RU118944U1 - PACKAGING MACHINE TERMINOUS AND TERMINOKER LIFTING AND LOWERING MECHANISM - Google Patents

Abstract

1. Thermal knife of a packaging machine, characterized in that it contains a holder connected to the mechanism for raising and lowering the thermal knife, the holder is made with a cutting element stretched on it and with two tensioned welding elements located on opposite sides of the cutting element, a dielectric pad is attached to the holder made of dielectric material, in the strip on the sides of its ends, sockets are made with spring-loaded sliders located in them, to which the cutting element, welding elements are connected, a negative electric wire for supplying current to the cutting element and a positive electric wire for supplying current to the cutting and welding elements, under the holder there is a stop with a non-stick heat-resistant self-adhesive cloth on it, the non-stick cloth of the stop is located above the pad glued to it, made of a porous and elastic dielectric material. ! 2. The mechanism for raising and lowering the thermal knife of the packaging machine according to claim 1, characterized in that it contains racks installed on the frame, each of which has a U-shaped cross-section, a stretched rod is located in each U-shaped opening of the rack and on it a slider made in the form of a sleeve is installed with the ability to slide, the lower and upper strips are connected to the sliders, respectively, forming a frame for moving the thermal knife, the latter has a holder, the support of the thermal knife is fixed on the racks, located under the thermal knife with the possibility of their contact in the working position, on a magnetic cup is fixed to the lower bar of the frame, which is located with the possibility of its contact with the electric

Description

The technical solutions presented in this description relate to packaging machines for packaging products in shrink film, the main part of which is a thermal knife and means for moving it.

Known welding sponge of a packaging machine containing two clamps and a heater, the clamps are located on the working surface of the sponge indented from the heater (RU2348838C2, F16B 11/00, B65 B 51/22, 03/10/2009).

A device for packaging thermally adhesive material containing welding elements and a transverse cutting mechanism, including a retractable knife, a cutter in the form of jaws that are mounted on the carriage (RU2165382C1, B65B 9 / 06.10.02.1998).

A device for splicing thermoplastic tapes containing a welding unit, a cutting tool consisting of heating elements (RU99116015A, B65B 41/12, 05.20.2001).

A device for connecting a film (options) containing clamps, cutting knives, levers on which a heater and a knife are mounted (RU2130411C1, B65B 41/12, 05.20.1999) is known.

Known thermal knife packaging machine containing heat sealing elements, cutting and stitching knives, providing the formation of two transverse edges of the package (RU2391266C1, B65B 9/06, 06/10/2010).

Known welding sponge of a packaging machine for making a weld in heat-sealable packaging material, containing clamps to the welded materials of the working surfaces and made in the form of a rod heater, characterized in that it contains a clamp located on the surface of the sponge indented from the heater and protruding above the sponge (RU2005115841A , B65B 1/22, 07/27/2006).

Known packaging machine with independent cutting and welding rods containing the first longitudinal and second transverse cutting and welding rods (RU2008135949A, B65B 9/06, 03/20/2010).

A device for welding a film containing clamps and a heater (RU95117113A, B65B 41/12, 12/27/1997) is known.

A packaging machine is known comprising welding and cutting units of a film, which are located separately from each other, respectively, above and below the window of the packaging machine and are arranged to move them towards each other, the cutting unit being equipped with a knife configured to extend it for film cutting (RU 71630 U1, 03.20.2008).

A device is also known in which there is a welding mechanism comprising a spring-loaded thermal knife pivotally connected to the rear wall of the fixed frame (RU5171 U1, 10.16.1997).

A known installation for packaging products in shrink film containing mounted on the base of the heating elements, while along the perimeter of the lower part on two adjacent sides are linear heaters of the welding device made of nichrome wire (RU95118220A, 10.10.1997).

