CN1486838A - Chain temperature maintaining system for synchronous film stretcher - Google Patents
Chain temperature maintaining system for synchronous film stretcher Download PDFInfo
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- CN1486838A CN1486838A CNA031401015A CN03140101A CN1486838A CN 1486838 A CN1486838 A CN 1486838A CN A031401015 A CNA031401015 A CN A031401015A CN 03140101 A CN03140101 A CN 03140101A CN 1486838 A CN1486838 A CN 1486838A
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- chain
- temperature
- constant temperature
- passage
- film
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- 230000001360 synchronised effect Effects 0.000 title abstract 2
- 238000009413 insulation Methods 0.000 claims description 17
- 239000000498 cooling water Substances 0.000 claims description 13
- 239000000523 sample Substances 0.000 claims description 12
- 238000009529 body temperature measurement Methods 0.000 claims description 7
- 239000012774 insulation material Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 239000004952 Polyamide Substances 0.000 abstract description 8
- 229920002647 polyamide Polymers 0.000 abstract description 8
- 238000007664 blowing Methods 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 description 41
- 239000010410 layer Substances 0.000 description 23
- 239000010408 film Substances 0.000 description 16
- 238000013461 design Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000013021 overheating Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
The present invention is one chain temperature maintaining system for controlling the temperature of the chain in back stroke during bi-directional synchronous stretching of polyamide film. The chain temperature maintaining system includes circularly rotating chain; constant temperature channel in the back stroke area of the chain comprising blowing pipe, exhaust pipe, blower and exhauster; temperature measurer set in the stretching area; and controller connected to the temperature measurer and blower. The present invention makes the chain after being used in stretching be cooled fast and maintained in stand-by temperature, and the small temperature fluctuation can avoid negative influence on stretching thick sheet into film and ensure excellent production state and stable product quality.
Description
Technical field
The present invention relates to a kind of chain constant temperature system of film synchro-draw machine, especially the chain constant temperature system in bi-directional synchronization drawing polyamide thin film fabrication technology.
Background technology
In the manufacturing process of bi-directional synchronization drawing polyamide film, not typing, after the not drawing polyamide film sheet of orientation is not clamped the baking oven that the sheet both sides enter the synchro-draw machine by the chain chain, after the process preheating, carry out vertically (MD) and laterally (TD) stretching simultaneously, after passing through thermal finalization and temper then, become the bi-directional synchronization oriented film.The baking oven of synchro-draw machine divides preheating zone, drawing zone, heat set zone, temper district.According to the difference of production technology, the temperature in each district is at 120 ℃～230 ℃.Chain can be heated after distinguishing through each, so chain need add cooling system when not pressing from both sides the backhaul of sheet.
Sheet is when preheating, and limit portion is adjacent because of chain chain folder, and the heating efficiency deficiency of hot blast opposite side portion is so the preheating of limit portion is subjected to chain chain folder temperature effect very big.The temperature of chain is crossed when cold, can cause sheet limit portion because of the preheating deficiency, and difficulty stretches when longitudinal stretching.Not only can't film forming when serious, also can be because of the difficulty that stretches, stress is excessive and damage stretcher.But, during the temperature overheating of chain, can cause sheet limit portion to be heated too much, with sheet middle part preheating excessive temperature differentials, cause to stretch inhomogeneously, influence product quality.When if the temperature overheating of chain is serious, the easy drawing crack of sheet limit portion and rupture of membranes.Simultaneously, the chain temperature overheating also can destroy the lubricated and parts of chain rotating part, makes chain impaired.
In the present bi-directional synchronization drawing polyamide thin-film technique, the mode of chain cooling just adopts blows a certain amount of natural wind and cools off, and the temperature of chain is not accurately controlled.Therefore, along with the difference of the speed of service of chain, the cooling effect of chain is also inequality, and is fairly obvious to the influence of bi-directional synchronization drawing polyamide thin-film technique.Especially when start, shutdown, the temperature fluctuation of chain is very big, the film forming situation when this moment, directly influence was started shooting.When ordinary production, because the temperature of natural environment often changes, the temperature of chain is fluctuation thereupon also, and the fluctuation meeting of production status directly influences the product quality of polyamide film.
