CN109382985B - Mold closing mechanism of injection machine - Google Patents
Mold closing mechanism of injection machine Download PDFInfo
- Publication number
- CN109382985B CN109382985B CN201811363776.4A CN201811363776A CN109382985B CN 109382985 B CN109382985 B CN 109382985B CN 201811363776 A CN201811363776 A CN 201811363776A CN 109382985 B CN109382985 B CN 109382985B
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- mold
- plate
- template
- cambered surface
- movable
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- 230000007246 mechanism Effects 0.000 title claims abstract description 43
- 238000002347 injection Methods 0.000 title claims abstract description 33
- 239000007924 injection Substances 0.000 title claims abstract description 33
- 238000001746 injection moulding Methods 0.000 claims description 12
- 230000007704 transition Effects 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000004458 analytical method Methods 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 abstract 1
- 230000006872 improvement Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention relates to a mold closing mechanism of an injection machine, which is used for realizing the purposes of increasing the rigidity of the mold plate and improving the mold closing precision by carrying out the optimization design on the integral structure of a front mold plate and a movable mold plate according to the stress condition analysis of the front mold plate and the movable mold plate when the injection machine performs mold closing operation and converting the mold closing force of the two mold plates through a novel mold plate structure. The front template and the movable template comprise a clamping force loading plate, an annular hollow arc and a die mounting plate; the annular hollow cambered surface support is positioned between the mold locking force loading plate and the mold mounting plate, and the front template structure is hollowed out, so that the template quality is reduced while the rigidity of the template is ensured. The mold clamping mechanism of the injection machine has the following advantages: 1. the rigidity of the closed hollow structure of the front template and the movable template is high, the material utilization rate is high, and the manufacturing cost is low; 2. the front template and the movable template counteract the mode locking force and the reaction force given by the die through the cambered surface supporting structure, so that the stress deformation of the die mounting plate is reduced, and the injection precision is improved.
Description
Technical Field
The invention relates to the field of injection molding machines, in particular to a high-elasticity mold clamping mechanism which is optimally designed by analyzing the stress of a front mold plate and a movable mold plate and is used for improving the stress deformation of a mold during mold clamping and improving the injection molding precision of products.
Background
The structural design of the front template and the movable template of the mold closing mechanism of the injection machine directly influences the quality and the manufacturing cost of injection molding products. The structural form of the template determines the stress and deformation conditions of the template and the die arranged on the template during die assembly, and ensures that the small deformation of the die during die assembly is a basic guarantee for realizing high rigidity and high precision injection molding.
In the mold closing mechanism, a mold closing oil cylinder pushes a movable mold plate to move forward through a toggle mechanism, and a mold is locked by utilizing the mechanism force amplification characteristic; after injection is completed, the oil cylinder drives the movable mould plate to retreat through the toggle mechanism, and mould opening is completed. The front template and the movable template of the traditional injection machine mold closing mechanism are in an integrated rectangular plate-shaped structure, when the injection machine mold closing mechanism is locked, one side of the front template is pulled by four corner position pull rods, and the mold mounting side is pressed by a mold. One side of the movable mould plate is pressed by the mould, the other side of the movable mould plate is pressed by the toggle rod mechanism, the mould forces of the two mould plates are concentrated in the middle of the mould plate, and the forces of the other side of the movable mould plate are distributed on the upper part and the lower part of the mould plate, so that the deformation of the mounting mould plate, the mould locking force is uneven, the mould locking force around the mould plate is large, and the stress on the central position is small. The mould clamping mechanism needs to provide larger mould locking force to meet the mould locking requirement, and uneven pressure on the mould is easy to cause poor exhaust, so that the quality of injection products is influenced, and in addition, uneven distribution of the mould locking force for a long time is not beneficial to protecting the mould.
In recent years, the injection molding industry provides a novel front template with supporting ribs, wherein the front template can change the stress of the front template and the deformation under the condition of clamping, but when the front template is stressed, the force is mainly concentrated on the supporting ribs, the working frequency of the injector is high, the fatigue strength of the injector can be reduced after the time, and the service life and the rigidity of the template can be enhanced to a certain extent by changing the structure of the supporting ribs.
