CN120347972A

CN120347972A - Injection pipe double-screw extrusion molding machine and injection pipe production process

Info

Publication number: CN120347972A
Application number: CN202510831456.0A
Authority: CN
Inventors: 李凯
Original assignee: Shandong Pusu Medical Technology Co ltd
Current assignee: Shandong Pusu Medical Technology Co ltd
Priority date: 2025-06-20
Filing date: 2025-06-20
Publication date: 2025-07-22
Anticipated expiration: 2045-06-20
Also published as: CN120347972B

Abstract

The invention relates to the technical field of double-screw extrusion equipment, in particular to an injection pipe double-screw extrusion molding machine and an injection pipe production process. The device comprises a base, wherein a driving box is arranged at the top of the base. This device is through the setting of first processing chamber, the second processing chamber, gas-supply pipe and cavity disc, can make gas earlier with reaction solution contact separation hydrogen chloride, then with active carbon contact separation vinyl chloride monomer, dioxin, and then avoid unifying filtration to produce the interference and influence and get rid of efficiency, can make cavity disc and active carbon circular motion through servo motor simultaneously, cavity disc rotates can make gas and the reaction solution contact of different positions through the bleeder vent, active carbon also can circular motion and different position gas contact, match annular plate and bleeder vent simultaneously can make gas reposition of redundant personnel make its even diffusion, thereby make gas and reaction solution and active carbon fully contact, avoid local contact filtration and influence the filter effect.

Description

Injection pipe double-screw extrusion molding machine and injection pipe production process

Technical Field

The invention relates to the technical field of double-screw extrusion equipment, in particular to an injection pipe double-screw extrusion molding machine and an injection pipe production process.

Background

At present, most of plastics are finished on an extruder, and the extruder can be divided into a single screw extruder and a double screw extruder, wherein the double screw extruder is developed on the basis of the single screw extruder, and the materials are pushed, heated and extruded for molding by tightly meshing two screws and rotating in opposite directions.

The existing double-screw extrusion molding machine rotates in a charging barrel through two screws (in the same direction or in the opposite direction), materials are conveyed to a die head from a hopper, meanwhile, when the screws rotate, the materials are uniformly dispersed through shearing and mixing effects of structures such as kneading blocks and the like, volatiles are removed, and finally the materials are extruded and molded through the die head, but plastic particles are easy to generate toxic gases such as hydrogen chloride (HCl), vinyl Chloride Monomer (VCM) and dioxin (PCDD/Fs) when heated and melted, if adsorption and filtration treatment are not carried out in time, the gases can seriously threaten the health of operators, can pollute the surrounding environment, and also can filter toxic gases through an adsorption pad, but hydrogen chloride (HCl) is a polar molecule, vinyl Chloride Monomer (VCM) and dioxin (PCDD/Fs) are non-polar organic matters, unmodified active carbon can cause serious threat to the adsorption capacity of the hydrogen chloride monomer and the dioxin, and the adsorption capacity of the dioxin can not influence the adsorption capacity of the active carbon on the local adsorption pad, the adsorption capacity of the active carbon and the dioxin can not easily influence the adsorption capacity of the active carbon, and the adsorption pad can not easily influence the adsorption capacity of the active carbon to other positions, and the adsorption pad can not easily be easily contact and purified.

Disclosure of Invention

Based on the above, it is necessary to provide an injection pipe twin-screw extrusion molding machine and an injection pipe production process for solving the problems of the prior art.

In order to solve the problems in the prior art, the technical scheme adopted by the invention is that the injection pipe double-screw extrusion molding machine comprises a base, wherein a driving box is arranged at the top of the base, a screw column is rotatably arranged at the side part of the driving box through a gear set, an extrusion cylinder is arranged at the side part of the driving box, a feeding hopper and an extrusion machine head are respectively arranged at the top and the side part of the extrusion cylinder, a heater is fixedly arranged on the extrusion cylinder, and a gas treatment mechanism is arranged on the base;

The gas treatment mechanism comprises a treatment box arranged at the top of the base, a first treatment cavity and a second treatment cavity which are communicated are sequentially arranged in the treatment box from bottom to top, a hollow disc and two fan-shaped shells are respectively arranged in the first treatment cavity and the second treatment cavity, active carbon is fixedly arranged on the fan-shaped shells, an annular plate is arranged in the second treatment cavity, a plurality of ventilation holes are formed in the hollow disc and the annular plate, and a driving air inlet assembly which enables the hollow disc and the fan-shaped shells to rotate is arranged on the base.

Further, the drive subassembly that admits air including set up in the mounting hole at cavity disc top, install the gas-supply pipe on the mounting hole, two fan-shaped casing pass through fixed unit with gas-supply pipe fixed connection, the top of gas-supply pipe extends to outside the processing case and install rotary joint, the bottom of processing case is provided with the gas vent, first fan and second fan are installed at the top of processing case, gas outlet and air inlet have been seted up at the extrusion tube top, intake pipe and first trachea are installed respectively to the entrance point and the exit end of first fan, intake pipe with the other end of first trachea respectively with gas outlet with rotary joint intercommunication, second trachea and exit duct are installed respectively with gas outlet with the air inlet intercommunication, the gas outlet with all install the filter screen in the air inlet, the drive hole has been seted up at the bottom of processing case, install the sleeve on the drive hole in the rotation, install two L outward to the sleeve, two L respectively with the other end of first trachea with gas outlet with rotary joint intercommunication, second trachea and exit tube respectively with the exit tube, second trachea respectively with the gas outlet tube with the gas inlet intercommunication, all install the filter screen in the air inlet, all the bottom of processing case has the hollow sleeve, the hollow rod has.

Further, the drive unit is including installing in servo motor of base lateral part, the mounting groove has been seted up at the top of base, the pivot is installed to the mounting groove internal rotation, the one end of pivot with servo motor's output shaft, the cover is equipped with reciprocal thread bush in the pivot, reciprocal thread bush is equipped with the removal seat, first rack and second rack are installed to the lateral part of removal seat, the bottom of movable rod extends to outside the sleeve and installs first gear, first gear with first rack meshes, second gear is installed to telescopic bottom, first gear with the second gear respectively with first rack with the second rack meshes, be provided with on the base with the degasification element of extrusion section of thick bamboo looks adaptation, the degasification element with the pivot cooperation is installed.

Further, a guide rod is arranged in the mounting groove, and the movable seat is in sliding connection with the guide rod.

Further, the number of teeth of the first gear is greater than the number of teeth of the second gear.

Further, the degassing element is including installing in carousel of pivot one end, eccentric shaft is installed to the lateral part eccentric of carousel, it is equipped with the connecting rod to rotate the cover on the eccentric shaft, the telescopic link is installed at the top of base, the lifter is installed to the tip of telescopic link, the other end of connecting rod rotate install in the bottom of lifter, the lifter plate is installed to the lateral part of lifter plate, a plurality of inserted bars are installed to the bottom of lifter plate, a plurality of jacks have been seted up at the top of extrusion cylinder, a plurality of all install on the jack with the fixed pipe of inserted bar looks adaptation.

Further, the fixed unit is including installing in the sector on the gas-supply pipe outer wall, two remove the chamber has been seted up on the sector, two equal slidable mounting has the sliding block in the removal chamber, two the carriage release lever and locking piece are installed respectively to the both sides that the sliding block kept away from each other, two the other end of carriage release lever all extends to outside the sector and install the arm-tie, two the limiting plate is all installed to the bottom of sector, two with the spacing groove that the removal chamber is linked together has been seted up at the top of sector, two the draw-in groove has all been seted up to the lateral part of limiting plate, two the spring is all installed to the lateral part of sliding block, two the other end of spring is installed respectively on two lateral part inner wall in the removal chamber.

Further, a partition plate is installed on the inner wall of the side part of the first treatment cavity, a flow hole is formed in the middle of the partition plate, and a netty demister is installed in the flow hole.

Further, the sealing door is hinged to the side portion of the treatment box, a drain pipe communicated with the first treatment cavity is fixedly arranged at the bottom of the treatment box, and a valve is fixedly arranged on the drain pipe.

The injection tube production process of the injection tube double-screw extrusion molding machine comprises the following steps of:

s1, before the extruder is used, respectively pouring raw materials and reaction solution into a feed hopper and a treatment box, enabling the raw materials to enter the inside of an extrusion cylinder under the action of gravity after entering the feed hopper, enabling a screw rod column to rotate through a driving box, pushing the raw materials forward, heating the raw materials in a gradient manner by a heater on the extrusion cylinder in the process, and finally extruding the raw materials uniformly through a molding runner of an extruder head, so that extrusion molding is realized;

S2, delivering the gas in the extrusion cylinder into a hollow disc, discharging the gas from a plurality of air holes on the hollow disc and contacting the gas with a reaction solution, wherein the reaction solution reacts with hydrogen chloride, then the gas with water removed continuously moves and contacts with activated carbon, the activated carbon adsorbs and filters vinyl chloride monomer and dioxin in the gas, and the adsorbed gas is delivered into the extrusion cylinder again;

And S4, rotating the hollow disc to enable the gas to be in contact with the reaction solution at different positions, blocking the ascending gas by the annular plate, and dispersing and moving upwards through the air holes to enable the gas to be uniformly diffused.

Compared with the prior art, the invention has the following beneficial effects:

The device has the advantages that through the arrangement of the first treatment cavity, the second treatment cavity, the gas transmission pipe and the hollow disc, gas can firstly contact and separate hydrogen chloride from a reaction solution, then contact and separate vinyl chloride monomer and dioxin from active carbon, so that the influence of unified filtration on removal efficiency is avoided, meanwhile, the hollow disc can rotate and the active carbon moves circularly through a servo motor, the hollow disc rotates to enable the gas to contact with the reaction solution at different positions through the vent holes, the active carbon moves circularly to contact with the gas at different positions, and meanwhile, the annular plate and the vent holes are matched to enable the gas to be split and evenly spread, so that the gas is fully contacted with the reaction solution and the active carbon, and the influence on the filtration effect due to local contact filtration is avoided;

Secondly, the device can enable the cutting knife to perform circumferential rotation through the arrangement of the servo motor, the second rack, the second gear, the sleeve and the L-shaped plate, the circumferential movement of the cutting knife can cut bubbles, so that the bubble size is thinned, the gas-liquid contact area is increased, the reaction efficiency is effectively improved, the separation effect is enhanced, meanwhile, the rotation speed of the cutting knife can be higher than that of the hollow disc through the diameter ratio of the first gear to the second gear, the cutting knife is prevented from being too slow or the cutting knife and the hollow disc synchronously rotate to affect the cutting effect, and moisture in gas can be effectively removed through the arrangement of the partition plate 46, the flow holes, the mesh demister and the heat conducting sheet, and the influence on activated carbon is avoided;

Thirdly, the device can enable the inserted link to move up and down while outputting by the servo motor through arranging the turntable, the eccentric shaft, the connecting rod, the telescopic link, the lifting block and the lifting plate, and the inserted link can continuously insert raw materials in a molten state in the extrusion cylinder under the action of the fixed pipe 15, so that bubbles wrapped in the melt are broken, and then the gas is escaped by utilizing the shearing effect of melt flow, so that the influence on the product quality caused by bubble inclusion is avoided.

Drawings

FIG. 1 is a schematic perspective view of a first view angle in an embodiment;

FIG. 2 is a schematic perspective view of a second view angle in the embodiment;

FIG. 3 is an enlarged view of the structure of FIG. 2 at A;

FIG. 4 is a schematic perspective view, partially in section, of an extrusion barrel and a processing tank in an embodiment;

FIG. 5 is an enlarged view of the structure at B in FIG. 4;

FIG. 6 is a schematic view of a partial cutaway perspective of a base and a processing tank in an embodiment;

FIG. 7 is a schematic view in partial cutaway of a schematic view of a treatment tank in an embodiment;

FIG. 8 is an enlarged view of the structure at C in FIG. 7;

fig. 9 is an enlarged schematic view of the semicircular block and the sector-shaped housing in partial cut-away in the embodiment.

The reference number in the figure is 1, the base; 2, extrusion cylinder, 3, driving box, 4, servo motor, 5, treatment box, 6, sealing door, 7, rotating shaft, 8, turntable, 9, eccentric shaft, 10, connecting rod, 11, telescopic rod, 12, lifting block, 13, lifting plate, 14, inserting rod, 15, fixed pipe, 16, first treatment cavity, 17, second treatment cavity, 18, movable rod, 19, hollow disc, 20, gas pipe, 21, rotary joint, 22, first fan, 23, second fan, 24, gas inlet pipe, 25, gas outlet pipe, 26, gas outlet, 27, gas inlet, 28, annular plate, 29, sector block, 30, sector shell, 31, activated carbon, 32, reciprocating screw sleeve, 33, moving seat, 34, first rack, 35, first gear, 36, second rack, 37, second gear, 38, sleeve, 39, L, 40, cutting knife, 41, moving rod, 42, sliding block, 43, locking block, 44, limiting plate, 45, spring, 46, partition plate, 47, mesh, 49, screw rod, 49, and heat conducting column.

Detailed Description

The invention will be further described in detail with reference to the drawings and the detailed description below, in order to further understand the features and technical means of the invention and the specific objects and functions achieved.

Fig. 1-9 illustrate a preferred embodiment of the present invention, and the present invention will be further described with reference to fig. 1-9.

Referring to fig. 1-9, an injection tube double-screw extrusion molding machine and an injection tube production process comprise a base 1, an extrusion cylinder 2 arranged on the upper side of the base 1 and screw rods 49 arranged in the extrusion cylinder 2, wherein the two screw rods 49 are arranged side by side to form a double-screw extrusion structure, a driving box 3 is arranged on the top of the base 1, the two screw rods 49 are communicated with the driving box 3, and the structure of an extrusion screw of the double-screw extrusion molding machine with the publication number of CN211994133U is the same. The driving box 3 comprises an extrusion motor and a speed reducer, wherein the extrusion motor and the speed reducer are both arranged on the base 1, an output shaft of the extrusion motor is connected with an input shaft of the speed reducer, an output shaft of the speed reducer is connected with any one screw rod column 49 through a coupler, and transmission gears meshed with each other are arranged on the two screw rod columns 49. The upper side of the feed end of the extrusion cylinder 2 is provided with a feed hopper, the discharge end of the extrusion cylinder 2 is provided with an extrusion head, the extrusion cylinder 2 is fixedly provided with a heater, and specifically, the heater is in the prior art and can adopt an electric heating coil, and a gas treatment mechanism is arranged on the base 1.

The gas treatment mechanism comprises a treatment box 5 arranged at the top of a base 1, the treatment box 5 is a cuboid box body, the treatment box 5 is located on one side of the middle of an extrusion cylinder 2, a first treatment cavity 16 and a second treatment cavity 17 are sequentially arranged in the treatment box 5 from bottom to top, a hollow disc 19 is arranged in the first treatment cavity 16, a circular shell formed by combining two fan-shaped shells 30 is arranged in the second treatment cavity 17, active carbon 31 is filled in the two fan-shaped shells 30, an annular plate 28 is arranged in the second treatment cavity 17, the annular plate 28 is located on the lower side of the fan-shaped shells 30, a plurality of air holes are formed in the hollow disc 19 and the annular plate 28, and a driving air inlet component for enabling the hollow disc 19 and the two fan-shaped shells 30 to rotate is arranged on the base 1.

By means of the structure, before use, raw materials and reaction solution are respectively poured into the feed hopper and the treatment box 5, the raw materials enter the extrusion barrel 2 through the feed hopper, the driving box 3 drives the screw rod column 49 to rotate so as to enable the raw materials to move along the extrusion barrel 2, in the process, the heater outside the extrusion barrel 2 heats the raw materials, so that the raw materials are gradually softened and melted, the raw materials in the melted state continuously move along the extrusion barrel 2 under the shearing and conveying actions of the screw rod column 49, finally, are uniformly extruded through a molding runner of the extrusion machine head, so that extrusion molding is performed, meanwhile, in the processing process, gas in the extrusion barrel 2 is driven to be fed into the hollow disc 19 through the driving air inlet component, discharged from the plurality of air holes of the hollow disc 19, contacted with the reaction solution and absorbed by hydrogen chloride, at this time, the gas continues to move and is relieved with the activated carbon 31, the activated carbon 31 adsorbs and filters vinyl chloride monomer and dioxin in the gas, the filtered gas is sent into the extrusion cylinder 2 through the driving air inlet component, and then the hydrogen chloride and the vinyl chloride monomer and the dioxin are classified and filtered, the filtering efficiency is high, the driving air inlet component can enable the hollow disc 19 and the two fan-shaped shells 30 to rotate at the same time, the gas is in contact with the reactive solution and the activated carbon 31 at different positions, the gas is blocked by the annular plate 28 in the rising process, the gas is dispersed and moves upwards through a plurality of air holes on the annular plate 28, and then the gas is uniformly diffused, so that the gas is fully contacted with the reactive solution and the activated carbon 31.

As shown in fig. 2-6, the driving air inlet assembly comprises a mounting hole formed in a hollow disc 19, an air pipe 20 is mounted on the mounting hole, the upper end of the air pipe 20 stretches out of a treatment box 5, the lower end stretches into the mounting hole, an air outlet is formed in the bottom of the treatment box 5, two fan-shaped shells 30 are fixedly connected with the air pipe 20 through fixing units, a rotary joint 21 is mounted on the top of the air pipe 20, the rotary joint 21 is positioned outside the treatment box 5, a first fan 22 and a second fan 23 are mounted on the upper side of the treatment box 5, an air outlet 26 and an air inlet 27 are formed in the top of the extrusion cylinder 2, an air inlet pipe 24 and a first air pipe are mounted at the inlet end and the outlet end of the first fan 22 respectively, the other ends of the air inlet pipe 24 and the first air pipe are respectively communicated with the inner wall of the air outlet 26 and the rotary joint 21, a second air pipe and an air outlet 25 are respectively mounted at the inlet end and the outlet end of the second fan 23, the air outlet 26 and the air outlet 27 are respectively communicated with the air outlet and the air inlet 27, a filter screen is mounted in the top of the treatment box 5, a driving hole is formed in the bottom of the treatment box 5, a driving sleeve 38 is mounted in the air outlet 26 and the air inlet 27, a rotating sleeve 38 is mounted in the hollow disc 38 is provided with two symmetrical sleeves 39, two cutting shafts 39 are mounted on the two rotating shafts 18 and a movable disc 18 are mounted on the two shafts and a movable disc 18, a movable disc 18 is mounted on the movable disc 18, and a movable disc 38 is mounted on the movable disc 18, and a movable disc 18 is mounted on the movable disc 18, and the movable disc is mounted on the movable disc 18 and the movable disc 18. In this embodiment, the movable rod 18 and the sleeve 38 are sealed, and sealing can be achieved by adopting a sealing ring or a mechanical sealing mode.

In this scheme, in the gas outflow in the extrusion cylinder 2 adsorbs the filtration back and discharges into extrusion cylinder 2 again, through movable rod 18, sleeve 38, L shaped plate 39 and cutting knife 40's setting for hollow disc 19 rotates and drives cutting knife 40 motion, thereby cuts the bubble.

Specifically, the toxic gas in the extrusion cylinder 2 can be sucked and conveyed through the gas conveying pipe 20, the rotary joint 21, the first fan 22, the gas inlet pipe 24, the first gas pipe and the gas outlet 26, so that the gas enters the hollow disc 19, after the gas is filtered and adsorbed, the gas can be conveyed into the extrusion cylinder 2 under the cooperation of the second fan 23, the gas outlet pipe 25, the second gas pipe, the gas outlet and the gas inlet 27, and then gas circulation is formed, so that the gas in the extrusion cylinder 2 is continuously treated, the hollow disc 19 can be made to rotate through the arrangement of the movable rod 18 and the driving unit, the gas is further made to contact with reaction solutions at different positions, meanwhile, the driving unit can make the sleeve 38 rotate, the cutting knife 40 is made to perform circular motion through the L-shaped plate 39, the gas bubbles are cut, the gas-liquid contact area is further thinned, the reaction efficiency is effectively improved, and the separation effect is enhanced.

As shown in fig. 6, the driving unit includes a servo motor 4 mounted on the side of a base 1, a mounting groove is provided at the top of the base 1, a rotating shaft 7 is rotatably mounted in the mounting groove, one end of the rotating shaft 7 is fixedly connected with an output shaft of the servo motor 4, a reciprocating screw sleeve 32 is fixedly sleeved on the rotating shaft 7, a movable seat 33 is sleeved on the reciprocating screw sleeve 32, a first rack 34 and a second rack 36 are mounted on the side of the movable seat 33, the second rack 36 is located on the upper side of the first rack 34, the bottom end of a movable rod 18 extends out of a sleeve 38 and is provided with a first gear 35, the first gear 35 is meshed with the first rack 34, a second gear 37 is mounted at the bottom end of the sleeve 38, the second gear 37 is meshed with the second rack 36, a degassing element matched with the extrusion cylinder 2 is mounted on the base 1, and the degassing element is matched with the rotating shaft 7.

Specifically, the servo motor 4 drives the rotating shaft 7 to rotate, the rotating shaft 7 drives the movable seat 33 to reciprocate through the reciprocating thread sleeve 32, and the movable seat 33 enables the first gear 35 and the second gear 37 to rotate simultaneously through the first rack 34 and the second rack 36, so that the movable rod 18 and the sleeve 38 rotate simultaneously. In this embodiment, the reciprocating screw sleeve 32 is continuously rotated in one direction, so that the reciprocating movement of the movable seat 33 can be realized, which is the prior art.

As shown in fig. 6, a guide rod is installed in the installation groove, the guide rod is parallel to the rotating shaft 7, and the movable seat 33 is slidably connected with the guide rod.

In this scheme, through the setting of guide bar, play certain guide effect, when using, can make the removal seat 33 more stable the removal in the horizontal direction.

As shown in fig. 6, the modulus of the first gear 35 is the same as that of the second gear 37, and the number of teeth of the first gear 35 is larger than that of the second gear 37.

In this embodiment, the rotation speed of the movable rod 18 is made smaller than the rotation speed of the sleeve 38 by the gear ratio setting of the first gear 35 and the second gear 37.

Specifically, when the first rack 34 and the second rack 36 move, the first gear 35 and the second gear 37 are rotated, at this time, due to the gear ratio of the first gear 35 and the second gear 37, the rotation speed of the first gear 35 is smaller than that of the second gear 37, and further, the rotation speed of the movable rod 18 is smaller than that of the sleeve 38, so that the rotation speed of the hollow disc 19 is smaller than that of the cutter 40, and the cutter 40 and the hollow disc 19 are prevented from rotating at the same speed to affect the cutting effect.

As shown in fig. 3, 5 and 6, the degassing element comprises a rotary table 8 installed at one end of a rotary shaft 7, an eccentric shaft 9 is eccentrically installed at one side of the rotary table 8, a connecting rod 10 is rotatably sleeved on the eccentric shaft 9, a telescopic rod 11 is installed at the top of a base 1, a lifting block 12 is installed at the end of the telescopic rod 11, the other end of the connecting rod 10 is rotatably installed at the bottom of the lifting block 12, a lifting plate 13 is installed at the side part of the lifting block 12, a plurality of inserting rods 14 are installed at the bottom of the lifting plate 13, a plurality of inserting holes are formed in the top of an extrusion cylinder 2, fixing pipes 15 corresponding to the inserting rods 14 one by one are installed on the plurality of inserting holes, and the lower end of each inserting rod 14 is slidably inserted into the corresponding fixing pipe 15.

Specifically, the rotating shaft 7 rotates and simultaneously enables the lifting plate 13 to reciprocate up and down, so that the inserting rod 14 continuously moves up and down, the inserting rod 14 can continuously insert raw materials in a molten state in the extrusion barrel 2 under the action of the fixing pipe 15, then bubbles wrapped in the melt are broken, then the shearing effect of melt flow is utilized to enable gas to escape, and accordingly influence on product quality due to bubble inclusion is avoided.

As shown in fig. 7 and 9, the fixing unit includes a sector block 29 installed on the outer wall of the air pipe 20, two moving cavities are provided on the sector block 29, sliding blocks 42 are slidably installed in the two moving cavities, two opposite sides of the two sliding blocks 42 are respectively provided with a moving rod 41 and a locking block 43, wherein the locking block 43 is arranged on one side close to the air pipe 20, the top of the locking block 43 is inclined gradually approaching to the air pipe 20 from top to bottom, the other ends of the two moving rods 41 extend out of the sector block 29 and are provided with pull plates, limiting plates 44 are installed at the bottoms of the two sector shells 30, two limiting grooves communicated with the moving cavities are provided at the top of the sector block 29, clamping grooves are provided at the side parts of the two limiting plates 44, springs 45 are installed at one sides of the two sliding blocks 42 far away from the locking block 43, and the springs 45 are sleeved outside the moving rods 41.

Specifically, the locking block 43 can be driven to move through the pulling plate and the moving rod 41, so that the locking block 43 is separated from the clamping groove, further the limit of the limiting plate 44 is canceled, and when the activated carbon 31 is installed, the limiting plate 44 moves downwards and presses the top of the locking block 43, and the locking block 43 moves to avoid and reset firstly and stretches into the clamping groove under the action of the spring 45, so that the fixing of the limiting plate 44 is realized, the activated carbon 31 is replaced conveniently, and the replacement time is shortened.

As shown in fig. 8, the partition plate 46 is installed on the inner wall of the first processing chamber 16, the middle part of the partition plate 46 is provided with a flow hole, the inner wall of the flow hole is provided with the mesh-shaped demister 47, the gas pipe 20 is provided with three fixing holes, the three fixing holes are provided with heat conducting fins 48, the heat conducting fins 48 are positioned in the flow hole, and the heat conducting fins 48 are positioned on the upper side of the mesh-shaped demister 47. In the present embodiment, the partition plate 46 is located between the first processing chamber 16 and the second processing chamber 17.

Specifically, the first processing chamber 16 and the second processing chamber 17 can be separated by the separation plate 46, so that gas can only enter the second processing chamber 17 from the flow holes, meanwhile, the flowing gas can be contacted with the mesh demister 47 and the heat conducting sheet 48, at this time, the fine mesh layer of the mesh demister 47 can efficiently intercept water vapor droplets carried in the gas, and the heat conducting sheet 48 can absorb the waste heat of high-temperature gas in the pipe in real time and form heat conduction, and perform heat exchange on the demisted gas, so as to improve the activity of the activated carbon 31.

As shown in fig. 1 and 4, the side part of the treatment box 5 is hinged with a sealing door 6, the bottom of the treatment box 5 is fixedly provided with a drain pipe communicated with the first treatment cavity 16, and the drain pipe is fixedly provided with a valve.

In this scheme, through sealing door 6 and the setting of drain pipe, be convenient for maintain the inside device of processing case 5, through the setting of drain pipe, be convenient for handle the solution after the reaction in the first processing chamber 16.

The injection tube production process of the injection tube double-screw extrusion molding machine comprises the following steps:

S1, before use, respectively pouring raw materials and reaction solution into a feed hopper and a treatment box 5, wherein the reaction solution is only led into a first treatment cavity 16, the reaction solution can be sodium carbonate solution, sodium bicarbonate solution, organic weak base solution (such as triethanolamine) and the like, the raw materials enter the extrusion barrel 2 under the action of gravity after entering the feed hopper, then a screw column 49 is rotated through a driving box 3, the raw materials are pushed forward, in the process, a sectional heater outside the extrusion barrel 2 is provided with independent control multiple sections, so that gradient heating of the raw materials is realized, the raw materials are gradually softened and melted through accurate temperature control, the raw materials in a molten state continuously move forward under the shearing and conveying actions of a screw, and finally are uniformly extruded through a molding runner of an extrusion machine head, so that extrusion molding is realized;

S2, when heating, starting the servo motor 4, wherein the servo motor 4 is started to enable the rotating shaft 7 to rotate, and the rotating shaft 7 can enable the inserting rod 14 to continuously move up and down, so that raw materials in a molten state in the extrusion cylinder 2 are continuously inserted, bubbles wrapped in the melt are further broken, then the shearing effect of melt flow is utilized to enable gas to escape, and therefore the influence on product quality caused by bubble inclusion is avoided;

S3, starting a first fan 22 and a second fan 23, wherein the output of the first fan 22 can enable the gas in the extrusion cylinder 2 to be discharged from a plurality of air holes on the hollow disc 19 and be contacted with a reaction solution, at the moment, the reaction solution can react with hydrogen chloride, vinyl chloride monomers and dioxin can continue to move without reacting with the reaction solution, the gas can continue to move and contact with activated carbon 31 through a mesh demister 47 and a heat conducting fin 48 so as to remove moisture in the gas, the activated carbon 31 adsorbs and filters the vinyl chloride monomers and the dioxin in the gas, and the adsorbed gas is discharged into the extrusion cylinder 2 through the second fan 23, an air outlet pipe 25, an air outlet, an air inlet 27 and a second air pipe so as to classify and filter the hydrogen chloride, the vinyl chloride monomers and the dioxin, thereby avoiding the influence on the removal efficiency caused by the interference of unified filtration;

S4, simultaneously, the rotation of the rotating shaft 7 can enable the hollow disc 19 to rotate, the rotation of the hollow disc 19 enables gas to be in contact with reaction solutions at different positions, ascending gas can be blocked by the annular plate 28 firstly and then dispersed and moved upwards through the air holes, so that the gas is uniformly diffused, simultaneously, the rotation of the hollow disc 19 enables the two fan-shaped shells 30 to rotate through the air pipe 20, the rotation of the two fan-shaped shells 30 enables the activated carbon 31 to move, and then the gas is in contact with the activated carbon 31 at different positions, so that the gas is fully in contact with the reaction solutions and the activated carbon 31, and the influence on the filtering effect due to local contact filtering is avoided;

S5, when the rotating shaft 7 rotates, the cutting knife 40 moves circularly, and the bubbles are cut by the circular movement of the cutting knife 40, so that the bubble size is thinned, the gas-liquid contact area is increased, the reaction efficiency is improved, and the separation effect is enhanced.

The device has the working principle that before the device is used, raw materials and reaction solution are respectively poured into a feed hopper and a processing box 5, the raw materials enter the extrusion barrel 2 under the action of gravity after entering the feed hopper, then a screw rod column 49 is rotated through a driving box 3, at the moment, the meshing rotation of the screw rod column 49 forms forced conveying, solid raw materials in the extrusion barrel 2 are pushed forwards along the axial direction, in the process, a sectional heater outside the extrusion barrel 2 synchronously heats the raw materials in a gradient way, the raw materials are gradually softened and melted through precise temperature control, the raw materials in a melted state continuously move under the actions of screw rod shearing and conveying, and finally the raw materials are uniformly extruded through a molding runner of an extrusion machine head, so that extrusion molding is realized.

When in heating, the servo motor 4, the first fan 22 and the second fan 23 are started, the servo motor 4 is started to enable the rotating shaft 7 to rotate, the rotating shaft 7 rotates to enable the rotary table 8 to rotate, the rotary table 8 rotates to enable the eccentric shaft 9 to circularly move, the eccentric shaft 9 circularly moves to give force to the lifting block 12 through the connecting rod 10, the lifting block 12 continuously moves up and down under the action of the telescopic rod 11, the lifting block 12 continuously moves up and down to enable the lifting plate 13 to continuously move up and down, the lifting plate 13 continuously moves up and down to enable the inserting rod 14 to continuously move up and down, the inserting rod 14 continuously moves up and down to continuously insert raw materials in a molten state in the extrusion cylinder 2 under the action of the fixing tube 15, further, bubbles wrapped in the melt are broken, then the gas escapes by utilizing the shearing effect of the flow of the melt, and accordingly the influence on the product quality caused by bubble inclusion is avoided, meanwhile, the output of the first fan 22 outputs gas which is generated by heating raw materials and is cracked and overflowed by bubbles in the extrusion cylinder 2 through the air inlet pipe 24, the air outlet 26 and the first air pipe into the rotary joint 21, the gas continuously flows and is output into the hollow disc 19 through the air pipe 20, then the gas is discharged from the air holes and contacts with the reaction solution, the reaction solution reacts with hydrogen chloride, vinyl chloride monomer and dioxin do not react with the reaction solution and continuously move, the gas continuously moves into the second processing cavity 17, the gas is blocked by the annular plate 28 at this time, the gas is dispersed and moved upwards through the air holes, the gas is uniformly diffused, the gas continuously rises and contacts with the activated carbon 31, the activated carbon 31 adsorbs and filters the vinyl chloride monomer and the dioxin in the gas, and the adsorbed gas passes through the second fan 23, the outlet duct 25, the exhaust port, the air inlet 27 and the second air pipe are discharged into the extrusion barrel 2, and then the hydrogen chloride, the vinyl chloride monomer and the dioxin are classified and filtered, so that the removal efficiency is influenced by avoiding the unified filtration, meanwhile, when the rotating shaft 7 rotates, the reciprocating thread sleeve 32 rotates under the action of the guide rod to enable the movable seat 33 to reciprocate, the movable seat 33 reciprocates to enable the first rack 34 to reciprocate, the first rack 34 reciprocates to enable the first gear 35 to rotate, the first gear 35 rotates to enable the movable rod 18 to rotate, the movable rod 18 rotates to enable the hollow disc 19 to rotate, then the gas is enabled to be contacted with the reaction solution at different positions, the hollow disc 19 rotates to enable the gas conveying pipe 20 to rotate, the two fan-shaped shells 30 rotate through the fan-shaped blocks 29, the two fan-shaped shells 30 rotate to enable the activated carbon 31 to move, the gas is enabled to be in contact with the activated carbon 31 at different positions, and the gas is enabled to be fully contacted with the reaction solution and the activated carbon 31, and the filtering effect is prevented from being influenced by local contact filtration.

When the movable seat 33 reciprocates, the second rack 36 is driven to reciprocate, the second rack 36 reciprocates to enable the second gear 37 to rotate, the second gear 37 reciprocates to enable the sleeve 38 to rotate, the sleeve 38 rotates to enable the L-shaped plate 39 to move circumferentially, the L-shaped plate 39 moves circumferentially to enable the cutting knife 40 to move circumferentially, the cutting knife 40 cuts bubbles, and therefore the bubble size is thinned, the gas-liquid contact area is increased, the reaction efficiency is effectively improved, and the separation effect is enhanced.

After the gas reacts with the reaction solution, the gas is contacted with the mesh demister 47 in the rising process, at this time, the fine mesh layer of the mesh demister 47 can effectively intercept water vapor droplets carried in the gas, and meanwhile, the heat conducting fin 48 arranged on the gas pipe 20 is attached to absorb the waste heat of the high-temperature gas in the pipe in real time and form heat conduction, so that the demisted gas is subjected to heat exchange.

When the activated carbon 31 needs to be replaced, the pulling plate is pulled, the pulling plate moves to enable the moving rod 41 to move, the moving rod 41 moves to enable the sliding block 42 to move, the sliding block 42 moves to enable the locking block 43 to move, when the locking block 43 moves out of the clamping groove, the limiting plate 44 is not limited, then the limiting plate 44 moves out, and then the fan-shaped shell 30 moves out, after the limiting plate is moved out, the pulling plate is loosened, the sliding block 42 is reset under the action of the spring 45, then the limiting plate 44 on the new fan-shaped shell 30 is inserted into the limiting groove, when the limiting plate 44 is in contact with the locking block 43, the limiting plate 44 continues to move to squeeze the locking block 43 to move, when the clamping groove is aligned with the locking block 43, the locking block 43 is reset under the action of the spring 45, and then the limiting plate 44 is fixed, so that the activated carbon 31 is replaced conveniently, and the replacement time is shortened.

The foregoing examples merely illustrate one or more embodiments of the invention, which are described in greater detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. The injection tube double-screw extrusion molding machine comprises a base (1) and is characterized in that a driving box (3) is arranged at the top of the base (1), a screw column (49) is rotatably arranged at the side part of the driving box (3) through a gear set, an extrusion cylinder (2) is arranged at the side part of the driving box (3), a feeding hopper and an extrusion machine head are respectively arranged at the top and the side part of the extrusion cylinder (2), a heater is fixedly arranged on the extrusion cylinder (2), and a gas treatment mechanism is arranged on the base (1);

The gas treatment mechanism comprises a treatment box (5) arranged at the top of the base (1), a first treatment cavity (16) and a second treatment cavity (17) which are communicated are sequentially arranged in the treatment box (5) from bottom to top, a hollow disc (19) and two fan-shaped shells (30) are respectively arranged in the first treatment cavity (16) and the second treatment cavity (17), active carbon (31) is fixedly arranged on each fan-shaped shell (30), an annular plate (28) is arranged in each second treatment cavity (17), a plurality of air holes are formed in each hollow disc (19) and each annular plate (28), and a driving air inlet assembly which enables the hollow disc (19) and the fan-shaped shells (30) to rotate is arranged on the base (1).

2. The injection tube double-screw extrusion molding machine according to claim 1, wherein the driving air inlet assembly comprises a mounting hole formed in the top of the hollow disc (19), an air inlet tube (20) is mounted on the mounting hole, two fan-shaped shells (30) are fixedly connected with the air inlet tube (20) through a fixing unit, the top of the air inlet tube (20) extends out of the treatment box (5) and is provided with a rotary joint (21), the bottom of the treatment box (5) is provided with an air outlet, the top of the treatment box (5) is provided with a first fan (22) and a second fan (23), the top of the extrusion tube (2) is provided with an air outlet (26) and an air inlet (27), the inlet end and the outlet end of the first fan (22) are respectively provided with an air inlet tube (24) and a first air tube, the other ends of the air inlet tube (24) and the first air tube are respectively communicated with the air outlet (26) and the rotary joint (21), the inlet end and the outlet tube (25) are respectively provided with an air outlet tube (25) and an air outlet tube (25), the top of the treatment box (5) is provided with an air outlet (27), the filter mesh (38) is respectively mounted on the top of the extrusion tube, two L-shaped plates (39) are arranged outside the sleeve (38), cutting knives (40) are arranged at the tops of the two L-shaped plates (39), the movable rod (18) is rotatably arranged in the sleeve (38), the hollow disc (19) is arranged on the top end of the movable rod (18), and a driving unit which enables the movable rod (18) and the sleeve (38) to rotate is arranged on the base (1).

3. Injection tube twin-screw extrusion moulding machine according to claim 2, characterized in that the drive unit comprises a servo motor (4) mounted on the side of the base (1), a mounting groove is formed in the top of the base (1), a rotating shaft (7) is rotatably mounted in the mounting groove, one end of the rotating shaft (7) is connected with an output shaft of the servo motor (4), a reciprocating thread sleeve (32) is sleeved on the rotating shaft (7), a moving seat (33) is arranged on the thread sleeve (32), a first rack (34) and a second rack (36) are mounted on the side of the moving seat (33), a first gear (35) is mounted on the bottom end of the movable rod (18) and extends out of the sleeve (38), the first gear (35) is meshed with the first rack (34), a second gear (37) is mounted on the bottom end of the sleeve (38), the first gear (35) and the second gear (37) are respectively meshed with the first rack (34) and the second rack (36), and the degassing element (1) is mounted on the extruding element.

4. A twin-screw extrusion molding machine for injection pipes according to claim 3, wherein a guide rod is installed in the installation groove, and the movable seat (33) is slidably connected with the guide rod.

5. A twin-screw extrusion molding machine for injection pipes according to claim 3, characterized in that the number of teeth of the first gear (35) is greater than the number of teeth of the second gear (37).

6. The injection tube double-screw extrusion molding machine according to claim 3, wherein the degassing element comprises a rotary table (8) installed at one end of the rotary shaft (7), an eccentric shaft (9) is eccentrically installed at the side part of the rotary table (8), a connecting rod (10) is rotatably sleeved on the eccentric shaft (9), a telescopic rod (11) is installed at the top of the base (1), a lifting block (12) is installed at the end part of the telescopic rod (11), a lifting plate (13) is rotatably installed at the bottom of the lifting block (12) at the other end of the connecting rod (10), a plurality of inserting rods (14) are installed at the bottom of the lifting plate (13), a plurality of insertion holes are formed in the top of the extrusion cylinder (2), and fixing tubes (15) matched with the inserting rods (14) are installed on the insertion holes.

7. The injection tube double-screw extrusion molding machine according to claim 2, wherein the fixing unit comprises a sector block (29) installed on the outer wall of the air pipe (20), two moving cavities are formed in the sector block (29), sliding blocks (42) are slidably installed in the two moving cavities, a moving rod (41) and a locking block (43) are installed on two sides, away from each other, of the two sliding blocks (42), the other ends of the two moving rods (41) extend out of the sector block (29) and are provided with pull plates, limiting plates (44) are installed at the bottoms of the two sector shells (30), two limiting grooves communicated with the moving cavities are formed in the tops of the sector block (29), clamping grooves are formed in the side portions of the two limiting plates (44), springs (45) are installed on the side portions of the two sliding blocks (42), and the other ends of the two springs (45) are installed on the inner walls of the side portions of the two moving cavities respectively.

8. The injection pipe double-screw extrusion molding machine according to claim 2, wherein a partition plate (46) is installed on the inner wall of the side portion of the first processing cavity (16), a flow hole is formed in the middle of the partition plate (46), and a mesh demister (47) is installed in the flow hole.

9. The injection pipe double-screw extrusion molding machine according to claim 1, wherein a sealing door (6) is hinged to the side part of the processing box (5), a drain pipe communicated with the first processing cavity (16) is fixedly arranged at the bottom of the processing box (5), and a valve is fixedly arranged on the drain pipe.

10. An injection tube production process of an injection tube twin screw extrusion molding machine as claimed in any one of claims 1 to 9, comprising the steps of:

S1, before the extruder is used, pouring raw materials and reaction solution into a feed hopper and a treatment box (5) respectively, enabling the raw materials to enter the inside of an extrusion cylinder (2) under the action of gravity after entering the feed hopper, enabling a screw rod column (49) to rotate through a driving box (3), pushing the raw materials forward, heating the raw materials in a gradient manner by a heater on the extrusion cylinder (2) in the process, and finally extruding uniformly through a molding runner of an extruder head, so that extrusion molding is realized;

S2, delivering the gas in the extrusion cylinder (2) into a hollow disc (19), discharging the gas from a plurality of air holes on the hollow disc (19) and contacting the gas with a reaction solution, wherein the reaction solution reacts with hydrogen chloride, then the gas with water removed continuously moves and contacts with activated carbon (31), the activated carbon (31) adsorbs and filters vinyl chloride monomer and dioxin in the gas, and delivering the adsorbed gas into the extrusion cylinder (2) again;

and S4, rotating the hollow disc (19) to enable the gas to contact with the reaction solution at different positions, blocking the ascending gas by the annular plate (28), and dispersing and moving upwards through the air holes to enable the gas to be uniformly diffused.