CN110319635B - Temperature control device and molding machine with temperature control device - Google Patents
Temperature control device and molding machine with temperature control device Download PDFInfo
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- CN110319635B CN110319635B CN201810428783.1A CN201810428783A CN110319635B CN 110319635 B CN110319635 B CN 110319635B CN 201810428783 A CN201810428783 A CN 201810428783A CN 110319635 B CN110319635 B CN 110319635B
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- 238000000465 moulding Methods 0.000 title claims description 39
- 230000001105 regulatory effect Effects 0.000 claims abstract description 84
- 238000005259 measurement Methods 0.000 claims abstract description 55
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000007689 inspection Methods 0.000 claims abstract description 19
- 238000005496 tempering Methods 0.000 claims description 36
- 230000008859 change Effects 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 7
- 230000001902 propagating effect Effects 0.000 claims description 4
- 238000001746 injection moulding Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000003750 conditioning effect Effects 0.000 claims 1
- 238000001816 cooling Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
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- 230000004069 differentiation Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
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- 230000007363 regulatory process Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
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- General Engineering & Computer Science (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a temperature control device, wherein a configuration protocol is provided which can be interrogated by the at least one control or control device, said configuration protocol specifying: which sensor's measurement signal is expected when a signal is generated for at least one selected media connection and/or which sensor's measurement signal is expected or not expected when no signal is generated for at least one selected media connection and a signal is generated for at least one further media connection, the at least one control or regulating device being configured for, in an inspection mode: if measurement signals of a sensor are received or not received, an alarm signal or a fault signal is displayed or issued, the sensor is not a sensor for which measurement signals are expected or not expected according to the configuration procedure, and/or if measurement signals of a sensor are received or not received, the configuration procedure is changed, the sensor is not a sensor for which measurement signals are expected or not expected according to the configuration procedure.
Description
Technical Field
The invention relates to a tempering device and a molding machine having such a tempering device.
Background
The medium connection through which the temperature control medium can flow can comprise, for example, a temperature control circuit with a temperature-controllable component of the molding machine. In the following, for example, a temperature-controllable component is used as a basis, which is in the form of a mold of a molding machine having at least two temperature control circuits. Each temperature control circuit has a supply line (Vorlauf) and a return line (R) which is connected to the supply line via a cavity which is arranged in the mold and through which a temperature control medium can flow.
The temperature control medium can be used, for example, to control the temperature of at least one section of the mold. This may mean cooling, warming or keeping the temperature constant, depending on the case. Different temperature control circuits can be assigned to different sections of the mold, so that different temperature control can be carried out for these different sections. The temperature-regulating medium can be a fluid, preferably a liquid, such as water or oil (with or without additives). Tempering medium distributors are frequently used. It is also common to supply the temperature control medium separately to the cavities through which it can flow, without using a temperature control medium distributor. The respective through-flowing cavities can be supplied with a temperature control medium at a lower pressure or with a different temperature. With this design, it is possible to: locally different temperatures are generated in the mould or specific geometries of the mould are taken into account which require stronger cooling or heating or higher costs for maintaining a constant temperature.
Each temperature control circuit of a temperature control device of this type has a supply line and a return line for a temperature control medium, wherein the supply line and the return line are connected to one another via a cavity which is arranged in the mold and through which the temperature control medium can flow. The temperature control circuits of the temperature control devices can be arranged together in one structural unit or in structural units that are separate from one another.
The cavity of the mold through which the mold can flow is connected to the temperature control device by means of a hose or a tube. The cavity through which the fluid can flow is often configured as a bore in the mold. The cavity of the mold through which the mold can flow is often connected via a quick coupling with a hose to a supply line or a return line of the tempering device. These quick couplers have the advantage: the time for the mold preparation process can be saved in the case of frequent mold replacement. The cavities through which the fluid can flow are labeled with well-defined, distinguishing names. Depending on the geometry and the position of the cavities through which the fluid can flow, a certain flow of the temperature control medium is required in order to control the temperature of the mold as uniformly as possible or to set the temperature for the shaping in the optimum local region. If, for example, heat is conducted away from the mold by means of the medium (cooling of the mold), the medium heats up through the mold from the inlet to the outlet. The temperature difference of the temperature-regulating medium at the inlet to outlet point is measurable and can be used as a quality parameter of the process. An indirect correlation exists between the flow rate (═ volume/time unit) of the tempering medium and the temperature difference. It is therefore possible to determine for each temperature control circuit through which a flow rate should be passed which should not be lowered in order to keep the temperature difference within the desired range.
