DE102011103609A1 - Horizontal injection molding machine comprises machine base, fixed mold clamping plate, movably mounted mold clamping plate arranged on horizontal columns, sliding table and driving device for moving sliding table - Google Patents

Abstract

Horizontal injection molding machine comprises a machine base (2), a mold clamping plate (3) arranged in a fixed manner with respect to the machine base, a movably mounted mold clamping plate (4) arranged on horizontal columns (5) in a horizontal direction with respect to the fixed mold clamping plate, a sliding table (7) displaceably mounted on the machine base, and a driving device for moving the sliding table. The driving device includes two spindles, an electric motor and a gear for adjusting positions of spindles on spindle nuts and drive for adjusting sliding table. Horizontal injection molding machine comprises a machine base (2), a mold clamping plate (3) arranged in a fixed manner with respect to the machine base, a movably mounted mold clamping plate (4) arranged on horizontal columns (5) in a horizontal direction with respect to the fixed mold clamping plate, a sliding table (7) displaceably mounted on the machine base in a linear manner, and a driving device for moving the sliding table. The driving device includes at least two spindles, where respectively a spindle nut is guided on each spindle, an electric motor arranged in a fixed location with respect to the machine base, and a gear coupled to the electric motor that is adapted for adjusting the relative positions of the spindles on the spindle nuts and for adjusting the sliding table using a drive of the electric motor.

Description

The invention relates to a horizontal injection molding machine, comprising a machine bed, with respect to the machine bed fixedly arranged platen, with respect to the fixed platen in a horizontal direction by means of horizontal columns movably mounted Platen, a sliding table, which is linearly displaceable on the machine bed and a drive device, which moves the sliding table is formed.

The WO 2006/106035 A1 describes a horizontal injection molding machine with a fixed and a movable platen, with running between the two platen columns, arranged between the platen and with hydraulic drive means parallel to the machine longitudinal axis movable base plate on which a turntable is rotatably mounted about a vertical axis, and with a mounted on the turntable mold half support for mold halves of injection molds. The horizontal injection molding machine has a yoke which extends between the upper columns and is displaceable relative to the latter and has a recess, wherein on the upper side of the middle mold carrier a pivot is provided which is rotatably arranged in the recess of the yoke. On both sides of the pivot further hydraulic drive means for displacing the yoke relative to this platen are provided between the yoke and one of the two platens. Between the yoke and the fixed platen two hydraulic actuators are provided at a distance from a rotary distributor. In cooperation with below the insert on a base plate attacking hydraulic actuators, the entire rotating device can be moved without risk of tipping when starting and braking along the machine axis.

The EP 2 199 056 A1 describes a two-plate clamping unit for an injection molding machine, comprising a machine bed, two mold platens movable relative to one another, of which one mold clamping plate is displaceable along guides on the machine bed and the other mold mounting plate is fixedly connected to the machine bed, at least one rapid lifting device for moving the mold mounting plates relative to each other, which has a rotatably connected to a platen and a spindle connected to the spindle and rotatably connected to the other platen spindle nut, designed as a hollow shaft motor electric motor for driving the spindle nut, wherein the spindle extends in sections in the hollow shaft and rotationally fixed is connected to the fixedly connected to the machine bed platen. A rigidly connected to a driver center plate is adjustably mounted by a single, centrally below four Zugholmen arranged hollow shaft motor on the movable platen form.

The object of the invention is to provide a horizontal injection molding machine with an alternative, in particular simple and / or cost-effective sliding table drive.

The object is achieved by a horizontal injection molding machine, comprising a machine bed, a relative to the machine bed fixedly arranged platen, with respect to the fixed platen in a horizontal direction by means of horizontal columns movably mounted Platen, a sliding table which is linearly displaceable on the machine bed and a drive device, the for moving the sliding table is formed, wherein the drive device comprises at least two spindles and one guided on each spindle spindle nut, and with respect to the machine bed stationarily arranged electric motor and a coupled to the engine gearbox, for adjusting the relative positions of spindles to spindle nuts is arranged to adjust the sliding table by driving the electric motor.

By the electric motor is stationary with respect to the machine bed, the electric motor does not constitute a mass to be moved. In contrast, in a mounted on the movably mounted platen motor whose mass would be moved when opening and closing the mold platens. With an electric motor according to the invention arranged stationary on the machine bed, the movably mounted platen has a lower mass to be moved, so that the platens can be opened and closed more quickly. In addition, the invention provides that the sliding table is moved by at least two spindles, resulting in a very rigid structure and a very uniform force application for moving the sliding table. By according to the invention, the at least two spindles are driven by a common electric motor, the torque provided by the electric motor can be particularly evenly distributed to the at least two spindles. In order to distribute the torque to the at least two spindles, the drive device according to the invention has a transmission.

