CN116691039B - Double-screw extrusion tablet press for EVA material and use method thereof - Google Patents
Double-screw extrusion tablet press for EVA material and use method thereof Download PDFInfo
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- CN116691039B CN116691039B CN202310970028.7A CN202310970028A CN116691039B CN 116691039 B CN116691039 B CN 116691039B CN 202310970028 A CN202310970028 A CN 202310970028A CN 116691039 B CN116691039 B CN 116691039B
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- 238000001125 extrusion Methods 0.000 title claims abstract description 272
- 239000000463 material Substances 0.000 title claims abstract description 113
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000002994 raw material Substances 0.000 claims abstract description 112
- 238000010438 heat treatment Methods 0.000 claims description 31
- 230000007246 mechanism Effects 0.000 claims description 31
- 238000004026 adhesive bonding Methods 0.000 claims description 25
- 230000005540 biological transmission Effects 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 239000012141 concentrate Substances 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 2
- 238000009825 accumulation Methods 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract description 3
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 239000000203 mixture Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 208000032765 Device extrusion Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000035553 feeding performance Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/06—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices
- B29B7/10—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary
- B29B7/12—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with single shaft
- B29B7/16—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with single shaft with paddles or arms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0021—Combinations of extrusion moulding with other shaping operations combined with joining, lining or laminating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/287—Raw material pre-treatment while feeding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/69—Filters or screens for the moulding material
- B29C48/693—Substantially flat filters mounted at the end of an extruder screw perpendicular to the feed axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/802—Heating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention relates to the technical field of tablet presses, in particular to a double-screw extrusion tablet press for EVA materials and a use method thereof. According to the invention, through the arrangement of the quantitative feeding component, the descending speed of raw materials can be effectively controlled, so that the speed of the raw materials entering the extrusion cavity is gradually changed, the condition that the exhaust port is in material overflow due to too fast discharging is avoided, and after the raw materials enter the extrusion cavity, effective preheating work can be performed when the extrusion screw rotates reversely, and the condition that the extrusion screw runs unsmoothly due to excessive accumulation of the raw materials in the extrusion cavity is avoided.
Description
Technical Field
The invention relates to the field of tablet presses, in particular to a double-screw extrusion tablet press for EVA materials and a using method thereof.
Background
The double-screw extruder is developed on the basis of a single-screw extruder, and has been widely applied to the molding processing of extruded products due to the characteristics of good feeding performance, mixing plasticizing performance, exhaust performance, extrusion stability and the like.
In the publication CN218366051U a twin screw extrusion tablet press for EVA material is disclosed, comprising: organism, squeeze roll, returning charge mechanism, feeder hopper and inserted block, organism internally mounted has the squeeze roll, organism top surface is connected with returning charge mechanism.
However, the twin-screw extrusion tablet press still has certain defects when in use, the twin-screw extrusion tablet press is usually provided with an exhaust port, when extrusion work is carried out, the exhaust port can leak along with the service life of the twin-screw extrusion tablet press, commonly called exhaust port material discharge, and the twin-screw extrusion tablet press cannot solve the problem that the exhaust port material discharge occurs.
Vent emissions are mainly caused by:
1. the raw materials are fed too quickly;
2. the raw materials are not heated enough and are not plasticized at the exhaust port;
3. the screen is blocked more, and the pressure of the machine head is increased.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a double-screw extrusion tablet press for EVA materials and a use method thereof.
In order to achieve the above purpose, the invention adopts the following technical scheme: the utility model provides a twin-screw extrusion tablet press that EVA material was used, includes EVA material extruder, PA material extruder and veneer device, the EVA material extruder is located the one end of veneer device, and the PA material extruder is located one side of veneer device, and the output of EVA material extruder is provided with the cooling tank, and the output of veneer device also is provided with the cooling tank, and the veneer device is used for carrying out the veneer with the material that EVA material extruder and PA material extruder extruded.
Preferably: EVA material extruder includes the base and installs the extrusion case in the base top, extrusion cavity has been seted up to the inside of extrusion case, and two extrusion screw rods that are used for extrusion raw materials are installed to extrusion cavity internal rotation, and extrusion screw rod's direction of rotation can be adjusted, and the inside of extrusion case inlays and is equipped with the heating ring that is used for heating the raw materials, and extrusion case's one end intercommunication has extrusion die, and extrusion die is used for carrying out the preforming work to molten EVA material, and extrusion case keeps away from extrusion die's one end top and is provided with "funnel-shaped" feeder hopper, feeder hopper and extrusion cavity intercommunication, and extrusion cavity keeps away from the one end top intercommunication of feeder hopper and has the gas vent.
Preferably: the section of extrusion cavity is "telescope" form, and two extrusion screw rotates respectively to be connected in the both sides of extrusion cavity, and extrusion screw's one end runs through the tip wallboard of extrusion case, and extrusion screw and extrusion case's tip wallboard rotate and cup joint, and extrusion screw runs through the one end transmission of extrusion case and is connected with drive mechanism, and drive mechanism is used for adjusting extrusion screw's rotation direction, and drive mechanism and extrusion case's one end fixed connection, drive mechanism's output shaft and extrusion screw fixed connection, and extrusion cavity is close to drive mechanism's one end fixedly connected with end plate, and the inclined groove has been seted up to drive mechanism's one end was kept away from to the end plate.
Preferably: the top one end fixedly connected with portal frame of extrusion case, the top center department of portal frame rotates and cup joints the axis of rotation, the top transmission of axis of rotation is connected with driving motor and the top wallboard of axis of rotation and driving motor's output shaft fixed connection, the equal fixedly connected with puddler in middle section department both sides of axis of rotation, the one end fixedly connected with swash plate of axis of rotation is kept away from to the puddler, the inner wall butt on swash plate and feeder hopper inclined plane, the bottom of axis of rotation is provided with quantitative feeding subassembly.
