EP3310508A1 - Method and device for producing mould material moulds for the casting of metals - Google Patents
Method and device for producing mould material moulds for the casting of metalsInfo
- Publication number
- EP3310508A1 EP3310508A1 EP16731979.7A EP16731979A EP3310508A1 EP 3310508 A1 EP3310508 A1 EP 3310508A1 EP 16731979 A EP16731979 A EP 16731979A EP 3310508 A1 EP3310508 A1 EP 3310508A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- force
- molding material
- molding
- distance
- box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 32
- 238000005058 metal casting Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims description 50
- 238000004519 manufacturing process Methods 0.000 claims abstract description 23
- 230000008859 change Effects 0.000 claims abstract description 22
- 239000012778 molding material Substances 0.000 claims description 139
- 238000000465 moulding Methods 0.000 claims description 109
- 238000003825 pressing Methods 0.000 claims description 86
- 238000007906 compression Methods 0.000 claims description 51
- 230000006835 compression Effects 0.000 claims description 34
- 238000005056 compaction Methods 0.000 claims description 30
- 230000008569 process Effects 0.000 claims description 19
- 238000005259 measurement Methods 0.000 claims description 16
- 238000012937 correction Methods 0.000 claims description 13
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 238000005266 casting Methods 0.000 claims description 10
- 230000006870 function Effects 0.000 claims description 3
- 230000000284 resting effect Effects 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 2
- 230000004044 response Effects 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract 2
- 239000004576 sand Substances 0.000 description 18
- 238000009434 installation Methods 0.000 description 7
- 230000035515 penetration Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000003110 molding sand Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 238000000280 densification Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000006399 behavior Effects 0.000 description 2
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- 230000001627 detrimental effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
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- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
- B22C15/02—Compacting by pressing devices only
- B22C15/08—Compacting by pressing devices only involving pneumatic or hydraulic mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C19/00—Components or accessories for moulding machines
- B22C19/04—Controlling devices specially designed for moulding machines
Definitions
- Shaped form with a predetermined or predefinable minimum strength for metal casting In this case, a molding material is entered in a molding box and the
- the compaction takes place according to the invention in two steps, a first step in which the molding box is moved over a first path to a stop with a pressing head and a second step in which the molding material is moved over a second path to an end position and thereby further compressed.
- a length of the second path is dependent on a nature of the molding material.
- Moldings or molding materials that are used in the production of form molds for metal casting have on the side of the force introduction after the
- the differences in the dimensional stability are proportional to the forces acting on the respective areas. This effect is due to the fact that the forces are transferred from the force-introducing side at the angle of repose of the molded material to be compacted. That is, the forces are proportionally based on lateral boundaries by friction, for example on a mold box wall or on upright or upstanding model contours.
- the quality improvement of the molding material forms achieved by the densification, that is, the resulting better compaction of the material in areas away from the introduction of force, but have not led to a konsta nten dimensional stability or quality of the molding materials, which is desirable to durable products of high quality to produce with a small scrap.
- Forming chamber is compressed and the desired molding (casting) is formed.
- Compaction (referred to in paragraph [043] secondary compaction) to distinguish what is found there in claim 5.
- the pressure sensor causes switching from primary compression to secondary compression.
- the object of the invention (s) is to produce better molds for metal casting and not to increase the complexity of the production. "Better" can be rewritten so that it is permanently, even with change or change of quality, at least one of several properties of the molding material, an equally hard on the surface form of the molding material.
- the claimed two-stage method has a first step and a second step and for the second step there is a second path which is set according to the third feature, respectively, is changed.
- a change is required when a property of the sand changes. Does not change anything on the sand, no control intervention is provided. This is the so-called "steady state" of the given controlled system.
- a measurement of a preceding compression operation has an influence on the next compression operation (or one of the following compression operations).
- the claimed inventions (claim 1, 20, 26) work as a working method in each case completely different than the prior art.
- a different setpoint is provided, namely the force determined for the quality and hardness of the shape of a previous impression, and it paves the way for subsequent impressions given prior to raising the model plate as a second distance.
