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WO2025127574A1 - Machine de soudage pour résine synthétique - Google Patents

Machine de soudage pour résine synthétique Download PDF

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Publication number
WO2025127574A1
WO2025127574A1 PCT/KR2024/019564 KR2024019564W WO2025127574A1 WO 2025127574 A1 WO2025127574 A1 WO 2025127574A1 KR 2024019564 W KR2024019564 W KR 2024019564W WO 2025127574 A1 WO2025127574 A1 WO 2025127574A1
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WO
WIPO (PCT)
Prior art keywords
roller
fabric
entry
discharge
guide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/KR2024/019564
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English (en)
Korean (ko)
Inventor
서기원
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO2025127574A1 publication Critical patent/WO2025127574A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus

Definitions

  • the present invention relates to a synthetic resin welding machine, and more specifically, to a synthetic resin welding machine that enables welding using hot air and ultrasonic vibration energy, while allowing smooth entry and exit of fabric between an upper welding roller made of metal and a lower ultrasonic horn.
  • Fabrics for various types of clothing, etc. are usually required to have a basic waterproof function, and are produced using waterproof fabrics that have a waterproof function.
  • fabrics that require waterproofing are manufactured using the above-mentioned waterproof fabrics so that they faithfully perform their original function while also allowing protection against rainy weather due to their waterproof function.
  • the waterproof fabrics as described above can secure their waterproof properties by joining them together through welding, and among the welding methods, the heat welding method is mainly used.
  • thermo welding methods hot air, ultrasonic, high-frequency, rotation, and vibration welding methods are being applied as thermal welding methods.
  • hot air welding is mainly used to bond waterproof tape to the sewing part of fabric.
  • High temperature hot air is applied to the waterproof tape to melt it to a predetermined degree, and at the same time, the waterproof tape is bonded to the sewing part of the fabric and passed between upper and lower rollers made of rubber.
  • the hot air welding method described above is one in which high-temperature hot air is discharged over a relatively large area, and although it was possible to melt and bond relatively thin waterproof tapes, there was a serious problem in that, when thick fabrics such as tents were overlapped and bonded, the waterproof coating surface around the bonding surface of the fabrics burned and peeled off due to excessive hot air.
  • an ultrasonic welding method in which ultrasonic vibration energy is transmitted to the welding material through an ultrasonic horn, causing a momentary frictional heat to be generated at the joint surface of the welding material between the upper welding roller and the welding material, thereby melting and bonding the synthetic resin to form a strong molecular bond.
  • the conventional welding method using a welding roller and an ultrasonic horn as described above has a problem in that the welding wheel and the ultrasonic horn are both made of metal, and when a strong fabric enters, the frictional force is reduced, causing the fabric to slip, making it difficult to properly enter and discharge the fabric, and this has caused a serious problem in that uniform welding work cannot be performed.
  • Patent Document 1 Republic of Korea Registered Patent No. 10-2088557.
  • Patent Document 2 Republic of Korea Registered Patent No. 10-2405061.
  • the present invention has been made to solve the above-mentioned problems, and the purpose of the present invention is to provide a synthetic resin welding machine that enables uniform welding work by configuring an entry friction roller made of a rubber material that rises and falls from the bottom to the top of a worktable, thereby allowing the welding roller to descend to grab the fabric and, during the rotation process, providing frictional force with the entry friction roller to facilitate the entry and discharge of strong fabric.
  • the purpose of the present invention is to provide a synthetic resin welding machine that configures a discharge guide roller and a friction roller made of rubber having frictional force with the discharge guide roller at the rear of a worktable, thereby pulling the fabric from the rear during the process of discharging the fabric to enable smooth discharge.
  • a main body is formed with a work table formed with a horn extraction hole and a fabric support bar on one side of the middle portion, and a support arm formed with a horizontal protrusion toward the upper portion of the work table and an upper guide formed at the front to guide the entry of the fabric from the upper portion;
  • a hot air generating means formed on the above-mentioned elevator and having a heater rod that rotates left and right;
  • An ultrasonic generator formed at the bottom of the work table and comprising an ultrasonic horn and a housing that are pulled out to the top of the work table through a vibrator, a booster, and a horn extraction hole, and that is installed on the bottom of the work table to apply and generate ultrasonic vibration energy in a vertical rotational force;
  • a rotary driving means formed on the bottom surface of the above worktable comprising a driving motor and a rotary shaft, the rotary shaft being connected to the ultrasonic generator by a belt pulley to provide rotary force to the ultrasonic generator;
