Lower mold core pulling structure

Abstract

The utility model discloses a lower mould core-pulling structure, it includes the lower mould and movable mould who are connected, and be located on the ejector plate of lower mould, be equipped with the core-pulling needle of extending to movable mould cavity in the ejector plate, one side of lower mould is equipped with movable support, and support is located in the lower end of ejector plate, makes the ejector plate hang in the air, when opening mould, support moves and makes the ejector plate drive core-pulling needle to complete core-pulling downward. The utility model discloses when needing to carry out core-pulling to the workpiece in movable mould cavity, support moves along the default direction, makes the ejector plate lack support, at this moment, the ejector plate loses the support force, and moves downward under the action of gravity, and drives the core-pulling needle fixed on it synchronous down, thereby stably separates from the workpiece internal hole site or precision feature.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a core-pulling structure for a lower mold. Background Technology

[0002] In the field of precision injection molding, products with small size, complex structure and high precision requirements (such as micro gears, precision connectors, medical components, etc.) pose severe challenges to mold design and molding process. Traditional injection molds usually adopt simple ejector pins or push plates to eject the product directly after the mold is opened.

[0003] However, for products with small holes, thin walls, or high-precision fit characteristics, direct ejection can easily lead to the following problems: uneven adhesion between the product and the mold or uneven ejection force may cause the product to warp or break. In particular, when the ejector pin acts on the thin-walled area, the hole position will have dimensional deviations due to ejection friction or elastic recovery, affecting the assembly function of the workpiece. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] To address the aforementioned problems, this utility model provides the following technical solution:

[0006] A core-pulling structure for a lower mold includes a lower mold and a moving mold connected together, and an ejector plate disposed on the lower mold. The ejector plate is provided with a core-pulling pin extending into the cavity of the moving mold. A movable support member is provided on one side of the lower mold. The support member is disposed at the lower end of the ejector plate, so that the ejector plate is suspended in the air. When the mold is opened, the support member moves, causing the ejector plate to drive the core-pulling pin downward to complete the core-pulling.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] As a preferred embodiment of the lower mold core-pulling structure of this utility model, the ejector plate includes an upper plate and a lower plate, one end of the core-pulling pin is disposed in the lower plate, and the support member abuts against the lower plate.

[0009] In a preferred embodiment of the lower mold core-pulling structure of this utility model, the support member is a telescopic cylinder, and the output end of the telescopic cylinder abuts against the lower plate.

[0010] As a preferred embodiment of the lower mold core-pulling structure of this utility model, the ejector plate has a groove on one side corresponding to the support member, and a movable block is slidably connected in the groove. One end of the movable block extends out from the lower part of the groove and abuts against the support member.

[0011] As a preferred embodiment of the lower mold core-pulling structure of this utility model, the inner wall of the slide groove is provided with multiple threaded openings arranged along the length of the slide groove, and a screw is inserted through the moving block, and the screw is threadedly connected to the threaded opening.

[0012] As a preferred embodiment of the lower mold core-pulling structure of this utility model, a drive cylinder is connected to one side of the support member, and the drive cylinder is connected to the lower mold.

[0013] As a preferred embodiment of the lower mold core-pulling structure of this utility model, the side corner of the lower end of the moving block is provided with a slope structure, and the top of the support member is provided with an arc adapted to the slope structure.

[0014] The beneficial effects of this utility model are: when it is necessary to pull the core of the workpiece in the moving mold cavity, the support moves along the preset direction, so that the ejector plate is unsupported. At this time, the ejector plate loses its support force and moves downward under the action of gravity, and drives the core-pulling pin fixed on it to move downward synchronously, so as to smoothly pull it out from the internal hole or precision feature of the workpiece. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0016] Fig. 1 This is a perspective view of the entire embodiment.

[0017] Fig. 2 This is a cross-sectional view of the entire embodiment.

[0018] Fig. 3 This is a perspective view of the moving model in this embodiment.

[0019] In the figure: lower mold 100, moving mold 200, ejector plate 300, core puller 301, upper plate 302, lower plate 303, slide groove 304, threaded opening 304-1, moving block 305, screw 305-1, support 400, drive cylinder 500. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0023] Example

[0024] Reference Figs. 1 to 3 This embodiment of the present invention provides a lower mold core-pulling structure, including a lower mold 100 and a moving mold 200 connected together, and an ejector plate 300 disposed on the lower mold 100. The ejector plate 300 is provided with a core-pulling pin 301 extending into the mold cavity of the moving mold 200. A movable support member 400 is provided on one side of the lower mold 100. The support member 400 is disposed at the lower end of the ejector plate 300, so that the ejector plate 300 is suspended in the air. When the mold is opened, the support member 400 moves, causing the ejector plate 300 to drive the core-pulling pin 301 downward to complete the core-pulling. When it is necessary to pull the core of the workpiece in the mold cavity of the moving mold 200, the support member 400 moves in a preset direction, so that the ejector plate 300 loses its support. At this time, the ejector plate 300 loses its support force and moves downward under the action of gravity, driving the core-pulling pin 301 fixed on it to move downward synchronously, thereby smoothly pulling it out from the internal hole or precision feature of the workpiece.

