WO2019004870A1

WO2019004870A1 - Device and method for producing blanks for thermoplastic vacuum cleaner bags

Info

Publication number: WO2019004870A1
Application number: PCT/RU2018/000360
Authority: WO
Inventors: Владимир Евгеньевич ЗАРЕЦКИЙ
Original assignee: Общество с ограниченной ответственностью "Топ-маркет"
Priority date: 2017-06-26
Filing date: 2018-06-04
Publication date: 2019-01-03
Also published as: RU2659047C1

Abstract

The group of inventions relates to the field of mechanical engineering and concerns a device for producing blanks for thermoplastic vacuum cleaner bags and a method for producing said blanks. The present device comprises a roll stand with conveying rollers, a table, a separator for separating blanks into layers, pneumatic drives for movable assemblies, a frame with heating elements, and a control unit for controlling all of the assemblies. The assemblies of the device have corresponding electrical connections to inputs of the control unit and of the pneumatic drives. The present method includes operations which allow the production of blanks for thermoplastic vacuum cleaner bags. The group of inventions provides the technical result of improving the quality of weld seams and of holes burned into blanks for thermoplastic vacuum cleaner bags, and of reducing electrical energy consumption.

Description

DEVICE AND METHOD OF MANUFACTURING PREPARATIONS OF THERMOPLASTIC BAGS FOR VACUUM CLEANERS

The proposed group of inventions relates to the field of engineering, relates to a device for the manufacture of blanks of thermoplastic bags for vacuum cleaners and the method of their manufacture carried out on this device, which can be implemented on a semi-automatic machine that is easily reconfigured for the manufacture of blanks of thermoplastic bags of different sizes with an opening on one of them parties.

A device for the manufacture of packages of thermoplastic film (ed. St. N 1654007, class C 29 C 65/02, publ. 07.06.91), which further comprises a drive installed between the feed and pull mechanisms, kinematically associated with the mechanism overtaking. The drive is made in the form of a yoke, carrying a bushing at the end and interacting with a two-position control system with two limit switches, a mechanism for longitudinal welding is installed at the device inlet, issuing a tubular semi-finished product welded from two polyethylene panels.

The disadvantage of this device is the limited ability of changeovers for the manufacture of packages, different in length and width. Package sizes have a relatively large tolerance in length due to the inertia of the extended kinematic chain of control action from the measuring mechanism to the executive lever-interrupter feed. Unsatisfactory quality of the welded joint, because, firstly, welding is performed by one-sided heating, rather than fusion in the sleeve common to both films in the weld pool, secondly, the technology does not guarantee the quality and uniformity of the weld without warping the film that is not fixed in the welding unit, welding stresses occur due to the temperature gradient during rapid cooling.

The technical solution of the electrode for welding thermoplastic materials is known, namely the use of electrical wire in fluoroplastic insulation as an electrode for welding and cutting thermoplastic materials (ed. St. N ° 1 344619, class В29С65 / 1 8, В29С65 / 22, publ. 1 5.1 0. 1 987). Using this solution alone does not solve the problem of making bags for vacuum cleaners, since it provides

SUBSTITUTE SHEET (RULE 26) performing only one function of the device - welding and cutting film layers that are already interconnected.

The closest of the known technical solutions of devices for the manufacture of bags from thermoplastic materials is a device for the manufacture of packages of thermoplastic material (application for the invention N ° 9401 73 1 5, class В29С65 / 02, В29С 65/22, publ. 1 07/07/1996 g.). Its essence lies in the fact that it contains an unwinding unit mounted on the frame with a drive made in the form of a rocker arm with a sleeve on the free end installed between the limit switches of the track control system, knives, one of which is spring-loaded, the transporting unit, the overrun pressure roller of which based on the lever of the measured material supply, and the drive roller is kinematically connected with the lower roller of the delivery mechanism, between which a welding unit is placed, including the traverse carrying the electric heater l, and a vertically movable clamp mounted axially above the support, which communicated via fittings to the refrigerant supply line of the hollow support and clamping the welding unit, made longitudinal grooves for the electric heater fixed to the traverse by means of a spring compensator, and clamping to the flanges of the fittings is freely suspended from the yoke, equipped with an adjustable stop, on the rod of the unwinding unit, the knife is mounted for movement, and the spring-loaded knife is designed as a separator.

This device for the manufacture of packages of thermoplastic material does not provide the performance of all the required functions (it does not burn holes, the bags are single-layer). Its technical disadvantages include a fairly high complexity and high power consumption of the device due to the large number of mechanical components and parts, the need to cool the seams with a refrigerant.

