CN211616505U - Mould closing mechanism - Google Patents
Mould closing mechanism Download PDFInfo
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- CN211616505U CN211616505U CN201921977972.0U CN201921977972U CN211616505U CN 211616505 U CN211616505 U CN 211616505U CN 201921977972 U CN201921977972 U CN 201921977972U CN 211616505 U CN211616505 U CN 211616505U
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- pull rod
- die plate
- positioning device
- clamping
- movable
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Abstract
The utility model discloses a mold clamping mechanism, which belongs to the technical field of injection molding machines, and comprises a fixed mold plate, a movable mold plate, a plurality of elastic pull rods, a plurality of mold clamping force sensors and an adjustable positioning piece; the plurality of pull rods are arranged in parallel and penetrate through the fixed die plate and the movable die plate, the plurality of die locking force sensors are respectively arranged on the plurality of pull rods, and the adjustable positioning piece is used for positioning the axial position of the movable die plate or the fixed die plate on the pull rods. The utility model provides an initial pretightning force of adjustable pull rod of locking mechanism can reduce the working stress width of cloth of pull rod by a wide margin, relies on locking mechanism self to produce the pretightning force, need not extra frock, also need not to carry out the installation of frock in a large amount of time and dismantles.
Description
Technical Field
The utility model relates to an injection molding machine technical field especially relates to a locking mechanism.
Background
The clamping mechanism of the injection molding machine generally comprises a fixed template, a movable template, a tail plate and a pull rod. The pull rod is fixed through the pull rod nut, and due to the fact that the diameter of the pull rod is large, the nut can only be screwed to a proper position in a conventional mode, but necessary pre-tightening force cannot be generated.
The existing problems are that:
under the condition of no pretightening force, the pull rod bears the pulsating cyclic load and needs to bear the stress amplitude sigma from 0 to the maximum stress, so that the fatigue life performance of the pull rod is highly required. The design requirements are usually met by using alloy steel after heat treatment, which makes the production cost of the pull rod high.
SUMMERY OF THE UTILITY MODEL
The above is not enough to prior art, the utility model aims to solve the technical problem that the utility model aims to provide a locking mechanism for when the compound die, the deformation force variation range too big problem of pull rod among the solution prior art.
The utility model provides a technical scheme that its technical problem adopted is:
preferably, the mold clamping mechanism comprises a fixed mold plate, a movable mold plate, a plurality of elastic pull rods, a plurality of mold clamping force sensors and an adjustable positioning piece; the plurality of pull rods are arranged in parallel and penetrate through the fixed die plate and the movable die plate, the die locking force sensors are arranged on the plurality of pull rods respectively, and the adjustable positioning piece is used for positioning the axial positions of the movable die plate or the fixed die plate on the pull rods.
Preferably, the adjustable positioning part comprises a pull rod nut and a ferrule positioning device, and the pull rod nut and the ferrule positioning device position the fixed die plate or the movable die plate.
Preferably, the pull rod nut and the ferrule positioning device are sleeved on the pull rod.
Preferably, the pull rod nut and the ferrule positioning device are in threaded connection with the pull rod.
Preferably, the pull rod nut and the ferrule positioning device are in threaded connection with the pull rod and position the fixed die plate at the axial position of the pull rod by clamping.
Preferably, the pull rod is provided with a first positioning groove for positioning a pull rod nut and a second positioning groove for positioning the ferrule positioning device.
Preferably, a gasket with a preset thickness is arranged between the fixed die plate and the pull rod nut or the clamping sleeve positioning device.
The utility model discloses can reduce the working stress width of a wide margin of pull rod, the maximum width of a wide margin that falls exceeds 50%, pull rod uses ordinary steel can satisfy the designing requirement under this kind of condition. The utility model discloses rely on locking mechanism self to produce the pretightning force, need not extra frock, consequently also need not carry out the installation of frock in a large amount of time and dismantle.
Drawings
Fig. 1 is a schematic structural view of a mold clamping mechanism in example 1.
Fig. 2 is a schematic structural view of the cooperation between the pull rod and the adjustable positioning member in embodiment 1.
