CN103317693A - Injection moulding machine - Google Patents

Abstract

The invention provides an injection moulding machine, wherein the temperature of resin in a cylinder is managed. The injection moulding machine (10) comprises the components as follows: the cylinder (41) provided with resin; a plurality of heating sources (91-94) for heating the cylinder (41); a plurality of temperature sensors (21-24) for detection temperature at different positions of the cylinder (41); and a control apparatus (80) for controlling the heating sources (91-94) according to the temperature difference of the object temperature obtained by the temperature sensors (21-24) at different positions. The axial object temperature distribution is preset in the cylinder. The injection moulding machine is characterized in that the control apparatus (80) calculates the object temperature at the test positions of the temperature sensors (21-24) according to object temperature distribution, and control on the heating sources (91-94) is achieved according to the calculated object temperature.

Description

Injection (mo(u)lding) machine

Technical field

The present invention relates to injection (mo(u)lding) machine.

Background technology

Injection (mo(u)lding) machine possesses the injection device of the resin of injection melting in the die device.Die device is made of cover half and dynamic model, forms the die cavity space during matched moulds between cover half and dynamic model.Injection device will melting in cylinder resin from the nozzle injection of the front end that is arranged on cylinder, and be filled in the die cavity space in the die device.The resin that solidifies that is cooled in the die cavity space takes out as products formed after die sinking.

Injection device is included in the interior rotation of cylinder freely and is moving axially the screw rod that sets freely.Supply with resin material the end from from hopper to screw rod.When screw rod rotates, the scraper plate of screw rod (ridge) motion, the resin that is filled in the screw flight groove is sent to nozzle side from hopper side.

The temperature of the nozzle side of cylinder is maintained in the melt temperature of resin.On the other hand, the temperature of the hopper side of cylinder is maintained in the temperature of the softening melting of resin, so that can not send out bridge formation (caking) resiniferous.For this reason, the hopper side of cylinder is had the cooling-part cooling of refrigerant flow path by inside.

Cylinder is included in the cylinder main part that extends between cooling-part and the nozzle.The cylinder main part is divided into a plurality of districts vertically, in each district heating source and temperature sensor is set all.The a plurality of heating sources of difference FEEDBACK CONTROL (for example with reference to patent documentation 1) based on the target temperature at the place, measuring position of the measurement temperature of each temperature sensor and each temperature sensor.

Patent documentation 1: Japanese kokai publication hei 11-227019 communique

Each temperature sensor is with the temperature in each district of probe measurement, and the temperature the measured representation temperature as each district is managed.Therefore, to cylinder radially or axial Temperature Distribution do not manage, the Temperature Distribution axial to the cylinder of the inside wall of cylinder do not manage yet.

Figure 11 is the figure of the Temperature Distribution that represents that the cylinder of the inside wall of cylinder in the past is axial.Among Figure 11, represent that with solid line target temperature profiles, dotted line represent an example of the Temperature Distribution that obtains, chain-dotted line represents other examples of the Temperature Distribution that obtains, the measuring position of the temperature sensor that black circle expression cylinder is axial.

Near the measuring position of temperature sensor, owing to carrying out FEEDBACK CONTROL, target temperature is roughly consistent with the temperature that obtains (actual temperature).And the position of leaving from the measuring position of temperature sensor might be departed from more greatly with the temperature (actual temperature) that obtains by target temperature.

Because the inside wall of cylinder contacts with resin, so when the Temperature Distribution of the inside wall of cylinder departs from objectives Temperature Distribution, resin too high or too low for temperature.When the excess Temperature of resin, resin goes bad because of heat.And cross when low in the temperature of resin, the flowability of resin worsens, and the load of injection device is excessive.

Summary of the invention

The present invention namely makes in view of the above problems, and its objective is provides a kind of injection (mo(u)lding) machine that can manage the resin temperature in the cylinder.

In order to address the above problem, be characterised in that to possess based on the injection (mo(u)lding) machine of one embodiment of the present invention:

Cylinder is supplied to resin material,

A plurality of heating sources heat this cylinder;

A plurality of temperature sensors detect the temperature of the diverse location of above-mentioned cylinder; And

Poor based on the target temperature at the place, measuring position of the measurement temperature of this each temperature sensor and this each temperature sensor controlled above-mentioned a plurality of heating source,

Preset the axial target temperature profiles of cylinder of the above-mentioned inside wall of cylinder,

Above-mentioned control device calculates the target temperature at the place, measuring position of above-mentioned each temperature sensor based on above-mentioned target temperature profiles, use this target temperature that calculates to carry out the control of above-mentioned a plurality of heating sources.

The effect of invention:

According to the present invention, can provide a kind of injection (mo(u)lding) machine that can manage the temperature of the resin in the cylinder.

Description of drawings

Fig. 1 is the figure of summary of the injection (mo(u)lding) machine of expression first embodiment of the invention.

Fig. 2 is the figure of major part of the injection (mo(u)lding) machine of expression the first embodiment.

Fig. 3 is the key diagram of setting of the target temperature of the first embodiment.

Fig. 4 is the figure of major part of the injection (mo(u)lding) machine of expression second embodiment of the invention.

Fig. 5 is the figure of the 1st example of the position that presets target temperature in the cylinder of presentation graphs 4.

Fig. 6 is the figure of the 2nd example of the position that presets target temperature of the cylinder of presentation graphs 4.

Fig. 7 is the figure of the 3rd example of the position that presets target temperature of the cylinder of presentation graphs 4.

Fig. 8 is the key diagram of heat transfer equation of the cylinder of second embodiment of the invention.

Fig. 9 is the key diagram of the heat transfer equation of the interior material of the cylinder of second embodiment of the invention.

Figure 10 is the key diagram of the formula that flows into of the outflow of heat of the heating source of expression second embodiment of the invention.

Figure 11 is the figure of the axial Temperature Distribution of the cylinder of the existing inside wall of cylinder of expression.

Symbol description

10 injection (mo(u)lding) machines

21～24 temperature sensors

30 die devices

32 cover half

33 dynamic models

40 injection devices

41 cylinders

41a cylinder main part

42 nozzles

61 cooling-parts (cooling end)

80 control device

91～94 heaters (heating source)

The specific embodiment

Below, describe being used for implementing mode of the present invention with reference to the accompanying drawings, also description thereof is omitted to the additional identical or corresponding symbol of identical or corresponding structure in each accompanying drawing.In addition, the injection direction of the resin of injection device is made as the place ahead, will the direction opposite with injection direction be made as the rear and describes.

