Shaking powder dryer

Abstract

A kind of shake powder dryer, including frame, shake powder area, drying area;In shake powder area, the L-shaped clamping piece of the powder outlet of powder storage box is symmetrically provided below;The spacing between L-shaped clamping piece adjustment can control the discharge range of hot melt adhesive powder of powder outlet, indirectly control the arrangement density of hot melt adhesive;The powder shaking rod of relatively independent activity can form a low point to PET film, and form a certain accumulation at low point;Powder shaking rod can shake off the excess hot melt adhesive powder on PET film;With the turnover of PET film and the action of powder shaking rod, the hot melt adhesive powder on PET film at low point repeatedly evenly covers PET film to supplement hot melt adhesive powder;In this way, the hot melt adhesive powder on PET film in shake powder area is not lost and has excess, and the hot melt adhesive powder on PET film reaching drying area is evenly appropriate;In drying area, the suction film cavity has downward adsorption force to PET film, so that it passes through the heating cavity below tightly and stably with uniform speed;Front and rear smoke baffle will isolate smoke;Smoke suction cavity, with the help of suction fan suction force, sends smoke to filter chamber for filtration, and finally harmless gas is discharged outside the frame.

Description

Technical Field

[0001] This invention relates to the technical field of heat transfer printing, and in particular to a powder drying machine. Background Technology

[0002] Heat transfer printing is a common printing process that extends beyond paper to include a wide variety of products, such as clothing, fabric bags, hats, cushions, mugs, tiles, watches, mouse pads, coasters, calendars, medals, and pennants. It is particularly suitable for producing small-batch, high-variety, personalized and customized products, as well as printing patterns containing full-color images or photographs. The pattern carrier used in heat transfer printing is a heat transfer film. The quality of the heat transfer film directly affects the quality of the transferred pattern. Currently, the most widely used heat transfer film substrate is PET film, also known as high-temperature resistant polyester film. The PET film first receives a release agent and ink at the printer. The ink then transfers the pattern onto the PET film. The release agent helps the ink detach from the PET film and bond with the product during heat transfer. The release agent and ink mixture is easily affected by external interference, which can damage the pattern printed by the ink. To protect the pattern, a hot melt adhesive film needs to be added to the surface of the pattern as a protective film, and the pattern needs to be dried and heated to a certain extent to remove excess moisture from the release agent and ink mixture, making its structure more stable. Existing technology has designed a powder shaking machine for this purpose. The front end of the powder shaking machine places hot melt adhesive powder on the surface of the PET film, and the rear end heats the surface of the PET film to melt the hot melt adhesive powder and remove excess moisture from the release agent and ink. However, existing powder shaking machines cannot guarantee that the hot melt adhesive powder on the surface of the PET film is evenly distributed and in appropriate amounts, resulting in uneven thickness of the hot melt adhesive film, which makes the heat transfer pattern blurry. In addition, heating the surface of the PET film can easily cause the ink and release agent to produce fumes, which are harmful to the human body. Summary of the Invention

[0003] The purpose of this invention is to solve the above-mentioned problems and provide a powder drying machine.

[0004] The technical solution of the present invention is: a powder shaking dryer includes a frame, a powder shaking area disposed at the front end of the frame, and a drying area connected to the rear end of the frame;

[0005] The top, bottom, left, and right sides of the frame are all enclosed;

[0006] The powder-dispensing area is equipped with a powder storage component, a powder distribution rod, and a powder dispensing rod arranged sequentially according to the flow path of the PET film;

[0007] The powder storage component includes a powder storage box, a horizontal spiral rod, a powder outlet screen, and L-shaped clips; the bottom of the powder storage box includes an outer end inclined surface, a middle plane, and an inner end inclined surface; the horizontal spiral rod is arranged above the inner end inclined surface and is rotatably connected through the side surface of the powder storage box; a powder outlet is provided in the middle of the middle plane; the powder outlet screen is tightly matched and adhered below the powder outlet; the powder outlet screen is threadedly connected to the box body of the powder storage box through symmetrically arranged L-shaped clips and screws; the L-shaped clips are provided with adjustment long holes perpendicular to the L-shaped clamping plates corresponding to the screws; the powder storage box is connected to the machine frame; the PET film passes below the powder outlet;

