TWM622634U - Ultra-polymer fiber manufacturing system - Google Patents

Abstract

An ultra-polymer fiber manufacturing system, comprising: a first drying device for removing the moisture of a mixed liquid to form a processing raw material; a spinning device for heating the processing raw material in different stages with at least four heating zones , to make the processing raw material into a semi-molten state, the spinning equipment spit out the filaments formed by the processing raw material, and after cooling to form a first wire; a hardness analysis device is used to analyze the hardness of the first wire to obtain a fiber hardness; a microcontroller to analyze whether the fiber hardness falls within a hardness range, if the analysis result is no, the microcontroller selects at least two discontinuous heating areas from the at least four heating areas to re-adjust the temperature .

Description

Ultra-polymer fiber manufacturing system

This creation is mainly about a fiber manufacturing system, especially an ultra-polymer fiber manufacturing system that can adjust the temperature of several heating zones of a spinning device in stages.

According to the conventional fiber manufacturing method, the masterbatch used to manufacture the fiber product is passed through several heating zones of a spinning device in sequence, and the several heating zones are controlled to continue the process within the same temperature range. The master batch is heated evenly, so that the master batch is directly formed into a molten state to form a processing raw material; then, the spinning equipment extrudes the processing raw material, so that it flows into a spinning box, and is discharged from the spinning box. The spinneret ejects at least one fiber filament; furthermore, the at least one fiber filament is stretched, cooled and shaped, and yarn received, etc., to complete the manufacture of the fiber product.

In the above-mentioned conventional fiber manufacturing method, since the master batch is in the molten state (ie, liquid state), the spinning equipment is almost unable to process the raw material produced by the master batch when extruding the processing raw material. The volume of the raw material is further compressed to increase the density of the finished fiber product, so that the tensile strength of the finished fiber product cannot be further improved. In addition, since several heating zones of the spinning equipment are all uniformly heating the masterbatch within the same temperature range, when the hardness of the at least one fiber filament does not meet the requirements of the finished fiber product, the conventional fiber The manufacturing method cannot immediately adjust the heating temperature of the several heating zones in stages, so that the front part of the manufactured fiber product is a waste product that does not meet the standard, and must be scrapped and discarded, which has the problem of loss of production cost.

In view of this, it is necessary to provide an ultra-polymer fiber manufacturing system to solve the above problems.

The purpose of this creation is to provide an ultra-polymer fiber manufacturing system, which can be used to adjust the temperature of several heating zones of a spinning device by stages.

In order to achieve the above object, the present invention provides an ultra-polymer fiber manufacturing system, which operates on a computer host, and includes: a first drying device for drying the mixed liquid in a hopper to remove the mixed solution. the moisture of the liquid, and form a processing raw material; a spinning equipment, with a feeding port, at least four heating zones and a discharging port, the feeding port is connected with the hopper, so that the processing raw material flows to the at least four heating zones The at least four heating zones are continuously arranged between the feeding port and the discharging port, and each heats the processed raw materials at different stages, so that the processed raw materials form a semi-molten state, and each heating zone is provided with There is a weight sensor, the weight sensor is used to detect the melt index of the processing raw material in the corresponding heating zone, so as to obtain a melting value. After being cooled by a cooling liquid, a first wire is formed; a hardness analysis device is used to analyze the hardness of the first wire to obtain a fiber hardness. After the first wire is stretched by a stretching device, a first wire is formed. Two wires; a second drying device for drying the second wire to reduce the humidity of the second wire; and a microcontroller electrically connected to the first drying device, the spinning device, the a weight sensor, the hardness analysis device and the second drying device, the microcontroller sets the drying temperature of the first drying device and the second drying device respectively between 100°C and 150°C, The microcontroller confirms whether the plurality of melting values are consistent with the value of the half-melting state. If the confirmation result is no, the microcontroller selects at least two discontinuous heating zones from the at least four heating zones to perform temperature adjustment again. Microcontrol The controller analyzes whether the fiber hardness falls within a hardness range, and if the analysis result is no, the microcontroller selects at least two discontinuous heating areas from the at least four heating areas to perform temperature adjustment again.

In some embodiments, the ultra-polymer fiber manufacturing system of the present invention may further include a first temperature sensor electrically connected to the microcontroller, and the first temperature sensor is used to measure the temperature of the cooling liquid, In order to obtain a cooling temperature, the microcontroller compares whether the cooling temperature falls within a cooling temperature range, and if the comparison result is no, the microcontroller selects at least two discontinuous heating areas from the at least four heating areas to restart. Make temperature adjustments. In this way, the heating temperature of the several heating zones can be adjusted in stages in real time, so as to avoid excessive waste products and further reduce the loss of production cost.

In some embodiments, the ultra-polymer fiber manufacturing system of the present invention may further include a second temperature sensor electrically connected to the microcontroller, and the second temperature sensor is used to measure the heat of the heating device Water temperature, to obtain a hot water temperature, the microcontroller compares whether the hot water temperature falls within a hot water temperature range, if the comparison result is no, the microcontroller selects discontinuous from the at least four heating zones At least two of the heating zones are re-adjusted in temperature. In this way, the heating temperature of the several heating zones can be adjusted in stages in real time, so as to avoid excessive waste products and further reduce the loss of production cost.

The ultra-polymer fiber manufacturing system of the present invention has the following characteristics: it can maintain the processing raw material in the spinning equipment in a semi-molten state, and extrude the processing raw material in the semi-molten state to form fiber filaments for making fibers , and check the hardness of the first wire rod produced in the production process, when the hardness of the first wire rod does not fall within the specified hardness range, adjust the temperature range of each of several heating zones of the wire drawing equipment in stages, In order to adjust the melt index of the processing raw materials, to avoid excessive fiber waste. In this way, the ultra-polymer fiber manufacturing system of the present creation can achieve the effect of improving the tensile strength and reducing the loss of the finished product.

[This creation]

1: The first drying equipment

2: Spinning equipment

21: Feeding port

22: Heating zone

23: Outlet

24: Weight sensor

3: Hardness analysis equipment

4: Second drying equipment

5: Microcontroller

6: The first temperature sensor

7: Second temperature sensor

B: Spinning box

C: stretching equipment

F: heating equipment

H: Hopper

P: Spinneret

P1: round hole

P2: long strip opening

R: Roller

S: fiber silk

T: creel

W1: The first wire

W2: Second wire

W3: Finished wire

S1: Drawing Step

S11: feeding drying step

S12: hot melt extrusion step

S13: Cooling step

S14: temperature control step

S15: Extension step

S16: yarn receiving step

S2: Setting step

[Figure 1] The system block diagram of the ultra-polymer fiber manufacturing system created by the present;

[Fig. 2] The equipment system diagram corresponding to the ultra-polymer fiber manufacturing system of this creation;

[Fig. 3] is a flow chart of the steps of the method for producing ultra-high polymer fibers of the present invention.

The embodiments of the present creation are described in detail as follows in conjunction with the drawings. The accompanying drawings are mainly simplified schematic diagrams, and only illustrate the basic structure of the present creation in a schematic way. Therefore, only the elements related to the present creation are indicated in these drawings. , and the displayed components are not drawn according to the number, shape, size ratio, etc. of the actual implementation. The size of the actual implementation is actually a selective design, and the layout of the components may be more complicated.

The following descriptions of the various embodiments refer to the accompanying drawings to illustrate specific embodiments in which the invention may be implemented. The direction terms mentioned in this creation, such as "up", "down", "front", "rear", etc., are only for reference to the direction of the attached drawings. Therefore, the directional terms used are used to describe and understand the present application, rather than to limit the present application. Additionally, in the specification, unless explicitly described to the contrary, the word "comprising" will be understood to mean the inclusion of stated elements but not the exclusion of any other elements.

Please refer to FIG. 1, which is a preferred embodiment of the ultra-polymer fiber manufacturing system of the present invention, which operates on a computer host, including: a first drying device 1, a spinning device 2, and a hardness analyzer Device 3, a second drying device 4 and a microcontroller 5, the first drying device 1, the spinning device 2, the hardness analysis device 3 and the second drying device 4 are respectively electrically connected to the micro-controller Controller 5.

Please also refer to FIG. 2 , the first drying device 1 is used for drying the mixed liquid in a hopper H to remove the moisture of the mixed liquid and form a processing raw material. Wherein, the mixed solution is the raw material for making the ultra-polymer fiber of the present creation. In this embodiment, the first drying device 1 is a dryer.

