CN105773950A - Insulating system of optical cable extruding machine - Google Patents
Insulating system of optical cable extruding machine Download PDFInfo
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- CN105773950A CN105773950A CN201610322946.9A CN201610322946A CN105773950A CN 105773950 A CN105773950 A CN 105773950A CN 201610322946 A CN201610322946 A CN 201610322946A CN 105773950 A CN105773950 A CN 105773950A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 77
- 238000001125 extrusion Methods 0.000 claims abstract description 68
- 238000009413 insulation Methods 0.000 claims abstract description 32
- 238000001035 drying Methods 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims description 23
- 230000004927 fusion Effects 0.000 claims description 5
- 238000004079 fireproofing Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000004321 preservation Methods 0.000 abstract 1
- 238000003763 carbonization Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/875—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling for achieving a non-uniform temperature distribution, e.g. using barrels having both cooling and heating zones
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
本发明提供了一种光缆挤塑机保温系统，包括时间继电器、温度控制单元、温度传感单元，并且时间继电器、温度传感单元分别通过电路和温度控制单元连接，时间继电器记录停机时长，并且当停机时长超过停机时限，温度控制单元将挤塑机的各温区的温度设定值由挤塑温度切换为烘干温度，当温度降低到烘干温度后，各温区进入保温状态；当需要开机时，温度控制单元将各温区的温度设定值由烘干温度切换为挤塑温度，当各温区的温度达到挤塑温度时，挤塑机具备开机条件，其中，停机时限是根据不同的挤塑材料的耐热塑化时间来确定的。采用该保温系统，能够快速加热到生产温度，提高生产效率；能够延长螺杆的使用寿命；能够降低电能损耗。
The invention provides a thermal insulation system for an optical cable extruder, which includes a time relay, a temperature control unit, and a temperature sensing unit, and the time relay and the temperature sensing unit are respectively connected to the temperature control unit through a circuit, and the time relay records the shutdown time, and When the shutdown time exceeds the shutdown time limit, the temperature control unit switches the temperature setting value of each temperature zone of the extruder from the extrusion temperature to the drying temperature. When the temperature drops to the drying temperature, each temperature zone enters the heat preservation state; When it is necessary to start up, the temperature control unit switches the temperature setting value of each temperature zone from the drying temperature to the extrusion temperature. When the temperature in each temperature zone reaches the extrusion temperature, the extruder is ready to start. Among them, the shutdown time limit is It is determined according to the heat-resistant plasticizing time of different extrusion materials. The thermal insulation system can quickly heat up to the production temperature, improve production efficiency; prolong the service life of the screw; and reduce power consumption.
Description
Technical field
The present invention relates to optical cable processing technique field, specifically, relate to a kind of optical cable extruding machine heat-insulation system.
Background technology
Optical cable production and application is single multiple screw extruder, and single screw rod is typically in effective length to be divided into transportation section, compression section, metering section, and the material in barrel is need heating by screw rod at work.In most cases, the warm area of extruding machine barrel has 4～5, and the warm area of extruding machine head has 2～4.In extruding machine work, each warm area needs the temperature keeping meeting extrusion molding material performance.Each warm area to reach required design temperature, it is necessary to a heating process.Resistance ring type mode of heating is slow, heat radiation is slow, power consumption is big, it is generally required to more than 2 hours.For quantity-produced line cable industry, the extruding machine short time shuts down, if closing the heater of each warm area of extruding machine, reheats, it is clear that can reduce production efficiency during use.If but do not close the heater of each warm area, and it being in heated condition for a long time, the material between screw rod and barrel is owing to being in plastifying state for a long time, it is easy to carbonization occurs.Material after carbonization is easy to penetrate in screw rod or be firmly adsorbed on screw rod, causes that flight channel volume changes, and increases the viscosity in material extrusion process, in turn results in compression section pressure transient, and metering section measures inaccurate trouble.Final affect the extrusion molding effect of extruding machine, shortening screw rod service life.
Fig. 1 is the temperature control flow figure of optical cable extruding machine of the prior art, and it comprises the following steps:
Step S10, extruding machine shuts down.
Step S20, now, the temperature of each warm area is the extrusion temperature setting value A of material.
Step S30, it may be judged whether close heater, be perform S40, otherwise perform S50, does not close heater, S501, and the actual temperature of each warm area keeps extrusion temperature setting value A.
Step S40, manual-lock heater.
Step S401, the desired temperature of each warm area switches to 0.