The task of the group of inventions is to create a new device that is easily reconfigured for the manufacture of bags of various sizes, as well as a new method for the manufacture of blanks of thermoplastic bags for vacuum cleaners carried out on this device.

The technical result from the use of the proposed group of inventions is to improve the quality of welds and the quality of burning holes in the blanks of thermoplastic bags of vacuum cleaners, reducing power consumption.

In this case, the device is quite simple to manufacture and maintain, due to the fact that the actuators, which are selected as pneumatic actuators, are reliable.

2

SUBSTITUTE SHEET (RULE 26) A device for making blanks of thermoplastic bags for vacuum cleaners contains a roll holder with conveying rollers, a table, a billet separator on the upper and lower layers, on which rings made of fluoroplastic silicone rubber are fixed with grooves, an exhaust rail equipped with a trailer consisting of a movable part of an exhaust trailer slats, fixed part of the trailer position of the exhaust rail and fixed parts of the limit switch, defining the size of the bags, pneumatic drives of the exhaust rail with electric rotary valves of the exhaust rail, a frame with heating elements made in the form of a transverse nichrome string, longitudinal nichrome strings and nichrome rings, a counterpart of the frame on which strips of fluoroplast-silicone rubber are made with grooves, a traverse provided with a tail consisting of from the movable part of the traverse traverse, the fixed part of the trailer of the upper position of the traverse and the fixed part of the trailer of the lower position of the traverse, pneumatic drives of the traverse with solenoid valves of the traverse sy, control unit with timer and power supply, control buttons “Start”, “Stop” and a switch of the frame size of the bag, while on the table is fixed

separator of the workpiece on the upper and lower layers, and the counterpart of the frame is installed, the movable part of the exhaust rail extractor is installed on the exhaust rail, which is movable between the fixed part of the parking position trailer exhaust rail and the fixed parts of the limiter, determining the size of the bags, the fixed part of the parking position exhaust exhaust slats and fixed parts of the trailer, defining the size of the bags have corresponding electrical connections to the inputs of the control unit, the frame with n heating elements are axially mounted above the mating part of the frame and above the workpiece separator on the upper and lower layers in such a way that the nichrome rings are axially mounted above the grooves of fluoroplastic silicone rubber rings, and the nichrome strings are axially mounted above the grooves of fluoroplastic silicone rubber bands with heating elements are mechanically connected to the cross-arm, the movable part of the cross-arm trailer is mounted on the cross-arm, which can be moved between the fixed part of the upper position of the crosshead and the fixed part of the low limit switch of the crosshead, the fixed parts of the upper and lower limit switch of the crossbar have electrical connections with the corresponding inputs of the control unit,

exhaust rail actuators and traverse pneumatic actuators are made by controlled signals to their solenoid valves with

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SUBSTITUTE SHEET (RULE 26) the corresponding outputs of the control unit, and the heating elements are suitably connected to the outputs of the control unit and connected to a power source in it for a time determined by the timer.

By means of these pneumatic actuators, the exhaust rail moves in a horizontal, or close to it plane, and in a vertical, axial to it plane - suspended traverse with a frame attached to it with heating elements (nichrome rings and strings, or frames).

The movement of pneumatic actuators is limited to limit switches. (ONTSEVIK - limit switch, opening or switching the electrical circuit of a machine or mechanism when their moving parts reach the extreme position). The limit switches consist of three parts: the part fixed on the movable structure (let's call it the “movable part of the limit switch”) and two fixed limit switches - at the ends of the movement path of the movable part.

For crossheads, these are the limit switches of the upper and lower positions of the crosshead, for exhaust rail - the limit switch of the parking position of the exhaust rail and the limit switches defined by the switch for selecting the size of the bag.

When connecting the moving part to the fixed one, an electrical contact is created and the corresponding signal is sent to the input of the control unit.

The control unit collects and analyzes signals from limit switches and generates signals that control the movement of pneumatic actuators and the supply of current to nichrome strings, or frames and rings, adjusted in magnitude and time, which makes it possible to achieve high quality seams and holes with smooth edges in blanks.

In dependent claims 2-8, 1 0-1 5 formulas, special cases of the device and method according to the invention are disclosed.

FIG. 1 shows a general view of a device for producing blanks of thermoplastic bags for vacuum cleaners.

FIG. 2 shows an image of a table with pneumatic drives with an exhaust rail and a crossbeam device for the manufacture of blanks of thermoplastic bags for vacuum cleaners.

