CN211165411U - Hot air circulating device of glue-free fiber bar heat setting machine - Google Patents
Hot air circulating device of glue-free fiber bar heat setting machine Download PDFInfo
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- CN211165411U CN211165411U CN201922067781.7U CN201922067781U CN211165411U CN 211165411 U CN211165411 U CN 211165411U CN 201922067781 U CN201922067781 U CN 201922067781U CN 211165411 U CN211165411 U CN 211165411U
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Abstract
The utility model relates to an exempt from glued fibre bar heat setting machine's heated air circulation device uses with exempting from to glue fibre bar heat setting machine is supporting, is applicable to and exempts from glued fibre bar heating design. Comprises a centrifugal fan, an air suction hood, an air outlet hood, an induced draft pipe and an air supply pipe; centrifugal fan installs in heat setting frame lower part, and the cover that induced drafts is installed on the heat setting machine tow passageway export heat balance district upper portion in tow heating melting district, goes out the fan housing and installs the gluey tow entry lower part of exempting from at heat setting machine case, goes out fan housing and upwards installs, goes out the fan housing and upwards is provided with a plurality of air-out notches, and the hot-blast glue tow of exempting from that is used for preheating that blows off, and the centrifugal fan air intake links to each other with the cover that induced drafts through the induced duct, and the centrifugal fan air outlet is. The hot air circulating device preheats the glue-free fiber bundle by utilizing hot air at the outlet of the glue-free fiber bar, accelerates the heating, melting and curing heat setting speed of the glue-free fiber, ensures that the heating temperature of the box body is uniform, and saves heating energy by utilizing waste heat.
Description
Technical Field
The utility model relates to an exempt from glued fibre bar heat setting machine's heated air circulation device, with exempt from the supporting use of glued fibre bar heat setting machine, be applicable to and exempt from glued fibre bar heating design.
Background
At present, fiber pen points, fiber water guide rods, fiber volatilization rods and fiber filter materials which are produced at home and abroad, the fiber pen points, the fiber water guide rods, the fiber volatilization rods and the fiber filter materials are made into pen points, water absorption rods and filter rods by adopting elastic long fibers or short fibers and bundling, the rods form a capillary water absorption effect after pre-setting impregnation and heat setting drying, then the rods are cut off and polished, the glue soaked in the production process can release very serious pungent smell, and organic solvents such as ethyl acetate are toxic and flammable in the manufacturing process, and are explosive or even cause fire to cause life and property loss. Causing great damage to people and the environment. Wash at the back and add the poisonous dust of polishing in-process still can produce and take the glue, poisonous dust causes very big bodily injury for the producers, can cause a large amount of environmental pollution in discharging the air through the exhaust fan, though taken certainly to collect the measure of environmental protection to the dust, reduced the part to air pollution, but collect the dust because the inside contains glue can not cyclic recovery utilize, dust rubbish causes a big nuisanced. And (3) dipping the loose materials in a glue tank, scraping glue by a mould, drying by hot air, and drying to obtain the bar stock.
Although there is a glue fiber-free bar heat setting machine, a fiber bundle channel pipe arranged in each heating zone in a machine box body adopts a round metal heat conduction pipe, the metal heat conduction pipe is 15-35mm, and because the glue fiber-free bar is longer in ratio and hangs in the horizontal direction, the glue fiber-free bar can hang down to touch the wall of the metal heat conduction pipe in the heating setting process, so that the upper and lower peripheries of the formed glue fiber-free bar are inconsistent in hardness, and the product quality is influenced.
Disclosure of Invention
The utility model aims at the above-mentioned weak point provide an exempt from adhesive fiber bar heat setting machine's heated air circulation device, with exempt from the supporting use of adhesive fiber bar heat setting machine, can ensure that heating design district temperature is even, exempt from adhesive fiber bundle can not touch long waist shape heating pore wall in heating channel, the temperature keeps unanimous in making exempt from adhesive fiber heating design, makes the solidification shaping exempt from the adhesive fiber bar about, the soft or hard is unanimous all around, ensures product quality. Because the hot air circulating device is arranged, the glue-free fiber bundle inlet is preheated by hot air at the position of the glue-free fiber bar outlet, the glue-free fiber heating, curing and heat setting speed is accelerated, the heating temperature of the box body is uniform, the waste heat is utilized, the heating energy can be saved, and the purposes of energy conservation and emission reduction are achieved.
