CN211762983U - High-efficient plastify of material is extruded foaming system - Google Patents
High-efficient plastify of material is extruded foaming system Download PDFInfo
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- CN211762983U CN211762983U CN202020121042.1U CN202020121042U CN211762983U CN 211762983 U CN211762983 U CN 211762983U CN 202020121042 U CN202020121042 U CN 202020121042U CN 211762983 U CN211762983 U CN 211762983U
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Abstract
The utility model discloses a foaming system is extruded in high-efficient plastify of material, including plastify station, mixing station, its characterized in that the plastify station sets to the high-speed rotatory material plasticator that has the rotatory collision structure of non-pressure formula, and the export of high-speed rotatory material plasticator is provided with the parallel twin-screw mixed cooling device who is used for the mixed material of low-temperature cooling, the beneficial effects of the utility model are that: the high-speed rotating material plasticator with a non-pressure type rotating collision structure is creatively designed, so that secondary feeding becomes possible; and in the plasticizing process, a flame retardant is not added, the material is cooled in the parallel double screws, the flame retardant does not pass through high temperature and is not decomposed, the flame retardant effect is good, and raw materials are saved.
Description
The technical field is as follows:
the utility model belongs to the technical field of the polymer plastify, more specifically relates to a foaming system is extruded in high-efficient plastify of material.
Background art:
at present, international large-scale extrusion foaming equipment is expensive, occupies a large area and consumes high energy; the domestic maximum extrusion foaming equipment is about 1000 KG/h, the raw materials are slowly melted, the production efficiency is low, and the material extrusion plasticizing is mostly used.
Wherein the PVC material extrusion plasticizing mechanism is as follows: according to three-section plasticizing process of PVC materials in a cylinder of a double-screw extruder, a screw is divided into three areas: a solids conveying zone, a melting zone, a melt conveying (extrusion) zone.
1. Solid conveying zone plasticizing mechanism
The flow, preheating and compacting zones of the solid Polymer (PVC) and its adjuvants are defined as the solid conveying zones in the barrel. First, the flow of the solid polymer particles in the hopper into the barrel is achieved by gravity, and the particles are propelled in the direction of the head of the screw as the screw rotates, while the particles in the hopper are continuously flowing. The particles of high molecules, small molecules and the like in the PVC material in the solid conveying zone (barrel C1 zone) are gradually heated, and meanwhile, the heat of the particles is increased by the screw shearing action and the friction among the particles, so that the particles are fully contacted, diffused and permeated in a compact state.
In this region, the particles of PVC material are densely compacted to form a solid bed or plug sliding on the screw channel as a result of changes in the pitch, flight width, etc. of the screw. The solid plug movement is due to friction between the barrel surface and the solid plug, while friction between the screw and the solid plug prevents the solid plug from moving. Therefore, in the machine barrel, PVC material particles do not move forward in the same direction, but roll and slip occasionally, rotate along with the screw rod, and are stacked after the bridge to break through the bridge, and the process is repeated along with the extrusion of the PVC material and the flow of the PVC material in the hopper.
In the area, the better PVC material extrusion plasticizing quality is that PVC is converted from a glass state to a high-elastic state from the aspect of state; from the aggregate structure, 50 to 60 percent of PVC resin particles are broken into primary particles, and the surfaces of various auxiliary agent particles are fully contacted and diffused with the primary particles.
It is worth pointing out that: for stable operation, the height of the solid material in the hopper must be above a certain critical value at all times. Above this critical value, changes in the level will not affect the performance of the extruder, but become a strong factor of instability if the level is below the critical value. The change of the solid material level can cause the change of the bottom pressure, change the running condition of the extruder and cause the deterioration of the extrusion plasticizing quality of the PVC material.
2. Mechanism of melting zone plasticization
In the barrel, a region where the solid polymer and the melt coexist is defined as a melting region or a phase transition region. This zone is a C2, C3 heating zone. The melting zone is the main part of the extruder, and especially the setting of the temperature (the cylinder C2 zone, the C3 zone, the screw core) and the setting of the screw rotating speed, the clearance between the screw and the screw, the clearance between the screw and the cylinder and the like have important influence on the extrusion quality of the PVC material. When the PVC material reaches the melting zone, as the pitch of the screw, the width of the screw flight, etc. change, the particles of PVC material, while being compacted, have developed considerable pressures which, together with the softening action of the surrounding thermal medium, turn the compacted particles into a compact "solid bed". The solid bed is a mixture of a part of PVC high elastic state, a part of PVC glass state and a small amount of PVC viscous state. The solid bed has the shape of a helical spiral and slides within the spiral. Due to this relative movement, a velocity profile is created in the melt film between the solid bed and the barrel surface. The melt in the melt film then begins to flow as it advances toward the flight, and as it encounters the flight, the flight "scrapes" the melt from the barrel and collects in the pool behind the flight in front of the advancing flight. As the solid bed moves along the channel, more and more melt is carried into the molten bath, and thus the size of the bath increases while the size of the solid bed decreases. The solid bed is gradually destroyed and transported forward in the viscous state.