Preferably: the quantitative feeding assembly comprises a spiral feeding plate, the spiral feeding plate is fixedly sleeved on the side wall of the bottom end of the rotating shaft, the spiral feeding plate is located at the communicating position of the feeding hopper and the extrusion cavity, the bottom end wall plate of the rotating shaft is provided with two circular tables with isosceles trapezoid cross sections, the contact surfaces of the two circular tables are mirror image, the circular tables are fixedly connected with a plurality of stirring plates on the inclined surfaces of the side edges of the circular tables, and the upper bottom surface of the circular table located above is fixedly connected with the bottom wall plate of the rotating shaft.
Preferably: the one end that the feeder hopper was kept away from at extrusion case top is provided with the gas vent, and the gas vent is kept away from the one end intercommunication of feeder hopper with extrusion cavity, has seted up the discharge gate on the one end wallboard that the feeder hopper was kept away from to extrusion cavity, and the discharge gate is located the tip center department of extrusion cavity with extrusion cavity intercommunication and both intercommunication department, and the one end that the discharge gate is close to extrusion cavity inlays and is equipped with the screen cloth, and the one end intercommunication that the feeder hopper was kept away from to the discharge gate has rectangular box, rectangular box and extrusion die intercommunication.
Preferably: the inside sliding connection of rectangle box has the pressurization slide, and the equal fixedly connected with spacing slide bar in one side both ends that the discharge gate was kept away from to the pressurization slide, and spacing slide bar runs through the rectangle box and keeps away from the lateral wall board of feeder hopper, has cup jointed the spring on the spacing slide bar, and the both ends of spring are fixed respectively and are got in touch and on the lateral wall of one side inner wall that the feeder hopper was kept away from to the rectangle box and the pressurization slide, and the intercommunication has the rectangular pipe on the one end bottom wall board that the rectangle box is close to the discharge gate, and the one end and the input intercommunication of extrusion die of rectangle box are kept away from to the rectangular pipe.
Preferably: an electromagnetic plate valve is arranged at the communication part of the rectangular pipe and the inner cavity of the rectangular box, the electromagnetic plate valve is electrically connected with a contact switch, the contact switch is fixedly connected with one end of a supporting rod, the contact switch is movably supported against a wall plate at the center of the pressurizing slide plate, the outside of the abutting rod is provided with threads, the abutting rod is in threaded connection with a side wall plate of the rectangular box, which is far away from the feed hopper, and a plurality of air holes for maintaining air pressure balance are formed in a wall plate of one end of the rectangular box, which is far away from the feed hopper.
Preferably: the center department one side of base is provided with the fan, the output intercommunication of fan has built-in pipe, the inside at the base is seted up to built-in pipe, the one end intercommunication that the fan output was kept away from to built-in pipe has the three-way valve, the three-way valve is provided with two outputs and two outputs intercommunication respectively has the outlet duct and is used for the standpipe that the feeder hopper was preheated, the one end intercommunication that the three-way valve was kept away from to the outlet duct has bellows, bellows fixed connection is on the top wallboard of base, a plurality of round holes that are used for giving vent to anger have been seted up to one side that the bellows is close to extrusion die, the round hole is used for cooling down the EVA material after the extrusion die carries out the preforming work.
Preferably: the inside center department of extrusion case has seted up the annular, and the top center department of annular inlays and has been equipped with the thermometer, and the thermometer inlays and establishes in the extrusion incasement, and the standpipe is kept away from the one end and the annular intercommunication of three-way valve, and the two intercommunication department is located the annular one end bottom of keeping away from the feeder hopper, and the one end top intercommunication that the annular is close to the feeder hopper has communicating pipe, and hollow groove has been seted up to the inside of feeder hopper, and the one end and the hollow groove intercommunication of keeping away from the annular of communicating pipe, and the gas outlet has been seted up at the one end top of annular in the hollow groove of keeping away from, gas outlet and hollow groove intercommunication, and the one end that the hollow groove was kept away from to the gas outlet is provided with the dust screen.
The application method of the double-screw extrusion tablet press for EVA materials comprises the following steps:
step one: the raw materials prepared by adding EVA materials into the feed hopper, then preheating the extrusion chamber through the heating ring by starting the heating ring, and controlling the extrusion screw to reversely rotate after starting the heating ring, wherein the extrusion screw concentrates the raw materials at one end of the extrusion box far away from the extrusion die;
step two: after the preheating work is finished in the extrusion cavity, controlling the extrusion screw to rotate positively, and conveying materials in the direction close to the extrusion die by the extrusion screw, wherein in the process, the raw materials are melted and mixed;
step three: as the extrusion screw rotates, the feedstock is fed into an extrusion die, through which it is subsequently extruded into a sheet-like product.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, through the arrangement of the quantitative feeding component, the descending speed of raw materials can be effectively controlled, so that the speed of the raw materials entering the extrusion chamber is gradually changed, the situation that the exhaust port is used for discharging too fast is avoided, after the raw materials enter the extrusion chamber, effective preheating work can be carried out when the extrusion screw reversely rotates, the situation that the extrusion screw is not smooth in operation due to excessive accumulation of the raw materials in the extrusion chamber is avoided, besides the descending speed of the raw materials can be controlled by the quantitative feeding component, the secondary stirring is carried out on the materials collected at one end of the extrusion chamber close to the transmission mechanism during the reverse rotation of the extrusion screw, the accumulated raw materials are scattered, the raw materials can be fully and uniformly preheated, and the situation that the raw materials are not thoroughly melted later due to insufficient preheating is avoided.