[0008] The powder spreading rod is connected to the upper surface of the PET film and includes rotating covers at both ends and a thin rod connecting the centers of the two rotating covers; a step is provided on the inner end surface of the rotating cover; the distance between the steps of the two rotating covers matches the width of the PET film;

[0009] The powder vibrating rod is in the shape of a "middle" character, and the rotation radiation range intersects with the walking route of the PET film;

[0010] The drying area includes a drying cover, a transfer belt arranged up and down, a filter chamber connected to the drying cover, and a blower corresponding to the transfer belt; the PET flows through the transfer belt and turns to the rear end of the machine frame;

[0011] The drying cover is arranged directly above the transfer belt, and a heating chamber is provided in the middle; a number of cooling fans are evenly distributed at the rear end of the heating chamber; a number of heating lamps are horizontally arrayed in the heating chamber; front and rear smoke baffles are respectively provided at the front and rear ends of the heating chamber; a smoking chamber is provided above the heating chamber; a number of smoking holes communicating with the heating chamber are densely distributed on the bottom surface of the smoking chamber, and a downward smoking port is provided at the end; a smoking pipeline corresponding to the smoking port is connected to the bottom of the filter chamber; a suction fan is provided at the top of the filter chamber; the input end of the suction fan is connected to the inside of the filter chamber, and the output end is connected to the outside of the machine frame;

[0012] The transfer belt is densely provided with suction film grids, and suction film chambers are provided at both ends close to the inner side surface of the upper part of the transfer belt; a number of suction film holes are evenly distributed on the upper surface of the suction film chamber; a downward suction film pipeline is provided at the end of the suction film chamber; the suction film pipeline is connected to the input end of the blower; the output end of the blower is connected to the outside of the machine frame. ​​​​​​​​​​​​​The vertical powder conveying assembly runs through the transfer box and includes an outer tube and a vertical spiral rod inside the rotating sleeve of the outer tube. The top of the outer tube is horizontal with the powder storage box and has a vertical outlet for entering the powder storage box. The bottom of the outer tube rests against the bottom of the transfer box and has a vertical inlet for the corresponding scraper belt to enter the transfer box. The bottom of the vertical spiral rod is rotatably connected to the bottom of the transfer box and the top is rotatably connected to the top of the outer tube.

[0018] Preferably, the front end of the drying cover is provided with a hinge; the drying cover is connected to the frame via the hinge.

[0019] Preferably, the front smoke baffle is rotatably connected to the frame.

[0020] Preferably, the horizontal spiral rod is driven and connected to a powder equalization motor at its end; the powder shaking rod is driven and connected to a powder shaking motor; the active powder conveying wheel is driven and connected to a horizontal powder conveying motor; the vertical spiral rod is driven and connected to a lifting motor; the drying cover is equipped with a telescopic rod; one end of the telescopic rod is connected to the drying cover, and the other end is connected to the machine frame.

[0021] Preferably, the opening of the heating chamber is covered with a protective mesh.

[0022] Preferably, a temperature probe protruding from the heating chamber is provided inside the heating chamber.

[0023] Preferably, the smoke inlets are symmetrically arranged about the frame; the film suction pipes are symmetrically arranged at both ends of the film suction chamber.

[0024] The beneficial effects of this invention are as follows: The powder-shaking dryer of this invention includes a frame, a powder-shaking zone, and a drying zone; within the powder-shaking zone, L-shaped clamps are symmetrically arranged below the powder outlet of the powder storage box; the spacing between the L-shaped clamps can be adjusted to control the discharge range of hot melt adhesive powder from the powder outlet, indirectly controlling the distribution density of the hot melt adhesive; the relatively independently movable powder-shaking rod can create troughs in the PET film and accumulate a certain amount of hot melt adhesive powder in the troughs; the powder-shaking rod can shake off excess hot melt adhesive powder from the PET film; as the PET film flows and the powder-shaking rod moves, the hot melt adhesive powder on the PET film in the troughs repeatedly and evenly covers the PET film to replenish the hot melt adhesive powder; thus, the hot melt adhesive powder on the PET film in the powder-shaking zone is neither excessive nor insufficient, achieving a uniform and appropriate amount of hot melt adhesive powder on the PET film in the drying zone; within the drying zone, the suction chamber has a downward adsorption force on the PET film, causing it to adhere tightly to the conveyor belt and pass through the heating chamber at a steady speed; the front and rear smoke baffles isolate the smoke; the smoke chamber, with the help of the suction fan, sends the smoke to the filter chamber for filtration, and finally, the harmless gas is discharged outside the frame. Attached Figure Description

