WO2009071003A1 - Procédé de chauffage pour cylindre de machine de traitement de plastique et son dispositif - Google Patents

Procédé de chauffage pour cylindre de machine de traitement de plastique et son dispositif Download PDF

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Publication number
WO2009071003A1
WO2009071003A1 PCT/CN2008/072713 CN2008072713W WO2009071003A1 WO 2009071003 A1 WO2009071003 A1 WO 2009071003A1 CN 2008072713 W CN2008072713 W CN 2008072713W WO 2009071003 A1 WO2009071003 A1 WO 2009071003A1
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WIPO (PCT)
Prior art keywords
heating
plastic processing
pipe
flow rate
pump
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Application number
PCT/CN2008/072713
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English (en)
French (fr)
Inventor
Chih-Shiang Han
Original Assignee
Lu, Hsaio-Ting
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Filing date
Publication date
Application filed by Lu, Hsaio-Ting filed Critical Lu, Hsaio-Ting
Publication of WO2009071003A1 publication Critical patent/WO2009071003A1/zh

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Classifications

    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/74—Heating or cooling of the injection unit
    • 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
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/83—Heating or cooling the cylinders
    • 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
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/83—Heating or cooling the cylinders
    • B29C48/832—Heating
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76003—Measured parameter
    • B29C2945/7604—Temperature
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76177—Location of measurement
    • B29C2945/7618—Injection unit
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76655—Location of control
    • B29C2945/76775—Fluids
    • B29C2945/76782—Fluids temperature control fluids
    • 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
    • B29C2948/9258—Velocity
    • B29C2948/926—Flow or feed rate
    • 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
    • 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
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895—Barrel or housing
    • 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
    • B29C2948/92819—Location or phase of control
    • B29C2948/92952—Drive section, e.g. gearbox, motor or drive fluids
    • 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
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/68—Barrels or cylinders

