Ultrasonic welding equipment for sound insulation cotton of plastic part

Abstract

The utility model discloses plastic part sound insulation cotton ultrasonic welding equipment which comprises a mechanical arm and a plurality of mould positioning tables arranged on the periphery of the mechanical arm in the circumferential direction, a mould is placed on each mould positioning table, and an ultrasonic welding head assembly is installed at the tail end of the mechanical arm. Each mould comprises a mould bottom plate, a mould cover plate and at least one driving device, a profiling mould is arranged on the upper surface of each mould bottom plate, each profiling mould is composed of a plurality of supporting convex blocks formed on the upper surface of the corresponding mould bottom plate in a protruding mode, a plurality of pressing heads are arranged on the side, close to the corresponding mould bottom plate, of each mould cover plate, and a plurality of welding receding notches are formed in each mould cover plate. By adopting the ultrasonic welding equipment for the sound insulation cotton of the plastic part, the sound insulation cotton can be very closely attached to the upper surface of the plastic part through the pressure heads, so that the ultrasonic welding head assembly can reliably pre-position the sound insulation cotton on the surface of the plastic part, and the ultrasonic welding quality is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic welding, in particular to an ultrasonic welding device for sound insulation cotton of plastic parts. Background Art

[0002] A layer of sound insulation cotton needs to be formed on the surface of some plastic parts to achieve good sound insulation effect after installation. Please refer to the Chinese utility model patent with announcement number CN218640958U. In the past, sound insulation cotton was generally fixed on plastic parts by gluing.

[0003] However, as people's requirements for environmental protection are gradually increasing, in order to improve the environmental friendliness of parts, some factories have begun to use ultrasonic welding to fix the sound insulation cotton on the surface of plastic parts. At present, with the gradual improvement of the level of production automation, many factories have begun to use robotic arms to control ultrasonic welding heads to fix the sound insulation cotton on the surface of plastic parts. However, due to structural design problems, the existing jigs can only reliably position plastic parts, but cannot reliably pre-position the sound insulation cotton on the surface of plastic parts, resulting in poor quality of subsequent ultrasonic welding.

[0004] Solving the above problems has become a top priority. Utility Model Content

[0005] In order to solve the technical problem that the existing jig cannot reliably pre-position the sound insulation cotton on the surface of the plastic part, resulting in poor ultrasonic welding quality, the utility model provides an ultrasonic welding device for sound insulation cotton of plastic parts.

[0006] The technical solution is as follows:

[0007] The first aspect of the present application relates to an ultrasonic welding device for sound insulation cotton of plastic parts, comprising a mechanical arm and a plurality of jig positioning platforms circumferentially arranged around the mechanical arm, each jig is placed on the jig positioning platform, an ultrasonic welding head assembly is installed at the end of the mechanical arm, the jig comprises a jig bottom plate placed on the corresponding jig positioning platform in the horizontal direction, a jig cover plate that can be opened or covered on the jig bottom plate, and at least one driving device for driving the jig cover plate, the upper surface of the jig bottom plate is provided with a contoured membrane, the contoured membrane is composed of a plurality of supporting protrusions protruding from the upper surface of the jig bottom plate, a plurality of pressure heads are provided on the side of the jig cover plate close to the jig bottom plate, and a plurality of welding clearance gaps are opened on the jig cover plate;

[0008] When each driving device drives the mold cover plate to cover the mold bottom plate, each pressure head can press the sound insulation cotton onto the upper surface of the plastic part placed on each supporting protrusion, so that the robotic arm can drive the ultrasonic welding head assembly to pass through each welding clearance gap one by one and weld the sound insulation cotton to the upper surface of the plastic part.

[0009] By using the above-mentioned ultrasonic welding equipment for sound insulation cotton for plastic parts, the sound insulation cotton can be very closely attached to the upper surface of the plastic part through each pressure head, so that the ultrasonic welding head assembly can reliably pre-position the sound insulation cotton on the surface of the plastic part, greatly improving the quality of ultrasonic welding.