Temperature control media are distributed from a supply source (e.g., a central supply station or individual supply stations) to a plurality of cavities of a mold through which a temperature control medium can flow by means of temperature control medium distributors which are customary today. The flow rate can be adjusted individually for each cavity that can be flowed through by means of the tempering medium distributor. These parameters can be monitored by a control or regulating device if the desired flow rate is regulated. In the case of a regulated tempering medium distributor, the possibility additionally arises of regulating the flow rate or the temperature difference. In order to set the desired flow rate by means of the measurement signal of the sensor and thus to keep it constant, a controllable or adjustable valve can be controlled, for example, by a control or regulating device. The temperature difference can likewise be set by adjusting the flow rate.
It is known to compile the names of the supply line and the return line of the temperature control device for the configuration of the cavities that can be flowed through and the associated supply line and return line on the mold in order to be able to reuse the monitoring or regulating values of the initial regulation for the same cavities that can be flowed through in the event of a mold change. In this way, a configuration protocol (Zuordnungsvorschrift) is generated, which can also be stored in the control or regulating device. The compilation of the configuration or the storage of the configuration protocol in the control or regulating device is of significance primarily in the case of frequent mold changes.
In the case of a large number of cavities through which flow can be made, it can happen that the cavity through which flow can be made of the mold is connected incorrectly to the temperature control device or that the cavity through which flow can be made of the mold is connected to the wrong supply line or the wrong return line. This may happen as follows: for example, one of the forward lines of the distributor is connected to the inlet of the correct flow-through cavity of the mold, while the hose at the outlet of the flow-through cavity is connected to the wrong return line of the distributor. In this case, this is sometimes referred to as a faulty "connection" in an informal manner and is independent of whether the hose is actually used or not. If the sensor is located in the return line of the dispenser, a monitoring or regulating value is set for an incorrect cavity which can be flowed through by the control or regulating device to which the signal of the sensor can be supplied. And then run with the wrong parameters.
If a method is used as described, for example, in AT 513042B 1, the temperature control device can compare the reference value (for example, the hydraulic resistance) of the further temperature control circuit with the actual value of the temperature control circuit, which is checked in the form of an image, due to a faulty connection.
In the case of molds which are absolutely customary in the industry during this time, some are provided with more than a hundred different cavities in one mold through which flow can be carried out. Finding an error in a connection in such a large number of cavities that can be flowed through is difficult and requires a lot of time for the person to find the error.
Disclosure of Invention
The purpose of the invention is: a tempering device of this type and a molding machine with such a tempering device are provided, in which the above-mentioned problems do not arise.
This object is achieved by a tempering device and a molding machine with such a tempering device having the features described below. The temperature adjusting apparatus includes: at least one control or regulating device; a first medium connection through which a temperature control medium can flow, having a first sensor assigned to the first medium connection, the measurement signal of which can be transmitted to the at least one control or regulating device; a second medium connection through which the temperature control medium can flow, having a second sensor assigned to the second medium connection, the measurement signal of which can be transmitted to the at least one control or regulating device; the temperature control device is characterized in that: the at least one control or regulating device is designed to generate or allow the generation of a signal detectable by the sensor for at least one selected media connection in the checking mode, and a configuration protocol is provided which can be interrogated by the at least one control or regulating device and which specifies:
which sensor's measurement signal is expected when generating a signal for at least one selected media connection, and/or
When no signal is generated for at least one selected media connection and a signal is generated for at least one further media connection, the measurement signal of which sensor is expected or not expected,
the at least one control or regulating device is configured for, in an inspection mode:
if a measurement signal of a sensor is or is not received, an alarm signal or fault signal is displayed or emitted, the sensor not expecting or not expecting its measurement signal according to the configuration protocol, and/or
If a measurement signal of a sensor is or is not received, the configuration procedure is changed, the sensor not being a sensor for which a measurement signal is or is not expected according to the configuration procedure.
The configuration procedure may exist, for example, in the form of a table, a layout, a logical or mathematical procedure, or in other ways. It may be stored in the control or regulating device itself or may be otherwise available to the control or regulating device (e.g., in the form of being stored in an off-center storage medium or cloud).
It can be provided that: if a measurement signal is received or not received from a sensor that is not the sensor whose measurement signal is expected or not expected according to the configuration protocol, an alarm signal or fault signal is displayed or issued. In this case, the operator knows whether he has to check whether the medium connection, for example which forward line is connected to which return line, has been made correctly. Ideally, the temperature control device would inform him about which medium connection(s) is/are faulty, for example which forward line and which return line are incorrectly connected to each other. The operator can make corrections to the connection.
