CN212312702U - Screw plastic extruder - Google Patents
Screw plastic extruder Download PDFInfo
- Publication number
- CN212312702U CN212312702U CN202020764046.1U CN202020764046U CN212312702U CN 212312702 U CN212312702 U CN 212312702U CN 202020764046 U CN202020764046 U CN 202020764046U CN 212312702 U CN212312702 U CN 212312702U
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- heat dissipation
- machine barrel
- screw
- plastic extruder
- machine
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- 229920003023 plastic Polymers 0.000 title claims abstract description 39
- 239000004033 plastic Substances 0.000 title claims abstract description 39
- 238000010438 heat treatment Methods 0.000 claims abstract description 34
- 230000017525 heat dissipation Effects 0.000 claims abstract description 32
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 238000007664 blowing Methods 0.000 claims abstract description 4
- 238000001035 drying Methods 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 238000002844 melting Methods 0.000 abstract description 19
- 230000008018 melting Effects 0.000 abstract description 19
- 230000000694 effects Effects 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 description 17
- 238000012545 processing Methods 0.000 description 9
- 238000001125 extrusion Methods 0.000 description 8
- 238000005056 compaction Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses a screw rod plastics extruder, include: the machine barrel is placed in front and at the back and is horizontally arranged on the machine frame; a heat dissipation cover with a plurality of heat dissipation grooves covers the machine barrel, the front end of the machine barrel extends out of a front opening on the front end surface of the heat dissipation cover and then is connected with the machine head, and a feeding hopper communicated with the inner cavity of the machine barrel is arranged on the side wall of the top of the rear end of the machine barrel; the screw is arranged in the machine barrel in an inserting way through the bearing, and the rear end of the screw extends out of the rear opening on the rear end surface of the machine barrel and is connected with the driving device; the barrel is provided with a plurality of heating rings by back-to-front uniform spacing sleeves, a temperature sensor used for measuring the temperature of the position section where the heating ring is located is arranged at each heating ring, a heat dissipation port is formed in a heat dissipation cover below each heating ring, and a heat dissipation fan used for blowing, dissipating heat and cooling the heating rings is arranged at each heat dissipation port. The screw plastic extruder with the structure can accurately control the melting and plasticizing temperatures, and improve the plasticizing effect and the yield.
Description
Technical Field
The utility model relates to a plastics processing field especially relates to a screw rod plastics extruder.
Background
The screw plastic extruder is common extrusion equipment in a plastic product processing production line, and the purpose of processing plastic products in different forms (such as pipes, rods, belts, stay wires, blown films, cables and the like) is met by replacing machine heads in different forms on the screw plastic extruder. With the rapid development of the plastic industry, the demand of screw plastic extruders is increasing rapidly, and the requirements of users on the product quality are also increasing. The common screw plastic extruder in the market at present can not accurately control the melting and plasticizing temperatures, the problems of poor plasticizing and the like can be caused by too low temperature, and the problems of unsmooth feeding, bridging of feeding, low yield and the like can be caused by too high temperature which can cause premature melting of materials.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that needs to solve is: the screw plastic extruder can accurately control the melting and plasticizing temperatures so as to improve the plasticizing effect and the yield.
In order to solve the above problem, the utility model adopts the following technical scheme: the screw plastic extruder comprises: the machine barrel is placed in front and at the back and is horizontally arranged on the machine frame; a heat dissipation cover with a plurality of heat dissipation grooves covers the machine barrel, the front end of the machine barrel extends out of a front opening on the front end surface of the heat dissipation cover and then is connected with the machine head, a feeding hopper communicated with the inner cavity of the machine barrel is arranged on the side wall of the top of the rear end of the machine barrel, and the feeding hopper is inserted into a vertical through hole in the top surface of the heat dissipation cover; the screw rod is arranged in the machine barrel in an inserting mode through the bearing, and the thread on the screw rod is divided into three sections from back to front: the rear end of the screw rod extends out of a rear opening on the rear end face of the machine barrel and then is connected with a driving device, and the screw rod rotates around the axis of the screw rod under the driving of the driving device, so that the material in the inner cavity of the machine barrel is conveyed from back to front along the spiral direction of the screw rod; the barrel is sleeved with a plurality of heating rings at regular intervals from back to front, a temperature sensor used for measuring the temperature of the position section where the heating rings are located is arranged at each heating ring, a heat dissipation port is formed in a heat dissipation cover below each heating ring, and a heat dissipation fan used for conducting air blowing, heat dissipation and cooling on the heating rings is installed at each heat dissipation port.
