CN222538209U - A thin-walled long core-pulling injection mold - Google Patents
A thin-walled long core-pulling injection mold Download PDFInfo
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- CN222538209U CN222538209U CN202420489747.7U CN202420489747U CN222538209U CN 222538209 U CN222538209 U CN 222538209U CN 202420489747 U CN202420489747 U CN 202420489747U CN 222538209 U CN222538209 U CN 222538209U
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Abstract
本实用新型提供一种薄壁长抽芯注塑模具，包括前模、前模仁、后模、后模仁和长抽芯机构；长抽芯机构包括驱动器、抽芯滑块组件、锁模组件、成型滑块和成型轴柱；抽芯滑块组件和成型滑块均可侧向滑动的装配在后模上，抽芯滑块组件和成型滑块之间通过延迟联动件相连，成型轴柱的第一端固定在抽芯滑块组件上，成型轴柱的第二端穿过成型滑块并插入后模仁；锁模组件阻挡在成型滑块的外侧以限制成型滑块向外抽离；抽芯滑块组件具有对应阻挡块的压块，以在抽芯滑块组件抽芯移动中驱使锁模组件让位；驱动器驱动连接抽芯滑块组件以驱使抽芯滑块组件滑动。实现薄壁长条形产品的稳定抽芯。
The utility model provides a thin-walled long core-pulling injection mold, comprising a front mold, a front mold core, a rear mold, a rear mold core and a long core-pulling mechanism; the long core-pulling mechanism comprises a driver, a core-pulling slider assembly, a clamping assembly, a molding slider and a molding shaft column; the core-pulling slider assembly and the molding slider can be laterally slidably assembled on the rear mold, the core-pulling slider assembly and the molding slider are connected by a delayed linkage, the first end of the molding shaft column is fixed on the core-pulling slider assembly, the second end of the molding shaft column passes through the molding slider and is inserted into the rear mold core; the clamping assembly blocks the outer side of the molding slider to limit the molding slider from being pulled outward; the core-pulling slider assembly has a pressure block corresponding to the blocking block, so as to drive the clamping assembly to give way during the core-pulling movement of the core-pulling slider assembly; the driver drives the core-pulling slider assembly to drive the core-pulling slider assembly to slide, so as to realize the stable core-pulling of thin-walled long strip products.
Description
Technical Field
The utility model relates to the field of injection molds, in particular to a thin-wall long core-pulling injection mold.
Background
The injection mold is a tool for producing plastic products, is also a tool for endowing the plastic products with complete structures and accurate dimensions, is a processing method used for mass production of parts with complex shapes, and specifically refers to a method for injecting heated and melted plastic into a mold cavity by an injection molding machine under high pressure, and obtaining a formed product after cooling and solidifying.
When some strip-shaped hollow products are obtained through injection molding, the insertion of the molding column into the molding cavity is needed, and after injection molding is finished, the molding column is extracted first and then the demolding is carried out. Because the product has characteristics of cavity, longer and the wall is thin, shaping post and product area of contact are big, in order to prevent damage product when loosing core, need design a comparatively stable structure of loosing core.
Disclosure of utility model
Therefore, the utility model provides a thin-wall long core-pulling injection mold for solving the problems.
In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:
the long core-pulling mechanism comprises a driver, a core-pulling slide block assembly, a mold locking assembly, a forming slide block and a forming shaft column, wherein the core-pulling slide block assembly and the forming slide block can be assembled on the rear mold in a side sliding mode, the core-pulling slide block assembly and the forming slide block are connected through a delay linkage piece, a first end of the forming shaft column is fixed on the core-pulling slide block assembly, a second end of the forming shaft column penetrates through the forming slide block and is inserted into the rear mold core, the mold locking assembly is blocked at the outer side of the forming slide block to limit the outward pulling of the forming slide block, the core-pulling slide block assembly is provided with a pressing block corresponding to the mold locking assembly, so that the mold locking assembly is driven to be positioned in the core-pulling movement of the core-pulling slide block assembly, and the driver is driven to be connected with the core-pulling slide block assembly in a driving mode to slide the core-pulling slide block assembly.
Further, the lock module assembly comprises a blocking block and an elastic piece, the blocking block is lifted to block the forming sliding block under the action of the elastic piece, and the pressing block of the core pulling sliding block assembly corresponds to the blocking block.
Further, the blocking block is provided with a first inclined matching surface, the pressing block is provided with a second inclined matching surface, and core pulling movement of the core pulling sliding block assembly drives the blocking block to descend to give way through inclined guide matching of the second inclined matching surface of the pressing block and the first inclined matching surface of the blocking block.
Further, the number of the elastic pieces is two, the elastic pieces respectively act on two sides of the blocking block, and the middle position of the blocking block is used for being matched with the pressing block.
The delay linkage piece is characterized in that the delay linkage piece is a connecting screw, a first end of the connecting screw penetrates through the forming sliding block and is fixed on the core pulling sliding block assembly, a second end of the connecting screw is a nut, an abutting step corresponding to the nut is arranged on the forming sliding block, when the core pulling sliding block assembly abuts against the forming sliding block, the abutting step is arranged at a distance from the nut, and when the core pulling sliding block assembly is separated from the forming sliding block for a certain distance, the nut abuts against the abutting step, so that the forming sliding block and the core pulling sliding block assembly form linkage.
Further, the molding shaft post is a hollow cylinder, and a cooling pipe is assembled in the molding shaft post.
Further, the core pulling sliding block assembly specifically comprises a first sliding block, a second sliding block and a pressing block, the first sliding block and the second sliding block are spliced and fixed, the pressing block is fixedly connected with the first sliding block and the second sliding block, a limiting boss extending outwards in the radial direction is formed at the first end of the forming shaft column, the limiting boss is limited between the first sliding block and the second sliding block, and the cooling pipe is fixed in the first sliding block and penetrates through the forming shaft column.
Further, the driver is an electric push rod or an oil cylinder.
Furthermore, the rear die is also provided with an ejection mechanism, the ejection mechanism comprises an ejector plate, and a product ejector pin and a gate ejector pin which are connected to the ejector plate, the product ejector pin is used for corresponding to a product, the gate ejector pin is used for corresponding to a gate material, and the product ejector pin and the ejector plate form delayed linkage fit so that the product ejector pin is ejected out of the gate ejector pin.
Furthermore, the product thimble and the thimble plate form a structure of delayed linkage fit, wherein the thimble plate is provided with a limiting cavity, and the end part of the product thimble is limited in the limiting cavity of the thimble plate and can move up and down in the range of the limiting cavity.
The technical scheme provided by the utility model has the following beneficial effects:
When the injection mold provided by the application is used for core pulling, the driver drives the core pulling sliding block assembly to outwards translate for core pulling, and the molding sliding block is blocked by the mold locking assembly and kept motionless in the initial stage, so that a product is supported, and the core pulling sliding block assembly drives the molding shaft column to be pulled out for a certain distance in advance, so that the molding shaft column is separated from the product in advance, the stable separation of the molding shaft column and the product is realized, and the damage of the product is effectively avoided. And then, the core-pulling sliding block assembly continuously moves outwards to drive the lock module assembly to be out of position through the pressing block, and the core-pulling sliding block assembly drives the forming sliding block to move outwards together through the delay linkage piece, so that the lateral complete separation is realized.
Drawings
FIG. 1 is a schematic diagram of a thin-wall long core-pulling injection mold in an embodiment;
FIG. 2 is a schematic diagram showing a part of the structure of a thin-wall long core-pulling injection mold in an embodiment;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is an enlarged schematic view of region C of FIG. 3;
FIG. 5 is a cross-sectional view taken along line B-B of FIG. 2;
FIG. 6 is an enlarged schematic view of region D of FIG. 5;
FIG. 7 is an enlarged schematic view of the area E of FIG. 5;
FIG. 8 is a schematic view showing a part of the structure of the long core-pulling mechanism in the embodiment;
FIG. 9 is an exploded view of the press block and locking module of the embodiment.
Detailed Description
For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present utility model. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.
In the description of the present invention, the terms "upper", "lower", "left", "right", "front", "rear", and the like are used for convenience of description and simplicity of operation only, and do not denote or imply that the apparatus or elements in question must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
The utility model will now be further described with reference to the drawings and detailed description.
