WO1997007957A1 - Spritzgiesseinheit für eine kunststoff-spritzgiessmaschine - Google Patents
Spritzgiesseinheit für eine kunststoff-spritzgiessmaschine Download PDFInfo
- Publication number
- WO1997007957A1 WO1997007957A1 PCT/DE1996/001531 DE9601531W WO9707957A1 WO 1997007957 A1 WO1997007957 A1 WO 1997007957A1 DE 9601531 W DE9601531 W DE 9601531W WO 9707957 A1 WO9707957 A1 WO 9707957A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- injection
- injection molding
- molding unit
- bridge
- spindle
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/03—Injection moulding apparatus
- B29C45/07—Injection moulding apparatus using movable injection units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
- B29C45/5008—Drive means therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
- B29C45/5008—Drive means therefor
- B29C2045/5084—Drive means therefor screws axially driven by roller elements
Definitions
- the invention relates to an injection molding unit for a plastic injection molding machine for processing plastifiable compositions such as plastics, powdery and ceramic compositions according to the preamble of claim 1.
- Such an injection molding unit is known from EP-B 427 866. It is a two-plate system with a support block as the front plate and an injection bridge as the rear plate. The plasticizing cylinder is attached to the support block. A screw conveyor penetrates the support block and is rotatably mounted on the injection bridge. The metering motor is driven via a metering motor which is arranged on the injection bridge and projects in the direction between the carrier block and the space between the carrier block and the injection bridge. Likewise, the injection motor is arranged in the vertical projection between the support block and the injection bridge and drives two spindle drives via a belt drive which, when actuated, move the injection bridge towards the support block and away from the support block. This movement also creates the axial
- REPLACEMENT BLADE (RULE 26) movement of the screw conveyor.
- the injection engine is arranged in such a way that its overall length determines the minimum distance between the support block and the injection bridge. Since the overall length of the injection motor also increases with increasing torque, this construction places natural limits on a compact construction of the injection molding unit.
- a drive unit for moving the plasticizing cylinder towards the mold is not integrated in the injection molding unit.
- An injection molding unit is known from EP-A 576 925, in which a carrier block is mounted on the stationary mold carrier via bars. Connected in series on the spars are a drive unit designed as a hollow shaft motor for applying the nozzles to the injection mold and an injection unit which generates the axial movement of the screw conveyor within the plasticizing cylinder during injection.
- the rotary motor for the rotation of the screw conveyor is provided on an injection bridge.
- a two-platen system is also known from DE-C 43 17 998, but the drive unit for applying the nozzle to the injection mold is integrated into the injection molding unit.
- Electric motors serve as drives, which drive hollow shafts of the drive unit and the injection unit, which are nested into one another via belt drives. This results in a space-saving design, but this arrangement creates an imbalance as a result of the rotary motor arranged at the rear end of the injection bridge, since the rotary motor lacks the counterweight on the injection molding unit due to the nesting of the drive unit and the injection unit.
- Belt drives have also proven to be short-lived, fragile and imprecise. Summary of the invention
- the present invention is based on the task of creating a compact injection molding unit which is independent of the overall length of the injection engine.
- the injection bridge has a recess, recess or bore in which the injection motor is located, so that the support block and injection bridge can be moved towards one another to a minimum distance.
- the overall length of the injection engine is thus "parallel" to the maximum movement stroke of the injection bridge while minimizing the space required otherwise for both units in succession. This minimum distance does not change in the case of larger machines either, since even if a greater torque of the engine is required and thus its overall length increases, this has no influence on the minimum distance from the carrier block and the injection bridge.
- the injection bridge is therefore basically run over 1 by the injection bridge.
- FIG. 2 is a side view of the injection molding unit in the direction of arrow 2 of FIG. 1,
- FIG. 3 shows a section through an injection molding unit according to line 3-3 of FIG. 1,
- FIG. 4 shows an enlarged detail from the injection molding unit in a view according to FIG. 1 in the region of the carrier block
- FIG. 5 is a view of the injection molding unit along line 5-5 of FIG. 1, 6 shows a view according to FIG. 1 with a drive unit in a further embodiment, FIG. 7 shows an enlarged section from FIG. 6 in the area of the drive unit, FIG. 8 shows an enlarged section from FIG. 7 in the area of the hollow shaft motor.