Further, in the screw plastic extruder, each temperature sensor and each cooling fan are connected with the control electronic box, and the control electronic box can control the start and stop of each cooling fan and the power failure of each heating coil according to the temperature detected by each temperature sensor.
Further, in the screw plastic extruder, the heat dissipation covers at positions corresponding to the respective temperature sensors are respectively provided with the observation ports.
Further, in the screw plastic extruder, a mesh plate is further arranged at the joint of the cylinder and the machine head.
Further, in the screw plastic extruder, a bottom discharge port of the drying hopper is hermetically connected with a top feed port of the feeding hopper through a connecting pipe, a feeding valve is arranged between the bottom discharge port of the drying hopper and the connecting pipe, and a discharge port of the vacuum suction machine is hermetically connected with the top feed port of the drying hopper; an air outlet is formed in the top of the drying hopper, the air outlet pipe is hermetically connected with the air outlet, and a filtering device which enables air to pass through but prevents particle dust from passing through is arranged between the air outlet and the air outlet pipe; the side wall of the lower section of the drying hopper is provided with a hot air inlet, and a hot air outlet of the hot air dryer is hermetically connected with the hot air inlet on the drying hopper through a hot air pipeline.
Further, in the screw plastic extruder, the side wall of the connecting pipe is provided with a discharging pipe communicated with the inner cavity of the connecting pipe, and the end of the discharging pipe is closed by a valve or a sealing cover.
Further, in the screw plastic extruder, a perspective window is provided on the side wall of the connecting pipe.
Further, in the screw plastic extruder, the driving device has a structure that: a variable frequency motor is fixedly arranged on the frame and is connected with the rear end of the screw rod through a belt transmission and a gear transmission case.
The utility model has the advantages that: through accurate control melting, plastify temperature, can not only make material can smoothly get into the aircraft nose through carrying compaction section, melting section, plastify section in the barrel, improve output, can also strengthen the plasticizing ability of melting plastify material, improve the plastify effect.
Drawings
Fig. 1 is a schematic structural view of the screw plastic extruder of the present invention.
Fig. 2 is a partially enlarged schematic view of fig. 1.
Fig. 3 is a schematic view of a part of the structure in the direction a in fig. 1.
Fig. 4 is a partially enlarged schematic view of fig. 3.
Fig. 5 is a schematic view of the structure in the direction B in fig. 1.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and preferred embodiments.
As shown in fig. 1 and fig. 2, the screw plastic extruder according to the present embodiment includes: the device comprises a rack 1, wherein a machine barrel 2 which is made of alloy steel and is subjected to nitriding treatment on the inner cavity wall is arranged on the rack 1, and the machine barrel 2 is placed in front and at the back and is horizontally arranged on the rack 1. A heat-radiating cover 4 with a plurality of heat-radiating grooves 41 is covered on the machine barrel 2. The front end of the cylinder 2 is connected to the head 21 after protruding from the front opening on the front end surface of the heat radiating cover 4. A feeding hopper 22 communicated with the inner cavity of the machine barrel is arranged on the side wall of the top of the rear end of the machine barrel 2, and the feeding hopper 22 is inserted in a vertical through hole 45 on the top surface of the heat dissipation cover 4.
As shown in fig. 3 and 4, a screw 3 made of alloy steel is inserted into the cylinder 2 through a bearing, and a thread on the screw 3 is divided into three sections from back to front: the screw thread parameters of the conveying compaction section, the melting section and the homogenizing section are different in the actual manufacturing process, and the screw thread parameters of the conveying compaction section, the melting section and the homogenizing section are set as long as the raw material is in a conveying compaction state when located in the conveying compaction section, is in a melting state when located in the melting section and is in a mixing homogenization state when located in the homogenizing section.
As shown in figure 1, the rear end of the screw 3 extends out of a rear opening on the rear end surface of the machine barrel 2 and is connected with a driving device, and the screw 3 rotates around the axis of the screw under the driving of the driving device, so that the material in the inner cavity of the machine barrel is conveyed from back to front along the spiral direction of the screw 3. The structure of the driving device described in this embodiment is: a variable frequency motor 9 is fixedly arranged on the frame 1, and the variable frequency motor 9 is connected with the rear end of the screw rod 3 through a belt transmission 91 and a gear transmission case 92.
The screw 3 and the machine barrel 2 made of alloy steel have higher corrosion resistance, wear resistance and hardness, and the service life of the screw 3 and the machine barrel 2 is greatly prolonged.
As shown in fig. 3 and 4, a plurality of heating rings 23 are uniformly sleeved on the machine barrel 2 from back to front at intervals. The number of the heating rings 23 is related to factors such as the length of the machine barrel 2, and usually 3-5 heating rings 23 are sleeved on the machine barrel 2 at regular intervals from back to front.
The temperature in the machine barrel 2 changes correspondingly with the rotation speed of the screw 3, the extrusion pressure between the screw 3 and the machine barrel 2, the heating of each heating ring 23 and the change of the ambient temperature of the extruder, so that the raw material is always melted, plasticized and extruded in the temperature range required by the processing technology, a temperature sensor for measuring the temperature of the section where the heating ring 23 is located is arranged at each heating ring 23, and an observation port 44 is respectively arranged on the heat radiation cover 4 at the position corresponding to each temperature sensor. The heat dissipation cover 4 below each heating ring 23 is provided with a heat dissipation port 42, and each heat dissipation port 42 is provided with a heat dissipation fan 43 for blowing, dissipating heat and cooling the heating ring 23. When the melting and plasticizing temperature exceeds the temperature range required by the processing technology, the cooling fans 43 are turned on to blow air to cool the heating ring 23 and the machine barrel 2, so that the melting and plasticizing temperature is within the temperature range required by the processing technology. If the melting and plasticizing temperature exceeds the temperature range required by the processing technology, the cooling fan 43 is turned on, and the heating rings 23 are powered off to accelerate the cooling of the machine barrel 2. When the melting and plasticizing temperature returns to the temperature range required by the processing technology, the heating rings 23 are electrified to be maintained in the temperature range required by the processing technology.
And a control electronic box is also arranged on the frame 1, and each temperature sensor and each cooling fan 43 are connected with the control electronic box. The control electronic box can control the on and off of each cooling fan 43 and the power-off or non-power-off of each heating coil 23 according to the temperature detected by each temperature sensor.
As shown in fig. 3 and 4, in the present embodiment, a mesh plate 5 is further disposed at a connection portion between the machine barrel 2 and the machine head 21, and the mesh plate 5 can filter out impurities in the molten and plasticized material to improve the extrusion quality, and can also guide the movement direction of the molten and plasticized material moving along the screw spiral direction to a linear forward movement direction to further improve the extrusion quality.
The screw plastic extruder can be produced by extruding various plastic particle raw materials such as soft polyvinyl chloride, hard polyvinyl chloride, polyethylene, polypropylene and the like. The plastic product is obtained by extrusion matching of the screw 3 and the machine barrel 2 in a common environment and heating by the aid of the heating ring 23, and conveying and compacting, melting, mixing and homogenizing of raw materials and extrusion of a machine head. However, some materials generate steam when heated in the cylinder 2, which causes defects such as bubbles and cracks in the final plastic product, and therefore, the raw materials of these materials need to be dried before entering the feeding hopper 22, so that the probability of defects such as bubbles and cracks is greatly reduced. As shown in fig. 1, 2 and 5, in the present embodiment, the bottom discharge port of the drying hopper 6 is hermetically connected to the top feed port of the feeding hopper 22 through the connecting pipe 7, and a feeding valve 73 is disposed between the bottom discharge port of the drying hopper 6 and the connecting pipe 7. The discharge hole of the vacuum suction machine 10 is hermetically connected with the top feed inlet of the drying hopper 6. The air outlet 61 has been seted up at dry hopper 6 top, go out tuber pipe 62 and air outlet 61 sealing connection, be provided with the filter equipment that makes wind pass through and the unable passing through of granule dust between air outlet 61 and play tuber pipe 62, this kind of filter equipment that makes wind pass through and the unable passing through of granule dust is very common, belongs to mature technique, and the filter equipment who has above-mentioned function is only applied here, rather than carrying out improved design to filter equipment's structure, therefore does not expand the structure of specific filter equipment here and give unnecessary details. A hot air inlet 63 is arranged on the side wall of the lower section of the drying hopper 6, and a hot air outlet of the hot air dryer 8 is hermetically connected with the hot air inlet 63 on the drying hopper 6 through a hot air pipeline 81.
As shown in fig. 5, in this embodiment, a discharging pipe 71 communicating with the inner cavity of the connecting pipe is disposed on the side wall of the connecting pipe 7, and the discharging pipe 71 is closed by a valve or a sealing cover. When too much material enters the drying hopper 6 or different raw materials need to be replaced after a batch of plastic products are extruded, the valve or the sealing cover is opened, and then the raw material in the drying hopper 6 can be discharged out of the drying hopper 6. In the present embodiment, a see-through window 72 is provided in the side wall of the connection pipe 7.
The extrusion production process for raw materials which do not need drying treatment comprises the following steps: the hot air dryer 8 does not work, raw materials are sucked into the drying hopper 6 through the vacuum suction machine 8, the feeding valve 73 is opened, the raw materials enter the machine barrel 2 through the connecting pipe 7 and the feeding hopper 22, are matched with the machine barrel 2 through the screw rod 3 and are heated by the heating ring 23, and the raw materials are conveyed, compacted, melted, mixed and homogenized and are extruded by a machine head to obtain the plastic product.
The extrusion production process of the raw materials needing drying treatment comprises the following steps: the raw materials are sucked into the drying hopper 6 through the vacuum suction machine 8, hot air generated in the hot air dryer 8 enters the drying hopper 6 through the hot air pipeline 81, and the raw materials in the drying hopper 6 are dried and then discharged out of the drying hopper 6 from the air outlet pipe 62. After the drying treatment is finished, a feeding valve 73 is opened, the raw materials enter the machine barrel 2 through the connecting pipe 7 and the feeding hopper 22, the raw materials are matched with the machine barrel 2 through the screw 3 and are heated by the heating ring 23, and the raw materials are conveyed, compacted, melted, mixed, homogenized and extruded by a machine head to obtain the plastic product.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any modifications or equivalent changes made in accordance with the technical spirit of the present invention are also within the scope of the present invention.
The utility model has the advantages that: through accurate control melting, plastify temperature, can not only make material can smoothly get into the aircraft nose through carrying compaction section, melting section, plastify section in the barrel, improve output, can also strengthen the plasticizing ability of melting plastify material, improve the plastify effect.
Claims (8)
1. A screw plastic extruder comprising: the frame, its characterized in that: the machine barrel is placed in front and at the back and is horizontally arranged on the rack; a heat dissipation cover with a plurality of heat dissipation grooves covers the machine barrel, the front end of the machine barrel extends out of a front opening on the front end surface of the heat dissipation cover and then is connected with the machine head, a feeding hopper communicated with the inner cavity of the machine barrel is arranged on the side wall of the top of the rear end of the machine barrel, and the feeding hopper is inserted into a vertical through hole in the top surface of the heat dissipation cover; the screw rod is arranged in the machine barrel in an inserting mode through the bearing, and the thread on the screw rod is divided into three sections from back to front: the rear end of the screw rod extends out of a rear opening on the rear end face of the machine barrel and then is connected with a driving device, and the screw rod rotates around the axis of the screw rod under the driving of the driving device, so that the material in the inner cavity of the machine barrel is conveyed from back to front along the spiral direction of the screw rod; the barrel is sleeved with a plurality of heating rings at regular intervals from back to front, a temperature sensor used for measuring the temperature of the position section where the heating rings are located is arranged at each heating ring, a heat dissipation port is formed in a heat dissipation cover below each heating ring, and a heat dissipation fan used for conducting air blowing, heat dissipation and cooling on the heating rings is installed at each heat dissipation port.
2. The screw plastic extruder of claim 1, wherein: each temperature sensor, each cooling fan all are connected with the control electronic box, and the control electronic box can be according to the temperature control that each temperature sensor detected whether opening of each cooling fan and each heating coil outage.
3. A screw plastic extruder according to claim 1 or 2, characterized in that: and the heat dissipation covers at the positions corresponding to the temperature sensors are respectively provided with an observation port.
4. A screw plastic extruder according to claim 1 or 2, characterized in that: a screen plate is arranged at the joint of the machine barrel and the machine head.
5. A screw plastic extruder according to claim 1 or 2, characterized in that: the bottom discharge port of the drying hopper is hermetically connected with the top feed port of the feeding hopper through a connecting pipe, a feeding valve is arranged between the bottom discharge port of the drying hopper and the connecting pipe, and the discharge port of the vacuum suction machine is hermetically connected with the top feed port of the drying hopper; an air outlet is formed in the top of the drying hopper, the air outlet pipe is hermetically connected with the air outlet, and a filtering device which enables air to pass through but prevents particle dust from passing through is arranged between the air outlet and the air outlet pipe; the side wall of the lower section of the drying hopper is provided with a hot air inlet, and a hot air outlet of the hot air dryer is hermetically connected with the hot air inlet on the drying hopper through a hot air pipeline.
6. The screw plastic extruder of claim 5, wherein: the side wall of the connecting pipe is provided with a discharging pipe communicated with the inner cavity of the connecting pipe, and the end part of the discharging pipe is sealed by a valve or a sealing cover.
7. The screw plastic extruder of claim 5, wherein: the side wall of the connecting pipe is provided with a perspective window.
8. The screw plastic extruder of claim 1, wherein: the structure of the driving device is as follows: a variable frequency motor is fixedly arranged on the frame and is connected with the rear end of the screw rod through a belt transmission and a gear transmission case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020764046.1U CN212312702U (en) | 2020-05-11 | 2020-05-11 | Screw plastic extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020764046.1U CN212312702U (en) | 2020-05-11 | 2020-05-11 | Screw plastic extruder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212312702U true CN212312702U (en) | 2021-01-08 |
Family
ID=74023620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020764046.1U Active CN212312702U (en) | 2020-05-11 | 2020-05-11 | Screw plastic extruder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212312702U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114434767A (en) * | 2021-12-29 | 2022-05-06 | 西南科技大学 | Preparation method of polarizer compensation film for OLED flexible display |
| CN114603821A (en) * | 2022-02-08 | 2022-06-10 | 宁波金戈智能装备有限公司 | Foaming blow molding machine |
| CN116653257A (en) * | 2023-05-17 | 2023-08-29 | 四川新蓉电缆有限责任公司 | Improved generation B1 level cable extrusion equipment |
| CN119427694A (en) * | 2025-01-08 | 2025-02-14 | 福建省睿步智能装备有限公司 | Sheet extrusion equipment and method of use thereof |
-
2020
- 2020-05-11 CN CN202020764046.1U patent/CN212312702U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114434767A (en) * | 2021-12-29 | 2022-05-06 | 西南科技大学 | Preparation method of polarizer compensation film for OLED flexible display |
| CN114434767B (en) * | 2021-12-29 | 2023-09-12 | 西南科技大学 | Preparation method of polaroid compensation film for OLED flexible display |
| CN114603821A (en) * | 2022-02-08 | 2022-06-10 | 宁波金戈智能装备有限公司 | Foaming blow molding machine |
| CN116653257A (en) * | 2023-05-17 | 2023-08-29 | 四川新蓉电缆有限责任公司 | Improved generation B1 level cable extrusion equipment |
| CN119427694A (en) * | 2025-01-08 | 2025-02-14 | 福建省睿步智能装备有限公司 | Sheet extrusion equipment and method of use thereof |
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