A wet process for preparing low density, high resiliency glass fiber mat

Abstract

The application discloses a kind of low-density, high-elasticity glass fiber felt wet process, it is related to the technical field of glass fiber felt production, comprising: ① incoming glass fiber is sent to cotton opener to be mixed and opened sufficiently and remove iron;② after opening, by cotton fan to cotton mixing box, cotton mixing box will the above-mentioned opened fiber evenly cotton, then by fan to cotton feeder;③ by cotton feeder, the opened fiber is evenly laid on the feed-in curtain of carding machine;④ carding machine will the above-mentioned laid fiber be carded into evenly distributed fiber web, and be sent to spray lubricating device;⑤ by spray lubricating device, the solution dissolved with additive is fully sprayed on fiber web, and is sent to dehumidification equipment;⑥ by dehumidification equipment, the fiber web after spraying is evenly heated and dehumidified;⑦ net laying machine is laid to the fiber web after dehumidification into certain thickness, and is sent into drying channel and is dried into shape;⑧ after drying and forming, it is sent to slitting winder to be sequentially slitted, wound and cut.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of glass fiber felt production, and particularly relates to a wet process for preparing low-density and high-elasticity glass fiber felt. BACKGROUND

[0002] Glass fiber felt is a roll-shaped product made by continuous or chopped strands being combined together in a random orientation by chemical binders or mechanical action. At present, the common glass fiber felt on the market is made by dry non-woven needle punching technology or wet chemical additive.

[0003] At present, the process for preparing glass fiber elastic felt by dry non-woven needle punching has the following problems: ① although the powder-like additive can be uniformly scattered on each piece of glass fiber web by a powder scattering machine, the powder-like additive is prone to sink under the action of gravity, so that the additive is less distributed on the top of the glass fiber felt and more distributed on the bottom, which finally affects the mechanical properties such as resilience and tensile strength of the glass fiber felt; ② when the powder-like additive is scattered by a scattering machine, dust pollution is easily caused, which is not conducive to the physical and mental health of workers on site.

[0004] At present, the process for preparing glass fiber elastic felt by wet non-woven needle punching has the following problems: ① after the glass fiber web is soaked with the solution containing the additive, the solution is prone to enrichment under the action of gravity, so that the additive is less distributed on the top of the glass fiber felt and more distributed on the bottom, which finally affects the mechanical properties such as resilience and tensile strength of the glass fiber felt; ② when the soaked glass fiber web is stacked together by a laying machine, if most of the solvent is not removed by a dehumidifying device first, but directly sent into the drying tunnel, the outer glass fiber web will be heated first and all the additive will be precipitated and entangled together, the inner glass fiber web will be heated later and part of the additive will be precipitated and entangled together, which finally affects the mechanical properties such as resilience and tensile strength of the glass fiber felt; ③ if the fiber web layer produced by the enterprise is light, if the solution containing the additive is attached by soaking, the bulk density of the fiber web layer will be increased too much, which is not easy to transport. SUMMARY

[0005] The present application aims to provide a wet process for preparing low-density and high-elasticity glass fiber felt to solve the above-mentioned defects in the prior art.

[0006] A wet process for preparing low-density and high-elasticity glass fiber felt, comprising the following steps:

[0007] Step 1: feeding the incoming glass fiber into an opener to be fully mixed, opened and de-ironed;

[0008] Step 2: After opening, the fibers are sent to a mixing box by a cotton blower, the mixing box evenly mixes the fibers, and then the fibers are sent to a feeder by a blower;

[0009] Step 3: The fibers are evenly spread on the feeding curtain of a carding machine by the feeder;

[0010] Step 4: The carding machine turns the spread fibers into a uniformly distributed fiber web through carding and sends it to a spraying device;

[0011] Step 5: The spraying device sprays the solution containing additives onto the fiber web and sends it to a dehumidifying device;

[0012] Step 6: The dehumidifying device uniformly heats and dehumidifies the sprayed fiber web, allowing the solvent on the fiber web to volatilize and the additives on the fiber web to be evenly precipitated;

[0013] Step 7: The lapper lays the dehumidified fiber web into a certain thickness and sends it into a drying channel for drying and forming;

[0014] Step 8: After drying and forming, it is sent to a slitting and winding machine for slitting, winding, and cutting;

[0015] Step 9: Randomly inspect the fiberglass felt prepared by the wet process: the resilience coefficient is >0.44, the density is <20 kg / m 3 , the tensile strength is >30 kPa, the glue content is <30%, and the thermal conductivity at 0°C is <0.04 W / (mK).

[0016] Preferably, in step 5, the solvent of the solution is an ethanol solution with an alcohol content of 50-60%, and the additive of the solution is a phenol-formaldehyde resin with a content of 88-90%, urotropine with a content of 7-9%, and free phenol with a content of 1-2%.

[0017] Preferably, in step 6, the internal dehumidifying temperature of the dehumidifying device is 75-85°C, and the dehumidifying time is 2-3 minutes.

[0018] Preferably, in step 7, the drying and forming temperature inside the drying channel is 195-225°C, and the drying time is 4-6 minutes.

[0019] Preferably, in step 6, the dehumidifying device includes a dehumidifying mechanism, a conveying mechanism, and a rolling mechanism, wherein,

[0020] The dehumidification mechanism comprises a dehumidification cylinder, an electric heating tube, a hydraulic cylinder, an end cover plate, a motor one, a rotating cylinder and rotating strips, wherein the hydraulic cylinder drives the end cover plate to open and close the port of the dehumidification cylinder; the electric heating tube heats the gas in the dehumidification cylinder, and the hot gas flow carries away the moisture on the glass fiber net; the motor one drives the rotating cylinder and the rotating strips to rotate and suck dry gas into the dehumidification cylinder and discharge humid gas out of the dehumidification cylinder.

[0021] The conveying mechanism is arranged on the inner side of the dehumidification cylinder and comprises a conveying belt and a motor two, which drives the conveying belt to move and input the sprayed glass fiber net into the dehumidification cylinder and output the dehumidified glass fiber net out of the dehumidification cylinder.

[0022] The rolling mechanism is arranged below the dehumidification cylinder and comprises a motor three, which drives the dehumidification cylinder and the glass fiber net in the cylinder to circulate and roll back and forth.

[0023] Preferably, the dehumidification cylinder is horizontally arranged front-to-back, a circle of air inlets is arranged in the middle of the dehumidification cylinder, a pair of upper and lower symmetrical heat preservation shells are connected to the outer side of the dehumidification cylinder, air vents are coaxially arranged on the heat preservation shells at each air inlet, a plurality of electric heating tubes are evenly inlaid on the inner wall of the heat preservation shell and the surface of the electric heating tube is attached to the outer wall of the dehumidification cylinder, two circles of friction belts are symmetrically pasted on the outer wall of the heat preservation shell, upper and lower symmetrical fixed plates are installed at the front and rear ends of the dehumidification cylinder, two pairs of hydraulic cylinders are correspondingly connected to each fixed plate, the hydraulic cylinders are vertically arranged inward and a pneumatic block is connected to the end of the piston rod of the hydraulic cylinder, an "L"-shaped pneumatic strip is connected to the pneumatic block, two pairs of end cover plates are symmetrically arranged on the front and rear sides of the dehumidification cylinder, the end cover plates are symmetrically arranged between each pair of end cover plates, the end cover plates are connected to the pneumatic strip, the inner edges of all the end cover plates are provided with inlets and outlets, and the rear end cover plate is further provided with a symmetrical dehumidification outlet, left and right symmetrical fixed boxes are installed at the front end of the dehumidification cylinder, two pairs of motors one are correspondingly installed on the upper and lower sides of the two fixed boxes, a friction wheel one is keyed connected to the output end of the motor one, the rotating cylinder is coaxially arranged in the dehumidification cylinder, a plurality of helical rotating strips are evenly welded on the outer wall of the rotating cylinder, a friction ring is coaxially fixed to the front end of the rotating cylinder, and the friction ring is frictionally abutted between the left and right friction wheels one.

[0024] Preferably, the side of the fixed plate is connected with a "Y" type support frame, the middle part of the support frame is rotationally connected with flexible conveying shafts, four electrostatic conveying belts are jointly connected between the front and rear conveying shafts, the left and right ends of the conveying shafts are both key-connected with friction wheels two, mounting sleeves are sleeved beside the friction wheels two, steel wires are connected between the mounting sleeves and the pneumatic blocks, the tips of the support frame are rotationally connected with fixed pulleys, the steel wires are wound on adjacent fixed pulleys, the pneumatic blocks are horizontally connected with elastic steel comb strips, the motor two is provided with a pair and is correspondingly installed in the middle of the two fixed boxes, the output end of the motor two is key-connected with a belt wheel one, the upper and lower edges of the fixed box are rotationally connected with a pair of mounting shafts one, the inner ends of the mounting shafts one are key-connected with belt wheels two, the belt wheel one and the belt wheels two on the two edges are connected through a belt one, the side surfaces of the belt wheels two are coaxially connected with friction wheels three, when the conveying shafts are in a straight state, the two ends of the friction wheels two correspondingly frictionally abut beside the friction wheels three on the two edges.

