CN113739568A

CN113739568A - Double-layer stepping tunnel furnace device and using method

Info

Publication number: CN113739568A
Application number: CN202111039695.0A
Authority: CN
Inventors: 黄灵林; 王海峰; 宋卓
Original assignee: Shenzhen Yixian Technology Co ltd
Current assignee: Shenzhen Yixian Technology Co ltd
Priority date: 2021-09-06
Filing date: 2021-09-06
Publication date: 2021-12-03

Abstract

The invention relates to a double-layer stepping tunnel furnace device and a using method thereof, wherein the double-layer stepping tunnel furnace device comprises a furnace body and a lifting platform, the front side and the rear side of the furnace body are respectively connected with the lifting platform, and the furnace body comprises a plurality of heating units which are sequentially connected; lifting platform includes fixed frame and arranges the crane in fixed frame, and the both sides of crane are provided with pulley, pneumatic cylinder, guide pulley and wire rope, the cylinder of pneumatic cylinder and the bottom fixed connection of fixed frame, and the pulley is connected to the piston rod of pneumatic cylinder, and guide pulley fixed mounting is in the bottom of crane, and the bottom of crane is connected to wire rope one end, and the other end is walked around behind guide pulley and the pulley and can be dismantled with the crane and be connected, and the inboard of crane is provided with a pair of guide rail that can move. According to the double-layer stepping tunnel furnace, the upper layer and the lower layer of baking intervals are adopted in the furnace, so that the baking amount of the transfer trolley can be doubled, and the working efficiency is greatly improved. The heat conduction can be effectively utilized, and the heat utilization rate is improved.

Description

Double-layer stepping tunnel furnace device and using method

Technical Field

The invention relates to a double-layer stepping tunnel furnace device and a using method thereof, in particular to heating and curing equipment used in the field of full lamination, and belongs to the technical field of full lamination process equipment.

Background

The full-lamination technology is to laminate the display panel and the touch panel or the glass cover plate together seamlessly and completely by using water glue or optical glue. The technology is widely applied to small and medium-sized display terminal products such as mobile phones, flat plates, vehicles and the like. Along with the gradual increase of the size of display terminal products, the demands of electronic terminal products such as business displays, education, meetings and the like on full lamination are increasing day by day.

After the product is attached by optical cement, heating and curing are needed. In order to guarantee the thickness and the uniformity of the adhesive layer, the attached product and the attaching platform are required to be fed into the tunnel furnace together for heating. The tunnel furnace may be classified into a box type, a chamber type and a pass type according to its external structure, wherein the pass type is suitable for mass production line production. The attached product passes through a stepping hot air tunnel furnace at a certain speed. However, the baking tunnel is too long, which results in too large floor space of the equipment, and causes great limitation to the arrangement of production sites and the number of the equipment, so that the production benefit cannot be further improved. Meanwhile, the tunnel furnace with the single-layer channel cannot fully utilize heating facilities in the tunnel furnace, so that energy and space waste is caused.

Chinese patent document CN210987922U discloses a heating device for double-deck tunnel furnace, including skin and inlayer, form the heating chamber between skin and the inlayer, the inside of inlayer is toasting the chamber, toast the bottom setting in chamber and install the track, the heating chamber is provided with a set of electric heating board, sets up in the heating chamber and installs supplementary heat conduction device, supplementary heat conduction device includes two sets of flabellums, the top and the bottom in heating chamber are installed in the flabellum setting, and the flabellum is by motor drive. The utility model relates to a simple structure, it is effectual to keep warm, and the heating degree of consistency is high double-deck tunnel furnace is with heating device. But this heating furnace is applicable to food processing, accomplishes the tunnel type mechanical equipment that food toasted through convection current, radiation, but can't use in full laminating technical field, can't guarantee the stability of transfer platform truck in the walking process, can't guarantee the homogeneity of glue thermosetting.

Based on this, need urgently to design and develop a double-deck marching type tunnel furnace device, can improve work efficiency, increase the thermosetting efficiency of glue simultaneously, can guarantee the thermosetting effect of glue again.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a double-layer stepping tunnel furnace device which can greatly improve the working efficiency of heating and curing and can also improve the heat utilization rate in the furnace.

