CN114835966B - Ultralow-frequency soundproof cotton, production process thereof and production detection device - Google Patents
Ultralow-frequency soundproof cotton, production process thereof and production detection device Download PDFInfo
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- CN114835966B CN114835966B CN202210619696.0A CN202210619696A CN114835966B CN 114835966 B CN114835966 B CN 114835966B CN 202210619696 A CN202210619696 A CN 202210619696A CN 114835966 B CN114835966 B CN 114835966B
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- 229920000742 Cotton Polymers 0.000 title claims abstract description 94
- 238000001514 detection method Methods 0.000 title claims description 59
- 238000004519 manufacturing process Methods 0.000 title claims description 28
- 238000009413 insulation Methods 0.000 claims abstract description 26
- 230000007246 mechanism Effects 0.000 claims description 102
- 238000007789 sealing Methods 0.000 claims description 66
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 abstract description 35
- 229920005989 resin Polymers 0.000 abstract description 26
- 239000011347 resin Substances 0.000 abstract description 26
- 229920001971 elastomer Polymers 0.000 abstract description 20
- 239000004698 Polyethylene Substances 0.000 abstract description 18
- -1 polyethylene Polymers 0.000 abstract description 18
- 229920000573 polyethylene Polymers 0.000 abstract description 18
- 244000043261 Hevea brasiliensis Species 0.000 abstract description 17
- 229920003052 natural elastomer Polymers 0.000 abstract description 17
- 229920001194 natural rubber Polymers 0.000 abstract description 17
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 16
- 239000011575 calcium Substances 0.000 abstract description 16
- 229910052791 calcium Inorganic materials 0.000 abstract description 16
- 239000002952 polymeric resin Substances 0.000 abstract description 15
- 229920003002 synthetic resin Polymers 0.000 abstract description 15
- 239000004014 plasticizer Substances 0.000 abstract description 13
- 239000006229 carbon black Substances 0.000 abstract description 11
- IHBCFWWEZXPPLG-UHFFFAOYSA-N [Ca].[Zn] Chemical compound [Ca].[Zn] IHBCFWWEZXPPLG-UHFFFAOYSA-N 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 10
- 239000003381 stabilizer Substances 0.000 abstract description 10
- 239000003795 chemical substances by application Substances 0.000 abstract description 9
- 230000002708 enhancing effect Effects 0.000 abstract description 4
- 229920000642 polymer Polymers 0.000 abstract description 4
- 238000013016 damping Methods 0.000 abstract description 3
- 239000000945 filler Substances 0.000 abstract description 3
- 239000011810 insulating material Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 35
- 238000003756 stirring Methods 0.000 description 32
- 238000006243 chemical reaction Methods 0.000 description 21
- 238000007493 shaping process Methods 0.000 description 16
- 238000002156 mixing Methods 0.000 description 11
- 239000000654 additive Substances 0.000 description 10
- 230000000996 additive effect Effects 0.000 description 10
- 238000001816 cooling Methods 0.000 description 10
- 238000005303 weighing Methods 0.000 description 10
- 238000005266 casting Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 239000012774 insulation material Substances 0.000 description 6
- 238000004026 adhesive bonding Methods 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000009958 sewing Methods 0.000 description 5
- 238000007873 sieving Methods 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000001739 density measurement Methods 0.000 description 1
- 238000007542 hardness measurement Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H3/00—Measuring characteristics of vibrations by using a detector in a fluid
- G01H3/04—Frequency
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
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- Chemical & Material Sciences (AREA)
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- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
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- Acoustics & Sound (AREA)
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Abstract
The invention discloses an ultralow frequency soundproof cotton which comprises the following components in parts by weight: 15-45 parts of polyethylene high polymer resin powder, 15-45 parts of natural rubber resin, 40-60 parts of calcium powder, 20-30 parts of plasticizer, 2-6 parts of high temperature agent, 1-3 parts of calcium-zinc stabilizer and 0.1-1.3 parts of carbon black, wherein the diameters of the polyethylene high polymer resin powder and the natural rubber resin are more than 2200 meshes. The invention finely adjusts the mesh number of the filler from the original 300 meshes to 1200 meshes, and leads the density of the rubber to be 1.7+/-0.2 g/cm 3 Adjust to 1.9 plus or minus 0.2g/cm 3 The sound insulation capability of the rubber is enhanced, and the molecular content and the molecular space of unit area are increased between the modified resin and the high polymer substanceThe noise-blocking capability of the sound-insulating material is enhanced, the hardness of the rubber is reduced to 75+/-10A from the original Shore 85+/-10A by reducing the hardness of the rubber, the plasticizer consumption is increased by about 10%, the damping capability of the rubber is increased, and the noise is better absorbed, so that the effect of enhancing the sound insulation is achieved.
Description
Technical Field
The invention relates to the technical field, in particular to ultralow frequency soundproof cotton, a production process thereof and a production detection device.
