CN101001735A

CN101001735A - Drive for an index plate of an injection molding tool

Info

Publication number: CN101001735A
Application number: CNA2005800269534A
Authority: CN
Inventors: U·施泰因迈尔
Original assignee: KRAUS-MAFFEI PLASTIC INDUSTRY AG
Current assignee: KRAUS-MAFFEI PLASTIC INDUSTRY AG
Priority date: 2004-08-18
Filing date: 2005-07-22
Publication date: 2007-07-18
Anticipated expiration: 2025-07-22
Also published as: KR101196499B1; KR20070049161A; DE102004040109B4; WO2006018364A1; CN101001735B; AT505692B1; DE102004040109A1; AT505692A5; WO2006018364A9

Abstract

The invention relates to a drive device for a displacement plate (8) of an injection molding tool for an injection molding machine, particularly for a multicomponent or multicolor injection molding machine. The invention is characterized in that the rotating shaft has at least one first rear part serving as a driving portion (21) and has at least one second front part, which is connected to the displacement plate (8) and which serves as a supply part (22), in which channels (24, 25, 38) are located for supplying the displacement plate (8) with liquid or gaseous media and/or for leading through electric or fiber-optic lines. Both portions are preferably connected to one another by a releasable coupling (16). By separating the functions of rotational drive and media supply, the diameter of the supply part can be adapted to the respective conditions. On the other hand, the driving portion can be specifically designed for an optimal driving power.

Description

The drive unit of the index plate of injection mold

Technical field

The present invention relates to a kind ofly to be used for injection machine, be used in particular for the drive unit of index plate of injection mold of multi component injection molding machine or multi-color injection molding machine and the injection machine that is equipped with such drive unit.

Background technology

For the known the whole bag of tricks of moulding of making multicomponent or polychrome.In so-called index plate method injection mold is modified as the 3rd an additional dish is set between two basic half modules, it is referred to as index plate.This index plate can and can move axially along mechanical longitudinal direction around central axis rotation.Index plate constitutes a core of die cavity, forms a pre-injection-molded item in die cavity, and it can remain unchanged.Unclamping after the fixing mold members index plate Rotate 180 ° and changing pre-injection-molded item over to second die cavity, can spray second component therein.

By the known various schemes that comprise the injection machine of an index plate of DE 101 45 461 A1.

Movably fixing a whirligig on the mold cramping plate in the scheme of describing in Fig. 1 to 5 of DE 101 45 461 A1, it consists essentially of a housing, a rotatably mounted therein gear.This gear is hollow in inside and is shaped on a multiple-grooved profile.The rotating shaft of index plate has a multiple-grooved profile that is mated and extends through gear.Rotating shaft is connected in index plate and is connected in a straight line drive unit with its other end with an end of its die side, for example is connected in a hydraulic cylinder, thereby index plate can shift out and shift-in from fixing mould.The housing of whirligig is provided with a tooth bar perpendicular to mechanical longitudinal axis, and it is meshed with gear and can seesaws by means of hydraulic cylinder.Gear rotation one angle and the more definite theory that is equivalent to the stroke of tooth bar is alternately rotated with counter-clockwise direction all the time along clockwise direction.

For rotatablely moving of index plate a hydraulic motor or motor are set in the scheme of in Fig. 6 to 11 of DE 101 45 461 A1, describing, it is put in the groove of mold cramping plate movably and has a hollow shaft, and this hollow shaft has the multiple-grooved profile of the multiple-grooved profile of the rotating shaft that is equivalent to index plate.Be different from Fig. 1 to 5, can save an independent whirligig between injection mold and clamping plate now with rack pinion transmission.The advantage that motor also has is that the rotating shaft of index plate can and be parked in any position, angle to each direction rotation arbitrarily.Be different from the rack pinion transmission, can make index plate when needed especially all the time along a direction rotation.

Disadvantageously to known index plate at first be that owing to the reason of drive technology does not allow rotating shaft to have too big diameter, this makes the guiding difficulty of passing the axial rotary index plate from register, supply lines etc.Another shortcoming is, bearing with rotating shaft of multiple-grooved profile suffers a higher load, because rotating shaft only is supported in the bearing with the part of its outer surface, that is the only spline supporting to protrude from rotating shaft, in the zone of groove, cancelled area supported in contrast.This causes adverse influence especially in heavy index plate.