[0010] In some embodiments, one side outer edge of the tire cover plate is rotatably mounted on the corresponding outer edge of the tire base plate by at least one first hinge, the driving device is a flip cylinder, the cylinder body of the flip cylinder is rotatably mounted on the tire base plate by a second hinge, and the piston rod of the flip cylinder is rotatably mounted on the tire cover plate by a third hinge.

[0011] In some embodiments, at least two upwardly extending support seats are installed on the tire base plate. When each driving device drives the tire cover plate to cover the tire base plate, the outer edge of the tire cover plate away from the first hinge is supported on the upper end of each support seat.

[0012] In some embodiments, a buffer pad made of elastic rubber is installed on the upper end of each support seat and the outer end of each pressure head.

[0013] In some embodiments, the ultrasonic welding head assembly includes an assembly shell installed at the end of a robotic arm and two welding head brackets installed in the assembly shell through corresponding slide rails, and both welding head brackets are equipped with ultrasonic welding heads whose outer ends extend out of the assembly shell. Two bracket translation cylinders are installed in the assembly shell, each of which can drive the corresponding welding head bracket to slide along the corresponding slide rail.

[0014] In some embodiments, the tire positioning platform includes a bottom frame and a positioning platform top plate installed on the bottom frame in a horizontal direction, the positioning platform top plate is provided with two rows of side edge positioning rollers respectively adjacent to the outer edges on both sides in the length direction thereof and a plurality of supporting balls distributed between the two rows of side edge positioning rollers, the positioning platform top plate is provided with at least one positioning seat arranged adjacent to the outer edge on one side in the width direction thereof, the positioning platform top plate is provided with at least one positioning hole arranged adjacent to the outer edge on the other side in the width direction thereof, the outer edge on one side in the width direction of the tire bottom plate is recessed to form positioning grooves respectively matched with the corresponding positioning seats, and the tire bottom plate is provided with pin through holes respectively corresponding to the positioning holes;

[0015] When the tire base plate is supported on each supporting ball and the outer edges on both sides of the tire base plate in the length direction are respectively rolling supported on the corresponding side edge positioning rollers, the positioning seats can be respectively embedded in the corresponding positioning grooves, and the locking pin can pass through the pin through hole and the positioning hole in sequence, thereby locking the tire base plate on the top plate of the positioning platform.

[0016] In some embodiments, a safety enclosure is further included around the robot arm and each mold positioning platform, the safety enclosure is provided with door openings corresponding to each mold positioning platform, safety gratings are installed on both sides of each door opening, and lighting is installed above each door opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the ultrasonic welding equipment for plastic sound insulation cotton;

[0018] Figure 2 It is a schematic diagram of the coordination relationship between the robot arm and each mold positioning platform;

[0019] Figure 3 This is a schematic diagram of the mold in an open state without plastic parts placed therein;

[0020] Figure 4 It is a schematic diagram of a mold in a covered state with a plastic part placed thereon;

[0021] Figure 5 This is a schematic diagram of the ultrasonic welding head assembly after removing part of the assembly shell. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with embodiments and drawings.

[0023] like Figure 1-Figure 5 As shown, an ultrasonic welding device for sound insulation cotton of plastic parts mainly comprises a mechanical arm 1 and a plurality of mold positioning platforms 2, and each mold positioning platform 2 is circumferentially arranged around the mechanical arm 1.

[0024] A jig 3 is placed on each jig positioning platform 2, and the jig 3 is used to position the plastic parts and the sound insulation cotton placed on the plastic parts. An ultrasonic welding head assembly 4 is installed at the end of the robot arm 1, and the ultrasonic welding head assembly 4 can weld and fix the sound insulation cotton on the plastic parts.

[0025] Specifically, the jig 3 includes a jig base plate 3a, a jig cover plate 3b and a driving device 3c, wherein the jig base plate 3a is mounted on the corresponding jig positioning platform 2 in the horizontal direction, and the jig cover plate 3b can be opened or covered on the jig base plate 3a under the drive of each driving device 3c. A contoured fetal membrane is provided on the upper surface of the jig base plate 3a, and the contoured fetal membrane is composed of a plurality of supporting protrusions 3d protruding from the upper surface of the jig base plate 3a, and the plastic parts can be positioned on each supporting protrusion 3d. A plurality of pressure heads 3e are provided on the side of the jig cover plate 3b close to the jig base plate 3a, and a plurality of welding clearance notches 3b1 are provided on the jig cover plate 3b.