Background
In order to protect the environment, the main manufacturers of household appliances such as household air conditioners, washing machines, refrigerators, ovens and the like gradually reduce the working noise of compressors, motors and heating/condensing devices, and a low-frequency or ultralow-frequency noise environment is formed, wherein the noise is below 500 dB, but people can be in the low-frequency or ultralow-frequency noise environment for a long time, and health injury is caused.
The noise control of the noise insulation materials in the current market is focused on the noise control with the frequency of more than 500 dB, and the noise control of the low-frequency wave band is still blank. There is an urgent need for a sound insulation material that can block noise above 500 db while also effectively blocking noise in the ultra-low band of 20-100 db.
Therefore, an ultralow frequency soundproof cotton, a production process and a production detection device thereof are provided.
Disclosure of Invention
The invention aims to provide an ultralow frequency soundproof cotton, a production process and a production detection device thereof, so as to solve the problem that the noise control of the low frequency wave band is blank when the noise control of the existing soundproof material on the market is focused on the noise control of more than 500 dB in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: an ultralow-frequency soundproof cotton comprises the following components in parts by weight: 15-45 parts of polyethylene high polymer resin powder, 15-45 parts of natural rubber resin, 40-60 parts of calcium powder, 20-30 parts of plasticizer, 2-6 parts of high temperature agent, 1-3 parts of calcium-zinc stabilizer and 0.1-1.3 parts of carbon black.
Preferably, the diameter mesh number of the polyethylene high molecular resin powder and the natural rubber resin is more than 2200 mesh.
Preferably, the calcium powder is fine calcium carbonate with a diameter of 300 meshes or more.
Preferably, the carbon black is required to be removed at high temperatures.
The production process of the ultra-low frequency soundproof cotton specifically comprises the following steps:
s1: weighing, sieving polyethylene high polymer resin powder, natural rubber resin and calcium powder in sequence to ensure that the size of the additive meets the production standard, and weighing the corresponding parts of additive for later use;
s2, mixing, namely adding polyethylene high polymer resin powder, natural rubber resin, calcium powder, a plasticizer, a high temperature agent, a calcium-zinc stabilizer and carbon black into a stirring kettle, and mixing and stirring to prepare a mixed material;
s3, banburying, namely adding the mixed material prepared in the step S2 into an internal mixer to carry out banburying, wherein the banburying temperature is 160-200 ℃, the initial banburying time is 30-45min, and then carrying out mixing for 5-15min after each time of adding the mixed material, so as to obtain a mixed material;
s4, shaping, namely putting the mixed materials in the step S3 into an extruder for hot melting plasticization, extruding the mixed materials into a die, and cooling and shaping the mixed materials to obtain blanks;
s5, forming, namely, carrying out roll casting forming on the blank obtained in the step S4 by a roll casting machine to obtain the soundproof cotton felt;
s6, blanking, namely cooling the soundproof cotton felt obtained in the step S5 to normal temperature, and blanking by a blanking machine;
s7, shaping, sewing the blanked soundproof cotton felt, and gluing the surface of the soundproof cotton felt to prepare the ultralow frequency soundproof cotton.
Preferably, in the step S2, the polyethylene high molecular resin powder, the natural rubber resin and the calcium powder are added into a reaction kettle for stirring for 5-15min, the stirring speed in the stirring kettle is controlled to be 400-600r/min, then the plasticizer, the high temperature agent and the calcium-zinc stabilizer are added into the reaction kettle for stirring for 5-15min, and then the carbon black is added into the reaction kettle for stirring for 2-6min, and the stirring speed of the reaction kettle is controlled to be 800-1000r/min.
Preferably, in the step S4, the blank is cooled to 40-60 degrees in a die for shaping.
Preferably, the thickness of the soundproof cotton felt formed by the roll casting in the step S5 is 2.0-3.0cm.
The production detection device for the ultralow frequency soundproof cotton comprises a soundproof room for closed detection, wherein a first noise source mechanism and a second noise source mechanism are fixedly arranged in parallel in the soundproof room, the first noise source mechanism comprises a sealing box, two guide grooves which are mutually parallel are formed in two sides of the top of the sealing box, supporting components are arranged at four corners in the first noise source mechanism, a fixing plate is fixedly arranged above the supporting components, a noise component is fixedly arranged at the center of the upper part of the fixing plate, and a positioning mechanism is movably arranged above the first noise source mechanism;
the positioning mechanism comprises a positioning frame matched with the sealing box, an electric sliding rail matched with the guide groove is fixedly arranged at the bottom of the positioning frame, the positioning frame is in sliding connection with the sealing box through the electric sliding rail, the positioning frame is in a hollowed-out arrangement, a placement notch for placing the sound insulation cotton felt is formed in the positioning frame, and a fixing frame matched with the positioning frame is hinged above the positioning frame;
the bottom of the fixed frame is fixedly connected with a first sealing ring and a second sealing ring at positions corresponding to the placement gaps, the first sealing ring is sleeved on the inner side of the second sealing ring, a certain distance is arranged between the first sealing ring and the second sealing ring, a positioning ring groove is formed in the bottom of the fixed frame by the first sealing ring and the second sealing ring, a plurality of positioning components are uniformly and fixedly arranged in the positioning ring groove at equal intervals, and a detection mechanism is arranged above the fixed frame;
the detection mechanism comprises a sealing shell fixedly mounted on the fixed frame, and a frequency sensor and a decibel sensor are fixedly mounted at the top end inside the sealing shell.