The spinning device 2 has an inlet 21 , at least four heating zones 22 and a outlet 23 . The inlet 21 communicates with the hopper H for the processing raw material to flow to the at least four heating zones 22 . The at least four heating zones 22 are continuously arranged between the inlet 21 and the outlet 23, and each use a heater to heat the processed raw material at different stages, so that the processed raw material forms a semi-molten state.

In this embodiment, the spinning device 2 is an extruder, and can extrude the processed raw material toward the discharge port 23 through a screw, so that the processed raw material flows into a spinning box B, and is discharged from the A spinneret P of the spinning box B spits out at least one filament. The number of the heating zones 22 is six, and the preset temperature ranges of the six heating zones 22, from the inlet port 21 to the outlet port 23, can be respectively: 65°C~90°C, 90°C~ 120℃, 120℃~150℃, 135℃~175℃, 175℃~205℃ and 195℃~225℃.

It is worth mentioning that the spinneret P may have a plurality of circular holes P1, and the diameters of the plurality of circular holes P1 are the same, whereby the processing raw material is extruded through the plurality of circular holes P1. In another embodiment, the spinneret P can have at least one elongated opening P2, whereby when the processing raw material is extruded through the elongated opening P2, it can be A fibrous film is formed.

Each of the heating zones 22 is provided with a weight sensor 24 , and the weight sensor 24 is used to detect the melt index (MI) of the processing raw material in the corresponding heating zone 22 to obtain a melting value. In this embodiment, the weight sensor 24 may be a melt index tester, and the model of the melt index tester may be MFI-100.

The hardness analysis device 3 is used to analyze the hardness of a first wire W1 to obtain a fiber hardness. Wherein, the spinning device 2 spits out the filament S formed from the processing raw material, and the filament S is cooled by a cooling liquid to form the first wire rod W1. In this embodiment, the hardness analysis device 3 is a textile hardness tester.

The second drying device 4 is used for drying a second wire W2 to reduce the humidity of the second wire W2. Wherein, the second wire rod W2 is formed after the first wire rod W1 is stretched by a stretching device C. In this embodiment, the second drying device 4 is a dryer.

The microcontroller 5 is electrically connected to the first drying device 1, the spinning device 2, the melt index detection device 3, the hardness analysis device 4 and the second drying device 4. The microcontroller 5 can be Any electronic device with computing and signal generating functions can be, for example, a programmable logic controller (PLC), a digital signal processor (DSP) or a circuit board with the above functions.

Specifically, the microcontroller 5 sets the drying temperatures of the first drying device 1 and the second drying device 4 to be between 100°C and 150°C, respectively. In addition, the microcontroller 5 can set the baking time of the first drying device 1 between 15 and 60 minutes, and the baking time of the second drying device 4 at 48 hours. The microcontroller 5 confirms whether the several melting values are consistent with the value of the half melting state. If the confirmation result is yes, no additional action is required; if the confirmation result is no, the microcontroller 5 is heated by the at least four In the zone 22, at least two discontinuous heating zones 22 are selected for temperature adjustment.

For example, when the number of the heating zones 22 is six, the microcontroller 5 can select the first heating zone, the third heating zone and the fifth heating zone for temperature adjustment, or the microcontroller The device 5 can select the second heating zone, the fourth heating zone and the sixth heating zone for temperature adjustment, and make the respective melting values of the processing raw materials located in the corresponding heating zone 22 conform to the values of the semi-melting state, so that the The processing feedstock is maintained in a semi-molten state.

The microcontroller 5 obtains the hardness of the first wire W1 from the hardness analysis device 3, and analyzes whether the hardness of the first wire W1 falls within a hardness range. If the analysis result is yes, no additional action is required. ; If the analysis result is no, the microcontroller 5 re-adjusts the temperature of the at least two heating zones 22 .

The ultra-polymer fiber manufacturing system of the present invention may also have a first temperature sensor 6 electrically connected to the microcontroller 5, and the temperature sensor 6 is used to measure the temperature of the cooling liquid to obtain a cooling temperature, The microcontroller 5 compares whether the cooling temperature falls within a cooling temperature range, and if the comparison result is yes, no additional action is required; if the comparison result is no, the microcontroller 5 performs the at least two heating zones 22 Repeat the temperature adjustment again. In this embodiment, the cooling temperature range is between 1°C and 25°C.