[0025] Preferably, the rolling mechanism further comprises a support plate, the support plate is horizontally arranged below the dehumidification cylinder, a pair of "N" type support seats are symmetrically installed on the upper side of the support plate, the middle part of the support seat is installed with a motor three, the output end of the motor three is key-connected with a belt wheel three, the two ends of the support seat are rotationally connected with a pair of mounting shafts two, the two ends of the mounting shafts two are respectively key-connected with a belt wheel four and a friction wheel four, the belt wheel three and the belt wheels four on the two edges are connected through a belt two, the belt two is constrained into an "N" type shape through two pairs of constraint tubes welded on the support seat, the friction wheels four on the same side frictionally abut on the lower side of the friction belt, the lower side of the support plate is connected with a support frame, support pads are uniformly connected on the bottom of the support frame, and support feet are vertically connected on each support pad.

[0026] Preferably, the end cover plate is provided, on the outer side of the inlet and outlet, with a sealing strip made of rubber material and having magnetism.

[0027] Preferably, the outer side of the end cover plate is symmetrically distributed with a pair of photoelectric sensors, the photoelectric sensors are vertically downwardly installed on the outer wall of the end cover plate through "L" type fixing sheets.

[0028] Compared with the prior art, the present application has the following advantages:

[0029] 1. The additive on the top of the glass fiber felt produced by the wet process in the present application is uniformly distributed, and there is no additive sinking or enrichment, which effectively ensures the mechanical properties such as resilience and tensile strength of the glass fiber felt, and is not easy to cause dust pollution, which is beneficial to the physical and mental health of workers on site.

[0030] 2、The dehumidification equipment in the application, when dehumidifying, through the contraction of the piston rods of the front and rear two pairs of hydraulic cylinders and the driving of the front and rear two pairs of end cover plates to close to the front and rear two ends of the dehumidification cylinder, at the same time, through the pulling of the corresponding steel wire ropes, the straight conveying shaft is bent into an arc shape, and the four pieces of wet glass fiber mesh circular array on the four conveying belts are in the inside of the dehumidification cylinder, so that the spacing of each piece of glass fiber mesh and the cylinder wall of the dehumidification cylinder is the same, thereby ensuring that the solution on each piece of glass fiber mesh is uniformly heated.

[0031] 3、The dehumidification equipment in the application, when dehumidifying, through the driving of the dehumidification cylinder and the glass fiber mesh in the cylinder by the front and rear two motors, the solution attached to each piece of glass fiber mesh will not be enriched at the lowest point position thereon due to the action of gravity, thereby ensuring that the solute distribution on each piece of glass fiber mesh is uniform. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 The process flow chart for producing glass fiber felt of the application.

[0033] Figure 2 The overall front three-dimensional structure schematic view of the application.

[0034] Figure 3 The overall rear three-dimensional structure schematic view of the application.

[0035] Figure 4 The structure schematic view of the dehumidification mechanism in the application.

[0036] Figure 5 The structure schematic view of the conveying mechanism in the application.

[0037] Figure 6 The structure schematic view of the conveying mechanism after explosion.

[0038] Figure 7 The structure schematic view of the rolling mechanism in the application.

[0039] Wherein:

[0040] 10 - dehumidification mechanism; 101 - dehumidification cylinder; 101a - air inlet; 102 - heat preservation shell; 102a - air permeable port; 103 - electric heating pipe; 104 - friction belt; 105 - fixed plate; 106 - hydraulic cylinder; 107 - pneumatic block; 108 - pneumatic strip; 109 - end cover plate; 109a - inlet and outlet; 109b - dehumidification port; 110 - fixed box; 111 - motor one; 112 - friction wheel one; 113 - rotating cylinder; 114 - rotating strip; 115 - friction ring; 116 - sealing strip; 117 - photoelectric sensor; 118 - fixed sheet;

