Tempering production line

Abstract

The invention provides a tempering production line which comprises a tempering device, an inlet and an outlet of the tempering device are each provided with a closed door set, and in the conveying direction of material sheets, a first door body in each closed door set is far away from the tempering device compared with a second door body; the first door body and the second door body in any sealing door set can be opened and closed in the direction perpendicular to the material sheet conveying direction, so that the material sheets enter and exit from the tempering device in sequence. When a plurality of material sheets are synchronously and continuously conveyed, before a first door body located at an inlet / outlet of a tempering device starts to be opened, a second door body belonging to the same closed door group with the first door body is completely closed; before the second door body of the inlet / outlet of the tempering device starts to be opened, the first door body belonging to the same closed door group with the second door body is completely closed; and a preset interval between the first door body and the second door body in the same closed door group is at least larger than the thickness of one material sheet, so that the material sheet can be kept in a continuous conveying state in the process that the first door body and the second door body are opened and closed successively.

Description

Technical Field

[0001] The invention belongs to the technical field of tempering line control, and in particular relates to a tempering production line. Background Art

[0002] At present, in the field of tempering equipment, the entrance and exit of the tempering device included in the tempering production line are basically open, and the two ports are not closed, so heat dissipation problems will occur, which not only causes large energy loss during the operation of the tempering line, but also because the heat is concentrated and dissipated from the two ports to the outside, local high temperature is prone to occur at the two ports, resulting in safety hazards. Generally, there are two ways to reduce the heat dissipation problem of the tempering line. One is to add air knives at the entrance and exit of the tempering device, but when the air knife is at a long distance, the wind force in the middle area will be attenuated and cannot be completely sealed; the other is to raise the entrance and exit of the tempering device and make a diagonal bend, but this method will still cause convection between the tempering area (i.e., the tempering working area in the tempering device) and the outside air, resulting in heat dissipation, and the effect of reducing the energy loss of the tempering line has not reached expectations. Summary of the invention

[0003] In view of the above problems existing in the prior art, the main purpose of the present invention is to provide a tempering production line, which can effectively reduce tempering energy consumption loss and reduce the safety hazards caused by local high temperature.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] The present invention provides a tempering production line, comprising a tempering device, wherein the inlet and the outlet of the tempering device are both provided with a closed door group, and in the conveying direction of the sheet, the first door body in each of the closed door groups is farther away from the tempering device than the second door body; the first door body and the second door body in any of the closed door groups can be opened and closed in a direction perpendicular to the conveying direction of the sheet, so that a plurality of the sheets can enter and exit the tempering device in sequence;

[0006] When the plurality of the material sheets are in the process of synchronous and continuous conveying, before the first door body located at the entrance / exit of the tempering device begins to open, the second door body belonging to the same closed door group as the first door body is completely closed; before the second door body located at the entrance / exit of the tempering device begins to open, the first door body belonging to the same closed door group as the second door body is completely closed;

[0007] The preset interval between the first door body and the second door body in the same closed door group is at least greater than the thickness of one of the material sheets, so that the material sheet can maintain a continuous conveying state during the process of the first door body and the second door body being opened and closed successively.

[0008] As a further description of the above technical solution, before the distance between the material and the first door body in the transmission direction of the material reaches a preset value, the second door body belonging to the same closed door group as the first door body is completely closed; then the first door body begins to open, so that at least one of the material sheets can pass over the first door body and reach the second door body in the same closed door group as the first door body to wait for entering the tempering device; or,

[0009] At least one of the blanks can pass through the first door and be discharged from the tempering device.

[0010] As a further description of the above technical solution, after at least one of the webs passes over the first door body, if there is no web at one end of the first door body perpendicular to the web conveying direction, the first door body moves in the reverse direction perpendicular to the web conveying direction until it is completely closed; then the second door body in the same closed door group is opened, so that the subsequent webs can pass over the second door body and reach the tempering device; or,

[0011] The subsequent material sheet can pass through the second door body and arrive in front of the first door body in the same closed door group as the second door body to be discharged;

[0012] After at least one of the webs passes over the first door body, if there is a web at one end of the first door body perpendicular to the web conveying direction, during the process of the first door body moving in the reverse direction perpendicular to the web conveying direction, the second door body in the same closed door group as the first door body moves synchronously with the web along the web conveying direction in a closed state until the first door body can be completely closed between two adjacent webs; then the second door body in the same closed door group is opened to allow the subsequent webs to pass over the second door body and reach the tempering device; or,

[0013] Arrive in front of the first door body in the same closed door group as the second door body to wait for unloading.