The ultra-polymer fiber manufacturing system of the present invention may also have a second temperature sensor 7 electrically connected to the microcontroller 5, and the second temperature sensor 7 is used to measure the temperature of the hot water of a heating device F, To obtain a hot water temperature, the heating device F is used to heat the stretched first wire W1 to soften the first wire W1. Specifically, the heating device F can be a thermoplastic tank, and the stretched first wire W1 can be soaked in hot water in the thermoplastic tank for softening.

The microcontroller 5 compares whether the hot water temperature falls within a hot water temperature range, and if the comparison result is yes, no additional action is required; if the comparison result is no, the microcontroller 5 at least The temperature of the second heating zone 22 is adjusted again. In this embodiment, the temperature range of the hot water is between 100°C and 150°C.

For example, when the ultra-polymer fiber manufacturing system of the present invention is in use, the microcontroller 5 can control the heaters of the several heating zones 22 of the spinning device 2, respectively at 65°C~90°C, 90°C~ At temperatures of 120°C, 120°C-150°C, 135°C-175°C, 175°C-205°C, and 195°C-225°C, the processed raw materials are heated in different stages to maintain the processed raw materials in a semi-molten state. The microcontroller 5 continuously receives the fiber hardness returned by the hardness analysis device 3, the cooling temperature returned by the first temperature sensor 6, and the hot water temperature returned by the second temperature sensor; When the fiber hardness is lower than the hardness range, the microcontroller 5 can choose to adjust the temperature range of the first heating zone 22 , the third heating zone 22 and the fifth heating zone 22 to 67° C.~92° C. respectively. ℃, 122℃~152℃, and 177℃~207℃; or, when the cooling temperature is lower than the cooling temperature range, the microcontroller 5 can select the first heating zone 22 and the third heating zone 22 and the temperature range of the fifth heating zone 22 are adjusted to 67°C~92°C, 122°C~152°C and 177°C~207°C respectively; when the cooling temperature is higher than the cooling temperature range, the microcontroller 5 can Choose to adjust the temperature range of the second heating zone 22, the fourth heating zone 22 and the sixth heating zone 22 to 88°C~118°C, 133°C~171°C and 193°C~223°C respectively; or , when the hot water temperature is lower than the hot water temperature range, the microcontroller 5 can choose to adjust the temperature range of the first heating zone 22, the third heating zone 22 and the fifth heating zone 22 to be respectively 67°C~92°C, 122°C~152°C and 177°C~207°C; when the hot water temperature is higher than the hot water temperature range, the microcontroller 5 can select the second heating zone 22, the fourth heating zone The temperature ranges of the heating zone 22 and the sixth heating zone 22 are adjusted to 88°C to 118°C, 133°C to 171°C, and 193°C to 223°C, respectively. Thereby, in order to adjust the melt index of the processing raw material located in the spinning equipment 2, the hardness of the finished wire rod finally produced can reach the required standard.

Please refer to FIG. 3 , which is a preferred embodiment of the method for manufacturing ultra-high polymer fibers of the present invention, which includes: a drawing step S1 and a shaping step S2 .

In this embodiment, the drawing step S1 includes a feeding and drying step S11, a hot melt extrusion step S12, a cooling step S13, a temperature control step S14, an extension step S15 and a yarn receiving step S16.

The feeding and drying step S11 is used to mix a fiber slurry with several colloidal particles to form the mixed solution; put the mixed solution into the hopper H, and dry the mixed solution with hot air through the first drying device 1 Moisture is removed to form the above processing feedstock. Wherein, the baking temperature of the first drying device 1 is between 100° C. and 150° C., and the baking time of the first drying device 1 may be between 15 and 60 minutes.

In this embodiment, the fiber slurry can be selected from cotton fibers, polyester fibers, viscose fibers, modal fibers, ultra-high molecular weight polyethylene fibers, polypropylene fibers, aramid fibers, polyamide fibers , polyethylene terephthalate fiber, polyethylene naphthalate fiber, extended chain polyvinyl alcohol fiber, extended chain polyacrylonitrile fiber, polybenzoxazole fiber, polybenzothiazole fiber, liquid crystal copolymer It is composed of at least one fiber selected from polyester fiber, rigid rod fiber, glass fiber, structural-grade glass fiber and resistance-grade glass fiber. The plurality of colloidal particles can be powder-like fine particles, which cannot be directly made into master batches, the plurality of colloidal particles can be thermoplastic polyurethane colloidal particles, and the thermoplastic polyurethane colloidal particles can comprise thermoplastic polyurethane (TPU), Polyethylene (PE), Polypropylene (PP), Polyethylene Terephthalate (PET), Polyamide (PA), Polybutylene Terephthalate (PBT), Vinyl Ester Copolymer (EVA) ), ethylene-acetic acid or nylon (Nylon).

