CN110039685B

CN110039685B - Thin-wall pipe waste recovery device

Info

Publication number: CN110039685B
Application number: CN201910467706.1A
Authority: CN
Inventors: 曹玉; 毛潞
Original assignee: Chongqing Ruiting Plastic Co Ltd
Current assignee: Chongqing Ruiting Plastic Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2021-05-28
Anticipated expiration: 2039-05-31
Also published as: CN110039685A

Abstract

The invention relates to the field of film manufacturing, and particularly discloses a thin-walled tube waste recovery device which comprises a crusher and a fan, wherein a cutter and a filter screen are arranged in the crusher, the thin-walled tube waste recovery device also comprises a swinging unit for driving the filter screen to swing, a swinging rod is rotatably connected to a crusher shell and is positioned above the filter screen, one end of the swinging rod abuts against the end part of the filter screen, a knocking hammer is connected to the swinging rod, and the knocking hammer can collide with the filter screen after rotating along with the swinging rod. This scheme is through wobbling filter screen and hammer for vibrations when the filter screen wobbling, and then solve among the prior art that the mesh of accumulator is stopped up to bold film piece after insufficient and the cutting of waste material cutting, hinder the problem that tiny film piece whereabouts was retrieved.

Description

Thin-wall pipe waste recovery device

Technical Field

The invention relates to the field of film manufacturing, in particular to a thin-walled tube waste recovery device.

Background

With the progress of human science and technology, plastic films are used more and more widely, the demand of the films is more and more large, in the prior art, the films can be produced by a blow molding machine, the films formed by the blow molding machine are thin-walled tubes, the thin-walled tubes need to be flattened to form a fitted double-layer film before the thin-walled tubes are wound into film rolls, waste materials on two side edges of the double-layer film are cut off by a cutting knife to form two single-layer films, and finally the single-layer films are wound; the waste materials in the process generally fall into a recovery bin to be accumulated, and are manually taken out for recycling after a certain amount of waste materials are recovered, so that the recycling process is long, the utilization efficiency is low, and serious resource waste and environmental pollution are easily caused.

In order to solve the problem, the chinese utility model patent with publication number CN206899581U discloses a film rim charge recycling machine among the prior art, should retrieve the machine and include cutting knife, accumulator and fan, be equipped with cutting knife and accumulator in the accumulator, be equipped with the cutting fin in the accumulator, make rim charge (being the waste material) can be cut by cutting knife and cutting fin simultaneously through the cooperation of cutting fin and cutting knife, therefore more abundant to the cutting of film.

Although the film scrap recycling machine can cut waste materials more fully, the waste materials of the film are cut by the cutting knife to form soft film fragments with different sizes, the small film fragments fall from the recycling tank along with the increase of the cutting quantity of the film, and then the film fragments are pumped into the film production forming device by the fan to be directly utilized, large film fragments cannot fall from meshes of the recycling tank due to large volume, so that the film fragments are accumulated at the bottom of the recycling tank, and the accumulated large film fragments cannot be cut by static cutting fins due to softness on one hand, so that the purpose of fully cutting the waste material film cannot be achieved; on the other hand, the large film scraps are tightly attached to the inner wall of the recovery tank under the action of the fan, so that meshes of the recovery tank are blocked, and falling and recovery of the fine film scraps are hindered.

Disclosure of Invention

The invention aims to provide a thin-wall pipe waste recovery device to solve the problems that waste is not cut sufficiently, large film scraps after cutting block meshes of a recovery tank, and fine film scraps are prevented from falling and being recovered in the prior art.

In order to achieve the above object, the basic scheme of the invention is as follows:

thin-walled tube waste recovery device, including rubbing crusher and fan, be equipped with cutting knife and filter screen in the rubbing crusher, still including driving the wobbling swing unit of filter screen wobbling, it is connected with the pendulum rod to rotate on the rubbing crusher shell, the pendulum rod is located the top of filter screen, the one end of pendulum rod offsets with the tip of filter screen, be connected with on the pendulum rod and strike the hammer, strike the hammer and can collide the filter screen along with the pendulum rod rotation back.

