Casting machine drying oven structure with upper drying tunnel capable of blowing air horizontally

Abstract

The utility model discloses a casting machine drying oven structure with an upper drying tunnel capable of blowing air horizontally, which comprises the upper drying tunnel and a lower drying tunnel, a parallel air circulation processing device is arranged in the upper drying tunnel, and the distribution of the parallel air circulation processing device covers the whole length of the upper drying tunnel; the parallel air circulating treatment devices are arranged above and below the steel belt, or are only arranged above the steel belt; the parallel air circulation treatment device comprises a parallel air duct air inlet part and a parallel air duct air outlet part which are oppositely arranged; in the lower drying tunnel, a longitudinal air circulation processing device is at least arranged below the steel belt, and the air direction of the longitudinal air circulation processing device is adjustable. According to the scheme, the upper drying channel corresponding to the initial heating stage of the film slurry adopts the parallel air channel to blow the preheating air, so that the surface of the film slurry begins to harden and air flow is ensured, and the hot air is prevented from directly blowing towards the film surface of the film slurry to influence the film quality; and subsequently, hot air can be blown in the lower drying channel in a manner of basically facing the film surface, so that the efficiency and effect of heating and evaporating the solvent are ensured.

Description

Technical Field

[0001] This utility model belongs to the field of casting machine technology, specifically relating to a casting machine oven structure with a flat blowing air in the upper drying tunnel. Background Technology

[0002] A casting machine is a type of thin film manufacturing equipment that heats the cast film slurry, evaporates the solvent, and initially hardens the film surface by blowing hot air through an drying tunnel. Existing technologies, such as the Chinese utility model patent with authorization publication number CN207888872U, employ a slit nozzle on one side of the film belt, with the airflow direction perpendicular to the length of the drying tunnel and directly facing the film surface. The hot air outlet method has a significant impact on film quality, especially for current high-end films, as this existing direct airflow can affect the film thickness uniformity. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a casting machine oven structure with flat air blowing in the upper drying tunnel, which solves the problem that the existing solution is not conducive to the uniformity of film thickness. Based on the film condition, different air outlet methods are adopted in the upper and lower drying tunnels to achieve better drying effect while meeting the high-quality requirements for film thickness distribution.

[0004] According to the technical solution of this utility model, this utility model provides a casting machine oven structure with a top drying tunnel and a bottom drying tunnel, including an upper drying tunnel and a lower drying tunnel. A parallel air circulation treatment device is provided in the upper drying tunnel, and the distribution of the parallel air circulation treatment device covers the entire length of the upper drying tunnel. The parallel air circulation treatment device is located above and below the steel belt, or only above the steel belt. The parallel air circulation treatment device includes a parallel air duct inlet and a parallel air duct outlet arranged opposite to each other. In the lower drying tunnel, a longitudinal air circulation treatment device is provided at least below the steel belt, and the air direction of the longitudinal air circulation treatment device is adjustable.

[0005] Furthermore, a pair of parallel air duct inlets and outlets arranged opposite each other constitute a set of parallel air circulation treatment devices; only one set of parallel air circulation treatment devices is provided in the upper drying tunnel, or two or more sets of parallel air circulation treatment devices are arranged sequentially along the length direction in the upper drying tunnel.

[0006] Furthermore, two or more sets of parallel air circulation treatment devices are arranged sequentially along the length direction in the upper drying tunnel, and / or two or more sets of longitudinal air circulation treatment devices are arranged sequentially along the length direction in the lower drying tunnel; in the length direction of the upper and lower drying tunnels, each set of parallel air circulation treatment devices and longitudinal air circulation treatment devices is located in an independent temperature zone.

[0007] Furthermore, each temperature zone is divided by a partition, and the partition has a connecting opening in the middle. A negative pressure air curtain device is installed at the connecting opening. The negative pressure air curtain device includes a first exhaust section and a second exhaust section arranged opposite each other, and a channel space is formed between the first exhaust section and the second exhaust section for the steel belt to pass through.

[0008] Furthermore, parallel air duct flow equalization plates and / or air regulating plates are provided at both the air inlet and air outlet of the parallel air duct.