[0014] As a further description of the above technical solution, after the first door body is completely closed, when the second door body is opened along a direction perpendicular to the transport direction of the sheet, the second door body also moves along the transport direction of the sheet at the same speed as the sheet.

[0015] As a further description of the above technical solution, during the process of closing the second door body along a direction perpendicular to the transmission direction of the material sheet, the second door body will also move along the direction of the material sheet conveyance at the same speed as the material sheet until the second door body is completely closed between two adjacent material sheets.

[0016] As a further description of the above technical solution, any of the first door bodies is provided with a first sensor, and any of the second door bodies is provided with a second sensor; wherein,

[0017] The first sensor is used to sense whether there is a sheet of material at one end of the first door body along a direction perpendicular to the sheet conveying direction and facing the sheet of material;

[0018] The second sensor is used to sense whether there is a sheet at one end of the second door body along a direction perpendicular to the sheet conveying direction and facing the sheet.

[0019] As a further description of the above technical solution, the first door body is further provided with a third sensor, and the third sensor is used to sense the distance between the material sheet and the first door body in the transmission direction of the material sheet.

[0020] As a further description of the above technical solution, each of the closed door groups is connected to a first power system and a second power system; wherein,

[0021] The first power system is used to drive the first door body to open and close along a direction perpendicular to the sheet conveying direction;

[0022] The second power system is used to drive the second door body to open and close along a direction perpendicular to the sheet conveying direction, and to drive the second door body to move synchronously with the sheet / reverse reset along the sheet conveying direction.

[0023] As a further description of the above technical solution, it also includes a hanger for hanging the material piece, and a plurality of the hangers are sequentially moved in and out of the tempering device in a chain drive manner.

[0024] As a further description of the above technical solution, any of the closed door groups is provided at the inlet / outlet of the tempering device through a base;

[0025] The closed door group is also covered with a shell made of rock wool board.

[0026] By means of the above technical solution, the outstanding effects of the present invention are:

[0027] In the tempering production line provided by the present invention, a closed door group is provided at the entrance and exit of the tempering device. In the conveying direction of the sheet, the first door body included in each closed door group is farther away from the tempering device than the second door body. That is, in the process of tempering of multiple sheets through the tempering production line, the route thereof is: the first door body at the entrance of the tempering device → the second door body at the entrance of the tempering device → the tempering device → the second door body at the exit of the tempering device → the first door body at the exit of the tempering device, and the first door body and the second door body in any closed door group can be opened and closed in a direction perpendicular to the sheet conveying direction, so that multiple sheets can smoothly enter and exit the tempering device in sequence to complete the tempering operation. When multiple sheets are in the process of synchronous and continuous conveying, before the first door body at the entrance / exit of the tempering device begins to open, the second door body belonging to the same closed door group as the first door body is completely closed, and before the second door body at the entrance / exit of the tempering device begins to open, the first door body belonging to the same closed door group as the second door body is completely closed, so that the entrance and exit of the tempering device are always in a closed state, thereby effectively preventing heat from escaping to the outside from the entrance and exit of the tempering device, reducing the tempering energy loss, and also reducing the safety hazard caused by local high temperature at the entrance and exit of the tempering device. Among them, the preset interval between the first door body and the second door body in the same closed door group is at least greater than the thickness of a sheet, so that during the continuous conveying of the sheet, it will not collide with the first door body and the second door body that are opened and closed successively, ensuring that the sheet can be continuously conveyed for tempering operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the partial structure of the tempering production line in an embodiment of the present invention;

[0029] Figure 2 It is a schematic diagram of the structure of two power systems in an embodiment of the present invention;

[0030] Figure 3 Schematic diagram of the opening and closing logic of two door bodies in the same closed door group in an embodiment of the present invention;

[0031] Description of Figure Numbers:

[0032] 1. Tempering device; 2. Material sheet; 3. First door body; 4. Second door body; 5. First power system; 6. Second power system; 7. Lifting device; 8. Base; 9. Shell; 10. Blower. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "middle", "lower", "inside", "outside", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following describes an implementation method of the present invention based on its overall structure.

