CN211891910U - Temperature control device in double-screw plastic extruding machine - Google Patents
Temperature control device in double-screw plastic extruding machine Download PDFInfo
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- CN211891910U CN211891910U CN201921829880.8U CN201921829880U CN211891910U CN 211891910 U CN211891910 U CN 211891910U CN 201921829880 U CN201921829880 U CN 201921829880U CN 211891910 U CN211891910 U CN 211891910U
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Abstract
The utility model discloses a temperature control device among double screw extruding machine, including the barrel, the hopper, the double screw, the aircraft nose, transmission, heating device and temperature sensor, be equipped with on the barrel outer wall along a plurality of zones of heating that hopper feed end to aircraft nose section temperature gradually increased progressively, every zone of heating is equipped with the heater, still be equipped with cooling device, the barrel is equipped with a plurality of cooling zones, every cooling zone is equipped with a fan, be equipped with inlet tube and outlet pipe in the screw rod, inlet tube and outlet pipe are on a parallel with the screw rod axial setting, the inlet tube is located the outlet pipe, the water inlet of inlet tube and the delivery port of outlet pipe are located same one side of screw rod, the inlet tube tip is equipped with the. Heating device heats the barrel, adopts the fan to carry out the forced air cooling to the barrel, detects the barrel temperature through temperature sensor and regulates and control, and the screw rod cools off through the water-cooling, and cooling device's the temperature of adding easily control extruding machine guarantees that the material obtains better plastify effect, puies forward high pressure heater worker quality.
Description
Technical Field
The utility model relates to a plastic processing equipment technical field, in particular to temperature control device in double screw extruding machine.
Background
When the material plastify in the double screw extruder barrel, its temperature can not be less than self viscous flow temperature, otherwise the extrusion process can be influenced, and the quality is difficult to guarantee, and the temperature can not too high again simultaneously, and too high temperature can make plastics take place decomposition reaction, leads to plastic construction to suffer destruction and unable the use. Thus, in general the extrusion temperature should be chosen to be a suitable value between the viscous flow temperature and the decomposition temperature.
In the extrusion process of the double-screw extruder, because the heat obtained by the material is not only provided by the heating device, frictional shearing heat can be generated between the material and the machine barrel and between the material and the screw. When this amount of heat is greater than the amount of heat required by the material, this can result in excessive material temperatures. At this time, in order to ensure the extrusion quality of the material, excessive heat must be discharged in time. The continuous increase of the material temperature may not be prevented within a certain time only by stopping the heating of the heater, and a cooling device is required to forcibly cool the twin-screw extruder to return the material temperature to the required value as soon as possible.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a temperature control device in double screw extruding machine adds cooling device on extruding machine heating device's basis, and the temperature of easy control extruding machine guarantees that the material can gain better plastify effect to improve the quality of goods.
In order to solve the technical problem, the utility model discloses a technical scheme does:
a temperature control device in a double-screw extruder comprises a machine barrel, a hopper above one end of the machine barrel, double screws in the machine barrel, a machine head at the other end of the machine barrel, a transmission device for driving the double screws, a heating device on the machine barrel and a temperature sensor on the machine barrel, wherein a plurality of heating zones with gradually increasing temperature from a feeding end of the hopper to a section of the machine head are arranged on the outer wall of the machine barrel, a heater is arranged in each heating zone, a hole parallel to the radial direction of the machine barrel is arranged on the outer wall of each heating zone of the machine barrel, the temperature sensor is arranged in the hole, the double-screw extruder is also provided with a cooling device, the machine barrel and the double screws are provided with a plurality of cooling zones, each cooling zone is provided with a fan, a water inlet pipe and a water outlet pipe are, the inlet tube is located in the outlet pipe, the water inlet of inlet tube and the delivery port of outlet pipe are located same one side of screw rod, the inlet tube tip is equipped with the cooling hole, the cooling hole with outlet pipe UNICOM.
Preferably, the temperature sensor is a thermocouple sensor.
Preferably, the heater is a resistance heater, the resistance heater comprises a resistance wire, a mica sheet and an iron sheet, the resistance wire is coated with the mica sheet, the mica sheet is coated with the iron sheet, and the outer wall of the machine barrel is coated with the resistance heater.
Preferably the resistive heater is a ribbon heater.
Preferably, a cooling water pipe is further arranged on the base of the hopper and wound on the base of the hopper.
Preferably, the depth of the hole is at a distance 1/3 from the barrel inner surface.
The utility model discloses temperature control device in the double screw extruder, adopt heating device to the barrel heating, adopt the fan to carry out the forced air cooling to the barrel, detect through temperature sensor and regulate and control, cool off the screw rod through the water-cooling, the temperature of fan control barrel, the fan is mutually independent in barrel each region, cooling air's flow does not influence adjacent region, the barrel cooling is even and soft, can not arouse the fluctuation of temperature, the cooling of screw rod does not participate in the temperature control of extruder simultaneously, can avoid the fluctuation of material temperature and cause whole temperature control system's unstability, on the other hand has also avoided the change of screw rod water cooling system temperature to the influence of screw rod rigidity, even take place the screw rod and twist off the accident. The cooling device is added to easily control the temperature of the plastic extruding machine, so that the materials can obtain a better plasticizing effect, and the quality of products is improved.
Drawings
FIG. 1 is a schematic diagram of a twin screw extruder according to the present invention;
FIG. 2 is a schematic diagram of a heater in a temperature control device of the twin-screw extruder of the present invention;
FIG. 3 is a schematic structural view of a temperature sensor in a temperature control device of the twin-screw extruder of the present invention;
FIG. 4 is a schematic structural view of a screw cooling device in a temperature control device of the twin-screw extruder of the present invention;
FIG. 5 is a schematic view showing a barrel cooling device in the temperature control device of the twin-screw extruder of the present invention;
in the figure, 1-machine barrel, 2-hopper, 21-base, 3-twin screw, 4-machine head, 5-transmission device, 6-heating device, 7-temperature sensor, 8-cooling device, 81-blower, 82-water inlet pipe, 821-water inlet, 83-water outlet pipe, 831-water outlet and 84-cooling hole.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1-5, a temperature control device in a twin-screw extruder, the twin-screw extruder comprises a barrel 1, a hopper 2 above one end of the barrel 1, twin screws 3 in the barrel 1, a machine head 4 at the other end of the barrel 1, a transmission device 5 for driving the twin screws, a heating device 6 on the barrel 1 and a temperature sensor 7 on the barrel 1, a plurality of heating zones with gradually increasing temperature are arranged on the outer wall of the barrel 1 along the section from the feeding end of the hopper 2 to the machine head 4, each heating zone is provided with a heater 61, a hole (not shown) parallel to the radial direction of the barrel 1 is arranged on the outer wall of each heating zone of the barrel 1, the temperature sensor 7 is arranged in the hole, the twin-screw extruder is also provided with a cooling device 8, the cooling devices 8 are arranged on the barrel 1 and the twin screws 3, every cooling zone is equipped with a fan 81, be equipped with inlet tube 82 and outlet pipe 83 in the screw rod, inlet tube 82 and outlet pipe 83 are on a parallel with the screw rod axial setting, inlet tube 82 is located in the outlet pipe 83, the water inlet 821 of inlet tube 82 and the delivery port 831 of outlet pipe 83 are located same one side of the screw rod, inlet tube 82 tip is equipped with cooling hole 84, cooling hole 84 with outlet pipe 83 UNICOM.
The blower 81 controls the temperature of the cylinder 1, the blowers 81 are independent in each area of the cylinder 1, the flow of cooling air does not influence the adjacent areas, and the cylinder 1 is cooled uniformly and softly without causing temperature fluctuation.
According to the extrusion capacity and the material conveying speed, the optimal screw cooling temperature is sought, so that when the plastic extruding machine works, cooling water is cooled at a fixed flow rate and temperature, the screw uses the cooling water with certain water temperature to perform uninterrupted circulating cooling in the working process of the plastic extruding machine, the temperature of the screw is kept relatively stable, the cooling device 8 in the screw controls the temperature of the screw, the material can obtain a good plasticizing effect, and the quality of a product is improved. The cooling of the screw does not participate in the temperature control of the extruder, so that the instability of the whole temperature control system caused by the fluctuation of the temperature of the material can be avoided, and on the other hand, the influence of the change of the water temperature of a screw water cooling system on the rigidity of the screw, even the screw twisting accident can be avoided.
The air cooling of the machine barrel 1 and the water cooling of the screw ensure that the difference between the friction coefficient of the material and the machine barrel 1 and the friction coefficient of the material and the screw is maximized, thereby obtaining the maximum solid conveying rate. Ensures that the material can obtain better plasticizing effect, thereby improving the quality of products.
The temperature sensor 7 is a thermocouple sensor. As shown in fig. 3, the depth of the hole is at 1/3 from the inside surface of barrel 1. The temperature of barrel 1 is higher than the melt temperature, the closer the bottom of the hole is to the melt, the closer the measured temperature is to the actual temperature of the melt, but if the hole is deepened by a certain amount, the mechanical strength of the barrel wall is affected.
