JP2004058472A - Extruder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method in which the drying of a ceramic raw material in the vacuum chamber of an extruder is prevented surely by supplying the vapor of a molding assistant into the vacuum chamber, and an equivalent amount of the molding assistant removed with air in the vacuum chamber by a vacuum means and evaporated is supplied toward the vacuum chamber. <P>SOLUTION: In the vacuum type extruder 10 having the vacuum chamber 16, the vacuum means for evacuating the vacuum chamber 16 is connected to the vacuum chamber 16, and a vapor supply means 32 for supplying the vapor of the molding assistant L toward the vacuum chamber 16 is provided. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an extruder for extruding ceramic raw materials, and more particularly to a vacuum extruder having a vacuum chamber for removing air in the raw materials.
[0002]
[Prior art]
In general, ceramic raw materials containing molding aids such as moisture and binder are extruded by an extruder to obtain extruded products that maintain the product form such as tiles, bricks, pipes, honeycomb bodies, and clay tiles. It is known that an extruded body can be obtained as a secondary material, such as waste ground and clay for potter's wheel molding.
It is also known that in the process of extruding a ceramic raw material by an extruder, air remaining in the raw material is removed to prevent problems such as lamination that is likely to occur in an extruded product.
For this reason, in the conventional extruder, a vacuum chamber is provided in the main body of the extruder, and the air of the ceramic raw material in the extruder can be removed through negative pressure means such as a vacuum pump connected to the vacuum chamber. Had been.
[0003]
For example, in the extruder 80 shown in FIG. 4, an upper main body 82 and a lower main body 84 are connected via a vacuum chamber 86.
Further, an upper screw 88 for kneading and extruding the ceramic raw material M into the vacuum chamber 86 was provided in the upper main body 82 of the extruder 80.
On the other hand, a lower screw 90 for extruding the ceramic raw material M to the discharge port was provided in the lower main body portion 84 below the vacuum chamber 86.
Negative pressure means such as a vacuum pump 94 was connected to the vacuum chamber 86 through a pipe 92.
Further, a screen 96 having a large number of through-holes 98 was provided at a connection portion between the upper main body portion 82 and the vacuum chamber 86 so as to granulate and drop the ceramic raw material M extruded by the upper screw 88.
[0004]
According to the extruder 80, the ceramic raw material M filled in the upper main body portion 82 is extruded in a granular form through the screen 96 while being kneaded by the driving of the upper screw 88, so that the raw material M is directed toward the lower part of the vacuum chamber 86. It is dropped and deposited on the lower part of the vacuum chamber 86.
At this time, since the inside of the vacuum chamber 86 is maintained in a reduced pressure state through negative pressure means such as a vacuum pump 94, the air contained in the ceramic raw material M extruded from the screen 96 is removed.
The ceramic raw material M deposited in the lower portion of the vacuum chamber 86 is extruded from the lower portion of the vacuum chamber 86 toward the lower main body portion 84 by driving the lower screw 90, and is extruded from a discharge port provided in the lower main body portion 84. It is pushed out as a body W.
[0005]
Therefore, the ceramic raw material M constituting the extruded extruded product W forms a dense structure in which no excess air remains, and as a result, the obtained extruded product W is such that defects such as lamination are suppressed. It becomes.
[0006]
[Problems to be solved by the invention]
However, in the conventional extruder 80, the obtained extruded product W may still have a problem.
That is, although the ceramic raw material M is extruded through the through hole 98 of the screen 96, the ceramic raw material M sometimes adheres to the inner wall of the vacuum chamber 86 around the through hole 98 or while falling.
Then, the attached ceramic raw material M continuously receives the suction effect of the negative pressure means, and not only the air contained in the ceramic raw material M but also, for example, a forming aid represented by moisture evaporates from the ceramic raw material M. However, by being sucked together with air, the attached ceramic raw material M was sometimes dried.
Then, the attached ceramic raw material M may be separated from the periphery of the through hole 98 or the inner wall of the vacuum chamber 86, and the dried ceramic raw material M may be mixed with the non-dried ceramic raw material M.
As described above, the conventional apparatus has a problem that, for example, when the dried ceramic raw material M is mixed with the ceramic raw material M in a normal state, it causes deformation or cracking of the extruded body W obtained thereafter. there were.