2. According to the invention, the heating ring is arranged, so that the raw materials can be effectively heated, and the raw materials can be sufficiently heated and melted in the subsequent spiral extrusion process, the condition that the exhaust port is overflowed due to insufficient heating of the raw materials is avoided, and the thermometer can effectively detect the temperature of the heating ring in the process, so that the heating temperature of the heating ring is effectively monitored.
3. According to the invention, through the arrangement of the pressurizing ring plate, after the heated and extruded raw materials enter the rectangular box, the pressurizing slide plate is extruded, and the reactive force applied to the pressurizing slide plate by the spring is utilized, so that the raw materials entering the rectangular box can be effectively extruded for the second time, on one hand, the raw materials can be prevented from generating bubbles inside the raw materials after being melted and extruded due to contact with outside air after leaving the extruding box, on the other hand, the pressure in the rectangular box can be ensured by the spring, after the pressure is ensured, the raw materials can not exist bubbles after exiting the extruding die, and on the other hand, the pressurizing slide plate can realize back flushing of the screen, and the condition that the exhaust port is blocked to cause material discharge is avoided.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a rear elevational view of the overall structure of the present invention;
FIG. 3 is a schematic cross-sectional view of the structure of the extrusion box of the present invention;
FIG. 4 is an enlarged schematic view of the structure of the portion A shown in FIG. 3 according to the present invention;
FIG. 5 is an enlarged schematic view of the structure of the portion B shown in FIG. 3 according to the present invention;
FIG. 6 is an enlarged schematic view of the structure of the portion C shown in FIG. 3 according to the present invention;
FIG. 7 is an enlarged schematic view of the structure of the portion D shown in FIG. 3 according to the present invention;
FIG. 8 is a schematic cross-sectional view of the ring groove of the present invention;
FIG. 9 is a schematic view of a connection structure of a rotating shaft according to the present invention;
FIG. 10 is a schematic view of the overall structure of the rectangular box of the present invention;
FIG. 11 is a schematic cross-sectional view of the rectangular box of the present invention;
FIG. 12 is a schematic view of the overall structure of the end plate of the present invention;
FIG. 13 is a view showing the effect of the present invention in actual production;
fig. 14 is a view showing the effect of the gluing device of the present invention in gluing.
In the figure: 1. a base; 2. an extrusion box; 3. a transmission mechanism; 4. a wind box; 5. a feed hopper; 6. a thermometer; 7. an exhaust port; 8. a rectangular box; 9. a butt joint rod; 10. an extrusion die; 11. a limit slide bar; 12. a blower; 13. a communicating pipe; 14. a portal frame; 15. a driving motor; 16. a rotating shaft; 17. a three-way valve; 18. an end plate; 19. an extrusion chamber; 20. extruding a screw; 21. a standpipe; 22. a ring groove; 23. a heating ring; 24. a pressurizing slide plate; 25. a contact switch; 26. a rectangular tube; 27. an electromagnetic plate valve; 28. a discharge port; 29. a screen; 30. a hollow groove; 31. an air outlet; 32. a spiral feed plate; 33. a toggle plate; 34. round bench; 35. a spring; 36. an inclined groove; 37. a stirring rod; 40. EVA material extruder; 41. a PA material extruder; 42. a gluing device; 43. a first material; 44. a second material; 45. preheating the block; 46. a guide roller; 47. and (3) a gluing roller.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art.
The double-screw extrusion tablet press for EVA materials as shown in fig. 1 to 14 comprises an EVA material extruder 40, a PA material extruder 41 and a gluing device 42, wherein the EVA material extruder 40 is located at one end of the gluing device 42, the PA material extruder 41 is located at one side of the gluing device 42, a cooling tank is arranged at the output end of the EVA material extruder 40, the cooling tank is also arranged at the output end of the gluing device 42, the gluing device 42 is used for gluing substances extruded by the EVA material extruder 40 and the PA material extruder 41, the EVA material extruder 40 is used for extruding a sheet-shaped first material 43, the PA material extruder 41 is used for extruding a strip-shaped second material 44, and the gluing device 42 is used for gluing the first material 43 extruded by the EVA material extruder 40 and the second material 44 extruded by the PA material extruder 41.
The EVA material extruder 40 includes base 1 and installs the extrusion case 2 in base 1 top, extrusion cavity 19 has been seted up to the inside of extrusion case 2, two extrusion screw rods 20 that are used for the extrusion raw materials are installed to the extrusion cavity 19 internal rotation, the direction of rotation of extrusion screw rods 20 can be adjusted, the inside of extrusion case 2 inlays and is equipped with the heating ring 23 that is used for heating the raw materials, the one end intercommunication of extrusion case 2 has extrusion die 10, extrusion die 10 is used for carrying out the preforming work to the EVA material of molten state, extrusion die 10's one end top is kept away from to extrusion case 2 feeder hopper 5 that is provided with "funnel", feeder hopper 5 and extrusion cavity 19 intercommunication, extrusion cavity 19 is kept away from the one end top intercommunication of feeder hopper 5 has gas vent 7.
The bottom of extrusion case 2 and extrusion die 10 is all fixedly connected with a plurality of landing legs, and landing leg fixed connection is on the top wallboard of base 1, and extrusion case 2 and extrusion die 10 pass through the landing leg and install the top at base 1. The extrusion die 10 is a roll tablet press for extruding plastic material into a sheet form, and the extrusion die 10 is of the prior art and is not disclosed herein too much. The extrusion screw 20 pushes the material toward the extrusion die 10 when the extrusion screw 20 rotates in the forward direction, and the extrusion screw 20 pushes the material away from the extrusion die 10 when the extrusion screw 20 rotates in the reverse direction.
