Efficient tunnel furnace and baking method

Abstract

The invention provides an efficient tunnel furnace and a baking method, and the efficient tunnel furnace comprises a furnace shell which defines a baking channel, and the baking channel extends in the conveying direction; the baking bins are arranged in the baking channel in the conveying direction, a surrounding type bin channel is defined by the baking bins, the input end and the output end of the surrounding type bin channel are open, and supporting guide parts are arranged in the baking bins so as to support the single products to be baked; the heating piece is arranged on the baking bin so as to supply heat to the surrounding type bin channel; the conveying assembly is arranged on the surrounding type bin channel in a penetrating mode and conducts circulating motion so as to push the multiple batches of single-piece products in an assembly line mode, and the multiple batches of single-piece products can sequentially move on the supporting and guiding part. The problems that in the prior art, a placing frame filled with single-piece products is placed in a baking oven to be baked, so that the heating efficiency of the single-piece products is low, baking heating is not uniform, and energy consumption is wasted are solved.

Description

Technical Field

[0001] The present application relates to the technical field of baking equipment, and more specifically, to an efficient tunnel furnace and a baking method. Background Art

[0002] In the production process of some single-chip products, such as in the production links of LED packaging, semiconductor packaging, etc., it is necessary to bake the products to perform operations such as dehumidification of materials and semi-finished products, glue curing, product aging, and finished product dehumidification, to meet the material process requirements and ensure product quality. Lamp boards, circuit boards, etc. are prone to moisture in the integrated circuit board due to being placed for too long, which affects the use of single-chip products (especially integrated circuit boards). Therefore, before assembling components for some single-chip products, it is generally recommended to bake them, which can reduce the risk of water vapor residue and board explosion. Moreover, many single-chip products are generally coated with ink for solder mask treatment before processing, and also need to be dried after coating the ink. Therefore, some existing single-chip products usually use a baking furnace or a tunnel furnace to bake the products.

[0003] During the baking process of the existing baking furnace or tunnel furnace for products, usually multiple single-chip products are stacked in a placement basket, and then the placement basket filled with single-chip products is placed in the baking furnace or tunnel furnace, and the entire placement basket is baked by heating in the baking furnace or tunnel furnace. Since the single-chip products are surrounded by the placement basket, the baking heat will be blocked by the placement basket, resulting in problems such as slow heating efficiency and uneven baking heat of the single-chip products. At the same time, the placement basket will also absorb heat, increasing the heat conduction energy consumption and causing unnecessary energy consumption waste.

[0004] Therefore, the existing technology still needs to be improved and developed. Summary of the Invention

[0005] The purpose of the present application is to provide an efficient tunnel furnace and a baking method, which solve the problems of slow heating efficiency, uneven baking heat, and energy consumption waste of single-chip products caused by placing the placement basket filled with single-chip products in the baking furnace in the existing technology.

[0006] To achieve the above purpose, the technical solution adopted in the present application is:

[0007] On the one hand, the present application provides an efficient tunnel furnace, including: a furnace shell, the furnace shell encloses a baking channel, and the baking channel extends along the conveying direction;

[0008] At least one baking chamber, the baking chamber is arranged in the baking channel along the conveying direction and encloses an enclosed channel, both the input end and the output end of the enclosed channel are open, and a support guiding part is arranged in the baking chamber to support the single-chip products to be baked;

[0009] A heating element, the heating element is arranged on the baking chamber to supply heat to the enclosed channel;

[0010] The transmission component is disposed through the enclosed bin channel and moves in a cycle to push multiple batches of single-piece products in a pipeline manner, so that multiple batches of single-piece products move on the support and guiding part in sequence.

[0011] Optionally, the baking bin includes: a heat-conducting bin shell, with both the input end and the output end of the heat-conducting bin shell being open to form an enclosed bin channel inside the heat-conducting bin shell;

[0012] The heating element is disposed on the outer wall of the heat-conducting bin shell to bake the single-piece product through the heat conduction of the heat-conducting bin shell.

[0013] Optionally, the support and guiding part includes: guiding grooves respectively disposed on the inner walls on both sides of the enclosed bin channel, and the two side edges of the single-piece product are respectively inserted into the guiding grooves on both sides.

[0014] Optionally, the transmission component includes: a chain drive, the chain of the chain drive has an upper chain segment and a lower chain segment extending along the conveying direction, and the chain is threaded through the heat-conducting bin shell, so that the upper chain segment is disposed through the enclosed bin channel and the lower chain segment is located outside the heat-conducting bin shell;

[0015] A plurality of pushing plates are spaced apart on the chain and move into the enclosed bin channel in sequence through the movement of the chain to push the single-piece product.

[0016] Optionally, the transmission component further includes: a cushion block, the cushion block is disposed in the enclosed bin channel and is located between the upper chain segment and the inner bottom surface of the heat-conducting bin shell to support the upper chain segment.

[0017] Optionally, an out-of-box input component is disposed at the input end of the baking channel, and the out-of-box input component is used to push the single-piece product to be baked out of the placement frame so that the single-piece product enters the enclosed bin channel.

[0018] Optionally, the out-of-box input component includes: a first box body moving member, the first box body moving member is used to move the placement frame from the storage area to the opening at the input end of the enclosed bin channel;

[0019] A pushing cylinder, a push plate is connected to the piston rod of the pushing cylinder, and the push plate moves towards the opening at the input end of the enclosed bin channel through the drive of the pushing cylinder to push the single-piece product in the placement frame into the support and guiding part of the enclosed bin channel.

[0020] Optionally, the first box body moving member includes: a first double-speed chain conveyor line, the first double-speed chain conveyor line is disposed below the pushing cylinder and conveys the placement frame containing the single-piece product towards the opening at the input end of the enclosed bin channel;

[0021] The first lifting platform is movably arranged in the vertical direction between the output end of the first double-speed chain conveyor line and the input end of the enclosed bin channel, and is used to receive the placement frame containing single-piece products output by the first double-speed chain conveyor line, and convey the placement frame containing single-piece products upward to the input end of the enclosed bin channel.

