CN109774034A - A kind of production technology of POF heat shrink films cooling device and POF heat shrink films - Google Patents
A kind of production technology of POF heat shrink films cooling device and POF heat shrink films Download PDFInfo
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- CN109774034A CN109774034A CN201910149963.0A CN201910149963A CN109774034A CN 109774034 A CN109774034 A CN 109774034A CN 201910149963 A CN201910149963 A CN 201910149963A CN 109774034 A CN109774034 A CN 109774034A
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- 238000000034 method Methods 0.000 claims description 26
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- 238000013461 design Methods 0.000 claims description 9
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Abstract
The invention discloses a kind of multi-layer co-extruded Polyolefin Heat Shrinkable Film cooling device and its production technology, cooling device includes rack and rack-mounted three or more cooling air ring, which vertically sequentially arranges；The cooling air ring of top side is liftably mounted on the rack；The air outlet of the cooling air ring of the top side is in tilted layout upward, and the lifting device for driving the cooling air ring of the top side to go up and down is equipped in rack.The stability of film bubble can effectively be enhanced using the cooling device, reduce the thickness deviation and natural shrinking rate of film, in conjunction with multi-layer co-extruded Polyolefin Heat Shrinkable Film prepared by the production technology that the device carries out, there is higher transparency, glossiness and mechanical property and percent thermal shrinkage.
Description
Technical field
The present invention relates to the technical fields of cooling device in film production, and in particular to a kind of POF heat shrink films cooling
The production technology of device and the POF heat shrink films.
Background technique
Multi-layer co-extruded Polyolefin Heat Shrinkable Film (i.e. POF heat shrink films) gradually replaces PVC to be heat-shrinked in the world
Film becomes market demand and increases most fast, most widely used a kind of heat shrink films.Compared to PVC, PE, PVDC etc., other heat are received
Contracting film, POF film density is small, and quality is smooth, and transparency and glossiness are good, and percent thermal shrinkage is high (being greater than 50%), while having excellent
Tear resistance and heat sealability and outstanding antistatic and cold resistance, it is environment-protecting and non-poisonous, thus be widely used in food, day
The fields such as change, medicine, electronics, toy and building materials, it is deep by producer and consumers.
POF heat shrink films are usually main former with ternary polymerized polypropylene (PP), linear low density polyethylene (LLDPE) (LLDPE)
Material is process through special process such as multi-layer co-extruded, membrane tube molding, bubble blown and cooling and shapings.Wherein, cooling and shaping work
Skill to the comprehensive performances of the POF heat shrink films finally prepared, as dimensional stability, texture, gloss, transparency, percent thermal shrinkage and
Mechanical property etc. has particularly important influence.
Vane quenching is a kind of common mode in the cooling and shaping technique of blown film, is carried out by the film bubble to inflation
Cooling and shaping, the construction and cooling technique of vane have important influence to the quality and production efficiency of blown film products, and
And there is larger difference because of the type of film difference.
A kind of cooling air ring is disclosed in the Chinese patent literature that Authorization Notice No. is 204844842 U of CN, the cooling wind
Ring has cricoid overall structure and the cricoid mouth mold concentric arrangement with inflation film manufacturing machine, which includes suitable axially along
At least one air duct of secondary arrangement, at least one air duct is towards the film bubble opening of the discharge port inflation from the mouth mold, extremely
In a few air duct, the opening near the lower air duct of discharge port is located above the discharge port, and the opening of lower air duct is relative to water
Square to tilting upwards, distance of the lower air duct at the radially center away from discharge port of cooling air ring is greater than or equal to lower air duct
Lower surface in the axial direction of cooling air ring away from the height of discharge port.Although disclosed in the patent document and cooling air ring,
But it is applied to the cooling of membrane tube moulding process, rather than cooling and shaping is carried out to the film bubble of inflation.
