CN102166819A - Film-thickness precise control device of film blowing machine - Google Patents

Film-thickness precise control device of film blowing machine Download PDF

Info

Publication number
CN102166819A
CN102166819A CN2011100246652A CN201110024665A CN102166819A CN 102166819 A CN102166819 A CN 102166819A CN 2011100246652 A CN2011100246652 A CN 2011100246652A CN 201110024665 A CN201110024665 A CN 201110024665A CN 102166819 A CN102166819 A CN 102166819A
Authority
CN
China
Prior art keywords
film
control device
thermal treatment
treatment zone
die lip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2011100246652A
Other languages
Chinese (zh)
Inventor
程联芳
刘子明
文国强
王光华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HUBEI HENGTAI RUBBER CO Ltd
Original Assignee
HUBEI HENGTAI RUBBER CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HUBEI HENGTAI RUBBER CO Ltd filed Critical HUBEI HENGTAI RUBBER CO Ltd
Priority to CN2011100246652A priority Critical patent/CN102166819A/en
Publication of CN102166819A publication Critical patent/CN102166819A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

The invention relates to a control device of a film blowing machine, in particular to a film-thickness precise control device of a film blowing machine, which comprises a die head. The film-thickness precise control device is characterized in that the outer edge of an outer die lip of the die head is uniformly provided with at least eight heating regions, the heating regions are internally provided with heating rods and thermocouples and are isolated through insulated tanks, and arc lengths of the heating regions at the gaps of the die lip are less than 24mm. The invention can be used for controlling the temperature difference of adjacent heating regions to reach +/-10 DEG C, thereby realizing large change of material flowability, ensuring that the extruded film has more uniform thickness and greatly improving the quality of films.

Description

Inflation film manufacturing machine thickness accurate control device
Technical field:
The present invention relates to a kind of inflation film manufacturing machine control device, specifically a kind of inflation film manufacturing machine thickness accurate control device.
Technical background:
Inflation film manufacturing machine is the equipment that generally uses in the plastic sheeting processing industry.Adopting the inflation method form film is a quite complicated process, and process conditions have a significant impact film performance, particularly film gauge uniformity.Therefore the film precision is evenly extruded and is become an important development trend just day by day, and the die lip position that plastic sheeting is extruded then is to realize accurate key position and the precondition of extruding.
In die head device, plastic raw materials is in molten condition under the high temperature heating, studies show that along with the rising of temperature, the viscosity of plastic melt is the exponential function mode and descends.This be because, temperature raises, and must make that the motion between intermolecular, strand is accelerated, thereby make the winding between the plastic molecules chain reduce, the distance between the molecule increases, thereby causes viscosity to reduce.At present in the inflation method film production, film gauge uniformity is regulated generally two kinds of methods, a kind of is to solve by manually or automatically regulating the die lip gap length, as utility model patent: a kind of plastic film blowing machine die head exit gap self-checking device (patent No. ZL200820045584.4), changing the die lip gap length by principle of expanding with heat and contracting with cold exactly reaches, the method shortcoming is that regulating effect is poor, cycle, long waste product was many, and must embed the copper alloy thermo-sensitive material in the die lip, chemical reaction at high temperature takes place with plastic melt and generates the charcoal dirt in this material easily, thereby cause gap, die lip place to change, the time is once the long regulating effect that loses.Another kind method is to adopt automatic vane, regulate by the air quantity or the temperature that change each position of vane, the method shortcoming is that automatic vane involves great expense and accessory damages easily, and the regular maintenance expense is high, and vane does not almost have regulating effect to the downward-blowing water-cooling blown film automatically in addition.In view of this, controlling die lip megadyne temperature degree by precision is optimal selection, as utility model patent: a kind of plastic film blowing machine die head exit automatic temperature control device (patent No. ZL200820045586.3), exactly by changing the device that the temperature realization is evenly extruded, but this device weak point is: each die lip discharging opening temperature does not have separate opening, can't realize the big temperature difference in the control procedure, thereby can't realize causing the film gauge uniformity regulating effect not good to the bigger change of material fluidity.
Summary of the invention:
Purpose of the present invention is exactly at the deficiencies in the prior art, a kind of inflation film manufacturing machine thickness accurate control device is provided, it can control each contiguous thermal treatment zone temperature difference and reach ± and 10 ℃, thereby realize the bigger change of material fluidity, make the film thickness of extruding more even, thereby improved the quality of product greatly.
Technical scheme of the present invention is achieved in that it comprises die head, is characterized in that: the die lip outer rim evenly is provided with the thermal treatment zone outside die head, and heating rod and thermocouple are installed in the thermal treatment zone, isolates by heat dam between each thermal treatment zone.The described thermal treatment zone is no less than 8, and each thermal treatment zone in die lip gap location arc length less than 24mm.
The present invention adopts one group along the close independent heating rod of arranging of external mold lockjaw, these heating rods can be made a response to film thickness information, when finding in the film of extruding than thick regional of target, begin to heat up with the corresponding heating rod of die lip, make die lip corresponding site temperature raise this die lip place, zone plastic melt reduced viscosity.In contrast, when finding than thin regional of target in the film of extruding, quit work with the corresponding heating rod of die lip, make die lip corresponding site temperature reduce, this zone die lip plastic melt bulk viscosity becomes big.
Compared with prior art, control device of the present invention has following characteristics:
1, quicker response.Heating rod by the alloyed copper manufacturing has improved heat conductivility, makes that the response speed of system is faster, has improved the sensitiveness to downstream membrane thickness information feedback.
2, the bigger temperature difference is controlled.Around the outer die lip outer rim of die head some independent thermals treatment zone being set evenly, processing heat dam between each thermal treatment zone, have heat insulating function, reduce influencing each other of contiguous Heating Zone Temperature, each contiguous thermal treatment zone temperature difference can reach ± and 10 ℃.
3, simpler maintenance.The heating system of this heating rod and die head is separated from each other, and heating rod can be disassembled from die lip at any time and safeguard that regular maintenance is very convenient and expense is extremely low.
4, arrange more closely.In order to reach the control of better thickness evenness, the independent thermal treatment zone in die lip gap location arc length less than 24mm.
Description of drawings:
Fig. 1 is a die head schematic diagram of the present invention.
Fig. 2 is that the A-A of Fig. 1 is to structural representation.
The specific embodiment:
Below in conjunction with accompanying drawing the present invention is described further:
As shown in Figure 1 and Figure 2, the present invention includes die head 4, evenly be provided with the thermal treatment zone 6, heating rod 1 and thermocouple 3 are installed in the thermal treatment zone 6, isolate by heat dam 2 between each thermal treatment zone in outer die lip 5 outer rims of die head 4.The described thermal treatment zone 6 is no less than 8, and each thermal treatment zone in die lip gap location arc length less than 24mm.
Table 1 specific embodiment of the invention
Figure BDA0000044917780000031

Claims (2)

1. inflation film manufacturing machine thickness accurate control device, it comprises die head, it is characterized in that: the die lip outer rim evenly is provided with the thermal treatment zone outside die head, and heating rod and thermocouple are installed in the thermal treatment zone, isolates by heat dam between each thermal treatment zone.
2. inflation film manufacturing machine thickness accurate control device according to claim 1 is characterized in that: the described thermal treatment zone is no less than 8, and each thermal treatment zone in die lip gap location arc length less than 24mm.
CN2011100246652A 2011-01-24 2011-01-24 Film-thickness precise control device of film blowing machine Pending CN102166819A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011100246652A CN102166819A (en) 2011-01-24 2011-01-24 Film-thickness precise control device of film blowing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011100246652A CN102166819A (en) 2011-01-24 2011-01-24 Film-thickness precise control device of film blowing machine

Publications (1)

Publication Number Publication Date
CN102166819A true CN102166819A (en) 2011-08-31

Family

ID=44488231

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011100246652A Pending CN102166819A (en) 2011-01-24 2011-01-24 Film-thickness precise control device of film blowing machine

Country Status (1)

Country Link
CN (1) CN102166819A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5116554A (en) * 1989-10-17 1992-05-26 Tomi Machinery Manufacturing Co. Ltd. Method of making a film having uniform thickness
JPH05237918A (en) * 1991-12-12 1993-09-17 Windmoeller & Hoelscher Blowing head
CN201195393Y (en) * 2008-03-28 2009-02-18 马镇鑫 Automatic temperature control apparatus for mould discharge door of plastic film blowing machine
CN201195391Y (en) * 2008-03-28 2009-02-18 马镇鑫 Automatic temperature control vane of plastic film blowing machine
CN202037868U (en) * 2011-01-24 2011-11-16 湖北恒泰橡塑有限公司 Precision control device for film thickness of film blowing machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5116554A (en) * 1989-10-17 1992-05-26 Tomi Machinery Manufacturing Co. Ltd. Method of making a film having uniform thickness
JPH05237918A (en) * 1991-12-12 1993-09-17 Windmoeller & Hoelscher Blowing head
CN201195393Y (en) * 2008-03-28 2009-02-18 马镇鑫 Automatic temperature control apparatus for mould discharge door of plastic film blowing machine
CN201195391Y (en) * 2008-03-28 2009-02-18 马镇鑫 Automatic temperature control vane of plastic film blowing machine
CN202037868U (en) * 2011-01-24 2011-11-16 湖北恒泰橡塑有限公司 Precision control device for film thickness of film blowing machine

Similar Documents

Publication Publication Date Title
CN104441536B (en) Polyether-ether-ketone capillary extrusion production technology and equipment
JP2013126946A5 (en)
CN202430110U (en) Device for controlling forming temperature field of plate glass
CN202037868U (en) Precision control device for film thickness of film blowing machine
WO2009041308A1 (en) Process for producing thermoplastic resin film
CN103889682B (en) The temperature-controlled process of the thermoplastic resin in injection moulding machine
EP1780314A3 (en) Method for manufacturing silicon single crystal
CN102166819A (en) Film-thickness precise control device of film blowing machine
CN102909229A (en) Forming process of 7003 aluminum alloy sections
US20100219558A1 (en) Melt extruder and process for producing thermoplastic resin film
CN104723581A (en) Preparation method of fluorine layer-containing polyimide composite material and equipment for method
CN105154806A (en) Method and device for accurately controlling evenness of pre-hot-dip-coating temperature of steel band
CN105128370A (en) Preparation method of high-flexibility BOPP (Biaxially-oriented Polypropylene) film
CN201997688U (en) Runner structure for kirsite pressure casing mould
CN111230085B (en) Variable gap type ladle system for aluminum alloy/magnesium alloy and preparation method
CN103726024A (en) Production method of gold target material for sputter coating
CN106345811A (en) Method for manufacturing brass rod wire
CN204622537U (en) A kind ofly exempt from high temperature PE pipe extruder with high accuracy blanking device
NO20074468L (en) Method and apparatus for making a rudder
CN203281831U (en) Crystallizing wheel wall temperature adjustment device
CN103212680A (en) Crystallization wheel wall temperature regulating device
CN103144266B (en) Raw material forming system device
CN104496153B (en) Device and method for preventing crystallization at leakage hole
CN110948811A (en) Polymer crystallization on-line measuring device
CN108621353A (en) Photovoltaic encapsulation glued membrane preparation facilities

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C12 Rejection of a patent application after its publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20110831