A device for packaging products in a shrink film containing a clamping jaw of a welding fixture located in the transverse window of the table, a welding-cutting jaw located on the frame, made to rotate in a vertical plane, a loading fixture containing a pushing bar, the frame is equipped with a U-shaped a lever with a swinging clamp pressing the heat-shrink film and the block of products at the time of welding, and the transverse window is made with a shutter that closes the lower welding jaw at the moment of place the product block at the welding position and kinematically connected with the pushing bar (RU 2203841C1, 05/10/2003).

A device for packaging products in a thermoplastic polymer film, mainly heat-shrinkable, comprising a roll unwinding unit with a support roller mounted in the housing, a welding unit and a heating table, the welding unit includes a clamping beam installed above the elastic support carrying a profile resistive electric heater, the heating table is installed behind the welding unit, on the supporting roller of the unwinding unit, the perforator spikes are radially fixed, on the case there is an additional horizontal mounting frame ka (RU 2132775 C1, July 10, 1999). The invention provides a snug fit of the film to the surface of the product, increasing the quality of the package, and also produces packaging in different starting materials with a different sequence of operations.

Known manual installation for packing piece or a group of products in a shrink film containing a frame with a working table and a transitional table, between which there is a thermal knife, a lever through a rod connected to the foot pedal of the thermal knife drive, while a heat-shrinkable passage chamber with a conveyor is located behind the thermal knife, and the steering wheel the film is located under the desktop (RU 2170195 C2, 07/10/2001).

A device is known for packaging roll material into a shrink film containing a film feeding mechanism, a thermal knife for cutting a film, a feeding and output conveyor, a heat chamber and means for forming the ends of the package, while the thermal knife is mounted on a swing arm (RU 2086482 C1, 08/10/1997).

Devices for packaging products into a film are known from foreign patent documentation, each of which contains a frame, assemblies for unwinding a roll and packaging products into a film, means for welding film and a shaper of products into packages (WO 20060771103 A1, 07.27.2006; WO 2007080451 A2 07/19/2007; GB 1,421,977 A; 01/21/1976; US 3,583,888 A; 06/08/1971; US 3,578,839 A; 06/28/1971; US 4,104,848 A; 08/08/1978; US 4,945,707 A, 7/8/1990; US 4,945,707A, 07/08. 1990; FR 2062674 A5, 06/25/1971; FR 2617121 A1, 12/30/1988; DE 2822674 A1, 11/29/1979).

A known method of packaging an article by wrapping it with an anti-corrosion film or paper using heating the film and reducing the heating, as well as a device for implementing the method, comprising a metal table with a continuation in the form of a conveyor, film rolls with the possibility of unwinding it on the table, a packaging device and an oven ( JP 3846999 B2, 11/15/2006).

A thermal knife of a packaging machine is known, characterized in that it comprises a holder, a cutting element stretched on it made of a heated thread, and welding elements located on opposite sides of the cutting element, an emphasis is placed under the holder so that during operation of the thermal knife the cutting element is pressed to the stop through the welded film, and the stop is mounted on the table of the packaging machine with the possibility of interaction with the heated thread of the cutting element and the welding elements RU 111110U1, 12/10/2011 (RU 20 11123446/13 dated 06/09/2011 with a decision on the grant of a patent in the name of the same applicant). This source of information has a mechanism for raising and lowering the thermal knife, characterized in that it contains racks mounted on the frame, on each rack there is a rod, on each rod there is a slider with a thermal knife holder, and on the racks there is a thermal knife stop located under the thermal knife with the possibility of contact in working position, the mechanism has levers for moving the holder of the thermal knife.

The complexity of the construction of the thermal knife and the mechanism of its movement have a negative impact on the reliability of their work, which leads to the need for adjustment and repair work and, as a result, significantly reduces the productivity of the line.

The technical result of utility models is to simplify the design of the moving device, increase the reliability of the thermal knife and the mechanism for raising and lowering it.