FIG. 3 shows a frame with heating elements of a device for the manufacture of blanks of thermoplastic bags for vacuum cleaners, where: a is a frame with nichrome strings; b - frame with nichrome frames.

FIG. 4 shows a functional diagram of the device for the manufacture of blanks of thermoplastic bags for vacuum cleaners.

four

SUBSTITUTE SHEET (RULE 26) Structurally, the device for the manufacture of blanks for vacuum cleaner bags of thermoplastic materials in FIG. 1-4 contains:

1 - roll holder

2 - transporting rollers,

3 - table

4 - separator of the workpiece on the upper and lower layers,

5 - rings of fluoroplastic silicone rubber,

6 - support

7 - exhaust rail,

7k - the movable part of the exhaust rail lug,

8 - pneumatic actuators exhaust rail,

9 - frame with heating elements,

10 - mate frame,

1 1 - strips of fluoroplastic silicone rubber,

12 is a fixed part of the trailer of the upper position of the traverse,

1 3 - the fixed part of the low limit switch traverse position,

14 (1- V) - the fixed parts of the switch, defining the size of the bag,

1 5 - the fixed part of the trailer position of the parking exhaust rail,

1 6 - traverse,

16K - the movable part of the traverse traverse,

1 7 - traverse pneumatic drives

1 8 - transverse nichrome string,

19 (I-V) - longitudinal nichrome strings,

20 (1-V) - nichrome rings,

21 (I-V) - nichrome frames,

22 - control unit

23 - timer

24 - power source

25 - the start button,

26 - button "Stop",

27 - switch size of the bag

28 - input control unit, which receives a signal from the limit switch parking position exhaust rail,

29 (1-V) - the input of the control unit, which receives a signal from one of the trailer size of the bag,

five

SUBSTITUTE SHEET (RULE 26) 30 - input of the control unit, which receives a signal from the trailer upper limit switch,

3 1 - the input of the control unit, which receives a signal from the trailer of the lower position of the crosshead,

32 - exhaust rail solenoid valves,

33 - traverse solenoid valves,

34 - the output of the control unit connected to the solenoid valves of the pneumatic actuators of the exhaust rail,

35 - output control unit connected to the solenoid valves of pneumatic actuators traverse,

36 - the output of the control unit connected to the transverse nichrome thread,

37 (I-V) - outputs of the control unit, connected to longitudinal nichrome threads, or frames,

38 (I-V) - outputs of the control unit connected to nichrome rings,

39 (I-V) - the inputs of the control unit connected to the fixed parts of the limit switch, defining the size of the bag, and connected to the switch for choosing the length of the bag,

40 - control unit input connected to the “Start” button,

4 1 - input of the control unit connected to the “Stop” button,

42 - control panel.

Roll holder 1 performs the function of a hopper for rolls and is made in the form of vertical racks, between which horizontal shelves-struts and rods with these rolls are installed, located on several (for example, on three tiers - on the top, middle and bottom). From 2 to 6 rolls of breathable thermoplastic material can be installed on each rack, depending on the type of bag blanks and the number of filter layers. Rods can be made of metal pipes ФЗ / 4 and be fixed.

Transporting rollers 2, which prevent the shearing of the layers of fabrics, are installed on the upper and between the middle and lower tiers of the roll holder I. Transport rollers 2 can be made of metal pipes F 1 2 ".

The roll holder 1 and table 3 can be bolted together.

On the table 3, the workpiece separator is fixed on the upper and lower layers 4 by means of the support 6 and the counterpart of the frame 10 is mounted. On the workpiece separator on

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SUBSTITUTE SHEET (RULE 26) the upper and lower layers 4 are fixed (glued) rings of fluoroplast-silicone rubber 5, made with grooves of a semicircular cross-section. On the counter part of the frame 1 0, strips of fluoroplast-silicone rubber I 1, fixed with grooves of semicircular cross-section, are fixed (glued).

Exhaust rail 7 is made movable by means of pneumatic actuators of the exhaust rail 8, controlled, in turn, by signals coming to the solenoid valves of the exhaust rail 32 from the output 34 of the control unit 22.

Exhaust rail 7 is equipped with a trailer consisting of a movable part of the trailer exhaust rail 7k, a fixed part of the trailer parking position of the exhaust rail 1 5 and stationary parts of the trailer defining the size of the I 4 (l-V) bags. On the exhaust rail 7, the movable part of the trailer 7k is fixed, made with the ability to move between the fixed part of the trailer of the parking position of the exhaust rail 1 5 and the fixed parts of the trailer, which determine the size of bags 14 (1- V). The fixed part of the parking position trailer exhaust rail 1 5 can be fixed, for example, on the table support 3, and the fixed parts of the trailer, determining the size of bags 14 (1-V), on the lateral surface of the table 3 so that they can be in contact with the mobile part of the trailer exhaust rail 7k. The fixed part of the parking position limit switch exhaust rail 1 5 and the fixed parts of the limit switch, defining the size of bags 14 (1-V), have corresponding electrical connections to inputs 28 and 29 (1-V) of the control unit 22.

