AT517832A4 - Method for determining the position of an initiation point of a Auftreibkraft - Google Patents

Method for determining the position of an initiation point of a Auftreibkraft Download PDF

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Publication number
AT517832A4
AT517832A4 ATA50045/2016A AT500452016A AT517832A4 AT 517832 A4 AT517832 A4 AT 517832A4 AT 500452016 A AT500452016 A AT 500452016A AT 517832 A4 AT517832 A4 AT 517832A4
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AT
Austria
Prior art keywords
mold
clamping unit
mold clamping
force
determining
Prior art date
Application number
ATA50045/2016A
Other languages
German (de)
Other versions
AT517832B1 (en
Inventor
Ing Steinparzer Helmut
Poettler Andreas
Dipl Ing Zeidlhofer Herbert
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Engel Austria Gmbh
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Filing date
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Application filed by Engel Austria Gmbh filed Critical Engel Austria Gmbh
Priority to ATA50045/2016A priority Critical patent/AT517832B1/en
Application granted granted Critical
Publication of AT517832A4 publication Critical patent/AT517832A4/en
Publication of AT517832B1 publication Critical patent/AT517832B1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, controlling or regulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, controlling or regulating
    • B29C45/7653Measuring, controlling or regulating mould clamping forces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, controlling or regulating
    • B29C45/80Measuring, controlling or regulating of relative position of mould parts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76003Measured parameter
    • B29C2945/76083Position
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76177Location of measurement
    • B29C2945/76224Closure or clamping unit
    • B29C2945/76234Closure or clamping unit tie-bars
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76344Phase or stage of measurement
    • B29C2945/76381Injection

Abstract

Method for determining the position (x, y) of an initiation point (A) of a abutment force of a mold (1) of a mold clamping unit (2) during an injection process of a molding compound into the mold (1), wherein the mold (1) is attached to mutually movable mold platens ( 3, 4) of the mold clamping unit (2) is clamped and wherein the mold clamping unit (2) at least two, in particular four, spars (5, 6, 7, 8), which pass through the mold mounting plates (3, 4), wherein determining the Position (x, y) of the introduction point (A) of the Auftreibkraft (FA) in response to changes in position of the at least two spars (5, 6, 7, 8) relative to one of the mold mounting plates (3, 4).

