Multi-stage core-pulling mold structure with inverted buckles at two ends

Abstract

The multistage core-pulling mold structure comprises a female mold base plate, a first female mold core is arranged below the female mold base plate, a female mold dovetail pulling core is arranged at the center of the female mold base plate and the center of the first female mold core, a second female mold core is arranged in the first female mold core, and the female mold dovetail pulling core is slidably connected with the second female mold core. The female die base plate, the first female die core, the female die dovetail loose core and the second female die core are combined to form a female die core component, a male die core component is arranged below the female die core component and comprises a first male die core, and a second male die core is slidably connected into the first male die core. The male mold core II is connected with the male mold dovetail loose core in a sliding manner; the female die core part moves upwards, the male die core part retracts inwards, hard friction with the reverse buckling face of a product in the core pulling process is avoided, and jamming caused by overlapping of movement tracks of the parts is avoided.

Description

Technical Field

[0001] This invention relates to the field of mold technology, and in particular to a multi-stage core-pulling mold structure with inverted ends. Background Technology

[0002] Molds are tools used to produce parts. When traditional molds process both ends and lateral undercuts at the same time, they are prone to jamming due to the overlapping movement trajectories of the parts. Traditional complex undercut parts need to be formed in multiple stages or rely on manual assistance for demolding, which is inefficient. Summary of the Invention

[0003] In view of the above-mentioned problems existing in the prior art, the main objective of the present invention is to provide a multi-stage core-pulling mold structure with inverted ends.

[0004] The technical solution of the present invention is as follows: a multi-stage core-pulling mold structure with inverted ends, including a female mold pad, a female mold core one provided below the female mold pad, a female mold dovetail core pull provided at the center of the female mold pad and the female mold core one, a female mold core two provided inside the female mold core one, the female mold dovetail core pull slidably connected to the female mold core two, the female mold pad, the female mold core one, the female mold dovetail core pull and the female mold core two combined to form a female mold core component, a male mold core component provided below the female mold core component, the male mold core component including a male mold core one, a male mold core two slidably connected inside the male mold core one, a male mold dovetail core pull slidably connected to the male mold core two, a pressure plate fixedly connected to one end of the male mold dovetail core pull, a top block fixedly connected inside the male mold core one, and top rods fixedly connected below the top block.

[0005] In a preferred embodiment, the dovetail core of the female mold is provided with a groove corresponding to the second core of the female mold, and the circumference of the dovetail core of the female mold gradually decreases from top to bottom.

[0006] In a preferred embodiment, the second master mold core is a parting surface composed of multiple components, and the parting surface is attached to the inner wall of the first master mold core.

[0007] In a preferred embodiment, the male mold dovetail core puller has grooves on all four sides, and the grooves on two opposite sides of the male mold dovetail core puller are inclined outward from top to bottom.

[0008] In a preferred embodiment, the second male mold core consists of four parts, one of which contains a pin insert assembly and the third male mold core.

[0009] In a preferred embodiment, the pin assembly is provided with a waist-shaped groove, and a pin is slidably connected to the waist-shaped groove. The two ends of the pin are fixedly connected to the second male mold core.

[0010] In a preferred embodiment, the bottom surface of the female mold core is in contact with the upper surface of the male mold core component.

[0011] Compared with the prior art, the advantages and positive effects of the present invention are that by moving the core component of the female mold upward and shrinking the core component of the male mold inward, hard friction is avoided between the core pulling process and the undercut surface of the product, and the overlapping of the movement trajectories of the components is avoided, which may cause jamming. Attached Figure Description

[0012] Figure 1 This invention provides an overall structural diagram of a multi-stage core-pulling mold structure with inverted ends; Figure 2 This invention provides an exploded structural diagram of a multi-stage core-pulling mold structure with inverted ends; Figure 3 This invention provides a schematic diagram of the position of the insert assembly in a multi-stage core-pulling mold structure with inverted ends.

[0013] Legend: 1. Female mold base plate; 2. Female mold core 1; 3. Female mold dovetail core pull; 4. Male mold core 1; 5. Female mold core 2; 6. Male mold core 2; 7. Male mold dovetail core pull; 8. Pressure plate; 9. Ejector pin; 10. Ejector block; 11. Pin insert assembly; 12. Male mold core 3. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0015] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Example A multi-stage core-pulling mold structure with inverted ends includes a female mold pad 1, a female mold core 2 below the female mold pad 1, a female mold dovetail core 3 at the center of the female mold pad 1 and the female mold core 2, a female mold core 5 inside the female mold core 2, the female mold dovetail core 3 slidably connected to the female mold core 2 5, the female mold pad 1, the female mold core 1 2, the female mold dovetail core 3 and the female mold core 2 5 are combined to form a female mold core component, a male mold core component is provided below the female mold core component, the male mold core component includes a male mold core 4, a male mold core 6 slidably connected inside the male mold core 4, a male mold dovetail core 7 slidably connected to the male mold core 2 6, a pressure plate 8 is fixedly connected to one end of the male mold dovetail core 7, a top block 10 is fixedly connected inside the male mold core 4, and a top rod 9 is fixedly connected below the top block 10 respectively. The core pulling action is performed upward by the dovetail core pulling 3 of the female mold. The core 2 5 of the female mold moves in parallel, and the product located between the core 2 5 of the female mold shrinks inward, so that hard friction occurs between the core pulling and the undercut surface of the product, reducing the risk of surface damage to the product and creating space for the subsequent parting surface to open. As the dovetail core-pulling 7 of the male mold moves downward and the ejector pin 9 moves upward, the core 6 of the male mold moves inward in parallel. At this time, the insert pin above the insert pin assembly 11 pulls the core downward, accurately separating it from the local undercut surface of the product, such as the undercut surface of the glue area. Through short-stroke precise core pulling, the integrity of the local details of the product is ensured, avoiding product deformation or demolding difficulties caused by incomplete core pulling. The overall core pulling of the male mold end is completed, separating it from the undercut area of ​​the male mold side of the product. The dovetail structure can improve the stability and guiding accuracy of the core pulling process, avoid deviation during the core pulling process, and ensure the overall dimensional accuracy of the product. As the dovetail core-pulling 7 of the male mold moves downward, it causes the corresponding parts of the undercut area of ​​the product to retract inward, completely separating them from the remaining undercut structure of the product. Through the "retreat + retraction" compound action, the problem of simultaneous demolding of multi-directional undercuts is solved, avoiding damage to the product caused by forced demolding. The ejector pin 9 enables the final demolding of the product, and the synchronous action of the four sets of ejector blocks ensures that the product is subjected to uniform force, avoids tilting or deformation during the ejection process, and ensures that the appearance and dimensions of the product are qualified after demolding.

[0018] The dovetail core-pulling device 3 of the female mold is provided with a groove corresponding to the second core 5 of the female mold. The circumference of the dovetail core-pulling device 3 of the female mold gradually decreases from top to bottom. The slider on the second core 5 of the female mold is trapezoidal to prevent the second core 5 of the female mold from disengaging from the groove. This allows the second core 5 of the female mold to retract inward when the dovetail core-pulling device 3 of the female mold moves.

[0019] The second core of the female mold 5 is a parting surface composed of multiple parts. The parting surface is attached to the inner wall of the first core of the female mold 2. During the demolding process, the parting surface will be officially opened. The opening action expands the internal operating space of the mold. The slider transmission on the second core of the female mold 5 ensures the precise movement trajectory of the slider, leaving enough space for the subsequent core pulling and pin insertion actions of the male mold, while avoiding interference between the slider and other parts.

[0020] The male mold dovetail core puller 7 has grooves on all four sides. The grooves on the opposite two sides of the male mold dovetail core puller 7 are inclined outward from top to bottom to complete the overall core pulling of the male mold end and separate it from the undercut area of ​​the male mold side of the product. The dovetail structure can improve the stability and guiding accuracy of the core pulling process, avoid the deviation during the core pulling process, and ensure the overall dimensional accuracy of the product. The outward inclination can drive the male mold core 2 6 to move in parallel inward.

[0021] The second core of the public mold consists of four parts, one of which contains a pin insert assembly 11 and the third core of the public mold 12.

[0022] The pin insertion assembly 11 has a waist-shaped groove, and a pin is slidably connected to the waist-shaped groove. The two ends of the pin are fixedly connected to the male mold core 6. The length of the waist-shaped groove limits the range of movement of the pin insertion assembly 11. The length of the waist-shaped groove can be used to achieve precise core pulling with a short stroke.

[0023] The bottom surface of the female mold core 25 contacts the upper surface of the male mold core component, facilitating simultaneous demolding of the upper and lower parts.

[0024] Finally, it should be noted that the above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-stage core-pulling mold structure with inverted ends, comprising a female mold pad (1), characterized in that: The female mold pad (1) is provided with a female mold core 1 (2) below it. The female mold pad (1) and the female mold core 1 (2) are provided with a female mold dovetail core pull (3) at the center position. The female mold core 1 (2) is provided with a female mold core 2 (5). The female mold dovetail core pull (3) is slidably connected to the female mold core 2 (5). The female mold pad (1), female mold core 1 (2), female mold dovetail core pull (3) and female mold core 2 (5) are combined to form a female mold core component. The female mold core component is provided with a male mold core component below it. The male mold core component includes a male mold core 1 (4). The male mold core 1 (4) is slidably connected to the male mold core 2 (6). The male mold core 2 (6) is slidably connected to the male mold dovetail core pull (7). One end of the male mold dovetail core pull (7) is fixedly connected to a pressure plate (8). The male mold core 1 (4) is fixedly connected to a top block (10). The top block (10) is fixedly connected to a top rod (9) below it.

2. The multi-stage core-pulling mold structure with inverted ends as described in claim 1, characterized in that: The dovetail core puller (3) of the female mold is provided with a groove corresponding to the core of the second female mold (5), and the circumference of the dovetail core puller (3) of the female mold gradually decreases from top to bottom.

3. The multi-stage core-pulling mold structure with inverted ends as described in claim 1, characterized in that: The second core of the mother mold (5) is a parting surface composed of multiple components, and the parting surface is attached to the inner wall of the first core of the mother mold (2).

4. The multi-stage core-pulling mold structure with inverted ends as described in claim 1, characterized in that: The male mold dovetail core puller (7) has grooves on all four sides, and the grooves on the opposite two sides of the male mold dovetail core puller (7) are inclined outward from top to bottom.

5. The multi-stage core-pulling mold structure with inverted ends as described in claim 1, characterized in that: The second public mold core (6) consists of four parts, one of which contains a pin assembly (11) and the third public mold core (12).

6. The multi-stage core-pulling mold structure with inverted ends as described in claim 5, characterized in that: The pin assembly (11) is provided with a waist-shaped groove, and a pin is slidably connected to the waist-shaped groove. The two ends of the pin are fixedly connected to the second male mold core (6).

7. The multi-stage core-pulling mold structure with inverted ends as described in claim 1, characterized in that: The bottom surface of the female mold core 2 (5) is in contact with the upper surface of the male mold core component.

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