CN110815687A

CN110815687A - PVC sheet calender

Info

Publication number: CN110815687A
Application number: CN201911194376.XA
Authority: CN
Inventors: 雷海英
Original assignee: Wuhan Shengxiang Plastic Products Co Ltd
Current assignee: Taizhou Huangyan Chengxin Environmental Protection Technology Co., Ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-02-21
Anticipated expiration: 2039-11-28
Also published as: CN110815687B

Abstract

The invention provides a PVC sheet calender, which comprises a double-roller extruding mechanism for extruding a PVC material, a staggered transmission mechanism for guiding the material and avoiding the material from generating larger angle deviation in the process of transmission and heating, and a wind power impurity removing mechanism for removing impurities on the material, wherein the double-roller extruding mechanism and the staggered transmission mechanism are installed together, and the wind power impurity removing mechanism is arranged on the staggered transmission mechanism, and relates to the field of calenders. This PVC sheet calender is through setting up crisscross transmission mechanism and the wind-force edulcoration mechanism that closely associates, with the transmission of material, rectify and preheat the unified operation of work integration such as, make full use of wind-force carries out the transmission of control material, edulcoration and preheating, each mechanism complements each other, thereby effectual solved general PVC sheet calender and softened the back and hide dirty and dirty easily, the easy bubble of production and the uneven condition of thickness in the sheet extrusion process, the easy angular deviation of material on the cylinder, cause the damage of material and extravagant problem to a certain extent.

Description

PVC sheet calender

Technical Field

The invention relates to the technical field of calenders, in particular to a pvc sheet calender.

Background

The calender is a device which is arranged by two or more than two rollers according to a certain form and presses and stretches rubber or plastic into a film with a certain thickness and surface shape at a certain temperature. The existing calender has the following problems in actual production:

1. because PVC workshop space is big, and the environment is complicated, so contain a large amount of impurity in the air unavoidably, like this, the dust collector need be used to clear away impurity when the PVC material is walked on the calender. However, since the sheet needs to be heated during the transportation process, there is a high possibility that some impurities are shielded and difficult to remove on the softened sheet, and the impurities can cause the surface of the sheet to be damaged or even generate bubbles when entering the calender

2. In the calendering process, the added bubbles and impurities can influence the thickness of the sheet, so that the sheet is damaged on the material, the quality of the material is reduced, the angle deviation is increased due to uneven material of the sheet on a roller, the angle and the area of the sheet to be cut are increased when the sheet leaves the roller, and the material is greatly wasted, and the condition often exists in the calendering process of double-layer or even multi-layer materials.

In summary, a general PVC sheet calender is easy to store dirt and dirt after being softened, bubbles and uneven thickness are easily generated in the sheet extrusion process, the material is easy to be deviated in angle on a roller, and the material is damaged and wasted to a certain extent, so that a PVC sheet calender is required.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a PVC sheet calender, which solves the problems that a common PVC sheet calender is easy to store dirt and dirty after being softened, bubbles are easy to generate in the sheet extrusion process, the thickness of the sheet is uneven, the material is easy to deviate in angle on a roller, and the material is damaged and wasted to a certain extent.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a PVC sheet calender, includes the two roller extrusion mechanisms that are used for extrudeing the PVC material, is used for the guide and avoids the material to appear the crisscross transmission mechanism of the great deviation of angle and the wind-force edulcoration mechanism that is used for detaching impurity on the material in the transmission heating process, two roller extrusion mechanisms and crisscross transmission mechanism are installed together, wind-force edulcoration mechanism sets up on crisscross transmission mechanism.

Preferably, the double-roller extrusion mechanism comprises two support plates, two transmission rods, a first motor and two extrusion rollers, the first motor is fixedly installed on one support plate, two pairs of bearings are arranged on the two extrusion rollers, the inner rings of the bearings are fixedly connected with the transmission rods, the two extrusion rollers are respectively and fixedly installed on different transmission rods, the two extrusion rollers are vertically and symmetrically distributed, the two transmission rods are fixedly connected with transmission wheels, and first transmission belts are sleeved on the transmission wheels.

