CN211518277U - Crosslinked polyolefin foaming device - Google Patents

Abstract

The utility model discloses a crosslinked polyolefin foaming device, which comprises a vertical furnace for sheets to pass through for heating and foaming, wherein the vertical furnace is internally provided with a heating system and a spreading roller mechanism arranged on two opposite side walls of the vertical furnace; the roller unfolding mechanism comprises a first unfolding roller and a second unfolding roller; one end of each of the first spreading roller and the second spreading roller is positioned in the vertical furnace, the other end of each of the first spreading roller and the second spreading roller is positioned outside the vertical furnace, and a sealing structure is arranged at the joint of each of the first spreading roller and the second spreading roller and the vertical furnace and is arranged in the side wall of the vertical furnace; the utility model discloses an improve perpendicular stove in and exhibition roller mechanism, realize totally sealedly in the department of meeting of exhibition roller mechanism and oven.

Description

Crosslinked polyolefin foaming device

Technical Field

The utility model belongs to the technical field of the foaming device, more specifically relates to a crosslinked polyolefin foaming device.

Background

The polyolefin plastic has wide application range, good physical, chemical and mechanical properties, good toughness, flexibility and buffering performance, electrical insulation, heat insulation and other properties, and is widely applied to the fields of packaging, chemical engineering, buildings and the like. The polyolefin foam plastic is widely applied and is one of the foam plastics which are successfully prepared at the earliest time, and the polyolefin foam material is usually foamed by a foaming furnace in the production process.

The existing foaming furnace mainly has two structures, one is a foaming furnace taking a vertical furnace as a foaming section, and the other is a horizontal furnace arranged in front of the vertical furnace and formed by matching the horizontal furnace and the vertical furnace. In the second mode, the whole foaming furnace is in a square shape, the horizontal furnace mainly provides preheating for the polyolefin master slice, and after the polyolefin master slice is heated by different temperature intervals, the polyolefin master slice reaching the vertical furnace has certain temperature, so that the foaming is facilitated, and the foaming quality is improved; the vertical furnace is a polyolefin master slice foaming section and is a main foaming finishing station.

However, the horizontal oven of the conventional foaming oven has the following problems:

firstly, when the polyolefin master slice is foamed in a vertical furnace, the expansion in thickness and width can occur to cause the slices to be in an M shape, and the master slice is in a semi-molten state at the moment, if the master slice is not unfolded in time, the slices can be mutually overlapped and adhered to cause product scrapping or uneven heating, the quality of a finished product is influenced, and therefore the master slice needs to be unfolded in time through an unfolding roller mechanism. The foaming furnace belongs to a long-term high-temperature environment, and the spreading roller moves horizontally except for rotating, so that a set of complete and effective sealing or leakage-proof device is not provided on the one hand due to the spreading roller structure in the prior art; on the other hand, the conventional polytetrafluoroethylene and other rubber and plastic materials are poor in high temperature, easy to deform and poor in sealing effect, and oil smoke generated during sheet foaming can be leaked, so that indoor air pollution, serious equipment abrasion, serious corrosion and heat energy loss in a vertical furnace are caused.

Secondly, the transmission device adopts chain type conveying, and the defects of the mode are that on one hand, a chain is easy to damage, the efficiency is low, and scrap iron is easy to fall after abrasion; meanwhile, the chain lock catch is easy to fall off and fall into the transmission equipment, so that the equipment is damaged.

In addition, the heating device in the existing vertical furnace is mostly heating rods which are uniformly distributed on the inner wall of the vertical furnace body, and the heat radiation generated by the heating rods heats the sheets in the vertical furnace. More advanced, the heating device in the vertical furnace adopts temperature zone control, so that the vertical furnace has a reasonable temperature gradient distribution longitudinally. However, in the prior art, each temperature zone of the heating device is arranged inside the through vertical furnace hearth (there is no shielding between each temperature zone), so that each temperature zone is affected with each other, and the temperature of each temperature zone cannot be accurately controlled. Meanwhile, the inner space of the vertical furnace hearth is large, heat generated by the heating device cannot be well utilized, the heating speed is low, and the heating efficiency is low.

SUMMERY OF THE UTILITY MODEL

To the above defect or improvement demand of prior art, the utility model provides a crosslinked polyolefin foaming device through improving perpendicular stove in and exhibition roller mechanism, realizes totally sealedly in the department of meeting of exhibition roller mechanism and oven.

In order to achieve the above object, the present invention provides a crosslinked polyolefin foaming device, comprising a vertical furnace for allowing a sheet to pass through for heated foaming, wherein the vertical furnace is provided with a spreading roller mechanism arranged on two opposite side walls; and the number of the first and second electrodes,

the roller unfolding mechanism comprises a first unfolding roller and a second unfolding roller; one end of the first spreading roller and one end of the second spreading roller are located in the vertical furnace, the other end of the first spreading roller and the other end of the second spreading roller are located outside the vertical furnace, and a sealing structure is arranged at the joint of the first spreading roller and the vertical furnace.

