CN110871542A - Vertical continuous foaming equipment for polyolefin - Google Patents

Vertical continuous foaming equipment for polyolefin Download PDF

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Publication number
CN110871542A
CN110871542A CN201911147091.0A CN201911147091A CN110871542A CN 110871542 A CN110871542 A CN 110871542A CN 201911147091 A CN201911147091 A CN 201911147091A CN 110871542 A CN110871542 A CN 110871542A
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CN
China
Prior art keywords
foaming
vertical
polyolefin
furnace
electric heating
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Withdrawn
Application number
CN201911147091.0A
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Chinese (zh)
Inventor
李建华
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Qin Ding Mstar Technology Ltd Ningbo
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Qin Ding Mstar Technology Ltd Ningbo
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Priority to CN201911147091.0A priority Critical patent/CN110871542A/en
Publication of CN110871542A publication Critical patent/CN110871542A/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
    • B29C44/203—Expanding the moulding material in a vertical channel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3415—Heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3442—Mixing, kneading or conveying the foamable material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/56—After-treatment of articles, e.g. for altering the shape
    • B29C44/5627—After-treatment of articles, e.g. for altering the shape by mechanical deformation, e.g. crushing, embossing, stretching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/60—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/02—Supporting web roll
    • B65H18/026—Cantilever type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/08—Web-winding mechanisms
    • B65H18/10—Mechanisms in which power is applied to web-roll spindle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/18—Constructional details
    • B65H75/24—Constructional details adjustable in configuration, e.g. expansible
    • B65H75/242—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages
    • B65H75/243—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages actuated by use of a fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B29L2007/002—Panels; Plates; Sheets

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

The invention relates to vertical polyolefin continuous foaming equipment, which comprises a horizontal conveying device, a horizontal preheating device, a vertical foaming device and a thickness adjusting and winding device, wherein the horizontal conveying device is arranged on the vertical conveying device; the horizontal conveying device is used for conveying the polyolefin sheets to the horizontal preheating device, the horizontal preheating device is used for preheating the polyolefin sheets, the vertical foaming device is used for foaming the preheated polyolefin sheets, and the thickness adjusting and winding device is used for calendering and winding foamed polyolefin semi-finished products; the vertical foaming device comprises a vertical foaming furnace, wherein a transition area, a pre-foaming area and a foaming area are sequentially divided from top to bottom in the vertical foaming furnace, electric heating pipes are respectively arranged on two corresponding sides of each area, and a hot air circulating fan is arranged between each electric heating pipe and the inner wall of the vertical foaming furnace, wherein the total power of the electric heating pipes in the transition area is smaller than that of the electric heating pipes in the pre-foaming area, and the total power of the electric heating pipes in the pre-foaming area is smaller than that of the electric heating pipes in. The foaming equipment can ensure the production efficiency and the yield of products.

Description

Vertical continuous foaming equipment for polyolefin
Technical Field
The invention belongs to the field of material manufacturing, and particularly relates to vertical polyolefin continuous foaming equipment which is particularly suitable for producing ultrathin polyolefin foam materials.
Background
The polyolefin foam material has excellent physical, chemical and mechanical properties, and can be widely applied to the fields of automobiles, sports, building engineering, electronics, packaging, transportation and the like. The existing polyolefin foaming equipment comprises a horizontal conveying device, a horizontal preheating device, a vertical foaming device and an auxiliary machine device which are arranged in sequence, and the working process is as follows: firstly, a horizontal preheating device preheats a polyolefin sheet, the horizontal conveying device conveys the preheated polyolefin sheet to a vertical foaming device, the polyolefin sheet outputs a semi-finished product of the foaming sheet in the vertical foaming device, and then the polyolefin foaming sheet is wound by an auxiliary device. However, the existing polyolefin vertical foaming equipment generally adopts a mode of heating by directly irradiating and heating by a heating pipe, so that the temperature in the furnace is unstable, the temperature difference of each area is extremely large, the thickness of a foaming product is uneven, the width of the foaming product is unequal, a plurality of unqualified products are produced, and the production efficiency and the qualification rate are low.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides vertical polyolefin continuous foaming equipment which can improve the production efficiency and the qualification rate of products, has a simple structure and is convenient to install and maintain.
In order to achieve the above purposes, the invention adopts the technical scheme that: the vertical type polyolefin continuous foaming equipment comprises a horizontal type conveying device, a horizontal type preheating device, a vertical type foaming device, an unfolding device and a thickness adjusting and winding device, wherein the horizontal type conveying device is used for conveying polyolefin sheets to the horizontal type preheating device; the vertical foaming device comprises a vertical foaming furnace, wherein a transition area, a pre-foaming area and a foaming area are sequentially arranged in the vertical foaming furnace from top to bottom, electric heating pipes are respectively arranged on two corresponding sides of each area, a hot air circulating fan is arranged between each electric heating pipe and the inner wall of the vertical foaming furnace, the total power of the electric heating pipes in the transition area is smaller than that of the electric heating pipes in the pre-foaming area, and the total power of the electric heating pipes in the pre-foaming area is smaller than that of the electric heating pipes.
Further, as above-mentioned a vertical polyolefin continuous foaming equipment, the upper end of vertical foaming furnace is equipped with vertical feed inlet, and the lower extreme is equipped with vertical discharge gate.
Further, according to the above vertical polyolefin continuous foaming equipment, the horizontal preheating device comprises a horizontal preheating furnace, wherein an upper row of electric heating tubes and a lower row of electric heating tubes are arranged in the horizontal preheating furnace and used for heating the front surface and the back surface of the polyolefin sheet, and the total power of the upper row of electric heating tubes is less than that of the lower row of electric heating tubes.
Furthermore, according to the vertical polyolefin continuous foaming equipment, one end of the horizontal preheating furnace is provided with the air inlet fan used for meeting the requirement of the temperature in the furnace from bottom to high, and the other end of the horizontal preheating furnace is provided with the gas collecting hood used for discharging waste gas in the furnace.
Further, according to the above vertical polyolefin continuous foaming device, the horizontal conveying device comprises a transmission mechanism for conveying polyolefin sheets, a core-penetrating mesh belt sleeved on the transmission mechanism, and a steel mesh for bearing the polyolefin sheets on the fixed core-penetrating mesh belt.
Further, according to the above vertical polyolefin continuous foaming device, the transmission mechanism comprises a parallel guide rail arranged in the horizontal preheating furnace, and a driving sprocket and a driven sprocket which are arranged at two ends of the parallel guide rail and outside the horizontal preheating furnace.
Furthermore, as mentioned above, the unfolding device is disposed below the foaming area and includes two expansion units symmetrically disposed on the sidewall of the vertical foaming furnace, each expansion unit includes a bottom plate fixed on the sidewall of the vertical foaming furnace, a central shaft mounted on the bottom plate and capable of rotating, a transmission frame connected with the central shaft, and a first exhibition pipe and a second exhibition pipe, one end of the first exhibition pipe and one end of the second exhibition pipe are coupled with the transmission frame, and the other end of the first exhibition pipe and the other end of the second exhibition pipe penetrate through the bottom plate and enter the vertical foaming furnace.
Further, according to the vertical polyolefin continuous foaming device, the first exhibit pipe is shorter than the second exhibit pipe, and the first exhibit pipe and the second exhibit pipe are respectively connected with the second driving mechanism.
Further, as for the vertical polyolefin continuous foaming equipment, the thickness adjusting and winding device comprises a thickness adjusting device, the thickness adjusting device comprises a front calender and a back calender, the front calender comprises a first frame, and a first transmission steering mechanism, a first heating mechanism and a front calendering mechanism which are sequentially arranged on the first frame from top to bottom; the reverse side calender comprises a second frame, and a reverse side calendering mechanism, a heating mechanism and a second transmission steering mechanism which are sequentially arranged on the second frame from top to bottom.
Further, as above-mentioned a vertical polyolefin continuous foaming equipment, the rolling device that increases thickness includes the coiling mechanism, and this coiling mechanism includes the rolling frame, sets up the tilting mechanism that can overturn in the rolling frame and sets up first rolling axle and the second rolling axle that can rotate on tilting mechanism.
The invention has the beneficial technical effects that:
(1) according to the vertical foaming device, the transition area, the pre-foaming area and the foaming area are sequentially arranged in the furnace, and the electric heating pipe and the hot air circulating fan are arranged in each area, wherein the total power of the electric heating pipes in the transition area, the pre-foaming area and the foaming area is ensured to be sequentially increased, so that the temperature distribution of a hot air field in the vertical foaming furnace is more uniform, the temperature difference of the same section of the same temperature area is controlled within the range of +/-3 ℃, the thickness of foamed polyolefin sheets is ensured to be consistent, the foam holes are fine and uniform, the width size is not deviated, and the production efficiency is greatly improved.
(2) According to the horizontal conveying device, the core-penetrating mesh belt is arranged on the transmission mechanism, and the steel mesh is attached to the outer surface of the transmission mechanism, so that the steel mesh only bears the weight of a product during working, the service life of the steel mesh is greatly prolonged by 6-8 times compared with that of the steel mesh in the existing equipment, the phenomenon of S-shaped edges of the product is completely avoided, and the production efficiency is improved;
(3) according to the unfolding device, the central shaft is fixedly arranged on the bottom plate, the central shaft is connected with the transmission frame through the two bearings, the transmission frame integrally swings around the central shaft, the central shaft is static, the integral swing amplitude of the expanding unit is small, the balance stability of the exhibit device is enhanced, and the expanding effect is good.
(4) According to the thickness adjusting device, the cylinder shaft stroke adjusting mechanism is arranged, and the cylinder shaft stroke adjusting mechanism at the tail part of the cylinder is rotated by hand to control the extending length of the cylinder shaft, so that the gap between the active thickness adjusting device roller and the passive thickness adjusting device roller can be conveniently and quickly adjusted; in addition, when the cylinder shaft stroke adjusting mechanism is a sleeve, an internal thread is arranged in the sleeve, external threads are arranged at the cylinder shaft tail end of the first passive thickness adjusting device cylinder and the cylinder shaft tail end of the second passive thickness adjusting device cylinder, and the cylinder shaft tail end of the first passive thickness adjusting device cylinder and the cylinder shaft tail end of the second passive thickness adjusting device cylinder are in threaded connection with the sleeve, so that the operation convenience is further improved, the adjusting time can be saved, and the adjusting precision is improved.
(5) According to the winding device, one end of the first winding shaft and one end of the second winding shaft are both fixed on the turnover mechanism, the other end of the first winding shaft and the other end of the second winding shaft are both suspended, and after winding is completed, only one worker needs to hold a coiled material and slightly pull out the coiled material from the suspended end of the first winding shaft or the suspended end of the second winding shaft, so that the coil is convenient to unload, time and labor are saved, and labor intensity is low.
Drawings
FIG. 1 is a schematic view of the structure of a vertical polyolefin continuous foaming apparatus according to the present invention.
FIG. 2 is a schematic view showing the structural connection between the horizontal transfer device and the horizontal preheating device according to the present invention.
Fig. 3 is a sectional view taken along line a-a of fig. 2.
Fig. 4 is a schematic structural view of the core-piercing belt of fig. 2.
Fig. 5 is a schematic structural view of a steel net.
Fig. 6 is a schematic structural view of the vertical foaming device of the present invention.
FIG. 7 is a schematic view of the installation of the spreading device and the vertical foaming device of the present invention.
Fig. 8 is a sectional view of the expanding unit of fig. 7.
Fig. 9 is a schematic structural diagram of the thickness adjusting device of the present invention.
Fig. 10 is a side view of a face calender.
Fig. 11 is a top view of the face calender.
Fig. 12 is a side view of a reverse calender.
Fig. 13 is a top view of the reverse calender.
Fig. 14 is a front view of the winding device of the present invention.
Fig. 15 is a side view of the winding device of the present invention.
In the figure:
1-horizontal conveyer
11-core-penetrating mesh belt 12-steel net 13-parallel guide rail 14-driving chain wheel 15-driven chain wheel 16-transmission mechanism 17-motor
2-horizontal preheating device
21-air inlet fan 22-horizontal preheating furnace 23-air inlet 24-air outlet 25-gas collecting hood 26-air outlet 27-horizontal feed inlet 28-horizontal discharge outlet 29-furnace body inner cavity 210-air inlet knife 211-fourth heating pipe 212-fifth heating pipe
3-vertical foaming device
31-vertical foaming furnace 32-vertical feeding hole 33-vertical discharging hole 34-furnace body inner cavity 35-transition zone 36-prefoaming zone 37-foaming zone 38-first electric heating tube 39-second electric heating tube 310-third electric heating tube 311-first hot air circulating fan 312-second hot air circulating fan 313-third hot air circulating fans 314, 315, 316-fan blade 317-side wall
4-deployment device
41-exhibition device 42-expanding unit 43-bottom plate 44-central shaft 45-first driving mechanism 46-second driving mechanism 47-first exhibition tube 48-second exhibition tube 49-transmission frame 410-bearing
5-thickness adjusting device
51-a front side calender 52-a back side calender 53-a first frame 54-a first transmission steering mechanism 55-a first heating mechanism 56-a front side calender 57-a first active calender unit 58-a first passive calender unit 59-an active calender roll 510-an active calender motor 511-a passive calender roll 512-a first passive calender cylinder 513-a second passive calender cylinder 514-a cylinder shaft stroke adjusting mechanism 515-a second frame 516-a second transmission steering mechanism 517-a second heating mechanism 518-a back side calender mechanism
6-winding device
61-rolling rack 62-power mechanism 63-speed reducing mechanism 64-turnover mechanism 65-first rolling shaft 66-second rolling shaft 67-first motor 68-second motor
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 1, the vertical continuous polyolefin foaming equipment provided by the invention comprises a horizontal conveying device 1, a horizontal preheating device 2, a vertical foaming device 3, an unfolding device 4, a thickness adjusting device 5 and a winding device 6 which are arranged in sequence. Wherein, the horizontal conveying device 1 is used for conveying the polyolefin sheets to the horizontal preheating device 2; the horizontal preheating device 2 is used for preheating the foamed polyolefin sheet in advance to reduce the moisture content of the polyolefin sheet; the vertical foaming device 3 is used for foaming the polyolefin sheet into a semi-finished product; the unfolding device 4 is used for unfolding the foamed and expanded polyolefin semi-finished product; the thickness-adjusting winding device is used for rolling the polyolefin sheets after being calendered.
As shown in fig. 2 to 5, the horizontal conveyor 1 includes a transmission mechanism 16, a core-through mesh belt 11 sleeved on the transmission mechanism 16, and a steel mesh 12 stacked and fixed on the outer surface of the core-through mesh belt 11 and used for supporting the product. The transmission mechanism 16 comprises a parallel guide rail 13 arranged in the horizontal preheating device 2 and playing a role in supporting and limiting, and a driving sprocket 14 and a driven sprocket 15 which are arranged at two ends of the parallel guide rail 13 and ensure that the stress of the core-penetrating mesh belt 11 in the width direction is uniform, wherein the driving sprocket 14 controls the rotation thereof through a motor 17.
When the horizontal conveying device works, the steel mesh 12 is driven by the core-penetrating mesh belt 11 to run on the two parallel guide rails 13, so that the external polyolefin sheet is conveyed into the horizontal preheating device 2 for preheating. In the conveying process, the steel mesh only bears the weight of the product and does not bear other external force, so that the service life of the steel mesh is prolonged. The service life of the steel mesh is 6-8 times longer than that of the steel mesh in the existing equipment, and meanwhile, the phenomenon of S-shaped edges of products is completely avoided, and the production efficiency is improved.
As shown in fig. 2, the horizontal preheating device 2 includes a horizontal preheating furnace 22, an air inlet fan 21 disposed at one end of the horizontal preheating furnace 22 for discharging exhaust gas from the furnace, and disposed at the other end of the horizontal preheating furnace 22 for satisfying the requirement of the temperature in the furnace from bottom to top. The horizontal feed inlet 27 and the horizontal discharge outlet 28 are respectively arranged on the furnace body of the horizontal preheating furnace 22. The air intake knife 210 of the air intake fan 21 enters the horizontal preheating furnace 22 through the horizontal feed inlet 27. The gas collecting hood 25 comprises a gas inlet 23, a gas outlet 24 and a gas outlet 26, wherein the gas inlet 23 is communicated with a horizontal discharge hole 28, the gas outlet 24 is communicated with the gas outlet 26, and the gas outlet 26 is communicated with the outside. The upper part of the inner cavity 29 of the horizontal preheating furnace 22 is provided with a plurality of fourth heating pipes 211 which are arranged at intervals, the lower part is provided with a plurality of fifth heating pipes 212 which are arranged at intervals, and the total power of the fifth heating pipes 212 is larger than that of the fourth heating pipes 211. The fourth heating pipe 211 is disposed above the transmission mechanism 16, the fifth heating pipe 212 is disposed in the transmission mechanism 16, and the air intake knife 210 of the blower 21 is aligned with the fourth heating pipe 211 and the fifth heating pipe 212. The air inlet knife 210 adopts a full-section flat-mouth type air inlet knife, so that the horizontal preheating temperature gradient distribution is more uniform, and the temperature fluctuation degree in the same gradient temperature can be controlled within the range of +/-1 ℃.
According to the horizontal preheating device, the fourth heating pipe 211 and the fifth heating pipe 212 are arranged, the total power of the fifth heating pipe 212 is larger than that of the fourth heating pipe 211, hot air flows upwards during heating, and the temperature distribution in the horizontal preheating furnace from bottom to top is more uniform. According to the horizontal type preheating device, the air inlet fan is arranged at the horizontal type feeding hole, fresh air at room temperature can be conveyed into the horizontal type preheating device, so that the temperature distribution in the whole horizontal type preheating device is more in line with the requirement that the temperature from the feeding hole to the discharging hole is increased when IXPE is used for horizontally preheating products, and the horizontal type preheating temperature is uniformly distributed in a gradient manner and is easy to control. The air inlet fan can adjust the air inlet volume through the frequency converter, and different air volumes can be selected according to different products, so that the influence of cold air on the preheating temperature is ensured to be minimum. The invention is provided with the gas-collecting hood, and the waste gas generated in the work process is collected by the gas-collecting hood and is discharged to the outside of a work field area, thereby creating a comfortable work environment for workers.
As shown in FIG. 6, the vertical foaming device 3 comprises a vertical foaming furnace 31, a transition region 35, a pre-foaming region 36 and a foaming region 37 are sequentially arranged in a furnace inner cavity 34 of the vertical foaming furnace 31 from top to bottom, a plurality of first electric heating tubes 38 are arranged in the transition region 35 at intervals along the width direction of the product droop, a plurality of second electric heating tubes 39 are arranged in the pre-foaming region 36 at intervals along the width direction of the product droop, a plurality of third electric heating tubes 310 are arranged in the foaming region 37 at intervals along the width direction of the product droop, the total power of the first electric heating tubes 38 is less than that of the second electric heating tubes 39, and the total power of the second electric heating tubes 39 is less than that of the third electric heating tubes 310. A plurality of first hot air circulating fans 311 which are arranged at intervals are arranged between the first electric heating pipe 38 and the side wall 317 of the vertical foaming furnace 31, a plurality of second hot air circulating fans 312 which are arranged at intervals are arranged between the second electric heating pipe 39 and the side wall 317 of the vertical foaming furnace 31, a plurality of third hot air circulating fans 313 which are arranged at intervals are arranged between the third electric heating pipe 310 and the side wall 317 of the vertical foaming furnace 31, fan blades 313 of the first hot air circulating fans 311, fan blades 314 of the second hot air circulating fans 312 and fan blades 315 of the third hot air circulating fans 313 are all arranged in the vertical foaming furnace, and the machine body of the first hot air circulating fans 311, the machine body of the second hot air circulating fans 312 and the machine body of the third hot air circulating fans 313 are all arranged outside the vertical foaming furnace. The first heated air circulation fan 311, the second heated air circulation fan 312 and the third heated air circulation fan 313 can be temperature-resistant type large-air-volume fans, so that the temperature distribution in the vertical foaming furnace is more uniform. The vertical foaming furnace 31 is provided with a vertical feed inlet 32 and a vertical discharge outlet 33 at the upper and lower ends thereof, respectively.
According to the vertical foaming device, the temperature is uniformly controlled in different areas, when the vertical foaming device works, the electric heating tubes in all the areas are uniformly irradiated and heated, and the hot air circulating fan blows hot air into the inner cavity of the furnace body, so that a hot air field with uniform temperature distribution is formed in the vertical foaming furnace; meanwhile, the total power of the electric heating tubes of the transition area, the pre-foaming area and the foaming area in the vertical foaming furnace is sequentially increased, namely the total power is higher or lower under the irradiation heating power in the vertical foaming furnace, hot air flows upwards, so that the temperature distribution of a hot air field in the vertical foaming furnace is more uniform, the temperature difference of the same section of the same temperature area is controlled within the range of +/-3 ℃, the thickness of outlet sheets is consistent, the foam holes are fine and uniform, the width size is free from deviation, and the production efficiency is greatly improved.
As shown in fig. 7, the spreading device 4 is disposed in the vertical foaming furnace 31 and below the foaming zone 37, and includes a exhibit device 41, the exhibit device 41 includes two expanding units 42, and the two expanding units 42 are symmetrically disposed on the sidewall of the vertical foaming furnace 31 at a certain inclination angle. As shown in fig. 8, the expanding unit 42 includes a base plate 43, a central shaft 44, a first driving mechanism 45, a second driving mechanism 46, a first display tube 47, a second display tube 48, and a driving frame 49. The bottom plate 43 is fixedly arranged on the furnace body of the vertical foaming furnace 31; one end of the central shaft 44 is fixedly arranged on the bottom plate 43, and the other end is connected with the transmission frame 49 through two bearings 410; the first exhibition pipe 47 and the second exhibition pipe 48 are in shaft connection with a transmission frame 49, the first exhibition pipe 47 and the second exhibition pipe 48 are arranged in parallel, the first exhibition pipe 47 can have a length larger than that of the second exhibition pipe 48, and anti-sticking layers are coated on the surfaces of the first exhibition pipe 47 and the second exhibition pipe 48; the first drive mechanism 45 is connected to a transmission frame 49, and the second drive mechanism 46 is connected to a first display tube 47 and a second display tube 48. It should be noted that the two bearings 410 may be both ordinary bearings, and the first driving mechanism 45 and the second driving mechanism 46 may be both motors.
According to the expanding unit of the exhibit device, the central shaft is fixedly arranged on the bottom plate and is connected with the transmission frame through the two bearings, the transmission frame integrally swings around the central shaft, and the central shaft is in a static state, so that the integral swinging amplitude of the expanding unit is small, the balance stability of the exhibit device is enhanced, and the expanding effect is good. When the central shaft is connected with the transmission frame through two common bearings, the transmission frame is not in contact with the furnace body of the vertical foaming furnace, the temperature of the transmission frame is low, and the common bearings can bear the temperature of the vertical foaming furnace, so that the cost is saved. When the surfaces of the first exhibition pipe and the second exhibition pipe are coated with anti-sticking layers, on one hand, volatile matters can be prevented from being stuck to the first exhibition pipe and the second exhibition pipe when the foaming agent is foamed, and on the other hand, frequent cleaning of the first exhibition pipe and the second exhibition pipe is avoided. The anti-sticking layer is a nano coating, and when the thickness is about 35 mu m, the anti-sticking layer can be ensured to be firm and not fall off, and the reliability is high.
As shown in fig. 9, the thickness adjusting device 5 includes a obverse calender 51 and a reverse calender 52, and the obverse calender 51 includes a first frame 53, and a first conveyance/steering mechanism 54, a first heating mechanism 55 and a obverse calender mechanism 56 which are mounted on the first frame 53 in this order from top to bottom. The front calendering mechanism 56 comprises a first active calendering unit 57 and a first passive calendering unit 58. As shown in fig. 10, 11, the first active calendering unit 57 comprises an active calendering roll 59 and an active calendering motor 510 for driving the active calendering roll 59 in rotation; the first passive calendering unit 58 comprises a passive calendering roller 511, a first passive calendering cylinder 512 and a second passive calendering cylinder 513, the first passive calendering cylinder 512 is connected with one end of the passive calendering roller 511, the second passive calendering cylinder 513 is connected with the other end of the passive calendering roller 511, the cylinder shaft starting end of the first passive calendering cylinder 512 and the cylinder shaft starting end of the second passive calendering cylinder 513 extend between the active calendering roller 59 and the passive calendering roller 511, and the cylinder shaft tail end of the first passive calendering cylinder 512 and the cylinder shaft tail end of the second passive calendering cylinder 513 are both provided with a cylinder shaft stroke adjusting mechanism 514 for controlling the extension length of the cylinder shafts. The reverse calender 52 comprises a second machine frame 515, and a second transmission steering mechanism 516, a second heating mechanism 517 and a reverse calender mechanism 518 which are sequentially arranged on the second machine frame 515 from bottom to top; the structure of the reverse calendering mechanism 518 is the same as that of the front calendering mechanism 56, and functions the same, and will not be described herein again, as shown in fig. 12 and 13. The cylinder shaft stroke adjusting mechanism 514 of the invention adopts a sleeve, the sleeve is sleeved at the cylinder shaft tail end of the first passive calendering cylinder 512 and the cylinder shaft tail end of the second passive calendering cylinder 513, internal threads are arranged in the sleeve, the cylinder shaft tail end of the first passive calendering cylinder 512 and the cylinder shaft tail end of the second passive calendering cylinder 513 are both provided with external threads, and the cylinder shaft tail end of the first passive calendering cylinder 512 and the cylinder shaft tail end of the second passive calendering cylinder 513 are both in threaded connection with the sleeve.
According to the thickness adjusting device, the cylinder shaft stroke adjusting mechanisms are arranged at the tail end of the cylinder shaft of the first passive calendering cylinder and the tail end of the cylinder shaft of the second passive calendering cylinder, the cylinder shaft stroke adjusting mechanisms are fixedly connected with the cylinder shafts of the passive calendering cylinders, the extending length of the cylinder shafts is controlled by rotating the cylinder shaft stroke adjusting mechanisms at the tail parts of the passive calendering cylinders through an operator, so that a gap between the active calendering roller and the passive calendering roller can be conveniently and quickly adjusted, after the adjustment is completed, the active calendering roller and the passive calendering roller are opened and closed for multiple times, the gap is not changed, the active calendering roller and the passive calendering roller are ensured to be parallel, and the effect of the thickness adjusting device is good. When cylinder axle stroke guiding mechanism was the sleeve, was provided with the internal thread in the sleeve, and the cylinder axle tail end of first passive press polish cylinder and the cylinder axle tail end of the passive press polish cylinder of second all are provided with the external screw thread, and the cylinder axle tail end of first passive press polish cylinder and the cylinder axle tail end of the passive press polish cylinder of second all with sleeve threaded connection, from this, further increased its simple operation nature, can save adjustment time, improve the adjustment precision.
As shown in fig. 14 and 15, the winding device 6 includes a winding frame 61, a power mechanism 62, a speed reducing mechanism 63, a turnover mechanism 64, a first winding shaft 65, and a second winding shaft 66. The power mechanism 62 and the speed reducing mechanism 63 are both arranged on the winding frame 61. The power mechanism 62 includes a first motor 67 and a second motor 68, the first motor 67 is connected to the first winding shaft 65, and the second motor 68 is connected to the second winding shaft 66. First rolling axle 65 and second rolling axle 66 all include pivot and physiosis axle, and the physiosis axle box is established in the pivot, pivot and tilting mechanism 64 fixed connection, and reduction gears 63 is connected with tilting mechanism 64, and the one end of first rolling axle 65 and the one end of second rolling axle 66 are all fixed on tilting mechanism 64, and the other end of first rolling axle 65 and the other end of second rolling axle 66 are all unsettled, first rolling axle 65 and second rolling axle 66 parallel arrangement. The speed reduction mechanism 63 is a speed reduction motor.
According to the winding device, the first winding shaft and the second winding shaft respectively comprise the rotating shaft and the air expansion shaft, the air expansion shaft is sleeved on the rotating shaft, when the rotating shaft is fixedly connected with the turnover mechanism, only one worker needs to discharge compressed air in the air expansion shaft when a coil is unwound, the coiled material is held and is pulled out from the suspended end of the first winding shaft or the suspended end of the second winding shaft, the coil is conveniently unwound, and time and labor are saved.
The working principle of the polyolefin foaming equipment is as follows:
in the horizontal conveying and horizontal preheating stages, before the polyolefin sheets enter the horizontal conveying device 1 and the horizontal preheating device 2, aiming at different products, firstly, the proper air inlet volume of the air inlet fan 21 is adjusted and selected through a frequency converter, the influence of cold air on the preheating temperature is ensured to be minimum, the air inlet fan 21 is started, fresh air at room temperature is conveyed into the inner cavity 29 of the furnace body through the air inlet knife 210 at the horizontal feed inlet 27, the temperature distribution in the whole horizontal preheating device is enabled to be more consistent with the requirement that the temperature is increased from the horizontal feed inlet 27 to the horizontal discharge outlet 28 when IXPE performs horizontal preheating on the products, the polyolefin sheets to be foamed are placed on the steel mesh 12, and the transmission mechanism 16 drives the core-penetrating mesh belt 11 to run so as to convey the polyolefin sheets into the horizontal preheating device. The product is irradiated and heated by the fourth electric heating tube 211 and the fifth electric heating tube 212 while being conveyed by the horizontal conveying device 1, and the heated product freely falls from the horizontal discharge port and enters the vertical foaming furnace. In the vertical foaming stage, the polyolefin material reaches the foaming temperature through the irradiation heating in the transition region 35 and the pre-foaming region 36, enters the foaming region 37 to complete foaming, and leaves the vertical foaming device 3 through the vertical discharge port 33 to enter the unfolding device. In the unfolding stage, the first driving mechanism 45 drives the transmission frame 49, the transmission frame 49 rotates by 90 degrees, so that the polyolefin foamed sheet passes through the space between the first exhibition pipe 47 and the second exhibition pipe 48, the second driving mechanism 46 drives the first exhibition pipe 47 and the second exhibition pipe 48 to rotate, the semi-finished product of the polyolefin foamed sheet is expanded, and the expanded product enters the thickness adjusting device. In the thickness adjusting stage, the polyolefin foamed sheet output by the vertical foaming device 3 is conveyed downwards after being turned 90 degrees by the first conveying and turning mechanism 54, is heated by the first heating mechanism 55, and is then conveyed continuously to the gap between the driving calender roll 59 and the driven calender roll 511, the driven calender roll 511 is driven by the cylinder tail end of the first driven calender cylinder 512 and the cylinder tail end of the second driven calender cylinder 513 to move horizontally towards the driving calender roll 59 to press the polyolefin foamed sheet, the driving calender motor 510 drives the driving calender roll 59 to rotate, so that one side of the polyolefin foamed sheet close to the driven calender roll 511 is calendered, the polyolefin foamed sheet passes through the gap between the driving calender roll 59 and the driven calender roll 511 and is conveyed to the reverse calender roll 52 along the horizontal direction, and is conveyed upwards along the vertical direction after being turned 90 degrees by the second conveying and turning mechanism 516, and then the polyolefin foamed sheet is heated by a second heating mechanism 517 and then conveyed to a reverse calendering mechanism 518 to calender one side of the polyolefin foamed sheet close to the driving calendering roller 59, so that the two sides of the polyolefin foamed sheet are calendered, and the calendered polyolefin foamed sheet enters a winding device. And in the winding stage, only one worker needs to discharge the compressed air in the air inflation shaft and hold the coiled material to slightly pull out the coiled material from the suspended end of the first winding shaft or the suspended end of the second winding shaft.
The vertical polyolefin continuous foaming device of the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can derive other embodiments according to the technical solution of the present invention, and the same shall fall into the technical innovation scope of the present invention.

Claims (10)

1. The utility model provides a vertical polyolefin continuous foaming equipment, includes horizontal conveyer (1), horizontal preheating device (2), vertical foaming device (3), expansion device (4) and transfers thick coiling mechanism, characterized by: the horizontal conveying device (1) is used for conveying the polyolefin sheets to the horizontal preheating device (2), the horizontal preheating device (2) is used for preheating the polyolefin sheets, the vertical foaming device (3) is used for foaming the preheated polyolefin sheets, and the thickness-adjusting winding device is used for calendering and winding the foamed polyolefin semi-finished products; the vertical foaming device (3) comprises a vertical foaming furnace (31), a transition area (35), a pre-foaming area (36) and a foaming area (37) are sequentially arranged in the vertical foaming furnace (31) from top to bottom, electric heating tubes are respectively arranged on two corresponding sides of each area, a hot air circulating fan is arranged between each electric heating tube and the inner wall of the vertical foaming furnace (31), the total power of the electric heating tubes in the transition area is smaller than that of the electric heating tubes in the pre-foaming area, and the total power of the electric heating tubes in the pre-foaming area is smaller than that of the electric heating tubes in the.
2. The vertical polyolefin continuous foaming apparatus of claim 1, wherein: the upper end of the vertical foaming furnace (31) is provided with a vertical feed inlet (32), and the lower end is provided with a vertical discharge outlet (33).
3. A vertical polyolefin continuous foaming apparatus as claimed in claim 1 or 2, wherein: the horizontal preheating device (2) comprises a horizontal preheating furnace (22), wherein an upper row of electric heating tubes and a lower row of electric heating tubes are arranged in the horizontal preheating furnace (22) and used for heating the front surface and the back surface of the polyolefin sheet, and the total power of the upper row of electric heating tubes is smaller than that of the lower row of electric heating tubes.
4. A vertical polyolefin continuous foaming apparatus as claimed in claim 3, wherein: one end of the horizontal preheating furnace (22) is provided with an air inlet fan (21) for meeting the requirement of the temperature in the furnace (29) from bottom to high, and the other end is provided with a gas collecting hood (25) for discharging waste gas in the furnace (29).
5. The vertical polyolefin continuous foaming apparatus of claim 4, wherein: the horizontal conveying device (1) comprises a transmission mechanism (16) for conveying polyolefin sheets, a core-penetrating mesh belt (11) sleeved on the transmission mechanism (16) and a steel mesh (12) fixed on the core-penetrating mesh belt (11) and used for bearing the polyolefin sheets.
6. The vertical polyolefin continuous foaming apparatus of claim 5, wherein: the transmission mechanism (16) comprises a parallel guide rail (13) arranged in the horizontal preheating furnace (22), and a driving chain wheel (14) and a driven chain wheel (15) which are arranged at two ends of the parallel guide rail (13) and outside the horizontal preheating furnace (22).
7. The vertical polyolefin continuous foaming apparatus of claim 6, wherein: the unfolding device (4) is arranged below the foaming area (37) and comprises two expansion units (42) symmetrically arranged on the side wall (317) of the vertical foaming furnace (31) in a penetrating manner, each expansion unit (42) comprises a bottom plate (43) fixed on the outer wall of the vertical foaming furnace, a central shaft (44) which is arranged on the bottom plate (43) and can rotate, a transmission frame (49) connected with the central shaft (44) and a first unfolding pipe (47) and a second unfolding pipe (48), wherein one end of the first unfolding pipe is connected with the transmission frame (49) in a shaft mode, and the other end of the first unfolding pipe penetrates through the bottom plate (43) and enters the vertical foaming furnace (31).
8. The vertical polyolefin continuous foaming apparatus of claim 7, wherein: the first exhibition pipe (47) is shorter than the second exhibition pipe (48), and the first exhibition pipe (47) and the second exhibition pipe (48) are respectively connected with the second driving mechanism (46).
9. The vertical polyolefin continuous foaming apparatus of claim 8, wherein: the thickness-adjusting winding device comprises a thickness-adjusting device (5), the thickness-adjusting device (5) comprises a front calender (51) and a back calender (52), the front calender (51) comprises a first frame (53), and a first transmission steering mechanism (54), a first heating mechanism (55) and a front calender mechanism (56) which are sequentially arranged on the first frame (53) from top to bottom; the reverse calender (52) comprises a second machine frame (515), and a reverse calendering mechanism (518), a heating mechanism (517) and a second transmission steering mechanism (516) which are sequentially arranged on the second machine frame (515) from top to bottom.
10. The vertical polyolefin continuous foaming apparatus of claim 9, wherein: the thickness-adjusting winding device comprises a winding device (6), wherein the winding device (6) comprises a winding rack (61), a turnover mechanism (64) which is arranged on the winding rack (61) and can be turned over, and a first winding shaft (65) and a second winding shaft (66) which are arranged on the turnover mechanism (64) and can rotate.
CN201911147091.0A 2019-11-21 2019-11-21 Vertical continuous foaming equipment for polyolefin Withdrawn CN110871542A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911147091.0A CN110871542A (en) 2019-11-21 2019-11-21 Vertical continuous foaming equipment for polyolefin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911147091.0A CN110871542A (en) 2019-11-21 2019-11-21 Vertical continuous foaming equipment for polyolefin

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CN110871542A true CN110871542A (en) 2020-03-10

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Country Link
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102672872A (en) * 2012-05-25 2012-09-19 宁波高新区辉门科技有限公司 Electronic irradiating crosslinked polyethylene foaming machine
KR20130050765A (en) * 2011-11-08 2013-05-16 영보화학 주식회사 Vertical foaming apparatus for manufacturing thin sheet
CN105751422A (en) * 2016-05-09 2016-07-13 湖北祥源新材科技股份有限公司 Foaming furnace
CN109333902A (en) * 2018-11-21 2019-02-15 浙江润阳新材料科技股份有限公司 A kind of vertical-foaming equipment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130050765A (en) * 2011-11-08 2013-05-16 영보화학 주식회사 Vertical foaming apparatus for manufacturing thin sheet
CN102672872A (en) * 2012-05-25 2012-09-19 宁波高新区辉门科技有限公司 Electronic irradiating crosslinked polyethylene foaming machine
CN105751422A (en) * 2016-05-09 2016-07-13 湖北祥源新材科技股份有限公司 Foaming furnace
CN109333902A (en) * 2018-11-21 2019-02-15 浙江润阳新材料科技股份有限公司 A kind of vertical-foaming equipment

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