It can be provided that: at least one control or regulating device is configured for: if a measurement signal is received or not received from a sensor that is not a sensor for which a measurement signal is expected or not expected according to the configuration protocol, the configuration protocol is changed. In this case, no correction of the incorrect connection by the operator is required, since the at least one control or regulating device is already using the actually existing connection situation as a basis for all control or regulating processes. This is of course premised on the following: there is no media connection that should be connected but not.
If the at least one control or regulating device is configured for determining that a change of the media connection, in particular a change of the connection, has occurred, the checking mode of the at least one control or regulating device can be initiated by an operator or automatically. The check mode can also be started cyclically automatically after a defined number of start-up thermostat devices or each time a thermostat device is started.
It should be noted that: the at least one control or regulating device can be in the form of a single control or regulating device which can generate signals for the first and second media connections or can receive measurement signals of the first and second media connections and can carry out the check by means of the configuration procedure itself. But this is not essential. For example, separate control or regulating devices can be provided for the first and second media connections, which control or regulating devices can generate signals and/or receive measurement signals. The evaluation of the measurement signals and the comparison with the configuration protocol can take place in one of these control or regulating devices or else in a separate control or regulating device. But is always only referred to in this disclosure as "at least one control or regulating device".
In the following, for example, a media connection with a supply line and a return line is assumed.
In a first variant of the invention, the inspection is carried out starting from a forward line: which return line is connected to which forward line. This first modification is explained below.
In the simplest case, a signal is generated on a selected preceding line and the detection of which of the return lines the generated signal is detectable as a measurement signal is carried out. For example, the flow rate of the temperature control medium can be changed for a selected preceding line and a change in the flow rate can be detected in which of the return lines is present. If there are more than two onward lines, all onward lines can be carried out in succession or simultaneously (when differentiation is possible by means of the signals used).
Alternatively, it is possible to generate a signal on all the forward lines except the selected forward line and to detect as measuring signal which return line of the return lines the generated signal is not detectable or which return line of the return lines the generated signal is detectable. In this case, the measurement signals of all sensors are expected, except for the sensor assigned to the selected media connection. No measurement signal is expected with respect to the selected media connection. For example, the flow rate of the temperature control medium can be changed for all the forward lines, except for the selected forward line, and a change in the flow rate is detected in which of the return lines no change in the flow rate occurs. It is of course also possible to detect in which of the return lines a change in the flow rate occurs.
It is also possible to generate signals simultaneously on all or several of the preceding lines, the generated signals distinguishing for example different changes in the flow rate or a change in the flow rate in one medium connection from a change in the temperature in another medium connection, and detecting which generated signal can be detected on which return line in the return lines as a measurement signal.
In a second variant of the invention, the detection is carried out starting from the return line: which return line is connected to which forward line. This second variant can be implemented similarly to the first variant described above, wherein the concepts "forward line" and "return line" can be interchanged. Of course, attention is drawn here to the signals used: only signals that can propagate counter to the flow direction of the tempering medium (for example changes in the flow rate, pressure changes, sound, etc.) are used.
The temperature control device preferably has a signal generating device by means of which a signal can be generated, so to speak automatically, on at least one selected forward line or return line. This signal generating device can have, for example, for generating the signal:
regulating means (for example a controllable or adjustable valve, a controllable or adjustable throttle plate, a shut-off valve or a pump) for changing the flow rate of the temperature-regulating medium, and/or
Regulating means for changing the physical value or chemical property of the temperature control medium, preferably for changing the pressure, temperature, color or conductivity of the temperature control medium, and/or
A transmitting device for emitting a signal which propagates in the temperature control medium (for example, sound or a sample (Pruefkoerper) placed in the temperature control medium or an inspection medium placed in the temperature control medium and conveyed via the temperature control medium to a return line connected to the cavity through which the signal can flow).
However, if the temperature control device has no signal generating device or if this signal generating device for some reason cannot or should not be used by at least one control or regulating device, a so-to-speak semi-automatic check can be carried out completely. In this case, a display device is provided, by means of which it is possible to display to the operator of the temperature control device which of the forward line or the return line he should produce a signal.
The manner in which the measurement signal is detected will of course be adapted to the manner in which the signal is generated. If the signal generation is effected, for example, by a change in the flow rate of the temperature control medium, the monitoring of the flow rate of the temperature control medium by means of a flow sensor is detected, in the case of temperature monitoring by means of a temperature sensor, etc. The relevant quantities can also be taken into account, for example, the expansion (change in cross section) of the hose connected to the medium as the pressure rises (signal generation, detection, circumference, diameter).
It can be provided that: at least one control or regulating device prevents a transition into the production mode of the molding machine when a faulty connection is detected.