The hot-melt extrusion step S12 is used to supply the processing raw material to the above-mentioned spinning device 2, and the spinning device 2 has the above-mentioned at least four heating zones 22, and each of the at least four heating zones 22 uses a heater to process the processing raw material. Different stages of heating to form the processed raw material into a semi-molten state. The spinning device 2. The processed raw material can be extruded toward the above-mentioned discharge port 23 through a screw, so that the processed raw material flows into the above-mentioned spinning box B, and the above-mentioned at least one filament is spit out from the above-mentioned spinneret P of the spinning box B. S.

The cooling step S13 is used for cooling the at least one fiber S with the cooling liquid, so that the surface of the at least one fiber S is shaped to form the first wire W1. In this embodiment, the cooling liquid may be water or oil.

In some embodiments, the cooling step S13 may also measure the temperature of the cooling liquid through the first temperature sensor 6 to obtain the cooling temperature. The controller 5 selects at least two discontinuous heating zones 22 among the at least four heating zones 22 for temperature adjustment; otherwise, the micro-controller 5 may not need to perform additional actions.

The temperature control step S14 is used to analyze the hardness of the first wire W1 through the hardness analysis device 3. If the hardness of the first wire W1 does not fall within the hardness range, the microcontroller 5 is used to heat the at least two wires. Zone 2 performs temperature adjustment again; otherwise, the microcontroller 5 may not need to perform additional actions.

The stretching step S15 is used to make the first wire W1 pass through the above-mentioned stretching device C (first stretching device), and the first wire W1 is stretched by several rollers of the first stretching device. Specifically, the plurality of rollers are arranged in a regular arrangement with a fixed distance, so that the rotation speed of the plurality of rollers and the tension applied to the first wire can be controlled through the microcontroller 5 to adjust the first wire. The cross-sectional shape and thickness of the wire rod W1.

Subsequently, the stretching step S15 heats the stretched first wire rod W1 with the above-mentioned heating device F to soften the first wire rod W1; drawing equipment), and drawing again to form the above-mentioned second wire rod W2.

It is worth mentioning that, in the extending step S15, the number of the stretching device C and the heating device F can be set according to requirements, so as to repeatedly heat and stretch the first wire W1 to form the second wire W1. Wire W2. For example, but not limitation, the number of the stretching equipment C may be N (N≧2), the number of the heating equipment F may be N−1, and the number of the first stretching equipment, the first heating equipment, the first heating equipment The sequence of 2 stretching equipment, 2 heating equipment, ..., N-1 th stretching equipment, N-1 th heating equipment and N th stretching equipment, for the passage of the first wire rod W1, and finally forming the th Second wire W2.

In some embodiments, the extending step S15 may also measure the temperature of the hot water of the heating device F through the second temperature sensor 7 to obtain the temperature of the hot water. If the temperature of the hot water does not fall within the temperature of the hot water In the temperature range, the temperature of the at least two heating zones 22 is adjusted again through the microcontroller 5 .

The yarn winding step S16 is used for winding the second wire W2 on a drum R by a winding method. Specifically, several drums R can be set on a winding frame T, and through the centrifugal rotation of each drum R, the second wire rod W2 can be rotated synchronously along the corresponding drum R, and then wound on the The roller R is formed in a state of a circle.

The setting step S2 is used to make the second wire W2 wound on the reel R pass through the above-mentioned stretching device C (third stretching device), so that the rollers of the third stretching device The wire rod W2 is stretched; the stretched second wire rod W2 is dried with the above-mentioned second drying equipment 4 to further reduce the humidity of the second wire rod W2; the dried second wire rod W2 is passed through as described above Drawing device C (fourth drawing device), and drawing again to form a finished wire rod W3. Wherein, the baking temperature of the second drying device 4 is between 100° C. and 150° C., and the baking time of the second drying device 4 may be 48 hours.

