CN209755872U

CN209755872U - PVC film's apparatus for producing

Info

Publication number: CN209755872U
Application number: CN201920230261.0U
Authority: CN
Inventors: 杨礼次
Original assignee: Jiaxing Xin'an Packaging Material Co Ltd
Current assignee: Jiaxing Xin'an packaging material Co.,Ltd.
Priority date: 2019-02-23
Filing date: 2019-02-23
Publication date: 2019-12-10
Anticipated expiration: 2029-02-23

Abstract

The utility model relates to a apparatus for producing of PVC film belongs to PVC membrane production facility technical field, include the frame and set up the roller group in the frame, the frame top is equipped with feed mechanism, and its technical essential is: a cutting mechanism is arranged on one side of the roller group in a propping mode, material receiving grooves are formed in two ends, which are far away from one side of the roller group, of the cutting mechanism, and the two material receiving grooves are connected with an edge material recycling mechanism; the rim charge recovery mechanism comprises a vertically arranged feeding channel and a spiral conveying shaft which is rotatably arranged in the conveying channel, and the conveying channel is communicated with the feeding mechanism. The utility model provides a pair of apparatus for producing of PVC film, during the rim charge after retrieving the cutting through setting up rim charge recovery mechanism and retrieving the mechanism conveys feed mechanism in real time, carries out unloading calendering once more after mixing with original PVC mixture, reduces the heat of PVC rim charge and scatters and disappears for the cost and the energy consumption of PVC rim charge reprocessing reduce.

Description

PVC film's apparatus for producing

Technical Field

The utility model belongs to the technical field of PVC membrane production facility technique and specifically relates to a apparatus for producing of PVC film is related to.

Background

The PVC film, whose main component is a polyvinyl chloride sheet, has good heat resistance, toughness and ductility, and is widely used for surface packaging of various panels, and thus is also called as a decorative film or an adhesive film. A calender is one of the important equipments in the production of PVC film, and it has two or more than two rollers which are arranged according to a certain form and press-spread rubber or plastic into a film with a certain thickness at a certain temperature.

In the calendering process, the molten PVC mixture is rubberized on a calender roller, the roller extrudes the PVC mixture in the rotating process to enable the PVC mixture to extend, and the PVC mixture needs to be extruded into a film with a certain shape and thickness so as to carry out later-stage film drawing and shaping treatment. But because PVC can spread out to both sides under the mutual extrusion's between natural gravity and the roller effect to lead to the thickness in the middle of the PVC mixture on the roller can be greater than the thickness of both sides edge, consequently need get rid of the both sides limit material of PVC film.

after the scraps of the existing PVC film are removed and recovered, the scraps are uniformly crushed and melted after being accumulated to a certain amount, and can be recycled after a series of processes, so that great energy waste is caused in the production process.

Therefore, a new technical solution is needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a apparatus for producing of PVC film, during the rim charge after retrieving the mechanism to the cutting through setting up rim charge retrieves the mechanism and carries out real-time transport feeding mechanism, carries out unloading calendering once more after mixing with original PVC mixture, reduces the heat of PVC rim charge and scatters and disappears for the cost and the energy consumption of PVC rim charge reprocessing reduce.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

A PVC film production device comprises a rack and a roller set arranged on the rack, wherein a feeding mechanism is arranged above the rack, a cutting mechanism is arranged on one side of the roller set in a propping manner, material receiving grooves are arranged at two ends of one side, which is far away from the roller set, of the cutting mechanism, and the two material receiving grooves are connected with an edge material recovery mechanism; the rim charge recovery mechanism comprises a vertically arranged feeding channel and a spiral conveying shaft which is rotatably arranged in the conveying channel, and the conveying channel is communicated with the feeding mechanism.

