Novel ejector pin first reset, prevent the structure and die of hitting front mold

Abstract

The utility model discloses a novel ejection pin first reset, prevent and hit the structure and die of front mould, including needle and ejection pin board, the ejection pin board includes ejection pin bottom plate and ejection pin faceplate, the needle has guide rod department and thickens the hanging platform department, the installation hole is provided with on the ejection pin faceplate and passes through, the installation hole includes upper hole part and lower hole part, thickens the hanging platform department and is slid to set in the lower hole part, and the height of thickens the hanging platform department is less than the depth of lower hole part, the guide rod department is by upper hole part and passes, and thickens the hanging platform department can not by upper hole part and pass, be provided with the elastic jacking structure on the ejection pin bottom plate, under the natural state, the elastic jacking structure will needle jacking to thickens the hanging platform department's upper end contact to the upper end of lower hole part, when closing mould, the needle is prior to the ejection workpiece contact A board on the ejection pin board, and then AB board closes mould again, so can effectively avoid the problem of the front mould of avoiding closing mould and hitting the ejection pin.

Description

Technical Field

[0001] This utility model relates to the field of mold anti-collision technology, specifically a novel ejector pin resetting structure to prevent collision with the front mold and a mold. Background Technology

[0002] In injection mold production, when the rear mold ejection structure may penetrate or collide with the front mold shape, conventional ejector pin reset structures cannot avoid the risk of mold collision, which hinders stable mass production.

[0003] The working logic of a conventional ejector pin reset structure is as follows: during the mold closing stage, the ejector plate is first pressed back by the spring force, and then the ejector pin is pressed into the front mold to achieve the "locking" and positioning of the ejector plate, thereby achieving the ejector pin return requirement. However, in the actual mold assembly process, the ejector pin and the mold are prone to gaps, causing the ejector structure (such as angled ejectors, ejector pins, etc.) to collide with the front mold first during mold closing. This not only causes physical damage to the front mold cavity, ejector pins, or angled ejectors, but may also lead to quality problems such as flash and dimensional deviations in the product. Utility Model Content

[0004] The purpose of this utility model is to provide a novel ejector pin resetting structure and mold to prevent collision with the front mold, which can effectively avoid the problem of the front mold colliding with the ejector pin during mold closing, without affecting fully automated production or interfering with the external structure of the mold blank.

[0005] This utility model is implemented as follows: According to a first aspect of this utility model, this utility model provides a novel ejector pin resetting structure to prevent collision with the front mold, comprising a return pin and an ejector plate. The ejector plate includes an ejector pin base plate and an ejector pin face plate. The return pin has a guide rod portion and a thickened mounting platform portion, the thickened mounting platform portion being located at the lower end of the guide rod portion. The ejector pin face plate is located on the upper side of the ejector pin base plate, and the two are connected by bolts. A mounting hole is provided through the ejector pin face plate, the mounting hole including an upper hole portion and a lower hole portion. The shape and size of the cross-section of the lower hole portion are the same as the shape and size of the horizontal base surface of the thickened mounting platform portion. The thickened mounting platform portion is slidably disposed in the lower hole portion, and the height of the thickened mounting platform portion is less than the depth of the lower hole portion. The guide rod portion passes through the upper hole portion, and the thickened mounting platform portion cannot pass through the upper hole portion. An elastic lifting structure is provided on the ejector pin base plate. In the natural state, the elastic lifting structure lifts the return pin until the upper end of the thickened mounting platform portion contacts the upper end of the lower hole portion.

[0006] Furthermore, the diameter of the upper hole is the same as the diameter of the guide rod, and the two are fitted with a clearance.

[0007] Furthermore, the difference between the depth of the lower hole and the height of the thickened mounting platform is 5mm.

[0008] Furthermore, the elastic lifting structure includes a mounting groove on the upper end surface of the ejector base plate aligned with the mounting hole on the ejector panel, and a spring disposed in the mounting groove, the upper end of the spring pressing against the thickened hanging platform portion.

[0009] Furthermore, the mounting groove is a cylindrical groove, which is arranged along the same central axis as the upper hole, and the thickened hanging platform cannot extend into the mounting groove.

[0010] According to a second aspect of this utility model, this utility model provides a mold having the above-mentioned novel ejector pin resetting first and preventing collision with the front mold structure.

