CN201577515U

CN201577515U - Gravity coating control system

Info

Publication number: CN201577515U
Application number: CN200920076063XU
Authority: CN
Inventors: 刘�英
Original assignee: Shanghai Yichen Information Technology Development Co Ltd
Current assignee: Shanghai Yichen Information Technology Development Co Ltd
Priority date: 2009-06-10
Filing date: 2009-06-10
Publication date: 2010-09-15
Anticipated expiration: 2019-06-10

Abstract

The utility model provides a gravity coating control system which is applied to a grain shaping processing device which comprises a feed device (20), a screw rod extruder (10), an extrusion die (40), a cutting device (30), a rotary motor box (50), a coating system (60), a coating control module (600) and a conveyer belt (70) in turn, wherein the coating system (60) is a vertical liquid film coating device, and comprises an upper oil storage box (61), a lower oil storage tank (62), an oil pump (69), an oil conveying pipeline (68) and an oil tank sensor module (601), wherein a hollow coating frame (64) is arranged in the middle of the coating device, a liquid film is formed by liquid current (67) formed by a plurality of closely arrayed oil spray holes (66) on the top of the coating frame (64) so as to coat the surfaces of materials which pass through the coating frame (64), thereby improving the repeat utilization ratio of coating grease, optimizing coating technology, and reducing waste.

Description

Gravity coating control system

Technical field

The utility model relates to a kind of gravity coating control system, relate to particularly adopt screw extruder and supporting extrude, a kind of concrete coating oil equipment and control system thereof in the blended grain processing method of excision forming, application system.

Background technology

Along with increase day by day to the requirement of the nutrition of food, the bread basket and the production method thereof of various composite nutrients are also developing by leaps and bounds, from the pre-steaming method technology of early stage acid, directly soak technologies such as suction method and coating method, develop into nowadays more complete:, obtain the technological process of multi-nutrient fortification composite cereal at last from cereal pulverizing → preliminary treatment → mix with nutrient → push → excision forming → drying → screening → join rice in proportion.

And the step of extruding-excision forming wherein is the important step in the production process, single screw rod or the twin (double) screw extruder generally taked, the hydrate of cereal powder is pushed the back by certain shape mould, obtain the cereals of needed shape, size through cutting, and on corresponding conveyer belt, carry, until check and packaging step.

Simultaneously, because the techniqueflow of extrusion modling process can be processed into cereal the product with certain puffed degree and mellowness, be applicable to products such as various food, nourishing additive agent, animal feed.

Referring to accompanying drawing 1, international open text (WO01/72151) discloses a kind of incorporate composite cereal mixing, extruding, former.Comprise raw material blending device, twin (double) screw extruder, extrusion device, excision forming equipment.Raw material blending device wherein and twin (double) screw extruder link to each other by the vertical transport pipeline that is communicated with, and be provided with control valve in pipelines, to adjust speed and the product efficiency that the premix raw material enters extruder.Be arranged in parallel in the twin (double) screw extruder screw rod of two mutual interlocks of screw thread rotates in opposite directions, makes the material of from top to bottom carrying can carry out compacting fully and conveying.End at extruder has extrusion dish, offer a plurality of extrusion cavities on the extrusion dish, be close to the extrusion cavities place and be provided with cutter sweep, the strip-shaped materials that squeezes out can be cut into needed strip, granular or sheet products, to meet the needs of various cereal joint products.

Referring to accompanying drawing 2, United States Patent (USP) (US5350585) discloses a kind of double-screw structure of extruder.Described double-screw structure is divided into multistage, and its thread density is all inconsistent, to cooperate the needs in each stage in the extrusion process.Simultaneously, also offer the cavity in the screw rod, so that material fully mixes in screw extruder.

Yet traditional screw rod extruding excision forming machine still has some shortcomings:

1, the product that obtains of traditional extruding cutting equipment directly carries out the heating, drying step, yet but tends in baking step and since the product that contains moisture suddenly dehydration cause product surface to break or pulverize, cause the yield rate reduction.

