CN114179315A

CN114179315A - Plasticizing unit for a molding machine and molding machine having a corresponding plasticizing unit

Info

Publication number: CN114179315A
Application number: CN202111067460.2A
Authority: CN
Inventors: F·波罗德; G·肖特
Original assignee: Engel Austria GmbH
Current assignee: Engel Austria GmbH
Priority date: 2020-09-14
Filing date: 2021-09-13
Publication date: 2022-03-15
Also published as: DE102021123755A1; AT524177B1; AT524177A1

Abstract

The invention relates to a plasticizing unit for a molding machine, comprising a plasticizing assembly (2) for plasticizing and/or injecting plastic material and a frame, in particular an intermediate frame (3), for mounting at least one part of the plasticizing assembly (2), at least the at least one part of the plasticizing assembly (2) being mounted on the frame in a linearly displaceable manner along a longitudinal axis (5) of the plasticizing assembly (2) by means of a guide unit (11), and at least the at least one part of the plasticizing assembly (2) being mounted in a tiltable manner about the longitudinal axis (5) relative to the guide unit (11) by means of at least one solid joint (4).

Description

Plasticizing unit for a molding machine and molding machine having a corresponding plasticizing unit

Technical Field

The invention relates to a plasticizing unit for a molding machine having the features of claim 1 or the preamble of claim 16, and to a molding machine having a corresponding plasticizing unit.

Background

A plasticizing unit of this type has a plasticizing assembly for plasticizing plastic material and a frame for supporting the plasticizing assembly, wherein the plasticizing unit is supported on the frame in a linearly displaceable manner by a guide unit.

A molding machine is understood to mean an injection molding machine, a compression molding machine and the like. The prior art is described below with the aid of an injection molding machine. A similar situation applies to a general molding machine.

Plasticizing assemblies used in injection molding machines generally have at least one material cylinder (also referred to as plasticizing cylinder) in which a plasticizing screw that is rotatable and movable along a longitudinal axis is located.

The plastic is plasticized, i.e. brought into a plastic state, in the plasticizing cylinder by the rotation of the screw and the shear heat which arises as a result, and in most cases also by an external heating device for delivering additional heat. The plasticized plastic can then be injected by longitudinal movement of the plasticizing screw, i.e. pushed out of the plasticizing cylinder and introduced into the cavity of the mold.

Due to the high viscosity of the plastic, relatively large forces have to be applied for plasticizing and injection, even in the plasticized state, which also causes, due to its reaction, deformation of the support means of the plasticizing assembly and of the individual components of the plasticizing assembly.

In general, the deformation is caused by the movements, accelerations and applied forces generated in the plasticizing unit during the production cycle.

These deformations can also be generated, for example, by inertial forces caused by acceleration or deceleration of the plasticizing component on the guide unit of the plasticizing component or on the frame.

Embodiments known from the prior art are known, for example, from DE3212670a1 or DE202006012268U 1.

It is known from the prior art that the plasticizing unit of an injection molding machine is connected almost rigidly via a guide unit to the frame of the plasticizing unit or to the machine frame of the injection molding machine.

Since the plasticizing unit is supported in the injection molding machine relative to the frame or machine frame by means of the guide unit, the mentioned deformations are of course also acting on the guide unit.

Of course, these deformations are rather small in absolute value, for example a few tenths of a millimeter, taking into account the materials used. However, the deformation region already greatly influences the service life of the guide, since it is also to be taken into account that the guide is usually made of a very hard and brittle material which is usually hardened by a hardening or coating process at the guide surface and additionally reinforced for use.

These very hard and brittle materials and surfaces react very strongly to deformation in fatigue strength tests, in which microcracks and/or plastic deformations have already formed in the case of very small deformations and low load alternation numbers (Lastwechselzahlen). This already very quickly leads to wear phenomena, such as deviations in accuracy and/or no longer providing functionality, in the guide element.

Disclosure of Invention

The object of the invention is to provide a plasticizing unit and a molding machine having such a plasticizing unit, the guide of which is subjected to a lower load than in the prior art.

This object is achieved on the one hand in the plasticizing unit by the features of claim 1. This is achieved by: at least the at least one component of the plasticizing component is mounted in an inclinable manner about a longitudinal axis of the plasticizing component relative to the at least one guide unit by means of at least one solid joint.

By reducing the stress of the guide according to the invention, a longer service life of the guide can be achieved in the first place.