[0025] Figure 1 This is a perspective view of the powder drying machine of the present invention;

[0026] Figure 2 This is a side view of the present invention with one side panel removed;

[0027] Figure 3 yes Figure 2 AA section view;

[0028] Figure 4 It's a three-dimensional fan zone. Figure 1 ;

[0029] Figure 5 It's a three-dimensional fan zone. Figure 2 ;

[0030] Figure 6 yes Figure 4 Top view;

[0031] Figure 7 yes Figure 6 BB cross-sectional view;

[0032] Figure 8 yes Figure 7 A magnified view of the I-shaped image;

[0033] Figure 9 yes Figure 7 II magnified view;

[0034] Figure 10 It is a 3D diagram of an L-shaped clip;

[0035] Figure 11 yes Figure 7 CC section view;

[0036] Figure 12 It is a sectional perspective view of the connection between the vertical powder conveying component and the transfer box;

[0037] Figure 13 It is a 3D diagram of the powder roller;

[0038] Figure 14 It's a 3D image of a powder shaker;

[0039] Figure 15 It is a three-dimensional drying zone Figure 1 ;

[0040] Figure 16 It is a three-dimensional drying zone Figure 2 ;

[0041] Figure 17 It is a 3D view of the drying cover and the front and rear smoke baffles;

[0042] Figure 18 yes Figure 17 Vertical sectional view;

[0043] Figure 19 It is a 3D view of the drying cover after the protective netting has been removed, along with the front and rear smoke baffles;

[0044] Figure 20It is a three-dimensional diagram of the transfer belt and the suction chamber;

[0045] Figure 21 yes Figure 20 Top view;

[0046] Figure 22 yes Figure 21 CC section view;

[0047] in, Figure 18 , Figure 19 The direction of the middle arrow indicates the direction of airflow;

[0048] In the diagram: 00. PET film, 1. Frame, 2. Powder shaking area, 211. Powder storage box, 2111. Outer end bevel, 21111. Straight vibrator, 2112. Middle plane, 21121. Powder outlet, 2113. Inner end bevel, 212. Horizontal spiral rod, 2121. Powder equalization motor, 213. Powder outlet screen, 214. L-shaped clamp, 2141. Adjustment elongated hole, 215. Guide plate, 22. Powder distribution rod, 221. Rotating cover, 2211. Step, 222. Thin rod, 23. Powder shaking rod, 231. Powder shaking motor, 24. V-shaped bin, 251. Scraper belt, 2511. Flexible scraper, 252. Active powder conveying wheel, 2521. Horizontal powder conveying motor, 253. Passive powder conveying wheel 261. Outer tube; 2611. Vertical outlet; 2612. Vertical inlet; 262. Vertical spiral rod; 2621. Lifting motor; 27. Transfer box; 3. Drying zone; 31. Drying cover; 311. Heating chamber; 3111. Heating lamp; 3112. Smoke vent; 3113. Protective net; 3114. Temperature probe; 312. Cooling fan; 313. Smoke chamber; 3131. Smoke outlet; 3132. Smoke duct; 314. Hinge; 315. Telescopic rod; 32. Transfer belt; 321. Suction chamber; 3211. Suction hole; 3212. Suction duct; 322. Front smoke baffle; 323. Rear smoke baffle; 33. Filter chamber; 331. Suction fan; 34. Fan. Detailed Implementation

[0049] Example: See Figure 1-22 A powder-dispensing dryer includes a frame, a powder-dispensing zone located at the front end of the frame, and a drying zone connected to the rear end of the frame. The powder-dispensing zone is mainly used to evenly and appropriately distribute powder onto the PET film. The drying zone is mainly used to heat the PET film to form a hot melt adhesive layer, while simultaneously expelling fumes generated by ink and release agent.

