CN215151436U - Secondary ejection mechanism of injection mold - Google Patents
Secondary ejection mechanism of injection mold Download PDFInfo
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- CN215151436U CN215151436U CN202120688127.2U CN202120688127U CN215151436U CN 215151436 U CN215151436 U CN 215151436U CN 202120688127 U CN202120688127 U CN 202120688127U CN 215151436 U CN215151436 U CN 215151436U
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- ejector
- ejector pin
- ejection
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Abstract
The utility model relates to an injection mold's secondary ejection mechanism, including the movable mould, the movable mould from the top down includes thimble, stripper plate, movable mould insert, thimble stop collar, the ejecting push pedal of thimble, ejecting spring and movable mould bottom plate in proper order, ejecting spring's one end with the movable mould bottom plate is inconsistent, the other end with the ejecting push pedal of thimble is inconsistent. Compared with the prior art, the utility model realizes secondary ejection by arranging the ejector pin and the stripper plate, prevents the back-off from sticking the ejector pin and the movable mould insert, leads the product to be smoothly demoulded, prevents the product from deforming, improves the yield and the production efficiency, and reduces the cost; in addition, the two ejection processes are provided with limiting structures, so that excessive ejection is prevented, and the whole ejection process is more stable and reliable; the utility model discloses well movable mould is inserted, thimble and thimble stop collar all is provided with four, can once only mould plastics four group's products during the compound die, has improved production efficiency greatly.
Description
Technical Field
The utility model relates to an injection mold's secondary ejection mechanism belongs to injection mold technical field.
Background
In order to avoid the exposed screws from affecting the appearance of the product, screw covers are usually used to shield the exposed screws. The inner side of the screw cover is provided with a back-off for clamping the screw, and the back-off demoulding process can only adopt a forced demoulding mode. However, the forced demoulding in the prior art easily causes the back-off deformation of the inner side of the screw cover, so that the screw cover cannot be used, the yield is low, and the cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the shortcoming of prior art, provide a secondary ejection mechanism of injection mold who warp when preventing the drawing of patterns of screw lid.
For realizing the purpose the utility model adopts the technical proposal that:
the secondary ejection mechanism of the injection mold comprises a movable mold, wherein the movable mold sequentially comprises an ejector pin, an ejector plate, a movable mold insert, an ejector pin limiting sleeve, an ejector pin ejection push plate, an ejection spring and a movable mold bottom plate from top to bottom, one end of the ejection spring is abutted to the movable mold bottom plate, and the other end of the ejection spring is abutted to the ejector pin ejection push plate.
As a further optimization of the above technical solution: the movable mould insert is fixed in the movable mould, an insert hole is formed in the push plate, the upper portion of the movable mould insert is located in the insert hole, a thimble hole is formed in the movable mould insert, the bottom of the thimble is fixed in the thimble limiting sleeve, the top of the thimble penetrates through the thimble hole, the thimble can move up and down in the thimble hole, the ejection spring is compressed during mould assembly, the bottom of the thimble limiting sleeve is tightly attached to the upper surface of the ejector ejection push plate of the thimble, and the top of the thimble is tightly attached to the top of the movable mould insert and the upper surface of the push plate to jointly form a movable mould cavity.
As a further optimization of the above technical solution: the movable mold also comprises a backing plate and a pushing bottom plate, the pushing bottom plate is positioned above the ejector pin ejection push plate, a push piece plate ejector rod is arranged on the push piece bottom plate, the top of the push piece plate ejector rod is arranged on the push piece plate, the pushing piece bottom plate drives the pushing piece plate to move upwards through the pushing piece plate ejector rod, a pushing piece limiting hole penetrates through the pushing piece bottom plate, the thimble limit sleeve passes through the push piece limit hole, the middle part of the push piece limit hole is provided with limit grooves protruding towards two sides, the thimble spacing sleeve is provided with a spacing lug which protrudes towards two sides and is positioned in the spacing groove, the base plate is fixed in the movable mould, the thimble penetrates through the base plate, the base plate is positioned above the thimble limit sleeve during mould closing, the upper groove wall of the limiting groove is tightly attached to the upper surface of the limiting lug, and the lower groove wall of the limiting groove is located below the lower surface of the limiting lug.
As a further optimization of the above technical solution: when the die is closed, the base plate is positioned 2mm above the thimble limiting sleeve, and the lower groove wall of the limiting groove is positioned 8mm below the lower surface of the limiting lug.
As a further optimization of the above technical solution: the ejector pin ejection push plate is internally provided with a plurality of screw cap grooves, the groove bottoms of the screw cap grooves are provided with screw mounting holes, the rod parts of fixing screws penetrate through the screw mounting holes and then are fixed on the movable die bottom plate, after the fixing screws are mounted, the lower surfaces of the fixing screw cap heads are positioned above the groove bottoms of the screw cap grooves in a die assembly state, and the distance between the lower surfaces of the fixing screw cap heads and the groove bottoms of the screw cap grooves is larger than 2 mm.