[0007]
In view of the above problems, an object of the present invention is to prevent the drying of ceramic raw materials in a vacuum chamber by supplying steam of a molding aid into a vacuum chamber of an extruder.
Furthermore, by supplying a considerable amount of the forming aid removed and evaporated together with the air in the vacuum chamber by the negative pressure means to the vacuum chamber, the drying of the ceramic raw material in the vacuum chamber is more reliably prevented. is there.
[0008]
Means and Effects of the Invention
In order to achieve the above object, the extruder according to claim 1 is a vacuum extruder having a vacuum chamber, wherein a negative pressure means for bringing the vacuum chamber into a negative pressure state is connected to the vacuum chamber. A steam supply means for supplying steam of the molding aid is connected to the vacuum chamber.
[0009]
Since the invention according to claim 1 is configured as described above, the vacuum chamber of the extruder is kept in a reduced pressure state by negative pressure means, and when the ceramic raw material passes through the vacuum chamber, the air contained in the ceramic raw material is reduced. Is removed.
Then, even if a part of the ceramic raw material does not pass through the vacuum chamber and remains, the vapor of the molding aid is supplied to the vacuum chamber by the vapor supply means connected to the vacuum chamber. Some ceramic raw materials remaining in the room do not dry.
[0010]
The first aspect of the present invention has the above configuration, and thus has the following effects.
Even if a part of the ceramic raw material does not pass through the vacuum chamber and remains, the vapor of the molding aid is supplied to the vacuum chamber by the steam supply means connected to the vacuum chamber and remains in the vacuum chamber. Since some ceramic raw materials do not dry and the dried ceramic raw materials do not mix with the normal ceramic raw materials, the extruded product obtained by the extruder is composed of dense and homogeneous ceramic raw materials Will be.
Therefore, defects such as deformation and cracks in the extruded body can be suppressed.
[0011]
According to a second aspect of the present invention, there is provided the extruder according to the first aspect, wherein the steam supply means includes a supply path connected to the vacuum chamber, and an auxiliary container containing a molding auxiliary. A heating means for heating the molding aid in the container.
[0012]
Since the invention according to claim 2 is configured as described above, the molding aid in the auxiliary container is heated by the heating means to evaporate the molding aid, and the vapor of the molding aid is vacuumed through the supply path. It is supplied indoors.
[0013]
The invention according to claim 2 has the following effects.
When the molding aid in the auxiliary container is heated, the molding aid evaporates and the vapor of the molding aid is supplied into the vacuum chamber through the supply path. In this state, it is possible to supply the molding aid to the vacuum chamber, so that the molding aid can be easily handled, and the vapor of the molding aid can be stably supplied to the vacuum chamber.
[0014]
The extruder according to claim 3 is
3. The extruder according to claim 2, further comprising an auxiliary temperature sensor for measuring the temperature of the forming auxiliary in the auxiliary container, wherein the heating means controls the heating means based on the measured temperature of the auxiliary temperature sensor. A control means is provided.
[0015]
Since the invention according to claim 3 is configured as described above, the molding auxiliary in the auxiliary container is heated by the heating means, but is heated based on the temperature measured by the auxiliary temperature sensor. The control means controls the heating means.
Therefore, the molding aid in the heated auxiliary container can maintain a predetermined temperature, and the vapor of the molding aid obtained by heating the molding aid maintains a constant atmosphere.
[0016]
The invention according to claim 3 has the following effects.
The heating control means controls the heating means based on the measured temperature of the molding aid by the temperature sensor for the aid, and the molding aid in the container for the heated assistant can maintain a predetermined temperature, and the Since the vapor of the molding aid obtained by heating can maintain a constant atmosphere, the vapor supplied into the vacuum chamber always exerts a constant action on the ceramic raw material in the vacuum chamber.
Therefore, in addition to preventing the drying of some ceramic raw materials remaining in the vacuum chamber, the influence of the vapor of the molding aid on the ceramic raw materials passing through the vacuum chamber is always constant, and the extrusion obtained by the extruder It can further contribute to the homogenization of the molded body.
[0017]
The extruder according to claim 4,
4. The extruder according to claim 3, further comprising a raw material temperature sensor for measuring a raw material temperature in the extruder, and controlling the heating means based on the measured temperature of the raw material temperature sensor and the measured temperature of the auxiliary agent temperature sensor. Control means for performing the control.
