CN210632403U

CN210632403U - Drying device of film coating machine

Info

Publication number: CN210632403U
Application number: CN201921558286.XU
Authority: CN
Inventors: 马骁
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-18
Filing date: 2019-09-18
Publication date: 2020-05-29
Anticipated expiration: 2029-09-18

Abstract

The utility model discloses a film coating machine drying device, including the stoving case, the stoving case includes oven box and microwave generation cavity, one of them lateral wall of oven box and one of them lateral wall of microwave generation cavity are connected, be equipped with the magnetron in the microwave generation cavity, be connected with the waveguide on the transmitting end of magnetron be provided with the waveguide mouth in the oven box to be equipped with the antenna in the oven box, antenna and waveguide mouth intercommunication, magnetron produce the microwave, the microwave transmits to the waveguide mouth through the waveguide, launches to the oven box through the coupling of antenna, all opens the slot on the lateral wall that the oven box is connected with microwave generation cavity is adjacent, be equipped with the tensioning structure that can tension the film in slot department, tensioning structure and slot contact; by adopting microwave heating and arranging the tensioning structure, the film is effectively tensioned when entering the drying process and water molecules in the coating are uniformly dissipated, so that the generation of grains and cracks on the surface of the film coating is avoided.

Description

Drying device of film coating machine

Technical Field

The utility model relates to a coating machine stoving field specifically is a film coating machine drying device.

Background

In recent years, functional thin film products of polymer substrates have become more and more popular in various fields, and particularly, thin films having optical functions have become more and more popular. The polymer film (such as PET, PC, PMMA, PVC, TAC and the like) has excellent optical property and physical and mechanical property, and the functionality of the polymer film materials is improved and the application value is increased by implementing additional functional coatings such as surface hardening coatings or some special functional coatings.

With the development of science and technology, the types of functional coatings for the film are more and more, different types of coatings can endow the film with more complete use functions and protective decoration effects, and the application range of the film materials can be greatly enriched. At present, coating coats and adopts the hot-air to dry after on the film, but the coating adhesive force that the hot-air was dried in the actual production process is not strong, drop easily, and adopt the in-process of hot-air stoving coating, thereby because the blow of hot-air and to the pincher trees of film nature can make the coating form the decorative pattern to the surperficial unevenness of film, cause the reduction of coating effect, and the inside and outside inhomogeneous of being heated of coating, the coating chaps easily to form, so how on effectual basis carrying out the drying to the coating, the quality of guarantee coating just becomes the problem that the coating machine stoving field is waited to solve urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the in-process that the coating was adopted hot-air drying coating on the film, because the external force that receives the blowing, support and the coating hydrone scatters and disappears reasons such as inhomogeneous and cause the film surface to produce pincher trees and make the coating surface produce the not enough of line and crackle, a film coating machine drying device is provided, through using this device, by effective tensioning and make the coating hydrone evenly scatter and disappear when can making the film get into drying process, thereby avoid the production of film coating surface line and crackle.

The purpose of the utility model is mainly realized through the following technical scheme:

film coating machine drying device, including the stoving case, stoving bottom of the case face is equipped with many support columns, is equipped with air intake and air exit on the stoving case, the stoving case includes stove case and microwave emergence cavity, stove case and microwave emergence cavity are connected, be equipped with the magnetron in the microwave emergence cavity, be connected with the waveguide on the transmission end of magnetron be provided with the waveguide mouth in the stove case to be equipped with the antenna in the stove case, antenna and waveguide mouth intercommunication, magnetron produce the microwave, the microwave passes through the waveguide and transmits the waveguide mouth, and the coupling through the antenna is launched to the stove incasement, and it has the slot to open on the relative both sides wall of stove case, enters at the film the slot department is equipped with the tensioning structure that can adjust film rate of tension, the air intake sets up in stove bottom of the case face, is equipped with the air exit at stove top of the case face.

In the prior art, after coating on a film, the coating is dried by hot air, in the actual use process, the utility model people find that firstly, the coating coated on the film has weak adhesive force and is easy to bubble, secondly, when the coating surface is dried by hot air, the film wrinkles and cracks are easy to generate on the coating surface when the patterns are serious, aiming at the situation, the utility model people carry out detailed analysis, find that the surface of the film material is smooth, adopt hot air drying, the hot air can spread at the action points when acting on the coating surface, so that the coating surface forms ripple-type patterns, which affects the coating quality, when the hot air directly acts on the film surface, the film wrinkles are easy to generate by external force, before entering the drying stage, the film also generates longitudinal or transverse wrinkles due to the reason of transportation support, the existing drying process does not have a tensioning structure for the wrinkles, and in the coating curing process, the surface layer of the coating firstly absorbs heat and is dried, the inner layer of the coating then absorbs heat and is dried, the inner layer and the outer layer of the coating can form poor drying gradient, the coating is not uniformly heated, the coating attached to the surface of the film easily falls off, the coating is not uniformly coated on the surface of the film, the overall effect of coating the coating on the film is influenced, the coating surface adhesion is reduced due to the nonuniform dispersion of water molecules of the coating caused by the poor drying gradient inside and outside, cracks are easily generated under the influence of the wrinkles of the film, and the surface is cracked, even if no cracks occur at the moment, because the external coating is dried firstly, the thermal stress inside the coating cannot be completely released, the wrinkles of the film can cause extremely nonuniform distribution of the thermal stress, and the nonuniform thermal stress inside the coating can be gradually released in the cooling process, the uneven release of thermal stress eventually leads to cracking of the surface coating layer and thus to a great influence on the coating quality.