- the second distance is set or the person skilled in the art would say “is set” (according to claim 15), when the molding box abuts the top of the pressing head. Then there is virtually no further upward movement for the bottom-pressing device. Then, the movement is performed (second step in claim 1), (only) the model plate is further moved upwards by the pressing device, the molding box itself can not be moved further, but the model plate is moved a second distance to have a target , namely the lower edge of the molding box.
- This second distance (claim 1, last feature) is adjusted depending on a force.
- This force is representative of the hardness of the mold on the surface and is used by the invention as a reference variable, from which the necessary path in the second impression results. In itself, it is a strength or hardness control of
- the route guidance therefore has a dual aspect, a force must be achieved, and this force must be achieved at a time when the model plate reaches the bottom edge of the molding box. In addition, this must be carried out with repeated accuracy. If the person skilled in the art understands the problem differently and starts from different sands which have a different path-force characteristic, the invention results in the necessity of changing the path so that the force (hardness or strength) at the end of the compaction is appropriate. If the skilled person worked differently and regulated only one force, the path would not be correct if he assumed changes in the properties of the under-compacted molding material (molding sand). According to the invention both objectives are achieved and as a basis the invention uses the or one of the preceding measurements of the force at the end of the associated compression.
- Result oriented can be said that the power can be too high, if the
- the invention can be viewed from several directions, and it is not obvious from the prior art if the prior art also orientates the matching of the pattern plate to the bottom or bottom of the molding box as the end of its process. For the production of a reasonable or useful form, this is absolutely necessary, but how this need is achieved according to the invention is different, and indeed fundamentally different from the way DE 602 17 205 T2 proposes to do so.
- the molding material In the granular, flowable molding material (also molding sand, molding material, later simplifying "molding material”), from which the molding material forms are produced for metal casting, it is usually Betonit bonded molding materials, also called “sand".
- the molding material is used repeatedly in a cycle, whereby the starting material may be formed over time with, for example, core or green sand (new sand), from the insert core (s) for the castings to be produced, and fines such as crushed sand grains. not in one
- This mixture of pure molding material, green sand or used core sand and fines alters the property of the molding material.
- the molding material can also have a different particle size distribution, which has an immediate effect on how much force has to be applied to the To compress molding material to a target value.
- the molding material properties of a material batch are determined using a standard test. In this test, a standard container is filled with material and compacted by means of a punch with a predetermined force. The penetration depth of the punch into the standard container is measured when the predetermined force is reached.
- the measured value that is the distance that the plunger penetrates into the standard container, is the value that is set in prior art systems as a constant value for the recompression of the molding material molds made from the material of the one material batch.
- FIG. 1 shows the result of several measurements of
- Molding material of a material batch It is easy to see that with a given force of 3,000N, with which the punch is pressed into the standard container, the penetration depth of the punch into the standard container varies between approx. 12 mm and more than 50 mm.
- An invention relates to the method for producing a molding material for metal casting with a predetermined minimum strength of the mold.
- molding material granular molding material
- the compaction takes place in two steps.
- the molding box with the filled molding material is moved by a pressing device over a first path for abutment against a pressing head.
- the pressing head is usually arranged above the molding box, so that the molding box is pressed from below against the pressing head.
- the pressing head may have a punch or multi-punch, which protrudes from the pressing head in the direction of the molding box.
- the ram or ram will hold in a predetermined position during the first step and, in that position, will penetrate into the molding material previously filled in the molding box during the first step.
- the stamp or the multi-stamp can be actively pressed in the direction of the mold box during the first step.
- the pressing device by the pressing device over a second distance in an end position for hardening or compaction (creation) of the molding material moves.
- the second distance is varied depending on the nature of the molding material, in particular for each mold box preferably adjusted automatically depending on the composition of the molding material.
- the new setting of the current process of compaction results from the measurement of the force of the previous one
- Adjustment of the path to cause, if there is a deviation in at least one property of the molding material. This is the meaning of a regulation that only intervenes when an adjustment is required, ie a control difference was measured.
