them, and then applying pressure to maintain the airtightness.

The present invention is a fabric pressing portion having a pressing roller for pressing a plurality of sewing fabric supplied on the frame; An ultrasonic generator having a tool horn disposed to face the pressure roller, the tool horn melt-bonding the overlapped portions of the sewing fabric; A height adjusting part having a driving cylinder for raising and lowering the far-end pressing part and adjusting the pressing force of the roller; A fabric discharge part having a driving roller and a support roller for drawing out the sewing fabric which has passed through the fabric pressing part; And a scaffolding unit including a switch for transmitting a driving force to the distal pressing unit, operating a tool horn of the ultrasonic wave generating unit, and operating switches for operating the driving cylinder of the height adjusting unit.

According to the present invention by fusion through the ultrasonic welding it can prevent the seam puckering (sam puckering) in the fin portion and maintain the airtight can make the sewing quality of the chemical fiber fabric perfect.

Description

Ultrasonic Fusion Apparatus {Ultrasonic Fusion Apparatus}

1 is an external appearance of the ultrasonic welding device according to the invention as a whole;

Figure 2 is a cross-sectional view showing the entire internal structure of the ultrasonic welding device according to the present invention;

Figure 3 is a view showing the internal structure of the distal pressing portion provided in the ultrasonic welding device according to the present invention in detail a partial cutaway perspective view of the pressing roller portion;

Figure 4 is a photograph showing in detail the pressure roller portion provided in the ultrasonic welding device according to the present invention;

Figure 5 is a side cross-sectional view showing the overall structure of the ultrasonic welding device according to the present invention.

Figure 6 is a side view showing in detail the support roller of the discharging portion of the fabric discharge unit provided in the ultrasonic welding device according to the present invention;

7 is an operating state diagram showing a state in which the chemical fiber fabric is bonded by the ultrasonic welding device according to the present invention;

8 is a photograph showing a portion made by the ultrasonic welding device according to the present invention.

<Explanation of symbols for the main parts of the drawings>

1 .... Ultrasonic welding device according to the present invention

5 .... frame 10 ..... fabric pressurization

12 ... pressure roller 14 .... drive motor

14a ... axis of rotation 16 .... universal joint

18a ... timing gear 18b ... timing belt

18c ... Shaft 20 ... Casing

30 .... Fabric outlet 32 .... Drive roller

34a .... timing gear 34b .... timing belt

34c .... shaft 40 .... ultrasonic generator

42 .... Tool Horn 44 .... Booster

46 .... Oscillator 50 .... Power Connection

52 .... Electrode Ring 54 .... Carbon Electrode

56 .... rotary motor 58a .... belt

58b ... pulley 60 .... cooling fan

70 .... Height adjustment 72 .... Drive cylinder

72a ... load 74 .... pneumatic regulator

76 .... solenoid valve 80 ..... pressure control

82 .... stopper 90 .... elastic force adjusting means

92 .... Double nut 94 .... Fixture

96 .... bolt 98 .... support shaft

102 ... connecting rod 106 .... handle

108 .... Eccentric Disc 120 ..... Footboard

130 .... Fabric Supply Part 132 .... Supply Reel

140 .... Guide 142 .... Operation Switch

144 .... electric switch 150 .... head knob handle

160 .... Ultrasonic Oscillator B .... Bearing

c1, c2 .... fabric

The present invention relates to a device for bonding chemical fiber fabrics by using ultrasonic welding, and more specifically, ultrasonic welding using a ultrasonic energy to heat the chemical fiber fabric above the melting point to melt and then pressurized to maintain the airtight by applying pressure Relates to a device.

In general, the ultrasonic welding machine is a method of welding a workpiece using vibration of sound waves to generate electrical energy of 20-40 kHz (1sec) through a generator using a 50 / 60Hz power source, When converted into mechanical vibration energy through the booster, and then transmitted to the workpiece through the tool horn, the frictional heat generated by the strong vibration instantaneously melted and bonded to the joint surface of the workpiece.

Such ultrasonic welding causes a small vertical vibration in the ultrasonic welding portion to reach the welding line through the component at the apex and dissolve the interface there. The component must be absolutely free in this vertical movement and the time is generally between 0.1 and 1 second. Energy directors are usually used in areas requiring relatively low strength welding with amorphous materials, and shear joints with larger welding depth than energy director welding are used for hermetic sealing.