The invention also provides a using method of the double-layer stepping tunnel furnace device.

The technical scheme of the invention is as follows:

a double-layer stepping tunnel furnace device comprises a furnace body and a lifting platform, wherein the front side and the rear side of the furnace body are respectively connected with the lifting platform, and the furnace body comprises a plurality of heating units which are sequentially connected;

the heating unit comprises a frame body, the frame body is of an upper-layer and lower-layer structure, and the upper layer and the lower layer are respectively provided with an upper layer guide rail and a lower layer guide rail;

lifting platform includes fixed frame and arranges the crane in fixed frame, and the both sides of crane are provided with pulley, pneumatic cylinder, guide pulley and wire rope, the cylinder of pneumatic cylinder and the bottom fixed connection of fixed frame, and the pulley is connected to the piston rod of pneumatic cylinder, and guide pulley fixed mounting is in the bottom of crane, and the bottom of crane is connected to wire rope one end, and the other end is walked around behind guide pulley and the pulley and can be dismantled with the crane and be connected, and the inboard of crane is provided with a pair of guide rail that can move.

Preferably, four guide posts are symmetrically arranged on two sides of the fixing frame, the four guide posts penetrate through two sides of the lifting frame, and the lifting frame is connected with the four guide posts in a sliding mode. The advantage of this design is, the stability when the crane oscilaltion can be guaranteed to the guide pillar to guarantee to transport the stability of transporting platform truck and laminating product entirely.

Preferably, the upper layer guide rail, the lower layer guide rail and the movable guide rail are all V-shaped guide rails.

Preferably, the bottom of the movable guide rail is provided with a retainer, the retainer is internally provided with a roller, the inner side of the lifting frame is also provided with an electric push rod, and the electric push rod is fixedly connected with a vertical plate at the bottom of the movable guide rail.

Preferably, the two ends of the upper layer guide rail, the lower layer guide rail and the movable guide rail are respectively provided with a convex tip and a concave notch, and the convex tips can be inserted into the concave notches to realize tight fit.

Preferably, the heating unit is connected with the heating unit through bolts, and mounting holes connected through bolts are formed in the frame body. The design has the advantages that the length of the tunnel furnace can be designed according to the process requirements, and furnace bodies with different lengths are formed by connecting different numbers of heating units, so that different process requirements are met.

Preferably, the frame body is formed by splicing or welding 100 square steels and adopts a three-transverse and three-longitudinal connecting mode. The advantage of this design is, the combination of stand and crossbeam can guarantee to reduce the occupation to tunnel furnace cavity space on the basis of satisfying support intensity to improve the heat homogeneity in the tunnel furnace.

Preferably, the lifting frame is C-shaped, adopts a truss structure and is formed by splicing 100 square steels.

Preferably, the furnace body is sequentially provided with a feeding port door, a front pneumatic door, a rear pneumatic door and a discharging port door from front to back; heating wires are arranged on two sides of the furnace body, a plurality of air supply wind wheels are arranged at the top of the furnace body and driven by an air supply motor, circulating motion chains are respectively arranged on the upper layer and the lower layer of the furnace body, and a plurality of baffles are arranged on the circulating motion chains.

Preferably, the heating wires are porous spherical heating wires, the heating wires on two sides of the furnace body are symmetrically arranged, and the heating wires adjacent to each other in the front and the back are equidistant. The advantage of this design is, generate heat simultaneously through the furnace body both sides heater, can guarantee the thermal homogeneity in the furnace chamber, through air supply wind wheel with the hot-blast disturbance in the furnace chamber, guarantee to the at utmost that the heat flows in the furnace chamber, make in the furnace chamber be in the constant temperature state all the time.

Preferably, the feeding port door and the discharging port door are both manually controlled electric gates, and the front pneumatic door and the rear pneumatic door are both automatic pneumatic doors.

Preferably, the furnace chamber area between the feeding port door and the front pneumatic door is a preheating area, the furnace chamber area between the rear pneumatic door and the discharging port door is a natural cooling area, and the furnace chamber area between the front pneumatic door and the rear pneumatic door is a constant temperature heating area.

Preferably, the inner side of the lifting frame is also provided with a circulating movement chain, and the circulating movement chain is provided with a plurality of baffle plates.