[0035] See also Figures 1 to 3 The present embodiment discloses a tempering production line, which includes a tempering device 1, wherein the entrance and exit of the tempering device 1 are both provided with a closed door group, and in the conveying direction of the sheet 2, the first door body 3 in each of the closed door groups is farther away from the tempering device 1 than the second door body 4; the first door body 3 and the second door body 4 in any of the closed door groups can be opened and closed in a direction perpendicular to the conveying direction of the sheet 2, so that a plurality of the sheets 2 can enter and exit the tempering device 1 in sequence;

[0036] When the plurality of the material sheets 2 are in the process of synchronous continuous conveying, before the first door body 3 located at the entrance / exit of the tempering device 1 begins to open, the second door body 4 belonging to the same closed door group as the first door body 3 is completely closed; before the second door body 4 at the entrance / exit of the tempering device 1 begins to open, the first door body 3 belonging to the same closed door group as the second door body 4 is completely closed;

[0037] The preset interval between the first door body 3 and the second door body 4 in the same closed door group is at least greater than the thickness of one of the sheet materials 2, so that the sheet materials 2 can maintain a continuous conveying state during the process of the first door body 3 and the second door body 4 being opened and closed successively.

[0038] In the above-mentioned setting method, a closed door group is provided at the entrance and exit of the tempering device 1. In the conveying direction of the sheet 2, the first door body 3 included in each of the closed door groups is farther away from the tempering device 1 than the second door body 4, that is, during the tempering of multiple sheets 2 through the tempering production line, their route is: the first door body 3 at the entrance of the tempering device 1 → the second door body 4 at the entrance of the tempering device 1 → the tempering device 1 → the second door body 4 at the exit of the tempering device 1 → the first door body 3 at the exit of the tempering device 1, and the first door body 3 and the second door body 4 in any of the closed door groups can be opened and closed in a direction perpendicular to the conveying direction of the sheet 2, so that the multiple sheets 2 can smoothly enter and exit the tempering device 1 in turn to complete the tempering operation. When the plurality of the sheets 2 are in the process of synchronous continuous conveying, before the first door body 3 located at the entrance / exit of the tempering device 1 begins to open, the second door body 4 belonging to the same closed door group as the first door body 3 is completely closed, and before the second door body 4 at the entrance / exit of the tempering device 1 begins to open, the first door body 3 belonging to the same closed door group as the second door body 4 is completely closed, so that the entrance and exit of the tempering device 1 are always in a closed state, thereby effectively preventing heat from escaping to the outside from the entrance and exit of the tempering device 1, reducing the tempering energy loss, and also reducing the safety hazard caused by local high temperature at the entrance and exit of the tempering device 1. Among them, the preset interval between the first door body 3 and the second door body 4 in the same closed door group is at least greater than the thickness of one sheet 2, so that during the continuous conveying of the sheet 2, it will not collide with the first door body 3 and the second door body 4 that are opened and closed successively, ensuring that the sheet 2 can be continuously conveyed for tempering operation.

[0039] See also Figure 1 and Figure 3Specifically, in this embodiment, the material 2 is fed into the tempering device 1 from left to right. When the material 2 reaches the first door body 3 and the distance between the material 2 and the first door body 3 reaches a preset value, the first door body 3 begins to open, so that the material 2 can pass over the first door body 3 and continue to be transported to the left between the first door body 3 and the second door body 4, waiting to continue to pass over the second door body 4 to reach the tempering device 1 for tempering. When the material 2 gradually approaches the first door body 3 by a preset value, before the first door body 3 begins to open, the second door body 4 belonging to the same closed door group as the first door body 3 will be completely closed, thereby ensuring that the heat in the tempering device 1 will not be directly convected with the outside air and dissipated in large quantities. Similarly, after the material sheet 2 completes the tempering operation in the tempering device 1, it then passes through the second door body 4 at the outlet of the tempering device 1 and after the second door body 4 is closed, the material sheet 2 that continues to be transported forward reaches a predetermined position, and the first door body 3 at the outlet of the tempering device 1 will open, so that the material sheet 2 can pass through the first door body 3 to complete the discharge.