Summary of the invention

The objective of the invention is in view of the above, a kind of index plate that is used for injection machine is provided, it has the free degree of raising and be not subjected to tangible restriction aspect its weight in the medium supply process of index plate.Another is based on the objective of the invention is to, a kind of injection machine is provided, and it can be used with the Standard Module clamping plate and can alternately be used for index plate operation (multi component injection molding or multi-color injection molded) and be used for the operation of a no index plate and do not need bigger transformation.

The drive unit of the feature by having claim 1 reaches described first purpose.The injection machine of the feature by having claim 9 reaches described second purpose.In all dependent claims, obtain favourable form of implementation and further exploitation.

By rotating shaft constitute manifold and part with at least one back as the fixing part on index plate of a drive part and a front as supply section, the rotation driving of index plate and the function of medium supply can be separated from each other.Particularly can make the diameter of supply section be matched with respective conditions, thus finally index plate with temperature control medium for example cooling water or oil or with compressed-air actuated supply in the signal of telecommunication that conductor wire is used for for example being positioned at the sensor of index plate also can be set in fact without limits and when needed.Otherwise, can press a driving power design driven part of optimizing especially, that is the diameter of drive part can be significantly less than the diameter of supply section.

Advantageously realize being connected of drive part and supply section via a separable coupling, thereby index plate can remove from injection machine together with supply section and injection machine can utilize other Tool and Die Technology to operate in the one pack system injection moulding process or in the multi component injection molding method now, and drive part can be retained on the injection machine together with rotating driving device and linear drive apparatus.For again a replacing so that multi component injection molding or multi-color injection moldedly be easy to install once more index plate and supply section.Still be installed in injection machine owing to be used for remaining part of index plate operation, only supply section and drive part need be interconnected, thereby injection machine does not have big time consumption just can enter multicomponent operation or polychrome operation now.

When the rotating driving device of drive part is fixed on the support plate of scraping wings, obtain a simple especially structure, and drive part passes scraping wings and support plate and backward beyond the Extension support plate.Rotating driving device immovably is fixed on the support plate and drive part has a multiple-grooved profile in this case, itself and one be halved together by the drivable hollow shaft of rotating driving device with a multiple-grooved profile that is mated.

But rotating driving device also can be fixed on scraping wings and originally play motion on one's body and with one.Can fix a belt wheel or a gear in this case on drive part, they are driven by rotating driving device.

Another advantage is, supply section has a smooth cylindrical surface and can stably be supported in the sliding sleeve that cooperates of mold cramping plate.Be different from a small area supported with rotating shaft of multiple-grooved profile, whole here surface can be used for the bearing supporting.

Description of drawings

Below illustrate in greater detail the present invention by an embodiment and with reference to accompanying drawing.Wherein:

Fig. 1: the side view of the part of an injection machine comprises the partial sectional view of the index plate with shift-in;

Fig. 2:, but have the index plate that shifts out as Fig. 1;

Fig. 3: the vertical view along the direction of the arrow A among Fig. 1 and Fig. 2 of injection machine.

The specific embodiment

As conspicuous by Fig. 1 to 3, itself is known and therefore not in greater detail on the mold cramping plate 1 of injection machine one, by the fixing half module that is used for multicomponent or multi-color injection molded method 2 of injection mold of the index plate under the centre position of operation centering ring 3.Except " traditional " multi component injection molding, the hierarchy of the moulding of being made by same plastics also can be understood as multi component injection molding.Can adopt the Standard Module clamping plate that has according to the drill drawing of EUROMAP (the European plastics and the committee of rubber manufacturing machinery manufacturer).Half module 2 consists essentially of a substrate 4, each supporting slat 5 and one has the template 6 of the groove 7 of index plate 8 usefulness.Be provided with each pusher pin 9 in addition, it can be by the center traction control.Each is sold in the hole of 10 cooperations of inserting index plates and current does not need as the pusher pin.Also be provided with sliding sleeve 11 in this external mold cramping plate 1 and in substrate 4 and in template 6, it can distinguish or make up setting according to applicable cases.In the back of mold cramping plate 1, a scraping wings 12 with each guide pin bushing 13 can move along the machine longitudinal direction on each pilot pin 14 between a support plate 15 and the mold cramping plate 1.Support plate 15 is fixed on the mold cramping plate 1 by means of the screw that passes pilot pin 14 guiding.Can make scraping wings 12 shift to mold cramping plate 1 and move apart by means of two hydraulic cylinders 17 that in a plane, are provided with and 18 (see figure 3)s from this mold cramping plate on the left side of central axis and the right.