Further, the sealing structure is arranged inside the vertical furnace side wall, and the first unfolding roller sequentially penetrates through the sealing cover, the first sealing ring, the second sealing ring and the sealing ring.

Further, the second spreading roller sequentially penetrates through the fully-sealed steel plate and the second sealing ring.

Furthermore, the first sealing ring and the second sealing ring are made of high-temperature resistant mica plates and graphite.

Further, the outer end parts of the first spreading roller and the second spreading roller are provided with corresponding rotary joints, and each rotary joint comprises a cold water inlet and a hot water outlet in different directions.

Further, this foaming device still including locate perpendicular stove top horizontal stove, be equipped with drive mechanism in the horizontal stove, just drive mechanism includes drive roll, driven roll to and communicate with both so as to form the conveying mesh belt of closed loop conveying.

Furthermore, the bottom of the conveying mesh belt is provided with a driven roller support, the two transverse sides of the driven roller support are provided with U-shaped plates, and the U-shaped plates are respectively fixed with a telescopic device.

Further, still have heating system in the perpendicular stove, heating system includes transition mechanism, prefoaming mechanism and the foaming mechanism that from top to bottom interval arrangement in proper order to form independent warm section.

The feeding device comprises an unwinding frame and a feeding traction roller for drawing the foamed sheet on the unwinding frame to the transmission mechanism.

And the discharging device comprises a calender roll, a cooling roll, a deviation rectifying roll, a winding frame and at least one pair of material receiving traction rolls which are arranged at the outlet of the vertical furnace and are sequentially distributed.

Generally, through the utility model discloses above technical scheme who conceives compares with prior art, can gain following beneficial effect:

(1) the utility model discloses a crosslinked polyolefin foaming device, the expansion roller is in the wall body gets into the foaming furnace, adopts totally closed seal structure, reaches the periphery through totally closed steel sheet on the one hand and seals, at import and the exit position that the roller mechanism got into the wall body of exhibition, designs sealing washer, sealing ring and sealed lid in proper order and realizes totally closed environment, not only makes the semi-manufactured goods of foaming when foaming, reduces the oil smoke, reaches the leak protection effect, but also has reduced the wearing and tearing of equipment.

(2) The utility model discloses a crosslinked polyolefin foaming device, through setting up first accommodation space, second accommodation space, third accommodation space and make the sheet heating foaming progressively in proper order, be favorable to the foaming more even, and relatively independent between the three, can reduce the influence each other between each warm area, and then improve the temperature control precision of each warm area, simultaneously, concentrate the heat in the space that relative furnace is littleer, can improve thermal utilization ratio, it is fast to have a rate of heating, efficient advantage.

(3) The utility model discloses a crosslinked polyolefin foaming device, drive mechanism adopt conveying mesh belt and drive roll and driven roller cooperation closed loop to carry, drive the guipure conveying through power roller and guipure frictional force, replace the transmission scheme of drive chain, gear, guide rail, have solved the problem that chain and guide rail friction produced iron fillings slag foam, avoid the greasy dirt.

(4) The utility model discloses a crosslinked polyolefin foaming device, exhibition roller mechanism, sealing washer adopt high temperature resistant mica plate, graphite, light in weight, high temperature deformation minimum, corrosion-resistant, mechanical strength height, workable.

(5) The utility model discloses a crosslinked polyolefin foaming device is used for the opening that the sheet passes through in first accommodation space, second accommodation space, the third accommodation space, increases in proper order under upwards, is favorable to suiting with the expansion of sheet at the in-process that heats the foaming, when guaranteeing hot-blast not too much outflow, has avoided the sheet to block again in above-mentioned feed inlet or discharge gate at the removal in-process.

Drawings

FIG. 1 is a schematic view of an overall cross-linked polyolefin foaming device according to an embodiment of the present invention;

fig. 2 is a top view of a transmission mechanism of a cross-linked polyolefin foaming device according to an embodiment of the present invention;

fig. 3 is a front view of a transmission mechanism related to a cross-linked polyolefin foaming device according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a heating system related to a cross-linked polyolefin foaming device according to an embodiment of the present invention.