Summary of the invention
The object of the present invention is to provide a kind of chain constant temperature system of in the manufacturing process of bi-directional synchronization drawing polyamide film, the chain temperature in the backhaul accurately being controlled, reduce the temperature fluctuation of chain.
The chain constant temperature system of a kind of film synchro-draw machine of the present invention comprises the chain of cycle rotation in the backhaul district of chain the constant temperature passage being set that the constant temperature passage is provided with blast pipe and exhaust duct, and the mouth of pipe is respectively equipped with pressure fan and exhaust blower; Drawing zone at chain is provided with temperature measuring equipment, is being connected controller between temperature measuring equipment and the pressure fan.
Described temperature measuring equipment can be installed in the optional position of the drawing zone of chain.The temperature measuring equipment first-selection is installed in the original position of the drawing zone of chain.The chain folder of this original position is convenient to continuous temperature measurement than comparatively dense.
The present invention adopts temperature measuring equipment, and first-selection is the Non-contact Infrared Temperature Measurement device.The chain that this temperature measuring equipment is moving to not stall in film synchro-draw machine especially to the chain in backhaul district, is implemented the continuous uninterrupted temperature survey.Give controller with measurement feedback then, controller is exported to the pressure fan driver with control signal after PID (PID) computing, and control pressure fan rotating speed is realized the automatic control to cooling air quantity.With this amount of cooling water, realize the purpose of control chain temperature by the control chain.The present invention can adopt the automatic or manual control mode to finish control to cooling air quantity.Rotation speed of fan can adopt all motor speed control devices such as frequency converter.The control of cooling air quantity can adopt airduct gate, blower fan to drive all prior aries that wind flow, flow velocity are controlled such as speed governing.Motor driver can be to separate with blower fan, is used to regulate wind speed.
Chain when entering the backhaul district, is not carried film secretly after finishing the end of sheet drawing process.This moment, chain entered the constant temperature passage, had a large amount of 15～30 ℃ cooling airs to be blown in the constant temperature passage, with overheated chain cooling.Because the whole piece chain all moves in baking oven, the temperature in the baking oven has 120 ℃～230 ℃, and cooling air is 15～30 ℃, so the constant temperature passage is heat insulation very important.
Constant temperature passage of the present invention is wrapped in heat-insulation layer, to prevent the cooling and the constant temperature of the temperatures involved chain in the baking oven.Heat-insulation layer can be the high temperature insulating material of individual layer, and this heat-insulation layer requires high and thick.More excellent scheme is to adopt the design of three layers of heat-insulation layer, to realize better effect of heat insulation.Heat-insulation layer is three layers, and internal layer is the high-temperature-resistant thermal-insulation material, and the intermediate layer is the air layer of sealing, and skin is the high-temperature-resistant thermal-insulation material.The design of heat-insulation layer guarantees that chain can be cooled to desired temperature.
Heat-insulation layer of the present invention also can be equiped with locking device, can open rapidly when needed, conveniently to check, to safeguard chain.
The present invention is cold by force in the middle of adopting, the mode of the two-way cooling of two ends forced-ventilated designs the constant temperature passage.Described blast pipe is located at the interlude of constant temperature passage, and described exhaust duct is located at the two ends of constant temperature passage.When the present invention can solve unidirectional blowing cooling, chain single face good cooling results, back side cooling is not good, and causes the even problem of chain inhomogeneous cooling, thus guarantee chain can be efficiently, cooling equably.
Strong cold be to adopt powerful blower fan to be blown in a large number after temperature control temperature constant at 15～30 ± 1 ℃ cooling air.The cooling air inlet design is adopted the blower fan forced-ventilated at the interlude of constant temperature passage at constant temperature passage two ends.The flow direction of cooling air is that the centre from the constant temperature passage enters, and flows in the two ends to the constant temperature passage under the effect of constant temperature passage two ends blower fan forced-ventilated.
