CA2262707A1 - Closing unit for a plastic injection moulding machine - Google Patents
Closing unit for a plastic injection moulding machine Download PDFInfo
- Publication number
- CA2262707A1 CA2262707A1 CA002262707A CA2262707A CA2262707A1 CA 2262707 A1 CA2262707 A1 CA 2262707A1 CA 002262707 A CA002262707 A CA 002262707A CA 2262707 A CA2262707 A CA 2262707A CA 2262707 A1 CA2262707 A1 CA 2262707A1
- Authority
- CA
- Canada
- Prior art keywords
- closing
- piston
- locking sleeve
- claw
- locking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/64—Mould opening, closing or clamping devices
- B29C45/67—Mould opening, closing or clamping devices hydraulic
- B29C45/6707—Mould opening, closing or clamping devices hydraulic without relative movement between the piston and the cylinder of the clamping device during the mould opening or closing movement
- B29C45/6714—Mould opening, closing or clamping devices hydraulic without relative movement between the piston and the cylinder of the clamping device during the mould opening or closing movement using a separate element transmitting the mould clamping force from the clamping cylinder to the mould
- B29C45/6728—Mould opening, closing or clamping devices hydraulic without relative movement between the piston and the cylinder of the clamping device during the mould opening or closing movement using a separate element transmitting the mould clamping force from the clamping cylinder to the mould the separate element consisting of coupling rods
-
- 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
- B29C45/64—Mould opening, closing or clamping devices
- B29C45/67—Mould opening, closing or clamping devices hydraulic
- B29C45/6707—Mould opening, closing or clamping devices hydraulic without relative movement between the piston and the cylinder of the clamping device during the mould opening or closing movement
- B29C45/6714—Mould opening, closing or clamping devices hydraulic without relative movement between the piston and the cylinder of the clamping device during the mould opening or closing movement using a separate element transmitting the mould clamping force from the clamping cylinder to the mould
- B29C45/6728—Mould opening, closing or clamping devices hydraulic without relative movement between the piston and the cylinder of the clamping device during the mould opening or closing movement using a separate element transmitting the mould clamping force from the clamping cylinder to the mould the separate element consisting of coupling rods
- B29C2045/6735—Rotatable means coaxial with the coupling rod for locking the coupling rod to the mould platen
Abstract
Known injection moulding machines have complicated closing units with two claw pairs each of which are complicated to produce. The invention therefore relates to a closing unit in which the first power transmission surface (20) is formed between a claw of the closing column (7) and a free space (18) of the locking sleeve (14), in accordance with a known method, and the second force transmission surface (15) is formed between an outer diameter grading of the locking sleeve (14) and an inner diameter grading of the closing piston (12).
Description
D~s; I "Jtion Clos;~l~ lJnit for a Pl~lstic lnjection Molding ~
The invention relates to a closing unit according to the ~ .~nble of claim 1.
Injection molding m~rhi~ ~s of this type are used for plastics proc~ssin~
Plastic injection molding mach~nes o~several types are known in the art.
These m~hin~s typically include a C-shaped m~chine frame, with a hydraulic closing unit c~rlying a fixed tool clamping plate secured to one leg for of the ms~chine frame and ~ positioning unit with a movable tool clamping plate suppotted by the other leg.
The positionin~ unit prefera~ly includes four cantilevered columns which are evenly spaced on a reference circle and oriented in the direction of travel. The free ends of the coluIrms are formed as claws.
The hydraulic closing unit further includes four locking sleeves fonning counter pieces of the claws and shaped to match tlle claws, with the ~ree ends of the locking sleeves wnnected to piston rods.
During the injection molding process, this fourfold mechanical closing assembly which includes the columns and the hydraulic closing pistons, transmits the applied closing force uniformly to both tool halves.
A closing unit employing this locking method is described in DD 274 ~90 Al by the Applicant. Each of the four hydraulic loclcin{~ assemblies consists of a piston-cylinder unit with a movable piston rod. The free end of the piston rod faces ~e corresponding colurnn of the positioning unit and is - like the claw of the column - formed as a star-shaped claw. ~ach of thc claws has an outer shoulder for transmitting the closing force.
The rotatable claw sleeve forms thc mcchar~cal linkage between the two claws; the rotatable claw sleeve is supported in the fixed leg of the machine frame and has two ir ner shoulders for transmitting the closing force.