Description

The invention relates to a method for determining the position of an initiation point of a Auftreibkraft (hereinafter referred to as FA center of gravity) of a mold of a mold clamping unit during an injection process of a molding material in the mold, wherein the mold is clamped to mutually movable mold clamping plates of the mold clamping unit and wherein the mold clamping unit has at least two, in particular four, spars, which pass through the mold mounting plates. In addition, the invention relates to a mold clamping unit for a molding machine, in particular injection molding machine, with two platens, a mold, which is clamped to the platens, at least two, in particular four, bars, which pass through the platens, and a determination device for determining the position of a FA Center of gravity of the mold during an injection process of a molding material in the mold.
In the production of moldings, in particular injection molded components, it is essential to pressurize the mold with a corresponding closing force so that the melt pressure acting within the mold does not lead to an undesirable opening of the mold. Usually, the mold is designed so that the closing force must act evenly on the mold. In other words, the center of gravity (i.e., the point of introduction of a force or the points of introduction of forces) lies at the center of the cross-sectional area of the injection mold and in the center of the mold platens of the injection molding machine.
Now it is the case that during injection molding in the mold two different forces act against each other. On the one hand, there is the Auftreibkraft, which results from the injection of the molding material in the mold. That is, this molding compound, due to the injection pressure, tries to "push" or force apart the mold halves of the mold. The center of gravity of this Auftreibkraft (FA-center of gravity) can be synonymous as the point of initiation of the Auftreibkraft (as it is specified in the claims) are called. On the other hand, there is also the closing force, which over the
Form platens is applied to the mold. In particular, this closing force is introduced into the mold via the moving mold clamping plates. More details can be found above all in AT 515 662 B1, according to which the extent of the inclination of the mold clamping plates to each other by changing the position of a force application point is specified. This force introduction point corresponds to an initiation point of the closing force (hereinafter referred to as FS center of gravity, in the claims equal to the point of introduction of the closing force).
In the case of injection molding, the case repeatedly arises that the FA center of gravity is relatively far away from the FS center of gravity due to a special shape of the cavity or due to a non-central attachment of the molding tools to the mold mounting plates. Thus, the moldings can not be manufactured in the desired quality, since the force is introduced unevenly into the mold. In the worst case, it can lead to even the mold "breathing", whereby molding compound can at least slightly escape from the cavity. For this reason, it makes sense to adapt the FS center of gravity of the clamping force of the platens as far as possible to the FA center of gravity.
For this purpose, EP 2 361 747 A1 describes a device and a method, according to which a regulating device controls the oil supply based on a closing force. It proposes to use a melt flow analysis to determine the center of gravity of the mold opening force and to determine a clamping force distribution from this.
The disadvantage of this solution is that carrying out the melt flow analysis is difficult and very expensive. In practice, the necessary data and resources are often not available.
The object of the present invention is therefore to provide a comparison with the prior art improved method or an improved mold clamping unit. In particular, the above-mentioned disadvantages should be eliminated.
This is achieved by a method having the features of claim 1. Accordingly, the invention provides that the determination of the position of the FA center of gravity takes place as a function of changes in position of the at least two spars relative to one of the platens. Thus it can be deduced from measured position values of at least two spars relative to one of the platens on the FA focus.
In principle, this makes it possible for position changes to be determined from empirical values of previous injection cycles. However, it is preferably provided that a separate test cycle is performed. This can be done according to a preferred embodiment in that when determining the position of the FA center of gravity during the injection step, a closing force of the mold clamping unit is reduced until a change in position on at least one spar, preferably at least two bars, more preferably at all four bars, is determined relative to one of the platens. By way of example, reference may be made to AT 006 468 U1 for such a reduction. Above all, since the FA center of gravity can migrate or migrate until the cavity has been completely filled, a temporal FA center of gravity profile during the injection process is preferably determined.
It is possible that the position values are used to directly refer to the FA center of gravity. Preferably, however, it is provided that, when determining the position of the FA center of gravity, a force value for each of the bars is calculated from the ratios of individual position changes.
In order to obtain an even more meaningful result with regard to the FA center of gravity, it is preferably provided that each force value is calculated by determining from the changes in position and at least one additional measured value the deformation of at least two bars caused by the closing force, from the ratios of Deformation coefficients a force value is calculated for each of the spars. In this case, it is additionally preferably provided that the at least one additional measured value originates from a strain gauge and / or a force sensor and / or a pressure sensor. For example, reference may be made to AT 515 939 B1, according to which the deformation of the mold clamping unit and the tool parts for different values of the closing force is calculated from certain measured values. For the detection of the change in position is provided that each change in position of a Flolmes is detected relative to one of the platens of one, preferably arranged at one end of each Flolmes Wegmesssensor. For the Flolme is preferably provided that they are designed as tie rods. In principle, it may be sufficient if only two or three such flols are part of the mold clamping unit. Particularly preferred but four Flolme are provided.