The technical result is obtained by a thermal knife of a packaging machine, characterized in that it comprises a holder connected to a mechanism for raising and lowering the thermal knife, the holder is made with a cutting element stretched thereon, made of a solid nichrome thread, and with two tensioned welding elements located on opposite sides of a cutting element, a dielectric overlay of dielectric material, for example, of PCB, is attached to the holder, while nests are made in the overlay from the sides of its ends with compression springs located in them, each spring abuts with one end at one end of the slider, and with its other end it abuts against the end of the socket, while the other end of each slide is installed in the guide rails of the holder, screws are installed on the sliders, to which the cutting element is welded elements, a negative electric wire for supplying current to the cutting element and a positive electric wire for supplying current to the cutting and welding elements, and the dielectric pad is fixed to the holder with screws, laid in the nests of the lining, and these nests are filled with a dielectric cured composition, under the holder there is an abutment with a non-stick heat-resistant self-adhesive fabric on it, the abutment is located in such a way that during operation of the thermal knife the cutting element is pressed against the non-stick abutment fabric through a welded film, the non-stick abutment fabric is located over a pad glued to it, an overlay made of a porous and elastic dielectric material, a non-stick fabric is fixed to the stop with strips attached to ntami to the sides of the stop.

The technical result is obtained by the mechanism of raising and lowering the thermal knife of the packaging machine, characterized in that it contains racks mounted on the frame, each of which has a p-shaped cross section, in each p-shaped opening of the rack there is a tensioned rod, one end of which is fixed with the possibility of tension. on the upper part of the frame, and its other end is fixed on the lower part of the frame, a slide made in the form of an elongated cylindrical sleeve is mounted on each rod with sliders, respectively, the lower and upper strips are connected, forming a frame for moving the thermal knife with the sliders, the holder of which is fixed on the upper bar, while on the racks there is a thermal knife stop located under the thermal knife with the possibility of their contact in the working position, a magnetic cup is fixed on the lower bar of the frame, which is it is put with the possibility of its contact with an electromagnet mounted on the rod with the possibility of adjusting its height relative to the frame, while the lower lever is fixed by a hinge on the frame, the upper lever is fixed by a hinge on the lower frame of the frame, these levers are equipped with a hook welded to each of them with the coils of a compression spring connecting the ends of the levers that are inserted into the spring from its two opposite ends.

1 shows a thermal knife mounted on a frame of a packaging machine.

In Fig.2 - view A in Fig.1.

Figure 3 - node connecting the spring with the levers of the mechanism for raising and lowering the knife.

Figure 4 is a view of B in figure 3.

Figure 5 - shows the attachment of the knife to the frame of its movement.

Figure 6 is a view In figure 5.

In Fig.7 is a section GG in Fig.5 (enlarged).

On Fig - place W in Fig.7 (enlarged).

Figure 9 is a cross section DD in figure 5.

Figure 10 - place E in figure 5 (enlarged).

11 shows the emphasis of the thermal knife.

The thermal knife and the mechanism for raising and lowering it are mounted on the frame 1 of the packaging machine (Fig. 1), on which the racks 2 are fixed and each of them has a U-shape in cross section. In each U-shaped opening of the rack 2 there is a stretched rod 3, one end of which is fixed with the possibility of tension on the upper part of the frame, and the other end is fixed on the lower part of the frame. The ends of the rod 3 are fixed with the possibility of their movement relative to the frame and the possibility of tensioning the rod. On each rod 3 with the possibility of sliding mounted slider 4, made in the form of an elongated cylindrical sleeve. The lower bar 5 and the upper bar 6, respectively, are connected to the sliders, which together with the sliders form a frame for moving the thermal knife 7 in the vertical direction. The thermal knife 7 is fixed on the upper bar 6, on which the handle 8 for moving the thermal knife is also fixed. On the racks 2 there is a fixed stop 9 of the thermal knife (FIGS. 2, 11) located under the thermal knife 7 with the possibility of their contact in the working position.