As a further optimization of the above technical solution: the distance between the lower surface of the head of the fixing screw and the bottom of the groove of the head of the fixing screw is 3 mm.
As a further optimization of the above technical solution: the ejector pin limiting sleeve comprises a first limiting sleeve and a second limiting sleeve positioned at the bottom of the first limiting sleeve.
As a further optimization of the above technical solution: the movable mould insert, the ejector pin and the ejector pin limiting sleeve are all provided with four.
Compared with the prior art, the utility model realizes secondary ejection by arranging the ejector pin and the stripper plate, prevents the back-off from sticking the ejector pin and the movable mould insert, leads the product to be smoothly demoulded, prevents the product from deforming, improves the yield and the production efficiency, and reduces the cost; in addition, the two ejection processes are provided with limiting structures, so that excessive ejection is prevented, and the whole ejection process is more stable and reliable; the utility model discloses well movable mould is inserted, thimble and thimble stop collar all is provided with four, can once only mould plastics four group's products during the compound die, has improved production efficiency greatly.
Drawings
Fig. 1 is a schematic sectional structure of the present invention.
Fig. 2 is a schematic view of another angle of the cross-sectional structure of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the following detailed description. As shown in fig. 1-2, the secondary ejection mechanism of the injection mold comprises a movable mold, the movable mold further comprises a plurality of ejector pins 5, an ejector plate 7, a plurality of movable mold inserts 8, a base plate 6, a plurality of ejector pin limit sleeves 4, an ejector base plate 9, an ejector pin ejection push plate 3, a plurality of ejection springs 2 and a movable mold base plate 1 from top to bottom in sequence, one end of each ejection spring 2 is abutted to the movable mold base plate 1, and the other end of each ejection spring is abutted to the ejector pin ejection push plate 3. The ejection springs 2 are provided in three in this embodiment. The ejector plate ejector rod 11 is installed on the ejector plate bottom plate 9, the top of the ejector plate ejector rod 11 is installed on the ejector plate 7, and the ejector plate bottom plate 9 drives the ejector plate 7 to move upwards through the ejector plate ejector rod 11. A pushing piece limiting hole penetrates through the pushing piece bottom plate 9, and the ejector pin limiting sleeve 4 penetrates through the pushing piece limiting hole. The middle part of the pushing piece limiting hole is provided with a limiting groove 91 protruding towards two sides, the thimble limiting sleeve 4 is provided with a limiting lug 41 protruding towards two sides, and the limiting lug 41 is positioned in the limiting groove 91. When the die is closed, the ejection spring 2 is compressed, the bottom of the thimble limiting sleeve 4 is clung to the upper surface of the thimble ejection push plate 3, the cushion plate 6 is positioned 2mm above the thimble limiting sleeve 4, the upper groove wall of the limiting groove 91 is clung to the upper surface of the limiting lug 41, and the lower groove wall of the limiting groove 91 is positioned 8mm below the lower surface of the limiting lug 41. The utility model discloses not only be applicable to the drawing of patterns of screw lid, also be applicable to the drawing of patterns of other back-off products. The distance of 2mm between the base plate 6 and the thimble stop collar 4 limits the ejection distance between the thimble stop collar 4 and the thimble 5 to be 2mm, so that the thimble 5 can be ensured to eject a product for a certain distance, the product is separated from the movable mould insert 8, and the phenomenon that the ejection stroke of the thimble 5 is too long to influence the secondary ejection process of the subsequent ejector plate 7 can be prevented.
In the above technical scheme: the movable mold bottom plate 1 is provided with a bottom plate groove 101, the groove bottom of the bottom plate groove 101 is provided with a first spring groove 102, the bottom of the ejector pin ejection push plate 3 is provided with a second spring groove 103 corresponding to the first spring groove 102, one end of the ejection spring 2 is abutted against the groove bottom of the first spring groove 102, and the other end of the ejection spring is abutted against the groove bottom of the second spring groove 103. When the die is closed, the bottom of the ejector pin ejection push plate 3 is tightly attached to the bottom of the bottom plate groove 101. In this embodiment, three first spring grooves 102 and three second spring grooves 103 are provided.