As shown in fig. 2, the heater is a resistance heater, the resistance heater includes a resistance wire, a mica sheet and an iron sheet, the resistance wire is coated with the mica sheet, the iron sheet is coated with the mica sheet, and the outer wall of the cylinder 1 is coated with the resistance heater.
The resistance heater is a band heater. The band heater has the advantages of small size, low price in the aspect of disassembly and assembly, simple structure, easy control of heating power, high heat transfer efficiency, wide temperature range, easy maintenance and the like.
A cooling water pipe (not shown) is further arranged on the base 21 of the hopper 2, and the cooling water pipe is wound on the base 21 of the hopper 2. 2 department of hopper lasts the feeding and can produce the temperature, causes the jam in feed inlet department easily when the high temperature, makes reinforced difficulty, and 2 seats of hopper cooling can avoid the high temperature of reinforced section material. In addition, the excessive heat can be prevented from being transferred to a lubricating system of the extruding machine, the lubricating oil cannot be deteriorated, and the use rate of the lubricating oil is improved.
The utility model discloses temperature control device in double screw extruder, adopt heating device to the barrel heating, adopt the fan to carry out the forced air cooling to the barrel, detect through temperature sensor and regulate and control, cool off the screw rod through the water-cooling, fan 81 controls the temperature of barrel 1, fan 81 is mutually independent in 1 each region of barrel, cooling air's flow does not influence adjacent region, 1 cooling of barrel is even and soft, can not arouse the fluctuation of temperature, the cooling of screw rod does not participate in the temperature control of extruder simultaneously, can avoid the fluctuation of material temperature and lead to the fact whole temperature control system's unstability, on the other hand has also avoided the influence of the change of screw rod water cooling system temperature to the screw rod rigidity, take place screw rod twist-off accident even. The cooling device is added to easily control the temperature of the plastic extruding machine, so that the materials can obtain a better plasticizing effect, and the quality of products is improved.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.
Claims (6)
1. A temperature control device in a twin-screw extruder, the twin-screw extruder comprising a barrel, a hopper above one end of the barrel, twin screws in the barrel, a head at the other end of the barrel, a transmission for driving the twin screws, a heating device on the barrel, and a temperature sensor on the barrel, characterized in that: the machine comprises a machine barrel, and is characterized in that a plurality of heating zones are arranged on the outer wall of the machine barrel, the temperature of the heating zones gradually increases from the feeding end of a hopper to the temperature of a machine head section, a heater is arranged in each heating zone, a hole parallel to the radial direction of the machine barrel is formed in the outer wall of each heating zone of the machine barrel, a temperature sensor is arranged in the hole, a cooling device is further arranged on a double-screw extruder, cooling devices are arranged on the machine barrel and the double screws, the machine barrel is provided with a plurality of cooling zones, each cooling zone is provided with a fan, a water inlet pipe and a water outlet pipe are arranged in the screw, the water inlet pipe and the water outlet pipe are arranged in parallel to the axial direction of the screw, the.
2. The temperature control apparatus in a twin screw extruder of claim 1, wherein: the temperature sensor is a thermocouple sensor.
3. The temperature control apparatus in a twin screw extruder of claim 1, wherein: the heater is a resistance heater, the resistance heater comprises a resistance wire, a mica sheet and an iron sheet, the mica sheet is coated outside the resistance wire, the iron sheet is coated outside the mica sheet, and the resistance heater is coated on the outer wall of the machine barrel.
4. The temperature control apparatus in a twin screw extruder of claim 3, wherein: the resistance heater is a band heater.
5. The temperature control apparatus in a twin screw extruder of claim 1, wherein: and a cooling water pipe is also arranged on the base of the hopper and wound on the base of the hopper.
6. The temperature control apparatus in a twin screw extruder of claim 1, wherein: the depth of the hole is at a distance 1/3 from the barrel inner surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921829880.8U CN211891910U (en) | 2019-10-28 | 2019-10-28 | Temperature control device in double-screw plastic extruding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921829880.8U CN211891910U (en) | 2019-10-28 | 2019-10-28 | Temperature control device in double-screw plastic extruding machine |
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| CN211891910U true CN211891910U (en) | 2020-11-10 |
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| CN201921829880.8U Active CN211891910U (en) | 2019-10-28 | 2019-10-28 | Temperature control device in double-screw plastic extruding machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116039044A (en) * | 2022-12-15 | 2023-05-02 | 东南大学 | Heating device of plastic extruding machine and plastic extruding machine |
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2019
- 2019-10-28 CN CN201921829880.8U patent/CN211891910U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116039044A (en) * | 2022-12-15 | 2023-05-02 | 东南大学 | Heating device of plastic extruding machine and plastic extruding machine |
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