A magnetic cup 10 is fixed on the lower bar 5 (Fig. 2), which is located with the possibility of its contact with an electromagnet 11, mounted on a rod 12 with the possibility of adjusting the height of the electromagnet relative to the frame 1. The adjustment is made by a pin 13 screwed into the rod 12 and the electromagnet 11. The lower arm 15 is fixed on the frame 1 by the hinge 14. The upper arm 17 is fixed by the hinge 16 on the lower bar 5. The levers 15 and 17 have a hook 18, which is round in cross section, welded to each of them and engages with the spring coils 19 connecting second ends of the levers 15 and 17. The spring has a cylindrical shape and its turns run on a bend. The stiffness of the spring is selected from the calculation of its bending in the longitudinal plane of the packaging machine at an angle in the range from 170 to 15 degrees. In the initial position, the device for raising and lowering the thermal knife is mounted on the frame so that between the levers 15 and 17 and the branches 20 and 21 of the spring a predetermined angle is formed in the range from 15 to 90 degrees.

The thermal knife of the packaging machine contains a holder 22 fixed to the upper bar 6 (Fig. 5), connected by pins 23 to the upper bar 6. The holder 22 is designed to fasten and hold the cutting element 24 in the form of a continuous nichrome thread on it, and also for fastening and holding in tension the two welding elements 25 (Fig.6-8), which are located on opposite sides of the cutting element 24. To the holder 22 is attached a patch 26 of dielectric material, for example, of PCB. In the overlay from the side of its ends, nests 27 are made (FIG. 5) with compression springs 28 located in them, one of which is located in a compressed position between the slider 29 and the end of the nest 27, and the other is between the slider 30 and the end of the other nest 27 (FIG. .10) located on the opposite side of the holder. The sliders 29 and 30 are installed at one end in their respective slots 27, the other end of each slide is installed in the guides 31 of the holder 22. On the slider 29 there is a screw 32 (Fig. 6, 10) for fastening the cutting element 24 to the slider and a screw 33 for fastening the welding element 25, while the negative electric wire 34 is also fixed by a screw 32 on the slider. The welding elements 25 are fixed by one end on one of the guide rails of the holder 22 by the upper screws 33 (Fig. 6), and the other end by screws 33 on the slider 30 (Fig. 5 ) A positive electric wire 34 (Fig. 6) for supplying current to the cutting and welding elements is fixed on the slider 30 by a screw 32. The cover 26 (Fig. 9) is fixed to the holder 22 by screws 35 located in the nests of the plates, while the nests are filled with dielectric glue 36.

The holder 22 is located above the stop 9 in such a way that during operation of the thermal knife, the cutting element 24 is pressed against the non-stick fabric 37 (Fig. 11) of the stop 9 through a weldable film (the film is not shown). The non-stick fabric 37 of the stop is located above the bonded 38 to the stop 9 made of a dielectric material. The pad 38 is made of porous and resilient material. The ends of the cutting element 24 and the welding elements 25 are connected to electric wires 34 and 39 (Fig. 6), which serve to supply current for the purpose of pulse (intermittent) heating of the cutting element 24 and the welding elements 25. The negative electric wire 34 is electrically connected to the metal case of the holder 22 and mounted on it.

The stop 9 is installed on the table 40 of the packaging machine (figure 2). Non-stick self-adhesive fabric 37 (11) is made of heat-resistant, for example, Teflon, and this fabric covers the top and sides of the pad 38, which is glued to the stop. The non-stick self-adhesive fabric 37 is fixed on the abutment by clamping strips 41 attached by screws 42 to the sides of the abutment 9. A non-stick fabric 37 is also equipped with a thermal knife (Fig. 8), while the thermal knife fabric 37 is located between the cutting element 24 and the welding elements 25 of the thermal knife.