Preferably, the circulating motion chain is wound around a driving wheel and a driven wheel at two ends, and the driving wheel is driven by an alternating current speed regulating motor. The advantage of this design is that, by the rotatory motion of AC speed regulating motor drive circulation motion chain, baffle on the chain promotes the transport platform truck and gos forward in crane or furnace chamber.

Preferably, an alarm photoelectric switch is installed at a discharge port of the furnace body, and a temperature acquisition module is installed in the furnace chamber.

Preferably, the tunnel furnace further comprises a PLC controller and a fine-tuning temperature control system, the automatic pneumatic door, the alternating current speed regulating motor, the alarm photoelectric switch and the electric push rod are all connected with the PLC controller, and the temperature acquisition module and the air supply motor are all connected with the fine-tuning temperature control system. The advantage of this design is, realizes transporting the automation mechanized operation of the transfer platform truck in-process of marcing through the PLC controller, and automatic opening door, closing door and automatic the advancing realize the regulation of furnace intracavity temperature through fine-tuning temperature control system.

A use method of a double-layer stepping tunnel furnace device comprises the following steps:

1) the tunnel furnace starts to operate, the preheating zone and the constant temperature zone of the furnace body are driven by the program of the fine-tuning temperature control system, and the temperature in the preheating zone and the constant temperature zone reaches a set value;

2) pushing a first transfer trolley on which the full-lamination module is placed to a material inlet door, opening the material inlet door, pushing the first transfer trolley into a preheating zone, placing the first transfer trolley above a circulating motion chain at the moment, and then closing the material inlet door;

3) under the program drive of a PLC (programmable logic controller), a front pneumatic door is opened, a circulating motion chain rotates to send a first transfer trolley in a preheating zone into a lower constant-temperature heating zone, and then the front pneumatic door is closed;

4) pushing a second transfer trolley to the material inlet door, repeating the steps 2) -3), sending the second transfer trolley to the lower constant-temperature heating zone, and moving the first transfer trolley forward by one unit;

or when the fact that the initial heating position transfer trolley of the lower constant-temperature heating area does not timely flow out to the next heating position is detected, the second transfer trolley is conveyed into the upper constant-temperature heating area through the lifting platform;

5) by analogy, a plurality of transfer trolleys are sent into the constant-temperature heating area to carry out thermosetting on the glue;

6) when the first transfer trolley reaches the rear pneumatic door, the rear pneumatic door is opened under the drive of a program of the PLC, and the first transfer trolley enters a natural cooling area;

the transfer trolley on the upper layer descends through the lifting platform and then enters the natural cooling area;

7) after the natural cooling area is cooled, the discharge port door is opened, and the transfer trolley is conveyed out of the natural cooling area under the rotation action of the circulating motion chain.

The invention has the technical characteristics and beneficial effects that:

1. according to the double-layer stepping tunnel furnace, the upper layer and the lower layer of baking intervals are adopted in the furnace, so that the baking amount of the transfer trolley can be doubled, and the working efficiency is greatly improved.

2. The double-layer stepping tunnel furnace has the advantages that the space in the furnace is doubled, the heat conduction can be effectively utilized, the heat utilization rate is improved, and meanwhile, the space utilization rate of an enterprise is improved.

3. The double-layer stepping tunnel furnace is based on the current industrial control mainstream control mode PLC + touch screen man-machine operation interface, all programs, equipment operation and data acquisition and analysis are uniformly allocated and completed by the PLC, and the touch screen can display various data acquired by the equipment in time, effectively manage the equipment and set related parameters.

4. The double-layer stepping tunnel furnace is divided into a preheating zone, a constant-temperature heating zone and a natural cooling zone, and is provided with a preheating function, so that the adverse effect of glue solidification caused by excessive temperature difference inside and outside the furnace body is avoided.

5. According to the double-layer stepping tunnel furnace, the front pneumatic door and the rear pneumatic door are full-automatic pneumatic doors, and are driven by a PLC (programmable logic controller) program, so that a trolley in a constant-temperature heating area can conveniently enter or exit, and the temperature uniformity in the constant-temperature heating area is ensured.