[0026] Therefore, when each driving device 3c drives the mold cover plate 3b to cover the mold bottom plate 3a, each pressing head 3e can press the sound insulation cotton onto the upper surface of the plastic part placed on each supporting protrusion 3d, so that the robot arm 1 can drive the ultrasonic welding head assembly 4 to pass through each welding clearance notch 3b1 one by one to weld the sound insulation cotton onto the upper surface of the plastic part.

[0027] That is: when the plastic part is positioned on each supporting protrusion 3d, the mold cover plate 3b is covered, and the sound insulation cotton can be very closely attached to the upper surface of the plastic part through each pressing head 3e, so that the ultrasonic welding head assembly 4 can reliably pre-position the sound insulation cotton on the surface of the plastic part, greatly improving the quality of ultrasonic welding.

[0028] See also Figure 3 The outer edge of one side of the mold cover plate 3b can be rotatably mounted on the corresponding outer edge of the mold base plate 3a through at least one first hinge 3f, and the driving device 3c is a flip cylinder. The cylinder body of the flip cylinder can be rotatably mounted on the mold base plate 3a through the second hinge 3g, and the piston rod of the flip cylinder can be rotatably mounted on the mold cover plate 3b through the third hinge 3h. Through such a design, the mold cover plate 3b adopts a flipping opening and closing method, which can not only reliably cover and ensure the fit between the sound insulation cotton and the plastic parts, but also can be in a completely open state when opened, so that the welded finished product is easy to take out.

[0029] Among them, the second hinge 3g is hinged to the end of the cylinder body of the flip cylinder away from the piston rod, and the third hinge 3h is hinged to the outer end of the piston rod of the flip cylinder, so as to obtain a larger stroke and higher flexibility.

[0030] In this embodiment, two first hinged parts 3f are preferably used, so as to further improve the reliability of the hinged connection between the mold cover plate 3b and the mold bottom plate 3a.

[0031] For further information, see Figure 3 and Figure 4 At least two upwardly extending support seats 3i are installed on the tire base plate 3a. When each driving device 3c drives the tire cover plate 3b to cover the tire base plate 3a, the outer edge of the side of the tire cover plate 3b away from the first hinge 3f is supported on the upper end of each support seat 3i, thereby effectively limiting the maximum downward pressure position of the tire cover plate 3b, thereby playing a role in protecting the plastic parts.

[0032] Furthermore, a buffer pad 3j made of elastic rubber is installed on the upper end of each support seat 3i and the outer end of each pressure head 3e. The buffer pad 3j can play an excellent buffering role, thereby protecting the plastic parts and the tire cover plate 3b.

[0033] See also Figure 2 and Figure 5The ultrasonic welding head assembly 4 includes an assembly housing 4a installed at the end of the robot arm 1 and two welding head brackets 4c installed in the assembly housing 4a through corresponding slide rails 4b. The two welding head brackets 4c are both installed with ultrasonic welding heads 4d whose outer ends pass through the assembly housing 4a. The assembly housing 4a is installed with two bracket translation cylinders 4e that can drive the corresponding welding head brackets 4c to slide along the corresponding slide rails 4b. Therefore, the piston rods of the two bracket translation cylinders 4e can drive the corresponding welding head brackets 4c to slide along the slide rails 4b, thereby adjusting the position of the welding point of the ultrasonic welding head 4d, which is simple and reliable.

[0034] In this embodiment, the two ultrasonic welding heads 4d are arranged at 90 degrees, which can not only efficiently perform ultrasonic welding alternately, but also simplify the control algorithm and improve the control accuracy.