The distance that the exhaust rail 7 moves is determined by the distance between one of the fixed parts of the limit switch, defining the size of bags 14 (1) - I 4 (V), selected by the switch of the size of bag 27, and the fixed part of the limit switch of the parking position of the exhaust rail 1 5.

In order not to skew the material, rack bearings are used in the device, on which the exhaust rail 7 rests while moving (not shown).

The frame with heating elements 9 is axially mounted above the counterpart of the frame 1 0 and above the workpiece separator on the upper and lower layers 4, while the nichrome rings 20 (1-V) are axially mounted above the grooves of the fluoroplastic silicone rubber rings 5, and the longitudinal nichrome strings 1 9 (IV) axially above the grooves of the strips of fluoroplast-silicone rubber II on the counterpart of the frame 1 0. If nichrome frames 21 (1-V) are used, then they are axially mounted over the grooves of the framework of fluoroplast-silicone rubber on the counterpart of the frame 10. At the same time

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SUBSTITUTE SHEET (RULE 26) in space, the table 3, the workpiece separator on the upper and lower layers 4 and the counter part of the frame 1 0 are preferably arranged horizontally, at the same level.

The frame with heating elements 9 has a rigid mechanical connection with a cross member 1 6, and the heating elements fixed on it are electrically connected to the control unit 22. The transverse nichrome string 1 8 is connected to the output 36 of the control unit 22, the longitudinal nichrome strings I 9 (lV) or frame 21 (IV) are connected to the outputs 37 (1-V) of the control unit 22, nichrome rings 20 (IV) are connected to the outputs 38 (IV) of the control unit 22.

The frame with heating elements 9 can be made of aluminum profiles, on which removable blocks with heating elements are fastened, for example, with the help of bolts.

Traverse 1 6 is made movable by means of pneumatic drives traverse 1 7, controlled, in turn, by signals to the electromagnetic valves of the movable traverse 33 from the output 35 of the control unit 22.

Traverse 16 is equipped with a trailer consisting of a movable part of the traverse traverse 1 6k, a fixed part of the trailer upper position of the traverse 12 and a fixed part of the trailer lower position of the traverse 1 3. The traverse 1 6 has a movable part of the trailer 16k, which can be moved between the fixed part of the upper position trailer crosshead 12 and the fixed part of the lower limit switch traverse 1 3. The fixed parts of the upper 12 and lower limit switch positions of the cross beam 13 can be fixed, for example, on one of the pneumatic of logs crosspiece July 1 so as to enable them to contact the movable portion 16k trailer crosspiece. The fixed parts of the limit switches of the upper 12 and lower 13 positions of the cross member 16 are electrically connected to the corresponding inputs 30 and 31 of the control unit 22.

For ease of operation, the Start button 25, Stop 26 and the size switch of the bag 27 are placed on a separate panel 42. The Start button 25 and Stop 26 are respectively connected to inputs 40 and 41 of the control unit 22. Stop button 26 protects the device from accidentally starting or stopping the operation of the device. The "Stop" button 26 is sequentially connected to the fixed part of the trailer of the upper position of the crosspiece 12 (to block the "Start" button to avoid errors due to repeated pressing - it is not shown in Fig.).

The proposed method for the manufacture of blanks of thermoplastic bags for vacuum cleaners using the proposed device is as follows.

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SUBSTITUTE SHEET (RULE 26) First, prepare the device to work.

Removable blocks are fixed on the frame with heating elements 9 either with longitudinal and nichrome strings I 9 (l-V) or with frames 2 I (I-V), for example, using bolts. By fixing the switch of tee size of bag 27 in a certain position, the contacts 39 (1-V) of the switch of the size of bag 27 are connected to the fixed parts of the trailer, which determine the size of bags of 14 (1– V), each of which corresponds to a particular length of the bag blank.

For the manufacture of the first bag, the operator pulls the air-permeable thermoplastic material from the roll holder 1 through the transporting rollers 2 and puts the reciprocating thermoplastic material onto the counter part of the frame 1 0 on the counter part 3 of the frame 0 placed on the table 3, roll holder 1 and fit the exhaust rail 7, supported by the bottom rack and pinion bearings of the exhaust rail (not shown in Fig.).