In specific implementation, the raw materials formed by the EVA materials are put into the feeding hopper 5, the materials in the feeding hopper 5 are then fed into the extrusion chamber 19, at this time, the two extrusion screws 20 are controlled to rotate, the rotation directions of the two extrusion screws 20 are reverse rotation, at this time, the extrusion screws 20 push the materials away from the extrusion die 10, so that the materials are collected below the feeding hopper 5, the heating ring 23 can be utilized to heat the extrusion chamber 19 by collecting the materials below the feeding hopper 5, the subsequent raw materials can be conveniently melted, the situation that the raw materials cannot be plasticized due to insufficient temperature of the extrusion box 2 can be avoided, the situation that the exhaust port 7 is in a material burst state due to no plasticization of the raw materials in the extrusion box 2 is avoided, the raw materials are preheated more fully through the preheating of the raw materials and the preheating ring 23, the subsequent melting of the raw materials is facilitated, the raw materials can be sufficiently melted, and the situation can be effectively restrained after the raw materials are melted.
Through the setting of heating ring 23, can effectually realize the heating to extrusion cavity 19, ensure that the raw materials can be melted, and then can realize mixing and extrusion work to the raw materials through extrusion screw 20. After the temperature in the raw material extrusion chamber 19 reaches the temperature required by the extrusion of the raw material, the extrusion screw 20 is controlled to rotate forward, so that the extrusion screw 20 can effectively mix and extrude the raw material, and then the raw material is extruded into the extrusion die 10 for tabletting.
When the temperature in the extrusion chamber 19 reaches the temperature required for extrusion of the raw material, melting of the raw material can be ensured, and at this time, the raw material entering the extrusion chamber 19 does not need to be preheated, and in this case, melting can be sufficiently performed even if the raw material is not preheated.
As a further embodiment of the invention: the cross-section of extrusion cavity 19 is "telescope" form, two extrusion screw rods 20 rotate respectively and connect in the both sides of extrusion cavity 19, the tip wallboard of extrusion case 2 is run through to the one end of extrusion screw rod 20, and extrusion screw rod 20 and the tip wallboard of extrusion case 2 rotate the socket joint, the one end transmission that extrusion screw rod 20 runs through extrusion case 2 is connected with drive mechanism 3, drive mechanism 3 is used for adjusting extrusion screw rod 20's direction of rotation, drive mechanism 3 and the one end fixed connection of extrusion case 2, the output shaft and the extrusion screw rod 20 fixed connection of drive mechanism 3, the one end fixedly connected with end plate 18 that extrusion cavity 19 is close to drive mechanism 3, inclined groove 36 has been seted up to the one end that drive mechanism 3 was kept away from to end plate 18. The rotation direction of the transmission mechanism 3 is controllable, the forward rotation or the reverse rotation of the extrusion screw 20 is realized through the transmission mechanism 3, the input end of the transmission mechanism 3 is provided with a servo motor, the servo motor is used for providing power for the transmission mechanism 3, the transmission mechanism 3 is provided with two output ends, and the two output ends of the transmission mechanism 3 are respectively fixedly connected with the two extrusion screw 20 so as to drive the extrusion screw 20 to rotate, and the technology is the prior art and is not disclosed excessively.
In specific implementation, after the raw materials enter the extrusion cavity 19, the extrusion screw 20 is controlled to reversely rotate through the transmission mechanism 3, in the process, the extrusion screw 20 can collect the raw materials at one end of the extrusion cavity 19 close to the end plate 18, the raw materials can be enabled to move upwards under the blocking effect of the inclined groove 36 after being abutted against the side wall of the inclined groove 36 through the inclined groove 36 formed in the side edge of the end plate 18, the stirring of the raw materials in the extrusion cavity 19 is realized by utilizing the stirring, and the uniform preheating of the raw materials can also be realized in the stirring process.
After the temperature in the extrusion chamber 19 reaches the temperature required by extrusion of the raw materials, the extrusion screw 20 is controlled to rotate forward through the transmission mechanism 3, the raw materials are pushed to a direction close to the extrusion die 10 when the extrusion screw 20 rotates forward, and in the process, the heating ring 23 can also enable the raw materials to be sufficiently melted, so that the problem of material overflow of the exhaust port 7 caused by insufficient raw material melting is avoided.
As a further embodiment of the invention: the top one end fixedly connected with portal frame 14 of extrusion case 2, the top center department of portal frame 14 rotates and cup joints axis of rotation 16, the top transmission of axis of rotation 16 is connected with driving motor 15 and the top wallboard of axis of rotation 16 and driving motor 15's output shaft fixed connection, the equal fixedly connected with puddler 37 in middle section department both sides of axis of rotation 16, the one end fixedly connected with swash plate that axis of rotation 16 was kept away from to puddler 37, the inner wall butt on swash plate and feeder hopper 5 inclined plane, the bottom of axis of rotation 16 is provided with quantitative feeding subassembly. The portal frame 14 is U-shaped, and the both ends of portal frame 14 are fixed connection respectively in extrusion case 2 top one end both sides, and portal frame 14 back-off is at extrusion case 2's top, and feeder hopper 5 is located between the two vertical ends of portal frame 14.
In the concrete implementation, after putting into the feeder hopper 5 with the raw materials, start driving motor 15, driving motor 15 drives puddler 37 and swash plate through axis of rotation 16 and rotates, and puddler 37 can stir the mixture to the raw materials at pivoted in-process, when the feeder hopper 5 in-process had multiple raw materials, can guarantee the mixture of raw materials for the raw materials is even to enter into extrusion cavity 19, prevents that multiple raw materials from appearing layering in feeder hopper 5.