[0041] 20 - conveying mechanism; 201 - support frame; 202 - conveying shaft; 203 - conveying belt; 204 - friction wheel two; 205 - mounting sleeve; 206 - steel wire rope; 207 - fixed pulley; 208 - steel comb; 209 - motor two; 210 - pulley one; 211 - mounting shaft one; 212 - pulley two; 213 - belt one; 214 - friction wheel three;

[0042] 30 - rolling mechanism; 301 - support plate; 302 - support seat; 303 - motor three; 304 - pulley three; 305 - mounting shaft two; 306 - pulley four; 307 - belt two; 308 - constraint tube; 309 - friction wheel four; 310 - support frame; 311 - support pad; 312 - support leg;

[0043] 40 - glass fiber web. DETAILED DESCRIPTION

[0044] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application will be further described below in conjunction with specific embodiments.

[0045] As shown in Figures 1 to 7 A wet process for preparing low-density, high-elasticity glass fiber felt includes the following steps:

[0046] Step 1: The incoming glass fibers are fed into an opener for thorough mixing, opening and iron removal;

[0047] Step 2: After opening, the fibers are sent to a mixing box by a cotton conveying fan, the mixing box evenly distributes the above-mentioned opened fibers, and then the fibers are conveyed to a feeder by a fan;

[0048] Step 3: The opened fibers are evenly laid on the feeding curtain of a carding machine by the feeder;

[0049] Step 4: The carding machine turns the above-mentioned laid fibers into a uniformly distributed fiber web through carding, and conveys the fiber web to a spraying device;

[0050] Step 5: The spraying device sprays the solution containing additives onto the fiber web, and conveys the fiber web to a dehumidifying device;

[0051] Step 6: The dehumidifying device uniformly heats and dehumidifies the sprayed fiber web, allowing the solvent on the fiber web to volatilize, and allowing the additives on the fiber web to be uniformly precipitated;

[0052] Step 7: The web laying machine lays the dehumidified fiber web into a certain thickness, and sends it into a drying channel for drying and forming;

[0053] Step 8: After drying and forming, it is sent into a slitting and winding machine for slitting, winding and cutting;

[0054] Step 9: Randomly check the glass fiber mat prepared by the wet process: the coefficient of resilience > 0.44, the density < 20 kg / m 3 , the tensile strength > 30 kPa, the glue content < 30%, the thermal conductivity at 0℃ < 0.04 W / (mK).

[0055] In this embodiment, in step 5, the solvent of the solution is: an ethanol solution with an alcohol content of 50-60%, and the additive of the solution is: phenol formaldehyde resin with a content of 88-90%, urotropine with a content of 7-9%, and free phenol with a content of 1-2%.

[0056] In this embodiment, in step 6, the internal dehumidification temperature of the dehumidification device is 75-85℃, and the dehumidification time is 2-3 minutes.

[0057] In this embodiment, in step 7, the drying and forming temperature inside the drying channel is 195-225℃, and the drying time is 4-6 minutes.

[0058] In this embodiment, in step 6, the dehumidification device includes a dehumidification mechanism 10, a conveying mechanism 20, and a rolling mechanism 30, wherein,

[0059] The dehumidification mechanism 10 includes a dehumidification cylinder 101, an electric heating pipe 103, a hydraulic cylinder 106, an end cover plate 109, a motor one 111, a rotating cylinder 113, and a rotating strip 114, wherein the end cover plate 109 is opened and closed at the port of the dehumidification cylinder 101 by the hydraulic cylinder 106; the gas inside the dehumidification cylinder 101 is heated by the electric heating pipe 103, and the hot gas flow carries away the moisture on the glass fiber web 40; the rotating cylinder 113 and the rotating strip 114 are rotated by the motor one 111 to suck dry gas into the dehumidification cylinder 101 and exhaust humid gas out of the dehumidification cylinder 101;

[0060] The conveying mechanism 20 is arranged inside the dehumidification cylinder 101 and includes a conveying belt 203 and a motor two 209, which drives the conveying belt 203 to move and input the sprayed glass fiber web 40 into the dehumidification cylinder 101 and output the dehumidified glass fiber web 40 out of the dehumidification cylinder 101;

[0061] The rolling mechanism 30 is arranged below the dehumidification cylinder 101 and includes a motor three 303, which drives the dehumidification cylinder 101 and the glass fiber web 40 inside the cylinder to circulate and roll back and forth.