By adopting the technical scheme, the roller group is arranged on the rack, so that the molten PVC mixture extends under the mutual extrusion of the roller group, the feeding mechanism is arranged on the air of the rack to convey the molten PVC mixture to the roller group, and the cutting mechanisms are arranged to cut the edges of two sides of the PVC film, so that the PVC film is regular in shape and uniform in thickness; connect the silo to receive the PVC rim charge after the cutting through the setting, connect the silo to lead rim charge recovery mechanism with the rim charge, carry out the secondary under rim charge recovery mechanism's effect and use, pay-off passageway and feed mechanism are to the intercommunication, make the PVC rim charge that is cut can be mixed with the molten PVC mixture in being conveyed feed mechanism in real time under the effect of spiral conveying axle, thereby reduce the heat of PVC rim charge and scatter and disappear, make the cost and the energy consumption of PVC rim charge reprocessing reduce.

The utility model discloses further set up to: the feeding channel comprises a shell and a heating cavity arranged in the shell, and a heating shaft is arranged in the spiral conveying shaft.

Through adopting above-mentioned technical scheme, because its temperature of the in-process of conveying can reduce by the PVC rim charge after cutting mechanism cuts, for the ductility of guaranteeing the PVC rim charge, through set up the heating chamber in the casing and at the inside heating shaft that sets up of spiral conveying axle, thereby heat the temperature that guarantees the PVC rim charge to the PVC rim charge and can not reduce, thereby avoid the hardening of PVC rim charge to influence the calendering.

The utility model discloses further set up to: the roller set comprises a first pressing roller, a second pressing roller and a pressing roller set which are arranged from bottom to top, and the pressing roller set comprises a third pressing roller and a fourth pressing roller which are transversely arranged in parallel; and a discharge hole of the feeding mechanism is positioned right above a gap between the third press roller and the fourth press roller.

by adopting the technical scheme, the PVC mixture is extruded for multiple times through the first compression roller, the second compression roller and the compression roller group, so that gas in PVC is continuously extruded out, and the quality of a PVC film is ensured; third compression roller and the horizontal parallel arrangement of fourth compression roller make feed mechanism's discharge gate be located between the clearance between the two, conveniently receive the PVC mixture and avoid the PVC mixture to drop.

The utility model discloses further set up to: the two ends of the roller group along the length direction are provided with adjusting components, and each adjusting component comprises a bidirectional screw rod vertically penetrating through the two ends of the first pressing roller, the second pressing roller and the pressing roller group and a limiting rod arranged on one side of the bidirectional screw rod in parallel; the bidirectional screw rod is in threaded connection with the first compression roller and the compression roller set, and the thread turning directions of two ends of the bidirectional screw rod are opposite.

Through adopting above-mentioned technical scheme, adjust the interval between first compression roller, second compression roller and the compression roller group through setting up adjusting part to make the thickness of PVC film adjust as required, first compression roller and compression roller group and two-way lead screw threaded connection, and because the screw at two-way lead screw both ends revolves to the opposite, when consequently two-way lead screw rotates, first compression roller and compression roller group syntropy or antiport, thereby carry out the interval regulation.

The utility model discloses further set up to: and cooling pipes are arranged inside the third pressing roller and the fourth pressing roller.

Through adopting above-mentioned technical scheme, because the PVC mixture drops between third compression roller and fourth compression roller from feed mechanism, because its temperature of fused PVC mixture is higher, when extrudeing the PVC mixture for avoiding third compression roller and fourth compression roller, because PVC mixture high temperature leads to PVC mixture scorching or adhesion in the extrusion process on the compression roller set, set up the cooling tube for the surface temperature of third compression roller and fourth compression roller is lower, thereby lower the temperature to the PVC mixture.

The utility model discloses further set up to: heating pipes are arranged inside the first pressing roller and the second pressing roller.

Through adopting above-mentioned technical scheme, make the outer wall temperature of first compression roller and second compression roller rise through setting up the heating pipe in first compression roller and second compression roller inside to make the temperature of PVC mixture remain stable, guarantee the ductility of PVC mixture and reduce the calendering effect of PVC film.

the utility model discloses further set up to: the bidirectional screw rod is rotationally connected with a second pressing roller, the second pressing roller comprises a second roller and second connecting blocks rotationally arranged at two ends of the second roller, and the second connecting blocks are fixedly connected with the rack; the first compression roller comprises a first roller and first connecting blocks, the first roller is parallel to the second roller, the first connecting blocks are rotatably arranged at two ends of the first roller, and the first connecting blocks are in threaded connection with the two-way screw rods.