2, the output of traditional extrusion formation equipment and productive rate are difficult to be greatly improved.

3, there are a large amount of wastes and the low shortcoming of coating grease utilization rate in traditional painting method.

The utility model content

The utility model provides a kind of gravity coating control system, be applied to comprise successively feed arrangement (20), screw extruder (10), extrusion die (40), cutter sweep (30), rotary motor case (50), application system (60) applies control module (600), and the cereal contour machining equipment of conveyer belt (70), wherein, described application system (60) is vertical liquid film coating unit, comprises upper strata fuel reserve tank (61), lower floor's fuel reserve tank (62), oil pump (69) and pipeline road (68), tank sensor module (601);

In the middle of the described coating unit be the coated frame (64) of hollow, and the liquid that is formed by a plurality of compact arranged jet (66) at coated frame (64) top flows (67) formation liquid film, and the material surface by is wherein applied.

Above-mentioned gravity coating control system, wherein, described tank sensor module (601) comprises liquid level sensor and oil pressure sensor.

Above-mentioned gravity coating control system, wherein, the coated frame top has oil storage tank (65), in order to store and to distribute the oil in storage of each jet (66).

Above-mentioned gravity coating control system, wherein, described oil storage tank (65) top is provided with a plurality of throttling funnels (63), and inside is provided with choke valve; Described coating control module (600) respectively with tank sensor module (601), choke valve in oil pump (69) and the throttling funnel (63) connects.

Above-mentioned gravity coating control system, wherein, the bore of described jet (66) is 1.5 millimeters to the maximum, and the spacing of described adjacent jet is the 2-5 millimeter, to form the coating liquid stream (67) near complete liquid film.

Above-mentioned gravity coating control system, wherein, the coated frame (64) of described coating unit (60) is set to be wrapped in conveyer belt (70) outside, and described conveyer belt (70) is provided with the device that is used to collect reuse oil at the front and back position through coating unit.

Above-mentioned gravity coating control system wherein, has an internal layer cavity in the cavity of described screw extruder (10), with the whole combination of internal screw; The shape of internal layer cavity is close to the edge setting of screw-rod structure; Internal layer cavity (6) is outer also to be provided with an outer cavity (7), is sealed with double-screw structure in the described internal layer cavity, and is supported between the outer cavity (7).

The method of above-mentioned gravity coating control system, wherein, when control module (600) is received the numbered signal of oil plant storage capacity that liquid level sensor sends, oil pump (69) is opened in control, oil plant stored in lower floor's fuel reserve tank (62) is extracted to upper strata fuel reserve tank (61) the circulation utilization.

The method of above-mentioned gravity coating control system, wherein, when oil pressure sensor sent the empty signal of lower floor's fuel reserve tank, oil pump (69) was closed in control module (600) control, stops to pump.

The method of above-mentioned gravity coating control system wherein, is characterized in that, when oil pressure sensor sent the saturated signal of oil mass, control module (600) was directly controlled the inner choke valve of throttling funnel (63) and closed.

By the technical scheme that the utility model adopted, can obtain following advantage:

1, by being applied grease, extruding cutting back product (mainly refers to all kinds of edible oil and fat, especially refer to soybean oil, olive wet goods vegetable oil), so that it can obtain the better overall form before oven dry, and can effectively prevent in the predrying process because moment the high temperature cracking and the fragmentation that cause.

2, improve extruding efficient and utilization of space, can under the situation that does not enlarge the hold facility area, effectively increase the maximum output of separate unit extrusion equipment.

3, improved the recycling rate of waterused that applies grease, can optimize coating processes, and cut the waste.