Fig. 5 is a mounting position diagram of a stretching roller mechanism related to a cross-linked polyolefin foaming device according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a spreading roller mechanism related to a cross-linked polyolefin foaming device according to an embodiment of the present invention;

fig. 7 is an enlarged view of a sealing structure related to the roll spreading mechanism according to the embodiment of the present invention;

fig. 8 is a partial enlarged view of the roll spreading mechanism of fig. 6 according to the embodiment of the present invention;

fig. 9 is a schematic view of a rotary joint structure related to a roll spreading mechanism according to an embodiment of the present invention;

in all the figures, the same reference numerals denote the same features, in particular: 1-unreeling frame, 2-feeding traction roller, 3-transmission mechanism, 4-horizontal furnace, 5-hot air recovery device, 6-vertical furnace, 7-spreading roller mechanism, 8-suction cup, 9-polishing roller, 10-cooling roller, 11-receiving traction roller, 12-deviation correction roller and 13-reeling frame;

301-driving roller, 302-driven roller, 303-conveying mesh belt, 304-driven roller bracket, 305-telescoping device, 306-first transmission shaft, 307-bearing, 308-variable frequency motor, 309-chain wheel, 310-transmission chain, 311-U-shaped plate, 312-rolling bearing, 313-positioning screw rod and 314-driving roller bracket;

61-transition mechanism, 62-pre-foaming mechanism, 63-foaming mechanism and 64-furnace body; 611-a first shell, 612-a first accommodating space, 613-a transition feeding hole, 614-a transition discharging hole, 615-a first hot air channel, 616-a first air inlet, 617-a first air outlet, 618-a first fan and 619-a first heating rod group; 621-a second shell, 622-a second accommodating space, 623-a pre-foaming feeding hole, 624-a pre-foaming discharging hole, 625-a second hot air channel, 626-a second air inlet, 627-a second air outlet, 628-a second fan and 629-a second heating rod group; 631-a third shell, 632-a third accommodating space, 633-a foaming feeding hole, 634-a foaming discharging hole, 635-a third hot air channel, 636-a third air inlet, 637-a third air outlet, 638-a third fan and 639-a third heating rod group; 641-vertical feed inlet, 642-vertical discharge outlet;

701-a first unwinding roller, 702-a second unwinding roller, 703-a sealing structure, 704-a belt seat bearing, 705-a transmission chain wheel, 706-a transmission chain, 707-a motor, 708-a rotary joint, 709-a bearing seat, 710-a bearing and 711-a synchronous gear; 7031-full seal steel plate, 7032-first seal ring, 7033-seal cover, 7034-second seal ring, 7035-seal ring; 7081 cold water inlet, 7082 hot water outlet.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Fig. 1 is an overall schematic diagram of a cross-linked polyolefin foaming device according to an embodiment of the present invention. As shown in figure 1, the cross-linked polyolefin foaming device of the utility model comprises a horizontal furnace 4 and a vertical furnace 6 for the sheet material to be sequentially foamed by heating, and the vertical furnace 6 is arranged below the horizontal furnace 4. The sheet after being unreeled by the unreeling frame 1 is sent to a horizontal furnace 4 through a feeding traction 2, is uniformly preheated in the horizontal direction, and then enters a vertical furnace 6 in the vertical direction for foaming, so that the whole foamed sheet is uniformly heated, expanded and foamed. The foaming sheet material includes the polyolefin sheet material that has crosslinked, the utility model discloses a foaming device is used for linking the foaming of polyolefin.

The horizontal furnace 4 can be of a split structure and comprises a plurality of sections of independent hearths, an interval is arranged between every two adjacent hearths to arrange a cold air device, and the intermittent heating of the foaming sheet is realized through the arrangement of the hearths and the cold air device. The inlet and outlet of the horizontal furnace 4 for the foaming sheet to enter and exit are respectively positioned on the hearths at the two ends.

The horizontal furnace 4 is internally provided with a transmission mechanism 3 to horizontally convey the foaming sheets, and the foaming sheets sequentially pass through each section of hearth on the transmission mechanism 3 and finally enter the vertical furnace 6. Fig. 2 and fig. 3 are a top view and a front view of a transmission mechanism related to the foaming device of the present invention, respectively. The transmission mechanism 3 comprises a driving roller 301 and a driven roller 302, and a conveying mesh belt 303 for communicating the driving roller 301 with the driven roller 302, wherein the conveying mesh belt 303 is annularly arranged on the driving roller 301 and the driven roller 302 at two ends, so that the conveying mesh belt 303 forms a closed-loop conveying form between the driving roller 301 and the driven roller 302. Wherein, drive roll 301 center is equipped with first transmission shaft 306, through cup jointing fixed connection between drive roll 301 and the first transmission shaft 306, the horizontal both sides of first transmission shaft 306 all are equipped with bearing 307, and first transmission shaft 306 and bearing 307 through cup jointing fixed connection, in addition preferably, drive roll 301 bottom is equipped with drive roll support 314 and is used for fixed drive roll 301. The driven roller 302 is provided with a second transmission shaft, the driven roller 302 is fixedly connected with the second rotating shaft through a sleeve, and the second transmission shaft is fixedly connected with the rolling bearing 312 through a sleeve.