~ 1 In the closing position, the t~,vo opposite claws are locatcd in the claw sleeve which is held in a pred~tc,...;-.ed radial position. By rotating the claw sleevc from the outside, the ~ho~ld~rs of the claws and the claw sleeve begin to overlap and providc a col~ncclion bet~veen the piston-c~linder unit and the column capable of car~ying an axial load~
I his locking assembly meets atl functional req~u;l~"le.,~.
The lockin~ assembly, ho~ever, is very ex~xllsive to m~nnf~ct~e, since eaeh locking assembly requires two cl~w pairs wilh intlicate contours.
The complexity of the manufacturing process further increases the manufacturing costs.
It is therefore an object to provide a closing unit of the type described above where each connection has only one pair of claws.
The object is solved by the characterizing f~lu~,s of claim I .
Advantageous embodim~nts are described in the dependent claims Z to 4.
Ille invention elim;n~tt~s the disadvantages associated with conventional devices.
Most advantageously, the closing unit results can be n~nllf~ctured much more cost-effectively. Instead of manufacturing a complete pair with expensive contours, relativcly nsive rotationally syrn~etr~c components are used instead.
Advan~geously, the first force tr~ sion surface is also mo~ed out of the re~ion of the fixed tool clamping plate and into the free re~ion at the sarne level as the adjacent form tool half. Consequently, a considerable arnount of free space is gained in the open position of the closing unit to set up tooling.
The buffer is designed to prevent the eolwnn from striking the piston rod, thereby preventing damage to lhe COmpOnentS and also reducing noise.
The invention is described hereinafter with respect to an embodime~.
Tt is shown in FIG. 1 a sçh~ tic cross-section through a closing unit acco~ .g to the invention and FIG. 2 ~ partial cross-section of the claw co....e~ion accordil1g to the invention.
Since the structure of a plastic injection molding m~chine is known in tlle art~ of the C-shaped m~rhin~, frame and the two legs only the machine bed I is shown.
A fixed tool clarnping plate 2 is secured to one of the legs, whereas a positioning unit 3 with a movable tool clamping plate 4 is su~o.ted on the other leg.
The positioning unit 3 is guided over its cntire path in the machine bed 1. The positioning unit 3 is driven by a hydraulic drive (not shown).
A form tool half 5 i5; n~.hçd to thc inner surface of the fixed tool clampin~ pJate 2, with the other form tool half 6 ~t'.hed to the inside of the movable tool clamping plate 4.
The positior~ing unit 3 includes closing columns 7, ~hich are supported in the movable tool cl~mping plate 4. On the side Facing away from the fo~n tool, the closing colurnns 7 are also connected through a yoke X, with the free ends of the closing columns 7projecl:ing over the movable forrn tool half 6. The free ends are formed as a star-shaped claw 9 with a shoulder.
I;our hydraulic locking ~semblies 10 which incl-lde a stationary cylinder 11 and a movable closing piston 12 with a piston rod 13, are arranged ul the fixed tool clamping plate 2, in a similar arrangement as the closing columrls 7. The free end of the piston r~d 13 faces the corresponding closing column 7.
The closing piston 12 is in the form of a sleeve, with a stepped through-bore extending through the center. The stepped bore supp~rts a locking sleeve l 4 which can be driven and rotated and which has a through -bore for receiving the piston rod 13. A step is provided on the outside diarneter of the locking sleeve 14. ~be Ytepped bore of the closing piston 12 and the step on the outside diameter of the lc~cking sleeve 14 fo~n an axial force t~An~mi~sion surface IS. The closing piston 12, the rotatable locking sleeve 14 and thc piston rod 13 close flush on the sidc facing away from the form tool and arc supported by a piston coYer 16. The closing piston 12, the piston co~er 16 and the piston rod 13 are rigidly co....ec~ed with each other through linlcage ~ n1c and are also conn~cte~ with the fixed tool clamping plate 2 through a safety ele~nent 17 and secured against rotation while allowing axial ~ r~m~n~
The lockin~ sleeve 14 proje~ hwisG over the piston rod 13 on the side facing away from the cover.
The projecting region of the locking slceve 14 forms an interiOr free space 18 which merges with the through bote on the side of the cover and ~ith a claw opening 19 having a contour m~tc~hing the fo~n of the claw 9 on the side of the column.
