CN105404329A - Method and device for regulating temperature of molding die - Google Patents

Method and device for regulating temperature of molding die Download PDF

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Publication number
CN105404329A
CN105404329A CN201510915767.1A CN201510915767A CN105404329A CN 105404329 A CN105404329 A CN 105404329A CN 201510915767 A CN201510915767 A CN 201510915767A CN 105404329 A CN105404329 A CN 105404329A
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China
Prior art keywords
parameter
temperature
temperature adjustment
mould
signal
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CN201510915767.1A
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CN105404329B (en
Inventor
F·拉施克
J·吉绍夫
G·皮尔韦恩
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Engel Austria GmbH
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Engel Austria GmbH
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00Moulds or cores; Details thereof or accessories therefor
    • B29C33/02Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/04Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/72Heating or cooling
    • B29C45/73Heating or cooling of the mould
    • B29C45/7306Control circuits therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/007Tempering units for temperature control of moulds or cores, e.g. comprising heat exchangers, controlled valves, temperature-controlled circuits for fluids
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/0288Controlling heating or curing of polymers during moulding, e.g. by measuring temperatures or properties of the polymer and regulating the process
    • B29C35/0294Controlling heating or curing of polymers during moulding, e.g. by measuring temperatures or properties of the polymer and regulating the process using tempering units for temperature control of moulds or cores
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/72Heating or cooling
    • B29C45/73Heating or cooling of the mould
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, controlling or regulating
    • B29C45/78Measuring, controlling or regulating of temperature

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

The invention relates to a device for regulating the temperature of a molding die (3). The device is provided with at least one signal input end (15), and can enable at least one parameter signal to be inputted into a processor through the signal input end (15). The device is characterized in that the processor is constructed into a processor which can calculate a characteristic parameter through at least one temperature regulating parameter when the molding die (3) arrives at a basically stable state, and enables the characteristic parameter to be transmitted to an output apparatus (6). The temperature regulating parameter is at least one parameter signal or a parameter deduced from at least one parameter signal. The output apparatus (6) is suitable for outputting the characteristic parameter to an operator and/or a machine tool control apparatus. The invention also relates to temperature regulating equipment, a molding machine, and a method for regulating the temperature of the molding die (3).

Description

For carrying out the method and apparatus of temperature adjustment to mould
Technical field
The present invention relates to and a kind of there is the register of the technical characteristic as described in the preamble of claim 1 and a kind of method with the technical characteristic as described in the preamble of claim 17.
Background technology
Next prior art is illustrated by means of the mould of injection machine.But similar content is equally applicable to the mould in punching press, die casting etc.
For the quantity of sintered parts of the profiled member made by means of injection machine, mould be especially particularly important in the temperature at mold cavity surface place.If too low in this temperature, the excessively rapid hardening of fused mass when entering into forming recess can cause particularly in the defect at surface of shaped parts place.
In order to avoid this point, in the prior art temperature adjustment is carried out to mould.This is such as illustrated in DE102005019890B3.Temperature control medium is transferred by least one the temperature adjustment passage in mould, reaches acceptable temperature to make mould.
Usually, in mould, be provided with multiple temperature adjustment passage, these temperature adjustment passages are supplied by a common influent stream.In this preferred a kind of following scheme, that is, the temperature control medium stream in influent stream is branched and each subflow is supplied to a temperature adjustment passage respectively.After each temperature adjustment passage, each subflow collects in again in a common backflow.
In the so-called tempered water divider that the branch of the subflow of temperature control medium and collecting usually occurs on forming machine.The explanation of this tempered water divider can DE102012013643A1, DE8802462U1 or DE20304841U1 of REFERENCE TO RELATED people.
In the prior art it is also known that: the input controlling or regulate temperature control medium.For this reason, tempered water divider can be equipped with different sensors, as temperature sensor and volume flow sensor, the measured value of these sensors is used as the basis controlling and regulate.This control or adjustment are integrated in the machine control unit of forming machine usually.
But outside temperature equipment in addition known equally, this outside temperature equipment and forming machine are independently for controlling or be adjusted to the temperature adjustment of mould.
