CN116858141B - Flatness detection device for PVC film - Google Patents
Flatness detection device for PVC film Download PDFInfo
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- CN116858141B CN116858141B CN202311124669.7A CN202311124669A CN116858141B CN 116858141 B CN116858141 B CN 116858141B CN 202311124669 A CN202311124669 A CN 202311124669A CN 116858141 B CN116858141 B CN 116858141B
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- seat
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- pvc film
- roller
- expansion
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- 238000001514 detection method Methods 0.000 title claims abstract description 47
- 239000012528 membrane Substances 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 238000003825 pressing Methods 0.000 claims description 62
- 230000005540 biological transmission Effects 0.000 claims description 31
- 230000006698 induction Effects 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 239000012790 adhesive layer Substances 0.000 claims description 5
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims 2
- 230000007547 defect Effects 0.000 abstract description 22
- 239000000463 material Substances 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000006872 improvement Effects 0.000 abstract description 3
- 230000008439 repair process Effects 0.000 abstract description 2
- 230000000087 stabilizing effect Effects 0.000 abstract description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 138
- 239000004800 polyvinyl chloride Substances 0.000 description 138
- 230000009471 action Effects 0.000 description 15
- 238000006073 displacement reaction Methods 0.000 description 10
- 238000005286 illumination Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000012943 hotmelt Substances 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000012774 insulation material Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000012937 correction Methods 0.000 description 3
- 230000002596 correlated effect Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- 230000037303 wrinkles Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/26—Registering, tensioning, smoothing or guiding webs longitudinally by transverse stationary or adjustable bars or rollers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/8422—Investigating thin films, e.g. matrix isolation method
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8914—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined
Abstract
The invention discloses a flatness detection device for a PVC film, which comprises a supporting device, an adjusting device, a conveying device and a compensating device, wherein the supporting device is connected with the adjusting device, the adjusting device is connected with the compensating device, the conveying device is connected with the supporting device, the compensating device is movably connected with the supporting device, the supporting device comprises a frame and a carrier plate, a supporting groove is arranged on the frame, the carrier plate is movably connected with the supporting groove, the conveying device comprises a raw material roller and a receiving roller, the raw material roller and the receiving roller are sequentially arranged from back to front along the feeding direction of the PVC film, and the carrier plate is positioned between the raw material roller and the receiving roller. The conveying stability is improved through adjusting device to detect PVC membrane roughness, carry the improvement detection precision through stabilizing, carry out automatic material arrangement through compensation arrangement, carry out automatic compensation to PVC membrane uneven surface, improve PVC membrane production quality, carry out the roughness and detect the back, carry out defect repair through compensation arrangement.
Description
Technical Field
The invention relates to the technical field of flatness detection of PVC films, in particular to a flatness detection device for a PVC film.
Background
The PVC film has the main component of polyvinyl chloride, is semitransparent, can be used alone or used for producing various composite papers, and has the advantages of heat insulation, moisture resistance, light material and the like, so that the PVC film is widely used and is particularly used in various industries.
Because the different application environment also has different requirements on the manufacturing precision of the PVC film, in some film pasting fields with strict requirements on the size, the requirements on the production quality of the PVC film are very strict, and when all the PVC films leave the factory, flatness detection is required, and most of the flatness detection is performed manually or assisted observation is performed manually. However, because the thickness of the PVC film is thinner, the PVC film is softer in material and has certain elasticity, local wrinkles are easily generated in the conveying process, especially when long-distance conveying is performed, the wrinkles are more, white edges are easily caused by extrusion when the wrinkles are rolled, and the later service life is influenced.
In addition, conventional flatness detection device can only detect thickness, can't distinguish PVC membrane roughness and fold part, influences detection precision and detection quality.
Disclosure of Invention
The invention aims to provide a flatness detection device for a PVC film, which is used for solving the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme:
the utility model provides a flatness detection device of PVC membrane, including strutting arrangement, adjusting device, conveyor and compensation arrangement, strutting arrangement and adjusting device connect, adjusting device and compensation arrangement connect, conveyor and strutting arrangement connect, compensation arrangement and strutting arrangement swing joint, strutting arrangement includes frame and support plate, be equipped with the supporting slot on the frame, support plate and supporting slot swing joint, conveyor includes raw materials roller and receipts material roller, raw materials roller and receipts material roller are arranged in proper order from the back to the front along PVC membrane pay-off direction, the support plate is located between raw materials roller and the receipts material roller.
The supporting device is a main installation foundation, PVC film conveying is carried out through the conveying device, conveying stability is improved through the adjusting device, the flatness of the PVC film is detected, detection accuracy is improved through stable conveying, automatic material arrangement is carried out through the compensating device, automatic compensation and restoration are carried out on the uneven surface of the PVC film, PVC film production quality is improved, the supporting plate is installed through the supporting groove by the frame, the PVC film is unreeled from the raw material roller, the upper surface of the supporting plate is penetrated, defect restoration is carried out through the compensating device after flatness detection, winding is carried out through the collecting roller, continuity detection is facilitated, and one side of the collecting roller is provided with a motor for conveying.
Further, the support plate downwards extends to be provided with a plurality of adjusting feet, the frame is provided with a plurality of adjusting grooves, the adjusting feet are arranged in the adjusting grooves, the supporting device further comprises a support, the upper end of the support is provided with a ball joint, the support plate is provided with a rotating groove, the rotating groove downwards extends to be provided with an offset stroke, the ball joint is movably connected with the rotating groove and the offset stroke respectively, the outer ring of the support is provided with a driving ring, one side of the driving ring is provided with a pre-tightening spring, one end of the pre-tightening spring, far away from the driving ring, is in driving connection with the support plate, the adjusting feet comprise a magnet and a jacking electric cylinder, the jacking electric cylinder is arranged in the adjusting groove, the magnet is in driving connection with the support plate, the upper end of the jacking electric cylinder is provided with a jacking seat, the jacking seat is internally provided with a clamping groove, an induction coil is arranged in the clamping groove, and the magnet and the induction coil are concentrically arranged, and are electrically connected with the jacking electric cylinder;
initial state: the carrier plate descends, and the ball joint is in sliding connection with the offset stroke;
when adjusting: the ball joint is rotationally connected with the rotary groove.
