CN113071070B - Multi-slider secondary core-pulling mechanism of injection mold - Google Patents
Multi-slider secondary core-pulling mechanism of injection mold Download PDFInfo
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- CN113071070B CN113071070B CN202110364429.9A CN202110364429A CN113071070B CN 113071070 B CN113071070 B CN 113071070B CN 202110364429 A CN202110364429 A CN 202110364429A CN 113071070 B CN113071070 B CN 113071070B
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- slider
- movable mold
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- 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
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- 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
- B29C45/40—Removing or ejecting moulded articles
- B29C45/44—Removing or ejecting moulded articles for undercut articles
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- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention relates to a multi-slider secondary core pulling mechanism of an injection mold, which comprises a movable mold and a fixed mold, wherein the movable mold sequentially comprises an ejector plate, a movable mold pin, a movable mold insert, a second slider and a first slider from bottom to top, the ejector plate is provided with an ejector rod, the top of the ejector rod penetrates through the movable mold pin and the movable mold insert, a first guide chute is formed in the first slider, a second guide chute is formed in the second slider, a third guide chute is formed in the movable mold pin, the fixed mold comprises an inclined guide pillar, and the inclined guide pillar comprises a vertical part and an inclined part positioned below the vertical part. Compared with the prior art, the inclined guide post core pulling device is provided with the first sliding block and the second sliding block, when the inclined guide post core pulling is carried out, the second sliding block is firstly separated from a product, and at the moment, one part of the product reverse buckle is also adhered to the first sliding block, so that the product reverse buckle can be prevented from deforming along with the movement of the second sliding block, the product integrity is ensured, the yield is improved, the production efficiency is improved, and the cost is reduced.
Description
Technical Field
The invention relates to a multi-slider secondary core-pulling mechanism of an injection mold, belonging to the technical field of injection molds.
Background
Many injection molding parts adopt the slider drawing of patterns during the drawing of patterns because its structure is complicated. However, when the contact area between the inverted buckle part of the injection molding part and the sliding block is too large, the inverted buckle is easy to deform due to forced demoulding of the sliding block, the yield is low, the production efficiency is low, and the cost is high.
Disclosure of Invention
The invention aims to provide a multi-slider secondary core-pulling mechanism of an injection mold, which can prevent product back-off deformation and overcomes the defects of the prior art.
The technical scheme adopted by the invention for realizing the purpose is as follows:
injection mold's many sliders secondary mechanism of loosing core, including movable mould and cover half, the movable mould from the bottom up includes thimble board, movable mould foot, movable mould insert, second slider and first slider in proper order, be equipped with the ejector pin on the thimble board, the top of ejector pin is passed movable mould foot with the movable mould inserts, the system has first guide chute in the first slider, the system has the second guide chute in the second slider, the system has the third guide chute in the movable mould foot, the cover half includes oblique guide pillar, oblique guide pillar includes vertical portion and the rake that is located vertical portion below.
As a further optimization of the above technical solution: the bottom of the first sliding block is provided with a sliding block notch, the second sliding block is provided with a clamping block protruding upwards, and the clamping block is positioned in the sliding block notch and can move in the sliding block notch.
As a further optimization of the above technical solution: when the die is closed, the clamping block is positioned at one end of the sliding block notch close to the ejector rod, the vertical part is positioned in the first guide chute, the upper part of the inclined part is positioned in the second guide chute, and the lower part of the inclined part is positioned in the third guide chute.
As a further optimization of the above technical solution: and a clamping block notch is formed in one corner of the clamping block, which is close to the ejector rod, a matching convex block is formed on the sliding block notch, and the matching convex block and the clamping block notch jointly form a part of movable mould cavity capable of being used for injection molding of a product reverse buckle during mould assembly.
As a further optimization of the above technical solution: the groove wall that the first guide chute is close to the outside of the mould is a first groove wall, the groove wall that the first guide chute is close to the inside of the mould is a second groove wall, the first groove wall is obliquely arranged, the inclination angle of the first groove wall is the same as that of the inclined part, a first notch is formed in the top of the first groove wall, the lower part of the second groove wall is vertically arranged, the upper part of the second groove wall is obliquely arranged, and the inclination angle of the upper part of the second groove wall is the same as that of the inclined part.
As a further optimization of the above technical solution: the second guide chute is obliquely arranged, the inclined angle of the second guide chute is the same as that of the inclined part, and a second notch is further formed in the top of the groove wall, close to the outer side of the mold, of the second guide chute.
As a further optimization of the above technical solution: and a positioning block protruding downwards is arranged at the bottom of the second sliding block, a positioning notch is arranged on the movable mould pin, and one side surface of the positioning block is tightly attached to one side wall of the positioning notch during mould assembly.
As a further optimization of the above technical solution: and the movable mould foot is also provided with a limiting lug.
As a further optimization of the above technical solution: the two first sliding blocks are respectively positioned on two sides of the ejector rod, the two second sliding blocks are respectively positioned on two sides of the ejector rod, and when the die is closed, one side face opposite to the two first sliding blocks, one side face opposite to the two second sliding blocks, the part of the ejector rod penetrating through the movable die insert and the upper surface of the movable die insert jointly form a movable die cavity.
As a further optimization of the above technical solution: and cooling water channels are also arranged in the ejector pin plate and the ejector rod.
Compared with the prior art, the injection molding machine is provided with the first sliding block and the second sliding block, the first sliding block and the second sliding block jointly form a part of movable mold cavities capable of injection molding product back-offs, when the inclined guide post looses the core, the second sliding block is firstly separated from the product, and at the moment, part of the product back-offs are also stuck on the first sliding block, so that the product back-offs can be prevented from deforming along with the movement of the second sliding block, the problem that the demoulding is difficult due to the overlarge contact area between the product back-offs and the sliding blocks is solved, the product integrity is ensured, the yield is improved, the production efficiency is improved, and the cost is reduced; and the second sliding block is prevented from moving excessively by arranging a limiting lug, a positioning block and a positioning notch.
Drawings
Fig. 1 is a schematic cross-sectional structure of the present invention.
Detailed Description
The invention is further described with reference to the following figures and detailed description. As shown in fig. 1, the multi-slider secondary core-pulling mechanism of the injection mold comprises a movable mold and a fixed mold, wherein the fixed mold comprises an inclined guide post 6, and the inclined guide post 6 comprises a vertical part and an inclined part 61 positioned below the vertical part. The movable mould from the bottom up includes ejector pin board 1, movable mould footing 9, movable mould insert 2, second slider 5 and first slider 4 in proper order, is equipped with ejector pin 3 on the ejector pin board 1, and movable mould footing 9 and movable mould insert 2 are passed and the system has ejector pin groove 31 in the top of ejector pin 3. In this embodiment, the first slide block 4 and the second slide block 5 are both provided with two blocks, the two first slide blocks 4 are respectively located on two sides of the top rod 3, and the two second slide blocks 5 are also respectively located on two sides of the top rod 3. A first guide chute 42 is formed in the first slide block 4, a chute wall of the first guide chute 42 close to the outer side of the mold is a first chute wall 421, and a chute wall of the first guide chute 42 close to the inner side of the mold is a second chute wall 422. The first groove wall 421 is inclined, the inclination angle of the first groove wall 421 is the same as the inclination angle of the inclined portion 61, and a first notch 423 is formed at the top of the first groove wall 421. The lower portion of the second groove wall 422 is vertically disposed, the upper portion of the second groove wall 422 is obliquely disposed, and the inclination angle of the upper portion of the second groove wall 422 is the same as that of the inclined portion 61. The second slide block 5 is internally provided with a second guide chute 52, the second guide chute 52 is obliquely arranged, the inclination angle of the second guide chute 52 is the same as that of the inclined part 61, and the top of the groove wall of the second guide chute 52 close to the outer side of the mold is also provided with a second notch 53. The third guide chute 91 is arranged in the movable mould foot.
In the above technical scheme: the bottom of the first slider 4 is provided with a slider notch 41, the second slider 5 is provided with a fixture block 51 protruding upwards, and the fixture block 51 is located in the slider notch 41 and can move in the slider notch 41. A fixture block notch 55 is formed in one corner of the fixture block 51 close to the ejector rod 3, a matching projection 43 is formed in the slider notch 41, the fixture block 51 is located at one end of the slider notch 41 close to the ejector rod 3 during mold closing, and the matching projection 43 and the fixture block notch 55 jointly form a part of a movable mold cavity capable of being used for injection molding of a product back-off.
In the above technical scheme: the bottom of the second slide block 5 is provided with a positioning block 54 protruding downwards, the movable mould leg 9 is provided with a positioning notch 92, and one side surface of the positioning block 54 is clung to one side wall of the positioning notch 92 during mould closing. The positioning notch 92 plays a positioning role for the second slide block 5 in the process of the mold, and the second slide block 5 is prevented from moving excessively to damage the mold.
In the above technical scheme: the movable mould foot 9 is also provided with a limiting lug 7, and the limiting lug 7 plays a limiting role in the movement of the second slide block 5 in the separation process of the movable mould and the fixed mould, so that the second slide block 5 is prevented from moving excessively and separating from the movable mould.
In the above technical scheme: and cooling water channels 8 are also arranged in the ejector plate 1 and the ejector rod 3. The cooling water channel 8 is internally communicated with cooling water which has the function of cooling the ejector plate 1 and the ejector rod 3.
During die assembly, the fixture block 51 is positioned at one end of the slide block notch 41 close to the ejector rod 3, the vertical part is positioned in the first guide chute 42 and is tightly attached to the lower part of the second chute wall 422, the upper part of the inclined part 61 is positioned in the second guide chute 52 and is tightly attached to the chute wall of the second guide chute 52, the lower part of the inclined part 61 is positioned in the third guide chute 91, one side surface of the positioning block 54 is tightly attached to one side wall of the positioning notch 92, and the opposite side surfaces of the two first slide blocks 4, the opposite side surfaces of the two second slide blocks 5, the part of the ejector rod 3 penetrating through the movable die insert 2 and the upper surface of the movable die insert 2 jointly form a movable die cavity.
After finishing moulding plastics, the separation of movable cover half, the cover half drives oblique guide pillar 6 and moves upward, because the slope 61 is hugged closely with the cell wall of second guide chute 52, second slider 5 is driven by oblique guide pillar 6 and begins the lapse, second slider 5 breaks away from the product gradually, first slider 4 is motionless this moment, because partly still glue on first slider 4 of product back-off, can prevent that the product back-off from warping along with the removal of second slider 5, the problem of drawing of patterns difficulty because of product back-off and slider area of contact are too big has been solved, guarantee that the product is complete, the yield is improved. In the process, when the fixture block 51 moves to one end of the slide block notch 41 far away from the ejector rod 3 and abuts against the groove wall of the slide block notch 41, the first slide block 4 is driven by the second slide block 5 to move backwards synchronously, and the first slide block 4 is separated from the product gradually. When the second slide block 5 is abutted to the limiting bump 7, the second slide block 5 and the first slide block 4 stop moving, at the moment, the first slide block 4 and the second slide block 5 are both completely separated from a product, and the inclined guide post 6 is completely separated from the movable die. Then the ejector plate 1 drives the ejector rod 3 to eject the product, and the product is demoulded. In the above process, the first notch 423 and the second notch 53 prevent the first slider 4 and the second slider 5 from interfering with the movement of the tilt guide post 6, respectively.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions that can be obtained by those skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should fall within the scope of the present invention.
Claims (6)
1. The multi-slider secondary core pulling mechanism of the injection mold comprises a movable mold and a fixed mold, and is characterized in that the movable mold sequentially comprises an ejector plate (1), a movable mold pin (9), a movable mold insert (2), a second slider (5) and a first slider (4) from bottom to top, the ejector plate (1) is provided with an ejector rod (3), the top of the ejector rod (3) penetrates through the movable mold pin (9) and the movable mold insert (2), a first guide chute (42) is formed in the first slider (4), a second guide chute (52) is formed in the second slider (5), a third guide chute (91) is formed in the movable mold pin (9), the fixed mold comprises an inclined guide pillar (6), and the inclined guide pillar (6) comprises a vertical part and an inclined part (61) located below the vertical part;
the bottom of the first sliding block (4) is provided with a sliding block notch (41), the second sliding block (5) is provided with a clamping block (51) protruding upwards, and the clamping block (51) is positioned in the sliding block notch (41) and can move in the sliding block notch (41);
when the die is closed, the fixture block (51) is positioned at one end of the slider notch (41) close to the ejector rod (3), the vertical part is positioned in the first guide sliding groove (42), the upper part of the inclined part (61) is positioned in the second guide sliding groove (52) and is tightly attached to the groove wall of the second guide sliding groove (52), and the lower part of the inclined part (61) is positioned in the third guide sliding groove (91);
and the movable mould foot (9) is also provided with a limiting lug (7).
2. The multi-slide secondary core-pulling mechanism of the injection mold according to claim 1, characterized in that a corner of the fixture block (51) close to the ejector rod (3) is provided with a fixture block notch (55), the slide block notch (41) is provided with a matching convex block (43), and the matching convex block (43) and the fixture block notch (55) form a part of a movable mold cavity capable of injecting a product back-off during mold closing.
3. The multiple-slide secondary core-pulling mechanism of the injection mold according to claim 1, wherein the groove wall of the first chute (42) close to the outside of the mold is a first groove wall (421), the groove wall of the first chute (42) close to the inside of the mold is a second groove wall (422), the first groove wall (421) is obliquely arranged, the inclination angle of the first groove wall (421) is the same as the inclination angle of the inclined portion (61), the top of the first groove wall (421) is provided with a first notch (423), the lower part of the second groove wall (422) is vertically arranged, the upper part of the second groove wall (422) is obliquely arranged, and the inclination angle of the upper part of the second groove wall (422) is the same as the inclination angle of the inclined portion (61);
the second guide sliding groove (52) is obliquely arranged, the oblique angle of the second guide sliding groove (52) is the same as that of the oblique part (61), and a second notch (53) is further formed in the top of the groove wall, close to the outer side of the mold, of the second guide sliding groove (52).
4. The multi-slider secondary core-pulling mechanism of the injection mold according to claim 1, wherein the bottom of the second slider (5) is provided with a positioning block (54) protruding downwards, the movable mold leg (9) is provided with a positioning notch (92), and one side surface of the positioning block (54) is tightly attached to one side wall of the positioning notch (92) during mold closing.
5. The multi-slider secondary core pulling mechanism of the injection mold according to claim 1, wherein the first slider (4) and the second slider (5) are provided with two blocks, the two blocks of the first slider (4) are respectively located at two sides of the ejector rod (3), the two blocks of the second slider (5) are also respectively located at two sides of the ejector rod (3), and when the mold is closed, one side surface of the two blocks of the first slider (4) opposite to each other, one side surface of the two blocks of the second slider (5) opposite to each other, a part of the ejector rod (3) penetrating through the movable mold insert (2) and the upper surface of the movable mold insert (2) jointly form a movable mold cavity.
6. The multi-slider secondary core-pulling mechanism of the injection mold according to claim 1, characterized in that the ejector plate (1) and the ejector rod (3) are provided with cooling water channels (8) inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110364429.9A CN113071070B (en) | 2021-04-05 | 2021-04-05 | Multi-slider secondary core-pulling mechanism of injection mold |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110364429.9A CN113071070B (en) | 2021-04-05 | 2021-04-05 | Multi-slider secondary core-pulling mechanism of injection mold |
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| CN113071070A CN113071070A (en) | 2021-07-06 |
| CN113071070B true CN113071070B (en) | 2022-06-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR200421065Y1 (en) * | 2006-04-07 | 2006-07-10 | 구미에이테크솔루션주식회사 | Boss undercut processing structure |
| JP2013163352A (en) * | 2012-02-13 | 2013-08-22 | Nec Infrontia Corp | Resin molding mold, resin molding method and resin molding |
| CN109262987A (en) * | 2018-07-31 | 2019-01-25 | 宝利根(成都)精密模塑有限公司 | A kind of two-way de- back-off core-pulling mechanism of slipper block loose core and its control method |
| CN109551726A (en) * | 2018-11-13 | 2019-04-02 | 浙江工商职业技术学院 | Oblique slot type impeller core-drawing demoulding mechanism three times |
| CN209454086U (en) * | 2018-12-29 | 2019-10-01 | 上海稳羿科技有限公司 | Miniature injection mold in slipper block loose core |
| CN212707804U (en) * | 2020-08-14 | 2021-03-16 | 苏州晨旭生物科技有限公司 | Core pulling device for demoulding of injection mold |
| CN215151435U (en) * | 2021-04-05 | 2021-12-14 | 浙江台州美多模具有限公司 | Multi-slider secondary core-pulling mechanism of injection mold |
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