CN109605720A - Plastic film blowing machine inner-cooling structure - Google Patents
Plastic film blowing machine inner-cooling structure Download PDFInfo
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- CN109605720A CN109605720A CN201810363480.6A CN201810363480A CN109605720A CN 109605720 A CN109605720 A CN 109605720A CN 201810363480 A CN201810363480 A CN 201810363480A CN 109605720 A CN109605720 A CN 109605720A
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- air
- ring shape
- circular ring
- film
- air hose
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
- B29C2035/1658—Cooling using gas
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
A kind of plastic film blowing machine inner-cooling structure, including columned film-blowing die head, vertical interior air hose and vertical outer air hose, the external annulus of circular ring shape is additionally provided with above film-blowing die head, circular ring shape external annulus offers multiple outlet apertures, circular top cover board is connected at the top of circular ring shape external annulus, the internal ring wall of circular ring shape is additionally provided with inside circular ring shape external annulus, ring wall offers multiple small ventilating holes, the top cover of internal layer annular wind chamber is equipped with circular ring shape partition, the circular ring shape partition is also provided with multiple vents, each vent has been correspondingly connected with an air-exhausting duct, the extending direction and horizontal plane of each section of air-exhausting duct upper section form oblique；Circular ring shape wainscot is additionally provided with above the circular top cover board.The present invention can improve film bubble cooling effect.
Description
Technical field
The invention belongs to the technical fields of plastic film blowing machine, and in particular to a kind of plastic film blowing machine inner-cooling structure.
Background technique
Plastic film can be produced using blowing.In process of production, circle of the plastics melt from film-blowing die head 10
Annular extrusion 101 squeezes out upwards and forms film bubble, as shown in Figure 1, film bubble 8 is constantly moved upwards by traction, and is located at film bubble 8
The cooling body on side then constantly blows out cooling air, plays cooling effect to film bubble 8, condenses film bubble 8.The type of cooling point
For external cooling method and interior cold mode, external cooling method uses outer cold wind ring 102, and outer cold wind ring 102 is located on the outside of film bubble 8, blow out to
The cooling air-flow in heart direction is cooled down outside film bubble 8；Interior cold mode is then subdivided into interior cold wind ring and the ring with outlet aperture
Two kinds of forms of shape wall, interior cold wind ring and annular wall are both located on the inside of film bubble, from the cold of round wind outlet blowout centrifugal direction
But air-flow is cooled down from film bubble the inside.Wherein interior cold wind is equipped with the gas outlet of a circular ring shape.
And the existing annular wall using outlet aperture then structure as shown in Figure 1, including columned film-blowing die head 10, vertical
Interior air hose 1 and vertical outer air hose 2, hair dryer and exhaust fan, interior air hose 1 and outer air hose 2 are equipped with outside film-blowing die head 10
Tube wall it is airtight, interior air hose 1 and outer air hose 2 are passed down through the central location of film-blowing die head 10, interior air hose 1 and outer air hose 2
Central axis it is Chong Die with the axial centerline of film-blowing die head 10, interior air hose 1 and outer air hose 2 shape on floor projection position
Concentric round relationship, 2 sets of outer air hose extend up to blown film from 10 central location of film-blowing die head in interior 1 outside of air hose, interior air hose 1
10 top of die head；Internal layer annular wind chamber 12 is formed between interior air hose 1 and outer air hose 2；Circle is additionally provided in the periphery of interior 1 upper section of air hose
Annular wall 4(annular wall 4 of annular is located at the periphery of interior 1 upper section of air hose, therefore referred to as external annulus 4)；The central axis of external annulus 4
Also Chong Die with the axial centerline of film-blowing die head 10, external annulus 4 intensively offers multiple outlet apertures 41, and outlet aperture 41 exists
External annulus 4 and it is vertical on circumferential formed be uniformly distributed, the bottom of external annulus 4 is along close to 10 upper surface of film-blowing die head, outside circular ring shape
The top of ring wall 4 is connected with circular top cover board 7, and the diameter of circular top cover board 7 is equal with the diameter of circular ring shape external annulus 4；It is described
Interior air hose 1 is upward through circular top cover board 7；Be formed as upper annular wind chamber 32, internal layer between circular ring shape external annulus 4 and interior air hose 1
The top of annular wind chamber 12 is connected to upper annular wind chamber 32.When work, circular ring shape extrusion 101 of the film bubble 8 from film-blowing die head 10
It squeezes out, and runs up, pass through from the periphery of circular ring shape external annulus 4；Hair dryer is connected to the bottom end of internal layer annular wind chamber 12, institute
It states internal layer annular wind chamber 12 and is formed as air intake passage；Exhaust fan is connected to the bottom end of interior air hose lumen 11, the pipe of the interior air hose
Chamber 11 is formed as air-out passage；Cooling air-flow is from 12 uplink of internal layer annular wind chamber, into upper annular wind chamber 32, then from circular ring shape
Multiple outlet apertures 41 of external annulus are blown out, to cool down to 8 inner surface of film bubble；Then, air-flow uplink reaches interior air hose
1 top is inhaled into the lumen 11 of interior air hose, and takes away from the lower end of interior air hose.