The components of the plasticizing assembly may be, for example, a metering drive (i.e., a drive for rotating the plasticizing screw) and/or a cylinder plate of the plasticizing assembly and/or an intermediate frame of the plasticizing unit.

Of course, the plasticizing assembly can also be supported according to the invention as a whole (i.e. for example together with the plasticizing screw, the material cylinder, the carrier plate, the drive and/or the cylinder plate) and thus form the at least one component.

Furthermore, by providing a solid joint, the at least one component of the plasticizing assembly (for example, the cylinder plate of the plasticizing assembly) is mounted in a tiltable manner relative to the at least one guide unit by means of the solid joint, and a fluctuating compensating movement between the plasticizing assembly relative to the at least one guide unit is also permitted, which compensating movement mounts the plasticizing assembly relative to the at least one guide unit in such a way that tilting of the plasticizing assembly and/or the frame does not have to take place together due to the forces occurring. These deformations are therefore compensated by the solid joint and the guide is subjected to less stress, which increases its service life.

The object is also achieved by the features of claim 16 in that at least the at least one part of the plasticizing assembly is supported by means of at least one solid joint designed for at least biaxial deformation. A biaxial (or multiaxial) deformation is understood here to mean that two or more different deformations are provided for which the solid joint is designed. In engineering terms, each deformation is assigned to an axis. For example, deformations of the plasticizing component about the longitudinal axis and about the transverse axis (transverse to the longitudinal axis) can thus be compensated/compensated.

The deformation affecting the guide is in many cases not only a simple uniaxial deformation, since the plasticizing unit is relatively complex and has a plurality of different drives which each cause a separate deformation. An example is the combination of the torsional and tensile and compressive loads of the plasticizing component, which occur, for example, during injection, as a result of the rotational movement of the plasticizing screw during plasticizing. Since the injection movement is also effected in many cases by different drive units, for example hydraulic cylinders, complex deformations occur which, as described, can have a negative effect on the guide.

By means of the solid joint according to the invention, which can be deformed biaxially or more, these negative effects can at least be reduced, if not eliminated.

Another great advantage of the solid joint is that the deformation is compensated by an elastic deformation of the solid joint. This elastic deformation of the solid joint requires neither play nor a lubricant. The elastic deformation under the action of the force can be calculated very accurately and precisely, whereby the position of the plasticizing component can also be predicted relatively accurately.

Another advantage of the solid joint is that, when the solid joint is elastically deformed, a reaction force is immediately generated by internal friction with respect to the deformation, which counteracts the force causing the deformation and dampens the optionally subsequent (return) oscillations caused by the deflection.

In particular, the at least one solid joint can have at least one elastic zone. The solid joint can be implemented, for example, by selecting suitable materials, wherein a material with a lower E-modulus is used in the joint region, and/or the elastic deformation of the solid joint can be deflected by means of a geometric design (e.g., a cross-sectional reduction).

The term "E modulus" as used below refers to the modulus of elasticity of a material.

Synonyms for tensile modulus, modulus of elasticity, tensile modulus of elasticity or young's modulus are also known and are material characteristic values in material technology which describe the proportional relationship between stress and elongation at solid deformation in linear elastic behavior. The modulus of elasticity is a proportionality constant in hooke's law. The material characteristic values are known to those skilled in the art and can be found in any material characteristic value data table for a material.

Furthermore, a molding machine having at least one plasticizing unit according to the invention is claimed.

Advantageous embodiments of the invention are defined in the dependent claims.

Preferably, the at least one part of the plasticizing assembly is mounted so as to be movable along a longitudinal axis, wherein the at least one part of the plasticizing assembly is mounted so as to be tiltable in the direction of the longitudinal axis relative to the at least one guide unit (in other words: mounted so as to be tiltable about a transverse axis relative to the longitudinal axis, wherein the transverse axis is at right angles to the longitudinal axis) by means of the at least one solid joint. Such a deformation of the solid joint can compensate for deformations caused by injection or pressing of the plasticizing component, for example, by tilting, without subjecting the guide unit to increased loads.

The embodiment of the invention, in which the oblique deformations not only about the longitudinal axis but also along the longitudinal axis (i.e. at least two-axis deformations) are compensated, may be particularly preferred, since the deformations occurring can be compensated in this way particularly well and completely, which can be manifested in a particularly long service life of the guide.

It can be provided that a plurality of solid joints are provided for mounting the at least one component of the plasticizing assembly.