Step S402, the actual temperature of each warm area drops to ambient temperature through time T1.
Step S403, it may be judged whether start, is perform S405, otherwise performs S404, do not start shooting, and keeps standing state.
Step S405, the temperature manually setting each warm area is extrusion temperature setting value A.
Step S406, the temperature of each warm area reaches extrusion temperature setting value A from ambient temperature elapsed time T2.
Step S60, start.
Step S70, extruding machine starts.
It can be seen that extruding machine is shut down, if each warm area of extrusion molding is also in heating, then extruding machine is always held at the desired temperature A that makes material be in extrusion molding state, and extruding machine is started shooting at any time and can be entered production status.But waste electric energy, and be easily caused in barrel to be in for a long time the material carbonization of plastifying state, affects extrusion molding effect, lower screw rod service life.If closedown heater, then each warm area temperature of extruding machine is switched to setting value 0 by setting value A, namely heater stop heating, and extruding machine each warm area temperature value elapsed time T1 is reduced to ambient temperature by desired temperature A.If do not started shooting, then it is always maintained at ambient temperature.If start, then heater again by each warm area by ambient temperature to desired temperature A, heat time heating time is T2, and its production efficiency is low.
Summary of the invention
The invention provides a kind of optical cable extruding machine heat-insulation system, the efficiency to restart production after solving the shutdown of optical cable extruding machine is low or power consumption big, continuous heating shortens the problems such as screw rod life-span.
According to an aspect of the present invention, provide a kind of optical cable extruding machine heat-insulation system, including the time relay, temperature control unit, temperature sensing unit, wherein, temperature control unit also includes extruded material and determines that unit and extrusion temperature determine unit, and the time relay, temperature sensing unit connects respectively through circuit and temperature control unit, temperature sensing unit sends the temperature value measured in real time to temperature control unit, when extruding machine is shut down, the time relay starts record and shuts down duration, the shutdown time limit is exceeded when shutting down duration, the desired temperature of each warm area of extruding machine is switched to the drying temperature of extruded material by temperature control unit by the extrusion temperature of extruded material, after temperature is reduced to the drying temperature of extruded material, each warm area enters keeping warm mode；When needs are started shooting; extruded material determines that unit knows the extruded material kind in extruding machine; and send a signal to extrusion temperature and determine unit; extrusion temperature determines that unit is according to material category; in conjunction with extrusion temperature parameter list, the desired temperature of each warm area is switched to by the drying temperature of extruded material the extrusion temperature of extruded material; when the temperature of each warm area reaches the extrusion temperature of extruded material; extruding machine possesses compressor start up condition; wherein, the described shutdown time limit is that the heat-resisting fusion time according to different extruded material is determined.
Alternatively, also including protected location, if the temperature of each warm area of extruding machine is not up to the extrusion temperature of extruded material, protected location forbids that extruding machine starts.
Alternatively, when extruding machine is switched to heated condition by keeping warm mode by temperature control unit, the time relay resets.
Alternatively, PE material described shut down time be limited to 1.5 hours.
Alternatively, PVC material described shut down time be limited to 0.5 hour.
Alternatively, PP material described shut down time be limited to 0.25 hour.
Alternatively, fire proofing described shut down time be limited to 0.5 hour.
Alternatively, temperature control unit also has the temp control switch being turned on and off for controlling heater, and described temp control switch has heating shelves, lock catch, die change shelves, starts by switching gear or traction, controls the heated condition of extruding machine.
Alternatively, when extruding machine starts under keeping warm mode, first by heating shelves, temp control switch being switched to lock catch or die change shelves, then switch back into heating shelves, extruding machine enters heated condition.
Alternatively, extruding machine launches into heated condition by traction.
The optical cable extruding machine heat-insulation system of the present invention; characteristic according to different material presets the holding temperature of each warm area and shuts down the time limit; the each warm area of extruding machine can according to the shutdown time limit set; automatically into keeping warm mode; after avoiding each warm area to stop heating on the one hand, ambient temperature again it is warmed to extrusion temperature and loses time；On the other hand avoiding each warm area to be maintained at extrusion temperature state, carbonization material is adsorbed on screw rod, affect extrusion molding effect, shortening screw rod service life.
Accompanying drawing explanation
By embodiment being described in conjunction with accompanying drawings below, the features described above of the present invention and technological merit will become apparent with easy to understand.