The above-mentioned plastic film blowing machine inner-cooling structure using interior cold ring wall, cooling efficiency is still to be improved, specifically has following
Two aspect reasons:
One, when working, the temperature of film-blowing die head is up to 200 degree or so, and air intake passage 12 is directly close to film-blowing die head 10, cooling
Air-flow can significantly heat up when flowing through 10 center of film-blowing die head.Even if heat-barrier material is arranged on air intake passage, but work one
After the section time, the temperature of heat-barrier material will rise towards the temperature in film-blowing die head, thus heat-barrier material can not effectively hinder
The only significantly heating of cooling air-flow；
Two, the interior air hose near top inside film bubble, the air-flow siphoned away can take a shortcut, such as in Fig. 1, air-flow can be along A → B
The path of → C is mobile, without moving along the path A → B → E → C, will not more move along the path A → B → E → G → C,
It means that the air at (position near triangle EFG as shown in figure 1) is generally difficult to be sucked away at the top of film bubble, but it is former for a long time
Envelope fixedly stays at the top of film bubble, close to the dead angle for forming air-flow flowing, causes the air themperature at the position very high, influences cold
But effect, meanwhile, will also result in following this un-reasonable phenomenon: the air being pumped in film bubble is not the highest air of temperature,
The highest air of temperature cannot be siphoned away in time, this also influences whether film bubble cooling effect.
Three, in upper annular wind chamber 32, outlet aperture 41 is followed while rising due to cooling air-flow and is released, cooling air-flow
Pressure vertically with the rising of height, cooling air-flow pressure sharply declines rapid decrease, pressure is not very uneven, specifically
It says, it is more much lower than atmospheric pressure at R point below at the S point of top in Fig. 1.
Summary of the invention
A kind of plastic film blowing machine inner-cooling structure is provided it is an object of the invention to overcome disadvantages mentioned above, it can improve film bubble
Cooling effect.
Its purpose can be realized by following scheme: the plastic film blowing machine inner-cooling structure, including columned film-blowing die head, perpendicular
To interior air hose and vertical outer air hose, hair dryer and exhaust fan, the pipe of interior air hose and outer air hose are equipped with outside film-blowing die head
Wall is airtight, and interior air hose and outer air hose are passed down through the central location of film-blowing die head, the central axis of interior air hose and outer air hose
Chong Die with the axial centerline of film-blowing die head, interior air hose and outer air hose form concentric circles relationship on floor projection position,
Outside interior air hose, interior air hose extends up to above film-blowing die head outer duct sleeve from film-blowing die head central location；In blown film mould
The top of head is additionally provided with the external annulus of circular ring shape, and the bottom of external annulus is along close to film-blowing die head upper surface, the central axis of external annulus
Also Chong Die with the axial centerline of film-blowing die head；Circular ring shape external annulus offers multiple outlet apertures, and outlet aperture is in annulus
The week of shape external annulus, which is upwardly formed, to be uniformly distributed, and the internal diameter of circular ring shape external annulus is greater than the outer diameter of outer air hose；Circular ring shape external annulus
Top be connected with circular top cover board, the diameter of circular top cover board is equal with the diameter of circular ring shape external annulus；It is characterized in that,
The lumen open top of the interior air hose, the interior air hose top are lower than the circular top cover board, have separated one between the two
Duan Shuxiang distance；The outer air hose also extends up to above film-blowing die head from film-blowing die head center, exogenous wind tube top end it is vertical
Position is concordant with the vertical position on interior air hose top；The central part of the circular top cover board is in up big and down small cone shape;?