It can be provided that: the tempering device itself is provided with at least one control or regulating device having an inspection mode. But it is also possible to provide: the at least one control or regulating device with the inspection mode is formed by a central control or regulating device of the molding machine. If the temperature control device is in the form of a plurality of structurally separate units, it can be provided that: each structural unit is provided with a control or regulating device having an inspection mode. Each structural unit can have one media connection or a plurality of media connections of the temperature control device.
It is also possible to: the inspection mode is set on an external control or regulating device, without the control or regulating device being physically connected to the temperature control device or the molding machine (for example via a tablet computer or a "Manufacturing-Execution-System").
It can be provided that: the invention is used only in selected partial medium connections of a plurality of medium connections of a temperature control device.
A further field of application of the invention relates to a temperature control device, in which a first medium connection is formed by a first supply unit having a forward line and a temperature control medium distributor that can be connected via the forward line, wherein the temperature control medium distributor can be connected with the first supply unit by a return line, and a second medium connection is formed by a second supply unit having a forward line and a temperature control medium distributor that can be connected via the forward line, wherein the temperature control medium distributor can be connected with the second supply unit by a return line. The logic circuit of the invention here likewise functions as in the above-described example of a temperature-controlled mold.
It should also be noted that: the invention can not only check whether the forward pipeline is connected with the correct return pipeline, but also check whether the return pipeline (or the forward pipeline) is wrongly connected as the forward pipeline (or the return pipeline).
The invention is particularly preferably used in releasable media connections.
Preferably, the temperature control device has a signal generating device, by means of which a signal can be generated for at least one selected media connection, or a display device, by means of which it is possible to display for an operator of the temperature control device: on which media connection he should generate a signal.
Preferably, the signal generating apparatus for generating a signal has: a control device for changing the flow rate of the temperature control medium and/or a control device for changing a physical or chemical property of the temperature control medium, preferably for changing the pressure, temperature, color or conductivity of the temperature control medium, and/or a transmitting device for emitting a signal propagating in the temperature control medium.
Preferably, the alarm signal or fault signal to be displayed or issued by the at least one control or regulating device contains information about which media connection configuration protocol(s) was violated, and preferably information about which change in connection over media can comply with the configuration protocol.
Preferably, at least one of the sensors is selected from the group consisting of: a sensor for detecting the flow rate of the temperature control medium, and/or a sensor for detecting a change in a physical or chemical property of the temperature control medium, preferably a change in the pressure, temperature, color or electrical conductivity of the temperature control medium, and/or a sensor for detecting a signal propagating in the temperature control medium.
Preferably, the temperature control device is designed for supplying a temperature control medium to a temperature-controllable component of the molding machine by means of the temperature control medium, and the first medium connection is formed by a first temperature control circuit having a forward line and a return line connected thereto via a cavity which is arranged in the temperature-controllable component and through which the temperature control medium can flow, and the second medium connection is formed by a second temperature control circuit having a forward line and a return line connected thereto via a cavity which is arranged in the temperature-controllable component and through which the temperature control medium can flow, the at least one control or control device being designed for, in an inspection mode: generating a signal on at least one selected lead line, and detecting: the generated signal is detected on which return line as a measurement signal or not, and/or a signal is generated on at least one selected return line, and: on which forward line the generated signal can be detected or cannot be detected as a measurement signal; and/or the at least one control or regulating device is configured for, in an inspection mode: generating no signal on at least one selected preceding line and generating a signal for at least one further preceding line, detecting: the generated signal is not detectable or is detectable as a measurement signal on which return line and/or no signal is generated on at least one selected return line and a signal is generated for at least one further return line, detecting: the signal generated on which upstream line as a measurement signal cannot be detected or can be detected.
Preferably, the temperature-adjustable component of the molding machine is configured as a mold, a peripheral device of the molding machine or a plasticizing cylinder of the molding machine.
It is preferable that: the first medium connection is formed by a first supply unit having a forward line and a tempering medium distributor connectable via the forward line, which can be connected with the first supply unit by a return line, and the second medium connection is formed by a second supply unit having a forward line and a tempering medium distributor connectable via the forward line, which can be connected with the second supply unit by a return line, the at least one control or regulating device being configured for, in an inspection mode: generating a signal on at least one selected lead line, and detecting: the generated signal is detected or not as a measurement signal on which return line and/or a signal is generated on at least one selected return line and: on which forward line the generated signal can be detected or cannot be detected as a measurement signal; and/or the at least one control or regulating device is configured for, in an inspection mode: generating no signal on at least one selected preceding line and generating a signal for at least one further preceding line, detecting: the generated signal is not detectable or is detectable as a measurement signal on which return line and/or no signal is generated on at least one selected return line and a signal is generated for at least one further return line, detecting: the signal generated on which upstream line as a measurement signal cannot be detected or can be detected.