In the horizontal injection molding machine according to the invention can separate so far Be provided adjusting spindles and / or a separate electric motor for moving the sliding table and separate traction spindles or motors for moving the movably mounted platen and / or for pressing together the two platens may be provided.

The electric motor and the transmission may be stationarily arranged with respect to the machine bed. Thus, it can be provided that not only the electric motor with respect to the machine bed is arranged stationary, but also the transmission is stationary with respect to the machine bed. Thus, the gear must not be moved with the sliding table or the movably mounted platen, whereby these can be freed from the mass of the transmission. The electric motor and the transmission can be arranged in particular in a plane below the fixed platen.

The transmission can be designed to move spindles fixedly connected to the sliding table by means of rotatably mounted spindle nuts. Alternatively, the transmission may be configured to move fixedly connected to the sliding table spindle nuts by rotatably mounted spindles.

In a specific embodiment, the transmission can have an input member coupled to the electric motor and connected in particular to a motor shaft of the electric motor, and at least two output members, each of which is coupled to one of the spindles, in particular connected. In particular, the transmission may comprise a single input member coupled to a single electric motor, in particular to a motor shaft of the single electric motor, and at least two output members, each of which is coupled to one of the spindles, in particular connected. Each output member may be coupled via a hinge with an associated spindle. Alternatively, each output member may be directly attached to the associated spindle, in particular by a positive or frictional shaft-hub connection, such as a spline or a press fit and thereby connected to the spindle. Optionally, the output member may also be integrally formed with the spindle. The at least two spindle nuts can be connected to the sliding table, in particular attached to the sliding table.

In an alternative embodiment, the transmission may comprise an input member coupled to the electric motor, in particular to a motor shaft of the electric motor, and at least two output members, each of which is coupled to one of the spindle nuts, in particular. In particular, the transmission may comprise a single input coupled to a single motor, in particular to a motor shaft of the single electric motor, and at least two output members, each of which is coupled to one of the spindle nuts, in particular. Each output member may be coupled via a hinge with an associated spindle nut. Alternatively, each output member can be attached directly to the associated spindle nut in particular by a positive or frictional shaft-hub connection, such as a splined shaft profile or a press-fit and thereby be connected to the spindle nut. Optionally, the output member may also be formed integrally with the spindle nut. The at least two spindles can be connected to the sliding table, in particular be attached to the sliding table.

The electric motor and the transmission can be mounted in all versions of the machine bed.

The electric motor can be arranged between two spindles, in particular in an intermediate space of two parallel spindles. By providing two spindles for moving the sliding table, which are spaced apart from each other, an injection molding workpiece made in the horizontal injection molding machine can be removed from the horizontal injection molding machine between the two spindles. In particular, removal of the injection-molded workpiece downwards from the horizontal injection molding machine can take place. In addition, two spindles can be arranged symmetrically, so that no additional moment can act on linear guides of the sliding table, as would be the case for example with a single, eccentrically arranged spindle.

In general, the transmission can have at least one belt, in particular at least one toothed belt, which transmits and / or distributes a torque applied to the input member by the electric motor to the at least two output members.

As an alternative to belts, the transmission may comprise at least one gear pair which transmits a torque applied to the input member by the electric motor to the at least two output members.

An embodiment of the invention is shown by way of example in the accompanying schematic figures. Show it:

1 a side view of a horizontal injection molding machine with an inventive, electric motor driven sliding table;

2 a plan view of the horizontal injection molding according to 1 ;

3 a cross-sectional view of the horizontal injection molding according to 1 along the section line AA;

4 a side view of the electric motor driven sliding table according to 3 ;

5 a perspective view of the invention, driven by electric motor sliding table in isolation;

6 a sectional view through the electric motor driven sliding table according to 4 along the section line BB; and

7 a sectional view through the electric motor driven sliding table according to 4 along the section line CC.

In the 1 is an exemplary horizontal injection molding machine 1 shown. The horizontal injection molding machine 1 has a machine bed 2 on. On the machine bed 2 is a fixed platen 3 attached and a movable platen 4 linearly displaceable. For their linearly displaceable storage is the movable platen 4 along four horizontal columns 5 slidably mounted. The movable platen 4 For example, by hydraulic actuators, not shown along the longitudinal extent of the four horizontal columns 5 to be moved. The movable platen 4 is through linear guides 6 horizontally movable on the machine bed 2 stored. Along the linear guides 6 or on separate additional linear guides is a sliding table 7 linearly displaceable on the machine bed 2 stored. On the sliding table 7 is a mold carrier plate in the illustrated embodiment 8th that a turning plate 8a may be fixed or mounted for example rotatable about a vertical axis. The sliding table 7 is by means of a drive device 9 along the linear guides 6 or actively adjustable along separate additional linear guides. By such active adjustment, the on the sliding table 7 fixed mold carrier plate 8th or the one on the sliding table 7 turning insert rotatable about a vertical axis 8a for example, on the fixed platen 3 to be moved or moved away from it.