Description of drawings

The extruder of Fig. 1 prior art;

The double-screw structure of Fig. 2 prior art;

The horizontal view of Fig. 3 the utility model extrusion formation equipment;

The vertical view of Fig. 4 the utility model extrusion formation equipment;

Fig. 5 screw extruder sectional view of the present utility model;

Of the present utility model pair of extruder omnidirectional distribution of Fig. 6 figure;

Fig. 7 extrusion formation equipment extruding screw of the present utility model temperature regulating device and single screw rod distribution map;

Fig. 8 application system front view of the present utility model;

The lateral plan of Fig. 9 application system of the present utility model;

The schematic diagram of Figure 10 application system of the present utility model and transfer system;

Figure 11 coating control system module of the present utility model connection diagram.

The specific embodiment

Referring to accompanying drawing 3 and accompanying drawing 4, be the vertical view of applied extrusion formation equipment horizontal flow chart of the utility model and equipment.Comprise feed arrangement (20), screw extruder (10), extrusion die (40), cutter sweep (30), rotary motor case (50), wherein, described feed arrangement (20) is for having the loading hopper of flow control valve and monitoring device; Described screw extruder (10) comprises the cavity that screw rod is installed, supporting strut, and with many screw rods of the mutual airtight interlock of inside cavity; Described extrusion die (40) has two extrusion dishes (41), and extrusion dish is the frustum shape, and extrusion is distributed on the outer ring surface of disk; Described cutter sweep (30), comprise cutter blade (32), cutter rotating shaft (32), the knife face of pressing close to extrusion dish (41) surface of described cutter blade (32) is plane or inclined-plane, the cut surface that is directly used in cutting is parallel to described extrusion dish (41) surface and is provided with.Material enters screw extruder (10) by feed arrangement (20), there are twin-screw or multiscrew structure to carry out the extruding and the conveying of level in the screw extruder, and described material finally is accumulated to an end of close extrusion die (40), by the screw rod rotation process that continues, material is pushed into extrusion die, and via the extrusion cavities in the mould, described extrusion cavities is distributed on the circular extrusion dish (41), and material is extruded thus.Described cutter sweep (30), by a cutter rotating shaft (31), be connected by turning cylinder (51) with the rotary motor case (50) of outside, the axial transmission of the turning cylinder by motor makes cutter rotating shaft (31) drive cutter blades (32) and rotates with certain speed.Speed governing according to motor, with the controllable rotation speed scope of described cutter be: between the 15RPM to 600RPM, in extruding, cutting and forming integrated equipment of the present utility model, the preferred rotating speed that is applicable to product is: 80-280RPM, the wherein normal rotating speed that uses is respectively: 110RPM, 150RPM, 180RPM and 220RPM.

Extrusion die (40) equipment has two extrusion dishes (41), and extrusion dish is the frustum shape, and less at a side bore of extrusion die, and bigger at the side bore away from extrusion die.And be distributed with extrusion (42) on the extrusion dish, extrusion is distributed on the outer ring surface of disk.The preferred extrusion cavities arrangement of the utility model, extruding on the disk (41) as shown in Figure 3,3 one group arrangement of extrusion, and 3 extrusions of every group are arranged along the disk tangential direction.Can press certain angle with respect to disk and distribute,, be divided into and join 4 groups as 90 ° of angles.Perhaps also can take 120 ° of angles to distribute 3 groups or 60 ° of angles to distribute other equal mode for cloth such as 6 groups.The diameter of extrusion dish (41) is typically chosen between 15 to 65 centimetres, is preferably 15 centimetres of extrusion dishes to 30 cm diameters.The diameter of extrusion (42) is controlled to be between 1 millimeter to 15 millimeters, and the extrusion dish that can select to have different diameter extrusion cavities according to different product requirements as an alternative.The bore dia that wherein is preferred for making the extrusion of production reconstituted rice kernels equipment is 1.2 millimeters or 3.8 millimeters, so that the finished product final size can be near natural rice.The shape of described extrusion also can adopt other shapes such as square, rectangle, ellipse.

In the cutter sweep in the applied pressurizing unit of the utility model, cutter blade (32) is fixed in the cutter rotating shaft (31) by axle sleeve, axially drives by rotary motor by cutter rotating shaft (31), drives cutter blades (32) and rotates.The blade of cutter (32) length is slightly larger than the radius of adjacent extrusion dish, blade exceeds the length of extrusion dish between 2-5cm, described cutter sweep (30) also has an outer cover, to coat whole cutter blade, have and the corresponding square breach of conveyer belt that is positioned under the extrusion dish mouth in its underpart, preventing that material from dispersing or sputter in cutting process, and can make it enter conveyer belt.Described blade has 4, and is arc along the blade of its rotation direction (clockwise); Be used for directly cutting the material place on the described blade and have a cut surface, described cut surface is parallel to the extrusion dish plane.Blade can be set to full wafer and entirely presses close to extrusion dish in addition; Perhaps blade integral and extrusion dish plane tilt, but in the position near the cut surface place, have one section with extrusion dish near parallel transition face, its actual and extrusion dish has the angle of inclination of 0-15 degree.The cut surface and the distance between the extrusion dish of described cutter are: the 1-15 millimeter is preferably the 2-7 millimeter.

Referring to Fig. 5, for the utility model the cross sectional view of preferred screw extruder, have an internal layer cavity (6) in the cavity of described screw extruder (10), the whole combination of same internal screw (1,2,3), also comprise a charging notch (5), be used to allow the premix raw material enter extrusion equipment; The shape of internal layer cavity (6) is close to the edge setting of screw-rod structure; Internal layer cavity (6) is outer also to be provided with an outer cavity (7), is sealed with the three-screw-rod structure that three screw rods are formed in the described internal layer cavity, and is supported between the outer cavity (7).And three screw rods divide upper strata screw rod group (1,2) and two-layer the arranging of lower floor's screw rod (3).Wherein, the upper strata screw rod group comprises the first upper strata screw rod (1) and the second upper strata screw rod (2), and two screw rod height are identical, do not contact mutually, and rotation direction is identical, and material falls between the screw rod of upper strata by charging notch (5), pushes and mill through screw rod to enter the cavity zone line.Lower floor's screw rod (3) and upper strata screw rod group (1,2) difference interlock, the rotation direction of lower floor's screw rod (3) and the direction of rotation of upper strata screw rod group.The angle that the axle center of two upper strata screw rods is become with lower floor screw rod axial connecting line is 75-85 °, wherein preferred 80-83 °.Under the bottom of screw extruder be provided with thermostat layer (9), in be filled with isothermal liquid or steam, with the bulk temperature of assurance device greater than 40 ℃.

Therefore, the material that enters zone line enters the screw rod group bottom by lower floor's screw rod and the second upper strata screw rod (2) extruding rear section, and remainder enters in the transmission locus of the second upper strata screw rod (2).Subsequently, the material of bottom is after first upper strata screw rod (1) co-extruded, and part enters in the first upper strata screw rod, pushes with the lower floor screw rod once more; Remainder then enters zone line.Enter the material of zone line and the material that directly falls into,, enter respectively in the bottom and the second upper strata screw rod via the lower floor's screw rod and the second upper strata screw rod extruding by the charging notch.It should be noted that, in the extruder of this kind three-screw-rod structure, material resides in carries the time proportion of extruding more in lower floor's screw rod, account for overall 65%～80%, and have only partial material to get back in the screw rod of upper strata through extruding, simultaneously relevant with the viscosity characteristics of material itself, the material that viscosity is bigger, the ratio regular meeting that enters upper strata screw rod extruding is bigger.

Therefore, except routine utilize gear structure reach the device of rotation driving that drives three screw rods simultaneously implement the extruding, also can make two screw rods in top driven by the mode that only drives lower floor's screw rod along screw thread, realize the extruding of material, and reduce too much idle running and power consumption effectively, realize the utilization to greatest extent of power output.