[0018]
Since the invention according to claim 4 is configured as described above, the molding aid in the auxiliary container is heated by the heating means. The heating control means controls the heating means based on the measured temperature of the ceramic raw material near the vacuum chamber by the temperature sensor for use.
Therefore, even if the temperature of the ceramic raw material near the vacuum chamber fluctuates, the molding aid in the auxiliary container is heated by the heating means so as to follow the fluctuation of the temperature of the ceramic raw material.
[0019]
The invention described in claim 4 has the following effects.
The heating control means controls the heating means based on the temperature of the molding aid measured by the temperature sensor for the auxiliary agent and the temperature of the ceramic raw material measured near the vacuum chamber by the temperature sensor for the raw material. However, since the molding aid in the auxiliary container is heated by the heating means so as to follow the fluctuation of the temperature of the ceramic raw material, the steam supplied to the vacuum chamber is supplied to the ceramic raw material passing through the vacuum chamber. Optimal conditions are provided for the temperature.
Therefore, in addition to preventing the drying of some ceramic raw materials remaining in the vacuum chamber, the effect of the molding aid vapor on the ceramic raw materials passing through the vacuum chamber is always optimal according to the temperature of the ceramic raw materials. And does not impair homogenization of the extruded product obtained by the extruder.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
An extruder 10 according to an embodiment of the present invention will be described with reference to the drawings.
The present invention is not limited to the embodiments described below, and various modifications can be made within the scope of the invention.
FIG. 1 is a side view showing a main part of an extruder according to this embodiment in a cutaway view, and FIG. 2 is a side view showing a main part of an extruder according to another embodiment in a cutaway view. FIG. 3 is a side view of a main part of an extruder according to still another embodiment cut away. FIG. 4 is a side view in which a main part of the conventional extruder is cut away.
[0021]
Here, as the raw material of the extruded product, the ceramic raw material M is mainly composed of clay, and the molding aid L of the ceramic raw material M is water.
Here, the molding aid is for increasing the plasticity of the ceramic raw material M,
Usually, it is a liquid as represented by water, and various kinds of binders other than water generally include organic substances.
[0022]
As shown in FIG. 1, an extruder 10 according to this embodiment includes an upper main body 12 and a lower main body 14 having a cylindrical shape, and a vacuum is connected to connect the upper main body 12 and the lower main body 14. A chamber 16 is provided.
An upper screw 18 is provided in the upper main body 12, and the upper screw 18 is rotated by a driving source (not shown).
The upper main body 12 is connected to the upper side of one side of the vacuum chamber 16, but a screen 20 having a large number of through holes 22 is attached to an end of the upper main body 12, and the upper main body 12 is connected to the upper main body 12. The mounted screen 20 faces the inside of the vacuum chamber 16.
[0023]
On the other hand, the lower main body 14 is connected to the lower side of the other side of the vacuum chamber 16, and a lower screw 24 is provided in a range from the inside of the lower main body 14 to the lower part of the vacuum chamber 16. The screw 24 is designed to rotate.
A discharge port 26 is provided at the other end of the lower main body 14.
On the other hand, a vacuum pump 30 as a negative pressure means is connected to the vacuum chamber through a pipe 28. By driving the vacuum pump 30, air in the vacuum chamber 16 is sucked, and a reduced pressure state in the vacuum chamber 16 is maintained. It is planned to be able to.
[0024]
Next, the steam supply means 32, which is a feature of the extruder 10 of this embodiment, will be described.
The steam supply means 32 is for supplying the vapor of the molding auxiliary L to the vacuum chamber 16. In this embodiment, the auxiliary container 34, a supply path 36 such as a pipe, an electric heater 44, Temperature sensor 40 and a control unit 42.
An auxiliary container 34 is connected to the vacuum chamber 16 of the extruder 10 through a supply path 36 such as a pipe.
The auxiliary container 34 is for storing water as the molding auxiliary L, and the auxiliary container 34 can be hermetically sealed in order to maintain the reduced pressure state of the vacuum chamber 16.
[0025]
The auxiliary agent container 34 is provided with an electric heater 44 as a heating means.
The configuration is such that the molding auxiliary L in the auxiliary container 34 can be heated.
The electric heater 44 is connected to a control unit 42 which is a separately provided heating control means, and can change the heating temperature freely under the control of the control unit 42.
