Drying chamber capable of heating up and down
Through the design of the drying room with upper and lower heating, the curved topped conveyor belt and bidirectional heating pipe are used to solve the problem of uneven color fixation of the inner and outer layers of the printing medium, achieving uniform color fixation effect and improving printing quality.
Patent Information
- Application Number
- CN202411212781.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-07-22
AI Technical Summary
In the existing drying room, the color fixation effect of the surface and inner layers of the printing media is uneven, resulting in the inner layer of the printing media not being completely fixed, affecting the printing quality.
The drying room design is designed with upper and lower heating, and the arc-shaped top-up conveyor belt is used to replace the negative pressure suction mesh belt. The heating pipe A and the heating pipe B are heated simultaneously from above and below the printing medium, combining the air heat transfer and negative pressure suction system in the sealed box to ensure that the inner and outer layers of the printing medium are heated at the same time.
It realizes the simultaneous heating of the inner and outer layers of the printing medium, improves the color fixation effect, ensures that the printing powder and ink on the surface and inner layers of the printing medium are uniformly fixed, and improves the printing quality.
Smart Images
Figure CN120348079A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of parts of a powder shaking machine, and particularly to a drying chamber with upper and lower heating. Background Art
[0002] The drying chamber is a part of the powder shaking machine that thermally fuses the printed powder and the printing medium. Usually, the drying chamber is arranged behind the powder spreading chamber of the powder shaking machine. After the powder spreading chamber evenly spreads the printing medium with powder, ensuring the effective combination of the printed powder on the printing medium, the printing medium covered with the printed powder is heated by means of thermal radiation, etc., so that the printed powder melts into a transparent layer above the printing medium, and the moisture of the ink on the printing medium is evaporated, and the printed pattern on the printing medium is fixed. Therefore, the powder shaking machine is also called a fixing machine. The conventional powder shaking chamber includes a heating box on the upper part and a mesh belt conveyor line on the lower part; the inside of the mesh belt conveyor line is in a negative pressure state, adsorbing the printing medium above the mesh belt to ensure that the formed transparent layer has a uniform thickness; the heating box is provided with heating tubes and a smoke exhaust passage; the heating tubes generate thermal radiation to heat the printed powder; the smoke exhaust passage has a negative pressure suction force to discharge the harmful gases generated by heating. The heat transferred by the heating box to the printing medium is in the downward direction; therefore, the printed powder and ink on the surface layer of the printing medium receive heat first, and the printing medium and ink on the inner layer of the printing medium receive heat later. This easily results in a situation where the surface of the printing medium has been fixed, while the inner layer of the printing medium has not been fixed yet. Summary of the Invention
[0003] The purpose of the present invention is to solve the above problems and provide a drying chamber with upper and lower heating.
[0004] The technical solution of the present invention is: a drying chamber with upper and lower heating includes a heating box and a conveyor belt; both ends of the conveyor belt abut against the side walls of the powder shaking machine; several heating tubes A are evenly distributed along the bottom of the heating box at the bottom of the heating box; the heating tubes A are heat sources that generate radiant heat downward; a smoke exhaust cavity communicating with the bottom of the heating box is arranged inside the heating box; the smoke exhaust cavity is used to discharge the harmful gases generated by heating; in order to make up for the lack of negative pressure suction inside the conveyor belt, the conveyor belt is provided with an arc top; the top of the arc top abuts against the inner wall of the conveyor belt to ensure that the printing medium is closely attached to the conveyor belt when being heated and dried by the heating box; the printing medium can evenly bear the heat energy conveyed by the heating box; several horizontal heating tubes B are arranged below the arc top; the heating tubes B heat the arc top and then transfer heat to the printing medium through the arc top.
[0005] Preferably, a U-shaped shell is arranged at the bottom of the arc top; the bottom end of the arc top is hermetically connected to the top of the U-shaped shell; the U-shaped shell and the arc top form a sealed box body; the heating tubes B are arranged in this sealed box body; the air in the sealed box body is heated and also participates in the heat transfer to the arc top, which can ensure that the arc top is evenly heated, thereby ensuring the drying effect.
[0006] Preferably, the front end of the heating box is connected to the side wall of the powder shaking machine through a hinge; a horizontal handle is provided at the rear end of the heating box; workers can lift the heating box upward to adjust the printing medium on the conveyor belt to ensure that the printing medium on the conveyor belt is in a flat state in the initial state.