Drawings

FIG. 1 is a schematic structural view of a frame body of a tunnel furnace;

FIG. 2 is a schematic structural view of a crane part;

FIG. 3 is a perspective view of the crane part;

FIG. 4 is a schematic structural diagram of a lifting frame in the lifting platform during operation;

FIG. 5 is a schematic structural view of the lifting frame after being lifted;

FIG. 6 is a schematic structural view of the electric putter;

FIG. 7 is a schematic view of a movable rail;

FIG. 8 is a partial schematic view of the movable rail;

FIG. 9 is a schematic structural view of a double-deck step-type tunnel furnace apparatus;

in the figure: 1-a frame body, 2-an upper guide rail, 3-a lower guide rail, 4-a lifting frame, 5-a pulley, 6-a hydraulic cylinder, 7-a guide wheel, 8-a steel wire rope, 9-a movable guide rail, 10-an electric push rod, 11-a retainer, 12-a fixed frame, 13-a guide column, 14-a transfer trolley, 15-a vertical plate, 16-a notch, 17-a convex tip and 18-a roller.

Detailed Description

The present invention will be further described by way of examples, but not limited thereto, with reference to the accompanying drawings.

Based on the improvement of the stepping tunnel furnace for thermosetting glue in the prior art, the invention provides a novel double-layer stepping tunnel furnace device, which can greatly improve the thermosetting working efficiency on the basis of the existing stepping tunnel furnace and can fully utilize the heat energy in the furnace.

Example 1:

as shown in fig. 1 to 9, the present embodiment provides a double-layer stepping tunnel furnace device, which includes a furnace body and a lifting platform, wherein the front side and the rear side of the furnace body are respectively connected to the lifting platform, and the furnace body includes a plurality of heating units connected in sequence;

the heating unit comprises a frame body 1, the frame body 1 is of an upper-layer structure and a lower-layer structure, and an upper-layer guide rail 2 and a lower-layer guide rail 3 are respectively arranged on the upper layer and the lower layer;

lifting platform includes fixed frame 12 and arranges crane 4 in fixed frame, crane 4's both sides are provided with pulley 5, pneumatic cylinder 6, guide pulley 7 and wire rope 8, pneumatic cylinder 6's cylinder and fixed frame 12's bottom fixed connection, pulley 5 is connected to the piston rod of

pneumatic cylinder

6, 7 fixed mounting of guide pulley are in crane 4's bottom, crane 4's bottom is connected to wire rope 8 one end, the other end is walked around behind guide pulley 7 and the pulley 5 and can be dismantled with crane 4 and be connected, crane 4's inboard is provided with a pair of guide rail 9 that can move.

The hydraulic cylinder 6 only needs to provide half of the lifting height of the lifting frame to lift the lifting frame to the required height (the lifting height of the other half is realized by pulling the steel wire rope, as shown in figure 5), and the hydraulic cylinder has the advantages of simple structure, good reliability of lifting action and space saving.

Specifically, the furnace body is a cuboid as a whole, a furnace chamber in the furnace body is a working area, and the furnace body is sequentially provided with a feeding port door, a front pneumatic door, a rear pneumatic door and a discharging port door from front to back; heating wires are arranged on two sides of the furnace body, a plurality of air supply wind wheels are arranged at the top of the furnace body and driven by an air supply motor, circulating motion chains are respectively arranged on the upper layer and the lower layer of the furnace body, and a plurality of baffles are arranged on the circulating motion chains.

The heating wires are porous spherical heating wires, the heating wires on two sides of the furnace body are symmetrically arranged, and the front and the back adjacent heating wires are equidistant. The heating wires on the two sides of the furnace body simultaneously heat, so that the uniformity of heat in the furnace cavity can be ensured, hot air in the furnace cavity is disturbed through the air supply wind wheel, the heat is ensured to flow in the furnace cavity to the maximum extent, and the furnace cavity is always in a constant temperature state.

The feeding port door and the discharging port door are both manually controlled electric gates, the feeding port door and the discharging port door are manually controlled to be opened and closed, and a tightly-stopping switch is arranged to guarantee safety. The front pneumatic door and the rear pneumatic door are automatic pneumatic doors which are controlled by a PLC program and operated fully automatically. The furnace chamber area between the feeding port door and the front pneumatic door is a preheating area, the furnace chamber area between the rear pneumatic door and the discharging port door is a natural cooling area, and the furnace chamber area between the front pneumatic door and the rear pneumatic door is a constant temperature heating area. The three areas are sequentially connected from front to back, and the transfer trolley sequentially advances from front to back in the operation process of the tunnel furnace.