In the shaping step S2, the finished wire rod W3 can be wound up by controlling the rotation of the drum R, or the finished wire rod W3 can be dropped by controlling the rotation of a container and utilizing the centrifugal rotation of the container. The shape inserted into the container will form a circle along the container, but not limited thereto.

In some embodiments, before and after drying in the shaping step S2, the number of stretching devices C through which the second wire W2 passes can be set according to requirements, and the second wire W2 passes through the stretching before and after drying. The number of devices C can be at least one, that is, the second wire W2 before drying can be repeatedly stretched through several stretching devices C or/and after drying can be repeatedly stretched through several stretching devices C. The second wire W2 is stretched.

Based on the above, the ultra-polymer fiber manufacturing system of this creation can maintain the processing raw material in the spinning equipment in a semi-molten state, and extrude the semi-molten state of the processing raw material to form a fiber for making fiber. Fiber filaments, and check the hardness of the first wire rod produced in the production process. When the hardness of the first wire rod does not fall within the specified hardness range, adjust the temperature of each of several heating zones of the spinning equipment in stages. range to adjust the melt index of the raw material to avoid excessive fiber waste. In this way, the ultra-polymer fiber manufacturing system of the present creation can achieve the effect of improving the tensile strength and reducing the loss of the finished product.

The embodiments disclosed above are only illustrative of the principles, features and effects of this creation, and are not intended to limit the scope of implementation of this creation. Modifications and changes are made to the above-described embodiments. Any equivalent changes and modifications made by using the contents disclosed in this work shall still be covered by the following patent application scope.

1: The first drying equipment

2: Spinning equipment

24: Weight sensor

3: Hardness analysis equipment

4: Second drying equipment

5: Microcontroller

6: The first temperature sensor

7: Second temperature sensor

Claims (3)

A manufacturing system for ultra-high polymer fibers, which operates on a computer host, comprising: a first drying device for drying the mixed solution in a hopper to remove the moisture of the mixed solution and form a processing raw material; A wire drawing device has a feeding port, at least four heating zones and a discharging port, the feeding port is connected to the hopper for the processing raw material to flow to the at least four heating zones, and the at least four heating zones are continuously arranged in The processing raw material is heated at different stages between the feeding port and the discharging port to make the processing raw material form a semi-molten state. Each heating zone is provided with a weight sensor. The weight sensing The device is used to detect the melt index of the processing raw material in the corresponding heating zone to obtain a melting value. The spinning device spit out filaments formed from the processing raw materials, and the filaments are cooled by a cooling liquid to form a first wire; A hardness analysis device is used for analyzing the hardness of the first wire to obtain a fiber hardness. After the first wire is stretched by a stretching device, a second wire is formed; a second drying device for drying the second wire to reduce the humidity of the second wire; and A microcontroller is electrically connected to the first drying device, the spinning device, the weight sensor, the hardness analysis device and the second drying device, and the microcontroller is the first drying device and the second drying device. The drying temperatures of the second drying equipment are respectively set between 100°C and 150°C. The microcontroller confirms whether the several melting values are in conformity with the values in the half-melting state. If the confirmation result is no, the microcontroller controls the Selecting at least two discontinuous heating zones among the at least four heating zones to perform temperature adjustment again, the microcontroller analyzes whether the fiber hardness falls within a hardness range, and if the analysis result is no, the microcontroller uses the at least four heating zones to perform temperature adjustment again. Select at least two non-consecutive heating zones in the zone to perform temperature adjustment again. The manufacturing system of the ultra-high polymer fiber according to claim 1, further comprising a first temperature sensor electrically connected to the microcontroller, and the first temperature sensor is used to measure the temperature of the cooling liquid, so as to Obtaining a cooling temperature, the microcontroller compares whether the cooling temperature falls within a cooling temperature range, and if the comparison result is no, the microcontroller selects at least two discontinuous heating areas from the at least four heating areas to perform the process again temperature adjustment. The manufacturing system for ultra-high polymer fibers according to claim 1, further comprising a second temperature sensor electrically connected to the microcontroller, and the second temperature sensor is used to measure the hot water of the heating device temperature to obtain a hot water temperature, the microcontroller compares whether the hot water temperature falls within a hot water temperature range, if the comparison result is no, the microcontroller selects discontinuous heating zones from the at least four heating zones At least two heating zones are re-temperature adjusted.

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