[0026]
The auxiliary container 34 is provided with an auxiliary temperature sensor 40 so that the temperature of the molding auxiliary L in the auxiliary container 34 can be measured. It is connected to the control unit 42.
Therefore, the control unit 42 can control the heating temperature of the electric heater 44 based on the measured temperature of the molding aid L measured by the assistant temperature sensor 40.
In the extruder 10, a raw material temperature sensor 48 is provided on a ceiling in the vacuum chamber 16 so that the temperature of the ceramic raw material M in the vacuum chamber 16 can be measured.
However, the measurement of the temperature of the ceramic raw material M is not limited to the inside of the vacuum chamber 16, and may be performed in the upper body 12 or the lower body 14.
[0027]
In this embodiment, the raw material temperature sensor 48 is of a non-contact type, and can measure the temperature of the ceramic raw material M deposited in the lower part of the vacuum chamber 16.
In addition, the raw material temperature sensor 48 does not measure the temperature of the ceramic raw material M, but measures the temperature of a specific location of the vacuum chamber 16, and calculates the measured temperature of the vacuum chamber 16. The measurement temperature may be calculated.
Further, the measurement temperature of a specific portion of the vacuum chamber 16 may be approximately the measurement temperature of the ceramic raw material M, or the temperature of the ceramic raw material M may be directly measured by contacting the sensor.
Therefore, the "measurement temperature of the ceramic raw material M by the raw material temperature sensor 48" referred to in this specification is calculated based on the measured temperature of the ceramic raw material M directly measured, as well as the measured temperature of a specific portion of the vacuum chamber 16. It includes the temperature of the ceramic raw material M which is considered or approximated.
[0028]
Then, based on the measurement temperature of the ceramic raw material M by the raw material temperature sensor 48 and the measurement temperature of the molding auxiliary M measured by the auxiliary temperature sensor 40, the control unit 42 responds to the temperature change of the ceramic raw material M. The heating temperature of the electric heater 44 can be appropriately controlled.
[0029]
Next, the operation of the extruder 10 according to this embodiment will be described with reference to FIG.
First, the ceramic raw material M is charged into the upper main body 12 from an input port (not shown) of the extruder 10, and the ceramic raw material M in the upper main body 12 is kneaded toward the vacuum chamber 16 by driving the upper screw 18. Be moved.
Then, the ceramic raw material M passes through the through hole 22 of the screen 20, is squeezed out into granules, reaches the inside of the vacuum chamber 16, and falls toward the lower part of the vacuum chamber 16.
At this time, the vacuum chamber 16 is in a decompressed state by the operation of the vacuum pump 30, and the residual air is removed from the ceramic raw material M squeezed into a granular form.
[0030]
On the other hand, the water as the molding auxiliary L stored in the auxiliary container 34 is heated by the electric heater 44 via the control unit 42 so that the auxiliary container 34 is filled with steam. Therefore, the filled steam is supplied to the vacuum chamber 16 through the supply path 36.
The heating temperature of the molding aid L is measured by the aid temperature sensor 40, and the electric heater 44 is controlled by the control unit 42 based on the temperature measured by the aid temperature sensor 40. The vapor pressure in the container 34 can be constant, and the vapor of the molding aid L supplied to the vacuum chamber 16 can maintain a constant supply amount.
In this case, by generating the saturated vapor pressure in the auxiliary agent container 34 so as to be higher than the saturated vapor pressure based on the temperature of the ceramic raw material M in the vacuum chamber 16, the auxiliary agent container 34 enters the vacuum chamber 16. Thus, the vapor of the molding aid L is supplied stably.
[0031]
As described above, since the steam is supplied to the vacuum chamber 16 through the supply passage 36, even if some ceramic raw material M adheres to the inner wall of the vacuum chamber 16 or the screen 20, the adhered ceramic raw material M is dried or formed. The content of the auxiliary agent L does not change.
For this reason, even if the attached ceramic raw material M falls and mixes with the ceramic raw material M deposited below the vacuum chamber 16, the homogeneity of the ceramic raw material M is not impaired.
[0032]
The ceramic raw material M deposited in the lower portion of the vacuum chamber 16 is driven by the lower screw 24, passes through the lower main body 14, and is discharged from the discharge port 26 as an extruded body W.
In the obtained extruded product W, since the ceramic raw material M constituting the extruded product W is kept homogeneous, there is little possibility that deformation or cracks will occur even after passing through processes such as drying and baking.