In the area, the extrusion plasticizing quality of the PVC material is better, and the PVC is converted into a viscous flow state from a high elastic state in terms of state; from the view of an aggregation state structure, 60-70% of PVC primary particles are crushed and changed into primary particles, and various auxiliary agent molecules are contacted with the PVC primary particles to form physical and chemical combination.
In the melting zone, the factors for improving the extrusion plasticizing quality of the PVC material are as follows:
(1) increasing the screw rotation speed (2) and increasing the set temperature of the melting zone cylinder (3) and for a specific PVC profile production formula, a group of optimal melting zone cylinder temperatures should exist in a proper screw and cylinder gap.
3. Mechanism of plasticization in the melt conveying zone
In the barrel, the solid polymer was completely converted into a melt, and the portion of the melt that was forcibly conveyed to the head was defined as a melt conveying zone (barrel C4 heating zone). In the region, the molten macromolecules react with various auxiliary agents under the action of shearing, and the primary particles and a small amount of primary particles form crystals together, so that the strength and the toughness of the final material can be improved. After the crystal material is extruded and cooled, the primary particles can block the movement of the primary particles under the action of external force, so that the strength is improved; and the primary particles have large surface area, so that part of impact energy can be absorbed when the impact is applied, and the toughness is improved.
Due to the limitation of the method in principle, the method has certain disadvantages, such as low production efficiency, poor flame retardant effect, low utilization efficiency of the flame retardant, poor cooling efficiency and insufficient quality of the finished product.
The invention content is as follows:
for solving the problem, overcome the not enough of prior art, the utility model provides a production efficiency is high, the fire retardant utilization efficiency is high, and cooling efficiency is high, and foaming system and method are extruded in the high-efficient plastify of material that the finished product quality is good, can effectually solve that production efficiency is low, flame retardant efficiency is relatively poor, and the fire retardant utilization efficiency is lower, and cooling efficiency is poor, the not enough problem of finished product quality.
The utility model provides a concrete technical scheme of above-mentioned technical problem does: foaming system is extruded in high-efficient plastify of material, including plastify station, mixing station, its characterized in that the plastify station sets to the high-speed rotatory material plasticator that has the rotatory collision structure of non-pressure formula, and the export of high-speed rotatory material plasticator is provided with the parallel twin-screw hybrid cooling device who is used for the mixed material of low-temperature cooling, and parallel twin-screw hybrid cooling device's import department still is provided with foamer injection device, and parallel twin-screw hybrid cooling device's export is provided with high-efficient hybrid cooling device through trading net ware 7.
Further, high-speed rotatory material plasticator include hollow organism, one side of organism is provided with transmission structure, one side of transmission structure is provided with the high-speed motor that the rotational speed is 2000-6000 revolutions per minute, high-speed motor's output links to each other with transmission structure, transmission structure's the other end is connected with the transmission shaft of wearing to establish at the organism axle center, and the transmission shaft sets a plurality of sections, including setting up the transportation thread section in transmission shaft one end, the collision melting section of predetermineeing quantity, perforated plate and regular thread section II, the perforated plate cover is established in the transmission shaft outside that is located reverse thread section exit end, collision melting section comprises regular thread section I and reverse thread section, the pitch of regular thread section I is greater than the pitch of reverse thread section.
Furthermore, the high-frequency heater for heating is arranged on the outer side of the machine body of the high-speed rotating material plasticizing machine, and the discharge hole is formed in the bottom of one side of the machine body.
Further, the parallel double-screw mixing and cooling device is provided with parallel double screws for efficient conveying, stirring, mixing and primary cooling; the model of the parallel twin screws is any one of 75 type, 86 type, 95 type, 110 type or 135 type.