By adopting the technical scheme, the second connecting block is fixedly connected with the rack, so that the stability of connection between the roller set and the rack is ensured, and the rotation of the bidirectional screw rod cannot influence the position of the second pressing roller on the rack by arranging the second pressing roller to be rotationally connected with the bidirectional screw rod; through setting up first roller and first linkage block for first compression roller can change its position along with the rotation of two-way lead screw, can not influence the rotation of first roller simultaneously.

The utility model discloses further set up to: two ends of the third compression roller are rotatably connected with third connecting blocks; the third connecting block is in threaded connection with the bidirectional screw rod, and two ends of the fourth pressing roller are rotatably arranged with the third connecting block.

Through adopting above-mentioned technical scheme, the fourth compression roller rotates with the third connecting block to be connected for third compression roller and fourth compression roller linkage, third connecting block and two-way lead screw threaded connection thereby adjust the interval between compression roller set and the second compression roller through adjusting two-way lead screw.

To sum up, the utility model discloses a beneficial technological effect does: the recycling device is arranged to recycle the leftover materials generated in the production process of the PVC film in time, and the PVC leftover materials are timely supplemented with heat under the dual heating action of the heating cavity and the heating shaft so as to ensure that the PVC leftover materials are in a molten state; the adjusting components are arranged on the two sides of the roller set, so that the distance between the pressing rollers in the roller set is adjusted, and the PVC film production device is suitable for production of PVC films with different thickness requirements.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

Fig. 2 is a partial sectional view of the present invention, mainly showing the connection relationship between the feeding mechanism and the recovery mechanism;

FIG. 3 is a partial sectional view of the present invention, mainly illustrating the connection between the roller set and the frame;

FIG. 4 is an enlarged view of portion B of FIG. 3;

Fig. 5 is an enlarged view of a portion a in fig. 2.

In the figure, 1, a frame; 11. an expanding roller; 111. an external thread; 12. a moving track; 121. a reciprocating screw rod; 122. a cross bar; 123. a reciprocating motor; 2. a roller group; 21. a first press roll; 211. a first roller; 212. a first connection block; 22. a second press roll; 221. a second roller; 222. a second connecting block; 23. a compression roller set; 231. a third press roll; 232. a third connecting block; 233. a fourth press roll; 234. a cooling chamber; 3. an adjustment assembly; 31. a bidirectional screw rod; 32. a limiting rod; 33. rotating the motor; 4. an electric heating tube; 5. a cutting mechanism; 51. adjusting a rod; 52. a slide bar; 53. cutting a cutter; 531. a cutter; 532. a scraper; 54. a base; 6. a receiving hopper; 7. a recovery mechanism; 71. a feed channel; 711. a housing; 712. a heating cavity; 72. a helical transfer shaft; 73. an electrically heated shaft; 74. a transfer motor; 8. a feeding mechanism; 81. extruding the feeding pipeline; 811. a cache cavity; 82. a discharge hopper.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the PVC film production apparatus disclosed by the present invention comprises a frame 1 and a roller set 2 disposed on the frame 1, wherein the roller set 2 comprises a first pressing roller 21, a second pressing roller 22 and a pressing roller set 23 disposed from bottom to top; the compression roller set 23 is the feed end, and first compression roller 21 is the discharge end, and the PVC mixture passes through compression roller set 23, second compression roller 22 and first compression roller 21 for the inside gas of PVC mixture is constantly extruded, thereby guarantees the quality of PVC film.