Definitions

  • the invention relates to a heating method and a device for a material pipe of a plastic processing equipment, and the plastic processing equipment refers to an injection molding machine, an extruder, a blow molding machine and the like.
  • the heating method of the existing plastic processing equipment is electric heating, and a plurality of electric heating rings and temperature sensors are arranged on the material pipe, and the output of the temperature sensor is connected to the microprocessor, and the temperature value of each heating ring is pre-stored in the microprocessor.
  • the microprocessor issues an instruction to adjust the current of the electric heating ring.
  • the method is characterized by the use of electric heating, but as energy continues to be tight, electricity prices are rising, bringing processing costs up. From the perspective of energy conversion, it is wasteful to use electricity as heating. First, it uses a fuel such as heavy oil to generate electricity, which is transmitted through the grid and then used for heating. This power generation and transmission process is accompanied by huge energy loss. As energy conservation and emission reduction become social welfare, it is necessary to find new and more energy-saving solutions for heating methods and equipment for plastic processing equipment.
  • the invention solves the defects of waste material energy and high cost of the heating method and equipment of the material processing tube of the existing plastic processing equipment, and provides a heating method and equipment for the material processing tube of the plastic processing equipment with good energy saving effect and low use cost.
  • the heating method of the material tube of the plastic processing equipment of the present invention comprises the following process steps:
  • a heating ring and a temperature sensor are arranged axially on the material pipe of the plastic processing equipment;
  • the central processor sends an adjustment command to the flow control device disposed on the fuel inlet pipe of the heating furnace or the flow control device on the medium conveying pipe according to the comparison result of the input value of the temperature sensor with the predetermined value, and changes the heating The heat supply to the ring maintains the temperature of the heating ring at a set value.
  • the heating device for the material processing tube of the plastic processing device used in the heating method of the plastic processing device of the present invention is characterized in that: the heating ring and the temperature sensor are arranged axially on the material tube of the plastic processing equipment.
  • the temperature sensor is connected to the central processing unit, and the central processor prestores a predetermined temperature value of each heating ring, and the inner cavity of the heating ring is connected to the heating tube through the medium conveying tube, the heating tube is disposed on the combustion heating furnace, and the conveying tube is disposed on the medium conveying tube
  • the flow control device of the fuel inlet pipe of the heating furnace or the flow controller of the transfer pump is electrically connected to the output of the central processor.
  • the flow control device is a flow proportional solenoid valve, or a variable pump with a controller, or Is a fixed pump with a servo motor, or It is a fixed pump with a frequency converter.
  • the conveying pump is a fixed pump, the flow controller is a frequency converter; or, the conveying
  • the pump is a variable pump, the flow controller is a controller on the variable pump; or the pump is a fixed pump, the flow controller is a servo motor on the fixed pump; or
  • the flow controller is a proportional solenoid valve.
  • the heating in the furnace heats the medium in the heating tube, and the medium is delivered to the inner cavity of the heating ring.
  • the heating ring heats the tube.
  • the heating temperature is controlled by controlling the fuel flow rate of the heating furnace or controlling the flow rate of the medium delivery pipe.
  • the invention has the advantages of directly using the fuel heating pipe, saving energy consumption and reducing the cost.
  • Figure 1 is a schematic diagram of the present invention
  • Figure 2 is a cross-sectional view of the heating ring
  • the heating method of the material tube of the plastic processing equipment of the present invention comprises the following process steps: 1) A heating ring and a temperature sensor are arranged axially on the material pipe of the plastic processing equipment;
  • the central processor sends an adjustment command to the flow control device disposed on the fuel inlet pipe of the heating furnace or the flow control device on the medium conveying pipe according to the comparison result of the input value of the temperature sensor with the predetermined value, and changes the heating The heat supply to the ring maintains the temperature of the heating ring at a set value.
  • the heating device of the material processing tube of the plastic processing equipment used according to the heating method of the material processing tube of the above plastic processing equipment comprises a heating ring 3 and a temperature sensor 4 disposed axially on the material pipe 11 of the plastic processing equipment, and the temperature sensor 4 Connected to the central processing unit 10, the central processor 10 prestores a predetermined temperature value of each heating ring, and the inner cavity of the heating ring 3 is connected to the heating pipe 7 through the medium conveying pipe 5, and the heating pipe 7 is disposed on the combustion heating furnace 8, and the medium is conveyed.
  • a transfer pump 6 is disposed on the tube 5; a flow control device 9 is mounted on the fuel inlet pipe of the heating furnace 8, and the flow control device 9 is electrically connected to the output end of the central processing unit 10.
  • the flow control device 9 is a flow proportional solenoid valve.
  • the central processing unit 10 is a computer or a microprocessor.
  • the front end of the tube 11 is provided with a nozzle 1 and a tube head 2, and a rear end is provided with an injection cylinder 12.
  • the invention burns and heats the medium in the heating tube during the use of the heating furnace, the medium Embodiment 2
  • the present embodiment differs from the first embodiment in that the flow control device 9 is provided with a variable pump of a controller, and the controller is electrically connected to the output of the central processing unit 10. The rest are the same.
  • variable pump inner swash plate is regulated by the controller and can be swung to change the output flow rate and pressure. Since the variable pump is a common device, its structure will not be described again.
  • This embodiment differs from the first embodiment in that the flow control device 9 is a fixed pump with a servo motor that is electrically connected to the output of the central processing unit 10. The rest are the same.
  • a fixed pump is a general pump with a constant output flow relative to a variable pump.
  • the servo motor changes the rotational speed according to the command of the central processing unit 10 to adjust the flow rate.
  • the flow control device 9 is a fixed pump with a frequency converter, and the frequency converter is electrically connected to the output end of the central processing unit 10.
  • the difference between this embodiment is that the flow rate of the heating medium is adjusted by controlling the flow rate of the medium conveying pipe.
  • the output signal of the central controller 10 is no longer connected to the flow control device of the fuel inlet pipe of the furnace, but to the flow controller of the transfer pump 6 on the medium delivery pipe 5.
  • the conveying pump is a fixed pump
  • the flow controller is a frequency converter.
  • the frequency converter changes the speed according to the command of the central processing unit 10 to adjust the flow rate.
  • the difference between this embodiment and the fifth embodiment is that the transfer pump is a variable pump, and the quantity controller is a controller on the variable pump.
  • the controller swings the swash plate in the variable pump according to the instruction of the central processing unit 10 to output flow rate and pressure.
  • the difference between this embodiment and the fifth embodiment is that the transfer pump is a fixed pump, and the flow controller is a servo motor on the fixed pump.
  • the servo motor changes the rotational speed according to the command of the central processor 10 to adjust the flow rate of the pump.
  • the flow controller is a proportional solenoid valve.
  • the rest is the same as in the fifth embodiment.
  • the content described in the embodiments of the present specification is merely an enumeration of the implementation forms of the inventive concept, and the scope of the present invention should not be construed as being limited to the specific forms stated in the embodiments, and the scope of the present invention is also in the field. Equivalent technical means that a skilled person can conceive according to the inventive concept.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)

