CN115122563B - Special equipment and process for biodegradation micro-crosslinking foaming - Google Patents
Special equipment and process for biodegradation micro-crosslinking foaming Download PDFInfo
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- CN115122563B CN115122563B CN202211008474.1A CN202211008474A CN115122563B CN 115122563 B CN115122563 B CN 115122563B CN 202211008474 A CN202211008474 A CN 202211008474A CN 115122563 B CN115122563 B CN 115122563B
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- screw extrusion
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- equipment
- vulcanizing
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- 238000005187 foaming Methods 0.000 title claims abstract description 66
- 238000004132 cross linking Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000008569 process Effects 0.000 title claims description 14
- 238000006065 biodegradation reaction Methods 0.000 title description 3
- 239000000463 material Substances 0.000 claims abstract description 112
- 230000007246 mechanism Effects 0.000 claims abstract description 86
- 238000003756 stirring Methods 0.000 claims abstract description 29
- 238000001125 extrusion Methods 0.000 claims description 135
- 238000009434 installation Methods 0.000 claims description 42
- 238000004073 vulcanization Methods 0.000 claims description 25
- 239000000155 melt Substances 0.000 claims description 24
- 238000007789 sealing Methods 0.000 claims description 17
- -1 polyol ester Chemical class 0.000 claims description 10
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 229920005862 polyol Polymers 0.000 claims description 9
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 239000003431 cross linking reagent Substances 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 230000001737 promoting effect Effects 0.000 claims 4
- 229920001896 polybutyrate Polymers 0.000 claims 3
- 239000004629 polybutylene adipate terephthalate Substances 0.000 description 8
- 229920002725 thermoplastic elastomer Polymers 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 239000006260 foam Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 4
- 239000013013 elastic material Substances 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 229920000704 biodegradable plastic Polymers 0.000 description 3
- 239000004088 foaming agent Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000006261 foam material Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 1
- ZPMCCZKDFLIVHD-UHFFFAOYSA-N 2-tert-butylperoxy-2-methylpropane;1,2-di(propan-2-yl)benzene Chemical compound CC(C)(C)OOC(C)(C)C.CC(C)C1=CC=CC=C1C(C)C ZPMCCZKDFLIVHD-UHFFFAOYSA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229920001911 maleic anhydride grafted polypropylene Polymers 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/3402—Details of processes or apparatus for reducing environmental damage or for working-up compositions comprising inert blowing agents or biodegradable components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
- B29B9/065—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion under-water, e.g. underwater pelletizers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/002—Component parts, details or accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/3403—Foaming under special conditions, e.g. in sub-atmospheric pressure, in or on a liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/3442—Mixing, kneading or conveying the foamable material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0012—Combinations of extrusion moulding with other shaping operations combined with shaping by internal pressure generated in the material, e.g. foaming
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/122—Hydrogen, oxygen, CO2, nitrogen or noble gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92085—Velocity
- B29C2948/92095—Angular velocity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92085—Velocity
- B29C2948/92104—Flow or feed rate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/06—CO2, N2 or noble gases
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2453/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2453/02—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers of vinyl aromatic monomers and conjugated dienes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Thermal Sciences (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Medicinal Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Environmental & Geological Engineering (AREA)
- Environmental Sciences (AREA)
- Toxicology (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
The invention discloses a special device for biodegradable micro-crosslinking foaming, which comprises a stirring mechanism, wherein the stirring mechanism is communicated with a plasticizing crosslinking mechanism through a pipeline, the plasticizing crosslinking mechanism is communicated with a foaming mechanism through a conveying mechanism, and a physical foaming method is utilized to prepare a biodegradable micro-crosslinking foaming material.
Description
Technical Field
The invention relates to the technical field of elastomer foaming materials, in particular to special equipment and a process for biodegradable micro-crosslinking foaming.
Background
With the rapid development of the plastic industry, the use amount of thermoplastic elastomers such as TPE, TPO, TPU, TPV is increasing, and most of these thermoplastic elastomers are non-degradable materials, which can cause serious pollution to the environment after being discarded.
In order to solve the environmental problems caused by plastic products, one of the more effective methods is to use biodegradable materials instead of conventional materials. Polybutylene adipate terephthalate (PBAT) is a terpolymer of 1, 4-butanediol, adipic acid and terephthalic acid, has excellent biodegradability due to the existence of ester groups, is one of hot spots in the current biodegradable plastic research, and has good market application. However, the thermoplastic biodegradable plastic itself has high hardness and poor elasticity, and the foamed polymer material can be obtained by filling gas into the thermoplastic biodegradable plastic by a physical foaming or chemical foaming method. The foaming material has a series of advantages of small density, good heat and sound insulation, good elasticity, buffering property and the like.
The foam material prepared by chemical foaming has the environmental problems of chemical residues such as formamide, smell and the like, if a foaming product is obtained by physical foaming, the low-melting-point thermoplastic elastomer with huge market use amount at present has the defects of serious permanent deformation and poor dimensional stability caused by creep of a crystalline region molten polymer in the foam in the use process due to the lower melting point of the raw material resin.
Disclosure of Invention
The invention provides a special device and a process for biodegradable micro-crosslinking foaming, which are used for solving the technical problems that the foam material prepared by chemical foaming at present has chemical residues such as formamide, smell and the like, if a foaming product is obtained by physical foaming, the melting point of raw material resin is lower, and the crystalline region molten polymer in the foam can creep to cause serious permanent deformation and poor dimensional stability in the using process of the low-melting-point thermoplastic elastomer with huge market use amount at present.
The special equipment for biodegradable micro-crosslinking foaming comprises a stirring mechanism, wherein the stirring mechanism is communicated with a plasticizing crosslinking mechanism through a pipeline, and the plasticizing crosslinking mechanism is communicated with a foaming mechanism through a conveying mechanism.
Preferably, the plasticizing crosslinking mechanism comprises a first screw extrusion device and a vulcanizing device, wherein a feed inlet of the first screw extrusion device is communicated with an outlet of a pipeline, a discharge outlet of the first screw extrusion device corresponds to the feed inlet of the vulcanizing device, an inlet of the pipeline is communicated with a discharge outlet of the stirring mechanism, and a valve is arranged on the pipeline.
Preferably, the vulcanizing device is a vulcanizing oven, the first screw extrusion device is a double screw extruder, the conveying mechanism is a melt pump, and an inlet of the melt pump is communicated with a discharge port of the vulcanizing device through a first conveying pipe.
Preferably, the foaming mechanism comprises a second screw extrusion device and an underwater pelletizer, wherein a feed inlet of the second screw extrusion device is communicated with an outlet of the melt pump through a second conveying pipe, and a discharge outlet of the second screw extrusion device is communicated with a feed inlet of the underwater pelletizer.
Preferably, the second screw extrusion device is a single screw extruder, the side end of the second screw extrusion device is also provided with a plurality of air inlet pipes, the air inlet pipes are communicated with the internal cavity of the second screw extrusion device, and the internal cavity of the second screw extrusion device is provided with a medium layer.