The manufacture that a kind of POF heat shrink films are disclosed in the Chinese patent literature that Authorization Notice No. is 2494754 Y of CN is set
It is standby, it include charge melting device, transmission device, drying chamber wind room combination unit, blowfilm shaping device and material collecting device.The wind room
Device is the wind wheel for having vented cavity in the installation of the lower section of drying chamber, and is equipped with micropore in the circumferential inner wall of wind wheel.Its wind room device
Four wind wheels of middle use are fixedly mounted on the lower section of drying chamber.
The cooling device is to the bubble stability after inflation, especially bubble position (the film bubble position that inflation mouth is in shoulder shape)
Control usually relies on extrusion parameter and wind wheel air quantity and wind pressure size to adjust, and position is steeped in actual production and is easy to produce trembling up and down
Or be swung left and right, film bubble stablizing effect is undesirable, easily causes film thickness and width is inhomogenous and scratch and the problems such as tearing.
Summary of the invention
Present invention defect in view of the prior art, provide a kind of multi-layer co-extruded Polyolefin Heat Shrinkable Film cooling device with
And the production technology of the multi-layer co-extruded Polyolefin Heat Shrinkable Film, the device can effectively enhance the stability of film bubble, reduce the thickness of film
Deviation and natural shrinking rate are spent, in conjunction with multi-layer co-extruded Polyolefin Heat Shrinkable Film prepared by the production technology that the device carries out, is had
Higher transparency, glossiness and mechanical property and percent thermal shrinkage.
Specific technical solution is as follows:
A kind of multi-layer co-extruded Polyolefin Heat Shrinkable Film cooling device, including rack and be mounted on the rack three
The above cooling air ring, the cooling air ring are vertically sequentially arranged；
The cooling air ring of top side is liftably mounted on the rack；The air outlet of the cooling air ring of the top side
It is in tilted layout upward；
Lifting device for driving the cooling air ring of the top side to go up and down is installed in the rack.
Since the film bubble plasticity close to inflation mouth is larger, the position of the cooling air ring of the top side and outlet air situation are to film bubble
Stability have larger impact.It can be according to the formula of POF film in actual production and cold using cooling air ring movable up and down
But the position of vane is adjusted flexibly in the variation of technique and the variation of die head extrusion output, and effective stable bubble simultaneously improves cooling effect
Fruit.Air outlet is in tilted layout upward to further increase cooling air ring pair using the distinguished and admirable force component in horizontal and vertical direction
Steep the control of position and the stabilization of film bubble.
Screw rod Motorized lift device specifically may be selected in the lifting device.It, can be according to film bubble by the lifting device
The condition of production controls the cooling air ring upstream or downstream of top side, cooperates fan delivery and wind pressure preferably stable bubble.
The cooling air ring includes commutation wind chamber, and with the air outlet that is connected to of commutation wind chamber, and with the commutation wind
Several air inlets of chamber connection.
Several described air inlets are located at the outside of cooling air ring, and uniformly distributed around the central axis of the cooling air ring.It is logical
Crossing several air inlets can realize that multitube is tangentially entered the wind, and according to the specific condition of production, the quantity of the air inlet is typically designed
It is 3~30, preferably 8~15.
Several described air inlets pass through air hose and connect with blower, and junction is connected using sebific duct, it is ensured that leakproofness.
The air outlet is the crack shape by being formed between upper clamp plate and lower clamp plate, and the upper clamp plate is parallel with the lower clamp plate
Arrangement, is both secured to the inner wall of the cooling air ring.Air outlet was not only simple using the design of crack shape, but also can efficiently use air-flow
Play the role of stable bubble by the Venturi effect that gap generates.Preferably, the lower part of the lower clamp plate and the cooling
The ribs of triangle is fixed between the inner wall of vane；The ribs is uniformly distributed along the circumferential direction of cooling air ring, is reinforced by adding
Rib plays mechanics fixed function, can effectively prevent because air port deformation causes air-flow shakiness, outlet air uneven when wind pressure is larger.Into
One step is preferred, by further fixing along the uniformly distributed screw of cyclic annular crack between the upper clamp plate and lower clamp plate, to guarantee air outlet
The gap of crack is in suitable range.