The fixed frame 12 is a rectangular frame, and the lifting platform rises and falls up and down in the fixed frame. Four guide posts 13 are symmetrically arranged on two sides of the fixed frame 12, the four guide posts 13 penetrate through two sides of the lifting frame 11, and the lifting frame 11 is connected with the four guide posts 13 in a sliding mode. The stability of crane 4 during oscilaltion can be guaranteed to guide pillar 13 to guarantee to transport the stability of transporting the platform truck and laminating the product entirely.

In this embodiment, upper guide rail 2, lower floor's guide rail 3 and can move guide rail 9 and be the V type guide rail, cooperate with the V type wheel of transport platform truck 14 bottoms to use, guarantee that the transport platform truck is moving the in-process, and V type wheel is along V type guide rail steady advance.

The crane 4 is C style of calligraphy, adopts truss structure, is formed by 100 square steel concatenations, and its inboard bottom is provided with three longerons, installs on two longerons of both sides can move guide rail 9. The bottom of the movable guide rail is provided with a retainer 11, a roller 18 is arranged in the retainer 11, the inner side of the lifting frame 4 is also provided with an electric push rod 10, and the electric push rod 10 is fixedly connected with a vertical plate 15 at the bottom of the movable guide rail 9. The two sides of the longitudinal beam are symmetrically provided with the retainers 4, the rollers 18 in the retainers 4 are attached to the longitudinal beam, the movable guide rail 9 is positioned above the longitudinal beam, and the movable guide rail is pushed by the electric push rod 10 to move back and forth, so that the movable guide rail 9 is butted with the upper-layer guide rail 2 or the lower-layer guide rail 3.

The heating unit is connected with the heating unit through bolts, and mounting holes connected with the bolts are formed in the frame body. The length of the tunnel furnace can be designed according to the process requirements, and furnace bodies with different lengths are formed by connecting different numbers of heating units, so that different process requirements are met.

The frame body 1 is formed by splicing or welding 100 square steels and adopts a three-transverse three-longitudinal connecting mode. The combination of the upright columns and the cross beams can ensure that the occupation of the cavity space of the tunnel furnace is reduced on the basis of meeting the supporting strength, thereby improving the uniformity of heat in the tunnel furnace.

The inner side of the lifting frame is also provided with a circulating movement chain, and the circulating movement chain is provided with a plurality of baffle plates. The baffle plates on the chains push the transfer trolley to advance in the furnace chamber. The circulating motion chain is encircled on the driving wheel and the driven wheel at two ends, and the driving wheel is driven by the alternating current speed regulating motor. The alternating current speed regulating motor drives the circulating movement chain to rotate, and the baffle on the chain pushes the transfer trolley to advance in the lifting frame or the furnace chamber. The baffle plates on the chain are also arranged at equal intervals, each baffle plate rotates from the bottom surface of the chain to push the trolley to move forwards in the rotating process of the chain, and each baffle plate moves forwards by one unit distance in the constant-temperature heating area, so that the trolley moves forwards by one unit.

An alarm photoelectric switch is arranged at the discharge port of the furnace body, and a temperature acquisition module is arranged in the furnace chamber.

The tunnel furnace also comprises a PLC controller and a fine-tuning temperature control system, the automatic pneumatic door, the alternating-current speed regulating motor, the alarm photoelectric switch and the electric push rod are all connected with the PLC controller, and the temperature acquisition module and the air supply motor are all connected with the fine-tuning temperature control system. The automatic operation of the transfer trolley in the advancing process is realized through the PLC, the door is automatically opened, closed and automatically advanced, and the temperature in the furnace cavity is adjusted through the fine-tuning temperature control system.