Description

说 明 书
塑料加工设备的料管加热方法及装置
(一） 技术领域
本发明涉及一种塑料加工设备的料管的加热方法和设备， 塑料 加工设备是指注塑机、 挤塑机、 吹塑机等。
(二） 背景技术
现有的塑料加工设备的加热方法是电加热， 在料管上排列一些 列电加热环和温度传感器， 温度传感器的输出连接微处理器， 微处 理器中预存有各加热环的温度值， 当温度传感器测量的电加热环的 温度偏离预存值时， 微处理器发出指令调整电加热环的电流。该方法 的特点是使用电加热， 但是随着能源持续紧张， 电价日益升高， 带 来加工成本上升。处能源转化的角度看， 将电作为加热使用是很浪费 的， 首先用重油等燃料发电， 经电网传输， 再用于加热， 该发电和 传输过程伴随着巨大的能量损耗。随着节能减排成为社会公益， 有必 要为塑料加工设备的加热方法和设备寻找新的更加节能的方案。
(三） 发明内容
本发明要解决现有塑料加工设备的料管的加热方法和设备浪费 能源、成本高的缺点， 提供一种节能效果好、使用成本低的塑料加工 设备的料管的加热方法和设备。 本发明所述的塑料加工设备的料管的加热方法， 包括如下工艺 歩骤：
1) 在塑料加工设备的料管上沿轴向设置加热环和温度传感器；
2) 在中央处理器中设置各加热环的温度预定值， 测量各加热环 的温度， 并将温度值传输到中央处理器；
3) 将加热管设置在燃烧加热炉上加热；
4) 将加热管内的热介质通过介质输送管输送到加热环的内腔， 再回流到加热管内；
5) 中央处理器根据温度传感器的输入值与预定值对照结果， 向 设置在加热炉的燃料输入管上的流量控制装置或所述的介质 输送管上的流量控制装器发出调整指令， 改变加热环的供热 量， 使加热环的温度维持在设定值。
本发明所述的塑料加工设备的料管的加热方法所采用的塑料加 工设备的料管的加热设备， 其特征在于： 包括在塑料加工设备的料 管上沿轴向设置的加热环和温度传感器， 温度传感器连接中央处理 器， 中央处理器中预存有各加热环的温度预定值， 加热环的内腔通 过介质输送管连接加热管， 加热管设置在燃烧加热炉上， 介质输送 管上设置输送泵； 加热炉的燃料输入管的流量控制装置或所述输送 泵的流量控制器与中央处理器的输出端电连接。
当采用控制加热炉的燃料输入管的流量来调节加热环的温度时， 可以采用如下方式之一： 所述的流量控制装置是流量比例电磁阀， 或者是带有控制器的可变泵， 或者是带有伺服电机的固定泵， 或者 是带有变频器的固定泵。
或者， 当采用控制介质输送管的流量来调节加热环的温度时， 可以采用下列方式之一： 所述的输送泵是固定泵， 所述的流量控制 器是变频器； 或者， 所述的输送泵是可变泵， 所述的流量控制器是 可变泵上的控制器； 或者， 所述的输送泵是固定泵， 所述的流量控 制器是该固定泵上的伺服电机； 或者所述的流量控制器是比例电磁 阀。
本发明在使用过程中加热炉燃烧加热了加热管内的介质， 介质 被输送到加热环内腔。如此， 加热环加热料管。加热温度的控制采用 控制加热炉的燃料流量或控制介质输送管的流量的方式进行。
本发明的优点是直接使用燃料加热料管， 节省了能耗， 降低了 成本。
(四） 附图说明
图 1是本发明的原理图
图 2是加热环的剖试图
(五） 具体实施方式
实施例一
参照附图 1、 2：
本发明所述的塑料加工设备的料管的加热方法， 包括如下工艺 歩骤： 1) 在塑料加工设备的料管上沿轴向设置加热环和温度传感器；