[0040] Specifically, in the present embodiment, after at least one of the material pieces 2 passes over the first door body 3 at the entrance of the tempering device 1 to the left and reaches between the first door body 3 and the second door body 4 belonging to the same closed door group as the first door body 3, if there is no material piece 2 above the first door body 3, the first door body 3 will directly move up in the vertical direction until it is completely closed; then the second door body 4 in the closed door group opens, so that the material piece 2 can pass over the second door body 4 and continue to be conveyed forward to the tempering device 1 for tempering; after the material piece 2 completes the tempering operation in the tempering device 1, it continues to be conveyed forward, and then the second door body 4 at the entrance of the tempering device 1 opens to allow the material piece 2 to pass over and arrive in front of the first door body 3 belonging to the same closed door group as the second door body 4 to wait for discharge.

[0041] After at least one of the sheet materials 2 passes over the first door body 3 at the entrance of the tempering device 1 to the left and reaches between the first door body 3 and the second door body 4 belonging to the same closed door group as the first door body 3, if there is a sheet material 2 along one end of the first door body 3 perpendicular to the conveying direction of the sheet material 2, during the process of the first door body 3 moving up in the vertical direction to close, the second door body 4 in the same closed door group as the first door body 3 will move synchronously with the sheet material 2 along the conveying direction of the sheet material 2 in a closed state (this process makes the relative position of the sheet material 2 closest to the second door body 4 and the second door body 4 remain unchanged, but The sheet 2 located above the first door body 3 can be shifted forward to avoid the first door body 3 that is performing the closing action) until the first door body 3 can be completely closed between the two adjacent sheets 2 on the left and right; then the second door body 4 in the same closed door group is opened, so that the subsequent sheet 2 can pass through the second door body 4 and reach the tempering device 1; after the sheet 2 completes the tempering operation in the tempering device 1, it continues to be transported forward, and then the second door body 4 at the entrance of the tempering device 1 is opened to allow the sheet 2 to pass through, and arrive in front of the first door body 3 belonging to the same closed door group as the second door body 4 to wait for discharge.

[0042] Specifically, in the present embodiment, after the first door body 3 is completely closed, while the second door body 4 moves downward in the vertical direction to open, the second door body 4 also moves in the direction of conveying of the material sheet 2 at the same speed as the material sheet 2, thereby avoiding the second door body 4 that is performing the opening action from colliding with the material sheet 2 that is still in a state of continuous forward movement.

[0043] Specifically, in the present embodiment, while the second door body 4 is moving in the vertical direction to close, the second door body 4 will also move in the direction of conveying of the material 2 at the same speed as the material 2 until the second door body 4 is completely closed between two adjacent material pieces 2. This is also to avoid the second door body 4 that is performing the closing action from colliding with the material 2 that is still in a state of continuous forward movement.

[0044] Specifically, in this embodiment, any of the first door bodies 3 is provided with a first sensor (not shown in the figure), and any of the second door bodies 4 is provided with a second sensor (not shown in the figure); wherein the first sensor is used to sense whether there is a sheet 2 at the upper end of the first door body 3; and the second sensor is used to sense whether there is a sheet 2 at the upper end of the second door body 4. The specific sensor model can be selected according to actual detection needs (e.g., detection length, high temperature resistance value and other parameters).

[0045] Specifically, in this embodiment, the first door body 3 is further provided with a third sensor, and the third sensor is used to sense and feedback the distance between the material sheet 2 and the first door body 3 in the transmission direction of the material sheet 2, so as to ensure that when the distance between the material sheet 2 and the first door body 3 reaches a preset value, the first door body 3 can accurately perform the opening action. The third sensor is, for example, a proximity sensor.

