PL103016B1 - EQUIPMENT FOR SEALING PACKAGING MADE OF THERMOPLASTIC MATERIAL, ESPECIALLY IN PACKING MACHINES FOR CIGARETTE OR SIMILAR ARTICLES - Google Patents

Description

The subject of the invention is an ear device sealing thermoplastic packages especially in cigarette wrappers or items such as this unit is designed to run in sequence 5 along the packing line, moving in motion intermittent at different speeds on one or several stations, each one of them or several of these devices work in conjunction with elements that give it a return movement. 10 The subject matter of the invention relates generally to the packaging hand, and in particular the wire-imposing machines Secondary packaging, that is, the machines to be used It is a wrapping in sheets of transparent paper clean goods previously packed in 15 packaging, generally in the shape of a parallelism nu.

For reasons of hygiene as well as for dispatch more aesthetic appearance, packages, especially not cigarettes, they are usually wrapped and sealed in sheets of transparent paper on a mat rails mentioned above.

The packing method normally used for requires these products according to the state of the art ki, the application of the sealing operation on page 25 longitudinal and at two opposite ends of kaz-v my package.

The use of these has been increasing for some time plastic machines are thermally welded which, in comparison with conventional plastics, 30 you (such as the material being sold under the trade name "Cellophane") represents numerous advantages, but one that has particular needs especially when making the seal nanny on packages.

The advantages lie in the state of the art on the fact that this type of material is cheaper than "Collophane" and being thinner allows for use scan from a spool of the same size meaning no more packages.

However, problems arise in relation to the temperature limits which, for this material, must be It is necessary during the thermal sealing operation to be more rigorously maintained than for example clade in the case of "Cellophane".

Below and above this upper limit of the occurrence it is the phenomenon of a very significant shrinkage of the mass material and consequently ugly folds, which especially in soft packets values may cause the packaging to crack.

Other problems were caused by a particular pain heat effect of this thermoplastic material but they do occur during thermal operations sealing, even at best conditions of temperature, pressure and duration contact. While indeed, when using the "Cel lophane ^ "only occurs, as is known, melting of outer layers of moisture-resistant la¬ heart when a hot mechanism is attached sealing - but there are no changes 103016 * 0fc0l6 3 in an inner viscose trims layer in the case of thermoplastics the same phenomenon occurs on their entirety this thickness. It is understandable that the distortions that re are the inevitable result of this operation, sa more noticeable on thermoplastics tics.

Defects of this kind are found in the sub-area directly given by the mechanism's influence sealing, and in the areas surrounding the reception area they take the form of shrinkage, undulations and waves packing material.

The technique used in this regard is aimed at elimination or to any degree reducing these previously mentioned difficulties carried by the careful location of the heat to the through the sealing mechanism, in bar a limited number of zones per package, one in a way that would ensure the operation sealing will be fully successful done perfectly.

For example, mechanisms have been constructed seals, consisting of a fixed wheel seas that contain a source of heat and possess one or more narrow holes at the site ^ in which is a wall that serves not only as a means thermal insulation, but also as a guide for stack of intermittently moving parcels wrapped in their thermoplastic packaging.

While the stack is idle, the operation takes place sealing those spheres of packaging that they know they dig at the openings connecting the chamber. Source the lem of heat that is so set as to Nolite way could provide heat to different distribution points is hot, for example air or electric resistors. Including the last one in this case, the sealing mechanism is ineffective Konany in the form of thin strips attached in these holes, or moving in them post-reverse movement.

Despite these methods used, the use of thermoplastics in packaging machines with a color high-performance dzo can cause that the previously described phenomena will intensify and arise to new requirements for a satisfactory result sealing operation.

For example, especially with regard to ma rails for packing cigarette packets w sheets of transparent material, paper packages the words on this machine move one by one for the second intermittently along the working line packing line, with different speeds, for to submit them to positions, the number of which is variable for adaptation to speed, performance sealing mechanisms connected to the el mentions that make them work in motion progressive feedback.

The direct result of high frequency sealing operations on these machines is difficult ability, using mechanisms of known types, temperature drop of the sealing mechanisms within a short time, below the lower limit of the permissible for melting the thermoplastic.

For this reason, it is necessary not only to search no mechanisms with more flexible nosc, to provide dcjbregp: wykohaiva ope¬ sealing ration on these high-speed machines, but also constantly checking the temperature in no time indirectly close to the sealing zone.

Referring to the use of this special word The packaging material is even more so necessary that machines of this type can work at different speeds and at slower speeds snip, the sealing mechanisms are from known water overheated above the upper limits, which in the consequences causes damage to the packaging.

The object of the invention is therefore to make devices for sealing packages made of therm moplastic packaging material in which rhyme you will be able to combine the characteristic exclamation the connection of this thermoplastic with the shaft conditions occurring with the use of packaging machines wujacych with very high efficiency; it means with the need for a very fast recovery from mechanism seals back temperature * - after each operation and the possibility of continuous checking the temperature in the vicinity of each sealing zones.

The subject of the invention is therefore a device for sealing plastic packages thermoplastic for the machines they pack for example, cigarette packets sequentially along the wrapping line in a dashed motion at different speeds on one or several towards the positions; »One or more such devices, works, combined with the means of making the it performs a forward and reverse motion; major The features of this device are that the device turns on has a sealing element constituting the body, essentially wedge-shaped with a vertex forms the sealing lip facing the line package tabs, the body having a cross section allowing to contain a source of heat and water probe tips for measuring and checking temperature 40 turns, in the immediate vicinity of the top of the wedge.

The device also has plates of thermally iso-material shapewear shaped in such a way that in time sealing operations are in between mechanism body and thermoplastic packaging tangent directly adjacent to the contact zone the sealing tip.

Further characteristics and benefits flowed The aspects of the invention follow from the one below a detailed description of a preferred embodiment of the device according to the invention mounted on two different ways on the same packing machine.

The subject matter of the invention is illustrated only not as a non-limiting example on the accompanying in which Fig. 1 shows the fuel wheel forging, belonging to the aforementioned packing machine, equipped with the devices constituting the subject of the invention, in a side view, Fig. j2, is a guide sewn in this machine channel, which is also equipped with devices according to the invention, v view perpendicular to the direction of movement of the package in this channel.

When referring to Fig. 1, the numeral 1 has been indicated next to the packaging, which rotates in motion, stops clockwise around 65 of the horizontal shaft 2. Circle 1 has six radially 45 50 55 60103018 6 rooms 3 and each of them in turn is located while the wheel stops in the middle of the position corresponding to input station I, insert a long pack of P cigarettes is delivered to him along the edge towards battle 2, together with the sheet S transparent thermoplastics it, which is used to make external fire forging. The two ends of a sheet of S material for fuel the jaws projecting radially from wheel 1 are na¬ steppes folded on the outside of the package P by a movable bending member 4 and a stationary one a bending member formed by the tail edge shaft of a fixed guide 5 that runs along circle 1 outline around 180 ° on the hatch, as far as the point, in which the pusher 6 pushes the parcel out of the state ejection rods.

Accordingly, where the second station is located novelty II and third position III, in; places, in which the guide 5 is interrupted operate there are two sealing mechanisms 7 and 7 'on the connection secured to the supports 8 and 8 '; drive for their movements in the directions to and from the country According to circle 1 they receive from, in or around V9 resp not 9 ', which are paralleled * a 2. Jtfecbani-r these senses make an oscillating motion around their shaft cows. Sealing mechanisms 1 and 7 are designed from rods with a cross-section approximately similar to the wedge, with the top of the wedge / forming the cone sealing tip directed to circle 1 to the box forging. This particular form is of purpose enabling sealing operations to be performed in a place where on the outside of ¦¦- each the package has a narrow strip, and at the same time in the box in the vicinity of a heat source 10 or 10 'tfcreation for example from an electric resistor and a con probe leads 11 relatively for temperature measurement tubes, inserted into the body of each mechanism of the sealing system 7 or 7 'directly the proximity of the sealing tip. This arrangement as expected, the result was very much quick temperature recovery and possibility constantly checking it in the seal mechanism during the operation directly on the warce, at her different working speeds.

Items 12 and 12 'are two material plates insulating material attached to the guide 5, which they extend along the outer surfaces P parcels, with the exception of the zone in which they work sealing mechanisms 7 and 1 ': The task of these plates is to protect the packaging in the immediate the proximity of the sealing zone against the heat irradiated by the surfaces of the mechanisms sealants.

In Fig. 2, which is an example of a second use Using the device according to the invention shown is the cross-section of the outlet channel 13 blacksmiths. At the point corresponding to this cross section has two opposing sealing mechanisms 14 and 14 'serve to seal the two ends of the band the check of the moving forward stops on the bottom of channel 13. Completely the same as for the previously mentioned sealing mechanisms 7 and 7 ', them the supporting elements 15 and 15 'give the with sealing pin 14 and 14 'approaching movement to the walls of channel 13 and away from these walls; are of course they are equipped with a 10, 10 'heat source with probes 11, 11 'in close proximity to them sealing ends. 16 'and 16' plates, which they are practically in contact with these two ends of the packages in the place corresponding to this . cross section and which have a fissure possible operation of the sealing mechanisms 14 and 14 ', fulfill the same function as before described for plates 12 and 12 '.

. As an example, insulating plates 12, 12 ', 16 and 16 'in a stationary position with respect to packaging line (wheel 1 and channel 13) and in relation to for 7, 7 ', 14 and 14' sealing mechanisms, it is obvious that they can be movable downwards a slow way, but in such a way as to ensure that they would be in. position shown at the time of work in the sealing operation between the mechanism sealing systems and outer packaging made of weldable plastic.

Claims (3)

Patent claims 1. Apparatus for sealing packages made of thermoplastic material, in particular in cigarette wrappers or similar articles, which the apparatus is adapted to operate sequentially along a control line moving with different speeds at one time. or several and 35 workstations, on each of which one or several of these devices work in conjunction with the elements that give return motion, characterized by the fact that it is equipped with a sealing element (7), (70, (14), (14 ') constituting a substantially wedge-shaped body, the apex of which is a sealing edge facing the line of the package flap, and which has a cross-section that allows a source of heat to be kept in direct proximity to this edge (10), (10') the probe tips (11), (110 45 for measuring and checking the temperature and the plates (12), (130, (16), (1 * 0 made of thermally insulating material and positioned so that during For sealing, they are located between the body of the mechanism and the thermoplastic package (S), exactly adjacent to the contact area of the sealing tip. ' 2. Device according to claim 3. The method of claim 1, characterized in that the plates (12), (120, (16), (16 ') made of thermally insulating material are stationary with respect to the tab line 55 and the sealing mechanisms (7), (70, (14), (14 '). 3. Device according to claim The method of claim 1, characterized in that the plates (12), (120, (16), (16 ') are movable relative to the line of the tab and the sealing mechanisms (7), (70, (14), ( 14 '). 103016 f 3- ^ 5 {8. WZGraf. Main Zdra - 2514/80 - 95 Price PLN 45