- the regulation thus achieves both, the adjustment of the force at the end of the compaction, which force determines the quality of the form (its hardness at the surface). And the hub, which is necessary to reach the lower edge of the molding box, at least in
- the scheme is still functional, has only an internal inserted runtime (a dead time in the sense of regulation).
- the strength is measured on the first compacted mold, but only used as a controlled variable for the fourth mold to be compacted.
- There are two molded boxes between measuring and changing the distance for the upcoming compression box 4 is measured, boxes 3 and 2 in between, box 1 is being compacted and this is the measurement of box 4 and its Formstoffform used). Then box 3 is measured and affects box 0, etc.
- the punch or punch of the punch may be held or moved as described in the first step. After completion of the second step, which heals after completion of a pressing stroke of the pressing device, the punch or the multi-punch can be pressed with an increased pressure in the molding material.
- the molding box in a continuous movement passes through the first path and the second path.
- the setting of the second path can be done before the movement of the model plate respectively the second movement of the pressing device starts and / or while the molding box moves along the first path.
- the compression of the molding material by the pressing device and / or the pressing head can be determined or measured in particular by means of at least one sensor or a pressure sensor.
- the sensor may be located in or near a shape-critical region of the molding material mold.
- the sensor may, for example, be part of the molding box, in particular integrated into an inner wall of the molding box so that it immediately detects the pressure transferred to the molding material at this point or in this area. For larger castings or castings with complicated geometry, multiple sensors may be present at appropriate critical locations.
- the or a sensor may alternatively be an optical sensor which measures the densification of the molding material in a region within the molding material; For example, a laser sensor, whose penetration depth is adjustable in the material.
- one or the sensor may be a sonic pulse sensor, such as sonar, that detects a degree of material compaction in the molding material molding or a portion of the molding compound by means of sound waves. Measured by the pressure sensor, introduced into the molding compound force is converted into a signal that is fed via cable or cable-free control.
- the control can be a central control of the molding plant, preferably a local control with which the received signals can be processed faster than in the standard controls of the molding plants, some of which are already 30 years old.
- the controller may have a storage medium in which a setpoint or limit values of a setpoint range for the measured introduced force are stored.
- a stored in the controller for example, in a computer program can
- Limit values in the control respectively the storage medium can be stored as comparison values for the current actual value measurement.
- this deviation can be determined by an algorithm
- Correction value can be calculated. This correction value can then be converted into a signal
- the signal can be converted and the signal can be sent to an actuator of the molding plant, which changes a length of the second path, that is, the second
- the second path can be adjusted independently of the size of the deviation by a predetermined path length, for example 0.5mm, 1mm, 1.5mm or any other distance. That is, the actuating signal gives only one direction of an adjusting movement of the actuator and possibly a number of necessary
- the controller may determine the path length change depending on the calculated correction value, that is, the actuating signal in this case indicates a direction of the adjusting movement of the actuator and a measure of the adjusting movement of the actuator.
- the predetermined setpoint or setpoint range may be a value entered by an operator into the controller or a corrected value set by the controller during production or production for the controller
- Form of molding material was determined, which was produced immediately before the current measurement.
- the latter means that at the start of the production of the molding material forms, that is, before the beginning of the compression of the first molding material of a production, a setpoint is entered into the controller. This setpoint is then compared in the control with the actual measured value of the first molding material form and possibly corrected. The measured actual value or the corrected value calculated by the controller then serve as the actual value of the second molding material of the same production as a predetermined target value, etc. The measured actual value or the value then serves for the nth molding material of the current production the controller calculates the correction value for the n-th molding material shape as the nominal value with which the actual value measurement of the n-th molding material mold is compared.
- the correction value can also be determined from information about the molding material for the molding material currently to be produced.
- the molding material can be scanned during filling in the molding box, so that a minimum, average and maximum grain size of the molding material and their volume fraction can be determined in the molding material.
- a force can be calculated, which is necessary in order to produce a molding material form with a predetermined strength.
- Values such as the temperature and the humidity can also be included in the calculation if, as described above, the registered force is determined by means of a sensor.
- Another invention relates to a molding machine for casting molds from a granular molding material (molding material), for example, concrete-bonded molding sand, for metal casting.