Preferably, the supporting component comprises a threaded rod rotationally connected with the sealing box, a threaded cylinder is connected above the threaded rod in a threaded manner, a driven gear is fixedly connected to the bottom of the threaded rod, and a transmission chain is arranged in the sealing box and is connected with the driven gears in the supporting components;
the positioning assembly comprises a spring, a positioning disc matched with the positioning ring groove is arranged at the bottom of the spring, and two ends of the spring are fixedly connected with the fixed frame and the positioning disc respectively
Compared with the prior art, the invention has the beneficial effects that:
1. the invention finely adjusts the mesh number of the filler from the original 300 meshes to 1200 meshes, and leads the density of the rubber to be 1.7+/-0.2 g/cm 3 Adjust to 1.9 plus or minus 0.2g/cm 3 The sound insulation capability of the rubber is enhanced, so that the molecular content and the structural force among molecules in unit area are increased in the modified resin and the high polymer substance, and the noise blocking capability of the sound insulation material is enhanced;
2. according to the invention, the hardness of the rubber is reduced, the consumption of the plasticizer is increased by about 10%, the hardness of the rubber is reduced from the original Shore 85+/-10A to 75+/-10A, the damping capacity of the rubber is increased, and the noise is better absorbed, so that the effect of enhancing sound insulation is achieved;
3. according to the invention, the frequency sensor and the decibel sensor in the sealed shell are used for detecting the decibel and the frequency of the noise emitted by the interior of the sealed box, the sealed shell is electrically connected with the computer detection terminal in actual use, and the frequency sensor is connected with the computer detection terminal, so that the convenience of data acquisition and storage is realized, the most direct data can be obtained directly, the application on a production line is facilitated, and the automation and specialization of the device are improved.
4. According to the invention, the first noise source mechanism and the second noise source mechanism are arranged in the soundproof room, the height difference of noise components in the first noise source mechanism and the second noise source mechanism is arranged, so that the noise sources at different distances can be conveniently measured, the difference in soundproof effect generated by the soundproof cotton felt is further accurate and reliable, in addition, when the noise tests on the two sides of the soundproof cotton felt are carried out, the tops of the first noise source mechanism and the second noise source mechanism are sealed, and furthermore, the interference of external noise on the detection result can be prevented through the arrangement of the soundproof room, so that the detection result is more accurate;
5. in the invention, when the sound insulation cotton felt is positioned, the first sealing ring and the second sealing ring are tightly attached to the sound insulation cotton felt, and meanwhile, the first sealing ring and the second sealing ring are in a compressed state.
Drawings
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a schematic diagram of the overall structure of the present invention;
FIG. 3 is an overall cross-sectional view of the present invention;
FIG. 4 is an exploded view of the connection structure of the first noise source mechanism, the positioning mechanism and the detection mechanism of the present invention;
FIG. 5 is a bottom view of the connecting structure of the positioning frame and the fixing frame of the present invention;
FIG. 6 is a cross-sectional view of the connection structure of the support assembly and the seal box of the present invention;
fig. 7 is an enlarged view of fig. 5 a in accordance with the present invention.
In the figure:
1. a sound insulation house; 11. an opening; 12. a soundproof door; 13. a bracket;
2. a first noise source mechanism; 21. a seal box; 22. a guide groove; 23. a fixing plate; 24. a noise assembly; 25. a support assembly; 251. a threaded rod; 252. a thread cylinder; 253. a driven gear; 254. a drive chain;
3. a second noise source mechanism;
4. a positioning mechanism; 41. a positioning frame; 42. an electric slide rail; 43. placing the notch; 44. a fixed frame; 441. a first seal ring; 442. a second seal ring; 443. positioning ring grooves; 444. a spring; 445. a positioning plate;
5. a detection mechanism; 51. a sealed housing; 52. a decibel sensor; 53. a frequency sensor.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
An ultralow frequency soundproof cotton, which is characterized in that: comprises the following components in parts by weight: 15-45 parts of polyethylene high polymer resin powder, 15-45 parts of natural rubber resin, 40-60 parts of calcium powder, 20-30 parts of plasticizer, 2-6 parts of high temperature agent, 1-3 parts of calcium-zinc stabilizer and 0.1-1.3 parts of carbon black.
Preferably, the diameter mesh number of the polyethylene high molecular resin powder and the natural rubber resin is more than 2200 mesh.
Preferably, the calcium powder is fine calcium carbonate with a diameter of 300 meshes or more.
Preferably, the carbon black is desulfurized at a high temperature.
The invention mainly develops a brand new formula of the resin rubber sound insulation layer, and the structural force and strength between the resin powder in the rubber are increased and the density (2.5+/-0.2 g/cm) of the sound insulation layer rubber is enhanced through the medium modified polyethylene high polymer resin powder and the enhanced plasticizer 3 ) Hardness (Shore hardness 80+ -10A), physical properties (tensile strength of more than 5MPa, elongation of more than 400%);
in summary, the formula of the invention increases the molecular content of unit area and the structural force between molecules by utilizing the modified resin and the high polymer substance, thereby enhancing the noise blocking capability of the sound insulation material.
Referring to fig. 1, the present invention provides a production process of a low-frequency soundproof cotton, which specifically includes the following steps:
s1: weighing, sieving polyethylene high polymer resin powder, natural rubber resin and calcium powder in sequence to ensure that the size of the additive meets the production standard, and weighing the corresponding parts of additive for later use;
s2, mixing, namely adding polyethylene high polymer resin powder, natural rubber resin and calcium powder into a reaction kettle, stirring for 5-15min, controlling the stirring rotation speed in the stirring kettle to be 400-600r/min, adding a plasticizer, a high temperature agent and a calcium-zinc stabilizer into the reaction kettle, stirring for 5-15min, adding carbon black into the reaction kettle, stirring for 2-6min, and controlling the stirring rotation speed of the reaction kettle to be 800-1000r/min;
s3, banburying, namely adding the mixed material prepared in the step S2 into an internal mixer to carry out banburying, wherein the banburying temperature is 160-200 ℃, the initial banburying time is 30-45min, and then carrying out mixing for 5-15min after each time of adding the mixed material, so as to obtain a mixed material;
s4, shaping, namely putting the mixed material in the step S3 into an extruder for hot melting plasticization, extruding the mixed material into a die, and cooling the extruded mixed material to 40-60 degrees for shaping to obtain a blank;
s5, forming, namely, carrying out roll forming on the blank obtained in the step S4 by a roll calender to obtain the soundproof cotton felt with the thickness of 2.0-3.0 cm;
s6, blanking, namely cooling the soundproof cotton felt obtained in the step S5 to normal temperature, and blanking by a blanking machine;
s7, shaping, sewing the blanked soundproof cotton felt, and gluing the surface of the soundproof cotton felt to prepare the ultralow frequency soundproof cotton.
In the invention, three experimental materials with the same quality, material quality and quantity are prepared in advance, three ultralow frequency soundproof cotton under different production condition environments are prepared, and quality inspection is carried out to obtain the preparation process of the optimal solution.
Example 1:
a production process of ultra-low frequency soundproof cotton is characterized in that: the method specifically comprises the following steps:
s1: weighing, sieving polyethylene high polymer resin powder, natural rubber resin and calcium powder in sequence to ensure that the size of the additive meets the production standard, and weighing the corresponding parts of additive for later use;
s2, mixing, namely adding polyethylene high polymer resin powder, natural rubber resin and calcium powder into a reaction kettle, stirring for 5min, controlling the stirring rotation speed in the stirring kettle to be 400r/min, adding a plasticizer, a high-temperature agent and a calcium-zinc stabilizer into the reaction kettle, stirring for 5min, adding carbon black into the reaction kettle, stirring for 2min, and controlling the stirring rotation speed of the reaction kettle to be 800r/min;
s3, banburying, namely adding the mixed material prepared in the step S2 into an internal mixer to carry out banburying, wherein the banburying temperature is 160 ℃, the initial banburying time is 30min, and then carrying out mixing for 5min after each time of adding the mixed material, so as to obtain a mixed material;
s4, shaping, namely putting the mixed materials in the step S3 into an extruder for hot melting plasticization, extruding the mixed materials into a die, and cooling the extruded mixed materials to 40 degrees for shaping to obtain blanks;
s5, forming, namely, carrying out roll casting forming on the blank obtained in the step S4 by a roll casting machine to obtain the sound insulation cotton felt with the thickness of 2.0-3.0 cm;
s6, blanking, namely cooling the soundproof cotton felt obtained in the step S5 to normal temperature, and blanking by a blanking machine;
s7, shaping, sewing the blanked soundproof cotton felt, and gluing the surface of the soundproof cotton felt to prepare the ultralow frequency soundproof cotton.