Preferably, the staggered transmission mechanism comprises two supporting frames, two baffle plates, a plurality of supporting legs, a second motor, a second transmission belt, a plurality of first transmission roller shafts and a plurality of second transmission roller shafts, wherein the two supporting frames are all fixedly connected with the surfaces of the two supporting plates and are symmetrically distributed up and down, the two baffle plates are positioned between the two supporting frames, the upper and lower surfaces of the two baffle plates are respectively fixedly connected with the surfaces of the upper and lower supporting frames, the two baffle plates are symmetrically distributed by taking the center line of the surfaces of the supporting frames as a symmetry line, the supporting legs are all arranged at the bottom of the supporting frame at the bottom and are fixedly connected with the surface of the supporting frame at the bottom, the second motor is fixedly arranged on the supporting legs, the two supporting frames are respectively provided with a plurality of bearings, the inner rings of the bearings are fixedly connected with rotating rods, the first transmission roller shafts and the second transmission roller shafts are both fixedly connected with the rotating rods on the supporting frames, first transmission roller and the crisscross distribution of second transmission roller, two a second transmission belt has been cup jointed on the surface of bull stick on the carriage, the output shaft of second motor passes through the fixed surface of shaft coupling and bull stick to be connected, sets up two carriages and is used for transmitting two different materials, and it is spacing with the position of transmitting material's space and each transmission structure through the carriage.

Preferably, two equal fixed connection two supporting shoes in surface of carriage, be provided with the bearing on the supporting shoe, the inner circle fixed connection guide arm of bearing, the fixed surface of guide arm connects the guide roller, the surface of guide roller is sunken form, top the guide roller on the carriage is located the upper surface of its place carriage, the below the guide roller on the carriage is located the lower surface of its place carriage, sets up guide arm and guide roller and is for leading the material and tentatively align, and the material of upper and lower both sides passes through the guide roller and separates.

Preferably, the wind power impurity removing mechanism comprises a wind gathering cavity, an exhaust fan, a plurality of ventilation pipes, two communicating pipes, a wind suction groove, a large round ball and a small round ball, the wind gathering cavity is composed of two baffles, an upper support frame, a lower support frame, an upper first transmission roller shaft, a lower first transmission roller shaft and a space between the upper second transmission roller shaft and the lower second transmission roller shaft, the exhaust fan is fixedly installed on the support legs, the support frames are fixedly connected with a plurality of ventilation pipes which are in one-to-one correspondence with the first transmission roller shafts and the second transmission roller shafts, one end of each ventilation pipe penetrates through and extends into the first transmission roller shafts or the second transmission roller shafts, bearings are arranged at the joints of the surfaces of the ventilation pipes and the first transmission roller shafts or the second transmission roller shafts, the surfaces of all the ventilation pipes on the same support frame are connected and communicated with one communicating pipe, a main air pipe is sleeved at the air inlet end, the main air pipe and the branch pipes are respectively connected and communicated with different communicating pipes, a plurality of air suction grooves are formed in the surfaces of the first transmission roller shaft and the second transmission roller shaft, an air gathering cavity is arranged to concentrate wind power, the suction force of the wind power is increased, and the interference from the outside is reduced.

Preferably, the surface of first transmission roller axle and second transmission roller axle all is provided with row's number and the big ball that the groove quantity is the same that induced drafts, and the one end in each groove that induced drafts all is provided with two rows of little balls that distribute side by side, sets up big ball and little ball, is on the one hand for producing wind channel between the surface of material and the transmission roller axle, makes things convenient for the high wind edulcoration, and on the other hand makes the material produce local shake in the groove suction range that induced drafts for the little through wind-force between the big ball, conveniently clears away impurity.