Preferably, the ratio of the internal diameter and outer diameter of the cooling air ring is 1/3~9/10, further preferably 1/2~4/
5。
The thickness of the cooling air ring and the ratio of crack shape outlet aperture thickness are 10~80:1, further preferably
20~50:1.
Preferably, the commutation wind chamber is to be surrounded radially to prolong with top plate and bottom plate by the ring baffle of upper and lower interlaced arrangement
Stretch the S type channel design of arrangement.The ring baffle is at least two pieces, and by that will commutate, wind chamber is designed to radially extend arrangement
S type channel design can constantly weaken the tangential force of air inlet, enhance radial force, and guarantee that outlet air is uniform.
The cooling air ring used in the present invention can be named as the first cooling wind successively from the bottom to top vertically at least three
Ring, the second cooling air ring ..., N cooling air ring.
Wherein, the cooling air ring (N cooling air ring) of top side, is liftably mounted on the rack, and keeps
Air outlet is in tilted layout upward.Preferably, the angle of the air outlet and horizontal plane of the cooling air ring of top side is in 3~45 °, into one
Preferably 3~15 ° of step.
The present apparatus, which is removed, has spy to the fixed form of cooling air ring and the structure of air outlet of the top side of close inflation mouth
Different design is outer, in addition to this first cooling air ring ..., (N-1) cooling air ring have no particular/special requirement, can use
It is directly anchored in rack, can also use and liftably be mounted on the rack；For easy to process, the first cooling wind
Ring ..., the air outlet of (N-1) cooling air ring preferably arranges in the horizontal direction.
Preferably, the distance proportion between the outer diameter of the cooling air ring and two neighboring cooling air ring is 0.2~10:1, into
One step is preferably 1~5:1.
The cooling air ring is fabricated using materials such as cast iron, cast aluminium or stainless steels, specific material and size
It is adjusted flexibly according to needs of production.
The cooling device is vertically also sequentially disposed with multiple cuticula bubble roll assemblies, and the cuticula bubble roll assembly includes
Multiple cuticula of the more arranged tangentials along same basic circle steep roller.
The cuticula bubble roller includes vertical fixing axle, transverse support bar and set roller.The cuticula bubble roller is by vertically fixing
Axis is mounted on the rack, and the fixed end cap of transverse support bar, and can vertically fixing axle in the vertical fixing axle
It circumferentially rotates, to adapt to the film bubble of production different-diameter.The set roller is rotatably mounted around outside the transverse support bar.
The cuticula bubble roller is selected from ceramics or metal material, carries out preliminarily stabilised to the film bubble after inflation, with cooling air ring
Venturi effect combine common cuticula foam stabilizing.
Preferably, a cuticula bubble roll assembly is at least disposed between two neighboring cooling air ring, to guarantee foam stabilizing effect,
Ensure that thickness of the film bubble on direction of travel is uniform.
Preferably, in each cuticula bubble roll assembly, the multiple cuticula bubble collars is around the circumferential equal of the basic circle
Cloth.Uniformly distributed multiple cuticula bubble roller can be uniform along the entire circumferential thickness for guaranteeing film bubble.
The invention also discloses a kind of production technologies of multi-layer co-extruded Polyolefin Heat Shrinkable Film, including multi-layer co-extruded, film
Pipe molding, bubble blown and cooling and shaping technique, the cooling and shaping technique use above-mentioned cooling device, specifically include:
(1) film bubble after inflation from top to bottom passes through the cooling air ring of the top side and top side through traction device
Cuticula steeps roll assembly, and the cuticula bubble roll assembly through the top side carries out preliminary foam stabilizing to the film bubble, prevents film bubble from shaking；Again
The upper and lower position of the cooling air ring of the top side is adjusted by the lifting device, and utilizes the cooling wind from the top side
The cooling medium of the air outlet blowout of ring tilted upward adjust the bubble position of the film bubble between inflation mouth at a distance to keep film
The stabilization of bubble, while realizing the preliminary cooling to the film bubble；
(2) continue to draw the film bubble in order by other cooling air rings and other cuticula bubble roll assembly, by described
Other cuticula bubble roll assemblies guarantee that the film bubble keeps the uniform of thickness in distraction procedure；Pass through other cooling air ring air quantity
The adjusting of size keeps the bubble position stable and realizes to after being fully cooled of the film bubble, is further continued for subsequent technique.
