CN109676872A - The core pulling oil cylinder self-locking mechanism of injection mold - Google Patents
The core pulling oil cylinder self-locking mechanism of injection mold Download PDFInfo
- Publication number
- CN109676872A CN109676872A CN201910017205.3A CN201910017205A CN109676872A CN 109676872 A CN109676872 A CN 109676872A CN 201910017205 A CN201910017205 A CN 201910017205A CN 109676872 A CN109676872 A CN 109676872A
- Authority
- CN
- China
- Prior art keywords
- oil cylinder
- guide pad
- core pulling
- core
- boss
- 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.)
- Granted
Links
- 238000002347 injection Methods 0.000 title claims abstract description 15
- 239000007924 injection Substances 0.000 title claims abstract description 15
- 230000007246 mechanism Effects 0.000 title claims abstract description 11
- 238000001746 injection moulding Methods 0.000 abstract description 12
- 239000011888 foil Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 101100042630 Caenorhabditis elegans sin-3 gene Proteins 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
- B29C45/26—Moulds
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
- B29C45/332—Mountings or guides therefor; Drives therefor
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention relates to a kind of core pulling oil cylinder self-locking mechanisms of injection mold, including oil cylinder, oil cylinder guide pad, core pulling guide pad, Loose core block, the piston rod of the oil cylinder protrudes into fixed in the oil cylinder guide pad, the upper surface bevel of the Loose core block, lower surface is formed with the inserts for making formed product, the core pulling guide pad inclination is fixed on the upper surface of the Loose core block, there are two boss for the upper surface system of the core pulling guide pad, slope is made in the left side of each boss, the tilt angle on the slope is less than the tilt angle of the core pulling guide pad, the lower surface of the oil cylinder guide pad and the upper surface of the core pulling guide pad fit.Compared with prior art, product is to the principle of the active force of oil cylinder when the present invention reduces draft angle using setting boss to reduce injection molding, is also able to achieve self-locking so that reducing the core pulling oil cylinder after cylinder diameter, substantially reduces die cost, save mold occupied space.
Description
Technical field
The present invention relates to the core pulling oil cylinder self-locking mechanisms of injection mold, belong to injection mold technology.
Background technique
Core pulling oil cylinder is one of most common mechanism in mold, when needing to design dark pulling mechanism on general mold, there are two
Scheme is available: 1, cover half floating core pulling, realizes mold mode locking using locking force of injection machine；2, cover half oil cylinder is secretly taken out, oil cylinder
Cylinder diameter needs are calculated by formula.Regardless of selecting which kind of conceptual design, only guaranteeing oil cylinder to the thrust of Loose core block greater than injection molding
When product to cylinder force in the case where to be just able to achieve oil cylinder self-locking.And when injection pressure is big, product is to oil cylinder when injection molding
Active force it is naturally just big, oil cylinder be realize it is self-locking, it is desirable that cylinder thrust it is naturally just big.In the prior art, increase oil cylinder to push away
The method of power is typically all to increase oil cylinder cylinder diameter, but the high cost of oil cylinder of large-diameter, account for area.
Summary of the invention
The purpose of the invention is to overcome prior art, provide also be able to achieve after a kind of reduction cylinder diameter it is self-locking
The core pulling oil cylinder self-locking mechanism of injection mold.
For realize purpose the technical solution adopted by the present invention is that:
The core pulling oil cylinder self-locking mechanism of injection mold, including oil cylinder, oil cylinder guide pad, core pulling guide pad, Loose core block, it is described
The piston rod of oil cylinder is protruded into the oil cylinder guide pad and is fixed, and the upper surface bevel of the Loose core block, lower surface, which is formed with, to be made
The inserts of formed product, core pulling guide pad inclination are fixed on the upper surface of the Loose core block, the core pulling guide pad it is upper
For surface system there are two boss, slope is made in the left side of each boss, and the tilt angle on the slope is less than the core pulling
The tilt angle of guide pad, the lower surface of the oil cylinder guide pad and the upper surface of the core pulling guide pad fit.
Advanced optimize as to above-mentioned technical proposal: the upper surface of the Loose core block is also formed with groove, the core pulling
Guide pad is fixed in the groove.
Compared with prior art, product is to oil cylinder when the present invention reduces draft angle using setting boss to reduce injection molding
Active force principle be also able to achieve self-locking so that reducing the core pulling oil cylinder after cylinder diameter, substantially reduce die cost, save mold
Occupied space.
Detailed description of the invention
Fig. 1 is the schematic diagram of the section structure when oil cylinder of the present invention is self-locking.
Fig. 2 is the schematic diagram of the section structure during core pulling of the present invention.
Fig. 3 is the schematic diagram of the section structure after core pulling of the present invention.
Fig. 4 is force analysis figure when oil cylinder of the present invention is self-locking.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and specific embodiments.As shown in Figs 1-4, injection mold
Core pulling oil cylinder self-locking mechanism, including oil cylinder 1, oil cylinder guide pad 2, core pulling guide pad 3, Loose core block 4, the piston rod of the oil cylinder 1
It protrudes into the oil cylinder guide pad 2 and fixes, the upper surface bevel of the Loose core block 4, lower surface, which is formed with, makes formed product
Inserts 41, the core pulling guide pad 3 tilt the upper surface for being fixed on the Loose core block 4, the upper surface system of the core pulling guide pad 3
There are two boss 31, slope 311 is made in the left side of each boss 31, and the tilt angle on the slope 311 is less than described
The tilt angle of core pulling guide pad 3, the lower surface of the oil cylinder guide pad 2 and the upper surface of the core pulling guide pad 3 fit,
It is formed with I-shaped block in the lower part of oil cylinder guide pad 2, I-shaped slot is formed in core pulling guide pad 3, I-shaped slot makes with the cooperation of I-shaped block
It obtains oil cylinder guide pad 2 and core pulling guide pad 3 can opposite sliding, specific structure and the slide guide in application number 2017113975164
Block is similar with guide runner.As shown in Figure 1, the tilt angle on slope 311 is ∠ α, ∠ α, that is, draft angle, core pulling guide pad 3 inclines
Rake angle is ∠ β.In embodiment, α=3 ° ∠, β=10 ° ∠.
In above-mentioned technical proposal: the upper surface of the Loose core block 4 is also formed with groove, and the core pulling guide pad 3 is fixed on institute
It states in groove.
The power that Fig. 4 is generated when self-locking to oil cylinder of the present invention is analyzed, as shown in figure 4, F1For injection pressure, in core pulling
The directed force F in direction2 injection moldings=F1/cosβ；F3Directed force F for cylinder thrust, in core pulling direction2 oil cylinders=F3/sinα.In order to guarantee
F2 oil cylinders≥F2 injection moldings, so F3/sinα≥F1/ cos β, so F3≥F1×sinα/cosβ.Work as F3=F1When × sin α/cos β, just
Realize self-locking, cylinder thrust and product is to balance between two forces between the active force of oil cylinder when injection molding at this time, that is, product is to oil when being molded
The directed force F of cylinder4=F1×sinα/cosβ.Cylinder thrust is specifically by FOil cylinder=P × S is acquired, and works as FOil cylinder≥F4When, oil cylinder is realized certainly
Lock.
When injection pressure becomes larger, we, can only be by adjusting the big of α or β in the case where oil cylinder cylinder diameter can not increase
It is small to reduce F4Power, it is ensured that oil cylinder can be self-locking.Oil cylinder cylinder diameter is 50mm in embodiment, and product cross section product is in core pulling
5377mm2, injection molding pressure is 30Mpa, oil cylinder pressure 7Mpa, under the premise of not considering frictional force, when on core pulling guide pad 3
When there is no boss 31, i.e., when α=10 °, β=10 °, directed force F of the product to oil cylinder when injection molding4=F1× sin10/cos10=
30 × 5377 × 0.17/0.98=27982, FOil cylinder=P × S=7Mpa × π × (D/2)2=7 × π × (50/2)2=13750,
FOil cylinder< F4, it is not able to satisfy self-locking；And system is there are two boss 31 on core pulling guide pad 3 in embodiment, α=3 °, β=10 °, F at this time4
=F1× sin3/cos10=30 × 5377 × 0.05/0.98=8230, FOil cylinder> F4, realize self-locking.Calculated result demonstrates this
The practicability and reliability of invention.
The course of work of the invention is as follows, since the thrust of oil cylinder 1 is greater than product to the active force of oil cylinder 1, oil when injection molding
Cylinder 1 is realized self-locking.The I-shaped block of 2 lower part of oil cylinder guide pad and the I-shaped slot cooperation in core pulling guide pad 3 are adjacent to 4 jail of Loose core block
Jail is lockked, and is prevented Loose core block 4 from shifting in injection moulding process, is influenced formed product.After injection molding, injection pressure disappears, oil cylinder 1
Start to act, oil cylinder 1 drives oil cylinder guide pad 2 to turn right movement by piston rod, due to oil cylinder guide pad 2 and core pulling guide pad 3
Between for I-shaped block, I-shaped slot cooperate, while oil cylinder guide pad 2 moves to right, core pulling guide pad 3 is reacted with Loose core block 4
Power, which drives, to be moved up, so that inserts 41 is slowly detached from product.Effect when oil cylinder guide pad 2 encounters boss 31, on slope 311
Lower oil cylinder guide pad 2 continues to move to right, and until inserts 41 completely disengages product, core pulling is finished.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution should all be fallen within the scope of protection of the present invention.
Claims (2)
1. the core pulling oil cylinder self-locking mechanism of injection mold, it is characterised in that including oil cylinder (1), oil cylinder guide pad (2), core pulling guiding
Block (3), Loose core block (4), the piston rod of the oil cylinder (1) protrude into fixed in the oil cylinder guide pad (2), the Loose core block (4)
Upper surface bevel, lower surface is formed with the inserts (41) for making formed product, and core pulling guide pad (3) inclination is fixed on institute
The upper surface of Loose core block (4) is stated, there are two boss (31), each boss for the upper surface system of the core pulling guide pad (3)
(31) left side is made slope (311), and the tilt angle of the slope (311) is less than the inclination of the core pulling guide pad (3)
Angle, the lower surface of the oil cylinder guide pad (2) and the upper surface of the core pulling guide pad (3) fit.
2. the core pulling oil cylinder self-locking mechanism of injection mold according to claim 1, it is characterised in that the Loose core block (4)
Upper surface is also formed with groove, and the core pulling guide pad (3) is fixed in the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910017205.3A CN109676872B (en) | 2019-01-08 | 2019-01-08 | Core-pulling oil cylinder self-locking mechanism of injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910017205.3A CN109676872B (en) | 2019-01-08 | 2019-01-08 | Core-pulling oil cylinder self-locking mechanism of injection mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109676872A true CN109676872A (en) | 2019-04-26 |
| CN109676872B CN109676872B (en) | 2024-05-31 |
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ID=66192083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910017205.3A Active CN109676872B (en) | 2019-01-08 | 2019-01-08 | Core-pulling oil cylinder self-locking mechanism of injection mold |
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| Country | Link |
|---|---|
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103753780A (en) * | 2014-01-23 | 2014-04-30 | 宁海胜利模具有限公司 | Self-locking variable direction core-pulling device for injection mold |
| CN203973960U (en) * | 2014-06-16 | 2014-12-03 | 宁波长华汽车装饰件有限公司 | A kind of sliding block core-pulling mechanism of the injection mold with self-locking structure |
| CN206690482U (en) * | 2017-03-31 | 2017-12-01 | 青岛华涛汽车模具有限公司 | A kind of front mold slide rollback system of anti-injection mold |
| CN209466608U (en) * | 2019-01-08 | 2019-10-08 | 浙江台州美多模具有限公司 | The core pulling oil cylinder self-locking mechanism of injection mold |
-
2019
- 2019-01-08 CN CN201910017205.3A patent/CN109676872B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103753780A (en) * | 2014-01-23 | 2014-04-30 | 宁海胜利模具有限公司 | Self-locking variable direction core-pulling device for injection mold |
| CN203973960U (en) * | 2014-06-16 | 2014-12-03 | 宁波长华汽车装饰件有限公司 | A kind of sliding block core-pulling mechanism of the injection mold with self-locking structure |
| CN206690482U (en) * | 2017-03-31 | 2017-12-01 | 青岛华涛汽车模具有限公司 | A kind of front mold slide rollback system of anti-injection mold |
| CN209466608U (en) * | 2019-01-08 | 2019-10-08 | 浙江台州美多模具有限公司 | The core pulling oil cylinder self-locking mechanism of injection mold |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109676872B (en) | 2024-05-31 |
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