[0007] Preferably, the bottom of the heating box is an arc surface matching the arc top, so that the distribution of heating tube A conforms to the arc top to ensure the drying effect; in addition, the arc surface also has the effect of gathering the flue gas.
[0008] Furthermore, a number of smoke exhaust holes are densely arranged at the center of the bottom of the heating box; the smoke exhaust holes are communicated with the smoke exhaust cavity; the gathered flue gas directly enters the smoke exhaust cavity from the smoke exhaust holes.
[0009] Preferably, communication channels A communicated with the smoke exhaust cavity are symmetrically arranged on both sides of the heating box; the communication channels A penetrate through the bottom of the heating box; communication channels B corresponding and matching with the communication channels A are arranged on both sides of the conveyor belt; when the heating box is buckled above the conveyor belt, the communication channels A are communicated with the communication channels B; the communication channels B are L-shaped and lead to the lower part of the conveyor belt, and can discharge the flue gas to the purifier built in the powder shaking machine; the built-in purifier provides negative pressure suction for the communication channels A and the communication channels B.
[0010] Preferably, a mesh belt is selected for the conveyor belt, which is beneficial to heat transfer.
[0011] Preferably, the drying chamber with upper and lower heating further includes a suction roller, a suction chamber and a guiding plate arranged at the front end of the conveyor belt; the suction roller is rotatably connected to the side wall of the powder shaking machine; suction holes are densely arranged on the side wall of the suction roller; the end of the suction chamber is fixedly connected to the side wall of the powder shaking machine; the side wall of the suction chamber is attached to the suction roller; a negative pressure interface is provided at the bottom of the suction chamber; the negative pressure interface is connected to an external negative pressure air source; the negative pressure interface generates negative pressure air flow, and generates negative pressure suction on the printing medium through the suction holes and the gap between the suction roller and the wall of the suction chamber to ensure that the printing medium remains flat before entering the conveyor belt; the main body of the guiding plate is in a horizontal state; both ends of the guiding plate are respectively placed on the upper part of the conveyor belt and the side of the suction roller; the guiding plate safely guides the printing medium onto the conveyor belt.
[0012] Furthermore, the side wall of the suction chamber close to the conveyor belt abuts against the bottom of the guiding plate; negative pressure air flow also exists in the gap between the suction chamber and the guiding plate, further ensuring that the printing medium enters the conveyor belt smoothly.
[0013] Preferably, the drying chamber with upper and lower heating further includes a tensioning mechanism; the tensioning mechanism is arranged below the arc-shaped top and includes a vertical plate and a lower pressing strip fixedly connected to the side wall of the powder shaking machine; several adjusting holes are vertically arranged on the vertical plate; the lower pressing strip abuts against the inner wall of the lower part of the conveyor belt; both ends of the lower pressing strip are connected to the adjusting holes by screws; by selecting the adjusting holes connected to the screws, the vertical height of the lower pressing strip can be changed, and then the tension degree of the conveyor belt can be changed to ensure that the upper part of the conveyor belt is in a tight state, which is beneficial to the drying effect of the drying chamber.
[0014] Preferably, the drying chamber with upper and lower heating further includes a fan group arranged horizontally; the fan group is arranged below the rear end of the conveyor belt; the fan group is inclined downward; the fan group cools the printing medium discharged from the drying chamber to ensure the color fixing effect.