[0009] Furthermore, the air outlet of the parallel air duct is located near the entrance of the upper drying duct, while the air inlet of the parallel air duct is relatively far from the entrance of the upper drying duct, and the air inlet and outlet of the parallel air duct are arranged opposite to each other.

[0010] Furthermore, an active roller temperature zone is provided on one side of the upper and lower drying tunnels, and a passive roller temperature zone is provided on the other side. The passive roller temperature zone is equipped with a far-infrared heating device or a ceramic heating device. According to the above-described structure of the casting machine oven with flat air blowing in the upper drying tunnel, the oven body is characterized by having an oven exhaust port near the side partitions and / or on the side wall parallel to the partitions.

[0011] Furthermore, an air inlet is provided on the side wall of the box perpendicular to the partition.

[0012] Furthermore, an explosion vent is provided in the upper drying tunnel.

[0013] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0014] In the casting machine oven structure of the present invention, a parallel air duct is used to blow preheating air in the upper drying tunnel corresponding to the initial stage of film slurry heating, so that the surface of the film slurry begins to harden and air flow is ensured, while avoiding hot air blowing directly onto the film surface and affecting film quality; subsequently, hot air is blown in the lower drying tunnel in a manner that is basically directly facing the film surface, ensuring the efficiency and effect of heating and solvent evaporation. Attached Figure Description

[0015] Figure 1 This is a cross-sectional structural schematic diagram of a casting machine according to an embodiment of the present invention.

[0016] Figure 2 This is a cross-sectional structural schematic diagram of a casting machine according to another embodiment of the present utility model.

[0017] Figure 3 yes Figure 2 The diagram shows a top view of the casting machine in the embodiment shown.

[0018] Figure 4 This is a three-dimensional structural diagram of a negative pressure air curtain device according to an embodiment of the present utility model.

[0019] Figure 5 yes Figure 4 The rear view of the negative pressure air curtain device in the embodiment shown is a schematic diagram.

[0020] Figure 6 yes Figure 4 The left view of the negative pressure air curtain device in the embodiment shown is a schematic diagram.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Upper drying tunnel; 2. Lower drying tunnel; 3. Parallel air duct static pressure box; 31. Parallel air duct outlet; 32. Parallel air duct inlet; 4. Longitudinal air circulation treatment device; 5. Negative pressure air curtain device; 51. First exhaust section; 52. Second exhaust section; 53. Air curtain flow equalization plate; 54. Channel space; 55. Channel side plate; 56. Slit baffle; 57. First airtight air box; 58. Second airtight air box; 59. First exhaust pipe; 510. Second exhaust pipe; 61. Oven exhaust port; 62. Oven inlet; 63. Explosion vent; 71. Active rotating drum; 72. Passive rotating drum; 81. Active rotating drum chamber; 82. Passive rotating drum chamber. Detailed Implementation

[0023] This invention provides a casting machine oven structure with a flat air blowing function in the upper drying tunnel, which solves the problem that existing solutions are not conducive to the uniformity of film thickness. Based on the film conditions, different air outlet methods are designed for the upper and lower drying tunnels to achieve better drying effect while meeting the high-quality requirements for film thickness distribution.

[0024] Please see Figure 1 , Figure 2Similar to existing technologies, the casting machine includes an active drum 71, a passive drum 72, and a steel belt that drives the drums. The two ends of the oven body are an active drum chamber 81 and a passive drum chamber 82, corresponding to the active drum 71 and the passive drum 72, respectively. The steel belt is located inside the oven, which has an upper drying channel 1 and a lower drying channel 2 corresponding to the steel belt, thereby drying the film slurry on the steel belt. In some embodiments of the casting machine oven structure with an upper drying channel and flat air blowing, a parallel air circulation treatment device is provided in the upper drying channel 1. The parallel air circulation treatment device is at least located above the steel belt (the film slurry is also located above the steel belt in this area), specifically, the parallel air circulation treatment device is located above and below the steel belt, or only above the steel belt. The parallel air circulation treatment device includes a parallel air duct inlet 32 ​​and a parallel air duct outlet 31 arranged opposite each other, thereby blowing preheating air in a direction generally parallel to the steel belt. The distribution of the parallel air circulation treatment device covers the entire length of the upper drying tunnel 1, so that all or at least most of the areas in the upper drying tunnel have parallel airflow. In the lower drying tunnel 2, a longitudinal air circulation treatment device 4 is provided at least below the steel belt. Specifically, the longitudinal air circulation treatment device 4 is provided above and below the steel belt, or only below the steel belt. Preferably, the airflow direction of the longitudinal air circulation treatment device 4 is adjustable; in other words, the longitudinal air circulation treatment device 4 has an outlet that can adjust the airflow direction. The longitudinal air circulation treatment device 4 is used to blow air generally toward the film surface, for example, by using a nozzle-type static pressure box, whose nozzle can be oriented upward or obliquely upward, or its direction can be adjusted so that the nozzle airflow direction is directly or slightly inclined toward the film, and preferably can be adjusted according to actual needs.