The cooling air of the constant temperature passage of driving side and fore side both sides chain is independent control.Article two, the shared same forced-ventilated airduct in the constant temperature passage two ends of chain.Also can adopt the air intake of two chains, the mode that air draft is independently controlled.
The wall scroll cooling duct also can adopt two or more blast pipes to be blown into cooling air, the design of two or more exhaust duct forced-ventilated wind.
Because natural wind is subjected to the influence of external environment condition, variations in temperature is very big.For addressing this problem, the present invention is installed cooling system additional before the air port that sucks, and with the wind of cold water cooling suction, and adopts temperature control system to control the temperature of cooling air, makes the cooling air temperature keep constant.
The present invention is equipped with heat exchanger at the mouth of pipe of blast pipe, as water-cooled heat exchanger.Heat exchanger the place ahead is provided with temperature probe, is being connected controller between temperature probe and the cooling water control valve, as PID (PID) controller.
The present invention adds assembling heat exchanger at the mouth of pipe of blast pipe, and heat exchanger feeds 10 ℃ cooling water as cooling agent.After natural wind passes through heat exchanger, temperature probe is measured the temperature through cooled cooling air, the measured value via controller of temperature, adopt the flow of pid control mode control cooling water, just control amount of cooling water, thereby the amount of cooling water of control natural wind when over-heat-exchanger reaches the purpose of controlling the cooling air temperature.Through this temperature control system, the most at last the cooling air temperature be controlled at ± 1 ℃.
Chain constant temperature system of the present invention has overcome the common fault of existing film synchro-draw machine, and promptly chain cooling effect in the backhaul of not pressing from both sides sheet is not good, and temperature is non-constant, and cold and hot temperature difference fluctuation is bigger.The present invention is by the setting of constant temperature passage, the design of air-supply, exhaust duct, and the accurate adjusting of temperature controlled system, the backhaul district of chain after stretching lowered the temperature rapidly, and remain in the constant preparation temperature, temperature difference fluctuation is minimum, thus directly avoided chain when entering drawing zone by the backhaul district to the influence of clamping sheet stretching film forming, guaranteed good production status and stable product quality.
In the bi-directional synchronization drawing process, stretch longitudinally is that prolongation by chain chain folder fore-and-aft distance realizes, that is to say, (before stretching) chain chain folder is adjacent when preheating, and distance was elongated gradually between the chain chain pressed from both sides when longitudinal stretching, finally reach desired stretching distance, be implemented in the longitudinal stretching that the chain chain presss from both sides folded sheet with this.At this moment, particularly strict to the temperature difference requirement of the adjacent chain before stretching, if each chain each other temperature have big difference, return and cause stretching inhomogeneous, difficulty perhaps stretches.Chain constant temperature system of the present invention makes each chain through identical constant temperature passage cooling and maintenance constant temperature, and therefore the appearance of having avoided crossing cold or overheated situation is specially adapted to the bi-directional synchronization drawing process.
Simultaneously, the chain of long-term circular flow has been avoided helping to prolong the service life of chain because of the lubricated and parts of temperature overheating to the chain rotating part after the processing of chain constant temperature system of the present invention, helps reducing production costs.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the single layer structure schematic diagram of constant temperature passage of the present invention.
Fig. 3 is the three-decker schematic diagram of constant temperature passage of the present invention.
Fig. 4 is the structural representation of both sides of the present invention constant temperature passage.
Fig. 5 is second kind of structural representation of both sides of the present invention constant temperature passage.
Fig. 6 is the structural representation of the air intake pipe orifice of constant temperature passage of the present invention.
The specific embodiment
Embodiment one:
The chain constant temperature system of a kind of film synchro-draw machine of the present invention, as shown in Figure 1, comprise the chain 1 of cycle rotation, constant temperature passage 2 is set in the backhaul district of chain 1, constant temperature passage 2 is provided with blast pipe 3 and exhaust duct 4, and the mouth of pipe is respectively equipped with pressure fan 5 and exhaust blower 6; Drawing zone at chain 1 is provided with temperature measuring equipment 7, is being connected controller 8 between temperature measuring equipment 7 and the pressure fan 5.