The working principle is as follows: after the waste of the thin-walled tube enters the pulverizer, the waste is cut by a cutting knife of the pulverizer to form thin film fragments, the fine thin film fragments fall through the filter screen, and the large thin film fragments originally falling on the bottom of the filter screen rise again along with the swinging of the filter screen to be contacted with the cutting knife and are cut again by the cutting knife, and the fine thin film fragments have smaller volume, so that the fine thin film fragments are screened out when the filter screen swings; meanwhile, in the process of swinging the filter screen, the end part of the filter screen pushes the swing rod to rotate, the knocking hammer connected to the swing rod also rotates along with the swing rod, the knocking hammer can collide with the filter screen after rotating, the filter screen can vibrate under the impact of the knocking hammer, and fine film scraps are shaken off.

Compare the beneficial effect in prior art:

firstly, large film chips can be cut again by the cutting knife under the swinging of the filter screen, and compared with the situation that the large film chips cannot be fully cut in the prior art, the large film chips can be rolled into the cutting knife again for cutting through the swinging filter screen; on the other hand, after the large film scraps are taken away, the probability that the large film scraps block the meshes of the filter screen is reduced, and the falling of the fine film scraps is facilitated.

The second drives the wobbling in-process of filter screen at the swing unit, sieves the film piece after cutting in other words, compares as the fixed accumulator of filter screen among the prior art, and the accumulator can not swing, and the clastic ability of tiny film of screening is relatively poor, and wobbling filter screen makes in this scheme improve greatly to the clastic screening ability of film for the crushing screening efficiency of thin wall pipe waste material is favorable to the clastic recycle of tiny film.

Third, when the filter screen swing, drive the pendulum rod and rotate, the hammer of knocking of connecting on the pendulum rod collides on the filter screen, make the filter screen vibrations, the filter screen of vibrations makes accumulational film piece loose by shaking on the one hand, tiny film piece is along with vibrations and relative bold film downstream, be favorable to tiny film piece and the clastic quick separation of bold film, and make tiny film piece pass through the mesh of filter screen fast, the tiny film piece that is sieved simultaneously is taken out fast by the fan and is separated, thereby make thin wall pipe waste recycling's cycle short and efficient.

Furthermore, the knocking hammer is fixedly connected with the swing rod through a first elastic piece.

Has the advantages that: when the swing rod rotates to the state that the knocking hammer collides with the filter screen, the knocking hammer and the filter screen are extruded in front, and the first elastic piece is compressed to accumulate elastic potential energy; when the filter screen swings to be separated from the support of the swing rod, the swing rod rotates in the opposite direction under the action of gravity, the elastic potential energy of the first elastic part is released, the filter screen is continuously knocked by the knocking hammer under the damping vibration of the first elastic part, the vibration time and the vibration amplitude of the filter screen are increased, and the falling of fine film fragments is further facilitated.

Furthermore, a plurality of protrusions which are irregularly distributed are arranged on the surface of the knocking hammer.

Has the advantages that: the filter screen is in the protruding existence for the filter screen is in the back of conflicting with the hammer that strikes, strikes hammer surface irregular distribution's arch and plays stirring effect to the mesh of filter screen, further increases the vibrations of filter screen.

Further, still include pivoted cutting axle in the rubbing crusher, the swing unit is including rotating the pivot of connection on the rubbing crusher shell, pivot and filter screen fixed connection, fixedly connected with gear in the pivot, cutting knife fixed connection is epaxial at the cutting of rubbing crusher, the epaxial fixedly connected with sector gear of cutting, gear and sector gear meshing.

Has the advantages that: the rotation of the cutting shaft is utilized to drive the sector gear to rotate, the swing of the filter screen is realized through the gear, and after the sector gear is disengaged from the gear, the filter screen rotates under the self gravity, and the purpose of reciprocating swing of the filter screen is further achieved.

Furthermore, a second elastic piece is connected between the end part of the filter screen and the shell of the pulverizer.

Has the advantages that: after the filter screen is driven to swing by the sector gear, the second elastic part deforms, elastic potential energy is accumulated, after the sector gear is disengaged from the gear, the filter screen rapidly rotates under the action of self gravity and the elastic force of the second elastic part, the reciprocating swing frequency of the filter screen is made to be higher, and the screening of tiny film fragments is further facilitated.