In the above technical scheme: the base plate 6 and the movable mould insert 8 are fixed in the movable mould, an insert hole is formed in the push plate 7, and the upper part of the movable mould insert 8 is positioned in the insert hole. Both the base plate 6 and the movable mould insert 8 are provided with thimble holes, the bottom of the thimble 5 is fixed in the thimble limiting sleeve 4, the top of the thimble 5 passes through the thimble holes, and the thimble 5 can move up and down in the thimble holes. And when the die is closed, the top of the ejector pin 5, the top of the movable die insert 8 and the upper surface of the ejector plate 7 form a movable die cavity together. In the embodiment, the movable die insert 8, the ejector pins 5 and the ejector pin limiting sleeve 4 are all provided with four parts, four groups of products can be molded at one time during die assembly, and the production efficiency is greatly improved.
In the above technical scheme: a plurality of screw cap grooves 31 are formed in the ejector pin ejection push plate 3, screw mounting holes are formed in the bottoms of the screw cap grooves 31, the rod portions of the fixing screws 10 penetrate through the screw mounting holes and then are fixed on the movable die bottom plate 1, after the fixing screws 10 are mounted, the lower surfaces of the fixing screws 10 in the die assembly state are located above the bottoms of the screw cap grooves 31, the distance between the lower surfaces of the fixing screws 10 and the bottoms of the screw cap grooves 31 is larger than 2mm, space is provided for releasing the ejector pin springs 2, and the ejector pins 5 can be fully ejected. In this embodiment, the distance between the lower surface of the head of the fixing screw 10 and the bottom of the groove 31 of the head of the screw is 3mm, which can ensure that the thimble 5 can be fully ejected, and prevent the thimble 5 from being excessively ejected when the limit of the cushion plate 6 to the thimble limit sleeve 4 fails. In the present embodiment, two screw head grooves 31 and two fixing screws 10 are provided.
In the above technical scheme: the ejector pin limiting sleeve 4 comprises a first limiting sleeve and a second limiting sleeve positioned at the bottom of the first limiting sleeve.
The utility model discloses an operating process is as follows, during the compound die, ejecting spring 2 is in compression state, the last cell wall of spacing groove 91 in the stripper bottom plate 9 is hugged closely with the upper surface of spacing lug 41 on the thimble stop collar 4, the lower cell wall of spacing groove 91 is located the below 8mm department of spacing lug 41 lower surface, backing plate 6 is located the top 2mm department of thimble stop collar 4, the lower surface of set screw 10 cap is located 31 tank bottom top 3mm departments of screw cap groove, 8's top is inserted with the movable mould at the top of thimble 5, the upper surface of stripper plate 7 constitutes the movable mould die cavity jointly.
After injection molding is finished, the movable mold and the fixed mold are separated, a primary ejection process is started, the ejector bottom plate 9 drives the ejector plate 7 to move upwards through the ejector rod 11 of the ejector plate, and the ejector plate 7 drives a product to move upwards; in the process, the elasticity of the ejection spring 2 is gradually released, and the ejector pin ejection push plate 3 drives the ejector pin limiting sleeve 4 and the ejector pin 5 to move upwards. Because the ejection spring 2 can obtain the expansion space only after the ejector bottom plate 9 moves upwards, the elasticity is released to drive the ejector pin 5 to move upwards, the ejector plate 7 moves upwards in a rigid manner, and the ejection spring 2 drives the ejector pin 5 to move upwards in an elastic manner, the ejection process of the ejector pin 5 always lags behind the ejection process of the ejector plate 7. In the primary ejection process, the part adhered between the ejector pin 5 and the product is gradually loosened, so that the phenomenon that the product is reversely buckled and adhered on the ejector pin 5 to cause product deformation when the subsequent secondary ejection forced demolding is prevented. When the top surface of the thimble limiting sleeve 4 is abutted against the lower surface of the base plate 6, the ejector pin 5 is ejected completely, the ejection distance between the ejector plate 7 and the ejector pin 5 is 2mm, and the ejector pin 5 and the ejector plate 7 eject a product so that the product is separated from the movable die insert 8.
The pushing plate 7 continues to drive the product to move upwards for secondary ejection, so that the product is forced to be separated from the thimble 5 until the lower surface of the limiting bump 41 is tightly attached to the lower groove wall of the limiting groove 91, the pushing bottom plate 9 and the pushing plate 7 stop moving, and the product is completely demoulded. In the secondary ejection process, the ejector plate 7 is ejected by 8mm, namely the total ejection distance of the ejector plate 7 is 10 mm. The limiting lug 41 and the limiting groove 91 are matched to limit the ejection process of the stripper bottom plate 9 and the stripper plate 7, so that excessive ejection of the stripper bottom plate 9 and the stripper plate 7 is prevented.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, all should fall into the protection scope of the utility model, the technical scheme that the design of this technical field technical personnel according to the utility model can be obtained through logic analysis, reasoning or limited experiment on prior art's basis, all should fall into.