Further, the high-efficiency mixing and cooling device comprises a static mixer, a dynamic mixer and a single-screw extruder, wherein the single-screw extruder is any one of a 200 type, a 250 type, a 300 type, a 400 type and a 500 type.
A method for using a material efficient plasticizing extrusion foaming system is characterized in that materials are placed into a high-speed rotating material plasticizing machine, the materials collide with each other at high speed to generate heat energy to melt the materials instantly, the plasticized materials are conveyed to a parallel double-screw mixing and cooling device, a foaming agent is injected by a foaming agent injection device, the materials are efficiently conveyed, stirred, mixed and initially cooled through the parallel double screws, the initially cooled materials enter the efficient mixing and cooling device through a screen changer to be mixed and cooled, and the efficient mixing and cooling device comprises a static mixer, a dynamic mixer and a single-screw extruder; and (4) releasing the pressure of the cooled and mixed material through a machine head die to foam the material to form a foamed product.
Further, the material is any one of PS, PE, PLA or PET.
Further, the foaming agent is any one of CO2, alcohol, Freon and butane.
Further, the foamed product is any one of a foamed plate or sheet or a pipe or a profile.
The utility model has the advantages that: the utility model solves the problem of poor flame retardant effect of the product produced by the traditional plasticizing extrusion equipment,
the high-speed rotating material plasticizing machine with a non-pressure type rotating collision structure is creatively designed to replace the traditional high-pressure screw rod heating and melting, so that secondary feeding becomes possible;
the method avoids the problems that the existing foaming equipment has large shearing heat, high temperature and serious decomposition of the flame retardant in the raw material plasticizing process, reduces the flame retardant effect, increases the using amount of the flame retardant, does not add the flame retardant in the plasticizing process by utilizing a high-speed rotating material plasticizing machine, but adds the powdery flame retardant when the material enters parallel double screws after being plasticized, cools the material in the parallel double screws, does not pass through high temperature and is not decomposed, has good flame retardant effect and saves the raw material;
the parallel double-screw mixing and cooling device is not in charge of plasticizing the material, utilizes the super mixing capability of the parallel double-screw mixing and cooling device to promote the material to be mixed with the foaming agent, cools the material, and then enters a three-stage high-efficiency mixing and cooling device for mixing and cooling, so that the cooling capability is doubled, and the foaming yield of equipment with the same specification is also doubled.
Description of the drawings:
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a schematic view of the high-efficiency mixing and cooling device of the present invention; in the drawings:
1. the device comprises a plasticizing station 2, a parallel double-screw mixing and cooling device 3, an efficient mixing and cooling device 4, a cooler 5, a machine head die 6, an auxiliary machine 7, a screen changer 8, a foaming agent injection device 11, a high-speed motor 12, a transmission structure 13, a feeding hole 14, a positive thread section I, a positive thread section 15, a negative thread section 16, a high-frequency heater 17, a heat preservation cylinder 18, a discharging hole 19, a positive thread section II, a positive thread section 20, a porous plate 21 and a conveying thread section.
The specific implementation mode is as follows:
specific details are set forth in the description of the invention only to provide a thorough understanding of the embodiments of the invention, but as one skilled in the art will appreciate, the practice of the invention is not limited to these details. In other instances, well-known structures and functions have not been described or shown in detail to avoid obscuring the points of the embodiments of the present invention. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model discloses a concrete implementation mode: foaming system is extruded in high-efficient plastify of material, including plastify station 1, mixing station, its characterized in that plastify station 1 sets to the high-speed rotatory material plasticator that has the rotatory collision structure of non-pressure formula, high-speed rotatory material plasticator includes hollow organism, one side of organism is provided with drive structure 12, one side of drive structure 12 is provided with the high-speed motor 11 that the rotational speed is 2000-6000 revolutions/minute, high-speed motor 11's output links to each other with drive structure 12, the other end of drive structure 12 is connected with the transmission shaft of wearing to establish at the organism axle center, the transmission shaft sets up a plurality of sections, including the transportation screw thread section 21 that sets up in transmission shaft one end, the collision melting section of predetermineeing quantity, porous plate 20 and regular thread section II 19, porous plate 20 cover is established in the transmission shaft outside that is located reverse thread section 15 exit ends, the collision melting, the screw pitch of the positive thread section I14 is larger than that of the negative thread section 15, a high-frequency heater 16 for heating is arranged on the outer side of a machine body of the high-speed rotating material plasticizing machine, and a discharge hole 18 is formed in the bottom of one side of the machine body;