Disclosure of Invention
The invention aims to improve the stress condition of a mold plate of a mold closing mechanism of an injection molding machine, improve the problems of stress and deformation uniformity of a mold during mold closing, and provides a mold closing structural form of the injection molding machine with a novel structure. The stress condition of the two templates during mold locking is simulated and analyzed, so that the structural design is optimized, the stress deformation of the mold is improved, the stress concentration during working is avoided, and the service life of the injection machine is prolonged. The invention provides a novel front template and movable template structure form, and an annular hollow cambered surface supporting structure is uniformly used in the design of the two templates. The annular hollow cambered surface separates deformation and stress, the force is applied to the die mounting plate, and the deformation occurs on the cambered surface structure, so that the die is basically not deformed during die assembly, and the injection molding precision is further ensured. The invention also provides a cross section cambered surface supporting cambered surface 3 of the annular hollow structure 1/2 The design principle of H ", i.e. the design of the cambered surface of the cross section, follows the principle that half the chord length is equal to 1.732 times the chord height. As can be found from numerical simulation analysis, if L is longer than 3 1/2 H, the rigidity of the front template is obviously reduced, and stress concentration is easy to occur; if L length is less than 3 1/2 And H, the die mounting plate is obviously deformed. Only L length design choices are at 3 1/2 Near H, the template may achieve optimal mechanical properties.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the injection machine mold clamping mechanism comprises a mold clamping mechanism, a front mold plate and a movable mold plate, wherein the mold clamping mechanism is of a toggle rod type or a hydraulic type, and the front mold plate and the movable mold plate comprise a mold clamping force loading plate, an annular hollow cambered surface supporting structure and a mold mounting plate; the annular hollow cambered surface support, inside cavity, be annular cambered surface all around, the top is fixed with the mode locking power loading board connection, the bottom is fixed with the mould mounting panel connection, forms confined hollow structure.
The invention relates to a mold closing mechanism of an injection machine, which is used as a structural improvement, wherein the outer sides of annular hollow cambered surface supporting structures of a front template and a movable template are in a horn mouth shape with large top diameter and small bottom diameter, the structure is hollow in the middle, and the annular cambered surfaces around the front template and the movable template are in smooth transition.
The invention relates to a mold closing mechanism of an injection machine, which is used as a structural improvement, wherein the outer sides of annular hollow cambered surface supporting structures of a front template and a movable template are in a horn mouth shape with large top diameter and small bottom diameter, the structure is hollow in the middle, the annular cambered surfaces around the structure are in smooth transition, and the cambered surface design of the cross section of the mechanism follows the cambered surface principle. The invention relates to a mold closing mechanism of an injection machine, which is used as a structural improvement, and a boss structure is downwards added at a pull rod hole of a mold locking force loading plate of a front mold plate.
The invention relates to a mold clamping mechanism of an injection machine, which is used as an improvement of weight reduction, and the periphery of a mold mounting plate of a movable mold plate is hollowed out by a quarter of circular arc part.
The invention relates to a mold clamping mechanism of an injection machine, which is used as an improvement of weight reduction, and a front mold plate is provided with a hole at an injection passage in the middle of a mold clamping force loading plate.
Compared with the prior art, the mold closing mechanism of the injection machine has the advantages that: the front template of the mold closing mechanism is supported by the annular hollow cambered surface to form a closed hollow structure, so that the whole rigidity is high, the weight is light, the stress of the mold locking force loading plate is more uniform, the mechanism is simple, and the processing and the manufacturing are convenient; the surface stress of the clamping force loading plate is more uniform, and the utilization rate of materials is improved. The design that the movable mould board adopted annular cavity cambered surface to support will reduce the deformation that takes place of the mould mounting panel of movable mould board. When the die is assembled, the front template and the movable template adopt the design of the annular hollow cambered surface supporting structure, so that the deformation mainly occurs at the cambered surface structure, and the stress is mainly distributed on the mounting plate of the die, thereby reducing the deformation of the die after the die is assembled and locked.