[0050] The top, bottom, left, and right sides of the frame are all enclosed, serving as the base for installing the powder-dispersing area and the drying area;

[0051] The powder-dispensing area is equipped with a powder storage component, a powder distribution rod, and a powder dispensing rod arranged sequentially according to the flow path of the PET film;

[0052] The powder storage component includes a powder storage box, a horizontal spiral rod, a powder outlet screen, and L-shaped clips; the bottom of the powder storage box includes an outer end slope, a middle plane, and an inner end slope; the outer end slope and the inner end slope incline towards the middle plane, making the hot melt adhesive powder on it tend to slide towards the middle slope; since there is an openable door above the outer end slope, the hot melt adhesive powder on the outer end slope can be added by opening this door, or the sliding of the hot melt adhesive powder on the outer end slope can be interfered by opening this door; correspondingly, the horizontal spiral rod is arranged above the inner end slope and is rotatably connected through the side of the powder storage box; the rotation of the horizontal spiral rod can interfere with the sliding of the hot melt adhesive powder on the inner end slope; there is a powder outlet in the middle of the middle plane for discharging the hot melt adhesive powder; a powder outlet screen is tightly matched below the powder outlet to ensure that the discharged hot melt adhesive powder is evenly discharged; the powder outlet screen is threadedly connected to the powder storage box body through symmetrically arranged L-shaped clips and screws; the L-shaped clips are provided with adjustment long holes perpendicular to the L-shaped clamping plates corresponding to the screws; the relative position of the L-shaped clips can be adjusted through the adjustment long holes to control the discharge range of the hot melt adhesive powder, and finally adjust the arrangement density of the discharged hot melt adhesive powder; the powder storage box is connected to the frame; the PET film passes below the powder outlet and receives the discharged hot melt adhesive powder;

[0053] The powder spreading rod is connected to the upper surface of the PET film and includes rotating covers at both ends and a thin rod connecting the centers of the two rotating covers; the upper surface of the PET film is also the surface for receiving the release agent and ink; there are steps on the inner end surfaces of the rotating covers; the distance between the steps of the two rotating covers matches the width of the PET film; in this way, the two rotating covers support the PET film vertically through the thin rod and form a trough when falling; when the PET film enters or leaves this trough, the excess hot melt adhesive powder will enter the trough; the operation of the PET film will cause the hot melt adhesive powder and the powder spreading rod in the trough to roll continuously and be evenly arranged in the width direction of the PET film; those areas of the PET film that do not receive enough hot melt adhesive powder can supplement the hot melt adhesive powder here; the rolling action of the powder spreading rod will increase the rolling amplitude of the hot melt adhesive powder, and the supplementary effect of the hot melt adhesive powder is better;

[0054] The powder shaking rod is in a "middle" shape, and the rotation radiation range intersects with the walking route of the PET film; the rotating powder shaking rod continuously knocks off the excess hot melt adhesive powder on the PET film, so that the hot melt adhesive powder on the PET film is reduced to an appropriate amount;

[0055] The drying area includes a drying cover, a transfer belt arranged up and down, a filter chamber connected to the drying cover, and a fan corresponding to the transfer belt; the PET passes through the transfer belt and flows towards the rear end of the frame;

[0056] The drying cover is positioned directly above the conveyor belt, with a heating chamber in the center. Several heating lamps are arranged horizontally within the heating chamber. The heating chamber heats the PET film through radiant heat from these lamps, causing the hot melt adhesive powder to melt and excess moisture from the release agent and ink to evaporate. Several cooling fans are evenly distributed at the rear of the heating chamber. The PET film leaving the heating chamber is cooled by these fans, accelerating the formation of the hot melt adhesive layer. Front and rear baffles are located at the front and rear ends of the heating chamber, respectively, forming a relatively enclosed exhaust space in conjunction with the frame. A fume extraction chamber is located at the top of the heating chamber. The bottom surface of the fume extraction chamber is densely covered with several fume extraction holes communicating with the heating chamber, and the end has a downward-facing fume extraction port. A fume extraction pipe corresponding to the fume extraction port is connected to the bottom of the filter chamber. A suction fan is located at the top of the filter chamber. The input end of the suction fan connects to the inside of the filter chamber, and the output end connects to the outside of the frame. Thus, the suction fan provides airflow, and the smoke generated by the heated ink and release agent passes sequentially through the heating chamber, fume extraction holes, fume extraction chamber, fume extraction port, and fume extraction pipe to reach the filter chamber. After being purified in the filter chamber, the clean air is exhausted outside the frame by the suction fan.