A hot air circulating device of a glue-free fiber bar heat setting machine is realized by adopting the following technical scheme:
a hot air circulating device of a glue-free fiber bar heat setting machine comprises a centrifugal fan, an air suction hood, an air outlet hood, an air guide pipe and an air supply pipe. Centrifugal fan installs in heat setting frame lower part, and the cover that induced drafts is installed on the heat setting machine tow passageway export heat balance district upper portion in tow heating melting district, goes out the fan housing and installs the gluey tow entry lower part of exempting from at heat setting machine case, goes out fan housing and upwards installs, goes out the fan housing and upwards is provided with a plurality of air-out notches, and the hot-blast glue tow of exempting from that is used for preheating that blows off, and the centrifugal fan air intake links to each other with the cover that induced drafts through the induced duct, and the centrifugal fan air outlet is.
The centrifugal fan air intake is through the induced duct, the cover that induced drafts, the glue-free tow passageway export of heat-setting machine case tow heating melting district, before the glue-free tow of heating melting gets into tow solidification shaping district, the heat that distributes out among the cooling process forms hot-blastly, draw out centrifugal fan, through forcing back through the blast pipe entering air-out cover, blow and preheat on the glue-free tow of leading in from the heat-setting machine case outside, make full use of waste heat, improve the glue-free fibre temperature, accelerate glue-free fibre preheating rate, carry out heated air circulation heating, the energy has been practiced thrift greatly, the electrothermal tube heating electric energy is practiced thrift, be favorable to glue-free fibre solidification shaping again.
The heat setting machine case is of a closed structure, and case plates are arranged on the periphery of the heat setting machine case.
A hot air circulating device of a glue-free fiber bar heat setting machine is matched with the glue-free fiber bar heat setting machine for use, and the heat setting method of the glue-free fiber bar heat setting machine comprises the following steps:
1. and warping and bundling the elastic sheath-core untwisted composite filaments by a warping device to obtain the elastic sheath-core untwisted composite filament bundling fiber.
The specification of the elasticated sheath-core untwisted composite filament (PTY) is required to meet the specifications of glue-free fiber rods for different purposes, and the elasticated sheath-core untwisted composite filament with different specifications is selected for warping and bundling.
The number of bunched strands is determined according to the size, hardness and porosity of the processed fiber material, the porosity is usually desired to be large, the thickness (dPF) of each fiber of the elastic sheath-core untwisted composite filament is correspondingly large, the thickness (dPF) of each fiber of the elastic sheath-core untwisted composite filament is 3-20D (mesh), and D is the gram weight of 9000 meters.
The soft and hard hand feeling is adjusted by the number of the bundling fibers, and the more the number of the bundling fibers of the bar stock with the same specification is, the higher the hardness is.
If the composite filament needs to be particularly soft and has elastic bars, the combination of the materials of the sheath layer and the core layer of the elastic sheath-core untwisted composite filament is changed. The skin layer is made of nylon 6 or elastomer TPU (thermoplastic polyurethane) and is used as the skin layer, and the core layer is made of nylon 66 or elastomer TPE and is particularly soft.
2. Controlling certain tension and tightness of the beamed and gathered elastic sheath-core untwisted composite filament bundling fibers, enabling the beamed and gathered elastic sheath-core untwisted composite filament bundling fibers to enter a glue-free fiber bar heat setting machine, wherein the tension is 0.5-1N Newton, a heat setting machine box body is arranged in the glue-free fiber bar heat setting machine, and a plurality of fiber bundle temperature preheating areas and a plurality of fiber bundle heating melting areas are arranged in the machine box body. A fiber bundle temperature uniform constant area is arranged between the fiber bundle temperature preheating areas, and a fiber bundle temperature uniform constant area is arranged between the fiber bundle heating melting areas.
The inlet of the glue-free fiber bundle in the first preheating zone is provided with a fiber bundle leading-in ring, so that the glue-free fiber bundle can be conveniently led into the fiber bundle temperature preheating zone, and the heating combination module devices are respectively arranged in the plurality of fiber bundle temperature preheating zones and the plurality of fiber bundle heating melting zones.