Partially crystalline resin is more difficult to fusion than amorphous resin, and when the melt viscosity is high, the molten material flows out of the fusion region. Therefore, shear joints should be used in fusion designs to prevent this. Heat is generated very locally and the affected area is only a few tenths of a millimeter, so the shrinkage stress is higher than in other fusion processes. Examples of applications of ultrasonic welding in applications other than protective clothing include micro switches, steam iron buckets, fuse holders, pump housings and connectors.

On the other hand, "safety protective clothing" means protective clothing that is worn to protect workers from the hazardous environment caused by the work or the workplace itself in the place where the work is being carried out. It acts as a barrier to the direct contact with the body's fine chemical toxic substances, while also discharging the body's sweat and heat generated by the body's movements while performing work, thereby providing comfort. It will always play a role in increasing the efficiency of the work.

In other words, safety protective clothing protects workers from harmful environments and improves work comfort and improves work efficiency. Therefore, in order to prevent safety accidents and to raise safety awareness of unions and owners who want to protect workers, The demand is expected to expand further in the future.

By the way, in the case of producing safety protective clothing by the general sewing method, the safety protective clothing is used to combine the fabrics using the service, wherein each combination is completely made by the tooth, the pressure of the presser foot, the service tension and the type of the fabric. If not, a puckering phenomenon occurs, in which unwanted small wrinkles occur around the seam of the seam.

In the case of safety protective clothing, dust or chemicals can penetrate into the seam, and this is prevented through a seal sealing process that is thermally bonded with tape. Particularly, the part where perkering occurred is very difficult to seal, and it is easy to be defective. Therefore, the finished product is treated poorly due to minor mistake, which accounts for more than 70% of the labor cost and most of the cost of lost processing. . Therefore, there is an urgent need for a new ultrasonic welding device that can solve these problems in order to improve productivity.

The present invention is to solve the conventional problems as described above, the purpose is to sew a chemical fiber fabric, the problem is that the puckering (seam puckering) occurs to solve the problem that the sewing process is poor, It is an object of the present invention to provide an ultrasonic welding device capable of achieving a good quality sewing work by keeping airtightness completely in a part.

In another aspect, the present invention is to provide an ultrasonic welding device that can achieve a significant increase in productivity while reducing the specific gravity of the labor by making the sewing operation while maintaining the airtight portion easily in the 씸 part as another object.

In order to achieve the above object, the present invention, in the apparatus for sewing and bonding the chemical fiber fabric using ultrasonic fusion,

A frame constituting the support structure;

A fabric pressing portion provided with a pressing roller for pressing a plurality of sewing fabrics supplied onto the frame;

An ultrasonic generator having a tool horn disposed to face the pressure roller to transmit ultrasonic waves to the sewing fabric and to melt-bond the overlapped portions of the fabric;

A height adjusting part having a driving cylinder for raising and lowering the far-end pressing part and adjusting the pressing force of the roller;

A fabric discharge part including a driving roller and a support roller for drawing the sewing fabric passing through the pressure roller of the fabric pressing part and the tool horn of the ultrasonic wave generating part; And

And a scaffolding unit for transmitting driving force to the pressing roller of the fabric pressing unit and the driving roller of the fabric discharging unit, operating a tool horn of the ultrasonic wave generating unit, and operating switches for operating the driving cylinder of the height adjusting unit. Provided is an ultrasonic welding device characterized in that the joint is sewn while maintaining airtightness at the fin portion.

And the present invention preferably provides an ultrasonic welding device characterized in that it further comprises a fabric supply unit for supplying a plurality of sewing fabrics on the sewing surface of the frame.

In another aspect, the present invention preferably the fabric supply unit is characterized in that the ultrasonic wave is provided with supply reels arranged for each path on the frame so that the fabric is supplied through a different path on the sewing surface of the frame Provide a fusion device.

And the present invention is preferably bent toward the side between the pressing roller of the pressing portion of the pressing portion and the ultrasonic generator of the ultrasonic generator so that the distal end can be supplied to the correct position between the pressing roller of the pressing portion and the tool horn of the ultrasonic generator. It provides an ultrasonic welding device characterized in that it further comprises a guide.

