Granulation-free high-mixing and extrusion integrated production equipment for hollow plate

Abstract

The utility model discloses granulation-free high-mixing and extrusion integrated production equipment for a hollow plate, which comprises an automatic metering and batching system, a powder fluidization modification system connected with the automatic metering and batching system and used for surface modification, and a gradient uniform mixing system connected with the powder fluidization modification system and used for high mixing, the gradient uniform mixing system comprises a high-torque double-screw extruder with a side feeding port, polyolefin resin is fed into the high-torque double-screw extruder through a micro-screw machine feeding device by the side feeding port, and the gradient uniform mixing system further comprises an extrusion molding system and a slitting system for cooling and cutting molded sheet plates. According to the utility model, the original process of firstly carrying out melting granulation and then carrying out extrusion molding to obtain sheet plates is integrated into one double-screw high mixing-extrusion integration, high dispersion among raw materials is realized through gradient mixing and polyolefin melt state feeding, the effect of integrated continuous production is achieved, the production efficiency is high, the energy consumption is low, and the production cost is low. And the stability of the product performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hollow board production, in particular to granulation-free high-mixing and extrusion integrated production equipment for hollow boards. Background Art

[0002] Hollow board, also called Wantong board or honeycomb board, is a new type of sheet material with a hollow structure. It has the advantages of light weight, non-toxic, pollution-free, waterproof, shockproof, anti-aging, corrosion-resistant and rich colors. It is widely used in the field of logistics packaging materials. The production of hollow board mainly uses polyolefin as raw material, supplemented with high content of inorganic fillers, ultraviolet absorbers, antioxidants, lubricants and dispersants and other processing aids for extrusion molding. Among them, the inorganic filler is usually calcium carbonate powder. The addition of calcium carbonate can improve the strength of the hollow board and effectively reduce the production cost of the hollow board. In the hollow board industry, the addition of calcium carbonate is as high as 50-80%. Therefore, in the processing of hollow board, the uniform dispersion of inorganic fillers in the matrix resin, i.e. polyolefin, is very important.

[0003] Patent CN201010018106.6 discloses a PC hollow board production line, which includes: a drying and discharging device, an extruder arranged at the outlet end of the drying and discharging device for melting solid granular PC raw materials into colloidal output, a metering pump arranged at the end of the extruder for quantitatively outputting the colloidal PC raw materials, a forming mold for generating hollow boards arranged at the output end of the metering pump, a first tractor arranged at the output end of the forming mold, a cutting device arranged at the output end of the first tractor, a tempering furnace arranged at the output end of the cutting device for heating the hollow board, and an upper laminating device and a lower laminating device arranged at the output end of the tempering furnace; the PC hollow board production line of the patent has a simple structure, a high degree of automation, and high product quality.

[0004] Existing hollow board extrusion production equipment is usually a separate extrusion molding equipment, and the mixing uniformity is poor. In order to solve this problem, in actual production, the granulated hollow board special masterbatch is usually used as the raw material for extrusion production. For example, in the above-mentioned patent, the extruder melts the PC raw material that is already in solid granular form into a colloidal output, which is not conducive to the continuity of production, and has low production efficiency and high cost. In addition, in the granulation-free production process of hollow boards, there are a large number of active hydroxyl groups on the surface of inorganic fillers such as calcium carbonate powder, which have poor compatibility with non-polar polyolefin resins. The strong polar interaction makes the calcium carbonate powder very easy to agglomerate into a mass during the processing. The poor uniformity will cause the material to fail to meet the relevant performance requirements. Based on the problem that the high content of inorganic fillers in the preparation process of hollow boards needs to be highly evenly dispersed, it is difficult to achieve the requirements only by simple blending. It is necessary to use additives to modify the surface of the inorganic filler and use a more sufficient mixing method to evenly fill the inorganic filler into the polyolefin resin. Utility Model Content

[0005] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a granulation-free high-mixing extrusion integrated production equipment for hollow plates that can achieve integrated continuous production, high production efficiency, low energy consumption and improve product performance stability.

[0006] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0007] A granulation-free high-mixing extrusion integrated production equipment for hollow plates, comprising an automatic metering and batching system, a powder fluidization modification system connected to the automatic metering and batching system and used for surface modification of inorganic fillers, and a gradient uniform mixing system connected to the powder fluidization modification system and used for high mixing;

[0008] The automatic metering and batching system includes a storage bin with partitions, a micro screw machine feeding device and a weightless metering feeder connected to the gradient uniform mixing system, a first vacuum suction hopper for sucking inorganic fillers, a second vacuum suction hopper for sucking additives, a third vacuum suction hopper for sucking polyolefin resin, and corresponding vacuum pipelines;

[0009] The gradient uniform mixing system comprises a high torque twin-screw extruder with a plurality of side feeding ports, wherein the side feeding ports are respectively equipped with a micro screw machine feeding device for feeding polyolefin resin and a weightless metering feeder for feeding activated powder. The interior of the high torque twin-screw extruder is divided into 12 temperature sections, which are the first temperature section to the twelfth temperature section from left to right, and the temperature of the first temperature section is 130°C-140°C, and the temperature of the second temperature section is 140°C- The temperature of the third temperature zone is 150℃-160℃, the temperature of the fourth temperature zone is 160℃-170℃, the temperature of the fifth temperature zone is 170℃-180℃, the temperature of the sixth temperature zone is 180℃-190℃, the temperature of the seventh temperature zone is 185℃-195℃, the temperature of the eighth temperature zone is 185℃-195℃, the temperature of the ninth temperature zone is 195℃-205℃, the temperature of the tenth temperature zone is 205℃-215℃, the temperature of the eleventh temperature zone is 215℃-225℃, the temperature of the The temperature is 205℃-215℃, the temperature of the twelfth temperature zone is 200-210℃, the first temperature zone is the feed end of the high torque twin-screw extruder, the twelfth temperature zone is the discharge end of the high torque twin-screw extruder, and the powder fluidization modification system is connected to the side feeding port corresponding to the feed end; inorganic fillers such as calcium carbonate powder are fed into the powder fluidization modification system after being measured by the first vacuum suction hopper, and the auxiliary agent is sprayed into the powder fluidization modification system after being measured by the second vacuum suction hopper. The two activate the surface of the inorganic filler in the powder fluidization modification system, and the activated powder enters the gradient uniform mixing system through the side feeding port of the first temperature zone. At the same time, the third vacuum suction hopper synchronously measures the polyolefin resin into the side feeding port of the first temperature zone, and the activated powder and polyolefin resin enter the second temperature zone after being mixed in the first temperature zone. The side feeding port on the right side of the feed end is alternately fed with the measured activated powder and polyolefin resin in sequence.

[0010] As a further technical improvement, the powder fluidization modification system includes a self-heating high-speed mixer and a secondary mixer, the bottom outlet of the self-heating high-speed mixer is connected to the secondary mixer below through a vacuum pipe; the upper end of the first vacuum suction hopper is connected to the area storing inorganic filler powder in the storage bin through a vacuum pipe, and the lower end is connected to the self-heating high-speed mixer; the upper end of the second vacuum suction hopper is connected to the area storing additives in the storage bin through a vacuum pipe, and the lower end is connected to the self-heating high-speed mixer; the upper end of the third vacuum suction hopper is connected to the area storing polyolefin resin in the storage bin through a vacuum pipe, and the lower end is connected to the secondary mixer; according to the established configuration The percentage of the square is calculated, and the inorganic fillers such as calcium carbonate powder are measured through the first vacuum suction hopper and then put into the self-heating high mixer. At the same time, the additives are measured through the second vacuum suction hopper and then synchronously put into the self-heating high mixer. After the surface of the inorganic filler is fully activated, they enter the secondary mixer together. At the same time, the third vacuum suction hopper synchronously puts the measured polyolefin resin into the secondary mixer. At this time, the activated inorganic filler powder and the polyolefin resin are synchronously transmitted to the feed end of the high torque twin-screw extruder through the secondary mixer, and the activated inorganic filler powder and polyolefin resin are alternately put into the right side of the feed end through the remaining side feeding ports to complete gradient mixing.

[0011] As a further technical improvement, the self-heating high mixer includes a body with an open top, a cover, a sealing ring installed between the body and the cover, a heating component surrounding the body, and a stirring shaft. The upper end of the stirring shaft is located at the top of the body and passes through the center of the cover during operation, and the lower end extends to the bottom of the body. Several stirring blades are connected on both sides of the stirring shaft, and the upper end of the stirring shaft is connected to a stirring shaft drive motor installed in the center above the cover.

[0012] The secondary mixer is composed of an inverted cone container with an open top and a baffle extending upward along the top edge thereof. A secondary stirring shaft with blades is arranged in the inverted cone container, and the secondary stirring shaft should be connected to a corresponding driving motor.

[0013] The self-heating high mixer greatly increases the contact area between the inorganic filler powder and the additive by stirring, the sealing ring can ensure the sealing of the self-heating high mixer, and the heating component evenly increases the internal temperature of the self-heating high mixer to efficiently complete the surface activation modification of the inorganic filler powder. The secondary mixer can fully physically mix the activated inorganic filler powder and the polyolefin resin to prepare for the subsequent entry into the gradient uniform mixing system.

[0014] As a further technical improvement, the side feeding ports are provided with 6, wherein the first side feeding port is connected to the first temperature zone, the second side feeding port is connected to the second temperature zone, the third side feeding port is connected to the third temperature zone, the fourth side feeding port is connected to the fourth temperature zone, the fifth side feeding port is connected to the fifth temperature zone, and the sixth side feeding port is connected to the sixth temperature zone. A micro screw machine feeding device is connected above the first side feeding port, and the inlet end of the micro screw machine feeding device is connected to the secondary mixer. A loss-in-weight metering feeder is connected above the second side feeding port, the fourth side feeding port and the sixth side feeding port, respectively. The inlet end of the loss-in-weight metering feeder is connected to the bottom outlet of the self-heating high mixer through a vacuum pipe. A micro screw machine feeding device is connected above the third side feeding port and the fifth side feeding port, respectively. The micro screw machine The inlet end of the feeding device is connected with the bottom outlet of the third vacuum suction hopper; the activated inorganic filler powder and the polyolefin resin added synchronously enter the first temperature zone through the micro screw machine feeding device first, and enter the second temperature zone after being fully mixed. At this time, the second side feeding port accurately feeds the activated inorganic filler powder through a loss-in-weight metering feeder, and enters the third temperature zone after mixing again. The third side feeding port feeds the polyolefin resin through the micro screw machine feeding device, and then the fourth side feeding port accurately feeds the activated inorganic filler powder through the loss-in-weight metering feeder. The fifth side feeding port feeds the polyolefin resin through the micro screw machine feeding device, and the sixth side feeding port accurately feeds the activated inorganic filler powder through the loss-in-weight metering feeder. At this time, after the gradient mixing in the first six zones, the dispersibility of the inorganic filler powder in the polyolefin resin can be greatly improved.

[0015] As a further technical improvement, the micro screw machine feeding device comprises a transversely arranged barrel, a screw inside the barrel and a micro screw drive motor corresponding to the screw, and the micro screw machine feeding device is also provided with a control system and a heating device, the heating device comprises a resistance wire wound around the outer wall of the barrel and a temperature sensor installed on the inner wall of the barrel, the barrel is transversely divided into three temperature zones, the temperature zone close to the barrel inlet is the feeding zone, the temperature range is 180°C-200°C, the middle temperature zone of the barrel is the melting zone, the temperature range is 190°C-215°C, the temperature zone close to the barrel outlet is the metering zone, The temperature range is 180°C-200°C, the winding density of the resistance wire on the outer wall of the barrel corresponding to the feeding zone is the smallest, the winding density of the resistance wire on the outer wall of the barrel corresponding to the melting zone is the largest, the winding density of the resistance wire on the outer wall of the barrel corresponding to the metering zone is slightly smaller than that of the melting zone, a temperature sensor is respectively arranged in the inner wall of the barrel corresponding to the three temperature zones, the micro screw drive motor, the temperature sensor and the resistance wire are connected to the control system; the micro screw machine feeding device can fully heat the polyolefin resin so that it enters the high torque twin-screw extruder in the form of melt feeding, thereby accelerating the rapid and uniform mixing of the new feed and the front-end mixed material.

[0016] As a further technical improvement, it also includes a filter connected to the outlet of the high-torque twin-screw extruder, a hollow board mold arranged on the other side of the filter, a vacuum shaping table arranged at the extrusion end of the hollow board mold and a slitting device equipped with a traction machine; the fully mixed material passes through the filter and is cast into the hollow board mold, the extruded molding molten material is directly shaped on the vacuum shaping table, and is pulled into the slitting equipment by the traction machine for cooling and cutting.

[0017] As a further technical improvement, a control box is also provided in front of the bottom end of the storage bin, and the control box includes a numerical display screen and control buttons. The control box is electrically connected to the automatic metering and batching system, the powder fluidization modification system and the gradient uniform mixing system; the control box can display and change the operation and temperature conditions of each step, so as to facilitate the operator to monitor and intervene in the system status, ensure the stable operation of the system, and protect the safety of the operator.