[0057] The conveyor belt is densely covered with a film-absorbing mesh, and both ends have film-absorbing cavities that are tightly attached to the upper inner side of the conveyor belt. Several film-absorbing holes are evenly distributed on the upper surface of each film-absorbing cavity. A downward-facing film-absorbing pipe is located at the end of each film-absorbing cavity. The film-absorbing pipe connects to the input end of a fan, and the output end of the fan connects to the outside of the frame. In this way, the fan provides airflow, which, through the film-absorbing pipe, causes the film-absorbing holes in the film-absorbing cavity to exert suction on the PET film through the film-absorbing mesh, ensuring that the PET film adheres tightly to the conveyor belt and moves at a uniform speed. Here, the PET film has a certain isolation effect on smoke, and the smoke itself rises when heated; the film-absorbing holes do not draw in smoke.

[0058] Several linear vibrators are connected to the bottom of the outer inclined surface; in this embodiment, there are two. The linear vibrators generate a force that drives the hot melt adhesive powder on the outer inclined surface to slide down evenly.

[0059] Below the powder distribution rod and the powder shaking rod is a V-shaped chamber connected to the frame, which collects excess hot melt adhesive powder from the powder shaking area. The V-shaped structure of the V-shaped chamber can concentrate the collected hot melt adhesive powder in one place for easy processing. A guide plate facing the V-shaped chamber is provided on the lower outer side of the powder outlet to guide the hot melt adhesive powder discharged from the powder outlet and drive it to flow into the V-shaped chamber.

[0060] The fan-sharing area is also equipped with horizontal fan-carrying components, vertical fan-carrying components, and transfer boxes;

[0061] The horizontal powder conveying assembly is horizontally positioned at the bottom of the V-shaped bin, including a scraper belt, an active powder conveying wheel, and a passive powder conveying wheel; several flexible scrapers are evenly distributed vertically on the outer surface of the scraper belt; one end of the scraper belt enters the transfer box; the flexible scrapers can scrape the hot melt adhesive powder collected in the V-shaped bin into the transfer box;

[0062] The vertical powder conveying assembly runs through the transfer box and includes an outer tube and a vertical spiral rod inside the rotating outer tube. The top of the outer tube is horizontal with the powder storage box and has a vertical outlet for entering the powder storage box. The bottom of the outer tube rests against the bottom of the transfer box and has a vertical inlet corresponding to the scraper belt entering the transfer box. The bottom of the vertical spiral rod is rotatably connected to the bottom of the transfer box and the top is rotatably connected to the top of the outer tube. The hot melt adhesive powder entering the transfer box is spirally lifted by the vertical spiral rod through the vertical inlet and finally enters the powder storage box through the vertical outlet.

[0063] The drying cover has a hinge at the front end; the drying cover is connected to the frame via the hinge; because the gap between the drying cover and the conveyor belt is small, the PET film head end is difficult to pass through; the hinge at the front end of the drying cover can lift the drying cover to make room for the PET film head end to pass through first.

[0064] The front fume baffle is rotatably connected to the frame, which can both enclose the space and allow the PET film tip to pass through.

[0065] The horizontal spiral rod is driven by a powder-leveling motor; the powder-shaking rod is driven by a powder-shaking motor; the active powder-conveying wheel is driven by a horizontal powder-conveying motor; the vertical spiral rod is driven by a lifting motor; the drying cover is equipped with a telescopic rod; one end of the telescopic rod is connected to the drying cover, and the other end is connected to the frame; in this way, the rotation of the horizontal spiral rod, the rotation of the powder-shaking rod, the flow of the scraper belt, the rotation of the vertical spiral rod, and even the lifting of the drying cover can all be controlled electrically, facilitating their coordinated operation.

[0066] A protective mesh is placed over the heating chamber opening to prevent the PET film from getting too close to the heating lamp and overheating.

[0067] A temperature probe protruding from the heating chamber is installed inside the heating chamber to monitor the heating temperature of the PET film.

[0068] The smoke inlets are symmetrically arranged about the frame to even out the heat of the smoke and prevent structural damage caused by uneven heating in certain areas. The suction pipes are symmetrically arranged at both ends of the suction chamber to make the suction force generated by the suction chamber more even.

