CN204209948U

CN204209948U - The plastic extruder of high-frequency electromagnetic heating

Info

Publication number: CN204209948U
Application number: CN201420573606.XU
Authority: CN
Inventors: 戴伟平
Original assignee: SHANGHAI LANYANG ELECTRIC Co Ltd
Current assignee: SHANGHAI LANYANG ELECTRIC Co Ltd
Priority date: 2014-09-30
Filing date: 2014-09-30
Publication date: 2015-03-18
Anticipated expiration: 2024-09-30

Abstract

The utility model relates to the plastic extruder of a kind of high-frequency electromagnetic heating, comprise plastic extruder, it is characterized in that: on the heating chamber of plastic extruder, electromagnetic heating system is installed, described electromagnetic heating system is made up of heater coil and electromagnetic controller, heater coil is loop coil, and heater coil ring set is contained in outside the heating cylinder of plastic extruder.The input termination industrial-frequency alternating current of electromagnetic controller, the output termination heater coil of electromagnetic controller.The utility model has the advantages that 95% of power consumption is converted into work heat energy, coil loss ≈ 2%, control unit loss ≈ 2%, the energy of 98% can be retained on barrel by insulated thermal insulating layer, eliminates the inertia phenomena of heating, and the cooling that heats up is efficient rapidly, heating is without dead angle, overall barrel homogeneous heating, solenoid remains on room temperature, therefore overlong service life.And can as the case may be at the heat-insulating heat-preserving material that barrel outer wrap is certain, so just greatly reduce scattering and disappearing of heat, improve the thermal efficiency, therefore power savings is very remarkable, can reach 40% ~ 65%.

Description

The plastic extruder of high-frequency electromagnetic heating

Technical field

The utility model relates to the plastic extruder of a kind of high-frequency electromagnetic heating.

Background technology

Plastic extruder is widely used in plastic products processing industry, and plastic raw materials (particle) is heated fusion in the cartridge heater of extruder, and the plastic grain after being heated is deadlock, is squeezed into mold cools down subsequently shaping.Current plastic grain heating is by electric heating coil, its principle relies on heating wire heating power, by contact conduction pattern, heat is passed on barrel, the heat only abutting against barrel inner side surface passes on barrel, by heat-conduction principle heating, plastic grain heating chamber is housed, plastic grain dissolves by heating chamber again, the heat major part in outside is lost in air, there is heat conduction loss, and cause environment temperature to rise, the shortcoming of electric-heating-wire-heating is the thermal efficiency low (usually about 50%), and thermal inertia is large, during consumption energy consumption.Resistant heating also has a shortcoming to be exactly that power density is low, just cannot adapt in some occasions needing temperature higher.Other shortcoming also has:

1, the 30-70% of power consumption is converted into work heat energy,

2, heating and cooling have inertia phenomena to produce, and the cooling that heats up is all slow,

3, heating has dead angle, can not be wrapped in barrel skin completely,

4, heating collar loss is large, and the life-span is short.

Therefore urgently the heating arrangement of existing plastic extruder is improved.

Summary of the invention

The purpose of this utility model solves plastic extruder in prior art to adopt the problems referred to above existing for heating wire heating power, provides the plastic extruder that a kind of high-frequency electromagnetic heats.The utility model designs the plastic extruder of a kind of high-frequency electromagnetic heating, comprise the heating cylinder of plastic extruder, screw rod, die head, it is characterized in that: on the heating cylinder of plastic extruder, electromagnetic heating system is installed, described electromagnetic heating system is made up of heater coil and electromagnetic controller, heater coil is loop coil, and heater coil ring set is contained in outside the cartridge heater of plastic extruder.The input termination industrial-frequency alternating current of electromagnetic controller, the output termination heater coil of electromagnetic controller.One deck insulating is had on outside the cartridge heater of plastic extruder.The utility model has the advantages that 95% of power consumption is converted into work heat energy, coil loss ≈ 2%, control unit loss ≈ 2%, the energy of 98% can be retained on barrel by insulated thermal insulating layer, eliminates the inertia phenomena of heating, and the cooling that heats up is efficient rapidly, heating is without dead angle, overall barrel homogeneous heating, solenoid remains on room temperature, therefore overlong service life.And can as the case may be at the heat-insulating heat-preserving material that barrel outer wrap is certain, so just greatly reduce scattering and disappearing of heat, improve the thermal efficiency, therefore power savings is very remarkable, can reach 40% ~ 65%.

Accompanying drawing explanation

Accompanying drawing 1 is structural representation of the present utility model.

Detailed description of the invention

The plastic extruder of a kind of high-frequency electromagnetic heating in figure, comprise the heating cylinder 1 of plastic extruder, screw rod 2, die head 3, it is characterized in that: on the heating cylinder of plastic extruder, electromagnetic heating system is installed, described electromagnetic heating system is made up of heater coil 4 and electromagnetic controller 5, heater coil is loop coil, and heater coil ring set is contained in outside the cartridge heater of plastic extruder.The input 6 of electromagnetic controller connects industrial-frequency alternating current 7, and the output 8 of electromagnetic controller connects heater coil.One deck insulating 9 is had on outside the cartridge heater of plastic extruder.

For the how inefficient drawback of current extruder heating process power consumption, the eddy-current heating principle adopting high frequency electric to produce heats, its structure is the high frequency waves that high-power high-frequency clapp oscillator produces 15-30KHz, high frequency electric receives annular coil, annular coil is wrapped in the heating cylinder that plastic grain is housed, heating cylinder is that ferrous materials is made, when high frequency electric is by coil, the electromagnetic wave of the higher-order of oscillation produces eddy current to iron heating cylinder, thus the heating cylinder that adds of dress plastic grain generates heat, plastic grain melts by the heating cylinder of heating.Can temperature probe 10 be set on heating cylinder, then controls the output of electromagnetic controller according to temperature probe and temperature controller 11, to control heating-up temperature.

Electromagnetic heating technique makes metal barrel self-heating, and as the case may be at the heat-insulating heat-preserving material that heating cylinder outer wrap is certain, so just can greatly reduce scattering and disappearing of heat, improve the thermal efficiency, therefore power savings is very remarkable, can reach 40% ~ 65%.(relatively different raw materials, different equipment, power savings is different)

Electromagnetic heating system is made up of two parts: electromagnetic controller and heater coil.Electromagnetic Heating is a kind of device utilizing electromagnetic induction principle to convert electrical energy into heat energy.Former machine by temperature controlled power supply through electromagnetic controller by industrial frequency AC electric rectification, filtering, be reverse into the high-frequency alternating current of 15-30KHZ, receive in electromagnetic heating coil by connecting line, the high frequency electric of change flows through the alternating magnetic field that coil can produce change at a high speed at a high speed, when the magnetic line of force in magnetic field by producing countless little eddy current during magnetic conductive metal material in metallic object, make metal material heating at a high speed voluntarily itself, thus reach the object of raw material in heating of metal barrel.

Current product is mainly intelligent high-efficient energy-saving electromagnetic heating system; there is energy-efficient, easy for installation, use safety, non-maintaining, free of contamination advantage; as the best substitute of traditional electrical hot product, product is in plastic machine (as: in the reducing energy consumption of injection machine, extruder, comminutor, inflation film manufacturing machine, wire drawing machine etc.), Crude Oil Transportation, food machinery, medication chemistry machinery and other similar heating industry extensive uses.

Design on control circuit overtension is too low, and electric current is excessive, and temperature is too high, electromagnetism superposition decay, the multiple protection such as electromagnetic interference.Possesses the auto restore facility (i.e. autoboot) after fault eliminating.And devise fault-signal output circuit, after display decoder process, demonstrate failure code, make maintenance more convenient.Integrated due to interiors of products, has volume little easy for installation, the advantages such as failure rate is low.

This product maintains the leading position in current energy-saving electric heater product.Digital intelligent full-bridge electromagnetic heating system, the thermal efficiency is up to more than 95%, ratio resistance formula heating economize on electricity more than 60% under equal conditions, preheating time shortens 2/3, thus saved a large amount of electric energy, greatly reduce producing cost, reduce production cost, improve the competitiveness of product, for enterprise brings huge economic benefit.

The contrast of heating wire and Electromagnetic Heating:

Claims

1. the plastic extruder of a high-frequency electromagnetic heating, comprise the heating cylinder of plastic extruder, screw rod, die head, it is characterized in that: on the heating cylinder of plastic extruder, electromagnetic heating system is installed, described electromagnetic heating system is made up of heater coil and electromagnetic controller, heater coil is loop coil, and heater coil ring set is contained in outside the cartridge heater of plastic extruder.

2., by the plastic extruder of a kind of high-frequency electromagnetic heating according to claim 1, it is characterized in that: the input termination industrial-frequency alternating current of electromagnetic controller, the output termination heater coil of electromagnetic controller.

3., by the plastic extruder of a kind of high-frequency electromagnetic heating according to claim 1, it is characterized in that: on outside the cartridge heater of plastic extruder, have one deck insulating.