Preferably, one end of the ventilation pipe, which is positioned inside the first transmission roller shaft or the second transmission roller shaft, is fixedly connected with a dust collecting groove, the lower surface of the dust collecting groove is fixedly connected with an arc-shaped elastic sheet, the inner walls of the first transmission roller shaft and the second transmission roller shaft are sleeved with silk mats, the inner wall of the air suction groove is arc-shaped, the inner wall of the arc-shaped elastic sheet is fixedly connected with a reset elastic sheet, the inner wall of the dust collecting groove is fixedly connected with a current collecting point block, the materials of the dust collecting groove, the arc-shaped elastic sheet and the reset elastic sheet comprise plastics, the dust collecting groove inside the first transmission roller shaft is positioned on the inner top wall of the first transmission roller shaft, the dust collecting groove inside the second transmission roller shaft is positioned on the inner bottom wall of the second transmission roller shaft, the integration groove is arranged on one hand to block the air suction groove at partial position, so that the wind power suction direction is fixed at the concave position of the materials, thereby avoiding direct intake of outside air and, on the other hand, absorption of accumulated impurities, avoiding re-discharge of the impurities into the air.

Preferably, gather the one end fixed connection filter screen in wind chamber, the inner wall fixedly connected with electric heating wire in wind chamber gathers, the fixed surface of baffle installs the electric switch, the input of first motor, second motor, air exhauster and electric heating wire all is connected with the output electricity of electric switch, sets up the filter screen and is for filtered air, reduces the entering of impurity, and electric heating wire is done in the society for gathering the inside air heating of hot chamber, and transmission and preheating go on in step.

(III) advantageous effects

(1) According to the invention, by arranging the staggered transmission mechanism, the material can be curved in a longer preheating process, the material is transmitted along the curved direction to increase the transmission contact area, the material transmission is tightly pressed by virtue of the adsorption effect of negative pressure wind power, and the material is always kept to be mutually constrained at a plurality of bent parts in the transmission process under the combined action of the staggered transmission mechanism and the material, so that larger dislocation is difficult to occur in the transmission process, and the condition that the rolled material is damaged and wasted due to improper material position in the rolling process is avoided.

(2) According to the invention, the wind power impurity removing mechanism is arranged, negative hot air is gathered in the material conveying process, wind power in the wind gathering cavity circulates through suction, the material can be uniformly preheated and tightly pressed on the conveying roller shaft, and impurity removal can be carried out by means of a plurality of small and small balls on the surface of the material and a small ventilation space between the conveying roller shaft and the material, the wind power can suck the surface of the material strongly, impurities on the front side and the back side of the material are thoroughly removed, and material bubbles and material damage caused by impurities in the air in the rolling process are avoided.

(3) According to the invention, in the impurity removing process, the structures inside the transmission roller shaft rotate and interact with each other to generate static electricity, and the sucked wind power can be adsorbed by the static electricity to intercept the passing impurities when passing through the transmission roller shaft, so that the impurities are prevented from returning to the air in a workshop again.

(4) According to the invention, the staggered transmission mechanism and the wind power impurity removal mechanism which are closely associated are arranged, the work of material transmission, deviation correction, preheating and the like is integrated and uniformly operated, the wind power is fully utilized to control the material transmission, impurity removal and preheating, and all the mechanisms supplement each other, so that the problems that dirt and dirt are easily stored after a common PVC sheet calender is softened, bubbles and uneven thickness are easily generated in the sheet extrusion process, the material is easily subjected to angle deviation on a roller, and the material is damaged and wasted to a certain extent are effectively solved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of the support frame structure of the present invention;

fig. 3 is a sectional view showing a structure of a first transfer roller of the present invention;

fig. 4 is a sectional view showing a structure of a second carrying roller according to the present invention;

FIG. 5 is a cross-sectional view of a vent construction according to the present invention.