The molding machine, in particular the injection molding machine, according to the invention has at least one temperature control device according to the invention.
Preferably: provision is made for the at least one control or regulating device with the inspection mode to be formed by a central control or regulating device of the molding machine or for the temperature control device itself to have at least one control or regulating device with the inspection mode.
Preferably: provision is made for the temperature control device to have the first medium connection and the second medium connection in a common structural unit, or for the first medium connection and the second medium connection to be arranged in separate structural units.
Drawings
Fig. 1 to 5 show various embodiments of the invention. Wherein,
fig. 1 shows a tempering device for supplying a mold of a molding machine with a tempering medium;
fig. 2 shows a tempering device for supplying a mold of a molding machine with a tempering medium;
fig. 3 shows a tempering device for supplying a mold of a molding machine with a tempering medium;
fig. 4 shows a temperature-regulating device for supplying a mold of a molding machine with a temperature-regulating medium;
fig. 5a shows an exemplary flow diagram of a device according to the invention for monitoring a temperature control device;
FIGS. 5b to 5d show parts of an exemplary flow chart of the apparatus according to the invention shown in FIG. 5 a;
fig. 6 shows a temperature control device with a plurality of temperature control medium distributors and a plurality of supply units for the temperature control medium distributors.
Detailed Description
Fig. 1 to 5, for example, relate to a temperature control device 1 for supplying a temperature control medium to a temperature-controllable component in the form of a mold 2 of a molding machine, not shown. Fig. 6, for example, relates to a temperature control device 1 having a plurality of temperature control medium distributors and a plurality of supply units for the temperature control medium distributors.
Fig. 1 shows a tempering device 1 for supplying a not shown molding machine with a mold 2 having, for example, four cavities 8 through which a tempering medium can flow. The releasability of the individual connections (reference numeral 21) is shown, for example, only in this figure. The temperature control medium distributor is designed as a single structural unit. Separately from the temperature-regulating medium distributor, a pump 3 is provided which is driven by a motor 4. The tempering medium is pressurized by a pump 3. After the pressure of the temperature control medium by the pump 3, the temperature control medium reaches the distributor unit 5, by which it is distributed to four forward lines 6. A separate control or regulating device 11 is provided for the temperature control device 1 and a separate control or regulating device 13 is provided for a molding machine, not shown in detail. As can be seen in this exemplary embodiment, a controllable or adjustable valve 7 is provided in each supply line 6, by means of which a control or regulating device 11 can control or regulate the flow rate of the temperature control medium in the respective supply line 6.
After the temperature-regulating medium has flowed through the controllable or adjustable valve 7, it flows into the mold 2 via a connecting point E1, E2, E3, E4 of the respective forward line 6. In this mold 2, the temperature control medium flows through the through-flow cavities 8 connected to the respective forward lines 6 before it leaves the mold 2 again at a connection point a1, a2, A3, a4 of the respective return line 12. In the return line 12, the temperature control medium first flows past a sensor, which is embodied here as a flow sensor 9, before it reaches the collecting device 10. In this collecting device 10, the temperature control medium is collected again in a line and returned to the pump 3. It can also be provided that: between the collecting device 10 and the pump 3, a storage tank and/or a cooling device for cooling the temperature control medium and/or a heating device for heating the temperature control medium are provided.
As is shown by dashed lines in fig. 1, the controllable or adjustable valve 7 and the flow sensor 9 are connected to a control or regulating device 11. By means of this control or regulating device 11, the selected control or regulating valve 7 can be controlled in a targeted manner in order to vary the flow rate in the at least one supply line 6. The control or regulating valve 7 thus functions as a signal generating device. This variable flow rate of the forward line 6 forms a measurement signal which is generated by the signal generating device and can then be determined after flowing through the cavity 8 through which it can flow by means of the flow sensor 9 in the return line 12. By means of such a procedure, the control or regulating device 11 can unambiguously assign the return line 12 to the forward line 6 in the test mode and compare this with a predetermined assignment protocol.
Alternatively, a control or regulating valve 7 can be arranged in the return line 12 and a flow sensor 9 can be arranged in the forward line 6. Fig. 2 shows that the signal generating device is arranged in the return line 12 in this way and the sensor is arranged in the forward line 6 in this way. In this case, the sensor is configured as a flow sensor 9 and the signal generating device is designed as a controllable or adjustable valve 7.
