CN104441520A - Segmented induction heating thermostatic device of injection molding machine with function of deploying phase change heat storage material - Google Patents
Segmented induction heating thermostatic device of injection molding machine with function of deploying phase change heat storage material Download PDFInfo
- Publication number
- CN104441520A CN104441520A CN201410618395.1A CN201410618395A CN104441520A CN 104441520 A CN104441520 A CN 104441520A CN 201410618395 A CN201410618395 A CN 201410618395A CN 104441520 A CN104441520 A CN 104441520A
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- China
- Prior art keywords
- heat storage
- eddy
- phase change
- temperature
- change heat
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- 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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/58—Details
- B29C45/62—Barrels or cylinders
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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
- 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
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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
- 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
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of 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
- B29C2945/76003—Measured parameter
- B29C2945/7604—Temperature
Abstract
The invention discloses a segmented induction heating thermostatic device of an injection molding machine with a function of deploying a phase change heat storage material, and relates to an induction heating thermostatic device which is installed outside a charging barrel of the injection molding machine and is used for heating the charging barrel and plastics in the charging barrel in a segmented mode for the injection molding machine. The segmented induction heating thermostatic device comprises the charging barrel of the injection molding machine and a spray nozzle connected to the left end of the charging barrel, wherein the corresponding parts of the homogenizing section, the compression section and the charging section of the charging barrel are respectively provided with thermostatic induction heating parts and infrared temperature sensor components. The segmented induction heating thermostatic device has the effects of high-precision temperature control at the isothermal phase change temperature (namely the high-molecular material technological temperature), the maintaining of the high molecular material technological temperature in cooling a copper tube in power failure depending on the heat generated by phase change of 'a setting high-temperature composite phase change heat storage material', good homogenizing and mixing effects, high quality of injection molding elements, low energy consumption, and long service life of the copper tube in cooling the copper tube at a relatively low temperature.
Description
Technical field
The present invention relates to one and be arranged on injecting machine material tube outside, the plastics in barrel and barrel are carried out to the injection machine eddy-current heating thermostat of heat stepwise.
Background technology
Injection machine is a kind of widely used plastic processing machinery, but existing injection machine is produce heat by the resistance wire energising be wrapped in outside barrel substantially, and by the method that conduction is heated, is delivered to by heat on barrel, conducted heat by barrel again and make plastics melting in barrel, carry out injection mo(u)lding.This heat exchange pattern thermal losses is large, efficiency is low, preheating time is long; Resistance wire is in the long term high temperature state of oxidation, and service life is short, often changes trouble.
The patent No. 201110025615.6 patent discloses one ' induction heater for injection machine ', heater coil segmentation is around with at barrel, select different taps to change the coil turn of every section by change-over switch, regulate the voltage of every section of coil, realize every section of temperature adjustable.The one that patent discloses of the patent No. 2001320593287.4 ' adopts intermediate frequency series resonance induction heating energy saving device ' in injection machine, adopt Series-resonant Inverter, its output is connected with heating load electric current, its output is also connected with the input of frequency-tracking and current control unit, and frequency-tracking is connected with control and drive unit with the output of current control unit; This type of drive is compared with mode above, and temperature control precision is high, good energy-conserving effect, is convenient to automatic control.
But the eddy-current heating of above-mentioned injecting machine material tube, exists following defect: 1. temperature control precision is difficult to improve, especially for the material being difficult to dissolve each other, as the fusion of macromolecular material and inorganic matter, need to consider the creeping rate under accurate temperature, otherwise understand layering; 2. in, large-scale injection molding, large owing to adding heat, need the big current time of induction coil long, coil heating, easily to burn; 3. adopt water-cooling method, although coil can be changed into logical pure water in copper pipe, pipe, (for preventing fouling, cold in-water temperature is no more than 35 DEG C, and leaving water temperature should more than 60 DEG C; The pH value of water should in 5.6 ~ 8.5 scopes, hardness≤60 mg/L) cooling, reduce copper pipe temperature, thus not only pure water use cost is high, and in order to prevent electric leakage, after necessary power-off, ability water-cooled, have impact on injection machine productivity ratio; 4. adopt aerial cooler, need refrigeration system, same use cost is high.