Referring to fig. 1 to 9, the thin-wall long core-pulling injection mold provided in this embodiment includes a front mold 11, a front mold core (not shown) disposed on the front mold 11, a rear mold 12, a rear mold core 13 disposed on the rear mold 12, and a long core-pulling mechanism, wherein the long core-pulling mechanism includes a driver 60, a core-pulling slide assembly 20, a mold locking assembly 40, a molding slide 30, and a molding shaft 70, the core-pulling slide assembly 20 and the molding slide 30 are both assembled on the rear mold 12 in a laterally slidable manner, and the molding slide 30 is matched with the rear mold core 13 for molding a product. The core-pulling slide block assembly 20 and the forming slide block 30 are connected through the delay linkage piece 50, so that the core-pulling slide block assembly 20 and the forming slide block 30 form delay linkage fit, namely, after the core-pulling slide block assembly 20 moves outwards for a certain distance, the core-pulling slide block assembly and the forming slide block 30 form linkage through the delay linkage piece 50.
The first end of the molding peg 70 is fixed to the core-pulling slide assembly 20, and the second end of the molding peg 70 passes through the molding slide 30 and is inserted into the rear mold core 13 for molding a product.
The mold locking assembly 40 is blocked on the outer side of the forming slide block 30 to limit the forming slide block 30 from being pulled outwards, the core pulling slide block assembly 20 is provided with a pressing block 23 corresponding to the mold locking assembly 40 to drive the mold locking assembly 40 to be out of position in the core pulling movement of the core pulling slide block assembly 20, and the driver 60 is in driving connection with the core pulling slide block assembly 20 to drive the core pulling slide block assembly 20 to slide.
When the thin-wall long core-pulling injection mold is used for injection molding to obtain a product and demolding, the front mold 11 and the rear mold 12 complete the mold opening action in the first step, and the molding shaft post 70 and the molding slide block 30 are required to be separated in the second step, specifically, the driver 60 drives the core-pulling slide block assembly 20 to translate outwards to pull the core, in the initial stage, the core-pulling slide block assembly 20 and the molding slide block 30 are not linked, the molding slide block 30 is blocked by the mold locking assembly 40 and kept motionless so as to support the product, the core-pulling slide block assembly 20 drives the molding shaft post 70 to be pulled out a certain distance in advance, so that the molding shaft post 70 is separated from the product in advance, the stable separation of the molding shaft post 70 and the product is realized, and the product is effectively prevented from being damaged. After that, the core-pulling slide block assembly 20 is continuously moved outwards to drive the die locking assembly 40 to be out of position through the pressing block 23, and the core-pulling slide block assembly 20 drives the forming slide block 30 to be moved outwards together through the delay linkage piece 50, so that the lateral complete separation is realized. And thirdly, ejecting the product, and completing demolding.
In this embodiment, the mold locking assembly 40 includes a blocking block 41 and an elastic member 42, wherein the blocking block 41 is lifted to block the molding slide 30 by the elastic member 42, and the elastic member 42 is disposed at the bottom of the blocking block 41 and applies an upward elastic force to the blocking block 41, so that the blocking block 41 is lifted to the outside of the molding slide 30, thereby blocking the molding slide 30, as shown in fig. 8. The pressing block 23 of the core-pulling sliding block assembly 20 corresponds to the blocking block 41, so as to drive the blocking block 41 to descend for yielding in the core-pulling movement of the core-pulling sliding block assembly 20.
Specifically, the blocking block 41 has a first inclined mating surface 411, the pressing block 23 has a second inclined mating surface 231, the core-pulling movement of the core-pulling slider assembly 20 drives the blocking block 41 to descend for abdication through the inclined guiding and mating of the second inclined mating surface 231 of the pressing block 23 and the first inclined mating surface 411 of the blocking block 41, and in this way, the pressing block 23 drives the blocking block 41 more smoothly and is not easy to be blocked.
The elastic pieces 42 are specifically springs, the number of the springs is two, the springs respectively act on two sides of the blocking piece 41, the middle position of the blocking piece 41 is used for being matched with the pressing block 23, and the elastic pieces are arranged in such a way that acting forces are balanced and are not easy to deviate.
The above-described mold locking assembly 40 is a preferred configuration, although in other embodiments, the configuration of the mold locking assembly 40 may be implemented using other configurations.