[0025] Taking polyimide film as an example, a mixer is used to uniformly mix the main material, polyamic acid resin, and the auxiliary material, imidizing agent. Then, the mixed slurry is output from the mold at the discharge end of the mixer onto the steel belt at the active drum 71 of the casting machine. The slurry moves, heats, evaporates the solvent, and gradually begins to solidify into a film as the steel belt rotates. Finally, after nearly one revolution, it is peeled off from the steel belt at the active drum 71 by a peeling roller; this process continues. Specifically, using… Figure 1For example, the film slurry first drips onto the upper right position of the annular steel belt. Then, as the steel belt moves counterclockwise, it first enters the upper drying tunnel 1 area where the parallel air circulation treatment device is located. This area is used for preheating and pre-evaporation, and to give the film surface a certain hardness. The purpose of using a parallel air duct is to ensure some airflow in this area, so that the surface of the film slurry (wet film) begins to harden, while avoiding hot air blowing directly onto the film surface and avoiding affecting the uniformity of the film thickness distribution. Subsequently, the film enters the lower drying tunnel 2 area with the longitudinal air circulation treatment device 4. At this point, the film surface is hard enough to withstand the hot air without significant deformation. Therefore, hot air is blown roughly directly onto the film surface to transfer heat more directly and efficiently and accelerate solvent evaporation. At the same time, as needed, a blowing method that is not completely directly onto the film surface can be selected at least locally, but with a certain tilt angle, so that the blowing of hot air and its impact on the film surface are relatively gentler.

[0026] More specifically, a pair of parallel air duct inlets 32 and parallel air duct outlets 31 arranged opposite each other constitute a set of parallel air circulation processing devices. "Matching" means that a pair of inlets and outlets are directly opposite each other, with the air path between them directly connected; in other words, they are the closest pair of inlets and outlets facing opposite directions. In some embodiments, only one set of parallel air circulation processing devices is provided in the upper drying tunnel 1, for example... Figure 1 As shown; or, in other embodiments, two or more sets of parallel air circulation processing devices are arranged sequentially along the length direction in the upper drying tunnel 1, for example... Figure 2 As shown. It is understandable that this paper mainly emphasizes the improvement of airflow mode in the direction of movement of the membrane and steel belt. The parallel air circulation treatment device and the longitudinal air circulation treatment device 4 in the width direction of the steel belt can be in one row or multiple rows side by side, and can be designed and selected according to specific circumstances.

[0027] The parallel air circulation treatment device preferably adopts a static pressure box structure. The parallel air duct inlet 32 ​​and the parallel air duct outlet 31 are both located on the parallel air duct static pressure box 3. A parallel air duct flow equalization plate is provided at both the parallel air duct inlet 32 ​​and the parallel air duct outlet 31. The flow equalization plate is, for example, a porous flat plate; thereby ensuring the uniformity of parallel air and preheating effect.

[0028] In a preferred embodiment, in the parallel air circulation processing device, the parallel air duct outlet 31 is located near the inlet of the upper drying tunnel 1, and the parallel air duct inlet 32 ​​is located relatively far from the inlet of the upper drying tunnel 1. The parallel air duct inlet 32 ​​and the parallel air duct outlet 31 are arranged opposite to each other. The parallel air flows in the opposite direction to the movement of the film slurry, ensuring the airflow velocity above the film slurry in a relatively gentle and stable manner, which helps to harden the film surface.