Example 2:
a production process of ultra-low frequency soundproof cotton is characterized in that: the method specifically comprises the following steps:
s1: weighing, sieving polyethylene high polymer resin powder, natural rubber resin and calcium powder in sequence to ensure that the size of the additive meets the production standard, and weighing the corresponding parts of additive for later use;
s2, mixing, namely adding polyethylene high polymer resin powder, natural rubber resin and calcium powder into a reaction kettle, stirring for 5-15min, controlling the stirring rotation speed in the stirring kettle to be 500r/min, adding a plasticizer, a high temperature agent and a calcium-zinc stabilizer into the reaction kettle, stirring for 10min, adding carbon black into the reaction kettle, stirring for 4min, and controlling the stirring rotation speed of the reaction kettle to be 900r/min;
s3, banburying, namely adding the mixed material prepared in the step S2 into an internal mixer to carry out banburying, wherein the banburying temperature is 180 ℃, the initial banburying time is 40min, and then carrying out mixing for 10min after each time of adding the mixed material, so as to obtain a mixed material;
s4, shaping, namely putting the mixed materials in the step S3 into an extruder for hot melting plasticization, extruding the mixed materials into a die, and cooling the extruded mixed materials to 50 degrees for shaping to obtain blanks;
s5, forming, namely, carrying out roll casting forming on the blank obtained in the step S4 by a roll casting machine to obtain the sound insulation cotton felt with the thickness of 2.0-3.0 cm;
s6, blanking, namely cooling the soundproof cotton felt obtained in the step S5 to normal temperature, and blanking by a blanking machine;
s7, shaping, sewing the blanked soundproof cotton felt, and gluing the surface of the soundproof cotton felt to prepare the ultralow frequency soundproof cotton.
Example 3:
a production process of ultra-low frequency soundproof cotton is characterized in that: the method specifically comprises the following steps:
s1: weighing, sieving polyethylene high polymer resin powder, natural rubber resin and calcium powder in sequence to ensure that the size of the additive meets the production standard, and weighing the corresponding parts of additive for later use;
s2, mixing, namely adding polyethylene high polymer resin powder, natural rubber resin and calcium powder into a reaction kettle, stirring for 5-15min, controlling the stirring rotation speed in the stirring kettle to be 600r/min, adding a plasticizer, a high temperature agent and a calcium-zinc stabilizer into the reaction kettle, stirring for 15min, adding carbon black into the reaction kettle, stirring for 6min, and controlling the stirring rotation speed of the reaction kettle to be 1000r/min;
s3, banburying, namely adding the mixed material prepared in the step S2 into an internal mixer to carry out banburying, wherein the banburying temperature is 200 ℃, the initial banburying time is 45min, and then carrying out mixing for 15min after each time of adding the mixed material, so as to obtain a mixed material;
s4, shaping, namely putting the mixed materials in the step S3 into an extruder for hot melting plasticization, extruding the mixed materials into a die, and cooling the extruded mixed materials to 60 degrees for shaping to obtain blanks;
s5, forming, namely, carrying out roll casting forming on the blank obtained in the step S4 in a roll casting machine to obtain a sound insulation cotton felt with the thickness of 2.0-3.0 cm;
s6, blanking, namely cooling the soundproof cotton felt obtained in the step S5 to normal temperature, and blanking by a blanking machine;
s7, shaping, sewing the blanked soundproof cotton felt, and gluing the surface of the soundproof cotton felt to prepare the ultralow frequency soundproof cotton.
The production process of the above examples 1-3 was carried out by taking the finished sample pieces of the soundproof cotton felt prepared as described above, and listing the items to be tested and the test results in the following table, and the finished sample pieces of the present invention were sent to the university of Nanjing for testing.
1. Sound isolation amount data detection for each frequency band
2. Hardness and density measurements of the finished soundproof cotton felt prepared in each example:
| sampled piece | Hardness (HB) | Density (Shore hardness/A) | Environmental protection grade | Bending resistance (Mpa) |
| Example 1 | General (1.5) | 70 | I | 4.2 |
| Example 2 | Good (1.8) | 76 | I | 4.6 |
| Example 3 | Excellent (2.1) | 84 | I | 5.1 |
In summary, in the invention, the density of the rubber is increased by the formula, namely, compared with the prior art, the filler mesh number is finely adjusted from 300 meshes to 1200 meshes, so that the density of the rubber is 1.7+/-0.2 g/cm 3 Adjust to 1.9 plus or minus 0.2g/cm 3 The sound insulation capability of the rubber is enhanced, so that the molecular content and the structural force among molecules in unit area are increased in the modified resin and the high polymer substance, and the noise blocking capability of the sound insulation material is enhanced;
the hardness of the rubber is reduced, the using amount of the plasticizer is increased by about 10%, the hardness of the rubber is reduced to 75+/-10A from the original Shore 85+/-10A, the damping capacity of the rubber is increased, noise is better absorbed, the effect of enhancing sound insulation is achieved, other performances keep the performances (such as environmental protection, flame retardance and folding resistance) of the traditional sound insulation layer, and the calcium-zinc stabilizer in the components of the formula can keep the internal structure of the rubber sound insulation material stable in a cold environment and keep better physical characteristics.