It is preferably provided that the frame is designed as an intermediate frame which is connected to the frame of the molding machine or as a frame of the molding machine. It can therefore be provided that the plasticizing unit has a frame separate from the molding machine, which is connected to the machine frame, for example, by means of guides, welded connections or threaded connections. However, it is also fully conceivable for the frame of the plasticizing unit to be formed by the machine frame of the molding machine itself, wherein the at least one component of the plasticizing unit is arranged on the machine frame by means of the at least one guide unit.

Provision may be made for the at least one component of the plasticizing unit to be arranged on the intermediate frame, wherein deformations may be caused in the intermediate frame by the injection and/or metering movement of the plasticizing unit, which deformations, as described, have an adverse effect on the guidance of the individual components (e.g., the metering drive) and can be compensated according to the invention.

The intermediate frame can be arranged, for example, on a machine frame, wherein the plasticizing component can preferably be pressed onto the mold by a relative movement between the intermediate frame and the machine frame. According to the invention, deformations which are caused by such a relative movement and which have an influence on the guide of the intermediate frame can also be compensated.

Provision can be made for the plasticizing assembly to have a plasticizing screw arranged in the material cylinder.

Preferably, at least one metering drive is provided, which is designed to rotationally drive the plasticizing screw.

At least one injection actuator may be provided, which is configured to impart a linear injection movement to the plasticizing assembly.

The injection actuator may include one or more hydraulic cylinders for generating injection motion (e.g., of a plasticizing screw or other injection piston).

It can be provided that at least one linear drive, preferably a linear drive and/or a spindle drive, which is designed as a piston-cylinder unit, is provided. The spindle drive can be driven, for example, by an electric drive unit.

In an exemplary embodiment, it can be provided that the at least one linear drive, which is preferably designed as a piston-cylinder unit, connects the plasticizing component to a stationary mold clamping plate of the molding machine, a clamping unit of the molding machine or a carrier plate of the plasticizing unit. In this case, it can be provided that the linear drive is supported directly on the plasticizing component on the one hand and on a stationary mold clamping plate, clamping unit or carrier plate on the other hand, wherein the relative movement and/or the pressing force for the plasticizing component can be implemented by means of the at least one linear drive.

Of course, embodiments are also conceivable in which the plasticizing component is pressed, for example, directly against a stationary mold clamping plate of the molding machine.

Provision may be made for the at least one guide unit to have at least one guide rail, which is preferably connected to the frame in a kinematic lock (bewegungsschlussig), and for the at least one guide rail to connect the at least one component of the plasticizing unit to the frame in a linearly displaceable manner (preferably via at least one guide carriage described below).

For example, a further guide rail can be provided, which is connected in a kinematically locking manner to the at least one component of the plasticizing unit, wherein the at least one guide rail and the at least one further guide rail can be moved linearly relative to one another in order to form the at least one guide element, if appropriate by means of rolling bodies.

It can be provided that the at least one guide unit has at least one guide carriage, which is preferably connected in a movement-locking manner to the at least one component of the plasticizing unit, and that the at least one guide carriage is arranged on the at least one guide rail in a linearly displaceable manner. The at least one guide carriage can be configured, for example, as a guide shoe. Designs with a plurality of guide carriages are also conceivable.

In general, therefore, a preferred embodiment is one in which the guide unit comprises one or more guide rails on which one or more guide carriages run in each case. A similar situation applies for the at least one further guide rail.

In particular, it can be provided that the at least one solid joint is located in the force flow between the at least one component of the plasticizing assembly and the at least one guide carriage during operation.

It can be provided that the at least one solid joint is arranged in space between the at least one component of the plasticizing assembly and the at least one guide carriage.

The solid joint can be formed, for example, as part of the plasticizing assembly or as part of the guide carriage. However, it is also fully conceivable to form the solid joint from separate components, for example, on the plasticizing assembly and the guide carriage. This arrangement may be achieved by welding or screwing.

Preferably, it can be provided that the at least one solid joint is at least partially made of a material having a lower modulus of elasticity than the at least one component, the plasticizing component and/or the at least one guide unit, in particular the at least one guide rail and/or the at least one guide carriage.

Preferably, it can be provided that the at least one solid joint has a sleeve and an inner part arranged in the sleeve, wherein at least one material having a lower modulus of elasticity than the sleeve and/or the inner part is arranged between the sleeve and the inner part. Preferably, the sleeve and/or the inner part are of cylindrical design. The inner part may be configured, for example, as a shaft or a pin.