Further, fixedly connected with third elastic component in the casing of rubbing crusher, the tip fixedly connected with fore-set of third elastic component, the fore-set can offset with filter screen and tensile second elastic component.

Has the advantages that: after the second elastic component takes place deformation along with the swing of filter screen, the fore-set offsets with the second elastic component to the fore-set compression third elastic component, when the elasticity of second elastic component and filter screen gravity drive the filter screen gyration, the fore-set breaks away from the offset with the second elastic component, and then the fore-set offsets with the filter screen fast under the spring action of third elastic component, thereby forms the striking to the filter screen, further improves the vibration frequency of filter screen.

Further, be equipped with a plurality of recesses on the filter screen, sliding connection has the ejector pad in the recess, fixedly connected with fourth elastic component between ejector pad and the recess bottom.

Has the advantages that: in the process of rotating along with the filter screen, the push block on one side of the rotation direction of the filter screen is driven to a relatively higher position along with the swinging of the filter screen, along with the continuous upward movement of the push block, the force of the push block for pressing the fourth elastic piece is continuously reduced, meanwhile, the film fragments originally pressed on the push block are also reduced, the push block moves towards the outside of the groove under the combined action of the elasticity of the fourth elastic piece, the reduced pressure of the film fragments and the centrifugal force provided by the filter screen, along with the increase of the push length of the push block, the push block pushes the film fragments to the cutting knife, and the full cutting of large film fragments is facilitated; on the other hand, the fourth elastic component is after pushing out the ejector pad, because the damping of fourth elastic component is vibrate, one can drive the ejector pad constantly along the reciprocal slip of recess to play the clastic effect of promotion film, two come, the vibrations that the damping was vibrated the production transmit the vibrations that also further increase the filter screen for the filter screen through the fourth elastic component.

Further, the filter screen is the arc, be equipped with the baffle along the axis symmetry of filter screen in the casing of rubbing crusher, the outer convex surface of arc of filter screen pastes with the baffle mutually.

Has the advantages that: through setting up the baffle for the film piece is unlikely to directly spill over in the filter screen at the wobbling in-process of filter screen, has ensured that the abundant film piece of uncut can not mix with the tiny film piece that sieves down.

Further, the pulverizer is a double-shaft pulverizer.

Has the advantages that: the double-shaft crusher enables the number of the cutting shafts to be two, and the number of the cutting knives is doubled, so that the efficiency of the crusher for cutting the thin-walled tube is improved.

Further, the fan is a centrifugal exhaust fan, a material collecting groove is arranged in a shell of the pulverizer and located below the filter screen, the centrifugal exhaust fan comprises a negative pressure exhaust pipeline and a discharge pipeline, the negative pressure exhaust pipeline is communicated with the material collecting groove, and the discharge pipeline is connected with the thin-walled tube production device.

Has the advantages that: the negative pressure produced by the centrifugal exhaust fan is used for pumping the fine film fragments falling from the filter screen into the negative pressure exhaust pipeline, and then the fine film fragments enter the discharge pipeline through the inner cavity of the shell of the exhaust fan and enter the thin-walled tube production device through the discharge pipeline to be recycled.

Drawings

FIG. 1 is a front view of an embodiment of the present invention;

FIG. 2 is an elevational view of the arcuate screen in an embodiment of the present invention in a structural relationship with a shredder without the arcuate screen oscillating;

FIG. 3 is an elevational view of the arcuate screen in a clockwise oscillating motion in accordance with an embodiment of the present invention in structural relationship with a shredder;

FIG. 4 is an enlarged view of portion A of the embodiment of the present invention shown in FIG. 2;

FIG. 5 is a top view of the structural relationship between the arcuate screen, the swing unit and the housing in an embodiment of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a double-shaft crusher 1, a centrifugal exhaust fan 2, a machine shell 3, a cutting knife 4, a driving shaft 5, a driven shaft 6, an arc-shaped filter screen 7, a swing unit 8, a rotating shaft 9, a gear 10, a sector gear 11, a swing rod 12, a knocking hammer 13, a first spring 14, a protrusion 15, a second spring 16, a sliding groove 17, a third spring 18, a top column 19, a groove 20, a push block 28, a fourth spring 21, a baffle 22, a material collecting groove 23, a negative pressure air suction pipeline 24, a discharge pipeline 25, a thin-walled tube production device 26 and waste materials 27.