Other cooling air rings are the cooling air ring in addition to the cooling air ring of top side；Other cuticula bubble rollers remove
Cuticula outside the cuticula bubble roll assembly of top side steeps roll assembly.
The subsequent technique includes the technique for eliminating film internal stress through hot-rolling and chilling roller processing.
In step (1), the bubble position of the film bubble between inflation mouth at a distance from according to the formulas of POF heat shrink films to be prepared
And width can be varied；" stabilization of film bubble " specifically refers to film bubble and neither trembles nor be swung left and right up and down.
During the cooling and shaping, each road cooling air ring air quantity controls independently of each other, and fan delivery uses frequency control
Control can adapt to the needs of production technology by changing the revolving speed change fan delivery of blower, energy-efficient, improve production
The practicability and controllability of operation.
Preferably, the cooling medium that the cooling air ring of the top side and other cooling air rings use is selected from natural wind
And cooling wind；Some is using natural wind as cooling medium in i.e. all cooling air rings, and some is using cooling wind as cooling
Medium.It is found through experiment that all use natural wind cooling compared to all cooling air rings, or all using cooling down air cooling,
The POF film that the preferred type of cooling is finally prepared has more preferably light transmittance, glossiness and percent thermal shrinkage, is provided simultaneously with higher
Tensile strength.
Preferably, the temperature of the cooling wind is 5~15 DEG C.
Preferably, the cooling and shaping process is formed with the biaxial tension of film bubble, lateral multiple and longitudinal stretching multiple
It is independently selected from 4~7 times.
Compared with prior art, the present invention has the advantage that
1, cooling device disclosed by the invention has production flexibility ratio high, and assembling is easy to maintenance, is suitble to large-scale production
Feature；
2, cooling device outlet air disclosed by the invention is sufficient, uniform, can obtain the ideal air quantity and wind of POF film requirement
Pressure；
3, it realizes segmented using the production technology that above-mentioned specific cooling device carries out gradually to cool down, effectively control is poly-
The thermal behavior of olefin material temperature-fall period reduces film surface wrinkling, and reaches the horizontal and vertical tensile property of POF film
Ideal numerical value, while improving production efficiency；It is crucial that can guarantee bubble stability, the thickness of film is effectively controlled
Degree and precision reduce natural shrinking rate, improve texture (smoothness), glossiness and the transparency of film, guarantee that the POF of preparation has
Excellent percent thermal shrinkage and mechanical property.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the multi-layer co-extruded Polyolefin Heat Shrinkable Film cooling device of the present invention；
Fig. 2 is the structural schematic diagram of cooling air ring；
Fig. 3 is the transverse sectional view of the first cooling air ring；
Fig. 4 is B partial enlarged view in Fig. 3；
Fig. 5 is corner cross-sectional view of first cooling air ring along A-A direction shown in Fig. 3；
Fig. 6 is C partial enlarged view in Fig. 5；
Fig. 7 is the axial sectional view of the 4th cooling air ring；
Fig. 8 is the top view that single group cuticula steeps roll assembly；
In figure: 1- film bubble, 2- rack, 3- cuticula bubble roller, the first cooling air ring of 4-, the second cooling air ring of 5-, 6- third are cold
But vane, the 4th cooling air ring of 7-, the big baker of 8-, 9- blower, 10- air hose；
201- upper plate, 202- lower plate, 203- support column, 204- horizontal mounting plate；
The vertical fixing axle of 301-, 302- transverse support bar, 303- cover roller, 304- primitive；
The first air inlet of 401-, the first top plate of 402-, the first bottom plate of 403-, the lower ring baffle of 404- first, 405- first
Upper ring baffle, the first air outlet of 406-, the first upper clamp plate of 407-, the first lower clamp plate of 408-, 409- screw, 410- ribs,
411- outer wall, 412- inner wall；
The 4th air inlet of 701-, the 4th top plate of 702-, the 4th bottom plate of 703-, the lower ring baffle of 704- the 4th, 705- the 4th
Upper ring baffle, the 4th air outlet of 706-, the 4th upper clamp plate of 707-, the 4th lower clamp plate of 708-.