Further, one end of the first transmission shaft 306 passes through the bearing 307, and the top of the first transmission shaft 306 extends out of the bearing 307 by a certain distance, and is used for arranging a chain wheel 309 at the top of the first transmission shaft 306, and the chain wheel 309 is connected with a variable frequency motor 308 through a transmission chain 310. One end of the variable frequency motor 308 is provided with a transmission chain wheel, and the transmission chain 310 realizes transmission through the chain wheel 309 and the transmission chain wheel on the variable frequency motor 308.

Further, a driven roller bracket 304 is arranged at the bottom of the conveying mesh belt 303, U-shaped plates 311 are arranged on both lateral sides of the driven roller bracket 304, and telescopic devices 305 are respectively fixed on the U-shaped plates 311 on both sides, so that the telescopic devices 305 are also arranged on both lateral sides of the conveying mesh belt 303, wherein one end of the telescopic device 305 is fixedly connected with the U-shaped plate 311 on the bracket, and the other end is fixedly connected with a rolling bearing 312 of the driven roller 302. The rolling bearing 312 is preferably a slidable rolling bearing device, and a positioning screw 313 is longitudinally provided in the rolling bearing 312.

The telescopic device 305 is used for pushing the slidable rolling bearing 312 to move on the U-shaped plate 311 along the longitudinal direction, so that the position of the driven roller 302 is changed, and the effect of adjusting the tension degree of the conveying mesh belt 303 is achieved; after the tension of the conveying mesh belt 303 reaches the requirement, the positioning screw 313 is longitudinally inserted to fix the rolling bearing 312 and the expansion device 305, so that stable rolling friction is generated between the conveying mesh belt with the proper tension and the driving roller and the driven roller.

Of course, the transmission speed of the conveying mesh belt 303 is adjusted by a control system, the relative speed of the driving roller 301 and the driven roller 302 needs to be properly adjusted, the conveying efficiency is increased, and meanwhile, the sheet is prevented from moving and shifting on the conveying mesh belt, so that the sheet is uniformly conveyed on the conveying mesh belt, the sheet is ensured not to shift when entering a subsequent foaming link, the foaming in the subsequent step is uniform, no adhesion or fracture occurs, and the yield is finally improved.

Preferably, the telescopic device is an adjusting cylinder, but other telescopic devices can be selected, and tension can be generated to ensure that the driven roller 302 and the conveying mesh belt 303 are tensioned.

Preferably, the mesh size of the conveying mesh belt 303 is 80-200 meshes, and the shape is square, diamond, rectangle, or the like. If the meshes of the conveying mesh belt 303 are smaller than 80 meshes, when the sheet is conveyed by a steel mesh, the sheet is not easy to be heated, so that the foaming effect of the sheet is influenced, and meanwhile, the whole mesh belt is too heavy, the load of a transmission motor is large, and the mesh belt is easy to damage; if the mesh of the conveying mesh belt 303 is larger than 200 meshes, the mesh belt is easy to pull and deform, and the sheet transmission is influenced.

When the transmission mechanism 3 works, the tension of the expansion device 305 is tightened, the expansion device 305 pushes the slidable rolling bearing 312 to move longitudinally on the U-shaped plate 311, so that the position of the driven roller 302 is changed, the tension of the conveying mesh belt 303 is adjusted, and after the tension meets the set requirement, the positioning screw rod 313 is tightly inserted to fix the rolling bearing 312 and the expansion device 305; acting on the driven roller 302 through a second transmission shaft in the driven roller 302 to enable the driven roller 302, the driving roller 301 and the conveying mesh belt 303 to be tightly attached, wherein the conveying mesh belt 303 with proper tension degree generates rolling friction force with the driving roller 301 and the driven roller 302; then, the foamed sheet is placed on a conveyor belt 303 for transmission, a variable frequency motor 308 drives a transmission chain 310 through a transmission chain wheel, the transmission of the transmission chain 310 drives the chain wheel 309 to rotate, and then drives a first transmission shaft 306, so that the driving roller 301 rotates along a bearing 307; the conveying mesh belt 303 connects the driving roller 301 and the driven roller 302, so that the driving roller 301 operates and the driven roller 302 operates correspondingly, the conveying mesh belt 303 is driven to convey by the friction force of the driving roller 301, the driven roller 302 and the conveying mesh belt 3, and the conveying mesh belt 303 is driven to perform closed-loop operation, thereby achieving the purpose of conveying the foaming material.