[0069] The working process of this embodiment:

[0070] The PET film flows within the powder-discharging area: hot melt adhesive powder is added through the opening above the inclined surface of the powder storage box; due to the vibration of the vertical vibrator below, the hot melt adhesive powder continuously slides evenly down the inclined surface towards the central plane, and then exits through the powder outlet on the central plane; at the powder outlet, the powder discharging mesh intercepts the hot melt adhesive powder, ensuring its even discharge; adjusting the spacing of the L-shaped clamps controls the discharge range of the hot melt adhesive powder, thus adjusting the density of the discharged hot melt adhesive powder; most of the hot melt adhesive powder discharged from the powder outlet falls onto the PET film, and a small portion falls onto... The hot melt adhesive powder falling onto the guide plate and V-shaped compartment is bounced back and thrown onto the V-shaped compartment and PET film. Because the powder distribution rod only contacts the PET film, the PET film entering the V-shaped compartment automatically droops to form a trough. The hot melt adhesive powder entering the V-shaped compartment and PET film accumulates in this trough. In this trough, as the PET film flows, the dynamics of the powder distribution rod itself cause the PET film in the trough to swing back and forth, so that the hot melt adhesive powder is evenly dispersed in the width direction of the PET film, and then repeatedly covered with PE. The T-film replenishes hot melt adhesive powder to areas of the PET film that have not received sufficient hot melt adhesive powder. Of course, there will still be excess hot melt adhesive powder accumulating and falling from both sides of the PET film to the bottom of the V-shaped bin. The PET film in the trough of the flow point will be hit by the powder shaking rod, so that the excess hot melt adhesive powder on the PET film will be shaken off and enter the bottom of the V-shaped bin. At the same time, the impact on the PET film can be converted into the PET film in the trough swinging back and forth. The hot melt adhesive powder that reaches the bottom of the V-shaped bin is scraped by the flexible scraper on the scraper belt and transported to the transfer box. The hot melt adhesive powder entering the transfer box is lifted by a vertical screw rod into the powder storage box and then enters the inner inclined surface. The hot melt adhesive powder entering the inner inclined surface is then evenly distributed on the inner inclined surface by the action of a horizontal screw rod. Finally, with the help of the inclination angle of the inner inclined surface and the power provided by the horizontal screw rod, it moves towards the central plane and is finally discharged from the powder outlet again, forming a cycle. The above process includes the recycling of hot melt adhesive powder and its even and appropriate distribution on the PET film. The PET film with the even and appropriate distribution of hot melt adhesive powder continues to flow into the drying zone.

[0071] The PET film flows within the drying zone: PET film is lightweight, and the suction chamber, through suction holes and the mesh of the transfer belt, adsorbs the PET film. Under this adsorption force, the PET film is in close contact with the transfer belt, allowing it to pass stably and uniformly through the heating chamber below, receiving even heat. The heat radiation released by the heating lamps in the heating chamber heats the PET film, drying excess moisture from the ink and release agent while melting the hot melt adhesive powder to form a hot melt adhesive layer. This hot melt adhesive layer is then cooled by a cooling fan, allowing for rapid setting. The fumes generated by the heated ink and release agent are blocked by front and rear baffles and the side walls of the enclosed frame. A suction fan draws the fumes through the filter chamber, filtering them through the smoke inlet, smoke chamber, and smoke duct. The filtered, harmless gases are then expelled from the frame by the suction fan. Throughout this process, the suction chamber and protective mesh prevent the PET film from getting too close to the heating lamps and suffering heat damage.

Claims

1. A duster dryer characterized by, The machine frame, the powder shaking area arranged at the front end of the machine frame, and the drying area connected with the tail end of the machine frame are included. The top surface, bottom surface, left side and right side of the machine frame are closed. The powder shaking area is sequentially provided with a powder storage assembly, a powder distribution rod and a powder shaking rod according to the flow path of the PET film. The powder storage assembly includes a powder storage box, a horizontal screw rod, a powder outlet net and an L-shaped clamping piece. The bottom of the powder storage box includes an outer inclined surface, a middle flat surface and an inner inclined surface. The horizontal screw rod is arranged above the inner inclined surface and is rotatably connected through the side surface of the powder storage box. The middle flat surface is provided with a powder outlet port in the middle. The powder outlet net is matched with the powder outlet port. The powder outlet net is threadedly connected with the powder storage box through the symmetrically arranged L-shaped clamping piece and screw.

2. The duster dryer of claim 1, wherein: The L-shaped clamping piece is provided with a vertical long hole corresponding to the screw.