Fig. 1 indicates that the temperature control flow figure of the optical cable extruding machine that prior art relates to；
Fig. 2 indicates that the schematic diagram of the optical cable extruding machine heat-insulation system that the present embodiments relate to；
Fig. 3 indicates that the schematic diagram of the temperature control unit that the present embodiments relate to；
Fig. 4 indicates that the control flow chart of the optical cable extruding machine heat-insulation system that the present embodiments relate to.
Detailed description of the invention
The embodiment of optical cable extruding machine heat-insulation system of the present invention is described below with reference to the accompanying drawings.Those of ordinary skill in the art will be consequently realised that, when without departing from the spirit and scope of the present invention, it is possible to various different modes or its combination, described embodiment is modified.Therefore, accompanying drawing and description are inherently illustrative, rather than are used for limiting scope of the claims.Additionally, in this manual, accompanying drawing draws not in scale, and identical accompanying drawing labelling represents identical part.
The present embodiment provides a kind of optical cable extruding machine heat-insulation system, as shown in Figure 2, extruding machine 1 includes the time relay 2, temperature sensing unit 3, temperature control unit 4, and the time relay, temperature sensing unit connects respectively through circuit and temperature control unit, when extruding machine is shut down, the time relay starts record and shuts down duration, when shutdown duration exceedes the shutdown of setting in limited time, the temperature of extruding machine is switched to the drying temperature of material by temperature control unit from the extrusion temperature of material, and control heater and make temperature be reduced to drying temperature, it is incubated after reaching drying temperature；When extruding machine needs to start shooting, the temperature of each warm area is adjusted the extrusion temperature of material by temperature control unit by the drying temperature of material.Wherein, the shutdown time limit is that the heat-resisting fusion time according to different materials is determined.As it is shown on figure 3, more specifically, temperature control unit 4 also includes extruded material and determines that unit 41 and extrusion temperature determine unit 42.Extruded material determines that unit 41 for the material category determining in extruding machine and sends a signal to extrusion temperature and determines unit 42, and extrusion temperature determines that unit 42 is according to the material category in extruding machine, determines extrusion temperature setting value in conjunction with extrusion temperature parameter list.
Extruding machine shutdown is the trigger condition of the time relay.When extruding machine operates, the time relay is idle.Extruding machine is shut down, for instance be operated handing-over, overhaul of the equipments etc., now needs to shut down extruding machine, and the time relay is shut down from extruding machine and started to record the time.Flow chart referring to Fig. 4 describes the present embodiment in detail.
Step S100, extruding machine is shut down.S200, now the desired temperature of each warm area is still maintained at temperature when extruding machine works, even if material reaches the desired temperature A of extruding condition, it is necessary to explanation, the desired temperature that when extruding machine being run well, each warm area is different herein is collectively referred to as desired temperature A.
Step S300, the time relay starts timing.
Step S400, prescribes a time limit when shutting down when duration reaches the shutdown set, then step S500, the time relay sends a signal to temperature control unit, and by extrusion temperature setting value A, the temperature of each warm area is switched to holding temperature setting value B.Wherein, desired temperature B is the temperature value that the material in extruding machine reaches oven-dried condition.
Step S600, temperature control unit starts to adjust heater and reduces temperature, and extruding machine is reduced to desired temperature B through the T3 time from extrusion temperature value when running well.
Step S700, after reaching temperature value B, extruding machine is switched to keeping warm mode by temperature control unit.Now, S800, extruding machine is in guard mode, and extruding machine cannot start.Due to the extrusion temperature of different materials, drying temperature difference; therefore; its shutdown time limit is that the heat-resisting fusion time according to different extruded material is determined respectively, by the extruded material of temperature control unit, its extrusion temperature value shutting down time limit and each material determines that unit and extrusion temperature determine that unit is determined according to table 1.
Step S900, it may be judged whether start, if do not started shooting, then S9001, keep present state of temperature.When needs produce, then S9002, after temperature control unit obtains start-up command, temperature control unit controls heater, makes extruding machine be in heated condition.After extruded material determines the material category that unit is known in extruding machine, send a signal to extrusion temperature and determine that unit, extrusion temperature determine that unit is according to the material category in extruding machine, determines extrusion temperature setting value A in conjunction with extrusion temperature parameter list.
Step S9003, the temperature actual value elapsed time T3 of each warm area reaches extrusion temperature setting value A, now reaches compressor start up condition.
Now, step S9004 can be performed, boot up operation.
Step S9005, extruding machine starts.