  • An entry guide means that operates by forming and releasing holes in the lower part of the work table and applying rotational frictional force to the welding roller to control the entry and exit of the fabric;
  • It is configured to include a discharge guide means formed on the work table and support arm at the rear side of the work table and provides discharge force to the fabric discharged to the rear.
  • the above entry guide means is,
  • Installation bracket formed to be fixed to the bottom of the workbench
  • a pivot member that is hingedly connected to the lower part of the above-mentioned installation bracket and rotates;
  • a cylinder formed vertically on the above installation bracket, the cylinder rod being connected to the middle of the above rotary table to rotate the front of the rotary table up and down;
  • a pair of roller mounting bars on both sides one end of which is connected to both sides of the pivot table, the other end of which protrudes toward the horn extraction hole, and which rotates up and down by the rotational operation of the pivot table;
  • An entry friction roller made of rubber and mounted on each of the roller mounting bars;
  • It is configured to include a stroke adjustment bolt that is vertically screwed to the above installation bracket and is supported on the upper part of the rotation table when the rotation table is operated to adjust the rotation angle.
  • the synthetic resin welding machine of the present invention is configured with an entry friction roller that rotates up and down on both sides of a lower ultrasonic horn, so that when a high-quality fabric is entered, smooth entry is possible due to rotational friction between the upper welding roller and the entry friction roller, and thus, an effect of uniform welding work can be obtained.
  • Figure 1 is a perspective view of a synthetic resin welding machine of the present invention.
  • Figure 2 is a rear perspective view of the synthetic resin welding machine of the present invention.
  • Figure 3 is a perspective view of the main parts of the synthetic resin welding machine of the present invention.
  • Figure 5 is a side view showing the interior of a synthetic resin welding machine of the present invention.
  • Figure 6 is a schematic diagram showing the inside of a synthetic resin welding machine of the present invention.
  • Figure 7 is a schematic diagram showing a fabric guide means of a synthetic resin welding machine of the present invention.
  • Figure 8 is a main part diagram of the cooling section of the synthetic resin welding machine of the present invention.
  • Figure 9 is a schematic diagram showing an entry guide means of a synthetic resin welding machine of the present invention.
  • Figure 10 is a schematic diagram showing a discharge guide means of a synthetic resin welding machine of the present invention.
  • Figure 11 is a diagram showing the state of the raw material entering the synthetic resin welding machine of the present invention.
  • Figure 12 is a diagram showing the fabric welding state of the synthetic resin welding machine of the present invention.
  • Figure 13 is a diagram showing the state of the raw material discharge of the synthetic resin welding machine of the present invention.
  • Body 110 Workbench
  • Control block 134 Upper fabric entry point
  • Hot air generating means 310 Heater rod
  • Ultrasonic generator 410 Vibrator
  • Moving Guide Home 620 Lower Fabric Entry Platform
  • Entry guide means 710 Installation bracket
  • Discharge guide means 810 Discharge guide roller
  • FIG. 1 is a perspective view of a synthetic resin welder of the present invention
  • FIG. 2 is a rear perspective view of the synthetic resin welder of the present invention
  • FIG. 3 is a perspective view of a main part of the synthetic resin welder of the present invention
  • FIG. 4 is a rear perspective view of a main part of the synthetic resin welder of the present invention
  • FIG. 5 is a side view of a main part showing the inside of the synthetic resin welder of the present invention
  • FIG. 6 is a perspective view of a main part showing the inside of the synthetic resin welder of the present invention.
  • the synthetic resin welding machine (1) of the present invention is composed of a main body (100), a platform (200), a hot air generating means (300), an ultrasonic generator (400), a rotation driving means (500), a lower guide (600), an entry guide means (700), and an exhaust guide means (800).
  • the main body (100) is configured to form the basis for configuring the synthetic resin welding machine (1) of the present invention, and various systems are constructed and configured to form a vertical body shape.
  • the main body (100) is configured with a work table (110) to enable work to be performed.
  • the work table (110) is configured in a plate shape and is configured to be installed horizontally on one side of the main body (100).
  • a horn extraction hole (111) is formed through the work table (110) to enable protrusion of an ultrasonic horn (430) of an ultrasonic generator (400) described later.
  • the main body (100) is configured with a support arm (120) that is configured to protrude horizontally from the upper portion to the upper portion of the work table (110).
  • the support arm (120) is configured in a box shape, and a typical operation panel, etc. are constructed.
  • the support arm (120) is provided with an upper guide (130) that guides the entry of the upper fabric to be welded.
  • the upper guide (130) is first configured with a support member (131) in the form of a bent bar that protrudes downward and is horizontally bent from the front of the support arm (120).
  • the upper guide (130) is configured to have an extension (132) coupled to the end of the support (131), and the extension (132) is configured to be fastened to the support (131) via a bolt (B) through an adjustment block (133), and is configured to form a bent bar shape that protrudes downward and has a lower end that is bent horizontally, and is configured to be able to control left and right movement on the support (131) by adjusting the fastening of the bolt (B).
  • the upper guide (130) is provided with an upper fabric entry member (134), and the upper fabric entry member (300) is mounted in a bent horizontal position of the extension member (132), but is provided with an upper fabric entry groove (213) that is open to the front, back, and one side (right side in the drawing).
  • the above-mentioned elevator (200) is configured to pressurize and release the fabric by an up-and-down lifting operation in configuring the synthetic resin welding machine (1) of the present invention.
  • a lift platform (200) is formed at the end of the support arm (120) and is configured to move up and down along an LM guide (not shown in the drawing) by a conventional cylinder (not shown in the drawing) or the like.
  • the elevator (200) is provided with a metal welding roller (210) that rotates by a conventional motor (not shown in the drawing) at the bottom thereof.
  • the welding roller (210) is provided with a conventional knurling treatment on the surface to prevent slipping with the fabric.
  • the above hot air generating means (300) is configured to provide hot air necessary for welding work when configuring the hot air and ultrasonic combined synthetic resin welding machine (1) of the present invention.
  • the hot air generating means (300) is not newly implemented, but is a conventional hot air generating means (300).
  • a heater rod (310) is formed on the elevator (200) to enable left-right rotation through a separate rotation means (not shown in the drawing), and a hot air nozzle (311) is configured at the bottom of the heater rod (310) to enable hot air discharge.
  • the above ultrasonic generator (400) is configured to generate ultrasonic vibration energy for providing frictional heat when configuring the synthetic resin welding machine (1) of the present invention.
  • the ultrasonic generator (400) is configured such that a conventional vibrator (410) and a booster (420) are formed horizontally, and an ultrasonic horn (430) in the form of a circular plate having a thickness corresponding to the welding area is vertically formed at the end of the booster (420), and the vibrator (410) and the booster (420) are configured to be surrounded by a housing (440).
  • the synthetic resin welding machine (1) of the present invention may further include a cooling unit (1000) that cools the ultrasonic horn (430) of the ultrasonic generator (400).
  • the cooling unit (1000) is configured with an air supply pipe (1010) that can supply air to the synthetic resin welding machine (1) of the present invention, and the air supply pipe (1010) is configured to be fixed to the lower part of the work table (110).
  • the air supplied to the air supply pipe (1010) in the present invention may be supplied through a conventional air supply device (not shown in the drawing) such as a compressor that is separately provided with the synthetic resin welding machine (1) of the present invention, although not shown in the drawing.
  • a conventional air supply device such as a compressor that is separately provided with the synthetic resin welding machine (1) of the present invention, although not shown in the drawing.
  • the cooling unit (1000) is configured with an air distribution pipe (1020) capable of dispersing air supplied through the air supply pipe (1010).
  • the air distribution pipe (1020) is configured to extend vertically from an end of the air supply pipe (1010) in an “L” shape and is configured to be spaced apart from one side of the ultrasonic horn (430).
  • a plurality of air discharge holes (1021)(1021') are configured to discharge air so that air can be discharged to the side of the ultrasonic horn (430) to cool the ultrasonic horn (330).
  • the above-mentioned rotary driving means (500) is configured to control the rotation of the ultrasonic generator (400) and the discharge guide means (800) described later when forming the synthetic resin welding machine (1) of the present invention.
  • the rotary driving means (500) is first configured with a driving motor (510), and the driving motor (510) is configured to be mounted parallel to the ultrasonic generator (400) at the rear of the bottom surface of the work table (110).
  • the rotary drive means (500) is configured with a rotary shaft (520), and the rotary shaft (520) is connected to the driving motor (510) to have rotary force, and is configured to be installed on a work table (110).
  • the driving motor (510) is configured to provide rotational power to the ultrasonic generator (400), and this is because the rotation shaft (520) is connected to the housing (440) of the ultrasonic generator (400) by a belt pulley (521), so that when the rotation shaft (520) rotates, the ultrasonic generator (400) can be rotated in a vertical direction.
  • the above lower guide (600) is configured to guide the entry of the fabric from the bottom when entering the synthetic resin welding machine of the present invention for welding work, and is configured to be located below the upper guide (130).
  • the entry guide means (700) is first configured with an installation bracket (710), and the installation bracket (710) is configured to be bent in an “ ⁇ ” shape and mounted on the front lower portion of the work table (110).
  • the cylinder rod (831) is configured such that its lower end is connected to the rotary shaft (820) through a connecting member (832), and is configured to prevent the forward and reverse rotation of the rotary shaft (820) during the launching operation.
  • the discharge guide means (800) is configured with a rotary friction means (840) that interferes with the discharge guide roller (810) to provide a rotary frictional force to enable smooth discharge of the fabric.
  • the rotary friction means (840) are configured in multiples with a set interval on the left and right.
  • the rotary friction means (840) is first configured with a connecting bracket (850), and the connecting bracket (850) has a form that is open toward the bottom, the rear end is fixedly mounted to the rotary shaft (820), and spring hooks (851) are configured to protrude on both sides of the front.
  • a mounting bar installation groove (852) is cut into the front of the connecting bracket (850) so that a roller mounting bar (860) described later can be mounted.
  • the rotary friction means (840) is configured with a roller mounting bar (860), and the roller mounting bar (860) is configured to have a front-back length, and its rear end is configured to be connected to an axis (861) in front of the connecting bracket (850) to rotate, while the front is configured to face downward.
  • roller mounting bar (860) has a spring connecting plate (862) corresponding to the spring hook (851) formed in the middle thereof.
  • roller mounting bar (860) is provided with a protruding catch (863) that catches the connecting bracket (850) at the upper rear portion thereof and prevents the lower rotation of the roller mounting bar (860).
  • the rotating friction means (840) is configured with a discharge friction roller (870).
  • the discharge friction roller (870) is configured with a rubber material to have frictional force, and is configured to be rotatably installed on the tip of the roller mounting bar (860).
  • the rotating friction means (840) is configured with a tension spring (880) that provides tension so that the front of the roller mounting bar (860) faces downward, and the tension spring (880) is configured to connect the spring hook (851) of the connecting bracket (850) and the spring connecting plate (862) of the roller mounting bar (860).
  • the discharge guide means (800) is configured such that the rotating shaft (820) rotates by the operation of the cylinder (830), and when the roller mounting bar (860) of the rotating friction means (840) rotates downward by the one-way rotation, the discharge friction roller (870) comes into contact with the discharge guide roller (810) and provides a rotational frictional force to the discharge guide roller (810).
  • the tension spring (880) is configured to provide tension so that the discharge friction roller (870) comes into contact with the discharge guide roller (810).
  • the synthetic resin welding machine (1) of the present invention enables smooth welding during the process of overlapping rigid fabrics and welding them with hot air and ultrasonic waves, and also facilitates entry and exit of the fabrics without slipping, while also enabling uniform welding work accordingly.
  • the fabric to be entered for welding operation is composed of an upper fabric (10) and a lower fabric (20).
  • the upper fabric (10) is guided into entry through an upper guide (130), and the lower fabric (20) is guided into entry through a lower guide (600).
  • the upper fabric (10) is inserted into the upper fabric entry groove (213) formed in the upper fabric entry plate (134) while being placed on the fabric support bar (112) and supported on one side before being inserted.
  • the lower fabric (20) is inserted into the lower fabric entry groove (621) formed in the lower fabric entry plate (620) and supported on one side so that it can be entered, so that the upper fabric (10) and the lower fabric (20) form a state where the vertical welding portions overlap.
  • the welding roller (210) and the ultrasonic horn (430) may not enter and exit properly due to a slipping phenomenon when working with strong fabrics due to the characteristics of being composed of metal.
  • the rubber entry friction roller (750) applies a predetermined amount of pressure to the bottom surface of the lower fabric (20), so that frictional force is applied to the lower fabric (20), enabling stable entry and rearward discharge of the welded upper and lower fabrics (10)(20).
  • the discharge guide roller (810) is configured to have the same rotational power as the ultrasonic generator (400) by the rotational driving means (500), so that when the upper and lower fabrics (10) (20) to be welded and discharged enter between the discharge guide roller (810) and the discharge friction roller (870), the upper and lower fabrics (10) (20) are pulled at the same speed as the welding speed and discharged to the rear.
  • the synthetic resin welding machine of the present invention enables stable entry and exit by applying rotational frictional force through the entry guide means and the exit guide means when welding a strong fabric, thereby enabling uniform welding during the welding of the fabric.
  • the present invention's synthetic resin welding machine comprises an entry friction roller that rotates up and down on both sides of a lower ultrasonic horn, so that when a rigid fabric enters, smooth entry is possible through rotational friction between the upper welding roller and the entry friction roller, and thus uniform welding work is possible.
  • a discharge guide roller and a friction roller are formed at the rear of a worktable, so that rotational friction that pulls from the rear is applied, thereby providing the effect of guiding the smooth discharge of the fabric.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)

Abstract

La présente invention concerne une machine de soudage pour une résine synthétique et, plus particulièrement, une machine de soudage pour résine synthétique, comprenant un rouleau à friction d'entrée qui fonctionne pour apparaître au-dessus d'une table de travail ou disparaître au-dessous et est constituée d'un matériau de caoutchouc, et un rouleau de soudage qui descend pour maintenir un tissu, le rouleau de soudage étant pourvu d'une force de frottement avec le rouleau à friction d'entrée dans un processus de rotation de celui-ci, de telle sorte qu'un travail de soudage uniforme, tel qu'un tissu constitué d'un matériau rigide est facilement introduit et évacué, est possible ; et comprenant également un rouleau de guidage de décharge et un rouleau à friction au niveau d'un côté arrière de la table de travail, le rouleau à friction ayant une force de frottement avec le rouleau de guidage de décharge et étant constitué d'un matériau de caoutchouc, le rouleau de guidage de décharge et le rouleau à friction tirant un tissu depuis le côté arrière dans un processus dans lequel le tissu est déchargé, pour permettre au tissu d'être déchargé sans à-coups.
PCT/KR2024/019564 2023-12-13 2024-12-03 Machine de soudage pour résine synthétique Pending WO2025127574A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020230180564A KR102701003B1 (ko) 2023-12-13 2023-12-13 합성수지용 용착기
KR10-2023-0180564 2023-12-13

Publications (1)

Publication Number Publication Date
WO2025127574A1 true WO2025127574A1 (fr) 2025-06-19

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PCT/KR2024/019564 Pending WO2025127574A1 (fr) 2023-12-13 2024-12-03 Machine de soudage pour résine synthétique

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WO (1) WO2025127574A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102701003B1 (ko) * 2023-12-13 2024-08-29 서기원 합성수지용 용착기

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100460988B1 (ko) * 2002-05-20 2004-12-29 서기원 합성수지용 열풍용착기의 히터부 결합구조
KR100797890B1 (ko) * 2007-01-30 2008-01-24 한국생산기술연구원 초음파 융착 장치
KR102088557B1 (ko) * 2017-12-11 2020-03-12 서한나 합성수지용 초음파 용착장치
JP2020054744A (ja) * 2018-10-04 2020-04-09 ユニ・チャーム株式会社 伸縮性シートの製造方法、伸縮性シートの製造装置、及び、伸縮性シート
KR102405061B1 (ko) * 2021-11-24 2022-06-02 서한나 합성수지용 용착기
KR102701003B1 (ko) * 2023-12-13 2024-08-29 서기원 합성수지용 용착기

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100460988B1 (ko) * 2002-05-20 2004-12-29 서기원 합성수지용 열풍용착기의 히터부 결합구조
KR100797890B1 (ko) * 2007-01-30 2008-01-24 한국생산기술연구원 초음파 융착 장치
KR102088557B1 (ko) * 2017-12-11 2020-03-12 서한나 합성수지용 초음파 용착장치
JP2020054744A (ja) * 2018-10-04 2020-04-09 ユニ・チャーム株式会社 伸縮性シートの製造方法、伸縮性シートの製造装置、及び、伸縮性シート
KR102405061B1 (ko) * 2021-11-24 2022-06-02 서한나 합성수지용 용착기
KR102701003B1 (ko) * 2023-12-13 2024-08-29 서기원 합성수지용 용착기

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