Preferably, the vulcanization equipment is equipped with a vulcanization acceleration mechanism, the vulcanization acceleration mechanism comprising:
The base is internally and fixedly provided with a motor, the motor is fixedly connected with a fixed section of a telescopic rod III, and a movable section of the telescopic rod III is fixedly connected with the mounting shell;
the two grooves are symmetrically arranged at the left side and the right side of the upper end of the base, lifting sleeves are slidably arranged in the grooves, and springs five are fixedly arranged between the lifting sleeves and the grooves;
The rotating block is fixedly connected with the fixed section of the telescopic rod III, an arc-shaped groove is arranged outside the rotating block, the arc-shaped groove is in sliding connection with a connecting shaft, the connecting shaft is in rotary connection with the horizontal end of the L-shaped rod, and the vertical end of the L-shaped rod is fixedly connected with the lifting sleeve;
the supporting plate is fixedly arranged at the lower end of the mounting shell, a through hole for the movable section of the telescopic rod III to pass through is formed in the middle of the supporting plate, the supporting plate is fixedly connected with the connecting cavity inside the lifting sleeve, the mounting shell 811 is rotationally connected with the connecting cavity inside the lifting sleeve, and one end, far away from the mounting shell, of the supporting plate is fixedly connected with the vertical end of the L-shaped rod;
the two fixing plates are symmetrically arranged at the left side and the right side of the upper end of the base, one end, far away from the base, of each fixing plate is provided with a guide sleeve, and the upper end and the lower end of each guide sleeve are provided with guide cavities in a penetrating way;
The upper end and the lower end of the fixing sleeve are penetrated with a fixing cavity which is fixedly connected with the vulcanizing device, the vulcanizing device is arranged between the upper end and the lower end of the cavity in the mounting shell in a sliding manner, and a spring six is fixedly arranged between the vulcanizing device and the right end of the cavity;
the two first connecting rods are symmetrically arranged at the front end and the rear end of the fixed sleeve, the side ends of the first connecting rods penetrating through the fixed cavity are rotationally connected with the guide balls, and the guide balls are matched with the guide cavity.
Preferably, the interface flange department of melt pump installs stabilizing mean, and stabilizing mean includes:
The lower end of the base block is fixedly connected with the movable end of the telescopic rod II, the movable end of the telescopic rod II is sleeved with a spring I, gears are symmetrically arranged at the front end and the rear end of the base block, the left side and the right side of the gears are hinged with the movable end of the telescopic rod I, and the movable end of the telescopic rod I is sleeved with a spring II;
The left side and the right side of the upper end of the bottom plate are respectively hinged with the fixed end of the first telescopic rod, and the middle part of the upper end of the bottom plate is fixedly connected with the fixed end of the second telescopic rod;
The two sliding seats are symmetrically arranged at the left side and the right side of the upper end of the base block;
The two sliding shells are respectively connected with the sliding seat in a sliding way, a rack is fixedly connected between the lower sides of the two sliding shells, the rack is meshed with the gear, a movable cavity is arranged in the upper side of the sliding shells, the front side and the rear side of one end of the movable cavity, which is close to the rack, are communicated with each other, the movable holes are communicated with the outside through the sliding holes, and the sliding holes are arranged at the front end and the rear end of the upper side of the sliding shells in a penetrating way;
The two sliding plates are respectively arranged in the movable cavities in the two sliding shells in a sliding way, one end of each sliding plate is fixedly connected with the threaded rod, the threaded rod is in threaded connection with the threaded sleeve, one end of the threaded sleeve, which penetrates through the movable cavity and is far away from the rack, is fixedly connected with an external operation block, and the threaded sleeve is in rotary connection with one end of the movable cavity, which is far away from the rack;
The first matching block is fixedly connected with one end, far away from the threaded rod, of the two sliding plates respectively, the front side and the rear side of the first matching block are in sliding connection with the second matching block, and the second matching block is in sliding connection with one end, close to the rack, of the movable cavity;
The four L-shaped blocks are connected with the sliding shells on the left side and the right side in a group-by-group mode, the vertical ends of the L-shaped blocks are connected with the sliding holes in a sliding mode, the horizontal ends of the L-shaped blocks are fixedly connected with the second connecting rods, the second connecting rods penetrate through the side ends of the sliding shells and enter the movable cavity, the second connecting rods are fixedly connected with the second matching blocks, a spring III is fixedly arranged between the horizontal ends of the L-shaped blocks and the side ends of the sliding shells, and the spring III is sleeved on the second connecting rods;
the four contact blocks are respectively connected with the movable holes on the two sliding shells in a sliding manner, the contact blocks are fixedly connected with the fixed rod, and the side ends of the fixed rod penetrating through the movable holes are communicated with the outside;
The front side and the rear side of one end, which is far away from each other, of the two installation arc blocks are fixedly connected with an external fixing rod respectively, one end, which is close to each other, of the two installation arc blocks is provided with an installation groove I, the installation groove I is meshed with the outside of an interface flange of the melt pump, the front end and the rear end of the installation arc block I are provided with an installation arc block II, one end, which is close to each other, of the installation arc blocks on the left side and the right side is provided with an installation groove II, and the installation groove II is meshed with the outside of the melt pump;
A spring IV is fixedly arranged between the mounting arc block I and the sliding shell;
The sealing grooves are symmetrically arranged on the first two sides of one end of the first installation arc block, the sealing grooves on the first installation arc blocks on the left side and the right side are correspondingly arranged, and sealing strips are arranged between the sealing grooves on the left side and the right side.
Preferably, a biodegradable micro-crosslinking foaming process comprises the following steps:
Step 1: adding a certain amount of SEBS material and biodegradable polyol ester into a stirring mechanism for mixing, and standing for a period of time after the mixing is finished;
Step 2: after a period of time, continuously adding a certain amount of PBAT material, compatilizer and cross-linking agent into the stirring mechanism, and continuously stirring;
step 3: the mixed material after stirring enters a plasticizing crosslinking mechanism through a pipeline, and the mixed material is subjected to plasticizing and vulcanizing steps in sequence;
step 4: starting a material conveying mechanism, and conveying the mixed material after the vulcanization step into a foaming mechanism for foaming.
Preferably, the quantity of SEBS materials in the step 1 is 10-20 parts, and the quantity of biodegradable polyol esters is 5-25 parts; the quantity of the PBAT material in the step 2 is 50-70 parts, the quantity of the compatilizer is 5-15 parts, and the quantity of the cross-linking agent is 0.1% -0.5% of the total weight of the SEBS material, the biodegradable polyol ester, the PBAT material and the compatilizer.
Preferably, in the step 3, when the mixed material enters the plasticizing crosslinking mechanism, the mixed material firstly enters screw extrusion equipment I for plasticizing and extruding, the screw extrusion equipment I sends the plasticized mixed material into a vulcanization oven for vulcanization, the mixed material after the vulcanization in the step 4 firstly enters screw extrusion equipment II for foaming and extruding, and the screw extrusion equipment II finally sends the mixed material into an underwater pelletizer for pelleting.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the structure of the vulcanization acceleration mechanism of the present invention;
FIG. 3 is a schematic view of a stabilizing mechanism according to the present invention;
FIG. 4 is a schematic view showing the internal structure of the sliding housing of the present invention;
fig. 5 is a schematic view of a first installation arc block and a second installation arc block according to the present invention.