A plurality of long waist-shaped heating holes in heating modules arranged in a plurality of fiber bundle temperature preheating zones and a plurality of fiber bundle heating melting zones are aligned to form a plurality of fiber bundle channels, and each fiber bundle channel is kept at the same straight line position.
The temperature of the fiber bundle preheating zone is 100-200 ℃, the temperature of the fiber bundle heating and melting zone is 180-250 ℃, and the temperature of the fiber bundle curing and forming zone is 180-250 ℃. A plurality of fiber bundle channels are respectively arranged in a preheating zone, a heating melting zone and a fixed forming zone, the elastic sheath core untwisted composite filament bundling fiber sequentially passes through a fiber bundle temperature preheating zone and a long waist-shaped heating hole of a heating module in the fiber bundle heating melting zone to form a plurality of fiber bundle channels, the elastic sheath core untwisted composite filament bundling fiber is subjected to thermal shrinkage and fluffing in the fiber bundle temperature preheating zone, the elastic sheath core untwisted composite filament bundling fiber passes through a fiber bundle heating melting zone to melt the elastic sheath core untwisted composite filament skin layer in the bundling fiber, then enters a fiber bundle curing forming zone and is provided with a precise curing forming combined die, the heat and the fiber tension are balanced in the fiber bundle curing forming zone, the elastic sheath core untwisted composite filaments in the bundling fiber are bonded together after the skin layer is melted, and finally the fiber bundle is subjected to precise curing forming combined die, drawing out the fiber rod by a tractor, cooling the fiber rod by normal temperature air, wherein the cooling length is 1-2m, and preparing the non-glue fiber rod.
The utility model provides an exempt from glued fibre bar heat setting machine's heated air circulation device, use with exempting from to glue fibre bar heat setting machine is supporting, a exempt from glued fibre bar heat setting machine reasonable in design, moreover, the steam generator is compact in structure, because be provided with a plurality of heating composite module devices, heated air circulation device, accurate solidification shaping assembling die, can ensure that heating design district temperature is even, exempt from glued fibre to restraint can not touch long waist shape heating pore wall in the heating channel, the temperature keeps unanimous in the messenger exempts from glued fibre heating design, make solidification shaping exempt from glued fibre bar about, soft or hard is unanimous all around, ensure product quality. Because the hot air circulating device is arranged, the glue-free fiber bundle is preheated at the outlet of the glue-free fiber bar stock at the inlet of the heating and shaping case, so that the heating and curing speed of the glue-free fiber is increased, the heating temperature of the case body is uniform, the waste heat is utilized, the heating energy can be saved, and the purposes of energy conservation and emission reduction are achieved.
Drawings
The present invention will be further explained with reference to the accompanying drawings:
FIG. 1 is a schematic view of a glue-free fiber bar heat setting machine;
FIG. 2 is a perspective view of the internal structure of the glue-free fiber bar heat setting machine;
FIG. 3 is a schematic structural diagram of a heating combination module device and a hot air circulation device of a glue-free fiber bar heat setting machine.
In the figure: 1. the device comprises a heat setting rack, 2, a heating combined module device, 3, a plurality of fiber bundle temperature uniform constant areas, 4, a plurality of fiber bundle temperature preheating areas, 5, a plurality of fiber bundle heating melting areas, 6, a fiber bundle curing forming area, 7, an accurate curing forming die mounting support, 8, a hot air circulating device, 9, a fiber bundle guiding ring and 10, an accurate curing forming combined die;
1-1, a heat setting cabinet, 2-1, a heating module, 2-2, an electric heating tube, 2-3 and a temperature sensor;
8-1 parts of a centrifugal fan, 8-2 parts of an air suction hood, 8-3 parts of an air outlet hood, 8-4 parts of an air guide pipe, 8-5 parts of an air supply pipe, 8-6 parts of an air supply pipe;
2-1-1 of long waist-shaped heating holes, 2-1-2 of electric heating pipe mounting holes; 8-3-1 and an air outlet notch.
Detailed Description
Referring to the attached drawings 1-3, the glue-free fiber bar heat setting machine comprises a heat setting rack 1, a heating combined module device 2, a plurality of fiber bundle temperature uniform constant areas 3, a plurality of fiber bundle temperature preheating areas 4, a plurality of fiber bundle heating melting areas 5, a fiber bundle curing forming area 6, an accurate curing forming combined die 10 and a hot air circulating device 8.
