CN108422647A - A kind of caterpillar stepless cross directional stretch method and device of film of binding - Google Patents
A kind of caterpillar stepless cross directional stretch method and device of film of binding Download PDFInfo
- Publication number
- CN108422647A CN108422647A CN201810465375.3A CN201810465375A CN108422647A CN 108422647 A CN108422647 A CN 108422647A CN 201810465375 A CN201810465375 A CN 201810465375A CN 108422647 A CN108422647 A CN 108422647A
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- China
- Prior art keywords
- film
- crawler belt
- tensioned lines
- caterpillar
- interior
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Classifications
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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
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
- B29C55/08—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique transverse to the direction of feed
Abstract
The present invention discloses a kind of caterpillar stepless cross directional stretch method and device of film of binding, its method is fixedly clamped to film two sides edge using the crawler belt drawing mechanism of film both sides, film is conveyed by crawler belt drawing mechanism simultaneously, as the lateral distance between the crawler belt drawing mechanism of film both sides gradually increases, film stretches, flat shape is presented in drawing process, and film by cross force, realizes the cross directional stretch of film in the plane.Its device includes symmetrically arranged two crawler belt drawing mechanisms, is in lateral distance gradually increased splayed distribution between two crawler belt drawing mechanisms；Each crawler belt drawing mechanism respectively includes transfer assembly, interior tensioned lines and outer tensioned lines, interior tensioned lines are coated on transfer assembly surface, outer tensioned lines are set to interior tensioned lines side, and a contact surface is formed between interior tensioned lines and outer tensioned lines, the both sides of film are compressed by contact surface, conveyed and are stretched respectively.Simple, the easily controllable and obtained film excellent combination property of the principle of the invention.
Description
Technical field
The present invention relates to processing of high molecular material technical field, more particularly to a kind of caterpillar stepless transverse direction of film of binding
Drawing process and device.
Background technology
With the rapid development of raising and various functions film market that packaging industry requires packing material, biaxially oriented film
Due to good tensile property, tensile strength are one times of non-stretched film, barrier property is preferable, optical property is preferable,
With multiple performances such as higher heat-resisting cold resistance, dimensional stability and thickness evenness, and the fast, production capacity with speed of production
Greatly, the features such as efficient, is increasingly becoming focus of people's attention.
Biaxially oriented film technology, which has, gradually to be stretched and synchro-draw two major classes.Biaxial tension on domestic and international market at present
Thin film technique mainly uses gradually stretching technique.Gradually stretching technique is first to carry out longitudinal drawing to film using high low speed draw roll
It stretches, then cross directional stretch is carried out to film using transverse stretching machine.Transverse drawing mill is opening certain angle by two groups of chains with clip
Horizontal rotation makes film carry out cross directional stretch in the track of degree.Gradually stretching technique makes it with film gauge uniformity hardly possible
With control, device structure is huge, energy consumption is big, transverse temperature difference is difficult to control, of high cost the features such as.German Bruckner company is by electromagnetism
Technology is applied in biaxial tension equipment, in conjunction with itself membrane equipment development outgoing-line type synchronous motor work work synchro-draw equipment.
The synchro-draw technology makes biaxially oriented film with common gradually stretcher production with more excellent characteristic.But
The synchro-draw technology makes the alternating current generator that the chain folder that sliding block carries has synchronous linear response respectively drive so that the system of equipment
This raising, energy consumption is caused to increase, while the technology has the features such as being difficult to control and huge device structure.
It huge, high cost, high energy consumption and is difficult to control for device structure existing for current biaxial tension technology and equipment
The problems such as, a kind of novel cross directional stretch method and apparatus of exploitation is of great significance to solve problem above.
Invention content
It is simple, easily controllable and obtained that it is an object of the invention to overcome the deficiencies of the prior art and provide a kind of principles
The stepless cross directional stretch method of the caterpillar film of binding of film excellent combination property.
Another object of the present invention is to provide a kind of stepless cross of caterpillar film of the binding for realizing the above method
To stretching device.
The technical scheme is that：A kind of caterpillar stepless cross directional stretch method of film of binding, is stretching in film
In the process, it is fixedly clamped to the two sides edge of film using the crawler belt drawing mechanism of film both sides, meanwhile, film is stretched by crawler belt
Mechanism is conveyed, and as the lateral distance between the crawler belt drawing mechanism of film both sides gradually increases, film stretches, drawing process
Flat shape is presented, film by cross force, realizes the cross directional stretch of film in the plane.
A kind of caterpillar stepless transversal stretching device of film of binding, including symmetrically arranged two crawler belt drawing mechanisms,
In lateral distance gradually increased splayed distribution between two crawler belt drawing mechanisms；Each crawler belt drawing mechanism respectively includes transmitting
Component, interior tensioned lines and outer tensioned lines, interior tensioned lines are coated on transfer assembly surface, and outer tensioned lines are set to interior tensioned lines side,
And a contact surface is formed between interior tensioned lines and outer tensioned lines, the both sides of film are compressed by contact surface, are conveyed respectively
And stretching.Wherein, film is clamped and fixed in the contact surface between interior tensioned lines and outer tensioned lines, in the drive of transfer assembly
Under, interior tensioned lines and the synchronous operation of outer tensioned lines, during conveying film, due to the cross between two crawler belt drawing mechanisms
Gradually increase to distance, so film is also gradually stretched.
The transfer assembly includes crawler belt, driving wheel and driven wheel, and crawler belt is arranged in racetrack, driving wheel and driven wheel point
Not She Yu crawler belt both ends, interior tensioned lines are coated on the outer surface of crawler belt, the contact surface between interior tensioned lines and outer tensioned lines
Positioned at the lower part of crawler belt.
The both sides up and down of the contact surface, which further respectively have, pre-tightens gear and smooth guide wheel, pre-tightens gear and is set on the inside of crawler belt
And it is in mating connection with crawler belt inside, smooth guide wheel is set to below outer tensioned lines and connects with the bottom surface of outer tensioned lines.Pre-tighten tooth
Wheel and smooth guide wheel composition hold down assembly, and tension are played to crawler belt and interior tensioned lines, outer tensioned lines, to make contact surface to thin
Film has stronger pressuring action.
The length of the contact surface is greater than or equal to the long side length of crawler belt, and film enters contact surface from one end of crawler belt,
It is sent out from the other end of crawler belt after stretched.
The outer tensioned lines are equipped with tensioning wheel and multiple directive wheels, and outer tensioned lines are wound in tensioning wheel and multiple directive wheels
On.Wherein, outer tensioned lines ensure its installation site by the directive wheel of several fixations on the supporting plate, and are provided with position wherein
Adjustable tensioning wheel is set, makes outer tensioned lines that can keep some tension.
The outer tensioned lines are in concave shape, and the middle part of outer tensioned lines is interior concave plane, and interior tensioned lines and transfer assembly are set to
On interior concave plane.
Support plate is additionally provided in the crawler belt drawing mechanism, transfer assembly, interior tensioned lines and outer tensioned lines are mounted on branch
On the same side of fagging, the support plate on two crawler belt drawing mechanisms is symmetrical in splayed.
Two outsides of the support plate are respectively equipped with fromer rail and rear rail, and a side edge of support plate is equipped with and fromer rail
The other side edge of matched front-slider, support plate is equipped with and the matched rear slider of rear rail.By front-slider with it is leading
The cooperation of rail, the cooperation of rear slider and rear rail, are adjusted the distance between two crawler belt drawing mechanisms and each crawler belt stretches
The inclination angle of mechanism, to control the level of stretch of film.
In described two crawler belt drawing mechanisms, the inclination angle beta of each support plate is 0 °<β<90°.
The stepless transversal stretching device of the above-mentioned caterpillar film of binding in use, along film conveying direction, in film
After preheating, film enters one end of two of which crawler belt drawing mechanism, and in each crawler belt drawing mechanism, interior tensioned lines flexible are attached
The outer tensioned lines flexible that about half cycle is distributed on the outside of track surface, crawler belt.Two symmetrical point of crawler belt drawing mechanisms
Cloth, film enter the mechanism after warming, and the interior tensioned lines of track surface have with outer tensioned lines at the contact surface of its formation
There is frictional force, with the rotation of crawler belt, film advances under the drive of inside and outside tensioned lines.Since the crawler belt of the left and right sides is drawn
It stretches mechanism and splayed distribution is presented, so with the gradual increase of lateral distance between two crawler belt drawing mechanisms, film is realized
Cross directional stretch.Angle (i.e. above-mentioned 0 ° of the angle of inclination that its cross directional stretch ratio passes through crawler belt drawing mechanism<β<90 °) it determines.
The present invention compared with the existing technology, has the advantages that：
1, thin under the action of track tensioning force in the stepless cross directional stretch method and device of the caterpillar film of this binding
Film stretching process presents plane, avoids the unbalance stress that bending generates, is conducive to the molding of film.
It 2, can be by adjusting front-slider and rear slider in the stepless cross directional stretch method and device of the caterpillar film of this binding
The corresponding position on fromer rail and rear rail changes the angle of each crawler belt drawing mechanism, so as to adjust cross directional stretch ratio, utilizes
Inside and outside tensioned lines realize that the stepless of film is laterally drawn to the continuous encircling effect of film and the stretching action of crawler belt traveling process
It stretches, drawing force is uniform, and the product uniformity is higher after stretching.
3, in the stepless cross directional stretch method and device of the caterpillar film of this binding, during cross directional stretch, inside and outside
It is contacted for line between tight rope and film, avoiding leads to the stress of film edge in drawing process because of the gap of conventional snap not
Uniform phenomenon is conducive to the uniformity for improving film article thickness.
4, in this course of work for bundling the stepless transversal stretching device of caterpillar film, inside and outside tensioned lines exist always
Operation in approximately the same plane, there is no the complex deformations such as spatial warping, and the width of inside and outside tensioned lines is unrestricted, meanwhile, interior,
Outer tensioned lines are without overcoming frictional resistance, and it is small to bear load, longer life expectancy.
5, in the stepless transversal stretching device of the caterpillar film of this binding, the winding of inside and outside tensioned lines compresses mode and fortune
Row track is simple, and the synchro-draw of herringbone wheel unit is easy to control, and the structure and part of device are simple, easy to manufacture assembly, right
Fundamental technology requirement is relatively low, avoids precision of the conventional snap formula stretching device to guide precision, motor driving and control system
It is required that the problems such as harsh, can effectively reduce the processing cost of film line.
Description of the drawings
Fig. 1 is the principle schematic that this bundlees the stepless transversal stretching device of caterpillar film.
Fig. 2 is the A-A direction views of Fig. 1.
Specific implementation mode
With reference to embodiment, the present invention is described in further detail, and embodiments of the present invention are not limited thereto.
Embodiment
A kind of caterpillar stepless transversal stretching device of film of binding of the present embodiment, as shown in Figure 1, including symmetrically arranged
Two crawler belt drawing mechanisms, in lateral distance gradually increased splayed distribution between two crawler belt drawing mechanisms.Each crawler belt is drawn
Mechanism is stretched as shown in Fig. 2, including mainly transfer assembly, interior tensioned lines 1, outer tensioned lines 2 and support plate 3, and interior tensioned lines are coated on
Transfer assembly surface, outer tensioned lines are set to interior tensioned lines side, and a contact surface is formed between interior tensioned lines and outer tensioned lines,
The both sides of film are compressed by contact surface, conveyed and are stretched respectively.Transfer assembly includes crawler belt 4, driving wheel 5 and driven wheel
6, crawler belt is arranged in racetrack, and driving wheel and driven wheel are respectively arranged on the both ends of crawler belt, and interior tensioned lines are coated on the appearance of crawler belt
On face, the contact surface between interior tensioned lines and outer tensioned lines is located at the lower part of crawler belt.The both sides up and down of contact surface further respectively have
Gear 7 and smooth guide wheel 8 are pre-tightened, it is on the inside of crawler belt and in mating connection with crawler belt inside to pre-tighten gear, and smooth guide wheel is set to
Connect below outer tensioned lines and with the bottom surface of outer tensioned lines.It pre-tightens gear and smooth guide wheel composition holds down assembly, to crawler belt and interior
Tensioned lines, outer tensioned lines play tension, to make contact surface have stronger pressuring action to film.Outer tensioned lines are equipped with
Tensioning wheel 9 and multiple directive wheels 10, outer tensioned lines are wound on tensioning wheel and multiple directive wheels.
As shown in Fig. 2, film 11 is got to know 12 extrusions or after certain preheating temperature by extruder, into this binding
The caterpillar stepless transversal stretching device of film.Along shoe under the frictional force and drag of both outer tensioned lines and interior tensioned lines
The long side side of band moves.There are several transmission gears (i.e. above-mentioned driving wheel, driven wheel and preload gear), wherein position in crawler belt
In crawler belt both ends two gears respectively as crawler belt driving wheel and driven wheel.It is to ensure there is one between crawler belt positioned at intermediate gear
Level pressure clamp force, be set as can with the preload gear of up and down adjustment, crawler belt and the cooperation side-lower of outer tensioned lines there are one can on
The smooth guide wheel of compression (i.e. above-mentioned smooth guide wheel) of lower adjusting.It is pre-tightened gear by upper and lower when film is in the middle part of crawler belt and smooth leads
The pressuring action of wheel ensures that drawing process has enough cross forces.It after stretched, leaves, is leading from the other side of crawler belt
Enter cooling and shaping unit to the effect of roller 13 and carries out following process.
In the stepless transversal stretching device of the caterpillar film of above-mentioned binding, outer tensioned lines pass through several directive wheels and upper
Under adjustable tensioning wheel fix on the supporting plate, and ensure that when contacting with crawler belt enough frictional force can be generated.
As shown in Figure 1, the stepless transversal stretching device of the above-mentioned caterpillar film of binding passes through front-slider 14 and rear slider 15
The horizontal side-to-side movement of carry out on fromer rail 16 and rear rail 17 can be corresponded to.And on same guide rail, the shoe of the left and right sides
Sliding speed with drawing mechanism with apart from identical, to ensure its symmetry.It is stretched by adjusting each crawler belt among drawing process
The size of the angle β of mechanism realizes the adjustment of cross directional stretch ratio.
The space structure that the film produced by the above-mentioned mode of production is presented in drawing process is horizontal plane type, is improved
The uniformity and continuity that film stretches.What is utilized in film built-in edge is two flexible strands (i.e. above-mentioned interior tensioned lines and outer
Tensioned lines) between frictional force, be linear force, avoid tradition machinery clamp structure point contact generation stress concentration
Influence to film, drawing process only have film edge and are contacted with equipment, and film surface does not damage film table without frictionally damage
Face.
As described above, the present invention can be better realized, above-described embodiment is only presently preferred embodiments of the present invention, is not used
To limit the practical range of the present invention；It is i.e. all according to equivalent changes and modifications made by the content of present invention, all wanted for right of the present invention
Range claimed is asked to be covered.
Claims (10)
1. a kind of caterpillar stepless cross directional stretch method of film of binding, which is characterized in that in film in drawing process, utilize
The crawler belt drawing mechanism of film both sides is fixedly clamped to the two sides edge of film, meanwhile, film is carried out defeated by crawler belt drawing mechanism
It send, as the lateral distance between the crawler belt drawing mechanism of film both sides gradually increases, film stretches, and planar shaped is presented in drawing process
Shape, film by cross force, realize the cross directional stretch of film in the plane.
2. a kind of caterpillar stepless transversal stretching device of film of binding, which is characterized in that including symmetrically arranged two crawler belts
Drawing mechanism, in lateral distance gradually increased splayed distribution between two crawler belt drawing mechanisms；Each crawler belt drawing mechanism point
Not Bao Kuo transfer assembly, interior tensioned lines and outer tensioned lines, interior tensioned lines are coated on transfer assembly surface, and outer tensioned lines are set to interior
Tight rope side, and a contact surface is formed between interior tensioned lines and outer tensioned lines, the both sides of film are carried out by contact surface respectively
It compresses, convey and stretches.
3. a kind of caterpillar stepless transversal stretching device of film of binding according to claim 2, which is characterized in that the biography
Sending component includes crawler belt, driving wheel and driven wheel, and crawler belt is arranged in racetrack, and driving wheel and driven wheel are respectively arranged on the two of crawler belt
End, interior tensioned lines are coated on the outer surface of crawler belt, and the contact surface between interior tensioned lines and outer tensioned lines is located at the lower part of crawler belt.
4. a kind of caterpillar stepless transversal stretching device of film of binding according to claim 3, which is characterized in that described to connect
The both sides up and down of contacting surface, which further respectively have, pre-tightens gear and smooth guide wheel, pre-tighten gear be set on the inside of crawler belt and with phase on the inside of crawler belt
It is connected, smooth guide wheel is set to below outer tensioned lines and connects with the bottom surface of outer tensioned lines.
5. a kind of caterpillar stepless transversal stretching device of film of binding according to claim 3, which is characterized in that described to connect
The length of contacting surface is greater than or equal to the long side length of crawler belt, and film enters contact surface from one end of crawler belt, it is stretched after from shoe
The other end of band is sent out.
6. a kind of caterpillar stepless transversal stretching device of film of binding according to claim 2, which is characterized in that described outer
Tensioned lines are equipped with tensioning wheel and multiple directive wheels, and outer tensioned lines are wound on tensioning wheel and multiple directive wheels.
7. a kind of caterpillar stepless transversal stretching device of film of binding according to claim 2, which is characterized in that described outer
Tensioned lines are in concave shape, and the middle part of outer tensioned lines is interior concave plane, and interior tensioned lines and transfer assembly are set on interior concave plane.
8. a kind of caterpillar stepless transversal stretching device of film of binding according to claim 2, which is characterized in that the shoe
It is additionally provided with support plate in band drawing mechanism, transfer assembly, interior tensioned lines and outer tensioned lines are mounted on the same side of support plate,
Support plate on two crawler belt drawing mechanisms is symmetrical in splayed.
9. a kind of caterpillar stepless transversal stretching device of film of binding according to claim 8, which is characterized in that the branch
Two outsides of fagging are respectively equipped with fromer rail and rear rail, and a side of support plate is matched advancing slip with fromer rail along being equipped with
The other side edge of block, support plate is equipped with and the matched rear slider of rear rail.
10. a kind of caterpillar stepless transversal stretching device of film of binding according to claim 8, which is characterized in that described
In two crawler belt drawing mechanisms, the inclination angle beta of each support plate is 0 °<β<90°.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810465375.3A CN108422647A (en) | 2018-05-16 | 2018-05-16 | A kind of caterpillar stepless cross directional stretch method and device of film of binding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810465375.3A CN108422647A (en) | 2018-05-16 | 2018-05-16 | A kind of caterpillar stepless cross directional stretch method and device of film of binding |
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| Publication Number | Publication Date |
|---|---|
| CN108422647A true CN108422647A (en) | 2018-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810465375.3A Pending CN108422647A (en) | 2018-05-16 | 2018-05-16 | A kind of caterpillar stepless cross directional stretch method and device of film of binding |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114368176A (en) * | 2022-01-14 | 2022-04-19 | 宿迁市金田塑业有限公司 | Preparation process and automatic production line of biaxially oriented polyethylene heat-sealing film |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0236171A1 (en) * | 1986-01-29 | 1987-09-09 | Societe Francaise D'extrusion Et De Calandrage (Sfec) | Device for the continuous transverse stretching of a plastic film |
| CN102950763A (en) * | 2011-08-17 | 2013-03-06 | 莱芬豪舍机械制造两合公司 | Method and apparatus for producing film web from thermoplastic material and film produced thereby |
| CN104723546A (en) * | 2015-03-25 | 2015-06-24 | 华南理工大学 | Stepless biaxial tension method and device for film based on saddle surface transition |
| WO2017215731A1 (en) * | 2016-06-13 | 2017-12-21 | Globra Gmbh | Basic structure, device and method for transporting films |
| CN208290469U (en) * | 2018-05-16 | 2018-12-28 | 华南理工大学 | A kind of caterpillar stepless transversal stretching device of film of binding |
-
2018
- 2018-05-16 CN CN201810465375.3A patent/CN108422647A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0236171A1 (en) * | 1986-01-29 | 1987-09-09 | Societe Francaise D'extrusion Et De Calandrage (Sfec) | Device for the continuous transverse stretching of a plastic film |
| CN102950763A (en) * | 2011-08-17 | 2013-03-06 | 莱芬豪舍机械制造两合公司 | Method and apparatus for producing film web from thermoplastic material and film produced thereby |
| CN104723546A (en) * | 2015-03-25 | 2015-06-24 | 华南理工大学 | Stepless biaxial tension method and device for film based on saddle surface transition |
| WO2017215731A1 (en) * | 2016-06-13 | 2017-12-21 | Globra Gmbh | Basic structure, device and method for transporting films |
| CN208290469U (en) * | 2018-05-16 | 2018-12-28 | 华南理工大学 | A kind of caterpillar stepless transversal stretching device of film of binding |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114368176A (en) * | 2022-01-14 | 2022-04-19 | 宿迁市金田塑业有限公司 | Preparation process and automatic production line of biaxially oriented polyethylene heat-sealing film |
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