The thermal knife and the mechanism for raising and lowering it works as follows. Lay on the table 40 (figure 1) packaged in film products. The handle 8 is manually lowered down by the thermo-knife 7. At the same time, the lower bar 5 (FIG. 2) is lowered together with the thermo-knife, the magnetic cup 10 is joined to the electromagnet 11 and they are magnetized to each other. In this case, current begins to be supplied via wires 34 and 39 (Fig. 6) to the cutting and welding elements 24 and 25 and they heat up. In this case, the welding elements 25, which weld the ends of the packaging film with two parallel welding seams, are pressed to the ends of the film into which the products are packed and to the lining 38 of the stop 9 wrapped by the non-stick fabric 37 (Fig. 11). Moreover, one welding element 25 welds the ends of the packaged products, and another welding element welds the ends of the film sleeve for the next product packaging. At the same time, the heated cutting element 24 (Fig. 8) presses the welded ends of the film (not shown) to the non-stick fabric 37 (Fig. 11) and through it to the pad 38 of the stop 9. The ends of the film are melted and cut by the cutting element 24. In this case, the cutting the element 24 is pressed against the non-stick fabric 37 (Fig. 8) of the thermal knife 7. After holding a predetermined period of time from the action of the time relay, the supplied current. the electromagnet stops, the electromagnet 11 is demagnetized and the cup 10 moves away from the electromagnet. Simultaneously with the end of the current supply to the electromagnet, the current to the electric wires 34 and 39 ceases to be supplied, and the cutting and welding elements cease to heat up. Due to the non-stick fabric used, the molten film does not adhere to the cutting element 24 and the welding elements 25, and these elements remain clean for the next cycle of operation. Under the action of the spring 19, the thermal knife 7 rises, and then the described cycle is repeated.

When the thermal knife 7 is operating, its up and down movements are carried out as follows. When the thermal knife moves down, the levers 15 and 17 (FIG. 1) of the mechanism for raising and lowering the thermal knife rotate around the hinges 14 and 16 (FIG. 2), come together, and the angle between the levers decreases. In this case, the branches 20 and 21 (FIG. 3) of the spring 19 come closer, the angle between these branches decreases, and the turns of the spring in the bending zone take the position shown in FIG. 3. In this case, the thermal knife 7, the sliders 4, the lower and upper strips 5 and 6, forming the frame of the thermal knife, turn out to be spring-loaded with a spring 19, which with its elasticity tends to raise the thermal knife 7 up.

The technical result is achieved due to the maximum possible simplicity of the design of the mechanism for raising and lowering the thermal knife, which contains essentially several interconnected elements that provide a high degree of reliability. Improving the reliability of the thermal knife is achieved due to the relative position of the cutting element and the welding elements on top of each other, the choice of elasticity of the lining stop. The specified elasticity of the lining provides a given sequence of operation of the welding elements and the cutting element.

Claims (2)

1. The thermal knife of the packaging machine, characterized in that it contains a holder connected to the mechanism for raising and lowering the thermal knife, the holder is made with a cutting element stretched thereon and with two tensioned welding elements located on opposite sides of the cutting element, a dielectric pad is attached to the holder from a dielectric material, in the overlay from the sides of its ends there are nests with spring-loaded sliders located in them, to which a cutting element is connected, which weld the element you, the negative electric wire for supplying current to the cutting element and the positive electric wire for supplying current to the cutting and welding elements, under the holder there is a stop with a non-stick heat-resistant self-adhesive fabric on it, the non-stick fabric of the stop is located above the bonded to it plate made of porous and elastic dielectric material. 2. The mechanism for raising and lowering the thermal knife of the packaging machine according to claim 1, characterized in that it contains racks mounted on the frame, each of which has a p-shape in cross section, a tensioned rod is located in each p-shaped opening of the rack and on it with the possibility of sliding, a slider made in the form of a sleeve is installed, with the sliders connected, respectively, the lower and upper strips forming a frame for moving the thermal knife, the latter has a holder, the thermal knife stop located under the thermal knife is fixed on the racks m with the possibility of their contact in the working position, a magnetic cup is fixed on the lower bracket of the frame, which is located with the possibility of its contact with an electromagnet mounted on the rod, the lower lever is fixed on the frame with a hinge, the upper lever is fixed on the lower bracket of the frame, the ends of the lower and upper levers are connected by a compression spring.