In the utility model, a magnetron is arranged in a microwave generating cavity, a waveguide is connected on the transmitting end of the magnetron, an antenna is arranged in a furnace box and is communicated with a waveguide port, microwave generated by the magnetron is transmitted to the waveguide port through the waveguide, narrow slits are arranged on two side walls of the furnace box, when in use, a film passes through one of the narrow slits to enter the furnace box and then passes through the other narrow slit to leave the furnace box, a tensioning mechanism is arranged at the narrow slit to adjust the tension of the film at an inlet, the height of the narrow slit is as small as possible on the basis of slightly larger than the height sum of the film and a coating layer so as to avoid the microwave from leaking from the narrow slit, and the gap between the surface of the coating layer and the narrow slit is preferably less than one fourth of the wavelength of the microwave, so that the microwave cannot escape from the narrow slit when encountering the narrow slit, and the microwave is densely distributed in the furnace box by continuously reflecting on the inner wall, in the process of heating the coating by the microwaves, because water molecules exist in the coating, the microwaves and the water molecules directly act to promote the water molecules to move fast, so that the coating is heated from inside to outside at the same time, and because the heating time is fast, the water molecules in the coating quickly escape, so that the coating is dried fast, and the problem that lines and cracks are generated on the surface of the coating due to the wrinkles and uneven heating of the film when the coating is dried on the film is solved; when the traditional hot air equipment is adopted, the occupied space is larger due to the larger equipment volume, and the film is heated by adopting the microwave, and the space can be more effectively utilized due to the smaller equipment volume for transmitting the microwave, so that the space occupation cost in the production work is greatly reduced, and the utility model has the advantages of simple use mode and convenient operation, and can also effectively save part of human resource consumption; after drying the film in the stove incasement, produce a large amount of steam and need discharge, in order to absorb outside air simultaneously and get into the stove incasement, the hot-air up moves, the utility model discloses in set up the air intake in stove bottom surface, be equipped with the air exit at stove top surface, make things convenient for the admitting air and the exhaust of stove case, do not influence the coating quality of film for the flow of guarantee gas, all be equipped with the cross spoiler at air intake and air exit, at actual carminative in-process, also can select carminative position according to actual conditions, provide multiple selection for the exhaust position.

Furthermore, the tensioning structure comprises a sliding supporting block, the sliding supporting block is positioned on the narrow slit, two cavity shells which are arranged in the same row are fixedly connected above the sliding supporting block, the two cavity shells are symmetrical along the central line of the two cavity shells, an opening is formed in the top of each cavity shell, a negative pressure rotating disc is arranged above the opening, the edge of each negative pressure rotating disc is in contact with the end face of the opening of each cavity shell, a plurality of air holes are formed in the surface of each negative pressure rotating disc, and a cross-shaped partition plate capable of dividing the interior of each cavity shell into four independent parts is arranged below each negative pressure rotating disc; establishing a coordinate system by taking a cross partition plate in a cavity shell on the left side of the narrow slit as a reference, taking the center of the cross partition plate as an original point, enabling an x axis to be parallel to the narrow slit, enabling a y axis to extend in the positive direction along the moving direction of the film, enabling the part of the cavity shell on the left side, which is positioned in the first quadrant of the coordinate system, to be a negative pressure area, and enabling the part of the cavity shell on the left side, which is positioned in the fourth quadrant; the side face of the sliding support block outside the furnace box is fixedly connected with a turbine shell, a turbine fan is installed in the turbine shell, a vent pipe is arranged between the turbine shell and the negative pressure region, and the turbine shell is communicated with the negative pressure region through the vent pipe.

Because the film has long movement distance in the production process and longer movement time and has partial external force function, the utility model arranges a tensioning structure at the narrow slit to ensure that the film entering the oven box is in the tensioning state, and the existing tensioning structure adopts the clamping mode to tension the film, thereby undoubtedly damaging the coating on the surface of the film, the utility model divides the cavity shell into four independent parts, wherein the four parts comprise a normal pressure area and a negative pressure area, a turbo fan is adopted to provide negative pressure for the negative pressure area, meanwhile, the film passes through the surface of the negative pressure rotating disc, the air holes on the surface of the negative pressure rotating disc are distributed in a circular arc shape, the diameters of the air holes are arranged in sequence from small to large, when the film moves onto the negative pressure rotating disc, the edge of the film is attracted by the air holes of the negative pressure area to be attached to the negative pressure rotating disc, and because the film moves, the negative pressure rotating disc is driven to rotate, the sucked point on the film begins to be pulled outwards along the circumference until the film is finally separated from the negative pressure rotating disc to achieve the aim of tensioning the film, the size of the air hole on the negative pressure rotating disc is changed periodically, the size of the air hole changes the size of the negative pressure so that the film cannot be excessively tensioned, a bearing is arranged between the negative pressure rotating disc and the cross partition plate to fix and support the negative pressure rotating disc, the bearing is embedded into the cross partition plate and performs corresponding sealing treatment at the gap to ensure the realization of the function of a negative pressure area, the cavity shell and the negative pressure rotating disc in the utility model are both provided with two parts to complete the bidirectional pulling on the two sides of the film, the interval between the two negative pressure rotating discs is adapted to the width of the film, when the film movement power is not enough to keep the effective work of the tensioning structure, the structures such as a rotating shaft can be arranged under the bearing, the electric furnace is driven by a motor outside the furnace box to provide additional power; simultaneously the position of symmetry with the turbine shell on the slip supporting shoe is equipped with the limiting plate, limiting plate and turbine shell are jointly with tensioning structure card on the position of slot, for making the slip supporting shoe slide more smoothly, a plurality of evenly distributed's ball has been inlayed in the bottom of slip supporting shoe, has effectively reduced sliding friction's frictional resistance, through tensioning structure effectual with the film tensioning when the film gets into the stove case, has effectively reduced the probability that coating surface decorative pattern and crackle appear.

Furthermore, a connecting line of the circle centers of the air holes with the same distance with the circle center of the negative pressure rotating disc on the negative pressure rotating disc is a section of major arc, one side of the turbine shell for exhausting air is provided with an air return pipe, one end of the air return pipe is communicated with the turbine shell, and the other end of the air return pipe is communicated with the normal pressure area. If the film is tensioned continuously by the tensioning structure, the tension of the film is not the problem of tension everywhere, so that the continuous tensioning risks tearing the film, a connecting line of the circle centers of air holes with the same distance with the circle center of the negative pressure rotating disc on the negative pressure rotating disc is an arc on the basis of effectively providing tension adjustment, the damage to the film caused by over-tensioning is avoided through the periodic tension change, the film is slightly pushed upwards through arranging a return air pipe at the position of the negative pressure rotating disc corresponding to the normal pressure area, the film is tensioned in the film moving direction, and the purpose of applying the tension to the film from the transverse direction and the longitudinal direction is achieved.