[0015] The beneficial effects of the present invention are as follows: The drying chamber with upper and lower heating of the present invention has the following advantages: (1) The present invention uses a conveyor belt lifted by an arc-shaped top to replace a mesh belt with negative pressure suction, which can ensure the flatness of the printing medium; heating pipe A and heating pipe B transfer heat to the printing medium from above and below the printing medium respectively, so that the printing powder and ink on the inner layer and surface layer of the printing medium are heated simultaneously, ensuring the color fixing effect of the drying chamber; (2) The air in the sealed box body of the present invention is heated and also participates in the heat transfer to the arc-shaped top, which can ensure the uniform heating of the arc-shaped top and thus ensure the drying effect; (3) The suction holes and the gaps between the suction rollers and the wall of the suction chamber of the present invention generate negative pressure suction on the printing medium to ensure that the printing medium remains flat before entering the conveyor belt. Description of the Drawings
[0016] Figure 1 is a perspective view of the drying chamber with upper and lower heating of the present invention; Figure 2 is Figure 1 the side view of Figure 3 is Figure 2 the A-A cross-sectional view of Figure 4 is Figure 2 the B-B cross-sectional view of Figure 5 is Figure 3 the C-C cross-sectional view of Figure 6 is Figure 4 the D-D cross-sectional view of Figure 7 is Figure 4 the E-E cross-sectional view of Figure 8 is a perspective view of the heating box; Figure 9It is a physical photo of the present invention; In the figure: 1. Heating box, 11. Heating pipe A, 12. Smoke exhaust cavity, 13. Smoke exhaust hole, 14. Communication channel A, 15. Smoke exhaust channel, 16. Gas spring, 2. Conveyor belt, 21. Arc top, 22. Heating pipe B, 23. U-shaped housing, 24. Communication channel B, 25. Driving roller, 31. Hinge, 32. Handle, 41. Suction roller, 411. Suction hole, 42. Suction chamber, 421. Negative pressure interface, 43. Guide plate, 51. Vertical plate, 511. Adjustment hole, 52. Pressing strip, 6. Fan group, 71. Reduction gear set, 72. Motor. Specific embodiments
[0017] Embodiment 1: Refer to Figures 1-8 , a drying chamber with upper and lower heating includes a heating box 1 and a conveyor belt 2; both ends of the conveyor belt 2 abut against the side wall of the powder shaking machine; several heating pipes A 11 are arranged at the bottom of the heating box 1 and are evenly distributed along the bottom of the heating box 1; there are 4 heating pipes A 11 in this embodiment; the heating pipe A 11 is a heat source that generates radiant heat downward; a smoke exhaust cavity 12 communicating with the bottom of the heating box 1 is arranged inside the heating box 1; the smoke exhaust cavity 12 is used to discharge harmful gases generated by heating; in order to make up for the lack of negative pressure suction inside the conveyor belt 2, the conveyor belt 2 is provided with an arc top 21; the top of the arc top 21 abuts against the inner wall of the conveyor belt 2 to ensure that the printing medium is closely attached to the conveyor belt 2 when being heated and dried by the heating box 1; the printing medium can evenly bear the heat energy conveyed by the heating box 1; several horizontal heating pipes B 22 are arranged below the arc top 21; there are 4 heating pipes B 22 in this embodiment; the heating pipe B 22 heats the arc top 21 and then transfers heat to the printing medium through the arc top 21.
[0018] Compared with the prior art, the present invention uses the conveyor belt 2 lifted by the arc top 21 to replace the mesh belt with negative pressure suction, which can ensure the flatness of the printing medium; the heating pipe A 11 and the heating pipe B 22 transfer heat to the printing medium from above and below the printing medium respectively, so that the printing powder and ink on the inner layer and the surface layer of the printing medium are heated simultaneously, ensuring the color fixation effect of the drying chamber.
[0019] A U-shaped housing 23 is arranged at the bottom of the arc top 21; the bottom end of the arc top 21 is hermetically connected to the top of the U-shaped housing 23; the U-shaped housing 23 and the arc top 21 form a sealed box body; the heating pipe B 22 is arranged in this closed box body; the air in the closed box body is heated and also participates in the heat transfer to the arc top 21, which can ensure that the arc top 21 is evenly heated and further ensure the drying effect.
[0020] The front end of the heating box 1 is connected to the side wall of the powder shaking machine through a hinge 31; a horizontal handle 32 is arranged at the rear end of the heating box 1; workers can lift the heating box 1 upward to adjust the printing medium on the conveyor belt 2 to ensure that the printing medium on the conveyor belt 2 is in a flat state in the initial state.
[0021] Both sides of the heating box 1 are connected to the side wall of the powder shaking machine through gas springs 16 to assist the worker in the upward lifting action.
[0022] The bottom of the heating box 1 is an arc surface matching the arc top 21, so that the distribution of the heating pipe A 11 conforms to the arc top 21 to ensure the drying effect; in addition, the arc surface also has the effect of gathering the flue gas.
[0023] A number of exhaust holes 13 are densely arranged at the center of the bottom of the heating box 1; the exhaust holes 13 are communicated with the exhaust cavity 12; the gathered flue gas directly enters the exhaust cavity 12 from the exhaust holes 13.
[0024] On both sides of the heating box 1, communication channels A 14 communicated with the exhaust cavity 12 are symmetrically arranged; the communication channels A 14 penetrate through the bottom of the heating box 1; on both sides of the conveyor belt 2, communication channels B 24 corresponding and matching with the communication channels A 14 are arranged; when the heating box 1 is buckled above the conveyor belt 2, the communication channels A 14 are communicated with the communication channels B 24; the communication channels B 24 are L-shaped and lead to the lower part of the conveyor belt 2, and can discharge the flue gas to the purifier built in the powder shaking machine; the built-in purifier provides negative pressure suction for the communication channels A 14 and the communication channels B 24.
[0025] The conveyor belt 2 is selected as a mesh belt, which is beneficial to the transfer of heat.
[0026] The center of the exhaust cavity 12 is communicated with an exhaust passage 15, which can be connected to an external purifier; the external purifier provides negative pressure suction for the exhaust passage 15.
[0027] The working process in this embodiment includes the following steps: ① Adjust the printing medium on the conveyor belt 2 The worker lifts the handle 32, lifts the heating box 1 to expose the upper part of the conveyor belt 2 and the printing medium on the upper part of the conveyor belt 2; sorts out the printing medium to make it flat on the upper part of the conveyor belt 2; during the adjustment, the gas spring 16 replaces human power to support the printing box, facilitating the adjustment operation by the worker; after the adjustment is completed, close the heating box 1 to connect the communication channels A 14 and the communication channels B 24. ② The heating box 1 dries Start the conveyor belt 2 to make the printing medium pass successively under the heating box 1; the upper part of the conveyor belt 2 is in a convex state due to the upward top of the arc top 21; the printing medium on the upper part of the convex conveyor belt 2 can keep in close contact with the upper part of the conveyor belt 2, thus ensuring that the printing medium will not generate new wrinkles and affect the color fixation effect; at the same time, power on the heating pipe A 11 and the heating pipe B 22, so that the heating pipe A 11 radiates heat downward and directly shines on the surface of the printing medium on the upper part of the conveyor belt 2; the heating pipe B 22 radiates heat upward and directly shines on the arc top 21; the arc top 21 is heated, and rapid heat transfer occurs, so that the temperature of each part of the entire arc top 21 rises evenly; the arc top 21 with evenly rising temperature acts on the back of the printing medium through the conveyor belt 2 to heat the printing powder and ink on the inner layer of the printing medium; the printing powder and ink on the inner and outer layers of the printing medium are heated simultaneously, which can improve the color fixation effect of the powder shaking machine.
[0028] Embodiment 2: Embodiment 2 is basically the same as Embodiment 1, and the same parts will not be described again. The differences are as follows: The drying chamber with upper and lower heating also includes a suction roller 41, a suction chamber 42 and a guiding plate 43 arranged at the front end of the conveyor belt 2; the suction roller 41 is rotatably connected to the side wall of the powder shaking machine; the side wall of the suction roller 41 is densely provided with suction holes 411; the end of the suction chamber 42 is fixedly connected to the side wall of the powder shaking machine; the side wall of the suction chamber 42 is in contact with the suction roller 41; a negative pressure interface 421 is provided at the bottom of the suction chamber 42; the negative pressure interface 421 is connected to an external negative pressure air source; the negative pressure interface 421 generates a negative pressure air flow, and generates a negative pressure suction force on the printing medium through the suction holes 411 and the gap between the suction roller 41 and the wall of the suction chamber 42 to ensure that the printing medium remains flat before entering the conveyor belt 2; the main body of the guiding plate 43 is in a horizontal state; both ends of the guiding plate 43 are respectively placed on the upper part of the conveyor belt 2 and the side of the suction roller 41; the guiding plate 43 safely guides the printing medium onto the conveyor belt 2.
[0029] The side wall of the suction chamber 42 close to the conveyor belt 2 abuts against the bottom of the guiding plate 43; there is also a negative pressure air flow in the gap between the suction chamber 42 and the guiding plate 43, which further ensures that the printing medium enters the conveyor belt 2 smoothly.