[0011] Furthermore, it also includes a mold base plate, an A plate, and a B plate. The mold base plate is located below the ejector base plate, and a space is reserved between the mold base plate and the ejector base plate for the ejector plate to move. The B plate is located above the ejector panel, and the A plate is located above the B plate. The B plate is provided with a guide clearance hole for the guide rod of the return needle to pass through. In its natural state, the elastic lifting structure lifts the return needle to the upper end of the guide rod, which is higher than the upper end of the guide clearance hole.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. When the mold is closed, the return pin contacts the A plate before the ejector plate, so that all the workpieces on the ejector plate return to their original positions first. Then the A and B plates close the mold. This can effectively avoid the problem of the front mold hitting the ejector pin when the mold is closed.

[0013] 2. This utility model does not require additional hydraulic pipelines, pneumatic components or complex transmission components. It achieves its function solely through the adaptation design of the return pin, spring and existing ejector plate and mold plate. It will not interfere with the external contour and assembly dimensions of the mold, nor will the part picking and mold closing rhythm of the automated production line be interrupted due to the complexity of the structure. Thus, while ensuring the anti-collision effect, it ensures that the mold can stably adapt to the fully automated production process and reduces the impact of structural modification on production efficiency. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of Example 1; Figure 2 This is a cross-sectional view of Example 1; Figure 3 This is a three-dimensional structural diagram of the return needle of this utility model; Figure 4 This is a cross-sectional view of the ejector plate of this utility model; Figure 5 This is a three-dimensional structural diagram of the mold provided in Example 2; Figure 6 This is a three-dimensional structural diagram of the mold used to remove plate A in Example 2.

[0015] In the diagram: 1. Return pin; 2. Ejector pin base plate; 3. Ejector pin panel; 11. Guide rod section; 12. Thickened hanging platform section; 31. Upper hole section; 32. Lower hole section; 21. Mounting groove; 4. Spring; 5. Mold base plate; 6. Plate A; 7. Plate B. Detailed Implementation

[0016] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0017] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details: Example 1 like Figures 1-4 As shown, this embodiment provides a novel ejector pin resetting structure for molds to prevent collision with the front mold, including a return pin 1 and an ejector plate. The ejector plate includes an ejector base plate 2 and an ejector face plate 3. The ejector face plate 3 is located on the upper side of the ejector base plate 2, and the two are connected by bolts. The return pin 1 has a guide rod portion 11 and a thickened mounting platform portion 12. The guide rod portion 11 is a cylindrical structure, and the thickened mounting platform portion 12 is located at the lower end of the guide rod portion 11. A mounting hole is provided through the ejector face plate 3. The mounting hole includes an upper hole portion 31 and a lower hole portion 32. The shape and size of the cross-section of the lower hole portion 32 are the same as the shape and size of the horizontal base surface of the thickened mounting platform portion 12. The thickened mounting platform portion 12 is slidably disposed in the lower hole portion 32, and the height of the thickened mounting platform portion 12 is less than the depth of the lower hole portion 32. The difference between the depth of the lower hole portion 32 and the height of the thickened mounting platform portion 12 is 5mm. The guide rod portion 11 passes through the upper hole portion 31, while the thickened mounting platform portion 12 cannot pass through the upper hole portion 31. The diameter of the upper hole portion 31 is the same as the diameter of the guide rod portion 11, and the two are fitted with a clearance fit.

[0018] like Figure 2 and Figure 4 As shown, a mounting groove 21 is provided on the upper end surface of the ejector base plate 2, aligned with the mounting hole on the ejector panel 3. The mounting groove 21 is a cylindrical groove, and it is arranged along the same central axis as the upper hole 31. The thickened mounting platform 12 cannot extend into the mounting groove 21. A spring 4 is vertically installed in the mounting groove 21, and the upper end of the spring 4 presses against the thickened mounting platform 12. In its natural state, the spring 4 lifts the return needle 1 until the upper end of the thickened mounting platform 12 contacts the upper end of the lower hole 32.

[0019] Example 2 This embodiment provides a mold, such as Figure 5 and Figure 6 As shown, the mold has the novel ejector pin resetting and anti-collision structure provided in Embodiment 1. The mold also includes a mold base plate 5, an A plate 6, and a B plate 7. The mold base plate 5 is located below the ejector pin base plate 2, and a space is reserved between the mold base plate 5 and the ejector pin base plate 2 for the ejector pin plate to move. The B plate 7 is located above the ejector pin panel 3, and the A plate 6 is located above the B plate 7. The B plate 7 has a guide clearance hole for the guide rod portion 11 of the return pin 1 to pass through. In the natural state, the spring 4 pushes the return pin 1 up to the upper end of the guide rod portion 11 above the upper end of the guide clearance hole.