Having provided with the present invention a simplified method for determining the location of an FA center of gravity, this method can be used as a basis for a method of determining a location of an FS center of gravity of relatively movable mold platens of a mold clamping unit. Accordingly, it is preferably provided that the position of the FS center of gravity is determined as a function of a method according to the invention for determining the location of the FA center of gravity. Particularly preferably, the FS center of gravity is adapted as far as possible to the FA center of gravity. This FS center of gravity setting can be independent of a production cycle. This means that once an FA focus has been determined, the FS focus can then be determined depending on it. Above all, if the FA focus moves during the injection process, the FS center of gravity should also migrate accordingly and thus create a temporal FS center of gravity course.
The fixed FS center of gravity can then be used in a method for fierstellen a molding in a mold of a mold clamping unit.
In this case, each Flolm associated with a Schließkraftaufbringungsvorrichtung over which the force acting on the mold closing force is applied, each Schließkraftaufbringvorrichtung is driven in dependence on the predetermined position of the FS center of gravity. FHierbei is of course a corresponding
Control possible to the effect that just this FS focus mitwandert according to the FA focus. For this purpose, the individual Schließkraftaufbringvorrichtungen must be controlled differently over time.
In general, it can be stated that the FS center of gravity can be defined as the mean of all positions at which a force is introduced into the platens or into a mold clamping plate, wherein each position is weighted with the force acting there. In other words, the FS center of gravity corresponds to the end point of the resulting torque vector of the force introduced via the individual cylinders (when opening or embossing) into the movable platen.
However, protection is desired not only for a method of detecting the location of an FA center of gravity but also for a mold clamping unit of a molding machine, the above object being achieved by a mold clamping unit having the features of claim 10. Accordingly, it is provided that the determining device is designed to perform the determination of the FA center of gravity as a function of changes in position of the at least two spars relative to one of the platens.
Particularly preferably, it is provided in such a mold clamping unit that the mold clamping unit has a control or regulating unit and the determining device is part of the control or regulation unit or is signal connected to the control unit, wherein the determination of the position of the FA center of gravity in a determination mode of Control or regulation unit (or the determination device) takes place. This determination mode can thus be turned on, especially when first filling a new form. In other words, as soon as a new molding tool is used in an injection molding machine, a filling of the molding tool is first carried out in one or more test cycles. During the filling with molding compound, the position (two-dimensional coordinate position) or the wandering of the position of the FA center of gravity is determined in the determination mode accordingly. This can be done mainly by the fact that the
Mold-closing unit has at least two, each one Holm associated Wegmesssensoren, wherein the Wegmesssensoren position changes of the respective spar relative to one of the mold mounting plates are detected.
Furthermore, it is preferably provided that the mold clamping unit has at least two Schließkraftaufbringvorrichtungen, which are each associated with one of the at least two spars and over which the force acting on the mold closing force can be applied. For a simple determination, it is provided that the Schließkraftaufbringvorrichtungen in the determination mode of the control or regulating unit can be controlled to reduce the closing force of the mold closing unit until the Wegmesssensoren a change in position at one, preferably at least two, more preferably at all four, Holmen relative to one of the platens is detectable. This position change measurement via the distance measuring sensors can take place over an entire injection cycle. Of course, this can only be done with a fully filled mold cavity, to determine where the FA focus is on filled molds.
Preferably, however, the migration of the FA center of gravity can be determined over time. In particular, the determination is carried out in that the control or regulating unit is designed to calculate a force value for each of the spars when determining the position of the FA center of gravity from the ratios of individual position changes.
As with the method described above, the determined position of the FA center of gravity can also be used for further steps in the mold clamping unit. In particular, it is provided that the control or regulating unit is designed such that in a fixing mode the position of an FS center of gravity of the relatively movable platen can be determined depending on the determined in the determination mode position of the FA center of gravity, preferably to the position of the FA Emphasis is customizable.
Also, the position of the FS center of gravity determined in this setting mode can then be further used by each in a manufacturing mode during the production of moldings in the mold
Schließkraftaufbringvorrichtung of the control or regulating unit for determining the introduced across the respective strut closing force in response to the fixed in the setting mode position of the FS center of gravity can be controlled. Thus, a molded part can be produced, which is applied as uniformly as possible and centrally with clamping force of the platens during manufacture. So there is no or only the smallest possible uneven application of force to the molding in the cavity of the mold.
Further details and advantages of the present invention will be explained in more detail below with reference to the description of the figures with reference to the exemplary embodiments illustrated in the drawings. Show:
1 shows schematically a platen with central mold and central cavity,
2 shows schematically a platen with central mold and decentralized cavity,
3 shows a platen with decentralized mold and central cavity,
Fig. 4 shows schematically a mold clamping unit and Fig. 5 shows a platen with Holmen and a control and regulating unit.
FIG. 1 shows a cross section of a mold closing unit 2 in the region of a molding tool 1. This mold 1 is clamped to a platen 3 and 4 respectively. This platen 3 and 4 is penetrated by four bars 5, 6, 7 and 8, which are respectively arranged in the corner regions. In the mold 1, a cavity 14 is formed, in which molding material is injected by an injection device, not shown, from which after curing, a molded part 13 is formed. The circle in the middle of the cavity 14 illustrates the FA center of gravity A. The position of this FA center of gravity A is determined by the position coordinates x, y. In a simplified way, these position coordinates x, y lie in a plane which is in the