[0029] Preferably, in the upper drying tunnel 1, a parallel air circulation treatment device is also provided below the steel belt, and the flow rate, direction, and other parameters of the parallel air on both the upper and lower sides are optionally consistent. This preheats the steel belt and the other side of the film, improving temperature uniformity and heating efficiency. Furthermore, since there is airflow on both the upper and lower sides of the steel belt, it effectively avoids the problem of uneven force on both sides causing local bending of the steel belt, which would affect the quality of the film.

[0030] Similarly, preferably, a longitudinal air circulation treatment device 4 is also provided above the steel strip in the lower drying tunnel 2, with the nozzles facing downward or diagonally downward. The longitudinal air circulation treatment devices 4 on the inner and outer sides of the steel strip are arranged in groups opposite to each other, so that the impact of hot air on the upper and lower sides is basically offset; if the longitudinal air circulation treatment device 4 blows directly on the steel strip, the bending of the steel strip under stress will be more obvious if it is only located on one side.

[0031] For example Figure 2 As shown, in an embodiment where two or more sets of parallel air circulation processing devices are arranged sequentially along the length of the upper drying tunnel 1, and / or two or more sets of longitudinal air circulation processing devices 4 are arranged sequentially along the length of the lower drying tunnel 2, each set of parallel air circulation processing devices and longitudinal air circulation processing devices 4 is located in an independent temperature zone along the length of the upper drying tunnel 1 and the lower drying tunnel 2. Each temperature zone is divided within the upper / lower drying tunnel by partitions. The parallel air circulation processing devices and longitudinal air circulation processing devices 4 in different temperature zones are relatively independent, and different hot air temperatures can be set as needed to control the temperature of each temperature zone separately. The partition has a connecting opening in the middle for the passage of steel belts (and films), and a negative pressure air curtain device 5 is sealed and connected at the connecting opening. There is a sealed partition between the upper drying tunnel 1 and the lower drying tunnel 2. The function of the partition and the negative pressure air curtain device 5 is to form a temperature and air barrier between each temperature zone, avoiding uncontrollable mutual influence caused by gas diffusion and escape between temperature zones.

[0032] The negative pressure air curtain device 5 includes a first exhaust section 51 and a second exhaust section 52 arranged vertically opposite each other. The first exhaust section 51 and the second exhaust section 52 are used for simultaneous exhaust, and a channel space 54 is formed between the first exhaust section 51 and the second exhaust section 52 for the steel belt (and film) to pass through. The steel belt can only pass through the channel space 54 (connection port) on the sides of each temperature zone inside the oven, while the rest is sealed. When the airflow flows towards the partition between adjacent spaces, the airflow is drawn away by the first exhaust section 51 and the second exhaust section 52 on both sides, thus preventing the airflow from entering adjacent spaces. Especially for polyimide films, it is necessary to ensure that the evaporated solvent (flammable gas) is discharged from the oven in a timely manner, to ensure solvent evaporation efficiency, and to prevent the solvent from escaping into other temperature zones or spaces, for example, to prevent excessive solvent content in high-temperature zones from causing combustion or explosion. In this scheme, since hot air cannot be exchanged between spaces, the temperature also cannot be exchanged. Therefore, the temperature and solvent gas content of each temperature zone are well controllable. Furthermore, since the airflow in adjacent spaces is drawn towards the center, a certain temperature transition zone is formed between adjacent spaces, which can prevent sudden changes in ambient temperature when the film enters or exits the temperature zone.

[0033] Please see Figures 4 to 6 The negative pressure air curtain device 5 preferably adopts a static pressure box structure. The first exhaust section 51 and the second exhaust section 52 are both located on the air curtain static pressure box. An air curtain flow equalization plate 53 and / or an air regulating plate are provided at both the first exhaust section 51 and the second exhaust section 52. The air curtain flow equalization plate 53 ensures uniform airflow. Without the flow equalization plate, problems such as higher airflow near the exhaust port (e.g., exhaust duct) and insufficient airflow further away from the exhaust port (e.g., exhaust duct) will occur. Furthermore, the membrane will not be subjected to strong airflow impact when passing through, further ensuring the ventilation effect within the space. The air regulating plate, for example, is grid-shaped and can be selected to adjust the airflow speed or direction.