The embodiment is substantially as shown in fig. 1 to 5:

combine fig. 1 and fig. 5, thin wall pipe waste recovery device, including double-shaft crusher 1 and centrifugal air exhauster 2, double-shaft crusher 1 includes casing 3, cutting knife 4, driving shaft 5, the driven shaft 6, curved filter screen 7 and swing unit 8, driving shaft 5 and driven shaft 6 rotate to be connected on casing 3, driving shaft 5 is driven by the motor, driving shaft 5 and driven shaft 6 carry out the transmission through gear engagement in the casing 3 outside and connect, driving shaft 5 and driven shaft 6 are the cutting axle of

cutting knife

4, 4 fixed mounting of cutting knife are epaxial in the cutting, swing unit 8 drives curved filter screen 7 and swings.

Referring to fig. 1, a baffle 22 is disposed in the housing 3 and is symmetrical along the central axis of the arc-shaped filter screen 7, and the arc-shaped outer convex surface of the arc-shaped filter screen 7 is attached to the baffle 22. The double-shaft pulverizer 1 is characterized in that a material collecting groove 23 is arranged in a casing 3 of the double-shaft pulverizer 1, the material collecting groove 23 is located below an arc-shaped filter screen 7, a centrifugal exhaust fan 2 comprises a negative pressure exhaust pipeline 24 and a discharge pipeline 25, the negative pressure exhaust pipeline 24 is communicated with the material collecting groove 23, and the discharge pipeline 25 is connected with a thin-walled tube production device 26.

Referring to fig. 5, the swing unit 8 includes a rotating shaft 9 rotatably connected to the housing 3, a gear 10 is keyed on the rotating shaft 9, a sector gear 11 is keyed on the driving shaft 5, the gear 10 is engaged with the sector gear 11, and the rotating shaft 9 is fixedly connected to the arc-shaped filter screen 7.

With reference to fig. 2 and 4, a swing rod 12 is rotatably connected to the housing 3, the swing rod 12 is located above and to the left of the arc-shaped filter screen 7, the bottom end of the swing rod 12 abuts against the left end of the arc-shaped filter screen 7, a knocking hammer 13 is connected to the swing rod 12, the knocking hammer 13 is fixedly connected to the swing rod 12 through a first spring 14, the knocking hammer 13 can collide with the arc-shaped filter screen 7 after rotating along with the swing rod 12, and a plurality of protrusions 15 with irregular distribution are arranged on the surface of the knocking hammer 13; a second spring 16 is connected between the right end part of the arc-shaped filter screen 7 and the machine shell 3 of the double-shaft crusher 1, and a telescopic pipe is sleeved outside the second spring 16.

Referring to fig. 2, a sliding groove 17 is formed in the housing 3 of the double-shaft pulverizer 1, a third spring 18 is connected in the sliding groove 17, the right end of the third spring 18 is fixedly connected to the bottom of the sliding groove 17, a top pillar 19 is fixedly connected to the left end of the third spring 18, the top pillar 19 can abut against the arc-shaped filter screen 7 and the stretching telescopic pipe, and the top pillar 19 is slidably connected in the sliding groove 17.

Referring to fig. 4, the arc-shaped filter screen 7 is provided with a plurality of grooves 20, the grooves 20 are slidably connected with push blocks 28, and fourth springs 21 are fixedly connected between the push blocks 28 and the bottoms of the grooves 20.

The specific implementation process is as follows:

with reference to fig. 1, when the waste material 27 is recycled, the motor and the centrifugal exhaust fan 2 of the double-shaft pulverizer 1 are started, the driving shaft 5 rotates counterclockwise, the driven shaft 6 rotates clockwise, the driving shaft 5 and the driven shaft 6 drive the cutting knife 4 to rotate, and the negative pressure exhaust pipeline 24 of the centrifugal exhaust fan 2 generates negative pressure.

Waste material 27 gets into double-shaft grinder 1 after, waste material 27 is cut by the epaxial cutting knife 4 of the two left and right sides cutting in the double-shaft grinder 1, the film piece that forms after the cutting falls to arc filter screen 7 in, tiny film piece directly falls to material collecting tank 23 through the mesh of arc filter screen 7 in, the tiny film piece of whereabouts is taken out under the negative pressure effect and is driven to discharge tube 25 by centrifugal exhaust fan 2 through negative pressure suction pipe 24 in, and retrieve the recycle in entering into thin wall pipe apparatus for producing 26 through discharge tube 25.

When the arc-shaped filter screen 7 does not rotate, the state shown in fig. 2 is achieved, in this state, the left end portion of the arc-shaped filter screen 7 abuts against the bottom of the swing rod 12, the first spring 14, the second spring 16 and the third spring 18 are in a state without elastic deformation, and the ejection column 19 abuts against the arc-shaped filter screen 7 but does not have an acting force of mutual extrusion.

The process of clockwise swing of the arc-shaped filter screen 7:

with reference to fig. 2 to 4, in the process of counterclockwise rotation of the driving shaft 5, the sector gear 11 connected by a key on the driving shaft 5 drives the gear 10 to rotate clockwise, the gear 10 rotates to drive the rotating shaft 9 to rotate clockwise, and the arc-shaped filter screen 7 fixedly connected with the rotating shaft 9 also rotates clockwise; when the arc-shaped filter screen 7 rotates clockwise, the left end part of the arc-shaped filter screen 7 drives the swing rod 12 to rotate anticlockwise, the knocking hammer 13 connected with the swing rod 12 is gradually extruded by the rotating arc-shaped filter screen 7, and meanwhile, as the rotating angle of the swing rod 12 is increased, the first spring 14 is compressed to accumulate elastic potential energy; the right end part of the arc-shaped filter screen 7 drives the second spring 16 to stretch and accumulate elastic potential energy, meanwhile, along with the increase of the clockwise swing angle of the arc-shaped filter screen 7, the second spring 16 equivalently rotates anticlockwise, the second spring 16 pushes the ejection column 19 to move rightwards through a telescopic sleeve sleeved by the second spring 16, and when the ejection column 19 moves rightwards, the third spring 18 is compressed and accumulates elastic potential energy; the relationship between the swung arc screen 7 and the biaxial crusher 1 is in the state shown in fig. 3.

The process of the arc-shaped filter screen 7 swinging anticlockwise:

referring to fig. 3 and 4, when the sector gear 11 is disengaged from the gear 10, the elastic potential energy of the second spring 16 is released, and the arc-shaped filter screen 7 rapidly rotates counterclockwise under the action of its own weight and the elastic force of the second spring 16. In the process of anticlockwise rotating of the arc-shaped filter screen 7, firstly, the convex surface at the upper part of the left side of the arc-shaped filter screen 7 continuously collides with the protrusion 15 on the knocking hammer 13 to form vibration, along with the increase of the anticlockwise rotating angle of the filter screen, the left end part of the arc-shaped filter screen 7 gradually loses the supporting force on the swing rod 12, the swing rod 12 rotates clockwise under the action of self gravity and simultaneously drives the knocking hammer 13 to gradually leave the arc-shaped filter screen 7, after the knocking hammer 13 leaves the arc-shaped filter screen 7, the elastic potential energy of the first spring 14 is released, and meanwhile, the knocking hammer 13 can still continuously collide with the arc-shaped filter screen 7 due to the damping vibration of the first spring 14, so that the vibration frequency of; meanwhile, after the elastic potential energy of the second spring 16 is released, the top pillar 19 loses the support of the extension pipe on the second spring 16, and then the top pillar 19 is rapidly pushed out leftwards under the action of the third spring 18, the top pillar 19 impacts the arc-shaped filter screen 7, and meanwhile, the top pillar 19 still continuously collides with the arc-shaped filter screen 7 due to the damping oscillation of the third spring 18, so that the vibration duration of the filter screen is further prolonged.

In the process that the arc-shaped filter screen 7 swings clockwise (anticlockwise), the central line of the arc-shaped filter screen 7 is used as a boundary, the push block 28 in the left side (the right side when the arc-shaped filter screen 7 swings anticlockwise) of the arc-shaped filter screen 7 is brought to a relatively high position along with the swinging of the arc-shaped filter screen 7, along with the continuous upward movement of the push block 28, the force of the push block 28 for pressing the fourth spring 21 is continuously reduced, meanwhile, the film fragments originally pressed on the push block 28 are also reduced, the push block 28 moves towards the outside of the groove 20 under the combined action of the elastic force of the fourth spring 21, the reduced pressure of the film fragments and the centrifugal force provided by the arc-shaped filter screen 7, along with the increase of the push length of the push block 28, the push block 28 pushes the film fragments to the cutting knife 4, and the; on the other hand, fourth spring 21 is after pushing out ejector pad 28, because the damping of fourth spring 21 vibrates, on the one hand, can drive ejector pad 28 constantly along recess 20 reciprocating sliding to play the clastic effect of promotion film, on the other hand, the vibrations that the damping was vibrated and is produced are passed through fourth spring 21 and are transmitted for arc filter screen 7 and also further improve arc filter screen 7's vibration frequency and vibrations duration.

When arc filter screen 7 is constantly swung from side to side (clockwise and anticlockwise rotation in turn), bold film piece can be under arc filter screen 7's swing, and is drawn into cutting knife 4 in and cuts once more, and the back is taken away to bold film piece simultaneously, and the probability that arch filter screen 7 mesh was blockked up to bold film piece reduces, is favorable to tiny film piece's screening whereabouts.

In-process at arc filter screen 7 horizontal hunting, arc filter screen 7 constantly shakes, make accumulational film piece loose by shaking, tiny film piece is along with vibrations relative bold film downstream, be favorable to tiny film piece and the clastic quick separation of bold film, and make tiny film piece quick mesh through arc filter screen 7, fall to in collecting chute 23, the tiny film piece that falls to collecting chute 23 is taken out fast by centrifugal air exhauster 2 and is carried out direct utilization to thin wall pipe apparatus for producing 26, thereby make thin wall pipe waste material 27 recycle's cycle short and efficient.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. Thin wall pipe waste recovery device, including rubbing crusher and fan, be equipped with cutting knife and filter screen, its characterized in that in the rubbing crusher: the crusher shell is rotatably connected with a swing rod, the swing rod is positioned above the filter screen, one end of the swing rod abuts against the end part of the filter screen, a knocking hammer is connected onto the swing rod and fixedly connected with the swing rod through a first elastic piece, a plurality of protrusions which are distributed irregularly are arranged on the surface of the knocking hammer, and the knocking hammer can collide with the filter screen after rotating along with the swing rod; the filter screen is provided with a plurality of grooves, the grooves are internally and slidably connected with push blocks, and fourth elastic pieces are fixedly connected between the push blocks and the bottoms of the grooves;

a second elastic piece is connected between the end part of the filter screen and the shell of the pulverizer, a third elastic piece is fixedly connected in the shell of the pulverizer, and the end part of the third elastic piece is fixedly connected with a top column which can be abutted against the filter screen and the stretched second elastic piece;

still including pivoted cutting axle in the rubbing crusher, the swing unit is including rotating the pivot of connection on the rubbing crusher shell, pivot and filter screen fixed connection, fixedly connected with gear in the pivot, cutting knife fixed connection is epaxial at the cutting of rubbing crusher, the epaxial fixedly connected with sector gear of cutting, gear and sector gear meshing.

2. A thin walled tube scrap recycling apparatus according to claim 1, wherein: the filter screen is the arc, be equipped with the baffle along the axis symmetry of filter screen in rubbing crusher's the casing, the outer convex surface of arc of filter screen pastes with the baffle mutually.

3. A thin walled tube scrap recycling apparatus according to claim 1, wherein: the pulverizer is a double-shaft pulverizer.

4. A thin walled tube scrap recycling apparatus according to claim 1, wherein: the fan is a centrifugal exhaust fan, a material collecting groove is arranged in a shell of the pulverizer and located below the filter screen, the centrifugal exhaust fan comprises a negative pressure exhaust pipeline and a discharge pipeline, the negative pressure exhaust pipeline is communicated with the material collecting groove, and the discharge pipeline is connected with a thin-walled tube production device.