[0062] In the embodiment, the dehumidification cylinder 101 is horizontally and front-back oriented, the middle part of the dehumidification cylinder 101 is provided with a ring of air inlets 101a, the outer side of the dehumidification cylinder 101 is connected with a pair of upper and lower symmetrically distributed heat preservation shells 102, the heat preservation shell 102 is coaxially provided with a gas permeable port 102a at each air inlet 101a, the electric heating tube 103 is provided with several and evenly inlaid on the inner wall of the heat preservation shell 102, and the surface of the electric heating tube 103 is attached to the outer wall of the dehumidification cylinder 101, the outer wall of the heat preservation shell 102 is symmetrically pasted with two rings of friction belts 104, the front and rear ends of the dehumidification cylinder 101 are both mounted with upper and lower symmetrically distributed fixed plates 105, the hydraulic cylinders 106 are provided with two pairs and correspondingly connected to each fixed plate 105, the hydraulic cylinder 106 is vertically inwardly arranged and connected with a pneumatic block 107 at the end of the piston rod, the pneumatic block 107 is connected with an "L"-shaped pneumatic strip 108, the end cover plate 109 is provided with two pairs and symmetrically distributed on the front and rear sides of the dehumidification cylinder 101, each pair of end cover plates 109 is symmetrically distributed upward and downward, and the end cover plate 109 is connected to the pneumatic strip 108, the inner edges of all the end cover plates 109 are provided with inlets and outlets 109a, and the rear end cover plate 109 is also symmetrically provided with a dehumidification port 109b, the front end of the dehumidification cylinder 101 is mounted with left and right symmetrically distributed fixed boxes 110, the electric machines 111 are provided with two pairs and correspondingly mounted on the upper and lower edges of the two fixed boxes 110, the output ends of the electric machines 111 are all key-connected with friction wheels 112, the rotating cylinder 113 is coaxially arranged in the inside of the dehumidification cylinder 101, and a plurality of helical rotating strips 114 are evenly welded on the outer wall of the rotating cylinder 113, the front end of the rotating cylinder 113 is coaxially fixed with a friction ring 115, and the friction ring 115 is frictionally abutted between the left and right friction wheels 112.

[0063] In the embodiment, the side of the fixed plate 105 is connected with a "Y" type support frame 201, the middle part of the support frame 201 is rotationally connected with flexible conveying shafts 202, four electrostatic conveying belts 203 are jointly connected between the front and rear two pairs of conveying shafts 202, the left and right ends of the conveying shafts 202 are both key-connected with friction wheels two 204, mounting sleeves 205 are sleeved beside the friction wheels two 204, steel wires 206 are connected between the mounting sleeves 205 and the pneumatic blocks 107, the tips of the support frame 201 are rotationally connected with fixed pulleys 207, the steel wires 206 are wound on the adjacent fixed pulleys 207, the pneumatic blocks 107 are horizontally connected with elastic steel comb strips 208, the motor two 209 is provided with a pair and is correspondingly installed in the middle of the two fixed boxes 110, the output end of the motor two 209 is key-connected with a belt wheel one 210, the upper and lower edges of the fixed box 110 are rotationally connected with a pair of mounting shafts one 211, the inner ends of the mounting shafts one 211 are key-connected with belt wheels two 212, the belt wheel one 210 and the two belt wheels two 212 are connected through a belt one 213, the side surfaces of the belt wheels two 212 are coaxially connected with friction wheels three 214, when the conveying shafts 202 are in a straight state, the two ends of the friction wheels two 204 correspondingly frictionally abut beside the two friction wheels three 214.

[0064] In the embodiment, the rolling mechanism 30 further comprises a support plate 301, the support plate 301 is horizontally arranged below the dehumidification cylinder 101, a pair of "N" type support seats 302 are symmetrically installed on the upper side of the support plate 301, a motor three 303 is installed in the middle of the support seat 302, a belt wheel three 304 is key-connected to the output end of the motor three 303, a pair of mounting shafts two 305 are rotationally connected to the two ends of the support seat 302, a belt wheel four 306 and a friction wheel four 309 are respectively key-connected to the two ends of the mounting shafts two 305, the belt wheel three 304 and the two belt wheels four 306 are connected through a belt two 307, the belt two 307 is constrained into an "N" type shape through two pairs of constraint tubes 308 welded on the support seat 302, the two friction wheel fours 309 on the same side frictionally abut on the lower side of the friction belt 104, the lower side of the support plate 301 is connected with a support frame 310, support pads 311 are uniformly connected to the bottom of the support frame 310, and support feet 312 are vertically connected to each support pad 311.

