CN215969822U - A ejection mechanism and plastic mold for plastic mold - Google Patents
A ejection mechanism and plastic mold for plastic mold Download PDFInfo
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- CN215969822U CN215969822U CN202121737079.8U CN202121737079U CN215969822U CN 215969822 U CN215969822 U CN 215969822U CN 202121737079 U CN202121737079 U CN 202121737079U CN 215969822 U CN215969822 U CN 215969822U
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- ejection mechanism
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- ejector pin
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Abstract
The utility model relates to the technical field of plastic molds, and provides an ejection mechanism for a plastic mold and the plastic mold, which comprises: the fixed die plate is provided with a die core plate, the upper surface of the die core plate is provided with a runner, two ends of the runner along the length direction of the runner are provided with cavities, and the runner is communicated with the cavities; the primary ejection mechanism is movably arranged in the middle of the die core plate and is provided with a first ejection rod; the secondary ejection mechanism is movably arranged at the bottom of the cavity and is provided with a second ejector pin rod; and the ejector pin push plate is arranged below the fixed die plate. Compared with the prior art, the first ejection mechanism is arranged in the middle of the die core plate, so that the stub bar can be separated from a product and pushed out of the fixed die plate, and the problem that the product is ejected out due to latent feeding and the rubber head on the runner is clamped in the die and cannot be taken out is solved.
Description
Technical Field
The utility model relates to the technical field of plastic molds, in particular to an ejection mechanism for a plastic mold and the plastic mold.
Background
The ejection mode of one set of injection mold can be divided into: the ejection device comprises a round top needle ejection device, a supported thimble ejection device, a flat thimble ejection device, a cylinder ejector needle ejection device, a straight ejection device (block) ejection device, an inclined ejection device (block) ejection device, a push plate ejection device, a gas ejection device, an oil cylinder ejection device and the like. The form of ejection also determines the product, the tooling, design ease of the set of molds, and the precision of the plastic product.
The glue feeding mode of the plastic mold is generally divided into a disc-shaped gate, a fan-shaped gate, an annular gate, a spot gate, a side gate and a submarine glue feeding mode, wherein the submarine gate is also called a tunnel gate and is evolved from the spot gate, and the submarine gate overcomes the defect of complex spot gate mold and keeps the advantage of the spot gate. The submarine gate can be arranged on one side of the movable mould and can also be arranged on one side of the fixed mould; the hidden glue injection device can be arranged at the hidden position of the inner surface or the side surface of a plastic part, can also be arranged on a rib or a column of the plastic part, and can also be arranged on a parting surface, and a pouring gate is arranged by utilizing an ejector rod of a mould.
SUMMERY OF THE UTILITY MODEL
The utility model provides an ejection mechanism for a plastic mold and the plastic mold, aiming at the current situation of the prior art.
The technical scheme adopted by the utility model for solving the technical problems is as follows: an ejection mechanism for a plastic mold is provided comprising:
the die comprises a fixed die plate, a die core plate and a runner, wherein the die core plate is detachably arranged on the fixed die plate, the upper surface of the die core plate is provided with the runner, two ends of the runner in the length direction are respectively provided with a cavity, and the runner is communicated with the cavities;
the primary ejection mechanism is movably arranged in the middle of the die core plate and is positioned right below the runner, and a first ejection rod is arranged on the primary ejection mechanism;
the secondary ejection mechanism is movably arranged at the bottom of the cavity and is provided with a plurality of second ejection pin rods;
and the ejector pin push plate is arranged below the fixed die plate, and the bottoms of the first ejector pin rod and the second ejector pin rod are movably abutted against the ejector pin push plate.
In the above ejection mechanism for a plastic mold, an inclined truncated cone-shaped feeding channel is arranged between the runner and the cavity, and an included angle between the feeding channel and the horizontal direction is 40 °.
In the above ejection mechanism for the plastic mold, the small end of the feeding channel is arranged on the side wall of the cavity, and the diameter of the small end is 0.8 mm.
In the ejection mechanism for the plastic mold, the primary ejection mechanism is provided with the stripping block, the stripping block is arranged on the fixed mold plate, a through hole is formed in the middle of the stripping block, and the first ejector pin rod is inserted into the through hole.