In this embodiment, the delay linkage 50 is a connection screw 51, a first end of the connection screw 51 passes through the forming slider 30 and is fixed on the core-pulling slider assembly 20, a second end of the connection screw 51 is a nut 52, the forming slider 30 is provided with an abutment step 31 corresponding to the nut 52, and when the core-pulling slider assembly 20 abuts against the forming slider 30, as shown in fig. 4, the abutment step 31 is spaced from the nut 52. When the core-pulling slide block assembly 20 is separated from the forming slide block 30 by a certain distance, the nut 52 is abutted against the abutment step 31, so that the forming slide block 30 and the core-pulling slide block assembly 20 form linkage. The delayed linkage fit between the core-pulling slide block assembly 20 and the forming slide block 30 is realized by adopting the connecting screw 51, so that the structure design is simple and the realization is easy. Of course, in other embodiments, other components having a delayed linkage effect may be used instead.
The molding shaft post 70 is a hollow cylinder, the cooling pipe 71 is assembled in the molding shaft post 70, and the cooling pipe 71 is additionally arranged, so that the cooling molding of the injection molding product can be accelerated.
Specifically, the core pulling slide block assembly 20 specifically includes a first slide block 21, a second slide block 22 and a pressing block 23, the first slide block 21 and the second slide block 22 are fixedly spliced, the pressing block 23 is fixedly connected with the first slide block 21 and the second slide block 22, a limiting boss 72 extending radially outwards is formed at a first end of the forming shaft post 70, the limiting boss 72 is limited between the first slide block 21 and the second slide block 22, and the cooling tube 71 is fixed in the first slide block 21 and penetrates through the forming shaft post 70. In this way, the assembly of the cooling tube 71 and the shaped stud 70 is achieved.
The actuator 60 is an oil cylinder, which is commonly used in the injection molding field, and of course, in other embodiments, an actuator such as an electric push rod that can be pushed and pulled linearly may be used.
Specifically, in this embodiment, the rear mold 12 is further provided with an ejection mechanism, the ejection mechanism includes an ejector plate 14, and a product ejector pin 15 and a gate ejector pin (not shown) connected to the ejector plate 14, where the product ejector pin 15 is used for corresponding products, and the gate ejector pin is used for corresponding gate materials, and the product ejector pin 15 and the ejector plate 14 form a delayed linkage fit to enable the product ejector pin 15 to eject out of the gate ejector pin after the product ejector pin. When ejection is started, the gate ejector pins eject the gate material in advance, so that the gate material is separated from a product, and then the product ejector pins 15 eject the product, so that the gate material and the product can be separated in advance.
Specifically, the product thimble 15 and the thimble plate 14 form a delayed linkage fit structure, as shown in fig. 7, in which the thimble plate 14 is formed with a limiting cavity 141, and the end of the product thimble 15 is limited in the limiting cavity 141 of the thimble plate 14 and can move up and down within the range of the limiting cavity 141, i.e. the height dimension of the limiting cavity 141 is greater than the thickness dimension of the end of the product thimble 15. When the ejector plate 14 starts to lift, the gate ejector pin and the ejector plate 14 synchronously act, the product ejector pin 15 is kept still, and when the ejector plate 14 is lifted to the bottom wall of the limiting cavity 141 to be propped against the product ejector pin 15, the product ejector pin 15 is synchronously driven to move upwards to eject, so that the delayed ejection of the product ejector pin 15 is realized. Of course, in other embodiments, the delayed ejection structure of the product ejector pins 15 is not limited thereto.
While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420489747.7U CN222538209U (en) | 2024-03-14 | 2024-03-14 | A thin-walled long core-pulling injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420489747.7U CN222538209U (en) | 2024-03-14 | 2024-03-14 | A thin-walled long core-pulling injection mold |
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| Publication Number | Publication Date |
|---|---|
| CN222538209U true CN222538209U (en) | 2025-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420489747.7U Active CN222538209U (en) | 2024-03-14 | 2024-03-14 | A thin-walled long core-pulling injection mold |
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| Country | Link |
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| CN (1) | CN222538209U (en) |
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- 2024-03-14 CN CN202420489747.7U patent/CN222538209U/en active Active
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