Meanwhile, in the process, through the arrangement of the quantitative feeding component, the descending speed of raw materials can be effectively controlled, so that the speed of raw materials entering the extrusion chamber 19 tends to be gentle, the situation that the exhaust port 7 is in a material-overflowing state due to too fast discharging is avoided, the raw materials can be effectively preheated when the extrusion screw 20 reversely rotates after entering the extrusion chamber 19, the situation that the extrusion screw 20 is not smooth in operation due to excessive accumulation of the raw materials in the extrusion chamber 19 is avoided, besides the descending speed of the raw materials, the quantitative feeding component can stir the materials collected at one end of the extrusion chamber 19 close to the transmission mechanism 3 for the second time when the extrusion screw 20 reversely rotates, the accumulated raw materials can be fully and uniformly preheated, the situation that the raw materials are not thoroughly melted at the back due to insufficient preheating is ensured, and the situation that the exhaust port 7 is in a material-overflowing state due to incomplete melting of the raw materials is avoided.
As a further embodiment of the invention: the quantitative feeding assembly comprises a spiral feeding plate 32, the spiral feeding plate 32 is fixedly sleeved on the bottom side wall of the rotating shaft 16, the spiral feeding plate 32 is located at the communication position of the feeding hopper 5 and the extrusion chamber 19, two circular tables 34 with isosceles trapezoid cross sections are arranged on the bottom wall plate of the rotating shaft 16, the two circular tables 34 are in mirror image arrangement with respect to the contact surfaces of the two circular tables 34, a plurality of stirring plates 33 are fixedly connected to the inclined surfaces of the side edges of the circular tables 34 at equal intervals, and the upper bottom surface of the circular table 34 located above is fixedly connected to the bottom wall plate of the rotating shaft 16. The larger bottom surfaces of the two circular truncated cones 34 are positioned on one side of the two circular truncated cones 34, which are close to each other, and the smaller bottom surfaces of the circular truncated cones 34 positioned above are fixedly connected with the rotating shaft 16.
In specific implementation, through the setting of spiral feed plate 32, drive axis of rotation 16 at driving motor 15 and carry out pivoted in-process, axis of rotation 16 drives puddler 37 on the one hand and rotates, mix the stirring to the raw materials, on the other hand axis of rotation 16 also can drive spiral feed plate 32 and rotate for the raw materials is through the gentle entering into extrusion cavity 19 of spiral feed plate 32, and the setting of spiral feed plate 32 can avoid being blocked between feeder hopper 5 and the extrusion cavity 19, also can control the speed that the raw materials entered into in the extrusion cavity 19 simultaneously, can adjust the speed that spiral feed plate 32 carried the material through the rotational speed of control axis of rotation 16.
In the process of the reverse rotation of the extrusion screw 20, the materials are concentrated at one end of the extrusion chamber 19, which is close to the feed hopper 5, the rotary shaft 16 drives the round table 34 and the stirring plate 33 to rotate, raw materials collected at one side of the extrusion chamber 19, which is close to the end plate 18, are increased along with the time, raw materials at the top of one side of the extrusion chamber 19, which is close to the end plate 18, are contacted with the stirring plate 33, at the moment, the raw materials at the top can be stirred towards a direction away from the end plate 18, stirring of the raw materials in the horizontal direction is realized, the situation that the raw materials are extruded after being contacted with the end plate 18 is effectively restrained, and meanwhile, the stirring plate 33 stirs the raw materials collected at one side of the extrusion chamber 19, which is close to the end plate 18, so as to further promote the preheating of the raw materials.
As a further embodiment of the invention: the one end that feeder hopper 5 was kept away from at extrusion case 2 top is provided with gas vent 7, and gas vent 7 and extrusion cavity 19 keep away from the one end intercommunication of feeder hopper 5, have seted up discharge gate 28 on the one end wallboard that extrusion cavity 19 kept away from feeder hopper 5, and discharge gate 28 and extrusion cavity 19 intercommunication and both intercommunication department are located extrusion cavity 19's tip center department, and the one end that discharge gate 28 is close to extrusion cavity 19 inlays and is equipped with screen cloth 29, and the one end intercommunication that feed hopper 5 was kept away from to discharge gate 28 has rectangular box 8, rectangular box 8 and extrusion die 10 intercommunication. The arrangement of the screen 29 is well known to those skilled in the art and will not be disclosed in any great detail herein.
In practice, after the extrusion screw 20 pushes the raw material to the position of the discharge port 28, the melted raw material contacts with the screen 29, and then enters the discharge port 28 through the filtration of the screen 29, after passing through the discharge port 28, the extruded raw material enters the rectangular box 8, after entering the rectangular box 8, the raw material is pressurized by the rectangular box 8, and then enters the extrusion die 10 for tabletting.
As a further embodiment of the invention: the inside sliding connection of rectangle box 8 has pressurization slide 24, the equal fixedly connected with spacing slide bar 11 in one side both ends that the discharge gate 28 was kept away from to pressurization slide 24, spacing slide bar 11 runs through the rectangle box 8 and is kept away from the lateral wall board of feeder hopper 5, cup joint spring 35 on the spacing slide bar 11, the both ends of spring 35 are fixed respectively and are got up and keep away from on the lateral wall of one side inner wall of feeder hopper 5 and pressurization slide 24 at rectangle box 8, the intercommunication has rectangular pipe 26 on the one end bottom wallboard that rectangle box 8 is close to the discharge gate 28, rectangular pipe 26 is kept away from the one end of rectangle box 8 and is linked together with the input of extrusion die 10. The limit slide bar 11 can hold the slide of the pressing slide plate 24 in the horizontal direction.
In particular implementation, after the raw material subjected to heating extrusion enters the rectangular box 8, the pressurizing slide plate 24 is extruded, so that the pressurizing slide plate 24 moves towards a direction far away from the extrusion box 2, at this time, the spring 35 is extruded, and the reaction force applied to the pressurizing slide plate 24 by the spring 35 can be used for effectively secondarily extruding the raw material entering the rectangular box 8, so that on one hand, the raw material can be prevented from generating bubbles inside the raw material after the raw material leaves the extrusion box 2 and is subjected to melting extrusion due to contact with external air, and on the other hand, the pressure in the rectangular box 8 can be ensured by the spring 35, and after the pressure is ensured, the raw material can not exist after the raw material comes out of the extrusion die 10.
As a further embodiment of the invention: the rectangular pipe 26 is provided with solenoid valve 27 with the intercommunication department of the inside cavity of rectangular box 8, and solenoid valve 27 electric connection has contact switch 25, and contact switch 25 fixed connection is in the one end of butt pole 9, and contact switch 25 and the central department wallboard activity butt of pressurization slide 24, the outside of butt pole 9 is provided with the screw thread, and butt pole 9 threaded connection is on the one side wallboard that rectangular box 8 kept away from feeder hopper 5, has seted up a plurality of gas pockets that are used for maintaining atmospheric pressure balance on the one end wallboard that rectangular box 8 kept away from feeder hopper 5. The abutment rod 9 is threadably adjustable in position for insertion into the rectangular box 8.
In specific implementation, when the relative position between the contact switch 25 and the extrusion box 2 is adjusted through the abutting rod 9, the distance between the contact switch 25 and the pressurizing slide plate 24 is adjusted, the compression degree of the spring 35 is changed, the pressure born by the raw materials in the rectangular box 8 can be effectively adjusted, the pressure of the material outlet 28 is adjusted, and the condition that the material is overflowed due to overlarge pressure at the material outlet 28 of the air outlet 7 is avoided.
When the extrusion screw 20 is controlled to reversely rotate, the spring 35 applies pressure to the compression slide plate 24, so that raw materials positioned on one side of the compression slide plate 24 close to the extrusion box 2 are extruded into the extrusion chamber 19, and in the process that the raw materials enter the extrusion chamber 19, the raw materials pass through the screen 29, so that the screen 29 is reversely flushed, and the condition that the exhaust port 7 is overflowed due to the sealing of the screen 29 is avoided.
As a further embodiment of the invention: the center department one side of base 1 is provided with fan 12, fan 12's output intercommunication has built-in pipe, built-in pipe is seted up in the inside of base 1, built-in pipe keeps away from fan 12 output's one end intercommunication has three-way valve 17, three-way valve 17 is provided with two output and two output intercommunication respectively have the outlet duct and be used for the standpipe 21 that feeder hopper 5 preheated, the one end intercommunication that three-way valve 17 was kept away from to the outlet duct has bellows 4, bellows 4 fixed connection is on base 1's top wallboard, a plurality of round holes that are used for giving vent to anger have been seted up to bellows 4 one side that is close to extrusion die 10, the round hole is used for cooling down the EVA material after extrusion die 10 carries out the preforming work.
In specific implementation, when the three-way valve 17 controls the fan 12 to be communicated with the bellows 4, the sheet-shaped finished product coming out of the extrusion die 10 can be cooled and radiated effectively, and when the three-way valve 17 controls the fan 12 to be communicated with the annular groove 22, the heating ring 23 can be cooled effectively, so that the condition that raw materials are burnt due to excessive melting caused by overhigh temperature of the heating ring 23 is avoided.
In the process of cooling the heating ring 23, through the setting of communicating pipe 13 for high temperature gas in the annular 22 flows into in the hollow tank 30, and then makes the temperature of feeder hopper 5 rise, after the temperature of feeder hopper 5 rises, can preheat the raw materials in the feeder hopper 5, avoid leading to the condition that the raw materials can't fully melt to appear because of the too big range of heating ring 23 temperature reduction, and then avoid the condition emergence that the raw materials can't fully melt and lead to gas vent 7 to appear the material that emits in the heating ring 23 cooling process.
As a further embodiment of the invention: the annular groove 22 is formed in the center of the inside of the extrusion box 2, the thermometer 6 is embedded in the center of the top of the annular groove 22, one end of the standpipe 21, which is far away from the three-way valve 17, is communicated with the annular groove 22, the two communicating positions are located at the bottom of one end of the annular groove 22, which is far away from the feed hopper 5, the top of one end of the annular groove 22, which is close to the feed hopper 5, is communicated with the communicating pipe 13, the hollow groove 30 is formed in the inside of the feed hopper 5, one end of the communicating pipe 13, which is far away from the annular groove 22, is communicated with the hollow groove 30, the air outlet 31 is formed in the top of one end, which is far away from the annular groove 22, of the hollow groove 30, and the air outlet 31 is communicated with the hollow groove 30, and the dust screen is arranged at one end, which is far away from the hollow groove 30, of the air outlet 31.
In specific implementation, thermometer 6 can effectually detect the temperature of heating ring 23 at the in-process of the device extrusion raw materials, when cooling down to heating ring 23, can effectually preheat the raw materials in feeder hopper 5 to the in-process of preheating, puddler 37 and swash plate in feeder hopper 5 are favorable to the raw materials in feeder hopper 5 to carry out abundant and even preheating to the stirring work of raw materials.