The internal ring wall of circular ring shape is additionally provided with inside circular ring shape external annulus, the diameter of internal ring wall is greater than outer air hose and is less than circular ring shape outer ring
Wall, the top edge of internal ring wall connect lamina tecti, and the bottom of internal ring wall is along close to the upper surface of film-blowing die head；Internal ring wall offers multiple
Gas aperture, small ventilating holes are upwardly formed in the week of internal ring wall and are uniformly distributed, but small ventilating holes are in the vertical uneven of internal ring wall
Distribution, and then small ventilating holes are more intensive closer to lower end；Be formed as the internal layer annular wind of circular ring shape between interior air hose and outer air hose
Chamber；The middle layer annular wind chamber that circular ring shape is formed between outer air hose and internal ring wall, forms circular ring shape between internal ring wall and external annulus
Outer annular wind chamber；The hair dryer is connected to the bottom end of interior air hose lumen, and the segment dislocation of the interior air hose is that air inlet is logical
Road；The exhaust fan is connected to the bottom end of internal layer annular wind chamber, and the internal layer annular wind chamber is formed as air-out passage；The internal layer
The top cover of annular wind chamber is equipped with circular ring shape partition, and the vertical position of circular ring shape partition is also lower than lamina tecti；Circular ring shape partition
Central circular hole is directed at the upper port of interior air hose；Internal ring wall be located at the vertical positions of the small ventilating holes of the top lower than circular ring shape every
Plate；The circular ring shape partition is also provided with multiple vents, and each vent is uniformly distributed along the circumferential direction of circular ring shape partition, each
Vent has been correspondingly connected with an air-exhausting duct, and each air-exhausting duct is upward through the circular lamina tecti；The air-exhausting duct is divided into
Air-exhausting duct upper section and air-exhausting duct lower section, wherein air-exhausting duct upper section is located above lamina tecti, and air-exhausting duct lower section is located at lamina tecti and circle
Between annular partition；Air inlet gap is formed between air-exhausting duct lower section per adjacent two air-exhausting ducts；Each section of air-exhausting duct upper section closes
Rotational symmetry relationship is formed in the central axis of film-blowing die head；The extending direction and horizontal plane of each section of air-exhausting duct upper section are formed tiltedly
It hands over, the distance of air-exhausting duct upper section upper end to film-blowing die head central axis is greater than air-exhausting duct upper section lower end to film-blowing die head central axis
Distance；On horizontal plane, each air-exhausting duct upper section extending direction is formed radially with the air-exhausting duct upper section lower end central point
45 °~90 ° of angle；Circular ring shape wainscot, the central axis of circular ring shape wainscot are additionally provided with above the circular top cover board
Chong Die with the axial centerline of film-blowing die head, the height of circular ring shape wainscot is greater than the height of air-exhausting duct upper section, on circular ring shape
The radius of siding is greater than the eccentric distance of air-exhausting duct upper section upper end.
So-called rotational symmetry relationship refers in several components around film-blowing die head central axis arrangement, if handle
One of component is rotated around film-blowing die head central axis (referred to as symmetry axis or rotary shaft), whenever one angle of rotation
After 360 °/n (n is the positive integer greater than 1), just it is overlapped with the location and shape of other one of component, this relationship is just named
Do rotational symmetry relationship.
So-called air-exhausting duct upper section lower end refers to the boundary position of air-exhausting duct upper section Yu circular lamina tecti, i.e., on air-exhausting duct
The boundary position of section and air-exhausting duct lower section.
The radial direction of so-called air-exhausting duct upper section lower end central point refers to straight by the lamina tecti of air-exhausting duct upper section lower end central point
Diameter direction.
The eccentric distance of so-called air-exhausting duct upper section upper end, refer to air-exhausting duct upper section upper end to film-blowing die head central axis
Horizontal distance.
The eccentric distance of so-called air-exhausting duct upper section lower end, refer to air-exhausting duct upper section lower end to film-blowing die head central axis
Horizontal distance.
