CN206140854U - A charging system for producing PET stretch film - Google Patents
A charging system for producing PET stretch film Download PDFInfo
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- CN206140854U CN206140854U CN201621228808.6U CN201621228808U CN206140854U CN 206140854 U CN206140854 U CN 206140854U CN 201621228808 U CN201621228808 U CN 201621228808U CN 206140854 U CN206140854 U CN 206140854U
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- hopper
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- temperature control
- blast heating
- pet
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Abstract
The utility model discloses a charging system for producing PET stretch film, this system adopt vertical mounting means, from the top down establish ties in proper order be provided with that hot -blast heating control by temperature change hopper, vector are called, loading head, metal separator, extruder hopper and double screw extruder, hot -blast heating control by temperature change hopper includes the control box. The utility model discloses make the PET section by hot air blowing, drying in the hopper, get rid of PET section surface moisture, make its water content fall to below the 2000ppm to the processing smooth and steady quality of optimal design, assurance PET film is carried out double screw extruder.
Description
Technical field
This utility model is related to PET oriented film charging system technical fields, and in particular to one kind is stretched for producing PET
The charging system of thin film.
Background technology
Polyester PET melt is very sensitive to water, and high temperature is easily hydrolyzed when extruding, in single screw extrusion machine of the tradition without aerofluxuss
On production line, it is necessary to set up raw material drying system, the moisture that PET cuts into slices below 50ppm must be dropped to before extrusion.In recent years
It is next, to extrude the success in processing in PET with twin screw double-exhaust extruder and use, PET oriented films are added using this extrusion
The production line of work mode is more and more.Twin screw double-exhaust extruder used in production line, original raw material drying system is taken
Disappear, PET cuts into slices after weighed metering, plasticizing in double screw extruder, conveying are directly entered, in plasticizing process, by evacuation
Mode dehumidifies, aerofluxuss, it is to avoid hydrolysis occurs, and final molding is the PET products such as thin film.This mode, in many PET oriented films
Promising result is obtained in production line and other PET production of articles.
Because vacuum system of dual-screw extruder is comprehensive vacuum equipment extracting ability and PET stretching film production line totality
Design is required, its dehumidifying, exhaust capacity have certain limit.Its more satisfactory disposition is PET section water content
Less than 2000ppm.Though vacuum equipment pump-down process ability leaves certain design margin, but if PET section water content it is too high or
PET sections are long-term to keep compared with high-moisture percentage, and such as PET section water content is 3000-4000ppm..During actual production, can be because of vacuum
Dehumidifying effect not enough, causes certain hydrolysis problem in the PET courses of processing.Intuitively show as, PET viscosity drop in extrusion
Bigger than normal, the mechanical strength for processing film article is low.In addition, if PET sections moisture is higher always, extruder vacuum
System operation load will be increased, and long-term heavy-duty service is also easy to produce mechanical breakdown.
Possess on PET strands substantial amounts of ester be good for so as to stronger water absorption, its highest water absorption rate up to 0.6%,
PET cuts into slices in GB and related quality criterion, and moisture control level is required to as≤0.4%, i.e. 4000ppm.Therefore, PET
Moisture belongs to normal product more than 2000ppm in section, will not be used as quality matter.
In addition, PET cuts into slices in addition to the vacuum packaging of specialities, the jumbo bag shape of PE inner lining bags is generally individually added using plastic woven bag
Formula, sealing is adopted and manually ties up mode.In the case of wet environment or long storage time, section moisture absorption is to water content 2000ppm
More than it is easy to generation.This to twin screw double-exhaust extruder production PET oriented films bring larger hidden danger of quality and
Problem.
Utility model content
In order to overcome the problem described in background technology, this utility model is by PET stretching film production line charging systems
Online feed bin, is changed to Hot-blast Heating temperature control hopper, makes PET sections in hopper by hot-air blowing, drying, removes PET section tables
Face moisture so as to which water content drops to below 2000ppm, and design is optimized to double screw extruder, to ensure PET film
Processing smoothly and steady quality.
This utility model solves the technical scheme that its technical problem adopted：
A kind of charging system for producing PET oriented films, the system adopts vertically-mounted mode, system top to arrange
There are three Hot-blast Heating temperature control hoppers, three Hot-blast Heating temperature control hoppers are separately added into a group major ingredient（PET cuts into slices）, be open smooth mother
Grain and Masterbatch, three kinds of materials are entered in the system from three Hot-blast Heating temperature control hoppers, each Hot-blast Heating temperature control hopper
Bottom is provided with a vector and claims, and vector claims the material to entering in loading head to weigh, and controls inside each feed bin
Different materials enters into the amount ratio of loading head, it is ensured that plastic performance reaches formula design requirement so that product quality is equal
One；Each vector claims bottom to be connected to same loading head by pipeline, and loading head is used for caching in different feed bins
Material, loading head lower end is sequentially connected in series by pipeline and is provided with apparatus for separating metals, extruder hopper and double screw extruder, material
Extruded by double screw extruder；Metal detector and discharge gate are provided with apparatus for separating metals, when metal detector detects this
Contain metal in mixed material, discharge gate is automatically opened up discharges mixed material, discharge gate is automatically switched off afterwards, it is ensured that mixture
Metal in material is not entered in plastic product, improves the quality of product；Double screw extruder makes material with screw rod rotary motion
Linear motion is gradually become, to heading passage, and is engaged with fuselage, compression heat generation, softening stirring, mixed material.
Described Hot-blast Heating temperature control hopper includes cylinder, and cylinder upper end is provided with the bung matched with cylinder, bung
On be provided with aerofluxuss elbow and charging aperture, aerofluxuss elbow can discharge the gas in cylinder, need dry material from charging
Mouth is entered；Cylinder middle part is provided with regarding material window, convenient to cylinder by depending on expecting that window is observed that the concrete condition of inner barrel
Overhauled；Binder bucket in part under cylinder, hopper is internally provided with screen cloth, and screen cloth can reduce the decrease speed of material, protects
Exhibit material can be contacted fully with hot blast, and screen cloth can screen oarse-grained material, constantly to bulky grain thing
Material is dried, so as to reduce the diameter of large granular materials, it is ensured that material can be sufficiently mixed in an extruder；Lead on hopper side wall
Airduct connection Hot-blast Heating attemperating unit is crossed, airduct is internally provided with temperature control sensor and electric heating tube, Hot-blast Heating temperature control dress
Control temperature control sensor and electric heating tube are put, hot blast is supplied to inner barrel in real time.
Described hopper is disposed with focused radiation layer, extraordinary insulated thermal insulating layer, the outer metal of alloy from internal layer to outer layer
Shell and high temperature antiradiation coating；The focused radiation layer is arranged at the innermost layer of hopper, and this layer is mainly passed by way of radiation
Heat conduction amount；The extraordinary insulated thermal insulating layer is covered on the surface of focused radiation layer, and this layer is made using aerogel heat-insulating material,
This kind of material environment friendly, free from extraneous odour and any toxic and side effects；Using extraordinary insulated thermal insulating layer made by aerogel heat-insulating material, can be with
Effectively prevent heat from dissipating, improve the utilization rate of heat energy, it can make machine external skin temperatures be maintained at 30 DEG C -70 DEG C, ambient temperature
Compare more original 3 DEG C -8 DEG C of reduction；The alloy shell layer is layed on the surface of extraordinary insulated thermal insulating layer, and the layer is using highly dense
Degree welding, has good intensity to ensure, and can play and be effectively protected heat-blocking action；The high temperature antiradiation coating is coated in
On the surface of alloy shell layer, the coating can be coated on the surface of alloy shell layer by the method for dipping, spraying or spin coating,
Radiation can be effectively prevented, the loss of heat is reduced.
Described Hot-blast Heating attemperating unit includes control chamber, and control chamber is internally provided with blower fan control system, control chamber
Air inlet be provided with blower fan, control chamber air outlet connects hopper by airduct；Blower fan control system is the core control of control chamber
Element processed, blower fan control system real-time control blower fan, temperature control sensor and electric heating tube to inner barrel to supplying hot blast.
Described blower fan control system includes converter, and converter is provided with temperature control interface end, Boiler pressure control interface end, opens
Mobile interface end and signal output part；Described temperature control interface end connection temperature control sensor, described Boiler pressure control interface end connection
Air flow sensor, described startup interface end connecting valve, described signal output part connect many electric heating tubes and time after
Electrical equipment, the contact terminal of the described time relay is in series with blower fan.During work, electric heater for heating, time relay time delay
Electromechanical source of divulging information is followed by within 15 minutes, now blower fan makes steam be blown into inner barrel；Converter is according to temperature control sensor and wind
The live signal of quantity sensor transmission, the heating-up temperature of real-time adjustment electric heating tube and the size of blower fan intake, so not only
Can energy saving, and protect the safety of equipment.
Preferably, described double screw extruder includes machine barrel, and having heaters is arranged on machine barrel, and inside machine barrel is separated into
Two runners for independently running through, are mounted on two screw rods inside two runners, two screw rod one end connect deceleration distributor box, subtract
Fast distributor box input connects motor；Two runners are respectively arranged with independent segment, filling section and engaged section along fluid direction of motion,
Two screw rods of independent segment and filling section are non-engagement state, and two screw rods of independent segment and filling section each distinguish position
In the runner of two independent insertions of machine barrel, filling section is provided with charging point, and the discharging opening of charging point is located at the machine barrel of filling section
It is interior；Two screw rods in engaged section are located in the runner that machine barrel merges, and the end of engaged section is discharging opening.Independent segment and plus
Two screw rods of note section are each located in the runner of two independent insertions of machine barrel equivalent to two single single screw rods, and material melts
There is gap in body, single screw rod forms a closed space of melt in runner in single screw rod unlike in the twin screw,
The material that gas or supercritical foaming fluid have been filled in screw channel can preferably be sealed, but single screw extrusion machine
Scattered mixed performance it is poor, it is difficult to meet by supercritical fluid add after injecting material melt rapid dispersion mixing with dissolve into it is molten
Body.Engaged section is the two screw rods being meshed, and plays the role of to force to push forward material, meanwhile, also material is had and is preferably divided
Various materials can sufficiently be mixed by scattered immixture.
The utility model has the advantages that：
（1）This utility model arrange three feed bins fed, and arrange vector claim control each feed bin material enter
Enter the quality to loading head, it is ensured that the concordance of melt extrusion performance and the homogeneity of product property；
（2）This utility model arranges metal detector, and metal is contained in the mixed material is detected, and discharge gate is beaten automatically
Open and discharge mixed material, discharge gate is automatically switched off afterwards, it is ensured that the metal in mixed material is not entered in plastic product, is carried
The quality of high product；
（3）This utility model is due to being provided with converter, and the connection temperature sensor of converter temperature control interface end, frequency conversion
The Boiler pressure control interface end connection air flow sensor of device；Therefore converter can be transmitted according to temperature sensor and air flow sensor
Live signal, in good time the size of the heating-up temperature of adjustment electric heating tube and air output, has not only saved the energy and has more protected equipment
Safety；
（4）The time relay is connected between converter signal output part of the present utility model and blower fan, when switching on power,
Electric heating tube is first heated, and the time relay makes electric motor starting suspend a period of time, after air is heated in hot-air blower, restarts electricity
Machine makes steam be blown into cylinder, and its energy consumption is low, has saved the energy；
（5）Material can be heated to molten condition by the heater on the independent segment of double screw extruder of the present utility model,
Independent segment and filling section can be carried out preferably equivalent to two single single screw rods to the material of the molten condition in screw channel
Sealing, it is to avoid plus the loss of injection gas therein and supercritical fluid；Be provided with the machine barrel of filling section charging point be for
Convenience filling fluid；Engaged section has preferable dispersion mixing to act on to material, makes foamed product more easily reach wanting for design
Ask, reduce the defect rate of foamed product.
Description of the drawings
Fig. 1 is structure diagram of the present utility model；
Fig. 2 is the structural representation of Hot-blast Heating temperature control hopper of the present utility model；
Fig. 3 is blower fan control system circuit theory diagrams of the present utility model；
Fig. 4 is structural representation of the hopper of the present utility model from internal layer to outer layer.
Fig. 5 is front view of the double screw extruder of the present utility model along axis；
Fig. 6 is top view of the double screw extruder of the present utility model along axis.
Specific embodiment
This utility model is further described below in conjunction with accompanying drawing：
As shown in figure 1, a kind of charging system for producing PET oriented films, the system adopts vertically-mounted mode, is
System top is provided with three Hot-blast Heating temperature control hoppers 11, and material enters into the system from three Hot-blast Heating temperature control hoppers 11
In, each end of Hot-blast Heating temperature control hopper bottom 11 is provided with a vector and claims 12, and each vector claims 12 bottoms to connect by pipeline
Same loading head 13 is connected to, the lower end of loading head 13 is sequentially connected in series by pipeline and is provided with apparatus for separating metals 14, extruder hopper
15 and double screw extruder 16, material is extruded by double screw extruder 16.
As shown in Figures 2 and 3, process is dried in order to realize the material to inner barrel, while can pass according to temperature
Sensor and the live signal of air flow sensor transmission, in good time the size of the heating-up temperature of adjustment electric heating tube and air output, saves
The energy, protection equipment safety, described Hot-blast Heating temperature control hopper includes cylinder 21, and the upper end of cylinder 21 is provided with and the phase of cylinder 21
Supporting bung 22, is provided with aerofluxuss elbow 23 and charging aperture 24 on bung 22；The middle part of cylinder 21 is provided with regarding material window 25, cylinder
21 times part binder buckets 26, hopper 26 is internally provided with screen cloth 27, and Hot-blast Heating is connected by airduct 28 on the side wall of hopper 26
Attemperating unit, airduct 28 is internally provided with temperature control sensor 29 and electric heating tube 30；Described Hot-blast Heating attemperating unit includes
Control chamber 31, control chamber 31 is internally provided with blower fan control system, and the air inlet of control chamber 31 is provided with blower fan 32, control chamber 31
Air outlet connects hopper 26 by airduct 28；Described blower fan control system includes converter 33, and converter 33 is provided with temperature control
Interface end a and b, Boiler pressure control interface end c and d, startup interface end e and f and signal output part；Described temperature control interface end a and b
Connection temperature control sensor 34, described Boiler pressure control interface end c and d connection air flow sensors 35, described startup interface end e and
F connecting valves 36, described signal output part connects many electric heating tubes 30 and the time relay 38, the described time relay
38 contact terminal is in series with blower fan 32.
As shown in figure 4, the intensity in order to ensure hopper, and can play and be effectively protected heat-blocking action, can be effective
Radiation is prevented, the loss of heat is reduced, described hopper is disposed with focused radiation layer 41, extraordinary insulation from internal layer to outer layer
Thermal insulation layer 42, alloy outer metal housing 43 and high temperature antiradiation coating 44.
As shown in Figure 5 and Figure 6, in order to there is preferable dispersion mixing to act on to material, more easily reach foamed product and set
The requirement of meter, reduces the defect rate of foamed product, and described double screw extruder includes machine barrel 51, is provided with machine barrel 51 and adds
Hot device 58, is separated into two runners for independently running through inside machine barrel 51, be mounted on two screw rods 52 inside two runners, and two
The one end of individual screw rod 52 connection deceleration distributor box 53, the input of deceleration distributor box 53 connection motor 54；Two runners are along fluid motion
Direction is respectively arranged with two screw rods 52 of independent segment 55, filling section 56 and engaged section 57, independent segment 55 and filling section 56 and is
Non-engagement state, and two screw rods 52 of independent segment 55 and filling section 56 are each respectively positioned at 51 two independent insertions of machine barrel
In runner, filling section 56 is provided with charging point 59, and the discharging opening of charging point 59 is located in the machine barrel 51 of filling section 56；Engaged section 57
On two screw rods 52 be located at machine barrel 51 merge runner in, and the end of engaged section 57 be discharging opening.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate this utility model example,
And not to the restriction of embodiment.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms.There is no need to be exhaustive to all of embodiment.And thus
Among the obvious change amplified out or variation are still in protection domain of the present utility model.
Claims (2)
1. a kind of charging system for producing PET oriented films, it is characterised in that the system adopts vertically-mounted mode, is
System top is provided with three Hot-blast Heating temperature control hoppers, and material is entered in the system, often from three Hot-blast Heating temperature control hoppers
Individual Hot-blast Heating temperature control hopper bottom is provided with a vector and claims, and each vector claims bottom to be connected to same collection by pipeline
Glassware, loading head lower end is sequentially connected in series by pipeline and is provided with apparatus for separating metals, extruder hopper and double screw extruder, material
Extruded by double screw extruder；
Described Hot-blast Heating temperature control hopper includes cylinder, and cylinder upper end is provided with the bung matched with cylinder, sets on bung
It is equipped with aerofluxuss elbow and charging aperture；Cylinder middle part is provided with regarding material window, and binder bucket in part under cylinder, hopper is internally provided with sieve
Net, Hot-blast Heating attemperating unit is connected on hopper side wall by airduct, and airduct is internally provided with temperature control sensor and electric heating tube；
Described hopper be disposed with from internal layer to outer layer focused radiation layer, extraordinary insulated thermal insulating layer, alloy outer metal housing and
High temperature antiradiation coating；
Described Hot-blast Heating attemperating unit includes control chamber, control chamber is internally provided with blower fan control system, and control chamber enters
Air port is provided with blower fan, and control chamber air outlet connects hopper by airduct；
Described blower fan control system include converter, converter be provided with temperature control interface end, Boiler pressure control interface end, startup connect
Mouth end and signal output part；Described temperature control interface end connection temperature control sensor, described Boiler pressure control interface end connection air quantity
Sensor, described startup interface end connecting valve, described signal output part connects many electric heating tubes and the time relay,
The contact terminal of the described time relay is in series with blower fan.
2. a kind of charging system for producing PET oriented films as claimed in claim 1, it is characterised in that described is double
Screw extruder includes machine barrel, arranges having heaters on machine barrel, and inside machine barrel is separated into two runners for independently running through, two
Two screw rods are mounted on inside runner, two screw rod one end connect deceleration distributor box, deceleration distributor box input connection motor；
Two runners are respectively arranged with two spiral shells of independent segment, filling section and engaged section, independent segment and filling section along fluid direction of motion
Bar is non-engagement state, and two screw rods of independent segment and filling section each respectively positioned at the stream of two independent insertions of machine barrel
In road, filling section is provided with charging point, and the discharging opening of charging point is located in the machine barrel of filling section；Two screw rod positions in engaged section
In the runner that machine barrel merges, and the end of engaged section is discharging opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621228808.6U CN206140854U (en) | 2016-11-16 | 2016-11-16 | A charging system for producing PET stretch film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621228808.6U CN206140854U (en) | 2016-11-16 | 2016-11-16 | A charging system for producing PET stretch film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206140854U true CN206140854U (en) | 2017-05-03 |
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ID=58626818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621228808.6U Active CN206140854U (en) | 2016-11-16 | 2016-11-16 | A charging system for producing PET stretch film |
Country Status (1)
| Country | Link |
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| CN (1) | CN206140854U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107081891A (en) * | 2017-05-16 | 2017-08-22 | 镇江宝塑高分子材料有限公司 | A kind of 90 DEG C of thermoplastic low-smoke halide-free material preparation single screw extrusion machines |
-
2016
- 2016-11-16 CN CN201621228808.6U patent/CN206140854U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107081891A (en) * | 2017-05-16 | 2017-08-22 | 镇江宝塑高分子材料有限公司 | A kind of 90 DEG C of thermoplastic low-smoke halide-free material preparation single screw extrusion machines |
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