[0035] See also Figure 1 and Figure 2 The tire positioning platform 2 includes a bottom frame 2a and a positioning platform top plate 2b installed on the bottom frame 2a in the horizontal direction. The positioning platform top plate 2b is provided with two rows of side edge positioning rollers 2c respectively adjacent to the outer edges on both sides of the length direction thereof and a plurality of supporting balls 2d distributed between the two rows of side edge positioning rollers 2c. The positioning platform top plate 2b is provided with at least one positioning seat 2e arranged adjacent to the outer edge of one side in the width direction thereof. The positioning platform top plate 2b is provided with at least one positioning hole 2f arranged adjacent to the outer edge of the other side in the width direction thereof. The outer edge of one side in the width direction of the tire bottom plate 3a is recessed to form positioning grooves 3a1 respectively matched with the corresponding positioning seats 2e. The tire bottom plate 3a is provided with pin through holes 3a2 corresponding to each positioning hole 2f one by one. When the tire base plate 3a is supported on each supporting ball 2d, and the outer edges on both sides of the length direction of the tire base plate 3a are respectively rollingly supported on the corresponding side edge positioning rollers 2c, the positioning seats 2e can be respectively embedded in the corresponding positioning grooves 3a1, and the locking pin 2g can pass through the pin hole 3a2 and the positioning hole 2f in sequence, so as to lock the tire base plate 3a on the positioning platform top plate 2b.

[0036] Therefore, when installing the tire jig 3, the tire jig bottom plate 3a is first rollingly supported on the corresponding side edge positioning rollers 2c, that is, one side outer edge of the tire jig bottom plate 3a in the length direction is rollingly supported on a row of side edge positioning rollers 2c, and the other side outer edge of the tire jig bottom plate 3a in the length direction is rollingly supported on another row of side edge positioning rollers 2c. At the same time, the bottom surface of the tire jig bottom plate 3a is rollingly supported on each supporting ball 2d. Then, the tire jig bottom plate 3a is pushed in the width direction so that the positioning grooves 3a1 on the one side outer edge in the width direction of the tire jig bottom plate 3a are respectively supported on the corresponding positioning seats 2e. At this time, each latch through hole 3a2 is respectively located directly above the corresponding positioning hole 2f. Finally, the locking pin 2g is used to pass through the latch through hole 3a2 and the positioning hole 2f in sequence, thereby locking the tire jig bottom plate 3a on the top plate 2b of the positioning platform, which not only ensures the positioning accuracy of the tire jig 3, but also makes the adjustment of the positioning process of the tire jig 3 very convenient and simple to operate.

[0037] See also Figure 1 A circle of safety fence 5 is arranged around the robot arm 1 and each jig positioning platform 2, that is, the safety fence 5 surrounds the robot arm 1 and each jig positioning platform 2. The safety fence 5 is provided with door openings 5a corresponding to each jig positioning platform 2, so as to facilitate the taking and placing of the jigs 3 on each jig positioning platform 2. At the same time, safety gratings 6 are installed on both sides of each door opening 5a to avoid safety accidents caused by starting the robot arm 1 when taking and placing the jigs 3. In addition, lighting lamps 7 are installed above each door opening 5a, so as to provide effective lighting for each workstation.

[0038] Furthermore, the baffles of the safety enclosure 5 are all made of transparent material to facilitate the staff to penetrate the internal situation.

[0039] Furthermore, the frame of the safety enclosure 5 and each bottom frame 2a together form an integrated frame structure, thereby greatly improving the overall structural strength.

[0040] Furthermore, two mutually parallel forklift slots 5b are provided at the bottom of the frame of the safety enclosure 5 to facilitate the overall transportation of the plastic sound insulation cotton ultrasonic welding equipment by a forklift.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. An ultrasonic welding device for sound insulation cotton of plastic parts, comprising a mechanical arm (1) and a plurality of jig positioning platforms (2) arranged circumferentially around the mechanical arm (1), each jig positioning platform (2) being provided with a jig (3), an ultrasonic welding head assembly (4) being installed at the end of the mechanical arm (1), characterized in that: The jig (3) comprises a jig bottom plate (3a) placed on a corresponding jig positioning platform (2) in a horizontal direction, a jig cover plate (3b) that can be opened or covered on the jig bottom plate (3a), and at least one driving device (3c) for driving the jig cover plate (3b); the upper surface of the jig bottom plate (3a) is provided with a contoured fetal membrane, the contoured fetal membrane is composed of a plurality of supporting protrusions (3d) protruding from the upper surface of the jig bottom plate (3a); a plurality of pressure heads (3e) are provided on one side of the jig cover plate (3b) close to the jig bottom plate (3a); and a plurality of welding clearance notches (3b1) are provided on the jig cover plate (3b); When each driving device (3c) drives the mold cover plate (3b) to cover the mold bottom plate (3a), each pressing head (3e) can press the sound insulation cotton onto the upper surface of the plastic part placed on each supporting protrusion (3d), so that the robot arm (1) can drive the ultrasonic welding head assembly (4) to pass through each welding clearance gap (3b1) one by one to weld the sound insulation cotton onto the upper surface of the plastic part.

2. The ultrasonic welding equipment for plastic sound insulation cotton according to claim 1 is characterized by: One side outer edge of the tire cover plate (3b) is rotatably mounted on the corresponding outer edge of the tire base plate (3a) via at least one first hinge (3f); the driving devices (3c) are all flip cylinders; the cylinder bodies of the flip cylinders are rotatably mounted on the tire base plate (3a) via second hinges (3g); and the piston rods of the flip cylinders are rotatably mounted on the tire cover plate (3b) via third hinges (3h).

3. The ultrasonic welding equipment for plastic sound insulation cotton according to claim 2 is characterized by: At least two support seats (3i) extending upward are installed on the tire base plate (3a). When each driving device (3c) drives the tire cover plate (3b) to cover the tire base plate (3a), the outer edge of one side of the tire cover plate (3b) away from the first hinged member (3f) is supported on the upper end of each support seat (3i).

4. The ultrasonic welding equipment for plastic sound insulation cotton according to claim 3 is characterized by: The upper end of each support seat (3i) and the outer end of each pressure head (3e) are both installed with a buffer pad (3j) made of elastic rubber.

5. The ultrasonic welding equipment for plastic sound insulation cotton according to claim 1 is characterized by: The ultrasonic welding head assembly (4) comprises an assembly shell (4a) mounted at the end of the mechanical arm (1) and two welding head brackets (4c) mounted in the assembly shell (4a) via corresponding slide rails (4b), the two welding head brackets (4c) are each mounted with an ultrasonic welding head (4d) whose outer ends extend out of the assembly shell (4a), and the assembly shell (4a) is mounted with two bracket translation cylinders (4e) each capable of driving the corresponding welding head bracket (4c) to slide along the corresponding slide rail (4b).

6. The ultrasonic welding equipment for plastic sound insulation cotton according to claim 1 is characterized by: The tire positioning platform (2) comprises a bottom frame (2a) and a positioning platform top plate (2b) mounted on the bottom frame (2a) in a horizontal direction, the positioning platform top plate (2b) is provided with two rows of side edge positioning rollers (2c) respectively adjacent to the outer edges on both sides in the length direction thereof and a plurality of supporting balls (2d) distributed between the two rows of side edge positioning rollers (2c), the positioning platform top plate (2b) is provided with at least one positioning seat (2e) adjacent to the outer edge on one side in the width direction thereof, the positioning platform top plate (2b) is provided with at least one positioning hole (2f) adjacent to the outer edge on the other side in the width direction thereof, the outer edge on one side in the width direction of the tire bottom plate (3a) is recessed to form positioning grooves (3a1) respectively matched with the corresponding positioning seats (2e), and the tire bottom plate (3a) is provided with pin through holes (3a2) respectively corresponding to the positioning holes (2f); When the mold base plate (3a) is supported on each supporting ball (2d), and the outer edges on both sides of the length direction of the mold base plate (3a) are respectively rolling supported on the corresponding side edge positioning rollers (2c), the positioning seats (2e) can be respectively embedded in the corresponding positioning grooves (3a1), and the locking pin (2g) passes through the latch hole (3a2) and the positioning hole (2f) in sequence, thereby locking the mold base plate (3a) on the positioning platform top plate (2b).

7. The ultrasonic welding equipment for plastic sound insulation cotton according to claim 1 is characterized by: The invention also comprises a safety enclosure (5) surrounding the mechanical arm (1) and each mold positioning platform (2), wherein the safety enclosure (5) is provided with door openings (5a) corresponding to each mold positioning platform (2) one by one, and each door opening (5a) is provided with a safety grating (6) on both sides, and each door opening (5a) is provided with an illumination lamp (7) above.

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