In addition, the present invention is preferably the distal pressing portion is provided with a drive motor for rotating the pressure roller, the rotational force of the drive motor is configured to be raised and lowered during the rotation of the roller by being transmitted to the pressure roller through a universal joint It provides an ultrasonic welding device characterized in that.

And the present invention is preferably ultrasonic fusion device, characterized in that the tool horn of the ultrasonic generator is rotatably connected to the rotational motor, the upper surface of the tool horn is configured to change the position supporting the fabric To provide.

In another aspect, the present invention preferably provides an ultrasonic welding device characterized in that the drive roller of the discharging portion is connected to the drive motor for rotating the pressing roller of the discharging portion of the discharging portion.

And the present invention preferably provides an ultrasonic welding device, characterized in that the drive roller of the discharging portion of the discharging portion having the same diameter as the pressing roller of the discharging portion has the same circumferential speed.

In another aspect, the present invention preferably provides an ultrasonic welding device characterized in that the support roller of the discharging portion is elastically supported toward the drive roller by a spring.

And the present invention preferably the discharging portion is provided with an elastic force adjusting means for adjusting the spring pressing force of the support roller, the elastic force adjusting means is a double nut screwed on the upper end of the support roller, and the fixed base on which the double nut is supported It provides an ultrasonic welding device characterized in that it comprises.

In another aspect, the present invention preferably the discharging portion is provided with a handle for raising the support roller from the drive roller, the handle is raised on the lower end of the connecting rod by the eccentric eccentric disk to lift the projection of the connecting spring pressurizing the spring It provides an ultrasonic welding device characterized in that for raising the support roller fixed to be rotatable.

And the present invention preferably provides an ultrasonic welding device, characterized in that the drive cylinder of the height adjustment unit is made of a pneumatic cylinder.

In another aspect, the present invention preferably the height adjustment portion further comprises a pressing force adjusting portion for controlling the lowering position of the pressure roller by controlling the lowering of the rod on the top of the drive cylinder, the pressing force adjusting portion is screwed to the top of the rod It provides an ultrasonic welding device characterized in that it further comprises a stopper.

And the present invention preferably provides an ultrasonic welding device characterized in that it further comprises a cooling fan for removing the heat generated during the operation of the ultrasonic generator.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

The ultrasonic welding device 1 according to the present invention is a device for sewing a chemical fiber fabric using ultrasonic welding as shown in Figs. 1 and 2 as a whole.

The main material of the fabric used in the ultrasonic welding device 1 according to the present invention is, for example, a chemical fiber fabric for producing safety protective clothing, and a multi-layer material composed of other materials is also possible. In this case, however, the fusion portions of both fabrics of the portion to be bonded should be composed of chemical fibers, so there should be no problem in fusion.

In general, the material of the fabric that can be used is polyolefin, polyester, nylon, PVC, etc., the thickness is designed to use both the woven fabric and the Fuji fabric can be used up to 0.5 ~ 20 mm, but the present invention is not limited thereto. Do not.

Two pieces of fabric are usually supplied, and two pieces of fabric are connected to each other to sew.

The ultrasonic welding device 1 according to the present invention includes a frame 5 constituting a support structure, and presses a pressure roller 12 for pressing a plurality of sewing fabrics c1 and c2 supplied onto the frame 5. It has a fabric pressing portion 10 provided.

The far-end pressing unit 10 is located on the upper side of the frame 5 forming a plane, and includes a driving motor 14 for rotating the pressing roller 12, and a rotational force of the driving motor 14. Is transmitted to the pressure roller 12 through the universal joint 16 is configured to be raised and lowered during rotation.

The distal pressing portion 10 has a drive motor 14 fixed to the lower surface of the frame 5, and the rotating shaft 14a of the motor 14 has a plurality of timing gears 18a and a plurality of timing belts. It is connected to the upper side of the frame (5b) through the 18b and the shaft (18c) to enable power transmission, and extends through the universal joint (16) in the middle of the shaft (18c) to rotate the pressure roller 12 Is connected to.

The plurality of timing gears 18a, the plurality of timing belts 18b, the shafts 18c, and the universal joints 16 are embedded through the inside of the casing 20 disposed on the upper side of the frame 5. Protected from external shocks and foreign objects.

