RU2486116C2 - Device for assembly and sealing of articles from polymer film - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: device is intended for assembly and sealing of articles from polymer film by annular seam to make bags and envelopes with sealed ring furnished with elastic ring on its activated surface. This device comprises base 1, electrode wheel 2, and holder 3 of parts to be sealed provided with rotary drive. Said holder 3 is composed of disc 4 furnished with cartridge 5 made from anti-adhesive material to support appliance 6 for elastic ring 29. Note here that pressure segments 7 connected with radial displacement drive adjoins said cartridge 5.

EFFECT: ease of assembly, higher quality of welding.

6 cl, 17 dwg

Description

The invention relates to the field of welding of plastics and can find application in industrial equipment for welding of circular seams of products in the form of bags and shells for various purposes.

A device is known for welding a thermoplastic sleeve (RF patent No. 2076834, IPC B65B 51/20, 1997). The device comprises a clamp in the form of a filling pipe and a heating element consisting of a housing, a heater, insulating gaskets, fixed by plates. A support is fixed on the casing, in the slots of which a lever is mounted with the possibility of rotation around the axis of the casing and the plug, covering the heating element. The lever and fork are interconnected with the possibility of rotational-translational movement. One of the arm shoulders is equipped with a plate that serves to separate the material of the sleeve adhered to the insulating gaskets, and the second arm with a spring.

Such a device provides welding of the sleeves along the generatrix of the cylinder, i.e. along the sleeve. The disadvantage of this device is the inability to perform welds at an angle to the longitudinal axis of the sleeve, for example, welding of ring seams that are deployed at an angle of 90 ° to the generatrix of the cylinder.

A device is known (RF patent No. 2098328, IPC ВВВ 51/10, ВВВ 51/16 В29С 65/00, В29С 65/02, 1997) for welding thermoplastic material. The device consists of a drive, a welding mechanism, a material moving mechanism and a finished product dispensing mechanism. The welding mechanism is made in the form of two drums - a cylindrical drum with a heating element and a repellent and a pressure drum located in it.

However, such a device does not provide for the assembly and welding of three-dimensional structures, in particular welding of circumferential seams.

A device for seam welding of circumferential seams according to the patent of the Russian Federation No. 2056239, IPC VK 11/08, 1996, which is characterized by the greatest number of common features with the claimed device. The device comprises a base, a welding roller, a holder for welded parts with a drive for its rotation. To ensure seam welding, the device additionally contains a control element for switching on the welding current, a mechanism for horizontal movement of the welding roller, made in the form of rails mounted on the base with a slide and a screw for moving the slide on the rails, a spindle with a finger, a two-arm lever pivotally mounted on the rails, an additional screw for raising and lowering the welding roller.

Such a device is characterized by increased complexity and does not provide for the assembly and welding of products in the form of polymer shells with neck elements, since it cannot provide reliable fixation of the assembled product. A significant drawback in this case is the impossibility of ensuring the coincidence of the edges of the welded parts without the formation of corrugations, which reduce the reliability of the weld. In addition, the known device does not allow welding shells in the form of bags without twisting the latter during rotation of the mandrel, which is unacceptable.

Polymeric shells with neck elements include, for example, elements of respiratory protection, in particular: breathing bags or protective hoods. The latter are usually made in the form of a bag of a transparent polymer film (fluoroplastic F4 - MB, kapton, etc.), resistant to high temperatures and chemicals (for example, chlorine, sulfur compounds, etc.). The neck of such a bag is equipped with an elastic element (obturator) in the form of a ring of soft rubber or latex. The neck is usually made in the form of a ring from the same polymeric material as the protective hood. Moreover, the connection of such a ring with an elastic element is carried out by gluing. The neck with the bag is connected by an annular weld, which requires that the edges of the parts to be welded coincide during assembly.

The problem to which the invention is directed is to increase productivity, as it allows the assembly and welding process to be performed in one operation, to ensure a better weld quality by eliminating the formation of corrugations and twisting of structural elements when welding an annular weld.

The problem is solved in that in a device for assembling and welding with an annular seam of products from a polymer film in the form of bags and shells with a welded ring having an elastic ring on its activated surface, including a base, a welding roller, a holder for welded parts with a drive for its rotation, the holder for the parts to be welded is made in the form of a disk provided with a cage of release material, on which a mandrel for the elastic ring is fixed, while the clamps for the parts to be welded are adjacent egmenty connected to drive radial movement.

The radial movement drive of the clamping segments comprises a squeezing and clamping device, the squeezing device is made in the form of axes of bearings mounted on the clamping segments that interact with the cam, and the clamping device is made in the form of springs with studs mounted for axial movement in the channels of the ring fixed to the disk, the outer surface of which is made in the form of a polyhedron.

The welding roller is equipped with a rotation drive kinematically connected to the rotation drive of the holder of the welded parts.