The application method of the double-screw extrusion tablet press for EVA materials comprises the following steps:
step one: the raw materials prepared by adding EVA materials into the feed hopper 5 are preheated in the extrusion chamber 19 by opening the heating ring 23, and after the heating ring 23 is opened, the extrusion screw 20 is controlled to reversely rotate, and the extrusion screw 20 concentrates the raw materials at one end of the extrusion box 2 far away from the extrusion die 10;
step two: after the preheating operation in the extrusion chamber 19 is completed, the extrusion screw 20 is controlled to rotate in the forward direction, and the extrusion screw 20 conveys the material in the direction approaching the extrusion die 10, and in the process, the raw materials are melted and mixed;
step three: as the extrusion screw 20 rotates, the raw material is fed into the extrusion die 10, and then extruded into a sheet-like finished product through the extrusion die 10.
The working principle of the invention is as follows:
when the invention is used, EVA material is extruded into sheet-shaped first material 43 through EVA material extruder 40, strip-shaped second material 44 is extruded through PA material extruder 41, then the first material and the second material are glued through gluing device 42, the first material and the second material are effectively glued, and then the first material and the second material are cooled through a cooling tank to obtain a finished product.
As shown in fig. 13-14, the gluing device 42 is provided with two gluing rollers 47 and a guiding roller 46, the guiding roller 46 is used for guiding the second material 44 extruded by the PA material extruder 41, when the second material 44 extruded by the PA material extruder 41 is adhered to the first material 43 extruded by the EVA material extruder 40, the two gluing rollers 47 glue the second material 44 extruded by the PA material extruder 41 with the first material 43 extruded by the EVA material extruder 40, a preheating block 45 is provided on one side of the top of the gluing device 42 away from the gluing roller 47, and the preheating block 45 is used for preheating the second material 44 extruded by the PA material extruder 41 and the first material 43 extruded by the EVA material extruder 40, and the gluing device 42 is of the prior art and is not disclosed herein too much.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined by the appended claims.
Claims (4)
1. The double-screw extrusion tablet press for the EVA material comprises an EVA material extruder (40), a PA material extruder (41) and a gluing device (42), and is characterized in that the EVA material extruder (40) is positioned at one end of the gluing device (42), the PA material extruder (41) is positioned at one side of the gluing device (42), a cooling pond is arranged at the output end of the EVA material extruder (40), a cooling pond is also arranged at the output end of the gluing device (42), and the gluing device (42) is used for gluing substances extruded by the EVA material extruder (40) and the PA material extruder (41);
the EVA material extruder (40) comprises a base (1) and an extrusion box (2) arranged above the base (1), an extrusion chamber (19) is formed in the extrusion box (2), two extrusion screws (20) used for extruding raw materials are rotationally arranged in the extrusion chamber (19), the rotation direction of the extrusion screws (20) can be adjusted, a heating ring (23) used for heating the raw materials is embedded in the extrusion box (2), one end of the extrusion box (2) is communicated with an extrusion die (10), the extrusion die (10) is used for tabletting molten EVA materials, a hopper (5) in a funnel shape is arranged at the top of one end of the extrusion box (2) away from the extrusion die (10), the hopper (5) is communicated with the extrusion chamber (19), and an exhaust port (7) is communicated with the top of one end of the extrusion chamber (19) away from the hopper (5);
the section of the extrusion chamber (19) is telescope-shaped, two extrusion screws (20) are respectively connected to two sides of the extrusion chamber (19) in a rotating mode, one end of each extrusion screw (20) penetrates through an end wall plate of the extrusion box (2), the extrusion screws (20) are in rotating sleeving connection with the end wall plate of the extrusion box (2), one end of each extrusion screw (20) penetrates through the extrusion box (2) and is in transmission connection with a transmission mechanism (3), the transmission mechanism (3) is used for adjusting the rotation direction of each extrusion screw (20), the transmission mechanism (3) is fixedly connected with one end of the extrusion box (2), an output shaft of each transmission mechanism (3) is fixedly connected with the extrusion screw (20), one end, close to each transmission mechanism (3), of each extrusion chamber (19) is fixedly connected with an end plate (18), and one end, far away from each transmission mechanism (3), of each end plate (18) is provided with an inclined groove (36);
the top end of the extrusion box (2) is fixedly connected with a portal frame (14), a rotating shaft (16) is rotatably sleeved at the center of the top of the portal frame (14), a driving motor (15) is connected to the top of the rotating shaft (16) in a transmission manner, a top end wall plate of the rotating shaft (16) is fixedly connected with an output shaft of the driving motor (15), stirring rods (37) are fixedly connected to two sides of the middle section of the rotating shaft (16), one end of each stirring rod (37) away from the rotating shaft (16) is fixedly connected with a sloping plate, the sloping plate is abutted against the inner wall of the inclined surface of the feed hopper (5), and a quantitative feeding component is arranged at the bottom of the rotating shaft (16);
the quantitative feeding assembly comprises a spiral feeding plate (32), the spiral feeding plate (32) is fixedly sleeved on the side wall of the bottom end of the rotating shaft (16), the spiral feeding plate (32) is located at the communication position of the feeding hopper (5) and the extrusion chamber (19), two circular tables (34) with isosceles trapezoid cross sections are arranged on the bottom end wall plate of the rotating shaft (16), the contact surfaces of the two circular tables (34) are in mirror image arrangement, a plurality of stirring plates (33) are fixedly connected to the inclined surfaces of the side edges of the circular tables (34) at equal intervals, and the upper bottom surface of the circular table (34) located above is fixedly connected to the bottom wall plate of the rotating shaft (16);
the one end that feeder hopper (5) was kept away from at extrusion case (2) top is provided with gas vent (7), gas vent (7) and extrusion cavity (19) are kept away from the one end intercommunication of feeder hopper (5), discharge gate (28) have been seted up on the one end wallboard that extrusion cavity (19) kept away from feeder hopper (5), discharge gate (28) and extrusion cavity (19) intercommunication and both intercommunication department are located extrusion cavity (19) tip center department, the one end that extrusion cavity (19) was close to in discharge gate (28) is inlayed and is equipped with screen cloth (29), the one end intercommunication that feeder hopper (5) was kept away from in discharge gate (28) has rectangle box (8), rectangle box (8) and extrusion die (10) intercommunication;
the inside sliding connection of rectangle box (8) has pressurization slide (24), the one side both ends that discharge gate (28) were kept away from to pressurization slide (24) are all fixedly connected with spacing slide bar (11), spacing slide bar (11) run through the side wall board that rectangle box (8) kept away from feeder hopper (5), spring (35) have been cup jointed on spacing slide bar (11), the both ends of spring (35) are fixed respectively on one side inner wall that rectangle box (8) kept away from feeder hopper (5) and the lateral wall of pressurization slide (24), the intercommunication has rectangular pipe (26) on the one end bottom wall board that rectangle box (8) is close to discharge gate (28), the one end that rectangular pipe (26) kept away from rectangle box (8) communicates with the input of extrusion die (10);
the utility model discloses a rectangular box, including rectangular box (8), including connecting rod (5) and connecting rod (9), rectangular tube (26) and rectangular box (8) inside cavity's intercommunication department is provided with solenoid valve (27), solenoid valve (27) electric connection has contact switch (25), contact switch (25) fixed connection is in the one end of butt pole (9), the center department wallboard activity butt of contact switch (25) and pressurization slide (24), the outside of butt pole (9) is provided with the screw thread, butt pole (9) threaded connection is on rectangular box (8) keep away from the one side wallboard of feeder hopper (5), a plurality of gas pockets that are used for maintaining the atmospheric pressure balance have been seted up on rectangular box (8) keep away from the one end wallboard of feeder hopper (5).
2. A twin screw extrusion tablet press for EVA material according to claim 1, wherein: the novel EVA material cooling device is characterized in that a fan (12) is arranged on one side of the center of the base (1), an output end of the fan (12) is communicated with a built-in pipe, the built-in pipe is arranged inside the base (1), one end of the built-in pipe, which is far away from the output end of the fan (12), is communicated with a three-way valve (17), two output ends of the three-way valve (17) are respectively communicated with an air outlet pipe and a vertical pipe (21) used for preheating the feed hopper (5), one end of the air outlet pipe, which is far away from the three-way valve (17), is communicated with an air box (4), the air box (4) is fixedly connected to a top wall plate of the base (1), one side, which is close to the extrusion die (10), of the air box (4), is provided with a plurality of round holes used for air outlet, and the round holes are used for cooling EVA materials after the extrusion die (10) performs tabletting.
3. A twin screw extrusion tablet press for EVA material according to claim 2, wherein: annular groove (22) have been seted up to the inside center department of extrusion case (2), the top center department of annular groove (22) inlays and is equipped with thermometer (6), thermometer (6) are inlayed and are established in extrusion case (2), the one end and annular groove (22) intercommunication that three way valve (17) were kept away from to standpipe (21), and the two intercommunication department is located the one end bottom that annular groove (22) kept away from feeder hopper (5), the one end top intercommunication that annular groove (22) is close to feeder hopper (5) has communicating pipe (13), hollow groove (30) have been seted up to the inside of feeder hopper (5), the one end and hollow groove (30) intercommunication that annular groove (22) were kept away from to communicating pipe (13), gas outlet (31) have been seted up at the one end top that annular groove (22) was kept away from to hollow groove (30), gas outlet (31) and hollow groove (30) intercommunication, the one end that hollow groove (30) was kept away from to gas outlet (31) is provided with the dust screen.
4. A method for using a twin-screw extrusion tablet press for EVA materials, which is applicable to the twin-screw extrusion tablet press for EVA materials according to any one of claims 1 to 3, and is characterized in that: the application method comprises the following steps:
step one: raw materials prepared by adding EVA materials into a feed hopper (5) are preheated in an extrusion chamber (19) by opening a heating ring (23), and after the heating ring (23) is opened, the extrusion screw (20) is controlled to reversely rotate, and the extrusion screw (20) concentrates the raw materials at one end, far away from an extrusion die (10), of an extrusion box (2);
step two: after the preheating work is finished in the extrusion chamber (19), controlling the extrusion screw (20) to rotate forwards, and conveying the materials to the direction close to the extrusion die (10) by the extrusion screw (20), wherein the materials are melted and mixed in the process;
step three: as the extrusion screw (20) rotates, the feedstock is fed into the extrusion die (10) and is subsequently extruded through the extrusion die (10) into a sheet-like product.
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| CN202310970028.7A CN116691039B (en) | 2023-08-03 | 2023-08-03 | Double-screw extrusion tablet press for EVA material and use method thereof |
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| CN116353020A (en) * | 2023-03-27 | 2023-06-30 | 江苏鑫智捷橡塑机械制造有限公司 | Double-screw extruder |
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| US4877390A (en) * | 1987-04-03 | 1989-10-31 | Werner & Pfleiderer Gmbh | Degassification device for a screw extruder which processes plastic material |
| WO2009099261A1 (en) * | 2008-02-04 | 2009-08-13 | Jong-Soo Kim | Extruder |
| CN113261691A (en) * | 2021-05-27 | 2021-08-17 | 郭双 | Bulking machine extrusion mechanism capable of reducing damage rate of screw |
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