CN210733175U - Injection molding machine mold locking oil cylinder with piston and pull rod shaft shoulder matched - Google Patents
Injection molding machine mold locking oil cylinder with piston and pull rod shaft shoulder matched Download PDFInfo
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- CN210733175U CN210733175U CN201920861993.XU CN201920861993U CN210733175U CN 210733175 U CN210733175 U CN 210733175U CN 201920861993 U CN201920861993 U CN 201920861993U CN 210733175 U CN210733175 U CN 210733175U
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- mold locking
- oil cylinder
- pull rod
- piston
- locking oil
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Abstract
A piston and tie rod shaft shoulder type matched injection molding machine mold locking oil cylinder comprises a tie rod, a mold locking oil cylinder barrel, a piston, an anti-loosening pressing plate and a mold locking oil cylinder rear cover; the rear cover of the mold locking oil cylinder is fixed at the rear part of the mold locking oil cylinder barrel to form an oil cylinder body of the mold locking oil cylinder; the piston is arranged in the inner cavity of the mold locking oil cylinder barrel, and the pull rod penetrates through the piston after penetrating through the mold locking oil cylinder barrel; the tail part of the pull rod is T-shaped, the tail part of the mold locking piston is provided with an installation space corresponding to the T-shaped tail part of the pull rod, the tail part of the pull rod is arranged in the installation space, and the anti-loosening pressure plate is fixed on the mold locking piston through a screw and compresses the pull rod. The utility model has the advantages that: reduced stress concentration, the utility model discloses a shaft hole direct mount of pull rod and piston, easily processing and assembly.
Description
Technical Field
The utility model relates to an injection molding machine mode locking hydro-cylinder.
Background
A pull rod in the existing two-plate injection molding machine mold locking oil cylinder structure is also used as a mold locking pull rod, and a piston is directly connected with the end part of the pull rod through threads.
In the normal working process of the injection molding machine, the action of the deformation force of the pull rod in each mode locking process is from the contact of the mold to the peak value after locking, and the action is from small to large; and opening the mold is vice versa. The cross section of the pull rod is subjected to alternating stress, and the thread structure is provided with stress concentration, so that fatigue failure is easy to occur, and the breakage failure of the pull rod is caused.
In order to eliminate the stress concentration, it is generally necessary to enlarge a root fillet or the like, but the improvement cannot be achieved due to the limitation of the thread size. Meanwhile, the manufacturing precision requirement of the threads is high, the processing difficulty is high, and the early cracks are usually caused by tiny manufacturing defects in the production process, so that the high requirement on quality control is provided.
Disclosure of Invention
The utility model aims to solve the technical problem that overcome the above-mentioned not enough of prior art and provide a piston and pull rod shaft shoulder complex injection molding machine clamping cylinder, make its stress dispersion, easily processing and satisfy operation requirement.
The utility model provides a technical scheme that above-mentioned problem adopted does: a piston and tie rod shaft shoulder type matched injection molding machine mold locking oil cylinder comprises a tie rod, a mold locking oil cylinder barrel, a piston, an anti-loosening pressing plate and a mold locking oil cylinder rear cover; the rear cover of the mold locking oil cylinder is fixed at the rear part of the mold locking oil cylinder barrel to form an oil cylinder body of the mold locking oil cylinder; the piston is arranged in the inner cavity of the mold locking oil cylinder barrel, and the pull rod penetrates through the piston after penetrating through the mold locking oil cylinder barrel; the tail part of the pull rod is T-shaped, the tail part of the mold locking piston is provided with an installation space corresponding to the T-shaped tail part of the pull rod, the tail part of the pull rod is arranged in the installation space, and the anti-loosening pressure plate is fixed on the mold locking piston through a screw and compresses the pull rod.
Better, above-mentioned pull rod straight flange still sets up the radius angle with horizontal border juncture, can reduce pull rod stress concentration like this, improves the fatigue strength of pull rod, and the template deformation is little to the influence of structure, safe and reliable more.
The utility model has the advantages that: because of the adoption of the T-shaped pull rod, the piston and the tail part of the pull rod form a shaft shoulder annular contact surface, and the axial load is borne by the shaft shoulder annular contact surface, so that the stress concentration is reduced.
Because major diameter screw thread closes the assembly soon and needs special frock, otherwise the assembly precision is difficult to guarantee, and damages the flank of tooth easily, consequently, compares with threaded connection, the utility model discloses a pull rod and the shaft hole direct mount of piston, easily processing and assembly.
Drawings
Fig. 1 is the schematic view of the whole structure of the injection molding machine mold-locking cylinder with the piston and the pull rod shoulder in the embodiment of the present invention.
Fig. 2 is a sectional view of the injection molding machine mold-locking cylinder with the piston and the pull rod shoulder in the embodiment of the present invention.
Detailed Description
The present invention will be further explained with reference to the drawings and the embodiments.
As shown in fig. 1 and 2, a mold locking oil cylinder of an injection molding machine with a piston and a pull rod shoulder matched with each other comprises a pull rod 1, a mold locking oil cylinder barrel 2, a mold locking piston 3, a locking pressing plate 4 and a mold locking oil cylinder rear cover 5.
The mold locking oil cylinder rear cover 5 is fixed at the rear part of the mold locking oil cylinder barrel 2 through a screw 10 to form an oil cylinder body of the mold locking oil cylinder.
The mold locking piston 3 is arranged in the mold locking oil cylinder barrel 2, the mold locking piston 3 is sealed with the front part of the mold locking oil cylinder rear cover 5 and can move back and forth on the front part of the mold locking oil cylinder rear cover 5, and thus the mold locking piston 3 moves more stably.
The pull rod 1 is T-shaped, a transverse edge 11 of the pull rod penetrates through a middle through hole of the mold locking piston 3, correspondingly, an installation space 31 corresponding to a straight edge 12 of the T-shaped tail of the pull rod 1 is arranged at the tail of the mold locking piston 3, and the straight edge 12 of the pull rod 1 is arranged in the installation space 31 and limited by the mold locking piston 3.
The anti-loosening pressure plate 4 is fixed on the mold locking piston 3 through a screw 9, and the screw 9 applies tightening torque to compress the pull rod 1 so as to eliminate axial clearance between the mold locking piston 3 and the shaft shoulder of the pull rod 1.
The anti-loosening pressure plate 4 is provided with the counter bore 41, and the screw 9 is placed in the counter bore 41, so that the anti-loosening pressure plate 4 can be better fixed.
The junction of the straight edge and the transverse edge 11 of the pull rod 1 is also provided with a fillet 13, so that the stress concentration of the pull rod can be reduced, and the fatigue resistance of the pull rod is improved.
Claims (2)
1. The utility model provides a piston and pull rod shaft shoulder formula complex injection molding machine clamping cylinder which characterized in that: comprises a pull rod, a mold locking oil cylinder barrel, a piston, a locking pressing plate and a mold locking oil cylinder rear cover; the rear cover of the mold locking oil cylinder is fixed at the rear part of the mold locking oil cylinder barrel to form an oil cylinder body of the mold locking oil cylinder; the piston is arranged in the inner cavity of the mold locking oil cylinder barrel, and the pull rod penetrates through the piston after penetrating through the mold locking oil cylinder barrel; the tail part of the pull rod is T-shaped, the tail part of the mold locking piston is provided with an installation space corresponding to the T-shaped tail part of the pull rod, the tail part of the pull rod is arranged in the installation space, and the anti-loosening pressure plate is fixed on the mold locking piston through a screw and compresses the pull rod.
2. The injection molding machine mold locking cylinder with the piston and the draw bar shoulder matched according to claim 1, wherein: and a fillet is arranged at the junction of the straight edge and the transverse edge of the pull rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920861993.XU CN210733175U (en) | 2019-06-10 | 2019-06-10 | Injection molding machine mold locking oil cylinder with piston and pull rod shaft shoulder matched |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920861993.XU CN210733175U (en) | 2019-06-10 | 2019-06-10 | Injection molding machine mold locking oil cylinder with piston and pull rod shaft shoulder matched |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210733175U true CN210733175U (en) | 2020-06-12 |
Family
ID=70986552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920861993.XU Active CN210733175U (en) | 2019-06-10 | 2019-06-10 | Injection molding machine mold locking oil cylinder with piston and pull rod shaft shoulder matched |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210733175U (en) |
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2019
- 2019-06-10 CN CN201920861993.XU patent/CN210733175U/en active Active
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