Further, as shown in fig. 1, 4 and 9, the vertical furnace 6 includes a furnace body 644, a heating system, and a roll spreading mechanism. The upper end of the furnace body 644 is provided with an inlet 641 which is communicated with the outlet of the horizontal furnace, and the sheet material output from the outlet of the horizontal furnace 4 enters the vertical furnace 6 from the inlet 641 and is conveyed downwards in a vertical state under the action of gravity; the lower end of the furnace body 644 is provided with an outlet 642 which is communicated with the inlet 641 for outputting the sheet material.

Wherein the heating system is arranged in the furnace body 644 so as to form a heating field for the foamed sheet to pass through in the furnace body 644. As shown in fig. 4, the heating system includes a transition mechanism 61, a pre-foaming mechanism 62 and a foaming mechanism 63, which are arranged from top to bottom at intervals.

Specifically, the transition mechanism 61 includes an external first shell 611, a first accommodating space 612 is defined inside the first shell 611, first hot air channels 615 are respectively arranged on two lateral sides of the first accommodating space 612, and the first shell 611 is suspended inside the furnace through the support of the first hot air channels 615; the upper end and the lower end of the first shell 611 are respectively provided with a transition feed inlet 613 and a transition discharge outlet 614 which are communicated with the first accommodating space 612; one end of the first hot air channel 615 is provided with a first air inlet 616 communicated with the hearth, and the other end is provided with a first air outlet 617 communicated with the first accommodating space 612; the end part of the first hot air channel 615 close to the first air inlet 616 is fixedly connected with the furnace body 64, and the end part close to the first air outlet 617 is fixedly connected with the first shell 611; a first fan 618 is arranged at one side of the interior of the first hot air channel 615, which is close to the first air inlet 616, and a first heating rod group 619 is arranged at one side of the interior of the first hot air channel 615, which is close to the first air outlet 617;

the transition mechanism 62 includes a second housing 621, a second accommodating space 622 is defined inside the second housing 621, second hot air channels 625 are respectively disposed on two lateral sides of the second accommodating space 622, and the second housing 621 is suspended inside the furnace chamber by the support of the second hot air channels 625; the upper end and the lower end of the second housing 621 are respectively provided with a pre-foaming feed inlet 623 and a pre-foaming discharge outlet 624 which are communicated with the second accommodating space 622; one end of the second hot air channel 625 is provided with a second air inlet 626 communicated with the hearth, the other end is provided with a second air outlet 627 communicated with the second accommodating space 622, one end part of the second hot air channel 625 close to the second air inlet 626 is fixedly connected with the furnace body 64, and one end part close to the second air outlet 627 is fixedly connected with the second shell 621; a second fan 628 is disposed at a side of the second hot air channel 625, which is close to the second air inlet 626, and a second heating rod group 629 is disposed at a side of the second air outlet 627;

the foaming mechanism 63 includes a third casing 631, a third accommodating space 632 is defined inside the third casing 631, third hot air channels 635 are respectively disposed at two lateral sides of the third accommodating space 632, and the third casing 631 is suspended inside the furnace chamber by the support of the third hot air channels 635; the upper and lower sides of the third casing 631 are respectively provided with a foaming inlet 633 and a foaming outlet 634 communicated with the third receiving space 632; one end of the third hot air channel 635 is provided with a third air inlet 636 communicated with the furnace chamber, and the other end is provided with a third air outlet 637 communicated with the third accommodating space 632; the end part of the third hot air channel 635 close to the third air inlet 636 is fixedly connected with the furnace body 64, and the end part close to the third air outlet 637 is fixedly connected with the third casing 631; a third fan 638 is disposed inside the third hot air duct 635 near the third air inlet 636, and a third heating rod set 639 is disposed near the third air outlet 637.

It should be noted that the transition feed port 613 and the transition discharge port 614 are aligned with the vertical feed port 641 and the vertical discharge port 642 on the furnace body 64; the pre-foaming feed inlet 623 and the pre-foaming discharge outlet 624 are aligned with the vertical feed inlet 641 and the vertical discharge outlet 642 on the furnace body 64; the foaming inlet 633 and the foaming outlet 634 are aligned with the vertical inlet 641 and the vertical outlet 642 of the furnace body 64.

Preferably, the transition feed port 613, the transition discharge port 614, the pre-foaming feed port 623, the pre-foaming discharge port 624, the foaming feed port 633 and the foaming discharge port 634 are in non-contact with the sheet, and the openings are sequentially increased, so that the expansion of the sheet in the heating foaming process is facilitated to be adapted, and the sheet is prevented from being clamped in the feed port or the discharge port in the moving process while hot air is prevented from flowing out too much.

Preferably, the total power of the first heater bar set 619 is less than the total power of the second heater bar set 629, and the total power of the second heater bar set 629 is less than the total power of the third heater bar set 639.