The step into the diatneter between the free space 18 and the claw opening 19 produces a sho~llder which in conjunction with the shouldcr ~i~posed on the claw 9 forms a second axial force tr~n~mi~sion surface 20.
The force tr~ncmicsion surface 20 located on the cla~ 9 is orientcd opposite to the force tr~n~ission surface 15 located on the closing piston 12.
1 he free font face of the piston rod 13 is provided with an elastic buffer 21.
The two form tool halves 5 and 6 are closed by initially moving the hydraulically operated positioning unit 3 at high speed towards the fixed tool clamping plate 2 and subsequently switching to a lower positioning speed when the claws 9 reach the region of the locking assemblies 10. The claws 9 pass through the co~esponding radial clawopenings 19 of the locking sleeve 14 at the lower speed. The positioning unit 3 then stops its advance, while the elastic buffer 21 cushions a possible imp~ct of the claws 9 on the stationary piston rod 13.
The locking sleeve 14 is subsequently rotated by a predetermined angle with the help of a radi~l drive (not shown), so ~hat the star-shaped contours of the claws 9 and the claw openin~s no longer overlap. Beca~se the locking sleeve 14 is not under load, it is able to rotate and to slide ~eely in and out.
Also r~ot shown is a hydraulic drive which biases the closing piston 12 of the locking , asscmbly lO on the side of the piston rod and moves the closing piston 12 in a d~rection away from the positioning unit 3. The piston cover 16 and the piston rod 13 w~ich are rigidly coupled, move in a similar fashion, as does the piston rod 13 since the piston rod 13 is under axial load through the second force ~r~ncmi~sion surface 15. At the same time, the shoulders ~f the claws 9 and the claw openings 19 make conlaCt and forrn the se~ond force ~n~ sion surface 20.
In this way, a force is transmitted from the hydraulic drive of the locking assembly lO
through the closing piston 12, the locking sleeve 13, the closing cOlllmrl9 7, to the movable tool clarnping plate 4 of the positioning unit 3. This forcc presses the two forrn tool halves S and ~ against each other and holds them together during the injection molding operation.
The closing unit is opened by applying a pressure on the piston side of the closing piston 12 and thereby lifting the shouldcrs of the claws 9 and the shoulders of the claw opening 19 a~e offeach other. This relieves the locking sleeve 14 which can then be switched.
W~en the locking sleeve 14 is rotated, ~e contours of the claws 9 and the claw opening 19 overlap again and the positioning unit 3 which is now driven, separates the two form tool halves.
List of reft~ ce nurnerals I m~ in~
The invention relates to a closing unit according to the ~ .~nble of claim 1.
Injection molding m~rhi~ ~s of this type are used for plastics proc~ssin~
Plastic injection molding mach~nes o~several types are known in the art.
These m~hin~s typically include a C-shaped m~chine frame, with a hydraulic closing unit c~rlying a fixed tool clamping plate secured to one leg for of the ms~chine frame and ~ positioning unit with a movable tool clamping plate suppotted by the other leg.
The positionin~ unit prefera~ly includes four cantilevered columns which are evenly spaced on a reference circle and oriented in the direction of travel. The free ends of the coluIrms are formed as claws.
The hydraulic closing unit further includes four locking sleeves fonning counter pieces of the claws and shaped to match tlle claws, with the ~ree ends of the locking sleeves wnnected to piston rods.
During the injection molding process, this fourfold mechanical closing assembly which includes the columns and the hydraulic closing pistons, transmits the applied closing force uniformly to both tool halves.
A closing unit employing this locking method is described in DD 274 ~90 Al by the Applicant. Each of the four hydraulic loclcin{~ assemblies consists of a piston-cylinder unit with a movable piston rod. The free end of the piston rod faces ~e corresponding colurnn of the positioning unit and is - like the claw of the column - formed as a star-shaped claw. ~ach of thc claws has an outer shoulder for transmitting the closing force.
The rotatable claw sleeve forms thc mcchar~cal linkage between the two claws; the rotatable claw sleeve is supported in the fixed leg of the machine frame and has two ir ner shoulders for transmitting the closing force.