Fig. 3 is a schematic view of the deformation force applied to the tie bar in embodiment 3.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
Example 1
Referring to fig. 1-3, the present invention discloses a mold clamping mechanism, and the injection molding machine has a mold clamping mechanism 10. The pre-tightening force of the die clamping mechanism 10 can be adjusted, specifically, the pre-tightening force in the die clamping mechanism 10 is adjusted, so that the die clamping mechanism 10 has the initial pre-tightening force, the amplitude of stress borne by the pull rod 4 during die clamping is further reduced, and the service life of the pull rod 4 is prolonged.
The mold clamping mechanism 10 comprises a fixed mold plate 6, a movable mold plate 2, a plurality of elastic pull rods 4, a plurality of mold clamping force sensors 5 and an adjustable positioning piece; a plurality of pull rods 4 are arranged in parallel and penetrate through the fixed die plate 6 and the movable die plate 2, a plurality of die locking force sensors 5 are respectively arranged on the pull rods 4, and the adjustable positioning piece is used for positioning the axial positions of the movable die plate 2 or the fixed die plate 6 on the pull rods 4.
In this embodiment, the adjustable positioning element can adjust the position of the movable die plate 2 or the fixed die plate on the pull rod 4, then position the movable die plate 2 or the fixed die plate through the adjustable positioning element, and adjust the pre-tightening force of the die clamping mechanism 10 by adjusting the position of the movable die plate 2 or the fixed die plate on the pull rod 4, where the pre-tightening force is generated by the tensile deformation of the pull rod 4.
The adjustable positioning piece comprises a pull rod nut 1 and a clamping sleeve positioning device, and the pull rod nut 1 and the clamping sleeve positioning device position the fixed template 6 or the movable template 2. The fixed die plate or the movable die plate 2 is positioned between the pull rod nut 1 and the ferrule positioning device, and the positions of the pull rod nut 1 and the ferrule positioning device on the pull rod 4 are positioned, so that the position of the fixed die plate 6 or the movable die plate 2 on the pull rod 4 can be positioned.
The pull rod nut 1 and the clamping sleeve positioning device are both sleeved on the pull rod 4. The pull rod 4 penetrates through the pull rod nut 1 and the ferrule positioning device, the pull rod nut 1 or the ferrule positioning device is used as a positioning reference point, the position of the fixed template or the movable template 2 on the pull rod 4 is ensured, the position of the adjustable positioning piece on the pull rod 4 is used as the positioning reference point, and the position accuracy of the movable template 2 or the fixed template on the pull rod 4 can be ensured.
The pull rod nut 1 and the clamping sleeve positioning device are in threaded connection with the pull rod 4; the position of the movable template 2 or the fixed template 6 is well adjusted, the position of the movable template 2 or the fixed template can be adjusted by rotating the pull rod nut 1 and the clamping sleeve positioning device, and the movable template 2 or the fixed template 6 can be positioned by screwing the pull rod nut 1 and the clamping sleeve positioning device. The pull rod nut 1 and the clamping sleeve positioning device are in threaded connection with the pull rod 4 and position the fixed die plate at the axial position of the pull rod 4 through clamping.
Example 2
Example 2 differs from example 1 in that:
the pull rod 4 is provided with a first positioning groove for positioning the pull rod nut 1 and a second positioning groove for positioning the ferrule positioning device. And a gasket with preset thickness is arranged between the fixed template and the pull rod nut 1 or the clamping sleeve positioning device. In this embodiment, first, the draw bar nut 1 and the ferrule positioning device are respectively positioned in the first positioning groove and the second positioning groove, the fixed die plate 6 or the movable die plate 2 is positioned between the draw bar nut 1 and the ferrule positioning device, a gasket with a preset thickness is padded between the draw bar nut 1 and the movable die plate 2, or a gasket with a preset thickness is padded between the movable die plate 2 and the ferrule positioning device, so as to adjust the position of the movable die plate 2 on the draw bar 4, and further adjust the deformation stress of the draw bar 4 during die assembly.