The upper part of the heat setting frame 1 is provided with a heat setting machine case 1-1, and the heat setting machine case 1-1 is internally provided with a plurality of fiber bundle temperature preheating zones 4 and a plurality of fiber bundle heating melting zones 5. A fiber bundle temperature uniform constant area 3 is arranged between the fiber bundle temperature preheating areas 4, and a fiber bundle temperature uniform constant area 3 is arranged between the fiber bundle heating melting areas 5.
A fiber bundle leading-in ring 9 is arranged at the inlet of the glue-free fiber bundle in the first fiber bundle temperature preheating zone, so that the glue-free fiber bundle can be conveniently led into the fiber bundle temperature preheating zone 4, and the heating combination module devices 2 are respectively arranged in the plurality of fiber bundle temperature preheating zones 4 and the plurality of fiber bundle heating melting zones 5.
The heating combined module device 2 comprises a heating module 2-1, an electric heating tube 2-2, a temperature sensor 2-3 and a temperature controller.
The heating module 2-1 is internally provided with a plurality of long waist-shaped heating holes 2-1-1, and the long waist-shaped heating holes 2-1-1 are uniformly and vertically arranged in the heating module 2-1.
A plurality of electric heating pipe mounting holes 2-1-2 are arranged at the upper part and the lower part of the heating module 2-1, and the electric heating pipes 2-2 are arranged in the electric heating pipe mounting holes 2-1-2. The electric heating pipe installation holes 2-1-2 are respectively and uniformly distributed at the upper part and the lower part of the long waist-shaped heating holes 2-1-1 and are not communicated with the long waist-shaped heating holes. The heating module 2-1 is provided with 20-40 long waist-shaped heating holes 2-1-1.
One side of the heating module 2-1 is provided with a temperature sensor 2-3, the temperature sensor 2-3 is connected with a temperature controller arranged in the control cabinet through a transmission cable, the temperature controller sets heating temperature according to different zones, and the heating temperature of the electric heating tube is controlled through a control cable. And a temperature sensor is arranged in the fiber bundle curing and forming area and is connected with a temperature controller through a transmission cable.
The temperature sensor adopts a temperature sensor sold in the market. The temperature controller adopts a temperature controller sold in the market.
The temperature of the fiber bundle preheating zone 4 is set to be 100-200 ℃. The temperature of the fiber bundle heating melting zone 5 is set to be 180-250 ℃.
The heating module 2-1 is made of metal materials with good heat conductivity, such as aluminum, copper, stainless steel and the like.
A plurality of long waist-shaped heating holes 2-1-1 in a heating module 2-1 arranged in a plurality of fiber bundle temperature preheating zones 4 and a plurality of fiber bundle heating melting zones 5 are aligned to form a plurality of fiber bundle channels, and each fiber bundle channel is kept at the same straight line position.
The front part of the fiber bundle heating and melting area 5 is provided with a fiber bundle curing and forming area 6, the fiber bundle curing and forming area 6 is provided with an accurate curing and forming die mounting bracket 7, an accurate curing and forming combined die 10 is mounted on the accurate curing and forming die mounting bracket 7, and the heating and melting fiber bundle is cured and formed through the accurate curing and forming combined die 10. The temperature of the fiber bundle solidification forming area 6 is set to 180 ℃ and 250 ℃.
The precise curing molding combined die 10 is composed of a first curing molding sleeve die and a second curing molding sleeve die, the first curing molding sleeve die is sleeved at the outlet of a fiber bundle channel pipe of a heat-setting machine, the second curing molding sleeve die is sleeved at the front end part of the first curing molding sleeve die, the inner diameter of the second curing molding sleeve die is smaller than the inner diameter of the first curing molding sleeve die, the heating and melting fiber bundle is conveniently cooled through the first curing molding sleeve die, the curing molding is realized, and the outer diameter of a product is precisely controlled through the second shrinkage of the curing molding sleeve die, so that the design requirements are met.
The heat setting machine case 1-1 is a closed structure, case boards are arranged on the periphery of the heat setting machine case, and the heat setting machine is provided with a hot air circulating device 8.