2) 在中央处理器中设置各加热环的温度预定值， 测量各加热环 的温度， 并将温度值传输到中央处理器；
3) 将加热管设置在燃烧加热炉上加热；
4) 将加热管内的热介质通过介质输送管输送到加热环的内腔， 再回流到加热管内；
5) 中央处理器根据温度传感器的输入值与预定值对照结果， 向 设置在加热炉的燃料输入管上的流量控制装置或所述的介质 输送管上的流量控制装器发出调整指令， 改变加热环的供热 量， 使加热环的温度维持在设定值。 根据以上塑料加工设备的料管的加热方法所采用的塑料加工设 备的料管的加热设备， 包括在塑料加工设备的料管 11上沿轴向设置 的加热环 3和温度传感器 4， 温度传感器 4连接中央处理器 10， 中 央处理器 10中预存有各加热环的温度预定值， 加热环 3的内腔通过 介质输送管 5连接加热管 7， 加热管 7设置在燃烧加热炉 8上， 介质 输送管 5上设置输送泵 6; 加热炉 8的燃料输入管上装有流量控制装 置 9， 流量控制装置 9与中央处理器 10的输出端电连接。
所述的流量控制装置 9是流量比例电磁阀。所述的中央处理器 10 是电脑或微处理器。
料管 11前端装有射嘴 1和料管头 2， 后端装有射出缸 12。
本发明在使用过程中加热炉燃烧加热了加热管内的介质， 介质 实施例二
参照附图 1、 2：
本实施例与实施例一相比， 其区别是流量控制装置 9带有控制 器的可变泵， 所述控制器与中央处理器 10的输出端电连接。 其余相 同。
所述的可变泵内斜板受所述的控制器调节， 可以摆动， 可以改 变输出流量和压力。 由于可变泵是常见设备， 其结构不再赘述。 实施例三
参照附图 1、 2：
本实施例与实施例一相比， 其区别是流量控制装置 9是带有伺 服电机的固定泵， 所述伺服电机与中央处理器 10的输出端电连接。 其余相同。 固定泵是与可变泵相对而言的输出流量不变的一般的泵。
所述的伺服电机根据中央处理器 10的指令改变转速， 调节流量。 实施例四
参照附图 1、 2：
本实施例与实施例一相比， 其区别是流量控制装置 9是带有变 频器的固定泵， 所述变频器与中央处理器 10的输出端电连接。 其余 实施例五
参照附图 1、 2：
本实施例与实施例一相比， 其区别是采用控制介质输送管的流 量来调节加热环的温度。 中央控制器 10的输出信号不再与加热炉的 燃料输入管的流量控制装置连接， 而是与介质输送管 5上的输送泵 6 的流量控制器连接。
当采用控制介质输送管的流量来调节加热环的温度时， 可以采 用下列方式： 所述的输送泵是固定泵， 所述的流量控制器是变频器。 所述的变频器根据中央处理器 10的指令改变转速， 调节流量。 实施例六
参照附图 1、 2：
本实施例与实施例五的区别在于所述的输送泵是可变泵， 所述 量控制器是可变泵上的控制器。
所述的控制器根据中央处理器 10的指令摆动可变泵内的斜板， 输出流量和压力。
其余与实施例五相同。 实施例七 参照附图 1、 2：
本实施例与实施例五的区别在于所述的输送泵是固定泵， 所述 的流量控制器是该固定泵上的伺服电机。所述的伺服电机根据中央处 理器 10的指令改变转速， 调整泵的流量。
其余与实施例五相同。 实施例八
参照附图 1、 2：
本实施例与实施例五的区别在于所述的流量控制器是比例电磁 阀。 其余与实施例五相同。 本说明书实施例所述的内容仅仅是对发明构思的实现形式的列 举， 本发明的保护范围的不应当被视为仅限于实施例所陈述的具体 形式， 本发明的保护范围也及于本领域技术人员根据本发明构思所 能够想到的等同技术手段。

Claims

权 利 要 求 书
1、 塑料加工设备的料管的加热方法， 包括如下工艺歩骤：
1) 在塑料加工设备的料管上沿轴向设置加热环和温度传感器；
2) 在中央处理器中设置各加热环的温度预定值， 测量各加热环 的温度， 并将温度值传输到中央处理器；
3) 将加热管设置在燃烧加热炉上加热；
4) 将加热管内的热介质通过介质输送管输送到加热环的内腔， 再回流到加热管内；
5) 中央处理器根据温度传感器的输入值与预定值对照结果， 向 设置在加热炉的燃料输入管上的流量控制装置或所述的介质 输送管上的流量控制装器发出调整指令， 改变加热环的供热 量， 使加热环的温度维持在设定值。
2、 根据权利要求 1所述的塑料加工设备的料管的加热方法所采 用的塑料加工设备的料管的加热设备， 其特征在于： 包括在塑料加 工设备的料管上沿轴向设置的加热环和温度传感器， 温度传感器连 接中央处理器， 中央处理器中预存有各加热环的温度预定值， 加热 环的内腔通过介质输送管连接加热管， 加热管设置在燃烧加热炉上， 介质输送管上设置输送泵； 加热炉的燃料输入管的流量控制装置或 所述输送泵的流量控制器与中央处理器的输出端电连接。
3、 根据权利要求 2所述的塑料加工设备的料管的加热设备， 其 特征在于： 所述的流量控制装置是流量比例电磁阀。
4、 根据权利要求 2所述的塑料加工设备的料管的加热设备， 其 特征在于： 所述的流量控制装置是带有控制器的可变泵。
5、 根据权利要求 2所述的塑料加工设备的料管的加热设备， 其 特征在于： 所述的流量控制装置是带有伺服电机的固定泵。
6、 根据权利要求 2所述的塑料加工设备的料管的加热设备， 其 特征在于： 所述的流量控制装置是带有变频器的固定泵。
7、 根据权利要求 2所述的塑料加工设备的料管的加热设备， 其 特征在于： 所述的输送泵是固定泵， 所述的流量控制器是变频器。
8、 根据权利要求 2所述的塑料加工设备的料管的加热设备， 其 特征在于： 所述的输送泵是可变泵， 所述的流量控制器是可变泵上 的控制器。
9、 根据权利要求 2所述的塑料加工设备的料管的加热设备， 其 特征在于： 所述的输送泵是固定泵， 所述的流量控制器是该固定泵 上的伺服电机。
10、根据权利要求 2所述的塑料加工设备的料管的加热设备， 其 特征在于： 所述的流量控制装器是流量比例电磁阀。
PCT/CN2008/072713 2007-12-07 2008-10-16 Procédé de chauffage pour cylindre de machine de traitement de plastique et son dispositif WO2009071003A1 (fr)

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