- the injection molding unit is used for metering and injecting plasticized material, such as Plastics, pulverulent masses and ceramic masses in a mold cavity 80 of a mold M, which can be attached in part to a stationary mold carrier 35 of a mold clamping unit. With a nozzle D, the injection molding unit lies against the injection mold.
- Fig. 2 shows the structure of the injection molding unit.
- the injection molding unit has a carrier block 10, by means of which the injection molding unit is essentially supported on a machine frame 81. The support takes place with the interposition of two strips 62 which carry guide rails 19 on their upper side. Nevertheless, the injection molding unit together with its support can be moved as a structural unit and e.g. can be moved into the parting line for injection.
- An injection bridge with supports 25a is supported on the guide rails in the direction of the spray axis s-s. Carrier block 79 and injection bridge 25 can be moved along the guides with guide shoes 79, the movement to the rear being limited by a stop 19b.
- a receptacle body 17 is arranged on the front side of the support block 10 which faces the stationary mold support 35.
- the receiving body 17 receives a plasticizing cylinder in which a conveying means 72 is arranged in the form of a feed piston or a screw conveyor.
- the funding passes through the carrier block 10 and is mounted on the injection bridge 25.
- the plasticizing cylinder is via a nut 34 on the back of the support block 10 can be determined.
- the injection movement is brought about by several spindle drives E, preferably ball screw drives.
- the spindle drive has a nut 11 which is arranged on the injection bridge 25 in a manner fixed against relative rotation.
- the nut 11 can be fixed on the injection bridge via a holding plate 12 in connection with clamping bolts 12a and can be adjusted by correspondingly adjusting the clamping bolts in order to ensure that the two are largely parallel To achieve injection units.
- the spindle 18 of the spindle drive E is rotatably mounted in the formations 10a of the carrier block 10. On the side of the injection bridge 25 pointing in the direction of the support block, the spindles 18 emerge from the injection bridge with a region 18a of reduced diameter.
- This reduced diameter is connected via bearings 23, 23a to a gear 41, of which the driven gear can be seen in FIG. 4.
- This transmission is driven on the carrier block by an injection motor 51.
- the spindle drive E is fastened to the support block 10 via the counter bearing 21.
- Spindle 18 and nut 11 can, however, also each be operated in the reverse manner, so that, for example, the nut is supported on the carrier block 10 and the spindle on the injection bridge 25.
- the function can be reversed for all spindle drives of spindle and nut by - if necessary with the interposition of rolling or rolling elements - a tubular, external, long part is inserted as a 'spindle' with an internal profile, into which a short spindle head acts as a 'nut''immersed with external profiling.
- the spindle 18 itself is a hollow spindle, in the cavity 18b of which a stop 63 can be fixed.
- 5 has a recess 25b, in which the injection motor 51 comes to rest at least in the foremost position of the conveying means 72. Instead of the recess, recesses or bores can also be provided.
- the injection motor 51 is overlapped or overrun by the injection bridge 25.
- the injection bridge 25 has the shape of an upside-down U. This results in an arrangement of the injection motor 51 essentially within the support block 10 when projected in the direction of the spray axis ss, while the injection motor 51 on both sides of the Supports 25a of the injection bridge 25 is overlapped. Since the gear 41 is mainly arranged in the area between the carrier block 10 and the molding 10a, the overall length of the carrier block is hardly increased. As a result, the injection bridge 25 can move up to the carrier block 10, despite the arrangement of the transmission. Injection motor 51 and carrier block 10 can thus be moved together. Nevertheless, the injection engine can no longer only extend between the carrier block and the injection bridge, but can also be arranged outside of these two elements.