The universal joint 16 is configured so that the pressure roller 12 can be moved up and down by the height adjustment unit 70 to be described later, it is a conventional structure including a plurality of joints.

In addition, the drive motor 14 for rotating the pressing roller 12 of the distal pressing portion 10, as shown in Figure 2, to rotate the drive roller 32 of the discharging portion 30 will be described later And another timing gear 34a, timing belt 34b and shafts 34c.

The timing gear 34a, the timing belt 34b, and the shafts 34c for rotating the driving roller 32 of the original fabric discharge part 30 rotate the pressure rollers 12 of the original fabric pressing part 10. And a plurality of timing gears 18a and a plurality of timing belts 18b and shafts 18c for the same rotational speed.

That is, as shown in FIG. 2 by the one drive motor 14, a plurality of timing gears 18a and a plurality of timing belts 18b for rotating the pressing rollers 12 of the far-end pressing unit 10. ) And the shaft 18c and another timing gear 34a, the timing belt 34b and the shaft 34c are rotated at the same time to rotate the drive roller 32 of the discharging portion 30. .

Therefore, since the driving roller 32 of the discharging part 30 has the same diameter as the pressing roller 12 of the discharging part 10, it can be rotated at the same circumferential speed.

Meanwhile, the pressing roller 12 of the distal pressing portion 10 has a central axis 22 formed at the center of the pressing roller 12 and the bearing B as shown in an enlarged view in FIGS. 3 and 4. It is mounted to the roll case 24 through the rotatable. In addition, another timing gear 18a and a timing belt 18b are formed and rotated on one side of the central shaft 22, and a pattern surface 26 having an enlarged diameter is formed on the other side thereof.

The pattern surface 26 is a portion for melting and adhesively molding the overlapped portions of the fabrics c1 and c2 together with the tool horn 42 of the ultrasonic generator 40 described later. The pattern surface 26 may be formed in various ways to design the fabrics c1 and c2 into various types of patterns.

The pattern surface 26 is molded so that the upper and lower portions of the bonded portions of the fabrics c1 and c2 do not penetrate each other and are completely bonded. In the case of safety protective clothing, the chemicals and the like do not penetrate into the portions connecting the fabrics (c1) and (c2). The fusion is completed by the pattern surface 26 serves to block the toxic substances that can penetrate into the liquid or gas state while maintaining sufficient tensile strength.

Therefore, the pattern surface 26 can be imprinted with a pattern in a variety of designs according to the purpose, because the pressure is applied to the molten chemical fiber fabric (c1) (c2) portion to pass through to increase the tensile strength and fusion It forms a hermetic seal to block the toxic substances that can penetrate into the liquid or gaseous state.

The present invention has a tool horn 42 disposed opposite to the pressure roller 12 to transmit ultrasonic waves to the sewing fabrics c1 and c2 and to melt-bond the overlapped portions of the fabrics c1 and c2. The ultrasonic generator 40 is provided. The tool horn 42 of the ultrasonic generator 40 has a booster 44 and a vibrator 46 connected to the lower side thereof, and the tool horn 42 and the booster at the lower end of the vibrator 46. A bearing B is mounted to allow the 44 and the vibrators 46 to be rotatable, and includes a power connection 50 to which the power is supplied.

The power connection unit 50 has an electrode ring 52 mounted on the lower end of the vibrator 46 and carbon for supplying power to the electrode ring 52 so that power can be supplied during rotation of the vibrator 46. Electrode 54.

The tool horn 42 of the ultrasonic generator 40 as described above is rotatable and the part of the booster 44 in the middle thereof is operatively connected to the rotary motor 56 through the belt 58a and the pulleys 58b. If necessary, the tool horn 42 is rotated by the operation of the rotary motor 56 so that the upper surface of the tool horn (c2) can change the position of the upper surface of the tool horn (42) This is to be worn uniformly, it is configured to be able to change the position facing the pressure roller 12.

In addition, the present invention further includes a cooling fan 60 for removing heat generated during operation of the ultrasonic generator 40. The cooling fan 60 is arranged to operate in conjunction with the ultrasonic generator 40 when it operates. As illustrated in FIG. 2, the cooling fan 60 is connected to the tool horn 42, the booster 44, and the vibrators 46. It is arranged to supply external cold air.