A hot air circulating device 8 of a glue-free fiber bar heat setting machine comprises a centrifugal fan 8-1, an air suction hood 8-2, an air outlet hood 8-3, an air guide pipe 8-4 and an air supply pipe 8-5. The centrifugal fan 8-1 is arranged at the lower part of the heat setting frame 1, the air suction hood 8-2 is arranged at the upper part of the heat balance area 3 at the fiber bundle channel outlet of the heat setting machine of the fiber bundle heating melting area, the air outlet hood 8-3 is arranged at the lower part of the glue-free fiber bundle inlet of the heat setting box, the air outlet hood 8-3 is upwards arranged, the air outlet hood 8-3 is upwards provided with a plurality of air outlet notches 8-3-1, blown hot air is used for preheating the glue-free fiber bundles, the air inlet of the centrifugal fan 8-1 is connected with the air suction hood 8-2 through an induced draft pipe 8-4, and the air outlet of the centrifugal fan 8-4 is connected with the air outlet hood.
An air inlet of the centrifugal fan 8-1 is used for heating an adhesive-free fiber bundle channel outlet of a melting area of a fiber bundle of a case of the heat setting machine through an air induction pipe 8-4 and an air suction hood 8-2, heat emitted in the cooling process forms hot air before the adhesive-free fiber bundle is heated and melted to enter a fiber bundle curing and forming area, the hot air is pumped to the centrifugal fan 8-1, the hot air is pressurized and then enters an air outlet hood 8-3 through an air supply pipe 8-6, the hot air is blown onto the adhesive-free fiber bundle introduced from the outside of the case 1-1 to be preheated, waste heat is fully utilized, the temperature of the adhesive-free fiber is increased, the preheating speed of the adhesive-free fiber is accelerated, hot air circulation heating is carried out, energy sources are greatly saved, the heating electric.
A hot air circulating device of a glue-free fiber bar heat setting machine is matched with the glue-free fiber bar heat setting machine for use, and the heat setting method of the glue-free fiber bar heat setting machine comprises the following steps:
1. and warping and bundling the elastic sheath-core untwisted composite filaments by a warping device to obtain the elastic sheath-core untwisted composite filament bundling fiber.
The specification of the elasticated sheath-core untwisted composite filament (PTY) is required to meet the specifications of glue-free fiber rods for different purposes, and the elasticated sheath-core untwisted composite filament with different specifications is selected for warping and bundling.
The number of bunched strands is determined according to the size, hardness and porosity of the processed fiber material, the porosity is usually desired to be large, the thickness (dPF) of each fiber of the elastic sheath-core untwisted composite filament is correspondingly large, the thickness (dPF) of each fiber of the elastic sheath-core untwisted composite filament is 3-20D (mesh), and D is the gram weight of 9000 meters.
The soft and hard hand feeling is adjusted by the number of the bundling fibers, and the more the number of the bundling fibers of the bar stock with the same specification is, the higher the hardness is.
If the composite filament needs to be particularly soft and has elastic bars, the combination of the materials of the sheath layer and the core layer of the elastic sheath-core untwisted composite filament is changed. The skin layer is made of nylon 6 or elastomer TPU (thermoplastic polyurethane) and is used as the skin layer, and the core layer is made of nylon 66 or elastomer TPE and is particularly soft.
2. Controlling certain tension and tightness of the beamed and gathered elastic sheath-core untwisted composite filament bundling fibers, enabling the beamed and gathered elastic sheath-core untwisted composite filament bundling fibers to enter a glue-free fiber bar heat setting machine, wherein the tension is 0.5-1N newtons, a heat setting machine case 1-1 is arranged in the glue-free fiber bar heat setting machine, and a plurality of fiber bundle temperature preheating areas 4 and a plurality of fiber bundle heating melting areas 5 are arranged in the machine case 1-1. A fiber bundle temperature uniform constant area 3 is arranged between the fiber bundle temperature preheating areas 4, and a fiber bundle temperature uniform constant area 3 is arranged between the fiber bundle heating melting areas 5.
The inlet of the glue-free fiber bundle in the first preheating zone is provided with a fiber bundle leading-in ring 9 which is convenient for leading the glue-free fiber bundle into the fiber bundle temperature preheating zone 4, and the heating combination module devices 2 are respectively arranged in the plurality of fiber bundle temperature preheating zones 4 and the plurality of fiber bundle heating melting zones 5.