Referring to fig. 1 and 2, in order to facilitate the adjustment of the thickness of the PVC film according to the production requirements, the roller set 2 is provided with adjusting components 3 along the two ends of the length direction thereof, and the adjusting components 3 include a bidirectional screw rod 31 vertically penetrating through the two ends of the first pressing roller 21, the second pressing roller 22 and the pressing roller set 23 and a limit rod 32 parallel arranged on one side of the bidirectional screw rod 31. Two ends of the bidirectional screw rod 31 are in threaded connection with the rack 1, one end of the bidirectional screw rod is provided with a rotating motor 33, two ends of the limiting rod 32 are fixedly connected with the rack 1, and the limiting rod 32 is in sliding connection with the roller group 2; the rotating motor 33 drives the bidirectional screw rod 31 to rotate, so that the distance between the press rollers on the roller set 2 is adjusted, and the roller set 2 can only move along the axial direction of the bidirectional screw rod 31 under the limitation of the limiting rod 32.

Referring to fig. 2, the bidirectional screw 31 is rotatably connected to the second pressing roller 22, the bidirectional screw 31 is threadedly connected to the first pressing roller 21 and the pressing roller group 23, and the thread directions of both ends of the bidirectional screw 31 are opposite, so that the first pressing roller 21 and the pressing roller group 23 simultaneously move toward the second pressing roller 22 or away from the second pressing roller 22 when the bidirectional screw 31 is rotated. Since the position of the second pressing roller 22 is kept unchanged during the adjustment process, the second pressing roller 22 comprises a second roller 221 and second connecting blocks 222 rotatably arranged at two ends of the second roller 221, and the second connecting blocks 222 are fixedly connected with the frame 1, so that the stability of the connection between the roller set 2 and the frame 1 is ensured.

Referring to fig. 1 and 2, after the PVC film leaves the roller set 2, the edge of the PVC film shrinks due to the elastic recovery of the part of the PVC film, so as to increase the thickness of the PVC film, and in order to reduce the degree of shrinkage of the PVC film, the first compression roller 21 is provided with an expansion roller 11 rotatably connected with the frame 1 in parallel with one side of the cutting mechanism 5, and the expansion roller 11 is abutted against the lower end face of the PVC film. External threads 111 are arranged at two ends of the expanding roller 11, and the thread turning directions of the two external threads 111 are opposite; as the expander roller 11 rotates, the two external threads 111 apply opposing tension to the sides of the film.

Referring to fig. 2, the first pressing roller 21 includes a first roller 211 and first connection blocks 212 rotatably disposed at both ends of the first roller 211, and since the first pressing roller 21 is screw-connected to the bidirectional screw 31, the first connection blocks 212 are screw-connected to the bidirectional screw 31; two ends of the limiting rod 32 are fixedly connected with the frame 1 and penetrate through the first connecting block 212. The press roller group 23 comprises a third press roller 231 and a fourth press roller 233 which are transversely arranged in parallel, the third press roller 231 is arranged right above the second press roller 22 in parallel, two ends of the third press roller 231 are rotatably connected with a third connecting block 232, and the third connecting block 232 is in threaded connection with the two-way screw rod 31.

Referring to fig. 2, since the third pressing roll 231 and the fourth pressing roll 233 are transversely arranged in parallel, so that the roller set 2 is arranged in an inverted L shape, when entering the calender, the PVC mixture falls into the gap between the third pressing roll 231 and the fourth pressing roll 233, thereby preventing the PVC mixture from falling. Both ends of the fourth pressing roller 233 are rotatably arranged with the third connecting block 232, so that the fourth pressing roller 233 is linked with the third pressing roller 231, and when the third pressing roller 231 moves on the bidirectional screw rod 31, the fourth pressing roller 233 is driven to move synchronously.

Referring to fig. 1 and 2, because the temperature of the molten PVC mixture is relatively high, in order to prevent the PVC mixture from being extruded by the third pressing roller 231 and the fourth pressing roller 233, the PVC mixture is burnt or adhered to the pressing roller group 23 in the extrusion process due to the excessively high temperature of the PVC mixture, cooling cavities 234 are respectively arranged inside the third pressing roller 231 and the fourth pressing roller 233, the end parts of the cooling cavities are respectively provided with a water inlet pipe and a water outlet pipe in a rotating manner, and oil seals are arranged between the water inlet pipe and the water outlet pipe and the third pressing roller or the fourth pressing roller.

Referring to fig. 1 and 2, in the calendering process, since the temperature of the PVC mixture is continuously reduced, in order to ensure the ductility of the PVC mixture, the electric heating pipes 4 are arranged inside the first pressing roller 21 and the second pressing roller 22, and the electric heating pipes 4 are respectively rotatably arranged inside the first roller 211 and the second roller 221. When the electric heating pipe 4 is electrically heated, the temperatures of the first roller 211 and the second roller 221 are increased, so that the temperature of the PVC mixture passing through the first pressing roller 21 and the second pressing roller 22 is increased and maintained stable; the ductility of the PVC mixture is ensured, and the calendering effect of the PVC film is reduced.

Referring to fig. 3 and 4, in order to ensure the thickness and shape of the PVC film produced by the calender, a cutting mechanism 5 is disposed at one side of the first pressing roller 21, and the cutting mechanism 5 includes an adjusting rod 51 disposed in parallel with the first pressing roller 21 and cutting tools 53 disposed at two ends of the adjusting rod 51. In order to adapt to the width change of the PVC film in the production process, the adjusting rod 51 is a screw rod capable of moving back and forth, in order to facilitate the adjustment of the cutting tools 53 on the adjusting rod 51, a base 54 in threaded connection with the adjusting rod 51 is fixedly arranged on one side of the cutting tools 53, and the thread turning directions of the two bases 54 are opposite, so that the two cutting tools 53 move oppositely or back to back on the adjusting rod 51.

referring to fig. 2 and 4, in order to ensure that the cutting mechanism 5 can always abut against the side wall of the first pressing roller 21, the adjusting rod 51 is rotatably connected to the first connecting block 212, so that the cutting mechanism 5 can move synchronously with the first pressing roller 21. In order to prevent the bases 54 from rotating when moving on the adjusting rod 51, the two bases 54 are slidably connected with the sliding rod 52, the sliding rod 52 penetrates through the bases 54, and both ends of the sliding rod 52 are fixedly connected with the first connecting block 212, so that the bases 54 can only move along the axial direction of the adjusting rod 51.

Referring to fig. 4, the cutting tool 53 includes a scraper 532 abutting against the outer wall of the first pressure roller 21 and a scraper 531 disposed on one side of the scraper 532 away from the end of the first pressure roller 21, the end of the scraper 531 abuts against the outer side wall of the first pressure roller 21, and the end of the scraper is located above the end of the scraper 532, one side of the scraper 531 away from the scraper 532 is provided with a cutting edge abutting against the PVC film, and the orientation of the cutting edge is opposite to the rotation direction of the first pressure roller 21. When the first press roller 21 is driven by the driving mechanism to rotate, the cutting edge of the utility knife 531 is abutted against the PVC film for cutting, so that the materials on two sides of the PVC film are separated from the PVC film body, the utility knife 531 is in contact with the PVC film before the scraper 532, and the cutting surface on the edge of the PVC film is smoother.

Referring to fig. 3 and 4, in order to avoid pollution to the plant floor and waste of PVC materials caused by the PVC rim charge falling at will, a receiving hopper 6 is arranged below the scraper 532 on the side deviating from the first press roller 21. Because the cutting tool 53 can move on the adjusting rod 51 as required, the opening of the receiving hopper 6 is large, so that the receiving hopper 6 can still receive the PVC scraps when the cutting tool 53 moves. Connect hopper 6 to deviate from its opening one side and be connected with the rim charge and retrieve mechanism 7, for guaranteeing to connect the PVC rim charge in hopper 6 and can enter into the rim charge fast and retrieve mechanism 7, connect hopper 6 and rim charge to retrieve the opening of mechanism 7 link and be less than the opening that connects hopper 6 towards cutting tool 53 one side.

Referring to fig. 2 and 5, the scrap recovery mechanism 7 includes a vertically arranged feeding channel 71 and a spiral conveying shaft 72 rotatably arranged in the conveying channel, the lower end of the feeding channel 71 is communicated with the receiving hopper 6, and the PVC scrap falls into the feeding channel 71. The helical blade of spiral conveying axle 72 contradicts with the inner wall of pay-off passageway 71, and the one end of spiral conveying axle 72 is equipped with conveying motor 74, and conveying motor 74 drives spiral conveying axle 72 and rotates to make the PVC rim charge remove along with the direction of transfer of spiral conveying axle 72.

Referring to fig. 5, because the PVC rim charge is cutting, is collected and the in-process of conveying, the temperature of PVC rim charge can reduce, in order to guarantee that the PVC rim charge can carry out reutilization in step, pay-off passageway 71 includes casing 711 and sets up in the inside heating chamber 712 of casing 711, and the inside rotation of spiral conveying axle 72 is equipped with electric heating shaft 73, under the dual heating of heating chamber 712 and electric heating shaft 73 for its temperature rose when the PVC rim charge conveys in pay-off passageway 71, thereby guarantees the ductility of PVC rim charge. The temperature of the PVC rim charge is supplemented in time and the PVC rim charge is recycled in time through the heating cavity 712 and the electric heating shaft 73, so that the PVC rim charge is prevented from being crushed and melted again after being cooled completely, and the energy required in the recycling process of the PVC rim charge is saved.

Referring to fig. 2, one end of the conveying channel, which is away from the receiving hopper 6, is communicated with a feeding mechanism 8, the feeding mechanism 8 is arranged above the calender, and a discharge port of the feeding mechanism 8 is located above a gap between the third pressing roller 231 and the fourth pressing roller 233. Feed mechanism 8 is including extrusion conveying pipe 81 and play hopper 82, and extrusion conveying pipe 81 is the column with the extrusion of fused PVC mixture and conveys out the hopper 82 in, under the restriction of play hopper 82, the PVC mixture enters into the calender in order.

Referring to fig. 1 and 2, because the PVC film has a certain width, in order to make the PVC mixture more evenly add to the calender, go out hopper 82 along the reciprocating motion of compression roller set 23 length direction, the upper end of frame 1 is equipped with moving rail 12, moving rail 12 includes parallel arrangement's reciprocal lead screw 121 and horizontal pole 122, go out hopper 82 and reciprocal lead screw 121 threaded connection, the one end of reciprocal lead screw 121 is equipped with reciprocating motor 123, under the drive of reciprocating motor 123 and under the restriction of horizontal pole 122, go out hopper 82 along the axial reciprocating motion of reciprocal lead screw 121.

Referring to fig. 2 and 5, feeding channel 71 is linked together with extrusion feeding pipeline 81, and two feeding channel 71 symmetries set up in extrusion feeding pipeline 81 both sides, for avoiding when PVC rim charge gets into extrusion feeding pipeline 81, influence the conveying of original PVC mixture in extrusion feeding pipeline 81, extrusion feeding pipeline 81 both sides correspondence is equipped with buffer memory chamber 811, buffer memory chamber 811 and extrusion feeding pipeline 81 and feeding channel 71 homogeneous phase intercommunication, the rim charge gets into buffer memory chamber 811 in the back slowly with extrude the PVC mixture contact mixture in the feeding pipeline 81.

The implementation process of the embodiment is as follows: the extrusion feed pipe 81 extrudes the PVC mixture into a cylindrical shape and connects the cylindrical PVC mixture into the discharge hopper 82. The discharge port of the discharge hopper 82 is positioned between the third pressing roller 231 and the fourth pressing roller 233, and the PVC mixture uniformly enters the calender along with the reciprocating movement of the discharge hopper 82. The calender is started to enable the roller set 2 on the frame 1 to rotate, the PVC mixture is extruded by the third pressing roller 231 and the fourth pressing roller 233 to be transmitted to a gap between the second pressing roller 22 and the third pressing roller 231 in a sheet shape, and along with the rotation of the second pressing roller 22, the PVC film enters the gap between the second pressing roller 22 and the first pressing roller 21 to be extruded.

When the PVC film is output from the lower part of the first press roller 21, the PVC film is contacted with the scriber 531, so that the edge of the PVC film is cut by the scriber 531 and is separated from the PVC film body, under the action of the scraper 532, the PVC rim charge is separated from the first press roller 21 and falls into the receiving hopper 6, and the receiving hopper 6 leads the PVC rim charge into the recovery mechanism 7. After entering the feeding channel 71, the PVC rim charge is conveyed to the feeding mechanism 8 under the driving of the rotary conveying shaft. When the PVC scrap is conveyed in the feeding channel 71, the PVC scrap is supplemented by double heat of the heating cavity 712 and the electric heating shaft 73, so that the PVC scrap is kept in a molten state for recycling.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a apparatus for producing of PVC film, includes frame (1) and sets up roller group (2) on frame (1), frame (1) top is equipped with feed mechanism (8), its characterized in that: a cutting mechanism (5) is arranged on one side of the roller set (2) in a propping mode, material receiving grooves are formed in two ends, away from one side of the roller set (2), of the cutting mechanism (5), and the two material receiving grooves are connected with an edge material recovery mechanism (7); the rim charge recycling mechanism (7) comprises a vertically arranged feeding channel (71) and a spiral conveying shaft (72) which is rotatably arranged in the conveying channel, and the conveying channel is communicated with the feeding mechanism (8).

2. The PVC film production apparatus according to claim 1, wherein: the feeding channel (71) comprises a shell (711) and a heating cavity (712) arranged in the shell (711), and a heating shaft is arranged in the spiral conveying shaft (72).

3. The PVC film production apparatus according to claim 1, wherein: the roller set (2) comprises a first pressing roller (21), a second pressing roller (22) and a pressing roller set (23) which are arranged from bottom to top, and the pressing roller set (23) comprises a third pressing roller (231) and a fourth pressing roller (233) which are arranged in parallel in the transverse direction; and a discharge hole of the feeding mechanism (8) is positioned right above a gap between the third pressing roller (231) and the fourth pressing roller (233).

4. A PVC film production apparatus as claimed in claim 3, characterised in that: two ends of the roller group (2) along the length direction are provided with adjusting components (3), and each adjusting component (3) comprises a bidirectional screw rod (31) vertically penetrating through two ends of the first pressing roller (21), the second pressing roller (22) and the pressing roller group (23) and a limiting rod (32) parallelly arranged on one side of the bidirectional screw rod (31); the bidirectional screw rod (31) is in threaded connection with the first pressing roller (21) and the pressing roller group (23), and the thread turning directions of two ends of the bidirectional screw rod (31) are opposite.

5. A PVC film production apparatus as claimed in claim 3, characterised in that: and cooling pipes are arranged inside the third pressing roller (231) and the fourth pressing roller (233).

6. A PVC film production device as claimed in claim 5, characterized in that: heating pipes are arranged inside the first pressing roller (21) and the second pressing roller (22).

7. a PVC film production apparatus as claimed in claim 4, wherein: the bidirectional screw rod (31) is rotatably connected with a second pressing roller (22), the second pressing roller (22) comprises a second roller (221) and second connecting blocks (222) rotatably arranged at two ends of the second roller (221), and the second connecting blocks (222) are fixedly connected with the rack (1); the first pressing roller (21) comprises a first roller (211) and first connecting blocks (212), wherein the first roller (211) is parallel to the second roller (221), the first connecting blocks (212) are rotatably arranged at two ends of the first roller (211), and the first connecting blocks (212) are in threaded connection with the two-way screw rod (31).

8. The PVC film production apparatus according to claim 7, wherein: two ends of the third pressing roller (231) are rotatably connected with third connecting blocks (232); the third connecting block (232) is in threaded connection with the bidirectional screw rod (31), and two ends of the fourth pressing roller (233) are rotatably arranged with the third connecting block (232).