Reference numerals illustrate: 1. a stirring mechanism; 2. a pipeline; 21. a valve; 3. screw extrusion equipment I; 4. a vulcanizing device; 5. a melt pump; 51. a second material conveying pipe; 6. screw extrusion equipment II; 61. a dielectric layer; 62. an air inlet pipe; 7. an underwater pelletizer; 8. a base; 81. a motor; 82. a groove; 83. a spring V; 84. a lifting sleeve; 85. an L-shaped rod; 86. a connecting shaft; 87. a rotating block; 88. an arc-shaped groove; 89. a telescopic rod III; 810. a support plate; 811. a mounting shell; 812. a cavity; 813. a fixing plate; 814. a guide sleeve; 815. a guide chamber; 816. a fixed sleeve; 817. a first connecting rod; 818. a guide ball; 819. a fixed cavity; 820. a spring six; 9. a bottom plate; 91. a second telescopic rod; 92. a first spring; 93. a first telescopic rod; 94. a second spring; 95. a base block; 96. a sliding seat; 97. a gear; 98. a rack; 99. a sliding housing; 910. installing an arc block I; 911. installing an arc block II; 912. sealing grooves; 913. a sealing strip; 914. an operation block; 915. a thread sleeve; 916. a threaded rod; 917. a spring IV; 918. a movable cavity; 919. a sliding plate; 920. a first matching block; 921. a second matching block; 922. an L-shaped block; 923. a second connecting rod; 924. a third spring; 925. a sliding hole; 926. a contact block; 927. a fixed rod; 928. a movable hole.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
In addition, the descriptions of the "first," "second," and the like, herein are for descriptive purposes only and are not intended to be specifically construed as order or sequence, nor are they intended to limit the invention solely for distinguishing between components or operations described in the same technical term, but are not to be construed as indicating or implying any relative importance or order of such features. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, technical solutions and technical features between the embodiments may be combined with each other, but it is necessary to base that a person skilled in the art can implement the combination of technical solutions, when the combination of technical solutions contradicts or cannot be implemented, should be considered that the combination of technical solutions does not exist, and is not within the scope of protection claimed by the present invention.
The invention provides the following examples
Examples
The invention provides special equipment for biodegradation micro-crosslinking foaming, which is shown in figure 1, and comprises a stirring mechanism 1, wherein the stirring mechanism 1 is communicated with a plasticizing crosslinking mechanism through a pipeline 2, and the plasticizing crosslinking mechanism is communicated with a foaming mechanism through a material conveying mechanism;
a biodegradable micro-crosslinking foaming process comprises the following steps:
Step 1: adding a certain amount of SEBS material and biodegradable polyol ester into the stirring mechanism 1 for mixing, and standing for a period of time after the mixing is finished;
Step 2: after a period of time, adding a certain amount of PBAT material, compatilizer and cross-linking agent into the stirring mechanism 1, and stirring continuously;
step 3: the mixed material after stirring enters a plasticizing crosslinking mechanism through a pipeline 2, and the mixed material is subjected to plasticizing and vulcanizing steps in sequence;
step 4: starting a material conveying mechanism, and conveying the mixed material after the vulcanization step into a foaming mechanism for foaming.
The beneficial effects of the technical scheme are as follows:
The stirring mechanism 1 is arranged for uniformly stirring the components of the biodegradable micro-crosslinked foaming material according to a certain proportion, the uniformly stirred mixed material enters the plasticizing crosslinking mechanism through the pipeline 2 for plasticizing, extruding and vulcanizing steps to obtain the biodegradable micro-crosslinked elastic material, the material conveying mechanism sends the biodegradable micro-crosslinked elastic material into the foaming mechanism for physical foaming, extruding and granulating steps to obtain biodegradable micro-crosslinked foaming particles, the obtained biodegradable micro-crosslinked foaming particles are filled into a plate-shaped mold, the shape of a product can be controlled through mold design by vapor molding, and the micro-crosslinked structure is introduced into the biodegradable micro-crosslinked foaming material, and the biodegradable micro-crosslinked foaming material is prepared by adopting a physical foaming method, so that the foaming property of the biodegradable micro-crosslinked foaming material is effectively improved by the micro-crosslinked structure, the foaming interval of the material is widened, the foaming multiplying power of the elastic body is increased, the thermal stability is reduced, the permanent deformation of the foam is better, the dimensional stability of the foam is better, and the application requirements of the fields such as the middle sole of shoes can be met; the technical problems that if foaming products are obtained through physical foaming, the low-melting-point thermoplastic elastomer with huge market use amount at present is caused by the fact that the melting point of raw material resin is lower, and the crystalline region molten polymer in the foam can creep to cause serious permanent deformation and poor dimensional stability in the using process are solved.
Example 2
On the basis of the embodiment 1, as shown in fig. 1, the plasticizing crosslinking mechanism comprises a first screw extrusion device 3 and a vulcanizing device 4, wherein a feed inlet of the first screw extrusion device 3 is communicated with an outlet of a pipeline 2, a discharge outlet of the first screw extrusion device 3 corresponds to the feed inlet of the vulcanizing device 4, an inlet of the pipeline 2 is communicated with a discharge outlet of the stirring mechanism 1, and a valve 21 is arranged on the pipeline 2;
The vulcanizing device 4 is a vulcanizing oven, the first screw extrusion device 3 is a double screw extruder, the conveying mechanism is a melt pump 5, and the inlet of the melt pump 5 is communicated with the discharge port of the vulcanizing device 4 through a first conveying pipe;
the foaming mechanism comprises a second screw extrusion device 6 and an underwater granulator 7, wherein a feed inlet of the second screw extrusion device 6 is communicated with an outlet of the melt pump 5 through a second conveying pipe 51, and a discharge outlet of the second screw extrusion device 6 is communicated with a feed inlet of the underwater granulator 7;
The second screw extrusion device 6 is a single screw extruder, a plurality of air inlet pipes 62 are further arranged at the side end of the second screw extrusion device 6, the plurality of air inlet pipes 62 are communicated with the inner cavity of the second screw extrusion device 6, and a medium layer 61 is arranged in the inner cavity of the second screw extrusion device 6;
the number of the air inlet pipes 62 is two, and the two air inlet pipes 62 are respectively filled with a physical foaming agent and high-pressure inert gas, wherein the physical foaming agent is any one of carbon dioxide gas and nitrogen gas;
Optionally, in step 1, the amount of SEBS material is 10-20 parts, and the amount of biodegradable polyol ester is 5-25 parts; the quantity of the PBAT material in the step 2 is 50-70 parts, the quantity of the compatilizer is 5-15 parts, and the quantity of the cross-linking agent is 0.1% -0.5% of the total weight of the SEBS material, the biodegradable polyol ester, the PBAT material and the compatilizer;
The compatilizer is any one of maleic anhydride grafted SEBS, maleic anhydride grafted polypropylene and maleic anhydride grafted POE, and the cross-linking agent is any one of dicumyl peroxide and di-tert-butyl peroxide diisopropylbenzene;
in the step 3, when the mixed material enters a plasticizing crosslinking mechanism, the mixed material firstly enters screw extrusion equipment I3 for plasticizing and extruding, the screw extrusion equipment I3 sends the plasticized mixed material into a vulcanization oven for vulcanizing, the mixed material after the vulcanizing in the step 4 firstly enters screw extrusion equipment II for foaming and extruding, and the screw extrusion equipment II sends the mixed material into an underwater pelletizer for pelletizing.