[0018] The working principle of this utility model:

[0019] When in use, according to the percentage of the established formula, inorganic fillers such as calcium carbonate powder are metered through the first vacuum suction hopper and then put into the self-heating high mixer. At the same time, the additives are metered through the second vacuum suction hopper and then synchronously put into the self-heating high mixer. After the surface of the inorganic filler is fully activated, they enter the secondary mixer together. At the same time, the third vacuum suction hopper will synchronously put the measured polyolefin resin into the secondary mixer. At this time, the activated inorganic filler powder and polyolefin resin are metered by the secondary mixer in the micro screw machine feeding device and synchronously transmitted to the feeding end of the high torque twin-screw extruder. The materials are fully mixed in the first temperature zone and then enter the second temperature zone. At this time, the second side feeding port The activated inorganic filler powder is accurately metered and fed through a loss-in-weight metering feeder, and then mixed again before entering the third temperature zone. The polyolefin resin is metered and fed through the third side feeding port through a micro screw feeding device. Subsequently, the activated inorganic filler powder is accurately metered and fed through the fourth side feeding port through a loss-in-weight metering feeder. The polyolefin resin is metered and fed through the fifth side feeding port through a micro screw feeding device. The activated inorganic filler powder is accurately metered and fed through the sixth side feeding port through a loss-in-weight metering feeder. The fully mixed material is cast into the hollow board mold after passing through the filter screen. The extruded molding molten material is directly shaped on the vacuum shaping table and is pulled into the slitting equipment by a traction machine for cooling and cutting.

[0020] Compared with the prior art, the advantages and beneficial effects of the utility model are as follows:

[0021] 1. The utility model integrates the process of obtaining a sheet material by a twin-screw melt granulation and then a single-screw extruder extrusion molding device into a twin-screw high-mixing-extrusion integrated production device, thereby realizing continuous production with high production efficiency and low energy consumption. Continuous production can greatly improve the stability of product performance.

[0022] 2. The utility model can greatly increase the contact area between the powder and the additive by adding a self-heating high mixer that can fluidize the powder, and efficiently complete the surface activation modification of the powder. The heating function of the self-heating high mixer enables the polyolefin resin to be fed as a melt, thereby achieving a high degree of dispersion between the raw materials.

[0023] 3. The utility model can realize a gradient material mixing process by adding a side feeding port and adding materials in small amounts multiple times, thereby solving the problem of uneven dispersion of high-content inorganic filler powder in polyolefin resin. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a complete structural schematic diagram of the utility model.

[0025] Figure 2 It is a partial structural schematic diagram of the utility model.

[0026] Figure ID:

[0027] 1-Automatic metering and batching system, 11-Storage bin, 12-Micro screw machine feeding device, 121-Barrel, 122-Screw, 123-Micro screw drive motor, 13-Weightlessness metering feeder, 14-First vacuum suction hopper, 15-Second vacuum suction hopper, 16-Third vacuum suction hopper, 17-Vacuum pipeline, 2-Powder fluidization modification system, 21-Self-heating high mixer, 211-Body, 212-Cover, 213-Sealing ring, 214-Heating component, 215-Stirring shaft, 216-Stirring blade, 2 17- stirring shaft drive motor, 22- secondary mixer, 221- inverted cone container, 222- baffle, 223- secondary stirring shaft, 3- gradient uniform mixing system, 30- side feeding port, 301- first side feeding port, 302- second side feeding port, 303- third side feeding port, 304- fourth side feeding port, 305- fifth side feeding port, 306- sixth side feeding port, 31- high torque twin-screw extruder, 4- filter screen, 5- hollow board mold, 6- vacuum shaping table, 7- traction machine, 8- slitting equipment, control box -9. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings. Example

[0029] like Figure 1 and Figure 2 As shown, a granulation-free high-mixing extrusion integrated production equipment for hollow plates includes an automatic metering and batching system 1, a powder fluidization modification system 2 connected to the automatic metering and batching system 1 and used for surface modification of inorganic fillers, and a gradient uniform mixing system 3 connected to the powder fluidization modification system 2 and used for high mixing; the automatic metering and batching system 1 includes a storage bin 11 with partitions, a micro screw machine feeding device 12 and a loss-in-weight metering feeder 13 connected to the gradient uniform mixing system 3, a first vacuum suction hopper 14 for sucking inorganic fillers, a second vacuum suction hopper 15 for sucking additives, and a third vacuum suction hopper 16 for sucking polyolefin resins. 6 and the corresponding vacuum pipe 17; the gradient uniform mixing system 3 includes a high torque twin-screw extruder 31 with a plurality of side feeding ports 30, the side feeding ports 30 are correspondingly equipped with a micro screw machine feeding device 12 for feeding polyolefin resin and a weightless metering feeder 13 for feeding activated powder, the high torque twin-screw extruder 31 is internally divided into 12 temperature sections, from left to right, the first temperature zone to the twelfth temperature zone, and the temperature of the first temperature zone is 130°C-140°C, the temperature of the second temperature zone is 140°C-150°C, the temperature of the third temperature zone is 150°C-160°C, the temperature of the fourth temperature zone is 160°C-170°C, and the temperature of the twelfth temperature zone is 170°C-180°C. The temperature of the fifth temperature zone is 170°C-180°C, the temperature of the sixth temperature zone is 180°C-190°C, the temperature of the seventh temperature zone is 185°C-195°C, the temperature of the eighth temperature zone is 185°C-195°C, the temperature of the ninth temperature zone is 195°C-205°C, the temperature of the tenth temperature zone is 205°C-215°C, the temperature of the eleventh temperature zone is 205°C-215°C, and the temperature of the twelfth temperature zone is 200°C-210°C. The first temperature zone is the feed end of the high torque twin-screw extruder 31, and the twelfth temperature zone is the discharge end of the high torque twin-screw extruder 31. The powder fluidization modification system 2 is connected to the side feeding port 30 corresponding to the feed end; calcium carbonate Powder and other inorganic fillers are metered through the first vacuum suction hopper 14 and fed into the powder fluidization modification system 2. At the same time, the additives are metered through the second vacuum suction hopper 15 and sprayed into the powder fluidization modification system 2. The surfaces of the inorganic fillers are activated in the powder fluidization modification system 2. The activated powder enters the gradient uniform mixing system 3 through the side feeding port 30 of the first temperature zone. At the same time, the third vacuum suction hopper 16 synchronously meters the polyolefin resin into the side feeding port 30 of the first temperature zone. The activated powder and the polyolefin resin are mixed in the first temperature zone and then enter the second temperature zone. The side feeding port 30 on the right side of the feed end is alternately fed with the metered activated powder and the polyolefin resin. Example

[0030] The difference from Example 1 is that the powder fluidization modification system 2 includes a self-heating high mixer 21 and a secondary mixer 22, and the bottom outlet of the self-heating high mixer 21 is connected to the secondary mixer 22 below through a vacuum pipe 17; the upper end of the first vacuum suction hopper 14 is connected to the area storing inorganic filler powder in the storage bin 11 through the vacuum pipe 17, and the lower end is connected to the self-heating high mixer 21; the upper end of the second vacuum suction hopper 15 is connected to the area storing additives in the storage bin 11 through the vacuum pipe 17, and the lower end is connected to the self-heating high mixer 21; the upper end of the third vacuum suction hopper 16 is connected to the area storing polyolefin resin in the storage bin 11 through the vacuum pipe 17, and the lower end is connected to the secondary mixer 22; According to the percentage of the established formula, inorganic fillers such as calcium carbonate powder are measured through the first vacuum suction hopper 14 and then put into the self-heating high mixer 21. At the same time, the auxiliary agent is measured through the second vacuum suction hopper 15 and then synchronously put into the self-heating high mixer 21. After the surface of the inorganic filler is fully activated, they enter the secondary mixer 22 together. At the same time, the third vacuum suction hopper 16 synchronously puts the measured polyolefin resin into the secondary mixer 22. At this time, the activated inorganic filler powder and the polyolefin resin are synchronously transmitted to the feed end of the high torque twin-screw extruder 31 through the secondary mixer 22, and the activated inorganic filler powder and the polyolefin resin are alternately put into the right side of the feed end through the remaining side feeding ports 30 to complete the gradient mixing. Example

[0031] The difference from Example 2 is that the self-heating high mixer 21 includes a body 211 open at the top, a cover 212, a sealing ring 213 installed between the body 211 and the cover 212, a heating component 214 and a stirring shaft 215 surrounding the body 211, the upper end of the stirring shaft 215 is located at the top of the body 211 and passes through the center of the cover 212 during operation, and the lower end extends to the bottom of the body 211, a plurality of stirring blades 216 are connected to both sides of the stirring shaft 215, the upper end of the stirring shaft 215 is connected to a stirring shaft drive motor 217 installed in the center above the cover 212, and the secondary mixer 22 is composed of an inverted cone container 221 open at the top and The inverted cone container 221 is composed of a baffle 222 extending upward along its top edge. A secondary stirring shaft 223 with blades is arranged in the inverted cone container 221, and the secondary stirring shaft 223 is connected to the corresponding driving motor; the self-heating high mixer 21 greatly increases the contact area between the inorganic filler powder and the additive by stirring, the sealing ring 213 can ensure the sealing of the self-heating high mixer 21, and the heating component 214 uniformly increases the internal temperature of the self-heating high mixer 21 to efficiently complete the surface activation modification of the inorganic filler powder. The secondary mixer 22 can fully physically mix the activated inorganic filler powder and the polyolefin resin to prepare for the subsequent entry into the gradient uniform mixing system. Example

[0032] The difference from Example 3 is that the side feeding port 30 is provided with 6, wherein the first side feeding port 301 is connected to the first temperature zone, the second side feeding port 302 is connected to the second temperature zone, the third side feeding port 303 is connected to the third temperature zone, the fourth side feeding port 304 is connected to the fourth temperature zone, the fifth side feeding port 305 is connected to the fifth temperature zone, and the sixth side feeding port 306 is connected to the sixth temperature zone. The first side feeding port 301 is connected to a micro screw machine feeding device 12 above, and the inlet end of the micro screw machine feeding device 12 is connected to the secondary mixer 22. The second side feeding port, the fourth side feeding port 304 and the sixth side feeding port are respectively connected to a loss-in-weight metering feeder 13 above, and the inlet end of the loss-in-weight metering feeder 13 is connected to the bottom outlet of the self-heating high mixer 21 through a vacuum pipe 17. The third side feeding port 303 and the fifth side feeding port 305 are respectively connected to a micro screw machine feeding device 1 2, the inlet end of the micro screw machine feeding device 12 is connected to the bottom outlet of the third vacuum suction hopper 16; the activated inorganic filler powder and the polyolefin resin added by synchronous metering enter the first temperature zone through the micro screw machine feeding device 12 first, and enter the second temperature zone after being fully mixed. At this time, the second side feeding port 302 feeds the activated inorganic filler powder by precise metering through the loss-in-weight metering feeder 13, and enters the third temperature zone after mixing again. The third side feeding port 303 passes through the micro screw machine The feeding device 12 feeds polyolefin resin in a metered manner, and then the fourth side feeding port 304 feeds activated inorganic filler powder in a precisely metered manner through the loss-in-weight metering feeder 13. The fifth side feeding port 305 feeds polyolefin resin in a metered manner through the micro screw machine feeding device 12, and the sixth side feeding port 306 feeds activated inorganic filler powder in a precisely metered manner through the loss-in-weight metering feeder 13. At this time, after the gradient mixing in the first six zones, the dispersibility of the inorganic filler powder in the polyolefin resin can be greatly improved. Example

[0033] The difference from Example 4 is that the micro screw machine feeding device 12 includes a transversely arranged barrel 121, a screw 122 inside the barrel 121, and a micro screw drive motor 123 corresponding to the screw 122, and the micro screw machine feeding device 12 is also provided with a control system and a heating device, the heating device includes a resistance wire wound around the outer wall of the barrel and a temperature sensor installed on the inner wall of the barrel 121, the barrel 121 is transversely divided into three temperature zones, the temperature zone close to the inlet of the barrel 121 is the feeding zone, the temperature range is 180°C-200°C, the middle temperature zone of the barrel 121 is the melting zone, the temperature range is 190°C-215°C, and the temperature zone close to the outlet of the barrel 121 is the metering zone. The temperature range is 180℃-200℃, the winding density of the resistance wire on the outer wall of the barrel 121 corresponding to the feeding zone is the smallest, the winding density of the resistance wire on the outer wall of the barrel 121 corresponding to the melting zone is the largest, the winding density of the resistance wire on the outer wall of the barrel 121 corresponding to the metering zone is slightly smaller than that of the melting zone, and a temperature sensor is respectively arranged in the inner wall of the barrel 121 corresponding to the three temperature zones, and the micro-screw drive motor 123, the temperature sensor and the resistance wire are connected to the control system; the micro-screw machine feeding device is divided into three temperature zones by the arrangement of different densities of the resistance wire, which fully heats the polyolefin resin to ensure that it enters the high-torque twin-screw extruder in the form of melt feeding, and accelerates the rapid and uniform mixing of the new feed and the front-end mixed material. Example

[0034] The difference from Example 5 is that it also includes a filter screen 4 connected to the outlet of the high-torque twin-screw extruder 31, a hollow plate mold 5 arranged on the other side of the filter screen 4, a vacuum shaping table 6 arranged at the extrusion end of the hollow plate mold 5, and a slitting device 8 equipped with a traction machine 7; the fully mixed material passes through the filter screen 4 and is cast into the hollow plate mold 5, the extruded molding molten material is directly shaped on the vacuum shaping table 6, and is pulled into the slitting device 8 by the traction machine 7 for cooling and cutting. Example

[0035] The difference from Example 6 is that a control box 9 is further provided in the front bottom end of the storage bin 11, and the control box 9 includes a numerical display screen and control buttons, and the control box 9 is electrically connected to the automatic metering and batching system 1, the powder fluidization modification system 2 and the gradient uniform mixing system 3; the control box 9 can display and change the operation and temperature conditions of each step, so as to facilitate the operator to monitor and intervene in the system status, ensure the stable operation of the system, and also protect the safety of the operator.

[0036] The working principle of this embodiment is:

[0037] During use, the staff operates the control box according to the percentage of the established formula to make the inorganic fillers such as calcium carbonate powder be measured through the first vacuum suction hopper 14 and then put into the self-heating high mixer 21. At the same time, the auxiliary agent is measured through the second vacuum suction hopper 15 and then synchronously put into the self-heating high mixer 21. After the surface of the inorganic filler is fully activated, they enter the secondary mixer 22 together. At the same time, the third vacuum suction hopper 16 synchronously puts the measured polyolefin resin into the secondary mixer 22. At this time, the activated inorganic filler powder and the polyolefin resin are synchronously transmitted to the feeding end of the high torque twin-screw extruder 31 after metering and heating by the micro screw machine feeding device 12 through the secondary mixer 22. The materials enter the second temperature zone after being fully mixed in the first temperature zone. At this time, the second side feeding port 302 is connected to the feed port 31 of the high torque twin-screw extruder 31. The activated inorganic filler powder is accurately metered and fed by the loss-in-weight metering feeder 13, and then mixed again and enters the third temperature zone. The third side feeding port 303 is metered and fed with molten polyolefin resin through the micro screw machine feeding device 12. Then, the fourth side feeding port 304 is accurately metered and fed with activated inorganic filler powder through the loss-in-weight metering feeder 13. The fifth side feeding port 305 is metered and fed with molten polyolefin resin through the micro screw machine feeding device 12. The sixth side feeding port 306 is accurately metered and fed with activated inorganic filler powder through the loss-in-weight metering feeder 13. At this time, the fully mixed material is cast into the hollow board mold 5 after passing through the filter screen 4. The extruded molding molten material is directly formed on the vacuum shaping table 6 and is drawn into the slitting equipment 8 by the traction machine 7 for cooling and cutting.

[0038] Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation of the present invention. For ordinary technicians in the relevant technical field, other different forms of changes or modifications can be made based on the above description; it is not necessary and impossible to list all the implementation methods here; and the obvious changes or modifications derived from them are still within the scope of protection of the present invention.

Claims

1. A granulation-free high-mixing extrusion integrated production equipment for hollow boards, characterized by: It comprises an automatic metering and batching system (1), a powder fluidization modification system (2) connected to the automatic metering and batching system (1) and used for surface modification of inorganic fillers, and a gradient uniform mixing system (3) connected to the powder fluidization modification system (2) and used for high mixing; The automatic metering and batching system (1) comprises a storage bin (11) with partitions, a micro screw machine feeding device (12) and a loss-in-weight metering feeder (13) connected to the gradient uniform mixing system (3), a first vacuum suction hopper (14) for sucking inorganic fillers, a second vacuum suction hopper (15) for sucking additives, a third vacuum suction hopper (16) for sucking polyolefin resin, and corresponding vacuum pipes (17); The gradient uniform mixing system (3) comprises a high torque twin-screw extruder (31) having a plurality of side feeding ports (30), wherein the side feeding ports (30) are correspondingly equipped with the micro screw machine feeding device (12) for feeding polyolefin resin and the weightless metering feeder (13) for feeding activated powder. The interior of the high torque twin-screw extruder (31) is divided into 12 temperature sections, which are the first temperature zone to the twelfth temperature zone from left to right. The first temperature zone is the feeding end of the high torque twin-screw extruder (31), and the twelfth temperature zone is the discharging end of the high torque twin-screw extruder (31). The powder fluidization modification system (2) is connected to the side feeding port (30) corresponding to the feeding end.

2. The granulation-free high-mixing extrusion integrated production equipment for hollow plates according to claim 1 is characterized in that: The powder fluidization modification system (2) comprises a self-heating high-speed mixer (21) and a secondary mixer (22); the bottom outlet of the self-heating high-speed mixer (21) is connected to the secondary mixer (22) below via a vacuum pipe (17); the upper end of the first vacuum suction hopper (14) is connected to an area in the storage bin (11) storing inorganic filler powder via a vacuum pipe (17), and the lower end is connected to the self-heating high-speed mixer (21); the upper end of the second vacuum suction hopper (15) is connected to an area in the storage bin (11) storing auxiliary agents via a vacuum pipe (17), and the lower end is connected to the self-heating high-speed mixer (21); the upper end of the third vacuum suction hopper (16) is connected to an area in the storage bin (11) storing polyolefin resin via a vacuum pipe (17), and the lower end is connected to the secondary mixer (22).

3. The granulation-free high-mixing extrusion integrated production equipment for hollow plates according to claim 2 is characterized in that: The self-heating high-speed mixer (21) comprises a machine body (211) with an open top, a machine cover (212), a sealing ring (213) installed between the machine body (211) and the machine cover (212), a heating component (214) and a stirring shaft (215) arranged around the machine body (211), wherein the upper end of the stirring shaft (215) is located at the top of the machine body (211) and passes through the center of the machine cover (212) during operation, and the lower end extends to the bottom of the machine body (211), a plurality of stirring blades (216) are connected to both sides of the stirring shaft (215), and the upper end of the stirring shaft (215) is connected to a stirring shaft driving motor (217) installed in the center above the machine cover (212).

4. The granulation-free high-mixing extrusion integrated production equipment for hollow plates according to claim 1 is characterized in that: The side feeding ports (30) are provided with six, wherein the first side feeding port (301) is connected to the first temperature zone, the second side feeding port (302) is connected to the second temperature zone, the third side feeding port (303) is connected to the third temperature zone, the fourth side feeding port (304) is connected to the fourth temperature zone, the fifth side feeding port (305) is connected to the fifth temperature zone, and the sixth side feeding port (306) is connected to the sixth temperature zone, and the micro screw machine feeding device (12) is connected above the first side feeding port (301), and the inlet end of the micro screw machine feeding device (12) is connected to the secondary mixer. (22), the second side feeding port (302), the fourth side feeding port (304) and the sixth side feeding port (306) are respectively connected to a loss-in-weight metering feeder (13), the inlet end of the loss-in-weight metering feeder (13) is connected to the bottom outlet of the self-heating high mixer (21) through a vacuum pipe (17), the third side feeding port (303) and the fifth side feeding port (305) are respectively connected to a micro screw machine feeding device (12), the inlet end of the micro screw machine feeding device (12) is connected to the bottom outlet of the third vacuum suction hopper (16).

5. The granulation-free high-mixing extrusion integrated production equipment for hollow plates according to claim 1 is characterized in that: The micro screw machine feeding device (12) is internally provided with a control system and a heating device and is divided into three temperature sections.

6. The granulation-free high-mixing extrusion integrated production equipment for hollow plates according to claim 1 is characterized in that: It also includes a filter screen (4) connected to the outlet of the high-torque twin-screw extruder (31), a hollow plate mold (5) arranged on the other side of the filter screen (4), a vacuum shaping table (6) arranged at the extrusion end of the hollow plate mold (5), and a slitting device (8) equipped with a tractor (7).

7. The granulation-free high-mixing extrusion integrated production equipment for hollow plates according to claim 1 is characterized in that: A control box (9) is also provided in front of the bottom end of the storage bin (11), the control box (9) comprising a numerical display screen and control buttons, and the control box (9) is electrically connected to the automatic metering and batching system (1), the powder fluidization modification system (2) and the gradient uniform mixing system (3).

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