[0025] It should be noted that during the core-pulling process, the workpiece is always securely encased by the cavity of the moving mold 200 until the core-pulling pin 301 is completely withdrawn, ensuring the dimensional stability of internal holes or complex features and avoiding dimensional deviations caused by friction or elastic recovery.

[0026] The ejector plate 300 includes an upper plate 302 and a lower plate 303. One end of the core-pulling needle 301 is located inside the lower plate 303, and the support member 400 abuts against the lower plate 303.

[0027] The support component 400 is a telescopic cylinder, and the output end of the telescopic cylinder abuts against the lower plate 303. When the output shaft of the telescopic cylinder retracts, the lower plate 303 moves downward due to the lack of support, which in turn drives the core-pulling needle 301 downward to pull the core.

[0028] The ejector plate 300 has a groove 304 on one side corresponding to the support member 400. A movable block 305 is slidably connected in the groove 304. One end of the movable block 305 extends out from the lower part of the groove 304 and abuts against the support member 400.

[0029] The inner wall of the slide 304 has multiple threaded openings 304-1 arranged along the length of the slide. The moving block 305 has a screw 305-1 inserted through it, and the screw 305-1 is threadedly connected to the threaded openings 304-1. The movable block 305 is equipped with a screw 305-1, the two ends of which are respectively engaged with the threaded openings 304-1 on the slide groove 304. By rotating the screw 305-1, the movable block 305 is free from its limit and can slide up and down within the slide groove 304 for adjustment. When the movable block 305 is adjusted to the desired position, the screw 305-1 is screwed into the corresponding threaded opening 304-1, thus achieving reliable fixation between the movable block 305 and the ejector plate 300. This means that during adjustment, only the screw 305-1 needs to be loosened, the movable block 305 can be slid to the target position, and then it can be tightened again. No parts need to be disassembled, making the operation simple and quick. Furthermore, by changing the fixed position of the movable block 305, the initial height of the core-pulling pin 301 can be flexibly adjusted to meet the molding requirements of different depth features, greatly improving the versatility of the mold.

[0030] A drive cylinder 500 is connected to one side of the support member 400, and the drive cylinder 500 is connected to the lower mold 100. The drive cylinder 500 is used to adjust the left and right translation of the support member 400. When it moves to the left, it lifts the moving block 305, and the ejector plate 300 is lifted accordingly. When it moves to the right, the support member 400 separates from the moving block 305, and the ejector plate 300 slides down under the action of inertia, driving the core-pulling pin 301 to pull the core.

[0031] The lower end of the movable block 305 has a beveled corner, and the top of the support member 400 has an arc that matches the beveled structure. The beveled structure makes it easier for the left-moving support member 400 to lift the movable block 305.

[0032] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0033] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0034] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A lower mold core-pulling structure, comprising a lower mold (100) and a moving mold (200) connected to each other, and an ejector plate (300) disposed on the lower mold (100), characterized in that: The ejector plate (300) is provided with a core-pulling pin (301) extending into the cavity of the moving mold (200); a movable support member (400) is provided on one side of the lower mold (100). The support member (400) is located at the lower end of the ejector plate (300), so that the ejector plate (300) is suspended in the air. When the mold is opened, the support member (400) moves to make the ejector plate (300) drive the core-pulling pin (301) downward to complete the core-pulling.

2. The lower mold core-pulling structure as described in claim 1, characterized in that: The ejector plate (300) includes an upper plate (302) and a lower plate (303). One end of the core-pulling needle (301) is located inside the lower plate (303), and the support member (400) abuts against the lower plate (303).

3. The lower mold core-pulling structure as described in claim 2, characterized in that: The support member (400) is a telescopic cylinder, and the output end of the telescopic cylinder abuts against the lower plate (303).

4. The lower mold core-pulling structure as described in claim 1, characterized in that: The ejector plate (300) has a groove (304) on one side corresponding to the support member (400). A movable block (305) is slidably connected in the groove (304). One end of the movable block (305) extends out from the lower part of the groove (304) and abuts against the support member (400).

5. The lower mold core-pulling structure as described in claim 4, characterized in that: The inner wall of the slide (304) is provided with a plurality of threaded openings (304-1) arranged along the length of the slide. A screw (305-1) is inserted through the moving block (305), and the screw (305-1) is threadedly connected to the threaded opening (304-1).

6. The lower mold core-pulling structure as described in claim 4, characterized in that: The support member (400) is connected to a drive cylinder (500) on one side, and the drive cylinder (500) is connected to the lower mold (100).

7. The lower mold core-pulling structure as described in claim 4, characterized in that: The lower end of the movable block (305) has a beveled structure at the side corner, and the top of the support member (400) has an arc that matches the beveled structure.

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