Referring to fig. 2 to 7, the present invention provides a technical scheme of a production detection device for ultra-low frequency soundproof cotton:
the production detection device of ultralow frequency soundproof cotton comprises a soundproof room 1 for closed detection, wherein a first noise source mechanism 2 and a second noise source mechanism 3 are fixedly arranged in parallel in the soundproof room 1, the first noise source mechanism 2 comprises a sealing box 21, two parallel guide grooves 22 are formed in two sides of the top of the sealing box 21, supporting components 25 are arranged at four corners in the first noise source mechanism 2, a fixing plate 23 is fixedly arranged above the supporting components 25, a noise component 24 is fixedly arranged at the center of the upper part of the fixing plate 23, and a positioning mechanism 4 is movably arranged above the first noise source mechanism 2;
the positioning mechanism 4 comprises a positioning frame 41 matched with the sealing box 21, an electric sliding rail 42 matched with the guide groove 22 is fixedly arranged at the bottom of the positioning frame 41, the positioning frame 41 is in sliding connection with the sealing box 21 through the electric sliding rail 42, the positioning frame 41 is in a hollowed-out arrangement, a placement notch 43 for placing the soundproof cotton felt is formed in the positioning frame 41, and a fixing frame 44 matched with the positioning frame 41 is hinged above the positioning frame 41;
the bottom of the fixed frame 44 is fixedly connected with a first sealing ring 441 and a second sealing ring 442 at positions corresponding to the placement notch 43, the first sealing ring 441 is sleeved on the inner side of the second sealing ring 442, a certain distance is arranged between the first sealing ring 441 and the second sealing ring 442, a positioning ring groove 443 is formed at the bottom of the fixed frame 44 by the first sealing ring 441 and the second sealing ring 442, a plurality of positioning components are uniformly fixed in the positioning ring groove 443 at equal intervals, and a detection mechanism 5 is arranged above the fixed frame 44;
the detection mechanism 5 comprises a sealing shell 51 fixedly mounted on a fixed frame 44, and a frequency sensor 52 and a decibel sensor 53 are fixedly mounted at the top end inside the sealing shell 51.
In the invention, the first noise source mechanism 2 and the second noise source mechanism 3 are fixedly arranged in the sound insulation room 1, and the structures of the first noise source mechanism 2 and the second noise source mechanism 3 are similar, so that the purpose of the first noise source mechanism 2 and the second noise source mechanism 3 is to perform secondary detection on sound insulation cotton, and a plurality of supporting components 25 are fixedly arranged in the first noise source mechanism 2. The fixed plate 23 is arranged above the early support component 25, and the noise component 24 is arranged above the fixed plate 23, so that the noise component 24 is used as a noise source in the invention and is not the focus of the invention;
according to the invention, the positioning mechanism 4 is arranged in the soundproof room 1, the positioning mechanism 4 is used for positioning and testing the soundproof cotton felt, and in the actual testing process, the positioning frame 41 in the positioning mechanism 4 is hinged, the fixing frame 44 is fixedly arranged above the fixing frame 44, so that the fixing frame 44 and the positioning frame 41 are opened during detection, then the tested soundproof cotton felt is placed in the placement notch 43 in the positioning frame 41, and then the fixing frame 44 is reversed, so that the tested soundproof cotton felt is fixedly arranged on the positioning frame 41 through the fixing frame 44, and then the whole formed by the positioning frame 41, the fixing frame 44, the soundproof cotton felt and the detection mechanism 5 is movably arranged on the first noise source mechanism 2 or the second noise source mechanism 3, namely, the noise detection work of the soundproof cotton felt is completed through the matched use of the first noise source mechanism 2, the second noise source mechanism 3 and the detection mechanism 5.
In the invention, an opening 11 is formed on one side of a sound insulation room 1, a sound insulation door 12 is fixedly arranged at the opening 11, a bracket 13 is fixedly arranged at the opening 11, the bracket 13 is arranged for placing a positioning frame 41, a fixing frame 44 and a detection mechanism 5 when feeding, namely, the whole of the positioning mechanism 4 and the detection mechanism 5 is moved to the upper part of the bracket 13 when measuring, in the actual installation process, a sliding notch matched with an electric sliding rail 42 at the bottom of the positioning frame 41 is formed on the bracket 13, and the whole of the positioning mechanism 4 and the detection mechanism 5 sequentially arrives at the upper parts of a first noise source mechanism 2 and a second noise source mechanism 3 through the bracket 13 and the opening 11;
firstly, separating a positioning frame 41 from a fixing frame 44, enabling a placement notch 43 above the positioning frame 41 to be exposed, then placing a to-be-detected soundproof cotton felt into the placement notch 43, and then reversing the fixing frame 44, namely, clamping the soundproof cotton felt through the fixing frame 44 and the positioning frame 41, wherein a plurality of positioning components are arranged at the bottom of the fixing frame 44, and a first sealing ring 441 and a second sealing ring 442 are arranged at the bottom of the fixing frame 44, so that when the soundproof cotton felt is fixed and clamped, the first sealing ring 441 and the second sealing ring 442 are tightly attached to the soundproof cotton felt, and therefore, leakage of the joints of the sound wave heavy fixing frame 44, the soundproof cotton felt and the positioning frame 41 is avoided during detection, and the actual detection effect is affected;
in the present invention, the electric sliding rail 42 is fixedly arranged at the bottom of the positioning frame 41, and in actual use, the electric sliding rail 42 is provided with a power source, i.e. the positioning frame 41, the fixing frame 44, the soundproof cotton felt and the detecting mechanism 5 can be driven to move, which is a conventional and known technology, and is not repeated in the present invention.
The to-be-positioned frame 41, the fixed frame 44, the soundproof cotton felt and the detection mechanism 5 enter the soundproof room 1 through the opening 11, then go to the position above the first noise source mechanism 2, the electric sliding rail 42 at the bottom of the positioning frame 41 is embedded into the sealed box 21, the top of the sealed box 21 is sealed by the sealed shell 51, then the noise component 24 in the sealed box 21 is started, then the noise emitted in the sealed box 21 is subjected to decibel detection and frequency detection directly through the frequency sensor 52 and the decibel sensor 53 in the sealed shell 51, in actual use, the sealed shell 51 is electrically connected with a computer detection terminal, and the frequency sensor 52 is connected with the computer detection terminal, so that convenience in data acquisition and storage is realized, and the most direct data can be obtained directly;
according to the invention, the first noise source mechanism 2 and the second noise source mechanism 3 have the same structure, the height positions of the noise components 24 in the first noise source mechanism 2 and the second noise source mechanism 3 are different, after the first noise source mechanism 2 is subjected to primary detection, the positioning frame 41, the fixing frame 44, the soundproof cotton felt and the detection mechanism 5 are driven by the electric sliding rail 42 to move, so that the positioning frame 41, the fixing frame 44, the soundproof cotton felt and the detection mechanism 5 are moved to the upper side of the second noise source mechanism 3, the soundproof cotton felt is detected in the environment of the second noise source mechanism 3, the distance between the fixed soundproof cotton felt and the sealing shell 51 and the frequency sensor 52 is ensured, the detection distance is constant, the noise sources at different distances are convenient to detect, the difference in the soundproof effect generated by the soundproof cotton felt is more accurate and reliable, and when the soundproof cotton felt is subjected to noise test, the noise test on two sides is carried out, the noise detection results can be more accurately set by the top of the first noise source mechanism 2 and the second noise source mechanism 3, and the noise sensor 1 is further, the noise detection results can be accurately sealed, and the noise is prevented from being detected.
As an embodiment of the present invention, as shown in fig. 1 and 5, the supporting assembly 25 includes a threaded rod 251 rotatably connected to the sealing box 21, a threaded cylinder 252 is screwed above the threaded rod 251, a driven gear 253 is fixedly connected to the bottom of the threaded rod 251, a driving chain 254 is disposed inside the sealing box 21, and the driving chain 254 is connected to the driven gears 253 in the plurality of supporting assemblies 25;
the positioning assembly comprises a spring 444, a positioning disc 445 matched with the positioning ring groove 443 is arranged at the bottom of the spring 444, and two ends of the spring 444 are fixedly connected with the fixed frame 44 and the positioning disc 445 respectively.
In operation, the supporting component 25 is arranged to change the height positions of the fixing plate 23 and the noise component 24 in the first noise source mechanism 2 and the second noise source mechanism 3, in the invention, power sources are arranged in the first noise source mechanism 2 and the second noise source mechanism 3 in advance, and the power sources can adopt motors;
because the thread cylinder 252 is in threaded connection with the threaded rod 251, and the thread cylinder 252 is fixedly connected with the fixed plate 23, namely, when the threaded rod 251 rotates, the thread cylinder 252 moves upwards, namely, through the integral cooperation of the plurality of supporting components 25, the height positions of the fixed plate 23 and the noise component 24 inside the first noise source mechanism 2 and the second noise source mechanism 3 are respectively changed, namely, the height difference exists between the noise component 24 in the second noise source mechanism 3 and the noise component 24 in the first noise source mechanism 2, so that the noise sources at different distances can be conveniently measured, and the difference in the sound insulation effect generated by the soundproof cotton felt is convenient to measure.
In the invention, a plurality of positioning components are arranged in the placement notch 43, and when the sound-proof cotton felt is positioned through the fixing frame 44 and the positioning frame 41, the positioning disk 445 is pushed by the reaction force of the spring 444 to fix the sound-proof cotton felt, so that the fixing effect of the sound-proof cotton felt is better, and the follow-up sound-proof test work of the sound-proof cotton felt is facilitated;
when the sound insulation cotton felt is positioned, the first sealing ring 441 and the second sealing ring 442 are tightly attached to the sound insulation cotton felt, and meanwhile, the first sealing ring 441 and the second sealing ring 442 are in a compressed state, and in the invention, the first sealing ring 441 and the second sealing ring 442 can be made of sponge materials or other sound absorbing materials, so that leakage at the joint of the sound wave heavy fixing frame 44, the sound insulation cotton felt and the positioning frame 41 is avoided during detection, and the actual detection effect is influenced.