Claims (7)
1. The secondary ejection mechanism of the injection mold comprises a movable mold and is characterized in that the movable mold sequentially comprises an ejector pin (5), a stripper plate (7), a movable mold insert (8), an ejector pin limiting sleeve (4), an ejector pin ejection push plate (3), an ejection spring (2) and a movable mold bottom plate (1) from top to bottom, one end of the ejection spring (2) is abutted against the movable mold bottom plate (1), and the other end of the ejection spring is abutted against the ejector pin ejection push plate (3);
the movable mould insert (8) is fixed in the movable mould, an insert hole is formed in the ejector plate (7), the upper portion of the movable mould insert (8) is located in the insert hole, an ejector pin hole is formed in the movable mould insert (8), the bottom of the ejector pin (5) is fixed in the ejector pin limiting sleeve (4), the top of the ejector pin (5) penetrates through the ejector pin hole, the ejector pin (5) can move up and down in the ejector pin hole, the ejection spring (2) is compressed during mould closing, the bottom of the ejector pin limiting sleeve (4) is tightly attached to the upper surface of the ejector pin ejection push plate (3), and the top of the ejector pin (5) is closely attached to the top of the movable mould insert (8) and the upper surface of the ejector plate (7) jointly form a movable mould cavity.
2. The secondary ejection mechanism of the injection mold according to claim 1, wherein the movable mold further comprises a backing plate (6) and a pusher base plate (9), the pusher base plate (9) is located above the ejector pin ejection push plate (3), a pusher plate ejector rod (11) is mounted on the pusher base plate (9), the top of the pusher plate ejector rod (11) is mounted on the pusher plate (7), the pusher base plate (9) drives the pusher plate (7) to move upwards through the pusher plate ejector rod (11), a pusher limiting hole is formed in the pusher base plate (9) in a penetrating manner, the ejector limiting sleeve (4) penetrates through the pusher limiting hole, a limiting groove (91) protruding towards two sides is formed in the middle of the pusher limiting hole, a limiting lug (41) protruding towards two sides is formed on the ejector limiting sleeve (4), and the limiting lug (41) is located in the limiting groove (91), backing plate (6) are fixed in the movable mould, thimble (5) pass backing plate (6), during the compound die backing plate (6) are located the top of thimble stop collar (4), the last cell wall of spacing groove (91) with the upper surface of spacing lug (41) is hugged closely, the lower cell wall of spacing groove (91) is located the below of spacing lug (41) lower surface.
3. The secondary ejection mechanism of an injection mold according to claim 2, wherein when the mold is closed, the pad plate (6) is located 2mm above the ejector pin stop collar (4), and the lower groove wall of the stop groove (91) is located 8mm below the lower surface of the stop lug (41).
4. The secondary ejection mechanism of the injection mold according to claim 3, characterized in that the ejector pin ejection push plate (3) is provided with a plurality of screw cap grooves (31), the bottom of the screw cap grooves (31) is provided with screw mounting holes, the rod of the fixing screw (10) passes through the screw mounting holes and then is fixed on the movable mold base plate (1), after the fixing screw (10) is mounted, the lower surface of the cap of the fixing screw (10) is located above the bottom of the screw cap grooves (31) in a mold closing state, and the distance between the lower surface of the cap of the fixing screw (10) and the bottom of the screw cap grooves (31) is greater than 2 mm.
5. The secondary ejection mechanism of an injection mold according to claim 4, characterized in that the distance between the lower surface of the head of the fixing screw (10) and the bottom of the groove of the head of the screw (31) is 3 mm.
6. The secondary ejection mechanism of an injection mold according to claim 2, wherein the ejector base plate (9) comprises a first ejector base plate and a second ejector base plate located at the bottom of the first ejector base plate, and the ejector retainer sleeve (4) comprises a first retainer sleeve and a second retainer sleeve located at the bottom of the first retainer sleeve.
7. The secondary ejection mechanism of the injection mold according to claim 1, wherein four movable mold inserts (8), four ejector pins (5) and four ejector pin limit sleeves (4) are provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120688127.2U CN215151436U (en) | 2021-04-05 | 2021-04-05 | Secondary ejection mechanism of injection mold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120688127.2U CN215151436U (en) | 2021-04-05 | 2021-04-05 | Secondary ejection mechanism of injection mold |
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| Publication Number | Publication Date |
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| CN215151436U true CN215151436U (en) | 2021-12-14 |
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| CN202120688127.2U Active CN215151436U (en) | 2021-04-05 | 2021-04-05 | Secondary ejection mechanism of injection mold |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113071075A (en) * | 2021-04-05 | 2021-07-06 | 浙江台州美多模具有限公司 | Secondary ejection mechanism of injection mold |
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- 2021-04-05 CN CN202120688127.2U patent/CN215151436U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113071075A (en) * | 2021-04-05 | 2021-07-06 | 浙江台州美多模具有限公司 | Secondary ejection mechanism of injection mold |
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