Preferably, it can be provided that the sleeve of the at least one solid joint is connected in a kinematically locking manner to the at least one guide unit and the inner part is connected in a kinematically locking manner to the at least one part of the plasticizing assembly, wherein preferably the center line of the sleeve extends vertically from the at least one guide unit toward the plasticizing assembly.

Preferably, the gap between the sleeve and the inner part varies in its cross section in the circumferential direction of the inner part, wherein the gap is filled by at least one material having a lower modulus of elasticity.

The gap can be filled in such a way that: the at least one material with a lower modulus of elasticity is inserted into the gap or the gap is cast, for example, with a material with a lower modulus of elasticity.

For example, the gap may be cast by an elastomeric material which, after hardening, fills the gap between the inner part and the sleeve. Alternatively, however, it can also be provided that at least one further additional component made of the at least one material with a lower modulus of elasticity is inserted between the inner part and the sleeve. Provision may also be made for a plurality of parts made of at least one material with a lower modulus of elasticity to be used in the circumferential direction of the inner part, which parts allow tilting in the circumferential direction of the inner part to different extents. Thus, for example, the plasticizing assembly may be allowed to tilt about a longitudinal axis of the plasticizing assembly to a greater degree than a tilt about a transverse axis of the longitudinal axis of the plasticizing assembly.

Drawings

Further advantages and details of the invention emerge from the figures and the description of the figures relating thereto.

Here:

figure 1a shows a first embodiment of the plasticizing unit,

figure 1b shows the embodiment in figure 1a in a top view,

figure 2 shows an embodiment of the prior art under force loading,

figure 3 shows an embodiment according to the invention,

figures 4a and 4b show the embodiment of figure 3 under force,

figures 5a and 5b show another embodiment according to the invention,

figures 6a and 6b show a third embodiment according to the invention,

figures 7a and 7b show a fourth embodiment according to the invention,

figure 8 shows the embodiment of figures 5, 6 or 7 in a simplified side view,

figures 9a and 9b show the embodiment of figures 5, 6 or 7 under force,

figure 10a shows a first embodiment of a solid joint,

figure 10b shows the embodiment in figure 10a in a view from below,

figure 11a shows a second embodiment of a solid joint,

figure 11b shows the embodiment in figure 11a in a view from the lower side,

fig. 12 shows a different variant of the bearing by the solid joint.

Detailed Description

Fig. 1a shows a first exemplary embodiment of a plasticizing unit 1, wherein fig. 1b shows the exemplary embodiment of fig. 1a in a plan view. The exemplary embodiment shown has a plasticizing assembly 2 which is connected to the intermediate frame 3 of the plasticizing unit 1 via two guide units 11.

In this exemplary embodiment, the guide unit 11 is formed by a guide carriage 10, which is supported on the guide rail 9.

In this exemplary embodiment, the plasticizing assembly 2 has a plasticizing screw 7 which is arranged in the material cylinder 6 (the plasticizing screw 7 is not visible here, since it is located inside the material cylinder 6). Furthermore, the material cylinder 6 has a heating belt 20, which is arranged on the circumference of the material cylinder 6 and additionally assists the plasticization by means of thermal energy. For shielding and/or thermal insulation, a cover 15 of the material vat 6 is provided.

The plasticizing screw 7 can be driven in rotation by means of a metering drive 19 in order to plasticize the plastic. The metering drive 19 is also arranged on the cylinder plate 18, as is the plasticizing screw 7.

In order to push the plasticized material, to be precise the plasticized plastic, out of the material cylinder 6 through the injection nozzle 14, two injection actuators 25 are provided.

In this case, the injection actuator 25 is supported on the one hand on the cylinder plate 18 and on the other hand on the carrier plate 16. Since the carrier plate 16 is rigidly arranged on the intermediate frame 3, the cylinder plate 18 with the plasticizing screw 7 arranged thereon can be moved linearly by the injection actuator 25 relative to the material cylinder 6 fixed to the carrier plate 16, wherein the plasticized plastic is pressed out by the injection nozzle 14 and, if necessary, fed to the mold or to the mold cavity of the mold.

The intermediate frame 3 is connected to the frame 24 via two further guide units 11a, wherein these guide units 11a have a guide rail 9a and a guide carriage 10 a.