Specific embodiment
With reference to the accompanying drawing and specific embodiment to multi-layer co-extruded Polyolefin Heat Shrinkable Film cooling device of the invention into
Row is described in detail.
Referring to attached drawing 1~8, cooling device of the invention include rack 2, four cooling air rings being mounted in rack 2 with
And it is mounted on three cuticula bubble roll assembly in rack 2.Aforementioned four cooling air ring is vertically sequentially arranged from the bottom to top, respectively
It is denoted as the first cooling air ring 4, the second cooling air ring 5, third cooling wind 6 and the 4th cooling air ring 7.Two neighboring cooling air ring it
Between be respectively provided with cuticula bubble roll assembly.
Rack 2 is made of upper plate 201, lower plate 202, several support columns 203 and several horizontal mounting plates 204.
First cooling air ring 4 is annular in shape, and the ratio of outer annular diameter D1 and annular diameters d1 are 5:3.It includes commutation wind chamber,
The first air outlet 406 being connected to the commutation wind chamber, and ten the first air inlets 401 being connected to the commutation wind chamber.This first
Cooling air ring 4 is directly fixed in rack.
First air inlet 401 is located at the outside of the outer wall 411 of the first cooling air ring 4, and around the first cooling air ring 4
Central axis is uniformly distributed.Each air inlet is connect by air hose 10 with blower 9, and junction is connected using sebific duct, it is ensured that leakproofness.
The commutation wind chamber is the first lower ring by the first top plate 402, the first bottom plate 403, and with the fixation of the first bottom plate 403
The S type channel design that ring baffle 405 surrounds on shape baffle 404 and fixed with the first top plate 402 first, S type channel knot
Structure radially extends arrangement, can constantly weaken the tangential force of air inlet, constantly enhancing radial force, and guarantees that outlet air is uniform.
First air outlet 406 is the crack shape being made of the first upper clamp plate 407 and the first lower clamp plate 408, upper and lower plywoods
It is both secured to the inner wall 412 of the first cooling air ring 4, is arranged in parallel in the horizontal direction.
The ratio of the 406 gap thickness of the first air outlet of the thickness and crack shape of first cooling air ring 4 is 20:1.First
The ribs 410 of several triangles is fixed between the lower part of lower clamp plate 408 and the inner wall 412 of the first cooling air ring 4 (in figure only
A ribs is drawn, remaining omission)；The ribs 410 is uniformly distributed along the circumferential direction of cooling air ring, is risen by adding ribs 410
To mechanics fixed function, can effectively prevent because air port deformation causes air-flow shakiness, outlet air uneven when wind pressure is larger.This first
By being further fixed along the uniformly distributed screw 409 of crack shape air outlet between upper clamp plate 407 and the first lower clamp plate 408, to guarantee
The gap of air port crack immobilizes.
Second cooling air ring 5 and third cooling wind 6 have and the identical structure of the first cooling air ring 4 and fixation side
Formula.
4th cooling air ring 7 is located at the top, close to the inflation mouth of film bubble.4th cooling air ring 7 is electronic by screw rod
Lifting device is liftably mounted in rack 2.
Four cooling air ring 7 and the first cooling air ring 4 have basically same structure, are still including the wind that commutates in structure
Chamber, the 4th air outlet 706 being connected to the commutation wind chamber, and ten the 4th air inlets 701 being connected to the commutation wind chamber.Commutation
Wind chamber is by the 4th top plate 702, the 4th bottom plate 703, and the fourth lower ring baffle 704 fixed with the 4th bottom plate 703 and with the
The S type channel design that ring baffle 705 surrounds on the 4th of four top plates 702 fixation.