Described temperature measuring equipment 7 can be installed in the optional position of the drawing zone of chain 1, and as shown in Figure 1, temperature measuring equipment 7 is installed in the original position of the drawing zone of chain 1.The chain folder of this original position is convenient to continuous temperature measurement than comparatively dense.
The first-selection of described temperature measuring equipment 7 is the Non-contact Infrared Temperature Measurement device.
Operation principle: 7 pairs of moving chains 1 of not stall in film synchro-draw machine of temperature measuring equipment, especially, implement the continuous uninterrupted temperature survey to the chain 1 in backhaul district.Then measurement feedback is given controller 8, controller 8 is exported to the driver of pressure fan 5 with control signal after PID (PID) computing, and control pressure fan 5 rotating speeds are realized the automatic control to cooling air quantity.With this amount of cooling water, realize the purpose of control chain temperature by the control chain.
Embodiment two:
Embodiment three:
Embodiment four:
Being provided with of blast pipe 3 described in the embodiment one and exhaust duct 4 made further optimal design, and as shown in Figure 4, blast pipe 3 is located at the interlude of constant temperature passage 2, and described exhaust duct 4 is located at the two ends of constant temperature passage 2.
The present invention is cold by force in the middle of adopting, the mode of the two-way cooling of two ends forced-ventilated designs the constant temperature passage.As shown in Figure 4, in the time of can solving unidirectional blowing cooling, chain single face good cooling results, back side cooling is not good, and causes the even problem of chain inhomogeneous cooling, thereby guarantee chain can be efficiently, cooling equably.
Embodiment five:
On the basis of embodiment four, as shown in Figure 5, the wall scroll insulation passage 2 in the present embodiment also can adopt two blast pipes 3 to be blown into cooling air, the design of four exhaust duct semi-finals air drafts.
Embodiment six:
The mouth of pipe to the blast pipe 3 described in the embodiment one is made further optimal design, and as shown in Figure 6, the mouth of pipe of described blast pipe 3 is equipped with heat exchanger 10.
Heat exchanger 10 the place aheads are provided with temperature probe 11, are being connected controller 13 between temperature probe 11 and the cooling water control valve 12.
The first-selection of temperature probe 11 is the Non-contact Infrared Temperature Measurement probe.
Operation principle: heat exchanger 10 feeds 10 ℃ cooling water A as cooling agent.After natural wind B passes through heat exchanger 10, the temperature that temperature probe 11 is measured through cooled cooling air C, the measured value via controller 13 of temperature, adopt the flow of pid control mode control cooling water A, just control amount of cooling water, thereby the amount of cooling water of control natural wind B when over-heat-exchanger 10 reaches the purpose of controlling cooling air C temperature.
Claims (9)
1, a kind of chain constant temperature system of film synchro-draw machine, the chain (1) that comprises cycle rotation, it is characterized in that: constant temperature passage (2) is set in the backhaul district of chain (1), constant temperature passage (2) is provided with blast pipe (3) and exhaust duct (4), and the mouth of pipe is respectively equipped with pressure fan (5) and exhaust blower (6); Drawing zone at chain (1) is provided with temperature measuring equipment (7), is being connected controller (8) between temperature measuring equipment (7) and the pressure fan (5).
2, the chain constant temperature system of film synchro-draw machine according to claim 1 is characterized in that: described constant temperature passage (2) is wrapped in heat-insulation layer (9).
3, the chain constant temperature system of film synchro-draw machine according to claim 2, it is characterized in that: described heat-insulation layer (9) is three layers, internal layer is high-temperature-resistant thermal-insulation material (9a), and the intermediate layer is the air layer (9b) of sealing, and skin is high-temperature-resistant thermal-insulation material (9c).
4, the chain constant temperature system of film synchro-draw machine according to claim 1 is characterized in that: described temperature measuring equipment (7) is installed in the original position of the drawing zone of chain (1).