Example 3
The method for reducing the stress pair of the pull rod of the injection molding machine during mold closing by using the mold closing mechanism in the embodiment 1 and the embodiment 2 adopts the following steps to debug the mold closing mechanism 10 before the injection molding machine operates:
s1, the position of the movable template 2 or the fixed template on the pull rod 4 is adjusted through the adjustable positioning piece to adjust the deformation force of each pull rod 4, so that the deformation force of each pull rod 4 reaches the same preset value when the mold is closed; so that each pull rod 4 keeps consistent deformation force;
s2, setting the maximum mold clamping force of the injection molding machine, and measuring the maximum deformation force F of each pull rod 4 during mold clamping; the maximum mold clamping force here refers to the maximum mold clamping force that can be achieved during mold clamping.
And S3, setting the pre-tightening mold closing force of the injection molding machine, measuring the pre-tightening deformation force Fp of each pull rod 4 during mold closing, and locking the position of the movable mold plate 2 or the positioning plate on the pull rod 4 through the adjustable positioning piece.
In S1, when the deformation forces of the tie bars 4 are adjusted to the same preset value, the clamping mechanism 10 is first adjusted to the clamping state, and the deformation forces generated by the tie bars 4 are respectively measured by the plurality of clamping force sensors 5; the deformation force of each pull rod 4 is adjusted by adjusting the position of the movable template 2 or the fixed template on the pull rod 4 through the adjustable positioning piece, and the die opening and die closing and the position action of adjusting the movable template 2 or the fixed template are repeated, so that the deformation force of each pull rod 4 reaches the same preset value during die closing.
The utility model discloses an before the operation of injection molding machine, make locking mechanism 10 have initial pretightning force for each pull rod 4 has initial pretension deformability Fp, when the compound die, each pull rod 4 can produce deformation, and the deformability of pull rod 4 also changes gradually, and when the compound die power reaches the biggest, the deformability F of each pull rod 4 also is the biggest, compares with not establishing the pretightning force originally, and the vice sigma of stress of pull rod 4 is compared forPAnd becomes smaller. When no pre-tightening force is setThe stress pair of the tie rod 4 is σ, F ═ σ, σP＝F-Fp，σ>σP。
The utility model discloses can reduce the working stress width of a wide margin pull rod 4, the maximum width of a wide margin that falls exceeds 50%, pull rod 4 uses ordinary steel can satisfy the designing requirement under this kind of condition. The utility model discloses rely on locking mechanism 10 self to produce the pretightning force, need not extra frock, consequently also need not carry out the installation of frock in a large amount of time and dismantle.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (7)
1. A die clamping mechanism is characterized by comprising a fixed die plate, a movable die plate, a plurality of elastic pull rods, a plurality of die clamping force sensors and an adjustable positioning piece; the plurality of pull rods are arranged in parallel and penetrate through the fixed die plate and the movable die plate, the die locking force sensors are arranged on the plurality of pull rods respectively, and the adjustable positioning piece is used for positioning the axial positions of the movable die plate or the fixed die plate on the pull rods.
2. The clamping mechanism of claim 1, wherein: the adjustable positioning piece comprises a pull rod nut and a clamping sleeve positioning device, and the pull rod nut and the clamping sleeve positioning device position the fixed template or the movable template.
3. The clamping mechanism of claim 2, wherein: the pull rod nut and the clamping sleeve positioning device are sleeved on the pull rod.
4. The clamping mechanism of claim 2, wherein: the pull rod nut and the clamping sleeve positioning device are in threaded connection with the pull rod.
5. The clamping mechanism of claim 2, wherein: the pull rod nut and the clamping sleeve positioning device are in threaded connection with the pull rod and position the fixed die plate at the axial position of the pull rod through clamping.
6. The clamping mechanism of claim 2 or 5, wherein: the pull rod is provided with a first positioning groove for positioning the pull rod nut and a second positioning groove for positioning the ferrule positioning device.
7. The clamping mechanism of claim 6, wherein: and a gasket with preset thickness is arranged between the fixed die plate and the pull rod nut or the clamping sleeve positioning device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921977972.0U CN211616505U (en) | 2019-11-15 | 2019-11-15 | Mould closing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921977972.0U CN211616505U (en) | 2019-11-15 | 2019-11-15 | Mould closing mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211616505U true CN211616505U (en) | 2020-10-02 |
Family
ID=72625639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921977972.0U Active CN211616505U (en) | 2019-11-15 | 2019-11-15 | Mould closing mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211616505U (en) |
-
2019
- 2019-11-15 CN CN201921977972.0U patent/CN211616505U/en active Active
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