The quantity of the regulating feet is four, the regulating feet are respectively used for supporting the carrier plate, the frame is used for installing the regulating feet through the regulating grooves, the supporting grooves are internally provided with the supporting seats, the upper ends of the supporting seats are provided with ball joints, the ball joints are inserted into the rotating grooves, the carrier plate is rotatably supported through the ball joints, in an initial state, under the elastic action of the pre-tightening springs, the ball joints are positioned in the offset stroke, after the PVC film is penetrated, the motor drives the material collecting roller to rotate, so that the PVC film is tensioned, under the action of the tensioning force of the PVC film, the carrier plate is enabled to descend, the pre-tightening springs are further compressed, the ball joints slide out of the offset stroke and enter the rotating grooves, when the PVC film is fully tensioned, under the action of the tensioning force, the carrier plate is enabled to descend simultaneously, the stress of the carrier plate is balanced, when the PVC film is partially relaxed, the PVC film is not tightly attached to the carrier plate, and the transmission efficiency of the carrier plate at the loose position is reduced, after the PVC film drives the carrier plate to descend to the position of tensioning again on the relaxation surface, the original relaxation surface starts to drive the carrier plate at the lower end to descend, thereby make the carrier plate descending length of tensioning surface lower extreme longer than the carrier plate descending length of relaxation surface lower extreme, thereby the carrier plate descends and drives magnet and produce the displacement, carry out the transmission through fastening connection, induction coil does cutting magnetism induction line motion, produce induced current, induced current value size and carrier plate tip down-height are positive correlation, thereby be positive correlation with PVC film tensioning degree, the higher then induced current value of PVC film tensioning, lift up the electric jar output displacement through current difference control, adjust the lower side of relaxation section and offset compensation quantity, thereby carry out automatic correction to the detection substrate, carry out steady tension and carry, detect the substrate roughness, prevent to carry undulant causing PVC film fold, influence roughness detection precision.
Further, adjusting device still includes the mount pad, mount pad one side and frame coupling, the mount pad is located the carrier plate upside, conveyor still includes the tensioning roller, be equipped with the guide way on the carrier plate, tensioning roller and guide way swing joint, be equipped with a plurality of wind gap on the mount pad, the wind gap is to the below, the tensioning roller includes base roller and expansion seat, base roller both ends are equipped with a plurality of expansion grooves respectively, expansion seat and expansion groove sliding connection, be equipped with a plurality of air inlets on the expansion seat, the air inlet is arranged along tensioning roller axial level, the air inlet intermittent type intercommunication under wind gap and the wind inlet under, the air inlet of wind gap and below corresponds the setting, be equipped with the joint spring in the expansion groove, the expansion seat passes through joint spring and base roller transmission and is connected, be equipped with the air duct on the expansion seat, air inlet and air duct intercommunication, air duct one side is equipped with the negative pressure runner, air duct one end and PVC membrane contact are kept away from to the negative pressure runner, the air duct includes the shrinkage cavity, the throat and the reaming, the shrinkage cavity, throat and reaming are arranged in proper order along the air current flow direction, throat is close to reaming one end and negative pressure runner conduction, terminal and expansion groove intercommunication.
The installation seat is installed through the frame, the installation seat and the frame are movably connected, the PVC film is convenient to penetrate, the PVC film is conveyed and detected through a feeding gap between the installation seat and the carrier plate, the PVC film is subjected to auxiliary tensioning through the tensioning roller, the conveying stability of the PVC film is improved, the tensioning roller is arranged in a split mode, the middle is a base roller, a plurality of expansion seats are respectively arranged at two ends, the axes of the expansion seats and the base roller are overlapped, when the PVC film is conveyed in constant tension, the air inlets on the expansion seats are blocked after the PVC film is conveyed to the tensioning roller, the air inlets at the air inlets and the lower ends are not communicated, when the PVC film is wrinkled, the length of the PVC film along the axis direction of the base roller is shortened, the PVC film is used for incompletely shielding the air inlets, the more the air inlets are exposed, the number of the air inlets is increased, the air inlets at the air inlet and the lower side are communicated, and high-pressure air enters the expansion groove through the drainage channel, the shrinkage cavity diameter is gradually reduced, the reaming diameter is gradually expanded, when the gas jet passes through the throat, the flow speed is fastest, the pressure is smallest, negative pressure is generated in the negative pressure flow channel, the negative pressure flow channel inlet is contacted with the PVC film at the upper side, the PVC film is adsorbed at the negative pressure flow channel inlet under the action of the negative pressure, after the gas enters the expansion groove, the instantaneous pressure in the expansion groove is increased, thereby pushing the expansion seat to slide along the expansion groove, the expansion seat stretches out, the wrinkled PVC film stretches towards the end part through the negative pressure adsorption, thereby flattening the PVC film, preventing the PVC film at the wrinkled part from affecting flatness detection, when the local wrinkled degree of the PVC film is larger, the air inlet is more exposed, the instantaneous pressure in the expansion groove is increased after converging through the air guide channel, thereby increasing the stretching out amount of the expansion seat, improving the outward expanding precision of the wrinkled part, after the expansion seat rotates through the wind gap to complete compensation, the expansion seat is automatically reset through the clamping spring.
Further, a feeding gap is arranged between the mounting seat and the carrier plate, the feeding gap is arranged along the feeding direction of the PVC film, the feeding gap is arranged in a three-section mode, the feeding gap is positioned at the front end of the feeding direction of the PVC film, the height of the part of the feeding gap, which is positioned at the front end of the feeding direction of the PVC film, is lower than that of the rear end of the feeding gap, a reversing cambered surface is arranged on the mounting seat, and the reversing cambered surface faces the tensioning roller. Through the design of pay-off clearance syllogic, be located the high lower of front end, be located the high of rear end, the centre is the changeover portion, and changeover portion department is through tensioning roller and switching-over cambered surface tensioning, reduces and carries the influence that fluctuation detected the roughness.
Further, adjusting device still includes a plurality of receipts optical subassembly, it includes parallel light source and light receiving plate to receive optical subassembly, be equipped with the light screen groove on the mount pad, the light receiving plate is arranged in the light screen groove, the light screen groove is located parallel light source rear along the pay-off direction, parallel light source is located switching-over cambered surface one side, parallel light source outgoing light direction is upwards, parallel light source outgoing light and PVC membrane are tangent around the tensioning roller surface, be equipped with a plurality of air gaps on the base roller, the air gap passes through feeding gap and air inlet intercommunication, the light receiving plate includes base region and two electrode plates, base region one side is arranged in to two electrode plates, fill the resin glue film between two electrode plates, two electrode plates link to each other through the wire with the positive, negative pole of power respectively and constitute detection circuitry.
The PVC film flatness is detected through the light receiving component, emergent light is provided by the parallel light source, the emergent light direction is tangential to the outer surface of the PVC film bypassing the tensioning roller, when the surface of the PVC film is flat, the circular arc surface is still ensured when the PVC film is conveyed through the tensioning roller, the emergent light is not intersected, when a groove or a bulge is locally generated on the PVC film, the groove is also converted into an upward bulge through air gap air guide, so that a local defect part of the PVC film is inserted into an emergent light path to form a folding angle, the emergent light deviates from the original direction through refraction, and is deflected to a rear light receiving plate along the folding angle, the light receiving plate and the parallel light source are arranged in a staggered mode, in an initial state, the emergent light is not irradiated to the light receiving plate, when the PVC film locally generates defects, as illumination is enhanced, illumination carriers are increased, a current value between the two electrode plates is increased, the electrode plates are installed through the base region, and the defect part is determined when the detection current value is larger than a standard value.
Further, the compensation device comprises an extension plate, a pressing seat and a pressing cylinder, wherein an extension groove is formed in the carrier plate, the extension plate is in sliding connection with the extension groove, a pressing groove is formed in the mounting seat, an outer frame of the pressing cylinder is in fastening connection with the wall surface of the pressing groove, an output end of the pressing cylinder is in transmission connection with the pressing seat, a hot air hole is formed in the mounting seat, a temperature adjusting chamber is arranged on the pressing seat, and the hot air hole is communicated with the temperature adjusting chamber.
Install to the extension board through epitaxial groove, when the local defect that produces of PVC membrane, output displacement through pushing down the cylinder, drive and press the seat and descend, make the laminating of seat in PVC membrane defect department, hot-blast hole and the tempering room intercommunication on pressing the seat this moment, hot-blast hole and heating tuber pipe intercommunication, the middle material of the bottom surface is hot good conductor under the seat is pressed, carry out the hot melt to defect part through the heat transfer, carry out the superplasticity through pressing down the seat, improve PVC membrane roughness, reduce artifical the participation, carry out sliding guide to pressing the seat through pushing down the groove.
Further, be equipped with the spout on pressing the seat, press cylinder output and spout sliding connection down, be equipped with the cold wind hole on the mount pad, the opening of tempering room is in proper order with hot wind hole and cold wind hole intercommunication, is equipped with the transmission groove on the epitaxial plate, presses the seat downside to be equipped with the lug, presses the seat to pass through lug and transmission groove transmission to be connected, compensation arrangement still includes reset spring, reset spring arranges down in pressing the inslot, reset spring one end and presses the seat transmission to be connected.
The pressing seat descends, the protruding blocks at the lower end are inserted into the transmission grooves on the epitaxial plate, the two sides of the lower bottom surface of the pressing seat are made of heat insulation materials, the heat insulation materials are respectively pressed on the surface of the PVC film to be transmitted, the PVC film is driven to move forward through friction transmission, the pressing seat drives the epitaxial plate to extend out of the epitaxial groove, the epitaxial plate, the pressing seat and the PVC film are enabled to be relatively static, thereby correction is not stopped, local stretch-breaking is prevented when hot melt molding is carried out, when hot melt molding is finished, the opening of the temperature adjusting chamber is moved away from the hot air hole and is conducted with the cold air hole, the PVC film after molding is automatically cooled, compensation efficiency is improved, the reset spring is compressed in the advancing process of the pressing seat, and after the temperature is cooled, the pressing seat drives the epitaxial plate to automatically reset under the action force of the reset spring.
As an optimization, the pressing cylinder is electrically connected with the detection circuit. When the current value on the detection circuit exceeds the standard value, the lower air cylinder is driven to move downwards, so that the defect arrangement is automatically repaired and compensated.
As optimization, a plurality of pressure relief openings are formed in the base roller, one ends of the pressure relief openings are communicated with the expansion groove, and the other ends of the pressure relief openings are communicated with air. The pressure in the expansion tank is automatically released through the pressure release opening, so that the negative pressure in the negative pressure flow channel is prevented from being influenced by pressure accumulation.
Compared with the prior art, the invention has the following beneficial effects: when the PVC film is locally loosened, the PVC film and the carrier plate are not tightly attached, so that the transmission efficiency of the carrier plate at the loosened part is reduced, displacement difference is generated, current difference is generated, the output displacement of the jacking electric cylinder is controlled by the current difference, and the adjustment foundation deviation compensation quantity at the lower side of the loosened section is compensated, so that the detection substrate is automatically corrected, the flatness of the detection substrate is improved, the PVC film is prevented from being wrinkled due to conveying fluctuation, and the flatness detection precision is influenced; when the PVC film generates folds, part of the air inlets are exposed, so that the air inlets at the air inlet and the lower side are communicated, the PVC film is adsorbed at the inlet of the negative pressure flow channel under the action of negative pressure, when the instantaneous pressure in the expansion groove is increased, the expansion seat stretches out, so that the PVC film is flattened, the PVC film at the folds is prevented from affecting flatness detection, when the local folds of the PVC film are larger, the air inlets are exposed more, after the air inlets are converged through the air guide channels, the instantaneous pressure in the expansion groove is increased, so that the stretching quantity of the expansion seat is increased, and the outward expansion precision of the folds is improved; when the PVC film locally generates grooves or bulges, the grooves are also converted into bulges upwards through air gap air guide, so that the locally defective part of the PVC film is inserted into an emergent light optical path to form a folding angle, the emergent light is deflected to the original direction along the folding angle by refraction and is deflected to a rear light receiving plate, the light receiving plate and a parallel light source are arranged in a staggered mode, in the initial state, the emergent light is not irradiated to the light receiving plate, when the PVC film locally generates defects, the emergent light is refracted to a resin adhesive layer, along with illumination enhancement, illumination carriers are increased, the current value between the two electrode plates is increased, the electrode plates are installed through a base region, and when the detection current value is larger than a standard value, the defect part is determined.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic general construction of the present invention;
FIG. 2 is an enlarged view of part A of the view of FIG. 1;
FIG. 3 is a feed guide schematic of the present invention;
FIG. 4 is an enlarged view of part B of the view of FIG. 1;
FIG. 5 is an enlarged view of part C of the view of FIG. 3;
FIG. 6 is a H-H cross-sectional view of the view of FIG. 5;
FIG. 7 is a partial D-amp view of the view of FIG. 6;
FIG. 8 is an E-E cross-sectional view of the view of FIG. 3;
in the figure: the device comprises a 1-supporting device, a 11-frame, a 111-supporting groove, a 112-adjusting groove, a 12-carrier plate, a 121-rotating groove, a 122-offset stroke, a 123-guiding groove, a 124-extending groove, a 13-ball joint, a 14-driving ring, a 2-adjusting device, a 21-adjusting foot, a 211-jacking seat, a 212-induction coil, a 213-magnet, a 214-jacking electric cylinder, a 22-mounting seat, a 221-shading groove, a 222-reversing cambered surface, a 223-pressing groove, a 224-air inlet, a 225-hot air hole, a 226-cold air hole, a 23-collecting component, a 231-parallel light source, a 232-light receiving plate, a 2321-base region, a 2322-electrode plate, 2323-resin adhesive layer, a 3-conveying device, a 31-tensioning roller, a 311-base roller, a 3111-extending groove, a 312-extending seat, 3121-air inlet, 3122-air guide channel, 3123-negative pressure flow channel, a 313-clamping spring, a 32-raw material roller, a 33-collecting roller, a 4-compensating device, a 41-collecting plate, a 42-pressing seat, a 422-pressing spring, a 43-pressing groove and a 44-resetting spring.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides the technical scheme that:
as shown in fig. 1-8, a flatness detection device for a PVC film includes a supporting device 1, an adjusting device 2, a conveying device 3 and a compensating device 4, where the supporting device 1 is connected with the adjusting device 2, the adjusting device 2 is connected with the compensating device 4, the conveying device 3 is connected with the supporting device 1, the compensating device 4 is movably connected with the supporting device 1, the supporting device 1 includes a frame 11 and a carrier plate 12, a supporting groove 111 is provided on the frame 11, the carrier plate 12 is movably connected with the supporting groove 111, the conveying device 3 includes a raw material roller 32 and a receiving roller 33, the raw material roller 32 and the receiving roller 33 are sequentially arranged from back to front along the feeding direction of the PVC film, and the carrier plate 12 is located between the raw material roller 32 and the receiving roller 33.
The strutting arrangement 1 is main installation basis, carry out PVC membrane through conveyor 3, carry stability through adjusting device 2 improvement, and detect PVC membrane roughness, carry and improve detection accuracy through stabilizing, carry out automatic material arrangement through compensation arrangement 4, carry out automatic compensation to PVC membrane uneven surface, restore, improve PVC membrane production quality, frame 11 installs carrier plate 12 through supporting groove 111, the PVC membrane is unreeled from raw materials roller 32, pass carrier plate 12 upper surface, carry out the roughness and detect the back, carry out defect repair through compensation arrangement 4, and carry out the rolling through receiving material roller 33, be convenient for carry out continuity detection, receiving material roller 33 one side sets up the motor and carries.
As shown in fig. 1-3, the carrier plate 12 is provided with a plurality of adjusting feet 21 extending downwards, the frame 11 is provided with a plurality of adjusting grooves 112, the adjusting feet 21 are arranged in the adjusting grooves 112, the supporting device 1 further comprises a support, the upper end of the support is provided with a ball joint 13, the carrier plate 12 is provided with a rotary groove 121, the rotary groove 121 extends downwards and is provided with an offset stroke 122, the ball joint 13 is respectively and movably connected with the rotary groove 121 and the offset stroke 122, the outer ring of the support is provided with a driving ring 14, one side of the driving ring 14 is provided with a pre-tightening spring, one end of the pre-tightening spring, which is far away from the driving ring 14, is in transmission connection with the carrier plate 12, the adjusting feet 21 comprise a magnet 213 and a jacking electric cylinder 214, the jacking electric cylinder 214 is arranged in the adjusting grooves 112, the magnet 213 is in transmission connection with the carrier plate 12, the upper end of the jacking electric cylinder 214 is provided with a jacking seat 211, the jacking seat 211 is internally provided with a clamping groove, the clamping groove is internally provided with an induction coil 212, the magnet 213 and the induction coil 212 are concentrically arranged, and the induction coil 212 is electrically connected with the jacking electric cylinder 214;
initial state: the carrier plate 12 descends, and the ball joint 13 is in sliding connection with the offset stroke 122;
when adjusting: the ball joint 13 is rotatably connected with the rotary groove 121.