the outlet of the high-speed rotating material plasticizing machine is provided with a parallel double-screw mixing and cooling device 2 for cryogenically cooling the mixed material, the inlet of the parallel double-screw mixing and cooling device 2 is also provided with a foaming agent injection device 8, and the outlet of the parallel double-screw mixing and cooling device 2 is provided with a high-efficiency mixing and cooling device 3 through a screen changer 7;
the parallel double-screw mixing and cooling device 2 is provided with parallel double screws for efficient conveying, stirring, mixing and primary cooling; the model of the parallel twin-screw is any one of 75 type, 86 type, 95 type, 110 type or 135 type;
the high-efficiency mixing and cooling device 3 comprises a static mixer, a dynamic mixer and a single-screw extruder, wherein the model of the single-screw extruder is any one of 200 type, 250 type, 300 type, 400 type and 500 type
A material high-efficiency plasticizing extrusion foaming system using method, putting the material into a high-speed rotating material plasticizing machine, the material is any one of PS or PE or PLA or PET, rotating the material at high speed to mutually collide to generate heat energy, instantly melting the material, conveying the plasticized material to a parallel double-screw mixing cooling device 2, and injecting a foaming agent into a foaming agent injection device 8, wherein the foaming agent is any one of CO2 or alcohol or Freon or butane; the materials after primary cooling enter a high-efficiency mixing and cooling device 3 for mixing and cooling through a net changer 7 by virtue of high-efficiency conveying, stirring, mixing and primary cooling of parallel double screws, wherein the high-efficiency mixing and cooling device 3 comprises a static mixer, a dynamic mixer and a single-screw extruder; the cooled and mixed materials are released by a machine head die 5 to be foamed into a foamed product, and the foamed product is any one of a foamed plate, a sheet, a pipe or a section.
In order to more intuitively show the process advantages of the using method of the high-efficiency material plasticizing extrusion foaming system of the utility model,
when in use, the method comprises the following specific operations:
the high-speed rotatory material plasticator 1 of no pressure formula rotatory collision structure is put into to material PS, PE, PLA, PET etc to high-speed rotatory material collides each other, produces heat energy, melts the material in the twinkling of an eye, because the material melting time is short, and thermal decomposition is few, and the material can keep good physical properties, and the device plastify can the reinforce, can reach 1000 KG-3000 KG per hour. The plasticized material is conveyed to a parallel double-screw mixing and cooling device 2, and a foaming agent CO2, alcohol, Freon, butane and the like are injected by a foaming agent injection device 8, and are efficiently conveyed, stirred, mixed and primarily cooled by parallel double screws, wherein the specifications of the parallel double screws comprise 75, 86, 95, 110, 135 and the like. The material after the preliminary cooling enters the high-efficiency mixing and cooling device 3 through the screen changer 7 to be mixed and cooled, and the high-efficiency mixing and cooling device 3 comprises a static mixer; a dynamic mixer; 200. 250, 300, 400, 500 single screw extruders, and the like. The cooled and mixed materials are decompressed and foamed by a machine head mould 5 to form a foamed product. The foamed article may be a foamed board, sheet, tube, profile, or the like. The device can be used for producing high-quality foaming product films, sheets, pipes, rods, profiles and the like. The product has excellent high impact resistance and high heat insulation performance, is widely applied to various fields such as catering, packaging, medical treatment and the like, and has wide application prospect.
At the moment, a, the high-speed plasticizing device rotates materials at a high speed to mutually collide to generate heat energy to melt the materials instantly, the materials can keep good physical properties due to short melting time and less thermal decomposition, the device has strong plasticizing capacity which can reach 1000 KG-3000 KG per hour, the device has small volume which is about equal to 1/3 of a plasticizing output device and has no pressure, and a high-speed rotating material plasticizing machine with a non-pressure type rotating collision structure is used for replacing a high-pressure screw of a traditional melting zone, so that secondary feeding becomes possible;
b. the second-level parallel double screws of the screw do not undertake the task of plasticizing the material, the material is promoted to be mixed with the foaming agent by utilizing the super mixing capability of the second-level parallel double screws, the material is cooled, and then the material enters a third-level efficient mixing and cooling device to be mixed and cooled, so that the cooling capability is doubled, and the foaming yield of equipment with the same specification is doubled;
c. aiming at the problems that in the plasticizing process of raw materials of domestic foaming equipment, the shearing heat is large, the temperature is high, the flame retardant is seriously decomposed, the flame retardant effect is reduced, and only the using amount of the flame retardant can be increased, at the moment, the flame retardant is creatively not added in the plasticizing process, the powdery flame retardant is added when the materials enter parallel double screws after being plasticized, the materials are cooled in the parallel double screws, the flame retardant does not pass through high temperature and is not decomposed, the flame retardant effect is good, the raw materials are saved, 10 yuan of flame retardant is saved for every cubic foaming product, the foaming product is foamed according to the minimum amount of 700 yuan a day, and the using amount of 7000 yuan of.