The plasticizing unit 2 is connected to a stationary mold clamping plate 26 of the molding machine by means of a linear drive 8 (precisely two piston-cylinder units) and can therefore be moved linearly along its longitudinal axis 5 by means of the linear drive 8.

Furthermore, the plasticizing component 2 with the injection nozzle 14 can be pressed by the linear drive 8 against a stationary mold clamping plate 26, mold or mold part. This pressing force is also referred to as the nozzle pressing force.

Fig. 2 shows a prior art exemplary embodiment under force loading, wherein fig. 2 shows a plan view of a plasticizing assembly 2 according to the prior art.

The plasticizing screw 7 is set in rotary motion by a metering drive 19 and the plastic to be plasticized is plasticized by the plasticizing screw 7. This plasticization (or metering) leads to deformation.

The plasticized mass is then injected into the mold via the injection nozzle 14, wherein the plasticized mass (plastic) is pushed out of the material cylinder 6 by the injection actuator 25 by means of a relative movement between the plasticizing screw 7 and the material cylinder 6. The deformation produced by the injection movement is visible in fig. 2.

The tilting of the intermediate frame 3 can be anticipated by the injection force in the rear region, where the plasticizing component 2 is placed on the intermediate frame 3 by the guide element 11, thereby causing the plasticizing component 2 to tilt backwards.

A deformation about the longitudinal axis 5 of the plasticizing unit 2 is also caused by the rotation of the plasticizing screw 7, wherein the deformation on the guide element 11 and the machine frame 3 is caused by a reaction force generated by shearing in the material cylinder 6 as a result of the rotation of the plasticizing screw 7.

In order to compensate for this deformation, according to an embodiment of the invention (as shown in fig. 3) a solid joint 4 is provided between the plasticizing assembly 2 and the guide unit 11.

The guide unit 11 is formed in the exemplary embodiment of fig. 3 by a guide rail 9 and a guide carriage 10 which is linearly displaceable relative to the guide rail. The guide rails 9 are arranged in a kinematically locked manner on the intermediate frame 3 and the machine frame 24 and the guide carriage 10 is arranged on the plasticizing unit 2 and the intermediate frame 3 via the solid joints 4.

Fig. 4a and 4b show the embodiment variant shown in fig. 3 under load of force (precisely showing the deformation occurring during plasticization), wherein it is clearly apparent how the guide unit 11 undergoes a significantly smaller deformation. For easier understanding, the solid joint 4 is shown as a spring in these figures.

The arrangement of the plasticizing component 2 on the guide carriage 10 by means of the solid joint 4 allows the plasticizing component 2 to be tilted relative to the guide carriage 10 and thus relative to the guide unit 11, whereby deformations can be compensated and the guide element 11 is subjected to a significantly reduced force, which in turn greatly increases the service life of the guide element 11.

Fig. 5a and 5b show a further exemplary embodiment of the plasticizing unit 1, wherein fig. 5a shows a side view and fig. 5b shows a top view.

In direct comparison with fig. 3, in the embodiment of fig. 5, the plasticizing assembly 2 is otherwise supported on the intermediate frame 3. The intermediate frame 3 is connected to the machine frame 24 in a linearly movable manner via the guide elements 11.

The guide element 11 is formed by the guide rail 9 and a guide carriage 10 which is linearly displaceable relative to the guide rail. The guide rails 9 are arranged on the machine frame 24 in a movement-locking manner and the guide carriage 10 is arranged on the intermediate frame 3 and thus on the plasticizing unit 2 via the solid-state joints 4.

For driving the linear injection movement, the linear drive 8 is supported on the intermediate frame 3 and the stationary mold clamping plate 26.

Fig. 6a shows a side view and fig. 6b shows a top view of a third exemplary embodiment of the plasticizing unit 1.

In direct comparison with fig. 1, in the embodiment of fig. 6, the plasticizing assembly 2 is supported by two intermediate frames 3. The intermediate frame 3 is connected to the machine frame 24 in a linearly movable manner via the guide elements 11.

The guide element 11 is formed by the guide rail 9 and a guide carriage 10 which is linearly displaceable relative to the guide rail. The guide rails 9 are arranged fixedly on the machine frame 24 and the guide carriage 10 is connected to the intermediate frame 3 and thus to the plasticizing unit 2 via the solid joints 4.

The linear drive 8 acts on the carrier plate 16 and the stationary mold clamping plate 26.