The clamping segments are provided with guide rods mounted for movement in the channels made in the ring.

The mandrel for the elastic element is made in the form of a shell.

The device is equipped with a mounting ring.

The holder for the parts to be welded in the form of a disk equipped with a cage of anti-adhesive material, on which a mandrel for the elastic element is fixed, and the presence of clamping segments adjacent to the cage connected to the radial displacement drive ensures the assembly of mating parts by centering one of the parts (ring) due to the elastic properties of the elastic element when putting it on the mandrel, as well as the alignment of the shell when putting it on the clip. This ensures the fixing of the mating parts when shifting to the center of the clamping segments and the connection of the mating parts with an annular weld when summing the heated welding roller to the cage of the rotating disk. As a result, the welding quality and ease of assembly of the product are improved.

The drive radial movement of the clamping segments in the form of squeezing and clamping devices, and the squeezing device is made in the form of axes mounted on the clamping segments of the bearings interacting with the cam, and the clamping device is made in the form of springs with studs installed with the possibility of axial movement in the channels mounted on the disk rings, the outer surface of which is made in the form of a polyhedron, provides reliable fixation of the mating parts by providing the possibility of regulation tion clamping force by means of springs due to the threads on the studs. When the cam is rotated, the pressure segments can synchronously retract from the cage. This provides an increase in the quality of the weld and simplification of assembly of the product.

The supply of the welding roller with a rotation drive kinematically connected to the rotation drive of the holder of the welded parts provides an increase in the quality of the weld due to the normalization of shear deformations in the welding zone.

The supply of the clamping segments with guide rods installed with the possibility of movement in the channels made in the ring eliminates the distortion of the clamping segments when they are brought to the cage and retracted to the extreme positions, which increases the reliability of the device.

The mandrel for the elastic element in the form of a shell provides the placement of the welded product in the cavity of the mandrel, which eliminates damage to the shell when performing an annular seam, which also increases the reliability of the device.

The supply of the device with an installation ring for bending the edges of one of the parts to be welded ensures that the peripheral part of the ring section is welded, which simplifies the installation of the edge of the shell on the mating part, providing ease of assembly of the product.

The drawings show:

figure 1 - view of the device at the time of installation of the ring;

figure 2 is the same as in figure 1, after bending the edges of the ring mandrel;

figure 3 - the same as in figure 1, at the time of installation on the disk shell;

4 is a view of the device at the time of welding;

5 is a view of the device, a view from the side of the shaft;

6 is a disk design;

Fig.7 is the same, a cross-section along BB-6;

Fig.8 is a ring design;

Fig.9 is the same, section aa of Fig.8;

figure 10 - design of the cam;

11 is the same, a cross section along BB of 10;

Fig - design of the clamping segment;

Fig.13 is the same, the section along DD DD of Fig.14;

Fig.14 is a section along G-D of Fig.12;

Fig. 15 is a cross-section along EE of Fig. 13, showing the installation of guide rods;

Fig is a General view of the welded product, side view;

Fig.17 is the same as in Fig.16, a top view;

The list of items indicated in the drawings:

1 - base;

2 - welding roller;

3 - holder of the welded parts;

4 - disk;

5 - clip;

6 - mandrel;

7 - clamping segment;

8 - bearing;

9 - axis;

10 - cam;

11 - hairpin;

12 - spring;

13 - the central channel;

14 - ring;

15 - a directing core;

16 - channel:

17 - sleeve;

18 - shaft;

19 - a shaft drive pulley;

20 - pulley drive roller;

21 - the bearing;

22 - rack;

23 - plain bearing;

24 - sleeve;

25 - drive;

26 - installation ring;

27 - shell;

28 - ring;

29 - an elastic element;

30 - a central hole;

31 - weld.

A device for assembling and welding products from a polymer film contains a base 1, a welding roller 2, a holder for welded parts 3 with a drive for its rotation (not shown), a holder for welded parts 3 is made in the form of a disk 4, on which a clip 5 made of release material , for example from F-4 fluoroplastic sheet, and mandrel 6 is fixed in the form of a shell. Clamp 5 is adjacent to the clamping segments 7, connected to the radial movement drive in the form of squeezing and clamping devices. The squeezing device is made in the form of bearings 8 mounted on the pressing segments 7, mounted on the axles 9. The cam 10 interacts with the bearings 8. The pressing device is made in the form of studs 11 and springs 12. The studs 11 are mounted with the possibility of axial movement in the central channels 13 of the ring 14, the outer surface of which is made in the form of an octahedron. The ring 14 is coaxially fixed to the disk 4. The clamping segments 7 are also provided with guide rods 15 mounted for movement in the channels 16 made in the ring 14. The disk 4 is mounted on a sleeve 17 mounted fixed on the shaft 18, on which the shaft drive pulley 19 is also mounted 18 and the pulley 20 of the drive of the welding roller 3. The shaft 18 is mounted in bearings 21, pressed into the bores of the uprights 22, mounted on the base 1. A sleeve bearing 23 and a sleeve 24 connected to the drive 25 are installed on the sleeve 17. Chenoa mounting ring 26 for bending the edges of one of the welded parts.

On Fig and 17 shows a General view of the welded product, which is made of a fluoroplastic film of the brand F-4MB with a thickness of 50 μm shell 27, the open part of which is connected to the ring 28 made of the film F-4MB with the activated surface from the side to which glued the elastic element 29 of latex rubber. A central hole 30 is made in the center of the elastic element 29. The connection of the sheath 27 with the inactive surface of the ring 28 is made by a weld 31.

The device operates as follows.

Previously driven 25, the sleeve 24 together with the cam 10 is rotated to the maximum bearing position 8 together with the axles 9 from the center of rotation of the disk 4. In this case, the pressing segments 7 of the holder of the welded parts 3 are retracted to the maximum distance from the ring 14, compressing the spring 12 when moving the studs 11 and the guide rods 15 extend from the channels 16. The central hole 30 of the elastic member 29 is manually stretched and mounted on the mandrel 6, as shown in FIG. This ensures the alignment of the ring 28 and the fit of its edges to the end face of the disk 4. With the mounting ring 26, the edges of the ring 28 are bent to the clip 5 under the bore of the pressure segments 7, as shown in figure 2, after which the drive 25 pressure segments 7 are partially brought to the axis of rotation fixing the edge of the ring 28. Then, on the bent edges of the ring 28, the edge of the sheath 27 is set, as shown in FIG. By turning the drive 25, the sleeve 17 is rotated on the sliding bearing 23, while the protrusions of the cam 10 are disengaged from the bearings 8. Under the action of the springs 12, the studs 11 move in the central channels 13 and the clamping segments 7 and their protrusions press the edges of the parts to be welded to the yoke 5, fixing the edges of the welded shell 27 and the ring 28, as shown in Fig.4. When moving the clamping segments 7, their distortions are eliminated by guide rods 15, which are moved in the channels 16 of the ring 14. The free end of the sheath 27 is tucked into the cavity of the mandrel 6, thereby protecting the sheath 27 from damage during welding. This completes the assembly of the cap before welding.

To perform welding of the annular seam 31, the drive of rotation of the shaft 18 from the drive mechanism (not shown) is turned on through the drive pulley of the shaft 19. The rotation of the shaft 18 is carried out in bearings 21 installed in the struts 22, mounted on the base 1. The rotation of the shaft 18 is transmitted through the sleeve 17 to the disk 4 and the ring 14 and the clamping segments connected to it 7. The rotation of the shaft 18 is also transmitted to the drive pulley 20 of the welding roller 2. When a heated welding roller 2 is supplied with a predetermined force (determined experimentally) to the rotating disk 4, the sheath 27 and the ring 28 p they are pressed against the holder 5 and a weld 31 is formed at the contact point of the welding roller 2. After welding, the shaft drive 18 is stopped and the cam 25 together with the sleeve 24, the cam 10 is rotated on the plain bearing 23 to the position of the hold-down segments 7. The finished product is removed from the mandrel 6 .

The proposed device is simple in hardware design and operation and provides for the assembly and welding of ring seams of products from a polymer film.

Claims (6)

1. A device for assembling and welding with an annular seam of products from a polymer film in the form of bags and shells with a welded ring having an elastic ring on its activated surface, including a base, a welding roller, a holder for welded parts with a drive of its rotation, characterized in that the holder for the parts to be welded, made in the form of a disk equipped with a cage of release material on which a mandrel for the elastic ring is fixed, while the clamping segments adjoin the cage for the parts to be welded, connecting nnye driven radial movement. 2. A device for assembling and welding products from a polymer film according to claim 1, characterized in that the radial movement drive of the pressing segments comprises a squeezing and pressing device, the squeezing device is made in the form of axes of bearings mounted on the pressing segments that interact with the cam, and the pressing the device is made in the form of springs with studs installed with the possibility of axial movement in the channels of the ring fixed to the disk, the outer surface of which is made in the form of a polyhedron. 3. A device for assembling and welding products from a polymer film according to claim 1 or 2, characterized in that the clamping segments are provided with guide rods mounted to move in channels made in the ring. 4. A device for assembling and welding products from a polymer film according to claim 1, characterized in that the welding roller is equipped with a rotation drive kinematically connected to the rotation drive of the holder of the welded parts. 5. A device for assembling and welding products from a polymer film according to claim 1, characterized in that the mandrel for the elastic element is made in the form of a shell. 6. A device for assembling and welding products from a polymer film according to claim 1, characterized in that the device is provided with a mounting ring.

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