In the above ejection mechanism for the plastic mold, a spring is arranged at the bottom of the stripping block.
The utility model also provides a plastic mold for solving the technical problems, which comprises the ejection mechanism for the plastic mold.
Compared with the prior art, the first ejection mechanism is arranged in the middle of the die core plate, so that the stub bar can be separated from a product and pushed out of the fixed die plate, and the problem that the product is ejected out due to latent feeding and the rubber head on the runner is clamped in the die and cannot be taken out is solved.
Drawings
Fig. 1 is a perspective view of an ejection mechanism for a plastic mold and the plastic mold of the present invention;
FIG. 2 is a cross-sectional view of an ejection mechanism for a plastic mold and a plastic mold of the present invention;
FIG. 3 is a cross-sectional view of an ejection mechanism for a plastic mold and a stripper block of the plastic mold of the present invention;
FIG. 4 is a perspective view of an ejection mechanism for a plastic mold and a plastic mold runner and feed channel of the present invention;
in the figure, a fixed die plate 1, a primary ejection mechanism 2, a secondary ejection mechanism 3, an ejector pin push plate 4, a die core plate 5, a runner 6, a cavity 7, a first ejector pin rod 8, a second ejector pin rod 9, a feeding channel 10, an included angle 11, a stripping block 12 and a through hole 13.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1 to 4, this embodiment mainly details the case where the ejection mechanism is applied to an injection mold.
An ejection mechanism for a plastic mold and the plastic mold, comprising: the ejection mechanism comprises a fixed die plate 1, a primary ejection mechanism 2, a secondary ejection mechanism 3 and an ejector pin push plate 4.
A die core plate 5 is detachably arranged on the fixed die plate 1, a runner 6 is arranged on the upper surface of the die core plate 5, two ends of the runner 6 along the length direction are respectively provided with a cavity 7, and the runner 6 is communicated with the cavities 7; the primary ejection mechanism 2 is movably arranged in the middle of the mold core plate 5 and is positioned right below the flow channel 6, and a first ejection rod 8 is arranged on the primary ejection mechanism 2; the secondary ejection mechanism 3 is movably arranged at the bottom of the cavity 7, and a plurality of second ejection rod 9 are arranged on the secondary ejection mechanism 3; the thimble push plate 4 is arranged below the fixed die plate 1, and the bottoms of the first thimble rod 8 and the second thimble rod 9 are movably abutted against the thimble push plate 4.
After the one-time injection of the mold is completed and the mold is opened, the ejector pin push plate 4 pushes the first ejector pin rod 8 and the second ejector pin rod 9 to move, the first ejector pin rod 8 pushes the stub bar attached to the runner 6 out of the fixed mold plate 1 when moving, the stub bar is separated from a product in the cavity 7 when being pushed out of the fixed mold plate 1, and the second ejector pin rod 9 pushes the product out of the cavity 7.
An inclined truncated cone-shaped feeding channel 10 is arranged between the runner 6 and the cavity 7, and an included angle 11 between the feeding channel 10 and the horizontal direction is 40 DEG
At present, the application proportion of the latent glue feeding system in the mold glue feeding system is higher and higher, the space angle of a latent pouring gate in the design stage is determined by a designer according to the adjustment of the mold structure space, the observation in the actual production process of the mold and the communication with a production department find that the included angle between the circular truncated cone-shaped feeding channel 10 and the horizontal direction has great relation between the product demolding and the subsequent product burr cleaning, the included angle 11 is found to be optimal between 30 degrees and 50 degrees through multiple times of attempts, and the optimal angle in the scheme is determined to be 50 degrees according to the size of the product in the embodiment.
Similarly, after determining the included angle between the truncated cone-shaped channel 10 and the horizontal direction, the diameter of the small end when the truncated cone-shaped channel communicates with the side wall of the cavity has a great influence on the appearance of the product, and since the product in the embodiment is small, after many trials, the best effect can be achieved when the diameter of the small end of the truncated cone-shaped channel 10 is 0.8 mm.