In the 2 is the drive device 9 in a plan view of the horizontal injection molding machine 1 shown in more detail. The drive device 9 has at least one first spindle 10 and a second spindle 11 on. In the illustrated embodiment, the two spindles 10 . 11 via one connecting rod each 12 . 13 firmly with the sliding table 7 connected. For this purpose, respective first ends of the connecting rod 12 . 13 with a side wall 14 of the sliding table 7 connected and the respective second ends of the connecting rod 12 . 13 each with a front end of the spindles 10 . 11 connected. One spindle each 10 . 11 and a connecting rod 12 . 13 but can also be formed in one piece.

Furthermore, the drive device 9 in the exemplary embodiment two spindle nuts 15 . 16 on. One spindle nut each 15 . 16 is on one of the two spindles 10 . 11 guided. An electric motor 17 is with respect to the machine bed 2 fixedly arranged. The electric engine 17 is with a gearbox 18 coupled, for adjusting the relative positions of spindles 10 . 11 to spindle nuts 15 . 16 is set up to the sliding table 7 by driving the electric motor 17 along the linear guides 6 or to actively adjust along separate additional linear guides.

The gear 18 is in the following 3 to 5 shown in more detail and explained in more detail. The gear 18 has an input member 19 on. The input member 19 is with a motor shaft 20 of the electric motor 17 rotatably connected. The input member 19 is in the embodiment as a drive pulley 19a educated. The drive pulley 19a is designed in two lanes and carries a first strap 21 and a second belt 22 , The slack side of the first belt 21 is in the embodiment by a first tensioning roller 23 biased. The slack side of the second belt 22 is in the embodiment by a second tension roller 24 biased. The first belt 21 transmits part of the motor shaft 20 in the transmission 18 introduced torque to a first output-side output member 25 , The second belt 22 transmits part of the motor shaft 20 in the transmission 18 introduced torque to a second output-side output member 26 , This embodiment of the transmission 18 is not only in 3 represented, but in particular in 4 shown enlarged.

As the 5 clearly shown transmits in the embodiment of the first belt 21 a part of the motor shaft 20 in the transmission 18 introduced torque to the first output-side output member 25 , The first output-side output member 25 can from a first output pulley 25a be formed with the first spindle nut 15 is connected or the one-piece with the spindle nut 15 is trained. The second belt 22 transmits part of the motor shaft 20 in the transmission 18 introduced torque to the second output-side output member 26 , The second output-side output member 26 can from a second driven pulley 26a be formed with the second spindle nut 16 is connected or the one-piece with the spindle nut 16 is trained.

The electric engine 17 is in a gap 27 between the two parallel spindles 10 . 11 for example, at the same height, ie arranged on the same level. The gear 18 and the electric motor 17 can on a carrier plate 29 be constructed. For this example, the carrier plate 29 be formed, the two spindle nuts 15 . 16 in a defined distance from each other, in particular torsionally rigid to store. On a first side wall of the carrier plate 29 can the input member 19 or drive pulley 19a , the two output members 25 . 26 or the two driven pulleys 25a . 26a and the two belts 21 . 22 be arranged. On an opposite second side wall of the carrier plate 29 can the electric motor 17 be arranged, the motor shaft 20 through an opening in the carrier plate 29 protrudes to the first side wall. On a bottom wall 30 the sliding table 7 can guide elements 31 the separate linear guides or the linear guides 6 be arranged.

In the 6 is a section through the electric motor 17 along the section line BB according to 4 shown. The electric engine 17 is on the carrier plate 29 flanged. The motor shaft 20 protrudes through the opening in the carrier plate 29 therethrough. On the free end of the motor shaft 20 sits the input member 19 , The input member 19 For example, on the free end of the motor shaft 20 frictionally pressed or rotationally fixed to the motor shaft via a positive splined connection 20 be connected. In the illustrated embodiment, the input member 19 and the drive pulley 19a formed in two parts, ie the drive pulley 19a sits non-rotatably on the input member 19 , The carrier plate 29 is fixed to the machine bed 2 connected.