[0020] Working principle: Before mold closing, under the action of spring 4, the return pin 1 is lifted until the upper end of the thickened mounting plate 12 contacts the upper end of the lower hole 32. At this time, the upper end of the guide rod 11 of the return pin 1 is higher than the upper end of the guide clearance hole provided on plate B 7. When the mold closes, the guide rod 11 contacts plate A 6 before the ejected workpiece on the ejector plate, thereby causing all the workpieces on the ejector plate to return to their original positions first. Then plates A and B close the mold, which effectively avoids the problem of the front mold hitting the ejector pin when the mold is closed.

[0021] Furthermore, the novel ejector pin resetting and anti-collision structure for molds provided by this utility model does not require additional hydraulic lines, pneumatic components, or complex transmission components. It achieves its function solely through the adaptation design of the return pin, spring, and existing ejector plate and mold plate. It will not interfere with the external contour and assembly dimensions of the mold, nor will the part picking and mold closing rhythm of the automated production line be interrupted due to the complexity of the structure. Thus, while ensuring the anti-collision effect, it ensures that the mold can stably adapt to the fully automated production process and reduces the impact of structural modifications on production efficiency.

[0022] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A novel ejector pin resetting structure to prevent collision with the front mold, comprising a return pin (1) and an ejector plate, characterized in that, The ejector plate includes an ejector base plate (2) and an ejector panel (3). The return needle (1) has a guide rod portion (11) and a thickened mounting plate portion (12). The thickened mounting plate portion (12) is located at the lower end of the guide rod portion (11). The ejector panel (3) is located on the upper side of the ejector base plate (2), and the two are connected by bolts. A mounting hole is provided through the ejector panel (3). The mounting hole includes an upper hole portion (31) and a lower hole portion (32). The shape and size of the cross-section of the lower hole portion (32) are the same as those of the thickened mounting plate portion (12). The base surface has the same shape and size. The thickened hanging platform (12) is slidably disposed in the lower hole (32), and the height of the thickened hanging platform (12) is less than the depth of the lower hole (32). The guide rod (11) passes through the upper hole (31), and the thickened hanging platform (12) cannot pass through the upper hole (31). The ejector pin base plate (2) is provided with an elastic lifting structure. In the natural state, the elastic lifting structure lifts the return pin (1) to the upper end of the thickened hanging platform (12) and contacts the upper end of the lower hole (32).

2. The novel ejector pin resetting first and preventing collision with the front mold structure according to claim 1, characterized in that, The diameter of the upper hole (31) is the same as the diameter of the guide rod (11), and the two are fitted with a clearance.

3. The novel ejector pin resetting first and preventing collision with the front mold structure according to claim 1, characterized in that, The difference between the depth of the lower hole (32) and the height of the thickened hanging platform (12) is 5 mm.

4. The novel ejector pin resetting first and preventing collision with the front mold structure according to claim 1, characterized in that, The elastic lifting structure includes a mounting groove (21) on the upper end surface of the ejector base plate (2) aligned with the mounting hole on the ejector panel (3), and a spring (4) in the mounting groove (21), the upper end of the spring (4) pressing against the thickened hanging platform (12).

5. The novel ejector pin resetting first and preventing collision with the front mold structure according to claim 4, characterized in that, The mounting groove (21) is a cylindrical groove, which is set with the upper hole (31) along the same central axis, and the thickened hanging platform (12) cannot be inserted into the mounting groove (21).

6. A mold, characterized in that, The mold has a novel ejector pin reset structure as described in any one of claims 1-5 to prevent collision with the front mold.

7. The mold according to claim 6, characterized in that, It also includes a mold base plate (5), an A plate (6) and a B plate (7). The mold base plate (5) is located below the ejector base plate (2) and a space is reserved between it and the ejector base plate (2) for the ejector plate to move. The B plate (7) is located above the ejector panel (3) and the A plate (6) is located above the B plate (7). The B plate (7) is provided with a guide clearance hole for the guide rod part (11) of the return needle (1) to pass through. In the natural state, the elastic lifting structure lifts the return needle (1) to the upper end of the guide rod part (11) above the upper end of the guide clearance hole.

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