Pressing the “Start” button 25 starts the cycle of manufacturing two blanks of thermoplastic bags, and the side and bottom seams of the blanks are performed, in which already in the previous cycle, holes and the upper seam are made on one of the sides (usually on the top).

The set of signals from the fixed parts of the trailer, defining the size of the bags 14 (IV) and the fixed part of the limit switch parking position exhaust rail 1 5 to the input 28 and 29 (IV) and signals from the fixed part of the limit switch upper position of the cross member 12 and the fixed part the low limit switch traverse 1 3 to the inputs 30 and 3 1 of the control unit 22, the signals from the buttons "Start" 25 and "Stop" 26 are formed control signals, respectively, to the solenoid valves of the exhaust rail 32 and the solenoid valve crosspiece 33 from the outputs 34 and 35 of the control unit 22.

At the initial moment of operation, the exhaust rail 7, with the movable part of the exhaust rail 7k limiter fixed on it, is at the level of the fixed part of the parking position limiter of the exhaust rail 1 5, and the traverse 1 6 is in the upper position. The movable part of the exhaust rail exhaust 7k is connected with a fixed part of the parking position trailer exhaust rail 1 5, the signal from which is fed to the input 28 of the control unit 22, and the movable part of the trailer 16K traverse is connected to the fixed part of the trailer upper position of the traverse 12, s chased with which arrives at the input 30 of control unit 22.

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SUBSTITUTE SHEET (RULE 26) When the control unit 22 on the solenoid valve 32 of the pneumatic drive of the exhaust rail 8 is given a signal, then the pneumatic line of the exhaust rail (not shown in Fig.) Gives air, and the pneumatic actuator 8 moves the exhaust rail 7 from the stationary part of the parking position limiter of the exhaust rail 1 5 (lower the edge of the bag) to the distance to one of the fixed parts of the limit switch 14 (1-V), defining the size of the bags (this limit switch is selected by the switch 27). When this movable part of the trailer exhaust rail 7k is connected to one of the fixed parts of the trailer, defining the size of the bags I 4 (lV), the signal from which is fed to one of the inputs 29 (1-V) of the control unit 22.

Layers of air-permeable thermoplastic material from roll holder I along transporting rollers 2 by means of exhaust rail 7, which moves along the signal from output 34 of control unit 22 supplied to solenoid valve 32 by means of pneumatic drive exhaust rail 8, are fed from workpiece separator to upper and lower layers 4 on the counterpart of the frame 10. In this case, the air-permeable thermoplastic material is pulled from the rolls and placed above and below the workpiece separator onto the upper and lower layers 4, forming the upper and lower layers and bag blanks consisting of 1-3 layers of thermoplastic material (depending on the type of bag being made).

After drawing the material to the desired length, the solenoid valve of the exhaust rail 32 closes according to the signal from the output 34 of the control unit 22, the movable part of the exhaust rail of the exhaust rail 7k opens from one of the stationary parts of the exhaust that determine the size of bags ί 4 (1 -V), after which the exhaust rail 7 together with the movable part of the exhaust rail 7k trailer part returns to the fixed part of the parking position exhaust trailer 1 5, while the movable part of the exhaust rail 7k trailer is connected to the fixed part of the position trailer pas forging exhaust slats 1 5. The signals from the limit switch fixed portions defining various bag 14 (1- V) and a fixed part trailer parking position exhaust slats 1 5 transmits to respective inputs 28 and 29 (1-V).

The signal coming to the solenoid valve of the yoke 33 from the output 35 of the control unit 22 of the yoke 16 from the upper position from the fixed part of the limit switch of the upper position of the yoke 1 2 begins to fall down, while the fixed part of the limit switch of the upper position of the yoke 1 2 and the movable part of the limit beam of the traverse 1 open 6k attached to the traverse 1 6. The traverse 16 is lowered to the fixed part of the low limit switch traverse 13, where the fixed part

ten

SUBSTITUTE SHEET (RULE 26) 0360 the low limit switch of the traverse 13 and the movable part of the traverse of the cross beam 16k are connected, which is signaled to the input 3 1 of the control unit 22.

In this case, the frame with heating elements 9 is lowered onto the workpiece separator on the upper and lower layers 4 and on the counterpart of the frame 10. The nichrome strings 18, 19 (1-V), or frames 2 I (IV), are lowered into the grooves of the fluoroplastic strips silicone rubber 1 1, nichrome rings 20 (IV) - in the grooves of ringlets made of fluoroplast-silicone rubber 1 1. In the case when nichrome frames are used, they fall into the grooves of fluoroplast-silicone rubber frames.

