CN212949081U - Double-screw extruder for polyacrylic resin - Google Patents
Double-screw extruder for polyacrylic resin Download PDFInfo
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- CN212949081U CN212949081U CN202021413583.8U CN202021413583U CN212949081U CN 212949081 U CN212949081 U CN 212949081U CN 202021413583 U CN202021413583 U CN 202021413583U CN 212949081 U CN212949081 U CN 212949081U
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Abstract
The utility model discloses a double screw extruder for polyacrylic resin, which comprises a base, an extrusion cylinder fixedly installed on the base, a double screw mechanism arranged in the extrusion cylinder and a power mechanism installed on the base and used for driving the double screw mechanism to work, wherein the discharge end of the extrusion cylinder is connected with an extrusion machine head die, the feed end of the extrusion cylinder is connected with a heating mechanism, the heating mechanism comprises a conveying cylinder, a spiral feed rod which is horizontally arranged in the conveying cylinder and a first motor used for driving the spiral feed rod to rotate, heating elements are respectively installed in the side walls of the conveying cylinder and the spiral feed rod, and the two ends of the conveying cylinder are correspondingly provided with a feed port and a discharge port; the outer side of the extruding cylinder is wrapped with an insulating layer; and a cooling water channel which is annularly arranged is formed on the side wall of one end of the extruding cylinder close to the extruding machine head die. The utility model has uniform heating effect, and is convenient for later extrusion; the pressure of the raw materials on the screw rod in the extruding cylinder can be reduced, the blocking condition is reduced, and the processing speed is improved.
Description
Technical Field
The utility model relates to a double screw extruder for polyacrylic resin belongs to extruder technical field.
Background
The polyacrylic resin is used as enteric coating material for tablet, pill and granule, and film forming agent and microcapsule film forming agent for enteric capsule shell, or used as coating material and skeleton material in slow release preparation. When the product is manufactured by using the material, a double-screw extruder is generally adopted for extrusion molding treatment. The production operation flow of the existing double-screw extruder is as follows: the raw materials enter the extruding cylinder through the blanking hopper, and are extruded through the double-screw mechanism in the extruding cylinder after being heated and melted. Because the screw rotates, shearing and rubbing to generate heat, a cooling device for cooling is generally arranged on one side of the discharge end of the extruding barrel. The existing double-screw extruder has the following problems in the actual use process:
1. generally, heating equipment is additionally arranged to heat and melt the raw materials in the extruding cylinder, the structure is complex, and the heating and melting effect is poor;
2. most of the prior art is to add raw materials into the extruding cylinder directly, and the extrusion blockage of the screw rod in the extruding cylinder is easily caused by adding a large amount of raw materials once, so that the processing speed is influenced, and further the production benefit of a factory is influenced.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model provides a double-screw extruder for polyacrylic resin, which has uniform heating effect and is convenient for later-stage extrusion; the pressure of the raw materials on the screw rod in the extruding cylinder can be reduced, the blocking condition is reduced, and the processing speed is improved.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a double-screw extruder and a coal feeder for polyacrylic resin comprise a base, an extrusion barrel fixedly mounted on the base, a double-screw mechanism arranged in the extrusion barrel and a power mechanism mounted on the base and used for driving the double-screw mechanism to work, wherein the discharge end of the extrusion barrel is connected with an extrusion machine head die, the feed end of the extrusion barrel is connected with a heating mechanism used for heating and conveying raw materials, the heating mechanism comprises a conveying barrel, a spiral feeding rod which is horizontally arranged in the conveying barrel in a rotatable manner and a first motor used for driving the spiral feeding rod to rotate, heating elements are mounted in the side walls of the conveying barrel and the spiral feeding rod, and a feed port and a discharge port are correspondingly formed in two ends of the conveying barrel; the discharge port of the conveying cylinder is connected with the feed end of the extruding cylinder; the outer side of the extruding cylinder is wrapped with a heat-insulating layer; the side wall of one end, close to the extruding machine head die, of the extruding barrel is provided with a cooling water channel which is arranged in an annular mode, a water outlet of the cooling water channel is connected with a water tank with a refrigerating function, a water inlet of the cooling water channel is connected with a water pump, and the water pump is connected with the water tank.
Preferably, the double-screw mechanism comprises two screws arranged in parallel, the diameter of each screw is gradually increased from the feeding end to the discharging end, and the distance between two adjacent screw blades on each screw is gradually reduced from the feeding end to the discharging end.
Preferably, the size of the helical blades on the screw is gradually increased from the feeding end to the discharging end.
Preferably, the material distribution mechanism is arranged between the discharge port of the conveying cylinder and the feed end of the extruding cylinder and comprises an outer connecting plate sleeved on the feed end of the extruding cylinder, an inner connecting plate arranged in the outer connecting plate and concentric with the outer connecting plate, a first bevel gear capable of being rotatably connected to the inner connecting plate, a second bevel gear meshed with the first bevel gear and a second motor driving the second bevel gear to rotate, a gear shaft of the second bevel gear penetrates through the side wall of the feed end of the extruding cylinder and is connected with the output end of the second motor, a plurality of obliquely arranged material distribution plates are arranged below the first bevel gear, and the inner connecting plate is fixedly connected with the outer connecting plate through a connecting rod.
Preferably, the power mechanism comprises a third motor and a speed reducer connected with the output end of the third motor, and the speed reducer is connected with the double-screw mechanism.
Compared with the prior art, the utility model adopts an independent heating mechanism for heating, the heating effect is uniform, and the extrusion at the later stage is convenient; meanwhile, the material entering the material extruding barrel is stirred and dispersed by the material distributing mechanism, so that the pressure of the raw materials on the screw rod in the material extruding barrel can be reduced, the occurrence of blockage is reduced, and the processing speed is improved; the position of the material extruding barrel close to the discharge end is provided with a cooling water channel, the water inlet and the water outlet of the cooling water channel are respectively connected with a water pump and a water tank with a refrigeration function, and continuous and uninterrupted cooling of the material extruding barrel can be realized, so that cooling of materials to be extruded in the material extruding barrel is realized, the materials are placed to be overheated, and the extrusion effect is influenced.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural diagram of the material distributing mechanism of the present invention.
Detailed Description
The technical solutions in the implementation of the present invention will be clear from the following description and accompanying drawings, and the described embodiments are only some embodiments, not all embodiments, of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 and fig. 2, an embodiment of the present invention provides a twin-screw extruder and a coal feeder for polyacrylic resin, which includes a base 1, an extruding barrel 2 fixedly mounted on the base 1, a twin-screw mechanism 3 arranged in the extruding barrel 2, and a power mechanism mounted on the base 1 for driving the twin-screw mechanism 3 to work, wherein a discharging end of the extruding barrel 2 is connected with an extruding handpiece mold 6, a feeding end of the extruding barrel 2 is connected with a heating mechanism 7 for heating and conveying raw materials, the heating mechanism 7 includes a conveying barrel 73, a horizontally arranged screw feeding rod 74 rotatably mounted in the conveying barrel 73, and a first motor 71 for driving the screw feeding rod 74 to rotate, heating elements are mounted in side walls of the conveying barrel 73 and the screw feeding rod 74, and heating of the conveying barrel 73 and the screw feeding rod 74 can be realized by electrifying the heating elements, therefore, materials in the conveying cylinder 73 can be heated, the materials can be heated more uniformly and sufficiently due to the fact that the spiral feeding rod 74 conveys the materials while stirring, the conveying cylinder 73 is provided with the exhaust hole 75, and when exhaust is needed, a valve on the exhaust hole 75 can be opened to exhaust gas of the conveying cylinder 73; a feed inlet and a discharge outlet are correspondingly formed in two ends of the conveying cylinder 73, and a feed hopper 72 is installed at the feed inlet of the conveying cylinder 73; the discharge port of the conveying cylinder 73 is connected with the feed end of the extruding cylinder 2; the outer side of the extruding cylinder 2 is wrapped with a heat-insulating layer (not shown); the side wall of one end, close to the extruding machine head die 6, of the extruding cylinder 2 is provided with a cooling water channel 21 which is annularly arranged, a water outlet of the cooling water channel 21 is connected with a water tank 5 with a refrigeration function, a water inlet of the cooling water channel 21 is connected with a water pump 4, and the water pump 4 is connected with the water tank 5. Wherein, the position that the crowded feed cylinder is close to the discharge end is equipped with the cooling water course, and cooling water course advances, the delivery port is connected with the water pump respectively, has the water tank of refrigeration function, can realize the incessant cooling to crowded feed cylinder to the realization is to the cooling of waiting to extrude the material in the crowded feed cylinder, and it is overheated to place the material, and the condition that the effect was extruded in the influence takes place. As for the water tank 5, as long as it has a refrigerating function, it can cool the water inside, and the specific structure thereof is not required, so detailed description thereof is omitted. Certainly, the water outlet of the cooling water channel can also be not connected with the water tank, the water tank is directly connected with flowing tap water, and the water pump 4 directly sucks the tap water in the water tank into the cooling water channel 21 to cool the extruding cylinder.
Preferably, the twin-screw mechanism 3 comprises two screws 31 arranged in parallel, the diameter of each screw 31 gradually increases from the feeding end to the discharging end, and the distance between two adjacent helical blades 32 on each screw 31 gradually decreases from the feeding end to the discharging end. The diameter of the screw rod from the feeding end to the discharging end is gradually increased, and the screw pitch is gradually decreased, so that the discharging is more fine.
Preferably, the size of the helical blade 32 on the screw 31 increases from the feeding end to the discharging end. The size of the helical blade 32 is gradually increased, so that the discharging is more fine and smooth.
As a further improvement of the present invention, the separation mechanism 8 between the discharge port of the conveying cylinder 73 and the feed end of the extruding cylinder 2 may further include an outer connecting plate 81 mounted on the feed end of the extruding cylinder 2, an inner connecting plate 82 concentrically disposed with the outer connecting plate 81 in the outer connecting plate 81, a first bevel gear 87 rotatably connected to the inner connecting plate 82, a second bevel gear 85 engaged with the first bevel gear 87, and a second motor 84 driving the second bevel gear 85 to rotate, wherein the gear shaft of the second bevel gear 85 passes through the side wall of the feed end of the extruding cylinder and is connected to the output end of the second motor 84, a plurality of material separating plates 86 obliquely disposed are disposed below the first bevel gear 87, and the inner connecting plate 82 is fixedly connected to the outer connecting plate 81 through a connecting rod 83. The first bevel gear 87 is mounted on the inner connecting plate 82 through a bearing, and an umbrella-shaped material distributing plate 821 is arranged on the inner connecting plate 82 and can prevent materials from falling into the bearing and influencing the rotation of the first bevel gear 87. When the second motor 84 is started, the second bevel gear 85 rotates along with the second motor, the first bevel gear 87 rotates under the driving of the second bevel gear 85, the material distributing plate 86 can distribute and stir materials falling through the gap between the inner connecting plate 82 and the outer connecting plate 81 along with the first bevel gear 87, feeding is more stable, impact force of the materials on the double-screw mechanism 3 is reduced, blockage is avoided, machining speed is further improved, and production benefits of factories are improved.
Preferably, the power mechanism comprises a third motor and a speed reducer connected with the output end of the third motor, and the speed reducer is connected with the double-screw mechanism, so that the structure is simple, and the cost is low.
During working, the heating element can be started to start heating, raw materials are put into the conveying cylinder 73 through the feed hopper 72, and the materials are conveyed to the discharge hole of the conveying cylinder 73 to be conveyed while being heated under the action of the heating element and the spiral feeding rod 74; the heated material enters the extruding cylinder 2 through a material distributing mechanism 8 arranged at the feeding end of the extruding cylinder 2, specifically falls down from a gap between the inner connecting plate 82 and the outer connecting plate 81, falls onto the double-screw mechanism 3 under the action of the umbrella-shaped material distributing plate 821 and the material distributing plate 86, and is extruded and conveyed towards the extruding machine head die 6 left and right downwards by the double-screw mechanism 3.
In conclusion, the utility model adopts an independent heating mechanism for heating, the heating effect is uniform, and the extrusion in the later period is convenient; meanwhile, the material entering the material extruding barrel is stirred and dispersed by the material distributing mechanism, so that the pressure of the raw materials on the screw rod in the material extruding barrel can be reduced, the blocking condition is reduced, and the processing speed is improved.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the embodiments may be appropriately combined to form other embodiments understood by those skilled in the art.
Claims (5)
1. A double-screw extruder for polyacrylic resin comprises a base, an extrusion cylinder fixedly mounted on the base, a double-screw mechanism arranged in the extrusion cylinder and a power mechanism mounted on the base and used for driving the double-screw mechanism to work, wherein a discharge end of the extrusion cylinder is connected with an extrusion machine head die; the discharge port of the conveying cylinder is connected with the feed end of the extruding cylinder; the outer side of the extruding cylinder is wrapped with a heat-insulating layer; the side wall of one end, close to the extruding machine head die, of the extruding barrel is provided with a cooling water channel which is arranged in an annular mode, a water outlet of the cooling water channel is connected with a water tank with a refrigerating function, a water inlet of the cooling water channel is connected with a water pump, and the water pump is connected with the water tank.
2. The twin-screw extruder for polyacrylic resin as claimed in claim 1, wherein the twin-screw mechanism comprises two screws arranged in parallel, each screw having a diameter gradually increasing from a feed end to a discharge end, and a distance between two adjacent screw blades on each screw gradually decreasing from the feed end to the discharge end.
3. The twin screw extruder for polyacrylic resin as claimed in claim 2, wherein the size of the helical blade on the screw is gradually increased from the feed end to the discharge end.
4. The twin-screw extruder for polyacrylic resin according to claim 1, further comprising a material distribution mechanism installed between the discharge port of the conveying cylinder and the feed end of the extruding cylinder, wherein the material distribution mechanism comprises an outer connecting plate sleeved on the feed end of the extruding cylinder, an inner connecting plate arranged in the outer connecting plate concentrically with the outer connecting plate, a first bevel gear rotatably connected to the inner connecting plate, a second bevel gear meshed with the first bevel gear, and a second motor driving the second bevel gear to rotate, a gear shaft of the second bevel gear penetrates through a side wall of the feed end of the extruding cylinder to be connected with an output end of the second motor, a plurality of obliquely arranged material distribution plates are arranged below the first bevel gear, and the inner connecting plate is fixedly connected with the outer connecting plate through connecting rods.
5. The twin-screw extruder for polyacrylic resin as claimed in claim 1, wherein the power mechanism comprises a third motor and a speed reducer connected with an output end of the third motor, and the speed reducer is connected with the twin-screw mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021413583.8U CN212949081U (en) | 2020-07-16 | 2020-07-16 | Double-screw extruder for polyacrylic resin |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021413583.8U CN212949081U (en) | 2020-07-16 | 2020-07-16 | Double-screw extruder for polyacrylic resin |
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| CN212949081U true CN212949081U (en) | 2021-04-13 |
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| CN202021413583.8U Active CN212949081U (en) | 2020-07-16 | 2020-07-16 | Double-screw extruder for polyacrylic resin |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114176155A (en) * | 2021-11-30 | 2022-03-15 | 山东真诺智能设备有限公司 | Tubular cooling sleeve |
| CN115972541A (en) * | 2023-03-17 | 2023-04-18 | 河北华密新材科技股份有限公司 | Modified engineering plastic extrusion device and method |
| CN117103625A (en) * | 2023-10-24 | 2023-11-24 | 江苏齐杰机械有限公司 | Double-screw extruder capable of continuously and uninterruptedly conveying materials and application method thereof |
-
2020
- 2020-07-16 CN CN202021413583.8U patent/CN212949081U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114176155A (en) * | 2021-11-30 | 2022-03-15 | 山东真诺智能设备有限公司 | Tubular cooling sleeve |
| CN115972541A (en) * | 2023-03-17 | 2023-04-18 | 河北华密新材科技股份有限公司 | Modified engineering plastic extrusion device and method |
| CN117103625A (en) * | 2023-10-24 | 2023-11-24 | 江苏齐杰机械有限公司 | Double-screw extruder capable of continuously and uninterruptedly conveying materials and application method thereof |
| CN117103625B (en) * | 2023-10-24 | 2024-01-26 | 江苏齐杰机械有限公司 | Double-screw extruder capable of continuously and uninterruptedly conveying materials and application method thereof |
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