Preferably, the first hot air duct 615 is symmetrically disposed at two lateral sides of the first accommodating space 612, the second hot air duct 625 is symmetrically disposed at two lateral sides of the second accommodating space 622, and the third hot air duct 635 is symmetrically disposed at two lateral sides of the third accommodating space 632.

As shown in fig. 5, the spreading roller mechanisms 7 are respectively disposed at two opposite side walls of the vertical foaming heating device in an inclined manner, and include at least one pair of spreading rollers disposed in the oven body 64 to nip and spread the foamed sheet. The two expansion rollers are positioned on both sides of the foamed sheet in the furnace body 64, and can expand and clamp the foamed sheet.

Specifically, as shown in fig. 6, the spreading roller mechanism 7 includes a first spreading roller 701 and a second spreading roller 702 with two different lengths, and is used for clamping and spreading the foamed sheet, wherein one end of the first spreading roller 701 and one end of the second spreading roller 702 are located inside the vertical furnace 6, the other end of the first spreading roller 701 and the other end of the second spreading roller 702 are located outside the vertical furnace 6, a sealing structure 703 is arranged at a joint of the spreading roller mechanism 7 and the vertical furnace 6, and the sealing structure 703 is arranged inside a side wall of the vertical furnace 6. As shown in fig. 7, the sealing structure 703 includes a full-sealing steel plate 7031, a first sealing ring 7032, a sealing cover 7033, a second sealing ring 7034, and a sealing ring 7035.

The fully-sealed steel plate 7031 is formed by processing and assembling a plurality of A3 steel plates, and a boss-shaped first sealing ring 7032 is arranged at the joint of the fully-sealed steel plate 7031 and the first unfolding roller 701, so that the fully-sealed steel plate 7031 is not in direct contact with the first unfolding roller 701; the first sealing ring 7032 comprises a boss structure and a cylinder structure, the boss structure is pressed on one side of the fully-sealed steel plate 7031, a sealing cover 7033 is arranged on the boss structure, and the first sealing ring 7032 is fixed with the fully-sealed steel plate 7031 through the sealing cover 7033; the inner side of the fully-sealed steel plate 7031 is provided with a second sealing ring 7034, and the second sealing ring 7034 is in seamless close contact with the inner side of the fully-sealed steel plate 7031. The inner side of the second sealing ring 7034 is provided with a sealing ring 7035, and the cylindrical structure of the first sealing ring 7032 sequentially passes through the second sealing ring 7034 and the sealing ring 7035.

The first unwinding roller 701 sequentially passes through the sealing cover 7033, the first sealing ring 7032, the second sealing ring 7034 and the sealing ring 7035 from outside to inside, wherein the first unwinding roller 701 is not in direct contact with the second sealing ring 7034 and the sealing ring 7035. The seal cap 7033 and the seal ring 7035 are fixed to each other by bolts.

The second unwinding roller 702 penetrates through the fully-sealed steel plate 7031 and a second sealing ring 7034, the second sealing ring 7034 can rotate around a sealing ring 7035, and the second unwinding roller 702 synchronously displaces the second sealing ring 7034 when the second unwinding roller 702 performs relative displacement by taking the first unwinding roller 701 as an axis.

In the embodiment of the present invention, the fully-sealed steel plate 7031 is preferably two layers, and certainly, it is within the protection scope of the present invention to provide more than two layers, so that, on one hand, the oil smoke generated by the foamed sheet does not leak through at least two groups of seals, thereby achieving a good sealing effect; on the other hand, the heat energy in the vertical furnace can not be lost.

Preferably, the first sealing ring 7032 and the second sealing ring 7034 are made of high-temperature resistant mica plates and graphite, and have high temperature resistance, high machining performance and high strength. Because of the second expandes roller 702 and need use first expansion roller 701 to do relative displacement as the axle center, the selection and the structure of sealing material have very big influence to sealed effect, the utility model discloses the sealed at least two sets of sealing washer structures of adopting of exhibition roller mechanism chooses for use above-mentioned material preparation to form, and light in weight, high temperature deformation are minimum, corrosion-resistant, mechanical strength is high, workable, and in addition the expansion roller is made with special material, and high temperature deflection is also minimum, and the whole operation of expansion mechanism is stable like this, is convenient for seal.

Preferably, the first spreading roller 701 and the second spreading roller 702 are made of high temperature resistant and corrosion resistant hollow bars.

The utility model discloses an exhibition roller mechanism 7, the expansion roller is in the wall body gets into the foaming furnace, adopts totally closed seal structure, reaches the periphery through totally closed steel sheet on the one hand and seals, at the import and the exit position that exhibition roller mechanism got into the wall body, designs sealing washer, sealing ring and sealed lid in proper order and realizes totally closed environment, not only makes the semi-manufactured goods of foaming when foaming, reduces the oil smoke, reaches the leak protection effect, but also has reduced the wearing and tearing of equipment.