- the rotary motor 52 for rotating the conveying means 72 designed as a screw conveyor is arranged above the injection motor. If this rotary motor 52 is arranged transversely to the spray axis ss, preferably protruding upwards, the injection molding unit is shortened further, taking up space which is in principle freely available. At the same time, the center of gravity of the injection molding unit is shifted further towards the center. Via a transmission 26, preferably a bevel gear, a favorable coupling to the conveyor 72 can be achieved.
- the spindles 31 are mounted on the stationary mold carrier 35 in spars and plunge into them.
- the spindles 31 end in the direction of the stationary mold carrier 35 with a stop 32 which can slide on the inside of the spars.
- the spars themselves are designed as interchangeable intermediate pieces 13, which can be fixed on a flange 13a on the stationary mold carrier 35 by means of fastening means 13c and on a holding plate 27 via a flange 13b.
- the intermediate pieces 13 can also serve as a guide 13e for the receiving body 17. These intermediate pieces are usually delivered in the shortest embodiment when delivered to the customer, which leads to a very compact injection molding unit.
- these intermediate pieces 13 can be easily replaced by longer ones. It is also possible to store these intermediate pieces on a sleeve carrier in the area of the stationary mold carrier 35, which can be moved laterally or upwards on the stationary mold carrier 35, in order to thereby make the injection molding unit accessible to a linear sprue, as described, for example, in DE-C 42 27 336.6 is known.
- the spindles 31 themselves are mounted on the carrier block 10 in a rotationally fixed manner via a holding flange 24.
- the associated nut 22, however, is rotatably supported in a gear block 20.
- the gear block 20 On the gear block 20, on the one hand, the flange 13b is fastened with fastening means 28 and, on the other hand, a holding plate 27 with fastening means 29.
- the holding plate 27 is fixed to the bar 62. This results in an almost stationary arrangement of the holding plate, gear block 20 and nut 22 as long as the bar 62 is not itself moved. Therefore, the masses to be moved during the axial movement of the carrier block 10 are also reduced.
- the movement of the further spindle drive which is dimensioned for lower forces for applying the nozzle, takes place via a drive unit 50, which in the first embodiment comes to rest under the receiving body 17.
- the drive unit 50 drives a hollow shaft motor 16 which drives the two gears 14 and ultimately the nuts 22 of the further spindle drives A via a shaft 15.
- the linear potentiometer 70 There is a possibility of regulation by means of the linear potentiometer 70 in such a way that one side is regulated with regard to its movement, while the other side runs passively.
- the spindles 31 can also be adjusted via an adjusting nut 30 and thus the position of the carrier block 10 with respect to the stationary mold carrier 35.
- the compact structure and the minimization of masses can also be increased by replacing the drive unit 50 and the gear block by a hollow shaft motor 73 with a planetary gear 73a.
- regulation can take place in that only one of the hollow shaft motors 73 is regulated, while the other runs passively synchronously.
- FIGS. 6-8 The relevant embodiment is shown in FIGS. 6-8.
- the spindle 31 can be seen in FIG. 7, in which case the guide 32 has not been guided on the inner walls of the intermediate pieces 13. 8, the sun gear 74 is at the same time the rotor which drives the planet gear 75 via a pinion region 74a.
- the planet gear 75 in turn is in connection with the ring gear 76 and drives the spindle nut 78 mounted in a ball bearing 77.
- the Integrated planetary gear 73a enables the use of larger spindles, which is to be equated with a longer service life of the drive. At the same time, a larger pitch can be achieved on the spindles, so that there is an optimization in that the torque is set relatively high and at the same time the spindle speed is reduced. This also contributes to increasing the service life.