The heating of mould is a process slowly.Heat time from a few minutes of mould are until a few hours.
In order to quantity of sintered parts and technology stability, mould should be heated before the start of production as well as possible.But, consider efficiency and high mould availability, unnecessary long mould should be avoided to heat completely.
For this reason, it is known in the art that directly measure the temperature of mold cavity surface in a mold.If this temperature is too low, can postpones and produce start time or be substandard products by Manufactured profiled member automatic discrimination.
The method has following shortcoming, that is, the temperature sensor for directly measuring mold cavity surface temperature is not configured in mould in usual mode, because these temperature sensors are with high costs.
It is also possible that simulate the enthusiasm condition when temperature adjustment starts in mould and around it, and determine from this emulation to the duration that mould is heated completely.
Certainly, all must consistent with the boundary condition of emulation (initial temperature of mould, (constant/fluctuate) medium temperature, environment temperature) at these all boundary conditions in heating process, thus, the applicability in concrete condition is impaired.In addition, at this disadvantageously, this kind of simulation is when complicated.
In addition it is known that, especially, time aborning disconnected, on parts, (such as: during the demoulding or after demolding immediately) performs temperature survey or is specified to the thermal equilibrium of shaped piece by means of infrared sensor (such as: thermal imaging system).
But this is retouched, and to execute be very with high costs.In addition, the method operation is in practice always not simple.
Summary of the invention
Task of the present invention is to provide a kind of for register and a kind of method for carrying out temperature adjustment to mould, and it allows to be specified to mould heating completely when producing beginning and/or when breaking aborning simplifiedly compared to prior art.
This task is by having the register of the technical characteristic of claim 1 and being resolved by the method for the technical characteristic with claim 17.
This realizes in the following manner, namely, the processor of register is configured for calculating the characteristic parameter for the elementary heat steady state (SS) reaching mould by least one temperature adjustment parameter and being sent to output unit, described temperature adjustment parameter is at least one parameter signal inputted or the parameter derived by described parameter signal, and described output unit is applicable to characteristic parameter exported to operator and/or export to machine control unit.
The each parameter person obtained by original parameter (such as at least one parameter signal described) by arithmetical operation, integration, derivative, use function etc. can be used as the parameter derived.
Described thermal steady state is shown by the stationary temperature substantially in time of mould.And it should be noted at this, should not be considered on the impact of producing, because such as fused mass can affect the thermal equilibrium of mould certainly to the cooling of the introducing in forming recess and fused mass then.When produce start, such as can be used in average in the one-period time after the constant of parameter (especially temperature difference) as the standard of elementary heat steady state (SS).The temperature of the particular point in time such as in the production cycle or the constant of temperature difference within multiple cycle can be used as the standard of thermal steady state equally.
Characteristic parameter is exported to this process of operator can carry out by different way.Except directly, visually, digitally provide the elementary heat steady state (SS) reaching mould time point or until reach mould the duration of elementary heat steady state (SS) except, such as can arrange like this, that is: use the signal lamp or analog that represent certain residue duration.
Only can export following information in the simplest situations to operator, that is: whether elementary heat steady state (SS) reaches (excess time 0).This point also can be used in production period, so that monitoring does not exist less desirable heat affecting, and these heat affectings may disturb the elementary heat steady state (SS) in mould.
Described characteristic parameter is exportable equally gives machine control unit, and this machine control unit causes the respective action of forming machine (such as produce and start to start or wait).
Described register accessible site is in machine control unit.
By the present invention, mould can be estimated in a straightforward manner by the time of well heating completely.This contributes to minimizing substandard products number.
Water (may with additive) can be used as temperature control medium.And also can consider with the temperature adjustment that oil or analog carry out.
Advantageous forms of implementation of the present invention limits in the dependent claims.
Can preferably arrange like this, that is: the heat that at least one temperature adjustment parameter described is at least one temperature difference, at least one is discharged, at least one heating power or the parameter derived by these parameters.This kind of parameter is applicable to the thermal equilibrium being detected as mould well.
Can preferably arrange like this, that is: described register can be connected with at least one temperature sensor by means of described at least one signal input, and wherein, at least one measured temperature recorded by means of at least one temperature sensor described is parameter signal.