In the above-described manner, the control or regulating device 11 can flow through all the forward lines 6 simultaneously or in succession and each be assigned to a return line 12. In such a flow, the control or regulating device 11 will determine, in the example shown in fig. 1: the preceding line 6 of the preceding line number 6.3 is connected to the return line 12 of the number 12.4 (hereinafter abbreviated to: return line number 12.4), and the preceding line 6 of the preceding line number 6.4 is connected to the return line 12 of the return line number 12.3.
However, when the configuration code stored in the control or regulating device 11 requires that the forward line number 6.3 is connected to the return line number 12.3 and the forward line number 6.4 is connected to the return line number 12.4, a discrepancy (abeichung), which may be detected by the control or regulating device 11, for example, by the connected (here shown by dashed lines) control or regulating device 13 which can be fed to the molding machine, can be detected. This control or regulating device 13 of the moulding machine can then, for example, bring the moulding machine into a waiting state and issue an alarm or fault signal to the operator indicating an unsatisfactory feature, depending on the fault signal transmitted by the control or regulating device 11. This characteristic alarm or fault signal may for example be displayed to the operator: the return line number 12.4 must be interchanged with the return line number 12.3, by means of which the state shown in fig. 3 can be established. The signals representing the features may be emitted in the form of text and/or diagrams.
Fig. 3 shows the same embodiment as fig. 1, with the only difference that: the forward line numbers 6.3 and 6.4 are correctly connected with the return line numbers 12.3 and 12.4.
Fig. 4 shows an application of a temperature control device 1 comprising a plurality of units which are structurally separated from one another. Each structural unit of the temperature control device 1 has a pump 3, which is driven by a motor 4. In this exemplary embodiment, each of the modules supplies a forward line 6 which leads to a mold 2 and guides the temperature control medium to the cavity 8 of the mold 2 through which it can flow. Each return line 12 leads back to the respective structural unit. In this embodiment, a temperature control circuit is provided for each structural unit.
Furthermore, each of these modules has a separate control or regulating device 11, with which it can be determined whether a measuring signal is detected after a signal has been emitted. This information is transmitted to the control or regulating device 13 of the molding machine, which checks, by means of a configuration protocol, for each structural unit: whether the corresponding forward line 6 is connected to the correct return line 12.
In this case, provision may also be made for: a pressure difference is generated as a signal in the individual temperature control circuits or in the structural units by means of the pump 3. This can be achieved, for example, by changing the pump speed, changing the speed or direction of rotation of the motor 4, switching the electric machine 4 on and off, or the like. The pressure change can then be determined as a measurement signal by means of the pressure sensor and the correct connection of the forward line 6 and the return line 12 of the respective module can be checked. However, it is also possible (as shown here) to change the temperature of the temperature control medium as a signal by means of the heating device 16 or the cooling device 14 and to determine this change as a measurement signal by means of a temperature sensor 15.
Fig. 5 shows an exemplary flowchart of a method according to the invention for testing a temperature control device 1. In the test mode, the start of the so-called "connection test" (Verschlauchungscheck) is first initiated and the status signal is set to "true". First, the forward line number 6.1 of the forward line 6 begins, the forward line 6 and the return line 12 being numbered in an ascending manner.
Firstly, inquiring: the number of onward lines 6 to be checked exceeds the number of onward lines 6 used. Since this is not the case in the initial flow, the process continues along with the yes decision (Ja-Entscheidung) by first opening a controllable or adjustable valve 7 arranged in the forward line 6 in order to generate a signal. Waiting until this controllable or adjustable valve 7 is fully opened. Once this controllable or adjustable valve 7 is fully opened, the remaining controllable or adjustable valves 7 are closed. After closing the controllable or adjustable valve 7, one sensor (referred to herein as a "check circuit") of the return line 12 of the configuration of return line number 12.1 is interrogated as follows: whether a measurement signal is detected, which is generated in the forward line 6 of the forward line number 6.1 by opening the controllable or adjustable valve 7.
If this is not the case, the number of the return line 12 is increased and the return line number 12.2 is first queried: whether the return line number exceeds the number of return lines 12 used. When the answer is yes, in this return line number 12.2 it is asked: a signal of the forward line 6 of the forward line number 6.1 arrives in this return line.
This step is repeated for a long time until the number of return lines 12 exceeds the number of return lines 12 actually present and then an alarm message is issued ("no flow detected. check supply") and the status signal is changed to "false", or until a signal of the preceding line number 6.1 is detected in one of the return lines 12. If this is the case, it is checked whether this return line 12 also corresponds to the previously determined forward line 6. If this is the case, the process is returned and repeated with the next onward line 6. If the preceding line 6 does not correspond to the return line 12, a warning message is output ("the preceding line circuit Y is incorrectly connected to the return line X"), the status signal is changed to "false" and the next preceding line 6 is reused. This is repeated until the number of preceding lines 6 currently to be checked exceeds the number of preceding lines 6 used. If this is the case, all fault reports are issued-as long as the status signal "false" is present-and the "connection check" is ended.