Essentially corresponds to the parting line. Theoretically, a third dimension could be used here for the exact position of the FA center of gravity A, but it is sufficient for the determination of the FA center of gravity A to know the position of the central FA center of gravity A in one plane. The FS center of gravity L is also located in this plane, whereby here too the position is determined by the position coordinates x, y. If the same closing force FS is introduced into the platens 3, 4 and into the forming tool 1 over all bars 5 to 8, then this FS center of gravity L lies exactly in the center between the bars 5 to 8, d. H. at the intersection of the two lines shown. If different closing forces FS are introduced to the bars 5 to 8, this FS center of gravity L can migrate. Such wandering in the parting plane is described in detail in AT 515 662 B1.
Due to the design, there are situations in which the FA center of gravity A does not lie in the center of the cross-sectional area. Reasons for this may be special asymmetric component shapes (see FIG. 2) or additionally attached to the mold 1 devices 19 (see Fig. 3), which prevent central attachment of the mold 1 to the platens 3, 4 of the injection molding machine. The asymmetrical component shape or shape of the cavity 14 in FIG. 2 causes the FA center of gravity A, the abutment force FA produced by the melt (molding compound), not in the center of the cross-sectional area of the molding tool 1 and thus also not in the center of the mold mounting plates 3, 4 lies.
According to FIG. 3, the devices 19 attached to the mold 1 prevent central attachment of the mold 1 to the platens 3, 4. Again, the FA center of gravity A of the Auftreibkraft FA resulting from the melt is not in the center of the mold platens 3, 4 of the mold clamping unit second
In Fig. 4, the entire mold clamping unit 2 is shown in a side view, which corresponds to a two-plate machine. Of course, this can also be used in a three-plate machine. Anyway, the two will
Platen 3, 4 of this form-locking unit 2 of a total of four bars 5 to 8 passes through. On the platens 3, 4, a respective mold half 15,16 is clamped, which together form the mold 1. The closed mold 1 forms the cavity 14, in which a molding compound is injected via an injection device, not shown, which then hardens the molding 13. When injecting the Auftreibkraft FA from the molding compound acts on the mold 1. To apply the Auftreibkraft FA opposite closing force FS on the mold mounting plates 3, 4 and subsequently on the mold 1, Schließkraftaufbringvorrichtungen 10 are provided. In this case, these Schließkraftaufbringvorrichtungen 10 from a pressure pad 18 and a locking device 17 together. When applying the closing force the mold mounting plates 3, 4 are moved to each other, while at the same time stretch the bars 5 to 8. The relative movement or the change in position of at least the platen 3 relative to the bars 5 to 8 is measured via distance measuring sensors 9.
In detail, it can be seen in FIG. 5 that position values P of the respective spars 5 to 8 are forwarded to a determination device 11 by the distance measuring sensors 9. This determination device 11 is in this case signal-technically connected to the control or regulation unit 12, but may in principle also be part of this control or regulation unit 12. In a determination mode E of this determination device 11, the position x, y of the FA center of gravity A is then determined from the incoming position values P (possibly via the intermediate step of determining a force value K). This can also be done via additional measured values of force sensors, pressure sensors or strain gauges, not shown. In particular, the determination of the position x, y of the FA center of gravity A is effected as a function of these position changes of the at least two bars 5 to 8 relative to the platen 3. In a determination mode F of the control unit 12, the FS center of gravity L is subsequently determined established. In particular, the position x, y of the FS center of gravity L is adapted to the position x, y of the FA center A determined in the determination mode E. In a subsequent production mode H of the control unit 12, the closing force application devices 10 are controlled in dependence on the previously determined FS center of gravity L or the time FS center of gravity profile. As a result, in each injection process, the position x, y of the FS center of gravity L substantially coincides with the position x, y of the center of gravity A of the FA. The determination mode E and the determination mode F are to be regarded as logically different modes, which however can also be implemented in a single step or a common program of the control or regulation unit 12. The same applies to the at least logically separate production mode H.
In other words, the invention can be expressed again as follows:
It is generally important that an asymmetry of the injection molding component (molding 13) or an asymmetric arrangement of the molding tool 1 can be concluded.
In the method for determining the asymmetry of the molded part 13, the closing force FS is reduced as a first step until a change in the position values P on the uprights 5 to 8 during the injection process is detected. This lowering of the closing force FS can be triggered by the control unit 12 driving the Schließkraftaufbringvorrichtungen 10 accordingly (see Fig. 5). Subsequently, a force coefficient is calculated from the ratios of the individual position changes to each other. Simplified, the calculation works in such a way that a large force value is assigned to a spar 5 to 8 (drawbar) with a large change in position and a small force value to a pull rod with a small change in position.
In the method for ascertaining the asymmetry of the molding tool 1, the steps for determining the deformation are first of all carried out, wherein the position and force actual values of the individual tie rods are stored and a deformation coefficient per tie rod is determined. Then, a force coefficient is calculated from the ratio of the individual deformation coefficients to each pull rod. Simplified, the calculation works so that a
Drawbar with small deformation, a high force value and a pull rod with great deformation a low force value is supplied.
In the further production run of the injection molding machine, the individual tie rods are subjected to the force values thus determined. The result is that the center of gravity of the closing force FS (FS center of gravity L) with that of the Auftreibkraft FA the melt (FA focus A) largely coincide. It is thus an unwanted slanted position of the mold halves 15, 16 prevents each other. However, a desired skewing (eg during embossing) can certainly also be carried out in the case of a mold closing unit 2 described here.
Innsbruck, January 28, 2016

