Secondary slide ejection mechanism

Abstract

The application discloses a secondary slider demolding mechanism, which comprises a first slider assembly, a second slider assembly and a guide column fixing block. The first slider assembly comprises a first slider. The second slider assembly comprises a base, a second slider, an arc slider and a swing lever. The base is fixed to the first slider and comprises an arc guide part and a straight line guide part. The second slider is in sliding fit with the straight line guide part. The arc slider is in sliding fit with the arc guide part. The swing lever is hingedly connected to the second slider and the arc slider at two ends. The guide column fixing block is fixed with a first inclined guide column and a second inclined guide column. The first inclined guide column is in sliding fit with the first slider. The second inclined guide column is in sliding fit with the second slider. In the mold closing state, the distance between the second inclined guide column and the second slider is smaller than the distance between the first inclined guide column and the first slider. The arc demolding and the straight line demolding can be sequentially completed through one mold opening action. The structure is compact, no additional power source is needed, and the timing control is accurate and reliable.

Description

Technical Field

[0001] This invention relates to a secondary slider demolding mechanism. Background Technology

[0002] In injection mold design, when a product contains both structures requiring linear core-pulling for demolding and structures requiring arc-shaped rotation for demolding, traditional demolding methods typically require separate demolding mechanisms to achieve demolding actions in different directions. For example, for a product with both linear core-pulling and arc-shaped undercut features requiring arc-shaped demolding, existing technologies often employ two independent sliding block mechanisms to complete linear core-pulling and arc-shaped core-pulling respectively.

[0003] However, this approach of setting up separate demolding mechanisms has several drawbacks. First, two independent demolding mechanisms occupy a significant amount of mold space, increasing the overall size of the mold and hindering miniaturization and lightweight design. Second, the sequence of actions of the two mechanisms is difficult to control precisely, easily leading to disordered demolding and product damage. Furthermore, independent demolding mechanisms increase mold manufacturing costs and maintenance complexity, reducing mold reliability and production efficiency. Therefore, appropriate technical solutions are needed to address these issues. Summary of the Invention

[0004] To overcome the aforementioned deficiencies of the prior art, the present invention provides a secondary slider demolding mechanism to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution of the present invention is to design a secondary slider demolding mechanism, including a first slider assembly, a second slider assembly, and a guide post fixing block; The first slider assembly is slidably connected to the injection mold, and the first slider assembly includes a first slider; The second slider assembly includes a base, a second slider, an arc slider, and a rocker arm. The base is fixedly connected to the first slider and includes an arc guide portion and a straight guide portion. The second slider is slidably engaged with the straight guide portion, and the arc slider is slidably engaged with the arc guide portion. The two ends of the rocker arm are respectively hinged to the second slider and the arc slider. The guide post fixing block is fixedly connected to the injection mold, and the guide post fixing block is fixedly connected to a first inclined guide post and a second inclined guide post. The first inclined guide post is slidably engaged with the first slider, and the second inclined guide post is slidably engaged with the second slider. In the mold closing state, the distance between the second inclined guide post and the second slider is less than the distance between the first inclined guide post and the first slider.

[0006] Preferably, the first slider has an opening through which the arc-shaped slider passes.

[0007] Preferably, the guide post fixing seat is provided with a notch for avoiding the second slider assembly.

[0008] Preferably, the first slider assembly further includes a wear-resistant block, which is fixedly connected to the first slider.

[0009] Preferably, the arc-shaped slider is provided with arc-shaped pressure strips on both sides.

[0010] Preferably, straight pressure strips are provided on both sides of the second slider.

[0011] The advantages and beneficial effects of this invention are as follows: It provides a secondary slider demolding mechanism with a reasonable structure. By setting the second slider assembly on the first slider assembly, the two demolding structures are integrated in the same space, which significantly reduces the overall volume of the mold and lowers the manufacturing cost of the mold. Furthermore, it enables the sequential control of the second slider assembly acting first and the first slider assembly acting later when the mold is opened, ensuring that the arc core pulling is completed before the straight core pulling, thus avoiding product damage caused by a chaotic demolding sequence. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the present invention.

[0013] Figure 2 This is a schematic diagram of the first slider in this invention.

[0014] Figure 3 This is a schematic diagram of the assembly structure of the second slider assembly in this invention.

[0015] Figure 4 This is a schematic diagram of the exploded structure of the second slider assembly in this invention.

[0016] Figure 5 This is a schematic diagram of the first slider assembly of the present invention in the closed state of the injection mold.

[0017] Figure 6 This is a schematic diagram of the second slider assembly of the present invention in the closed state of the injection mold.

[0018] Figure 7 This is a schematic diagram of the present invention when the first inclined guide post is in contact with the first slider in the open state of the injection mold.

[0019] Figure 8 This is a schematic diagram of the second slider assembly of the present invention in the open state of the injection mold. Detailed Implementation

[0020] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0021] The specific technical solution of this invention is as follows: In one specific embodiment, such as Figures 1 to 8 As shown, the present invention provides a secondary slider demolding mechanism, including a first slider assembly, a second slider assembly, and a guide post fixing block 1; The first slider assembly is slidably connected to the injection mold, and the first slider assembly includes a first slider 2; The second slider assembly includes a base 3, a second slider 4, an arc slider 5, and a rocker arm 6. The base 3 is fixedly connected to the first slider 2, and the base 3 includes an arc guide part 7 and a straight guide part 8. The second slider 4 is slidably engaged with the straight guide part 8, the arc slider 5 is slidably engaged with the arc guide part 7, and the two ends of the rocker arm 6 are respectively hinged to the second slider 4 and the arc slider 5. The guide post fixing block 1 is fixedly connected to the injection mold, and the guide post fixing block 1 is fixedly connected to the first inclined guide post 9 and the second inclined guide post 10. The first inclined guide post 9 is slidably engaged with the first slider 2, and the second inclined guide post 10 is slidably engaged with the second slider 4. In the mold closing state, the distance between the second inclined guide post 10 and the second slider 4 is less than the distance between the first inclined guide post 9 and the first slider 2.

[0022] The working principle of the secondary slider demolding mechanism of the present invention, adopting the above scheme, is as follows: When the injection mold begins to open, the guide post fixing block 1 moves with the mold. The guide post fixing block 1 drives the first inclined guide post 9 and the second inclined guide post 10 to move synchronously. Because the distance between the second inclined guide post 10 and the second slider 4 is small, the second inclined guide post 10 first contacts the second slider 4 and drives the second slider 4 to move backward (i.e., away from the product) along the straight guide section 8. When the second slider 4 moves backward, because the two ends of the rocker arm 6 are hinged to the second slider 4 and the arc slider 5 respectively, the linear motion of the second slider 4 is converted into the arc motion of the arc slider 5 through the rocker arm 6. As the second slider 4 continues to move backward, the arc slider 5 has moved along the arc trajectory to the position where it is completely separated from the arc undercut of the product 100, and the arc demolding is completed. At this stage, because the distance between the first inclined guide post 9 and the first slider 2 is large, the first inclined guide post 9 has not yet contacted the first slider 2, so the first slider 2 remains stationary. After the arc-shaped demolding is completed, the guide post fixing block 1 continues to move with the mold. At this time, the first inclined guide post 9 begins to contact the first slider 2 and drives the first slider 2 to move backward. When the first slider 2 moves backward, it drives the second slider assembly fixedly connected to it to move backward as well, thereby moving the first slider 2 and the second slider assembly away from the product 100. When the first slider 2 moves to completely detach from the lateral undercut of the product 100, the straight demolding is completed. After that, the product 100 can be ejected normally by the ejection mechanism of the injection mold, completing a complete injection cycle.

[0023] In another specific embodiment, such as Figure 2 As shown, the first slider 2 has an opening 11 through which the arc slider 5 passes.

[0024] By adopting the above solution, the arc slider 5 can pass through the opening 11 inside the first slider 2 and directly cooperate with the product 100, realizing the spatial integration of arc forming and straight forming, reducing the overall volume of the mold, and making the overall structure compact.

[0025] In another specific embodiment, such as Figure 1 As shown, the guide post fixing seat 1 is provided with a notch 12 for avoiding the second slider assembly.

[0026] By adopting the above solution, the second slider assembly can be effectively avoided during mold closing, preventing interference and ensuring smooth mold closing. At the same time, the spatial layout is further optimized, making the mold structure more compact.

[0027] In another specific embodiment, such as Figure 1 As shown, the first slider assembly also includes a wear-resistant block 13, which is fixedly connected to the first slider 2.

[0028] By adopting the above solution, the friction and wear between the first slider 2 and the mold can be effectively reduced, the service life of the first slider 2 and the mold can be extended, and the maintenance cost can be reduced.

[0029] In another specific embodiment, such as Figure 3 and Figure 4 As shown, arc-shaped pressure strips 14 are provided on both sides of the arc-shaped slider 5.

[0030] By adopting the above solution, the arc slider 5 can be precisely guided and limited, ensuring that the arc slider 5 moves smoothly along the arc trajectory, improving demolding accuracy, and avoiding product damage caused by movement deviation.

[0031] In another specific embodiment, such as Figure 3 and Figure 4 As shown, straight pressure strips 15 are provided on both sides of the second slider 4.

[0032] By adopting the above solution, the second slider 4 can be precisely guided and limited, ensuring that the second slider 4 moves smoothly along a straight trajectory, thereby improving demolding accuracy and motion reliability.

[0033] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A secondary slider demolding mechanism, characterized in that, Includes a first slider assembly, a second slider assembly, and a guide post fixing block; The first slider assembly is slidably connected to the injection mold, and the first slider assembly includes a first slider; The second slider assembly includes a base, a second slider, an arc slider, and a rocker arm. The base is fixedly connected to the first slider and includes an arc guide portion and a straight guide portion. The second slider is slidably engaged with the straight guide portion, and the arc slider is slidably engaged with the arc guide portion. The two ends of the rocker arm are respectively hinged to the second slider and the arc slider. The guide post fixing block is fixedly connected to the injection mold, and the guide post fixing block is fixedly connected to a first inclined guide post and a second inclined guide post. The first inclined guide post is slidably engaged with the first slider, and the second inclined guide post is slidably engaged with the second slider. In the mold closing state, the distance between the second inclined guide post and the second slider is less than the distance between the first inclined guide post and the first slider.

2. The secondary slider demolding mechanism according to claim 1, characterized in that, The first slider has an opening through which the arc-shaped slider passes.

3. The secondary slider demolding mechanism according to claim 1, characterized in that, The guide post fixing seat is provided with a notch for avoiding the second slider assembly.

4. The secondary slider demolding mechanism according to claim 1, characterized in that, The first slider assembly further includes a wear-resistant block, which is fixedly connected to the first slider.

5. The secondary slider demolding mechanism according to claim 1, characterized in that, The circular arc slider is provided with circular arc pressure strips on both sides.

6. The secondary slider demolding mechanism according to claim 1, characterized in that, The second slider has straight pressure strips on both sides.

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