In addition preferably can arrange like this, that is: use at least two temperature sensors.Especially, when these two temperature sensors be arranged so that its preferably independent provide a temperature in influent stream and one in backflow for each temperature adjustment passage temperature time, can obtain temperature difference thus, this makes the heat calculating discharge relatively accurately become possibility.The pin-point accuracy when calculating characteristic parameter can be realized thus.
But other form of implementation also can be considered.If such as consider that the temperature of the temperature control medium in influent stream is constant, then can use less temperature sensor (such as each temperature adjustment passage has a temperature sensor respectively in backflow).
Especially when for calculate characteristic parameter, the temperature difference of influent stream temperature and reflux temperature available time, additionally use the measured value of volume flow sensor can be favourable.Determine temperature adjustment parameter, especially discharge heat time, described volumetric flow measurement can improve accuracy.
Can arrange like this in a simple form of implementation of the present invention, namely, register can be connected with the heating element for making temperature control medium heat by means of at least one signal input part described, and wherein, the electric power consumed and/or the on-time of heating element are described parameter signals.Therefore also the present invention can be used when there is not temperature sensor or serviceability temperature sensor should be avoided.
Other parameter signals except measured temperature can be used equally.Example be use the on-time or for the change curve of the power consumption of the heating arrangement that makes heat eliminating medium heat as parameter signal.
For a lot of preferred temperature adjustment parameter, can expect progressive nature, that is, real balance temperature just can reach after the time of very long or endless.Advantageously, can store the margin tolerance at least one temperature adjustment parameter described in the storer be connected with processor thus, this margin tolerance is preferably by the desired value for characteristic parameter and formed for the tolerance value of the deviation allowed by desired value.
When such as carrying out work by means of the derivative of such as temperature difference as temperature adjustment parameter in this case, also advantageously, the threshold value at least one temperature adjustment parameter described can be stored in the storer be connected with processor.
In these cases, characteristic parameter can relatively simply as until reach the time point of margin tolerance or threshold value or time interval and determined.
Can arrange like this in particularly preferred form of implementation, namely, processor is configured for: determine that describing at least one temperature adjustment parameter described is reaching at least one parameter of function of the characteristic before the thermal steady state of mould by least one parameter signal described, and preferably determined until reach the time interval of described margin tolerance and/or threshold value by least one margin tolerance described when using at least one parameter described.
Especially, the determination of this parameter is by carrying out the curve of at least one temperature adjustment parameter described.
In this embodiment, particularly by providing multiple measured temperature, namely passing through to measure one or more temperature variation curve, it is likely that improve the accuracy of temperature adjustment parameter and/or curve.
In particularly preferred form of implementation of the present invention, a few independent parameter signal can be respectively provided to at least two temperature adjustment passages.This point makes to become possibility below, namely, processor is configured for: go out independent characteristic parameter for described at least two temperature adjustment path computations and send described independent characteristic parameter to output unit, and this output unit is applicable to described independent characteristic parameter export to operator and/or export to machine control unit.
It is possible that identify the longest temperature adjustment passage of required time of heating completely due to the independent characteristic parameter for temperature adjustment passage in this form of implementation.After this can affect this temperature adjustment passage targetedly, such as, be affected by the volumetric flow rate improved in this temperature adjustment passage.Such as by continuing this strategy repeatedly, can even make until the total duration that mould is heated completely minimizes.
In addition claimed a kind of temperature equipment, this temperature equipment has: for temperature control medium being inputed to the influent stream of at least one temperature adjustment passage of mould; For exporting the backflow of the temperature control medium of at least one temperature adjustment passage; Control or regulon; The adjusting mechanism that at least one and control or regulon is connected, this adjusting mechanism is for adjusting volumetric flow rate and/or the temperature of the temperature control medium being conducted through at least one temperature adjustment passage described; And according to register of the present invention.
Preferably can arrange like this, that is, the temperature of at least one temperature sensor measurement temperature control medium described.But on other occasions, the temperature measured such as at mould place is also significant.
In addition claimed a kind of forming machine, this forming machine has according to temperature equipment of the present invention or according to register of the present invention.
Forming machine can be regarded as injection machine, die casting machine, press etc. at this.
Accompanying drawing explanation
Other advantages of the present invention and details draw by means of accompanying drawing and accompanying drawing associated therewith.At this, wherein:
Fig. 1 illustrates the schematic diagram according to register of the present invention,
Fig. 2 illustrates the schematic diagram of the present invention in injection machine,
Fig. 3 and 4 illustrates two schematic diagram of the present invention in temperature equipment, and
Fig. 5 a, 5b and 6 illustrate three charts for showing the enthusiasm condition before heating completely in mould.
Embodiment
Pure symbol illustrates according to register 1 of the present invention in FIG.This register has processor 4, the output unit 6 be connected with processor 4 and storer 7.Also illustrate the connection of register 1 and temperature sensor 2 and volume flow control valve 5 and the different sensors arrangement relative to mould 3.
Output unit 6 has display screen and interface (both is not shown) in this case.Be operator especially indicating characteristic parameter t visually by display screen tol.Certainly the parameter (seeing below) of also exportable every other generation.
By (software control in this case) interface, output unit 6 is in addition by characteristic parameter t tolbe transferred to machine control unit, integrated register 1 in this machine control unit.Operator can determine whether automatic starting by machine control unit is produced or whether need operator's instruction for this reason when reaching elementary heat steady state (SS) in advance.
Some temperature adjustment passages 8 are provided with in mould 3.These temperature adjustment passages are supplied by influent stream 11, and wherein, influent stream 11 is formed by playing a junior one unique pipeline, and after this this pipeline diverges for each temperature adjustment passage 8 of supply.Backflow 12 is similar.At this, first temperature control medium is drawn and after this in a pipeline, is accumulated backflow from each temperature adjustment passage 8.The fork of heat eliminating medium stream in influent stream 11 and backflow 12 and collecting in known temperature control medium divider carries out.
Each branch for influent stream 11 and backflow 12 is provided with independent temperature sensor 2.This makes to carry out indivedual detection to the temperature difference Δ T of each temperature adjustment passage 8 becomes possibility.Temperature sensor 2 is with register 1 and be especially connected with the processor 4 of this register, and this processor performs the characteristic parameter t for the elementary heat steady state (SS) reaching mould 3 tolcalculating.The working method of register 1 can with reference to figure 5a, 5b and 6 and the explanation that is associated with these accompanying drawings.
Same be separately that each branch is arranged for adjusting the adjusting mechanism 5 affecting volumetric flow rate in other words in influent stream 11, and these adjusting mechanisms are also connected with processor 4.When normally running,---after reaching elementary heat steady state (SS)---these adjusting mechanisms are used as the adjusting mechanism 5 regulated by the temperature difference of the circulation of each temperature adjustment passage 8.In order to regulate the temperature difference under elementary heat steady state (SS), use volume flow sensor 9 in addition.Certainly equally can control temperature poor, therefore volume flow sensor is not that pressure is required.
The mean temperature difference that processor 4 is gone out in certain hour interval (such as one-period time) according to following formulae discovery by the measured temperature provided within the very short time interval of temperature sensor 2 for this reason
Δ T ‾ = ∫ t 1 t 2 V · · ρ · c p · Δ T · d t ∫ t 1 t 2 V · · ρ · c p · d t = Q ∫ t 1 t 2 V · · ρ · c p · d t - - - ( * )
At this, represent the volumetric flow rate recorded, ρ *and cp *represent density and the specific heat capacity of temperature control medium, Δ T *represent the difference of the measured temperature that each temperature adjustment passage 8 is recorded in influent stream 11 and backflow 12, and Q represents the heat of discharge.
Mean temperature difference then as the feedback parameters be used for by means of volume flow control valve 5 adjusted volume flow.This adjustment can be performed by processor 4 equally.
From to be averaging merely temperature difference different, consider the fluctuation of volumetric flow rate, specific heat capacity and density in like fashion.Calculate mean temperature difference by calorimeter and provide all advantages using heat (detecting the thermal equilibrium in mould 3), wherein, mean temperature difference is an easy understand and appreciable parameter compared to heat.
It should be noted that, temperature difference regulates for the present invention and insignificant.The present invention uses together with also can regulating with various other mould being carried out to temperature adjustment or control.
Fig. 2 partial schematic illustrates how the form of implementation of Fig. 1 is applied in injection machine 13.Register 1 is implemented as illustrated in fig. 1 like that.The difference of the form of implementation of Fig. 2 and the form of implementation of Fig. 1 is, volume flow sensor 9 and adjusting mechanism 5 to be arranged in backflow 12 but not to be arranged in influent stream 11.
The alternative form of implementation of Fig. 2 obtains in the following manner, that is, the temperature sensor 2 being arranged in influent stream 11 is replaced by the temperature sensor being provided with Reference numeral 2 ' at common influent stream.
Fig. 3 illustrates a kind of form of implementation, and wherein, the present invention is applied in temperature equipment 14.Temperature equipment 14 is implemented as and is separated with forming machine.Only there is a temperature adjustment loop 8 in this case, this temperature adjustment loop 8 is for carrying out temperature adjustment to mould 3.Temperature equipment 14 also can be used in multiple temperature adjustment loop 8 certainly.Register is similar to Fig. 1 and has processor 4, output unit 6 and storer 7.It should be noted that at this, output unit 6 (such as display screen) can directly be configured on temperature equipment 14.But also can be used in existing output unit 6 on forming machine and, as output unit 6, wherein, between temperature equipment 14 and forming machine, still must there is this data cube computation.
In the form of implementation shown in Fig. 3, temperature sensor 2 and volume flow sensor 9 are applied equally.That is, at least one parameter signal described comprises in this case as the multiple measured temperatures described in the form of implementation of Fig. 1 and Fig. 2.
The embodiment of the embodiment shown in Fig. 4 and Fig. 3 is similar, and difference is: non-application of temperature sensor 2, but uses at least one parameter signal of heating element 10.At least one parameter signal described can be the on-time of heating element 10 or the electric power consumption of heating element 10 in this case.It should be noted that, it is inner that heating element 10 is arranged in temperature equipment 14 in this case.That is, inner at temperature equipment 14, temperature control medium is transported to influent stream 11 from backflow 12 by means of pump (not shown).In this loop, before or after pump, arrange described heating element 10.This internal structure of temperature equipment 14 is not shown for the purpose of marking simply.
In order to be illustrated in reach elementary heat steady state (SS) before thermal environment in mould 3, the temperature T on the mold cavity surface in mould 3 is shown in figs. 5 a and 5 b idealizedly kO, when heating mould 3 produce heating power P, this heating power derivative and temperature control medium (being water in this case) the influent stream temperature T in influent stream 11 vO.
As can be seen, substantially invariable enthusiasm condition elementary heat steady state (SS) in other words can be generated after some time.Under thermal steady state, hot-fluid also continues flowing.When this illustrate, hot-fluid is constant and produces loss power P verlust.This value depends under basicly stable state by loss that radiation, convection current and heat transfer produce.
Each parameter derived that can read under elementary heat steady state (SS) all can be used as temperature adjustment parameter.
As already mentioned, produce by continuing or starting, periodicity (corresponding to a cycle length) change in thermal equilibrium can be superposed in steady state (SS).At production period, elementary heat steady state (SS) can be regarded as: the temperature adjustment parameter after average on the one-period time keeps substantially constant, or on certain time point limited within the cycle or over the cycle average after obtain substantially identical enthusiasm condition.
Next the characteristic parameter t for calculating for reaching for elementary heat steady state (SS) is provided tolsome examples.
The parameter that the example of temperature adjustment parameter is as used herein temperature difference Δ T, heating power P and is derived by these parameters, such as time-derivative with
The heating power P when being preheated to mould 3 can be calculated by the temperature difference Δ T recorded:
p = V · · ρ ( T ) · c p ( T ) · Δ T
At this, represent volumetric flow rate, and ρ (T) and c p(T) the usual density relevant with temperature and the specific heat capacity of temperature control medium is represented.
By the slope (first order derivative to the time) of powertrace or calibration slope can learn how heating process is in progress.When volumetric flow rate is constant and density and thermal capacity regard as constant, for the sake of simplicity, also can be by or for this object.
Alternatively, the temperature difference eliminating volumetric flow rate form can be used, as shown in equation (*).This point is favourable because temperature difference for operator be can more easily detect and also retain all advantages of power as temperature adjustment parameter simultaneously.
For each temperature adjustment passage 8, the exemplary variations curve of the temperature difference Δ T when heating mould is usually by following function representation:
Δ T ( t ) = ( ΔT 0 - ΔT ∞ ) · e - t - t 0 τ + ΔT ∞
This change curve is shown in Figure 6.
From on different time points to calculating constant Δ T in the measurement of Δ T 0, Δ T and τ.Δ T 0at time point t=t 0time exist temperature difference.Δ T it is temperature difference gradually stable after the sufficiently long heat time.This value depends under basicly stable state by loss that radiation, convection current and heat transfer produce.
When these constants known, time point t can be calculated tol, at this time point t tolon, temperature difference Δ T (t) and asymptotic value Δ T absolute deviation reach default, the tolerance value Δ T be stored in storer 7 tol.This equates:
| Δ T ( t T o l ) - ΔT ∞ | = ( ΔT 0 - ΔT ∞ ) · e - t T o l - t 0 τ = ΔT T o l
Thus, t tolbe calculated as follows:
t T o l = - τ 1 n ( ΔT T o l | ΔT 0 - ΔT ∞ | ) + t 0
At time point t, until the residue duration reaching tolerance is t tol-t.
Alternatively also can determine the tolerance threshold for temperature difference Δ T (i.e. d Δ T/dt) over time:
d Δ T ( t ) d t = d d t ( ΔT 0 - ΔT ∞ ) · e - t - t 0 τ + ΔT ∞ = - 1 τ ( ΔT 0 - ΔT ∞ ) · e - t - t 0 τ
For the time point reaching the threshold value be stored in storer 7 , be suitable in this case:
t T o l = - τ l n ( d Δ T d t | T o l τ | ΔT 0 - ΔT ∞ | ) + t 0
Alternatively or additionally, in order to this evaluation, the change curve of heating power and the reference curve obtained before this can be compared.
During heating can perform circulation equally to regulate, to minimize the heat time.At this, volume flow control valve 5 can be affected by processor 4, makes the passage 8 needing maximum duration to heat completely according to estimates stand higher temperature control medium volumetric flow rate.This point can realize particularly by with under type, that is: the quick and complete loop of heating of experience is carried out to throttling or removed the restriction in the loop slowly of heating.
It should be noted that, as used herein derivative and integration, as long as they relate to discrete measured value, just should be understood to the discrete homologue of these measured values.

Claims (17)

1. one kind for carrying out the register of temperature adjustment to mould (3), this register has at least one signal input part (15), at least one parameter signal can be inputed to processor by means of described signal input part, it is characterized in that, described processor is configured for calculating the characteristic parameter for reaching the elementary heat steady state (SS) of described mould (3) by least one temperature adjustment parameter and sending described characteristic parameter to output unit (6), the parameter that described temperature adjustment parameter is at least one parameter signal described or is derived by least one parameter signal described, described output unit is applicable to described characteristic parameter be exported to operator and/or exports to machine control unit.
2. register according to claim 1, it is characterized in that, the heat that at least one temperature adjustment parameter described is at least one temperature difference (Δ T), at least one is discharged, at least one heating power (P) or the parameter derived by these parameters.
3. register according to claim 1 and 2, it is characterized in that, this register (1) can be connected with at least one temperature sensor (2), preferably at least two temperature sensors (2) by means of described at least one signal input part (15), wherein, at least one measured temperature recorded by means of described at least one temperature sensor (2) is described parameter signal.
4. register according to any one of claim 1 to 3, it is characterized in that, at least two measured temperatures can input to described processor (4) as signal parameter, and described processor (4) is configured for obtaining at least one temperature difference (Δ T) by described at least two measured temperatures and considers described temperature difference (Δ T) when calculating described characteristic parameter.
5. register according to any one of claim 1 to 4, it is characterized in that, this register (1) can be connected with the heating element (10) for making temperature control medium heat up by means of described at least one signal input part (15), wherein, the on-time of the electric power consumed and/or this heating element (10) is described parameter signal.
6. register according to any one of claim 1 to 5, it is characterized in that, this register (1) can be connected with at least one volume flow sensor (5) by means of described at least one signal input part (15), wherein, the volumetric flow measurement recorded by means of described at least one volume flow sensor (5) can input to described processor (4).
7. register according to any one of claim 1 to 6, it is characterized in that, in the storer (7) be connected with described processor (4), lay in the margin tolerance at least one temperature adjustment parameter described, described margin tolerance is preferably by tolerance value (the Δ T of the deviation for being allowed by the value of described temperature adjustment parameter under thermal steady state tol) formed.
8. register according to claim 7, is characterized in that, described characteristic parameter is until at least one temperature adjustment parameter described reaches the time interval of described margin tolerance and/or is the time point that at least one temperature adjustment parameter described reaches described margin tolerance.
9. register according to any one of claim 1 to 8, is characterized in that, stores the threshold value (T at least one temperature adjustment parameter described in the storer (7) be connected with described processor (4) s).
10. register according to claim 9, is characterized in that, described characteristic parameter is until at least one temperature adjustment parameter described reaches described threshold value (T s) time interval (t s) and/or be that at least one temperature adjustment parameter described reaches described threshold value (T s) time point.
11. registers according to any one of claim 7 to 10, it is characterized in that, described processor (4) is configured for: at least one parameter (τ, the Δ T that are determined the function describing the described characteristic of at least one temperature adjustment parameter before the thermal steady state reaching described mould (3) by least one parameter signal described , Δ T 0), and preferably at use described at least one parameter (τ, Δ T , Δ T 0) when determined until reach described margin tolerance and/or threshold value (T by least one margin tolerance described s) time interval.
12. registers according to any one of claim 1 to 11, it is characterized in that, be provided with at least one temperature sensor (2), wherein, preferably be provided with at least two temperature sensors (2), and preferably guide to described mould (3) temperature adjustment passage (8) influent stream (11) place and in the backflow (12) of drawing from described temperature adjustment passage (8), a temperature sensor (2) is set respectively.
13. registers according to any one of claim 1 to 12, it is characterized in that, a few independent parameter signal is respectively provided to at least two temperature channel (8), and described processor (4) is configured for: described at least two temperature adjustment passages (8) are calculated to independent characteristic parameter and send these independent characteristic parameters to output unit (6), described output unit (6) is applicable to described independent characteristic parameter export to operator and/or export to machine control unit.
14. registers according to claim 13, it is characterized in that, described processor (4) can be connected with at least two adjusting mechanisms (5) for the volumetric flow rate regulating or control in described at least two temperature adjustment passages (8), and described processor (4) is configured for: improve the volumetric flow rate in following temperature adjustment passage (8), that is, the independent characteristic parameter of these temperature adjustment passages (8) shows more late heating completely.
15. 1 kinds of temperature equipments, it has: for temperature control medium being inputed to the influent stream (11) of at least one temperature adjustment passage (8) of mould (3); The backflow (12) of temperature control medium is exported from least one temperature adjustment passage (8) described; Control or regulon; And the adjusting mechanism (5) that at least one and control or regulon is connected, described adjusting mechanism is for adjusting volumetric flow rate and/or being conducted through the temperature of temperature control medium of at least one temperature adjustment passage (8) described, it is characterized in that, be provided with the register according to any one of claim 1 to 14.
16. 1 kinds of forming machines, it has register according to any one of claim 1 to 14 or temperature equipment according to claim 15.
17. 1 kinds for carrying out the method for temperature adjustment to mould (3), wherein
-temperature control medium is conducted through at least one the temperature adjustment passage (8) in mould (3), and
-at least one parameter signal is provided,
It is characterized in that,
-determine at least one temperature adjustment parameter by least one parameter signal described, the parameter that described temperature adjustment parameter is at least one parameter signal described or is derived by least one parameter signal described,
-calculate the characteristic parameter for reaching the elementary heat steady state (SS) of mould (3) by least one temperature adjustment parameter described, and
-described characteristic parameter exported to operator and/or to machine control unit.
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