- any gear or drive means such as Belt transmissions, parallel shaft transmissions, bevel gear transmissions can be used, as can trapezoidal spindle drives, ball screw drives or toothed racks instead of the spindle drives.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96932442A EP0846048A1 (de) | 1995-08-25 | 1996-08-13 | Spritzgiesseinheit für eine kunststoff-spritzgiessmaschine |
US09/029,131 US6155817A (en) | 1995-08-25 | 1996-08-13 | Injection-moulding unit for a machine for the injection moulding of plastics |
JP9509686A JPH11511082A (ja) | 1995-08-25 | 1996-08-13 | 合成樹脂射出成形機の射出成形ユニット |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1995131326 DE19531326C1 (de) | 1995-08-25 | 1995-08-25 | Spritzgießeinheit für eine Kunststoff-Spritzgießmaschine |
DE19531326.7 | 1995-08-25 | ||
DE19542453A DE19542453C2 (de) | 1995-11-14 | 1995-11-14 | Vorrichtung zur Umwandlung einer Drehbewegung in eine Axialbewegung |
DE19542453.0 | 1995-11-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997007957A1 true WO1997007957A1 (de) | 1997-03-06 |
Family
ID=26017998
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1996/001531 WO1997007957A1 (de) | 1995-08-25 | 1996-08-13 | Spritzgiesseinheit für eine kunststoff-spritzgiessmaschine |
Country Status (5)
Country | Link |
---|---|
US (1) | US6155817A (de) |
EP (1) | EP0846048A1 (de) |
JP (1) | JPH11511082A (de) |
CA (1) | CA2228839A1 (de) |
WO (1) | WO1997007957A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10104311C1 (de) * | 2001-01-22 | 2002-08-14 | Berstorff Gmbh | Compoundieranlage |
JP4645364B2 (ja) | 2005-08-25 | 2011-03-09 | トヨタ自動車株式会社 | 回転直動変換機構 |
DE102011082540A1 (de) | 2011-09-12 | 2013-03-14 | Stabilus Gmbh | Antriebseinrichtung |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB965214A (en) * | 1960-01-18 | 1964-07-29 | Projectile And Engineering Com | Improvements in or relating to injection moulding machines |
DE2039458A1 (de) * | 1970-08-08 | 1972-02-17 | Fahr Bucher Gmbh | Kunststoff verarbeitende Maschine |
CH577376A5 (en) * | 1974-11-26 | 1976-07-15 | Netstal Ag Maschf Giesserei | Plastics injection moulding machine - having hydraulically operated plasticising injection screw driving shaft, pistons-cylinders and guide beams |
EP0427866A1 (de) * | 1989-05-24 | 1991-05-22 | Fanuc Ltd. | Spritzgiessvorrichtung vom typ mit zwei platten |
JPH03164219A (ja) * | 1989-11-24 | 1991-07-16 | Japan Steel Works Ltd:The | 射出成形機の射出装置移動制御方法及び装置 |
EP0576925A1 (de) * | 1992-06-23 | 1994-01-05 | Battenfeld Kunststoffmaschinen Ges.m.b.H. | Spritzaggregat für Spritzgiessmaschinen |
EP0581401A1 (de) * | 1992-07-17 | 1994-02-02 | MANNESMANN Aktiengesellschaft | Spritzgiessmaschine |
DE4227336C1 (de) * | 1992-08-18 | 1994-03-31 | Karl Hehl | Kunststoff-Spritzgießmaschine |
EP0627289A1 (de) * | 1993-05-29 | 1994-12-07 | Karl Hehl | Spritzgiesseinheit für eine Kunststoff-Spritzgiessmaschine |
DE4344335A1 (de) * | 1993-12-23 | 1995-06-29 | Krauss Maffei Ag | Einspritzaggregat für eine Spritzgießmaschine |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE50843C (de) * | O. ElSELE jn Karlsruhe, Baden, Schützenstr. 82. Vom 6. J(jli 1889 ab | Thürschlofs | ||
US2966070A (en) * | 1955-12-02 | 1960-12-27 | Anderson Co | Motion conversion unit |