[0022] Optionally, a box loading output assembly is provided at the output end of the baking channel, and the box loading output assembly is used to send the single-piece products after baking from the enclosed bin channel into the placement frame.

[0023] Optionally, the box loading output assembly includes: a second box body moving member for arranging an empty placement frame;

[0024] An auxiliary box loading member is arranged at the opening of the output end of the enclosed bin channel, and the auxiliary box loading member is used to push the single-piece products after baking from the opening of the output end of the enclosed bin channel into the placement frame on the second box body moving member;

[0025] The second box body moving member moves the placement frame carrying the single-piece products from the opening of the output end of the enclosed bin channel to the completion area.

[0026] Optionally, the second box body moving member includes: a second lifting platform movably arranged in the vertical direction at the output end of the enclosed bin channel, and receiving the single-piece products after baking pushed out by the auxiliary box loading member from the output end of the enclosed bin channel through the empty placement frame;

[0027] A second double-speed chain conveyor line is arranged on one side of the second lifting platform, and conveys the placement frame containing the single-piece products after baking from the second lifting platform to the completion area.

[0028] Optionally, the auxiliary box loading assembly includes: a front pushing member arranged at the input end of the enclosed bin channel;

[0029] An auxiliary lifting assembly is connected to the front pushing member to drive the front pushing member to rise or fall;

[0030] An auxiliary horizontal pushing assembly is connected to the auxiliary lifting assembly to drive the auxiliary lifting assembly to move towards the second box body moving member;

[0031] The front pushing member is driven by the auxiliary lifting assembly to move upward into the enclosed bin channel and is located on one side of the single-piece products after baking facing the input end of the enclosed bin channel. Driven by the auxiliary horizontal pushing assembly, the single-piece products at the opening of the output end of the enclosed bin channel are pushed out from the opening of the output end of the enclosed bin channel into the placement frame.

[0032] Optionally, a box conveying component is arranged between the box-out input component and the box-in output component, and the box conveying component is used to convey the empty placement frame on the box-out input component to the box-in output component.

[0033] Optionally, the box conveying component includes: a first belt line, which is arranged on the box-out input component and is used to convey the placement frame towards the outside of the furnace shell;

[0034] a second belt line, which is arranged on the outside of the furnace shell and extends along the conveying direction, and the head end of the second belt line is docked with the output end of the first belt line;

[0035] a third belt line, which is arranged on the box-in output component and is used to convey the placement frame towards the inside of the furnace shell, and the third belt line is docked with the tail end of the second belt line;

[0036] a box pushing member, which is arranged at the tail end of the second belt line and is used to push the placement frame at the tail end of the second belt line onto the third belt line.

[0037] Optionally, an air suction cooling component is arranged at the top of the furnace shell, and the air suction cooling component is used to suck the waste gas in the baking channel and the surrounding channel.

[0038] Optionally, the air suction cooling component includes: an exhaust duct, which communicates the baking channel and the surrounding channel;

[0039] a cooler, which communicates with the exhaust duct to suck the waste gas;

[0040] An active scraper is arranged on one side of the cooler, the active scraper is connected to a pushing power member, and the active scraper moves along the inner cavity of the cooler through the drive of the pushing power member to clean the inner cavity of the cooler.

[0041] On the other hand, the present application also proposes a baking method for an efficient tunnel furnace, which is applied to the efficient tunnel furnace as described above, and the baking method includes the steps of:

[0042] Through the box-out input component at the input end of the baking channel, the single-piece product to be baked is pushed out of the placement frame so that the single-piece product enters the surrounding channel;

[0043] The single-piece product on the support and guiding part entering the surrounding channel is pushed by the transmission component that moves in a cycle in the surrounding channel, so that multiple batches of single-piece products move and are baked in the surrounding channel in a pipeline manner along the conveying direction, and the surrounding channel is heated by a heating member;

[0044] The box conveying component is used to convey the empty placement frame on the box-out input component to the box-in output component;

[0045] After baking, the single-piece products are sent from the enclosed bin channel into an empty placement container through the box loading and output component.

[0046] The beneficial effects of an efficient tunnel furnace and a baking method provided by this application are at least as follows: The baking channel is formed by the furnace shell and extends along the conveying direction. The baking channel is used for heat preservation, so that the heat is concentrated inside the furnace shell. At least one baking bin is arranged inside the furnace shell. The baking bin is arranged in the baking channel along the conveying direction and encloses an enclosed bin channel, and a support and guiding part is arranged therein. The baking bin is heated by a heating element, and the heat is concentrated in the support and guiding part and the enclosed bin channel through heat conduction of the baking bin. When the single-piece products are pushed by the transmission component, the single-piece products are in direct contact with the support and guiding part, and the upper and lower surfaces of the single-piece products are exposed in the enclosed bin channel. Thus, multiple batches of single-piece products are baked while moving in the enclosed bin channel in a pipeline manner along the conveying direction. The single-piece products in direct contact with the support and guiding part are quickly heated, thereby improving the baking efficiency. Moreover, the heat is concentrated in the enclosed bin channel, so that the upper and lower surfaces of the single-piece products are heated in the enclosed bin channel, making the baking heating more uniform and the heating efficiency higher, and improving the baking effect of the single-piece products. At the same time, the placement container does not enter the baking bin and circulates outside the heating bin. The placement container does not absorb heat, effectively reducing the heating energy consumption. Description of the Drawings

[0047] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0048] Figure 1 It is a schematic structural diagram of an efficient tunnel furnace provided by an embodiment of this application;

[0049] Figure 2 It is a cross-sectional view of the main part of an efficient tunnel furnace provided by an embodiment of this application;

[0050] Figure 3 It is a schematic structural diagram of the baking bin of an efficient tunnel furnace provided by an embodiment of this application;

[0051] Figure 4 It is a partial structural diagram of the transmission component of an efficient tunnel furnace provided by an embodiment of this application;

[0052] Figure 5 It is a schematic structural diagram of the out-box input component, box body conveying component and box loading and output component of an efficient tunnel furnace provided by an embodiment of this application;