The signal received from the fixed part of the trailer of the lower position of the yoke 13, formed when it is in contact with the movable part of the traverse of the yoke 16k, in the control unit 22 starts a timer 23, which delays the switching of the heating elements (nichrome strings 1 8, 1 (1-V), or nichrome frames 2 I (IV) and nichrome rings 20 (IV)) with power supply 24 for 0.5-1.5 sec. During this time, the pressure in the pneumatic network is stabilized and the frame movement with the heating elements 9 is extinguished.

Next, the power source 24 is connected to the nichrome threads 1, 8, 19 (IV), or to the nichrome frames 21 (IV) and to the nichrome rings 20 (1-V) for the time specified by timer 23. Timer 23 for 0.2 to 3 seconds, the power source 24 commutes with nichrome strings 1 8, 1 (1- V), or with nichrome frames 2 1 (IV) and with nichrome rings 20 (IV), as a result of which a constant electric current of 9-12 is supplied to the heating elements volt. Due to this, the transverse nichrome string 1 8 welds the transverse seam, which is also the lower seam in the manufactured blanks and the upper one in the subsequent ones, separating the manufactured blanks of bags from the material rolls on roll holder I, nichrome strings 19 (1-V), or frames 2 I ( IV) weld longitudinal seams, nichrome rings 20 (1-V) burn holes in the upper layer of the billet blanks of the next cycle.

After a specified time, a signal is sent to the inlet of the solenoid valve 33 by which the pneumatic actuators of the traverse 1 7 open and return it to its original position by moving up to the position of the fixed part of the upper position switch of the traverse 12.

Then the cycle is repeated.

Upon completion, press the "Stop" button, de-energizing the device.

Get the billet thermoplastic bags for vacuum cleaners with smooth (without chipping) welds, made around the perimeter, round shape with a thickness of 0.6-0.7 mm, strength 2-5 kg / cm.

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SUBSTITUTE SHEET (RULE 26) The manufactured blanks of thermoplastic bags are products of two multi-layered (depending on how many rolls are installed on the roll holder) rectangles, or rectangles with rounded corners, with a hole on one of the sides.

Performing the response parts of the heating elements (rings 5 and strips I I, or frames) of fluoroplast-silicone rubber improves the quality of the welds and edges of the holes being burned due to better surface tension of the melt of the air-permeable thermoplastic material in their grooves of a semicircular cross-section. Improving the quality of the welds and edges of the holes being pierced is facilitated by the optimal heating time of the nichrome heating elements, maintained by a timer in the control unit, during which the power supply is switched with the heating elements. The use of a timer and direct current with a voltage of 9–12 volts to heat the nichrome heating elements contributes to the reduction of electricity consumption.

In this case, the device is quite simple to manufacture and maintain.

Example.

The proposed group of inventions can be implemented in a semi-automatic machine, on which the blank blanks for vacuum cleaners are made.

Overall dimensions of such a machine: 1 1 00/2500/1 850 mm.

The device uses double-acting pneumatic cylinders with a diameter of 50 mm, of various lengths from 350 mm to 850 mm.

Magnetic sensors are used as limit switches (they are mounted on a cylinder (according to labels obtained experimentally).

For the manufacture of the command node, K555ТМ7, К 1 55ТМ7, КР 1 533Т 7, SN74ALS75 (analogue of KP I 533TM7), SN74LS75 (analogue К555ТМ7), SN7475 (analogue К 1 55Т 7) chip are used.

On the machine it is possible to make, for example, the following options for bags:

- two-layer dust-holding bags for household and industrial vacuum cleaners with the size of 600x300 mm, 600x450 mm;

- three-layer dust-retaining bags for household and industrial vacuum cleaners with the size of 600x300 mm, 600x450 mm.

For the manufacture of a double-layer bag, 4 layers of material are used: spunlate meltblown spunbond (CMC) - spunlate spunbond (SS) - spunlate spunbond (SS) - spunlate meltblown spunbond (CMC). Spunlate meltblown spunbond (CMC) is used

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SUBSTITUTE SHEET (RULE 26) 18 000360 as a reinforcing-filtering layer that holds particles up to 20 microns. Spunlate spunbond (SS) is used as a coarse filter and as a protective layer to reduce the kinetic energy of heavy particles arriving to 1 00 microns, to prevent damage to the bag. The thickness of the seam and the thickness of the double-layer bag are 0.6 mm, the tensile strength - 29.41 N - 68.64 N per 1 cm of the seam.