The beneficial effects of the technical scheme are that:
The stirring mechanism 1 can adopt the existing plastic stirring machine, the valve 21 is arranged on the pipeline 2 and used for controlling the communication and closing of the valve 21, the valve 21 is opened, the mixed material in the stirring mechanism 1 can enter the screw extrusion equipment I3 through the feed inlet of the screw extrusion equipment I3, the extrusion temperature of the screw extrusion equipment I3 is 170-200 ℃, the mixed material is plasticized and extruded, the screw extrusion equipment I3 sends the plasticized mixed material into the vulcanizing oven for vulcanization, the biodegradable micro-crosslinked elastic material is obtained, the feed inlet can be arranged at the top of the vulcanizing oven, the feed outlet of the screw extrusion equipment I3 and the feed inlet of the vulcanizing oven are correspondingly arranged, the mixed material extruded by the screw extrusion equipment I3 falls into the feed inlet of the vulcanizing oven, then the feed inlet of the vulcanizing oven is plugged, the sealing property during the operation of the vulcanizing oven is ensured, the feeding can be carried out between the screw extrusion equipment I3 and the vulcanizing oven through a melt pump, the pressure in the vulcanizing oven is 100 kgf/c-150 kgf/c, and the temperature is 165-175 ℃; under the working condition of a melt pump 5, the biodegradable micro-crosslinked elastic material after the vulcanization step firstly enters a screw extrusion device II 6, high-pressure inert gas and a physical foaming agent are introduced when the screw extrusion device II 6 works, the mixing uniformity of the mixed material is further improved, the foaming step is completed, the biodegradable micro-crosslinked foaming material is obtained, a medium layer 61 is arranged in an inner cavity of the screw extrusion device II 6, the medium layer 61 can be used for cooling medium flowing, the temperature of the inner cavity of the screw extrusion device II 6 is regulated, the accuracy of the material cooling process is improved, the stability of material foaming can be improved, and the biodegradable micro-crosslinked foaming material after foaming is sent to an underwater granulator by the screw extrusion device II to be subjected to a granulating step, so that biodegradable micro-crosslinked foaming particles are obtained.
Example 3
On the basis of example 2, as shown in fig. 2, the vulcanization equipment 4 is equipped with a vulcanization acceleration mechanism including:
The base 8, the inside of the base 8 is fixedly provided with a motor 81, the motor 81 is fixedly connected with a fixed section of a telescopic rod III 89, and a movable section of the telescopic rod III 89 is fixedly connected with a mounting shell 811;
The two grooves 82 are symmetrically arranged on the left side and the right side of the upper end of the base 8, a lifting sleeve 84 is slidably arranged in the groove 82, and a spring five 83 is fixedly arranged between the lifting sleeve 84 and the groove 82;
The rotating block 87, the rotating block 87 is fixedly connected with a fixed section of the telescopic rod III 89, an arc-shaped groove 88 is arranged outside the rotating block 87, the arc-shaped groove 88 is in sliding connection with a connecting shaft 86, the connecting shaft 86 is in rotating connection with the horizontal end of the L-shaped rod 85, and the vertical end of the L-shaped rod 85 is fixedly connected with the lifting sleeve 84;
The supporting plate 810 is fixedly arranged at the lower end of the mounting shell 811, a through hole for the movable section of the telescopic rod III 89 to pass through is formed in the middle of the supporting plate 810, the supporting plate 810 is fixedly connected with the connecting cavity inside the lifting sleeve 84, the mounting shell 811 is rotationally connected with the connecting cavity inside the lifting sleeve 84, and one end of the supporting plate 810, far away from the mounting shell 811, is fixedly connected with the vertical end of the L-shaped rod 85;
the two fixing plates 813 are symmetrically arranged on the left side and the right side of the upper end of the base 8, a guide sleeve 814 is arranged at one end, far away from the base 8, of the fixing plate 813, and guide cavities 815 are formed in the upper end and the lower end of the guide sleeve 814 in a penetrating mode;
The fixing sleeve 816, the upper and lower ends of the fixing sleeve 816 are penetrated and provided with fixing cavities 819, the fixing cavities 819 are fixedly connected with the vulcanizing device 4, the vulcanizing device 4 is arranged between the front and rear ends of the cavity 812 in the mounting shell 811 in a sliding manner, and a spring six 820 is fixedly arranged between the vulcanizing device 4 and the right end of the cavity 812;
The two first connecting rods 817 are symmetrically arranged at the left end and the right end of the fixed sleeve 816, the first connecting rods 817 penetrate through the side ends of the fixed cavity 819 to be rotationally connected with the guide balls 818, and the guide balls 818 are matched with the guide cavities 815;
the mounting housing 811 is provided with a mounting hole through which the first feed pipe passes.
The beneficial effects of the technical scheme are as follows:
When the vulcanizing mechanism is promoted to work, the first conveying pipe connected with the discharge port of the vulcanizing device 4 is required to be dismounted, the influence on the normal work of the vulcanizing mechanism is avoided, the guide cavities 815 are arranged at the upper end and the lower end of the guide sleeve 814 in a penetrating way, the normal feeding of the vulcanizing oven is ensured, the motor 81 is started, the motor 81 drives the telescopic rod III 89 to rotate, the telescopic rod III 89 drives the rotating block 87 and the mounting shell 811 to rotate, the movable cavity of the lifting sleeve 84 plays a guide role on the rotation of the mounting shell 811, the mounting shell 811 rotates to drive the vulcanizing device 4 to rotate, the rotating block 87 rotates to drive the connecting shaft 86 to slide along the arc-shaped groove 88, the L-shaped rod 85 is driven to move up and down, the L-shaped rod 85 drives the supporting plate 810 to move up and down, the supporting plate 810 drives the lifting sleeve 84 to move up and down, the spring five 83 is arranged, the lifting sleeve 84 is driven to move up and down, the lifting sleeve 84 and the supporting plate 810 jointly drive the installation shell 811 to move up and down, thereby driving the vulcanizing device 4 to move up and down, driving the fixed sleeve 816 to move up and down when the installation shell 811 moves up and down, and driving the first connecting rod 817 connected with the fixed sleeve 816 to move up and down, and driving the guide ball 818 to move up and down, and the guide ball 818 is matched with the guide cavity 815, thereby driving the fixed sleeve 816 to move left and right, and driving the vulcanizing device 4 to slide left and right, and through the arrangement of the spring six 820, the stabilizing effect is achieved on the sliding of the vulcanizing device 4, and when the vulcanizing mechanism is promoted, the vulcanizing device 4 is enabled to move up and down and left and right while rotating, so that the mixing uniformity of materials inside the vulcanizing device 4 can be effectively improved, and the vulcanizing effect of the materials inside the vulcanizing device 4 is improved.