Drawings
FIG. 1 is a schematic view of the positions of a front mold plate and a movable mold plate of an injection molding machine in a mold clamping mechanism of an injection molding machine according to the present invention.
FIG. 2 shows an arc surface 3 of a front mold plate arc surface support of a mold clamping mechanism of an injection machine according to the present invention 1/2 H' design principle schematic diagram.
FIG. 3 is a schematic view showing the overall structure of a front mold plate of a mold clamping mechanism of an injection machine according to the present invention.
Fig. 4 is a schematic view of a partial (partially cut-away) structure of a front platen of a clamping mechanism of an injection machine according to the present invention.
Fig. 5 is a schematic view showing the structure of a movable platen (right side view) of a mold clamping mechanism of an injection machine according to the present invention.
FIG. 6 is a schematic view showing the overall structure of a movable platen of a mold clamping mechanism for an injection machine according to the present invention.
Fig. 7 is a schematic view of a part (cross-section) of a movable platen of a mold clamping mechanism of an injection machine according to the present invention.
FIG. 8 is a force-bearing schematic diagram of a front mold plate and a movable mold plate in a clamping mechanism of an injection machine according to the present invention.
In the figure: 1. front template clamping force loading plate, 2, front template annular hollow cambered surface supports, 3, front template mould mounting plate, 4, injection channel, 5, notch type through hole, 6, T type groove, 7, pull rod guide holder, 8, boss structure, 9, supporting legs, 10, movable template mould mounting plate, 11, movable template annular hollow cambered surface supports, 12, movable template clamping force loading plate, 13, movable template sliding legs, 14, pull rod holes.
Detailed Description
The invention discloses a mold clamping mechanism of an injection machine, which comprises a mold clamping mechanism, a front template and a movable template, wherein the front template comprises a front template mold clamping force loading plate 1, a front template annular hollow cambered surface support 2 and a front template mold mounting plate 3, and the movable template comprises a movable template mold mounting plate 10, a movable template annular hollow cambered surface support 11 and a movable template mold clamping force loading plate 12. The four corners of the front template locking force loading plate 1 are provided with pull rod guide seats 7, supporting legs 9 are arranged below the front template, the lower surface of the front template locking force loading plate 1 is connected with the front template annular hollow cambered surface support 2, the four corners of the movable template locking force loading plate 12 are provided with pull rod holes 14, the lower surface of the movable template locking force loading plate 12 is connected with the movable template annular hollow cambered surface support 11, and movable template sliding legs 13 are arranged below the movable template; the middle parts of the front template annular hollow cambered surface support 2 and the movable template annular hollow cambered surface support 11 are hollow structures, the peripheral annular cambered surfaces are in transition, and as shown in fig. 2, the lower surfaces of the front template annular hollow cambered surface support 2 and the movable template annular hollow cambered surface support are fixed with the front template die mounting plate 3 and the movable template die mounting plate 10; the injection channel 4 in the middle of the front template is provided with a notch type through hole 5; a boss structure 8 is arranged at the pull rod guide seat 7; the die mounting plates of the front die plate and the movable die plate are provided with T-shaped grooves 6. The movable platen receiving arm 12 receives the clamping force given by the toggle mechanism.
Analyzing stress conditions of a mold closing mechanism of the injection molding machine:
as shown in fig. 1 and 8, the four corners of the clamping force loading plate of the front template are subjected to the tensile force of the pull rod, the annular hollow cambered surface supporting structure converts the tensile force at the pull rod into the pressure along the annular hollow cambered surface supporting structure, and the deformation caused by the clamping force occurs at the cambered surface structure. The closed center structure has the advantage of high rigidity, improves the utilization rate of materials, and ensures the shape and the dimensional accuracy of injection products because the mold mounting plates of the front mold plate and the movable mold plate basically do not deform during mold closing.