In this embodiment, control system is based on mainstream industrial control solution PLC + touch-sensitive screen man-machine operation interface, and PLC has characteristics such as strong, the reliability is high, convenient to use, and the touch-sensitive screen can show all data gathered, and each item data, chart are surveyability to can touch operation, set for relevant parameter, both combine together, can greatly improve work efficiency, reduce working strength, guarantee that the product toasts this link and move safely, steadily. Utilize the PLC controller, realize the operation of whole double-deck tunnel furnace, at the operation in-process, PLC's control logic is the preferred pay-off to lower floor's constant temperature zone of heating to according to the productivity demand, when detecting the initial heating position product of lower floor's constant temperature zone of heating and not in time flowing out next heating position, then will treat that the thermosetting product carries the upper constant temperature zone of heating, with reduction heating position latency, improve production efficiency.

Example 2:

a double-layer step-by-step tunnel furnace device, which has the structure as in embodiment 1, and is different therefrom in that: the two ends of the upper layer guide rail 2, the lower layer guide rail 3 and the movable guide rail 9 are respectively provided with a convex tip 17 and a concave opening 16, and the convex tip 17 is inserted into the concave opening 16 to realize tight fit.

When the front and rear heating units are connected or the guide rails can be connected with the upper layer guide rail and the lower layer guide rail, the convex tip of the front guide rail can be inserted into the concave opening of the rear guide rail, and the front and rear guide rails are tightly matched.

Example 3:

a use method of a double-layer stepping tunnel furnace device utilizes the technical scheme provided by the

embodiment

1 or 2, and the working process comprises the following steps:

The above description is only for the specific embodiments of the present invention, and the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.

Claims

1. A double-layer stepping tunnel furnace device is characterized by comprising a furnace body and a lifting platform, wherein the front side and the rear side of the furnace body are respectively connected with the lifting platform, and the furnace body comprises a plurality of heating units which are sequentially connected;

2. The double-deck stepping tunnel furnace device according to claim 1, wherein four guide posts are symmetrically provided on both sides of the fixing frame, the four guide posts penetrate both sides of the elevating frame, and the elevating frame is slidably connected to the four guide posts.

3. The double-layer stepping tunnel furnace device according to claim 1, wherein a holder is arranged at the bottom of the movable guide rail, rollers are arranged in the holder, an electric push rod is further arranged at the inner side of the lifting frame, and the electric push rod is fixedly connected with a vertical plate at the bottom of the movable guide rail.

4. The double-deck stepping tunnel furnace device according to claim 3, wherein the furnace body is provided with a feed inlet door, a front pneumatic door, a rear pneumatic door and a discharge outlet door in sequence from front to rear; heating wires are arranged on two sides of the furnace body, a plurality of air supply wind wheels are arranged at the top of the furnace body and driven by an air supply motor, the upper layer and the lower layer of the furnace body are respectively provided with a circulating motion chain, and a plurality of baffles are arranged on the circulating motion chain; the feeding port door and the discharging port door are both manually controlled electric gates, and the front pneumatic door and the rear pneumatic door are both automatic pneumatic doors.

5. The double-deck stepping tunnel furnace apparatus according to claim 4, wherein the furnace chamber region between the inlet port door and the front pneumatic door is a preheating zone, the furnace chamber region between the rear pneumatic door and the outlet port door is a natural cooling zone, and the furnace chamber region between the front pneumatic door and the rear pneumatic door is a constant temperature heating zone.

6. The double-deck stepping tunnel furnace apparatus of claim 5, wherein the elevating frame is also provided with a circulating chain on the inner side thereof, and the circulating chain is provided with a plurality of baffle plates.

7. The double-deck stepping tunnel oven apparatus of claim 4 or 6, wherein said endless moving chain is looped around a driving pulley and a driven pulley at both ends, the driving pulley being driven by an ac speed-adjustable motor.

8. The double-layer stepping tunnel furnace device according to claim 7, wherein an alarm photoelectric switch is installed at a discharge port of the furnace body, and a temperature acquisition module is installed in the furnace chamber.

9. The double-deck stepping tunnel furnace device of claim 8, wherein said tunnel furnace further comprises a PLC controller and a fine-tuning temperature control system, the automatic pneumatic door, the ac speed-adjusting motor, the alarm photoelectric switch and the electric push rod are all connected with the PLC controller, and the temperature acquisition module and the air supply motor are all connected with the fine-tuning temperature control system.

10. A method of using the double-decker walking-beam tunnel furnace apparatus of any one of claims 1 to 9, comprising the steps of: