CN210308971U - Heat preservation device of extruder - Google Patents
Heat preservation device of extruder Download PDFInfo
- Publication number
- CN210308971U CN210308971U CN201921207294.XU CN201921207294U CN210308971U CN 210308971 U CN210308971 U CN 210308971U CN 201921207294 U CN201921207294 U CN 201921207294U CN 210308971 U CN210308971 U CN 210308971U
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- Prior art keywords
- sleeve
- heat preservation
- heat
- oil
- extruder
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- 238000004321 preservation Methods 0.000 title claims abstract description 51
- 238000010438 heat treatment Methods 0.000 claims abstract description 42
- 238000007789 sealing Methods 0.000 claims description 11
- 238000012856 packing Methods 0.000 claims 4
- 239000000463 material Substances 0.000 abstract description 27
- 238000001125 extrusion Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 206010053615 Thermal burn Diseases 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003000 extruded plastic Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
Images
Landscapes
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
The utility model discloses a heat preservation device of an extruder, which comprises a heat preservation cylinder and a sleeve hermetically sleeved outside the heat preservation cylinder, wherein an annular groove is formed on the inner wall of the sleeve, the annular groove is positioned at the rear end part of the sleeve and forms an oil cavity for the circulation of heat conduction oil with the outer wall of the heat preservation cylinder, and the inner wall positioned at the front end part of the sleeve is attached to the outer wall of the heat preservation cylinder; a first heating device and a second heating device are arranged outside the sleeve and respectively heat the front end part and the rear end part of the sleeve; the material flow passes through the first heat preservation area and the second heat preservation area, heat preservation and melt pressure establishment, the temperature, stress, viscosity, compactness and flow rate of the material flow are more uniform, and the quality of extruded parisons is further improved.
Description
Technical Field
The utility model relates to a PS sheet production technical field, in particular to heat preservation device of extruder.
Background
The PS sheet is a sheet material obtained by foaming and mixing PS particles and then extruding, and the extruder pushes and mixes the material through a screw rod to change the material into a viscous state. Whether extrusion temperature control is proper or not and whether the set temperature is correct or not directly determine the quality of an extruded plastic parison, and a dynamic mixer is generally additionally arranged in front of an extruder head of the existing extruder to ensure that the outer layer and the core layer of material flow can be effectively homogenized, reduce the temperature difference among all parts of the material flow and reduce the difference of the inner surface smoothness and the outer surface smoothness of sheets during extrusion. But the temperature, stress, viscosity, compactness and flow rate of the flow are not stable, and the slit width and thickness of the parison are not uniform if the flow is directly extruded.
It is seen that improvements and enhancements to the prior art are needed.
SUMMERY OF THE UTILITY MODEL
In view of the foregoing disadvantages of the prior art, an object of the present invention is to provide a heat preservation device for an extruder, which aims to adjust the temperature of the extruded material flow and improve the extrusion quality of PS sheets.
In order to achieve the purpose, the utility model adopts the following technical proposal:
a heat preservation device of an extruder comprises a heat preservation cylinder, a sleeve and a controller, wherein the sleeve is sleeved outside the heat preservation cylinder in a sealing mode, an annular groove is formed in the inner wall of the sleeve, the annular groove is located at the rear end portion of the sleeve and forms an oil cavity for circulation of heat conduction oil with the outer wall of the heat preservation cylinder, and the inner wall located at the front end portion of the sleeve is attached to the outer wall of the heat preservation cylinder; a first heating device and a second heating device are arranged outside the sleeve and respectively heat the front end part and the rear end part of the sleeve; the sleeve is provided with a temperature sensor, the temperature sensor is used for detecting the oil temperature in the oil cavity, and the controller is connected with the temperature sensor, the first heating device and the second heating device respectively.
And two ends of the sleeve are respectively provided with a sealing ring mounting groove for mounting a sealing ring, and the sealing ring is arranged in the sealing ring mounting groove.
The first heating device and the second heating device both comprise hoops and heating wires arranged on the hoops, and the hoops compress the heating wires on the outer wall of the sleeve.
The hoop comprises a wrapping portion and connecting portions arranged at two ends of the wrapping portion, through holes are correspondingly formed in each connecting portion, and the two connecting portions are connected through the through holes and bolts.
And the hoop is also provided with two wiring terminals which are electrically connected with the heating wires.
And a heat insulation film is arranged on the outer surface of the hoop.
The sleeve is provided with an oil inlet and an oil outlet which are communicated with the oil cavity, and the oil inlet and the oil outlet are connected with an oil supply device through a guide pipe.
Both ends all are provided with flange portion around the sleeve.
Has the advantages that:
the utility model provides a heat preservation device of extruder, compare among the prior art behind the material stream through the dynamic mixer directly extrude, the material stream can get into first heat preservation district earlier, first heating device heats sleeve and a heat preservation section of thick bamboo's preceding tip, make the material stream reach the extrusion temperature, then the material stream is under the propelling movement effect, get into second heat preservation district, the oil temperature value that second heating device surveyed according to temperature sensor, controller control second heating device makes the conduction oil of oil pocket maintain at the settlement temperature, thereby make the conduction oil carry out the even heating to the rear end of a heat preservation section of thick bamboo, make the material stream in this region keep extruding the temperature at the best, extrusion parison quality has greatly been improved. Preferably, the material flow is heated and insulated by the first heat-insulating area and the second heat-insulating area and the pressure of the melt is built up, so that the temperature, the stress, the viscosity, the compactness and the flow rate of the material flow are more uniform, and the quality of the extruded parison is further improved.
Drawings
Fig. 1 is a perspective view of the heat preservation device of the extruder provided by the utility model.
Fig. 2 is the internal structure schematic diagram of the heat preservation device of the extruder provided by the utility model.
Detailed Description
The utility model provides a heat preservation device of extruder, for making the utility model discloses a purpose, technical scheme and effect are clearer, clear and definite, and it is right that the embodiment is lifted with reference to the attached drawing below the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the scope of the invention.
In fig. 1, the direction of the arrows indicates the direction of flow of the streams.
Referring to fig. 1 and 2, the present invention provides a heat preservation device for an extruder, including a heat preservation cylinder 1, a sleeve 2 hermetically sleeved outside the heat preservation cylinder, and a controller (not shown in the figure), wherein an annular groove 31 is formed on an inner wall of the sleeve, an oil chamber 32 for heat conduction oil circulation is formed between a rear end portion of the sleeve of the annular groove 31 and an outer wall of the heat preservation cylinder, and an inner wall located at a front end portion of the sleeve is attached to the outer wall of the heat preservation cylinder; the first heating device 4 and the second heating device 5 are arranged outside the sleeve and are divided into a first heat preservation area S1 and a second heat preservation area S2 according to the front end part and the rear end part of the sleeve, and the first heating device 4 and the second heating device 5 respectively heat the front end part (the first heat preservation area S1) and the rear end part (the second heat preservation area S2) of the sleeve; the sleeve 2 is provided with a temperature sensor 6, the temperature sensor 6 is used for detecting the oil temperature in the oil cavity, and the controller is connected with the temperature sensor, the first heating device and the second heating device respectively. It should be noted that the heat preservation device of the extruder is arranged between the dynamic mixing device and the machine head, the material flow is pushed forward by the screw rod in the dynamic mixing device, after the material flow enters the heat preservation cylinder, the material flow is changed from spiral motion to uniform linear motion, and the material flow in the heat preservation cylinder forms melt pressure. The material flow is heated and insulated in the first heat-preserving zone because the movement direction is changed, the pressure of the formed melt needs to sacrifice certain heat, and meanwhile, the heat-preserving cylinder does not have internal heat generated by mixing of the screw and the material flow. Here, the front end of the sleeve is the end connected to the dynamic mixing device, and the rear end is the end connected to the handpiece.
During operation, material flow enters the first heat preservation area, the first heating device heats the front end parts of the sleeve and the heat preservation cylinder, the material flow reaches the extrusion temperature, then the material flow enters the second heat preservation area under the pushing action, the second heating device controls the second heating device to enable heat conduction oil of the oil cavity to be maintained at the set temperature according to the oil temperature value detected by the temperature sensor, and therefore the heat conduction oil can uniformly heat the rear end part of the heat preservation cylinder, the material flow in the area is kept at the optimal extrusion temperature, and the quality of extruded parisons is greatly improved. By additionally arranging the heat preservation device, the material flow is heated and preserved through the first heat preservation area and the second heat preservation area and the melt pressure is established, the temperature, the stress, the viscosity, the compactness and the flow speed of the material flow are more uniform, and the quality of the extruded parison is further improved.
In order to improve the sealing performance, two ends of the sleeve 2 are respectively provided with a sealing ring installation groove 71 for installing a sealing ring, and a sealing ring 72 is arranged in the sealing ring safety groove, so that the leakage of heat conduction oil is effectively prevented.
Preferably, the first heating device and the second heating device are structurally identical heating devices, and the first heating device and the second heating device comprise a hoop 8 and a heating wire (not shown) arranged on the hoop, and the hoop presses the heating wire on the outer wall of the sleeve. Through setting up like this, the heating wire installation is simple and easy, guarantees that heater strip and sleeve outer wall in close contact with heat conduction, and thermal insulation performance is good.
Preferably, referring to fig. 1, the hoop 8 includes a wrapping portion 81 and connecting portions 82 disposed at two ends of the wrapping portion, each connecting portion is correspondingly provided with a through hole (not visible in the drawing), and the two connecting portions are connected by the through hole and a bolt 83. Through setting up like this, the dismouting of the hoop of being convenient for moreover is favorable to adjusting the degree of cramping of hoop.
Preferably, the hoop is further provided with two connection terminals 84 for electrically connecting with the heating wire, and the connection terminals are electrically connected with the controller.
Preferably, the outer surface of the hoop is provided with a heat insulation film. Through setting up thermal-insulated membrane, avoid the staff mistake to touch and touch the hoop, cause the scald.
Further, both ends all are provided with flange portion 9 around the sleeve, and are connected with dynamic mixing device and aircraft nose respectively through flange portion.
Further, referring to fig. 2, an oil inlet 21 and an oil outlet 22 which are communicated with the oil cavity are arranged on the sleeve 2, the oil inlet and the oil outlet are connected with an oil supply device through a guide pipe, the oil supply device comprises a circulating pump 23 and an oil tank 24, the oil inlet is connected with the oil tank through the circulating pump, the oil outlet is connected with the oil tank through a pipeline, flow control valves 25 are arranged on the oil inlet and the oil outlet, and the flow rate of heat transfer oil and the heat preservation effect can be conveniently controlled by arranging the flow control valves.
In this embodiment, the controller preferably adopts a single chip microcomputer of the type STM32, and the temperature sensor 6 is preferably set as a thermistor NTC temperature sensor.
It is understood that equivalent substitutions or changes can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such changes or substitutions shall fall within the scope of the present invention.
Claims (8)
1. The heat preservation device of the extruder is characterized by comprising a heat preservation cylinder, a sleeve and a controller, wherein the sleeve is sleeved outside the heat preservation cylinder in a sealing mode, an annular groove is formed in the inner wall of the sleeve, the annular groove is located at the rear end portion of the sleeve and forms an oil cavity for circulation of heat conduction oil with the outer wall of the heat preservation cylinder, and the inner wall located at the front end portion of the sleeve is attached to the outer wall of the heat preservation cylinder; a first heating device and a second heating device are arranged outside the sleeve and respectively heat the front end part and the rear end part of the sleeve; the sleeve is provided with a temperature sensor, the temperature sensor is used for detecting the oil temperature in the oil cavity, and the controller is connected with the temperature sensor, the first heating device and the second heating device respectively.
2. The heat insulating device of an extruder according to claim 1, wherein the sleeve is provided at both ends thereof with a packing ring mounting groove for mounting a packing ring, respectively, and the packing ring is disposed in the packing ring mounting groove.
3. The heat-insulating device of an extruder according to claim 1, wherein the first heating device and the second heating device each comprise a hoop and a heating wire disposed on the hoop, and the hoop presses the heating wire against the outer wall of the sleeve.
4. The heat preservation device of an extruder as claimed in claim 3, wherein the hoop comprises a wrapping portion and connecting portions disposed at two ends of the wrapping portion, each connecting portion is correspondingly provided with a through hole, and the two connecting portions are connected through the through holes and bolts.
5. The heat-insulating device of the extruder as claimed in claim 3, wherein the hoop is further provided with two terminals for electrically connecting with the heating wires.
6. The heat-insulating device of an extruder of claim 3, wherein the outer surface of the hoop is provided with a heat-insulating film.
7. The heat insulating device of extruder as claimed in claim 1, wherein the sleeve is provided with an oil inlet and an oil outlet which are communicated with the oil chamber, and the oil inlet and the oil outlet are connected with an oil supply device through a conduit.
8. The heat-insulating device of an extruder according to claim 1, wherein the sleeve is provided with flange portions at both front and rear ends thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921207294.XU CN210308971U (en) | 2019-07-26 | 2019-07-26 | Heat preservation device of extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921207294.XU CN210308971U (en) | 2019-07-26 | 2019-07-26 | Heat preservation device of extruder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210308971U true CN210308971U (en) | 2020-04-14 |
Family
ID=70126633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921207294.XU Active CN210308971U (en) | 2019-07-26 | 2019-07-26 | Heat preservation device of extruder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210308971U (en) |
-
2019
- 2019-07-26 CN CN201921207294.XU patent/CN210308971U/en active Active
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