Fig. 5b to 5d show an enlarged part of an exemplary flow chart of the device according to the invention according to fig. 5 a.
Fig. 6 shows a temperature control system 1, in which a first medium connection is formed by a first supply unit 17 having a forward line 6 and a first temperature control medium distributor 19 connected via the forward line 6, the first temperature control medium distributor 19 being connected to the first supply unit 17 by a return line 12, and a second medium connection is formed by a second supply unit 18 having the forward line 6 and a second temperature control medium distributor 20 connected via the forward line 6, the second temperature control medium distributor 20 being connected to the second supply unit 18 by the return line 12.
The supply units 17, 18 and the tempering medium distributors 19, 20 are each provided with a control or regulating device 11. A central control or regulating device 13 (for example of the molding machine) is provided, which communicates with the individual control or regulating devices 11. The logic circuit of the method according to the invention can be implemented as described above for the mold 2 of the molding machine. The configuration procedure can be queried by the individual control or regulating devices 11 or by the central control or regulating apparatus 13. The check can be carried out in the respective control or regulating device 11 or in the central control or regulating device 13 accordingly.
In this embodiment, both the media connection between the temperature control medium distributor 19, 20 and the mold 20 and the media connection between the temperature control medium distributor 19, 20 and the supply unit 17, 18 can be checked with the invention.
List of reference numerals
1 temperature control device
2 mould
3 Pump
4 Motor
5 distributor unit
6 advancing pipeline
6.1 Advance line numbering
6.2 Advance line numbering
6.3 Advance line numbering
6.4 Advance line numbering
7 controllable or adjustable valve
8 cavity through which flow can be passed
9 flow sensor
10 collecting device
11 control or regulating device
12 return line
12.1 Return line numbering
12.2 Return line numbering
12.3 Return line numbering
12.4 Return line numbering
13 control or regulating device for a moulding machine
14 Cooling device
15 temperature sensor
16 heating device
17 first supply unit
18 second supply unit
19 first temperature control medium distributor
20 second temperature control medium distributor
21 sign for releasable connection
E1 connection point of advancing pipeline
E2 connection point of advancing pipeline
E3 connection point of advancing pipeline
E4 connection point of advancing pipeline
Junction of return line of A1
Junction of return line of A2
Junction of return line of A3
Junction of return line of A4
Claims (15)
1. Tempering device (1) comprising:
at least one control or regulating device (11),
a first medium connection through which a temperature control medium can flow, having a first sensor assigned to the first medium connection, the measurement signal of which can be transmitted to the at least one control or regulating device (11),
a second medium connection through which the temperature control medium can flow, having a second sensor assigned to the second medium connection, the measurement signal of which can be transmitted to the at least one control or regulating device (11),
the method is characterized in that:
the at least one control or regulating device (11) is designed to generate or allow the generation of a signal detectable by the sensor for at least one selected media connection in the checking mode,
a configuration procedure is provided which can be interrogated by the at least one control or regulating device (11), said configuration procedure specifying:
which sensor's measurement signal is expected when generating a signal for at least one selected media connection, and/or
When no signal is generated for at least one selected media connection and a signal is generated for at least one further media connection, the measurement signal of which sensor is expected or not expected,
the at least one control or regulating device (11) is configured for, in an inspection mode:
if a measurement signal of a sensor is or is not received, which sensor does not expect or expect a measurement signal according to the configuration protocol, an alarm signal or fault signal is displayed or emitted, and/or
If a measurement signal of a sensor is received or not received, which sensor is not a sensor for which a measurement signal is expected or not according to the configuration procedure, the configuration procedure is changed.
2. Tempering device according to claim 1, characterized in that: the temperature control device (1) has a signal generating device, by means of which a signal can be generated for the at least one selected medium connection, or a display device, by means of which it is possible to display for an operator of the temperature control device (1): on which media connection he should generate a signal.
3. Tempering device according to claim 2, characterized in that: a signal generating apparatus for generating a signal has:
adjusting means for changing the flow rate of the temperature control medium, and/or
Adjusting means for changing a physical value or a chemical property of the temperature control medium, and/or
A transmitting device for emitting a signal propagating in the temperature-regulating medium.
4. A tempering device according to claim 3, wherein: the physical value or chemical property of the temperature control medium comprises the pressure, temperature, color or electrical conductivity of the temperature control medium.