[0034] Preferably, the air curtain equalization plates 53 inside the first exhaust section 51 and / or the second exhaust section 52 are arranged in multiple layers (such as two or more layers) to improve the flow equalization effect. The multi-layered air curtain equalization plates 53 are arranged parallel to the film conveying direction or inclined to the film conveying direction; for example, in some embodiments, the air curtain equalization plates 53 are two layers arranged parallel to the film conveying direction (horizontally arranged); in other embodiments, the air curtain equalization plates 53 are not parallel to the film conveying direction, but at a certain angle, i.e., the inclined arrangement. The air curtain equalization plates 53 have a plurality of air holes or a plurality of slit holes, and the air holes or slit holes in each layer are arranged oppositely or staggered. Wherein, relative arrangement means that in the wind speed direction, the air holes are corresponding, and the line connecting several corresponding air holes is consistent with the wind speed direction; while staggered arrangement means that the air holes are staggered in the wind speed direction. In some embodiments, the air vents are, for example, small holes arranged closely on the flow equalization plate; in other embodiments, the air vents are arranged strip-shaped holes, or the flow equalization plate is grid-shaped or mesh-shaped; or it is a combination of multiple hole types; the slit hole is a long and narrow slit-shaped hole, for example, one or more slit holes, and the length direction of the slit hole is, for example, parallel to the width direction of the film or inclined at a certain angle.

[0035] Furthermore, preferably, channel side plates 55 are provided on both the outer sides of the first exhaust section 51 and the second exhaust section 52. The channel side plates 55, together with the air curtain equalization plates 53 of the first exhaust section 51 and the second exhaust section 52, form the four side walls of the channel space 54. Thus, the position and size of the channel space 54 are no larger than the connection opening between the two spaces, and it is sealed to the connection opening, ensuring that the airflow at the connection opening can only flow to the first exhaust section 51 and the second exhaust section 52, and cannot escape from other places around the connection opening. It is understood that for cases where the temperature zone or other process space is small, or the first exhaust section 51 and the second exhaust section 52 are large, the side walls of the temperature zone or other process space can be equivalent to the side walls of the channel space 54, effectively achieving the desired effect, thus eliminating the need for channel side plates 55 (and other structures restricting the connection opening).

[0036] In some embodiments, a slit baffle 56 is provided on at least one side of the first exhaust section 51 and the second exhaust section 52, adjacent to the channel side plate 55; for example, in the illustrated embodiment, this is a sealing connection between two upper and lower baffles fixed to the outside; the slit baffle 56 forms a slit at the entrance and / or exit of the channel space 54, the size of which is smaller than the channel space 54. The distance between the first exhaust section 51 and the second exhaust section 52 cannot be too close, therefore the slit baffle 56 further defines the size of the entrance and / or exit of the channel space 54, and preferably the position and size of the slit are adjustable (e.g., the slit is limited by two detachable / adjustable baffles). Specifically, for example, the slit is located in a central position between the first exhaust section 51 and the second exhaust section 52, so that the distance between the membrane and the first exhaust section 51 and the second exhaust section 52 is substantially the same.

[0037] In some embodiments, both the first exhaust section 51 and the second exhaust section 52 are strip-shaped to fit the width of the space connection opening; the air curtain equalization plate 53 is a porous strip-shaped flat plate, and the air curtain equalization plates 53 of the first exhaust section 51 and the second exhaust section 52 are parallel. This solution is small in size while achieving the required functions, which is convenient for production and use; the negative pressure air curtain device in the oven should not be too large to ensure the uniformity and efficiency of the main heating equipment (static pressure box). In addition, if the air curtain device is too large, it will affect the overall size of the equipment box, resulting in increased costs, low heating efficiency, and poor heat preservation.

[0038] More specifically, the two air curtain static pressure boxes (first airtight air box 57 and second airtight air box 58) of the negative pressure air curtain device 5 are respectively connected to exhaust pipes (first exhaust pipe 59 and second exhaust pipe 510). The exhaust pipes are preferably located on both sides of the air curtain static pressure box; this method of connecting exhaust pipes on both sides helps to ensure uniform airflow throughout the air curtain distribution plate 53. Preferably, the ends of the exhaust pipes furthest from the air curtain static pressure box are arranged side-by-side, such as sharing a side wall and being fixedly connected together, making the structure more compact, facilitating installation, and reducing the number of air outlets in the oven.