Working principle: during operation, the positioning frame 41 and the fixing frame 44 are separated, so that the placement notch 43 above the positioning frame 41 is exposed, then the to-be-detected soundproof cotton felt is placed in the placement notch 43, then the fixing frame 44 is turned over, namely, the to-be-detected soundproof cotton felt is held through the fixing frame 44 and the positioning frame 41, so that the to-be-detected soundproof cotton felt is fixedly arranged on the positioning frame 41 through the fixing frame 44, and then the whole formed by the positioning frame 41, the fixing frame 44, the soundproof cotton felt and the detection mechanism 5 is movably placed on the first noise source mechanism 2 or the second noise source mechanism 3, namely, the noise detection work is carried out on the soundproof cotton felt through the cooperation of the first noise source mechanism 2, the second noise source mechanism 3 and the detection mechanism 5;
the height positions of the fixed plate 23 and the noise component 24 inside the first noise source mechanism 2 and the second noise source mechanism 3 are respectively changed by the integral matching use of the plurality of support components 25 in advance, namely, the height difference exists between the noise component 24 in the second noise source mechanism 3 and the noise component 24 in the first noise source mechanism 2;
the positioning frame 41, the fixing frame 44, the soundproof cotton felt and the detection mechanism 5 enter the soundproof room 1 through the opening 11, then go above the first noise source mechanism 2, the electric sliding rail 42 at the bottom of the positioning frame 41 is embedded into the sealing box 21, the sealing shell 51 seals the top of the sealing box 21, then the noise component 24 in the sealing box 21 is started, and then the noise emitted by the inside of the sealing box 21 is detected in a decibel mode and detected in a frequency mode directly through the frequency sensor 52 and the decibel sensor 53 in the sealing shell 51;
after the detection work of the soundproof cotton felt is finished on the first noise source mechanism 2, the positioning frame 41, the fixing frame 44, the soundproof cotton felt and the detection mechanism 5 are driven by the electric sliding rail 42 to move, so that the positioning frame 41, the fixing frame 44, the soundproof cotton felt and the detection mechanism 5 move to the upper part of the second noise source mechanism 3, and the soundproof cotton felt is detected in the environment of the second noise source mechanism 3 in the same way as the above, the distance between the fixed soundproof cotton felt and the sealing shell 51 and the frequency sensor 52 is ensured, the distance for each detection noise is consistent, the detection distance is constant, the noise sources at different distances are convenient to detect, and the difference in the soundproof effect generated by the soundproof cotton felt is further more accurate and reliable in detection data.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. Production detection device of ultra-low frequency soundproof cotton is applied to preparation soundproof cotton felt, its characterized in that: including being used for seal detection's sound insulation room (1), the inside parallel fixed first noise source mechanism (2) and the second noise source mechanism (3) that are provided with in sound insulation room (1), first noise source mechanism (2) are including seal box (21), guide way (22) that are parallel to each other have been seted up to the both sides of seal box (21) top, the inside four corners department of first noise source mechanism (2) all is provided with supporting component (25), the fixed plate (23) that is provided with in top of supporting component (25), fixed plate (23) top central part fixed mounting has noise component (24), the top movable mounting of first noise source mechanism (2) has positioning mechanism (4);
the positioning mechanism (4) comprises a positioning frame (41) matched with the sealing box (21), an electric sliding rail (42) matched with the guide groove (22) is fixedly arranged at the bottom of the positioning frame (41), the positioning frame (41) is in sliding connection with the sealing box (21) through the electric sliding rail (42), the positioning frame (41) is in hollowed-out arrangement, a placement notch (43) for placing the soundproof cotton felt is formed in the positioning frame (41), and a fixing frame (44) matched with the positioning frame (41) is hinged above the positioning frame (41);
the fixing device is characterized in that a first sealing ring (441) and a second sealing ring (442) are fixedly connected to the bottom of the fixing frame (44) at positions corresponding to the placement gaps (43), the first sealing ring (441) is sleeved on the inner side of the second sealing ring (442), a certain distance is arranged between the first sealing ring (441) and the second sealing ring (442), a positioning ring groove (443) is formed in the bottom of the fixing frame (44) by the first sealing ring (441) and the second sealing ring (442), a plurality of positioning components are uniformly fixed in the positioning ring groove (443) at equal intervals, and a detection mechanism (5) is arranged above the fixing frame (44);
the detection mechanism (5) comprises a sealing shell (51) fixedly mounted on the fixing frame (44), and a frequency sensor (52) and a decibel sensor (53) are fixedly mounted at the top end inside the sealing shell (51).
2. The production detection device for ultra-low frequency soundproof cotton according to claim 1, wherein: the support assembly (25) comprises a threaded rod (251) rotationally connected with the seal box (21), a threaded cylinder (252) is connected above the threaded rod (251) in a threaded manner, a driven gear (253) is fixedly connected to the bottom of the threaded rod (251), a transmission chain (254) is arranged in the seal box (21), and the transmission chain (254) is connected with the driven gears (253) in the plurality of support assemblies (25);
the positioning assembly comprises a spring (444), a positioning disc (445) matched with the positioning ring groove (443) is arranged at the bottom of the spring (444), and two ends of the spring (444) are fixedly connected with the fixing frame (44) and the positioning disc (445) respectively.
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