Example 4
On the basis of embodiment 2, as shown in fig. 3-5, a stabilizing mechanism is installed at the interface flange of the melt pump 5, and the stabilizing mechanism comprises:
The lower end of the base block 95 is fixedly connected with the movable end of the second telescopic rod 91, the movable end of the second telescopic rod 91 is sleeved with a third spring 92, gears 97 are symmetrically arranged at the front end and the rear end of the base block 95, the left side and the right side of the gears 97 are hinged with the movable end of the first telescopic rod 93, and the movable end of the first telescopic rod 93 is sleeved with a second spring 94;
the bottom plate 9, the left and right sides of the upper end of the bottom plate 9 are respectively hinged with the fixed end of the first telescopic rod 93, the middle part of the upper end of the bottom plate 9 is fixedly connected with the fixed end of the second telescopic rod 91,
The two sliding seats 96 are symmetrically arranged at the left and right sides of the upper end of the base block 95;
The two sliding shells 99 are respectively and slidably connected with the sliding seat 96, a rack 98 is fixedly connected between the lower sides of the two sliding shells 99, the rack 98 is meshed with the gear 97, a movable cavity 918 is arranged in the upper side of the sliding shells 99, movable holes 928 are communicated with the front side and the rear side of one end of the movable cavity 918, which is close to the rack 98, the movable holes 928 are communicated with the outside through sliding holes 925, and the sliding holes 925 are arranged at the front end and the rear end of the upper side of the sliding shells 99 in a penetrating manner;
the two sliding plates 919, the two sliding plates 919 are respectively arranged in the movable cavities 918 in the two sliding shells 99 in a sliding way, one end of the sliding plate 919 is fixedly connected with the threaded rod 916, the threaded rod 916 is in threaded connection with the threaded sleeve 915, the threaded sleeve 915 penetrates through one end of the movable cavity 918 far away from the rack 98 and is fixedly connected with an external operation block 914, and the threaded sleeve 915 is in rotational connection with one end of the movable cavity 918 far away from the rack 98;
the first matching block 920 is fixedly connected with one end of the two sliding plates 919 away from the threaded rod 916, the front side and the rear side of the first matching block 920 are in sliding connection with the second matching block 921, and the second matching block 921 is in sliding connection with one end of the movable cavity 918, which is close to the rack 98;
The four L-shaped blocks 922, two by two, are connected with the sliding shells 99 on the left side and the right side respectively, the vertical ends of the L-shaped blocks 922 are connected with the sliding holes 925 in a sliding manner, the horizontal ends of the L-shaped blocks 922 are fixedly connected with the second connecting rods 923, the second connecting rods 923 penetrate through the side ends of the sliding shells 99 and enter the movable cavity 918, the second connecting rods 923 are fixedly connected with the second matching blocks 921, the third springs 924 are fixedly arranged between the horizontal ends of the L-shaped blocks 922 and the side ends of the sliding shells 99, and the third springs 924 are sleeved on the second connecting rods 923;
the four contact blocks 926, the four contact blocks 926 are respectively connected with the movable holes 928 on the two sliding shells 99 in a sliding way, the contact blocks 926 are fixedly connected with the fixed rods 927, and the fixed rods 927 penetrate through the side ends of the movable holes 928 to be communicated with the outside;
The front side and the rear side of one end, away from each other, of the two installation arc blocks I910 are fixedly connected with an external fixing rod 927 respectively, one end, close to each other, of the two installation arc blocks I910 is provided with an installation groove I, the installation groove I is meshed with the outside of an interface flange of the melt pump 5, the front end and the rear end of the installation arc block I910 are provided with an installation arc block II 911, one end, close to each other, of the installation arc blocks II 911 on the left side and the right side is provided with an installation groove II, and the installation groove II is meshed with the outside of the melt pump 5;
a spring IV 917 is fixedly arranged between the first mounting arc block 910 and the sliding shell 99;
the sealing grooves 912 are symmetrically arranged at the first two sides of the end of the first mounting arc block 910, the sealing grooves 912 on the first mounting arc block 910 at the left and right sides are correspondingly arranged, and sealing strips 913 are arranged between the sealing grooves 912 at the left and right sides.
The working principle and the beneficial effects of the technical scheme are as follows:
A stabilizing mechanism is arranged at an interface flange of the melt pump 5, the interface flange is used for assembling the melt pump 5 with a first conveying pipe and a second conveying pipe, the assembled melt pump 5, the first conveying pipe and the second conveying pipe form a conveying mechanism, after the interface flange is connected, the operation block 914 is controlled to rotate, the operation block 914 drives the threaded sleeve 915 to rotate, the threaded sleeve 915 drives the sliding plate 919 to slide along the movable cavity 918, the sliding plate 919 drives the first matching block 920 to move, the second matching block 921 is pulled to move towards the direction approaching to each other by the first matching block 920, the second matching block 921 drives the L-shaped block 922 to move towards the direction of the sliding shell 99 by the second connecting rod 923, the third spring 924 is always in a stretching state, under the elastic action of the third spring 924, the vertical end of the L-shaped block 922 can be further driven to move towards the direction of the movable hole 928 by passing through the sliding hole 925, the inclined position of the vertical end of the L-shaped block 925 is contacted with the inclined position of the contact block 926, the contact block 926 is pushed to move, the contact block 926 drives the first installation arc block 910 and the second installation arc block 911 to move towards the direction approaching to each other through the fixing rod 927, the first installation groove of the first installation arc block 910 is matched with the interface flange, the second installation groove of the second installation arc block 911 is matched with the first conveying pipe and the second conveying pipe, the first conveying pipe, the second conveying pipe and the interface flange are limited and fixed through the first installation arc block 910 and the second installation arc block 911, the sealing performance of the interface flange of the first installation arc block 910 is improved through the arrangement of the sealing strip 913, after the first installation groove of the first installation arc block 910 is matched with the interface flange, the second installation groove of the second installation arc block 911 is matched with the first conveying pipe and the second conveying pipe to be assembled, if the melt pump 5 shakes up and down, the first conveying pipe and the second conveying pipe assembled with the first installation arc block 910 can be driven to shake up and down, thereby drive sliding shell 99 and reciprocate, sliding shell 99 drives the basic block 95 and reciprocates, telescopic link two 91 is flexible, spring three 92 takes place the deformation, simultaneously telescopic link one 93 takes place to stretch out and draw back, rotate, spring two 94 takes place the deformation, under the combined action of spring two 94, spring three 92, make the basic block 95 reciprocate and keep stable, rock the effect of playing a role in the upper and lower of conveying mechanism, when melt pump 5 takes place to rock about, can drive first conveying pipeline rather than the conveying pipeline of assembly, rock about, can drive sliding block 99 and move about, sliding seat 96 plays the guide effect to the movement of sliding block 99, thereby drive rack 98 and move about, drive gear 97 takes place to rotate, gear 97 drives telescopic link one and stretches out and draws back, rotate, under the elastic action of spring two 94, move about to sliding block 99 and keep stable, rock about conveying mechanism and play stable effect, through setting up stabilizing mechanism, make melt pump 5 and conveying pipeline one, conveying pipeline two conveying pipelines of conveying pipeline two, two conveying pipeline's stability have been kept in the melt pump 5 working process, two conveying pipeline has improved, two service life.
Example 5
On the basis of embodiment 2, further comprising:
A rotation speed sensor: the rotating speed sensor is arranged on a motor connected with the screw inside the first screw extrusion device 3 and used for detecting the rotating speed of the screw in the first screw extrusion device 3;
Flow rate sensor: the flow rate sensor is arranged at the discharge port of the first screw extrusion device 3 and is used for detecting the material flow rate of the discharge port of the first screw extrusion device 3;
an alarm: the alarm is arranged outside the first screw extrusion device 3;
and (3) a controller: the controller is electrically connected with the rotating speed sensor, the flow rate sensor and the alarm;
The controller controls the alarm to work based on the detection values of the rotating speed sensor and the flow rate sensor, and the method comprises the following steps:
step 1: the controller calculates the theoretical power viscosity of the materials in the first screw extrusion equipment 3 according to the rotating speed of the screws in the first screw extrusion equipment 3 detected by the rotating speed sensor, the material flow rate of the discharge hole of the first screw extrusion equipment 3 detected by the flow rate sensor and the formula (1);
Wherein, Is the theoretical dynamic viscosity of the materials in the first screw extrusion device 3,For the consistency of the mass (in pa x S) in screw extruder one 3,For the relaxation time of the internal materials of the screw extrusion device I3 during operation,As the detection value of the rotation speed sensor,The non-Newtonian index of the internal material of the screw extrusion device I3 during operation,For the density of the material in screw extrusion device one 3,As the detection value of the flow rate sensor,The diameter of a discharge hole of the first 3 of the screw extrusion equipment;
Step 2: the controller calculates the theoretical dynamic viscosity of the material in the first screw extrusion equipment 3 and the theoretical deformation value of the screw in the first screw extrusion equipment 3 according to the formula (2), compares the calculated theoretical deformation value of the screw in the first screw extrusion equipment 3 with a preset deformation value, and controls the alarm to alarm if the calculated theoretical deformation value of the screw in the first screw extrusion equipment 3 is larger than the preset deformation value;
Wherein, The theoretical deformation value of the screw in the screw extrusion device I3,The drag coefficient of the materials in the first screw extrusion device 3,For the average diameter of the material in screw extrusion device one 3,For the rigidity of the screw in screw extrusion device one 3,The total mass of the materials in the first screw extrusion equipment 3;
wherein in the formula (1) The Reynolds number of the material in the screw extrusion device I3 during operation is the time required for the material to be deformed under stress and the material to be recovered to the normal state after the external force is relieved, the non-Newton index of the material in the screw extrusion device I3 during operation is the flow channel index of the material, and the value isLess than 1;
In the formula (2) For the theoretical collision force of the materials received by the screw rod in the screw rod extrusion equipment I3 during working, the theoretical deformation value of the screw rod in the screw rod extrusion equipment I3 is the ratio of the theoretical collision force of the materials received by the screw rod during working to the rigidity of the screw rod in the screw rod extrusion equipment I3, and if the theoretical deformation value of the screw rod in the screw rod extrusion equipment I3 is larger than the preset deformation value, the controller controls the alarm to give an alarm so as to remind a user to reduce the rotating speed of the screw rod in the screw rod extrusion equipment I3 and avoid the screw rod in the screw rod extrusion equipment I3 from being damaged.
The beneficial effects of the technical scheme are as follows:
The controller calculates the theoretical dynamic viscosity of the material in the first screw extrusion device 3 according to the rotating speed of the screw in the first screw extrusion device 3 detected by the rotating speed sensor, the material flow rate of the discharge hole of the first screw extrusion device 3 detected by the flow rate sensor and the theoretical dynamic viscosity of the material in the first screw extrusion device 3 calculated according to the step 1 and the theoretical deformation value of the screw in the first screw extrusion device 3 calculated according to the formula (2), and compares the calculated theoretical deformation value of the screw in the first screw extrusion device 3 with a preset deformation value, and if the calculated theoretical deformation value of the screw in the first screw extrusion device 3 is larger than the preset deformation value, the controller controls the alarm to alarm so as to remind a user to reduce the rotating speed of the screw in the first screw extrusion device 3 and avoid the screw in the first screw extrusion device 3 from being damaged, thereby influencing the normal use of the first screw extrusion device 3.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (7)
1. The special equipment for biodegradable micro-crosslinking foaming is characterized by comprising a stirring mechanism (1), wherein the stirring mechanism (1) is communicated with a plasticizing crosslinking mechanism through a pipeline (2), and the plasticizing crosslinking mechanism is communicated with a foaming mechanism through a material conveying mechanism;
The plasticizing crosslinking mechanism comprises screw extrusion equipment I (3) and vulcanizing equipment (4), wherein a feed inlet of the screw extrusion equipment I (3) is communicated with an outlet of the pipeline (2), a discharge outlet of the screw extrusion equipment I (3) corresponds to the feed inlet of the vulcanizing equipment (4), an inlet of the pipeline (2) is communicated with a discharge outlet of the stirring mechanism (1), and a valve (21) is arranged on the pipeline (2);
The vulcanizing device (4) is a vulcanizing oven, the screw extrusion device I (3) is a double screw extruder, the material conveying mechanism is a melt pump (5), and an inlet of the melt pump (5) is communicated with a discharge hole of the vulcanizing device (4) through a material conveying pipe I;
The special equipment for biodegradable micro-crosslinking foaming also comprises:
A rotation speed sensor: the rotating speed sensor is arranged on a motor connected with the screw inside the first screw extrusion device (3) and used for detecting the rotating speed of the screw in the first screw extrusion device (3);
