CN109333902B - Vertical foaming equipment - Google Patents
Vertical foaming equipment Download PDFInfo
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- CN109333902B CN109333902B CN201811390948.7A CN201811390948A CN109333902B CN 109333902 B CN109333902 B CN 109333902B CN 201811390948 A CN201811390948 A CN 201811390948A CN 109333902 B CN109333902 B CN 109333902B
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- foaming
- furnace
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- vertical
- unfolding
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- 238000005187 foaming Methods 0.000 title claims abstract description 161
- 238000010438 heat treatment Methods 0.000 claims abstract description 48
- 230000000694 effects Effects 0.000 claims abstract description 14
- 238000004804 winding Methods 0.000 claims abstract description 8
- 238000002360 preparation method Methods 0.000 claims description 14
- 230000009471 action Effects 0.000 claims description 9
- 239000000498 cooling water Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 230000007480 spreading Effects 0.000 description 29
- 229920000098 polyolefin Polymers 0.000 description 11
- 239000006260 foam Substances 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 239000012752 auxiliary agent Substances 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000004719 irradiation crosslinked polyethylene Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention relates to the technical field of foaming furnaces, in particular to vertical foaming equipment. The device comprises a furnace body, a heating field arranged in the furnace body, and a roller set for feeding a sheet to be foamed into the furnace body for foaming and winding the sheet after foaming; the furnace body comprises a horizontal preheating furnace and a vertical foaming furnace in sequence, 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 in the first foaming section. The invention achieves the effect of high efficiency and energy saving by heightening the height of the vertical foaming furnace.
Description
Technical Field
The invention relates to the technical field of foaming furnaces, in particular to vertical foaming equipment.
Background
The polyolefin plastic has wide application range, good physical, chemical and mechanical properties, good toughness, flexibility and buffering performance, and electric insulation and heat insulation properties, and is widely applied to the fields of packaging, chemical industry, construction and the like. Polyolefin foam is widely used and is one of the first successfully produced foams.
The prior cross-linked polyolefin foaming process mainly comprises the steps of firstly kneading and granulating polyolefin raw materials and various auxiliary agents, adding the raw materials and the auxiliary agents into an extruder for plasticizing to obtain a polyolefin master slice with uniformly mixed components, and then foaming the master slice through a foaming furnace. There are two kinds of foaming furnaces commonly used at present, one is to use a horizontal furnace as a preheating section and a foaming section, and the other is to make a foaming master pass through a section of horizontal furnace first and then foam in a vertical furnace. In the second mode, the horizontal furnace mainly provides preheating of the polyolefin master, and after the polyolefin master reaching the vertical furnace is heated through intervals of different temperatures, the polyolefin master reaches a certain temperature, so that the foaming is facilitated, and the foaming quality is improved. The vertical furnace is a polyolefin master foaming section and is a main foaming completion 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 and form polyolefin foam in the master slice.
Patent document No. 201210171489.X discloses such an electron irradiation cross-linked polyethylene foaming device, including horizontal preheating device and the vertical foaming device that sets gradually, its vertical foaming device includes vertical foaming stove, vertical foaming stove is equipped with transition district, prefoaming district and foaming district in proper order from vertical feed inlet to vertical discharge gate.
Like the conventional foaming equipment, the sheet reaching the vertical foaming furnace after being preheated by the horizontal preheating furnace still cannot be foamed immediately, and needs to be subjected to transition to a certain degree. This is because the vertical section of the foaming furnace currently used is low, typically 5-6m, at which the uppermost section of the vertical foaming furnace, if not provided with heating means, cannot naturally reach the foaming temperature by the suction effect due to insufficient height, and if provided with heating means, will cause too high a temperature under the suction effect, so it is often chosen to be set as a transition section to avoid this. In addition, the sheet is heated and foamed while being rolled up in the vertical foaming furnace, and the vertical foaming furnace with such a height can lead the sheet to be discharged from the outlet of the vertical foaming furnace immediately after foaming, so that the cooling degree is insufficient. Meanwhile, in order to ensure the heating time and the heating degree of the sheet in the vertical foaming furnace, the rolling speed of the sheet is low, and therefore the productivity of the equipment is low.
Disclosure of Invention
The invention aims to solve the problems and provide the vertical foaming equipment with high productivity, energy conservation and consumption reduction.
The invention provides vertical foaming equipment, which comprises a furnace body, a heating field arranged in the furnace body and a roller set used for feeding a sheet to be foamed into the furnace body for foaming and winding the sheet after foaming; the furnace body comprises a horizontal preheating furnace and a vertical foaming furnace in sequence, 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 in the first foaming section.
Preferably, the vertical foaming furnace is 7-9m high.
Preferably, the vertical foaming furnace further comprises a second foaming section arranged at the discharge end of the first foaming section, a plurality of heating elements are arranged on the furnace wall of the second foaming section, and the heating field comprises a foaming heating field formed by the heating elements.
Preferably, the top and the bottom of the furnace body are respectively provided with a wind gap, and the high-temperature heating field is formed by the heating piece through an exhaust effect under the action of the wind gap.
Preferably, the horizontal preheating furnace sequentially comprises a preheating section and a foaming preparation section communicated with the first foaming section along the sheet entering direction; the air port is arranged at the top of the foaming preparation section, and the heating field comprises a heating preparation field formed by the heating piece under the action of the air port and applied to the foaming preparation section through an air draft effect.
Preferably, the vertical foaming furnace further comprises a spreading section arranged at the discharge end of the second foaming section, the spreading section is provided with a spreading device for spreading out expanded sheets after foaming and a driving device for driving the spreading device, the spreading device comprises at least one pair of spreading roller groups symmetrically arranged on two sides of the furnace wall of the spreading section, the spreading roller groups comprise at least two spreading rollers, the spreading rollers are arranged on the furnace wall through fixing pieces, the fixing pieces comprise a first mounting seat and a second mounting seat, the spreading rollers comprise a first supporting portion and a second supporting portion, the first mounting seat is rotationally connected with the first supporting portion, and the second mounting seat is rotationally connected with the second supporting portion.
Preferably, the first supporting part and the second supporting part divide the unfolding roller into a working section which is arranged at two sides of the sheet in a suspending way, a supporting section which is arranged on the fixing piece and a transmission section which is connected with the driving device, and the length of the working section is 2-3 times of that of the supporting section.
Preferably, the discharging end of the furnace body is provided with a cooling device, the cooling device comprises rollers respectively arranged at two sides of the sheet, and a cooling water cavity is arranged in the rollers.
Preferably, the arrangement density of the heating member is increased in the conveying direction of the foamed sheet in the vertical foaming furnace.
Preferably, the unfolding roller is hollow and is provided with a cooling water inlet.
The invention has the beneficial effects that:
1. The invention increases the height of the vertical foaming furnace to increase the rolling speed of the sheet material under the same heating time, thereby primarily increasing the productivity of the equipment.
2. After the vertical foaming furnace is increased, a section connected with the horizontal preheating furnace reaches the foaming temperature under the air draft effect and becomes a first foaming section, so that the length of an actual foaming area is increased, the heating time is also increased, and then the rolling speed of the sheet can be further increased in order to obtain the same foaming completion degree as before, thereby further improving the productivity of equipment.
3. Because the vertical foaming section is heightened, the residence time of heat energy in the vertical foaming furnace is longer, so that the temperature of the first foaming section and the second foaming section is higher than the traditional foaming temperature, and the time of high-fire baking in the oven is shorter than that of medium-fire baking, so that the residence time of the sheet in the vertical foaming furnace can be reduced to obtain the same foaming completion degree as before, and the rolling speed, namely the equipment productivity, is improved again.
4. In addition, the temperature of the first foaming section is naturally formed through the exhaust effect, additional heating is not needed, and energy conservation and consumption reduction are achieved.
5. The vertical foaming furnace is also provided with a spreading device for spreading the sheet, the spreading device pulls the sheet apart by spreading rollers which are arranged on two sides of the sheet and rotate towards the direction of the sheet, and the spreading rollers also need to have higher rotation speed at higher sheet winding speed of the invention.
Drawings
FIG. 1 is a schematic view of a vertical foaming apparatus;
Fig. 2 is a schematic view of a vertical foaming device for expanding a sheet.
In the figure: furnace body 100, tuyere 101, roller 102, horizontal preheating furnace 110, preheating section 111, foaming preparation section 112, vertical foaming furnace 120, first foaming section 121, second foaming section 122, expansion section 123, heating member 130, expansion device 140, expansion roller 141, driving device 150, fixing member 160, first mount 161, second mount 162, roller group 200.
Detailed Description
The following is a specific embodiment of the present invention, and the technical solution of the present invention is further described with reference to the accompanying drawings, but the present invention is not limited to these examples.
A vertical foaming apparatus, as shown in fig. 1, comprises a furnace body 100, a heating field arranged in the furnace body 100, and a roller set 200 for feeding a sheet to be foamed into the furnace body 100 for foaming and winding up the sheet after foaming; the furnace body 100 includes a horizontal preheating furnace 110 and a vertical foaming furnace 120 in this order.
Under the power of the roller set 200, the sheet to be foamed is preheated by the horizontal preheating furnace 110, enters the vertical foaming furnace 120 for foaming and is rolled to obtain a finished product. The speed of the roller set 200 determines the throughput efficiency of the apparatus.
Therefore, in order to improve the product efficiency of the device, the vertical foaming furnace 120 of the present invention is 6-10m high, and further, in this embodiment, the vertical foaming furnace 120 is 7-9m high, which is about 1.5 times that of the conventional vertical foaming furnace, and in order to ensure the original foaming completion degree without considering other influencing factors, the winding speed can be improved by about 1.5 times, which is about 1.5 times that of the original productivity.
However, the advantage brought by heightening the vertical foaming furnace 120 is not only that, because the top and the bottom of the furnace body 100 are respectively provided with the air port 101, under the action of the air port and the action of the vertical height, the air draft effect can be generated in the vertical foaming furnace 120, so that the vertical foaming furnace 120 sequentially comprises a first foaming section 121 connected with the discharge end of the horizontal preheating furnace 110 and a second foaming section 122 arranged at the discharge end of the first foaming section 121 from top to bottom, wherein the furnace wall of the second foaming section 122 is provided with a plurality of heating elements 130, the heating elements 130 form a foaming heating field in the second foaming section 122, and meanwhile, a high-temperature heating field is formed in the first foaming section 121 through the air draft effect under the action of the air port.
The sheet transferred from the horizontal preheating furnace 110 to the vertical foaming furnace 120 is foamed at the first foaming section 121 at the moment of transfer. The length of the actual foaming section is increased compared to a conventional foaming furnace, i.e. the time the sheet stays in the actual foaming section is increased. Meanwhile, due to the heightened vertical foaming furnace 120, the time during which the thermal energy itself stays in the actual foaming section increases, so that the temperature increases. Two factors affecting foaming: the foaming time and the foaming temperature are increased compared with the traditional foaming furnace, so that the winding speed can be increased again in order to ensure the original foaming completion degree, and the productivity efficiency of the equipment is further improved.
In this embodiment, the vertical foaming furnace 120 is raised by about 1.5 times, so that the product productivity of the final apparatus can be improved from 7m/min to more than 20 m/min.
Further, the setting density of the heating element 130 is increased along the conveying direction of the foamed sheet in the vertical foaming furnace 120, so as to ensure the uniform temperature in the first foaming section 121 and the second foaming section 122, and further reduce the use of the heating element 130, thereby saving energy and reducing consumption.
Further, the horizontal preheating furnace 110 includes a preheating section 111 and a foaming preparation section 112 communicating with the first foaming section 121 in this order in the sheet entering direction; the tuyere 101 is provided at the top of the foaming preparation section 112, and the heating field includes a heating preparation field formed by the heating member 130 applied to the foaming preparation section 112 by an exhaust effect under the action of the tuyere. A foaming preparation section 112 is arranged in the horizontal preheating furnace 110, separates the preheating section 111 from the vertical foaming furnace 120, prevents the gradual heating effect in the preheating section 111 from being influenced by the air draft effect, and provides temperature transition for foaming.
As shown in fig. 2, when the sheet is foamed in the vertical foaming furnace 120, expansion in thickness and width occurs, and at this time, the sheet is in a semi-molten state, and if not timely unfolded, the sheets overlap each other and adhere to each other, affecting the quality of the finished product, so that the sheet needs to be timely unfolded by the unfolding device 140.
The vertical foaming furnace 120 further comprises a spreading section 123 arranged at the discharge end of the second foaming section 122, the spreading section 123 is provided with a spreading device 140 for spreading out the expanded sheet after foaming and a driving device 150 for driving the spreading device 140, the spreading device 140 comprises at least one pair of spreading roller sets symmetrically arranged at two sides of the furnace wall of the spreading section 123, the spreading roller sets comprise at least two spreading rollers 141, the spreading rollers 141 are arranged at the furnace wall through fixing pieces 160, the fixing pieces 160 comprise a first mounting seat 161 and a second mounting seat 162, the spreading rollers 141 comprise a first supporting part and a second supporting part, the first mounting seat 161 is rotationally connected with the first supporting part, and the second mounting seat 162 is rotationally connected with the second supporting part.
The first supporting part and the second supporting part divide the unfolding roller 141 into a working section which is arranged at two sides of the sheet in a suspending manner, a supporting section which is arranged at the fixing piece 160 and a transmission section which is connected with the driving device 150, and the length of the working section is 2-3 times that of the supporting section.
Wherein, the unfolding roller 141 stabilizes the suspended working section thereof through the supporting points and the limiting points provided by the first mounting seat 161 and the second mounting seat 162, so that the unfolding roller can rotate at a high speed to unfold the sheet even at a high winding speed, and meanwhile, the unfolding quality of the sheet is not affected by shaking.
After foaming and expansion are completed, the sheet needs to be cooled to be rolled to obtain a finished product, so that the inside of the expansion roller 141 can be hollow and provided with a cooling water inlet, and cooling water is introduced into the expansion roller 141 to cool the sheet while expanding the sheet.
Meanwhile, a cooling device is arranged at the discharge end of the furnace body 100, the cooling device comprises rollers 102 respectively arranged at two sides of the sheet, a cooling water cavity is arranged in the rollers 102, and the sheet is cooled while being tensioned and flattened through the rollers 102.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (7)
1. A vertical foaming device, characterized in that: the device comprises a furnace body, a heating field arranged in the furnace body and a roller group (200) for feeding a sheet to be foamed into the furnace body for foaming and winding the sheet after foaming; the furnace body sequentially comprises a horizontal preheating furnace (110) and a vertical foaming furnace (120), wherein the vertical foaming furnace (120) is 6-10m high, the vertical foaming furnace (120) comprises a first foaming section (121) connected with the discharge end of the horizontal preheating furnace (110), and the heating field comprises a high-temperature heating field arranged on the first foaming section (121);
The vertical foaming furnace (120) further comprises a second foaming section (122) arranged at the discharge end of the first foaming section (121), a plurality of heating elements (130) are arranged on the furnace wall of the second foaming section (122), and the heating field comprises a foaming heating field formed by the heating elements (130);
The top and the bottom of the furnace body are respectively provided with a top air opening and a bottom air opening, and the high-temperature heating field is formed by the heating piece (130) through an exhaust effect under the action of the top air opening and the bottom air opening;
the top tuyere and the bottom tuyere are not on the same vertical line;
the horizontal preheating furnace (110) sequentially comprises a preheating section (111) and a foaming preparation section (112) communicated with the first foaming section (121) along the sheet entering direction; the top tuyere is arranged at the top of the foaming preparation section (112), and the heating field comprises a heating preparation field formed by the heating piece (130) under the action of the top tuyere and the bottom tuyere and applied to the foaming preparation section (112) through an air suction effect.
2. A vertical foaming apparatus according to claim 1, wherein: the height of the vertical foaming furnace (120) is 7-9m.
3. A vertical foaming apparatus according to claim 1, wherein: the vertical foaming furnace (120) further comprises a unfolding section (123) arranged at the discharging end of the second foaming section (122), the unfolding section (123) is provided with a unfolding device (140) for flattening expanded sheets after foaming and a driving device (150) for driving the unfolding device (140), the unfolding device (140) comprises at least one pair of unfolding roller groups symmetrically arranged on two sides of the furnace wall of the unfolding section (123), each unfolding roller group comprises at least two unfolding rollers (141), each unfolding roller (141) is arranged on the furnace wall through a fixing piece (160), each fixing piece (160) comprises a first mounting seat (161) and a second mounting seat (162), each unfolding roller (141) comprises a first supporting portion and a second supporting portion, each first mounting seat (161) is rotationally connected with each first supporting portion, and each second mounting seat (162) is rotationally connected with each second supporting portion.
4. A vertical foaming apparatus according to claim 3, wherein: the first supporting part and the second supporting part divide the unfolding roller (141) into a working section which is arranged at two sides of the sheet in a suspending way, a supporting section which is arranged at a fixing piece (160) and a transmission section which is connected with the driving device (150), and the length of the working section is 2-3 times that of the supporting section.
5. A vertical foaming apparatus according to claim 1, wherein: the cooling device is arranged at the discharge end of the furnace body and comprises rollers (102) arranged on two sides of the sheet respectively, and a cooling water cavity is arranged in each roller (102).
6. A vertical foaming apparatus according to claim 1, wherein: the arrangement density of the heating element (130) increases along the conveying direction of the foaming sheet material in the vertical foaming furnace (120).
7. A vertical foaming apparatus according to claim 3, wherein: the unfolding roller (141) is hollow and is provided with a cooling water inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811390948.7A CN109333902B (en) | 2018-11-21 | 2018-11-21 | Vertical foaming equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811390948.7A CN109333902B (en) | 2018-11-21 | 2018-11-21 | Vertical foaming equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109333902A CN109333902A (en) | 2019-02-15 |
| CN109333902B true CN109333902B (en) | 2024-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811390948.7A Active CN109333902B (en) | 2018-11-21 | 2018-11-21 | Vertical foaming equipment |
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| CN (1) | CN109333902B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115631900A (en) * | 2019-07-26 | 2023-01-20 | 无锡鑫宏业线缆科技股份有限公司 | Processing system of cable for new energy electric vehicle |
| CN110640961A (en) * | 2019-10-28 | 2020-01-03 | 安徽艾迪文新材料有限公司 | Natural gas pneumatic vertical foaming system |
| CN110871542A (en) * | 2019-11-21 | 2020-03-10 | 宁波秦鼎材料科技有限公司 | Vertical continuous foaming equipment for polyolefin |
| CN111703006A (en) * | 2020-05-22 | 2020-09-25 | 浙江润阳新材料科技股份有限公司 | Foaming system of strip-shaped high polymer material |
| CN113183389A (en) * | 2021-06-08 | 2021-07-30 | 浙江润阳新材料科技股份有限公司 | Foaming furnace with monitoring and alarming functions and foaming process |
| CN113183388B (en) * | 2021-06-08 | 2023-02-28 | 浙江润阳新材料科技股份有限公司 | Vertical foaming equipment and foaming process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN207028028U (en) * | 2017-06-16 | 2018-02-23 | 杭州临安鑫烽包装材料有限公司 | A kind of irradiated crosslinked polyalkene foaming equipment |
| CN108015953A (en) * | 2018-01-11 | 2018-05-11 | 浙江润阳新材料科技股份有限公司 | A kind of amplitude-expanding device for foaming furnace |
| CN209111359U (en) * | 2018-11-21 | 2019-07-16 | 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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2018
- 2018-11-21 CN CN201811390948.7A patent/CN109333902B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207028028U (en) * | 2017-06-16 | 2018-02-23 | 杭州临安鑫烽包装材料有限公司 | A kind of irradiated crosslinked polyalkene foaming equipment |
| CN108015953A (en) * | 2018-01-11 | 2018-05-11 | 浙江润阳新材料科技股份有限公司 | A kind of amplitude-expanding device for foaming furnace |
| CN209111359U (en) * | 2018-11-21 | 2019-07-16 | 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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| CN109333902A (en) | 2019-02-15 |
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