[0030] The drying chamber with upper and lower heating also includes a tensioning mechanism; the tensioning mechanism is arranged under the arc top 21 and includes a vertical plate 51 and a pressing strip 52 fixedly connected to the side wall of the powder shaking machine; a number of adjustment holes 511 arranged vertically are provided on the vertical plate 51; the pressing strip 52 abuts against the inner wall of the lower part of the conveyor belt 2; both ends of the pressing strip 52 are connected to the adjustment holes 511 by screws; by selecting the adjustment holes 511 connected to the screws, the vertical height of the pressing strip 52 is changed, and then the tension of the conveyor belt 2 is changed to ensure that the upper part of the conveyor belt 2 is in a tight state, which is beneficial to the drying effect of the drying chamber.
[0031] The up-and-down heated drying chamber further includes a horizontally arranged fan group 6; the fan group 6 is arranged below the rear end of the conveyor belt 2; the fan group 6 is arranged obliquely downward; the fan group 6 cools the printing medium discharged from the drying chamber to ensure the color fixation effect.
[0032] One end of the conveyor belt 2 is provided with a driving roller 25; both the driving roller 25 and the air suction roller 41 are connected with a motor 72 through a reduction gear group 71 at their ends; the rotation speeds of the conveyor belt 2 and the air suction roller 41 are controlled, and a better cooperation effect can be produced.
Claims
1. A drying chamber with upper and lower heating, comprising a heating box and a conveyor belt; both ends of the conveyor belt abut against the side walls of the powder shaking machine; a number of heating tubes A are evenly distributed along the bottom of the heating box at the bottom of the heating box; a smoke exhaust cavity communicating with the bottom of the heating box is arranged inside the heating box; it is characterized in that, The conveyor belt is provided with an arc-shaped top; the top of the arc-shaped top abuts against the inner wall of the conveyor belt; several horizontal heating pipes B are arranged below the arc-shaped top.
2. The up-and-down heated drying chamber according to claim 1, characterized in that: The bottom of the arc-shaped top is provided with a U-shaped housing; the bottom end of the arc-shaped top is hermetically connected to the top of the U-shaped housing; the U-shaped housing and the arc-shaped top form a sealed box body; the heating pipe B is arranged in the sealed box body.
3. The up-and-down heated drying chamber according to claim 1, characterized in that: The bottom of the heating box is an arc-shaped surface matching the arc-shaped top.
4. The up-and-down heated drying chamber according to claim 3, characterized in that: A number of smoke exhaust holes are densely arranged at the center of the bottom of the heating box; the smoke exhaust holes are communicated with the smoke exhaust cavity.
5. The drying chamber with upper and lower heating according to claim 1, characterized in that: Two symmetrical communication channels A communicated with the smoke exhaust cavity are arranged on both sides of the heating box; the communication channel A penetrates through the bottom of the heating box; communication channels B corresponding and matching with the communication channel A are arranged on both sides of the conveyor belt; the communication channel B is L-shaped and leads to the lower part of the conveyor belt.
6. The up-and-down heated drying chamber according to claim 1, characterized in that: The conveyor belt is selected as a wire mesh belt.
7. The up-and-down heated drying chamber according to claim 1, wherein: It further includes a suction roller, a suction bin and a guiding plate arranged at the front end of the conveyor belt; the suction roller is rotatably connected to the side wall of the powder shaking machine; the side wall of the suction roller is densely provided with suction holes; the end of the suction bin is fixedly connected to the side wall of the powder shaking machine; the side wall of the suction bin is attached to the suction roller; a negative pressure interface is arranged at the bottom of the suction bin; the negative pressure interface is connected to an external negative pressure air source; the main body of the guiding plate is in a horizontal state; both ends of the guiding plate are respectively placed on the upper part of the conveyor belt and the side of the suction roller.
8. The up-and-down heated drying chamber according to claim 7, wherein: The side wall of the suction bin close to the conveyor belt abuts against the bottom of the guiding plate.
9. The up-and-down heating drying chamber according to claim 1, characterized in that: It further includes a tensioning mechanism; the tensioning mechanism is arranged below the arc-shaped top and includes a vertical plate and a pressing strip fixedly connected to the side wall of the powder shaking machine; a number of vertically arranged adjusting holes are provided on the vertical plate; the pressing strip abuts against the inner wall of the lower part of the conveyor belt; both ends of the pressing strip are connected to the adjusting holes by screws.
10. The up-and-down heating drying chamber according to claim 1, wherein: It further includes a fan group arranged horizontally; the fan group is arranged below the rear end of the conveyor belt; the fan group is inclined downward.