A plurality of long waist-shaped heating holes 2-1-1 in heating modules arranged in a plurality of fiber bundle temperature preheating zones 4 and a plurality of fiber bundle heating melting zones 5 are aligned to form a plurality of fiber bundle channels, and each fiber bundle channel is kept at the same straight line position.
The temperature of the fiber bundle preheating zone is 100-200 ℃, the temperature of the fiber bundle heating and melting zone is 180-250 ℃, and the temperature of the fiber bundle curing and forming zone is 180-250 ℃. A plurality of fiber bundle channels are respectively arranged in a preheating zone, a heating melting zone and a fixed forming zone, the elastic sheath core untwisted composite filament bundling fiber sequentially passes through a fiber bundle temperature preheating zone 4 and a long waist-shaped heating hole 2-1-1 of a heating module in a plurality of fiber bundle heating melting zones 5 to form a plurality of fiber bundle channels, the elastic sheath core untwisted composite filament bundling fiber is subjected to thermal contraction and fluffing in the fiber bundle temperature preheating zone 4, the elastic sheath core untwisted composite filament bundling fiber passes through the fiber bundle heating melting zone to melt the elastic sheath core untwisted composite filament skin layer in the bundling fiber, then enters the fiber bundle curing forming zone 6 and is provided with a precise curing forming combined mold 10, the heat and the fiber tension are self-balanced in the fiber bundle curing forming zone 6, the skin layer is melted, and then a plurality of elastic sheath core untwisted composite filaments in the bundling fiber are bonded together, and finally, drawing and pulling out the combined die 10 through a tractor, and cooling the combined die by air at normal temperature to prepare the glue-free fiber bar.
Claims (4)
1. A hot air circulating device of a glue-free fiber bar heat setting machine, which is characterized in that,
comprises a centrifugal fan, an air suction hood, an air outlet hood, an induced draft pipe and an air supply pipe; centrifugal fan installs in heat setting frame lower part, and the cover that induced drafts is installed on the heat setting machine tow passageway export heat balance district upper portion in tow heating melting district, goes out the fan housing and installs the gluey tow entry lower part of exempting from at heat setting machine case, goes out fan housing and upwards installs, goes out the fan housing and upwards is provided with a plurality of air-out notches, and the hot-blast glue tow of exempting from that is used for preheating that blows off, and the centrifugal fan air intake links to each other with the cover that induced drafts through the induced duct, and the centrifugal fan air outlet is.
2. The hot air circulation device of the glue-free fiber bar heat setting machine as claimed in claim 1, wherein the air inlet of the centrifugal fan passes through the air inducing pipe and the air suction hood to heat the fiber bundle of the heat setting machine case to the outlet of the glue-free fiber bundle passage in the melting zone, and before the glue-free fiber bundle enters the fiber bundle solidification forming zone, the heat emitted during the cooling process forms hot air which is pumped to the centrifugal fan, and after being pressurized, the hot air enters the air outlet hood through the air supply pipe, and is blown to the glue-free fiber bundle introduced from the outside of the case to be preheated, thereby fully utilizing the waste heat and increasing the temperature of the glue-free fiber.
3. The hot air circulation device of the glue-free fiber bar heat setting machine as claimed in claim 1, wherein the heat setting machine box is a closed structure and is provided with box plates on the periphery.
4. The hot air circulation device for the heat setting machine of glue-free fiber bar as claimed in claim 1, wherein the temperature of the fiber bundle heating and melting zone is set to 180-250 ℃, and the temperature of the fiber bundle curing and forming zone is set to 180-250 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922067781.7U CN211165411U (en) | 2019-11-26 | 2019-11-26 | Hot air circulating device of glue-free fiber bar heat setting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922067781.7U CN211165411U (en) | 2019-11-26 | 2019-11-26 | Hot air circulating device of glue-free fiber bar heat setting machine |
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| Publication Number | Publication Date |
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| CN211165411U true CN211165411U (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922067781.7U Active CN211165411U (en) | 2019-11-26 | 2019-11-26 | Hot air circulating device of glue-free fiber bar heat setting machine |
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| Country | Link |
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| CN (1) | CN211165411U (en) |
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2019
- 2019-11-26 CN CN201922067781.7U patent/CN211165411U/en active Active
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