CN113183388B - Vertical foaming equipment and foaming process - Google Patents
Vertical foaming equipment and foaming process Download PDFInfo
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- CN113183388B CN113183388B CN202110635540.7A CN202110635540A CN113183388B CN 113183388 B CN113183388 B CN 113183388B CN 202110635540 A CN202110635540 A CN 202110635540A CN 113183388 B CN113183388 B CN 113183388B
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- 238000005187 foaming Methods 0.000 title claims abstract description 202
- 238000000034 method Methods 0.000 title claims description 29
- 230000008569 process Effects 0.000 title claims description 27
- 238000002955 isolation Methods 0.000 claims abstract description 48
- 238000005096 rolling process Methods 0.000 claims abstract description 16
- 238000005192 partition Methods 0.000 claims description 16
- 239000002344 surface layer Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 9
- 239000010410 layer Substances 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000005341 toughened glass Substances 0.000 claims description 4
- 238000003892 spreading Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 33
- 229920000098 polyolefin Polymers 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 238000004134 energy conservation Methods 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 238000007731 hot pressing Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 229940079938 nitrocellulose Drugs 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Images
Classifications
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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
- B29C44/20—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
- B29C44/26—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 using several expanding steps
-
- 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
- B29C44/35—Component parts; Details or accessories
Landscapes
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The utility model provides a vertical foaming equipment, includes vertical foaming furnace, the level setting in the horizontal preheating furnace of vertical foaming furnace top and be used for carrying the pending foaming sheet and carry out the conveyer of rolling to the sheet that has accomplished the foaming, its characterized in that: the device is characterized in that an isolation device is arranged at a furnace opening at the bottom of the vertical foaming furnace, and the isolation device comprises guide rails arranged on two side edges of the furnace opening, an isolation plate capable of moving along the guide rails, and a driving device for driving the isolation plate to move along the guide rails. The invention improves the quality of the produced foaming material and saves a large amount of electric energy by arranging the isolation plate at the furnace mouth.
Description
Technical Field
The invention relates to the technical field of foaming furnaces, in particular to vertical foaming equipment and a foaming process.
Background
The current crosslinked polyolefin foaming process mainly comprises the following steps: 1. kneading and granulating the polyolefin raw material and various additives, 2, adding the mixture into an extruder for plasticizing to obtain a polyolefin master slice with uniformly mixed components, and 3, foaming the polyolefin master slice by a foaming furnace. The prior general foaming furnaces mainly comprise two types, one type is that a horizontal furnace is used as a preheating section and a foaming section, and the other type is that a foaming master slice firstly passes through a section of horizontal furnace and then is foamed in a vertical furnace. In the second mode, the horizontal furnace mainly provides preheating of the polyolefin master slice, and after the polyolefin master slice is heated through different temperature intervals, the polyolefin master slice reaching the vertical furnace has certain temperature, so that 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. After the polyolefin master slice enters a vertical furnace, the foaming agent is decomposed under the action of high temperature, and the bubbles are dispersed in the master slice to form foam holes.
For example, chinese patent with patent application No. CN201811390948.7 discloses a vertical foaming device, which includes a furnace body, a heating field disposed in the furnace body, and a roller set for feeding a sheet to be foamed into the furnace body for foaming and rolling up the foamed sheet; the furnace body sequentially comprises a horizontal preheating furnace and a vertical foaming furnace, the height of the vertical foaming furnace is 6-10m, the vertical foaming furnace comprises a first foaming section connected with the discharge end of the horizontal preheating furnace, and the heating field comprises a high-temperature heating field arranged at the first foaming section. The product produced by the production equipment is not stable enough in property, for example, the thickness of the foamed material is not consistent, and the surface of the product is easy to separate from the foamed middle layer after the product is manufactured.
Technical scheme
In order to solve the technical problems in the technical scheme, the invention provides vertical foaming equipment and a foaming process.
The specific scheme of the invention is as follows:
the utility model provides a vertical foaming equipment, includes vertical foaming furnace, level setting in the horizontal preheater at vertical foaming furnace top and be used for carrying the pending foaming sheet and carry out the conveyer of rolling to the sheet that has accomplished the foaming, the bottom of vertical foaming furnace is provided with fire door, its characterized in that: the furnace mouth is provided with an isolating device, the isolating device comprises guide rails arranged on two side edges of the furnace mouth, two isolating plates which are arranged on the same plane based on the guide rails, and a driving device used for driving the isolating plates to move along the guide rails, and a channel area is arranged between the two isolating plates.
The inventor compares products in different seasons, finds that the quality of the foaming material produced in the seasons with much wind is poor, and presumes that the influence of the airflow on the foaming process causes uneven thickness of the foaming material; however, when the foaming furnace is in operation, due to the deviation of the conveying device, the foaming conditions and the like, workers need to observe the foaming condition in the foaming furnace through the furnace opening from time to time and adjust the tension roller in the furnace to correct the abnormity of the foaming section, so the furnace door is normally in an open state, and in this case, the free entry of air flow, dust and the like into the foaming furnace cannot be avoided; in consideration of the problem of cost, the inventor firstly installs a door plate which is manually pulled and pushed at the bottom of the vertical foaming furnace, so that the open area of a furnace mouth of the vertical foaming furnace is reduced, the possibility of air flow entering the foaming furnace is reduced, and the quality of the foaming material is improved. In the technical scheme, most of air flow is blocked by the isolating plate arranged at the bottom furnace mouth of the bottom of the vertical foaming furnace, so that the aim of improving the quality of the foaming material is fulfilled; secondly, the motor is used for controlling the isolation plate, so that the opening and closing of the door become simple, and workers can operate the isolation plate more easily to observe; unexpectedly, the installation of the electrically controlled isolation plate not only does not increase the energy consumption, but also reduces the energy consumption of each production line, and the average electricity cost saved by each production line is about thirty-odd, which may be that the isolation plate is closed for a long time, so that the ventilation of the inside and the outside of the furnace through the furnace mouth is greatly reduced, thereby reducing the heat loss in the furnace and the energy consumption for maintaining the furnace temperature.
Preferably, the isolation plate comprises an upper surface layer, a lower surface layer and a middle heat insulation layer, and by arranging the three layers of isolation plates, the upper surface layer and the lower surface layer are steel-structured products, so that the isolation plate can be ensured to have certain bearing capacity and cannot easily break down; the middle heat insulation layer is filled with heat insulation materials such as pyroxylin and the like, so that the heat loss is reduced.
Preferably, a rectangular observation window is arranged on the isolation plate, and a transparent toughened glass plate is embedded into the rectangular observation window, so that a worker can conveniently observe the foaming condition in the furnace in the operation process of the equipment, the foamed sheet can be properly adjusted according to the observed condition, and the finished product quality of the foamed material is improved.
Preferably, the driving device comprises a movable pulley arranged on the isolation plate, a fixed pulley arranged on the guide rail, a secondary wheel coaxial with the fixed pulley, a motor for driving the secondary wheel and a transmission part connected with the motor and the secondary wheel, the movable pulley is abutted against the guide rail, the fixed pulley is abutted against the isolation plate, the isolation device is simple in structure and easy to operate, and the opening and closing of the door plate can be controlled by controlling the forward and reverse rotation of the motor.
Preferably, the isolation plate is provided with a sliding groove matched with the fixed pulley, so that the operation state of opening and closing the isolation plate is more stable.
Preferably, a retaining ring for manually controlling the movement of the isolation plate is arranged on one edge of the middle part of the furnace mouth at the bottom of the vertical foaming furnace on the lower surface of the isolation plate, so that a worker can open the isolation plate to rush repair under an emergency condition.
Preferably, one end of the guide rail, which is close to the channel area, is provided with a limiting protrusion integrally connected with the guide rail, the protrusion is arranged to limit the closing degree of the partition board to prevent the partition board from contacting with a foamed material so as to prevent the foamed material which is not cooled from being damaged, and the four protrusion structures limit the two partition boards to reserve a passing distance of 8 to 20cm for the foamed material so as to ensure that the foamed material is not damaged.
A foaming process comprising, in order: preheating, foaming, unfolding, cooling and rolling, wherein the isolation device of the furnace mouth is in a closed state in the whole process, and the distance between the two isolation plates is controlled to be 8-20cm. Namely, the opening of the foaming furnace is at least ensured to have a clearance of 8-20cm so as to allow the foamed sheet to pass through.
In the technical scheme, the foaming furnace with the partition plate is adopted, so that the fluctuation of air flow in the furnace tends to be smooth, and the temperature in the furnace is effectively controlled. Therefore, the foaming pad produced according to the method becomes more uniform in thickness, cell uniformity, cell size and the like, and downstream products produced according to the foaming material can better meet the expectation and the preference of consumers and have better marketability; meanwhile, the production is carried out according to the method, and more electric energy is saved compared with the production before improvement.
Preferably, the partition board is opened to observe the deflection of the foaming sheet in the oven every 1 to 1.5 hours in the foaming process, and the rotating speed of an unfolding roller in the conveying device is adjusted when the deflection is observed so as to prevent the foaming sheet from deflecting. In the production process, in the technical scheme, the deflection of the foaming sheet refers to the situation that the foaming sheet is distorted in a vertical foaming furnace, the deflection, the distortion and the like of the foaming sheet can be caused by the difference of friction force, gravity and the like in the conveying process of the foaming sheet, and in this situation, the to-be-foamed sheet is deformed and wrinkles appear during foaming.
In conclusion, the beneficial effects of the invention are as follows:
1. according to the invention, the area of an open area is reduced through the isolation plate arranged at the furnace mouth of the vertical foaming furnace, so that the influence of the external airflow change on the foaming process in the foaming furnace is realized, the quality of the foaming material is improved, and the foaming material is more uniform particularly in thickness;
2. the partition plate is arranged at the furnace mouth of the vertical foaming furnace, so that the heat dissipation from the furnace mouth at the bottom is reduced, the working time of a heating device in the vertical foaming furnace is shortened, and a large amount of electric energy is saved;
3. the observation window provided with the toughened glass is arranged on the partition plate, so that the observation of workers is facilitated, and the problems in the foaming process can be timely adjusted by the workers;
4. the foaming plate capable of manually controlling the opening and closing of the isolation plate is arranged at the bottom of the isolation plate, so that the possibility that the isolation plate cannot be opened under the condition of unexpected power failure is avoided, and the fault detection is facilitated;
5. the invention is provided with the limiting bulge integrally connected with the guide rail at one end of the middle part of the furnace mouth at the bottom of the vertical foaming furnace, so that the damage to the foaming material caused by the rubbing and the collision of the isolation plate and the foaming material due to inertia and other reasons when the isolation plate is closed can be avoided.
Drawings
FIG. 1 is a cross-sectional view of a foaming oven;
FIG. 2 is an enlarged view of a portion a of FIG. 1;
FIG. 3 is a bottom view of the spacer portion;
FIG. 4 is a schematic view of selected measurement points on the mat;
in the figure, 1-vertical foaming furnace, 2-horizontal preheating furnace, 3-conveyor, 4-pass zone, 11-port, 12-spacer, 31-spreading roller, 111-side, 121-guide, 122-spacer, 123-driver, 1211-limit protrusion, 1221-upper surface layer, 1222-lower surface layer, 1223-middle insulation layer, 1224-rectangular observation window, 1225-chute, 1226-buckle, 1231-movable pulley, 1232-fixed pulley, 1233-secondary pulley, 1234-motor, 1235-chain.
Detailed Description
The following detailed description of embodiments of the invention is provided in connection with the accompanying drawings. The following examples or figures are illustrative of the present invention, but do not limit the scope of the present invention.
Example 1
As shown in fig. 1, a vertical foaming apparatus includes a vertical foaming furnace 1, a horizontal preheating furnace 2 horizontally arranged on top of the vertical foaming furnace, and a conveying device 3 for conveying a sheet to be foamed and winding the foamed sheet, wherein a furnace opening 11 is arranged at the bottom of the vertical foaming furnace 1, and is characterized in that: the furnace mouth 11 is provided with an isolating device 12, the isolating device 12 comprises guide rails 121 arranged on two side edges 111 of the furnace mouth 11, two isolating plates 122 arranged on the basis of the guide rails 121 and located on the same plane, and a driving device 123 for driving the isolating plates 122 to move along the guide rails 121, and a channel area 4 is arranged between the two isolating plates 122.
The partition 122 includes an upper surface layer 1221, a lower surface layer 1222, and a middle heat insulation layer 1223.
The driving device 123 includes a movable pulley 1231 disposed on the isolation plate 122, a fixed pulley 1232 disposed on the guide rail, a secondary pulley 1233 coaxial with the fixed pulley, a motor 1234 driving the secondary pulley 1233, and a transmission 1235 connecting the motor 1234 and the secondary pulley 1233, wherein the movable pulley 1231 abuts against the guide rail 121, and the fixed pulley 1232 abuts against the isolation plate 122.
The isolation plate 122 is provided with a sliding groove 1225 engaged with the fixed pulley 1232.
A retaining ring 1226 for manually controlling the movement of the isolation plate 122 is disposed on the lower surface of the isolation plate 122.
One end of the guide rail 121 close to the channel region 4 is provided with a limit protrusion 1211 integrally connected with the guide rail 121.
A foaming process using the vertical foaming equipment sequentially comprises the following steps: preheating A: the sheet to be foamed is sent to a horizontal preheating furnace 2 at 70-110 ℃ for preheating through a conveying device 3. Because the sheet is gradually heated through a section of furnace body, the temperature of each part in the furnace is different, and the temperature in the preheating furnace is in a section of temperature range; b, foaming: sending the preheated sheet to a vertical foaming furnace 1 through a conveying device 3 for foaming, wherein the conveying speed is 21m/min, and the foaming step comprises the following steps: a. foaming for the first time, namely foaming the sheet at 270 to 285 ℃ for 6s; b. and (3) performing two-stage foaming, namely foaming the sheet at 230 to 270 ℃ for 6s. Wherein, the vertical foaming furnace 1 is a vertically arranged foaming furnace with the height of 8.1 m. The total height of the first stage foaming section and the second stage foaming section was 4.2m. The heat source is arranged in the second section of foaming section, and the first section of foaming is performed on the sheet by the heat dissipated by the second section, so that two-section foaming is provided for the sheet, and under the condition that a heating element is not required to be additionally arranged, the foaming efficiency and the foaming quality are improved, and the advantages of energy conservation and consumption reduction are achieved; c, unfolding: flattening the expanded sheet after foaming, and flattening the foaming material while the foaming material is hot through an unfolding roller arranged in a vertical foaming furnace 1; d, cooling: cooling the unfolded sheet to 40 ℃; e, rolling: rolling the cooled sheet material through a conveying device 3 to obtain a foamed product; in the whole process, the isolation device 12 of the foaming furnace mouth 11 is in a closed state, and the distance between the two isolation plates 122 is controlled to be 8-20cm.
In the foaming process, the partition plate 122 is opened every 1 to 1.5 hours to observe the deflection condition of the foaming sheet in the furnace, and the rotating speed, the distance and the like of a part of the roller sets in the conveying device 3 are adjusted when the deflection is observed.
Example 2
A vertical foaming device comprises a vertical foaming furnace 1, a horizontal preheating furnace 2 horizontally arranged at the top of the vertical foaming furnace, and a conveying device 3 used for conveying sheets to be foamed and rolling the sheets after foaming is completed, wherein a furnace opening 11 is formed in the bottom of the vertical foaming furnace 1, and the vertical foaming device is characterized in that: the furnace mouth 11 is provided with an isolating device 12, the isolating device 12 comprises guide rails 121 arranged on two side edges 111 of the furnace mouth 11, two isolating plates 122 arranged on the basis of the guide rails 121 and located on the same plane, and a driving device 123 for driving the isolating plates 122 to move along the guide rails 121, and a channel area 4 is arranged between the two isolating plates 122.
The partition 122 includes an upper surface layer 1221, a lower surface layer 1222, and a middle heat insulation layer 1223.
The isolation plate 122 is provided with a rectangular observation window 1224, and a transparent tempered glass plate is embedded in the rectangular observation window 1224.
The driving device 123 includes a movable pulley 1231 disposed on the isolation plate 122, a fixed pulley 1232 disposed on the guide rail, a secondary pulley 1233 coaxial with the fixed pulley, a motor 1234 driving the secondary pulley 1233, and a transmission 1235 connecting the motor 1234 and the secondary pulley 1233, wherein the movable pulley 1231 abuts against the guide rail 121, and the fixed pulley 1232 abuts against the isolation plate 122.
The isolation plate 122 is provided with a sliding groove 1225 matched with the fixed pulley 1232.
A retaining ring 1226 for manually controlling the movement of the isolating plate 122 is disposed on the lower surface of the isolating plate 122.
One end of the guide rail 121 close to the channel region 4 is provided with a limit protrusion 1211 integrally connected with the guide rail 121.
A foaming process using the vertical foaming equipment sequentially comprises the following steps: preheating A: the sheet to be foamed is sent to a horizontal preheating furnace 2 at 70-110 ℃ for preheating through a conveying device 3. Because the sheet is gradually heated through a section of furnace body, the temperature of each part in the furnace is different, and the temperature in the preheating furnace is a section of temperature range; b, foaming: sending the preheated sheet to a vertical foaming furnace 1 through a conveying device 3 for foaming, wherein the conveying speed is 21m/min, and the foaming step comprises the following steps: a. foaming for the first time, namely foaming the sheet at 270 to 285 ℃ for 6s; b. and (3) performing two-stage foaming, namely foaming the sheet at 230 to 270 ℃ for 6s. Wherein, the vertical foaming furnace 1 is a vertically arranged foaming furnace with the height of 8.1 m. The total height of the first stage foaming section and the second stage foaming section was 4.2m. The heat source is arranged in the second section of foaming section, and the first section of foaming is performed on the sheet by the heat dissipated by the second section, so that two-section foaming is provided for the sheet, and under the condition that a heating element is not required to be additionally arranged, the foaming efficiency and the foaming quality are improved, and the advantages of energy conservation and consumption reduction are achieved; c, unfolding: flattening the expanded sheet after foaming, and flattening the foaming material while the foaming material is hot through an unfolding roller arranged in a vertical foaming furnace 1; d, cooling: cooling the unfolded sheet to 40 ℃; e, rolling: rolling the cooled sheet material through a conveying device 3 to obtain a foamed product; in the whole process, the isolation device 12 of the foaming furnace mouth 11 is in a closed state, and the distance between the two isolation plates 122 is controlled to be 8-20cm.
In the foaming process, the partition plate 122 is opened every 1 to 1.5 hours to observe the deflection condition of the foaming sheet in the furnace, and the rotating speed, the distance and the like of a part of the roller sets in the conveying device 3 are adjusted when the deflection is observed.
Comparative example 1
A vertical foaming device comprises a vertical foaming furnace, a horizontal preheating furnace horizontally arranged at the top of the vertical foaming furnace and a conveying device used for conveying a sheet to be foamed and rolling the foamed sheet.
A foaming process using the vertical foaming equipment sequentially comprises the following steps: sequentially comprises the following steps: preheating A, foaming B, unfolding C, cooling D and rolling E.
Comparative example 2
The utility model provides a vertical foaming equipment, includes vertical foaming furnace, level setting in the horizontal preheater at vertical foaming furnace top and be used for carrying the pending foaming sheet and carry out the conveyer of rolling to the sheet that has accomplished the foaming, the bottom of vertical foaming furnace is provided with fire door, its characterized in that: the furnace mouth is provided with an isolating device, the isolating device comprises guide rails arranged on two side edges of the furnace mouth, two isolating plates which are arranged on the same plane based on the guide rails, and a driving device used for driving the isolating plates to move along the guide rails, and a channel area is arranged between the two isolating plates.
A foaming process using the vertical foaming equipment sequentially comprises the following steps: preheating A: the sheet to be foamed is sent to a horizontal preheating furnace at 70-110 ℃ for preheating through a conveying device. Because the sheet is gradually heated through a section of furnace body, the temperature of each part in the furnace is different, and the temperature in the preheating furnace is a section of temperature range; b, foaming: sending the preheated sheet to a vertical foaming furnace through a conveying device for foaming, wherein the conveying speed is 21m/min, and the foaming step comprises the following steps: a. foaming at the first stage, namely foaming the sheet at 270-285 ℃ for 6s; b. and (3) performing two-stage foaming, namely foaming the sheet at 230 to 270 ℃ for 6s. Wherein, the vertical foaming furnace is a vertically arranged foaming furnace with the height of 8.1 m. The total height of the first stage foam stage and the second stage foam stage was 4.2m. The heat source is arranged in the second section of foaming section, and the first section of foaming is performed on the sheet by the heat dissipated by the second section, so that two-section foaming is provided for the sheet, and under the condition that a heating element is not required to be additionally arranged, the foaming efficiency and the foaming quality are improved, and the advantages of energy conservation and consumption reduction are achieved; c, unfolding: flattening the expanded sheet after foaming, and flattening the foaming material while the foaming material is hot through an unfolding roller arranged in a vertical foaming furnace; d, cooling: cooling the unfolded sheet to 40 ℃; e, rolling: rolling the cooled sheet material through a conveying device to obtain a foaming product; in the whole process, the isolation device at the furnace mouth of the foaming furnace is in an open state, and the distance between the two isolation plates is 2m.
In view of the above examples and comparative examples, the inventors have conducted the following tests:
1. the power consumption of each production line is counted, and the counting result is as follows:
as can be seen from the comparison of the data on the upper table, the open area of the lower end of the furnace mouth is reduced by arranging an isolating device, the heat loss is effectively reduced, the consumption of electric energy is reduced, and the production cost is reduced.
2. Hot-pressing and laminating the upper and lower surfaces of the foaming materials obtained in the above examples and comparative examples to obtain a pad material, wherein PVC films with the thickness of 0.01 cm are adopted as the films, a hot-pressing roller without surface textures is adopted as the hot-pressing roller, the pressure is 2.4 MPa, and the temperature is 240 ℃; cutting the mat material into 1m multiplied by 1 m; the planeness of the obtained mat material is tested by adopting a three-coordinate measuring machine, points on two diagonal lines are selected to be measured as shown in figure 4, the points are numbered from left to right and are numbered from top to bottom in sequence by 1 to 17, the horizontal and vertical coordinates of the points are multiples of 10 cm, the mat material is only required to be analyzed in the process of changing the vertical coordinate of the mat material, the thickness of the mat material is estimated to be 1 cm, and the test result is as follows:
it is apparent from the above table that the average deviation in thickness of examples 1 and 2 is much smaller than that of the comparative example, and thus it can be seen that the present invention can improve the defect of the uneven thickness of the foamed material produced to some extent.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A vertical foaming device comprises a vertical foaming furnace (1), a horizontal preheating furnace (2) horizontally arranged at the top of the vertical foaming furnace and a conveying device (3) used for conveying sheets to be foamed and rolling the sheets which are completely foamed, wherein a furnace opening (11) is formed in the bottom of the vertical foaming furnace (1), and the vertical foaming device is characterized in that: an isolating device (12) is arranged at the position of the furnace mouth (11), the isolating device (12) comprises guide rails (121) arranged at two side edges (111) of the furnace mouth (11), two isolating plates (122) which are arranged on the basis of the guide rails (121) and are positioned on the same plane, and a driving device (123) used for driving the isolating plates (122) to move along the guide rails (121), and a channel area (4) is arranged between the two isolating plates (122); in a foaming state, the distance between the two isolation plates (122) is 8-20cm.
2. The vertical foaming apparatus according to claim 1, wherein the partition (122) comprises an upper surface layer (1221), a lower surface layer (1222), and an intermediate heat insulating layer (1223).
3. The vertical foaming apparatus according to claim 1, wherein the partition plate (122) is provided with a rectangular observation window (1224), and the rectangular observation window (1224) is embedded with a transparent tempered glass plate.
4. A vertical foaming apparatus according to claim 1, wherein the driving means (123) comprises a movable pulley (1231) provided on the partition (122), a fixed pulley (1232) provided on the guide rail, a secondary pulley (1233) coaxial with the fixed pulley, a motor (1234) driving the secondary pulley (1233), and a transmission member (1235) connecting the motor (1234) and the secondary pulley (1233), the movable pulley (1231) being in abutment with the guide rail (121), and the fixed pulley (1232) being in abutment with the partition (122).
5. The vertical foaming apparatus according to claim 4, wherein the isolation plate (122) is provided with a sliding groove (1225) which is matched with the fixed pulley (1232).
6. The vertical foaming apparatus according to claim 1, wherein a retaining ring (1226) for manually controlling the movement of the separating plate (122) is provided on the lower surface of the separating plate (122).
7. Vertical foaming apparatus according to claim 1, wherein the end of the guide rail (121) close to the passage zone (4) is provided with a stop protrusion (1211) integrally connected with the guide rail (121).
8. A foaming process using the vertical foaming equipment of any one of claims 1 to 7, which sequentially comprises the following steps: preheating, foaming, expansion, cooling, rolling, its characterized in that: in the whole process, an isolation device (12) of a furnace mouth (11) of the vertical foaming furnace (1) is in a closed state, and the distance between two isolation plates (122) is controlled to be 8-20cm.
9. A foaming process according to claim 8, characterized in that in the foaming process, the partition board (122) is opened every 1 to 1.5 hours to observe the deflection of the foamed sheet in the furnace, and the rotating speed and the distance between the spreading rollers (31) in the vertical foaming furnace (1) in the conveying device (3) are adjusted when the deflection is observed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110635540.7A CN113183388B (en) | 2021-06-08 | 2021-06-08 | Vertical foaming equipment and foaming process |
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| CN202110635540.7A CN113183388B (en) | 2021-06-08 | 2021-06-08 | Vertical foaming equipment and foaming process |
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| CN113183388A CN113183388A (en) | 2021-07-30 |
| CN113183388B true CN113183388B (en) | 2023-02-28 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203844085U (en) * | 2014-05-27 | 2014-09-24 | 上海岱鼎工业设备有限公司 | Foaming furnace body fire hole heat preservation door for producing cross-linked polyethylene foam coiled material |
| 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 |
| CN208949374U (en) * | 2018-10-15 | 2019-06-07 | 易门铜业有限公司 | A kind of high-grade matte converting furnace furnace insulation device |
-
2021
- 2021-06-08 CN CN202110635540.7A patent/CN113183388B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203844085U (en) * | 2014-05-27 | 2014-09-24 | 上海岱鼎工业设备有限公司 | Foaming furnace body fire hole heat preservation door for producing cross-linked polyethylene foam coiled material |
| CN208949374U (en) * | 2018-10-15 | 2019-06-07 | 易门铜业有限公司 | A kind of high-grade matte converting furnace furnace insulation device |
| 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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| CN113183388A (en) | 2021-07-30 |
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