Index plate 8 is connected in a rotating shaft, and this rotating shaft passes hollow shaft 19 extensions of half module 2, mold cramping plate 1, scraping wings 12, support plate 15 and rotating driving device 20 and stretches out one section backward from hollow shaft 19.Rotating driving device 20 can be designed as motor, for example is designed to have the servo drive of a suitable transmission mechanism or also can constitutes hydraulic motor.Rotating shaft has the drive part 21 of a back, and it is designed to have the driving shaft of multiple-grooved profile, that is a so-called shaft with key way, and is meshed with the multiple-grooved profile of hollow shaft 19.Driving shaft also can be designed as and has a single channel profiles in case of necessity, and hollow shaft 19 has a corresponding adapter ring (Steg) in this case.This drive part 21 passes support plate 15 and scraping wings 12 extends.Interconnect via a separable coupling 16 at the right of scraping wings 12 drive part 21 and supply section 22.Drive part 21 axial restraints but be rotatably supported in the scraping wings 12.Supply section 22 has single-revolution joint 23 at its end away from index plate 8, this swivel coupling have a plurality of around cannelure 26, in this cannelure, feed the passage of the medium supply be used for index plate.In two passages 24 shown in the current example and 25, for example be used for a cooling liquid or in general be used for a temperature control medium.Can relate to water or oil in this respect.Can guide compressed air into index plate 8 via the passage in the supply section in addition, for example pass a passage 38 by drive part 21 and supply section 22 extensions.Electric lead can be drawn from passage 38 via the outlet on the rear end of drive part 21 39 and/or via the outlet 40 of a side, but continuous rotation is impossible under one situation of back.Also can lay the fiber optics lead when needing, replace in this case or be additional to cable by passage 38.Swivel coupling 23 is fixed on the supply section 22 by means of retaining ring 29 in current example and is that revolution is fixing with respect to scraping wings 12, for example by means of one or more crossbeams 36 fixing on scraping wings 12; But crossbeam 36 also can be fixed on the mold cramping plate 1.

Sealing ring

27 and 28 guarantees being connected with respect to the sealing of supply section.

Torque transmission between driving shaft 21 and supply section 22 can be for example be connected via the sunk key of drive part 21 and supply section 22 and realizes.Shaft coupling housing 16 comprises two

halves shell

32 and 33, and they embed in the cannelure in the supply section 22 under assembled state and the head of back side interlocking drive part 21.Two

halves shell

32 and 33 interfixes and is fixed on the scraping wings 12 by means of other screw (being shown among the figure by a dotted line) by means of screw 34 and 35.On the one hand drive part 21 and supply section 22 rotations are fixedly connected to each other and both are connected in scraping wings 12 via embedding jointly

half shell

32 and 33 axial restraints in the cannelure in such a way.

Fig. 1 illustrates the position of index plate 8 at home position.Just can make a pre-injection-molded item by the die cavity that injection mold shift-in first is for example following now.Subsequently injection mold is stretched out.Scraping wings 12 can be shifted to mold cramping plate 1 by means of

hydraulic cylinder

17 and 18 now, thereby index plate 8 is shifted out groove 7 (see figure 2)s.Operation index plate 8 desired angles of rotation and shift-in groove 7 now once more by rotating driving device 20.For this reason to

hydraulic cylinder

17 and 18 supply pressure medium and in the opposite direction to rear haulage scraping wings 12.Shift-in injection mold again later in the present superincumbent die cavity with another component or dyestuff around spraying pre-injection-molded item.After reopening injection mold, can release the moulding of making by means of pusher pin 9.

List of numerals

1 mold cramping plate

2 half modules

3 centering rings

4 substrates

5 supporting slats

6 templates

7 grooves

8 index plates

9 pusher pins

The pin of 10 no pusher functions

11 sliding sleeves

12 scraping wings

13 guide pin bushings

14 pilot pins

15 support plates

16 shaft coupling housings

17 hydraulic cylinders

18 hydraulic cylinders

19 have the hollow shaft of multiple-grooved profile

20 rotating driving devices

21 drive parts or shaft with key way

22 supply sections

23 swivel couplings

24 passages

25 passages

26 cannelures

27 sealing rings

28 sealing rings

29 retaining rings

32 the first half shells

33 the second half shells

34, the mutual hold-down screw of 35 half shells

36 crossbeams

37 medium joints (water, oil, air)

