WO1994014594A1 - Appareil de verrouillage du moule dans une machine electrique de moulage par injection - Google Patents
Appareil de verrouillage du moule dans une machine electrique de moulage par injection Download PDFInfo
- Publication number
- WO1994014594A1 WO1994014594A1 PCT/JP1992/001666 JP9201666W WO9414594A1 WO 1994014594 A1 WO1994014594 A1 WO 1994014594A1 JP 9201666 W JP9201666 W JP 9201666W WO 9414594 A1 WO9414594 A1 WO 9414594A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- platen
- mold clamping
- injection molding
- electric injection
- motor support
- 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.)
- Ceased
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
- B29C45/66—Mould opening, closing or clamping devices mechanical
Definitions
- the present invention relates to a mold clamping device for an electric injection molding machine.
- resin heated and fluidized in a heating cylinder is injected at a high pressure to fill a mold cavity, where it is cooled, solidified or hardened, and then the mold is opened.
- a mold clamping device is provided so that the resin filled in the cavity does not leak from the mating surface of the mold.
- the mold is opened and closed by a crank mechanism or a ball screw feed mechanism, and the mold is clamped by a mold clamping cylinder.
- FIG. 1 is a schematic view of a mold clamping device of a conventional electric injection molding machine.
- 1 is a fixed platen
- 2 is a movable platen
- the molds 3a and 3b are respectively attached thereto.
- Reference numeral 4 denotes a toggle support movable on a base 5, and the movable platen 2 is moved by a single toggle mechanism 6 provided between the toggle support 4 and the movable platen 2 to open and close the mold.
- each tie bar 7 has a hole 1 a, formed in the fixed platen 1 and the movable platen 2.
- each tie bar 7 The other end is fixed to the toggle support 4, and the other end is fixed to a piston 9 of a mold clamping cylinder 8 attached to the fixed platen 1.
- the single toggle mechanism 6 includes a bracket 12 fixed to the toggle support 4, a first link 13 rotatably supported by the bracket 12, and a link bin 18 for the first link 13.
- a second link 14 pivotally connected via the first link 14, a bracket 15 rotatably supporting the second link 14, and a bracket 15 fixed to a movable platen 2, and the axis of the first link 13.
- 16 is connected to the drive shaft of a motor equipped with a speed reducer (for example, a servomotor with one gear connected to one gear).
- the first link 13 and the second link 14 are set to a length in which the dies 3a and 3b are in contact with each other when the dies are extended in a straight line. It is performed.
- Reference numeral 17 denotes a stop which is fixed to the toggle sabot 4.When the first link 13 rotates in the direction of the arrow a and comes into contact with the stop 17, further rotation is restricted, and The single toggle mechanism 6 is held at the dead center position. The molds 3 a and 3 b come into contact with each other at the dead center position, and the mold is clamped by the mold clamping cylinder 8.
- the force for attaching the piston 9 to the other end of the tie bar 7 is not limited to this.
- a hydraulic cylinder may be attached to the other end of the tie bar 7.
- the mold clamping cylinder 8 is provided on the fixed platen 1, but may be provided on the toggle support 4.
- the first link 13 is rotated in the direction of the arrow a via the shaft 16, and the first link 13 and the second link 14 are extended substantially in a straight line. , And the first link 13 is positioned by force and fixed. At this time, the molds 3a and 3b come into contact with each other to perform the warping, and the motor The first link 13 can be pressed against the stop 17 with a small torque and placed in a stable position.
- the first link 13 is moved to the oil chamber on the tie bar 17 side of the mold clamping cylinder 8 disposed at the other end of the four bars ⁇ .
- Supply hydraulic pressure pull the tie bar 7 through the piston 9, apply a uniform and stable mold clamp, and bring the molds 3a and 3b into close contact to perform mold clamping.
- the size of the motor can be reduced.
- the present invention solves the problem of the mold clamping device of the conventional electric injection molding machine, improves the durability of a toggle mechanism such as the single toggle mechanism, and increases the size of the mold injection.
- An object of the present invention is to provide a mold clamping device for a molding machine. Disclosure of the invention
- a fixed platen a lya platen provided to face the fixed platen, a ly platen provided between the fixed platen and the lyra platen, And a movable platen that moves forward and backward.
- the mold is attached to the fixed platen and the movable platen, and both are separated from each other.