[0033]
Further, in this embodiment, a device for surely preventing drying of the ceramic raw material M remaining in the vacuum chamber 16 is designed, and this point will be described in detail.
The saturated vapor pressure (P2) based on the temperature (T2) of the forming auxiliary agent L in the auxiliary container 34 so as to be higher than the saturated vapor pressure (P1) based on the temperature (T1) of the ceramic raw material M in the vacuum chamber 16. ) Is described above, whereby the vapor of the molding aid L is stably supplied from the assistant container 34 to the vacuum chamber 16.
[0034]
By the way, when the temperature of the ceramic raw material M passing through the vacuum chamber 16 is stable, the saturated vapor pressure in the auxiliary agent container 34 may be kept constant. When (T1) changes, it is necessary to change the saturated vapor pressure (P2) in the auxiliary agent container 34 in accordance with the temperature (T1) of the ceramic raw material M.
Therefore, in this embodiment, the description has been given above in which the raw material temperature sensor 48 is provided on the ceiling in the vacuum chamber 16. However, the control is performed based on the measurement temperature (T1) of the ceramic raw material M by the raw material temperature sensor 48. By controlling the electric heater 44 as a heating means via the unit 42 and changing the temperature (T2) of the molding auxiliary L in the auxiliary container 34, the saturated vapor pressure (P2) in the auxiliary container 34 is changed. ) Is generated to correspond to the temperature fluctuation of the ceramic raw material M.
By such control, the vapor pressure in the vacuum chamber 16 changes from P1 to P2, and although a slight dew condensation occurs in the vacuum chamber 16, the temperature (T2) of the molding aid L with respect to the temperature (T1) of the raw material M is remarkable. By controlling so as not to make a difference, the influence of dew condensation on the raw material M can be made negligible.
[0035]
For example, when the temperature of the ceramic raw material M passing through the vacuum chamber 16 changes from 40 ° C. to 45 ° C., before the temperature of the ceramic raw material M changes, the saturation corresponding to the temperature of the ceramic raw material M of 40 ° C. The electric heater 44 may be controlled so as to generate a saturated vapor pressure higher than the vapor pressure in the auxiliary container 34, but after the temperature of the ceramic raw material M changes, the temperature of the ceramic raw material M is reduced to 45 ° C. The electric heater 44 is controlled so as to generate a saturated vapor pressure higher than the corresponding saturated vapor pressure in the auxiliary container 34.
As described above, the temperature (T1) of the ceramic raw material M passing through the vacuum chamber 16 by changing the saturated vapor pressure (P2) in the auxiliary container 34 in accordance with the temperature (T1) of the ceramic raw material M. Is supplied with almost optimal conditions.
In addition, in the extruder 10 of this embodiment, since it is only necessary to connect the steam supply means 32 to the vacuum chamber 16 of the extruder 10 provided with the vacuum pump 30, the existing extruder is used to carry out this embodiment. It is easy to convert to the extruder 10 according to the embodiment.
[0036]
Next, an extruder 11 according to another embodiment will be described.
As shown in FIG. 2, the extruder 11 according to this embodiment has the steam supply means 32 connected to the pipe 28 of the extruder 10 described above.
The reference numerals of the respective components of the extruder 11 according to this embodiment are used in common with the reference numerals of the respective components of the extruder 10 according to the above embodiment for convenience of explanation.
In this embodiment, since the steam supply means 32 is connected to the pipe 28, the steam of the molding auxiliary L generated in the auxiliary container 34 is supplied through the supply path 36 and the pipe 28.
By making the saturated vapor pressure in the auxiliary agent container 34 higher than the saturated vapor pressure of the raw material temperature M in the vacuum chamber 16, a part of the vapor of the molding auxiliary L is passed to the vacuum pump 30, but necessary. Steam is supplied through the supply path 36 and the pipe 28.
In this extruder 11, since it is only necessary to connect the steam supply means 32 to the pipe 28 of the extruder 11 provided with the vacuum pump 30, the extruder 11 according to this embodiment can be used by using an existing extruder. It is easier to retrofit.
[0037]
Next, an extruder 50 according to still another embodiment will be described.
As shown in FIG. 3, the extruder 50 according to this embodiment has only one cylindrical main body 52 and one screw 54 inside the main body 52.