In summary, the following steps: the utility model solves the problem of poor flame retardant effect of the product produced by the traditional plasticizing extrusion equipment,
the high-speed rotating material plasticizing machine with a non-pressure type rotating collision structure is creatively designed to replace the traditional high-pressure screw rod heating and melting, so that secondary feeding becomes possible;
the method avoids the problems that the existing foaming equipment has large shearing heat, high temperature and serious decomposition of the flame retardant in the raw material plasticizing process, reduces the flame retardant effect, increases the using amount of the flame retardant, does not add the flame retardant in the plasticizing process by utilizing a high-speed rotating material plasticizing machine, but adds the powdery flame retardant when the material enters parallel double screws after being plasticized, cools the material in the parallel double screws, does not pass through high temperature and is not decomposed, has good flame retardant effect and saves the raw material;
the parallel double-screw mixing and cooling device is not in charge of the task of plasticizing the material, the material is mixed with the foaming agent by utilizing the super mixing capability of the parallel double-screw mixing and cooling device, the material is cooled, and then the material enters the three-stage high-efficiency mixing and cooling device for mixing and cooling, so that the cooling capability is doubled, and the foaming yield of equipment with the same specification is also doubled.
Claims (5)
1. The utility model provides a foaming system is extruded in high-efficient plastify of material, includes plastify station (1), mixing station, its characterized in that plastify station (1) set to the high-speed rotatory material plasticator that has the rotatory collision structure of non-pressure formula, the export of high-speed rotatory material plasticator is provided with parallel twin-screw hybrid cooling device (2) that are used for the mixed material of low-temperature cooling, and the import department of parallel twin-screw hybrid cooling device (2) still is provided with foamer injection device (8), and the export of parallel twin-screw hybrid cooling device (2) is provided with high-efficient hybrid cooling device (3) through trading net ware (7).
2. The efficient material plasticizing, extruding and foaming system according to claim 1, wherein the high-speed rotating material plasticizing machine comprises a hollow machine body, a transmission structure (12) is arranged on one side of the machine body, a high-speed motor (11) with a rotation speed of 2000-6000 rpm is arranged on one side of the transmission structure (12), an output end of the high-speed motor (11) is connected with the transmission structure (12), the other end of the transmission structure (12) is connected with a transmission shaft penetrating through the axis of the machine body, the transmission shaft is provided with a plurality of sections, and comprises a transmission thread section (21) arranged at one end of the transmission shaft, a preset number of collision melting sections, a porous plate (20) and a positive thread section II (19), the porous plate (20) is sleeved on the outer side of the transmission shaft at the outlet end of the negative thread section (15), and the collision melting section consists of the positive thread section I (14, the screw pitch of the positive thread section I (14) is larger than that of the negative thread section (15).
3. The material efficient plasticizing extrusion foaming system of claim 1, characterized in that the high-frequency heater (16) for heating is arranged outside the body of the high-speed rotating material plasticizing machine, and the discharge hole (18) is arranged at the bottom of one side of the body.
4. The efficient material plasticizing extrusion foaming system according to the claim 1, characterized in that the parallel twin-screw mixing and cooling device (2) is configured as parallel twin-screws for efficient transportation, stirring, mixing and primary cooling; the model of the parallel twin screws is any one of 75 type, 86 type, 95 type, 110 type or 135 type.
5. The material high-efficiency plasticizing extrusion foaming system according to the claim 1, characterized in that the high-efficiency mixing cooling device (3) comprises a static mixer, a dynamic mixer and a single-screw extruder, and the model of the single-screw extruder is any one of the model 200, the model 250, the model 300, the model 400 and the model 500.
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| CN202020121042.1U CN211762983U (en) | 2020-01-19 | 2020-01-19 | High-efficient plastify of material is extruded foaming system |
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| CN202020121042.1U CN211762983U (en) | 2020-01-19 | 2020-01-19 | High-efficient plastify of material is extruded foaming system |
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