Furthermore, the waveguide port is arranged at the center of the inner part of the bottom end of the furnace box, space cavities are arranged in the bottom wall of the furnace box and communicated with the waveguide port, an antenna motor is arranged in the space cavities, and the antenna penetrates through the waveguide and is connected with the output end of the antenna motor. When adopting the antenna to launch microwave to the stove incasement, because the shape restriction of antenna for the microwave that it sent distributes inhomogeneously, simultaneously because the utility model belongs to industrial equipment, stove case space volume is great, so strong and weak difference also appears easily in the microwave, and the utility model discloses in set up the waveguide mouth in the inside center of stove bottom end, add simultaneously and establish the antenna motor, make the antenna rotatory evenly launch the stove incasement with microwave, also make the microwave distribution in the stove incasement more even when having strengthened microwave intensity, can also set up a plurality of antennas in the depth direction of stove case and strengthen the microwave intensity in the stove incasement.

Further, be equipped with high-voltage transformer, high-voltage capacitor and high-voltage diode in the microwave generation cavity, high-voltage transformer is connected with the magnetron electricity, high-voltage transformer, high-voltage capacitor and high-voltage diode form voltage doubling rectifier circuit and supply power for the magnetron, microwave generation cavity lateral wall is equipped with a plurality of louvres be equipped with fan motor and fan blade in the microwave generation cavity, fan blade axis of rotation is connected with fan motor's output. The magnetron can be driven only by stable high voltage, the high voltage transformer is arranged outside the equipment, and the use is troublesome; magnetron, high voltage transformer and high voltage diode can produce a large amount of heat energy at the during operation, do not cool off the sustained use that influences the device, the utility model discloses in take place the cavity lateral wall at the microwave and be equipped with a plurality of louvres, take place the cavity at the microwave and be equipped with fan motor and fan blade, fan motor rotates and drives the fan blade and rotate and cool down for equipment, maintenance equipment normal operating, exhaust hot-blast is comparatively high-quality heat source, can be effectual be used for among the heat supply in other stages of product production to the energy saving.

The film-supporting furnace further comprises a heat insulation box, wherein a temperature sensor and a temperature regulator are arranged in the heat insulation box, the heat insulation box is connected with the furnace box, auxiliary narrow slits are formed in the side wall, connected with the furnace box, of the heat insulation box and the side wall opposite to the side wall, the positions of the auxiliary narrow slits correspond to and are communicated with the narrow slits, an air inlet and an air outlet are formed in the heat insulation box, and a plurality of supporting round rollers capable of supporting films are arranged in the heat insulation box. When the film-coating device is used, the film penetrates through the auxiliary narrow slit on the side wall of the insulation box connected with the furnace box to enter the insulation box, and then penetrates through the auxiliary narrow slit on the other side wall of the insulation box to leave the insulation box. At present, after the coating coated on the film is dried by a drying device, the coating is directly exposed in the air, the utility model discloses a person discovers in the actual production process that the film with better coating effect coming out from a drying box can be adhered with other impurities on the coating when the film is arranged, and the impurities can not be removed, so that partial products fall into substandard products, the utility model discloses a person carries out detailed observation on the whole drying process, but the existing coating drying device can dry the coating but still has moisture in the air evaporated after the coating is dried in a furnace box, the coating still has some moist conditions, the coating is solidified in the drying box and can not realize hundred percent drying, and after the coating is heated, the hydrogen bond in the coating can extend the stored energy, the environmental temperature is sharply reduced after the coating comes out from the furnace box, and the hydrogen bond releases energy and shrinks rapidly, the film surface coating is damaged by the heat preservation box, the film enters the heat preservation box after being dried in the furnace box, the air in the heat preservation box is dried, the temperature is kept higher than the room temperature, the coating on the film can be further dried, the quality of the film is further improved, in order to ensure that the temperature gradient of the film in the process of transition from the furnace box to the heat preservation box is not overlarge, a heat release pipe is arranged at an auxiliary narrow gap between the furnace box and the heat preservation box, the heat release pipe is made of non-metal materials such as silicon carbide and the like, the temperature of a heating pipe is set to be the intermediate value of the temperature in the furnace box and the temperature in the heat preservation box, so that the film can have transient temperature transition when passing through the auxiliary narrow gap, the process of the surface temperature reduction of the film is smoother, and the coating quality of the film surface coating is further ensured; the utility model discloses the length and width of well vice slot is all unanimous with the slot, for better describing and understanding, distinguishes specially.

Furthermore, a plurality of narrow slits are arranged on the side wall of the furnace box in parallel, the narrow slits are horizontally arranged and distributed at intervals along the longitudinal direction, a plurality of rotary drum transverse roller assemblies in a rectangular array are arranged in the furnace box, and two ends of each rotary drum transverse roller assembly are fixedly connected with the inner wall of the furnace box respectively and are parallel to the narrow slits. The hot air drying or other equipment drying is adopted, because the condition of the drying method is limited, one production equipment can only dry one layer of film coating, in the utility model, because the microwave has penetrability, the microwave can directly act on water molecules in the coating, the water is dissipated by accelerating the movement of the water molecules to generate heat, simultaneously, because too many structures are not needed to be arranged in the oven box, the proportion of available space in the oven box is larger, and simultaneously, the films arranged in parallel pass through the oven box, the oven box can dry the coating on the films arranged in parallel in multiple layers, the drying efficiency of the equipment is improved, and because the films are arranged in parallel in multiple layers, certain distance is separated between multiple narrow slits, the films arranged in parallel in multiple layers can not be overlapped and attached, and the thickness of the films can not exceed the effective thickness penetrated by the microwave, when the microwave oven is used, the multilayer film respectively penetrates through two narrow slits on the same layer on two side walls of the oven box, so that one device can simultaneously dry the multilayer film, and the production space and energy are saved; the in-process of drying in the stove case of coating on the film, the stove case has certain length, and the film in the stove case can be down concave, and coating on every side will be down towards the depressed part gliding, leads to coating can not evenly distributed on the film, the utility model discloses in be equipped with the horizontal roller subassembly of rotary drum that many levels set up in the stove case, when the film passes the stove case, the horizontal roller subassembly of rotary drum supports the film that lies in the stove case, prevents that the recessed influence coating effect of film is because the utility model relates to a only be the drying process in the film production process, the film is at each production in-process continuous motion, so the utility model discloses in need not consider the power of film motion and provide.

Further, the horizontal roller subassembly of rotary drum includes the fixed axle, the fixed axle both ends respectively with the interior wall connection of stove case, the cover is equipped with the axis pivoted that can wind the fixed axle on the fixed axle and rotates the sleeve, it is equipped with the two-way checkpost with the face contact of rotation telescopic both ends to rotate telescopic top, the top of two-way checkpost is equipped with the slide bar parallel with the fixed axle, the slide bar both ends respectively with the interior wall connection of stove case, the cover is equipped with can be along the gliding sleeve of slide bar on the slide bar, the top that is located the horizontal roller subassembly of rotary drum on top layer is equipped with the disc drive structure, disc drive structure and sleeve fixed connection, be equipped with the adjusting part that can synchronous adjustment between the horizontal roller subassembly of rotary drum. Because the width of the film is limited, under the condition of arranging a plurality of narrow slits, the microwave received by the film in the oven box at different heights is not completely the same due to mutual shielding, in order that the films at different positions receive the microwave which is as uniform as possible, the film is supported by the rotating sleeve, the fixed shaft is arranged to be thin, the interference on the microwave transmission caused by the large volume occupied by the drum transverse roller component is avoided, the two-way clamp is adopted to limit the left and right displacement of the rotating sleeve without influencing the rotation of the rotating sleeve, the sliding rod which is parallel to the fixed shaft is arranged above the two-way clamp, two ends of the sliding rod are respectively connected with the side walls which are adjacent to the side walls where the narrow slits are arranged, the two-way clamp at the same layer is fixedly connected through the clamp connecting rod, when one of the two-way clamps moves, all the two-way clamps at the same layer can be driven to move together, the disc driving structure above the sleeve drives the sleeve to move along the sliding rod, so as to drive the rotating sleeve to move on the fixed shaft, a plurality of balls are embedded between the rotating sleeve and the fixed shaft, the balls enable the rotating sleeve to freely move on the fixed shaft, meanwhile, the position of the film in the oven box can be changed, an adjusting component is arranged between each layer of drum transverse roller component, when a plurality of layers of parallel films are arranged, the positions of the rotating sleeve can be adjusted through the adjusting component, so that the positions of the films in different layers are staggered, the obstruction to microwave transmission is reduced to the maximum extent, the film in the oven box is enabled to be more uniform by the radiation of microwaves, the water molecule dissipation speeds of the films in different positions are kept consistent as much as possible, in order to ensure that the microwaves cannot be leaked from a narrow gap, the narrow gap can be blocked by adopting a plate, and the plate is blocked again after being disassembled when the position of the film, all the parts in the furnace box are made of non-metal materials.

Further, the disc drive structure is including the last disc that is located the stove case top, the last fixed surface of going up the disc is connected with external pole, the below of going up the disc is equipped with down the disc, lower disc is located the stove case, go up the disc and pass through the connecting axle fixed connection that runs through the stove roof wall with the centre of a circle of lower disc, the lower fixed surface of lower disc is connected with the straight-bar of the lower surface of disc under the perpendicular to the straight-bar is located the same axis with external pole, the below of straight-bar is equipped with the long spout with slide bar vertically, the notch of long spout is opened in its upper surface, the lower extreme tip of straight-bar is placed in the notch of long spout and can slide along long spout, the lower surface of long spout with sleeve. The length of the middle-long chute is more than twice of the distance from the straight rod to the center of the lower disc, the disc can rotate completely under the guarantee, the upper disc is rotated to drive the original disc to rotate, the straight rod on the lower disc moves circularly along with the lower disc, and the long chute contains the straight rod to move linearly along the direction perpendicular to the sliding rod, the long chute can move linearly above the sliding rod, because the long chute is fixedly connected with the sleeve, the sleeve moves along the sliding rod direction on the sliding rod along with the movement of the long chute, because the straight rod, the long chute and the sleeve correspond in position, and the external rod and the straight rod are positioned on the same axis, the position of the top layer rotating sleeve can be clearly known through the external rod, and because the inside of no power structure, the adjusting rule of the adjusting assembly on the position of the rotating sleeve is fixed, the positions of all the rotating sleeves can be effectively judged through the positions of the top rotating sleeves, and the tensioning structure can be effectively adjusted to the corresponding positions; the power supply of the upper disc can be manually supplied with power or mechanically driven with power.

Furthermore, the adjusting assembly comprises a guide clamp positioned below the rotating sleeve, the guide clamp is in contact with two end faces of the rotating sleeve of the rotary drum transverse roller assembly on the upper layer, an upper toothed belt is arranged below the guide clamp, the tooth surface of the upper toothed belt faces downwards, the upper surface of the upper toothed belt is fixedly connected with the guide clamp, a lower toothed belt is arranged below the upper toothed belt, the tooth surface of the lower toothed belt faces upwards, the lower surface of the lower toothed belt is fixedly connected with the sleeve of the rotary drum transverse roller assembly on the lower layer, an external gear is arranged between the upper toothed belt and the lower toothed belt, and the upper toothed belt, the external gear and the lower toothed belt are sequentially meshed. When the rotating sleeve on the top layer moves under the action of the disc driving structure, the rotating sleeve pushes the guide clamp to move, the guide clamp drives the upper toothed belt to move so as to push the outer gear to rotate, the outer gear rotates to push the lower toothed belt to move in the direction opposite to the moving direction of the upper toothed belt, the lower toothed belt is fixedly connected with the sleeve of the drum transverse roller assembly on the next layer so as to drive the rotating sleeve on the next layer to move, in the whole moving track, when the rotating sleeves on all layers are overlapped together and mutually staggered, the rotating sleeves can be adjusted according to requirements, for example, when the water content of the coating on the film in the middle layer is less, the film can be overlapped to avoid overheating, if the water content of the coating is the same, the film on each layer can be staggered to avoid the penetration of microblogs, and the side surface of the adjusting assembly can be provided with a baffle plate so as to avoid, the tip about the baffle should only have one end fixed, avoids influencing the motion of going up cingulum and lower cingulum, through adjusting part, can realize only adjusting the rotating sleeve of top layer just can adjust whole rotating sleeve together.

To sum up, compared with the prior art, the utility model has the following beneficial effects:

1. the utility model discloses in, set up the magnetron in the cavity takes place for the microwave, be connected with the waveguide on the transmitting terminal of magnetron, the stove incasement is equipped with the antenna, antenna and waveguide mouth intercommunication, the microwave that the magnetron produced is transmitted the waveguide mouth through the waveguide, both sides wall at the stove case is equipped with the slot, in use, the film passes one of them slot and gets into the stove case, pass another slot again and leave the stove case, the microwave is because there is the hydrone in the coating to the in-process of coating heating, the heat time is fast, make coating quick drying, set up simultaneously tensioning structure and make the coating hydrone evenly scatter and disappear by effective tensioning when making the film get into the drying process, thereby avoid the production of film coating surface line and crackle.

2. The utility model discloses in set up the insulation can, the film gets into the insulation can after the stoving incasement is dried, and air drying can carry out further drying to the coating on the film in the insulation can, realizes the drying of coating hundred per cent, further promotes the goodness of coating film.

3. The utility model discloses in, because the microwave has the penetrability, do not rely on the transmission of medium, the microwave can be directly to the moisture effect in the coating, stove case space is great, multilayer parallel arrangement's film can pass the stove case, the stove case can be dried the coating on multilayer parallel arrangement's film, improve equipment's drying efficiency, during the use, multilayer film passes a plurality of slots that lie in the same layer on the stove case both sides wall respectively, realize that an equipment dries multilayer film simultaneously, saving production space and energy.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. Stir the subassembly place position be located the baffle need open with closed department, the utility model discloses in for the convenience to stir the understanding of subassembly connection relation, stir the subassembly structure with one of them and set up as the reference in the lower horizontal segment of chain gear in the picture, in the drawing:

FIG. 1 is a schematic view of the connection relationship between the drying box and its internal structure;

fig. 2 is a side sectional view of the drying box of the present invention;

FIG. 3 is a side sectional view showing the connection between the middle oven box and the thermal insulation box;

FIG. 4 is a schematic structural view of a multi-layer drum horizontal roller assembly according to the present invention;

FIG. 5 is a schematic view of the connection structure of the drum horizontal roller assembly on the same layer in the present invention;

FIG. 6 is a top view of the middle and long sliding chute of the present invention;

fig. 7 is a side sectional view of the middle tension structure of the present invention;

FIG. 8 is a schematic top view of the film tensioning manner of the tensioning structure of the present invention;

FIG. 9 is a schematic diagram of the inner region of the hollow shell according to the present invention;

the names corresponding to the reference numbers are 1-drying box, 2-supporting column, 3-oven box, 4-microwave generating cavity, 5-magnetron, 6-waveguide, 7-antenna, 8-narrow slit, 9-antenna motor, 10-high voltage transformer, 11-heat preservation box, 12-fan motor, 13-fan blade, 14 air inlet, 15-air outlet, 16-air inlet, 17-air outlet, 18-rotary drum transverse roller component, 19-receiving circular roller, 20-tension structure, 21-driving disc, 22-adjusting component, 1801-rotating sleeve, 1802-fixed shaft, 1803-bidirectional clamp, 1804-slide bar, 1805-sleeve, 1806-clamp connecting rod, 2001-turbine, 2002-constant pressure area, 2003-a cross partition plate, 2004-a negative pressure area, 2005-a sliding support block, 2006-an air pipe, 2007-a turbine shell, 2008-a negative pressure rotating disc, 2009-an air hole, 2010-a cavity shell, 2011-a limit plate, 2012-an air outlet plate, 2013-an air return pipe, 2101-a long chute, 2102-a straight rod, 2103-a lower disc, 2104-an upper disc, 2105-an external rod, 2201-a guide clip, 2202-an upper toothed belt, 2203-an external gear and 2204-a lower toothed belt.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

Example 1:

as shown in fig. 1 to 8, the drying device of a film coating machine in this embodiment includes a drying box 1, a plurality of support pillars 2 are disposed on a bottom surface of the drying box 1, an air inlet 14 and an air outlet 15 are disposed on the drying box 1, the drying box 1 includes a oven box 3 and a microwave generating cavity 4, the oven box 3 is connected to the microwave generating cavity 4, a magnetron 5 is disposed in the microwave generating cavity 4, a waveguide 6 is connected to a transmitting end of the magnetron 5, a waveguide opening is disposed in the oven box 3, an antenna 7 is disposed in the oven box 3, the antenna 7 is communicated with the waveguide opening, the magnetron 5 generates microwaves, the microwaves are transmitted to the waveguide opening through the waveguide 6 and are emitted into the oven box 3 through coupling of the antenna 7, narrow slits 8 are disposed on two opposite side walls of the oven box 3, and a tensioning structure 20 capable of adjusting tension of a film is disposed at the narrow slit 8 at a film inlet, the air inlet 14 is arranged at the bottom surface of the furnace box 3, and the top surface of the furnace box 3 is provided with an air outlet 15; the tensioning structure 20 comprises a sliding support block 2005, the sliding support block 2005 is located on the narrow slit 8, two cavity shells 2010 arranged in the same row are fixedly connected above the sliding support block 2005, the two cavity shells 2010 are symmetrical along the central line of the two cavity shells 2010, an opening is formed in the top of each cavity shell 2010, a negative pressure rotating disc 2008 is arranged above the opening, the edge of each negative pressure rotating disc 2008 is in contact with the end face of the opening of each cavity shell 2010, a plurality of air holes 2009 are formed in the surface of each negative pressure rotating disc 2008, and a cross-shaped partition plate 2003 capable of dividing the interior of each cavity shell 2010 into four independent parts is arranged below each negative pressure rotating disc 2008; establishing a coordinate system by taking a cross separation plate 2003 in a cavity shell 2010 on the left side of a narrow slit 8 as a reference, taking the center of the cross separation plate 2003 as an origin, enabling an x axis to be parallel to the narrow slit 8, enabling a y axis to extend in the positive direction along the moving direction of the film, enabling a negative pressure area 2004 to be formed in the part, located in the first quadrant, of the cavity shell 2010 on the left side of the coordinate system, and enabling a normal pressure area 2002 to be formed in the part, located in the fourth quadrant, of the cavity shell; a turbine shell 2007 is fixedly connected to the side face of the sliding support block 2005 outside the furnace box 3, a turbine fan 2001 is installed in the turbine shell 2007, a vent pipe 2006 is arranged between the turbine shell 2007 and the negative pressure region 2004, the turbine shell 2007 is communicated with the negative pressure region 2004 through the vent pipe 2006, a limit plate 2011 is arranged on one side close to the inside of the furnace box to fix the position of the tensioning structure on the narrow slit 8, a connecting line of the circle centers of the air holes 2009, which are located at the same distance from the circle center of the negative pressure rotating disc 2008, on the negative pressure rotating disc 2008 is a section of major arc, an air return pipe 2013 is arranged on the air exhaust side of the turbine shell 2007, one end of the air return pipe 2013 is communicated with the turbine shell 2007, and.

In this embodiment, the width of the narrow slits 8 is smaller than the width of the oven box 3, the narrow slits 8 on the two side walls of the oven box 3 are on the same horizontal line, when in use, the film passes through one of the narrow slits 8 to enter the oven box 3 and then passes through the other narrow slit 8 to leave the oven box 3, because the cross partition plate in each cavity housing divides the interior of the cavity housing into four independent parts, and the four parts are divided into four quadrants by a coordinate system based on the cross partition plate, as shown in fig. 9, the area a and the area E are negative pressure areas, and the area D and the area H are normal pressure areas, because the film is moving, after the film is adsorbed by the air holes 2009 in the negative pressure area on the negative pressure rotating disk, the film can drive the negative pressure rotating disk 2008 to rotate, and the adsorbed point on the film starts to be pulled outward along the circumference of the negative pressure rotating disk 2008 until the film is finally separated from the negative pressure rotating disk 2008, the purpose of transversely tensioning the film is achieved, meanwhile, an air return pipe 2013 is arranged at an air outlet position of a turbine fan 2001 of a turbine shell 2007, wind power is conveyed to a normal pressure area 2002 through the air return pipe 2013 to be sprayed out through an air hole 2009 of the normal pressure area 2002, the purpose of longitudinally tensioning the film is achieved, a fixed air outlet plate 2012 is arranged between a negative pressure rotating disc 2008 and the normal pressure area 2002, the air outlet plate 2012 completely covers the normal pressure area 2002 and is provided with an arc-shaped notch which is from bottom to top and is increased from bottom to top, the minimum position of the notch is smaller than one third of the diameter of the minimum air hole 2009, the upward thrust on the film is effectively weakened, the notch is increased from bottom to top, the wind power effect is dispersed, the notch only has a partial tensioning effect on the film and cannot push the film away from the surface of the negative pressure rotating disc 2009, the size range of the notch is determined through multiple practical experiments, and meanwhile, the connecting position of the air return pipe, avoid the normal motion of the atmospheric pressure influence film that upwards spun air current produced, the utility model provides a turbofan 2001 adopts the conventional model among the prior art, does not do much here and give unnecessary details, and the microwave realization that gets into in the stove case 3 through the transmission is dried to the coating on the film. In order to make the microwave of launching in the stove case 3 can more even distribution, in this embodiment the waveguide mouth sets up in the inside center in stove case 3 bottom, all is equipped with the blank cavity in stove case 3 diapire, blank cavity and waveguide mouth intercommunication are equipped with antenna motor 9 in the blank cavity, antenna 7 passes waveguide 6 and is connected with antenna motor 9 output.

In order to further facilitate the use of the device, in this embodiment, a high voltage transformer 10, a high voltage capacitor and a high voltage diode are arranged in the microwave generating cavity 4, the high voltage transformer 10 is electrically connected with the magnetron 5, the high voltage transformer 10, the high voltage capacitor and the high voltage diode form a voltage doubling rectifying circuit to supply power to the magnetron 5, and the high voltage transformer 10 is connected with the magnetron 5 by adopting the prior art. In order to maintain the normal operation of the equipment for a long time, in this embodiment, a plurality of heat dissipation holes are formed in the side wall of the microwave generating cavity 4, a fan motor 12 and fan blades 13 are arranged in the microwave generating cavity 4, and the rotating shaft of the fan blades 13 is connected with the output end of the fan motor 13.

In order to facilitate the air inlet and outlet of the oven box 3, in this embodiment, the air inlet 14 is disposed on the bottom surface of the oven box 3, the air outlet 15 is disposed on the top surface of the oven box 3, and in order to prevent the flowing air from affecting the film surface coating when the air enters and exits, cross spoilers are disposed on the air inlet 14 and the air outlet 15 to disperse the air flow, and a baffle is fixed above the cross spoilers of the air inlet 14 to prevent the air flow entering the oven box 3 from blowing the film. In this embodiment, the air outlet provided in the top surface of the oven box 3 is located obliquely above the film in the oven box 3.

The electronic components in the prior art are used as the corresponding electronic components in this embodiment, and redundant description is not repeated here.

Example 2:

as shown in fig. 1 to 9, in addition to embodiment 1, in order to make the present apparatus simultaneously dry a plurality of films coated with a coating, in this embodiment, a plurality of narrow slits 8 are provided on the side wall of the oven box 3, the plurality of narrow slits 8 are provided along the side wall of the oven box 3 in the longitudinal direction, in order to support the films passing through the oven box 3 and prevent the films in the oven box 3 from sinking, the narrow slits 8 are horizontally provided, a plurality of horizontally provided drum transverse roller assemblies 18 are provided in the oven box 3, and both ends of the drum transverse roller assemblies 18 are respectively connected to the side wall adjacent to the side wall where the narrow slits 8 are located.

In this embodiment, a layer of drum transverse roller assembly 18 is arranged below each layer of narrow slit 8, the drum transverse roller assemblies 18 of the same layer are at the same horizontal height, and the drum transverse roller assemblies 18 support the film in the oven 3. The horizontal roller assembly 18 of the rotary drum comprises a fixed shaft 1802, two ends of the fixed shaft 1802 are respectively connected with the adjacent side walls of the narrow slits 8, a rotary sleeve 1801 capable of rotating around the axis of the fixed shaft 1802 is sleeved on the fixed shaft 1802, two-way clamps 1803 in contact with two end faces of the rotary sleeve 1801 are arranged above the rotary sleeve 1801, a slide rod 1804 parallel to the fixed shaft 1802 is arranged above the two-way clamps 1803, two ends of the slide rod 1804 are respectively connected with the adjacent side walls of the narrow slits 8, a sleeve 1805 capable of sliding along the slide rod 1804 is sleeved on the slide rod 1804, a disc driving structure 21 is arranged above the horizontal roller assembly 18 of the rotary drum at the top layer, the disc driving structure 21 is fixedly connected with the sleeve 1805, and an adjusting assembly 22 capable of synchronously adjusting is arranged between the horizontal roller assembly 18 of each layer and the. The bidirectional clamp 1807 is adopted to limit the left and right displacement of the rotating sleeve 1801, but the rotation of the rotating sleeve is not influenced, the disc driving structure 21 comprises an upper disc 2104 positioned above the outer surface of the top of the furnace box 3, an external rod 2105 vertical to the upper surface of the upper disc 2104 is fixedly connected to the upper surface of the upper disc 2104, a lower disc 2103 is arranged below the upper disc 2104, the lower disc 2103 is positioned below the inner wall of the furnace box 3, the circle centers of the upper disc 2104 and the lower disc 2103 are fixedly connected through a connecting shaft penetrating through the top wall of the furnace box 3, a straight bar 2102 vertical to the lower surface of the lower disc 2103 is fixedly connected to the lower surface of the lower disc 2103, the axis of the straight bar is superposed with the axis of the external rod 2105, a long sliding groove 2101 vertical to the sliding rod is arranged below the straight bar 2102, the notch of the long sliding groove 2101 is opened on the upper surface of the long sliding groove 2101, the lower end part of, the lower surface of the long chute 2101 is fixedly connected with the sleeve 1805; the adjusting assembly 22 comprises a guide clip 2201 positioned below a rotating sleeve 1801, the guide clip 2201 is in contact with two end faces of the rotating sleeve 1801 of the drum transverse roller assembly 18 on the upper layer, an upper toothed belt 2202 is arranged below the guide clip 2201, the upper toothed belt 2202 is downward in tooth surface and fixedly connected with the guide clip 2201 on the upper surface, a lower toothed belt 2204 is arranged below the upper toothed belt 2202, the lower toothed belt 2204 is upward in tooth surface and fixedly connected with a sleeve 1805 of the drum transverse roller assembly 18 on the lower layer on the lower surface, an external gear 2203 is arranged between the upper toothed belt 2202 and the lower toothed belt 2204, and the upper toothed belt 2202, the external gear 2203 and the lower toothed belt 2204 are sequentially meshed.

In this embodiment, a corresponding electrical appliance control system is provided to control the apparatus, and the control system is all in the prior art, which is not described herein in detail.

Example 3:

as shown in fig. 1 to 9, in order to further improve the drying degree of the equipment, the present embodiment is further limited to embodiment 1 or embodiment 2, and in the present embodiment, the present embodiment further includes an insulation box 11, a temperature sensor and a temperature regulator are disposed in the insulation box 11, the insulation box 11 is connected to the oven box 3, two opposite side walls of the insulation box 11 are respectively provided with a secondary slit, the secondary slit of one side wall of the insulation box 11 is communicated with the slit 8 of one side wall of the oven box 3, the insulation box 11 is provided with an air inlet 16 and an air outlet 17, and the insulation box 11 is provided with a plurality of receiving round rollers 19 capable of supporting the film. In this embodiment, the air inlet 16 is disposed on the bottom surface of the thermal container 11, and the air outlet 16 is disposed on the top surface of the thermal container 11 and the side wall of the thermal container 11 adjacent to the secondary narrow slit. Insulation can 11 and stove case 3 share a lateral wall, the vice slot on the insulation can 11 lateral wall sets up to many in this embodiment, and many vice slots vertically set up along insulation can 11 lateral walls, the 19 specifications of the round roller of accepting in the insulation can 11 are unified in this embodiment, can effectually accept the film of giving from the stove case 3 internal transport, one of them lateral wall adjacent with vice slot place lateral wall on insulation can 11 can open and shut, and in order to ensure that the film passes through the in-process temperature gradient of insulation can not too big from the stove case, be equipped with the heat release pipe in the vice slot department between stove case and insulation can, the heat release pipe adopts non-metallic material, such as carborundum, etc. sets for the temperature of heating pipe and is the median of the temperature in the stove case and the insulation can.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A film coating machine drying device comprises a drying box (1), wherein a plurality of supporting columns (2) are arranged on the bottom surface of the drying box (1), an air inlet (14) and an air outlet (15) are formed in the drying box (1), the film coating machine drying device is characterized in that the drying box (1) comprises a furnace box (3) and a microwave generating cavity (4), the furnace box (3) is connected with the microwave generating cavity (4), a magnetron (5) is arranged in the microwave generating cavity (4), a waveguide (6) is connected to a transmitting end of the magnetron (5), a waveguide opening is formed in the furnace box (3), an antenna (7) is arranged in the furnace box (3), the antenna (7) is communicated with the waveguide opening, the magnetron (5) generates microwaves, the microwaves are transmitted to the waveguide opening through the waveguide (6), the microwaves are transmitted into the waveguide opening through the coupling of the antenna (7), narrow slits (8) are formed in two opposite side walls of the furnace box (3), the film inlet is provided with a tensioning structure (20) capable of adjusting the tension degree of the film at the narrow slit (8), the air inlet (14) is arranged on the bottom surface of the furnace box (3), and the top surface of the furnace box (3) is provided with an air outlet (15).

2. The film coating machine drying device according to claim 1, wherein the tensioning structure (20) comprises a sliding support block (2005), the sliding support block (2005) is located on the narrow slit (8), two cavity shells (2010) arranged in the same row are fixedly connected above the sliding support block (2005), the two cavity shells (2010) are symmetrical along the central line of the two cavity shells, an opening is formed in the top of each cavity shell (2010), a negative pressure rotating disc (2008) is arranged above the opening, the edge of each negative pressure rotating disc (2008) is in contact with the end face of the opening of each cavity shell (2010), a plurality of air holes (2009) are formed in the surface of each negative pressure rotating disc (2008), and a cross-shaped partition plate (2003) capable of dividing the interior of each cavity shell (2010) into four independent parts is arranged below each negative pressure rotating disc (2008); establishing a coordinate system by taking a cross separation plate (2003) in a cavity shell (2010) on the left side of the narrow slit (8) as a reference, taking the center of the cross separation plate (2003) as an origin, enabling an x axis to be parallel to the narrow slit (8), enabling a y axis to extend along the film moving direction in a positive direction, enabling a negative pressure area (2004) to be formed in the part, located in the first quadrant, of the coordinate system of the cavity shell (2010) on the left side, and enabling a normal pressure area (2002) to be formed in the part, located in the fourth quadrant, of the coordinate system of the cavity; the side surface of the sliding support block (2005) outside the furnace box (3) is fixedly connected with a turbine shell (2007), a turbine fan (2001) is installed in the turbine shell (2007), a vent pipe (2006) is arranged between the turbine shell (2007) and the negative pressure area (2004), and the vent pipe (2006) is used for communicating the turbine shell (2007) with the negative pressure area (2004).