The present invention has the following advantages and effects:
When the invention works, cooling air-flow is flowed up from the lumen of interior air hose, above the lumen for reaching interior air hose, is then passed through
Per the air inlet gap between adjacent two air-exhausting duct lower sections, into middle layer annular wind chamber, later, middle layer annular wind chamber it is cold
But air-flow downlink, downlink gradually enters outer annular wind chamber by the small ventilating holes of internal ring wall on the way, finally by outer annular wind
Multiple outlet apertures of chamber are blown out, to cool down to film bubble inner surface；Then, high temperature gas flow uplink reaches the top of film bubble
Portion, and internal layer annular wind chamber is sucked, it flows downward, is finally taken away from the lower end of internal layer annular wind chamber, there are also following for the above process
Advantage:
One, the segment dislocation of interior air hose is air intake passage；And internal layer annular wind chamber is formed as air-out passage, in this way, air intake passage
Just kept apart by internal layer annular wind chamber between film-blowing die head, the temperature of film-blowing die head would not be directly passed to air intake passage
Cooling air-flow, can only be directly passed to the air of air-out passage, but the air of air-out passage can drain at once again, thus air inlet
The temperature of the cooling air-flow in channel is not influenced substantially by film-blowing die head；
Two, each section of air-exhausting duct upper section forms rotational symmetry relationship about the central axis of film-blowing die head, and each air-exhausting duct upper section prolongs
The radial shape for stretching direction and the air-exhausting duct upper section lower end central point is at 45 °~90 ° of angle；In this way, on film bubble top, air-flow quilt
The direction for sucking air-exhausting duct is not just vertical along the radial direction of film-blowing die head or vertical, (suitable with the radial direction of film-blowing die head
In the radial direction of air-exhausting duct upper section lower end central point) shape is at 45 °~90 ° of angle, keep air-flow empty in the inside of circular ring shape wainscot
Between form high-speed rotating eddy effect, in addition when air-flow is adsorbed into the inner space of circular ring shape wainscot, meeting and annulus
The inner ring surface of shape wainscot, the upper surface of circular top cover board form shock, (circular ring shape wainscot, which has, is similar to the Echo Wall for reflection
Effect), enhance air-flow in the eddy effect of the inner space of circular ring shape wainscot, whirlpool central part air pressure is lower, and whirlpool
The position air pressure of whirlpool periphery is higher, and air-exhausting duct upper section upper extreme point is located in whirlpool periphery position, thus is conducive to film bubble top
High temperature gas flow indentation air-exhausting duct in；
Three, above-mentioned eddy effect can also transmitting extends all the way up inside film bubble, make the air of the top inside film bubble also shape
At whirlpool, swirl center forms low pressure, is conducive to the air agitation of the top inside film bubble and is sucked away, in addition circular ring shape upper wall
The presence of plate can limit air-flow and take a shortcut near air-exhausting duct upper end tube nozzle, and pressure declines again after increase upwards first air-flow,
The air of the top inside film bubble is avoided to form the dead angle that will not be flowed, so that the air of the top inside film bubble be avoided to be difficult to take out
It walks and significantly heats up, in short, the present invention can take as early as possible the highest air of film bubble internal temperature away, and avoid air-flow in film
Bubble is internal to be partially formed dead angle and constantly heats up, to be more advantageous to whole cooling effect；
Four, the cooling air-flow downlink of middle layer annular wind chamber, downlink are gradually small by breathing freely for middle layer annular wind chamber in the process
Hole enters outer annular wind chamber, and since then small ventilating holes are more intensive closer to lower end for internal ring wall, is conducive to offset " annular in this way
Closer to flow path downstream, then wind pressure is lower in wind chamber " trend, so that the air pressure of outer annular wind chamber is vertically distributed ratio
It is more uniform, it avoids the problem that " then air pressure is lower closer to lower part " occurs in outer annular wind chamber, is distributed the pressure of cooling air-flow
It is relatively uniform；
Five, the vertical position positioned at the small ventilating holes of the top is lower than circular ring shape partition, pipe of such cooling air-flow from interior air hose
Enter after middle layer annular wind chamber top above chamber by the air inlet gap between air-exhausting duct lower section, will not radially flow at once
Enter outer annular wind chamber, but enter back into outer annular wind chamber after a distance that flows downward, avoids outer annular wind chamber
There is uneven distribution due to being influenced by air-exhausting duct in the circumferential in air pressure.
Detailed description of the invention
Fig. 1 is a kind of cooling structure schematic diagram of conventional plastic inflation film manufacturing machine.
Fig. 2 is the present invention a kind of structural principle and cooling air-flow flow path schematic diagram of specific embodiment.
Fig. 3 is local air flow flow path enlarged diagram in Fig. 2.
Fig. 4 is the partial structurtes enlarged diagram in Fig. 2.
Fig. 5 is K-K the schematic diagram of the section structure in Fig. 4.
Fig. 6 is H-H the schematic diagram of the section structure in Fig. 4.
Fig. 7 is J-J the schematic diagram of the section structure in Fig. 4.
Fig. 8 is partial circumferential expanded view of the outlet aperture on external annulus.
Fig. 9 is partial circumferential expanded view of the small ventilating holes on internal ring wall (close to the part of internal ring wall the top).
Figure 10 is the schematic perspective view of air-exhausting duct upper section and circular ring shape wainscot.
Figure 11 is the schematic top plan view of structure shown in Figure 10.
Figure 12 is the schematic illustration that air-exhausting duct upper section formation air flow swirl and whirlpool creep up extension,
Figure 13 is stirring effect schematic diagram of the air flow swirl inside film bubble.
Specific embodiment
Shown in Fig. 2, Fig. 4, Fig. 7, which includes columned film-blowing die head 10, vertical interior wind
Pipe 1 and vertical outer air hose 2, are equipped with hair dryer and exhaust fan, the tube wall of interior air hose 1 and outer air hose 2 outside film-blowing die head 10
Airtight, interior air hose 1 and outer air hose 2 are passed down through the central location of film-blowing die head 10, the center of interior air hose 1 and outer air hose 2
Axis (the central axis m of film-blowing die head 10 table in Fig. 5, Fig. 6, Fig. 7 Chong Die with the position central axis m of film-blowing die head 10
Now it is point Z), interior 1 tube wall of air hose and 2 tube wall of outer air hose form concentric circles relationship on floor projection position, including 2 sets of outer air hose
1 outside of air hose, interior air hose 1 extend up to above film-blowing die head 10 from film-blowing die head central location；In the upper of film-blowing die head 10
Side is additionally provided with the external annulus 4 of circular ring shape, and the bottom of external annulus 4 is along close to 10 upper surface of film-blowing die head；The central axis of external annulus 4
Chong Die with the axial centerline of film-blowing die head 10, circular ring shape external annulus 4 offers multiple outlet apertures 41, and outlet aperture 41 exists
The circumferential direction of circular ring shape external annulus 4 and it is vertical on all formed and be uniformly distributed, as shown in Figure 8；The internal diameter of circular ring shape external annulus 4 is greater than outer
The outer diameter of air hose 2；The top of circular ring shape external annulus 4 is connected with circular top cover board 7, outside the diameter and circular ring shape of circular top cover board 7
The diameter of ring wall 4 is equal；11 open top of lumen of the interior air hose is not closed, and interior 1 top of air hose is lower than the circle
Shape lamina tecti 7 has separated one section of vertical distance between the two；
The outer air hose 2 also extends up to the top of film-blowing die head 10 from 10 center of film-blowing die head, outer 2 top of air hose it is vertical
Position is concordant with the vertical position on interior 1 top of air hose；
Be additionally provided with the internal ring wall 3 of circular ring shape inside circular ring shape external annulus 4, the diameter of internal ring wall 3 be greater than the diameter of outer air hose and
Less than the diameter of circular ring shape external annulus 4, the top edge of internal ring wall 3 connects lamina tecti 7, and the bottom of internal ring wall 3 is along close to film-blowing die head 10
Upper surface；Internal ring wall 3 offers multiple small ventilating holes 31, and small ventilating holes 31 are upwardly formed in the week of internal ring wall 3 and are uniformly distributed,
But small ventilating holes 31 are in the vertical upper uneven distribution of internal ring wall 3, and then small ventilating holes 31 are more intensive closer to lower section, such as Fig. 9
It is shown；Vertical position positioned at the small ventilating holes 31 of the top is lower than circular ring shape partition 6, as shown in Figure 3；Interior air hose 1 and exogenous wind
Be formed as the internal layer annular wind chamber 12 of circular ring shape between pipe 2；Shown in Fig. 2, Fig. 4, Fig. 7, formed between outer air hose 2 and internal ring wall 3
The middle layer annular wind chamber 13 of circular ring shape forms the outer annular wind chamber 14 of circular ring shape between internal ring wall 3 and external annulus 4.It is described
Hair dryer is connected to the bottom end of interior air hose lumen 11, and the lumen 11 of the interior air hose is formed as air intake passage；The exhaust fan with
The bottom end of internal layer annular wind chamber 12 is connected to, and the internal layer annular wind chamber 12 is formed as air-out passage.
Shown in Fig. 2, Fig. 4, Fig. 5, Fig. 6, the top cover of the internal layer annular wind chamber 12 is equipped with circular ring shape partition 6, circular ring shape
The vertical position of partition 6 is also lower than lamina tecti 7；The central circular hole 60 of circular ring shape partition 6 is directed at the upper port of interior air hose lumen 11；
The circular ring shape partition 6 is also provided with multiple vents 61, and each vent 61 is uniformly distributed along the circumferential direction of circular ring shape partition 6,
Each vent 61 has been correspondingly connected with an air-exhausting duct 5, and each air-exhausting duct 5 is upward through the circular lamina tecti 7；
Shown in Fig. 2, Figure 10, Figure 11, the air-exhausting duct 5 divides for air-exhausting duct upper section 51 and air-exhausting duct lower section 52, wherein on air-exhausting duct
Section 51 is located at 7 top of lamina tecti, and air-exhausting duct lower section 52 is between lamina tecti 7 and circular ring shape partition 6；Per adjacent two air-exhausting ducts
Air-exhausting duct lower section 52 between be formed with air inlet gap 50；The central part of the circular top cover board 7 is in up big and down small cone
Shape, so that guidance cooling air-flow switchs to horizontal radial from vertical;Central axis of each section of air-exhausting duct upper section 51 about film-blowing die head
Line m forms rotational symmetry relationship；The extending direction of each section of air-exhausting duct upper section 51 and horizontal plane form oblique, in film-blowing die head
Mandrel line m shows as point Z in Figure 11；Air-exhausting duct upper section upper end (as shown in H point in Figure 11) to film-blowing die head central axis m
Distance is greater than the distance that air-exhausting duct upper section lower end (as shown in K point in Figure 11) arrives film-blowing die head central axis m, i.e., in Figure 11,
ZH distance is greater than ZK distance；On horizontal plane, each 51 extending direction of air-exhausting duct upper section and the air-exhausting duct upper section lower end center
The angle for being formed radially 60 ° of point, for example, in Figure 11, wherein the extending direction of one section of each air-exhausting duct upper section 51 is KH, the row
Air hose upper section lower end central point is K point, the radial KM at K point, and in Figure 11, ∠ MKH is 60 °.
Shown in Fig. 2, Figure 10, Figure 11, the top of the circular top cover board 7 is additionally provided with circular ring shape wainscot 9, circular ring shape upper wall
The central axis of plate 9 is Chong Die with the position central axis m of film-blowing die head, and the height of circular ring shape wainscot 9 is greater than air-exhausting duct upper section
51 height, the radius of circular ring shape wainscot 9 are greater than the eccentric distance of 51 upper end of air-exhausting duct upper section (as shown in H point in Figure 11)
All air-exhausting duct upper sections 51 are surrounded by ZH, i.e. circular ring shape wainscot 9.
In above-described embodiment, on horizontal plane, each 51 extending direction of air-exhausting duct upper section and the air-exhausting duct upper section lower end
The radial direction of central point can also be at 45 ° with shape angle, or 90 ° of angle；I.e. in Figure 11, ∠ KMH may be 45 °, or
75 ° or 90 ° of person.
The course of work and principle of above-described embodiment are as follows:
Cooling air-flow is blown into interior air hose lumen 11 by hair dryer, flows up from the lumen 11 of interior air hose, reaches the pipe of interior air hose
Above chamber, then by the air inlet gap 50 between per adjacent two air-exhausting duct lower sections 52, into middle layer annular wind chamber 13, it
Afterwards, the cooling air-flow downlink of middle layer annular wind chamber 13, downlink are gradually progressed by the small ventilating holes 31 of internal ring wall on the way
Outer annular wind chamber 14 is finally blown out by multiple outlet apertures 41 of outer annular wind chamber 14, to carry out to film bubble inner surface
It is cooling；After air-flow implements cooling to film bubble, temperature is gradually risen, and then, high temperature gas flow uplink reaches the headspace of film bubble 8,
And internal layer annular wind chamber 12 is sucked by each air-exhausting duct 5, it flows downward, is finally taken away from the lower end of internal layer annular wind chamber 12, quilt
Exhaust fan is taken away, and air-flow flow process is as shown in Fig. 2, Fig. 3 arrow.
In addition, each section of air-exhausting duct upper section 51 forms rotational symmetry relationship, and each air draft about the central axis m of film-blowing die head
Pipe upper section extending direction is formed radially angle with the air-exhausting duct upper section lower end central point, in this way, air-flow is inhaled on film bubble top
Enter the direction of air-exhausting duct 5 just not instead of along vertical or film-blowing die head radial direction, with the radial shape of film-blowing die head it is at 45 °~
90 ° of angle makes air-flow form high-speed rotating eddy effect in the inner space of circular ring shape wainscot, in addition air-flow is adsorbed
When into the inner space of circular ring shape wainscot 9, can and the inner ring surface of circular ring shape wainscot, circular top cover board 7 upper surface shape
At hitting, reflecting (circular ring shape wainscot has the function of being similar to the Echo Wall, as shown in Fig. 2, Fig. 3 arrow), enhancing air-flow exists
The eddy effect of the inner space of circular ring shape wainscot 9, whirlpool central part air pressure is lower, and the position air pressure of whirlpool periphery compared with
Height, and 51 upper extreme point of air-exhausting duct upper section is located in whirlpool periphery position, thus the high temperature gas flow on film bubble top is conducive to be pressed into
In air-exhausting duct；And above-mentioned eddy effect can also be transmitted all the way up inside film bubble and extend, and 8 inside the top position of film bubble is made
Air also forms whirlpool, and as shown in Figure 12 and Figure 13, swirl center forms low pressure, and the air for being conducive to the top inside film bubble stirs
It moves and is sucked away, the air of 8 inside the top of film bubble is avoided to form the dead angle that will not be flowed, to avoid the top inside film bubble
Air be difficult to take away and significantly heat up, in short, the present invention can take as early as possible the highest air of film bubble internal temperature away, and
Air-flow is avoided to be partially formed dead angle inside film bubble and constantly heat up, to be more advantageous to whole cooling effect.
Claims (3)
1. a kind of plastic film blowing machine inner-cooling structure, including columned film-blowing die head, vertical interior air hose and vertical outer air hose,
Hair dryer and exhaust fan are equipped with outside film-blowing die head, the tube wall of interior air hose and outer air hose is airtight, interior air hose and outer air hose
Be passed down through the central location of film-blowing die head, the central axis of interior air hose and outer air hose with the axial centerline of film-blowing die head
Overlapping, interior air hose and outer air hose form concentric circles relationship on floor projection position, and outer duct sleeve is outside interior air hose, interior air hose
It is extended up to above film-blowing die head from film-blowing die head central location, interior air hose is extended up to from film-blowing die head central location to be blown
Above film die head；It is additionally provided with the external annulus of circular ring shape above film-blowing die head, the bottom of external annulus is along close to table on film-blowing die head
Face, the central axis of external annulus are also Chong Die with the axial centerline of film-blowing die head；Circular ring shape external annulus offers multiple outlets
Aperture, outlet aperture are upwardly formed in the week of circular ring shape external annulus and are uniformly distributed, and the internal diameter of circular ring shape external annulus is greater than outer air hose
Outer diameter；It is connected with circular top cover board at the top of circular ring shape external annulus, the diameter of circular top cover board is straight with circular ring shape external annulus
Diameter is equal, and the diameter of circular top cover board is equal with the diameter of circular ring shape external annulus；It is characterized in that it is characterized by: the interior wind
The lumen open top of pipe, the interior air hose top be lower than the circular top cover board, separated between the two one section vertically away from
From；The outer air hose also extends up to above film-blowing die head from film-blowing die head center, the vertical position at exogenous wind tube top end with it is interior
The vertical position on air hose top is concordant；The internal ring wall of circular ring shape is additionally provided with inside circular ring shape external annulus, the diameter of internal ring wall is big
It is less than circular ring shape external annulus in outer air hose, the top edge of internal ring wall connects lamina tecti, and the bottom of internal ring wall is along close to film-blowing die head
Upper surface；Internal ring wall offers multiple small ventilating holes, and small ventilating holes are upwardly formed in the week of internal ring wall and are uniformly distributed, but it is small to breathe freely
Uneven distribution is gone up in the vertical of internal ring wall in hole, and then small ventilating holes are more intensive closer to lower end；Between interior air hose and outer air hose
Be formed as the internal layer annular wind chamber of circular ring shape；The middle layer annular wind chamber of circular ring shape, inner ring are formed between outer air hose and internal ring wall
The outer annular wind chamber of circular ring shape is formed between wall and external annulus；The hair dryer is connected to the bottom end of interior air hose lumen, described
The segment dislocation of interior air hose is air intake passage；The exhaust fan is connected to the bottom end of internal layer annular wind chamber, the internal layer annular wind
Chamber is formed as air-out passage；The top cover of the internal layer annular wind chamber is equipped with circular ring shape partition, the vertical position of circular ring shape partition
Also lower than lamina tecti；The central circular hole of circular ring shape partition is directed at the upper port of interior air hose；It is small that internal ring wall is located at breathing freely for the top
The vertical position in hole is lower than circular ring shape partition；The circular ring shape partition is also provided with multiple vents, and each vent is along annulus
The circumferential direction of shape partition is uniformly distributed, and each vent has been correspondingly connected with an air-exhausting duct, and each air-exhausting duct is upward through the circle
The lamina tecti of shape；The air-exhausting duct is divided into air-exhausting duct upper section and air-exhausting duct lower section, and wherein air-exhausting duct upper section is located above lamina tecti,
Air-exhausting duct lower section is between lamina tecti and circular ring shape partition；Per adjacent two air-exhausting ducts air-exhausting duct lower section between be formed with into
Wind gap；Each section of air-exhausting duct upper section forms rotational symmetry relationship about the central axis of film-blowing die head；Each section of air-exhausting duct upper section
Extending direction and horizontal plane form oblique, and the distance of air-exhausting duct upper section upper end to film-blowing die head central axis is greater than air-exhausting duct upper section
Distance of the lower end to film-blowing die head central axis；On horizontal plane, on each air-exhausting duct upper section extending direction and the air-exhausting duct
The radial shape of section lower end central point is at 45 °~90 ° of angle；It is additionally provided with circular ring shape wainscot above the circular top cover board,
The central axis of circular ring shape wainscot and the axial centerline of film-blowing die head are Chong Die, and the height of circular ring shape wainscot is greater than air draft
The height of pipe upper section, the radius of circular ring shape wainscot are greater than the eccentric distance of air-exhausting duct upper section upper end, and the half of circular ring shape wainscot
Diameter is greater than the eccentric distance of air-exhausting duct upper section upper end.
2. inner-cooling structure according to claim 1, it is characterised in that it is characterized by: each air-exhausting duct upper section extending direction with
The angle for being formed radially 60 °~75 ° of the air-exhausting duct upper section lower end central point.
3. the 1 plastic film blowing machine inner-cooling structure according to claim, it is characterised in that it is characterized by: the circular top cover
The central part of plate is in up big and down small cone shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810363480.6A CN109605720B (en) | 2018-04-21 | 2018-04-21 | Inner cooling structure of plastic film blowing machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810363480.6A CN109605720B (en) | 2018-04-21 | 2018-04-21 | Inner cooling structure of plastic film blowing machine |
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| Publication Number | Publication Date |
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| CN109605720A true CN109605720A (en) | 2019-04-12 |
| CN109605720B CN109605720B (en) | 2020-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810363480.6A Active CN109605720B (en) | 2018-04-21 | 2018-04-21 | Inner cooling structure of plastic film blowing machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111929026A (en) * | 2020-09-29 | 2020-11-13 | 中国空气动力研究与发展中心低速空气动力研究所 | Low-frequency pressure pulsation suppression method for wind tunnel 3/4 opening test section |
| CN116572518A (en) * | 2023-07-13 | 2023-08-11 | 山东方大新材料科技有限公司 | Film blowing mechanism of film blowing machine |
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| CN107053648A (en) * | 2017-05-26 | 2017-08-18 | 广东金明精机股份有限公司 | Upward type internal cooling structure for multilayer co-extrusion film blowing machine |
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| US3714309A (en) * | 1970-08-11 | 1973-01-30 | Gen Engineering Co | Manufacture of plastic film |
| US4115048A (en) * | 1976-12-27 | 1978-09-19 | Union Carbide Corporation | Apparatus for internally cooling a plastic tubular film bubble |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111929026A (en) * | 2020-09-29 | 2020-11-13 | 中国空气动力研究与发展中心低速空气动力研究所 | Low-frequency pressure pulsation suppression method for wind tunnel 3/4 opening test section |
| CN111929026B (en) * | 2020-09-29 | 2020-12-15 | 中国空气动力研究与发展中心低速空气动力研究所 | Low-frequency pressure pulsation suppression method for wind tunnel 3/4 opening test section |
| CN116572518A (en) * | 2023-07-13 | 2023-08-11 | 山东方大新材料科技有限公司 | Film blowing mechanism of film blowing machine |
| CN116572518B (en) * | 2023-07-13 | 2023-09-19 | 山东方大新材料科技有限公司 | Film blowing mechanism of film blowing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109605720B (en) | 2020-11-03 |
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