5. Tempering device according to one of claims 1 to 4, characterized in that: the alarm signal or fault signal to be displayed or issued by the at least one control or regulating device (11) contains information about which media connection configuration procedure or media connection configuration procedures were violated.
6. Tempering device according to claim 5, characterized in that: the alarm signal or fault signal contains information about which change of connection over the medium can comply with the configuration procedure.
7. Tempering device according to one of claims 1 to 4, characterized in that: at least one of the sensors is selected from the group consisting of:
sensor for detecting the flow rate of a temperature control medium, and/or
Sensor for detecting a change in a physical or chemical property of a temperature control medium, and/or
A sensor for detecting a signal propagating in the temperature control medium.
8. Tempering device according to claim 7, characterized in that: the physical value or chemical property of the temperature control medium comprises the pressure, temperature, color or conductivity of the temperature control medium.
9. Tempering device according to one of claims 1 to 4, characterized in that: the temperature control device (1) is designed to supply a temperature control medium to a temperature-controllable component (2) of a molding machine by means of the temperature control medium, and
the first medium connection is formed by a first temperature control circuit having a forward line (6) and a return line (12) connected to the forward line (6) via a cavity (8) in the temperature-controllable component (2) through which a temperature control medium can flow,
the second medium connection is formed by a second temperature control circuit having a forward line (6) and a return line (12) connected to the forward line (6) via a cavity (8) in the temperature-controllable component (2) through which a temperature control medium can flow,
-said at least one control or regulation device (11) is configured for, in an inspection mode:
generating a signal on at least one selected advancing line (6), and
detection: the signal generated is detectable or undetectable as a measurement signal on which return line (12) and/or
Generating a signal on at least one selected return line (12), and
detection: the signal generated on which advancing line (6) can or cannot be detected as a measurement signal, and/or
-said at least one control or regulation device (11) is configured for, in an inspection mode:
no signal is generated on at least one selected advancing line (6) and a signal is generated for at least one further advancing line (6),
detection: the signal generated on which return line (12) is not detectable or is detectable as a measurement signal and/or
Generating no signal on at least one selected return line (12) and generating a signal for at least one further return line (12),
detection: the signal generated on which advancing line (6) is not detectable or is detectable as a measurement signal.
10. The temperature conditioning apparatus of claim 9, wherein: the temperature-adjustable component (2) of the molding machine is designed as a mold, a peripheral device of the molding machine or a plasticizing cylinder of the molding machine.
11. Tempering device according to one of claims 1 to 4, characterized in that:
the first medium connection is formed by a first supply unit having a forward line (6) and a temperature control medium distributor connectable via the forward line (6), which can be connected to the first supply unit by a return line,
the second medium connection is formed by a second supply unit having a forward line (6) and a temperature control medium distributor connectable via the forward line (6) and connectable with the second supply unit by a return line,
-said at least one control or regulation device (11) is configured for, in an inspection mode:
generating a signal on at least one selected advancing line (6), and
detection: the signal generated is detectable or undetectable as a measurement signal on which return line (12) and/or
Generating a signal on at least one selected return line (12), and
detection: the signal generated on which advancing line (6) can or cannot be detected as a measurement signal, and/or
-said at least one control or regulation device (11) is configured for, in an inspection mode:
no signal is generated on at least one selected advancing line (6) and a signal is generated for at least one further advancing line (6),
detection: the signal generated on which return line (12) is not detectable or is detectable as a measurement signal, and/or
Generating no signal on at least one selected return line (12) and generating a signal for at least one further return line (12),
detection: the signal generated on which advancing line (6) is not detectable or is detectable as a measurement signal.
12. The make-up machine, its characterized in that: having at least one tempering device (1) according to one of claims 1 to 11.
13. The molding machine of claim 12, wherein: the molding machine is an injection molding machine.
14. The molding machine of claim 12, wherein: provision is made for the at least one control or regulating device (11) having the checking mode to be formed by a central control or regulating device (13) of the molding machine, or for the temperature control device (1) itself to comprise the at least one control or regulating device (11) having the checking mode.
15. The molding machine of one of claims 12 to 14, wherein: provision is made for the temperature control device (1) to have the first medium connection and the second medium connection in a common structural unit, or for the first medium connection and the second medium connection to be arranged in separate structural units.
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| CN2018204237700 | 2018-03-28 | ||
| CN201820423770 | 2018-03-28 |
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| AT524681B1 (en) * | 2021-03-13 | 2022-08-15 | Wittmann Tech Gmbh | Process for tempering a shaping tool in injection molding, die casting and extrusion applications |
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