Flow rate sensor: the flow rate sensor is arranged at the discharge port of the first screw extrusion device (3) and is used for detecting the material flow rate of the discharge port of the first screw extrusion device (3);
an alarm: the alarm is arranged outside the first screw extrusion device (3);
and (3) a controller: the controller is electrically connected with the rotating speed sensor, the flow rate sensor and the alarm;
The controller controls the alarm to work based on the detection values of the rotating speed sensor and the flow rate sensor, and the method comprises the following steps:
Step 1: the controller calculates the theoretical dynamic viscosity of the materials in the first screw extrusion equipment (3) according to the rotating speed of the screws in the first screw extrusion equipment (3) detected by the rotating speed sensor, the material flow rate of the discharge hole of the first screw extrusion equipment (3) detected by the flow rate sensor and the formula (1);
；
Wherein, Is the theoretical dynamic viscosity of the materials in the first screw extrusion equipment (3),For the consistency of the mass in screw extrusion device one (3),The relaxation time of the internal materials of the screw extrusion equipment I (3) when the screw extrusion equipment I works,As the detection value of the rotation speed sensor,Is the non-Newton index of the internal material of the screw extrusion device I (3) when in operation,The density of the materials in the first screw extrusion device (3),As the detection value of the flow rate sensor,The diameter of a discharge hole of the screw extrusion equipment I (3);
Step 2: the controller calculates the theoretical dynamic viscosity of the materials in the first screw extrusion equipment (3) and the theoretical deformation value of the screws in the first screw extrusion equipment (3) according to the formula (2), compares the calculated theoretical deformation value of the screws in the first screw extrusion equipment (3) with a preset deformation value, and controls the alarm to alarm if the calculated theoretical deformation value of the screws in the first screw extrusion equipment (3) is larger than the preset deformation value;
；
Wherein, Is the theoretical deformation value of the screw in the screw extrusion equipment I (3),Is the drag coefficient of the material in the first screw extrusion device (3),Is the average diameter of the materials in the first screw extrusion device (3),For the rigidity of the screw in screw extrusion apparatus one (3),The total mass of the materials in the first screw extrusion equipment 3;
the vulcanization equipment (4) is provided with a vulcanization promoting mechanism, and the vulcanization promoting mechanism comprises:
the vulcanization equipment (4) is provided with a vulcanization promoting mechanism, and the vulcanization promoting mechanism comprises:
the base (8), the inside of base (8) is fixedly equipped with motor (81), motor (81) and fixed section fixed connection of the telescopic link III (89), the movable section of telescopic link III (89) is fixedly connected with mounting shell (811);
the two grooves (82) are symmetrically arranged at the left side and the right side of the upper end of the base (8), lifting sleeves (84) are slidably arranged in the grooves (82), and springs five (83) are fixedly arranged between the lifting sleeves (84) and the grooves (82);
the rotating block (87), the fixed section of the rotating block (87) and the telescopic rod III (89) are fixedly connected, an arc-shaped groove (88) is arranged outside the rotating block (87), the arc-shaped groove (88) is in sliding connection with a connecting shaft (86), the connecting shaft (86) is in rotary connection with the horizontal end of the L-shaped rod (85), and the vertical end of the L-shaped rod (85) is fixedly connected with the lifting sleeve (84);
The supporting plate (810), the supporting plate (810) is fixedly arranged at the lower end of the mounting shell (811), a through hole for the movable section of the telescopic rod III (89) to pass through is formed in the middle of the supporting plate (810), the supporting plate (810) is fixedly connected with the connecting cavity inside the lifting sleeve (84), the mounting shell 811 is rotationally connected with the connecting cavity inside the lifting sleeve (84), and one end, far away from the mounting shell (811), of the supporting plate (810) is fixedly connected with the vertical end of the L-shaped rod (85);
The two fixing plates (813) are symmetrically arranged on the left side and the right side of the upper end of the base (8), one end, far away from the base (8), of the fixing plate (813) is provided with a guide sleeve (814), and the upper end and the lower end of the guide sleeve (814) are provided with guide cavities (815) in a penetrating mode;
The fixing sleeve (816), the upper and lower both ends of the fixing sleeve (816) are penetrated and provided with fixing cavities (819), the fixing cavities (819) are fixedly connected with the vulcanizing equipment (4), the vulcanizing equipment (4) is arranged between the upper and lower both ends of the cavity (812) in the installation shell (811) in a sliding manner, and a spring six (820) is fixedly arranged between the vulcanizing equipment (4) and the right end of the cavity (812);
The two first connecting rods (817) are symmetrically arranged at the front end and the rear end of the fixed sleeve (816), the first connecting rods (817) penetrate through the side ends of the fixed cavity (819) to be rotationally connected with the guide balls (818), and the guide balls (818) are matched with the guide cavity (815).
2. The special biodegradable micro-crosslinking foaming device according to claim 1, wherein the foaming mechanism comprises a second screw extrusion device (6) and an underwater pelletizer (7), a feed inlet of the second screw extrusion device (6) is communicated with an outlet of the melt pump (5) through a second conveying pipe (51), and a discharge outlet of the second screw extrusion device (6) is communicated with a feed inlet of the underwater pelletizer (7).
3. The special biodegradable micro-crosslinking foaming device according to claim 2, wherein the second screw extrusion device (6) is a single screw extruder, a plurality of air inlet pipes (62) are further arranged at the side ends of the second screw extrusion device (6), the plurality of air inlet pipes (62) are communicated with the inner cavity of the second screw extrusion device (6), and a medium layer (61) is arranged in the inner cavity of the second screw extrusion device (6).