[0053] Figure 6 Schematic diagram of a working process of an out-box input component of an efficient tunnel furnace provided by an embodiment of the present application, where Figure 6 Figure (a) is a schematic diagram of the out-box input component in the descending position ready to receive the placement frame, where Figure 6 Figure (b) is a schematic diagram of the out-box input component in the descending position receiving the placement frame;

[0054] Figure 7 Schematic diagram of another working process of an out-box input component of an efficient tunnel furnace provided by an embodiment of the present application, where Figure 7 Figure (c) is a schematic diagram of the out-box input component in the ascending position aligned with the enclosed channel, where Figure 7 Figure (d) is a schematic diagram of the pushing cylinder pushing a single product from the placement frame into the enclosed channel;

[0055] Figure 8 Schematic diagram of an auxiliary lifting component of an efficient tunnel furnace provided by an embodiment of the present application;

[0056] Figure 9 Schematic diagram of an air suction and cooling component of an efficient tunnel furnace provided by an embodiment of the present application.

[0057] Among them, the reference numerals in the figure:

[0058] 100, frame; 200, furnace shell; 210, baking channel; 220, heat insulation layer; 300, baking chamber; 310, heat conduction chamber shell; 311, enclosed channel; 320, heating element; 330, support and guiding part; 331, guiding groove; 400, transmission component; 410, chain transmission part; 411, chain; 412, cushion block; 413, upper chain section; 414, lower chain section; 420, pushing plate; 500, out-box input component; 510, first box body moving part; 511, first double-speed chain conveyor line; 512, first lifting platform; 513, limit through hole; 520, pushing cylinder; 521, push plate; 530, lifting and blocking mechanism; 540, spacer column; 600, box body conveying component; 610, first belt line; 620, second belt line; 630, third belt line; 640, box body pushing part; 700, box loading and output component; 710, second box body moving part; 711, second lifting platform; 712, second double-speed chain conveyor line; 720, auxiliary box loading part; 730, front pushing part; 731, front pushing lifting plate; 732, column; 740, auxiliary lifting component; 741, auxiliary base; 742, auxiliary lifting cylinder; 743, vertical guiding part; 750, auxiliary horizontal pushing component; 751, linear slide table; 752, horizontal guiding part; 800, air suction and cooling component; 810, exhaust duct; 820, cooler; 830, movable scraper; 840, pushing power part. Detailed implementation manners

[0059] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0060] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly or indirectly located on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component. The orientations or positions indicated by the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positions shown in the accompanying drawings, and are only for convenience of description and cannot be construed as limitations on the technical solutions of the present application. The terms "first" and "second" are only used for the purpose of convenient description and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of technical features. The meaning of "a plurality" is two or more unless otherwise specifically defined.

[0061] Embodiment 1

[0062] As Figure 1 、 Figure 2 shown, this embodiment provides an efficient tunnel furnace, which mainly includes: a frame 100, a furnace shell 200, at least one baking chamber 300, a heating element 320, and a transmission assembly 400. As Figure 1 shown, the frame 100 is vertically arranged to structurally support the entire efficient tunnel furnace. The furnace shell 200 is disposed on the frame 100 and encloses a baking channel 210, and the baking channel 210 extends along the conveying direction; a heat insulation layer 220, such as heat insulating cotton and other materials, can be disposed on the inner wall of the furnace shell 200, so as to reduce the heat loss in the baking channel 210. For the convenience of structural description, the conveying direction is defined as the direction from the back to the front, the direction perpendicular to the conveying direction on the horizontal plane is the left-right direction, and the vertical direction is the up-down direction. As Figure 2 、 Figure 3As shown in the figure, the baking chamber 300 is arranged in the baking channel 210 along the conveying direction (front-back direction) and encloses an enclosed channel 311. The enclosed channel 311 extends a predetermined length along the front-back direction, with its rear end being the input end and its front end being the output end. Both the input end and the output end of the enclosed channel 311 are open, while all other sides are closed. A support and guiding portion 330 is provided in the baking chamber 300 to support a single product to be baked. A heating element 320 is arranged on the baking chamber 300 to supply heat to the enclosed channel 311. The transmission assembly 400 is disposed through the enclosed channel 311 and moves in a cycle to push multiple batches of single products in a pipeline manner, enabling multiple batches of single products to move sequentially on the support and guiding portion 330 in the direction from the back to the front. While moving, the single products are heated and baked by the hot air in the enclosed channel and the heat of the support and guiding portion 330. It should be noted that multiple baking chambers 300 are provided in this embodiment, for example, 6. The multiple baking chambers 300 are arranged side by side in the baking channel 210 along the left-right direction. The structures of the multiple baking chambers 300 are basically the same. By setting multiple in this way, baking can be carried out simultaneously in multiple channels, improving the baking efficiency. For the sake of simplifying the structure description, the following will specifically describe with one baking chamber 300.

[0063] As Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown in the figure, for the high-efficiency tunnel furnace of this embodiment, the baking channel 210 is enclosed by the furnace shell 200, enabling the baking channel 210 to extend along the conveying direction. The baking channel 210 is used for heat preservation to concentrate the heat inside the furnace shell 200. By providing at least one baking chamber 300 inside the furnace shell 200, the baking chamber 300 is arranged in the baking channel 210 along the conveying direction and encloses an enclosed channel 311, and a support and guiding portion 330 is arranged therein. The baking chamber 300 is heated by the heating element 320, and the heat is concentrated in the support and guiding portion 330 and the enclosed channel 311 through heat conduction of the baking chamber 300. When the single products are pushed by the transmission assembly 400, the single products are in direct contact with the support and guiding portion 330, and the upper and lower surfaces of the single products are exposed in the enclosed channel 311. Thus, multiple batches of single products are baked while moving in a pipeline manner along the conveying direction in the enclosed channel 311. The single products in direct contact with the support and guiding portion 330 are quickly heated, thereby improving the baking efficiency. Moreover, the heat is concentrated in the enclosed channel 311, enabling the upper and lower surfaces of the single products to be heated in the enclosed channel 311, making the baking more uniform in heat reception, with a higher heating efficiency and improving the baking effect of the single products.

[0064] As Figure 2 , Figure 3As shown, further, the baking chamber 300 of this embodiment specifically includes a heat-conducting chamber shell 310. The outer shape of the heat-conducting chamber shell 310 can be square. Since the length extending in the front-back direction is relatively long, the baking chamber 300 can be spliced along the front-back direction by a plurality of heat-conducting chamber shells 310 with shorter lengths, so that the required length can be spliced, and it is easy to think that a whole heat-conducting chamber shell 310 extending along the front-back direction can also be used. Both the input end and the output end of the heat-conducting chamber shell 310 are open, so as to form an enclosed channel 311 inside the heat-conducting chamber shell 310, and the four sides of the heat-conducting chamber shell 310 in the up-down, left-right directions are all closed. The heating element 320 is arranged on the outer wall of the heat-conducting chamber shell 310, and the single-piece product is baked through the heat conduction of the heat-conducting chamber shell 310; it should be noted that the heating element 320 can also be arranged on the inner walls of the heat-conducting chamber shell 310 in the up-down, left-right directions, and can be arranged as long as it does not affect the position where the single-piece product flows. In a specific structure, the heating element 320 is powered on and starts to generate heat. The heating element 320 can be arranged on the outer walls of the left and right sides of the heat-conducting chamber shell 310, and a plurality of heating elements 320 are arranged on each side. The plurality of heating elements 320 are arranged in the front-back direction, so that the entire section of the heat-conducting chamber shell 310 can be heated. The heat-conducting chamber shell 310 can be made of a metal material to increase the heat conduction efficiency, and the enclosed channel 311 can make the heat concentrated in the channel, so that the heat is not easy to dissipate and the heat utilization rate is improved.

[0065] As Figure 2 , Figure 3 , Figure 4 As shown, further, the support and guiding part 330 of this embodiment specifically includes: guiding grooves 331 respectively arranged on the inner walls of the left and right sides of the enclosed channel 311, and the two side edges of the single-piece product are respectively inserted into the guiding grooves 331 on both sides. In a specific structure, the vertical distance between the guiding grooves 331 matches the thickness of the single-piece product. The guiding grooves 331 extend from the open end at the rear side to the open end at the front side, so as to penetrate through the inner wall of the entire enclosed channel 311 along the conveying direction, so that the two side edges of the single-piece product can be inserted into the guiding grooves 331 on both sides, and the single-piece product is horizontally placed in the enclosed channel 311. The transmission assembly 400 pushes the single-piece product between the guiding grooves 331 on both sides, so that the single-piece product moves from the rear to the front in the guiding grooves 331. A plurality of guiding grooves 331 of this embodiment are arranged in the vertical direction, and the plurality of guiding grooves 331 are respectively used for inserting a plurality of single-piece products, so that a plurality of single-piece products arranged at intervals in the up-down direction can be pushed at one time for baking simultaneously, realizing batch baking and improving the baking efficiency.

[0066] As Figure 2 , Figure 4As shown in the figure, further, the transmission component 400 of this embodiment specifically includes: a chain drive member 410 and a plurality of push plates 420. The chain 411 of the chain drive member 410 has an upper chain segment 413 and a lower chain segment 414 extending along the conveying direction. The head and tail of the upper chain segment 413 and the lower chain segment 414 are connected to the sprocket through an arc segment to achieve transmission. The chain 411 is arranged inside the heat conduction bin housing 310, so that the upper chain segment 413 passes through the enclosed bin channel 311, and the lower chain segment 414 is located outside the heat conduction bin housing 310. A plurality of push plates 420 are arranged at intervals on the chain 411, and move into the enclosed bin channel 311 in sequence through the movement of the chain 411 to push single-piece products. In a specific structure, connecting plates are arranged on the chain 411. The connecting plates are fixed on the links of the chain 411 and can move with the chain 411. The push plates 420 are fixedly arranged on the connecting plates in the vertical direction. The push plates 420 extend in the up and down directions. In this way, after the push plates 420 follow the rotation of the chain 411 and turn into the enclosed bin channel 311, the push plates 420 can push all the single-piece products in multiple layers in the up and down directions; the length, width and height of the push plates 420 can be designed according to the size of the enclosed bin channel 311. The closer the length, width and height of the push plates 420 are to the size of the enclosed bin channel 311, the more air circulation can be blocked. By blocking air circulation, the influence of air circulation on temperature can be reduced, and the temperature in the baking space formed between adjacent push plates 420 can be more stable. If the difference between the length, width and height of the push plates 420 and the size of the enclosed bin channel 311 is larger, the air circulation can be increased to make the air flow faster. The smooth air flow helps the temperature to be consistent, and the temperature in the baking space formed between adjacent push plates 420 can be more consistent.

[0067] As Figure 2 , Figure 4 shown in the figure, further, the transmission component 400 of this embodiment further includes a cushion block 412. The cushion block 412 is arranged inside the enclosed bin channel 311 and is located between the upper chain segment 413 and the inner bottom surface of the heat conduction bin housing 310 to support the upper chain segment 413. The cushion block 412 can be made of plastic parts, so as to effectively support the upper chain segment 413, avoid the friction between the chain 411 and the heat conduction bin housing 310, avoid the wear of the metal structure, and make the operation of the chain drive member 410 more stable.

[0068] It should be noted that for the case where a plurality of baking bins 300 are arranged side by side in the left and right directions inside the baking channel 210, a plurality of chains 411 can be correspondingly arranged on a single chain drive shaft. Push plates 420 are arranged on the plurality of chains 411 arranged side by side in the left and right directions and are respectively arranged in different baking bins 300.

[0069] Embodiment Two

[0070] As Figure 1 , Figure 5As shown, the structure of the high-efficiency tunnel furnace in this embodiment is provided with a box-out input component 500 or / and a box-loading output component 700 on the basis of the first embodiment. Thus, the single-piece product can be automatically loaded and unloaded from the placement frame, and the placement frame does not enter the baking chamber, but circulates outside the heating chamber. The placement frame does not absorb heat, effectively reducing the heating energy consumption. For the convenience of structural description, in this embodiment, a box-out input component 500 is provided at the input end of the baking channel 210. The box-out input component 500 is used to push the single-piece product to be baked out of the placement frame so that the single-piece product enters the enclosed channel 311. And a box-loading output component 700 is provided at the output end of the baking channel 210. The box-loading output component 700 is used to send the baked single-piece product from the enclosed channel 311 into the placement frame.

[0071] As Figure 1 、 Figure 5 shown, further, the box-out input component 500 of this embodiment specifically includes: a first box body moving member 510 and a pushing cylinder 520. The first box body moving member 510 is used to move the placement frame from the storage area to the opening at the input end of the enclosed channel 311. The storage area is the area near the input end of the enclosed channel 311, which is mainly used to place the placement frame. The single-piece products to be baked are inserted into the placement frame at intervals in the vertical direction. Through the first box body moving member 510, the placement frame filled with the single-piece products to be baked can be transported. The transport direction can be various. For example, the storage area can be located on the left or right side of the input end of the enclosed channel 311, and in this application, the storage area is arranged at the rear lower part of the input end of the enclosed channel 311, so as to make full use of the space under the frame 100 for storage and optimize the structure. A push plate 521 is connected to the piston rod of the pushing cylinder 520. The push plate 521 moves towards the opening at the input end of the enclosed channel 311 under the drive of the pushing cylinder 520 to push the single-piece product in the placement frame from the placement frame onto the support and guiding portion 330 of the enclosed channel 311.

[0072] As Figure 5 、 Figure 6As shown in FIGS. (a)-(d), when the placement frame filled with single-piece products to be baked is moved from the storage area to the input opening of the enclosed bin channel 311 by the first box body moving member 510, the pushing cylinder 520 is activated, and the push plate 521 is pushed from the back to the front. The forward-moving push plate 521 enters the placement frame from the rear side of the placement frame, thereby pushing the single-piece products in the placement frame into the support and guiding portion 330 of the enclosed bin channel 311 all at once. It should be noted that the single-piece products on the placement frame conveyed by the first box body moving member 510 are aligned with the guiding groove 331, so that the push plate 521 can accurately push multiple stacked single-piece products into the multi-layer guiding groove 331 all at once. Then, the push plate 521 is retracted by the pushing cylinder 520, and the empty placement frame is moved away by the first box body moving member 510, so as not to interfere with the movement of the chain driving member 410 driving the pushing plate 420.

[0073] As Figure 5 shown, further, the first box body moving member 510 of this embodiment specifically includes: a first double-speed chain conveyor line 511 and a first lifting table 512. The first double-speed chain conveyor line 511 is arranged below the pushing cylinder 520 and conveys the placement frame filled with single-piece products towards the input opening of the enclosed bin channel 311. The first lifting table 512 is movably arranged in the vertical direction between the output end of the first double-speed chain conveyor line 511 and the input end of the enclosed bin channel 311, and is used to receive the placement frame filled with single-piece products output by the first double-speed chain conveyor line 511 and convey the placement frame filled with single-piece products upwards to the input end of the enclosed bin channel 311. In the specific structure, as Figure 6 shown in FIGS. (a) and (b), the storage area is located at the rear end of the first double-speed chain conveyor line 511. When the placement frame filled with single-piece products is placed at the rear end of the first double-speed chain conveyor line 511, the placement frame is moved along the direction from the back to the front by the first double-speed chain conveyor line 511 and conveyed onto the first lifting table 512. As Figure 6 shown in FIGS. (c) and (d), the first lifting table 512 rises, lifting the placement frame to be aligned with the input end of the enclosed bin channel 311, so that the push plate 521 can be driven by the pushing cylinder 520 to push the single-piece products in the placement frame into the support and guiding portion 330 of the enclosed bin channel 311 all at once.

[0074] As Figure 5 、 Figure 6As shown, a lifting and blocking mechanism 530 is provided between the first double-speed chain conveyor line 511 and the first lifting platform 512. When the first lifting platform 512 has not reached the lower position, the lifting and blocking mechanism 530 is located at the output end of the first double-speed chain conveyor line 511 to block the placement frame on the first double-speed chain conveyor line 511. When the first lifting platform 512 descends to the lower position, the lifting and blocking mechanism 530 descends, so that the channel between the first double-speed chain conveyor line 511 and the first lifting platform 512 is opened, and thus the placement frame on the first double-speed chain conveyor line 511 can be smoothly pushed onto the first lifting platform 512.

[0075] Figure 6 As shown in Figures (c) and (d), a limit through-hole 513 is provided on the first lifting platform 512, and a spacer post 540 is fixedly arranged vertically on the frame 100. When the first lifting platform 512 descends to the lower position, the fixed spacer post 540 is inserted into the limit through-hole 513 to penetrate the first lifting platform 512 and protrude from the surface of the first lifting platform 512. In this way, a limit area is formed between the spacer posts 540 arranged in the left-right direction, so that the placement frame conveyed by the first double-speed chain conveyor line 511 can be moved into the limit area through the alignment of the spacer posts 540, and thus can be aligned with the guide groove 331 in the surrounding bin channel 311 in the left-right direction. Then, by the upward movement of the first lifting platform 512, the placement frame is aligned with the guide groove 331 in the surrounding bin channel 311 in the up-down direction.

[0076] As Figure 1 、 Figure 2 、 Figure 5As shown in the figure, further, the box loading and output component 700 of this embodiment specifically includes: a second box body moving member 710 and an auxiliary box loading member 720. The second box body moving member 710 is used to set an empty placement frame. The auxiliary box loading member 720 is arranged at the output end opening of the enclosed bin channel 311. The auxiliary box loading member 720 is used to push the single baked product from the output end opening of the enclosed bin channel 311 into the placement frame on the second box body moving member 710. The second box body moving member 710 moves the placement frame carrying the single product from the output end opening of the enclosed bin channel 311 to the completion area, where the single product carried in the placement frame is the baked product. In the specific structure, since the transmission component 400 adopts a chain transmission member 410, when the single product in the enclosed bin channel 311 is pushed forward by the push plate 420 and is about to reach the position of the output end opening of the enclosed bin channel 311, the push plate 420 will flip downward under the drive of the chain 411. This will cause the upper single product not to be pushed and unable to reach the second box body moving member 710 on the front side. Therefore, through the auxiliary box loading member 720, before the push plate 420 flips downward, it replaces the function of the push plate 420 to push from back to front. Under the action of the auxiliary box loading member 720, multiple single products arranged in the up and down direction are still pushed forward out of the output end opening of the enclosed bin channel 311 and smoothly pushed onto the empty placement frame on the second box body moving member 710. Then, the second box body moving member 710 moves the placement frame filled with the baked single product to the completion area.

[0077] As Figure 5 shown in the figure, further, the second box body moving member 710 of this embodiment specifically includes: a second lifting platform 711 and a second double-speed chain conveyor line 712. The second lifting platform 711 is movably arranged in the up and down direction at the output end of the enclosed bin channel 311 and receives the baked single product pushed out by the auxiliary box loading member 720 from the output end of the enclosed bin channel 311 through the empty placement frame. The second double-speed chain conveyor line 712 is arranged on one side of the second lifting platform 711 and conveys the placement frame loaded with the baked single product from the second lifting platform 711 to the completion area. The specific structures of the second lifting platform 711 and the second double-speed chain conveyor line 712 can refer to the structures of the first double-speed chain conveyor line 511 and the first lifting platform 512 above. The two structures are similar, but are respectively arranged at the input end and the output end of the enclosed bin channel 311.

[0078] As Figure 2 、 Figure 5 、 Figure 8As shown in the figure, further, the auxiliary box-in component of this embodiment specifically includes: a front pusher 730, an auxiliary lifting component 740, and an auxiliary horizontal pusher component 750. The auxiliary lifting component 740 is connected to the front pusher 730 to drive the front pusher 730 to move up or down. The auxiliary horizontal pusher component 750 is connected to the auxiliary lifting component 740 to drive the auxiliary lifting component 740 to move toward the second box body moving member 710. The front pusher 730 is driven by the auxiliary lifting component 740 to move up into the enclosed bin channel 311 and is located on one side of the single-piece product after baking facing the input end of the enclosed bin channel 311. Driven by the auxiliary horizontal pusher component 750, the single-piece product at the opening of the output end of the enclosed bin channel 311 is pushed out from the opening of the output end of the enclosed bin channel 311 into the placement frame.

[0079] As Figure 5 , Figure 8 shown in the figure, the front pusher 730 is arranged at the output end of the enclosed bin channel 311. Specifically, it can be a column 732 arranged on the front push lifting plate 731. There is a clearance section arranged below the front end of the heat-conducting bin shell 310. The column 732 can be inserted into the enclosed bin channel 311 through the clearance section and is located at the rear of the frontmost stack of single-piece products. The auxiliary lifting component 740 specifically includes an auxiliary base 741, an auxiliary lifting cylinder 742, and a vertical guiding member 743. The auxiliary base 741 is connected to the auxiliary horizontal pusher component 750 and can move back and forth driven by the auxiliary horizontal pusher component 750. The auxiliary lifting cylinder 742 is fixedly arranged on the auxiliary base 741. The vertical guiding member 743 is arranged on the left and right sides of the auxiliary base 741. The auxiliary lifting cylinder 742 drives the front push lifting plate 731 to move in the up and down direction, and the left and right sides of the front push lifting plate 731 slide through the vertical guiding member 743, so that the column 732 on the front push lifting plate 731 can move in the up and down direction. The auxiliary horizontal pusher component 750 specifically includes: a linear slide 751 and a horizontal guiding member 752. The auxiliary base 741 is fixedly arranged on the linear slide 751 and moves in the front and rear direction driven by the linear slide 751 and under the guiding action of the horizontal guiding member 752. The linear slide 751 can be a ball screw structure.

[0080] As Figure 1 , Figure 5 shown in the figure, further, a box body conveying component 600 is arranged between the box-out input component 500 and the box-in output component 700 of this embodiment. The box body conveying component 600 is used to convey the empty placement frame on the box-out input component 500 to the box-in output component 700. In this way, while the single-piece product is being baked, the empty placement frame can also be conveyed from the back to the front, realizing the automatic loading and unloading of the single-piece product.

[0081] As Figure 5As shown, further, the cassette conveying assembly 600 of this embodiment specifically includes: a first belt line 610, a second belt line 620, a third belt line 630, and a cassette pusher 640. The first belt line 610 is arranged on the cassette output input assembly 500 and is used to convey the placement frame towards the outside of the furnace shell 200. The second belt line 620 is arranged on the outside of the furnace shell 200 and extends along the conveying direction. The head end of the second belt line 620 is docked with the output end of the first belt line 610. The third belt line 630 is arranged on the cassette output assembly 700 and is used to convey the placement frame towards the inside of the furnace shell 200. The third belt line 630 is docked with the tail end of the second belt line 620. The cassette pusher 640 is arranged at the tail end of the second belt line 620 and is used to push the placement frame at the tail end of the second belt line 620 onto the third belt line 630. For the convenience of structural description, taking the cassette conveying assembly 600 being arranged on the right side outside the furnace shell 200 as an example for structural explanation, in the specific structure, the first belt line 610 can be arranged on the front and rear side edges of the first lifting platform 512. In this way, the middle part of the first lifting platform 512 can carry the placement frame, and the front and rear side parts abut against the lower part of the placement frame and convey the placement frame. The conveying direction of the first belt line 610 is from left to right. The second belt line 620 is arranged on the right side outside the furnace shell 200, and the conveying direction of the second belt line 620 is from back to front. The first lifting platform 512 can directly convey the placement frame from left to right to the rear end of the second belt line 620, convey the placement frame forward through the second belt line 620. When reaching the front end of the second belt line 620, the cassette pusher 640 pushes the placement frame towards the left, so as to push the placement frame onto the third belt line 630. The third belt line 630 is arranged on the front and rear side edges of the second lifting platform 711. The placement frame is conveyed along from right to left through the third belt line 630, so that the empty placement frame is sent to the position corresponding to the front end of the enclosed bin channel 311.

[0082] In this embodiment, the surface of the second belt line 620 is flush with the rising positions of the first lifting platform 512 and the second lifting platform 711. When the lower first double-speed chain conveyor line 511 moves the placing frame in the direction from the back to the front and conveys it onto the first lifting platform 512, the first lifting platform 512 rises to the rising position to align the placing frame with the input end of the enclosed bin channel 311. The pushing cylinder 520 drives the push plate 521 to push the single-piece products in the placing frame into the supporting and guiding part 330 of the enclosed bin channel 311 at one time. Then the pushing cylinder 520 drives the push plate 521 to retract. The first belt line 610 on the first lifting platform 512 starts and directly conveys the placing frame from left to right to the rear end of the second belt line 620. The second belt line 620 conveys the placing frame forward. When it reaches the front end of the second belt line 620, at this time the second lifting platform 711 is in the rising position. The box pushing member 640 pushes the placing frame towards the left, so as to push the placing frame onto the third belt line 630 of the second lifting platform 711. The placing frame is conveyed along from right to left through the third belt line 630, so that the empty placing frame is sent to the corresponding position opposite to the front end of the enclosed bin channel 311, and the empty placing frame receives the baked single-piece products pushed out from the front end of the enclosed bin channel 311 by the auxiliary box-feeding member 720. When the placing frame is full, the second lifting platform 711 descends to the lower position and docks with the second double-speed chain conveyor line 712. The second double-speed chain conveyor line 712 conveys the placing frame filled with the baked single-piece products from the second lifting platform 711 to the completion area.

[0083] As Figure 1 , Figure 9 shown, further, an air suction and cooling assembly 800 is provided at the top of the furnace shell 200 of this embodiment. The air suction and cooling assembly 800 is used to suck the waste gas in the baking channel 210 and the enclosed bin channel 311. Some single-piece products will generate waste gas of solder and ink during baking. If the staff breathe these waste gases for a long time, it will have an adverse impact on the body. And the traditional baking uses an oven for baking, with low efficiency and the generated waste gas is difficult to discharge. Therefore, the air suction and cooling assembly 800 can extract the waste gas in the enclosed bin channel 311 regularly or randomly, so that the waste gas can be discharged and treated in time.

[0084] As Figure 9As shown, further, the air intake cooling assembly 800 of this embodiment specifically includes: an exhaust duct 810 and a cooler 820. The exhaust duct 810 communicates with the baking channel 210 and the surrounding bin channel 311. For example, a through hole is opened on the upper surface of the heat-conducting bin shell 310 to achieve communication with the exhaust duct 810. The cooler 820 communicates with the exhaust duct 810 to extract waste gas. After working for a period of time, stains will remain on the inner wall of the cooler 820. Therefore, an active scraper 830 is provided on one side of the cooler 820 of this embodiment. The active scraper 830 is connected to a pushing power member 840. The active scraper 830 moves along the inner cavity of the cooler 820 driven by the pushing power member 840 to clean the inner cavity of the cooler 820. The pushing power member 840 can be an electric push rod or a cylinder, etc.

[0085] Embodiment III

[0086] This embodiment provides a baking method for an efficient tunnel furnace, which is applied to the efficient tunnel furnace as described above. The baking method includes the steps:

[0087] Step S100: Push the single-piece product to be baked out of the placement frame through the out-box input assembly at the input end of the baking channel, so that the single-piece product enters the surrounding bin channel.

[0088] Step S200: The single-piece product on the support and guiding part in the surrounding bin channel is pushed by the transmission assembly that moves in a cycle in the surrounding bin channel, so that multiple batches of single-piece products move and are baked in the surrounding bin channel in a pipeline manner along the conveying direction. The surrounding bin channel is heated by a heating element.

[0089] In the specific process, only the single-piece product is baked, avoiding the problems of slow heating efficiency, uneven baking heat reception, and waste of heating energy caused by heating the placement frame together.

[0090] Step S300: The box body conveying assembly is used to convey the empty placement frame on the out-box input assembly to the in-box output assembly.

[0091] Step S400: The in-box output assembly sends the baked single-piece product from the surrounding bin channel into the empty placement frame.

[0092] In the specific process, the out-box input assembly pushes the single-piece product to be baked out of the placement frame so that the single-piece product enters the surrounding bin channel. The empty placement frame is conveyed by the box body conveying assembly from the out-box input assembly to the in-box output assembly, and the in-box output assembly then sends the baked single-piece product from the surrounding bin channel into the placement frame. Thus, through the above process, the automatic loading and unloading of the single-piece product from the placement frame can be realized, saving labor costs, having a high degree of automation, and improving the baking efficiency.

[0093] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An efficient tunnel furnace, characterized in that, Comprising: A furnace shell, which encloses a baking channel that extends along the conveying direction; At least one baking bin, which is arranged in the baking channel along the conveying direction and encloses an enclosed bin channel. Both the input end and the output end of the enclosed bin channel are open, and a support and guiding part is arranged in the baking bin to support the single-piece product to be baked; A heating element, which is arranged on the baking bin to supply heat to the enclosed bin channel; A transmission assembly, which is arranged through the enclosed bin channel and moves in a cycle to push multiple batches of the single-piece products in a pipeline manner, so that multiple batches of the single-piece products move on the support and guiding part in sequence.

2. The high-efficiency tunnel furnace according to claim 1, wherein The baking bin includes: a heat-conducting bin shell, both the input end and the output end of which are open to form the enclosed bin channel inside the heat-conducting bin shell; The heating element is arranged on the outer wall of the heat-conducting bin shell, and bakes the single-piece product through the heat conduction of the heat-conducting bin shell; The support and guiding part includes: guiding grooves respectively arranged on the inner walls on both sides of the enclosed bin channel, and the two side edges of the single-piece product are respectively inserted into the guiding grooves on both sides.

3. The high-efficiency tunnel furnace according to claim 2, wherein The transmission assembly includes: a chain drive part, the chain of which has an upper chain segment and a lower chain segment that extend along the conveying direction. The chain is arranged inside the heat-conducting bin shell, so that the upper chain segment is arranged through the enclosed bin channel and the lower chain segment is located outside the heat-conducting bin shell; A plurality of pushing plates, which are arranged on the chain at intervals and move into the enclosed bin channel in sequence through the movement of the chain to push the single-piece product; The transmission assembly further includes: a cushion block, which is arranged in the enclosed bin channel and is located between the upper chain segment and the inner bottom surface of the heat-conducting bin shell to support the upper chain segment.

4. The high-efficiency tunnel furnace according to claim 1, wherein An out-box input assembly is arranged at the input end of the baking channel, and the out-box input assembly is used to push the single-piece product to be baked out of the placing basket so that the single-piece product enters the enclosed bin channel; A box-loading output assembly is arranged at the output end of the baking channel, and the box-loading output assembly is used to send the baked single-piece product from the enclosed bin channel into the placing basket.

5. The high-efficiency tunnel furnace according to claim 4, wherein The out-box input assembly includes: a first box body moving part, which is used to move the placing basket from the storage area to the opening at the input end of the enclosed bin channel; A pushing air cylinder, a push plate is connected to the piston rod of the pushing air cylinder, and the push plate moves towards the opening at the input end of the enclosed bin channel through the drive of the pushing air cylinder to push the single-piece product in the placing basket into the support and guiding part of the enclosed bin channel; The first box body moving part includes: a first double-speed chain conveyor line, which is arranged below the pushing air cylinder and conveys the placing basket containing the single-piece product towards the opening at the input end of the enclosed bin channel. The first lifting table is movably arranged in the vertical direction between the output end of the first double-speed chain conveyor line and the input end of the enclosed bin path, and is used to receive the placement basket containing single-piece products output by the first double-speed chain conveyor line, and convey the placement basket containing single-piece products upward to the input end of the enclosed bin path.

6. The high-efficiency tunnel furnace according to claim 5, wherein, The box loading and output assembly includes: a second box moving member for arranging an empty placement basket. The auxiliary box loading member is arranged at the opening of the output end of the enclosed bin path and is used to push the single-piece baked product from the opening of the output end of the enclosed bin path into the placement basket on the second box moving member. The second box moving member moves the placement basket carrying the single-piece product from the opening of the output end of the enclosed bin path to the completion area. The second box moving member includes: a second lifting table movably arranged in the vertical direction at the output end of the enclosed bin path, and receiving the single-piece baked product pushed out by the auxiliary box loading member from the output end of the enclosed bin path through the empty placement basket. A second double-speed chain conveyor line is arranged on one side of the second lifting table and conveys the placement basket containing the single-piece baked product from the second lifting table to the completion area.

7. The high-efficiency tunnel furnace according to claim 6, characterized in that, The auxiliary box loading assembly includes: a front pushing member arranged at the input end of the enclosed bin path. An auxiliary lifting assembly is connected to the front pushing member to drive the front pushing member to rise or fall. An auxiliary horizontal pushing assembly is connected to the auxiliary lifting assembly to drive the auxiliary lifting assembly to move towards the second box moving member. The front pushing member is driven by the auxiliary lifting assembly to move upward into the enclosed bin path and is located on the side of the single-piece baked product facing the input end of the enclosed bin path. Driven by the auxiliary horizontal pushing assembly, the single-piece product at the opening of the output end of the enclosed bin path is pushed out from the opening of the output end of the enclosed bin path into the placement basket.

8. The high-efficiency tunnel furnace according to claim 4, characterized in that A box conveyor assembly is arranged between the box unloading and input assembly and the box loading and output assembly, and is used to convey the empty placement basket on the box unloading and input assembly to the box loading and output assembly. The box conveyor assembly includes: a first belt line arranged on the box unloading and input assembly and used to convey the placement basket towards the outside of the furnace shell. A second belt line is arranged on the outside of the furnace shell and extends along the conveying direction. The head end of the second belt line is docked with the output end of the first belt line. A third belt line is arranged on the box loading and output assembly and used to convey the placement basket towards the inside of the furnace shell. The third belt line is docked with the tail end of the second belt line. A box pushing member is arranged at the tail end of the second belt line and is used to push the placement basket at the tail end of the second belt line onto the third belt line.

9. The high-efficiency tunnel furnace according to claim 8, wherein, An air suction and cooling assembly is provided at the top of the furnace shell, and the air suction and cooling assembly is used to suck the waste gas in the baking channel and the surrounding bin channel; The air suction and cooling assembly includes: an air extraction pipe, and the air extraction pipe communicates with the baking channel and the surrounding bin channel; A cooler, and the cooler communicates with the air extraction pipe to extract waste gas; An active scraper is arranged on one side of the cooler, the active scraper is connected to a pushing power member, and the active scraper moves along the inner cavity of the cooler through the drive of the pushing power member to clean the inner cavity of the cooler.

10. A baking method for an efficient tunnel furnace, characterized in that, Applied to the high-efficiency tunnel furnace according to any one of claims 1-9, wherein the baking method includes the steps: Through the out-of-box input assembly at the input end of the baking channel, the single-piece product to be baked is pushed out of the placement frame so that the single-piece product enters the surrounding bin channel; The single-piece products on the support and guiding part in the surrounding bin channel are pushed by the transmission assembly that circulates in the surrounding bin channel, so that multiple batches of the single-piece products move and are baked in the surrounding bin channel in a pipeline manner along the conveying direction, wherein the surrounding bin channel is heated by a heating member; The box body conveying assembly is used to convey the empty placement frame on the out-of-box input assembly to the in-box output assembly; Through the in-box output assembly, the baked single-piece product is sent into the empty placement frame from the surrounding bin channel.

Images