- a motor support elastically supported with a biasing force smaller than a mold clamping force with respect to the lya platen; a motor fixed to the motor support; and a connection between the motor support and the movable platen; And a toggle mechanism for moving the movable platen in response to this.
- the toggle mechanism is activated by driving the motor.
- the movable platen moves between the lya platen and the fixed platen.
- reaction force transmitting member for directly transmitting a reaction force of the mold clamping force transmitted to the toggle mechanism to the ry platen without passing through a motor support.
- the motor support is elastically supported by the bias force smaller than the mold clamping force with respect to the rear platen, so that the motor support is urged toward the movable platen during the mold opening / closing operation, but moves toward the rear platen during the mold clamping operation. . Therefore, at the time of mold opening Sf, the drive shaft of the motor is a force supported by the bearing, and at the time of mold clamping, the reaction force generated by the mold clamping force is not transmitted to the bearing, but via the reaction force transmitting member. As a result, the bearing is not unevenly worn or damaged, and the durability of the toggle mechanism can be improved.
- Fig. 1 is a schematic view of a mold clamping device of a conventional electric injection molding machine
- Fig. 2 is a schematic diagram of a mold clamping device of the electric injection molding machine of the present invention
- Fig. 3 is an electric injection molding machine in a mold open state. It is principal part sectional drawing of the mold clamping apparatus of FIG. Best mode to make invention
- FIG. 2 is a schematic view of a mold clamping device of the electric injection molding machine according to the present invention.
- 1 is a fixed platen
- 2 is a movable platen
- each mold 3 a and 3 b are attached.
- Reference numeral 31 denotes a lya platen, and the movable platen 2 is moved by a single toggle mechanism 32 to perform a mold.
- each of the bars ⁇ slidably penetrates the movable platen 2 and is a toggle support not shown. It is fixed to.
- the single toggle mechanism 32 is provided between the movable platen 2 and the motor support 33 elastically supported by the lya platen 31, and the first toggle mechanism 32 is rotatably supported by the motor support 33.
- the shaft 16 of the first link 13 is connected to a drive shaft of a motor 35 (for example, a servo motor) via a speed reducer 34 composed of a planetary gear.
- the shaft 16 rotates integrally with the first link 13.
- the speed reducer 34 causes the rotation of the first link 13 via the shaft 16. Is transmitted to
- the shaft 16 is rotatably supported by the motor support 33 via rolling bearings 36 and 37.
- a disc spring 38 is provided between the motor support 33 and the ry platen 31, and the motor spring 33 is urged by the disc spring 38 in a direction away from the ry platen 31. This urging force is set to be smaller than the mold clamping force, and contracts when subjected to mold clamping force.
- Numeral 39 denotes a projection formed on the ry platen 31 for holding the disc spring 38 and receiving a reaction force of the mold clamping force. Then, the motor support 33 is guided by a pin 40 and is moved toward and away from the ry platen 31. In addition, a large diameter portion 41 is provided at the tip of the pin 40 so as to restrict the stroke of the motor support 33.
- the motor 35 is driven to make the first link 13 and the second link 14
- the molds 3a and 3b extend linearly and come into contact with each other to close the molds.
- a mold clamping cylinder (not shown) provided on the fixed platen 1 or toggle sabot operates and a mold clamping force is applied, a large mold clamping force is generated between the molds 3a and 3b, and The reaction force of the tightening force is transmitted to the shaft 16 via the movable platen 2, the bracket 15, the second link 14, and the first link 13.
- a rod 45 is provided as a reaction force transmitting member for transmitting the reaction force transmitted to the shaft 16 to the ry platen 31 without passing through the rolling bearings 36 and 37.
- the rod 45 has one end (the movable platen 2 side) penetrating through the motor support 33 and is opposed to a projection 39 formed on the lya platen 31 so as to be abuttingly disposed. between c the motors support 3 3 and the rod 4 5 ⁇ g with respect to the protrusions 3 9 receives Katashimeka vignetting be Beri bearing 4 six cereal as a guide means, by the sliding bearing 4 6 The rod 45 is guided and slides.
- FIG. 3 is a sectional view of a main part of a mold clamping device of the electric injection molding machine in a mold open state.