[0039] In a preferred embodiment, an active roller temperature zone is provided on one side of the upper drying tunnel 1 and the lower drying tunnel 2, and a passive roller temperature zone is provided on the other side. The active roller temperature zone is located within the active drum chamber 81 and may be a single temperature zone or divided into two or more temperature zones within the active drum chamber 81. Similarly, the passive roller temperature zone is located within the passive drum chamber 82 and may be a single temperature zone or divided into two or more temperature zones. The passive roller temperature zone is equipped with a far-infrared heating device or a ceramic heating device, which heats the film and steel strip within the passive roller temperature zone using far-infrared or ceramic heating methods. The passive roller temperature zone is located between the upper and lower drying tunnels in the film conveying path. In existing equipment, there is no heating device in the passive drum chamber 82; the temperature is only maintained by the box structure. After the film passes through this section, the temperature will decrease, and when it enters the temperature zone of the lower drying tunnel, the film temperature will change abruptly, affecting the process quality. This solution can achieve more precise temperature control, allowing the film temperature to change almost continuously, avoiding abrupt temperature changes that affect film quality.

[0040] Please see again Figure 2 The oven body has exhaust vents 61 located near the side partitions (partitions at both ends of the oven body's length) and / or on the side walls parallel to the partitions (i.e., side walls at both ends of the oven body's length). Optionally, exhaust vents may be located on both sides of each partition. This design places the oven exhaust vents in the dead corners of the oven, i.e., locations where evaporated solvent tends to stagnate and accumulate. This focuses exhaust from these solvent-prone areas, ensuring airflow in the dead corners and improving the efficiency and effectiveness of solvent removal.

[0041] The oven air inlet 62 is related to the setting of the static pressure chamber. For example, an air inlet is provided on the side wall of the chamber perpendicular to the partition (i.e., on both sides of the chamber's length). Specifically, for example, the oven air inlet 62 corresponding to the longitudinal air circulation treatment device 4 is located in the middle of the temperature zone, on both sides of the oven body; the air inlet corresponding to the parallel air circulation treatment device is located opposite to the parallel air duct air inlet 32. For the upper drying duct, the air inlet and exhaust port can be opened at the top of the oven body; for the lower drying duct, the situation and setting principle of the air inlet and exhaust port can be similar to that of the upper drying duct, the difference being that they are opened on the left and right sides of the oven body. The oven exhaust port 61 is sealed to the chamber body and is connected to a negative pressure fan and a waste gas treatment system, etc. The relevant required components / systems are existing technology and will not be described in detail here.

[0042] Please see Figure 3Preferably, an explosion vent 63 is provided in the upper drying tunnel 1. The explosion vent 63 is located at least near the entrance of the upper drying tunnel (in the temperature zone), for example, at least two explosion vents 63 are distributed in at least two-thirds of the section near the entrance. These areas have high solvent concentrations, and the explosion vents can relieve pressure in extreme situations. The explosion vent 63 is located, for example, at the top of the chamber. More preferably, each temperature zone is also equipped with a monitoring device for temperature, air pressure, and other conditions, which facilitates timely measures or explosion venting in extreme situations, thereby protecting the safety of equipment and personnel.

[0043] In summary, the casting machine oven structure with a top-drying flat-blowing fan of this invention employs a parallel air duct to blow preheating air in the upper drying tunnel corresponding to the initial heating stage of the film slurry. This allows the surface of the film slurry to harden and ensures airflow, while preventing hot air from directly blowing onto the film surface and affecting film quality. Subsequently, hot air is blown into the lower drying tunnel in a manner that is essentially directly facing the film surface, ensuring the efficiency and effectiveness of heating and solvent evaporation. Furthermore, this design preferably places the exhaust vent in a specific dead corner to better discharge the solvent and prevent solvent gas accumulation, which could lead to recondensation and dripping onto the film or cause potential combustion or explosion. Furthermore, this solution preferably incorporates a negative pressure air curtain device, in which two oppositely positioned exhaust vents simultaneously draw air, each equipped with an air curtain flow equalization plate to ensure uniform airflow intensity. A negative pressure air curtain is formed in the channel space between the two exhaust vents, allowing the film to be transmitted between the two spaces. Because of the negative pressure air curtain between these two spaces, issues such as temperature and gas interaction (e.g., escape / cross-contamination of gases with different temperatures and compositions) are avoided, effectively ensuring the accuracy and stability of process environment control for high-end processes.

Claims

1. A casting machine oven structure with an upper drying tunnel and a lower drying tunnel (2), characterized in that, A parallel air circulation treatment device is provided in the upper drying tunnel (1), and the distribution of the parallel air circulation treatment device covers the entire length of the upper drying tunnel (1); the parallel air circulation treatment device is provided above and below the steel belt, or only above the steel belt; the parallel air circulation treatment device includes a parallel air duct inlet (32) and a parallel air duct outlet (31) arranged opposite to each other; in the lower drying tunnel (2), a longitudinal air circulation treatment device (4) is provided at least below the steel belt, and the air direction of the longitudinal air circulation treatment device (4) is adjustable.

2. The structure of the casting machine oven with flat blowing air in the upper drying tunnel according to claim 1, characterized in that, A pair of parallel air duct inlet (32) and parallel air duct outlet (31) arranged opposite to each other constitute a set of parallel air circulation treatment devices; only one set of parallel air circulation treatment devices is provided in the upper drying tunnel (1), or two or more sets of parallel air circulation treatment devices are arranged sequentially along the length direction in the upper drying tunnel (1).

3. The structure of the casting machine oven with flat blowing air in the upper drying tunnel according to claim 2, characterized in that, Two or more sets of parallel air circulation treatment devices are arranged in sequence along the length direction in the upper drying tunnel (1), and / or two or more sets of longitudinal air circulation treatment devices (4) are arranged in sequence along the length direction in the lower drying tunnel (2); in the length direction of the upper drying tunnel (1) and the lower drying tunnel (2), each set of parallel air circulation treatment devices and longitudinal air circulation treatment devices (4) are located in an independent temperature zone.

4. The casting machine oven structure with upper drying tunnel and flat air blowing according to claim 3, characterized in that, Each temperature zone is divided by a partition, and the partition has a connecting port in the middle. A negative pressure air curtain device (5) is installed at the connecting port. The negative pressure air curtain device (5) includes a first exhaust section (51) and a second exhaust section (52) arranged opposite to each other. A channel space (54) for the steel belt to pass through is formed between the first exhaust section (51) and the second exhaust section (52).

5. The casting machine oven structure with upper drying tunnel and flat air blowing according to any one of claims 1-4, characterized in that, Parallel air duct flow equalization plate and / or air regulating plate are provided at both the air inlet (32) and air outlet (31) of the parallel air duct.

6. The casting machine oven structure with upper drying tunnel and flat air blowing according to any one of claims 1-4, characterized in that, The parallel air duct outlet (31) is located near the entrance of the upper drying duct (1), and the parallel air duct inlet (32) is located relatively far from the entrance of the upper drying duct (1). The parallel air duct inlet (32) and the parallel air duct outlet (31) are arranged opposite to each other.

7. The casting machine oven structure with upper drying tunnel and flat blowing according to any one of claims 1-4, characterized in that, An active roller temperature zone is provided on one side of the upper drying tunnel (1) and the lower drying tunnel (2), and a passive roller temperature zone is provided on the other side. The passive roller temperature zone is equipped with a far-infrared heating device or a ceramic heating device.

8. The casting machine oven structure with upper drying tunnel and flat air blowing according to claim 7, characterized in that, The oven body has an exhaust vent (61) near the side partitions and / or parallel to the partitions on the side walls.

9. The casting machine oven structure with upper drying tunnel and flat air blowing according to claim 8, characterized in that, An air inlet (62) is provided on the side wall of the oven body perpendicular to the partition.

10. The casting machine oven structure with upper drying tunnel and flat blowing according to any one of claims 1-4, characterized in that, An explosion vent (63) is provided in the upper drying tunnel (1).

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