[0065] In the embodiment, the end cover plate 109 is provided with a sealing strip 116 made of rubber material and having magnetism outside the inlet and outlet 109a. The sealing strips 116 magnetically attracted together can temporarily block the inlet and outlet 109a on the end cover plate 109, which can not only avoid the dry hot airflow from leaking out of the front inlet and outlet 109a, but also avoid the humid hot airflow from leaking out of the rear inlet and outlet 109a.

[0066] In this embodiment, the outer side of the end cover plate 109 is symmetrically distributed with a pair of photoelectric sensors 117, which are installed vertically downward on the outer wall of the end cover plate 109 through the "L" type fixing sheet 118. The measurement of the distance to the ground by each pair of photoelectric sensors 117 can be used to determine whether the dehumidification mechanism 10 rolls to the predetermined space angle. When the measurement results of the two photoelectric sensors 117 are consistent, it can be determined that the dehumidification mechanism 10 has rolled to the predetermined angle.

[0067] The working principle of the dehumidification equipment used in the wet process for preparing low-density and high-elasticity glass fiber felt is as follows:

[0068] Step 1: The piston rods of the front and rear pairs of hydraulic cylinders 106 are retracted to drive the front and rear pairs of end cover plates 109 to close to the front and rear ends of the dehumidification cylinder 101, and then the electric heating pipe 103 is used to heat the cylinder body of the dehumidification cylinder 101 and the gas in the cylinder;

[0069] Step 2: The piston rods of the front and rear pairs of hydraulic cylinders 106 are extended to drive the front and rear pairs of end cover plates 109 to open to the front and rear ends of the dehumidification cylinder 101, and then the left and right two motors 209 drive the upper and lower two layers of conveying belts 203 to move backward, conveying the sprayed two pieces of glass fiber web 40 backward and electrostatically adsorbing them on the upper side of the lower two conveying belts 203, and at the same time, conveying the sprayed two pieces of glass fiber web 40 backward and electrostatically adsorbing them on the lower side of the upper two conveying belts 203;

[0070] Step 3: The piston rods of the front and rear pairs of hydraulic cylinders 106 are retracted to drive the front and rear pairs of end cover plates 109 to close to the front and rear ends of the dehumidification cylinder 101, and at the same time, the straight conveying shaft 202 is bent into a circular arc shape through the pulling of the corresponding steel wire ropes 206, and the four pieces of wet glass fiber web 40 on the four conveying belts 203 are circularly arrayed in the interior of the dehumidification cylinder 101, so that the distance between each piece of glass fiber web 40 and the cylinder wall of the dehumidification cylinder 101 is the same, thereby ensuring that the solution on each piece of glass fiber web 40 is uniformly heated;

[0071] Step 4: The left and right two motors I 111 drive the rotating cylinder 113 and the rotating strips 114 thereon to rotate slowly and uniformly through the friction transmission of the friction wheel I 112-friction ring 115, and dry air is sucked into the dehumidification cylinder 101 from back to front through the air inlet 101a and the air vent 102a, the dry air exchanges heat with the hot cylinder wall of the dehumidification cylinder 101, the dry air is heated and then blown from front to back to the surrounded glass fiber web 40, the dry and hot air exchanges heat with the wet glass fiber web 40, gradually carrying away the solvent on the glass fiber web 40, and gradually precipitating the solute in the solvent, and the generated hot and humid gas is discharged from the dehumidification cylinder 101 through the dehumidification port 109b;

[0072] Step 5: When dehumidifying, the dehumidifying cylinder 101 and the glass fiber mesh 40 in the cylinder are circulated and rolled back and forth by the front and rear motors three 303, so that the solution attached to each glass fiber mesh 40 will not be enriched at the lowest point position due to gravity, thereby ensuring uniform distribution of solute on each glass fiber mesh 40;

[0073] Step 6: After dehumidification, the front and rear pairs of hydraulic cylinders 106 are extended by the piston rods and drive the front and rear pairs of end cover plates 109 to open at the front and rear ends of the dehumidifying cylinder 101, and then the left and right two motors two 209 drive the upper and lower two layers of conveyor belts 203 to move backward, and the two glass fiber meshes 40 in the upper and lower two layers are transported out of the dehumidifying cylinder 101.