In addition, the present invention includes a drive cylinder 72 for raising and lowering the far-end pressing part 10 up and down, and has a height adjusting part 70 for adjusting the pressing force of the pressing roller 12.

The height adjusting part 70 is a drive cylinder 72 is mounted on the upper end of one side of the casing 20 fixed on the frame 5, the rod 72a of the drive cylinder 72 extends downward It is connected to the roll case 24 to which the pressure roller 12 is mounted.

In addition, the driving cylinder 72 of the height adjusting unit 70 is formed of a pneumatic cylinder, and an external pneumatic source (not shown) through the pneumatic regulator 74 and the solenoid valve 76 positioned at the lower portion of the frame 5. , For example, an air compressor.

Accordingly, the drive cylinder 72 is configured to raise and lower the rod 72a through pneumatic control by the solenoid valve 76.

In addition, the height adjusting unit 70 further includes a pressing force adjusting unit 80 that controls the lowering position of the pressure roller 12 by controlling the lowering of the rod 72a on the upper end of the driving cylinder 72.

The pressing force adjusting unit 80 includes a stopper 82 screwed to an upper end of the rod 72a, and by adjusting the screwing position of the stopper 82 with respect to the rod 72a. The displacement that the driving cylinder 72 can push the rod 72a downwards can be adjusted, and as a result, the pressure roller 12 connected to the rod 72a is displaced between the tool horn 42 and the tool horn 42. c1) (c2) is to be able to adjust the force to press.

Ultrasonic fusion according to the present invention is adjusted to vary the pressure to be pressed in accordance with the thickness of the fabric (c1) (c2) in order to achieve the optimal fusion because the degree of fusion varies depending on the thickness of the fabric (c1) (c2) You must do it. To this end is provided with a pressing force adjustment unit (80).

The height adjustment unit 70 is a pressure provided from the pneumatic source is applied to the pressure of 3 ~ 4.5 bar for the paper cloth, 5 ~ 6.5 bar for the Fuji fabric. The thickness of the fabrics (c1) and (c2) used is generally 0.5 to 20 mm and the height at which ultrasonic welding can occur most is the speed of welding and the type of material of the fabrics (c1) and (c2), and the oscillation in the ultrasonic vibrator 46. It may vary depending on the amount of energy to be generally 0.5 to 10 mm is preferred, but is not limited thereto.

Therefore, the pressure roller 12 is raised and lowered by the driving cylinder 72, the pressing force is adjusted by the pressing force adjusting unit 80 to compress the fabric (c1) (c2) at a constant pressure.

In addition, the present invention is a drive roller 32 for drawing out the fabric (c1) (c2) sewn through the pressing roller 12 of the fabric pressing portion 10 and the tool horn 42 of the ultrasonic generator 40. ) And a discharging portion 30 having a supporting roller 36. The discharging portion 30 is that the support roller 36 is elastically supported toward the drive roller 32 by the spring 38, which is shown in detail in Figs.

The discharging part 30 has elastic force adjusting means 90 for adjusting the pressing force of the spring 38 of the support roller 36, the elastic force adjusting means 90 is screwed to the upper end of the support roller 36 Double nut 92 and a support 94 on which the double nut 92 is supported.

The holder 94 is connected to the rear side of the casing 20 on which the distal pressing portion 10 is mounted inclined through the bolts 96, and has a substantially ⊂-shaped cross-sectional structure.

The double nut 92 is screwed to an upper end of the support shaft 98 that vertically penetrates the holder 94 at the upper outer side of the holder 94.

A connecting rod 102 is mounted on the supporting shaft 98, and a spring 38 is interposed between the connecting table 102 and an upper portion of the fixing table 94 to support the supporting shaft 98 through the connecting table 102. ) And the support roller 36 at the bottom thereof are always elastically supported to the lower side.

In such a structure, the double nut 92 can adjust the length of the spring 38 by adjusting the screwing depth with the support shaft 98, and consequently, can adjust the elastic force of the spring 38, It is possible to adjust the action force that the support roller 36 is pressed to the drive roller 32 of the lower side.