One end of the fully-sealed steel plate 7031 extends out of the vertical foaming furnace wall and is provided with at least two bearings with seats 704, and the bearings with seats 704 are connected with a first unfolding roller 701 arranged outside the furnace wall. The first and second unwinding rollers 701 and 702 provided outside the furnace wall are further provided with an integrated synchronizing gear 711 and an integrated bearing pedestal 709 at the outside thereof, and the first and second unwinding rollers 701 and 702 are connected, wherein the bearing pedestal 709 is preferably two. Each bearing block 709 is provided with at least two sets of bearings 710, at least one set for fixing the first unwinding roller 701 and at least one set for fixing the second unwinding roller 702.

The utility model discloses an exhibition roller mechanism 7, first expansion roller 701 is connected with rolling bearing 704 and bearing frame 705 simultaneously, make first expansion roller 701 can only be rotatory at fixed position, bearing frame 705 then can make rotary displacement around first expansion roller 701, consequently the second of installing simultaneously on bearing frame 705 expandes roller 702 also corresponding production rotary displacement, thereby make first expansion roller 701 and second expand the ascending clearance in the vertical direction between the roller 702 and change, the foaming sheet produces different frictional force because of the clearance change when passing in the middle of first expansion roller 701 and the second expansion roller 702.

The first unwinding roller 701 is provided with a transmission chain wheel 705, and the transmission chain wheel 705 is connected with an output shaft on a motor 707 through a transmission chain 706 to form a transmission system. The motor 707 is preferably a geared variable frequency reduction motor. The transmission system of the spreading roller mechanism is powered by a motor 707 to drive the first spreading roller 701 to rotate, then the first spreading roller 701 and the second spreading roller 702 are enabled to generate outward-inward opposite rotation through a synchronizing gear 711, and when a foaming sheet passes through the middle of the first spreading roller 701 and the second spreading roller 702, the spreading rollers rotating in opposite directions and the foaming sheet are spread towards the two sides of the foaming sheet under the action of friction force; and the foamed sheet is unfolded in a flat plate shape and is conveyed downwards in the vertical furnace in the middle by adjusting the rotating speed of the opposite spreading roller mechanisms on the two sides of the vertical foaming furnace wall and the relative position of the second spreading roller 702, so that the effect of continuous and stable production is achieved. The utility model discloses an exhibition roller mechanism, motor pass through the sprocket and are connected the transmission with the expansion roller, make two expansion rollers to opposite rotary motion through the synchromesh gear meshing, carry out the expanding to foaming sheet semi-manufactured goods.

Preferably, as shown in fig. 9, the tops of the outer ends of the furnace walls of the first and second unrolling rollers 701 and 702 are respectively provided with corresponding rotary joints 708, and the rotary joints comprise cold water inlets 801 and hot water outlets 802 in different directions. The cold water inlet 801 is used for introducing cooling water into the hollow first spreading roller 701 and the hollow second spreading roller 702, and the water after heat exchange flows out through the hot water outlet 802. The circulating water cooling of the rotary unfolding roller is realized through the rotary joint 708, and the foaming sheet is prevented from being adhered to the unfolding roller.

To sum up, the utility model discloses an exhibition roller mechanism has solved the foaming sheet and has overlapped the adhesion each other in perpendicular stove and cause the finished product quality problem that the goods was scrapped and the inequality of being heated brought, has improved the yield of goods. Meanwhile, a brand new sealing technology is adopted, so that air pollution, equipment corrosion and heat energy loss of a production place caused by oil smoke leakage are avoided, and the effects of energy conservation and consumption reduction are achieved. The high-temperature resistant mica plate, graphite and other materials are adopted, and meanwhile, a sealing structure is innovated, so that the characteristics of high temperature resistance and easy deformation are overcome, and the sealing performance is good.

Preferably, the foaming furnace of the present invention further comprises an adsorption mechanism disposed at the outlet 642 of the furnace body 64, and the adsorption mechanism further adsorbs and expands the foaming sheet. In this embodiment, the suction mechanism includes suction cups 8 disposed at one side of the foamed sheet at the outlet 642 of the oven body 64. The suction cups 8 may be provided with one or more according to the width of the foamed sheet.

Preferably, the utility model discloses a foaming furnace still includes the hot-blast recovery unit 5 of setting between vertical furnace 6 and horizontal furnace 4 for will be from the hot-blast recovery that flows out above the furnace body 64 of vertical furnace 6 and carry back in the furnace body 21, reach energy-conserving purpose.