[0074] Therefore, the above disclosed embodiments are only examples in all aspects, and are not the only ones. All changes within the scope of the present application or within the scope equivalent to the present application are included in the present application.

Claims

1. A wet process for preparing low-density, high-elasticity fiberglass mat, comprising the following steps: Step 1: Feed the incoming glass fiber into the fiber opener for thorough mixing, opening, and iron removal; Step 2: After opening, the cotton is sent to the mixing box by the cotton conveying fan. The mixing box evenly mixes the opened fibers and then the cotton is conveyed to the cotton feeder by the fan. Step 3: The opened fibers are evenly spread on the feed curtain of the carding machine using a cotton feeder; Step 4: The carding machine combs the spread-out fibers into a uniformly distributed fiber web and conveys it to the spraying device; Step 5: The solution containing the additive is thoroughly sprayed onto the fiber web using a spraying device and then conveyed to a dehumidification device; Step 6: Use a dehumidifier to uniformly heat and dehumidify the sprayed fiber web, allowing the solvent on the fiber web to evaporate and the additives on the fiber web to precipitate out evenly. Step 7: The web laying machine lays the dehumidified fiber web to a certain thickness and sends it into the drying tunnel for drying and shaping; Step 8: After drying and forming, the strip is fed into a slitting and winding machine for slitting, winding and cutting in sequence; Step 9: Randomly sample the fiberglass mats prepared by the wet process: resilience coefficient > 0.44, density < 20 kg / m³ 3 Tensile strength >30kPa, adhesive content <30%, thermal conductivity at 0℃ <0.04W / (mK); The feature is that, in step 6, the dehumidification device includes a dehumidification mechanism (10), a conveying mechanism (20), and a rolling mechanism (30), wherein, The dehumidification mechanism (10) includes a dehumidification cylinder (101), an electric heating tube (103), a hydraulic cylinder (106), an end cover plate (109), a motor (111), a rotating cylinder (113), and a rotating bar (114). The hydraulic cylinder (106) drives the end cover plate (109) to open and close at the port of the dehumidification cylinder (101). The electric heating tube (103) heats the gas inside the dehumidification cylinder (101) and allows the hot air to carry away the moisture on the glass fiber mesh (40). The motor (111) drives the rotating cylinder (113) and the rotating bar (114) to rotate and draw dry gas into the dehumidification cylinder (101) and discharge moist gas from the dehumidification cylinder (101). The conveying mechanism (20) is located inside the dehumidification cylinder (101) and includes a conveyor belt (203) and a second motor (209). The second motor (209) drives the conveyor belt (203) to move and inputs the sprayed glass fiber mesh (40) into the dehumidification cylinder (101) and outputs the dehumidified glass fiber mesh (40) out of the dehumidification cylinder (101). The rolling mechanism (30) is located below the dehumidification cylinder (101) and includes a motor (303). The motor (303) drives the dehumidification cylinder (101) and the glass fiber mesh (40) inside the cylinder to roll back and forth in a cycle. The dehumidifier cylinder (101) is horizontally oriented with its front and back facing each other. A ring of air inlets (101a) is located in the center of the dehumidifier cylinder (101). A pair of symmetrically distributed insulation shells (102) are connected to the outer side of the dehumidifier cylinder (101). Each insulation shell (102) has a coaxial vent (102a) at each air inlet (101a). Several heating elements (103) are evenly embedded in the inner wall of the insulation shell (102), and the surface of the heating elements (103) is attached to the dehumidifier cylinder. On the outer wall of (101), two rings of friction strips (104) are symmetrically pasted on the outer wall of the insulation shell (102). The front and rear ends of the dehumidification cylinder (101) are equipped with symmetrical upper and lower fixing plates (105). The hydraulic cylinder (106) is provided in two pairs and is correspondingly connected to each fixing plate (105). The hydraulic cylinder (106) is set vertically inward and a pneumatic block (107) is connected to the end of its piston rod. An "L"-shaped pneumatic strip (108) is connected to the pneumatic block (107). Two pairs of end covers (109) are symmetrically distributed on the front and rear sides of the dehumidification cylinder (101). Each pair of end covers (109) is symmetrically distributed vertically and connected to the pneumatic strip (108). All end covers (109) have inlets and outlets (109a) on their inner edges, and the rear end cover (109) is also symmetrically provided with exhaust ports (109b). The front end of the dehumidification cylinder (101) is equipped with symmetrically arranged fixing boxes (110). The motor (111) is equipped with... There are two pairs of friction wheels (112) installed on the upper and lower sides of the two fixed boxes (110). The output end of the motor (111) is keyed to the friction wheel (112). The rotating cylinder (113) is coaxially located inside the dehumidifying cylinder (101), and several spiral rotating strips (114) are evenly welded on the outer wall of the rotating cylinder (113). The front end of the rotating cylinder (113) is coaxially fixed with a friction ring (115), and the friction ring (115) rubs against the friction wheel (112) on the left and right sides.