In addition, the present invention, the discharging portion 30 is provided with a handle 106 and an eccentric disc 108 for raising the support roller 36 from the drive roller 32 to form a gap therebetween.

The handle 106 is rotated by the user to form a gap between the support roller 36 and the drive roller 32, and through the gap between the sewn chemical fiber fabric (c1) (c2) and then the handle 106 Release the fabric (c1) (c2) to engage between them.

The handle 106 is connected to the eccentric disc 108, the eccentric disc 108 is mounted in an eccentric cam method, when rotating by the handle 106, to press the spring 38 Lifting the projection (102a) of the connecting table 102 is a structure to raise the support roller 36 fixed to the lower end of the connecting table 102.

Accordingly, the support roller 36 is vertically movable by the handle 106 between the lowered state and the raised state as shown by the solid line as shown by the dotted line in FIG. 6.

In addition, the present invention transmits a driving force to the pressure roller 12 and the driving roller 32 of the discharging portion 30 of the discharging portion 10, the tool horn 42 of the ultrasonic generator 40 It includes a footrest portion 120 is built in the switches to operate the drive cylinder 72 of the height adjustment portion 70. The scaffolding unit 120 is formed of a conventional foot switch. When the user steps on the scaffolding unit 120, built-in switches (not shown) operate to drive the motor 14 of the fabric pressing unit 10. Rotate the drive roller 32 of the pressure roller 12 and the fabric discharge unit 30 by operating the power supply, supplying power to the ultrasonic generator 40 to oscillate ultrasonic waves through the tool horn 42, Pneumatic pressure is transmitted to the driving cylinder 72 of the height adjusting part 70 to lower the pressure roller 12 to thereby sew the chemical fiber fabrics c1 and c2.

And the present invention preferably further includes a fabric supply unit 130 for supplying a plurality of sewing fabric (c1) (c2) on the sewing surface of the frame (5). 5 and 7, the fabric supply unit 130 supplies the fabrics c1 and c2 to the sewing surface of the frame 5 through different paths. Supply reels (132) arranged for each path on the phase.

Through these supply reels 132 the chemical fiber fabric (c1) (c2) can be freely supplied between the pressure roller 12 and the tool horn 42, the support roller 36 and the drive roller 32 It is towed between and can be pulled out smoothly after sewing.

Of course, the chemical fiber fabric (c1) (c2) may be disposed on the supply reel 132, respectively, but the present invention is not limited thereto, and a film or various papers forming a sewing operation may be wound and mounted in a roll form. have.

And the present invention is the side end so that the fabric (c1) (c2) can be supplied to the correct position between the pressure roller 12 of the fabric pressing portion 10 and the tool horn 42 of the ultrasonic generator 40 It may further include a guide 140 bent toward the tool horn 42 of the pressing roller 12 and the ultrasonic generator 40 of the distal pressing portion 10.

As shown in FIG. 5, the guide 140 may have a structure that is fixedly attached to the rear surface of the casing 20, and the lower end of the guide 140 may be bent to be disposed between the pressure roller 12 and the tool horn 42. (c1) and (c2) may be disposed to face. In addition, such a guide 140 may be mounted on the rear side of the upper surface of the frame 5, the present invention is not particularly limited to the mounting position or number, if necessary, is mounted in a desired position chemical fiber fabric (c1) (c2) can be guided to the correct position.

Reference numeral 140 is a switch board, which controls the energy supplied from the outside related to the operation of the present invention, such as an operation switch 142 for operating a pneumatic source, an electrical switch 144 for controlling the main power on / off. Various switches are installed. Also, 150 facilitates initial driving of the pressure roller 12 as a head handle handle, and 160 is an ultrasonic oscillator that provides ultrasonic waves to the vibrator 46.

Ultrasonic fusion apparatus 1 according to the present invention configured as described above is provided with a chemical fiber fabric (c1) (c2) in the form of a roll from the fabric supply unit 130, or separately from each of the sheet-like fabric (c1) c2 are overlapped in plural to enter between the pressing roller 12 and the tool horn 42.

In this case, when the user steps on the scaffolding unit 120, the built-in foot switch (not shown) operates to operate the driving motor 14 of the fabric pressing unit 10 to pressurize the roller 12 and the fabric discharge unit. The driving roller 32 of the 30 is rotated, and power is supplied to the ultrasonic generator 40 so that ultrasonic waves are oscillated through the tool horn 42. In addition, the pneumatic pressure is transmitted to the driving cylinder 72 of the height adjusting part 70 to lower the pressure roller 12 so as to be in close contact with the tool horn 42 and to sew the chemical fiber fabrics c1 and c2. do.

In this state, the user lifts the handle 106 of the discharging part 30, and accordingly, an eccentric eccentric disc 108 fixed to the handle 106 and one side of the connecting table 102. As shown by the solid line in FIG. 6 through the provided projection 102a, the ends of the fabrics c1 and c2 sewn between the support roller 36 and the driving roller 32 are raised. Once positioned, the handle 106 is released and the support roller 36 descends as shown by the dashed line to bite the fabrics c1 and c2 therebetween.

In this state, when the footrest part 120 is continuously pressed, the pressure roller 12 of the fabric pressing part 10 and the driving roller 32 of the fabric discharging part 30 are continuously rotated, and the ultrasonic generator 40 has AC. The 220 V (50 ~ 60 Hz) is converted into electrical energy of 15 ~ 50 KHz and transmitted to the vibrator (46). The electrical energy supplied transducer 46 converts it into mechanical vibration energy and transmits it to the booster 44 and the tool-horn 42. At this time, while the amplitude enlargement is adjusted and pressurized, the ultrasonic energy generates a frictional heat instantaneously to the thermoplastic material and a strong molecular bond is made between the pressure roller 12.

As such, the vibration frequency (vibration energy) generated in the tool horn 42 is moved to the pressure roller 12 located above the tool horn 42, and the tool horn 42 and the pressure roller 12 are made of respective materials. And because the movement range of the vibration frequency is different depending on the mechanical characteristics, high heat is generated by the vibration friction heat coming from the difference of the movement range of the vibration frequency in the contact surface of the tool horn 42 and the pressure roller 12. At this time, the fabric (c1) (c2) located between the tool horn 42 and the pressure roller 12 is melt-bonded by the vibration friction heat.

The tool horn 42 is in the shape of a circular dish and, if necessary, is rotated at a constant speed if necessary by the rotary motor 56 to prevent the thermoplastic material from sticking to the disc by molecular bonding.

In addition, the rotary motor 56 capable of rotating the tool horn 42 of the ultrasonic generator 40 may be rotated if necessary by the user, so that the upper surface of the tool horn 42 may be distal (c1) ( The position at which c2) is supported is changed so that if the top face of the tool horn 42 is worn by use, its wear is even.

As shown in FIG. 7 through the above process, the plurality of sewing fabrics c1 and c2 are press rollers 12 of the fabric pressing portion 10 and the tool horn 42 of the ultrasonic generator 40. It passes through, and passes between the driving roller 32 and the support rollers 36 of the fabric discharge portion 30 is bonded in a continuous sewing state.

Figure 8 shows the appearance of the chemical fiber fabric (c1) (c2) sewn by the present invention.

As described above, according to the present invention, it is possible to achieve a good quality sewing operation in which airtightness is perfectly maintained in the seam portion S without generating seam puckering through ultrasonic welding.

After the sewing operation is completed, when the user releases the state of pressing the scaffolding unit 120, the operation of the driving motor 14 of the fabric pressing unit 10 is stopped to press the roller 12 and the fabric discharge unit 30. To stop the rotation of the driving roller 32, stop the operation of the ultrasonic generator 40, and transfer the pneumatic pressure to the drive cylinder 72 of the height adjustment unit 70 to raise the pressure roller 12 and the tool After separating from the horn 42 side, the sewing operation is completed.

Although the present invention has been described in detail with reference to the accompanying drawings, the present invention is not limited to such a specific structure. Those skilled in the art may variously modify or change the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. For example, the specifications of main components such as drive motors, drive cylinders, springs, etc. may all be set differently in consideration of the processing capacity of the entire apparatus. It is of course also possible to substitute other structures of equal function for the power transmission system from the drive motor. Nevertheless, such simple design modifications or variations will be made clear in advance that all obviously fall within the scope of the present invention.