(the first embodiment)

Fig. 1 is the figure of summary of the injection (mo(u)lding) machine of expression first embodiment of the invention.Fig. 1 represents the state of matched moulds.

Injection (mo(u)lding) machine 10 possesses: framework 11; Be fixed on the fixation clip 12 on the framework 11; With many (for example four) connecting rods 16 that extend from fixation clip 12.And, injection (mo(u)lding) machine 10 also possess with fixation clip 12 arranged opposite and can move along connecting rod 16 (left and right directions among the figure moves) but the dynamic pressure plate 13 that sets.But on dynamic pressure plate 13 and opposed faces fixation clip 12 dynamic model 33 is installed, but in the opposed faces with dynamic pressure plate 13 of fixation clip 12 cover half 32 is installed.Consist of die device 30 by cover half 32 and dynamic model 33.But carry out mold closing, matched moulds and die sinking by dynamic pressure plate 13 relative fixation clip 12 contact separations.Form die cavity space C between the dynamic model 33 of matched moulds state and cover half 32.

Injection (mo(u)lding) machine 10 also possesses the resin of cylinder 41 interior meltings from nozzle 42 injections and be filled into injection device 40 the die cavity space C in the die device 30.Injection device 40 possesses injection motor 43.The rotation of injection motor 43 is delivered to ballscrew shaft 44.The ball-screw nut 45 of the rotation forward-reverse by ballscrew shaft 44 is fixed on the pressure plare 46.Pressure plare 46 can move along the guide rod 47,48 that is fixed on the pedestal (not shown).The forward-reverse motion of pressure plare 46 passes to screw rod 52 via bearing 49, force cell 50, injection shaft 51.Screw rod 52 is rotated freely and moves vertically and is provided in freely in the cylinder 41.52 rearward end is supplied with resin particle (resin material) from hopper 53 to screw rod.To measure with rotatablely moving of motor 55 via band or the connecting member 54 such as belt wheel and to pass to injection shaft 51.That is,, thus screw rod 52 is rotated with motor 55 rotary actuation injection shafts 51 by metering.

In measurement process, drive metering with motor 55, make screw rod 52 rotations, the resin particle that supplies to the rearward end of screw rod 52 is transported to the place ahead of screw rod 52.In this process, resin particle softens melting.Owing to having resin in the place ahead of screw rod 52, therefore, screw rod 52 retreats.In injection process, drive injection motor 43, screw rod 52 is advanced, the pushing resin is from nozzle 42 injections.Resin is pressed into via being formed on the running channel S on the cover half 32 among the die cavity space C that forms between cover half 32 and the dynamic model 33.The power of pushing resin is detected as counter-force by force cell 50.That is, detection is from the injection pressure of the resin of nozzle 42.The injection pressure that detects is imported in the control device 80.And resin is because of the cooling thermal contraction, so for the resin of supplemental heat amount of contraction, in the pressurize operation, the injection pressure of resin is retained as predetermined pressure in the C of die cavity space.

Position detector 57 for detection of the amount of movement of screw rod 52 is installed on the pressure plare 46.The detection signal of position detector 57 is imported in the control device 80.The detection signal of position detector 57 also can be for detection of the translational speed of screw rod 52.

Injection motor 43 and metering also can be respectively servo motor with motor 55, possess encoder 43a, 55a for detection of rotating speed.The rotating speed that is detected by encoder 43a, 55a is input to respectively in the control device 80.Control device 80 is based on testing result FEEDBACK CONTROL injection motor 43 and the metering motor 55 of encoder 43a, 55a.

The exercises of control device 80 control injection (mo(u)lding) machines 10.Control part 80 is made of microcomputer etc., such as having CPU, memory, timer, counter, input interface and output interface etc.

Fig. 2 is the figure of major part of the injection (mo(u)lding) machine of expression the first embodiment.

The rear portion 41b of cylinder 41 is inserted in the cooling-part (cooling end) 61, and by cooling-part 61 coolings.Be formed with resin supply port 62 on cooling-part 61 and the cylinder 41.Resin particle via resin supply port 62 41 interior supplies from from hopper 53 to cylinder is packed in the thread groove of screw rod 52.If screw rod 52 rotations, the then scraper plate of screw rod 52 (ridge) 52a motion is forwards carried the resin particle in the thread groove of screw rod 52.

The resin of the rear portion 41b of cylinder 41 cannot not be cooled to softeningly or infusible temperature.Be supplied to the cold-producing mediums such as cooling water on the cooling-part 61 in the formed refrigerant flow path 63, and by refrigerant cools cylinder 41.The front end of temperature sensor 25 is embedded in the cooling-part 61, and the detection signal of temperature sensor 25 is imported in the control device 80.

Cylinder 41 is included in the cylinder main part 41a that extends between cooling-part 61 and the nozzle 42.Be provided with a plurality of heating sources (for example heater) 91～94 at the outer wall 41c of cylinder main part 41a, cylinder main part 41a is heated to predetermined temperature.The resin that forwards moves in cylinder main part 41a is by the heat heating from heating source 91～94.Resin is followed to the moving of the place ahead of cylinder main part 41a becomes molten condition.At the leading section of cylinder main part 41a, resin becomes the state of complete melting.And, to follow in the place ahead of screw rod 52 and accumulate molten resin, screw rod 52 retreats.When the resin of scheduled volume is accumulated in the place ahead that screw rod 52 retreats preset distance, screw rod 52, stop the rotation of screw rod 52.And under the state of the rotation that stops screw rod 52, screw rod 52 advances, and thus, molten resin is 30 interior injections from nozzle 42 to die device.

Screw rod 52 vertically from the rear (resin supply side) (nozzle side) is divided into supply unit 52Z1, compression unit 52Z2, the 52Z3 of metering section to the place ahead.The part of supply unit 52Z1 for supplying with resin and forwards carrying.Compression unit 52Z2 is for compressing the resin of supplying with the part of melting on one side on one side.The 52Z3 of metering section is the part of the resin of melting being pressed a certain amount of metering.The degree of depth of the thread groove of screw rod 52 is dark at supply unit 52Z1 place, and is shallow at metering section 52Z3 place, more more shallow towards the place ahead in compression unit 52Z2.