3. The drying device of the film coating machine as claimed in claim 2, wherein a connecting line of the centers of the air holes (2009) on the negative pressure rotating disc (2008) with the same distance from the center of the negative pressure rotating disc (2008) is a section of major arc, an air return pipe (2013) is arranged on the exhaust side of the turbine housing (2007), one end of the air return pipe (2013) is communicated with the turbine housing (2007), and the other end of the air return pipe (2013) is communicated with the normal pressure region (2002).

4. The drying device of the film coating machine as claimed in claim 1, wherein the waveguide port is arranged at the center of the inside of the bottom end of the oven box (3), a space cavity is arranged in the bottom wall of the oven box (3), the space cavity is communicated with the waveguide port, an antenna motor (9) is arranged in the space cavity, and the antenna (7) penetrates through the waveguide (6) and is connected with the output end of the antenna motor (9).

5. The drying apparatus of film coating machine according to claim 1, wherein a high voltage transformer (10), a high voltage capacitor and a high voltage diode are disposed in the microwave generating cavity (4), the high voltage transformer (10) is electrically connected to the magnetron (5), the high voltage transformer (10), the high voltage capacitor and the high voltage diode form a voltage doubling rectifying circuit for supplying power to the magnetron (5), a plurality of heat dissipating holes are disposed on the side wall of the microwave generating cavity (4), a fan motor (12) and a fan blade (13) are disposed in the microwave generating cavity (4), and the rotating shaft of the fan blade (13) is connected to the output end of the fan motor (12).

6. The drying device of the film coating machine according to claim 1, further comprising an insulation box (11), wherein a temperature sensor and a temperature regulator are arranged in the insulation box (11), the insulation box (11) is connected with the furnace box (3), a side wall of the insulation box (11) connected with the furnace box (3) and a side wall opposite to the side wall are provided with auxiliary narrow slits, the auxiliary narrow slits correspond to and are communicated with the narrow slits (8), the insulation box (11) is provided with an air inlet (16) and an air outlet (17), and a plurality of bearing round rollers (19) capable of supporting the film are arranged in the insulation box (11).

7. The drying device of the film coating machine as claimed in claim 1, wherein a plurality of narrow slits (8) are arranged on the side wall of the oven box (3) in parallel, the narrow slits (8) are horizontally arranged and distributed at intervals along the longitudinal direction, a plurality of drum transverse roller assemblies (18) in a rectangular array are arranged in the oven box (3), and two ends of each drum transverse roller assembly (18) are fixedly connected with the inner wall of the oven box (3) respectively and are parallel to the narrow slits (8).

8. The drying device of the film coating machine as claimed in claim 7, wherein the drum transverse roller assembly (18) comprises a fixed shaft (1802), two ends of the fixed shaft (1802) are respectively connected with the inner wall of the oven box (3), a rotating sleeve (1801) capable of rotating around the axis of the fixed shaft (1802) is sleeved on the fixed shaft (1802), a bidirectional clamp (1803) contacted with two end faces of the rotating sleeve (1801) is arranged above the rotating sleeve (1801), a sliding rod (1804) parallel to the fixed shaft (1802) is arranged above the bidirectional clamp (1803), two ends of the sliding rod (1804) are respectively connected with the inner wall of the oven box (3), a sleeve (1805) capable of sliding along the sliding rod (1804) is sleeved on the sliding rod (1804), a disc driving structure (21) is arranged above the drum transverse roller assembly (18) at the top layer, and the disc driving structure (21) is fixedly connected with the sleeve (1805), an adjusting component (22) which can be synchronously adjusted is arranged between the transverse roller component (18) of the rotary drum of each layer and the transverse roller component (18) of the rotary drum of the next layer.

9. The film coating machine drying device according to claim 8, wherein the disc driving structure (21) comprises an upper disc (2104) located above the oven box (3), the upper surface of the upper disc (2104) is fixedly connected with an external rod (2105), a lower disc (2103) is arranged below the upper disc (2104), the lower disc (2103) is located in the oven box (3), the circle centers of the upper disc (2104) and the lower disc (2103) are fixedly connected through a connecting shaft penetrating through the top wall of the oven box (3), a straight rod (2102) perpendicular to the lower surface of the lower disc (2103) is fixedly connected to the lower surface of the lower disc (2103), the straight rod (2102) and the external rod (2105) are located on the same axis, a long chute (2101) perpendicular to the sliding rod (1804) is arranged below the straight rod (2102), the straight rod of the long chute (2101) is arranged on the upper surface of the straight chute (2101), the straight rod (2102) is arranged in the chute (2101) at the lower end of the long chute and can slide along the long chute (2101), the lower surface of the long sliding groove (2101) is fixedly connected with the sleeve (1805).

10. The film coater drying apparatus as set forth in claim 8 wherein the adjustment assembly (22) includes a guide catch (2201) located below the rotating sleeve (1801), the guide clamp (2201) is in contact with two end faces of a rotating sleeve (1801) of the drum transverse roller assembly (18) on the upper layer, an upper toothed belt (2202) is arranged below the guide clamp (2201), the toothed surface of the upper toothed belt (2202) faces downwards and the upper surface of the upper toothed belt is fixedly connected with the guide clamp (2201), a lower toothed belt (2204) is arranged below the upper toothed belt (2202), the toothed surface of the lower toothed belt (2204) faces upwards and the lower surface of the lower toothed belt is fixedly connected with a sleeve (1805) of the drum transverse roller assembly (18) on the lower layer, an external gear (2203) is arranged between the upper toothed belt (2202) and the lower toothed belt (2204), and the upper toothed belt (2202), the external gear (2203) and the lower toothed belt (2204) are sequentially meshed.