4. The special biodegradable micro-crosslinking foaming device according to claim 1, characterized in that the interface flange of the melt pump (5) is provided with a stabilizing mechanism comprising:
The lower end of the base block (95) is fixedly connected with the movable end of the telescopic rod II (91), the movable end of the telescopic rod II (91) is sleeved with a spring I (92), gears (97) are symmetrically arranged at the front end and the rear end of the base block (95), the left side and the right side of the gears (97) are hinged with the movable end of the telescopic rod I (93), and the movable end of the telescopic rod I (93) is sleeved with a spring II (94);
the left side and the right side of the upper end of the bottom plate (9) are respectively hinged with the fixed end of the first telescopic rod (93), and the middle part of the upper end of the bottom plate (9) is fixedly connected with the fixed end of the second telescopic rod (91);
The two sliding seats (96) are symmetrically arranged at the left side and the right side of the upper end of the base block (95);
The sliding mechanism comprises two sliding shells (99), wherein the two sliding shells (99) are respectively and slidably connected with a sliding seat (96), a rack (98) is fixedly connected between the lower sides of the two sliding shells (99), the rack (98) is meshed with a gear (97), a movable cavity (918) is arranged in the upper side of the sliding shells (99), movable holes (928) are communicated with the front side and the rear side of one end, close to the rack (98), of the movable cavity (918), the movable holes (928) are communicated with the outside through sliding holes (925), and the sliding holes (925) are arranged at the front end and the rear end of the upper side of the sliding shells (99) in a penetrating mode;
The two sliding plates (919), the two sliding plates (919) are respectively arranged in the movable cavity (918) in the two sliding shells (99) in a sliding way, one end of the sliding plate (919) is fixedly connected with the threaded rod (916), the threaded rod (916) is in threaded connection with the threaded sleeve (915), the threaded sleeve (915) penetrates through one end, far away from the rack (98), of the movable cavity (918) and is fixedly connected with an external operation block (914), and the threaded sleeve (915) is in rotary connection with one end, far away from the rack (98), of the movable cavity (918);
The first matching block (920) is fixedly connected with one end, far away from the threaded rod (916), of the two sliding plates (919), the front side and the rear side of the first matching block (920) are in sliding connection with the second matching block (921), and the second matching block (921) is in sliding connection with one end, close to the rack (98), of the movable cavity (918);
The four L-shaped blocks (922), two by two, are connected with the sliding shells (99) on the left side and the right side respectively, the vertical ends of the L-shaped blocks (922) are connected with the sliding holes (925) in a sliding mode, the horizontal ends of the L-shaped blocks (922) are fixedly connected with the second connecting rods (923), the second connecting rods (923) penetrate through the side ends of the sliding shells (99) to enter the movable cavities (918), the second connecting rods (923) are fixedly connected with the matching blocks (921), springs III (924) are fixedly arranged between the horizontal ends of the L-shaped blocks (922) and the side ends of the sliding shells (99), and the springs III (924) are sleeved on the second connecting rods (923);
the four contact blocks (926), the four contact blocks (926) are respectively connected with the movable holes (928) on the two sliding shells (99) in a sliding manner, the contact blocks (926) are fixedly connected with the fixed rods (927), and the fixed rods (927) penetrate through the side ends of the movable holes (928) to be communicated with the outside;
The two mounting arc blocks I (910), the front side and the rear side of one end of the two mounting arc blocks I (910) which are far away from each other are fixedly connected with an external fixed rod (927), one end of the two mounting arc blocks I (910) which are close to each other is provided with a mounting groove I, the mounting groove I is externally meshed with an interface flange of the melt pump (5), the front end and the rear end of the mounting arc blocks I (910) are provided with mounting arc blocks II (911), one ends of the mounting arc blocks II (911) on the left side and the right side which are close to each other are provided with mounting grooves II, and the mounting grooves II are externally meshed with the melt pump (5);
A spring IV (917) is fixedly arranged between the first installation arc block (910) and the sliding shell (99);
The sealing grooves (912) are symmetrically arranged on the first two sides of one end of the first installation arc block (910) close to each other, the sealing grooves (912) on the first installation arc block (910) on the left side and the right side are correspondingly arranged, and sealing strips (913) are arranged between the sealing grooves (912) on the left side and the right side.
5. A biodegradable micro-crosslinking foaming process, which adopts the special biodegradable micro-crosslinking foaming equipment as set forth in any one of claims 1-4, and is characterized by comprising the following steps:
Step 1: adding a certain amount of SEBS material and biodegradable polyol ester into a stirring mechanism (1), mixing, and standing for a period of time after the mixing is finished;
step 2: after a period of time, adding a certain amount of PBAT material, compatilizer and cross-linking agent into the stirring mechanism (1) continuously, and stirring continuously;
step 3: the mixed material after the stirring is fed into a plasticizing crosslinking mechanism through a pipeline (2), and the mixed material is subjected to plasticizing and vulcanization steps in sequence;
in the plasticizing crosslinking mechanism, when the vulcanizing mechanism is promoted to work, a conveying pipe I connected with a discharge hole of the vulcanizing equipment (4) is detached, the upper end and the lower end of a guide sleeve (814) are penetrated and provided with guide cavities (815), normal feeding of the vulcanizing oven is guaranteed, a motor (81) is started, the motor (81) drives a telescopic rod III (89) to rotate, the telescopic rod III (89) drives a rotating block (87) and a mounting shell (811) to rotate, a movable cavity of the lifting sleeve (84) plays a guide role on the rotation of the mounting shell (811), the mounting shell (811) rotates to drive the vulcanizing equipment (4) to rotate, the rotating block (87) rotates to drive a connecting shaft (86) to slide along an arc groove (88), so that an L-shaped rod (85) is driven to move up and down, the supporting plate (810) is driven to move up and down, the lifting sleeve (84) is driven to move up and down by a spring five (83), the lifting sleeve (84) is driven to move up and down together, the lifting sleeve (84) and the supporting plate (811) are driven to move up and down, the connecting rod (816) is driven to move up and down, and the connecting rod (816) is driven to move up and down, the guide ball (818) is matched with the guide cavity (815) so as to drive the fixed sleeve (816) to move left and right, the fixed sleeve (816) drives the vulcanizing device (4) to slide left and right, a stable effect is achieved on the sliding of the vulcanizing device (4) by arranging the spring six (820), and when the vulcanizing mechanism is promoted to work, the vulcanizing device (4) is enabled to move up and down and left and right while rotating, so that the mixing uniformity of materials in the vulcanizing device (4) can be effectively improved, and the vulcanizing effect of the materials in the vulcanizing device (4) is improved;
When the screw extrusion equipment I (3) of the plasticizing crosslinking mechanism works, the controller calculates the theoretical dynamic viscosity of the materials in the screw extrusion equipment I (3) according to the rotating speed of the screw in the screw extrusion equipment I (3) detected by the rotating speed sensor, the material flow speed of the discharge hole of the screw extrusion equipment I (3) detected by the flow speed sensor and the theoretical dynamic viscosity of the materials in the screw extrusion equipment I (3) calculated according to the formula (1), then calculates the theoretical deformation value of the screw in the screw extrusion equipment I (3) according to the theoretical dynamic viscosity of the materials in the formula (2), and compares the calculated theoretical deformation value of the screw in the screw extrusion equipment I (3) with a preset deformation value, if the calculated theoretical deformation value of the screw in the screw extrusion equipment I (3) is larger than the preset deformation value, the controller controls the alarm to alarm, so that a user can reduce the rotating speed of the screw in the screw extrusion equipment I (3) and avoid the screw in the screw extrusion equipment I (3) from being damaged, thereby influencing the normal use of the screw extrusion equipment I (3);
step 4: starting a material conveying mechanism, and conveying the mixed material after the vulcanization step into a foaming mechanism for foaming.
6. The biodegradable micro-crosslinking foaming process according to claim 5, characterized in that: in the step 1, the quantity of the SEBS material is 10-20 parts, and the quantity of the biodegradable polyol ester is 5-25 parts; the quantity of the PBAT material in the step 2 is 50-70 parts, the quantity of the compatilizer is 5-15 parts, and the quantity of the cross-linking agent is 0.1% -0.5% of the total weight of the SEBS material, the biodegradable polyol ester, the PBAT material and the compatilizer.
7. The biodegradable micro-crosslinking foaming process according to claim 5, characterized in that: in the step 3, when the mixed material enters a plasticizing crosslinking mechanism, the mixed material firstly enters a first screw extrusion device (3) for plasticizing and extruding, the first screw extrusion device (3) sends the plasticized mixed material into a vulcanization oven for vulcanization, the mixed material after the vulcanization in the step 4 firstly enters a second screw extrusion device (6) for foaming and extruding, and the second screw extrusion device (6) finally sends the mixed material into an underwater pelletizer for pelleting.
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| CN202211008474.1A CN115122563B (en) | 2022-08-22 | 2022-08-22 | Special equipment and process for biodegradation micro-crosslinking foaming |
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