In conjunction with noted earlier, it is clear that T2 > T1 > T3, it is seen then that do not have the extruding machine of heat-insulation system to need to be heated to long time to produce required temperature.And there is the extruding machine of heat-insulation system, then can reach to produce required temperature with the shorter time.
The present embodiment adopts temperature control unit; in conjunction with temperature sensing unit, the time relay, the heat-resisting fusion time according to different extrusion molding materials, determine the shutdown time limit; the shutdown time limit exceedes the material duration of resistance to thermoplastification, and extruding machine is switched to low-temperature insulation state by temperature control unit.Thus, it is prevented that long-time heating infiltration to screw rod to the damage of screw rod and the extruded material of carbonization, the service life extending screw rod effectively reduces electric energy loss.Conventional use of Φ 90 sheath extruding machine has 9 warm areas, and comprehensive heating power is 40.5 kilowatts.Use automatic heat preserving system, in heat time heating time and insulating process, all can effectively reduce electric energy loss, and effectively reduce heat time heating time more than 50%.
In one alternate embodiment, as in figure 2 it is shown, this heat-insulation system also includes protected location 5, protected location 5 is connected by circuit and temperature control unit 4, feedback control extruding machine 1.Upon power-up, whether protected location detection temperature control unit is switched to extrusion temperature by the temperature of each warm area by drying temperature, and, the temperature value in conjunction with temperature sensing unit detection judges whether the temperature of each warm area reaches extrusion molding set temperature value.If the desired temperature of warm area is not switched to extrusion temperature by temperature control unit, then protected location temp. indicator control unit switches over, and forbids that extruding machine starts.And when the design temperature of extruding machine is not up to setting value A, temperature control unit also forbids that extruding machine starts.Thus avoiding, owing to operator neglects, starting extruding machine when extrusion temperature does not arrive extrusion temperature, being damaged by extruding machine.
The extruded material that optical cable extruding machine adopts has four kinds of materials such as PE material, PVC material, PP material and flame-proof material, and table 1 is extrusion temperature parameter list, including extrusion temperature, dries the data such as temperature, heat-resistant time.
Table 1
Below in conjunction with table 1, the present embodiment is described, for instance PE material, when extruding machine works, the temperature of its each warm area is different, but is collectively referred to as extrusion temperature setting value A1 in the present embodiment, and it dries temperature is 75 DEG C, namely holding temperature setting value is B1, and its heat-resistant time is 1.5 hours.It is both provided with temperature sensor in each temperature range; when extruding machine shut down after, the time relay starts timing, when shut down duration reach 1.5 little time; the time relay sends a signal to temperature control unit, and extrusion temperature setting value A1 is switched to holding temperature setting value B1 by temperature control unit.Temperature control unit controls heater, makes the temperature of each warm area reduce, and when temperature is reduced to 75 DEG C, temperature stops reducing and being maintained at 75 DEG C.Before extruding machine is started shooting, it is necessary to first controlled heater by temperature control unit, make each temperature-raising region temperature raising to extrusion temperature setting value A1, then boot up production again.That is, after extruded material determines the material category that unit is determined in extruding machine, send a signal to extrusion temperature and determine that unit, extrusion temperature determine that unit is according to material category, is set as extrusion temperature setting value A1 in conjunction with extrusion temperature parameter list by the temperature of each warm area.And protected location can protect extruding machine by the temperature of detection switching state and each warm area.When temperature control unit does not switch to the temperature of plasticization temperature or each warm area not up to plasticization temperature, protected location forbids that extruding machine starts.And in prior art, owing to not being incubated after shutdown, when closing heater, the temperature of each warm area is reduced to ambient temperature from extrusion temperature setting value A1.During extruding machine start, then it is increased to the material plasticization temperature of each warm area from ambient temperature.Comparatively speaking, the optical cable extruding machine heat-insulation system of the present embodiment can save substantial amounts of energy resource consumption, and can improve production efficiency.
Additionally, the content according to table 1, it is possible to the shutdown time limit that PVC expects is set as 0.5 hour, the shutdown time limit that PP expects is set as 0.25 hour, the shutdown time limit of flame-proof material is set as 0.5 hour.For different materials, setting the different shutdown time limits, various extruded material all can reach to save the purpose of the energy by this extruding machine heat-insulation system.
Additionally, when extruding machine is switched to heated condition by keeping warm mode by temperature control unit, the time relay resets, prepare thus shutting down duration for record next time.
In addition, temperature control unit also has temp control switch, temperature control unit also has the temp control switch being turned on and off for controlling heater, described temp control switch has heating shelves, lock catch, die change shelves, start by switching gear or traction, control the heated condition of extruding machine.
When extruding machine starts under keeping warm mode, first by heating shelves, temp control switch being switched to lock catch or die change shelves, then switch back into heating shelves, extruding machine can enter heated condition.
Or, extruding machine can also launch into heated condition by traction.
In sum, the optical cable extruding machine heat-insulation system of the present invention achieves techniques below effect:
1) adopt this heat-insulation system, it is possible to be heated rapidly to production temperature, improve production efficiency.
2) this heat-insulation system is adopted, it is possible to prevent long-time heating infiltration to screw rod to the damage of screw rod and the extruded material of carbonization, thus extending the service life of screw rod.
3) this heat-insulation system is adopted, it is to avoid material carbonization is also adsorbed on screw rod, thus ensureing the extrusion molding effect of material.
4) this heat-insulation system is adopted, it is possible to effectively reduce heat time heating time more than 50%, it is possible to be effectively reduced electric energy loss.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (10)
1. an optical cable extruding machine heat-insulation system, including the time relay, temperature control unit, temperature sensing unit, wherein, temperature control unit also includes extruded material and determines that unit and extrusion temperature determine unit, and the time relay, temperature sensing unit connect respectively through circuit and temperature control unit, temperature sensing unit sends the temperature value measured in real time to temperature control unit
When extruding machine is shut down; the time relay starts record and shuts down duration; the shutdown time limit is exceeded when shutting down duration; the desired temperature of each warm area of extruding machine is switched to the drying temperature of extruded material by temperature control unit by the extrusion temperature of extruded material; after temperature is reduced to the drying temperature of extruded material, each warm area enters keeping warm mode；
When needs are started shooting, extruded material determines that unit knows the extruded material kind in extruding machine, and send a signal to extrusion temperature and determine unit, extrusion temperature determines that unit is according to material category, in conjunction with extrusion temperature parameter list, the desired temperature of each warm area is switched to by the drying temperature of extruded material the extrusion temperature of extruded material, when the temperature of each warm area reaches the extrusion temperature of extruded material, extruding machine possesses compressor start up condition
Wherein, the described shutdown time limit is that the heat-resisting fusion time according to different extruded material is determined.
2. optical cable extruding machine heat-insulation system according to claim 1; it is characterized in that; also include protected location; upon power-up; if the desired temperature of each warm area is not switched to extrusion temperature setting value by temperature control unit; then protected location temp. indicator control unit switches over, and forbids that extruding machine starts；
If the temperature of each warm area of extruding machine is not up to the extrusion temperature of extruded material, protected location also forbids that extruding machine starts.
3. optical cable extruding machine heat-insulation system according to claim 1, it is characterised in that when extruding machine is switched to heated condition by keeping warm mode by temperature control unit, the time relay resets.
4. optical cable extruding machine heat-insulation system according to claim 1, it is characterised in that PE material described shut down time be limited to 1.5 hours.
5. optical cable extruding machine heat-insulation system according to claim 1, it is characterised in that PVC material described shut down time be limited to 0.5 hour.
6. optical cable extruding machine heat-insulation system according to claim 1, it is characterised in that PP material described shut down time be limited to 0.25 hour
7. optical cable extruding machine heat-insulation system according to claim 1, it is characterised in that fire proofing described shut down time be limited to 0.5 hour.
8. optical cable extruding machine heat-insulation system according to claim 1, it is characterized in that, temperature control unit also has the temp control switch being turned on and off for controlling heater, described temp control switch has heating shelves, lock catch, die change shelves, start by switching gear or traction, control the heated condition of extruding machine.
9. optical cable extruding machine heat-insulation system according to claim 8, it is characterised in that when extruding machine starts under keeping warm mode, is first switched to lock catch or die change shelves by temp control switch by heating shelves, then switches back into heating shelves, and extruding machine enters heated condition.
10. optical cable extruding machine heat-insulation system according to claim 8, it is characterised in that extruding machine launches into heated condition by traction.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110456839A (en) * | 2019-08-27 | 2019-11-15 | 昌龙兴科技（深圳）有限公司 | A kind of intelligent temperature control system based on PID |
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| CN110456839A (en) * | 2019-08-27 | 2019-11-15 | 昌龙兴科技（深圳）有限公司 | A kind of intelligent temperature control system based on PID |
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