Summary of the invention
The object of this invention is to provide a kind of injection machine segmentation eddy-current heating thermostat, this device is on the basis adopting eddy-current heating barrel, three sections to barrel difference in functionality are carried out temperature control heating separately, also make full use of " setting High-temperature composite phase-change heat storage " and heat barrel.Fed back by infrared temperature sensor, at beginning preheating or barrel temperature lower than when requiring, automatic eddy-current heating barrel and " setting High-temperature composite phase-change heat storage ".
The technical scheme realizing above-mentioned purpose is: the injection machine segmentation eddy-current heating thermostat of allotment phase change heat storage material, comprise the barrel of injection machine, barrel left end is connected with nozzle, described barrel is from left to right divided into homogenizing zone, compression section and feeding section successively, the correspondence position of the homogenizing zone of described barrel, compression section and feeding section is separately installed with constant temperature eddy-current heating parts and infrared temperature sensor parts, connects and removably connect integrally between all constant temperature eddy-current heating parts and infrared temperature sensor parts.
Homogenizing zone, the compression section of described barrel are identical with the structure of the constant temperature eddy-current heating parts that the correspondence position of feeding section is installed, comprise the first flange cylinder, the copper tube coil of annular is provided with in first flange cylinder, the ceramic vessel of inner circumferential opening is provided with in copper tube coil, setting High-temperature composite phase-change heat storage is filled with in ceramic vessel, and by the sealing of sealing soft copper ring, soft copper ring inwall is fitted with barrel and is contacted; Arrange respectively every magnetosphere between described copper tube coil and the first flange cylinder, ceramic vessel.
Homogenizing zone, the compression section of described barrel are identical with the infrared temperature sensor modular construction that the correspondence position of feeding section is installed, comprise the second flange cylinder, be provided with thermal insulation layer in described second flange cylinder, thermal insulation layer is provided with installation infrared temperature sensor in radial hole, radial hole.
Be bolted integrally between first flange cylinder of all constant temperature eddy-current heating parts and the second flange cylinder of infrared temperature sensor parts.
Described setting High-temperature composite phase-change heat storage is spliced ringwise by many lobes connector.
The present invention adopts on the basis of eddy-current heating barrel, and three sections to barrel difference in functionality are carried out temperature control heating separately, also makes full use of " setting High-temperature composite phase-change heat storage " and heats barrel.Fed back by infrared temperature sensor, at beginning preheating or barrel temperature lower than when requiring, automatic eddy-current heating barrel and " setting High-temperature composite phase-change heat storage "; " setting High-temperature composite phase-change heat storage " has suitable isothermal phase change temperature, high enthalpy of phase change, high-termal conductivity, the feature that Volume Changes is little, high-temperature stability is good; The isothermal phase change temperature of " setting High-temperature composite phase-change heat storage ", according to macromolecular material technological temperature characteristic, can be adapted to by formula allotment.Thus realize: the high accuracy temperature control 1. when isothermal phase change temperature (namely macromolecular material technological temperature), during 2. power-off cooling copper tube, by the heat that " setting High-temperature composite phase-change heat storage " phase transformation produces, maintains macromolecular material technological temperature; 3. thus make homogenizing, melting effect good, moulding quality is high; 4., during lower copper pipe temperature, cool, consume energy little, the copper pipe life-span is long.
Beneficial effect of the present invention:
(1) volume of the High-temperature composite phase-change heat storage that formalizes is comparatively large, thermal capacity is large, thermal inertia is large, thermal conductivity factor is high, use in phase transition temperature state, temperature substantially constant, thus ensure that the temperature of charge of injection overall process is constant, more ensure homogenizing, mixing effect, ensure the uniformity of product material, improve the quality of products.
(2) the constant temperature eddy-current heating parts on barrel feeding section, compression section and homogenizing zone control separately separately, and copper tube coil is respectively by power-off water cooling in turn, and the requirement of the cooling water of employing is low, cost is low, does not also have danger of hazardous electrical discharges.
(3) intermediate frequency power supply of the present invention adopts pulse density modulated (PDM) mode Modulating Power to export, respectively according to the rotating speed of feeding screw bolt motor and the feedback of respective infrared temperature sensor, control impuls is sent according to strategy by computer, control the heating of the copper tube coil of three eddy-current heating, real-time is good, temperature control precision is high.