~ 1 In the closing position, the t~,vo opposite claws are locatcd in the claw sleeve which is held in a pred~tc,...;-.ed radial position. By rotating the claw sleevc from the outside, the ~ho~ld~rs of the claws and the claw sleeve begin to overlap and providc a col~ncclion bet~veen the piston-c~linder unit and the column capable of car~ying an axial load~
I his locking assembly meets atl functional req~u;l~"le.,~.
The lockin~ assembly, ho~ever, is very ex~xllsive to m~nnf~ct~e, since eaeh locking assembly requires two cl~w pairs wilh intlicate contours.
The complexity of the manufacturing process further increases the manufacturing costs.
It is therefore an object to provide a closing unit of the type described above where each connection has only one pair of claws.
The object is solved by the characterizing f~lu~,s of claim I .
Advantageous embodim~nts are described in the dependent claims Z to 4.
Ille invention elim;n~tt~s the disadvantages associated with conventional devices.
Most advantageously, the closing unit results can be n~nllf~ctured much more cost-effectively. Instead of manufacturing a complete pair with expensive contours, relativcly nsive rotationally syrn~etr~c components are used instead.
Advan~geously, the first force tr~ sion surface is also mo~ed out of the re~ion of the fixed tool clamping plate and into the free re~ion at the sarne level as the adjacent form tool half. Consequently, a considerable arnount of free space is gained in the open position of the closing unit to set up tooling.
The buffer is designed to prevent the eolwnn from striking the piston rod, thereby preventing damage to lhe COmpOnentS and also reducing noise.
The invention is described hereinafter with respect to an embodime~.
Tt is shown in FIG. 1 a sçh~ tic cross-section through a closing unit acco~ .g to the invention and FIG. 2 ~ partial cross-section of the claw co....e~ion accordil1g to the invention.
Since the structure of a plastic injection molding m~chine is known in tlle art~ of the C-shaped m~rhin~, frame and the two legs only the machine bed I is shown.
A fixed tool clarnping plate 2 is secured to one of the legs, whereas a positioning unit 3 with a movable tool clamping plate 4 is su~o.ted on the other leg.
The positioning unit 3 is guided over its cntire path in the machine bed 1. The positioning unit 3 is driven by a hydraulic drive (not shown).
A form tool half 5 i5; n~.hçd to thc inner surface of the fixed tool clampin~ pJate 2, with the other form tool half 6 ~t'.hed to the inside of the movable tool clamping plate 4.
The positior~ing unit 3 includes closing columns 7, ~hich are supported in the movable tool cl~mping plate 4. On the side Facing away from the fo~n tool, the closing colurnns 7 are also connected through a yoke X, with the free ends of the closing columns 7projecl:ing over the movable forrn tool half 6. The free ends are formed as a star-shaped claw 9 with a shoulder.
I;our hydraulic locking ~semblies 10 which incl-lde a stationary cylinder 11 and a movable closing piston 12 with a piston rod 13, are arranged ul the fixed tool clamping plate 2, in a similar arrangement as the closing columrls 7. The free end of the piston r~d 13 faces the corresponding closing column 7.
The closing piston 12 is in the form of a sleeve, with a stepped through-bore extending through the center. The stepped bore supp~rts a locking sleeve l 4 which can be driven and rotated and which has a through -bore for receiving the piston rod 13. A step is provided on the outside diarneter of the locking sleeve 14. ~be Ytepped bore of the closing piston 12 and the step on the outside diameter of the lc~cking sleeve 14 fo~n an axial force t~An~mi~sion surface IS. The closing piston 12, the rotatable locking sleeve 14 and thc piston rod 13 close flush on the sidc facing away from the form tool and arc supported by a piston coYer 16. The closing piston 12, the piston co~er 16 and the piston rod 13 are rigidly co....ec~ed with each other through linlcage ~ n1c and are also conn~cte~ with the fixed tool clamping plate 2 through a safety ele~nent 17 and secured against rotation while allowing axial ~ r~m~n~
The lockin~ sleeve 14 proje~ hwisG over the piston rod 13 on the side facing away from the cover.
The projecting region of the locking slceve 14 forms an interiOr free space 18 which merges with the through bote on the side of the cover and ~ith a claw opening 19 having a contour m~tc~hing the fo~n of the claw 9 on the side of the column.