In the 7 is a section through the second spindle nut 16 along the section line CC according to 4 shown. On the side wall 14 the sliding table 7 is the connecting rod 13 coupled. The connecting rod 13 is at its opposite end to the second spindle 11 connected. On the second spindle 11 rotatably seated the second spindle nut 16 , The spindle nut 16 is by means of an exemplary tapered roller bearing 33 , in particular in employed O-arrangement, rotatable in a spindle nut housing 34 stored. The spindle nut housing 34 is firmly attached to the carrier plate 29 flanged. The carrier plate 29 is in turn stuck to the machine bed 2 connected. For a precise, in particular positionally accurate attachment is the support plate 29 over at least a passport pin 35 on the machine bed 2 established. About the second output-side output member 26 , or via the second output pulley 26a becomes the second spindle nut 16 set in rotation. Due to the rotatable but fixed in the axial direction storage of the second spindle nut 16 in the spindle nut housing 34 or with respect to the machine bed 2 specified storage is due to the rotating spindle nut 16 the second spindle 11 moved in its axial longitudinal extent and consequently the sliding table 7 on the linear guides 6 emotional.

LIST OF REFERENCE NUMBERS

1

Horizontal injection

2

machine bed

3

fixed platen

4

movable platen

5

Horizontal columns

6

linear guides

7

sliding table

8th

Platen

8a

insert

9

driving device

10

first spindle

11

second spindle

12, 13

connecting rod

14

Side wall

15

first spindle nut

16

second spindle nut

17

electric motor

18

transmission

19

input member

19a

Drive pulley

20

motor shaft

21

first belt

22

second belt

23

first tension roller

24

second tensioner

25

first output-side output member

25a

first output pulley

26

second output-side output member

26a

second output pulley

27

gap

29

support plate

30

bottom wall

31

guide elements

33

Tapered roller bearing

34

Spindle nut housing

35

Dowel pin

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2006/106035 A1 [0002]
• EP 2199056 A1 [0003]

Claims (10)

Horizontal injection molding machine, comprising a machine bed ( 2 ), one relating to the machine bed ( 2 ) fixedly arranged platen ( 3 ), one with respect to the fixed platen ( 3 ) in a horizontal direction on horizontal columns ( 5 ) movably mounted platen ( 4 ), a sliding table ( 7 ), which is linearly displaceable on the machine bed ( 2 ) is mounted and a drive device ( 9 ) used to move the sliding table ( 7 ), characterized in that the drive device ( 9 ) at least two spindles ( 10 . 11 ) and one on each spindle ( 10 . 11 ) guided spindle nut ( 15 . 16 ), as well as with respect to the machine bed ( 2 ) fixedly arranged electric motor ( 17 ) and one to the engine ( 17 ) coupled transmission ( 18 ) for adjusting the relative positions of spindles ( 10 . 11 ) to spindle nuts ( 15 . 16 ) is set up to the sliding table ( 7 ) by driving the electric motor ( 17 ) to adjust. Horizontal injection molding machine according to claim 1, characterized in that the electric motor ( 17 ) and the transmission ( 18 ) with regard to the machine bed ( 2 ) are arranged stationary. Horizontal injection molding machine according to claim 1 or 2, characterized in that the transmission ( 18 ) with the electric motor ( 17 ) coupled, in particular with a motor shaft ( 20 ) of the electric motor ( 17 ) connected input element ( 19 . 19a ) and at least two output members ( 25 . 26 . 25a . 26a ), each with one of the spindles ( 10 . 11 ), in particular connected. Horizontal injection molding machine according to claim 3, characterized in that the at least two spindle nuts ( 15 . 16 ) with the sliding table ( 7 ), in particular on the sliding table ( 7 ) are attached. Horizontal injection molding machine according to claim 1 or 2, characterized in that the transmission ( 18 ) with the electric motor ( 17 ) coupled, in particular with a motor shaft ( 20 ) of the electric motor ( 17 ) connected input element ( 19 . 19a ) and at least two output members ( 25 . 26 . 25a . 26a ), each of which is connected to one of the spindle nuts ( 15 . 16 ), in particular connected. Horizontal injection molding machine according to claim 5, characterized in that the at least two spindles ( 10 . 11 ) with the sliding table ( 7 ), in particular on the sliding table ( 7 ) are attached. Horizontal injection molding machine according to one of the preceding claims, characterized in that the electric motor ( 17 ) and the transmission ( 18 ) on the machine bed ( 2 ) are attached. Horizontal injection molding machine according to one of the preceding claims, characterized in that the electric motor ( 17 ) between two spindles ( 10 . 11 ), in particular in a gap ( 27 ) of two parallel spindles ( 10 . 11 ) is arranged. Horizontal injection molding machine according to one of the preceding claims, characterized in that the transmission ( 18 ) at least one belt ( 21 . 22 ), in particular at least one toothed belt, which on the input member ( 19 . 19a ) of the electric motor ( 17 ) applied torque on the at least two output members ( 25 . 26 . 25a . 26a ) transmits. Horizontal injection molding machine according to one of the preceding claims, characterized in that the transmission ( 18 ) has at least one pair of gears, which on the input member ( 19 . 19a ) of the electric motor ( 17 ) applied torque on the at least two output members ( 25 . 26 . 25a . 26a ) transmits.

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