For the manufacture of a three-layer bag, 6 layers of material are used: spunlate meltblown spunbond (CMC) - meltblown (M) - spunlet spunbond (SS) - spunlate spunbond (SS) - meltblown (M) - spunlate meltblown spunbond (CMC). Spunlate meltblown spunbond (CMC) is used as a reinforcing-filtering layer that holds particles up to 20 microns. Meltblown (M) is used as a fine filter that holds particles up to 1 micron. Spunlate spunbond (SS) is used as a coarse filter and as a protective layer to reduce the kinetic energy of heavy particles arriving to 100 microns, to prevent damage to the bag. The thickness of the seam and the thickness of the three-layer bag are 0.7 mm, the tensile strength - 29.4] H - 68.64 N per 1 cm of the seam. The thickness of the seam and the thickness of the three-layer bag are 0.7 mm, the strength to burst - 29.41 N - 68.64 N per 1 cm of the seam.

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SUBSTITUTE SHEET (RULE 26)

Claims

CLAIM

one . A device for making blanks of thermoplastic bags for vacuum cleaners contains a roll holder with conveying rollers, a table, a billet separator on the upper and lower layers, on which rings made of fluoroplastic silicone rubber are fixed with grooves, an exhaust rail equipped with a trailer consisting of a movable part of an exhaust trailer slats, fixed part of the trailer position of the exhaust rail and fixed parts of the limit switch, defining the size of the bags, pneumatic drives of the exhaust rail with electric rotary valves of the exhaust rail, frame with heating elements, made in the form of transverse nichrome string, longitudinal nichrome strings and nichrome rings, counterpart of the frame, on which strips of fluoroplast-silicone rubber, made with grooves, traverse, fitted with a stop consisting of a movable parts of the traverse traverse, the fixed part of the trailer of the upper position of the traverse and the fixed part of the trailer of the lower position of the traverse, pneumatic drives of the traverse with solenoid valves, traverse A control unit with a timer and a power source, control buttons “Start”, “Stop” and a switch of the bag size, while on the table the workpiece separator is fixed on the upper and lower layers and the counterpart of the frame is installed, the movable part of the exhaust trailer is installed on the exhaust rail slats made with the ability to move between the fixed part of the trailer of the parking position of the exhaust rail and the fixed parts of the trailer, defining the size of the bags, the fixed part of the parking position trailer of the exhaust rake and fixed parts of the trailer, defining the size of the bags have corresponding electrical connections to the inputs of the control unit, the frame with heating elements is axially mounted above the counterpart of the frame and above the workpiece separator on the upper and lower layers in such a way that the nichrome rings are axially mounted above the grooves of fluoroplastic ringlets silicone rubber, and the nichrome strings are axially mounted above the grooves of the strips of fluoroplast-silicone rubber, the frame with heating elements is mechanically coupled a traverse with a traverse, a movable part of the traverse trailer is mounted on the traverse, which is movable between the fixed part of the traverse of the upper position of the traverse and the fixed part of the trailer of the lower position of the traverse, the fixed parts of the trailer of the upper and lower positions of the traverse have electrical connections with the corresponding and control unit inputs,

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SUBSTITUTE SHEET (RULE 26) exhaust rail drives and pneumatic drives of the crosshead are controlled by signals sent to their solenoid valves from the corresponding outputs of the control unit, and the heating elements have corresponding connections with the outputs of the control unit and are connected to a power source in it for a time determined by a timer.

2. The device according to claim. 1, characterized in that the workpiece separator on the upper and lower layers is fixed on the table by means of a support.

3. The device according to claim 1, characterized in that in space the separator of the workpiece on the upper and lower layers and the frame with heating elements and elements, preferably, are arranged horizontally, at the same level.

4. The device according to claim 1, characterized in that the fixed part of the parking position limit switch of the exhaust rail is fixed on the table support, and the fixed parts of the limit switches defining the size of the bags are fixed on the side surface of the table so that they can be contacted. with movable part of exhaust trailer rail.

5. The device according to claim 1, characterized in that the fixed parts of the upper and lower limit switches of the traverse are fixed on one of the pneumatic cylinders of the traverse so that they can be contacted with the movable part of the traverse.

6. The device according to claim. 1, due to the fact that the exhaust rail is connected to pinion bearings.

7. The device according to claim 1, differing in that the frame with the heating and elements is made of aluminum profiles, on which removable blocks with heating elements are fixed.

