CN109454907B

CN109454907B - One-step forming synthetic film production line

Info

Publication number: CN109454907B
Application number: CN201811166367.5A
Authority: CN
Inventors: 李德顺
Original assignee: Fujian Wellson Machinery Co ltd
Current assignee: Fujian Wellson Machinery Co ltd
Priority date: 2018-10-08
Filing date: 2018-10-08
Publication date: 2021-03-26
Anticipated expiration: 2038-10-08
Also published as: CN109454907A

Abstract

The invention discloses a one-step forming synthetic membrane production line, which is used for producing synthetic membranes synthesized by inorganic mineral powder and plastic rice, and adopts the technical scheme that the production line comprises an internal mixer, wherein the internal mixer comprises a multi-feeding structure and a weightless scale, the multi-feeding structure is arranged at a feeding port of the internal mixer, and the multi-feeding structure comprises at least two feeding hoppers; the weightlessness scale is arranged between the feed hopper and the feed inlet of the internal mixer, and the feeding can be controlled by one or more weightlessness scales; a feed inlet of the double-screw extruder is butted with a discharge outlet of the internal mixer; a casting machine, wherein the discharge port of the double-screw extruder is butted with the feed port of the casting machine. The molding synthetic film production line with the structure belongs to integrated production, and in the production process of the molding synthetic film production line, a granulation link and additional cost are saved, moisture in raw materials is greatly reduced, and the production quality of the synthetic film is greatly improved; in addition, the formula proportion can be adjusted on line in real time through vector weighing to control the material inlet amount and the formula proportion.

Description

One-step forming synthetic film production line

Technical Field

The invention relates to the field of synthetic film production equipment, in particular to a one-step forming synthetic film production line.

Background

In the synthetic film production process, conventional manufacturers purchase synthetic raw rice from a pelletizing plant. After the granulator factory adopts the granulator to produce the synthetic material rice, the synthetic material rice is packaged and transported to a casting machine factory for hot melting and film making or other product making.

Although the production procurement process is quite common, the composite film manufacturer can also find at least several problems in the manufacturing process, one of which is that the transportation process employs personnel and additional transportation vehicles, and the overall transportation cost is greatly increased; secondly, the influence that can receive humid air in transportation and storage process is difficult to avoid, and synthetic material rice itself can absorb moisture, still need to carry out drying process to the raw materials before the secondary membrane manufacturing processing, and the quality of the membrane of production still can be influenced to not only the increase in cost of repetitious heating. Thirdly, the granulation process needs heating and cooling, and the membrane making also needs secondary heating and cooling, combines these two links and can save once heating and cooling, can greatly reduced energy consumption charges of electricity.

The above problems severely restrict the production quality and production cost of the synthetic membrane.

Disclosure of Invention

In view of the above, the present invention provides a one-step forming production line for synthetic film, which can not only greatly reduce the manufacturing cost, but also effectively improve the production quality of the synthetic film.

In order to solve the technical problems, the technical scheme of the invention is as follows: a one-step forming synthetic film production line,

the device comprises an internal mixer, wherein the internal mixer comprises a plurality of feeding structures and a weightless scale, the plurality of feeding structures are arranged at a feeding port of the internal mixer, and the plurality of feeding structures comprise at least two feeding hoppers; the weightlessness scale is arranged between the feed hopper and the feed inlet of the internal mixer, and the feeding can be controlled through the weightlessness scale;

the feed inlet of the double-screw extruder is butted with the discharge outlet of the internal mixer;

the internal mixer is arranged above the double-screw extruder, a distance space is reserved between a discharge port of the internal mixer and a feeding port of the double-screw extruder, and the distance space is used for exhausting materials at the discharge port of the internal mixer before the materials enter the feeding port of the double-screw extruder;

and a discharge port of the double-screw extruder is in butt joint with a feed port of the casting machine.