The quantity of the adjusting feet 21 is four, the adjusting feet 21 are respectively used for supporting the carrier plate 12, the frame 11 is used for installing the adjusting feet 21 through the adjusting groove 112, a support seat is arranged in the supporting groove 111, a ball joint 13 is arranged at the upper end of the support seat, the ball joint 13 is inserted into the rotating groove 121, the carrier plate 12 is rotatably supported through the ball joint 13, in an initial state, under the action of the elasticity of a pre-tightening spring, the ball joint 13 is positioned in the offset stroke 122, when the PVC film is penetrated, the motor drives the material collecting roller 33 to rotate, so that the PVC film is tensioned, under the action of the tensioning force of the PVC film, the carrier plate 12 is enabled to downwards move down, the pre-tightening spring is further compressed, the ball joint 13 slides out of the offset stroke 122 and enters the rotating groove 121, when the PVC film is fully tensioned, the carrier plate 12 is simultaneously downwards moved under the action of the tensioning force, when the PVC film is locally relaxed, the PVC film is not tightly attached to the carrier plate 12, the transmission efficiency of the carrier plate 12 at the loose position is reduced, when the PVC film drives the carrier plate 12 to descend to a position where the loose surface is re-tensioned, the original loose surface starts to drive the carrier plate 12 at the lower end to descend, so that the descending length of the carrier plate 12 at the lower end of the tensioned surface is longer than the descending length of the carrier plate 12 at the lower end of the loose surface, the carrier plate 12 descends to drive the magnet 213 to generate displacement, the transmission is performed through fastening connection, the induction coil 212 performs cutting magnetic induction line motion to generate induction current, the magnitude of the induction current is positively correlated with the descending height of the end of the carrier plate 12, thus being positively correlated with the tension of the PVC film, the induction current is larger when the PVC film is tensioned, the jacking cylinder 214 is controlled to output displacement through a current difference value, the adjustment foot margin offset compensation quantity at the lower side of the loose section is compensated, thus automatically correcting the detection substrate, performing constant tension conveying, improving the flatness of the detection substrate, preventing the PVC film from being wrinkled due to conveying fluctuation, affecting flatness detection accuracy.
As shown in fig. 1, fig. 3 and fig. 6, the adjusting device 2 further comprises a mounting seat 22, one side of the mounting seat 22 is connected with the frame 11, the mounting seat 22 is located at the upper side of the carrier plate 12, the conveying device 3 further comprises a tensioning roller 31, a guide groove 123 is arranged on the carrier plate 12, the tensioning roller 31 is movably connected with the guide groove 123, a plurality of air inlets 224 are arranged on the mounting seat 22, the air inlets 224 face downwards, the tensioning roller 31 comprises a base roller 311 and an expansion seat 312, a plurality of expansion grooves 3111 are respectively arranged at two ends of the base roller 311, the expansion seat 312 is slidably connected with the expansion grooves 3111, a plurality of air inlets 3121 are arranged on the expansion seat 312, the air inlets 3121 are horizontally arranged along the axial direction of the tensioning roller 31, the air inlets 224 are intermittently communicated with the air inlets 3121 under the carrier plate 12, the air inlets 224 are correspondingly arranged with the air inlets 3121 under the air inlets, the expansion grooves 3111 are in the expansion grooves 3111 and are in transmission connection with the base roller 311 through the clamping springs 313, air inlets 3122 are arranged on the expansion seat 312, the air inlets 3121 are communicated with the air inlets 3122, one side of the air inlets 3122 is provided with the negative pressure flow channel 3123, one end of the negative pressure flow channel 3123 is far away from the air inlet 3122, the air inlet is far from the air inlet 3122 is in the air inlet, the air inlet 3122 is in the air inlet direction of the air inlet is communicated with the air inlet, and is in the air channel 3122 is in the direction of the air channel is communicated with the air channel is, and is communicated with the air, and is the air channel is communicated with the air channel is in the air, and is in the air flow channel is communicated with the air, and is passing through the air through air.
The mounting seat 22 is mounted through the frame 11, the mounting seat 22 is movably connected with the frame 11, so that PVC films are conveniently penetrated, PVC film conveying and detection are carried out through a feeding gap between the mounting seat 22 and the carrier plate 12, auxiliary tensioning is carried out on the PVC films through the tensioning roller 31, PVC film conveying stability is improved, the tensioning roller 31 is arranged in a split mode, the base roller 311 is arranged in the middle, a plurality of expansion seats 312 are respectively arranged at two ends, the axes of the expansion seats 312 are overlapped with the base roller 311, when the PVC films are conveyed to the tensioning roller 31 in a constant tension mode, after the PVC films are conveyed to the tensioning roller 31, air inlets 3121 on the expansion seats 312 are blocked, air inlets 224 are not communicated with air inlets 3121 at the lower end, when the PVC films generate folds, the length of the PVC films along the axis direction of the base roller 311 is shortened, the PVC films incompletely shade the air inlets 3121, the PVC films are more folds, the air inlets 3121 are exposed, the air inlets 3121 are conducted, and the air inlets 3121 at the lower side are conducted, the high-pressure gas is led into the expansion groove 3111 through the drainage of the air guide channel 3122, the shrinkage hole diameter is gradually reduced, the reaming diameter is gradually expanded, when the gas jet flows through the throat, the flow speed is fastest, the pressure is smallest, negative pressure is generated in the negative pressure flow channel 3123, the inlet of the negative pressure flow channel 3123 is contacted with the PVC film at the upper side, the PVC film is adsorbed at the inlet of the negative pressure flow channel 3123 under the action of the negative pressure, when the gas enters the expansion groove 3111, the instantaneous pressure in the expansion groove is increased, so as to push the expansion seat 312 to slide along the expansion groove 3111, the expansion seat 312 extends out, the PVC film of the folds is stretched towards the end part through the negative pressure adsorption, so that the PVC film of the folds is flattened, the PVC film of the folds is prevented from affecting flatness detection, when the local degree of the PVC film is larger, the folds 3121 are exposed more, the instantaneous pressure in the expansion groove 3111 is increased after the confluence is carried out through the air guide channel 3122, so that the expansion seat is increased, the outward expansion precision of the fold part is improved, and when the expansion seat rotates through the air port 224 to complete compensation, the expansion seat is automatically reset through the clamping spring 313.
As shown in fig. 3, a feeding gap is arranged between the mounting seat 22 and the carrier plate 12, the feeding gap is arranged along the feeding direction of the PVC film, the feeding gap is arranged in three sections, the part of the feeding gap, which is positioned at the front end of the feeding direction of the PVC film, is lower than the part of the rear end, a reversing cambered surface 222 is arranged on the mounting seat 22, and the reversing cambered surface 222 faces the tensioning roller 31. Through the design of pay-off clearance syllogic, the height that is located the front end is lower, and the height that is located the rear end is higher, and the centre is the changeover portion, and changeover portion department is through tensioning roller 31 and switching-over cambered surface 222 tensioning, reduces and carries the influence that fluctuation detected the roughness.
As shown in fig. 3 and 5, the adjusting device 2 further includes a plurality of light receiving assemblies 23, the light receiving assemblies 23 include parallel light sources 231 and light receiving plates 232, the mounting base 22 is provided with a light shielding groove 221, the light receiving plates 232 are disposed in the light shielding groove 221, the light shielding groove 221 is located behind the parallel light sources 231 along the feeding direction, the parallel light sources 231 are located on one side of the reversing cambered surface 222, the emergent light directions of the parallel light sources 231 are upward, the emergent light of the parallel light sources 231 and the PVC film are tangential around the outer surface of the tensioning roller 31, the base roller 311 is provided with a plurality of air gaps, the air gaps are communicated with the air inlets 3121 through feeding gaps, the light receiving plates 232 include a base region 2321 and two electrode plates 2322, the two electrode plates 2322 are disposed on one side of the base region 2321, a resin adhesive layer 2323 is filled between the two electrode plates 2322, and the positive and negative electrodes of the power supply are connected through wires respectively to form a detection circuit.
The flatness of the PVC film is detected through the light receiving component 23, emergent light is provided by the parallel light source 231, the emergent light direction is tangential to the outer surface of the PVC film bypassing the tensioning roller, when the surface of the PVC film is flat, the PVC film is conveyed to the tensioning roller to ensure that the circular arc surface is not intersected with the emergent light, when a groove or a bulge is locally generated on the PVC film, the groove is also converted into an upward bulge through air gap air guide, so that a local defect part of the PVC film is inserted into an emergent light path to form a folding angle, the emergent light deflects to the original direction along the folding angle through refraction, the emergent light deflects to the rear light receiving plate 232 along the folding angle, the light receiving plate 232 and the parallel light source 231 are arranged in a staggered mode, in an initial state, the emergent light is not irradiated to the light receiving plate 232, when the PVC film locally generates defects, the emergent light is refracted to a resin glue layer, as illumination is enhanced, an illumination carrier is increased, a current value between the two electrode plates 2322 is increased, the electrode plates 2322 are installed through a base region 2321, and when the detection current value is larger than a standard value, the defect part is determined.
As shown in fig. 3 and 8, the compensation device 4 includes an extension plate 41, a pressing seat 42 and a pressing cylinder 43, an extension groove 124 is provided on the carrier plate 12, the extension plate 41 is slidably connected with the extension groove 124, a pressing groove 223 is provided on the mounting seat 22, an outer frame of the pressing cylinder 43 is fixedly connected with a wall surface of the pressing groove 223, an output end of the pressing cylinder 43 is in transmission connection with the pressing seat 42, a hot air hole 225 is provided on the mounting seat 22, a temperature adjusting chamber 421 is provided on the pressing seat 42, and the hot air hole 225 is communicated with the temperature adjusting chamber 421.
Through the epitaxial groove 124 to install epitaxial plate 41, when the local defect that produces of PVC membrane, output the displacement through pushing down cylinder 43, drive and press seat 42 and descend, make the laminating of seat in PVC membrane defect department, hot-blast hole 225 and the tempering room 421 intercommunication on the seat of pressing this moment, hot-blast hole 225 and heating tuber pipe intercommunication, the middle material of the bottom surface is hot good conductor under the seat of pressing, carry out the hot melt through the heat transfer to defect part, push down through the seat of pressing and carry out the superplasticity again, improve PVC membrane roughness, reduce artifical the participation, carry out the slip direction to the seat 42 through pushing down the groove 223.
As shown in fig. 8, a chute 422 is arranged on the pressing seat 42, the output end of the lower pressing cylinder 43 is slidably connected with the chute 422, a cold air hole 226 is arranged on the mounting seat 22, an opening of the temperature regulating chamber 421 is sequentially communicated with the hot air hole 225 and the cold air hole 226, a transmission groove is arranged on the epitaxial plate 41, a bump is arranged on the lower side of the pressing seat 42, the pressing seat 42 is in transmission connection with the transmission groove through the bump, the compensating device 4 further comprises a reset spring 44, the reset spring 44 is arranged in the lower pressing groove 223, and one end of the reset spring 44 is in transmission connection with the pressing seat 42.
The pressing seat 42 descends to enable the protruding blocks at the lower end to be inserted into the transmission grooves on the epitaxial plate 41, the two sides of the lower bottom surface of the pressing seat are made of heat insulation materials, the heat insulation materials are respectively pressed on the surface of the PVC film to be transmitted, the PVC film is driven to move forward through the friction transmission belt to drive the epitaxial plate 41 to extend out of the epitaxial groove 124 through the pressing seat, the epitaxial plate 41, the pressing seat 42 and the PVC film are enabled to be relatively static, therefore, shutdown correction is not needed, local stretch breaking is prevented when hot melt molding is conducted, when hot melt molding is completed, an opening of the temperature regulating chamber 421 is moved away from the hot air hole 225 and is conducted with the cold air hole 226, accordingly, the PVC film after molding is automatically cooled, compensation efficiency is improved, the reset spring 44 is compressed in the forward moving process of the pressing seat, and after cooling, the pressing seat is enabled to drive the epitaxial plate 41 to automatically reset under the action force of the reset spring 44.
Preferably, the hold-down cylinder 43 is electrically connected to the detection circuit. When the current value on the detection circuit exceeds the standard value, the pressing cylinder 43 is driven to descend, so that the defect arrangement is automatically repaired and compensated.
As an optimization, the base roller 311 is provided with a plurality of pressure relief openings, one ends of the pressure relief openings are communicated with the expansion groove 3111, and the other ends of the pressure relief openings are communicated with air. The pressure in the expansion tank 3111 is automatically released through the pressure release opening, and the negative pressure in the negative pressure flow channel 3123 is prevented from being affected by the pressure accumulation.
The working principle of the invention is as follows: when the PVC film is locally loosened, the PVC film is not tightly attached to the carrier plate 12, so that the transmission efficiency of the carrier plate 12 at the loosened part is reduced, when the PVC film drives the carrier plate 12 to descend to a position where the loosened surface is re-tensioned, the original loosened surface starts to drive the carrier plate 12 at the lower end to descend, so that the descending length of the carrier plate 12 at the lower end of the tensioned surface is longer than that of the carrier plate 12 at the lower end of the loosened surface, displacement difference is generated, the carrier plate 12 drives the magnet 213 to move, the induction coil 212 performs cutting magnetic induction line movement, induced current is generated, the magnitude of the induced current value and the descending height of the end part of the carrier plate 12 are positively correlated, the jacking electric cylinder 214 is controlled to output displacement through the current difference value, and the adjustment foundation deviation compensation quantity at the lower side of the loosened section is compensated; when the PVC film generates folds, the length of the PVC film along the axial direction of the base roller 311 is shortened, the PVC film does not completely shade the air inlet 3121, the more the PVC film folds, the more the air inlets 3121 are exposed, so that the air inlets 224 and the air inlets 3121 at the lower side are communicated, high-pressure air is led to enter the expansion groove 3111 through the drainage of the air guide channel 3122, when the air jet passes through the throat, the flow speed is fastest, the pressure is minimum, negative pressure is generated in the negative pressure flow channel 3123, under the action of the negative pressure, the PVC film is adsorbed at the inlet of the negative pressure flow channel 3123, the instantaneous pressure in the expansion groove is increased after the air enters the expansion groove 3111, the expansion seat 312 is pushed to slide along the expansion groove 3111, the expansion seat 312 stretches out, and the folded PVC film is stretched towards the end part through the negative pressure adsorption, so that the PVC film is flattened; when the PVC film locally generates grooves or bulges, the grooves are also converted into bulges upwards through air gap air guide, so that the local defect part of the PVC film is inserted into an emergent light optical path to form a folding angle, the emergent light is deflected to the original direction along the folding angle by refraction and is deflected to the rear light receiving plate 232, the light receiving plate 232 and the parallel light source 231 are arranged in a staggered mode, in the initial state, the emergent light does not irradiate onto the light receiving plate 232, when the PVC film locally generates defects, the emergent light is refracted onto a resin adhesive layer, along with the increase of illumination, the current value between the two electrode plates 2322 is increased, the electrode plates 2322 are installed through the base regions 2321, and when the detected current value is larger than a standard value, the defect part is determined.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a roughness detection device of PVC membrane which characterized in that: the flatness detection device comprises a supporting device (1), an adjusting device (2), a conveying device (3) and a compensating device (4), wherein the supporting device (1) is connected with the adjusting device (2), the adjusting device (2) is connected with the compensating device (4), the conveying device (3) is connected with the supporting device (1), the compensating device (4) is movably connected with the supporting device (1), the supporting device (1) comprises a frame (11) and a carrier plate (12), a supporting groove (111) is formed in the frame (11), the carrier plate (12) is movably connected with the supporting groove (111), the conveying device (3) comprises a raw material roller (32) and a receiving roller (33), the raw material roller (32) and the receiving roller (33) are sequentially arranged from back to front along the feeding direction of a PVC film, and the carrier plate (12) is positioned between the raw material roller (32) and the receiving roller (33);
the support plate (12) is provided with a plurality of adjusting feet (21) in a downward extending mode, the frame (11) is provided with a plurality of adjusting grooves (112), the adjusting feet (21) are arranged in the adjusting grooves (112), the support device (1) further comprises a support, the upper end of the support is provided with a ball joint (13), the support plate (12) is provided with a rotating groove (121), the rotating groove (121) is provided with an offset stroke (122) in a downward extending mode, the ball joint (13) is respectively movably connected with the rotating groove (121) and the offset stroke (122), the outer ring of the support is provided with a driving ring (14), one side of the driving ring (14) is provided with a pre-tightening spring, one end of the pre-tightening spring, far away from the driving ring (14), is in transmission connection with the support plate (12), the adjusting feet (21) comprise a magnet (213) and a jacking electric cylinder (214), the jacking electric cylinder (214) is arranged in the adjusting grooves (112), the magnet (213) is in transmission connection with the support plate (12), the upper end of the jacking electric cylinder (214) is provided with a jacking seat (121), the jacking electric cylinder (211) is provided with a jacking coil (212), and the coil (212) is arranged in the jacking electric cylinder (212), and the coil (212) is provided with a concentric induction coil (212);
initial state: the carrier plate (12) descends, and the ball joint (13) is in sliding connection with the offset stroke (122);
when adjusting: the ball joint (13) is rotationally connected with the rotary groove (121);
the regulating device (2) further comprises a mounting seat (22), one side of the mounting seat (22) is connected with the frame (11), the mounting seat (22) is positioned on the upper side of the carrier plate (12), the conveying device (3) further comprises a tensioning roller (31), a guide groove (123) is formed in the carrier plate (12), the tensioning roller (31) is movably connected with the guide groove (123), a plurality of air inlets (224) are formed in the mounting seat (22), the air inlets (224) face downwards, the tensioning roller (31) comprises a base roller (311) and an expansion seat (312), a plurality of expansion grooves (3111) are formed in two ends of the base roller (311) respectively, the expansion seat (312) and the expansion grooves (3111) are in sliding connection, a plurality of air inlets (3121) are formed in the expansion seat (312), the air inlets (3121) are horizontally arranged along the axial direction of the tensioning roller (31), the air inlets (224) are intermittently communicated with the air inlets (3121) under the air inlets (224), the air inlets (3121) are correspondingly arranged under the air inlets (224) and the air inlets (3121), the expansion seat (312) are correspondingly provided with the expansion seat (312), the expansion seat (311) is connected with the expansion seat (313) through the expansion seat (313), the expansion seat (313) is connected with the air inlet (312) through the expansion seat (313), one side of the air guide channel (3122) is provided with a negative pressure flow channel (3123), one end of the negative pressure flow channel (3123) far away from the air guide channel (3122) is contacted with the PVC film, the air guide channel (3122) comprises a shrinkage cavity, a throat and a reaming, the shrinkage cavity, the throat and the reaming are sequentially arranged along the airflow flowing direction, one end of the throat close to the reaming is communicated with the negative pressure flow channel (3123), and the reaming tail end is communicated with the expansion groove (3111);
the regulating device (2) further comprises a plurality of light receiving assemblies (23), the light receiving assemblies (23) comprise parallel light sources (231) and light receiving plates (232), the mounting seats (22) are provided with light shielding grooves (221), the light receiving plates (232) are arranged in the light shielding grooves (221), the light shielding grooves (221) are located behind the parallel light sources (231) along the feeding direction, the parallel light sources (231) are located on one side of a reversing cambered surface (222), the emergent light directions of the parallel light sources (231) are upward, emergent light of the parallel light sources (231) and a PVC film are tangential around the outer surface of a tensioning roller (31), the base roller (311) is provided with a plurality of air gaps, the air gaps are communicated with an air inlet (3121) through feeding gaps, the light receiving plates (232) comprise a base region (2321) and two electrode plates (2322), the two electrode plates (2322) are arranged on one side of the base region (2321), and resin adhesive layers (2323) are filled between the two electrode plates (2322), and the two electrode plates are respectively connected with a power supply to form a detection circuit through wires.
2. The flatness detection apparatus for PVC film according to claim 1, wherein: be equipped with the pay-off clearance between mount pad (22) and carrier plate (12), the pay-off clearance is arranged along PVC membrane pay-off direction, and the pay-off clearance syllogic sets up, and the part that the pay-off clearance is located PVC membrane pay-off direction front end highly is less than the part of rear end, be equipped with switching-over cambered surface (222) on mount pad (22), switching-over cambered surface (222) are towards tensioning roller (31).
3. The flatness detection apparatus for PVC film according to claim 2, wherein: the compensating device (4) comprises an extension plate (41), a pressing seat (42) and a pressing cylinder (43), an extension groove (124) is formed in the carrier plate (12), the extension plate (41) and the extension groove (124) are in sliding connection, a pressing groove (223) is formed in the mounting seat (22), an outer frame of the pressing cylinder (43) is fixedly connected with the wall surface of the pressing groove (223), the output end of the pressing cylinder (43) is in transmission connection with the pressing seat (42), a hot air hole (225) is formed in the mounting seat (22), a temperature regulating chamber (421) is formed in the pressing seat (42), and the hot air hole (225) is communicated with the temperature regulating chamber (421).
4. A flatness detection apparatus for PVC film according to claim 3, wherein: the utility model discloses a cold air compressor is characterized in that a chute (422) is arranged on a pressing seat (42), an output end of a lower pressing cylinder (43) and the chute (422) are in sliding connection, a cold air hole (226) is arranged on a mounting seat (22), an opening of a temperature regulating chamber (421) is sequentially communicated with a hot air hole (225) and the cold air hole (226), a transmission groove is arranged on an epitaxial plate (41), a bump is arranged on the lower side of the pressing seat (42), the pressing seat (42) is in transmission connection with the transmission groove through the bump, a compensation device (4) further comprises a reset spring (44), the reset spring (44) is arranged in the lower pressing groove (223), and one end of the reset spring (44) is in transmission connection with the pressing seat (42).
5. The flatness inspection apparatus of a PVC film according to claim 4, wherein: the lower pressure cylinder (43) is electrically connected with the detection circuit.
6. The flatness inspection apparatus of PVC film according to claim 5, wherein: the base roller (311) is provided with a plurality of pressure relief openings, one ends of the pressure relief openings are communicated with the expansion groove (3111), and the other ends of the pressure relief openings are communicated with air.
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