Have fixed structure between described internal layer cavity and outer cavity, to keep the stable of two-layer cavity, fixed structure is with deciding conventional mechanical configurations such as flange, fixed support; And the cushion that described fixed structure also can be made for porous material.And, in the space, bottom of described outer cavity and internal layer cavity, be provided with temperature-adjusting device (8), be heater specifically, may be selected to be resistance heater or steam fumarole, and detect the temperature of each section by the temperature sensor that is arranged on the axial diverse location of extruder.By being arranged on the axially heater of each section, regulate again, reach the control of multistage temperature, be convenient to the extruded product of difference extruding degree and position is carried out temperature control by electric control circuit or steam valve.

Referring to Fig. 7, view for segmentation heating spiral rod device of the present utility model, as shown in the figure, only identify lower floor's screw rod (3), every screw rod all is divided into multistage, comprises extrusion tip (106), be distributed with first extruded segment (101) vertically successively, second extruded segment (102), the 3rd extruded segment (103), the 4th extruded segment (104) and the 5th extruded segment (105).The thread density of every section extruded segment is all inequality, and wherein the first extruded segment thread density maximum of the most close end (106) secondly is second extruded segment and the 4th extruded segment, and the 3rd extruded segment and the 5th extruded segment thread density are less.And, near corresponding each extruded segment, also be assigned heater (8) piecemeal, and specifically can be divided into first heater (81) according to different extruded segment, second heater (82), the 3rd heater (83), the 4th heater (84), slender acanthopanax thermic devices (85).And described heater is in the middle of two screw rod belows, each free independent temperature-adjusting device control.In the utility model, described heater is the thermal resistance of coiling, and is equipped with temperature sensor at corresponding heater place, so that regulate the temperature conditions of each specific position, can realize stepped temperature control.The extrusion temperature of screw extruder generally is controlled at 45-60 ℃, wherein at the 5th extruded segment place that material enters, temperature is controlled at 45-50 ℃, and the 4th extruded segment place temperature is 50-55 ℃, the 3rd extruded segment place temperature is 45-55 ℃, and first and second extruded segment temperature is 55-60 ℃.

Referring to Fig. 6, be of the present utility model pair of extruder omnidirectional distribution structure chart.Comprise two groups screw extruder (10), two groups of extruders are arranged in opposite directions, shared same extrusion die (40), described two extrusion dishes (41) and screw extruder omnidirectional distribution.Simultaneously, also can take the shared same extrusion dies of screw extruder (10) (40) more than layered mode is realized two groups up and down, and the inwall of described extrusion die (40) need pass through dilatation and structure-reinforced, so that it can bear the common immense pressure that produces of many group extruders.

Combined screw-type extrusion device of the present utility model, wherein, described extrusion forming device comprises two groups or above screw extruder (10), and two groups of extruders are arranged in opposite directions, be communicated to same extrusion die (40), described two extrusion dishes (41) and screw extruder omnidirectional distribution.

Above-mentioned combined screw-type extrusion device, wherein, described screw extruder (10) is in changing the screw rod process, by stopping the screw drive axle, subsequently screw rod and the internal layer cavity that is coated on the screw rod outside are unclamped jointly to a certain degree, promptly leave driving shaft fixed position 25 to 50 centimeters, with mechanical arm or hangar system, screw rod internal layer cavity and inner screw rod are replaced simultaneously, and new screw rod cavity and screw rod is mounted on the plant equipment.

Be provided with the dismounting groove on the internal layer cavity of screw rod, the dismounting groove distributes vertically, is positioned on the tangent plane direction of two screw rod contact points.And, by dismantling groove behind its length direction cutting damage, the internal layer cavity can be opened, thereby take out the screw rod be coated on respectively in the cavity, clean separately and safeguard.And can put new internal layer cavity and recycle.

Extrusion molding apparatus of the present utility model, wherein, described cutter sweep below is provided with conveyer (70), and conveyer is accepted the product of cutter sweep excision forming, is transported to an oven dry treating apparatus.

Referring to Fig. 8 and Fig. 9, be respectively the front and the lateral plan of application system of the present utility model (60), described application system is vertical liquid film application system, comprises upper strata fuel reserve tank (61), lower floor's fuel reserve tank (62), oil pump (69) and pipeline road (68); Described oil pump is promoted to the oil plant in lower floor's fuel reserve tank (62) in the upper strata fuel reserve tank (61) aperiodically according to oil mass in lower floor's fuel reserve tank and oil pressure situation.Also comprise a tank sensor module (601), be arranged on fuel tank one sidewall that it is connected with fuel tank internal.This tank sensor module (601) comprises at least one oil pressure sensor and at least one liquid level sensor.Liquid level sensor is sensitive pressure sensor, is arranged on the specified altitude assignment place.When the oil level in lower floor's fuel reserve tank (62) exceeds its position that imposes a condition, this liquid level sensor just can be sensed the pressure from the inner oil plant of lower floor's fuel reserve tank, mean that promptly the oil mass height has reached specified altitude assignment, at this moment, this liquid level sensor sends out the numbered signal of oil plant storage capacity.Simultaneously, oil pressure sensor is to be arranged on bottom lower floor's fuel reserve tank or near the pressure sensor on the sidewall of bottom, along with the oil pump running, oil mass constantly reduces, the measured oil pressure numerical value of oil pressure sensor constantly reduces, when being lower than a setting value, then judge in the described lower floor fuel reserve tank and find time, send the empty signal of lower floor's fuel reserve tank.In addition, when if the oil pump operation is broken down, the measured oil pressure numerical value of oil pressure sensor constantly rises along with the lasting injection of oil mass, when surpassing a setting value, judge that then the oil mass in the described lower floor fuel reserve tank is saturated, then send out the saturated signal of oil mass.Described pipeline road can adopt metal or hard plastic tube, also can adopt plastic hose.In the middle of the described application system is the coated frame (64) of a hollow, and liquid stream (67) formation liquid film that is formed by a plurality of jets that closely are arranged in a row (66) at coated frame (64) top applies the material surface by wherein.The stronger surface tension that described vertical liquid film utilizes grease itself to be had is kept certain thickness liquid and is hung face from above, and its thickness can be controlled in the 0.8-1.5 millimeter according to the selection and the setting of jet.Described coated frame top has oil storage tank (65), in order to store and to distribute the oil in storage of each jet (66).Described oil storage tank directly is communicated with the jet of below, and oil storage tank (65) is adjusted into level, so that the flow of each jet, flow velocity are consistent substantially.Oil storage tank (65) top has a plurality of throttling funnels (63), in order to from the fuel reserve tank of upper strata fluid is delivered in the jet (66), is provided with choke valve in each throttling funnel, can regulate separately, to distribute the average degree of each several part liquid stream in the coated frame.The bore of each jet (66) of application system of the present utility model (60) is 1.5 millimeters to the maximum, and the spacing of described adjacent jet is the 2-5 millimeter, to form the coating liquid stream (67) near complete liquid film.

Referring to Figure 11, in coating control system of the present utility model, each main adjustment module connection diagram.Include control module (600) and application system (60), and, in application system (60), comprise tank sensor module (601), throttling funnel (63), oil pump (69).Signal according to liquid level sensor in the sensor assembly (601) and oil pressure sensor (not shown), the inner choke valve of control oil pump (69) and throttling funnel (63) opens or cuts out, and described oil pump and choke valve are automatically controlled pump and magnetic valve.When control module (600) was received the numbered signal of oil plant storage capacity that liquid level sensor sends, oil pump (69) was opened in control, oil plant stored in lower floor's fuel reserve tank (62) was extracted to upper strata fuel reserve tank (61) the circulation utilization; When oil pressure sensor sent the empty signal of lower floor's fuel reserve tank, oil pump (69) was closed in control module (600) control, stops to pump.In addition, when oil pressure sensor sent the saturated signal of oil mass, control module (600) was directly controlled the inner choke valve of throttling funnel (63) and is closed.

Referring to Figure 10, be the combine schematic diagram of the utility model application system with transfer system, under described conveyer (70) setting and extrusion dish (41) and the cutter blade (32), comprise delivery roller (71) and conveyer belt (72).The cutter arranged outside has the baffle plate (not shown) that coats whole cutter sweep, and the transmission mouth of offering below baffle plate, and the material that cutting is finished is entered on the conveyer belt (72) to be transmitted.Described conveyer belt (72) is that the vibrations that the material on the conveyer belt obtains to a certain degree disperse by the mode of intermittent transfer.Having the baffle plate that prevents material spilling in described conveyer belt both sides, is on the described conveyer belt at baffle plate, all offers tiny hole, flows out for use in the fluid that applies.Material on the conveyer belt, in the process of the coated frame (64) by application system (60), be covered with one deck grease via from top to bottom liquid flow coat after, be sent to next section conveyer belt.And in being provided with the conveyer belt of application system, application system front-back direction place can be provided with the brush and the baffle plate that help fluid to be recycled to lower floor's fuel reserve tank (62), is beneficial to the fluid recovery and uses.

Coat film can play prevent the cereal hydrate inter-adhesive, with the adhesion of machine, further prevent contingent cracking in the follow-up dry run, also be beneficial to the shape maintains of keeping granular cereal hydrate.

Foregoing is exemplifying of specific embodiment of the utility model, for the wherein not equipment of detailed description and structure, should be understood to take the existing conventional equipment in this area to be implemented.

Claims

1. gravity coating control system, be applied to comprise successively feed arrangement (20), screw extruder (10), extrusion die (40), cutter sweep (30), rotary motor case (50), application system (60), apply control module (600), and the cereal contour machining equipment of conveyer belt (70), it is characterized in that:

Described application system (60) is vertical liquid film coating unit, comprises upper strata fuel reserve tank (61), lower floor's fuel reserve tank (62), oil pump (69) and pipeline road (68), tank sensor module (601);

2. gravity coating control system as claimed in claim 1 is characterized in that, described tank sensor module (601) comprises liquid level sensor and oil pressure sensor.

3. gravity coating control system as claimed in claim 2 is characterized in that, the coated frame top has oil storage tank (65), in order to store and to distribute the oil in storage of each jet (66).

4. gravity coating control system as claimed in claim 3 is characterized in that, described oil storage tank (65) top is provided with a plurality of throttling funnels (63), and inside is provided with choke valve; Described coating control module (600) respectively with tank sensor module (601), choke valve in oil pump (69) and the throttling funnel (63) connects.

5. gravity coating control system as claimed in claim 1 is characterized in that, the bore of described jet (66) is 1.5 millimeters to the maximum, and the spacing of described adjacent jet is the 2-5 millimeter, to form the coating liquid stream (67) near complete liquid film.

6. gravity coating control system as claimed in claim 1, it is characterized in that, the coated frame (64) of described coating unit (60) is set to be wrapped in conveyer belt (70) outside, and described conveyer belt (70) is provided with the device that is used to collect reuse oil at the front and back position through coating unit.

7. as any described gravity coating control system in the claim 1 to 6, it is characterized in that having an internal layer cavity in the cavity of described screw extruder (10), with the whole combination of internal screw; The shape of internal layer cavity is close to the edge setting of screw-rod structure; Internal layer cavity (6) is outer also to be provided with an outer cavity (7), is sealed with double-screw structure in the described internal layer cavity, and is supported between the outer cavity (7).