The device comprises a 1 double-roller extrusion mechanism, 11 supporting plates, 12 transmission rods, 13 first motors, 14 extrusion rollers, 15 transmission wheels, 16 first transmission belts, 2 staggered transmission mechanisms, 21 supporting frames, 22 baffle plates, 23 supporting legs, 24 second motors, 25 second transmission belts, 26 first transmission roll shafts, 27 second transmission roll shafts, 28 rotating rods, 29 supporting blocks, 210 guide rods, 211 guide roll shafts, 3 wind power impurity removal mechanisms, 31 air gathering cavities, 32 exhaust fans, 33 ventilation pipes, 34 communicating pipes, 35 air suction grooves, 36 large round balls, 37 small round balls, 38 main air pipes, 39 branch pipes, 310 dust collection grooves, 311 arc-shaped elastic pieces, 312 silk cushions, 313 reset elastic pieces, 314 electric tip gathering blocks, 315 filter screens, 316 electric heating wires and 317 electric switches.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 5, an embodiment of the present invention provides a PVC sheet calender, which includes a double-roller extruding mechanism 1 for extruding PVC material, a staggered conveying mechanism 2 for guiding material and preventing the material from having large angular deviation during the conveying and heating process, and a wind power impurity removing mechanism 3 for removing impurities from the material, wherein the double-roller extruding mechanism 1 is installed together with the staggered conveying mechanism 2, and the wind power impurity removing mechanism 3 is installed on the staggered conveying mechanism 2.

The double-roller extrusion mechanism 1 comprises two supporting plates 11, two transmission rods 12, a first motor 13 and two extrusion rollers 14, wherein the first motor 13 is fixedly installed on one supporting plate 11, two pairs of bearings are arranged on the two extrusion rollers 14, the inner rings of the bearings are fixedly connected with the transmission rods 12, the two extrusion rollers 14 are respectively and fixedly installed on different transmission rods 12, the two extrusion rollers 14 are distributed in a vertical symmetrical mode, the two transmission rods 12 are both fixedly connected with transmission wheels 15, and first transmission belts 16 are sleeved on the transmission wheels 15.

The staggered transmission mechanism 2 comprises two support frames 21, two baffle plates 22, a plurality of support legs 23, a second motor 24, a second transmission belt 25, a plurality of first transmission roller shafts 26 and a plurality of second transmission roller shafts 27, wherein the two support frames 21 are fixedly connected with the surfaces of the two support plates 11, the two support frames 21 are distributed up and down symmetrically, the two baffle plates 22 are positioned between the two support frames 21, the upper and lower surfaces of the two baffle plates 22 are respectively fixedly connected with the surfaces of the upper and lower support frames 21, the two baffle plates 22 are distributed symmetrically by taking the central line of the surfaces of the support frames 21 as a symmetrical line, the plurality of support legs 23 are all arranged at the bottom of the support frame 21 at the lowest part and are fixedly connected with the surface of the support frame 21 at the lowest part, the second motor 24 is fixedly arranged on the support legs 23, the two support frames 21 are all provided with a plurality of bearings, the inner rings of the bearings are fixedly, the first transmission roller shaft 26 and the second transmission roller shaft 27 are fixedly connected with the rotating rods 28 on the supporting frames 21, the first transmission roller shaft 26 and the second transmission roller shaft 27 are distributed in a staggered mode, a second transmission belt is sleeved on the surfaces of the rotating rods 28 on the two supporting frames 21, the output shaft of the second motor 24 is fixedly connected with the surfaces of the rotating rods 28 through a coupler, the surfaces of the two supporting frames 21 are fixedly connected with the two supporting blocks 29, bearings are arranged on the supporting blocks 29, inner rings of the bearings are fixedly connected with the guide rods 210, the surfaces of the guide rods 210 are fixedly connected with the guide roller shafts 211, the surfaces of the guide roller shafts 211 are concave, the guide roller shafts 211 on the upper supporting frames 21 are located on the upper surfaces of the supporting frames 21 where the guide roller shafts are located, and the guide roller shafts 211 on the lower supporting frames 21 are located on the lower surfaces of.

The wind power impurity removing mechanism 3 comprises a wind gathering cavity 31, an exhaust fan 32, a plurality of ventilation pipes 33, two communicating pipes 34, a wind suction groove 35, a large ball 36 and a small ball 37, the wind gathering cavity 31 is composed of two baffles 22, an upper supporting frame 21, a lower supporting frame 21, spaces between all upper first transmission roller shafts 26 and all lower second transmission roller shafts 27, the exhaust fan 32 is fixedly arranged on the supporting frame 23, the supporting frame 21 is fixedly connected with a plurality of ventilation pipes 33 which are in one-to-one correspondence with the first transmission roller shafts 26 and the second transmission roller shafts 27, one end of each ventilation pipe 33 penetrates through and extends into the first transmission roller shafts 26 or the second transmission roller shafts 27, bearings are arranged at the joints of the surfaces of the ventilation pipes 33 and the first transmission roller shafts 26 or the second transmission roller shafts 27, the surfaces of all ventilation pipes 33 on the same supporting frame 21 are connected and communicated with one communicating pipe 34, the wind inlet end of the exhaust fan 32 is sleeved with, the surface of the main air pipe 38 is sleeved with a branch pipe 39, the main air pipe 38 and the branch pipe 39 are respectively connected and communicated with different communicating pipes 34, the surfaces of the first transmission roller shaft 26 and the second transmission roller shaft 27 are provided with a plurality of air suction grooves 35, the surfaces of the first transmission roller shaft 26 and the second transmission roller shaft 27 are respectively provided with a plurality of rows of large beads 36 with the same number as the air suction grooves 35, one end of each air suction groove 35 is provided with two rows of small beads 37 distributed side by side, one end of the ventilation pipe 33 positioned inside the first transmission roller shaft 26 or the second transmission roller shaft 27 is fixedly connected with a dust collecting groove 310, the lower surface of the dust collecting groove 310 is fixedly connected with an arc-shaped elastic sheet 311, the inner walls of the first transmission roller shaft 26 and the second transmission roller shaft 27 are sleeved with silk mats 312, the inner wall of the air suction groove 35 is arc-shaped, the inner wall of the arc-shaped elastic sheet 311 is fixedly connected with a, the material of dust collecting groove 310, arc shell fragment 311 and reset shell fragment 313 includes plastics, the inside dust collecting groove 310 of first transmission roller 26 is located on the interior roof of its place first transmission roller 26, the inside dust collecting groove 310 of second transmission roller 27 is located on the interior diapire of its place second transmission roller 27, gather the one end fixed connection filter screen 315 of wind chamber 31, the inner wall fixedly connected with electric heating wire 316 of gathering wind chamber 31, the fixed surface of baffle 22 installs electric switch 317, first motor 13, second motor 24, the input of air exhauster 32 and electric heating wire 316 all is connected with the output electricity of electric switch 317.

When the PVC material rolling device is used, a power supply is connected, in the first step, two PVC materials to be rolled are adjusted to penetrate into a first transmission roller shaft 26 and a second transmission roller shaft 27 in an upper supporting frame 21 and a lower supporting frame 21 through an upper material guide roller shaft 211 and a lower material guide roller shaft 211, and the materials are inserted and transmitted between the first transmission roller shaft 26 and the second transmission roller shaft 27 in a curve shape until the two materials are both contacted with the position between two squeezing rollers 14; secondly, turning on an electric switch 317, driving a squeezing roller 14 to rotate by a first motor 13 through a transmission rod 12, and rolling the material by the squeezing roller 14; meanwhile, the second motor 24 drives the first transmission roller shaft 26 and the second transmission roller shaft 27 to rotate through the rotating rod 28 and the second transmission belt 25, and the first transmission roller shaft 26 and the second transmission roller shaft 27 transmit materials in a curve; thirdly, the exhaust fan 32 sucks air through the main air pipe 38, the communicating pipe 34 and each air pipe 33, under the action of the large beads 36 and the small beads 37, the wind power circulates rapidly through the air suction grooves 35 located at the material recesses, magazines on the upper and lower surfaces of the material are sucked rapidly by strong wind and enter the first transmission roller shaft 26 or the second transmission roller shaft 27, wherein particularly the wind power sucked by the second transmission roller shaft 27 is mainly concentrated inside the air gathering chamber 31, the air circulates inside the air gathering chamber 31, the circulating wind power carries the heat generated by the electric heating wire 316 to uniformly heat any position of the material, after the wind power circulates inside the first transmission roller shaft 26 or the second transmission roller shaft 27, the first transmission roller shaft 26 or the second transmission roller shaft 27 rotates to drive the silk pad 312 to rub against the dust collection groove 310 and the arc-shaped elastic sheet 311, the static electricity generated by the dust collection groove 310 is concentrated on the electricity gathering block 314 inside the dust collection groove 310, the sucked wind flows through the inside of the dust collecting groove 310, and the foreign substances carried in the wind are electrostatically adsorbed. Thereby completing the use process of the whole pvc sheet calender.

Claims

1. The utility model provides a pvc sheet calender which characterized in that: the device comprises a double-roller extrusion mechanism (1) for extruding PVC materials, a staggered transmission mechanism (2) for guiding materials and avoiding large angle deviation of the materials in the transmission and heating processes, and a wind power impurity removal mechanism (3) for removing impurities on the materials, wherein the double-roller extrusion mechanism (1) and the staggered transmission mechanism (2) are installed together, and the wind power impurity removal mechanism (3) is arranged on the staggered transmission mechanism (2).

2. A pvc sheet calender according to claim 1, characterised in that: two roller extrusion mechanism (1) include two backup pads (11), two transfer lines (12), first motor (13) and two squeeze rolls (14), first motor (13) fixed mounting is on a backup pad (11), two be provided with two pairs of bearings on squeeze roll (14), the inner circle fixedly connected with transfer line (12) of bearing, two squeeze rolls (14) respectively fixed mounting on different transfer lines (12), two squeeze roll (14) are upper and lower symmetric distribution, two equal fixedly connected with drive wheel (15) on transfer line (12), first drive belt (16) has been cup jointed on drive wheel (15).

3. A pvc sheet calender according to claim 2, characterised in that: the staggered transmission mechanism (2) comprises two supporting frames (21), two baffle plates (22), a plurality of supporting legs (23), a second motor (24), a second transmission belt (25), a plurality of first transmission roller shafts (26) and a plurality of second transmission roller shafts (27), wherein the two supporting frames (21) are fixedly connected with the surfaces of the two supporting plates (11), the two supporting frames (21) are symmetrically distributed up and down, the two baffle plates (22) are positioned between the two supporting frames (21), the upper surface and the lower surface of each baffle plate (22) are respectively fixedly connected with the surfaces of the upper supporting frame and the lower supporting frame (21), the two baffle plates (22) are symmetrically distributed by taking the central line of the surfaces of the supporting frames (21) as a symmetrical line, and the plurality of supporting legs (23) are arranged at the bottom of the supporting frame (21) at the bottom and are fixedly connected with the surfaces of the supporting frame (21) at the bottom, second motor (24) fixed mounting is on supporting leg (23), two all be provided with a plurality of bearing on carriage (21), the inner circle fixedly connected with bull stick (28) of bearing, first transmission roller axle (26) and second transmission roller axle (27) all with bull stick (28) fixed connection on carriage (21), first transmission roller axle (26) and second transmission roller axle (27) crisscross distribution, two a second transmission belt has been cup jointed on the surface of bull stick (28) on carriage (21), the output shaft of second motor (24) passes through the fixed surface of shaft coupling and bull stick (28) and is connected.

4. A pvc sheet calender according to claim 3, characterised in that: two equal fixed connection two supporting shoes (29) in surface of carriage (21), be provided with the bearing on supporting shoe (29), inner circle fixed connection guide arm (210) of bearing, the fixed surface of guide arm (210) connects guide roller axle (211), the surface of guide roller axle (211) is sunken form, the top guide roller axle (211) on carriage (21) are located the upper surface of its place carriage (21), the below guide roller axle (211) on carriage (21) are located the lower surface of its place carriage (21).

5. A pvc sheet calender according to claim 4, characterised in that: the wind power impurity removing mechanism (3) comprises a wind gathering cavity (31), an exhaust fan (32), a plurality of ventilation pipes (33), two communicating pipes (34), an air suction groove (35), a large ball (36) and a small ball (37), the wind gathering cavity (31) is composed of two baffles (22), an upper supporting frame (21), a lower supporting frame (21), an upper first transmission roller shaft (26) and a lower first transmission roller shaft (27) and spaces between the upper second transmission roller shaft (27) and the lower second transmission roller shaft (27), the exhaust fan (32) is fixedly installed on the supporting legs (23), the supporting frames (21) are fixedly connected with the plurality of ventilation pipes (33) which are in one-to-one correspondence with the first transmission roller shafts (26) and the second transmission roller shafts (27), one end of each ventilation pipe (33) penetrates through and extends to the inside of the first transmission roller shafts (26) or the second transmission roller shafts (27), and bearings are arranged at the joints of the surfaces of the ventilation pipes (33) and the first transmission roller shafts (, it is same the surface of all ventilation pipes (33) on carriage (21) all is connected and communicates with each other with a communicating pipe (34), the air inlet end cover of air exhauster (32) has connect main tuber pipe (38), the surface of main tuber pipe (38) has cup jointed and has been managed (39) by branch, main tuber pipe (38) and branch pipe (39) are connected and communicate with each other with different communicating pipe (34) respectively, the surface of first transmission roller axle (26) and second transmission roller axle (27) is provided with a plurality of groove (35) that induced drafts.

6. A pvc sheet calender according to claim 5, characterised in that: the surfaces of the first transmission roller shaft (26) and the second transmission roller shaft (27) are provided with large round beads (36) with the same number as the air suction grooves (35), and one end of each air suction groove (35) is provided with two rows of small round beads (37) distributed side by side.

7. A pvc sheet calender according to claim 6, characterised in that: one end of the ventilation pipe (33) positioned in the first transmission roller shaft (26) or the second transmission roller shaft (27) is fixedly connected with a dust collecting groove (310), the lower surface of the dust collecting groove (310) is fixedly connected with an arc-shaped elastic sheet (311), the inner walls of the first transmission roller shaft (26) and the second transmission roller shaft (27) are sleeved with silk cushions (312), the inner wall of the air suction groove (35) is arc-shaped, the inner wall of the arc-shaped elastic sheet (311) is fixedly connected with a reset elastic sheet (313), the inner wall of the dust collecting groove (310) is fixedly connected with the electric-gathering point block (314), the materials of the dust collecting groove (310), the arc-shaped elastic piece (311) and the reset elastic piece (313) comprise plastics, the dust collecting groove (310) in the first transmission roller shaft (26) is located on the inner top wall of the first transmission roller shaft (26), and the dust collecting groove (310) in the second transmission roller shaft (27) is located on the inner bottom wall of the second transmission roller shaft (27).

8. A pvc sheet calender according to claim 7, characterised in that: gather one end fixed connection filter screen (315) in wind chamber (31), the inner wall fixedly connected with electric heating wire (316) in wind chamber (31) gathers, the fixed surface of baffle (22) installs electric switch (317), the input of first motor (13), second motor (24), air exhauster (32) and electric heating wire (316) all is connected with the output electricity of electric switch (317).