[0046] See also Figure 2 Specifically, in the present embodiment, each of the closed door groups is connected to a first power system 5 and a second power system 6; wherein the first power system 5 is used to drive the first door body 3 to open and close along a vertical direction; the second power system 6 is used to drive the second door body 4 to open and close along a vertical direction, and to drive the second door body 4 to move synchronously with the material 2 / reverse reset along the direction in which the material 2 is conveyed.

[0047] Specifically, in this embodiment, the material pieces 2 are sequentially moved in and out of the tempering device 1 by a chain drive using a hanger 7 .

[0048] Please continue reading Figure 1 and Figure 3 Specifically, in this embodiment, any of the closed door groups is correspondingly arranged on a base 8, and then correspondingly arranged at the entrance and exit of the tempering device 1; the closed door group is also covered with a shell 9 made of rock wool board, so as to cooperate with the two door bodies belonging to the same closed door group to ensure that the entrance and exit of the tempering device 1 are continuously closed and insulated. Preferably, a blower 10 component is also provided between the second door body 4 and the entrance and exit of the tempering device 1 for cooling, so that the temperature between the first door body 3 and the second door body 4 is lower than that of the tempering device 1, thereby avoiding the occurrence of local high temperature between the first door body 3 and the second door body 4, which in turn causes safety hazards.

[0049] Taking the entrance of the tempering device 1 as an example, the action logic sequence of the two door bodies belonging to the same closed door group is as follows:

[0050] The sheet 2 is hoisted on the sling 7 and moved toward the tempering device 1 by chain drive (at 0.5m / min). When the third sensor senses that the sheet 2 is close to the first door body 3 to a preset value, the first door body 3 is driven by the first power system 5 to descend and open (the second door body 4 is completely closed before the first door body 3 is opened), so that multiple sheets 2 can pass over the first door body 3 one by one with the corresponding sling 7 and arrive between the first door body 3 and the second door body 4. Since the sheet 2 is continuously fed by chain drive, and the first door body 3 needs to be closed after multiple sheets 2 are fed, in order to successfully close the first door body 3, the first sensor is provided. The sensor senses foreign matter (i.e., sheet 2) above the first door body 3 during the gradual closing process. When the first sensor senses that there is sheet 2 interfering above the first door body 3, the second door body 4 in the closed state will move synchronously and at the same speed with the sling 7 toward the tempering device 1, so that the first door body 3 can find the gap between the two sheets 2 closed on its outer side (i.e., its right side) and inner side (i.e., its left side); after the first door body 3 is completely closed, the second door body 4 will quickly move in the reverse direction back to the origin (i.e., quickly descend and open), and the multiple sheets 2 between the second door body 4 and the first door body 3 will smoothly enter the tempering device 1, and then the two doors of the closed door group will enter the next opening and closing cycle. In the process of the second door body 4 descending and opening, in order to avoid collision with the sling 7 and the sheet 2, it will also move synchronously and at the same speed (for example, at a speed of 0.5m / min) toward the tempering device 1 for a certain distance with the sling 7.

[0051] Among them, the second door body 4 is completely closed before the first door body 3 starts to open, and the position is also accurately found during the process of its complete closing. Therefore, a second sensor is provided on the second door body 4 to sense the foreign matter (i.e., the sheet 2) above it. When it senses that the sheet 2 interferes and cannot be closed, it will be driven by the second power system 6 to move synchronously with the hanger 7 at the same speed (e.g., a speed of 0.5m / min) toward the tempering line. During this process, it will also move toward the hanger 7 (e.g., driven by the servo gear rack belonging to the second power system 6 to move toward the hanger 7 at a speed of 100mm / S) until the gap is accurately found and it is completely closed. In this way, one of the two door bodies belonging to the same closed door group is always in a closed state, thereby ensuring that the entrance of the tempering device 1 is continuously closed.