- a molding material for example, concrete-bonded molding sand, for metal casting.
- the molding equipment comprises a linearly movable pressing device for applying pressure to the resulting molding material or mold, comprising a molding box for receiving the mold and a filling frame for receiving an upper portion of molding material for the mold.
- the molding plant further comprises a pressing head with at least one
- Shaping stamp which may comprise a decoupled from the drive of the pressing device drive.
- the pressing head is disposed in a closing direction of the pressing device before (usually below) the molding box and is not moved by the pressing device. That is to say, when closing (the beginning of compacting), the pressing device closes the (filled) molding box, move the filling frame, the plate carrier together with the model resting on the press head. When the filling frame reaches the frame of the press head, the molding box remains stationary. Then the model plate with the model is moved relative to the mold box until it reaches its bottom edge. That is a necessary condition, at least this must be essentially fulfilled.
- the molding material should be flush with the lower edge of the molding box.
- the pressing head comprises at least one, preferably a plurality of forming dies distributed on the inner surface of the molding box, the at least one forming punch being fixed in position relative to the molding box, or the forming punch being actively pressed by a drive into the molding material for the mold to be compacted the molding box is moved against the pressing head and / or after the molding box comes into abutment with the pressing head.
- the pressing head comprises more than one forming die, wherein the plurality of forming dies can form a multi-stamp.
- the molding installation further comprises an actuator coupled to the pressing device or the molding box with a linear drive which is decoupled from a drive of the pressing device.
- the possible effective directions of the linear drive of the actuator and the drive of the pressing device can be rectified.
- the fact that the linear drive of the actuator is decoupled from the drive of the pressing device, means in particular that the actuator relative to the pressing device linear in and against the possible
- Movement direction of the pressing device can be moved.
- a controller sets a distance (si) between the pressing device (2) and the molding box via the actuator when the molding box is in abutment against the pressing head or a frame of the pressing head.
- This "if” is not in the sense of a temporal assignment in the claimed molding machine to read (claim 15). It is the possibility to have this setting when the compaction is done afterwards.
- the change can also be made by the concern with the press head or a frame of the press head, it can be adjusted even at the first stroke, so has a whole temporal range, only a structural end, to which it should be adjusted as late as possible To have an effect.
- An adjustment of the actuator can be between 20mm and 100mm, preferably the adjustment is between 30mm and 90mm, more preferably between 40mm and 80mm.
- the adjustment depends on the height of the molding box or the size of the filler or of the mold to be produced with the casting.
- the adjustment can also be larger or smaller than the preferred adjustment.
- Pressing process for the production of the mold is completed, travels.
- the actuator By the actuator, the total travel distance of the pressing device or the total stroke of a printing cylinder of the pressing device can be extended or shortened.
- the system comprises at least one force sensor, one of the
- Pressing device and / or the pressing head in the molding material registered or applied to the molding material force measures instead of or in addition to the force sensor, an optical sensor or a sonic pulse sensor can also be used to measure the densification of the molding material in an area below the surface. Reference is made to the comments on the procedure.
- the system comprises a controller, wherein the control is signal-technically connected at least to the sensor and the actuator.
- the controller automatically adjusts the distance between the sensor based on the signal from the sensor
- Pressing device and molding box respectively a bottom of the molding box.
- This setting can be started before the start of the movement of the pressing device and must be completed at the latest, just before the molding box comes into contact with the pressing head.
- the control can be a central control of the molding plant, but it is preferably a separate control with extremely short control times.
- the molding machine may have other features that - mutatis mutandis - the
- FIG. 1 shows a graphical representation of results of several
- FIG. 2 shows a graph of the achieved compaction in FIG.
- FIG. 3 shows a relationship in a graphical representation
- FIG. 4 shows a section of a graphic in an enlargement
- FIG. 5 shows a detail of a molding installation 1 with force sensors 30, 30 '.
- FIG. 6 shows a detail of another molding installation in which the force
- FIG. 7 illustrates a controller 102 or 102 'with sampling clock T. Am
- the controller 102 then changes for the
- the distance s 0 to Si (or from Si to s 2) , the distance to the model plate 46, the lower edge of the
- Mold box 40 reached. This also (indirectly) the stroke of the second section of the pressing process is changed. This is due to the (determined, ie measured or from other values, for example pressure calculated) differential resistance between the setpoint and actual value, which the controller 102 or 102 'feeds. That is the rule difference of
- FIG. 8 shows a control process in which the controller 102 in the controller
- FIG. 8a shows an end of the impression with the path s returned
- FIG. 9 shows isolated force-displacement characteristics of two molding materials A
- FIG. 1 shows the standard container already mentioned, which can be filled with a sample of a molding material.
- the molding material is intended to be compacted in a molding line into a molding material mold for a metal casting.
- the molding material can be compacted by means of a punch.
- the punch is connected to a hydraulic cylinder, for example, which presses the punch with an adjustable force in the standard container. When the punch has been pushed into the standard container with the specified force, the penetration depth of the punch into the standard container can be measured.
- This measurable value is representative of the compaction behavior of the material in the standard container, is considered in the prior art as representative of the compaction behavior of an entire batch.
- the value of the measurement is used to set a distance or a stroke for the recompression on a pressing device for producing a molding material. With this adjustment of the re-compaction, an entire batch of the molding material is then processed in a molding installation in the prior art.
- the graphical representation next to the standard container shows by way of example the result of pressing operations with several material samples of a single batch of corresponding molding material with an equal force.
- the force acting on the punch is applied to the depth of penetration of the punch in the standard container.
- the measurement results show that the molding material of a batch is not nearly homogeneous, but that with a compression of the samples with identical force, the penetration depth of the punch S in the standard container B is between about 12mm and about 50mm.
- FIG. 2 likewise shows a graphic representation, as has already been conveyed with FIG. Arrows represent plastically that at a fixed stroke (distance), depending on the composition or property of the molding material, the granular molding material is compacted with a force of a minimum of about 1700N and a maximum of about 2400N. That is, the molding materials made with these materials under identical pressure have very different strengths, which is detrimental to smooth production, for example, can lead to increased rejects.
- FIG. 3 shows in a further graphical representation that in the case of the molding material forms the achievable strength of the mold is compressed directly (substantially linearly) from the force input into the molding material at the end of the compression process or from the force with which the molding material is compressed at the end of the compression process, depends.
- FIG. 4 shows an enlarged detail of a graphical representation with a target region for a desired dimensional stability of a molding material.
- the target area is limited by a lower limit F ⁇ n and an upper limit F max . That is, a force at the end of the stroke must have been achieved so that a curve in a graph showing the strength over a distance (from FIG. 2) that lies within the target range at the end of the stroke.
- This range can be a hysteresis, or only have a value as a "switching value" that reaches or at least a little bit
- the stamp thus sets a different path, nevertheless the end of this changed path is still the lower edge of the molding box. But the force at the end of the changed path is different, in such a way that it corresponds to the target value, which is representative of the hardness of the surface (mostly on the surface)
- FIG. 5 shows an exemplary construction of a pressing device 1 of a molding installation in which a molding material 41 can be compacted to form a molding material.
- a pressing device 1 Shown is in a vertical longitudinal section, a pressing device 1 a molding plant for the production of form material forms or molds for metal casting.
- Pressing device comprises a lifting cylinder 2, which with an adjustable pressure in
- the lifting cylinder 2 may be a cylinder which can be acted upon with oil or air.
- a linear drive can be used, for example, a rack which can be moved linearly by a gear drive.
- the lifting cylinder 2 is connected via a connecting device 3 with the underside of a
- the molding box 40 connected.
- the molding box 40 comprises a filling frame 42.
- the molding box 40 and the filling frame 42 are subsumed under the term "raised molding box” 40.
- the molding box 40 is filled with a molding material 41.
- a press head 10 is arranged with a multi-stamp 11. From the press head 10 protrudes in the direction of the mold box 40 from a stop 13, which is a movement of the
- Form box 40 limited in the arrow direction.
- the connecting device 3 comprises an actuator 20 with a drive 21 and a support cylinder 22, in which the actuator 20 can at least partially retract when the lifting cylinder 2 moves to its final position.
- the drive 21 is decoupled from the drive of the lifting cylinder 2. With the actuator 20, a distance between the top of the
- Lifting cylinder 2 (or the model carrier 46) and the bottom or lower edge 40 a of Mold box 40 (the model plate with the model standing on it to specify the cavity of the molding material form) are enlarged or reduced.
- the set distance Si can be minimum zero.
- a maximum value is determined by the structural design of the actuator 20.
- two sensors 30 are arranged in this embodiment, which measure one of the lifting cylinder 2 and / or the pressing head 10 acting on the mold material 41 force.
- the force measured by the sensors 30 is applied to a
- the controller 100 comprises a storage medium 101, in which a predetermined strength value is stored for the molded material form to be produced, or limit values are stored within which a desired strength value lies (controlled variable or target variable).
- a microprocessor 102 as a control device functions as a "control or regulation” (a functionally adapted technical program or more such modules as a controller), with a measured by the sensor 30 strength value held in the memory 101 or separately predetermined strength value can be compared.
- a correction value can be calculated, which is output as a signal to the actuator 20.
- the signal causes activation of the drive 21, which can move the actuator 20 from its position to another position.
- the position Si is considered from a control point of view changed into a second position (or a second distance) s 2 .
- a working cycle of the pressing device 1 of the molding plant can, for example, proceed as follows ...
- the filled with molding material 41 molding box 40 is in the
- the lifting cylinder 2 moves with the molding box 40 in the direction of
- Actuator 20 set distance Si. • The multi-stamp 11 are pressed further into the mold material 41.
- FIG. 6 shows an exemplary construction of a pressing device 1 'of a comparable molding installation, in which a molding material 41 is compacted to form a molding material, but the control system and its measured values work differently.
- the force is not measured here on the model, but calculated on the pressure P of the lower ram from the control 90 (determined). The determination is made via a proportional factor (force per area is pressure).
- the determined force F 2 is passed to a controller 100 '.
- This controller 100 ' comprises a memory 101' in which a predetermined strength value is stored for the molding material to be produced, or limit values are stored within which a desired strength value lies (controlled variable or target variable).
- the controller in this case reduces the path for the next impression by As, because the force has been too high. In the other case, if the determined force was too small (and thus the desired strength was too low), the path is increased by As.
- the force is determined which, at the end of the stroke s, presses the model into the foundry sand.
- the cycle of compression is T. For each T there is a strength value in the form of the (measured or determined) force at the end of a molding process (as a compression process). This is deducted from the setpoint w, so that a control difference at the subtractor 99 results, cf. Figure 7.
- the controller changes the distance s 0 , Si, s 2 until the model plate 46 reaches the lower edge 40 a of the molding box 40. This also (indirectly) changes the stroke of the second section of a Twinpress compaction. This due to the differential resistance between the setpoint and actual value, which feeds the controller 102.
- Figures 8a and 8b are self-explanatory in the process. They show the beginning of the second compression, ie the approach of the model carrier 46 to the lower edge of the molding box 40, and the end in Figure 8a, in which this lower edge is reached and the resulting force at F is thus shown in the diagram. Another molding material would have reached only the force (and strength), which shows the underlying curve as reached.
- FIG. 9 illustrates the force-displacement characteristic of two "sands" (molding materials). Two curves with not the same force-displacement characteristic illustrate the very different force obtained (dimensional stability) for the same distance s. The same path is marked by arrows of the same length, which give distinctly different forces (shown on the ordinate on the left), about 1.5 kN and about 2.8 kN (sand A).
- the path can be adapted. Exactly this way is the solution with the force control and the path change in the second compression process (the second stroke), and since the end of the second stroke is mandatory, namely the lower edge 40a of the molding box 40, the stroke to be covered must be changed by the As described above become.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Devices For Molds (AREA)
- Control Of Presses (AREA)
- Powder Metallurgy (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015109640 | 2015-06-17 | ||
DE102015109805.9A DE102015109805A1 (en) | 2015-06-17 | 2015-06-18 | Production of high-quality molds for metal casting (method and device) |
PCT/IB2016/053537 WO2016203394A1 (en) | 2015-06-17 | 2016-06-15 | Method and device for producing mould material moulds for the casting of metals |
Publications (2)
Publication Number | Publication Date |
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EP3310508A1 true EP3310508A1 (en) | 2018-04-25 |
EP3310508B1 EP3310508B1 (en) | 2020-02-12 |
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Application Number | Title | Priority Date | Filing Date |
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EP16731979.7A Active EP3310508B1 (en) | 2015-06-17 | 2016-06-15 | Method and device for producing mould material moulds for the casting of metals |
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US (1) | US20190193144A1 (en) |
EP (1) | EP3310508B1 (en) |
CN (1) | CN108200764B (en) |
DE (1) | DE102015109805A1 (en) |
EA (1) | EA035330B1 (en) |
UA (1) | UA123500C2 (en) |
WO (1) | WO2016203394A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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EP3539686B1 (en) * | 2018-03-15 | 2022-01-26 | Künkel Wagner Germany GmbH | Moulding machine with a bolster arrangement and method for producing a mould |
US20200376541A1 (en) * | 2018-05-07 | 2020-12-03 | Sintokogio, Ltd. | Green sand mold forming sensor and green sand mold formability evaluation method |
TW201946709A (en) * | 2018-05-07 | 2019-12-16 | 日商新東工業股份有限公司 | Mold forming device, mold quality evaluation device, and mold quality evaluation method |
JP7298605B2 (en) * | 2018-06-15 | 2023-06-27 | 新東工業株式会社 | Mold making device, mold quality evaluation device, and mold quality evaluation method |
WO2019239733A1 (en) * | 2018-06-15 | 2019-12-19 | 新東工業株式会社 | Mold molding apparatus and method for controlling mold molding apparatus |
TW202000336A (en) * | 2018-06-15 | 2020-01-01 | 日商新東工業股份有限公司 | Green sand mold molding sensor and green sand mold moldability evaluation method |
CN116277690A (en) * | 2023-05-23 | 2023-06-23 | 成都正西液压设备制造有限公司 | Composite material molding press electric control system based on mold parameter detection |
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JPS6192439U (en) * | 1984-11-16 | 1986-06-14 | ||
DK169236B1 (en) * | 1993-07-20 | 1994-09-19 | Dansk Ind Syndikat | Process for making molds or parts thereof by compressing particulate matter and apparatus for carrying out the process |
DE60217205T2 (en) * | 2001-03-16 | 2007-10-04 | Sintokogio, Ltd., Nagoya | Method and device for compacting foundry sand |
KR100893642B1 (en) * | 2001-08-06 | 2009-04-17 | 신토고교 가부시키가이샤 | Method and system for monitoring molding machine |
JP5995542B2 (en) * | 2012-06-08 | 2016-09-21 | メタルエンジニアリング株式会社 | Mold making method and apparatus |
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2015
- 2015-06-18 DE DE102015109805.9A patent/DE102015109805A1/en not_active Withdrawn
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2016
- 2016-06-15 WO PCT/IB2016/053537 patent/WO2016203394A1/en active Application Filing
- 2016-06-15 EP EP16731979.7A patent/EP3310508B1/en active Active
- 2016-06-15 EA EA201792461A patent/EA035330B1/en unknown
- 2016-06-15 UA UAA201713083A patent/UA123500C2/en unknown
- 2016-06-15 US US15/735,665 patent/US20190193144A1/en not_active Abandoned
- 2016-06-15 CN CN201680035250.6A patent/CN108200764B/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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CN108200764B (en) | 2021-05-28 |
EA035330B1 (en) | 2020-05-28 |
US20190193144A1 (en) | 2019-06-27 |
EP3310508B1 (en) | 2020-02-12 |
EA201792461A1 (en) | 2018-07-31 |
WO2016203394A1 (en) | 2016-12-22 |
DE102015109805A1 (en) | 2016-12-22 |
CN108200764A (en) | 2018-06-22 |
UA123500C2 (en) | 2021-04-14 |
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