A vacuum chamber 56 protruding upward is provided near the center of the main body 52, and a vacuum pump 60 is connected to the vacuum chamber 56 through a pipe 58, and the auxiliary agent container 64 is provided through another supply path 62. And the vacuum chamber 56 are connected.
The auxiliary container 64 is provided with an electric heater 66, a control unit 68 for controlling the electric heater 66, and an auxiliary temperature sensor 70 for measuring the temperature of the molding auxiliary L in the auxiliary container 64. Have been.
The vacuum chamber 56 is provided with a raw material temperature sensor 72 for measuring the temperature of the ceramic raw material M near the vacuum chamber 56, and is connected to the control unit 68 in the same manner as the auxiliary agent temperature sensor 70.
[0038]
The negative pressure means, the steam supply means, and the heating means described in the previous embodiment have basically the same configuration in this embodiment, and therefore, detailed description will be omitted with reference to the above description.
The main body 52 communicating with the vacuum chamber 56 may be provided with the screen described in the above embodiment. By providing the screen, the ceramic raw material M reaching the vacuum chamber 56 is granulated, and the ceramic raw material M It is convenient to remove air remaining in it. Further, for example, a pressing roller or the like that rotates in a direction opposite to each other may be provided in the vacuum chamber 56 to prevent the vacuum chamber 56 from being filled with ceramic materials more than necessary.
[0039]
In the auxiliary containers 34 and 64 of the extruder according to these embodiments, one end of the conduit with the on-off valve is connected to the bottom of the auxiliary containers 34 and 64, and the other end of the conduit is connected to the auxiliary. It may be connected to a tank or the like to supply the molding aid to the auxiliary containers 34 and 64 by utilizing the opening / closing operation of the on-off valve and the suction effect of the reduced pressure in the vacuum chamber. A drive source required for replenishing the agent to the auxiliary containers 34 and 64 is not required, and handling is easy.
[Brief description of the drawings]
FIG. 1 is a side view of a main part of an extruder according to this embodiment, which is cut away.
FIG. 2 is a side view showing a main part of an extruder according to another embodiment, which is cut away.
FIG. 3 is a cutaway side view of a main part of an extruder according to still another embodiment.
FIG. 4 is a side view showing a main part of the conventional extruder in a cutaway manner.
[Explanation of symbols]
10 Extruder 12 Upper Body 14 Lower Body 16 Vacuum Chamber 18 Upper Screw 20 Screen 22 Through Hole 24 Lower Screw 26 Discharge Port 28 Piping (Negative Pressure Means System)
Reference Signs List 30 Vacuum pump 32 Steam supply means 34 Aid container 36 Supply path (steam supply means system)
40 Temperature sensor for auxiliary agent 42 Control unit 44 Electric heater 48 Temperature sensor for raw material 50 Extruder 52 Main body 54 Screw 56 Vacuum chamber 58 Piping (negative pressure means system)
60 vacuum pump 62 supply path (steam supply means system)
64 Container for auxiliary agent 66 Electric heater 68 Control unit 70 Temperature sensor for auxiliary agent 72 Temperature sensor for raw material 80 Extruder (conventional)
82 Upper body 84 Lower body 86 Vacuum chamber 88 Upper screw 90 Lower screw 92 Pipe 94 Vacuum pump 96 Screen 98 Through hole M Ceramic raw material L Molding aid W Extruded body

Claims (4)

A vacuum extruder with a vacuum chamber,
Negative pressure means for making the vacuum chamber a negative pressure state is connected to the vacuum chamber,
An extruder characterized in that steam supply means for supplying steam of a molding aid is connected to a vacuum chamber. The extruder according to claim 1,
The steam supply means comprises a supply path connected to the vacuum chamber, and a container for an auxiliary agent containing a molding auxiliary agent,
An extruder comprising a heating means for heating the molding aid in the auxiliary container. The extruder according to claim 2,
An auxiliary agent temperature sensor for measuring the temperature of the forming auxiliary in the auxiliary container is provided,
An extruder comprising a heating control means for controlling a heating means based on a temperature measured by the auxiliary agent temperature sensor. The extruder according to claim 3,
A raw material temperature sensor for measuring the raw material temperature in the extruder is provided,
An extruder provided with control means for controlling a heating means based on the measured temperature of the raw material temperature sensor and the measured temperature of the auxiliary agent temperature sensor.

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