[0052] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any changes, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tempering production line, characterized in that: The invention comprises a tempering device, wherein the entrance and the exit of the tempering device are both provided with a closed door group, and in the conveying direction of the sheet, the first door body in each of the closed door groups is farther away from the tempering device than the second door body; the first door body and the second door body in any of the closed door groups can be opened and closed in a direction perpendicular to the conveying direction of the sheet, so that a plurality of the sheets can enter and exit the tempering device in sequence; When the plurality of the material sheets are in the process of synchronous and continuous conveying, before the first door body located at the entrance / exit of the tempering device begins to open, the second door body belonging to the same closed door group as the first door body is completely closed; before the second door body located at the entrance / exit of the tempering device begins to open, the first door body belonging to the same closed door group as the second door body is completely closed; The preset interval between the first door body and the second door body in the same closed door group is at least greater than the thickness of one of the material sheets, so that the material sheet can maintain a continuous conveying state during the process of the first door body and the second door body being opened and closed successively.

2. The tempering production line according to claim 1, characterized in that: Before the distance between the material and the first door body in the conveying direction of the material reaches a preset value, the second door body belonging to the same closed door group as the first door body is completely closed; then the first door body begins to open, so that at least one of the material sheets can pass over the first door body and reach the second door body in the same closed door group as the first door body to wait for entering the tempering device; or, At least one of the blanks can pass through the first door and be discharged from the tempering device.

3. The tempering production line according to claim 2, characterized in that: When at least one of the webs passes over the first door body, if there is no web at one end of the first door body perpendicular to the web conveying direction, the first door body moves in the reverse direction perpendicular to the web conveying direction until it is completely closed; then the second door body in the same closed door group opens, so that the subsequent webs can pass over the second door body and reach the tempering device; or, The subsequent material sheet can pass through the second door body and arrive in front of the first door body in the same closed door group as the second door body to be discharged; After at least one of the webs passes over the first door body, if there is a web at one end of the first door body perpendicular to the web conveying direction, during the process of the first door body moving in the reverse direction perpendicular to the web conveying direction, the second door body in the same closed door group as the first door body moves synchronously with the web along the web conveying direction in a closed state until the first door body can be completely closed between two adjacent webs; then the second door body in the same closed door group is opened to allow the subsequent webs to pass over the second door body and reach the tempering device; or, Arrive in front of the first door body in the same closed door group as the second door body to wait for unloading.

4. The tempering production line according to claim 3, characterized in that: After the first door is completely closed, during the process of the second door being opened along a direction perpendicular to the transport direction of the web, the second door also moves along the transport direction of the web at the same speed as the web.

5. The tempering production line according to claim 4, characterized in that: When the second door is closed along a direction perpendicular to the sheet conveying direction, the second door will also move along the sheet conveying direction at the same speed as the sheet until the second door is completely closed between two adjacent sheets.

6. The tempering production line according to claim 5, characterized in that: Any of the first door bodies is provided with a first sensor, and any of the second door bodies is provided with a second sensor; wherein, The first sensor is used to sense whether there is a sheet of material at one end of the first door body along a direction perpendicular to the sheet conveying direction and facing the sheet of material; The second sensor is used to sense whether there is a sheet at one end of the second door body along a direction perpendicular to the sheet conveying direction and facing the sheet.

7. The tempering production line according to claim 6, characterized in that: The first door body is further provided with a third sensor, and the third sensor is used to sense the distance between the material sheet and the first door body in the transmission direction of the material sheet.

8. The tempering production line according to claim 5, characterized in that: Each of the closed door groups is connected to a first power system and a second power system; wherein, The first power system is used to drive the first door body to open and close along a direction perpendicular to the sheet conveying direction; The second power system is used to drive the second door body to open and close along a direction perpendicular to the sheet conveying direction, and to drive the second door body to move synchronously with the sheet / reverse reset along the sheet conveying direction.

9. The tempering production line according to claim 1, characterized in that: It also includes a hanger for hanging the material piece, and a plurality of the hangers are sequentially moved in and out of the tempering device in a chain-driven manner.

10. The tempering production line according to claim 1, characterized in that: Any of the enclosed door groups is disposed at the inlet / outlet of the tempering device through a base; The closed door group is also covered with a shell made of rock wool board.

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