- the mold clamping device enters the mold opening operation, and the mold opening operation reduces the mold clamping force that was applied between the molds 3a and 3b. Without As a result, the reaction force of the mold clamping force, that is, the force for urging the motor support 33 in the direction of the platen 31 also disappears. Therefore, as shown in FIG. 3, the disc spring 38 moves the motor support 33 toward the fixed platen 1, and separates the rod 45 from the protrusion 39. The motor support 33 stops at a position where it is locked by the enlarged diameter portion 41 of the pin 40, and stands by in that state. At this time, no load is applied between the shaft 16, the slide bearing 47 and the rod 45. Therefore, the shaft 16 is supported by the roller force bearings 36 and 37, and can smoothly roll.
- the motor support 33 rolls the reaction force transmitted to the shaft 16 via the bolts 36 and 37, and moves along the pin 40 without bending (bending) the disc spring 38. Move to the Lya platen 3 1 side.
- rod 4 5
- the rolling bearings 36 and 37 receive only the reaction force of the force required for opening and closing the mold during the mold opening and closing operation and the bending force of the disc spring 38, and the reaction force of the mold «the clamping force during operation. You will not receive it.
- a disc spring 38 is disposed at the center of the lya platen 31, and the motor support 33 is urged by the disc spring 38, but around the pin 40.
- a belleville spring 38 or a coil spring can also be arranged on the plate.
- the mold clamping device of the electric injection molding machine of the present invention has a toggle mechanism, and is suitable for use in an electric injection molding machine that performs mold f and mold clamping using a motor as a drive source.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3146163A JPH04369519A (ja) | 1991-06-18 | 1991-06-18 | 電動射出成形機の型締装置 |
| EP93900423A EP0645228A1 (en) | 1991-06-18 | 1992-12-18 | Mold clamping apparatus for electric injection molding machines |
| US08/284,449 US5513977A (en) | 1991-06-18 | 1992-12-18 | Clamping device for electric-powered injection molding machine |
| PCT/JP1992/001666 WO1994014594A1 (fr) | 1991-06-18 | 1992-12-18 | Appareil de verrouillage du moule dans une machine electrique de moulage par injection |
| KR1019940702841A KR950700160A (ko) | 1992-12-18 | 1994-08-18 | 전동 사출성형기의 형조임장치 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3146163A JPH04369519A (ja) | 1991-06-18 | 1991-06-18 | 電動射出成形機の型締装置 |
| PCT/JP1992/001666 WO1994014594A1 (fr) | 1991-06-18 | 1992-12-18 | Appareil de verrouillage du moule dans une machine electrique de moulage par injection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1994014594A1 true WO1994014594A1 (fr) | 1994-07-07 |
Family
ID=26433505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1992/001666 Ceased WO1994014594A1 (fr) | 1991-06-18 | 1992-12-18 | Appareil de verrouillage du moule dans une machine electrique de moulage par injection |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0645228A1 (ja) |
| JP (1) | JPH04369519A (ja) |
| WO (1) | WO1994014594A1 (ja) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2504910B2 (ja) * | 1993-05-18 | 1996-06-05 | ツオイス株式会社 | 射出成形機のトグル式型締装置、及びこれに付加する突出機構 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4912577B1 (ja) * | 1970-06-23 | 1974-03-26 | ||
| JPH01280521A (ja) * | 1988-05-06 | 1989-11-10 | Fanuc Ltd | ダイレクトドライブ式型締装置 |
| JPH01317715A (ja) * | 1988-06-20 | 1989-12-22 | Fanuc Ltd | クランク式型締機構 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3507012A (en) * | 1967-09-21 | 1970-04-21 | Katashi Aoki | Mold closing apparatus for an injection molding machine |
| US3642403A (en) * | 1969-06-02 | 1972-02-15 | Jaroslav J Havlik | Injection molding machine |
-
1991
- 1991-06-18 JP JP3146163A patent/JPH04369519A/ja not_active Withdrawn
-
1992
- 1992-12-18 EP EP93900423A patent/EP0645228A1/en not_active Withdrawn
- 1992-12-18 WO PCT/JP1992/001666 patent/WO1994014594A1/ja not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4912577B1 (ja) * | 1970-06-23 | 1974-03-26 | ||
| JPH01280521A (ja) * | 1988-05-06 | 1989-11-10 | Fanuc Ltd | ダイレクトドライブ式型締装置 |
| JPH01317715A (ja) * | 1988-06-20 | 1989-12-22 | Fanuc Ltd | クランク式型締機構 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP0645228A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04369519A (ja) | 1992-12-22 |
| EP0645228A4 (en) | 1995-01-03 |
| EP0645228A1 (en) | 1995-03-29 |
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