An experimental co-rotating parallel twin-screw extruder

Abstract

The invention discloses an experimental co-directional parallel twin-screw extruder, comprising a main engine base, a driving motor, a gear reduction box, a main engine barrel and a main engine feeder are arranged above the main engine base, two mutually parallel screw core shafts are arranged inside the main engine barrel, a cooling device for cooling the main engine barrel is arranged inside the main engine base, the driving motor and the gear reduction box are connected by a coupling, the gear reduction box and the main engine barrel are connected by a coupling body, the main engine feeder is fixed on the coupling body, various types of threaded sleeves and various types of meshing blocks can be combined and installed on the core shaft of the screw core shaft according to process requirements, the equipment of the invention meets the use requirements of the laboratory through an integrated miniaturized design, can be put into small batches of materials according to the process requirements of the high molecular polymer material, quickly complete the test of high molecular polymer materials with different formulas, save test materials, and reduce test costs.

Description

Technical Field

[0001] The invention relates to the technical field of high molecular polymer material processing equipment, in particular to an experimental co-rotating parallel twin-screw extruder. Background Art

[0002] In order to meet various demands for polymer materials, it is necessary to blend and modify the corresponding materials according to different application occasions, and obtain polymer materials with specific properties through melting, mixing, devolatilization, polymerization, reaction and other process. Before large-scale production of polymer materials, it is necessary to conduct blending and modification tests on the corresponding materials, and finally obtain the processing technology and formula of polymer materials with specific properties before large-scale industrial production.

[0003] At present, the test equipment for the research and development stage of new polymer materials adopts the same equipment as that used in industrial production. It occupies a large space and is not suitable for experimental environment. The research and development test cycle is long and a large amount of materials are needed to obtain the final correct processing technology and formula, which increases the research and development cost investment. Summary of the invention

[0004] Technical purpose: In view of the shortcomings of existing polymer material testing equipment, such as large space occupation, long R&D cycle and high R&D cost investment, the present invention discloses an experimental co-rotating parallel twin-screw extruder which is small in size, easy to operate and can save test cost investment.

[0005] Technical solution: To achieve the above technical objectives, the present invention adopts the following technical solution:

[0006] An experimental co-rotating parallel twin-screw extruder is used for the research and development of high molecular polymer materials, comprising a main engine base, a driving motor, a gear reduction box, a main engine barrel and a main engine feeder are arranged above the main engine base, two screw core shafts parallel to each other are arranged inside the main engine barrel, a cooling device for cooling the main engine barrel is arranged inside the main engine base, the driving motor and the gear reduction box are connected by a coupling, the gear reduction box and the main engine barrel are connected by a coupling body, and the main engine feeder is fixed on the coupling body;

[0007] The housing of the gear reducer is composed of an upper housing and a lower housing connected together, and an input shaft, an output shaft A, an output shaft B and a transition shaft are arranged in parallel in the housing. The gear reducer is provided with mounting holes corresponding to the respective shafts on the housing, and the input shaft, the output shaft A, the output shaft B and the transition shaft are connected to the mounting holes through bearings, and the input shaft, the output shaft A, the output shaft B and the transition shaft are driven by gear meshing, and the input shaft is connected to the output shaft of the driving motor through a coupling, and the output shaft A and the output shaft B are respectively connected to a screw mandrel through a spline sleeve, and the connecting ends of the output shaft A, the output shaft B and the screw mandrel are all located in the coupling body;

[0008] The main cylinder includes a feeding cylinder, a closing cylinder, an exhaust cylinder and an extrusion cylinder. A thermocouple for detecting the cylinder temperature is arranged below each cylinder. The feeding cylinder, the closing cylinder and the exhaust cylinder are connected in sequence. A plurality of closing cylinders are arranged between the exhaust cylinder and the extrusion cylinder. An electric heater I is installed on each closing cylinder, and an electric heater II is installed on the exhaust cylinder and the extrusion cylinder.

[0009] The main feeder comprises a reduction motor, a feeder hopper, a feeder screw, a feeder body and a feeder bracket. The feeder body is fixed to the coupling body through the feeder bracket. The feeder hopper is installed above the feeder body. The reduction motor is installed horizontally. The front flange of the reduction motor is connected to the vertical plate of the feeder bracket. The output shaft of the reduction motor passes through the vertical plate of the feeder bracket and is connected to the rear end of the feeder screw. The two end surfaces of the feeder body are provided with rear end holes and front end holes for installing the feeder screw. The rear end hole of the feeder body is located between the feeder body and the feeder bracket. The feeder screw passes through the rear end hole and the front end hole of the feeder body in sequence. The front end of the feeder screw is connected to a blanking box for feeding materials to the main cylinder. The front end of the feeder screw is located in the blanking box. A blanking box cover plate is provided on the upper part of the blanking box. The blanking box is fixed to the feeding cylinder through the blanking box bracket. The feeding cylinder is provided with a feeding port corresponding to the bottom of the blanking box.

[0010] The cooling device comprises a clean water pump for conveying internal circulating cooling water, a water tank for storing the internal circulating cooling water and a water-cooled heat exchanger for exchanging heat between the internal circulating cooling water and the outside, the water tank comprises a water outlet flange and a water tank return pipe, the water inlet of the clean water pump is connected to the water outlet flange, the water outlet of the clean water pump is connected to the water outlet pipe, the water outlet of the water-cooled heat exchanger is connected to the water tank return pipe, the water inlet of the water-cooled heat exchanger is connected to the return pipe, and a main engine water inlet pipe and a main engine water return pipe for cooling the main engine cylinder are installed in parallel on both sides of the main engine cylinder, the main engine water inlet pipe and the main engine water return pipe are fixed to the upper plane of the main engine base through pipe clamps, the main engine water inlet pipe is connected to the water outlet pipe, the main engine water return pipe is connected to the return pipe, each cylinder of the main engine cylinder is respectively provided with a cylinder water inlet branch pipe and a cylinder water return branch pipe, a cooling water channel is arranged inside the cylinder, and the main engine water inlet pipe and the main engine water return pipe can be connected through the cylinder water inlet branch pipe, the solenoid valve, the needle valve, the cooling water channel inside the cylinder and the cylinder water return branch pipe.

[0011] Preferably, an operation panel is fixed on the upper surface of the host base, and the operation panel is installed on the upper plane of the host base through the support of the operation panel bracket. An electrical cabinet for installing electrical devices is arranged next to the cooling device of the host base, and a shock-absorbing pad is arranged at the bottom of the host base for adjusting the horizontal installation position of the host base.

[0012] Preferably, a liquid level gauge is provided on the side of the gear reduction box body, an air filter connecting the box body with the atmosphere is provided on the upper part of the upper box body, a first transmission gear is provided on the input shaft, a gear A meshing with the first transmission gear is fixed on the output shaft A, a second transmission gear coaxial with gear A is provided on the output shaft A, a gear B meshing with the second transmission gear is fixed on the transition shaft, a third transmission gear coaxial with gear B is provided on the transition shaft, and the output shaft B is provided with a fourth transmission gear meshing with the third transmission gear.

[0013] Preferably, a transition plate connected to the main body cylinder is provided at the front end surface of the main body cylinder, a cylinder support for supporting the main body cylinder is provided at the bottom of the main body cylinder, and an adjustment screw for adjusting the center height of the main body cylinder is provided at the cylinder support below the main body cylinder;

[0014] A first exhaust block is installed at the upper opening of the exhaust cylinder, a second exhaust block is installed at the upper opening of the extrusion cylinder, a vacuum exhaust chamber is installed above the second exhaust block, the vacuum exhaust chamber is connected to an external vacuum exhaust system through an exhaust pipe on its side, and a vacuum gauge installation hole for installing a vacuum gauge is provided on the exhaust pipe;

[0015] The head body is connected with the transition plate and the extrusion cylinder, the transition plate and the porous plate are arranged between the extrusion cylinder and the head body, the rear end face of the transition plate is connected to the front end face of the extrusion cylinder, the rear end face of the porous plate is connected to the front end face of the transition plate, the front end face of the porous plate is connected to the rear end face of the head body, a filter screen is installed in the porous plate, and the head body is fixedly connected to the transition plate by connecting bolts;

[0016] An electric heating tube for heating and heat preservation is arranged inside the head body, a thermocouple mounting hole for installing a thermocouple is arranged at the front end of the head body, a head template connected to the head body is arranged at the lower part of the front end of the head body, and the head template is provided with a discharge hole.

[0017] Preferably, a melting temperature thermocouple mounting hole is provided at the upper end of the transition plate, a melting pressure sensor mounting hole is provided at the lower end, the connecting bolts are installed vertically to the side of the transition plate, pins for fixing the connecting bolts are provided on both sides of the transition plate, and a pin hole for connecting to the pin is provided at the tail end of the connecting bolt.

[0018] Preferably, a water pressure gauge is installed on the main engine water inlet pipe, and a solenoid valve and a needle valve are arranged between the main engine water inlet pipe and each cylinder water inlet branch pipe, the inlet of the solenoid valve is connected to the main engine water inlet pipe, the outlet of the solenoid valve is connected to the inlet of the needle valve, and the outlet of the needle valve is connected to the inlet of the cylinder water inlet branch pipe.

[0019] Preferably, a water level window for observing the water level inside the water tank is provided on the water tank.

[0020] Preferably, a polytetrafluoroethylene sealing ring is provided between the end surface of the coupling body and the feeding cylinder.

[0021] Preferably, a rear end flange is provided on the rear end hole of the feeding body, a sealing gasket for sealing is installed on the rear end flange, and the sealing gasket is fixed to the end face of the rear end flange of the feeding body through a sealing gasket pressing plate.

[0022] Preferably, various types of threaded sleeves and various types of meshing blocks can be installed in combination on the core shaft of the screw core shaft according to process requirements.

[0023] Beneficial effects: The experimental co-rotating parallel twin-screw extruder provided by the present invention has the following beneficial effects:

[0024] 1. The experimental twin-screw extruder equipment of the present invention adopts a miniaturized design, which reduces the input of single test materials and saves test time. Compared with the original test equipment, the material usage is reduced by more than 90%, and the test time is shortened to one fifth of the original, which greatly improves the R&D speed and reduces the R&D cost.

[0025] 2. The present invention integrates the equipment of the experimental twin-screw extruder on the main engine base, which reduces the space occupied by the equipment, has stable operation, and is suitable for the experimental environment of the laboratory.

[0026] 3. The experimental twin-screw extruder equipment of the present invention adopts a miniaturized design and simplifies the design of the gear reducer. The gear reducer adopts a parallel input shaft, a transition shaft, an output shaft A and an output shaft B. Through the meshing relationship of the gears, the two output shafts can rotate in the same direction and in parallel. While meeting the needs of small batch material testing, it simplifies the complexity of the equipment, facilitates operation, and reduces operating noise.

[0027] 4. The experimental twin-screw extruder of the present invention has the functions of medium and large equipment, can simulate the industrial on-site production process, conduct small-batch production and performance testing on the test results in advance, and avoid losses caused by direct production.

[0028] 5. The present invention realizes accurate regulation and control of the test process through the electrical equipment installed in the electrical cabinet and the thermocouples and sensors arranged on the test twin-screw extruder. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0030] Figure 1 It is a front view of the present invention;

[0031] Figure 2 For the present invention Figure 1 A partial enlarged view of the middle A area;

[0032] Figure 3 For the present invention Figure 1 A partial enlarged view of the middle B area;

[0033] Figure 4 For the present invention Figure 1 Right view of;

[0034] Figure 5 For the present invention Figure 4 A partial enlarged view of the middle C area;

[0035] Figure 6 For the present invention Figure 1 Rear view of

[0036] Figure 7 For the present invention Figure 6 A partial enlarged view of the middle D area;

[0037] Figure 8 It is a front view of the gear reduction box of the present invention;

[0038] Fig. 9 The gear reducer of the present invention is along Figure 8 Main section view of the AA section line;

[0039] Among them, 1- shock absorbing pad, 2- host base, 3- electrical cabinet, 4- drive motor, 5- coupling, 6- gear reducer, 7- operation panel bracket, 8- operation panel, 9- reduction motor, 10- feeder bracket, 11- feeder hopper, 12- sealing pad pressure plate, 13- sealing pad, 14- feeding body, 15- feeding screw, 16- blanking box cover, 17- blanking box, 18- spline sleeve, 19- blanking box bracket, 20- screw mandrel, 21- coupling body, 22- sealing ring gland, 23- polytetrafluoroethylene sealing ring, 24- feeding port, 25- electric heater I, 26- first exhaust block, 27- electric heating Heater II, 28-vacuum exhaust chamber, 29-melt temperature thermocouple installation hole, 30-transition plate, 31-porous plate, 32-electric heating tube, 33-filter screen, 34-head body, 35-thermocouple installation hole, 36-head template, 37-pipe clamp, 38-outlet pipe, 39-return pipe, 40-clean water pump, 41-outlet flange, 42-water tank, 43-water level window, 44-water-cooled heat exchanger, 45-water tank return pipe, 46-main engine return main pipe, 47-cylinder return branch pipe, 48-melt pressure sensor installation hole, 49-cylinder bracket, 50-adjusting screw, 51-connecting bolt, 52-vacuum gauge installation hole, 53-exhaust pipe, 54-water inlet branch pipe of cylinder, 55-main engine water inlet main pipe, 56-solenoid valve, 57-needle valve, 58-main engine feeder, 59-feeding cylinder, 60-closing cylinder, 61-exhaust cylinder, 62-extrusion cylinder, 63-pin shaft, 64-stop nail hole, 65-pin shaft hole, 66-main engine cylinder, 67-water pressure gauge, 68-upper box, 69 lower box, 70-front transparent cover, 71-cylindrical roller bearing I, 72-transition shaft, 73-tapered roller bearing I, 74-gear B, 75-needle bearing I, 76-deep groove ball bearing, 77-output shaft B, 78-output shaft A, 79-skeleton oil Seal I, 80-needle bearing II, 81-circular plate sleeve, 82-first serial thrust roller bearing, 83-self-aligning ball bearing, 84-tapered roller bearing II, 85-input shaft, 86-gear A, 87-screw I, 88-input shaft end cover, 89-skeleton oil seal II, 90-cylindrical roller bearing II, 91-screw II, 92-thrust bearing seat, 93-rear end cover, 94-liquid level gauge, 95-air filter, 96-second exhaust stopper, 97-first transmission gear, 98-second transmission gear, 99-third transmission gear, 100-fourth transmission gear, 101-second serial thrust roller bearing. DETAILED DESCRIPTION

[0040] The present invention will be described more clearly and completely below by way of a preferred embodiment in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiment.

[0041] like Figure 1 , Figure 4 , Figure 5 , Figure 6 As shown, an experimental co-directional parallel twin-screw extruder provided by the present invention includes a main body base 2, a driving motor 4, a gear reduction box 6, a main body barrel 66 and a main body feeder 58 are arranged above the main body base 2, two mutually parallel screw core shafts 20 are arranged inside the main body barrel 66, a cooling device for cooling the main body barrel 66 is arranged inside the main body base 2, the driving motor 4 and the gear reduction box 6 are connected by a coupling 5, the gear reduction box 6 and the main body barrel 66 are connected by a coupling body 21, the main body feeder 58 is fixed on the coupling body 21, the output shaft of the gear reduction box 6 is connected to the screw core shaft 20 by a spline sleeve 18, the connecting end of the output shaft of the gear reduction box 6 and the screw core shaft 20 is provided with an external spline matched with the spline sleeve 18, and the output shaft of the gear reduction box 6 is an output shaft A78 and an output shaft B77.

[0042] Shock-absorbing pads 1 are installed under the main engine base 2. The horizontal installation position of the main engine base 2 can be adjusted by adjusting the height of each shock-absorbing pad 1 to make the equipment run smoothly. The lower left side of the main engine base 2 is an electrical cabinet 3. The electrical devices for controlling the operation of the equipment are installed in the electrical cabinet 3. The operation panel 8 is supported by the operation panel bracket 7 and installed on the rear part of the upper plane of the main engine base 2. The panel of the operation panel 8 is installed with indicator lights, temperature control instruments, melt pressure instruments, speed instruments, current instruments, control buttons and speed control knobs, which can facilitate the operator to operate and control the equipment.

[0043] For the convenience of description, Figure 1 The right direction in the figure is forward, Figure 1 The left side in the text is the back, and the front end and the front part in this article refer to Figure 1 In the right direction, the rear end and the back part refer to Figure 1 In the left side direction of the drawing, the main cylinder 66 is supported by two cylinder brackets 49 and installed on the front part of the upper plane of the main base 2. The cylinder bracket 49 is provided with an adjusting screw 50 for adjusting the center height of the main cylinder 66 below the main cylinder 66. The main cylinder 66 is composed of a feeding cylinder 59, a closing cylinder 60, an exhaust cylinder 61 and an extrusion cylinder 62. A thermocouple is provided at the bottom of each cylinder to detect the temperature of each cylinder.

[0044] like Figure 6As shown, the arrangement order of the cylinders of the main cylinder 66 from right to left is: the first cylinder section is the feeding cylinder 59, the second cylinder section is the closing cylinder 60, the third cylinder section is the exhaust cylinder 61, the fourth and fifth cylinder sections are the closing cylinder 60, and the sixth cylinder section is the extrusion cylinder 62; the adjacent cylinders of the main cylinder 66 are connected by screws to form the main cylinder 66, the electric heater I25 is installed on the closing cylinder 60, and the electric heater II27 is installed on the exhaust cylinder 61 and the extrusion cylinder 62. The thermocouples on the closing cylinder 60, the exhaust cylinder 61 and the extrusion cylinder 62 transmit the temperature signals of the corresponding cylinders to the corresponding temperature control instrument, and the temperature control instrument controls the electric heater I25 and the electric heater II27 through the corresponding electrical appliances according to the set process temperature, so that the temperature of each cylinder reaches the set process temperature range.

[0045] A first exhaust stop block 26 is installed at the upper opening of the exhaust cylinder 61. The opening of the exhaust stop block 26 can naturally discharge part of the moisture in the molten high molecular polymer material in the main cylinder 66 to improve the process quality of the high molecular polymer material blending and modification. The sixth section of the main cylinder 66 is the extrusion cylinder 62. A second exhaust stop block 96 is installed at the upper opening of the extrusion cylinder 62. A vacuum exhaust chamber 28 is installed above the second exhaust stop block 96. The exhaust pipe 53 of the vacuum exhaust chamber 28 is connected to an external vacuum exhaust system. A vacuum gauge is installed at the vacuum gauge mounting hole 52 on the exhaust pipe 53 to display the vacuum degree in the vacuum exhaust chamber 28.

[0046] like Figure 2 , Figure 6 As shown, the main feeder 58 is composed of a reduction motor 9, a feeder bracket 10, a feeder hopper 11, a sealing pad pressure plate 12, a sealing pad 13, a feeder body 14 and a feeder screw 15. The front flange of the reduction motor 9 is connected to the vertical plate of the feeder bracket 10, the output shaft of the reduction motor 9 is connected to the rear end of the feeder screw 15, the feeder screw 15 is installed in the feeder body 14, the feeder hopper 11 is connected to the top of the feeder body 14, the bottom of the feeder body 14 is connected to the flat plate of the feeder bracket 10, and the bottom of the feeder bracket 10 is connected to the bottom of the feeder body 14. The upper part of the connecting body 21 is connected to the upper support, and the sealing gasket 13 is installed between the sealing gasket pressure plate 12 and the rear end flange of the feeding body 14. The sealing gasket 13 is used to seal the gap between the rear end hole of the feeding body 14 and the tail of the feeding screw 15 to prevent the material from leaking from the rear end hole of the feeding body 14. The sealing gasket pressure plate 12 is connected to the rear end flange of the feeding body 14 by screws, and the sealing gasket pressure plate 12 is used to fix the sealing gasket 13; the front end of the feeding screw 15 is connected to the blanking box 17, and the material is transported to the main machine cylinder 66 through the blanking box 17.

[0047] The blanking box 17 is installed on the feeding cylinder 59 through the blanking box bracket 19. The feeding cylinder 59 is provided with a feeding port 24 corresponding to the blanking box 17. A blanking box cover 16 is installed on the top of the blanking box 17. When the blanking box cover 16 is opened, the material can be observed entering the feeding cylinder 59 from the feeding port 24.

[0048] like Figure 3 , Figure 6 , Figure 7 As shown, the front end face of the extrusion cylinder 62 is connected to the rear end face of the transition plate 30, and a melt temperature thermocouple mounting hole 29 is provided at the upper end of the transition plate 30, and a melt temperature thermocouple is installed in the melt temperature thermocouple mounting hole 29 to detect the melt temperature of the molten high molecular polymer when it is output from the main cylinder 66; a melt pressure sensor mounting hole 48 is provided at the lower end of the transition plate 30, and a melt pressure sensor is installed in the melt pressure sensor mounting hole 48 to detect the melt pressure of the molten high molecular polymer when it is output from the main cylinder 66; a pin 63 is installed in the pin hole 65 of the transition plate 30, and a stop screw is installed in the stop nail hole 64 of the transition plate 30 to fix the pin 63 in the pin hole 65; the connecting bolt 51 is connected to the pin 63 through the pin hole at its tail end, the rear end face of the porous plate 31 is connected to the front end face of the transition plate 30, and the front end face of the porous plate 31 is connected to the rear end face of the head body 34, and the porous A filter screen 33 is installed in the plate 31; the transition plate 30 is connected to the head body 34 by connecting bolts 51, and the porous plate 31 is fastened and installed between the transition plate 30 and the head body 34; a thermocouple is installed in the thermocouple installation hole 35 at the front end of the head body 34 to detect and control the temperature of the head body 34, and two electric heating tubes 32 are installed in the head body 34, and the electric heating tubes 32 heat and keep the head body 34 warm so that the temperature of the head body 34 is maintained within the process temperature range; the head template 36 is connected to the lower part of the front end of the head body 34, and the molten high molecular polymer material is output from the discharge hole of the head template 36, and the filter screen 33 can filter out impurities in the molten high molecular polymer material to ensure the quality of the high molecular polymer material; loosen the connecting bolts 51, open the head body 34, and take out the porous plate 31 to replace the filter screen 33 with impurities stuck on it.

[0049] like Figure 1As shown, the cooling device is installed on the lower plane of the right side of the main engine base 2, and the main engine cylinder 66 is cooled by the outlet pipe 38, the return pipe 39, and the main engine water inlet pipe 55 and the main engine return pipe 46 arranged in parallel on both sides of the main engine cylinder 66. The main engine water inlet pipe 55 and the main engine return pipe 46 are fixed to the upper surface of the main engine base 2 by pipe clamps 37. The cooling device includes a clean water pump 40, a water tank 42, and a water-cooled heat exchanger 44. The water tank 42 is used to store internal circulating cooling water. A water outlet flange 41 and a water tank return pipe 45 are arranged on the box body of the water tank 42. The water outlet flange 41 of the water tank 42 is connected to the water inlet of the clean water pump 40, and the water outlet of the clean water pump 40 is connected to the inlet of the outlet pipe 38, and the outlet of the outlet pipe 38 is connected to the inlet of the main engine water inlet pipe 55.

[0050] like Figure 5 , Figure 6 As shown, a water pressure gauge 67 is installed on the main water inlet pipe 55 of the main engine, and the water pressure gauge 67 displays the water pressure in the main water inlet pipe 55 of the main engine and monitors the working status of the clean water pump 40. A number of branch cooling pipelines corresponding to the number of cylinders are arranged between the main water inlet pipe 55 of the main engine and the main water return pipe 46 of the main engine, and the branch cooling pipelines include a cylinder water inlet branch pipe 54 and a cylinder water return branch pipe 47. A cooling water channel is arranged inside each cylinder section. A solenoid valve 56 and a needle valve 57 are arranged between the main water inlet pipe 55 of the main engine and each cylinder water inlet branch pipe 54. The main water inlet pipe 55 of the main engine is connected to the inlet of each solenoid valve 56 respectively. The outlet of the magnetic valve 56 is respectively connected to the inlet of its needle valve 57, the outlet of each needle valve 57 is respectively connected to the inlet of its cylinder water inlet branch pipe 54, the outlet of each cylinder water inlet branch pipe 54 is respectively connected to the inlet of the cooling water channel inside the cylinder, the outlet of each cylinder internal cooling water channel is respectively connected to the inlet of its cylinder return water branch pipe 47, the outlet of each cylinder return water branch pipe 47 is respectively connected to the main engine return water main 46, the main engine water inlet main 55 and the main engine return water main 46 can be connected through the cylinder water inlet branch pipe 54, the solenoid valve 56, the needle valve 57, the cooling water channel inside the cylinder and the cylinder return water branch pipe 47.

[0051] The cooling principle of the cooling device is as follows: when the equipment is running, the clean water pump 40 is operated, and the internal circulating cooling water of the water tank 42 enters the main water inlet pipe 55 of the main machine through the water outlet flange 41, the clean water pump 40, and the water outlet pipe 38. The mixing and shearing effect of the screw core shaft 20 on the high molecular polymer material will cause the temperature of the main engine barrel 66 to rise. When the thermocouple of each barrel detects that its barrel temperature exceeds the temperature set by its temperature control instrument, the temperature control instrument controls the corresponding solenoid valve 56 on the barrel branch cooling pipeline, and the solenoid valve 56 is opened, so that the internal circulating cooling water of the main engine water inlet pipe 55 enters the internal cooling water channel of the barrel through the solenoid valve 56, the needle valve 57, and the barrel water inlet branch pipe 54 to cool the barrel to prevent the barrel from overheating and ensure that the temperature of the barrel is controlled within the set process temperature range; by adjusting each needle valve 57, the water flow entering the internal cooling water channel of the barrel can be turned off or adjusted to facilitate the control of the temperature of the barrel; the internal circulating cooling water flows out from the internal cooling water channel of each barrel to its barrel return water branch pipe 47, enters the main engine return water pipe 46, and the internal circulating cooling water is returned to the water tank 42 through the main engine return water pipe 46, the return pipe 39, the water-cooled heat exchanger 44, and the water tank return water pipe 45.

[0052] like Figure 2 As shown, the front end face of the gear reducer 6 is connected to the rear end face of the coupling body 21, the front end face of the coupling body 21 is connected to the rear end face of the feeding barrel 59, a polytetrafluoroethylene sealing ring 23 is installed between the front end hole of the coupling body 21 and the tail of the screw core shaft 20, the polytetrafluoroethylene sealing ring 23 is used to seal the rear end face of the feeding barrel 59 to prevent material from leaking from the rear end face of the feeding barrel 59, and a sealing ring gland 22 is installed at the front end hole of the coupling body 21, and the sealing ring gland 22 is used to fix the polytetrafluoroethylene sealing ring 23.

[0053] like Figure 8 , Fig. 9As shown, the housing of the gear reducer 6 is composed of an upper housing 68 and a lower housing 69 connected and assembled. An input shaft 85, an output shaft A78, an output shaft B77 and a transition shaft 72 are arranged in parallel in the housing of the gear reducer 6. The mounting holes of the input shaft 85, the output shaft A78, the output shaft B77 and the transition shaft 72 are processed on the housing of the gear reducer 6. A circular plate insert sleeve 81 is inlaid and installed at the front end of the housing of the gear reducer 6. The mounting holes of the needle bearing II80 and the cylindrical roller bearing I71 are processed on the circular plate insert sleeve 81. The mounting holes of the input shaft 85 are used to install and position the input shaft 85. A tapered roller bearing is used between the input shaft 85 and the housing. II84 is connected in matching connection; the mounting hole of the output shaft A78 is used to install and position the output shaft A78, the gear A86, the thrust bearing seat 92 and the first series thrust roller bearing 82, the cylindrical roller bearing II90, and the centering ball bearing 83, and the needle bearing II80 is installed and positioned in the needle bearing mounting hole of the circular plate sleeve 81; the mounting hole of the output shaft B77 is used to install and position the output shaft B77, the second series thrust roller bearing 101, the needle bearing I75, and the deep groove ball bearing 76; the mounting hole of the transition shaft 72 is used to install and position the transition shaft 72, the gear B74, and the tapered roller bearing I73, and the cylindrical roller bearing I71 is installed and positioned in the cylindrical roller bearing mounting hole of the circular plate sleeve 81.

[0054] The input end of the input shaft 85 is connected to the output shaft of the driving motor 4 by the coupling 5. Tapered roller bearings II84 are respectively installed on the shaft necks at both ends of the input shaft 85 to withstand the radial force and axial force of the input shaft 85. The input shaft end cover 88 is fixedly installed at the input shaft 85 on the rear end face of the housing. The input shaft end cover 88 is fixed to the housing by screws I87. A skeleton oil seal II89 is installed in the input shaft end cover 88 to seal the lubricating oil in the housing at the input shaft 85.

[0055] The input shaft 85 is provided with a first transmission gear 97 meshing with the gear A86. The first transmission gear 97 is a right-handed helical angle gear, and the gear A86 is a left-handed helical angle gear. The gear A86 is installed and fixed to the rear of the output shaft A78 by a flat key. The cylindrical roller bearing II90 is installed and fixed to the rear end of the output shaft A78 and the corresponding output shaft A78 mounting hole located in the box body. The cylindrical roller bearing II90 is used to bear the radial force of the output shaft A78; the centering ball bearing 83 is installed and fixed to the middle and rear part of the output shaft A78 and the corresponding output shaft A78 mounting hole located in the box body. In the mounting hole of the output shaft A78, the centering ball bearing 83 is used to bear the radial force and axial force of the output shaft A78; two needle bearings II80 are installed and fixed at the front of the output shaft A78 and in the needle bearing mounting hole of the circular plate sleeve 81. The two needle bearings II80 are used to bear the radial force of the output shaft A78. The skeleton oil seal I79 is installed and fixed at the front of the output shaft A78 and the front end of the needle bearing mounting hole of the circular plate sleeve 81 to seal the lubricating oil in the box at the output shaft A78. The end of the output shaft A78 is processed with an external spline.

[0056] The first serial thrust roller bearing 82 is connected to the rear end face of the output shaft A78. A thrust bearing seat 92 for mounting the first serial thrust roller bearing 82 is provided on the housing. The thrust bearing seat 92 is mounted in the mounting hole of the corresponding output shaft A78 of the housing and is fastened to the rear end face of the housing by screws II91. A rear end cover 93 is mounted on the rear end face of the thrust bearing seat 92. The rear end cover 93 is used to fix and limit the first serial thrust roller bearing 82 and seal the rear end face of the thrust bearing seat 92.

[0057] A second transmission gear 98 coaxial with gear A is provided on the output shaft A78, and the second transmission gear 98 meshes with gear B74. The second transmission gear 98 is a left-handed spiral angle gear, and gear B74 is a right-handed spiral angle gear. Gear B74 is installed and fixed at the rear end of the transition shaft 72 by a flat key. Two tapered roller bearings I73 are installed and fixed at the rear of the transition shaft 72 and in the corresponding transition shaft 72 mounting holes of the box body. The two tapered roller bearings I73 are used to bear the radial force and axial force of the transition shaft 72. The cylindrical roller bearing I71 is installed and fixed at the front end of the transition shaft 72 and in the cylindrical roller bearing mounting hole of the circular plate sleeve 81. The cylindrical roller bearing I71 is used to bear the radial force of the transition shaft 72. A third transmission gear 99 coaxial with gear B74 is provided on the transition shaft 72.

[0058] The output shaft B77 is provided with a fourth transmission gear 100 meshing with the third transmission gear 99. The third transmission gear 99 is a right-handed spiral angle gear, and the fourth transmission gear 100 is a left-handed spiral angle gear; the rear end face of the output shaft B77 is connected to the second serial thrust roller bearing 101, and the second serial thrust roller bearing 101 is installed and fixed in the corresponding output shaft B77 mounting hole of the housing. The second serial thrust roller bearing 101 bears the axial rearward thrust of the output shaft B77. The output shaft B77 is installed with a needle roller bearing I75 on the journal at the rear end of the fourth transmission gear 100. The output shaft B77 is installed with a needle roller bearing I75 and a deep groove ball bearing 76 on the front end journal of the fourth transmission gear 100 in sequence. The needle roller bearing I75 is used to bear the radial force of the output shaft B77, and the deep groove ball bearing 76 is used to bear the radial force and axial force of the output shaft B77. The end of the output shaft B77 is also processed with an external spline.

[0059] like Figure 8 , Fig. 9 As shown, the front transparent cover 70 is installed on the front end surface of the circular plate sleeve 81. The front transparent cover 70 is used to seal the front end surface of the circular plate sleeve 81. A skeleton oil seal I79 is also installed in the front transparent cover 70. The skeleton oil seal I79 is used to seal the lubricating oil in the box body at the output shaft B77.

[0060] A liquid level gauge 94 and an air filter 95 are provided on the housing of the gear reducer 6. The liquid level gauge 94 is installed on the side of the housing of the gear reducer 6 and can display the oil level inside the housing of the gear reducer 6 for observing the oil level condition inside the housing. The air filter 95 is installed on the upper part of the upper housing 68 of the gear reducer 6 and can keep the interior of the housing of the gear reducer 6 connected to the external atmosphere to discharge the gas in the lubricating oil and avoid the formation of an atmospheric pressure difference between the interior of the housing and the external atmosphere.

[0061] The working principle of the gear reducer 6 is as follows: the output shaft of the driving motor 4 drives the input shaft 85 to rotate forwardly through the coupling 5, the first transmission gear 97 of the input shaft 85 drives the gear A86 to rotate reversely through the meshing gear A86, the gear A86 drives the output shaft A78 to rotate through the flat key, the second transmission gear 98 on the output shaft A78 drives the gear B74 to rotate forwardly through the meshing gear B74, the gear B74 drives the transition shaft 72 to rotate forwardly through the flat key, and drives the third transmission gear 99 of the transition shaft 72 to rotate, the third transmission gear 99 drives the output shaft B77 to rotate by meshing with the fourth transmission gear 100 on the output shaft B77, so that the output shaft A78 and the output shaft B77 rotate in parallel at the same speed and in the same direction.

[0062] When the experimental co-rotating parallel twin-screw extruder provided by the present invention is used, the process temperature of each barrel of the main barrel 66 is set on the temperature control instrument of the operation panel 8, and the thermocouple at the bottom of each barrel detects the temperature of the barrel. When the temperature of each barrel reaches the set process temperature, the drive motor 4 is started on the operation panel 8, and the clean water pump 40 is started at the same time to form internal circulating cooling water, which can cool the main barrel 66 to prevent each barrel from overheating; the output shaft of the drive motor 4 drives the input shaft 8 of the gear reduction box 6 through the coupling 5 5 rotates, and the rotational torque of the input shaft 85 is evenly distributed to the output shaft A78 and the output shaft B77 of the gear reducer 6 through the gear reducer 6, and the output shaft A78 and the output shaft B77 rotate in parallel at the same speed and in the same direction; when the gear reducer 6 is running, the reduction motor 9 of the host feeder 58 is started on the operation panel 8, and the reduction motor 9 drives the feeding screw 15 to rotate, and the materials in the feeder hopper 11 and the feeding body 14 are transported to the blanking box 17 by the feeding screw 15, and the materials enter the feeding cylinder 59 through the blanking box 17 and the feeding port 24.

[0063] The output shaft A78 and the output shaft B77 drive the two screw core shafts 20 to rotate in parallel at the same speed and in the same direction in the main barrel 66 through the spline sleeve 18 respectively. The material components of the high molecular polymer at the feeding port 24 of the feeding barrel 59 are transported into the main barrel 66 by the rotating two screw core shafts 20. Under the action of the two screw core shafts 20 and the main barrel 66, the material components in the main barrel 66 complete the process of transporting, melting, mixing, shearing, polymerization, reaction and the like of the material components. The first exhaust stop block 26 installed at the opening of the exhaust barrel 61 can naturally discharge part of the moisture in the molten high molecular polymer material in the main barrel 66 to improve the process quality of the high molecular polymer material blending and modification. The second exhaust stop block 96 and the vacuum exhaust chamber 28 installed at the opening of the extrusion barrel 62 can efficiently discharge the volatile matter and the bubbles contained in the molten high molecular polymer material in the main barrel 66 through the external vacuum exhaust system to ensure the process quality of the high molecular polymer material blending and modification. Under the push of the two screw core shafts 20, the molten polymer material establishes a certain extrusion pressure at the front end of the extrusion barrel 62, so that the molten polymer material can pass through the internal flow channel of the transition plate 30, the filter screen 33, the mesh of the porous plate 31, and the internal flow channel of the head body 34, and finally be smoothly extruded from the discharge hole of the head template 36.

[0064] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An experimental co-rotating parallel twin-screw extruder, characterized in that: The invention comprises a main machine base (2), a driving motor (4), a gear reduction box (6), a main machine barrel (66) and a main machine feeder (58) are arranged above the main machine base (2), two screw core shafts (20) parallel to each other are arranged inside the main machine barrel (66), a cooling device for cooling the main machine barrel (66) is arranged inside the main machine base (2), the driving motor (4) and the gear reduction box (6) are connected via a coupling (5), the gear reduction box (6) and the main machine barrel (66) are connected via a coupling body (21), and the main machine feeder (58) is fixed on the coupling body (21); The housing of the gear reduction box (6) is composed of an upper housing (68) and a lower housing (69) connected together. An input shaft (85), an output shaft A (78), an output shaft B (77) and a transition shaft (72) are arranged in parallel in the housing. The gear reduction box (6) is provided with mounting holes corresponding to the respective shafts on the housing. The input shaft (85), the output shaft A (78), the output shaft B (77) and the transition shaft (72) are connected to the mounting holes through bearings. The input shaft (85), the output shaft A (78), the output shaft B (77) and the transition shaft (72) are meshed with gears. The input shaft (85) is connected to the output shaft of the driving motor (4) through a coupling (5). The output shaft A (78) and the output shaft B (77) are respectively connected to a screw core shaft (20) through a spline sleeve (18). The connection ends of the output shaft A (78), the output shaft B (77) and the screw core shaft (20) are all located in the coupling body (21). The main cylinder (66) comprises a feeding cylinder (59), a closing cylinder (60), an exhaust cylinder (61) and an extrusion cylinder (62); a thermocouple for detecting the cylinder temperature is arranged below each cylinder; the feeding cylinder (59), the closing cylinder (60) and the exhaust cylinder (61) are connected in sequence; a plurality of closing cylinders (60) are arranged between the exhaust cylinder (61) and the extrusion cylinder (62); an electric heater I (25) is installed on each closing cylinder (60); and electric heaters II (27) are installed on the exhaust cylinder (61) and the extrusion cylinder (62) respectively; The host feeder (58) comprises a reduction motor (9), a feeder hopper (11), a feeder screw (15), a feeder body (14) and a feeder bracket (10), wherein the feeder body (14) is fixed to the coupling body (21) via the feeder bracket (10), the feeder hopper (11) is installed above the feeder body (14), the reduction motor (9) is installed horizontally, the front end flange of the reduction motor (9) is connected to the vertical plate of the feeder bracket (10), the output shaft of the reduction motor (9) passes through the vertical plate of the feeder bracket (10) and is connected to the rear end of the feeder screw (15), and the two end surfaces of the feeder body (14) are provided for installing the feeder screw (15) ), the rear end hole and the front end hole of the feeding body (14) are located between the feeding body (14) and the feeder bracket (10), the feeding screw (15) passes through the rear end hole and the front end hole of the feeding body (14) in sequence, the front end of the feeding screw (15) is connected to a blanking box (17) for feeding materials to the main machine barrel (66), the front end of the feeding screw (15) is located in the blanking box (17), a blanking box cover plate (16) is provided on the upper part of the blanking box (17), the blanking box (17) is fixed to the feeding barrel (59) through the blanking box bracket (19), and a feeding port (24) corresponding to the bottom of the blanking box (17) is provided on the top of the feeding barrel (59); The cooling device comprises a clean water pump (40) for conveying internal circulating cooling water, a water tank (42) for storing the internal circulating cooling water, and a water-cooled heat exchanger (44) for exchanging heat between the internal circulating cooling water and the outside. The water tank (42) comprises a water outlet flange (41) and a water tank return pipe (45). The water inlet of the clean water pump (40) is connected to the water outlet flange (41). The water outlet of the clean water pump (40) is connected to the water outlet pipe (38). The water outlet of the water-cooled heat exchanger (44) is connected to the water tank return pipe (45). The water inlet of the water-cooled heat exchanger (44) is connected to the return pipe (39). Main engine inlet flanges for cooling the main engine cylinder (66) are installed in parallel on both sides of the main engine cylinder (66). The main water pipe (55) and the main engine water return pipe (46) are fixed to the upper plane of the main engine base (2) through a pipe clamp (37). The main engine water inlet pipe (55) is connected to the water outlet pipe (38), and the main engine water return pipe (46) is connected to the water return pipe (39). Each cylinder of the main engine cylinder (66) is provided with a cylinder water inlet branch pipe (54) and a cylinder water return branch pipe (47). Cooling water channels are provided inside the cylinders. The main engine water inlet pipe (55) and the main engine water return pipe (46) are connected through the cylinder water inlet branch pipe (54), the solenoid valve (56), the needle valve (57), the cooling water channel inside the cylinder, and the cylinder water return branch pipe (47). A transition plate (30) communicating with the main cylinder (66) is disposed on the front end surface of the main cylinder (66); a cylinder support (49) for supporting the cylinder is disposed at the bottom of the main cylinder (66); and an adjustment screw (50) for adjusting the center height of the main cylinder (66) is disposed on the cylinder support (49) below the main cylinder (66); A first exhaust block (26) is installed at the upper opening of the exhaust cylinder (61), a second exhaust block (96) is installed at the upper opening of the extrusion cylinder (62), a vacuum exhaust chamber (28) is installed above the second exhaust block (96), the vacuum exhaust chamber (28) is connected to an external vacuum exhaust system via an exhaust pipe (53) on its side, and a vacuum gauge installation hole (52) for installing a vacuum gauge is provided on the exhaust pipe (53); The head body (34) is in communication with the transition plate (30) and the extrusion barrel (62); the transition plate (30) and the porous plate (31) are arranged between the extrusion barrel (62) and the head body (34); the rear end face of the transition plate (30) is connected to the front end face of the extrusion barrel (62); the rear end face of the porous plate (31) is connected to the front end face of the transition plate (30); the front end face of the porous plate (31) is connected to the rear end face of the head body (34); a filter screen (33) is installed in the porous plate (31); and the head body (34) is fixedly connected to the transition plate (30) by connecting bolts (51); An electric heating tube (32) for heating and heat preservation is arranged inside the head body (34); a thermocouple mounting hole (35) for mounting a thermocouple is arranged at the front end of the head body (34); a head template (36) in communication with the head body (34) is arranged at the lower part of the front end of the head body (34); and the head template (36) is provided with a discharge hole.

2. The experimental co-rotating parallel twin-screw extruder according to claim 1, characterized in that: An operation panel (8) is fixed to the upper surface of the host base (2); the operation panel (8) is supported and mounted on the upper plane of the host base (2) by an operation panel bracket (7); an electrical cabinet (3) for mounting electrical devices is arranged beside the cooling device on the host base (2); and a shock-absorbing pad (1) for adjusting the horizontal mounting position of the host base (2) is arranged at the bottom of the host base (2).

3. The experimental co-rotating parallel twin-screw extruder according to claim 1, characterized in that: A liquid level gauge (94) is provided on the side of the housing of the gear reduction box (6); an air filter (95) is provided on the upper portion of the upper housing (68) for connecting the housing with the atmosphere; a first transmission gear (97) is provided on the input shaft (85); a gear A (86) meshing with the first transmission gear (97) is fixed on the output shaft A (78); a second transmission gear (98) coaxial with the gear A (86) is provided on the output shaft A (78); a gear B (74) meshing with the second transmission gear (98) is fixed on the transition shaft (72); a third transmission gear (99) coaxial with the gear B (74) is provided on the transition shaft (72); and a fourth transmission gear (100) meshing with the third transmission gear (99) is provided on the output shaft B (77).

4. The experimental co-rotating parallel twin-screw extruder according to claim 1, characterized in that: The transition plate (30) is provided with a melting temperature thermocouple mounting hole (29) at the upper end and a melting pressure sensor mounting hole (48) at the lower end. The connecting bolts (51) are vertically mounted on the side of the transition plate (30). Pins (63) for fixing the connecting bolts (51) are provided on both sides of the transition plate (30). The tail end of the connecting bolt (51) is provided with a pin hole for connecting with the pin (63).

5. The experimental co-rotating parallel twin-screw extruder according to claim 1, characterized in that: A water pressure gauge (67) is installed on the main engine water inlet pipe (55), and a solenoid valve (56) and a needle valve (57) are arranged between the main engine water inlet pipe (55) and each cylinder water inlet branch pipe (54). The inlet of the solenoid valve (56) is communicated with the main engine water inlet pipe (55), the outlet of the solenoid valve (56) is connected to the inlet of the needle valve (57), and the outlet of the needle valve (57) is connected to the inlet of the cylinder water inlet branch pipe (54).

6. The experimental co-rotating parallel twin-screw extruder according to claim 1, characterized in that: The water tank (42) is provided with a water level window (43) for observing the water level inside the water tank (42).

7. The experimental co-rotating parallel twin-screw extruder according to claim 1, characterized in that: A polytetrafluoroethylene sealing ring (23) is provided between the connecting body (21) and the end surface of the feeding cylinder (59).

8. The experimental co-rotating parallel twin-screw extruder according to claim 1, characterized in that: A rear flange is provided on the rear end hole of the feeding body (14) of the main feeder (58), a sealing gasket (13) for sealing is installed on the rear end flange, and the sealing gasket (13) is fixed to the rear end flange end face of the feeding body (14) through a sealing gasket pressing plate (12).

9. The experimental co-rotating parallel twin-screw extruder according to claim 1, characterized in that: Various types of threaded sleeves and various types of meshing blocks are installed in combination on the core shaft of the screw core shaft (20) according to process requirements.

Images