Forming ejection structure for a non-stick mold

Abstract

The utility model discloses a kind of forming ejection structures of anti-sticking mould, comprising: mould core component and forming ejection structure, mould core component includes front mould core and rear mould core;Forming ejection structure includes first elastic insert, second elastic insert and limit plate, and the avoidance cavity is set up on front mould core, one end of first elastic insert and one end of second elastic insert are set on limit plate, and limit plate is located at the side of front mould core away from rear mould core;Front mould core, rear mould core, first elastic insert and second elastic insert are combined to form forming cavity, when rear mould core moves in the direction away from front mould core, first elastic insert and second elastic insert sequentially push product to move in the direction close to rear mould core.Such, the structure of twice ejection product is used, so that product with deeper and longer bone position can also realize the effect of not sticking mould, and then production efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a molding ejection structure for preventing sticking to the mold. Background Technology

[0002] In the field of injection molding, the problem of product sticking to the mold during demolding has always been a key challenge affecting production efficiency and product quality, especially for products with complex ribs or deep cavities. Traditional molds typically use spring ejector pins or ejection mechanisms to achieve demolding, but these still have many technical limitations for products with high aspect ratios, thin walls, or high surface precision requirements. For example, traditional spring ejector pins or ejector rods can only provide a one-time ejection action. For products with deep ribs or complex structures, the ejection force may not be able to completely overcome the adhesion and friction between the product and the mold core, leading to problems such as localized sticking.

[0003] In view of the above, a molding ejection structure for preventing sticking to the mold is proposed to avoid the problem of local sticking of the product to the mold. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a molding ejection structure that prevents sticking to the mold, thereby avoiding the problem of localized sticking of the product to the mold.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A molding ejection structure for preventing sticking includes: a mold core assembly and a molding ejection structure. The mold core assembly includes a front mold core and a rear mold core. The molding ejection structure includes a first elastic insert, a second elastic insert, and a limiting plate. A clearance cavity is formed on the front mold core. One end of the first elastic insert and one end of the second elastic insert are disposed on the limiting plate, and the limiting plate is located on the side of the front mold core away from the rear mold core. The front mold core, the rear mold core, the first elastic insert, and the second elastic insert together form a molding cavity. When the rear mold core moves away from the front mold core, the first elastic insert and the second elastic insert sequentially push the product towards the rear mold core.

[0007] In one embodiment, the first elastic insert includes a first spring and a first insert, one end of the first spring is connected to the first insert, and the other end of the first spring is connected to the limiting plate. When the rear mold core moves away from the front mold core, the first spring drives the first insert to push the product toward the rear mold core.

[0008] In one embodiment, the first insert is further provided with a first limiting protrusion, and the front mold core is also provided with a first limiting groove, with the first limiting protrusion located in the first limiting groove.

[0009] In one embodiment, the second elastic insert includes a second spring and a second insert, one end of the second spring is connected to the second insert, and the other end of the second spring is connected to the limiting plate. When the rear mold core moves away from the front mold core, the second spring drives the second insert to push the product toward the rear mold core.

[0010] In one embodiment, the second insert is further provided with a second limiting protrusion, and the first insert is provided with a second limiting groove, the second limiting protrusion being located in the second limiting groove.

[0011] In one embodiment, the depth of the second limiting groove is greater than the depth of the first limiting groove.

[0012] In one embodiment, the limiting plate is connected and fixed to the front mold core by a screw connection.

[0013] In one embodiment, four screw connectors are provided, and the four screw connectors are distributed in a rectangular array.

[0014] Compared with the prior art, the present invention has at least the following advantages:

[0015] This utility model's anti-stick molding ejection structure incorporates a mold core assembly and a molding ejection structure. A first elastic insert and a second elastic insert are embedded in the front mold core, forming a molding cavity with the front and rear mold cores for molding the product. After the product molding process is complete, the first and second elastic inserts sequentially eject the product, thus completing the demolding operation. This two-stage ejection structure enables products with deep and long ribs to achieve a non-stick effect, thereby improving production efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below.

[0017] Figure 1 This is a structural schematic diagram of an injection-molded product;

[0018] Figure 2 This is a cross-sectional view of the molding and ejection structure of the anti-stick mold in one embodiment of the present invention.

[0019] Figure 3 for Figure 1A schematic diagram of the molding ejection structure for removing the mold core assembly in the anti-stick mold;

[0020] Figure 4 for Figure 4 Schematic diagram of the cross-sectional structure in the middle; Detailed Implementation

[0021] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be given below with reference to the accompanying drawings.

[0022] Please see Figure 2 , Figure 3 and Figure 4 As shown, a molding ejection structure for preventing sticking includes: a mold core assembly 100 and a molding ejection structure 200. The mold core assembly 100 includes a front mold core 110 and a rear mold core 120. The molding ejection structure 200 includes a first elastic insert 210, a second elastic insert 220, and a limiting plate 230. A clearance cavity is provided on the front mold core 110. One end of the first elastic insert 210 and one end of the second elastic insert 220 are disposed on the limiting plate 230, and the limiting plate 230 is located on the side of the front mold core 110 away from the rear mold core 120. The front mold core 110, the rear mold core 120, the first elastic insert 210, and the second elastic insert 220 are combined to form a molding cavity. When the rear mold core 120 moves away from the front mold core 110, the first elastic insert 210 and the second elastic insert 220 sequentially push the product to move closer to the rear mold core 120.

[0023] It should be noted that, for ease of understanding, the following is used... Figure 1 The product shown is for illustrative purposes only. Figure 1 It is a thin-walled product with deep and long ribs, resulting in a deep molding cavity. Furthermore, due to the thin wall thickness, there is insufficient space to install ejector pins or other ejection mechanisms. Using ejector pins or similar structures would also affect the product's demolding quality. Figure 1The product's depth is stepped, and a single molding ejection structure 200 cannot guarantee successful demolding in one go, leading to localized sticking of the product. Therefore, in this invention, a recessed cavity is opened on the front mold core 110, and a first elastic insert 210 and a second elastic insert 220 are embedded therein, allowing the first elastic insert 210 and the second elastic insert 220 to participate in the product molding. Simultaneously, in the mold-closed state, the first elastic insert 210 and the second elastic insert 220 are subjected to compressive force. When the mold opens, that is, when the rear mold core 120 moves away from the front mold core 110, the compressed first elastic insert 210 and the second elastic insert 220 are released, causing them to sequentially push the product towards the rear mold core 120, thus ejecting the product from the molding cavity of the front mold core 110 and achieving product demolding. Specifically, the first elastic insert 210 is located at a shallower part of the product rib, while the second elastic insert 220 is located at a deeper part of the product rib. At the same time, the ejection stroke of the second elastic insert 220 is greater than that of the first elastic insert 210. Thus, when the rear mold core 120 moves away from the front mold core 110, the first elastic insert 210 leaves the product first, while the second elastic insert 220 continues to push the product, ultimately enabling the product to be completely demolded. Furthermore, the use of a double elastic insert structure can also ensure the uniformity of the demolding force and ensure that the product has sufficient demolding force during the demolding stage, significantly reducing the risk of the product sticking to the mold.

[0024] Specifically, the first elastic insert 210 includes a first spring 211 and a first insert 212. One end of the first spring 211 is connected to the first insert 212, and the other end of the first spring 211 is connected to the limiting plate 230. When the rear mold core 120 moves away from the front mold core 110, the first spring 211 drives the first insert 212 to push the product towards the rear mold core 120.

[0025] It should be noted that the first spring 211 is located between the first insert 212 and the limiting plate 230. When the front mold core 110 and the rear mold core 120 are in the closed state, the first spring 211 is in a compressed state, and the first insert 212 is in contact with the product. To ensure that the first insert 212 can better eject the product, the molding part of the first insert 212 partially encloses the product. When the mold opens, that is, when the rear mold core 120 moves towards the front mold core 110, the compressive force applied to the first spring 211 is released, and the first spring 211 pops out towards the product, thereby driving the first insert 212 to push the product out of the molding cavity. Using a spring as a driving structure can ensure that the force and stroke of the first ejection are controllable. In this embodiment, the first insert 212 is also provided with a first limiting protrusion 212a, and the front mold core 110 is also provided with a first limiting groove 111. The first limiting protrusion 212a is located in the first limiting groove 111. Through the cooperation between the first limiting protrusion 212a and the first limiting groove 111, the first insert 212 is prevented from being excessively ejected, ensuring accurate operation. At the same time, the first insert 212 can be limited to ensure that the product is separated from the first insert 212.

[0026] Furthermore, the second elastic insert 220 includes a second spring 221 and a second insert 222. One end of the second spring 221 is connected to the second insert 222, and the other end of the second spring 221 is connected to the limiting plate 230. When the rear mold core 120 moves away from the front mold core 110, the second spring 221 drives the second insert 222 to push the product towards the rear mold core 120. Similarly, when the rear mold core 120 moves away from the front mold core 110, the compressive force applied to the second spring 221 is released, and the second spring 221 pops out towards the product, thereby driving the second insert 222 to push the product to achieve demolding. In this embodiment, the second insert 222 is further provided with a second limiting protrusion 222a, and the first insert 212 is provided with a second limiting groove 212b. The second limiting protrusion 222a is located within the second limiting groove 212b. The nested design of the second limiting protrusion 222a and the second limiting groove 212b ensures the continuity of the two ejection actions and limits the second insert 222, thereby ensuring the separation of the product from the second insert 222. Furthermore, the depth of the second limiting groove 212b is greater than the depth of the first limiting groove 111, providing additional ejection stroke for deeper bone areas of the product.

[0027] It should also be noted that in the initial stage, the front mold core 110 and the rear mold core 120 are in the closed state, the first spring 211 and the second spring 221 are in a compressed state, and the first insert 212 and the second insert 222 are in contact with the product, forming a molding cavity. When the rear mold core 120 moves away from the front mold core 110, the compressive force applied to the first spring 211 and the second spring 221 is released, causing the first spring 211 and the second spring 221 to pop out towards the product. At this time, the first insert 212 and the second insert 222 jointly apply an ejection force to the product, thus ensuring the product... Sufficient ejection force is provided to achieve demolding. Then, due to the short ejection stroke of the first spring 211 and the limitation imposed by the first limiting groove 111, the first insert 212 separates from the product first, completing the first ejection demolding. Next, the second insert 222 continues to push the product away from the front mold core 110, allowing deeper parts of the product to completely detach from the molding cavity of the front mold core 110, thus completing the second ejection demolding. After demolding, the rear mold core 120 resets and closes, keeping the first spring 211 and the second spring 221 in a compressed state, ready for the next molding cycle. This not only ensures sufficient demolding force for the product, but the staged ejection demolding also reduces the problem of product sticking to the mold, thereby improving production efficiency.

[0028] In one embodiment, the limiting plate 230 is connected and fixed to the front mold core 110 via screw connectors 300. Fixing the limiting plate 230 with screw connectors 300 not only ensures structural stability but also facilitates disassembly and maintenance. In this embodiment, four screw connectors 300 are provided, arranged in a rectangular array to ensure balanced force distribution and prevent the limiting plate 230 from shifting.

[0029] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A molding ejection structure for preventing sticking to the mold, characterized in that, include: A mold core assembly, the mold core assembly including a front mold core and a rear mold core; and A molding pop-out structure is provided, comprising a first elastic insert, a second elastic insert, and a limiting plate. A clearance cavity is provided on the front mold core. One end of the first elastic insert and one end of the second elastic insert are disposed on the limiting plate, and the limiting plate is located on the side of the front mold core away from the rear mold core. The front mold core, the rear mold core, the first elastic insert, and the second elastic insert together form a molding cavity. When the rear mold core moves away from the front mold core, the first elastic insert and the second elastic insert sequentially push the product toward the rear mold core.

2. The molding ejection structure for the anti-stick mold according to claim 1, characterized in that, The first elastic insert includes a first spring and a first insert. One end of the first spring is connected to the first insert, and the other end of the first spring is connected to the limiting plate. When the rear mold core moves away from the front mold core, the first spring drives the first insert to push the product towards the rear mold core.

3. The molding ejection structure for the anti-stick mold according to claim 2, characterized in that, The first insert is also provided with a first limiting protrusion, and the front mold core is also provided with a first limiting groove, with the first limiting protrusion located in the first limiting groove.

4. The molding ejection structure for the anti-stick mold according to claim 3, characterized in that, The second elastic insert includes a second spring and a second insert. One end of the second spring is connected to the second insert, and the other end of the second spring is connected to the limiting plate. When the rear mold core moves away from the front mold core, the second spring drives the second insert to push the product towards the rear mold core.

5. The molding ejection structure for the anti-stick mold according to claim 4, characterized in that, The second insert is also provided with a second limiting protrusion, and the first insert is provided with a second limiting groove, with the second limiting protrusion located in the second limiting groove.

6. The molding ejection structure for the anti-stick mold according to claim 5, characterized in that, The depth of the second limiting groove is greater than the depth of the first limiting groove.

7. The molding ejection structure for the anti-stick mold according to any one of claims 1-6, characterized in that, The limiting plate is connected and fixed to the front mold core by a screw connection.

8. The molding ejection structure for the anti-stick mold according to claim 7, characterized in that, The screw connectors are provided in four parts, and the four screw connectors are arranged in a rectangular array.

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