The primary ejection mechanism 2 is provided with a stripping block 12, the stripping block 12 is arranged on the fixed die plate 1, a through hole 13 is formed in the middle of the stripping block 12, and the first ejector pin rod 8 is inserted into the through hole 13.
The first ejector pin 8 is used for pushing the stub bar of the runner 6 out of the fixed die plate 1, some waste materials are bound to remain on the first ejector pin 8 due to the temperature rise in the cavity after a period of die production, and the waste materials on the first ejector pin 8 are separated from the first ejector pin 8 under the action of the stripping block 12 when the first ejector pin 8 is reset.
When the first thimble 8 ejects the stub bar on the runner 6, if the holding force between the stub bar and the first thimble 8 is large, some waste materials can remain on the first thimble 8, when the first thimble 8 resets, the first thimble 8 and the stripping block 12 can collide strongly with each other due to the waste materials on the first thimble 8, which can lead to the first thimble 8 breaking or accelerate the abrasion between the first thimble 8 and the stripping block, at this moment, the spring 13 is arranged at the bottom of the stripping block 12, which can form a buffer between the first thimble 8 and the stripping block 12, and play a good protection role for the first thimble 8 and the stripping block 12.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
Moreover, descriptions of the present invention as relating to "first," "second," "a," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications, additions and substitutions for the described embodiments may be made by those skilled in the art without departing from the scope and spirit of the utility model as defined by the accompanying claims.
Claims (6)
1. An ejection mechanism for a plastic mold, comprising:
the die comprises a fixed die plate, a die core plate and a runner, wherein the die core plate is detachably arranged on the fixed die plate, the upper surface of the die core plate is provided with the runner, two ends of the runner in the length direction are respectively provided with a cavity, and the runner is communicated with the cavities;
the primary ejection mechanism is movably arranged in the middle of the die core plate and is positioned right below the runner, and a first ejection rod is arranged on the primary ejection mechanism;
the secondary ejection mechanism is movably arranged at the bottom of the cavity and is provided with a plurality of second ejection pin rods;
and the ejector pin push plate is arranged below the fixed die plate, and the bottoms of the first ejector pin rod and the second ejector pin rod are movably abutted against the ejector pin push plate.
2. An ejection mechanism for plastic molds according to claim 1, wherein an inclined truncated cone shaped feed channel is provided between said runner and said cavity, said feed channel being at an angle of 40 ° to the horizontal.
3. An ejection mechanism for plastic molds according to claim 2, wherein a small end of said feed channel is provided on a side wall of said cavity, said small end having a diameter of 0.8 mm.
4. An ejection mechanism for plastic molds as claimed in claim 1, wherein said one-time ejection mechanism is provided with a stripper block, said stripper block is provided on said stationary platen, a through hole is provided at a middle position of said stripper block, and said first ejector pin rod is inserted into said through hole.
5. An ejection mechanism for plastic molds as recited in claim 4, wherein said stripper block is spring loaded at a bottom thereof.
6. A plastic mold comprising the ejection mechanism for a mold according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121737079.8U CN215969822U (en) | 2021-07-28 | 2021-07-28 | A ejection mechanism and plastic mold for plastic mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121737079.8U CN215969822U (en) | 2021-07-28 | 2021-07-28 | A ejection mechanism and plastic mold for plastic mold |
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| Publication Number | Publication Date |
|---|---|
| CN215969822U true CN215969822U (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121737079.8U Active CN215969822U (en) | 2021-07-28 | 2021-07-28 | A ejection mechanism and plastic mold for plastic mold |
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| CN (1) | CN215969822U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115416238A (en) * | 2022-11-04 | 2022-12-02 | 赫比(成都)精密塑胶制品有限公司 | Mold for separating material belt and mold opening method thereof |
-
2021
- 2021-07-28 CN CN202121737079.8U patent/CN215969822U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115416238A (en) * | 2022-11-04 | 2022-12-02 | 赫比(成都)精密塑胶制品有限公司 | Mold for separating material belt and mold opening method thereof |
| CN115416238B (en) * | 2022-11-04 | 2023-01-24 | 赫比(成都)精密塑胶制品有限公司 | Mold for separating material belt and mold opening method thereof |
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