3. The duster dryer of claim 1, wherein: The powder storage box is connected with the machine frame.

4. The duster dryer of claim 3, wherein: The PET film passes below the powder outlet port. The powder distribution rod is in contact with the upper surface of the PET film and includes two rotating covers and a thin rod connecting the centers of the two rotating covers. The inner end surface of the rotating cover is provided with a step.

5. The duster dryer of claim 1, wherein: The distance between the steps of the two rotating covers is matched with the width of the PET film.

6. The duster dryer of claim 4, wherein: The powder shaking rod is in the shape of a Chinese character "zhong" and the rotating radiation range intersects with the running path of the PET film. The drying area includes upper and lower drying covers, a transfer belt, a filtering chamber connected with the drying covers, and a fan corresponding to the transfer belt. The PET film flows to the tail end of the machine frame through the transfer belt. The drying cover is arranged above the transfer belt and is provided with a heating cavity in the middle. A plurality of cooling fans are uniformly arranged at the rear end of the heating cavity. A plurality of heating lamps are arranged in the heating cavity in a horizontal array. The front and rear ends of the heating cavity are respectively provided with front and rear smoke blocking plates. The upper part of the heating cavity is provided with a smoke suction cavity. The bottom surface of the smoke suction cavity is densely provided with a plurality of smoke suction holes connected with the heating cavity. The end part of the smoke suction cavity is provided with a downward smoke suction port. The bottom part of the filtering chamber is connected with a smoke suction pipeline corresponding to the smoke suction port. The top part of the filtering chamber is provided with a smoke suction fan. The input end of the smoke suction fan is connected with the inside of the filtering chamber, and the output end is connected with the outside of the machine frame. The transfer belt is densely provided with a film suction grid, and the two ends are provided with a film suction cavity closely attached to the inner side surface of the upper part of the transfer belt. The upper surface of the film suction cavity is uniformly provided with a plurality of film suction holes. The end part of the film suction cavity is provided with a downward film suction pipeline. The film suction pipeline is connected with the input end of the fan. The output end of the fan is connected with the outside of the machine frame. A plurality of straight vibrators are connected to the bottom of the outer inclined surface. The powder distribution rod and the powder shaking rod are provided with a V-shaped bin connected with the machine frame below. A flow guide inclined plate is arranged below the outer side of the powder outlet port and faces the V-shaped bin. The powder shaking area is further provided with a horizontal powder conveying assembly, a vertical powder conveying assembly and a transfer box. The horizontal powder conveying assembly is horizontally arranged at the bottom end of the V-shaped bin and includes a scraper belt, a driving powder conveying wheel and a driven powder conveying wheel. A plurality of flexible scrapers are vertically and uniformly arranged on the outer surface of the scraper belt. One end of the scraper belt enters the transfer box. The vertical powder conveying assembly penetrates through the transfer box and includes an outer sleeve and a vertical screw rod rotatably sleeved in the outer sleeve. The top end of the outer sleeve is horizontally arranged at the powder storage box and is provided with a vertical outlet entering the powder storage box. The bottom end of the outer sleeve is arranged on the bottom part of the transfer box and is provided with a vertical inlet corresponding to the part of the scraper belt entering the transfer box. The bottom end of the vertical screw rod is rotatably connected with the bottom part of the transfer box, and the top end is rotatably connected with the top end of the outer sleeve. The front end of the drying cover is provided with a hinge. The drying cover is connected with the machine frame through the hinge. The front smoke blocking plate is rotatably connected with the machine frame.

7. A duster dryer as claimed in any of claims 4 or 6, characterised in that: The horizontal screw rod end is connected with a uniform powder motor in transmission; the powder shaking rod is connected with a powder shaking motor in transmission; the driving powder conveying wheel is connected with a horizontal powder conveying motor in transmission; the vertical screw rod is connected with a lifting motor in transmission; the drying cover is provided with a telescopic rod; one end of the telescopic rod is connected with the drying cover, and the other end is connected with the rack.

8. The duster dryer of claim 1, wherein: The heating cavity is covered with a protective net.

9. The duster dryer of claim 1, wherein: A temperature probe is arranged in the heating cavity and extends out of the heating cavity.

10. The duster dryer of claim 1, wherein: The smoking port is symmetrically arranged relative to the rack; and the film suction pipeline is symmetrically arranged at two ends of the film suction cavity.

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