Difference is in the design of air outlet that the 4th air outlet 706 is by the 4th upper clamp plate 707 and the 4th lower clamp plate
The crack shape of 708 compositions, upper and lower plywoods parallel arrangement, but horizontal by 15 ° of angles.The arrangement at inclination angle may make wind
Ring participates in the control of bubble position more flexiblely, and the force component using air-flow in horizontal and vertical direction further increases vane
Foam stabilizing effect.
Above four cooling air rings are all made of identical size, and outer diameter D 1 and the distance proportion in adjacent cooling air ring gap are
3.5:1.
Cuticula bubble roll assembly shares three groups, vertically, sequentially arranges, every group of cuticula bubble roll assembly includes along same basic circle
8 cuticula of 304 arranged tangential steep roller 3.8 cuticula bubble rollers 3 are uniformly distributed around the circumferential direction of basic circle 304.
Every cuticula bubble roller 3 includes vertical fixing axle 301, transverse support bar 302 and set roller 303.Cuticula steeps roller 3 by erecting
It is mounted in rack 2 to fixing axle 301, the fixed end cap of transverse support bar 302 is mounted in vertical fixing axle 301, and can be along perpendicular
It is circumferentially rotated to fixing axle 301, to adapt to the film bubble of production different-diameter.Set roller 303 is rotatably mounted around cross-brace
Outside bar 302.
The course of work is as follows:
Film bubble 1 via big baker 8 the preheating of each area, be heated to enter in cooling device of the invention after certain temperature, by
The system that froths inflation carries out the preliminary sizing of film bubble 1.
The air-flow of each cooling air ring system is delivered to the air inlet of each cooling air ring from blower 9 via air hose 10,
Air-flow is entered the wind along the tangent to periphery of cooling air ring, is flowed through and is radially prolonged by what top plate and bottom plate and upper and lower ring baffle surrounded
After the S type channel design for stretching arrangement, constantly weaken the tangential force of air inlet, enhances radial force, to guarantee the uniform of outlet air.
The position of each group cuticula bubble roll assembly is adjusted, so that each cuticula bubble roller in every group of cuticula bubble roll assembly is along institute
The preliminary foam stabilizing of film bubble progress that film bubble periphery is evenly distributed, to passing through is stated, the large-amplitude sloshing of film bubble is prevented.Then bubble position is carried out
The height of the adjusting of (a-a dotted line position is to steep position in Fig. 1), control inflation mouth distance bubble position ensures to steep between optimum range
Position is neither trembleed nor is swung left and right up and down, specifically adjusts the 4th cooling air ring 7 using screw rod Motorized lift device and carries out
Lower movement, and the air force of the 4th vane of auxiliary adjustment, to adapt to formula, cooling technique and the die head extrusion output of POF film
Variation, reach effective stable bubble and improve cooling effect；The air outlet 706 of 4th cooling air ring 7 is in tilted layout upward can
Vane is further increased to the control of bubble position and the stabilization of film bubble using the distinguished and admirable force component in horizontal and vertical direction.Together
When, the air force of auxiliary adjustment baker each area's temperature and the first, second, third vane makes to steep position stabilization and makes the saturating of film
Lightness and intensity reach ideal value.Subsequent process flow is subsequently entered through sufficient film bubble after cooling.
Embodiment 1
Using above-mentioned cooling device, five-layer co-squeezing is carried out with the formula of commercially available saliva prestige film and goes out to prepare 19 micron thickness, 3.2
The wide POF film of rice, membrane tube goes out through five-layer co-squeezing, preheat (250~300 DEG C), heat (280~360 DEG C), be blown into bubble (200~
100), film bubble is drawn from top to bottom passes sequentially through spaced apart four cooling air ring and three cuticula bubble roll assembly, cuticula bubble
Roller is evenly distributed along film bubble periphery, carries out preliminary foam stabilizing to the film bubble passed through, prevents the large-amplitude sloshing of film bubble, electronic by screw rod
Lifting device adjusts the upper and lower position of the 4th cooling air ring, utilizes tilting upward of blowing out from the air outlet of the 4th cooling air ring
Cooling medium is by the distance controlling between the bubble position of film bubble and inflation mouth in 20~30cm.
Continue traction film bubble and passes through third cooling air ring, the second cooling air ring and the first cooling air ring, Yi Jifen in order
Cuticula bubble roll assembly and the second cooling air ring and the first cooling air ring not between third cooling air ring and the second cooling air ring
Between cuticula steep roll assembly.Roll assembly, which is steeped, by other cuticula guarantees that film bubble keeps the uniform of thickness in distraction procedure；Pass through it
The adjusting of its cooling air ring air force, it is stable and realize to after being fully cooled of film bubble to make to steep position, is further continued for subsequent technique.
Cooling procedure is formed with the biaxial tension of film bubble, and cross directional stretch and longitudinal stretching multiplying power are respectively 6 times and 5.6
Times.The fan delivery of cooling procedure uses variable frequency regulating speed control, wherein the 4th cooling air ring, third cooling air ring are cooling with second
Vane is cooling using natural wind, and the first cooling air ring is cooled down using cooling wind.Subsequent product is cold through 65 DEG C of hot-rollings and 20 DEG C
Film internal stress is eliminated in roller processing, POF film is prepared, the performance parameter of POF film manufactured in the present embodiment is listed in the table below in 1.
Comparative example 1
Using device in the same manner as in Example 1, identical technique, difference is only that, four cooling air rings are all made of cold
But air cooling.
The POF film properties parameter of this comparative example preparation is listed in the table below in 1.
Comparative example 2
Using device in the same manner as in Example 1, identical technique, difference is only that, four cooling air rings are all made of certainly
Right air cooling.
The POF film properties parameter of this comparative example preparation is listed in the table below in 1.
Table 1
Above embodiments are expounded equipment construction of the invention and embodiment, it is intended to which help understands present invention side
Method and key point.The contents of this specification are not to be construed as limiting the invention, and those of ordinary skill in the art are not making
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of creative work.
Claims (10)
1. a kind of POF heat shrink films cooling device, including rack and three or more cooling air rings being mounted on the rack,
The cooling air ring is vertically sequentially arranged；
It is characterized by:
The cooling air ring of top side is liftably mounted on the rack；The air outlet of the cooling air ring of the top side is upward
It is in tilted layout；
Lifting device for driving the cooling air ring of the top side to go up and down is installed in the rack.
2. POF heat shrink films cooling device according to claim 1, it is characterised in that:
The cooling air ring includes commutation wind chamber, and the air outlet being connected to the commutation wind chamber, and is connected with the commutation wind chamber
Several logical air inlets.
3. POF heat shrink films cooling device according to claim 2, it is characterised in that:
The commutation wind chamber is that the S type for radially extending arrangement is surrounded by the ring baffle and top plate and bottom plate of upper and lower interlaced arrangement
Channel design.
4. POF heat shrink films cooling device according to claim 2, it is characterised in that:
The air outlet is the crack shape by being formed between upper clamp plate and lower clamp plate, upper clamp plate cloth parallel with the lower clamp plate
It sets, is both secured to the inner wall of the cooling air ring.
5. POF heat shrink films cooling device according to claim 2, it is characterised in that:
The outside of cooling air ring where several described air inlets are located at it, the central axis around cooling air ring where it are equal
Cloth.
6. POF heat shrink films cooling device according to claim 1, it is characterised in that:
Vertically, multiple cuticula bubble roll assemblies are sequentially disposed with, the cuticula bubble roll assembly includes more cutting along same basic circle
Roller is steeped to multiple cuticula of arrangement；
The cuticula bubble roller includes vertical fixing axle, transverse support bar and set roller；
The vertical fixing axle is mounted on the rack；
The fixing end of the transverse support bar is rotatably mounted around in the vertical fixing axle；
The set roller is rotatably mounted around outside the transverse support bar.