DE1043743B (de) * | 1956-03-06 | 1958-11-13 | Carl Bruno Strandgren | Differentialrollenschraubentrieb |
CH410542A (de) * | 1962-07-14 | 1966-03-31 | Bruno Strandgren Carl | Rollschraube |
JPS61125823A (ja) * | 1984-11-24 | 1986-06-13 | Fanuc Ltd | 射出成形機における射出・計量機構 |
US4802558A (en) * | 1987-10-01 | 1989-02-07 | The Olofsson Corporation | Apparatus providing environmental and mechanical protection for ball screw drives |
FR2647194B1 (fr) * | 1989-05-22 | 1992-12-04 | Guerin Sa Pierre | Surgelateur a plaques |
DE4115758C2 (de) * | 1991-05-15 | 1999-06-24 | Schaeffler Waelzlager Ohg | Wälzschraubtrieb |
US5370012A (en) * | 1993-03-08 | 1994-12-06 | Stanley; Richard B. | Linear actuation roller bearing nut |
DE4324838A1 (de) * | 1993-07-23 | 1995-01-26 | Schaeffler Waelzlager Kg | Wälzringgewindetrieb |
US5421712A (en) * | 1993-10-05 | 1995-06-06 | Industrial Technology Research Institute | Screw rotating and advancing device for an injection molding machine |
DE4411651C1 (de) * | 1994-04-02 | 1995-04-27 | Karl Hehl | Vorrichtung zur drehsicheren Festlegung eines Kugelrollspindelmechanismus |
DE19580020C1 (de) * | 1994-05-10 | 1996-08-01 | Procontrol Ag | Verfahren und Vorrichtung zur Steuerung der Düsenanlegung für elektrische Spritzgießmaschinen |
-
1996
- 1996-08-13 EP EP96932442A patent/EP0846048A1/de not_active Ceased
- 1996-08-13 WO PCT/DE1996/001531 patent/WO1997007957A1/de not_active Application Discontinuation
- 1996-08-13 JP JP9509686A patent/JPH11511082A/ja active Pending
- 1996-08-13 CA CA002228839A patent/CA2228839A1/en not_active Abandoned
- 1996-08-13 US US09/029,131 patent/US6155817A/en not_active Expired - Fee Related
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB965214A (en) * | 1960-01-18 | 1964-07-29 | Projectile And Engineering Com | Improvements in or relating to injection moulding machines |
DE2039458A1 (de) * | 1970-08-08 | 1972-02-17 | Fahr Bucher Gmbh | Kunststoff verarbeitende Maschine |
CH577376A5 (en) * | 1974-11-26 | 1976-07-15 | Netstal Ag Maschf Giesserei | Plastics injection moulding machine - having hydraulically operated plasticising injection screw driving shaft, pistons-cylinders and guide beams |
EP0427866A1 (de) * | 1989-05-24 | 1991-05-22 | Fanuc Ltd. | Spritzgiessvorrichtung vom typ mit zwei platten |
JPH03164219A (ja) * | 1989-11-24 | 1991-07-16 | Japan Steel Works Ltd:The | 射出成形機の射出装置移動制御方法及び装置 |
EP0576925A1 (de) * | 1992-06-23 | 1994-01-05 | Battenfeld Kunststoffmaschinen Ges.m.b.H. | Spritzaggregat für Spritzgiessmaschinen |
EP0581401A1 (de) * | 1992-07-17 | 1994-02-02 | MANNESMANN Aktiengesellschaft | Spritzgiessmaschine |
DE4227336C1 (de) * | 1992-08-18 | 1994-03-31 | Karl Hehl | Kunststoff-Spritzgießmaschine |
EP0627289A1 (de) * | 1993-05-29 | 1994-12-07 | Karl Hehl | Spritzgiesseinheit für eine Kunststoff-Spritzgiessmaschine |
DE4344335A1 (de) * | 1993-12-23 | 1995-06-29 | Krauss Maffei Ag | Einspritzaggregat für eine Spritzgießmaschine |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 015, no. 400 (M - 1167) 11 October 1991 (1991-10-11) * |
Also Published As
Publication number | Publication date |
---|---|
JPH11511082A (ja) | 1999-09-28 |
EP0846048A1 (de) | 1998-06-10 |
CA2228839A1 (en) | 1997-03-06 |
US6155817A (en) | 2000-12-05 |
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