2. The wet process for preparing low-density, high-elasticity fiberglass mat according to claim 1, characterized in that: In step 5, the solvent of the solution is an ethanol solution with an alcohol content of 50-60%, and the additives of the solution are phenolic resin with a content of 88-90%, hexamethylenetetramine with a content of 7-9%, and free phenol with a content of 1-2%.

3. The wet process for preparing low-density, high-elasticity fiberglass mat according to claim 2, characterized in that: In step 6, the internal dehumidification temperature of the dehumidification device is 75-85℃, and the dehumidification time is 2-3 minutes.

4. The wet process for preparing low-density, high-elasticity fiberglass mat according to claim 1, characterized in that: In step 7, the drying and forming temperature inside the drying tunnel is 195-225℃, and the drying time is 4-6 minutes.

5. The wet process for preparing low-density, high-elasticity fiberglass mat according to claim 1, characterized in that: A Y-shaped support frame (201) is connected to the side of the fixed plate (105). A flexible conveyor shaft (202) is rotatably connected to the middle of the support frame (201), and four electrostatic conveyor belts (203) are connected between the two pairs of conveyor shafts (202). Friction wheels (204) are keyed to both ends of the conveyor shafts (202), and mounting sleeves (205) are fitted on the sides of the friction wheels (204). A steel wire rope (206) is connected between the mounting sleeve (205) and the pneumatic block (107). A fixed pulley (207) is rotatably connected to the tip of the support frame (201), and the steel wire rope (206) is wound around the adjacent fixed pulley (207). A horizontally connected... The elastic steel comb (208) is provided with a pair of motors (209) and is installed in the middle of two fixed boxes (110). The output end of the motor (209) is keyed to pulley (210). The upper and lower sides of the fixed box (110) are rotatably connected to a pair of mounting shafts (211), and the inner end of the mounting shafts (211) is keyed to pulley (212). The pulley (210) and the two pulleys (212) are connected by belt (213). The side of the pulley (212) is coaxially connected to friction wheel (214). When the conveying shaft (202) is in a straight state, the friction wheels (204) at both ends of the shaft are rubbed against the sides of the friction wheels (214).

6. The wet process for preparing low-density, high-elasticity fiberglass mat according to claim 1, characterized in that: The rolling mechanism (30) also includes a support plate (301), which is horizontally positioned below the dehumidifying cylinder (101). A pair of U-shaped support seats (302) are symmetrically installed on the upper side of the support plate (301). A motor (303) is mounted in the middle of the support seat (302), and a pulley (304) is keyed to the output end of the motor (303). A pair of mounting shafts (305) are rotatably connected to both ends of the support seat (302), and pulleys (306) and friction wheels (4) are keyed to both ends of the mounting shafts (305). 309), the pulley three (304) is connected to the pulley four (306) on both sides by belt two (307). The belt two (307) is constrained into a "U" shape by two pairs of constraint tubes (308) welded to the support base (302). A pair of friction wheels four (309) on the same side rub against the lower side of the friction belt (104). The lower side of the support plate (301) is connected to a support frame (310), and support pads (311) are evenly connected to the bottom of the support frame (310). Each support pad (311) is vertically connected to a support foot (312).

7. The wet process for preparing low-density, high-elasticity fiberglass mat according to claim 1, characterized in that: The end cover plate (109) is fitted with a rubber and magnetic sealing strip (116) on the outside of the inlet and outlet (109a).

8. The wet process for preparing low-density, high-elasticity fiberglass mat according to claim 1, characterized in that: A pair of photoelectric sensors (117) are symmetrically distributed on the outer side of the end cover plate (109). The photoelectric sensors (117) are vertically mounted on the outer wall of the end cover plate (109) by an "L"-shaped fixing piece (118).

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