5, according to the chain constant temperature system of claim 1 or 4 described film synchro-draw machines, it is characterized in that: described temperature measuring equipment (7) is the Non-contact Infrared Temperature Measurement device.
6, the chain constant temperature system of film synchro-draw machine according to claim 1 is characterized in that: described blast pipe (3) is located at the interlude of constant temperature passage (2), and described exhaust duct (4) is located at the two ends of constant temperature passage (2).
7, according to the chain constant temperature system of claim 1 or 6 described film synchro-draw machines, it is characterized in that: the mouth of pipe of described blast pipe (3) is equipped with heat exchanger (10).
8, the chain constant temperature system of film synchro-draw machine according to claim 7 is characterized in that: described heat exchanger (10) the place ahead is provided with temperature probe (11), is being connected controller (13) between temperature probe (11) and the cooling water control valve (12).
9, the chain constant temperature system of film synchro-draw machine according to claim 8 is characterized in that: described temperature probe (11) is the Non-contact Infrared Temperature Measurement probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031401015A CN100420567C (en) | 2003-08-07 | 2003-08-07 | Chain temperature maintaining system for synchronous film stretcher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031401015A CN100420567C (en) | 2003-08-07 | 2003-08-07 | Chain temperature maintaining system for synchronous film stretcher |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1486838A true CN1486838A (en) | 2004-04-07 |
| CN100420567C CN100420567C (en) | 2008-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031401015A Expired - Fee Related CN100420567C (en) | 2003-08-07 | 2003-08-07 | Chain temperature maintaining system for synchronous film stretcher |
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| Country | Link |
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| CN (1) | CN100420567C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105269805A (en) * | 2014-06-19 | 2016-01-27 | 上海紫东薄膜材料股份有限公司 | Biaxially oriented film production line transverse stretch section chain clip cooling system |
| CN114684530A (en) * | 2022-03-30 | 2022-07-01 | 东莞市新超越智能科技有限公司 | Transmission guide rail device for electronic welding device with long service life and low cost |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5429785A (en) * | 1994-03-01 | 1995-07-04 | E. I. Du Pont De Nemours And Company | Method of making biaxially oriented thermoplastic films |
| DE19651515C1 (en) * | 1996-12-11 | 1998-04-23 | Brueckner Maschbau | Heating or tempering plastic sheeting for stretching processes |
| US5753172A (en) * | 1996-12-11 | 1998-05-19 | E. I. Du Pont De Nemours And Company | Film bead heating for simultaneous stretching |
| DE69930193T2 (en) * | 1998-12-14 | 2006-07-27 | Toray Industries, Inc. | Method and device for producing plastic films |
-
2003
- 2003-08-07 CN CNB031401015A patent/CN100420567C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105269805A (en) * | 2014-06-19 | 2016-01-27 | 上海紫东薄膜材料股份有限公司 | Biaxially oriented film production line transverse stretch section chain clip cooling system |
| CN114684530A (en) * | 2022-03-30 | 2022-07-01 | 东莞市新超越智能科技有限公司 | Transmission guide rail device for electronic welding device with long service life and low cost |
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| Publication number | Publication date |
|---|---|
| CN100420567C (en) | 2008-09-24 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: FOSHAN JINHUI HIGH-TECH OPTOELECTRONIC MATERIAL Co.,Ltd. Assignor: Foshan Plastics Group Co.,Ltd. Contract record no.: 2010440000493 Denomination of invention: Chain temperature maintaining system for synchronous film stretcher Granted publication date: 20080924 License type: Exclusive License Open date: 20040407 Record date: 20100517 |
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| C56 | Change in the name or address of the patentee |
Owner name: FOSHAN FSPG HI-TECH. SHARES CO., LTD. Free format text: FORMER NAME: FOSHAN PLASTIC GROUP CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 528000 No. 82 middle Fenjiang Road, Guangdong, Foshan Patentee after: FSPG HI-TECH Co.,Ltd. Address before: 528000 No. 82 middle Fenjiang Road, Guangdong, Foshan Patentee before: Foshan Plastics Group Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080924 Termination date: 20210807 |