Cylinder main part 41a is divided into vertically a plurality of (for example 4) distinguishes Z1～Z4, on district Z1～Z4 heating source 91～94 is set respectively.Supply electric current to each heating source 91～94 is controlled respectively, and cylinder main part 41a distinguishes Z1～Z4 and is heated by each.Each heating source 91～94 is arranged to surround the periphery of cylinder main part 41a.Although not shown, can heating source be set in the periphery of nozzle 42.

At district Z1～Z4 difference set temperature sensor (for example thermocouple) 21～24.The front end of each temperature sensor 21～24 is embedded among the cylinder main part 41a, and each temperature sensor 21～24 is measured temperature with needle point.The detection signal of each temperature sensor 21～24 is imported into control device 80.

Control device 80 is controlled a plurality of heating sources 91～94 based on the measurement temperature of each temperature sensor 21～24 and the difference of its target temperature.Controlled to the supply electric current of each heating source 91～94 that PID for example is controlled to be the measurement temperature of the temperature sensor 21～24 that makes the district Z1～Z4 corresponding with each heating source 91～94 and the difference of its target temperature diminishes.

In addition, also can be based on controlling with the measurement temperature of the temperature sensor in the district of the district Z1 of each heating source 91～94～Z4 adjacency to the supply electric current of each heating source 91～94.Consider the axial heat flux of cylinder, the temperature that the measuring position of each temperature sensor is located promptly can be converged to target temperature.And temperature sensor 21～24 respectively arranges respectively one on each district Z1～Z4, but also can respectively arrange a plurality of.Set a plurality of temperature sensors both can be located at axially different position of cylinder in the district, also can be located at cylinder diameter to different positions.

Then, based on Fig. 3 the establishing method of the target temperature at the place, measuring position of each temperature sensor is described.Fig. 3 is the key diagram of establishing method of the target temperature of the first embodiment.The shape of the cylinder main part that Fig. 3 (a) expression is actual, the shape of the cylinder main part that Fig. 3 (b) expression heat transfer model is used, the Temperature Distribution of Fig. 3 (c) expression cylinder main part inwall.Among Fig. 3 (c), solid line represents that the target temperature profiles set by the user, chain-dotted line represent the optimal Temperature Distribution that is calculated by heat transfer model.

In the present embodiment, at first, the user operates the input unit (for example keyboard) 82 of injection (mo(u)lding) machine 10, sets the axial target temperature profiles of cylinder of the inside wall of cylinder but not the target temperature at the place, measuring position of each temperature sensor 21～24.In addition, target temperature profiles also can the recording mediums such as memory of read control device 80 in pre-recorded content set.

In order to simplify calculating described later, 41a carries out the setting of target temperature profiles to the cylinder main part, and 41b also can omit for the cylinder rear portion.Be cooled parts 61 of the periphery of cylinder rear portion 41b surround, so that the temperature of cylinder rear portion 41b can become is roughly certain.Expression utilizes the user's of input unit 82 the operation signal of operation to be imported into control device 80, and is recorded in the recording medium such as memory.

Target temperature profiles axially is divided into a plurality of partitions with cylinder main part inwall 41d along cylinder, and each partition input temp is set.The user can set up corresponding image with the design temperature of each partition with the position of each partition and be presented in the display unit 84, while set the temperature of each partition so that confirm the position of the partition of design temperature.

The number of partition (being the number that the user carries out the position of Temperature Setting) than cylinder axially on the number (among Fig. 3 four) of the temperature sensor 21～24 that sets of devices spaced apart many.The temperature that replaces each partition can be inputted the function that represents target temperature profiles.The partition number increases in fact.

In a plurality of partitions, cylinder main part 41a from the rear end (ends of cooling-part 61 sides) to the preset distance in the place ahead with the interior division, as long as the softening melting of resin, as target temperature profiles, the higher limit of design temperature, but the lower limit of design temperature not.That is, make the temperature of the inside wall of cylinder be the target temperature profiles below the design temperature take interior set positions at the rear end preset distance MZ forwards from cylinder main part 41a.

Then, control device 80 calculates the target temperature at the place, measuring position of each temperature sensor 21～24 based on the target temperature profiles that is recorded in the recording medium.In the calculating of target temperature, use the heat transfer model that can calculate the Temperature Distribution of cylinder main part 41a based on the temperature of each heating source 91～94.In addition, also can use the heat transfer model that can calculate the Temperature Distribution of cylinder main part 41a based on the temperature of the temperature of each heating source 91～94 and cooling-part 61.

Shape such as Fig. 3 (b) of the cylinder main part 41a that heat transfer model is used are depicted as approximate drum.Therefore the temperature of cylinder main part 41a, can make heat transfer model based on the Two-Dimensional Heat diffusion equation that represents with following formula (1) because roughly even around the center line of cylinder main part 41a.

Formula 1

$\frac{\&PartialD;T}{\&PartialD;t}=\mathrm{\&alpha;}(\frac{{\&PartialD;}^{2}T}{{\&PartialD;\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="HDA00002945745200092.png"\; state="\{\{state\}\}">r</figure-callout>}}^2}+\frac{1}{r}\frac{\&PartialD;T}{\&PartialD;r}+\frac{{\&PartialD;}^{2}T}{{\&PartialD;z}^2})\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\left(1\right)$

$\mathrm{\&alpha;}=\frac{\mathrm{\&lambda;}}{\mathrm{\&rho;Cp}}$

In the above-mentioned formula (1), z represents the position coordinates that cylinder is axial, r represent cylinder diameter to position coordinates, the temperature that T denotation coordination (z, r) is located, t represents constantly.The z origin is the front end face of cylinder main part 41a, and the r origin is the center line of cylinder main part 41a.Measure in advance size (internal diameter, external diameter, axial length), the thermal diffusivity α (m of cylinder main part 41a ²/ s), and store in the memory etc. of control device 80.The temperature dependency of the size of cylinder main part 41a etc. is very little, can use the data of measuring under the room temperature (25 ℃).

In addition, as the formula (1), thermal diffusivity α can be by pyroconductivity λ (J/(sm ℃)), density p (kg/m ³) and specific heat at constant pressure Cp (J/(kg ℃)) calculate.Therefore, replace thermal diffusivity α, pyroconductivity λ, density p and specific heat at constant pressure Cp can be stored in the memory of control device 80.And, specific heat at constant pressure Cp(J/(kg ℃)) also can be by thermal capacity C(J/ ℃) with quality W(kg) ratio (Cp=C/W) calculate.Therefore can replace specific heat at constant pressure Cp that thermal capacity C and quality W are stored in the memory of control device 80.

In order to find the solution above-mentioned formula (1), provide boundary condition.For example, can be to the boundary B 5 between the boundary B 1～B4 between cylinder main part 41a and each heating source 91～94, cylinder main part 41a and the outer gas and the 6 applied heat condition of transmitting of the boundary B between cylinder main part 41a and the resin.And, can be to the rear end B7 Applicable temperature rigid condition of cylinder main part 41a.In addition, can use the heat flux boundary condition as boundary condition, the kind of boundary condition can be general kind.

The data of using in the boundary condition are determined by the kind of boundary condition.For example, the situation of above-mentioned boundary condition can be used the pyroconductivity (W/(m between (1) cylinder main part 41a and each heating source 91～94 ²℃)), the pyroconductivity (W/(m between temperature, (3) cylinder main part 41a and the outer gas of (2) each heating source 91～94 ²℃)), the pyroconductivity (W/(m between temperature, (5) cylinder main part 41a and the resin of (4) outer gas ²℃)), the temperature of (6) resin, the rear end temperature (temperature of cooling-part 61) of (7) cylinder main part 41a.These data can be inputted by the user, also can be pre-stored in memory of control device 80 etc.But when solving protruding optimization problem described later, the temperature of (2) each heating source 91～94 is used as the variable that should find the solution.In addition, as the variable that should find the solution, can append the temperature (temperature of cooling-part 61) of the rear end B7 of (7) cylinder main part 41a.

Above-mentioned formula (1) is in order to be divided into cylinder main part 41a a plurality of limited key elements and by discretization, to make linear system (simultaneous linear differential equation).By finding the solution the steady state solution of the linear system that makes, obtain the steady state solution of the Temperature Distribution of cylinder main part 41a, and can access the steady state solution of the Temperature Distribution of cylinder main part inwall 41d.The method of discretization can be general method.

Control device 80 makes at the steady state solution of the Temperature Distribution of cylinder main part inwall 41d and the difference between the target temperature profiles evaluation function of fractional value better (diminishing) more.Evaluation function can be employed general function in the protruding optimization problem.As the restriction condition of protruding optimization problem, the temperature upper limit that can use the user to set.That is, from the rear end B7 preset distance MZ forwards of cylinder main part 41 with interior position, the temperature of cylinder main part inwall 41d is that the following such restriction condition of design temperature is added in the protruding optimization problem.

Control device 80 is found the solution the optimal solution (optimal solution of the temperature under the stable state of each heating source 91～94) of evaluation function by quadratic programming.Then, the steady state solution of linear system found the solution the optimal solution that obtains as boundary condition again by control device 80.Thus, obtain the steady state solution of optimum of the Temperature Distribution of cylinder main part 41a.And, with reference to the data (r coordinate, z coordinate) of the measuring position of pre-recorded each temperature sensor 21～24 of expression in recording medium, obtain the most suitable temperature at the place, measuring position of each temperature sensor 21～24.Adopt this optimal temperature as target temperature.It is that target temperature is controlled a plurality of heating sources 91～94 that control device 80 uses the most suitable temperature.Thus, can make the Temperature Distribution of reality of cylinder main part inwall 41d as much as possible near target temperature profiles.

Because the Temperature Distribution of the reality of cylinder main part inwall 41d can not be measured, therefore, can replace it and show the steady state solution of optimum of the Temperature Distribution of cylinder main part inwall 41d at display unit 84 epigraphs.In order to compare, can be simultaneously in display unit 84 epigraph display-object Temperature Distribution.For example, can show the information shown in Fig. 3 (c) at display unit 84 epigraphs.The user is Visual Confirmation relatively also.

As discussed above, according to present embodiment, the target temperature at place, the measuring position of each temperature sensor 21～24 can calculate based on the target temperature profiles of the inside wall of cylinder of being set by the user.Therefore, can manage the temperature of the resin in the cylinder 41.In addition, the user to carry out the number of position of Temperature Setting more than the number (Fig. 3 is four) of temperature sensor 21～24.Because the temperature of also considering temperature sensor position is each other determined the target temperature at the place, measuring position of each temperature sensor, therefore, actual Temperature Distribution is little with the difference of target temperature profiles, can high accuracy manages the temperature of the interior resin of cylinder 41.

And, from rear end (ends of the cooling-part 61 sides) B7 of cylinder main part 41a to the place ahead preset distance MZ with interior position, as target temperature profiles, the higher limit of design temperature, the lower limit of design temperature not, so design temperature has flexibility.At this moment owing near the zone of cooling-part 61, needing only the softening melting of resin, just can not produce harmful effect in the conveying of resin.Reduce near the condition of target temperature profiles in the zone of cooling-part 61, therefore can make accordingly the difference of the Temperature Distribution of reality of location of resin melting and target temperature profiles little, can make the mobile optimization of the resin of melting.

(the second embodiment)

Preset the axial target temperature profiles of cylinder of the inside wall of cylinder in above-mentioned the first embodiment.

In the present embodiment, preset the target temperature of the pre-position of cylinder and/or cylinder interior.

Fig. 4 is the figure of major part of the injection (mo(u)lding) machine of expression second embodiment of the invention.A plurality of heating source H that injection (mo(u)lding) machine possesses cylinder 141, heats at the screw rod 152 of cylinder 141 interior conveying resins, to cylinder 141 ₁～H ₄Cooling-part 161 with the rear portion of cooling cylinder 141.

Screw rod 152 is rotated freely and moves vertically and is provided in freely in the cylinder 141.Along with the rotation of screw rod 152, along the spiral helicine groove that is formed on the screw rod 152 resin particle is forwards carried.

Heating source H ₁～H ₄Heating cylinder 141 and make resin melting in the cylinder 141.As heating source H ₁～H ₄For example can use from the heater of outside heating cylinder 141.Heater is configured to the periphery around cylinder 141.

A plurality of heating source H ₁～H ₄Along the axially-aligned of cylinder 141, cylinder 141 is divided into a plurality of districts (four district Z among Fig. 4 in the axial direction ₁～Z ₄) and respectively heating.Respectively distinguish Z in order to make ₁～Z ₄Temperature become design temperature and by a plurality of heating source H of control device 180 FEEDBACK CONTROL ₁～H ₄Each distinguishes Z ₁～Z ₄Temperature by temperature sensor S ₁～S ₄Measure.In addition, also heating source can be set on the nozzle 142.

Control device 180 is based on each temperature sensor S ₁～S ₄Measurement temperature and the temperature deviation between the target temperature of measuring position control a plurality of heating source H ₁～H ₄To each heating source H ₁～H ₄The supply electric current for example controlled PID and be controlled to the said temperature deviation is diminished.

Control device 180 calculates each temperature sensor S based on the target temperature in the precalculated position of cylinder and/or cylinder interior ₁～S ₄The target temperature at measuring position place, use this target temperature that calculates to carry out a plurality of heating source H ₁～H ₄Control.Use heat transfer model in the calculating of target temperature.

Preset the 1st example of the position of target temperature in the cylinder of Fig. 5 presentation graphs 4.The 2nd example of the position that presets target temperature in the cylinder of Fig. 6 presentation graphs 4.The 3rd example of the position that presets target temperature in the cylinder of Fig. 7 presentation graphs 4.In Fig. 5～Fig. 7, black circle expression presets the position of target temperature.

Set the position that presets target temperature shown in Figure 5 and the first embodiment same, be the inside wall of cylinder, and be spaced along the cylinder axially-spaced.The mode that can become with the temperature of the inside wall of cylinder desirable temperature is calculated each temperature sensor S ₁～S ₄The target temperature at measuring position place.Thus, can manage near the temperature of the resin of the inside wall of cylinder.

The position that presets target temperature shown in Figure 6 is the degree of depth and each temperature sensor S apart from the cylinder outer wall ₁～S ₄The position of measuring position same depth, be spaced along the cylinder axially-spaced.Therefore, can manage temperature sensor S ₁～S ₄The measuring position between temperature.

The position that presets target temperature shown in Figure 7 is cylinder interior, and is spaced along the cylinder axially-spaced.The mode that can become with the temperature of the resin of cylinder interior desirable temperature is calculated each temperature sensor S ₁～S ₄The target temperature at measuring position place, and the temperature that can manage the resin of cylinder interior.

In addition, preseting the position of target temperature can be in any position of cylinder or cylinder interior.For example, preset target temperature the position can for the measuring position of the depth ratio temperature sensor of distance cylinder outer wall more near the position of the inside wall of cylinder.And the position that presets target temperature also can be for being spaced at the cylinder axially-spaced, and the devices spaced apart that also can make progress in the footpath of cylinder is arranged.And the position that presets target temperature can on both of cylinder and cylinder interior, for example can be with the position both sides shown in the black circle among the position shown in the black circle of Fig. 6 and Fig. 7.The position that presets target temperature can pre-determine also and can be selected by the user.

Heat transfer model is can be based on each heating source H ₁～H ₄Temperature computation cylinder 141(comprise cylinder main part 141a) and the formula of the Temperature Distribution of cylinder 141 inside.

For example, heat transfer model is heat transfer equation and each heating source H based on the material in the heat transfer equation of cylinder 141, the cylinder 141 (below be also referred to as " material in the cylinder ") _KThe formula of the formula that the expression hot-fluid in (k=1,2,3,4 among Fig. 4) goes out to flow into.Below, describe various with reference to Fig. 8～Figure 10.In various, identical mark is equivalent.

Fig. 8 is the key diagram of the cylinder heat transfer equation of second embodiment of the invention.The heat transfer equation of cylinder is such as by expressions such as following formulas (2).In the formula (2), in order to simplify formula, the temperature of cylinder 141 is approximately roughly even around the center line of cylinder 141, two dimensionization.In addition, two dimensionization too in formula described later (3) and formula (4).

Formula 2

$\left\{\begin{array}{c}\frac{\&PartialD;T\left(t\right)}{\&PartialD;t}=\mathrm{\&alpha;}(\frac{{\&PartialD;}^{2}T\left(t\right)}{{\&PartialD;\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="HDA00002945745200092.png"\; state="\{\{state\}\}">r</figure-callout>}}^2}+\frac{1}{r}\frac{\&PartialD;T\left(t\right)}{\&PartialD;r}+\frac{{\&PartialD;}^{2}T\left(t\right)}{{\&PartialD;x}^2})\\ r=R_{\mathrm{out}}-y\end{array}\right.\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\left(2\right)$

In the above-mentioned formula (2), x represents the axially position coordinates of (fore-and-aft direction) of cylinder, y represent cylinder diameter to position coordinates, R _OutThe radius of outer peripheral face of expression cylinder 141, T(t) the expression temperature located of the coordinate (x, y) of t constantly, α represents the thermal diffusivity (m of cylinder 141 ²/ s).The x origin is the front end face of cylinder 141, and is larger towards rear end face x from front end face.And the y origin is the outer peripheral face of cylinder 141, and is more larger towards inner peripheral surface y from outer peripheral face.

With above-mentioned formula (2) discretization, the zone (being cylinder 141) that will define above-mentioned formula (2) is divided into a plurality of tiny areas (key element).With coordinate (i * Δ _{X, j}The temperature of the moment t of tiny area * Δ y) is made as T _{I, j}(t).I is that integer, the j of 0～m is the integer of 0～n.When the axial length of cylinder 141 was made as L, the formula of L=m * Δ x was set up.And, the radius of the inner peripheral surface of cylinder 141 is made as R _In, cylinder 141 the radius of outer peripheral face be made as R _OutThe time, R _Out-R _InThe formula of=n * Δ y is set up.The number of the tiny area of cylinder 141 (m+1) * (n+1) is set to the temperature of the optional position that can separate cylinder 141.

Programming rate (the temperature T of tiny area _{I, j}(t) a subdifferential) flowed into by the outflow with respect to the heat of this tiny area and determine, and by the temperature T of this tiny area _{I, j}(t) and and the temperature of the tiny area of this tiny area adjacency between temperature difference etc. determine.Therefore, the temperature T of tiny area _{I, j}(t) a subdifferential becomes the temperature T of tiny area _{I, j}(t) and the temperature T of the tiny area of adjacency _{I-1, j}(t), T _{I+1, j}(t), T _{I, j-1}(t), T _{I, j+1}(t) function (wherein, i is that integer, the j of 1～m-1 are the integer of 1～n-1).

The temperature T of the tiny area in the cylinder rear end (coordinate x=m * Δ x) _{M, j}(t) be retained the temperature roughly the same with the temperature T a of outer gas by cooling-part 161.Therefore, the boundary condition as between cylinder rear end and the outer gas can provide the temperature rigid condition.That is, T _{M, j}(t)=formula of Ta sets up.In addition, the temperature T of cylinder rear end _{M, j}(t) can be retained temperature T than outer gas _aHigh predetermined temperature Tc(Tc＞Ta).

On the other hand, as the boundary condition between the boundary condition between cylinder front end (coordinate x=0) and the outer gas, cylinder periphery (coordinate y=0) and the outer gas, cylinder periphery (coordinate y=0) and heating source H _KBetween boundary condition and cylinder in boundary condition between the interior material of week (coordinate y=n * Δ y) and cylinder, provide the heat flux boundary condition.

Therefore, the programming rate (temperature T of the tiny area of cylinder front end (coordinate x=0) _{0, j}(t) a subdifferential) by the temperature of this tiny area, and temperature T a, cylinder 141 and the outer gas of the temperature of the tiny area of this tiny area adjacency, outer gas between the coefficient of heat conduction (W/(m ²℃)) etc. decision.

Programming rate (the temperature T of the tiny area that contacts with outer gas in the cylinder periphery (coordinate y=0) equally, _{I, 0}(t) a subdifferential) by the temperature of this tiny area, and temperature T a, cylinder 141 and the outer gas of the temperature of the tiny area of this tiny area adjacency, outer gas between the coefficient of heat conduction (W/(m ²℃)) etc. decision.

And, in the cylinder periphery (coordinate y=0), with heating source H _KProgramming rate (the temperature T of the tiny area of contact _{I, 0}(t) a subdifferential) by the temperature of this tiny area, with temperature, the heating source H of the tiny area of this tiny area adjacency _KTemperature T _Hk(t), between cylinder 141 and the heating source Hk the coefficient of heat conduction (W/(m ²℃)) etc. decision.

In addition, the boundary condition between cylinder periphery and the cooling-part 161 can and cylinder periphery and heating source Hk between boundary condition identical.

Programming rate (the temperature T of the tiny area in week (coordinate y=n * Δ y) in the cylinder _{I, n}(t) a subdifferential) by the temperature of this tiny area, with the temperature of the tiny area of this tiny area adjacency, cylinder in the temperature T of material ^Fl _i(t), the coefficient of heat conduction (W/(m between material and the cylinder 141 in the cylinder ²℃)) etc. decision.Temperature T for material in the cylinder ^Fl _i(t) aftermentioned.

In addition, the air when material can begin the intensification of front cylinder 141 for for example moulding in the cylinder, the resin during moulding changes midway and also can.

Fig. 9 is the key diagram of the heat transfer equation of material in the cylinder of second embodiment of the invention.The heat transfer equation of material is such as using the expression (wherein, i is the integer of 1～m-1) such as following formula (3) in the cylinder.In the formula (3), oversimplify in order to make formula, the Temperature Distribution of the interior material of cylinder is radially even cylinder 141.

Formula 3

$\frac{{{\&PartialD;T}^{\mathrm{fl}}}_i\left(t\right)}{\&PartialD;t}\&times;{\mathrm{\&rho;}}_{\mathrm{in}}\&times;c_{\mathrm{in}}\&times;\mathrm{\&pi;}\&times;R_{\mathrm{in}}^2\&times;\mathrm{\&Delta;x}=q_1-{\mathrm{<figure-callout\; id="2"\; label="q"\; filenames="HDA00002945745200092.png"\; state="\{\{state\}\}">q</figure-callout>}}_2+q_3\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\left(3\right)$

In the above-mentioned formula (3), T ^Fl _i(t) temperature of the moment t of the short space of denotation coordination x=i * Δ x (℃), ρ _InDensity (the kg/m of material in the expression cylinder ³), c _InThe specific heat at constant pressure (J/kg) of material in the expression cylinder.

q ₁Be illustrated in coordinate x(x=i * Δ x) tiny area in the inflow heat (W) of the time per unit that the tiny area of (Fig. 9 left side) flows into from the place ahead.Flow into heat q ₁Become the temperature difference (T between tiny area ^Fl _I-1(t)-T ^Fl _i(t)) function.This temperature difference is larger, flows into heat q ₁More increase.Flow into heat q ₁Calculating in use the pyroconductivity (W/(m ℃) of material in the cylinder) etc.

q ₂Expression is from coordinate x(x=i * Δ x) the tiny area outflow heat (W) of the time per unit that flows out of the tiny area on (right side Fig. 9) rearward.Flow out heat q ₂Become the temperature difference (T between tiny area ^Fl _i(t)-T ^Fl _I+1(t)) function.This temperature difference is larger, flows out heat q ₂More increase.Flow out heat q ₂Calculating in use the pyroconductivity (W/(m ℃) of material in the cylinder) etc.

q ₃Denotation coordination x(x=i * Δ x) heat (W) that time per unit flows into from cylinder 141 in the tiny area.This heat q ₃Become the temperature difference (T between the interior material of cylinder and the cylinder 141 _{I, n}(t)-T ^Fl _i(t)) function.This temperature difference is larger, heat q ₃More increase.At heat q ₃Calculating in, use the coefficient of heat conduction (W/(m between the material and cylinder 141 in the cylinder ²℃)) etc.

The temperature T of the rear end (coordinate x=m * Δ x) of material in the cylinder ^Fl _m(t) be retained temperature T with outer gas by cooling-part 161 _aRoughly the same temperature.Therefore, as the rear end of material in the cylinder and the boundary condition between the outer gas, provide the temperature rigid condition.That is, T ^Fl _m(t)=T _aFormula set up.In addition, the temperature T of the rear end of material in the cylinder ^Fl _m(t) can be retained temperature T than outer gas _aHigh predetermined temperature T _c(T _c＞T _a).

On the other hand, as the front end (coordinate x=0) of material in the cylinder and the boundary condition between the outer gas, provide the heat flux boundary condition.Therefore, the programming rate (temperature T of the front end (coordinate x=0) of material in the cylinder ^Fl ₀(t) a subdifferential) by the temperature of this tiny area, the temperature with the tiny area of this tiny area adjacency, the temperature T of outer gas _a, the coefficient of heat conduction (W/(m in the cylinder between material and the outer gas ²℃)), the coefficient of heat conduction (W/(m in the cylinder between material and the cylinder ²℃)) etc. decision.

Figure 10 flows out the key diagram of the formula that flows into for the heat of the heating source of expression second embodiment of the invention.Expression heating source H _kIn the formula that flow out to flow into of heat such as using the expression such as following formula (4).In the formula (4), for the simplification of formula, in each heating source Hk, be made as Temperature Distribution the same.

Formula 4

$\frac{{\&PartialD;T}_{\mathrm{hk}}\left(t\right)}{\&PartialD;t}\frac{1}{C_k}(\frac{V_k{\left(t\right)}^2}{Z_k}-{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002945745200041.png"\; state="\{\{state\}\}">h</figure-callout>}}_1\&times;A_k\&times;(T_{\mathrm{hk}}\left(t\right)-T_a)-Q_k)\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\left(4\right)$

In the above-mentioned formula (4), T _Hk(t) expression heating source H _KMoment t temperature (℃), T _aThe expression outer gas temperature (℃), C _KExpression heating source H _KThermal capacity (J/ ℃), Z _KExpression heating source H _KResistance (Ω), A _KExpression heating source H _KContact area, H with outer gas _KExpression heating source H _KAnd the coefficient of heat conduction (W/(m between the outer gas ²℃)), V _K(t) the heating source H of expression moment t _KVoltage (V).

V _K(t) ²/ Zk represents heating source H _KOutput (caloric value of time per unit) (W), H _K* A _K* (T _Hk-T _a) represent from heating source H _KHeat dissipation capacity (W), the Q of the time per unit of outside gas leakage _KExpression is from heating source H _KThe inflow heat (W) of the time per unit that flows into to cylinder 141.

Coefficient of heat conduction h _kCan be heating source H _KAnd the temperature difference (T between the outer gas _Hk(t)-T _a) function.Its temperature difference is larger, coefficient of heat conduction H _KLarger.

Flow into heat Q _KCan be heating source H _KAnd the temperature difference (T between the cylinder 141 _Hk(t)-T _{I, 0}(t)) function.This temperature difference is larger, flows into heat Q _KMore increase.Wherein, i for the expression cylinder 141 a plurality of pettiness zone in heating source H _KThe integer of the coordinate in the pettiness zone of contact.

Like this, based on the heat transfer equation (formula (3)) of material in the heat transfer equation (formula (2)) of cylinder 141, the cylinder and represent each heating source H _KThe formula (formula (4)) that go out to flow into of hot-fluid etc. make heat transfer model.

Heat transfer model can be for by the formula of low-dimensional in order to shorten computing time.For example, the heat transfer equation (formula (3)) of material is linear equation in the heat transfer equation of cylinder 141 (formula (2)) and the cylinder, therefore, can keep inputting and the relation of exporting, also can be by low-dimensionals such as balance realization methods.On the other hand, represent each heating source H _KThe formula (formula (4)) that flows into of the outflow of heat owing to be nonlinear equation and originally be low-dimensional, so it is also passable not carry out low-dimensionalization.

Control device 180 is by each the heating source H with predetermined instant _KOutput (W) be input in the heat transfer model, can calculate the temperature T of optional position of the cylinder 141 of predetermined instant _{I, j}(t).The number of the tiny area of cylinder 141 (m+1) * (n+1) is than temperature sensor S _KThe number of (k=1 among Fig. 4,2,3,4) (among Fig. 4 being 4) is obviously many, therefore, can understand the detailed Temperature Distribution of cylinder 141.In addition, each heating source H _KThe output waveform of output till can be used as from initial time (t=0) to predetermined instant be input to the heat transfer model.

And control device 180 is by each the heating source H with predetermined instant _KOutput (W) be input in the heat transfer model, also can calculate the temperature T of the tiny area of material in the cylinder of predetermined instant ^Fl _i(t), each heating source H of predetermined instant _KTemperature T _Hk(t).Therefore, also can understand detailed temperature distribution, each heating source H of the inside of cylinder 141 _KTemperature.In addition, each heating source H _KThe output waveform of output till can be used as from initial time (t=0) to predetermined instant be input to the heat transfer model.

Heat transfer model is owing to being differential equation, so, can provide initial value T _{I, j}(t=0), T ^Fl _i(t=0), T _Hk(t=0), find the solution thus T _{I, j}(t), T ^Fl _i(t), T _Hk(t).Initial time (t=0) can be the intensification zero hour of for example cylinder 141, initial value T _{I, j}(t=0), T ^Fl _i(t=0), T _Hk(t=0) with the temperature T of outer gas _aIdentical also passable.

In addition, each initial value T _{I, j}(t=0), T ^Fl _i(t=0), T _Hk(t=0) can be for known, also can with the temperature T of outer gas _aIdentical.That is, initial time (t=0) can not be the intensification zero hour of cylinder 141.

In the present embodiment, the in-service evaluation function is found the solution T _{I, j}(t), T ^Fl _i(t), T _Hk(t) therefore steady state solution can not know initial value T _{I, j}(t=0), T ^Fl _i(t=0), T _Hk(t=0).

Control device 180 can pass through heating source H _KPower meter P _KDetections such as (with reference to Fig. 4) is input to the heating source H in the heat transfer model _KOutput (W).Based on heating source H _KThe output waveform of reality infer temperature, therefore, infer that precision is high.

And control device 180 also can pass through heating source H _KThe control constant (for example proportional gain, storage gain, the differential gain) of feedback control model (for example PID control model) calculate the heating source H that is input in the heat transfer model _KOutput.At first, control device 180 is by temperature sensor S _KThe temperature T of measuring position _{I, j}(t) and the deviation between the design temperature and control constant predict the heating source H of the following constantly t+ Δ t after leaning on a little than moment t _KOutput.Then, control device 180 is with the heating source H of prediction _KOutput be input in the heat transfer model, prediction is the temperature sensor S of t+ Δ t constantly _KThe temperature of measuring position.Like this, repeatedly carry out heating source H _KThe prediction of output and temperature prediction, thus, control device 180 not only can be predicted present temperature and temperature in the past, can also predict temperature in the future.

In addition, the heating source H till now _KOutput by power meter P _KDetect heating source H in the future _KOutput predict also passable with the control constant of feedback control model.

Control device 180 is made the evaluation function of the less value of difference more accurate (diminishing) of temperature that the heat transfer model that uses the pre-position preset target temperature calculates and predefined target temperature.Evaluation function can be employed general function in protruding optimization problem.Can apply restriction condition in the protruding optimization problem, this restriction condition be make from the rear end (ends of cooling-part 161 sides) of cylinder main part 141a to the place ahead preset distance MZ(with reference to Fig. 2) take the predefined target temperature in interior position below design temperature.And as restriction condition, the rear end that can also be given in than cylinder main part 141a is restriction condition such below the design temperature by the predefined target temperature in position at rear also.

Control device 180 is found the solution optimal solution (each heating source H of evaluation function by quadratic programming ₁～H ₄Stable state under the optimal solution of temperature).Then, control device 180 is made as the steady state solution that boundary condition is found the solution heat transfer model again with resulting optimal solution.Thus, can access the optimum steady state solution of the Temperature Distribution of cylinder or cylinder interior.And, with reference to pre-recorded each the temperature sensor S in recording medium of expression ₁～S ₄The data (x coordinate, y coordinate) of measuring position, can obtain each temperature sensor S ₁～S ₄The most suitable temperature at measuring position place.This most suitable temperature is adopted as target temperature.It is that target temperature is controlled a plurality of heating source H that control device 180 utilizes the most suitable temperature ₁～H ₄Thus, the temperature of the reality of pre-position is tried one's best near predefined target temperature.

Control device 180 can show with display device images the optimum steady state solution of the Temperature Distribution that is calculated by heat transfer model.Control device 180 also can show with display device images the distribution of predefined target temperature.

Above embodiments of the present invention and variation are illustrated, but the present invention is not limited to above-mentioned embodiment etc., in the scope of the main points of the present invention of technical scheme record, can implements various distortion, replacement.

For example, in the above-described first embodiment, find the solution the thermal diffusion equation of steady state problem, but also can find the solution the thermal diffusion equation of unstable state problem, at this moment, except boundary condition, given primary condition.

And, in above-mentioned the first embodiment and above-mentioned the second embodiment, with interior position, there is not the lower limit of design temperature from the rear end (end of cooling-part side) of cylinder main part to the place ahead preset distance, but the lower limit that design temperature within the specific limits also can design temperature.The lower limit of temperature can be for example room temperature (25 ℃).

And, in above-mentioned the first embodiment and above-mentioned the second embodiment owing to solving protruding optimization problem with restriction condition, shown in use quadratic programming, but when not having restriction condition, also can use least square method.

And in above-mentioned the first embodiment and above-mentioned the second embodiment, the degree of depth of formed groove according to circumstances and different but also can be for necessarily on the screw rod.

Claims (8)

1. an injection (mo(u)lding) machine is characterized in that,

Have:

Cylinder is supplied to resin material;

A plurality of heating sources heat this cylinder;

A plurality of temperature sensors detect the temperature of the diverse location of above-mentioned cylinder; And

Control device, poor based on the target temperature at the place, measuring position of the measurement temperature of this each temperature sensor and this each temperature sensor controlled above-mentioned a plurality of heating source,

Preset the axial target temperature profiles of cylinder of the above-mentioned inside wall of cylinder,

Above-mentioned control device calculates the target temperature at the place, measuring position of above-mentioned each temperature sensor based on above-mentioned target temperature profiles, and uses this target temperature that calculates to carry out the control of above-mentioned a plurality of heating sources.

2. an injection (mo(u)lding) machine is characterized in that,

Have:

Cylinder is supplied to resin material;

A plurality of heating sources heat this cylinder;

A plurality of temperature sensors detect the temperature of the diverse location of above-mentioned cylinder; And

Control device, poor based on the target temperature at the place, measuring position of the measurement temperature of this each temperature sensor and this each temperature sensor controlled above-mentioned a plurality of heating source,

Preset the target temperature of the pre-position of above-mentioned cylinder and/or above-mentioned cylinder interior,

Above-mentioned control device calculates the target temperature at the place, measuring position of above-mentioned each temperature sensor based on above-mentioned predefined target temperature, use this target temperature that calculates to carry out the control of above-mentioned a plurality of heating sources.

3. injection (mo(u)lding) machine as claimed in claim 1 or 2, wherein,

The number of the above-mentioned position that presets target temperature is more than the number along the said temperature sensor of above-mentioned cylinder axially-spaced arranged spaced.

4. such as the described injection (mo(u)lding) machine of any one among the claim 1-3, wherein,

Also possess:

Cooling end cools off an end of above-mentioned cylinder; With

Nozzle is arranged on the other end of above-mentioned cylinder,

Above-mentioned cylinder is included in the cylinder main part that extends between above-mentioned cooling end and the said nozzle, is provided with above-mentioned a plurality of heating source and above-mentioned a plurality of temperature sensor at this cylinder main part,

With interior position, the design temperature higher limit is as above-mentioned predefined target temperature at the preset distance from an end of above-mentioned cooling end side to above-mentioned nozzle side of above-mentioned cylinder main part.

5. injection (mo(u)lding) machine as claimed in claim 4, wherein,

Using in the calculating of the target temperature at place, the measuring position of above-mentioned each temperature sensor can be based on the heat transfer model of the Temperature Distribution of the above-mentioned cylinder main part of the temperature computation of above-mentioned each heating source.

6. injection (mo(u)lding) machine as claimed in claim 5, wherein,

Use size and the thermal diffusivity of above-mentioned cylinder main part in the calculating of the above-mentioned target temperature at the place, measuring position of above-mentioned each temperature sensor.

7. injection (mo(u)lding) machine as claimed in claim 6, wherein,

In the calculating of the above-mentioned target temperature at place, the measuring position of above-mentioned each temperature sensor, use the temperature of an end of the cooling end side of the temperature of the interior resin of the pyroconductivity between the interior resin of the temperature of the pyroconductivity between the pyroconductivity between above-mentioned cylinder main part and above-mentioned each heating source, above-mentioned cylinder main part and the outer gas, above-mentioned outer gas, above-mentioned cylinder main part and above-mentioned cylinder main part, above-mentioned cylinder main part and above-mentioned cylinder main part.

8. such as the described injection (mo(u)lding) machine of any one among the claim 5-7, wherein,

Above-mentioned control device is found the solution the optimal solution of evaluation function by quadratic programming, calculate thus the target temperature at the place, measuring position of above-mentioned each temperature sensor, wherein, described evaluation function is the temperature calculated of the above-mentioned heat transfer model of use of the above-mentioned position that presets target temperature, the evaluation function better with the less value of difference of above-mentioned predefined target temperature.

Images