Claims (17)

  1. claims
    1. A method for determining the position (x, y) of an initiation point (A) of a Auftreibkraft (FA) of a mold (1) a mold clamping unit (2) during an injection process of a molding material in the mold (1), wherein the mold (1) on mutually movable mold mounting plates (3, 4) of the mold clamping unit (2) is clamped and wherein the mold clamping unit (2) at least two, in particular four, spars (5, 6, 7, 8), which pass through the mold mounting plates (3, 4) , characterized in that the determination of the position (x, y) of the introduction point (A) of the Auftreibkraft (FA) in response to changes in position of the at least two spars (5, 6, 7, 8) relative to one of the platens (3, 4 ) he follows.
  2. 2. The method of claim 1, wherein in determining the position (x, y) of the introduction point (A) of the Auftreibkraft (FA) during the injection process, a closing force of the mold clamping unit (2) is gradually reduced until a change in position on at least one spar (5 , 6, 7, 8), preferably on at least two spars (5, 6, 7, 8), particularly preferably on all four spars (5, 6, 7, 8), relative to one of the platens (3, 4) becomes.
  3. 3. The method according to claim 2, wherein, when determining the position (x, y) of the point of introduction (A) of the Auftreibkraft (FA) from the ratios of individual position changes, a force value (K) for each of the spars (5, 6, 7, 8 ) is calculated.
  4. 4. Method according to claim 3, wherein each force value (K) is calculated by determining, from the position changes and at least one additional measured value, the deformation of at least two bars (5, 6, 7, 8) caused by the closing force Ratios of deformation coefficients a force value (K) for each of the spars (5, 6, 7, 8) is calculated.
  5. 5. The method of claim 4, wherein the at least one additional measured value originates from a strain gauge and / or a force sensor and / or pressure sensor.
  6. 6. The method according to at least one of the preceding claims, wherein each change in position of a spar (5, 6, 7, 8) relative to one of the platens (3, 4) of one, preferably at one end of each spar (5, 6, 7 , 8) arranged, Wegmesssensor (9) is detected.
  7. 7. The method according to at least one of the preceding claims, wherein the at least two spars (5, 6, 7, 8) are designed as tie rods.
  8. 8. A method for determining a position (x, y) of an introduction point (L) of a closing force (FS) of relatively movable platens (3, 4) of a mold clamping unit (2), wherein the position (x, y) of the point of introduction (L) the closing force as a function of the determined in a method according to at least one of the preceding claims position (x, y) of an introduction point (A) of the Auftreibkraft (FA) in one of the mold mounting plates (3, 4) clamped mold (1) fixed, preferably at the introduction point (A) of the Auftreibkraft (FA) is adjusted.
  9. 9. A method for producing a molded part in a mold (1) of a mold clamping unit (2), wherein the mold (1) is clamped to mutually movable mold mounting plates (3, 4) of the mold clamping unit (2) and wherein the mold clamping unit (2) at least two , in particular four, spars (5, 6, 7, 8) passing through the mold platens (3, 4), wherein each bar (5, 6, 7, 8) is associated with a Schließkraftaufbringvorrichtung (10) over which the on closing force acting on the mold (1) is applied, wherein each Schließkraftaufbringvorrichtung (10) depending on the set in a method according to claim 8 position (x, y) of the introduction point (L) of the closing force (FS) is driven.
  10. 10. mold clamping unit (2) for a molding machine, in particular injection molding machine, with - two mold platens (3, 4), - a mold (1) which is clamped to the mold mounting plates (3, 4), - at least two, in particular four, Flolmen (5, 6, 7, 8), which pass through the platens (3, 4), and - a determination device (11) for determining the position (x, y) of an introduction point (A) of a Auftreibkraft (FA) of the molding tool (1 during an injection process of a molding compound into the molding tool (1), characterized in that the determination device (11) is designed to determine the introduction point (A) of the abutment force (FA) as a function of changes in position of the at least two rails (5, 6 7, 8) relative to one of the platens (3, 4).
  11. 11. mold clamping unit according to claim 10, wherein the mold clamping unit (2) has a control or regulating unit (12) and the determining device (11) is part of the control or regulating unit (12) or connected to the control or control unit (12) signal technically wherein determining the position (x, y) of the initiation point (A) of the abutment force (FA) is in a detection mode (E) of the control unit (12).
  12. 12. The mold clamping unit according to claim 1, wherein the mold clamping unit has at least two path measuring sensors (9), each associated with a spar (5, 6, 7, 8), the position measuring changes of the respective rail being determined by the distance measuring sensors (9). 5, 6, 7, 8) relative to one of the platens (3, 4) are detectable.
  13. 13. The mold clamping unit according to at least one of the preceding claims, wherein the mold clamping unit (2) has at least two Schließkraftaufbringvorrichtungen (10) which are each associated with one of the at least two spars (5, 6, 7, 8) and on which the on the mold ( 1) acting closing force (FS) can be applied.
  14. 14. mold clamping unit according to at least one of the preceding claims, wherein the Schließkraftaufbringvorrichtungen (10) in the determination mode (E) of the control or regulating unit (12) are controllable to reduce the closing force of the mold clamping unit (2) until the Wegmesssensoren (9) a position change on at least two, preferably on all four, bars (5, 6, 7, 8) relative to one of the mold mounting plates (3, 4) can be determined.
  15. 15. A mold clamping unit according to claim 14, wherein the control unit (12) is designed to determine a force value (K) from the ratios of individual position changes when determining the position (x, y) of the point of introduction (A) of the abutment force (FA). for each of the spars (5, 6, 7, 8).
  16. 16. The mold clamping unit according to at least one of the preceding claims, wherein the control unit (12) is configured such that in a set mode (F) the position (x, y) of an initiation point (L) of the closing force (FS) of the relative to each other movable mold clamping plates (3, 4) depending on the determined in the determination mode (E) position (x, y) of the introduction point (A) of the Auftreibkraft (FA) fixable, preferably to the position (x, y) of the introduction point (A) of the Auftreibkraft (FA) customizable is.
  17. 17. A mold clamping unit according to at least one of the preceding claims, wherein in a manufacturing mode (H) during the manufacture of moldings (13) in the mold (1) each Schließkraftaufbringvorrichtung (10) of the control unit (12) for fixing the over the respective spar (5, 6, 7, 8) initiated closing force (FS) in dependence on the set in the setting mode (F) fixed position (x, y) of the introduction point (L) of the closing force can be controlled. Innsbruck, January 28, 2016
ATA50045/2016A 2016-01-28 2016-01-28 Method for determining the position of an initiation point of a Auftreibkraft AT517832B1 (en)