(4) High-temperature composite phase-change heat storage that formalizes has the compensating action of induction heating power, can reduce the defect that induction heating power instantaneous power is inadequate.
(5) precision of infrared temperature sensor is high, strong interference immunity.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of constant temperature eddy-current heating parts;
Fig. 3 is the sectional view of Fig. 2;
Fig. 4 is the structural representation of infrared temperature sensor parts.
Detailed description of the invention
As shown in Figure 1, the present invention includes the barrel 1 of injection machine, barrel 1 left end is connected with nozzle 2, barrel 1 is from left to right divided into homogenizing zone 3, compression section 4 and feeding section 5 successively, and the correspondence position of the homogenizing zone 3 of barrel 1, compression section 4 and feeding section 5 is separately installed with constant temperature eddy-current heating parts 6 and infrared temperature sensor parts 7.
The homogenizing zone 3 of barrel 1, compression section 4 are identical with the structure of the constant temperature eddy-current heating parts 6 that the correspondence position of feeding section 5 is installed as shown in Figure 2,3, comprise the first flange cylinder 8, the copper tube coil 9 of annular is provided with in first flange cylinder 8, the ceramic vessel 10 of inner circumferential opening is provided with in copper tube coil 9, setting High-temperature composite phase-change heat storage 11 is filled with in ceramic vessel 10, and sealed by sealing soft copper ring 12, soft copper ring 12 inwall is fitted with barrel 1 and is contacted, and setting High-temperature composite phase-change heat storage 11 is spliced ringwise by many lobes connector 17; Arrange respectively every magnetosphere 13 between copper tube coil 9 and the first flange cylinder 8, ceramic vessel 10.
The high-temperature phase change heat accumulation material of setting High-temperature composite phase-change heat storage 11 is as the working media of accumulation of heat system, and its choose reasonable will finally determine energy-saving effect and the application prospect of phase-change material.Usually from the hot physical property of high-temperature phase change heat accumulation material, the aspect such as physical and chemical performance and economic performance, high-temperature phase change heat accumulation material is screened.
The high-temperature phase change heat accumulation material that the present invention selects is the NaCL-MgCL composite material of inorganic salts.Wherein, its phase transition temperature of composite material 50%NaCL-50%MgCL: 273 DEG C, ablation heat: 429kJ/kg, thermal conductivity factor: 0.96W/ (mK); Having the phase transition temperature, the absorption of latent heat of phase change and the release that adapt with engineering plastic PC technological temperature is carry out under the steady temperature of phase transformation, and this high-temperature phase change heat accumulation material had both had high ablation heat, can ensure temperature-resistant requirement, simultaneously again high thermal conductivity coefficient, meet the fast requirement of rate of heat exchange.
The different ratio of NaCL-MgCL composite material, has different phase transition temperatures, latent heat of phase change and thermal conductivity factor.The present invention not only according to several common plastics characteristic, but also the bringing-up section required according to its different temperatures, according to the NaCL-MgCL composite material of phase transition temperature allotment different ratio.Therefore, a kind of plastics, are just furnished with applicable feeding section constant temperature eddy-current heating parts, compression section constant temperature eddy-current heating parts and homogenizing zone constant temperature eddy-current heating parts; Different plastics can not be used with, and the different heating section of same plastics can not be used with.
The formalize preparation method of High-temperature composite phase-change heat storage 11 of the present invention adopts melting Infiltration Technics.First this technique adopt sintering process to prepare the porous matrix with three-dimensional networks structure, by the phase change material contacts of porous matrix and melting, the phase-change material of melting can be made to strengthen the wetability of matrix, then capillary force or ambient pressure is relied on to infiltrate in porous matrix high-temperature fusion phase-change material, thus obtained setting High-temperature composite phase-change heat storage 2g.
As shown in Figure 4, homogenizing zone 3, the compression section 4 of barrel 1 are identical with infrared temperature sensor parts 7 structure that the correspondence position of feeding section 5 is installed, comprise the second flange cylinder 14, be provided with thermal insulation layer 15 in second flange cylinder 14, thermal insulation layer 15 is provided with installation infrared temperature sensor 16 in radial hole, radial hole.
Entirety is connected into by bolt 18 between first flange cylinder 8 of constant temperature eddy-current heating parts 7 and the second flange cylinder 14 of infrared temperature sensor parts 7.
Operation principle of the present invention:
By the copper tube coil 9 of its eddy-current heating of water cooling in feeding section 5, compression section 4 and homogenizing zone 3 constant temperature eddy-current heating parts 6 one after the other power-off, constant temperature eddy-current heating parts 6 power process.Intermediate frequency power supply adopts pulse density modulated (PDM) mode Modulating Power to export, respectively according to the rotating speed (i.e. mass flow) of feeding screw bolt motor and the feedback of respective infrared temperature sensor 16, send control impuls by computer according to strategy, control the heating of the copper tube coil 9 of three eddy-current heating.
Claims (5)
1. allocate the injection machine segmentation eddy-current heating thermostat of phase change heat storage material, comprise the barrel of injection machine, barrel left end is connected with nozzle, it is characterized in that: described barrel is from left to right divided into homogenizing zone, compression section and feeding section successively, the correspondence position of the homogenizing zone of described barrel, compression section and feeding section is separately installed with constant temperature eddy-current heating parts and infrared temperature sensor parts, connects and removably connect integrally between all constant temperature eddy-current heating parts and infrared temperature sensor parts.
2. the injection machine segmentation eddy-current heating thermostat of allotment phase change heat storage material according to claim 1, it is characterized in that: homogenizing zone, the compression section of described barrel are identical with the structure of the constant temperature eddy-current heating parts that the correspondence position of feeding section is installed, comprise the first flange cylinder, the copper tube coil of annular is provided with in first flange cylinder, the ceramic vessel of inner circumferential opening is provided with in copper tube coil, setting High-temperature composite phase-change heat storage is filled with in ceramic vessel, and by the sealing of sealing soft copper ring, soft copper ring inwall is fitted with barrel and is contacted; Arrange respectively every magnetosphere between described copper tube coil and the first flange cylinder, ceramic vessel.
3. the injection machine segmentation eddy-current heating thermostat of allotment phase change heat storage material according to claim 2, it is characterized in that: homogenizing zone, the compression section of described barrel are identical with the infrared temperature sensor modular construction that the correspondence position of feeding section is installed, comprise the second flange cylinder, be provided with thermal insulation layer in described second flange cylinder, thermal insulation layer is provided with installation infrared temperature sensor in radial hole, radial hole.
4. the injection machine segmentation eddy-current heating thermostat of allotment phase change heat storage material according to claim 2, is characterized in that: be bolted integrally between the first flange cylinder of all constant temperature eddy-current heating parts and the second flange cylinder of infrared temperature sensor parts.
5. the injection machine segmentation eddy-current heating thermostat of allotment phase change heat storage material according to claim 2, is characterized in that: described setting High-temperature composite phase-change heat storage is spliced ringwise by many lobes connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410618395.1A CN104441520A (en) | 2014-11-06 | 2014-11-06 | Segmented induction heating thermostatic device of injection molding machine with function of deploying phase change heat storage material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410618395.1A CN104441520A (en) | 2014-11-06 | 2014-11-06 | Segmented induction heating thermostatic device of injection molding machine with function of deploying phase change heat storage material |
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| Publication Number | Publication Date |
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| CN104441520A true CN104441520A (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410618395.1A Pending CN104441520A (en) | 2014-11-06 | 2014-11-06 | Segmented induction heating thermostatic device of injection molding machine with function of deploying phase change heat storage material |
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| CN (1) | CN104441520A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104441565A (en) * | 2014-11-11 | 2015-03-25 | 常熟江辉纤维制品科技有限公司 | Induction heating thermostat for granulating extruder |
| CN107399062A (en) * | 2017-08-28 | 2017-11-28 | 进顺汽车零部件如皋有限公司 | A kind of injection machine barrel heat mechanism |
-
2014
- 2014-11-06 CN CN201410618395.1A patent/CN104441520A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104441565A (en) * | 2014-11-11 | 2015-03-25 | 常熟江辉纤维制品科技有限公司 | Induction heating thermostat for granulating extruder |
| CN107399062A (en) * | 2017-08-28 | 2017-11-28 | 进顺汽车零部件如皋有限公司 | A kind of injection machine barrel heat mechanism |
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Application publication date: 20150325 |