8. The device according to claim 1, characterized in that the heating elements are made in the form of a transverse nichrome string and nichrome frames, while the transverse part of the frame is fixed transverse strip of fluoroplast-silicone rubber, made with a groove, and the frame of fluoroplastic-silicone rubber made with grooves, the transverse nichrome string being axially mounted above the groove of the transverse strip of ftplast-force and horse rubber, and the nichrome frames axially mounted above the grooves of fluoroplastic-silicone rubber .

9. A method of making blanks of thermoplastic bags for vacuum cleaners, carried out on the device according to claim 1, includes fixing the switch of the bag size in a certain position by selecting one of the fixed parts of the trailer that define the size of the bags, each of which corresponds to one or

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a different length of the bag blank, starting the cycle for manufacturing thermoplastic bag blanks by pressing the “Start” button, which pulls the air-permeable thermoplastic material from the roll holder over the transport rollers and places it above and below the workpiece separator onto the upper and lower layers, feeding the air-permeable thermoplastic material from the spacer on the upper and lower layers on the mating part of the frame with the help of exhaust rail, moved by means of pneumatic actuators of the exhaust rail, which, in turn, controlled by signals coming to the exhaust rail solenoid valves from the corresponding output of the control unit, returning the exhaust rail to its original position after drawing the material to the desired length, lowering the crosshead connected to the frame with heating elements, which are in turn signals from the solenoid valves are controlled by the crosshead from the corresponding output of the control unit, in which the frame with heating elements It is applied to the workpiece separator on the upper and lower layers and to the counterpart of the frame in such a way that the nichrome strings are lowered into the grooves of fluoroplastic-silicone rubber strips, and the nichrome rings are lowered into the grooves of fluoroplastic-silicone rubber rings, stabilizing the pressure in the pneumatic network and quenching the movement frames with heating elements by means of a timer, which carries out a delay of switching of heating elements with a power source for 0.5-1.5 seconds, further connecting the power source to the heating element m at a time of 0.2-3 seconds, determined by a timer, whereby using a transverse nichrome string, a transverse weld is welded, which is also the lower seam in the produced blanks and the upper one in the blanks of the next cycle, separating the produced blanks of the bags from the material rolls on the roll holder, using longitudinal nichrome strings, weld longitudinal seams, and with the help of nichrome rings burn holes in the upper layer of the blanks of the next cycle, further movement of the cross bar to the top its position, completion of work by pressing the "Stop" button.

1 0. The method according to p. 9, characterized in that for the manufacture of the first bag, the breathable thermoplastic material is pulled from the roll holder through the transport rollers and placed on the counter part of the frame on the table manually.

eleven . The method according to claim. 9, characterized in that the movement of the exhaust rail limit and limit switch, consisting of a movable part of the limit switch exhaust rail mounted on the exhaust rail, the fixed part of the limit switch parking position

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exhaust rail and fixed parts of the trailer, defining the size of the bags, and the movable part of the trailer exhaust rail is arranged to move between the fixed part of the trailer position of the parking exhaust rail and fixed parts of the trailer, defining the size of the bags.

12. The method according to p. 9, characterized in that the movement of the bar is limited by a trailer consisting of a movable part of the traverse bar fixed on the traverse, a fixed part of the trailer of the upper position of the traverse and a fixed part of the trailer of the lower position of the bar, and the movable part of the traverse bar is made the ability to move between the fixed part of the trailer of the upper position of the traverse and the fixed part of the trailer of the lower position of the traverse.

1 3. The method according to p. 9, characterized in that for the manufacture of bags with rounded corners using heating elements made in the form of a transverse nichrome string and nichrome frames, while on the counterpart of the frame using a transverse strip of fluoroplast-silicone rubber, made with a groove, and a frame made of fluoroplast-silicone rubber, made with grooves, the transverse nichrome string being axially mounted above the groove of the transverse strip of fluoroplast-silicone rubber, and the nichrome frames axially mounted You are above the grooves of a frame made of fluoroplast-silicone rubber.

1 4. The method according to p. 9, characterized in that for the manufacture of blanks double-layer bags using 4 layers of material: spunlet meltblown spunbond (CMC) - spunlet spunbond (SS) - spunlate spunbond (SS) - spunlate meltblown spunbond (CMC).

15. The method according to p. 9, characterized in that for the manufacture of blanks of three-layer bags using 6 layers of material: spunlayt meltblown spanbond (CMC) - meltblown (M) - spunlate spunbond span (SS) - spanlet spunbond (SS) - meltblown (M) - spunlate meltblown ).

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