As shown in fig. 1, further, the foaming furnace of the present invention further comprises a feeding device for conveying the foamed sheet to the horizontal furnace 4 and a discharging device for drawing the foamed sheet out of the vertical furnace 6. The feeding device comprises an unreeling frame 1 and a feeding traction roller 2 which is used for drawing the foaming sheet on the unreeling frame 1 to a transmission mechanism 3 in a horizontal furnace 4. The feeding traction roller 2 is arranged between the unreeling stand 1 and the horizontal furnace 4 in the conveying direction of the foamed sheet.

The discharging device comprises a calender roll 9, a cooling roll 10, a deviation rectifying roll 12 and a winding frame 14 which are arranged at the outlet 642 of the furnace body 61 of the vertical furnace 6 and are sequentially arranged along the output direction of the foaming sheet, and at least one pair of material receiving traction rolls 11. The receiving traction roller 11 is arranged at one or more positions among the calender roller 9 and the cooling roller 10, the cooling roller 10 and the rectification roller 12 and the winding frame 13, and is used for drawing the foaming sheet. The foamed sheet output from the vertical furnace 6 is rolled on a rolling frame 13 after being sequentially subjected to calendaring and shaping by a calendaring roller 9, cooling and traction by a cooling roller 10 and deviation rectification by a deviation rectification roller 12.

When the foaming furnace of the utility model works, the crosslinked polyolefin sheet (roll-shaped) is loaded on the unreeling frame 1, and is sent into the horizontal furnace 4 after unreeling through the feeding traction roller 2; the polyolefin sheet enters the vertical furnace 6 after being preheated and foamed by the horizontal furnace 4, is foamed and unfolded, is output from the lower part of the vertical furnace 6, passes through the discharging device and is wound on the winding frame 13.

It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the scope of the present invention.

Claims (10)

1. A crosslinked polyolefin foaming apparatus comprising a vertical furnace (6) through which a sheet is passed to be foamed by heating, characterized in that the vertical furnace (6) has spreading roller mechanisms (7) provided therein at opposite side walls thereof; and the number of the first and second electrodes,

the roller unfolding mechanism (7) comprises a first unfolding roller (701) and a second unfolding roller (702); one end of the first spreading roller (701) and one end of the second spreading roller (702) are positioned inside the vertical furnace (6), the other end of the first spreading roller is positioned outside the vertical furnace (6), and a sealing structure (703) is arranged at the joint of the first spreading roller and the vertical furnace (6).

2. The crosslinked polyolefin foaming device according to claim 1, wherein the sealing structure (703) is provided inside the side wall of the vertical furnace (6), and the first unwinding roller (701) passes through a sealing cover (7033), a first sealing ring (7032), a second sealing ring (7034) and a sealing ring (7035) in sequence.

3. The crosslinked polyolefin foaming device according to claim 2, wherein the second unwinding roller (702) passes through a full sealing steel plate (7031) and a second sealing ring (7034) in sequence.

4. The foaming device of claim 3, wherein the first sealing ring (7032) and the second sealing ring (7034) are made of high temperature resistant mica plates or graphite materials.

5. The crosslinked polyolefin foaming device according to claim 4, wherein the outer ends of the first unwinding roller (701) and the second unwinding roller (702) are provided with corresponding rotary joints (708), each rotary joint (708) comprising a cold water inlet (7081) and a hot water outlet (7082) in different directions.

6. The foaming apparatus according to claim 1 or 5, further comprising a horizontal furnace (4) disposed above the vertical furnace (6), wherein the horizontal furnace (4) is provided with a transmission mechanism (3), and the transmission mechanism comprises a driving roller (301), a driven roller (302), and a conveying mesh belt (303) communicating the two to form a closed-loop conveying.

7. The foaming apparatus for crosslinked polyolefin according to claim 6, wherein the bottom of the conveyer belt (303) is provided with a driven roller support (304), the driven roller support (304) is provided with U-shaped plates (311) at both lateral sides, and the U-shaped plates (311) are respectively fixed with a telescopic device (305).

8. The apparatus for foaming crosslinked polyolefin according to claim 1 or 7, wherein the vertical furnace (6) further comprises a heating system, and the heating system comprises a transition mechanism (61), a pre-foaming mechanism (62) and a foaming mechanism (63) which are sequentially arranged from top to bottom at intervals to form independent temperature sections.

9. The apparatus for foaming crosslinked polyolefin according to claim 8, further comprising a feeding device comprising an unwinding frame (1) and a feeding pulling roll (2) for pulling the foamed sheet on the unwinding frame (1) to the transmission mechanism (3).

10. The crosslinked polyolefin foaming device according to claim 1 or 9, further comprising a discharging device for drawing the foamed sheet out of the vertical furnace (6), wherein the discharging device comprises a calender roll (9), a cooling roll (10), a rectification roll (12), a winding frame (13) and at least one pair of receiving drawing rolls (11) which are arranged at the outlet of the vertical furnace (6) in sequence.

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