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DE102017000239.8A DE102017000239B4 (en) 2016-01-28 2017-01-12 Method for determining the position of an introduction point of a driving force or a closing force in a mold clamping unit, method for producing a molded part by means of a mold clamping unit and mold clamping unit for a molding machine

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0459947A2 (en) * 1990-05-31 1991-12-04 K.K. Holding Ag Bar tension measuring system in for example injection moulding machines
US20050226958A1 (en) * 2004-04-13 2005-10-13 Toshiba Kikai Kabushiki Kaisha Mold clamping apparatus and molding machine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1373126A (en) 1971-12-29 1974-11-06 Plast Elastverarbeitungsmasch Hydraulic circuits
AT6468U1 (en) 2002-10-24 2003-11-25 Engel Austria Gmbh Method for operating an injection molding machine
JP5460999B2 (en) 2008-11-05 2014-04-02 三菱重工プラスチックテクノロジー株式会社 Clamping device
JP5380183B2 (en) 2009-07-06 2014-01-08 三菱重工プラスチックテクノロジー株式会社 Clamping device for injection compression molding machine and injection compression molding device
AT515662B1 (en) 2014-08-28 2015-11-15 Engel Austria Gmbh Method for producing a molded part
AT515939B1 (en) 2014-10-24 2016-01-15 Engel Austria Gmbh Mold clamping unit and method of operating the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0459947A2 (en) * 1990-05-31 1991-12-04 K.K. Holding Ag Bar tension measuring system in for example injection moulding machines
US20050226958A1 (en) * 2004-04-13 2005-10-13 Toshiba Kikai Kabushiki Kaisha Mold clamping apparatus and molding machine

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AT517832B1 (en) 2017-05-15
DE102017000239B4 (en) 2020-06-18

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