The passage of 38 electric leads

First outlet of 39 electric leads

Second outlet of 40 electric leads

Claims

1. be used for the drive unit of index plate that injection machine is used in particular for the injection mold of multi component injection molding machine or multi-color injection molding machine, comprise the rotating shaft on the index plate of being fixed on of a rotatable driving and linear drives; It is characterized in that, rotating shaft has at least one first and at least one second portion as the front that is connected in index plate (8) of supply section (22) as the back of drive part (21), have passage (24,25,38) in supply section, described passage is used for to index plate (8) supply medium liquid or gaseous state and/or is used to pass electric wire or the fiber optics lead.

2. according to the described drive unit of claim 1, it is characterized in that, drive part (21) has a channel profiles, a particularly single channel profiles or a multiple-grooved profile, this channel profiles is meshed with the hollow shaft with a channel profiles that is mated (19) of rotatable driving, and is provided with the rotating driving device that is used for hollow shaft (19) (20) of a fixed-site.

3. according to the described drive unit of claim 1, it is characterized in that, drive part (21) but by the rotating driving device of an axial servo-actuated for example via the band transmission and belt wheel fixing on the drive part or back-geared motor and on drive part fixing gear drive.

4. according to one of claim 1 to 3 described drive unit, it is characterized in that drive part (21) and supply section (22) interconnect via a separable coupling (16), the particularly shaft coupling of a multi-piece type.

5. according to one of claim 1 to 4 described drive unit, it is characterized in that, single-revolution joint (23) is set on the part of supply section (22), in this part, in supply section (22), extend be used for medium for example the passage (24,25) of oil, water and/or air at the surface opening of supply section (22) and feed in the affiliated cannelure (26) of swivel coupling (23).

6. according to one of claim 1 to 4 described drive unit, it is characterized in that, supply section (22) particularly has an end face in the zone of shaft coupling (16) at it towards an end of drive part, and in supply section, extend be used for medium for example the passage (24,25) of oil, water and/or air at the surface opening of this end face, thereby can connect the flexible pipe that is used for these media there.

7. according to one of claim 1 to 6 described drive unit, it is characterized in that the diameter of supply section (22) is greater than the diameter of drive part (21).

8. according to one of claim 1 to 7 described drive unit, it is characterized in that, be provided with one and pass passage (38) drive part (21) and supply section (22), that be used for electric lead and/or fiber optics lead.

9. one kind comprises index plate and according to the injection machine of one of claim 1 to 8 described drive unit, it is characterized in that, rotating shaft, particularly drive part (21) axial restraint ground but be rotatably supported in the scraping wings (12) of injection machine.

10. according to the described injection machine of claim 9, it is characterized in that, rotating shaft, particularly drive part (21) pass the hole guiding in the scraping wings (12), thereby stretch out scraping wings (12) behind this axial rotary in addition, and the rotating driving device (20) of hollow shaft (19) is arranged on the back of scraping wings (12).

11. according to the described injection machine of claim 10, it is characterized in that, one fixing support plate (15) is set, this support plate has the drive unit (17,18) that is used for scraping wings (12), rotating shaft, particularly drive part (21) pass the hole guiding in scraping wings (12) and the support plate (15), thereby Extension support plate (15) in addition behind this axial rotary, and a rotating driving device (20) that is used for hollow shaft (19) is set on support plate (15).

12. according to one of claim 9 to 11 described injection machine, it is characterized in that, the shaft coupling (16) of drive part (21) and supply section (22) is arranged on the side away from support plate (15) of scraping wings (12), and shaft coupling (16) has a housing (32,33), and this housing is fixed on the scraping wings (12).

13., it is characterized in that the swivel coupling (23) that is used for supply section (22) is that revolution is fixing in the side away from support plate (15) of scraping wings (12) with respect to scraping wings (12) according to one of claim 9 to 12 described injection machine.

14., it is characterized in that in the mold cramping plate for index plate (8) configuration a hole is set, this hole has sliding sleeve (11), is used for the supply section (22) of the drive unit of index plate (8) according to one of claim 9 to 13 described injection machine.

15. according to one of claim 9 to 14 described injection machine, it is characterized in that, be provided with and have a Standard Module clamping plate by the drill drawing of EUROMAP.