The step into the diatneter between the free space 18 and the claw opening 19 produces a sho~llder which in conjunction with the shouldcr ~i~posed on the claw 9 forms a second axial force tr~n~mi~sion surface 20.
The force tr~ncmicsion surface 20 located on the cla~ 9 is orientcd opposite to the force tr~n~ission surface 15 located on the closing piston 12.
1 he free font face of the piston rod 13 is provided with an elastic buffer 21.
The two form tool halves 5 and 6 are closed by initially moving the hydraulically operated positioning unit 3 at high speed towards the fixed tool clamping plate 2 and subsequently switching to a lower positioning speed when the claws 9 reach the region of the locking assemblies 10. The claws 9 pass through the co~esponding radial clawopenings 19 of the locking sleeve 14 at the lower speed. The positioning unit 3 then stops its advance, while the elastic buffer 21 cushions a possible imp~ct of the claws 9 on the stationary piston rod 13.
The locking sleeve 14 is subsequently rotated by a predetermined angle with the help of a radi~l drive (not shown), so ~hat the star-shaped contours of the claws 9 and the claw openin~s no longer overlap. Beca~se the locking sleeve 14 is not under load, it is able to rotate and to slide ~eely in and out.
Also r~ot shown is a hydraulic drive which biases the closing piston 12 of the locking , asscmbly lO on the side of the piston rod and moves the closing piston 12 in a d~rection away from the positioning unit 3. The piston cover 16 and the piston rod 13 w~ich are rigidly coupled, move in a similar fashion, as does the piston rod 13 since the piston rod 13 is under axial load through the second force ~r~ncmi~sion surface 15. At the same time, the shoulders ~f the claws 9 and the claw openings 19 make conlaCt and forrn the se~ond force ~n~ sion surface 20.
In this way, a force is transmitted from the hydraulic drive of the locking assembly lO
through the closing piston 12, the locking sleeve 13, the closing cOlllmrl9 7, to the movable tool clarnping plate 4 of the positioning unit 3. This forcc presses the two forrn tool halves S and ~ against each other and holds them together during the injection molding operation.
The closing unit is opened by applying a pressure on the piston side of the closing piston 12 and thereby lifting the shouldcrs of the claws 9 and the shoulders of the claw opening 19 a~e offeach other. This relieves the locking sleeve 14 which can then be switched.
W~en the locking sleeve 14 is rotated, ~e contours of the claws 9 and the claw opening 19 overlap again and the positioning unit 3 which is now driven, separates the two form tool halves.
List of reft~ ce nurnerals I m~ in~
2 fixed tool clamping plate 3 positioning ur~it 4 movable tool clamping plate S form tool half 6 fonTI tool half 7 closing column 8 yoke 9 claw 10 locking unit I I cylinder 1~ closing piston 13 piston rod 14 lockin~ sleeve 15 second force ~n~mi~sion surface 16 piston cover 17 safety element 18 ~ree space 19 claw open~g 20 first force tr~ncmicsion surface 21 elastic buffer
Claims (4)
1 . Closing unit for a plastic injection molding machine comprising :
- a positioning unit (3) with a movable tool clamping plate (4) and a plurality of cantilevered closing columns (7), wherein the free ends of the closing columns (7) are formed as claws (9), and - a locking unit (10) with a hydraulic closing piston (12) and rotatable locking sleeves which connect each closing column (7) and the associated closing piston (12) with one another, wherein each locking sleeve has a claw opening (19) which matches the claw (9) of the corresponding closing column (7), and - a first power transmitting surface (20) formed between the locking sleeve and the closing column (7) and a second power transmitting surface formed between the locking sleeve and the closing piston (12), characterized in that the first power transmitting surface (20) is located in a conventional manner in a free space (18) of the locking sleeve (14) and that the second power transmitting surface (15) is formed on the circumference of the locking sleeve (14) by providing a step in the outer diameter of the locking sleeve (14) acting as a (first) shoulder in the closing direction, wherein the (first) shoulder is surrounded by a (second) shoulder formed by a stepped bore of the closing piston (12) and acting in the same direction.