The injection actuator 25 causes an injection movement by a movement between the carrier plate 16 and the cylinder plate 18, wherein the carrier plate 16 is connected with the material cylinder 6 and the cylinder plate 18 is connected with the plasticizing screw 7. The plasticized material can be pushed out by a relative movement between the plasticizing screw 7 and the material cylinder 6.

Fig. 7 shows a fourth exemplary embodiment of the plasticizing unit 1, wherein fig. 7a shows a side view and fig. 7b shows a top view.

In direct comparison with fig. 6, in the embodiment of fig. 7, the cylinder plate 18 is arranged closer to the stationary mold clamping plate 26 and supports the material cylinder 6. The plasticizing screw 7 and the metering drive 19 are fixed to the motor plate 17.

The injection movement as described above can be performed by linear movement of the motor plate 17 relative to the cylinder plate 18 by means of the injection actuator 25.

The linear drive 8 acts on the intermediate frame 3 and the fixed die clamping plate 26.

Fig. 8 shows a schematic front view of the embodiment of fig. 5, 6 or 7.

Fig. 9a and 9b show the embodiment variant of fig. 5 under force loading (more precisely during metering). A similar variation to that in fig. 9a and 9b occurs in the embodiment of fig. 6 and 7.

As fig. 1a to 9b show, it is an essential aspect of the invention to compensate for deformations occurring, for example, during injection, metering or pressing and thus to avoid the negative effects described at the outset on the guide unit 11.

Fig. 10a shows a first exemplary embodiment of a solid joint. Fig. 10b shows a view from below of the exemplary embodiment according to fig. 10 a.

The solid joint 4 shown here has a sleeve 12 and an inner part 13 arranged in the sleeve 12. In this exemplary embodiment, the sleeve 12 is of cylindrical design and the inner part 13 is designed as a rotationally symmetrical journal.

In order to establish a certain articulation between the sleeve 12 and the inner part 13, the inner part 13 is pressed against the bushing 22 in the sleeve 12, wherein the bushing 22 is made of a material having a lower modulus of elasticity than the inner part 13 and the sleeve 12. Preferably, the bushing 22 of this embodiment is made of a hard, resilient plastic.

In order to provide the solid joint 4 with a certain elasticity even with respect to vertical loads, a washer 21 is furthermore provided between the inner part 13 and the sleeve 12, which washer is also made of a material having a lower modulus of elasticity than the sleeve 12 and the inner part 13. The washer 21 may be made of the same material as the bushing 22, for example.

However, it is also conceivable that the gap formed between the inner piece 13 and the sleeve 12 is cast by a material (for example epoxy) which, after curing in the gap, will assume the same function as the bush 22 and the washer 21.

Fig. 11a and 11b show a further embodiment of the solid joint 4, in which, in direct comparison with fig. 10a and 10b, additional connecting elements 23 are provided along the circumference of the inner part 13.

These additional connecting elements 23 are provided not only to fix the position of the inner part 13 relative to the sleeve 12, wherein the two components are prevented from rotating relative to one another by the connecting elements, but also to allow the deformability of the solid joint 4 to be varied in a targeted manner depending on the direction of the load.

Since the connecting element 23 is also made of a material with a lower modulus of elasticity than the sleeve 12 or the inner part 13, the solid joint 4 of the embodiment of fig. 11a and 11b can be deformed more when a force is applied perpendicular to the connecting element 23 than when a force acts next to the connecting element 23.

Other geometric designs of the solid joint can also be used in the plasticizing unit to compensate for biaxial deformations. The appearance of such a geometric embodiment for the solid joint 4 is shown in different views (a to H) in fig. 12.

List of reference numerals

1 plasticizing unit

2 plasticizing component

3 intermediate frame

4 solid movable joint

5 longitudinal axis

6 material jar

7 plasticizing screw

8 Linear driving device

9 guide rail

10 guide carriage

11 guide unit

12 sleeve

13 inner part

14 injection nozzle

15 covering piece for material jar

16 carrier plate

17 motor plate

18 cylinder plate

19 metering drive

20 heating belt

21 gasket

22 liner

23 connecting element

24 frame

25 injection actuator

26 fixed die clamping plate

Claims

1. Plasticizing unit for a molding machine, having a plasticizing assembly (2) for plasticizing and/or injecting plastic material and a frame, in particular an intermediate frame (3), for mounting at least one part of the plasticizing assembly (2), at least the at least one part of the plasticizing assembly (2) being mounted on the frame in a linearly movable manner along a longitudinal axis (5) of the plasticizing assembly (2) by means of a guide unit (11), characterized in that at least the at least one part of the plasticizing assembly (2) is mounted in a tiltable manner about the longitudinal axis (5) relative to the guide unit (11) by means of at least one solid joint (4).

2. Plasticizing unit according to claim 1, characterized in that the at least one component of the plasticizing assembly (2) is supported by means of the at least one solid joint (4) in a manner tiltable in the direction of the longitudinal axis (5).

3. Plasticizing unit according to any of the preceding claims, characterized in that a plurality of solid joints (4) are provided for supporting the at least one component of the plasticizing assembly (2).

4. Plasticizing unit according to at least one of the preceding claims, characterized in that the frame (3) is connected with the frame (24) of the molding machine or is configured as a frame (24) of the molding machine.

5. Plasticizing unit according to at least one of the preceding claims, characterized in that the plasticizing assembly (2) has a plasticizing screw (7) arranged in a material cylinder (6).

6. Plasticizing unit according to the preceding claim, characterized in that at least one metering drive (19) is provided, which is configured for rotationally driving the plasticizing screw (7).

7. Plasticizing unit according to at least one of the preceding claims, characterized in that at least one injection actuator (25) is provided, which is configured for carrying out a linear injection movement of the plasticizing assembly (2).

8. Plasticizing unit according to at least one of the preceding claims, characterized in that at least one linear drive (8), preferably a linear drive (8) configured as a piston-cylinder unit (17) and/or a spindle drive, is provided, which is configured for linearly moving the plasticizing unit (1) and preferably pressing it onto a mold.

9. Plasticizing unit according to at least one of the preceding claims, characterized in that the at least one guide unit (11) has at least one guide rail (9), which is preferably connected in a kinematic lock with the frame, at least one guide rail (9) connecting the at least one component of the plasticizing unit (2) in a linearly movable manner with the frame (3).

10. Plasticizing unit according to the preceding claim, characterized in that the at least one guide unit (11) has at least one guide carriage (10), which is preferably connected in a kinematic lock with the at least one component of the plasticizing unit (2), the at least one guide carriage (10) being arranged on the at least one guide rail (9) in a linearly movable manner.

11. Plasticizing unit according to the preceding claim, characterized in that the at least one solid joint (4) is in the force flow between the at least one component of the plasticizing assembly (2) and the at least one guide carriage (10) during operation.

12. Plasticizing unit according to at least one of the preceding claims, characterized in that the at least one solid joint (4) is at least partially composed of a material having a smaller modulus of elasticity with respect to the at least one component, the plasticizing assembly (2) and/or the at least one guide unit (11), in particular with respect to the at least one guide rail (9) and/or the at least one guide carriage (10).

13. Plasticizing unit according to at least one of the preceding claims, characterized in that the at least one solid joint (4) has a sleeve (12) and an inner part (13) arranged in the sleeve (12), wherein at least one material having a smaller modulus of elasticity with respect to the sleeve (12) and/or the inner part (13) is arranged between the sleeve (12) and the inner part (13).

14. Plasticizing unit according to the preceding claim, characterized in that the sleeve (12) of the at least one solid joint (4) is connected with a kinematic lock to the at least one guide unit (11) and the inner part (13) is connected with a kinematic lock to the plasticizing assembly (2), wherein preferably the center line of the sleeve (12) extends vertically from the at least one guide unit (11) towards the at least one part of the plasticizing assembly (2).

15. Plasticizing unit according to claim 13 or 14, characterized in that the gap between the sleeve (12) and the inner part (13) varies in its cross-section in the circumferential direction of the inner part (13), the gap being filled by the at least one material with a lower modulus of elasticity.

16. Plasticizing unit for a molding machine, in particular according to one of the preceding claims, having a plasticizing assembly (2) for plasticizing and/or injecting plastic material and a frame, in particular an intermediate frame (3), for supporting at least one part of the plasticizing assembly (2), at least the at least one part of the plasticizing assembly (2) being supported on the frame in a linearly movable manner along a longitudinal axis (5) of the plasticizing assembly (2) by means of a guide unit (11), characterized in that at least the at least one part of the at least one plasticizing assembly (2) is supported by means of at least one solid joint (4) which is provided for the deformation of at least two shafts.

17. Moulding machine having at least one plasticizing unit (1) according to at least one of the preceding claims.