7. POF heat shrink films cooling device according to claim 6, it is characterised in that:
A cuticula bubble roll assembly is at least disposed between two neighboring cooling air ring；
In each cuticula bubble roll assembly, the multiple cuticula bubble collars is uniformly distributed around the circumferential direction of the basic circle.
8. POF heat shrink films cooling device according to claim 1, it is characterised in that:
Cooling air ring on the downside of the cooling air ring of the top side is fixed in the rack；
The air outlet of cooling air ring on the downside of the cooling air ring of the top side is arranged in the horizontal direction.
9. a kind of production technology of POF heat shrink films, including multi-layer co-extruded, membrane tube molding, bubble blown and cooling and shaping work
Skill, which is characterized in that the cooling and shaping technique is specifically included using the cooling device as described in claim 1~8 is any:
(1) film bubble after inflation from top to bottom passes through the cooling air ring of the top side and the cuticula of top side through traction device
Roll assembly is steeped, the cuticula bubble roll assembly through the top side carries out preliminary foam stabilizing to the film bubble, prevents film bubble from shaking；Pass through again
The lifting device adjusts the upper and lower position of the cooling air ring of the top side, and utilizes the cooling air ring from the top side
The cooling medium of air outlet blowout tilted upward adjust the bubble position of the film bubble between inflation mouth at a distance to keep film bubble
Stablize, while realizing the preliminary cooling to the film bubble；
(2) continue to draw the film bubble in order by other cooling air rings and other cuticula bubble roll assembly, by described other
Cuticula bubble roll assembly guarantees that the film bubble keeps the uniform of thickness in distraction procedure；Pass through other cooling air ring air forces
Adjusting, keep the bubble position stable and realize to after being fully cooled of the film bubble, be further continued for subsequent technique.
10. the production technology of POF heat shrink films according to claim 9, which is characterized in that described most upper in step (1)
The cooling medium that the cooling air ring of side and other cooling air rings use is selected from natural wind and cooling wind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910149963.0A CN109774034B (en) | 2019-02-28 | Cooling device for POF heat-shrinkable film and production process of POF heat-shrinkable film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910149963.0A CN109774034B (en) | 2019-02-28 | Cooling device for POF heat-shrinkable film and production process of POF heat-shrinkable film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109774034A true CN109774034A (en) | 2019-05-21 |
| CN109774034B CN109774034B (en) | 2024-07-02 |
Family
ID=
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112829139A (en) * | 2020-12-31 | 2021-05-25 | 上海邦临管道工程技术有限公司 | Openable cooling air ring device |
| CN115056397A (en) * | 2022-07-13 | 2022-09-16 | 河间市精诚塑业有限公司 | Film blowing machine |
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| CN108790135A (en) * | 2018-04-10 | 2018-11-13 | 佛山市顺德区捷勒塑料设备有限公司 | Three lip cooling vanes of inflation film manufacturing machine |
| CN209666044U (en) * | 2019-02-28 | 2019-11-22 | 黄山至德新材料科技有限公司 | A kind of multi-layer co-extruded Polyolefin Heat Shrinkable Film cooling device |
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| DE2031496A1 (en) * | 1970-06-25 | 1971-12-30 | Windmoeller & Hoelscher | Method and device for producing shrink films |
| JPH0691752A (en) * | 1992-09-16 | 1994-04-05 | Mitsubishi Petrochem Co Ltd | Method of forming inflation film |
| JPH0847973A (en) * | 1994-08-04 | 1996-02-20 | Mitsubishi Chem Corp | Production of inflation biaxially oriented resin film |
| JP2003137467A (en) * | 2001-10-30 | 2003-05-14 | Canon Inc | Image forming device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112829139A (en) * | 2020-12-31 | 2021-05-25 | 上海邦临管道工程技术有限公司 | Openable cooling air ring device |
| CN115056397A (en) * | 2022-07-13 | 2022-09-16 | 河间市精诚塑业有限公司 | Film blowing machine |
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