According to the present invention as described above, if you want to sew a chemical fiber fabric used in safety protective clothing, etc., it is possible to completely solve the problem that the pucking (seam puckering) occurs through the ultrasonic welding is poor sewing process. Therefore, a good quality sewing work can be achieved in which the airtightness is perfectly maintained at the ridges.

In addition, according to the present invention, it is possible to achieve a sewing operation while maintaining airtightness in the part easily, a useful effect that can greatly improve the productivity of the sewing work while reducing the specific gravity of labor costs.

Claims (14)

In the apparatus for sewing and bonding the chemical fiber fabric using ultrasonic welding, A frame constituting the support structure; A fabric pressing portion provided with a pressing roller for pressing a plurality of sewing fabrics supplied onto the frame; An ultrasonic generator having a tool horn disposed to face the pressure roller to transmit ultrasonic waves to the sewing fabric and to melt-bond the overlapped portions of the fabric; A height adjusting part having a driving cylinder for raising and lowering the far-end pressing part and adjusting the pressing force of the roller; A fabric discharge part including a driving roller and a support roller for drawing the sewing fabric passing through the pressure roller of the fabric pressing part and the tool horn of the ultrasonic wave generating part; And And a scaffolding unit having a built-in switch for transmitting a driving force to the pressure roller of the fabric pressing unit and the driving roller of the fabric discharge unit, operating a tool horn of the ultrasonic wave generating unit, and operating a driving cylinder of the height adjusting unit. The distal end pressing unit includes a driving motor for rotating the pressing roller, and the rotational force of the driving motor is configured to be raised and lowered during the rotation of the roller by being transmitted to the pressing roller through a universal joint. . According to claim 1, Ultrasonic welding device characterized in that it further comprises a fabric supply unit for supplying a plurality of sewing fabrics on the sewing surface of the frame. The ultrasonic welding apparatus according to claim 2, wherein the fabric supply unit has supply reels arranged for each path on the frame such that the fabrics are supplied through different paths on the sewing surface of the frame. Device. According to claim 1, wherein the side end is bent toward the tool horn between the pressing roller and the ultrasonic generator of the ultrasonic pressure generator so that the far end is supplied to the correct position between the pressing roller of the distal pressing portion and the tool horn of the ultrasonic generator. Ultrasonic welding device characterized in that it further comprises a guide. delete The tool horn of claim 1, wherein the tool horn of the ultrasonic generator is rotatable by connecting a booster portion connected to a lower portion of the ultrasonic generator through a belt and a pulley, and allowing the tool horn to be rotated by the operation of the rotary motor. Ultrasonic welding device, characterized in that configured to change the position of the upper surface of the tool horn supporting the fabric. The ultrasonic welding apparatus according to claim 1, wherein the driving roller of the discharging part is connected to and interlocked with a driving motor for rotating the pressing roller of the discharging part. The ultrasonic welding device according to claim 7, wherein the driving roller of the discharging part has the same diameter as the pressing roller of the discharging part and has the same circumferential speed. The ultrasonic welding device according to claim 1, wherein the support roller of the fabric discharge part is elastically supported toward the driving roller by a spring. 10. The method of claim 9, wherein the discharging portion is provided with an elastic force adjusting means for adjusting the spring pressing force of the support roller, the elastic force adjusting means includes a double nut screwed to the upper end of the support roller, and the support for supporting the double nut Ultrasonic welding device characterized in that. 11. The method according to claim 9 or 10, wherein the discharging portion has a handle for lifting the support roller from the drive roller, the handle is raised by the projection of the connecting rod for the eccentric eccentric disc to press the spring Ultrasonic welding device, characterized in that for raising the support roller fixed to the lower end of the rotatable. The ultrasonic welding device according to claim 1, wherein the driving cylinder of the height adjustment part is made of a pneumatic cylinder. The method of claim 12, wherein the height adjusting portion further comprises a pressing force adjusting portion for adjusting the lowering position of the pressure roller by controlling the lowering of the rod on the top of the drive cylinder, the pressing force adjusting portion screwed to the top of the rod stopper ( Ultrasonic welding device characterized in that it further comprises a stopper. The ultrasonic welding apparatus according to claim 1, further comprising a cooling fan for removing heat generated during operation of the ultrasonic generator.

Images