Claims (2)
1. The utility model provides an injection machine locking mechanism which characterized in that: the device comprises a die clamping mechanism, a front die plate and a movable die plate, wherein the die clamping mechanism is of a toggle rod type or a hydraulic type, and the front die plate and the movable die plate comprise a die clamping force loading plate, an annular hollow cambered surface supporting structure and a die mounting plate; the annular hollow cambered surface is supported, the inside is hollow, the periphery of the annular hollow cambered surface is provided with an annular cambered surface, the top of the annular hollow cambered surface is fixedly connected with the mold locking force loading plate, and the bottom of the annular hollow cambered surface is fixedly connected with the mold mounting plate to form a closed hollow structure; the outer sides of the annular hollow cambered surface supporting structures of the front template and the movable template are in a horn mouth shape with large top diameter and small bottom diameter, the structures are hollow in the middle, and the annular cambered surfaces around the structures are in smooth transition; the design of the cambered surface of the cross section follows the principle that half of the chord length is equal to 1.732 times of the chord height; the front template is arranged at a pull rod hole of the clamping force loading plate, and a boss structure is downwards added; the periphery of the die mounting plate of the movable die plate is hollowed out by a quarter of the arc part.
2. The injection molding machine clamping mechanism of claim 1, wherein: the front mold plate is provided with an opening at the injection channel in the middle of the mold locking force loading plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811363776.4A CN109382985B (en) | 2018-11-16 | 2018-11-16 | Mold closing mechanism of injection machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811363776.4A CN109382985B (en) | 2018-11-16 | 2018-11-16 | Mold closing mechanism of injection machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109382985A CN109382985A (en) | 2019-02-26 |
| CN109382985B true CN109382985B (en) | 2024-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811363776.4A Active CN109382985B (en) | 2018-11-16 | 2018-11-16 | Mold closing mechanism of injection machine |
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| Country | Link |
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| CN (1) | CN109382985B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112078091A (en) * | 2020-09-24 | 2020-12-15 | 泰瑞机器股份有限公司 | Inclined strut type two-plate injection machine movable template |
| CN113787686B (en) * | 2021-07-28 | 2023-10-17 | 海天塑机集团有限公司 | Two-plate type injection molding machine mold opening method and system for spring mold |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2094217A (en) * | 1981-03-05 | 1982-09-15 | Teledyne Ind | Method and apparatus for action moulding solid steel-banded press-on industrial rubber tyres |
| JP2001341165A (en) * | 2000-05-30 | 2001-12-11 | Sekisui Chem Co Ltd | Mold for injection molding |
| CN101030232A (en) * | 2007-02-05 | 2007-09-05 | 中国建筑第八工程局 | Method for designing and arranging template of arc-curved axis-rotating oval casing structure |
| CN204640700U (en) * | 2015-05-28 | 2015-09-16 | 山东通佳机械有限公司 | Front mould board of injection machine |
| CN108000789A (en) * | 2017-12-29 | 2018-05-08 | 苏州杰锐思自动化设备有限公司 | Turntable clamping |
-
2018
- 2018-11-16 CN CN201811363776.4A patent/CN109382985B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2094217A (en) * | 1981-03-05 | 1982-09-15 | Teledyne Ind | Method and apparatus for action moulding solid steel-banded press-on industrial rubber tyres |
| JP2001341165A (en) * | 2000-05-30 | 2001-12-11 | Sekisui Chem Co Ltd | Mold for injection molding |
| CN101030232A (en) * | 2007-02-05 | 2007-09-05 | 中国建筑第八工程局 | Method for designing and arranging template of arc-curved axis-rotating oval casing structure |
| CN204640700U (en) * | 2015-05-28 | 2015-09-16 | 山东通佳机械有限公司 | Front mould board of injection machine |
| CN108000789A (en) * | 2017-12-29 | 2018-05-08 | 苏州杰锐思自动化设备有限公司 | Turntable clamping |
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| Publication number | Publication date |
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| CN109382985A (en) | 2019-02-26 |
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