According to the technical scheme, raw materials used in an original granulator are only required to be poured into a feed hopper, feeding is controlled through a weightless scale, the raw materials directly enter an internal mixer for hot melting, the hot-melted raw materials directly enter a feeding port of a double-screw extruder from an outlet of the internal mixer, and the double-screw extruder directly transmits the hot-melted raw materials to the feeding port of a casting machine for film preparation; in the production process, the transportation cost from a granulating plant to a casting plant is saved, the moisture in the raw materials is greatly reduced, and the production quality of the synthetic film is greatly improved;

in addition, the double-feeding structure can meet the requirement of simultaneous supplement of various materials and can also improve the storage capacity of the fed materials; the material conveying speed can be increased by adopting a double-screw extruder, and the working efficiency is high;

the production line integrates the on-line production, can continuously and stably produce, reduces energy consumption in the on-line production process, solves the influence of moisture on the product quality, solves the influence of plasticizing dispersion of mineral powder and plastic rice on the product quality, and solves the operability of the whole system.

Preferably, the casting machine comprises a rack, two rolling cylinders which are horizontally arranged are mounted on the rack, the cylinder surfaces of the two rolling cylinders are close to each other, an extrusion gap is reserved between the two rolling cylinders, and a discharge port of the double-screw extruder is positioned right above the extrusion gap;

and the frame is provided with a driving source, and the driving source is used for driving the two rolling cylinders to synchronously rotate.

According to the technical scheme, the raw materials in the double-screw extruder directly fall into the extrusion gap, the driving source drives the two rolling cylinders to synchronously rotate, and the two rolling cylinders extrude the raw materials and produce the synthetic film; the mechanism is compact in structure and high in production stability.

Preferably, the two rolling cylinders are divided into an active roller and a passive roller, and the active roller is arranged on the frame;

the rack is horizontally connected with a sliding frame in a sliding manner, and the driven roller is arranged on the sliding frame;

the horizontal driving source is used for driving the sliding frame to horizontally slide and enabling the extrusion space to be large or small.

Through the technical scheme, the thicknesses of different batches of synthetic films are different, the horizontal driving source is started according to the production requirements of different batches of synthetic films, the horizontal driving source can push the sliding frame, the sliding frame can drive the driven roller, and the extrusion gap between the driving roller and the driven roller can be enlarged or reduced along with the sliding frame, so that the production requirements of different batches of contract films can be met.

Preferably, the horizontal driving source comprises a horizontal driving oil cylinder, the horizontal driving oil cylinder is mounted on the frame, and a driving end of the horizontal driving oil cylinder is mounted on the sliding frame.

Through above-mentioned technical scheme, horizontal drive hydro-cylinder can stably drive the slip frame and slide, and the stability of sliding of whole mechanism is higher.

Preferably, a cleaning piece is arranged on the sliding frame and comprises a cleaning brush, and the end part of the cleaning brush is in contact with the outer cylinder surface of the driven roller.

Through the technical scheme, when the outer cylinder wall of the driven roller needs to be cleaned, the end part of the cleaning brush can be in contact with the outer cylinder wall of the driven roller, and attachments on the outer cylinder wall of the driven roller can be scraped off at the end part of the cleaning brush, so that the outer cylinder wall of the driven roller can be cleaned when a synthetic membrane batch is replaced.

Preferably, the sliding frame is provided with an auxiliary driving oil cylinder, the cleaning piece is arranged at the driving end of the auxiliary driving oil cylinder, and the auxiliary driving oil cylinder is used for controlling the distance between the end part of the cleaning brush and the outer cylinder surface of the driven roller.

Through the technical scheme, when the outer cylinder wall of the driven roller needs to be cleaned, the auxiliary driving oil cylinder can push the cleaning brush to move towards the outer cylinder wall of the driven roller, the end part of the cleaning brush is in contact with the outer cylinder wall of the driven roller, and attachments on the outer cylinder wall of the driven roller can be scraped to the end part of the cleaning brush; and when the driven roller works normally, the auxiliary driving oil cylinder can pull the cleaning brush to move in the direction departing from the outer cylinder wall of the driven roller, and the end part of the cleaning brush is separated from the outer cylinder wall of the driven roller.

Preferably, the number of the auxiliary driving oil cylinders and the number of the cleaning pieces are respectively three, the cleaning pieces and the auxiliary driving oil cylinders are arranged in a one-to-one correspondence mode, and the three auxiliary driving oil cylinders are distributed along the outer side of the driven roller.

Through above-mentioned technical scheme, three vice actuating cylinder drives simultaneously, and three cleaning member can contact in passive cylinder outer tube wall and contact, strengthens passive cylinder outer tube wall's cleaning effect.

Preferably, still include ejection of compact portion, the whole connecting pipe that is vertical setting, connecting pipe upper end butt joint in double screw extruder's discharge gate, ejection of compact portion is including the activity head, the vertical slip in the discharge gate of activity head one end is connected, run through being provided with the unloading passageway in the activity head, unloading passageway one end communicates with each other with the discharge gate is inside, the other end and the lower tip that runs through in the activity head, be equipped with elastomeric element in the discharge gate, elastomeric element is used for driving the activity head and slides toward the connecting pipe is inside.

Through the technical scheme, the double-screw extruder can extrude the film raw material into the connecting pipe, the film raw material in the connecting pipe can enter the blanking channel of the movable head, the film raw material can generate downward impact force on the movable head, the movable head can overcome the elastic supporting force of the elastic part and vertically slide downwards along the length direction of the connecting pipe, and the lower end part of the movable head can be close to the roller pressing cylinder; when the flow velocity of the film raw material is increased, the movable head can move downwards adaptively, and the situation of raw material splashing is reduced.

Preferably, be equipped with the first spacing of inside arch on the discharge gate lower port wall and keep off the ring, the upper end lateral wall of activity head is equipped with the spacing fender ring of second, first spacing fender ring supports in the spacing fender ring of second can restrict the activity head and slide out the connecting pipe mutually, elastomeric element is the spring, elastomeric element is located between activity head and the connecting pipe, the elastomeric element both ends link to each other with first spacing fender ring, the spacing fender ring of second respectively.

Through above-mentioned technical scheme, when the material velocity of flow in the connecting tube is great, first spacing fender ring and second spacing fender ring extrude elastomeric element to minimum compression length simultaneously to the restriction activity head continues to slide down, and then increases this connecting device's stability in use.

Preferably, the device also comprises two opening sheets, one end of each opening sheet is hinged at the lower port of the movable head, hinged shafts in the two opening sheets are parallel to each other and are in a horizontal state, and a torsion spring is arranged at the hinged shaft of each opening sheet;

under the action of the torsion spring, the two opening sheets can rotate around the hinge shaft to be contacted with each other and close the lower port of the movable head;

the material falls in the movable head, and the two opening sheets can rotate around the hinge shaft to be separated from each other and open the lower end opening of the movable head.

Through the technical scheme, on one hand, when the raw film does not fall down, the torsion spring can drive the two opening pieces to be mutually closed, so that the probability of external pollutants entering the movable head is reduced, and the manufacturing quality of the film is improved; on the other hand, the falling of the film materials can impact the opening pieces, the opening pieces can overcome the torsion spring, the two opening pieces can be separated from each other, and the film materials can fall along with the falling of the film materials.

The technical effects of the invention are mainly reflected in the following aspects:

(1) in the production process of the synthetic film, the transportation cost from a granulation plant to a casting plant is saved, the moisture in the raw materials is greatly reduced, and the production quality of the synthetic film is greatly improved;

(2) the distance between the driving roller and the driven roller can be adjusted, so that the device is suitable for the production of synthetic films with different thicknesses;

(3) the movable head and the connecting pipe can slide relatively, and the distance between the lower end part of the movable head and the rolling cylinder can be adjusted according to the blanking speed of the film raw material, so that the purpose of controlling the raw material to splash is achieved.

Drawings

Fig. 1 is a schematic view of the overall structure of the embodiment, which is used to highlight the overall structure of the embodiment;

FIG. 2 is an enlarged view of section A of FIG. 1, with emphasis on showing the structure on the rack;

FIG. 3 is an enlarged view of the portion B of FIG. 1, focusing on the internal structure of the discharge portion.

Reference numerals: a. an internal mixer; b. a twin screw extruder; c. a casting machine; d. rolling cylinders; 1. a discharge part; 2. a movable head; 3. a blanking channel; 4. a connecting pipe; 5. an elastic member; 6. a first limit stop ring; 7. a second limit stop ring; 8. a first seal member; 9. a second seal member; 10. an opening sheet; 11. hinging a shaft; 12. a torsion spring; 13. a rotating roller; 14. an accommodating space; 15. a flexible bladder; 16. an air outlet channel; 17. a one-way air outlet valve; 18. an air intake passage; 19. a one-way intake valve; 27. a dual feed configuration; 28. a feed hopper; 29. a weightlessness scale; 30. a frame; 31. an extrusion gap; 32. a drive source; 33. a driving roller; 34. a passive drum; 35. a sliding frame; 36. a horizontal driving source; 37. a horizontal driving oil cylinder; 38. a cleaning member; 39. a cleaning brush; 40. and the auxiliary driving oil cylinder.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings 1-3 to make the technical solution of the present invention easier to understand and grasp.

A one-step forming synthetic film production line mainly comprises an internal mixer a, a double-screw extruder b and a casting machine c and is used for synthesizing synthetic films synthesized by inorganic mineral powder and plastic rice.

Banbury mixer a includes many feed structures, weightless balance 29, and many feed structures are installed in banbury mixer a's feed inlet department, and many feed structures include two at least feeder hoppers 28, and the quantity of feeder hopper 28 is two in this embodiment.

The weightless scale 29 is arranged between the feed hopper 28 and the feed inlet of the internal mixer a, and the weightless scale 29 is an automatic weighing device which realizes high-precision continuous quantitative feeding in a static weighing mode and can reliably, accurately and stably feed powder, particles and other dry and scattered materials, reduce the waste of the materials and improve the consistency of the mixture.

The feeding can be controlled by a weightlessness scale 29, the formula proportion can be adjusted on line, and specifically, a weighing sensor, a PLC (programmable logic controller) and a feeder are arranged in the feeding device, wherein the feeder can be one of a single-shaft screw feeder and a double-shaft screw feeder, adjusting parameters are set on a human-computer interface, when the weighing sensor detects the real weightlessness rate and compares the real weightlessness rate with the required weightlessness rate (set value), the electric signal of the weighing sensor is transmitted to the PLC, the PLC controls the speed of the feeder to automatically correct the deviation value deviating from the set point, so that the materials can be fed between the feeding hopper 28 and the feeding port of the internal mixer a uniformly and accurately.

A feed inlet of the double-screw extruder b is butted with a discharge outlet of the internal mixer a; and a discharge port of the double-screw extruder b is butted with a feed port of the casting machine c.

The casting machine c comprises a frame 30 placed on the ground, two rolling cylinders d arranged horizontally are mounted on the frame 30, the two rolling cylinders d are divided into an active roller 33 and a passive roller 34, and the active roller 33 is mounted on the frame 30; the cylinder surface of the driving roller 33 and the cylinder surface of the driven roller 34 are close to each other with an extrusion gap 31 left therebetween. The discharge port of the twin-screw extruder b is located directly above the extrusion gap 31.

The internal mixer a is arranged above the double-screw extruder b, and a distance space (not shown in the figure) is reserved between the discharge port of the internal mixer a and the feeding port of the double-screw extruder b, and the distance space is used for exhausting before the material at the discharge port of the internal mixer a enters the feeding port of the double-screw extruder b.

The frame 30 is provided with a driving source 32, the driving source 32 can be a driving motor, wherein the driving motor can be respectively connected to the rotating shaft of the driving roller 33 and the rotating shaft of the driven roller 34, the driving motor can drive the driving roller 33 and the driven roller 34 to rotate synchronously in opposite directions, when the molten raw material flows into the extrusion gap 31, the raw material can be extruded out of the synthetic film by the driving roller 33 and the driven roller 34.

A sliding frame 35 is horizontally connected on the frame 30 in a sliding manner, and a driven roller 34 is arranged on the sliding frame 35; the horizontal driving source 36 is further included, the horizontal driving source 36 includes a horizontal driving oil cylinder 37, the horizontal driving oil cylinder 37 is mounted on the frame 30, a driving end of the horizontal driving oil cylinder 37 is mounted on the sliding frame 35, and the horizontal driving source 36 is used for driving the sliding frame 35 to horizontally slide and enabling the extrusion gap 31 to be large or small.

Cleaning elements 38 are arranged on the sliding frame 35, the cleaning elements 38 comprise cleaning brushes 39, and the ends of the cleaning brushes 39 are in contact with the outer cylinder surface of the driven roller 34. The sliding frame 35 is provided with three auxiliary driving oil cylinders 40, the number of the auxiliary driving oil cylinders 40 and the number of the cleaning pieces 38 are respectively three, the cleaning pieces 38 are installed on the driving ends of the auxiliary driving oil cylinders 40, the cleaning pieces 38 and the auxiliary driving oil cylinders 40 are arranged in a one-to-one correspondence mode, and the three auxiliary driving oil cylinders 40 are distributed along the outer side of the driven roller 34. The sub-drive cylinder 40 is used to control the distance between the end of the cleaning brush 39 and the outer surface of the driven roller 34.

In addition, a connecting device is installed between the internal mixer a and the casting machine c. This connecting device is including wholly being connecting pipe 4 of vertical setting, and 4 upper ends of connecting pipe dock in the discharge gate of double screw extruder b, are connected with ejection of compact portion 1 at the lower extreme of activity head 2, and ejection of compact portion 1 is including activity head 2, and the upper end of activity head 2 is vertical to be slided and to be connected in the discharge gate, runs through being provided with unloading passageway 3 in the activity head 2, and the upper end and the discharge gate of unloading passageway 3 are inside to communicate with each other, the other end with run through in the lower tip of activity head 2.

The discharge port of the double-screw extruder b is internally provided with an elastic component 5, in the embodiment, the elastic component 5 is a spring, the elastic component 5 is positioned between the movable head 2 and the connecting pipe 4, the lower port wall of the discharge port is provided with a first limiting blocking ring 6 protruding inwards, the outer side wall of the upper end of the movable head 2 is provided with a second limiting blocking ring 7, the first limiting blocking ring 6 abuts against the second limiting blocking ring 7 to limit the movable head 2 to slide out of the connecting pipe 4, two ends of the elastic component 5 are respectively connected with the first limiting blocking ring 6 and the second limiting blocking ring 7, and the elastic component 5 is used for driving the movable head 2 to slide towards the inside of the connecting pipe 4.

An accommodating space 14 is formed among the first limit stop ring 6, the second limit stop ring 7, the outer side wall of the movable head 2 and the inner pipe wall of the connecting pipe 4, the elastic part 5 is positioned in the accommodating space 14, a flexible air bag 15 is also arranged in the accommodating space 14, one end of the flexible air bag 15 is connected with the first limit stop ring 6, the other end of the flexible air bag is connected with the second limit stop ring 7, an air outlet channel 16 is arranged in the movable head 2, one end of the air outlet channel 16 is connected with the flexible air bag 15, the other end of the air outlet channel is connected with a hinged shaft 11 of the opening sheet 10, and a one-way air outlet valve 17 is arranged; an air inlet channel 18 is arranged on the pipe wall of the connecting pipe 4, one end of the air inlet channel 18 penetrates through the accommodating space 14, the other end of the air inlet channel 18 is communicated with the external environment, a one-way air inlet valve 19 is arranged in the air inlet channel 18, and the flexible air bag 15 is connected with the air inlet channel 18.

A first sealing element 8 is arranged between the first limit baffle ring 6 and the pipe wall of the connecting pipe 4; a second sealing element 9 is arranged between the second limit baffle ring 7 and the outer side wall of the movable head 2. The first sealing element 8 and the second sealing element 9 can adopt 0-shaped rings, the first sealing element 8 is arranged on the inner ring surface of the first limit baffle ring 6, and the second sealing element 9 is sleeved on the outer ring surface of the second limit baffle ring 7.

Two opening pieces 10 are further arranged, one end of each opening piece 10 is hinged to the lower port of the movable head 2, hinged shafts 11 in the two opening pieces 10 are parallel to each other and are in a horizontal state, and torsion springs 12 are mounted at the hinged shafts 11 of the opening pieces 10; under the action of the torsion force of the torsion spring 12, the two opening pieces 10 can rotate around the hinge shaft 11 to be contacted with each other and close the lower end opening of the movable head 2; the material in the movable head 2 falls and the two opening pieces 10 can rotate around the hinge shaft 11 to separate from each other and open the lower port of the movable head 2.

The side wall of the opening sheet 10 departing from the blanking channel 3 is provided with a plurality of rotating rollers 13, and the rotating rollers 13 can be contacted with the wall of a rolling cylinder d of the casting machine c. The plurality of rotating rollers 13 are arranged in parallel, and the rotating axes of the rotating rollers 13 are parallel to the rotating axes of the rolling cylinders d of the casting machine c.

The use process comprises the following steps:

(1) when the double-screw extruder b does not extrude the film raw material, the elastic force of the elastic component 5 drives the movable head 2 to move upwards, the second limit stop ring 7 and the first limit stop ring 6 are away from each other, outside air can enter the flexible air bag 15 through the air inlet channel 18 and the one-way air inlet valve 19, the volume of the flexible air bag 15 in the accommodating space 14 can be increased, the torsion of the torsion spring 12 is applied to the opening pieces 10, the two opening pieces 10 are closed with each other, and the lower end port of the movable head 2 is closed;

(2) according to the thickness of the synthetic film to be produced, the sliding frame 35 is driven to slide by the horizontal driving oil cylinder 37, the size of the extrusion gap 31 between the driving roller 33 and the driven roller is controlled, the auxiliary driving oil cylinder 40 drives the cleaning piece 38 to move towards the outer cylinder wall of the driven roller and cleans the outer cylinder wall of the driven roller, and the auxiliary driving oil cylinder 40 reversely drives the cleaning piece 38 to move towards the direction departing from the driven roller;

the raw materials are poured into the feeding hopper 28, the weight loss scale 29 controls the feeding amount of the feeding hopper 28, the raw materials can enter the internal mixer a from the feeding hopper 28 to be melted, the raw materials in the internal mixer a also enter the double-screw extruder b, when the double-screw extruder b extrudes the film raw materials, the film raw materials can impact the opening sheets 10, the opening sheets 10 can overcome the torsion action of the torsion spring 12, the two opening sheets 10 are mutually separated, the port at the lower end of the movable head 2 is opened, the movable head 2 is impacted by the film raw materials, the movable head 2 slides downwards, the elastic part 5 is compressed and shortened, the volume of the flexible air bag 15 can be reduced, the gas in the flexible air bag 15 can enter the gas outlet channel 16, and the gas can blow towards the hinged shaft 11 and the torsion spring 12;

(3) when the movable head 2 moves downwards to a certain degree, the rotating roller 13 on the side wall of the opening sheet 10 is pressed against the wall of the rolling cylinder d;

(4) the raw material falls into the extrusion gap 31, and the driving roller 33 and the driven roller 34 cooperate with each other to form a composite film.

The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all the technical solutions formed by equivalent substitutions or equivalent changes are within the scope of the present invention as claimed.

Claims

1. A one-step forming synthetic film production line which is characterized in that,

the device comprises an internal mixer (a), wherein the internal mixer (a) comprises a multi-feeding structure and a weightless scale (29), the multi-feeding structure is arranged at a feeding port of the internal mixer (a), and the multi-feeding structure comprises at least two feeding hoppers (28); the weightlessness scale (29) is arranged between the feed hopper (28) and the feed inlet of the internal mixer (a), and the feeding can be controlled through the weightlessness scale (29);

the feed inlet of the double-screw extruder (b) is butted with the discharge outlet of the internal mixer (a);

the internal mixer (a) is arranged above the double-screw extruder, a distance space is reserved between a discharge port of the internal mixer (a) and a feed port of the double-screw extruder (b), and the distance space is used for exhausting before a material at the discharge port of the internal mixer (a) enters the feed port of the double-screw extruder (b);

the discharge port of the double-screw extruder (b) is butted with the feed port of the casting machine (c);

the casting machine (c) comprises a rack (30), two rolling cylinders (d) which are horizontally arranged are mounted on the rack (30), the cylinder surfaces of the two rolling cylinders (d) are close to each other, an extrusion gap (31) is reserved between the two rolling cylinders, and a discharge port of the double-screw extruder (b) is positioned right above the extrusion gap (31);

a driving source (32) is arranged on the rack (30), and the driving source (32) is used for driving the two rolling cylinders (d) to synchronously rotate;

the double-screw extruder is characterized by further comprising a discharging part (1) and a connecting pipe (4) which is vertically arranged integrally, the upper end of the connecting pipe (4) is in butt joint with a discharging port of a double-screw extruder (b), the discharging part (1) comprises a movable head (2), one end of the movable head (2) is vertically connected in the discharging port in a sliding mode, a discharging channel (3) penetrates through the movable head (2), one end of the discharging channel (3) is communicated with the inside of the discharging port, the other end of the discharging channel penetrates through the lower end portion of the movable head (2), an elastic component (5) is arranged in the discharging port, and the elastic component (5) is used for driving the movable head (2) to slide towards;

a first limiting stop ring (6) protruding inwards is arranged on the lower port wall of the discharge port, a second limiting stop ring (7) is arranged on the outer side wall of the upper end of the movable head (2), the first limiting stop ring (6) abuts against the second limiting stop ring (7) to limit the movable head (2) to slide out of the connecting pipe (4), the elastic part (5) is a spring, the elastic part (5) is located between the movable head (2) and the connecting pipe (4), and two ends of the elastic part (5) are respectively connected with the first limiting stop ring (6) and the second limiting stop ring (7);

the device is characterized by also comprising two opening sheets (10), wherein one end of each opening sheet (10) is hinged at the lower port of the movable head (2), hinged shafts (11) in the two opening sheets (10) are parallel to each other and are in a horizontal state, and torsion springs (12) are arranged at the hinged shafts (11) of the opening sheets (10);

under the torsion action of a torsion spring (12), the two opening sheets (10) can rotate around the hinge shaft (11) to be contacted with each other and close the lower port of the movable head (2);

the materials in the movable head (2) fall, the two opening sheets (10) can rotate around the hinge shaft (11) to be separated from each other and open the lower end opening of the movable head (2);

a plurality of rotating rollers (13) are arranged on the side wall of the opening sheet (10) departing from the blanking channel (3), and the rotating rollers (13) can be in contact with the wall of a rolling cylinder (d) of a casting machine (c); the plurality of rotating rollers (13) are arranged in parallel, and the rotating axes of the rotating rollers (13) are parallel to the rotating axes of the rolling cylinders (d) of the casting machine (c).

2. The one-shot synthetic film production line as claimed in claim 1, wherein two of said rolling cylinders (d) are divided into an active roller (33) and a passive roller (34), said active roller (33) being mounted to a frame (30);

a sliding frame (35) is horizontally connected to the rack (30) in a sliding manner, and the driven roller (34) is mounted on the sliding frame (35);

the horizontal driving source (36) is further included, and the horizontal driving source (36) is used for driving the sliding frame (35) to horizontally slide and enabling the extrusion space to be large or small.

3. The production line of one-step molding synthetic film according to claim 2, wherein the horizontal driving source (36) comprises a horizontal driving cylinder (37), the horizontal driving cylinder (37) is installed on the frame (30), and the driving end of the horizontal driving cylinder (37) is installed on the sliding frame (35).

4. The production line of one-shot forming synthetic film according to claim 2 or 3, wherein the sliding frame (35) is provided with a cleaning member (38), the cleaning member (38) comprises a cleaning brush (39), and the end of the cleaning brush (39) is in contact with the outer cylindrical surface of the driven roller (34).

5. The production line of one-step molding synthetic film according to claim 4, wherein the sliding frame (35) is provided with a secondary driving cylinder (40), the cleaning member (38) is mounted on the driving end of the secondary driving cylinder (40), and the secondary driving cylinder (40) is used for controlling the distance between the end of the cleaning brush (39) and the outer cylinder surface of the driven roller (34).

6. The production line of one-step molding synthetic film according to claim 5, wherein there are three secondary driving cylinders (40) and three cleaning members (38), respectively, the cleaning members (38) are disposed in one-to-one correspondence with the secondary driving cylinders (40), and the three secondary driving cylinders (40) are distributed along the outer side of the driven roller (34).