- a positioning unit (3) with a movable tool clamping plate (4) and a plurality of cantilevered closing columns (7), wherein the free ends of the closing columns (7) are formed as claws (9), and - a locking unit (10) with a hydraulic closing piston (12) and rotatable locking sleeves which connect each closing column (7) and the associated closing piston (12) with one another, wherein each locking sleeve has a claw opening (19) which matches the claw (9) of the corresponding closing column (7), and - a first power transmitting surface (20) formed between the locking sleeve and the closing column (7) and a second power transmitting surface formed between the locking sleeve and the closing piston (12), characterized in that the first power transmitting surface (20) is located in a conventional manner in a free space (18) of the locking sleeve (14) and that the second power transmitting surface (15) is formed on the circumference of the locking sleeve (14) by providing a step in the outer diameter of the locking sleeve (14) acting as a (first) shoulder in the closing direction, wherein the (first) shoulder is surrounded by a (second) shoulder formed by a stepped bore of the closing piston (12) and acting in the same direction.
2. Closing unit according to claim 1, characterized in that the closing piston (12) is rigidly connected to a piston rod (13) through a piston cover (16) disposed of the font face of the closing piston (12) and that the locking sleeve (14) is arranged in the radial direction between the closing piston (12) and the piston rod (13) and extends axially to the piston cover (16).
3. Closing unit according to claim 2, characterized in that the first power transmitting surface (20) is displaced to the height of the form tool half (6) by to an axial elongation of the locking sleeve (14) and a corresponding decrease in the length of the closing columns (7).
4. Closing unit according to claims 3, characterized in that an elastic buffer (21) which works against the claw (9), is attached to the free end of the piston rod (13).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1997119870 DE19719870A1 (en) | 1997-05-12 | 1997-05-12 | Closing unit for a plastic injection molding machine |
| DE19719870.8 | 1997-05-12 | ||
| PCT/DE1998/001263 WO1998051468A1 (en) | 1997-05-12 | 1998-05-07 | Closing unit for a plastic injection moulding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2262707A1 true CA2262707A1 (en) | 1998-11-19 |
Family
ID=7829244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002262707A Abandoned CA2262707A1 (en) | 1997-05-12 | 1998-05-07 | Closing unit for a plastic injection moulding machine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0942822A1 (en) |
| CA (1) | CA2262707A1 (en) |
| DE (1) | DE19719870A1 (en) |
| WO (1) | WO1998051468A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITMI20011538A1 (en) | 2001-07-19 | 2003-01-19 | Sandretto Ind | METHOD AND PRESS FOR CLOSING MOLDS IN INJECTION MOLDING MACHINES |
| DE20114535U1 (en) * | 2001-09-03 | 2002-01-24 | Battenfeld Gmbh | Lock for one column |
| ITMI20020820A1 (en) * | 2002-04-18 | 2003-10-20 | Sandretto Ind | CLOSING HYDRAULIC DEVICE FOR INJECTION MOLDING PRESSES |
| KR100836964B1 (en) * | 2003-05-01 | 2008-06-10 | 도시바 기카이 가부시키가이샤 | Mold clamping device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1155885B (en) * | 1958-06-05 | 1963-10-17 | Ia Ind V H Van Lohuizen & Co N | Die casting machine |
| DE2812301A1 (en) * | 1977-05-10 | 1978-11-23 | Plast Elastverarbeitungsmasch | TOOL LOCKING AND LOCKING UNIT, IN PARTICULAR FOR INJECTION MOLDING MACHINES |
| DD146406A1 (en) * | 1979-11-29 | 1981-02-11 | Lothar Elsner | METHOD AND HYDRAULIC CIRCUIT ARRANGEMENT FOR INJECTION MOLDING |
| DD274590B3 (en) * | 1988-08-08 | 1993-01-21 | Hemscheidt Maschtech Schwerin | TWIN-PLATE CLOSURE UNIT FOR INJECTION MOLDING MACHINES FOR PLASTIC PROCESSING |
-
1997
- 1997-05-12 DE DE1997119870 patent/DE19719870A1/en not_active Withdrawn
-
1998
- 1998-05-07 EP EP98933464A patent/EP0942822A1/en not_active Withdrawn
- 1998-05-07 WO PCT/DE1998/001263 patent/WO1998051468A1/en not_active Application Discontinuation
- 1998-05-07 CA CA002262707A patent/CA2262707A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| DE19719870A1 (en) | 1998-11-19 |
| WO1998051468A1 (en) | 1998-11-19 |
| EP0942822A1 (en) | 1999-09-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |